Disk Brake Shim Hook Retention Mechanism
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Solution Overview
Problem
Existing disk brake systems face inefficiencies during maintenance and operation due to the tendency of shims to drop from the pad, which decreases working efficiency and increases the risk of damage or noise during braking.
Innovation Solution
The disk brake system incorporates a pair of shims with hooks that engage with the pad's structure, preventing the shims from dropping and enhancing stability, while also allowing for smooth sliding and reduced noise through carefully designed hook geometries and contact points.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a shim is provided at the pad, then noise and vibration during braking are reduced, but the shim may drop from the pad during maintenance work
Solution Approach 1:
The shim is divided into a first shim and a second shim with different functions. The first shim has a hook structure that engages with the pad to prevent dropping, while the second shim provides noise reduction. This segmentation allows each component to specialize in one function, resolving the contradiction between reliability and ease of operation.
Solution Approach 2:
The hook structure acts as an intermediary element between the shim and the pad. It provides a mechanical connection that prevents the shim from dropping during maintenance while allowing the shim to remain in place during normal operation, thus resolving the contradiction between braking performance and maintenance workability.
2Productivity
If the shim is easily removable from the pad, then maintenance work efficiency is improved, but the shim may drop during handling
Solution Approach 1:
The hook structure provides dynamic retention - it holds the shim securely during normal operation and maintenance handling, but allows for intentional removal when needed. This dynamic behavior resolves the contradiction between productivity and reliability by adapting to different operational states.
3Ease of manufacture
If the shim structure is simplified, then manufacturing cost is reduced, but the shim may drop from the pad
Solution Approach 1:
The shim is segmented into two separate components with distinct functions. This segmentation allows for simple manufacturing of each individual shim while achieving reliable retention through the hook structure of the first shim. The first shim can be manufactured with a simple hook feature, while the second shim remains a simple flat component.
Data Source
AI summary
A pad includes: a lining; a plate; a first shim installed at a surface of the plate which is opposite to the lining; and a second shim installed at a surface of the first shim which is opposite to the plate, a first hook overhanging at an outer circumferential edge section of the plate and hooked to the outer circumferential edge section of the plate is formed at the first shim, a second hook is formed at the second shim at an outer side of the first hook in a disk radial direction, and the second hook is configured to be hooked to a part of the plate with which the first hook does not come in contact.