Machine Tool Device

Abstract

The disclosure relates to a machine tool device, in particular a handheld machine tool device, comprising at least one control and/or regulating unit and at least one drive unit sensor unit for detecting at least one drive unit parameter that can be processed at least in order to control and/or regulate a drive unit of a machine tool and/or in order to output information to an operator of the control and/or regulating unit. According to the disclosure, the machine tool device comprises at least one operator sensor unit in order to detect at least one operator-specific parameter that can be processed at least in order to control and/or regulate the drive unit and/or in order to output information to an operator of the control and/or regulating unit.

Claims

1. A power tool device comprising: at least one control unit, the at least one control unit being at least one of a closed-loop control unit and an open-loop control unit; at least one drive unit sensor unit configured to record at least one drive unit characteristic variable, the at least one control unit being configured to process the at least one drive unit characteristic variable to at least one of: (i) control a drive unit of a power tool and (ii) provide an output of information to an operator of the power tool; and at least one operator sensor unit configured to record at least one operator-specific characteristic variable, the at least one control unit being configured to process the at least one operator-specific characteristic variable to at least one of: (i) control the drive unit of the power tool and (ii) provide an output of information to the operator of the power tool.

2. The power tool device as claimed in claim 1, further comprising: at least one communication unit configured to communicate with at least one external unit and exchange electronic data with the at least one external unit to provide control of the drive unit.

3. The power tool device as claimed in claim 2, wherein the control unit is configured to access a central database using the communication unit, the central database being configured to store at least one of (i) a safety rule and (ii) an operating area rule, the control unit being configured to process the at least one of the safety rule and the operating rule to control the drive unit.

4. The power tool device as claimed in claim 1, wherein the control unit is configured to detect at least in dependence on the at least one operator-specific characteristic variable, an operation of the power tool that cannot be controlled by the operator.

5. The power tool device at least as claimed in claim 2, wherein the control unit is configured to output at least one emergency signal using the communication unit at least in dependence on the at least one operator-specific characteristic variable.

6. The power tool device as claimed in claim 1, wherein the control unit is configured to at least one of (i) control the drive unit and (ii) output an item of information at least in dependence on the operator-specific characteristic variable formed as operator exposure to stress.

7. The power tool device as claimed in claim 1, wherein the control unit is configured to process an output of at least one ambient sensor unit to record at least one ambient characteristic variable, the at least one control unit being configured to process the at least one ambient characteristic variable to at least one of: (i) control a drive unit of the power tool and (ii) provide an output of information to the operator of the power tool.

8. The power tool device as claimed in claim 6, wherein the control unit is configured to adapt at least one parameter stored in a memory unit of the control unit to control the drive unit at least in dependence on at least one ambient characteristic variable recorded with of an ambient sensor unit and formed as a global position.

9. The power tool device as claimed in claim 1, further comprising: at least one power tool accessory sensor unit configured to record at least one power tool accessory characteristic variable, the at least one control unit being configured to process the at least one power tool accessory characteristic variable to at least one of: (i) control a drive unit of the power tool and (ii) provide an output of information to the operator of the power tool.

10. The power tool device as claimed in claim 1, further comprising: at least one machining tool sensor unit configured to record at least one machining tool characteristic variable, the at least one control unit being configured to process the at least one machining tool characteristic variable to at least one of: (i) control a drive unit of the power tool and (ii) provide an output of information to the operator of the power tool.

11. The power tool device as claimed in claim 1, further comprising: at least one workpiece sensor unit configured to record at least one workpiece characteristic variable, the at least one control unit being configured to process the at least one workpiece characteristic variable to at least one of: (i) control a drive unit of the power tool and (ii) provide an output of information to the operator of the power tool.

12. The power tool device as claimed in claim 10, wherein, in at least one operating mode, the control unit is configured to control the drive unit in dependence on at least one workpiece characteristic variable that is recorded with of the workpiece sensor unit and defines an object that is located in a workpiece.

13. The power tool device as claimed in claim 1, wherein the drive unit sensor unit is configured to record the at least one drive unit characteristic variable formed as at least one of a ventilation characteristic variable and an operator risk characteristic variable.

14. The power tool device as claimed in claim 1, wherein the power tool device is included in a portable power tool.

15. A power tool system comprising: a power tool having a power tool device, the power tool device comprising: at least one control unit, the at least one control unit being at least one of a closed-loop control unit and an open-loop control unit; at least one drive unit sensor unit configured to record at least one drive unit characteristic variable, the at least one control unit being configured to process the at least one drive unit characteristic variable to at least one of: (i) control a drive unit of the power tool and (ii) provide an output of information to an operator of the power tool; and at least one operator sensor unit configured to record at least one operator-specific characteristic variable, the at least one control unit being configured to process the at least one operator-specific characteristic variable to at least one of: (i) control the drive unit of the power tool and (ii) provide an output of information to the operator of a power tool; and an external sensor unit.

16. A method for controlling at least one power tool in at least one of an open-loop manner and a closed-loop manner, the at least one power tool having a power tool device comprising (i) at least one control unit, the at least one control unit being at least one of a closed-loop control unit and an open-loop control unit, (ii) at least one drive unit sensor unit configured to record at least one drive unit characteristic variable, the at least one control unit being configured to process the at least one drive unit characteristic variable to at least one of control a drive unit of the power tool and provide an output of information to an operator of the power too, and (iii) at least one operator sensor unit configured to record at least one operator-specific characteristic variable, the at least one control unit being configured to process the at least one operator-specific characteristic variable to at least one of control the drive unit of the power tool and provide an output of information to the operator of a power tool, the method comprising: determining, with the control unit at least one operator state; and at least one of: outputting the operator state using of an information output unit; providing at least one of open-loop and closed-loop control of the drive unit; and providing at least one safety function of the power tool.

17. The method as claimed in claim 16, further comprising: accessing, in at least one operating mode, with the control unit at least partially automatically using of a communication unit a central database, the central database being configured to store at least one of (i) a safety rule and (ii) an operating area rule, the control unit being configured to process the at least one of the safety rule and the operating rule to control the drive unit.

18. The method as claimed in claim 16, further comprising: using, with the control unit, at least one of data recorded by a power tool sensor and data transmitted by a communication unit to provide the at least one of open-loop and closed-loop control of the drive unit.

19. The method as claimed in claim 16, further comprising: outputting, with the control unit, at least one item of information using of an information output unit in dependence on at least one of data recorded by a power tool sensor and data transmitted by a communication unit.

20. The method as claimed in claim 16, further comprising: controlling, with the control unit, at least one operating mode setting of the power tool in dependence on at least one of data recorded by a power tool sensor and data transmitted by a communication unit.

Description

DRAWING

[0045] Further advantages emerge from the following description of the drawing. In the drawing, exemplary embodiments of the invention are represented. The drawing, the description and the claims contain numerous features in combination. A person skilled in the art will expediently also consider the features individually and bring them together into further appropriate combinations.

[0046] In the drawing:

[0047] FIG. 1 shows a power tool according to the invention, which is formed as an angle grinder, with at least one power tool device according to the invention in a schematic representation,

[0048] FIG. 2 shows a schematic representation of the power tool device according to the invention,

[0049] FIG. 3 shows a schematic representation of an alternative power tool device according to the invention,

[0050] FIG. 4 shows an alternative power tool according to the invention, which is formed as a hammer drill and/or a chipping hammer, with a power tool device according to the invention in a schematic representation,

[0051] FIG. 5 shows a further alternative power tool according to the invention, which is formed as a battery-operated screwdriver, with a power tool device according to the invention in a schematic representation and

[0052] FIG. 6 shows a further alternative power tool according to the invention, which is formed as a jigsaw, with a power tool device according to the invention in a schematic representation.

DESCRIPTION OF THE EXEMPLARY EMBODIMENTS

[0053] FIG. 1 shows a power tool 34a with at least one power tool device 10a. The power tool 34a is formed as a portable power tool. Here, the power tool 34a is formed as an angle grinder. Consequently, the power tool 34a comprises at least one power tool accessory unit 38a, formed as a protective shroud unit. The power tool 34a also comprises at least one power tool housing 40a and a main handle 42a, which extends on a side of the power tool housing 40a that is facing away from a machining tool 44a in the direction of a main direction of extent 46a of the power tool 34a. The machining tool 44a is formed here as a grinding disk. It is however also conceivable that the machining tool 44a is formed as a cutting or polishing disk. The power tool housing 40a comprises a motor housing 48a for receiving a drive unit 16a of the power tool 34a. The power tool housing 40a further comprises a transmission housing 50a for receiving an output unit 52a of the power tool 34a. The drive unit 16a is intended for driving the machining tool 44a in a rotational manner by way of the output unit 52a. Arranged on the transmission housing 50a is a further power tool accessory unit 54a, formed as an additional handle unit. The power tool accessory unit 54a formed as an additional handle unit extends transversely in relation to the main direction of extent 46a of the power tool 34a.

[0054] The power tool device 10a is formed as a handheld power tool device. The power tool device 10a preferably comprises a power supply device 84a (FIG. 2). Consequently, the power tool device 10a can be operated independently of a power supply of the power tool 34a. It is however also conceivable that, in an alternative configuration of the power tool device 10a, the power tool device 10a can be supplied with power by means of a power supply device of the power tool 34a. The power tool device 10a further comprises at least one open-loop and/or closed-loop control unit 12a and at least one drive unit sensor unit 14a for recording at least one drive unit characteristic variable, which can be processed by the open-loop and/or closed-loop control unit 12a for at least providing an open-loop and/or closed-loop control of a drive unit 16a of the power tool 34a and/or for providing an output of information to an operator. In at least one operating mode of the power tool 34a, the open-loop and/or closed-loop control unit 12a is intended for providing an open-loop and/or closed-loop control of the drive unit 16a in dependence on the at least one drive unit characteristic variable recorded by means of the drive unit sensor unit 14a. The drive unit sensor unit 14a is further intended for recording at least one drive unit characteristic variable formed as a ventilation characteristic variable and/or a drive unit characteristic variable formed as an operator risk characteristic variable.

[0055] Furthermore, the power tool device 10a comprises at least one operator sensor unit 18a for recording at least one operator-specific characteristic variable, which can be processed by the open-loop and/or closed-loop control unit 12a at least for providing an open-loop and/or closed-loop control of the drive unit 16a and/or for providing an output of information to an operator. The open-loop and/or closed-loop control unit 12a is intended for providing an open-loop and/or closed-loop control of the drive unit 16a in dependence on the at least one operator-specific characteristic variable recorded by means of the operator sensor unit 18a and in dependence on the at least one drive unit characteristic variable recorded by means of the drive unit sensor unit 14a.

[0056] The power tool device 10a further comprises at least one power tool accessory sensor unit 26a for recording at least one power tool accessory characteristic variable, which can be processed by the open-loop and/or closed-loop control unit 12a at least for providing an open-loop and/or closed-loop control of the drive unit 16a and/or for providing an output of information to an operator. In at least one operating mode of the power tool 34a, the open-loop and/or closed-loop control unit 12a is intended for providing an open-loop and/or closed-loop control of the drive unit 16a in dependence on the at least one drive unit characteristic variable recorded by means of the drive unit sensor unit 14a, in dependence on the at least one operator-specific characteristic variable recorded by means of the operator sensor unit 18a and in dependence on the at least one power tool accessory characteristic variable recorded by means of the power tool accessory sensor unit 26a. The power tool device 10a further comprises at least one machining tool sensor unit 28a for recording at least one machining tool characteristic variable, which can be processed by the open-loop and/or closed-loop control unit 12a at least for providing an open-loop and/or closed-loop control of the drive unit 16a and/or for providing an output of information to an operator. At least in an initial learning operating mode, the open-loop and/or closed-loop control unit 12a is intended here for providing an at least partially automatic open-loop and/or closed-loop control of the drive unit 16a in dependence on the at least one drive unit characteristic variable recorded by means of the drive unit sensor unit 14a, in dependence on the at least one machining tool characteristic variable recorded by means of the machining tool sensor unit 28a, in dependence on the at least one operator-specific characteristic variable recorded by means of the operator sensor unit 18a and in dependence on the at least one power tool accessory characteristic variable recorded by means of the power tool accessory sensor unit 26a. The initial learning operating mode is automatically activated after the power tool 34a is put into operation, until an idling speed is reached. A centrifugal mass of the machining tool 44a can be determined by means of the open-loop and/or closed-loop control unit 12a by way of at least one inertia sensor 56a of the machining tool sensor unit 28a, at least one torque sensor 58a of the machining tool sensor unit 28a and/or a current sensor 60a of the drive unit sensor unit 14a (FIG. 2). The inertia sensor 56a is preferably formed as a three-axis acceleration sensor. The determined centrifugal mass can be unequivocally assigned to a certain machining tool type by way of at least one characteristic map stored in a memory unit (not represented any more specifically here) of the open-loop and/or closed-loop control unit 12a. It is also conceivable that a recording of further machining tool characteristic variables additionally takes place by way of RFID, NFC, scanning a barcode, data matrix codes or the like. Drive unit parameters can be adapted and/or can be changed in dependence on the machining tool 44a determined by the open-loop and/or closed-loop control unit 12a for providing an open-loop and/or closed-loop control of the drive unit 16a.

[0057] In the initial learning operating mode of the power tool 34a, a rotational speed that is optimum for the machining tool 44a can be set at least partially automatically by means of the open-loop and/or closed-loop control unit 12a in dependence on a material (steel, stainless steel, stone, concrete, wood etc.) of a workpiece to be machined. For this purpose, the power tool device 10a has at least one workpiece sensor unit 30a for recording at least one workpiece characteristic variable, which can be processed by the open-loop and/or closed-loop control unit 12a at least for providing an open-loop and/or closed-loop control of the drive unit 16a and/or for providing an output of information to an operator. For this purpose, the workpiece sensor unit 30a comprises at least one workpiece sensor element 74a (FIG. 2). At least in the initial learning operating mode, the open-loop and/or closed-loop control unit 12a is intended here for providing an at least partially automatic open-loop and/or closed-loop control of the drive unit 16a in dependence on the at least one drive unit characteristic variable recorded by means of the drive unit sensor unit 14a, in dependence on the at least one operator-specific characteristic variable recorded by means of the operator sensor unit 18a, in dependence on the at least one machining tool characteristic variable recorded by means of the machining tool sensor unit 28a, in dependence on the at least one power tool accessory characteristic variable recorded by means of the power tool accessory sensor unit 26a and in dependence on the at least one workpiece characteristic variable recorded by means of the workpiece sensor unit 30a.

[0058] Furthermore, in the initial learning operating mode of the power tool 34a, abnormalities with regard to vibration of the machining tool 44a during running up to an idling speed of the drive unit 16a can be recorded. As a result, incorrect mounting, wear and/or a defect of the machining tool 44a can be recorded. Consequently, by means of the open-loop and/or closed-loop control unit 12a, information can be output to an operator by way of an information output unit 36a of the power tool device 10a and/or the drive unit 16a can be actively decelerated and/or a power supply to the drive unit 16a can be interrupted. Moreover, as a result of a determination of the machining tool 44a, a rotational speed of the drive unit 16a that is suitable as a maximum for the machining tool 44a can be set. Consequently, at least in the initial learning operating mode, the open-loop and/or closed-loop control unit 12a determines a machining tool state and outputs the machining tool state by means of the information output unit 36a and/or makes allowance for the machining tool state for providing an open-loop and/or closed-loop control of the drive unit 16a of the power tool 34a.

[0059] Moreover, the power tool 34a has at least one machining tool securing unit 62a, which comprises at least one securing element (not represented any more specifically here) for securing the machining tool 44a to a tool holder 82a of the power tool 34a. Here, the machining tool sensor unit 28a has at least one securing sensor element 64a, which is intended for monitoring secure fastening of the machining tool 44a to the tool holder 82a. If the securing sensor element 64a records a detached state of the machining tool 44a, a power supply to the drive unit 16a can be interrupted by means of the open-loop and/or closed-loop control unit 12a. Consequently, operation of the drive unit 16a is disabled. It is conceivable that a drive spindle and/or a clamping nut of the power tool 34a has a bore into which the securing element is insertable, in particular is insertable by way of a servomotor, the position of which can be recorded by means of the securing sensor element 64a. Furthermore, it is also conceivable that a securing element formed as a clamping nut can be prestressed by means of an at least partially automatic tightening unit to a defined torque, it being possible for the torque to be recorded by means of the torque sensor 58a.

[0060] Furthermore, in one configuration of the power tool device 10a a vibration exciter element 66a (FIG. 2) of the power tool device 10a, by means of which a secure arrangement of the machining tool 44a on the drive spindle can be checked, is arranged in the securing element formed as a clamping nut. The vibration exciter element 66a may be formed as a smart material element, as a piezo element, as an oscillating coil element or as some other exciter element that appears appropriate to a person skilled in the art. Here, the vibration exciter element 66a can be used to set the machining tool 44a in vibration, which can be recorded by means of the machining tool sensor unit 28a and can be evaluated by means of the open-loop and/or closed-loop control unit 12a. The machining tool 44a can furthermore be divided into portions by means of the open-loop and/or closed-loop control unit 12a, it being possible for each portion to be evaluated individually by the open-loop and/or closed-loop control unit 12a with regard to a vibration. Consequently, damage to the machining tool 44a in one portion can be advantageously detected. Further configurations that appear appropriate to a person skilled in the art for recording machining tool characteristic variables are likewise conceivable.

[0061] The power tool device 10a further comprises at least one ambient sensor unit 24a for recording at least one ambient characteristic variable, which can be processed by the open-loop and/or closed-loop control unit 12a at least for providing an open-loop and/or closed-loop control of the drive unit 16a and/or for providing an output of information to an operator. The ambient sensor unit 24a comprises at least one position sensor 86a, which records a spatial alignment of the power tool 34a. The position sensor 86a is preferably formed as a three-axis movement sensor. It is however also conceivable that the position sensor 86a has some other configuration that appears appropriate to a person skilled in the art. Moreover, the ambient sensor unit 24a has at least one location determination sensor 88a, which records a global position of the power tool 34a. The location determination sensor 88a is preferably formed as a GPS sensor. It is however also conceivable that the location determination sensor 88a has some other configuration that appears appropriate to a person skilled in the art.

[0062] The power tool device 10a further comprises at least one input unit 32a for providing an input of at least one machining characteristic variable, which can be processed by the open-loop and/or closed-loop control unit 12a at least for providing an open-loop and/or closed-loop control of the drive unit 16a. By means of the input unit 32a, at least an open-loop and/or closed-loop control of the drive unit 16a can be influenced by the open-loop and/or closed-loop control unit 12a. Moreover, by means of the input unit 32a, an operating mode of the power tool 34a can be set. The power tool 34a has here at least the initial learning operating mode, a learning operating mode, a reference operating mode, a safety operating mode, a synchronization operating mode and/or an automatic operating mode. At least in the safety operating mode, the open-loop and/or closed-loop control unit 12a is intended here for providing an at least partially automatic open-loop and/or closed-loop control of the drive unit 16a in dependence on the at least one drive unit characteristic variable recorded by means of the drive unit sensor unit 14a, in dependence on the at least one operator-specific characteristic variable recorded by means of the operator sensor unit 18a, in dependence on the at least one machining tool characteristic variable recorded by means of the machining tool sensor unit 28a, in dependence on the at least one power tool accessory characteristic variable recorded by means of the power tool accessory sensor unit 26a, in dependence on the at least one ambient characteristic variable recorded by means of the ambient sensor unit 24a, in dependence on the electronic data received at least by means of a communication unit 20a of the power tool device 10a and in dependence on the at least one workpiece characteristic variable recorded by means of the workpiece sensor unit 30a.

[0063] By means of the position sensor 86a of the ambient sensor unit 24a, a spatial alignment of the power tool 34a can be recorded. Consequently, for example, overhead work with the power tool 34a, which entails a higher risk of an operator being injured than work with the power tool 34a in which the operator handles the power tool 34a below his head, can be detected by means of the open-loop and/or closed-loop control unit 12a. When overhead work is detected, the safety operating mode can be activated automatically by the open-loop and/or closed-loop control unit 12a if it has until then been unactivated. In the safety operating mode, safety functions are activated more quickly than in other operating modes of the power tool 34a.

[0064] Furthermore, a global position of the power tool 34a can be recorded by means of the location determination sensor 88a of the ambient sensor unit 24a. Consequently, in dependence on a location characteristic variable transmitted by means of the communication unit 20a and in dependence on a global position of the power tool recorded by means of the location determination sensor 88a, it can be evaluated by means of the open-loop and/or closed-loop control unit 12a whether the power tool 34a is in an area where safety is at risk and restricted machining of workpieces is allowed here. When a global position is detected in an area where safety is at risk, a necessity for automatic activation of the safety operating mode can be evaluated by the open-loop and/or closed-loop control unit 12a if it has until then been unactivated. Here, the open-loop and/or closed-loop control unit 12a adapts at least one parameter stored in a memory unit of the open-loop and/or closed-loop control unit 12a for providing an open-loop and/or closed-loop control of the drive unit 16a at least in dependence on at least the ambient characteristic variable recorded by means of the ambient sensor unit 24a and formed as a global position.

[0065] Moreover, in dependence on an operator state being recorded by means of the operator sensor unit 18a and/or an operator state, such as for example a level of training of an operator, being transmitted from an external unit 22a by means of the communication unit 20a to the open-loop and/or closed-loop control unit 12a, the safety operating mode can be activated automatically by the open-loop and/or closed-loop control unit 12a if it has until then been unactivated.

[0066] Moreover, a position of both hands of an operator can be recorded by means of the operator sensor unit 18a. In the safety operating mode, a power supply to the drive unit 16a can be interrupted in the event of one-handed operation by the operator if two-handed operation of the power tool 34a is prescribed. Moreover, it is conceivable that an engaging function for a snap-in engagement of an operating element of the power tool 34a is deactivated in the safety operating mode and only a dead man's function is activated. Consequently, safe guidance of the power tool 34a can be advantageously achieved.

[0067] The operator sensor unit 18a also comprises at least one operator sensor element 68a (FIG. 2), which is intended for recording at least one operator-specific characteristic variable. The operator sensor element 68a is formed here as a vibration sensor, in particular as a three-axis acceleration sensor. By means of the operator sensor unit 18a, in particular a vibration that acts on an operator can be recorded on the power tool housing 40a and/or on the main handle 42a. By means of the open-loop and/or closed-loop control unit 12a, a rotational speed can be altered when a resonance and/or a maximum vibration value is reached. Moreover, a pressing pressure and/or a pressing force of an operator on the power tool 34a can be recorded by means of the operator sensor unit 18a. Consequently, safe guidance of the power tool 34a can be advantageously monitored. Moreover, in the safety operating mode, a protective shroud unit position of the protective shroud unit can be actively changed by means of the open-loop and/or closed-loop control unit 12a, in particular as a result of recording a position of the protective shroud unit by the power tool accessory sensor unit 26a. In the safety operating mode, the open-loop and/or closed-loop control unit 12a consequently determines at least one operator state and outputs the operator state by means of the information output unit 36a and/or makes allowance for the operator state for providing an open-loop and/or closed-loop control of the drive unit 16a and/or at least one safety function of the power tool 34a.

[0068] Moreover, an operator-specific characteristic variable of an operator that is formed as a pulse and/or as a body temperature and can be used for assessing for example a stage of fatigue of the operator by the open-loop and/or closed-loop control unit 12a can be recorded by means of the operator sensor unit 18a. Furthermore, electronic data with regard to safety clothing and/or equipment of an operator can be transmitted by means of the communication unit 20a to the open-loop and/or closed-loop control unit 12a. Consequently, a necessity for activation of the safety operating mode can be evaluated by means of the open-loop and/or closed-loop control unit 12a in dependence on the operator-specific characteristic variable and in dependence on the electronic data. Moreover, characteristic variables of the ambient sensor unit 24a, of the power tool accessory sensor unit 26a, of the machining tool sensor unit 28a and/or of the workpiece sensor unit 30a can likewise be included for this purpose. Furthermore, the open-loop and/or closed-loop control unit 12a is intended for detecting at least in dependence on the at least one operator-specific characteristic variable operation of the power tool 34a that cannot be controlled by an operator. Moreover, the open-loop and/or closed-loop control unit 12a is intended for outputting at least one emergency signal by means of the communication unit 20a at least in dependence on at least one operator-specific characteristic variable recorded by means of the operator sensor unit 18a, in particular when it is detected that an operator is at risk and/or is injured. Furthermore, the open-loop and/or closed-loop control unit 12a is intended for controlling the drive unit 16a in an open-loop and/or closed-loop manner and/or for outputting an item of information by means of the information output unit to an operator at least in dependence on an operator-specific characteristic variable formed as operator exposure to stress, in particular on an operator-specific characteristic variable formed as an operator vibration exposure level.

[0069] Furthermore, the open-loop and/or closed-loop control unit 12a is intended for accessing by means of the communication unit 20a a central database, in which there is stored at least one safety and/or operating area rule, which can be processed by the open-loop and/or closed-loop control unit 12a at least for providing an open-loop and/or closed-loop control of the drive unit 16a. Here, in at least one operating mode, the open-loop and/or closed-loop control unit 12a accesses at least partially automatically by means of the communication unit 20a the central database, in which there is stored at least one safety and/or operating area rule that can be processed by the open-loop and/or closed-loop control unit 12a at least for providing an open-loop and/or closed-loop control of the drive unit 16a. Consequently, the open-loop and/or closed-loop control unit 12a uses data recorded by the power tool sensor and/or data transmitted by the communication unit at least for providing an open-loop and/or closed-loop control of the drive unit 16a. Furthermore, the open-loop and/or closed-loop control unit 12a outputs at least one item of information by means of an information output unit 36a of the power tool device 10a in dependence on data recorded by the power tool sensor and/or data transmitted by the communication unit, in particular for informing an operator about a state of the power tool and/or for warning that there is a risk. Moreover, the open-loop and/or closed-loop control unit 12a controls at least one operating mode setting of the power tool in an open-loop and/or closed-loop manner in dependence on data transmitted by the communication unit.

[0070] In the learning operating mode, the open-loop and/or closed-loop control unit 12a is intended for providing an at least partially automatic open-loop and/or closed-loop control of the drive unit 16a in dependence on the at least one drive unit characteristic variable recorded by means of the drive unit sensor unit 14a, in dependence on the at least one machining tool characteristic variable recorded by means of the machining tool sensor unit 28a and in dependence on the at least one power tool accessory characteristic variable recorded by means of the power tool accessory sensor unit 26a. The learning operating mode is carried out here after activation by means of the input unit 32a up until switching over to another operating mode of the power tool 34a or up until switching off of the power tool 34. As long as the learning operating mode is activated, all of the aforementioned characteristic variables are constantly monitored by means of the respective sensor units and parameters and/or characteristic curves of the drive unit 16a are adapted by means of the open-loop and/or closed-loop control unit 12a.

[0071] In the synchronization operating mode of the power tool 34a, a connection to the external unit 22a can be established at least substantially automatically. For this purpose, the power tool device 10a comprises at least the communication unit 20a for communication with at least the external unit 22a for an exchange of electronic data at least for providing an open-loop and/or closed-loop control of the drive unit 16a. Maps of characteristic curves can be transmitted here by means of the communication unit 20a for providing an open-loop and/or closed-loop control of the drive unit 16a. Stored here in the external unit 22a are parameters and/or characteristic curves for providing an open-loop and/or closed-loop control of the drive unit 16a, which can be transmitted to the open-loop and/or closed-loop control unit 12a as a result of a connection between the external unit 22a and the communication unit 20a. The parameters and/or characteristic curves may be individual settings of an operator, such as for example a rapid run-up to a desired rotational speed of the drive unit 16a, stipulations by a company, such as for example that machining of workpieces can only be carried out in a dangerous area if safety accessory requirements are met, or the like.

[0072] Adjustment of a job assignment for an operator can be achieved here in the synchronization operating mode with a machining job assignment stored in the external unit 22a. Adjustment of the type of tool, type of machining, type of workpiece, etc. mentioned in the job assignment takes place. Moreover, in the synchronization operating mode, an access authorization can be issued and/or, in dependence on an access authorization, the action of putting the power tool 34a into operation can be disabled and/or enabled. In the synchronization operating mode there is moreover a transmission of working location characteristic variables, which can be evaluated by the open-loop and/or closed-loop control unit 12a with regard to activation of the safety operating mode.

[0073] Moreover, in the synchronization operating mode, vibration values, which can be recorded by means of the operator sensor unit 18a and can be used for the payment of bonuses or for monitoring an amount of vibration to which an operator is exposed per day, can be transmitted to the external unit 22a. Furthermore, a running time and a type of loading of the power tool 34a can be recorded and can be transmitted to the external unit 22a. As a result, a proposal for a different machining tool and/or a different power tool or the like can be output by means of the information output unit 36a.

[0074] In the automatic operating mode of the power tool 34a, the aforementioned operating modes are selected automatically by the open-loop and/or closed-loop control unit 12a, in particular in dependence on recorded characteristic variables that can be determined by means of the aforementioned sensor units. In the automatic operating mode there is an at least substantially automatic open-loop and/or closed-loop control of the drive unit 16a by the open-loop and/or closed-loop control unit 12a in dependence on the machining tool sensor unit 28a, on the operator sensor unit 18a, on the workpiece sensor unit 30a, on the power tool accessory sensor unit 26a and on the ambient sensor unit 24a. The open-loop and/or closed-loop control unit 12a is intended here in at least one operating mode to control the drive unit 16a in an open-loop and/or closed-loop manner in dependence on at least one workpiece characteristic variable that is recorded by means of the workpiece sensor unit 30a and defines an object located in a workpiece.

[0075] In FIG. 3, an alternative power tool device 10a is represented. The alternative power tool device 10a has an at least substantially analogous configuration in comparison with the power tool device 10a schematically represented in FIG. 2. As a difference from the power tool device 10a schematically represented in FIG. 2, the alternative power tool device 10a schematically represented in FIG. 3 has at least one preprocessing unit 78a. The preprocessing unit 78a is intended to organize a communication of a number of sensor elements and/or sensor units of the alternative power tool device 10a with one another and/or with an open-loop and/or closed-loop control unit 12a of the alternative power tool device 10a. The preprocessing unit 78a is intended here to combine individual sensor signals and make preliminary decisions. A communication between the preprocessing unit 78a and the open-loop and/or closed-loop control unit 12a may take place here in a cableless and/or cable-bound manner.

[0076] FIGS. 4 to 6 show further exemplary embodiments of the invention. The following description and the drawing are substantially confined to the differences between the exemplary embodiments, it being possible in principle also to refer to the drawing and/or the description of the other exemplary embodiments, in particular of FIGS. 1 to 3, with respect to components with the same designations, in particular with respect to components with the same reference numerals. To distinguish between the exemplary embodiments, the letter a has been added after the reference numerals of the exemplary embodiment in FIGS. 1 to 3. In the exemplary embodiments of FIGS. 4 to 6, the letter a has been substituted by the letters b or c.

[0077] FIG. 4 shows a power tool 34b with at least one power tool device 10b. The power tool 34b is formed as a portable power tool. The power tool 34b is formed here as a hammer drill and/or a chipping hammer. The power tool 34b comprises at least one percussion mechanism device 80b. The power tool 34b further comprises a power tool housing 40b, arranged on which, in a front region, is a tool holder 82b of the power tool 34b for receiving a machining tool 44b. On a side facing away from the front region, the power tool 34b comprises a main handle 42b for guiding the power tool 34b and for transmission of a force, in particular a pressing force, from an operator to the power tool 34b. The power tool 34b is further formed with a detachable additional handle unit. The additional handle unit may be detachably fastened here to the power tool housing 40b by way of a snap-in connection or other connections that appear appropriate to a person skilled in the art.

[0078] For generating a drive moment and for generating a percussive impulse by means of the percussion mechanism device 80b, the power tool 34b has a drive unit 16b. By way of an output unit 52b of the power tool 34b, a drive moment of the drive unit 16b for generating a percussive impulse is transmitted to the percussion mechanism device 80b. It is however also conceivable that the power tool 34b is formed in such a way that it is decoupled from the output unit 52b and the drive unit 16b acts substantially directly on the percussive mechanism device 80b for generating a percussive impulse. A percussive impulse of the percussion mechanism device 80b is generated in a way that is known to a person skilled in the art. A rotating drive of the tool holder 82b, and consequently of the machining tool 44b, is likewise generated in a way that is already known to a person skilled in the art.

[0079] By analogy with the power tool device 10a described in the description of FIGS. 1 to 3, the power tool device 10b comprises at least one machining tool sensor unit 28b, at least one operator sensor unit 18b, at least one workpiece sensor unit 30b, at least one power tool accessory sensor unit 26b, at least one ambient sensor unit 24b, at least one input unit 32b, at least one communication unit 20b and at least one information output unit 36b.

[0080] By means of the input unit 32b, an operating mode of the power tool 34b can be set. The power tool 34b has here at least an initial learning operating mode, a learning operating mode, a reference operating mode, a synchronization operating mode, a safety operating mode and/or an automatic operating mode. In the initial learning operating mode, a machining tool characteristic variable can be recorded by means of the machining tool sensor unit 28b. A machining tool diameter of the machining tool 44b arranged in the tool holder 82b can be determined by way of a machining tool sensor element 70b formed as a displacement sensor and/or a distance sensor. The machining tool sensor unit 28a may comprise here further machining tool sensor elements 72a, 76a that appear appropriate to a person skilled in the art.

[0081] By means of the operator sensor element 68b of the operator sensor unit 18b, a time of operator machining and/or an operator exposure to vibration can be recorded. Consequently, a necessity for activation of the safety operating mode can be evaluated by means of the open-loop and/or closed-loop control unit 12b in dependence on the time of operator machining and/or operator exposure to vibration. Moreover, characteristic variables of the ambient sensor unit 24b, of the power tool accessory sensor unit 26b, of the machining tool sensor unit 28b and/or of the workpiece sensor unit 30b can likewise be included for this purpose. For example, a torque clutch of the power tool 34b can be set here to a low slip moment by means of the open-loop and/or closed-loop control unit 12b. As a result, when there is jamming of the machining tool 44b, a small torque can be transferred to an operator and a risk of injury can be advantageously kept low.

[0082] Moreover, a spatial position of the power tool 34b can be recorded by means of a position sensor 86b of the ambient sensor unit 24b. At least one position compensating element (not represented any more specifically here), such as for example a gyroscope element, which acts in an assisting manner in maintaining a drilling angle, can be activated by means of the open-loop and/or closed-loop control unit 12b. Consequently, maintaining a drilling angle previously set by means of the input unit 32b is advantageously achievable.

[0083] In the reference operating mode, moreover, an optimum operating point can be determined by the open-loop and/or closed-loop control unit 12b by means of an evaluation of characteristic variables of the machining tool sensor unit 28b, of the operator sensor unit 18b, of the workpiece sensor unit 30b, of the power tool accessory sensor unit 26b, of the ambient sensor unit 24b, of the input unit 32b, of the communication unit 20b and/or of the information output unit 36b. For example, a torque, a rotational speed and/or a pressing pressure, which can be evaluated by the open-loop and/or closed-loop control unit 12b, can be recorded for this purpose. With regard to further features of the power tool device 10b, reference may be made to the power tool device 10a described in the description of FIGS. 1 to 3.

[0084] FIG. 5 shows a power tool 34c with at least one power tool device 10c. The power tool 34c is formed as a portable power tool. The power tool 34c is formed here as a battery-operated screwdriver. The power tool 34c comprises at least one power tool housing 40c, arranged on which, in a front region, is a tool holder 82c of the power tool 34c for receiving a machining tool (not represented any more specifically here). On a side facing away from the front region, the power tool 34c comprises a main handle 42c for guiding the power tool 34c and for transmission of a force, in particular a pressing force, from an operator to the power tool 34c. The power tool 34c has a drive unit 16c for generating a drive moment. A drive moment of the drive unit 16c for generating a rotational movement is transmitted to the tool holder 82c by way of an output unit 52c of the power tool 34c. It is however also conceivable that the power tool 34c is formed in such a way that it is decoupled from the output unit 52c and the drive unit 16c acts substantially directly on the tool holder 82c for generating a rotational movement. A rotating drive of the tool holder 82c and of the machining tool is consequently produced in a way that is already known to a person skilled in the art.

[0085] By analogy with the power tool device 10a described in the description of FIGS. 1 to 3, the power tool device 10c comprises at least one machining tool sensor unit 28c, at least one operator sensor unit 18c, at least one workpiece sensor unit 30c, at least one power tool accessory sensor unit 26c, at least one ambient sensor unit 24c, at least one input unit 32c, at least one communication unit 20c and at least one information output unit 36c.

[0086] By means of the input unit 32c, an operating mode of the power tool 34c can be set. The power tool 34c has here at least an initial learning operating mode, a learning operating mode, a reference operating mode, a synchronization operating mode, a safety operating mode and/or an automatic operating mode. In the initial learning operating mode, a machining tool characteristic variable can be recorded by means of the machining tool sensor unit 28c. A machining tool diameter of the machining tool arranged in the tool holder 82c can be determined by way of a machining tool sensor element 70c formed as a displacement sensor and/or a distance sensor.

[0087] In the synchronization operating mode, a connection between the open-loop and/or closed-loop control unit 12c and a charger (not represented any more specifically here) can be established. It can be evaluated by means of the open-loop and/or closed-loop control unit 12c when a rechargeable battery arranged on the power tool 34c is discharged and when a rechargeable battery arranged in the charger is fully charged. It can consequently be extrapolated when the rechargeable battery that is in use is discharged and, according to requirements, the second rechargeable battery must be charged sparingly or rapidly.

[0088] A safe standing position of an operator can be recorded and/or can be evaluated by means of an operator sensor element 68c of the operator sensor unit 18c and/or by means of a transmission of an operator standing characteristic variable from the communication unit 20c, which communicates with an external unit (not represented any more specifically here) formed as a safety clothing monitoring unit, to the open-loop and/or closed-loop control unit 12c. The safe standing position can be recorded for example as a result of a sensor element in a working shoe of an operator and be transmitted to the open-loop and/or closed-loop control unit 12c by means of the communication unit 20c. Furthermore, an operator fatigue characteristic variable can be recorded by means of the operator sensor unit 18c in dependence on a reaction time of an intervention by an operator for example in response to a sudden countertorque and/or a value of a gripping force of an operator. Consequently, a necessity for activation of the safety operating mode can be evaluated by means of the open-loop and/or closed-loop control unit 12c in dependence on the operator standing characteristic variable and/or an operator fatigue characteristic variable. Moreover, characteristic variables of the ambient sensor unit 24c, of the power tool accessory sensor unit 26c, of the machining tool sensor unit 28c and/or of the workpiece sensor unit 30c can likewise be included for this purpose. With regard to further features of the power tool device 10c, reference may be made to the power tool device 10a described in the description of FIGS. 1 to 3.

[0089] FIG. 6 shows a power tool 34d with at least one power tool device 10d. The power tool 34d is formed as a portable power tool. Here, the power tool 34d is formed as a jigsaw. The power tool 34d has a power tool housing 40d, which encloses a drive unit 16d of the power tool 34d and an output unit 52d of the power tool 34d. The drive unit 16d and the output unit 52d are intended for driving in an oscillating manner a machining tool 44d clamped in a tool holder 82d of the power tool 34d. Here, the machining tool 44d is driven in an oscillating manner substantially perpendicularly in relation to a machining direction. The machining tool 44d is formed as a jigsaw blade. It is however also conceivable that the machining tool 44d is formed by some other machining tool that appears appropriate to a person skilled in the art. An oscillating drive of the machining tool 44d takes place here in a way that is already known to a person skilled in the art.

[0090] By analogy with the power tool device 10a described in the description of FIGS. 1 to 3, the power tool device 10d comprises at least one machining tool sensor unit 28d, at least one operator sensor unit 18d, at least one workpiece sensor unit 30d, at least one power tool accessory sensor unit 26d, at least one ambient sensor unit 24d, at least one input unit 32d, at least one communication unit 20d and at least one information output unit 36d.

[0091] By means of the input unit 32d, an operating mode of the power tool 34d can be set. The power tool 34d has here at least an initial learning operating mode, a learning operating mode, a reference operating mode, a synchronization operating mode, a safety operating mode and/or an automatic operating mode. In the initial learning operating mode, a machining tool characteristic variable can be recorded by means of the machining tool sensor unit 28d. An oscillation of the machining tool 44d can be generated here as a result of activation of the drive unit 16d or of an additional actuator of the machining tool sensor unit 28d. The oscillation of the machining tool 44d can be recorded by means of a machining tool sensor element 70d, which is formed as an acceleration sensor, and can be evaluated by means of the open-loop and/or closed-loop control unit 12d. Consequently, for example, a defect or improper mounting of the machining tool 44d can be inferred.

[0092] A frequency of corrections to a cut that is to be made, which can be attributed to fatigue of an operator, can be recorded by means of an operator sensor element 68d of the operator sensor unit 18d. Consequently, a necessity for activation of the safety operating mode can be evaluated by means of the open-loop and/or closed-loop control unit 12d in dependence on the frequency of corrections. Moreover, characteristic variables of the ambient sensor unit 24d, of the power tool accessory sensor unit 26d, of the machining tool sensor unit 28d and/or of the workpiece sensor unit 30d can likewise be included for this purpose. With regard to further features of the power tool device 10d, reference may be made to the power tool device 10a described in the description of FIGS. 1 to 3.