CN220726968U

CN220726968U - Overvoltage protection device of shock absorber

Info

Publication number: CN220726968U
Application number: CN202322511471.6U
Authority: CN
Inventors: 丁丹
Original assignee: BEIJING INFORMATION TECHNOLOGY COLLEGE
Current assignee: BEIJING INFORMATION TECHNOLOGY COLLEGE
Priority date: 2023-09-15
Filing date: 2023-09-15
Publication date: 2024-04-05
Anticipated expiration: 2033-09-15

Abstract

The utility model relates to the technical field of automobile parts, in particular to an overpressure protection device of a shock absorber, which comprises a shock absorber cylinder body, wherein a piston is connected in a sliding manner in the shock absorber cylinder body, the middle part of the top of the piston is provided with a movable rod, the top end of the movable rod is fixedly connected with a circular positioning disc, the middle part of the outer wall of the shock absorber cylinder body is provided with a second annular positioning disc, the top of the second annular positioning disc is provided with an annular rubber pad, the outer wall of the circular positioning disc is provided with a third annular positioning disc, and the bottom of the third annular positioning disc is provided with a limiting sleeve. This shock absorber overvoltage protection device, when the shock absorber receives great impact force instantaneously, on limit sleeve's bottom can strike annular rubber pad to prevent limit sleeve and continue to move downwards, avoid circular positioning disk to move downwards, and then prevent that first spring from being excessively extruded, fixed pipe plays spacing effect to the removal of third annular positioning disk, and cooperation limit sleeve can play overvoltage protection effect to first spring.

Description

Overvoltage protection device of shock absorber

Technical Field

The utility model relates to the technical field of automobile parts, in particular to an overvoltage protection device of a shock absorber.

Background

The vehicle damper is actually a vibration damper. Shock absorbers are used in automobiles not only on suspensions but also in other locations, for example in cabins, saddles, steering wheels, etc., and also as bumpers for vehicle bumpers.

In order to improve the running smoothness of an automobile, the elastic element is impacted to generate vibration, the vibration absorber is arranged in parallel with the elastic element in the suspension, and the vibration absorber is a hydraulic vibration absorber in the automobile suspension system for damping vibration, for example, a vibration damping device for an automobile suspension disclosed in Chinese patent CN215474343U comprises a vibration absorber cylinder body, a piston, a main shaft and a spring, wherein the piston is slidably arranged in the vibration absorber cylinder body, one end of the main shaft is slidably inserted in the vibration absorber cylinder body and connected with the piston, the piston reciprocates in the vibration absorber cylinder body, viscous oil in the vibration absorber cylinder body passes through an orifice on the piston, and the viscous oil generates friction with a hole wall when having certain viscosity and the viscous oil passes through the orifice, so that kinetic energy is converted into heat energy to be emitted into air, thereby achieving the vibration damping function, the spring is sleeved on the vibration absorber cylinder body, one end of the spring is connected with the end of the vibration absorber cylinder body, the other end of the spring is connected with the main shaft, when the spring receives impact force, the kinetic energy is converted into elastic potential energy to be stored, and released when the wheel returns to an original running state, and the piston can play a role of vibration damping.

The stiffness of the spring in the automobile shock absorber in the prior art is fixed, when the automobile shock absorber encounters great vibration reduction and buffering, the spring is excessively extruded by the instant large impact force, the spring structure is easily damaged, and the vibration reduction performance of the shock absorber is further deteriorated.

In view of the above, the present utility model provides an overpressure protection device for a shock absorber, which can limit the downward displacement of a sleeve by arranging the sleeve, and prevent the first spring from being excessively extruded; by arranging the annular rubber pad, the sleeve is buffered from moving, so that the sleeve is prevented from directly striking the second annular positioning disc; the fixed round tube and the positioning rod are arranged to guide the up-and-down movement of the third annular positioning disc; through setting up the second spring, further to the third annular positioning disk downwardly moving buffering, further improve the damping effect.

Disclosure of Invention

The utility model aims to provide an overvoltage protection device of a shock absorber, which solves the defects existing in the prior art, and the technical problem to be solved by the utility model is realized by the following technical scheme.

The utility model provides a shock absorber overvoltage protection device, includes the shock absorber barrel, the interior sliding connection of shock absorber barrel has the piston, the upper end middle part of piston is equipped with the movable rod, the outside cover of movable rod is equipped with the ripple telescopic sleeve, the top of movable rod wears out the up end and the upper end fixedly connected with circular positioning disk of shock absorber barrel, the upper portion of the outer wall of shock absorber barrel is equipped with first annular positioning disk, be equipped with first spring between first annular positioning disk and the circular positioning disk, the middle part of shock absorber barrel outer wall is equipped with the second annular positioning disk, the upper surface of second annular positioning disk is equipped with annular rubber pad, the periphery of circular positioning disk is equipped with the third annular positioning disk, the lower terminal surface of third annular positioning disk is equipped with spacing sleeve, spacing sleeve's position with the position of annular rubber pad mutually matches.

Preferably, the lower end face of the circular positioning disk is provided with a first annular groove, the upper end face of the first annular positioning disk is provided with a second annular groove, the upper end of the first spring is arranged in the first annular groove, and the bottom end of the first spring is arranged in the second annular groove.

Preferably, the inner diameter of the limiting sleeve is larger than the outer diameter of the first annular positioning disc, the outer diameter of the annular rubber pad is larger than the outer diameter of the limiting sleeve, and the inner diameter of the annular rubber pad is smaller than the inner diameter of the limiting sleeve.

Preferably, the position of the upper end face of the second annular positioning disk, which is close to the outer edge, is provided with a plurality of fixed circular pipes which are arranged in an annular array, the position of the lower end face of the third annular positioning disk, which is close to the outer edge, is provided with a plurality of positioning rods which are arranged in an annular array, the number and the positions of the positioning rods are mutually matched with the fixed circular pipes, and the positioning rods are respectively connected in the fixed circular pipes corresponding to the positions of the positioning rods in a sliding manner.

Preferably, the number of the fixed round tubes is four.

Preferably, the upper end face of the fixed circular tube is higher than the upper end face of the shock absorber cylinder body, a second spring is sleeved on the outer side of the fixed circular tube, the lower end of the second spring is abutted against the upper end face of the second annular positioning disc, and the upper end of the second spring is abutted against the lower end face of the third annular positioning disc.

Preferably, the lower end of the shock absorber cylinder body is provided with a first connecting part, and the upper end of the circular positioning disk is provided with a second connecting part.

Preferably, a plurality of orifices arranged in an annular array are arranged at positions, close to the outer edge, on the piston.

Compared with the prior art, the utility model has the beneficial effects that:

1. when the shock absorber is subjected to larger impact force instantaneously, the bottom of the limit sleeve can collide with the annular rubber pad, so that the limit sleeve is prevented from continuously moving downwards, the circular positioning disc is prevented from moving downwards, and the first spring is prevented from being excessively extruded, so that the overvoltage protection effect is achieved.

2. The annular rubber pad plays a certain buffering role on the limiting sleeve, and the limiting sleeve is prevented from directly striking the top of the second annular positioning disc.

3. The upper end face of the fixed circular tube is higher than the upper end face of the shock absorber cylinder body, the third annular positioning disc is limited in movement, the third annular positioning disc is prevented from excessively moving, and the first spring can be protected from overvoltage by being matched with the limiting sleeve.

4. The four locating rods are respectively and slidably connected into the four fixed round tubes, so that the third annular locating disc stably moves up and down, the pressure of the movable rod is reduced, and the movable rod is effectively prevented from being bent.

Drawings

Figure 1 is a schematic diagram of the overall structure of the present utility model,

figure 2 is a schematic view of a part of the structure of the present utility model,

figure 3 is a second schematic view of a part of the structure of the present utility model,

figure 4 is a schematic diagram of a third part of the structure of the present utility model,

fig. 5 is a schematic diagram of an assembly structure of a third annular positioning disc, a positioning rod and a limiting sleeve in the present utility model.

The reference numerals in the drawings are in turn: 1. the shock absorber comprises a shock absorber cylinder body, 2, a piston, 20, an orifice, 3, a movable rod, 4, a circular positioning disc, 40, a first annular groove, 5, a first annular positioning disc, 50, a second annular groove, 6, a corrugated telescopic sleeve, 7, a first spring, 8, a first connecting part, 9, a second connecting part, 10, a second annular positioning disc, 11, a fixed circular tube, 12, an annular rubber pad, 13, a third annular positioning disc, 14, a positioning rod, 15, a limiting sleeve, 16 and a second spring.

Detailed Description

It should be noted that, in the case of no conflict, the embodiments and features in the embodiments may be combined with each other. The utility model will be described in detail below with reference to the drawings in connection with embodiments.

Referring to fig. 1-5, the present utility model provides a technical solution:

the utility model provides a shock absorber overvoltage protection device, including shock absorber barrel 1, sliding connection has piston 2 in shock absorber barrel 1, a plurality of orifice 20 that are arranged with annular array on the position that is close to the outward flange on the piston 2, piston 2 upper end middle part is equipped with movable rod 3, the outside cover of movable rod 3 is equipped with ripple telescopic handle 6, the up end and the upper end fixedly connected with circular positioning disk 4 of shock absorber barrel 1 are worn out on the top of movable rod 3, the upper portion of the outer wall of shock absorber barrel 1 is equipped with first annular positioning disk 5, be equipped with first spring 7 between first annular positioning disk 5 and the circular positioning disk 4, the lower extreme of ripple telescopic handle 6 and the lower terminal surface fixed connection of circular positioning disk 4, the up end fixed connection of ripple telescopic handle 5 can avoid the dust adhesion in the outer wall of movable rod 3, avoid the dust to enter into in the shock absorber barrel 1.

The middle part of shock absorber barrel 1 outer wall is equipped with second annular positioning disk 10, be equipped with annular rubber pad 12 on the up end of second annular positioning disk 10, the periphery of circular positioning disk 4 is equipped with third annular positioning disk 13, the lower terminal surface of third annular positioning disk 13 is equipped with spacing sleeve 15, spacing sleeve 15 is located annular rubber pad 12 directly over, when this shock absorber receives great impact force instantaneously, the bottom of spacing sleeve 15 can strike annular rubber pad 12 to prevent spacing sleeve 15 to continue to move downwards, avoid circular positioning disk 4 to move downwards, and then prevent that first spring 7 from being excessively extruded, play the overvoltage protection effect.

In this embodiment, the bottom of circular positioning disk 4 has seted up first annular groove 40, and second annular groove 50 has been seted up at the top of first annular positioning disk 5, and the top of first spring 7 is located first annular groove 40, and the bottom of first spring 7 is located second annular groove 50, and first annular groove 40 and second annular groove 50 are spacing to the upper and lower both ends of first spring 7 respectively, can effectively avoid first spring 7 to rock.

Specifically, the lower extreme of shock absorber barrel 1 is equipped with first connecting portion 8, and the upper end of circular positioning disk 4 is equipped with second connecting portion 9, and first connecting portion 8 and second connecting portion 9 are standard components for use with the car suspension connection.

Further, the internal diameter of the spacing sleeve 15 is greater than the external diameter of the first annular positioning disk 5, the external diameter of the annular rubber gasket 12 is greater than the external diameter of the spacing sleeve 15, and the internal diameter of the annular rubber gasket 12 is less than the internal diameter of the spacing sleeve 15, so that the bottom of the spacing sleeve 15 can be impacted at the top of the annular rubber gasket 12, the spacing sleeve 15 is buffered to a certain extent through the annular rubber gasket 12, and the top of the second annular positioning disk 10 is prevented from being directly impacted by the spacing sleeve 15.

Further, the position of the upper end face of the second annular positioning disk 10, which is close to the outer edge, is provided with a plurality of fixed circular pipes 11 distributed in an annular array, the position of the lower end face of the third annular positioning disk 13, which is close to the outer edge, is provided with a plurality of positioning rods 14 distributed in an annular array, the number and positions of the positioning rods 14 are mutually matched with those of the fixed circular pipes 11, the positioning rods 14 are respectively and slidably connected in the fixed circular pipes 11 corresponding to the positions of the positioning rods, the fixed circular pipes 11 and the positioning rods 14 are arranged, so that the up-and-down movement of the third annular positioning disk 13 plays a role in guiding, the up-and-down movement of the third annular positioning disk 13 is more stable, the pressure of the movable rod 3 is reduced, and an auxiliary effect is achieved.

Further, the upper end surface of the fixed round tube 11 is higher than the upper end surface of the shock absorber cylinder body 1, plays a role in limiting the movement of the third annular positioning disk 13, avoids the excessive movement of the third annular positioning disk 13, and can play an overpressure protection role on the first spring 7 by matching with the limiting sleeve 15,

the outside cover of fixed pipe 11 is equipped with second spring 16, and the lower extreme of second spring 16 and the up end butt of second annular positioning disk 10, the upper end of second spring 16 and the lower terminal surface of third annular positioning disk 13 are offset, can play the cushioning effect to the second annular positioning disk 10 of relative movement and third annular positioning disk 13 through second spring 16, and cooperation shock absorber body can further improve the damping effect.

When the shock absorber overvoltage protection device of the embodiment is used, when the shock absorber is subjected to larger impact force instantaneously, the bottom of the limit sleeve 15 can collide with the annular rubber pad 12, so that the limit sleeve 15 is prevented from continuously moving downwards, the circular positioning disc 4 is prevented from moving downwards, the first springs 7 are further prevented from being excessively extruded, meanwhile, the four second springs 16 are compressed, the third annular positioning disc 13 is prevented from moving downwards by the top ends of the four fixed round tubes 11, and the limit sleeve 15 is matched with the first springs 7 to play an overvoltage protection role.

It should be noted that the foregoing detailed description is exemplary and is intended to provide further explanation of the utility model. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the present application. As used herein, the singular is intended to include the plural unless the context clearly indicates otherwise. Furthermore, it will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, steps, operations, devices, components, and/or groups thereof.

It should be noted that the terms "first," "second," and the like in the description and claims of the present application and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the terms so used are interchangeable under appropriate circumstances such that the embodiments of the application described herein are capable of operation in sequences other than those illustrated or otherwise described herein.

Furthermore, the terms "comprise" and "have," as well as any variations thereof, are intended to cover a non-exclusive inclusion. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those elements but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

Spatially relative terms, such as "above … …," "above … …," "upper surface at … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial location relative to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "above" or "over" other devices or structures would then be oriented "below" or "beneath" the other devices or structures. Thus, the exemplary term "above … …" may include both orientations of "above … …" and "below … …". The device may also be positioned in other different ways, such as rotated 90 degrees or at other orientations, and the spatially relative descriptors used herein interpreted accordingly.

In the above detailed description, reference is made to the accompanying drawings, which form a part hereof. In the drawings, like numerals typically identify like components unless context indicates otherwise. The illustrated embodiments described in the detailed description, drawings, and claims are not meant to be limiting. Other embodiments may be utilized, and other changes may be made, without departing from the spirit or scope of the subject matter presented herein.

The above description is only of the preferred embodiments of the present utility model and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims

1. An overpressure protection device for a shock absorber, characterized in that: including shock absorber barrel (1), be connected with piston (2) in shock absorber barrel (1), the upper end middle part of piston (2) is equipped with movable rod (3), the outside cover of movable rod (3) is equipped with ripple telescopic sleeve (6), the top of movable rod (3) is worn out the up end and the upper end fixedly connected with circular positioning disk (4) of shock absorber barrel (1), the upper portion of the outer wall of shock absorber barrel (1) is equipped with first annular positioning disk (5), be equipped with first spring (7) between first annular positioning disk (5) and circular positioning disk (4), the middle part of shock absorber barrel (1) outer wall is equipped with second annular positioning disk (10), the up end of second annular positioning disk (10) is equipped with annular rubber pad (12), the periphery of circular positioning disk (4) is equipped with third annular positioning disk (13), the lower terminal surface of third annular positioning disk (13) is equipped with spacing sleeve (15), the position of spacing sleeve (15) with the position of annular rubber pad (12) each other matches.

2. The absorber overvoltage protection device of claim 1, wherein: the circular positioning disk is characterized in that a first annular groove (40) is formed in the lower end face of the circular positioning disk (4), a second annular groove (50) is formed in the upper end face of the first annular positioning disk (5), the upper end of the first spring (7) is arranged in the first annular groove (40), and the bottom end of the first spring (7) is arranged in the second annular groove (50).

3. The absorber overvoltage protection device of claim 1, wherein: the inner diameter of the limiting sleeve (15) is larger than the outer diameter of the first annular positioning disc (5), the outer diameter of the annular rubber pad (12) is larger than the outer diameter of the limiting sleeve (15), and the inner diameter of the annular rubber pad (12) is smaller than the inner diameter of the limiting sleeve (15).

4. The absorber overvoltage protection device of claim 1, wherein: the upper end face of the second annular positioning disk (10) is close to the position of the outer edge and is provided with a plurality of fixed circular pipes (11) which are distributed in an annular array, the lower end face of the third annular positioning disk (13) is close to the position of the outer edge and is provided with a plurality of positioning rods (14) which are distributed in an annular array, the number and the positions of the positioning rods (14) are mutually matched with those of the fixed circular pipes (11), and the positioning rods (14) are respectively connected in the fixed circular pipes (11) corresponding to the positions of the positioning rods in a sliding mode.

5. The absorber overvoltage protection device of claim 4, wherein: the number of the fixed round tubes (11) is four.

6. The absorber overvoltage protection device of claim 4, wherein: the upper end face of the fixed circular tube (11) is higher than the upper end face of the shock absorber cylinder body (1), a second spring (16) is sleeved on the outer side of the fixed circular tube (11), the lower end of the second spring (16) is abutted against the upper end face of the second annular positioning disc (10), and the upper end of the second spring (16) is abutted against the lower end face of the third annular positioning disc (13).

7. The absorber overvoltage protection device of claim 1, wherein: the lower end of the shock absorber cylinder body (1) is provided with a first connecting part (8), and the upper end of the circular positioning disc (4) is provided with a second connecting part (9).

8. The absorber overvoltage protection device of claim 1, wherein: and a plurality of orifices (20) which are distributed in an annular array are arranged at the position, close to the outer edge, of the piston (2).