CN212503353U

CN212503353U - Double-disc looping machine

Info

Publication number: CN212503353U
Application number: CN202021016202.2U
Authority: CN
Inventors: 周章银; 储彬; 王明
Original assignee: Hefei Smarter Technology Group Corp
Current assignee: Hefei Smarter Technology Group Corp
Priority date: 2020-06-05
Filing date: 2020-06-05
Publication date: 2021-02-09
Anticipated expiration: 2030-06-05

Abstract

The utility model discloses a double plate looping machine, include bottom frame, upper portion frame, walk line mechanism, winding displacement mechanism and embrace line mechanism, the upper portion frame is installed on the upper portion of bottom frame, walk the line mechanism and install the one side at the bottom frame, winding displacement mechanism installs the top at the bottom frame, and embraces the opposite side that line mechanism installed at the bottom frame. Through setting up two interior posts for the efficiency of cable lopping obtains improving, and a coil shaping back, at the in-process that removes, the normal winding lopping of cable can be continued to another interior post, can realize incessant work. When the coil of the other end needs to be taken away simultaneously, at first the rolling disc rotates under the drive of driving motor, and then drives the bearing plate and rotates, and then makes the direction that the mounting panel removed receive the change, makes things convenient for two splint to press from both sides the other end coil and gets.

Description

Double-disc looping machine

Technical Field

The utility model relates to a looping machine, concretely relates to double plate looping machine belongs to cable processing application.

Background

After the cable is manufactured, the cable coil needs to be coiled, so that the space occupied by the cable is reduced, and the cable can be conveniently transported, taken and placed. When the cable is looped, the cable needs to be wound by a looping machine.

However, the existing looping machine still has certain defects in use. The existing looping machine has simple structure and low looping efficiency, and can not be quickly adjusted according to different coil positions and coil sizes. The coil appears discontinuously easily in the looping process, causes the waste of time, and work efficiency is low.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a two-disk looping machine can solve current looping machine simple structure, and the inefficiency of looping can not carry out quick regulation according to coil position and the coil size of difference. The coil appears discontinuously easily in the looping process, causes the waste of time, technical problem that work efficiency is low.

The purpose of the utility model can be realized by the following technical scheme:

the utility model provides a double plate looping machine, includes bottom frame, upper portion frame, walks line mechanism, winding displacement mechanism and embraces line mechanism, the upper portion frame is installed on the upper portion of bottom frame, walk line mechanism and install the one side at the bottom frame, winding displacement mechanism installs at the top of bottom frame, and embraces the opposite side that line mechanism installed at the bottom frame.

Embrace line mechanism and include the bracing piece, the rolling disc is installed at the top of bracing piece, the bearing plate is installed at the top of rolling disc, the one end slidable mounting that the bottom frame was kept away from at the top of bearing plate has the locating plate, the locating plate rotates towards the one end of bottom frame and is connected with the mounting panel, the one end that the top of mounting panel is close to the locating plate is rotated and is installed the compression roller, the one end that the top of locating plate is close to the mounting panel is installed the third hydro-cylinder, the flexible end of third hydro-cylinder is connected with the push.

Rotatable force receiving arms are mounted on two sides of the other end of the top of the mounting plate, and arc-shaped clamping plates are connected to opposite side faces of one end, close to the bottom frame, of each of the two force receiving arms; the other end of the force receiving arm is rotatably connected with the mounting plate through a rotating shaft, one opposite side of the middle parts of the two force receiving arms is rotatably connected with a supporting rod through a pin shaft, one opposite end of the two supporting rods is rotatably mounted in the support, one end of the support is connected with the telescopic end of a second oil cylinder, and the second oil cylinder is mounted on the upper portion of the mounting plate.

Preferably, winding displacement mechanism includes the loading board, and the bottom of loading board is connected with the top of bottom frame through a plurality of montant, and the both ends of loading board all run through and are provided with the perforation, and the top both ends of bottom frame all rotate under the perforation and install the tray pad.

Preferably, the double-disc looping machine still includes stop device, stop device includes the urceolus, the internally mounted of urceolus has interior post, there is the hydraulic pressure post between the top of interior post and the urceolus, the outside cover in top of urceolus is equipped with the round gear, interior post setting is directly over fenestrate, first hydro-cylinder is installed directly over the urceolus to the upper portion frame, the roof that the flexible end of first hydro-cylinder bottom runs through the upper portion frame is connected with spacing post, the bottom of spacing post is rotated with the top of urceolus and is connected, the pressure disk is connected along the circumferencial direction in the edge of urceolus, the diameter of pressure disk is greater.

Preferably, walk the line mechanism and include the diaphragm, the diaphragm is close to the one end both sides of bottom frame and all rotates and install the leading wheel, and both sides are all rotated and are installed the depression bar about the other end, and leading wheel and depression bar can make the cable remove more smoothly.

Preferably, both sides of the end part of the mounting plate are rotatably connected with the positioning plate through hinges, and a base plate is arranged between the two clamping plates at the top of the other end of the mounting plate.

Preferably, the locating plate is far away from the one end top of bottom frame and is installed flexible post, and the flexible end and the end plate of hydraulic pressure post are connected, and the bottom and the bearing plate fixed connection of end plate, flexible post can drive the locating plate and remove.

Preferably, the slide rail is all installed along length direction in the top both sides of bearing plate, and the slider is all installed to the bottom both sides of locating plate, and slider slidable mounting is on the upper portion of slide rail, and when the locating plate removed, the slider of bottom removed along the slide rail, can play the effect of direction for the locating plate removes more stably.

Preferably, the looping machine comprises the following specific steps:

the method comprises the following steps: the first oil cylinder extends downwards to drive the outer cylinder to move downwards until the outer cylinder is abutted against the bearing plate; the inner column moves downwards under the driving of the hydraulic column, and the bottom of the inner column penetrates through the through hole and is abutted against the tray pad; the cable to be looped passes through the two pressure rods and the two guide wheels and is wound outside the inner column; an external driving motor drives the outer cylinder to rotate through a belt and a gear so as to drive the inner column to rotate; the cable is wound outside the inner column to form a coil; after the cable is wound into a coil, the inner column contracts upwards, is separated from the inside of the coil and enters the inside of the outer cylinder; the coil is placed on the upper part of the tray pad and waits to be taken away;

step two: when the coil needs to be taken away, the wire holding mechanism moves the coil; when the wire holding mechanism works, the electric telescopic column extends to push the positioning plate and the mounting plate to move towards the upper part of the bottom frame until the coil is positioned between the two clamping plates; the second oil cylinder contracts to drive the two support rods to rotate, so that the stress arms on the two sides are pulled to approach the middle part, the two clamping plates clamp the coil, and the coil is fixed by the two clamping plates; after the coil is clamped by the two clamping plates, the telescopic end of the third oil cylinder drives the push plate to move towards the compression roller until the push plate enters the lower part of the compression roller and is extruded by the compression roller, and then the mounting plate is pressed downwards to rotate around the hinge; the end of the clamp plate moves upward, thereby causing the coil to move upward and disengage from the tray pad; the electric telescopic column contracts to drive the clamping plates to be far away from the bottom frame, after the coil is separated from the upper part of the bottom frame, the push plate is separated from the lower part of the compression roller, the height of the coil is reduced, and the two clamping plates rotate and are far away from each other, so that the coil falls on the upper part of the base plate;

step three: after one coil is formed, in the moving process, the other inner column moves downwards to wind the cable, so that uninterrupted work is realized; when the coil at the other end needs to be taken away, the rotating disc rotates under the driving of the driving motor, the bearing plate is driven to rotate, the moving direction of the mounting plate is changed, and the two clamping plates clamp the coil at the other end.

The utility model has the advantages that:

1. through setting up winding displacement mechanism for the first hydro-cylinder downwardly extending in work drives urceolus downstream, until with the loading board butt. The inner column moves downwards under the driving of the hydraulic column, and the bottom of the inner column penetrates through the through hole and is abutted to the tray pad. The cable to be looped passes through the two pressure rods and the two guide wheels and is wound outside the inner column. An external driving motor drives the outer barrel to rotate through a belt and a gear, and then the inner column is driven to rotate. The cable is rapidly wound around the outside of the inner post to form a coil. The upper portion of coil receives the restriction of loading board for the height of coil can receive the restriction, can accord with the demand of using. After the cable is wound into a coil, the inner column contracts upwards, is separated from the inside of the coil and enters the inside of the outer cylinder. The coil is placed on top of the tray pad, awaiting removal.

2. Through setting up the mechanism of holding a thread for when the coil need take away, hold a thread mechanism and can remove the coil. When the wire holding mechanism works, the electric telescopic column extends to push the positioning plate and the mounting plate to move towards the upper part of the bottom frame until the coil is positioned between the two clamping plates. The second oil cylinder contracts to drive the two supporting rods to rotate, and further the stress arms on the two sides are pulled to be close to the middle portion, so that the coil is clamped by the two clamping plates, and the coil can be fixed by the two clamping plates. After the coil was cliied by two splint, the flexible end of third hydro-cylinder drives the push pedal and removes to the compression roller, and the below that enters into the compression roller until the push pedal receives the extrusion of compression roller, and then makes the mounting panel pressed down and rotates round the hinge. The end of the clamp plate moves upward, thereby moving the coil upward off the tray pad. The electronic flexible post shrink drives splint and keeps away from the bottom frame, and the coil breaks away from the back from the upper portion of bottom frame, and the push pedal breaks away from the below of compression roller, and the height of coil reduces, and two splint rotate and keep away from each other for the coil falls on the upper portion of backing plate, and convenient follow-up hoisting machinery is got the coil and is put. Rotation of the clamp plate enables adaptation to coils of different sizes.

3. Through setting up two interior posts for the efficiency of cable lopping obtains improving, and a coil shaping back, at the in-process that removes, the normal winding lopping of cable can be continued to another interior post, can realize incessant work. When the coil of the other end needs to be taken away simultaneously, at first the rolling disc rotates under the drive of driving motor, and then drives the bearing plate and rotates, and then makes the direction that the mounting panel removed receive the change, makes things convenient for two splint to press from both sides the other end coil and gets.

Drawings

In order to facilitate understanding for those skilled in the art, the present invention will be further described with reference to the accompanying drawings.

Fig. 1 is a schematic view of the overall structure of the present invention.

Fig. 2 is a schematic isometric view of fig. 1 according to the present invention.

Fig. 3 is a schematic structural view of the wire holding mechanism of the present invention.

Fig. 4 is a schematic view of the splint mounting structure of the present invention.

Fig. 5 is a schematic structural view of the limiting device of the present invention.

Fig. 6 is a schematic view of the inner structure of the outer barrel of the present invention.

Fig. 7 is a schematic diagram of the structure of the bearing plate of the present invention.

Fig. 8 is a schematic view of the wiring mechanism of the present invention.

In the figure: 1. a bottom frame; 2. a carrier plate; 3. a limiting device; 4. an upper frame; 5. a wiring mechanism; 6. a first cylinder; 7. a wire holding mechanism; 8. a base plate; 9. mounting a plate; 10. an end plate; 11. a bearing plate; 12. rotating the disc; 13. a support bar; 14. a pin shaft; 15. a splint; 16. a force-bearing arm; 17. a second cylinder; 18. a rotating shaft; 19. a compression roller; 20. pushing the plate; 21. a third oil cylinder; 22. a hinge; 23. a slider; 24. a slide rail; 25. a limiting column; 26. a gear; 27. an outer cylinder; 28. a platen; 29. an inner column; 30. a tray pad; 31. perforating; 32. a pressure lever; 33. a transverse plate; 34. a guide wheel.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.

Referring to fig. 1-8, a double-reel looping machine includes a bottom frame 1, an upper frame 4, a routing mechanism 5, a wire arranging mechanism and a wire holding mechanism 7, wherein the upper frame 4 is installed on the upper portion of the bottom frame 1, the routing mechanism 5 is installed on one side of the bottom frame 1, the wire arranging mechanism is installed on the top of the bottom frame 1, and the wire holding mechanism 7 is installed on the other side of the bottom frame 1;

the wire holding mechanism 7 comprises a supporting rod 13, a rotating disc 12 is installed at the top of the supporting rod 13, a bearing plate 11 is installed at the top of the rotating disc 12, a positioning plate is installed at one end, far away from the bottom frame 1, of the top of the bearing plate 11 in a sliding mode, a mounting plate 9 is connected to one end, facing the bottom frame 1, of the positioning plate in a rotating mode, a pressing roller 19 is installed at one end, close to the positioning plate, of the top of the mounting plate 9 in a rotating mode, a third oil cylinder 21 is installed at one end, close to the mounting plate 9, of the top of the positioning plate, the telescopic;

rotatable force-bearing arms 16 are respectively arranged at two sides of the other end of the top of the mounting plate 9, and arc-shaped clamping plates 15 are respectively connected to opposite side surfaces of one end, close to the bottom frame 1, of the two force-bearing arms 16; the other end of the force receiving arm 16 is rotatably connected with the mounting plate 9 through a rotating shaft 18, one opposite side of the middle of each of the two force receiving arms 16 is rotatably connected with a supporting rod through a pin shaft 14, one opposite end of each of the two supporting rods is rotatably mounted inside the support, one end of the support is connected with the telescopic end of the second oil cylinder 17, and the second oil cylinder 17 is mounted on the upper portion of the mounting plate 9.

As a technical optimization scheme of the utility model, winding displacement mechanism includes loading board 2, and loading board 2's bottom is connected with bottom frame 1's top through a plurality of montant, and loading board 2's both ends all run through and are provided with perforation 31, and bottom frame 1's top both ends all rotate under perforation 31 and install tray pad 30.

As the utility model discloses a technical optimization scheme, double plate lopping machine still includes stop device 3, stop device 3 includes urceolus 27, the internally mounted of urceolus 27 has interior post 29, there is the hydraulic pressure post between the top of interior post 29 and the urceolus 27, the outside cover in top of urceolus 27 is equipped with round gear 26, interior post 29 sets up directly over perforation 31, first hydro-cylinder 6 is installed directly over urceolus 27 to upper portion frame 4, the roof that the flexible end of first hydro-cylinder 6 bottom runs through upper portion frame 4 is connected with spacing post 25, the bottom of spacing post 25 is rotated with the top of urceolus 27 and is connected, pressure disk 28 is connected along the circumferencial direction at the edge of urceolus 27, the diameter of pressure disk 28 is greater than the diameter of perforation 31.

As a technical optimization scheme of the utility model, walk line mechanism 5 and include diaphragm 33, diaphragm 33 is close to the one end both sides of bottom frame 1 and all rotates and install leading wheel 34, and both sides all rotate about the other end and install depression bar 32.

As a technical optimization scheme of the utility model, the tip both sides of mounting panel 9 all are connected with the locating plate rotation through hinge 22, and backing plate 8 is installed at the other end top of mounting panel 9 between two splint 15.

As a technical optimization scheme of the utility model, the one end top that bottom frame 1 was kept away from to the locating plate is installed flexible post, and the flexible end and the tip board 10 of hydraulic pressure post are connected, the bottom and the 11 fixed connection of bearing plate of tip board 10.

As a technical optimization scheme of the utility model, slide rail 24 is all installed along length direction in the top both sides of bearing plate 11, and slider 23 is all installed to the bottom both sides of locating plate, and slider 23 slidable mounting is on slide rail 24's upper portion.

As a technical optimization scheme of the utility model, the concrete step that this lopping machine used includes:

the method comprises the following steps: the first oil cylinder 6 extends downwards to drive the outer cylinder 27 to move downwards until the outer cylinder abuts against the bearing plate 2; the inner column 29 moves downwards under the driving of the hydraulic column, and the bottom of the inner column 29 passes through the through hole 31 and abuts against the tray pad 30; the cable to be looped passes between the two pressure levers 32 and the two guide wheels 34 and is wound outside the inner column 29; an external driving motor drives the outer cylinder 27 to rotate through a belt and a gear 26, and further drives the inner column 29 to rotate; the cable is wound around the outside of the inner post 29 to form a coil; after the cable is wound into a coil, the inner post 29 is retracted upward, separated from the inside of the coil, and enters the inside of the outer cylinder 27; the coil is placed on the upper portion of the tray pad 30 to be taken away;

step two: when the coil needs to be taken away, the wire holding mechanism 7 moves the coil; when the wire holding mechanism 7 works, the electric telescopic column extends to push the positioning plate and the mounting plate 9 to move towards the upper part of the bottom frame 1 until the coil is positioned between the two clamping plates 15; the second oil cylinder 17 contracts to drive the two support rods to rotate, so that the stress arms 16 on the two sides are pulled to approach to the middle part, the two clamping plates 15 clamp the coil, and the two clamping plates 15 fix the coil; after the coil is clamped by the two clamping plates 15, the telescopic end of the third oil cylinder 21 drives the push plate 20 to move towards the compression roller 19 until the push plate 20 enters the lower part of the compression roller 19 and is extruded by the compression roller 19, so that the mounting plate 9 is pressed downwards to rotate around the hinge 22; the end of the clamp plate 15 moves upward, thereby moving the coil upward off the tray pad 30; the electric telescopic column contracts to drive the clamping plates 15 to be far away from the bottom frame 1, after the coil is separated from the upper part of the bottom frame 1, the push plate 20 is separated from the lower part of the compression roller 19, the height of the coil is reduced, and the two clamping plates 15 rotate and are far away from each other, so that the coil falls on the upper part of the base plate 8;

step three: after one coil is formed, in the moving process, the other inner column 29 moves downwards to wind the cable, so that uninterrupted work is realized; when a coil at the other end needs to be taken away, firstly, the rotating disc 12 is driven by the driving motor to rotate, and then the bearing plate 11 is driven to rotate, so that the moving direction of the mounting plate 9 is changed, and the coil at the other end is clamped by the two clamping plates 15.

The utility model discloses when using, first hydro-cylinder 6 extends downwards, drives urceolus 27 downstream, until with 2 butts of loading board. The inner post 29 is moved downwardly by the hydraulic post and the bottom of the inner post 29 passes through the aperture 31 and abuts the pallet pad 30. The cable to be looped passes between the two struts 32 and the two guide wheels 34 and is wound around the outside of the inner post 29. An external drive motor rotates the outer cylinder 27 and thus the inner post 29 via a belt and gear 26. The cable is rapidly wound around the outside of the inner post 29 to form a coil. The upper part of the coil is limited by the bearing plate 2, so that the height of the coil can be limited and the use requirement can be met. After the cable is wound into a coil, the inner post 29 is retracted upward, and is separated from the inside of the coil and enters the inside of the outer cylinder 27. The coil is placed on top of the tray pad 30, awaiting removal.

When the coil needs to be taken away, the wire holding mechanism 7 moves the coil. When the wire holding mechanism 7 works, the electric telescopic column extends to push the positioning plate and the mounting plate 9 to move towards the upper part of the bottom frame 1 until the coil is positioned between the two clamping plates 15. The second oil cylinder 17 contracts to drive the two support rods to rotate, and further the stress arms 16 on the two sides are pulled to be close to the middle part, so that the coil is clamped by the two clamping plates 15, and the coil can be fixed by the two clamping plates 15. After the coil is clamped by the two clamping plates 15, the telescopic end of the third oil cylinder 21 drives the push plate 20 to move towards the compression roller 19 until the push plate 20 enters the lower part of the compression roller 19 and is extruded by the compression roller 19, so that the mounting plate 9 is pressed downwards to rotate around the hinge 22. The end of the clamp plate 15 moves upward causing the coil to move upward off of the tray pad 30. Electronic flexible post shrink drives splint 15 and keeps away from bottom frame 1, and the coil breaks away from the back from the upper portion of bottom frame 1, and push pedal 20 breaks away from the below of compression roller 19, and the height of coil reduces, and two splint 15 rotate and keep away from each other for the coil falls on the upper portion of backing plate 8, makes things convenient for follow-up hoisting machinery to get the coil and puts. Rotation of the clamp plate 15 enables different sizes of coils to be accommodated.

The two inner columns 29 improve the cable looping efficiency, after one coil is formed, the other inner column 29 can continue to wind and loop the cable normally in the moving process, and uninterrupted work can be realized. When coils at the other end need to be taken away, the rotating disc 12 is driven by the driving motor to rotate, so that the bearing plate 11 is driven to rotate, the moving direction of the mounting plate 9 is changed, and the coils at the other end can be clamped by the two clamping plates 15 conveniently.

The preferred embodiments of the present invention disclosed above are intended only to help illustrate the present invention. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and its practical applications, to thereby enable others skilled in the art to best understand the invention for and utilize the invention. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A double-disc looping machine comprises a bottom frame (1), an upper frame (4), a wiring mechanism (5), a wire arranging mechanism and a wire holding mechanism (7), wherein the upper frame (4) is arranged on the upper portion of the bottom frame (1), and is characterized in that the wiring mechanism (5) is arranged on one side of the bottom frame (1), the wire arranging mechanism is arranged on the top of the bottom frame (1), and the wire holding mechanism (7) is arranged on the other side of the bottom frame (1);

the wire holding mechanism (7) comprises a supporting rod (13), a rotating disc (12) is installed at the top of the supporting rod (13), a bearing plate (11) is installed at the top of the rotating disc (12), a positioning plate is installed at one end, far away from a bottom frame (1), of the top of the bearing plate (11) in a sliding mode, a mounting plate (9) is connected to one end, facing the bottom frame (1), of the positioning plate in a rotating mode, a pressing roller (19) is installed at one end, close to the positioning plate, of the top of the mounting plate (9), a third oil cylinder (21) is installed at one end, close to the mounting plate (9), of the top of the positioning plate, the telescopic end of the third oil cylinder (21) is connected with a;

rotatable force-bearing arms (16) are respectively arranged on two sides of the other end of the top of the mounting plate (9), and arc-shaped clamping plates (15) are respectively connected to opposite side surfaces of one end, close to the bottom frame (1), of the two force-bearing arms (16); the other end of the force receiving arm (16) is rotatably connected with the mounting plate (9) through a rotating shaft (18), one opposite sides of the middle parts of the two force receiving arms (16) are rotatably connected with supporting rods through pin shafts (14), one opposite ends of the two supporting rods are rotatably mounted in the support, one end of the support is connected with the telescopic end of a second oil cylinder (17), and the second oil cylinder (17) is mounted on the upper part of the mounting plate (9).

2. The double-disk looping machine according to claim 1, characterized in that the winding displacement mechanism comprises a bearing plate (2), the bottom of the bearing plate (2) is connected with the top of the bottom frame (1) through a plurality of vertical rods, through holes (31) are formed in both ends of the bearing plate (2), and tray pads (30) are rotatably mounted on both ends of the top of the bottom frame (1) under the through holes (31).

3. A double-disc looping machine according to claim 1, characterized in that it also comprises limiting means (3), stop device (3) include urceolus (27), the internally mounted of urceolus (27) has interior post (29), there is the hydraulic column between the top of interior post (29) and urceolus (27), the outside cover in top of urceolus (27) is equipped with round gear (26), interior post (29) set up directly over perforation (31), first hydro-cylinder (6) are installed directly over urceolus (27) in upper portion frame (4), the roof that the flexible end of first hydro-cylinder (6) bottom runs through upper portion frame (4) is connected with spacing post (25), the bottom of spacing post (25) is rotated with the top of urceolus (27) and is connected, pressure disk (28) is connected along the circumferencial direction in the edge of urceolus (27), the diameter of pressure disk (28) is greater than the diameter of perforation (31).

4. The double-disc looping machine according to claim 1, characterized in that the routing mechanism (5) comprises a transverse plate (33), wherein two sides of one end of the transverse plate (33) close to the bottom frame (1) are rotatably provided with guide wheels (34), and the upper side and the lower side of the other end are rotatably provided with pressing rods (32).

5. A double-disc looping machine according to claim 1, characterized in that both sides of the end of the mounting plate (9) are rotatably connected with the positioning plate through hinges (22), and a backing plate (8) is mounted between the two clamping plates (15) at the top of the other end of the mounting plate (9).

6. A double-disc looping machine according to claim 1, characterized in that the top of the end of the positioning plate far away from the bottom frame (1) is provided with a telescopic column, the telescopic end of the hydraulic column is connected with the end plate (10), and the bottom of the end plate (10) is fixedly connected with the bearing plate (11).

7. A double-disc looping machine according to claim 1, characterized in that, slide rails (24) are installed on both sides of the top of the bearing plate (11) along the length direction, slide blocks (23) are installed on both sides of the bottom of the positioning plate, and the slide blocks (23) are slidably installed on the upper portions of the slide rails (24).