Pivotable Sliding Vehicle Door Drive System
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Solution Overview
Problem
The limited space available for the drive device in pivoting sliding doors of vehicles poses challenges in arranging the motor to transmit driving force and reaction force efficiently, especially when using toothed or cam belt drives.
Innovation Solution
A compact drive system is achieved by connecting a planetary geared motor and a bevel gear in series, allowing the reaction force from the motor housing to be utilized and torque to be generated for door leaf movement via a belt drive, with the planetary gear motor's housing oriented parallel to the belt drive.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If a planetary geared motor is used with limited installation space, then the drive device becomes compact, but it becomes difficult to arrange the motor to transmit driving force and reaction force efficiently
Solution Approach 1:
The patent combines the planetary geared motor and bevel gear into a single integrated drive unit. The motor housing serves dual purposes: providing structural support and acting as the reaction force bearing surface. This merging eliminates the need for separate mounting structures and simplifies the force transmission path, resolving the contradiction between compactness and ease of force transmission arrangement.
Solution Approach 2:
The motor housing is designed to perform multiple functions simultaneously: it contains the planetary gears, provides the reaction force bearing surface, and serves as the mounting structure for the bevel gear. This multi-functionality allows efficient force transmission within limited space, as the same structural element serves both spatial and mechanical force transmission requirements.
2Power
If the motor housing is rotatably mounted to utilize reaction force, then force transmission efficiency improves, but the device complexity increases
Solution Approach 1:
The reaction force bearing surface is integrated directly into the motor housing structure rather than being a separate component. The housing itself is designed to rotate on the mounting axis, combining the bearing function with the structural housing, thereby improving force transmission without adding device complexity.
3Productivity
If transmission ratios are optimized for both driving force and reaction force, then operational efficiency improves, but the drive device requires more space
Solution Approach 1:
The bevel gear is positioned within or adjacent to the planetary gear assembly, with the motor housing serving as the common mounting structure for both gear systems. This nested arrangement allows both transmission stages to occupy overlapping or adjacent spaces, enabling optimized transmission ratios for both driving and reaction forces without proportionally increasing the overall drive device volume.
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 configuration enables flexible selection of transmission ratios for driving and reaction forces, ensuring efficient operation even under unfavorable installation conditions.
Implementation Method 1
planetary geared motor
Implementation Method 2
bevel gear
Data Source
Figure 1~2
Figure 3~4
Figure 5
AI summary
The door has a door leaf (1.1) adjusted in a longitudinal direction, and a driving device for the shifting movement of the leaf. A supporting guide is connected with a frame part, and a planetary gear motor (9) serves as the drive device. An output shaft (9.2) of the motor is connected with an input unit of an angular gear (10). An output unit of the gear is coupled with drive and counter rollers (11.1, 11.2) and with gear or cam belt (11.3) for adjustment of the leaf, when the housing (9.1) of the motor is rotatably connected with the housing of the gear around an axis of the shaft.