Symmetrical package folding mechanism capable of rapidly and automatically folding

Abstract

The utility model relates to a fast automatic folding symmetrical package folding mechanism which comprises a material receiving platform, an XYZ-direction linear transferring mechanism and an adjusting and positioning mechanism, the XYZ-direction linear transferring mechanism and the adjusting and positioning mechanism are correspondingly located on the two opposite sides of the material receiving platform, and the adjusting and positioning mechanism is used for adjusting and positioning the position of folded materials; two groups of clamping jaw mechanisms for oppositely clamping materials are arranged on the XYZ-direction linear transferring mechanism, and the XYZ-direction linear transferring mechanism drives the two groups of clamping jaw mechanisms to synchronously move in the XYZ direction; the two sets of clamping jaw mechanisms are connected with the X-direction, Y-direction and Z-direction linear transferring mechanism through rotating mechanisms correspondingly, and the two sets of rotating mechanisms drive the clamping jaw mechanisms connected with the rotating mechanisms to synchronously rotate so as to symmetrically fold materials. The automatic folding and symmetry operation on the packaging materials can be stably and efficiently completed, the step-by-step folding and symmetry operation is not needed, and the folding efficiency is effectively improved; the overall structure is simple, design is reasonable, and debugging and maintenance are convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of packaging equipment, and more specifically, to a fast automatic folding mechanism for symmetrical packaging. Background Art

[0002] When manufacturing symmetrical packaging materials, the traditional method is manual folding of symmetry. After working for a long time, manual workers are prone to fatigue, resulting in reduced manual efficiency and difficult to guarantee the folding quality. Therefore, the prior art has designed and developed a device capable of automatically folding symmetry for automatically folding symmetrical packaging materials. Most of these existing automatic folding symmetry devices use a folding robotic arm mechanism for folding operations. Although it replaces manual labor, the overall structure is relatively complex, the debugging difficulty is large, it has high requirements for debugging personnel, and it also takes a lot of debugging time, affecting production efficiency. Moreover, in the process of folding symmetrical packaging materials, the existing folding robotic arm mechanism usually needs to fold step by step according to the actions of simulating manual folding set by the program, and the stability is easily affected, and its folding efficiency is still low. Summary of the Utility Model

[0003] The technical problem to be solved by the utility model is to provide a fast automatic folding mechanism for symmetrical packaging in view of the above-mentioned defects of the prior art.

[0004] The technical solution adopted by the utility model to solve its technical problems is: a fast automatic folding mechanism for symmetrical packaging, including a material receiving platform, an XYZ linear transfer mechanism, and an adjustment and positioning mechanism. The XYZ linear transfer mechanism and the adjustment and positioning mechanism are respectively located on two opposite sides of the material receiving platform. The adjustment and positioning mechanism is used to adjust and position the position of the material to be folded. There are two sets of jaw mechanisms for clamping the material relatively on the XYZ linear transfer mechanism, and the XYZ linear transfer mechanism drives the two sets of jaw mechanisms to move synchronously along the XYZ direction. Both sets of the jaw mechanisms are respectively connected to the XYZ linear transfer mechanism through a rotating mechanism, and the two sets of rotating mechanisms drive the jaw mechanisms connected thereto to rotate synchronously to fold the material symmetrically.

[0005] In some embodiments, the XYZ linear transfer mechanism includes an X-direction linear transfer mechanism, a Y-direction linear transfer mechanism, and a Z-direction linear transfer mechanism. There are two sets of X-direction linear transfer mechanisms on the Y-direction linear transfer mechanism. One set of Z-direction linear transfer mechanisms is respectively provided on both sets of the X-direction linear transfer mechanisms. One set of rotating mechanisms is respectively provided on both sets of the Z-direction linear transfer mechanisms. One set of jaw mechanisms is respectively provided on both sets of the rotating mechanisms.

[0006] In some embodiments, the X-axis linear transfer mechanism includes a first support plate that is slidably driven to the Y-axis linear transfer mechanism, the first support plate is provided with an X-axis slide rail, two first sliders spaced apart are slidably provided on the X-axis slide rail, and the two groups of the Z-axis linear transfer mechanisms are correspondingly provided on the two first sliders.

[0007] In some embodiments, two mutually parallel X-axis slide rails and an X-axis synchronous belt located between the two X-axis slide rails are provided on the first support plate; the X-axis synchronous belt is driven by a transmission wheel assembly provided on the first support plate, and the transmission wheel assembly is driven by a first servo motor provided on the first support plate to drive the X-axis synchronous belt to perform reciprocating transmission motion; the two first sliders are respectively fixedly connected to the X-axis synchronous belt, and both sides of the two first sliders are correspondingly slid on the X-axis slide rails on the same side.

[0008] In some embodiments, the Y-axis linear transfer mechanism includes a first base plate, on which are provided two mutually parallel Y-axis guide rails and a Y-axis slide rail located between the two Y-axis guide rails; the material receiving platform is arranged on the first base plate and is located in front of the Y-axis guide rail and the Y-axis slide rail; the Y-axis slide rail is provided with a second slider driven to slide by a second servo motor, the first support plate is fixedly connected to the second slider, and the two sides of the first support plate are correspondingly slid on the Y-axis guide rail on the same side.

[0009] In some embodiments, the Z-direction linear transfer mechanism includes a Z-direction slide rail disposed on the first slide block, a third slide block driven to slide by a third servo motor is disposed on the Z-direction slide rail, and the rotating mechanism is disposed on the third slide block.

[0010] In some embodiments, the rotating mechanism includes a rotating cylinder arranged on a third slider; the clamping mechanism includes a clamping driving cylinder arranged at the driving end of the rotating cylinder and two clamps arranged at the driving end of the clamping driving cylinder, and the clamping driving cylinder drives the two clamps to open or clamp relative to each other.

[0011] In some embodiments, the adjustment and positioning mechanism includes a second bottom plate located in front of the first bottom plate, a base is provided on the second bottom plate, a vertical plate is slidably provided on the base, a paddle cylinder is provided on the upper part of the vertical plate, and a driving end of the paddle cylinder is provided with two paddles located above the material receiving platform. The paddle cylinder drives the two paddles to move in a direction relatively close to or away from each other, and two folding limit columns are also provided on the material receiving platform at positions corresponding to the two paddles.

[0012] In some embodiments, a first extension plate is provided on the outer side of one end of the two paddles away from the paddle cylinder, a second extension plate is provided at the outer edge of the first extension plate, and the second extension plate is perpendicular to the first extension plate and located above the first extension plate.

[0013] In some embodiments, first limiting baffles are provided on both opposite sides of the material receiving platform parallel to the Y direction, and at least two second limiting baffles arranged side by side are provided on one side of the material receiving platform parallel to the X direction and away from the adjustment and positioning mechanism. The upper ends of the first limiting baffle and the at least two second limiting baffles are bent outward.

[0014] The beneficial effects of the present utility model are as follows: Different from the prior art, the fast automatic symmetric folding mechanism for packaging of the present utility model drives two sets of jaw mechanisms to move synchronously along the X, Y, and Z directions through the XYZ linear transfer mechanism, which is convenient for synchronously adjusting the positions of the two sets of jaw mechanisms; both sets of jaw mechanisms are respectively connected to the XYZ linear transfer mechanism through the rotation mechanism, and the two rotation mechanisms drive the jaw mechanisms connected thereto to rotate synchronously to symmetrically fold the material; it can stably and efficiently complete the automatic symmetric folding operation of the packaging material, without the need for step-by-step symmetric folding one by one, effectively improving the folding efficiency and ensuring the folding quality; the overall structure is simple and reasonably designed, which is convenient for debugging and maintenance. Description of the Drawings

[0015] Figure 1 is the left front side view structural schematic diagram of the fast automatic symmetric folding mechanism for packaging in the embodiment of the present utility model;

[0016] Figure 2 is the right front side view structural schematic diagram of the fast automatic symmetric folding mechanism for packaging in the embodiment of the present utility model;

[0017] Figure 3 is the structural schematic diagram of the X-direction linear transfer mechanism and the Y-direction linear transfer mechanism in the embodiment of the present utility model;

[0018] Figure 4 is the structural schematic diagram of the Z-direction linear transfer mechanism in the embodiment of the present utility model;

[0019] Figure 5 is the structural schematic diagram of the material receiving platform and the adjustment and positioning mechanism in the embodiment of the present utility model;

[0020] Names and serial numbers of the markings in the figure: Material receiving platform - 1; Claw mechanism - 4; Rotating mechanism - 5; X-direction linear transfer mechanism - 21; Y-direction linear transfer mechanism - 22; Z-direction linear transfer mechanism - 23; First support plate - 210; X-direction slide rail - 211; First slider - 2111; X-direction synchronous belt - 212; Transmission wheel - 213; First servo motor - 214; First bottom plate - 220; Y-direction guide rail - 221; Y-direction slide rail - 222; Second slider - 2220; Z-direction slide rail - 230; Third slider - 232; Claw driving cylinder - 41; Chuck - 42; Second bottom plate - 30; Base - 31; Vertical plate - 32; Paddle cylinder - 33; Paddle - 331; Folding limit post - 10; First extension plate - 3311; Second extension plate - 3312; First limit baffle - 11; Second limit baffle - 12. Detailed implementation mode

[0021] In the description and claims of the present utility model and the above-mentioned drawings, the terms "first", "second", "third", "fourth", etc. are used to distinguish different objects, rather than to describe a specific order. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but optionally further includes steps or units not listed, or optionally further includes other steps or units inherent to these processes, methods, products or devices.

[0022] Reference to "embodiment" herein means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the present utility model. The phrase appears in various places in the specification and does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art will explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0023] "Plurality" means two or more. "And / or" describes the association relationship of associated objects and indicates that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. The character " / " generally represents an "or" relationship between the associated objects before and after.

[0024] Moreover, the orientation terms such as "up, down, front, back, left, right, upper end, lower end" are all referenced based on the attitude position of the device or equipment described in this solution when it is in normal use.

[0025] In order to make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present utility model. Obviously, the described embodiments are partial embodiments of the present utility model, rather than all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0026] As shown in the embodiments of the present utility model Figures 1 to 5 a rapid automatic folding mechanism for symmetric packaging includes a material receiving platform 1, an XYZ linear transfer mechanism, and an adjustment and positioning mechanism. The XYZ linear transfer mechanism and the adjustment and positioning mechanism are respectively located on two opposite sides of the material receiving platform 1. The adjustment and positioning mechanism is used to adjust and position the position of the material to be folded. There are two sets of jaw mechanisms 4 for relatively clamping the material on the XYZ linear transfer mechanism. The XYZ linear transfer mechanism drives the two sets of jaw mechanisms 4 to move synchronously along the XYZ directions. Both of the two sets of jaw mechanisms 4 are respectively connected to the XYZ linear transfer mechanism through a rotating mechanism 5. The two sets of rotating mechanisms 5 drive the jaw mechanisms 4 connected thereto to rotate synchronously to symmetrically fold the material.

[0027] In this embodiment, the material receiving platform 1, the XYZ linear transfer mechanism, and the adjustment and positioning mechanism are all arranged on a base 100. The material receiving platform 1 is horizontally arranged transversely in the middle of the base 100. The adjustment and positioning mechanism is located on the front side of the material receiving platform 1, and the XYZ linear transfer mechanism is located on the rear side of the material receiving platform 1. The two sets of jaw mechanisms 4 are arranged side by side and at intervals along the length direction (i.e., the X direction) of the material receiving platform 1 to facilitate relatively clamping the material.

[0028] Among them, the XYZ linear transfer mechanism includes an X-direction linear transfer mechanism 21, a Y-direction linear transfer mechanism 22, and a Z-direction linear transfer mechanism 23, forming a three-coordinate movement driving mechanism. Specifically, the Y-direction linear transfer mechanism 22 is arranged on the base 100 and is located on the rear side of the material receiving platform 1. There are two sets of X-direction linear transfer mechanisms 21 on the Y-direction linear transfer mechanism 22, which are used to drive the two sets of X-direction linear transfer mechanisms 21 to move together along the Y direction, that is, move forward and backward relative to the material receiving platform 1, so that the two sets of X-direction linear transfer mechanisms 21 are relatively close to or far from the material receiving platform 1. There is a set of Z-direction linear transfer mechanism 23 on each of the two sets of X-direction linear transfer mechanisms 21, which is used to drive the corresponding Z-direction linear transfer mechanism 23 to move together along the X direction, that is, move left and right relative to the material receiving platform 1 to adjust the left and right positions of the two sets of jaw mechanisms 4 relative to the material receiving platform 1. There is a set of rotating mechanism 5 on each of the two sets of Z-direction linear transfer mechanisms 23, and there is a set of jaw mechanism 4 on each of the two sets of rotating mechanisms 5 to adjust the position height of the two sets of jaw mechanisms 4 relative to the material receiving platform 1.

[0029] In this embodiment, the X-axis linear transfer mechanism 21 includes a first support plate 210 that is slidably driven to the Y-axis linear transfer mechanism 22, and the first support plate 210 is provided with an X-axis slide rail 211, and two spaced-apart first sliders 2111 are slidably provided on the X-axis slide rail 211, and two groups of Z-axis linear transfer mechanisms 23 are correspondingly provided on the two first sliders 2111. Specifically, the first support plate 210 is provided with two mutually parallel X-direction slide rails 211 and an X-direction synchronous belt 212 located between the two X-direction slide rails 211; the X-direction synchronous belt 212 is driven by a transmission wheel assembly arranged on the first support plate 210, and the transmission wheel assembly includes two transmission wheels 213, and the two transmission wheels 213 are arranged side by side and spaced on the first support plate 210, one on the left and one on the right, and the two ends of the X-direction synchronous belt 212 are correspondingly sleeved on the two transmission wheels 213, wherein one transmission wheel 213 is connected to the driving end of the first servo motor 214 arranged on the first support plate 210, and the transmission wheel assembly is driven by the first servo motor 214 to drive the X-direction synchronous belt 212 to perform reciprocating transmission motion. The two first sliders 2111 are fixedly connected to the X-direction synchronous belt 212 respectively, and the two sides of the two first sliders 2111 are correspondingly slidably arranged on the X-direction slide rails 211 on the same side, and the X-direction slide rails 211 on both sides play the role of sliding guide to stabilize the sliding process. The first servo motor 214 operates and drives the X-direction synchronous belt 212 to perform transmission motion along the X-direction through the transmission wheel assembly, thereby driving the two first sliders 2111 to move left and right synchronously. Moreover, the first servo motor 214 can drive the X-direction synchronous belt 212 to move forward or reversely through forward and reverse driving, so that the two first sliders 2111 can reciprocate in the X-direction, so as to achieve the purpose of adjusting the left and right positions of the two clamping jaw mechanisms 4.

[0030] In this embodiment, the Y-direction linear transfer mechanism 22 includes a first base plate 220, on which two Y-direction guide rails 221 parallel to each other and a Y-direction slide rail 222 located between the two Y-direction guide rails 221 are provided. The material receiving platform 1 is provided on the first base plate 220 and is located in front of the Y-direction guide rail 221 and the Y-direction slide rail 222. The Y-direction slide rail 222 is provided with a second slider 2220 driven to slide by a second servo motor (not shown in the drawings), the first support plate 210 is fixedly connected to the second slider 2220, and the two sides of the first support plate 210 are correspondingly slidably arranged on the Y-direction guide rail 221 on the same side, and the Y-direction guide rails 221 on both sides also play the role of sliding guide, so that the sliding process is stable. The second servo motor (not shown in the drawings) runs and drives the second slider 2220 to move on the Y-direction slide rail 222, thereby driving the first support plate 210 to move. Among them, the material receiving platform 1 can be set to be liftable or non-liftable. In actual application, it is necessary to design and select according to actual application requirements.

[0031] In this embodiment, the Z-direction linear transfer mechanism 23 includes a Z-direction slide rail 230 provided on the first slider 2111. A third slider 232 driven to slide by a third servo motor 231 is provided on the Z-direction slide rail 230. The rotating mechanism 5 is provided on the third slider 232. Specifically, the rotating mechanism 5 includes a rotating cylinder provided on the third slider 232, which is used to drive the gripper mechanism 4 to rotate in multiple directions. The gripper mechanism 4 includes a gripper driving cylinder 41 provided at the driving end of the rotating cylinder and two grippers 42 provided at the driving end of the gripper driving cylinder 41. The gripper driving cylinder 41 drives the two grippers 42 to open or clamp relative to each other. The shapes of the two grippers 42 are both plate-shaped. An ear is provided at the edge of one surface of one gripper 42 facing away from the other gripper 42, which is convenient for assisting in completing the folding operation.

[0032] In this embodiment, the adjustment and positioning mechanism includes a second base plate 30 located on the front side of the first base plate 220. A base 31 is provided on the second base plate 30. A vertical plate 32 is slidably provided on the base 31. The movement of the vertical plate 32 can be specifically realized by a driving cylinder or a motor, which is not limited in this embodiment. A paddle cylinder 33 is provided at the upper part of the vertical plate 32. Two paddles 331 located above the receiving platform 1 are provided at the driving end of the paddle cylinder 33. The paddle cylinder 33 drives the two paddles 331 to move in a relatively close or far direction. Two folding limit posts 10 are also provided on the receiving platform 1 at positions corresponding to the two paddles 331. During symmetric folding, the folding limit posts 10 assist in completing the folding operation. At the same time, the movement of the two paddles 331 is used to adjust the position of the material to be folded.

[0033] Among them, the paddle 331 is composed of a base plate and side plates provided on two opposite sides of the base plate. A notch is formed between the ends of the two side plates away from the paddle cylinder 33 and the end of the base plate away from the paddle cylinder 33. Further, first extension plates 3311 are provided on the outer sides of the ends of the two paddles 331 away from the paddle cylinder 33, that is, first extension plates 3311 are provided on the outer surfaces of the side plates of the two paddles 331. And a second extension plate 3312 is provided at the outer edge of the first extension plate 3311. The second extension plate 3312 is perpendicular to the first extension plate 3311 and is located above the first extension plate 3311, and its function is also to facilitate assisting in completing the folding operation.

[0034] In this embodiment, first limit baffles 11 are provided on two opposite sides of the receiving platform 1 parallel to the Y direction, that is, a first limit baffle 11 is provided on each of the left side and the right side of the receiving platform 1, and the two first limit baffles 11 correspond to each other left and right. Two second limit baffles 12 arranged side by side are provided on one side of the receiving platform 1 parallel to the X direction and away from the vertical plate 32, that is, two second limit baffles 12 arranged side by side are provided on the rear side of the receiving platform 1. The upper ends of the first limit baffles 11 and the two second limit baffles 12 are bent outward to prevent the packaging material from falling off the receiving platform 1.

[0035] The quick automatic folding mechanism for symmetrical packaging in the embodiment of the utility model can cooperate with system controllers such as PLC (Programmable Logic Controller) to realize the high-speed folding action with the synchronous linkage of double claws, provide complete actions in the occasions of rotation, folding and pre-pressing fixation of symmetrical packaging materials, be applicable to the folding operations of various symmetrical packaging materials, be flexible in operation, not only replace manual folding operations, but also simplify the mechanical structure and layout mode, optimize the performance and save costs.

[0036] It should be understood that those skilled in the art can make improvements or transformations according to the above description, and all such improvements and transformations should fall within the protection scope of the appended claims of the utility model.

Claims

1. A fast and automatic symmetrical packaging folding mechanism, characterized in that: It includes a material receiving platform, an XYZ linear transfer mechanism and an adjustment and positioning mechanism, wherein the XYZ linear transfer mechanism and the adjustment and positioning mechanism are correspondingly located at two opposite sides of the material receiving platform, and the adjustment and positioning mechanism is used to adjust and position the position of the folded material; the XYZ linear transfer mechanism is provided with two groups of clamping mechanisms for relatively clamping the material, and the XYZ linear transfer mechanism drives the two groups of clamping mechanisms to move synchronously along the XYZ direction; the two groups of clamping mechanisms are respectively connected to the XYZ linear transfer mechanism through a rotating mechanism, and the two groups of rotating mechanisms drive the clamping mechanisms connected thereto to rotate synchronously to symmetrically fold the material.

2. The fast automatic symmetrical packaging folding mechanism according to claim 1 is characterized by: The XYZ linear transfer mechanism includes an X-direction linear transfer mechanism, a Y-direction linear transfer mechanism and a Z-direction linear transfer mechanism; the Y-direction linear transfer mechanism is provided with two groups of X-direction linear transfer mechanisms, the two groups of X-direction linear transfer mechanisms are respectively provided with a group of Z-direction linear transfer mechanisms, the two groups of Z-direction linear transfer mechanisms are respectively provided with a group of rotating mechanisms, and the two groups of rotating mechanisms are respectively provided with a group of clamping mechanisms.

3. The fast automatic symmetrical packaging folding mechanism according to claim 2 is characterized by: The X-axis linear transfer mechanism includes a first support plate slidably connected to the Y-axis linear transfer mechanism, the first support plate is provided with an X-axis slide rail, two first sliders spaced apart are slidably provided on the X-axis slide rail, and the two groups of Z-axis linear transfer mechanisms are correspondingly provided on the two first sliders.

4. The fast automatic symmetrical packaging folding mechanism according to claim 3 is characterized by: The first support plate is provided with two X-direction slide rails parallel to each other and an X-direction synchronous belt located between the two X-direction slide rails; the X-direction synchronous belt is driven by a transmission wheel assembly arranged on the first support plate, and the transmission wheel assembly is driven by a first servo motor arranged on the first support plate to drive the X-direction synchronous belt to perform reciprocating transmission motion; the two first sliders are respectively fixedly connected to the X-direction synchronous belt, and both sides of the two first sliders are correspondingly slidably arranged on the X-direction slide rail on the same side.

5. The fast automatic symmetrical packaging folding mechanism according to claim 3 is characterized by: The Y-axis linear transfer mechanism includes a first base plate, on which are provided two mutually parallel Y-guide rails and a Y-axis slide rail located between the two Y-guide rails; the material receiving platform is arranged on the first base plate and is located in front of the Y-guide rail and the Y-axis slide rail; the Y-axis slide rail is provided with a second slider driven to slide by a second servo motor, the first support plate is fixedly connected to the second slider, and the two sides of the first support plate are correspondingly slidably arranged on the Y-guide rail on the same side.

6. The fast automatic symmetrical packaging folding mechanism according to claim 3, characterized in that: The Z-direction linear transfer mechanism comprises a Z-direction slide rail arranged on the first slide block, a third slide block driven to slide by a third servo motor is arranged on the Z-direction slide rail, and the rotating mechanism is arranged on the third slide block.

7. The fast automatic symmetrical packaging folding mechanism according to claim 6, characterized in that: The rotating mechanism includes a rotating cylinder arranged on the third slider; the clamping mechanism includes a clamping driving cylinder arranged at the driving end of the rotating cylinder and two clamps arranged at the driving end of the clamping driving cylinder, and the clamping driving cylinder drives the two clamps to open or clamp relative to each other.

8. The fast automatic symmetrical packaging folding mechanism according to claim 5, characterized in that: The adjustment and positioning mechanism includes a second bottom plate located on the front side of the first bottom plate, a base is provided on the second bottom plate, a vertical plate is slidably provided on the base, a paddle cylinder is provided on the upper part of the vertical plate, and a driving end of the paddle cylinder is provided with two paddles located above the material receiving platform. The paddle cylinder drives the two paddles to move in a direction of relative approach or distance, and two folding limit columns are also provided on the material receiving platform at positions corresponding to the two paddles.

9. The fast automatic symmetrical packaging folding mechanism according to claim 8, characterized in that: A first extension plate is provided on the outer side of one end of the two paddles away from the paddle cylinder, a second extension plate is provided at the outer edge of the first extension plate, and the second extension plate is perpendicular to the first extension plate and located above the first extension plate.

10. The fast automatic symmetrical packaging folding mechanism according to any one of claims 1 to 9, characterized in that: The two opposite sides of the material receiving platform parallel to the Y direction are provided with a first limit baffle, and the side of the material receiving platform parallel to the X direction and away from the adjustment and positioning mechanism is provided with at least two second limit baffles distributed side by side, and the upper ends of the first limit baffle and at least two second limit baffles are bent outwards.

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