Rotor Damper Structure Using Arc Spring and Rubber Member
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Solution Overview
Problem
Existing power transmitting devices with damper mechanisms using coil springs and rubber members are complex, large, and costly, with coil springs failing to deform elastically to a large extent under low torque loads, limiting their effectiveness in shock absorption.
Innovation Solution
A power transmitting device featuring a single arc spring with low modulus of elasticity and a rubber member with high modulus of elasticity, arranged coaxially between two rotors, where the arc spring absorbs shocks under low torque and the rubber member absorbs shocks under high torque, allowing for a simple and compact shock-absorbing mechanism.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If multiple short coil springs are arranged in series along circumferential directions, then a large stroke can be maintained, but the damper mechanism becomes complex in structure, large in size, and high in cost
Solution Approach 1:
The arc spring is divided into multiple arc-shaped segments arranged in series along the circumferential direction. Each segment contributes to the overall elastic deformation, enabling large stroke absorption without requiring multiple separate components. This segmentation maintains simplicity while achieving the desired stroke length.
Solution Approach 2:
The invention uses an arc-shaped spring instead of straight coil springs. The curved geometry allows the spring to achieve large elastic deformation in a compact circumferential space, providing large stroke absorption without increasing the overall size or complexity of the mechanism.
2Force
If coil springs are used to bear torque loads, then they can absorb shocks under low torque load, but they fail to be elastically deformed to a large extent and make it difficult to maintain a relatively large stroke
Solution Approach 1:
The arc-shaped geometry of the spring enables it to undergo large elastic deformation when subjected to torque loads. The curved structure naturally accommodates rotational displacement, allowing the spring to be elastically deformed to a large extent and maintain a relatively large stroke while effectively bearing torque loads.
Solution Approach 2:
The invention changes the geometric parameters of the spring from a straight coil configuration to an arc-shaped configuration. This parameter change enables the spring to achieve both large elastic deformation capability and effective torque load bearing, resolving the contradiction between force absorption and stroke maintenance.
3Device complexity
If a single arc spring is used instead of multiple coil springs, then the structure becomes simple and compact, but it must effectively handle both low and high torque load conditions
Solution Approach 1:
The arc spring is segmented into multiple arc-shaped sections arranged in series. This segmentation allows the single spring to achieve both simplicity in structure and adaptability to handle a wide range of torque loads, as each segment can deform independently to accommodate varying load conditions.
Solution Approach 2:
The single arc spring is designed to perform multiple functions: it absorbs shocks under low torque loads and continues to provide damping under high torque loads. The arc-shaped geometry and segmented structure enable this universal functionality, eliminating the need for separate mechanisms for different load conditions.
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 device effectively absorbs shocks across a wide range of torque loads, maintaining a simple structure and reducing the number of parts, ensuring smooth power transmission while minimizing noise and operational losses.
Implementation Method 1
an arc spring that is elastically deformable to a large extent and has a small modulus of elasticity, the arc spring being interposed between the first rotor and the second rotor
Implementation Method 2
a rubber member that is elastically deformable to a small extent and has a large modulus of elasticity, the rubber member being interposed between the first pressing protrusion and the second pressing protrusion
Data Source
AI summary
A power transmitting device includes a first rotor and a second rotor rotatably disposed coaxially with a rotational central axis and in facing relation to each other, a single arc spring that is elastically deformable to a large extent and has a small modulus of elasticity, the arc spring being interposed between the first rotor and the second rotor for urging the first rotor and the second rotor to opposite sides in a ration direction, a first pressing protrusion projecting from the first rotor and a second pressing protrusion projecting from the second rotor, the first pressing protrusion and the second pressing protrusion being disposed in relative positions on superposed rotation trajectories, and a rubber member that is elastically deformable to a small extent and has a large modulus of elasticity, the rubber member being interposed between the first pressing protrusion and the second pressing protrusion with gaps therebetween.