Antivibration Device Stopper Rubber Anti-Turning Mechanism

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Solution Overview

Problem

Existing antivibration devices fail to prevent the stopper rubber from turning up when the connecting member is inserted between the first attached member and the displacement restriction member, leading to manufacturing challenges and potential misalignment.

Innovation Solution

Incorporating a hook portion on the stopper rubber and an engaged portion on the connecting member, which engage when the connecting member is inserted, along with a protrusion on the first attached member to enhance positioning accuracy and prevent rotation, thereby securing the stopper rubber in place.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of manufacture

If the stopper rubber is mounted only on the upper surface of the connecting member, then the manufacturing process becomes simpler, but the stopper rubber turns up when the connecting member is inserted, causing misalignment and manufacturing challenges

Engineering Contradiction:

Improvesimplicity of stopper rubber mountingVSAvoidpositioning accuracy of stopper rubber

Core Design Contradiction:

Ease of manufactureVSManufacturing precision

Solution Approach 1:

The stopper rubber is divided into two functional portions: a mounted portion that covers the upper surface of the connecting member, and a hook portion that extends laterally to engage with the connecting member. This segmentation allows the stopper rubber to be mounted simply on the upper surface while the hook portion prevents turning up during insertion, resolving the contradiction between manufacturing simplicity and positioning accuracy.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The hook portion acts as an intermediary element between the stopper rubber and the connecting member. It provides a mechanical engagement feature that prevents the stopper rubber from turning up during insertion, thereby ensuring positioning accuracy without complicating the mounting process. The engaged portion on the connecting member serves as the corresponding intermediary structure.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Manufacturing precision

If the stopper rubber is covered on both upper surface and lateral surface, then the stopper rubber remains stable during insertion, but the structure becomes more complex and difficult to manufacture

Engineering Contradiction:

Improvepositioning accuracy of stopper rubberVSAvoidstructural complexity of stopper rubber

Core Design Contradiction:

Manufacturing precisionVSDevice complexity

Solution Approach 1:

Rather than covering the entire lateral surface, the stopper rubber is segmented into a mounted portion for upper surface coverage and a specific hook portion for lateral engagement. This selective segmentation provides the necessary stability during insertion while avoiding the complexity of a fully enclosed lateral coverage structure.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The stopper rubber applies coverage locally where needed: the mounted portion covers the upper surface for general protection, while the hook portion provides localized lateral coverage only at the engagement area. This local quality approach ensures stability during insertion without the complexity of comprehensive lateral coverage.

Inventive Principle:

Principle #3Local quality

3Device complexity

If no engagement feature is provided for the stopper rubber, then the structure is simpler, but the stopper rubber turns up during insertion causing manufacturing challenges

Engineering Contradiction:

Improvestructural simplicityVSAvoidpositioning accuracy of stopper rubber

Core Design Contradiction:

Device complexityVSManufacturing precision

Solution Approach 1:

The stopper rubber is segmented to include a hook portion that provides a simple engagement feature with the connecting member. This minimal segmentation creates an effective anti-turning mechanism without adding significant structural complexity, maintaining simplicity while ensuring positioning accuracy.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The hook portion and engaged portion form a simple intermediary engagement mechanism that prevents the stopper rubber from turning up during insertion. This minimal intermediary structure provides the necessary positioning control without complicating the overall device design.

Inventive Principle:

Principle #24Intermediary (Mediator)

Data Source

PatentUS10421346B2Antivibration device

Publication Date: 2019.09.24 TOYO TIRE CORP

AI summary

An antivibration device capable of restraining a stopper rubber from being turned up when a connecting member is inserted between a first attached member and a displacement restriction member. A stopper rubber is mounted on a surface of a connecting member opposite to a first attached member and includes a mounted portion brought into abutment on a displacement restriction member when the connecting member is displaced in a rebound direction, and a hook portion formed at the outer edge of the mounted portion. The connecting member includes an engaged portion (protrusion) engaged with the hook portion. Thus, when the connecting member is inserted between the first attached member and the displacement restriction member, the stopper rubber (the mounted portion) can be restrained from being turned up.