Spring bed net clamping device

Abstract

The present invention provides a spring bed net clamping device, including a driving mechanism, which is rotatably connected to the clamping mechanism, and a roller mechanism and a sensing module are installed on the clamping mechanism, and the sensing module is used to control the operation of the driving mechanism and the clamping mechanism. The driving mechanism drives the clamping mechanism to stop working when it is pressed down to the top surface of the bed net, and then controls the motor in the clamping mechanism to run, driving the clamping plates on both sides to squeeze the bed net, and relies on the friction between the clamping plates and the bed net to clamp the bed net to a certain height, and then controls the roller mechanism to support the bottom of the bed net. The added roller mechanism ensures the safety of the bed net transportation process, and the bed net will not fall off with the roller support at the bottom, which solves the technical problem that the existing spring bed net is mainly loaded and unloaded by manual transportation, has low work efficiency, and the spring bed net is heavy. If the spring bed net is loaded and unloaded by mechanical clamping, the clamping force is too large when clamping the bed net, which is easy to deform, and the clamping force is too small, which is easy to cause the bed net to fall, affecting product quality.

Description

Technical Field

[0001] The invention relates to the technical field of spring mattress preparation, in particular to a spring bed net clamping device. Background Art

[0002] A spring bed net is a high-end mattress. Each spring is compressed, then wrapped with folded non-woven fabric and welded together. These are then linked, arranged, and glued together to form a bed net. A sponge layer is typically placed on top to ensure even distribution of force between each spring, enhancing comfort. A unique feature of this bed net is that each spring operates independently, supporting and expanding independently. This allows one person to turn over or move without disturbing the other, ensuring a restful and comfortable sleep.

[0003] The existing spring bed nets are mainly loaded and unloaded by manual handling, which has low work efficiency and the spring bed nets are heavy. If the spring bed nets are loaded and unloaded by mechanical clamping, the clamping force is too large and it is easy to deform when clamping the bed net, and the clamping force is too small and it is easy to cause the bed net to fall, affecting product quality. Summary of the Invention

[0004] The present invention provides a spring bed net clamping device to solve the above-mentioned problem that the existing spring bed net is mainly loaded and unloaded by manual handling, which has low work efficiency and the spring bed net is heavy. If the spring bed net is loaded and unloaded by mechanical clamping, the clamping force when clamping the bed net is too large and it is easy to deform, while the clamping force is too small and it is easy to cause the bed net to fall, affecting product quality.

[0005] In order to solve the above technical problems, the present invention discloses a spring bed net clamping device, including a driving mechanism, which is rotatably connected to the clamping mechanism, and a roller mechanism and a sensing module are installed on the clamping mechanism, and the sensing module is used to control the operation of the driving mechanism and the clamping mechanism.

[0006] Preferably, the driving mechanism includes a base, the base is rotatably connected to support block one, support block one is rotatably connected to support arm one through drive shaft one, support arm one is rotatably connected to support arm two through drive shaft two, support arm two is rotatably connected to support block two through a guide shaft, and support block two is rotatably connected to the clamping mechanism through the mounting block.

[0007] Preferably, a stabilizing mechanism 1 is provided between support block 1 and support arm 2, and the stabilizing mechanism 1 includes a guide rod 4, which is rotatably connected to support arm 2, and the end of guide rod 4 away from support arm 2 is rotatably connected to guide rod 5, and guide rod 5 is rotatably connected to guide rod 6, and guide rod 6 is rotatably connected to support block 1.

[0008] Preferably, drive shaft one and drive shaft two are both fixedly connected to motor one, motor two is provided inside support block two, drive shaft three fixedly connected to motor two is fixedly connected to mounting block, and mounting block is rotatably connected to support block two.

[0009] Preferably, a stabilizing mechanism 2 is provided between the support arm 2 and the support block 2, and the stabilizing mechanism 2 includes a guide rod 1, which is rotatably connected to the support arm 2, the end of the guide rod 1 away from the support arm 2 is rotatably connected to the guide rod 2, the guide rod 2 is rotatably connected to the guide rod 3, and the guide rod 3 is rotatably connected to the support block 2.

[0010] Preferably, the clamping mechanism includes a frame, a mounting plate 1 is fixedly connected to the middle of the frame, a mounting block is fixedly connected to the mounting plate 1, and the sensing module includes a plurality of photoelectric sensors, which are connected to the motor 2 through a controller.

[0011] Preferably, the clamping mechanism also includes a double-headed motor, which is fixedly arranged on the mounting plate one, and the front and rear ends of the double-headed motor are respectively connected with a screw rod, the threaded section of the screw rod is threadedly connected to the mating sleeve, the mating sleeve is fixedly connected to the mating plate, the cylindrical section of the screw rod is rotatably connected to the support plate, the support plate is fixedly connected to the frame, the mating plate is fixedly connected to the connecting frame, and L-shaped plates are symmetrically provided at the left and right ends of the connecting frame, the horizontal end of the L-shaped plate is slidably connected to the slide rail, and the slide rail is symmetrically arranged on the left and right sides of the front and rear ends of the frame, the vertical end of the L-shaped plate is fixedly connected to the mounting plate two, and the mounting plates two on the left and right sides are fixedly connected to the splint, and a number of photoelectric sensors are installed on the splint on one side, and the several photoelectric sensors are connected to the double-headed motor through a controller.

[0012] Preferably, the roller mechanism includes two rollers, which are symmetrically arranged on the front and rear sides of the frame, and the left and right ends of the rollers are respectively fixedly connected to a rotating block, the middle part of the rotating block is rotatably connected to the mounting plate 2 through the connecting shaft 1, the mounting plate 2 is fixedly connected to the vertical end of the L-shaped plate, and the end of the rotating block away from the roller is rotatably connected to the driving member, and the driving member is fixedly mounted on the vertical end of the L-shaped plate.

[0013] Preferably, the driving member is a synchronous working mechanism, which includes:

[0014] Rack, the rack is fixedly connected to the frame, and the rack is correspondingly arranged with the L-shaped plate, the rack is meshed with gear 1, gear 1 is rotatably connected to the vertical end of the L-shaped plate through connecting shaft 2, connecting shaft 2 is fixedly connected to bevel gear 1, and bevel gear 1 is meshed with bevel gear 2;

[0015] Mounting plate three, mounting plate three is fixedly connected to the vertical end of the L-shaped plate, a sliding hole is provided in the middle of mounting plate three for the mounting rod to pass through, and the mounting rod is fixedly connected to mounting block three, and mounting block three is slidably connected to the vertical end of the L-shaped plate;

[0016] Spring three, spring three is fixedly arranged between mounting block three and mounting plate three, and spring three is sleeved on the mounting rod;

[0017] Two rotating rods 1, the two rotating rods 1 are symmetrically arranged on the upper and lower sides of the mounting block 3, and the rotating rods 1 are rotatably connected to the sliding block, and the sliding block is slidably connected to the mounting plate 3;

[0018] A push rod, one end of the push rod is fixedly connected to the mounting block three, and an end of the push rod away from the mounting block three is rotatably connected to an end of the rotating block away from the roller;

[0019] The meshing block is slidably set on the vertical end of the L-shaped plate, and the meshing block is set on the side of the mounting plate three away from the mounting block three. The threaded groove in the meshing block is threadedly connected to the threaded block, the threaded block is fixedly connected to the connecting shaft three, and the connecting shaft three is fixedly connected to the bevel gear two.

[0020] Preferably, a stable driving mechanism is provided inside the base, and the stable driving mechanism includes:

[0021] A fixed cavity is provided inside the base, the fixed cavity is communicated with the second through-hole, the second through-hole is provided at the upper end of the base, and a stabilizing shell is fixedly provided in the fixed cavity, a stabilizing cavity is provided inside the stabilizing shell, the stabilizing cavity is communicated with the fixed cavity through the first through-hole, buffer grooves are symmetrically provided at the left and right ends of the first through-hole, and the stabilizing cavity is communicated with the buffer groove through the third through-hole;

[0022] A rotating shaft, the rotating shaft is fixedly connected to the support block 1, and the rotating shaft is rotatably connected to the through hole 1 and the through hole 2 in the base. The side end of the rotating shaft is evenly distributed with a plurality of slots in the circumference, and the slots are correspondingly arranged with the buffer slots;

[0023] Two matching blocks, the two matching blocks are respectively slidably arranged in the buffer groove, and a spring 1 is fixedly connected between the matching block and the buffer groove, and one end of the matching block away from the spring 1 is fixedly connected to the clamping block, and the clamping block is matched with the clamping groove;

[0024] Sliding plate 1 is slidably arranged in the stabilizing cavity, and connecting seats are symmetrically provided on the left and right sides of the upper end of the sliding plate 1. The connecting seats are rotatably connected with the matching wheels, and the connecting seats and the matching wheels pass through the through hole 3 and enter the buffer groove, and the matching wheels are matched with the matching grooves in the matching blocks;

[0025] A plurality of springs 2, wherein the plurality of springs 2 are fixedly arranged between the upper end of the sliding plate 1 and the upper end of the stabilizing chamber;

[0026] A second rotating rod is rotatably connected to the stabilizing chamber and fixedly connected to the cam, and the cam contacts the lower end of the sliding plate;

[0027] Gear 2, Gear 2 is disposed in the fixed cavity and fixedly connected to the rotating shaft, Gear 2 is meshed with Gear 3, Gear 3 is rotatably connected to the upper end of the fixed cavity through the fixed shaft, and the end of the fixed shaft away from the upper end of the fixed cavity is fixedly connected to bevel gear 3;

[0028] The drive motor is fixedly mounted on the side end of the connecting block 1, and the drive motor is fixedly connected to the motor shaft. The motor shaft passes through the sliding hole provided at the side end of the base and enters the fixed cavity. The motor shaft is fixedly connected to the pulley 1 and the bevel gear 4, and the bevel gear 4 is meshed with the bevel gear 3.

[0029] Pulley 2 is fixedly connected to rotating rod 2 that passes through the side end of the stable cavity. One end of pulley 2 away from rotating rod 2 is fixedly connected to a rotating sleeve. The rotating sleeve is rotatably connected to the side end of the fixed cavity. Limiting grooves 1 are symmetrically provided on the upper and lower sides of the internal cavity of the rotating sleeve.

[0030] An electric telescopic rod, wherein the fixed end of the electric telescopic rod is fixedly connected to the side end of the base, the telescopic end of the electric telescopic rod is fixedly connected to the vertical end of the L-shaped block, the vertical end of the L-shaped block is fixedly connected to the second connecting block, the second connecting block is slidably connected to the first connecting block, and the first connecting block is slidably connected to the side end of the base;

[0031] Conveyor belt, the conveyor belt is used to connect pulley 1 and pulley 2, and tensioning pulleys are symmetrically provided on the front and rear sides of the conveyor belt. The tensioning pulley is fixedly connected to the mounting seat, the mounting seat is fixedly connected to the sliding plate 2, the sliding plate 2 is slidably connected to the side end of the stabilizing shell, and a control block 2 is slidably connected between the sliding plates 2 on the front and rear sides. The control block 2 is fixedly connected to the control block 1, and the side end of the control block 1 passes through the base and is fixedly connected to the vertical end of the L-shaped block;

[0032] A through hole is provided through the side end of the base, and two limit grooves are symmetrically provided at the upper and lower ends of the through hole. The through hole is correspondingly connected to the internal cavity of the rotating sleeve, and the through hole and the internal cavity of the rotating sleeve are slidingly connected to the horizontal end of the L-shaped block. Grooves are symmetrically provided at the upper and lower ends of the horizontal end of the L-shaped block. A spring four is fixed inside the groove. The spring four is fixedly connected to the limit block, and the limit block cooperates with the limit groove one or the limit groove two.

[0033] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0035] Figure 1 It is a structural schematic diagram of the present invention;

[0036] Figure 2It is a schematic structural diagram of the clamping mechanism of the present invention;

[0037] Figure 3 It is a side view structural diagram of the clamping mechanism of the present invention;

[0038] Figure 4 It is a structural diagram of the synchronous working mechanism of the present invention;

[0039] Figure 5 Schematic diagram of the structure of the stable driving mechanism of the present invention;

[0040] Figure 6 It is a schematic diagram of the top view of the connection structure of the sliding plate 2 of the present invention.

[0041] In the figure: 1. Support block 1; 11. Support arm 1; 12. Support arm 2; 13. Support block 2; 14. Mounting block; 2. Clamping mechanism; 21. Frame; 22. Mounting plate 1; 23. Double-headed motor; 24. Screw; 25. Matching sleeve; 26. Matching plate; 27. L-shaped plate; 28. Clamping plate; 29. ​​Driving member; 210. Rotating block; 211. Roller; 212. Support plate; 213. Slide rail; 214. Connecting shaft 1; 3. Guide rod 4; 31. Guide rod 5; 32 , guide rod 6; 4, drive shaft 1; 41, drive shaft 2; 42, motor 2; 43, guide shaft; 44, guide rod 1; 45, guide rod 2; 46, guide rod 3; 5, rack; 51, gear 1; 52, connecting shaft 3; 53, bevel gear 1; 54, bevel gear 2; 55, meshing block; 56, thread block; 57, thread groove; 58, mounting rod; 59, mounting plate 3; 510, mounting block 3; 511, rotating rod 1; 512, sliding block; 513, spring 3; 5 14. Push rod; 6. Base; 61. Fixed cavity; 62. Rotating shaft; 63. Gear 2; 64. Clamping slot; 65. Stabilizing shell; 66. Buffer slot; 67. Spring 1; 68. Stabilizing cavity; 69. Sliding plate 1; 610. Spring 2; 611. Connecting seat; 612. Matching wheel; 613. Through hole 3; 614. Tensioning wheel; 615. Rotating rod 2; 616. Cam; 617. Matching block; 618. Clamping block; 619. Through hole 1; 620. Fixed shaft; 621. Gear three; 622, bevel gear three; 623, bevel gear four; 624, pulley one; 625, drive motor; 626, connecting block one; 627, connecting block two; 628, conveyor belt; 629, L-shaped block; 630, electric telescopic rod; 631, through hole; 632, limit slot two; 633, spring four; 634, limit block; 635, rotating sleeve; 636, pulley two; 637, sliding plate two; 638, control block two; 639, mounting seat; 640, control block one. DETAILED DESCRIPTION

[0042] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0043] In addition, in the present invention, descriptions such as "first" and "second" are only used for descriptive purposes, and do not specifically refer to the order or sequence, nor are they used to limit the present invention. They are only used to distinguish components or operations described with the same technical terms, and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions and technical features between the various embodiments can be combined with each other, but this must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0044] Example 1

[0045] The embodiment of the present invention provides a spring bed net clamping device, such as Figure 1 As shown, it includes a driving mechanism, which is rotatably connected to the clamping mechanism 2. A roller mechanism and a sensing module are installed on the clamping mechanism 2. The sensing module is used to control the operation of the driving mechanism and the clamping mechanism 2.

[0046] The working principle and beneficial effects of the above technical solution are:

[0047] By setting up an induction module, the motor in the clamping mechanism 2 and the motor connected to the clamping mechanism 2 in the driving mechanism are controlled to run simultaneously, and the positions of the two side clamps in the clamping mechanism 2 are adjusted so that the clamps are in parallel positions on both sides of the bed net. The driving mechanism drives the clamping mechanism 2 to press down to the top surface of the bed net and stops working. Then, the motor in the clamping mechanism 2 is controlled to run, driving the two side clamps to squeeze the bed net, and relying on the friction between the clamps and the bed net, the bed net is clamped to a certain height. Then, the roller mechanism is controlled to support the bottom of the bed net, and the bed net is lifted and transported to the working station through the driving mechanism. This improves the deformation of the bed net caused by the strong clamping and transportation of the original mechanical clamp. The added roller mechanism ensures the safety of the bed net transportation process. The bed net will not fall off with the roller support. This solves the problem that the existing spring bed net is mainly loaded and unloaded manually, with low work efficiency and the spring bed net is heavy. If the spring bed net is loaded and unloaded by mechanical clamping, the clamping force is too large and it is easy to deform when clamping the bed net, and the clamping force is too small and it is easy to cause the bed net to fall, affecting the product quality.

[0048] Example 2

[0049] On the basis of Example 1, Figure 1As shown, the driving mechanism includes a base 6, which is rotatably connected to a support block 1, which is rotatably connected to a support arm 11 via a drive shaft 4, which is rotatably connected to a support arm 12 via a drive shaft 41, which is rotatably connected to a support arm 12 via a guide shaft 43, which is rotatably connected to a support block 13 via a guide shaft 43, and which is rotatably connected to a clamping mechanism 2 via a mounting block 14.

[0050] A stabilizing mechanism 1 is provided between the support block 1 and the support arm 2 12. The stabilizing mechanism 1 includes a guide rod 4 3, which is rotatably connected to the support arm 2 12. The end of the guide rod 4 3 away from the support arm 2 12 is rotatably connected to the guide rod 5 31, the guide rod 5 31 is rotatably connected to the guide rod 6 32, and the guide rod 6 32 is rotatably connected to the support block 1;

[0051] Drive shaft 1 4 and drive shaft 2 41 are both fixedly connected to motor 1, and motor 2 42 is provided inside support block 2 13. Drive shaft 3 fixedly connected to motor 2 42 is fixedly connected to mounting block 14, and mounting block 14 is rotatably connected to support block 2 13;

[0052] A stabilizing mechanism 2 is provided between the support arm 2 12 and the support block 2 13. The stabilizing mechanism 2 includes a guide rod 1 44. The guide rod 1 44 is rotatably connected to the support arm 2 12. The end of the guide rod 1 44 away from the support arm 2 12 is rotatably connected to the guide rod 2 45. The guide rod 2 45 is rotatably connected to the guide rod 3 46. The guide rod 3 46 is rotatably connected to the support block 2 13.

[0053] The working principle and beneficial effects of the above technical solution are:

[0054] When the driving mechanism is working, the driving member in the base 6 controls the rotation of the support block 1, the support block 1 is rotatably connected to the driving shaft 1 4, the driving shaft 1 4 is fixedly connected to the support arm 1 11, and when the motor 1 connected to the driving shaft 1 4 is working, it can drive the support arm 1 11 to rotate, the support arm 1 11 is rotatably connected to the driving shaft 2 41, the driving shaft 2 41 is fixedly connected to the support arm 2 12, and when the motor 1 connected to the driving shaft 2 41 is working, it can drive the support arm 2 12 to rotate. By setting the guide shaft 43, the support block 2 13 is always kept vertically downward, so that the clamping mechanism 2 is vertically downward. By setting the stabilizing mechanism 1, It is used to improve the connection stability between the support block 1 and the support arm 2 12, so that the support arm 2 12 remains stable when rotating. By setting a stabilizing mechanism 2, it is used to improve the connection stability between the support arm 2 12 and the support block 2 13, so that the support block 2 13 remains stable when rotating, thereby improving the overall stability of the driving mechanism during operation. When the motor 2 42 is working, it can drive the drive shaft 3 to rotate, thereby driving the mounting block 14 to rotate, so that the clamping mechanism 2 rotates. By respectively controlling the rotation of the support block 1, the rotation of the support arm 2 11, and the rotation of the support arm 2 13, the working range of the driving mechanism is improved.

[0055] Example 3

[0056] On the basis of Example 2, Figure 1-3 As shown, the clamping mechanism 2 includes a frame 21, a mounting plate 22 is fixedly connected to the middle of the frame 21, a mounting block 14 is fixedly connected to the mounting plate 22, and the sensing module includes a plurality of photoelectric sensors, which are connected to the motor 2 42 through a controller;

[0057] The clamping mechanism also includes a double-headed motor 23, which is fixedly arranged on the mounting plate 1 22, and the front and rear ends of the double-headed motor 23 are respectively connected with a screw rod 24, the threaded section of the screw rod 24 is threadedly connected to the matching sleeve 25, the matching sleeve 25 is fixedly connected to the matching plate 26, the cylindrical section of the screw rod 24 is rotatably connected to the support plate 212, the support plate 212 is fixedly connected to the frame 21, the matching plate 26 is fixedly connected to the connecting frame, and the left and right ends of the connecting frame are symmetrically provided with L-shaped plates 27, the horizontal ends of the L-shaped plates 27 are slidably connected to the slide rails 213, and the slide rails 213 are symmetrically arranged on the left and right sides of the front and rear ends of the frame 21, the vertical ends of the L-shaped plates 27 are fixedly connected to the mounting plate 2, and the mounting plates 2 on the left and right sides are fixedly connected to the splints 28, and a number of photoelectric sensors are installed on the splints 28 on one side, and the photoelectric sensors are connected to the double-headed motor 23 through the controller.

[0058] The roller mechanism includes two rollers 211, which are symmetrically arranged on the front and rear sides of the frame 21. The left and right ends of the rollers 211 are respectively fixedly connected to a rotating block 210. The middle portion of the rotating block 210 is rotatably connected to the mounting plate 2 via a connecting shaft 1 214. The end of the rotating block 210 away from the rollers 211 is rotatably connected to the driving member 29, which is fixedly mounted on the vertical end of the L-shaped plate 27.

[0059] The driving member 29 is a driving cylinder.

[0060] The working principle and beneficial effects of the above technical solution are:

[0061] The photoelectric sensor is installed on the splint 28. First, it detects whether the distance between the front and rear splints 28 reaches the preset distance. If not, it means that the distance between the rear splints 28 is smaller than the distance between the two ends of the bed net to be clamped. The controller controls the double-headed motor 23 to work, so that the front and rear splints 28 reach the preset distance, ensuring that the driving mechanism drives the clamping mechanism 2 to move downward so that the frame 21 can be pressed down to the top surface of the bed net. After the clamping mechanism 2 moves downward to the target position, the photoelectric sensor detects the distance between the splint 28 and the bed net to be clamped. The detection values ​​of several photoelectric sensors are consistent, indicating that the splint 28 is in a parallel position on both sides of the bed net. The detection values ​​of several photoelectric sensors are different, and the motor 2 42 drives the rotation of the clamping mechanism 2 to ensure The splints 28 are in parallel positions on both sides of the bed net. After the position of the splints 28 is adjusted, the double-headed motor 23 is started to drive the screw rod 24 to rotate, and the screw rod 24 drives the matching sleeve 25 to move toward each other, and the matching sleeve 25 drives the matching plate 26 to move, and the matching plate 26 drives the L-shaped plate 27 to move through the connecting frame. The slide rail 213 guides the movement of the L-shaped plate 27, and the L-shaped plate 27 drives the splint 28 and the connecting shaft 1 214 to move through the mounting plate 2. After the splint 28 squeezes and fixes the bed net, the driving mechanism drives the clamping mechanism 2 to rise to a certain height, and then controls the driving member 29 to work, driving the rotating block 210 to rotate, and the rotating block 210 drives the roller 211 to move to the lower end of the bed net, which supports the lower end of the bed net and ensures the safety of the bed net transportation process.

[0062] Example 4

[0063] On the basis of Example 3, Figure 4 As shown, the driving member 29 is a synchronous working mechanism, which includes:

[0064] Rack 5, rack 5 is fixedly connected to frame 21, and rack 5 is correspondingly provided with L-shaped plate 27, rack 5 is meshed with gear 1 51, gear 1 51 is rotatably connected to the vertical end of L-shaped plate 27 through connecting shaft 2, connecting shaft 2 is fixedly connected to bevel gear 1 53, bevel gear 1 53 is meshed with bevel gear 2 54;

[0065] A third mounting plate 59 is fixedly connected to the vertical end of the L-shaped plate 27. A sliding hole is provided in the middle of the third mounting plate 59 for the mounting rod 58 to pass through. The mounting rod 58 is fixedly connected to the third mounting block 510. The third mounting block 510 is slidably connected to the vertical end of the L-shaped plate 27.

[0066] Spring three 513, spring three 513 is fixedly disposed between mounting block three 510 and mounting plate three 59, and spring three 513 is sleeved on mounting rod 58;

[0067] Two rotating rods 511 are symmetrically arranged on the upper and lower sides of the mounting block 510, and the rotating rods 511 are rotatably connected to the sliding block 512, and the sliding block 512 is slidably connected to the mounting plate 59;

[0068] A push rod 514, one end of which is fixedly connected to the third mounting block 510, and an end of which is away from the third mounting block 510 and is rotatably connected to an end of the rotating block 210 away from the roller 211;

[0069] The engaging block 55 is slidably set on the vertical end of the L-shaped plate 27, and the engaging block 55 is set on the side of the mounting plate three 59 away from the mounting block three 510. The threaded groove 57 in the engaging block 55 is threadedly connected to the threaded block 56, and the threaded block 56 is fixedly connected to the connecting shaft three 52, and the connecting shaft three 52 is fixedly connected to the bevel gear two 54.

[0070] The working principle and beneficial effects of the above technical solution are:

[0071] When the splint 28 clamps and fixes the spring bed net, the splint 28 moves with the L-shaped plate 27 fixed to the mounting plate 2. When the L-shaped plate 27 moves, it drives the synchronous working mechanism to move. The gear 1 51 in the synchronous working mechanism meshes with the rack 5. When the gear 1 51 moves with the L-shaped plate 27, it rotates. The gear 1 51 drives the bevel gear 1 53 to rotate through the connecting shaft 2. The bevel gear 1 53 drives the bevel gear 2 54 to rotate. The bevel gear 2 54 drives the connecting shaft 3 52 to rotate. The connecting shaft 3 52 drives the threaded block 56 to rotate. The rotation of the threaded block 56 drives the meshing block 55 to slide along the vertical end of the L-shaped plate 27. The meshing block 55 drives the mounting rod 58 to move. The mounting plate 3 59 guides the movement of the mounting rod 58. The mounting rod 58 drives the mounting block 3 510 to slide along the vertical end of the L-shaped plate 27. When the mounting block 3 510 moves, it drives the rotating rod 1 511 to rotate. The first 511 drives the sliding block 512 to slide along the mounting plate 3 59, which is beneficial to improving the movement stability of the mounting block 3 510. The spring 3 513 is always in a compressed state. The mounting block 3 510 drives the pushing rod 514 to move, and the pushing rod 514 drives the rotating block 210 to rotate. The rotating block 210 drives the roller 211 to move to the lower side of the spring bed net to support the lower side of the spring bed net. By setting a synchronous working mechanism to replace the driving cylinder, costs are saved. When the splint 28 and the roller 211 clamp and fix the spring bed net, the spring bed net is first clamped and fixed by the splint 28 and then driven to move upward. At this time, the roller 211 has not moved to the lower side of the spring bed net, and then the splint 28 moves again to further clamp and fix the spring bed net. At the same time, the synchronous working mechanism drives the roller 211 to move to the lower side of the spring bed net to support the lower side of the spring bed net.

[0072] Example 5

[0073] On the basis of Example 2, Figure 5-6 As shown, a stable driving mechanism is provided inside the base 6, and the stable driving mechanism includes:

[0074] A fixed cavity 61 is provided inside the base 6 and communicates with the second through-hole. The second through-hole is provided through the upper end of the base 6. A stabilizing shell 65 is fixedly provided in the fixed cavity 61. A stabilizing cavity 68 is provided inside the stabilizing shell 65. The stabilizing cavity 68 communicates with the fixed cavity 61 through the first through-hole 619. Buffer grooves 66 are symmetrically provided at the left and right ends of the first through-hole 619. The stabilizing cavity 68 communicates with the buffer groove 66 through the third through-hole 613.

[0075] Rotating shaft 62, rotating shaft 62 is fixedly connected to support block 1, and rotating shaft 62 is rotatably connected to through hole 1 619 and through hole 2 in base 6. The side end of rotating shaft 62 is evenly distributed with a plurality of slots 64 around the circumference, and the slots 64 are correspondingly arranged with buffer slots 66;

[0076] Two matching blocks 617 are respectively slidably disposed in the buffer groove 66, and a spring 1 67 is fixedly connected between the matching blocks 617 and the buffer groove 66. One end of the matching block 617 away from the spring 1 67 is fixedly connected to a clamping block 618, and the clamping block 618 is engaged with the clamping groove 64;

[0077] Sliding plate 1 69 is slidably disposed in stabilizing cavity 68 , and connecting seats 611 are symmetrically provided on the left and right sides of the upper end of sliding plate 1 69 . Connecting seats 611 are rotatably connected to mating wheels 612 . Connecting seats 611 and mating wheels 612 pass through through hole 3 613 and enter buffer groove 66 , and mating wheels 612 engage with mating grooves in mating blocks 617 ;

[0078] A plurality of springs 610 are fixedly disposed between the upper end of the sliding plate 69 and the upper end of the stabilizing chamber 68;

[0079] The second rotating rod 615 is rotatably connected to the stabilizing chamber 68 and fixedly connected to the cam 616. The cam 616 contacts the lower end of the sliding plate 69.

[0080] Gear 2 63 is disposed in the fixed cavity 61 and fixedly connected to the rotating shaft 62. Gear 2 63 meshes with gear 3 621. Gear 3 621 is rotatably connected to the upper end of the fixed cavity 61 via a fixed shaft 620. An end of the fixed shaft 620 away from the upper end of the fixed cavity 61 is fixedly connected to bevel gear 3 622.

[0081] Drive motor 625, drive motor 625 is fixedly mounted on the side end of connecting block 1 626, and drive motor 625 is fixedly connected to the motor shaft, the motor shaft passes through the sliding hole provided through the side end of base 6 and enters the fixed cavity 61, and the motor shaft is fixedly connected to pulley 1 624 and bevel gear 4 623, and bevel gear 4 623 is meshed with bevel gear 3 622;

[0082] The second pulley 636 is fixedly connected to the second rotating rod 615 that passes through the side end of the stabilizing cavity 68. The end of the second pulley 636 away from the second rotating rod 615 is fixedly connected to the rotating sleeve 635. The rotating sleeve 635 is rotatably connected to the side end of the fixed cavity 61. The internal cavity of the rotating sleeve 635 is symmetrically provided with a first limiting groove on the upper and lower sides.

[0083] An electric telescopic rod 630, wherein the fixed end of the electric telescopic rod 630 is fixedly connected to the side end of the base 6, the telescopic end of the electric telescopic rod 630 is fixedly connected to the vertical end of the L-shaped block 629, the vertical end of the L-shaped block 629 is fixedly connected to the second connecting block 627, the second connecting block 627 is slidably connected to the first connecting block 626, and the first connecting block 626 is slidably connected to the side end of the base 6;

[0084] Conveyor belt 628, conveyor belt 628 is used to connect pulley 1 624 and pulley 2 636, and tensioning pulleys 614 are symmetrically provided on the front and rear sides of conveyor belt 628. Tensioning pulley 614 is fixedly connected to mounting seat 639, mounting seat 639 is fixedly connected to sliding plate 2 637, sliding plate 2 637 is slidably connected to the side end of stabilizing shell 65, and control block 2 638 is slidably connected between sliding plate 2 637 on the front and rear sides. Control block 2 638 is fixedly connected to control block 1 640, and control block 1 640 passes through the side end of base 6 and is fixedly connected to the vertical end of L-shaped block 629;

[0085] The through hole 631 is set through the side end of the base 6, and the upper and lower ends of the through hole 631 are symmetrically provided with a second limit groove 632. The through hole 631 is correspondingly connected to the internal cavity of the rotating sleeve 635, and the through hole 631 and the internal cavity of the rotating sleeve 635 are slidingly connected to the horizontal end of the L-shaped block 629. The upper and lower ends of the horizontal end of the L-shaped block 629 are symmetrically provided with grooves. A spring four 633 is fixed inside the groove. The spring four 633 is fixedly connected to the limit block 634. The limit block 634 cooperates with the limit groove one or the limit groove two 632.

[0086] The working principle and beneficial effects of the above technical solution are:

[0087] When controlling the rotation of support block 1, the drive motor 625 works, driving the motor shaft, the motor shaft drives pulley 1 624 and bevel gear 4 623 to rotate, bevel gear 4 623 drives bevel gear 3 622 to rotate, bevel gear 3 622 drives fixed shaft 620 to rotate, fixed shaft 620 drives gear 3 621 to rotate, gear 3 621 drives gear 2 63 to rotate, gear 2 63 drives rotating shaft 62 to rotate, rotating shaft 62 can drive support block 1 to rotate, at this time pulley 1 624 is idling, and cannot drive pulley 2 636 to rotate through conveyor belt 628, after support block 1 rotates to the target angle, the electric telescopic rod 630 extends, thereby driving L-shaped block 629 to move, and L-shaped block 629 drives control The control block 1 640 and the connecting block 2 627 move, and the connecting block 2 627 moves to drive the connecting block 1 626 to slide downward along the side end of the base 6, thereby driving the driving motor 625 to move downward, so that the bevel gear 4 623 and the bevel gear 3 622 are disengaged, so as to avoid the driving motor 625 from being started by mistake and causing the support block 1 to deflect. The control block 1 640 moves to drive the control block 2 638 to move, thereby driving the sliding plate 2 637 to slide along the side end of the stabilizing shell 65, driving the tensioning wheel 614 to move, so that the conveyor belt 628 is in a tensioned state, and the L-shaped block 629 drives the limit block 634 to disengage from the limit groove 1 and cooperate with the limit groove 2 632, so that the rotating sleeve 635 can rotate freely, and then the control The pulley 1 624 rotates, and the conveyor belt 628 drives the pulley 2 636 to rotate. The pulley 2 636 drives the rotating rod 2 615 to rotate. The rotating rod 2 615 drives the cam 616 to rotate. The protruding end of the cam 616 contacts the lower end of the sliding plate 1 69, pushing the sliding plate 1 639 to slide upward along the stabilizing cavity 68, driving the connecting seat 611 to move upward. The connecting seat 611 drives the matching wheel 612 to move upward. The matching wheel 612 cooperates with the matching groove, thereby pushing the matching block 617 to move toward each other. The matching block 617 drives the card block 618 to move, so that the card block 618 cooperates with the card groove 64, so that the rotating shaft 62 remains fixed, thereby improving the stability of the rotating shaft 62, thereby improving the stability of the support block 1. The rigidity is to prevent the support block 1 from deflecting and affecting the clamping effect of the spring bed net clamping device. If it is necessary to control the rotation of the rotating shaft 62 again, the protruding end of the control cam 616 is disengaged from the contact with the lower end of the sliding plate 1 69. Under the elastic action of the spring 1 67 and the spring 2 610, the block 618 and the sliding plate 1 69 are restored to their original positions. Then the electrical telescopic rod 630 is controlled to shorten, driving the bevel gear 4 623 to engage with the bevel gear 3 622, and the limit block 634 cooperates with the limit groove 1, so that the rotating sleeve 635 cannot rotate, and the tensioning wheel 614 moves, so that the conveyor belt 628 is in a relaxed state, so that the rotation of the pulley 1 624 cannot drive the pulley 2 636 to rotate, thereby ensuring the normal rotation of the rotating shaft 62.

[0088] Example 6

[0089] On the basis of Example 2, the following is also included:

[0090] Speed ​​sensor: The speed sensor is provided on the output shaft of the double-headed motor 23 and is used to detect the speed of the output shaft of the double-headed motor 23;

[0091] Alarm: The alarm is set on the outside of the support arm 2 13;

[0092] Alarm controller: The alarm controller is electrically connected to the force sensor and the alarm;

[0093] The alarm controller controls the alarm based on the detection value of the force sensor, including the following steps:

[0094] Step 1: The alarm controller calculates the theoretical squeezing force of the clamping plate 28 on the spring bed net according to the speed of the output shaft of the double-headed motor 23 detected by the speed sensor and formula (1);

[0095]

[0096] Wherein, F is the theoretical squeezing force of the clamping plate 28 on the spring bed net, P is the working power of the double-headed motor 23, N is the detection value of the speed sensor, R is the pitch diameter of the thread of the screw rod 24, tan is the tangent, α is the helix angle of the screw rod 24, and β is the friction angle between the screw rod 24 and the matching sleeve 25;

[0097] Step 2: The alarm controller calculates the clamping stability coefficient of the clamping mechanism 2 on the spring bed net based on the theoretical squeezing force of the clamping plate 28 on the spring bed net calculated in step 1 and formula (2). The alarm controller compares the clamping stability coefficient of the clamping mechanism 2 on the spring bed net with a preset stability coefficient. If the clamping stability coefficient is less than the preset stability coefficient, the alarm controller controls the alarm to sound an alarm.

[0098]

[0099] Where K is the clamping stability coefficient of the clamping mechanism 2 on the spring bed net, μ is the friction coefficient between the clamping plate 28 and the clamping spring bed net, M is the weight of the spring bed net, and g is the acceleration of gravity, which is 9.8m / s 2 ;

[0100] In formula (1), P is 200W and N is 1S. -1 ; R is 5cm, α is 30°, β is 10°, and F is calculated to be 6712.8N;

[0101] In formula (2), μ is taken as 0.2, M is taken as 50 kg, and K is calculated to be 2.68. The clamping stability coefficient of the clamping mechanism 2 on the spring bed net is the ratio of the connection force between the clamping plate 28 and the spring bed net and the weight of the spring bed net. If the connection force between the clamping plate 28 and the spring bed net is greater than the weight of the spring bed net, the spring bed net will not fall off and the alarm will not sound.

[0102] The working principle and beneficial effects of the above technical solution are:

[0103] A speed sensor is set on the output shaft of the double-headed motor 23 to detect the speed of the output shaft of the double-headed motor 23; the alarm controller calculates the theoretical squeezing force of the clamping plate 28 on the spring bed net according to the speed of the output shaft of the double-headed motor 23 detected by the speed sensor and formula (1), and then calculates the clamping stability coefficient of the clamping mechanism 2 on the spring bed net according to the theoretical squeezing force of the clamping plate 28 on the spring bed net calculated in step 1 and formula (2). The alarm controller compares the clamping stability coefficient of the clamping mechanism 2 on the spring bed net with the preset stability coefficient. If the clamping stability coefficient is less than the preset stability coefficient, the alarm controller controls the alarm to sound an alarm, reminding the user that the clamping plate 28 has not clamped the spring bed net and there is a risk of the spring bed net falling. The speed of the double-headed motor 23 is adjusted to control the clamping plate 28 to slowly clamp the spring bed net, thereby increasing the theoretical squeezing force of the clamping plate 28 on the spring bed net and preventing the spring bed net from falling.

[0104] Obviously, those skilled in the art may make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if such changes and modifications fall within the scope of the claims and their equivalents, the present invention is intended to include such changes and modifications.

Claims

1. A spring bed net clamping device, characterized in that: The driving mechanism is rotatably connected to the clamping mechanism (2), and the clamping mechanism (2) is provided with a roller mechanism and a sensing module, wherein the sensing module is used to control the operation of the driving mechanism and the clamping mechanism (2); The driving mechanism includes a base (6), the base (6) is rotatably connected to the support block 1 (1), the support block 1 (1) is rotatably connected to the support arm 1 (11) via the drive shaft 1 (4), the support arm 1 (11) is rotatably connected to the support arm 2 (12) via the drive shaft 2 (41), the support arm 2 (12) is rotatably connected to the support block 2 (13) via the guide shaft (43), and the support block 2 (13) is rotatably connected to the clamping mechanism (2) via the mounting block (14); The clamping mechanism (2) includes a frame (21), a mounting plate (22) is fixedly connected to the middle of the frame (21), a mounting block (14) is fixedly connected to the mounting plate (22), and the sensing module includes a plurality of photoelectric sensors, which are connected to the motor (42) via a controller. The clamping mechanism also includes a double-headed motor (23), which is fixedly arranged on the mounting plate (22). The front and rear ends of the double-headed motor (23) are respectively connected to a screw rod (24), the threaded section of the screw rod (24) is threadedly connected to the matching sleeve (25), the matching sleeve (25) is fixedly connected to the matching plate (26), the cylindrical section of the screw rod (24) is rotatably connected to the support plate (212), the support plate (212) is fixedly connected to the frame (21), and the matching plate (26) is fixed to the connecting frame. The connecting frame is connected, and L-shaped plates (27) are symmetrically provided at the left and right ends of the connecting frame. The horizontal end of the L-shaped plate (27) is slidably connected to the slide rail (213). The slide rail (213) is symmetrically arranged on the left and right sides of the front and rear ends of the frame (21). The vertical end of the L-shaped plate (27) is fixedly connected to the second mounting plate. The second mounting plates on the left and right sides are fixedly connected to the clamping plate (28). A plurality of photoelectric sensors are installed on the clamping plate (28) on one side. The plurality of photoelectric sensors are connected to the double-headed motor (23) through a controller. The roller mechanism includes two rollers (211), which are symmetrically arranged on the front and rear sides of the frame (21), and the left and right ends of the rollers (211) are respectively fixedly connected to a rotating block (210), the middle part of the rotating block (210) is rotatably connected to the second mounting plate through the first connecting shaft (214), the second mounting plate is fixedly connected to the vertical end of the L-shaped plate (27), and the end of the rotating block (210) away from the rollers (211) is rotatably connected to the driving member (29), and the driving member (29) is fixedly installed on the vertical end of the L-shaped plate (27); The driving member (29) is a synchronous working mechanism, which includes: The rack (5) is fixedly connected to the frame (21), and the rack (5) is correspondingly arranged with the L-shaped plate (27). The rack (5) is meshed with the gear 1 (51). The gear 1 (51) is rotatably connected to the vertical end of the L-shaped plate (27) through the connecting shaft 2. The connecting shaft 2 is fixedly connected to the bevel gear 1 (53). The bevel gear 1 (53) is meshed with the bevel gear 2 (54). Mounting plate three (59), mounting plate three (59) is fixedly connected to the vertical end of the L-shaped plate (27), a sliding hole for the mounting rod (58) to pass through is provided in the middle of mounting plate three (59), and the mounting rod (58) is fixedly connected to mounting block three (510), and mounting block three (510) is slidably connected to the vertical end of the L-shaped plate (27); Spring three (513), spring three (513) is fixedly arranged between mounting block three (510) and mounting plate three (59), and spring three (513) is sleeved on mounting rod (58); Two rotating rods (511), the two rotating rods (511) are symmetrically arranged on the upper and lower sides of the mounting block (510), and the rotating rod (511) is rotatably connected to the sliding block (512), and the sliding block (512) is slidably connected to the mounting plate (59); A push rod (514), one end of the push rod (514) is fixedly connected to the mounting block three (510), and one end of the push rod (514) away from the mounting block three (510) is rotatably connected to one end of the rotating block (210) away from the roller (211); The engaging block (55) is slidably arranged on the vertical end of the L-shaped plate (27), and the engaging block (55) is arranged on the side of the mounting plate three (59) away from the mounting block three (510), the thread groove (57) in the engaging block (55) is threadedly connected to the threaded block (56), the threaded block (56) is fixedly connected to the connecting shaft three (52), and the connecting shaft three (52) is fixedly connected to the bevel gear two (54).

2. A spring bed net clamping device according to claim 1, characterized in that: A stabilizing mechanism 1 is provided between the support block 1 (1) and the support arm 2 (12), and the stabilizing mechanism 1 includes a guide rod 4 (3), the guide rod 4 (3) is rotatably connected to the support arm 2 (12), the end of the guide rod 4 (3) away from the support arm 2 (12) is rotatably connected to the guide rod 5 (31), the guide rod 5 (31) is rotatably connected to the guide rod 6 (32), and the guide rod 6 (32) is rotatably connected to the support block 1 (1).

3. The spring bed net clamping device according to claim 1, characterized in that: The driving shaft 1 (4) and the driving shaft 2 (41) are both fixedly connected to the motor 1, the motor 2 (42) is provided inside the supporting block 2 (13), the driving shaft 3 fixedly connected to the motor 2 (42) is fixedly connected to the mounting block (14), and the mounting block (14) is rotatably connected to the supporting block 2 (13).

4. The spring bed net clamping device according to claim 1, characterized in that: A stabilizing mechanism 2 is provided between the supporting arm 2 (12) and the supporting block 2 (13), and the stabilizing mechanism 2 includes a guide rod 1 (44), the guide rod 1 (44) is rotatably connected to the supporting arm 2 (12), the end of the guide rod 1 (44) away from the supporting arm 2 (12) is rotatably connected to the guide rod 2 (45), the guide rod 2 (45) is rotatably connected to the guide rod 3 (46), and the guide rod 3 (46) is rotatably connected to the supporting block 2 (13).

5. The spring bed net clamping device according to claim 1, characterized in that: A stable driving mechanism is provided inside the base (6), and the stable driving mechanism comprises: A fixed cavity (61), the fixed cavity (61) is arranged inside the base (6), the fixed cavity (61) is communicated with the second through hole, the second through hole is arranged at the upper end of the base (6), and a stabilizing shell (65) is fixedly arranged in the fixed cavity (61), a stabilizing cavity (68) is arranged inside the stabilizing shell (65), the stabilizing cavity (68) is communicated with the fixed cavity (61) through the first through hole (619), and buffer grooves (66) are symmetrically provided at the left and right ends of the first through hole (619), and the stabilizing cavity (68) is communicated with the buffer groove (66) through the third through hole (613); A rotating shaft (62), the rotating shaft (62) is fixedly connected to the supporting block (1), and the rotating shaft (62) is rotatably connected to the through hole (619) and the through hole (619) in the base (6), and a plurality of slots (64) are evenly distributed around the side end of the rotating shaft (62), and the slots (64) are correspondingly arranged with the buffer slots (66); Two matching blocks (617), the two matching blocks (617) are respectively slidably arranged in the buffer groove (66), and a spring (67) is fixedly connected between the matching block (617) and the buffer groove (66), and one end of the matching block (617) away from the spring (67) is fixedly connected to the clamping block (618), and the clamping block (618) is matched with the clamping groove (64); Sliding plate one (69), sliding plate one (69) is slidably arranged in the stabilizing cavity (68), and connecting seats (611) are symmetrically provided on the left and right sides of the upper end of the sliding plate one (69), the connecting seat (611) is rotatably connected to the matching wheel (612), and the connecting seat (611) and the matching wheel (612) pass through the through hole three (613) and enter the buffer groove (66), and the matching wheel (612) is matched with the matching groove in the matching block (617); A plurality of springs (610) are fixedly arranged between the upper end of the sliding plate (69) and the upper end of the stabilizing chamber (68); The second rotating rod (615) is rotatably connected to the stabilizing chamber (68), and the second rotating rod (615) is fixedly connected to the cam (616), and the cam (616) contacts the lower end of the sliding plate (69); Gear 2 (63), Gear 2 (63) is disposed in the fixed cavity (61), and Gear 2 (63) is fixedly connected to the rotating shaft (62), Gear 2 (63) is meshed with Gear 3 (621), Gear 3 (621) is rotatably connected to the upper end of the fixed cavity (61) through the fixed shaft (620), and one end of the fixed shaft (620) away from the upper end of the fixed cavity (61) is fixedly connected to Bevel Gear 3 (622); A drive motor (625) is fixedly mounted on the side end of the connecting block (626), and the drive motor (625) is fixedly connected to the motor shaft, the motor shaft passes through a sliding hole provided at the side end of the base (6) and enters the fixed cavity (61), and the motor shaft is fixedly connected to the pulley (624) and the bevel gear (623), and the bevel gear (623) is meshed with the bevel gear (622). The second pulley (636) is fixedly connected to the second rotating rod (615) that passes through the side end of the stable cavity (68). The end of the second pulley (636) away from the second rotating rod (615) is fixedly connected to the rotating sleeve (635). The rotating sleeve (635) is rotatably connected to the side end of the fixed cavity (61). The internal cavity of the rotating sleeve (635) is symmetrically provided with a limiting groove (1) on the upper and lower sides. An electric telescopic rod (630), wherein the fixed end of the electric telescopic rod (630) is fixedly connected to the side end of the base (6), the telescopic end of the electric telescopic rod (630) is fixedly connected to the vertical end of the L-shaped block (629), the vertical end of the L-shaped block (629) is fixedly connected to the second connecting block (627), the second connecting block (627) is slidably connected to the first connecting block (626), and the first connecting block (626) is slidably connected to the side end of the base (6); A conveyor belt (628) is used to connect the first pulley (624) and the second pulley (636). Tensioning wheels (614) are symmetrically provided on the front and rear sides of the conveyor belt (628). The tensioning wheel (614) is fixedly connected to the mounting seat (639). The mounting seat (639) is fixedly connected to the second sliding plate (637). The second sliding plate (637) is slidably connected to the side end of the stabilizing shell (65). A control block (638) is slidably connected between the second sliding plates (637) on the front and rear sides. The control block (638) is fixedly connected to the first control block (640). The control block (640) passes through the side end of the base (6) and is fixedly connected to the vertical end of the L-shaped block (629). A through hole (631) is provided through the side end of the base (6), and the through hole (631) is symmetrically provided with a second limiting groove (632) at the upper and lower ends of the through hole (631), the through hole (631) is correspondingly connected to the internal cavity of the rotating sleeve (635), and the through hole (631) and the internal cavity of the rotating sleeve (635) are slidably connected to the horizontal end of the L-shaped block (629), the horizontal end of the L-shaped block (629) is symmetrically provided with grooves at the upper and lower ends, a spring four (633) is fixedly provided inside the groove, the spring four (633) is fixedly connected to the limiting block (634), and the limiting block (634) cooperates with the limiting groove one or the limiting groove two (632).

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