US2060262A

US2060262A - Crankshaft rotating tool

Info

Publication number: US2060262A
Application number: US24073A
Authority: US
Inventors: Daniel S Stouffer
Original assignee: Individual
Current assignee: Individual
Priority date: 1935-05-29
Filing date: 1935-05-29
Publication date: 1936-11-10
Anticipated expiration: 1953-11-10

Description

Nov. 10, 1936. D. s. s'rouFr-ER CRANKSHAFT ROTAIING TOOL Filed May 29, 1935 Patented Nov. l10, 1936 UNHTED STATES PATENT OFFQ 7 Claims.

The invention relates to a crank shaft rotating tool. It has been primarily designed for use upon crank shafts of internal combustion engines, such as for example, automobile engines. In doing various types of repair work, assembly and disassembly of internal combustion engines, there are occasions to rotate the crank shaft into various positions. This is particularly true in doing such work as inserting pistons into the cylinders or removing them, together with their connecting rods.

Heretofore, it has been customary for the mechanic working beneath the engine block to require an assistant to rotate the crank shaft by means of a crank. This not only required the time and work of an additional man but was faulty in that it was difficult to impart the proper instructions to the assistant in properly positioning the crank shaft for the desired purpose.

An object of the present invention is to provide a crank shaft rotating tool which may be applied to a crank pin and/or a crank throw of a crank shaft so as to enable the mechanic working on the engine beneath the block to rotate the crank shaft himself for the desired purpose while working in a position beneath the block. In this way the use of an assistant and the difculties involved in imparting instructions to the assistant in rotating the crank shaft are dispensed with.

Another object of the invention is to provide a crank shaft rotating tool of relatively simple and durable construction and which may be easily and quickly applied to a crank shaft to enable it to be rotated and to enable sufficient leverage to be applied that a mechanic can easily rotate the crank shaft while working beneath the engine block.

Another object of the invention is to provide a crank shaft rotating tool which can be applied to a crank shaft and which will enable proper leverage to be applied thereto which is of such design as to be disposed wholly within the path of the crank pin of the crank shaft so that on turning the crank shaft there is no danger of the tool being moved into such position as to encounter adjacent structure, such as a part of the crank case.

With the foregoing and other objects in view, which will be made manifest in the following detailed description, and specifically pointed out in the appended claims, reference is had to the accompanying drawing for an illustrative embodiment of the invention, wherein:

Fig. 1 is a view in side elevation of a portion of a crank shaft, illustrating the crank shaft rotating tool in applied position thereon.

Fig. 2 is a vertical section taken substantially upon the line 2--2 upon Fig. 1.

Fig. 3 is a view in side elevation of the tool 5 taken in the direction of the arrow 3 upon Fig.

l, parts of the tool being broken away and shown in vertical section.

Fig. 4 is a sectional view taken substantially upon the line 4 4 upon Fig. 3. 10

Referring to the accompanying drawing,

wherein similar reference characters designate similar parts throughout, the improved tool comprises an arcuate body generally designated at I0 having a web II which is peripherally flanged 15 as at I2 and socketed with a plurality of sockets I3. At about the center of the body there is formed a large recess I4 in which the lower ends of jaws I5 and I6 extend. These jaws have their inner faces preferably lined with a softer material, such as Babbitt metal indicated at II, so that when they are applied to a crank pin of the crank shaft they will not scar or mar the crank pin.

A pair of pivot pins I8 and I9 extend trans- 25 versely across recess Ill, the pivot pin I8 extending through an aperture in jaw I6 and through an arcuate slot 20 in jaw I5. Conversely, pivot pin I9 extends through an aperture in jaw I5 and an arcuate slot 2l in jaw I6. Below the pivot pins the jaws extend downwardly into the recesses and each is provided with a lateral extension 22 extending across the recess so that the bottom of each jaw extends entirely across recess Iii. In the bottom of recess Ill there is a 35 threaded aperture for the reception of a threaded screw 23, the top of which is coned and extends between the bottoms of the jaws I5 and I6. Preferably, the bottom edges of the jaws are recessed co-mplementary to the coned top 40 of the screw.

An aperture 241 extends through the body to enable the insertion of a turning rod 25 which may be provided at its upper end with a screw driver end 26 to be inserted into the screw driver 45 slot in the bottom of the screw so that the screw can be rotated by means of the turning rod. On turning the turning rod the screw may be advanced upwardly into engagement with the bottom edges of the jaws and the jaws may be caused to contract in clamping engagement with the crank pin of the crank shaft.

The web I'I is horizontally thickened as indicated at 2l and in this thickened portion there are formed a plurality of rectangular apertures 55 28 on each side of the center of the body.

Small steel bars

29 and 30 are receivable in any of these apertures by being merely caused to slide therein so that these bars project laterally from the side of the body. At their outer ends clamping screws 3l and 32 are threaded therein. The turning rod can be removed from aperture 24 and is receivable in any of the sockets I3, in which case it acts at a turning rod or lever for turning the entire tool as well as the cr-ank shaft. The sockets are preferably arranged in the manner shown on Fig. 3.

When a mechanic has occasion to work on an engine having a crank shaft C and anticipates that during his work he will have occasion to rotatably adjust the crank shaft into any of a number of rotatably adjusted positions, he rst retracts screw 23 into such position as to enable the jaws l5 and I6 to separate and be slipped over the crank pin P. Then, by rot-ating turning rod 25, screw 23 is advanced upwardly to contract the jaws into snug clamping engagement with the crank pin. Just prior to tightening the jaws the tool is rotated about the crank pin as a center until the apertures 28 are opposite both sides of a crank throw T. The jaws are then tightened and

bars

29 and 30 are inserted in the apertures 28 on opposite sides of the crank throw. The clamping screws 3| and 32 are then tightened into engagement with the sides of the crank throw. With the tool thus applied turning effort applied to the tool will not be transmitted entirely to the surface of the crank pin alone but will be largely transmitted through bars 29 and 3S to the sides of the adjacent crank throw. By then using the turning bar 25 as a lever the crank shaft can be rotatably adjusted into any desired position so that the mechanic may properly position it in any position which his work may require. The turning rod 25 can be removed from aperture 24 and inserted in any of the sockets i3 that is most convenient. Preferably, the end of the turning rod is bent laterally as shown and this end is likewise receivable in any of the sockets.

It will be noted that the entire tool when in applied position is disposed entirely within the path circumscribed by crank pin P. Consequently, the crank shaft may be completely rotated without danger of the body of the tool fouling against -adjacent structure, such as a portion of the crank case.

When the

bars

29 and 30 are inserted in apertures 28 it is not necessary to fasten them in the apertures, as tightening of the clamping screws will, by the reactionary forces, cause these bars to be frictionally held or to bind in the apertures. The reason that a plurality of apertures are formed in the body is to enable use of the tool upon crank shafts having various widths of crank throws. And the reason for having the bars slidable in the apertures is to enable transverse adjustments to accommodate themselves to the various crank throws.

From the above described construction, it will be appreciated that a crank shaft rotating tool has been provided which is a relatively simple construction, is durable, and may be easily and quickly applied to a crank shaft to enable its being rotated without danger of scarring or marring any of the bearing surfaces thereon.

Various changes may be made in the details of construction without departing from the spirit or scope of the invention as defined by the appended claims.

I claim:

1. A crank shaft rotating tool comprising a body, a turning bar applicable to the body in any of a plurality of positions and by which the body and a crank shaft to which the body may be applied may be turned, and means on the body for attaching the body to both a crank pin and a crank throw of the crank shaft.

2. A crank shaft rotating tool comprising a body, a turning bar applicable to the body in any of a plurality of peripheral positions and by which the body and a crank shaft to which the bodymay be applied may be turned, jaws pivotally mounted upon the body, means for causing the jaws to clampingly engage a crank pin of the crank shaft, and adjustable means extending laterally from the body engageable with the adjacent crank throw.

3. A crank shaft rotating tool comprising a peripherally socketed arcuate body, jaws pivotally mounted upon the body, means for causing the jaws to contract to clampingly engage a crank pin of a crank shaft, there being transversely extending apertures extending through the body, bars receivable in the apertures so as to project laterally therefrom, means on the bars adapted to engage the sides of a throw adjacent the crank pin, and a turning bar receivable in any of the sockets.

4. A crank shaft rotating tool comprising a peripherally socketed arcuate body, said body having a relatively large recess at about its center, jaws pivotally mounted in the recess, screw means threadedly mounted upon the body engageable with the jaws to contract them into clamping engagement with the crank pin of a crank shaft, a turning bar receivable in any of the sockets, there being transversely extending apertures in the body, bars receivable therein, and means carried by the bars engageable with the sides of a crank throw adjacent the crank pin.

5. A crank shaft rotating tool comprising a peripherally socketed arcuate body, means for attaching the body to a crank pin of a crank shaft, a turning bar receivable in any of the sockets, and means extending laterally from the body engageable with the crank throw adjacent the crank pin.

6. A crank shaft rotating tool comprising a peripherally socketed arcuate body, means for attaching the body to a crank pin of a crank shaft, a turning bar receivable in any of the sockets,'bars adjustably mounted upon the body for adjustment laterally with respect thereto, and means carried by the bars engageable with a crank throw adjacent the crank pin.

7. A crank shaft rotating tool comprising a body, clamping means on the body adapted to be caused to clamp upon the crank pin of a crank shaft, crank throw engaging means on the body adapted to be caused to engage a throw of the crank shaft adjacent the crank pin, and means for applying a turning effort to the body in any of a plurality of positions with respect to the body.

DANIEL S. STOUFFER.