Machine frame type metal product assembling mechanism

By introducing components such as limiting grooves, welding grooves, electric push rods, and synchronous motors into the assembly mechanism of frame-type metal products, the problem of insufficient operating space during welding is solved, and efficient welding and assembly of frames are achieved.

CN120940924APending Publication Date: 2025-11-14WUXI SHENGYUN EQUIP TECH CO LTD
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Patent Information

Application Number
CN202511354746.7
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-09-22
Publication Date
2025-11-14

AI Technical Summary

Technical Problem

Existing assembly mechanisms for frame-type metal products lack manual operation space during the welding process, resulting in inconvenience in welding, especially inefficient assembly of double-layer frames.

Method used

An assembly mechanism for frame-type metal products was designed, comprising an assembly table, an adjustment mechanism, a limiting mechanism, and a pushing mechanism. By setting components such as limiting grooves, welding grooves, electric push rods, and synchronous motors, the mechanism enables the reservation of manual operation space during the welding process and the convenient adjustment of the assembly rods.

Benefits of technology

It improves the convenience of welding operations and assembly efficiency, ensures sufficient operating space during the welding process, allows for flexible adjustment of assembly height and position, and improves the overall welding quality and efficiency of the frame.

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Abstract

The invention relates to the technical field of rack assembly, and discloses a rack type metal product assembly mechanism which comprises an assembly table, and two first limiting grooves, three second limiting grooves and a welding groove are formed in the top of the assembly table; an adjusting mechanism; through the pushing mechanism and the adjusting mechanism, a first welding groove and a second welding groove are formed in the assembly table, so that an assembly rod in the assembly table can be subjected to primary welding connection conveniently, then a third electric push rod operates to drive a lifting plate to move, and the assembly rod subjected to primary welding connection is pushed to move; the assembly rods are separated from the first limiting groove and the second limiting groove in the assembly table, a large manual operation space is formed in the welding connection process, the supporting frame can be used for supporting one of the assembly rods at the top, and the connecting frame and the limiting plate can be used for supporting the other assembly rods at the top of the rack; in the welding connection process, welding is more convenient through the top reserved space, welding operation is more convenient, and then the assembly efficiency is higher.
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Description

Technical Field

[0001] This invention relates to the field of frame assembly technology, specifically to an assembly mechanism for frame-type metal products. Background Technology

[0002] A frame assembly mechanism is a systematic device or equipment combination used in the field of mechanical manufacturing to position, connect, and fix the various components of a frame (such as columns, beams, connecting plates, guide rails, etc.) according to design requirements, ultimately forming a complete frame structure. It plays a crucial role in the manufacturing process of various types of machinery (such as machine tools, automated production lines, construction machinery, printing equipment, etc.), directly affecting the frame's precision, strength, and stability.

[0003] Existing assembly mechanisms for frame-type metal products typically do not provide sufficient space for manual operation when welding and connecting positioned frame components during actual use. This makes it difficult to make adjustments during the welding process, and the assembly of double-layer frames can lead to extremely inconvenient welding procedures, thus significantly impacting assembly efficiency. Summary of the Invention

[0004] The purpose of this invention is to provide an assembly mechanism for frame-type metal products to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: An assembly mechanism for frame-type metal products, comprising: An assembly table, the top of which is provided with two first limiting grooves, three second limiting grooves, and a welding groove; An adjustment mechanism is installed on the top of the assembly table, and the adjustment mechanism can adjust the assembly height by adjusting the height of the connecting frame; A limiting mechanism is provided on the top of the assembly table, and the limiting mechanism can be used to support the inclined frame through a sliding frame; A pushing mechanism is installed inside the assembly table. The pushing mechanism facilitates welding assembly by adjusting the height of the assembly frame inside the assembly table.

[0006] Optionally, the pushing mechanism includes a third electric push rod, a lifting plate, and a magnetic suction component. The third electric push rod is fixedly installed inside the assembly table, the lifting plate is fixedly installed at the output end of the third electric push rod, the magnetic suction component is fixedly installed on the top of the lifting plate, and the lifting plate is located inside the first limiting groove.

[0007] Optionally, a support member is movably connected to one side of the inner wall of the second limiting groove via a first spring, and a protrusion is fixedly installed on the other side of the inner wall of the second limiting groove.

[0008] Optionally, the side wall of the assembly table is provided with a second welding groove, which is connected to the first limiting groove, and a plurality of first welding grooves are provided at the connection between the first limiting groove and the second limiting groove.

[0009] Optionally, an installation plate is fixedly installed inside the assembly table, a first electric push rod is fixedly installed on one side of the installation plate, a clamping plate is fixedly installed at the output end of the first electric push rod, and an anti-slip component is fixedly installed inside the clamping plate.

[0010] Optionally, a mounting bracket is fixedly installed on one side of the assembly table, and a second electric push rod is fixedly installed inside the mounting bracket. A top plate is fixedly installed at the output end of the second electric push rod, and the top plate is located in one of the second limiting grooves.

[0011] Optionally, a second spring is fixedly installed inside the top plate, and a push plate is fixedly installed at one end of the second spring. The push plate is movably connected inside the top plate through the second spring, and one side of the push plate is an arc surface.

[0012] Optionally, the adjustment mechanism includes a mounting rod, a threaded rod, a synchronous motor, a limiting frame, a support frame, an adjusting frame, and a limiting plate. The mounting rod is fixedly mounted on the top of the assembly table, the synchronous motor is fixedly mounted on the top of the mounting rod, the threaded rod is fixedly mounted on the output end of the synchronous motor, and the threaded rod is rotatably connected inside the mounting rod via the synchronous motor. A sliding plate is slidably connected inside the mounting rod, and the sliding plate has a threaded hole that matches the threaded rod. The limiting frame is fixedly mounted on one side of the sliding plate, the connecting frame is fixedly mounted on one side of the limiting frame, the support frame is fixedly mounted on one side of the connecting frame, the adjusting frame is slidably connected inside the connecting frame, and the limiting plate is fixedly mounted on the top of the adjusting frame.

[0013] Optionally, the limiting frame has a groove inside, and a clamping component is fixedly installed on the inner wall of the groove. The clamping component is an arc-shaped component.

[0014] Optionally, the limiting mechanism includes a fixed frame, a mounting shaft, and a baffle. The fixed frame is fixedly installed on the top of the assembly table, the mounting shaft is fixedly installed inside the fixed frame, the sliding frame has a through hole that matches the mounting shaft, the sliding frame is slidably connected to the side wall of the mounting shaft through the through hole, and the baffle is fixedly installed on one side of the sliding frame.

[0015] The present invention has at least the following beneficial effects: (1) This solution sets up a pushing mechanism and an adjustment mechanism. The first welding groove and the second welding groove are opened in the assembly table to facilitate the initial welding connection of the assembly rod in the assembly table. Then, the third electric push rod drives the lifting plate to move, pushing the initially welded assembly rod to move and disengage it from the first and second limiting grooves in the assembly table. The initially connected assembly rod is easy to fully weld. There is a large manual operation space during the welding connection process. The support frame can be used to support one of the top assembly rods. The connecting frame and the limiting plate can be used to support the remaining assembly rods on the top of the frame. The reserved space at the top makes welding more convenient and the welding operation more convenient, thereby making the assembly efficiency higher. (2) This solution can control the rotation of the threaded rod by setting a synchronous motor. The rotation of the threaded rod can drive the sliding plate to move inside the mounting rod. The movement of the sliding plate can drive the limit frame and the limit frame mounted on one side to move, thereby adjusting the height of the connecting frame and thus adjusting the assembly height of the top frame. (3) This solution can be used to drive the clamping plate to move by setting the first electric push rod. The clamping plate can be used to clamp and fix the assembly rod in the first limiting groove by moving. The assembly rod can be prevented from sliding during the clamping process by setting anti-slip parts. (4) This solution can use the first spring to support the support component, so that the support component can cooperate with the protrusion to clamp the assembly rod in the second limiting groove. The second electric push rod can be used to control the height of the top plate. The top plate can be raised to limit the assembly rod in one of the second limiting grooves. The second spring can be used to push the push plate to support the assembly rod in one of the second limiting grooves. By setting the second spring, the position of the assembly rod in the second limiting groove can be adjusted by simply turning it during the welding process. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic cross-sectional view of the limiting frame of the present invention; Figure 3 This is a schematic diagram of the limiting mechanism structure of the present invention; Figure 4 This is a partial cross-sectional view of the assembly table of the present invention; Figure 5 This is a cross-sectional view of the mounting bracket of the present invention; Figure 6 This is a schematic diagram of the mounting plate structure of the present invention; Figure 7 This is a cross-sectional view of the assembly table of the present invention; Figure 8 This is a schematic diagram of the frame structure of the present invention.

[0017] The attached diagram lists the components represented by each number as follows: 1. Assembly table; 11. First limiting groove; 12. Second limiting groove; 13. Protrusion; 14. First spring; 15. Support component; 2. First welding groove; 21. Second welding groove; 3. Mounting rod; 31. Threaded rod; 32. Synchronous motor; 33. Limiting frame; 34. Connecting frame; 35. Support frame; 36. Adjusting frame; 37. Limiting plate; 38. Sliding plate; 39. Threaded hole; 310. Groove; 311. Clamping component; 4. Clamping plate; 41. Mounting plate; 42. First electric push rod; 43. Anti-slip component; 5. Mounting frame; 51. Top plate; 52. Second spring; 53. Push plate; 54. Second electric push rod; 6. Magnetic component; 61. Third electric push rod; 62. Lifting plate; 7. Fixing frame; 71. Mounting shaft; 72. Sliding frame; 73. Through hole; 74. Baffle; 8. Frame. Detailed Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] Please see Figures 1-8 This invention provides an assembly mechanism for frame-type metal products, comprising: Assembly table 1, with two first limiting grooves 11 and three second limiting grooves 12 on the top of the assembly table 1; An adjustment mechanism is installed on the top of the assembly table 1. The adjustment mechanism can adjust the assembly height by adjusting the height of the connecting bracket 34. A limiting mechanism is installed on the top of the assembly table 1. The limiting mechanism can be used to support the inclined frame through the sliding frame 72. The pushing mechanism is located inside the assembly table 1. The pushing mechanism facilitates welding assembly by adjusting the height of the assembly frame inside the assembly table 1.

[0020] In some embodiments, see Figure 1 , Figure 7The pushing mechanism includes a third electric push rod 61, a lifting plate 62, and a magnetic suction component 6. The third electric push rod 61 is fixedly installed inside the assembly table 1, the lifting plate 62 is fixedly installed at the output end of the third electric push rod 61, and the magnetic suction component 6 is fixedly installed on the top of the lifting plate 62. The lifting plate 62 is located inside the first limiting groove 11. A second welding groove 21 is provided on the side wall of the assembly table 1. The second welding groove 21 is connected to the first limiting groove 11. Several first welding grooves 2 are provided at the connection between the first limiting groove 11 and the second limiting groove 12. The welding groove includes the first welding groove 2 and the second welding groove 21, such as... Figure 8 The image shows the assembled frame 8. The first limiting groove 11 and the second limiting groove 12 on the top of the assembly table 1 can be used to place the assembly rods needed during the assembly process of the frame 8. The first welding groove 2 and the second welding groove 21 in the assembly table 1 can facilitate the preliminary welding connection of the assembly rods in the assembly table 1. Then, the third electric push rod 61 drives the lifting plate 62 to move, pushing the preliminarily welded assembly rod to move away from the first limiting groove 11 and the second limiting groove 12 in the assembly table 1. The preliminarily connected assembly rod is easy to fully weld. There is a large manual operation space during the welding connection process, which makes the welding operation more convenient and thus improves the assembly efficiency.

[0021] In some embodiments, see Figure 1 , Figure 4 A support member 15 is movably connected to one side of the inner wall of the second limiting groove 12 via a first spring 14, and a protrusion 13 is fixedly installed on the other side of the inner wall of the second limiting groove 12. By setting the first spring 14, it can be used to support the support member 15, so that the support member 15 can cooperate with the protrusion 13 to clamp the assembly rod in the second limiting groove 12.

[0022] In some embodiments, see Figure 1 , Figure 5 An mounting plate 41 is fixedly installed inside the assembly table 1. A first electric push rod 42 is fixedly installed on one side of the mounting plate 41. A clamping plate 4 is fixedly installed at the output end of the first electric push rod 42. An anti-slip component 43 is fixedly installed inside the clamping plate 4. The first electric push rod 42 can be used to drive the clamping plate 4 to move. The movement of the clamping plate 4 can be used to clamp and fix the assembly rod in the first limiting groove 11. The anti-slip component 43 can prevent the assembly rod from sliding during the clamping process.

[0023] In some embodiments, see Figure 1 , Figure 5A mounting bracket 5 is fixedly installed on one side of the assembly table 1. A second electric push rod 54 is fixedly installed inside the mounting bracket 5. A top plate 51 is fixedly installed at the output end of the second electric push rod 54. The top plate 51 is located on one side of one of the second limiting grooves 12. A second spring 52 is fixedly installed inside the top plate 51. A push plate 53 is fixedly installed at one end of the second spring 52. The push plate 53 is movably connected to the top plate 51 through the second spring 52. One side of the push plate 53 is curved. The height of the top plate 51 can be controlled by setting the second electric push rod 54. The top plate 51 can be raised to limit the assembly rod in one of the second limiting grooves 12. The second spring 52 can be used to push the push plate 53 to support the assembly rod in one of the second limiting grooves 12. By setting the second spring 52, the position of the assembly rod in the second limiting groove 12 can be moved by simply turning it when adjustment is needed during the welding process.

[0024] In some embodiments, see Figure 1 , Figure 2 The adjustment mechanism includes a mounting rod 3, a threaded rod 31, a synchronous motor 32, a limiting frame 33, a support frame 35, an adjusting frame 36, and a limiting plate 37. The mounting rod 3 is fixedly mounted on the top of the assembly table 1. The synchronous motor 32 is fixedly mounted on the top of the mounting rod 3. The threaded rod 31 is fixedly mounted on the output end of the synchronous motor 32 and is rotatably connected to the inside of the mounting rod 3 via the synchronous motor 32. A sliding plate 38 is slidably connected inside the mounting rod 3. The sliding plate 38 has a threaded hole 39 that matches the threaded rod 31. The limiting frame 33 is fixedly mounted on one side of the sliding plate 38. A connecting frame 34 is fixedly mounted on one side of the limiting frame 33. The support frame 35 is fixedly mounted on one side of the connecting frame 34. The adjusting frame 36 is slidably connected inside the connecting frame 34. The limiting plate 37... Fixedly installed on the top of the adjusting frame 36, the threaded rod 31 can be rotated by a synchronous motor 32. The rotation of the threaded rod 31 can drive the sliding plate 38 to move inside the mounting rod 3. The movement of the sliding plate 38 can drive the limiting frame 33 and the connecting frame 34 on one side of the limiting frame 33 to move, thereby adjusting the height of the connecting frame 34, and thus adjusting the assembly height of the top frame. The adjusting frame 36 can be used to adjust the distance between the limiting plate 37 and the support frame 35, so as to adjust according to the specific spacing of the top frame of the machine frame 8. The support frame 35 can be used to support one of the top assembly rods, and the connecting frame 34 and the limiting plate 37 can be used to support the remaining assembly rods on the top of the machine frame 8.

[0025] In some embodiments, see Figure 1 , Figure 2The limiting frame 33 has a groove 310 inside, and a clamping member 311 is fixedly installed on the inner wall of the groove 310. The clamping member 311 is an arc-shaped part. By setting the arc-shaped clamping member 311 inside the limiting frame 33, the clamping member 311 can clamp the assembly rod inside the limiting frame 33 by deformation after the assembly rod is inserted into the limiting frame 33 during the assembly process. The clamping member 311 is a rubber part, and the limiting frame 33 is a C-shaped frame, which makes it easier to remove the frame from the assembly device after welding.

[0026] In some embodiments, see Figure 1 , Figure 3 The limiting mechanism includes a fixed frame 7, a mounting shaft 71, and a baffle 74. The fixed frame 7 is fixedly installed on the top of the assembly table 1, and the mounting shaft 71 is fixedly installed inside the fixed frame 7. The sliding frame 72 has a through hole 73 that matches the mounting shaft 71. The sliding frame 72 is slidably connected to the side wall of the mounting shaft 71 through the through hole 73. The baffle 74 is fixedly installed on one side of the sliding frame 72. When it is necessary to install the inclined support rod, the sliding frame 72 is moved to the top of the first limiting groove 11, thereby limiting the inclined support rod installed at the bottom. The baffle 74 can prevent the inclined frame from being misaligned with the assembly rod in the first limiting groove 11.

[0027] The workflow and principle of this invention are as follows: First, the vertical assembly rod required to form the frame 8 is inserted into the limiting frame 33. After insertion, the clamping member 311 can deform to clamp the assembly rod within the limiting frame 33, positioning its bottom at the connection point between the first limiting groove 11 and the second limiting groove 12 on one side of the assembly table 1. Then, the horizontally oriented assembly rod is inserted into the first limiting groove 11. The first electric push rod 42 drives the clamping plate 4 to move, which clamps and fixes the assembly rod within the first limiting groove 11. The anti-slip member 43 prevents the assembly rod from sliding during clamping. Finally, the bottom vertical... The assembly rod is inserted into the second limiting groove 12. Two of the assembly rods in the second limiting groove 12 can be supported by the first spring 14, allowing the support 15 to clamp the assembly rod in the second limiting groove 12 in conjunction with the protrusion 13. The assembly rod in the other second limiting groove 12 is controlled by the second electric push rod 54, which controls the height of the top plate 51. Raising the top plate 51 limits the position of the assembly rod in the other second limiting groove 12. The second spring 52 pushes the push plate 53 to support the assembly rod in the other second limiting groove 12. By setting the second spring 52, the position of the assembly rod in the second limiting groove 12 is controlled. When adjustments are needed during welding, the device can be moved simply by turning it. A synchronous motor 32 controls the rotation of the threaded rod 31, which in turn moves the sliding plate 38 within the mounting rod 3. The movement of the sliding plate 38 moves the limiting frame 33 and one side of the limiting frame 33 mounted on the connecting frame 34, thus adjusting the height of the connecting frame 34 and consequently the assembly height of the top frame. An adjusting bracket 36 can be used to adjust the distance between the limiting plate 37 and the support frame 35, allowing for adjustments based on the specific spacing of the top frame of the machine frame 8. The support frame 35 supports one of the top mounting rods. The connecting frame 34 and the limiting plate 37 can be used to support the remaining assembly rods on the top of the frame 8. During the welding connection process, the reserved space at the top makes welding more convenient. Then, the assembly rods are initially welded together by the second welding groove 21 opened on the side wall of the assembly table 1 and several first welding grooves 2 opened at the connection between the first limiting groove 11 and the second limiting groove 12. Then, the third electric push rod 61 drives the lifting plate 62 to move, pushing the initially welded assembly rod to move, so that it is separated from the first limiting groove 11 and the second limiting groove 12 in the assembly table 1, and the position of the assembly rod is adjusted so that the initially connected assembly rod can be fully welded together.

[0028] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0029] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An assembly mechanism for frame-type metal products, characterized in that, include: Assembly table (1), the top of which is provided with two first limiting grooves (11), three second limiting grooves (12) and a welding groove; An adjustment mechanism is installed on the top of the assembly table (1). The adjustment mechanism can adjust the assembly height by adjusting the height of the connecting frame (34). A limiting mechanism is provided on the top of the assembly table (1). The limiting mechanism can be used to support the inclined frame through a sliding frame (72). The pushing mechanism is located inside the assembly table (1). The pushing mechanism facilitates welding assembly by adjusting the height position of the assembly frame inside the assembly table (1).

2. The assembly mechanism for frame-type metal products according to claim 1, characterized in that: The pushing mechanism includes a third electric push rod (61), a lifting plate (62), and a magnetic suction component (6). The third electric push rod (61) is fixedly installed inside the assembly table (1). The lifting plate (62) is fixedly installed at the output end of the third electric push rod (61). The magnetic suction component (6) is fixedly installed on the top of the lifting plate (62). The lifting plate (62) is located inside the first limiting groove (11).

3. The assembly mechanism for frame-type metal products according to claim 1, characterized in that: A support member (15) is movably connected to one side of the inner wall of the second limiting groove (12) via a first spring (14), and a protrusion (13) is fixedly installed on the other side of the inner wall of the second limiting groove (12).

4. The assembly mechanism for frame-type metal products according to claim 1, characterized in that: The assembly table (1) has a second welding groove (21) on its side wall. The second welding groove (21) is connected to the first limiting groove (11). A plurality of first welding grooves (2) are provided at the connection between the first limiting groove (11) and the second limiting groove (12).

5. The assembly mechanism for frame-type metal products according to claim 1, characterized in that: An installation plate (41) is fixedly installed inside the assembly table (1). A first electric push rod (42) is fixedly installed on one side of the installation plate (41). A clamping plate (4) is fixedly installed at the output end of the first electric push rod (42). An anti-slip component (43) is fixedly installed inside the clamping plate (4).

6. The assembly mechanism for frame-type metal products according to claim 1, characterized in that: A mounting frame (5) is fixedly installed on one side of the assembly table (1). A second electric push rod (54) is fixedly installed inside the mounting frame (5). A top plate (51) is fixedly installed at the output end of the second electric push rod (54). The top plate (51) is located on one side of one of the second limiting grooves (12).

7. The assembly mechanism for frame-type metal products according to claim 6, characterized in that: A second spring (52) is fixedly installed inside the top plate (51). A push plate (53) is fixedly installed at one end of the second spring (52). The push plate (53) is movably connected inside the top plate (51) through the second spring (52). One side of the push plate (53) is an arc surface.

8. The assembly mechanism for frame-type metal products according to claim 1, characterized in that: The adjustment mechanism includes a mounting rod (3), a threaded rod (31), a synchronous motor (32), a limiting frame (33), a support frame (35), an adjusting frame (36), and a limiting plate (37). The mounting rod (3) is fixedly mounted on the top of the assembly table (1), the synchronous motor (32) is fixedly mounted on the top of the mounting rod (3), and the threaded rod (31) is fixedly mounted on the output end of the synchronous motor (32). The threaded rod (31) is rotatably connected inside the mounting rod (3) through the synchronous motor (32). (3) An internal sliding plate (38) is provided, and the sliding plate (38) has a threaded hole (39) that matches the threaded rod (31). The limiting frame (33) is fixedly installed on one side of the sliding plate (38), the connecting frame (34) is fixedly installed on one side of the limiting frame (33), the support frame (35) is fixedly installed on one side of the connecting frame (34), the adjusting frame (36) is slidably connected inside the connecting frame (34), and the limiting plate (37) is fixedly installed on the top of the adjusting frame (36).

9. The assembly mechanism for frame-type metal products according to claim 8, characterized in that: The limiting frame (33) has a groove (310) inside, and a clamping member (311) is fixedly installed on the inner wall of the groove (310). The clamping member (311) is an arc-shaped member.

10. The assembly mechanism for frame-type metal products according to claim 1, characterized in that: The limiting mechanism includes a fixed frame (7), a mounting shaft (71), and a baffle (74). The fixed frame (7) is fixedly installed on the top of the assembly table (1). The mounting shaft (71) is fixedly installed inside the fixed frame (7). The sliding frame (72) has a through hole (73) that matches the mounting shaft (71). The sliding frame (72) is slidably connected to the side wall of the mounting shaft (71) through the through hole (73). The baffle (74) is fixedly installed on one side of the sliding frame (72).