Rotor Plate Assembly for Compact High-Torque Dampers
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Solution Overview
Problem
Existing damper devices face challenges in reducing axial dimensions while maintaining rotational strength due to the requirement of thick plates to withstand torque transmission.
Innovation Solution
A damper device design featuring a first and second disc-shaped rotor with bent portions and holding portions to securely hold elastic members, allowing for reduced plate thickness and enhanced rotational strength, along with a third rotor that acts as a stopper mechanism to control torsion angles and further enhance strength.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the plate thickness is increased to enhance rotational strength, then the strength against rotation is improved, but the axial dimension of the damper device increases
Solution Approach 1:
The invention transitions from a single thick plate structure to a multi-layered plate assembly where multiple thinner plates are stacked axially. The bent portions extend in the radial direction and are fixed between the first and second plates, creating a three-dimensional reinforcement structure that distributes the rotational load across multiple layers rather than relying on a single thick plate, thus reducing the axial dimension while maintaining strength.
Solution Approach 2:
The rotor is constructed as a composite structure combining multiple plate elements and bent portions into a unified assembly. The first and second plates work together with the bent portions fixed between them, creating a composite rotor structure where the combined strength of multiple thinner components equals or exceeds that of a single thick plate, thereby reducing axial dimension while preserving rotational strength.
2Length of moving object
If the plate thickness is reduced to decrease axial dimension, then the axial dimension is reduced, but the strength against rotation deteriorates
Solution Approach 1:
The rotor is segmented into multiple functional components: the first plate, the second plate, and the bent portions that extend between them. Each component is optimized for its specific function, and their combined arrangement creates a reinforcement structure where the bent portions act as structural connectors that distribute and bear rotational loads, compensating for the reduced thickness of individual plates while maintaining overall rotational strength.
Solution Approach 2:
The bent portions extend radially between the first and second plates, creating a three-dimensional reinforcement structure. This radial extension adds strength in the rotational direction without requiring increased axial thickness, as the bent portions leverage the radial dimension to provide structural support and distribute loads across the plate assembly.
3Device complexity
If a simple plate configuration is used, then the device complexity is reduced, but the rotational strength is insufficient
Solution Approach 1:
The invention merges multiple simple components—the first plate, the second plate, and the bent portions—into a unified rotor assembly. Each component individually has a simple structure, but their combination creates a reinforced configuration where the bent portions fixed between the plates form an integrated strength-enhancing structure, achieving high rotational strength through the synergistic arrangement of simple elements rather than through complex individual components.
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 effectively reduces the axial dimension of the damper device while maintaining or improving rotational strength, allowing for more compact and efficient power transmission systems.
Implementation Method 1
a plurality of elastic members elastically coupling the first rotor and the second rotor in a circumferential direction
Data Source
AI summary
A damper device includes a first rotor disposed to be rotatable, a second rotor rotatable relative to the first rotor, and a plurality of elastic members configured to elastically couple the first rotor and the second rotor in a circumferential direction. The first rotor includes a first plate and a second plate. The first and second plates are axially opposed to each other, and fixed to be immovable in both axial and circumferential directions. The first plate includes a plurality of first holding portions and a plurality of bent portions. The plurality of first holding portions hold the plurality of elastic members. The plurality of bent portions are provided on an outer peripheral end of the first plate, and bent toward the second plate. The second plate includes a plurality of second holding portions holding the plurality of elastic members together with the plurality of first holding portions.