Integrated Motor Sealing Guide for EPB Terminal Support
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Solution Overview
Problem
Existing electronic parking brake systems face challenges in reducing size and weight due to separate components like vacuum boosters, ESC systems, and vacuum pumps, and they are not suitable for hybrid or electric vehicles without engine vacuum.
Innovation Solution
A motor design with a rotating shaft, rotor, stator, and integrated housing that includes a sealing guide with a grommet and sealing cap to support the terminal, minimizing assembly failures and weight, and integrates a gear for reduced size and weight, eliminating the need for a vacuum pump.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate components (vacuum booster, ESC system, vacuum pump) are used to form the EPB system, then the system can provide complete braking and stability control functions, but the size and weight of the system increase
Solution Approach 1:
The patent combines the motor, ESC system, and vacuum pump functions into an integrated motor unit. The motor housing incorporates the ESC system and vacuum pump within the same structural envelope, eliminating the need for separate mounting spaces and reducing overall system weight while maintaining all required braking and stability control functions
Solution Approach 2:
The motor unit is designed to perform multiple functions simultaneously: providing braking force through the motor, enabling electronic stability control through the integrated ESC system, and generating vacuum through the built-in vacuum pump. This multi-functional design allows a single component to replace what would traditionally require three separate systems
2Reliability
If separate components (vacuum booster, ESC system, vacuum pump) are used to form the EPB system, then the system can provide complete braking and stability control functions, but the size of the system increases
Solution Approach 1:
The patent integrates the ESC system and vacuum pump within the motor housing structure, allowing these components to share the same spatial envelope. This merging approach reduces the total footprint of the system by eliminating gaps and mounting spaces that would be required if the components were installed separately
Solution Approach 2:
The design places the ESC system and vacuum pump inside or adjacent to the motor housing, creating a nested arrangement where smaller components are housed within the structural boundaries of the larger motor assembly. This nesting strategy maximizes space utilization and minimizes the overall system area
3Weight of stationary object
If engine vacuum is used in hybrid or electric vehicles, then the vacuum pump can be eliminated, but hybrid or electric vehicles do not have engine vacuum available
Solution Approach 1:
The integrated motor unit is designed to function across different vehicle types (conventional ICE, hybrid, and electric vehicles) by incorporating an electric vacuum pump that can generate vacuum independently of engine operation. This universal design allows the same system to adapt to vehicles that may or may not have engine vacuum available
Solution Approach 2:
The system replaces the mechanical engine-driven vacuum system with an electric vacuum pump that can operate independently of engine operation. This substitution allows the vacuum generation function to work in hybrid and electric vehicles where no engine vacuum is available, while maintaining compatibility with conventional vehicles
4Ease of manufacture
If the terminal is exposed at the outside of the housing, then electrical connection is simplified, but the terminal is susceptible to twisting and assembly failure
Solution Approach 1:
The grommet is installed in advance within the housing opening to provide protective support for the terminal before final assembly. This pre-installed protective element prevents twisting and damage during the assembly process, ensuring reliable terminal connection while maintaining ease of electrical connection
5Device complexity
If the sealing guide is not provided, then the housing opening is exposed, but the terminal lacks support and assembly failures increase
Solution Approach 1:
The sealing guide is designed as a separate, modular component that can be independently manufactured and installed in the housing opening. This segmentation allows the terminal support function to be added without redesigning the entire housing structure, maintaining structural simplicity while improving assembly reliability
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 motor design achieves reduced size and weight, minimizes assembly failures, and allows for efficient braking in vehicles without vacuum pumps, enhancing the electronic stability control system and fuel efficiency.
Implementation Method 1
the sealing guide supports a terminal of the stator exposed at an outside of the housing
Implementation Method 2
a sealing cap disposed to cover an opening formed in an upper side of the housing
Implementation Method 3
a motor including a rotating shaft, a rotor including a hole in which the rotating shaft is disposed, a stator disposed at an outer side of the rotor
Data Source
AI summary
The present invention provides a motor including: a rotating shaft; a rotor including a hole in which the rotating shaft is disposed; a stator disposed at an outside of the rotor; a housing configured to accommodate the rotor and the stator; and a sealing guide disposed to cover an opening formed in one side of the housing, wherein the sealing guide supports a terminal of the stator exposed at an outside of the housing.