Disc Brake Pad Clip Stabilizing Pads with Single Sheet Metal
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Solution Overview
Problem
Existing disc brake pad clips face challenges in stabilizing pad attitudes, leading to uneven wear and increased fabrication costs due to complex structures and poor blanking performance, with existing solutions either requiring multiple metal sheets or folding that increases material waste.
Innovation Solution
A pad clip formed by bending a single sheet of metal with engaging plate portions and press pieces that exert elastic forces to stabilize pads, reducing material waste and fabrication costs while maintaining pad attitude stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a pad clip is formed by coupling two sheets of metal plates, then pad attitude stability is improved, but fabrication cost increases and manufacturing complexity increases
Solution Approach 1:
The patent merges two separate metal plates into a single integrated metal plate structure. The pad clip is formed from one continuous metal plate with through holes positioned to engage pins, eliminating the need for coupling separate plates while maintaining pad attitude stability during braking and non-braking operations
2Stability of the object's composition
If elastic engaging portions are folded back to increase elastic force, then pad stabilization is improved, but material waste increases due to poor blanking performance
Solution Approach 1:
The patent performs preliminary positioning of the press pieces by forming them with appropriate lengths and bending directions in the blanking stage. The press pieces extend from the engaging plate portion with their press portions positioned to contact the pads, eliminating the need for subsequent folding operations that would waste material. The elastic force is achieved through the inherent elasticity of the metal plate structure itself
3Stability of the object's composition
If press pieces are positioned to contact both end portions and outer peripheral edges of pads, then pad attitude stability is improved, but clip structure complexity increases
Solution Approach 1:
The patent applies local quality by positioning press pieces at specific locations (both end portions in the rotational direction and outer peripheral edges in the radial direction) where they contact the pads. This localized pressing arrangement stabilizes pad attitude without requiring complex overall structure, as each press piece is simply formed with appropriate length and bending direction
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 stabilizes pad attitudes during both braking and non-braking times, reduces material waste, and lowers production costs by using a single sheet of metal, improving blanking performance and preventing uneven wear.
Implementation Method 1
the press pieces are respectively brought into elastic contact with both end portions in a rotational direction and an outer peripheral edge in a radial direction of a rotor of an outer pad and an inner pad respectively supported by the outer body portion and the inner body portion displaceably in an axial direction of the rotor. Further, the press pieces exert an elastic force directed to an inner side in a radial direction and an elastic force in a direction of being separated from each other to the two pads.
Data Source
AI summary
The pad clip 14d is arranged between pins 12, 12 made to bridge an outer body portion and an inner body portion constituting a caliper and the two pads 10b, 11b. An engaging plate portion 27 is engaged with the respective pins 12, 12 without play. Press pieces 28, 28 formed by folding to bend both end portions in a rotational direction of the engaging plate portion in directions in which the more proximate to the two pads 10b, 11b, the more directed to an outer side in a radial direction are brought into elastic contact with outer peripheral edges of both end portions in a rotational direction of pressure plates 13b, 13b of the two pads 10b, 11b. Thereby, amounts of projecting portions in correspondence with the respective press pieces 28, 28 in a state of a material plate before being folded to bend from the engaging plate portion 27 can be restrained.