CN113719571A

CN113719571A - Vibration damper

Info

Publication number: CN113719571A
Application number: CN202111052144.8A
Authority: CN
Inventors: 姚仁杰; 周亚俊
Original assignee: Ningbo Hongyu Industry Co ltd
Current assignee: Ningbo Hongyu Industry Co ltd
Priority date: 2021-09-08
Filing date: 2021-09-08
Publication date: 2021-11-30
Anticipated expiration: 2041-09-08
Also published as: CN113719571B

Abstract

The invention relates to the technical field of vibration reduction equipment, in particular to a vibration reducer. The damping device comprises a first cylinder body, wherein a movable piston rod is arranged in the first cylinder body, the end part of the piston rod is provided with an amplitude control device, the amplitude control device comprises a damping block main body, the periphery of the damping block main body is provided with an extension part, one end of the extension part is provided with a first transition surface, and the other end of the extension part is provided with a second transition surface; the damping block main body and the extension part are made of rubber materials. Aiming at the technical problem that the traditional vibration absorber cannot attenuate the vibration with specific frequency, the rubber part is additionally arranged on the piston rod, so that the rubber part can attenuate the road surface vibration excitation within a specific frequency range, further reduce the vibration of a vehicle body and achieve the purpose of improving the riding comfort of passengers.

Description

Vibration damper

Technical Field

The invention relates to the technical field of vibration reduction equipment, in particular to a vibration reducer.

Background

The existing traditional shock absorber structure is not provided with a component for inhibiting the vibration of the piston rod within a specific frequency range, when the shock absorber receives the vibration input from a road surface within a specific range, the shock absorber cannot filter the vibration well, so that the piston rod in the shock absorber vibrates violently, the piston rod transmits the vibration to the vehicle body, the vehicle body further transmits the vibration to passengers in the vehicle, and the riding comfort of the passengers in the vehicle is finally influenced.

Disclosure of Invention

1. Technical problem to be solved by the invention

Aiming at the technical problem that the traditional vibration absorber cannot attenuate the vibration with specific frequency, the invention provides the vibration absorber, which is characterized in that a rubber part is additionally arranged on a piston rod, so that the vibration absorber can attenuate the road surface excitation within a specific frequency range, further reduce the vibration of a vehicle body and achieve the purpose of improving the riding comfort of passengers.

2. Technical scheme

In order to solve the problems, the technical scheme provided by the invention is as follows:

a shock absorber comprises a first cylinder body, wherein a movable piston rod is arranged in the first cylinder body, an amplitude control device is arranged at the end part of the piston rod, the amplitude control device comprises a damping block main body, an extension part is arranged on the periphery of the damping block main body, a first transition surface is arranged at one end of the extension part, and a second transition surface is arranged at the other end of the extension part; the damping block main body and the extension part are made of rubber materials.

Optionally, the bottom of the first cylinder body is provided with a matching portion, one end of the damping block main body is provided with a positioning portion, and the matching portion is matched with the positioning portion.

Optionally, a restoring valve system is arranged on the piston rod and comprises a first support, a first channel is arranged on the first support, a first spring plate group is arranged on one side of the first support, a first communicating portion is arranged on the first spring plate group, a first valve body is arranged on one side of the spring plate, a first liquid inlet channel and a first return channel are arranged on the first valve body, and a second spring plate group is arranged on one side of the first valve body.

Optionally, a compression valve system is arranged on the piston rod and comprises a second valve body, a third spring plate set is arranged on one side of the second valve body, a fourth spring plate set is arranged on the other side of the second valve body, a second communicating portion is arranged on the third spring plate set, and a second liquid inlet channel and a first return channel are arranged on the second valve body.

Optionally, the first valve body is peripherally provided with a first seal.

Optionally, a second cylinder is arranged outside the first cylinder, and oil is arranged in both the first cylinder and the second cylinder.

Optionally, a fixed block is arranged at the end of the first cylinder body, the fixed block is movably matched with the piston rod, and the fixed block is fixedly connected with the second cylinder body.

Optionally, a second sealing element is arranged at the end of the first cylinder, and the piston rod is movably matched with the second sealing element.

Optionally, the piston rod is in threaded fit with the damping block body.

Optionally, the piston rod end is provided with a mounting.

3. Advantageous effects

Compared with the prior art, the technical scheme provided by the invention has the following beneficial effects:

according to the shock absorber provided by the invention, the rubber part is additionally arranged on the piston rod, so that the shock excitation of the road surface in a specific frequency range can be attenuated, the vibration of the vehicle body is further reduced, and the aim of improving the riding comfort of passengers is fulfilled.

Drawings

Fig. 1 is a schematic structural diagram of a shock absorber according to an embodiment of the present invention.

Fig. 2 is an enlarged schematic view of a point a in fig. 1.

Fig. 3 is an enlarged schematic view of fig. 1 at B.

Fig. 4 is an enlarged schematic view at C in fig. 1.

Detailed Description

For a further understanding of the present invention, reference will now be made in detail to the embodiments illustrated in the drawings.

The present application will be described in further detail with reference to the following drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the relevant invention and not restrictive of the invention. It should be noted that, for convenience of description, only the portions related to the present invention are shown in the drawings. The terms first, second, and the like in the present invention are provided for convenience of describing the technical solution of the present invention, and have no specific limiting effect, but are all generic terms, and do not limit the technical solution of the present invention. It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being 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 invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are intended to be inclusive and mean, for example, that they may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art. The technical solutions in the same embodiment and the technical solutions in different embodiments can be arranged and combined to form a new technical solution without contradiction or conflict, and the technical solutions are within the scope of the present invention.

Example 1

With reference to fig. 1 to 4, the present embodiment provides a shock absorber, which includes a first cylinder 100, a movable piston rod 101 is disposed in the first cylinder 100, an end of the piston rod 101 is provided with an amplitude control device, the amplitude control device includes a damping block main body 102, an extension portion 103 is disposed on an outer periphery of the damping block main body 102, one end of the extension portion 103 is provided with a first transition surface 104, and the other end of the extension portion 103 is provided with a second transition surface 105; the damping block main body 102 and the extension part 103 are made of rubber.

The vibration damper of the present embodiment achieves vibration damping in a specific frequency range corresponding to different road surfaces with the amplitude control device at the end of the piston rod 101, thereby achieving vibration absorption and vibration reduction effects.

In this embodiment, the piston rod 101 reciprocates in the first cylinder 100, the amplitude control device is driven to move, and since the damping block main body 102 and the extension portion 103 are made of rubber, the rubber has flexibility, and is deformed by the oil pressure when moving along with the piston rod, but since the movement of the damping block main body lags behind the piston rod 101 all the time, the piston rod 101 receives a certain damping force when moving, and the amplitude control device plays a role in suppressing the movement of the piston rod 101.

In this embodiment, different motion suppression effects can be exerted on the piston rod 101 based on different rubber materials and performances and different sizes and volumes of the damping block main body 102 and the extension portion 103, and the selection of parameters such as the rubber materials, the sizes and volumes of the damping block main body 102 and the extension portion 103 can be actually adjusted according to the vibration frequency range. The selection of the rubber material is carried out corresponding to a specific vibration frequency range, the rubber material with proper hardness is selected, the size and the volume of the damping block main body 102 and the extension part 103 are adjusted, the selection of the rubber material and the size and the volume of the damping block main body 102 and the extension part 103 are adjusted, and multi-stage adjustment is formed together to realize targeted attenuation of vibration in the specific frequency range.

The amplitude control device of the embodiment has a simple structure, can be additionally installed on the basis of the existing shock absorber, can adjust the volume and hardness of rubber according to the vibration characteristics to be met by each shock absorber, or adjust the size and volume of the damping block main body 102 and the extension part 103, achieves the purpose of inhibiting the vibration amplitude of the piston rod 101 in a specific frequency range, and can reduce the motion impact of the piston rod 101 on a vehicle body when the shock absorber is applied to the vehicle body, thereby improving the riding comfort of passengers.

In this embodiment, one end of the extending portion 103 is provided with a first transition surface 104, the other end of the extending portion 103 is further provided with a second transition surface 105, and the first transition surface 104 and the second transition surface 105 are both inclined surfaces or curved surfaces matched with the flowing direction of the oil liquid. Because the extension part 103 needs to move in the first cylinder 100 along with the piston rod 101, there are two flowing directions for the movement of the oil liquid relative to the extension part 103, and in order to ensure that the oil liquid in the first cylinder 100 can still flow smoothly after the extension part 103 deforms, a first transition surface 104 and a second transition surface 105 are respectively arranged at two ends of the extension part 103 so as to conform to the flow of the oil liquid relative to the extension part 103, and thus, a flow guiding effect is achieved.

In this embodiment, the damping block main body 102 and the extension portion 103 are made of rubber, the rubber can deform under stress, and the rubber plays a role in vibration reduction and absorption within a specific frequency range, and in an extreme case, when the piston rod 101 has an excessively large range of motion and impacts the bottom of the first cylinder 100, the rubber can also play a role in buffering to protect the first cylinder 100.

As an optional implementation manner of this embodiment, the bottom of the first cylinder 100 is provided with a matching portion 107, one end of the damping block main body 102 is provided with a positioning portion 106, and the matching portion 107 matches with the positioning portion 106. In the present embodiment, in order to ensure that the damping block main body 102 does not block the oil flowing space of the compression valve system when touching the bottom of the first cylinder body 100, the bottom of the first cylinder body 100 is provided with the matching portion 107, the end of the damping block main body 102 is provided with the positioning portion 106, the matching portion 107 can be generally a convex block, the positioning portion 106 can be a concave cavity arranged on the damping block main body 102, and the convex block is matched with the concave cavity, so that the positioning function of the damping block main body 102 is realized, and the oil flowing space of the compression valve system is prevented from being blocked by the positioning portion 106.

As an optional implementation manner of this embodiment, a restoring valve system is disposed on the piston rod 101, the restoring valve system includes a first bracket 111, a first channel 113 is disposed on the first bracket 111, a first spring plate set 112 is disposed on one side of the first bracket 111, a first communicating portion 114 is disposed on the first spring plate set 112, a first valve body 115 is disposed on one side of the spring plate, a first liquid inlet channel 116 and a first return channel 117 are disposed on the first valve body 115, and a second spring plate set 118 is disposed on one side of the first valve body 115.

The restoring valve system of the present embodiment is used for providing a damping force to the piston rod 101 when the piston rod 101 retracts or extends, so as to suppress the large-amplitude movement of the piston rod 101, and perform the vibration suppressing and absorbing functions.

When the piston rod 101 retracts in the first cylinder 100, the oil on one side of the first valve body 115 is compressed, the oil flows through the first return passage 117 and overcomes the elastic force of the first spring plate set 112 to flow to the other side of the first valve body 115, in the process, the oil narrows when flowing through the first return passage 117 and needs to overcome the elastic force of the first spring plate set 112, so that the flow of the oil is blocked, and a damping force is provided for the piston rod 101, thereby achieving the effects of vibration suppression and absorption.

When the piston rod 101 extends out of the first cylinder 100, negative pressure occurs at one side of the amplitude control device, oil flows into a negative pressure area from one side of the first valve body 115, which is far away from the amplitude control device, in the process, the oil firstly flows into the first liquid inlet channel 116 through the first channel 113, and then the oil overcomes the action of oil pressure, and the second spring plate set 118 flows into the negative pressure area, in the process, the oil needs to flow through the first channel 113 and the first liquid inlet channel 116, the flow channel is narrowed, and the elastic force of the second spring plate set 118 needs to be overcome, so that the flow of the oil is blocked, and the damping force is provided for the piston rod 101, and the vibration suppression and absorption effects are achieved.

As an optional implementation manner of this embodiment, a compression valve train is disposed on the piston rod 101, the compression valve train includes a second valve body 120, a third spring set 121 is disposed on one side of the second valve body 120, a fourth spring set 122 is disposed on the other side of the second valve body 120, a second communicating portion 123 is disposed on the third spring set 121, and a second liquid inlet channel 124 and a first return channel 125 are disposed on the second valve body 120.

The compression valve system of the present embodiment is used for providing a damping force to the piston rod 101 when the piston rod 101 retracts or extends, so as to suppress a large-amplitude movement of the piston rod 101, and perform vibration suppression and absorption functions.

When the piston rod 101 retracts in the first cylinder 100, the oil in the first cylinder 100 is compressed, the oil flows through the second liquid inlet channel 124, and flows out against the elastic force of the fourth spring plate group 122, in the process, the flow channel of the oil is narrowed when the oil flows through the second liquid inlet channel 124, and the elastic force of the fourth spring plate group 122 needs to be overcome, so that the flow of the oil is blocked, a damping force is provided for the piston rod 101, and the vibration suppression and absorption effects are achieved.

When the piston rod 101 extends out of the first cylinder 100, negative pressure is generated in the first cylinder 100, and oil flows through the first return passage 125 and flows into the first cylinder 100 against the elastic force of the third spring plate set 121, in the process, the oil needs to flow through the first return passage 125, the flow passage is narrowed, and the elastic force of the third spring plate set 121 needs to be overcome, so that the flow of the oil is blocked, and a damping force is provided for the piston rod 101, thereby achieving the effects of vibration suppression and absorption.

As an alternative embodiment of this embodiment, the first valve body 115 is provided with a first sealing member 109 on its outer periphery. In order to ensure the sealing performance of the restoring valve system moving with the piston rod 101 in the first cylinder 100 and ensure that the oil can only flow through the restoring valve system, a first sealing member 109 may be disposed on the outer periphery of the first valve body 115 to prevent the oil from overflowing and leaking, which affects the working effect of the restoring valve system.

Example 2

The embodiment provides a shock absorber, which can be improved on the basis of the embodiment 1 as follows: a second cylinder 108 is arranged outside the first cylinder 100, and oil is arranged in both the first cylinder 100 and the second cylinder 108.

In this embodiment, the first cylinder 100 is a working cylinder, and the flow of the internal oil is controlled to achieve the effects of vibration absorption and vibration reduction, but since the oil needs to flow out of the first cylinder 100 and is easily taken out of the first cylinder 100 along with the movement of the piston rod 101, so as to cause loss, the second cylinder 108 may be disposed outside the first cylinder 100, a part of the oil is stored in the second cylinder 108 and is communicated with the first cylinder 100, the oil in the first cylinder 100 may flow into the second cylinder 108, and the oil in the second cylinder 108 may also supplement the loss of the oil in the first cylinder 100.

As an optional implementation manner of this embodiment, a fixed block 119 is disposed at an end of the first cylinder 100, the fixed block 119 is movably engaged with the piston rod 101, and the fixed block 119 is fixedly connected to the second cylinder 108. In this embodiment, in order to ensure the stable connection between the end portions of the first cylinder 100 and the second cylinder 108, a fixing block 119 is disposed at the end portion of the first cylinder 100 and is matched with the end portions of the first cylinder 100 and the second cylinder 108, so that the two cylinders are connected to each other, and further, the fixing block 119 can also play a certain sealing role to prevent oil in the first cylinder 100 and the second cylinder 108 from leaking out. In addition, in this embodiment, in order to ensure the movement of the piston rod 101, the piston rod 100 can move freely in the through hole of the fixing block 119, and the arrangement of the fixing block 119 can prevent the oil in the first cylinder 100 from being brought out along with the movement of the piston rod 101 to a certain extent.

As an alternative embodiment of this embodiment, the end of the first cylinder 100 is provided with a second seal 110, and the piston rod 101 is movably engaged with the second seal 110. In this embodiment, since the oil is easily taken out from the first cylinder 100 when the piston rod 101 moves, in order to minimize the loss of the oil, the second sealing member 110 may be disposed at the end of the first cylinder 100, so as to reduce the outflow of the oil by the sealing function of the second sealing member 110.

In addition, the second sealing element 110 may be fixed to the second cylinder 108 to further achieve the sealing function of the oil in the second cylinder 108, that is, the second sealing element 110 may simultaneously perform the sealing function of the first cylinder 100 and the second cylinder 108.

As an alternative embodiment of this embodiment, the piston rod 101 and the damping block body 102 are in threaded fit. In this embodiment, the piston rod 101 and the damping block main body 102 are in threaded fit, so that the amplitude control device can be flexibly installed in the shock absorber, and can be installed on the basis of the existing shock absorber, thereby improving the convenience of use.

As an alternative embodiment of this embodiment, the end of the piston rod 101 is provided with a mounting portion. In this embodiment, the end of the piston rod 101 may be provided with an installation portion such as a thread and a connection member, so as to facilitate the adaptation of the shock absorber to an installation position such as a vehicle body, and realize the installation of the shock absorber.

The present invention and its embodiments have been described above schematically, without limitation, and what is shown in the drawings is only one of the embodiments of the present invention, and the actual structure is not limited thereto. Therefore, if the person skilled in the art receives the teaching, without departing from the spirit of the invention, the person skilled in the art shall not inventively design the similar structural modes and embodiments to the technical solution, but shall fall within the scope of the invention.

Claims

1. A shock absorber is characterized by comprising a first cylinder body, wherein a movable piston rod is arranged in the first cylinder body, an amplitude control device is arranged at the end part of the piston rod, the amplitude control device comprises a damping block main body, an extension part is arranged on the periphery of the damping block main body, a first transition surface is arranged at one end of the extension part, and a second transition surface is arranged at the other end of the extension part; the damping block main body and the extension part are made of rubber materials.

2. The shock absorber according to claim 1, wherein the bottom of the first cylinder is provided with a fitting portion, and one end of the damping block main body is provided with a positioning portion, and the fitting portion is fitted with the positioning portion.

3. The shock absorber according to claim 2, wherein the piston rod is provided with a restoring valve system, the restoring valve system comprises a first support, the first support is provided with a first passage, one side of the first support is provided with a first spring plate group, the first spring plate group is provided with a first communicating portion, one side of the spring plate is provided with a first valve body, the first valve body is provided with a first liquid inlet passage and a first return passage, and one side of the first valve body is provided with a second spring plate group.

4. The shock absorber according to claim 1, wherein a compression valve train is disposed on the piston rod, the compression valve train includes a second valve body, a third spring set is disposed on one side of the second valve body, a fourth spring set is disposed on the other side of the second valve body, a second communicating portion is disposed on the third spring set, and a second inlet channel and a first return channel are disposed on the second valve body.

5. A shock absorber according to claim 3, wherein said first valve body is peripherally provided with a first seal.

6. The shock absorber according to claim 1, wherein a second cylinder is disposed outside the first cylinder, and oil is disposed in both the first cylinder and the second cylinder.

7. The shock absorber according to claim 6, wherein a fixed block is arranged at the end of the first cylinder body, the fixed block is movably matched with the piston rod, and the fixed block is fixedly connected with the second cylinder body.

8. A shock absorber according to claim 1, wherein said first cylinder end is provided with a second seal, said piston rod being in movable engagement with said second seal.

9. A shock absorber according to claim 1, wherein said piston rod is threadedly engaged with said damping mass body.

10. A shock absorber according to claim 1, wherein the piston rod end is provided with a mounting portion.