CN217463025U - Shock absorber and automobile - Google Patents

Abstract

The application discloses a shock absorber and an automobile, which comprise an upper support, a lower support, a buffer spring, a piston cylinder, a piston rod and a buffer device; the buffer device comprises a first buffer part, a second buffer part and a third buffer part; the second buffer part is arranged in the first buffer part and is movably connected with the first buffer part, and the third buffer part is arranged in the second buffer part and is movably connected with the second buffer part; a first elastic piece is arranged on one side, facing the lower support, of the second buffer piece and abutted against the lower support, and the first elastic piece lifts the second buffer piece by a preset height relative to the first buffer piece in a natural state; the second elastic piece is arranged in the third buffer piece, and the third buffer piece is lifted by a preset height in the second buffer piece under the natural state by the second elastic piece, and the third buffer piece does not protrude out of the second buffer piece. This application is through above mode, when making the spring excessive compression of bumper shock absorber, forms multistage buffering, avoids the bumper shock absorber to damage.

Description

Shock absorber and automobile

Technical Field

The application relates to the technical field of automobile manufacturing, in particular to a shock absorber and an automobile.

Background

Shock absorbers are used widely in various types of motor vehicles such as automobiles and motorcycles as important means for improving the ride comfort of the motor vehicle and increasing the running stability and riding comfort.

The present shock absorber generally includes a pressure cylinder installed on the vehicle body, the pressure cylinder contains high viscosity damping oil and is provided with a piston, one end of the pressure cylinder penetrates a connecting rod, one end of the connecting rod is fixedly connected to the wheel frame of the wheel, the other end of the connecting rod is fixedly connected to the piston in the pressure cylinder, and the outside of the connecting rod is sleeved with a spring. When braking, the vehicle body can drive the piston through the connecting rod to compress the damping oil in the pressure cylinder, so as to obtain the buffer effect. Because the car only relies on the bumper shock absorber spring to cushion, when the automobile body received violent vibration suddenly, the bumper shock absorber took place the striking with the undersetting easily with the spring after, influences its life in the very big degree, leads to the shock attenuation to become invalid even.

How to form multi-level buffering when the spring of the shock absorber is excessively compressed due to the fact that violent vibration is continuously encountered by a motor vehicle, and damage to the shock absorber is avoided, and the problem which needs to be solved in the field is formed.

SUMMERY OF THE UTILITY MODEL

The application aims at providing a bumper shock absorber and car, can form multistage buffering when motor vehicle continuously runs into violent vibration and makes the spring of bumper shock absorber excessively compress, avoid the bumper shock absorber to damage.

The application discloses a shock absorber which comprises an upper support, a lower support, a buffer spring, a piston cylinder, a piston rod and a buffer device, wherein the upper support is fixedly connected with the lower support; the buffer device is arranged in the lower support, the piston cylinder is connected to the lower support, one end of the piston rod is connected with the upper support, the other end of the piston rod extends into the piston cylinder and is movably connected with the piston cylinder, the buffer spring is sleeved on the outer side of the piston cylinder and is not in contact with the piston cylinder, one end of the buffer spring is abutted against the upper support, and the other end of the buffer spring is abutted against the lower support; the buffer device comprises a first buffer part, a second buffer part and a third buffer part; the second buffer part is arranged in the first buffer part and is movably connected with the first buffer part, and the third buffer part is arranged in the second buffer part and is movably connected with the second buffer part; a first elastic piece is arranged on one side, facing the lower support, of the second buffer piece, and is abutted against the lower support, and the first elastic piece lifts the second buffer piece by a preset height relative to the first buffer piece in a natural state; and a second elastic element is arranged in the third buffer element, and the second elastic element is used for lifting the third buffer element by a preset height in the second buffer element in a natural state, and the third buffer element does not protrude out of the second buffer element.

Optionally, the first elastic element and the second elastic element are springs, the first buffer element, the second buffer element and the third buffer element are hollow cylinders with through holes in the axial direction, the height of the first buffer element is greater than that of the second buffer element, and the height of the second buffer element is greater than that of the third buffer element.

Optionally, a position of the lower support corresponding to the first buffer member is provided with a limiting groove, and the first buffer member is embedded into the limiting groove and connected with the lower support.

Optionally, the first buffer member is provided with a first convex edge, the first convex edge is arranged around the outer side wall of the first buffer member, the second buffer member is provided with a second convex edge, and the second convex edge is arranged around the outer side wall of the second buffer member; the width of the cross section of the first convex edge is larger than that of the cross section of the second convex edge.

Optionally, the cross-sectional shape of the first convex edge is a hexagon, and the thickness range of the first convex edge occupies between one quarter and one third of the height of the first buffer.

Optionally, the inner side wall of the lower support is provided with an internal thread, the outer side wall of one end, close to the lower support, of the piston cylinder is provided with an external thread, and the external thread is matched with the internal thread to fix the piston cylinder and the lower support in a threaded connection manner.

Optionally, the shock absorber further comprises an air bag device and an oil pipe, a first through hole is formed in the side wall of the lower support, one end of the oil pipe is connected with the air bag device, and the other end of the oil pipe is connected with the first through hole.

Optionally, the inner wall of the first through hole is provided with an internal thread, the outer side wall of one end, close to the first through hole, of the oil pipe is provided with an external thread, and the internal thread of the first through hole is matched with the external thread of the oil pipe to fix the oil pipe and the lower support in a threaded connection manner.

Optionally, the shock absorber further comprises a clamping piece and a clamp spring, and the clamping piece is sleeved on the piston rod and is movably connected with the piston rod; the clamp spring is arranged on the inner side wall close to the opening of the piston cylinder, and the clamping piece is matched and fixed with the clamp spring.

The application also discloses an automobile, which comprises a chassis and the shock absorber, wherein the shock absorber is connected with the chassis.

Compared with a shock absorber which only depends on a damping spring for buffering, the shock absorber is characterized in that a buffering device is arranged in a lower support, when the damping spring is in an over-compression state, the buffering device is used for further buffering, the buffering device comprises a first buffering part, a second buffering part and a third buffering part, the second buffering part is lifted by a preset height relative to the first buffering part under a natural state through a first elastic part, the third buffering part is lifted by a preset height in the second buffering part under the natural state through a second elastic part, so that when the damping spring is over-compressed, pressure borne by a piston rod of the shock absorber can be continuously transmitted to the second buffering part, the second buffering part forms first buffering, and when the second buffering part continuously bears pressure, the second buffering part can compress the second elastic part, when the second elastic part is completely compressed, the pressure of the piston rod can be transmitted to the third buffer piece, and the third buffer piece forms second buffering, so that multi-section buffering can be achieved in the limited space of the lower support, and when the motor vehicle continuously encounters severe vibration to enable the spring of the shock absorber to be excessively compressed, the shock absorber is prevented from being damaged.

Drawings

The accompanying drawings, which are included to provide a further understanding of the embodiments of the application, are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the principles of the application. It is obvious that the drawings in the following description are only some embodiments of the application, and that for a person skilled in the art, other drawings can be derived from them without inventive effort. In the drawings:

FIG. 1 is a schematic view of one embodiment of a shock absorber according to the present application;

FIG. 2 is a schematic view of a buffer apparatus according to an embodiment of the present application:

FIG. 3 is a schematic view of an embodiment of a lower support of the present application;

FIG. 4 is a schematic view of an embodiment of the present application showing the connection between the piston rod and the piston cylinder;

FIG. 5 is a block diagram of an embodiment of an automobile according to the present application.

10, a shock absorber; 100. an upper support; 200. a lower support; 210. a limiting groove; 220. a first through hole; 300. a buffer spring; 400. a piston cylinder; 500. a buffer device; 510. a first buffer member; 511. a first flange; 520. a second buffer member; 521. a first elastic member; 522. a spring; 523. a second flange; 530. a third buffer member; 531. a second elastic member; 600. a piston rod; 700. an airbag device; 800. an oil pipe; 810. a clamping piece; 820. a clamp spring; 830. an automobile; 840. a chassis.

Detailed Description

It is to be understood that the terminology, the specific structural and functional details disclosed herein are for the purpose of describing particular embodiments only, and are representative, but that the present application may be embodied in many alternate forms and should not be construed as limited to only the embodiments set forth herein.

In the description of the present application, the terms "first", "second" are used for descriptive purposes only and are not to be construed as indicating relative importance or as implicitly indicating the number of technical features indicated. Thus, unless otherwise specified, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature; "plurality" means two or more. The terms "comprises" and "comprising," and any variations thereof, are intended to cover a non-exclusive inclusion, such that one or more other features, integers, steps, operations, elements, components, and/or combinations thereof may be present or added.

Further, terms of orientation or positional relationship indicated by "center", "lateral", "upper", "lower", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, are described based on the orientation or relative positional relationship shown in the drawings, are simply for convenience of description of the present application, and do not indicate that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present application.

Furthermore, unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly and may include, for example, fixed connections, removable connections, and integral connections; can be mechanically or electrically connected; either directly or indirectly through intervening media, or through both elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

The present application is described in detail below with reference to the figures and alternative embodiments.

FIG. 1 is a schematic view of an embodiment of a shock absorber according to the present application, and FIG. 2 is a schematic view of an embodiment of a shock absorber according to the present application; as shown in fig. 1 and 2, the present application discloses a shock absorber 10, which includes an upper seat 100, a lower seat 200, a buffer spring 300, a piston cylinder 400, a piston rod 600, and a buffer device 500; the buffer device 500 is arranged in the lower support 200, the piston cylinder 400 is connected to the lower support 200, one end of the piston rod 600 is connected with the upper support 100, the other end of the piston rod extends into the piston cylinder 400 and is movably connected with the piston cylinder 400, the buffer spring 300 is sleeved outside the piston cylinder 400 and is not contacted with the piston cylinder 400, one end of the buffer spring 300 is abutted against the upper support 100, and the other end of the buffer spring is abutted against the lower support 200; the buffering device 500 includes a first buffering member 510, a second buffering member 520, and a third buffering member 530; the second buffer member 520 is disposed in the first buffer member 510 and movably connected to the first buffer member 510, and the third buffer member 530 is disposed in the second buffer member 520 and movably connected to the second buffer member 520; a first elastic element 521 is arranged on one side of the second buffer element 520 facing the lower support 200, the first elastic element 521 abuts against the lower support 200, and the first elastic element 521 lifts the second buffer element 520 by a preset height relative to the first buffer element 510 in a natural state; the second elastic element 531 is disposed in the third buffering element 530, and the second elastic element 531 naturally lifts the third buffering element 530 by a predetermined height in the second buffering element 520, and the third buffering element 530 does not protrude from the second buffering element 520.

Compared with the shock absorber 10 which only depends on the buffer spring 300 for buffering, the shock absorber 500 is arranged in the lower support 200, when the buffer spring 300 is in an over-compression state, the shock absorber 500 is further buffered by the buffer device 500, the shock absorber 500 of the present application is composed of three parts, namely a first buffer 510, a second buffer 520 and a third buffer 530, the second buffer 520 is lifted to a preset height relative to the first buffer 510 in a natural state through the first elastic element 521, the third buffer 530 is lifted to a preset height in the second buffer 520 through the second elastic element 531 in a natural state, so that when the buffer spring 300 is over-compressed, the pressure applied to the piston rod 600 of the shock absorber 10 is continuously transmitted to the second buffer 520, the second buffer 520 forms a first buffering, and when the second buffer 520 is continuously applied with the pressure, the second buffer 520 compresses the second elastic element 531, when the compression of the second elastic member 531 is completed, the pressure of the piston rod 600 is transmitted to the third buffering member 530, and the third buffering member 530 forms a second buffering, so that multi-stage buffering can be achieved in the limited space of the lower support 200, and when the spring 522 of the shock absorber 10 is excessively compressed due to continuous severe vibration of the motor vehicle, the shock absorber 10 is prevented from being damaged.

As shown in fig. 2, the first elastic element 521 and the second elastic element 531 are both springs 522, the first buffer 510, the second buffer 520 and the third buffer 530 are all hollow cylinders having through holes in the axial direction, the height of the first buffer 510 is greater than that of the second buffer 520, and the height of the second buffer 520 is greater than that of the third buffer 530.

The buffering device 500 of the present application is for better implementing multi-level buffering to protect the shock absorber 10 from being damaged when the buffering spring 300 of the shock absorber 10 is excessively compressed, so that the first buffering member 510, the second buffering member 520, and the third buffering member 530 are designed as hollow cylinders, and mutual friction among the first buffering member 510, the second buffering member 520, and the third buffering member 530 is reduced, so that the first buffering member 510, the second buffering member 520, and the third buffering member 530 are more easily moved relative to each other; then, the springs 522 are adopted for the first elastic member 521 and the second elastic member 531, and the special performance of the springs 522 enables the first elastic member 521, the second elastic member 531 and the third elastic member to have a certain buffering effect when the first elastic member 521, the second elastic member 531 and the third elastic member move relatively. In addition, in order to prevent the first, second, and third buffers 510, 520, and 530 from colliding with each other and the lower support 200 during the relative movement, the height of the first buffer 510 is set high, so that the second buffer 520 and the third buffer 530 can move relatively within the first buffer 510, and the third buffer 530 does not collide with the lower support 200 during the relative movement within the second buffer 520, and meanwhile, in the process of implementing multi-stage buffering, the second buffer 520 and the third buffer 530 can have enough movement space, so that the buffering effect is further enhanced, and the shock absorber 10 is prevented from being damaged when the buffering spring 300 is excessively compressed.

In the actual movement process of the vehicle body, the condition of the road surface is difficult to predict, when the vehicle body moves at high speed to pass through a large pit of the road surface, the vehicle body is suddenly shaken violently, at this time, the shock absorber 10 mounted on the vehicle body generates pressure, the buffer spring 300 on the shock absorber 10 is suddenly pressed, it is highly likely that over-compression occurs within a very short time, the piston rod 600 continues to hit the buffer device 500 of the lower support 200, since the damping device 500 is composed of three parts, the second damping member 520 is disposed inside the first damping member 510 and is naturally supported by the spring 522 with a predetermined height, and protrudes from the first buffer 510, the third buffer 530 is inside the second buffer 520, and is supported by the spring 522 at a predetermined height in a natural state inside the second cushion 520, the third buffer 530 is close to the plane where one end of the second buffer 520 close to the piston rod 600 is located; when the force is transmitted to the buffering device 500, the second buffering member 520 is firstly pressed to move towards the first buffering member 510, and meanwhile, the spring 522 arranged on the second buffering member 520 is compressed to form a first-stage buffering; after a certain degree of compression of the spring 522, the second cushion 520 does not move continuously, and the acting force can also be conducted continuously, at this time, the third cushion 530 can compress the spring 522 connected to the third cushion 530 to form a second-stage cushion, after the acting force is eliminated, the spring 522 connected to the third cushion 530 can play a role of resetting the third cushion 530, and the spring 522 on the second cushion 520 can also restore the second cushion 520 to an initial position. In addition, the lower support 200 is usually filled with oil, the oil is filled in the gap between the first buffer member 510, the second buffer member 520 and the third buffer member 530, and when the first buffer member 510, the second buffer member 520 and the third buffer member 530 move relatively, oil molecules are rubbed to form damping, so that the damping comfort is further improved, and the damping effect is enhanced.

In addition, buffer 500 in this application except that protection bumper shock absorber 10 avoids being damaged when violent the impact, can also avoid violent striking to the injury of human body to the buffering glue of elevator bottom to vehicle driver and crew's protection. Because the actual car body sometimes flies down a slope from a sand dune several meters high during the high-speed traveling, the shock absorption at the moment of landing is not enough to buffer and damage the limbs and internal organs of the person, and the buffer device 500 can reduce or avoid the injury of the person.

Fig. 3 is a schematic view of an embodiment of the lower support of the present application, as shown in fig. 3, a position of the lower support 200 corresponding to the first buffer 510 is provided with a limiting groove 210, and the first buffer 510 is embedded in the limiting groove 210 and connected to the lower support 200. Can set up the internal thread on the inside wall of spacing groove 210, can set up the external screw thread on the lateral wall of first bolster 510, cooperation through internal thread and external screw thread, fix first bolster 510 spiro union to the spacing groove 210 of undersetting 200, make first bolster 510 fixed more stable through spacing groove 210, when the buffer spring 300 of bumper shock absorber 10 excessively compresses, the effort that buffer 500 received can be conducted on spacing groove 210 through first bolster 510, make undersetting 200 share the effort through spacing groove 210, can effectually avoid the too big impact to buffer 500 that leads to of pressure, make buffer 500 be difficult to damage, the life of bumper shock absorber 10 has been prolonged. Of course, the limiting groove 210 and the first buffer 510 may be fixed by other methods, such as a snap connection, which is only illustrated by a threaded connection in the present application and is not limited to the connection between the limiting groove 210 and the first buffer 510 in the present embodiment.

In addition, as shown in fig. 2, the first buffer 510 is provided with a first convex edge 511, the first convex edge 511 is disposed around an outer side wall of the first buffer 510, the second buffer 520 is provided with a second convex edge 533, and the second convex edge 533 is disposed around an outer side wall of the second buffer 520; the width of the cross-section of the first convex edge 511 is greater than the width of the cross-section of the second convex edge 533. When the buffering spring 300 of the shock absorber 10 is over-compressed, the piston rod 600 is further compressed in the piston cylinder 400, and the pressure is transmitted to the second buffering member 520, at this time, the second buffering member 520 moves towards the first buffering member 510, and the first elastic member 521 is compressed during the movement of the second buffering member 520, so as to realize the first-stage buffering; in order to realize the transition from the first-stage buffering to the second-stage buffering and avoid the situation that the second buffering member 520 is trapped inside the first buffering member 510 due to continuous compression, and the third buffering member 530 inside the second buffering member 520 fails, a first convex edge 511 is provided on the first buffering member 510, the second convex edge 533 is disposed on the second cushion 520, such that when the second cushion 520 moves toward the first cushion 510 to compress the first elastic element 521, when the first resilient member 521 is compressed to a certain degree, the second convex edge 533 of the second buffer member 520 can abut against the first convex edge 511 of the first buffer member 510, so that the second convex edge 533 can be restricted from moving further, when the second buffering member 520 continues to be under the pressure, the third buffering member 530 located inside the second buffering member 520 can continue to compress the second elastic member 531, so as to achieve the second-stage buffering effect.

The cross-sectional shape of the first convex edge 511 is hexagonal, and the thickness of the first convex edge 511 occupies between one fourth and one third of the height of the first buffer member 510. Since the space of the lower support 200 is limited, in order to better install the first buffer member 510 into the lower support 200, the cross-sectional shape of the first convex edge 511 is configured to be hexagonal, so that when the first buffer member 510 is installed, the first convex edge 511 can be installed by holding the position with a hand or a tool, the friction force and the supporting surface of the first convex edge 511 with an installation tool are increased, and the first buffer member 510 is more easily installed into the lower support 200; meanwhile, when the second buffer member 520 is subjected to the pressure action from the piston rod 600, the first buffer member 510 is compressed, the second buffer member 520 moves towards the first buffer member 510, and finally the second convex edge 533 of the second buffer member 520 abuts against the first convex edge 511 of the first buffer member 510, so that the second buffer member 520 does not move any more; the thickness of the first convex edge 511 is one fourth to one third of the height of the first buffer member 510, so that the thickness of the first convex edge 511 can be ensured to play an effective protection and damage role in the limited height of the first buffer member 510, and the space of the first buffer member 510 can be saved.

Further, the inside wall of lower carriage 200 is provided with the internal thread, and the lateral wall that piston cylinder 400 is close to the one end of lower carriage 200 is provided with the external screw thread, and external screw thread and internal thread cooperation are fixed with piston cylinder 400 and lower carriage 200 spiro union. Through threaded connection, the piston cylinder 400 and the lower support 200 can be mounted and dismounted more conveniently, and the mounting and dismounting speed can be effectively improved. Of course, other types of connections between the lower support 200 and the piston cylinder 400 are possible, such as mechanical snap connections, and the present application is merely illustrative of threaded connections.

As shown in fig. 1, the shock absorber 10 further includes an air bag device 700 and an oil pipe 800, a first through hole 220 is provided on a side wall of the lower support 200, and one end of the oil pipe 800 is connected to the air bag device 700 and the other end is connected to the first through hole 220.

The air bag device 700 can be divided into two layers, oil and nitrogen are respectively filled in the two layers, in the actual use process, the oil and the nitrogen are filled in the air bag device 700, and then the air bag device 700 is connected to the first through hole 220, so that the air bag device 700 is connected to the first through hole 220 through the oil pipe 800 and is communicated with the lower support 200; then airbag device 700 injects fluid and nitrogen gas into lower support 200 respectively, form the air-fuel mixture body, fluid is through first bolster 510, second bolster 520, fill in the gap between third bolster 530, when buffer spring 300 excessively compresses, the effort reaches leads second bolster 520, through the relative movement between second bolster 520 and the first bolster 510, relative movement between third bolster 530 and the second bolster 520, come the friction fluid molecule and form the damping, with this having the buffering effect, form multistage buffering, avoid bumper 10 to damage, the absorbing comfort of automobile body has been promoted.

Further, the inner wall of the first through hole 220 is provided with an internal thread, the outer side wall of one end of the oil pipe 800 close to the first through hole 220 is provided with an external thread, and the internal thread of the first through hole 220 is matched with the external thread of the oil pipe 800 to fix the oil pipe 800 to the lower support 200 in a threaded manner. Through threaded fixation, make in the first through-hole 220 of installation that oil pipe 800 can be more convenient, the automobile body is at the vibrations in-process, and oil pipe 800 also is difficult to drop from lower carriage 200, has guaranteed oil pipe 800 and has provided the guarantee to the normal work of bumper shock absorber 10 to the normal input oil gas in the lower carriage 200.

Fig. 4 is a schematic view of a connection portion between the piston rod and the piston cylinder according to the present application, and as shown in fig. 4, the shock absorber 10 further includes a clamping member 810 and a clamp spring 820, the clamping member 810 is sleeved on the piston rod 600 and is movably connected with the piston rod 600; the clamp spring 820 is arranged on the inner side wall close to the opening of the piston cylinder 400, and the clamping piece 810 is matched and fixed with the clamp spring 820. When the shock absorber 10 is installed, one end of the piston rod 600 needs to be installed on the upper support 100, the end with the piston extends into the piston cylinder 400, and as an oil-gas mixture exists in the piston cylinder 400, in order to avoid leakage of the oil-gas mixture in the piston cylinder 400, the piston rod 600 is provided with the clamping piece 810, the shape of the clamping piece 810 is matched with that of the piston cylinder 400, and the clamping piece 810 can be plugged into the piston cylinder 400; after the clamping piece 810 is matched and fixed with the clamp spring 820 in the piston cylinder 400, sealing on the piston cylinder 400 is formed, so that an oil-gas mixture in the piston cylinder 400 can be effectively prevented from leaking, the piston rod 600 can normally compress the oil-liquid mixture, and the damping effect of the damper 10 is ensured; meanwhile, one end of the piston rod 600 subjected to compression movement can only move in the piston cylinder 400 and cannot fall out of the piston cylinder 400, and the damping quality of the damper 10 is further ensured.

Fig. 5 is a block diagram of an embodiment of the present application, and as shown in fig. 5, the present application further discloses an automobile 830, which includes a chassis, and the shock absorber 10, wherein the shock absorber 10 is connected to the chassis 840. The shock absorber 10 of the present application is mounted on the chassis 840 of the automobile 830, and can be used to suppress the shock and the impact from the road surface when the shock absorbing spring 300 rebounds after absorbing shock after the shock absorbing spring 300 is over compressed. The damping device can be widely used for automobiles and motorcycles to accelerate the attenuation of the vibration of the frame and the body so as to improve the driving smoothness of the motor vehicle and increase the driving stability and riding comfort. Moreover, by using the shock absorber 10 in the application, the comfort level of the shock absorber 10 to the shock absorption of the automobile can be greatly improved through multi-stage buffering, and the service life of the shock absorber 10 is prolonged.

It should be noted that the inventive concept of the present application can form many embodiments, but the present application has a limited space and cannot be listed one by one, so that, on the premise of no conflict, any combination between the above-described embodiments or technical features can form a new embodiment, and after the embodiments or technical features are combined, the original technical effect will be enhanced.

The foregoing is a more detailed description of the present application in connection with specific alternative embodiments, and the specific implementations of the present application are not to be considered limited to these descriptions. For those skilled in the art to which the present application pertains, several simple deductions or substitutions may be made without departing from the concept of the present application, and all should be considered as belonging to the protection scope of the present application.

Claims (10)

1. A shock absorber comprises an upper support, a lower support, a buffer spring, a piston cylinder, a piston rod and a buffer device; the buffer device is arranged in the lower support, the piston cylinder is connected to the lower support, one end of the piston rod is connected with the upper support, the other end of the piston rod extends into the piston cylinder and is movably connected with the piston cylinder, the buffer spring is sleeved on the outer side of the piston cylinder and is not in contact with the piston cylinder, one end of the buffer spring is abutted against the upper support, and the other end of the buffer spring is abutted against the lower support;

the method is characterized in that: the buffer device comprises a first buffer part, a second buffer part and a third buffer part; the second buffer part is arranged in the first buffer part and is movably connected with the first buffer part, and the third buffer part is arranged in the second buffer part and is movably connected with the second buffer part; a first elastic piece is arranged on one side, facing the lower support, of the second buffer piece, and is abutted against the lower support, and the first elastic piece lifts the second buffer piece by a preset height relative to the first buffer piece in a natural state; and a second elastic element is arranged in the third buffer element, and the second elastic element is used for lifting the third buffer element by a preset height in the second buffer element in a natural state, and the third buffer element does not protrude out of the second buffer element.

2. The shock absorber according to claim 1, wherein the first elastic member and the second elastic member are each a spring, the first cushion member, the second cushion member and the third cushion member are each a hollow cylinder having a through hole in an axial direction, and a height of the first cushion member is greater than a height of the second cushion member, which is greater than a height of the third cushion member.

3. The shock absorber according to claim 2, wherein a position of the lower support corresponding to the first buffer member is provided with a limiting groove, and the first buffer member is embedded in the limiting groove and connected with the lower support.

4. The shock absorber according to claim 2, wherein said first cushioning member is provided with a first raised edge disposed around an outer side wall of said first cushioning member, said second cushioning member is provided with a second raised edge disposed around an outer side wall of said second cushioning member; the width of the cross section of the first convex edge is larger than that of the cross section of the second convex edge.

5. The shock absorber according to claim 4, wherein the cross-sectional shape of the first convex edge is hexagonal, and the thickness of the first convex edge ranges from one quarter to one third of the height of the first buffer member.

6. The shock absorber according to claim 1, wherein the inner side wall of the lower support is provided with an internal thread, the outer side wall of the piston cylinder near one end of the lower support is provided with an external thread, and the external thread is matched with the internal thread to fix the piston cylinder and the lower support in a threaded manner.

7. The shock absorber according to claim 1, further comprising an air bag device and an oil pipe, wherein the side wall of the lower support is provided with a first through hole, and one end of the oil pipe is connected with the air bag device and the other end is connected with the first through hole.

8. The shock absorber according to claim 7, wherein the inner wall of the first through hole is provided with an internal thread, the outer side wall of the oil pipe near one end of the first through hole is provided with an external thread, and the internal thread of the first through hole is matched with the external thread of the oil pipe to fix the oil pipe and the lower support in a threaded manner.

9. The shock absorber according to claim 1, further comprising a snap member and a snap spring, wherein the snap member is sleeved on the piston rod and movably connected with the piston rod; the clamp spring is arranged on the inner side wall close to the opening of the piston cylinder, and the clamping piece is matched and fixed with the clamp spring.

10. A motor vehicle comprising a chassis, characterized in that the motor vehicle further comprises a shock absorber according to any one of claims 1 to 9, said shock absorber being connected to said chassis.

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