Pressing element for power tool

Abstract

A power tool, in particular a rotary hammer or a combination hammer, is disclosed, which includes an impact mechanism device for generating an impact pulse on the tool, and has: a base body for receiving the rear end of the tool; at least one first locking element and a second locking element, each of which is reversibly arranged in a radial opening of the base body in a locked position or a released position, wherein in the locked position the rear end of the tool is retained in the base body, and in the released position the rear end of the tool can be removed from the base body; a locking ring for retaining the at least first locking element and the second locking element in the locked position; and a pressing element for guiding the at least first locking element and the second locking element in a first axial direction and a second axial direction. The pressing element is at least partially composed of an elastic material.

Description

Technical Field

[0001] The present invention relates to a power tool, in particular a rotary hammer or a combination hammer, which includes an impact mechanism device for generating an impact pulse on the tool, and the power tool has: a base body, which is used to receive the rear end of the tool; at least one first locking element and a second locking element, each locking element is reversibly arranged in a radial opening of the base body in a locked position or a released position, wherein in the locked position, the rear end of the tool is retained in the base body, and in the released position, the rear end of the tool can be removed from the base body; a locking ring, which is used to retain at least the first locking element and the second locking element in the locked position; and a pressing element, which is used to guide at least the first locking element and the second locking element along a first axial direction and a second axial direction. Background Art

[0002] Power tools in the form of rotary hammers or combination hammers of the type mentioned at the outset are known in principle from the prior art. Rotary hammers or combination hammers usually have a tool mount for receiving and holding the tool on the power tool. The tool mount transmits the torque generated in the drive of the power tool to the tool, ensures that the impact pulse is transmitted from the impact mechanism device to the base plate by allowing limited axial movement, and prevents the tool from falling out of the power tool.

[0003] Due to the impact mechanism pulses at high frequencies, parts of the tool assembly are exposed to high dynamic vibrations. If the tool is accelerated by the impact pulses from the impact mechanism, but this impact energy cannot be transferred to the substrate to be removed, this is known as blank tool impact. These blank tool impacts can cause considerable damage to the power tool, since the energy of the impact pulses is not transferred to the substrate to be processed (i.e., the material), but is chipped off at parts of the power tool and in particular at the tool assembly. Summary of the invention

[0004] An object of the present invention is to provide a power tool which provides an improved power tool in which damage to components of the power tool due to blank tool impact can be reduced.

[0005] This object is achieved by a power tool, in particular a rotary hammer or a combination hammer, which includes an impact mechanism device for generating an impact pulse on the tool, and the power tool has: a base body, which is used to receive the rear end of the tool; at least one first locking element and a second locking element, each locking element is reversibly arranged in a radial opening of the base body in a locked position or a released position, wherein in the locked position, the rear end of the tool is retained in the base body, and in the released position, the rear end of the tool can be removed from the base body; a locking ring, which is used to retain at least the first locking element and the second locking element in the locked position; and a pressing element, which is used to guide at least the first locking element and the second locking element along a first axial direction and a second axial direction.

[0006] According to the invention, it is provided that the pressing element is at least partially made of an elastic material. In this way, vibrations on the parts of the tool assembly generated by the impact of the blank tool can be damped. Due to the damped vibrations, the parts of the tool assembly are less stressed.

[0007] According to an advantageous embodiment of the invention, the pressure element can comprise at least one first receiving area for at least partially receiving at least the first locking element and the second locking element. This allows for an effective vibration transfer from the locking element to the vibration-absorbing pressure element.

[0008] According to another advantageous embodiment of the invention, the pressing element can comprise at least one connecting element for rotationally fixedly connecting the pressing element to the actuating cap.The non-rotating connection can prevent an unwanted rotation of the pressing element relative to the locking element.

[0009] According to an advantageous embodiment of the invention, at least one receiving area of ​​the pressing element can include a retaining device for repeatedly releasably retaining at least the first locking element and the second locking element in the receiving area. In this way, the corresponding locking element can be repeatedly releasably connected to the pressing element in a simple manner.

[0010] According to another advantageous embodiment of the invention, the retaining device can be designed in the form of a first elastically deformable lip element and a second elastically deformable lip element, wherein the respective freely movable ends of the first lip element and the second lip element are aligned with each other so that at least the first locking element and the second locking element can be at least partially received in at least one receiving area through the cutout between the first lip element and the second lip element. Thus, the locking element and the pressing element can be firmly connected to each other to a certain extent. It can therefore be ensured that the locking element is pulled by the pressing element when the pressing element moves in the axial direction.

[0011] According to an advantageous embodiment of the invention, at least one receiving area of ​​the pressing element can contain spring means for exerting a force on at least one pawl element in a first axial direction. In this way, the pressing element helps to move the first locking element and the second locking element back from the release position to the locking position.

[0012] According to a further advantageous embodiment of the invention, the spring means can be designed in the form of a protuberance which is elastically deformable in the first axial direction.

[0013] Further advantages will become apparent from the following description of the drawings. Various exemplary embodiments of the present invention are shown in the drawings. The drawings, the description and the claims contain many combined features. It will also be convenient for those skilled in the art to consider these features individually and combine them to form useful further combinations. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In the accompanying drawings, the same and similar parts are represented by the same reference numerals. In the accompanying drawings:

[0015] Figure 1 shows a schematic side view of a power tool in the form of a rotary hammer;

[0016] Figure 2 A lateral cross-sectional view of an actuating cap, a first locking element and a second locking element, a base body, a tool and a pressing element according to a first embodiment is shown;

[0017] Figure 3 Detailed views of the base body, locking element, locking ring and pressing element are shown;

[0018] Figure 4a shows a first perspective view of a pressing element according to a first embodiment;

[0019] Figure 4b shows a second perspective view of the pressing element according to the first embodiment;

[0020] Figure 5 A front cross-sectional view of an actuating cap, a first locking element and a second locking element, a base, a tool and a pressing element according to a first embodiment is shown;

[0021] Figure 6 shows a perspective view of a locking element according to a first embodiment;

[0022] Figure 7a A first perspective view of an actuator cap is shown;

[0023] Figure 7b shows a second perspective view of the actuator cap;

[0024] Figure 8A rear perspective view of the locking ring is shown;

[0025] Fig. 9 shows a front perspective view of a base body according to a first embodiment;

[0026] Fig.10 A lateral cross-sectional view of an actuating cap, a first locking element, a second locking element, a base body, a tool, and a pressing element according to a second embodiment is shown;

[0027] Fig.11 shows a plan view of a base body, a locking ring, a first locking element, and a pressing element according to a second embodiment;

[0028] Fig.12a A lateral cross-sectional view of a base body, a locking ring, a first locking element, a second locking element, and a pressing element according to a second embodiment is shown, wherein the locking element is in a first position;

[0029] Figure 12b A lateral cross-sectional view of a base body, a locking ring, a first locking element, a second locking element, and a pressing element according to a second embodiment is shown, wherein the locking element is in a second position;

[0030] Fig.12c A lateral cross-sectional view of a base body, a locking ring, a first locking element, a second locking element, and a pressing element according to a second embodiment is shown, wherein the locking element is in a third position;

[0031] Fig.13a A front perspective view of a pressing element in a second embodiment is shown;

[0032] Fig.13b A rear perspective view of a pressing element in a second embodiment is shown;

[0033] Fig.14a shows a front perspective view of an actuator cap according to a second embodiment;

[0034] Fig.14b shows a rear perspective view of an actuator cap according to a second embodiment;

[0035] Fig.15a A front perspective view of a locking ring is shown;

[0036] Fig.15b A rear perspective view of the locking ring is shown;

[0037] Fig.16a shows a first perspective view of a locking element according to a second embodiment;

[0038] Fig.16b shows a second perspective view of a locking element according to a second embodiment;

[0039] Fig.17 shows a front perspective view of a base body according to a second embodiment;

[0040] Fig.18 A front cross-sectional view of an actuating cap, a first locking element, a second locking element, a base, a tool, and a pressing element according to a second embodiment is shown;

[0041] Fig.19a shows a front perspective view of a pressing element according to a third embodiment;

[0042] Fig.19b shows a rear perspective view of a pressing element according to a third embodiment;

[0043] Fig. 20 A plan view showing a base body, a first locking element, a locking ring, and a pressing element according to a third embodiment;

[0044] Fig.21 A cross-sectional view of a base body, a first locking element, a locking ring and a pressing element according to a third embodiment is shown;

[0045] Fig. 22 A front cross-sectional view of an actuating cap, a first locking element and a second locking element, a base, a tool and a pressing element according to a third embodiment is shown;

[0046] Fig.23a shows a first perspective view of a locking element according to a third embodiment;

[0047] Figure 23b shows a second perspective view of a locking element according to a third embodiment;

[0048] Fig.24a A lateral cross-sectional view of a base body, a locking ring, a first locking element, a second locking element, and a pressing element according to a third embodiment is shown, wherein the locking element is in a first position;

[0049] Figure 24b shows a lateral cross-sectional view of a base body, a locking ring, a first locking element, a second locking element and a pressing element according to a third embodiment, wherein the locking element is in a second position; and

[0050] Fig.24c A lateral cross-sectional view of a basic body, a locking ring, a first locking element and a second locking element and a pressing element according to a third embodiment is shown, wherein the locking element is in a third position. DETAILED DESCRIPTION

[0051] Figure 1 and Figure 2The power tool 1 is shown in the form of a rotary hammer. However, the power tool 1 may also be a hammer drill, a combination hammer or the like.

[0052] The power tool 1 basically comprises a tool housing 2, a handle 3, a tool assembly device 4 and a power source 5. The tool assembly device 4 is used to receive and hold a tool 6. The tool 6 is designed as a chisel in the figure and comprises a front end 6a and a rear end 6b. The rear end 6b of the tool designed as a chisel is intended to be inserted into the tool assembly device 4. The handle 3 is used to hold and guide the power tool 1. The power source 5 is used to provide electrical energy to the power tool 1 and is designed as a power cable in the present exemplary embodiment. The power source 5 designed as a power cable can be connected to a mains power supply (also called a socket). According to an alternative embodiment not shown in the figure, the power source 5 can also be designed as a battery, which can be releasably connected to the power tool 1 via a corresponding battery interface.

[0053] The interior of the tool housing 2 basically contains a drive device 7, an impact mechanism device 8, a transmission device 9 and a control device 10. Figure 1 As shown, the drive device 7 is connected to the impact mechanism device 8 via a transmission device 9 in such a way that the torque generated by the drive device 7 can be transmitted to the impact mechanism device 8. Due to the torque transmitted from the drive device 7 to the impact mechanism device 8, the impact mechanism device 8 can generate an impact pulse. Figure 1 As further shown, the impact mechanism device 8 is connected to the tool mounting device 4 in such a way that an impact pulse is transmitted to the tool 6 positioned in the tool mounting device 4 .

[0054] The drive device 7 is designed here as an electric motor, in particular as a brushless electric motor.

[0055] The tool housing 2 has a front end 2a and a rear end 2b. A tool fitting device 4 is located at the front end 2a, and a handle 3 is located at the rear end 2b.

[0056] like Figure 2 As shown, the tool fitting device 4 in turn substantially comprises an actuating cap 11 , an elongated basic body 12 , a locking ring 13 , a first locking element 14 and a second locking element 15 and a pressing element 16 .

[0057] The actuating cap 11 is designed essentially as a conical or tapered sleeve comprising a first end 11 a and a second end 11 b .

[0058] exist Figure 7a and Figure 7b , an actuating cap 11 in a first embodiment is shown. Fig.14a and Fig.14b An actuating cap 11 is shown in a second embodiment.

[0059] The actuation cap 11 according to the first embodiment and the second embodiment has a step 11d on the inner side surface 11c. As will be described in detail later, the step 11d serves as a contact surface or a support surface for the pressing member 16.

[0060] The elongated base body 12 is used to receive the rear end 6b of the tool 6 configured as a chisel. As will be described in detail below, the base body 12 is further used to receive a locking ring 13, a first locking element 14 and a second locking element 15 and a pressing element 16. The base body 12 is substantially designed in the form of a tube having a first section 12a and a second section 12b. The first section 12a and the second section 12b each comprise a first end and a second end. The first section 12a has a smaller outer diameter and an inner diameter than the second section 12b. The first end of the first section 12a forms the front end of the base body 12. The second end of the first section 12a is connected to the first end of the second section 12b. The second end of the second section 12b in turn forms the rear end of the base body 12. A first radial opening 17a and a second radial opening 17b are present on the first section 12a of the base body 12. The first radial opening 17a and the second radial opening 17b are elongated in form and are positioned opposite to each other.

[0061] exist Fig. 9 , the base body 12 in the first embodiment is shown. Fig.17 The actuating cap 11 is shown in a second embodiment. The base body 12 according to the first and second embodiments differs substantially in that the base body 12 comprises an annular toothing 18 at the rear end. The toothing 18 serves to rotationally fix the base body 12 to the housing of the impact mechanism device 8 .

[0062] The first locking element 14 and the second locking element 15 have a substantially cuboidal body with a front end 19a, a rear end 19b, an upper end 19c and a lower end 19d. The locking elements 14, 15 are used to repeatedly releasably connect the body 12 to the rear end 6b of the tool 6 when the rear end 6b of the tool 6 is located in the tool assembly device 4.

[0063] exist Figure 6 In FIG. 1 , locking elements 14 , 15 are shown in a first embodiment. Fig.16a and Fig.16b A second embodiment of the locking elements 14, 15 is shown. Fig.23a and Figure 23b , locking elements 14, 15 in a third embodiment are shown.

[0064] The locking elements 14 , 15 can also be referred to as detents and serve to connect the tool 6 to the basic body 12 in a releasable manner.

[0065] Figure 6The locking elements 14, 15 shown comprise at the upper end three steps 20 ascending in direction A. The first locking element 14 and the second locking element 15 are identical to each other.

[0066] According to the second embodiment Fig.16a and Fig.16b The locking elements 14, 15 shown in the figure have a substantially flat basic shape. At the front end 19a, the locking elements 14, 15 according to the second embodiment include a flat contact surface 21. At the rear end 19b, the locking elements 14, 15 each include a recess 22 on the left and right surfaces. The recess 22 can also be called a groove or a cutout. As will be described in detail later, these recesses 22 are used to establish a repeatedly releasable connection with the pressing element 16.

[0067] According to the third embodiment Fig.23a and Figure 23b The locking elements 14, 15 shown in the figure correspond substantially to the locking elements 14, 15 according to the second embodiment, because they also have a flat basic shape. At the front end 19a, the locking elements 14, 15 according to the third embodiment also include a flat contact surface 21. At the rear end 19b, the locking elements 14, 15 also each include a depression 22 on the left and right surfaces. Compared with the locking elements 14, 15 according to the second embodiment, the locking elements 14, 15 according to the third embodiment include a protuberance 23 extending perpendicularly to the longitudinal extent of the basic shape of the locking elements 14, 15. In addition to the depression 22 on the right and left surfaces, the protuberance 23 is used to improve the connection of the locking elements 14, 15 with the pressing element 16.

[0068] The locking ring 13 is designed essentially as a sleeve and serves essentially to fix the first locking element 14 and the second locking element 15 in a locking position in which the tool 6 is held in the basic body by means of the locking elements 14 , 15 .

[0069] Figure 8 The locking ring 13 in the first embodiment is shown. The inner side surface 13a of the locking ring 13 according to the first embodiment is likewise designed in a stepped manner and corresponds to the upper ends 19c of the first locking element 14 and the second locking element 15 according to the first embodiment.

[0070] exist Fig.15a and Fig.15b , a locking ring 13 in a second embodiment is shown. The locking ring 13 according to the second embodiment has a flat surface on the inner side surface 13a. The angle of the flat surface corresponds to the angle of the flat contact surface 21 at the front end 19a of the locking element 14, 15 according to the second embodiment.

[0071] In all embodiments, the pressing element 16 is basically designed as a ring made of an elastic material. Here, the pressing element 16 designed as a ring is completely or at least partially made of an elastic material. The elastic material can be an elastomer or rubber. Figure 4a and Figure 4b The pressing element 16 shown in the figure is annular in form and has a first surface side 16a and a second surface side 16b. On the first surface side 16a, a first notch 24a and a second notch 24b are provided, which are positioned opposite to each other and extend radially over the entire first surface side 16a. The notches 24a, 24b can also be referred to as grooves. An annular groove 25 is provided on the second surface side 16b.

[0072] According to the second embodiment Fig.13a and Fig.13b The pressing element 16 shown in the figure is likewise annular in form and also comprises a first surface side 16a and a second surface side 16b. The first notch 24a and the second notch 24b are arranged on the first surface side 16a opposite to each other. The first notch 24a and the second notch 24b, which can each also be referred to as a groove, extend in the radial direction. The notches 24a, 24b serve as receiving areas for the respective rear ends 19b of the locking elements 14, 15. In each of the first notch 24a and the second notch 24b, there is a protuberance 26. When the rear ends 19b of the locking elements 14, 15 are located in the notches 24a, 24b of the pressing element 16, the protuberance 26 serves as a spring device to press the locking elements 14, 15 in direction B. As shown in FIG. Fig.11 and Fig.13b As shown, the ridges 26 in the first cutout 24a and the second cutout 24b extend only to half the height of the cutouts 24a, 24b in the axial direction B. In other words: the ridges 26 are half the height of the cutouts 24a, 24b. Fig.11 , Fig.13a and Fig.13b As shown, the first elastically deformable lip element, the second elastically deformable lip element 27 protrudes above the cutout 24a, 24b from the left and right side of the cutout 24a, 24b in each case. The first elastically deformable lip element, the second elastically deformable lip element 27 can be referred to as a lip or a retaining device. The length of the first elastically deformable lip element, the second elastically deformable lip element 27 is selected here so that an opening is formed between the free ends of the first elastically deformable lip element, the second elastically deformable lip element 27. As described in detail below, the first elastically deformable lip element, the second elastically deformable lip element 27 serves as a retaining device for the locking elements 14, 15 on the pressing element 16.

[0073] In addition, there are two connection elements 28 in the form of ridges on the first surface side. The connection elements 28 are arranged opposite to each other and are positioned 90° offset from the two cutouts 24a, 24b. The connection elements 28 serve to rotationally fix the pressing element 16 to the actuating cap 11. On the second surface side 16b of the pressing element 16, two annular steps 28a, 28b are provided.

[0074] According to the third embodiment Fig.19a and Fig.19b The pressing element 16 shown in the third embodiment is also annular in form and further includes a first surface side 16a and a second surface side 16b. The design of the pressing element 16 according to the third embodiment is substantially the same as that of the pressing element 16 according to the second embodiment. Unlike the second embodiment, in the pressing element 16 according to the third embodiment, the first elastically deformable lip element and the second elastically deformable lip element 27 of the two cutouts 24a, 24b are made longer, so that the corresponding free ends of the first elastically deformable lip element and the second elastically deformable lip element 27 almost close the cutouts 24a, 24b, and there is almost no opening between the free ends of the first elastically deformable lip element and the second elastically deformable lip element 27 above the corresponding cutouts 24a, 24b. In addition, according to the third embodiment, the pressing element 16 does not include any ridges 26 in the two cutouts 24a, 24b.

[0075] exist Figure 2 , Figure 3 and Figure 5 , the front part of the tool assembly device 4 or the power tool 1 according to the first embodiment is shown in an assembled state. To this end, the first locking element 14 is positioned in the first radial opening 17a of the base body 12, and the second locking element 15 is positioned in the second radial opening 17b of the base body 12. As will be described in detail below, the two locking elements 14, 15 can each be positioned in a locked position or a released position.

[0076] The locking ring 13 is positioned above the base body 12 and is arranged behind the locking elements 14, 15 in direction B. Figure 2 As can be seen in the figure, the inner side surface 13a of the locking ring 13 according to the first embodiment is designed to be stepped, so it corresponds to the stepped upper end 19c of the locking elements 14, 15. In other words: the upper end 19c of the locking elements 14, 15 matches the inner side surface 13a of the locking ring 13 in terms of its configuration.

[0077] In addition, the pressing element 16 is also positioned above the base body 12. The pressing element 16 is arranged in front of the locking elements 14, 15 in the direction B. Figure 2 and Figure 3As can be seen in FIG. 1 , the rear ends 19b of the corresponding first locking element 14 and the second locking element 15 are located in the cutouts 24a, 24b of the pressing element 16. Figure 2 and Figure 3 As can be seen in FIG. 1 , the helical spring 29 is positioned behind the pressing element 16 in direction B. The helical spring 29 can also be referred to as a spring or a spring element. The helical spring 29 presses on the pressing element 16 in direction B. Therefore, the pressing element 16 presses on the locking elements 14 , 15 .

[0078] The actuating cap 11 according to the first embodiment is also arranged above the base body 12. Figure 2 As shown, the actuator cap 11 has a conical design and has a step 11d in the inner surface 11c. Figure 7a The actuating cap 11 is positioned so that the front portion of the actuating cap is located between the locking ring 13 and the pressing element 16. The step 11d rests on the rear end 19b of the corresponding locking element 14,15.

[0079] Figure 2 The first locking element 14 and the second locking element 15 are shown in a locked position when the rear end 6b of the tool 6 designed as a chisel is to be held in the tool assembly device 4. When the actuating cap 11 is pressed in the direction A, the step 11d on the inner side surface 11c of the actuating cap 11 presses the first locking element 14 and the second locking element 15 and the pressing element 16 in the direction A against the spring force of the spiral spring 29. Due to the fact that the first radial opening 17a, the second radial opening 17b on the base body 12 are designed as oblong holes, the locking elements 14, 15 can be displaced in the axial direction A or B without the locking elements 14, 15 moving in the radial direction. When the locking elements 14, 15 are no longer engaged with the locking ring 13, the locking elements 14, 15 can eventually move in the radial direction. When the two locking elements 14, 15 have moved in the radial direction, the two locking elements 14, 15 are no longer in the locked position, but in the released position. In the release position, the rear end 6 b of the tool 6 designed as a chisel is no longer held in the tool fitting device 4 by the locking elements 14 , 15 and the tool 6 can be removed in direction B from the tool fitting device 4 .

[0080] exist Fig.10 , Fig.11 , Fig.12a , Figure 12b and Fig.12c , the front part of the tool assembly device 4 or the power tool 1 according to the second embodiment is shown in an assembled state. The front part of the tool assembly device 4 or the power tool 1 according to the second embodiment substantially corresponds to the front part of the tool assembly device 4 or the power tool 1 according to the first embodiment.

[0081] Fig.10 , Fig.11 and Figure 12b The first locking element 14 and the second locking element 15 are shown in a locked position when the rear end 6b of the tool 6 designed as a chisel is to be held in the tool assembly device 4. Here, the first locking element 14 and the second locking element 15 are positioned in such a way that the flat contact surface 21 at the front end 19a of the locking elements 14, 15 rests on a flat plane on the inner side surface 13a of the locking ring 13. The coil spring 29 presses the pressing element 16 onto the locking elements 14, 15 in the direction B and thus presses the locking elements 14, 15 against the locking ring 13. When the actuating cap 11 is pushed in the direction A, the step 11d on the inner side surface 11c of the actuating cap 11 presses on the pressing element 16 as a contact surface and presses the pressing element 16 in the A direction against the spring force of the coil spring 29. As shown in Fig.11 As can be seen in FIG. 1 , the rear end 19b of the locking element 14, 15 is positioned in the cutout 24a, 24b of the pressing element 16 (according to the second embodiment) in such a way that the first elastically deformable lip element, the second elastically deformable lip element 27 at the cutout 24a, 24b each engages in one of the recesses 22 on the left and right side surfaces of the locking element 14, 15. This forms a form-fit connection between the pressing element 16 and the locking element 14, 15. Here, the material of the pressing element 16 is selected so that, on the one hand, the first elastically deformable lip element, the second elastically deformable lip element 27 is at least flexible or movable so that the rear end 19b of the locking element 14, 15 can pass through the first elastically deformable lip element, the second elastically deformable lip element 27 into the cutout 24a, 24b of the pressing element 16. On the other hand, the material must be selected so that the first elastically deformable lip element, the second elastically deformable lip element 27 at least provides a resistance, so that the rear end 19b of the locking elements 14, 15 can be pulled again through the two first elastically deformable lip elements, the second elastically deformable lip element 27 and out of the cutouts 24a, 24b of the pressing element 16 only with a relatively high expenditure of force. When the pressing element 16 is pressed in the direction A, the pressing element 16 can also pull the first locking element 14 and the second locking element 15 in the direction A. When the first locking element 14 and the second locking element 15 are moved in the direction A, the two locking elements 14, 15 are no longer engaged with the locking ring 13, so that the locking elements 14, 15 can be moved in the radial direction from the rear end 6b of the insertion tool 6, with reference to FIG. Fig.12c When the two locking elements 14 , 15 have been moved in the radial direction, the two locking elements 14 , 15 are located in the release position, so that the tool 6 can be removed from the tool fitting device 4 .

[0082] exist Fig. 20 , Fig.21 , Fig. 22 , Fig.24a , Figure 24b and Fig.24c , the front part of the tool assembly device 4 or the power tool 1 according to the third embodiment is shown in an assembled state. The front part of the tool assembly device 4 or the power tool 1 according to the third embodiment substantially corresponds to the front part of the tool assembly device 4 or the power tool 1 according to the second embodiment. In both the tool assembly devices 4 according to the second embodiment and the third embodiment, the operating mode of moving the locking elements 14, 15 from the locking position to the release position is the same.

[0083] As described above, the first locking element 14 and the second locking element 15 according to the third embodiment have a protuberance 23 at the rear end 19b. The protuberance 23 is used to ensure an improved attachment or a better form-fitting connection of the locking elements 14, 15 with the pressing element 16. Fig. 20 and Fig.21 As can be seen in the figure, the upper or free end of the protuberance 23 protrudes in the radial direction in the cutouts 24a, 24b of the pressing element 16 at the rear end 19b of the locking element 14, 15. As a result, a larger part of the rear end 19b of the locking element 14, 15 is located in the cutouts 24a, 24b of the pressing element 16, so that a correspondingly higher expenditure of force is required in order to pull the rear end 19b of the locking element 14, 15 through the first elastically deformable lip element, the second elastically deformable lip element 27 and out of the cutouts 24a, 24b of the pressing element 16. As a result, the form-fit connection between the locking element 14, 15 and the pressing element 16 is improved.

Claims

1. A power tool (1) comprising an impact mechanism device (8) for generating an impact pulse on the tool (6), characterized in that The power tool has: a base (12) for receiving the rear end of the tool, at least one first locking element and a second locking element (14, 15), each locking element being reversibly arranged to be located in a radial opening of the base body (12) in a locking position or in a release position, wherein in the locking position the rear end (6b) of the tool (6) is retained in the base body (12), and in the release position the rear end (6b) of the tool (6) can be removed from the base body (12); a locking ring (13) for holding the at least first and second locking elements (14, 15) in the locked position, and A pressing element (16) for guiding the at least first locking element and the second locking element (14, 15) in a first axial direction and a second axial direction The pressing element (16) is at least partially made of elastic material and comprises at least one receiving area, wherein a first notch and a second notch (24a, 24b) serve as receiving areas for receiving rear ends (19b) of at least the first locking element and the second locking element (14, 15), wherein the rear ends (19b) of at least the first locking element and the second locking element (14, 15) are positioned in the first notch and the second notch (24a, 24b) positioned opposite to each other on a first surface side (16a) of the pressing element (16).

2. The power tool (1) according to claim 1, It is characterized in that The pressing element (16) comprises at least one connecting element (28) for connecting the pressing element to the actuating cap (11) in a rotationally fixed manner.

3. The power tool (1) according to claim 1 or 2, It is characterized in that At least one receiving area of ​​the pressing element (16) comprises a retaining device for retaining the at least first and second locking elements (14, 15) in the at least one receiving area in a releasable manner.

4. The power tool (1) according to claim 3, It is characterized in that The retaining device is designed in the form of a first elastically deformable lip element and a second elastically deformable lip element (27), wherein the corresponding freely movable ends of the first elastically deformable lip element and the second elastically deformable lip element (27) are aligned with each other so that through the opening (30) between the first elastically deformable lip element and the second elastically deformable lip element (27), the at least first locking element and the second locking element (14, 15) can be at least partially received in the at least one receiving area.

5. The power tool (1) according to claim 1 or 2, It is characterized in that At least one receiving area of ​​the pressure element (16) comprises a spring device for applying a force to the at least first and second locking elements (14, 15) in a first axial direction (B).

6. The power tool (1) according to claim 5, It is characterized in that The spring device is designed in the form of a protuberance (26) which is elastically deformable in a first axial direction (B).

7. The power tool (1) according to claim 1, It is characterized in that The power tool (1) is a rotary hammer or a combination hammer.

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