Motor Vehicle Door Lock Gear Stage Transmission
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Solution Overview
Problem
Existing motor vehicle door locks face issues with non-uniform force transmission between the worm gear and pawl, leading to inconsistent engagement and potential mechanical failures during operation.
Innovation Solution
A gear stage transmission mechanism is introduced to securely and definably transmit drive forces from the worm gear to the pawl, ensuring consistent engagement and reliable operation by using a gear stage with positive-locking tooth engagement, allowing for precise control and efficient disengagement of the pawl from the rotary latch.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a direct connection between worm gear and pawl is used, then the structure is simpler, but the force transmission is non-uniform and unreliable
Solution Approach 1:
A gear stage transmission is introduced as an intermediary mechanism between the worm gear and the pawl. This gear stage ensures uniform and reliable force transmission by providing a controlled mechanical interface that maintains consistent engagement, resolving the issue of non-uniform force transmission while adding only minimal structural complexity.
2Reliability
If a gear stage transmission is introduced, then the force transmission becomes uniform and reliable, but the device complexity increases
Solution Approach 1:
The transmission mechanism is segmented into distinct functional components: the worm gear, the gear stage transmission, and the pawl. This segmentation allows each component to perform its specific function optimally while maintaining overall system reliability. The gear stage is designed as a compact module that provides uniform force transmission without excessive complexity.
3Strength
If the pawl is pre-tensioned by a spring, then the engagement is more secure, but the force transmission during operation becomes non-uniform
Solution Approach 1:
The gear stage transmission acts as a mediator between the pre-tensioned pawl and the driving forces from the worm gear. It ensures that the pre-tensioning force from the spring is balanced and uniformly distributed during operation, maintaining secure engagement while providing consistent force transmission throughout the operational cycle.
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 solution provides a safe, cost-effective, and structurally simple means for uniform force transmission, ensuring continuous engagement between the worm gear and pawl, enhancing the reliability and precision of the locking mechanism while preventing mechanical failures.
Implementation Method 1
A gear stage transmission mechanism is introduced to securely and definably transmit drive forces from the worm gear to the pawl, ensuring consistent engagement and reliable operation by using a gear stage with positive-locking tooth engagement
Implementation Method 2
A worm connected to the drive motor, a worm gear, wherein the worm gear can be driven by the drive motor and with the aid of the worm
Data Source
AI summary
A lock for a motor vehicle includes a locking mechanism with a rotary latch and at least one pawl, a drive motor, a worm connected to the drive motor, a worm gear, wherein the worm gear can be driven by the drive motor and with the aid of the worm, and a transmission stage for transmitting a torque from the worm gear to a pawl, wherein the transmission stage is a gear stage.