Brake Actuating Device Projection Axial Force Distribution
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Solution Overview
Problem
Existing brake actuating devices in vehicle brake systems face challenges in effectively distributing and absorbing axial forces, frictional forces, and hydraulic pressures, leading to instability and potential sealing issues during operation and assembly.
Innovation Solution
The introduction of a projection within the housing opening that extends axially and supports the guide element, allowing for distributed force absorption by the housing, combined with a guide element design that reduces diameter and length, and a sealing region to manage axial forces and maintain a reliable seal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional guide element design is used without a projection, then the guide element can be simply installed, but axial forces are concentrated on the guide element causing instability and potential sealing issues
Solution Approach 1:
The housing opening is segmented into a guide region and a projection, where the projection extends axially from the wall into the housing opening. This segmentation allows the projection to bear axial forces separately from the guide element, preventing force concentration on the guide element and improving overall reliability.
Solution Approach 2:
The projection acts as an intermediary component between the wall and the guide element. It transfers axial forces from the guide element to the housing structure, distributing the loads and preventing direct stress concentration on the guide element, thereby enhancing stability and sealing reliability.
2Strength
If a larger diameter and longer guide element is used to absorb axial forces, then force absorption improves, but the device weight and material requirements increase
Solution Approach 1:
The force absorption function is segmented between the projection and the guide element. The projection handles axial forces while the guide element focuses on guiding the piston, allowing the guide element to be smaller in diameter and length, thus reducing weight and material usage.
Solution Approach 2:
Instead of making the guide element larger to absorb axial forces, the design inverts the approach by adding a projection that absorbs these forces. This allows the guide element to remain compact while still providing adequate force absorption capability through the projection.
3Reliability
If the guide region is enlarged to accommodate force distribution, then force distribution improves, but the housing interior space is reduced
Solution Approach 1:
The projection extends in the axial dimension rather than requiring radial expansion of the guide region. This dimensional approach allows force distribution to occur along the axial direction, preserving the radial interior space of the housing while still achieving effective force distribution.
Solution Approach 2:
The projection is positioned locally within the guide region, concentrating the force distribution function in a specific axial location rather than requiring the entire guide region to be enlarged. This local implementation maintains overall housing interior space while providing effective force distribution where needed.
Data Source
AI summary
A brake actuating device of a vehicle brake system has a pump housing which has a housing opening surrounded by a wall. The housing opening includes a housing axis along which a piston is to be accommodated in the housing opening in an axially displaceable manner. The housing opening further has a guide region in which a guide element to be arranged between the wall and the piston is to be accommodated. The brake actuating device further has a projection projecting from the wall into the housing opening. The projection is provided axially next to the guide region in the housing opening. The guide element is placed axially on the projection.