Motor Vehicle Door Lock Parallel Housing Segmentation
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Solution Overview
Problem
Motor vehicle locks, particularly door locks, face challenges in maintaining the service life of electromotive drives due to exposure to varying environmental conditions, leading to unfavorable friction conditions and complex mechanical connections.
Innovation Solution
The motor vehicle lock design features a parallel orientation of the two housing parts, sealed at the edge, allowing for a simple mechanical connection between the electromotive drive and the locking mechanism, with the drive located in the dry chamber to prevent wear from environmental stresses.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the electromotive drive is arranged in the wet chamber housing part, then the mechanical connection between drive and locking mechanism is simplified, but the service life of the electromotive drive decreases due to exposure to dust and moisture
Solution Approach 1:
The housing is divided into two separate chamber housing parts: a wet chamber housing part containing the locking mechanism and a dry chamber housing part containing the electromotive drive. This segmentation allows each component to be positioned in its optimal environment, with the drive protected from environmental exposure while maintaining a simple mechanical connection through the sealing connection between chambers.
2Reliability
If the electromotive drive is arranged in the dry chamber housing part, then the service life of the electromotive drive is extended, but the mechanical connection between drive and locking mechanism becomes more complex
Solution Approach 1:
A sealing connection acts as an intermediary element between the dry and wet chamber housing parts. This sealing connection enables the transmission of actuating forces from the electromotive drive in the dry chamber to the locking mechanism in the wet chamber while maintaining environmental separation, thus avoiding complex mechanical connections.
3Ease of manufacture
If the housing parts are arranged in an L-shape configuration, then the mechanical connection between drive and locking mechanism is realized, but the overall housing becomes relatively complex
Solution Approach 1:
The two chamber housing parts are arranged asymmetrically in parallel to one another rather than in a traditional L-shape configuration. This asymmetric parallel arrangement simplifies the overall housing structure while enabling the sealing connection to effectively transmit actuating forces between chambers.
4Object-affected harmful factors
If the housing parts are sealed at the edge in parallel arrangement, then dust-tight and moisture-tight encapsulation is achieved, but the mechanical connection complexity increases
Solution Approach 1:
The sealing connection serves as a mediator that simultaneously achieves two functions: it provides dust-tight and moisture-tight encapsulation between the parallel housing parts while also enabling the transmission of actuating forces from the electromotive drive to the locking mechanism, thus avoiding additional mechanical complexity.
Data Source
AI summary
A motor vehicle lock, in particular a motor vehicle door lock, which is equipped with a locking mechanism consisting essentially of a rotary latch and a pawl. Furthermore, at least one electromotive drive is implemented. A control unit and an at least two-part housing having a wet chamber housing part and a dry chamber housing part are also implemented. The drive and the control unit are in each case arranged in the dry chamber housing part, and the locking mechanism is arranged in the wet housing part. According to the invention, both housing parts are arranged in parallel to each other and are sealingly connected to each other on the edge side.