阅读说明：本技术 一种整体桥式悬架 (Integral bridge type suspension ) 是由 周磊磊 陈健 王晓军 付良军 张奇奇 洪学臣 李祥喜 叶飞 高建光 黄从奎 汪中 于 2021-08-12 设计创作，主要内容包括：本发明公开了一种整体桥式悬架,其单片式钢板弹簧对称安装在车桥的宽度方向的两侧；两个减振器分别位于车桥的前侧和后侧,减振器的两端分别与车桥和车体相连接；弹性支撑单元内设有轴向通孔,弹性支撑单元的外壁面上设有环状凸起,弹性支撑单元与单片式钢板弹簧的中间区域对应设置,且弹性支撑单元的轴向方向的一端面与单片式钢板弹簧或车体相连接,弹性支撑单元的轴向方向的另一端面与单片式钢板弹簧或车体相对应。本公开提供的整体桥式悬架通过单片簧和弹性支撑单元的设计,降低了悬架重量,提高了经济性和操控性能。而且,本公开的整体桥式悬架可根据不同载荷提供不同的刚度,保证了悬架的承载能力,提高了乘坐舒适性。(The invention discloses an integral bridge type suspension, wherein single sheet type steel plate springs are symmetrically arranged at two sides of an axle in the width direction; the two shock absorbers are respectively positioned at the front side and the rear side of the axle, and the two ends of the shock absorbers are respectively connected with the axle and the vehicle body; the elastic supporting unit is internally provided with an axial through hole, the outer wall surface of the elastic supporting unit is provided with an annular bulge, the elastic supporting unit is arranged corresponding to the middle area of the single-sheet type steel plate spring, one end surface of the axial direction of the elastic supporting unit is connected with the single-sheet type steel plate spring or the vehicle body, and the other end surface of the axial direction of the elastic supporting unit corresponds to the single-sheet type steel plate spring or the vehicle body. The design of this whole bridge type suspension that this disclosure provided through single leaf spring and elastic support unit has reduced suspension weight, has improved economic nature and manipulation performance. Moreover, the whole bridge type suspension can provide different rigidity according to different loads, the bearing capacity of the suspension is guaranteed, and the riding comfort is improved.)

1. An integral bridge type suspension is characterized by comprising an axle, a single-piece type steel plate spring, a shock absorber and an elastic supporting unit; wherein the content of the first and second substances,

the single sheet type steel plate springs are symmetrically arranged on two sides of the axle in the width direction;

the shock absorbers are arranged in pairs, the two shock absorbers are respectively positioned on the front side and the rear side of the axle, and two ends of each shock absorber are respectively connected with the axle and the vehicle body;

the automobile elastic support is characterized in that an axial through hole is formed in the elastic support unit, an annular bulge is arranged on the outer wall surface of the elastic support unit, the elastic support unit and the middle area of the single-piece type steel plate spring are correspondingly arranged, one end face of the axial direction of the elastic support unit is connected with the single-piece type steel plate spring or an automobile body, and the other end face of the axial direction of the elastic support unit corresponds to the single-piece type steel plate spring or the automobile body.

2. The integral bridge suspension of claim 1 wherein said one-piece leaf spring tapers in thickness from a middle region to both ends.

3. The integral bridge suspension of claim 1 wherein the angle between the axis of the shock absorber and the vertical is greater than or equal to 10 ° and less than or equal to 30 °.

4. The integral bridge suspension according to claim 1, wherein one end face in the axial direction of said elastic support unit is connected to a vehicle body, and the other end face in the axial direction of said elastic support unit corresponds to said one-piece leaf spring.

5. The integral bridge suspension according to claim 4, wherein said elastic support unit includes an elastic support unit body having a columnar structure and an extension disc on an end surface of said elastic support unit body opposite to the vehicle body.

6. The integral bridge suspension of claim 5, wherein said resilient support unit body is rubber or polyurethane and said extension disc is metal.

7. The integral bridge suspension of claim 5 wherein said extension plate is bolted to the vehicle body.

8. The integral bridge suspension of claim 1 wherein said axial through hole is a tapered hole.

9. The integral bridge suspension as claimed in claim 1, wherein a plurality of said annular protrusions are provided on an outer wall surface of said elastic support unit, and a distance between adjacent ones of said annular protrusions is gradually increased in a direction approaching said axle.

10. The integral bridge suspension according to any one of claims 1 to 9 wherein said resilient support unit further comprises a stop mounted within said axial through hole and located on a side of said axial through hole adjacent to the vehicle body.

Technical Field

The invention relates to the field of vehicle engineering, in particular to an integral bridge type suspension.

Background

The suspension is an important component of modern automobiles, and has the functions of elastically connecting a frame or an automobile body with an axle or wheels, transmitting force and moment between the automobile and the frame or the automobile body, relieving impact load transmitted to the frame or the automobile body from a road surface, damping vibration, isolating noise input from the ground and tires, controlling the motion law of the wheels and ensuring that the automobile has required riding comfort and operation stability.

As shown in fig. 1, the conventional integral bridge suspension uses a leaf spring 2' as an elastic element, and the leaf spring 2' is connected with an axle 1' through a saddle bolt 3', and the leaf spring 2' plays a role in bearing and guiding. The integral bridge suspension damps vibrations by means of a damper 4', a damping mass 5' being mounted on the inside of the leaf spring 2 '. When the suspension is deformed under the action of load, the buffer block 5 'is contacted with the axle 1', thereby playing a role in limiting and achieving the effect of preventing the suspension from deforming too much and crashing the frame or the vehicle body.

However, the existing integral bridge suspension has the following defects: (1) the steel plate spring 2' has large self weight and is not beneficial to the light weight design of the whole vehicle; (2) when the steel plate spring 2' moves, the sheets rub against each other to generate dynamic stiffness, and the smoothness is poor; (3) the unsprung mass of the suspension is high, which is detrimental to handling stability.

Therefore, how to provide a monolithic suspension that can overcome the defects in the prior art is a technical problem that needs to be solved in the art.

Disclosure of Invention

It is an object of the present invention to provide a new solution for an integral bridge suspension that overcomes the drawbacks of the prior art.

According to a first aspect of the present invention, a unitary bridge suspension is provided.

The integral bridge type suspension comprises an axle, a single-piece type steel plate spring, a shock absorber and an elastic supporting unit; wherein the content of the first and second substances,

the single sheet type steel plate springs are symmetrically arranged on two sides of the axle in the width direction;

the shock absorbers are arranged in pairs, the two shock absorbers are respectively positioned on the front side and the rear side of the axle, and two ends of each shock absorber are respectively connected with the axle and the vehicle body;

the automobile elastic support is characterized in that an axial through hole is formed in the elastic support unit, an annular bulge is arranged on the outer wall surface of the elastic support unit, the elastic support unit and the middle area of the single-piece type steel plate spring are correspondingly arranged, one end face of the axial direction of the elastic support unit is connected with the single-piece type steel plate spring or an automobile body, and the other end face of the axial direction of the elastic support unit corresponds to the single-piece type steel plate spring or the automobile body.

Optionally, the thickness of the single leaf spring decreases from the middle region to both ends.

Optionally, an included angle between the axis of the shock absorber and the vertical line is greater than or equal to 10 degrees and less than or equal to 30 degrees.

Optionally, one end surface of the elastic support unit in the axial direction is connected to the vehicle body, and the other end surface of the elastic support unit in the axial direction corresponds to the single leaf spring.

Optionally, the elastic support unit includes an elastic support unit body and an extension disc, the elastic support unit body has a columnar structure, and the extension disc is located on an end face of the elastic support unit body opposite to the vehicle body.

Optionally, the elastic supporting unit body is made of rubber or polyurethane, and the extension disc is made of metal.

Optionally, the extension disc is connected with the vehicle body through a bolt.

Optionally, the axial through hole is a reducing hole.

Optionally, a plurality of annular protrusions are arranged on the outer wall surface of the elastic support unit, and the distance between adjacent annular protrusions gradually increases along the direction close to the axle.

Optionally, the elastic support unit further includes a limiting member, the limiting member is installed in the axial through hole, and the limiting member is located on one side of the axial through hole, which is adjacent to the vehicle body.

The design of this whole bridge type suspension that this disclosure provided through single leaf spring and elastic support unit has reduced suspension weight, has improved economic nature and manipulation performance. Moreover, the whole bridge type suspension can provide different rigidity according to different loads, the bearing capacity of the suspension is guaranteed, and the riding comfort is improved.

Other features of the present invention and advantages thereof will become apparent from the following detailed description of exemplary embodiments thereof, which proceeds with reference to the accompanying drawings.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description, serve to explain the principles of the invention.

Fig. 1 is a schematic structural view of a conventional integral bridge suspension.

FIG. 2 is a schematic structural diagram of an embodiment of the integral bridge suspension of the present disclosure.

Fig. 3 is a schematic structural diagram of an embodiment of an elastic support unit of the integral bridge suspension according to the present disclosure.

Fig. 4 is a cross-sectional view of fig. 3.

FIG. 5 is a graph of stiffness change for an embodiment of the integral bridge suspension of the present disclosure.

The figures are labeled as follows:

the axle comprises an axle-1 ', a steel plate spring-2 ', a riding bolt-3 ', a shock absorber-4 ', a buffer block-5 ', the axle-1, a single-piece steel plate spring-2, a shock absorber-3, an elastic supporting unit-4, an elastic supporting unit body-41, an axial through hole-411, an annular bulge-412, an extending disc-42 and a limiting piece-43.

Detailed Description

Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that: the relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise.

The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.

Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate.

In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.

As shown in fig. 2 to 5, the integral bridge suspension of the present disclosure includes an axle 1, a one-piece leaf spring 2, a shock absorber 3, and an elastic support unit 4.

The single leaf springs 2 are symmetrically mounted on both sides of the axle 1 in the width direction. The two sides of the axle 1 in the width direction refer to the two sides of the whole vehicle in the width direction. The single leaf spring 2 avoids dynamic friction between the leaves and reduces the dynamic stiffness during operation, thereby improving riding comfort and reducing weight.

The shock absorbers 3 are provided in pairs, and the two shock absorbers 3 are located on the front side and the rear side of the axle 1, respectively. The two ends of the shock absorber 3 are respectively connected with the axle 1 and the vehicle body. The vehicle body in the present disclosure may be a frame or a vehicle body.

An axial through hole 411 is arranged in the elastic supporting unit 4, and an annular protrusion 412 is arranged on the outer wall surface of the elastic supporting unit 4. The elastic supporting unit 4 is arranged corresponding to the middle area of the single leaf spring 2, one end face of the elastic supporting unit 4 in the axial direction is connected with the single leaf spring 2 or the vehicle body, and the other end face of the elastic supporting unit 4 in the axial direction corresponds to the single leaf spring 2 or the vehicle body. The middle region of the one-piece leaf spring 2 refers to a region including the midpoint of the one-piece leaf spring 2, and the distances from the edges of both sides of the one-piece leaf spring 2 in the length direction to the center of the one-piece leaf spring 2 are equal.

In specific implementation, one end surface of the elastic supporting unit 4 in the axial direction is connected with the single leaf spring 2, and the other end surface of the elastic supporting unit 4 in the axial direction corresponds to the vehicle body; depending on the load of the vehicle, there is a gap between the elastic support unit 4 and the vehicle body, or the elastic support unit 4 may be in contact with the vehicle body. Or one end surface of the elastic supporting unit 4 in the axial direction is connected with the vehicle body, and the other end surface of the elastic supporting unit 4 in the axial direction corresponds to the single leaf spring 2; depending on the vehicle load, there is a gap between the elastic support unit 4 and the one-piece leaf spring 2, or the elastic support unit 4 may be in contact with the surface of the one-piece leaf spring 2.

To better illustrate the operation of the integral bridge suspension, the load of the vehicle and the stiffness variation of the suspension are described:

as shown in fig. 5, when the vehicle is unloaded (e.g., when only the driver is present), the load (G1) is borne by the single leaf spring 2, and the suspension stiffness is K1. As the load increases (e.g., increase of passengers or cargo), when the load reaches a normal operation condition or a design operation condition (e.g., passengers reach 3 or 4), that is, the load reaches G2, at which time the elastic support unit 4 starts to operate (e.g., the gap between the single leaf spring 2 is reduced to 0 and contacts the single leaf spring 2), the overall suspension stiffness increases, thereby ensuring the load-bearing capacity, at which time the suspension stiffness is K2. When the vehicle reaches the maximum design load G3, the elastic support unit 4 further participates in the work, and the suspension rigidity reaches K3. When the load is further increased by an impact or the like until reaching the load G4, the elastic support unit 4 further participates in the work until reaching the suspension rigidity K4.

During specific implementation, a stopper made of hard materials can be arranged in the elastic supporting unit 4, so that when the load reaches G4, the stopper in the elastic supporting unit 4 limits the deformation of the elastic supporting unit 4, the purpose of preventing the axle 1 from colliding with the vehicle body is achieved, and damage is avoided.

The design of this whole bridge type suspension that this disclosure provided through single leaf spring and elastic support unit 4 has reduced suspension weight, has improved economic nature and manipulation performance. Moreover, the whole bridge type suspension can provide different rigidity according to different loads, the bearing capacity of the suspension is guaranteed, and the riding comfort is improved.

In one embodiment of the present disclosure, the thickness of the single leaf spring 2 is gradually reduced from the middle region to both ends in order to achieve better weight reduction and vibration damping.

In one embodiment of the integral bridge suspension of the present disclosure, in order to achieve better damping effect, the included angle between the axis of the damper 3 and the vertical line is greater than or equal to 10 ° and less than or equal to 30 °.

In one embodiment of the integral bridge suspension of the present disclosure, in order to improve controllability, one end surface in the axial direction of the elastic support unit 4 is connected to the vehicle body, and the other end surface in the axial direction of the elastic support unit 4 corresponds to the one-piece leaf spring 2.

Further, the elastic supporting unit 4 includes an elastic supporting unit body 41 and an extension tray 42. The elastic support unit body 41 has a columnar structure. The extension tray 42 is located on an end surface of the elastic support unit body 41 opposite to the vehicle body. The elastic support unit 4 of such a structure is advantageous in improving the smoothness of the change in the suspension rigidity.

Furthermore, the elastic supporting unit body 41 is made of rubber or polyurethane, and the extension plate 42 is made of metal.

Further, the extension plate 42 is connected to the vehicle body by bolts.

In one embodiment of the integral bridge suspension of the present disclosure, the axial through hole 411 is a tapered hole in order to improve the smoothness of the change in the stiffness of the suspension.

In one embodiment of the integral bridge suspension of the present disclosure, a plurality of annular protrusions 412 are provided on the outer wall surface of the elastic support unit 4, and the spacing between adjacent annular protrusions 412 gradually increases in the direction approaching the vehicle axle 1. The elastic supporting unit 4 with such a structure is beneficial to improving the bearing capacity, and improving the riding comfort and the operation stability.

In one embodiment of the integral bridge suspension of the present disclosure, the elastic support unit 4 further includes a stopper 43. The limiting member 43 is installed in the axial through hole 411, and the limiting member 43 is located on one side of the axial through hole 411 adjacent to the vehicle body. The position-limiting member 43 may be made of metal. The limiting member 43 can improve the pressure resistance of the elastic supporting unit 4.

Although some specific embodiments of the present invention have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustrative purposes only and are not intended to limit the scope of the present invention. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the invention. The scope of the invention is defined by the appended claims.