CN108687368B

CN108687368B - Chuck for a hand-held power tool

Info

Publication number: CN108687368B
Application number: CN201810324853.9A
Authority: CN
Inventors: C·C·林; S·Y·李
Original assignee: Robert Bosch GmbH
Current assignee: Robert Bosch GmbH
Priority date: 2017-04-12
Filing date: 2018-04-12
Publication date: 2022-01-11
Anticipated expiration: 2038-04-12
Also published as: DE102017206294A1; CN108687368A

Abstract

A chuck for a hand-held power tool, having a chuck housing in which a tool receiver for receiving an insertion tool is formed, wherein the tool receiver has at least three clamping jaws for securing the insertion tool, wherein the at least three clamping jaws are movable by means of an actuating ring arranged rotatably in the chuck housing at least from an unlocking position, in which the insertion tool can be removed from the tool receiver, into a locking position, in which the insertion tool is secured in the tool receiver, wherein the at least three clamping jaws are arranged completely in the chuck housing in the locking position and the unlocking position by means of a clamping jaw retaining device and are arranged immovably in the axial direction of the tool receiver.

Description

Chuck for a hand-held power tool

Technical Field

The invention relates to a chuck for a hand-held power tool (Spannfotter), comprising a chuck housing in which a tool receiver for receiving a plug-in tool is formed, wherein the tool receiver has at least three clamping jaws for securing the plug-in tool, and wherein the at least three clamping jaws can be moved by an actuating ring arranged on the chuck housing in a rotationally movable manner at least from an unlocking position, in which the plug-in tool can be removed from the tool receiver, into a locking position, in which the plug-in tool is secured in the tool receiver.

Background

Such chucks for hand-held power tools are known from the prior art and have a chuck housing, in which a tool receiver for receiving a plug-in tool is formed. In this case, the tool receiver has three clamping jaws for fastening the insertion tool, which clamping jaws are arranged on a conical carrier element. The jaws can be moved along the conical carrier element by an actuating ring arranged in a rotationally movable manner in the chuck housing from an unlocking position, in which the plug-in tool can be removed from the tool receptacle, into a locking position, in which the plug-in tool is fixed in the tool receptacle. In this case, the clamping jaws are arranged in the chuck housing in the unlocked position and at least in sections outside the chuck housing in the locked position.

Disclosure of Invention

The invention provides a novel chuck for a hand-held power tool, having a chuck housing in which a tool receiver for receiving a plug-in tool is formed, wherein the tool receiver has at least three clamping jaws for securing the plug-in tool, and wherein the at least three clamping jaws can be moved by an actuating ring arranged in the chuck housing in a rotationally movable manner at least from an unlocking position, in which the plug-in tool can be removed from the tool receiver, into a locking position, in which the plug-in tool is secured in the tool receiver. The at least three clamping jaws are arranged completely in the chuck housing in the locking position and the unlocking position by means of the clamping jaw retaining device and are arranged in the chuck housing in a manner that they are not movable in the axial direction of the tool receiver.

The invention thus makes it possible to provide a chuck in which a shortened design of the chuck can be provided by the clamping jaws which are always completely received in the chuck housing and are arranged in the chuck housing in a manner that they are not movable in the axial direction of the tool receiver. The insertion tool can advantageously be locked and/or unlocked in the collet by a small rotational movement of the actuating ring.

Preferably, the actuating ring is equipped with a coupling element which is designed to convert a rotational movement of the actuating ring into a locking movement and/or an unlocking movement of the at least three clamping jaws. Thus, the jaws can be safely and reliably moved from the locked position into the unlocked position or vice versa.

The coupling element is preferably designed for moving the at least three clamping jaws in a movement plane oriented at least approximately perpendicularly to the axial direction of the tool holder or for pivoting the at least three clamping jaws about a rotational axis in the movement plane. In a simple manner, it is thus possible to arrange the clamping jaws fixedly in the chuck housing in the axial direction of the tool receiver.

According to one embodiment, the clamping jaw holding device has a linear guide groove associated with the at least three clamping jaws in the radial direction of the chuck housing for the movement of the clamping jaws. Thus, a simple and uncomplicated movement track can be provided for the jaws.

Preferably, the coupling element has a helical thread on its side facing the at least three clamping jaws and the at least three clamping jaws each have a thread section associated with the helical thread on their side facing the coupling element. Thereby, a safe and reliable transformation of the rotational movement of the operating ring into a locking and/or unlocking movement of the clamping jaws is enabled.

The at least three clamping jaws preferably each have a first group/plurality of webs on a first side and a second group of webs on a second side opposite the first side in the circumferential direction of the chuck housing, wherein the first group of webs is arranged asymmetrically with respect to the second group of webs. Thus, a suitable configuration of the clamping jaws can be enabled in a simple manner.

According to one embodiment, the partitions of the first and second sets of partitions are configured such that, in the locked position, the partitions of the first set of partitions of a first jaw and the partitions of the second set of partitions of an adjacent second jaw cross each other. Thus, a stable and robust arrangement of the clamping jaws in the locking position, in which the clamping jaws are arranged without play with respect to one another, may be enabled, whereby jamming and/or toppling of the insertion tool upon locking and/or unlocking may be prevented.

Each of the at least three clamping jaws preferably has a triangular contour on its end facing the tool receptacle, so that in a fully closed position of the at least three clamping jaws, in which a plug-in tool cannot be arranged in the tool receptacle, the at least three clamping jaws rest on one another without play. Thus, the closing of the tool receptacle can be enabled in a simple manner.

Preferably, the at least three clamping jaws are L-shaped or C-shaped for pivoting about their rotational axes. Thus, a reproducible, suitable shape of the clamping jaws can be predetermined in an uncomplicated and effective manner.

The jaw holding arrangement is preferably of two-part construction with a first and a second holding element, wherein the at least three jaws are rotatably arranged between the first and the second holding element. Thus, a safe and reliable arrangement of the clamping jaws in the clamping jaw holding device is enabled.

According to one embodiment, the at least three clamping jaws are spring-loaded, wherein the second holding element has receptacles associated with the at least three clamping jaws for arranging spring elements. A simple and uncomplicated arrangement of the clamping jaws is thus made possible, in which arrangement the insertion tool can be reliably arranged in the tool receptacle.

A locking device is preferably provided, which is operatively connected to the coupling element by a latching connection and is designed to prevent unintentional and/or autonomous rotation of the actuating ring. Thus, a safe and reliable chuck can be provided.

Preferably, the jaw holding device is configured such that a rotation of the actuating ring by a small angle, preferably by 20 °, moves the at least three jaws from the unlocking position into the locking position or vice versa. Thus, a user-friendly chuck can be provided in a simple manner.

The invention further provides a hand-held power tool having a chuck, which has a chuck housing, in which a tool receiver for receiving a plug-in tool is formed, wherein the tool receiver has at least three clamping jaws for securing the plug-in tool, and wherein the at least three clamping jaws can be moved by an actuating ring arranged in the chuck housing in a rotationally movable manner at least from an unlocking position, in which the plug-in tool can be removed from the tool receiver, into a locking position, in which the plug-in tool is secured in the tool receiver. The at least three clamping jaws are arranged completely in the chuck housing in the locking position and the unlocking position by means of the clamping jaw retaining device and are arranged in the chuck housing in a manner that they are not movable in the axial direction of the tool receiver.

Drawings

In the following description, the invention is explained in detail on the basis of embodiments shown in the drawings. The figures show:

fig. 1 is a schematic illustration of a hand-held power tool with a chuck;

FIG. 2 is a perspective view of the chuck of FIG. 1 according to one embodiment;

FIG. 3 is an exploded view of the chuck of FIG. 2;

FIG. 4a is a front view of the fully opened chuck of FIGS. 2 and 3;

FIG. 4b is a perspective side view of the chuck of FIG. 4 a;

FIG. 5a is a front view of the partially closed clamp of FIGS. 2-4 b;

FIG. 5b is a side perspective view of the chuck of FIG. 5 a;

FIG. 6a is a front view of the fully closed chuck of FIGS. 2-5 b;

FIG. 6b is a side perspective view of the chuck of FIG. 6 a;

FIG. 7 is a front perspective view of the fully open chuck of FIGS. 2-6 b with an insertion tool;

FIG. 8 is a front perspective view of the partially closed chuck of FIG. 7 with the insertion tool of FIG. 7;

FIG. 9 is a front perspective view of the collet of FIGS. 7 and 8 in a locked position;

FIG. 10 is a perspective side view of a jaw associated with the chuck of FIGS. 2-9;

FIG. 11 is a perspective view of the jaw of FIG. 10 from below;

figure 12 is a front view of two adjacent jaws;

figure 13 perspective view of two adjacent jaws of figure 12

FIG. 14 is a perspective view of a coupling element associated with the chuck of FIGS. 2-9;

FIG. 15 is a perspective view of a chuck according to an alternative embodiment;

FIG. 16 is a front view of the fully closed chuck of FIG. 15;

FIG. 17 is an exploded view of the chuck of FIGS. 15 and 16;

figure 18 is a front view of the fully open chuck of figures 15 to 17;

FIG. 19 is a front view of the partially closed chuck of FIG. 18;

FIG. 20 is a front view of the fully closed clamp according to FIG. 16 of FIGS. 18 and 19;

FIG. 21 is a perspective view of the chuck of FIGS. 15-20 during a locking procedure;

figure 22 is a perspective view of a jamming device associated with the cartridge of figures 15 to 21;

FIG. 23 is a perspective view of the fully closed chuck of FIGS. 15-22 with spring-loaded jaws;

FIG. 24 is a front view of the chuck of FIG. 23 with spring-loaded jaws;

fig. 25 is a side view of the collet of fig. 15-24 in an unlocked position; and

FIG. 26 is a side view of the collet of FIG. 25 in a locked position.

Detailed Description

Fig. 1 shows a hand-held power tool 100 provided with a tool receiver 150, which has a power-tool housing 110, which has a handle 126 and is designed as a battery-operated rotary impact screwdriver by way of example. According to one specific embodiment, the hand-held power tool 100 can be mechanically and electrically connected to the battery pack 130 for network-independent current supply, but can also be operated, for example, in a network-dependent manner instead. It is to be noted, however, that the invention is not limited to a rechargeable battery rotary impact screwdriver, but rather can be used universally in tools having a tool holder designed in accordance with the tool holder 150 of the invention, regardless of whether the tool is operated in motor mode or in a mains-independent or mains-dependent manner by means of a rechargeable battery.

In the machine tool housing 110, for example, an electric drive motor 114, which is supplied with current by a battery pack 130, an optional gear 118 and an optional mechanical striking mechanism 122 are arranged, wherein the drive motor 114 can be actuated, i.e., switched on and off, for example, by a manual switch 128 and can be of any motor type, for example, an electronically commutated motor or a direct current motor. 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 a percussion mechanism 122. In the illustration, the gear 118 is arranged in a gear housing 119, the drive motor 114 is arranged in the motor housing 115 and the impact mechanism 122 is arranged in an impact mechanism housing 121, wherein these

housings

119, 115, 121 are arranged, for example, in the machine tool housing 110.

It is to be noted that the configuration of the hand-held power tool 100 with the optional striking mechanism 122 and/or the optional transmission 118 has merely exemplary features and should not be considered as limiting the invention. Thus, the hand-held power tool 100 can also be constructed without the impact mechanism 122 and/or the transmission 118.

An optional impact mechanism 122 connected to the drive shaft 120 is, for example, a rotary or rotary impact mechanism, which generates and transmits impact-type rotary impulses of high intensity to a driven shaft 124, for example a driven spindle. Exemplary impact mechanisms by which the alternative impact mechanism 122 may be implemented are well known in the art, such that a detailed description of the impact mechanism 122 may be omitted for the sake of brevity of the description.

A tool receiver 150, which is preferably designed for receiving a plug-in tool 170, is arranged on the output shaft 124 in the region of the end face 112 of the power tool housing 110. The tool receiving portion is illustratively configured in accordance with the type of drill chuck or collet (200 in fig. 2; 400 in fig. 15) and is provided with at least three jaws (220 in fig. 2; 420 in fig. 15). It is to be noted, however, that the tool receiver 150, which is designed as a collet, can also be designed as a collet adapter for releasable arrangement on a tool receiver of the hand-held power tool 100.

Fig. 2 shows the tool receiver 150 of the hand-held power tool 100 of fig. 1 in the form of a collet 200. The clamping head 200 preferably has a free first axial end 201 and a second axial end 202, the clamping head 200 being arranged with its second axial end 202 on the hand-held power tool 100. Here, the collet 200 preferably has a collet housing 215 in which a tool receiver 217 for receiving the exemplary plug-in tool 170 of fig. 1 is formed. Preferably, for fixing the insertion tool 170, the tool receptacle 217 is provided with at least three clamping jaws 220. The at least three clamping jaws 220 are preferably movable by means of a handling ring 210 which is arranged rotatably movably on the chuck housing 215. Preferably, the clamping jaws 220 can be moved by the actuating ring 210 at least from an unlocked position, in which the insertion tool 170 can be removed from the tool receptacle 217, into a locked position, in which the insertion tool 170 is fixed in the tool receptacle 217.

According to one embodiment, the jaws 220 are disposed entirely within the chuck housing 215 in the locked and unlocked positions by a jaw retention device (240 in fig. 3). Preferably, the clamping jaws 220 are arranged in the chuck housing 215 in a non-movable manner in the axial direction 205 of the tool receptacle 217. When the clamping jaws 220 are moved from their locking position into their unlocking position or vice versa, they are preferably moved in a movement plane 209 which is oriented at least approximately perpendicularly to the axial direction 205 of the tool receptacle 217. In this case, a rotation of the actuating ring 210 through a small angle, preferably 20 °, moves the clamping jaws 220 from their unlocking position into their locking position or vice versa.

Preferably, the cartridge housing 215 is secured to the cartridge 200 by a screw connection. For this purpose, the chuck housing 215 has three receptacles 216 for the arrangement of screws in the illustration and by way of example on the free first end 201 of the chuck 200. It is to be noted that instead of a screw connection, any other connection structure can be used, for example a clamping connection and/or a compression connection can be used.

Figure 3 shows the chuck 200 of figure 2 with its chuck housing 215 and a jaw retention arrangement 240, which is preferably connected to the chuck housing 215 by a screw connection. For this purpose, the jaw holding device 240 has a slot 242 associated with the receptacle 216 of the chuck housing 215 on the end face facing the chuck housing 215 or the first end 201.

Furthermore, the clamping jaw holding device 240 preferably has receptacles 244 assigned to the clamping jaws 220 in the radial direction of the chuck housing 215. Three receiving portions 244 are shown in the illustration, which are preferably configured as

rectilinear guide slots

245, 246 for the movement of each clamping jaw 220. These guide

slots

245, 246 preferably guide the jaws 220 along a radius of the tool receiving portion 217 in a radial direction of the chuck 200 or toward a center of the tool receiving portion 217. However, the

guide slots

245, 246 may also guide the clamping jaw 220 in any other direction, for example slightly tangentially. It is also noted that the rectilinear configuration of the

guide slots

245, 246 is merely an exemplary feature and should not be considered as limiting the invention. Thus, the

guide slots

245, 246 may also have any other shape, such as a curved shape, in particular a parabolic shape.

Preferably, the guide slot 245 is configured to face the first end 201 of the collet 200, while the guide slot 246 is configured to face the second end 202 of the collet 200. Furthermore, the jaw retaining arrangement 240 preferably has a connecting section 248 on its end face 247 facing the second end 202, by means of which the collet 200 is operatively connected to the output shaft 124 of the hand-held power tool 100. Preferably, the jaw holding device 240 is designed such that a rotation of the actuating ring 210 by a small angle, preferably 20 °, moves the jaws 220 from the unlocking position into the locking position and vice versa. However, the angle may also be smaller or larger than 20 °.

According to one embodiment, the clamping jaws 220 have, on their ends facing the first end 201 of the clamping jaw holding arrangement 240, guide sections 222 for guiding in guide grooves 246 of the clamping jaw holding arrangement 240 and, on their ends facing the second end 202 of the clamping jaw 200, guide sections 224 for guiding in guide grooves 245 of the clamping jaw holding arrangement 240. Preferably, the guide section 224 is T-shaped for a safe and secure guidance in the guide groove 245.

Furthermore, the jaws 220 preferably each have a first set 221 of

partitions

225 and 227 on a first side and a second set 231 of

partitions

235 and 237 on an opposing second side in the circumferential direction of the cartridge housing 215. Here, the first set 221 of spacers is preferably arranged asymmetrically with respect to the second set 231 of spacers.

Furthermore, the clamping jaws 220 preferably have a triangular contour 239 on their ends facing the tool receptacle 217, so that in the fully closed position of the clamping jaws 220, in which the insertion tool 170 cannot be arranged in the tool receptacle 217, the clamping jaws 220 rest against one another without play. Furthermore, gaps between the clamping jaws 220 are prevented by the

partitions

225 and 227 and 235 and 237, so that the insertion tool 170 can be prevented from falling out in the tool receptacle 217. The insertion tool 170 can thus be arranged in the tool receptacle 217, wherein the insertion tool 170 does not have to be held in the tool receptacle 217 by a user when moving from the unlocked position into the locked position.

Preferably, the clamping jaw 240 has a thread section 229 on its end facing the second end 202 or on the side of the guide section 224 facing the second end 202, by means of which the rotary movement of the actuating ring 210 is transmitted to the clamping jaw 220. For this purpose, the actuating ring 210 is equipped with a coupling element 250, which is designed to convert a rotational movement of the actuating ring 210 into a locking movement and/or an unlocking movement of the clamping jaws 220.

Preferably, the coupling element 250 is designed for moving the clamping jaw 220 in a movement plane 209 oriented at least approximately perpendicularly to the axial direction 205 of the tool receptacle 217. The coupling element 250 has an annular base body with a through-opening 252, by means of which the coupling element 250 is supported on the connecting section 248 of the jaw holding fixture 240. Preferably, a screw thread 255 is formed on the side of the coupling element 250 facing the clamping jaw 220, wherein the screw thread 225 is associated with the thread section 229 of the clamping jaw 220. Preferably, the helical thread 225 is configured such that twisting of the coupling element 250 moves the jaw 220 along the

guide slots

245, 246 in the jaw holding device 240 within the plane of motion 209. Furthermore, the coupling element 250 preferably has a latching section 257 on its side facing the second end 202, by means of which latching section the coupling element 250 is driven.

Preferably, the actuating ring 210 has a circumferential edge 213 on its side facing the first end 201. Preferably, the end face 247 of the jaw retaining device 240 facing the second end 202 of the chuck 200 and/or the chuck housing 215 with its end facing the second end 202 in the installed state rests against this circumferential edge 213.

Furthermore, the actuating ring 210 preferably has a positioning section 212 at least in sections on its inner circumference 211. The positioning section 212 is preferably designed to support the locking device 300 in a rotationally fixed manner.

The blocking device 300 is preferably operatively connected to the coupling element 250 by a snap connection and is designed to prevent the actuating ring 210 from being accidentally and/or autonomously twisted. In this case, the blocking device 300 preferably blocks the current position of the clamping jaw 220 directly during the adjustment.

The jamming device 300 preferably has a jamming ring 260, a friction disc 270, and a jamming element 280. The latching ring 260 preferably has at least one, preferably a plurality of positioning elements 266 on its outer circumference, which are configured such that they can be arranged between two adjacent positioning sections 212 of the actuating ring 210. Preferably, the latching ring 260 is arranged in the actuating ring 210 in a rotationally fixed manner by means of a press connection. Furthermore, the latching ring 260 has, on its end facing the first end 201, a first latching contour 262 associated with the latching section 257, by means of which a rotational movement of the actuating ring 210 is transmitted to the clamping jaws 220 via the coupling element 250.

On the end facing the second end 202, the latching ring 260 preferably has a further second latching contour 264 which is formed in the circumferential direction of the latching ring 260. Preferably, the second latching contour 264 is operatively connected to the latching element 280. The detent element 280 preferably has an annular base body with at least one, in the illustration three detent elements 282. These detent elements 282 are arranged at least approximately radially inward in the illustration in the direction of the notches 284 of the detent element 280. Preferably, a friction disc 270 is arranged between the snap ring 260 and the blocking element 280. The friction disks are preferably compressible and preferably have a high rotational friction.

In addition, a cover ring 290 is preferably disposed on the second end 202 of the collet 200. The cover ring 290 is preferably configured to retain the jamming device 300 in the manipulation ring 210. In addition, the cover ring 290 preferably protects all of the components of the cartridge 200 from contaminants.

Fig. 4a shows the clamping head 200 of fig. 2 and 3 in an unlocked position or in a completely open position. In the fully open position, the collet 220 releases the tool receiver 217. In this position, the insertion tool 170 may be disposed in the tool receptacle 217. Preferably, the collet 200 is configured for disposal of an insertion tool 170 having a diameter of 0.8mm to 13mm, but may also be configured for receipt of an insertion tool having a smaller or larger diameter.

Fig. 4b shows the chuck 200 of fig. 4a in a fully open position, wherein the chuck housing 215 and the jaw retaining arrangement 240 are shown transparently for better illustration. Fig. 4b shows the arrangement of the clamping jaw 220 or the thread section 229 on the helical thread 255 of the coupling element 250. In the fully open position, the jaws 220 are disposed at a radially outermost position.

Fig. 5a shows the clamping head 200 of fig. 2 and 3 in a locked or partially closed position. In the partially closed position, the clamping jaws 220 constitute a tool receptacle 217 which is triangular in the illustration.

Figure 5b shows the chuck 200 of figure 5a in a partially closed position, wherein the chuck housing 215 and the jaw retaining arrangement 240 are shown transparently for better illustration. Fig. 5b shows the arrangement of the clamping jaw 220 or the thread section 229 on the helical thread 255 of the coupling element 250. In fig. 5b, the clamping jaws 220 are arranged more radially inwards than in fig. 4b, wherein the

partitions

225 and 227 and 235 and 237 of two adjacent clamping jaws are in contact, but do not intersect.

Figure 6a shows the cartridge 200 of figures 2 and 3 in a fully closed position. In the fully closed position, the triangular profiles 239 of the individual clamping jaws 220 rest on one another without play and the insertion tool 170 cannot be arranged. Furthermore, the

partitions

225, 235, 237 of the first and

second sets

221, 231 of two adjacent jaws 220 preferably intersect here.

Figure 6b shows the chuck 200 of figure 6a in a fully closed position, with the chuck housing 215 and the jaw retaining arrangement 240 shown transparently for better illustration. Fig. 6b shows the arrangement of the clamping jaw 220 or the thread section 229 on the helical thread 255 of the coupling element 250. In fig. 6b, the clamping jaws 220 are arranged radially more inwardly or closer to the center of the tool receptacle 217 than in fig. 5 b. In this case, the

partitions

225 and 227 or the

partitions

235 and 237 of two adjacent clamping jaws 220 cross one another, so that the clamping jaws 220 rest against one another without play.

Fig. 7 shows the chuck 200 of fig. 2 and 3 in an unlocked position, with the insertion tool 170, which is embodied, for example, as a drill. The insertion tool 170 rests against two adjacent clamping jaws 220 in the unlocked position. By rotating the actuating ring 210, the clamping jaws 220 are moved in the direction of the center of the tool receptacle 217. Preferably, the clamping jaw 220 is moved in a clockwise direction or in the direction of the arrow 304 along its preferably

linear guide slots

245, 246 in the direction of the centre of the tool receptacle 217 (illustrated radially inwards in fig. 7). Here, the jaws 220 preferably load the insertion tool 170 radially inward in the direction of

arrows

302, 303. As explained above, the

guide slots

245, 246 may also have any other shape, by means of which it is also possible for the clamping jaw 220 to move in any direction, for example in a tangential direction.

Figure 8 shows the collet 200 of figure 7 in a locked position. In the locked position, the insertion tool 170 is preferably clamped between the jaws 220. Here, the insertion tool 170 has been automatically centered by moving from the unlocked position into the locked position. In this case, the insertion tool 170 has been moved in the tool receptacle 217 by the three clamping jaws 220 in the direction of the center of the tool receptacle 217 or in the direction of the arrow 305. The insertion tool 170 need not be held in the chuck 200 while the jaws 220 are moved from the unlocked position into the locked position. In the locked position, the jaws 220 preferably load the insertion tool 170 radially inward in the direction of

arrows

302, 303, 307.

Fig. 9 shows the collet of fig. 8 with the jamming device 300 activated. To activate the jamming device 300, the actuating ring 210 is rotated in the direction of the arrow 312 or further, with the insertion tool 170 centered. Here, the friction disc 270 is compressed and the blocking element 280 blocks the blocking ring 260 by means of a snap-lock connection. Thus constituting a self-locking function whereby the chuck 200 can be prevented from being unlocked accidentally due to shaking and/or vibration.

Figure 10 illustrates one of the preferably three jaws 220 of figure 9 and illustrates an exemplary configuration of the jaws 220. Here, FIG. 10 illustrates an asymmetric arrangement of the first group 221 of

partitions

225 and 227 relative to the second group 231 of

partitions

235 and 237. Fig. 10 furthermore shows the guide section 222, which is located at the top in the illustration, for guiding in the guide groove 246 of the jaw holding fixture 240, and the guide section 224, which is located at the bottom in the illustration, for guiding in the guide groove 245 of the jaw holding fixture 240. Preferably, the upper and

lower guide sections

222, 224 each have a triangular contour 239 for the play-free arrangement of the clamping jaws 220 on one another.

Fig. 11 shows the clamping jaws 220 of fig. 10 and shows a triangular contour 239 formed on the guide section 224 located in the lower position in the illustration, which serves to arrange the clamping jaws 220 on one another without play. Fig. 11 shows a guide section 224, which is preferably T-shaped. Fig. 11 also shows a thread section 229, by means of which the rotary movement of the actuating ring 210 or of the coupling element 250 is transmitted to the clamping jaws 220.

FIG. 12 shows two adjacent clamping jaws 220 or 350, 355, wherein the first set 221 of

spacers

225 and 227 of the first clamping jaw 350 and the second set 231 of

spacers

235 and 237 of the adjacent second clamping jaw 355 preferably cross each other in a region 410. For clarity of illustration, the two clamping jaws 350, 355 are shown spaced apart from one another in fig. 12. Here, FIG. 12 illustrates the asymmetric arrangement of the first and

second sets

221, 231 of

partitions

225, 227, 235, 237 relative to one another.

Fig. 13 shows the two clamping jaws 350, 355 of fig. 12. Here, fig. 13 shows the triangular contour 239 of the

guide sections

222, 224 which are located above and below in the illustration.

Fig. 14 shows the coupling element 250 of fig. 3, 4b, 5b and 6 b. Fig. 14 shows the configuration of the coupling element 250, which has a screw thread 255 for moving the clamping jaws 220 or 350, 355 and a latching section 257, which is formed opposite and by which the coupling element 250 is driven.

Fig. 15 shows the tool receiver 150 of the hand-held power tool 100 of fig. 1 in the form of a collet 400. The clamping head 400 is constructed in accordance with an alternative embodiment, wherein identical parts are numbered identically as in the case of the clamping head 200.

Preferably, the collet 400 has a free first axial end 401 and a second axial end 402, the second end 402 of the collet 400 being arranged on the hand-held power tool 100. Here, the collet 400 preferably has a collet housing 215 in which a tool receptacle 217 for receiving the exemplary insertion tool 170 of fig. 1 is formed. Preferably, for fixing the insertion tool 170, the tool receptacle 217 is provided with at least three clamping jaws 420. The at least three clamping jaws 420, like the clamping head 200, can be moved, preferably by means of the actuating ring 210 arranged on the clamping head housing 215 in a rotationally movable manner, from an unlocking position into a locking position or vice versa.

According to one embodiment, the jaws 420 are disposed entirely within the chuck housing 215 in the locked and unlocked positions by a jaw retention arrangement (440 in fig. 17). The clamping jaws 420 are preferably arranged in the chuck housing 215 in a non-movable manner in the axial direction 405 of the tool receptacle 217. When the clamping jaws 420 are moved from their locking position into their unlocking position or vice versa, they preferably oscillate about an axis of rotation (421 in fig. 17) in a movement plane 409 which is oriented at least approximately perpendicularly to the axial direction 405 of the tool receptacle 217. In this case, a rotation of the actuating ring 210 through a small angle, advantageously 20 °, preferably less than 20 °, moves the clamping jaws 420 from their unlocking position into their locking position or vice versa.

Figure 16 shows the cartridge 400 of figure 15. Here, fig. 16 shows the plane of movement 409 and the clamping jaws 420. Preferably, the clamping jaws 420 are configured in an L-shape or C-shape, but may have any other shape as already explained above.

Fig. 17 shows the cartridge 400 of fig. 16 and illustrates the structure of the cartridge 400. Here, fig. 17 shows the collet 400 with its collet housing 215 and jaw retention 449. Preferably, the jaw retaining arrangement 449 is configured in two parts with a first retaining member 440 and a second retaining member 490. Wherein the clamping jaw 420 is rotatably arranged between the first and second holding

elements

440, 490. The jaw retainer 449 is preferably connected to the cartridge housing 215 of figure 3 by a threaded connection. For this purpose, the first holding element 440 has, on its end face facing the collet housing 215 or the first end 401, a notch 442 assigned to the receptacle 216 of the collet housing 216, and the second holding element 490 has, on its receptacle region 496 facing the first end 401, a notch 498 assigned to the receptacle 216.

The first holding element 440 preferably has loading ledges 445 on its side facing the second end 402, the number of which corresponds to the number of clamping jaws 420, in this case for example three. These loading baffles 445 are preferably configured for loading a spring element 480 arranged in the second holding element 490, so that said spring element is held in its receiving portion 492. The second holding element 490 preferably has a cap-shaped base body with a cylindrical arrangement 494 which has a receiving region 496 on its end facing the first end 401 and a circumferential collar 493 on its end facing the second end 402. The receiving area 496 has a centrally disposed receiving portion 497 for the insertion tool 170.

Furthermore, the receiving region 496 preferably has, between its notches 498, receiving portions 492 associated with the clamping jaws 420 for arranging the spring element 480. The spring element 480 is preferably configured for loading the clamping jaw 420 in the direction of the locking position. In this case, the spring element 480 preferably automatically loads the associated clamping jaw 420 into the locking position. In order to arrange the insertion tool 170, the actuating ring 210 must be loaded against the spring force of the spring element 480, and the actuating ring 210 is then automatically or autonomously moved into the locking position, without the user of the hand-held power tool 100 having to twist the actuating ring 210. Preferably, the spring element 480 is configured as a torsion spring. The peripheral flange 493 is preferably configured as a cover ring. Furthermore, the peripheral flange 493 constitutes an axial retaining element in the direction of the second end 402 for the jamming device 600.

As explained above, the clamping jaw 420 is preferably L-shaped or C-shaped and preferably has a slot 424 for being rotatably arranged between the first and second holding

elements

440, 490. Preferably, the clamping jaws 420 or the notches 424 are associated with the

notches

442 and 498 of the first and second holding

elements

440 and 490, respectively. Preferably, the collet housing 215, the jaw holding device 449 or the first and second holding

elements

440, 490, and the jaws 420 are screwed together by the three-in-view receptacles 216 and the

notches

442, 424, 498 of the collet housing 449. Furthermore, the clamping jaws 420 preferably each have a first loading side 427 and an opposite second loading side 428 in the circumferential direction of the clamping head 400. By means of the loading sides 427, 428, the clamping jaw 420 is loaded by the coupling element 450 to move from the unlocked position into the locked position or vice versa. The clamping jaw 420 has a plurality of teeth 429 on its side 426 facing the tool receptacle 217 and loading the insertion tool 170.

According to one embodiment, the coupling element 450 is configured for converting a rotational movement of the handling ring 210 into a locking movement and/or an unlocking movement of the clamping jaws 420. The coupling element 450 preferably has an annular base 452 with notches 456, the number of which corresponds to the number of clamping jaws 420. Here, the notches 456 are designed for the sectional arrangement of the clamping jaws 420. Furthermore, the slot 456 preferably forms a movable partition 454 which is designed to load the clamping jaw 420 on its

loading side

427, 428 during a rotational movement of the control ring 210, wherein the clamping jaw 420 pivots about its rotational axis 421. Here, the moving diaphragm 454 has first and second loading sides 457, 459. In this case, when the actuating ring 210 is twisted in the counterclockwise direction 407 in fig. 17, the second loading side 459 loads the loading side 428 of the associated clamping jaw 420, and when the actuating ring 210 is twisted in the clockwise direction 408, the first loading side 457 loads the loading side 427 of the associated clamping jaw 420.

Preferably, the clamping jaws 420 are loaded into the locked position when the handling ring 210 is twisted in the counterclockwise direction 407 in fig. 17, and the clamping jaws 420 are loaded into the unlocked position when the handling ring 210 is twisted in the clockwise direction 408 in fig. 17. It is to be noted, however, that it is also possible for the clamping jaws 420 to be loaded into the locking position when the actuating ring 420 is twisted in the clockwise direction 408 in fig. 17 and, analogously, for the clamping jaws 420 to be loaded into the unlocking position when the actuating ring 420 is twisted in the counterclockwise direction 407 in fig. 17.

Furthermore, the coupling element 450 is preferably operatively connected to the blocking device 600 by a latching connection on its side facing the second end 402. For this purpose, the coupling element 450 preferably has a latching section 458.

The jamming device 600 is preferably configured for preventing inadvertent and/or autonomous rotation of the manipulation ring 210. The jamming device 600 preferably has a jamming ring 460, a friction disc 470 and the jamming element 280 of fig. 3. According to one embodiment, the snap ring 460 preferably has an inner ring and an

outer ring

461, 465, which are preferably connected to each other in a rotationally fixed manner. However, the inner and

outer rings

461, 465 may also be constructed in one piece. The inner ring 461 here preferably has, on its end facing the first end 401, a latching contour 462 assigned to the latching section 458 of the coupling element 450. Outer ring 465 preferably has at least one, preferably a plurality of positioning elements 467 on its outer circumference, which are configured such that they can be arranged between two adjacent positioning segments 212 of manipulation ring 210 of fig. 3. Preferably, the snap ring 460 or the outer ring 465 is fixedly arranged in the actuating ring 210 by means of a press connection. Furthermore, outer ring 465 has, on its end facing second end 402, a second detent contour 466 formed in the circumferential direction of detent ring 460. Preferably, the second detent contour 466 is in operative connection with the detent element 280 of fig. 3.

As explained above, the detent element 280 preferably has an annular base body with at least one, in the illustration three detent elements 282. Preferably, the friction disc 470 is disposed between the snap ring 460 and the blocking element 280. Here, the friction disc 470 is preferably compressible and preferably has a large rotational friction.

Fig. 18 shows the clamping head 400 of fig. 15 to 17 in the unlocked or completely open position. In the fully open position, the jaws 420 release the tool receiver 217 and the receiver 497 of the second retaining element 490 of the jaw retaining arrangement 449. In this position, the insertion tool 170 may be disposed in the tool receptacle 217 or receptacle 497. Preferably, the collet 400 is configured for disposal of an insertion tool 170 having a diameter of 0.8mm to 13mm, but may also be configured for receipt of a smaller or larger diameter insertion tool.

Figure 19 shows the cartridge 400 of figure 18 in a locked or partially closed position. In the partially closed position, the clamping jaws 420 are swung towards the tool receptacle 217 by rotation of the operating ring 210.

Fig. 20 shows the cartridge 400 of fig. 18 and 19 in a fully closed position. In the fully closed position, the jaws 220 rest against each other. In the illustration, the clamping jaws 420 rest against one another at their edges 599 assigned to the tool receptacle 217.

Figure 21 shows the collet 400 in the fully closed position of figure 20, with the collet housing 215 and jaw retention 449 shown transparently for better illustration. Fig. 21 shows the arrangement of a coupling element 450 with a slot 456 and a clamping jaw 420 arranged in the slot 456. To move the clamping jaws 420 from the locked position into the unlocked position, the actuating ring 210 is rotated, as explained above, preferably in the counterclockwise direction 407, wherein the moving diaphragm 454 loads the loading side 428 of each clamping jaw 420 by means of its second loading side 459. Here, the clamping jaw 420 is rotated about its axis of rotation 421 in the direction of arrow 504 into the unlocked position.

Fig. 22 illustrates the jamming device 600 of fig. 17. Fig. 22 shows the latching contour 462 of the latching ring 460 or of the inner ring 461. In the illustration, the latching contour 462 is designed ramp-like, but can also have any other shape, wherein the shape must be assigned to the latching section 458 of the coupling element 450. Fig. 22 furthermore shows an outer ring 465 of the snap-in ring 460 with a detent element 467, wherein, as explained above, the detent element 467 can be arranged between two adjacent detent sections 212 of the actuating ring 210 of fig. 3 for rotationally fixed connection to the actuating ring 210. Fig. 22 also shows a detent element 280, which is in operative connection with a detent contour 466 by means of its detent element 282. Furthermore, a catch disk 470 is shown, which is arranged between the catch ring 460 and the catch element 280.

Fig. 23 shows the collet 400 in the locked position, wherein the collet housing 215, the first retaining element 440, the coupling element 450, and the manipulation ring 210 are shown transparently for better illustration. Here, fig. 23 shows the arrangement of the spring element 480 in the notch 492 of the second holding element 490 of the jaw holding device 449. In this case, the spring element 480 is loaded into the groove 492, as described above, by the associated loading diaphragm 445 of the first holding element 440.

Fig. 24 shows the collet 400 of fig. 23, wherein the collet housing 215 and the first retaining element 440 are not shown for better illustration. Fig. 24 shows the arrangement of the spring elements 480 associated with the clamping jaws 420. In this case, the leg 598 associated with the spring element 480 preferably acts on the side 426 of the clamping jaws 420 facing the tool receptacle 217. The spring element 480 is preferably designed such that: to deploy and/or remove the insertion tool 170, the collet 400 must be loaded by a user into the unlocked position, and the collet 400 automatically loads the jaws 420 into the locked position.

Fig. 25 shows the collet 400 of fig. 23 in an unlocked position in which the loading side 428 of the jaws 420 abuts the second loading side 459 of the movable partition 454 of the first coupling element 450. Fig. 25 shows the latching connection between the latching section 458 of the coupling element 450 and the latching contour 462 of the latching ring 460 or of the inner ring 461.

Fig. 26 shows the clamp 400 of fig. 25 in a locked position in which the loading sides 427 of the clamping jaws 420 abut the first loading side 457 of the movable diaphragm 454 of the first coupling element 450. Fig. 26 shows a latching connection between the latching section 458 of the coupling element 450 and the latching contour 462 of the latching ring 460 or of the inner ring 461. Here, the friction disc 470 is compressed by the rotation of the manipulation ring 210 or the click ring 460.

Claims

1. A chuck (200; 400) for a hand-held power tool (100), having a chuck housing (215) in which a tool receptacle (217) for receiving a plug-in tool (170) is formed, wherein the tool receptacle (217) has at least three clamping jaws (220; 420) for securing the plug-in tool (170), and wherein the at least three clamping jaws (220; 420) can be moved by a control ring (210) at least from an unlocked position, in which the plug-in tool (170) can be removed from the tool receptacle (217), into a locked position, in which the plug-in tool (170) is secured in the tool receptacle (217), on the chuck housing (215), wherein the at least three clamping jaws (220; 420) are held by clamping jaw holding means in the locked position and the unlocked position Arranged completely in the chuck housing (215) in position and arranged in the chuck housing (215) in a non-movable manner in the axial direction (205; 405) of the tool receiver (217), the actuating ring (210) being provided with a coupling element (250; 450) which is designed to convert a rotary movement of the actuating ring (210) into a locking and/or unlocking movement of the at least three clamping jaws (220; 420), the coupling element having a latching section on the side facing away from the clamping jaws, a blocking device being provided which has a latching ring with a ramp-shaped first latching contour which is assigned to the latching section and by means of which a rotary movement of the actuating ring can cause the latching ring to move in the axial direction in a direction away from the coupling element, and a compressible friction disk arranged therebetween, whereby the friction disc is compressed and the jamming element jams the jamming ring.

2. The chuck according to claim 1, wherein the coupling element (250; 450) is configured for moving the at least three clamping jaws (220; 420) in a movement plane (209; 409) oriented at least approximately perpendicularly to an axial direction (205; 405) of the tool receptacle (217) or for pivoting about a rotational axis (421) in the movement plane (209; 409).

3. A chuck according to claim 2, wherein the jaw retaining arrangement has rectilinear guide slots (245, 246) associated with the at least three jaws (220) in the radial direction of the chuck housing (215) for the movement of the jaws (220).

4. A chuck according to claim 2 or 3, wherein the coupling element (250) has a helical thread (255) on its side facing the at least three jaws (220), and wherein the at least three jaws (220) each have a thread section (229) associated with the helical thread (255) on their side facing the coupling element (250).

5. A chuck according to claim 2 or 3, wherein the at least three jaws (220) each have, in the circumferential direction of the chuck housing (215), a first set (221) of partitions (225) on a first side and a second set (231) of partitions (235) on a second side opposite the first side, wherein the partitions of the first set (221) are arranged asymmetrically with respect to the partitions of the second set (231).

6. The chuck according to claim 5, wherein the partitions (225 and 227) of the first set (221) of partitions and the partitions (235 and 237) of the second set (231) of partitions are configured such that in the locked position, the partitions (225 and 227) of the first set (221) of the first jaw (350) and the partitions (235 and 237) of the second set (231) of the adjacent second jaw (355) intersect one another.

7. A chuck according to claim 2 or 3, wherein each of the at least three jaws (220) has a triangular profile (239) on its end facing the tool receiving portion (217), such that in a fully closed position of the at least three jaws (220), in which the insertion tool (170) cannot be arranged in the tool receiving portion (217), the at least three jaws (220) rest on each other without play.

8. Chuck according to claim 2, characterized in that the at least three clamping jaws (420) are L-shaped or C-shaped for pivoting about their rotational axis (421).

9. The chuck according to claim 8, wherein the jaw retaining arrangement is configured in two parts with a first retaining element (440) and a second retaining element (490), wherein the at least three jaws (420) are rotatably arranged between the first retaining element (440) and the second retaining element (490).

10. The chuck according to claim 9, wherein the at least three clamping jaws (420) are spring-loaded, wherein the second holding element (490) has receptacles (492) assigned to the at least three clamping jaws (420) for the arrangement of spring elements (480).

11. A chuck according to any one of claims 1 to 3, wherein said catch device is operatively connected to said coupling element (250; 450) by a snap-lock connection and is configured to prevent unintentional and/or autonomous twisting of said operating ring (210).

12. A chuck for use with a manual or powered driver as stated in any one of claims 1 to 3, wherein said jaw retention means is configured such that: the twisting of the actuating ring (210) by an angle of 20 DEG or less moves the at least three clamping jaws (220; 420) from the unlocking position into the locking position or vice versa.

13. Hand-held power tool (100) having a chuck (200; 400) according to one of claims 1 to 12.