Automobile brake master cylinder detector

Abstract

The utility model relates to an automobile brake master cylinder detector which comprises a detection table, the upper surface of the detection table is fixedly connected with a first supporting mechanism and a second supporting mechanism, the upper surfaces of the first supporting mechanism and the second supporting mechanism are symmetrically and fixedly connected with limiting plates, and the symmetrically arranged limiting plates are rotatably connected with first butterfly-shaped adjusting bolts. External thread teeth at the two ends of the first butterfly-shaped adjusting bolt are arranged in opposite directions, movable plates are symmetrically connected to the first butterfly-shaped adjusting bolt in a threaded mode, clamping mechanisms are hinged to the symmetrically-arranged movable plates, and a third supporting mechanism is fixedly connected to the upper surface of the detection table. According to the scheme, during use, the heights of the two clamping mechanisms can be adjusted through the first supporting mechanism and the second supporting mechanism correspondingly, the arranged clamping mechanisms can only move up and down while the first supporting mechanism and the second supporting mechanism are subjected to telescopic adjustment, and therefore the situation that the clamping mechanisms rotate is avoided as much as possible; and the device is more convenient to use.

Description

Technical Field

[0001] This application relates to the technical field of vehicle detection, and particularly to a vehicle brake master cylinder detector. Background Art

[0002] The master cylinder in an automotive braking system is a key component responsible for converting the force on the pedal into hydraulic pressure and transmitting it to the vehicle's braking system. It typically consists of a piston and multiple sealing rings, with brake fluid inside. When the brake pedal is depressed, the piston in the master cylinder pushes the liquid to other parts of the braking system, causing the brake pads or brake drums to contact the wheels, thereby decelerating or stopping the vehicle. The design of the master cylinder allows for hydraulic transmission while maintaining the liquid's seal to ensure the normal operation of the braking system. If there is a leak or damage in the master cylinder, it may lead to brake failure or poor braking, endangering driving safety. Therefore, when manufacturing or repairing an automotive brake master cylinder, it is necessary to use an automotive brake master cylinder detector to detect the core of the automotive brake master cylinder.

[0003] The utility model with the publication number CN215218077U discloses an automotive brake master cylinder detector, which includes a base. Two support columns are connected to the upper end of the base. The support columns are threadedly connected with a second threaded rod. The second threaded rod is connected with a first rotating rod. The upper end of the second threaded rod is connected with a rotating column. The rotating column is connected with a rotating frame. The rotating frame is rotatably connected with two clamping rings. The clamping rings are provided with slots. One side of the slot is rotatably connected with a third threaded rod. The third threaded rod is threadedly connected with a hand-twisting bolt. The base is connected with a detection device. The detection device is connected with a spiral tube and a spiral wire. The base is slidably connected with a telescopic sleeve. The telescopic sleeve is slidably connected with a telescopic rod. The telescopic sleeve is threadedly connected with a fixing bolt. The fixing bolt passes through the telescopic sleeve and abuts against the surface of the telescopic rod. The telescopic rod is connected with a telescopic device. The side end of the telescopic sleeve close to the base is connected with a first threaded rod. The first threaded rod is threadedly connected with a threaded sleeve. This utility model fixes the automotive brake master cylinder detector through clamping rings with adjustable height, and there will be no sliding situation, thereby improving the detection efficiency and effect.

[0004] When the above technical solution is in use, the two clamping rings provided can clamp and limit the automotive brake master cylinder to be detected. And before clamping the automotive brake master cylinder with the clamping rings, the height of the clamping rings can be adjusted by controlling the rotation of the second threaded rod through the first rotating rod. However, when the second threaded rod rotates and adjusts, the set clamping rings will rotate accordingly. After the height of the clamping rings is adjusted by the personnel, in order to clamp the automotive brake master cylinder, it is also necessary to rotate and adjust the positions of the two clamping rings, which may be inconvenient to use and is not conducive to actual use. Therefore, those skilled in the art have provided an automotive brake master cylinder detector to solve the problems raised in the above background art. Utility Model Content

[0005] In order to solve the problem raised in the above background technology that when the second threaded rod is rotated and adjusted, the clamping ring will follow the rotation, and after the personnel completes the height adjustment of the clamping ring, in order to clamp the automobile brake master cylinder, it is also necessary to rotate and adjust the positions of the two clamping rings, which may be inconvenient during use, the present application provides an automobile brake master cylinder tester.

[0006] The present application provides a vehicle brake master cylinder detector adopts the following technical solution:

[0007] A vehicle brake master cylinder tester includes a test platform, the upper surface of which is fixedly connected to a first supporting mechanism and a second supporting mechanism, the upper surfaces of the first supporting mechanism and the second supporting mechanism are symmetrically fixedly connected to limit plates, the symmetrically arranged limit plates are rotatably connected to a first butterfly adjustment bolt, the external thread teeth at both ends of the first butterfly adjustment bolt are arranged in opposite directions, the first butterfly adjustment bolt is symmetrically threadedly connected to a moving plate, the symmetrically arranged moving plate is hinged with a clamping mechanism, the upper surface of the test platform is fixedly connected to a third supporting mechanism, the third supporting mechanism is located in the same horizontal plane as the first supporting mechanism and the second supporting mechanism, the third supporting mechanism is fixedly connected to a telescopic device, and a test device is placed on the upper surface of the test platform.

[0008] By adopting the above technical solution, the heights of the two clamping mechanisms can be adjusted respectively through the first supporting mechanism and the second supporting mechanism, and while the first supporting mechanism and the second supporting mechanism are telescopically adjusted, the clamping mechanism can only move up and down, thereby minimizing the rotation of the clamping mechanism, making the present application more convenient to use.

[0009] Preferably, the first supporting mechanism has the same structure as the second supporting mechanism and the third supporting mechanism, the first supporting mechanism includes a supporting seat fixedly connected to the upper surface of the detection platform, an adjusting component is movably connected to the supporting seat, a lifting plate is threadedly connected to the adjusting component, the lifting plate is located above the supporting seat, a guide rod is symmetrically fixedly connected to the upper surface of the supporting seat, and the outer wall of the guide rod is slidably connected to the inner wall of the lifting plate.

[0010] By adopting the above technical solution, the support seat can limit the installation position of the adjustment component. By cooperating with the adjustment component and the symmetrically arranged guide rods, the lifting plate can be controlled to move up and down. The height of the clamping mechanism can be adjusted by moving the lifting plate.

[0011] Preferably, the clamping mechanism includes a first arc-shaped clamping plate and a second arc-shaped clamping plate. The bottom ends of the first arc-shaped clamping plate and the second arc-shaped clamping plate are hinged to each other. First connecting lugs are fixedly connected to the outer walls of the first arc-shaped clamping plate and the second arc-shaped clamping plate. The first connecting lugs are hinged to the moving plate. Anti-slip pads are fixedly connected to the inner walls of the first arc-shaped clamping plate and the second arc-shaped clamping plate.

[0012] By adopting the above technical solution, the two first connecting lugs can be respectively hinged to the symmetrically arranged moving plates. When the symmetrically arranged moving plates move towards or away from each other, the first arc-shaped clamping plate and the second arc-shaped clamping plate can be controlled to open and close along the hinged part.

[0013] Preferably, the telescopic device includes a hydraulic cylinder fixedly connected to the third support mechanism. The output end of the hydraulic cylinder is fixedly connected with a second connecting lug. A second butterfly adjusting bolt is threadedly connected to the second connecting lug. The external thread teeth on the second butterfly adjusting bolt are arranged unidirectionally.

[0014] By adopting the above technical solution, the second connecting lug can be connected to the push rod of the automotive master cylinder through cooperation with the second butterfly adjusting bolt. By starting the hydraulic cylinder, the usage scenario of the automotive master cylinder can be simulated.

[0015] Preferably, the detection device includes a detector body located on the detection table. Detection pipelines are symmetrically arranged on both sides of the detector body. Connecting heads are fixedly connected to the ends of the symmetrically arranged detection pipelines away from the detector body.

[0016] By adopting the above technical solution, the detection pipelines symmetrically arranged on both sides of the detector body can be respectively connected to the side holes of the automotive master cylinder through cooperation with the connecting heads.

[0017] Preferably, the adjusting assembly includes a butterfly adjusting head located on one side of the support seat. A shaft rod is fixedly connected to one side of the butterfly adjusting head. The end of the shaft rod away from the butterfly adjusting head penetrates through the support seat and is fixedly connected with a worm. The worm is located inside the support seat. A worm gear is meshed with the outer wall of the worm. A threaded rod is fixedly connected to the worm gear. The upper end of the threaded rod penetrates through the support seat and is threadedly connected to the inner wall of the lifting plate.

[0018] By adopting the above technical solution, when the butterfly adjusting head is rotated, the worm can be controlled to rotate through the shaft rod. By the rotation of the worm, the worm gear meshed with it can be driven to rotate. By the rotation of the worm gear, the threaded rod can be controlled to rotate.

[0019] In summary, the present application includes the following beneficial technical effects:

[0020] 1. The automobile brake master cylinder tester can adjust the symmetrically arranged moving plates to move toward or away from each other at the same time when the user rotates the first butterfly adjustment bolt. The symmetrically arranged moving plates can be moved at the same time to control the clamping mechanism to open and close and clamp the automobile brake master cylinder to be tested to limit the position. The heights of the two clamping mechanisms can be adjusted respectively by the first supporting mechanism and the second supporting mechanism. When the first supporting mechanism and the second supporting mechanism are telescopically adjusted, the clamping mechanism can only move up and down, thereby avoiding the rotation of the clamping mechanism as much as possible, making the application more convenient to use. By starting the telescopic device, the automobile brake master cylinder can be pushed to simulate the use scenario of the automobile brake master cylinder, which is convenient for the testing equipment to test the automobile brake master cylinder.

[0021] 2. The support seat of the automobile brake master cylinder tester can limit the installation position of the adjustment component. The adjustment component cooperates with the symmetrically arranged guide rod to control the lifting plate to move up and down. The height of the clamping mechanism can be adjusted by moving the lifting plate. When the butterfly-shaped adjustment head is rotated, the worm can be controlled to rotate through the shaft rod. The rotation of the worm can drive the worm wheel meshing with it to rotate, and the rotation of the worm wheel can control the rotation of the threaded rod;

[0022] 3. The automobile brake master cylinder tester has two first connecting ear plates that can be hinged to each other with the symmetrically arranged moving plates. When the symmetrically arranged moving plates move toward or away from each other, the first arc-shaped clamping plate and the second arc-shaped clamping plate can be controlled to open and close along the hinged parts. The second connecting ear plate can be connected to the push rod of the automobile brake master cylinder by cooperating with the second butterfly-shaped adjusting bolt. The use scenario of the automobile brake master cylinder can be simulated by starting the hydraulic cylinder. The detection pipelines symmetrically arranged on both sides of the tester body can be connected to the bypass hole of the automobile brake master cylinder by cooperating with the connecting heads respectively. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present application;

[0024] Figure 2 is a schematic diagram of the structure of the first support mechanism in an embodiment of the present application;

[0025] Figure 3 is a schematic cross-sectional structural diagram of the first supporting mechanism in an embodiment of the present application;

[0026] Figure 4 is a schematic diagram of the structure of the clamping mechanism in an embodiment of the present application;

[0027] Figure 5 It is a schematic diagram of the structure of the telescopic device in the embodiment of the present application.

[0028] Description of reference numerals: 1, inspection table; 2, first support mechanism; 201, support base; 202, adjustment assembly; 2021, butterfly adjustment head; 2022, shaft rod; 2023, worm; 2024, worm gear; 2025, threaded rod; 203, lifting plate; 204, guide rod; 3, second support mechanism; 4, limit plate; 5, first butterfly adjustment bolt; 6, moving plate; 7, clamping mechanism; 701, first arc-shaped clamping plate; 702, second arc-shaped clamping plate; 703, first connecting ear plate; 704, anti-slip pad; 8, third support mechanism; 9, telescopic device; 901, hydraulic cylinder; 902, second connecting ear plate; 903, second butterfly adjustment bolt; 10, inspection equipment; 1001, detector body; 1002, inspection pipeline; 1003, connector. Detailed implementation manners

[0029] The following further elaborates on this application with reference to the Figures 1-5 accompanying drawings.

[0030] An embodiment of this application discloses an automobile master cylinder detector. Referring to Figure 1 and Figure 2 , this automobile master cylinder detector includes an inspection table 1. The upper surface of the inspection table 1 is fixedly connected with a first support mechanism 2 and a second support mechanism 3. The upper surfaces of the first support mechanism 2 and the second support mechanism 3 are symmetrically and fixedly connected with limit plates 4. A first butterfly adjustment bolt 5 is rotatably connected to the symmetrically arranged limit plates 4. The external thread teeth at both ends of the first butterfly adjustment bolt 5 are arranged in the opposite direction. The first butterfly adjustment bolt 5 is symmetrically threadedly connected with moving plates 6. The symmetrically arranged moving plates 6 are hinged with a clamping mechanism 7. The upper surface of the inspection table 1 is fixedly connected with a third support mechanism 8. The third support mechanism 8 is on the same horizontal plane as the first support mechanism 2 and the second support mechanism 3. A telescopic device 9 is fixedly connected to the third support mechanism 8. An inspection equipment 10 is placed on the upper surface of the inspection table 1.

[0031] In the present embodiment, the test platform 1 provided in the automobile brake master cylinder tester can limit the installation positions of the first supporting mechanism 2 and the second supporting mechanism 3, and the upper surfaces of the first supporting mechanism 2 and the second supporting mechanism 3 are symmetrically fixedly connected with the limit plates 4, and the installation position of the first butterfly adjusting bolt 5 can be limited by the symmetrically arranged limit plates 4, and the external threaded teeth at both ends of the first butterfly adjusting bolt 5 are arranged in opposite directions, so that when the user rotates the first butterfly adjusting bolt 5, the symmetrically arranged moving plates 6 can be adjusted to move toward or away from each other at the same time, and the clamping mechanism 7 can be controlled to open and close by moving the symmetrically arranged moving plates 6 at the same time, and the automobile brake master cylinder to be tested can be clamped and limited by the opening and closing of the clamping mechanism 7, and there are two clamping mechanisms 7, which are respectively located on the first supporting mechanism 2 and the second supporting mechanism 3, through The first supporting mechanism 2 and the second supporting mechanism 3 are respectively capable of adjusting the heights of the two clamping mechanisms 7, and while the first supporting mechanism 2 and the second supporting mechanism 3 are telescopically adjusted, the clamping mechanism 7 can only be moved up and down, thereby minimizing the rotation of the clamping mechanism 7, making the application more convenient and more conducive to practical use. Furthermore, the height of the telescopic device 9 can be adjusted by the third supporting mechanism 8. The telescopic device 9 can be connected to the push rod of the automobile brake master cylinder when in use, and when detecting the automobile brake master cylinder, the detection equipment 10 also needs to be connected to the automobile brake master cylinder. Specifically, the automobile brake master cylinder can be pushed by starting the telescopic device 9, thereby simulating the use scenario of the automobile brake master cylinder, making it convenient for the detection equipment 10 to detect the automobile brake master cylinder.

[0032] In a further preferred embodiment of the present invention, Figure 1 As shown, the detection device 10 includes a detection instrument body 1001 located on the detection platform 1, and detection pipelines 1002 are symmetrically arranged on both sides of the detection instrument body 1001. The ends of the symmetrically arranged detection pipelines 1002 away from the detection instrument body 1001 are fixedly connected with connectors 1003.

[0033] In this embodiment, the detection pipelines 1002 symmetrically arranged on both sides of the detector body 1001 cooperate with the connectors 1003 respectively and can be connected to the bypass hole of the automobile brake master cylinder, so that the detector body 1001 can detect the automobile brake master cylinder.

[0034] In a further preferred embodiment of the present invention, Figure 2 and Figure 3As shown in the figure, the first support mechanism 2 has the same structure as the second support mechanism 3 and the third support mechanism 8. The first support mechanism 2 includes a support base 201 fixedly connected to the upper surface of the inspection table 1. An adjustment assembly 202 is movably connected to the support base 201. A lifting plate 203 is threadedly connected to the adjustment assembly 202. The lifting plate 203 is located above the support base 201. Guide rods 204 are symmetrically and fixedly connected to the upper surface of the support base 201. The outer wall of the guide rod 204 is slidably connected to the inner wall of the lifting plate 203.

[0035] In this embodiment, the support base 201 can limit the installation position of the adjustment assembly 202. The user can control the up and down movement of the lifting plate 203 by cooperating the adjustment assembly 202 with the symmetrically arranged guide rods 204. By moving the lifting plate 203, the height of the clamping mechanism 7 can be adjusted. Scale marks are provided on the support base 201, the lifting plate 203 and the guide rods 204, so as to facilitate the user to view the adjusted position.

[0036] In a further preferred embodiment of the present utility model, as Figure 2 and Figure 3 shown, the adjustment assembly 202 includes a butterfly adjustment head 2021 located on one side of the support base 201. A shaft rod 2022 is fixedly connected to one side of the butterfly adjustment head 2021. The end of the shaft rod 2022 away from the butterfly adjustment head 2021 penetrates through the support base 201 and is fixedly connected to a worm 2023. The worm 2023 is located inside the support base 201. A worm gear 2024 is meshed with the outer wall of the worm 2023. A threaded rod 2025 is fixedly connected to the worm gear 2024. The upper end of the threaded rod 2025 penetrates through the support base 201 and is threadedly connected to the inner wall of the lifting plate 203.

[0037] In this embodiment, when the user rotates the butterfly adjustment head 2021, the worm 2023 can be controlled to rotate through the provided shaft rod 2022. By rotating the worm 2023, the meshed worm gear 2024 can be driven to rotate. By rotating the worm gear 2024, the threaded rod 2025 can be controlled to rotate to adjust the up and down movement of the lifting plate 203.

[0038] In a further preferred embodiment of the present utility model, as Figure 2 and Figure 4 shown, the clamping mechanism 7 includes a first arc-shaped clamping plate 701 and a second arc-shaped clamping plate 702. The bottom ends of the first arc-shaped clamping plate 701 and the second arc-shaped clamping plate 702 are hinged to each other. First connecting ear plates 703 are fixedly connected to the outer walls of the first arc-shaped clamping plate 701 and the second arc-shaped clamping plate 702. The first connecting ear plates 703 are hinged to the moving plate 6. Anti-slip pads 704 are fixedly connected to the inner walls of the first arc-shaped clamping plate 701 and the second arc-shaped clamping plate 702.

[0039] In this embodiment, the bottom ends of the first arc-shaped clamping plate 701 and the second arc-shaped clamping plate 702 are hinged to each other, and the outer walls of the first arc-shaped clamping plate 701 and the second arc-shaped clamping plate 702 are fixedly connected with the first connecting ear plate 703, and the two first connecting ear plates 703 can be hinged to each other with the symmetrically arranged movable plates 6, so that when the symmetrically arranged movable plates 6 move toward or away from each other, the first arc-shaped clamping plate 701 and the second arc-shaped clamping plate 702 can be controlled to open and close along the hinged parts, and when the automobile brake master cylinder is clamped by the first arc-shaped clamping plate 701 and the second arc-shaped clamping plate 702, the friction between the automobile brake master cylinder and the automobile brake master cylinder can be increased by the rubber anti-skid pad 704, and the first arc-shaped clamping plate 701 and the second arc-shaped clamping plate 702 clamp the automobile brake master cylinder from the bottom thereof, so as to avoid obstruction by the fluid storage tank and the bypass hole on the automobile brake master cylinder when the automobile brake master cylinder is clamped.

[0040] In a further preferred embodiment of the present invention, Figure 1 and Figure 5 As shown, the telescopic device 9 includes a hydraulic cylinder 901 fixedly connected to the third supporting mechanism 8, the output end of the hydraulic cylinder 901 is fixedly connected to the second connecting ear plate 902, the second connecting ear plate 902 is threadedly connected to the second butterfly adjusting bolt 903, and the external thread teeth on the second butterfly adjusting bolt 903 are unidirectionally set.

[0041] In this embodiment, the second connecting ear plate 902 arranged at the output end of the hydraulic cylinder 901 can be connected to the push rod of the automobile brake master cylinder by cooperating with the second butterfly adjustment bolt 903, so that the use scenario of the automobile brake master cylinder can be simulated by starting the hydraulic cylinder 901.

[0042] The implementation principle of the automobile brake master cylinder detector of the embodiment of the present application is:

[0043] During use, the user rotates the first butterfly adjustment bolt 5 to simultaneously adjust the symmetrically arranged movable plates 6 to move toward or away from each other, and the symmetrically arranged movable plates 6 move simultaneously to control the clamping mechanism 7 to open and close and clamp and limit the vehicle brake master cylinder being tested. There are two clamping mechanisms 7, which can enhance the stability of clamping the vehicle brake master cylinder. The two clamping mechanisms 7 are respectively located on the first support mechanism 2 and the second support mechanism 3. The heights of the two clamping mechanisms 7 can be adjusted respectively by the first support mechanism 2 and the second support mechanism 3, and while the first support mechanism 2 and the second support mechanism 3 are telescopically adjusted, the clamping mechanism 7 can only move up and down, thereby minimizing the rotation of the clamping mechanism 7, making the use of the present application more convenient and more conducive to practical use.

[0044] The above are all preferred embodiments of this application, and the protection scope of this application is not limited thereby. Therefore, all equivalent changes made according to the structure, shape, and principle of this application shall be covered within the protection scope of this application.

Claims

1. A vehicle brake master cylinder tester, comprising a test bench (1), characterized in that: The upper surface of the detection platform (1) is fixedly connected with a first supporting mechanism (2) and a second supporting mechanism (3); the upper surfaces of the first supporting mechanism (2) and the second supporting mechanism (3) are symmetrically fixedly connected with a limit plate (4); the symmetrically arranged limit plate (4) is rotatably connected with a first butterfly adjustment bolt (5); the external thread teeth at both ends of the first butterfly adjustment bolt (5) are arranged in opposite directions; the first butterfly adjustment bolt (5) is symmetrically threadedly connected with a movable plate (6); the symmetrically arranged movable plate (6) is hinged with a clamping mechanism (7); the upper surface of the detection platform (1) is fixedly connected with a third supporting mechanism (8); the third supporting mechanism (8) is located on the same horizontal plane as the first supporting mechanism (2) and the second supporting mechanism (3); the third supporting mechanism (8) is fixedly connected with a telescopic device (9); and a detection device (10) is placed on the upper surface of the detection platform (1).

2. The vehicle brake master cylinder detector according to claim 1, characterized in that: The first supporting mechanism (2) has the same structure as the second supporting mechanism (3) and the third supporting mechanism (8), the first supporting mechanism (2) comprises a supporting seat (201) fixedly connected to the upper surface of the detection platform (1), an adjusting component (202) is movably connected to the supporting seat (201), a lifting plate (203) is threadedly connected to the adjusting component (202), the lifting plate (203) is located above the supporting seat (201), a guide rod (204) is symmetrically fixedly connected to the upper surface of the supporting seat (201), and the outer wall of the guide rod (204) is slidably connected to the inner wall of the lifting plate (203).

3. The vehicle brake master cylinder tester according to claim 1, characterized in that: The clamping mechanism (7) comprises a first arc-shaped clamping plate (701) and a second arc-shaped clamping plate (702), the bottom ends of the first arc-shaped clamping plate (701) and the second arc-shaped clamping plate (702) are hinged to each other, the outer walls of the first arc-shaped clamping plate (701) and the second arc-shaped clamping plate (702) are fixedly connected with a first connecting ear plate (703), the first connecting ear plate (703) and the movable plate (6) are hinged to each other, and the inner walls of the first arc-shaped clamping plate (701) and the second arc-shaped clamping plate (702) are fixedly connected with an anti-slip pad (704).

4. The vehicle brake master cylinder tester according to claim 1, characterized in that: The telescopic device (9) comprises a hydraulic cylinder (901) fixedly connected to the third supporting mechanism (8); the output end of the hydraulic cylinder (901) is fixedly connected to a second connecting ear plate (902); a second butterfly-shaped adjusting bolt (903) is threadedly connected to the second connecting ear plate (902); and the external thread teeth on the second butterfly-shaped adjusting bolt (903) are unidirectionally arranged.

5. The vehicle brake master cylinder tester according to claim 1, characterized in that: The detection device (10) comprises a detection instrument body (1001) located on the detection platform (1), detection pipelines (1002) are symmetrically arranged on both sides of the detection instrument body (1001), and the ends of the symmetrically arranged detection pipelines (1002) away from the detection instrument body (1001) are fixedly connected to connectors (1003).

6. The automobile brake master cylinder tester according to claim 2, characterized in that: The adjustment assembly (202) comprises a butterfly-shaped adjustment head (2021) located at one side of the support seat (201); a shaft (2022) is fixedly connected to one side of the butterfly-shaped adjustment head (2021); an end of the shaft (2022) away from the butterfly-shaped adjustment head (2021) passes through the support seat (201) and is fixedly connected to a worm (2023); the worm (2023) is located inside the support seat (201); a worm wheel (2024) is meshed on the outer wall of the worm (2023); a threaded rod (2025) is fixedly connected to the worm wheel (2024); an upper end of the threaded rod (2025) passes through the support seat (201) and is threadedly connected to the inner wall of the lifting plate (203).

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