CN115076277A

CN115076277A - Low torsional rigidity's elasticity subtracts integral type air spring assembly

Info

Publication number: CN115076277A
Application number: CN202210533925.7A
Authority: CN
Inventors: 李耀超; 单帅; 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 elastic-reducing integrated air spring assembly with low torsional rigidity; the outer wall of the end cover of the shock absorber is provided with a convex point, the inner side of the hollow spring piston is provided with an annular boss, and the shock absorber body extends into the hollow spring from bottom to top, so that the piston rod of the shock absorber is fastened at the top of the hollow spring, and the convex point is in contact with the annular boss; 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 is in contact with the nylon ring; the plane sliding bearing is sleeved outside the nylon ring, the top of the plane sliding bearing is contacted with the bottom of the air spring piston, and the bottom of the plane sliding bearing 3 is contacted with the shock absorber tray; the invention has the advantages of exquisite structure, small occupied volume and space and high bearing capacity, and can meet the use requirement of a small rotation angle (+/-10 degrees) generated by a sliding column system in the motion of the double-fork arm suspension in a targeted manner.

Description

Low torsional rigidity's elasticity subtracts integral type air spring assembly

Technical Field

The invention belongs to the technical field of air springs, and particularly relates to an elastic-reducing integrated air spring assembly with low 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 when being subjected to 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 in 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 conventional macpherson air spring has a ball bearing scheme at the upper tank, and the scheme has a plurality of disadvantages including complex structure, large occupied volume and limited bearing.

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.

In addition, in the prior art, the external assembly and the internal assembly are connected together by using the bearing, the solution is complex in structure, large in occupied space and limited in bearing (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 capacity 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 angles and light bearing.

Disclosure of Invention

In order to overcome the problems, the invention provides the elastic-reducing integrated air spring assembly with low torsional rigidity, which has the advantages of exquisite structure, small occupied volume and space and high bearing capacity, and the use requirement of a small rotation angle (+/-10 degrees) generated by a sliding column system in the motion of a double-fork arm suspension is met in a targeted manner.

An integrated air spring assembly with low torsional rigidity and elasticity reduction comprises an air spring 1, a nylon ring 2, a plane sliding and rotating bearing 3, a shock absorber body 4, a shock absorber tray 5 and a sealing ring 6, wherein a plurality of salient points 42 are arranged on the outer wall of a shock absorber end cover 41 of the shock absorber body 4, an annular boss 12 arranged along the circumferential direction of the air spring piston 11 is arranged on the inner side of the top of an air spring piston 11 of the air spring 1, 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, and meanwhile, the salient points 42 are in contact with the annular boss 12;

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 plane sliding-rotating bearing 3 is sleeved outside the nylon ring 2 and is positioned between the bottom of the air spring piston 11 and the shock absorber tray 5, the top of the plane sliding-rotating bearing 3 is contacted with the bottom of the air spring piston 11, and the bottom of the plane sliding-rotating bearing 3 is contacted with the shock absorber tray 5.

The plane sliding bearing 3 comprises a metal gasket 31 and an anti-abrasion gasket 32, wherein a flanging 311 is arranged at the bottom of an outer ring of the metal gasket 31, the cross section of the flanging 311 is trapezoidal, a trapezoidal groove 321 is arranged above an outer ring of the anti-abrasion gasket 32, the metal gasket 31 is connected in the trapezoidal groove 321 of the anti-abrasion gasket 32 in a matching mode through the flanging 311 on the metal gasket, the top of the metal gasket 31 is in contact with the bottom of the air spring piston 11, and the bottom of the anti-abrasion gasket 32 is in contact with the shock absorber tray 5.

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

The side wall of the trapezoidal groove 321 is provided with a sealing tooth 322 and a first grease groove 323, the flanging 311 of the metal gasket 31 is in contact with the sealing tooth 322 in the trapezoidal groove 321 to form sealing, and grease is stored in the first grease groove 323.

And a second grease groove 324 for storing grease is formed in one side of the anti-wear gasket 32, which is in contact with the metal gasket 31.

The second grease groove 324 is an annular groove circumferentially arranged along the wear pad 32.

The second grease groove 324 is a plurality of hole grooves formed along the circumference of the wear-resistant gasket 32 at the top of the wear-resistant gasket 32.

The bottom of the wear-resistant gasket 32 is provided with an anti-slip rib 324 and a sealing rib 325.

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:

aiming at the problem of small-angle (within +/-10 degrees) rotation of the integral air spring for springing and reducing caused by the movement of a rod system in a double-wishbone suspension scheme, the invention improves the durability of the air spring and a rubber bushing of a suspension system on the premise of ensuring simple structure, small occupied volume and high bearing capacity.

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 a partial structural schematic diagram of the present invention.

Fig. 3 is a schematic structural view of a plane sliding-rotating bearing according to the present invention.

Fig. 4 is a schematic cross-sectional view of the wear-resistant pad of the present invention.

Fig. 5 is a schematic view of the bottom structure of the wear-resistant pad of the present invention.

Fig. 6 is a schematic structural view of an anti-wear pad according to embodiment 1 of the present invention.

Fig. 7 is a schematic structural view of an abrasion-proof pad in embodiment 2 of the present invention.

FIG. 8 is a schematic view of the connection of the air spring piston to the end cap of the shock absorber according to the present invention.

Wherein: the damper comprises a hollow spring 1, a hollow spring piston 11, an annular boss 12, a nylon ring 2, a plane sliding bearing 3, a metal gasket 31, a flanging 311, an anti-abrasion gasket 32, a trapezoidal groove 321, a sealing tooth 322, a first grease groove 323, a second grease groove 324, an anti-abrasion rib 324, a sealing rib 325, a damper body 4, a damper end cover 41, a salient point 42, 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 expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, removably connected, or integral to one another; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or may be connected through the use of two elements or the interaction of 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.

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 being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely 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 have a special meaning.

Example 1

As shown in fig. 1, 2 and 8, a low torsional rigidity, anti-bounce integrated air spring assembly comprises an air spring 1, a nylon ring 2, a plane sliding bearing 3, a shock absorber body 4, a shock absorber tray 5 and a sealing ring 6, wherein a plurality of salient points 42 are arranged on the outer wall of a shock absorber end cover 41 of the shock absorber body 4, an annular boss 12 arranged along the circumferential direction of the air spring piston 11 is arranged on the inner side of the top of the air spring piston 11 of the air spring 1, and 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 on the top of the air spring 1 and is fastened on the top of the air spring 1, and the salient points 42 are in contact with the annular boss 12;

(the end part of the piston rod of the shock absorber passes through the upper suspension inner hole at the top of the hollow spring 1, and then the hollow body 1 is connected with the top of the shock absorber body 4 through the threaded connection of the nut and the end part of the piston rod of the shock absorber);

As shown in fig. 3-6, the planar sliding bearing 3 includes a metal gasket 31 and an anti-wear gasket 32, wherein a flange 311 is disposed at the bottom of the outer ring of the metal gasket 31, the cross section of the flange 311 is trapezoidal, a trapezoidal groove 321 is disposed above the outer ring of the anti-wear gasket 32, the metal gasket 31 is connected in the trapezoidal groove 321 of the anti-wear gasket 32 through the flange 311 thereon, the top of the metal gasket 31 contacts with the bottom of the air spring piston 11, and the bottom of the anti-wear gasket 32 contacts with the shock absorber tray 5.

The number of the sealing teeth 322 is two, and the number of the first grease groove 323 is three.

A second grease groove 324 for storing grease is formed in one side, namely the top, of the anti-wear gasket 32, which is in contact with the metal gasket 31.

The second grease groove 324 is a blind groove.

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. 7, the same as embodiment 1, except that the second grease groove 324 is a plurality of hole grooves formed along the circumference of the wear pad 32 at the top of the wear pad 32.

Example 3

The structure comprises an air spring 1, a damper body 4 and a plane smooth rotation bearing 3.

The plane sliding bearing 3 is composed of a metal gasket 31 and an abrasion-proof gasket 32. The purpose of the metal shim 31 is to disperse the force applied to the end face of the air spring piston 11 of the air spring 1 and to uniformly disperse the force to the wear-resistant shim 32.

The outer side of the metal gasket 31 is provided with a flanging 311, the section of the flanging 311 is of a trapezoidal structure, and the flanging 311 has the functions of improving the structural strength and avoiding warping when the air spring piston 11 is pressed; on one hand, the design of the flanging 311 and the anti-wear gasket 32 are matched together, so that a sealing effect can be achieved, and water and dust are prevented from entering a friction surface between the metal gasket 31 and the anti-wear gasket 32; furthermore, due to the design of the structure of the turned-over edge 311, the metal gasket 31 and the anti-wear gasket 32 can be restricted from twisting along the radial direction by matching with the trapezoidal groove 321 on the anti-wear gasket 32, and the lateral force can be resisted greatly.

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

The wear pad 32 is made of plastic and may be made of teflon, nylon 66 or other wear resistant materials.

The outer edge of the wear-resistant gasket 32 is provided with a trapezoidal groove 321 for matching with the metal gasket 31. The side wall of the trapezoid groove 321 is designed with a sealing tooth 322 and a grease groove I323 structure, after the anti-wear gasket 32 and the metal gasket 31 are assembled, the two side surfaces of the trapezoid groove 321 are contacted through the sealing tooth 322 to form sealing, and the rest part on the trapezoid groove 321 keeps a gap. The grease filled in the first grease groove 323 can increase the lubricating effect, reduce the resistance of the metal gasket 31 and the anti-abrasion gasket 32 during relative rotation, and play a role in auxiliary sealing.

There are two, but not limited to two, seal teeth 322 on the side walls of the trapezoidal groove 321 of the wear pad 32. There are 3, but not limited to 3 grease grooves one 323.

The top surface side of the anti-wear gasket 32, which is in contact with the metal gasket 31, is provided with a second grease groove 324 for storing grease. The second grease groove 324 can be a groove type or a hole type, different shapes and numbers can influence the starting moment and the rotating moment of the plane sliding and rotating bearing 3, and the second grease groove 324 can also be an annular groove.

The second grease groove 324 is a blind groove instead of a through groove, so that grease is only present on the contact surface of the metal gasket 31 and the anti-wear gasket 32.

The bottom of the anti-wear gasket 32 is designed with anti-slip ribs and sealing ribs, the anti-slip resistance between the anti-wear gasket 32 and the shock absorber tray 5 is increased through an anti-slip rib structure, and the sealing relation between the contact surface of the anti-wear gasket 32 and the shock absorber tray 5 is ensured through a sealing rib structure. The quantity of the anti-skid ribs and the quantity of the sealing ribs are not limited so as to achieve the actual anti-skid effect and the sealing effect. When the slip resistance is not enough, the number of the anti-slip ribs can be increased, and when the sealing effect is poor, the number of the sealing ribs can be increased.

The side wall of the bottom end of the air spring piston 11 is in contact with the nylon ring 2 above the shock absorber tray 5, meanwhile, an inner side boss structure is designed at the upper end of the air spring piston 11 to be in contact with a salient point on a shock absorber end cover, the buckling of the air spring piston 11 relative to the shock absorber body 4 is limited by the fixing mode of limiting the two ends, and the good stress of the plane sliding rotating bearing 3 is ensured.

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 integrated air spring assembly with low torsional rigidity and elasticity reduction comprises an air spring (1), a shock absorber body (4), a shock absorber tray (5) and is characterized by further comprising a nylon ring (2), a plane sliding and rotating bearing (3) and a sealing ring (6), wherein a plurality of salient points (42) are arranged on the outer wall of a shock absorber end cover (41) of the shock absorber body (4), an annular boss (12) arranged along the circumferential direction of the air spring piston (11) is arranged on the inner side of the top of the air spring piston (11) of the air spring (1), the shock absorber body (4) extends into the air spring (1) from bottom to top, a shock absorber piston rod of the shock absorber body (4) penetrates out of an upper suspension inner hole in the top of the air spring (1) and is fastened to the top of the air spring (1), and meanwhile the salient points (42) are in contact with the annular boss (12);

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 plane sliding and rotating bearing (3) is sleeved outside the nylon ring (2) and is positioned between the bottom of the air spring piston (11) and the shock absorber tray (5), the top of the plane sliding and rotating bearing (3) is contacted with the bottom of the air spring piston (11), and the bottom of the plane sliding and rotating bearing (3) is contacted with the shock absorber tray (5).

2. The air spring assembly with low torsional rigidity and one-piece damping structure as claimed in claim 1, wherein the plane sliding bearing (3) comprises a metal gasket (31) and an anti-wear gasket (32), wherein a flange (311) is arranged at the bottom of the outer ring of the metal gasket (31), the cross section of the flange (311) is trapezoidal, a trapezoidal groove (321) is arranged above the outer ring of the anti-wear gasket (32), the metal gasket (31) is connected in the trapezoidal groove (321) of the anti-wear gasket (32) in a matching manner through the flange (311) on the metal gasket (31), the top of the metal gasket (31) is in contact with the bottom of the air spring piston (11), and the bottom of the anti-wear gasket (32) is in contact with the damper tray (5).

3. A low torsional stiffness, integral spring and damper air spring assembly as claimed in claim 2 wherein said metal spacer (31) is knurled or pointed on its upper surface.

4. The air spring assembly with low torsional rigidity and one-piece damping structure as claimed in claim 3, wherein the side wall of the trapezoidal groove (321) is provided with a sealing tooth (322) and a first grease groove (323), and the flange (311) of the metal gasket (31) is in contact with the sealing tooth (322) in the trapezoidal groove (321) to form a seal, and the first grease groove (323) stores grease.

5. The air spring assembly with low torsional rigidity and one-piece damping structure as claimed in claim 4, wherein the side of the wear-resistant pad (32) contacting the metal pad (31) is provided with a second grease groove (324) for storing grease.

6. A low torsional stiffness elastomeric relief integrated air spring assembly as set forth in claim 5 wherein said second grease groove (324) is an annular groove disposed circumferentially along said wear pad (32).

7. A low torsional stiffness, integral air spring assembly of claim 5 wherein said second grease groove (324) is a plurality of circumferential grooves in the top of said wear pad (32) along the periphery of said wear pad (32).

8. A low torsional stiffness, integral air spring assembly as claimed in claim 6 or claim 7 wherein said wear pad (32) is provided with anti-slip ribs (324) and sealing ribs (325) at its bottom.

9. The air spring assembly with low torsional rigidity and one-piece damping body is characterized in that the damper 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 damper 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).

10. A low torsional stiffness, integral air spring assembly according to claim 9 further comprising a seal ring (6), wherein the seal ring (6) is disposed about the puck ring (51) between the puck ring (51) and the lost motion piston (11) and above the nylon ring (2).