Electromechanical Brake Piston Guide Member Design
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Electromechanical brakes face issues with maintaining stable braking performance due to disturbances and pad abrasion, leading to misalignment of axes and reduced control precision, efficiency, and maintainability.
Innovation Solution
An electromechanical brake design featuring a piston movable in an axial direction, a spindle thread-coupled to the piston for rotational force transmission, and a guide member integrated with the caliper housing to restrict piston rotation and guide axial movement, enhancing support and preventing bending, thus improving control and durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a protrusion is formed on the friction pad and a groove is provided in the piston to prevent rotation, then the piston cannot rotate during spindle rotation, but the structure becomes more complex and maintenance becomes difficult
Solution Approach 1:
The guide member is integrally formed with the caliper housing, merging two components into one. This eliminates the need for separate rotation prevention structures (protrusions and grooves) while achieving the same functional effect of preventing piston rotation and guiding axial movement.
Solution Approach 2:
The guide member serves multiple functions: it prevents piston rotation, guides axial movement of the piston, and provides structural support. This multi-functional design replaces the need for separate rotation prevention mechanisms, simplifying the overall structure.
2Ease of operation
If the piston is allowed to move freely during braking, then the braking operation is simpler, but misalignment occurs due to pad abrasion and disturbance, reducing control precision
Solution Approach 1:
The guide member provides localized guidance and constraint at the piston interface, allowing free movement in the axial direction while preventing rotation and lateral misalignment. This localized control maintains operational simplicity while ensuring precision.
Solution Approach 2:
Instead of allowing free movement and correcting misalignment through complex mechanisms, the invention inverts the approach by preventing misalignment at its source through the guide member's constraining geometry, thus maintaining simplicity while achieving precision.
3Stability of the object's composition
If the piston is constrained to prevent rotation using protrusion and groove structures, then rotation is prevented, but the structure requires more parts and reduces ease of manufacture
Solution Approach 1:
The guide member is integrally formed with the caliper housing in a single manufacturing process, eliminating the need for separate rotation prevention components. This reduces the number of parts and simplifies manufacturing while maintaining effective rotation control.
4Ease of manufacture
If the piston structure is simplified without rotation prevention mechanisms, then manufacturing is easier, but the piston may rotate during operation causing axis misalignment and reduced durability
Solution Approach 1:
The guide member integrates rotation prevention and axial guidance functions into the caliper housing structure itself, achieving reliable piston control without adding complex separate components, thus maintaining manufacturing simplicity while ensuring operational durability.
Solution Approach 2:
The guide member provides multiple protective functions simultaneously: preventing rotation, guiding axial movement, and supporting the piston structure, thereby enhancing reliability without significantly complicating the manufacturing process.
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 facilitates precise control, enhances response speed, reduces noise and vibration, improves durability, and simplifies maintenance by preventing pad protrusion, while maintaining uniform performance even under system changes.
Implementation Method 1
a spindle which is thread-coupled to the piston, and rotates by rotational force transmitted from the actuator so as to move the piston forward and backward in the axial direction
Implementation Method 2
a groove is formed in a surface of the piston which abuts on the friction pad, such that the rotation of the piston is prevented by increasing frictional force between the friction pad and the piston
Data Source
AI summary
An electromechanical brake includes a piston installed in a caliper housing so as to be movable forward and backward in an axial direction, and moves forward in the axial direction at the time of performing a braking operation so as to press a friction pad provided to clamp a disc; an actuator which provides rotational force for moving the piston; a spindle which is thread-coupled to the piston, and rotates by rotational force transmitted from the actuator to move the piston forward and backward in the axial direction; and a guide member which is provided to be integrally fixed to the caliper housing and coupled to the piston so as to restrict rotation of the piston and guide forward and backward axial movement of the piston, in which the guide member has a support portion which is coupled to the spindle and supports the spindle in the axial direction.