CN217669092U

CN217669092U - Hand-held electric tool

Info

Publication number: CN217669092U
Application number: CN202220958355.1U
Authority: CN
Inventors: 钱进; 庄榜锋; 陆赛华
Original assignee: Jiangsu Dongcheng Tools Technology Co Ltd
Current assignee: Jiangsu Dongcheng Tools Technology Co Ltd
Priority date: 2022-04-23
Filing date: 2022-04-23
Publication date: 2022-10-28
Anticipated expiration: 2032-04-23

Abstract

A hand-held electric tool is used for plugging a working head and comprises an output shaft and a sleeve component connected to the output shaft. The output shaft is provided with a front end portion, an accommodating portion recessed from the front end of the front end portion, and a through hole penetrating through the side wall of the front end portion and communicated with the accommodating portion, and the working head is accommodated in the accommodating portion. The sleeve assembly comprises a sleeve which is sleeved on the periphery of the front end and is axially fixed, and a locking piece which is partially accommodated in the through hole, wherein the sleeve is provided with a groove which is inwards recessed from the inner wall surface. The sleeve is rotated to switch a locking state and a releasing state, when the sleeve assembly is in the locking state, the inner wall surface of the sleeve is attached to the through hole in the front end part, and the locking piece part is positioned in the accommodating part to lock the working head; when the sleeve assembly is in a locking state, the groove of the sleeve is communicated with the through hole at the front end part, and the locking piece moves into the groove to release the working head. The sleeve assembly facilitates removal of the batch head in a manner that is easier to install.

Description

Hand-held electric tool

[ technical field ]

The utility model relates to an instrument frock technical field, in particular to hand-held type electric tool of easy dismouting of head of criticizing.

[ background Art ]

In a conventional handheld electric tool, such as an impact driver, a bit is mounted on an output shaft of the handheld electric tool, and the bit is mounted and dismounted in the prior art by compressing a cylindrical spring to move axially along the output shaft to lock a sleeve, so that a steel ball inside the output shaft moves outwards to mount and dismount the bit. For example, chinese patent No. CN103958129B discloses a hand-held power tool having an output shaft and a tool accommodating portion on the output shaft, the tool accommodating portion having a multi-edged inner accommodating portion and a multi-edged outer accommodating portion; the polygonal inner receptacle is used for connecting a batch head, which is locked in the polygonal inner receptacle by means of a locking device associated with the tool receptacle. The locking device has a locking sleeve which, for unlocking the batch head, can be moved in an axial direction facing away from the hand-held power tool from a locking position into an unlocking position against a spring force exerted by an associated spring element, and has an actuating section and a clamping section, the clamping section being acted upon by the spring element in the direction of the locking position of the locking sleeve, and the actuating section being used to effect a movement of the locking sleeve from the locking position into the unlocking position. However, the spring element is complicated to assemble and disassemble, and in practical use, the spring element may be wound together by multiple turns due to axial movement, thereby causing the locking device to be out of work. Also, the locking device requires more parts and is difficult to install.

Accordingly, there is a need for an improved hand-held power tool that overcomes the deficiencies of the prior art.

[ contents of utility model ]

To prior art's not enough, the utility model aims to provide a hand-held type electric tool with sleeve subassembly, this sleeve subassembly makes the dismouting of criticizing the head more simple and convenient.

The utility model provides a technical scheme that prior art problem adopted is: a handheld electric tool is used for being plugged with a working head and comprises a shell, a motor, an output shaft and a sleeve assembly, wherein the motor is positioned in the shell, the output shaft is driven by the motor, and the sleeve assembly is connected to the output shaft. The output shaft is provided with a front end part exposed out of the shell and an accommodating part which is inwards recessed from the front end of the front end part, the working head part is accommodated in the accommodating part, and the sleeve component has a locking state for locking the working head and a releasing state for releasing the working head. The sleeve assembly comprises a sleeve which is sleeved on the periphery of the front end part and is axially fixed, and a locking piece which is partially accommodated in the through hole, the sleeve is provided with an inner wall surface, a groove which is inwards recessed from the inner wall surface, and a guide part which is obliquely extended from the inner wall surface to the bottom wall of the groove, and the guide part is used for guiding the locking piece to enter/depart from the groove. The sleeve is rotated to switch the locking state and the releasing state, when the sleeve assembly is located in the locking state, the inner wall surface of the sleeve is attached to the through hole of the front end part, and the locking piece part is located in the accommodating part to lock the working head; when the sleeve assembly is in the release state, the groove of the sleeve is communicated with the through hole at the front end part, and the locking piece moves into the groove from the accommodating part to release the working head.

The further improvement scheme is as follows: when the sleeve assembly is switched from the locking state to the releasing state, the guide part is used for guiding the locking piece to enter the groove; when the sleeve assembly is switched from the releasing state to the locking state, the guide part is used for guiding the locking piece to be disengaged from the groove.

The further improvement scheme is as follows: the sleeve component comprises a torsion spring positioned between the front end part and the sleeve, one end of the torsion spring is fixed on the front end part, and the other end of the torsion spring is fixed on the sleeve.

The further improvement scheme is as follows: when the sleeve assembly is switched to the release state from the locking state, the sleeve is rotated until the groove of the sleeve is communicated with the through hole, and at the moment, the torsion spring is compressed and has reset torsion.

The further improvement scheme is as follows: when the sleeve assembly is in the release state, the working head can be inserted into or pulled out of the accommodating part, and under the action of the working head, the locking piece moves into the groove from the accommodating part.

The further improvement scheme is as follows: when the sleeve assembly is switched from the release state to the locking state, the sleeve rotates to reset under the action of the reset torsion of the torsion spring.

The further improvement scheme is as follows: when the sleeve is rotated and reset, the bottom wall of the groove pushes the locking piece to move along the guide part until the locking piece is separated from the groove, and at the moment, the inner wall surface of the sleeve is attached to the through hole in the front end part.

The further improvement scheme is as follows: the through hole communicates the inner wall and the outer wall of the front end portion, the inner wall of the front end portion is of a polygonal structure, and the outer wall of the front end portion is of a circular structure.

The further improvement scheme is as follows: the locking piece is the ball, the degree of depth of through-hole is less than the diameter of ball, just the diameter of ball is greater than the through-hole is located the diameter of the inner wall of front end portion.

The further improvement scheme is as follows: the locking piece is a ball pin, and the length of the ball pin is larger than the depth of the through hole.

Compared with the prior art, the utility model discloses following beneficial effect has: the output shaft is provided with a through hole which penetrates through the side wall of the front end part and is communicated with the accommodating part, the sleeve assembly comprises a sleeve which is sleeved on the periphery of the front end part and is axially fixed, and a locking piece which is partially accommodated in the through hole, and the sleeve is provided with an inner wall surface and a groove which is inwards sunken from the inner wall surface. The sleeve is rotated to switch a locking state and a releasing state, when the sleeve assembly is positioned in the locking state, the inner wall surface of the sleeve is attached to the through hole at the front end part, and at the moment, the locking piece part is positioned in the accommodating part to lock the working head; when the sleeve assembly is in a locking state, the groove of the sleeve is communicated with the through hole at the front end part, and the locking piece moves into the groove from the accommodating part to release the working head. The sleeve assembly has only circumferential rotation about the axis and no axial movement, allowing the removal of the bit with fewer parts and easier installation. And simultaneously, the utility model discloses only need realize telescopic rotatory reseing through the torsional spring between output shaft and the sleeve for the lock piece is along radially removing and reach the purpose of criticizing first dismouting.

[ description of the drawings ]

The following detailed description of the embodiments of the present invention is provided with reference to the accompanying drawings:

fig. 1 is a perspective view of a hand-held power tool according to a preferred embodiment of the present invention;

FIG. 2 is a cross-sectional view of the hand held power tool shown in FIG. 1;

FIG. 3 is a perspective view of the front end of the main body portion of the hand held power tool shown in FIG. 1;

FIG. 4 is an exploded view of the front end of the body portion shown in FIG. 3;

FIG. 5 is a cross-sectional view of the front end of the body shown in FIG. 3;

fig. 6 is a perspective view of the output shaft and sleeve assembly of the front end of the body portion shown in fig. 3.

The meaning of the reference symbols in the figures:

100. hand-held electric tool 1, housing 101, main body part 102, grip part 103, operation button 2, motor 3, transmission mechanism 4, output shaft 41, rear end part 42, front end part 421, stepped surface 43, accommodation part 44, through hole 5, sleeve assembly 51, sleeve 510, recess 52, lock piece 53, torsion spring 54, circlip 6, battery pack

[ detailed description of the invention ]

The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. Words such as "upper," "lower," "front," "rear," and the like, which indicate orientation or positional relationships, are used solely to facilitate the description of the invention and to simplify the description, and do not indicate or imply that the referenced devices/elements must have a particular orientation or be constructed and operated in a particular orientation, and therefore should not be construed as limiting the invention.

Referring to fig. 1 to 2, a hand-held electric tool 100 for inserting a working head (not shown) according to the present invention is shown. In the present embodiment, the hand-held power tool 100 is a power wrench, and includes a housing 1, a motor 2 located in the housing 1, a transmission mechanism 3 connected to the motor 2, an output shaft 4 driven by the transmission mechanism 3, and a socket assembly 5 connected to a front end of the output shaft 4, wherein the output shaft 4 is partially exposed at the front end of the housing 1. The output shaft 4 is a wrench head at least partially exposed out of the front end of the shell 1, and the motor 2 drives the output shaft 4 to drive the sleeve component 5 to operate through the transmission mechanism 3.

The housing 1 includes a main body portion 101 extending along an axial direction and a holding portion 102 connected to a lower portion of the main body portion 101, and the motor 2, the transmission assembly 3 and the output shaft 4 are all accommodated in the main body portion 101. The grip portion 102 is used for holding when a user operates the hand-held power tool, and is provided with an operation button 103, wherein the operation button 103 is operated by the user to control the start and stop of the operation of the hand-held power tool 100. The hand-held power tool 100 further includes a battery pack 6 connected to a lower end of the grip portion 102, and the battery pack 6 is used for supplying power to the hand-held power tool 100.

Referring to fig. 3 to 6, the output shaft 4 has a rear end portion 41 accommodated in the housing 1 and a front end portion 42 extending from the rear end portion 41 to the housing 1, that is, the front end portion 42 is exposed outside the housing 1 and is used for connecting a working head. The rear end portion 41 and the front end portion 42 are both substantially cylindrical and have circular radii of different sizes, so that a step surface 421 is formed between the front end portion 42 and the rear end portion 41. The output shaft 4 is further provided with an accommodating portion 43 recessed inward from the front end of the front end portion 42 and a through hole 44 penetrating through the cylindrical side wall of the front end portion 42, and the working head portion is accommodated in the accommodating portion 43. In the present embodiment, the inner wall of the front end portion 42 has a polygonal structure, and the outer wall of the front end portion 42 has a circular structure. The through hole 44 communicates with the accommodating portion 43, that is, the through hole 44 communicates between the inner wall and the outer wall of the front end portion 42.

As shown in fig. 5, the sleeve assembly 5 includes a sleeve 51 covering the outer periphery of the front end 42, a locking member 52 partially received in the through hole 44, a torsion spring 53 located between the front end 42 and the sleeve 51, and a circlip 54 retained on the output shaft 4. One end of the torsion spring 53 is fixed to the stepped surface 421 of the front end portion 42, and the other end is fixed to the rear end surface of the sleeve 51, so that the sleeve 51 can rotate relative to the output shaft 4 and can be returned by the torsion spring 53. The elastic retainer ring 54 abuts against the front end of the sleeve 51 and is clamped on the output shaft 4, so that the sleeve 51 is axially fixed relative to the output shaft 4.

The sleeve 51 is provided with an annular inner wall surface, a groove 510 recessed inward from the inner wall surface, and a guide portion (not numbered) extending obliquely from the inner wall surface toward the bottom wall of the groove 510; the guide portion serves to guide the locking member 52 into/out of the groove 510 when the sleeve 51 rotates. In this embodiment, the locking member 52 is a ball, the depth of the through hole 44 is smaller than the diameter of the ball, and the diameter of the ball is larger than the diameter of the through hole 44 on the inner wall of the front end portion 42, so that the locking member 52 cannot be separated from the through hole 44 while the locking member moves in the through hole 44. Of course, in other embodiments, the locking member 52 may be a ball pin having a length greater than the depth of the through hole 44.

The sleeve component 5 has a locking state for locking the working head and a releasing state for releasing the working head. The sleeve 51 is rotated to switch the locked state and the released state; when the sleeve assembly 5 is in a locking state, the inner wall surface of the sleeve 51 is attached to the through hole 44 of the front end part 42, and the locking piece 52 is partially positioned in the accommodating part 43 to lock the working head; when the sleeve assembly 5 is in the release state, the groove 510 of the sleeve 51 is communicated with the through hole 44 of the front end portion 42, and the locking member 52 moves from the accommodating portion 43 into the groove 510 to release the working head.

Specifically, when the sleeve assembly 5 is switched from the locking state to the releasing state, the sleeve 51 is rotated, the groove 510 of the sleeve 51 communicates with the through hole 44, and the torsion spring 53 is compressed and has a return torsion force. When the sleeve assembly 5 is in a release state, the working head can be inserted into/pulled out of the accommodating portion 43, and under the action of the working head, the locking member 52 moves from the accommodating portion 43 into the groove 510. When the sleeve assembly 5 is switched from the release state to the lock state, the sleeve 51 is rotationally reset by the reset torsion force of the torsion spring 53. When the sleeve 51 is rotated and reset, the bottom wall of the groove 510 pushes the locking member 52 to move along the guiding portion until the locking member 52 is separated from the groove 510, and at this time, the inner wall surface of the sleeve 51 is engaged with the through hole 44 of the front end portion 42.

The utility model discloses in, output shaft 4 is equipped with the through-hole 44 that runs through the lateral wall of preceding tip 42 and intercommunication portion 43, tip 42 periphery and axial fixity's sleeve 51 and part hold in the lock 52 of through-hole 44 before sleeve subassembly 5 is located including the cover, sleeve 51 is equipped with the internal face and from the inside sunken recess 510 of internal face. The sleeve 51 is rotated to switch between a locking state and a releasing state, when the sleeve assembly 5 is in the locking state, the inner wall surface of the sleeve 51 is abutted to the through hole 44 of the front end part 42, and at the moment, the locking piece 52 is partially positioned in the accommodating part 43 to lock the working head; when the sleeve assembly 5 is in the locking state, the groove 510 of the sleeve 51 is communicated with the through hole 44 of the front end part 42, and the locking member 52 moves from the accommodating part 43 into the groove 510 to release the working head. The sleeve assembly 5 has only circumferential rotation about the axis and no axial movement, allowing the attachment and detachment of the batch head in a manner that is less in parts and easier to install. And simultaneously, the utility model discloses only need realize sleeve 51's rotation through torsional spring 53 between output shaft 4 and the sleeve 51 and reset for lock 52 along radial removal and reach the purpose of criticizing first dismouting.

The present invention is not limited to the above-described embodiments. It will be readily appreciated by those skilled in the art that many alternatives to the disclosed hand-held power tool may be made without departing from the spirit and scope of the invention. The protection scope of the present invention is subject to the content of the claims.

Claims

1. A handheld electric tool is used for being plugged with a working head and comprises a shell, a motor, an output shaft and a sleeve component, wherein the motor is positioned in the shell, the output shaft is driven by the motor, the sleeve component is connected to the output shaft, the output shaft is provided with a front end part exposed out of the shell and an accommodating part which is recessed inwards from the front end of the front end part, the working head part is accommodated in the accommodating part, and the sleeve component has a locking state for locking the working head and a releasing state for releasing the working head; the method is characterized in that: the sleeve assembly comprises a sleeve which is sleeved on the periphery of the front end part and is axially fixed, and a locking piece which is partially accommodated in the through hole, the sleeve is provided with an inner wall surface, a groove which is inwards sunken from the inner wall surface, and a guide part which is obliquely extended from the inner wall surface to the bottom wall of the groove, and the guide part is used for guiding the locking piece to enter/depart from the groove; the sleeve is rotated to switch the locking state and the releasing state, when the sleeve assembly is located in the locking state, the inner wall surface of the sleeve is attached to the through hole in the front end portion, the locking piece is partially located in the accommodating portion to lock the working head, when the sleeve assembly is located in the releasing state, the groove of the sleeve is communicated with the through hole in the front end portion, and the locking piece moves into the groove from the accommodating portion to release the working head.

2. The hand-held power tool of claim 1, wherein: when the sleeve assembly is switched from the locking state to the releasing state, the guide part is used for guiding the locking piece to enter the groove; when the sleeve assembly is switched from the releasing state to the locking state, the guide part is used for guiding the locking piece to be disengaged from the groove.

3. The hand-held power tool of claim 1, wherein: the sleeve component comprises a torsion spring positioned between the front end part and the sleeve, one end of the torsion spring is fixed on the front end part, and the other end of the torsion spring is fixed on the sleeve.

4. The hand-held power tool of claim 3, wherein: when the sleeve assembly is switched to the release state from the locking state, the sleeve is rotated until the groove of the sleeve is communicated with the through hole, and at the moment, the torsion spring is compressed and has reset torsion.

5. The hand-held power tool of claim 4, wherein: when the sleeve assembly is in the release state, the working head can be inserted into or pulled out of the accommodating part, and the locking piece moves into the groove from the accommodating part under the action of the working head.

6. The hand-held power tool of claim 4, wherein: when the sleeve assembly is switched from the release state to the locking state, the sleeve rotates to reset under the action of the reset torsion of the torsion spring.

7. The hand-held power tool of claim 6, wherein: when the sleeve is rotated and reset, the bottom wall of the groove pushes the locking piece to move along the guide part until the locking piece is separated from the groove, and at the moment, the inner wall surface of the sleeve is attached to the through hole in the front end part.

8. The hand-held power tool of claim 1, wherein: the through hole is communicated with the inner wall and the outer wall of the front end part, the inner wall of the front end part is of a polygonal structure, and the outer wall of the front end part is of a circular structure.

9. The hand-held power tool of claim 1, wherein: the locking piece is the ball, the degree of depth of through-hole is less than the diameter of ball, just the diameter of ball is greater than the through-hole is located the diameter of the inner wall of front end portion.

10. The hand-held power tool of claim 1, wherein: the locking piece is a ball pin, and the length of the ball pin is larger than the depth of the through hole.