US 7,487,957 B2 · Pneumatic spring vibration damper assembly unit

Abstract

A pneumatic spring-vibration damper unit is provided for absorbing shocks on wheels and chassis parts of motor vehicles. A variable air chamber is delimited by a rolling bellows which is disposed between a first subassembly that is fixed to the vehicle body and is provided with a vibration damper system and a second subassembly that is fixed to the vehicle chassis and is movable therewith. A piston rod connects the first subassembly located at the vehicle body end and the second subassembly located at the chassis end and whose free end located at the vehicle body end is accommodated inside a cylinder tube of the vibration damper system so as to be longitudinally movable by means of a piston. The piston rod (8) is guided within the cylinder tube (6) of the vibration damper system (2) so as to be longitudinally movable with the aid of a drag bearing arrangement (13). This allows the longitudinal axis of the piston rod to be angularly deflected relative to the central longitudinal axis (18) of the cylinder tube (6) while a joining element (10) which is fastened to the piston rod (8) and the piston (9) by a respective ball-and-socket joint unit (11, 12) is positioned between the piston rod (8) and the piston (9).

Claims20

Dependent claims

A pneumatic spring vibration damper assembly unit for the suspension of wheels and chassis components of motor vehicles, the pneumatic spring vibration damper assembly unit comprising:

a roll bellows, with a variable air chamber delimited by said roll bellows;
a first assembly unit;
a second assembly unit, said roll bellows being arranged between said first assembly unit, which is fixed on the body side and is provided with a vibration damper system, and a second assembly unit, which is fixed to the chassis of the motor vehicle and is able to move together with same;
a cylinder tube;
a piston;
a piston rod, which connects the first, body-side assembly unit and the second, chassis-side assembly unit, and which is accommodated at a body-side free end by means of said piston in an interior space of said cylinder tube of the vibration damper system in a longitudinally displaceable manner, said piston rod being guided longitudinally displaceably within said cylinder tube of said vibration damper system in a drag bearing arrangement, which makes possible angular deflections of the longitudinal axis of the piston rod in relation to said central longitudinal axis of said cylinder tube;
and
a connecting element fixed to said piston rod and to said piston by means of a ball-and-socket joint each, is arranged between said piston rod and said piston.

5 more elements

A pneumatic spring vibration damper assembly unit for a motor vehicle wheel and chassis component suspension, the pneumatic spring vibration damper assembly unit comprising:

a first assembly unit fixed on the body side of the motor vehicle;
a second assembly unit fixed to the chassis of the motor vehicle movable therewith;
a roll bellows defining a variable air chamber, said roll bellows being arranged operatively between said first assembly unit and said second assembly unit;
a cylinder tube connected to said first assembly unit;
a piston in an interior space of said cylinder tube and moveable therein in a longitudinally displaceable manner;
a piston rod;
a drag bearing arrangement, said piston rod being guided longitudinally displaceably within said cylinder tube of said vibration damper system in said drag bearing arrangement to make possible angular deflections of a longitudinal axis of the piston rod in relation to a central longitudinal axis of said cylinder tube;
and
a connecting element including a ball-and-socket joint at an end of said piston rod and a ball-and-socket joint carried by said piston, said connecting element being arranged between said piston rod and said piston.

6 more elements

Dependencies are inferred from the claim text.

Pneumatic spring vibration damper assembly unit

Life of this patent

Pneumatic spring vibration damper assembly unit

Life of this patent

Abstract

Claims20