Electric Brake Piston Return Structure for Fast, Quiet Release
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Solution Overview
Problem
Existing electric brake devices face challenges in rapid restoration, noise reduction, and shock absorption when the brake is released due to the nut not being coupled to the piston, leading to inefficient piston return.
Innovation Solution
The electric brake device incorporates a return part mounted on the nut, with elastic return contact parts and friction increasing parts on the piston, allowing for rapid piston return and minimizing shock and noise by utilizing a nut calibration part and fixed ring components to guide and couple the return mechanism.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the nut is not coupled to the piston but only inserted, then the structure is simple and easy to assemble, but the piston cannot be rapidly restored when the brake is released
Solution Approach 1:
The return contact part is designed with elastic deformation capability, allowing it to dynamically adapt during piston movement. When the piston moves forward, the return contact part deforms; when the piston returns, it pushes the return contact part to engage with the nut, providing dynamic coupling only when needed for rapid restoration.
Solution Approach 2:
The return contact part acts as an intermediary element between the piston and the nut. It transfers the pushing force from the piston to the nut during the return stroke, enabling rapid piston restoration without requiring a permanent rigid coupling between the piston and nut.
2Object-affected harmful factors
If the nut is not coupled to the piston, then the assembly is simple, but shock and noise occur when the brake is released
Solution Approach 1:
The return contact part is pre-designed with elastic properties to absorb and cushion the impact when the piston returns. This beforehand cushioning prevents shock and noise by softening the impact through elastic deformation before the piston fully engages with the nut.
Solution Approach 2:
The return contact part changes its physical state from a relaxed position to an elastically deformed position during piston movement. This parameter change in elasticity allows it to absorb shock and reduce noise while maintaining the simplicity of the overall structure.
3Speed
If the return contact part is rigid, then the piston return is fast, but shock and noise increase
Solution Approach 1:
The return contact part utilizes elastic deformation as a key parameter change mechanism. It deforms elastically during piston movement to maintain fast return speed while simultaneously absorbing impact energy to reduce shock and noise, achieving both goals through controlled parameter change.
Solution Approach 2:
The return contact part is designed with composite structural characteristics, combining rigid support elements with elastic deformation elements. This composite approach allows it to provide both the rigidity needed for fast return and the elasticity needed to reduce shock and noise.
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 enables rapid piston return, reduces noise and shock, and maintains optimal operation performance by effectively coupling the return mechanism with the piston, ensuring efficient brake release.
Implementation Method 1
one or more return contact parts extending from the return fixed part, bent to have elasticity, and contacting an inside of the piston part
Implementation Method 2
one ore more friction increasing parts formed therein and configured to increase a friction force with the one ore more return contact parts
Data Source
AI summary
An electric brake device may include: a housing part; a driving part mounted on the housing part; a driving shaft part rotatable by the driving part; a nut part screwed to the driving shaft part, and linearly moveable through rotation of the driving shaft part; a piston part having the nut part inserted therein, and configured to move a pad through the nut part; and a return part mounted on the nut part, contacting the piston part, and configured to induce a return of the piston part.