Brake Caliper Piston Driver With Non-Friction Coating
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Solution Overview
Problem
The existing electromechanical disc brake systems have complex structures requiring multiple components, leading to high manufacturing costs, particularly due to the need for ball or roller thrust bearings in the drive mechanism of the piston.
Innovation Solution
A non-friction coating, preferably a fluoropolymer coating, is applied directly to the bearing face of the drive member and the bottom of the caliper housing, eliminating the need for these bearings and reducing the number of components, with a metal washer interposed between the bearing face and the housing to enhance the sliding mechanism.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If ball or roller thrust bearings are used in the drive mechanism, then the friction between the drive member head and housing bottom is reduced, but the device complexity and manufacturing cost increase due to the need for additional components
Solution Approach 1:
The patent extracts and eliminates the ball or roller thrust bearing from the drive mechanism by directly applying a non-friction coating to the bearing surfaces of the drive member head and housing bottom, thereby removing the unnecessary component while maintaining the low-friction function
Solution Approach 2:
The patent replaces the mechanical bearing system with a non-friction coating system, substituting the physical contact mechanics of ball/roller bearings with a surface treatment that provides low-friction properties through material science rather than mechanical design
2Reliability
If multiple components are used in the drive mechanism, then the functional requirements are met, but the manufacturing cost increases
Solution Approach 1:
The patent merges the functions of the drive member head, housing bottom, and thrust bearing into a single integrated structure with non-friction coated surfaces, eliminating the need for separate bearing components and reducing assembly complexity
Solution Approach 2:
The patent uses a non-friction coating that can be applied as a relatively simple surface treatment compared to precision-bearing manufacturing, reducing the manufacturing cost while maintaining adequate functional performance throughout the service life
3Device complexity
If a non-friction coating is applied to the drive member, then the number of components is reduced and manufacturing cost decreases, but the coating application process adds complexity
Solution Approach 1:
The patent changes the surface properties of the drive member through coating application, transforming the friction characteristics from high to low without altering the fundamental mechanical structure or requiring additional moving parts
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 manufacturing costs by simplifying the structure and minimizing friction, allowing for a more cost-effective and efficient drive mechanism in electromechanical brakes.
Implementation Method 1
the bottom and/or the abutment face is provided with a non-friction coating
Implementation Method 2
the non-friction coating is a coating of the fluoropolymer type
Data Source
AI summary
An electromechanical brake caliper comprising a caliper body comprising a housing containing a piston and a member for driving a mechanism for moving the piston. The driving member comprises a threaded body and a head comprising a face supported on a bottom of the housing, the supported face being provided with a non-friction coating.