Torque Limiter Damper Radial Compactness
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Solution Overview
Problem
Existing torque limiter embedded damper devices in hybrid vehicles face a challenge in maintaining compactness due to an inevitable increase in radial dimension, which hinders their size efficiency.
Innovation Solution
The damper device incorporates a torque limiter unit coupled radially inside the damper unit's coupling portions, featuring a friction disc with a third coupling portion that overlaps with window portions, allowing for a self-contained torque limiter assembly that can be easily integrated and adjusted, thereby reducing the overall radial dimension.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the torque limiter is disposed on the outer peripheral side of the damper part, then the torque limiter function is achieved, but the radial dimension of the device increases
Solution Approach 1:
The friction disc of the torque limiter is disposed radially inside the first and second plates of the damper unit, nesting the torque limiter within the existing radial space of the damper unit rather than adding to the outer periphery. This allows the torque limiter function to be achieved without increasing the overall radial dimension of the device
Solution Approach 2:
Instead of placing the torque limiter in the radial direction (outer peripheral side), the invention repositions it to the axial direction by coupling the friction disc radially inside the plates. This dimensional repositioning resolves the conflict between achieving torque limiting function and maintaining compact radial size
2Length of moving object
If the torque limiter unit is coupled radially inside the coupling portions, then compactness is improved, but assembly complexity increases
Solution Approach 1:
The torque limiter unit is designed as a separate, self-contained assembly with its own coupling portions that can be independently manufactured and then integrated with the damper unit. This segmentation allows for easier manufacturing of individual components while achieving compact integration when assembled
Solution Approach 2:
The friction disc is designed with a third coupling portion that enables it to be coupled to the damper unit in a radially inner position, making the same component serve both the torque limiting function and the compact integration requirement. This multi-functional design simplifies the overall assembly process
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 enables a compact damper device with a torque limiter function by minimizing radial growth, facilitating easier assembly and adaptation to various specifications, while effectively preventing excessive torque transmission from the output side to the engine side during engine start.
Implementation Method 1
The torque limiter unit includes a friction disc that includes a third coupling portion in an inner peripheral part thereof
Data Source
AI summary
A torque limiter embedded damper device is provided between a power source-side member and an output-side member. The torque limiter embedded damper device includes a damper unit coupled to the output-side member, and a torque limiter unit that limits torque transmitted between the power source-side member and the damper unit. The damper unit includes first and second plates opposed to each other. The first and second plates have a disc shape. The first plate includes a first coupling portion in an outer peripheral end thereof. The second plate includes a second coupling portion in an outer peripheral end thereof. The first and second coupling portions are coupled to each other. The torque limiter unit includes a friction disc including a third coupling portion in an inner peripheral part thereof. The third coupling portion is coupled to the damper unit and disposed radially inside the first and second coupling portions.