US2176626A

US2176626A - Bushing remover

Info

Publication number: US2176626A
Application number: US224385A
Authority: US
Inventors: Arthur E Gentry
Original assignee: Individual
Current assignee: Individual
Priority date: 1938-08-11
Filing date: 1938-08-11
Publication date: 1939-10-17
Anticipated expiration: 1956-10-17

Description

' Oct. 17, 1939. I A. E. 'GENYTRY 2,176,626

BUSHING REMOVER Filed Aug. 11, 1938 FIG. 1.'

INIVENTOR.

Ar'fl'lur E E g'i'rj ATTORNEYS.

- Patented Oct. 17, 1939 UNITED STATES PATENT OFFICE ll Claim.

The present invention relates to improvements in bushing removers and the primary object of the invention is to provide a tool which will .split the bushing within the bore of a hollow bearing member.

In re-bushing automobile parts, such as leaf springs, it has been found expensive and otherwise unsatisfactory to keep on hand a large stock -of annular shouldered drivers to fit the various sizes of bushings encountered in this work.

It is, therefore, a further object of the invention to provide a tool which will effectively and economically split bushings of varioussizes in a manner permitting ready removal of the bushings from the machine elements within which they are tightly fitted.-

Another object of the invention is to provide a tool of the character indicated which is low in first cost.

A still further object is to provide a bushing splitter which is provided with duplicate cutting edges so that the tool may be used for a longer period of time without re-sharpening,

Yet another and important object is to provide a bushing cutting tool so constructed as to curl the'cut bushing material within the diameter of a relatively small bushing so as to not impede the travel of the cutter relative thereto;

Other objects and-advantages of the invention will become apparent during the course of the following detailed description, taken in connection with the accompanying drawing, forming a part of this specification, and in which drawing:

Figure 1 is a view, partly in side elevation and g5 partly in vertical section, and showing a bushing being cut by the tool.

Figure 2 is a fragmentary topplan view of the tool.

Figure 3 is an end view of the tool, looking toward the cutter head thereof.

Figure 4 is a fragmentary perspective view of the tool.

In the drawing, which for' the purpose of illustration shows only a preferred embodiment of the invention, and wherein similar reference characters denote corresponding parts throughout the views, in designates a given bearing memberhaving an internal bore ll within which is tightly fitted a cylindrical bushing l2, usually of a soft metal or alloy, such as bronze or light steel. The tool I5 may be formed from round or regular polygonal bar steel, tempered to proper hardness. 5 portion l6 isof regular hexagonal shape in cross- In the present instance, the stem.

section and is beveled at its rearward end I! so as to properly withstand the blows of a hammer (not shown). Extending forwardly of the stem portion i6 is an elongate cutter head portion l8, of oblong rectangular shape in cross section providlng a pair of narrow parallel plane surfaces HQ .and a pair of wide parallel plane surfaces 26.

This cutter head portion is formed integral with the stem as by the forging of a suitable steel bar (not shown) having the diameter and cross-sectional shape desired for the stem portion It, so as to flatten and widen one end portion of the bar to produce the cutter head portion l8.

At its forward end, the cutter head portion terminates in a concave wall surface 2i, formed as by grinding, and bounded by arcuate side edges 22 lying in the planes of the wide surfaces 20, and by straight edgeszt lying in the plane's of the narrow surfaces l9. If desired, the end wall surface 2i may be'so ground as to dispose thestraight edges 23 in symmetrically oblique or skew relation to the transverse minor axis of the cutter head so as to provide angular seam or crevice-entering corners 26. By the term skew relation as applied to the edges 23 is meant that relation in which the edges do not lie in a common plane. 1

To remove the bushing l2 from the bore ll of the bearing member l0, one of the straight edges 23 of the tool is first disposed against a portion of the crevice or juncture 25 at one end of the bushing and bearing member. The stem l6 serves as a handle for retaining the tool in proper position while the end H is hammered to advance the cutter head portion into the bushing mate rial. Attention is invited to the shearing cutting action of the arcuate side edges 22 as the cutter head portion is driven into the bushing, and to the curl 26 imparted to the cut material of the bushing in advance of the concave forward end wall M of the cutter head. The relatively small over-all dimensions of the curl permits removal of bushings of relatively small diameter without impeding the forward movement of the cutting head due to a piling up of cut bushing material in the path of the cutter. Ordinarily the bushing after splitting fora portion of its length will become sufficiently loosened as to be readily removable. 6

Various changes may be made in the form of invention herein shown and described without departing from the spirit of the invention or the I 2 arraeee bore of a hollow bearing member, an elongate cutting head of oblong rectangular shape in crosssection providing a pair of narrow parallel plane surfaces and a pair of wide parallel plane surfaces, said cutting head having a forward 00ncave end surface extending between arcuate side edges lying in the planes of said wide paraliel surfaces and between straight edges lying in the planes of said narrow parallel surfaces, said straight edges being disposed in skew relation to the minor axis of said cutter head and in ske relation to each other.