A lens polishing chucking mechanism

Abstract

The utility model provides a kind of lens polishing's clamping mechanism, including workbench, fixed box, connecting plate, clamp one, clamp two, lifting assembly and two fixed components, workbench top is fixedly connected with fixed box bottom, workbench inside is equipped with sliding assembly, the inner wall of the surface of clamp one and clamp two respectively with the surface of two fixed components is movably connected, two fixed components two ends are fixedly connected with fixed box inner wall and connecting plate bottom, lifting assembly bottom is fixedly connected with workbench top, lifting assembly one end is fixedly connected with connecting plate one side, and connecting plate top is equipped with water spraying assembly;Start rotary motor and drive gear two rotation, make gear one drive four connecting columns and four arc-shaped plates slide in the inner wall of sliding slot in fixed cylinder, clamp one and clamp two are quickly disassembled, and different shapes of clamp are replaced to fix and hold the lens shape of different types.

Description

Technical Field

[0001] This utility model relates to the field of lens processing technology, and in particular to a clamping mechanism for lens grinding. Background Technology

[0002] Lenses are transparent materials with one or more curved surfaces, made of optical materials such as glass or resin. After being polished, they are often assembled with eyeglass frames to form eyeglasses, used to correct the user's vision and obtain a clear field of vision.

[0003] The existing publication number CN220145506U discloses a lens grinding and polishing device, which includes a worktable, a clamping mechanism and a grinding mechanism. The worktable is provided with a clamping mechanism for fixing the lens in the middle position. The clamping mechanism includes a fork-shaped frame. The closed end of the fork-shaped frame is correspondingly and fastened to the worktable. The open end of the fork-shaped frame is provided with a flexible steel strip I for supporting the lens and a flexible steel strip II for holding the lens. The two ends of the flexible steel strip I are respectively fastened to the two ends of the open end of the fork-shaped frame. One end of the flexible steel strip II is fastened to one end of the open end of the fork-shaped frame. The fork-shaped frame is rotatably connected to a roller for tightening the other end of the flexible steel strip II. The worktable is provided with grinding mechanisms on both sides corresponding to the clamping mechanism for grinding and polishing the corresponding surfaces of the lens. The device uses flexible steel bands I and II to clamp and fix the lens. Due to the variety of lens sizes, when encountering irregularly shaped lenses, it is difficult for flexible steel bands I and II to achieve precise and stable fit and wrapping, which can easily lead to uneven local stress. In addition, the vibration generated by the grinder during grinding further affects the stability of flexible steel bands I and II. Furthermore, the device does not have a dust cleaning mechanism, and the dust generated by the grinder during grinding can affect mechanical parts and the health of workers.

[0004] Therefore, it is necessary to provide a new clamping mechanism for lens grinding to solve the above-mentioned technical problems. Utility Model Content

[0005] To solve the above-mentioned technical problems, this utility model provides a clamping mechanism for lens grinding.

[0006] The present invention provides a lens grinding clamping mechanism comprising: a worktable, a fixed box, a connecting plate, a clamp one, a clamp two, a lifting assembly, and two fixing assemblies. The top of the worktable is fixedly connected to the bottom of the fixed box. A sliding assembly is provided inside the worktable. The inner walls of the clamp one and clamp two are respectively movably connected to the surfaces of the two fixing assemblies. The two fixing assemblies are respectively fixedly connected to the bottom wall of the fixed box and the bottom of the connecting plate. The bottom of the lifting assembly is fixedly connected to the top of the worktable. One end of the lifting assembly is fixedly connected to one side of the connecting plate. A water spraying assembly is provided on the top of the connecting plate. The fixing assembly includes a fixing cylinder, a gear, a rotating column, a drive mechanism, four connecting columns, and four arc-shaped plates. The fixing cylinder has four sliding grooves inside, and the surfaces of the four arc-shaped plates are slidably connected to the inner walls of the four sliding grooves of the fixing cylinder. One side of each of the four arc-shaped plates is fixedly connected to one end of each of the four connecting columns. The gear has four arc-shaped grooves on its surface, and the surfaces of the four connecting columns are slidably connected to the interior of the four arc-shaped grooves. One side of the gear is rotatably connected to the inner wall of the fixing cylinder via a rotating shaft. The side of the gear away from the inside of the fixing cylinder is fixedly connected to one end of the rotating column. The end of the rotating column away from the gear is rotatably connected to the inner wall of the fixing cylinder. One side of the drive mechanism is rotatably connected to the inner wall of the fixing cylinder, and the surface of the drive mechanism is rotatably connected to the surface of the gear.

[0007] Preferably, the driving mechanism includes a second gear and a rotary motor. One side of the second gear is rotatably connected to the inner wall of the fixed cylinder, the side of the second gear away from the inner wall of the fixed cylinder is fixedly connected to the output end of the rotary motor, and the end of the rotary motor away from the second gear is fixedly connected to the inner wall of the fixed cylinder.

[0008] Preferably, the sliding assembly includes a drive motor, a drive wheel, a driven wheel, a track, a double-acting screw, a slide bar, two sliding blocks, and two grinders. The worktable is equipped with a first fixed plate and a second fixed plate, which are perpendicular to each other. One end of the drive motor is fixedly connected to one side of the first fixed plate, and the output end of the drive motor is fixedly connected to one side of the drive wheel. One side of the driven wheel is fixedly connected to one end of the double-acting screw. The inner side of the track is rotatably connected to the surfaces of the drive wheel and the driven wheel. The end of the double-acting screw away from the driven wheel is rotatably connected to the inner wall of the worktable. The inner walls of the through holes on the surfaces of the two sliding blocks are threadedly connected to the surface of the double-acting screw. The surfaces of the two sliding blocks are slidably connected to the inner wall of the through slots on the top of the worktable. Both ends of the slide bar are fixedly connected to the first fixed plate and the inner wall of the worktable, respectively. The inner walls of the through holes on the surfaces of the two sliding blocks are slidably connected to the surface of the slide bar.

[0009] Preferably, a drain pipe is provided on one side of the fixed box, one end of the drain pipe is fixedly connected to the inside of a through hole opened on one side of the fixed box, and the other end of the drain pipe away from the fixed box is fixedly connected to the inner wall of the through hole opened on the surface of the workbench. The workbench is provided with a dust collection box and a slide groove. The output end of the drain pipe is located above the dust collection box, and the surface of the dust collection box is slidably connected to the inner wall of the slide groove of the workbench.

[0010] Preferably, the water spray assembly includes a water pump, a water tank, a water pipe, and a connecting pipe. The bottom of the water pump and the bottom of the water tank are fixedly connected to the top of the connecting plate. The two ends of the water pipe are fixedly connected to the opposite sides of the water pump and the water tank, respectively. The output end of the water pump is fixedly connected to one end of the connecting pipe. The surface of the connecting pipe is fixedly connected to the inner wall of the through hole opened on the surface of the connecting plate.

[0011] Preferably, the lifting assembly includes a connecting box, a threaded rod, a lifting motor, a sliding plate, and a connecting rod. The bottom of the connecting box is fixedly connected to the top of the workbench. Sliding grooves are provided on both sides of the inner wall of the connecting box. One end of the threaded rod is rotatably connected to the bottom wall of the connecting box. The end of the threaded rod away from the bottom wall of the connecting box is fixedly connected to the output end of the lifting motor. One end of the lifting motor is fixedly connected to the top of the connecting box. Both ends of the sliding plate are slidably connected to the inner walls of the sliding grooves on both sides of the connecting box. The surface of the threaded rod is threadedly connected to the inner wall of the through hole opened on the surface of the sliding plate. One side of the sliding plate is fixedly connected to one end of the connecting rod. The end of the connecting rod away from the sliding plate is fixedly connected to one side of the connecting plate. The surface of the connecting rod is slidably connected to the inside of the sliding groove opened on the surface of the connecting box.

[0012] Compared with related technologies, the lens grinding clamping mechanism provided by this utility model has the following beneficial effects: By starting the rotary motor to drive gear two to rotate, gear one drives four connecting columns and four arc plates to slide on the inner wall of the groove inside the fixed cylinder, allowing for quick disassembly and disassembly of clamp one and clamp two. This facilitates the replacement of clamps of different shapes to fix and clamp different types of lenses.

[0013] The lifting motor drives the threaded rod to rotate, causing the slide plate and connecting rod to move the connecting plate up and down, effectively clamping the lens. The drive motor drives the drive wheel, driven wheel, track, and double-acting screw to rotate, causing the two sliding blocks to move relative to each other on the slide rod and double-acting screw, allowing the two grinders to grind the clamped lens. The water pump is started to fill the water tank with water, which is then discharged through the water pipe to suppress the dust generated during grinding. The dust is then discharged into the dust collection box through the drain pipe to prevent dust from splashing during grinding and affecting the mechanical parts and the health of the workers. Attached Figure Description

[0014] Figure 1 A schematic diagram of a preferred embodiment of a clamping mechanism for lens polishing provided by this utility model; Figure 2 This is a side view of the workbench shown in this utility model; Figure 3 This is a top view of the worktable shown in this utility model; Figure 4 This is a cross-sectional view of the workbench shown in this utility model; Figure 5 This is a cross-sectional view of the fixing component shown in this utility model; Figure 6 This is a cross-sectional view of the lifting assembly shown in this utility model.

[0015] Numbered in the diagram: 1. Workbench; 101. Fixed Plate 1; 102. Fixed Plate 2; 103. Drive Motor; 104. Drive Wheel; 105. Driven Wheel; 106. Track; 107. Double-acting Screw; 108. Sliding Block; 109. Slide Rod; 110. Dust Collection Box; 111. Grinding Machine; 2. Fixed Box; 201. First Clamp; 202. Second Clamp; 203. Drain Pipe; 3. Fixed Cylinder 301. Gear 1; 302. Arc groove; 303. Rotating column; 304. Gear 2; 305. Rotary motor; 306. Connecting column; 307. Arc plate; 4. Connecting plate; 401. Water pump; 402. Water tank; 403. Water pipe; 404. Connecting pipe; 5. Connecting box; 501. Sliding groove; 502. Threaded rod; 503. Lifting motor; 504. Slide plate; 505. Connecting rod. Detailed Implementation

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0017] Please refer to the following: Figure 1-6 ,in, Figure 1 A schematic diagram of a preferred embodiment of a clamping mechanism for lens polishing provided by this utility model; Figure 2 This is a side view of the workbench shown in this utility model; Figure 3 This is a top view of the worktable shown in this utility model; Figure 4 This is a cross-sectional view of the workbench shown in this utility model; Figure 5 This is a cross-sectional view of the fixing component shown in this utility model; Figure 6 This is a cross-sectional view of the lifting assembly shown in this utility model. In specific implementation processes, such as... Figure 1-6 As shown, it includes: a workbench 1, a fixed box 2, a connecting plate 4, a clamp 1 201, a clamp 2 202, a lifting assembly, and two fixed assemblies 3. The top of the workbench 1 is fixedly connected to the bottom of the fixed box 2. The workbench 1 is equipped with a sliding assembly. The inner walls of the clamp 1 201 and clamp 2 202 are movably connected to the surfaces of the two fixed assemblies 3. The two fixed assemblies 3 are fixedly connected to the bottom wall of the fixed box 2 and the bottom of the connecting plate 4, respectively. The bottom of the lifting assembly is fixedly connected to the top of the workbench 1. One end of the lifting assembly is fixedly connected to one side of the connecting plate 4. The top of the connecting plate 4 is equipped with a water spray assembly. The bottom wall of the fixed box 1 is inclined. The clamp 1 and clamp 2 are equipped with elastic pads inside. The fixing assembly includes a fixing cylinder 3, a gear 301, a rotating column 303, a drive mechanism, four connecting columns 306, and four arc-shaped plates 307. The fixing cylinder 3 has four sliding grooves inside. The surfaces of the four arc-shaped plates 307 are slidably connected to the inner walls of the four sliding grooves in the fixing cylinder 3. One side of each arc-shaped plate 307 is fixedly connected to one end of each of the four connecting columns 306. The gear 301 has four arc-shaped grooves 302 on its surface. The surfaces of the four connecting columns 306 are slidably connected to the interior of the four arc-shaped grooves 302. One side of the gear 301 is rotatably connected to the inner wall of the fixing cylinder 3 via a rotating shaft. The side of the gear 301 away from the interior of the fixing cylinder 3 is connected to the rotating column 306. 03 One end is fixedly connected, the end of the rotating column 303 away from the gear 301 is rotatably connected to the inner wall of the fixed cylinder 3, one side of the drive mechanism is rotatably connected to the inner wall of the fixed cylinder 3, the surface of the drive mechanism is rotatably connected to the surface of the gear 301, and the outer sides of the four arc plates 307 are all fixed to the inner wall of the through hole opened at one end of the clamp 1 and the clamp 2. The drive mechanism drives the gear 301, the four connecting columns 306 and the four arc plates 307 to slide on the inner wall of the slide groove in the fixed cylinder 3, so as to quickly disassemble the clamp 201 and the clamp 202, and facilitate the replacement of clamps of different shapes to fix and clamp different types of lens shapes. The drive mechanism includes a second gear 304 and a rotary motor 305. One side of the second gear 304 is rotatably connected to the inner wall of the fixed cylinder 3, and the side of the second gear 304 away from the inner wall of the fixed cylinder 3 is fixedly connected to the output end of the rotary motor 305. The end of the rotary motor 305 away from the second gear 304 is fixedly connected to the inner wall of the fixed cylinder 3. The rotary motor 305 is a Portescap 22ECS brushless motor. The sliding assembly includes a drive motor 103, a drive wheel 104, a driven wheel 105, a track 106, a double-acting screw 107, a slide bar 109, two sliding blocks 108, and two grinders 111. The workbench 1 has a first fixed plate 101 and a second fixed plate 102 inside, which are perpendicularly arranged. One end of the drive motor 103 is fixedly connected to one side of the first fixed plate 101, and the output end of the drive motor 103 is fixedly connected to one side of the drive wheel 104. One side of the driven wheel 105 is fixedly connected to one end of the double-acting screw 107. The inner side of the track 106 is rotatably connected to the surfaces of the drive wheel 104 and the driven wheel 105. The end of the double-acting screw 107 away from the driven wheel 105 is rotatably connected to... The inner wall of the worktable 1 has through holes on the surface of two sliding blocks 108 that are threaded to the surface of a double-acting screw 107. The surfaces of the two sliding blocks 108 are slidably connected to the inner wall of a through groove on the top of the worktable 1. The two ends of the slide rod 109 are fixedly connected to the fixed plate 101 and the inner wall of the worktable 1, respectively. The inner walls of the through holes on the surface of the two sliding blocks 108 are slidably connected to the surface of the slide rod 109. The drive motor 103 drives the drive wheel 104, the driven wheel 105 and the track 106 to rotate. The driven wheel 105 drives the double-acting screw 107 to rotate, so that the two sliding blocks 108 move relative to each other on the slide rod 109 and the double-acting screw 107, so that the two grinders 111 grind the clamped lens. A drain pipe 203 is provided on one side of the fixed box 2. One end of the drain pipe 203 is fixedly connected to the inside of a through hole opened on one side of the fixed box 2. The other end of the drain pipe 203 away from the fixed box 2 is fixedly connected to the inner wall of the through hole opened on the surface of the workbench 1. The workbench 1 is provided with a dust collection box 110 and a slide. The output end of the drain pipe 203 is located above the dust collection box 110. The surface of the dust collection box 110 is slidably connected to the inner wall of the slide of the workbench 1. One end of the drain pipe 203 is located at the lowest point of the bottom wall of the fixed box 2. The liquid and dust impurities after grinding by the grinder 111 flow through the bottom wall of the fixed box 2 to the drain pipe 203 and are discharged into the dust collection box 110 to prevent dust from splashing during grinding by the grinder 111 and avoid affecting mechanical parts and the health of workers. The water spray assembly includes a water pump 401, a water tank 402, a water pipe 403, and a connecting pipe 404. The bottom of the water pump 401 and the bottom of the water tank 402 are both fixedly connected to the top of the connecting plate 4. The two ends of the water pipe 403 are fixedly connected to the opposite sides of the water pump 401 and the water tank 402, respectively. The output end of the water pump 401 is fixedly connected to one end of the connecting pipe 404. The surface of the connecting pipe 404 is fixedly connected to the inner wall of the through hole opened on the surface of the connecting plate 4. The output end of the connecting pipe 404 corresponds to the clamping points of clamp 1 201 and clamp 2 202. When the water pump 401 is started, the water inside the water tank 402 is discharged through the water pipe 403 and the connecting pipe 404 to rinse the lens clamped by clamp 1 201 and clamp 2 202 and to reduce the dust generated by the grinder 111 during grinding. The water pump 401 is a DP-60 micro DC electric water pump. The lifting assembly includes a connecting box 5, a threaded rod 502, a lifting motor 503, a sliding plate 504, and a connecting rod 505. The bottom of the connecting box 5 is fixedly connected to the top of the workbench 1. Sliding grooves 501 are provided on both sides of the inner wall of the connecting box 5. One end of the threaded rod 502 is rotatably connected to the bottom wall of the connecting box 5, and the end of the threaded rod 502 away from the bottom wall of the connecting box 5 is fixedly connected to the output end of the lifting motor 503. One end of the lifting motor 503 is fixedly connected to the top of the connecting box 5. The two ends of the sliding plate 504 are slidably connected to the inner walls of the sliding grooves 501 on both sides of the connecting box 5. The threaded rod 502... 2. The inner wall of the through hole opened on the surface of the slide plate 504 is threaded. One side of the slide plate 504 is fixedly connected to one end of the connecting rod 505. The end of the connecting rod 505 away from the slide plate 504 is fixedly connected to one side of the connecting plate 4. The surface of the connecting rod 505 is slidably connected to the inside of the sliding groove opened on the surface of the connecting box 5. When the lifting motor 503 is started, the threaded rod 502 is rotated, which causes the slide plate 504 to slide on the inner wall of the sliding groove 501 of the connecting box 5. Simultaneously, the connecting rod 505 and the connecting plate 4 are driven to move up and down, which facilitates the disassembly and fixing of the lens.

[0018] The working principle provided by this utility model is as follows: The rotary motor 305 drives the gear 2 304 to rotate, causing the gear 1 301 to drive the four connecting columns 306 and the four arc-shaped plates 307 to slide on the inner wall of the sliding groove in the fixed cylinder 3. This allows for quick disassembly and reassembly of the clamps 1 201 and 2 202, facilitating the replacement of clamps of different shapes to fix and clamp different types of lenses. The lifting motor 503 is started to drive the threaded rod 502 to rotate, causing the slide plate 504 to slide on the inner wall of the sliding groove 501 in the connecting box 5. This simultaneously drives the connecting rod 505 and the connecting plate 4 to move up and down, fixing and clamping the lens. The drive motor 103 drives the drive wheel. 104. The driven wheel 105, track 106, and double-acting screw 107 rotate, causing the two sliding blocks 108 to move relative to each other on the slide bar 109 and the double-acting screw 107, so that the two grinders 111 grind the clamped lens. The water pump 401 is started to discharge the water in the water tank 402 through the water pipe 403 and the connecting pipe 404 to suppress the dust during grinding. The liquid and dust impurities flow through the bottom wall of the fixed box 2 to the drain pipe 203 and into the dust collection box 110, preventing dust from splashing during grinding by the grinders 111 and avoiding the impact on mechanical parts and the health of the workers.

[0019] The circuits and controls involved in this utility model are all existing technologies, and will not be described in detail here.

[0020] The above are merely embodiments of this utility model and do not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the description and drawings of this utility model, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A lens polishing chucking mechanism characterized by, The device includes a workbench (1), a fixed box (2), a connecting plate (4), a clamp one (201), a clamp two (202), a lifting assembly, and two fixed assemblies. The top of the workbench (1) is fixedly connected to the bottom of the fixed box (2). A sliding assembly is provided inside the workbench (1). The inner walls of the clamp one (201) and clamp two (202) are respectively movably connected to the surfaces of the two fixed assemblies. The two fixed assemblies are respectively fixedly connected to the bottom wall of the fixed box (2) and the bottom of the connecting plate (4). The bottom of the lifting assembly is fixedly connected to the top of the workbench (1). One end of the lifting assembly is fixedly connected to one side of the connecting plate (4). A water spray assembly is provided on the top of the connecting plate (4). The fixing assembly includes a fixing cylinder (3), a gear (301), a rotating column (303), a drive mechanism, four connecting columns (306), and four arc-shaped plates (307). The fixing cylinder (3) has four sliding grooves inside, and the surfaces of the four arc-shaped plates (307) are slidably connected to the inner walls of the four sliding grooves of the fixing cylinder (3). One side of the four arc-shaped plates (307) is fixedly connected to one end of the four connecting columns (306). The surface of the gear (301) has four arc-shaped grooves (302), and the four connecting columns... (306) The surface is slidably connected to the inside of the four arc grooves (302). One side of the gear (301) is rotatably connected to the inner wall of the fixed cylinder (3) via a rotating shaft. The side of the gear (301) away from the inside of the fixed cylinder (3) is fixedly connected to one end of the rotating column (303). The end of the rotating column (303) away from the gear (301) is rotatably connected to the inner wall of the fixed cylinder (3). One side of the drive mechanism is rotatably connected to the inner wall of the fixed cylinder (3). The surface of the drive mechanism is rotatably connected to the surface of the gear (301).

2. The clamping mechanism for lens polishing according to claim 1, characterized in that, The driving mechanism includes a second gear (304) and a rotary motor (305). One side of the second gear (304) is rotatably connected to the inner wall of the fixed cylinder (3). The side of the second gear (304) away from the inner wall of the fixed cylinder (3) is fixedly connected to the output end of the rotary motor (305). The end of the rotary motor (305) away from the second gear (304) is fixedly connected to the inner wall of the fixed cylinder (3).

3. The clamping mechanism for lens polishing according to claim 1, characterized in that, The sliding assembly includes a drive motor (103), a drive wheel (104), a driven wheel (105), a track (106), a double-acting lead screw (107), a slide bar (109), two sliding blocks (108), and two grinders (111). The workbench (1) is equipped with a first fixed plate (101) and a second fixed plate (102). The first fixed plate (101) and the second fixed plate (102) are arranged perpendicularly. One end of the drive motor (103) is fixedly connected to one side of the first fixed plate (101), and the output end of the drive motor (103) is fixedly connected to one side of the drive wheel (104). One side of the driven wheel (105) is connected to the double-acting lead screw (107). One end is fixedly connected, the inner side of the track (106) is rotatably connected to the surface of the drive wheel (104) and the driven wheel (105), the end of the double-acting screw (107) away from the driven wheel (105) is rotatably connected to the inner wall of the worktable (1), the inner wall of the through hole opened on the surface of the two sliding blocks (108) is threadedly connected to the surface of the double-acting screw (107), the surface of the two sliding blocks (108) is slidably connected to the inner wall of the through groove opened on the top of the worktable (1), the two ends of the slide rod (109) are fixedly connected to the first fixed plate (101) and the inner wall of the worktable (1) respectively, and the inner wall of the through hole opened on the surface of the two sliding blocks (108) is slidably connected to the surface of the slide rod (109).

4. The clamping mechanism for lens polishing according to claim 1, characterized in that, The fixed box (2) is provided with a drain pipe (203) on one side. One end of the drain pipe (203) is fixedly connected to the inside of the through hole opened on one side of the fixed box (2). The end of the drain pipe (203) away from the fixed box (2) is fixedly connected to the inner wall of the through hole opened on the surface of the workbench (1). The workbench (1) is provided with a dust collection box (110) and a slide. The output end of the drain pipe (203) is located above the dust collection box (110). The surface of the dust collection box (110) is slidably connected to the inner wall of the slide of the workbench (1).

5. The clamping mechanism for lens polishing according to claim 1, characterized in that, The water spray assembly includes a water pump (401), a water tank (402), a water pipe (403), and a connecting pipe (404). The bottom of the water pump (401) and the bottom of the water tank (402) are fixedly connected to the top of the connecting plate (4). The two ends of the water pipe (403) are fixedly connected to the opposite sides of the water pump (401) and the water tank (402), respectively. The output end of the water pump (401) is fixedly connected to one end of the connecting pipe (404). The surface of the connecting pipe (404) is fixedly connected to the inner wall of the through hole opened on the surface of the connecting plate (4).

6. The clamping mechanism for lens polishing according to claim 1, characterized in that, The lifting assembly includes a connecting box (5), a threaded rod (502), a lifting motor (503), a sliding plate (504), and a connecting rod (505). The bottom of the connecting box (5) is fixedly connected to the top of the workbench (1). Sliding grooves (501) are provided on both sides of the inner wall of the connecting box (5). One end of the threaded rod (502) is rotatably connected to the bottom wall of the connecting box (5). The end of the threaded rod (502) away from the bottom wall of the connecting box (5) is fixedly connected to the output end of the lifting motor (503). One end of the lifting motor (503) is... The top of the connecting box (5) is fixedly connected, and the two ends of the sliding plate (504) are slidably connected to the inner wall of the sliding groove (501) on both sides of the connecting box (5). The surface of the threaded rod (502) is threadedly connected to the inner wall of the through hole opened on the surface of the sliding plate (504). One side of the sliding plate (504) is fixedly connected to one end of the connecting rod (505). The end of the connecting rod (505) away from the sliding plate (504) is fixedly connected to one side of the connecting plate (4). The surface of the connecting rod (505) is slidably connected to the inside of the sliding groove opened on the surface of the connecting box (5).

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