Vehicle Flap Spindle Drive Assembly With Interlocking Motor Mount
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Solution Overview
Problem
Existing spindle drive assemblies for vehicle flaps face a conflict between reliability and cost-effectiveness, as reliable designs are often complex and costly to manufacture, while cost-effective designs may not be as reliable.
Innovation Solution
A spindle drive assembly with a rotationally fixed spindle drive motor supported by an interlocking fit, featuring a housing cap laser welded to the housing body, and damping elements to decouple vibrations, allowing for simple and cost-effective manufacturing while ensuring reliability and noise reduction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a spindle drive assembly is designed to be reliable with robust mounting of the spindle drive motor, then the reliability improves, but the device complexity and manufacturing cost increase
Solution Approach 1:
The housing cap serves multiple functions simultaneously: it closes the housing, provides mounting surfaces for the spindle drive motor, and incorporates interlocking elements directly into its structure. This integration of functions into a single component reduces the number of separate parts and simplifies the overall device while maintaining reliable motor mounting
Solution Approach 2:
The housing cap is designed as a multi-functional component that combines structural closure, motor support, and rotational constraint functions. By making the housing cap universal for multiple purposes, the design avoids adding separate components for each function, thereby reducing complexity while ensuring reliable motor fixation
2Reliability
If an interlocking fit is used to support the spindle drive motor, then the reliability and service life improve, but the manufacturing precision requirements increase
Solution Approach 1:
The interlocking elements are integrated directly into the housing cap structure rather than being separate components. This merging of the interlocking mechanism into the existing housing cap reduces the number of additional parts and simplifies manufacturing, while still providing reliable rotational support for the motor shaft
3Object-generated harmful factors
If damping elements are added to decouple vibrations, then the noise and vibration reduce, but the device complexity and manufacturing cost increase
Solution Approach 1:
The damping elements are integrated into the housing cap structure rather than being separate components. This merging approach allows vibration decoupling functionality to be incorporated into an existing component, reducing overall device complexity while still achieving noise and vibration reduction
Solution Approach 2:
The damping elements act as intermediary components between the spindle drive motor and the housing cap, absorbing vibrations and preventing their transmission to the housing. This intermediary function reduces noise and vibration without requiring complex isolation systems
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
The solution enables the production of a spindle drive assembly that is both cost-effective and reliable, with a long service life, reduced noise, and minimal vibrations, perceived as high quality and operationally effective.
Implementation Method 1
a spindle drive motor which is arranged in the spindle drive assembly housing and the motor shaft of which is arranged substantially coaxially with the spindle drive axis is supported in the spindle drive assembly housing in a rotationally fixed manner in relation to the spindle drive axis by means of an interlocking fit
Implementation Method 2
the spindle drive motor is supported in the spindle drive assembly housing by means of at least one damping element. Vibrations emanating from the spindle drive motor can thus be effectively damped before they are introduced into the spindle drive assembly housing
Implementation Method 3
the housing cap is laser welded to the housing body
Data Source
AI summary
A spindle drive assembly for opening or closing a vehicle flap, having a spindle drive assembly housing extending along a spindle drive axis and a spindle drive motor arranged in the spindle drive assembly housing. The motor shaft of the spindle drive motor is arranged substantially coaxially with the spindle drive axis. Furthermore, the spindle drive motor is supported in the spindle drive assembly housing in a rotationally fixed manner in relation to the spindle drive axis by an interlocking fit. In addition, a vehicle flap with such a spindle drive assembly.