Hand-portable garden, forestry and/or construction processing device and method for operating a hand-portable garden, forestry and/or construction processing device

Abstract

A hand-portable garden, forestry and/or construction processing device has a cutting tool, an electric drive motor, a motor operating element, and a control device. The cutting tool is designed for cutting through work. The drive motor is designed for driving the cutting tool. The motor operating element is user-adjustable over an adjustment range from a minimum setting to a maximum setting. The control device is designed for controlling a target speed of the drive motor in accordance with a setting of the motor operating element in at least one first operating mode and one second operating mode. In the first operating mode, the target speed increases over at least one segment from a minimum of 0.5 times the adjustment range as the setting increases, wherein the increase changes over the segment by a maximum of 60%. In the second operating mode, the target speed is a minimum of 0.9 times a maximum target speed of the second operating mode as the setting increases from a maximum of 50% of the adjustment range.

Claims

1. A hand-portable garden, forestry and/or construction processing device, comprising: a cutting tool, wherein the cutting tool is designed for cutting through an item to be processed; an electric drive motor, wherein the drive motor is designed for driving the cutting tool; a motor operating element, wherein the motor operating element is user-adjustable over an adjustment range from a minimum setting to a maximum setting; and a control device, wherein the control device is designed for controlling a target speed of the drive motor in accordance with a setting of the motor operating element in a first operating mode and a second operating mode, wherein, in the first operating mode, the target speed increases over at least one segment from a minimum of 0.5 times the adjustment range as the setting increases, wherein the target speed increase changes over the segment by a maximum of 60%, and wherein, in the second operating mode, the target speed is a minimum of 0.9 times a maximum target speed of the second operating mode as the setting increases from a maximum of 50% of the adjustment range.

2. The hand-portable garden, forestry and/or construction processing device according to claim 1, wherein the garden, forestry and/or construction processing device is a saw, a chainsaw, a brushcutter, or a cut-off grinder, and/or wherein the cutting tool is a sawing tool, a saw chain or a saw blade or a cutting blade.

3. The hand-portable garden, forestry and/or construction processing device according to claim 1, wherein one of: (i) in the first operating mode, the target speed increases linearly over the at least one segment as the setting increases, or (ii) in the first operating mode, the target speed increase lessens over the segment as the setting increases.

4. The hand-portable garden, forestry and/or construction processing device according to claim 3, wherein, in the second operating mode, the target speed increases from a minimum target speed up to a minimum of 0.9 times the maximum target speed of the second operating mode, as the setting increases.

5. The hand-portable garden, forestry and/or construction processing device according to claim 4, wherein, in the second operating mode, the target speed increases from a start setting of the motor operating element up to a maximum of 50% of the adjustment range, wherein the target speed increase changes by a maximum of 60% from the start setting up to the maximum of 50% of the adjustment range, and/or lessens as the setting increases from the start setting.

6. The hand-portable garden, forestry and/or construction processing device according to claim 1, wherein in the second operating mode, the target speed is the maximum target speed of the second operating mode as the setting increases from the maximum of 50% of the adjustment range.

7. The hand-portable garden, forestry and/or construction processing device according to claim 1, wherein the maximum target speed of the second operating mode is higher than a maximum target speed of the first operating mode.

8. The hand-portable garden, forestry and/or construction processing device according to claim 1, wherein the control device is designed for controlling the target speed to be the minimum of 0.9 times the maximum target speed of the second operating mode by way of field weakening in the drive motor.

9. The hand-portable garden, forestry and/or construction processing device according to claim 1, wherein the control device is designed for controlling up to the minimum of 0.9 times the maximum target speed of the second operating mode with a minimum of 0.8 times a maximum output power of the drive motor.

10. The hand-portable garden, forestry and/or construction processing device according to claim 1, wherein at least one of: (i) the drive motor is a brushless DC motor, a permanent magnet synchronous motor or an asynchronous motor, or (ii) the control device is designed for field-oriented control (FOC) control or direct torque control (DTC) control.

11. The hand-portable garden, forestry and/or construction processing device according to claim 1, further comprising: an electric adjusting device, wherein the motor operating element is designed for setting an electric variable of the electric adjusting device, and wherein the control device is designed for controlling the target speed in accordance with the electric variable.

12. The hand-portable garden, forestry and/or construction processing device according to claim 1, wherein at least one of: (i) in the first operating mode, the target speed decreases when the motor operating element is returned to its minimum setting from the target speed last controlled in the time before the return, or (ii) in the second operating mode, the target speed decreases when the motor operating element is returned to its minimum setting from the target speed last controlled in the time before the return.

13. The hand-portable garden, forestry and/or construction processing device according to claim 12, wherein at least one of: (i) in the first operating mode, the target speed decreases from a maximum target speed to zero over a run-down time range of the first operating mode, wherein the target speed decrease changes by a maximum of 60% over a minimum of 0.9 times the run-down time range, or (ii) in the second operating mode, the target speed decreases from the maximum target speed to zero over a run-down time range of the second operating mode, said target speed decreasing in a first half by a maximum of 0.5 times as much as it decreases in a later half.

14. The hand-portable garden, forestry and/or construction processing device according to claim 1, further comprising: a motor operating element return element, wherein the motor operating element return element is designed for applying force to the motor operating element to return the motor operating element to its minimum setting.

15. The hand-portable garden, forestry and/or construction processing device according to claim 1, further comprising: a user-operable switchover operating element, wherein the control device is designed for switching over between at least the first operating mode and the second operating mode upon being triggered by an operation of the switchover operating element.

16. The hand-portable garden, forestry and/or construction processing device according to claim 1, further comprising: an output device, wherein the output device is designed to output user-perceivable information about control in at least the first operating mode or the second operating mode.

17. A method for operating a hand-portable garden, forestry and/or construction processing device comprising: a cutting tool, wherein the cutting tool is designed for cutting through an item to be processed; an electric drive motor, wherein the drive motor is designed for driving the cutting tool; a motor operating element, wherein the motor operating element is user-adjustable over an adjustment range from a minimum setting to a maximum setting; and a control device, wherein the control device is designed for controlling a target speed of the drive motor in accordance with a setting of the motor operating element in a first operating mode and a second operating mode, wherein, in the first operating mode, the target speed increases over at least one segment from a minimum of 0.5 times the adjustment range as the setting increases, wherein the target speed increase changes over the segment by a maximum of 60%, and wherein, in the second operating mode, the target speed is a minimum of 0.9 times a maximum target speed of the second operating mode as the setting increases from a maximum of 50% of the adjustment range, wherein the method comprises the steps of: controlling the target speed of the drive motor in accordance with the setting of the motor operating element in at least the first operating mode by way of the control device, or controlling the target speed of the drive motor in accordance with the setting of the motor operating element in at least the second operating mode by way of the control device.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) FIG. 1 shows schematically a hand-portable garden, forestry and/or construction processing device according to an embodiment of the invention and a method according to an embodiment of the invention for operating the garden, forestry and/or construction processing device;

(2) FIG. 2 shows a graph of a target speed of a drive motor against a setting of a motor operating element of the garden, forestry and/or construction processing device in FIG. 1 in a first operating mode and a graph of the target speed against the setting in a second operating mode;

(3) FIG. 3 shows a graph of a torque of the drive motor against the target speed;

(4) FIG. 4 shows a graph of a maximum output power of the drive motor against the target speed; and

(5) FIG. 5 shows a graph of the target speed against a time in the first operating mode and a graph of the target speed against time in the second operating mode.

DETAILED DESCRIPTION OF THE DRAWINGS

(6) FIG. 1 shows a hand-portable garden, forestry and/or construction processing device 1 and a method for operating the garden, forestry and/or construction processing device 1. The garden, forestry and/or construction processing device 1 has a cutting tool 2, an electric drive motor 3, a motor operating element 4, and a control device 5. The cutting tool 2 is designed for cutting through an item to be processed, in particular it cuts through an item to be processed. The drive motor 3 is designed to drive, in particular drives, the cutting tool 2. The motor operating element 4 is user-adjustable, in particular is adjusted, over an adjustment range (SB) from a minimum setting (minST) to a maximum setting (maxST), as shown in FIG. 2. The control device 5 is designed for controlling, in particular controls, a target speed (nsoll) of the drive motor 3 in accordance with a setting (ST) of the motor operating element 4 in at least one first operating mode (BM1), as shown on the left in FIG. 2, and one second operating mode (BM2), as shown on the right in FIG. 2. In the first operating mode (BM1), the target speed (nsoll) increases over at least one segment (AS, AS′) from a minimum of 0.5 times, in the exemplary embodiment shown by a continuous line on the left in FIG. 2 immediately, the adjustment range (SB) as the setting (ST) increases. The increase (ZU1, ZU1′) changes over the segment (AS, AS′) by a maximum of 60%. In the second operating mode (BM2), the target speed (nsoll) is a minimum of 0.9 times a maximum target speed (maxnsoll2) of the second operating mode (BM2) as the setting (ST) increases from a maximum of 50% of the adjustment range (SB), in particular of the segment (AS, AS′).

(7) The method has the following step: controlling the target speed (nsoll) of the drive motor 3 in accordance with the setting (ST) of the motor operating element 4 in at least the first operating mode (BM1) or the second operating mode (BM2) by means of the control device 5.

(8) In the exemplary embodiment shown by a continuous line on the left in FIG. 2, the segment (AS) starts from the minimum setting (minST) and ends with the maximum setting (maxST). In alternative exemplary embodiments, the segment can start from a start setting of the motor operating element different from the minimum setting. In the exemplary embodiment shown by a dashed line on the left in FIG. 2, the increase (ZU1′) starts from a 4% start setting (SAS′) and ends with a 75% setting.

(9) In particular, the minimum setting is (minST) 0%. In addition, the maximum setting is (maxST) 100%.

(10) In the exemplary embodiment shown by a continuous line on the left in FIG. 2, the increase (ZU1) additionally begins with a minimum target speed (minnsoll1) equal to zero and ends with a maximum target speed (maxnsoll1) of the first operating mode (BM1). In alternative exemplary embodiments, the increase can start with a minimum target speed different from zero. In particular, the increase (ZU1′) in the exemplary embodiment shown by a dashed line on the left in FIG. 2 starts with a minimum target speed (minnsoll1′) of 4000 revolutions per minute (rpm).

(11) As a further addition, in the exemplary embodiment shown, the garden, forestry and/or construction processing device 1 is a saw 1′, in particular a chainsaw 1″. In alternative exemplary embodiments, the garden, forestry and/or construction processing device can be a brushcutter or a cut-off grinder.

(12) In addition, in the exemplary embodiment shown, the cutting tool 2 is a sawing tool 2′, in particular a saw chain 2″. In alternative exemplary embodiments, the cutting tool can be a saw blade or a cutting blade.

(13) In detail, the target speed (nsoll) in the exemplary embodiment shown by a continuous line on the left in FIG. 2 increases linearly over at least the segment (AS) as the setting (ST) increases in the first operating mode (BM1).

(14) As an alternative, the increase (ZU1′) in the exemplary embodiment shown by a dashed line on the left in FIG. 2 lessens over the segment (AS′) as the setting (ST) increases in the first operating mode (BM1).

(15) Furthermore, in the second operating mode (BM2), the target speed (nsoll) increases, in particular from a start setting (SAS, SAS′) of the motor operating element 4, which is the same as the minimum setting (minST) in the exemplary embodiment shown by a continuous line on the right in FIG. 2, up to a maximum of 50% of the adjustment range (BS) as the setting (ST) increases, in particular from a minimum target speed (minnsoll2), (minnsoll2′), equal to zero in the exemplary embodiment shown by a continuous line on the right in FIG. 2, up to a minimum of 0.9 times the maximum target speed (maxnsoll2) of the second operating mode (BM2), increasing linearly in the exemplary embodiment shown by a continuous line on the right in FIG. 2. In particular the increase (ZU2, ZU2′) changes by a maximum of 60%, in particular from the start setting (SAS, SAS′), up to a maximum of 50% of the adjustment range (SB), there being no change in the exemplary embodiment shown by a continuous line on the right in FIG. 2, and/or lessens, in particular from the start setting (SAS′), up to a maximum of 50% of the adjustment range (SB) as the setting (ST) increases, in particular in the exemplary embodiment shown by a dashed line on the right in FIG. 2. In alternative exemplary embodiments, the increase can start with a minimum target speed different from zero. In particular, the increase (ZU2′) in the exemplary embodiment shown by a dashed line on the right in FIG. 2 starts with a minimum target speed (minnsoll2′) of 4000 rpm. In addition or as an alternative, the target speed (nsoll) in the exemplary embodiment shown by a dashed line on the right in FIG. 2 increases from a 4% start setting (SAS′) in the second operating mode (BM2).

(16) Moreover, in the second operating mode (BM2), the target speed (nsoll) is the maximum target speed (maxnsoll2) of the second operating mode (BM2) as the setting (ST) increases from a maximum of 50% of the adjustment range (SB).

(17) Furthermore, the maximum target speed maxnsoll2 of the second operating mode (BM2) is higher than the maximum target speed maxnsoll1 of the first operating mode (BM1).

(18) Moreover, the control device 5 is designed for controlling, in particular controls, the target speed (nsoll) to be at least equal, in particular a minimum of 0.9 times, the maximum target speed (maxnsoll2) of the second operating mode (BM2) by means of field weakening in the drive motor 3, as shown in FIG. 3.

(19) In the exemplary embodiment shown, the control device 5 is designed for controlling the target speed (nsoll) in the second operating mode (BM2) not by means of field weakening in the drive motor 3. In alternative exemplary embodiments, the control device can be designed for controlling the target speed by means of field weakening in the drive motor in at least the second operating mode. This is shown, in particular, by dashed lines in FIG. 3.

(20) Furthermore, the control device 5 is designed for controlling, in particular controls, up to a minimum of 0.9 times the maximum target speed (maxnsoll2) of the second operating mode (BM2) with a minimum of 0.8 times a maximum output power (P3) of the drive motor 3, as shown in FIG. 4.

(21) Moreover, in the exemplary embodiment shown, the drive motor 3 is a brushless DC motor 3′, as shown in FIG. 1. In alternative exemplary embodiments, the drive motor can be a permanent magnet synchronous motor or an asynchronous motor.

(22) In addition, the control device 5 is designed for, in particular controls by, FOC control or DTC control.

(23) Furthermore, the garden, forestry and/or construction processing device 1 has an electric adjusting device 6. The motor operating element 4 is designed for adjusting, in particular adjusts, an electric variable G of the adjusting device 6. The control device 5 is designed for controlling, in particular controls, the target speed (nsoll) in accordance with the variable G, as shown in FIG. 2.

(24) Moreover, in the first operating mode (BM1), the target speed (nsoll) decreases, when the motor operating element 4 is returned to its minimum setting (minST), from the target speed last controlled in the time before the return, in particular the maximum target speed (maxnsoll1), to zero over a run-down time range (AZB1) of the first operating mode (BM1), as shown on the left in FIG. 5. The decrease (AB1) changes by a maximum of 60% over a minimum of 0.9 times the run-down time range (AZB1).

(25) In addition, in the second operating mode (BM2), the target speed (nsoll) decreases, when the motor operating element 4 is returned to its minimum setting (minST), from the target speed last controlled in the time before the return, in particular the maximum target speed (maxnsoll2), to zero over a run-down time range (AZB2) of the second operating mode (BM2), said target speed decreasing in its early half (AZB2H′) by a maximum of 0.5 times as much as it decreases in its late half (AZB2H″), as shown on the right in FIG. 5.

(26) Furthermore, the garden, forestry and/or construction processing device 1 has a motor operating element return element 7, as shown in FIG. 1. The motor operating element return element 7 is designed for applying force, in particular applies force, to the motor operating element 4 to return it to its minimum setting (minST).

(27) Furthermore, the garden, forestry and/or construction processing device 1 has a user-operable switchover operating element 8. The control device 5 is designed for switching over, in particular switches over, between at least the first operating mode (BM1) and the second operating mode (BM2), this being triggered by an operation of the switchover operating element 8.

(28) Furthermore, the garden, forestry and/or construction processing device 1 has an output device 9. The output device 9 is designed to output, in particular outputs, user-perceivable information (BInfo) about control in at least the first operating mode (BM1) or the second operating mode (BM2).

(29) In the exemplary embodiment shown, the maximum target speed (maxnsoll1) of the first operating mode (BM1) is 11000 rpm. In addition or as an alternative, the maximum target speed (maxnsoll2) of the second operating mode (BM2) is 13500 rpm. In alternative exemplary embodiments, the maximum target speed of the second operating mode can be up to 35000 rpm. As a further addition or alternative, in the first operating mode (BM1) and/or in the second operating mode (BM2), in particular in each case, the, in particular available, maximum output power P3 of the drive motor 3 is 3000 watts (W). As a further addition or alternative, in the first operating mode (BM1) and/or in the second operating mode (BM2), in particular in each case, a freewheel function, in particular for the cutting tool 2, is switched on or activated.

(30) In the exemplary embodiment shown, the control device 5 is furthermore designed for controlling, in particular controls, the target speed (nsoll) in the first operating mode (BM1) and the second operating mode (BM2). In alternative exemplary embodiments, the control device can be designed for controlling, in particular can control, the target speed in the first and the second operating mode and at least one third operating mode. In particular, the third operating mode can be like the first operating mode, with the following difference/s. The maximum target speed of the third operating mode can be lower than the maximum target speed of the first operating mode, in particular 9000 rpm. In addition or as an alternative, it is possible in the third operating mode for the, in particular allowed, maximum output power of the drive motor, in particular and thus a maximum torque generated by the drive motor, to be lower than in the first operating mode, in particular between 2100 W and 2300 W. As a further addition or alternative, the freewheel function can be switched off or deactivated in the third operating mode. As a further addition or alternative, the first operating mode (BM1) can be referred to as an all-round or normal mode. As a further addition or alternative, the second operating mode (BM2) can be referred to as a speed mode. As a further addition or alternative, the third operating mode can be referred to as an eco mode.

(31) In the exemplary embodiment shown, the garden, forestry and/or construction processing device 1, in particular the drive motor 3 and/or the control device 5, are/is furthermore designed for electrical connection, in particular are/is electrically connected, to a rechargeable battery 10. In alternative exemplary embodiments, the garden, forestry and/or construction processing device can additionally or alternatively be designed for electric connection to a cable.

(32) In the exemplary embodiment shown, the cutting tool 2 and the drive motor 3 are furthermore coupled, in particular mechanically, as shown by a continuous line in FIG. 1. Furthermore, the drive motor 3 and the control device 5 are coupled, in particular electrically, as shown by a dotted line in FIG. 1. Moreover, the control device 5 and the potentiometer 6 are coupled, in particular electrically. Furthermore, the potentiometer 6 and the motor operating element 4 are coupled, in particular mechanically. Moreover, the motor operating element 4 and the motor operating element return element 7 are coupled, in particular mechanically. Furthermore, the control device 5 and the switchover operating element 8 are coupled, in particular electrically. Moreover, the control device 5 and the output device 9 are coupled, in particular electrically.

(33) As the exemplary embodiments shown and explained above make clear, the invention makes available an advantageous hand-portable garden, forestry and/or construction processing device and/or an advantageous method for operating a hand-portable garden, forestry and/or construction processing device of this kind, which, in particular in each case, has improved characteristics, in particular is user-friendly.

(34) The foregoing disclosure has been set forth merely to illustrate the invention and is not intended to be limiting. Since modifications of the disclosed embodiments incorporating the spirit and substance of the invention may occur to persons skilled in the art, the invention should be construed to include everything within the scope of the appended claims and equivalents thereof.