Motor Driven Brake System Using Screw Push Rod
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Solution Overview
Problem
Conventional motor driven brake systems with parking brakes experience increased operating noise and safety issues due to power failures, which can lead to vehicle loss of control when the solenoid power is not supplied, causing the braking power to be unreleased during driving.
Innovation Solution
A motor driven brake system utilizing a compact motor, multiple disks, and friction pads to reduce solenoid operating noise and prevent power failure-induced braking power loss, featuring a compact motor that only receives power for parking brake engagement and release, and a screw-shaped push rod for forward-and-backward movement of the pressure member to restrict or release the rotating shaft.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a solenoid is used to control the parking brake in a motor driven brake system, then the parking brake can be engaged and released, but operating noise increases and safety risks arise due to power failures
Solution Approach 1:
The solenoid is completely removed from the motor driven brake system. Instead of using a solenoid to engage and release the parking brake, the system directly uses the motor to drive the push rod, which in turn engages or releases the parking brake. This extraction of the solenoid eliminates the source of operating noise and the associated safety risks from power failures.
Solution Approach 2:
The electromagnetic control mechanism (solenoid) is replaced with a direct mechanical drive mechanism using the motor. The motor's push rod directly actuates the parking brake components without intermediary electromagnetic actuators, thereby eliminating solenoid-related noise and improving reliability.
2Reliability
If a separate parking brake apparatus is added to the motor driven brake system, then parking braking power is provided when power is off, but system complexity and weight increase
Solution Approach 1:
The parking brake function is merged with the existing motor driven brake system components. The same motor, push rod, and friction pads are used for both service braking and parking brake functions. By combining these functions into a single integrated system, the patent eliminates the need for a separate parking brake apparatus, thereby reducing system complexity and weight while maintaining reliable parking brake functionality.
Solution Approach 2:
The motor driven brake system components are designed to serve multiple functions. The motor and push rod mechanism can operate in different modes to provide both service braking during driving and parking brake engagement when parked. This multi-functionality eliminates redundant components and simplifies the overall system architecture.
3Use of energy by moving object
If solenoid power is not supplied during driving, then power consumption is reduced, but braking power is not released causing vehicle loss of control
Solution Approach 1:
The motor driven brake system uses its own motor to both engage and release the parking brake, eliminating dependence on separate solenoid actuators. The motor can be controlled to reverse rotation and release the parking brake at any time, ensuring that braking power is always releasable on demand without risk of being locked due to power supply issues to auxiliary components.
Solution Approach 2:
The system incorporates control mechanisms that monitor the state of the parking brake and vehicle operation conditions. Based on this feedback, the controller appropriately activates or deactivates the motor to ensure the parking brake is engaged or released as needed, maintaining vehicle control safety while optimizing power consumption.
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 solution significantly reduces solenoid operating noise, eliminates the risk of vehicle control loss due to power failures, and enhances safety by allowing the braking system to function even with parking brake failures, while minimizing power consumption and system weight.
Implementation Method 1
a screw-shaped push rod, as a driving shaft of the compact motor, inserted into the screw aperture of the pressure member so as to perform a standing rotation for the purposed of the forward-and-backward movement of the pressure member
Implementation Method 2
friction pads 104 attached in a caliper housing 102, and a disk 106 disposed between the friction pads 104 so as to be pressed by the friction pads 104
Data Source
AI summary
A motor driven brake system including a parking brake, in particular, a motor driven parking brake system in which a parking brake is implemented using a compact motor and a plurality of disks and friction pads mutually fractionized or released by the compact motor, so that it is possible to reduce operating noise of a solenoid as compared with that of an existing solenoid and to prevent a phenomenon that although a power failure of the compact motor occurs during driving, the braking power of the motor driven brake system is not released.