Electric Brake Actuator Mount Near Center of Gravity
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Solution Overview
Problem
Conventional electric servo units for vehicle brake systems are large, lack versatility, and suffer from increased weight and vibration-induced displacement, leading to stress on connection parts and poor attachability.
Innovation Solution
A vehicle body attachment structure for an electric brake actuator with a mount portion positioned near the center of gravity, separate from the cylinder mechanism, and a load transmission section to reduce displacement and stress, featuring a driving force transmission section with a motor attachment portion and a connector arrangement for improved accessibility and versatility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the electric brake actuator is attached to a portion with low strength, then the attachability is improved, but the unit experiences large displacement and vibration under force
Solution Approach 1:
The patent divides the attachment function into two separate portions: a first attachment portion for securing the actuator body and a second attachment portion for supporting the cylinder mechanism. This segmentation allows each portion to be optimized independently - the first portion can be placed on lighter vehicle body portions for ease of attachment, while the second portion provides additional support to reduce displacement and vibration.
2Device complexity
If the mount portion is integrated with the cylinder mechanism, then the structure is simplified, but the versatility is reduced due to mass-production constraints
Solution Approach 1:
The patent separates the mount portion from the cylinder mechanism, making them independent components. The first attachment portion is provided on the actuator body while the second attachment portion is provided on the vehicle body, allowing them to be designed and manufactured independently. This enables the same actuator to be adapted to different vehicle types and configurations without redesigning the entire assembly.
3Strength
If reinforcement is added to strengthen the attachment portion, then the strength is improved, but the total weight increases
Solution Approach 1:
By dividing the attachment into two portions, the patent distributes the load-bearing requirements across different locations. The first attachment portion handles the primary mounting function while the second attachment portion provides additional support, allowing each portion to be minimized in weight while collectively providing sufficient strength.
4Adaptability or versatility
If the electric servo unit is made large to accommodate both hydraulic pressure generation mechanisms, then the functionality is complete, but the displacement under vibration force increases
Solution Approach 1:
The patent separates the actuator into distinct functional sections: the actuator mechanism (electric motor and transmission) and the cylinder mechanism (hydraulic pressure generation). By providing separate attachment portions for each section, the patent allows them to be positioned optimally to minimize vibration displacement while maintaining complete functionality.
Data Source
AI summary
A structure for attaching a motor cylinder device to the body of the vehicle, said vehicle brake system including: an input device via which an operator inputs brake operations; and a motor cylinder device that generates hydraulic brake pressure on the basis of electrical signals based on said brake operations. Said motor cylinder device has: an electric motor that operates on the basis of electrical signals; a driving-force transmission unit that transmits driving force from the electric motor; and a cylinder mechanism that applies pressure to a brake fluid by moving a piston axially by means of the driving force transmitted by the driving-force transmission unit. A mount for attaching the motor cylinder device to the body of the vehicle is provided near the center of gravity of the motor cylinder device. This makes it possible to minimize displacement of the electric brake actuator when subjected to vibration.