Vehicle Electric Braking Device Two-Axis Configuration Vibration Suppression
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Solution Overview
Problem
Existing vehicle electric braking devices face challenges in reducing axial dimensions to suppress vibration amplitudes caused by road surface irregularities and effectively arranging components sensitive to vibration, leading to increased reliability and reduced vibration amplification.
Innovation Solution
The vehicle electric braking device employs a two-axis configuration with the electric motor and brake piston having distinct axes, allowing for a reduced overall axial length and incorporating a speed reducer between these axes to enhance vibration suppression, while strategically arranging components to minimize the impact of road vibrations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the electric motor and brake piston are arranged in a one-axis configuration, then the device complexity is reduced, but the axial dimension increases leading to vibration amplification
Solution Approach 1:
The patent transitions from a one-axis configuration to a two-axis configuration, arranging the electric motor and brake piston along different axes. This dimensional change allows the components to be positioned more compactly in the axial direction while maintaining functional separation, thereby reducing the overall axial dimension without excessive simplification of the structural arrangement.
2Area of stationary object
If components are positioned farther from the support point, then the available space increases, but the vibration amplitude is amplified
Solution Approach 1:
The patent applies different positioning strategies to different components based on their sensitivity to vibration. The electric motor, being sensitive to vibration, is positioned closer to the support point to minimize vibration amplitude. Other components are positioned according to their specific requirements, creating a non-uniform distribution that optimizes both space utilization and vibration suppression for each component.
Solution Approach 2:
The patent introduces a vibration isolation mechanism as an intermediary between the support point and the components. This intermediary element decouples the vibration transmission path, allowing components to be positioned in available spaces without directly experiencing the full amplitude of vibrations from the support point, thus enabling better space utilization while protecting sensitive components.
3Reliability
If the axial dimension is reduced to suppress vibration, then the reliability increases, but the device complexity increases due to two-axis configuration
Solution Approach 1:
The patent employs a dynamic positioning strategy where the two-axis configuration allows independent optimization of each component's position relative to the support point. This dynamic arrangement enables the system to achieve better vibration suppression through strategic positioning while managing the increased complexity through modular design and clear functional separation between the motor axis and piston axis.
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 configuration effectively reduces the axial size of the braking device, suppresses vibration amplitudes, and enhances the reliability of the electric motor by strategically positioning components to mitigate the effects of road surface irregularities during vehicle travel.
Implementation Method 1
a shaft member (SFT) to be rotationally driven by the electric motor (MTR)
Implementation Method 2
a conversion member (NJB) configured to convert a rotational motion of the shaft member (SFT) into a translational motion of the friction member (MSB)
Implementation Method 3
presses a friction member (MSB) through/via an electric motor (MTR) against a rotation member (KTB), to thereby generate a braking torque
Data Source
AI summary
A mount member is fixed to a support member by first and second fastening members, and a caliper is mounted to the mount member by first and second guide members. A motor axis of an electric motor and an axis of a shaft member configured to press a pressing member are different from each other. The electric motor is fixed to the caliper. When viewed from an axial direction of the first guide member, the motor axis is positioned inside a fastening quadrangle having four corners corresponding to positions of respective axes of, and is perpendicular to the axis, and the motor axis is orthogonal to a plane of the fastening quadrangle. As a result, there may be provided a vehicle electric braking device in which an axial direction dimension may be reduced to suppress an amplitude caused by vibration, and components sensitive to vibration influence are appropriately arranged.