Hydraulic Shock Absorber Spring Receiver Segmentation

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Solution Overview

Problem

The existing hydraulic shock absorber design faces challenges in assembling the axle bracket with the axle-side tube due to the rotation force applied to the spring receiver, which can lead to engagement issues or damage to the spring receiver or spring load adjusting portion.

Innovation Solution

The hydraulic shock absorber incorporates a spring receiver divided into a base portion and a cylindrical portion, with the cylindrical portion being concentrically set to the axle-side tube, allowing for smooth engagement by preventing rotation of the spring receiver with respect to the axle bracket, thus enabling easy assembly without causing damage.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If the spring receiver is supported by the axle bracket so as to not rotate with respect to the axle bracket, then the spring load can be adjusted by vertically moving the spring receiver, but the axle bracket cannot be threadedly engaged with the axle-side tube due to rotation force applied to the spring receiver

Engineering Contradiction:

Improvespring load adjustment capabilityVSAvoidassembly ease of axle bracket

Core Design Contradiction:

Adaptability or versatilityVSEase of manufacture

Solution Approach 1:

The spring receiver is divided into two separate parts: the spring receiver base portion that remains engaged with the axle bracket, and the spring receiver cylindrical portion that is inserted into the axle-side tube. This segmentation allows the base portion to be prevented from rotating with the axle bracket while the cylindrical portion can be freely inserted into the axle-side tube without rotation constraints, thus resolving the contradiction between spring load adjustment capability and assembly ease.

Inventive Principle:

Principle #1Segmentation

2Stability of the object's composition

If the spring receiver is inserted so as to come in contact with the inner periphery of the axle-side tube, then the spring receiver is constrained radially, but the rotation force locks the spring receiver and prevents thread engagement of the axle bracket

Engineering Contradiction:

Improveradial constraint of spring receiverVSAvoidthread engagement operation

Core Design Contradiction:

Stability of the object's compositionVSEase of operation

Solution Approach 1:

By dividing the spring receiver into a base portion and a cylindrical portion, the radial constraint function is assigned to the cylindrical portion that contacts the inner periphery of the axle-side tube, while the base portion remains free to be engaged with the axle bracket without rotation locking. This segmentation allows radial constraint and thread engagement operations to occur independently without interfering with each other.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The function of radial constraint is extracted and assigned specifically to the spring receiver cylindrical portion, which is inserted into the axle-side tube. The spring receiver base portion is separated from this constraint function, allowing it to be freely rotated and engaged with the axle bracket during assembly without being locked by the radial constraint mechanism.

Inventive Principle:

Principle #2Taking out (Extraction)

3Adaptability or versatility

If the spring receiver is prevented from rotating with respect to the axle bracket, then spring load adjustment is enabled, but damage to the spring receiver or spring load adjusting portion may occur during assembly

Engineering Contradiction:

Improvespring load adjustment capabilityVSAvoiddamage resistance during assembly

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The spring receiver is segmented into a base portion that is prevented from rotating with the axle bracket (enabling spring load adjustment) and a cylindrical portion that is freely insertable into the axle-side tube (preventing damage during assembly). This segmentation ensures that the rotation prevention mechanism does not apply harmful forces to the spring receiver during the assembly process, as the cylindrical portion is not constrained to rotate with the axle bracket.

Inventive Principle:

Principle #1Segmentation

Data Source

PatentEP2113678B1Hydraulic shock absorber

Publication Date: 2017.11.22 SHOWA CORP

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AI summary

There is provided a hydraulic shock absorber (10) including a spring receiver (32) that is supported so as to be not rotatable with respect to the axle bracket (15). The spring receiver is divided into a spring receiver base portion (111) that has an outer diameter smaller than an inner periphery of an axle-side tube (12), and a spring receiver cylindrical portion (112) that is inserted into an inner periphery of the axle-side tube (12) and a suspension spring (33) is seated thereon. A lower end engagement portion (12A) provided at a lower end of the spring receiver cylindrical portion is seated on an upper end engagement portion (111A) provided at an upper end of the spring receiver base portion, so that the spring receiver cylindrical portion is concentrically set to the axle-side tube.