Vibration Damping Device Rotation Prevention Mechanism
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Solution Overview
Problem
Existing vibration damping devices face challenges in preventing relative rotation between the first mounting member and the tubular bracket, leading to difficulties in aligning components during mounting and potential reduced productivity, especially when the spring properties differ between directions.
Innovation Solution
A vibration damping device design featuring a main rubber elastic body with a frustoconical shape, a first mounting member, a second mounting member, a rebound abutting portion, a stopper abutting portion, and a cushioning rubber that forms a rebound stopper mechanism and a rotation preventing mechanism, where the cushioning rubber is housed within the tubular bracket with aligned abutting faces to prevent rotation and ensure proper alignment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the first mounting member and the main rubber elastic body are formed independently and assembled in an unattached state, then the durability is improved by preventing tensile stress, but the relative rotation between components occurs during shipping or storage
Solution Approach 1:
The patent applies preliminary action by pre-aligning the first mounting member and the tubular bracket in a specific circumferential orientation before assembly. The mounting member is positioned with its reference mark aligned with the tubular bracket during assembly, ensuring that no relative rotation occurs during shipping or storage. This preliminary positioning action prevents the need for alignment operations during installation while maintaining the independent formation structure that prevents tensile stress.
2Manufacturing precision
If the first mounting member and the tubular bracket are positioned with specific orientation, then the mounting precision is improved, but the productivity is reduced due to additional alignment operations
Solution Approach 1:
The patent applies self-service by designing the first mounting member with self-aligning features including reference marks and positioning protrusions that automatically guide the mounting member into the correct circumferential orientation during assembly. The positioning protrusion fits into a corresponding recess in the tubular bracket, ensuring precise alignment without requiring manual measurement or adjustment operations. This self-aligning mechanism maintains high mounting precision while eliminating time-consuming alignment operations, thereby improving productivity.
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 allows for easy mounting of components without requiring alignment in the circumferential direction, enhances durability by minimizing undesirable deformation, and improves productivity by preventing relative rotation and maintaining proper orientation during shipping and installation.
Implementation Method 1
a main rubber elastic body of generally frustoconical shape overall; a first mounting member adapted to be fixed to one of the two components, and being of independent separate structure from the main rubber body
Implementation Method 2
a rebound stopper mechanism for cushion-wise limitation of relative displacement of the first mounting member and the second mounting member in the direction of moving apart (rebound direction)
Implementation Method 3
a first rotation preventing mechanism for preventing rotation of the first mounting member about a center axis of the tubular bracket by means of abutting contact of the pair of first abutting faces of the cushioning rubber against the pair of first abutted faces of the mating tube portion
Data Source
AI summary
A vibration damping device including a first and a second mounting member connected together by an elastic body, comprising a rebound abutting portion of flange shape integrally formed on the first mounting member; a tubular bracket fastened about the second mounting member; a stopper abutting portion formed at the tubular bracket; and a cushioning rubber disposed on the rebound abutting portion to constitute a rebound stopper mechanism for limiting relative displacement in an axially away direction between the first and second mounting members, wherein a first rotation preventing mechanism for preventing rotation of the first mounting member about a center axis of the tubular bracket by means of abutting contact of a pair of first abutting faces formed on the cushioning rubber against a pair of first abutted faces formed on a mating tube portion of the tubular bracket.