Stabilizer Bushing Separation Surface Design

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Solution Overview

Problem

Existing stabilizer bushings face durability issues due to the formation of separation surfaces, which can lead to deformation and reduced performance when subjected to forces from the stabilizer bar and vehicle-body-side components during mounting.

Innovation Solution

The stabilizer bushing features at least one separation surface located on an outer surface, distinct from the force-receiving portions, preventing opening and deformation by distributing forces effectively, and allowing for easy mounting on the stabilizer bar, even when divided into partial bushings.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If a separation surface is formed in the stabilizer bushing to enable easy mounting, then the ease of operation is improved, but the durability is worsened due to deformation at the separation surface under force

Engineering Contradiction:
Improveease of mountingVSAvoiddurability
Core Design Contradiction:
Ease of operationVSReliability

Solution Approach 1:

The stabilizer bushing is divided into a first stabilizer bushing and a second stabilizer bushing separated by a separation surface, allowing the bushing to be mounted more easily on the stabilizer bar while maintaining overall structural integrity through proper positioning of the separation surface

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The separation surface is specifically positioned in a region where it does not overlap with the force receiving region, creating different functional zones: one optimized for easy separation and mounting, and another optimized for withstanding mechanical forces without deformation

Inventive Principle:
Principle #3Local quality

2Ease of manufacture

If the separation surface extends over the entire length of the bushing, then the ease of manufacture is improved, but the stability of the object's composition is worsened due to potential opening at the separation surface

Engineering Contradiction:
Improveease of manufacturingVSAvoidstructural integrity
Core Design Contradiction:
Ease of manufactureVSStability of the object's composition

Solution Approach 1:

The bushing is segmented by a separation surface that extends along the axial direction, facilitating manufacturing and assembly while the strategic positioning ensures the segment interfaces do not compromise overall structural stability under load

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The separation surface is pre-positioned in a location that anticipates force application patterns, ensuring that under normal operating conditions, the separation surface remains closed and the bushing maintains its compositional stability

Inventive Principle:
Principle #10Preliminary action

Data Source

PatentUS9931902B2Stabilizer bushing and stabilizer-bar mounting device
Publication Date: 2018.04.03 TOYOTA JIDOSHA KK
  • US9931902B2 patent drawing
  • US9931902B2 patent drawing
  • US9931902B2 patent drawing

AI summary

A stabilizer bushing has a holding hole for holding a stabilizer bar and is to be mounted on a mounting surface of a vehicle-body-side component. A normal line to the mounting surface extends in a direction intersecting an up and down direction of a vehicle. The stabilizer bushing has at least one separation surface, one end portion of which is located on an inner circumferential surface opposed to the holding hole, and the other end portion of which is located on an outer surface of the stabilizer bushing at a position different from a rigid-component opposed portion opposed to the vehicle-body-side component. The at least one separation surface has a first separation surface located nearer to the rigid-component opposed portion than a plane extending through a central axis of the holding hole and parallel with the rigid-component opposed portion.