US1710952A - Device for babbitting engine crank-shaft bearings - Google Patents

Description

April 30, 1929. H. c. SHOEMAKER ,9

DEVICE FOR BABBITTING ENGINE CRANK SHAFT BEARINGS Filed Au :50. 1926 Patented Apr. 30, 1929.

UNITED STATES HARRY C. SHOEMAKER, OF FREEIPORT, ILLINOIS.

DEVICE FOR BABBITTING ENGINE CRANK SHAFT BEARTNGS.

Application filed August 30, 1926. Serial No. 132,463.

This invention relates to a novel device for 'babbitting engine crankshaft bearings and is principally concerned with the provision of a portable device of this kind adapted for application on engine blocks for the quick and accurate babbitting of the bearings.

One of the objects of the invention is to provide a mandrel to be positioned in axial alignment with the bearings and provided with pouring openings therethrough where by the molten bearing metal may be poured directly through the mandrel into the bearings, the said mandrel being also provided with means for rotating the same when the bearing metal'is about to become set; so that the slugs of excess metal in the pouring openings are sheared ofi'.

Another object consists in-the provision of pouring openings for the purpose referred to of a particularly advantageous -form facilitating the matter of pouring the metal, the matter of cutting off the nih or slug of excess metal, and also the matter of removing the slug after the pouring operation is completed.

The invention is illustrated in the accompanying drawing whereinp Fig. 1 is a bottom side plan view of an engine block with the crank case removed and also having the crank shaft and bearing caps replaced by the novel bearing babbitting device of my invention;

Fig. 2 is a longitudinal section taken on the line 22 of Fig. lshowing the mandrel in elevation except for one end portion thereof; and

Fig. 3 is a transverse section taken on the broken line 3-3 of Fig. 1 looking in the direction of the arrows.

The same reference numerals are applied to corresponding parts in the three views.

The engine block designated by the numeral 5 has crankshaft hearings at G, 7 and 8, respectively, provided in the end walls and in an intermediate Wall or Web portion in the conventional manner. The engine block is removed from the car and inverted, as shown in Fig. 3, for the rebabbitting ot the crank shaft bearings. According to my invention I provide a portable device compristing supporting frame pieces 9 and 10 having bearings 11 and 12 for receiving a rotatable mandrel 13. The frame pieces 9 and 10 have pad portions 14 provided with dowel pins 155 to enter halt holes 16 on the bottom flange at the engine hitch. llin way, the bearings 11 and 12 are placed in axial alignmentwith the bearings 6,7 and 8 and consequently the mandrel 18 is also axially aligned therewith. The mandrel 13 is milled out to provide pouring openings 17 elongated in the direction of the axis of themandrel. The end walls of the hearings as appears in Fig. 1 so that molten metal properly reaches all parts of the bearings in the pouring operation. The form of the pouring openingafiords a Wide month end facilitating the pouring considerably. At the same time the discharge end is rela-. tively narrow and it is, therefore, a simple matter to shear off the slug 22 of excess metal in the pouring opening after the pouringoporation. The mandrel is provided with han dles 23 for the purpose of giving it a quick turn just as the Babbitt metal is about to take a set. The slug 22 is thereby neatly cut off and later when the mandrel is removed from the engine block the slugs in the three pouring openings will be easily extricated or may drop out. This is due particularly to the fact that the side walls of the pouring openings diverge outwardly on all sides.

The mandrel is equipped with split collars 2 1 having a. tight but movable fit thereon to be moved up against opposite ends of the hearings 6, 7 and 8, so as properly to mold the ends of the hearings in the pouring operation. These collars are provided with fillet portions 25 to round out the ends of the hearings in the manner shown in Fig. 2. The rounded out ends of the bearings are to properly accommodate the fillet portions occurring at the ends of the bearing pins of'the crank shaft. The crank shaft will, thereforeprun true in the newly babbitted bearings. A further provision is made on one collar 24 of an annular recess 26 adjacent the fillet portion 25 so as to form aflange or extension 27 on the end of the bearing 6 to provide an end thrust hearing for thecrank shaft. It is a common practice to provide an end thrustbearing at the fly wheel and of the engine block to as was the nid play of the anal alien incpem ation. In the pouring of the metal, blocks 28 are laid in position over the upper edge of the bearing cavity and against the pouring mandrel to retain the bearing metal While pouring and also to give the edges of the bearing a finished surface Without necessitating a separate filing operation. It will be obvious that due to the manner of pouring the metal any dross or slag Will be carried to the vicinity of the blocks 28 or will collect toward the top of the metal in the pouring opening but that the most solid bearing material will be confined to the middle of the bearing cavity Where the greatest load is assumed in the operation of the engine.

From the foregoing description it will appear that I have provided a very handy and practical device for the punpose mentioned and that the same (JOH'IPIlSGS very few parts of a simple and economical construction. The minor adjustments required in the applica tion of the device to an engine block for the rehab-hitting of the crank shaft bearings thereof require very little time and can be performed by persons possessing no more than ordinary mechanical skill. The actual zpouring operation, by virtue of the present im" provements, is also made an easy n'iatter to perform anda Workmanlike job is positively insured.

I claim:

1. In a device of the character described, supports arranged to be mounted on an engine block and providing bearings arranged to be disposed in alignment with the crank shaft bearings of the engine block, and a mandrel rotatably mounted in said supporting bearings to be thereby placed in alignment With said crank shaft bearings, said mandrel having a pouring opening therein to be disposed adjacent one of the engine crank shaft bearings for the pouring of B abbitt metal through said opening into said bearing, the rotation of said mandrel serving to shear oil the Babbitt sprue formed in the molding operation.

2. In a device of the character described, supports arranged to be mounted on an engine block and providing bearings arranged to be disposed in alignment with the crank shaft bearings of the engine block, and a mandrel rotatably mounted in said supporting bearings to be thereby placed in alignment With said crank shaft bearings, said mandrel having a pouring opening therein to be disposed adjacent one of the engine crank shaft bearin gs for the pouring of Babbitt metal through said opening into said bearing, and said opening being narrow and elongated in the direction of the axis of said mandrel and providing a discharge port extending the major portion of the length of the engine crank shaft bearing, the elongation of the port insuring unrestrictedflow of the molten Babbittmetal to all parts of the bearing and the narrowness of the port facilitating theshearing off of the Babbitt slug in the turning of the mandrel. following the molding operation.

3. In a device of the character described, supports arranged to be mounted on an engine block and providing bearings arranged to be disposed in alignl'nent with the crank shaft bearings of the engine block, and a mandrel rotatably mounted in said supporting hearings to be thereby placed in alignment with said crank shaft hearings, shid mandrel having a pouring opening therein to be disposed adjacent one of the engine crank shaft bearings, for the pouring otf Babbitt metal through said opening into said bearing, said opening providing a narrow discharge port whereby to facilitate the cutting oil of the nib of excess metal in the pouring opening by the turning of said mandrel upon the completion of the pouring operation.

at. In a device of the character described, supports arranged to be mounted on an engine block and providing bearings arranged to be disposed in alignment with the crank shaft bearings of the engine block, and a mandrel rotatably mounted in said SUPPUl'hlIlg hearings to be thereby placed in alignn'ient with said crank shaft bearings, said mandrel having a pouring opening therein to be disposed adjacent one of the engine crank shaft bearings for the pouring of Babbitt metal through said opening into said bearing, the turning of said mandrel after the pouring operation serving to cut oil the slug of excess metal left in the pouring opening, and said opening being tapered in form from a Wide mouth portion to a narrow discharge portion substantially as and for the purposes described.

5. The combination in a bearing babbitting device of a mandrel, means for supporting said mandrel in axially aligned relation to a bearing, said mandrel having an opening therethrough leading into the bearing Whereby molten bearing material may be poured into said bearing, and means for turning said mandrel whereby to cut oil the slug of excess metal left in the pouring opening after the pouring operation.

6; The combination in a bearing babbitting device of a mandrel, means for supporting said mandrel in axially aligned relation to a bearing, said mandrel having an opening therethrough leading into the bearing where by molten bearing material may be poured into said bearing, and means for turning said mandrel, said opening having the walls thereof diverging outwardly on all sides thereof from the discharge end thereof toward the pouring end whereby to facilitate the removal of the slug of excess metal left in said opening after the pouring operation.

7. The combination in a bearing babbitting device of a mandrel, means for supporting said mandrel in axially aligned relation to a bearing, said mandrel having an opening therethrough leading into the bearing whereby molten bearing material may be poured into said bearing, and means for turning said mandrel, said opening being milled on a radius producing side walls converging toward the discharge end of said opening, and end walls arcuate in form converging toward the discharge end of said opening.

8. The combination in a bearing babbitting device of a mandrel, means for supporting the same in axially aligned relation to a hear ing, said mandrel having an opening therethrough leading into the bearing whereby molten bearing material may be poured into said bearing, and means for turning said mandrel, said opening having opposed walls thereof divergingoutwardly from the discharge end thereof toward the pouring end whereby to facilitate the removal of the slug of excess metal left in said opening after the pouring operation.

9. The combination in a bearing babbitting device of a mandrel, means for supporting said mandrel in axially aligned relation to a bearing, said mandrel having an opening therethrough leading into the bearing whereby molten bearing material may be poured trough of said bearings whereby Babbitt metal in flowing about the same and hardening is arranged to form the bearings,'means for supporting said member in axlal alignment with the hearings to be babbitted, said member having a pouring opening extending therethrough substantially centrally thereof whereby molten Babbitt metal may be poured through said member into the middle of the bearings, the slug of excess and dross containing metal being left in the pouring opening after the pouring operation, and means arranged to be operated after the pouring operation to cut oil the slug.

In witness of nature.

HARRY C. SHOEMAKER.

the foregoing affix my sig-

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