US1670475A

US1670475A - Manufacture of gearing for window regulators

Info

Publication number: US1670475A
Application number: US64470A
Authority: US
Inventors: Stanley W Nicholson
Original assignee: Dura Co
Current assignee: Dura Co
Priority date: 1925-10-23
Filing date: 1925-10-23
Publication date: 1928-05-22
Anticipated expiration: 1945-05-22

Description

May 22, 1 928.

S. W. NICHOLSON MANUFACTURE OF GEARING FOR WINDOW REGULATORS 2 sheets-sheet 1 Filed Oct. 23, 1925 aktozumab S. W. NICHOLSON MANUFACTURE OF GEARING FOR WINDOW REGULATORS Filed Oct. 25, 1925 2 Sheets-Sheet 2 61 Roar-e1 0 creased.

Patented m 22, 1928.

UNITED STATES PATENT OFFICE.

swarm w. NICHOLSON, OF TOLEDO, OHIO, ASSIGNOR TO THE DUBA COMPANY, O

TOLEDO, OHIO, A. CORPORATION 01 DELAWARE.

' macro or enamne roa 'wmnow nneunarons.

Application flied October 23,1925. Serial no. euro.

The invention relates to the manufacture of window regulators and has for one of its objects an improved method of manufacture whereby the efliciency and smoothness of operation of the window regulator are inv rnother object is to manufacture the windo regulator at reduced cost. A further object is to mamifac'ture by an .improved method a gear member which forms art of the actuating mechanism of the Winow regulator. With these as well as other objects in, view the invention resides in the 7 novel features as more fully hereinafter set forth.

In the drawings Figure 1 is a perspective view of a blank from which a gear member for a window re lator is formed;

igures 2 and 3, are respectively side and go edge elevations of a blank formed by the first step of my method;

Figures 4 and 5 are respectively side and edge elevations of a blank formed by the second step of my method;

Figure 6 is a cross section on the line 6-6 of Figure 4;

Figure 7 is an enlarged side elevation of a portion of Fi re 4;

Figures 8 and are respectively side and edge elevations of the completed blank;

Figures 10 and 11 are respectively side and edge elevations of a 'gearisegment and lifter arm of a window regulator rigidly secured to eachother.

Figure 12 is a side elevation of the complete window regulator;

Figure 13 is a side elevation showing the manner of rolling the blank;

Figure 14-is'a cross section on the line I l-+14 of Figure 13.

In one type of window regulator gearing is used in the actuating mechanism to raise or lower a window from the handle of the window regulator. As specifically shown in Figures 12 and 13 the window 1 which 1s guided in a frame is adapted to be raised or lowered by means of the lifter arm 2 of the 7 window re lator, there being a suitable connection etween the outer end of this lifter arm and the window. The inner end of this lifter arm is pivotally mounted at 3 upon the mounting plate 4. 5 is a gear member which in the present instance is a gear segment rigidly secured to the lifter arm and having its teeth concentric with the pivot 3. 6 is a pinion meshing with the gear segment and adapted to be rotated by means of the handle '1.

With my method of manufacturing the gear segment-I start with a sheet steel blank 8 of substantially uniform thickness and having a Width preferably slightly greater than the diameter of the gear segment. This blank 8 is operated upon by a suitable punch which stamps out circular blanks such as illustrated by the blank 9 in Fi ures 2 and 3. This blank has the perip eral roughed out oversized teeth 10, the axial opening 11, the symmetrically dis osed

openings

12 and 13 and the symmetrically disposed pairs of

lateral projections

14 and 15. One of the openings 13 is preferably provided with a radial extension 16 between and on the radius connecting the axis of the blank and the axis of the opening.

This blank with several others is then operated. upon by a suitable tooth-forming die .17 as shown in Figures 13 and 14, the blanks being separated and clamped between clamping members. This die ispositively rotated and generates teeth 18 of" maximum accuracy upon the blanks when these blanks are brought into engagement with the die. The blanks are accurately located relative to each otherby means of pins which extend through the axial openings 11 and the openings 13 of the blanks, the pin extending through the openings having a longitudinal projection which is engageable in the extensidns 16. In thismanner the teeth of a number of gear blanks can be generated at the same time by engagement with a tOOtl'l-fOlll'llllQ die. -Thisdie While generating the teeth compels the material forming the teeth to fiow laterally in both directions and furthermore makes the hearing surfaces of the teeth more dense and hard as well as burnishes the same. In

addition the die deflects the material at the bases of the interdental spaces to form the lateral projections 19 and hardens the radial outer surfaces of these lateral projections. The gear blank after its teeth have been rolled is shown particularly in Figures 4,

5, 6 and 7 After the teeth of a circular gear blank have been generated by rollingengagement with a tooth-forming die the circular blank is severed to reduce two like gear segments each segment aving the

openings

12 and 13, the lateral rojections 14 and .15 and a recess equal to half the axial opening 11, the severing forming the

edges

21 and 22 extending inwardly from opposite points of the pe- Iiphery parallel to the diametrical line extending through the centers of the

lateral projections

14 and 15 and equally on opposite sides of this line, these edges tcrmmating at oints to be connected by the edges 23 .inc med at 45 degrees and passing through the axis of the blank. The circular gear blank is preferably operated upon prior to or at the time of severin to flatten the teeth and projections at the bases of the interdental spaces located in line with the

lateral projections

14 and 15 and adjacent thereto. The gear segment as thus far illustrated is shown particularly in Figures 8 and 9.

After the gear segments have been formed each is rigidly secured to a sheet metal lifter arm of the window regulator, this step being preferably performed by spot welding and with the lifter arm and gear segment positively held in correct relative positions and the lifter arm bearing against the

projections

14 and 15 through which the spot welding is preferably effected. The flattened tooth portion 20 of the gear segment affords clearance for the lifter arm so that the latter may lie against the gear segment.

From the above description it will be readily seen that I have devised a very efficient manner of forming window regulators and also for forming units which comprise a gear segment and lifter arm. With this method a material reduction in cost of manufacture is effected and at the same time a product of higher quality is secured.

What I claim as my invention is:

1. In the manufacture of gearing of window regulators, the method of making a toothed member which comprises punching a sheet metal blank to form a blank having oversized teeth and rolling the oversized teeth to final form.

2. In the manufacture of gearing of window regulators, the method of making a gear member which comprises punching out oversized teeth on a circular sheet metal blank, rolling the oversized teeth to final form and severing the circular blank with the rolled teeth to form a plurality of gear members. I

3. In the manufacture of caring of window regulators, the method of making a gear segment which comprises punching a sheet metal blank of substantially uniform thickness to form a circular blank havin oversized teeth, rollin the oversized teet to final form and severing the circular blank with rolled teeth to form a plurality of like gear segments.

4. In the manufacture of a window regulator, the punching of a sheet metal blank to form a circular blank havin peripheral oversized teeth, the rolling of tie oversized teeth to final form, the severing of the circular blank with rolled teeth to form a pin rality of like gear segments, and the securing of like lifter arms to the gear segments.

5. In the manufacture of a window regulator, the punching of a sheet metal blank to form a circular blank having peripheral oversized teeth, the rolling of the oversized teeth to final'form, the severing of the circular blank with rolled teeth to form a plurality of like gear segments, the severing operation being such as to form straight spaced edges extending inwardly from opposite points of the periphery and lying parallel to each other and being connected at their inner ends by an inclined edge ortion passing throu h the axis of the blank.

6. In the manu acture of a window regulator, the punching of a sheet metal blank to form a circular blank havin peripheral oversized teeth, the rolling of tie oversized teeth to final form, the severing of the circular blank with rolled teeth to form a plurality of like gear segments, the severing operation being such as to form straight spaced edges extending inwardly from opposite points of the periphery and lying parallel to each other and being connected at their inner ends by an inclined edge portion through the axis of the blank, the forming of projections upon each segment adjacent one of the straig t edges and the welding of lifter arms to each gear member at the points where the projections extend from the gear members.

In testimony whereof I afiix my signature.

STANLEY W. NICHOLSON.