Caliper Brake Seal Groove Structure for Stable Piston Rollback
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional caliper brakes experience a drag phenomenon due to premature deformation of the seal member during high pressure braking, leading to increased braking fluid requirement, invalid stroke, and reduced pedal feel.
Innovation Solution
The caliper brake incorporates a seal member with a protrusion and a seal groove design that allows for controlled elastic deformation, preventing premature deformation and ensuring smooth rollback performance even under high pressure braking, thereby reducing the amount of braking fluid required and improving pedal feel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the elastic deformation movable range of the seal member is increased by expanding the inclined surface of the seal groove, then the rollback performance is improved, but the amount of braking fluid required increases and pedal feel is reduced
Solution Approach 1:
The seal member is designed with non-uniform thickness distribution, where the front end thickness is smaller than the rear end thickness. This local variation in thickness allows the seal member to have different elastic deformation characteristics at different positions, enabling effective rollback while controlling the overall deformation volume and minimizing braking fluid requirements.
Solution Approach 2:
The patent changes the geometric parameters of the seal member, specifically the thickness distribution and the shape of the elastic deformation portion. By optimizing these parameters, the seal member achieves sufficient elastic deformation for rollback without requiring excessive deformation volume, thus reducing the amount of braking fluid needed and improving pedal feel.
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
The design enhances rollback performance, prevents drag phenomenon, and improves fuel efficiency by minimizing the amount of braking fluid needed, thus enhancing the driver's pedal feel without affecting assembly efficiency.
Implementation Method 1
the seal member is deformed and restored by elasticity thereof, and the piston, which has moved forward, retracts again to return its original position by the elasticity of the seal member
Data Source
AI summary
Disclosed herein a caliper brake includes a carrier in which a pair of pad plates are installed to move forward and backward toward a disk; a caliper housing slidably installed on the carrier and provided with a cylinder; a piston installed in the cylinder and configured to move forward and backward toward the pair of pad plates by a braking hydraulic pressure; a seal groove formed to be recessed in an annular shape on an inner surface of the cylinder; and a seal member accommodated in the seal groove, the seal member including a front surface located in a forward direction of the piston; wherein the front surface is provided with a protrusion from which at least a part thereof protrudes.