End cap assembly for air spring

Spring devices – Vehicle – Comprising compressible fluid

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Details

F16F 954

Patent

active

047843764

ABSTRACT:
An air spring having a pair of spaced end members and an intervening tubular elastomeric sleeve with internal reinforcing cords forms a fluid pressure chamber for mounting between spaced portions of a vehicle to provide damping and to absorb road shock. Each of the end members has an end cap and a clamp ring provided with annular mating surfaces. The clamp ring is formed with an annular convex projection which extends into a larger annular concave recess formed in the end cap. When the ring and end cap are snapped axially together, two annular radially space areas of the sleeve are placed in compressive shear to provide a secure clamping engagement with the sleeve material. An annular expansion area is formed within the recess between the projection permitting the sleeve material located between the compressive shear areas to expand therein. The sleeve cords move through a direction change of approximately 180.degree.. The annular projection and annular recess form two radially spaced annular pinch areas on each of the end members, and the intervening expansion area ensures a change of direction of the reinforcement cord to securely clamp the sleeve ends therebetween eliminating any internal bead reinforcement on the sleeve. In a second embodiment helical thread-like mating projections formed on the end cap and clamp ring provide the two compressive shear pinch areas and intervening expansion area.

REFERENCES:
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patent: 2977134 (1961-03-01), Helling
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patent: 4506910 (1985-03-01), Bierens
patent: 4564177 (1986-01-01), Leonard

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