Quick splicing structure for assembling protective plates

Abstract

The invention provides a rapid splicing structure for protective plate assembly, and relates to the field of protective plate splicing, the rapid splicing structure comprises a main splicing frame and an auxiliary splicing frame which are clamped with each other, the left side of the front side wall of the main splicing frame is rotatably connected with a rotary adjusting shaft, and the rear side wall of the main splicing frame is slidably connected with a tightening piece; the right side of the rear side wall of the auxiliary splicing frame is rotationally connected with a rotary adjusting shaft, the front side wall of the auxiliary splicing frame is slidably connected with a tightening piece, the middle of the auxiliary splicing frame is rotationally connected with a locking rod, and a deflection button is hinged to the front end of the locking rod. The main splicing frame and the auxiliary splicing frame are accurately matched through multiple groups of sliding through grooves and sliding wedge blocks, inserting circular grooves and inserting circular blocks, and limiting clamping blocks and limiting clamping grooves, rapid positioning in the splicing process is achieved, the splicing adjustment time is greatly shortened, splicing vertical rods and splicing paired rods are matched with the inserting grooves, the inserting blocks and fixing bolts, and the splicing efficiency is improved. An efficient splicing system is constructed, and the problems of the protection plate splicing technology in the aspects of efficiency, stability and operation convenience are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of protective plate splicing, and in particular to a quick splicing structure for assembling protective plates. Background Art

[0002] In the construction sector, protective sheeting is widely used in building exterior walls, interior partitions, construction site safety fencing, and more. In the transportation industry, noise barriers on highways and railways, as well as the protective casings of various transportation facilities, all rely on protective sheeting, and their installation requires the use of a quick-jointing structure.

[0003] Based on the above, the existing quick splicing structure for assembling protective plates has the following shortcomings: Traditional splicing lacks a precise positioning mechanism, and the position of the panels is difficult to determine quickly during splicing, requiring repeated adjustments. When bolt connections are used, the process of drilling and installing bolts is cumbersome, which greatly prolongs the splicing time and results in low splicing efficiency. Existing splicing technology is not capable of coping with complex stress conditions, and the splicing parts are not stable enough. Due to the lack of effective reinforcement design, the protective panels are prone to loosening at the joints when impacted by external forces, and the risk of panels falling off is high. Existing splicing technology has poor adaptability to protective panels of different thicknesses, and it is difficult for operators to flexibly adjust the clamping force according to the thickness of the panels, resulting in shaking, displacement, and other problems in the installed panels. In addition, the locking and unlocking process of some splicing structures is complicated and relies on the assistance of multiple tools, which increases the difficulty of operation and reduces the convenience of operation. Summary of the Invention

[0004] The disclosed embodiments relate to a quick splicing structure for assembling protective plates, wherein a main splicing frame and a secondary splicing frame innovatively adopt multiple structures such as sliding through grooves and sliding wedges, plug-in circular grooves and plug-in circular blocks, and limit blocks and limit slots. The dimensions of these structures are precisely matched, and during the splicing process, the main splicing frame and the secondary splicing frame can be quickly guided to align with each other, greatly shortening the time for adjusting the position of the plates during splicing. At the same time, the splicing vertical rods and the splicing opposite rods, through the organic combination of plug-in grooves, plug-in blocks and fixing bolts, can not only further improve the accuracy of the splicing position and eliminate splicing errors, but also build a set of efficient splicing system. From splicing preparation to splicing completion, the entire process is simple and smooth, which significantly improves the efficiency of the splicing operation and greatly saves manpower and time costs.

[0005] In a first aspect of the present disclosure, a quick splicing structure for assembling protective plates is provided, which specifically includes a main splicing frame and a sub-splicing frame that are clamped together, the front side wall of the main splicing frame is rotatably connected to a rotation adjustment shaft on the left side, and a tightening plate is slidably connected to the rear side wall of the main splicing frame, the rear side wall of the sub-splicing frame is rotatably connected to the rotation adjustment shaft on the right side, and a tightening plate is slidably connected to the front side wall of the sub-splicing frame, a locking rod is rotatably connected in the middle of the sub-splicing frame, and a deflection button is hinged at the front end of the locking rod.

[0006] Furthermore, a splicing vertical rod is fixedly connected to the middle of the top of the main splicing frame, and circular plug-in grooves are provided in the middle and top right of the splicing vertical rod. Main splicing pieces are symmetrically provided on the front and back sides of the top of the splicing vertical rod, and inverted triangular left reinforcement grooves are symmetrically provided in the middle of the opposite side walls of the two main splicing pieces.

[0007] Furthermore, a splicing pair of rods is fixedly connected to the middle of the top of the auxiliary splicing frame, and circular plug-in blocks are provided in the middle and left side of the top of the splicing pair of rods. The plug-in blocks are inserted into the plug-in slots opened on the splicing vertical rods at the top of the main splicing frame and are connected through with fixing bolts. Auxiliary splicing pieces are symmetrically provided on the front and back sides of the top of the splicing pair of rods, and inverted triangular right reinforcement bevels are symmetrically opened in the middle of the opposite side walls of the two auxiliary splicing pieces.

[0008] Furthermore, a support spring is sleeved on the locking rod, the front end of the support spring is pressed against the rear side wall of the auxiliary splicing frame, and a locking plate is fixedly connected to the middle of the outer side wall of the locking rod.

[0009] Furthermore, a sliding groove is provided on the right side wall of the main splicing frame, a locking rod is passed through the sliding groove, a plug-in circular groove is provided in the middle of the rear side wall of the main splicing frame, and a locking slide and a locking groove that cooperate with the locking plate are provided on the front side wall of the plug-in circular groove. The locking slide and the locking groove are connected to each other, the depth of the locking groove is greater than the depth of the locking slide, and a limiting block is fixedly installed on the left rear side wall of the main splicing frame.

[0010] Furthermore, a limit slot is provided at the bottom of the left side wall of the auxiliary splicing frame, and the limit block on the left rear side wall of the main splicing frame is slidably engaged in the limit slot. A sliding wedge block is fixedly installed in the middle of the front side of the right end of the auxiliary splicing frame, and the sliding wedge block is engaged in the sliding groove of the main splicing frame.

[0011] Furthermore, a plug-in round block is provided in the middle of the front side wall of the auxiliary splicing frame, and the plug-in round block is slidably engaged in the plug-in round groove provided on the rear side wall of the main splicing frame.

[0012] Furthermore, an adjusting screw is fixedly connected to the middle of the side wall of the tightening plate, and the adjusting screw is threadedly connected to the rotating adjusting shaft.

[0013] Compared with the prior art, the present invention has the following beneficial effects: 1. The main splicing frame and the auxiliary splicing frame innovatively adopt multiple groups of structures such as sliding grooves and sliding wedges, plug-in circular grooves and plug-in circular blocks, and limit blocks and limit slots. The dimensions of these structures are precisely matched. During the splicing process, they can quickly guide the main splicing frame and the auxiliary splicing frame to align with each other, greatly shortening the time for adjusting the position of the plates during splicing. At the same time, the splicing vertical rods and the splicing opposite rods, through the organic combination of plug-in grooves, plug-in blocks and fixing bolts, can not only further improve the accuracy of the splicing position and eliminate splicing errors, but also build a set of efficient splicing system. From splicing preparation to splicing completion, the entire process is simple and smooth, which significantly improves the efficiency of the splicing operation and greatly saves manpower and time costs.

[0014] 2. The left and right reinforcement bevels on the main splicing piece and the auxiliary splicing piece, together with the fixed wedge, can fit tightly against the top of the protective plate to form a stable triangular support structure, effectively disperse the impact of external forces on the splicing parts, and significantly enhance the stability of the splicing parts. The clamping design of the limit block and the limit slot is like installing a horizontal "positioning anchor" for the splicing frame, which limits the displacement of the splicing frame during use and prevents the splicing frame from being dislocated. The locking system composed of the locking rod, support spring and locking plate provides a reliable locking function for the splicing structure. When the main splicing frame and After the auxiliary splicing frame is spliced into place, the locking rod is rotated clockwise through the deflection button and the support spring is compressed to rotate the locking piece ninety degrees in the locking slot. Then the deflection button is swung to the left so that the locking piece is stuck in the locking groove. The main splicing frame and the auxiliary splicing frame can be easily locked. This process does not require the use of additional tools. The operation is simple and the locking effect is reliable. It can effectively resist accidental unlocking caused by external force impact. The above-mentioned multiple stable designs fully guarantee the stability of the splicing structure and ensure that the protective plate can still maintain a stable splicing state when subjected to strong external forces such as strong winds and impacts.

[0015] 3. The operator only needs to gently turn the rotary adjustment shaft, and with the help of the threaded connection between the adjusting screw and the rotary adjustment shaft, he can easily drive the adjusting screw to move back and forth, thereby flexibly adjusting the position of the tightening plate. This design gives the splicing structure excellent adaptability. It can accurately adjust the clamping force of the tightening plate according to the actual thickness of the protective plate, and firmly clamp the protective plate between the main splicing frame and the auxiliary splicing frame to prevent the plate from shaking or displacement within the splicing structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings of the embodiments are briefly introduced below.

[0017] The drawings described below only relate to some embodiments of the present invention, but are not intended to limit the present invention.

[0018] In the attached figure: Figure 1 It is a schematic diagram of the right front side axial structure of the rapid splicing structure of an embodiment of the present invention.

[0019] Figure 2 It is a schematic diagram of the overall disassembly structure of the rapid splicing structure of an embodiment of the present invention.

[0020] Figure 3 1 is a schematic diagram of a top plan view of a rapid splicing structure according to an embodiment of the present invention.

[0021] Figure 4 It is a schematic diagram of the rear structure of the bottom of the quick splicing structure of an embodiment of the present invention.

[0022] Figure 5 It is a schematic diagram of the split structure of the splicing vertical rods and the splicing pair rods of the rapid splicing structure of an embodiment of the present invention.

[0023] Figure 6 It is a schematic cross-sectional structural diagram of a main splicing frame and an auxiliary splicing frame of a rapid splicing structure according to an embodiment of the present invention.

[0024] Figure 7 It is a schematic diagram of the bottom split front side structure of the quick splicing structure of an embodiment of the present invention.

[0025] Figure 8 It is a schematic diagram of the longitudinal section structure of the spliced vertical rods and the spliced paired rods of the rapid splicing structure of an embodiment of the present invention.

[0026] Reference Signs List 1. Main splicing frame; 101. Sliding slot; 102. Splicing vertical rod; 103. Plug-in slot; 104. Main splicing piece; 105. Left reinforcement bevel slot; 106. Plug-in round slot; 107. Locking slide slot; 10701. Locking groove; 108. Limiting block; 2. Auxiliary splicing frame; 201. Limiting slot; 202. Plug-in round block; 203. Sliding wedge block; 204. Splicing rod; 205. Plug-in block; 206. Auxiliary splicing piece; 207. Right reinforcement bevel slot; 3. Rotary adjustment shaft; 4. Clamping plate; 401. Adjusting screw; 5. Fixing bolt; 6. Locking rod; 601. Support spring; 602. Locking plate; 7. Deflection button. DETAILED DESCRIPTION

[0027] In order to make the purpose, scheme and advantages of the technical solution of the present invention more clear, the technical solution of the embodiment of the present invention will be clearly and completely described below in conjunction with the drawings of specific embodiments of the present invention. Unless otherwise specified, the terms used herein have the common meanings in the art. The same reference numerals in the drawings represent the same components.

[0028] Example 1: Please refer to Figures 1 to 8 As shown: The present invention provides a quick splicing structure for assembling protective plates, including a main splicing frame 1 and a secondary splicing frame 2 that are clamped together. The left side of the front side wall of the main splicing frame 1 is rotatably connected to a rotation adjustment shaft 3, and a tightening plate 4 is slidably connected to the rear side wall of the main splicing frame 1. The right side of the rear side wall of the secondary splicing frame 2 is rotatably connected to the rotation adjustment shaft 3, and a tightening plate 4 is slidably connected to the front side wall of the secondary splicing frame 2. A locking rod 6 is rotatably connected to the middle of the secondary splicing frame 2, and a deflection button 7 is hinged at the front end of the locking rod 6.

[0029] Among them, a splicing vertical rod 102 is fixedly connected to the middle of the top of the main splicing frame 1, and a circular plug-in groove 103 is opened in the middle and the right side of the top of the splicing vertical rod 102. The main splicing pieces 104 are symmetrically provided on the front and back sides of the top of the splicing vertical rod 102, and the middle of the opposite side walls of the two main splicing pieces 104 are symmetrically provided with inverted triangular left reinforcement bevel grooves 105.

[0030] Among them, a splicing pair of rods 204 is fixedly connected to the middle of the top of the auxiliary splicing frame 2, and a circular plug-in block 205 is provided in the middle and the left side of the top of the splicing pair of rods 204. The plug-in block 205 is inserted into the plug-in slot 103 opened on the splicing vertical rod 102 at the top of the main splicing frame 1 and is connected through with a fixing bolt 5. Auxiliary splicing pieces 206 are symmetrically provided on the front and back sides of the top of the splicing pair of rods 204, and an inverted triangular right reinforcement bevel 207 is symmetrically opened in the middle of the opposite side walls of the two auxiliary splicing pieces 206.

[0031] By adopting the above technical solution, an efficient splicing system is constructed through the exquisite structural design of the main splicing frame 1 and the auxiliary splicing frame 2, which can quickly complete the splicing of the protective plates. The splicing vertical rod 102 of the main splicing frame 1 and the splicing pair rod 204 of the auxiliary splicing frame 2, through the coordinated cooperation of the plug-in groove 103, the plug-in block 205 and the fixing bolt 5, can not only achieve accurate positioning of the splicing position and avoid splicing errors, but also greatly improve the connection strength of the splicing parts. At the same time, the left reinforcement bevel 105 and the right reinforcement bevel 207 on the main splicing piece 104 and the auxiliary splicing piece 206 are paired respectively. Through the unique bevel structure and the fixed wedge block, the top of the protective plate inserted in the main splicing piece 104 and the auxiliary splicing piece 206 is further reinforced, which greatly enhances the stability of the splicing part, effectively avoids the loosening of the splicing caused by uneven force, and ensures that the protective plate can still maintain a stable splicing state when subjected to a large external force impact.

[0032] The locking rod 6 is sleeved with a support spring 601 , the front end of the support spring 601 is pressed against the rear side wall of the auxiliary splicing frame 2 , and a locking piece 602 is fixedly connected to the middle of the outer side wall of the locking rod 6 .

[0033] Among them, a sliding groove 101 is provided on the right side wall of the main splicing frame 1, and a locking rod 6 is passed through the sliding groove 101. A plug-in circular groove 106 is provided in the middle of the rear side wall of the main splicing frame 1, and a locking groove 107 and a locking groove 10701 that cooperate with the locking piece 602 are provided on the front side wall of the plug-in circular groove 106. The locking groove 107 and the locking groove 10701 are connected to each other, and the depth of the locking groove 10701 is greater than the depth of the locking groove 107. A limiting block 108 is fixedly installed on the left rear side wall of the main splicing frame 1.

[0034] Among them, a limit card slot 201 is provided at the bottom of the left side wall of the auxiliary splicing frame 2, and the limit card block 108 on the left rear side wall of the main splicing frame 1 is slidably engaged in the limit card slot 201. A sliding wedge block 203 is fixedly installed at the middle of the right front end of the auxiliary splicing frame 2, and the sliding wedge block 203 is engaged in the sliding groove 101 of the main splicing frame 1.

[0035] The middle of the front side wall of the auxiliary splicing frame 2 is provided with an inserting round block 202 , and the inserting round block 202 is slidably engaged in the inserting round groove 106 provided on the rear side wall of the main splicing frame 1 .

[0036] By adopting the above technical solution, the main splicing frame 1 and the auxiliary splicing frame 2 use multiple groups of precisely matched structures such as the sliding groove 101 and the sliding wedge 203, the plug-in circular groove 106 and the plug-in circular block 202, the limit card block 108 and the limit card slot 201 to achieve rapid positioning and convenient installation during the splicing process. These structural designs enable the main splicing frame 1 and the auxiliary splicing frame 2 to be quickly aligned during splicing, greatly reducing the adjustment time during the splicing process and significantly improving the splicing efficiency. The clamping design of the limit card block 108 and the limit card slot 201 not only effectively constrains the displacement of the splicing frame in the horizontal direction, but also gives the splicing structure additional stability, prevents the splicing frame from being dislocated during use, and comprehensively guarantees the overall stability of the protective plate after splicing.

[0037] An adjusting screw 401 is fixedly connected to the middle of the side wall of the tightening plate 4 , and the adjusting screw 401 is threadedly connected to the rotating adjusting shaft 3 .

[0038] By adopting the above technical solution, through the threaded connection between the adjusting screw 401 and the rotating adjustment shaft 3, the operator only needs to rotate the rotating adjustment shaft 3, and utilize the threaded connection between the adjusting screw 401 and the rotating adjustment shaft 3 to drive the adjusting screw 401 to move back and forth, thereby realizing flexible control of the position of the tightening plate 4. This design enables the splicing structure to accurately adjust the clamping force of the tightening plate 4 according to the actual thickness of the protective plate, and firmly clamp the protective plate between the main splicing frame 1 and the auxiliary splicing frame 2, effectively preventing the plate from shaking or displacing in the splicing structure, and significantly improving the adaptability of the splicing structure to protective plates of different thicknesses. When unlocking, bend the deflection button 7 back, and under the elastic action of the support spring 601, the locking piece 602 pops out from the locking groove 10701, and then rotate the deflection button 7 counterclockwise to release the lock between the main splicing frame 1 and the auxiliary splicing frame 2.

[0039] The specific usage and function of this embodiment: In the present invention, by holding the auxiliary splicing frame 2, the sliding block 203 at the right end of the auxiliary splicing frame 2 is aligned with the sliding groove 101 on the right side wall of the main splicing frame 1, and at the same time, the plug-in round block 202 on the front side wall of the auxiliary splicing frame 2 is aligned with the plug-in round groove 106 on the rear side wall of the main splicing frame 1, and the limiting card groove 201 on the left side wall of the auxiliary splicing frame 2 is aligned with the limiting card block 108 on the right rear side wall of the main splicing frame 1, and the auxiliary splicing frame 2 is slowly pushed to make the sliding block 203 snap into the sliding groove 101, the plug-in round block 202 slides into the plug-in round groove 106, and the limiting card block 108 slides into the limiting card groove 201, completing the connection between the main splicing frame 1 and the auxiliary splicing frame After the initial positioning of the connecting frame 2 in the horizontal direction, align the plug-in block 205 on the splicing pair rod 204 with the plug-in slot 103 on the splicing vertical rod 102 of the main splicing frame 1. After inserting it into place, use the fixing bolt 5 to pass through the plug-in block 205 and the plug-in slot 103, tighten the fixing bolt 5, and realize the stable connection between the top of the main splicing frame 1 and the auxiliary splicing frame 2. At this time, the main splicing piece 104 and the auxiliary splicing piece 206 are facing both sides respectively, and the top of the adjacent protective plate can be inserted between the two, and by embedding it into the left reinforcement bevel 105 and the right reinforcement bevel 207, the gap between the protective plate and the main splicing piece 104 and the auxiliary splicing piece 206 is filled to complete the connection. To reinforce the top of the protective plate, for protective plates of different thicknesses, rotate the rotary adjustment shaft 3 on the left side of the front side wall of the main splicing frame 1, and drive the tightening plate 4 to slide on the rear side wall of the main splicing frame 1 through the threaded transmission of the adjusting screw 401 and the rotary adjustment shaft 3. Similarly, rotate the rotary adjustment shaft 3 on the right side of the front side wall of the auxiliary splicing frame 2 to adjust the position of the tightening plate 4 on the auxiliary splicing frame 2 until the two tightening plates 4 fit tightly against the two side walls of the protective plate, providing appropriate clamping force to prevent the protective plate from shaking in the splicing structure. When the main splicing frame 1 and the auxiliary splicing frame 2 are spliced in place, turn the locking rod 6 clockwise through the deflection button 7 and compress the support spring 601. The locking piece 602 is rotated ninety degrees in the locking slot 107, and then the deflection button 7 is swung to the left so that the locking piece 602 is stuck in the locking groove 10701, and the main splicing frame 1 and the auxiliary splicing frame 2 can be easily locked. This process does not require the use of additional tools, is easy to operate, and the locking effect is reliable. It can effectively resist accidental unlocking caused by external force impact, and further enhance the stability and safety of the splicing structure. When unlocking, the deflection button 7 is bent back, and under the elastic force of the support spring 601, the locking piece 602 pops out of the locking groove 10701, and then the deflection button 7 is rotated counterclockwise to release the lock between the main splicing frame 1 and the auxiliary splicing frame 2.

[0040] The above description is merely an exemplary embodiment of the present invention and is not intended to limit the scope of protection of the present invention. The scope of protection of the present invention is determined by the appended claims.

Claims

1. A quick splicing structure for assembling protective plates, characterized by: The utility model comprises a main splicing frame (1) and a sub-splicing frame (2) which are connected to each other, wherein the left side of the front side wall of the main splicing frame (1) is rotatably connected to a rotation adjustment shaft (3) and the rear side wall of the main splicing frame (1) is slidably connected to a tightening plate (4), the right side of the rear side wall of the sub-splicing frame (2) is rotatably connected to the rotation adjustment shaft (3) and the front side wall of the sub-splicing frame (2) is slidably connected to a tightening plate (4), and the middle part of the sub-splicing frame (2) is rotatably connected to a locking rod (6), and the front end of the locking rod (6) is hingedly connected to a deflection button (7).

2. A quick splicing structure for assembling a protective plate as claimed in claim 1, characterized in that: A splicing vertical rod (102) is fixedly connected to the middle of the top of the main splicing frame (1), and a circular plug-in groove (103) is provided in the middle and on the right side of the top of the splicing vertical rod (102). Main splicing pieces (104) are symmetrically provided on the front and back sides of the top of the splicing vertical rod (102), and an inverted triangular left reinforcement bevel groove (105) is symmetrically provided in the middle of the opposite side walls of the two main splicing pieces (104).

3. A quick splicing structure for assembling a protective plate as claimed in claim 2, characterized in that: A splicing pair rod (204) is fixedly connected to the middle of the top of the auxiliary splicing frame (2), and a circular plug-in block (205) is provided in the middle and on the left side of the top of the splicing pair rod (204). The plug-in block (205) is plugged into the plug-in slot (103) provided on the splicing vertical rod (102) at the top of the main splicing frame (1) and is connected through a fixing bolt (5). Auxiliary splicing pieces (206) are symmetrically provided on the front and back sides of the top of the splicing pair rod (204), and an inverted triangle-shaped right reinforcement bevel groove (207) is symmetrically provided in the middle of the opposite side walls of the two auxiliary splicing pieces (206).

4. The quick splicing structure for assembling a protective plate according to claim 1, characterized in that: A support spring (601) is sleeved on the locking rod (6), the front end of the support spring (601) is abutted against the rear side wall of the auxiliary splicing frame (2), and a locking plate (602) is fixedly connected to the middle of the outer side wall of the locking rod (6).

5. A quick splicing structure for assembling a protective plate as claimed in claim 4, characterized in that: A sliding groove (101) is provided on the right side wall of the main splicing frame (1), a locking rod (6) is provided in the sliding groove (101), a plug-in circular groove (106) is provided in the middle of the rear side wall of the main splicing frame (1), a locking groove (107) and a locking groove (10701) that cooperate with the locking plate (602) are provided on the front side wall of the plug-in circular groove (106), the locking groove (107) and the locking groove (10701) are communicated with each other, the depth of the locking groove (10701) is greater than the depth of the locking groove (107), and a limiting block (108) is fixedly installed on the left rear side wall of the main splicing frame (1).

6. A quick splicing structure for assembling a protective plate as claimed in claim 5, characterized in that: A limit slot (201) is provided at the bottom of the left side wall of the auxiliary splicing frame (2), and a limit block (108) on the left rear side wall of the main splicing frame (1) is slidably engaged in the limit slot (201). A sliding block (203) is fixedly installed at the middle of the front side of the right end of the auxiliary splicing frame (2), and the sliding block (203) is engaged in the sliding groove (101) of the main splicing frame (1).

7. The quick splicing structure for assembling a protective plate as claimed in claim 5, characterized in that: A plug-in circular block (202) is provided in the middle of the front side wall of the auxiliary splicing frame (2), and the plug-in circular block (202) is slidably engaged in a plug-in circular groove (106) provided on the rear side wall of the main splicing frame (1).

8. The quick splicing structure for assembling a protective plate according to claim 1, characterized in that: An adjusting screw (401) is fixedly connected to the middle of the side wall of the tightening plate (4), and the adjusting screw (401) is threadedly connected to the rotating adjusting shaft (3).

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