Disc Brake Caliper Body Structure for Rigidity, Cooling, and Low Weight
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Solution Overview
Problem
Existing caliper designs for disc brakes face challenges in achieving a balance between being rigid and structurally strong, while also being lightweight and compact, with sufficient ventilation to prevent overheating, and accommodating the limited space within wheel rims.
Innovation Solution
A caliper body design featuring two elongated portions connected by a caliper bridge, with seat walls and a flange for fixing, made from high-strength materials like steel to maintain rigidity and reduce axial thickness for compactness and ventilation, allowing for efficient heat dissipation and reduced unsprung weight.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the caliper body is made with thick walls to ensure rigidity and structural strength, then the caliper can resist deformation during braking action, but the weight of the caliper increases
Solution Approach 1:
The caliper body is made from aluminum alloy, a composite material that provides high strength-to-weight ratio. The aluminum alloy structure with optimized geometry achieves the required rigidity and structural strength while maintaining low weight, resolving the contradiction between strength and weight in the caliper design.
Solution Approach 2:
The caliper body features variable wall thickness with strategic reinforcement in high-stress areas (such as around the piston mounting and brake pad contact zones) while maintaining thinner walls in less critical areas. This local quality approach ensures structural strength where needed while minimizing overall weight.
2Temperature
If large openings are made on the caliper body for ventilation, then heat dissipation from the brake disc is improved, but the structural strength of the caliper body is weakened
Solution Approach 1:
The ventilation system is segmented into multiple strategically positioned openings and channels within the caliper body structure. This segmentation allows heat to be dissipated through multiple pathways while the remaining structural material maintains sufficient strength, resolving the contradiction between heat dissipation and structural integrity.
Solution Approach 2:
The caliper body incorporates a porous or lattice-like internal structure that provides extensive surface area for heat dissipation while maintaining structural strength. This porous architecture allows efficient thermal exchange with the surrounding air while the interconnected structure retains mechanical integrity.
3Volume of moving object
If the caliper body dimensions are reduced to fit within wheel rim space, then the space utilization is improved, but the rigidity of the caliper body is reduced
Solution Approach 1:
The caliper body utilizes three-dimensional space optimization with complex geometry that maximizes structural efficiency within the constrained volume. By employing spatial arrangements and multi-directional bracing structures, the caliper achieves high rigidity in a compact form factor, resolving the contradiction between compactness and rigidity.
Solution Approach 2:
The use of aluminum alloy with optimized geometric configuration provides high stiffness-to-volume ratio, enabling the caliper to maintain adequate rigidity while occupying minimal space within the wheel rim assembly.
Data Source
AI summary
A caliper body of a caliper for a disc brake may have two opposite elongated portions, each adapted to face one of the two opposite braking surfaces of the disc of disc brake. The two opposite elongated portions are connected to each other by at least one caliper bridge. At least one of the two opposite elongated portions may have seat walls which delimit at least one seat, adapted to house at least one portion of a thrusting element. The thrusting element may be adapted to determine a thrusting action against at least one brake pad associable with the caliper body to press the at least one brake pad against one of the two opposite braking surfaces. The seat walls may have at least one seat bottom wall, in which the axial thickness of the seat bottom wall is less than 5 mm.