Damping Member Support Bypassing Non-Torsional Forces

Solution Overview

Problem

Vehicles experience premature wear and damage due to non-torsional forces acting on powertrain components and torsional dampers, which existing torsional dampers are not designed to handle effectively.

Innovation Solution

A damping member support system that includes a shaft engagement portion, a damping member engagement portion, and an intermediate portion to transmit non-torsional forces around a torsional damping member, reducing the impact on powertrain components and extending the life of the damping member.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a torsional damper is used to reduce extreme torque and vibration values, then torsional force protection is improved, but the component becomes vulnerable to non-torsional forces such as axial and radial forces

Engineering Contradiction:

Improveprotection against torsional forceVSAvoidnon-torsional forces

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The support structure is divided into multiple functional portions: a shaft engagement portion for rotational coupling, a damping member engagement portion for supporting the torsional damper, and an intermediate portion that transmits non-torsional forces. This segmentation allows each portion to handle specific force types independently, protecting the torsional damper from non-torsional loads while maintaining its torsional damping function.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The intermediate portion acts as a mediator between the shaft and the torsional damping member. It provides a dedicated force transmission path for non-torsional forces (axial and radial), preventing these forces from being transmitted directly to the torsional damping member and thereby protecting it from premature wear and damage.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Device complexity

If non-torsional forces are transmitted through the torsional damping member, then structural simplicity is maintained, but premature wear and damage occur

Engineering Contradiction:

Improvesupport structureVSAvoidcomponent lifespan

Core Design Contradiction:

Device complexityVSReliability

Solution Approach 1:

The support structure is divided into multiple functional portions: a shaft engagement portion for rotational coupling, a damping member engagement portion for supporting the torsional damper, and an intermediate portion that transmits non-torsional forces. This segmentation allows each portion to handle specific force types independently, protecting the torsional damper from non-torsional loads while maintaining its torsional damping function.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The intermediate portion acts as a mediator between the shaft and the torsional damping member. It provides a dedicated force transmission path for non-torsional forces (axial and radial), preventing these forces from being transmitted directly to the torsional damping member and thereby protecting it from premature wear and damage.

Inventive Principle:

Principle #24Intermediary (Mediator)

Data Source

PatentUS10823231B2Damping member support and powertrain assembly for a work vehicle

Publication Date: 2020.11.03 DEERE & CO

AI summary

A damping member support for non-torsional force bypass around a torsional damping member includes a damping member engagement portion configured to be coupled to the torsional damping member and an intermediate portion configured to transmit a non-torsional force between a shaft and the torsional damping member.