Brake Actuation Shaft Non-Parallel Axis Design
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Solution Overview
Problem
Existing drum brakes face space limitations due to bulky components like air actuators and levers, limiting design flexibility in commercial vehicles where component placement is constrained.
Innovation Solution
The brake design features an actuation shaft with a non-parallel axis of rotation to the wheel axis, allowing for alternative positioning of the actuation device, including the lever and air chamber, enabling more flexible placement and reducing spatial constraints.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the shaft axis is kept parallel to the wheel axis (conventional design), then the brake structure is simple and easy to manufacture, but the space for component placement is limited and design flexibility is reduced
Solution Approach 1:
The invention changes the orientation of the shaft axis from being parallel to the wheel axis (conventional single-dimension approach) to being at an angle thereto (introducing a new dimensional orientation). This angular orientation allows the inboard end of the actuation shaft to be positioned at different radial and circumferential locations relative to the actuation device, thereby providing greater design flexibility and adaptability in component placement without significantly increasing overall system complexity
2Reliability
If bulky components like air actuators and levers are used, then reliable actuation is achieved, but more space is required for component placement
Solution Approach 1:
By orienting the shaft axis at an angle to the wheel axis rather than parallel to it, the invention redistributes the spatial requirements of the actuation system in different radial and circumferential directions. This angular orientation allows bulky components like air actuators and levers to be positioned in previously unavailable spaces, effectively utilizing three-dimensional space more efficiently while maintaining actuation reliability
Solution Approach 2:
The invention separates the actuation system into distinct functional components (actuation device, actuation shaft, lever, air chamber) that can be independently positioned and optimized. The angular shaft orientation allows these segmented components to be distributed across different spatial locations, reducing the concentrated space requirement while maintaining overall system reliability
Data Source
AI summary
A brake includes a brake shoe moveable between an engaged position and a disengaged position and defining an axis of rotation of an associated brake drum. The brake includes an actuation shaft rotatable about a shaft axis and an actuation device for transferring rotational movement of the actuation shaft into movement of the brake shoe from the disengaged position to the engaged position. The axis of rotation is non-parallel to the shaft axis.