Automobile suspension shock absorber bracket assembly

Abstract

The invention relates to an automobile suspension shock absorber bracket assembly, comprising an underframe and a roof frame located above the underframe, brake discs are fixed at both ends of the underframe, a suspension mechanism is arranged between the inner sides of the two brake discs and the bottom of the roof frame, the suspension mechanism comprises a buffer seat, a first connecting rod is penetrated at both ends of the buffer seat, a second connecting rod is arranged on the side of the first connecting rod away from the buffer seat, a first universal joint and a second universal joint are respectively fixed at one end of the first connecting rod and the second connecting rod close to each other, shock absorbers are arranged between the inner sides of the two brake discs and the two ends of the roof frame, and bracket mechanisms are arranged at both ends of the shock absorber; the problems in the existing patents that the active adjustment of the distance between the vehicle body and the ground is impossible, thus it is difficult to adjust the shock absorption of the vehicle body, the shock absorber cannot be installed and disassembled, and when it needs to be repaired or replaced, it can only be replaced as a whole, and the practicality is low.

Description

Technical Field

[0001] The invention relates to the technical field of automobile shock absorber brackets, in particular to an automobile suspension shock absorber bracket assembly. Background Art

[0002] A Chinese patent discloses a suspension fixing seat assembly for automobile parts (publication number: CN209305273U), which includes a vehicle body, a fixing seat is fixedly installed on the bottom of the vehicle body by bolts, the fixing seat is rotatably connected to a first connecting rod through a rotating shaft, a shock absorber is movably installed on the side of the first connecting rod, and a first fixing plate and a second fixing plate are respectively welded to both ends of the shock absorber.

[0003] In the above patent, it is impossible to actively adjust the distance between the vehicle body and the ground, so it is difficult to adjust the shock absorption of the vehicle body, and the shock absorber cannot be installed or disassembled. When it needs to be repaired or replaced, it can only be replaced as a whole, which has low practicality.

[0004] In order to solve the above defects, a technical solution is now provided. Summary of the invention

[0005] The object of the present invention is to provide a vehicle suspension shock absorber bracket assembly.

[0006] The technical problems to be solved by the present invention are as follows:

[0007] In the existing patents, it is impossible to actively adjust the distance between the vehicle body and the ground, so it is difficult to adjust the shock absorption of the vehicle body, and the shock absorber cannot be installed or disassembled. When it needs to be repaired or replaced, it can only be replaced as a whole, which has low practicality.

[0008] The purpose of the present invention can be achieved by the following technical solutions:

[0009] A vehicle suspension shock absorber bracket assembly comprises a vehicle chassis and a roof frame located above the vehicle chassis, brake discs are fixed at both ends of the vehicle chassis, a suspension mechanism is arranged between the inner sides of the two brake discs and the bottom of the roof frame, the suspension mechanism comprises a buffer seat, a first connecting rod is penetrated at both ends of the buffer seat, a second connecting rod is arranged on the side of the first connecting rod away from the buffer seat, a first universal joint and a second universal joint are respectively fixed at the ends of the first connecting rod and the second connecting rod close to each other, a universal joint assembly is arranged between the first universal joint and the second universal joint, shock absorbers are arranged between the inner sides of the two brake discs and the two ends of the roof frame, the shock absorber comprises a shock absorber seat, a shock absorber rod is penetrated and slidably connected at the bottom of the shock absorber seat, an extrusion plate is fixed at the top end of the shock absorber rod, an air chamber is arranged at the top of the extrusion plate, an air valve is arranged at one end of the shock absorber seat, the air valve is communicated with the inside of the air chamber, and a bracket mechanism is arranged at both ends of the shock absorber.

[0010] Furthermore, the bottom of the roof frame is slidably connected to two symmetrically distributed slides, one end of a second connecting rod is fixed to the inner side of the brake disc, and a telescopic rod is hingedly connected between one end of the other second connecting rod and the slide, wherein a first buffer spring is fixed between the top of the buffer seat and the roof frame.

[0011] Furthermore, the universal assembly includes a cross, and universal balls are fixed to the four ends of the cross respectively. The outer surface of the universal ball is sleeved with a universal sleeve, and the universal ball can rotate in the universal sleeve. The four universal sleeves are respectively fixed to the inside of the first universal joint and the second universal joint.

[0012] Furthermore, one end of the first connecting rod is located inside the buffer seat and is fixed with a limiting plate. The internal top and bottom ends of the buffer seat are slidably connected to two sliding seats. One side of the limiting plate is hingedly connected to the two sliding seats with a hinged rod, and a third buffer spring is fixed between the two limiting plates.

[0013] Furthermore, a buffer groove is formed through the surface of the hinged rod, and a fixed seat is fixed at the top and bottom ends of the buffer seat. A buffer rod passes through the fixed seat and is slidably connected thereto. A second buffer spring is fixed between one end of the buffer rod and the inner end wall of the fixed seat, and a movable block is fixed to the other end of the buffer rod, and the movable block is movably connected to the buffer groove.

[0014] Furthermore, a first shock-absorbing spring is sleeved on the outer surface of the shock-absorbing rod, and two ends of the first shock-absorbing spring are respectively fixed to the extrusion plate and the shock-absorbing seat, and ears are fixed to the bottom end of the shock-absorbing rod and the top of the shock-absorbing seat, and an installation groove is penetrated on the ear, and a second shock-absorbing spring is sleeved on the outer surface of the shock-absorbing seat, and two ends of the second shock-absorbing spring are respectively fixed to the shock-absorbing seat and the shock-absorbing rod.

[0015] Furthermore, the bracket mechanism includes a first support frame, the top and bottom of the first support frame are provided with openings, and both sides of the first support frame are slidably connected with clamping plates, and the sides of the two clamping plates close to each other are fixed with clamping columns adapted to the installation grooves, one of the clamping columns is fixed with a clamping block, and the other clamping column is provided with a clamping groove.

[0016] Furthermore, a buffer frame is fixed on one side of the two clamping plates away from each other, a buffer plate is slidably connected inside the buffer frame, a buffer air cushion is fixed between one end of the buffer plate and the buffer frame, the other end of the buffer plate passes through the first support frame and is slidably connected to the first support frame, a second support frame is fixed at both ends of the outside of the first support frame, a screw rod passes through the second support frame and is threadedly connected, one end of the screw rod is rotatably connected to the buffer plate, and a handle is fixed to the other end of the screw rod.

[0017] Beneficial effects of the present invention:

[0018] The suspension mechanism of the present invention can be flexibly arranged between the brake disc and the roof frame, which greatly reduces the impact on the vehicle body and improves the ground adhesion of the wheels. At the same time, the left and right wheels can bounce independently of each other, which can reduce the inclination and vibration of the vehicle body. The two ends of the shock absorber can be fixed between the brake disc and the end of the roof frame through the bracket mechanism, which can stably support the shock absorber. At the same time, the shock absorber can be easily disassembled and installed, thereby improving the applicability of the shock absorber.

[0019] By setting the suspension mechanism, the first buffer spring and the telescopic rod can achieve a buffering effect between the brake disc and the roof rack, which greatly reduces the impact on the vehicle body and improves the ground adhesion of the wheels. The first universal joint and the second universal joint cooperate with the universal assembly to achieve various movement forms of the brake disc and the roof rack and adapt to transmission between different angles. The two first connecting rods cooperate with the second buffer spring and the third buffer spring to adjust the length of the suspension mechanism and further achieve a buffering effect. The two suspension mechanisms are set at the same time, so that the left and right wheels can jump separately and independently of each other, thereby greatly reducing the inclination and vibration of the vehicle body.

[0020] By setting the shock absorber, the air valve inflates or deflates the air chamber, thereby changing the air pressure of the air chamber, and cooperating with the extrusion plate to squeeze the first shock-absorbing spring to change the length of the first shock-absorbing spring, so as to adjust the distance of the roof rack from the ground and change the soft and hard characteristics of riding to a certain extent. At the same time, the second shock-absorbing spring further enhances the shock-absorbing effect of the vehicle body and improves the comfort.

[0021] By setting up a bracket mechanism, the handle drives the screw rod to rotate, thereby driving the buffer plate to push the two clamping plates to move toward each other, so that the two clamping columns pass through the installation groove, and the hanging ears at both ends of the shock absorber are fixed, so as to provide stable support for the shock absorber. At the same time, the shock absorber can be easily disassembled and installed, thereby improving the applicability of the shock absorber. A buffer frame and a buffer air cushion are set to buffer the vibration of the shock absorber, reduce the vibration of the shock absorber in the horizontal direction, and improve the shock absorbing effect of the shock absorber. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0023] Figure 1 It is a structural schematic diagram of an automobile suspension shock absorber bracket assembly of the present invention;

[0024] Figure 2 It is a partial structural schematic diagram of the suspension mechanism of the present invention;

[0025] Figure 3 It is a structural schematic diagram of the universal assembly of the present invention;

[0026] Figure 4It is a schematic diagram of the internal structure of the buffer seat of the present invention;

[0027] Figure 5 The present invention Figure 4 The enlarged view of point A in the middle;

[0028] Figure 6 It is a schematic structural diagram of the shock absorber of the present invention;

[0029] Figure 7 It is a schematic diagram of the internal structure of the shock-absorbing seat of the present invention;

[0030] Figure 8 is a top view of the support mechanism of the present invention;

[0031] Fig. 9 The present invention Figure 8 Enlarged view of point B in the middle.

[0032] In the figure: 1, chassis; 2, roof frame; 3, suspension mechanism; 4, shock absorber; 5, bracket mechanism; 101, brake disc; 301, buffer seat; 302, first connecting rod; 303, second connecting rod; 304, first universal joint; 305, second universal joint; 306, universal assembly; 307, slide plate; 308, telescopic rod; 309, first buffer spring; 310, limit plate; 311, hinge rod; 312, buffer groove; 313, fixed seat; 314, buffer rod; 315, second buffer spring; 316, movable block; 3 17. The third buffer spring; 3061. The cross; 3062. The universal ball; 3063. The universal sleeve; 401. The shock-absorbing seat; 402. The shock-absorbing rod; 403. The extrusion plate; 404. The air chamber; 405. The air valve; 406. The first shock-absorbing spring; 407. The hanging ear; 408. The mounting groove; 409. The second shock-absorbing spring; 501. The first support frame; 502. The clamping plate; 503. The clamping column; 504. The buffer frame; 505. The buffer plate; 506. The buffer air cushion; 507. The second support frame; 508. The screw rod; 509. The handle. DETAILED DESCRIPTION

[0033] 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.

[0034] See also Figure 1 - Fig. 9 , the present invention provides a technical solution:

[0035] A vehicle suspension shock absorber bracket assembly comprises a vehicle bottom frame 1 and a roof frame 2 located above the vehicle bottom frame 1. Brake discs 101 are fixed to both ends of the vehicle bottom frame 1. The outer side of the brake discs 101 is used to install a wheel hub. A suspension mechanism 3 is provided between the inner sides of the two brake discs 101 and the bottom of the roof frame 2. Shock absorbers 4 are provided between the inner sides of the two brake discs 101 and the two ends of the roof frame 2. Bracket mechanisms 5 are provided at both ends of the shock absorber 4. The suspension mechanism 3 can be elastically arranged between the brake discs 101 and the roof frame 2, thereby greatly reducing the impact on the vehicle body and improving the ground adhesion of the wheels. At the same time, the left and right wheels can be made to bounce independently without interfering with each other, thereby reducing the inclination and vibration of the vehicle body. The two ends of the shock absorber 4 can be fixed between the brake discs 101 and the ends of the roof frame 2 through the bracket mechanism 5, thereby stably supporting the shock absorber 4. At the same time, the shock absorber 4 can be easily disassembled and installed, thereby improving the applicability of the shock absorber 4.

[0036] See also Figure 2 - Figure 5 The suspension mechanism 3 includes a buffer seat 301, both ends of the buffer seat 301 are penetrated by a first connecting rod 302, a second connecting rod 303 is provided on the side of the first connecting rod 302 away from the buffer seat 301, a first universal joint 304 and a second universal joint 305 are fixed respectively at the ends of the first connecting rod 302 and the second connecting rod 303 close to each other, a universal joint assembly 306 is provided between the first universal joint 304 and the second universal joint 305, and two symmetrically distributed slides 307 are slidably connected to the bottom of the roof frame 2, one end of one of the second connecting rods 303 is fixed to the inner side of the brake disc 101, and a telescopic rod 308 is hinged between one end of the other second connecting rod 303 and the slide 307, wherein a first buffer spring 309 is fixed between the top of the buffer seat 301 and the roof frame 2.

[0037] The universal assembly 306 includes a cross 3061, and universal balls 3062 are fixed to the four ends of the cross 3061 respectively. The outer surface of the universal ball 3062 is sleeved with a universal sleeve 3063. The universal ball 3062 can rotate inside the universal sleeve 3063. The four universal sleeves 3063 are fixed to the inside of the first universal joint 304 and the second universal joint 305 respectively.

[0038] One end of the first connecting rod 302 is located inside the buffer seat 301 and is fixed with a limiting plate 310. The internal top and bottom ends of the buffer seat 301 are slidably connected to two sliding seats. One side of the limiting plate 310 is hingedly connected to the two sliding seats with a hinged rod 311. A buffer groove 312 is penetrated through the surface of the hinged rod 311. The internal top and bottom ends of the buffer seat 301 are fixed with a fixed seat 313. A buffer rod 314 is penetrated and slidably connected in the fixed seat 313. A second buffer spring 315 is fixed between one end of the buffer rod 314 and the internal end wall of the fixed seat 313. A movable block 316 is fixed to the other end of the buffer rod 314. The movable block 316 is movably connected to the buffer groove 312. A third buffer spring 317 is fixed between the two limiting plates 310. By setting the suspension mechanism 3, the first buffer spring 309 and the telescopic rod 308 can achieve a buffering effect between the brake disc 101 and the roof frame 2, which greatly reduces the impact on the vehicle body and improves the ground adhesion of the wheels. The first universal joint 304 and the second universal joint 305 cooperate with the universal assembly 306 to achieve a variety of movement forms of the brake disc 101 and the roof frame 2 to adapt to transmission between different angles. The two first connecting rods 302 cooperate with the second buffer spring 315 and the third buffer spring 317 to adjust the length of the suspension mechanism 3 and further achieve a buffering effect. The two suspension mechanisms 3 are set at the same time, so that the left and right wheels can jump separately and independently of each other, thereby greatly reducing the inclination and vibration of the vehicle body.

[0039] See also Figure 6 - Figure 7 The shock absorber 4 includes a shock absorber seat 401, a shock absorber rod 402 is penetrated through and slidably connected to the bottom of the shock absorber seat 401, an extrusion plate 403 is fixed to the top of the shock absorber rod 402, an air chamber 404 is provided on the top of the extrusion plate 403, an air valve 405 is provided at one end of the shock absorber seat 401, the air valve 405 is communicated with the inside of the air chamber 404, a first shock absorber spring 406 is sleeved on the outer surface of the shock absorber rod 402, and the two ends of the first shock absorber spring 406 are respectively fixed to the extrusion plate 403 and the shock absorber seat 401, a hanging ear 407 is fixed to the bottom end of the shock absorber rod 402 and the top of the shock absorber seat 401, and an installation groove 408 is penetrated on the hanging ear 407, and a second shock absorber spring 409 is sleeved on the outer surface of the shock absorber seat 401, and the two ends of the second shock absorber spring 409 are respectively fixed to the shock absorber seat 401 and the shock absorber rod 402. By setting the shock absorber 4, the air valve 405 inflates or deflates the air chamber 404, thereby changing the air pressure of the air chamber 404, and cooperating with the extrusion plate 403 to extrude the first shock absorbing spring 406, changing the length of the first shock absorbing spring 406, so as to adjust the distance of the roof frame 2 from the ground and change the soft and hard characteristics of riding to a certain extent. At the same time, the second shock absorbing spring 409 further enhances the shock absorbing effect of the vehicle body and improves the comfort.

[0040] See also Figure 8 - Fig. 9 The bracket mechanism 5 includes a first support frame 501, the top and bottom of the first support frame 501 are both provided with openings, and the first support frame 501 is slidably connected with clamping plates 502 on both sides thereof, and the two clamping plates 502 are both fixed with clamping columns 503 adapted to the mounting groove 408 on the sides close to each other, one of the clamping columns 503 is fixed with a clamping block, and the other clamping column 503 is provided with a clamping groove, and the two clamping plates 502 are both fixed with a buffer frame 504 on the sides away from each other, and the buffer frame 50 A buffer plate 505 is slidably connected to the inner side of the first support frame 501, a buffer air cushion 506 is fixed between one end of the buffer plate 505 and the buffer frame 504, the other end of the buffer plate 505 passes through the first support frame 501 and is slidably connected to the first support frame 501, and second support frames 507 are fixed to both ends of the outer side of the first support frame 501, a screw rod 508 passes through the second support frame 507 and is threadedly connected, one end of the screw rod 508 is rotatably connected to the buffer plate 505, and a handle 509 is fixed to the other end of the screw rod 508. By setting up the bracket mechanism 5, the handle 509 drives the screw rod 508 to rotate, thereby driving the buffer plate 505 to push the two clamping plates 502 to move toward each other, so that the two clamping columns 503 pass through the installation groove 408, and fix the ears 407 at both ends of the shock absorber 4, so as to stably support the shock absorber 4. At the same time, the shock absorber 4 can be easily disassembled and installed, thereby improving the applicability of the shock absorber 4. The buffer frame 504 and the buffer air cushion 506 are set, so that the vibration of the shock absorber 4 is buffered, the vibration of the shock absorber 4 in the horizontal direction is reduced, and the shock absorbing effect of the shock absorber 4 is improved.

[0041] Working principle:

[0042] When the present invention is in use, the suspension mechanisms 3 arranged on both sides enable the first buffer spring 309 and the telescopic rod 308 to achieve a buffering effect between the brake disc 101 and the roof frame 2, thereby greatly reducing the impact on the vehicle body and improving the ground adhesion of the wheels. The first universal joint 304 and the second universal joint 305 cooperate with the universal assembly 306 to achieve a variety of movement forms of the brake disc 101 and the roof frame 2 to adapt to transmission between different angles. The two first connecting rods 302 cooperate with the second buffer spring 315 and the third buffer spring 317 to adjust the length of the suspension mechanism 3 and further achieve a buffering effect. The two suspension mechanisms 3 are arranged at the same time, so that the left and right wheels can jump separately and independently of each other, thereby greatly reducing the tilt and vibration of the vehicle body.

[0043] By setting the shock absorber 4, the air valve 405 inflates or deflates the air chamber 404, thereby changing the air pressure of the air chamber 404, and cooperating with the extrusion plate 403 to squeeze the first shock absorbing spring 406, changing the length of the first shock absorbing spring 406, so as to adjust the distance of the roof frame 2 from the ground and change the soft and hard characteristics of riding to a certain extent, and at the same time, the second shock absorbing spring 409 further enhances the shock absorption effect of the vehicle body and improves the comfort;

[0044] By setting up the bracket mechanism 5, the handle 509 drives the screw rod 508 to rotate, thereby driving the buffer plate 505 to push the two clamping plates 502 to move toward each other, so that the two clamping columns 503 pass through the installation groove 408, and fix the ears 407 at both ends of the shock absorber 4, so as to stably support the shock absorber 4. At the same time, the shock absorber 4 can be easily disassembled and installed, thereby improving the applicability of the shock absorber 4. The buffer frame 504 and the buffer air cushion 506 are set, so that the vibration of the shock absorber 4 is buffered, the vibration of the shock absorber 4 in the horizontal direction is reduced, and the shock absorbing effect of the shock absorber 4 is improved.

[0045] The above is a detailed description of an embodiment of the present invention, but the content is only a preferred embodiment of the present invention and cannot be considered to limit the scope of implementation of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of the patent coverage of the present invention.

Claims

1. A vehicle suspension shock absorber bracket assembly, comprising a vehicle bottom frame (1), and a vehicle roof frame (2) located above the vehicle bottom frame (1), brake discs (101) being fixed at both ends of the vehicle bottom frame (1), and a suspension mechanism (3) being provided between the inner sides of the two brake discs (101) and the bottom of the vehicle roof frame (2), characterized in that: The suspension mechanism (3) comprises a buffer seat (301), a first connecting rod (302) is provided through both ends of the buffer seat (301), a second connecting rod (303) is provided on the side of the first connecting rod (302) away from the buffer seat (301), a first universal joint (304) and a second universal joint (305) are respectively fixed to the ends of the first connecting rod (302) and the second connecting rod (303) close to each other, a universal joint assembly (306) is provided between the first universal joint (304) and the second universal joint (305), and two brake discs A shock absorber (4) is provided between the inner side (101) and the two ends of the roof frame (2), the shock absorber (4) comprising a shock absorber seat (401), a shock absorber rod (402) passing through the bottom of the shock absorber seat (401) and slidably connected thereto, an extrusion plate (403) is fixed to the top of the shock absorber rod (402), an air chamber (404) is provided at the top of the extrusion plate (403), an air valve (405) is provided at one end of the shock absorber seat (401), the air valve (405) is communicated with the inside of the air chamber (404), and bracket mechanisms (5) are provided at both ends of the shock absorber (4); The bottom of the roof frame (2) is slidably connected to two symmetrically distributed slide plates (307), one end of one second connecting rod (303) is fixed to the inner side of the brake disc (101), and a telescopic rod (308) is hingedly connected between one end of the other second connecting rod (303) and the slide plate (307), wherein a first buffer spring (309) is fixed between the top of the buffer seat (301) and the roof frame (2); One end of the first connecting rod (302) is located inside the buffer seat (301) and fixed with a limiting plate (310); the top and bottom ends of the buffer seat (301) are slidably connected to two sliding seats; one side of the limiting plate (310) is hingedly connected to the two sliding seats with a hinge rod (311); and a third buffer spring (317) is fixed between the two limiting plates (310); A buffer groove (312) is formed through the surface of the hinge rod (311); a fixing seat (313) is fixed to the top and bottom of the buffer seat (301); a buffer rod (314) is passed through and slidably connected to the fixing seat (313); a second buffer spring (315) is fixed between one end of the buffer rod (314) and an inner end wall of the fixing seat (313); a movable block (316) is fixed to the other end of the buffer rod (314); and the movable block (316) is movably connected to the buffer groove (312).

2. The automobile suspension shock absorber bracket assembly according to claim 1, characterized in that: The universal assembly (306) comprises a cross (3061), the four ends of the cross (3061) are respectively fixed with universal balls (3062), the outer surface of the universal ball (3062) is sleeved with a universal sleeve (3063), the universal ball (3062) can rotate inside the universal sleeve (3063), and the four universal sleeves (3063) are respectively fixed to the inner sides of the first universal joint (304) and the second universal joint (305).

3. The automobile suspension shock absorber bracket assembly according to claim 1, characterized in that: The outer surface of the shock absorbing rod (402) is sleeved with a first shock absorbing spring (406), and the two ends of the first shock absorbing spring (406) are respectively fixed to the extrusion plate (403) and the shock absorbing seat (401), and the bottom end of the shock absorbing rod (402) and the top of the shock absorbing seat (401) are both fixed with a hanging ear (407), and the hanging ear (407) is penetrated by a mounting groove (408), and the outer surface of the shock absorbing seat (401) is sleeved with a second shock absorbing spring (409), and the two ends of the second shock absorbing spring (409) are respectively fixed to the shock absorbing seat (401) and the shock absorbing rod (402).

4. The automobile suspension shock absorber bracket assembly according to claim 1, characterized in that: The support mechanism (5) comprises a first support frame (501), the top and bottom of the first support frame (501) are both provided with openings, and clamping plates (502) are slidably connected to both sides of the first support frame (501), and clamping columns (503) adapted to the mounting groove (408) are fixed on the sides of the two clamping plates (502) close to each other, wherein a clamping block is fixed on one of the clamping columns (503), and a clamping groove is provided on the other clamping column (503).

5. The automobile suspension shock absorber bracket assembly according to claim 4, characterized in that: A buffer frame (504) is fixed to the side of the two clamping plates (502) away from each other, a buffer plate (505) is slidably connected inside the buffer frame (504), a buffer air cushion (506) is fixed between one end of the buffer plate (505) and the buffer frame (504), the other end of the buffer plate (505) passes through the first support frame (501) and is slidably connected to the first support frame (501), and a second support frame (507) is fixed to both ends of the outside of the first support frame (501), a screw rod (508) passes through the second support frame (507) and is threadedly connected, one end of the screw rod (508) is rotatably connected to the buffer plate (505), and the other end of the screw rod (508) is fixed to a handle (509).

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