Vibration Damping Bushing Axial Latching Mechanism
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Solution Overview
Problem
Conventional vibration damping bushings face instability in preventing the stopper member from slipping out, leading to inadequate resistance and potential failure under shock loads, which compromises vehicle stability and rubber durability.
Innovation Solution
A vibration damping bushing design featuring a latching depression on the inner axial member and a latching piece on the stopper member, engaged to prevent slipping out, along with a second stopper mechanism using a flange portion, ensures stable resistance and improved durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the stopper member is press-fitted onto the inner axial member only by pressing, then the assembly process is simple, but the resistance force is insufficient and the stopper member may slip out under shock loads
Solution Approach 1:
The invention transitions from a simple press-fit connection (one-dimensional radial interference) to a multi-dimensional retention system combining radial press-fit with axial latching. The latching depression and latching piece create an axial dimension of retention, preventing stopper member displacement in the axial direction while maintaining the simplicity of press-fit assembly.
Solution Approach 2:
The latching piece is nested within the latching depression, creating a interlocking mechanism where the stopper member's latching piece fits into the inner axial member's latching depression. This nested structure provides mechanical interlocking that prevents slip-out while maintaining compact assembly.
2Ease of manufacture
If the stopper member is press-fitted onto the inner axial member only by pressing, then the manufacturing process is simple, but the stopper effect cannot be exerted stably under large shock loads
Solution Approach 1:
The retention mechanism is enhanced by adding an axial latching dimension to the traditional radial press-fit connection. The latching depression extending in the axial direction and the latching piece engaging with it create resistance force in the axial direction, substantially increasing the stopper member's ability to withstand shock loads.
Solution Approach 2:
The retention system combines two different retention mechanisms: radial interference fit (press-fit) and axial mechanical interlocking (latching). This composite retention approach provides both easy assembly and high resistance force, combining the advantages of both mechanisms while mitigating their individual weaknesses.
3Reliability
If a latching depression and latching piece are added to prevent slip-out, then the stopper member retention is improved, but the device complexity increases
Solution Approach 1:
The latching mechanism is implemented locally at specific positions on the stopper member and inner axial member, rather than requiring a complete redesign of the entire assembly. The latching depression is provided at a specific location on the inner axial member, and the latching piece is provided at a corresponding location on the stopper member, minimizing structural complexity while achieving reliable retention.
Solution Approach 2:
The retention function is segmented into two distinct mechanisms: the press-fit connection for assembly and the latching mechanism for retention. This segmentation allows each mechanism to be optimized independently - the press-fit for ease of assembly and the latching for reliable retention - while maintaining overall system simplicity.
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 prevents stopper member displacement, enhancing vehicle stability and rubber durability by providing substantial resistance and maintaining the stopper effect, even under high loads.
Implementation Method 1
a main rubber elastic body that elastically connects the inner axial member and the outer cylindrical member
Implementation Method 2
a vibration damping bushing used for vibration damping connection
Implementation Method 3
the latching piece is engaged with the latching depression so as to provide a slipping out prevention mechanism
Data Source
AI summary
A vibration damping bushing including: an inner axial member; an outer cylindrical member through which the inner axial member is inserted; a main rubber elastic body elastically connecting the two members; and a stopper member that is fitted onto the inner axial member as a component of a first stopper mechanism that limits relative displacement of the inner axial member against the outer cylindrical member to one side in an axial direction. The inner axial member is formed with a latching depression that opens toward an outer periphery thereof, and the stopper member is provided with a latching piece that protrudes outward in the axial direction. The latching piece is engaged with the latching depression so as to provide a slipping out prevention mechanism for preventing the stopper member from slipping out from the inner axial member.