Spring and shock absorber unit for air-suspended vehicle

US6722640B2 · kind B2 · utility

Assignee

• ZF Sachs AG · DE

Inventors

• Georg Memmel · Hamm (Sieg), DE
• Wolfgang Kolb · Schweinfurt, DE
• Roland Berghaus · Lindlar, DE
• Burchard Michels · Much, DE
• Bernd Rhein · Overath, DE

Key dates

• Filing date: Feb 25, 2003
• Grant date: Apr 20, 2004
• Expiry date: Feb 25, 2023

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B60G2204/422
• WIPO field: Transport
• WIPO sector: Mechanical engineering

Abstract

A U-type bellows air spring is supported on one side relative to the vehicle frame and on the other side relative to the axle or a longitudinal control arm guiding the latter. The lower end of the U-type bellows is fastened on the longitudinal control arm side in a pressure-tight manner to a flange of a supporting element, and a vibration absorber protrudes through the supporting element. A piston cylinder of the vibration absorber is connected to the longitudinal control arm via a joint, and a piston rod on the longitudinal axis of the air spring is supported relative to the vehicle frame. To keep the amount of sealing for the air spring small even if it is not used very much, the supporting element for the lower end of the U-type bellows is arranged rigidly with respect to the piston cylinder of the vibration absorber. A preferably cylindrical circumferential surface for the U-type bellows to roll along during the compression and rebound action extends from the flange toward the longitudinal control arm.