Compact Damper Structure With Directional Hysteresis Torque
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional damper devices have a long axial length due to multiple components, making them difficult to mount in vehicles, and struggle to generate wide variations of hysteresis torque effectively.
Innovation Solution
A damper device design featuring a single control plate with radially and axially extending portions, integrated sliding portions, and an elastic mechanical unit, which reduces the number of components and allows for adjustable hysteresis torque generation by varying the sliding torque based on rotational direction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple control plates are used to generate sliding torque, then hysteresis torque generation is improved, but the axial length and device complexity increase
Solution Approach 1:
The patent merges multiple control plates into a single integrated control plate that includes multiple sliding portions (first sliding portion and second sliding portion). This single control plate performs the function of multiple separate control plates by having multiple sliding surfaces that can generate sliding torque simultaneously, thereby reducing the axial length while maintaining hysteresis torque generation capability
Solution Approach 2:
The control plate is segmented into multiple functional regions with different sliding portions, each having different friction coefficients. The first sliding portion has a first friction coefficient while the second sliding portion has a second friction coefficient different from the first, allowing independent optimization of sliding torque characteristics in different regions of the same control plate
2Adaptability or versatility
If multiple control plates with different friction coefficients are used, then wide variations of hysteresis torque are achieved, but the number of components and device complexity increase
Solution Approach 1:
Multiple control plates with different friction coefficients are merged into a single control plate structure that includes multiple sliding portions. Each sliding portion has a different friction coefficient, allowing the system to achieve wide variations in hysteresis torque while using only one control plate component
Solution Approach 2:
Different regions of the control plate are given different local properties through the use of sliding portions with different friction coefficients. This allows the control plate to have heterogeneous friction characteristics in different areas, enabling wide hysteresis torque variation without requiring multiple separate components
3Length of stationary object
If a single control plate is used, then the axial length is reduced, but the ability to generate wide variations of hysteresis torque is limited
Solution Approach 1:
The single control plate is segmented into multiple sliding portions with different friction coefficients. This segmentation allows different regions of the control plate to contribute differently to hysteresis torque generation, enabling wide torque variations while maintaining a compact single-plate structure
Solution Approach 2:
The control plate is designed to dynamically engage different sliding portions based on rotational direction. The first sliding portion generates sliding torque in one rotational direction while the second sliding portion generates sliding torque in the opposite direction, providing adaptive hysteresis torque characteristics
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 design achieves a shorter axial length and stable generation of various hysteresis torque levels, suitable for absorbing vibrations and noise in vehicles, particularly hybrid vehicles, by optimizing the sliding and elastic components.
Implementation Method 1
an elastic mechanical unit that elastically connects the first rotating body and the second rotating body in a rotation direction
Implementation Method 2
a first sliding portion that is disposed between the first rotating body and the control plate, slides with respect to at least one of the first rotating body or the control plate to generate a first sliding torque
Implementation Method 3
a second sliding portion that is disposed between the second rotating body and the control plate, and slides with respect to at least one of the second rotating body or the control plate to generate a second sliding torque
Data Source
AI summary
A damper device includes: a first rotating body that rotates about a rotation axis; a second rotating body that rotates relative to first rotating body; an elastic mechanical unit; a control plate that includes radially extending portion in contact with elastic mechanical unit and a axially extending portion that is at least partially accommodated in one of the first or second rotating body, and is disposed only in one of a first accommodation space or a second accommodation space in axial direction; a first sliding portion that generates a first sliding torque, has a first opening, and is rotatably supported by outer peripheral surface of second rotating body on inner peripheral surface that includes first opening and surrounds first opening; and second sliding portion that generates second sliding torque. In a case where first and rotating body rotate relative to each other, the and second first sliding torque are generated.