Motor Vehicle Window Winder Plug Contact Dynamics
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Solution Overview
Problem
Existing adjustment drives for motor vehicles, particularly those with worm gear mechanisms and electric motors, face challenges in reliable and simple assembly of plug contacts, which can lead to contact corrosion and mechanical instability during operation.
Innovation Solution
The adjustment drive incorporates a sliding bearing design for the plug contact, allowing it to move and maintain electrical contact with the mating contact, even under vibrations, using a blade or forked contact system with stop elements and recesses to prevent relative movement and corrosion, thus ensuring secure and cost-effective assembly and operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the plug contact is rigidly fixed in the electric motor, then mechanical stability is improved, but contact corrosion and mechanical instability occur during operation due to vibrations
Solution Approach 1:
The plug contact is designed with dynamic mounting on the motor shaft, allowing it to move axially relative to the motor shaft. This dynamic configuration enables the plug contact to compensate for vibrations and relative movements between the electric motor and gear mechanism housing, preventing contact corrosion while maintaining reliable electrical contact during operation
2Reliability
If the plug contact is made movable to compensate for vibrations, then contact reliability is improved, but assembly complexity increases
Solution Approach 1:
The plug contact is designed to perform its own positioning and alignment functions through its dynamic mounting configuration. The contact automatically adjusts its position to maintain reliable electrical connection, eliminating the need for complex external positioning mechanisms or precise manual adjustment during assembly
3Ease of manufacture
If conventional fixed plug contacts are used, then assembly is simple, but thermal loading increases and fault arcs may occur
Solution Approach 1:
The dynamic mounting of the plug contact allows it to maintain optimal electrical contact under varying operational conditions, including thermal expansion and vibration. This prevents poor contact that would lead to increased electrical resistance, excessive thermal loading, and potential fault arcs, while still maintaining relatively simple assembly procedures
Data Source
AI summary
An adjustment drive, in particular a window winder drive of a motor vehicle. The adjustment drive has an electric motor with a brush system, the respective brush of the brush system being connected to a plug contact in order to supply power to the electric motor, and an electronics system housing in which a mating contact, with which the plug contact makes contact, is arranged. In this case, the plug contact is mounted such that it can move in the plug-contact-making direction.