阅读说明：本技术 一种限位装置、减振器及车辆 (Limiting device, shock absorber and vehicle ) 是由 魏广川 雷伟英 席玉岭 王磊 王璋 于 2021-07-05 设计创作，主要内容包括：本申请提供一种限位装置、减振器及车辆,限位装置包括活塞杆、弹簧和设置在弹簧的端部的第一支承件,活塞杆的第一端设置有导向器,活塞杆的与第一端相对的第二端用于连接减振器活塞阀,弹簧套设于活塞杆,且弹簧位于活塞杆的第一端与第二端之间；第一支承件套设于活塞杆,第一支承件包括第一空心柱体、第二空心柱体,以及连通第一空心柱体内部和第二空心柱体内部的空心结构,第一空心柱体与第二空心柱体同轴连接,空心结构的直径大于活塞杆的直径；第一空心柱体位于弹簧内,弹簧的端部与第二空心柱体的第一面抵接,第二空心柱体的第一面为第二空心柱体的与第一空心柱体连接的一面。本申请可以提高限位装置的可靠性。(The application provides a limiting device, a shock absorber and a vehicle, wherein the limiting device comprises a piston rod, a spring and a first supporting piece arranged at the end part of the spring, a guider is arranged at the first end of the piston rod, the second end, opposite to the first end, of the piston rod is used for being connected with a shock absorber piston valve, the spring is sleeved on the piston rod, and the spring is located between the first end and the second end of the piston rod; the first supporting piece is sleeved on the piston rod and comprises a first hollow cylinder, a second hollow cylinder and a hollow structure for communicating the interior of the first hollow cylinder with the interior of the second hollow cylinder, the first hollow cylinder is coaxially connected with the second hollow cylinder, and the diameter of the hollow structure is larger than that of the piston rod; the first hollow cylinder is located the spring, and the tip of spring and the first face butt of the hollow cylinder of second, the first face of the hollow cylinder of second be the one side of the hollow cylinder of second and be connected with first hollow cylinder. This application can improve stop device's reliability.)

1. A limiting device is characterized by comprising a piston rod, a spring and a first supporting piece arranged at the end part of the spring, wherein a guider is arranged at the first end of the piston rod, the second end, opposite to the first end, of the piston rod is used for being connected with a shock absorber piston valve, the spring is sleeved on the piston rod, and the spring is positioned between the first end and the second end of the piston rod;

the first supporting piece is sleeved on the piston rod and comprises a first hollow cylinder, a second hollow cylinder and a hollow structure for communicating the interior of the first hollow cylinder with the interior of the second hollow cylinder, the first hollow cylinder is coaxially connected with the second hollow cylinder, and the diameter of the hollow structure is larger than that of the piston rod;

the first hollow cylinder is located in the spring, the end of the spring is abutted to the first face of the second hollow cylinder, and the first face of the second hollow cylinder is the face of the second hollow cylinder connected with the first hollow cylinder.

2. The spacing device of claim 1, further comprising a second bearing fixedly sleeved on a third end of said piston rod, said third end of said piston rod being located between said spring and said second end of said piston rod.

3. The stop device according to claim 2, wherein the second support member comprises a third hollow cylinder and a fourth hollow cylinder, the third hollow cylinder is fixedly disposed at the third end of the piston rod, the first surface of the fourth hollow cylinder has an area larger than that of the second surface of the second hollow cylinder, the first surface of the fourth hollow cylinder is opposite to the second surface of the second hollow cylinder, and the second surface of the second hollow cylinder is opposite to the first surface of the second hollow cylinder.

4. The spacing device of claim 1 wherein said first hollow cylinder is an interference fit with an inner race of said spring and said first support member is a clearance fit with said piston rod.

5. A spacing device according to claim 4 wherein the ends of the spring are provided with flats which abut against the first face of the second hollow cylinder.

6. The stop device of claim 5, wherein the first end of the first hollow cylinder is provided with a wedge-shaped structure, and the first end of the first hollow cylinder is opposite to the end of the first hollow cylinder connected to the second hollow cylinder.

7. The spacing device of claim 4 wherein the inner wall of said first support member is provided with a plurality of protrusions, said plurality of protrusions being evenly disposed along the inner wall of said first support member.

8. The limiting device according to claim 7, wherein the inner wall of the first supporting member is uniformly provided with 6 protrusions, each protrusion is a circular arc-shaped protrusion, and the 6 protrusions are in clearance fit with the piston rod.

9. A damper, characterized in that it comprises a spacing device as claimed in any one of claims 1 to 8.

10. A vehicle, characterized in that the vehicle comprises a stop device according to any one of claims 1 to 8.

Technical Field

The application relates to the technical field of automobiles, in particular to a limiting device, a shock absorber and a vehicle.

Background

The cross-country vehicle often runs on a bad road, the shock absorber is clamped between the shock absorber piston valve and the shock absorber guider through the limiting block to serve as a limiting device for stretching the shock absorber, so that the shock absorber can limit the wheel to jump down to a limit stroke, but the shock absorber piston valve can generate strong impact on the limiting block in the process of the wheel jumping down, the limiting block made of materials such as rubber and Thermoplastic Polyurethane (TPU) is easy to crack when working in a high-load environment, and the limiting device is low in reliability.

Disclosure of Invention

The application provides a stop device, shock absorber and vehicle to solve the lower problem of reliability.

In a first aspect, an embodiment of the present application provides a limiting device, which includes a piston rod, a spring, and a first support member disposed at an end of the spring, wherein a guide is disposed at a first end of the piston rod, a second end of the piston rod, opposite to the first end, is used for connecting a damper piston valve, the spring is sleeved on the piston rod, and the spring is located between the first end and the second end of the piston rod;

the first supporting piece is sleeved on the piston rod and comprises a first hollow cylinder, a second hollow cylinder and a hollow structure for communicating the interior of the first hollow cylinder with the interior of the second hollow cylinder, the first hollow cylinder is coaxially connected with the second hollow cylinder, and the diameter of the hollow structure is larger than that of the piston rod;

the first hollow cylinder is located in the spring, the end of the spring is abutted to the first face of the second hollow cylinder, and the first face of the second hollow cylinder is the face of the second hollow cylinder connected with the first hollow cylinder.

In a second aspect, an embodiment of the present application further provides a shock absorber, where the shock absorber includes the position limiting device disclosed in the first aspect of the embodiment of the present application.

In a third aspect, an embodiment of the present application further provides a vehicle, where the vehicle includes the limiting device disclosed in the first aspect of the embodiment of the present application.

In the embodiment of the application, the tip of spring is provided with first supporting part, the spring with first supporting part all overlaps and locates the piston rod, at the tensile in-process of shock absorber, shock absorber piston valve is right the spring compresses, works as when the spring compresses to the limit, realizes shock absorber limit function, and can cushion the motion of shock absorber piston valve in the spring compression process, can avoid using the stopper to work under the environment of high temperature, high load and produce the condition of inefficacy such as cracked easily, improve stop device's reliability.

Drawings

In order to more clearly illustrate the technical solutions of the present application, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings without inventive exercise.

Fig. 1 is a schematic structural diagram of a limiting device provided in an embodiment of the present application;

FIG. 2 is a schematic structural diagram of a second support block according to an embodiment of the present disclosure;

FIG. 3 is a cross-sectional view of a spacing device provided in an embodiment of the present application;

FIG. 4 is a schematic structural diagram of a spring according to an embodiment of the present disclosure;

fig. 5 is a schematic structural diagram of a first support seat according to an embodiment of the present disclosure;

fig. 6 is a radial cross-sectional view of a first bearing seat provided in an embodiment of the present application.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some, but not all, embodiments of the present application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

The terms "first," "second," and the like in the embodiments of the present application are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus. Further, as used herein, "and/or" means at least one of the connected objects, e.g., a and/or B and/or C, means 7 cases including a alone, B alone, C alone, and both a and B present, B and C present, both a and C present, and A, B and C present.

Referring to fig. 1, fig. 1 is a schematic structural diagram of a limiting device according to an embodiment of the present application, and as shown in fig. 1, the limiting device includes a piston rod 10, a spring 20, and a first support 30 disposed at an end of the spring 20, a guide 40 is disposed at a first end of the piston rod 10, a second end of the piston rod 10 opposite to the first end is used for connecting a damper piston valve, the spring 20 is sleeved on the piston rod 10, and the spring 20 is located between the first end and the second end of the piston rod 10;

the first support 30 is sleeved on the piston rod 10, the first support 30 includes a first hollow cylinder 31, a second hollow cylinder 32, and a hollow structure communicating the inside of the first hollow cylinder 31 and the inside of the second hollow cylinder 32, the first hollow cylinder 31 and the second hollow cylinder 32 are coaxially connected, and the diameter of the hollow structure is larger than that of the piston rod 10;

the first hollow column 31 is located in the spring 20, the end of the spring 20 is abutted to the first surface of the second hollow column 32, and the first surface of the second hollow column 32 is the surface of the second hollow column 32 connected with the first hollow column 31.

It will be appreciated that, during extension of the shock absorber, the axial distance between the shock absorber piston valve and the guide 40 is gradually reduced, the spring 20 moves on the piston rod 10, and the shock absorber piston valve compresses the spring 20, and when the spring 20 is compressed to the limit, the coils of the spring 20 are compressed and are the corresponding extension limit positions of the shock absorber. Meanwhile, the spring 20 generates an elastic force to buffer the movement of the piston valve during the compression process, thereby improving the ride comfort of the vehicle.

Two first bearings 30 may be respectively provided at both ends of the spring 20, an outer wall of the first hollow cylinder 31 is attached to an inner ring of the spring 20, a first surface of the second hollow cylinder 32 is in contact with an end of the spring 20 so that the two first bearings 30 are fixed to the ends of the spring 20, and when the damper piston valve compresses the spring 20 by the first bearings 30, the first bearings 30 located at both ends of the spring 20 limit movement and extension of the spring 20 by the hollow structure, thereby preventing the spring 20 from moving off an axis during compression.

In the embodiment of the application, the end of the spring 20 is provided with the first support 30, the spring 20 and the first support 30 are all sleeved on the piston rod 10, in the stretching process of the shock absorber, the shock absorber piston valve compresses the spring 20, when the spring 20 is compressed to the limit, the limit function of the shock absorber is realized, in addition, the motion of the shock absorber piston valve can be buffered in the compression process of the spring 20, the situation that the limit block is easy to generate failures such as fracture and the like when working in the high-temperature and high-load environment can be avoided, and the reliability of the limit device is improved.

Optionally, as shown in fig. 1, the limiting device further includes a second supporting member 50, the second supporting member 50 is fixedly sleeved on a third end of the piston rod 10, and the third end of the piston rod 10 is located between the spring 20 and the second end of the piston rod 10.

It should be understood that the position of the third end of the piston rod 10 may be determined according to the position limitation requirement, the movable range of the spring 20 is between the guide 40 and the second support member 50, and the position limitation effect of the position limitation device is determined by the movable range of the spring 20 and the elasticity of the spring 20, that is, the position of the third end of the piston rod 10 may determine the position limitation range of the position limitation device.

In this embodiment, the second support 50 is fixedly sleeved between the spring 20 and the second end of the piston rod 10, and when the damper piston valve compresses the spring 20, the damper piston valve impacts the second support 50, and the damper piston valve does not directly contact the first support 30 at the end of the spring 20, so that the damper piston valve can be protected and the stability of the damping characteristic of the damper can be ensured, thereby further improving the reliability of the position limiting device.

Optionally, as shown in fig. 1 and fig. 2, the second supporting element 50 includes a third hollow cylinder 51 and a fourth hollow cylinder 52, the third hollow cylinder 51 is fixedly disposed at the third end of the piston rod 10, a first surface of the fourth hollow cylinder 52 has an area larger than an area of a second surface of the second hollow cylinder 32, the first surface of the fourth hollow cylinder 52 is opposite to the second surface of the second hollow cylinder 32, and the second surface of the second hollow cylinder 32 is a surface of the second hollow cylinder 32 opposite to the first surface.

The sidewall of the second hollow cylinder 32 may include two planes along the axial direction, and one of the planes near the second surface of the second hollow cylinder 32 deviates from the axial direction of the second hollow cylinder 32, so that the area of the second surface of the second hollow cylinder 32 is smaller than the area of the first surface of the fourth hollow cylinder 52.

In this embodiment, when the second support 50 is impacted by the damper piston valve, the impact is transmitted to the first support 30 to compress the spring 20, and the area of the first surface of the fourth hollow cylinder 52 is larger than that of the second surface of the second hollow cylinder 32, so that the impact is reduced, the impact noise is reduced, and the impact abnormal sound generated under strong impact can be avoided, thereby improving the reliability of the stopper device and the riding comfort of the vehicle.

Alternatively, as shown in fig. 3, the first hollow cylinder 31 is in interference fit with the inner ring of the spring 20, and the first bearing 30 is in clearance fit with the piston rod 10.

In this embodiment, the first hollow cylinder 31 is in interference fit with the inner ring of the spring 20, the connection between the end of the spring 20 and the first bearing 30 can be fastened, the spring 20 and the first bearing are prevented from moving relative to each other, and the first bearing 30 and the piston rod 10 are in clearance fit, so that the spring 20 can be always compressed along the axis of the piston rod 10.

Alternatively, as shown in fig. 1 and 4, the end of the spring 20 is provided with a flat surface 21, and the flat surface 21 abuts against the first surface of the second hollow cylinder 32.

The flat surfaces 21 may be provided at both ends of the spring 20 by grinding, so that the flat surfaces 21 at both ends of the spring 20 are in contact with the corresponding second hollow cylinders 32.

In this embodiment, the first hollow cylinder 31 is positioned inside the spring 20, and the flat surfaces 21 at both ends of the spring 20 are in contact with the first surface of the second hollow cylinder 32, so that the stability of the first support 30 provided at the end of the spring 20 can be improved.

Optionally, as shown in fig. 3, a first end of the first hollow cylinder 31 is provided with a wedge structure, and the first end of the first hollow cylinder 31 is opposite to an end of the first hollow cylinder 31 connected to the second hollow cylinder 32.

It will be appreciated that the interference fit of the first hollow cylinder 31 with the inner race of the spring 20, i.e. the diameter of the first hollow cylinder 31 is larger than the inner race of the spring 20, facilitates the assembly of the first hollow cylinder 31 with the spring 20 by the wedge-shaped structure of the first end of the first hollow cylinder 31.

Alternatively, as shown in fig. 5 and 6, the inner wall of the first bearing 30 is provided with a plurality of protrusions 33, and the plurality of protrusions 33 are uniformly arranged along the inner wall of the first bearing 30.

In this embodiment, the plurality of protrusions 33 are uniformly formed on the inner wall of the first support 30, so that the weight of the shock absorber can be reduced, the flow area of the shock absorber oil in the stretching process of the shock absorber can be increased, and the damping characteristic of the shock absorber is prevented from being affected due to unsmooth flow of the shock absorber oil.

Optionally, as shown in fig. 6, the inner wall of the first support 30 is uniformly provided with 6 protrusions 33, each protrusion 33 is an arc protrusion, and the 6 protrusions 33 are in clearance fit with the piston rod 10.

Fig. 6 is a radial sectional view of the first bearing 30, and as shown in fig. 6, by taking the example that 6 protrusions 33 are uniformly arranged on the inner wall of the first bearing 30, it can be understood that circular arc-shaped protrusions are uniformly arranged on the inner wall of the first bearing 30, and the surfaces of the protrusions 33 and the inner wall surface of the first bearing 30 are both smooth surfaces, so that the effects of reducing weight and increasing the flow area of the damper oil can be achieved.

The embodiment of the application further provides a shock absorber, and the shock absorber comprises the limiting device. It should be noted that the shock absorber provided in the embodiment of the present application includes all technical features in the embodiment of the limiting device described above, and can achieve the same technical effects, and for avoiding repetition, details are not described here again.

The embodiment of the application further provides a vehicle, the vehicle comprises the limiting device. It should be noted that the vehicle provided in the embodiment of the present application includes all the technical features in the embodiment of the limiting device described above, and can achieve the same technical effects, and for avoiding repetition, details are not described here again.

And the vehicle can reduce the impact of the piston valve of the shock absorber while realizing the limiting function of the shock absorber through the limiting device, reduce abnormal sound generated in the impact process for the off-road vehicle which often runs on a bad road, and also can improve the smoothness in the running process of the vehicle and realize the limiting function of wheel jumping down.

It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element. Further, it should be noted that the scope of the methods and apparatus of the embodiments of the present application is not limited to performing the functions in the order illustrated or discussed, but may include performing the functions in a substantially simultaneous manner or in a reverse order based on the functions involved, e.g., the methods described may be performed in an order different than that described, and various steps may be added, omitted, or combined. In addition, features described with reference to certain examples may be combined in other examples.

While the present embodiments have been described with reference to the accompanying drawings, it is to be understood that the invention is not limited to the precise embodiments described above, which are meant to be illustrative and not restrictive, and that various changes may be made therein by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.