Clamping mechanism and sleeve-folding machine

Abstract

The application relates to the technical field of sleeve cutting machines, in particular to a clamping mechanism and a sleeve cutting machine. The clamping mechanism comprises a fixed seat, a movable seat, a rotating shaft, a fixed clamping plate, a movable clamping plate and a pushing piece. The fixed clamping plate is connected to the fixed seat, the movable clamping plate is connected to the movable seat, and the rotating shaft is arranged through and connected to the fixed seat and the movable seat, so that the movable seat can rotate relative to the fixed seat. An air passage is formed in the fixed seat, the pushing piece is movably arranged in the air passage, and the pushing piece and the movable clamping plate are located on opposite sides of the rotating shaft. The pushing piece can extend out of the air passage in response to external force and apply force to the movable seat, so that the movable seat can rotate relative to the fixed seat around the rotating shaft and drive the movable clamping plate to rotate towards the fixed clamping plate. The clamping mechanism and the sleeve cutting machine provided by the application solve the problem that the cost of realizing the cutting piece clamping of the existing sleeve cutting machine is high.

Description

Technical Field

[0001] This application relates to the field of sleeve fork machine technology, and in particular to a clamping mechanism and a sleeve fork machine. Background Technology

[0002] Currently, the sewing of sleeve vents typically involves folding the corners of small fabric pieces first. Taking a sword-shaped sleeve vent as an example, part of the small fabric piece is folded to form the sword-shaped front of the vent, while another part is folded to form the shape of the back of the vent. In the traditional sword-shaped sleeve vent manufacturing process, a clamping mechanism holds the portion of the small fabric piece that forms the back of the vent and folds it upwards towards the sword-shaped part. Then, a large fabric piece is placed on top of the small fabric piece, with part of the large fabric piece clamped onto the small fabric piece. Finally, the large and small fabric pieces are sewn together to complete the sewing of the sleeve vent.

[0003] In related technologies, clamping mechanisms typically include a fixed clamping plate and a movable clamping plate. The movable clamping plate rotates relative to the fixed clamping plate to achieve clamping. Here, the rotation of the movable clamping plate is often driven by a cylinder, which results in high component costs. Utility Model Content

[0004] Therefore, it is necessary to provide a clamping mechanism and a sleeve fork machine to solve the problem of high cost of clamping cut pieces in existing sleeve fork machines.

[0005] This application provides a clamping mechanism for use on a sleeve clamping machine. The clamping mechanism includes a fixed base, a movable base, a rotating shaft, a fixed clamping plate, a movable clamping plate, and a pushing member. The fixed clamping plate is connected to the fixed base, and the movable clamping plate is connected to the movable base. The rotating shaft passes through and connects the fixed base and the movable base, allowing the movable base to rotate relative to the fixed base. A ventilation cavity is provided in the fixed base, and the pushing member is movably installed in the ventilation cavity. The pushing member and the movable clamping plate are located on opposite sides of the rotating shaft. The pushing member can extend out of the ventilation cavity in response to external force and apply force to the movable base, causing the movable base to rotate relative to the fixed base around the rotating shaft and drive the movable clamping plate to rotate towards the fixed clamping plate.

[0006] In one embodiment, the clamping mechanism further includes a seal installed between the outer wall of the pusher and the inner wall of the venting cavity.

[0007] In one embodiment, the outer wall of the pusher is recessed to form a sealing groove, and the seal is installed in the sealing groove and abuts against the inner wall of the venting cavity.

[0008] In one embodiment, the clamping mechanism further includes an air pipe connector connected to the fixed base and communicating with the ventilation cavity.

[0009] In one embodiment, the clamping mechanism further includes a reset member, the two ends of which are respectively connected to the fixed seat and the movable seat; when the movable seat drives the movable clamping plate to rotate toward the fixed clamping plate, the reset member can apply force to the movable seat so that the movable seat has a tendency to drive the movable clamping plate to rotate and reset in a direction away from the fixed clamping plate.

[0010] In one embodiment, the movable seat has a U-shaped groove, which is fitted around a portion of the outer periphery of the fixed seat; wherein the rotating shaft passes through and connects the opposite side walls of the fixed seat and the U-shaped groove.

[0011] In one embodiment, the clamping mechanism further includes a limiting member, which is arranged at an angle to the rotating shaft, and the limiting member passes through the movable seat and engages with the rotating shaft to limit the rotation of the movable seat relative to the rotating shaft.

[0012] In one embodiment, a limiting surface is formed on the rotating shaft. The limiting surface is planar, and the end of the limiting member abuts against the limiting surface.

[0013] In one embodiment, the end of the fixed clamp away from the fixed base and the end of the movable clamp away from the movable base are both arranged in a sword-head shape; or, the end of the fixed clamp away from the fixed base and the end of the movable clamp away from the movable base are arranged in a square-head shape.

[0014] This application also provides a sleeve fork machine for processing sleeve forks, wherein the sleeve fork is formed by sewing together small and large pieces of fabric, and the small pieces of fabric are folded on the sleeve fork machine to form a first shape area and a second shape area, the first shape area forming the front of the sleeve fork and the second shape area forming the back of the sleeve fork; the sleeve fork machine includes a lifting assembly, a flipping mechanism, and a clamping mechanism as described in any of the above embodiments, wherein there are two clamping mechanisms, which are respectively defined as a first clamping mechanism and a second clamping mechanism, and the sleeve fork machine is provided with a processing table, wherein the first clamping mechanism and the second clamping mechanism are both partially located above the processing table; the first clamping mechanism is used to clamp the first shape area of ​​the small pieces of fabric, and the second clamping mechanism is used to clamp the second shape area of ​​the small pieces of fabric; the flipping mechanism is connected to the first clamping mechanism and can drive the first clamping mechanism to flip upward toward the second clamping mechanism; the lifting assembly is used to drive the flipping mechanism, the first clamping mechanism, and the second clamping mechanism to move relative to the processing table along the height direction of the sleeve fork machine.

[0015] Compared with the prior art, the clamping mechanism and sleeve clamping machine provided in this application, by opening a ventilation cavity in the fixed seat and installing a pusher in the ventilation cavity, only needs to change the air pressure in the ventilation cavity when clamping is required. The pusher can then move outward under the action of air pressure and abut against the end of the movable seat away from the movable clamping plate. Since the pusher and the movable clamping plate are located on opposite sides of the rotation axis, when the pusher pushes the end of the movable seat away from the movable clamping plate to move away from the fixed seat, the end of the movable seat connected to the movable clamping plate will move towards the fixed seat. This allows the movable seat to drive the movable clamping plate to rotate towards the fixed clamping plate. The entire adjustment method is simple, low in cost, and can achieve a stable clamping function. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application or the conventional technology, the drawings used in the description of the embodiments or the conventional technology will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 A schematic diagram of the structure of a sleeve fork machine according to an embodiment of this application;

[0018] Figure 2 A partial structural schematic diagram of a sleeve-opening machine according to an embodiment of this application;

[0019] Figure 3 A schematic diagram of the clamping mechanism according to an embodiment of this application;

[0020] Figure 4 An exploded view of a clamping mechanism according to an embodiment provided in this application;

[0021] Figure 5 A cross-sectional view of a partial structure of a clamping mechanism according to an embodiment provided in this application;

[0022] Figure 6 A cross-sectional view of the limiting member and the rotating shaft in one embodiment of this application.

[0023] The symbols in the diagram represent the following meanings:

[0024] 100. Sleeve fork machine; 10. Workbench; 20. Folding assembly; 201. Folding surface; 21. Folding base; 22. Baffle; 23. Flipping mechanism; 24. Clamping mechanism; 24a. First clamping mechanism; 24b. Second clamping mechanism; 241. Fixed base; 2411. Ventilation chamber; 242. Movable base; 2421. U-shaped groove; 243. Fixed clamping plate; 244. Movable clamping plate; 245. Rotating shaft; 2451. Limiting surface; 246. Pushing component; 2461. Sealing groove; 2462. Sealing component; 247. Air pipe connector; 248. Reset component; 249. Limiting component; 30. Suction assembly; 301. Suction surface; 40. Lifting assembly; 41. Lifting base; 42. Lifting drive component; 43. Slide rail; 44. Slide groove; 200. Small fabric piece. Detailed Implementation

[0025] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0026] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on the other component or there may be an intermediate component. When a component is considered to be "connected to" another component, it can be directly connected to the other component or there may be an intermediate component present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application's specification are for illustrative purposes only and do not represent the only possible implementation.

[0027] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0028] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature and the second feature are in indirect contact through an intermediate medium. Furthermore, "above," "over," and "on top" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0029] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and / or" as used in this application includes any and all combinations of one or more of the associated listed items.

[0030] Currently, the sewing of sleeve vents typically involves folding the corners of small fabric pieces first. Taking a sword-shaped sleeve vent as an example, part of the small fabric piece is folded to form the sword-shaped front of the vent, while another part is folded to form the shape of the back of the vent. In the traditional sword-shaped sleeve vent manufacturing process, a clamping mechanism holds the portion of the small fabric piece that forms the back of the vent and folds it upwards towards the sword-shaped part. Then, a large fabric piece is placed on top of the small fabric piece, with part of the large fabric piece clamped onto the small fabric piece. Finally, the large and small fabric pieces are sewn together to complete the sewing of the sleeve vent.

[0031] In related technologies, clamping mechanisms typically include a fixed clamping plate and a movable clamping plate. The movable clamping plate rotates relative to the fixed clamping plate to achieve clamping. Here, the rotation of the movable clamping plate is often driven by a cylinder, which results in high component costs.

[0032] Please see Figures 1-6 To address the issue of high costs associated with clamping cut pieces in existing sleeve folding machines, this application provides a clamping mechanism 24, which is applied to the sleeve folding machine 100 to clamp and fold small cut pieces 200.

[0033] Please see Figures 3-5The clamping mechanism 24 provided in this application includes a fixed base 241, a movable base 242, a rotating shaft 245, a fixed clamping plate 243, a movable clamping plate 244, and a pushing member 246. The fixed clamping plate 243 is connected to the fixed base 241, and the movable clamping plate 244 is connected to the movable base 242. The rotating shaft 245 passes through and connects the fixed base 241 and the movable base 242, so that the movable base 242 can rotate relative to the fixed base 241. A venting cavity 2411 is provided in the fixed base 241, and the pushing member 246 is movably installed in the venting cavity 2411. The pushing member 246 and the movable clamping plate 244 are located on opposite sides of the rotating shaft 245. The pushing member 246 can extend out of the venting cavity 2411 in response to external force and apply force to the movable base 242, so that the movable base 242 can rotate relative to the fixed base 241 around the rotating shaft 245, and drive the movable clamping plate 244 to rotate towards the fixed clamping plate 243.

[0034] It is understood that this application, by opening a venting cavity 2411 in the fixed seat 241 and installing a pusher 246 in the venting cavity 2411, only needs to change the air pressure in the venting cavity 2411 when clamping is required. The pusher 246 can then move outward under the action of air pressure and abut against the end of the movable seat 242 away from the movable clamping plate 244. Since the pusher 246 and the movable clamping plate 244 are located on opposite sides of the rotating shaft 245, when the pusher 246 pushes the end of the movable seat 242 away from the movable clamping plate 244 in the direction away from the fixed seat 241, the end of the movable seat 242 connected to the movable clamping plate 244 will move in the direction closer to the fixed seat 241, so that the movable seat 242 can drive the movable clamping plate 244 to rotate in the direction of the fixed clamping plate 243. The whole adjustment method is simple, low in cost, and can achieve a stable clamping function.

[0035] To ensure the airtightness of the venting chamber 2411, in one embodiment, such as Figure 5 As shown, the clamping mechanism 24 also includes a seal 2462, which is installed between the outer wall of the pusher 246 and the inner wall of the venting chamber 2411. This prevents gas leakage between the pusher 246 and the inner wall of the venting chamber 2411, ensuring reliable movement of the pusher 246.

[0036] Optionally, the outer wall of the pusher 246 is recessed to form a sealing groove 2461, and the seal 2462 is installed in the sealing groove 2461 and abuts against the inner wall of the vent chamber 2411. This facilitates the installation of the seal 2462 and improves the reliability of its installation. Here, the seal 2462 can be an O-ring, which has a simple structure and can achieve circumferential sealing.

[0037] In other embodiments, the seal 2462 may also be installed in the groove formed on the inner wall of the venting cavity 2411. The specific installation can be reasonably set according to actual needs, as long as it can achieve the same sealing effect.

[0038] In one embodiment, such as Figure 3 and Figure 4 As shown, the clamping mechanism 24 also includes an air pipe connector 247, which is connected to the fixed base 241 and communicates with the ventilation chamber 2411. The air pipe connector 247 facilitates the connection between the ventilation chamber 2411 and the external air pipe, thereby improving the connection efficiency, reducing the connection difficulty, and ensuring the airtightness of the ventilation chamber 2411.

[0039] After the clamping mechanism 24 completes one clamping cycle, the movable clamping plate 244 needs to rotate away from the fixed clamping plate 243 again to facilitate the next clamping. Therefore, to achieve the rotational reset of the movable clamping plate 244, in one embodiment, the clamping mechanism 24 further includes a reset member 248, with its two ends connected to the fixed seat 241 and the movable seat 242, respectively. When the movable seat 242 drives the movable clamping plate 244 to rotate closer to the fixed clamping plate 243, the reset member 248 can apply force to the movable seat 242, causing the movable seat 242 to tend to drive the movable clamping plate 244 to rotate and reset away from the fixed clamping plate 243. As is easy to understand, the position where the reset component 248 is connected to the movable seat 242 is close to the movable clamping plate 244. Therefore, the principle is similar to that of the push component 246 pushing the movable seat 242 to rotate. When it is necessary to reset the movable clamping plate 244, the gas supply to the venting chamber 2411 can be stopped first. At this time, the force exerted by the push component 246 on the movable seat 242 will be less than the force exerted by the reset component 248 on the movable seat 242, so that the movable seat 242 can drive the movable clamping plate 244 to rotate away from the fixed clamping plate 243, thereby achieving reset.

[0040] Specifically, in this embodiment, the reset member 248 is set as a spring. Of course, in other embodiments, the reset member 248 may also adopt a magnet or other structure, which is not limited here.

[0041] In one embodiment, such as Figure 3 and Figure 4 As shown, the movable seat 242 has a U-shaped groove 2421, which fits around a portion of the outer periphery of the fixed seat 241. The rotating shaft 245 passes through and connects the opposite side walls of the fixed seat 241 and the U-shaped groove 2421. This increases the contact area between the movable seat 242 and the fixed seat 241, making their connection more stable and effectively improving the rotational reliability of the movable seat 242.

[0042] Furthermore, to improve the stability of the connection between the movable seat 242 and the rotating shaft 245, in one embodiment, the clamping mechanism 24 further includes a limiting member 249. The limiting member 249 is set at an angle to the rotating shaft 245, and the limiting member 249 passes through the movable seat 242 and engages with the rotating shaft 245 to prevent the movable seat 242 from rotating relative to the rotating shaft 245. This ensures that the movable seat 242 can rotate synchronously with the rotating shaft 245 relative to the fixed seat 241, and the connection is simple and convenient for subsequent maintenance.

[0043] Specifically, such as Figure 6 As shown, a limiting surface 2451 is formed on the rotating shaft 245. The limiting surface 2451 is a plane, and the end of the limiting member 249 abuts against the limiting surface 2451. In this way, by limiting the rotation of the rotating shaft 245 relative to the movable seat 242, the rotation of the rotating shaft 245 can be prevented. The overall structure is simple, easy to process, and easy to fit.

[0044] Since the small cut piece 200 can ultimately be formed into a sword-head sleeve gusset or a square-head sleeve gusset according to processing needs, in order to facilitate the clamping mechanism 24, such as Figure 3 and Figure 4 As shown, the end of the fixed clamp 243 away from the fixed base 241 and the end of the movable clamp 244 away from the movable base 242 can both be arranged in the shape of a sword head.

[0045] Of course, in other embodiments, the end of the fixed clamp 243 away from the fixed seat 241 and the end of the movable clamp 244 away from the movable seat 242 may both be square-shaped.

[0046] Please see Figure 1 and Figure 2 This application also provides a sleeve fork machine 100, which includes a clamping mechanism 24 of any of the above embodiments. Here, there are two clamping mechanisms 24, which are respectively defined as a first clamping mechanism 24a and a second clamping mechanism 24b. The sleeve fork machine 100 is provided with a processing table, and both the first clamping mechanism 24a and the second clamping mechanism 24b are partially located above the processing table.

[0047] Specifically, the sleeve fork machine 100 is used for processing the sleeve fork, which is formed by sewing together a small piece of fabric 200 and a large piece of fabric. The small piece of fabric 200 is folded on the sleeve fork machine 100 to form a first shape area and a second shape area. The first shape area forms the front of the sleeve fork, and the second shape area forms the back of the sleeve fork. A first clamping mechanism 24a is used to clamp the first shape area of ​​the small piece of fabric 200, and a second clamping mechanism 24b is used to clamp the second shape area of ​​the small piece of fabric 200. Here, the first clamping mechanism 24a can set the ends of the fixed clamping plate 243 and the movable clamping plate 244 to a suitable sword-head shape or square head shape according to the final shape of the sleeve fork. The fixed clamping plate 243 and the movable clamping plate 244 in the second clamping mechanism 24b can be reasonably set according to actual needs.

[0048] It should be noted that the front of the sleeve vent refers to the outside of the garment that can be directly observed when the sleeve vent is on the garment, while the back of the sleeve vent refers to the inside of the garment.

[0049] Currently, traditional sewing methods leave the back of the sleeve gusset facing upwards. If the entire fabric piece (size 200) isn't turned over so the front of the gusset is facing upwards, reverse stitching will occur during sewing. This means that neater stitches will appear on the back of the sleeve gusset, while the stitching on the front, which needs to be visible, will be messy, prone to bird's nests and loose threads, failing to meet customer requirements. However, turning the fabric pieces over requires manual or machine operation, significantly impacting processing speed and further increasing overall costs.

[0050] Based on this, the sleeve folding machine 100 provided in this application also includes a worktable 10, a folding assembly 20, a suction assembly 30, and a lifting assembly 40. For ease of explanation, this application defines the vertical direction as the height direction of the sleeve folding machine 100; the front-back direction as the width direction of the sleeve folding machine 100, and defines the side facing the operator as the front side and the side facing away from the operator as the back side; the left-right direction as the length direction of the sleeve folding machine 100, and defines the side closer to the operator's left hand as the left side and the side closer to the operator's right hand as the right side.

[0051] Specifically, the material suction assembly 30 is fixedly installed on the workbench 10, and the material suction assembly 30 is provided with a material suction surface 301. The material folding assembly 20 includes a first clamping mechanism 24a, a second clamping mechanism 24b, a flipping mechanism 23, a material folding base 21, and two baffles 22. The two baffles 22 are spaced apart in the left-right direction and are both connected to the material folding base 21. The first clamping mechanism 24a is connected to the flipping mechanism 23, and the second clamping mechanism 24b is connected to the material folding base 21. The lifting assembly 40 and the suction assembly 30 are distributed vertically. The lifting assembly 40 includes a lifting base 41 and a lifting drive 42. The lifting base 41 is connected to the folding base 21 and the tilting mechanism 23 via a slide rail 43 and a chute 44. Here, the slide rail 43 is installed vertically within the chute 44 and can slide in the chute 44 in the front-back direction via a cylinder or other drive component, thereby enabling the fixed clamp 243 and the movable clamp 244 to extend and retract in the front-back direction. The lifting drive 42 is connected to the lifting base 41, and the output end of the lifting drive 42 is connected to the suction assembly 30, so that the suction assembly 30 can be lifted or lowered relative to the lifting base 41 in the height direction.

[0052] In its initial state, the fixed clamping plate 243 on the first clamping mechanism 24a and the second clamping mechanism 24b is positioned between two baffles 22, and both the fixed clamping plate 243 and the baffles 22 are positioned above the suction surface 301. That is, the suction surface 301 forms the aforementioned processing table, and the surface of the fixed clamping plate 243 forms a folding surface 201. When the sleeve folding machine 100 is in folding operation, it first places the small cut piece 200 on the folding surface 201, and folds the corners of the small cut piece 200 manually or with the help of other parts, thereby forming two areas, a first shape area and a second shape area, on the small cut piece 200. Then, the movable clamping plate 244 on the first clamping mechanism 24a and the second clamping mechanism 24b rotates to clamp the corresponding part of the small cut piece 200, preventing the corners of the small cut piece 200 from falling off. Afterwards, the flipping mechanism 23 drives the first clamping mechanism 24a to rotate upwards towards the second clamping mechanism 24b by a preset angle. Then, the lifting drive 42 applies force to the suction assembly 30 to reduce the distance between the lifting base 41 and the suction assembly 30, thereby moving the lifting base 41 upwards. This simultaneously drives the folding assembly 20 upwards, creating a height difference between the folding surface 201 formed by the fixed clamping plate 243 and the suction surface 301. At this time, a large piece of fabric is placed in the fabric, with one side of the notch of the large piece of fabric positioned below the fixed clamping plate 243 of the second clamping mechanism 24b, and the other side of the notch positioned between the first shape area and the second shape area on the small piece of fabric 200. Then, the lifting drive 42 is activated again, causing the folding assembly 20 to return to its original position. One side of the large cut piece notch is then clamped between the fixed clamping plate 243 of the second clamping mechanism 24b and the suction surface 301. At this time, the flipping mechanism 23 continues to drive the first clamping mechanism 24a to rotate towards the second clamping mechanism 24b, so that the moving clamping plate 244 of the first clamping mechanism 24a cooperates with the moving clamping plate 244 of the second clamping mechanism 24b to clamp the other side of the large cut piece notch. Afterward, the pressure plate mechanism presses down on the large and small cut pieces 200, and causes the folding assembly 20 to extend in the front-to-back direction. Finally, the pressure plate mechanism returns to its original position to facilitate subsequent sewing. In this way, the sleeve gusset can be positioned with the sword tip facing upward, and a positive stitch can be formed during subsequent sewing, thereby optimizing the stitch effect of the sleeve gusset.

[0053] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0054] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the scope of protection of this application. Therefore, the patent protection scope of this application should be determined by the appended claims.

Claims

1. A clamping mechanism applied to a sleeve clamping machine, characterized in that, The clamping mechanism includes a fixed base (241), a movable base (242), a rotating shaft (245), a fixed clamping plate (243), a movable clamping plate (244), and a pushing member (246). The fixed clamping plate (243) is connected to the fixed base (241), and the movable clamping plate (244) is connected to the movable base (242). The rotating shaft (245) passes through and connects the fixed base (241) and the movable base (242) so that the movable base (242) can rotate relative to the fixed base (241). The fixed base (241) has a ventilation cavity (2411) inside, the pusher (246) is movably installed in the ventilation cavity (2411), and the pusher (246) and the movable clamp (244) are respectively located on opposite sides of the rotating shaft (245); The pusher (246) can extend out of the ventilation cavity (2411) in response to external force and apply force to the movable seat (242) so that the movable seat (242) can rotate relative to the fixed seat (241) around the rotation axis (245) and drive the movable clamp (244) to rotate toward the fixed clamp (243).

2. The clamping mechanism according to claim 1, characterized in that, The clamping mechanism further includes a seal (2462) installed between the outer wall of the pusher (246) and the inner wall of the vent (2411).

3. The clamping mechanism according to claim 2, characterized in that, The outer wall of the pusher (246) is recessed to form a sealing groove (2461), and the sealing element (2462) is installed in the sealing groove (2461) and abuts against the inner wall of the venting cavity (2411).

4. The clamping mechanism according to claim 1, characterized in that, The clamping mechanism also includes an air pipe connector (247), which is connected to the fixed base (241) and communicates with the ventilation chamber (2411).

5. The clamping mechanism according to claim 1, characterized in that, The clamping mechanism further includes a reset member (248), the two ends of which are respectively connected to the fixed seat (241) and the movable seat (242). When the movable seat (242) drives the movable clamp (244) to rotate toward the fixed clamp (243), the reset member (248) can apply force to the movable seat (242) so that the movable seat (242) has a tendency to drive the movable clamp (244) to rotate and reset in a direction away from the fixed clamp (243).

6. The clamping mechanism according to claim 1, characterized in that, The movable seat (242) is provided with a U-shaped groove (2421), and the U-shaped groove (2421) is fitted onto a portion of the outer periphery of the fixed seat (241); The rotating shaft (245) passes through and connects the opposite side walls of the fixed seat (241) and the U-shaped groove (2421).

7. The clamping mechanism according to claim 1, characterized in that, The clamping mechanism further includes a limiting member (249), which is set at an angle to the rotating shaft (245). The limiting member (249) passes through the movable seat (242) and engages with the rotating shaft (245) to prevent the movable seat (242) from rotating relative to the rotating shaft (245).

8. The clamping mechanism according to claim 7, characterized in that, A limiting surface (2451) is formed on the rotating shaft (245). The limiting surface (2451) is a plane, and the end of the limiting member (249) abuts against the limiting surface (2451).

9. The clamping mechanism according to claim 1, characterized in that, The fixed clamp (243) at one end away from the fixed seat (241) and the movable clamp (244) at one end away from the movable seat (242) are both arranged in the shape of a sword head; Alternatively, the end of the fixed clamp (243) away from the fixed seat (241) and the end of the movable clamp (244) away from the movable seat (242) are arranged in a square shape.

10. A sleeve fork machine for processing sleeve forks, the sleeve forks being formed by sewing together small pieces (200) and large pieces, wherein the small pieces (200) are folded on the sleeve fork machine to form a first shape area and a second shape area, the first shape area forming the front of the sleeve fork and the second shape area forming the back of the sleeve fork; Its features are, The sleeve fork machine includes a lifting assembly (40), a flipping mechanism (23), and a clamping mechanism as described in any one of claims 1 to 9. The number of clamping mechanisms is two, and they are defined as a first clamping mechanism (24a) and a second clamping mechanism (24b), respectively. The sleeve fork machine is provided with a processing table, and the first clamping mechanism (24a) and the second clamping mechanism (24b) are both partially located above the processing table. The first clamping mechanism (24a) is used to clamp the first shape area of ​​the small piece of fabric (200), the second clamping mechanism (24b) is used to clamp the second shape area of ​​the small piece of fabric (200), and the flipping mechanism (23) is connected to the first clamping mechanism (24a) and can drive the first clamping mechanism (24a) to flip upward toward the second clamping mechanism (24b); The lifting assembly (40) is used to drive the flipping mechanism (23), the first clamping mechanism (24a) and the second clamping mechanism (24b) to move relative to the processing table along the height direction of the sleeve fork machine.

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