CN219859234U - Deviation-preventing conveying mechanism - Google Patents

Abstract

The utility model discloses an anti-deviation conveying mechanism, which belongs to the technical field of conveying devices and comprises a bottom plate, wherein two mounting frames are fixedly arranged on the upper surface of the bottom plate, two conveying rollers are rotatably arranged in the two mounting frames, the outer surfaces of the two conveying rollers are sleeved with a same conveying belt, belt pulleys are sleeved on the outer surfaces of the two conveying rollers on the left side, the two belt pulleys are connected through belt transmission, a motor is fixedly arranged on the side surface of one mounting frame, the motor can drive the conveying rollers to intermittently rotate through the intermittent rotating mechanism, the conveying rollers can drive conveying to synchronously move through the intermittent rotating mechanism, so that conveying of oil bottles can be realized, and the belt pulleys and the belt can drive the conveying rollers on the two sides to synchronously rotate through the belt pulleys, so that the two conveying belts can be driven to synchronously move, and the synchronous conveying of the two conveying belts can be realized.

Description

Deviation-preventing conveying mechanism

Technical Field

The utility model relates to the technical field of conveying devices, in particular to an anti-deviation conveying mechanism.

Background

An oil bottle, a storage package for storing oil substances, an edible oil=plastic bottle is widely used as a packaging container, and a handle is installed on the oil bottle since the plastic oil bottle is manually extracted at the time of production, marketing and use. The combination of the existing plastic bottle for containing edible oil and the handle is usually that the plastic bottle processed by injection, drawing and blowing is firstly made of polyester raw materials such as PET and the like, and the handle is embedded in the outer wall of the bottle body, so that the strength and the quality of the oil bottle are guaranteed, the oil bottle is convenient to use, the operation (pouring) of one hand is stable, and a conveying mechanism is commonly used for conveying the oil bottle in the production process.

The limiting mechanism for limiting the oil bottle is lacked when the oil bottle is conveyed, so that the problem that the position of the oil bottle is easy to move and deviate is solved, subsequent equipment cannot be aligned with the oil bottle, and the subsequent normal operation of other works such as capping the oil bottle can be influenced.

Disclosure of Invention

The anti-deviation conveying mechanism solves the problem that when an oil bottle is conveyed, a limiting mechanism for limiting the oil bottle is lacked, so that the position of the oil bottle is easy to deviate in movement, further the problem that subsequent equipment cannot be aligned with the oil bottle, and the subsequent normal operation of other works such as capping the oil bottle is affected.

In order to achieve the above purpose, the present utility model adopts the following technical scheme: the utility model provides an anti-bias conveying mechanism, includes the bottom plate, the upper surface fixed mounting of bottom plate has two mounting brackets, two equal rotation installs two transfer rollers and the surface cover of two transfer rollers in the mounting bracket is equipped with same conveyer belt, and wherein left two the surface of transfer roller all overlaps and is equipped with the belt pulley, two through belt drive connection between the belt pulley, one of them the side fixed mounting of mounting bracket has the motor, be provided with on the motor and be used for driving transfer roller intermittent type pivoted intermittent type rotary mechanism, the front side the fixed feed opening that has offered of side of mounting bracket and feed opening department is provided with the movable plate, the front side the mounting panel that two cooperation movable plates used of side fixed mounting of mounting bracket, the movable plate articulates on one of them mounting panel, and the front side the side tilting mounting of mounting bracket has the unloading board that the cooperation movable plate used, the other end of unloading board extends to the conveyer belt top of rear side, and sets up the opening that the cooperation unloading board used on the mounting bracket, the front side be provided with two anti-bias plate and two guide plates and the fixed mounting bracket have the fixed mounting plate, the guide plate has the fixed mounting plate between the two side of mounting bracket and the cylinder, the fixed mounting bracket has the fixed mounting bracket, the end that has the cylinder.

By adopting the scheme, through setting up the motor, intermittent type rotary mechanism, transfer roller and conveyer belt, the motor can drive transfer roller intermittent type rotation through intermittent type rotary mechanism, transfer roller intermittent type rotation can drive the conveying and drive synchronous motion, thereby can realize the transport work to the oil bottle, through setting up belt pulley and belt, utilize belt and belt pulley to order about the synchronous rotation of transfer roller of both sides, and then can order about two conveyer belt synchronous motion, realize two synchronous going on of transport work, need not to use a plurality of motors to drive, practice thrift use cost, through setting up anti-deflection board and adjustment mechanism, utilize adjustment mechanism to adjust the distance between two anti-deflection boards, utilize anti-deflection board can realize the spacing direction work to the oil bottle, avoid appearing the condition that the skew drops in the oil bottle transportation process, in order to improve the stability of oil bottle transport, further guarantee the normal clear of follow-up work, through setting up cylinder, the leading truck, fixture, moving plate and unloading board, utilize cylinder leading truck backward side motion cooperation fixture can carry out the centre gripping to some oil filling inadequate oil bottles, simultaneously drive the motion board through the leading truck, follow-up cylinder side moves down, the quality of carrying out follow-up work liquid is guaranteed to be continued to the product through the follow-up motion, the product is guaranteed to drop into on the follow-up work liquid.

In the above scheme, it should be noted that the motor and the cylinder are both electrically connected with an external power supply.

As a preferable scheme of the utility model, the intermittent rotating mechanism comprises a semicircular disc fixedly arranged at the end part of an output shaft of the motor, a rotating rod is arranged on the semicircular disc, round rods are arranged on the side face of the rotating rod, a transmission plate is fixedly arranged on the outer surface of one conveying roller, and a plurality of strip-shaped channels matched with the round rods and semicircular grooves matched with the semicircular disc are formed in the transmission plate.

By adopting the scheme, through setting up semicircle board, bull stick, round bar and drive plate, the motor drives the semicircle board and rotates, and the semicircle board rotates and drives bull stick and round bar synchronous motion, can order about the drive plate to take place to rotate after the bar passageway on the round bar moves to the drive plate, and when the semicircle board rotated to the laminating of drive plate semicircle groove mutually, the drive plate is static motionless, and then can realize the intermittent type transport work that the oil bottle was not shut down, and follow-up staff of being convenient for operates the oil bottle, improves the simplicity of work.

As a preferable scheme of the utility model, the adjusting mechanism comprises a bidirectional threaded rod rotatably arranged in the front side mounting frame, a rotating handle is arranged at the end part of the bidirectional threaded rod, two connecting rods are fixedly arranged on the lower surfaces of the two anti-deflection plates, the bottom ends of the two connecting rods on the same side are fixedly provided with the same fixing plate, and the two fixing plates are respectively and spirally arranged on two sections of threads of the bidirectional threaded rod.

By adopting the scheme, through setting up two-way threaded rod, fixed plate and connecting plate, utilize to change to drive two-way threaded rod and rotate, two fixed plates are close to each other or keep away from relatively in the rotation of two-way threaded rod, and the fixed plate motion drives through the connecting rod and prevents off-set board synchronous motion, realizes the work to the spacing direction of oil bottle, avoids the oil bottle to carry the condition that the skew dropped to appear in the in-process to guarantee the stability of oil bottle in-process of carrying.

As a preferable scheme of the utility model, two sides of the bidirectional threaded rod are respectively provided with a sliding rod, the sliding rods are fixedly arranged in the mounting frame at the front side, and the fixing plates are slidably arranged on the outer surfaces of the two sliding rods.

By adopting the scheme, the sliding rod is utilized to play a role in limiting and guiding the fixed plate, so that the condition of rotation and shaking in the moving process of the fixed plate is avoided, the moving stability of the fixed plate is improved, and the normal movement of the anti-deflection plate is further ensured.

As a preferable scheme of the utility model, the side surface of the movable plate is fixedly provided with the arc-shaped sliding rod, the arc-shaped sliding rod is slidably arranged on the mounting plate at the hinged position, the end part of the arc-shaped sliding rod is provided with the limiting block, the outer surface of the arc-shaped sliding rod is sleeved with the spring, and the two ends of the spring are respectively and fixedly arranged on the mounting plate at the hinged position and the movable plate.

By adopting the scheme, through setting up arc slide bar and spring, utilize the arc slide bar can play the effect of spacing direction to the movable plate, avoid the condition that skew appears in the movable plate motion process, utilize the elasticity of spring to order about the movable plate simultaneously and get back to the normal position fast, realize the work to the spacing direction of oil bottle, avoid the condition that skew appears in the oil bottle transportation, guarantee the stability in the oil bottle transportation.

As a preferable scheme of the utility model, the clamping mechanism comprises an electric push rod fixedly arranged on a guide frame, a fixed block is fixedly arranged at the end part of the electric push rod, two slide ways are arranged on the guide frame, guide rods are fixedly arranged in the two slide ways, clamping plates are slidably arranged on the outer surfaces of the two guide rods, the outer surfaces of the clamping plates are attached to the inner walls of the slide ways, two connecting rods are hinged to the two clamping plates, and the other ends of the connecting rods are hinged to the fixed block.

By adopting the scheme, through setting up electric putter, fixed block, connecting rod and grip block, utilize the cylinder to promote the leading truck to the rear side motion, the leading truck motion drives grip block synchronous motion, when making the grip block move to the oil bottle both sides, drive the fixed block forward side motion through electric putter, the fixed block motion drives the connecting rod rotation, the connecting rod rotates and drives two grip blocks and be close to each other, realize the centre gripping work to the oil bottle, be convenient for push the oil bottle that does not irritate full to the conveyer belt at rear on, be convenient for the follow-up recharge work to the oil bottle.

In the above scheme, it should be noted that the electric push rod is electrically connected with an external power supply.

In the utility model, the following components are added:

according to the anti-deviation conveying mechanism, the anti-deviation plates and the adjusting mechanism are arranged, the adjusting mechanism can be used for adjusting the distance between the two anti-deviation plates, limiting and guiding operation on the oil bottle can be achieved through the anti-deviation plates, the situation that the oil bottle is deviated and falls in the conveying process is avoided, so that the conveying stability of the oil bottle is improved, and the normal operation of subsequent operation is further guaranteed;

according to the anti-deviation conveying mechanism, the air cylinder, the guide frame, the clamping mechanism, the moving plate and the blanking plate are arranged, the air cylinder is used for driving the guide frame to move towards the rear side, the guide frame is matched with the clamping mechanism in a moving mode, so that some insufficiently filled oil bottles can be clamped, meanwhile, the air cylinder drives the oil bottles to move towards the rear side through the guide frame, the oil bottles continue to move to push the moving plate to fall onto a conveyor belt at the rear side through the blanking plate, follow-up liquid supplementing operation is facilitated, product quality is guaranteed, and follow-up operation is prevented from being influenced;

this prevent partially conveying mechanism is through setting up motor, intermittent type slewing mechanism, transfer roller and conveyer belt, the motor can drive the transfer roller intermittent type through intermittent type slewing mechanism and rotate, transfer roller intermittent type rotates and can drive conveying and drive synchronous motion, thereby can realize the transport work to the oil bottle, through setting up belt pulley and belt, utilize belt and belt pulley can drive the transfer roller synchronous rotation of both sides, and then can drive two conveyer belt synchronous motion, realize going on in step of two transport works, need not to use a plurality of motors to drive, practice thrift use cost.

Drawings

FIG. 1 is a schematic diagram of the structure of the present utility model;

FIG. 2 is a schematic view of another angle of the present utility model;

FIG. 3 is a schematic structural view of the blanking plate of the present utility model;

FIG. 4 is a schematic cross-sectional view of the mounting bracket of the present utility model;

fig. 5 is a schematic structural view of the clamping mechanism of the present utility model.

In the figure: 1. a bottom plate; 2. a mounting frame; 3. a two-way threaded rod; 4. a slide bar; 5. a fixing plate; 6. a connecting rod; 7. an anti-deflection plate; 8. a conveyor belt; 9. a motor; 10. a half-disc; 11. a rotating rod; 12. a round bar; 13. a drive plate; 14. a conveying roller; 15. a support plate; 16. a cylinder; 17. a mounting plate; 18. an electric push rod; 19. a spring; 20. a fixed block; 21. a connecting rod; 22. a guide frame; 23. a clamping plate; 24. a guide rod; 25. a moving plate; 26. an arc-shaped sliding rod; 27. a blanking plate; 28. a belt; 29. a belt pulley.

Detailed Description

Examples

Referring to fig. 1-5, the utility model provides an anti-deflection conveying mechanism, which comprises a bottom plate 1, two mounting frames 2 are fixedly arranged on the upper surface of the bottom plate 1, two conveying rollers 14 are rotatably arranged in the two mounting frames 2, the outer surfaces of the two conveying rollers 14 are sleeved with the same conveying belt 8, belt pulleys 29 are sleeved on the outer surfaces of the two conveying rollers 14 on the left side, the two belt pulleys 29 are in transmission connection through a belt 28, a motor 9 is fixedly arranged on the side surface of one mounting frame 2, an intermittent rotating mechanism for driving the conveying rollers 14 to intermittently rotate is arranged on the motor 9, the intermittent rotating mechanism comprises a semicircular disc 10 fixedly arranged at the end part of the output shaft of the motor 9, a rotating rod 11 is arranged on the semicircular disc 10, round rods 12 are arranged on the side surface of the rotating rod 11, a transmission plate 13 is fixedly arranged on the outer surface of one conveying roller 14, a plurality of bar-shaped channels matched with the round rods 12 and semicircular grooves matched with the semicircular disc 10 are formed in the transmission plate 13, the semicircular disc 10 is rotatably driven by arranging the semicircular disc 10, the rotating rod 11, the round rods 12 and the transmission plate 13 and the motor 9 drives the semicircular disc 10 to rotate, and the semicircular disc 11 and the round rods 12 are driven to intermittently rotate, when the transmission plate 13 is in a synchronous motion state, and the intermittent motion of the semicircular disc 13 is stopped, and the intermittent motion of the bottle 13 is convenient;

the blanking port is fixedly formed in the side face of the front mounting frame 2, the movable plate 25 is arranged at the blanking port, two mounting plates 17 matched with the movable plate 25 are fixedly arranged on the side face of the front mounting frame 2, the movable plate 25 is hinged to one of the mounting plates 17, an arc sliding rod 26 is fixedly arranged on the side face of the movable plate 25, the arc sliding rod 26 is slidably arranged on the mounting plate 17 at the hinged position, a limiting block is arranged at the end part of the arc sliding rod 26, a spring 19 is sleeved on the outer surface of the arc sliding rod 26, two ends of the spring 19 are fixedly arranged on the mounting plate 17 at the hinged position and the movable plate 25 respectively, through the arrangement of the arc sliding rod 26 and the spring 19, the movable plate 25 can be subjected to limiting guide by the arc sliding rod 26, the phenomenon of deflection in the movement process of the movable plate 25 is avoided, meanwhile, the movable plate 25 can be driven to quickly return to the original position by the elasticity of the spring 19, the phenomenon of deflection in the oil bottle transportation process is avoided, and the stability in the oil bottle transportation process is ensured;

the side surface of the front mounting frame 2 is obliquely provided with a blanking plate 27 matched with the moving plate 25, the other end of the blanking plate 27 extends to the upper side of the rear conveyor belt 8, the rear mounting frame 2 is provided with an opening matched with the blanking plate 27, two anti-deflection plates 7 are arranged in the front mounting frame 2, the lower surfaces of the two anti-deflection plates 7 are attached to the surface of the lower conveyor belt 8, an adjusting mechanism used for adjusting the distance between the two anti-deflection plates 7 is arranged in the front mounting frame 2, the adjusting mechanism comprises a bidirectional threaded rod 3 rotatably arranged in the front mounting frame 2, the end part of the bidirectional threaded rod 3 is provided with a turning handle, the lower surfaces of the two anti-deflection plates 7 are fixedly provided with two connecting rods 6, the bottom ends of the two connecting rods 6 on the same side are fixedly provided with the same fixed plate 5, the two fixed plates 5 are respectively arranged on two sections of threads of the bidirectional threaded rod 3, the two fixed plates 5 and the connecting plates 5 are in a threaded manner through the two sections of threads, the two threaded rods 3 are driven by the turning handle, the two fixed plates 3 are driven to rotate, the two fixed plates 5 are driven to move relatively, or move relatively far away from each other, and the fixed plates are prevented from the fixed plates from moving synchronously, and the oil bottle is prevented from dropping in the process, and the condition of the conveying bottles are guaranteed, and the oil bottle is stable in the process is guaranteed;

the two sides of the bidirectional threaded rod 3 are respectively provided with a slide rod 4, the slide rods 4 are fixedly arranged in the mounting frame 2 at the front side, the fixed plates 5 are slidably arranged on the outer surfaces of the two slide rods 4, and the slide rods 4 are used for playing a role in limiting and guiding the fixed plates 5 so as to avoid the condition of rotation and shaking in the moving process of the fixed plates 5, improve the moving stability of the fixed plates 5 and further ensure the normal movement of the deviation preventing plates 7;

the upper surface of the bottom plate 1 is fixedly provided with a supporting plate 15, an air cylinder 16 is fixedly arranged on the supporting plate 15, the end part of a piston rod of the air cylinder 16 is fixedly provided with a guide frame 22, the guide frame 22 is provided with a clamping mechanism, the clamping mechanism comprises an electric push rod 18 fixedly arranged on the guide frame 22, the end part of the electric push rod 18 is fixedly provided with a fixed block 20, two slide ways are arranged on the guide frame 22, guide rods 24 are fixedly arranged in the two slide ways, the outer surfaces of the two guide rods 24 are respectively provided with a clamping plate 23 in a sliding manner, the outer surfaces of the clamping plates 23 are attached to the inner walls of the slide ways, the two clamping plates 23 are respectively hinged with two connecting rods 21, the other ends of the connecting rods 21 are respectively hinged to the fixed block 20, the guide frame 22 is pushed to move to the rear side by the air cylinder 16, the guide frame 22 moves to drive the clamping plates 23 to synchronously move, when the clamping plates 23 move to the two sides of an oil bottle, the fixed block 20 is driven to move to the front side by the electric push the connecting rods 21, the connecting rods 21 rotate to drive the two clamping plates 23 to be close to each other, the two connecting rods 23 to each other, the filling operation is convenient, and the subsequent filling operation of the bottle 8 is carried out, and the filling operation is convenient;

through setting up motor 9, intermittent type rotary mechanism, transfer roller 14 and conveyer belt 8, motor 9 can drive transfer roller 14 intermittent type through intermittent type rotary mechanism, transfer roller 14 intermittent type rotation can drive conveyer belt 8 and move synchronous motion, thereby can realize the transportation work to the oil bottle, through setting up belt pulley 29 and belt 28, utilize belt 28 and belt pulley 29 to order about the synchronous rotation of both sides's transfer roller 14, and then can order about two conveyer belts 8 synchronous motion, realize two synchronous going on of transportation work, need not to use a plurality of motors 9 to drive, practice thrift the use cost, through setting up anti-deflection plate 7 and adjustment mechanism, utilize adjustment mechanism to adjust the distance between two anti-deflection plates 7, utilize anti-deflection plate 7 can realize the spacing direction work to the oil bottle, avoid appearing the skew condition that drops in the oil bottle transportation process, further guarantee the normal clear progress of follow-up work, through setting up cylinder 16, leading truck 22, fixture, movable plate 25 and blanking plate 27, utilize cylinder 16 to order about leading truck 22 to move to the synchronous motion to realize two conveyer belt 8, it can not fully to carry out the product quality of filling to follow-up work to follow-up the side through the carrier 22, the product is fully moved down to the carrier 25 is guaranteed that the following work is carried out to the following work carrier 22 is carried out, the product is not to the following work carrier 25 is moved to the side through setting up carrier 22.

Working principle: when the oil bottle filling machine is used, an oil bottle is placed on the front conveyor belt 8, the rotating handle is utilized to drive the bidirectional threaded rod 3 to rotate, the bidirectional threaded rod 3 rotates to drive the two fixing plates 5 to be close to each other, the fixing plates 5 move to drive the anti-deflection plates 7 to synchronously move through the connecting rods 6, the anti-deflection plates 7 are attached to the surface of the oil bottle, limit guiding work of the oil bottle is achieved, then the motor 9 is opened, the motor 9 drives the semicircular disc 10 to rotate, the rotating rod 11 and the round rod 12 synchronously move, when the round rod 12 moves into a strip-shaped channel on the transmission plate 13, the transmission plate 13 is driven to rotate, when the semicircular rod 12 rotates to the semicircular groove of the transmission plate 13 to be attached to each other, the transmission plate 13 is stationary, intermittent conveying work of the oil bottle without stopping can be achieved, when partial disqualification or incomplete filling of the oil bottle occurs, the guide frame 22 is driven to synchronously move through the control cylinder 16, when the clamping plates 23 are driven to move to the two sides of the oil bottle, the fixing blocks 20 are driven to move through the electric push rod 18 to the front side 20, the fixing blocks 20 are driven to move to the two connecting rods 20 to move, and then the oil bottle filling machine is driven to continuously to move to the oil bottle, and the oil bottle filling machine is driven to move to the oil bottle through the connecting rods to the connecting rods 25.

Claims (6)

1. An anti-deviation conveying mechanism is characterized by comprising a bottom plate (1), wherein two mounting frames (2) are fixedly arranged on the upper surface of the bottom plate (1), two conveying rollers (14) are rotatably arranged in the mounting frames (2) respectively, the outer surfaces of the two conveying rollers (14) are sleeved with a same conveying belt (8), belt pulleys (29) are sleeved on the outer surfaces of the two conveying rollers (14) on the left side respectively, the two belt pulleys (29) are in transmission connection through a belt (28), one side surface of the mounting frames (2) is fixedly provided with a motor (9), an intermittent rotating mechanism for driving the conveying rollers (14) to intermittently rotate is arranged on the motor (9), a feed opening is fixedly arranged on the side surface of the mounting frames (2) on the front side, a moving plate (25) is arranged at the feed opening, mounting plates (17) used by the two matched moving plates (25) are fixedly arranged on the side surfaces of the mounting frames (2), the moving plate (25) are hinged on one mounting plate (17), the side surface of the front side of the mounting frames (2) is provided with an opening for the lower plate (27) which is used for the lower plate (27) to be matched with the upper end of the lower plate (27), the utility model provides a be provided with two prevent off-set boards (7) in mounting bracket (2) of front side and the lower surface of two prevent off-set boards (7) all laminates with the surface of below conveyer belt (8), the front side be provided with in mounting bracket (2) and be used for adjusting the adjustment mechanism of distance between two prevent off-set boards (7), the last fixed surface of bottom plate (1) installs backup pad (15), fixed mounting has cylinder (16) on backup pad (15), the tip fixed mounting of cylinder (16) piston rod has leading truck (22), and is provided with fixture on leading truck (22).

2. The anti-deviation conveying mechanism according to claim 1, wherein the intermittent rotating mechanism comprises a semicircular disc (10) fixedly installed at the end part of an output shaft of the motor (9), a rotating rod (11) is installed on the semicircular disc (10), round rods (12) are installed on the side face of the rotating rod (11), a transmission plate (13) is fixedly installed on the outer surface of one conveying roller (14), and a plurality of strip-shaped channels matched with the round rods (12) and semicircular grooves matched with the semicircular disc (10) are formed in the transmission plate (13).

3. The anti-deviation conveying mechanism according to claim 1, wherein the adjusting mechanism comprises a bidirectional threaded rod (3) rotatably installed in a front side installation frame (2), a rotating handle is installed at the end portion of the bidirectional threaded rod (3), two connecting rods (6) are fixedly installed on the lower surfaces of two anti-deviation plates (7), the same fixing plate (5) is fixedly installed at the bottom ends of the two connecting rods (6) on the same side, and the two fixing plates (5) are respectively installed on two sections of threads of the bidirectional threaded rod (3) in a threaded mode.

4. An anti-deviation conveying mechanism according to claim 3, characterized in that sliding rods (4) are arranged on two sides of the bidirectional threaded rod (3), the sliding rods (4) are fixedly arranged in the front-side mounting frame (2), and the fixing plates (5) are slidably arranged on the outer surfaces of the two sliding rods (4).

5. The anti-deviation conveying mechanism according to claim 1, wherein an arc-shaped sliding rod (26) is fixedly arranged on the side face of the moving plate (25), the arc-shaped sliding rod (26) is slidably arranged on the mounting plate (17) at the hinged position, a limiting block is arranged at the end portion of the arc-shaped sliding rod (26), a spring (19) is sleeved on the outer surface of the arc-shaped sliding rod (26), and two ends of the spring (19) are fixedly arranged on the mounting plate (17) at the hinged position and the moving plate (25) respectively.

6. The anti-deviation conveying mechanism according to claim 1, wherein the clamping mechanism comprises an electric push rod (18) fixedly installed on a guide frame (22), a fixed block (20) is fixedly installed at the end part of the electric push rod (18), two slide ways are arranged on the guide frame (22), guide rods (24) are fixedly installed in the two slide ways, clamping plates (23) are slidably installed on the outer surfaces of the two guide rods (24), the outer surfaces of the clamping plates (23) are attached to the inner walls of the slide ways, two connecting rods (21) are hinged to the two clamping plates (23), and the other ends of the connecting rods (21) are hinged to the fixed block (20).