Structure for rapidly establishing rebound damping force value of shock absorber

Abstract

The utility model relates to a springback hydraulic buffer structure, and provides a structure for a shock absorber to quickly establish a springback damping force value, which comprises a shock absorber shell, a buffer piston arranged in the shock absorber shell, and a guide oil seal seat arranged on the inner side of the shock absorber shell; the buffer valve plate is arranged on the inner side of the buffer piston in a sleeving mode, when the shock absorber is stretched to the limiting position, the buffer valve plate covers a through hole of the buffer piston, the buffer valve plate and the guide oil seal base form a relatively-closed cavity, and therefore a large rebound damping force value is rapidly established through the structure. One part of relative sealing oil flows out from a small hole in the side surface of the guide oil seal seat, and the other part of the relative sealing oil flows out from a gap between the buffer piston and the guide oil seal seat; according to the shock absorber, the requirement for small rebound damping at a low speed can be met, the buffer valve plate is tightly attached to the buffer piston, a relatively-closed cavity is formed between the buffer valve plate and the guide oil seal base, and therefore a large damping force value can be rapidly established when the shock absorber is close to the stretching limit.

Description

Technical Field

[0001] The utility model relates to a rebound hydraulic buffer structure, in particular to a structure for a shock absorber to quickly establish a rebound damping force value. Background Art

[0002] The rebound damping of the shock absorber is usually controlled by the main piston, and generally increases linearly with the increase of the piston linear velocity. In order to meet the requirements of large damping force values, the rebound damping at low speeds must be increased simultaneously, thereby reducing the comfort on paved roads and light off-road conditions.

[0003] To this end, the present application proposes a structure for a shock absorber to quickly establish a rebound damping force value, which optimizes the way of establishing rebound damping, and can not only meet the requirement of small rebound damping at low speed, but also meet the requirement of large damping force value when approaching the rebound limit. Utility Model Content

[0004] The purpose of the embodiments of the utility model is to provide a structure for a shock absorber to quickly establish a rebound damping force value, aiming to solve the problems existing in the above-mentioned background technology.

[0005] The embodiment of the utility model is implemented as follows: a structure for quickly establishing a rebound damping force value of a shock absorber, comprising a shock absorber housing, and further comprising:

[0006] A buffer piston, the buffer piston is arranged inside the shock absorber housing, the middle part of the buffer piston is threadedly connected with a piston rod; the buffer piston is provided with a plurality of through holes with a diameter of 4 mm;

[0007] A guide oil seal seat, wherein the guide oil seal seat is installed on the inner side of the shock absorber housing;

[0008] A buffer valve sheet, which is sleeved on the inner side of the buffer piston, and when the shock absorber is stretched to the limit position, the buffer valve sheet covers all the through holes on the buffer piston, and forms a relatively closed cavity with the guide oil seal seat, so that a large rebound damping force value is quickly established through this structure; an elastic retaining ring is also installed on the side of the buffer valve sheet on the buffer piston to prevent the buffer valve sheet from falling off;

[0009] Among them, part of the relative sealing oil flows out from the small hole on the side of the guide oil seal seat, and the other part flows out from the gap between the buffer piston and the guide oil seal seat, thereby achieving the effect of gradual change of the rebound damping force value.

[0010] Preferably, the buffer valve sheet has a thickness of 1 mm and a floating stroke of 2 mm, so as to ensure the sensitivity of the buffer valve sheet when floating and avoid the problem of sticking.

[0011] Preferably, a DU bushing is axially installed between the piston rod and the guide oil seal seat to ensure the coaxiality of the buffer piston.

[0012] Preferably, step seals and flat wire retaining rings for holes are respectively installed on both sides of the inner side of the guide oil seal seat;

[0013] Wherein, the step seal is located between the piston rod and the guide oil seal seat, and the step seal is located on the side of the DU bushing;

[0014] The flat wire retaining ring for the hole is arranged at the end of the guide oil seal seat, and the flat wire retaining ring for the hole is also in contact with the inner side of the shock absorber housing.

[0015] The embodiment of the utility model provides a structure for a shock absorber to quickly establish a rebound damping force value, which can not only meet the smaller rebound damping at low speeds, but also because the buffer valve plate is in close contact with the buffer piston, a relatively closed cavity is formed between the buffer valve plate and the guide oil seal seat, thereby quickly establishing a large damping force value when the shock absorber approaches the stretching limit. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A schematic diagram of a structure for quickly establishing a rebound damping force value of a shock absorber provided by an embodiment of the utility model;

[0017] Figure 2 A top view of a buffer piston in a structure for quickly establishing a rebound damping force value of a shock absorber provided by an embodiment of the utility model;

[0018] Figure 3 A top view of an elastic retaining ring in a structure for quickly establishing a rebound damping force value of a shock absorber provided by an embodiment of the utility model;

[0019] In the attached figure: 1-piston rod; 2-buffer piston; 3-buffer valve plate; 4-elastic retaining ring; 5-guide oil seal seat; 6-step seal; 7-DU bushing; 8-flat wire retaining ring for hole. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0021] The specific implementation of the present utility model is described in detail below in conjunction with specific embodiments.

[0022] like Figures 1 to 3As shown, it is a structural diagram of a shock absorber for quickly establishing a rebound damping force value provided by an embodiment of the utility model, comprising a shock absorber housing, a buffer piston 2, a guide oil seal seat 5 and a buffer valve plate 3, wherein the buffer piston 2 is arranged inside the shock absorber housing, and the middle part of the buffer piston 2 is threadedly connected with a piston rod 1; the buffer piston 2 is provided with a plurality of through holes with a diameter of 4 mm; the guide oil seal seat 5 is installed on the inner side of the shock absorber housing, and a DU bushing 7 is axially installed between the piston rod 1 and the guide oil seal seat 5 to ensure the coaxiality of the buffer piston 2; the buffer valve plate 3 is sleeved on the inner side of the buffer piston 2, and when the shock absorber is stretched to the limit position When the buffer piston 2 is in the state of being set, all the through holes on the buffer piston 2 are covered by the buffer valve plate 3, and a relatively closed cavity is formed with the guide oil seal seat 5, so that a large rebound damping force value is quickly established through this structure; an elastic retaining ring 4 is also installed on the side of the buffer valve plate 3 on the buffer piston 2 to prevent the buffer valve plate 3 from falling off; wherein, a part of the relatively sealed oil flows out from the small hole on the side of the guide oil seal seat 5, and the other part flows out from the gap between the buffer piston 2 and the guide oil seal seat 5, so as to achieve the effect of gradual change of the rebound damping force value, and the rebound damping force value can be determined by the size and position of the through hole on the side of the buffer piston 2 to ensure the smoothness of the change of the damping force value.

[0023] The present application provides a structure for a shock absorber to quickly establish a rebound damping force value, which can not only meet the smaller rebound damping at low speeds, but also because the buffer valve plate 3 is in close contact with the buffer piston 2, a relatively closed cavity is formed between the buffer valve plate 3 and the guide oil seal seat 5, thereby quickly establishing a large damping force value when the shock absorber approaches the stretching limit.

[0024] In one example of the present invention, the internal thread of the buffer piston 2 is M22*1.0, and it is necessary to ensure that there are no sharp corners or burrs on the piston; in addition, the root of the piston shaft must be cleaned, otherwise it is easy to cause jamming.

[0025] like Figure 1 As shown, as a preferred embodiment of the utility model, the thickness of the buffer valve plate 3 is 1 mm, and the floating stroke is 2 mm, which is used to ensure the sensitivity of the buffer valve plate 3 when floating and avoid the problem of sticking.

[0026] In an example of the present invention, a side of the buffer valve plate 3 close to the oil hole arranged on the buffer piston 2 must be rounded to prevent sticking.

[0027] like Figure 1 As shown, as another preferred embodiment of the utility model, the inner sides of the guide oil seal seat 5 are respectively installed with a step seal 6 and a flat wire retaining ring 8 for holes;

[0028] The step seal 6 is located between the piston rod 1 and the guide oil seal seat 5, and the step seal 6 is located on the side of the DU bushing 7;

[0029] The flat wire retaining ring 8 for holes is arranged at the end of the guide oil seal seat 5, and the flat wire retaining ring 8 for holes is also in contact with the inner side of the shock absorber housing.

[0030] In one example of the utility model, by arranging the step seal 6, the durability of the rebound hydraulic buffer structure can be ensured, and at the same time, the hole flat wire retaining ring 8 can ensure that the guide oil seal seat 5 does not fall off after being impacted when the tensile strength is >200KN.

[0031] To sum up, when the shock absorber is compressed, the buffer valve plate 3 separates from the plane of the buffer piston 2, and the small hole on the buffer piston 2 is fully opened, which can avoid the phenomenon of vacuum back suction. For light off-road or paved road driving, the rebound damping force value can be reduced to a certain extent in the low-speed section to ensure its driving comfort. For extreme off-road conditions, this structure can quickly establish the rebound damping force value to meet the performance requirements of extreme off-road.

[0032] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention.

[0033] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A structure for quickly establishing a rebound damping force value of a shock absorber, comprising a shock absorber housing, characterized in that: Also includes: A buffer piston, the buffer piston is arranged inside the shock absorber housing, the middle part of the buffer piston is threadedly connected with a piston rod; the buffer piston is provided with a plurality of through holes with a diameter of 4 mm; A guide oil seal seat, wherein the guide oil seal seat is installed inside the shock absorber housing; A buffer valve sheet, which is sleeved on the inner side of the buffer piston, and when the shock absorber is stretched to the limit position, the buffer valve sheet covers all the through holes on the buffer piston, and forms a relatively closed cavity with the guide oil seal seat, so that a large rebound damping force value is quickly established through this structure; an elastic retaining ring is also installed on the side of the buffer valve sheet on the buffer piston to prevent the buffer valve sheet from falling off; Among them, part of the relative sealing oil flows out from the small hole on the side of the guide oil seal seat, and the other part flows out from the gap between the buffer piston and the guide oil seal seat, thereby achieving the effect of gradual change of the rebound damping force value.

2. The structure for quickly establishing rebound damping force value of a shock absorber according to claim 1, characterized in that: The thickness of the buffer valve plate is 1 mm, and the floating stroke is 2 mm, which is used to ensure the sensitivity of the buffer valve plate when floating and avoid the problem of sticking.

3. The structure for quickly establishing rebound damping force value of a shock absorber according to claim 1, characterized in that: A DU bushing is axially installed between the piston rod and the guide oil seal seat to ensure the coaxiality of the buffer piston.

4. The structure for quickly establishing a rebound damping force value of a shock absorber according to claim 1, characterized in that: The inner sides of the guide oil seal seat are respectively installed with a step seal and a flat wire retaining ring for the hole; Wherein, the step seal is located between the piston rod and the guide oil seal seat, and the step seal is located on the side of the DU bushing; The flat wire retaining ring for the hole is arranged at the end of the guide oil seal seat, and the flat wire retaining ring for the hole is also in contact with the inner side of the shock absorber housing.

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