Window lift mechanism
a technology for lifting mechanisms and windows, applied in door/window fittings, wing accessories, transportation and packaging, etc., can solve the problems of inefficient mechanical efficiency of swing mechanism, use of light-weight materials, and increased space and electrical power, so as to achieve more time for reaction
Inactive Publication Date: 2005-07-28
FENELON MARGARET FENE
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Benefits of technology
[0011] According to yet another aspect of the present invention, the dual rack and pinion assembly is provided with a smart motor capable of detecting unusual forces applied to the window while being closed and capable of either shutting off or reversing drive of the motor. The system is further provided with one or more resilient shock absorbers operably engaged between the worm gear and pinion gears in order to allow the drive motor to have more time to react to unusual forces applied to the window.
Problems solved by technology
The scissor-type and drum and cable mechanisms are typically mechanically inefficient, prohibiting the use of light-weight materials and requiring the use of relatively large motors to drive the system.
The large motors necessarily require increased space and electrical power and also increase the weight of the system.
This results in excessive worm gear speed in the range of 3000 to 4000 RPM which causes excessive worm gear tooth shock and armature noise.
Further, the scissor-type mechanism does not take into account the manufacturing deviations in the door, specifically with the window frame and mounting points, and deviations in the manufacture of the scissor-type mechanism.
Deviations in the door and scissor-type mechanism result in larger than necessary forces being applied to the window when it cycles up and down.
The larger force on the window causes undesirable noise in the passenger cabin.
Method used
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[0034] The following description of the preferred embodiment(s) is merely exemplary in nature and is in no way intended to limit the invention, its application, or uses.
[0035] Referring generally to FIG. 1, a vehicle door 10 is shown schematically including a window lift mechanism 12. A window 14 is supported by the window lift mechanism 12 and is located within the automobile door 10. The window lift mechanism 12 includes a support structure 16 and a drive system 18. The drive system 18 is supported by the support structure 16 and serves to drive the support structure 16 relative to a pair of racks 20, 22 which are securely mounted to the door 10.
[0036] The support structure 16 includes a main bracket 24. According to a first embodiment, a pair of guide brackets 26 (best shown in FIGS. 3 and 4) are mounted to the main bracket 24 by a fastener 28 and a nut 30. The guide brackets 26 include a body portion 32 including an elongated vertical slot 34 for receiving the fastener 28. A p...
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A dual rack and pinion system is provided for a window lift mechanism. The window lift mechanism includes improved window brackets for simple mounting to a window. A modular frame design is provided to improve assembly of the window lift mechanism into the door of a vehicle. An improved assembly method is provided for the dual rack and pinion system. The system is also provided with a smart motor and incorporates resilient shock absorbers in the dual rack and pinion gear train to allow more time for the smart motor to detect and react to an obstruction in the window.
Description
CROSS-REFERENCE TO RELATED APPLICATIONS [0001] This application is a divisional of U.S. patent application Ser. No. 10 / 400,820, filed on Mar. 27, 2003, the disclosure of which is incorporated herein by reference.FIELD OF THE INVENTION [0002] The present invention relates generally to an apparatus for moving a window into an open or closed position. In particular, the present invention relates to a mechanism for use with an automobile window, wherein the mechanism utilizes an improved dual rack and pinion assembly and method of manufacturing. BACKGROUND OF THE INVENTION [0003] Modern automobiles typically include a window lift assembly for raising and lowering windows in the door of the vehicle. A common type of window lift assembly incorporates a “scissor mechanism” or a drum and cable mechanism. A scissor-type system utilizes a series of linkages in a scissor configuration such that as the bottom linkages move apart, the top linkages do as well, resulting in a scissor-like motion. ...
Claims
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IPC IPC(8): E05F11/38E05F11/42E05F15/00
CPCE05F11/385E05F11/423E05Y2600/46E05Y2900/538E05Y2900/55E05F15/689E05Y2201/49E05Y2900/50E05F15/40E05F15/41E05Y2201/434
Inventor FENELON, PAUL J.
Owner FENELON MARGARET FENE