Suspension strut for a motor vehicle with a height-adjustment device
First Claim
1. A damper and spring unit for a vehicle suspension comprising a damper having a longitudinal axis (z), a spring member extending coaxially to the damper, a bottom spring plate against which the spring member rests at its bottom and a vehicle height adjustment device for adjusting the height of the vehicle from the ground,wherein the damper includes a first damper element adapted to be firmly connected to a wheel carrier of the suspension and a second damper element slidable relative to the first damper element along the longitudinal axis (z),wherein the adjustment device is interposed between the first damper element and the spring member to change in a controlled manner the linear position of the bottom spring plate, and hence of a bottom end of the spring member, relative to the first damper element along the longitudinal axis (z) and is made as a hydraulic linear actuator comprising a cylinder firmly secured to the first damper element and a piston connected to the bottom spring plate so as to be drivingly connected for translation therewith along the longitudinal axis (z) of the damper between a bottom end-of-travel position, corresponding to the minimum height of the vehicle from the ground, and a top end-of-travel position, corresponding to the maximum height of the vehicle from the ground, andwherein the piston of the adjustment device is arranged, at least for the largest part of its longitudinal size, within the spring member.
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Accused Products
Abstract
The damper and spring unit comprises a damper, a spring member extending coaxially to the damper, a bottom spring plate and a vehicle height adjustment device for adjusting the height of the vehicle from the ground. A first damper element is connected to a wheel carrier of the suspension and a second damper element is slidable relative to the first damper element along the longitudinal axis (z). The adjustment device is interposed between the first damper element and the spring member to change the linear position of the bottom spring plate, and a bottom end of the spring member, relative to the first damper element. A hydraulic linear actuator comprising a cylinder is secured to the first damper element and a piston drivingly connected for translation with the bottom spring plate along the longitudinal axis (z) of the damper between a bottom end-of-travel position and a top end-of-travel position.
14 Citations
7 Claims
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1. A damper and spring unit for a vehicle suspension comprising a damper having a longitudinal axis (z), a spring member extending coaxially to the damper, a bottom spring plate against which the spring member rests at its bottom and a vehicle height adjustment device for adjusting the height of the vehicle from the ground,
wherein the damper includes a first damper element adapted to be firmly connected to a wheel carrier of the suspension and a second damper element slidable relative to the first damper element along the longitudinal axis (z), wherein the adjustment device is interposed between the first damper element and the spring member to change in a controlled manner the linear position of the bottom spring plate, and hence of a bottom end of the spring member, relative to the first damper element along the longitudinal axis (z) and is made as a hydraulic linear actuator comprising a cylinder firmly secured to the first damper element and a piston connected to the bottom spring plate so as to be drivingly connected for translation therewith along the longitudinal axis (z) of the damper between a bottom end-of-travel position, corresponding to the minimum height of the vehicle from the ground, and a top end-of-travel position, corresponding to the maximum height of the vehicle from the ground, and wherein the piston of the adjustment device is arranged, at least for the largest part of its longitudinal size, within the spring member.
Specification