Window regulator mounting panel

A mounting device is provided for mounting a window regulator drive unit on a molded plastic mounting panel. A plurality of flexible tabs are molded integral with the mounting panel and adapted to engage with the window regulator drive unit to retain the drive unit on the mounting panel. A molded plastic cap is adapted to fit over the drive unit and has integrally molded mounting fingers for engaging with complimentary integrally molded mounting fingers provided on the mounting panel so that rotation of the plastic cap causes inter-engagement of the mounting fingers and the drive unit is captured between the cap and the mounting panel. The cap has slots therein which become engaged with projecting lugs of the flexible tabs upon rotation of the cap relative to the mounting panel so that the flexible tabs become blocked and cannot be disengaged from their respective engagement with the drive unit. In addition, at least one of the mounting fingers has a ramp surface thereon so that the cap progressively wedges the cap into tighter engagement with the mounting panel to further assure retention of the cap on the mounting panel.

FIELD OF THE INVENTION 
The invention relates to a window regulator and, more particularly, 
provides a cap for retaining a motor assembly or manual drive unit on a 
molded plastic mounting panel. 
BACKGROUND OF THE INVENTION 
In Compeau et al., a molded plastic mounting panel is provided for mounting 
a window and a window regulator in a vehicle door. The mounting panel is 
comprised of a one-piece plastic molded member having a central planar 
mounting plate adapted to mount the window regulator, and a plurality of 
spaced apart spokes molded integrally with the center planar mounting 
plate and radiating generally forwardly and/or rearwardly therefrom to 
mount a guide channel. The guide channel receives the edges of the window. 
The window guide channels are integrally molded with the radiating spokes. 
The spokes are hollow tubular members of generally circular cross section. 
A plurality of aperture mounting brackets are molded integrally with the 
spokes for receiving fasteners by which the mounting panel is mounted on 
the vehicle door. A plurality of snap fasteners are integrally molded with 
the mounting panel for snap together fastening of such door operating 
hardware as the window regulator, window regulator motor (in cases of 
powered operation), door handle and door latch control rods. 
The present invention provides a new and improved mounting device for 
reliably mounting the window regulator on the mounting panel. 
SUMMARY OF THE INVENTION 
According to the invention, a mounting device is provided for mounting a 
window regulator drive unit on a molded plastic mounting panel. A 
plurality of flexible tabs are molded integral with the mounting panel and 
adapted to engage with the window regulator drive unit to retain the drive 
unit on the mounting panel. A molded plastic cap is adapted to fit over 
the drive unit and has integrally molded mounting fingers for engaging 
with complimentary integrally molded mounting fingers provided on the 
mounting panel so that rotation of the plastic cap causes inter-engagement 
of the mounting fingers and the drive unit is captured between the cap and 
the mounting panel. The cap has slots therein which become engaged with 
projecting lugs of the flexible tabs upon rotation of the cap relative to 
the mounting panel so that the flexible tabs become blocked and cannot be 
disengaged from their respective engagement with the drive unit. 
In addition, at least one of the mounting fingers has a ramp surface 
thereon so that rotation of the cap progressively wedges the cap into 
tighter engagement with the mounting panel to further assure retention of 
the cap on the mounting panel.

DETAILED DESCRIPTION OF THE DRAWINGS 
Referring to FIG. 1, a module 10 for a vehicle door is comprised of various 
door hardware elements mounted on a one-piece molded plastic mounting 
panel generally indicated at 7. The mounting panel 7 includes integrally 
molded rear guide channel 12 with a plurality of hollow tubular spokes 14 
and 16. 
The mounting panel 7 also includes a generally planar window regulator 
mounting plate 18 which is an integrally molded part of the mounting panel 
7 and spans between the spokes 14 and 16. The mounting plate 18 is 
reinforced by a network of strengthening ribs 20. The network of ribs 20 
also defines a circular hub 22 having a bore 24 in which a metal pivot 
shaft 26 is rotatable. The shaft 26 is nonrotatably attached to a stamped 
steel regulator lift arm 28 of a window regulator, generally indicated at 
30. 
The arm 28 carries a slide 32 on an end thereof which rides in a sash 
channel 34 attached to a window pane (not shown). The window regulator 30 
also includes a regulator arm 36 which is pivotally connected to the arm 
28 by a pin 38. The arm 36 has a slide 40 carried thereon which rides in 
the channel 34. The arm 36 also has a slide 42 pivotally carried on the 
other end thereof which rides in a slot 44. 
The mounting panel 7 also has integral features which enable the mounting 
of a drive unit, in particular a motor assembly 46 for operating the 
window regulator 30. As seen in FIGS. 1-4, the motor assembly 46 includes 
a gear box 48 having mounting lugs 50, 52 and 54 spaced around the 
circumference thereof. The motor assembly 46 is assembled to the mounting 
plate 18 with the gear box 48 juxtaposed with the face of the mounting 
plate 18. A pinion gear 56, seen in FIG. 4, extends into a cup shaped 
journal portion 58 of the mounting plate 18 and seats within an aperture 
59. The journal portion 58 has an open side by which the teeth (not shown) 
of an arcuate sector (not shown) carried by the arm 28 engage with the 
pinion gear 56. 
The motor assembly 46 is anchored against rotation by a series of 
cylindrical studs 60 which project from the mounting plate 18. The studs 
60 penetrate into corresponding bores 62 of the lugs 50, 52 and 54. The 
motor assembly 46 is fastened against removal by resilient snap tabs 64 
which project laterally from the mounting plate 18. Each tab 64 has an 
undercut shoulder 66 for engagement with the lugs 50, 52 and 54. A pair of 
backup abutments shoulders 68 which are separated but closely spaced from 
each tab 64 prevent the overtravel of the tabs 64. The motor assembly 46 
is installed upon the mounting panel 7 by thrusting the gear box 48 in a 
direction toward the mounting plate 18. The lugs 50, 52 and 54 push the 
tabs 64 radially outward until such time that the tabs 64 can return to 
their original position placing the shoulder 66 over the lugs 50, 52 and 
54 as seen in FIG. 4. 
According to the invention, as best seen in FIGS. 2, 3 and 4, a structural 
molded cap 78 is provided to capture and further retain the motor assembly 
46 on the mounting plate 18. The cap 78 has three depending skirts 80, 82 
and 84 which terminate with upturned fingers 92. The cap 78 also has three 
wings 86 having elongated arcuate slots 88 with enlarged access openings 
90. 
After assembly of the motor assembly 46 to the mounting plate 18, the cap 
78 is then brought over the gear box 48 with the openings 90 of the wings 
86 fitting over studs 74 which are provided on each of the tabs 64. The 
cap 78 is then rotated counterclockwise so that the upturned fingers 92 of 
the cap 78 are carried into engagement beneath a plurality of downturned 
fingers 76 provided on the mounting plate 18 to thereby lock the cap 78 to 
the mounting plate 18. In addition, the downturned fingers 76 preferably 
having upward facing ramp surfaces 72 which causes a progressive 
interference with the underside of upturned fingers 92 during rotation of 
the cap 78. Simultaneously, this rotation of the cap 78 causes the stud 
projections 74 to be tightly captured within the slots 88 to lock the tabs 
64 in engagement with the lugs 50, 52 and 54 of the motor assembly 46. The 
cap 78 has a lower annular wall 94 which captures the gear box 48 of motor 
assembly 46 between the cap 78 and the mounting plate 18 in a compressive 
arrangement. 
Referring now to FIGS. 5, 6 and 7, it will be seen that the invention may 
also be utilized in conjunction with a manual drive unit 98 which is a 
window regulator of the type in which a crank is rotated in order to raise 
and lower the window. In particular, as seen in FIG. 5, a manual spindle 
100 is rotatably mounted on a plastic base 102 which includes 
circumferentially spaced mounting lugs 104, 106 and 108, each having a 
bore 110. In comparing FIG. 5 with FIG. 2, it will be appreciated that the 
lugs of the manual assembly are positioned identically with the lugs 50, 
52 and 54 of the motor assembly 46 so that the manual drive 98 can be snap 
installed onto the same mounting plate 18 as discussed herein before. 
Furthermore, the retaining cap 78, discussed hereinbefore, is readily 
installed over the manual drive 98 to capture and retain the manual drive 
unit 98 on the mounting panel 7. 
Thus, it is seen that the invention provides a new and improved window 
regulator mounting panel in which a molded plastic structural cap is 
employed to securely retain a window drive's unit, which may be either a 
motor assembly or a manual window drive unit in place on the mounting 
panel. 
In the preferred embodiment discussed herein, the cap and the mounting 
panel have inter-engaging fingers which become engaged upon rotation of 
the cap to lock the cap to the mounting panel. However, it would apparent 
to a person of ordinary skill in the art that other types of twist lock 
structures may be employed to effect the rotary engagement between the cap 
and the mounting panel. Furthermore, although the preferred embodiment 
specifically teaches the provision of slots 88 on the cap and stud 
projections 74 on the flexible tabs 64, it would be apparent to a person 
of ordinary skill in the art that other forms of engagement may be 
obtained between the cap and the flexible tabs upon rotation of the cap in 
order to block the flexible tabs and thereby assure their engagement on 
the lugs of the drive unit.