Disc Brake Piston Retraction Tool with Synchronized Pushing Plates
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Solution Overview
Problem
Existing tools for returning pistons into a disc brake caliber during lining replacement are inefficient, as they lack a synchronized mechanism to effectively retract pistons into the caliper assembly, leading to difficulties in safely replacing worn linings with new ones.
Innovation Solution
A piston-returning apparatus comprising a first and second pushing plate with threaded elements, a collar, and a rotating unit with restraining plates, movable plate, and rollers, which synchronizes the movement of the pushing plates relative to the collar, allowing for efficient retraction of pistons into the caliper by rotating the collar and handle mechanism.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a simple pushing tool is used to retract pistons, then the device complexity is reduced, but the productivity and precision of piston retraction are insufficient
Solution Approach 1:
The patent combines multiple pushing plates (first and second pushing plates) with a common collar and threaded elements into a single integrated tool assembly. This merging allows synchronized retraction of multiple pistons simultaneously, improving productivity while maintaining manageable complexity through functional integration.
Solution Approach 2:
The tool employs a rotating collar with threaded elements that convert rotational motion into linear pushing motion. This dynamic mechanism allows controlled, synchronized movement of pushing plates, enabling efficient and precise piston retraction without requiring overly complex independent control systems for each piston.
2Device complexity
If pistons are retracted without a synchronized mechanism, then the device complexity is reduced, but the manufacturing precision and reliability of lining replacement are compromised
Solution Approach 1:
The first and second pushing plates are merged through a common collar structure with threaded elements, ensuring that both pistons are retracted synchronously. This merging provides precise coordination without requiring complex independent control mechanisms for each piston.
Solution Approach 2:
The rotating collar with oppositely threaded elements converts single rotational input into synchronized linear motion of multiple pushing plates. This dynamic mechanism ensures precise synchronization of piston retraction while maintaining relatively simple device architecture.
3Productivity
If a complex synchronized mechanism is used to retract pistons, then the productivity and precision are improved, but the ease of operation is reduced
Solution Approach 1:
The mechanism uses a rotating collar that converts simple rotational input into coordinated linear motion of multiple pushing plates. This dynamic transformation allows the operator to control multiple pistons simultaneously through a single rotational action, maintaining ease of operation while achieving synchronized retraction.
Solution Approach 2:
Multiple pushing functions are merged into a single rotating collar assembly, allowing the operator to retract multiple pistons with one operational motion. This merging reduces the number of separate operations required, improving productivity without significantly increasing operational complexity.
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 apparatus enables precise and synchronized movement of pistons into the caliper, facilitating safe replacement of brake linings by allowing the pistons to be efficiently retracted and extended, thereby ensuring proper disc brake operation and safety during maintenance.
Implementation Method 1
a first pushing plate (1) comprising a first threaded element (13), a second pushing plate (2) extending parallel to the first pushing plate (1) and comprising a second threaded element (23), a collar (3) located between the first and second pushing plates (1, 2)
Data Source
AI summary
A piston-returning apparatus for a disc brake includes two pushing plates, a collar, a rotating unit and a handle. Each of the pushing plates includes a threaded element. The collar includes two screw holes for receiving the threaded elements of the pushing plates respectively so that the pushing plates are synchronously moved toward or away from the collar when the collar is rotated. The handle is connected to the collar via the rotating unit. The rotating unit is switchable between two modes. In the first mode, the rotating unit rotates the collar clockwise when the handle is pivoted clockwise but the rotating unit does not rotate the collar counterclockwise when the handle is pivoted counterclockwise. In the second mode, the rotating unit rotates the collar counterclockwise when the handle is pivoted counterclockwise but the rotating unit does not rotate the collar clockwise when the handle is pivoted clockwise.