Disk Brake Securing Ring Prevents Backward Rotation
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Solution Overview
Problem
The durability of disk brake components, particularly the corrugated bellows, is compromised by high temperatures generated during braking, leading to increased maintenance costs and complexity due to restricted space conditions, requiring frequent replacement and specialized procedures for the actuating spindle.
Innovation Solution
A disk brake design that eliminates the need for a disengagement prevention mechanism by using a securing ring with axially extending spring arms and radially oriented tabs, allowing for easier assembly and maintenance, with a secondary seal that prevents backward rotation and reduces stress on spring steel components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a disengagement prevention means is added to protect the readjustment device, then the readjustment device is protected against overloading, but the device complexity and assembly difficulty increase
Solution Approach 1:
The securing ring integrates multiple functions: it prevents backward rotation of the actuating spindle, prevents axial disengagement of the thrust piece, and eliminates the need for a separate disengagement prevention means. By combining these protective functions into a single component, the patent reduces overall device complexity while maintaining reliability
Solution Approach 2:
The securing ring serves multiple purposes simultaneously: it acts as a backward-rotation prevention means, an axial securing element for the thrust piece, and a structural connector between the actuating spindle and bridge. This multi-functionality eliminates the need for separate disengagement prevention components
2Adaptability or versatility
If the bellows is made from highly elastic material to cover the actuating spindle, then the bellows can accommodate the entire readjustment travel, but the bellows durability decreases under high temperatures
Solution Approach 1:
The sealing function is divided between two components: the bellows provides flexible coverage for the actuating spindle during readjustment travel, while a separate secondary seal (O-ring) provides high-temperature resistant sealing at the closure plate interface. This segmentation allows each component to be optimized for its specific function and temperature exposure
Solution Approach 2:
The secondary seal acts as an intermediary element between the bellows and the closure plate, providing a thermal barrier that protects the bellows from direct exposure to high temperatures generated during braking operations, thereby extending bellows service life
3Ease of repair
If the actuating spindle is rotated backward for bellows exchange, then the bellows can be replaced, but the readjustment device may be overloaded without a breakaway adapter
Solution Approach 1:
The backward rotation function is extracted from the readjustment device and implemented as a separate mechanical feature on the securing ring (backward-rotation prevention means). This allows the actuating spindle to be rotated backward for maintenance while the readjustment device itself is protected from overloading, as the securing ring's structural features control the rotation rather than relying on a breakaway mechanism
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 simplifies assembly and maintenance, reduces maintenance costs, and extends the service life of the disk brake by minimizing the impact of high temperatures on components, ensuring effective operation and reducing the need for frequent part replacement.
Implementation Method 1
For the restoring movement of the bridge after a braking action, a compression spring is arranged between the closure plate and the bridge
Implementation Method 2
a backward-rotation prevention means is realized by means of the securing ring provided according to the invention
Data Source
AI summary
A disk brake with lower cost and improved maintainability is provided. The brake caliper includes at least one actuating device for actuating the disc brake using a moveably guided bridge. The bridge has at least one threaded hole into which an actuating spindle is displaceably located. A brake disk end of the actuating spindle penetrates a caliper closing plate facing the brake disk. The positioning spindle carries a rotatably-mounted pressure piece which presses a brake pad against the brake disc. The opening is sealed by a bellows retained on the brake caliper on one side and on the pressure piece on the other side. A securing ring non-rotatably located on the actuating spindle and rotatably connected to the thrust piece interacts with the bellows during brake application and/or release to maintain a desired air gap between the brake disk and brake pad.