US1838894A - Reamer bar supporting bracket - Google Patents

Description

Dec. 29, 1931. w s o REAMER BAR SUPPORTING BRACKET Filed June 27, 1927 2 Sheets-Sheet 1 Dec. 29, 1931. R. WISHON REAMER BAR SUPPORTING BRACKET Filed June 27, 1927 2 Sheets-Sheet 2 Patented Dec. 29, 1931 l r r s i UNITED STATES T HWI RALPH wrsnon, OF cnIcAoo; ILLINOIS, ASSIGNOR TD. one minor columnar, a con;

V romrxonor rrmnols V nnAMER BAR 'surronrine BRACKET Application filed June 27, 1927; 'Serial No. 201 75)! This invention relates to :a reamer bar :suption'al' view taken on line- VIIVII of Figportingbracket. V r ure5. l I a It isan object of this invention to pro- Figure 8 is: a transverse sectional View vide a reamer bar supporting braoketadaptthrough a-cra'nk: case illustrating the device 5 ed' tobe clamped to a crank case or the like in position for reaming a camshaft bearing.

and provided with an arm adjustable. as to .As'shown on the drawings? length and angular relation and carrying a The reference numeral 1 indicates as aselTf-alignihg bearing forlaligningthe reamer whole a crank case ofthe type to be found in: bar with'a main crankshaft bearing or :caminternal combustion engines. in order to shaft bearing to be reamed." ream -out the main crankshaft bearings 01'' It is a further object of this invention to the cam-shaft bearings, the crank case 1 is provide a reamer bar suppo'rting bracket that supported in inverted position and a-"plus maybe readily secured at any place along its ra'lity of reamer :bar supporting brackets :2 length to a crank case or the like and thatloi my invention are secured to the bottom 15 Icarries a self-aligning hearing which, after flange 3 thereof, transversely "of thenalength alignment with the bearings to :be reamed, of the crankcase; 7

may be olamped in that position without dis- Eachof the reamer bar supporting brackets j turbing the alignment. I 2 comprises a pair oi bars 4 identicalli n'form Other and further important objects of and spaced apart by means of spaoingbush zothis invention will become apparent tromthe ings 5 through .which extend clamping disclosures in the following description and bolts 6. Said bars 4 are :of sufiicient length appendedc'l-aim;' to extend beyond the sides of the crank In the accompanyi g drawings which case 1 and are secured to the flanges 3 illustrate a preferred embodiment of this inof said crankcase 1 by means of bolts 7 ex- 25 vention and in which similar reference n:utendingbetween the bars-{l and through apermorals refer oo-similar features in the d ifiertunes 8 in the flanges 3. Washers 9 are pro-' ent views: vided on the'upper ends of the bolts '7 to Figure 1 is a top plan view of an inverted form a-bearing against the upper faces of crank oaseillus'trating the use of devices emthe bars bodying the principles of my'inventionin Each of said lleamerdbail ppo reaming the main crankshaft bearings. brackets 2 i fi m fi h f fl g d.

Figure 2 is a sectional view taken on line Portion 1 havlng a seml'cylmdrlcal Tecesfi H41 Figure with in 61mmthat ii: iii? iiiiii iiiii'eiiinggi i Flgure 3 1S sectlonalvlew aken on lime An adjustable split arm 13is positioned betvveenthe enlarged portions 10 of the bars at and for thispurpose is provided with an elongated slot 14 for receiving a clamping bolt'15 extending through said enlarged por tions 10. Said arm 13, which is thus -adju st-' 3 111411 of Figure 1.

Figure 4 is an enlarged sectional view taken on line IV-IV'of Figurec3, with parts in elevation and-parts removed. a

Figure 5 is an enlarged sectional view W 011-11119 F 125 e Wlth Parts able as to length and angular relation with 111 l i V respect to the "bars' l, carries at its lower end lg re 6 56617101131 View taken on 11116 a zself ali-gning bearinglfi. Said bearing 16 VI+VI of Figure, 5, with partsinelevationis formed with spherical faces 17 (Figure 7);

45 j Figure 7 isv an enlarged ifragmentary :secclampingly held between the concave spher'ical faces 18 of the split arm 13 so as to permit the bearing to be self-aligning. A bore 19 of sufiicient size to serve as a guide for a reamer bar 20 extends through said bearing 16.

As shown in Figures 1 to 6 inclusive, a plurality of reamer bar supporting brackets 2 are secured to the lower flanges 3 of the crank case 1 with the recesses 11 in substantial alignment with the main crankshaft bearings 12. A larger bracket 25 is mounted at one end of said crankshaft to provide an external bearing for the reamer bar 20. The bolts 15 are then loosened. to permit adjustment of the arms 13 until the bearings 16 are brought into substantial alignment with the main bearings 12. A reamer bar 14 is then inserted through the main bearings 12 and the self-aligning bearings 16 carried said arms 13. Temporary bushings are placed in the main bearing supports 21 and the reamer bar 20 aligned therein. The bolts 15 are then tightened in a direction parallel to the reamer bar to tightly clamp the arms 18 in the correct position. The temporary bushings and reamer bar 20 are removed and the bearing linings 22 to be reamed secured in place upon the bearing supports 21. The reamer bar 20 is then fitted with adjustable reamers 23, such as described in my copending application entitled, Adjustable reamer, Serial No. 201,757, filed June 27, 1927, and the bar 20 inserted in position in the bearings 16. Said bearings 16 being selfaligning, will automatically center the reamer bar 20 in the correct position for reaming the main bearings 12. The blades of the adjustable reamers 23 are expanded as disclosed in my application above referred to and the reaming process carried out by rotating the reamer bar 20.

It will be apparent that the reamer bar supporting brackets of my invention are thus readily adjustable to any size of crank case and that the self-aligning bearings 16 provide accurate self-centering means for the reamer carrying pilot bar. Since the bolts 15 extend at right angles to the said arms 13, there is no possibility of the bearings 16 getting out of alignment with the main crankshaft bearings 12 after the preliminary alignment during the final clamping operation. a

In Figure 8 there is illustrated a reamer bar supporting bracket 2 with the adjustable arm 13 positioned for reaming a camshaft bearing 24;. This adjustment may be effected without changing the position of the reamer bar 2, simply by loosening the bolt 15 and sliding the arm 13 into the desired angular position with respect to the reamer bar supporting bracket 2. The bolt is then tightened when the bearing 16 is in alignment with the camshaft bearing 24. The simplicity of the device and the ease with which. it may be manipulated will be appreciated by those familiar with the reaming of crankshaft and camshaft bearin s. Obviously, my device may be employe wherever bearings are to be reamed, but, for purposes of illustration, the operation has been described in connec tion with the reaming of crankshaft and camshaft bearings of internal combustion engines.

The operation of the device is as follows:

The bearings to be reamed are exposed by removing the usual bushings and temporary bushings of proper size are inserted in the bearings for aiding in aligning the reamer bar. The brackets are then secured to the crank case, the single attaching means for the several arms are loosened and the reamer bar inserted in the universal self-aligning bearings 19 in the arms 13. The bar is then properly aligned with respect to the bushings and all of the single fastening means for the several adjusting arms tightened. This results in perfectalignment of the reamer bar in the floating universal bearings in the several bearing arms, which alignment remains fixed and uniform until the reaming operation is completed. The temporary bushings are then removed and the reamer bar then rotated to ream the bearings in the crank case so that when reamed properly new bushings may be installed with the assurance that the crank shaft will thereafter be properly aligned in such bearings and bushings.

It is to be observed that the mechanism of the present invention enables quick and positive adjustment of the several bearing arms so that all danger of boring bar cramping or springing iseliminated. Furthermore, every one of the universal bearing arms is secured to its bracket by a single fastening means, thereby allowing quick, easy, and certain adjustment of such arms.

The apparatus of the present invention requires little skill to properly set up for reaming, is extremely accurate and mechanically correct. The provision of the floating universal self-aligning hearings in the several arms assures at all times that the reamer or boring bar is properly aligned with respect to the bearing surfaces to be reamed; furthermore, the bar is supported so as to secure uniform, even, and accurate results.

I am aware that many changes may be made in the construction of my device without departing from the principles of this invention and I therefore, do not purpose to limit the patent granted hereon, otherwise than necessitated by the prior art.

I claim as my invention:

A reamer bar support comprising a brackct, an arm connected to said bracket at the central portion thereof and arranged for longitudinal and angular adjustment about its connection, a bolt passing through said bracket and said arm for adjustably positioning said armon sa-id bracket, a universal bearing in one end of said arm, said bearing including a block having a spherical surface, said arm being split in a plane parallel to the sides of the arm, the split portions having concave recesses which together receive and retain said block in position when said parts are secured together to permit univerm sal movement of said block Within said recesses, and said block having an aperture for a reamer bar. i

In testimony whereof I have hereunto subscribed my name at Chicago, Cook County,

Illinois.

RALPH VVISHON.

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