Antivibration Device Upright Portion Space for Connecting Member

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Solution Overview

Problem

The existing antivibration device manufacturing process is complicated due to the need for two-step press-fitting, where the connecting member insertion between the displacement restriction member and the first attached member is challenging, leading to inefficiencies.

Innovation Solution

The antivibration device incorporates an upright portion with a space for connecting member insertion between the first attached member and the displacement restriction member, allowing for a single press-fitting step and simplifying the manufacturing process, with optional features like a covering rubber portion for shock absorption and a protrusion/receiving portion for enhanced positioning and stability.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Manufacturing precision

If the second attached member is press-fitted to the second position relative to the retainer member to compress the antivibration base body, then the antivibration base body is precompressed by a predetermined amount, but the connecting member cannot be inserted between the displacement restriction member and the first attached member

Engineering Contradiction:

Improveprecompression amount of antivibration base bodyVSAvoidinsertability of connecting member

Core Design Contradiction:

Manufacturing precisionVSEase of manufacture

Solution Approach 1:

The upright portion is designed to maintain a space between the first attached member and the displacement restriction member even when the second attached member is press-fitted to the second position. This preliminary structural arrangement allows the connecting member to be inserted before the press-fitting is completed, eliminating the need for two-step press-fitting operations.

Inventive Principle:

Principle #10Preliminary action

2Reliability

If two-step press-fitting is performed to insert the connecting member and compress the antivibration base body, then the connecting member can be fixedly fastened, but the manufacturing process becomes complicated

Engineering Contradiction:

Improvefixed fastening of connecting memberVSAvoidmanufacturing process steps

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The upright portion enables the combining of two separate operations (inserting the connecting member and compressing the antivibration base body) into a single press-fitting operation. The space maintained by the upright portion allows both the connecting member insertion and the base body compression to occur simultaneously during one continuous press-fitting process, thereby simplifying the manufacturing process while ensuring reliable fastening.

Inventive Principle:

Principle #5Merging (Combining)

3Volume of moving object

If the space between the first attached member and the displacement restriction member is reduced for compactness, then the device size is reduced, but the connecting member cannot be inserted

Engineering Contradiction:

Improvedevice compactnessVSAvoidconnecting member insertion

Core Design Contradiction:

Volume of moving objectVSEase of manufacture

Solution Approach 1:

The upright portion extends in the radial direction from the first attached member, creating a space in the radial dimension between the first attached member and the displacement restriction member. This radial extension allows the connecting member to be inserted without increasing the axial length of the device, thus maintaining compactness while providing sufficient insertion space.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

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

This design simplifies the manufacturing process by eliminating the need for two-step press-fitting, enhances shock absorption, and improves the accuracy and stability of the connecting member's positioning, thereby reducing manufacturing complexity and potential damage to components.

Implementation Method 1

an antivibration base body formed of a rubber-like elastic body and interconnecting the first attached member and the second attached member

Methodology Applied

Scientific EffectElasticity: Elasticity

Implementation Method 2

the antivibration base body being precompressed

Methodology Applied

Scientific EffectViscoelasticity: Viscoelasticity

Implementation Method 3

a covering rubber portion formed of a rubber-like elastic body and provided to cover at least an upright end surface of the upright portion

Methodology Applied

Scientific EffectElasticity: Elasticity

Data Source

PatentUS10414261B2Antivibration device

Publication Date: 2019.09.17 TOYOTA JIDOSHA KK

AI summary

An antivibration device capable of simplifying its manufacturing process with an antivibration base body being precompressed. A first attached member includes an upright portion upstanding toward a displacement restriction member, and when a second attached member is retained on a retainer member with an antivibration base body being precompressed, the interposition of the upright portion enables a space into which one side of a connecting member is insertable, to be formed between the first attached member and the displacement restriction member. Thus, after the completion of a step (for example, a press-fitting step) of retaining the second attached member of a mount body on the retainer member, the one side of the connecting member is inserted into the space between the first attached member and the displacement restriction member to be fixedly fastened to the first attached member.