Brake Assembly with Axially Movable Pads for Noise Reduction
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Solution Overview
Problem
Existing brake assemblies for vehicle wheels suffer from issues such as brake noise generation and brake dust emission, which are not adequately addressed by current disc or drum brake designs.
Innovation Solution
A brake assembly with axially movable brake pads positioned between contact surfaces, which are arranged at an axial distance from each other, allowing for a unique configuration that reduces vibrations and noise, and incorporates a brake force generator to move the pads outward, providing a braking effect while being shielded from environmental factors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional disc brake designs are used with brake pads clamping the brake disc, then effective braking is achieved, but brake noise and dust emission increase
Solution Approach 1:
Instead of positioning brake pads on the outer surfaces of the brake disc, the invention inverts the arrangement by positioning brake pads on the inner surfaces of the brake disc, between the two disc portions. This inversion allows the brake pads to be shielded from direct environmental exposure, reducing noise and dust emission while maintaining braking effectiveness through friction against the contact surfaces.
Solution Approach 2:
The brake pads are nested within the brake disc structure, specifically positioned in the space between the two brake disc portions. This nesting arrangement protects the brake pads from direct exposure to external environments, reducing brake dust emission and noise generation, while still allowing them to contact the inner surfaces of the disc for effective braking.
2Object-generated harmful factors
If brake pads are positioned between contact surfaces and moved axially apart, then brake noise is reduced and components are shielded, but the complexity of the brake assembly increases
Solution Approach 1:
The brake disc is segmented into two separate brake disc portions with contact surfaces facing each other, creating a space for the brake pads. This segmentation allows the brake pads to be positioned and moved axially between the contact surfaces, providing noise reduction while maintaining a manageable structural complexity through modular design.
3Reliability
If brake pads are axially moved apart to contact the braked member, then a unique braking mechanism is achieved, but the manufacturing complexity increases
Solution Approach 1:
The brake pads are designed with axial movability, allowing them to be dynamically positioned between the contact surfaces during operation. This dynamic capability enables the unique braking mechanism where pads are spread axially to contact the braked member, while the modular design keeps manufacturing complexity manageable through standardized components.
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
The design reduces brake noise and dust emission by optimizing new parameters, enhancing the longevity of brake components and providing a noise shielding effect, while maintaining effective braking performance.
Implementation Method 1
move the brake pads axially apart from one another, thereby bringing each brake pad into contact with one of the contact surfaces of the braked member
Data Source
AI summary
A brake assembly includes a braked member that is coupable or coupled to the vehicle wheel for a joint rotation therewith about a rotational axis, the braked member having contact surfaces that are arranged at an axial distance from one another and a braking unit that comprises a brake force generator and at least two brake pads, the brake pads being positioned in between the contact surfaces, wherein the brake force generator is configured move the brake pads axially apart from one another, thereby bringing each brake pad into contact with one of the contact surfaces of the braked member.