Motor Vehicle Door Lock With Two-Part Emergency Decoupling
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Solution Overview
Problem
Existing motor vehicle locks, particularly door locks, require complex designs and significant financial and design expenditures to implement multiple security positions and temporary crash redundancy, with no compact, cost-effective, and functionally reliable solutions available.
Innovation Solution
A two-part securing element with a securing lever and securing transmission lever, mechanically coupled and decoupled by a reversible drive worm, allows for efficient implementation of security positions and temporary crash redundancy using a single electric motor drive.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple separate electric motor drives are used to implement different security positions and emergency opening functions, then functional reliability and versatility are improved, but device complexity and manufacturing cost increase
Solution Approach 1:
The patent combines multiple drive functions into a single electric motor drive unit that can perform normal locking/unlocking, anti-theft positioning, and emergency opening functions through different operational modes and mechanical configurations, eliminating the need for separate motor drives for each function
Solution Approach 2:
The single electric motor drive is designed with universal capability to perform multiple functions: normal security positioning, anti-theft mode activation, and emergency opening, making one component serve multiple purposes that previously required separate dedicated drives
2Device complexity
If a single electric motor drive is used for all security functions, then device complexity and manufacturing cost are reduced, but functional reliability and emergency operation capability deteriorate
Solution Approach 1:
The securing element is divided into two independent parts: a securing lever and a securing transmission lever, allowing the emergency opening function to be mechanically separated from the electric motor drive, ensuring that emergency operation remains available even if the electric drive fails
Solution Approach 2:
The securing transmission lever acts as an intermediary mechanical element that can be actuated by the electric motor drive for normal operation or by manual intervention for emergency opening, providing a reliable backup path that does not depend on the electric drive's functionality
3Ease of manufacture
If the securing element is designed as a single integrated component, then manufacturing and assembly are simplified, but the ability to implement temporary crash redundancy and mechanical decoupling deteriorates
Solution Approach 1:
The securing element is segmented into two distinct levers that can be manufactured separately and assembled together, enabling the temporary crash redundancy function where the levers can be mechanically decoupled to allow emergency opening while maintaining normal security functions
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
Reduces design and financial effort while ensuring perfect functionality, enabling efficient transition between security positions and achieving emergency opening through mechanical decoupling during emergencies.
Implementation Method 1
the electric motor drive has a reversible drive worm. According to the invention, the drive worm is semicircular and equipped with two end-side cams
Data Source
Figure 1
Figure 2A
Figure 2B
AI summary
The present invention relates to a motor vehicle lock, and in particular a motor vehicle door lock, which is equipped with a locking mechanism consisting essentially of a rotary latch and a pawl. Furthermore, an electric motor drive (9, 10, 11) and a locking element (6, 8) interacting with the drive (9, 10, 11) are implemented. According to the invention, the locking element (6, 8) is designed in two parts, comprising a locking lever (6) and a locking transmission lever (8). Both levers (6, 8) are mechanically coupled to each other in a locking direction (S) to assume a locking position with the aid of the drive (9, 10, 11) and mechanically decoupled in the opposite direction (unlocking direction E).