Air suspension strut having an elastic damper bearing fastening

Patent metadata

Field	Value
Publication number	US-2021283967-A1
Application number	US-202117197884-A
Country	US
Kind code	A1
Filing date	Mar 10, 2021
Priority date	Mar 10, 2020
Publication date	Sep 16, 2021
Grant date	—

Abstract

An air suspension strut for a motor vehicle comprises an air spring having an air spring cover and a rolling piston. A shock damper is integrated with the air spring and has a damper tube and a piston rod receivable within the damper tube. A rolling bellows is secured between the spring cover and the rolling piston thereby delimiting a variable volume pressure chamber filled with compressed air. The rolling bellows rolls on the rolling piston with a rolling fold being formed. A damper bearing is accommodated in a bearing socket of the air spring cover and connected to the piston rod. The damper bearing comprises a supporting piece, an elastomer body, and a sleeve. A closure element inserted in the bearing socket above the damper bearing. An elastic element arranged between the sleeve and the closure element.

First claim

What is claimed is:

1 . An air suspension strut for a motor vehicle comprising:
an air spring having an air spring cover and a rolling piston; a shock damper integrated with the air spring and having a damper tube, and a piston rod receivable within the damper tube; a rolling bellows, composed of an elastomer material, secured pressure-tightly between the air spring cover and the rolling piston thereby delimiting a variable volume pressure chamber filled with compressed air, and wherein the rolling bellows rolls on the rolling piston with a rolling fold being formed; a damper bearing accommodated in a bearing socket of the air spring cover and connected to the piston rod, wherein the damper bearing comprises a supporting piece, an elastomer body, and a sleeve; a closure element inserted in the bearing socket above the damper bearing; and an elastic element arranged between the sleeve and the closure element.

2 . The air suspension strut as claimed in claim 1 , wherein the elastic element is configured, in operative connection with the closure element, to exert a force on the sleeve.

3 . The air suspension strut as claimed in claim 1 , wherein the sleeve comprises a flange, between which the elastic element and the closure element are arranged.

4 . The air suspension strut as claimed in claim 3 , wherein the flange projects radially outward.

5 . The air suspension strut as claimed in claim 3 , wherein a lower side of the flange rests against a first annular stop of the bearing socket.

6 . The air suspension strut as claimed in claim 3 , wherein the bearing socket further comprises a base, wherein the sleeve further comprises a rim situated opposite the flange, and wherein the rim of the sleeve is spaced apart from the base of the bearing socket.

7 . The air suspension strut as claimed in claim 1 , wherein the elastic element is a collar formed by the elastomer body.

8 . The air suspension strut as claimed in claim 7 , wherein the collar has an upper side with an undulating or crown-shaped structure.

9 . The air suspension strut as claimed in claim 1 , wherein the elastic element is a rubber ring.

10 . The air suspension strut as claimed in claim 9 , wherein the rubber ring is vulcanized or adhesively bonded to one of a lower side of the closure element and the sleeve.

11 . The air suspension strut as claimed in claim 1 , wherein the elastic element is a Belleville spring.

12 . The air suspension strut as claimed in claim 11 , wherein the Belleville spring comprises an outer rim which rests against the sleeve and an inner rim which rests against the closure element.

13 . The air suspension strut as claimed in claim 1 , wherein the elastic element is annular.

14 . The air suspension strut as claimed in claim 1 , wherein a sealing element is arranged between the sleeve and the bearing socket.

15 . The air suspension strut as claimed in claim 14 , wherein the sealing element is vulcanized or adhesively bonded to the sleeve.

16 . The air suspension strut as claimed in claim 13 , wherein the bearing socket has a second encircling annular stop on which the sealing element is mounted.

17 . A motor vehicle having an air suspension strut comprising:
an air spring having an air spring cover and a rolling piston; a shock damper integrated with the air spring and having a damper tube, and a piston rod receivable within the damper tube; a rolling bellows, composed of an elastomer material, secured pressure-tightly between the air spring cover and the rolling piston thereby delimiting a volume-elastic pressure chamber filled with compressed air, and wherein the rolling bellows rolls on the rolling piston with a rolling fold being formed; a damper bearing accommodated in a bearing socket of the air spring cover and connected to the piston rod, wherein the damper bearing comprises a supporting piece, an elastomer body, and a sleeve; a closure element inserted in the bearing socket above the damper bearing; and an elastic element arranged between the sleeve and the closure element.

18 . The motor vehicle as claimed in claim 17 , wherein the elastic element is configured, in operative connection with the closure element, to exert a force on the sleeve.

19 . The motor vehicle as claimed in claim 17 , wherein the sleeve comprises a flange, between which the elastic element and the closure element are arranged.

20 . The motor vehicle as claimed in claim 19 , wherein the flange projects radially outward.

Assignees

• Continental Teves Ag & Co Ohg

Inventors

• Pielock Ralf
• Nessel Andreas

Classifications

• F16F9/0454

  characterised by the assembling method or by the mounting arrangement, e.g. mounting of the membrane (F16F9/0409, F16F9/0445 take precedence) · CPC title

• B60G15/02

  having mechanical spring · CPC title

• B60G15/14 Primary

  the damper being connected to the stub axle and the spring being arranged around the damper · CPC title

• F16F9/369

  Sealings for elements other than pistons or piston rods, e.g. valves · CPC title

• F16F9/057 Primary

  characterised by the piston · CPC title