CN216819662U

CN216819662U - Clamping mechanism and winding machine

Info

Publication number: CN216819662U
Application number: CN202123233550.2U
Authority: CN
Inventors: 张益德
Original assignee: Shenzhen Gimech Technology Corp
Current assignee: Shenzhen Gimech Technology Corp
Priority date: 2021-12-20
Filing date: 2021-12-20
Publication date: 2022-06-24
Anticipated expiration: 2031-12-20

Abstract

The utility model relates to the field of stator manufacturing, and provides a clamping mechanism and a winding machine. The clamping mechanism comprises a clamping assembly and a rotary driver. The clamping assembly comprises a plurality of clamping pieces which are arranged in a circumferential array and are used for penetrating through the inner ring of the stator core, and an opening and closing driving module used for driving each clamping piece to be synchronously opened and closed so as to clamp the inner ring of the stator core; the rotating driver is used for driving the clamping assembly to drive the stator core to rotate synchronously. The clamping assembly of the clamping mechanism can be suitable for clamping stator cores with different inner ring sizes, so that the universality is better, and the application range is wider; the clamping assembly of the clamping mechanism can be used for completing the clamping operation of the stator core with high automation degree, and the driver and the clamping assembly do not need to be repeatedly disassembled and assembled as in the prior art, so that the clamping efficiency is high, and the whole efficiency of stator winding operation is favorably ensured and improved.

Description

Clamping mechanism and winding machine

Technical Field

The utility model belongs to the technical field of stator manufacturing, and particularly relates to a clamping mechanism and a winding machine.

Background

The clamping mechanism of the existing winding machine generally comprises a mounting table, a clamp which is rotatably mounted on the mounting table and used for clamping the stator core, and a rotary driver for driving the clamp to rotate. The fixture is designed and processed according to the stator core clamped by the fixture, so that the universality is poor; and, need to wait to coil the stator core clamping at anchor clamps manually, complex operation ground, install anchor clamps in mount table and rotate the driver again to clamping efficiency is lower.

SUMMERY OF THE UTILITY MODEL

The embodiment of the utility model aims to provide a clamping mechanism to solve the technical problems of poor universality and low clamping efficiency of the conventional clamping mechanism.

In order to achieve the purpose, the utility model adopts the technical scheme that: a clamping mechanism comprising:

the clamping assembly comprises a plurality of clamping pieces which are arranged in a circumferential array and are used for penetrating through an inner ring of the stator core, and an opening and closing driving module used for driving each clamping piece to be synchronously opened and closed so as to clamp the inner ring of the stator core;

and the rotating driver is used for driving the clamping assembly to drive the stator core to synchronously rotate.

In one embodiment, the inner side of each clamping piece is enclosed to form an abutting hole, and the diameter of the abutting hole is gradually reduced along a first direction;

the opening and closing driving module comprises an abutting part arranged in the abutting hole, an abutting driving structure connected with the abutting part and an elastic ring elastically sleeved on the outer side of each clamping part; the radial dimension of the pushing piece is gradually reduced along the first direction, and the periphery of the pushing piece is abutted to each clamping piece; the pushing driving structure is used for driving the pushing piece to move back and forth along the first direction; the elastic ring provides elastic force for closing the clamping pieces.

In one embodiment, an annular limiting groove is formed on the outer side of each clamping piece, and the limiting groove is used for accommodating the elastic ring and limiting the elastic ring to move axially relative to each clamping piece.

In one embodiment, the pushing member has a plurality of sliding grooves formed on the periphery thereof for sliding engagement with the clamping members.

the opening and closing driving module comprises a pushing piece arranged in the pushing hole and a pushing driving structure connected with the pushing piece; the radial dimension of the pushing piece is gradually reduced along the first direction, a plurality of sliding connection grooves which are respectively in sliding connection fit with the clamping pieces are formed in the periphery of the pushing piece, and the sliding connection grooves can limit the clamping pieces to be separated from the notches of the clamping pieces; the pushing driving structure is used for driving the pushing piece to move back and forth along the first direction.

In one embodiment, the taper angle of the pushing member is equal to the taper angle of the pushing hole and is less than or equal to 10 °.

In one embodiment, the clamping assembly further comprises a clamping main shaft connected with the rotary driver, the clamping main shaft is provided with a cylindrical clamping part, and the periphery of the clamping part is provided with a plurality of clamping grooves arranged in a circumferential array;

the clamping piece comprises a clamping piece which is arranged in an arc shape and is arranged on the outer side of the clamping part, and a clamping seat which is connected with the inner side of the clamping piece and penetrates through the clamping groove.

In one embodiment, the clamping main shaft is provided with a supporting part arranged at the bottom side of the clamping part, a slideway formed by extending along the first direction and a communication hole for communicating the slideway and the pushing hole are arranged in the supporting part;

the bottom end of the pushing piece is connected with a linkage rod penetrating through the communicating hole, and one end of the linkage rod, far away from the pushing piece, is provided with a head part;

the pushing driving structure comprises a sliding block arranged in the slide way, a sliding driver used for driving the sliding block to slide along the slide way, and an elastic piece elastically abutted between the head of the linkage rod and the top wall of the slide way, wherein the elastic piece provides elastic force for enabling the head of the linkage rod to abut against the sliding block.

In one embodiment, the outer side of at least one clamping piece is provided with an alignment key, and the alignment key is used for being in limit fit with an alignment groove on an inner ring of the stator core.

The embodiment of the utility model also aims to provide a winding machine which comprises the clamping mechanism.

The utility model has the following beneficial effects:

according to the clamping mechanism provided by the embodiment of the utility model, when the stator core to be wound is sleeved on the outer side of the clamping assembly, the clamping pieces can be driven to synchronously open and close through the opening and closing driving module, so that the inner ring of the stator core is adaptively tensioned outwards and clamped, and then the clamping assembly and the stator core clamped by the clamping assembly can be driven to synchronously rotate through the rotating driver, so that the stator winding operation can be conveniently completed by matching with other mechanisms of a winding machine. The clamping assembly can be suitable for clamping stator cores with different inner ring sizes, namely different specifications, so that the universality is better and the application range is wider; the clamping assembly can finish the clamping operation of the stator core with higher automation degree, so that the clamping efficiency is higher, and the whole efficiency of stator winding operation is favorably ensured and improved; the connection relation between the rotary driver and the clamping assembly is not broken in the period that the clamping assembly repeatedly clamps the stator core, so that the rotary driver and the clamping assembly do not need to be repeatedly disassembled and assembled as in the prior art, and the whole efficiency of the clamping efficiency and the stator winding operation is further improved.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required to be used in the embodiments or the prior art description will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings may be obtained according to these drawings without inventive labor.

Fig. 1 is a schematic perspective view of a stator core provided in the prior art;

fig. 2 is a schematic perspective view of a clamping mechanism according to an embodiment of the present invention;

FIG. 3 is a cross-sectional view taken along A-A as provided in FIG. 2;

FIG. 4 is a schematic perspective view of a clamping assembly according to an embodiment of the present invention;

figure 5 is an exploded view of the clamping assembly provided in figure 4.

Wherein, in the figures, the respective reference numerals:

100 ' -stator core, 110 ' -annular yoke, 120 ' -tooth, 101 ' -inner ring, 102 ' -alignment groove;

100-clamping component, 110-clamping component, 111-pushing hole, 112-limiting groove, 113-clamping component and 114-clamping seat; 120-opening and closing drive module, 121-pushing piece, 1211-sliding groove; 122-push driving structure, 1221-slide block, 1222-elastic element; 123-linkage rod, 1231-head; 130-clamping main shaft, 131-clamping part, 1311-clamping groove, 132-supporting part, 1321-slideway, 1322-communicating hole and 1323-shaft shoulder; 140-para-key;

200-rotation driver.

Detailed Description

In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the utility model and are not intended to limit the utility model.

In the description of the present invention, it is to be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships illustrated in the drawings, and are used merely for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

The following describes specific implementations of the present invention in more detail with reference to specific embodiments:

it should be noted that the motor includes a stator and a rotor (not shown in the drawings), where the stator is a stationary part of the motor and mainly functions to generate a rotating magnetic field, and the rotor is a rotatable part of the motor and mainly functions to be cut by magnetic lines of force in the rotating magnetic field to generate a current.

Referring to fig. 1, the stator includes a stator core 100' and a plurality of coil windings (not shown). Stator core 100 ' includes an annular yoke portion 110 ' and a plurality of teeth portions 120 ' connected to an inner side or an outer side of annular yoke portion 110 ' and arranged at intervals in a circumferential direction of annular yoke portion 110 '. The winding operation performed on each tooth 120' to form the coil winding is the stator winding operation as will be fully described.

Wherein, when the plurality of teeth 120 ' are connected to the inside of the annular yoke 110 ', the insides of the plurality of teeth 120 ' collectively enclose an inner ring 101 ' of a stator core 100 ', which will be referred to hereinafter; when the plurality of teeth 120 ' are connected to the outside of the ring yoke 110 ', the inner ring of the ring yoke 110 ' forms an inner ring 101 ' of the stator core 100 ' mentioned below.

Example one

Referring to fig. 2 and 3, an embodiment of the utility model provides a clamping mechanism, which includes a clamping assembly 100 and a rotation driver 200. The clamping assembly 100 comprises a plurality of clamping pieces 110 which are arranged in a circumferential array and are used for penetrating through an inner ring 101 'of the stator core 100', and an opening and closing driving module 120 which is used for driving each clamping piece 110 to be synchronously opened and closed so as to clamp the inner ring 101 'of the stator core 100'; the rotating driver 200 is used for driving the clamping assembly 100 to drive the stator core 100' to rotate synchronously.

When the stator core 100 'to be wound is sleeved outside the clamping assembly 100, the clamping assembly 110 can be driven to synchronously open and close by the opening and closing driving module 120, so that the inner ring 101' of the stator core 100 'is adaptively tensioned outwards and clamped, and then the clamping assembly 100 and the clamped stator core 100' can be driven to synchronously rotate by the rotating driver 200, so that stator winding operation can be completed by matching with other mechanisms of a winding machine. The clamping assembly 100 can be used for clamping stator cores 100' with different inner ring sizes, namely different specifications, so that the universality is better and the application range is wider; the clamping assembly 100 can automatically complete the clamping operation of the stator core 100' to a higher degree, so that the clamping efficiency is higher, and the overall efficiency of stator winding operation is favorably ensured and improved; the connection relation between the rotary driver 200 and the clamping assembly 100 is not broken during the period that the clamping assembly 100 repeatedly clamps the stator core 100', so that the rotary driver 200 and the clamping assembly 100 do not need to be repeatedly disassembled and assembled as in the prior art, and the whole efficiency of the clamping efficiency and the stator winding operation is further improved.

In addition, the clamping mechanism further comprises a lifting driver (not shown in the figure) for driving the clamping assembly 100 and the rotating driver 200 to lift synchronously. On the basis, on one hand, on the basis of not influencing the rotating effect of the rotating driver 200 on the clamping component 100 and the stator core 100 'clamped by the clamping component, the rotating driver 200, the clamping component 100 and the stator core 100' clamped by the clamping component are driven by the lifting driver to lift as required so as to more flexibly match with other mechanisms of the winding machine to complete stator winding operation, so that the use performance of the clamping mechanism can be ensured and improved to a certain extent, and the overall efficiency and the accuracy of the stator winding operation are ensured and improved. On the other hand, the stator core 100 'to be wound can be transferred to the position aligned with the clamping mechanism up and down by means of manpower, a manipulator or a conveying mechanism, and the clamping assembly 100 and the rotating driver 200 are driven by the lifting driver to ascend synchronously, so that the clamping assembly 100 penetrates through the inner ring 101' of the stator core 100 ', and the clamping of the stator core 100' can be realized more quickly, more conveniently and more reliably.

Referring to fig. 3, 4 and 5, in the present embodiment, the inner side of each clamping member 110 is enclosed to form a cone-like pushing hole 111, and the aperture of the pushing hole 111 is tapered along a first direction a; the opening/closing driving module 120 includes a pushing member 121 disposed in the pushing hole 111 and having a cone-like shape, a pushing driving structure 122 connected to the pushing member 121, and an elastic ring (not shown) elastically sleeved on an outer side of each clamping member 110; wherein, the radial dimension of the pushing member 121 is gradually reduced along the first direction a, and the periphery of the pushing member 121 abuts against each clamping member 110; the pushing driving structure 122 is used for driving the pushing member 121 to move back and forth along the first direction a; the elastic ring provides an elastic force for closing the clamping members 110.

Wherein the first direction a is a vertically downward direction or a vertically upward direction.

Wherein, a plurality of elastic rings can be arranged along the axial direction of each clamping piece 110 to strengthen, optimize and equalize the elastic force applied to each clamping piece 110 by each elastic ring.

By adopting the above scheme, when the pushing driving structure 122 drives the pushing member 121 to move along the first direction a, the end of the pushing member 121 with the larger radial dimension can gradually approach the end of the pushing hole 111 with the smaller aperture, and gradually overcome the elastic force of the elastic ring to push outwards each clamping member 110, so that each clamping member 110 is expanded outwards; on the contrary, when the pushing driving structure 122 drives the pushing member 121 to move along the direction opposite to the first direction a, the end of the pushing member 121 with the larger radial dimension may gradually approach the end of the pushing hole 111 with the larger aperture, and meanwhile, the elastic force of the elastic ring may urge each clamping member 110 to keep abutting against the outer periphery of the pushing member 121, so that each clamping member 110 is folded. Therefore, the clamping assembly 100 can stably, reliably and highly automatically clamp the stator core 100 ', and after the stator core 100 ' is clamped, the clamping assembly 100 can ensure and improve the clamping effect of the stator core 100 ' based on the abutting relation between the abutting piece 121 and each clamping piece 110.

Referring to fig. 4 and 5, in the present embodiment, an annular limiting groove 112 is disposed on an outer side of each clamping member 110, and the limiting groove 112 is used for receiving an elastic ring and limiting the elastic ring from moving axially relative to each clamping member 110. Wherein the axial direction refers to the axial direction of each clip member 110.

By adopting the above scheme, the elastic ring accommodated in the limiting groove 112 can be limited to move along the axial direction of each clamping piece 110 in the opening and closing process of each clamping piece 110 through the limiting groove, so that the position of the elastic ring can be stabilized, the elastic force for contraction can be continuously, stably and reliably applied to each clamping piece 110, and the risk that the elastic ring is accidentally separated from each clamping piece 110 can be effectively reduced.

Referring to fig. 4 and 5, in the present embodiment, the pushing member 121 is provided with a plurality of sliding grooves 1211 on the periphery thereof for sliding engagement with the clamping members 110. The number of the sliding grooves 1211 corresponds to the number of the clip members 110.

By adopting the above scheme, the sliding relation between the sliding groove 1211 and the clamping member 110 can restrict and guide the relative sliding direction between the abutting member 121 and the clamping member 110, and restrict the relative rotation between the abutting member 121 and the clamping member 110, so that the abutting member 121 can more stably, reliably and accurately drive each clamping member 110 to synchronously open and close.

Referring to fig. 3, in the present embodiment, the taper angle β of the pushing member 121 is equal to the taper angle of the pushing hole 111 and is less than or equal to 10 °.

By adopting the above scheme, the taper angle β of the abutting member 121 can be reduced to expand the horizontal component of the normal pressure of the abutting member 121 on each clamping member 110, that is, the abutting force of the abutting member 121 on each clamping member 110 is expanded, so that the clamping force of the clamping assembly 100 on the stator core 100 'is favorably expanded, and the clamping effect of the clamping assembly 100 on the stator core 100' is ensured and improved.

Referring to fig. 3, 4 and 5, in the present embodiment, the clamping assembly 100 further includes a clamping main shaft 130 connected to the rotary driver 200, the clamping main shaft 130 has a cylindrical clamping portion 131, and a plurality of clamping grooves 1311 arranged in a circumferential array are disposed on an outer periphery of the clamping portion 131; the clamping member 110 includes a clamping piece 113 disposed in an arc shape and disposed outside the clamping portion 131, and a clamping seat 114 connected to an inner side of the clamping piece 113 and penetrating the clamping groove 1311. The number of the clamping grooves 1311 corresponds to the number of the clamping seats 114.

By adopting the above scheme, each clamping piece 110 and the opening and closing driving module 120 can be installed on the clamping main shaft 130, so that the required position relation and connection relation between each clamping piece 110 and the opening and closing driving module 120 can be conveniently established, and the clamping main shaft 130 can support and protect each clamping piece 110 and the opening and closing driving module 120 installed on the clamping main shaft. And the rotation driver 200 is also convenient to drive the clamping main shaft 130 to rotate by being connected with the clamping main shaft, so as to drive the clamping assembly 100 to rotate integrally. Thereby being beneficial to the integral structure of the regularization and modularization clamping mechanism.

By adopting the above scheme, when the opening and closing driving module 120 drives each clamping piece 110 to open, the reciprocating direction of the clamping seat 114, namely the clamping piece 110, can be restricted and guided by the clamping groove 1311, so that each clamping piece 110 can be more conveniently and stably opened and closed relative to the clamping part 131.

By adopting the above scheme, each clamping piece 110 can form large-area butt and clamping on the inner ring 101 ' of the stator core 100 ' through the arc-shaped clamping piece 113, thereby being beneficial to ensuring and improving the clamping effect of the clamping assembly 100 on the stator core 100 '.

Referring to fig. 3, 4 and 5, in the present embodiment, the clamping spindle 130 has a supporting portion 132 disposed at the bottom side of the clamping portion 131, and a slide 1321 formed by extending along the first direction a and a communication hole 1322 communicating the slide 1321 with the pushing hole 111 are disposed in the supporting portion 132; the bottom end of the pushing member 121 is connected with a linkage rod 123 penetrating through the communication hole 1322, and a head 1231 is arranged at one end of the linkage rod 123 far away from the pushing member 121; the pushing driving structure 122 includes a sliding block 1221 disposed in the sliding way 1321, a sliding driver (not shown in the drawings) for driving the sliding block 1221 to slide along the sliding way 1321, and an elastic member 1222 elastically abutted between the head 1231 of the linkage 123 and the top wall of the sliding way 1321, wherein the elastic member 1222 provides an elastic force for abutting the head 1231 of the linkage 123 against the sliding block 1221.

The slide 1321 can guide the slider 1221 and the moving direction of the head 1231 of the linkage 123.

By adopting the above scheme, the abutting driving structure 122 can drive the sliding block 1221 to slide to the preset position in the sliding way 1321 along the first direction a or the direction opposite to the first direction a through the sliding driver, and elastically abut against the head 1231 of the linkage rod 123 through the elastic piece 1222 to keep the head 1231 of the linkage rod 123 abutting against the sliding block 1221, so as to reliably and smoothly drive the abutting piece 121 interlocked with the linkage rod 123 to move to the required position along the first direction a or the direction opposite to the first direction a, during which, the abutting limiting effect of the sliding block 1221 on the head 1231 of the linkage rod 123 and the elastic abutting effect of the elastic piece 1222 on the head 1231 of the linkage rod 123 can jointly ensure that the linkage rod 123 and the abutting piece 121 can be stabilized at a certain position, and further can promote each clamping piece 110 to keep a proper opening and closing degree to stably and reliably clamp the stator core 100'.

In addition, the outer side of the supporting portion 132 is provided with a shoulder 1323, and the shoulder 1323 can be used to directly support the stator core 100 ', or indirectly support the stator core 100 ' by means of a sleeve (not shown in the figure) sleeved on a portion, between the shoulder 1323 and the clamping member 110, of the supporting portion 132, so that the clamping mechanism can be adapted to clamp the stator cores 100 ' with different thicknesses/heights, and the clamping mechanism is better in universality and wider in application range.

Referring to fig. 3, fig. 4, and fig. 5, referring to fig. 1, in the present embodiment, an alignment key 140 is disposed on an outer side of at least one clamping member 110, and the alignment key 140 is used for being in limit fit with an alignment slot 102 ' on an inner ring 101 ' of a stator core 100 '.

By adopting the above scheme, the positioning key 140 is in limit fit with the positioning groove 102 ' on the inner ring 101 ' of the stator core 100 ', so that the clamping component 100 is aligned and the stator core 100 ' is positioned and clamped, and particularly, the relative rotation between the clamping component 100 and the stator core 100 ' can be limited, thereby being beneficial to ensuring and improving the clamping effect of the clamping component 100 on the stator core 100 ', and being beneficial to ensuring and improving the operation precision of the clamping mechanism for driving the stator core 100 ' to rotate in the stator winding operation process.

Referring to fig. 1, fig. 2, and fig. 3, an embodiment of the present invention further provides a winding machine, including a clamping mechanism. Further, the winding machine may further include a wire feeding mechanism (not shown in the drawings) or the like for feeding and winding the wire around the teeth portion 120' to form a coil winding.

Example two

The difference between this embodiment and the first embodiment is:

referring to fig. 3, 4 and 5, in the present embodiment, the inner sides of the clamping members 110 are enclosed to form pushing holes 111, and the diameters of the pushing holes 111 are tapered along a first direction a; the opening and closing driving module 120 includes a pushing member 121 disposed in the pushing hole 111, and a pushing driving structure 122 connected to the pushing member 121; the radial dimension of the pushing member 121 is gradually reduced along the first direction a, the outer periphery of the pushing member 121 is provided with a plurality of sliding grooves 1211 which are respectively in sliding fit with the clamping members 110, and the sliding grooves 1211 can limit the clamping members 110 from being separated from the notches of the sliding grooves 1211; the pushing driving structure 122 is used for driving the pushing member 121 to move back and forth along the first direction a. The number of the sliding grooves 1211 corresponds to the number of the clip members 110.

The cross-sectional shape of the sliding contact groove 1211 perpendicular to the extending direction thereof may be designed to restrict the clip 110 fitted to the sliding contact groove 1211 from being disengaged from the notch of the sliding contact groove 1211. For example, the slip joint groove 1211 may be designed as a dovetail groove. Of course, in other possible embodiments, the pushing element 121 may be a magnetic element to generate a magnetic attraction force on each of the clamps 110, so as to limit the clamps 110 to be released from the notches of the sliding grooves 1211 based on the magnetic attraction force. The present embodiment does not limit this.

By adopting the above scheme, when the pushing driving structure 122 drives the pushing member 121 to move along the first direction a, the end of the pushing member 121 with the larger radial dimension can gradually approach the end of the pushing hole 111 with the smaller aperture, and drive each clamping member 110 in sliding connection and matching therewith to expand; on the contrary, when the pushing driving structure 122 drives the pushing member 121 to move along the direction opposite to the first direction a, the end of the pushing member 121 with the larger radial dimension may gradually approach the end of the pushing hole 111 with the larger aperture, and drive the clamping members 110 in sliding fit therewith to close. Therefore, the clamping assembly 100 can stably, reliably and highly automatically clamp the stator core 100 ', and after the stator core 100 ' is clamped, the clamping effect of the clamping assembly 100 on the stator core 100 ' is ensured and improved based on the abutting relation and the sliding relation between the abutting piece 121 and each clamping piece 110.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the utility model, and any modifications, equivalents or improvements made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims

1. A clamping mechanism is characterized by comprising:

2. The clamping mechanism according to claim 1, wherein the inner side of each clamping piece is enclosed to form an abutting hole, and the diameter of the abutting hole is gradually reduced along a first direction;

3. The clamping mechanism according to claim 2, wherein an annular limiting groove is formed in an outer side of each clamping member, and is used for receiving the elastic ring and limiting the elastic ring to move axially relative to each clamping member.

4. The clamping mechanism according to claim 2, wherein the pushing member has a plurality of sliding grooves formed on an outer periphery thereof for slidably engaging with the clamping members.

5. The clamping mechanism according to claim 1, wherein the inner side of each clamping piece is enclosed to form an abutting hole, and the diameter of the abutting hole is gradually reduced along a first direction;

6. The chuck as claimed in any one of claims 2 to 5, wherein the taper angle of the urging member is equal to the taper angle of the urging hole and is less than or equal to 10 °.

7. The clamping mechanism according to any one of claims 2 to 5, wherein the clamping assembly further comprises a clamping main shaft connected with the rotary driver, the clamping main shaft is provided with a cylindrical clamping part, and the periphery of the clamping part is provided with a plurality of clamping grooves arranged in a circumferential array;

8. The clamping mechanism according to claim 7, wherein the clamping spindle has a support portion provided at a bottom side of the clamping portion, and a slide way extending in the first direction and a communication hole communicating the slide way and the pushing hole are provided in the support portion;

9. The clamping mechanism according to any one of claims 1 to 5, wherein an alignment key is arranged on the outer side of at least one clamping piece, and the alignment key is used for being in limit fit with an alignment groove on an inner ring of the stator core.

10. A winding machine, characterized by comprising a clamping mechanism according to any one of claims 1-9.