Anti-deformation glass fiber reinforced plastic extruded and pulled profile traction device

Abstract

The utility model discloses an anti-deformation glass fiber reinforced plastic pultrusion profile traction device, which relates to the technical field of glass fiber reinforced plastic pultrusion, and is characterized by comprising a bottom plate and four supporting legs fixedly arranged on the bottom surface of the bottom plate, and an extrusion mechanism and a traction mechanism are arranged above the bottom plate; the device has the technical effects that the extrusion mechanism is provided with a plurality of extrusion rollers with adjustable height, an electric telescopic rod with an anti-deformation function and two groups of sliding rollers, so that on one hand, the height of the extrusion rollers can be adjusted according to actual requirements, and the applicability of the device is enhanced; on the other hand, in the extruding and pulling process of the glass fiber reinforced plastic, the front and rear ends of the glass fiber reinforced plastic are effectively limited through electric telescopic rods and sliding rollers, deformation is prevented, meanwhile, an electric push rod and a telescopic connecting rod on the top face of a fixing frame ensure stable horizontal sliding of a lifting frame, and a limiting rod and a control rod on a connecting frame are matched to make a connecting frame and the sliding rollers move accurately and stably.

Description

TECHNICAL FIELD

[0001] The utility model relates to glass fiber reinforced plastic extrusion technology field, concretely is a kind of glass fiber reinforced plastic extrusion profile traction device that can prevent deformation. BACKGROUND

[0002] Glass fiber reinforced plastic profile is widely used in chemical industry, communication, construction and other industries due to its excellent high-temperature resistance, corrosion resistance, low moisture absorption and other characteristics. Glass fiber reinforced plastic profile is mainly produced by pultrusion machine;

[0003] China patent network publishes a kind of glass fiber reinforced plastic pultrusion profile traction device, and the publication number is CN218171476U, including machine tool, traction assembly is installed on the top end of machine tool one side, gantry is installed on the top side wall of machine tool, lifting plate beam is clamped and installed in the middle of gantry, press roll and fan are installed on the bottom wall of lifting plate beam, air guide shell is clamped and installed on the surface of fan, conveying roller is installed on the top end groove side wall of machine tool. The glass fiber reinforced plastic pultrusion profile traction device, the lifting plate beam is driven by the air cylinder and slide bar on the gantry to follow the glass fiber reinforced plastic profile to adjust the distance between the upper and lower, so that the glass fiber reinforced plastic profile is orderly pulled and extruded, and the air guide shell is used to guide the fan to push air flow. It not only assists the surface cooling of glass fiber reinforced plastic profile, but also removes the impurities and slag attached to the surface of glass fiber reinforced plastic profile with the cooperation of press roll and conveying roller, so that the slag on the collection plate is shaken and falls into the waste box, the heat and odor air generated during the cooling of glass fiber reinforced plastic profile are collected and purified, the pollution is reduced, and the health of employees is protected.

[0004] The above-mentioned traction device only focuses on the traction function when the glass fiber reinforced plastic is extruded, lacks deformation control of the glass fiber reinforced plastic profile during extrusion, and is easy to cause deformation of the glass fiber reinforced plastic profile after extrusion, which affects the product quality. Therefore, a glass fiber reinforced plastic extrusion profile traction device that can prevent deformation is proposed. UTILITY MODEL CONTENTS

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: a glass fiber reinforced plastic extrusion profile traction device that can prevent deformation, comprising a bottom plate and four supporting legs fixedly arranged on the bottom surface of the bottom plate, an extrusion mechanism and a traction mechanism are arranged above the bottom plate.

[0006] The traction mechanism is close to the right side of the bottom plate, and the extrusion mechanism is close to the left side of the bottom plate.

[0007] The extrusion mechanism comprises an extrusion part and a deformation prevention part.

[0008] The extrusion part comprises a fixing frame and a plurality of extrusion rollers, and the deformation prevention part comprises an electric telescopic rod and two groups of sliding rollers.

[0009] The bottom plate front and rear end faces are fixedly provided with connecting frames, the front and rear end faces of the connecting frames are fixedly provided with two supporting connecting rods respectively, the proximal sides of the two supporting connecting rods are fixedly provided with two connecting frames respectively, the inner sides of the two connecting frames are rotatably connected with the upper and lower end faces of two groups of sliding rollers through two bearing seats one respectively, two sliding grooves are penetratingly formed in the top face of the connecting frame, two control rods are slidingly arranged in the inner walls of the two sliding grooves respectively, and the bottom faces of the two control rods are fixedly connected with the top faces of the two connecting frames respectively.

[0010] Preferably, the traction mechanism comprises a traction device, the bottom face of the traction device is fixedly connected with the top face of the bottom plate, the left side face of the traction end of the traction device is fixedly provided with a traction plate, the left side face of the traction plate is fixedly provided with a supporting plate, the left side face of the traction plate is slidingly provided with a pressing plate, two adjusting grooves are formed in the bottom face of the pressing plate, two adjusting plates are slidingly arranged in the inner walls of the two adjusting grooves respectively, two through grooves are penetratingly formed in the top face of the pressing plate, two control frames are slidingly arranged in the inner walls of the two through grooves respectively, the bottom faces of the two control frames are fixedly connected with the top faces of the two adjusting plates respectively, and a fixed frame is fixedly arranged on the top face of the pressing plate.

[0011] Preferably, the bottom face of the fixed frame is fixedly connected with the top face of the bottom plate, a conveying belt is fixedly arranged on the top face of the bottom plate, a lifting frame is horizontally slidingly arranged on the inner side of the fixed frame, a plurality of extrusion rollers are horizontally rotatably arranged on the inner side of the lifting frame through a plurality of groups of bearing seats two respectively, an electric push rod is fixedly arranged on the top face of the fixed frame, the output end of the electric push rod extends to the inner side of the fixed frame through the top face of the fixed frame, the output end of the electric push rod is fixedly connected with the top face of the lifting frame, and two telescopic connecting rods are fixedly arranged on the top face of the fixed frame.

[0012] Preferably, two connecting plates are fixedly arranged on the left side faces of the two control rods respectively, two connecting rods are hingedly arranged on the left side faces of the two connecting plates respectively, a moving plate is slidingly arranged on the top face of the connecting frame, and the right side face of the moving plate is hingedly connected with the left side faces of the two connecting rods respectively.

[0013] Preferably, the top face of the connecting frame is fixedly connected with the bottom face of the electric telescopic rod, the output end of the electric telescopic rod is fixedly connected with the left side face of the moving plate, a sliding rail is fixedly arranged on the top face of the connecting frame, a connecting groove is formed in the bottom face of the moving plate, the surface of the sliding rail is slidingly connected with the inner wall of the connecting groove, a limiting rod is horizontally fixedly arranged on the inner wall of the sliding groove, two limiting holes are penetratingly formed in the front and rear end faces of the two control rods respectively, and the surface of the limiting rod is slidingly connected with the inner walls of the two limiting holes respectively.

[0014] Preferably, the top surface of the fixed frame is provided with a rectangular slot, the top surface of each of the two control frames is provided with two threaded holes, the inner part of each of the two threaded holes is provided with a bolt in a threaded manner, the top surface of each of the two bolts extends to the upper side of the fixed frame through the rectangular slot, and the surface of each of the two bolts is fixedly provided with an extrusion ring.

[0015] Preferably, the top surface of the traction plate is fixedly provided with a mounting frame, the top surface of the pressing plate is fixedly provided with a threaded rod, the top surface of the threaded rod extends to the upper side of the mounting frame through the inner top surface of the mounting frame, the top surface of the mounting frame is rotatably provided with a nut through a bearing seat, the inner side surface of the nut is threadedly connected with the surface of the threaded rod, the left side surface of the traction plate is provided with a wedge-shaped slot, and the right side surface of the pressing plate is fixedly provided with a wedge-shaped block. Beneficial effects

[0016] Compared with the prior art, the traction device for the glass fiber reinforced plastic pultruded profile has the following beneficial effects:

[0017] 1. The extrusion mechanism is provided with a plurality of adjustable height extrusion rollers and two groups of sliding rollers with a deformation prevention function, on the one hand, the height of the extrusion rollers can be adjusted according to actual needs, and the applicability of the device is enhanced, on the other hand, during the glass fiber reinforced plastic pultrusion process, the front and rear ends of the glass fiber reinforced plastic are effectively limited by the electric telescopic rod and the sliding roller, deformation of the glass fiber reinforced plastic is prevented, the electric push rod on the top surface of the fixing frame and the telescopic connecting rod ensure that the lifting frame slides horizontally stably, the limiting rod on the connecting frame cooperates with the control rod to make the connecting frame and the sliding roller move accurately and stably, and the shape stability and quality of the glass fiber reinforced plastic pultruded profile are greatly improved.

[0018] 2. The traction mechanism firmly fixes the glass fiber reinforced plastic through the pressing plate, the adjusting plate, the control frame, the bolt and the extrusion ring, prevents deformation during the pultrusion process, and the design of the mounting frame, the threaded rod, the nut, the wedge-shaped slot and the wedge-shaped block makes the pressing plate move stably and reliably up and down, is convenient and efficient to operate, and greatly improves the stability and operation convenience during the production process of the glass fiber reinforced plastic pultruded profile. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is a front view of the utility model;

[0020] Figure 2 It is a left side view of the utility model;

[0021] Figure 3 It is a top view of the utility model;

[0022] Figure 4 It is a left side view of the utility model;

[0023] Figure 5 For the utility model Figure 3 A zone amplification perspective view.

[0024] In the figure: 1, bottom plate; 2, extrusion mechanism; 21, fixed frame; 22, conveying belt; 23, telescopic connecting rod; 24, electric push rod; 25, connecting frame; 26, electric telescopic rod; 27, extrusion roller; 28, lifting frame; 29, connecting plate; 210, connecting rod; 211, electric telescopic rod; 212, moving plate; 213, control rod; 214, limit rod; 215, support connecting rod; 216, connecting frame; 217, slide roller; 3, traction mechanism; 31, traction device; 32, adjusting plate; 33, traction plate; 34, fixed frame; 35, supporting plate; 36, extrusion ring; 37, bolt; 38, control frame; 39, mounting frame; 310, threaded rod; 311, nut; 312, lower pressing plate; 4, supporting leg. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model. Embodiment 1

[0026] As Figures 1-5 shown, the embodiment provides, including the bottom plate 1 and the four supporting legs 4 fixedly arranged on the bottom surface of the bottom plate 1, the bottom plate 1 is provided with extrusion mechanism 2 and traction mechanism 3 above it;

[0027] The traction mechanism 3 is close to the right side of the bottom plate 1, and the extrusion mechanism 2 is close to the left side of the bottom plate 1;

[0028] The extrusion mechanism 2 includes an extrusion part and an anti-deformation part;

[0029] The extrusion part includes a fixed frame 21 and a plurality of extrusion rollers 27, and the anti-deformation part includes an electric telescopic rod 26 and two groups of slide rollers 217;

[0030] The bottom plate 1 is provided with a connecting frame 25 at the front and rear ends, two support connecting rods 215 are fixedly arranged at the front and rear ends of the connecting frame 25 respectively, two connecting frames 216 are fixedly arranged at the side close to the two support connecting rods 215 respectively, the inner side of the two connecting frames 216 is rotatably connected with the upper and lower ends of the two groups of slide rollers 217 through two bearing seats one, two sliding grooves are formed through the top surface of the connecting frame 25, two control rods 213 are slidably arranged in the inner walls of the two sliding grooves respectively, the bottom surfaces of the two control rods 213 are fixedly connected with the top surfaces of the two connecting frames 216 respectively, the bottom surface of the fixed frame 21 is fixedly connected with the top surface of the bottom plate 1, a conveying belt 22 is fixedly arranged on the top surface of the bottom plate 1, a lifting frame 28 is horizontally slidably arranged on the inner side of the fixed frame 21, a plurality of extrusion rollers 27 are horizontally rotatably arranged on the inner side of the lifting frame 28 through a plurality of bearing seats two, an electric push rod 24 is fixedly arranged on the top surface of the fixed frame 21, the output end of the electric push rod 24 extends to the inner side of the fixed frame 21 through the top surface of the fixed frame 21, the bottom surface of the output end of the electric push rod 24 is fixedly connected with the top surface of the lifting frame 28, two telescopic connecting rods 23 are fixedly arranged on the top surface of the fixed frame 21, the bottom surfaces of the two telescopic connecting rods 23 extend to the inside of the fixed frame 21 through the top surface of the fixed frame 21, and the bottom surfaces of the two telescopic connecting rods 23 are fixedly connected with the top surface of the lifting frame 28. Two connecting plates 29 are fixedly arranged on the left side surfaces of the two control rods 213 respectively, two connecting rods 210 are hingedly arranged on the left side surfaces of the two connecting plates 29 respectively, a moving plate 212 is slidably arranged on the top surface of the connecting frame 25, the right side surface of the moving plate 212 is hingedly connected with the left side surfaces of the two connecting rods 210 respectively, the top surface of the connecting frame 25 is fixedly connected with the bottom surface of an electric telescopic rod 26, the left side surface of the output end of the electric telescopic rod 26 is fixedly connected with the right side surface of the moving plate 212, a sliding rail 211 is fixedly arranged on the top surface of the connecting frame 25, a connecting groove is formed in the bottom surface of the moving plate 212, the surface of the sliding rail 211 is slidably connected with the inner wall of the connecting groove, a limiting rod 214 is horizontally fixedly arranged on the inner wall of the sliding groove, two limiting holes are formed through the front and rear end surfaces of the two control rods 213 respectively, and the surface of the limiting rod 214 is slidably connected with the inner walls of the two limiting holes respectively.

[0031] In the embodiment, the extrusion mechanism 2 is provided with the plurality of extrusion rollers 27 with adjustable height and the electric telescopic rod 26 with the anti-deformation function and the two groups of slide rollers 217, on the one hand, the height of the extrusion roller 27 can be adjusted according to actual needs, and the applicability of the device is enhanced; on the other hand, in the glass steel extrusion process, the front and rear ends of the glass steel are effectively limited by the electric telescopic rod 26 and the slide roller 217, so that the deformation of the glass steel is prevented, and the electric push rod 24 and the telescopic connecting rod 23 on the top surface of the fixed frame 21 ensure the stable horizontal sliding of the lifting frame 28, the limiting rod 214 on the connecting frame 25 cooperates with the control rod 213 to make the connecting frame 216 and the slide roller 217 move accurately and stably, and the shape stability and quality of the glass steel extruded profile are greatly improved. Embodiment 2

[0032] AsFigures 1-5 As shown, based on the same concept as in Embodiment 1, this embodiment also proposes that the traction mechanism 3 comprises a traction device 31, the bottom surface of which is fixedly connected to the top surface of the bottom plate 1, the left side surface of the traction end of the traction device 31 is fixedly provided with a traction plate 33, the left side surface of the traction plate 33 is fixedly provided with a supporting plate 35, the left side surface of the traction plate 33 is slidingly provided with a pressing plate 312, two adjusting grooves are formed in the bottom surface of the pressing plate 312, two adjusting plates 32 are slidingly arranged in the inner walls of the two adjusting grooves respectively, two through grooves are formed in the top surface of the pressing plate 312, two control frames 38 are slidingly arranged in the inner walls of the two through grooves respectively, the bottom surfaces of the two control frames 38 are fixedly connected to the top surfaces of the two adjusting plates 32 respectively, a fixed frame 34 is fixedly arranged on the top surface of the pressing plate 312, the surfaces of the two control frames 38 are slidingly connected to the inner side surface of the fixed frame 34, a rectangular groove is formed in the top surface of the fixed frame 34, two threaded holes are formed in the top surfaces of the two control frames 38 respectively, two bolts 37 are threadedly arranged in the inner parts of the two threaded holes respectively, the top surfaces of the two bolts 37 extend through the rectangular groove to above the fixed frame 34, two extrusion rings 36 are fixedly arranged on the surfaces of the two bolts 37 respectively, the bottom surfaces of the two extrusion rings 36 are in contact with the top surface of the fixed frame 34, a mounting frame 39 is fixedly arranged on the top surface of the traction plate 33, a threaded rod 310 is fixedly arranged on the top surface of the pressing plate 312, the top surface of the threaded rod 310 extends through the inner top surface of the mounting frame 39 to above the mounting frame 39, a nut 311 is rotatably arranged on the top surface of the mounting frame 39 through a bearing seat, the inner side surface of the nut 311 is threadedly connected to the surface of the threaded rod 310, a wedge-shaped groove is formed in the left side surface of the traction plate 33, and a wedge-shaped block is fixedly arranged on the right side surface of the pressing plate 312. The inner wall of the wedge-shaped groove is slidingly connected to the surface of the wedge-shaped block.

[0033] In this embodiment, the traction mechanism 3 firmly fixes the glass steel through the structures such as the pressing plate 312, the adjusting plate 32, the control frame 38, the bolt 37 and the extrusion ring 36, prevents deformation during the extrusion process, and at the same time, the design of the mounting frame 39, the threaded rod 310, the nut 311, and the wedge-shaped groove and the wedge-shaped block makes the pressing plate 312 stable and reliable when moving up and down, which is convenient and efficient to operate, greatly improving the stability and operation convenience in the production process of the glass steel extruded profile.

[0034] In use, first, the glass fiber reinforced plastic is placed above the conveying belt 22, the two adjusting plates 32 are adjusted according to the width of the glass fiber reinforced plastic, the two control frames 38 are manually adjusted during the adjustment, the two screws 37 are tightened after the adjustment is completed, so that the bottom surfaces of the two extrusion rings 36 are in contact with the top surface of the fixed frame 34, and then the two adjusting plates 32 can be fixed, the traction plate 33 is manually controlled to move to the glass fiber reinforced plastic after the adjustment is completed, the nut 311 is manually controlled to rotate, the lower pressing plate 312 and the two adjusting plates 32 can be moved downward through the threaded rod 310 and the wedge block when the nut 311 is rotated, and the glass fiber reinforced plastic can be fixed when the two adjusting plates 32 and the lower pressing plate 312 are moved downward;

[0035] After the fixing is completed, the electric push rod 24 is controlled to move downward, the plurality of extrusion rollers 27 can be in contact with the glass fiber reinforced plastic when the electric push rod 24 moves downward, and then the height of the plurality of extrusion rollers 27 is adjusted, the electric telescopic rod 26 is turned on after the height of the plurality of extrusion rollers 27 is adjusted, the moving plate 212 can be moved left and right when the output end of the electric telescopic rod 26 is telescoped, the distance between the two control rods 213 can be adjusted through the two connecting rods 210 when the moving plate 212 is moved left and right, the two connecting frames 216 and the two groups of sliding rollers 217 can be moved when the two control rods 213 are moved, the front end and the rear end of the glass fiber reinforced plastic can be limited when the glass fiber reinforced plastic is extruded and drawn after the distance between the two groups of sliding rollers 217 is adjusted, deformation of the glass fiber reinforced plastic during extrusion and drawing is avoided, and the glass fiber reinforced plastic can be drawn after the plurality of extrusion rollers 27 and the two groups of sliding rollers 217 are adjusted, and the glass fiber reinforced plastic can be extruded and drawn when being drawn.

[0036] The above is only a specific embodiment of the present application, but the technical features of the present application are not limited to this. Any simple change, equivalent replacement or modification made on the basis of the present application to solve the same technical problem and achieve the same technical effect is covered by the protection scope of the present application.

Claims

1. A deformation-preventable glass fiber reinforced plastic pultrusion profile traction device, comprising a base plate (1) and four supporting legs (4) fixedly arranged on the bottom surface of the base plate (1), characterized in that: The bottom plate (1) is provided with an extrusion mechanism (2) and a traction mechanism (3) above; The traction mechanism (3) is close to the right side of the bottom plate (1), and the extrusion mechanism (2) is close to the left side of the bottom plate (1); The extrusion mechanism (2) comprises an extrusion part and an anti-deformation part; The extrusion part comprises a fixed frame (21) and a plurality of extrusion rollers (27), and the anti-deformation part comprises an electric telescopic rod (26) and two groups of slide rollers (217); The bottom plate (1) is provided with a connecting frame (25) on the front and rear end faces, two support connecting rods (215) are respectively fixedly arranged on the front and rear end faces of the connecting frame (25), two connecting frames (216) are respectively fixedly arranged on the side faces close to the two support connecting rods (215), the inner side upper and lower end faces of the two connecting frames (216) are rotatably connected with the upper and lower end faces of the two groups of slide rollers (217) through two bearing seats one, two slide grooves are formed in the top face of the connecting frame (25), two control rods (213) are slidably arranged in the inner walls of the two slide grooves, and the bottom faces of the two control rods (213) are fixedly connected with the top faces of the two connecting frames (216).

2. The anti-deformation glass fiber reinforced plastic pultrusion profile traction device according to claim 1, characterized in that: The traction mechanism (3) comprises a traction device (31), the bottom face of the traction device (31) is fixedly connected with the top face of the bottom plate (1), a traction plate (33) is fixedly arranged on the left side face of the traction end of the traction device (31), a supporting plate (35) is fixedly arranged on the left side face of the traction plate (33), a pressing plate (312) is slidably arranged on the left side face of the traction plate (33), two adjusting grooves are formed in the bottom face of the pressing plate (312), two adjusting plates (32) are slidably arranged in the inner walls of the two adjusting grooves, two through grooves are formed in the top face of the pressing plate (312), two control frames (38) are slidably arranged in the inner walls of the two through grooves, the bottom faces of the two control frames (38) are fixedly connected with the top faces of the two adjusting plates (32), and a fixed frame (34) is fixedly arranged on the top face of the pressing plate (312).

3. The anti-deformation glass fiber reinforced plastic pultrusion material traction device according to claim 1, characterized in that: The bottom face of the fixed frame (21) is fixedly connected with the top face of the bottom plate (1), a conveying belt (22) is fixedly arranged on the top face of the bottom plate (1), a lifting frame (28) is horizontally slidably arranged on the inner side face of the fixed frame (21), a plurality of extrusion rollers (27) are horizontally rotatably arranged on the inner side front and rear end faces of the lifting frame (28) through a plurality of groups of bearing seats two, an electric push rod (24) is fixedly arranged on the top face of the fixed frame (21), the output end bottom face of the electric push rod (24) extends to the inner side of the fixed frame (21) through the top face of the fixed frame (21), the output end bottom face of the electric push rod (24) is fixedly connected with the top face of the lifting frame (28), and two telescopic connecting rods (23) are fixedly arranged on the top face of the fixed frame (21).

4. The anti-deformation glass fiber reinforced plastic pultrusion material traction device according to claim 1, characterized in that: Two left sides of the two control rods (213) are respectively fixedly provided with two connecting plates (29), left sides of the two connecting plates (29) are respectively hingedly provided with two connecting rods (210), a top surface of the connecting frame (25) is slidably provided with a moving plate (212), and right sides of the moving plate (212) are respectively hingedly connected with left sides of the two connecting rods (210).

5. The anti-deformation glass fiber reinforced plastic pultrusion material traction device according to claim 1, characterized in that: The connecting frame (25) is fixedly connected with the bottom surface of the electric telescopic rod (26), the output end of the electric telescopic rod (26) is fixedly connected with the left side of the moving plate (212), the top surface of the connecting frame (25) is fixedly provided with a sliding rail (211), the bottom surface of the moving plate (212) is provided with a connecting groove, the surface of the sliding rail (211) is slidably connected with the inner wall of the connecting groove, the inner wall of the sliding groove is fixedly provided with a limiting rod (214), and the front and rear end surfaces of the two control rods (213) are respectively provided with two limiting holes.

6. The anti-deformation glass fiber reinforced plastic pultrusion material traction device according to claim 2, characterized in that: The top surface of the fixed frame (34) is provided with a rectangular groove, the top surfaces of the two control frames (38) are respectively provided with two threaded holes, and the inner parts of the two threaded holes are respectively provided with two bolts (37) in a threaded mode, the top surfaces of the two bolts (37) are both extended to above the fixed frame (34) through the rectangular groove, the surfaces of the two bolts (37) are respectively fixedly provided with two extrusion rings (36), and the bottom surfaces of the two extrusion rings (36) are both in contact with the top surface of the fixed frame (34).

7. The anti-deformation glass fiber reinforced plastic pultrusion material traction device according to claim 2, characterized in that: The top surface of the traction plate (33) is fixedly provided with a mounting frame (39), the top surface of the lower pressing plate (312) is fixedly provided with a threaded rod (310), the top surface of the threaded rod (310) is extended to above the mounting frame (39) through the inner top surface of the mounting frame (39), the top surface of the mounting frame (39) is rotatably provided with a nut (311) through a bearing seat, the inner surface of the nut (311) is threadedly connected with the surface of the threaded rod (310), the left side of the traction plate (33) is provided with a wedge-shaped groove, the right side of the lower pressing plate (312) is fixedly provided with a wedge-shaped block, and the inner wall of the wedge-shaped groove is slidably connected with the surface of the wedge-shaped block.

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