US1023245A - End-play device. - Google Patents

Description

O. A. FISCHER. mm PLAY DEVICE.

APPLICATION FILED 001214, 1911.

1 023 245 Patented Apr. 16, 1912.

WITNESSES? q WVEN Q mrrvma N E;Y..

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UNITED. STATES, PATENT OFFICE.

CHARLES A. FISCHER, OF CHICAGO, ILLINOIS, ASSIGNPR TO ALLIS-CHALMERfi COM- PANY, OF MILWAUKEE, WISCONSIN, A. CORPORATION ()1? NEW JERSEY.

ENID PLAY DEVICE.

Specification of Letters Patent.

I Patented Apr. 16, 1912.

Application filed October 14, 1911, Serial No. 654,719.

To all whom it may concern.

Be it known that I, CHARLES A. FISCHER, a citizen oi the United States, residing at Chicago, in the count of Cook and State of Illinois, have invented a certain new and Useful Improvement in End-Play Devices, of which the following is a specification.

This invention relates to improvements in the construction. of end-play devices for im parting end motion to rotating shafts, and is particularly applicable to the shafts or crushing rolls, dynamos or like apparatus.

The object of the invention is to provide a meansfor imparting end play or motion to a rotating shaft, which is simple in eonstrucv tion and efficient in operation. a

In the use of end play devices on the shafts of crushing rolls, it is not desirable to have the relative reciprocation between the rolls occur at frequent intervals, the desired rate of relative reciprocation being approximately once in twenty minutes for ordinary classes of work.

With this requirement as a basis, it is the object of the present invention to provide an end play device or means for shifting the shaft, which will give a very slow lateral reciprocation to a rotating shaft.

A clear conception of an embodiment of the invention can be had by referring to the drawing accompanying and forming part of this specification, in which like reference characters designate the same or similar parts in the various views.

Figure l is a central vertical section through an end play device showing eaiue applied to a fragment of the frame. Fig. :2 a transverse vertical section through an end play device, inclosiug casing thereof being partly broken away. Fi is an enlarged side view, partly in section, oi partof the mechanism forming the means for imparting reciprocating motion to a shaft.

The shaft 1, which may be that oi? either a dynamo, crushing roll, or other similar machine, supported in hearings formed in the frame 2, a fragment of which is shown. The gear 4 fastened or secured directly to the shaft 1 and meshes with a gear 16 which is rotatahly mounted on the overlmngiug end of a stationary countcrsha'l't projecting outwardly from the frame member 3. A. second counlersha'll, which carries the l6, l9. fixed to it at either oii its ends, is adapted For rotation witnin the frame memos. a.

Ihe gearflS at one end of the second counter shaft meshes with the gear 16, While the gear 19 at the opposite end of the second countershaft meshes with a gear 15 which 15 free to rotate upon a stationary countershaftprojecting outwardly from the frame 3. The sleeve 20 surrounds the end of the shaft 1 and is prevented from displacement longitudinally of the sleeve axis by means of outwardly projecting thrust collars 8 formed hitegral with and projecting outwardly from the sleeve 90. The thrust collars 8 ooact in corresponding circular grooves formed in the frame member 3 and cap 7. The gear which is secured to the sleeve 20, meshes with the gear 1.5 which gear is adapted to rotate on the stationary countershaft which projects from the frame The frame 3 is stationarily supported by means of standarus 17 which project away from the frame 2. The casing 6, which is. formed of sheet metal, is also supported by the standards I? and iucloscs'the mechanism carried by the end of the shaft 1. I i

It should he noted that the construction of the various gears should he such that the gear l: contains a greater number of teeth than the gear 5. The gear 16 should contain less teeth than the gear 15, while the gear 18 also should contain less teeth. than the gear 19., the pitch of all those gears, however. being: the same. It should also be noted that the gear l6 of somewhat pgroa Width than the Sears 4, 1th. 'lhe relative numhcr of teeth of the various gears is, however, dependent" upon the relative motion desired between the shaft and frame and will vurv For different this s of apparatus.

lhe shaft l has a circuhir groove or rej'ioriuod therein some dista .short of its end, thus providing an eula ed portion ll which projects outwardly in the form of circular flange. A two-piece disk 1.0 pro jects inwardly into the groove or recess tornuwl in the shait l and is secured to the sleeve 20. One of the surfaces of the disk l0 is foru'ied perpendicular to the axis of the sleeve and shaft 1 and is adapted to coact against an end surface of the shaft 1. The opposite surface oil the disk 10 is formed at an angle to the axis of the shaft and sleeve and approaches the enlarged portion ll at one side thereof, see Fig. 3., he dish in which incloses the outer sleeve 20, also has an angular lace formed on its side ada "surfaces formed on the disks 10, 12.

cent the end of the shaft 1, this angular surface being parallel to the angular surface of the disk 10.

Cylindrical blocks or members 13 are 5 formed with stub ends which coact in a hole formed through/the flange portion 11. The outer extremities of the members 13 are provided with semispherical recesses in which the buttons or hemispheresl lcoact, see Fig.

The outer plane surfaces of the l1emispheres 14 coact with the parallel inclined The longitudinal distances between corresponding points on the plane surfaces of the hemi- 5 spheres 14 are approximately equal to the During the operation of the device the main shaft 1 is rotated by any suitable means not shown. The rotation of the shaft 1 is transmitted through the gear to the gear 16, from the gear 16 through the gear 8 and co'untershaft to the gear 19. from which the motion is further trans mitted through the gear to the sleeve through the gear 5. The proportioning of the number of teeth of the various gears is such that there will be a slight difference in the relative numbers of revolutions made by the shaft 1 and sleeve 20, and a slight relative angular advancement between the parts for one revolution. This proportioning of the number of teeth in the gears for crushing rolls might, for example, be such that during twenty-one hundred revolutions of the sleeve 20, the shaft would make two thousand and ninety nine revolutions or vice versa. As the shaft 1 and sleeve 20 shift angularly relative to each other, it will be noted that the hemispheres 14c and blocks 13 which are carried by the shaft 1 will change their relative positions along. the

angular surfaces formed on the disks 10,

12 of the sleeve 20. This changing of the relative position of the hemispheres 14: causes the shaft 1 to move longitudinally within the sleeve 20 and relative to the frame 2-. In the position shown see Fig. 1, the shaft 1 is to the extreme left position of its travel. As the hemispheres 14: ap; preach the upper portions of the angular surfaces in the position of the elements as shown in Fig. 1, the shaft 1 approaches a po sition to the extreme right within the sleeve 20. During the angular shifting of the shaft 1 within the sleeve 20, the member 13 adjacent the disk 10 rolls upon the portion of the shaft 1 having smallest diameter and also upon the adjacent cylindrical surface formed on the interior of the sleeve 20. The member 13 adjacent the disk 12 rolls upon the cylindrical surface formed on the interior of the sleeve 20. Since the hemispheres 1 1- which connect the members 13 with the parallel angular surfaces, have spherical. bearings, they can adjust themselves to any angular position which they may be called upon to take due to the angular advance of either of the members.

It will be noted that by proper proportioning of the driving gears between the shaft 1 and sleeve 20, the rate of reciprocation of the shaft 1 within the sleeve 20 can be varied to any desired degree. Since the sleeve 20 is locked against longitudinal movement. by the thrust collars 8 co-acting within the member 3, the motion of the shaft 1 must be relative to the frame 2, thus giving the members carried by the shafta reciprocating motion in addition to the ro tary motion thereof.

It should be understood that it is not desired to be limited to the exact details of construction shown and described, for obvious modifications will occur to a person skilled in the art.

It is claimed and desired to secure by Letters Patent,

1. In an end play device, a rotary shaft,

a sleeve adjacent said shaft, means for rotating said sleeve at a different speed from that of said shaft, means for preventing axial displacement of said sleeve, and means between said shaft and said sleeve and no acting with said mean for rotating said sleeve to move said s aft longitudinally relative to said.sleeve.

2. In an end play device, a rotary shaft, a sleeve around said' shaft, means for rotating said sleeve with said shaft and at a diti'ercntfispeed, means for preventing axial displacement of said sleeve. and means be tween. said shaft and said sleeve and coacting with said means for rotating said sleeve to reciprocate said shaft within said, sleeve.

3. In an end play device, a rotary'shaft member, a sleeve member around said. shaft member, one of said members having a cam surface formed thereon, means for rotating said members at different relative speeds, means for preventing axial displacement of one of said members, and means between.

said members and coacting with said cam surface and with said. means for rotating said members to reciprocate one of the mcmhers relativeto the other.

t. In an end play device, a rotary shaft member, an abutment member adjacent said. shaft member, one of said members having a plane surface inclined relative to the axis of said shaft member and located opposite an end surface of the other of said members, means for rotating said members at different relative speeds, means for prev'enting'axial displacementof one of said members, means between said Opposed surfaces fors'pacing said members, said spacing means including a spherical segment the plane surface of said spherical segment being slidable on said inclined-surface, and means for axially moving one of said members so as to cause said spacing means to maintain contact with said opposed surfaces.

5. In an end play device, a rotary shaft member, anabutmentmember adjacent said shaft member, one of said members having a plane surface inclined relative to the axis of said shaft member and located opposite an end surface of the other of said members, means for rotating said members at different relative speeds, means for preventing axial displacement of one of said members, means for spacing said members, said spacing means comprising a spherical segment, the plane surface of said segment being slidable on said inclined surface, a member rotatable on an axis eccentric to said shaft axis and recessed for coaction with the spherical surface of said segment, and means for axially moving one of said first members so as 1 to cause said spacing means to maintain contact with said opposed surfaces.

In testimony whereof, the signature of the inventor is afiixed hereto in the presence of two Witnesses.

CHAS. A. FISCHER.

Witnesses:

THOMAS A, DALEY,

J. M. GERAGHTY.

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