US2068021A - Bushing extracting and inserting tool - Google Patents

Description

Patented Jan. 19, 1937 UNITED STATES BUSHING EXTRACTING AND INSERTING TOOL Myron A. Hamman, Chicago, Ill.

Application August 7, 1935, Serial No. 35,113

Claims.

The invention relates to improvements in a screw press particularly adapted for extracting and inserting such articles as bearings, bushings, and the like. In this instance, however, the invention contemplates a device or tool with which to perform the above mentioned operations quite readily and effectively by hand.

The invention further contemplates a tool, having the above stated characteristics, being comparatively of light weight but so constructed as to withstand long and hard usage.

It is further contemplated to provide a tool, having the above stated characteristics, which may be constructed of, comparatively, few parts with which to extract and insert various size articles of the above description with the least possible trouble and expense.

The invention further provides a device of the above type which may be manufactured and marketed at, comparatively, a very small cost.

These and other objects of the invention will be better understood by referring to the illustrations of the accompanying drawing, more fully described in the following specification, and more particularly pointed out in the appended claims.

In the illustrations, Figure 1 is, substantially, a longitudinal sectional view showing the improvements embodied inthe invention, and shows a bearing bushing about to be extracted from its place of installation to the position shown in light dotted lines, or after having been inserted in place.

Figure 2 is a similar sectional view of part of the invention shown in Figure 1, and shows the tool in position for inserting a bearing bushing; and,

Figure 3 is a sectional view, on a smaller scale, taken on the plane 33, of Figure 1.

Similar characters refer to similar parts throughout the several views.

To illustrate the invention I have shown on the drawing a jack screw holder or screw threaded nut 50, the same being, preferably, hexagonal in cross section, and having screw threads H, formed partially therethrough, the same being adapted to receive corresponding screw threads H, of a forcing member or jack screw 12. The screw I 2, is provided with a suitable bore l2, through which a draw bar or pull rod I4, is guided. Through a wall 19, formed at one end of holder I9, is formed, in this instance, a square opening 13, through which is workably fitted a square portion 14', of rod M; the rod l4, being turned round, as at l5, and provided with screw threads 16, over which is fitted'a double shouldered reversible adapter l1, having both itsends tapped with screw threads ll, to correspond with those formed on rod M. The adapter I1,

is adapted to engage a bearing bushing I3, for 5 either its removal or insertion, substantially as shown in Figures 1 and 2. 7

At the end IQ, of holder i0, is provided a counterbore 20, into which is snugly fitted a tubular thrust member 2!, the same being adapted to 10 receive an ejected bearing as indicated by-light dotted lines in Figure 1.

Referring to Figure 1, it will be seen that jack screw 52, is provided with an enlarged portion or head 22, the same being provided with a counterbore 23, which is adapted to receive a suitable thrust bearing 24. The thrust bearing 24, is adapted to fit over rod I4, and between the bottom of counterbore 23, and the shoulder formed by the enlarged portion or head 25, provided on the end of rod M, as indicated in Figure 1. Radially out from head 22, and in opposite relation to each other, are arranged a pair of lever arms 26.

On desiring to remove a bushing or bearing 5 from its place of installation or bearing hub 21, rod l4, minus adapter I1, is inserted through the bushing i 8, to the extent that member 2|, engages the face of hub 21, and to the extent that portion 16, of rod It, extends out beyond the bushing as shown. The partsbeing in the position stated adapter H, may now be threaded over portion IE, to the extent that it snugly engages and firmly clamps bearing and hub and part 2!, together, whence the whole, that is the 5 tool, together with the part upon which hub 27, is formed, may be placed in a vice and there securely held between vice-jaws, being indicated by light dotted lines 28, as shown in both Figures 1 and 2. 4

The tool being in the position stated, and the several parts being arranged as described, the bushing 18, may be readily withdrawn or ejected from its secured position simply by unscrewing jack-screw 12, from its holder ID, the operation of which, by means of levers 26, engages the head 25, of rod '14, through the medium of thrust bearing 24, thereby forcing rod M, to draw adapter I 1, against the bushing forcing the same out from its bore to the position shown by light dotted lines in Figure 1.

It may be stated, that owing to the fact that rod I4, is square, and is guided through a corresponding square opening [3, in holder II), it will not turn when ejecting or inserting a bushing,

therefore, there is no danger of adapter H, being deranged while performing the operation of removing or inserting a bushing.

It may be further stated, that the operation of inserting a bushing is substantially identical with that of removing or ejecting a bushing.

Having thus described the invention it can be readily understood that the minor details of its construction may be altered in several ways without departing from the spirit and scope of the invention, and without losing any of its attendant advantages. Therefore, what is claimed is desired to be secured by Letters Patent.

I claim:

1. In a tool, of the character described, a jackscrew holder, a jack screw workable through said holder, a square draw rod or spline operable by means of said screw and slidably mounted in a central corresponding square opening provided in said holder, a bushing ejecting or inserting reversible adapter detachably securable to one or free end of said rod, a thrust member carried by said holder, a thrust bearing interposed be tween said screw and a shoulder formed on one end of said rod, and jack-screw operating handles suitably fastened in said screw.

2. In a tool, of the character described, a jackscrew holder, a jack-screw workable through said holder, a square rod for extracting or inserting bearing bushings and the like slidably mounted for longitudinal movement through said holder, said rod having a shoulder formed at one of its ends and the opposite end thereof being provided with screw threads, a thrust bearing interposed between said shoulder and the said jack-screw, a reversible or double-ended bushing ejecting or inserting adapter having its opposite ends tapped to receive the screw threaded end of said rod, and operating handles or levers secured in said jack-screw.

3. A tool, of the character described, having a draw bar and a jack-screw for operating said bar, said bar being formed square, one end thereof being turned round and having screw threads formed thereon, the opposite end being enlarged to form a head providing a shoulder, a thrust bearing arranged over said bar intermediate said shoulder and the said jack-screw,

said screw being adapted to workably fit over the square portion of said bar and form a bearing therefor, a holder or mounting having a screw threaded bore, said screw being adapted to workably fit said bore, and a square opening formed in said holder, the said opening being adapted to form a guide or key-way through which'the square portion of said bar may slide and be prevented from turning.

4. A tool, of the character described, having a jack-screw and a holder in which to operate said screw, a wall formed in one end of the holder having an axial square opening formed there-through, said screw having a concentric circular bore formed there-through, said screw being enlarged at one end to form a head portion, a counter-bore formed in said portion concentric to said bore the bottom of which forming a shoulder, a thrust bearing adapted to fit in said counter-bore and against said shoulder, a square draw bar having a shoulder formed at its one end adapted to fit against said bearing, the said bar being adapted to slidably operate through said square opening, said circular bore being adapted to workably fit said draw bar, and hand levers suitably secured in said head portion.

5. A tool, of the character described, having a jack-screw holder, said holder being provided with a screw-threaded bore, a jack-screw adapted to workably fit the screw threads of said bore, said jack-screw having a counter-bore formed concentrically in its outer end the bot tom of the counter-bore forming a shoulder, a wall formed in said holder, said Wall having a square opening formed axially there-through, a concentric counter-bore formed in the end of said holder, said counter-bore being adapted to receive a tubular thrust member, said square opening being adapted to form a guide for the square portion of a draw-bar movably mounted therein, a draw-bar having a portion thereof formed square the same being adapted to slidably fit said square opening, an enlargement formed on one end of said bar providing a shoulder, and a thrust bearing loosely mounted over said bar intermediate the said shoulders.

MYRON A. HAMMAN.

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