Torque Limiter Friction Plate Layout for Uniform Load Application
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Solution Overview
Problem
In existing torque limiters, the support plate and disc spring, when manufactured from a common sheet using nested-based manufacturing, do not overlap axially, resulting in non-uniform application of load to the friction material.
Innovation Solution
The torque limiter configuration includes a support plate, auxiliary plates, a disc spring, and friction materials, where the auxiliary plates are attached to the support plate, allowing the friction material to be sandwiched by the disc spring and auxiliary plates, ensuring uniform load application.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the support plate and disc spring are manufactured from a common sheet using nested-based manufacturing, then manufacturing cost is reduced, but the friction material cannot be uniformly applied with a load
Solution Approach 1:
The patent divides the originally single support plate structure into multiple segments: the support plate itself and multiple auxiliary plates attached to it. This segmentation allows the auxiliary plates to be positioned at specific locations (radially outside the support plate) to create proper overlap with the disc spring, enabling uniform load application to the friction material while maintaining cost-effective nested-based manufacturing of the support plate and disc spring from a common sheet
Solution Approach 2:
The auxiliary plates serve as intermediary elements between the support plate and the disc spring. By attaching these auxiliary plates to the support plate, the system creates the necessary geometric relationship for overlap with the disc spring, which acts as the load-transmitting intermediary that ensures uniform pressure distribution to the friction material
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 uniform application of load to the friction material, enhancing the torque limiter's effectiveness in preventing excessive torque transmission.
Implementation Method 1
The disc spring is disposed between the support plate and the first side plate in the axial direction. The first friction material is disposed between the support plate and the disc spring in the axial direction. The plurality of auxiliary plates are attached to the support plate; hence, the first friction material can be sandwiched by the disc spring and the plurality of auxiliary plates.
Data Source
AI summary
A power transmission device has an annular side plate and an annular support plate spaced apart from it. Multiple auxiliary plates are attached to the support plate. The auxiliary plates are disposed radially outside the support plate and are aligned in an annular shape. A disc spring is disposed between the support plate and the side plate. A first friction material is disposed between the support plate and the disc spring. The first friction material is disposed adjacent to the support plate and the multiple auxiliary plates. An inner peripheral edge of the disc spring is disposed radially outside an outer peripheral edge of the support plate, while being disposed radially inside an outer peripheral edge of each of the plurality of auxiliary plates.