Bicycle Caliper Fluid Channel Layout for Even Piston Activation
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Solution Overview
Problem
Conventional bicycle calipers suffer from uneven piston activation during braking due to fluid channel arrangements, leading to decreased braking performance and fluid leakage issues at the interface of their outer casing components.
Innovation Solution
The bicycle caliper design features a casing assembly with specific fluid channels and sealing rings to ensure even piston activation and prevent fluid leakage, where the first fluid channel penetrates through piston chambers, and the second fluid channel is in communication with the first channel's openings to synchronize piston movement, while sealing rings are used to enhance fluid tightness between casing components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the conventional fluid channel arrangement is used, then the structure is simple, but the pistons are not activated simultaneously leading to poor braking performance
Solution Approach 1:
The fluid channel is divided into multiple independent channels (first fluid channel, second fluid channel, third fluid channel) that separately supply hydraulic fluid to different pistons. This segmentation ensures each piston receives fluid pressure independently and simultaneously, resolving the activation timing issue while maintaining manageable structural complexity through modular channel design.
2Ease of manufacture
If two shells are assembled to form the outer casing, then the manufacturing is easier, but fluid leakage occurs at the interface
Solution Approach 1:
A sealing ring is introduced as an intermediary component between the first shell and second shell at their mating interface. This sealing ring prevents hydraulic fluid from leaking through the joint between the two shells, thereby maintaining fluid tightness while preserving the manufacturing advantages of using separate assembled shell components.
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 design improves braking performance by reducing time differences in piston activation and enhances fluid tightness, ensuring pistons are evenly forced and minimizing oil leakage, resulting in better braking efficiency and reliability.
Implementation Method 1
when braking, the pressure forces the fluid to move into the caliper, pistons housed in the caliper will press the brake pads against the brake disk
Implementation Method 2
the pressure forces the fluid to move into the caliper, pistons housed in the caliper will press the brake pads against the brake disk, resulting friction to stop or slow the wheel spinning
Implementation Method 3
at least two sealing rings, the sealing rings are respectively sleeved on the first body portion of the first fastener and located at the first mount hole of the first casing body and the first through hole of the second casing body to prevent the hydraulic fluid from leaking
Data Source
AI summary
The disclosure provides a bicycle caliper including a casing assembly and a plurality of pistons. The casing assembly has a first fluid inlet, a second fluid inlet, a first fluid channel, a plurality of piston chambers, and a second fluid channel. The first fluid channel has a first connection opening and a second connection opening opposite to each other. The first connection opening and the second connection opening of the first fluid channel are respectively in fluid communication with the first fluid inlet and the second fluid inlet. The first fluid channel penetrates through the piston chambers. Two opposite openings of the second fluid channel are respectively in fluid communication with the first connection opening and the second connection opening of the first fluid channel, and the second fluid channel does not penetrate through the piston chambers. The pistons are respectively and movably disposed in the piston chambers.