Disc Brake Pad Guide Member With Elastic Locking Tab for Noise Reduction
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Solution Overview
Problem
Disc brake pad guide members in yoke systems often generate noise during braking due to sudden contact of the pad ears with their housings, and existing solutions like springs fail to effectively address geometric defects and noise generation.
Innovation Solution
A guide member made of spring steel, with a U-shaped body and a locking tab that projects at an angle to create a spring effect, providing elastic support and reducing play, is fixed to the yoke arm and housing, enhancing braking sensitivity and noise reduction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a spring is placed between the tab and groove to cushion impact, then noise is reduced, but the device complexity increases
Solution Approach 1:
The patent extracts the spring element from a separate component and integrates it into the guide member itself through the locking tab mechanism. The locking tab is formed as an integral elastic element of the guide member, eliminating the need for a separate spring component while maintaining the noise-cushioning function.
Solution Approach 2:
The guide member and spring element are merged into a single integrated component. The locking tab serves dual functions: guiding the pad movement and providing elastic cushioning through its deformation capability, combining guiding and damping functions in one element.
2Reliability
If the guide element is securely fixed to reduce play, then braking sensitivity is enhanced, but the risk of noise from rigid contact increases
Solution Approach 1:
The locking tab is designed with elastic properties that allow it to dynamically adapt to contact conditions. During normal operation, it maintains firm contact for sensitivity, but during impact events, it deforms elastically to absorb shock and reduce noise, providing both rigidity and compliance as needed.
Solution Approach 2:
The material properties of the locking tab are selected to provide appropriate elastic deformation characteristics. The tab's geometry and material composition are optimized to change its effective stiffness based on the applied load, maintaining firm contact during normal braking while cushioning impact forces.
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 guide member effectively reduces noise and play by utilizing the elasticity of the locking tab and radial spring, ensuring smooth braking and pad movement, while maintaining structural rigidity and balance.
Implementation Method 1
The lifting of the inner radial surface relative to the lower surface of the housing, due to the protruding locking tab, creates a spring effect that lifts the guide body and presses it against the upper surface of the housing
Implementation Method 2
a spring is placed between each tab and its groove. The damping is achieved by the deformation of the spring, the shape of which is adapted to the force exerted by the brake pad during its tangential movement
Data Source
Figure 1~4
AI summary
The invention relates to a member (4) for guiding a disc brake pad that is secured by the lugs thereof in the housing of the arms of the brake calliper. The member (4) comprises a body having a U-shaped section formed by an inner radial surface (42), a base (41) and an outer radial surface (43) disposed in the housing in the arm. The inner side of the body is bordered by an inner supporting surface (45) disposed against the inner surface (225) of the arm and an outer supporting surface (44) disposed against the front (251) of the stud (25) to which the member (4) is secured. The aforementioned surface (44) extends into a supporting surface (45) toward the front. The body comprises a locking tongue (48) that extends beyond the edge of the boy in order to be hooked in the housing (22).