Novel stepless pneumatic carrying mechanism

Abstract

The utility model discloses a novel stepless pneumatic carrying mechanism, which belongs to the technical field of carrying devices and comprises a framework, and a robot flange connecting plate is fixedly connected to the middle of the upper end of the framework. Adjusting and clamping assemblies are installed on the periphery of the upper end of the framework. The adjusting and clamping assembly comprises four moving assemblies, two adjusting assemblies and a clamping assembly, two in-place detection assemblies are installed on the framework, and limiting assemblies are installed on the front side and the rear side of the upper end of the framework. By means of the mode, the tray state is detected through the in-place detection assembly, the trays are stably carried, the trays of different widths, lengths and models can be carried, applicability is high, different carrying mechanisms do not need to be replaced according to the trays of different models, and cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of handling devices, and particularly relates to a novel stepless pneumatic handling mechanism. Background Art

[0002] At present, in the field of production and preparation of new energy battery foaming processes, the upper cover and tray of the foamed product are grasped and transferred by the clamping of a robot.

[0003] Chinese Patent CN219807435U discloses a grasping mechanism and a handling device for a tray and a pallet, including a carrier frame, and further including a first linear displacement assembly, a bracket, a clamping cylinder, a claw and a support block. Among them, at least two first linear displacement assemblies are arranged on the carrier frame, and the two first linear displacement assemblies are symmetrically arranged; a bracket is arranged on the displacement parts of the two first linear displacement assemblies respectively; a clamping cylinder is arranged on each of the two brackets; a claw is arranged on each of the two brackets, and the claw is parallel to the clamping cylinder; the support block is arranged on the bracket, and one side of the support block abuts against the clamping cylinder, and the opposite side abuts against the claw. By arranging the clamping cylinder and the claw on the bracket connected to the first linear displacement assembly.

[0004] However, this patent cannot detect whether the tray is clamped in place, and there may be a phenomenon that the tray is carried before it is properly clamped during handling, resulting in the tray falling off the handling mechanism.

[0005] Based on this, the utility model designs a novel stepless pneumatic handling mechanism to solve the above problems. Content of the Utility Model

[0006] Aiming at the above-mentioned disadvantages of the prior art, the utility model provides a novel stepless pneumatic handling mechanism.

[0007] To achieve the above purposes, the utility model is realized through the following technical solutions:

[0008] A novel stepless pneumatic handling mechanism includes a framework;

[0009] A robot flange connecting plate is fixedly connected to the middle of the upper end of the framework;

[0010] Adjustable clamping components are installed at the four surrounding positions of the upper end of the framework;

[0011] The adjustable clamping component includes four groups of moving components, two groups of adjusting components and a clamping component. The moving components are installed at the four surrounding positions of the upper end of the framework. The two groups of adjusting components are respectively connected to the two groups of moving components at the rear side. The moving components and the adjusting components are both connected to the clamping component;

[0012] Two sets of in-position detection components are installed on the skeleton, and the two sets of in-position detection components are respectively located at the rear side of the left end of the skeleton and the front side of the right end of the skeleton;

[0013] Limit components are installed on both the front and rear sides of the upper end of the skeleton.

[0014] Furthermore, the moving component includes a chute, a second limit bolt, a second linear guide rail, a sliding plate, an impact block, and a hydraulic buffer. The guide rails of the two sets of second linear guide rails are fixedly connected to the right side of the upper end of the skeleton, and the sliders of the second linear guide rails are fixedly connected to the sliding plate. Impact blocks are fixedly connected to both the front and rear ends of the sliding plate. A chute for the clamping component to slide is provided on the skeleton, and the chute is located between the two sets of second linear guide rails. Two symmetrically arranged hydraulic buffers are fixedly connected to the front end of the skeleton, and two symmetrically arranged second limit bolts are fixedly connected to the front end of the concave part of the skeleton.

[0015] Furthermore, the adjusting component and the clamping component are both connected to the sliding plate.

[0016] Furthermore, the adjusting component includes a third linear guide rail, a moving plate, and a second cylinder. The slide rails of the two sets of third linear guide rails are fixedly connected to the left and right sides of the upper end of the sliding plate. The third linear guide rail is perpendicular to the second linear guide rail. The sliders of the third linear guide rail are fixedly connected to the moving plate. The second cylinder is fixedly connected to the front side of the upper end of the sliding plate, and the output end of the second cylinder is fixedly connected to the moving plate.

[0017] Furthermore, the moving plate is connected to the clamping component.

[0018] Furthermore, the clamping component includes a third cylinder, a base, a plug pin, and an avoidance groove. Two sets of third cylinders are respectively fixedly connected to the right side of the upper end of the left sliding plate, and the output ends of the third cylinders are respectively fixedly connected to the right sliding plate. The lower ends of the front sliding plate and the moving plate are both fixedly connected to the base. An avoidance groove for the base to slide is provided on the rear sliding plate, and the avoidance groove is located between the two sets of third linear guide rails. Plug pins are fixedly connected to the lower sides of the inner ends of the base.

[0019] Furthermore, the in-position detection component includes a proximity switch, a mounting bracket, a fixing plate, a sliding rod, a linear bearing, a limit block, and a spring. The fixing plate is fixedly connected to the upper end of the triangular plate at the concave part of the left end of the skeleton. A mounting bracket is fixedly connected to the rear side of the upper end of the fixing plate, and two vertically arranged proximity switches are fixedly connected to the mounting bracket. A linear bearing is fixedly connected to the circular hole on the front side of the upper end of the fixing plate, and the inner wall of the linear bearing is in sliding fit with the sliding rod. The lower end of the sliding rod is fixedly connected to the limit block, the spring is sleeved on the sliding rod, and the two ends of the spring are respectively fixedly connected to the limit block and the raised part at the lower end of the fixing plate.

[0020] Furthermore, the limiting assembly includes a connecting piece, a first limiting bolt, a first linear guide and a first cylinder. The sliding rails of the two groups of first linear guides are respectively fixedly connected to the left and right sides of the upper end of the skeleton. The upper ends of the sliders of the first linear guides are respectively fixedly connected to the left and right ends of the connecting piece. The left and right ends of the connecting piece are both fixedly connected with the first limiting bolt. The first cylinder is fixedly connected to the front side of the upper end of the skeleton, and the output end of the first cylinder is fixedly connected to the connecting piece.

[0021] Compared with the prior art, the utility model has the following beneficial effects:

[0022] When the utility model is in use, the manipulator moves the conveying mechanism to the conveying position, the adjusting component drives the clamping component on the rear side to move forward and backward to adjust the spacing between the front and rear clamping components to adapt to the size of the pallet to be conveyed in the width direction, the limiting component moves forward and backward to adjust the distance between the left and right moving components, thereby adjusting the distance between the left and right clamping components to adapt to the size of the pallet to be conveyed in the length direction, and then the clamping component drives the moving component to move inward, the moving component on the rear side drives the adjusting component to move inward, the moving component and the adjusting component drive the clamping component to move inward to clamp the pallet, the in-place detection component detects whether the pallet is clamped in place, and after it is in place, the manipulator moves the conveying mechanism to the discharging position, and the clamping component drives the moving component to The pallet is moved outward, the moving component on the rear side drives the adjusting component to move outward, and the moving component and the adjusting component drive the clamping component to move outward and away from the pallet. The in-place detection component detects whether the pallet is in place. After it is in place, the manipulator moves the transport mechanism to the transport position again for the next transport. The pallet status is detected by the in-place detection component to stably transport the pallet. The transport mechanism is composed of a simple structure, is not prone to failure, and has low maintenance difficulty. The spacing between the front and rear clamping components is adjusted by the adjusting component to adapt to pallets of different widths. The distance between the left and right clamping components is adjusted by moving the limit component forward and backward to adapt to pallets of different lengths. It has high applicability and does not need to replace different transport mechanisms according to different types of pallets, thereby reducing costs.

[0023] The utility model can detect whether the pallet is clamped or placed, and the robot arm will not move before the pallet is clamped or placed, thereby causing the pallet to fall off the transport mechanism and damage the product, or the pallet that has been transported to be moved back to its original position. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0025] Figure 1 The three-dimensional view of a new type of stepless pneumatic handling mechanism of the present utility model Figure 1 ;

[0026] Figure 2 The front view of a new type of stepless pneumatic handling mechanism of the present utility model;

[0027] Figure 3 The three-dimensional view of a new type of stepless pneumatic handling mechanism of the present utility model Figure 2 ;

[0028] Figure 4 The three-dimensional view of a new type of stepless pneumatic handling mechanism of the present utility model Figure 3 ;

[0029] Figure 5 is Figure 3 The enlarged view of the position A in

[0030] Figure 6 is Figure 3 The enlarged view of the position B in

[0031] Figure 7 is Figure 3 The enlarged view of the position C in

[0032] Figure 8 is Figure 4 The enlarged view of the position D in

[0033] The reference numerals in the figure respectively represent:

[0034] 1. Skeleton; 2. Robot flange connecting plate; 3. Limit component; 31. Connecting piece; 32. First limit bolt; 33. First linear guide rail; 34. First cylinder; 4. Adjusting and clamping component; 41. Moving component; 411. Chute; 412. Second limit bolt; 413. Second linear guide rail; 414. Slide plate; 415. Impact block; 416. Hydraulic buffer; 42. Adjusting component; 421. Third linear guide rail; 422. Moving plate; 423. Second cylinder; 43. Clamping component; 431. Third cylinder; 432. Base; 433. Plug; 434. Avoidance groove; 5. In-position detection component; 51. Proximity switch; 52. Mounting bracket; 53. Fixed plate; 54. Slide rod; 55. Linear bearing; 56. Limit block; 57. Spring. Specific embodiments

[0035] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0036] In the following description, the "left", "right", "front", "rear", "upper", and "lower" mentioned are oriented in the perspective direction of the front view.

[0037] Embodiment 1

[0038] In some embodiments, please refer to the attached drawings of the specification Figures 1-8 , a novel non-polar pneumatic handling mechanism, including a framework 1;

[0039] A robot flange connecting plate 2 is fixedly connected to the middle of the upper end of the framework 1;

[0040] Adjustable clamping assemblies 4 are installed at the four peripheral positions of the upper end of the framework 1;

[0041] The adjustable clamping assembly 4 includes four groups of moving assemblies 41, two groups of adjusting assemblies 42, and a clamping assembly 43. The moving assemblies 41 are installed at the four peripheral positions of the upper end of the framework 1. The two groups of adjusting assemblies 42 are respectively connected to the two groups of moving assemblies 41 at the rear side. The moving assemblies 41 and the adjusting assemblies 42 are both connected to the clamping assembly 43;

[0042] Two in-position detection assemblies 5 are installed on the framework 1. The two in-position detection assemblies 5 are respectively located at the rear side of the left end of the framework 1 and the front side of the right end of the framework 1;

[0043] Limit assemblies 3 are installed on the front and rear sides of the upper end of the framework 1.

[0044] The framework 1 is in the shape of "I".

[0045] During use, the manipulator moves the handling mechanism to the handling position. The adjusting component 42 drives the clamping component 43 at the rear to move back and forth to adjust the distance between the front and rear clamping components 43, adapting to the size of the pallet to be handled in the width direction. The limiting component 3 moves back and forth to adjust the distance between the left and right moving components 41, thereby adjusting the distance between the left and right clamping components 43, adapting to the size of the pallet to be handled in the length direction. Then, the clamping component 43 drives the moving component 41 to move inward, the moving component 41 at the rear drives the adjusting component 42 to move inward, and the moving component 41 and the adjusting component 42 drive the clamping component 43 to move inward to clamp the pallet. The in-position detection component 5 detects whether the pallet is clamped in place. After that, the manipulator moves the handling mechanism to the discharging position. The clamping component 43 drives the moving component 41 to move outward, the moving component 41 at the rear drives the adjusting component 42 to move outward, and the moving component 41 and the adjusting component 42 drive the clamping component 43 to move outward to release the pallet. The in-position detection component 5 detects whether the pallet is placed in place. After that, the manipulator moves the handling mechanism back to the handling position to perform the next handling. By detecting the state of the pallet through the in-position detection component 5, the pallet can be stably handled. Moreover, the handling mechanism is composed of a simple structure, is not prone to failure, and has a low maintenance difficulty. By adjusting the distance between the front and rear clamping components 43 through the adjusting component 42, it can adapt to pallets of different width models. By moving the limiting component 3 back and forth to adjust the distance between the left and right clamping components 43, it can adapt to pallets of different length models, with high applicability, and there is no need to replace different handling mechanisms according to different model pallets, reducing costs.

[0046] Taking the adjusting and clamping component 4 at the front right end as an example for description, the moving component 41 includes a sliding groove 411, a second limiting bolt 412, a second linear guide rail 413, a sliding plate 414, an impact block 415, and a hydraulic buffer 416. The guide rails of the two groups of second linear guide rails 413 are fixedly connected to the upper right side of the skeleton 1. The sliders of the second linear guide rails 413 are fixedly connected to the sliding plate 414. Impact blocks 415 are fixedly connected to the front and rear ends of the sliding plate 414. A sliding groove 411 for the clamping component 43 to slide is formed on the skeleton 1. The sliding groove 411 is located between the two groups of second linear guide rails 413. Two symmetrically arranged hydraulic buffers 416 are fixedly connected to the front end of the skeleton 1. Two symmetrically arranged second limiting bolts 412 are fixedly connected to the front end of the recess of the skeleton 1.

[0047] The adjusting component 42 and the clamping component 43 are both connected to the sliding plate 414.

[0048] Taking the adjustment component 42 at the left end of the rear side as an example for description, the adjustment component 42 includes a third linear guide rail 421, a moving plate 422, and a second cylinder 423. The slide rails of the two groups of third linear guide rails 421 are fixedly connected to the left and right sides of the upper end of the slide plate 414. The third linear guide rail 421 is vertically arranged with the second linear guide rail 413. The sliders of the third linear guide rail 421 are fixedly connected to the moving plate 422. The second cylinder 423 is fixedly connected to the front side of the upper end of the slide plate 414, and the output end of the second cylinder 423 is fixedly connected to the moving plate 422.

[0049] The moving plate 422 is connected to the clamping component 43.

[0050] The clamping component 43 includes a third cylinder 431, a base 432, a bolt 433, and an avoidance groove 434. The two groups of third cylinders 431 are respectively fixedly connected to the right side of the upper end of the left slide plate 414. The output ends of the third cylinders 431 are respectively fixedly connected to the right slide plate 414. The lower ends of the front slide plate 414 and the moving plate 422 are both fixedly connected to the base 432. An avoidance groove 434 for the base 432 to slide is formed on the rear slide plate 414. The avoidance groove 434 is located between the two groups of third linear guide rails 421. Bolts 433 are fixedly connected to the lower sides of the inner ends of the base 432.

[0051] When clamping and releasing the tray, the second cylinder 423 drives the moving plate 422 to move back and forth under the guiding action of the third linear guide rail 421. The moving plate 422 drives the rear base 432 to move back and forth in the avoidance groove 434 and the sliding groove 411. The base 432 drives the bolt 433 to move back and forth until it moves to adapt to the width dimension of the tray to be carried. The limiting component 3 moves back and forth to adapt to the length dimension of the tray to be carried. The third cylinder 431 drives the left and right slide plates 414 to move inwards or outwards under the guiding action of the second linear guide rail 413. The slide plates 414 drive the impact blocks 415 to move inwards and outwards to impact the hydraulic buffer 416 and the second limit bolt 412. The second limit bolt 412 and the hydraulic buffer 416 play a role in buffering and limiting the slide plates 414. The rear slide plate 414 drives the third linear guide rail 421 and the moving plate 422 to move inwards and outwards. The slide plates 414 and the moving plate 422 drive the base 432 to move inwards and outwards. The base 432 drives the bolt 433 to move inwards to insert into the tray positioning hole to clamp the tray, and the base 432 drives the bolt 433 to move outwards to release the tray. It can clamp trays of different lengths and widths, models, and sizes, and there is no need to replace different handling mechanisms when clamping trays of different models, saving costs and having high applicability.

[0052] Taking the in-situ detection component 5 on the rear side of the left end as an example, the in-situ detection component 5 includes a proximity switch 51, a mounting bracket 52, a fixed plate 53, a slide bar 54, a linear bearing 55, a limit block 56 and a spring 57. The fixed plate 53 is fixedly connected to the upper end of the triangular plate in the depression at the left end of the skeleton 1, and the mounting bracket 52 is fixedly connected to the rear side of the upper end of the fixed plate 53. Two groups of proximity switches 51 arranged up and down are fixedly connected to the mounting bracket 52. A linear bearing 55 is fixedly connected in the circular hole on the front side of the upper end of the fixed plate 53. The inner wall of the linear bearing 55 is slidably connected to the slide bar 54. The lower end of the slide bar 54 is fixedly connected to the limit block 56. The spring 57 is sleeved on the slide bar 54, and the two ends of the spring 57 are respectively fixedly connected to the limit block 56 and the protrusion at the lower end of the fixed plate 53.

[0053] After the pallet is clamped, the pallet drives the limit block 56 to move upward to squeeze the spring 57, and the limit block 56 drives the slide bar 54 to move upward along the linear bearing 55. At this time, the proximity switches 51 on the upper and lower sides detect the slide bar 54 at the same time, which means that the pallet has been clamped and the robot can transfer the pallet. When the pallet is placed in place, the limit block 56 moves downward under the elastic action of the spring 57, and the limit block 56 drives the slide bar 54 to move downward and reset along the linear bearing 55. At this time, the proximity switch 51 on the lower side detects the slide bar 54, and the proximity switch 51 on the upper side does not detect the slide bar 54, which means that the pallet has been placed. The robot can continue to transfer the pallet, and the operation is stable. The robot will not move before the pallet is clamped or placed, thereby causing the pallet to fall off the handling mechanism and damage the product, or the pallet that has been transported to be moved back to its original position.

[0054] The limit assembly 3 on the front side is described as an example, the limit assembly 3 includes a connecting member 31, a first limit bolt 32, a first linear guide 33 and a first cylinder 34, the slide rails of the two groups of first linear guides 33 are respectively fixedly connected to the left and right sides of the upper end of the skeleton 1, the upper ends of the sliders of the first linear guides 33 are respectively fixedly connected to the left and right ends of the connecting member 31, the left and right ends of the connecting member 31 are fixedly connected with the first limit bolt 32, the first cylinder 34 is fixedly connected to the front side of the upper end of the skeleton 1, and the output end of the first cylinder 34 is fixedly connected to the connecting member 31.

[0055] When limiting, the first cylinder 34 drives the connecting member 31 to move outward under the guidance of the first linear guide 33, and the connecting member 31 drives the first limiting bolt 32 to move outward. Then the third cylinder 431 drives the left and right slides 414 to move inward under the guidance of the second linear guide 413 until the slides 414 resist the first limiting bolt 32, and the stroke of the third cylinder 431 is changed to realize the variable distance of the machine mechanism, thereby achieving the purpose of clamping two pallets of different lengths.

[0056] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements will not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A novel stepless pneumatic transport mechanism, comprising a frame (1), characterized in that: A robot flange connection plate (2) is fixedly connected to the middle of the upper end of the skeleton (1); Adjustable clamping components (4) are installed around the upper end of the frame (1); The adjusting and clamping assembly (4) comprises four groups of moving assemblies (41), two groups of adjusting assemblies (42) and a clamping assembly (43); the moving assemblies (41) are installed around the upper end of the frame (1); the two groups of adjusting assemblies (42) are respectively connected to the two groups of moving assemblies (41) on the rear side; and the moving assemblies (41) and the adjusting assemblies (42) are both connected to the clamping assembly (43); Two groups of in-situ detection components (5) are installed on the skeleton (1), and the two groups of in-situ detection components (5) are respectively located at the rear side of the left end of the skeleton (1) and the front side of the right end of the skeleton (1); Limiting components (3) are installed on the front and rear sides of the upper end of the frame (1).

2. The novel stepless pneumatic transport mechanism according to claim 1 is characterized in that: The moving assembly (41) comprises a slide groove (411), a second limiting bolt (412), a second linear guide rail (413), a slide plate (414), an impact block (415) and a hydraulic buffer (416); the guide rails of the two sets of second linear guide rails (413) are fixedly connected to the right side of the upper end of the frame (1); the sliders of the second linear guide rails (413) are fixedly connected to the slide plate (414); the front and rear ends of the slide plate (414) are fixedly connected to the impact block (415); a slide groove (411) for cooperating with the sliding of the clamping assembly (43) is provided on the frame (1); the slide groove (411) is located between the two sets of second linear guide rails (413); the front end of the frame (1) is fixedly connected to two sets of symmetrically arranged hydraulic buffers (416); the front end of the recess of the frame (1) is fixedly connected to two sets of symmetrically arranged second limiting bolts (412).

3. The novel stepless pneumatic transport mechanism according to claim 2 is characterized in that: The adjusting assembly (42) and the clamping assembly (43) are both connected to the slide plate (414).

4. The novel stepless pneumatic transport mechanism according to claim 3 is characterized in that: The adjustment assembly (42) comprises a third linear guide rail (421), a movable plate (422) and a second cylinder (423); the slide rails of the two sets of third linear guide rails (421) are fixedly connected to the left and right sides of the upper end of the slide plate (414); the third linear guide rail (421) and the second linear guide rail (413) are vertically arranged; the slide blocks of the third linear guide rail (421) are fixedly connected to the movable plate (422); the second cylinder (423) is fixedly connected to the front side of the upper end of the slide plate (414); and the output end of the second cylinder (423) is fixedly connected to the movable plate (422).

5. The novel stepless pneumatic transport mechanism according to claim 4 is characterized in that: The moving plate (422) is connected to the clamping assembly (43).

6. The novel stepless pneumatic transport mechanism according to claim 5 is characterized in that: The clamping assembly (43) comprises a third cylinder (431), a base (432), a latch (433) and an avoidance groove (434); two groups of third cylinders (431) are respectively fixedly connected to the right side of the upper end of the left slide (414); the output ends of the third cylinders (431) are respectively fixedly connected to the right slide (414); the lower end of the front slide (414) and the lower end of the movable plate (422) are both fixedly connected to the base (432); the rear slide (414) is provided with an avoidance groove (434) that cooperates with the base (432) to slide; the avoidance groove (434) is located between the two groups of third linear guide rails (421); and the lower side of the inner end of the base (432) is fixedly connected with a latch (433).

7. The novel stepless pneumatic transport mechanism according to claim 6 is characterized in that: The in-position detection assembly (5) comprises a proximity switch (51), a mounting bracket (52), a fixing plate (53), a slide bar (54), a linear bearing (55), a limit block (56) and a spring (57). The fixing plate (53) is fixedly connected to the upper end of a triangular plate at a recessed position at the left end of the frame (1). The rear side of the upper end of the fixing plate (53) is fixedly connected to the mounting bracket (52). Two groups of proximity switches (51) arranged up and down are fixedly connected to the mounting bracket (52). A linear bearing (55) is fixedly connected in a circular hole at the front side of the upper end of the fixing plate (53). The inner wall of the linear bearing (55) is slidably connected to the slide bar (54). The lower end of the slide bar (54) is fixedly connected to the limit block (56). The spring (57) is sleeved on the slide bar (54). The two ends of the spring (57) are respectively fixedly connected to the limit block (56) and the protrusion at the lower end of the fixing plate (53).

8. The novel stepless pneumatic transport mechanism according to claim 7 is characterized in that: The limiting assembly (3) comprises a connecting member (31), a first limiting bolt (32), a first linear guide rail (33) and a first cylinder (34); the slide rails of the two sets of first linear guide rails (33) are respectively fixedly connected to the left and right sides of the upper end of the frame (1); the upper ends of the slide blocks of the first linear guide rails (33) are respectively fixedly connected to the left and right ends of the connecting member (31); the left and right ends of the connecting member (31) are both fixedly connected to the first limiting bolt (32); the first cylinder (34) is fixedly connected to the front side of the upper end of the frame (1); and the output end of the first cylinder (34) is fixedly connected to the connecting member (31).

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