Electric braking device
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Solution Overview
Problem
In electric braking devices, the piston is pushed back when the electric motor loses power, leading to reduced durability due to impact when it reaches the end of its linear motion range, as existing technologies do not effectively mitigate this backstroke.
Innovation Solution
An electric braking device that uses a transmission mechanism to convert rotational motion from an electric motor into linear motion, with an actuator driven by the motor's generated power to decelerate the piston when power is lost, preventing vigorous backstroke and thus reducing component wear.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the electric motor loses power during braking force generation, then the piston is pushed back by external force, but the impact when the piston runs into the end of the linear motion range decreases component durability
Solution Approach 1:
The patent converts the harmful backstroke motion into a beneficial energy generation process. When the piston moves in the decreasing direction due to external force, the electric motor rotates in the braking force decreasing direction and generates electric power. This generated power is then used to drive the actuator, which applies resistance to the piston movement, thereby converting the harmful impact motion into useful electrical energy that helps control the piston deceleration.
Solution Approach 2:
The system uses its own components to solve the problem. The electric motor, which is already part of the braking system, serves a dual function: it not only generates braking force during normal operation but also generates electric power during the backstroke to drive the actuator. This self-service mechanism eliminates the need for external power sources or additional complex control systems to mitigate the piston impact.
2Reliability
If the piston moves vigorously in the decreasing direction when power is lost, then the braking force decreases, but the impact increases component wear
Solution Approach 1:
The system implements a feedback control mechanism where the actuator, driven by electric power generated from the piston's own motion, applies resistance to the piston movement. This creates a feedback loop where the piston's decreasing motion generates power that is used to control and decelerate the piston, preventing excessive speed and reducing impact on components.
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 effectively decelerates the piston's backstroke, mitigating impact and maintaining component durability by utilizing the electric motor's power to control the piston's movement, even when power is interrupted.
Implementation Method 1
the electric motor rotates in the braking force decreasing direction, which is a direction opposite to the braking force increasing direction, by the piston moving in the decreasing direction that is a direction in which the braking force decreases by an external force
Implementation Method 2
the actuator is driven by the electric power generated by the electric motor, thereby decelerating the moving speed of the piston in the decreasing direction
Data Source
AI summary
An electric braking device includes an actuator that, in a case in which an electric motor rotates in a second rotational direction due to a piston moving in a second direction which is the direction in which braking force decreases due to an external force, is driven to inhibit the piston from moving in the second direction by using electric power generated by the electric motor as the electric motor rotates in the second rotational direction.