CN115076278A

CN115076278A - Torsion rigidity controllable elastic-reducing integrated air spring assembly

Info

Publication number: CN115076278A
Application number: CN202210533929.5A
Authority: CN
Inventors: 李耀超; 李俊伟; 郑文博; 禹真
Original assignee: FAW Group Corp
Current assignee: FAW Group Corp
Priority date: 2022-05-17
Filing date: 2022-05-17
Publication date: 2022-09-20

Abstract

The invention belongs to the technical field of air springs, and particularly relates to an integral type spring-reducing air spring assembly with controllable torsional rigidity; the shock absorber body extends into the hollow spring from bottom to top, so that a shock absorber piston rod of the shock absorber body is fastened at the top of the hollow spring; a shock absorber tray is sleeved and fixed on the outer ring below the shock absorber body, a nylon ring is sleeved on the outer ring of the shock absorber tray, and the inner side wall of the bottom of the hollow spring piston of the hollow spring is in contact with the nylon ring; the torsion gasket is sleeved outside the nylon ring and positioned between the bottom of the hollow spring piston and the shock absorber tray, the top of the torsion gasket is contacted with the bottom of the hollow spring piston, and the bottom of the torsion gasket is contacted with the shock absorber tray; the invention solves the problem of small-angle (within +/-10 degrees) rotation of the integral spring-damper air spring caused by the movement of a rod system in a double-wishbone suspension scheme, and improves the durability of the air spring and a bushing at the lower point of a sliding column on the premise of ensuring simple structure and small occupied volume.

Description

Torsion rigidity controllable elastic-reducing integrated air spring assembly

Technical Field

The invention belongs to the technical field of air springs, and particularly relates to an integral type spring reducing air spring assembly with controllable torsional rigidity.

Background

In the double-wishbone suspension scheme, although the sprung-damped integrated strut system does not work like split steering in a McPherson suspension, torsional moment is generated in the strut system due to the action of the suspension rod system during suspension motions such as wheel yaw, reverse wheel slip and lateral force applied to the wheels. For the air spring, if the torsional rigidity of the spring is too high, the air spring is not twisted under the action of torsional moment, so that the acting force is directly transmitted to the spring capsule skin and the suspension rubber bushing, the load of the air spring is increased under the working condition, and the durability of the air spring and the suspension rubber bushing is seriously influenced. For the air spring without a special torsion structure, the torsion rigidity of the air spring is mainly determined by a capsule skin, and a larger torsion rigidity is inevitably generated no matter the air spring is a single-layer cord capsule skin or a multi-layer cord capsule skin, if the negative influence caused by the overlarge torsion rigidity of the air spring is to be solved, or special requirements are put on the arrangement of a suspension system, for example, a stabilizer bar connecting rod is arranged on a control arm, or a hard point of the stabilizer bar connecting rod is required to be on the axis of a sliding column, so that the torsion moment is avoided; furthermore, a solution is found from the structure of the air spring, and a special structure is needed to reduce the torsional rigidity of the air spring. The common scheme for adding the bearing has extremely low torsional rigidity of the air spring, so that the scheme has little influence on the scheme that the lower connecting point of the sliding column is a spherical pin, but the scheme that the lower connecting point of the sliding column is a bushing scheme, because the torsional rigidity of the air spring is low, the torsional angle of the sliding column is increased, and the durability of the bushing is greatly influenced.

For example, in the prior art, the problem of relative rotation of the shock absorber relative to an external support of the shock absorber is solved by two plane bearings and a plurality of sealing structures which are arranged on the upper portion and the lower portion of the shock absorber, the shock absorber body and a hollow spring are ensured to be integrated, a sliding column system can rotate around the fixed portion, the shock absorber is applied to a Macpherson suspension system, on one hand, a double-bearing sealing structure is used for solving the problem that the shock absorber slides relative to a connecting support of the shock absorber, on the other hand, the detailed scheme of the bearing is not described and protected, but only the bearing is described as a plane bearing, a ball bearing or a self-aligning roller bearing.

For example, in the prior art, the outer assembly and the inner assembly are connected together by using the bearing, so that the structure is complex, the occupied space is large, the bearing is limited (no matter tensile load or compressive load is received, force needs to be transmitted along the axial direction through the bearing, and the axial force transmission capability of the deep groove ball bearing is limited), and the deep groove ball bearing is suitable for use working conditions with high requirements on torsion angle and light bearing.

In summary, for the suspension solution in which the lower point of the strut is the bushing, a solution is urgently needed from the design requirement, which is to provide the torsion angle space (± 10 °) of the strut and control the torsion angle within a reasonable range so as to ensure the durability of the lower point bushing.

Disclosure of Invention

In order to overcome the problems, the invention provides an integral damper air spring assembly with controllable torsional rigidity, which solves the problem of small-angle (within +/-10 degrees) rotation of an integral damper air spring caused by rod system motion in a double-wishbone suspension scheme, and improves the durability of the air spring and a bushing at the lower point of a sliding column on the premise of ensuring simple structure and small occupied volume.

An elastic-reducing integrated air spring assembly with controllable torsional rigidity comprises an air spring 1, a torsional gasket 3, a shock absorber body 4 and a shock absorber tray 5, wherein the shock absorber body 4 extends into the air spring 1 from bottom to top, so that a shock absorber piston rod of the shock absorber body 4 penetrates through an upper suspension inner hole in the top of the air spring 1 and is fastened to the top of the air spring 1;

a shock absorber tray 5 is sleeved and fixed on the outer ring below the shock absorber body 4, a nylon ring 2 is sleeved on the outer ring of the shock absorber tray 5, and the inner side wall of the bottom of a hollow spring piston 11 of a hollow spring 1 is in contact with the nylon ring 2; the torsion gasket 3 is sleeved outside the nylon ring 2 and is positioned between the bottom of the hollow spring piston 11 and the shock absorber tray 5, the top of the torsion gasket 3 is contacted with the bottom of the hollow spring piston 11, and the bottom of the torsion gasket 3 is contacted with the shock absorber tray 5.

The torsion gasket 3 comprises a metal framework 31 and a rubber layer 32, wherein the rubber layer 32 is arranged at the bottom of the metal framework 31, the top of the metal framework 31 is in contact with the bottom of the hollow spring piston 11, and the bottom of the rubber layer 32 is in contact with the shock absorber tray 5.

The upper surface of the metal framework 31 is provided with knurls or sharp teeth.

The metal framework 31 and the rubber layer 32 are bonded into a whole through vulcanization.

The outer race of the rubber layer 32 is gradually recessed inwardly.

A plurality of slots 321 are uniformly formed in the rubber layer 32 along the circumferential direction thereof.

The rubber layer 32 comprises three layers which are sequentially fixed together from top to bottom, the upper layer is a rubber top layer 322, the middle layer is a metal insert 323, and the bottom layer is a rubber bottom layer 324.

The shock absorber tray 5 comprises a tray ring 51 and a tray flange 52, wherein the bottom of the tray ring 51 extends outwards to form the tray flange 52, the tray ring 51 is sleeved outside the shock absorber body 4, the nylon ring 2 is sleeved on the outer ring of the tray ring 51, and meanwhile the bottom of the nylon ring 2 is in contact with the tray flange 52.

And the sealing ring 6 is further included, wherein the sealing ring 6 is sleeved outside the tray ring 51 between the tray ring 51 and the hollow spring piston 11 and is positioned above the nylon ring 2.

The invention has the beneficial effects that:

the invention solves the problem of small-angle (within +/-10 degrees) rotation of the integral spring-damper air spring caused by the movement of a rod system in a double-wishbone suspension scheme, and improves the durability of the air spring and a bushing at the lower point of a sliding column on the premise of ensuring simple structure and small occupied volume.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments of the present invention will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the contents of the embodiments of the present invention and the drawings without creative efforts.

FIG. 1 is a schematic structural diagram of the present invention.

Fig. 2 is an enlarged view of a part of the structure of the present invention.

Fig. 3 is a schematic view of the metal framework structure of the present invention.

FIG. 4 is a detailed view of the twist pad of the present invention.

FIG. 5 is a schematic view of the rubber layer structure in example 1 of the present invention.

FIG. 6 is a schematic view of the rubber layer structure in example 2 of the present invention.

Wherein: the damper comprises an air spring 1, an air spring piston 11, a nylon ring 2, a torsion gasket 3, a metal framework 31, a rubber layer 32, a groove 321, a rubber top layer 322, a metal insert 323, a rubber bottom layer 324, a damper body 4, a damper tray 5, a tray ring 51, a tray flanging 52 and a sealing ring 6.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.

In the description of the present invention, unless otherwise explicitly specified or limited, the terms "connected," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature "on," "above" and "over" the second feature may include the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "left", "right", and the like are used based on the orientations and positional relationships shown in the drawings only for convenience of description and simplification of operation, and do not indicate or imply that the referred device or element must have a specific orientation, be configured and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to be limiting.

Example 1

As shown in fig. 1 and 2, an elastic-damping integrated air spring assembly with controllable torsional stiffness comprises an air spring 1, a torsional gasket 3, a shock absorber body 4 and a shock absorber tray 5, wherein the shock absorber body 4 extends into the air spring 1 from bottom to top, so that a shock absorber piston rod of the shock absorber body 4 penetrates through an upper suspension inner hole at the top of the air spring 1 and is fastened at the top of the air spring 1 (the end part of the shock absorber piston rod penetrates through the upper suspension inner hole at the top of the air spring 1 and is connected with the top of the shock absorber body 4 through a nut and a thread at the end part of the shock absorber piston rod);

a shock absorber tray 5 is sleeved and fixed on the outer ring below the shock absorber body 4, a nylon ring 2 is sleeved on the outer ring of the shock absorber tray 5, and the inner side wall of the bottom of a hollow spring piston 11 of a hollow spring 1 is in contact with the nylon ring 2; the torsion gasket 3 is sleeved outside the nylon ring 2 and is positioned between the bottom of the hollow spring piston 11 and the shock absorber tray 5, the top of the torsion gasket 3 is contacted with the bottom of the hollow spring piston 11, and the bottom of the torsion gasket 3 is contacted with the shock absorber tray 5. After the air spring 1 is inflated, pressure is generated in the sealed space, and the bottom cannot be separated from the shock absorber. The air spring piston 11 is in sealing relationship with the damper side wall and the tray through the nylon ring 2 and the torsional shim 3.

As shown in fig. 3-5, the torsion washer 3 includes a metal frame 31 and a rubber layer 32, wherein the rubber layer 32 is disposed at the bottom of the metal frame 31, the top of the metal frame 31 contacts with the bottom of the hollow spring piston 11, and the bottom of the rubber layer 32 contacts with the damper tray 5.

The outer ring of the rubber layer 32 is recessed inward gradually, and a plurality of slots 321 are uniformly arranged in the circumferential direction of the rubber layer 32.

The torsional rigidity of the torsional gasket 3 is adjusted through the thickness of the rubber layer 32, the hardness of the selected rubber material and the structure of the rubber layer 32, and further the torsional rigidity of the sliding column assembly is adjusted.

And the sealing ring 6 is further included, wherein the sealing ring 6 is sleeved outside the tray ring 51 between the tray ring 51 and the hollow spring piston 11 and is positioned above the nylon ring 2. Sealing between the damper pallet 5, the air spring piston 11 and the nylon ring 2 is achieved.

Example 2

As shown in fig. 6, the same as the embodiment is different in that the rubber layer 32 includes three layers fixed together from top to bottom, the upper layer is a rubber top layer 322, the middle layer is a metal insert 323, and the bottom layer is a rubber bottom layer 324.

Example 3

The structure consists of 3 parts including a hollow spring 1, a damper body 4 and a torsion gasket 3

The torsional washer 3 is composed of a rubber layer 32 and a metal skeleton 31. The metal framework 31 is in contact with the lower end face of the air spring piston 11, and aims to disperse the vertical acting force of the end face of the air spring piston 11 and uniformly disperse the acting force on the rubber layer 32. The rubber layer 32 is in direct contact with the damper pallet 5.

The upper surface of the metal framework 31 is provided with a knurl or sharp tooth structure to increase the friction force between the torsion pad 3 and the bottom end of the air spring piston 11 and prevent the air spring piston 11 and the torsion pad 3 from sliding relatively due to the excessively small friction force.

The metal skeleton 31 and the rubber layer 32 are bonded into a whole through vulcanization.

The rubber layer 32 serves to provide torsional rigidity to the spool and ensures that the spool can twist through a range of angles when subjected to an applied force.

The rubber layer 32 structure is an arc structure with two sides sunken inwards in a cross section view, and the inwards sunken arc structure can reduce the outward expansion of rubber when the rubber layer 32 is subjected to vertical pressure from the air spring piston 11 as much as possible, so that the rubber is prevented from being cut by the edge of the metal framework 31, and the rubber is prevented from interfering with other peripheral parts.

For the rubber layer 32, the torsional rigidity of the torsional gasket 3 and further the torsional rigidity of the sliding column assembly can be adjusted by adjusting the thickness of the rubber gasket, the hardness of the rubber material and the rubber structure.

For example, the rubber layer 32 is subjected to a local grooving process, and the torsional rigidity of the torsional gasket 3 is reduced by reducing the filling amount of the rubber, as shown in fig. 5, the size and the number of the grooves in the drawing are not limited to the schematic diagram, and the size and the number of the grooves can be defined according to the actual comprehensive consideration of the requirements of durability and torsional rigidity; such as by adding metal inserts 323 in the middle of the rubber layer 32 to adjust the torsional stiffness of the torsional shim 3.

Although the preferred embodiments of the present invention have been described in detail with reference to the accompanying drawings, the scope of the present invention is not limited to the specific details of the above embodiments, and any person skilled in the art can substitute or change the technical solution of the present invention and its inventive concept within the technical scope of the present invention, and these simple modifications belong to the scope of the present invention.

It should be noted that the various technical features described in the above embodiments can be combined in any suitable manner without contradiction, and the invention is not described in any way for the possible combinations in order to avoid unnecessary repetition.

In addition, any combination of the various embodiments of the present invention is also possible, and the same should be considered as the disclosure of the present invention as long as it does not depart from the spirit of the present invention.

Claims

1. An elastic-reducing integrated air spring assembly with controllable torsional rigidity comprises an air spring (1), a shock absorber body (4), a shock absorber tray (5) and is characterized by further comprising a torsional gasket (3), wherein the shock absorber body (4) extends into the air spring (1) from bottom to top, so that a shock absorber piston rod of the shock absorber body (4) penetrates through an upper suspension inner hole in the top of the air spring (1) and is fastened to the top of the air spring (1); a shock absorber tray (5) is sleeved and fixed on the outer ring below the shock absorber body (4), a nylon ring (2) is sleeved on the outer ring of the shock absorber tray (5), and the inner side wall of the bottom of a hollow spring piston (11) of a hollow spring (1) is in contact with the nylon ring (2); the torsion gasket (3) is sleeved outside the nylon ring (2) and is positioned between the bottom of the hollow spring piston (11) and the shock absorber tray (5), the top of the torsion gasket (3) is contacted with the bottom of the hollow spring piston (11), and the bottom of the torsion gasket (3) is contacted with the shock absorber tray (5).

2. A torsion stiffness controlled integral type air spring assembly according to claim 1, wherein the torsion washer (3) comprises a metal frame (31) and a rubber layer (32), wherein the rubber layer (32) is provided on the bottom of the metal frame (31), the top of the metal frame (31) is in contact with the bottom of the air spring piston (11), and the bottom of the rubber layer (32) is in contact with the damper pallet (5).

3. An integrated torsion stiffness controlled spring and damper air spring assembly according to claim 2, wherein the metal skeleton (31) is provided with knurls or sharp teeth on the upper surface.

4. A torsion stiffness controlled, integral air spring assembly according to claim 3, wherein said metal skeleton (31) and rubber layer (32) are bonded together by vulcanization.

5. A torsion stiffness controlled, integral air spring assembly according to claim 2 wherein said outer race of said rubber layer (32) is inwardly tapered.

6. An integral torsion stiffness controlled damping air spring assembly according to claim 5 wherein said rubber layer (32) has a plurality of slots (321) uniformly formed along its circumference.

7. An integrated torsion stiffness controlled air spring assembly according to claim 2, wherein the rubber layer (32) comprises three layers secured together from top to bottom, the upper layer being a top rubber layer (322), the middle layer being a metal insert (323), and the bottom layer being a bottom rubber layer (324).

8. An elastic-reducing integrated air spring assembly with controllable torsional rigidity according to claim 1, wherein the shock absorber tray (5) comprises a tray ring (51) and a tray flange (52), wherein the bottom of the tray ring (51) extends outwards to form the tray flange (52), the tray ring (51) is sleeved outside the shock absorber body (4), the nylon ring (2) is sleeved outside the tray ring (51), and the bottom of the nylon ring (2) is in contact with the tray flange (52).

9. A torsion stiffness controlled integral spring and damper air spring assembly according to claim 8 further comprising a seal ring (6), wherein the seal ring (6) is disposed around the outer surface of the carrier ring (51) between the carrier ring (51) and the air spring piston (11) and above the nylon ring (2).