Brake Reservoir Support Structure for Short Master Cylinders
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Solution Overview
Problem
Conventional master cylinders reduced in length in the vehicle front-rear direction cause reservoir tanks to extend forward, making it difficult to support them against downward loads, leading to potential deformation during collisions.
Innovation Solution
A vehicle brake arrangement featuring a master cylinder attached to a dash panel, a reservoir tank mounted above it, and a guide member with a fixed portion and an extending portion that overlaps with the reservoir tank's overextending portion, providing support and distributing loads to prevent deformation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If the master cylinder is reduced in length in the vehicle front-rear direction, then the overall vehicle space is optimized, but the reservoir tank cannot be properly supported against downward loads
Solution Approach 1:
The guide member extends in the vehicle width direction (lateral dimension) rather than only in the front-rear direction. By positioning the guide member laterally outward from the master cylinder and allowing it to overlap with the reservoir tank in the vehicle up-down direction, the support function is achieved through a dimensional shift, enabling compact front-rear length while maintaining support capability.
Solution Approach 2:
The guide member acts as an intermediary component between the master cylinder and the reservoir tank. It is fixed to the master cylinder and provides indirect support to the reservoir tank's overextending portion, mediating the load transfer without requiring direct attachment between the master cylinder and the extended tank portion.
2Ease of operation
If the reservoir tank extends forward beyond the master cylinder, then vacuuming access is improved, but the reservoir tank becomes vulnerable to deformation during collisions
Solution Approach 1:
The guide member is pre-positioned to overlap with the overextending portion of the reservoir tank in the vehicle up-down direction. This preliminary positioning creates a protective structure that prevents deformation during collisions by providing lateral guidance and support before collision forces are applied.
Solution Approach 2:
The guide member provides collision protection by extending in the vehicle width direction and overlapping the reservoir tank vertically, creating a protective lateral structure. This dimensional arrangement allows the reservoir tank to extend forward for vacuuming access while the guide member's lateral extension provides collision resistance without interfering with the forward extension.
3Strength
If the guide member is positioned laterally outward, then support for the overextending portion is achieved, but the guide member structure becomes more complex
Solution Approach 1:
The guide member serves multiple functions: it provides lateral guidance for the master cylinder during collisions, supports the overextending portion of the reservoir tank through vertical overlap, and contributes to the overall structural integrity of the brake arrangement. This multi-functionality reduces the need for separate support structures, simplifying the overall design despite the lateral positioning.
Data Source
AI summary
A vehicle brake arrangement includes: a reservoir tank mounted on an upper side of a master cylinder; and a guide member provided on a front end surface of the master cylinder, wherein the reservoir tank has an overextending portion extending forward beyond the master cylinder, and the guide member includes a fixed portion fixed to the master cylinder, and an extending portion extending forward from the fixed portion and overlapping in a vehicle up-down direction with the overextending portion.