US1510866A - Bushing remover - Google Patents

Description

Oct. 7, 1924. 1,510,866 A. B. SEPPMANN BUSHING REMOVER Filed April 28. 1923 2 Sheets-Sheet 1 7 7 74 fave? bar I Jlfre 0/15 533077 677177 A. s. SEPPMANN BUSHING REMOVER F iled April 28, 1923 2 Shuts-Shoot 2- 7 r I H5. 3:)

gfiifreaffi. jaw 71107777 Patented Get. 7, 1924.

UNITED STATEd ALFRED B. SEPPMANN, OF LAKE GRYSTALQMINNESOTA.

BUSHING REMOVERQ Application filed April as, 1922. Serial No. 635,303.

To all whom it'mag GOTLGWLl Be it known that I, ALFRED B. Surr- MANN, a citizen of theUnited States, residing at Lake Crystal, in the county of Blue Earth and State of Minnesota, have invented certain new and useful Improvements in Bushing Removers, of which the following is a specification reference being had to the accompanying drawings.

This invention relates to improvements in bushing removers and more particularly to that type of bushing remover having an expansible driving arbor.

is is well known to those familiar with. the presentday mechanical construction, in many of these constructionsbushings are providedwhich are extremely difiicult to remove, due to the fact that the position of the bushing is such that the entrance of a driving arbor for engagement therewith is prevented where the arbor, is of the ordinary construction. An important object of this invention is to provide a driving arbor for use with bushing removers which may be entered through the bushing to be positioned to drive the same, together with a drive member which by its engagement with the arbor. expands the same to provide a I good seat for the seating of the arbor against the bushing to be removed.

A further object of the invention is to provide, a device voit'this character which maybe very cheaply produced and which will'be durable and eflicient in service.

These and other objects I attain by the construction shown in the accompanying drawings, wherein for the purpose of'illus tration is shown a preferred embodiment of myinvention and wherein Figure 1 isa side elevation showing the sections of oneform ot the tool attached;

Figure 2 is a sectional. view showing the tool in use for removing a bushing;

Figure 3 is a similar view showing a new bushing being installed thereby;

Figure 4 is an end elevation of the driving arbor;

Figure 5 is a sectional view showing the driving arbor being entered through the bushing; V Figure Gisaside elevation showing a slight modified form ofthe tool;

Figure 7 is a view showing the tool in use for removing one of the bushings;

Figure 8 is a similar view showing the re moval of the other of the bushings; and

estates eta-rear b rrios.

Figure 9 is an enlarged sectional view 5 showing the end of the driving arbor en-- gaged in the expansible arbor. 1

Referring now more particularly to the drawings, the numeral 5 designates a driving member circular in cross section and reduced, as at 5 for a portion of itslength to the internal. diameter of the bushing with which itis to be employed, thereby producinga shoulder 5 the purpose of which will presently appear. The end o-fthis, reduced portion 5 is provided with an integral conical. projection 6, which is'axial to the drive member 5 and which has its base portion of less diameter than the diameter of the reduced portion 5 thereby providing a shoule. der 6?, for a purpose presently to appear. The numeral 7 indicates a driving arbor, comprising a cylindricalpiece of metal close;

1y approximating in external diameter the internal diameter of the bushing with which itis to be employed and providedat one end with a head 7 the inner end of whioh is of a diameter approximating the external diameter of the bushingwith which the tool is to be employed, the juncture of this end of the head with the arborbody being in the form of an abrupt shoulder 7". The

head 7 is tapered toward the outer end thereof. Through this head a bore 7 is formed which extends into the body a considerable distance and the head and that portion of the body having the bore are subdivided into a plurality of sections by slotting the same, as indicatedatf'Z The slots 7 are preferably two in number and arranged at right angles to one another so that the head and body are divided'into four equal sections andthese slots are of such width as to permit contraction of the head and of the driving arbor 7 sufficiently to admit of. entering of thishead,.into a bushing B to be removed,through the bush I that end thereof which engages the plate 1) with an internal bushing B, access to which is rendered extremely diiiicult tor the reason that the outer end of the tube is formed to provide a reduced squared opening t) preventing the introduction of an arbor of sufficient diameter to firmly engage against the inner end of the bushing B. It will be obvious that this bushing must be removed by driving the same toward the inner end of the tube. In Figure 5 I have shown the manner of entering the arbor 7 in the bushing. This is done by engaging the tapered end of the head against the end of the bushing and tapping the outer end of the arbor with a hammer or some similar tool, with the result that this tapered head in entering the bore forces the sections of (Ill the arbor together so that they will pass through the bushing. Immediately upon their passage through the bushing these sections will expand, so that the shoulder 7 overlies the end of the bushing thus preventing withdrawal of the arbor. The reduced portion 5 of the drive member 5 is then entered through the opening 0 and the end of the conical projection 6 engaged in the bore 7 of the arbor. If a hammer is now applied to the anvil end 5 of the drive member 5, the drive member will enter this bore spreading the sections until the outer face of the inner end of the head is in close proximity to the wall of the bore of the "tube T and accordingly so that the shoulder 7 of the head engages practically the entire surface of the inner end of the bushing. At this time the shoulder 6" of the drive member is engaged against the outer end of the head 7 of the arbor and accordingly a very solid. support is provided for driving the arbor and bushing from the tube. During such driving the engagement of the tapered. end portion 6 of the drive member will pre vent any tendency of the sections of the hot 7 to contract and pass through the bore of the bushing B.

In Figures 7 and $3 I have illustrated another form of bushing which is extremely difficult to withdraw. In this figure I have illustrated the spindle mounting S of the same make of car and which has a bore in the ends of which are disposed bushings B having collars C at their outer ends abutting the outer ends of the spindle mounting about the bore. These collars effectually prevent driving of the bushings through the bore and accordingly they must be removed by internal pressure. The bushing at one end will, of course, prevent the entrance of anything to the bore of ,suiiicient size to en {gage the bushing at the opposite end and accordingly an arbor 7, such as previously described, must be employed. The construction of the tool employed with constructions of this character varies from that previously desc "i tapered projection or tang 6 thereof in the bore of the arbor. This bushing having been renjioved it is of course obvious that the other of the bushings may be readily removedby dropping the arbor 7 through the bore to engage in the bushing when applying the drive member thereto, as indicated in Figure 8. The shoulder 5 of the form of drive member first described serves for replacing bushings, as shown in Figure 3 ot? the drawings 'the bushing being slipped upon the reduced portion 5 of the drive member until it engages the shoulden at which time this shoulder acts as the driving shoulder for forcing the bushing into position into the tube.

It will be obvious that a tool constructed in accordance with the foregoing will render the removal of this type of bushings comparatively simple. In this connection par-- ticular attention is directed to the fact that the head of the arbor is subdivided into a multiplicity of sections at being shown in the present instance. I am aware that con tractile arbors have been provided heretofore, but all of those with which I am familiar simply employ a two-part head. This is imsatisfactory for the reason that it does not permit of a proper contraction of the head and accordingly the head when nandcd will not fully overlie the head of the bushing. Furthermore, bushings are often worn more at. one side than the other and if one section of a two-part head be aligned with the worn part of the bushing this section meets practically no resistance from the bushing and accordingly vis extremely likely to tear through the bushing and cause damage which is extremely ,ditficult to repair, It will. furthermore be obvious that certain changes and modifications in the construction of the device as hereinbefore set forth are possible without in any manner departing from the spirit of my invention and I accordingly do not limit myself to such specific structure except as hereinafter claimed.

I claim 1. A. bushing extractor for bushings located at one end of a double ended bore. the opposite end of the bore being reduced to the diameter of the bore of the bushingand in axial alignment with such bore, comprising a separable arbor and drive member, the arbor beingot an external diameter approximating the internal diameter of the bnshinc ing with which it is to be employed and having a head of an external diameter approximating the external diameter of the bushing with which it is to be employedflthe head end of the arbor having a bore formed therein and being transversely slotted to produce a multiplicity of sections each bearing a portion of the head, the drive member being provided upon its end with a tapered projection adapted to engage in the bore of the arbor to expand the sections thereof, the body of the guide member being of a diameter equal to the diameter of the bore of'the bushing and of a length greater than the length of the bore in which the bushing is mounted.

2. A bushing extractor for bushings located at one end of a double ended bore, the opposite end of the bore being reduced to the diameter of the bore of the bushing and in axial alignment with such bore, comprising a separable arbor and drive member, the arbor being of an external di-. ameter approximating the internal diameter of the bushing with which it is to be employed and having a head of an external diameter approximating the external diameter of the bushing with which it is to be employed, the head end of the arbor having a bore formed therein and'being transversely slotted to produce a multiplicity of sections each bearing a portion of the head, the drive member being provided upon its end with a tapered projection adapted to engage in the bore of the arbor to expand the sections thereof. the attached end of the tapered projection of the drive member being of less diameter than the drive member at the part thereof to which the drive member is attached, the drive member including a portion of the same diameter as the bore of the bushing and of a length equal to the length of the bore in which the bushing is mounted 3, A bushing extractor for bushings located at one end of a double ended bore, the

opposite end of the bore being reduced to the diameter of the bore ofthe bushing and in axial alignment with such bore, comprising a separable arbor and drive member, the arbor being of an external diameter approxi mating the internal diameter of the bushing with whlch it is to be employed and having a head of an external diameter approximating the external diameter of the bushing with which it is to be employed, the head end of jection adapted to engage in the bore of the arbor to expand the sections thereof, the attached end of the tapered projection of the drive member being of less diameter than the drive member at the part thereof to which the drive member is attached, the drive member being of greater diameter than the bushing with which it is to be employed and having a reduced portion of the same diameter as the internal diameter of the bushing, the junction of the reduced portion with the body portion of the drive member providing a shoulder, the reduced portion of the drive member being of a length approximating the length of the bore in which the bushing is mounted.

In testimony whereof I hereunto aflix my signature.

ALFRED B. sEPPMANN.

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