US1763917A

US1763917A - Reaming tool for connecting rods

Info

Publication number: US1763917A
Application number: US137329A
Authority: US
Inventors: Aab William
Original assignee: Individual
Current assignee: Individual
Priority date: 1926-09-23
Filing date: 1926-09-23
Publication date: 1930-06-17
Anticipated expiration: 1947-06-17

Description

June 17, 1930. W. AAB 1,763,917

REAMING TOOL FOR CONNECTING RODS Filed Sept. 25, 1926 Patented June 17, 1930 f Y stares .err assist WILLIAIVI AAB, OF NEW ULM, MINNESOTA REAMING TOOL FOR CONNECTING RODS Application led September 23, 1926. Serial No. 137,329.

This invention relatesto a tool con-struct- Fig. 2 is a vertical section taken on the ed and arranged to facilitate the reaming line 2-2 of Fig, l, as indicated by the aroperations in the bores of connecting rod rows; bushings, or similar articles. Such connect- Fig. 3 is a Vertical section taken en the 5 ing rods are now used in large numbers in line 3--3 of Fig. 2, as indicated by the arautomobiles. It is frequently necessary to rows; l renew the bushing in the connecting rods Fig. 4 is a vertical section taken on the which embraces the wrist pin and ream the line lf-4 of Fig. 2, as indicated by the arsame. Diliculty has been experienced in rows;

l0 properly finishing the bore of the bushing Fig. 5 is a plan detail view of ene of the 160 especially by inexperienced. workmen, and parts used; the bore is frequently made larger at its Fig. 6 is a plan detail view of another ends, owing to the fact that the reamer is of the parts of the device; and tilted and is not passed through the bore Fig. 7 is apartial View similar to Fig. 3,

15 co-aXially therewith. showing the parts in locating position. .65

It is an object of this invention, therefore, Referring to the drawings, a connecting to provide means constructed and arranged rod 10 is shown in Fig. 1, such as now com to properly guide the reanier and center the monly used on automobile or internal comsame while the bore of the bushing in the bustion engines. In Fig. 3 the connecting 20 connecting rod is being finished. rod 10 is shown as clamped between the jaws 70 It is a further object of the invention 11 and 12 of a vise, the connecting rod being to provide means for centering and guiding so held when the reaming operation is perthe reamer comprising a member adapted formed. The connecting rod 10 has a hub to engage and be clamped to the connecting 10a at one end which is bored and reamed rod having another member attached thereto embrace the usual pistonI pin in the pis- 75 te and relatively movable thereto carrying ton of the engine cylinder.V

a centering means for the reainer, which In accordance with the present invention, latter member is adapted to be properly ada tool is provided comprising a member 15 justed and held in adjusted centering posipreferably formed as a casting, which mem- 30 tion. ber has spaced jaw portions 15a at one end, 8o

It is still another object of the invention each of which has one fiat jaw surface 15b to provide a member engaging and clampdisposed substantially at right angles to the ing the connecting rod including clamping longitudinal axis of the-member 15 and'havjaws and having a flat surface at one end ing another jaw surface 15c disposed at an engaged by a fiat plate which is longitudiacute angle to the surface 15b. The mem- 85 nally and laterally movable on said member ber 15 has, at its end opposite the jaw 15, and adapted to receive a centering means for a fiat surface 15d formed on a pair of lugs the reamer, together with; means for hold- 15e. The central'portion of the member 15 ing said plate in properly adjusted position. is formed as a web having thickened por- These and other objects and advantages tions 15f at the sides thereof, as clearly J0 of the invention will be fully set forth in shown in Fig. 3. The member 15 also has the following description made in connecprojecting from one .side thereof, spaced tion with the accompanying drawings in lugs 15g between which lugs is pivoted a which like characters refer to the different member 16 by means of the pivot 1.6c shown parts throughout the different views, and as riveted in place. The member 16 is formed 95 in which, as a jaw at its outer end, which end alrnes Fig. 1 is a plan view of the device showlaterally with the jaw portions 15a, which jaw ing a connecting rod and reamer in connec-v has a surface 16a which, when in clamping tion therewith, together with a vise in which position, extends at an angle slightly less o the connecting rod is held; than a right angle to the surface 15", as [..31'1

shown in Fig. 2. The member 16 has pivoted thereto, intermediate its ends, a small U-shaped yoke member 17 having secured in the bight portion thereof, one end of a screw 18, which jaw extends toward the member 15 and extends through an aperture 15h in the web of member 15. The free end of the jaw is engaged in a threaded bore in the end of a clamping member 19 illustrated as a cylindrical rod having a handle rod 19a extending at right angles therethrough adjacent its outer end. A plate 20 is provided illustrated as having flat surfaces and being of substantially uniform thickness, which plate 'has a slot 2()a extending longitudinally from one end :and :terminating in :a circular enlargement 20D. Saidplate has an offset circular portion 4at. one vend having a circular aperture 2OC lex- -tending therethrough. A pair Vof headed screws 21 extend through the plate 20 and the slot 20a and are threaded into the lugs 1.58, washers 22 .being disposed beneath the heads of screws 21. A compression spring 23 is disposed lbetween the

members

15 and 16 between lugs 15g and yoke 17,'th1eends ofwhich embrace small pinsy or `projections 16b and 15i, respectively., which project from

members

15 and 16, respectively, :these pins or projectionsacting to hold said sprin in place. A centering member or cone 211 is provided which, as shown :in Figs. 3 and 7, comprises a -member having oppositely tending frusto-conical end portions having therebetween, a cylindrical portion 211a of enlarged diameter' having its periphery knnrled. rThe member 211 is divided .along a fdiametral iplane `and hinged :at onef'side softhat it may be readily opened and closed. An adjustable reamerr25 .is shown, 7and while any adjustable reamer may :be used, in the embodiment of Ithe invention illustrated, a

Yreainer .is `shown having a threaded cylindrical lend 'portion251 and an intermediate portion having longitudinally extending grooves T25b therein. The grooves 251D are adapted to receive reamer blades 25C :and these blades may be moved longitudinally` to increase or decrease `the diameter of circle engaging their outer surfaces by being moved longitudinally in fthegrooyes 25b by the collars 25d `which receive the `ends vof said 'blades and are moved'longitudinally by the rnuts 25e. The :bottoms of the grooves 25b are Yinclined Lto the `axis of vthe reainer so fthat the sblades'are cainmed outwardly by said grooves, 'it being understood that the reainer 'is'also threaded throughout the poi'- tion occupied 'by the grooves .2511.

When `the bore of fthe connecting rod hub is ito 'be resumed, `the connecting rod will be placed 'in Vand clamped in some holding means, :such as the jaws l'l'and 12 of a vise, as illustrated. The tool of thek present invention will then be engaged with and clamped on the connecting rod, as shown in Figs. 1 and 2. It will be seen that, owing to this position of the

jaw surfaces

15 and 16, the connecting rod 10 will be clamped surface 15b. The connecting rod is thus held with the axis of the hub 10'JL and the bore therein substantially parallel with the longitudinal central axis of the member 15; The reamer .25 is now placed in position, as shown in Fig. 7, with the blades 25c substantially longitudinally centered .in the -hub 10, said blades being adjusted so that the reanier fits snugly in the ibore of h-iib 10a.

he reamer, at lthis time, extends through the aperture 20c Ain .plate 20. The centering cone or shell 211 is now closed about .threaded vend of the reamer25 at .theloiIt-'er side of the platey 20and is then screwed on the reamer toward .the hub 1.0%. 'The icone new centers the laperture 2@c :sort-hat `its 4fcenter is coaxiaL with the reamer. lVhen the plate Y2O is rthus accurately icentered with fthe reainer, the screws 21 Aare'tightened.to 'hold the plate firmly in kposi-tion 'on member 15. will be seen that the plate 26 more longitudinally on member 15 Vand 'can :allso beswiing laterally :about the screws 2.1 nearest the end of `the plate, tlieajierturel20" .permitting this lateral swinging moy-ement. VJ hen the plate is thuslcentered the irerainer is withdrawn from vthe fboreiof v'liiiib 16a :and the `reamer is then adjusted ite the .proper size for reaming out-said bore. Tfhezreanier is then inserted Afinto the bore, fassliowii in Fig. V1, lthe threaded end 4engaging yin the cone 2.11. The Ireanier Yis now turned,as usual, and is' drawn or yfed th-rough `the bore iin the hub 10EL bythe threads athereonlengagi'ng tlie threaded kinterior Jof `thecone c The reamer is thus guided in perfect and accurate alineinent with its axisxco-axial 'withzthe vaxis of the bore and of the 'centering cone211 so that there is no ychance =for 4the freamer :to tilt or move inte position :with its laxis inclined to the axis of 'the A perfect cylindrical bore is thu-s made in the hub 16.

When the vtool 'is to .be Areleased from the aio connecting rod the handle 2O and member 19 Y tween the end of the hub-a cftheiconnecting rod and the plate, thusrallowiiig Yplenty of room for the reamer to move through the bushing or hub l()a without engaging said plate or the centering cone 24. This greater distance is obtained by reversing said plate.

From the above description it is seen that applicant has provided a very simple, convenient and highly efficient device for use in reaming out the bushings in connecting rod hubs. The tool is simple in construction and easily and quickly positioned. The connecting rods can thus be reamed by Workmen who are not experienced machinists and al perfect job will be done. The device has been amply demonstrated in actual practice and found to be very successful and efficient.

It will, of course, be understood that various changes may be made in the form, de-

tails, arrangement and proportions of the parts without departing from the scope of applicants invention which, generally stated, consists of the parts and combinations of parts disclosed and defined in the appended claims.

What is claimed is:

l. A device for use in reaming the bores of bushings in connecting rods or similar devices having in combination, means for engaging and clamping a connecting rod comprising a member having a jaw at one end with one surface extending substantially normal to the longitudinal axis of said member and another surface inclined at an acute angle to said surface, a member pivoted to said member having a jaw at one end with a surface making an angle of slightly less than ninety degrees with said rst mentioned surface, means for moving said jaws to clamp a connecting rod therebetween, said member having a flat surface at its end opposite said jaw, spaced headed screws threaded into said member, a plate engaging said flat surface disposed under the heads of said screws and having a slot therein embracing said screws with an enlargement at one end about one of said screws, said plate having an opening therein at one side of said member, and a centering means positioned in said opening adapted to receive a reamer to position said plate with said opening co-axially alined with the bore of said bushing, said centering means being adapted to guide and feed said reamer.

2. The structure 'set forth in claim 1, means for moving said first two members together to clamp said connecting rod, and a spring for moving said members apart.

3. A device for reaming the bushings of connecting rods or similar devices having in combination, a member having an angular jaw at one end, a jaw pivoted to said member and cooperating with said angular jaw to v clamp the shank of a connecting rod, said member having a flat surface at its opposite end, a plate movable over said surface, means for clamping said plate in xed position on connecting rods or similar devices having in combination, a member having a fixedV jaw at one end, a jaw member pivoted to said member and adapted to cooperate therewith to clamp the shank of a connecting rod, one of said jawsfhaving a flat surface against which the wide side ofthe connectingprod shank engages, said member having lugs at its opposite end having fiat surfaces, screws threaded into said lugs, a plate clamped against said surfaces by said screws and having a slot embracing said screws whereby said plate is longitudinally and laterally movable on said fiat surfaces said plate having an aperture in one end, a centering member receivable in said aperture and being internally threaded to engage the threaded shank of aI reamer whereby said plate can have the aperture therein axially laligned with the aperture in the bore of said connecting rod by loosely inserting the reamer in said bore and having it engaged by said centering means, saidA centering means acting to propel said reamer upon rotation of the latter. n

5. A device for reaming the bushings of connecting rods or similar devices having in combination, a member having a fixed jaw at one end, said jaw having one surface at right angles to its longitudinal axis and having another surface extending at an acute angle thereto, a movable jaw member pivoted to said member and adapted to cooperate with said jaws to clamp the shank of a con necting rod, means for moving said movable jaw member toward said member, said member having at its opposite end a iiat surface parallel to the first mentioned surface of said fixed jaw, a plate slidable over said flat surface, means for clamping said plate in fixed position on said surface, said plate having an aperture therethrough, a centering means receivable in said aperture automatically centerable therein and internally threaded to receive the threaded shank of a reamer which may extend through the bore of said connecting rod, the aperture in said lplate thus being axially aligned with said ore.

6. A device for reaming the bushings of connecting rods or similar devices having in combination, a member having a fixed jaw at one end, a second jaw pivotally connected to said member, one of said jaws having surfaces making an acute angle with each other, means for moving said jaws tdgether to clamp the shank of a connecting rod therebetween, said member havinga surface yat its opposite end, a member `'movablek in engagement with said surface -longitudinally and laterally of Lsaid =connecting rod, said member having an aperture therein yadaptedto be laxially aligned with the ybore of said yconnecting rod, a centering member 4received in said aperture andi automatically 'center able therein, said centering member being internally-.threaded vtoreoeive the threaded shank of a reamer inserted in said bore-whereby said reamerimay'be movedthrough saidbore on rotation'thereot 7. A device -orreaming-a bushing in` the end -of 'a connecting rod of ,fan automobile engine having -vin combination, Va member having at lone fend Vjaws adapted to be clamped to the connecting yrod shank adja- .cent the end ,having the -bore to be reamed, armember at `the other end off said rst mentioned member movable longitudinally 'and laterally :orf the connecting irod, said Alast mentioned Y member having yan 4aperture through -one end, a member internally threaded to vembrace the threaded shank of a reamer and receivable and automatically centerable Y-in saidaperture and adapted 'to receiveand embraee the threaded shank of said reamer When the same is disposed vin the bore of said connecting rod and centered therein, said centering means thus acting vto align .said aperture axially with said bore. In testimony whereof I aHiX my signature.

' WILLIAM AAB.