Flywheel Torque Limiter Assembly for Compact High-Torque Transmission
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Solution Overview
Problem
Existing torque limiters accommodated in flywheels face interference issues during assembly due to increased radial dimensions, which compromise compactness and torque capacity, as they require openings that expose internal members, leading to potential interference with the flywheel.
Innovation Solution
A torque limiter design featuring a first plate, second plate, friction disc, pressing member, and third plate, where the third plate has knock pin through holes and a tubular portion with openings, allowing knock pins to be inserted before the pressing member, preventing interference and maintaining compactness while achieving the required torque capacity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the torque limiter is enlarged to increase torque capacity, then the torque capacity is improved, but the radial dimension of the flywheel increases
Solution Approach 1:
The invention transitions from radial expansion to axial expansion by stacking multiple friction discs and pressing members in the axial direction. This allows the torque limiter to achieve higher torque capacity through increased axial length rather than radial size, thereby maintaining a compact radial dimension while improving torque capacity.
2Length of stationary object
If openings are formed in the torque limiter members to achieve compactness, then the radial dimension is reduced, but internal members are exposed and may interfere with the flywheel during assembly
Solution Approach 1:
The knock pins are installed in the flywheel before the torque limiter components are assembled. This preliminary action ensures that the knock pins are already in place to guide and position the friction discs and pressing members correctly, preventing any potential interference or misalignment during the assembly process while maintaining the compact design with openings.
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 design enables reliable torque transmission with the flywheel while preventing interference, ensuring the torque limiter has a sufficient torque capacity without increasing the radial dimension of the flywheel, thus maintaining compactness and preventing assembly issues.
Implementation Method 1
the friction disc slips while being interposed and held between the first plate and the second plate. Accordingly, the excessive torque is prevented from being transmitted to the output side
Data Source
AI summary
A torque limiter, fixed to a flywheel including an annular portion to which knock pins each including a trunk portion are fixed, is disclosed. The torque limiter includes a first plate, a second plate axially opposed to the first plate, a friction disc disposed between the first and second plates, a pressing member, and a third plate. The pressing member presses the second plate onto the friction disc. The third plate holds the pressing member together with the second plate therebetween. The third plate includes knock pin through holes such that the knock pin are fitted therein. The third plate is attached at an attachment surface thereof to the flywheel. A length between a surface of the pressing member, facing an interior of an accommodation portion of the flywheel, and the attachment surface of the third plate is shorter than a length of the trunk portion of each knock pin.