Steel structure shaping and bending device
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- JIANGSU AOSHUO TRAFFIC ENG CONSTR CO LTD
- Filing Date
- 2025-07-25
- Publication Date
- 2026-07-03
AI Technical Summary
Existing steel structure bending devices lack an automatic bending angle adjustment structure, making it difficult to flexibly adjust the die angle, affecting the accuracy and consistency of the bending angle. At the same time, the lack of uniform clamping and pressure buffering structures makes it easy for steel structural components to experience excessive local stress and unstable positioning during bending.
An angle adjustment component and a buffer bending component are adopted. The angle adjustment component uses an angle adjustment motor and a limit slide in conjunction with a compression spring to achieve stable angle adjustment of the bending die. The buffer bending component uses a bending cylinder and a buffer spring to achieve uniform clamping and pressure buffering, ensuring the stability of the steel structure during the bending process.
It improves the accuracy and ease of adjustment of the bending angle of steel structures, ensures the stability and integrity of the bending process, and avoids workpiece damage caused by die angle deviation and excessive local stress.
Smart Images
Figure CN224444220U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of metal processing technology, and in particular to a steel structure shaping and bending device. Background Technology
[0002] In modern industry, steel structures are widely used in many fields such as construction, machinery manufacturing, bridge construction, and automobile industry due to their high strength, high stability and good plasticity. In the process of steel structure processing, bending is an extremely critical process. It can process the originally straight steel into components with specific angles and curvatures to meet the structural design requirements of different products.
[0003] When this bending device bends the steel structure, it lacks a fixing mechanism, which can easily lead to the steel structure shifting and affect the processing accuracy. Therefore, it is necessary to provide a steel structure bending device that can reliably fix the steel structure.
[0004] The existing patent (publication number: CN219151248U) steel structure bending device, through the clamping component and protective pads, forms an adjustable bending gap between a pair of protective pads, which is beneficial to improving the bending quality of steel structures. The clamping component reliably presses both ends of one side of the steel structure to the protective pads, ensuring that the steel structure remains stable during the bending operation and does not deflect or shift, thereby ensuring the bending quality and safety of the steel structure. It has a lifting component, which drives the rotating rod to rotate forward or backward through a motor. Under the transmission of bevel gears, the slider slides up and down along the first threaded rod, thereby realizing the height adjustment function of the bending pressure head. The bending pressure head is adjusted to the top of the steel structure, which is convenient for bending the steel structure through the bending pressure head via the electric drive component. It is suitable for steel structures of different thicknesses.
[0005] To address the aforementioned issues, existing patents have provided solutions. However, existing steel structure bending devices typically lack an automatic bending angle adjustment structure, making it difficult to flexibly adjust the die angle according to different bending requirements. This necessitates repeated manual adjustments, and the die is prone to shifting after adjustment, affecting the accuracy and consistency of the bending angle. Furthermore, the lack of uniform clamping and pressure buffering structures makes it difficult to achieve adaptive clamping of steel structural components. Consequently, excessive localized force can easily occur during clamping, affecting the stability of workpiece positioning.
[0006] To address this, a steel structure shaping and bending device is proposed. Utility Model Content
[0007] The purpose of this utility model is to provide a steel structure shaping and bending device that can solve the problems of existing steel structure shaping and bending devices that usually lack an automatic bending angle adjustment structure, making it inconvenient to flexibly adjust the die angle according to different bending requirements. This requires repeated manual adjustments, and the die is prone to displacement after adjustment, affecting the accuracy and consistency of the bending angle. In addition, the lack of uniform clamping and pressure buffering structure makes it difficult to achieve adaptive clamping of steel structural parts, which can easily lead to excessive local stress during clamping and affect the positioning stability of the workpiece.
[0008] To achieve the above objectives, this utility model provides the following technical solution: a steel structure shaping and bending device, comprising a workbench, an angle adjustment component at the bottom of the workbench, and a buffer bending component at the top of the workbench. The angle adjustment component includes a fixed base fixedly connected to the bottom of the workbench, an angle adjustment motor fixedly connected to the outside of the fixed base, a connecting seat fixedly connected to the output end of the angle adjustment motor, a bending die fixedly connected to the top of the connecting seat, limit slides slidably connected to both sides of the fixed base, a limit support rod fixedly connected to the top of the limit slide, the limit support rod being fixedly connected to the bending die, and a compression spring sleeved on the outside of the limit support rod.
[0009] Preferably, the buffer bending assembly includes a support column fixedly connected to the top of the workbench, and a top plate is fixedly connected to the front side of the support column.
[0010] Preferably, a bending cylinder is fixedly connected to the top of the top plate, and a linkage seat is fixedly connected to the output end of the bending cylinder. Limiting slide rods are fixedly connected to both sides of the top of the linkage seat, and the limiting slide rods are slidably connected to the top plate.
[0011] Preferably, a connecting rod is slidably connected inside the linkage seat, a pressing seat is fixedly connected to the bottom of the connecting rod, and a buffer spring is sleeved on the outside of the connecting rod.
[0012] Preferably, a positioning base is fixedly connected to both sides of the worktable, a lead screw adjusting mechanism is provided inside the positioning base, an upper positioning seat is threadedly connected to the output end of the lead screw adjusting mechanism, and a clamping and limiting roller group is fixedly connected to the bottom side of the positioning base.
[0013] Preferably, mounting bases are fixedly connected to both sides of the workbench, and auxiliary conveying rollers are rotatably connected to the inner side of the mounting bases.
[0014] Preferably, a bushing is fixedly connected to the bottom of the bending die, and a round-headed rotating rod is rotatably connected to the inner side of the bushing. The side of the round-headed rotating rod away from the bushing is fixedly connected to the limiting slide.
[0015] Preferably, the bottom of the workbench is fixedly connected to a support leg, and the bottom of the support leg is fixedly connected to a rubber foot pad.
[0016] Compared with the prior art, the beneficial effects of this utility model are:
[0017] 1. This application achieves flexible adjustment and stable support of the bending die angle through the angle adjustment component, improving the accuracy and ease of adjustment of the bending angle of the steel structure. Compared with the traditional bending device, which relies on manual operation for angle adjustment, has large angle deviation and poor stability after adjustment, this application achieves smoother bending angle adjustment and less position deviation after adjustment. It can realize the function of automatically adjusting the die angle according to different bending requirements and maintaining the stability of the die during the bending process. It solves the problems of workpiece bending angle mismatch caused by inaccurate angle adjustment and shaking during bending due to insufficient die support in traditional devices.
[0018] 2. This application achieves stable clamping and bending pressure buffering of steel structural components through the buffer bending assembly, improving the integrity of the bending surface of the steel structure and the stability of the bending process. Compared with traditional bending devices, which are prone to excessive local stress and obvious vibration during bending, this application achieves more uniform clamping force on the steel structural components and effectively reduces the impact force during bending. It can realize the function of stable positioning of the steel structural components before bending and reduce pressure damage to the workpiece during bending, solving the problems of workpiece bending deviation caused by uneven clamping force and indentation or deformation on the workpiece surface caused by rigid pressure in traditional devices. Attached Figure Description
[0019] Figure 1 This is an overall structural diagram of the steel structure shaping and bending device of this utility model;
[0020] Figure 2 This is a schematic diagram of the angle adjustment component of this utility model;
[0021] Figure 3 This is a schematic diagram of the structure of the buffer bending assembly of this utility model;
[0022] Figure 4 This is a schematic diagram of the structure of the fixing base of this utility model;
[0023] Figure 5 This is a schematic diagram of the positioning base of this utility model.
[0024] In the diagram, 1. Workbench; 2. Mounting seat; 3. Auxiliary conveyor roller; 4. Angle adjustment assembly; 401. Fixed seat; 402. Angle adjustment motor; 403. Connecting seat; 404. Bending die; 405. Limiting slide; 406. Limiting support rod; 407. Compression spring; 5. Buffer bending assembly; 501. Support column; 502. Top plate; 503. Bending cylinder; 504. Linkage seat; 505. Limiting slide rod; 506. Connecting rod; 507. Pressing seat; 508. Buffer spring; 6. Positioning base; 7. Screw adjuster; 8. Upper positioning seat; 9. Clamping limiting roller group; 10. Bushing; 11. Round-headed rotating rod; 12. Support leg; 13. Rubber foot pad. Detailed Implementation
[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not 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 effort are within the protection scope of the present utility model.
[0026] Please see Figure 1-5 The present invention provides the following technical solution:
[0027] A steel structure shaping and bending device includes a workbench 1. An angle adjustment component 4 is provided at the bottom of the workbench 1, and a buffer bending component 5 is provided at the top of the workbench 1. The angle adjustment component 4 includes a fixed base 401 fixedly connected to the bottom of the workbench 1. An angle adjustment motor 402 is fixedly connected to the outside of the fixed base 401. A connecting base 403 is fixedly connected to the output end of the angle adjustment motor 402. A bending die 404 is fixedly connected to the top of the connecting base 403. Limiting slides 405 are slidably connected to both sides of the fixed base 401. A limiting support rod 406 is fixedly connected to the top of the limiting slide 405. The limiting support rod 406 is fixedly connected to the bending die 404. A compression spring 407 is sleeved on the outside of the limiting support rod 406.
[0028] In this embodiment: by starting the angle adjustment motor 402, its output end drives the connecting seat 403 to rotate. The bending die 404 on the top of the connecting seat 403 rotates synchronously with the connecting seat 403, and the angle adjustment begins. When the bending die 404 rotates, the bushing 10 at its bottom drives the round-headed rotating rod 11 to rotate. The round-headed rotating rod 11 is fixedly connected to the limiting slide 405, pulling the limiting slide 405 to slide along both sides of the fixed seat 401. At this time, the limiting support rods 406 on both sides of the bending die 404 tilt with the rotation of the bending die 404. The top of the limiting support rod 406 is fixed to the bending die 404, and the bottom slides with the limiting slide 405, thus adjusting the bending die. The rotation direction of the die 404 forms a guide to prevent the bending die 404 from deviating from the preset trajectory. When the limiting support rod 406 slides on the limiting slide 405, the compression spring 407 on the outside will be compressed or stretched according to the bending direction. When the bending die 404 rotates to one side, the compression spring 407 on the corresponding side is compressed by the limiting slide 405, generating a reverse elastic force to buffer the impact force during rotation and prevent the angle adjustment motor 402 from being subjected to excessive force. When the angle is adjusted to the target position, the elastic force of the compression spring 407 keeps the limiting slide 405 stable, thereby fixing the position of the limiting support rod 406 and the bending die 404 and preventing angle deviation due to force during the bending process.
[0029] Specifically, such as Figure 3 As shown, the buffer bending assembly 5 includes a support column 501 fixedly connected to the top of the workbench 1, and a top plate 502 is fixedly connected to the front side of the support column 501.
[0030] Specifically, such as Figure 3 As shown, a bending cylinder 503 is fixedly connected to the top of the top plate 502, and a linkage seat 504 is fixedly connected to the output end of the bending cylinder 503. Limiting slide rods 505 are fixedly connected to both sides of the top of the linkage seat 504, and the limiting slide rods 505 are slidably connected to the top plate 502.
[0031] Specifically, such as Figure 3 As shown, a connecting rod 506 is slidably connected inside the linkage seat 504, a pressing seat 507 is fixedly connected to the bottom of the connecting rod 506, and a buffer spring 508 is sleeved on the outside of the connecting rod 506.
[0032] In this embodiment: After the angle adjustment is completed, the bending cylinder 503 is activated, and its output end pushes the linkage seat 504 downward. The limiting slide rods 505 on both sides of the top of the linkage seat 504 slide along the inner side of the top plate 502, restricting the movement direction of the linkage seat 504 and ensuring that the linkage seat 504 moves vertically downward. When the linkage seat 504 descends, its internal connecting rod 506 drives the bottom pressing seat 507 to gradually approach the steel structure. When the pressing seat 507 contacts the surface of the steel structure, the linkage seat 504 continues to descend, and the connecting rod 506 slides upward relative to the linkage seat 504, and its outer buffer spring 508 is compressed. The spring force of the buffer spring 508 is transmitted to the clamping seat 507 through the connecting rod 506, so that the clamping seat 507 presses the steel structure with a uniform force. This not only prevents the steel structure from shifting during bending, but also absorbs part of the pressure through the elastic deformation of the spring, preventing excessive clamping force from causing indentations on the surface of the steel structure. Subsequently, the bending cylinder 503 continues to apply pressure, and the bending force is transmitted to the steel structure through the linkage seat 504 and the connecting rod 506. Under the support of the bending die 404, the steel structure gradually undergoes bending deformation. During the bending process, the buffer spring 508 adjusts the degree of deformation according to the real-time pressure to maintain a stable clamping force.
[0033] Specifically, such as Figure 5 As shown, positioning bases 6 are fixedly connected to both sides of the workbench 1. A lead screw adjusting mechanism 7 is installed inside the positioning base 6. The output end of the lead screw adjusting mechanism 7 is threadedly connected to an upper positioning seat 8. A clamping and limiting roller group 9 is fixedly connected to the bottom side of the positioning base 6.
[0034] Specifically, such as Figure 4 As shown, mounting bases 2 are fixedly connected to both sides of the workbench 1, and auxiliary conveying rollers 3 are rotatably connected to the inner side of the mounting bases 2.
[0035] In this embodiment: by setting up a positioning base 6, a screw adjuster 7, an upper positioning seat 8, and a clamping and limiting roller group 9, when the steel structure to be bent is conveyed to the bending station of the workbench 1 by the auxiliary conveying roller 3, the screw adjuster 7 inside the positioning base 6 is activated. Its output end drives the upper positioning seat 8 to slide downward along the inner side of the positioning base 6 through threaded transmission. At this time, the upper positioning seat 8 gradually approaches the clamping and limiting roller group 9 below. When the steel structure is located between the upper positioning seat 8 and the clamping and limiting roller group 9, the upper positioning seat 8 continues to move downward until it contacts the upper surface of the steel structure. The clamping and limiting roller group 9, which is fixed to the bottom side of the positioning base 6, forms a clamp from the upper and lower sides. The clamping and limiting roller group 9 itself can rotate. During clamping, it can avoid hard friction with the surface of the steel structure and cause damage, and can also limit the movement of the steel structure during the bending process through the limiting effect of the roller body. The lateral offset ensures that the bending position of the steel structure is accurately aligned with the bending die 404. By setting the mounting base 2 and the auxiliary conveying roller 3, when the steel structure to be bent is placed, both ends of the steel structure will contact the auxiliary conveying roller 3 on the inner side of the mounting base 2 on both sides of the worktable 1. When the operator pushes the steel structure to the bending station, the auxiliary conveying roller 3 rotates with the movement of the steel structure, converting the sliding friction between the steel structure and the worktable 1 into rolling friction, which greatly reduces the resistance when the steel structure moves, so that the steel structure can be conveyed to the preset bending position more smoothly and effortlessly. When the bending is completed, when the operator pulls the processed steel structure away from the bending station, the auxiliary conveying roller 3 rotates with the steel structure again, which also plays the role of reducing friction, making it easier to remove the workpiece, and at the same time preventing the surface of the steel structure from being scratched by friction during the movement.
[0036] Specifically, such as Figure 4 As shown, a bushing 10 is fixedly connected to the bottom of the bending die 404, and a round-headed rotating rod 11 is rotatably connected to the inner side of the bushing 10. The side of the round-headed rotating rod 11 away from the bushing 10 is fixedly connected to the limiting slide 405.
[0037] Specifically, such as Figure 1 As shown, the bottom of the workbench 1 is fixedly connected to a support leg 12, and the bottom of the support leg 12 is fixedly connected to a rubber foot pad 13.
[0038] In this embodiment: By setting a bushing 10 and a round-headed rotating rod 11, when the angle adjusting motor 402 drives the connecting seat 403 and the bending die 404 to rotate to adjust the bending angle, the bushing 10 fixed at the bottom of the bending die 404 will move synchronously with the bending die 404. One end of the round-headed rotating rod 11 on the inner side of the bushing 10 is rotatably connected to the bushing 10, and the other end is fixed to the limiting slide 405. When the bending die 404 rotates, the round-headed rotating rod 11 rotates around the inner side of the bushing 10. Its round head structure reduces the frictional resistance between it and the bushing 10, making the rotation of the bending die 404 smoother and avoiding the impact of excessive friction on the accuracy of angle adjustment. At the same time, the round-headed rotating rod 11 is fixedly connected to the limiting slide 405. Next, part of the force on the bending die 404 is transferred to the limiting slide 405. With the sliding of the limiting slide 405 on the fixed seat 401, the limiting support rod 406 further assists the bending die 404 in forming support, ensuring that the bending die 404 will not deviate during rotation and maintaining a stable rotation trajectory. By setting the support legs 12 and rubber feet 13, when the entire steel structure shaping and bending device is placed on the work site, the support legs 12 at the bottom of the workbench 1 vertically support the entire device. During the operation of the device, vibration will be generated. The rubber feet 13 at the bottom of the support legs 12 are elastic and can absorb these vibration energy through their own deformation, reducing the shaking of the entire device and preventing the connection of the workbench 1 or various components from becoming loose due to vibration.
[0039] Working Principle: When using this steel structure shaping and bending device, the steel structure to be bent is first placed on the workbench 1. At this time, the auxiliary conveying rollers 3 inside the mounting seats 2 on both sides of the workbench 1 will contact the steel structure. When the operator pushes the steel structure, the auxiliary conveying rollers 3 rotate accordingly, reducing the resistance of the steel structure during movement through rolling friction, allowing the steel structure to be smoothly conveyed to the bending station. When the steel structure reaches the preset position, the screw adjusting mechanism 7 inside the positioning bases 6 on both sides of the workbench 1 starts. Then, the output end of the screw adjusting mechanism 7 drives the upper positioning seat 8 to move downwards, cooperating with the clamping and limiting roller group 9 on the bottom side of the positioning base 6 to clamp the steel structure from both the top and bottom. The clamping and limiting roller group 9, through its rotating structure, can prevent clamping... This method not only prevents damage to the surface of the steel structure component during bending but also further restricts its lateral displacement during the bending process, ensuring precise alignment of the bending position with the bending die 404. After positioning the steel structure component, the bending angle is adjusted according to the bending requirements. Then, the angle adjustment motor 402 on the outside of the fixed base 401 is activated, and its output drives the connecting base 403 to rotate. The bending die 404 on the top of the connecting base 403 rotates synchronously with the connecting base 403 to begin adjusting the angle. As the bending die 404 rotates, its round-headed rotating rod 11 provides support for the angle adjustment of the bending die 404 through circumferential rotation, preventing excessive friction from affecting the adjustment accuracy. At the same time, the limiting support rods 406 connected to both sides of the bending die 404 move with the bending die 404. The rotation of the 4th bend causes displacement, driving the limiting slide 405 to slide on both sides of the fixed base 401. The limiting slide 405 guides the limiting support rod 406 along the sliding direction of the fixed base 401, preventing the limiting support rod 406 from shifting under force, thus ensuring the stability of the rotation trajectory of the bending die 404. The compression spring 407 sleeved on the outside of the limiting support rod 406 will extend and retract according to the rotation direction of the bending die 404 during the sliding of the limiting slide 405. When the bending die 404 rotates to one side, the compression spring 407 on the corresponding side is compressed by the limiting slide 405, generating a reverse elastic force. This elastic force can buffer the impact force when the bending die 404 rotates, preventing the angle adjustment motor 402 from being damaged due to excessive instantaneous force. At the same time, at the angle After the angle adjustment is completed, the elastic force of the compression spring 407 helps the bending die 404 maintain the current angle, reducing positional deviation after angle adjustment. After the angle adjustment is completed, the bending cylinder 503 is activated, and its output end pushes the linkage seat 504 downward. The limiting slide rods 505 on both sides of the top of the linkage seat 504 slide along the top plate 502. The sliding cooperation between the limiting slide rods 505 and the top plate 502 restricts the movement direction of the linkage seat 504, preventing the linkage seat 504 from swaying left and right during descent, ensuring that the linkage seat 504 can move vertically downward. As the linkage seat 504 descends, the internally sliding connecting rod 506 drives the bottom clamping seat 507 to gradually approach the steel structure. When the clamping seat 507 contacts the surface of the steel structure,The connecting rod 506 continues to descend with the linkage seat 504 and slides upward inside the linkage seat 504. At this time, the buffer spring 508 sleeved on the outside of the connecting rod 506 is compressed. The elastic force of the buffer spring 508 is transmitted to the clamping seat 507 through the connecting rod 506, so that the clamping seat 507 clamps the steel structure with appropriate force. This can prevent the steel structure from shifting during bending and absorb part of the pressure through the elastic deformation of the buffer spring 508, preventing indentations or deformation on the surface of the steel structure due to excessive clamping force. After the clamping seat 507 stably clamps the steel structure, the bending cylinder 503 continues to push the linkage seat 504 to descend. The bending force is transmitted to the steel structure through the linkage seat 504 and the connecting rod 506, so that the steel structure begins to bend and deform under the support of the bending die 404. During the bending process, the angle The limiting slide 405 and limiting support rod 406 in the degree adjustment assembly 4 always support the bending die 404, and the compression spring 407 continuously provides cushioning to prevent the bending die 404 from being damaged due to excessive force. At the same time, the buffer spring 508 in the buffer bending assembly 5 continuously adjusts its elasticity according to the bending pressure to ensure that the clamping seat 507 is always in close contact with the steel structure and to prevent the steel structure from sliding during bending. After bending is completed, the bending cylinder 503 drives the linkage seat 504 to reset upward, the buffer spring 508 returns to its original state and drives the connecting rod 506 and the clamping seat 507 to move upward and disengage from the surface of the steel structure. Then, the screw adjuster 7 drives the upper positioning seat 8 to move upward, releasing the clamping of the steel structure. The operator then removes the bent steel structure from the worktable 1 using the auxiliary conveying roller 3.
[0040] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A steel structure shaping and bending device comprising a worktable (1), characterized in that: An angle adjustment assembly (4) is provided at the bottom of the workbench (1), and a buffer bending assembly (5) is provided at the top of the workbench (1). The angle adjustment assembly (4) includes a fixed seat (401) fixedly connected to the bottom of the workbench (1). An angle adjustment motor (402) is fixedly connected to the outside of the fixed seat (401). A connecting seat (403) is fixedly connected to the output end of the angle adjustment motor (402). A bending die (404) is fixedly connected to the top of the connecting seat (403). Limiting slides (405) are slidably connected to both sides of the fixed seat (401). A limiting support rod (406) is fixedly connected to the top of the limiting slide (405). The limiting support rod (406) is fixedly connected to the bending die (404). A compression spring (407) is sleeved on the outside of the limiting support rod (406).
2. The steel structure shaping and bending device according to claim 1, characterized in that: The buffer bending assembly (5) includes a support column (501) fixedly connected to the top of the workbench (1), and a top plate (502) is fixedly connected to the front side of the support column (501).
3. The steel structure shaping and bending device according to claim 2, characterized in that: A bending cylinder (503) is fixedly connected to the top of the top plate (502). A linkage seat (504) is fixedly connected to the output end of the bending cylinder (503). Limiting slide rods (505) are fixedly connected to both sides of the top of the linkage seat (504). The limiting slide rods (505) are slidably connected to the top plate (502).
4. The steel structure shaping and bending device according to claim 3, characterized in that: The linkage seat (504) is internally slidably connected to a connecting rod (506), the bottom of the connecting rod (506) is fixedly connected to a pressing seat (507), and a buffer spring (508) is sleeved on the outside of the connecting rod (506).
5. The apparatus according to claim 1, wherein: The workbench (1) is fixedly connected to both sides of a positioning base (6). The positioning base (6) is equipped with a screw adjuster (7). The output end of the screw adjuster (7) is threadedly connected to an upper positioning seat (8). The bottom side of the positioning base (6) is fixedly connected to a clamping and limiting roller group (9).
6. The apparatus according to claim 1, wherein: The workbench (1) is fixedly connected to two sides of a mounting base (2), and an auxiliary conveying roller (3) is rotatably connected to the inner side of the mounting base (2).
7. A steel structure shaping and bending device according to claim 1, characterized in that: The bottom of the bending die (404) is fixedly connected to a bushing (10), and a round-headed rotating rod (11) is rotatably connected to the inner side of the bushing (10). The side of the round-headed rotating rod (11) away from the bushing (10) is fixedly connected to the limiting slide (405).
8. The apparatus according to claim 1, wherein: The bottom of the workbench (1) is fixedly connected to a support leg (12), and the bottom of the support leg (12) is fixedly connected to a rubber foot pad (13).