Movable or removable closures – Panel with closure feature – With means to accommodate window accessory; e.g.,...
Patent
1986-01-21
1988-09-13
Dorner, Kenneth J.
Movable or removable closures
Panel with closure feature
With means to accommodate window accessory; e.g.,...
296146, B60J 504
Patent
active
047699515
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
1. Field of the Invention
The invention relates to a door made of plastic material for motor vehicles, with a stiffening suitable for receiving the outer and inner shells of the door, said stiffening transmitting the forces occurring into the frame of the body of the vehicle.
2. Description of the Prior Art
Indisputably, the side door is a highly complicated component of the body of a motor vehicle. The door has to have exceptionally high strength and is expected to function even after a collision accident.
Generally, a door made of steel sheet satisfies said requirements. Efforts made to reduce the weight have resulted in door designs comprising a plastic outer shell of the door and a plastic inner shell of the door applied to a stiffening construction consisting of steel profiles or sections. The forces acting on such a construction are transmitted into the frame of the auto body by the stiffening construction consisting of steel sections. With a known design, the outer and inner shells are manufactured by deep-drawing and combined with each other.
Said doors represent a combination of different materials; however, such doors do not meet the requirements in automobile construction particularly with respect to safety.
Now, the present invention is based on the problem of further reducing the weight of a plastic door for motor vehicles and to construct such a door in such a way that it will fully satisfy all requirements without a stiffening construction made of steel sections while still having substantial safety reserves.
SUMMARY OF THE INVENTION
According to the invention, said problem is solved in that the stiffening designed as a supporting construction, the outer shell of the door and the inner shell of the door are formed by prefabricated plastic parts capable of being joined together and produced mainly by injection molding, whereby the supporting construction may be formed by a profiled frame extending all around and having a reinforcement injection-molded beneath the window opening. Advantageously, the reinforcement injected in the profiled frame is formed by horizontally extending load profiles and vertically extending ribs in the form of a latticework construction. Said load profiles may have any desired shape; however, advantageously, they have the shape of a "V", double "T" or "I" beam, or "U".
Said design provides a frame construction with torsional rigidity. The load profiles permit the transmission of forces between the hinges and the zone of the locking mechanism.
In accidents, the load profiles are kept in their horizontal position by the vertically extending ribs. The latticework formed by the horizontally extending load profiles and vertically extending ribs represents a safety cell by which forces occurring in accidents are transmitted into the metal frame of the body of the vehicle.
According to another feature of the invention, the profiled frame has a cross section with the shape of a double "T" or "U". Stiffening ribs extending parallel to the flanges are injected on both sides of the crosspiece of the double T-shaped profiled frame and on the crosspiece of the U-shaped profiled frame. Said stiffening ribs serve primarily for stiffening the profiled frame.
According to another feature of the invention, the outer shell of the door has an areal stiffening disposed on the inside of the shell, usefully, said stiffening has an asymmetric star shape with different wall thicknesses. Advantageously, the outer side of the window pane is disposed approximately on one plane with the window facing and outer shell of the door. In this way, a low drag value is achieved within the zone of the window of the door and wind noise is largely avoided.
The invention provides a fully plastic door for motor vehicles that is produced mainly by injection molding. Said door offers a significant weight reduction and it meets or largely exceeds the safety requirements given for such doors. By using a high-quality plastic door made by injection molding it is possible for the fir
REFERENCES:
patent: 4365443 (1982-12-01), Miara
Anderson Gerald A.
Dorner Kenneth J.
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