Flywheel Damper Positioning Structure for Radial Alignment
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Solution Overview
Problem
Existing damper devices in hybrid vehicles experience radial displacement of the damper unit with respect to the torque limiter unit due to uneven pressing force from cone springs, leading to misalignment and potential mechanical issues.
Innovation Solution
A damper device with a positioning structure that includes a cover plate and friction disc configuration, where the outer peripheral end of the damper unit is set in place radially with respect to the torque limiter unit through contact between the friction disc and the cover plate, using a core plate with controlled outer diameter to minimize displacement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the flywheel is fixed to the engine-side member through a flexible plate, then the damper device can accommodate engine vibrations, but the cone spring unevenly applies pressing force to the friction disc causing radial displacement of the damper unit
Solution Approach 1:
A positioning structure is introduced as an intermediary element between the damper unit and torque limiter unit. This positioning structure includes a positioning protrusion on the damper unit that fits into a positioning groove on the torque limiter unit, acting as a mediator to maintain proper radial alignment and prevent displacement caused by uneven pressing forces from the cone spring
Solution Approach 2:
The solution addresses the radial displacement problem by introducing constraints in the radial dimension through the positioning structure. The positioning protrusion and groove create a mechanical interlock that restricts radial movement, effectively adding a dimensional constraint to prevent the displacement issue
2Volume of moving object
If the outer peripheral end of the damper unit is disposed on the second side of the inner peripheral end of the cover plate in the axial direction, then the damper unit can be compactly arranged, but radial displacement occurs without proper positioning
Solution Approach 1:
The positioning structure serves as an intermediary mechanism that enables the compact axial arrangement while simultaneously ensuring radial alignment. The positioning protrusion and groove create a mechanical reference that maintains proper radial positioning even when the outer peripheral end is disposed on the second side in the axial direction
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 effectively inhibits radial displacement of the damper unit, ensuring precise alignment and reducing mechanical power transmission errors by maintaining consistent contact between the damper and torque limiter units.
Implementation Method 1
a friction disc (13) that is disposed on the second side of the friction portion of the cover plate in the axial direction and is pressed against the friction portion
Data Source
AI summary
A damper device includes a torque limiter unit, a damper unit, and a positioning structure. The torque limiter unit includes a damper cover fixed to a surface of a flywheel on a first side of the flywheel in an axial direction. The damper unit is disposed such that an outer peripheral end thereof is located on a second side of an inner peripheral end of the damper cover in the axial direction. The damper unit transmits mechanical power together with the flywheel therebetween. The positioning structure radially sets the damper unit in place with respect to the torque limiter unit by making an outer peripheral surface of a core plate of a friction disc contactable with an inner surface of the damper cover of the torque limiter unit. The damper device is intended to inhibit displacement in radial position of a damper unit with respect to a torque limiter unit.