Compact Flap Drive With Nested Spindle Rotor Sealing
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Solution Overview
Problem
Existing flap drives require large installation spaces, particularly in vehicles with limited space such as side doors, where they must also meet high demands for visual appearance, acoustic noticeability, and environmental sealing.
Innovation Solution
The spindle drive is arranged inside a rotor, with the motor driving the rotor in a rotationally fixed manner to connect to the threaded spindle, reducing the overall housing size and improving sealing by encapsulating the thrust tube within the rotor.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the spindle drive is arranged outside the rotor, then the housing requires larger dimensions to accommodate all components, but the installation space requirement increases
Solution Approach 1:
The spindle drive is arranged inside the rotor, which rotates within the housing. This nested arrangement allows the spindle drive components to be contained within the rotor volume, effectively reducing the overall housing dimensions and installation space requirement while maintaining all necessary functional components
2Ease of operation
If the thrust tube is exposed outside the rotor, then access is easier, but the sealing from environmental influences deteriorates
Solution Approach 1:
The thrust tube is moved inside the rotor, which rotates within the sealed housing. This nesting arrangement allows the thrust tube to be accessible through the rotating rotor structure while maintaining water-tight sealing between the rotor and housing, protecting internal components from environmental influences
3Area of stationary object
If the housing dimensions are reduced to save installation space, then the installation space requirement decreases, but the space for motor and gear stage arrangement becomes limited
Solution Approach 1:
The motor and gear stages are arranged inside the housing with the rotor nested within. This compact nested arrangement allows efficient use of internal volume, accommodating motor, gear stages, and spindle drive components within reduced housing dimensions without excessive complexity
Solution Approach 2:
The drive system utilizes the rotational dimension of the rotor to accommodate the spindle drive, transforming a linear space arrangement into a rotational volume utilization, thereby reducing the footprint in stationary dimensions while maintaining component functionality
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
This design reduces the installation space required for the drive while maintaining effective sealing and operational reliability, even in constrained environments like side doors.
Implementation Method 1
a motor (3) and a spindle drive (4), wherein the motor (3) and the spindle drive (4) are drivingly connected to one another
Implementation Method 2
the spindle drive has a threaded spindle (14) with a nut (15) and a thrust tube (16)
Data Source
AI summary
A drive for a flap, wherein the drive has a housing, a motor and a spindle drive, wherein the motor and the spindle drive are drivingly connected to one another and make a motorized adjustment of the flap possible, wherein the drive moves the flap at least into an open position and a closed position, wherein the spindle drive has a threaded spindle with a nut and a thrust tube and the thrust tube is connected to the threaded spindle via the nut, wherein the thrust tube is moved via a translational movement, wherein the spindle drive is arranged inside a rotor and the motor drives the rotor, wherein the rotor is connected to the threaded spindle.