Damper Device Resilient Spring Seat Design
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Solution Overview
Problem
Conventional damper devices with resin spring seats face issues of excessive deformation and potential damage due to the rigidity mismatch between the coil spring and the overhang portion, leading to durability concerns when using low elastic modulus coil springs.
Innovation Solution
A damper device with a resin spring seat featuring a metallic core member, where the overhang portion has a low-rigidity portion near the seat and a high-rigidity portion further away, allowing controlled deformation and enhanced durability by distributing pressure effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the overhang portion is made high rigidity to suppress deformation, then the coil spring deformation is restricted, but the coil spring experiences excessive deformation between restricted and unrestricted areas
Solution Approach 1:
The overhang portion metallic core member is divided into a low-rigidity portion near the seat portion and a high-rigidity portion at the distal end. This local differentiation allows the near portion to flex with the coil spring while the distal portion maintains structural stability, preventing both excessive deformation and damage.
2Strength
If the overhang portion is made low rigidity to allow deformation, then the coil spring can deform freely, but the overhang portion may be damaged by input from the coil spring
Solution Approach 1:
The overhang portion metallic core member is divided into a low-rigidity portion near the seat portion and a high-rigidity portion at the distal end. This local differentiation allows the near portion to flex with the coil spring while the distal portion maintains structural stability, preventing both excessive deformation and damage.
3Stability of the object's composition
If a metal core with high strength is used in the spring seat, then the overhang portion can suppress deformation, but it cannot follow the deformation of low elastic modulus coil springs
Solution Approach 1:
The overhang portion metallic core member is divided into a low-rigidity portion near the seat portion and a high-rigidity portion at the distal end. This local differentiation allows the near portion to flex with the coil spring while the distal portion maintains structural stability, preventing both excessive deformation and damage.
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 solution prevents excessive deformation and damage by allowing the overhang portion to deform with the coil spring while maintaining structural integrity, thereby improving the durability of both the overhang portion and the coil spring.
Implementation Method 1
a spring seat that supports a coil spring which absorbs torsional vibration
Implementation Method 2
The overhang portion is configured to suppress a deformation of the coil spring in the outer diameter direction caused by centrifugal force, when centrifugal force is applied to the coil spring accompanying a rotation of the damper device
Data Source
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AI summary
To provide a damper device capable of achieving an improvement in the durability of the overhang portion and the coil spring, while allowing the overhang portion of the spring seat to deform, following the coil spring. The damper device comprises a first coil spring (31) and a second coil spring (32) which are interposed in the circumferential direction between a hub plate-side support arm (11) of a hub plate (1) and an intermediate plate-side support arm (24) of an input-output plate (2), and a first spring seat (41) and a second spring seat (42) made of resin having a metallic core member (45) inside, which supports the two ends of the coil springs (31), (32), wherein the two spring seats (41), (42) comprises a seat portion (43) and an overhang portion (44), and the overhang portion metallic core member (452) of the metallic core member (45) comprises a low-rigidity portion (452) that is provided on a side close to the seat portion (43) with a relatively lower rigidity, and a high-rigidity portion (452b) that is provided on a side far from the seat portion (43) with a relatively higher rigidity.