Vehicle Brake Caliper Housing Layout for Thermal Isolation
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Solution Overview
Problem
Existing vehicle brake devices face challenges in ensuring heat dissipation from components while suppressing heat transfer between components, particularly due to the close proximity of the speed reducer, electric motor, and linear motion converter within the same housing.
Innovation Solution
The vehicle brake device incorporates an electric motor, a speed reducer, a linear motion converter, an electronic circuit, a caliper-side speed reducer housing, and a motor-side speed reducer housing, where the thermal conductivity of the caliper-side speed reducer housing is lower than that of the motor-side speed reducer housing, effectively suppressing heat transfer between components while ensuring heat dissipation from the electric motor and electronic circuit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If components are housed in close proximity within the same housing, then device compactness is improved, but heat transfer between components increases
Solution Approach 1:
The patent applies local quality by assigning different thermal conductivity properties to different parts of the housing. The first housing portion (accommodating the motor) has higher thermal conductivity for heat dissipation, while the second housing portion (accommodating the speed reducer) has lower thermal conductivity to isolate heat. This localized differentiation allows the housing to simultaneously achieve compact integration and thermal management.
2Temperature
If high thermal conductivity housing material is used, then heat dissipation from electric motor is improved, but heat transfer from pad and disk to speed reducer increases
Solution Approach 1:
The housing is segmented into at least two distinct portions with different thermal conductivity characteristics. The first housing portion (motor housing) uses material with higher thermal conductivity to facilitate heat dissipation from the electric motor. The second housing portion (speed reducer housing) uses material with lower thermal conductivity to prevent heat transfer from the brake assembly. This segmentation allows each component to operate in its optimal thermal environment.
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 suppresses the transmission of frictional heat from the pad and disk to the speed reducer, electric motor, and electronic circuit, thereby reducing the temperature rise of these components during operation and ensuring efficient heat dissipation.
Implementation Method 1
The thermal conductivity of the caliper-side speed reducer housing is lower than the thermal conductivity of the motor-side speed reducer housing
Implementation Method 2
The thermal conductivity of the caliper-side speed reducer housing is lower than the thermal conductivity of the motor-side speed reducer housing
Data Source
AI summary
A linear motion converter is held by a caliper that holds a pad, and is capable of converting a rotation from the speed reducer into a linear motion and pressing the pad against a disk. An electronic circuit controls a rotation of an electric motor. A caliper-side speed reducer housing is provided to accommodate a portion of the speed reducer and to be connected to the caliper. A motor-side speed reducer housing is provided to accommodate a portion of the speed reducer and to be connected to the caliper-side speed reducer housing. The electric motor is provided on the caliper-side speed reducer housing side with respect to the motor-side speed reducer housing. The electronic circuit is provided on the opposite side of the motor-side speed reducer housing to the caliper-side speed reducer housing. A thermal conductivity of the caliper-side speed reducer housing is lower than the motor-side speed reducer housing.