CN219242545U - A shock absorber and a shock absorber assembly with variable stiffness - Google Patents

Abstract

The present application provides a variable stiffness shock absorber and a shock absorber assembly. The shock absorber includes a first shock absorber and a second shock absorber surrounding the periphery of the first shock absorber. The first shock absorber and the second shock absorber There is a connecting body between the vibration-damping bodies, the first vibration-damping body and the second vibration-damping body are connected through the connecting body, the connecting body has a first deformation space, the first vibration-damping body has a vibration-damping side, and the vibration-damping side is connected to the second vibration-damping body. There is a second deformation space between the top walls of the vibration body. Release the deformation of the second damper through the first deformation space, reduce the tearing effect caused by deformation, and ensure the damping performance of the shock absorber; the top wall of the second damper is higher than the top wall of the first damper, When receiving a large impact, the axial deformation of the second damping body is resisted by the first damping body and the connecting body, approaching the top wall of the first damping body in the vertical direction, passing through the second damping body Rigidity increases during deformation, and the first damping body abuts against the damped body at the same time, improving the reliability of the shock absorber.

Description

A shock absorber and a shock absorber assembly with variable stiffness

technical field

The present application relates to the technical field of engines, in particular to a variable stiffness shock absorber and a shock absorber assembly.

Background technique

The vibration isolation and anti-shock design of the engine and some parts is an important part to ensure the reliable operation of the powertrain system or parts. ) application is universal and necessary, among which rubber damping pads are the most widely used.

However, for engineering machinery vehicles such as bulldozers, excavators, loaders, etc., the complex and harsh environment of use causes the suspension system to bear more and greater low-frequency impact loads, which affects the vibration reduction performance and reliability of the suspension structure. Higher requirements are put forward for the performance, that is, higher requirements are put forward for the vibration damping ability of the shock absorber under different use environments and different vibration amplitudes. Most of the shock absorbers in the prior art directly use bolts to install the shock absorber at the damped part to reduce vibration. However, in order to ensure that the post-processing system of construction machinery vehicles is To ensure its high reliability in the environment, the only way to sacrifice the vibration damping performance is to increase the stiffness of the vibration damping pad. However, the reduction of vibration damping performance also brings the vibration deterioration of the protected structure and reduces the service life.

In this regard, some existing technologies have begun to use variable stiffness shock absorbers, and the up and down movement of the shock absorber is realized by setting a lifting mechanism and an auxiliary spring, so that the shock absorber moves to different working areas to cope with different working conditions; however, The structure of the shock absorber in the prior art is too complicated, which requires a large number of cylinders, pistons, springs and other structures, and requires a large number of modifications to the original structure of the shock absorber. The structure is complex, the displacement is large, and it will occupy a large amount of working space, greatly increasing the cost.

Therefore, the prior art needs to be further improved and improved.

Utility model content

The present application provides a variable stiffness shock absorber and a shock absorber assembly to solve the problem that the structure of the shock absorber in the prior art is complex, it is difficult to ensure the vibration damping ability under different working conditions, and the original shock absorber needs to be changed. material and structure issues.

The technical scheme adopted in this application is:

The present application provides a variable stiffness shock absorber, the shock absorber includes a first shock absorber and a second shock absorber surrounding the periphery of the first shock absorber, the first shock absorber and the second shock absorber There is a connecting body between them, the first damping body and the second damping body are connected through the connecting body, the connecting body has a first deformation space, the first damping body has a damping side, and the damping side and the second damping body There is a second deformation space between the top walls.

As a preferred embodiment of the present application, there are multiple connecting bodies arranged at intervals along the circumferential direction of the first damping body, and a third deformation space is provided between two adjacent connecting bodies.

As a preferred embodiment of the present application, the connecting body and the first damping body are integrally formed, and are arranged on the outer wall of the first damping body; or, the connecting body and the second damping body are integrally formed. , and set on the inner wall of the second damping body.

As a preferred embodiment of the present application, the connection body includes a plurality of connection blocks, the plurality of connection blocks are evenly arranged, and a first deformation space is formed between two adjacent connection blocks.

As a preferred embodiment of the present application, the stiffness of the first damping body is k2, and the stiffness of the second damping body is k1, wherein k2≥10×k1.

As a preferred embodiment of the present application, the shock absorber is provided with a positioning portion protruding from the bottom wall of the first shock absorber, and a fixing hole penetrating through the positioning portion.

As a preferred embodiment of the present application, a transition section is provided between the top walls of the first damping body and the second damping body, and the diameter of the transition section is larger than the diameter of the first damping body.

The application also provides a vibration damping assembly, the vibration damping assembly includes a shock absorber, and a support structure, the shock absorber is symmetrically arranged on both sides of the support structure, and the vibration damping side of the first vibration damping body is away from each other, the vibration damping The device includes a positioning portion protruding from the bottom wall of the second vibration-absorbing body, and a fixing hole passing through the positioning portion.

As a preferred embodiment of the present application, the supporting structure is provided with a positioning hole, the positioning part is placed in the positioning hole, and is in clearance fit with the positioning hole, and the positioning hole and the fixing hole form a fixing channel.

As a preferred embodiment of the present application, the shock absorber assembly further includes a protective piece, the protective piece includes an insertion part and a support part, the insertion part is placed in the fixing channel, and the support part is used to support one of the two shock absorbers support, and the other of the two abuts against the damped body.

Owing to adopting above-mentioned technical scheme, the technical effect that this application obtains is:

1. This application uses the second damping body to perform vibration damping work under normal working conditions, which ensures stable operation to a large extent. Through the first deformation space set on the connecting body, the second vibration damping body can withstand low frequency and high impact When extrusion deformation occurs, the deformed part can enter the first deformation space, releasing the deformation of the second damping body, reducing the tearing effect caused by deformation, so as to ensure the vibration damping performance of the shock absorber under low frequency and high impact; And the first damping body has a damping side, and there is a second deformation space between the damping side and the top wall of the second damping body, which can make the second damping body work under severe working conditions. Compressed by the extrusion of the damping body, the axial deformation of the second damping body is resisted by the first damping body and the connecting body, the second damping body can undergo compression deformation in the vertical direction, and move toward the first damping body The top wall of the vibrating body approaches and disperses in the second deformation space until it is flush with the top wall of the first vibration-absorbing body, so as to be compatible with the first vibration-absorbing body through the increase in stiffness when the second vibration-absorbing body deforms. The body is in contact with the damped body at the same time to prevent further deformation of the shock absorber and improve the reliability of the shock absorber. That is to say, the application can When the vibration of the damped body is low, it has a high damping capacity, and when the vibration is large, the reliability of the shock absorber is improved through the change of stiffness, and this application only uses the deformation of the second damping body The amount is used to adapt to the different vibrations under different working conditions, and the rubber material of the vibration damping body itself is not changed. The structure is simple and the cost is low.

2. As a preferred embodiment of the present application, there are multiple connecting bodies of the present application, and a third deformation space is formed between two adjacent connecting bodies, which can further prevent the sudden change of the second damping body, and further The compression deformation of the second damping body is released to reduce the tearing effect caused by the deformation. In addition, the connecting body is integrally formed with the first damping body, or integrally formed with the second damping body, which can facilitate the processing and production of the shock absorber and save processing costs, and through the integrally formed structure, the connecting body includes A plurality of connection blocks, and the first deformation space is formed between adjacent connection blocks, and the vertical interval of the first deformation space and the lateral interval of the second deformation space are realized through the simple structure of the connection body to cooperate with vibration reduction.

3. As a preferred embodiment of the present application, the present application sets the material hardness of the first damping body and the second damping body to be different, so that the stiffness k1 of the second damping body is smaller than that of the first damping body The stiffness k2 can transfer the deformation to the first damper with higher stiffness when the second damper is deformed due to vibration, so as to resist the deformation of the second damper, so as to improve the overall performance of the damper. Anti-deformation ability, and enables the deformation of the second damping body to move to the second deformation space, that is, the top of the first damping body, so that the top wall of the second damping body is close to the first vibration under high vibration conditions A vibration damping body, so that the first vibration damping body and the second vibration damping body jointly damp the vibration of the damped body, and increase the rigidity through deformation, thereby improving the overall reliability.

4. This application also provides a vibration damping assembly, by setting the vibration damper symmetrically arranged on both sides of the support structure, so that the body to be damped, the vibration damper, the support structure and another vibration damper are stacked, which can improve the vibration reduction. vibration effect, and the shock absorber is arranged on both sides of the support structure, and when the vibration at the support structure is transmitted upwards and downwards, it needs to be buffered and damped by the shock absorber, so as to further improve the vibration reduction vibration effect.

5. As a preferred embodiment of the present application, the supporting structure of the present application is provided with a positioning hole, through the cooperation of the positioning part and the positioning hole, the shock absorber can be positioned axially through the protruding structure of the positioning part, and The clearance fit between the positioning hole and the positioning part can prevent the direct contact between the positioning part and the support structure to a large extent, and improve the radial shock absorption capacity. In addition, the present application is also provided with a protective piece, the protective piece includes an insertion part and a support part, and the support part of the protection piece can support the shock absorber, which is convenient for the assembly of the whole structure. The fixing channel inside the vibrating body plays a certain protective role, which can increase the hardness of the fixing hole of the first damping body and prevent the locking member from being directly inserted into the first damping body to cause damage to it.

Description of drawings

The accompanying drawings described here are used to provide a further understanding of the utility model and constitute a part of the utility model. The schematic embodiments of the utility model and their descriptions are used to explain the application and do not constitute improper limitations to the utility model. In the attached picture:

FIG. 1 is a schematic structural view of a shock absorber in an embodiment provided by the present application;

Fig. 2 is a schematic diagram of the explosion structure of the shock absorber in an embodiment provided by the present application;

Fig. 3 is a schematic cross-sectional structure diagram of a shock absorber in an embodiment provided by the present application;

Fig. 4 is a schematic cross-sectional structure diagram of a shock absorbing assembly in an embodiment provided by the present application.

Reference signs:

1-first damping body; 2-second damping body; 21-transition section; 3-connecting body; 31-connecting block; 4-damped body; 5-first deformation space; 51-second deformation Space; 6-third deformation space; 7-positioning part; 8-supporting structure; 9-protecting part; 91-inserting part; 92-supporting part;

Detailed ways

In order to explain the overall concept of the present application more clearly, the following detailed description will be given by way of examples in combination with the accompanying drawings.

In the following description, many specific details are set forth in order to fully understand the application, but the application can also be implemented in other ways different from those described here, therefore, the protection scope of the application is not limited by the specific details disclosed below. EXAMPLE LIMITATIONS.

In addition, in the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of description The present application and simplified descriptions do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operate in a particular orientation, and thus should not be construed as limiting the present application.

In this application, terms such as "installation", "connection", "connection" and "fixation" should be interpreted in a broad sense, for example, it can be a fixed connection or a detachable connection, unless otherwise clearly specified and limited. , or integrated; it can be a mechanical connection, an electrical connection, or a communication; it can be a direct connection or an indirect connection through an intermediary, it can be the internal communication of two components or the interaction relationship between two components . Those of ordinary skill in the art can understand the specific meanings of the above terms in this application according to specific situations.

In the description of this specification, descriptions referring to the terms "one embodiment", "some embodiments", "example", "specific examples", or "some examples" mean that specific features described in connection with the embodiment or example , structure, material or characteristic is included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the described specific features, structures, materials or characteristics may be combined in any suitable manner in any one or more embodiments or examples.

As shown in Figures 1 to 4, the present application provides a variable stiffness shock absorber, the shock absorber includes a first shock absorber 1 and a second shock absorber 2 surrounding the outer periphery of the first shock absorber 1 , there is a connecting body 3 between the first damping body 1 and the second damping body 2, the first damping body 1 and the second damping body 2 are connected through the connecting body 3, and the connecting body 3 has a first deformation space 5, The first damping body 1 has a damping side, and there is a second deformation space 51 between the damping side and the top wall of the second damping body 2 .

Specifically, when the working condition of the damped body 4 is relatively stable, the vibration at the damped body 4 is low, and the vibration will be transmitted to the shock absorber. At this time, the second vibration damper 2 will be squeezed Or the vibration is deformed, because the vibration is low and the deformation is small, the deformed part can enter the first deformation space 5, release the deformation of the second damping body 2, and reduce the tearing effect caused by deformation, so that the deformation can be achieved under low impact Guarantee the damping performance of the shock absorber.

Furthermore, when the shock absorber is in a relatively complex and harsh working condition, the second shock absorber 2 will continue to deform due to relatively large vibration or extrusion. At this time, due to the impact of the first deformation space 5 on the deformation release and the resistance of the first damping body 1, so as to resist the axial deformation of the second damping body 2, and deform to the second deformation space 51 after the second damping body 2 is squeezed, so that the first The top wall of the shock absorbing body 1 and the top wall of the second shock absorbing body 2 are gradually approached so as to abut against the damped body 4 through the first shock absorbing body 1 and the second shock absorbing body 2, and due to The deformation of the second shock absorber 2 increases the stiffness of the shock absorber, thereby improving the overall stability and reliability of the shock absorber.

That is to say, in this application, the second vibration damping body 2 is used as the main vibration damping body under normal working conditions and complicated and severe working conditions to carry out the vibration damping operation, and the first vibration damping body 1 is used as the auxiliary vibration damping body to cooperate The second damping body improves the damping effect and reliability of the shock absorber, and resists the deformation of the second damping body 2 through the first damping body 1 and the connecting body 3 .

Wherein, as shown in Fig. 2, a plurality of connectors 3 are provided, and a plurality of connectors can be evenly spaced in the circumferential direction, and a third deformation space 6 is formed between adjacent connectors 3, so that the third deformation space 6 The size is the same, making the vibration damping effect more stable. The application does not specifically limit the arrangement of the connecting body 3, that is, the connecting body 3 can be integrally formed with the first damping body 1, and is arranged on the outer wall of the first damping body 1; it can also be set as a connection The body 3 and the second damping body 2 are integrally formed, and are arranged on the inner wall of the second damping body.

Further, as shown in Figure 1, Figure 2 and Figure 3, in order to facilitate the description of the subsequent structure, this application will describe the structure in which the connecting body 3 and the first damping body 1 are integrally formed. The connection body 3 can include a plurality of connection blocks 31, and the plurality of connection blocks 31 are evenly arranged, which can be evenly arranged in the vertical direction, or evenly arranged in a ring, and formed between adjacent connection blocks 31. The first deformation space 5.

That is to say, the present application uses the first deformation space 5, the second deformation space 51 and the third deformation space 6 to prevent the sudden change of the second damper 2, further release the compression deformation of the second damper 2, and reduce the deformation caused by deformation. resulting tearing effect. In addition, the connecting body 3 is formed integrally with the first damping body 1, or integrally formed with the second damping body 2, which can facilitate the processing and production of the shock absorber, save processing costs, and through the integrally formed structure, set The connection body 3 includes a plurality of connection blocks 31, and the first deformation space 5 is formed between adjacent connection blocks 31, and the vertical interval of the first deformation space 5 and the third deformation space 6 are realized by the simple structure of the connection body 3 The horizontal spacing to match the vibration reduction.

Further, as shown in Figure 3, a transition section 21 is provided between the top walls of the first damping body 1 and the second damping body 2, and the diameter of the transition section 21 is larger than the diameter of the first damping body 1, as shown in Figure 3 As shown, the transition section 21 is a chamfer extending from the top wall of the first vibration-absorbing body 1 to the top wall of the second vibration-damping body 2, which can make the second vibration-absorbing body 2 Deform to the first deformation space 5, and further slow down the tearing effect of deformation through the setting of the transition section 21, and enable the deformation of the second damping body 2 to move to the first damping body 1 along the transition section 21 Guidance can not only increase the contact area between the deformation part and the damped body 4, but also reduce the gap between the first damper 1 and the second damper 2, further improving the reliability and stability of the damper sex.

As a preferred embodiment of the present application, the stiffness of the first damping body 1 is k2, the stiffness of the second damping body 2 is k1, and the stiffness relationship between the two is k2≥10×k1, so that the first The stiffness k1 of the second damping body 2 is smaller than the stiffness k2 of the first damping body 1, and when the second damping body 2 is deformed due to vibration, the deformation can be transmitted to the first damping body 1 with higher stiffness, To resist the deformation of the first damping body 1, so as to improve the overall anti-deformation capability of the shock absorber, and enable the deformation of the second damping body 2 to compress and move in the vertical direction, so that it can be used under the condition of large vibration Make the top wall of the second damper 2 close to the top wall of the first damper 1, so that the first damper 1 and the second damper 2 jointly damp the vibration of the damped body 4, And the stiffness is improved through deformation, thereby improving the overall reliability performance.

It can be understood that the first vibration damping body 1, the second vibration damping body 2 and the connecting body 3 of the present application are all made of rubber, but their hardness is different, so that the first damping body with lower hardness and better vibration damping effect can be used. The second damping body 2 is used for the main damping operation, and the first damping body 1 with higher hardness is used for protection and resistance operations. That is to say, this application does not change the materials of the first damper 1 and the second damper 2, that is, the materials of the first damper 1 and the second damper 2 can be the most conventional rubber dampers. The vibrating body is used for vibration reduction, the processing cost is low, and the assembly is also simpler.

In addition, there is a certain distance between the first damping body 1 and the second damping body 2 provided in the present application. The present application determines the stiffness k1 of the second damping body 2 and the height h1 of the second damping body 2 , to determine the stiffness k2 and height h2 of the first damping body 1, and based on the constant quantity that can be measured or known, that is, the acceleration of gravity g; the anti-shock coefficient γ; The resulting acceleration root mean square value a0; the dynamic and static stiffness ratio α, and the static vibration damping pad deformation β generated by the bolt pre-tightening force are obtained through the formula: δ=(mg+γma0)/(α×k1)+β The height difference δ between the first damping body 1 and the second damping body 2 is determined, so as to complete the processing and assembly of the first damping body 1 and the second damping body 2 .

As shown in Figure 2 and Figure 3, as a preferred embodiment of the present application, the rubber damping body is provided with a positioning portion 7 that protrudes from the bottom wall of the first damping body 2 and penetrates through the positioning portion 7 and the first damping body. 1 Fixing hole in the center. The positioning part 7 can be used to position the main vibration damper, and the radial vibration damping capability can be improved.

As shown in Figure 4, the present application also provides a damping assembly, the damping assembly includes a shock absorber and a support structure 8, the shock absorber is symmetrically arranged on both sides of the support structure 8, and the first shock absorber 1 The damping side faces away from each other.

It can be understood that, for the arrangement of the shock absorber and the support structure 8, it can also be set that the shock absorber is arranged on both sides of the damped body 4, that is to say, the present application uses the shock absorber, the support mechanism and the damped Vibrator 4, so that the three are arranged in a stacked arrangement, which can improve the shock absorption effect; in order to facilitate the description of the subsequent structure, this application uses the arrangement of the shock absorber on both sides of the support mechanism as an example to describe, Moreover, the shock absorbers are arranged on both sides of the support structure 8, and the vibration at the support structure 8 can also be transmitted upwards and downwards through the shock absorbers, further improving the vibration reduction effect.

Further, as shown in FIG. 4 , the supporting structure 8 is provided with a positioning hole, and the positioning part 7 is placed in the positioning hole. It can be understood that the diameter of the positioning part 7 can be smaller than the diameter of the first damping body 1, and is compatible with the positioning part 7. The hole clearance fits, and the positioning hole and the fixing hole form a fixing channel. Optionally, the positioning part 7 and the positioning hole can be clearance fit, the shock absorber can be positioned axially through the protruding structure of the positioning part 7, and the clearance fit between the positioning hole and the positioning part 7 can be used to a large extent. The upper house positioning part 7 is in direct contact with the supporting structure 8 to improve the radial shock absorption capacity.

In addition, as shown in FIG. 4 , the shock absorber assembly also includes a protection member 9, the protection member 9 includes an insertion portion 91 and a support portion 92, the insertion portion 91 is placed in the fixing channel, and the support portion 92 is used for the two shock absorbers. One of the two is supported, and the other of the two is in contact with the damped body 4 . Optionally, the insertion part 91 and the support part 92 may be integrally formed, so as to facilitate the processing of the protection part 9 and simplify the assembly and disassembly process.

In the present application, the support part 92 of the protector 9 can support the shock absorber, which facilitates the assembly of the entire structure. The setting of the insertion part 91 can protect the fixed channel inside the main shock absorber to a certain extent, and can improve The hardness of the fixing hole of the first damping body 1 prevents the locking member 93 from being directly inserted into the first damping body to cause damage to it.

As a preferred embodiment of the present application, the damping assembly further includes a locking piece 93 and a fastener 94, the locking piece 93 penetrates the protection piece 9 and the damped body 4, and locks the lock through the fastener 94. Fastener 93 is positioned.

Optionally, the locking member 93 and the fastening member 94 may be configured as bolts and nuts, so as to simplify the overall structure and facilitate the disassembly and assembly of the vibration damping assembly.

Places not mentioned in this application can be realized by adopting or referring to existing technologies.

Each embodiment in this specification is described in a progressive manner, the same and similar parts of each embodiment can be referred to each other, and each embodiment focuses on the differences from other embodiments.

The above are only examples of the present application, and are not intended to limit the present application. For those skilled in the art, various modifications and changes may occur in this application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included within the scope of the claims of the present application.

Claims (10)

1. The utility model provides a variable rigidity's shock absorber, its characterized in that, the shock absorber include first damping body and encircle in the second damping body of first damping body periphery, first damping body with have the connector between the second damping body, first damping body with the second damping body passes through the connector is connected, the connector has first deformation space, first damping body has the damping side, damping side with have the second deformation space between the roof of second damping body.

2. The variable stiffness vibration absorber of claim 1 wherein said plurality of connectors are circumferentially spaced about said first vibration absorber, and wherein a third deformation space is provided between adjacent ones of said connectors.

3. The variable stiffness vibration absorber of claim 2 wherein said connector is of unitary construction with said first vibration absorber and is disposed on an outer wall of said first vibration absorber; or the connecting body and the second vibration reduction body are of an integrally formed structure and are arranged on the inner wall of the second vibration reduction body.

4. The variable stiffness vibration damper of claim 1 wherein said connector includes a plurality of connector blocks, said plurality of connector blocks being uniformly arranged, adjacent ones of said connector blocks defining said first deformation space therebetween.

5. A variable stiffness vibration absorber according to claim 1 wherein said first vibration dampening body has a stiffness of k2 and said second vibration dampening body has a stiffness of k1, wherein k2 is greater than or equal to 10 x k1.

6. A variable stiffness vibration damper according to claim 1, wherein the vibration damper is provided with a positioning portion protruding from a bottom wall of the first vibration damper body, and a fixing hole penetrating the positioning portion.

7. A variable stiffness vibration damper as claimed in claim 1 wherein a transition section is provided between the top walls of the first and second vibration damping bodies, the transition section having a diameter greater than the diameter of the first vibration damping body.

8. A vibration damping assembly, characterized in that the vibration damping assembly comprises a vibration damper according to any one of claims 1-7 and a supporting structure, wherein the vibration dampers are symmetrically arranged on two sides of the supporting structure, the vibration damping sides of the first vibration damping body are away from each other, and the vibration damper comprises a positioning part protruding out of the bottom wall of the first vibration damping body and a fixing hole penetrating through the positioning part.

9. A vibration damping assembly according to claim 8, wherein the support structure is provided with a locating hole, the locating portion being disposed in the locating hole and being in clearance fit with the locating hole, the locating hole and the fixing hole forming a fixing channel.

10. A vibration damper assembly according to claim 9, further comprising a protector member including an insert portion disposed in the fixed passage and a support portion for supporting one of the two vibration dampers, the other of the two vibration dampers being in abutment with the body to be damped.

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