Brake Pad Support Spring Structure for Stable Pad Sliding
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Solution Overview
Problem
Conventional disk brake devices face issues with unstable support of brake pads due to distortion in the elastic member, leading to increased sliding resistance and potential brake pad floating, which affects braking performance.
Innovation Solution
A disk brake device with a pad support spring featuring a U-shaped portion, a tongue piece portion, and a first slit portion, allowing for adjustable elastic force and reduced distortion, thereby stabilizing the brake pad support and minimizing sliding resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the claw portion is formed to project out from the lower surface plate toward the lower wall surface of the pad guide, then the pad spring can be assembled to the pad guide, but the length of the claw portion is shortened making it difficult to adjust the elastic force and susceptible to variations in length
Solution Approach 1:
The elastic member is divided into distinct functional portions: a U-shaped portion for guiding and supporting the friction pad, a claw portion for engagement with the pad guide, and a linking portion connecting these elements. This segmentation allows each portion to be optimized independently for its specific function while maintaining overall assembly integrity.
Solution Approach 2:
The patent modifies the geometric parameters of the elastic member, specifically adding a linking portion between the U-shaped portion and claw portion, and configuring the claw portion to extend in the axial direction. These parameter changes enable proper engagement with the pad guide while maintaining adjustable elastic force characteristics.
2Stability of the object's composition
If the pad spring is assembled to the pad guide with the claw portion hooked to the lower wall surface, then the guide plate portion is held in position, but the lower surface plate is spaced apart from the lower wall surface causing floating and distortion
Solution Approach 1:
Instead of having the claw portion hook from below as in conventional designs, the patent configures the claw portion to extend in the axial direction and engage with the lower wall surface of the pad guide in an inverted manner. This inversion allows the lower surface plate to abut against the lower wall surface, eliminating floating while maintaining positioning stability.
3Force
If the elastic force in warping the upper surface plate toward the lower surface plate is large, then the pad spring can support the friction pad, but the floating of the lower surface plate is promoted causing distortion
Solution Approach 1:
The patent applies different structural characteristics to different portions of the elastic member: the U-shaped portion has high flexibility to provide the necessary biasing force, while the linking portion and claw portion are configured to provide structural stability. This local differentiation allows the upper surface plate to warp with sufficient force while preventing floating and distortion of the lower surface plate.
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 suppresses distortion and floating of the elastic member, ensuring stable brake pad support and smooth movement, reducing the likelihood of brake squeal during gentle braking.
Implementation Method 1
a spring portion that extends from the inner peripheral surface portion so as to incline along the axial direction between the outer peripheral surface portion and the inner peripheral surface portion and that separates the back plate away from the disk rotor
Data Source
AI summary
A pad support spring includes a U-shaped portion comprising an outer peripheral surface portion, an inner peripheral surface portion and a linking surface portion. The U-shaped portion is configured to include: a pad holding portion; a cutout portion provided by cutting out a part from the linking surface portion toward the inner peripheral surface portion; a tongue piece portion which in an unassembled state has a base end formed by the cutout portion on the outer peripheral surface portion side of the pad holding portion and a distal end which projects out from an opposing surface of the inner peripheral surface portion, and which in an assembled state deforms elastically to press a brake pad in conjunction with the U-shaped portion; and a first slit portion provided by cutting out part of a first linking part.