CN220770000U - Self-locking mechanism and mill - Google Patents

Abstract

The embodiment of the utility model relates to the technical field of self-locking mechanisms, in particular to a self-locking mechanism and a grinding machine, wherein the self-locking mechanism comprises a first shaft seat, a locking ring, a second shaft seat and a rotating column, the first shaft seat comprises a first seat body, a first annular wall and a second annular wall, the first annular wall and the second annular wall are arranged on the first seat body at intervals, a containing cavity is enclosed by the first annular wall, the second annular wall and the first seat body together, the locking ring is sleeved on the outer wall of the first shaft seat and is used for being fixed with external equipment, the second shaft seat is rotatably arranged in the containing cavity, and a limiting space is enclosed by the second shaft seat, the first annular wall, the second annular wall and the locking ring together; the rotating column is movably accommodated in the limiting space; when the first shaft seat is driven, one of the first annular wall and the second annular wall synchronously pushes the second shaft seat and the rotating column to rotate relative to the locking ring; when the second shaft seat is driven, the rotary column clamps the second shaft seat and the locking ring. Through the mode, the self-locking function of the self-locking mechanism can be realized, and the service life is prolonged.

Description

Self-locking mechanism and mill

Technical Field

The embodiment of the utility model relates to the technical field of self-locking mechanisms, in particular to a self-locking mechanism and a grinding machine.

Background

The self-locking mechanism is a mechanism with a forward stroke and a reverse stroke or a movement mode, when the self-locking mechanism operates in the forward stroke, the driving force can enable the self-locking mechanism to move, and when the self-locking mechanism operates in the reverse stroke, the driving force cannot drive the self-locking mechanism to move whatever the driving force is. The self-locking mechanism can be applied to the fields of industrial machinery, medical equipment, household equipment and the like, and has wider application prospect.

In carrying out the utility model, the inventors found that: the traditional self-locking mechanism with the connecting shaft function adopts a gear structure, reverse travel of the self-locking mechanism is restrained by reverse engagement of gears, abrasion can be accelerated by high-frequency reverse travel, and the gears are damaged due to overlarge reverse travel driving force.

Disclosure of Invention

The embodiment of the utility model mainly solves the technical problem of providing the self-locking mechanism which can realize the self-locking function, has longer service life and increases user experience.

In order to solve the technical problems, the utility model adopts a technical scheme that: the self-locking mechanism comprises a first shaft seat, a locking ring, a second shaft seat and a rotating column, wherein the first shaft seat comprises a first seat body, a first annular wall and a second annular wall, the first annular wall and the second annular wall are arranged on the first seat body at intervals, and an accommodating cavity is enclosed by the first annular wall, the second annular wall and the first seat body together; the locking ring is sleeved on the outer wall of the first shaft seat and is used for being fixed with external equipment; the second shaft seat is rotationally arranged in the accommodating cavity, and a limiting space is enclosed by the second shaft seat, the first annular wall, the second annular wall and the locking ring together; the rotating column is movably accommodated in the limiting space; when the first shaft seat is driven, one of the first annular wall and the second annular wall synchronously pushes the second shaft seat and the rotating column to rotate relative to the locking ring; when the second shaft seat is driven, the rotary column clamps the second shaft seat and the locking ring, and the second shaft seat is not allowed to rotate relative to the locking ring.

Optionally, the side wall of the second shaft seat is provided with a first protruding part and an abutting plane, the surface of the first annular wall facing the accommodating cavity is provided with a first limit groove, the first protruding part is accommodated in the first limit groove, the first protruding part can move in the first limit groove, and a limit space is enclosed by the abutting plane, the first annular wall, the second annular wall and the locking ring together; when the first shaft seat is driven, one of the first annular wall and the second annular wall pushes the rotating column to rotate relative to the locking ring, and the side wall of the first limiting groove abuts against the first protruding part to push the second shaft seat to rotate; when the second shaft seat is driven, the rotary column is clamped with the abutting plane and the locking ring, and the second shaft seat is not allowed to rotate relative to the locking ring.

Optionally, the rotary column comprises a first rotary column and a second rotary column, and the abutting plane comprises a first abutting plane and a second abutting plane; the limiting space comprises a first limiting space and a second limiting space, the first limiting space is formed by the first abutting plane, one end of the first annular wall, one end of the second annular wall and the locking ring in a surrounding mode, and the second limiting space is formed by the second abutting plane, the other end of the first annular wall, the other end of the second annular wall and the locking ring in a surrounding mode; the first rotating column is located in a first limiting space, and the second rotating column is located in a second limiting space.

Optionally, a second protruding portion is provided on a side wall of the second shaft seat, a second limiting groove is provided on a surface of the second annular wall facing the accommodating cavity, the second protruding portion is accommodated in the second limiting groove, and the second protruding portion can move in the second limiting groove; when the first rotating shaft is driven, the first rotating shaft drives the first shaft seat to rotate, one of the first annular wall and the second annular wall pushes the rotating column to rotate relative to the locking ring, and the side wall of the second limiting groove abuts against the second protruding portion to push the second shaft seat to rotate.

Optionally, a third limiting groove is formed in one side wall of the second shaft seat, a third protruding portion is arranged on the surface, facing the accommodating cavity, of the first annular wall, the third protruding portion is accommodated in the third limiting groove, and the third protruding portion can move in the third limiting groove; when the first shaft seat is driven, one of the first annular wall and the second annular wall pushes the rotating column to rotate relative to the locking ring, and the side wall of the third protruding portion abuts against the third limiting groove to push the second shaft seat to rotate.

Optionally, a fourth limiting groove is formed in the other side wall of the second shaft seat, a fourth protruding portion is arranged on the surface, facing the accommodating cavity, of the second annular wall, the fourth protruding portion is accommodated in the fourth limiting groove, and the fourth protruding portion can move in the fourth limiting groove; when the first shaft seat is driven, one of the first annular wall and the second annular wall pushes the rotating column to rotate relative to the locking ring, and the side wall of the fourth protruding portion abuts against the fourth limiting groove to push the second shaft seat to rotate.

Optionally, the outer ring of the locking ring is provided with a clamping table, and the clamping table is used for being fixed with external equipment.

Optionally, the central axes of symmetry of the first shaft seat, the second shaft seat and the locking ring are collinear, and the central axis of the rotating column is parallel to the central axis of symmetry of the locking ring.

Optionally, the first shaft seat is provided with a first mounting hole, the first mounting hole is used for mounting a rotating shaft of the driving piece, the second shaft seat is provided with a second mounting hole, the second mounting hole is used for mounting a part to be rotated, and the symmetrical central axes of the first mounting hole and the second mounting hole are collinear with the symmetrical central axis of the locking ring.

In order to solve the technical problems, another technical scheme adopted in the embodiment of the application is as follows: the utility model provides a mill includes casing, actuating mechanism, output mechanism and foretell self-locking mechanism, actuating mechanism is provided with first pivot, actuating mechanism install in the casing, self-locking mechanism's lock ring is fixed in the casing, first pivot is connected in self-locking mechanism's first axle bed, output mechanism connects in the second axle bed, output mechanism is provided with the second pivot, the second pivot is used for connecting the functional accessory.

The embodiment of the utility model has the beneficial effects that: different from the situation of the prior art, the self-locking mechanism comprises a first shaft seat, a locking ring, a second shaft seat and a rotating column, wherein the first shaft seat comprises a first seat body, a first annular wall and a second annular wall, the first annular wall and the second annular wall are arranged on the first seat body at intervals, and an accommodating cavity is formed by the first annular wall, the second annular wall and the first seat body in a surrounding mode; the locking ring is sleeved on the outer wall of the first shaft seat and is used for being fixed with external equipment; the second shaft seat is rotationally arranged in the accommodating cavity, and a limiting space is enclosed by the second shaft seat, the first annular wall, the second annular wall and the locking ring together; the rotating column is movably accommodated in the limiting space; when the first shaft seat is driven, one of the first annular wall and the second annular wall synchronously pushes the second shaft seat and the rotating column to rotate relative to the locking ring; when the second shaft seat is driven, the rotary column clamps the second shaft seat and the locking ring, and the second shaft seat is not allowed to rotate relative to the locking ring. Through the mode, the self-locking function can be realized, the service life is longer, and the use experience of a user is improved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments of the present application will be briefly described below, and it is obvious that the drawings described below are only some embodiments of the present application, and that other drawings may be obtained according to the drawings without inventive effort for a person skilled in the art.

FIG. 1 is an exploded view of one embodiment of a self-locking mechanism of the present utility model;

FIG. 2 is a schematic front view of an embodiment of the self-locking mechanism of the present utility model;

FIG. 3 is another schematic front view of an embodiment of the self-locking mechanism of the present utility model;

fig. 4 is an exploded view of an embodiment mill of the utility model.

Reference numerals illustrate: 1. a driving mechanism; 2. a self-locking mechanism; 3. an output mechanism;

11. a first rotating shaft; 12. a rotating module;

21. a first shaft seat; 22. a second axle seat; 23. a rotating column; 24. a locking ring; 25. a limit space;

210. a first base; 211. a first annular wall; 212. a second annular wall; 213. a first mounting hole; 214. a housing chamber; 2110. a first limit groove; 2120. the second limit groove; 2130. a third boss; 2140. a fourth protruding portion;

220. a second seat body; 223. a first boss; 224. a second protruding portion; 225. abutting against the plane; 226. a second mounting hole; 227. an extension seat; 2251. a first abutment plane; 2252. a second abutment plane; 2230. a third limit groove; 2240. a fourth limit groove;

231. a first swivel post; 232. a second swivel post;

241. a mounting cavity; 242. a clamping table;

251. the first limiting space; 252. the second limiting space;

31. a second rotating shaft; 32. a bearing; 33. a fitting mounting base;

Detailed Description

In order that the utility model may be readily understood, a more particular description thereof will be rendered by reference to specific embodiments that are illustrated in the appended drawings. It will be understood that when an element is referred to as being "fixed" to another element, it can be directly on the other element or one or more intervening elements may be present therebetween. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or one or more intervening elements may be present therebetween. The terms "vertical," "horizontal," "left," "right," and the like are used herein for illustrative purposes only.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs. The terminology used in the description of the utility model herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. The term "and/or" as used in this specification includes any and all combinations of one or more of the associated listed items.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated; thus, a feature defining "a first", "a second" may include one or more such features, either explicitly or implicitly; the meaning of "plurality" is two or more. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art as the case may be.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the present application. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of skill in the art will explicitly and implicitly appreciate that the embodiments described herein may be combined with other embodiments.

Referring to fig. 1 to 3, the self-locking mechanism 2 includes a first shaft seat 21, a second shaft seat 22, a locking ring 24 and a rotating post 23, the locking ring 24 is used for being fixed with an external device, the locking ring 24 is provided with a mounting cavity 241, the first shaft seat 21 is disposed in the mounting cavity 241, that is, the locking ring 24 is sleeved on the outer wall of the first shaft seat 21, the second shaft seat 22 is rotatably embedded in the first shaft seat 21, the rotating post 23 is disposed in a limit space 25 formed by the first shaft seat 21 and the second shaft seat 22, the first shaft seat 21 and the second shaft seat 22 can rotate relative to the locking ring 24, the rotating post 23 can move or rotate relative to the inner wall of the locking ring 24, and the first shaft seat 21 can push the second shaft seat 22 and the rotating post 23 to rotate.

The self-locking mechanism 2 realizes the principle of self-locking as follows: when the first shaft seat 21 is driven, the first annular wall 211 or the second annular wall 212 of the first shaft seat 21 pushes the second shaft seat 22 and the rotating post 23 to rotate relative to the locking ring 24, and the thrust direction of the rotating post 23 is tangential to the outer edge of the first shaft seat 21, so that the rotating post 23 can perform a circular motion relative to the locking ring 24. When the second shaft seat 22 is driven, the second shaft seat 22 will rotate a small amount to tightly press the rotating column 23, and the thrust direction of the rotating column 23 is approximately the radial direction of the second shaft seat 22, so that the second shaft seat 22, the rotating column 23 and the locking ring 24 are tightly pressed, and no rotation can be generated, thereby achieving the purpose of self-locking.

For the above-mentioned locking ring 24, please continue to refer to fig. 1, the locking ring 24 has a circular ring structure with a certain length along the central axis direction of the locking ring 24. It can be understood that the first shaft seat 21 and the inner ring of the locking ring 24 are in surface contact, but after the actual installation, a certain gap is formed between the first shaft seat 21 and the inner ring of the locking ring 24, that is, the locking ring 24 is fixed on an external device, the first shaft seat 21 is connected with the rotating shaft of the driving piece, and the first shaft seat 21 and the locking ring 24 are not in direct contact, so that friction force is reduced, and abrasion of the self-locking mechanism 2 is reduced. The rotary column 23 and the locking ring 24 are in line contact, the rotary column 23 can slide or rotate relative to the inner wall of the locking ring 24, and friction force between the rotary column 23 and the inner wall of the locking ring 24 is reduced.

In other embodiments, the locking ring 24 is further provided with a clamping table 242, the clamping table 242 is disposed on an outer wall of the locking ring 24, meanwhile, a clamping groove is disposed on an inner surface of the external device, the clamping table 242 is clamped with the clamping groove, the number of the clamping tables 242 can be one or more, the clamping table 242 is used for increasing friction force between the locking ring 24 and the external device, and situations of rotation, slipping and the like between the locking ring 24 and the external device caused by excessive force of a user when the functional accessory is replaced are avoided. The shape of the clamping table 242 may be a rectangular parallelepiped, a cylindrical, or the like, and the shape of the clamping groove is adaptively set according to the shape of the clamping table 242. It should be understood that the locking ring 24 may be provided without the clamping table 242, and the locking ring 24 and the housing may be fixed more firmly by grooving or increasing surface roughness on the outer ring of the locking ring 24.

With continued reference to fig. 1 and 2, the first shaft seat 21 includes a first base 210, a first annular wall 211 and a second annular wall 212, the first annular wall 211 and the second annular wall 212 are disposed on the first base 210 at intervals, the first annular wall 211, the second annular wall 212 and the first base 210 enclose a housing cavity 214 together, the second shaft seat 22 is rotatably disposed in the housing cavity 214, and the second shaft seat 22, the first annular wall 211, the second annular wall 212 and the locking ring 24 enclose a limiting space 25 together, so that the rotating post 23 is movably housed in the limiting space 25.

The side wall of the second shaft seat 22 is provided with a first protruding portion 223 and an abutting plane 225, the surface of the first annular wall 211 facing the accommodating cavity 214 is provided with a first limiting groove 2110, the first protruding portion 223 is accommodated in the first limiting groove 2110, the first protruding portion 223 can move in the first limiting groove 2110, when the first rotating shaft 11 is driven, the first rotating shaft 11 drives the first shaft seat 21 to rotate, one of the first annular wall 211 and the second annular wall 212 pushes the rotating column 23 to rotate relative to the locking ring 24, and the side wall of the first limiting groove 2110 pushes the first protruding portion 223 to push the second shaft seat 22 to rotate. Further, the abutment plane 225, the first annular wall 211, the second annular wall 212 and the locking ring 24 together enclose a limiting space 25.

Still further, the rotary post 23 includes a first rotary post 231 and a second rotary post 232, the abutment plane 225 includes a first abutment plane 2251 and a second abutment plane 2252, and the limit space 25 includes a first limit space 251 and a second limit space 252. The first limiting space 251 is defined by the first contact plane 2251, one end of the first annular wall 211, one end of the second annular wall 212, and the locking ring 24, and the second limiting space 252 is defined by the second contact plane 2252, the other end of the first annular wall 211, the other end of the second annular wall 212, and the locking ring 24. The first rotating post 231 is located in the first limiting space 251, and the second rotating post 232 is located in the second limiting space 252.

The other side wall of the second shaft seat 22 is provided with a second protruding portion 224, the surface of the second annular wall 212 facing the accommodating cavity 214 is provided with a second limiting groove 2120, the first limiting groove 2110 and the second limiting groove 2120 are centrosymmetric, the second protruding portion 224 and the first protruding portion 223 are also centrosymmetric, the second protruding portion 224 is accommodated in the second limiting groove 2120, and the second protruding portion 224 can move in the second limiting groove 2120. When the first shaft seat 21 is driven, the first shaft seat 21 rotates, one of the first annular wall 211 and the second annular wall 212 pushes the rotating post 23 to rotate relative to the locking ring 24, and the side wall of the second limiting groove 2120 abuts against the second protruding portion 224 to push the second shaft seat 22 to rotate. Specifically, the first rotating post 231 and the second rotating post 232 can rotate relative to the locking ring 24 under the driving of the first shaft seat 21, but the first rotating post 231 and the second rotating post 232 can change the stress direction under the driving of the second shaft seat 22, so that the first rotating post 231, the second rotating post 232 and the second shaft seat 22 are self-locked relative to the locking ring 24.

In other embodiments, referring to fig. 3, a side wall of the second shaft seat 22 is provided with a third limiting groove 2230, a surface of the first annular wall 211 facing the accommodating cavity 214 is provided with a third protrusion 2130, the third protrusion 2130 is accommodated in the third limiting groove 2230, and the third protrusion 2130 can move in the third limiting groove 2230. When the first shaft seat 21 is driven, the first shaft seat 21 rotates, one of the first annular wall 211 and the second annular wall 212 pushes the rotating post 23 to rotate relative to the locking ring 24, and the side wall of the third protruding portion 2130 abuts against the third limiting groove 2230, so as to push the second shaft seat 22 to rotate. It is understood that the number of the third protrusions 2130 may be one or more, and may be adjusted according to the actual size of the self-locking mechanism 2. It should be noted that the third limiting groove 2230 of the second shaft seat 22 may be designed with the first protruding portion 223 or may not be designed with the first protruding portion 223, so long as the above-mentioned abutting pushing function can be completed.

With continued reference to fig. 3, the other side wall of the second shaft seat 22 is provided with a fourth limiting groove 2240, a fourth protrusion 2140 is disposed on a surface of the second annular wall 212 facing the accommodating cavity, the fourth protrusion 2140 is accommodated in the fourth limiting groove 2240, and the fourth protrusion 2140 can move in the fourth limiting groove 2240. When the first rotating shaft 11 is driven, the first rotating shaft 11 drives the first shaft seat 21 to rotate, one of the first annular wall 211 and the second annular wall 212 pushes the rotating post 23 to rotate relative to the locking ring 24, and the side wall of the fourth protruding portion 2140 abuts against the fourth limiting groove 2240 to push the second shaft seat 22 to rotate. It can be understood that the third limiting groove 2230 and the fourth limiting groove 2240 formed on the second shaft seat 22 are symmetrical about the center, and the third protruding portion 2130 and the fourth protruding portion 2140 formed on the first shaft seat 21 are symmetrical about the center. The number of the fourth protruding parts 2140 may be one or more, and may be adjusted according to the actual size of the self-locking mechanism 2.

It should be noted that, in other embodiments, as shown in fig. 4, the first shaft seat 21 of the self-locking mechanism 2 is provided with more than two annular walls, that is, a third annular wall, a fourth annular wall, etc. may be provided in addition to the first annular wall 211 and the second annular wall 212, and the abutment planes provided by the corresponding second shaft seats 22 correspondingly increase.

It should be noted that the central axes of symmetry of the first shaft seat 21, the second shaft seat 22 and the locking ring 24 are collinear, the rotary column 23 adopts a cylinder, and the central axis of the rotary column 23 is parallel to the central axis of symmetry of the locking ring 24.

The first shaft seat 21 is provided with a first mounting hole 213, the first mounting hole 213 is used for mounting a rotating shaft of the driving piece, the second shaft seat 22 is provided with a second mounting hole 226, the second mounting hole 226 is used for mounting a part to be rotated, and the symmetrical central axes of the first mounting hole 213 and the second mounting hole 226 are collinear with the symmetrical central axis of the locking ring 24.

The side of the second shaft seat 22 facing away from the first shaft seat 21 may further be provided with an extension seat 227, where the extension seat 227 is disposed around the second mounting hole 226, so as to increase the contact area between the second shaft seat 22 and the component to be rotated, so that the second shaft 31 and the second shaft seat 22 are connected more firmly. It is to be understood that the shape of the first mounting hole 213 may be set according to the end of the first shaft 11, may be square, irregular, etc., and similarly, the shape of the second mounting hole 226 may be set according to the end of the second shaft 31, and the shape thereof is not limited as long as the purpose of transmitting shaft work can be achieved.

The self-locking mechanism 2 of the embodiment of the utility model comprises a first shaft seat 21, a locking ring 24, a second shaft seat 22 and a rotating column 23, wherein the first shaft seat 21 comprises a first seat body 210, a first annular wall 211 and a second annular wall 212, the first annular wall 211 and the second annular wall 212 are arranged on the first seat body 210 at intervals, and a containing cavity 214 is enclosed by the first annular wall 211, the second annular wall 212 and the first seat body 210 together; the locking ring 24 is sleeved on the outer wall of the first shaft seat 21, and the locking ring 24 is used for being fixed with external equipment; the second shaft seat 22 is rotatably disposed in the accommodating cavity 212, and the second shaft seat 22, the first annular wall 211, the second annular wall 212 and the locking ring 24 together enclose a limiting space 25; the rotating column 23 is movably accommodated in the limiting space 25; when the first shaft seat 21 is driven, one of the first annular wall 211 and the second annular wall 212 synchronously pushes the second shaft seat 22 and the rotary column 23 to rotate relative to the locking ring 24; when the second shaft housing 22 is driven, the rotation post 23 catches the second shaft housing 22 and the lock ring 24, and does not allow the second shaft housing 22 to rotate relative to the lock ring 24. Through the mode, the self-locking function of the self-locking mechanism 2 can be realized, the service life is longer, and the use experience of a user is improved.

For the mill of the embodiment of the present utility model, referring to fig. 4, the mill is a device commonly used in the industry and medical field. The grinding machine comprises a shell (not shown), a driving mechanism 1, an output mechanism 3 and the self-locking mechanism 2, wherein the driving mechanism 1 is arranged in the shell, the self-locking mechanism 2 is fixed on the shell, the output mechanism 3 is rotatably arranged in the shell, one end of the self-locking mechanism 2 is connected with the driving mechanism 1, and the other end of the self-locking mechanism 2 is connected with the output mechanism 3. The self-locking mechanism 2 can realize that the driving mechanism 1 can drive the output mechanism 3, but the output mechanism 3 can not reversely drive the driving mechanism 1, so that the self-locking function of the output mechanism 3 relative to the shell is realized. It will be appreciated that the power source used by the mill may be an electrical or air source, but also by other engines, etc.

For the above-mentioned driving mechanism 1, please continue to refer to fig. 4, the driving mechanism 1 is provided with a first rotating shaft 11 and a rotating module 12, one end of the first rotating shaft 11 is disposed on the rotating module 12, the other end of the first rotating shaft 11 is connected with the first shaft seat 21 of the self-locking mechanism 2, and the rotating module 12 drives the first rotating shaft 11 to rotate. It will be appreciated that in the embodiment using a power source as a power source, the driving mechanism 1 is a motor, the first rotating shaft 11 is an output shaft of the motor, the driving module includes a rotor and a stator, and the first rotating shaft 11 is disposed on the rotor; in the embodiment adopting the air source as the power source, the rotating module 12 is provided with a turbine, the first rotating shaft 11 is connected with the turbine, the air source blows the turbine to rotate, the turbine drives the first rotating shaft 11 to rotate, and then the first rotating shaft 11 drives the output mechanism 3 through the self-locking mechanism 2; in embodiments employing engine drive, the rotation module 12 may be an associated decelerator or accelerator, provided that the rotation of the first shaft 11 is effected. The first shaft 11 of the driving mechanism 1 may be rotated in either reverse or forward directions, and the first shaft 11 may not be affected to drive the output mechanism 3 by the self-locking mechanism 2.

For the output mechanism 3, referring to fig. 1 and 2, the output mechanism 3 is provided with a second rotating shaft 31, a bearing 32 and an accessory mounting seat 33, the second rotating shaft 31 is mounted on an inner ring of the bearing 32, an outer ring of the bearing 32 is disposed on the housing, one end of the second rotating shaft 31 is connected with the second shaft seat 22 of the self-locking mechanism 2, and the other end of the second rotating shaft 31 protrudes out of the housing and is connected with the accessory mounting seat 33. The accessory mount 33 may be used to mount functional accessories, which may enable the mill to have different functions. It is understood that the accessory mounting base 33 may be integrally formed with the second rotating shaft 31, for example, may be non-integrally formed, and the accessory mounting base 33 and the second rotating shaft 31 may be fixedly connected by screwing, welding, clamping, or the like. In some embodiments, the bearing 32 may be omitted, with shaft work being output directly without the bearing 32.

It should be noted that, when the first rotation shaft 11 is driven, the self-locking mechanism 2 drives the output mechanism 3 to rotate relative to the housing, and when the output mechanism 3 is driven, the self-locking mechanism 2 is locked relative to the housing and the output mechanism 3 is not allowed to rotate relative to the housing.

The grinding machine comprises a shell, a driving mechanism 1, a self-locking mechanism 2 and an output mechanism 3, wherein the driving mechanism 1 is provided with a first rotating shaft 11, the driving mechanism 1 is installed in the shell, the self-locking mechanism 2 is fixed in the shell, a self-locking connecting mechanism is connected with the first rotating shaft 11, the output mechanism 3 is detachably installed on the self-locking mechanism 2, the output mechanism 3 is provided with a second rotating shaft 31, the second rotating shaft 31 is used for connecting functional accessories, the self-locking mechanism 2 is used for driving the output mechanism 3 to rotate relative to the shell when the first rotating shaft 11 is driven, the self-locking mechanism 2 is locked relative to the shell when the output mechanism 3 is driven, the output mechanism 3 is not allowed to rotate relative to the shell, and therefore the use experience of a user can be improved.

It should be noted that the description of the present utility model and the accompanying drawings illustrate preferred embodiments of the present utility model, but the present utility model may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, which are not to be construed as additional limitations of the utility model, but are provided for a more thorough understanding of the present utility model. The above-described features are further combined with each other to form various embodiments not listed above, and are considered to be the scope of the present utility model described in the specification; further, modifications and variations of the present utility model may be apparent to those skilled in the art in light of the foregoing teachings, and all such modifications and variations are intended to be included within the scope of this utility model as defined in the appended claims.

Claims (10)

1. A self-locking mechanism, comprising:

the first shaft seat comprises a first seat body, a first annular wall and a second annular wall, wherein the first annular wall and the second annular wall are arranged on the first seat body at intervals, and an accommodating cavity is formed by the first annular wall, the second annular wall and the first seat body in a surrounding mode;

the locking ring is sleeved on the outer wall of the first shaft seat and is used for being fixed with external equipment;

the second shaft seat is rotationally arranged in the accommodating cavity, and a limiting space is enclosed by the second shaft seat, the first annular wall, the second annular wall and the locking ring together;

the rotating column is movably accommodated in the limiting space;

when the first shaft seat is driven, one of the first annular wall and the second annular wall synchronously pushes the second shaft seat and the rotating column to rotate relative to the locking ring;

when the second shaft seat is driven, the rotary column clamps the second shaft seat and the locking ring, and the second shaft seat is not allowed to rotate relative to the locking ring.

2. The self-locking mechanism of claim 1, wherein,

the side wall of the second shaft seat is provided with a first protruding part and an abutting plane, the surface of the first annular wall facing the accommodating cavity is provided with a first limit groove, the first protruding part is accommodated in the first limit groove, the first protruding part can move in the first limit groove, and a limit space is enclosed by the abutting plane, the first annular wall, the second annular wall and the locking ring together;

when the first shaft seat is driven, one of the first annular wall and the second annular wall pushes the rotating column to rotate relative to the locking ring, and the side wall of the first limiting groove abuts against the first protruding part to push the second shaft seat to rotate;

when the second shaft seat is driven, the rotary column is clamped with the abutting plane and the locking ring, and the second shaft seat is not allowed to rotate relative to the locking ring.

3. The self-locking mechanism of claim 2, wherein

The rotary column comprises a first rotary column and a second rotary column, and the abutting plane comprises a first abutting plane and a second abutting plane;

the limiting space comprises a first limiting space and a second limiting space, the first limiting space is formed by the first abutting plane, one end of the first annular wall, one end of the second annular wall and the locking ring in a surrounding mode, and the second limiting space is formed by the second abutting plane, the other end of the first annular wall, the other end of the second annular wall and the locking ring in a surrounding mode;

the first rotating column is located in a first limiting space, and the second rotating column is located in a second limiting space.

4. The self-locking mechanism according to claim 3, wherein,

the side wall of the second shaft seat is provided with a second protruding part, the surface of the second annular wall facing the accommodating cavity is provided with a second limiting groove, the second protruding part is accommodated in the second limiting groove, and the second protruding part can move in the second limiting groove;

when the first rotating shaft is driven, the first rotating shaft drives the first shaft seat to rotate, one of the first annular wall and the second annular wall pushes the rotating column to rotate relative to the locking ring, and the side wall of the second limiting groove abuts against the second protruding portion to push the second shaft seat to rotate.

5. The self-locking mechanism of claim 1, wherein,

a third limiting groove is formed in one side wall of the second shaft seat, a third protruding portion is arranged on the surface, facing the accommodating cavity, of the first annular wall, the third protruding portion is accommodated in the third limiting groove, and the third protruding portion can move in the third limiting groove;

when the first shaft seat is driven, one of the first annular wall and the second annular wall pushes the rotating column to rotate relative to the locking ring, and the side wall of the third protruding portion abuts against the third limiting groove to push the second shaft seat to rotate.

6. The self-locking mechanism of claim 5, wherein,

a fourth limiting groove is formed in the other side wall of the second shaft seat, a fourth protruding portion is arranged on the surface, facing the accommodating cavity, of the second annular wall, the fourth protruding portion is accommodated in the fourth limiting groove, and the fourth protruding portion can move in the fourth limiting groove;

when the first shaft seat is driven, one of the first annular wall and the second annular wall pushes the rotating column to rotate relative to the locking ring, and the side wall of the fourth protruding portion abuts against the fourth limiting groove to push the second shaft seat to rotate.

7. The self-locking mechanism of claim 1, wherein,

the outer ring of the locking ring is provided with a clamping table which is used for being fixed with external equipment.

8. The self-locking mechanism of claim 1, wherein,

the central axes of symmetry of the first shaft seat, the second shaft seat and the locking ring are collinear, and the central axis of the rotating column is parallel to the central axis of symmetry of the locking ring.

9. The self-locking mechanism of claim 1, wherein,

the first shaft seat is provided with a first mounting hole, the first mounting hole is used for mounting a rotating shaft of the driving piece, the second shaft seat is provided with a second mounting hole, the second mounting hole is used for mounting a part to be rotated, and the symmetrical central axes of the first mounting hole and the second mounting hole are collinear with the symmetrical central axis of the locking ring.

10. A mill comprising a housing, a drive mechanism, an output mechanism and a self-locking mechanism as claimed in any one of claims 1 to 9;

the driving mechanism is provided with a first rotating shaft, the driving mechanism is installed in the shell, a locking ring of the self-locking mechanism is fixed on the shell, the first rotating shaft is connected to a first shaft seat of the self-locking mechanism, the output mechanism is connected to a second shaft seat, the output mechanism is provided with a second rotating shaft, and the second rotating shaft is used for connecting functional accessories.