Vibration damper with a hydraulic end stop

Abstract

The invention relates to a vibration damper (1) with a hydraulic end stop (2), comprising a cylinder (3) which radially bounds a cylinder space (31) filled with damping medium, and is axially bounded on at least one side by a closure element (5), a piston rod (4) which is guided axially within a cylinder space (31) filled with a damping medium, penetrates a piston rod guide (51) and is connected to a piston (6), and a control space (71) formed at one end of the cylinder (3), wherein the hydraulic end stop (2) has an end stop ring (8), wherein the latter is fixed axially to the piston rod (4) and engages radially around the piston rod (4), and in the end stroke region of the piston, the end stop (2) enters the control space (71) and axially bounds the latter on one side such that a control chamber (71a) which is bounded axially at one end by the closure element (5); at the other end by the end stop (2) is produced within the control space (71), wherein the volume of the control chamber (71a) is changeable depending on the axial position of the end stop (2) in the control space (71). The vibration damper is distinguished in that the hydraulic end stop (2) has a sealing ring (9) which is arranged between the end stop ring (8) and the closure element (5), is supported axially on one side on the end stop ring, engages radially around the piston rod (4), is mounted in a sliding manner on the piston rod (4) and bears radially with the outer circumferential surface (91) thereof AGAinst the inner wall of the control space (71), wherein the sealing ring (9) has at least one radial constricting groove (92) which becomes effective on entry of the end stop (2) together with the sealing ring (9) into the control space (71); and ensures a defined flow of damping means between the control chamber (71a) and the first working space (31a), and wherein the sealing ring (9) has a multiplicity of spring tongues (93) which are supported on a supporting surface (42) on the piston-rod side.

Description

technical field [0001] The invention relates to a hydraulic end stop according to claim 1 [0002] the shock absorber. Background technique [0003] In recent years, shock absorbers with hydraulic end stops have been used in the automotive industry. For reasons of comfort, the damping force of the shock absorber cannot be adjusted to any size. As a result, in the case of extremely extreme road impacts, the damping force is not always sufficient to dampen body movements. As a result, the axle or shock absorber can enter the elastic limit at high speed. To absorb impact energy, elastic end stops made of elastic material are usually used. However, the energy absorption of these components is very limited due to material reasons. In contrast, hydraulically applied end stops can absorb significantly higher impact energies. [0004] Document DE 2853914 A1 describes a shock absorber with a mechanical hydraulic end stop. The mechanohydraulic end stop disclosed here provides a...

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Problems solved by technology

However, the energy absorption of these components is very limited due to the material

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