Sliding Bushing Liner Mesh for Directional Spring Properties
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Solution Overview
Problem
Conventional suspension bushings struggle to achieve both high spring properties in the axis-perpendicular direction and low spring properties in the torsional direction, as allowing relative rotation between the shaft member and the rubber-like elastic body compromises the required properties in the axis-perpendicular direction.
Innovation Solution
A sliding bushing design featuring an inner shaft member with a bulge part and a braided cloth-like sliding liner, where the liner is non-adhesive and slidable, with varying braid mesh coarseness to allow for both high and low spring properties in different directions, utilizing a main rubber elastic body connected to an outer tube member.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a braided cloth-like sliding liner with uniform braid mesh is used, then sliding is allowed between the inner shaft member and main rubber elastic body, but both high spring properties in axis-perpendicular direction and low spring properties in torsional direction cannot be achieved simultaneously
Solution Approach 1:
The sliding liner transitions from a uniform structure to a non-uniform structure with locally differentiated braid mesh coarseness. The coarse part provides easier sliding for torsional rotation, while the fine part provides greater restraint for axis-perpendicular movements, allowing the single component to deliver directionally dependent mechanical properties.
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 design effectively achieves hard spring properties in the axis-perpendicular direction while maintaining soft spring properties in the torsional and prying directions by reducing sliding resistance and allowing for controlled deformation of the rubber elastic body.
Implementation Method 1
a main rubber elastic body connected to an outer tube member
Implementation Method 2
A braided cloth-like sliding liner is arranged between the inner shaft member and the main rubber elastic body so as to be non-adhesive and slidable with respect to the inner shaft member
Data Source
AI summary
Provided is a sliding bushing in which sliding of an inner shaft member with respect to a main rubber elastic body is allowed. The inner shaft member includes a bulge part provided midway in an axial direction. A braided cloth-like sliding liner is arranged between the inner shaft member and the main rubber elastic body so as to be non-adhesive and slidable with respect to the inner shaft member. In a portion of the sliding liner arranged on an outer periphery with respect to a large diameter part of the bulge part of the inner shaft member, a coarse part is provided of coarser braid mesh than a portion of the sliding liner arranged on an outer periphery with respect to a small diameter part on both axial sides of the large diameter part.