Motorcycle Brake Disc Spring-Loaded Anchoring
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Solution Overview
Problem
The existing brake disc anchoring systems fail to ensure complete centring of the brake track with the core, leading to issues like increased temperature, vibration, and jamming due to off-centring, especially at high temperatures.
Innovation Solution
A brake disc design featuring radial legs with circular holes and a spring-loaded anchoring system, where pins with heads and through rods maintain the legs and core aligned, allowing controlled expansion and preventing jamming, with a circlip or elastic ring retaining the spring for quick assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If anchor bushings are used to secure the brake track to the core, then robustness and durability are improved, but the brake track cannot expand freely at high temperatures leading to jamming
Solution Approach 1:
The anchoring system transitions from a static rigid connection (anchor bushings) to a dynamic system where the brake track can move laterally within the recesses. The track is constrained by stops at the extremes of movement but can freely position itself during thermal expansion, resolving the contradiction between structural integrity and thermal adaptability.
Solution Approach 2:
The brake track is divided into multiple independent segments (radial legs with mounting holes) that can move relative to each other and to the core. This segmentation allows each leg to expand independently while maintaining overall structural coherence, enabling thermal expansion without compromising the robustness of the anchoring system.
2Adaptability or versatility
If anchor pins are used to reduce weight, then the brake track can expand preventing jamming, but the anchoring system becomes less robust
Solution Approach 1:
The system combines the lightweight advantage of anchor pins with the robustness of a constrained dynamic structure. The brake track can expand dynamically within the recesses while the stops provide robust lateral constraints, achieving both thermal adaptability and structural reliability simultaneously.
3Ease of manufacture
If the brake track is anchored rigidly to the core, then positioning is simplified, but self-centring is prevented leading to off-centring and vibration
Solution Approach 1:
The brake track is designed to self-centre automatically through friction engagement with the brake pads. The lateral movement capability within the recesses allows the track to adjust its position until it achieves optimal centring, eliminating the need for complex self-centring mechanisms while maintaining manufacturing simplicity.
4Ease of operation
If the brake track is allowed to float relative to the core, then self-centring is improved, but temperature control deteriorates due to increased friction
Solution Approach 1:
The anchoring system provides different degrees of freedom in different directions: lateral movement is permitted to enable self-centring, while radial movement is constrained to maintain proper positioning. This localized differentiation of constraints allows self-centring without excessive frictional heating, as the track only moves laterally during adjustment rather than continuously.
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
This design ensures consistent self-centring and controlled expansion, maintaining system stability and preventing jamming at high temperatures, thereby reducing vibration and temperature increases.
Implementation Method 1
a spring mounted on the protruding end of the pin and which exerts a pressure against the second face of the legs of the track and of the core maintaining them aligned
Implementation Method 2
the brake track from becoming jammed when reaching high temperatures
Data Source
Figure 1~2
Figure 3~4
AI summary
Brake disc for motorcycles; comprising: a brake track (2) with radial legs (21), a core (1) provided with radial recesses (11) wherein respective end portions of the legs of the brake track are housed, and means for anchoring the brake track to the core of the disc. The legs of the track and the peripheral portion of the core, which carries the recesses, have the same thickness and are arranged in a coplanar manner. Said legs (21) comprise a circular hole wherein pins (3) provided with a head (31) which acts against a first face of the brake track and of the core are mounted, and a through rod (32) whereon a spring (4) which presses on the second face of the track and of the core is mounted, maintaining them coplanar, and a retaining element (5) of the spring.