Floating-Caliper Brake Pad Lift Mechanism for Reliable Release
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Solution Overview
Problem
Floating-caliper brakes face the challenge of reliably lifting both brake pads off the brake disk after braking, leading to increased wear and energy losses due to incomplete pad separation, especially in harsh environmental conditions.
Innovation Solution
A lifting part is hinged to the brake caliper at a hinge point and supported on the support structure at a contact point, with a lift drive rotating the lifting part to move the brake caliper relative to the support structure, ensuring both brake pads are lifted off the disk upon release.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional hydraulic floating-caliper brakes use O-rings for resetting, then the brake pad can be pulled back on the piston side, but the elasticity deteriorates over time and the brake pad may stick to its stop or the caliper may jam, rendering the resetting ineffective
Solution Approach 1:
The patent extracts the resetting function from the hydraulic piston-O-ring system and relocates it to a separate resetting mechanism with a resetting lever and resetting spring. This separation allows the resetting function to operate independently from the braking function, eliminating the degradation issues associated with O-ring elasticity over time.
Solution Approach 2:
The resetting lever acts as an intermediary mechanical element that translates the resetting spring's force into motion that lifts both brake pads simultaneously. This intermediary mechanism overcomes the limitation of direct O-ring action on the piston side only.
2Reliability
If springs or elastic elements are used for resetting, then both brake pads can be lifted, but the lifting is not always reliable under harsh environmental conditions
Solution Approach 1:
The resetting spring is pre-loaded to store elastic energy that is released when the brake is released. This preliminary energy storage ensures that sufficient force is available to lift both brake pads reliably, even when environmental factors increase friction or resistance.
Solution Approach 2:
The resetting lever utilizes curved or angled geometries to mechanical advantage, allowing small movements at one end to produce larger movements at the other end. This geometric amplification ensures reliable pad lifting even under adverse environmental conditions.
3Reliability
If a lever mechanism is used for resetting, then brake pads can be reliably lifted, but the implementation becomes complex and difficult to protect from environmental conditions
Solution Approach 1:
The resetting mechanism is merged with the existing caliper structure by integrating the resetting lever into the caliper body and using the piston housing as part of the resetting mechanism. This integration reduces the number of separate components and simplifies the overall structure while maintaining reliable pad lifting.
Solution Approach 2:
The resetting lever serves multiple functions: it acts as a lever arm for the resetting spring, guides the motion of the brake pads, and provides structural support within the caliper. This multi-functionality reduces the need for additional dedicated 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 solution allows for reliable and controlled lifting of both brake pads, reducing wear and energy losses, and is easily integrated and protected from environmental influences.
Implementation Method 1
a lifting part (20) is hinged to the brake caliper (2) at a hinge point (21), and the lifting part (20) is supported on the support structure (7) at a contact point (23)
Data Source
AI summary
The aim of the invention is to ensure a reliable lift of both brake pads of a floating-caliper brake (1) after releasing the brake. This is achieved in that a lifting part (20) is hinged to the brake caliper (2) at a hinge point (21), and the lifting part (20) is supported on the support structure (7) at a contact point (23) at least partly at releasing the floating-caliper brake (1), wherein a lift drive (22) is provided which rotates the lifting part (20) about the hinge point (21) such that a support for the lifting part (20) is produced on the contact point (23), whereby the hinge point (21) and the brake caliper (2) are moved.