Irregular-Circular Vehicle Door Arc Guide Rail Mechanism
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Solution Overview
Problem
Conventional vehicle door designs with sliding glass mechanisms are inadequate for recreational vehicles with irregular-circular frames, as they cannot accommodate a large enough glass and have insufficient space for a glass lifting mechanism due to the shape and thickness of the door.
Innovation Solution
A vehicle door with an irregular-circular frame featuring a fixed glass, a movable glass, and an arc-shaped guide rail, where the movable glass is mounted via a shaft sleeve and shaft, and a lock member with a lock pin and stop blocks to adjust the opening degree, allowing smooth operation within the limited space.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of moving object
If a conventional sliding glass mechanism is used in a vehicle door with an irregular-circular frame, then the door structure can be simple, but the glass cannot be large enough and the lifting mechanism cannot be arranged due to insufficient space
Solution Approach 1:
Instead of sliding the glass vertically along the door height, the patent inverts the movement direction by using an arc-shaped guide rail that allows the glass to move along a curved path centered on the door's circular frame. This inversion enables the glass to achieve a larger effective area while the lifting mechanism can be compactly arranged within the limited space of the irregular-circular door structure.
Solution Approach 2:
The patent applies curvature by designing the guide rail with an arc shape that matches the irregular-circular frame of the door. This curved geometry allows the glass to move along a path that充分利用 the door's circular space, enabling both a larger glass area and a compact lifting mechanism arrangement that would be impossible with straight linear guides in the same space-constrained environment.
2Device complexity
If the glass is slid upwardly and downwardly along a sliding rail, then the mechanism is simple, but there is not enough space between the inner and outer plates of the lower half part of the vehicle door to receive the glass
Solution Approach 1:
The patent transitions from one-dimensional vertical sliding to two-dimensional curved movement by implementing an arc-shaped guide rail. This dimensional change allows the glass to move along a curved path that utilizes the radial space of the circular door frame, enabling the glass to be received in the limited space between inner and outer plates while maintaining a relatively simple mechanism structure.
Solution Approach 2:
Instead of moving the glass vertically along the door height direction, the patent inverts the movement approach by using a pivot point and arc-shaped rail that allows the glass to swing along a curved path. This inverted movement strategy enables the glass to be accommodated in the limited space between door plates while keeping the mechanism simple and compact.
3Shape
If a straight edge is obliquely disposed between the upper half part and lower half part of the vehicle door, then the door has an irregular-circular shape, but the space between inner and outer plates in the lower half part becomes very small
Solution Approach 1:
The patent embraces the irregular-circular shape of the door by designing the guide rail with an arc profile that matches the door's curvature. This curved guide rail allows the glass to move along a path that充分利用 the radial space created by the oblique straight edge, transforming the spatial constraint into a functional advantage for compact mechanism arrangement.
Solution Approach 2:
The patent accepts and utilizes the asymmetric irregular-circular shape of the door, including the oblique straight edge between upper and lower half parts. By designing the arc-shaped guide rail to match this asymmetric geometry, the patent enables the lifting mechanism to be compactly arranged in the limited space while maintaining the distinctive door shape.
Data Source
AI summary
Disclosed herein is a vehicle door with an irregular-circular frame for a recreational vehicle. A door window glass of the vehicle door includes a fixed glass (2) and a movable glass (1). The fixed glass (2) is fixedly installed in a portion of the door window surrounded by a lower door body (6), an outer frame (5) and a movable glass guide rail (9). The movable glass guild rail (9) has an arc rail. The movable glass (1) is installed on the lower door body (6) at the center of the arc of the movable glass guide rail (9) via a shaft sleeve and a shaft (4). A lock member (3) with a lock pin is installed on the upper part of the portion where the movable glass (1) engages with the movable glass guide rail (9). A stop block for adjusting the opening degree of the movable glass and stopping the lock pin of the lock member (3) is provided on the movable glass guide rail (9). Compared with the prior art, the vehicle door according to the present invention can solve the difficulty of opening and closing the widow glass of the vehicle door with the irregular-circular frame.