Contitech Luftfedersysteme Gmbh

Daimler Chrysler Ag

Joachim Frey

Gerhard Thurow

Christoph Bank

Paul Cerny

Peter Gönnheimer

Peter G&ouml;nnheimer

A double rolling-lobe flexible member spring arrangement () includes two coaxial spring components (and) which are arranged opposed to each other. The spring components essentially each include a rolling-lobe flexible member (and) and respective roll-off pistons (and). The two rolling-lobe flexible members (and) define a common double rolling-lobe flexible member () and the two spring components (and) have a common outer jacket (). A reliable effective fixing of the flexible member () to the inner side of the outer jacket () is ensured. To provide this fixation, the double rolling-lobe flexible member () has a support ring () lying centrally on the inner side thereof and this support ring has a radial recess () on its periphery. The outer jacket () has a peripherally-extending raised portion at its inner periphery which engages into the recess () of the support ring () and defines a clamp contour.

Double rolling-lobe spring arrangement

The sleeve-shaped rolling-lobe flexible member ( ) of a rolling-lobe spring ( ) is made of elastomeric material and is provided with a reinforcement layer. The ends of the sleeve-shaped rolling-lobe flexible member ( ) include neither beads nor cores. The rolling-lobe flexible member ( ) is attached pressure-tightly to a cover ( ) functioning as a connecting part and/or to a roll-off piston ( ) of the spring ( ). This pressure-tight attachment is achieved in that each clamping region ( ) of the connecting part (cover and/or roll-off piston ) is provided with a drawn-in connecting surface having at least one peripherally-extending raised portion ( ). Clamp rings ( ) are assigned to corresponding clamping regions ( ) of the connecting parts ( ). The clamp rings ( ) have respective peripherally-extending recesses ( ). The peripherally-extending raised portion ( ) provided at the attachment surface of the corresponding connecting part ( ) and/or the peripherally-extending recesses ( ) located in the corresponding clamp rings ( ) are configured to have a rectangular cross section whereby a form-tight connection of the reinforcement layer in combination with a redirection thereof results during the clamping process.

Rolling-lobe spring

In a rolling sleeve-type gas spring, particularly for a vehicle support structure, wherein the gas spring includes a cylinder, a piston received in the cylinder with an annular space formed therebetween and a rolling sleeve mounted to the piston and the cylinder and having a meniscus portion extending into the annular space from within the cylinder for containing gas under pressure in the cylinder, a second rolling sleeve is connected to the piston and the cylinder and extends into the annular space from without for preventing soiling of the surfaces of the piston and the cylinder defining the annular space.

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Schorndorf, Germany

Joachim Frey