Torsion Bar Shock Absorber With Adjustable Stroke

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Solution Overview

Problem

Existing shock absorbers in transportation tools have complex structures, high manufacturing costs, and poor shock absorption effects, leading to a poor riding experience due to their inability to adjust stroke.

Innovation Solution

A shock absorber with a simple structure comprising a first rotating arm, a second rotating arm pivotally coupled to the first, and a torsion bar spring, where the included angle between the arms is set, allowing for torsional deformation to absorb vibrations, and an adjustable stroke without replacing the spring.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If traditional compression spring shock absorbers are used, then shock absorption function is provided, but structure becomes complex and manufacturing cost increases

Engineering Contradiction:
Improveshock absorption effectVSAvoidstructure complexity
Core Design Contradiction:
ReliabilityVSDevice complexity

Solution Approach 1:

The shock absorber is divided into two rotating arms connected by a pivot, with the torsion bar spring connecting them. This segmentation allows the spring to be positioned externally rather than compressed internally, simplifying the overall structure while maintaining shock absorption functionality.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

Instead of using a compression spring that requires complex housing and mounting structures, the patent inverts the approach by using a torsion bar spring that works through rotational deformation. The spring is mounted externally on the rotating arms, turning a potentially complex compression mechanism into a simpler torsional system.

Inventive Principle:
Principle #13The other way round (Inversion)

2Ease of manufacture

If fixed stroke shock absorbers are used, then manufacturing is simplified, but adaptability to different road conditions deteriorates

Engineering Contradiction:
Improvemanufacturing simplicityVSAvoidstroke adjustability
Core Design Contradiction:
Ease of manufactureVSAdaptability or versatility

Solution Approach 1:

The shock absorber incorporates an adjustable pivot position that allows the stroke length to be dynamically changed. By moving the pivot along the rotating arms to different positions, the effective stroke can be adjusted without replacing the torsion bar spring, enabling adaptation to various road conditions while keeping the basic structure simple.

Inventive Principle:
Principle #15Dynamics

3Reliability

If complex shock absorber structures are used, then shock absorption capability is maintained, but riding comfort deteriorates due to inability to adjust stroke

Engineering Contradiction:
Improveshock absorption capabilityVSAvoidriding comfort
Core Design Contradiction:
ReliabilityVSEase of operation

Solution Approach 1:

The adjustable pivot position enables the shock absorber stroke to be dynamically adapted to different riding conditions and rider preferences. This dynamic adjustment capability improves riding comfort by allowing optimization of shock absorption characteristics without complicating the fundamental structure.

Inventive Principle:
Principle #15Dynamics

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

The shock absorber provides a comfortable and effective shock absorption experience with a simple structure, allowing for adjustable stroke to accommodate various road conditions, improving the riding experience and applicability to both front and rear wheels.

Implementation Method 1

the torsion bar spring undergoes torsional deformation, thereby achieving absorption of the vibration

Methodology Applied
Scientific EffectTorsional deformation: Torsion Spring

Data Source

PatentUS11815156B2Shock absorber and transportation tool
Publication Date: 2023.11.14 NINEBOT (CHANGZHOU) TECH CO LTD
  • US11815156B2 patent drawing
  • US11815156B2 patent drawing
  • US11815156B2 patent drawing

AI summary

A shock absorber and a transportation tool. The shock absorber includes a first rotating arm; a second rotating arm pivotally coupled to the first rotating arm; and a torsion bar spring having a first end coupled to the first rotating arm and a second end coupled to the second rotating arm, wherein an included angle between the first rotating arm and the rotating arm has a set value. The shock absorber has a simple structure and good shock absorption effect and adjustable stroke.