Brake Discs with Bell for Uniform Hub Cooling
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Solution Overview
Problem
Existing disc brake systems for commercial vehicles fail to provide uniform cooling for the hub and bearing, leading to potential overheating and malfunction during frequent and intense braking, especially on steep inclines.
Innovation Solution
A disc brake disc design featuring a drum with a radially external edge and inclined openings that allow for the free circulation of cooling air between the drum and hub, ensuring comprehensive cooling of both the braking band and the hub, while maintaining a compact overall dimension.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If the disc brake disc is moved away from the hub to allow cooling air circulation, then cooling of the braking band is improved, but the radial overall dimension increases and uniform cooling of the hub and bearing is not achieved
Solution Approach 1:
The drum is nested within the hub structure, with the drum's radially external edge positioned inside the hub's internal cylindrical surface. This nesting allows cooling air to circulate in the interspace between the drum and hub, achieving uniform cooling of both components without increasing radial dimension
Solution Approach 2:
The invention shifts the cooling approach from radial movement of the disc away from the hub to axial and circumferential air flow through the interspace. The inclined openings provide a third dimension for air flow, enabling comprehensive cooling without radial expansion
2Device complexity
If cooling air is circulated only in proximity to the hub facing the vehicle, then the disc structure is simplified, but uniform cooling of the hub and bearing is not achieved
Solution Approach 1:
The hub is segmented into multiple cooling zones through the distribution of inclined openings around its circumference. Each opening creates a localized cooling path, and collectively they provide uniform cooling across the entire hub and bearing assembly
Solution Approach 2:
The inclined openings are strategically positioned and angled to direct cooling air to specific areas of the hub and bearing. Each local region receives tailored cooling based on its thermal requirements, achieving uniform overall cooling
3Length of moving object
If the disc brake disc is connected close to the hub, then the radial dimension is reduced, but cooling air cannot freely circulate between the drum and hub
Solution Approach 1:
The inclined openings are pre-configured to guide cooling air into the interspace between the drum and hub before the air reaches the bearing area. This preliminary direction of air flow ensures effective cooling without requiring the disc to be positioned far from the hub
Solution Approach 2:
The inclined openings act as intermediary elements that mediate between the external cooling air source and the interspace between drum and hub. They facilitate air circulation and heat transfer without requiring large radial clearance
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 effectively dissipates heat across the entire hub and bearing, preventing overheating and ensuring the correct operation of the disc brake system even under heavy use, by allowing uniform cooling of the hub and bearing.
Implementation Method 1
said edge (10) delimits at least one opening (14) which communicates said interspace (13) with the space outside the drum (12)
Implementation Method 2
The braking action of the vehicle transforms, due to the friction between the components thereof, kinetic energy into thermal energy
Implementation Method 3
This design effectively dissipates heat across the entire hub and bearing, preventing overheating and ensuring the correct operation of the disc brake system
Data Source
AI summary
Discs for disc brakes arranged around a rotational axis, comprising: a braking band and a drum, said drum comprising an edge arranged radially outside a portion for connecting the drum to a hub, said drum further comprising a drum body connecting said edge to the braking band and being suitable to create an interspace between the drum and the hub accommodated therein, said edge delimiting at least one opening with communicates the interspace present between the drum body and the hub with the external of the drum, said opening being arranged radially outside said housing for the hub, and said openings delimited by walls having at least one section inclined with respect to the axial direction are provided.