Caliper Brake Pad Sliding Geometry for Thermal Disk Deformation
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Solution Overview
Problem
Conventional caliper brakes experience performance and stability issues due to thermal deformation of the disk, leading to one-sided wear of brake pads, noise, and reduced braking efficiency, as the disk's temperature increase causes eccentric pressure and uneven contact with brake pads.
Innovation Solution
The caliper brake design includes inclined pad plates and a carrier with a slide groove that allows diagonal sliding, along with an inclined pressing member and finger, ensuring even contact with the thermally deformed disk, and incorporates heat dissipation holes to manage thermal energy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the disk is thermally deformed due to friction heat, then the brake pads experience one-sided wear and eccentric pressure, but the brake performance and stability deteriorate
Solution Approach 1:
The patent applies asymmetry by positioning the pressing member at an angle of 5-15 degrees relative to the axis of the disk, rather than symmetrically along the axis. This asymmetric positioning allows the pressing member to compensate for thermal deformation of the disk, ensuring uniform contact between brake pads and disk surface even when the disk becomes eccentric due to heat, thereby preventing one-sided wear and maintaining brake performance stability
Solution Approach 2:
The patent changes the geometric parameter of the pressing member's positioning angle (5-15 degrees) to adapt to thermal deformation conditions. By adjusting this angular parameter, the system compensates for the eccentricity caused by thermal expansion of the disk, maintaining optimal contact pressure distribution and preventing performance deterioration
2Ease of manufacture
If the pressing member is positioned along the axis of the disk, then the structure is simple, but one-sided wear occurs due to thermal deformation
Solution Approach 1:
The pressing member is positioned asymmetrically at an angle of 5-15 degrees relative to the disk axis, deviating from the simple axial positioning. This asymmetric configuration compensates for thermal deformation effects, ensuring uniform contact between brake pads and disk surface, thereby improving manufacturing precision in terms of contact uniformity while maintaining reasonable structural simplicity
3Power
If the brake pads clamp the disk with high friction force, then braking power is improved, but thermal energy generation increases causing disk temperature to reach 700°C
Solution Approach 1:
The patent converts the harmful effect of thermal deformation into a beneficial compensation mechanism. The asymmetric positioning of the pressing member (5-15 degrees from axial position) is designed to counteract the eccentricity caused by thermal expansion, transforming the thermal deformation problem into an opportunity for self-compensation, thereby maintaining uniform contact and preventing one-sided wear even at high temperatures up to 700°C
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 prevents one-sided wear, noise, and performance degradation by ensuring uniform contact between the brake pads and the disk, improving stability and productivity while reducing costs and enhancing marketability.
Implementation Method 1
the brake pads clamp the disk inward to generate frictional force and utilize it as a braking force
Implementation Method 2
The thermal energy generated by friction between the brake pads and the disk in the caliper brake is considerable
Implementation Method 3
the temperature of the disk may increase to 700° C., and the disk having increased temperature is thermally deformed
Data Source
AI summary
Disclosed herein is a caliper brake including a disk that rotates together with a wheel, a pair of pad plates disposed on both sides of the disk, respectively, and a carrier that is fixed to a vehicle body and accommodates the pair of pad plates therein, wherein the pair of pad plates include protrusions protruding from both side ends thereof, and the carrier includes a slide groove that is recessed from the inner surface to the outer side thereof so that the protrusions are inserted and supported, and is recessed to be inclined in a reciprocating direction so that the pair of pad plates are slidable diagonally.