US2431960A - Armature fan puller - Google Patents

Description

' Dec. 2, 1947. s. ORILEY. 2,431,960

' ARMATURE FAN FULLER Filed Feb. 7, 1945 2 Sheets-Sheet) WWWHMI I Inventor Patented Dec. 2, 1947 UNITED STATES PATENT OFFICE Shaw OFRi IeY, Nashville, Tenn. Application February 7, 1945', Serial N10. 576,622 1 Olsen. (01. 2H6!) The present invention relates to new and useful improvements in tools adapted for pulling fans from. armatures of a type used with riveting guns and air and electric machine drills.

Such. riveting guns. and air and electric machine drills are equipped with fans for cooling the armature, and the fan, together with a ball-bearing assembly, is mounted on the armature shaft for rotation therewith.

After extensive use of these armatures, the fan and bearings become tight on the shaft and removal of such parts has heretofore been accomplished with considerable difficulty and labor, thereby adding to the expense of removing and repairin such parts.

It is, accordingly, an object of the present invention to provide a tool adapted for easily and quickly removing the fan and bearings from the armature shaft in a manner so as to avoid injury to the shaft as well as to the armature.

A further important object of the invention is to provide a tool of this character which may be attached to a work bench or other supporting structure within convenient reach by the workman doing the repair of the armature.

A still further object is to provide a tool of this character of simple and practical construction, strong and durable, relatively inexpensive to manufacture, and otherwise well adapted for the purposes for which the same is intended.

Other objects and advantages reside in the details of construction and operation as more fully hereinafter described and claimed, reference being had to the accompanying drawing forming part hereof, wherein like reference numerals refer to like parts throughout, and in which:

Figure 1 is a side elevational view,

Figure 2 is a similar view of another side of the tool,

Figure 3 is a top plan view with the screw and lifting arm removed,

Figure 4 is a side the lifting arms,

Figure 5 is a transverse sectional view through the crossbar taken substantially on a line 55 of Figure 7,

Figure 6 is a sectional view taken substantially on the line 6-6 of Figure 1, and

Figure 7 is a plan view of the cross bar.

Referring now to the drawings in detail, wherein, for the purpose of illustration, I have disclosed a preferred embodiment of the invention, the numeral 5 designates a base adapted for supporting on or attaching to a bench in any suitelevational view of one of able manner; the basehaving two pairs of postsbe apparent from an inspection of Figure 2 of the drawing.

Also rising from the base 5 is a plurality of relatively short circularly arranged posts 8 spaced from each other and forming a cup or holder adapted to receive an armature 9 in upright position within the holder. The center of the base is formed with a recess I 0 adapted to receive the lower end of the shaft I I of the armature.

To the upper end of the shaft II is secured the fan I2 and bearings I3, the fan being slightly spaced from the adjacent end of the armature.

The upper ends of the posts 6 are formed with vertically extending slots I4 adapted for freely receiving the laterally projecting pins or trunnions I5 formed at the opposite sides of a cross-bar I6, the pins or trunnions I5 being adapted for vertical movement in the slots.

The outer ends of the bar I6 are bifurcated as indicated at H, and within which is received the reduced upper end I8 of a lifting arm I9, one of the arms being pivotally mounted at each end of the bar I6 by means of the screws 20.

The arms I9 are of substantially L-shaped formation with the vertical portions of the arms extending downwardly outside of each of the pairs of posts 6 and the horizontal portions of the arms projecting inwardly between each pair of the posts and having shallow notches 2| formed at their inner ends for bearing against the shaft II under the fan I2, as will be apparent from an inspection of Figure 1 of the drawing.

The cross-bar I6 is formed with a central threaded opening 22 adapted for threadedly receiving a screw 23 having its lower end tapered and received in a recess in the upper end of the shaft II.

'The upper end of the screw 23 is formed with a head 24 having an opening extending horizontally therethrough for slidably receiving a manually operated bar 25.

In the operation of the device with the lower ends of the lifting arms I9 positioned under the fan I2 in the manner as indicated in Figure l of the drawing, the rotation of the screw 23 in a direction to move the cross-bar I6 upwardly will exert a pulling force on the arms I9 whereby to lift the fan I2 and slide the same off of the upper end of the shaft II.

At the same time the armature 9 and shaft II are firmly held in an upright position within the cup or holder formed by the posts 8 so as to prevent tilting of the armature during the pulling action and thus permit uniform lifting force to be exerted on the underside of the fan by the arms 19.

It is believed that the details of construction and manner of use of the device will be readily understood from the foregoing without further detailed explanation.

Having thus described the invention,

claim is:

what I In an armature fan puller, a base, posts arising p from said base in opposed pairs with vertically slotted upper ends, a bar extending horizontally between the posts of the pairs, lateral trunnion s on opposite sides of said bar slidably vertically in said slots whereby the bar is verticallymovable between said posts of the pairs and guided in its vertical movement, a pair of lifting arms depending from opposite ends of'said bar, said arms being L -shaped to provide lower ends extending toward each other and being pivoted at the upper ends thereof to said bar for swinging thereon whereby said lower ends are adapted to be swung toward each other to position the same under a fan on an armature shaft and against opposite sides of the shaft, and a hand screw threaded through said bar in the center thereof to extend downwardly therefrom whereby said screw may be positioned against said armature shaft and turned to feed said bar upwardly thereon and thereby pull the fan ofi said shaft.

SHAW ORILEY.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,239,420 Melia Sept. 4, 1917 1,666,847 Cote Apr. 17, 1928 2,046,490 Schuirmann July 7, 1936 975,304 Veno Nov. 8, 1910 1,590,918 Tindell June 29, 1926 1,596,293 Neil Aug. 17, 1926 999,775 Gallagher Aug. 8, 1911 1,504,420 Binkley Aug. 12, 1924 724,818 Crane Apr. 7, 1909 1,640,904 Noble Aug. 30, 1927 2,875,391 Smith May 8, 1945 2,052,304 Kaplan Aug. 25, 1936

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