CN112847173A

CN112847173A - Self-locking clamping mechanism and pressing device thereof

Info

Publication number: CN112847173A
Application number: CN201911195369.1A
Authority: CN
Inventors: 邱小亮
Original assignee: Peitian Robot Technology Co Ltd
Current assignee: Peitian Robot Technology Co Ltd
Priority date: 2019-11-28
Filing date: 2019-11-28
Publication date: 2021-05-28
Anticipated expiration: 2039-11-28
Also published as: CN112847173B

Abstract

The application provides a self-locking clamping mechanism and a pressing device thereof. The clamping mechanism includes: a fixing frame, a self-locking assembly, a clamping assembly and a reset assembly; the self-locking assembly and the clamping assembly are both installed on the fixing frame ;The self-locking component includes an eccentric wheel, which abuts against the clamping component, and is used to drive the clamping component to clamp the product and lock the clamping state of the clamping component; the reset component is installed on the fixing frame, and the self-locking component releases the In the tight state, it is used to automatically reset the clamping assembly. In the above manner, the clamping mechanism can clamp and fix the material to be processed, and lock the clamping state of the clamping mechanism. The design of the reset component can also realize the automatic reset of the clamping mechanism to prevent the rebound of the clamping component.

Description

Self-locking clamping mechanism and pressing device thereof

Technical Field

The application relates to the technical field of manual fixtures, in particular to a self-locking clamping mechanism and a pressing device thereof.

Background

At present, the precision requirement of mechanical parts is increasingly improved, and the requirements on the positioning and pressing effects of the clamp are also inevitably improved. The clamp is mainly used for reducing the time of workpiece processing so as to improve the labor productivity and reduce the labor intensity of workers. The clamping mode of the common clamp is to adopt the cooperation of nuts and bolts to carry out compression fixation. The fixing mode has complicated operation and low efficiency.

Disclosure of Invention

An aspect of the present application provides a self-locking clamping mechanism, where the clamping mechanism includes: the device comprises a fixing frame, a self-locking assembly, a clamping assembly and a resetting assembly; the self-locking assembly and the clamping assembly are both arranged on the fixed frame; the self-locking assembly comprises an eccentric wheel, the eccentric wheel is abutted to the clamping assembly and used for driving the clamping assembly to clamp a product and locking the clamping state of the clamping assembly; the reset assembly is arranged on the fixing frame and is used for automatically resetting the clamping assembly when the self-locking assembly releases the clamping state.

Another aspect of the embodiments of the present application provides a pressing device, including: the device comprises a support frame and two clamping mechanisms; each of the clamping mechanisms includes: the device comprises a fixing frame, a self-locking assembly, a clamping assembly and a resetting assembly; the fixing frames of the two clamping mechanisms are respectively arranged on the supporting frame; the self-locking assembly and the clamping assembly are both arranged on the fixed frame; the self-locking assembly comprises an eccentric wheel, the eccentric wheel is abutted to the clamping assembly and used for driving the clamping assembly to clamp a product and locking the clamping state of the clamping assembly; the reset assembly is arranged on the fixing frame and is used for automatically resetting the clamping assembly when the self-locking assembly releases the clamping state.

The self-locking clamping mechanism and the pressing device thereof provided by the embodiment of the application are characterized in that a self-locking assembly, a clamping assembly and a resetting assembly are arranged on a fixing frame. The self-locking assembly comprises an eccentric wheel, the eccentric wheel is abutted to the clamping assembly and used for driving the clamping assembly to clamp a product and locking the clamping state of the clamping assembly; the reset assembly is arranged on the fixing frame and is used for automatically resetting the clamping assembly when the self-locking assembly releases the clamping state. Due to the characteristic that the eccentric wheel does not rotate around the circle center and the arrangement that the eccentric wheel is abutted to the clamping assembly, the eccentric wheel can drive the clamping assembly to clamp a product only by rotating, and complex operation is not needed. Therefore, the operation convenience is improved, the time required by clamping and fixing is saved, and the production efficiency is improved.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

FIG. 1 is a schematic diagram of a clamping mechanism 10 according to an embodiment of the present application;

FIG. 2 is a schematic structural view of the fixing frame 100 in FIG. 1;

FIG. 3 is a schematic view of the connection structure of self-locking assembly 200 and fixing frame 100 in FIG. 1;

FIG. 4 is a schematic view of the connection structure of the clamping assembly 300 with the fixing frame 100 and the self-locking assembly 200 in FIG. 1;

FIG. 5 is a schematic structural view of the drive shaft 310 of FIG. 4;

FIG. 6 is a schematic diagram of the movable arm 330 of FIG. 4;

fig. 7 is a schematic view of the connection structure of the reduction assembly 400, the fixing frame 100 and the clamping assembly 300 in fig. 1;

FIG. 8 is a partial sectional view of the clamping mechanism 10 taken along the direction IX-IX;

FIG. 9 is a schematic view of the clamping mechanism 10 of FIG. 1 in a clamped state;

FIG. 10 is a schematic partial cross-sectional view of the clamping mechanism 10 of FIG. 9 taken along the direction IV-IV;

FIG. 11 is a schematic structural view of the clamping mechanism 10 of FIG. 1 in a released condition;

FIG. 12 is a schematic partial cross-sectional view of the clamping mechanism 10 of FIG. 11 taken along the direction VI-VI;

fig. 13 is a schematic structural diagram of a pressing device 50 according to another embodiment of the present application.

Detailed Description

The embodiment of the application provides a self-locking clamping mechanism. The present application will be described in further detail with reference to the following drawings and examples. It is to be noted that the following examples are only illustrative of the present application, and do not limit the scope of the present application. Likewise, the following examples are only some examples and not all examples of the present application, and all other examples obtained by a person of ordinary skill in the art without any inventive work are within the scope of the present application.

Reference in the specification to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the specification. The appearances of the phrase 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. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.

Referring to fig. 1, fig. 1 is a schematic structural diagram of a clamping mechanism 10 according to an embodiment of the present application.

As shown in fig. 1, the clamping mechanism 10 includes: mount 100, self-locking assembly 200, clamping assembly 300, and reduction assembly 400. The self-locking assembly 200, the clamping assembly 300 and the resetting assembly 400 are all mounted on the fixing frame 100, and the self-locking assembly 200 is abutted to the clamping assembly 300 and used for driving the clamping assembly 300 to clamp and locking the clamping state of the clamping assembly 300; the reset assembly 400 is slidably coupled to the clamping assembly 300, and is used to reset the clamping assembly 300 and prevent the clamping assembly 300 from rebounding when the clamping assembly 300 is released from the clamping state.

Referring to fig. 2, fig. 2 is a schematic structural diagram of the fixing frame 100 in fig. 1.

As shown in fig. 2, the fixing frame 100 includes: a top wall 110, a bottom wall 120, side walls 130, and a retaining plate 140. The top wall 110 and the bottom wall 120 are disposed opposite to each other, and the side wall 130 connects the side edges of the top wall 110 and the bottom wall 120 to form an accommodating space 150. The fixing plate 140 is disposed on a surface of the top wall 110 away from the bottom wall 120, and is fixedly connected to the top wall 110. Specifically, the top wall 110, the bottom wall 120 and the side wall 130 may be an integrally formed structure, and the three are surrounded to form the accommodating space 150. The accommodating space 150 may be a relatively closed space to protect the internal structure from the external environment and prevent the internal structure from being damaged. The fixing plate 140 is overlapped and fixedly disposed on the top wall 110, and may be fixedly connected by welding, bonding, riveting, and the like, for example, to increase the structural strength of the top wall 110. In addition, in some embodiments, the top wall 110, the bottom wall 120 and the side wall 130 may also be independent components, and it is only necessary to ensure that the three are fixedly connected by welding, bonding, riveting and the like to enclose the accommodating space 150. The fixing plate 140 may also be integrally formed with the top wall 110 to make the structure thereof more robust.

Referring to fig. 3, fig. 3 is a schematic view illustrating a connection structure between the self-locking assembly 200 and the fixing frame 100 in fig. 1.

As shown in fig. 3, the self-locking assembly 200 includes: eccentric wheel 210, mounting bracket 220 and rotating shaft 230. The eccentric 210 is rotatably connected to the mounting bracket 220 via a rotating shaft 230. The mounting bracket 220 is disposed on a side of the fixing plate 140 away from the top wall 110 and is fixedly connected to the fixing plate 140. Specifically, the mounting bracket 220 includes: a base 221 and a support arm 222. The base 221 is disposed on a side of the fixing plate 140 away from the top wall 110, the supporting arm 222 is disposed on a side of the base 221 away from the fixing plate 140, and the base 221 and the supporting arm 222 are integrally formed. The eccentric wheel 210 is disposed on the supporting arm 222 and is rotatably connected to the supporting arm 222 via a rotating shaft 230. The eccentric wheel 210 is further provided with a handle 211, and an operator can pull the eccentric wheel 210 through the handle 211 to rotate the eccentric wheel 210 based on the mounting bracket 220. In addition, in the case that the fixing plate 140 and the top wall 110 are integrally formed or the fixing plate 140 does not exist, the base 221 may be directly disposed on a surface of the top wall 110 away from the bottom wall 120 and fixedly connected to the top wall 110. In some embodiments, the mounting bracket 220 may be an integrally formed structure with the fixing plate 140; or the mounting bracket 220 may be of unitary construction with the top wall 110.

Referring to fig. 4 to 6 in conjunction with fig. 2, fig. 4 is a schematic view illustrating a connection structure of the clamping assembly 300, the fixing frame 100 and the self-locking assembly 200 in fig. 1, fig. 5 is a schematic view illustrating a structure of the transmission shaft 310 in fig. 4, and fig. 6 is a schematic view illustrating a structure of the movable arm 330 in fig. 4.

As shown in fig. 4 to 6, the clamping assembly 300 includes: drive shaft 310, drive rod 320, moveable arm 330, stationary arm 340, and positioning member 350. The transmission shaft 310 penetrates through the fixing plate 140 and the top wall 110, and extends into the accommodating space 150. The drive shaft 310 includes: contact portion 311, sliding portion 312, and connecting portion 313. The abutting portion 311, the sliding portion 312, and the connecting portion 313 may be an integrally molded structure. For example, in the present embodiment, a hole (not shown) is formed on the base 221, and the abutting portion 311 passes through the hole to abut against the eccentric wheel 210. The outer edge of the contact portion 311 is arc-shaped and is tangent to the outer edge of the eccentric 210, so that the contact portion 311 and the eccentric 210 can slide. When an operator pulls the handle 211 to rotate the eccentric 210 based on the mounting frame 220, the eccentric 210 pushes the abutting portion 311 to move toward the bottom wall 120, so as to displace the transmission shaft 310 to achieve the driving function of the self-locking assembly 200. The sliding portion 312 is disposed on the surface of the abutting portion 311 away from the eccentric 210, and when the abutting portion 311 moves toward the bottom wall 120, a partial region of the sliding portion 312 is disposed in the accommodating space 150. The connecting portion 313 is disposed on a surface of the sliding portion 312 away from the abutting portion 311, and is fixedly connected to the driving rod 320 in the accommodating space 150.

The movable arm 330 includes: the rotating lever 331 and the claw hook portion 332, and the rotating lever 331 and the claw hook portion 332 may be an integrally formed structure. One end of the rotating rod 331 is disposed in the accommodating space 150 and is rotatably connected to the inner surface of the sidewall 130, for example, by bolts and rivets. The other end of the rotating rod 331 penetrates through the bottom wall 120 and extends out of the accommodating space 150. For example, in this embodiment, the bottom wall 120 is provided with a limiting opening 1201, and the limiting opening 1201 is used to limit the rotation range of the rotating rod 331. The other end of the rotating rod 331 penetrates through the bottom wall 120 through the limiting opening 1201, extends out of the accommodating space 150, and is reversely bent to form the claw portion 332. The claw part 332 is used for fastening the material to be processed and is matched with the fixing arm 340 to clamp and fix the material. The rotating rod 331 is further provided with a slide rail 3301 in the area of the accommodating space 150. A partial region of the driving rod 320 is disposed on the slide rail 3301 and can slide according to the track of the slide rail 3301. The fixing arm 340 is disposed on a surface of the bottom wall 120 away from the top wall 110 and is fixedly connected to the bottom wall 120. The fixing arm 340 is further provided with a positioning member 350 for positioning the material to be processed. After positioning is complete, the drive shaft 310, drive rod 320, movable arm 330, and fixed arm 340 cooperate to perform the clamping function of the clamping assembly 300. In addition, in some embodiments, the rotating rod 331 can also be rotatably connected to the outer surface of the side wall 130, and only a sliding rail identical to the sliding rail 3301 needs to be formed in an area of a corresponding position between the side wall 130 and the sliding rail 3301, so that the driving rod 320 is disposed on the rotating rod 331 and the sliding rail 3301 on the side wall 130, and when sliding along the sliding rail 3301, drives the movable arm 330 to rotate.

Referring to fig. 7 to 8, fig. 7 is a schematic view illustrating a connection structure of the reduction assembly 400, the fixing frame 100 and the clamping assembly 300 in fig. 1, and fig. 8 is a schematic view illustrating a partial cross section of the clamping mechanism 10 along the ix-ix direction.

As shown in fig. 7 to 8, the reset assembly 400 includes: a mounting member 410 and a resilient member 420. One end of the mounting member 410 is disposed on the fixing plate 140 and fixedly connected to the fixing plate 140, and the other end of the mounting member 410 extends into the accommodating space 150 through the top wall 110. Specifically, a first through hole 1401 is formed on the surface of the fixing plate 140 close to the eccentric wheel 210, and a second through hole 1101 is formed on the side of the top wall 110 close to the fixing plate 140. The aperture of the first through-hole 1401 is larger than the aperture of the second through-hole 1101, and the center of the first through-hole 1401 overlaps with the center of the second through-hole 1101. The mounting member 410 includes: a fixing portion 4101 and an attachment portion 4102. The fixing portion 4101 is disposed in the first through hole 1401, and the mounting portion 4102 is disposed in the accommodating space 150 through the second through hole 1101. The mounting portion 4102 is also provided with a placement space 4102 a. The fixing portion 4101 and the mounting portion 4102 may be integrally formed. In addition, in some embodiments, the fixing portion 4101 may be an integral structure with the fixing plate 140, and the mounting portion 4102 is disposed in the accommodating space 150 through the top wall 110; or in the case that the fixing plate 140 is not present, the fixing portion 4101 may be integrally formed with the top wall 110, and the mounting portion 4102 is disposed in the accommodating space 150.

The transmission shaft 310 is disposed through the mounting member 410 and slidably connected to the mounting member 410. When the eccentric 210 drives the contact portion 311 to displace, the sliding portion 312 is provided in the housing space 4102a in a partial region thereof, and is slidably connected to the inner wall of the mounting portion 4102. The connection portion 313 passes through the surface of the mounting portion 4102 opposite to the top wall 110, extends into the accommodating space 150 to the driving rod 320, and is fixedly connected to the driving rod 320. For example, a third through hole 4102b is opened on a surface of the mounting part 4102 opposite to the top wall 110, and the connection part 313 passes through the mounting part 410 through the third through hole 4102b and extends into the accommodating space 150. In this embodiment, the mounting member 410 may be a cylindrical member having a hollow portion, such as a cylinder tube, to facilitate the sliding of the sliding portion 312.

The elastic member 420 is disposed in the placing space 4102a, one end of the elastic member 420 abuts against the surface of the sliding portion 312 away from the eccentric wheel 210, and the other end of the elastic member 420 abuts against the sliding portion 312. The elastic member 420 is used to cooperate with the mounting member 410 and the driving shaft 310 to reset under the action of its own elasticity when the self-locking assembly 200 is released from the clamping state, and simultaneously prevent the driving shaft 310 from rebounding. In this embodiment, the elastic member 420 may be a deformable member such as a spring. In some embodiments, the elastic member 420 may also be an elastic material such as rubber, plastic, and foam, and specifically, the elastic material may be filled in the space between the sliding portion 312 and the mounting portion 4102, so that the elastic material is elastically deformed under the compression of the sliding portion 312.

Referring to fig. 9 to 12, fig. 9 is a schematic structural view of the clamping mechanism 10 in fig. 1 in a clamping state, fig. 10 is a schematic partial sectional view of the clamping mechanism 10 in fig. 9 along a direction iv-iv, fig. 11 is a schematic structural view of the clamping mechanism 10 in fig. 1 in a loosening state, and fig. 12 is a schematic partial sectional view of the clamping mechanism 10 in fig. 11 along a direction vi-vi.

As shown in fig. 9 to 12, in the present embodiment, a positioning member 350 is first used to position the material to be processed. Specifically, the positioning element 350 may be a positioning pin, and a positioning hole is formed on the material to be processed. Before the clamping mechanism 10 is used for clamping, the positioning pin is inserted into the positioning hole to position the material to be processed. After the positioning is completed, the operator pulls the handle 211 to rotate the eccentric wheel 210, thereby pushing the abutting portion 311 in the first direction X. The sliding portion 312 slides into the placing space 4102a, and presses the elastic member 420. The connection portion 313 is influenced by the sliding portion 312 to move in the first direction X, and drives the driving rod 320 to displace. When the driving rod 320 moves in the first direction X, the driving rod 320 moves along the track of the sliding rail 3301, and the rotating rod 331 is driven to rotate based on the side wall 130, so that the movable arm 330 rotates, the claw hook portion 332 catches the material to be processed, and hooks the material to be processed to move in the direction of the fixed arm 340, and finally the material is clamped and fixed on the fixed arm 340, so as to achieve the clamping function of the clamping mechanism 10. Meanwhile, due to the wedge clamping characteristic of the eccentric wheel 210, and the direction of the elastic force generated by the elastic member 420 is different from the direction of the eccentric wheel 210 rotated by the force, the eccentric wheel 210 is not rebounded by the force, and the clamping state of the clamping assembly 300 is locked.

After the operator pulls the handle 211 to release the eccentric wheel 210, the elastic member 420 pushes the sliding portion 312 in a direction opposite to the first direction X under the action of its own elasticity, so as to drive the connecting portion 313 to move, and further, the driving rod 320 drives the movable arm 330 to move, so as to release the material to be processed. In this process, the abutting portion 311 abuts against the eccentric 210 all the time, and the eccentric 210 is prevented from rotating under the influence of gravity. The clamping and fixing of the material to be processed can be realized, meanwhile, the self-locking function of the clamping mechanism 10 is realized by the design of the eccentric wheel 210, the automatic resetting function of the clamping mechanism 10 is realized by the design of the elastic piece 420, and the rebound of the clamping assembly 300 is prevented.

According to the clamping mechanism 10 provided by the embodiment of the application, the self-locking assembly 200 and the clamping assembly 300 are adopted to realize the product clamping function of the clamping mechanism 10, and the reset assembly 400 is adopted to realize the reset function of the clamping mechanism 10. The self-locking assembly 200 comprises an eccentric wheel 210, and the eccentric wheel 210 is abutted to the clamping assembly 300, and the eccentric wheel 210 does not rotate around the center of a circle, so that the eccentric wheel 210 can drive the clamping assembly 300 to move only by rotating, and a product is clamped. The process is relatively simple in operation, the time for clamping and fixing is saved, and the production efficiency is improved. Meanwhile, due to the wedge characteristic of the eccentric wheel 210, the eccentric wheel 210 can also lock the clamping state of the clamping assembly 300, so that the clamping stability is improved, and the looseness is avoided.

Referring to fig. 13, fig. 13 is a schematic structural diagram of a pressing device 50 according to another embodiment of the present application.

As shown in fig. 13, the pressing device 50 includes: a support bracket 500 and two clamping mechanisms 10. Specifically, the supporting bracket 500 includes: a first support plate 510, a second support plate 520, a connection frame 530, and a handle 540. Wherein the first support plate 510 and the second support plate 520 are oppositely disposed, and the connecting frame 530 is connected to the first support plate 510 and the second support plate 520 and is fixedly connected to both. The connecting frame 530 may be a member such as an aluminum profile. Both clamping mechanisms 10 are disposed on the first support plate 510 in the same manner. For example, in this embodiment, the mounting frame 220 of the self-locking assembly 200 is disposed on a surface of the first support plate 510 facing away from the second support plate 520, and is fixedly connected to the first support plate 510. The fixing plate 140 of the fixing frame 100 is disposed on a surface of the first support plate 510 opposite to the second support plate 520, and is fixedly connected to the first support plate 510. The mounting frame 220 corresponds to the fixing frame 100 in position, and the first support plate 510 has a through groove 5101, through which the transmission shaft 310 can abut against the eccentric wheel 210, so as to implement the clamping function of the clamping mechanism 10. A handle 540 is provided on a side of the clamping mechanism 10 and on a surface of the first support plate 510 facing away from the second support plate 520 for an operator to carry the pressing device 50.

In the clamping mechanism 10 and the pressing device 50 thereof provided by the embodiment of the present application, the eccentric wheel 210 abuts against the transmission shaft 310, the transmission shaft 310 is fixedly connected with the driving rod 320, and the driving rod 320 is slidably connected with the movable arm 330. The eccentric wheel 210 drives the transmission shaft 310 to displace, the transmission shaft 310 drives the driving rod 320 to displace, and the driving rod 320 slides along the slide rail 3301 on the movable arm 330, so as to drive the movable arm 330 to clamp a product, thereby realizing the clamping and fixing functions of the clamping mechanism 10. Meanwhile, an operator can clamp the product only by pulling the eccentric wheel 210 to rotate, the operation process is relatively simple, the time for clamping and fixing the product is saved, and the production efficiency is improved.

Further, due to the wedge characteristic of the eccentric wheel 210 and the force-bearing direction of the transmission shaft 310 and the eccentric wheel 210 are not consistent, the eccentric wheel 210 can also lock the clamping state of the clamping assembly 300, so that the problem that the clamping mechanism 10 is loosened due to the influence of vibration in the product processing process is avoided, and the stability of the clamping mechanism 10 is improved. Meanwhile, the mounting member 410 and the elastic member 420 are designed on the driving shaft 310 such that one end of the elastic member 420 abuts the driving shaft 310 and the other end abuts the mounting member 410. After the eccentric wheel 210 is unlocked, due to the elastic force of the elastic member 420, the transmission shaft 310 can drive the movable arm 330 to release the product while keeping the state of abutting against the eccentric wheel 210, thereby realizing the function of automatic resetting of the clamping mechanism 10.

The above description is only a part of the embodiments of the present application, and not intended to limit the scope of the present application, and all equivalent devices or equivalent processes performed by the content of the present application and the attached drawings, or directly or indirectly applied to other related technical fields, are also included in the scope of the present application.

Claims

1. A self-locking clamping mechanism, wherein the clamping mechanism comprises: a fixing frame, a self-locking assembly, a clamping assembly and a reset assembly;

Both the self-locking assembly and the clamping assembly are mounted on the fixing frame;

The self-locking assembly includes an eccentric wheel, the eccentric wheel is in contact with the clamping assembly, and is used to drive the clamping assembly to clamp the product and lock the clamping state of the clamping assembly;

The reset assembly is installed on the fixing frame, and is used to automatically reset the clamp assembly when the eccentric wheel is released from the clamped state.

2. The clamping mechanism according to claim 1, wherein the fixing frame comprises: a top wall, a bottom wall and a side wall;

the top wall and the bottom wall are arranged oppositely;

the side wall connects the top wall and the bottom wall;

The top wall, the bottom wall and the side wall are enclosed to form an accommodating space; wherein:

the eccentric wheel is arranged on the side of the top wall away from the bottom wall, and is fixedly connected with the top wall;

The clamping assembly is arranged on the side wall and is rotatably connected with the side wall.

3. The clamping mechanism according to claim 2, wherein the fixing frame further comprises: a fixing plate;

The fixing plate is arranged on the side of the top wall away from the bottom wall, and is fixedly connected with the top wall;

The eccentric wheel is arranged on the side of the fixing plate away from the top wall, and is fixedly connected with the fixing plate.

4. The clamping mechanism according to claim 3, wherein the clamping assembly comprises: a transmission shaft, a driving rod, a movable arm, a fixed arm and a positioning member;

One end of the transmission shaft is in contact with the eccentric wheel;

The other end of the transmission shaft is passed through the reset assembly and extends into the accommodating space;

the driving rod is arranged in the accommodating space and is fixedly connected with the transmission shaft;

the movable arm is rotatably connected with the side wall and extends away from the top wall;

the drive rod is slidably connected with the movable arm;

the fixing arm is arranged on the side of the bottom wall away from the top wall, and is fixedly connected with the bottom wall;

The positioning member is arranged on the fixed arm for positioning the material to be processed;

The transmission shaft, the driving rod, the movable arm and the fixed arm cooperate to realize the clamping function.

5 . The clamping mechanism according to claim 4 , wherein the transmission shaft comprises: an abutting part, a sliding part and a connecting part; 5 .

The abutting portion, the sliding portion and the connecting portion are integrally formed;

the abutting portion abuts the eccentric;

The sliding portion is arranged on the side of the abutting portion away from the eccentric wheel, and a part of the sliding portion is arranged in the reset assembly when the sliding portion is in a clamped state;

The connecting portion is arranged on the side of the sliding portion away from the eccentric wheel, and extends toward the driving rod through the reset assembly, and is fixedly connected with the driving rod.

6. The clamping mechanism according to claim 5, wherein the self-locking assembly further comprises: a mounting bracket;

the eccentric wheel is rotatably connected with the mounting frame;

The installation is erected on the side of the fixing plate away from the top wall, and is fixedly connected with the fixing plate.

7. The clamping mechanism according to claim 5, wherein the reset assembly comprises: a mounting member and an elastic member;

One end of the mounting piece is arranged on the fixing plate and is fixedly connected with the fixing plate, and the other end of the mounting piece extends into the accommodating space;

The mounting piece is provided with a placement space;

A partial area of the sliding part is arranged in the placement space and is slidably connected with the mounting piece;

The connecting portion extends toward the driving rod through the mounting member, and is fixedly connected with the driving rod;

the elastic member is arranged in the placement space;

One end of the elastic member abuts on the side of the sliding portion away from the self-locking assembly, and the other end of the elastic member abuts on the surface of the mounting member opposite to the top wall;

When the self-locking assembly is released from the clamping state, the elastic member cooperates with the mounting member to reset the transmission shaft under the action of its own elastic force.

8. The clamping mechanism according to claim 4, wherein the movable arm is arranged in the accommodating space and is rotatably connected with the inner surface of the side wall;

The bottom wall is provided with a limit opening, and the movable arm extends toward the fixed arm through the limit opening;

The limit opening is used to limit the movable range of the movable arm.

9 . The clamping mechanism according to claim 8 , wherein the movable arm comprises: a rotating rod and a claw hook part, and the rotating rod and the claw hook part are an integrally formed structure; 10 .

One end of the rotating rod is arranged in the accommodating space, and is rotatably connected with the inner surface of the side wall;

The other end of the rotating rod extends toward the fixing arm through the limiting opening and is bent to form the hook portion.

10 . The clamping mechanism according to claim 9 , wherein a sliding rail is provided on the rotating rod, and the driving rod is connected with the sliding rail, wherein: 10 .

When the self-locking assembly drives the clamping assembly, the self-locking assembly pushes the transmission shaft in the direction of the bottom wall, and the transmission shaft drives the drive rod to displace, and the drive rod moves along the The slide rail slides so that the movable arm rotates and cooperates with the fixed arm to realize the clamping function.

11. A pressing device, characterized in that, the pressing device comprises: a support frame and two clamping mechanisms;

Each of the clamping mechanisms includes: a fixing frame, a self-locking component, a clamping component and a reset component;

The fixing frames of the two clamping mechanisms are respectively installed on the supporting frame;

The reset component is installed on the fixing frame, and is used to automatically reset the clamping component when the self-locking component is released from the clamping state.