Motorcycle Brake Disc Thermal Deformation Compensation
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Solution Overview
Problem
Existing disc braking devices for motorcycles suffer from vibration phenomena and uneven wear due to inadequate self-alignment and thermal deformation, leading to premature component replacement and functionality issues.
Innovation Solution
A disc braking device that allows the brake disc to axially slide and radially dilate, using elastic means to maintain optimal positioning and prevent elastic return, ensuring consistent contact between the disc and pads, and incorporating a bushing with a radial edge for protection and precise centring.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If elastic means are arranged to allow axial self-alignment of the brake disc with the brake pads, then the adaptation and self-alignment capability is improved, but the elastic return causes discontinuous sliding contacts and vibration phenomena
Solution Approach 1:
The patent extracts the elastic return function from the system by removing elastic means that cause axial thrust, while retaining the mobile coupling mechanism for radial dilation and thermal expansion compensation. This eliminates the discontinuous sliding contacts and vibration phenomena caused by elastic return, while maintaining the necessary adaptability through the mobile coupling.
Solution Approach 2:
The patent transitions from axial elastic positioning to radial mobile coupling for thermal dilation compensation. By changing the dimension of thermal compensation from axial (via elastic means) to radial (via mobile coupling with radial slots), the system maintains adaptability without the harmful axial elastic return that causes vibrations.
2Ease of operation
If the brake disc is allowed to float axially with respect to its support, then the axial self-alignment between brake disc and brake pads is improved, but the non-uniform wear and vibration phenomena occur due to elastic return
Solution Approach 1:
The patent removes the elastic return mechanism that causes the brake disc to return to a neutral position after braking, which eliminates the discontinuous sliding contacts and associated vibrations. The axial floating capability is retained for self-centring, but the harmful elastic rebound is extracted from the system.
Solution Approach 2:
The patent ensures continuous contact between the brake disc and pads by eliminating elastic return that causes separation. The mobile coupling maintains continuous radial dilation capability while the removed elastic axial thrust prevents discontinuous sliding contacts, ensuring continuous useful braking action without vibrations.
3Manufacturing precision
If elastic means are used to maintain disc positioning, then the optimal positioning during braking is improved, but the elastic deformation and thermal dilation cause misalignment and wear
Solution Approach 1:
The patent changes the parameter of thermal compensation from elastic axial deformation to radial mobile coupling movement. The mobile coupling with radial slots allows the brake disc to dilate radially during thermal heating without causing axial misalignment, maintaining positioning accuracy while accommodating thermal expansion.
Solution Approach 2:
The patent moves thermal expansion compensation from the axial dimension (where elastic means cause misalignment) to the radial dimension (where mobile coupling with radial slots provides free dilation). This dimensional change allows thermal deformation without compromising axial positioning accuracy.
4Stability of the object's composition
If the disc is constrained to prevent radial dilation, then the structural stability is improved, but the thermal expansion during braking causes deformation and vibration
Solution Approach 1:
The patent introduces dynamic radial adjustment capability through the mobile coupling mechanism with radial slots. The brake disc can dynamically dilate radially during thermal heating from braking, while the collars maintain axial positioning stability. This dynamic adaptation prevents thermal deformation-induced vibrations while preserving structural stability.
Solution Approach 2:
The patent segments the constraint function into two independent dimensions: axial positioning (maintained by fixed collars for stability) and radial expansion (allowed by mobile coupling with radial slots for thermal accommodation). This segmentation enables simultaneous structural stability and thermal expansion capability.
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 solution reduces thermal deformation and vibration, maintains optimal disc positioning, and extends component lifespan by allowing automatic adaptation to wear, ensuring stable braking performance and reduced maintenance.
Implementation Method 1
elastic means arranged between said radial seat and said bushing, said elastic means exerting an elastic action in the tangential direction between said seat and said bushing with interposition of friction
Implementation Method 2
elastic means arranged between said radial seat and said bushing, said elastic means exerting an elastic action
Implementation Method 3
allows a radial dilation, said dilation being exerted through the effect of the heating produced by the heat generated by friction
Data Source
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AI summary
A braking device (1), unusually capable of low operating vibration and of compensation of thermal deformations, comprises: a brake disc (2) having an axial - symmetrical body (3), said body (3) comprising a brake band (4), said body (3) comprising at least two connection portions (7) of the brake disc (2); said brake band (4) comprising at least two radial seats (10) that each define a dragging surface (13), arranged in the axial direction; said radial seat (10) also defines an opposite abutment surface (14) substantially parallel to said dragging surface (13); said disc device also comprises at least two bushings (15); each of said bushings (15) comprising at least one portion (18) that is inserted in said radial seat (10); said braking device (1) also comprises elastic means (19) arranged between the radial seat (10) and said bushing (15); - said elastic means (19) exerting an elastic action in the tangential direction (C-C) between the bushing (15) and the radial seat (10); said elastic means (19) being anchored to the radical seat (10) and creating a predeterminated resistance action suitable for controlling the axial movement (A-A) of the break disc (2) with respect to the bushing (15).