Production and processing device for bottom shell of pressure regulator

Abstract

The invention discloses a production and processing device for a bottom shell of a pressure regulator, and relates to the technical field of production and processing of pressure regulators. The device comprises a workbench, a clamping centering mechanism and a machining and grinding mechanism are arranged on the workbench, a baffle is fixedly connected to the top of the workbench, a first hydraulic cylinder is fixedly connected to the rear side of the baffle, an output shaft of the first hydraulic cylinder slidably penetrates through the baffle, a first sliding block is fixedly connected to the output shaft of the first hydraulic cylinder, and a second sliding block is fixedly connected to the output shaft of the second hydraulic cylinder. A first sliding block is arranged above the workbench, a female die is arranged above the first sliding block, the female die is fixedly connected with the workbench, a first support is arranged above the female die, the first support is fixedly connected with the workbench, and a second hydraulic cylinder is fixedly connected to the top of the first support. The problems that in the using process of an existing pressure regulator bottom shell machining device, clamping and fixing are not stable, so that a shell shakes, the roughness degree of the polished surface of a material is possibly inconsistent, the attractiveness and using performance of a product are affected, and therefore the production efficiency is reduced are solved.

Description

Technical Field

[0001] The invention belongs to the technical field of voltage regulator production and processing, and in particular relates to a production and processing device for a voltage regulator bottom shell. Background Art

[0002] The bottom shell of the voltage regulator is an important component of the voltage regulator. It mainly plays the role of protecting the internal structure and components of the voltage regulator. At the same time, it also needs to have good heat dissipation and sealing performance. With the continuous development of industrial technology, the production and processing requirements for the bottom shell of the voltage regulator are becoming higher and higher.

[0003] However, during use, the existing voltage regulator bottom shell processing device has unstable clamping and fixing, which causes the shell to shake, and may lead to inconsistent roughness of the polished surface of the material, affecting the appearance and performance of the product, thereby reducing production efficiency. Summary of the invention

[0004] The object of the present invention is to provide a production and processing device for a voltage regulator bottom shell. By setting a centering clamping mechanism, the problem of unstable clamping and fixing of the existing voltage regulator bottom shell processing device during use is solved, which causes the shell to shake, and may lead to inconsistent roughness of the polished surface of the material, affecting the appearance and performance of the product, thereby reducing production efficiency.

[0005] In order to solve the above technical problems, the present invention is achieved through the following technical solutions:

[0006] The present invention is a production and processing device for a voltage regulator bottom shell, comprising a workbench, wherein the workbench is provided with a clamping and centering mechanism, a processing and polishing mechanism, and a buffer mechanism;

[0007] A plurality of supporting legs are fixedly connected to the bottom of the workbench, and the clamping and centering mechanism includes a longitudinal moving component and a transverse clamping component. The longitudinal moving component includes a motor 1 fixedly connected to the front side of the workbench, a threaded rod 1 is rotatably penetrated on the front inner wall of the workbench, and the front side of the threaded rod 1 is rotatably extended to the outside of the workbench, the output shaft of the motor 1 is fixedly connected to the threaded rod 1 through a coupling, and a slider 1 is threadedly penetrated on the outer wall of the threaded rod 1.

[0008] Furthermore, a short plate is fixedly connected to the top of the workbench, a slide groove 2 is provided on the top of the short plate, and the bottom of the slider 1 slides and extends into the slide groove 2. The transverse clamping assembly includes a long plate fixedly connected to the front side of the short plate, a slide groove 3 is provided on the top of the long plate, and a clamping claw is slidably connected to the inner wall of the slide groove 3. Two transmission connecting rods are hingedly provided on the top of the slider 1, and the two transmission connecting rods are respectively hinged to the two clamping claws on the side away from the slider 1.

[0009] Furthermore, the processing and grinding mechanism includes a buffer component and a grinding component, the buffer component includes a bracket 1 fixedly connected to the top of the workbench, a threaded rod 2 is threadedly penetrated at the central axis of the bracket 1, a handle is fixedly connected to the top side extension of the threaded rod 2, and a transmission pressure plate is rotatably connected to the bottom side extension of the threaded rod 2.

[0010] Furthermore, the bottom of the transmission pressure plate is fixedly connected to a fixed plate 1, and the top of the workbench is fixedly connected to two limit shafts 1, the tops of the two limit shafts 1 slide through the fixed plate 1 and extend to the outside, and the outer walls of the two limit shafts 1 are sleeved with springs 1, the tops of the two springs 1 are fixedly connected to the fixed plate 1, the tops of the two springs 1 are fixedly connected to the fixed plate 1, and the bottoms of the two springs 1 are fixedly connected to the workbench.

[0011] Furthermore, a motor 2 is fixedly connected to the top of the fixed plate 1, a rotating shaft 2 rotates through the central axis of the fixed plate 1, an output shaft of the motor 2 is fixedly connected to the rotating shaft 2 through a coupling, and a grinding wheel is fixedly connected to the bottom extension of the rotating shaft 2.

[0012] Furthermore, the buffer mechanism includes a transmission component and a buffer component 2, the transmission component includes a baffle fixedly connected to the top of the workbench, a hydraulic cylinder 1 is fixedly connected to the rear side of the baffle, the output shaft of the hydraulic cylinder 1 slides through the baffle, a slider 2 is fixedly connected to the output shaft of the hydraulic cylinder 1, a die is fixedly connected to the top of the workbench, a bracket 2 is fixedly connected to the top of the workbench, a hydraulic cylinder 2 is fixedly connected to the top of the bracket 2, the output shaft of the hydraulic cylinder 2 slides through the bracket 2, and a fixed plate 2 is fixedly connected to the output shaft of the hydraulic cylinder 2.

[0013] Furthermore, the buffer component 2 includes a plurality of transmission rods fixedly connected to the bottom of the fixed plate 2, the bottom of the transmission rods slides through the fixed plate 3 and extends to the outside, a punch is fixedly connected to the bottom extension portion of the transmission rod, and springs 2 are sleeved on the outer walls of the plurality of transmission rods, the tops of the plurality of springs 2 are fixedly connected to the hydraulic cylinder 2, and the bottoms of the plurality of springs 2 are fixedly connected to the fixed plate 3.

[0014] Furthermore, the top of the fixed plate three is fixedly connected with a plurality of limit blocks one, the top hinges of the plurality of limit blocks one are all provided with transmission hinged rods, the bottom of the fixed plate two is fixedly connected with a plurality of fixed blocks, two sliding rods are fixedly connected between the plurality of fixed blocks, the outer walls of the two sliding rods are slidably connected with a plurality of limit blocks two, the bottoms of the plurality of limit blocks two are respectively hinged with a plurality of transmission hinged rods, the outer walls of the two sliding rods are respectively provided with springs three, and the left and right sides of the two springs three are respectively fixedly connected with a plurality of limit blocks two.

[0015] The present invention has the following beneficial effects:

[0016] 1. By setting the clamping and centering mechanism, start the motor 1, the motor rotates to drive the threaded rod 1 to rotate, the threaded rod 1 drives the slider 2 to slide on the slide slot 2, the slide slot 2 slides forward, and the transmission connecting rod drives the clamping claws to move towards each other for centering clamping, so that the positioning reference is more accurate, always facing the grinding component, the clamping force can continuously stabilize the material, and it is not easy to shake during the grinding process, resulting in the scrapping of the unevenly polished material, thereby improving production efficiency;

[0017] 2. By setting up the grinding mechanism, start the second motor to drive the grinding wheel to rotate and prepare to start grinding. By rotating the handle, the transmission pressure plate is driven to press the fixed plate downward. The fixed plate is squeezed and then presses the spring to move downward, so that the grinder can always move smoothly during the grinding process to avoid the grinding shell not meeting the standards due to moving too fast or shaking during the grinding process, thereby affecting production efficiency.

[0018] 3. By setting a buffer mechanism, when hydraulic cylinder 1 pushes slider 2 to slide in slide groove 1, hydraulic cylinder 1 is closed and hydraulic cylinder 2 is opened when slide groove 1 just exceeds the concave die. Hydraulic cylinder 2 will squeeze fixed plate 2 downward. Since fixed plate 2 is fixedly connected to several transmission rods, transmission will be performed. The transmission rod will pass through fixed plate 3 to squeeze the punch downward for stamping. Spring 2 will be blocked and deformed for buffering and shock absorption. At the same time, since the distance between fixed plate 2 and fixed plate 3 is close, extrusion will occur. Fixed plate 2 is subjected to the force transmitted by the transmission hinge rod to squeeze spring 3 to make it slide on the slide rod, which will also play the role of force decomposition buffer, so that these impact forces can be effectively absorbed and dispersed, the vibration amplitude of the mold can be reduced, the mold can be protected, the service life of the mold can be increased, and the excessive force on the stamping shell can be avoided to affect the production quality of the shell.

[0019] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for describing the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0021] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0022] Figure 2 It is a left side cross-sectional structural schematic diagram of the present invention;

[0023] Figure 3 It is a partial cross-sectional structural schematic diagram of the clamping and centering mechanism of the present invention;

[0024] Figure 4 It is a partial cross-sectional structural schematic diagram of the present invention;

[0025] Figure 5 For the present invention Figure 4 A is a schematic diagram of the enlarged structure of the middle part;

[0026] Figure 6 For the present invention Figure 2 Schematic diagram of the enlarged structure of B;

[0027] Figure 7 For the present invention Figure 3 Schematic diagram of the enlarged structure of C in the middle;

[0028] Figure 8 For the present invention Figure 2 Schematic diagram of the enlarged structure of D in the figure.

[0029] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0030] 1. Workbench; 101. Support leg; 102. Fixed block; 103. Slideway 1; 2. Clamping and centering mechanism; 21. Longitudinal moving assembly; 211. Motor 1; 212. Threaded rod 1; 213. Slider 1; 214. Short plate; 215. Slideway 2; 22. Horizontal clamping assembly; 221. Long plate; 222. Slideway 3; 223. Clamping claw; 224. Transmission connecting rod; 3. Processing and polishing mechanism; 31. Buffer assembly 1; 311. Bracket 1; 312. Threaded rod 2; 313. Handle; 314. Transmission pressure plate; 315. Fixed plate 1; 316. Limiting shaft 1; 317, spring one; 32, grinding assembly; 321, motor two; 322, rotating shaft two; 323, grinding wheel; 4, buffer mechanism; 41, transmission assembly; 411, baffle; 412, hydraulic cylinder one; 413, slider two; 414, die; 415, bracket two; 416, hydraulic cylinder two; 417, fixed plate two; 42, buffer assembly two; 421, transmission rod; 422, fixed plate three; 423, punch; 424, spring two; 425, limit block one; 426, transmission hinge rod; 427, limit block two; 428, slide rod; 429, spring three. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] See also Figure 1-8 As shown, the present invention is a production and processing device for a voltage regulator bottom shell, including a workbench 1, on which a clamping and centering mechanism 2, a processing and grinding mechanism 3 and a buffer mechanism 4 are arranged, and a plurality of supporting legs 101 are fixedly connected to the bottom of the workbench 1, and the clamping and centering mechanism 2 includes a longitudinal moving component 21 and a transverse clamping component 22, and the longitudinal moving component 21 includes a motor 211 fixedly connected to the front side of the workbench 1, and a threaded rod 212 is rotatably penetrated on the inner wall of the front side of the workbench 1, and the front side of the threaded rod 212 is rotatably extended to the outside of the workbench 1, and the output shaft of the motor 211 is fixedly connected to the threaded rod 212 through a coupling, and a slider 213 is threadedly penetrated on the outer wall of the threaded rod 212, and a short plate 21 is fixedly connected to the top of the workbench 1 4. A second slide groove 215 is provided on the top of the short plate 214, and the bottom of the slider 1 213 slides and extends into the second slide groove 215. The transverse clamping assembly 22 includes a long plate 221 fixedly connected to the front side of the short plate 214, and a third slide groove 222 is provided on the top of the long plate 221. A clamping claw 223 is slidably connected to the inner wall of the third slide groove 222. Two transmission connecting rods 224 are hingedly provided on the top of the slider 1 213, and the two transmission connecting rods 224 are hingedly connected to the two clamping claws 223 on the side away from the slider 1 213 respectively. By setting the clamping and centering mechanism 2, the positioning reference is more accurate and always faces the grinding assembly 32. The clamping force can continuously stabilize the material, and the material is not easy to shake during the grinding process, resulting in the scrapping of the unevenly polished material, thereby improving the production efficiency.

[0033] The processing and grinding mechanism 3 includes a buffer component 31 and a grinding component 32. The buffer component 31 includes a bracket 311 fixedly connected to the top of the workbench 1. A threaded rod 312 is threadedly penetrated at the central axis of the bracket 311. A handle 313 is fixedly connected to the top extension of the threaded rod 312. A transmission pressure plate 314 is rotatably connected to the bottom extension of the threaded rod 312. A fixed plate 315 is fixedly connected to the bottom of the transmission pressure plate 314. Two limiting shafts 316 are fixedly connected to the top of the workbench 1. The tops of the two limiting shafts 316 both slide through the fixed plate 315 and extend to the outside. The outer walls of the two limiting shafts 316 are both sleeved with springs 317. The tops of the two springs 317 are They are fixedly connected to the fixed plate 315, the tops of the two springs 317 are fixedly connected to the fixed plate 315, the bottoms of the two springs 317 are fixedly connected to the workbench 1, the top of the fixed plate 315 is fixedly connected to the motor 2 321, the central axis of the fixed plate 315 is rotated through by a rotating shaft 2 322, the output shaft of the motor 2 321 is fixedly connected to the rotating shaft 2 322 through a coupling, and a grinding wheel 323 is fixedly connected to the bottom extension of the rotating shaft 2 322. By setting the processing and grinding mechanism 3, the grinding component 32 can always keep moving smoothly during the grinding process, so as to avoid the grinding component 32 from moving too fast or shaking during the grinding process, resulting in an uneven grinding surface and substandard shell, which affects the production efficiency.

[0034] The buffer mechanism 4 includes a transmission component 41 and a buffer component 2 42, wherein the transmission component 41 includes a baffle plate 411 fixedly connected to the top of the workbench 1, a hydraulic cylinder 1 412 is fixedly connected to the rear side of the baffle plate 411, the output shaft of the hydraulic cylinder 1 412 slides through the baffle plate 411, a slider 2 413 is fixedly connected to the output shaft of the hydraulic cylinder 1 412, a die 414 is fixedly connected to the top of the workbench 1, a bracket 2 415 is fixedly connected to the top of the workbench 1, a hydraulic cylinder 2 416 is fixedly connected to the top of the bracket 2 415, the output shaft of the hydraulic cylinder 2 416 slides through the bracket 2 415, a fixed plate 2 417 is fixedly connected to the output shaft of the hydraulic cylinder 2 416, and the buffer component 2 42 includes a plurality of transmission rods 421 fixedly connected to the bottom of the fixed plate 2 417, the bottom of the transmission rod 421 slides through the fixed plate 3 422 and extends to the outside, and the bottom side extension of the transmission rod 421 is fixedly connected There is a convex mold 423, and the outer walls of several transmission rods 421 are sleeved with springs 424, and the tops of several springs 424 are fixedly connected to the hydraulic cylinder 416, and the bottoms of several springs 424 are fixedly connected to the fixed plate 3 422, and the top of the fixed plate 3 422 is fixedly connected with several limit blocks 425, and the tops of several limit blocks 425 are hinged with transmission hinge rods 426, and the bottom of the fixed plate 2 417 is fixedly connected to the hydraulic cylinder 416. There are several fixed blocks 102 fixedly connected, two slide bars 428 are fixedly connected between the several fixed blocks 102, several limit blocks 427 are slidably connected on the outer walls of the two slide bars 428, the bottoms of the several limit blocks 427 are respectively hinged with several transmission hinge rods 426, and springs 3 429 are sleeved on the outer walls of the two slide bars 428, and the left and right sides of the two springs 3 429 are respectively fixedly connected with several limit blocks 2 427. By setting the buffer mechanism 4, these impact forces can be effectively absorbed and dispersed, the vibration amplitude of the mold can be reduced, the mold can be protected, the service life of the mold can be increased, and the excessive force on the stamping shell can be avoided to affect the production quality of the shell.

[0035] A specific application of this embodiment is as follows: first, the material is placed in the concave die 414, and after the material is placed according to the position of the die, the hydraulic cylinder 1 412 is turned on. The hydraulic cylinder 1 412 will drive the slider 2 413 to slide in the slide groove 103. When the slide groove 103 just exceeds the concave die 414, the hydraulic cylinder 1 412 is turned off, and the hydraulic cylinder 2 416 is turned on. The hydraulic cylinder 2 416 will press the fixed plate 2 417 downwards. The fixed plate 2 417 is fixedly connected to a plurality of transmission rods 421, so transmission will be performed. The transmission rod 421 will pass through the fixed plate 3 422 and press the convex die 423 downwards for stamping. The spring 2 424 will be blocked and deformed for buffering and shock absorption. At the same time, since the distance between the fixed plate 2 417 and the fixed plate 3 422 is close, extrusion will occur. The fixed plate 2 417 is subjected to the force transmitted by the transmission hinge rod 426 to squeeze the spring 3 429 so that it is pressed on the slide rod 42 8, sliding on the slide will also play a role in decomposition force buffering. The material after stamping will fall into the slide groove 103, and then the hydraulic cylinder 412 will be opened again. The hydraulic cylinder 412 pushes the die-cast material to slide in the slide groove 103. After it is pushed to the position of the clamping and centering mechanism 2, the motor 211 is started. The rotation of the motor drives the threaded rod 212 to rotate. The threaded rod 212 drives the slider 213 to slide on the slide groove 215. The slider 213 slides forward, and the transmission connecting rod 224 drives the clamping claw 223 to move toward each other for centering clamping. After clamping, the motor 2 321 is started to drive the grinding wheel 323 to rotate and prepare to start grinding. The transmission pressure plate 314 is driven by rotating the handle 313 to press the fixed plate 315 downward. The fixed plate 315 is squeezed and then compresses the spring to move downward. The position of the shell can also be changed to perform fixed clamping and grinding again. After grinding, the shell is taken out.

[0036] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0037] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A production and processing device for a voltage regulator bottom shell, comprising a workbench (1), characterized in that: The workbench (1) is provided with a clamping and centering mechanism (2), a processing and polishing mechanism (3) and a buffer mechanism (4); The bottom of the workbench (1) is fixedly connected to a plurality of supporting legs (101); the clamping and centering mechanism (2) comprises a longitudinal moving assembly (21) and a transverse clamping assembly (22); the longitudinal moving assembly (21) comprises a motor (211) fixedly connected to the front side of the workbench (1); a threaded rod (212) is rotatably penetrated on the inner wall of the front side of the workbench (1); the front side of the threaded rod (212) is rotatably extended to the outside of the workbench (1); the output shaft of the motor (211) is fixedly connected to the threaded rod (212) via a coupling; a slider (213) is threadedly penetrated on the outer wall of the threaded rod (212).

2. The production and processing device of a voltage regulator bottom shell according to claim 1 is characterized in that: The top of the workbench (1) is fixedly connected with a short plate (214), the top of the short plate (214) is provided with a second slide groove (215), the bottom of the slider (213) slides and extends into the second slide groove (215), the transverse clamping assembly (22) comprises a long plate (221) fixedly connected to the front side of the short plate (214), the top of the long plate (221) is provided with a third slide groove (222), the inner wall of the third slide groove (222) is slidably connected with a clamping claw (223), the top of the slider (213) is hinged with two transmission connecting rods (224), and the two transmission connecting rods (224) are respectively hinged with the two clamping claws (223) on the side away from the slider (213).

3. The production and processing device of the voltage regulator bottom shell according to claim 2 is characterized in that: The processing and grinding mechanism (3) comprises a buffer component (31) and a grinding component (32), wherein the buffer component (31) comprises a bracket (311) fixedly connected to the top of the workbench (1), a threaded rod (312) is threadedly penetrated at the central axis of the bracket (311), a handle (313) is fixedly connected to the top extension of the threaded rod (312), and a transmission pressure plate (314) is rotatably connected to the bottom extension of the threaded rod (312).

4. The production and processing device of the voltage regulator bottom shell according to claim 3 is characterized in that: The bottom of the transmission pressure plate (314) is fixedly connected to a fixed plate 1 (315), and the top of the workbench (1) is fixedly connected to two limit shafts 1 (316). The tops of the two limit shafts 1 (316) slide through the fixed plate 1 (315) and extend to the outside. The outer walls of the two limit shafts 1 (316) are sleeved with springs 1 (317). The tops of the two springs 1 (317) are fixedly connected to the fixed plate 1 (315). The tops of the two springs 1 (317) are fixedly connected to the fixed plate 1 (315), and the bottoms of the two springs 1 (317) are fixedly connected to the workbench (1).

5. The production and processing device of the voltage regulator bottom shell according to claim 4 is characterized in that: The top of the fixed plate 1 (315) is fixedly connected to the motor 2 (321), the central axis of the fixed plate 1 (315) is rotatably penetrated by the rotating shaft 2 (322), the output shaft of the motor 2 (321) is fixedly connected to the rotating shaft 2 (322) via a coupling, and the bottom extension of the rotating shaft 2 (322) is fixedly connected to a grinding wheel (323).

6. The production and processing device of the voltage regulator bottom shell according to claim 5, characterized in that: The buffer mechanism (4) comprises a transmission component (41) and a second buffer component (42), wherein the transmission component (41) comprises a baffle (411) fixedly connected to the top of the workbench (1), a hydraulic cylinder (412) fixedly connected to the rear side of the baffle (411), an output shaft of the hydraulic cylinder (412) slidingly passes through the baffle (411), a slider (413) fixedly connected to the output shaft of the hydraulic cylinder (412), a die (414) fixedly connected to the top of the workbench (1), a bracket (415) fixedly connected to the top of the workbench (1), a hydraulic cylinder (416) fixedly connected to the top of the bracket (415), an output shaft of the hydraulic cylinder (416) slidingly passes through the bracket (415), and a fixed plate (417) fixedly connected to the output shaft of the hydraulic cylinder (416).

7. The production and processing device of the voltage regulator bottom shell according to claim 6 is characterized in that: The buffer assembly 2 (42) includes a plurality of transmission rods (421) fixedly connected to the bottom of the fixed plate 2 (417), the bottom of the transmission rods (421) slides through the fixed plate 3 (422) and extends to the outside, a convex mold (423) is fixedly connected to the bottom extension portion of the transmission rods (421), and springs 2 (424) are sleeved on the outer walls of the plurality of transmission rods (421), the tops of the plurality of springs 2 (424) are fixedly connected to the hydraulic cylinder 2 (416), and the bottoms of the plurality of springs 2 (424) are fixedly connected to the fixed plate 3 (422).

8. The production and processing device of the voltage regulator bottom shell according to claim 7 is characterized in that: The top of the fixed plate three (422) is fixedly connected to a plurality of limit blocks one (425), and the tops of the plurality of limit blocks one (425) are hingedly provided with transmission hinged rods (426). The bottom of the fixed plate two (417) is fixedly connected to a plurality of fixed blocks (102), and two sliding rods (428) are fixedly connected between the plurality of fixed blocks (102). The outer walls of the two sliding rods (428) are slidably connected to a plurality of limit blocks two (427), and the bottoms of the plurality of limit blocks two (427) are respectively hingedly connected to a plurality of transmission hinged rods (426). The outer walls of the two sliding rods (428) are sleeved with springs three (429), and the left and right sides of the two springs three (429) are respectively fixedly connected to a plurality of limit blocks two (427).

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