Stabilizer Bush Axial Movement Prevention via Resin Ring
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Solution Overview
Problem
Existing stabilizer devices face challenges in preventing bush movement relative to the bar during vehicle cornering, especially under size restrictions, leading to unequal effects and insufficient frictional force due to limited contact area.
Innovation Solution
A stabilizer device featuring a tubular resin member fixed between the bush and the bar, with a length equal to or greater than the bush, providing axial stability and securing a sufficient contact area for frictional resistance, utilizing a resin material to prevent bush movement and enhance adhesion through surface roughening and flanges.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a stopper member is disposed proximate to the bush to prevent bush movement, then bush movement is prevented, but device size increases and contact area between stopper member and bar becomes insufficient
Solution Approach 1:
The patent merges the stopper member function with the tubular resin member by making the tubular resin member itself act as the stopper. The tubular resin member is disposed between the bush and the bar, and its outer peripheral surface contacts the inner peripheral surface of the bush, preventing bush movement in the axial direction without requiring a separate stopper member structure.
Solution Approach 2:
The tubular resin member serves multiple functions simultaneously: it acts as both the stopper member for preventing bush movement and provides frictional resistance through its contact area with the bar. This multi-functionality eliminates the need for a dedicated stopper member structure.
2Device complexity
If device size is restricted severely, then compact design is achieved, but contact area of stopper member and bar for frictional force becomes insufficient
Solution Approach 1:
The patent changes the parameter of contact area by making the length of the tubular resin member equal to or longer than the length of the bush in the axial direction. This ensures that the contact area between the tubular resin member and the bar is sufficient to generate the required frictional force, even under severe size restrictions.
3Reliability
If the bush moves relatively to the bar during cornering, then centrifugal force effects are reduced, but stabilizer device effectiveness becomes unequal at left and right sides
Solution Approach 1:
The tubular resin member acts as an intermediary between the bush and the bar, preventing relative movement between them. By securing the bush axially through this intermediary structure, the patent ensures that centrifugal force effects are transmitted equally and effectively to both the left and right sides during cornering.
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 solution effectively prevents bush movement along the bar even under severe size constraints, ensuring high frictional strength and maintaining vehicle roll stability during cornering by securing the bush's axial direction movement.
Implementation Method 1
the contact area between the bar and the resin member can be secured by using the size of the bush. Thus, the movement strength (the strength against the force by which the bar moves to the resin member) due to frictional resistance between the bar and the resin member can be obtained
Data Source
Figure 1
Figure 2
Figure 3A~3B
AI summary
A stabilizer device 1 includes a bar 100 having a portion 10a to be mounted to a vehicle body. A resin ring 40 is integrally formed to the bar 100 by a direct injection method, and a bush 30 made of rubber is provided around the periphery of the resin ring 40. The bush 30 is fixed to a member 50 of the vehicle body side by a bracket 20. Since the contact area of the resin ring 40 to the bar 100 is secured by using the axial direction length of the bush 30, the movement strength of the bush 30 in the axial direction can be improved even when there is size restriction. In the fixing construction of the stabilizer device, the movement of the bush to the bar can be sufficiently prevented even when the size restriction is severe.