Shock absorbers with adjustable damping force

The shock absorber design uses a non-magnetic backpressure chamber and movable iron core to address magnetic flux transmission issues, achieving a compact and efficient damping force adjustment system.

DE112016004910B4Active Publication Date: 2026-01-22ASTEMO LTD
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Patent Information

Application Number
DE112016004910
Authority / Receiving Office
DE · DE
Patent Type
Patents
Current Assignee / Owner
Filing Date
2016-09-27
Publication Date
2026-01-22
Estimated Expiration
2036-09-27

AI Technical Summary

Technical Problem

Existing shock absorbers with electromagnetic damping force adjustment devices face issues with magnetic flux transmission and magnetic resistance due to the use of magnetic materials, leading to challenges in reducing the size and weight of the magnetic coil.

Method used

Incorporating a non-magnetic material for the backpressure chamber forming element and a movable iron core within the shock absorber design, which allows for a smaller magnetic coil and uniform magnetic flux transmission.

Benefits of technology

This configuration reduces the size and weight of the magnetic coil while maintaining effective magnetic flux transmission, enabling adjustable damping force control.

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Abstract

Shock absorbers with adjustable damping force, including: a coil (39) designed to generate a magnetic force by supplying current; a cap element (42) having a tube shape with a base and arranged on an inner peripheral side of the coil (39); a movable iron core (43) which is arranged on an inner peripheral side of the cap element (42) and is provided in such a way that it is movable in an axial direction of the shock absorber with adjustable damping force; a solid iron core (40) designed to attract the iron core (43); a shaft part (44) which is provided on an inner peripheral side of the iron core (43) and has a communication passage which is provided on an inner peripheral side thereof; a valve body (32) which is provided in the shaft part (44); a bushing (45A, 45B) designed to support the shaft part (32); and a counter-pressure chamber forming element (46) having a tubular shape with a bottom, one inner peripheral side of which is fitted to the bushing (45B), and which forms a counter-pressure chamber (47) between an end section of the shaft part (44) opposite the solid iron core and the bushing (45B), wherein the counter-pressure chamber forming element (46) is made of a non-magnetic material.
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Citation Information

Patent Citations

  • JP000H09506309A

  • JP002014011352A