US1348023A - Locking device for eccentric bushings - Google Patents

Description

F. J. McAVOY.

LOCKING DEVICE FOR ECCENTRIC BUSHINGS.

APPLICATION FILED JAN. 17, 1920- 3 I 24 I 1 l M WITNESSES Patented July 27, 1920.

IN VE/V TOR A TTOR/VEVS UNITED STATES FRANCIS JOSEPH MoAVOY, 0F NEWARK, NEW JERSEY.

LOCKING DEVICE FOR ECOENTBIC BUSHINGS.

Specification of Letters Iatent. Patented 7 July 27,1920.

Application filed January 17, 19 20. Serial No. 352,096 r To all whom it may concern.

Be it known that I, F RANCIS JOSEPH M0- Avov, a citizen of the United States, and a resident of Newark, in the county of Essex and State of New Jersey, have invented a new and Improved Locking Device for Eccentric Bushings, of which the following is a full, clear, and enact description.

The invention in its general aspect relates to internal combustion engines, such as are used in automobiles and other vehicles, and in its particular application the invention relates to locking devices for eccentric bushings such as shown and described in (cheapplication for Letters Patent of the United States, No. 327,382, filed by me on September :30, 1919.

The object of the present invention is to provide a new and improved locking device for eccentric bushings arranged for convenient attachment to the engine or motor to lock the eccentric bushing in place and to allow of using the device as a spanner wrench for turning the eccentric bushing after the same has been unlocked.

Another object is to insure accurate fitting of the locking device on the timing gear case of the motor.

Vith these and other objects in view, the invention consists of certain novel features of construction as hereinafter shown and described and then specifically pointed out in the claims.

A practical embodiment of the invention is represented in the accompanying drawings forming a part of this specification, in which similar characters of reference indicate corresponding parts in all the views.

Figure 1 is a sectional side elevation of the improved locking device as applied, the section being on the line 11 of Fig, 2;

Fig. 2 is a cross section of the same on the line 22 of Fig. 1;

Fig. 3 is a face View of the bracket; and

Fig. 4 is an edge View of the same.

In internal combustion engines as now generally constructed it is occasionally necessary to tighten the sprocket chain driven from the motor shaft and driving the generator shaft, the motor cam shaft and the ig nition timer shaft. The sprocket wheel con nected with the generator shaft is journaled on an eccentric bushing and when it becomes necessary to tighten the sprocket chain then the bushing is unfastened and turned to correspondingly shift the sprocket wheel with a view to tighten the sprocket chain. The

means heretofore employed for fastening the bushing in place made. it necessary to disassemble a number of adjacent parts of the motor in order to allow turning of the bushing and tightening of the sprocket chain. In practice, this operation usually consumed several hours. With my improvement presently described in detail the adjustment can be made in about ten minutes as this disassembling of the parts of the motor is not necessary.

The bushing 10 is mounted to turn in a bearing 11 forming part of the motor frame 12, and the bushing is. provided at its outer end with an eccentric 13 on which is mounted to turn the motor generator sprocket Wheel 14 connected by a sprocket chain, indicated in broken lines, with sprocket wheels on the motor cam shaft which actuates the Valves and drives the ignition timer shaft. The motor generator sprocket wheel 14 is further provided ,with a coupling member 15 slidingly connected with a coupling member 16 secured on the shaft 17 of the motor generator 18 to actuate the latter. 7

The bushing 10 is provided with a flange 20 fitting against the inner face of the bearing 11 and spaced a short distance from the motor generator 18, as plainly shown in Fig. 1. The face of the flange 20 is provided with spaced recesses 22 arranged in a circle concentric with the peripheral face of the flange" 20 and two oppositely disposed recesses 22 are engaged by lugs or pins 23 formed on one face of a bracket 24 removably attached to the motor frame 12. For this purpose use is made of a stud bolt 30 having threadedends 31 and 32 and a collar 33 between the threaded ends. The threaded end 31 screws in the frame 12 and its outer end is engaged by a lock nut 34 securely to lock the stud bolt 30 in position on the frame 12.. The collar 33 abuts against the inner face of the frame 12 and on 'the threadedend 32 screws a nut 35 which extends through an opening 36 formed in the bracket 24. The nut 35 is provided with a polygonal head 37 which abuts against the face of the bracket 24, as

plainly shown in Fig. 1. The upper end of the bracket 24 is provided with a flange 40 slightly rounded off in a transverse direction and adapted to rest on the inner face of the frame 12. The lower end of the bracket 24 is in the form of a fork having two fork members 41 and 42 carrying the pins 23 previously mentioned, and on the said fork members 41 and 42 are formed two lugs 43 and 44 adapted to rest against the face of theflange 20. By reference toFigs. 1

and 4 it will be noticed that the lugs '43, 44-

are less in height than the pins 23 to allow the latter to enter the corresponding recesses 22 at the time the lugs 43 and 44 are seated on the face of the flange 20. It will also be noticed that by the use of the flange 40 and the lugs 43, 44, a three-point contact is provided for the bracket 24 to hold the latter securely in position on screwing up the clamping nut 35 on the stud bolt 30. By rounding off the flange 40 a point of contact is provided between the flange and the frame 12 to insure proper contact of the flange 40 on the frame 12 and the lugs 43, 44 on the face of the flange 20. The bracket 24 is preferably reinforced by integralribs 48 located on opposite sides of the opening 36.

. When the bracket 24 is in position as shown in Figs. 1 and 2 then the pins 23 engage sundry of the recesses 22 and consequently the bushing 10 is locked againstturning in its bearing 11. IVhen it is desired to turn the bushing 10 in the bearing 11 for tightening the sprocket chain passing over the sprocket wheel 14 then it is only necessary for the operator to unscrew the nut from the stud bolt 30 to unfasten the bracket 24, which can now be used as a spanner wrench for turning the bushing 10 face of the flange 20.

It is understood that very little room is had between the flange 20 of the bushing 10 and the motor generator 18, but as the bracket 24 takes up very little room it can be readily put in place for locking the bush ing against turning or for turning the bushing to adjust the eccentric 13 for tightening the sprocket chain, as above explained.

From the foregoing it will be seen that by the arrangement described the operator.

the sprocket, chain without disturbing the position of any one of the parts of themotor.

Having thus described my invention, I claim as new and desire to secure by Letters Patent 1. In an internal combustion motor, an eccentric bushing provided with spaced recesses arranged in a circle concentric to the peripheral face of the bushing, a bracket provided with pins adapted to engage sundry of the said recesses, and fastening means detachably fastening the bracket to a fixed part of the motor, the said bracket when fastened in place bythe said fastening means holding the bushing against turning, and the said bracket when unfastened by the said fastening means serving as a spanner wrench to turn the bushing.

2. In an internal combustion motor, an cecentric bushing provided with spaced recesses arranged in a circle concentric to the peripheral face of the bushing, a bracket provided with pins adapted to engage sundry of the said recesses, the said bracket having an opening therethrough, a stud bolt attached to a'fixed part of the motor, and a clamping nut screwing on the said stud bolt, the said clamping, nut extending through the said bracket opening and the said nut having a head abutting against the face of the bracket to clamp the latter in place on the said fixed part of the motor.

3. In an internal combustion motor, an eccentric bushing provided with spaced recesses arranged in a circle concentric to the peripheral face of the bushing, a bracket provided with pins adapted to engage sundry of the said recesses, the said bracket having at one end a fork on which the pins are located, the said bracket having an open: ing intermediate the fork and the other end,

the latter having a rounded off flange adapted to rest on a fixed part of the motor, and the members of the fork having lugs adapted to rest on the face of the bushing, a stud bolt held on the saidfiXed motor part, and a nut extending through the said bracket opening and screwing on the said stud bolt, the said nut having a head engaging the face of the bracket. v

FRANCIS JOSEPH MoAVOY.

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