CN104057414A - Hand-held Machine Tool Provided With Machine Tool Accommodating Device Comprising Polygonal Inner Accommodating Device And Polygonal Outer Accommodating Device - Google Patents

Abstract

The invention relates to a hand-held power tool with an output shaft (124) on which a tool holder (150) with a polygonal inner receptacle (290) and a polygonal outer receptacle (210) is arranged, the The tool holder has at least one through-opening (325), through which a locking element (360) engages in the polygonal inner holder (290) in an associated locking position in order to lock the To lock the plug-in tool (410) in the polygonal inner receiving device (290), in order to fix the locking element (360) in the at least one through opening (325), at least one elastically at least partially A deformed fixing piece (350), the fixing piece is arranged on the polygonal outer containing device (210) in an axially non-movable manner and without relative rotation.

Description

Hand-held power tool with a machine tool receptacle comprising a polygonal inner receptacle and a polygonal outer receptacle

technical field

The invention relates to a hand-held power tool with a driven shaft on which a tool holder with a polygonal inner receptacle and a polygonal outer receptacle is arranged, the tool holder having at least one through-opening, locking In an associated locking position, the element engages through the through-opening into the polygonal inner receptacle in order to lock a plug-in tool arranged in the polygonal inner receptacle.

Background technique

Document WO 2011/104105 A1 has known such a hand-held power tool configured as a rotary impact driver, which has a tool holder comprising a 28 mm long polygonal inner holder, for example for accommodating screwdriver bits, and an 11.55 mm long Long, polygonal outer housing, eg for housing a socket wrench. Approximately in the middle of the polygonal inner receptacle passing axially through the polygonal outer receptacle, that is to say starting from the free end of the polygonal outer receptacle at intervals of 14 mm, there is a through-opening, the associated locking element is located in a corresponding In the locked position it can fit into the polygonal inner receptacle through the through-opening.

Disadvantageous for this hand-held power tool is that, for example, socket wrenches manufactured according to European or North American industrial standards and which are inserted onto the polygonal outer receptacle, due to the relatively short length of the polygonal outer receptacle of only 11.55 mm, would The machine tool is loose and vibrates during operation. As a result, the socket wrench can be released from the polygonal outer receptacle and therefore cannot be used reliably with the hand-held power tool.

Contents of the invention

It is therefore the object of the present invention to provide a new hand-held power tool with a tool holder comprising a polygonal inner holder and a polygonal outer holder, manufactured according to European or North American industrial standards and plugged into a polygonal The socket wrench on the outer receptacle runs on the tool receptacle in a lockable and operationally reliable manner.

This problem is solved by a hand-held power tool with a driven shaft on which is arranged a tool holder provided with a polygonal inner receptacle and a polygonal outer receptacle, said tool holder having at least one through-opening, the lock In an associated locking position, the locking element engages through the through-opening into the polygonal inner receptacle in order to lock a plug-in tool arranged in the polygonal inner receptacle. In order to fix the locking element in the at least one through-opening, at least one elastically deformable fastening element is provided, which is axially immovable and non-rotatably arranged outside the polygon. on the container.

The present invention thus makes it possible to provide a hand-held power tool in which the outer polygonal receptacle can be extended by fastening the locking element in the region of the outer polygonal receptacle by means of an elastically deformable fastening element. , so that, for example, a socket wrench manufactured according to European or North American industrial standards can also be safely and reliably connected to the polygonal outer receiving device and can be driven.

Preferably, the at least one elastically deformable fastening element is configured in the manner of an elastically deformable C-ring.

A robust and cost-effective fastening can thus be provided.

The at least one elastically deformable fastening part preferably has at least one recess into which the locking element engages at least partially in the associated locking position and in an associated unlocking position. .

A safe and secure fixation of the locking element can thus be achieved both in the locked position and in the unlocked position.

Preferably, the at least one elastically deformable fastening part is designed to bias the locking element into the associated locking position in the unloaded state.

The locking element can thus be loaded into the associated locking position in a simple manner.

According to one embodiment, a locking element is provided which is designed for locking the at least one elastically deformable fastening part at least in places in the unloaded state.

The invention thus achieves the provision of a hand-held power tool in which an unintentional and uncontrolled unlocking of the polygonal inner receptacle of the tool receptacle can be effectively prevented, in particular during operation of the hand-held power tool.

Preferably, the locking element is assigned to an actuating element which, for releasing the at least one at least partially elastically deformable fastening element, is directed apart by means of the locking element against a spring force exerted by an associated spring element. The axial direction of the hand-held power tool is shifted from a locked position into an unlocked position.

A user-friendly and comfortable actuation of the locking element for unlocking the polygonal inner receptacle of the tool receptacle can thus be achieved.

Preferably, the locking element is configured in the manner of a locking ball.

A simple and inexpensive locking element can thus be provided.

Preferably, the locking ball has a diameter above 3.2mm.

A stable and robust locking element can thus be provided.

According to one embodiment, an axial length formed between the free end of the tool receptacle and the opening center point of the at least one through-opening lies in the range of 11 mm to 13 mm.

The invention thus achieves the provision of a hand-held power tool on which plug-in tools manufactured in accordance with various international standards can be locked and operated in a safe and reliable manner on a tool receptacle. In particular, for example socket wrenches manufactured according to European or North American industrial standards can be safely and reliably driven with a polygonal outer receptacle and plug tools manufactured according to Japanese standards can be safely and reliably actuated with a polygonal inner receptacle.

Preferably, said polygonal inner receiving means has an axial length of at least 26.5 mm.

As a result, plug-in tools with relatively long handles can also be accommodated in the polygonal inner receptacle.

Preferably, said polygonal outer containment means has an axial length of at least 15mm and preferably at least about 16mm.

As a result, any plug-in tool that can be connected to the polygonal outer receptacle can be driven on the tool receptacle without loosening and impact during operation of the hand-held power tool.

The problem mentioned at the outset can also be solved by a tool receptacle having a polygonal inner receptacle and a polygonal outer receptacle, wherein at least one through-opening is provided through which the locking element passes in an associated locking position The through-opening fits into the polygonal inner receptacle to lock a plugging tool disposed in the polygonal inner receptacle. In order to fix the locking element in the at least one through-opening, at least one elastically deformable fastening element is provided, which is axially immovable and non-rotatably arranged outside the polygon. on the container.

Description of drawings

The invention is explained in greater detail in the following description on the basis of exemplary embodiments shown in the drawings. The accompanying drawings show:

FIG. 1 : a schematic illustration of a hand-held power tool with a plug-in tool according to one embodiment;

FIG. 2 : perspective view of an assembly with the driven shaft and the tool holder from FIG. 1 and the locking device provided with the fastening part according to the first embodiment;

Figure 3: An exploded view of the components of Figure 2;

Figure 4: A cross-sectional view of the assembly of Figure 2 with an exemplary splicing tool in the assembly;

FIG. 5 : perspective view of the assembly with the output shaft and the tool holder and the locking unit provided with the fastening part according to the second embodiment;

FIG. 6: An exploded view of the assembly of FIG. 5 with the fastening element according to the second embodiment;

FIG. 7: Perspective view of a fixing part according to a third embodiment;

FIG. 8 : perspective view of a fixing part according to a fourth embodiment;

Fig. 9: Sectional view of the assembly of Fig. 5 with an exemplary insertion tool provided therein.

Detailed ways

FIG. 1 shows a hand-held power tool 100 with a tool receptacle 150 having a housing 110 with a handle 126 . According to one specific embodiment, hand-held power tool 100 can be connected mechanically and electrically to battery pack 130 in order to be independent of mains power supply.

Hand-held power tool 100 is designed, for example, as a cordless rotary impact driver. However, it should be pointed out that the present invention is not limited to cordless rotary impact drivers, but can be used in different power tools, such as screwdrivers, drill drivers, impact drills, etc., regardless of whether the power tool can be used It is irrelevant for grid-dependent drive via battery pack or grid-dependent drive. In addition, it should be pointed out that the invention is not restricted to motor-driven hand-held power tools, but can generally be used in tools for which tool receptacle 150 is used.

An electric drive motor 114 powered by a battery pack 130 , a transmission 118 and an optional impact mechanism 122 are located in the housing 100 . The electric drive motor 114 can be controlled, ie can be switched on and off, for example via a manual switch 128 and can be any type of motor, for example an electronically commutated motor or a DC motor. Preferably, the drive motor 114 can be electronically controlled or regulated (or without feedback control or feedback control) in such a way that not only reverse operation but also a specification with respect to a desired rotational speed can be achieved. The function and structure of suitable drive motors are sufficiently known from the prior art that they will not be described in detail for the sake of brevity.

The drive motor 114 is connected via an associated motor shaft 116 to a transmission 118 , which converts the rotation of the motor shaft 116 into a rotation of a drive element 120 , for example a drive shaft, arranged between the transmission 118 and an optional hammer mechanism 122 . This switching is preferably effected in such a way that the drive element 120 rotates relative to the motor shaft 116 with an increased torque but a reduced rotational speed. The drive motor 114 is illustratively arranged in a motor housing 115 and the transmission 118 is arranged in a transmission housing 119 , wherein the transmission housing 119 and the motor housing 115 are arranged in the housing 110 by way of example.

The optional impact mechanism 122 connected to the drive element 120 is, for example, a rotary or rotary impact mechanism, which generates impact-type rotary pulses with high intensity and transmits them to the driven shaft 124 , for example a driven spindle superior. On the driven shaft 124 is provided a tool holder 150 which is preferably designed to accommodate a plug-in tool and which according to one embodiment can be connected not only to the plug-in tool 140 with the outer polygonal coupling part 142 but also to the plug-in tool 140 with the inner Plug-in tool, e.g. box wrench connection for polygonal couplings. The plug-in tool 140 is exemplarily configured as a screwdriver bit with an outer polygonal coupling 142 , illustratively configured as a hexagonal coupling, which is arranged in a suitable inner receptacle of a tool receptacle 150 ( FIG. 2 ). 290). Such screwdriver bits are sufficiently known from the prior art that they will not be described in detail for the sake of brevity.

It should be pointed out, however, that the inner receptacle ( 290 in FIG. 2 ) can be configured not only for accommodating screwdriver bits 140 , but also or alternatively for accommodating so-called HEX drill bits. A suitable HEX drill bit is a socket tool with a shank comprising an at least partially hexagonal cross-section and provided with an annular groove. In addition, the inner receptacle ( 290 in FIG. 2 ) can also or alternatively be designed for accommodating a so-called SDS-Speed Mini Drill. For this purpose, a suitable SDS-quick mini-drill is a drill that has a substantially cylindrical shank with two protruding swiveling lugs parallel to the longitudinal axis of the shank, the swivel The driving webs each have a locking recess. However, it should be pointed out that the inner receptacle ( 290 in FIG. 2 ) can additionally or alternatively also be configured for receiving other types of plug tools, for example for receiving SDS-Plus plug tools. Exemplary plug-in tools are sufficiently known to those skilled in the art, for example, from document DE 20 2007 010 699 U1, the disclosure content of which is expressly incorporated in this description, so that for the sake of brevity the description will not be described in detail here.

FIG. 2 shows an assembly 200 comprising the driven shaft 124 of FIG. In FIG. 1 , upper region 202 is connected to optional striking mechanism 122 of hand power tool 100 . According to one embodiment, an axial extension 135 is provided in the region of the distal end of the driven shaft 124 or at the free end 204 . The axial extension is preferably formed onto the output shaft 124 and is preferably formed in one piece with the output shaft.

According to one embodiment, the driven shaft 124 has a preferably cylindrical first section 214 starting from the driven cam 208 in the direction of the free end 204 as far as the first annular shoulder 215 . has a first diameter D1. At the second annular shoulder 299 the output shaft 124 transitions into the outer receptacle 210 assigned to the tool receptacle 150 . The outer receptacle 210 forms the tool receptacle 150 with an inner receptacle 290 penetrating at least partially in the axial direction and is illustratively formed on the driven shaft 124 in the region of the second annular shoulder 299 and is preferably connected to the driven shaft 124 . The drive shaft is constructed in one piece. A locking device 240 is assigned to the inner receiving device 290 .

The outer receptacle 210 is, for example, a polygonal outer receptacle, preferably a quadrangular outer receptacle, which, viewed in the radial direction, illustratively has four preferably flat sides 261 , 262 , 263 , 264 and is designed at least according to one embodiment. To accommodate plug-in tools with internal polygonal couplings manufactured to European or North American industry standards, such as socket wrenches. The side surfaces 261 , 262 , 263 , 264 are illustratively connected to one another via chamfered edges.

In the direction of the free end 204 of the driven shaft 124 the outer receiving device 210 merges into an axial widening 235 . This axial expansion has, for example, an end flange 232 whose diameter can be predetermined such that it is smaller than the distance between two opposite sides of the outer receptacle 210 , for example the side 261 and 263 or between 262 and 264. A preferably elastically deformable holding element 230 is fastened in the region of the axial extension 235 . This holding element is used to fasten a plug-in tool with an inner polygonal coupling, for example a socket wrench, manufactured according to European or North American industrial standards, on the outer receptacle 210 . Holding element 230 illustratively has a fastening element 238 , which is preferably designed as an elastically deformable spring coil.

Inner receptacle 290 is formed, for example in the manner of a polygonal inner receptacle, within output shaft 124 and is used to accommodate at least screwdriver bit 140 from FIG. 1 . Illustratively, inner receiver 290 has a hexagonal inner profile 295 and preferably has an axial length of at least 26.5 mm. The inner receptacle 290 is assigned at least one locking unit 300 for locking the screwdriver bit 140 of FIG. 1 , which locking unit is described below in FIGS. 3 and 4 . According to one embodiment, the locking unit is assigned to the locking device 240 and is arranged in the region of an illustratively annular receiving groove 217 provided on the outer receptacle 210 .

According to one embodiment, the locking device 240 has an actuating element 260 to which a locking element 270 provided with an inner annular shoulder 275 is configured to be able to lock the Unit 300 is locked in an assigned locking position. The actuating element 260 illustratively has a handle cover 278 provided with the outer handle region 268 , which preferably has an elastomer and is made of rubber, for example, and is fastened to the locking element 270 . The preferably ring-shaped locking element 270 is displaceable via the actuating element 260 in the direction of the free end 204 from a locking position into an unlocking position in order to release the locking unit 300 locked in its locking position.

FIG. 3 shows the assembly 200 from FIG. 2 in order to illustrate an exemplary configuration of the locking device 240 and the output shaft 124 . At a first annular shoulder 215 , the output shaft merges into a second cylindrical section 216 with a second diameter D2 , which is smaller than the first diameter D1 of the cylindrical first section 214 . In the region of the second cylindrical section 216 , an annular groove 218 is provided on the driven shaft 124 , which tapers again at a second annular shoulder 299 and transitions as described in FIG. 2 . Into the outer receptacle 210 on which an annular groove 217 is formed. An axial expansion 235 , for example also provided with an annular groove 231 , adjoins the outer receptacle 210 .

According to one embodiment, at least one and preferably two through openings 325 are formed in the region of the annular groove 217 for receiving associated locking elements 360 which are assigned to the locking unit 300 . The locking element 360 is preferably configured in the manner of a locking ball and preferably has a diameter of more than 3.2 mm, in particular at least 4 mm. For fastening the locking element 360 in the through-opening 325 , preferably at least one fastening element 350 which is at least partially elastically deformable is provided.

The fastening element 350 is preferably designed in the manner of a C-ring which is elastically deformable and clampable to the driven shaft 124 and has at least one and preferably two recesses 352 opposite each other on diametrically opposite ends, the locking element 360 Engages at least partially in the recess both in the associated locking position and in the associated unlocking position of locking unit 300 . Fastening part 350 is here preferably designed for loading locking element 360 into the associated locking position in the unloaded state. Furthermore, the fixing part 350 has an annular flange 350 .

According to the first embodiment, the fastening part 350 can be locked in the associated locking position by the locking part 270 assigned to the actuating element 260 of the locking device 240 . The locking element 270 is held on the driven shaft 124 by a preferably at least partially annular holding element 380 with an approximately L-shaped cross section, which is also assigned to the locking device 240 and has at least one and preferably two radial Extensions 382 which are each provided with a through-opening 384 which is implemented tangentially with respect to the holder 380 .

In an exemplary assembly of the assembly 200 , the annular holder 380 is first pushed onto the second cylindrical section 216 of the output shaft 124 until it rests against the first annular shoulder 215 . A spring element 242 , preferably a compression spring, is then provided on the second cylindrical section 216 inside the holder 380 . The compression spring is prestressed relative to the holder 380 by fixing the safety ring 246 , preferably a C-ring, in the annular groove 218 provided on the second cylindrical section 216 such that the holder is pushed toward the output shaft 124 The direction of the proximal region 202 is elastically loaded.

In a next step, the locking element 360 is arranged in the through-opening 325 of the output shaft 124 and is fastened to the output shaft 124 by pushing or clamping the fixing part 350 onto the output shaft 124 . The fastening part 350 is here preferably axially immovable and non-rotatably arranged on the outer receptacle 210 .

The locking part 270 is then pushed onto the holding part 380 in such a way that its inner annular shoulder 275 rests radially on the annular flange 354 of the fixing part 350 and its radial extension 382 fits into the corresponding diameter of the locking part 270. Into the recesses 375 , wherein in the region of each radial recess 375 there are respectively two mutually opposite, tangential bores 374 , 376 . In a further step, said locking member 270 is secured by means of transverse or tangential pins 370 pushed into holes 374, 384 and 376, respectively. The subsequent fixing of the transverse or tangential pins in the holes 374 , 384 and 376 is achieved by pushing the handle cover 278 provided with the outer handle region 268 onto the lock 270 . In this case, the handle glove 278 is fastened to the outer annular groove 379 of the locking element 270 at least via an inner annular shoulder 369 provided thereon. A handle 278 , a locking element 270 , a transverse or tangential pin 370 and a retaining element 380 are assigned to the actuating element 260 .

It should be noted that transverse or tangential pins 370 may be loosely disposed in holes 374 , 384 and 376 as they are secured to lock 270 and retainer 380 by handle glove 278 . However, as an alternative or in addition to this, the transverse or tangential pin 370 can also be pressed, screwed or riveted into the holes 374, 384 and 376 and/or glued, welded on the locking part 270 and/or the holding part 380 superior.

Finally, the retaining element 230 is fastened in the annular groove 231 of the axial extension 235 . In this case, first an O-ring 234 , preferably made of rubber, assigned to holding element 230 is arranged in annular groove 231 , and then fastening element 238 is arranged on the outer circumference of the annular groove.

FIG. 4 shows the assembly 200 of FIG. 2 or FIG. 3 assembled, including the driven shaft 124 provided with the tool receiving device 150 and the locking device 240 and including an exemplary JIS-made drill socket. Connect tool 410. This drill plug tool 410 has illustratively a cup-shaped drilling section 412 provided with serrations 418 and a pin-shaped locking section or locking handle 414 which is provided with There is a polygonal profile designed for rotational entrainment and has an at least partially annular groove 416 . The locking element 360 of the locking unit 300 of the locking device 240 engages in the groove 416 for locking the locking lever 414 in the inner receptacle 290 .

The locking element 360 is loaded radially inward by the fastening part 350 through the through-opening 325 into the associated locking position, wherein the fastening part 350 is preferably in an unloaded state and is locked in this state by the locking part 270 in the locking device 240 . In the locked position of the actuating element 260 . The actuating element 260 points away from the hand power tool ( 100 in FIG. 1 ) in the axial direction, ie in the direction of the free end 204 , in order to release the fastening part 350 by means of the locking part 270 against the spring force exerted by the spring part 242 . Move from the locked position into the unlocked position. After such release, the drilling plug tool 410 can be pulled out from the inner receiving device 290, wherein the locking element 360 is pressed radially outwards into the opening 352 of the fixing part 350 and the fixing part can be elastically radially Outer deformation.

Between free end 204 of tool holder 150 or driven shaft 124 and opening center point 499 of through opening 325 , an axial length 415 is preferably formed in the range of 11 mm to 13 mm, preferably 12 mm. An axial length 425 preferably in the range of 13 mm to 15 mm, preferably 14 mm, is formed between the opening center point 499 and the drilling section 412 of the drilling insert 410 locked in the inner receptacle 290 . The outer containment device 210 preferably has an axial length 488 of at least 15 mm, and preferably at least about 16 mm.

5 shows an assembly 500 comprising a driven shaft 524 provided with a tool receiver 550, a proximal region 502 of the driven shaft provided with at least one and illustratively two driven lugs 508 according to A further embodiment can be connected to optional striking mechanism 122 of hand power tool 100 from FIG. 1 . In the proximal region of the driven shaft 524 or on the free end 504 is illustratively provided the axial expansion 235 of FIGS. The driven shaft is formed in one piece.

According to one embodiment, the output shaft 524 has a preferably cylindrical first section 514 starting from the output cam 508 in the direction of the free end 504 as far as the first annular shoulder 515 . The segment has a first diameter DI. This first section transitions at a first annular shoulder 515 into a second cylindrical section 516 having a second diameter DII, where DII<DI. The second cylindrical section 516 merges at the second annular shoulder 599 into an outer receptacle 510 assigned to the tool receptacle 550 . The outer receptacle 510 forms the tool receptacle 550 together with an inner receptacle 590 penetrating at least partially in the axial direction.

The outer container 510 preferably has an axial length of at least 15 mm and preferably at least approximately 16 mm and is exemplarily a polygonal outer container, preferably a quadrilateral outer container, which illustratively has four preferably flat sides 561 viewed radially , 562, 563, 564. The sides are illustratively connected to one another via chamfered edges. In the direction of the free end 504 of the driven shaft 524 the outer receiving device 510 merges into an axial extension 235 which is provided with the end flange 232 . An elastically deformable holding element 230 is fastened in the region of the axial extension 235 , said holding element having a fastening element 238 which is preferably designed as an elastically deformable spring coil.

Inner receptacle 590 is formed in the interior of output shaft 524 , for example in the manner of a polygonal inner receptacle, and serves at least for receiving screwdriver bit 140 from FIG. 1 . Illustratively, inner receiver 590 has a hexagonal inner profile 595 and preferably has an axial length of at least 26.5 mm. Assigned to inner receptacle 590 is at least one locking unit 600 for locking screwdriver bit 140 from FIG. 1 , which is described below in FIGS. 6 and 9 . According to one embodiment, the locking unit is arranged in the region of an illustratively annular receiving groove 517 provided on the outer receiving device 510 .

FIG. 6 shows the assembly 500 of FIG. 5 to illustrate an exemplary embodiment of the locking unit 600 and the driven shaft 524 . In the region of the annular groove 517 , the output shaft has at least one and preferably two through-openings 625 for receiving an associated locking element 660 which is assigned to the locking unit 600 . The locking element 660 is preferably configured in the manner of a locking ball and preferably has a diameter of 3.2 mm or more. For fastening the locking element 660 in the through-opening 625 , preferably at least one elastically deformable fastening element 650 is provided, which is likewise assigned to the locking unit 600 .

The fastening element 650 is preferably constructed according to a C-ring which is elastically deformable and can be clamped onto the output shaft 524 , which preferably consists of metal. The fixture preferably includes an inner side 654 with, for example, a circular inner cross-section 654 and an outer side 656 with, for example, a rectangular outer cross-section. Fastening part 650 preferably has at least one and preferably two recesses 652 into which locking element 660 engages at least partially both in an associated locking position and in an associated unlocking position of locking unit 600 . The fastening part 650 is preferably designed here to load the locking element 660 into the associated locking position in the unloaded state.

In an exemplary assembly of the assembly 500, the locking element 660 is disposed in the through opening 625 of the driven shaft 524 and is secured to the driven shaft 524 by pushing or clamping the fastener 650 onto the driven shaft 524. on axis. The fastening element 650 is preferably axially immovable and relatively rotationally fixed in the annular groove 517 on the outer receptacle 510 . The retaining element 230 is then fastened in the annular groove 231 of the axial extension 235 . In this case, the O-ring 234 , preferably made of rubber, assigned to the retaining element 230 in FIG. 3 is first arranged in the annular groove 231 , and then the fastening element 238 is arranged on the outer circumference of the annular groove.

FIG. 7 shows a fastening part 750 according to an alternative embodiment, which can be used together with the locking unit 600 from FIGS. 5 and 6 instead of the fastening part 650 from FIG. 6 . The fastening element preferably has an approximately C-shaped metal inner ring 780 with an approximately circular inner circumference 754 and an outer cover 756 , for example made of plastic. Illustratively, two through openings 752 on diametrically opposite ends pass through the metal inner ring 780 and the cover 756 . In other respects, the shape and function correspond to the fastening element 650 in FIG. 6 and are therefore not explained further.

FIG. 8 shows a fastening element 850 according to another alternative embodiment, which can be used together with the locking unit 600 from FIGS. 5 and 6 instead of the fastening element 650 from FIG. 6 . The retainer preferably consists of a metallic C-ring with approximately circular inner and outer circumferences 584 or 856 and, for example, with two through-openings 852 at diametrically opposite ends.

Fig. 9 shows the assembly 500 in Fig. 5 or Fig. 6 after assembly, including the driven shaft 524 provided with the tool receiving device 550 and the locking unit 600 and including the exemplarily manufactured according to the Japanese Industrial Standards in Fig. 4 . Drilling plug tool 410 . The locking unit automatically locks the drilling insertion tool 410 there, preferably when the drilling insertion tool 410 is pushed into the inner receiving device 590 preferably with one hand, and preferably when the drilling insertion tool 410 is received from the inside. When the device 590 is pulled out with one hand, it automatically releases the drilling plug-in tool. The function mode of the locking unit 600 corresponds to that of the locking unit 300 in FIGS. Describe in detail.

FIG. 9 illustrates an embodiment with an illustratively elongated outer receptacle 510 . The outer containment means preferably has an axial length 988 of at least 16mm.

Claims (12)

1. hand held power machine (100), it has driven shaft (124), the tool Holder (150) that is provided with the interior storing apparatus (290) of polygon and the outer storing apparatus (210) of polygon is arranged on described driven shaft, described tool Holder has at least one and runs through opening (325), described in locking element (360) passes in a lock position of attaching troops to a unit, running through opening is coupled in storing apparatus in described polygon (290) so that locking is arranged on the insertion tool (410) in storing apparatus in described polygon (290), it is characterized in that, described in described locking element (360) is fixed on, at least one runs through in opening (325), at least one fixture of strain (350) at least is partly set, described fixture is axially not movable and be arranged on without relative rotation on the outer storing apparatus (210) of described polygon.

2. hand held power machine according to claim 1, is characterized in that, described at least one type constitution that the fixture of strain (350) encircles according to the C shape of elastically deformable at least partly.

3. hand held power machine according to claim 2, it is characterized in that, described at least one at least partly the fixture of strain (350) there is at least one vacancy (352), described locking element (360) is coupled at least partly in described vacancy in described lock position of attaching troops to a unit and in a unlocked position of attaching troops to a unit.

4. according to the hand held power machine one of the claims Suo Shu, in described at least one lock position that the fixture of strain (350) is attached troops to a unit described in being configured under no load condition, described locking element (360) to be loaded at least partly.

5. hand held power machine according to claim 4, it is characterized in that, one locking member (270) is set, and described locking member is configured under described no load condition, to lock described at least one fixture of strain (350) at least partly.

6. hand held power machine according to claim 5, it is characterized in that, described locking member (270) is configured to an actuation member (260), described actuation member for discharge described at least one at least partly the fixture of strain (350) can utilize spring force that described locking member (270) opposing applies by the spring part of attaching troops to a unit (242) and referring to from lock position, to move to unlocked position on the axial direction of described hand held power machine (100).

7. according to the hand held power machine one of the claims Suo Shu, it is characterized in that, described locking element (360) is according to the type structure of locking ball.

8. hand held power machine according to claim 7, is characterized in that, described locking ball has the diameter that is greater than 3.2mm.

9. according to the hand held power machine one of the claims Suo Shu, it is characterized in that, be configured in described tool Holder (150) free end (204) and described at least one run through the scope that axial length (415) between the open centre point (499) of opening (325) is positioned at 11mm to 13mm.

10. according to the hand held power machine one of the claims Suo Shu, it is characterized in that, in described polygon, storing apparatus (290) has at least axial length of 26.5mm.

11. according to the hand held power machine one of the claims Suo Shu, it is characterized in that, the outer storing apparatus (210) of described polygon has at least 15mm and the preferred axial length at least about 16mm.

12. tool Holders (150), it has storing apparatus (290) and the outer storing apparatus (210) of polygon in polygon, wherein, at least one is set and runs through opening (325), described in one locking element (360) passes in the lock position of attaching troops to a unit, running through opening is coupled in storing apparatus in described polygon (290) to will be arranged on insertion tool (410) locking in storing apparatus in described polygon (290), it is characterized in that, described in described locking element (360) is fixed on, at least one runs through in opening (325), at least one fixture of strain (350) at least is partly set, described fixture is axially not movable and be arranged on without relative rotation on the outer storing apparatus (210) of described polygon.