Brake Pad Liner Structure for Rattle and Drag Torque Control
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Solution Overview
Problem
Brake apparatuses generate rattle noise and drag torque due to interference between brake pads and brake disks during braking and releasing processes, as existing technologies fail to perfectly space the components and maintain proper contact.
Innovation Solution
A brake apparatus with a pair of pin members, first and second brake pads, a pressing part, and a pad liner that provides an elastic restoring force to the brake pads, ensuring perfect spacing and preventing interference, thereby eliminating rattle noise and drag torque.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If the brake pad is brought into contact with the brake disk during braking process, then braking force is provided, but the parts may interfere with each other generating rattle noise
Solution Approach 1:
A pad liner is introduced as an intermediary component between the brake pad and the pin members. The pad liner includes elastic return parts that contact the brake pad and provide elastic restoring force, preventing direct interference between the brake pad and pin members while enabling smooth braking operation without rattle noise
Solution Approach 2:
The pad liner changes the physical state of the connection between brake pad and pin members by introducing elasticity. The elastic return parts deform and restore, changing the rigid connection into a flexible one that absorbs vibrations and prevents rattle noise during braking
2Reliability
If the brake pad and brake disk are not perfectly spaced apart during releasing process, then drag torque is generated, but achieving perfect spacing is difficult with existing technologies
Solution Approach 1:
The pad liner acts as a mediator that ensures perfect spacing between the brake pad and brake disk during the releasing process. The elastic return parts push the brake pad away from the brake disk with sufficient force to guarantee complete separation, eliminating drag torque
Solution Approach 2:
The elastic return parts provide preliminary anti-action by pre-positioning the brake pad at a predetermined distance from the brake disk before braking occurs. This preliminary spacing action prevents the brake pad from accidentally contacting the brake disk during releasing, avoiding drag torque generation
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 solution effectively prevents the generation of rattle noise and drag torque by ensuring perfect spacing and contact between brake pads and disks, enhancing the braking process and reducing noise and torque-related issues.
Implementation Method 1
a pad liner installed on the pair of pin members, and configured to provide an elastic restoring force to the first and second brake pads such that the first and second brake pads are restored to the original state when the pressing of the pressing part is released
Implementation Method 2
The pad liner may apply a load to the first and second brake pads
Data Source
AI summary
A brake apparatus for a vehicle may include: a pair of pin members installed in a caliper body so as to be spaced apart from each other; a first brake pad movably coupled to the pair of pin members, and contactable with a brake disk; a second brake pad coupled to the pair of pin members so as to be spaced apart from the first brake pad, and contactable with the brake disk; a pressing part installed in the caliper body, and pressing the first brake pad to bring the first and second brake pads into contact with the brake disk; and a pad liner installed on the pair of pin members, and providing an elastic restoring force to the first and second brake pads such that the first and second brake pads are restored to the original state when the pressing of the pressing part is released.