Vehicle Door Pushing Device Using Nested Screw Mechanism
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Solution Overview
Problem
Existing vehicle door pushing devices are hindered by frozen weather seals, preventing the door from opening, and require a reduced size to accommodate around the window glass and its movement trajectory.
Innovation Solution
A vehicle door pushing device featuring a gear member, male screw member, and female screw member, where the gear member is rotatable by an actuator, and the female screw member moves between a first position within a casing and a second position partially protruding from the casing, allowing the door to be opened even when frozen.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the door pushing device is arranged at the upper portion of the door body portion to avoid interfering with the window glass, then the device can be integrated without interference, but the size of the door pushing device in the door width direction must be reduced
Solution Approach 1:
The female screw member is nested within the cup-shaped gear member, allowing the female screw member to be accommodated in the gear member when not in use. This nesting arrangement enables compact integration at the upper portion of the door body portion without increasing the device size in the door width direction, thus avoiding interference with the window glass while maintaining functionality.
2Device complexity
If a conventional door pushing device is used, then the device structure is simple, but the device cannot open the door when the weather seal is frozen
Solution Approach 1:
The door pushing device employs dynamic components including a rotatable gear member with a cup-shaped structure and a movable female screw member that can protrude from the casing. This dynamic structure allows the device to adapt to different operational conditions, including frozen weather seals, by enabling the female screw member to move and protrude when force is needed to open the door.
Solution Approach 2:
The male screw member acts as an intermediary element that transmits rotational motion from the gear member to linear motion of the female screw member. This intermediary mechanism converts the rotational power into linear pushing force, enabling the device to overcome frozen weather seals while maintaining a relatively simple overall structure.
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 device effectively opens the vehicle door even when the weather seal is frozen, and its compact design allows it to be easily integrated at the upper portion of the door body without interfering with the window glass.
Implementation Method 1
The male screw member is arranged coaxially with the gear member, and rotates integrally with the gear member. The female screw member is screwed onto the male screw member.
Implementation Method 2
The gear member is rotatable, by rotational power being output by an actuator, around an axis extending in a first direction substantially parallel to a vehicle width direction
Data Source
AI summary
A vehicle door pushing device in a vehicle door includes a gear member, a male screw member, and a female screw member. The gear member is rotatable by an actuator around an axis extending in a first direction substantially parallel to a vehicle width direction. The male screw member is coaxial with the gear member, and rotates integrally with the gear member. The female screw member is screwed onto the male screw member, and is movable along the first direction by rotation of the male screw member to each of a first position of being in a casing and a second position of at least partially protruding from the casing to a vehicle inner side. The gear member has a cup-shaped structure open at an end on the vehicle inner side in the first direction for being able to accommodate at least a part of the female screw member.