CN214601602U

CN214601602U - Shield constructs section of jurisdiction framework of steel reinforcement with auxiliary workbench that bends

Info

Publication number: CN214601602U
Application number: CN202023220473.2U
Authority: CN
Inventors: 张中民; 石兰军; 张学垚; 胡静飞
Original assignee: Luoyang Shuangxian Cement Products Co ltd
Current assignee: Luoyang Shuangxian Cement Products Co ltd
Priority date: 2020-12-28
Filing date: 2020-12-28
Publication date: 2021-11-05
Anticipated expiration: 2030-12-28

Abstract

The embodiment of the utility model provides a shield constructs section of jurisdiction framework is with auxiliary workbench that bends relates to building material production technical field, concretely relates to shield, include the base, hold chamber, mounting groove and moving mechanism, still include with first placement mechanism, reference column, second placement mechanism and first actuating mechanism, be used for making the arc track that the connecting rod passes through. The utility model discloses beneficial effect does: the utility model discloses moving mechanism's setting is convenient for remove the base to different positions, removes to suitable position after, and in the moving mechanism withdrawal mounting groove, make base and ground contact firm, the setting of first placing mechanism and second placing mechanism is convenient for be applicable to the reinforcing bar of different diameters, and application scope is wide, and actuating mechanism's setting is convenient for bend different angles, convenient operation with shield structure section of jurisdiction steel framework.

Description

Shield constructs section of jurisdiction framework of steel reinforcement with auxiliary workbench that bends

Technical Field

The utility model relates to a building material production field technical field, concretely relates to shield constructs section of jurisdiction framework of steel reinforcement with auxiliary workbench that bends.

Background

With the continuous development of city construction scale, the development of subway and city underground space and the reconstruction of city water conservancy system in each big city in China are started successively, wherein the shield construction technology is a construction method which is widely used for underground tunnel construction, shield segments are the permanent lining structure of the shield tunnel, the quality of the shield segments is directly related to the whole quality and safety of the tunnel, and the waterproof performance and the durability of the tunnel are influenced, the shield segments are usually connected through a steel reinforcement framework, the steel reinforcement of the shield segment steel reinforcement framework needs to be bent through a processing platform and processed in the next step in the processing process, the auxiliary workbench for bending the existing shield segment steel reinforcement framework is inconvenient to move, if rollers are arranged at the bottom, the contact between the base and the ground is not firm, the phenomenon that the base is easy to move in the processing process, most of the traditional workbench for rolling hook segment steel reinforcement can only bend steel reinforcements with one diameter, the reinforcing steel bars with different diameters can not be bent, the auxiliary bending workbench for the shield segment steel bar framework is required to perform steel bar operation on the reinforcing steel bars with different diameters, the manufacturing cost is increased, and the production efficiency is reduced.

SUMMERY OF THE UTILITY MODEL

In order to solve the problem, the embodiment of the utility model provides a shield constructs section of jurisdiction framework of steel reinforcement with auxiliary workbench that bends.

The purpose of the utility model is realized like this:

the utility model provides a shield constructs section of jurisdiction framework of steel reinforcement with auxiliary workbench that bends, includes the base, is located hold the chamber in the base, be located the lower surface of base and the decurrent mounting groove of opening, be located moving mechanism in the mounting groove still include with the last fixed surface of base connect and be used for placing the first placement mechanism of reinforcing bar, be located the left reference column of first placement mechanism, be located the reference column left side just is used for placing the second placement mechanism of the reinforcing bar other end, with the bottom of second placement mechanism is passed through the connecting rod and is connected and be used for making the second placement mechanism is the first actuating mechanism of circular arc pivoted, is used for making the arc track that the connecting rod passes through.

Preferably, the first placing mechanism includes a first placing block fixedly connected to the upper surface of the base, a first placing groove located on the upper surface of the first placing block and having an upward opening, a first adjusting mechanism for adjusting the width of the first placing groove, and a scale value located on the upper surface of the first placing block and arranged along the length direction of the first placing groove, the number of the first adjusting mechanisms is two, the two first adjusting mechanisms are symmetrically arranged, and the two first adjusting mechanisms are respectively located on the front side surface and the back side surface of the first placing groove.

Preferably, the first adjusting mechanism comprises a first adjusting plate located in the first placing groove, a first adjusting screw connected with the front side surface of the first adjusting plate through a first bearing, and a first limiting rod used for limiting the rotation of the first adjusting plate, and the front end of the first adjusting screw penetrates through the front side surface of the first placing groove and is in threaded connection with the first placing block.

Preferably, the first limiting rod is a telescopic rod, the first limiting rod is provided with at least two limiting rods, the number of the limiting rods is at least two, the first limiting rod is arranged along the length direction of the first adjusting plate, and the front end and the rear end of the first limiting rod are respectively fixedly connected with the front side face of the first adjusting plate and the front side face of the first placing groove.

Preferably, the second placing mechanism comprises a second placing block fixedly connected with the top of the connecting rod, a second placing groove located on the upper surface of the second placing block and having an upward opening, and two second adjusting mechanisms used for adjusting the width of the second placing groove, the two second adjusting mechanisms are symmetrically arranged, and the two second adjusting mechanisms are respectively located on the front side and the rear side of the second placing groove.

Preferably, the second adjusting mechanism comprises a second adjusting plate located in the second placing groove, a second adjusting screw connected with the front side surface of the second adjusting plate through a second bearing, and a second limiting rod used for limiting rotation of the second adjusting plate, and the front end of the second adjusting screw penetrates through the front side surface of the second placing groove and is in threaded connection with the second placing block.

Preferably, the second limiting rod is a telescopic rod, the second limiting rod is provided with at least two limiting rods, the number of the at least two limiting rods is at least two, the second limiting rod is arranged along the length direction of the second adjusting plate, and the front end and the rear end of the second limiting rod are respectively fixedly connected with the front side face of the second adjusting plate and the front side face of the second placing groove.

Preferably, the first driving mechanism comprises a first connecting plate fixedly connected with the driving motor and the output end of the driving motor, the bottom of the connecting plate is fixedly connected with the upper surface of the connecting plate, and the output end of the driving motor is located under the positioning column.

Preferably, the moving mechanism include with the lateral wall fixed connection's of mounting groove second actuating mechanism, with the drive mechanism that second actuating mechanism connects, with drive mechanism swing joint's gyro wheel, drive mechanism's both ends respectively through first supporting mechanism and second supporting mechanism with the top of mounting groove is connected, the center pin of gyro wheel through first connecting rod with drive mechanism swing joint, the center pin of gyro wheel through the second connecting rod with first supporting mechanism swing joint.

Preferably, the transmission mechanism comprises a screw rod connected with the second driving mechanism, a slider sleeved on the screw rod and in threaded connection with the screw rod, a connecting plate is arranged at the bottom of the slider, the top of the first connecting rod is movably connected with the connecting plate through a pin shaft, the bottom of the first connecting rod is movably connected with the central shaft of the roller through a pin shaft, the second driving mechanism comprises a motor, the right side surface of the motor is fixedly connected with the right side surface of the mounting groove through a bolt assembly, the output end of the motor is fixedly connected with the right end of the screw rod, the first supporting mechanism comprises a first supporting block fixedly connected with the top of the mounting groove, a first through hole positioned on the first supporting block and enabling the screw rod to pass through, a groove positioned on the front side surface of the first supporting block, and the right end of the second connecting rod is movably connected with the rear side surface of the groove through a pin shaft, the left end of the second connecting rod is movably connected with the central shaft of the roller through a pin shaft, the inner surface of the first through hole is connected with the outer surface of the screw rod through a bearing, the second supporting mechanism comprises a second supporting block, a second through hole is formed in the right side surface of the second supporting block, and the inner surface of the second through hole is connected with the outer surface of the screw rod through a bearing.

The utility model discloses beneficial effect does: the utility model discloses moving mechanism's setting is convenient for remove the base to different positions, removes to suitable position after, and in the moving mechanism withdrawal mounting groove, make base and ground contact firm, the setting of first placing mechanism and second placing mechanism is convenient for be applicable to the reinforcing bar of different diameters, and application scope is wide, and actuating mechanism's setting is convenient for bend different angles, convenient operation with shield structure section of jurisdiction steel framework.

Drawings

Fig. 1 is a schematic structural view of the present invention;

FIG. 2 is a top view of FIG. 1;

FIG. 3 is an enlarged schematic view of portion A;

in the figure: the base 1, hold chamber 2, mounting groove 3, moving mechanism 4, first mechanism 5 of placing, reference column 6, second mechanism 7 of placing, connecting rod 8, first connecting plate 9, driving motor 10, controller 11, backup pad 12, arc track 13, first piece 14 of placing, first standing groove 15, first adjustment mechanism 16, first regulating plate 17, first adjusting screw 18, first bearing 19, first gag lever post 20, second piece 21 of placing, second standing groove 22, second adjustment mechanism 23, second regulating plate 24, second adjusting screw 25, second bearing 26, second gag lever post 27, first supporting mechanism 28, second supporting mechanism 29, motor 30, screw 31, mounting groove 32, slider 33, first connecting rod 34, gyro wheel 35, second connecting rod 36.

Detailed Description

Preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only for explaining the technical principle of the present invention, and are not intended to limit the scope of the present invention.

Example 1:

as shown in fig. 1 and 2, a bending auxiliary workbench for a shield segment steel reinforcement framework comprises a base 1, a containing cavity 2 located in the base 1, a mounting groove 3 located on the lower surface of the base 1 and having a downward opening, a moving mechanism 4 located in the mounting groove 3, a first placing mechanism 5 fixedly connected with the upper surface of the base 1 and used for placing steel reinforcements, a positioning column 6 located on the left side of the first placing mechanism 5, a second placing mechanism 7 located on the left side of the positioning column 6 and used for placing the other end of the steel reinforcements, a first driving mechanism connected with the bottom of the second placing mechanism 7 through a connecting rod 8 and used for enabling the second placing mechanism 7 to rotate in an arc shape, an arc-shaped track 13 used for enabling the connecting rod 8 to pass through, wherein the first placing mechanism 5 and the second placing mechanism 7 are on the same straight line, the first placing mechanism 5 is used for containing the right end of the steel reinforcements, the second placing mechanism 7 is used for placing the left end of the steel bar, the first driving mechanism drives the second placing mechanism 7 to rotate in a circular arc mode, the second placing mechanism 7 drives the left end of the steel bar and bends a certain angle through the positioning column 6 supporting points, and operation is convenient.

The first placing mechanism 5 comprises a first placing block 14 fixedly connected with the upper surface of the base 1, a first placing groove 15 which is positioned on the upper surface of the first placing block 14 and has an upward opening, a first adjusting mechanism 16 for adjusting the width of the first placing groove 15, scale values which are positioned on the upper surface of the first placing block 14 and are arranged along the length direction of the first placing groove 15, the setting of the scale values can facilitate the measurement of the bending position of the reinforcing steel bars, reduce the requirement of repeated measurement of a scale by workers, the first adjusting mechanism 16 is provided with two, the two first adjusting mechanisms 16 are symmetrically arranged, the two first adjusting mechanisms 16 are respectively positioned on the front side surface and the rear side surface of the first placing groove 15, facilitate the fixing of the reinforcing steel bars with different diameters and the inside of the first placing groove 15, the application range is wide, and the combined action of the two first adjusting mechanisms 16, and fixing the steel bars. The first adjusting mechanism 16 comprises a first adjusting plate 17 located in the first placing groove 15, a first adjusting screw 18 connected with the first bearing 19 and a first limiting rod 20 used for limiting rotation of the first adjusting plate 17, wherein the front side surface of the first adjusting plate 17 passes through the first adjusting screw 18 connected with the first bearing 19, the front end of the first adjusting screw 18 penetrates through the front side surface of the first placing groove 15 and is in threaded connection with the first placing block 14, the front end of the first adjusting screw 18 is located at the front end of the first placing block 14, and when a steel bar needs to be clamped tightly, the first adjusting screws 18 on the front side and the rear side are screwed, so that the two first adjusting plates 17 are abutted against the steel bar and clamp the steel bar tightly. First gag lever post 20 is the telescopic link, first gag lever post 20 sets up two, two first gag lever post 20 is followed the length direction of first regulating plate 17 sets up, the front end and the rear end of first gag lever post 20 respectively with the leading flank of first regulating plate 17 with the leading flank of first standing groove 15 passes through welded fastening and connects, and two first gag lever posts 20 are fixed with both ends about first standing groove 15 respectively.

The second placing mechanism 7 comprises a second placing block 21 fixedly connected with the top of the connecting rod 8, a second placing groove 22 with an upward opening and located on the upper surface of the second placing block 21, and a second adjusting mechanism 23 for adjusting the width of the second placing groove 22, wherein the second adjusting mechanism 23 is provided with two second adjusting mechanisms 23, the two second adjusting mechanisms 23 are symmetrically arranged, the two second adjusting mechanisms 23 are respectively located on the front side surface and the rear side surface of the second placing groove 22, the two second adjusting mechanisms 23 are convenient for fixing reinforcing steel bars with different diameters with the second placing groove 22, and the application range is wide. The second adjusting mechanism 23 comprises a second adjusting plate 24 positioned in the second placing groove 22, a second adjusting screw 25 connected with the second bearing 26 and a second limiting rod 27 used for limiting the rotation of the second adjusting plate 24, wherein the front side surface of the second adjusting plate 24 passes through the front side surface of the second placing groove 22 and is in threaded connection with the second placing block 21, the front end of the second adjusting screw 25 is positioned at the front end of the second placing block 21, and when the reinforcing steel bar needs to be clamped tightly, the second adjusting screws 25 on the front side and the rear side are screwed, so that the two first adjusting plates 24 are abutted against the reinforcing steel bar and the reinforcing steel bar is clamped tightly. The second limiting rod 27 is a telescopic rod, the second limiting rod 27 is provided with two limiting rods, the second limiting rod 27 is arranged along the length direction of the second adjusting plate 24, and the front end and the rear end of the second limiting rod 27 are respectively connected with the front side surface of the second adjusting plate 24 and the front side surface of the second placing groove 22 through welding and fixing.

First actuating mechanism include with driving motor 10, with driving motor 10's output fixed connection's first connecting plate 9, the bottom of connecting rod 8 with first connecting plate 9's last fixed surface is connected, driving motor 10's output is located under the reference column, driving

motor

10 and 11 electric connection of controller, controller control driving motor 10's turned angle to make the reinforcing bar bend different angles, and the angle of bending is accurate, controller 11 adopts siemens s7-200PLC controller, and controller 11 and driving motor 10 are all fixed with backup pad 12 through bolt assembly, and backup pad 12 is located and holds 2, and driving motor 10 and controller 11 are located and hold 2.

Example 2:

motor

As shown in fig. 3, the moving mechanism 4 includes a second driving mechanism fixedly connected to the sidewall of the mounting groove 3, a transmission mechanism connected to the second driving mechanism, and a roller movably connected to the transmission mechanism, two ends of the transmission mechanism are respectively connected to the top of the mounting groove 3 through a first supporting mechanism 28 and a second supporting mechanism 29, a central axis of the roller 35 is movably connected to the transmission mechanism through a first connecting rod 34, the central axis of the roller 35 is movably connected to the first supporting mechanism 28 through a second connecting rod 36, the driving mechanism drives the transmission mechanism to transmit, the transmission mechanism drives the roller 35 to move rightward or leftward, the transmission mechanism is driven by the driving mechanism to move, the first connecting member is driven to move along the transmission mechanism, so that an included angle between the first connecting rod 34 and the second connecting rod 36 is changed, and a vertical distance between the roller 35 and the transmission mechanism is also changed, the contraction of the roller 35 is realized, two ends of the transmission mechanism are respectively connected with the top of the mounting groove 3 through the first supporting mechanism 28 and the second supporting mechanism, the central shaft of the roller 35 is connected with the transmission mechanism through the first connecting rod 34, and the central shaft of the roller 35 is connected with the first supporting mechanism 28 through the second connecting rod 36. The transmission mechanism comprises a screw 31 and a slider 33, the screw 31 and the slider 33 are connected with the second driving mechanism, the slider 33 is connected with the screw 31 in a sleeved mode, the bottom of the slider 33 is provided with a connecting plate, the top of a first connecting rod 34 is movably connected with the connecting plate through a pin shaft, the bottom of the first connecting rod 34 is movably connected with a central shaft of a roller 35 through a pin shaft, the second driving mechanism comprises a motor 30, the right side surface of the motor 30 is fixedly connected with the right side surface of the mounting groove 3 through a bolt component, the output end of the motor 30 is fixedly connected with the right end of the screw 31, the first supporting mechanism 28 comprises a first supporting block fixedly connected with the top of the mounting groove 3, a first through hole, which is positioned on the first supporting block and is used for the screw 31 to pass through, and a groove, which is positioned on the front side surface of the first supporting block, the right end of the second connecting rod 36 is movably connected with the rear side surface of the groove through a pin shaft, the left end of the second connecting rod 36 is movably connected with the central shaft of the roller 35 through a pin shaft, the inner surface of the first through hole is connected with the outer surface of the screw 31 through a bearing, the second supporting mechanism 29 comprises a second supporting block, the right side surface of the second supporting block is provided with a second through hole, the inner surface of the second through hole is connected with the outer surface of the screw through a bearing, when the base 1 needs to be moved, the motor 30 is started, the motor 30 drives the screw 7 to rotate clockwise, the screw 31 rotates to drive the sliding block 33 to move rightwards, the sliding block 33 drives the roller 35 to move rightwards, at the moment, when the bottom of the roller 35 is positioned outside the mounting groove 3, the motor 30 can be stopped, the base 1 can be pushed, and the base 1 reaches a set position, starting motor 30 makes motor 30 drive screw rod 31 anticlockwise rotation, then screw rod 31 rotates and drives slider 33 and remove left, then slider 33 drives gyro wheel 35 and removes left, is located the inside of mounting groove 3 when the bottom of gyro wheel 35, makes motor 30 stop work, and the bottom and the ground contact of base 1 have guaranteed the steady motionless of workstation.

The utility model discloses moving mechanism's setting is convenient for remove the base to different positions, removes to suitable position after, and in the moving mechanism withdrawal mounting groove, make base and ground contact firm, the setting of first placing mechanism and second placing mechanism is convenient for be applicable to the reinforcing bar of different diameters, and application scope is wide, and actuating mechanism's setting is convenient for bend different angles, convenient operation with shield structure section of jurisdiction steel framework.

It should be noted that in the description of the present invention, the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicating the directions or positional relationships are based on the directions or positional relationships shown in the drawings, which are only for convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

Furthermore, it should be noted that, in the description of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

The terms "comprises," "comprising," or any other similar term are intended to cover a non-exclusive inclusion, such that a process, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, article, or apparatus.

So far, the technical solution of the present invention has been described with reference to the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, a person skilled in the art can make equivalent changes or substitutions to the related technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

Claims

1. The utility model provides a shield constructs section of jurisdiction framework of steel reinforcement with auxiliary workbench that bends, includes the base, is located holding the chamber in the base, being located the lower surface of base and the decurrent mounting groove of opening, being located moving mechanism in the mounting groove, its characterized in that: still include with the last fixed surface of base connect and be used for placing the first mechanism of placing of reinforcing bar, be located first left reference column of mechanism of placing, be located the reference column left side just is used for placing the second placement mechanism of the reinforcing bar other end, with the bottom of second placement mechanism is passed through the connecting rod and is connected and be used for making the second placement mechanism is the first actuating mechanism of circular arc pivoted, is used for making the arc track that the connecting rod passes through.

2. The shield constructs section of jurisdiction framework of steel reinforcement and uses auxiliary workbench that bends of claim 1, characterized in that: the first placing mechanism comprises a first placing block fixedly connected with the upper surface of the base, a first placing groove, a first adjusting mechanism and a scale value, wherein the first placing groove is located on the upper surface of the first placing block and is provided with an upward opening, the first adjusting mechanism is used for adjusting the width of the first placing groove, the scale value is located on the upper surface of the first placing block and is arranged along the length direction of the first placing groove, the number of the first adjusting mechanisms is two, the two first adjusting mechanisms are symmetrically arranged, and the two first adjusting mechanisms are respectively located on the front side surface and the rear side surface of the first placing groove.

3. The shield constructs section of jurisdiction framework of steel reinforcement and uses auxiliary workbench that bends of claim 2, characterized in that: the first adjusting mechanism comprises a first adjusting plate, a first adjusting screw and a first limiting rod, wherein the first adjusting plate is located in the first placing groove, the first adjusting screw is connected with the front side face of the first adjusting plate through a first bearing, the first limiting rod is used for limiting the rotation of the first adjusting plate, and the front end of the first adjusting screw penetrates through the front side face of the first placing groove and is in threaded connection with the first placing block.

4. The shield constructs section of jurisdiction framework of steel reinforcement and uses auxiliary workbench that bends of claim 3, characterized in that: the first limiting rod is a telescopic rod, the first limiting rod is provided with at least two limiting rods, the number of the limiting rods is at least two, the first limiting rod is arranged along the length direction of the first adjusting plate, and the front end and the rear end of the first limiting rod are respectively fixedly connected with the front side face of the first adjusting plate and the front side face of the first placing groove.

5. The shield constructs section of jurisdiction framework of steel reinforcement and uses auxiliary workbench that bends of claim 2, characterized in that: the second placing mechanism comprises a second placing block fixedly connected with the top of the connecting rod, a second placing groove located on the upper surface of the second placing block and provided with an upward opening, and a second adjusting mechanism used for adjusting the width of the second placing groove, the number of the second adjusting mechanisms is two, the two second adjusting mechanisms are symmetrically arranged, and the two second adjusting mechanisms are respectively located on the front side face and the rear side face of the second placing groove.

6. The shield constructs section of jurisdiction framework of steel reinforcement and uses auxiliary workbench that bends of claim 5, characterized in that: the second adjusting mechanism comprises a second adjusting plate, a second adjusting screw and a second limiting rod, wherein the second adjusting plate is located in the second placing groove, the second adjusting screw is connected with the front side face of the second adjusting plate through a second bearing, the second limiting rod is used for limiting the second adjusting plate to rotate, and the front end of the second adjusting screw penetrates through the front side face of the second placing groove and is in threaded connection with the second placing block.

7. The shield constructs section of jurisdiction framework of steel reinforcement and uses auxiliary workbench that bends of claim 6, characterized in that: the second limiting rod is a telescopic rod, the second limiting rod is provided with at least two limiting rods, the number of the limiting rods is at least two, the second limiting rods are arranged along the length direction of the second adjusting plate, and the front end and the rear end of each second limiting rod are respectively fixedly connected with the front side face of the second adjusting plate and the front side face of the second placing groove.

8. The shield constructs section of jurisdiction framework of steel reinforcement and uses auxiliary workbench that bends of claim 1, characterized in that: the first driving mechanism comprises a first connecting plate fixedly connected with the output end of the driving motor, the bottom of the connecting plate is fixedly connected with the upper surface of the connecting plate, and the output end of the driving motor is located under the positioning column.

9. The shield constructs section of jurisdiction framework of steel reinforcement and uses auxiliary workbench that bends of claim 1, characterized in that: moving mechanism include with the lateral wall fixed connection's of mounting groove second actuating mechanism, with the drive mechanism that second actuating mechanism connects, with drive mechanism swing joint's gyro wheel, drive mechanism's both ends respectively through first supporting mechanism and second supporting mechanism with the top of mounting groove is connected, the center pin of gyro wheel through first connecting rod with drive mechanism swing joint, the center pin of gyro wheel pass through the second connecting rod with first supporting mechanism swing joint.

10. The shield constructs section of jurisdiction framework of steel reinforcement and uses auxiliary workbench that bends of claim 9, characterized in that: the transmission mechanism comprises a screw rod connected with the second driving mechanism, a slider sleeved on the screw rod and in threaded connection with the screw rod, a connecting plate is arranged at the bottom of the slider, the top of a first connecting rod is movably connected with the connecting plate through a pin shaft, the bottom of the first connecting rod is movably connected with a central shaft of the roller through a pin shaft, the second driving mechanism comprises a motor, the right side surface of the motor is fixedly connected with the right side surface of the mounting groove through a bolt component, the output end of the motor is fixedly connected with the right end of the screw rod, the first supporting mechanism comprises a first supporting block fixedly connected with the top of the mounting groove, a first through hole positioned on the first supporting block and enabling the screw rod to pass through, a groove positioned on the front side surface of the first supporting block, and the right end of the second connecting rod is movably connected with the rear side surface of the groove through a pin shaft, the left end of the second connecting rod is movably connected with the central shaft of the roller through a pin shaft, the inner surface of the first through hole is connected with the outer surface of the screw rod through a bearing, the second supporting mechanism comprises a second supporting block, a second through hole is formed in the right side surface of the second supporting block, and the inner surface of the second through hole is connected with the outer surface of the screw rod through a bearing.