Brake Disc Axial Securing via Segmented Notch Tabs
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Solution Overview
Problem
Existing brake discs with teeth engagement for torque transmission and axial securing between the friction ring and pot can lead to axial run-out deviations and brake judder due to axial offset, resulting in vibrations during braking.
Innovation Solution
The use of notches and tabs in the pot toothing, specifically formed on the pot tooth gaps, provides increased elasticity and stability for axial securing, preventing permanent axial displacement of the friction ring relative to the pot, and simplifies assembly by engaging cup teeth with ring tooth gaps and ring teeth with cup tooth gaps.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If holding elements are used for axial securing between the friction ring and pot, then axial securing is achieved, but axial offset occurs leading to axial run-out deviations and brake judder
Solution Approach 1:
The holding elements are segmented into multiple distributed elements (first and second holding elements) positioned at different locations around the pot, rather than using a single centralized securing mechanism. This segmentation distributes the axial securing forces and reduces concentrated stress that causes axial offset and run-out deviations.
Solution Approach 2:
The holding elements have specific geometric configurations (radially outward direction, engagement with friction ring) that are optimized for their local function of axial securing. The notches and tabs are positioned at specific locations (first and second axial ends) to provide localized elastic deformation capacity exactly where needed for axial alignment.
2Stability of the object's composition
If conventional axial securing methods are used, then axial alignment is achieved, but the structure becomes complex and assembly is difficult
Solution Approach 1:
The axial securing function is merged with the existing toothed engagement structure. The notches and tabs are integrated into the pot toothing geometry, combining torque transmission and axial securing functions into a unified structure rather than adding separate axial securing components.
Solution Approach 2:
The notches and tabs are designed to automatically engage and provide axial securing during the normal assembly process. The elastic deformation of the notches and engagement of the tabs occur automatically when the friction ring is pressed onto the pot, eliminating the need for separate adjustment or complex assembly procedures.
3Stability of the object's composition
If rigid axial securing is used, then axial offset is prevented, but elasticity is reduced causing permanent displacement under axial forces
Solution Approach 1:
The notches are designed with elastic deformation capacity, allowing them to dynamically adjust under axial loads. Instead of rigid fixed geometry, the notches can elastically deform to accommodate temporary axial forces while maintaining overall axial securing, preventing permanent displacement.
Solution Approach 2:
The elastic notches act as pre-designed cushioning elements that can absorb and accommodate axial force variations before permanent displacement occurs. The notches provide a buffer zone that protects the rigid toothed engagement from excessive axial forces.
Data Source
Figure 1
Figure 2~3
Figure 4
AI summary
The invention relates to a brake disc (1) having a hub (3) and a friction ring (2), which has ring toothing (13) featuring ring teeth (14, 15) directed radially inward and ring tooth gaps (16) arranged in a circumferential direction (5) between adjacent ring teeth (14, 15). The ring toothing (13) meshes with a hub toothing (7) belonging to the hub (3), which comprises hub teeth (7) directed radially outward and which, in the circumferential direction (5), are each separated from one another by a hub tooth gap (10, 11). Securing the friction ring (2) axially in relation to the hub (3) is achieved in that a notch (17) is formed on at least one first hub tooth gap (10), which projects radially outward and engages radially over the respective ring tooth (14, 15) meshing with said first hub tooth gap (10) at a first axial end (19).