Exterior Mirror Adjusting Drive With Selective Motor Coupling
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Solution Overview
Problem
Conventional adjusting instruments for exterior vision elements in motor vehicles require two heavy electric motors for adjusting the vision unit about standing and lying axes, leading to increased costs and complexity in power supply management.
Innovation Solution
A drive mechanism with a first heavy electric motor and a second light electric motor, where the coupling mechanism allows selective coupling between the motors and the elements to be driven, enabling one heavy motor to handle both axes and the light motor to manage the coupling, reducing overall power requirements and costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If two heavy electric motors are used to adjust the vision unit about standing and lying axes, then the adjustment capability is ensured, but the cost and power supply complexity increase
Solution Approach 1:
The first electric motor is designed to perform multiple functions by sequentially driving both the standing axis adjustment and the lying axis adjustment through the coupling mechanism. This multi-functional design eliminates the need for two separate heavy motors, reducing power supply complexity while maintaining full adjustment capability.
Solution Approach 2:
The coupling mechanism dynamically switches the connection between the first electric motor and the two elements to be driven, allowing the motor to alternate between driving the standing axis and the lying axis. This dynamic switching enables one motor to replace two motors, simplifying the power supply system.
2Reliability
If two heavy electric motors are used for adjustment, then the adjustment performance is maintained, but the cost increases
Solution Approach 1:
The first electric motor serves dual purposes by adjusting both the standing and lying axes, eliminating the need to manufacture and install two separate heavy motors. This reduces material costs, assembly complexity, and overall manufacturing expenses while preserving complete adjustment functionality.
Solution Approach 2:
The functions of two separate motors are merged into a single motor system with a coupling mechanism that enables sequential operation. This consolidation reduces the total cost of motor components, control systems, and installation while maintaining the same adjustment performance.
3Ease of manufacture
If a standard door module is used for power supply, then the power supply capability is limited, but the cost is reduced
Solution Approach 1:
The first electric motor operates in periodic cycles, alternating between driving the standing axis adjustment and the lying axis adjustment. This periodic operation allows a standard door module with limited continuous power capacity to supply the required peak power intermittently, reducing costs while maintaining adequate power supply capability for the adjustment functions.
Data Source
AI summary
Provided is a drive, in particular for an adjusting instrument for an exterior vision element for a motor vehicle, comprising a driving mechanism cooperating with a first electric motor. The driving mechanism is configured for, by energization of the first electric motor, driving respectively a first and a second element to be driven. The driving mechanism comprises a coupling mechanism cooperating with a second electric motor. The coupling mechanism is configured for, by energization of the second electric motor, selectively coupling the driving mechanism with respectively the first and the second element to be driven.