Portable Machine Tool comprising an SDS Tool Holder

Abstract

A hand-held power tool includes an SDS tool receiver and a tool housing. The SDS tool receiver includes at least one vacuuming-off channel and is configured to receive an exchangeable insert tool such that the at least one vacuuming-off channel enables removal of dust produced during operation of the exchangeable insert tool with a workpiece. The tool housing includes at least one drive unit configured to drive the exchangeable insert tool.

Claims

1. A hand-held power tool, comprising: an SDS tool receiver including at least one vacuuming-off channel and configured to receive an exchangeable insert tool such that the at least one vacuuming-off channel enables removal of dust produced during operation of the exchangeable insert tool with a workpiece; and a tool housing including at least one drive unit configured to drive the exchangeable insert tool.

2. The hand-held power tool as claimed in claim 1, wherein the SDS tool receiver further includes a receiver housing that defines the at least one vacuuming-off channel.

3. The hand-held power tool as claimed in claim 1, wherein: the SDS tool receiver further includes a closure element and a main body that is adjustable between an open position and a closed position via the closure element; and the main body is connected to the tool housing, formed onto the tool housing, or integral with the tool housing.

4. The hand-held power tool as claimed in claim 3, further comprising a clamping device disposed within the main body and configured to clamp the exchangeable insert tool.

5. The hand-held power tool as claimed in claim 3, wherein the at least one vacuuming-off channel is at least partially defined by at least one of: (i) the main body and (ii) the closure element.

6. The hand-held power tool as claimed in claim 3, wherein: the main body includes at least one first flute-type channel; the closure element includes at least one second flute-type channel; and in the closed position of the main body, the first flute-type channel and the second flute-type channel define the at least one vacuuming-off channel.

7. The hand-held power tool as claimed in claim 3, wherein the closure element includes a locking element configured to lock the closure element to the main body.

8. The hand-held power tool as claimed in claim 7, wherein the locking element includes at least one latching element and is configured to latch onto the main body.

9. The hand-held power tool as claimed in claim 7, wherein: the locking element is configured to connect to the main body via a screw connection; and the main body includes at least one screw thread.

10. The hand-held power tool as claimed in claim 3, wherein the closure element is pivotably mounted on the main body.

11. The hand-held power tool as claimed in claim 1, wherein the at least one vacuuming-off channel is has a tubular shape.

12. The hand-held power tool as claimed in claim 1, further comprising a vacuuming-off connection piece connected to the at least one vacuuming-off channel and configured to connect to an external vacuuming-off system.

13. The hand-held power tool as claimed in claim 1, wherein the SDS tool receiver is further configured to receive an exchangeable insert tool that has a cutting strand configured to revolve around an assigned guide unit.

14. The hand-held power tool as claimed in claim 1, wherein the hand-held power tool is a chain saw.

15. An SDS tool receiver comprising at least one vacuuming-off channel and configured to receive an exchangeable insert tool such that the at least one vacuuming-off channel enables removal of dust produced during operation of the exchangeable insert tool with a workpiece.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0034] The invention is explained in greater detail in the following description on the basis exemplary embodiments represented in the drawings. There are shown in:

[0035] FIG. 1 a perspective view of a hand-held power tool realized in the manner of a chain saw, having an SDS tool receiver according to a first embodiment,

[0036] FIG. 2 a perspective view of a portion of an underside of the hand-held power tool having the SDS tool receiver from FIG. 1,

[0037] FIG. 3 a perspective side view of the SDS tool receiver from FIG. 1 and FIG. 2, in the opened state,

[0038] FIG. 4 a perspective side view of a portion of the hand-held power tool from FIG. 1, having an SDS tool receiver according to a second embodiment, and

[0039] FIG. 5 a perspective view of a portion of an underside of the hand-held power tool from FIG. 1, having the SDS tool receiver from FIG. 4.

Description of the exemplary embodiments

[0040] FIG. 1 shows a hand-held power tool 100, having a tool housing 107 that is provided, by way of example, with a bail-type handle 109. Preferably, disposed in the tool housing 107 there is at least one drive unit 110, for driving an exchangeable insert tool 115 designed for working on workpieces. The drive unit 110 can be actuated by a user, i.e. at least switched on and switch off, e.g. via a manually operated switch 105, or manually operated button, is preferably realized as a drive motor and is therefore also referred to in the following as a “drive motor 110”. This drive motor 110 may be any type of motor, e.g. an electronically commutated motor or a direct-current motor. Preferably, the drive motor 110 can be electronically controlled by open-loop or closed-loop control, by means of an electronic control unit, in such a manner that, for example, specifications in respect of a desired rotational speed of the drive motor 110 can be realized. The workings and the structure of such a drive motor 110, and of the electronic control unit, are adequately known from the prior art, such that, for the purpose of conciseness of description, a detailed description is not given here.

[0041] According to one embodiment, a tool receiver 120 that, according to the invention, is realized in the manner of an SDS tool receiver, is provided to receive the exchangeable insert tool 115. In the context of the present invention, the term “SDS tool receiver” refers generally to a quick-clamp tool receiver, in which the exchangeable mini-tools can be clamped without the use of a tool. Such a quick-clamp tool receiver preferably has a structure like that of, for example, the quick-clamp tool receiver known from DE 10 2012 211 094 A1,the disclosure of which is explicitly included, as an integral constituent part, in the present description, such that, for the purpose of conciseness and simplicity of description, there is no need for a detailed description of the structure and functionality of the SDS tool receiver 120.

[0042] It is pointed out, however, that the present invention is not limited to an SDS tool receiver constructed as in DE 10 2012 211 094 A1, but may be applied quite generally in the case of all SDS tool receivers for receiving exchangeable SDS mini-tools, irrespective of whether the SDS tool receiver is an SDS-max, SDS-quick,

[0043] SDS-plus or SDS-top tool receiver. Furthermore, it is pointed out that the present invention may also be applied in the case of quick-clamp tool receivers whose structure is merely similar to that of usual SDS tool receivers, or that have a similar functionality, but that are not identified by the designation “SDS”, since the latter, as undoubtedly known by persons skilled in the art, is a designation created by Robert Bosch GmbH for quick-clamp tool receivers, or mini-tools.

[0044] The SDS tool receiver 120 preferably has a receiver housing 122, 124, having a closure element 122 and a main body 124, the closure element 122 being realized to close the main body 124, at least when the hand-held power tool 100 is in operation. The main body 124 is preferably connected to the tool housing 107, formed onto the tool housing 107 or realized so as to be integral with the tool housing 107. Furthermore, for the purpose of locking to the main body 124, the closure element 122 preferably has a locking element 160, described in greater detail below with reference to FIG. 2, and is preferably disposed in a pivotable manner on the base 124, as illustrated in FIG. 3.

[0045] Preferably, the hand-held power tool 100 is realized in the manner of a chain saw, as also shown and described in DE 10 2012 211 094 A1, in which the exchangeable insert tool 115 is realized in the manner of cutting strand 116 realized to orbit around an assigned guide unit 117. For the purpose of simplicity and clarity of description, therefore, the hand-held power tool 100 is also referred to in the following as the “chain saw 100”. Preferably, the cutting strand 116 of the chain saw 100 is realized as a cutting chain.

[0046] Furthermore, a foot plate 150 is assigned to the chain saw 100, by means of which the latter can be placed on an assigned workpiece that is to be worked, or guided thereon. In the region of the insert tool 115 that, by way of example, is disposed perpendicularly in relation to the tool housing 107, the foot plate 150 has a recess 152, through which the insert tool 115 extends.

[0047] According to one embodiment, a vacuuming-off connecting piece 130, via which dust produced during working on a workpiece can be removed, is disposed on the tool housing 107, in the region of the SDS tool receiver 120. Preferably, the vacuuming-off connecting piece 130 is bent at an angle, and can be connected to an external vacuum cleaning system.

[0048] Furthermore, the chain saw 100 is equipped with a flexible electrical connecting lead 140 for mains-dependent power supply. It is pointed out, however, that the present invention is not limited to chain saws that have mains-dependent operation, but instead may be applied in the case of a multiplicity of hand-held power tools that are provided with an SDS tool receiver within the meaning of the present invention, irrespective of whether these hand-held power tools are of a main-dependent or battery-operated design.

[0049] FIG. 2 shows a portion of the chain saw 100 from FIG. 1, viewed in the direction of an arrow II from FIG. 1 or, by way of illustration, viewed in the direction of the underside thereof, and illustrates the SDS tool receiver 120 with the receiver housing 122, 124 from FIG. 1, which comprises the main body 124 and the closure element 122. According to one embodiment, the SDS tool receiver 120 has at least one vacuuming-off channel 212, by way of illustration a first and a second vacuuming-off channel 212, 214, which are each realized to remove dust produced during working on a workpiece. Preferably, for this purpose the vacuuming-off channels 212, 214 can be connected to an external vacuuming cleaning system via the vacuuming-off connecting piece 130 from FIG. 1.

[0050] By way of illustration, the vacuuming-off channels 212, 214 are tubular in form, preferably having a circular cross section. It is pointed out, however, that the present invention is not limited to tubular vacuuming-off channels having a circular cross section, but may be applied in the case of any cross-sectional shapes, e.g. in the case of angled shapes.

[0051] According to one embodiment, the vacuuming-off channels 212, 214 are formed into the receiver housing 122, 124, and in this case are preferably realized, at least in regions, in the main body 124 thereof and/or in the closure element 122 thereof. Preferably, the main body 124 has at least one first and, by way of illustration, two first flute-type channels 232, 234, and the closure element 122 is provided with at least one second and, by way of illustration, two second flute-type channels 222, 224.

[0052] These first and second flute-type channels 232, 234, 222, 224 are preferably realized so as to realize the two vacuuming-off channels 212, 214 when the receiver housing 122, 124 is closed. For this purpose, the first and second flute-type channels 232, 234, 222, 224 preferably each have a semicircular cross section, and are realized in the main body 124, or in the closure element 122, in such a manner that, upon closure of the main body 124 by means of the closure element 122, the first flute-type channels 232, 234 overlap with the second flute-type channels 222, 224 and, with the latter, respectively realize tubular structures.

[0053] According to one embodiment, disposed in the main body 124 there is a clamping device 220, which is realized to clamp the insert tool 115 from FIG. 1, or the guide unit 117 with the cutting strand 116, at least portionally, in the SDS tool receiver 120. Operationally reliable locking of the clamping device 220 is effected in this case by closure of the main body 124 by means of the closure element 122. In order to prevent unintentional opening of the closure element 122 when the chain saw 100 from FIG. 1 is in operation, the closure element 122 can be locked, preferably latched, to the main body 124 by means of the locking element 160. For this purpose, the locking element 160 preferably has at least one latching element 262 that is realized, for example, after a latching lug that can be latched on the main body 124.

[0054] FIG. 3 shows the SDS tool receiver 120 from FIG. 1 and FIG. 2, to illustrate the flute-type channels 222, 224, 232, 234 from FIG. 2 that are realized in the main body 124 and in the closure element 122. These flute-type channels 222, 224, 232, 234, and therefore the vacuuming-off channels 212, 214 from FIG. 1 and FIG. 2, are preferably disposed on both sides of the insert tool 115 from FIG. 1 and FIG. 2. By way of illustration, the flute-type channels 222, 232 are disposed, in the longitudinal direction of the chain saw 100 from FIG. 1, on the right of the insert tool 115, or in the region between the insert tool 115 and the connecting lead 140 from FIG. 1, and the flute-type channels 224, 234 are disposed, in the longitudinal direction of the chain saw 100, by way of illustration, on the other side—on the left in FIG. 3—of the insert tool 115. Thus, sawing chips or dust that is produced, for example, during working on a workpiece can be removed, or vacuumed off, directly from the cutting strand 116.

[0055] It is pointed out, however, that the disposition, described above, of the flute-type channels 232, 234, 222, 224 in the longitudinal direction of the chain saw 100 from FIG. 1 is merely exemplary, and is not to be understood as limiting of the invention. Rather, said channels may also be disposed in the transverse direction, or in any other manner, and a different number of flute-type channels may also be implemented.

[0056] Furthermore, FIG. 3 illustrates the pivotable connection between the locking element 160 and the main body 124, and illustrates the locking element 160 preferably realized for latching on the main body 124. Said locking element is provided, at least, with the latching element 262 from FIG. 2, and preferably with at least one further latching element 362, which is preferably realized in a manner similar to the latching element 362.

[0057] It is pointed out that the latching elements 262, 362 are disposed on the locking element 160 merely by way of example, and alternatively may also be disposed on the main body 124 and/or on the tool housing 107. Moreover, functionally similar latching elements, or alternative locking elements, may be used, e.g. press pins.

[0058] Moreover, FIG. 3 shows the clamping device 220 of the insert tool 115 from FIG. 2 with a cutting-strand holding element 320 that, by way of illustration, is disposed on the guide unit 117 of the cutting strand 116. Preferably, the cutting-strand holding element 320 is realized, at least, to fix the guide unit 117 with the cutting strand 116 in the SDS tool receiver 120, or to a drive element 330 in an operationally reliable manner. The drive element 330 is connected to the drive motor 110, and is realized to drive the cutting strand 116.

[0059] FIG. 4 shows the SDS tool receiver 120 from FIG. 1 to FIG. 3 with the main body 124 realized according to a second embodiment, in which, however, as described in the case of FIG. 2 and FIG. 3, the flute-type channels 232, 234 are disposed on both sides of the insert tool 115. Unlike the first embodiment represented in the case of FIG. 1, however, the main body 124 according to the second embodiment is realized to enable screw connection to the closure element 122 from FIG. 1 to FIG. 3. For this purpose, at least one screw thread 410 is preferably provided on the main body 124 according to the second embodiment.

[0060] FIG. 5 shows the SDS tool receiver 120 from FIG. 4, as viewed in the direction of an arrow 402 from FIG. 4 or, by way of illustration, as viewed in the direction of the underside thereof. In a manner similar to FIG. 2, the flute-type channels 222, 224, 232, 234 realize a first and a second vacuuming-off channel 212, 214, which are preferably disposed on both sides of the insert tool 115 from FIG. 4. In this case, by way of illustration, the first vacuuming-off channel 212 is disposed on the right of the insert tool 115, and the second vacuuming-off channel 214 is disposed, by way of illustration, on the left of the insert tool 115.