Abstract
A handheld electric power tool that is adapted to be driven in oscillation, the handheld electric power tool having a housing and a drive arranged in the housing for driving a toolholder, which is arranged on a tool shaft coupled to the drive and on which a tool is detachably installed. The tool shaft is accommodated in an output unit, which includes a gearhead accommodated in a gearhead housing, and a collar, which is designed so as to make possible a tool-free seating of an attachment in an installation direction oriented parallel to a longitudinal axis of the gearhead, is formed on the output unit.
Claims
1. A handheld electric power tool that is adapted to be driven in oscillation, the handheld electric power tool comprising: a housing; and a drive arranged in the housing for driving a toolholder, which is arranged on a tool shaft coupled to the drive and on which a tool is detachably installed, wherein the tool shaft is accommodated in an output unit, which includes a gearhead accommodated in a gearhead housing, and wherein a collar, which is designed so as to make possible a tool-free seating of an attachment in an installation direction oriented parallel to a longitudinal axis of the gearhead, is formed on the output unit.
2. The handheld electric power tool according to claim 1, wherein the collar is associated with the gearhead or the gearhead housing.
3. The handheld electric power tool according to claim 1, wherein the collar is formed as a single piece with the gearhead or the gearhead housing.
4. The handheld electric power tool according to claim 1, wherein the collar has a cylindrical cross section.
5. The handheld electric power tool according to claim 1, wherein the collar is delimited at its end pointing toward the toolholder by a collet.
6. The handheld electric power tool according to claim 5, wherein at least one recess is formed on the collet to produce an encoding.
7. The handheld electric power tool according to claim 6, wherein the at least one recess is provided in multiple instances.
8. The handheld electric power tool according to claim 6, wherein the number of recesses is 2 or more, greater than 4 or more, greater than 6 or more, 14 or fewer, 12 or fewer, 10 or fewer, or is 8.
9. The handheld electric power tool according to claim 6, wherein an angular range of the total of the recesses is between 40° and 90°, or is 60°.
10. The handheld electric power tool according to claim 6, wherein the encoding has mirror-image symmetry about a plane of symmetry that is spanned by a housing longitudinal axis of the housing and the longitudinal axis of the gearhead.
11. The handheld electric power tool according to claim 10, wherein at least one of the recesses is intersected by the plane of symmetry.
12. The handheld electric power tool according to claim 6, wherein the encoding produced by the at least one recess is designed such that a placement of an attachment only takes place in a position that is not normally employed for use of the attachment.
13. The handheld electric power tool according to claim 1, wherein the end of the collar pointing away from the toolholder is delimited by an annular band.
14. The handheld electric power tool according to claim 1, wherein detent seats are formed in the collar.
15. The handheld electric power tool according to claim 1, wherein an auxiliary ring with which an attachment is connected in a rotationally fixed manner, is associated with the collar in a freely rotatable and axially fixed manner.
16. The handheld electric power tool according to claim 15, wherein the auxiliary ring has a radial opening.
17. The handheld electric power tool according to claim 15, wherein at least one radial projection is associated with the auxiliary ring on its end pointing toward the toolholder.
18. The handheld electric power tool according to claim 15, wherein at least one detent lug is associated with the auxiliary ring.
19. The handheld electric power tool according to claim 15, wherein an annular shoulder is associated with the auxiliary ring on its end pointing away from the toolholder.
20. The handheld electric power tool according to claim 19, wherein the annular shoulder at least partially covers the annular band.
21. A combination of a handheld electric power tool according to claim 1 and an attachment that is detachably accommodated on the collar of the gearhead housing, wherein the attachment has a hollow cylindrical mounting section that is adapted to be coupled to the collar.
22. The combination according to claim 21, wherein a plurality of projections for interaction with the recesses of the collar, a plurality of locking gates for interaction with the radial projections formed on the auxiliary ring, or detent openings for interaction with the detent lugs formed on the auxiliary ring are formed on an inner side of the hollow cylindrical mounting section.
23. The combination according to claim 21, wherein the attachment is a suction device, a depth stop, or a table support.
Description
BRIEF DESCRIPTION OF THE DRAWINGS
[0030] The present invention will become more fully understood from the detailed description given hereinbelow and the accompanying drawings which are given by way of illustration only, and thus, are not limitive of the present invention, and wherein:
[0031] FIG. 1 shows a perspective view of a handheld electric power tool,
[0032] FIG. 2 shows a plan view from below of the handheld electric power tool from FIG. 1,
[0033] FIG. 3 shows a perspective view of a suction device,
[0034] FIG. 4 shows a perspective view of a suction device,
[0035] FIG. 5 shows a perspective view of a suction device,
[0036] FIG. 6 shows a perspective view of a suction device,
[0037] FIG. 7 shows a side view of a handheld electric power tool with the installed suction device according to the example from FIG. 6,
[0038] FIG. 8 shows a perspective view of a depth stop,
[0039] FIG. 9 shows a perspective view of a depth stop, and
[0040] FIG. 10 shows a perspective view of the suction device according to the example from FIG. 3, which is mounted on the handheld electric power tool.
DETAILED DESCRIPTION
[0041] Shown in FIG. 1 in a perspective view is a handheld electric power tool 1 according to the invention, which can be driven in oscillation. This power tool has a housing 2, in which is accommodated a drive (not shown in the drawing) with which a toolholder 3 can be driven in oscillation by means of a tool shaft. The drive and the tool shaft are oriented perpendicular to one another in this case. A tool 4 can be detachably installed on the toolholder 3 here, as is evident from FIGS. 7 and 10, for example. The tool shaft is accommodated here in a gearhead 5, which is enclosed by a gearhead housing 6. These components are part of an output unit 20 here. The gearhead housing 6 in this case is formed as a single piece with a collar 7, which is designed so as to make possible a tool-free seating of an attachment 8, namely in an installation direction oriented parallel to a longitudinal axis 9 of the gearhead 5. The collar 7 in this case is delimited at its end pointing away from the toolholder 3 by an annular band 10 and at its end pointing toward the toolholder 3 by a collet 11, wherein multiple recesses 12 are formed on this collet 11, by which means an encoding 13 is created. It is ensured by means of this encoding 13 that the attachment 8 can only be in placed on the collar 7 and removed from it again in a certain position. In order to prevent unintentional detachment of the attachment 8, the recesses 13 are designed here such that a placing of an attachment 8 can only take place in a position that is not normally employed for use of the attachment 8. In the exemplary embodiment shown, a total of 8 recesses 12 are provided, wherein the angular range of the total of the recesses 12 is approximately 60°. In addition, detent seats 14 in which a locking device 415, 515 of an attachment 8 can engage are formed on the annular shoulder 10 in order to define the rotational position of the attachment on the collar 7.
[0042] Evident in the bottom view of the handheld electric power tool 1 shown in FIG. 2, in addition to the toolholder 3, is that the collar 7 has a cylindrical cross section. Moreover, it can also be seen in this diagram that the recesses 13 have mirror-image symmetry about a plane of symmetry 16 that is spanned by a housing longitudinal axis 19 of the housing 2 and the longitudinal axis 9 of the gearhead 5. Furthermore, it is also evident here that at least one of the recesses 12 is intersected by the plane of symmetry 16. The recesses 12 are arranged here such that an attachment 8 can only be in placed on the collar 7 at an angle of approximately 45° relative to the housing longitudinal axis 19.
[0043] In FIG. 3, a first embodiment of a suction device 100 is shown that constitutes an attachment 8. In addition to an air inlet 118 and an air outlet 119, this suction device 100 has a hollow cylindrical mounting section 120 that the air inlet 118 opens into. In the first embodiment of the suction device 100, an encoding region 122 is formed on the inner side 121 of the hollow cylindrical mounting section 120 that is used for installation of the suction device 100 on the handheld electric power tool 1. This encoding region 122, which includes a number of projections 123, has the result that the suction device 100 can only be placed on the collar 7 of the handheld electric power tool 1 in a single position, namely only when the projections 123 of the encoding region 122 are aligned with corresponding recesses 12 that are formed on the collar 7 of the handheld electric power tool 1.
[0044] Visible in FIG. 4, in addition to the second embodiment of the suction device 200, is also an auxiliary ring 225, which can be placed in a freely rotatable manner on the collar 7 between the annular band 10 and the collet 11. For this purpose, the auxiliary ring 225 has a radial opening 226, by which means the auxiliary ring 225 can be slightly expanded by the user and placed on the collar 7 over the annular band 10. In order to mount the suction device 200 on the auxiliary ring 225, a total of 6 radial projections 227 are formed on the outer circumferential side on the end of the auxiliary ring 225 pointing toward the toolholder 3. Locking gates 228, which are formed on a mounting section 220 of the suction device 200, can engage in these radial projections 227 in order to connect the suction device 224 to the auxiliary ring 225 in a rotationally fixed manner. In the exemplary embodiment shown, an annular shoulder 229, which at least partially covers the annular band 10 that delimits the collar 7 axially to the rear, is associated with the auxiliary ring 225 on its end pointing away from the toolholder 3.
[0045] In FIG. 5, an auxiliary ring 325 is likewise provided in addition to the third embodiment of the suction device 300. In this case, this ring has two detent lugs 330, which engage in detent openings 331 that are formed in the suction device 324 when the suction device 300 is placed on the auxiliary ring 325 that was mounted on the collar 7 beforehand.
[0046] FIG. 6 shows, likewise in a perspective view, a fourth embodiment of the suction device 400, which represents an attachment 8 for a handheld electric power tool 1 that can be driven in oscillation. The suction device 400 according to the fourth embodiment has, in this case, a body 432, in which is formed an air duct 433, which is delimited at one end by an air inlet 418 and at the other end by an air outlet 419. Additionally formed on the body 432 is a mounting section 420, by means of which the suction device 400 can be mounted on the collar 7 of the handheld electric power tool 1. The mounting section 420 is designed as essentially a hollow cylinder here, as well, and has on its inner side 421 an encoding region 422 with a number of projections 423, which is used for installation of the suction device 400 on the collar 7 of the handheld electric power tool 1. Formed on the mounting section 420 in the exemplary embodiment shown is a locking device 415, with which it is possible for the user to lock the suction device 400 on the detent seats 14 of the collar 7, which is to say, in particular, to define their rotational position relative to the collar 7. The locking device 415 in this design is supported on the body 432 such that it can swivel about a swivel axis 435 in opposition to the force of a return spring 434. In addition, the air outlet 419 is supported on the body 432 such that it can pivot to a limited extent in order to provide the user with additional adjustment options.
[0047] FIG. 7 shows, in a side view, the handheld electric power tool 1 with the fourth embodiment of the suction device 400 mounted thereon. Mounted on the toolholder 3 in this case is a saw blade 17 serving as the tool 4.
[0048] FIGS. 8 and 9 show two depth stops 500, which likewise serve as attachments 8. Common to both depth stops 500 is that they each have a mounting section 520, on which are likewise formed projections 523 that constitute an encoding region 522, and with which the depth stops 500 can be mounted on the collar 7 of the handheld electric power tool 1 through the encoding 13. The depth stop 500 that is shown in FIG. 8 is usually used in combination with a saw blade 17 designed as a plunge cut saw blade, whereas the depth stop 500 shown in FIG. 9 is used with a saw blade 17 in the manner of a circular saw. The two depth stops 500 each have a locking device 515, with which their rotational position on the collar 7 can be defined.
[0049] In the case of the handheld electric power tool 1 shown in FIG. 10, the attachment 8, which is designed as a suction device 100, is mounted on the collar 7 by means of the encoding 13 and the corresponding encoding region 122, and serves to draw off the dusts and chips produced during use of the tool 4, which in the exemplary embodiment shown is designed as an abrasive plate 18.
[0050] The invention being thus described, it will be obvious that the same may be varied in many ways. Such variations are not to be regarded as a departure from the spirit and scope of the invention, and all such modifications as would be obvious to one skilled in the art are to be included within the scope of the following claims.
