Abstract:
A cross arm module for a vehicle door is provided, the cross arm module having a plastic carrier plate configured to have a periphery to completely cover a periphery of an opening in an inner panel of the vehicle door, the plastic carrier plate having an inner surface and an outer surface; a window lift system mounted to the outer surface, the window lift system having a pair of cross arms each being pivotally secured to each other and movably secured to the outer surface for movement between a first position, wherein the window lift system is capable of being positioned such that no components of the window lift system extend past the periphery of the carrier plate and a second position wherein the window lift system is capable of extending past the periphery of the carrier plate; and a sealing member disposed about the periphery of the carrier plate, the sealing member providing a moisture barrier between the carrier plate and the opening in the inner panel.

Description:
CROSS REFERENCE TO RELATED APPLICATIONS 
       [0001]    The present application claims the benefit of U.S. Provisional Patent Application, Ser. No. 61/085,378 filed Jul. 31, 2008, the contents of which are incorporated herein by reference thereto. 
     
    
     BACKGROUND 
       [0002]    Exemplary embodiments of the present invention relate to assemblies for vehicle doors and more particularly to a door module for a vehicle door. 
         [0003]    It is customary in the design and manufacture of vehicles to incorporate many parts into subassemblies to increase manufacturability. These subassemblies, commonly called modules, include a number of interrelated parts that can be assembled quickly and easily and then subsequently incorporated into the final assembly of a vehicle. 
         [0004]    One such module is a module mounted to a vehicle door. Door modules can include wiring harnesses, an inside handle and latch system, a window lift system as well as other components. The module is typically loaded into a doorframe from the inboard side wherein certain components such as the window lift mechanism must be loaded into an opening the module is covering. 
         [0005]    Moisture barriers are required to ensure that the interior passenger side of the door is kept dry by providing a seal about the opening the door module is being inserted onto. 
         [0006]    It is therefore desirable to provide a door module that is lower in production costs while maintaining the functional strength and performance of the panel and increased ease of manufacturability and installation. 
       SUMMARY OF THE INVENTION 
       [0007]    In accordance with an exemplary embodiment of the invention, a cross arm module for a vehicle door is provided, the cross arm module having a plastic carrier plate configured to have a periphery to completely cover a periphery of an opening in an inner panel of the vehicle door, the plastic carrier plate having an inner surface and an outer surface; a window lift system mounted to the outer surface, the window lift system having a pair of cross arms each being pivotally secured to each other and movably secured to the outer surface for movement between a first position, wherein the window lift system is capable of being positioned such that no components of the window lift system extend past the periphery of the carrier plate and a second position wherein the window lift system is capable of extending past the periphery of the carrier plate; and a sealing member disposed about the periphery of the carrier plate, the sealing member providing a moisture barrier between the carrier plate and the opening in the inner panel. 
         [0008]    In accordance with another exemplary embodiment of the present invention, a method for securing a cross arm module to a vehicle door is also provided, the method including the steps of moving a window lift system of the cross arm module to a stowed position such that no components of the window lift system extend past a periphery of a plastic carrier plate of the cross arm module; securing the plastic carrier plate to an opening in a vehicle door panel, the plastic carrier plate being configured to have a periphery to cover a periphery of the opening in the vehicle door, the plastic carrier plate having an inner surface and an outer surface; and extending the window lift system of the cross arm module to a full down position after the plastic carrier has been secured to the opening in the vehicle door such that components of the window lift system extend past the periphery of the plastic carrier plate of the cross arm module. 
         [0009]    Additional features and advantages of the various aspects of exemplary embodiments of the present invention will become more readily apparent from the following detailed description in conjunction with the drawings wherein like reference numerals refer to corresponding parts in the several views. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0010]      FIGS. 1 and 2  are side elevational views of an exemplary embodiment is a full down position; 
           [0011]      FIGS. 3 and 4  are side elevational views of an exemplary embodiment in a stowed position; 
           [0012]      FIG. 5A  is a side view illustrating a cross arm module of an exemplary embodiment of the present invention positioned over an inner door panel configured for a larger sized module; 
           [0013]      FIGS. 5B-5C  are side views illustrating an exemplary embodiment secured to a vehicle door configured for use with exemplary embodiments of the present invention; and 
           [0014]      FIG. 6  illustrates portions of an exemplary embodiment of the present invention. 
       
    
    
       [0015]    Although the drawings represent varied embodiments and features of the present invention, the drawings are not necessarily to scale and certain features may be exaggerated in order to illustrate and explain exemplary embodiments the present invention. The exemplification set forth herein illustrates several aspects of the invention, in one form, and such exemplification is not to be construed as limiting the scope of the invention in any manner. 
       DETAILED DESCRIPTION OF EXEMPLARY EMBODIMENTS 
       [0016]    Exemplary embodiments of the present invention relate to a cross arm module for a vehicle. In accordance with an exemplary embodiment of the present invention, a door module for a vehicle door is provided. In one exemplary embodiment, the carrier plate is molded from a material such as plastic or equivalents thereof. In one non-limiting exemplary embodiment and where applicable, the carrier plate and components of the carrier plate are manufactured from an easily molded or formed material such as plastic or equivalents thereof. 
         [0017]    Referring now to  FIGS. 1-4 , a door module  10  for installation in a vehicle door is illustrated. The door module has a carrier plate  11  configured for use with a cross arm window lift system  12 . The carrier plate has an inner surface  14  and an outer surface  16 . 
         [0018]    In an exemplary embodiment of the present invention the carrier plate of the door module is comprised of a plastic material having a forward end  18 , a rearward end  20 , an upper or first longitudinal edge  22 , and a second or lower longitudinal edge  24 . An outer periphery  26  defined by ends  18  and  20  and edges  22  and  24  of the door module is configured to match an opening in a vehicle door such that the door module can be secured to the vehicle door so that at least the window lift system  12  is inserted into the opening in the vehicle door and is received in a cavity of the door and the outer periphery provides a moisture seal about the opening in the vehicle door panel. 
         [0019]    The door module is mounted to the vehicle door using mechanical fasteners or any other suitable fastening mechanism or process. In one embodiment, the door module provides additional structure to give structural integrity to the door and various hardware components are attached to the module. 
         [0020]    An inside door handle assembly  30  is mounted to the inner surface of the carrier plate. An inside handle actuation assembly  32  of the inside door handle assembly  30  is also shown and extends from the inside handle assembly  30  to the exterior side  16 . Inside handle actuation assembly  32  may comprise cables or rods for actuation of a latch when the door handle assembly is manipulated. 
         [0021]    An outside handle assembly  34  is mounted onto the carrier plate or panel  11  for positioning on an inner panel  33  of a vehicle door  35  when the vehicle door is assembled. 
         [0022]    A motor  36  for driving the window lift system is mounted on the interior side  14  and provides the power to lift and lower the window glass. For example, the motor drives a sector gear  38  rotationally mounted to a housing  40  integrally molded to the carrier plate. 
         [0023]    As illustrated, the window lift system  12  is cross arm or X-type powered by the motor  36  and is directly fastened to the panel or carrier plate. The window lift system comprises a lift arm  42  having a first end  44  and an opposing second end  46 , wherein the first end is mounted to the sector gear  38  and the second end  46  is slidably mounted to a first channel member  48 . The sector gear is driven by a pinion and provides the mechanism by which the window glass is lifted and lowered. 
         [0024]    As illustrated, the first channel member is intended to engage the windowpane and is typically mounted to a lower portion of the windowpane. A balancing arm  50  pivotally connects the lift arm  42  at a point that preferably comprises a midpoint of the lift arm. The balancing arm has a first end  52  and an opposing second end  54 , wherein the first end is slidably connected to a second channel member  56  mounted onto the outer surface of the carrier plate or panel. The second end of the balancing arm is slidably mounted to the first channel member. 
         [0025]    Accordingly and referring now to  FIGS. 1-4 , the window lift system is illustrated in a full down position ( FIGS. 1-2 ) and a stowed or shipping position ( FIGS. 3-4 ) wherein the lift arm  42 , the first channel member  48  and the balancing arm  50  are positioned to be within the periphery of the carrier plate such that when the carrier plate is positioned over an opening in the door ( FIGS. 5B-5C ), the carrier plate covers the opening. Then the window lift system is capable of being inserted into the opening being covered by the carrier plate since the lift arm  42 , the first channel member  48  and the balancing arm  50  are positioned to be within the periphery of the carrier plate. Thereafter, the window lift system can be extended into the full down position wherein the lift arm  42 , the first channel member  48  and the balancing arm  50  are positioned outside of the periphery of the carrier plate but inside the vehicle door opening covered by the carrier plate. 
         [0026]      FIG. 5A  shows the module positioned over a door panel with a large opening  37  to illustrate how much smaller the carrier plate of the cross arm module of an exemplary embodiment of the present invention is compared to other modules as well as showing the cross arm module deployed from it stored position after installation to the inner panel. In accordance with an exemplary embodiment and as illustrated in  FIGS. 5B-5C , the periphery of the carrier plate will match the opening  37  in the door panel thus, minimizing the amount of plastic being used on the carrier plate.  FIG. 5B  is a view showing the inner surface of the door and door module while  FIG. 5C  is a view showing the outer surface of the door and door module. 
         [0027]    Thus, the periphery of the carrier plate and the associated opening in the door can be reduced to the size of the stowed position of the cross arm module and any other components. Therefore, the materials used for the plastic carrier plate are minimized since the opening  37  in the inner door panel only needs to be large enough to be covered by the reduced area of the carrier plate  11  thus reducing the overall cost of manufacturing the carrier plate and the window module. In other words, the cross arm module allows the carrier plate periphery to be smaller and thus opening  37  is smaller, which provides the material cost savings since the plastic required for the carrier plate is reduced. 
         [0028]    Referring to  FIGS. 1-6 , it is also desirable to provide separate “wet” and “dry” areas within the vehicle door to segregate components that do not tolerate water vapor from those that do. For example, electrical controls for power windows and locks (not shown), any wiring harnesses, speakers and inside handle assembly  30  are located on the interior side of the carrier plate thus preventing exposure to water vapor. 
         [0029]    In one non-limiting exemplary embodiment, a continuous seal is formed around the periphery of the carrier plate or panel or a substantial portion thereof where the seal interfaces with the inner panel of the door. The seal creates a water vapor barrier that eliminates the need for a separate plastic or foam water barrier. 
         [0030]    As illustrated in  FIGS. 1-6  and in particular  FIG. 6 , a sealing member  60  is secured along the peripheral portion of the carrier plate. In one non-limiting exemplary embodiment sealing member  60  is co-extruded or formed with any other equivalent process wherein sealing member  60  has two materials each being of a different durometer. For example, a first portion  62  has a stiffer durometer while a second portion  64  has a softer durometer (e.g., the first portion secures the sealing member  60  while the second provides the sealing function). In one embodiment the first portion  62  has a feature  68  for engaging a complimentary feature  70  of the peripheral portion of the carrier plate. This will allow the sealing member  60  to be easily installed to the periphery of the carrier plate by for example a rolling process or a hand applied process. Non-limiting examples of the material contemplated for the first portion would be a polypropylene (PP) and the second portion would be a thermoplastic (TPE) or equivalents thereof. 
         [0031]    Accordingly and as illustrated in  FIGS. 5B and 5C , the carrier plate  11  with sealing member  60  provides a seal or water barrier as carrier plate  11  is positioned to cover and seal opening  37 . 
         [0032]    In still another exemplary embodiment and referring to at least  FIGS. 1-5C , a latch retainer  72  is integrated into the molded carrier plate, thus saving the separate part cost and the cost of attachment. By integrating the retainer into the molded carrier plate, additional savings are provided by negating the separate part cost and the cost of the attachment of the separate part. 
         [0033]    The longitudinal variations are accommodated by a sliding action of a latch  74  onto integrated protrusion(s)  76  of the integral latch retainer  72 . Lateral and vertical variation is allowed by deflection of the protrusion(s), wherein the features are robust and engineered to provide the required motion. 
         [0034]    The latch is retained by an integral snap fit feature engaging with a receiver in the latch housing. This integration is also achieved without affecting the sealing of the wet/dry carrier by means of a slide action in the molding tool. Moreover, an additional advantage is that the assembly recyclability is also improved with a single material. 
         [0035]    Also shown is a rear glass run channel  80  for use with the window lift mechanism. 
         [0036]    A method of installing a cross arm door module is also provided, here the door module is positioned into the stowed position illustrated by  FIGS. 3 and 4  by energizing motor  36  or manually moving the bottom channel and arms to the position illustrated in  FIGS. 3 and 4 . Thereafter, the carrier plate is secured to an opening in the vehicle door such that the sealing member is disposed about the periphery of the opening in the door and the widow lift mechanism of the carrier plate is passed through the opening in the door ( FIGS. 5B and 5C ). Then the widow lift mechanism is capable of being deployed to the full down position wherein components of the window lift system extend past the periphery of the carrier plate. 
         [0037]    As used herein, the terms “first,” “second,” and the like, herein do not denote any order, quantity, or importance, but rather are used to distinguish one element from another, and the terms “a” and “an” herein do not denote a limitation of quantity, but rather denote the presence of at least one of the referenced item. In addition, it is noted that the terms “bottom” and “top” are used herein, unless otherwise noted, merely for convenience of description, and are not limited to any one position or spatial orientation. 
         [0038]    The modifier “about” used in connection with a quantity is inclusive of the stated value and has the meaning dictated by the context (e.g., includes the degree of error associated with measurement of the particular quantity). 
         [0039]    While the invention has been described with reference to an exemplary embodiment, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof without departing from the scope of the invention. In addition, many modifications may be made to adapt a particular situation or material to the teachings of the invention without departing from the essential scope thereof Therefore, it is intended that the invention not be limited to the particular embodiment disclosed as the best mode contemplated for carrying out this invention, but that the invention will include all embodiments falling within the scope of the appended claims.