A hook-shaped pressing plate linkage self-locking clamping mechanism for automobile shock absorber

Abstract

This invention provides a self-locking clamping mechanism for a car shock absorber with hook-shaped pressure plates, comprising a positioning base, fixed seats, hook-shaped pressure plates, and grippers. Two fixed seats are symmetrically installed in the cavity in the middle of the positioning base. Two hook-shaped pressure plates are symmetrically positioned between the two fixed seats. Two grippers are adjustablely and symmetrically fixed to the tops of their respective hook-shaped pressure plates. Counterweights are fixed to the outer sides of the two grippers. When the bottom fitting component of the car shock absorber is placed into the limiting groove of the fixed seat, the shock absorber pushes the hook-shaped pressure plates between the two fixed seats to move, causing the two hook-shaped pressure plates to pivot towards each other along the fixed portion of the fixed seat, and driving the two grippers located at the top of the hook-shaped pressure plates to clamp the body of the car shock absorber. When the car shock absorber is removed upwards, the counterweights located on the outer sides of the grippers, under the action of gravity, drive the two hook-shaped pressure plates to move in opposite directions through the two grippers, thus unlocking the self-locking clamping mechanism.

Description

Technical Field

[0001] This invention relates to a self-locking clamping device, and more particularly to a hook-type pressure plate linkage self-locking clamping mechanism for automobile shock absorbers. Background Technology

[0002] Currently, there are many styles and structures of front and rear clamping mechanisms on the market, but devices that add a self-locking function to the clamping structure are rare. The common practice is to use a self-locking cylinder instead of a regular cylinder to give the device a self-locking function. However, self-locking cylinders are expensive, have poor stability, and are difficult to maintain, which brings many inconveniences to the use of self-locking clamping mechanisms. Some self-locking mechanisms use complex mechanical structures to give the device a self-locking function, but this results in even worse stability, more difficult maintenance, and higher risks. For complex working environments with safety risks, integrating front and rear clamping functions and self-locking functions into a single device would undoubtedly be a significant improvement in terms of cost savings, risk reduction, and better space utilization.

[0003] Therefore, it is necessary to design a clamping mechanism that, during the tooling positioning and clamping process, ensures stable and reliable positioning of the workpiece after clamping without altering its existing appearance, and prevents vibration during machining. Simultaneously, this self-locking clamping mechanism should also be easy to disassemble and maintain, have few easily damaged parts, and be readily replaceable. Summary of the Invention

[0004] In view of the shortcomings of the prior art described above, the purpose of this invention is to provide a hook-type pressure plate linkage self-locking clamping mechanism for automobile shock absorbers, which solves the problems of the clamping process being too cumbersome, the clamping device being unable to automatically reset, and the product processing space being limited in the prior art.

[0005] To achieve the above and other related objectives, the present invention provides a hook-type pressure plate linkage self-locking clamping mechanism for automotive shock absorbers, comprising:

[0006] A positioning base, wherein the positioning base has a cavity in the middle;

[0007] Two fixing seats are symmetrically installed in the cavity, and each fixing seat has a limiting groove on its upper part;

[0008] Hook-shaped pressure plates, two hook-shaped pressure plates are arranged symmetrically opposite each other, each hook-shaped pressure plate is disposed between two fixed seats and is respectively connected to the two fixed seats;

[0009] The two grippers are adjustable and symmetrically fixed to the top of the corresponding hook-shaped pressure plate, and counterweights are fixed to the outer sides of the two grippers respectively.

[0010] When the bottom fitting component of the car shock absorber is placed into the limiting groove of the fixed seat, the car shock absorber pushes the hook-shaped pressure plate between the two fixed seats to move. The pivot part of the hook-shaped pressure plate is fixedly connected to the fixed part of the fixed seat, so that the two hook-shaped pressure plates pivot towards each other along the fixed part of the fixed seat and drive the two claws provided at the top of the hook-shaped pressure plate to clamp the body of the car shock absorber.

[0011] When the car shock absorber is removed upwards, the counterweight block located on the outside of the gripper moves in opposite directions through the two grippers under the action of gravity, thereby unlocking the self-locking clamping mechanism.

[0012] In one embodiment of the present invention, the hook-shaped pressure plate includes a pressure plate body, a pressing portion located at the top of the pressure plate body, and a first arm and a second arm extending from both sides of the pressure plate body in a direction away from the pressing portion, respectively. The first arm and the second arm are respectively provided with pivot portions on their opposite outer sides, and the ends of the first arm and the second arm are respectively provided with hook-shaped structures.

[0013] In one embodiment of the present invention, the first arm and the second arm are arranged in parallel and symmetrically, and the pressing parts of the two hook-shaped pressure plates are respectively fixedly connected to the corresponding grippers.

[0014] In one embodiment of the present invention, the fixing base includes a fixing base body, a first leg and a second leg extending in the same direction from both sides of the fixing base body, and a limiting groove defined by the fixing base body, the first leg, and the second leg. The limiting groove is semi-circular at one end near the fixing base body and extends to the free ends of the first leg and the second leg at the other end away from the fixing base body, and is open. The first leg is provided with a first limiting groove at one end near the fixing base body, and the second leg is provided with a second limiting groove at one end near the fixing base body. The first limiting groove and the second limiting groove are respectively connected to the limiting groove. The free ends of the first leg and the second leg away from the fixing base body are provided with fixing portions.

[0015] In one embodiment of the present invention, the limiting groove is symmetrically arranged relative to the center line of the fixing seat, and its shape matches the curvature of the bottom circular component of the automobile shock absorber.

[0016] In one embodiment of the present invention, the first limiting slide groove and the second limiting slide groove are symmetrically arranged with respect to the center line of the fixed seat and penetrate through the first leg and the second leg. The width of the first limiting slide groove and the second limiting slide groove is greater than or equal to the width of the hook structure of the hook-shaped pressure plate, and the curvature of the first limiting slide groove and the second limiting slide groove matches the curvature of the hook structure.

[0017] In one embodiment of the present invention, each pivot portion of the hook-shaped pressure plate is a pivot shaft, which is respectively engaged in the corresponding pivot hole on the fixing portion of the fixing seat, so that each pivot portion of the hook-shaped pressure plate pivots in the pivot hole of the fixing seat; the hook-shaped structure of the hook-shaped pressure plate extends into the corresponding first limiting slide groove and second limiting slide groove on the fixing seat, and the pivoting of each pivot portion of the hook-shaped pressure plate in the pivot hole of the fixing seat causes the hook-shaped structure of the hook-shaped pressure plate to slide in the corresponding first limiting slide groove and second limiting slide groove of the fixing seat.

[0018] In one embodiment of the present invention, the gripper includes an arc-shaped groove that matches the curvature of the automobile shock absorber body and two parallel and symmetrical mounting holes on both sides of the arc-shaped groove. The mounting holes of the gripper are fixedly connected to the positioning holes on the pressing part of the hook-shaped pressure plate by fasteners. The mounting holes are of the waist hole structure, so that the distance between the two grippers arranged opposite to each other can be adjusted by the fasteners in the waist hole structure.

[0019] In one embodiment of the present invention, the gripper has a fixing hole at the center of its outer side away from the arc-shaped groove, and the counterweight has a corresponding connecting hole. The counterweight and the gripper are fixedly connected by a connector. The counterweight also has a protrusion on the side near the gripper. When the counterweight and the gripper are assembled, the protrusion of the counterweight abuts against the top of the gripper and the counterweight and the gripper become a whole.

[0020] In one embodiment of the present invention, the positioning base is a hollow structure that extends through the top and bottom. The cavity is defined by the bottom wall and cylindrical side wall of the positioning base and communicates with the outside through the opening of the bottom wall. Two fixing seats are symmetrically disposed in the cavity and are respectively fixedly connected to the bottom wall of the positioning base.

[0021] As described above, the hook-type pressure plate linkage self-locking clamping mechanism for automobile shock absorbers of the present invention has the following beneficial effects:

[0022] This invention achieves precise positioning by riveting the fixed base and hook-shaped pressure plate together, allowing the hook-shaped pressure plate to pivot on the fixed base. Simultaneously, limit switches are designed at the hook-shaped structure of the pressure plate to ensure structural safety and reliability while maintaining flexibility. The grippers, fixedly connected to the hook-shaped pressure plate, are made of engineering plastic to protect the surface of the gripped product; furthermore, a fine-tuning mechanism is provided on the grippers, allowing for precise adjustment of the gripper spacing on the hook-shaped pressure plate. Attached Figure Description

[0023] Figure 1 This is an exploded perspective view of a hook-shaped pressure plate linkage self-locking clamping mechanism for an automobile shock absorber according to the present invention.

[0024] Figure 2 This is a schematic diagram illustrating the structure of the self-locking clamping mechanism in the clamping state of the present invention.

[0025] Figure 3 This is a schematic diagram illustrating the structure of the self-locking clamping mechanism of the present invention in the released state.

[0026] Figure 4 This is a three-dimensional schematic diagram of the hook-shaped pressure plate of the present invention.

[0027] Figure 5 This is a three-dimensional schematic diagram of the fixing base of the present invention.

[0028] Figure 6 This is a three-dimensional schematic diagram of the gripper of the present invention.

[0029] Figure 7 This is a three-dimensional schematic diagram of the counterweight block of the present invention.

[0030] Figure 8 This is a three-dimensional schematic diagram of the positioning base of the present invention.

[0031] Component designation explanation

[0032] Positioning base 1, cavity 11, base positioning hole 12, bottom wall 13, cylindrical side wall 14;

[0033] Fixed base 2, limiting groove 21, first limiting slide groove 221, second limiting slide groove 222, fixing part 23, pivot hole 231, fixed base body 24, first leg 251, second leg 252;

[0034] Hook-shaped pressure plate 3, pressure plate body 31, pivot part 32, pressing part 33, first arm 34, second arm 35, hook-shaped structure 36, positioning hole 37;

[0035] Clamping claw 4, arc-shaped groove 41, mounting hole 42, fixing hole 43;

[0036] Counterweight 5, connecting hole 51, protrusion 52, connector 53 (not labeled);

[0037] 6. Automotive shock absorber body and bottom mating component 61. Detailed Implementation

[0038] The following specific examples illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that, unless otherwise specified, the following embodiments and features can be combined with each other. It should also be understood that the terminology used in the embodiments of the present invention is for describing specific implementation schemes and not for limiting the scope of protection of the present invention. Test methods in the following embodiments that do not specify specific conditions are generally performed under conventional conditions or according to the conditions recommended by the respective manufacturers.

[0039] Please see Figures 1 to 8 It should be understood that the structures, proportions, sizes, etc., illustrated in the accompanying drawings are merely for illustrative purposes to aid those skilled in the art and to facilitate understanding. They are not intended to limit the scope of the invention and therefore have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, without affecting the effectiveness or purpose of the invention, should still fall within the scope of the technical content disclosed herein. Furthermore, the terms "upper," "lower," "left," "right," "middle," and "one" used in this specification are merely for clarity and not intended to limit the scope of the invention. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of the invention.

[0040] Please see Figure 1 This invention provides a hook-type pressure plate linkage self-locking clamping mechanism for automotive shock absorbers, comprising: a positioning base 1, fixed seats 2, hook-type pressure plates 3, and grippers 4. The positioning base 1 has a cavity 11 in the middle, and two fixed seats 2 are symmetrically installed in the cavity 11. Each fixed seat 2 has a limiting groove 21 on its upper part. The two hook-type pressure plates 3 are arranged symmetrically, each hook-type pressure plate 3 being located between and connected to the two fixed seats 2 respectively. Two grippers 4 are adjustablely and symmetrically fixed to the top of the corresponding hook-type pressure plates 3, and counterweights 5 are fixed to the opposite outer sides of the two grippers 4. Figure 2 and Figure 3When the bottom fitting component 61 of the car shock absorber is placed into the limiting groove 21 of the fixed seat 2, the car shock absorber pushes the hook-shaped pressure plate 3 between the two fixed seats 2 to move. The pivot part 32 of the hook-shaped pressure plate 3 is fixedly connected to the fixed part 23 of the fixed seat 2, so that the two hook-shaped pressure plates 3 pivot towards each other along the fixed part 23 of the fixed seat 2, and drive the two claws 4 located at the top of the hook-shaped pressure plate 3 to clamp the car shock absorber body 6. When the car shock absorber is taken out upward, the counterweight 5 located on the outside of the claws 4, under the action of gravity, drives the two hook-shaped pressure plates 3 to move in opposite directions through the two claws 4, so that the self-locking clamping mechanism is unlocked.

[0041] Combination Figure 1 , Figure 4 and Figure 5The hook-shaped pressure plate 3 includes a pressure plate body 31, a clamping part 33 located at the top of the pressure plate body 31, and a first arm 34 and a second arm 35 extending from both sides of the pressure plate body 31 in a direction away from the clamping part 33. Pivoting parts 32 are respectively provided on the opposite outer sides of the first arm 34 and the second arm 35, and hook-shaped structures 36 are respectively provided at the ends of the first arm 34 and the second arm 35. The first arm 34 and the second arm 35 of the hook-shaped pressure plate 3 are arranged parallel and symmetrically. The clamping parts 33 of the two hook-shaped pressure plates 3 are respectively fixedly connected to corresponding grippers 4. The hook-shaped pressure plate 3 is made of Cr12 alloy tool steel, which has good hardenability and good wear resistance. Its pivoting part 32 is a circular through hole, which is fixedly connected by fasteners or rivets. The fixing base 2 includes a fixing base body 24, a first leg 251 and a second leg 252 extending from both sides of the fixing base body 24 in the same direction, and a limiting groove 21 defined by the fixing base body 24, the first leg 251 and the second leg 252. The limiting groove 21 is semi-circular at one end near the fixing base body 24 and extends to the free ends of the first leg 251 and the second leg 252 at the other end, and is open. The first leg 251 is provided with a first limiting groove 221 at one end near the fixing base body 24, and the second leg 252 is provided with a second limiting groove 222 at one end near the fixing base body 24. The first limiting groove 221 and the second limiting groove 222 are respectively connected to the limiting groove 21. The free ends of the first leg 251 and the second leg 252 away from the fixing base body 24 are provided with fixing parts 23. The limiting groove 21 in the middle of the fixed seat 2 is symmetrically arranged relative to the center line of the fixed seat 2, and its shape matches the curvature of the bottom mating component 61 of the car shock absorber. The fixed seat 2 is made of Cr12 alloy with a quenching hardness of HRC46-52 and is nickel-plated. The first limiting groove 221 and the second limiting groove 222 are symmetrically arranged relative to the center line of the fixed seat 2 and pass through the first leg 251 and the second leg 252. The width of the first limiting groove 221 and the second limiting groove 222 is greater than or equal to the width of the hook structure 36 of the hook-shaped pressure plate 3, and the curvature of the first limiting groove 221 and the second limiting groove 222 matches that of the hook structure 36. The hook structure 36 has a certain curvature, and its width is less than the width of the first limiting groove 221 and the second limiting groove 222 on the fixed seat 2. The two fixed seats 2 are symmetrically arranged on the positioning base 1 and fixedly connected, so as to place the car shock absorber more stably.Each pivot portion 32 of the hook-shaped pressure plate 3 serves as a pivot shaft, and they are respectively engaged in the corresponding pivot holes 231 on the fixing portion 23 of the fixing seat 2, allowing each pivot portion 32 of the hook-shaped pressure plate 3 to pivot within the pivot holes 231 of the fixing seat 2. The hook-shaped structure 36 of the hook-shaped pressure plate 3 extends into the corresponding first limiting groove 221 and second limiting groove 222 on the fixing seat 2. The pivoting of each pivot portion 32 of the hook-shaped pressure plate 3 within the pivot holes 231 of the fixing seat 2 causes the pressure plate body 31 of the hook-shaped pressure plate 3 to slide within the corresponding first limiting groove 221 and second limiting groove 222 of the fixing seat 2. A pin passes through the pivot holes 231 on the fixing seat 2 and connects to each pivot portion 32 of the hook-shaped pressure plate 3, allowing the hook-shaped pressure plate 3 to pivot around the fixing seat 2.

[0042] Combination Figure 1 , Figure 6 and Figure 7 The gripper 4 includes an arc-shaped groove 41 that matches the curvature of the car shock absorber body 6, and two parallel and symmetrical mounting holes 42 on both sides of the arc-shaped groove 41. The mounting holes 42 of the gripper 4 are fixedly connected to the positioning holes 37 on the clamping part 33 of the hook-shaped pressure plate 3 by fasteners. The mounting holes 42 are of a waist-hole structure, which allows the spacing between the two relatively arranged grippers 4 to be adjusted by fasteners within the waist-hole structure. The gripper 4 adopts a micro-adjustment mechanism waist-hole structure and is fixed by bolts, which is convenient for accommodating various arc-shaped devices. It also facilitates the adjustment of insufficient clamping force caused by installation and debugging errors and machining errors, as well as the problem of workpiece shaking after clamping, all of which can be addressed by the micro-adjustment mechanism (waist-hole) during later production processes. A fixing hole 43 is provided in the middle of the outer side of the gripper 4 away from the arc-shaped groove 41, and a corresponding connecting hole 51 is provided for the counterweight 5. The counterweight 5 is fixedly connected to the gripper 4 through the connector 53. The counterweight 5 also has a protrusion 52 on the side near the gripper 4. When the counterweight 5 and the gripper 4 are assembled, the protrusion 52 of the counterweight 5 abuts against the top of the gripper 4 and the counterweight 5 and the gripper 4 become a whole. The protrusion 52 of the counterweight 5 can be 3-5 mm high to achieve the limiting between the gripper 4 and the counterweight 5. The gripper is made of POM (polyoxymethylene), which is a strong and hard thermoplastic with good fatigue resistance and thermal stability. It has similar hardness, strength and rigidity to metal. It has good self-lubricating properties, good fatigue resistance and elasticity over a wide range of temperature and humidity. In addition, it has good chemical resistance, which can effectively protect the surface finish of the workpiece being gripped and prevent scratches.

[0043] Figure 8The positioning base 1 of this invention is a cavity 11 extending through the top and bottom. The cavity 11 is defined by the bottom wall 13 and cylindrical sidewall 14 of the positioning base 1, and communicates with the outside through an opening in the bottom wall 13. Two fixed seats 2 are symmetrically arranged within the cavity 11 and are respectively fixedly connected to the bottom wall 13 of the positioning base 1. Symmetrical waist holes 15 are also provided on the cylindrical sidewall 14 of the positioning base 1. These waist holes 15 are used to connect the tooling tray to the positioning base 1 via an interference fit with positioning pins, achieving precise positioning of the tooling tray and the positioning base 1. The fixed seats 2 are detachably installed within the positioning base 1 and can at least cover the fixed seats 2. The positioning base 1 not only facilitates the movement of the entire workpiece to be inspected but also facilitates the handling of tooling. Simultaneously, it allows for rapid and complete calibration with the base, thereby quickly completing the installation and debugging of the fixed tooling.

[0044] Combination Figure 2 and Figure 3 In a preferred embodiment of the present invention, a self-locking clamping mechanism is used for self-locking clamping of an automobile shock absorber. A robotic arm grasps the automobile shock absorber and vertically places it into the upper limit groove 21 of the fixed seat 2. After the bottom mating component 61 of the automobile shock absorber is placed into the upper limit groove 21 of the fixed seat 2, the automobile shock absorber pushes the hook-shaped pressure plate 3 between the two fixed seats 2 to move. The pivot part 32 of the hook-shaped pressure plate 3 is fixedly connected to the fixed part 23 of the fixed seat 2, so that the two hook-shaped pressure plates 3 pivot towards each other along the fixed part 23 of the fixed seat 2 and drive the two grippers 4 provided at the top of the hook-shaped pressure plate 3 to clamp the automobile shock absorber body 6. After the car shock absorber body 6 passes the helium detection test, the robotic arm grabs the car shock absorber body 6. The counterweight 5 located on the outside of the gripper 4, under the action of gravity, drives the two hook-shaped pressure plates 3 to move in opposite directions through the two grippers 4. Thus, the hook-shaped structure 36 of the hook-shaped pressure plate 3 loses the gravity of the car shock absorber body 6, and the counterweight 5 drives the gripper 4 to break the balance state of the self-locking clamping mechanism, so that the self-locking clamping mechanism is unlocked.

[0045] The hook-type pressure plate linkage self-locking clamping mechanism of the present invention includes a positioning base, a fixed base, a hook-type pressure plate, grippers, and a counterweight, and its structure is relatively simple. The fixed base, hook-type pressure plate, grippers, and counterweight are all housed within the positioning base. The fixed base is positioned to the positioning base via a positioning pin and fixedly connected by bolts, ensuring the consistency of the positioning accuracy of the automotive shock absorber and reducing errors generated during positioning. The hook-type pressure plate and the fixed base are also hinged with pins, allowing the hook-type pressure plate to pivot along the pivot hole of the fixed base. The pivoting part of the hook-type pressure plate has limit stops to ensure the pivoting limit of the hook-type pressure plate while also allowing for flexibility, making the device structurally simple and safe. The grippers are made of POM material to protect the product from impacts and scratches. The grippers have waist holes for fine-tuning and threaded holes on the outer side to fix the counterweight. Through the coordinated operation of the above components, the self-locking clamping mechanism has a simple structure and strong versatility. Products that can match the curvature of the grippers can achieve self-locking clamping.

[0046] In summary, this invention provides a hook-type pressure plate linkage self-locking clamping mechanism for automotive shock absorbers. A robotic arm grasps the shock absorber and vertically places it into a self-locking clamping fixture. When the arc surface of the shock absorber contacts the hook-type pressure plate on the fixed base, the shock absorber pushes the hook-type pressure plates on both sides of the fixture outwards simultaneously, thereby clamping the shock absorber with the grippers at the top of the hook-type pressure plates, achieving a self-locking clamping function. The grippers are designed with slotted holes for easy fine-tuning of the gripper spacing. When the product assembly is complete, the robotic arm removes the shock absorber upwards, and the counterweight of the clamping mechanism, under the action of gravity, drives the grippers and hook-type pressure plates to unlock. Therefore, this invention effectively overcomes the various shortcomings of the prior art and has high industrial application value.

[0047] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in the present invention should still be covered by the claims of the present invention.

Claims

1. A linkage self-locking clamping mechanism for a U-shaped pressing plate of an automobile shock absorber, characterized in that, include: Positioning base (1), wherein a cavity (11) is provided in the middle of the positioning base (1); The fixing base (2) is symmetrically installed in the cavity (11), and each fixing base (2) has a limiting groove (21) on its upper part; the fixing base (2) includes a fixing base body (24), a first leg (251) and a second leg (252) extending from both sides of the fixing base body (24) in the same direction, and the limiting groove (21) defined by the fixing base body (24) and the first leg (251) and the second leg (252), the limiting groove (21) being semi-circular at the end near the fixing base body (24) and away from the fixing base body (24). One end extends to the free end of the first leg (251) and the second leg (252) and is open. The first leg (251) is provided with a first limiting groove (221) near the fixed base body (24), and the second leg (252) is provided with a second limiting groove (222) near the fixed base body (24). The first limiting groove (221) and the second limiting groove (222) are respectively connected to the limiting groove (21). The free ends of the first leg (251) and the second leg (252) away from the fixed base body (24) are provided with fixing parts (23). Hook-shaped pressure plate (3), two hook-shaped pressure plates (3) are arranged symmetrically relative to each other, each hook-shaped pressure plate (3) is located between two fixed seats (2) and is respectively connected to the two fixed seats (2); the hook-shaped pressure plate (3) includes a pressure plate body (31), a pressing part (33) located at the top of the pressure plate body (31), and a first arm (34) and a second arm (35) extending from both sides of the pressure plate body (31) in a direction away from the pressing part (33), a pivot part (32) is provided on the opposite outer side of the first arm (34) and the second arm (35), and a hook-shaped structure (36) is provided at the end of the first arm (34) and the second arm (35). The first limiting slide groove (221) and the second limiting slide groove (222) are symmetrically arranged with respect to the center line of the fixed base (2) and pass through the first leg (251) and the second leg (252). The width of the first limiting slide groove (221) and the second limiting slide groove (222) is greater than or equal to the width of the hook structure (36), and the curvature of the first limiting slide groove (221) and the second limiting slide groove (222) matches the curvature of the hook structure (36). Each of the pivoting parts (32) of the hook-shaped pressure plate (3) is a pivoting shaft, and they are respectively engaged in the corresponding pivoting holes (231) on the fixing part (23) of the fixing seat (2), so that each of the pivoting parts (32) of the hook-shaped pressure plate (3) pivots in the pivoting holes (231) of the fixing seat (2); the hook-shaped structure (36) of the hook-shaped pressure plate (3) extends into the corresponding first limiting slide groove (221) and second limiting slide groove (222) on the fixing seat (2), and the pivoting of each of the pivoting parts (32) of the hook-shaped pressure plate (3) in the pivoting holes (231) of the fixing seat (2) causes the hook-shaped structure (36) of the hook-shaped pressure plate (3) to slide in the corresponding first limiting slide groove (221) and second limiting slide groove (222) of the fixing seat (2); The two grippers (4) are adjustable and symmetrically fixed to the top of the corresponding hook-shaped pressure plate (3), and counterweights (5) are fixed to the opposite outer sides of the two grippers (4). When the bottom fitting component (61) of the car shock absorber is placed into the limiting groove (21) of the fixed seat (2), the car shock absorber pushes the hook-shaped pressure plate (3) between the two fixed seats (2) to move. The pivot part (32) of the hook-shaped pressure plate (3) is fixedly connected to the fixed part (23) of the fixed seat (2), so that the two hook-shaped pressure plates (3) pivot towards each other along the fixed part (23) of the fixed seat (2) and drive the two claws (4) provided at the top of the hook-shaped pressure plate (3) to clamp the car shock absorber body (6). When the car shock absorber is removed upwards, the counterweight (5) located on the outside of the gripper (4) moves in opposite directions through the two grippers (4) under the action of gravity, thereby unlocking the self-locking clamping mechanism.

2. The self-locking clamping mechanism of claim 1, wherein: The first arm (34) and the second arm (35) are arranged in parallel and symmetrically, and the pressing part (33) of the two hook-shaped pressure plates (3) is fixedly connected to the corresponding claw (4).

3. The self-locking clamping mechanism of claim 2, wherein: The limiting groove (21) is symmetrically arranged relative to the center line of the fixed seat (2), and its shape matches the curvature of the bottom mating component (61) of the automobile shock absorber.

4. The self-locking clamping mechanism according to claim 3, characterized in that: The gripper (4) includes an arc-shaped groove (41) that matches the curvature of the car shock absorber body (6) and two parallel and symmetrical mounting holes (42) on both sides of the arc-shaped groove (41). The mounting holes (42) of the gripper (4) are fixedly connected to the positioning holes (37) on the pressing part (33) of the hook-shaped pressure plate (3) by fasteners. The mounting holes (42) are waist holes, so that the distance between the two grippers (4) arranged opposite to each other can be adjusted by fasteners in the waist hole structure.

5. The self-locking clamping mechanism according to claim 4, characterized in that: The gripper (4) has a fixing hole (43) in the middle of its outer side away from the arc groove (41), and the counterweight (5) has a corresponding connecting hole (51). The counterweight (5) is fixedly connected to the gripper (4) by the connector (53). The counterweight (5) also has a protrusion (52) on the side close to the gripper (4). When the counterweight (5) and the gripper (4) are assembled, the protrusion (52) of the counterweight (5) abuts against the top of the gripper (4) and the counterweight (5) and the gripper (4) become a whole.

6. The self-locking clamping mechanism according to claim 5, characterized in that: The positioning base (1) is a cavity (11) that runs through the top and bottom. The cavity (11) is defined by the bottom wall (13) and cylindrical side wall (14) of the positioning base (1) and communicates with the outside through the opening of the bottom wall (13). The two fixing seats (2) are symmetrically arranged in the cavity (11) and are fixedly connected to the bottom wall (13) of the positioning base (1) respectively.

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