Lead Screw Vehicle Door Actuation for Controlled Opening and Closure
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Solution Overview
Problem
Existing vehicle door opening and closing mechanisms require significant passenger effort, leading to increased risk of injury and diminished consumer experience due to sudden door movements caused by road slopes, wind, or door weight.
Innovation Solution
A door opening and closing apparatus featuring a lead screw hinge and an opening and closing module with a planetary gear reduction module, driven by a brushless DC motor, allowing automatic door operation with a magnet brake for controlled closure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a passenger directly pushes or pulls the door to open or close it, then the door operation is simple and direct, but significant passenger effort is required which increases the risk of injury and diminishes consumer experience
Solution Approach 1:
The patent replaces the direct mechanical pushing/pulling action with an automated door opening and closing apparatus that uses a lead screw mechanism and opening/closing module to automatically move the door, eliminating the need for passenger effort and associated injury risks
Solution Approach 2:
The door system performs self-service by automatically opening and closing without requiring passenger intervention, with the apparatus detecting and responding to door status changes autonomously
2Device complexity
If the door is operated manually by pushing or pulling, then the mechanism is simple, but the door may suddenly open or close due to strong wind or its own weight causing unintended movements
Solution Approach 1:
The apparatus incorporates feedback mechanisms that detect door position and external forces, allowing the system to respond to wind or weight-induced movements by activating the opening/closing module to maintain desired door position and prevent unintended opening or closing
Solution Approach 2:
The system applies preliminary counteracting forces through the lead screw and opening/closing module to prevent wind or gravity from causing unintended door movement, especially when the door is held in intermediate positions
3Ease of operation
If a lead screw and opening/closing module are used to enable automatic door operation, then passenger effort is eliminated and safety is improved, but the device complexity increases
Solution Approach 1:
The lead screw mechanism serves multiple functions: it provides mechanical advantage for easy door movement, enables precise position control, and works with the opening/closing module to achieve both automatic operation and safety features, justifying the increased complexity through multi-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
Enables convenient, compact, and safe door operation without passenger effort, preventing unintended closure and enhancing safety and convenience.
Implementation Method 1
a lead screw hinge-coupled to one of a door or a body of the vehicle; and an opening and closing module coupled to the other of the door or the body, the opening and closing module being arranged such that the lead screw passes through a center of the opening and closing module, and configured to move to a first side of the lead screw to close the door or to a second side of the lead screw to open the door
Implementation Method 2
a planetary gear reduction module configured to transmit the rotation of the drive module at a preset reduction ratio
Implementation Method 3
A door opening and closing apparatus for a vehicle may include a lead screw hinge-coupled to one of a door or a body of the vehicle; and an opening and closing module coupled to the other of the door or the body... driven by a brushless DC motor, allowing automatic door operation with a magnet brake for controlled closure
Data Source
AI summary
A door opening and closing apparatus for a vehicle includes a lead screw hinge-coupled to one of a door or a body of the vehicle; and an opening and closing module coupled to the other thereof, the opening and closing module being arranged such that the lead screw passes through a center of the opening and closing module, and configured to move to a first side of the lead screw to close the door or to a second side of the lead screw to open the door. The opening and closing module includes a drive module configured to provide a rotation that is converted to linear reciprocation of the opening and closing module relative to the lead screw; and a planetary gear reduction module configured to transmit the rotation of the drive module at a preset gear reduction ratio.