US2640694A - Window regulator - Google Patents

Description

"lllllll u HIIIIIIIIIIIJIIHIIIII rlp III IIIIIIIIIIII n C. C. JACKSON WINDOW REGULATOR Filed Aug. 4, 1950 June 2; 1953 NW A Patented June 2, 1953 WINDOW REGULATOR Clifford C. Jackson,

Detroit, Mich., assignor to Chrysler Corporation, Highland Park, Mich., a

corporation of Delaware Application August 4, 1950, Serial No. 177,691

This invention relates to window regulators, particularly to electrically operated regulators of the jack screw type.

It is an object of the invention to provide a power operated window regulator which will easily and noiselessly raise and lower a window such as the window of an automobile body. According to one feature, provision is made to cushion the regulator mechanism from shock as the 'window frame is caused to accelerate and decelerate at intermediately open positions thereof.

According to another feature, an electric window regulator is provided in which no limit switches are found necessary but rather resilient elements are employed to stop movement of the 'parts gradually and without need for opening the power circuit by limit switches.

According to still another feature of the invention, a xed track is provided adjacent the screw shaft on which the nut travels, the track taking up any side thrust on the nut and thus serving to unload the screw shaft of lateral loads and bowing stresses to which it would otherwise vbe subjected.

According to yet another feature, a resiliently expansible element is provided for supporting the traveling nut of the mechanism in the V-ways of a fixed horizontal track whereby all slack and play will be automatically taken up as and when it may tend to develop between the nut and the track on which the nut travels. According to a further feature, the element which supports the traveling nut resiliently on fixed horizontal ways, is provided with sliding shoes formed of lubricant impregnated fabric; the shoes, to a partial or complete degree selflubricating as desired, furnish-a cloth-to-metal sliding action which has been found highly satisfactory particularly as concerns a shoe-carrying element of a biased character.

According to yet a further feature of the invention, provision is made to open circuit the electric power means for the regulator after a sustained attempt has been unsuccessfully made to drive the traveling nut against a spring bumper past the normal compressed position; thus the safety eiect of limit switches is attained without actual expense involved to provide limit switches. l

According to still a further feature, provision is made between the traveling nut and power arm, for an elastic member which can take the shock out of'impact of the window frame with an obstruction in the window opening during window closing;

such obstruction may be caused 2 Claims.' (Cl. 26S-124)' by a foreign object in the glass run, or by inanimate or animate objects such as an occupants hat, arm, or hand being in the window opening.

Power operated window regulators are not new but a jack screw type of regulator operated in the cushioned manner hereinafter described and shown in the drawings, is submitted as being new and as offering distinct advantages over other types of power operated window regulators heretofore proposed.

In the drawings: v

Figure 1 is a layout in elevation of the improved wndow regulator; and

Figure 2 is a transverse section of the driving connection at the traveling nut.

As respects Figure 1 particularly, av glass channel I0 is provided with an inner marginldenL Channel I0 has a ing a window opening I2. glass run indicated at I4,A for reception of the edge of a glass I6 suitably supported in a chanf nel I8. A bracket 20 on channel I8 is provided with ways defining a slot 22 in which cooperf ates a sliding pin 24. Pin 24, held in 4slot 22, by

va retainer 26, is carried by the end of a lever or arm 28. Arm 28 is formed with an offset portion 30 which suitably clears the glass I6 and window frame and together with a power arm 32 constitutes a bellcrank pivoted' to rotate with a pivot 34. Driving of the bellcrank in a cou'nf ,A terclockwise direction will, as follows from the fshowing of Figure 1, cause window panel I6 to open, whereas window'closing movement corresponds to the clockwise direction for the bellcrank. Pivot 34 is journalled in a bracket 36 suitably held by fasteners to a panel 40 which supports the entire mechanism. About pivot 34 is disposed a counterbalance spring 42, one end of which is secured at 44 to bracket 3E and the opposite end of whichl is secured for rotation with pivot 34 andthe bellcrank just described. Spring 42 is arranged such as to urge the bellcrank in a counterclockwise direction about pivot 34 and thus tend to counteract the weight of window panel I6 Panel 40 may be formed with an embossment .48 wherein is held by a fastenei` 52 a glass run support bracket 50 disposed in adjacency to window channel I0. Mounted to a relay panel .53 there may be a circuit ibreaker 54 connected in the circuit with a power source such as a battery 56 suitably grounded at 58. A lead from circuit breaker 64 forms a connection with a two-contact switch 6I) selectively operated by a movable switch member 62. Member 62 is movable into an up'position, indicated at `-62', the charactera power operated device or motor 84. Motor 8'4" is provided with an appropriate rotor such Aas of the double-wound type, which will-rotate in different directions one or. the other depending upon which of the respectiveterminals. B8 or 18 happens to be energized through the relays of panel 53. 84, is suitably journalled for rotation in a rear bearing 86. By appropriate fasteners as ata, motor 64 is mounted to a power assembly generally indicated at. 36. At oneend assembly 9.0 has-asupport bracket. 92 mounted by fasteners 96,` and at. the other end-a support bracket 94 xedly mounted by fasteners S.. Afront. bearing |0.0..for motor 64 serves to supporttherotor for. motor B4 as well as to journaly the. end |02 ofathreadedscrew shaft |00. The opposite end |0606 screw. shaft |04 has. a reducedsection |01 suitably receivedin a, bearing opening formed -by flanged parts |08. A fabric,v sleeve H0,` which may be impregnated with asuitable lubricant, lines, the bearing opening and. serves to journal the reduced portion |01. for rotation therein.V A

Athreaded portion ||.2l of. screw shaft end |06 receives an internally threaded collar H6. suit.-

ably held in placey at an appropriate axial station. along. the yscrew threads by a set screw H4. Collar |.I6- has. a. reduced portion ||8 around which issecured the endof a. resilienty windup part |Whioh maybeacoilspring. The oppof site end of part. |20 is connected to a smooth bored. flanged collar |24, which is freel to slide along the screw threads without rotating and against which rests a thrust washer |22.. A similar Windup Dart. |26 is provided atthe opposite end |02 of the screw shaft |04 andhasa smooth bored. hanged collar |28and a washer |29, the washer |29 serving likewise. as a thrust washer. Power arm 32.has a slot |30 formed by swinging guides` |.32..and. |34.. A pair offixed guidesfor. a nut. asseiro-bly.v |36. is provided at |33 and |35 on thenower assembly 90. Guides. |32Y and |34. also provide, a .track for receptionof the nut assembly |36` whichthenserves to coordinate movementofthe, powerarm k32. relative to. guides |33 and. |35 as. the nut. assembly |36. travels. along the latter.

As particularly. regards Figure. 2', in. the slot |30 inward of. guide |34 is` received a.v tire or collar. |38having a retaining ange |40 for. retention inthe track constituted byk slot..|30. Between flanged. collar |38 and a retaining washer |42 of assembly. |36 there is provided anelastic part |44 of generally annular shape. P art, |44 maybe ofV a resilient rubber or-rubber-like composition or else. formed of a suitably resilient plastic or. resin. Centrally of elastic part |44 is formedan. opening |46 in which may be receiveda pin |l48carried by a nut |50. Pin |48 has its outer end |52 formed to receive a: suitable fastener |54 for washer |42. Nut- |50 re! ceiyesA theY screw shaft |04 by suitable internal threads such asat. |56 engaged. for appropriate movement. therealong. Guides |33 and |35 for thenut provide V-Ways |58 and |60 against The rotor, not shown, for motor.

4 which are adapted to bear fabric shoes |62. Fabric shoes |62 are preferably impregnated by some such lubricant as tallow, resins, and/or grease and is firmly bonded as by cement to resiliently biased portions |64 of a resilient element |68. Resilient portions |64 are urged laterally outwardly of nut |50 and press resiliently against V-ways |56 andl |60: to prevent any slack or play from developing betweenthe V-ways and the nut |50 suitably supported therein by resilient element |68. Additional lubricant may also beprovided on V-ways |58 and |60 to supplement the self-lubricating character of the shoes |62.` A central opening |10 is provided in resilient. element |66 for reception of the pin |48 carried by nutz |50, the nut engaging element |68 adjacent opening |10.

The overall operation of the device of Figures l and. will now be set forth. From the neutral position shown at 62, the switch member may be moved upwardly. or. .downwardly to actuate cause the motor 84 to be energized for rotation in one direction or the other. Screwy shaft |04 rotates with the rotor of motor 64. to vcause the. nut |50and the nut assembly |66y to travel rectilinearly along the4 guides |33 and |35. As thenut |50. approaches. either end `of traveL, it begins to. engage one or the other of thrust washers |22 and. |29 and to compress the appropriate` winclup spring |20 or. |26. The Wind-up spring tends to absorb, the energy of movement of the. moving parts.: ofl the-mechanism and to bring screw shaft |04 and power -arm |32 toa gradual though positively imposed stop; Conf tinued operation of switch member-'62 will, after al1 movement of they arm. is overcomeby-windup partA |20 or |26, eventually; cause the circuit breaker .54:to actand open-circuit the power-confnection to motor 81|. Inasm-uch as` theparts- |20 and |26. are resilient, nut: |5|`|willk not tend. to ,iamA up on the threads of screw shaft |04A due tof shoclibut rather will progressively be brought to a positive stop. When the direction of rota.- tion of motor 84 is reversed, the energy stored in parts 20. or |26-, as the-case may be, will tend to start the nut. |50. in thev opposite direction of motion..

As particularly respects Figure 2, the elastic part |44 vand tire |38 consttutea member adapting pin |46 for slidable and rotatablemovement inthe track providedby slot |30. The elastic connection. permitted by part |44(` makes provision for abruptstopping of. movement of window glass, I6inintermediate positions and takes the shock. out4 of. the irripaot4 of a, window l IE5-with foreign, bodies in the window opening. Nut |50 is resiliently supported in, V-ways |58 and' |60 in a manner. thatv side thrusts on nut |50 are transmitted to guides |33 and |35 thereby unloading screw. shaft |04 ofstresses besides-..ten sion and compression. Since portions |64 on element |68 are resiliently biased against the V-ways. the nutl |50 will tend to be self-center.- ing. as respects the plane of the angled portions of; the V-Ways. |58 and |60, the slack which4 may result inV such mechanisms being automatically compensated fory by thei'esiliently held portions |64. i Variationsl within the spirit and-j scope ofA the described invention arev equally comprehended by the foregoing description. f

I claim: l.. In a. window regulator, the combination of a windowfliftingmeohanism having apowerarm,4

a rst track on the power arm of the lifting mechanism and formed with near edges in opposed spaced relationship, a iixed track fXedly supported adjacent the arc of swing of the power arm and formed with angled near edges in opposed spaced relationship, a spring metal element having portions retained between the angled near edges of said fixed track and pressing resiliently outwardly thereagainst, said portions of the spring metal element being provided with shoe means bearing directly on said angled near edges and comprising an impregnated fabric bearing material, a tire slidable along the near edges of said first track having a centrally apertured elastic core, a nut supported by said resilient element and having a pin journalled in the central aperture of said elastic core, and a power operated screw shaft xedly supported in the plane of said angled near edges and drivingly engaging the nut to cause the nut to travel therealong for resiliently coordinating relative motion of the tracks to one another.

2. In a window regulator, the combination of a window lifting mechanism having a power arm, a first track on the power arm of the lifting mechanism and formed with near edges in opposed spaced relationship, a fixed track xedly supported adjacent the arc of swing of the power arm and formed with angled near edges in opposed spaced relationship, a spring metal element having V-notched portions retained between the angled near edges of said fixed track and pressing resiliently outwardly thereagainst,

said portions of the spring metal element being provided with shoe means bearing directly on said angled near edges and comprising an impregnated fabric bearing material, a tire slidable along the near edges of said first track having a protruding rirn preventing lateral displacement therefrom and provided with a centrally apertured elastic core, a nut supported by said resilient element and having a pin journalled in the central aperture of said elastic core, and a power operated screw shaft Xedly supported in the plane of said angled near edges and drivingly engaging the nut to cause the nut to travel therealong for resiliently coordinating relative motion of the tracks to one another.

CLIFFORD C. JACKSON.

References Cited in the file of this patent UNITED STATES PATENTS Number Name Date 1,497,405 Robertson June 10, 1924 1,571,819 Toresan Feb. 2, 1926 1,891,457 Stannard Dec. 20, 1932 2,011,057 Kraft Aug. 13, 1935 2,337,867 Brotman et al Dec. 28, 1943 2,337,902 Lakin Dec. 28, 1943 2,379,478 Delp July 3, 1945 FOREIGN PATENTS Number Country Date 664,334 France Apr. 22, 1929

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