CN209936841U - Chuck assembly and hand-held machine tool using same - Google Patents

Abstract

The utility model relates to a chuck component and a hand-held machine tool, wherein the chuck component comprises a hammer chuck provided with a rotating sleeve and a drill chuck matched and connected with the rotating sleeve, a hammer head is accommodated in the rotating sleeve, and the drill chuck comprises a core body and a control sleeve; the hammer chuck comprises a sliding sleeve, an elastic piece abutted against the sliding sleeve and a fixing unit arranged between the core body and the sliding sleeve; the chuck assembly further comprises a locking mechanism and a limiting mechanism, the sliding sleeve can be moved to a second position from a first position through a middle position in an operable mode, when the sliding sleeve is located at the first position, the locking mechanism allows the control sleeve to rotate relative to the core body, when the hammer head is contained in the rotating sleeve, when the sliding sleeve is moved to the middle position from the second position along the axis of the rotating sleeve, the limiting mechanism prevents the sliding sleeve from moving to the first position from the middle position, the fixing unit limits the movement stroke of the hammer head along the axial direction of the rotating sleeve, and the locking mechanism limits the control sleeve to rotate relative to the core body. The utility model has the advantages that: the drill chuck does not clamp the hammer head in a hammer or hammer drill mode, the stability is good, and the working efficiency is high.

Description

Chuck assembly and hand-held machine tool using same

Technical Field

The utility model relates to a chuck subassembly and use hand-held type machine tool of this chuck subassembly.

Background

At present, a small electric hammer generally has two functional modes, namely a hammer drill mode or a hammer mode, namely, a hammer head is used for punching holes on building materials such as concrete, cement boards, brick walls and the like; the other mode is a drilling mode, namely, a twist drill, a flat drill, a hexagonal handle and other drill bits are used for drilling holes in materials such as wood plates and steel plates or screwing and unscrewing screws and nuts. When the electric hammer is in the drilling mode, the drill bit is generally required to be clamped by a chuck accessory which is matched with the front end of the electric hammer, and the operation mode has great defects, such as: when drilling, the drilling precision is low due to the fact that the tool shakes greatly; the long and poor accessibility of the machine body leads to the failure of working in a narrow space; the accessory is easy to lose and the experience is poor.

The patent publication CN102785229B discloses a dual-purpose chuck device that can both lock the hammer head by the hammer chuck in the hammer drill or hammer mode and lock the drill bit by rotating the chuck sleeve of the drill chuck in the drill mode. Because the dual-purpose chuck device does not consider the arrangement of a device for locking the chuck sleeve in the hammer drill mode or the hammer mode, the chuck sleeve can rotate in the hammer drill mode or the hammer mode, so that the drill chuck clamps the hammer head to influence the normal work of the hammer head.

SUMMERY OF THE UTILITY MODEL

For overcoming the defects of the prior art, the utility model aims to solve the problem of providing a chuck assembly which prevents the rotation of the chuck sleeve under the hammer drill mode and leads to clamping the hammer head.

The utility model provides a chuck component, which comprises a hammer chuck provided with a rotary sleeve and a drill chuck matched and connected with the rotary sleeve; the drill chuck comprises a chuck core body and a control sleeve sleeved with the chuck core body, wherein the chuck core body is provided with a second through hole for the hammer head to pass through; the hammer chuck comprises a sliding sleeve sleeved on the rotating sleeve, an elastic piece abutted against the sliding sleeve and a fixing unit arranged between the chuck core body and the sliding sleeve; the chuck assembly further comprises a locking mechanism and a limiting mechanism arranged between the rotating sleeve and the sliding sleeve, the sliding sleeve can move to a second position from a first position to a middle position along the axis of the rotating sleeve in an operable mode, when the sliding sleeve is located at the first position, the locking mechanism allows the control sleeve to rotate relative to the chuck core body, when the hammer head is contained in the first through hole, the limiting mechanism prevents the sliding sleeve from further moving to the first position from the middle position when the sliding sleeve moves to the middle position from the second position along the axis of the rotating sleeve under the action force of the elastic piece, the fixing unit limits the movement stroke of the hammer head along the axial direction of the rotating sleeve, and the locking mechanism limits the control sleeve to rotate relative to the chuck core body.

Preferably, the fixing unit includes at least one locking member and a first receiving hole, the first receiving hole is provided on the chuck body, the sliding sleeve limits the movement of the locking member in the first receiving hole in the radial direction of the swivel sleeve when the sliding sleeve is at the first position or at the intermediate position, and the sliding sleeve allows the movement of the locking member in the first receiving hole in the radial direction of the swivel sleeve when the sliding sleeve is at the second position.

Preferably, the rotating sleeve is provided with a second accommodating hole, and the projection of the second accommodating hole and the projection of the first accommodating hole in the axial direction of the rotating sleeve coincide.

Preferably, the locking member is a steel ball or a locking member.

Preferably, the fixing unit further comprises a first stop member nested in the sliding sleeve, the first stop member abutting against the locking member when the sliding sleeve is in the first position and the intermediate position to limit the radial movement of the locking member along the rotating sleeve, and the first stop member disengaging from the locking member when the sliding sleeve is in the second position to allow the locking member to move along the radial direction of the rotating sleeve.

Preferably, the first stopper is provided with a first groove which is in form fit with the locking member, the locking member is engaged with the first groove when the slide sleeve is in the first position or the intermediate position, and the locking member is disengaged from the first groove when the slide sleeve is in the second position.

Preferably, the limiting mechanism includes at least one limiting member and a first limiting hole, the first limiting hole is disposed on the chuck core, when the sliding sleeve is at the first position or the intermediate position, the sliding sleeve limits the limiting member to move in the first limiting hole along the radial direction of the rotating sleeve, and when the sliding sleeve is at the second position, the sliding sleeve allows the limiting member to move in the first limiting hole along the radial direction of the rotating sleeve.

Preferably, a second limiting hole is formed in the rotating sleeve, and the projection of the second limiting hole and the projection of the first limiting hole in the axial direction of the rotating sleeve coincide.

Preferably, an included angle formed by a connecting line of the center of the first limiting hole and the center of the first accommodating hole along the axis of the rotating sleeve is 135 degrees.

Preferably, the limiting member is a steel ball or a locking member.

Preferably, the limiting mechanism further comprises a second stop member nested in the sliding sleeve, the second stop member abuts against the limiting member when the sliding sleeve is located at the first position or the intermediate position, so as to limit the limiting member to move along the radial direction of the rotating sleeve, and the second stop member is disengaged from the limiting member when the sliding sleeve is located at the second position, so as to allow the limiting member to move along the radial direction of the rotating sleeve.

Preferably, the second stop member is provided with a second groove which is matched with the limiting member in a shape, when the sliding sleeve is in the middle position, the limiting member is meshed with the second groove, and when the sliding sleeve is in the first position and the second position, the limiting member is disengaged from the second groove.

Preferably, a steel sleeve is nested in the sliding sleeve, and the first stop piece and the second stop piece are integrally arranged on the steel sleeve.

Preferably, the drill chuck includes a chuck nut mounted on the outer surface of the chuck core, and the control sleeve is operable to drive the jaws to move in the direction of the axis of the rotary sleeve through the chuck nut.

Preferably, the locking mechanism includes a first toothed ring disposed on an outer surface of the collet nut and a second toothed ring disposed on an outer surface of the collet core, the first toothed ring being disengaged from the second toothed ring when the sliding sleeve is in the first position or the second position, the control sleeve being permitted to rotate relative to the collet core, the first toothed ring being engaged with the second toothed ring when the sliding sleeve is in the intermediate position, the control sleeve being restricted from rotating relative to the collet core.

Preferably, the locking mechanism includes a spacer ring gear disposed in the cartridge body and a clutch ring gear rotatably disposed in the sliding sleeve, the spacer ring gear being disengaged from the clutch ring gear when the sliding sleeve is in the first position, the control sleeve being permitted to rotate relative to the cartridge body, the spacer ring gear being engaged with the clutch ring gear when the sliding sleeve is in the intermediate position, the control sleeve being restricted from rotating relative to the cartridge body.

Preferably, the locking mechanism comprises a core toothing provided on the outer surface of the cartridge core, a driving toothing nested inside the control sleeve and a control toothing nested on the outer surface of the control member of the outer surface of the cartridge core, the driving toothing being disengaged from the core toothing when the sliding sleeve is in the first position, the control sleeve being allowed to rotate relative to the cartridge core, the driving toothing, the control toothing and the core toothing being simultaneously engaged when the sliding sleeve is in the second or intermediate position, the control sleeve being restrained from rotation by said cartridge core.

Preferably, the control sleeve is axially fixedly connected with the sliding sleeve through the connecting unit.

Preferably, the connecting unit is provided as a retainer ring, at least one protrusion is arranged on the inner surface of the retainer ring, at least one through hole is arranged on the outer surface of the control sleeve, an annular groove is arranged on the outer surface of the sliding sleeve, and the protrusion penetrates through the through hole and then is matched with the annular groove.

Preferably, the rotary sleeve is fixedly connected with the drill chuck.

The utility model provides a hand-held machine tool, it includes prevents under the hammer drill mode that the rotatory chuck subassembly that leads to pressing from both sides tight tup of chuck cover.

A hand-held machine tool comprises a housing and a motor arranged in the housing, and further comprises a chuck assembly arranged at one end of the housing, and a rotating sleeve receives rotary power output by the motor.

Compared with the prior art, the beneficial effects of the utility model are that: the drill chuck does not clamp the hammer head in a hammer or hammer drill mode, the stability is good, the working efficiency is high, the tool using the chuck assembly has a compact structure, the machine body is short and short, and the service life is long.

Drawings

Above the utility model discloses an aim at, technical scheme and beneficial effect can realize through following attached drawing:

fig. 1 is a cross-sectional view of an electric hammer for mounting a chuck assembly according to a first embodiment of the present invention.

Figure 2 is an exploded view of the chuck assembly of the first embodiment of the present invention.

Figures 3 and 4 are schematic views of the steel sleeve in the chuck assembly of the first embodiment of the present invention.

Figure 5 is a cross-sectional view of the locking member of the cartridge assembly in an initial position according to the first embodiment of the present invention.

Figure 6 is a cross-sectional view of the jaw assembly taken along the direction a-a in a first embodiment of the present invention.

Figure 7 is a cross-sectional view of the jaw assembly taken along the direction B-B in a first embodiment of the present invention.

Fig. 8 and 9 are cross-sectional views of the locking member and the limiting member when the jaws are maximally opened according to the first embodiment of the present invention.

Fig. 10 is a schematic view of a hammer head according to the present invention.

Fig. 11 and 12 are sectional views of the locking member and the stopper when the hammer head is just inserted in the first embodiment of the present invention.

Fig. 13 is a sectional view of the locking member when the hammer head is further inserted according to the first embodiment of the present invention.

Fig. 14 is a cross-sectional view of the collet assembly in the direction C-C as the insertion of the hammer head is continued in the first embodiment of the present invention.

Fig. 15 is a sectional view of the collet assembly in the direction D-D as the insertion of the hammer head is continued in the first embodiment of the present invention.

Fig. 16 is a sectional view of the locking member in the first embodiment of the present invention with the sliding sleeve in the intermediate position.

Figure 17 is a cross-sectional view of the jaw assembly taken along the direction E-E with the sliding sleeve in the intermediate position according to the first embodiment of the present invention.

Figure 18 is a cross-sectional view of the jaw assembly taken along the direction F-F with the sliding sleeve in the intermediate position according to the first embodiment of the present invention.

Fig. 19 is a cross-sectional view of an electric hammer with a collet assembly mounted thereon according to a second embodiment of the present invention.

Figure 20 is an exploded view of a cartridge assembly according to a second embodiment of the present invention.

Fig. 21 is a diagram showing a positional relationship between the spacer ring gear and the clutch ring gear when the sliding sleeve is located at the first position according to the second embodiment of the present invention.

Fig. 22 is a diagram showing the positional relationship between the spacer ring gear and the clutch ring gear when the sliding sleeve is located at the second position according to the second embodiment of the present invention.

Fig. 23 is a diagram showing the positional relationship between the spacer ring gear and the clutch ring gear when the sliding sleeve is located at the intermediate position according to the second embodiment of the present invention.

Figure 24 is an exploded view of a chuck assembly according to a third embodiment of the present invention.

Fig. 25 is a schematic view of the third embodiment of the present invention in which the first resilient member is mounted on the collet nut.

Figure 26 is a cross-sectional view of a chuck core in a third embodiment of the present invention.

Fig. 27 is a positional relationship diagram of the driving ring gear, the control ring gear and the core ring gear when the clamping jaw is at the first position according to the third embodiment of the present invention.

Fig. 28 is a schematic view of the driving ring gear, the control ring gear and the core ring gear when the clamping jaw is in the first position according to the third embodiment of the present invention.

Fig. 29 is a positional relationship diagram of the driving ring gear, the control ring gear and the core ring gear when the jaw holes are opened to the maximum in the third embodiment of the present invention.

Fig. 30 is a schematic view of the driving ring gear, the control ring gear and the core ring gear when the jaw holes are opened to the maximum in the third embodiment of the present invention.

Fig. 31 is a positional relationship diagram of the driving ring gear, the control ring gear and the core ring gear when the sliding sleeve is located at the second position according to the third embodiment of the present invention.

Fig. 32 is a schematic view of the third embodiment of the present invention, wherein the driving gear ring, the control gear ring and the core gear ring are arranged when the sliding sleeve is located at the second position.

Fig. 33 is a positional relationship diagram of the driving ring gear, the control ring gear and the core ring gear when the sliding sleeve is located at the intermediate position according to the third embodiment of the present invention.

Fig. 34 is a schematic view of the driving ring gear, the control ring gear and the core ring gear when the sliding sleeve is located at the middle position according to the third embodiment of the present invention.

Figure 35 is an exploded view of a chuck assembly according to a fourth embodiment of the present invention.

Fig. 36 is a schematic view of the cartridge assembly according to the fourth embodiment of the present invention.

Fig. 37 is a sectional view of a cartridge body in a fourth embodiment of the present invention.

Figure 38 is a schematic view of the intermediate member, jaws and sleeve in a fourth embodiment of the invention with the jaws in the first position.

Figure 39 is a schematic view of the intermediate member, jaws and sleeve as the jaws of the fourth embodiment of the invention begin to extend into the intermediate member.

Fig. 40 is a schematic view of the intermediate member, the clamping jaw and the rotating sleeve when the projection on the intermediate member moves between two teeth of the rotating sleeve according to the fourth embodiment of the present invention.

Fig. 41 is a schematic view of the middle member, the clamping jaw and the rotating sleeve when the sliding sleeve is located at the second position according to the fourth embodiment of the present invention.

Detailed Description

As shown in fig. 1, the electric hammer 1 in the first embodiment includes a housing 11 and a motor 12 housed in the housing 11, and a chuck assembly 10 is provided at one end of the housing 11, the chuck assembly 10 being configured to receive a working head. The utility model discloses in, be in hammer or hammer drill mode at the electric hammer, the working head adopts the tup, is in under the brill mode at the electric hammer, and the working head adopts the drill bit.

As shown in fig. 1 and 2, the chuck assembly 10 includes a hammer chuck having a rotary sleeve 111, and a drill chuck coupled to the rotary sleeve 111, wherein the rotary sleeve 111 is hollow and has a first through hole 1111 for receiving a hammer head. The drill chuck includes a chuck body 112 coupled to the rotary sleeve 111, in this embodiment, a rear end surface of the chuck body 112 and a front end surface of the rotary sleeve 111 are press-fitted in an interference manner, and of course, other connection modes such as a threaded connection and the like which can achieve no relative movement between the chuck body 112 and the rotary sleeve 111 may also be adopted. The cartridge core 112 is provided with a second through hole 1121 through the first through hole 1111 for passing a hammer therethrough, and a jaw hole provided along the circumferential direction of the cartridge core 112 and communicating with the second through hole 1121, and the jaw hole is configured to receive a jaw 1123. In this embodiment, the number of jaw holes and jaws is three. When the drill bit is inserted, the drill bit is clamped through the combined action of the three clamping jaws, the drill bit is positioned, and the drill bit is prevented from loosening.

In this embodiment, the drill chuck further includes a control sleeve that is received in the chuck core 112. The control sleeve includes a collet sleeve 114 and a collet nut 115 fixedly connected to the collet sleeve 114, the collet nut 115 is sleeved on the collet body 112, and the collet sleeve 114 is rotated to enable the collet nut 115 to be engaged with the jaws 1123 and rotate around the axis of the rotating sleeve 111, so as to drive the jaws 1123 to move along the axis of the rotating sleeve. An insert 116 is provided around the outside of the cartridge body 112 to prevent the ram head from wearing the cartridge body during movement. A collar 126 is provided between the collet core 112 and collet sleeve 114.

The hammer holder includes a sliding sleeve 117 that is received over the swivel sleeve 111, the sliding sleeve 117 being operable to move along the axis of the swivel sleeve 111 from a first position to a second position via an intermediate position. The inner surface of the sliding sleeve 117 is also nested with a steel sleeve 123, the steel sleeve 123 is nested on the chuck core body 112, three special-shaped holes are arranged on the steel sleeve 117 for the three clamping jaws to pass through, and relative movement between the steel sleeve 123 and the chuck core body 112 in the circumferential direction is avoided. The annular protrusion 123a arranged on the outer surface of the steel sleeve 123 is matched with the annular groove 117a arranged on the corresponding part of the sliding sleeve 117, so that the sliding sleeve 117 and the steel sleeve 123 are fixedly connected together relatively, and the sliding sleeve 117 and the steel sleeve 123 do not move relatively in the axial direction and the circumferential direction. And because there is no relative movement in the circumferential direction between the steel sleeve 123 and the collet core 112, there is no relative movement in the circumferential direction between the sliding sleeve 117 and the collet core 112.

The hammer holder further includes an elastic member disposed between the sliding sleeve 117 and the rotating sleeve 111, and the elastic member restricts axial movement of the locking member 119 and the limiting member 121 to be held radially inside the steel sleeve 123. The resilient member is a compression spring 124.

The chuck assembly 10 further comprises a fixing unit, a locking mechanism and a limiting mechanism, wherein the fixing unit is arranged between the chuck core body 112 and the sliding sleeve 117, the limiting mechanism is arranged between the rotating sleeve and the sliding sleeve, when the sliding sleeve 117 is located at a first position, the locking mechanism allows the control sleeve to rotate relative to the chuck core body 112, when the sliding sleeve 117 is located at a second position, the hammer head is accommodated in the first through hole 1111, the sliding sleeve 117 moves from the second position to an intermediate position along the axis of the rotating sleeve 111 under the action of an elastic piece, at the moment, the limiting mechanism prevents the sliding sleeve 117 from further moving from the intermediate position to the first position, the fixing unit limits the movement stroke of the hammer head along the axial direction of the rotating sleeve, and the.

The fixing unit includes a first receiving hole 1124 provided on the cartridge core 112 and a locking member 119 protruding radially from the first receiving hole 1124. The sliding sleeve 117 limits the movement of the locking member 119 in the first receiving hole 1124 in the radial direction of the rotating sleeve 111 when the sliding sleeve 117 is at the first position or the intermediate position, and the sliding sleeve 117 allows the movement of the locking member 119 in the first receiving hole 1124 in the radial direction of the rotating sleeve 111 when the sliding sleeve 117 is at the second position. The rotary sleeve 111 is provided with a second accommodating hole 1112, and the projection of the second accommodating hole 1112 and the first accommodating hole 1124 in the axial direction of the rotary sleeve 111 are overlapped.

The fixing unit further comprises a first stop 1231, the first stop 1231 being nested within the sliding sleeve 117, the first stop 1231 abutting the locking member 119 when the sliding sleeve 117 is in the first position and the intermediate position, thereby limiting the radial movement of the locking member 119 along the rotating sleeve 111, and the first stop 1231 disengaging the locking member 119 when the sliding sleeve 117 is in the second position, thereby allowing the locking member 119 to move along the radial direction of the rotating sleeve 111.

As shown in fig. 3, the first stopper 1231 is provided with a first groove 1231a which is form-fitted with the locking member 119, and the first groove 1231a blocks the locking member 119 from completely leaving the accommodating space in the radial direction of the rotary sleeve 111. The locking member 119 is engaged with the first groove 1231a when the sliding sleeve 117 is at the intermediate position, and the locking member 119 is disengaged from the first groove 1231a when the sliding sleeve 117 is at the first position and the second position.

The chuck assembly 10 further includes a limiting mechanism disposed between the rotating sleeve 111 and the sliding sleeve 117, the limiting mechanism includes a first limiting hole 1125 and a limiting member 121, the first limiting hole 1125 is disposed on the chuck core 112, and the limiting member 121 protrudes from the first limiting hole 1125 along the radial direction. When the sliding sleeve 117 is at the first position or the intermediate position, the sliding sleeve 117 limits the movement of the position-limiting member 121 in the first position-limiting hole 1125 along the radial direction of the rotating sleeve 111, and when the sliding sleeve 117 is at the second position, the sliding sleeve 117 allows the movement of the position-limiting member 121 in the first position-limiting hole 1125 along the radial direction of the rotating sleeve 111. The rotating sleeve 111 is provided with a second limiting hole 1113, and the projection of the second limiting hole 1113 and the projection of the first limiting hole 1125 in the axial direction of the rotating sleeve 111 coincide.

The limiting mechanism further comprises a second stop 1232 nested in the sliding sleeve 117, when the sliding sleeve 117 is located at the first position or the intermediate position, the second stop 1232 abuts against the limiting member 121, so as to limit the radial movement of the limiting member 121 along the rotating sleeve 111, and when the sliding sleeve is located at the second position, the second stop 1232 is disengaged from the limiting member 121, so as to allow the limiting member 121 to move along the radial direction of the rotating sleeve 111.

As shown in fig. 4, the second stop 1232 is provided with a second groove 1232a matched with the limiting member 121 in shape, and the second groove 1232a blocks the limiting member 121 from completely leaving the accommodating space in the radial direction of the rotating sleeve 111. When the sliding sleeve 117 is at the intermediate position, the limiting member 121 is engaged with the second groove 1232a, and when the sliding sleeve 117 is at the first position and the second position, the limiting member 121 is disengaged from the second limiting hole 1113. The second stop 1232 is further provided with an arc surface 1232b at least partially covering the second groove 1232a, when the sliding sleeve 117 is at the first position, the limiting member 121 is engaged with the arc surface 1232b, and when the sliding sleeve 117 is at the second position and the intermediate position, the limiting member 121 is disengaged from the arc surface 1232 b. And the first and second stoppers 1231 and 1232 are integrally provided on the steel sleeve 123.

In this embodiment, the first receiving hole 1124, the second receiving hole 1112, the first position-limiting hole 1125, and the second position-limiting hole 1113 are all tapered holes, and the width of the tapered holes decreases from top to bottom. Preferably, the center of the first locating hole 1125 forms an included angle of 135 degrees or 225 degrees with the center line of the first receiving hole 1124 along the axis of the rotating sleeve 111.

In the present embodiment, the locking member 119 and the limiting member 121 are specifically steel balls, but it is also possible to use rollers, cylindrical pins, and other elements as the locking member 119 and the limiting member 121. The locking member 119 has a diameter larger than that of the stopper member 121. Of course, the locking member 119 and the limiting member 121 may have the same or different diameters.

The collet assembly 10 further includes a locking mechanism including a first gear ring 1151 disposed on an outer surface of the collet nut 115 and a second gear ring 1171 nested within the sliding sleeve 117. When the sliding sleeve 117 is in the first and second positions, the first ring gear 1151 is disengaged from the second ring gear 1171 and the control sleeve is allowed to rotate relative to the cartridge core 112, and when the sliding sleeve 117 is in the intermediate position, the first ring gear 1151 is engaged with the second ring gear 1171 and the control sleeve is restricted from rotating relative to the cartridge core 112.

The end of the collet assembly 10 close to the hammer head is further provided with a dust cover 125, the dust cover 125 is an annular rubber member, and a hole is formed in the center to accommodate the hammer head to penetrate through, so that the effect of sealing and preventing dust is achieved.

The process of inserting the hammer head into the cartridge assembly in the present embodiment will be described in detail below with reference to fig. 4 to 16.

Fig. 5, 6, and 7 show the cartridge assembly 10 in a state where the hammer 13 is not attached. When the sliding sleeve 117 is located at the first position, the clamping jaw 1123 partially extends out of the clamping jaw hole, and the locking member 119 is at least partially received in the first receiving hole 1124, and the vertex thereof is engaged with the first groove 1231a of the first stopping member 1231, so as to limit the radial movement of the locking member 119 along the rotating sleeve 111; the limiting member 121 is at least partially received in the first limiting hole 1125, and the vertex thereof engages with the arc surface 1232b of the second stop member 1232, so as to limit the radial movement of the limiting member 121 along the rotating sleeve 111.

Referring to fig. 8 and 9, before the hammer head 13 is installed, the collet sleeve 114 is rotated so that the jaw holes are opened to the maximum and the three jaws are retracted into the jaw holes.

As shown in fig. 10, the hammer 13 is substantially a long column, and has at least one, in this embodiment two, locking grooves 13a that can at least partially receive the locking member 119. The hammer 13 further has a mounting portion 13b into which the rotary sleeve 111 is inserted, and the mounting portion 13b is provided with two locking grooves (not shown) corresponding to the two protrusions of the rotary sleeve 111.

As shown in fig. 11 and 12, the sliding sleeve 117 is pulled away from the chuck assembly 10, the hammer 13 is inserted into the rotating sleeve 111 after the sliding sleeve 117 moves from the first position to the second position, and the locking member 119 is ejected out of the first receiving hole 1124 by the hammer 13 and is disengaged from the first groove 1231a of the first stop member 1231; the stopper 121 is also pushed out of the second receiving hole 1125 by the hammer 13 and is disengaged from the arc surface 1232b of the second stopper 1232.

Fig. 13, 14 and 15 show the movement state of the locking member 119 and the limiting member 121 after the hammer 13 is inserted. At this time, the locking member 119 is just fallen into the locking groove 13a of the hammer 13, and the spherical surface of the stopper 121 abuts against the surface of the hammer 13.

As shown in fig. 16, 17 and 18, at this time, the sliding sleeve 117 is released, the steel sleeve 123 sleeved with the sliding sleeve 117 moves axially toward the hammer 13 along with the sliding sleeve 117 under the action of the elastic force of the compression spring 124, one end of the locking member 119 falls into the slot 13a of the hammer, and the other end of the locking member 119 is engaged with the first groove 1231a of the first stopper 1231, so that the locking member 119 is limited to move radially along the axis of the rotary sleeve 111, and the movement stroke of the hammer 13 along the axial direction of the rotary sleeve 111 is locked. One end of the stopper 121 abuts against the surface of the hammer 13, and the other end thereof engages with the second groove 1232a of the second stopper 1232. Since the stopper 121 falls into the second groove 1232a, the steel sleeve 123 is prevented from moving axially, and since the steel sleeve 123 is sleeved on the sliding sleeve 117, the sliding sleeve 117 is locked axially, cannot return to the first position, and can only be clamped at an intermediate position between the first position and the second position. Meanwhile, the first ring gear 1151 of the collet nut 115 mounted on the collet core 112 is engaged with the second ring gear 1171 fitted in the sliding sleeve 117, so that the collet nut 115 and the sliding sleeve 117 do not move relative to each other in the circumferential direction. And because the sliding sleeve 117 and the collet body 112 do not move relative to each other in the circumferential direction, the collet nut 115 and the collet body 112 do not move relative to each other in the circumferential direction. Thus, even if an operator mistakenly operates the collet sleeve 114 when using the hammer 13, the hammer 13 cannot be clamped by the rotation of the collet sleeve 114, and the hammering efficiency is prevented from being greatly reduced after the hammer 13 is clamped.

Referring to fig. 19 to 23, the chuck assembly of the second embodiment of the present invention has a structure similar to that of the first embodiment, and for convenience of description, the same structure is not repeated, and different structures are described in detail below.

As shown in fig. 19, the present invention provides a hand-held machine tool, which is specifically an electric hammer 2, wherein the electric hammer 2 has substantially the same internal structure as the electric hammer 1, and includes a housing 11 and a motor 12 disposed in the housing 11, the electric hammer 2 further includes a chuck assembly 20 disposed at one end of the housing 11, and the chuck assembly 20 includes a hammer chuck having a rotary sleeve 211 and a drill chuck coupled to the rotary sleeve. The rotary power output by the motor 12 is transmitted to the rotary sleeve 211, and the rotary sleeve 211 drives the hammer 13 to work.

As shown in fig. 19 and 20, in the present embodiment, the control sleeve includes a collet sleeve 214 and a collet nut 215 fixedly connected to the collet sleeve 214, the collet nut 215 is sleeved on the collet core 212, and the collet sleeve 214 is rotated to cause the collet nut 215 to engage the jaws 2123 and rotate about the axis of the rotating sleeve 211, thereby driving the jaws 2123 to move axially along the rotating sleeve 211. The chuck nut 215 includes a stamping part 215a and a nut sleeve 215b, the stamping part 215a is fixedly connected with the chuck nut 215, the nut sleeve 215b is arranged on the outer surface of the stamping part 215a, and a tooth slot 215c is formed on the nut sleeve 215 b.

A steel sleeve 223 and a plastic piece 223a wrapped on the outer surface of the steel sleeve 223 are nested in the sliding sleeve 217, three baffles 217a are uniformly distributed on the outer surface of the sliding sleeve 217, the baffles 217a penetrate through three holes 217b formed in the outer surface of the sliding sleeve 217 and then abut against the steel sleeve 223, meanwhile, a fixing ring 217c is sleeved outside the sliding sleeve 217 to prevent the baffles 217a from falling off, and the steel sleeve 223 can be effectively prevented from falling off from the sliding sleeve 217.

In this embodiment, the locking mechanism includes a clutch ring gear 2191 and a washer ring gear 2121, the clutch ring gear 2191 is disposed on an inner surface of the clutch 219, the clutch 219 is disposed within a cavity formed by the plastic 223a and the sliding sleeve 217, and the washer ring gear 2121 is fixedly attached to an outer surface of the cartridge core 212. Because one end of the clutch 219 is abutted with the collet sleeve 214 and the other end is abutted with the plastic member 223a, the clutch 219 has no relative movement with the sliding sleeve 217 in the axial direction and has relative rotation with the sliding sleeve 217 only in the circumferential direction. Teeth on the inner surface of the clutch ring gear 2191 are received in the teeth grooves 215c of the nut sleeve 215b, and the teeth of the clutch ring gear 2191 are axially moved in the teeth grooves 215c along with the axial movement of the sliding sleeve 217. When the sliding sleeve 217 is in the first position, the spacer ring gear 2121 is disengaged from the clutch ring gear 2191 and the control sleeve is allowed to rotate relative to the cartridge body 212, and when the sliding sleeve 217 is in the second and intermediate positions, the spacer ring gear 2121 is engaged with the clutch ring gear 2191 and the control sleeve is restricted from rotating relative to the cartridge body 212.

In this embodiment, the elastic member 224 is disposed on the rotating sleeve 211, and the elastic member 224 is connected to the tool housing (not shown) through a support ring 229.

In this embodiment, the fixing unit and the limiting mechanism are the same as those in the first embodiment, and therefore, the details are not described herein.

Fig. 21 shows the spacer ring gear 2121 disengaged from the clutch ring gear 2191 when the sliding sleeve 217 is in the first position.

Fig. 22 shows the clutch ring gear 2191 sliding in the spline 215c in the nut sleeve 215b into engagement with the spacer ring gear 2121 when the sliding sleeve 217 is in the second position.

As shown in fig. 23, when the sliding sleeve 217 is in the middle position, the spacer ring gear 2121 fixedly connected to the chuck core 212 still meshes with the clutch ring gear 2191 sleeved in the sliding sleeve 217. Since the teeth on the clutch ring gear 2191 slide in the tooth grooves 215c of the nut bushing 215b at all times, the collet nut 215 and the clutch ring gear 2191 do not move relative to each other in the circumferential direction. At this time, the spacer ring gear 2121 meshes with the clutch ring gear 2191, and therefore, there is no relative movement in the circumferential direction between the cartridge body 212 and the cartridge nut 215. Thus, if an operator mistakenly operates the collet sleeve 214 when using the hammer 13, the rotation of the collet sleeve 214 cannot drive the rotation of the collet nut 215, and the rotation of the collet sleeve 214 cannot clamp the hammer 13 because there is no relative movement between the collet body 212 and the collet nut 215 in the circumferential direction, thereby preventing the hammering efficiency from being greatly reduced after clamping the hammer 13.

Referring to fig. 24 to 34, the chuck assembly according to the third embodiment of the present invention has a structure similar to that of the first and second embodiments, and for convenience of description, the same structure is not repeated, and different structures are described in detail below.

As shown in fig. 24, the chuck assembly 30 in the third embodiment includes a hammer chuck having a rotary sleeve 311 and a drill chuck coupled to the rotary sleeve 311.

In this embodiment, the hammer chuck includes a first clamping assembly and a sliding sleeve 317 disposed on an outer surface of the first clamping assembly, and the drill chuck includes a second clamping assembly and a chuck sleeve 314 disposed on an outer surface of the second clamping assembly.

The rotating sleeve 311 is provided with a first through hole 3111 for accommodating the hammer 13, the first clamping assembly is used for limiting the axial displacement of the hammer 13 accommodated in the first through hole 3111 along the rotating sleeve 311, and the first clamping assembly comprises a locking member 319, a steel sleeve 323 nested in the sliding sleeve and a torsion spring 324 nested on the rotating sleeve.

The second clamping assembly comprises a collet core 312 and a collet nut 315 sleeved on the collet core 312, wherein the collet core 312 is circumferentially provided with a plurality of jaw holes for accommodating the jaws 3123 and a second through hole 3121 for the hammer 13 to pass through.

Chuck assembly 30 further includes at least one operating member for controlling the first and second clamp assemblies, the operating member being operable to control movement of clamping jaw 3123 relative to the jaw aperture between a first position and a second position. The operator includes a sliding sleeve 317 that fits over the sleeve 311 and a control sleeve that fits over the collet body 312. The sliding sleeve 317 can movably limit the movement of the hammer along the axial direction of the rotating sleeve 311, and the control sleeve can rotatably control the movement of the clamping jaw 3123 around the axial direction of the rotating sleeve 311. The control sleeve comprises a collet sleeve 314, a driving sleeve 330 fixedly connected with the collet sleeve 314, and a collet nut 315 arranged on the inner surface of the driving sleeve 330.

In this embodiment, a locking mechanism is provided between the control sleeve and the cartridge core 312, which includes the drive ring gear 3301, the control ring gear 3151, and the core ring gear 3122. The driving ring gear 3301 is disposed on the inner surface of the driving sleeve 330, the inner surface of the driving ring gear 3301 has a plurality of teeth with a shape similar to L, and a certain gap is left between adjacent L-shaped teeth. The control rim 3151 is provided on the outer surface of a control member, which is the collet nut 315, of the outer surface of the collet core 312. When the sliding sleeve 317 is in the first position, the drive ring 3301 is disengaged from the core ring 3122 and the collet sleeve 314 is allowed to rotate relative to the collet core 312, and when the sliding sleeve 317 is in the second or intermediate position, the drive ring 3301, the control ring 3151, and the core ring 3122 are simultaneously engaged and the collet sleeve is restrained from rotating relative to the collet core 312.

As shown in fig. 25, the collet nut 315 is sleeved with a first elastic member, and the first elastic member is sleeved on a groove formed on the outer surface of the boss 3152 of the collet nut 315. The clamping jaw 3123 is brought into the second position by rotating the control sleeve against the elastic force of the first elastic member. The first elastic member is a torsion spring 324, a leg 324a is disposed on the torsion spring 324, and the leg 324a is inserted into the hole 3152 of the protrusion 3151.

The control sleeve is axially fixedly connected with the sliding sleeve 317 through a connecting unit, in the embodiment, the connecting unit is provided with a retaining ring 332, the inner surface of the retaining ring 332 is provided with at least one protrusion 332a, the outer surface of the collet sleeve 314 is provided with at least one through hole 314a, the outer surface of the sliding sleeve 317 is provided with an annular groove 317a, and the protrusion 332a of the retaining ring 322 penetrates through the through hole 314a and then is clamped into the annular groove 317a, so that relative movement between the control sleeve and the sliding sleeve 317 in the circumferential direction is realized, and no relative movement in the axial direction is realized.

The collet assembly further includes a control mechanism, as shown in fig. 26, the collet core 312 includes a solid portion 312a surrounding the second through hole 3121, the solid portion 312a having an inner wall with a shortest distance from the axis of the rotating sleeve 311. The hardness of the inner wall is greater than 40HRC or 500 HV. The front ends of the chuck core body 312 and the rotating sleeve 311 are provided with a step part extending along the axial line of the rotating sleeve 311 in the radial direction, and the inner wall is a step surface 312b which is the inner surface of the step part facing the axial line of the rotating sleeve. When the clamping jaw 3123 is in the first position, the clamping jaw 3123 is closer to the rotary sleeve 311 axis relative to the step surface 312b, the control mechanism prevents the sliding sleeve 317 in the operation member from moving in the direction of the rotary sleeve 311 axis, the hammer 13 is prevented from being inserted into the first through hole 3111 through the second through hole 3121, when the clamping jaw 3123 is in the second position by rotating the clamp housing 314, the step surface 312b is closer to the rotary sleeve 311 axis relative to the clamping jaw 3123, the control mechanism allows the sliding sleeve 317 in the operation member to move along the rotary sleeve 311 axis, and the hammer 13 is allowed to be inserted into the first through hole 3111 through the second through hole 3121. In the working process, the clamping jaw cannot touch the hammer head, and friction between the clamping jaw and the hammer head is avoided.

In this embodiment, the control mechanism is disposed between the control sleeve and the chuck core 312, and includes the driving ring gear 3301 and the control ring gear 3151, when the clamping jaws 3123 are in the first position, the driving ring gear 3301 is engaged with the control ring gear 3151, the sliding sleeve is restricted from moving in the axial direction of the rotating sleeve 311, the hammer is restricted from being inserted into the second through hole 3121 and then entering the first through hole 3111, when the clamping jaws 3123 are in the second position, the driving ring gear 3301 is disengaged from the control ring gear 3151, the sliding sleeve 317 is allowed to move in the axial direction of the rotating sleeve 311, and the hammer is allowed to be inserted into the second through hole 3121 and then entering the first through hole 3111.

In this embodiment, the fixing unit and the limiting mechanism are the same as those in the first and second embodiments, and therefore, the details are not described herein.

Hereinafter, a process of mounting the hammer head to the cartridge according to the present embodiment will be described in detail with reference to fig. 27 to 34. Fig. 27, 29, 31 and 33 are sectional views of the cartridge assembly in respective states, and fig. 28, 30, 32 and 34 are schematic views corresponding to the respective state sectional views, respectively.

Fig. 27 and 28 show the teeth 3151a on the outer surface of the control ring gear 3151 engaging the L-shaped teeth 3301a on the inner surface of the drive ring gear 3301 when the slide bar 317 is in the first position. At this time, the driving sleeve 330 is restricted from moving axially, the collet sleeve 314 fixedly connected to the driving sleeve 330 is also restricted from moving axially, and the sliding sleeve 317 axially coupled to the control sleeve is also restricted from moving axially, so that the hammer 13 cannot be inserted. The collet sleeve 314 is then rotated in the direction of arrow R1 with additional force to achieve the condition of fig. 29 and 30.

As shown in fig. 29 and 30, when the jaw hole is opened to the maximum, the driving ring gear 3301 transfers the torque force to the chuck nut 315 against the spring force of the torsion spring 324, and the driving ring gear 3301 rotates a certain angle so that the teeth 3151a on the outer surface of the control ring gear 3151 move from the position of fitting with the L-shaped teeth 3301a on the driving ring gear to the gap between the adjacent L-shaped teeth 3301a and 3302a, at which time the driving sleeve 330 is allowed to move axially, and the chuck sleeve 314 fixedly connected with the driving sleeve 330 is also allowed to move axially. The collet sleeve 314 is pulled in the direction of arrow M1, and the driving sleeve 330 is moved, so that the state shown in fig. 31 and 32 can be obtained.

Referring to fig. 31 and 32, pulling the collet sleeve 314 moves the driving sleeve 330 away from the collet assembly 30, and the sliding sleeve 317 axially engaged with the collet sleeve 314 moves, so that the sliding sleeve 317 is inserted into the hammer 13 when moving to the second position. At this time, the L-shaped teeth 3302a move to mesh simultaneously with the core ring gear 3122 and the teeth 3151a on the outer surface of the control ring gear 3151. At this time, the collet sleeve 314 is released in the direction of the arrow M1 ', and the sliding sleeve 317 is also moved in the direction of the arrow M1' together with the collet sleeve 314, so that the state shown in fig. 33 and 34 can be obtained.

As shown in fig. 33 and 34, the driving gear 3301 is driven by the collet sleeve 314 to move in the direction of arrow M1', when the sliding sleeve 317 moves to the middle position, the L-shaped teeth 3301a still engage with the core gear 3122 and the teeth 3151a on the outer surface of the control gear 3151 at the same time, that is, the collet nut 315 locks the collet core 312 through the driving sleeve 330, so that even if the collet sleeve is rotated again after inserting the hammer, the hammer cannot be clamped.

Referring to fig. 35 to 41, the hand-held power tool according to the fourth embodiment of the present invention has a similar structure to that of the third embodiment, and for convenience of description, the same structure is not repeated, and different structures are described in detail below.

As shown in fig. 35 and 36, the chuck assembly 40 in the fourth embodiment includes a hammer chuck having a rotating sleeve 411 and a drill chuck coupled to the rotating sleeve 411.

In this embodiment, the hammer chuck includes a first clamping assembly and a sliding sleeve (not shown) disposed on an outer surface of the first clamping assembly, and the drill chuck includes a second clamping assembly and a chuck sleeve (not shown) disposed on an outer surface of the second clamping assembly.

In this embodiment, the rotating sleeve 411 is provided with a first through hole 4111 for accommodating the hammer 13, the first clamping assembly is used for limiting the axial movement stroke of the hammer 13 accommodated in the first through hole 4111 along the rotating sleeve 411, and the first clamping assembly includes a locking member 419, a steel sleeve 423 nested in the sliding sleeve, and a return spring (not shown) nested in the rotating sleeve 411.

The second clamping assembly includes a collet body 412 and a collet nut (not shown) sleeved on the collet body 412, the collet body 412 is provided with a plurality of jaw holes along the circumferential direction for accommodating jaws, and a second through hole (not shown) for allowing the hammer 13 to pass through.

The jaw assembly 4 further includes at least one operating member for controlling the first and second clamping assemblies, the operating member being operable to control the movement of the jaws 4123 relative to the jaw apertures between the first and second positions. The operating member includes a sliding sleeve sleeved on the rotating sleeve 411 and a control sleeve sleeved with the chuck core 412. Wherein the control sleeve comprises a collet sleeve and a collet nut (not shown in the figure) fixedly connected with the collet sleeve.

The rotating sleeve is provided with a boss 411c, the boss 411c is provided with a first accommodating hole 4124 for at least partially accommodating the locking member 419, and the locking member 419 is a cylindrical pin in the embodiment.

An intermediate member 435 is provided between the collet core 412 and the steel sleeve 423. The intermediate member 435 is provided with a profiled aperture 435d for receiving the jaw 4123, the jaw not being received in the profiled aperture 435d when the jaw 4123 is in the first position and the jaw 4123 being at least partially received in the profiled aperture 435d when the jaw 4123 is in the second position.

A second elastic member, which is a torsion spring 430, is disposed between the rotating sleeve 411 and the intermediate member 435, and the torsion spring 430 has a first spring leg 430a and a second spring leg 430 b. The steel sleeve 423 is provided with two holes 423a and 423b for passing the first spring leg 430a and the second spring leg 430b, respectively, wherein the hole 423a is an arc-shaped hole, the first spring leg 430a can slide in the hole 423a, and the diameter of the hole 423b is slightly larger than that of the second spring leg 430 b.

Two protrusions 4231 and 4232 are also arranged on the steel sleeve 423, and the two protrusions 4231 and 4232 are clamped in the gaps between the teeth on the rotating sleeve 411. An irregularly shaped profiled piece 423c projects from the steel sleeve 423 in a radial position corresponding to the locking member 419, the profiled piece 423c abutting against the locking member 419 when the slide is in the first and intermediate positions to limit the radial movement of the locking member 419 along the rotating sleeve, and the profiled piece 423c disengaging from the locking member 419 when the slide is in the second position to allow the radial movement of the locking member 419 along the rotating sleeve 411.

A wedge hole 435a is formed at a position of the intermediate member 435 corresponding to the shaped piece 423c of the steel sleeve 423 in a radial direction for passing through the shaped piece 423 c. There is also a small circular hole 435c in the intermediate member 435 of a diameter to receive only the first spring leg 430a for receiving the first spring leg 430a through the steel sleeve hole 423 a.

In this embodiment, a control mechanism is provided between the control sleeve and the swivel sleeve 411, which comprises at least one tooth provided on the circumference of the swivel sleeve 411 and a protrusion 435b provided on the inner wall of the intermediate piece 435. The teeth on the circumference of the rotating sleeve 411 are teeth 411a and teeth 411 b. When the clamping jaw 4123 is in the first position, the tooth 411a on the rotating sleeve 411 abuts against the protrusion 435b, the sliding sleeve is limited to move along the axial direction of the rotating sleeve 411, the hammer 13 is limited to be inserted into the second through hole and then enter the first through hole 4111, when the clamping jaw 4123 is in the second position, the tooth 411a is separated from the abutment with the protrusion 435b, the protrusion 435b moves into a gap between the tooth 411a and the tooth 411b, the sliding sleeve is allowed to move along the axial direction of the rotating sleeve 411, and the hammer 13 is allowed to be inserted into the second through hole and then enter the first through hole 4111.

In the present embodiment, as shown in fig. 37, the collet core 412 includes a solid portion 412a surrounding the second through hole, and the solid portion 412a is provided with an inner wall having the shortest distance from the swivel line. In this embodiment, the inner wall is the inner surface 412b of the cartridge core near one end of the hammer head. When the clamping jaws are at the first position, the clamping jaws 4123 are closer to the axis of the rotating sleeve 411 relative to the inner wall 412b, the control mechanism 422 prevents the sliding sleeve from moving along the axis of the rotating sleeve 411, and the hammer 13 is prevented from being inserted into the first through hole 4111 through the second through hole; when the collet sleeve is rotated to move the clamping jaws 4123 to the second position, the inner wall 412b is closer to the axis of the rotating sleeve 411 than the clamping jaws 4123, and the control mechanism 422 allows the sliding sleeve 417 to move along the axis of the rotating sleeve 411, so that the hammer 13 is allowed to enter the first through hole 4111 through the second through hole.

Figures 38 to 41 show a schematic view of the relationship between the projections on the intermediate member and the teeth 411a and 411b on the swivel sleeve when the jaws are moved from the first position to the second position.

Fig. 38 shows a state where the chuck assembly 40 is not attached with the hammer 13. The jaw portions extend out of the tool and do not extend into the contoured apertures 435d of the intermediate member 435. The projection 435b on the intermediate member 435 engages the teeth 411a on the sleeve. The locking member 419 is received in the first receiving hole 4124 of the sleeve 411, and its surface abuts against the shaped block 423c of the steel sleeve 423 (see fig. 35). The state of figure 39 is achieved by rotating the collet sleeve at this point so that the jaws move in the direction of arrow M2.

Fig. 39 shows a state where the holding jaw 4123 starts to be gradually retracted into the holding jaw hole. The jaws 4123 are now closer to the hub 411 axis than the inner wall 412 b. The jaw 4123 comes into contact with the profiled aperture 435 d. As the holding jaw 4123 advances further into the shaped hole 435d, the inclined surface of the holding jaw 4123 tangent to the shaped hole 435d receives the rotational force of the holding jaw 4123, and the intermediate member 435 is pushed to rotate in the direction of the arrow R2, so that the state of fig. 40 can be obtained.

As shown in fig. 40, the projection 435b of the intermediate member 435 is slowly moved from a position where it is engaged with the teeth 411a of the rotating sleeve 411 toward the circumferential gap between the two teeth 411a and 411b of the rotating sleeve 411. When the jaw 4123 is moved to the second position, the projection 435b, which the jaw 4123 acts on, on the intermediate member, is rotated through an angle such that the teeth 411a are aligned with the gaps of the teeth 411 b. At this time, the sliding sleeve is pulled along the direction of arrow M3, so that the state shown in FIG. 41 can be obtained.

As shown in fig. 41, as the sliding sleeve moves, the protrusion 435b of the intermediate member 435 enters the gap between the two teeth 411a and 411b of the rotating sleeve 411. The hammer 13 is inserted, and the locking member 419 is ejected out of the first receiving hole 4124 (not shown) of the rotating sleeve 411 by the hammer 13. The hammer 13 is further inserted, and the locking piece 419 enters the locking groove 13a of the hammer 13 again. The sliding sleeve is released again, the surface of the locking piece 419 abuts against the profile block 423c of the steel sleeve 423 again, namely, the hammer 13 is locked in the rotating sleeve 411.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims (21)

1. A chuck component comprises a hammer chuck provided with a rotary sleeve and a drill chuck matched and connected with the rotary sleeve;

the rotating sleeve is provided with a first through hole for accommodating the hammer head;

the drill chuck comprises a chuck core body and a control sleeve sleeved with the chuck core body, wherein the chuck core body is provided with a second through hole for a hammer head to pass through;

the hammer chuck further comprises a sliding sleeve sleeved on the rotating sleeve, an elastic piece abutted against the sliding sleeve, and a fixing unit arranged between the chuck core body and the sliding sleeve;

its characterized in that, the chuck subassembly still includes locking mechanical system and sets up the stop gear between rotating cover and sliding sleeve, the sliding sleeve is operativelyfollowed the rotating cover axis and is removed to the second position through the intermediate position by the primary importance, when the sliding sleeve is in the primary importance, locking mechanical system allows the control sleeve is relative the chuck core rotates, works as the tup is when first through-hole is acceptd, works as the sliding sleeve is in when the elastic component effort is followed the rotating cover axis by the second place and is removed the intermediate position, stop gear prevents the sliding sleeve further moves to the primary importance from the intermediate position, the fixed unit restriction the tup is along rotating the axial movement stroke of cover, just locking mechanical system restriction the control sleeve is relative the chuck core rotates.

2. The chuck assembly according to claim 1, wherein the fixing unit comprises at least one locking member and a first receiving hole, the first receiving hole is provided on the chuck body, the sliding sleeve limits the locking member from moving in the first receiving hole in the radial direction of the swivel sleeve when the sliding sleeve is at the first position or the intermediate position, and allows the locking member to move in the first receiving hole in the radial direction of the swivel sleeve when the sliding sleeve is at the second position.

3. The chuck assembly as claimed in claim 2, wherein the rotating sleeve is provided with a second receiving hole, and the second receiving hole is coincident with the projection of the first receiving hole in the axial direction of the rotating sleeve.

4. The chuck assembly of claim 2, wherein the locking member is a steel ball or a locking member.

5. The chuck assembly of claim 2, wherein the securing unit further includes a first stop member nested within the sleeve, the first stop member abutting the locking member when the sleeve is in the first and intermediate positions to limit radial movement of the locking member along the rotating sleeve, and the first stop member disengaging the locking member when the sleeve is in the second position to allow radial movement of the locking member along the rotating sleeve.

6. The chuck assembly of claim 5, wherein the first stop member has a first recess that is positively engaged with the locking member, the locking member being engaged with the first recess when the slide sleeve is in the first position or the intermediate position, and the locking member being disengaged from the first recess when the slide sleeve is in the second position.

7. The chuck assembly of claim 5, wherein the limiting mechanism comprises at least one limiting member and a first limiting hole, the first limiting hole is disposed on the chuck body, the sliding sleeve limits the limiting member from moving in the first limiting hole in a radial direction of the rotating sleeve when the sliding sleeve is in the first position or the intermediate position, and the sliding sleeve allows the limiting member to move in the first limiting hole in the radial direction of the rotating sleeve when the sliding sleeve is in the second position.

8. The chuck assembly as claimed in claim 7, wherein the rotating sleeve is provided with a second limiting hole, and the second limiting hole coincides with the projection of the first limiting hole in the axial direction of the rotating sleeve.

9. The chuck assembly as claimed in claim 7, wherein an angle formed by a connecting line between the center of the first position-limiting hole and the center of the first receiving hole along the rotating sleeve axis is 135 °.

10. The chuck assembly of claim 7, wherein the retaining member is a steel ball or a locking member.

11. The chuck assembly of claim 7, wherein the limiting mechanism further comprises a second stop member nested within the sleeve, the second stop member abutting the limiting member when the sleeve is in the first position or the intermediate position to limit radial movement of the limiting member along the sleeve, and the second stop member disengaging the limiting member when the sleeve is in the second position to allow radial movement of the limiting member along the sleeve.

12. The chuck assembly of claim 11, wherein the second stop member has a second recess that is configured to mate with a retaining member, the retaining member engaging the second recess when the sleeve is in the intermediate position, the retaining member disengaging the second recess when the sleeve is in the first position and the second position.

13. The chuck assembly as in claim 12, wherein a steel sleeve is nested within said slip sleeve, said first stop and said second stop being integrally disposed on said steel sleeve.

14. The chuck assembly as claimed in claim 1, wherein a jaw hole communicating with said second through hole is provided along a circumference of said chuck core, said jaw hole receives a jaw, said drill chuck includes a chuck nut fitted around an outer surface of said chuck core, and said control sleeve is operable to drive said jaw to move in a direction of a rotating sleeve axis through said chuck nut.

15. The chuck assembly of claim 14, wherein said locking mechanism includes a first gear ring disposed on an outer surface of said collet nut and a second gear ring disposed on an outer surface of said collet core, said first gear ring disengaged from said second gear ring when said sliding sleeve is in either of a first position and a second position, said control sleeve permitted to rotate relative to said collet core, said first gear ring engaged with said second gear ring when said sliding sleeve is in an intermediate position, said control sleeve restricted from rotating relative to said collet core.

16. The chuck assembly according to claim 14 wherein said locking mechanism includes a spacer ring gear disposed in said chuck core and a clutch ring gear rotatably disposed in a sliding sleeve, said spacer ring gear being disengaged from said clutch ring gear when said sliding sleeve is in a first position, said control sleeve being permitted to rotate relative to said chuck core, said spacer ring gear being engaged with said clutch ring gear when said sliding sleeve is in an intermediate position, said control sleeve being restricted from rotating relative to said chuck core.

17. The chuck assembly according to claim 14 wherein the locking mechanism includes a core gear ring disposed on the outer surface of the chuck core, a driver gear ring nested inside a control sleeve, and a control gear ring nested around an outer surface of a control member on the outer surface of the chuck core, the driver gear ring being disengaged from the core gear ring when the sliding sleeve is in the first position, the control sleeve being permitted to rotate relative to the chuck core, the driver gear ring, the control gear ring, and the core gear ring being simultaneously engaged when the sliding sleeve is in the second or intermediate position, the control sleeve being restricted from rotating relative to the chuck core.

18. The chuck assembly of claim 1, wherein the control sleeve is axially fixedly connected to the sliding sleeve by a connection unit.

19. The chuck assembly as claimed in claim 18, wherein the connecting unit is configured as a retainer ring, the inner surface of the retainer ring is provided with at least one protrusion, the outer surface of the control sleeve is provided with at least one through hole, the outer surface of the sliding sleeve is provided with an annular groove, and the protrusion is matched with the annular groove after passing through the through hole.

20. The chuck assembly of claim 1, wherein said rotating sleeve is fixedly attached to said drill chuck.

21. A hand-held machine tool comprising a housing and a motor disposed within the housing, wherein the hand-held machine tool further comprises a chuck assembly as in claims 1-20 disposed at one end of the housing, and wherein the rotating sleeve receives rotational power output from the motor.

Images