Rotor Damper Stopper Geometry to Prevent Collision Damage
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Solution Overview
Problem
Existing damper devices require carburizing to prevent damage to the stopper mechanism, which is costly and undesirable.
Innovation Solution
The damper device design includes contact surfaces and stopper surfaces extending in the radial direction, increasing the contact area and reducing the load per unit area, thereby preventing damage without the need for carburizing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If carburizing is performed on the side plate and hub plate to prevent damage from collision between stopper protrusions and stopper lock tabs, then the strength and durability of the stopper mechanism is improved, but the manufacturing cost increases
Solution Approach 1:
The invention changes the orientation of the contact surface from extending in the axial direction to extending in the radial direction. This dimensional change increases the contact area between the stopper mechanism components, thereby reducing the load per unit area and preventing damage without requiring carburizing treatment, thus resolving the contradiction between strength and manufacturing cost
Solution Approach 2:
The invention changes the geometric parameter of the contact surface orientation from axial extension to radial extension. This parameter change increases the contact area and reduces stress concentration, allowing the stopper mechanism to function without carburizing treatment, thereby resolving the contradiction between strength requirements and manufacturing cost
2Device complexity
If the contact surface and stopper surface extend in different directions, then the stopper mechanism structure is simpler, but the contact area is smaller causing higher load per unit area and potential damage
Solution Approach 1:
The invention reorients the contact surface to extend in the radial direction while maintaining the stopper surface orientation, creating a larger contact area between the surfaces. This dimensional reorientation increases the contact area without adding structural complexity, thereby resolving the contradiction between device complexity and strength
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 configuration effectively inhibits damage to the stopper mechanism while eliminating the need for carburizing, reducing costs and maintaining functionality.
Implementation Method 1
a plurality of coil springs elastically coupling the first and second rotors
Implementation Method 2
another type of damper device has been also proposed that a hysteresis torque is generated by one or more friction materials
Data Source
AI summary
A damper device includes a first rotor, a second rotor, and an elastic member. The first rotor includes a contact surface. The contact surface faces a circumferential direction and extends in a radial direction. The second rotor is disposed to be rotatable relative to the first rotor. The second rotor includes a stopper surface extending in the radial direction. The stopper surface is opposed to the contact surface at an interval in the circumferential direction. The elastic member elastically couples the first rotor and the second rotor.