CN215521781U

CN215521781U - Adjusting structure for linearly adjusting damping force of shock absorber

Info

Publication number: CN215521781U
Application number: CN202023043527.2U
Authority: CN
Inventors: 卢伟
Original assignee: Zhejiang Roadtamer Auto Parts Co ltd
Current assignee: Zhejiang Roadtamer Auto Parts Co ltd
Priority date: 2020-12-17
Filing date: 2020-12-17
Publication date: 2022-01-14
Anticipated expiration: 2030-12-17

Abstract

The utility model provides an adjusting structure for linearly adjusting damping force of a shock absorber, and belongs to the technical field of shock absorbers. An adjusting structure for linearly adjusting the damping force of a shock absorber is arranged in the shock absorber and comprises a piston rod body, a first oil duct axially arranged in the piston rod body, a drainage channel penetrating through the side wall of the piston rod body and communicated with the first oil duct, and an adjusting valve core which is reciprocatingly arranged in the first oil duct and used for opening or closing the drainage channel; one end of the drainage channel, which is close to the first oil channel, is provided with a linear valve port, and the end part of the linear valve port is provided with an adjusting part which is used for enabling the opening degree to be linearly related to the liquid flow rate flowing through the linear valve port when the linear valve port is opened or closed. The linear valve port is arranged on the drainage channel, the linear flow change of fluid is realized by matching with the adjusting valve core, and the adjusting valve core moves in the first oil duct, so that the linear adjustment of the damping force can be realized.

Description

Adjusting structure for linearly adjusting damping force of shock absorber

Technical Field

The utility model relates to the technical field of shock absorbers, in particular to an adjusting structure for linearly adjusting damping force of a shock absorber.

Background

The shock absorber is used for inhibiting the shock when the elastic element rebounds after absorbing shock and the impact from the road surface. The damping device is widely applied to automobiles and is used for accelerating the attenuation of the vibration of a frame and an automobile body so as to improve the driving smoothness of the automobiles. Traditional bumper shock absorber, its damping often can not be adjusted, and when the special purpose's such as cycle racing car the car went on the road conditions of difference, the range that the car jolted also can change along with it, leads to the bumper shock absorber unable adaptability ground to provide the damping force who accords with current road conditions, to above-mentioned problem, also appear some adjustable bumper shock absorbers of damping on the market, but its structure is general complicated, and the regulating effect is relatively poor, can't satisfy user's user demand.

As shown in fig. 1-2, the inner structure of the hollow piston rod b of the conventional shock absorber is schematically illustrated, and the bypass flow is influenced by adjusting the relative gap between the valve core a and the bottom sleeve c, so as to adjust the opening X of the proportional valve of the shock absorber, thereby achieving the purpose of adjusting the damping force range of the shock absorber. The adjusting part of the valve core a is conical, and when the valve core a moves in the hollow piston rod b, the area of a drain hole formed by the through hole d on the hollow piston rod b is in nonlinear change, so that the linear adjustment of the damping force cannot be realized, the adjusting effect of the shock absorber is poor, and the manufacturing cost of the shock absorber is improved.

SUMMERY OF THE UTILITY MODEL

The utility model aims to realize independent adjustment of compression damping force and recovery damping force of a shock absorber, and provides an adjusting structure for linearly adjusting damping force of the shock absorber, aiming at the defects of the prior art.

The utility model provides an adjusting structure for linearly adjusting damping force of a shock absorber, which is arranged in the shock absorber and comprises a piston rod body, a first oil duct axially arranged in the piston rod body, a drainage channel penetrating through the side wall of the piston rod body and communicated with the first oil duct, and an adjusting valve core which is reciprocatingly arranged in the first oil duct and used for opening or closing the drainage channel; one end of the drainage channel, which is close to the first oil channel, is provided with a linear valve port, and the end part of the linear valve port is provided with an adjusting part which is used for enabling the opening degree to be linearly related to the liquid flow rate flowing through the linear valve port when the linear valve port is opened or closed.

Preferably, a first edge and a second edge are arranged on the linear valve port, and a stopping edge is arranged on the adjusting portion and is consistent with the first edge and the second edge in shape.

Preferably, the linear valve port is rectangular.

Preferably, the first oil passage includes a first passage through which the fluid passes, a second passage connected to the first passage and through which the regulating portion moves, and a third passage connected to the second passage.

Preferably, the second channel is clearance-fitted with the regulating portion.

Preferably, one end of the regulating part close to the first channel is a flat surface.

Preferably, the regulating valve core further comprises a rod part fixedly connected with the regulating part.

Preferably, the diameter of the shaft portion is larger than the diameter of the regulating portion.

Preferably, the drain passage includes an upper oil passage communicated with the first oil passage, and a lower oil passage symmetrically disposed about a central axis of the piston rod body.

The one-way circulation valve component for the shock absorber has the following beneficial effects:

1. the linear valve port is arranged on the drainage channel, the linear flow change of the fluid is realized by matching with the adjusting valve core, the most obvious factor influencing the damping force is the volume change of the fluid in unit time, in the process of opening or closing the linear valve port, the opening degree of the adjusting valve core is linearly related to the flow of the liquid flowing through the linear valve port, the larger the opening degree is, the flow is increased, the damping force is reduced, otherwise, the smaller the opening degree is, the damping force is increased, therefore, the adjusting valve core moves in the first oil channel, and the linear adjustment of the damping force can be realized.

2. According to the utility model, the adjusting valve core is arranged into the adjusting part and the rod part, and the adjusting part is in clearance fit with the second channel, so that the purpose of plugging the fluid is achieved, and the fluid is prevented from being plugged by additionally adding a sealing element, so that the structure is simple, and the manufacturing cost is reduced.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the utility model and together with the description, serve to explain the principles of the utility model. In the drawings, like reference numerals are used to indicate like elements. The drawings in the following description are directed to some, but not all embodiments of the utility model. For a person skilled in the art, other figures can be derived from these figures without inventive effort.

Fig. 1 is a schematic structural diagram of a damping control valve of a conventional shock absorber.

Fig. 2 is a graph showing the relationship between the leakage flow rate and the opening degree of a conventional damper control valve of a shock absorber.

Fig. 3 is a schematic structural diagram of an adjusting structure for linearly adjusting a damping force of a shock absorber according to an embodiment of the present invention.

Fig. 4 is an enlarged view of an internal structure of an adjusting structure for linearly adjusting a damping force of a shock absorber according to an embodiment of the present invention.

Fig. 5 is a schematic structural view of a linear valve port according to embodiment 1 of the present invention.

Fig. 6 is another structural schematic diagram of the linear valve port of embodiment 2 of the utility model.

In the figure, 1, a piston rod body; 2. a first oil passage; 201. a first channel; 202. a second channel; 203. a third channel; 3. adjusting the valve core; 301. an adjustment section; 301a, cut-off edge; 302. a rod portion; 4. a bleed passage; 401. an upper oil duct; 402. a lower oil duct; 5. a linear valve port; 501. a first edge; 502. a second edge.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. 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 invention. It should be noted that the embodiments and features of the embodiments in the present application may be arbitrarily combined with each other without conflict.

The first embodiment is as follows: as shown in fig. 3-4, which is only one embodiment of the present invention, the damper includes a piston rod body 1, a first oil passage 2 axially disposed in the piston rod body 1, a drain passage 4 penetrating through a sidewall of the piston rod body 1 and communicating with the first oil passage 2, and a regulator valve core 3 reciprocally disposed in the first oil passage 2 for opening or closing the drain passage 4; one end of the drain passage 4 near the first oil passage 2 is provided with a linear valve port 5, and an end of the linear valve port 5 is provided with a regulating portion 301 for linearly correlating the opening degree with the flow rate of the liquid flowing through the linear valve port 5 when the linear valve port 5 is opened or closed.

In the present invention, the linear valve port 5 is provided with a first edge 501 and a second edge 502, the regulating portion 301 is provided with a cut-off edge 301a, and the cut-off edge 301a is in accordance with the shape of the first edge 501 and the second edge 502.

Referring to fig. 5, the linear valve port 5 is rectangular, the first edge 501 and the second edge 502 are parallel straight lines, correspondingly, the stopping edge 301a is a straight line parallel to the first edge 501 and the second edge 502, and the planes of two edges of the linear valve port 5 adjacent to the first edge 501 and the second edge 502 are all flat planes; the opening degree of the regulating part 301 is ensured to be linearly related to the liquid flow rate flowing through the linear valve port 5 in the process of opening or closing the linear valve port 5.

Referring to fig. 6, the linear valve port 5 may also be triangular, the first edge 501 and the second edge 502 are adjacent straight lines, correspondingly, the cut-off edge 301a is a first cut-off edge 301a and a second cut-off edge 301a, and the first cut-off edge 301a and the second cut-off edge 301a are parallel to the first edge 501 and the second edge 502, respectively; the opening degree of the regulating part 301 is ensured to be linearly related to the liquid flow rate flowing through the linear valve port 5 in the process of opening or closing the linear valve port 5.

In addition, the linear valve port 5 may be formed in an irregular shape, and accordingly, an adjustment portion 301 for linearly correlating the opening degree with the flow rate of the liquid flowing through the linear valve port 5 is further provided. However, the shape of the linear valve port 5 and the shape of the adjusting portion 301 need to be calculated and obtained through experiments, and are not described herein.

The working principle of the adjusting structure for linearly adjusting the damping force of the shock absorber comprises the following steps: taking the compression working condition of the shock absorber as an example, the piston divides the fluid in the working cylinder into two parts, the piston rod body 1 drives the piston to move in the working cylinder, the volumes of the fluid in the two parts are changed, the two parts generate pressure difference, and the fluid needs to be compressed from the part with larger pressure

One part reaches balance from the first oil passage 2 and the leakage passage 4 in the piston hole and the piston rod body 1 to the other part with smaller pressure, the friction between the hole wall and the fluid and the friction in fluid molecules form damping force to vibration, and the most obvious factor influencing the damping force is the variation of the volume of the fluid in unit time; the drain channel 4 is set to be a rectangular groove and is matched with the regulating valve core 3 to realize linear flow change of fluid, so that the distance from the end part of the regulating valve core 3 to the piston is linearly related to the volume of the linear valve port 5 between the first oil channel 2 and the drain channel 4, the flow is increased and the damping force is reduced when the opening is larger, and otherwise, the damping force is increased when the opening is smaller, so that the regulating valve core 3 moves in the first oil channel 2, and the linear regulation of the damping force can be realized.

Example two: as shown in fig. 2 to 3, which are only one embodiment of the present invention, in an adjusting structure for linearly adjusting a damping force of a shock absorber, based on the first embodiment, a first oil passage 2 includes a first passage 201 through which a fluid passes, a second passage 202 connected to the first passage 201 and through which an adjusting portion 301 moves, and a third passage 203 connected to the second passage 202. The second passage 202 is clearance-fitted to the regulating portion 301 to achieve sealing between the second passage 202 and the regulating portion 301, thereby improving the regulating accuracy of the damping force.

The diameter of the rod part 302 is larger than that of the adjusting part 301, so that the stroke of the piston rod body 1 is limited conveniently.

The drain passage 4 includes an upper oil gallery 401 communicating with the first oil gallery 2, and a lower oil gallery 402 symmetrically disposed about the central axis of the piston rod body 1. The cross sections of the upper oil channel 401 and the lower oil channel 402 are rectangular, and the adjusting valve core 3 moves in the first oil channel 2, so that the linear adjustment of the damping force can be realized. It should be noted here that the upper oil channel 401 and the lower oil channel 402 may be asymmetrically arranged, and in this embodiment, in order to better ensure the strength of the part, the upper oil channel 401 and the lower oil channel 402 are symmetrically arranged.

The above-described aspects may be implemented individually or in various combinations, and such variations are within the scope of the present invention.

It should be noted that, in the description of the present application, it should be noted that the terms "upper end", "lower end" and "bottom end" indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the drawings or the orientation or positional relationship which the product of the application is usually placed in when the product of the application is used, and are only for convenience of describing the present application and simplifying the description, but do not indicate or imply that the device referred to must have a specific orientation, be constructed in a specific orientation and be operated, and thus, should not be construed as limiting the present application. Also, 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 identical elements in a process, method, article, or apparatus that comprises the element.

Finally, it should be noted that: the above examples are only for illustrating the technical solutions of the present invention, and are not limited thereto. Although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims

1. The utility model provides an adjust structure of linear adjustment bumper shock absorber damping force sets up in the bumper shock absorber, its characterized in that: the oil cylinder comprises a piston rod body (1), a first oil duct (2) axially arranged in the piston rod body (1), a drainage channel (4) penetrating through the side wall of the piston rod body (1) and communicated with the first oil duct (2), and an adjusting valve core (3) which is arranged in the first oil duct (2) in a reciprocating manner and used for opening or closing the drainage channel (4); one end of the drainage channel (4) close to the first oil channel (2) is provided with a linear valve port (5), and the end part of the linear valve port (5) is provided with an adjusting part (301) which is used for enabling the opening degree to be linearly related to the liquid flow passing through the linear valve port (5) when the linear valve port is opened or closed.

2. An adjusting structure for linearly adjusting a damping force of a shock absorber according to claim 1, wherein: the linear valve port (5) is provided with a first edge (501) and a second edge (502), the adjusting portion (301) is provided with a cut-off edge (301 a), and the cut-off edge (301 a) is consistent with the first edge (501) and the second edge (502) in shape.

3. An adjusting structure for linearly adjusting a damping force of a shock absorber according to claim 2, wherein: the linear valve port (5) is rectangular.

4. An adjusting structure for linearly adjusting a damping force of a shock absorber according to claim 1, wherein: the first oil channel (2) comprises a first channel (201) for fluid to pass through, a second channel (202) which is connected with the first channel (201) and is used for the adjustment part (301) to move, and a third channel (203) which is connected with the second channel (202).

5. An adjusting structure for linearly adjusting a damping force of a shock absorber according to claim 4, wherein: the second channel (202) is in clearance fit with the adjustment portion (301).

6. An adjusting structure for linearly adjusting a damping force of a shock absorber according to claim 1, wherein: one end of the adjusting part (301) close to the first channel (201) is a flat surface.

7. An adjusting structure for linearly adjusting a damping force of a shock absorber according to claim 1, wherein: the adjusting valve core (3) further comprises a rod part (302) fixedly connected with the adjusting part (301).

8. An adjusting structure for linearly adjusting a damping force of a shock absorber according to claim 7, wherein: the diameter of the rod part (302) is larger than that of the adjusting part (301).

9. An adjusting structure for linearly adjusting a damping force of a shock absorber according to claim 1, wherein: the leakage flow channel (4) comprises an upper oil channel (401) communicated with the first oil channel (2) and a lower oil channel (402) symmetrically arranged with the central axis of the piston rod body (1).