Brake Piston Positioning Assembly for Constant Stroke Compensation
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Solution Overview
Problem
Brake systems in automotive vehicles face challenges with wear-induced increases in piston stroke, affecting safety and operability, as existing solutions complicate the integration of return and adjustment springs in a simple and compact manner.
Innovation Solution
A positioning assembly comprising a support member, a first compressible member, and a second compressible member, where the first member is axially supported and compression-loaded along the axis, and the second member is compression-loaded perpendicular to the axis, allowing for frictional engagement with the brake piston to maintain a constant stroke by adjusting the air gap between the piston and brake plates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a return spring and an adjustment spring are integrated in a conventional manner, then the brake system can compensate for wear and maintain constant piston stroke, but the device complexity increases and the structure becomes less compact
Solution Approach 1:
The patent combines the return spring and adjustment spring into a single integrated positioning assembly. The support member with its first and second compression-loaded members merges two previously separate spring functions into one compact unit, reducing device complexity while maintaining the ability to compensate for wear and ensure constant piston stroke.
Solution Approach 2:
The support member serves multiple functions simultaneously: it provides structural support, houses both the return spring (first compression-loaded member) and adjustment spring (second compression-loaded member), and enables wear compensation. This multi-functionality reduces the number of separate components needed while maintaining reliable constant piston stroke.
2Duration of action of stationary object
If the brake piston stroke increases due to wear, then the brake system continues to operate, but vehicle safety and operability are impaired
Solution Approach 1:
The positioning assembly performs preliminary adjustment of the air gap between the brake piston and brake plates. By proactively compensating for wear through the adjustment spring (second compression-loaded member), the system maintains the correct piston stroke before safety issues arise, ensuring vehicle safety is preserved throughout the component's service life.
Solution Approach 2:
The integrated positioning assembly provides continuous feedback-based compensation for wear. As the brake plates and discs wear, the adjustment mechanism automatically compensates by modifying the air gap, ensuring the piston stroke remains constant and vehicle safety is maintained without requiring external intervention.
3Volume of moving object
If a compact positioning assembly is designed, then the brake system becomes more space-efficient, but the integration of multiple compression-loaded members becomes more difficult
Solution Approach 1:
The positioning assembly uses a nested structure where the first compression-loaded member and second compression-loaded member are arranged concentrically on the support member. This nesting approach allows both spring elements to be integrated in a compact configuration, reducing the overall volume of the positioning assembly while maintaining manufacturability through a organized, layered structure.
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 solution ensures a consistent brake piston stroke, compensating for wear and maintaining vehicle safety and operability by integrating the functionality of a return spring and adjustment spring in a compact and efficient manner.
Implementation Method 1
The first compression-loaded member may be compression-loaded or compressible along the axis
Implementation Method 2
The second compression-loaded member may be compression-loaded or compressible perpendicular to the axis
Implementation Method 3
allowing for frictional engagement with the brake piston to maintain a constant stroke by adjusting the air gap between the piston and brake plates
Data Source
AI summary
The present disclosure further relates to a positioning assembly, such as for positioning a brake piston. The positioning assembly comprises a support member extending along an axis, a first compression-loaded member, and a second compression-loaded member, wherein the first compression-loaded member and the second compression-loaded member are axially supported on or configured to be axially supported on the support member. The present disclosure further relates to a brake piston assembly including said positioning assembly.