Disc Brake Pad Back Plate Layout for Stable Light Braking
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Solution Overview
Problem
Disc brake pads in existing disc brake devices experience instability during light braking, leading to brake noise due to insufficient moment support and interference with other components when using a pad clip to apply a pressing force radially outward.
Innovation Solution
A disc brake pad design that includes a back plate with a clip insertion portion and pin insertion portions, allowing for radial outward pressing by a pad clip while maintaining lining area and avoiding interference, using a pair of pins for suspension and a pad clip to stabilize the pad's posture during braking.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a pad clip is used to apply pressing force radially outward to stabilize the pad posture, then brake noise is reduced and pad stability is improved, but the pad clip interferes with other components and insufficient moment support causes instability during light braking
Solution Approach 1:
The pressing force application function is extracted from a separate pad clip component and integrated into the back plate structure itself. The back plate includes a pressing force application portion that directly applies the radially outward pressing force, eliminating the need for a separate pad clip and its associated interference problems while maintaining the stabilizing effect
Solution Approach 2:
The back plate is designed to combine multiple functions: it supports the lining, applies radially outward pressing force through the pressing force application portion, and provides moment support through its structural design. This merging of functions into a single integrated component eliminates the interference issues caused by separate pad clips while maintaining pad stability
2Force
If the back plate structure is modified to accommodate pad clip insertion, then pressing force can be applied, but the lining area is reduced and interference with other components occurs
Solution Approach 1:
The pressing force application function is merged into the back plate structure itself. The back plate includes a pressing force application portion that directly applies the radially outward pressing force without requiring a separate pad clip, thereby maintaining the full lining area while achieving the necessary pressing force for stability
Solution Approach 2:
The back plate is designed as a multi-functional component that simultaneously provides structural support, applies pressing force, and maintains the full lining area. The integrated design allows the back plate to perform multiple functions without requiring additional components that would reduce the effective lining area
Data Source
AI summary
A disc brake pad which is supported by a pair of pins to a pad support member so that the disc brake pad is movable in an axial direction, include a lining and a back plate supporting a back surface of the lining. The back plate includes a clip insertion portion where part of a pad clip is inserted in the axial direction, at an intermediate portion of a radially outer side portion in a circumferential direction, includes pin insertion portions where the pins are respectively inserted in the axial direction, at both sides of the radially outer side portion in the circumferential direction with the clip insertion portion located therebetween. The clip insertion portion includes, on a radially outer side portion of an inner peripheral surface thereof, a pressed surface where a pressing force directed radially outward is applied from the pad clip.