Electronic Parking Lock Actuator Compact Integration
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Solution Overview
Problem
Existing parking lock actuators for automatic transmission vehicles are not compact enough due to separate design of the motor controller and lack of efficient space utilization, leading to increased space occupancy.
Innovation Solution
The electronic parking lock actuator integrates a driving motor, reduction transmission mechanism, output mechanism, and controller within a compact casing, with a gear lid isolating the controller from the output and reduction transmission mechanisms, and includes an emergency unlocking feature for manual operation in case of failure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the controller is designed separately and coupled to the motor via cable, then the controller can be independently controlled, but the space occupancy increases and compactness deteriorates
Solution Approach 1:
The controller is integrated directly into the motor assembly, eliminating the need for separate mounting and cable connections. The controller board is mounted within the motor housing, combining what were previously separate components into a single compact unit, thereby reducing overall space occupancy while maintaining independent control capability.
2Volume of moving object
If the controller is integrated into the motor assembly, then space occupancy is reduced, but the controller may be affected by mechanical interference from the transmission mechanism
Solution Approach 1:
The motor assembly is divided into distinct functional zones: the controller is mounted on the motor housing surface, separated from the internal transmission mechanism. This spatial segmentation allows the controller to be integrated into the compact assembly while protecting it from mechanical interference through physical separation and strategic placement away from moving parts.
3Ease of operation
If the emergency unlocking feature is exposed through the casing opening, then emergency unlocking is easily accessible, but the internal components may be exposed to external contaminants
Solution Approach 1:
A protective cover or seal is provided over the opening that houses the emergency unlocking feature. This intermediary element allows the emergency unlocking function to remain accessible while preventing direct exposure of internal components to external contaminants. The cover can be opened or manipulated for emergency access while maintaining protection during normal operation.
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 compact design improves reliability by isolating the controller and provides an emergency unlocking feature for convenient operation, addressing space efficiency and reliability issues in existing actuators.
Implementation Method 1
a driving motor configured to generate a driving force
Implementation Method 2
a reduction transmission mechanism connected between the driving motor and the output mechanism
Implementation Method 3
a worm formed on the driving shaft
Data Source
AI summary
An electronic parking lock actuator includes a driving motor configured to generate a driving force, an output mechanism including an emergency unlocking feature, a reduction transmission mechanism connected between the driving motor and the output mechanism to transfer a driving force generated by the driving motor to output mechanism, a control device electrically connected to the power mechanism for controlling the power mechanism, and a casing receiving all of the driving motor, the output mechanism, the reduction transmission, the controller therein. The casing defines an opening configured to expose the emergency unlocking feature.