Damper Mechanism Linking Components Varying Pitches
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Solution Overview
Problem
Conventional damper mechanisms for power transmission systems face limitations in achieving varied torsional characteristics due to structural constraints, particularly with the use of stop pins, which restrict the utilization of high-stiffness coil springs and limit design flexibility.
Innovation Solution
A damper mechanism with linking components of varying pitches allows for the placement of elastic members of different sizes, enabling greater variation in torsional characteristics while maintaining a minimal structure change, by using protrusions and cut-outs on the hub flange and input plates to absorb and damp torsional vibrations without a stop pin.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a stop pin is used to restrict relative rotation between the hub flange and input plates, then the stopper mechanism can be realized, but the stop pin must be disposed more to the inside in the radial direction which prevents adequate relative torsional angle even when coil springs with high stiffness are used
Solution Approach 1:
The invention extracts the stopper function from the traditional stop pin and relocates it to the outer peripheral edges of the input plates. The stopper mechanism is achieved through stopper protrusions on the hub flange contacting with stopper surfaces on the input plates, eliminating the need for a central stop pin and enabling adequate relative torsional angle.
Solution Approach 2:
The invention changes the dimensional arrangement of the stopper mechanism from a radial-central position (stop pin) to an outer peripheral position (stopper protrusions and surfaces). This dimensional relocation allows the stopper mechanism to function while permitting sufficient relative torsional angle between the hub flange and input plates.
2Device complexity
If linking components are disposed at the same pitch in the rotational direction, then the structure is simple, but it is extremely difficult to make some coil springs larger, limiting design flexibility and variation in torsional characteristics
Solution Approach 1:
The invention introduces asymmetric arrangement of linking components by allowing different pitches in the rotational direction. This asymmetric configuration enables different coil springs to have different sizes and stiffness values, providing design flexibility for varying torsional characteristics while maintaining structural simplicity.
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 design allows for enhanced flexibility in torsional characteristics and increased design latitude, enabling the use of larger elastic members and maintaining the same or greater operating angles with reduced structural modifications.
Implementation Method 1
coil springs that elastically link the pair of input plates and the hub flange in the rotational direction
Data Source
AI summary
A damper mechanism 4 has a clutch plate 21 and a retaining plate 22 disposed aligned in the axial direction, a hub flange 6 disposed relatively rotatably in the axial direction between the plates 21 and 22, and a second coil spring 8 for elastically linking the plates 21 and 22 to the hub flange 6 in the rotational direction. The plates 21 and 22 have a pair of first main body components 28, and a plurality of linking components 31 that are disposed in the rotational direction between first protrusions 49 and second protrusions 57 and that link the pair of first main body components 28. The plurality of linking components 31 is disposed such that adjacent pitches are different.