Brake Pad Shim Assembly for Low-Noise Sliding Stability
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Solution Overview
Problem
Conventional brake pads generate noise due to friction, which affects ride quality and braking force, and existing solutions do not adequately address this issue.
Innovation Solution
A brake pad design featuring a friction member, a back plate, a slide guide shim, and a slide shim made of the same stainless material, with lubrication parts and restriction protrusions to reduce friction and prevent galvanic corrosion, allowing the slide shim to slide smoothly on the slide guide shim, thereby minimizing noise generation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional brake pads use friction materials to stop the rotary motion part, then the braking function is achieved, but noise is generated due to friction force
Solution Approach 1:
The brake pad is divided into multiple functional layers: friction member, back plate, slide guide shim, and slide shim. This segmentation allows each layer to perform its specific function - the friction member provides braking force while the shim layers reduce friction and noise during pad movement
Solution Approach 2:
The slide guide shim and slide shim act as intermediary elements between the back plate and the friction member. These shims reduce direct metal-to-metal contact and friction, thereby minimizing noise generation while maintaining the braking function through the friction member
2Ease of manufacture
If different materials are used for slide guide shim and slide shim, then manufacturing flexibility is improved, but galvanic corrosion occurs due to material contact
Solution Approach 1:
The slide guide shim and slide shim are made of the same material (e.g., stainless steel), creating homogeneous material contact between these components. This eliminates galvanic corrosion that would occur with dissimilar materials, ensuring long-term reliability while still allowing manufacturing flexibility in selecting the specific material type
3Stability of the object's composition
If the slide shim is constrained too much, then positional stability is improved, but movement smoothness deteriorates
Solution Approach 1:
The constraint system is segmented into multiple restriction protrusions distributed across the back plate, each engaging with corresponding features on the slide shims. This distributed constraint approach provides positional stability while allowing smooth movement through proper clearance design
Solution Approach 2:
Different regions of the slide shim assembly have different degrees of constraint: the restriction protrusions provide localized positional control, while the lubrication parts and contact surfaces allow smooth movement. This local differentiation of constraint quality achieves both stability and smoothness
4Object-generated harmful factors
If lubrication parts are added to reduce friction, then noise reduction is improved, but device complexity increases
Solution Approach 1:
The lubrication parts are merged into the existing shim structure rather than being separate components. The lubrication features are integrated within the slide guide shim and slide shim themselves, reducing friction and noise without adding significant structural complexity
Solution Approach 2:
The lubrication parts are designed to automatically provide lubrication during normal operation, with lubricant distributed through the contact surfaces as the shims move. This self-service approach reduces noise without requiring external lubrication systems or complex control mechanisms
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 design effectively reduces friction force and noise during brake operations by allowing the slide shim to slide smoothly on the slide guide shim, preventing galvanic corrosion and excessive deformation, and ensuring stable movement of the brake pad, thus enhancing ride quality and braking performance.
Implementation Method 1
The slide guide shim body may have a lubrication part having lubricating oil stored therein
Implementation Method 2
The slide guide shim may further include a buffer extended from the slide guide shim body so as to be bent toward the friction member, covering each of the pair of mounting protrusions, and having an elastic part formed at a portion brought into contact with the torque member or the pad liner
Implementation Method 3
a plurality of restriction protrusions formed on the other surface of the back plate body so as to be spaced apart from each other, formed through the slide guide shim and the slide shim, and configured to restrict the movement of the slide shim
Data Source
AI summary
A brake pad for a brake apparatus may include: a friction member brought into contact with a brake disk; a back plate coupled to the friction member, and movably mounted on a torque member or a pad liner coupled to the torque member; a slide guide shim mounted on the back plate; and a slide shim movably mounted on the back plate, covering the slide guide shim, and slidably disposed on the slide guide shim.