Electromagnetic Shock Absorber Length Adjustment Without Disassembly

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Solution Overview

Problem

Conventional shock absorbers require disassembly and adjustment of hard points for height adjustment, which is inconvenient and labor-intensive.

Innovation Solution

A shock absorber with an adjustment assembly comprising a stator and rotor, allowing for electromagnetic rotation of the connection end relative to the outer cylinder, enabling height adjustment without disassembly.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If conventional shock absorber with fixed hard points is used, then structural stability is maintained, but height adjustment requires disassembly and extensive work

Engineering Contradiction:
Improveheight adjustment convenienceVSAvoidadjustment mechanism complexity
Core Design Contradiction:
Ease of operationVSDevice complexity

Solution Approach 1:

The shock absorber transitions from a static fixed-structure design to a dynamic adjustable design. The connection end can rotate relative to the outer cylinder through electromagnetic cooperation between stator and rotor, enabling the shock absorber length to be dynamically adjusted without disassembly, thus improving ease of operation while maintaining acceptable device complexity through integrated electromagnetic components.

Inventive Principle:
Principle #15Dynamics

Solution Approach 2:

The patent replaces traditional mechanical adjustment mechanisms (which would require disassembly of hard points) with an electromagnetic adjustment system. The electromagnetic cooperation between stator and rotor provides rotational motion to the connection end, substituting complex mechanical disassembly operations with a more convenient electromagnetic actuation system.

Inventive Principle:
Principle #28Mechanics substitution (Replace mechanical system)

2Productivity

If electromagnetic adjustment assembly is added, then height adjustment convenience is improved, but device complexity increases

Engineering Contradiction:
Improveadjustment operation efficiencyVSAvoidadjustment assembly structure
Core Design Contradiction:
ProductivityVSDevice complexity

Solution Approach 1:

The electromagnetic adjustment assembly serves multiple functions: the stator and rotor provide both electromagnetic actuation and threaded engagement for rotational motion, the connection end integrates both structural support and adjustable connection functions, and the recessed structure accommodates both the electromagnetic components and the adjustment mechanism within the existing shock absorber footprint. This multi-functionality improves productivity while limiting the increase in device complexity.

Inventive Principle:
Principle #6Universality (Multi-functionality)

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

Facilitates convenient and labor-saving adjustment of vehicle body height by rotating the connection end into or out of the receiving recess, reducing operational workload.

Implementation Method 1

The rotor is driven to rotate through an electromagnetic cooperation between the stator and the rotor

Methodology Applied
Scientific EffectElectromagnetic force: Lorentz Force

Implementation Method 2

The rotor is in threaded engagement with the connection end. The rotor is driven to rotate... to drive the connection end to rotate out of or into the receiving recess

Methodology Applied
Scientific EffectScrew mechanism: Screw

Data Source

PatentEP4692590A1Shock absorber and vehicle
Publication Date: 2026.02.11 ZHEJIANG ZEEKR INTELLIGENT TECH CO LTD
  • EP4692590A1 patent drawingFigure 1
  • EP4692590A1 patent drawingFigure 2
  • EP4692590A1 patent drawingFigure 3

AI summary

Provided are a shock absorber (100) and a vehicle (1000). The shock absorber (100) is applied in the vehicle (1000). The shock absorber (100) includes a wishbone (10), an outer cylinder (20), and an adjustment assembly (30). The wishbone (10) has a receiving recess (12). The outer cylinder (20) includes a connection end (22). The adjustment assembly (30) includes a stator (32) fixedly disposed on the wishbone (10) and a rotor (35) rotatably disposed in the receiving recess (12). The rotor (35) is in threaded engagement with the connection end (22). The rotor (35) is driven to rotate through an electromagnetic cooperation between the stator (32) and the rotor (35) to drive the connection end (22) to rotate out of or into the receiving recess (12), adjusting a length of the shock absorber (100).