Stair tread for scaffolding

Abstract

The application discloses a stair tread of a scaffold, which is composed of a steel pipe, a bottom module plate, an upper module plate and a middle module plate, the module plates are arranged on the steel pipe and the included angle of the module plates with the ground is adjusted by rotating the steel pipe, in addition, the stair tread further comprises a connecting pipe fitting, a buffer assembly, a conveying assembly and the like, wherein the connecting pipe fitting is connected to the steel pipe and is responsible for adjusting the angle of the bottom module plate, the upper module plate and the middle module plate, the buffer assembly is arranged between the steel pipes and is used for relieving the impact of objects in the conveying process, and the conveying assembly realizes the horizontal movement of the objects through a sliding vehicle, thereby reducing the influence on the equipment. The design enables the work area to efficiently and stably convey the materials, and improves the work efficiency.

Description

Technical Field

[0001] This invention relates to the field of tooling and equipment technology for engineering construction, specifically a stair tread for scaffolding. Background Technology

[0002] Existing external scaffolding staircases mainly fall into two categories: prefabricated stair ramps and those erected using steel pipes and couplers. Prefabricated stair ramps are primarily used for ladder cages or access routes with fixed dimensions and minimal assembly / disassembly, offering good stability and safety. However, in practical applications, this type of staircase cannot adapt to external scaffolding of varying sizes and heights. Furthermore, prefabricated staircases are costly in terms of materials and labor, and their assembly and disassembly processes are relatively cumbersome. On the other hand, while staircases erected using steel pipes and couplers can meet the needs of external scaffolding of different sizes and heights, they also suffer from high labor and material consumption, cumbersome assembly and disassembly processes, and poor slip resistance.

[0003] Therefore, we propose a stair tread for scaffolding. Summary of the Invention

[0004] The purpose of this invention is to provide a stair tread for scaffolding to solve the problems mentioned in the background section. To achieve the above objective, this invention provides the following technical solution: a stair tread for scaffolding, comprising: Steel pipes, there are two steel pipes in total; The bottom module plate is disposed on one side of the steel pipe; Upper module plate, the upper module plate is disposed on the other side of the steel pipe; A middle module board, wherein there is at least one set of middle module boards, and the middle module boards are disposed between the bottom module board and the upper module board; An adjustment component is provided on the steel pipe, and the adjustment component is used to adjust the angle between the bottom module plate, the upper module plate and the middle module plate and the steel pipe; A buffer assembly, wherein the buffer assembly is disposed between the steel pipes; A conveying assembly, which works in conjunction with a buffer assembly to convey objects from high to low.

[0005] Preferably, the adjusting assembly includes a connecting pipe fitting, which is sleeved on the steel pipe. One side of the connecting pipe fitting is a sleeve portion. Rotating rollers are fixedly connected to both sides of the bottom module plate, the upper module plate, and the middle module plate. The rotating rollers are rotatably connected to the sleeve portion. A rectangular tube is fixedly connected to the bottom of the sleeve portion. The front and rear ends of the rectangular tube are open. A rack is slidably connected inside the rectangular tube. A gear is fixedly connected to the outer wall of the rotating roller. The rack meshes with the gear and abuts against each other.

[0006] Preferably, the front half of the rack has teeth, and the front end of the rack and the end of the teeth are fixedly connected to limit blocks. The rectangular tube is fixedly connected to the stops on both sides of the gear.

[0007] Preferably, the ends of the connecting pipes on the bottom module plate and the upper module plate are provided with screw assemblies. The screw assembly includes a screw, which is threadedly connected to a rack. A gear is fixedly connected to the top of the screw. The screw is rotatably connected to the end of the rectangular tube. A stacked gear is meshed on one side of the gear. The stacked gear is rotatably connected to the rectangular tube. A gear is sleeved on the steel pipe. The gear is meshed with the stacked gear.

[0008] Preferably, a semicircular plate is symmetrically arranged on one side of the gear four, the semicircular plate is fixedly connected to the gear four, and a fixing ear is fixedly connected to both ends of the semicircular plate. A bolt hole one is opened on the fixing ear, and a bolt hole two is opened on the connecting pipe on both sides of the bottom module plate and the upper module plate. A fixing bolt is internally threaded in the bolt hole two, and a rubber sheet is fixedly connected to the bottom of the fixing bolt.

[0009] Preferably, the buffer assembly further includes a blocking rod, a gear five is fixedly connected to the side of the blocking rod near the steel pipe, a rack two is meshed on one side of the gear five, a slide rail is fixedly connected to one side of the rectangular tube, the rack two is slidably connected to the slide rail, the gear five is rotatably connected to the slide rail, and a spring one is provided in the slide rail, one end of the spring one is fixedly connected to the rack two.

[0010] Preferably, a placement box is fixedly connected to the bottom of the slide, a counterweight is slidably connected inside the placement box, a spring plate is fixedly connected to the top of the counterweight, the spring plate is fixedly connected to one end of a spring, a pulley is rotatably connected to both sides of the counterweight, the pulley is slidably connected to the inner wall of the placement box, and several abutment strips are fixedly connected to the bottom of the counterweight.

[0011] Preferably, the conveying assembly further includes a sliding trolley, and the bottom module plate, the upper module plate and the middle module plate are provided with slide rails. The intersection points of the slide rails on the bottom module plate, the upper module plate and the middle module plate are matched. There are several sets of sliding trolleys, and the sliding trolleys are connected by connecting ropes.

[0012] Preferably, the sliding trolley includes a base, with a long rod 1 fixedly connected to both ends of the base, a pulley 2 rotatably connected to one end of the long rod 1, a long rod 2 rotatably connected to the end of the long rod 1 away from the pulley 2, and a pulley 3 rotatably connected to the end of the long rod 2.

[0013] Preferably, the base has holes on both sides, and a sliding groove is formed between the holes. A locking element is slidably connected in the sliding groove. There are two locking elements. A lever is fixedly connected to the outer wall of the locking element. The lever extends out of the base. A second spring is provided between the locking elements. Both ends of the second spring are fixedly connected to the locking elements. A basket is fixedly connected to the top of the base.

[0014] This invention offers at least the following advantages: The modular panels are all mounted on steel pipes, and their angle with the ground is adjusted by rotating the steel pipes. Furthermore, it includes connecting pipes, a buffer assembly, and a conveying assembly. The connecting pipes are attached to the steel pipes and are responsible for adjusting the angles of the bottom, upper, and middle modular panels. The buffer assembly is positioned between the steel pipes to mitigate impacts on the objects during transport. The conveying assembly uses a sliding trolley to achieve horizontal movement of the items, reducing the impact on the equipment. This design enables efficient and stable material transport in the work area, improving work efficiency. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the reverse side structure of the present invention; Figure 3 This is a schematic diagram of the adjustment component structure of the present invention; Figure 4 This is a cross-sectional view of the connecting pipe fitting of the present invention; Figure 5 This is a schematic diagram of the cross-sectional structure of the steel pipe of the present invention; Figure 6 This is a schematic diagram of the buffer component structure of the present invention; Figure 7 This is a cross-sectional view of the placement box of the present invention; Figure 8 This is a schematic diagram of the conveying component structure of the present invention; Figure 9 This is a cross-sectional view of the sliding carriage structure of the present invention; Figure 10 This is a cross-sectional view of the sliding vehicle structure of the present invention from another perspective.

[0016] In the diagram: 10-Steel pipe; 20-Bottom module plate; 30-Upper module plate; 40-Middle module plate; 50-Adjusting component; 60-Buffer component; 70-Conveying component; 51-Connecting pipe fitting; 52-Sleeve section; 53-Rotating roller; 54-Rectangular tube; 55-Rack one; 56-Gear one; 57-Limit block one; 58-Stop block; 80-Screw assembly; 81-Screw; 82-Gear two; 83-Gear 3; 84-Gear 4; 841-Semicircular plate; 842-Fixing ear; 843-Bolt hole 1; 844-Bolt hole 2; 845-Fixing bolt; 846-Rubber sheet; 61-Blocking rod; 62-Gear 5; 63-Rack 2; 64-Slide rail; 65-Spring 1; 641-Placement box; 642-Counterweight block; 643-Spring plate; 644-Pulley 1; 645-Abutting strip; 71-Sliding cart; 72-Slide rail; 73-Connecting rope; 711-Base; 712-Long rod 1; 713-Pulley 2; 714-Long rod 2; 715-Pulley 3; 721-Hole; 722-Slide groove; 723-Clip; 724-Spring 2; 725-Placement basket; 726-Pulley block. Detailed Implementation

[0017] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0018] Please see Figure 1-10 The present invention provides a technical solution: a stair tread for scaffolding, comprising: Steel pipe 10, there are two steel pipes 10 in total; The bottom module plate 20 is disposed on one side of the steel pipe 10; Upper module plate 30, the upper module plate 30 is disposed on the other side of steel pipe 10; The middle module board 40, at least one set of the middle module board 40, is disposed between the bottom module board 20 and the upper module board 30; An adjustment component 50 is disposed on the steel pipe 10 and is used to adjust the angles between the bottom module plate 20, the upper module plate 30 and the middle module plate 40 and the steel pipe 10. A buffer assembly 60 is disposed between the steel pipes 10; The conveying assembly 70, used in conjunction with the buffer assembly 60, conveys objects from high to low. In use, workers can select a suitable steel pipe 10 from the construction site and cut it accordingly. The bottom module plate 20 is inserted from one side, followed by a suitable number of middle module plates 40 sequentially placed onto the steel pipe 10. Finally, the top module plate 30 is placed at the top of the steel pipe 10. By rotating the steel pipe 10 in conjunction with the adjusting assembly 50, the angle between each plate and the steel pipe 10 can be adjusted, ensuring the plates are parallel to the ground, facilitating worker movement. After adjustment, the bottom... The module plate 20 and the upper module plate 30 are fixed to the steel pipe 10, thereby preventing the plates from sliding on the steel pipe 10. When it is necessary to transport objects from high to low, the bottom module plate 20, the upper module plate 30 and the middle module plate 40 can be rotated to be parallel to the steel pipe 10 by adjusting the component 50, so that the surfaces of the bottom module plate 20, the upper module plate 30 and the middle module plate 40 overlap, which facilitates the sliding of objects from top to bottom. During the sliding process of objects, the buffer component 60 can be used to decelerate the object, thereby preventing the sliding speed from being too fast and causing damage to the object or injury to the workers.

[0019] The adjusting assembly 50 includes a connecting pipe 51, which is sleeved on the steel pipe 10. One side of the connecting pipe 51 is a sleeve portion 52, which is fixedly connected to the connecting pipe 51. Rotating rollers 53 are fixedly connected to both sides of the bottom module plate 20, the upper module plate 30, and the middle module plate 40. The rotating rollers 53 are rotatably connected to the sleeve portion 52. A rectangular tube 54 is fixedly connected to the bottom of the sleeve portion 52. The rectangular tube 54 has open ends at both ends. A rack 55 is slidably connected inside the rectangular tube 54. A gear 56 is fixedly connected to the outer wall of the rotating roller 53. The rack 55 meshes with the gear 56, and the racks 55 abut against each other. By adjusting the bottom module plate... 20. The connecting pipes 51 on the upper module plate 30 and the middle module plate 40 are fitted onto the steel pipe 10, so that the adjacent rectangular pipes 52 are connected end to end. By pushing the rack 55 at one end, the rack 55 drives the gear 56 to rotate, which in turn drives the plate surface to rotate. When the appropriate angle is reached, the pushing is stopped, so that a suitable angle is formed between the plate surface and the steel pipe 10, which is convenient for workers to walk up and down. At the same time, when the rack 55 slides in the rectangular pipe 52, the adjacent racks 55 also slide, so that each plate surface rotates synchronously. Using this method, only the rotation of the rack 55 at one end needs to be adjusted to drive all the plate surfaces to rotate to the appropriate angle, which is relatively simple to operate.

[0020] The front half of the rack 55 has teeth, and the front end of the rack 55 and the end of the teeth are fixedly connected to the limit block 57. The rectangular tube 54 is fixedly connected to the stop block 58 on both sides of the gear 56. When the rack 55 moves in the rectangular tube 54, the limit block 57 in the front and middle of the rack 55 will be restricted by the stop block 58 when it moves to the gear 56, so that the rotation angle of the plate is within 90 degrees, and at the same time, the rack 55 is prevented from leaving the rectangular tube 54.

[0021] Both the bottom module plate 20 and the upper module plate 30 have lead screw assemblies 80 at their ends on the connecting pipes 51. Each lead screw assembly 80 includes a lead screw 81, which is threadedly connected to a rack 55. A gear 82 is fixedly connected to the top of the lead screw 81. The lead screw 81 is rotatably connected to the end of a rectangular tube 54. A stacked gear 83 meshes with one side of the gear 82 and is rotatably connected to the rectangular tube 54. A gear 84 is fitted onto the steel pipe 10 and meshes with the stacked gear 83. Rotating the gear 84 drives the stacked gear 83 to rotate, which in turn drives the gear 82 to rotate. The lead screw 81 at the bottom of the gear 82 cooperates with the rectangular tube 54 to move the rack 55 back and forth within the tube. This causes the racks 55 on each plate to move under the push of the racks 55 at their ends, thereby causing the plate surfaces to rotate synchronously.

[0022] A semicircular plate 841 is symmetrically arranged on one side of the gear 4 84. The semicircular plate 841 is fixedly connected to the gear 4 84. Fixing ears 842 are fixedly connected to both ends of the semicircular plate 841. The fixing ears 842 have bolt holes 843. Screws and nuts can be connected into the bolt holes 843. By inserting the screws into the bolt holes 843 and tightening them with the nuts, the gear 4 84 can be firmly attached to the surface of the steel pipe 10. Bolt holes 844 are provided on the connecting pipes 51 on both sides of the bottom module plate 20 and the upper module plate 30. Fixing bolts 845 are threaded into the bolt holes 844. The bottom of the fixing bolts 845 is fixed. A rubber sheet 846 is fixedly connected. After the plate surface is adjusted to a suitable angle, the bottom module plate 20 and the upper module plate 30 can be firmly fixed to the steel pipe 10 by screwing the fixing bolt 845 into the bolt hole 844, preventing the steel pipe 10 from rotating and thus fixing the plate surface. At the same time, the rubber sheet 846 at the bottom of the fixing bolt 845 can increase the contact area between the fixing bolt 845 and the steel pipe 10, so that the bottom module plate 20 and the upper module plate 30 are more stably fixed to the steel pipe 10. Using this method, the angle between each plate surface can be adjusted at the same time by rotating the steel pipe 10. The self-locking purpose can be achieved by using the screw 81 for adjustment.

[0023] The buffer assembly 60 also includes a blocking rod 61. A gear 62 is fixedly connected to the blocking rod 61 near the steel pipe 10. A rack 63 meshes with one side of the gear 62. A slide rail 64 is fixedly connected to one side of the rectangular tube 54. The rack 63 is slidably connected to the slide rail 64, and the gear 62 is rotatably connected to the slide rail 64. A spring 65 is installed inside the slide rail 64. One end of the spring 65 is fixedly connected to the rack 63. When it is necessary to transport objects, the bottom module plate 20, the upper module plate 30, and the middle module plate 40 can be... Adjust the plate to be parallel to the steel pipe 10. At this point, a plane is formed between the plate surfaces. Place the top of the steel pipe 10 in a suitable position to transfer the object from top to bottom. When the object comes into contact with the blocking rod 61, the object causes the blocking rod 61 to rotate around the gear 62. The gear 62 drives the rack 62 to move within the slide 64. The rack 62 compresses the spring 65. The spring 65 is compressed, and the blocking rod 61 slows down the object's sliding speed under the reaction force of the spring 65, allowing the object to slide smoothly to the bottom.

[0024] A placement box 641 is fixedly connected to the bottom of the slide 64. A counterweight 642 is slidably connected inside the placement box 641. A spring plate 643 is fixedly connected to the top of the counterweight 642. The spring plate 643 is fixedly connected to the end of a spring 65. Rollers 644 are rotatably connected to both sides of the counterweight 642. The rollers 644 are slidably connected to the inner wall of the placement box 641. Several abutment strips 645 are fixedly connected to the bottom of the counterweight 642. When transporting objects, the steel pipe 10 is positioned appropriately, and the plate surface is slightly rotated by the adjusting component 50. At this time, the plate surface separates from the counterweight 642, and the counterweight 642... Under the influence of gravity, the counterweight moves along the direction of the placement box 642. The larger the angle between the steel pipe 10 and the ground, the longer the distance the counterweight 642 moves. The counterweight 642 drives the spring plate 643 to compress the spring 65. After being compressed, the spring 65 has a greater reaction force on the blocking rod 61, which makes the resistance force on the object when it slides down from top to bottom greater, thus preventing the object from falling too fast at a steep angle. Conversely, when the angle between the steel pipe 10 and the ground is small, the counterweight 642 moves a shorter distance along the placement box 641. At this time, the reaction force of the spring 65 on the blocking rod 61 is small, and the object can slide down at a suitable speed.

[0025] The conveying assembly 70 also includes a sliding trolley 71. Slide rails 72 are provided on the bottom module plate 20, upper module plate 30, and middle module plate 40. The intersection points of the slide rails 72 on the bottom module plate 20, upper module plate 30, and middle module plate 40 are aligned. Several sets of sliding trolleys 71 are provided, and connecting ropes 73 are arranged between them. By placing an object on the sliding trolley 71, the object, using its own weight, slides downwards along the slide rails 72 on the bottom module plate 20, upper module plate 30, and middle module plate 40. Simultaneously, an unloaded sliding trolley 71 slides to the top of the upper module plate 30 with the help of the connecting ropes 73, facilitating the storage of the next object. Using this method, the object, in conjunction with the pulleys of the sliding trolley 71, cycles back and forth, preventing damage to the surfaces of the bottom module plate 20, upper module plate 30, and middle module plate 40, while also ensuring a more stable descent.

[0026] The sliding trolley 71 includes a base 711, with long rods 712 fixedly connected to both ends of the base 711. A pulley 713 is rotatably connected to the end of the long rod 712. A long rod 714 is rotatably connected to the end of the long rod 712 away from the pulley 713. A pulley 715 is rotatably connected to the end of the long rod 714. When the base 711 passes the corner of the bottom module plate 20 and the upper module plate 30, the long rods 712 and 714 bend under the guidance of the pulleys 713 and 715, so that the base 711 can slide to the back of the bottom module plate 20, the upper module plate 30 and the middle module plate 40 at the corner.

[0027] The base 711 has holes 721 on both sides. A sliding groove 722 is formed between the holes 721 on the base 711. Two locking members 723 are slidably connected within the sliding groove 722. A lever 726 is fixedly connected to the outer wall of each locking member 723, extending beyond the base 711. A second spring 724 is disposed between the locking members 723, with both ends fixedly connected to the locking members 723. A [missing information - likely a device or component] is fixedly connected to the top of the base 711. After the bottom module plate 20, the upper module plate 30, and the middle module plate 40 are assembled, the connecting rope 73 is passed through the hole 721 in sequence, and the clamp 723 is pressed inward to disengage it from the hole 721. After the connecting rope 73 passes through, the clamp 723 is released, and the spring 724 pushes the clamp 723 to fix it to the connecting rope 73. Finally, the connecting rope 73 is knotted. In this way, the sliding carts 71 are connected in sequence. The top placement basket 725 is used to place objects.

[0028] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0029] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A stair tread for scaffolding, characterized in that, include: Steel pipe (10), there are two steel pipes (10); Bottom module plate (20), the bottom module plate (20) is disposed on one side of the steel pipe (10); Upper module plate (30), the upper module plate (30) is disposed on the other side of the steel pipe (10); The middle module plate (40) is at least one set and is disposed between the bottom module plate (20) and the upper module plate (30); An adjustment component (50) is provided on the steel pipe (10). The adjustment component (50) is used to adjust the angle between the bottom module plate (20), the upper module plate (30) and the middle module plate (40) and the steel pipe (10). A buffer assembly (60) is disposed between steel pipes (10); A conveying assembly (70) is used in conjunction with a buffer assembly (60) to convey objects from high to low. The buffer assembly (60) also includes a blocking rod (61), a gear five (62) is fixedly connected to the side of the blocking rod (61) near the steel pipe (10), a rack two (63) meshes with the side of the gear five (62), a slide rail (64) is fixedly connected to the side of the rectangular tube (54), the rack two (63) is slidably connected to the slide rail (64), the gear five (62) is rotatably connected to the slide rail (64), a spring one (65) is provided in the slide rail (64), one end of the spring one (65) is fixedly connected to the rack two (63); The bottom of the slide (64) is fixedly connected to a placement box (641), a counterweight (642) is slidably connected inside the placement box (641), a spring plate (643) is fixedly connected to the top of the counterweight (642), the spring plate (643) is fixedly connected to the end of a spring (65), a pulley (644) is rotatably connected to both sides of the counterweight (642), the pulley (644) is slidably connected to the inner wall of the placement box (641), and several abutment strips (645) are fixedly connected to the bottom of the counterweight (642). The conveying assembly (70) also includes a sliding trolley (71). The bottom module plate (20), the upper module plate (30) and the middle module plate (40) are provided with slide rails (72). The intersection points of the slide rails (72) on the bottom module plate (20), the upper module plate (30) and the middle module plate (40) match. There are several sets of sliding trolleys (71). A connecting rope (73) is provided between the sliding trolleys (71). The sliding trolley (71) includes a base (711), with a long rod (712) fixedly connected to both ends of the base (711), a pulley (713) rotatably connected to the end of the long rod (712), a long rod (714) rotatably connected to the end of the long rod (712) away from the pulley (713), and a pulley (715) rotatably connected to the end of the long rod (714). The base (711) has holes (721) on both sides. The base (711) has a sliding groove (722) between the holes (721). A locking piece (723) is slidably connected in the sliding groove (722). There are two locking pieces (723). A lever (726) is fixedly connected to the outer wall of the locking piece (723). The lever (726) extends out of the base (711). A second spring (724) is provided between the locking pieces (723). The two ends of the second spring (724) are fixedly connected to the locking piece (723). A basket (725) is fixedly connected to the top of the base (711).

2. The stair treads for scaffolding according to claim 1, characterized in that: The adjustment component (50) includes a connecting pipe (51), which is sleeved on the steel pipe (10). One side of the connecting pipe (51) is a sleeve part (52). Rotating rollers (53) are fixedly connected to both sides of the bottom module plate (20), the upper module plate (30), and the middle module plate (40). The rotating rollers (53) are rotatably connected to the sleeve part (52). A rectangular tube (54) is fixedly connected to the bottom of the sleeve part (52). The front and rear ends of the rectangular tube (54) are open. A rack (55) is slidably connected inside the rectangular tube (54). A gear (56) is fixedly connected to the outer wall of the rotating roller (53). The rack (55) meshes with the gear (56) and the rack (55) abuts against each other.

3. A stair tread for scaffolding according to claim 2, characterized in that: The front half of the rack (55) is provided with teeth, and the front end of the rack (55) and the end of the teeth are fixedly connected to the limit block (57). The rectangular tube (54) is fixedly connected to the stop block (58) on both sides of the gear (56).

4. A stair tread for scaffolding according to claim 2, characterized in that: The bottom module plate (20) and the upper module plate (30) are equipped with screw assemblies (80) at the ends of the connecting pipes (51). The screw assembly (80) includes a screw (81), which is threadedly connected to a rack (55). A gear (82) is fixedly connected to the top of the screw (81). The screw (81) is rotatably connected to the end of a rectangular tube (54). A stacked gear (83) meshes with one side of the gear (82). The stacked gear (83) is rotatably connected to the rectangular tube (54). A gear (84) is sleeved on the steel pipe (10). The gear (84) meshes with the stacked gear (83).

5. A stair tread for scaffolding according to claim 4, characterized in that: A semicircular plate (841) is symmetrically arranged on one side of the gear four (84). The semicircular plate (841) is fixedly connected to the gear four (84). Fixing ears (842) are fixedly connected to both ends of the semicircular plate (841). Bolt hole one (843) is opened on the fixing ear (842). Bolt hole two (844) is opened on the connecting pipe (51) on both sides of the bottom module plate (20) and the upper module plate (30). Fixing bolt (845) is internally threaded in the bolt hole two (844). Rubber sheet (846) is fixedly connected to the bottom of the fixing bolt (845).

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