Dual-Mode Damper Rotor for One-Way and Two-Way Damping

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Solution Overview

Problem

Existing dampers require replacement of the one-way clutch to function effectively in both rotation directions, limiting their versatility and increasing the number of components needed.

Innovation Solution

A damper design featuring a rotor with dual fitting portions, where the one-way clutch is integrated into the first fitting portion to function as a one-way damper and the second fitting portion supports the rotation shaft as a two-way damper, allowing the same rotor to serve different functionalities and reducing the number of components.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If the one-way clutch is used to support the rotation shaft, then the damper can function as a one-way damper, but the versatility is reduced and requires replacement of the one-way clutch to function as a two-way damper

Engineering Contradiction:
Improveversatility of damperVSAvoidnumber of components
Core Design Contradiction:
Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The rotor is designed with dual functionality: it can serve as the outer race of the one-way clutch when the first joining portion is connected, and as a radial bearing when the second joining portion is connected. This allows the same rotor to support the rotation shaft in both one-way and two-way damping modes, eliminating the need to replace the one-way clutch and improving versatility while reducing component complexity

Inventive Principle:
Principle #6Universality (Multi-functionality)

2Adaptability or versatility

If the inner circumferential surface of the outer race serves as the radial bearing, then the structure is simplified, but the damper can only dampen torque in one direction

Engineering Contradiction:
Improvedamping direction capabilityVSAvoidstructural complexity
Core Design Contradiction:
Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The rotor is segmented into two distinct joining portions: the first joining portion for one-way clutch integration and the second joining portion for direct rotation shaft support. This segmentation allows the rotor to be configured for different damping modes by connecting different portions, enabling both one-way and two-way damping capabilities within a single unified structure

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The rotor's functionality is made dynamic and adjustable: depending on which joining portion is connected to the rotation shaft, the system can switch between one-way clutch-supported mode and radial bearing-supported mode. This dynamic reconfigurability allows the damper to adapt its damping characteristics based on operational requirements without changing the physical structure

Inventive Principle:
Principle #15Dynamics

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 enhances the versatility of the damper by allowing it to function as both a one-way and two-way damper with a single rotor, reducing the number of components and improving damping force through frictional interaction with the damping medium.

Implementation Method 1

a damping medium accommodated between the one-way clutch and the housing

Methodology Applied
Scientific EffectFriction: Friction

Data Source

PatentUS11415194B2Damper
Publication Date: 2022.08.16 NIFCO INC
  • US11415194B2 patent drawing
  • US11415194B2 patent drawing
  • US11415194B2 patent drawing

AI summary

This damper comprises: a housing accommodating a damping medium; and a rotor rotatable relative to the housing, inside the housing. A unidirectional clutch which stipulates rotation in one direction and a rotating shaft can be connected to each other coaxially. The unidirectional clutch, when supporting the rotating shaft, constitutes a first input object, whereas the rotating shaft constitutes a second input object when not being supported by the unidirectional clutch. A connection object comprises a first connection part capable of connecting to the first input object coaxially, and a second connection part capable of connecting to the second input object coaxially. Two separate connection states are provided, namely a state in which the first connection part and the first input object are connected to each other, and a state in which the second connection part and the second input object are connected to each other.