US1316936A - blackmarr - Google Patents

Description

F. S. BLACKMARB.

` DIFFERENTIALLY GEARED DRUM. APPLICATION FILED MMI. a. I9I7.

1,3 1 6,936. Patented Sept. 23, 1919.

F. S. BLACKMARR.

DIFFERENTIALLY GEARED DRUM.

Arme/mon man MAR. a. 1911.

, 1,316,936'. Pm'nasept. 23, 1919.

2 SHEETS-SHEET 2- UNTTE sTATEs PATENT oEEroE.

FREDERICK S. BLACKMARR, OF BAYEIELD, WISCONSIN, ASSIGNOR T0 BLACKMAIRR MACHINE COMPANY, 0F IBAYFIELD, WISCONSIN, A CORPORATION' OF WISCONSIN.

DIFFERENTIALLY-GEARED DRUM.

Specification of Letters Patent. Patented Sept. 23, 1919.

Application led March 8, 1917. Serial No. 153,396.

To all 'whom t may concern:

Be it known that I, FREDERICK S. BLAoK- MARR, a citizen of the United States, and resident of Bayfield, in the county of Bayfield and State of Wisconsin, have invented certain Improvements in Differentially- Geared Drums, of which the following is a specification. l

This invention relates to improvements in drums designed for hoisting, pulling or moving heavy loads.

The objects I have in View are to provide a drum that is simple in construction; that is so geared as to multiply many times the power applied; that is automatically locked when the shaft passing through "ft is stationary; and in which the gearing can be quickly and easily disconnected, leaving the drum to turn freely in either` direction.

The invention consists generally in the constructions and combinations hereinafter described and particularly pointed out inthe claims.

In the accompanying drawings formlng part of this specification,

Figure 1 is a longitudinal, vertical section of a drum embodying my invention, a suitable engine or motor being shown coupled to the drum shaft, and the gearing being shown in position for rotating the drum.

Fig. 2 is a similar view, the engine or motor being omitted and the gearing being unshipped or disconnected so as to permit the drum to turn freely in either direction.

Fig. 3 is a Vertical section on line 3-3 o Fig. l.

Fig. 4 is a similar section on line 4 4 of Fig. 1,

Fig. 5 is a side elevation, and

Fig. 6 an end elevation of the sleeve that connects the drum and the gear.

The drum frame or casing may be of any suitable construction. As here shown the barrel 2 of the' drum is provided at itsends with ring gudgeons 3 and 4 that are mounted to revolve in bearings in the circular plates 5 that are secured to the upright substantially circular or ring frames 6 and 7 having suitable feet or bases 8. The frames 6 and 7 are connected at the bottom by the flanged plate 9, at the top by the flanged plate 10, and at the sides,-front and bach-by flanged bars 11. An internal ring gear 12 is secured to the front of the frame 7. Outside of the ring gear I arrange a spider 13 that is provided at its center with a bearing 14: for the shaft l5. The other end of the shaft is mounted in a bearing block 16 carried by and secured to the frame 6. The shaft. 15 is provided near one end with an eccentric 17. A gear 18, having a hub 19 provided at one end with an annular groove 20 and at the other end with a square or rectangular recess 2l, is mounted on the eccentric portion 17 of the shaft 15. 'The gear 18 is of slightly less diameter than the ring gear 12, this difference in diameter being equal to the throw of the eccentric 17, or the difference between the diameter of the eccentric 17 and the diameter of the shaft 15. The gear 18 has also a few less teeth than the ring gear 12. As here shown the gear 18 has sixty-seven teeth, and the ring gear 12 has seventy teeth.

A lever 22 is pivoted on the spider 13 and is provided with a fork 23 that engages the groove 20 in the hub 19 of the gear 18. By this lever the gear 18 may be moved into and out of engagement with the ring gear 12.

The barrel of the drum has a comparatively large opening extending through it and this opening in the rear portion of the barrel is of polygonal (preferably rectangular) form in cross section. A sleeve 24 having the opening through it slightly flaring at'its forward end, is arranged within the opening in the drum. The sleeve is polygonal (preferably rectangular) in cross section at or near each end, the polygonal portion 25 at the rear end of the sleeve being placed at an angle to the polygonal portion 26 at the front end (see Fig. 6).

The polygonal portion25 of the sleeve is placed within the polygonal portion' of the opening in the barrel of the drum and the polygonal portion 26 is placed within the socket or recess 21 in the gear 18 and it is held therein as the gear is moved longitudinally on the shaft 15 to bring it out of mesh with the ring gear 12, by a plate 27 secured to the hub of the gear and projecting `over the edge of the recess. The sleeve moves longitudinally on the shaft with the gear 18 but does not at any time have its rectangular portion drawn outl of engagement' with the rectangular portion of the opening in the drum. This connection forms a universal joint betweenv the gear 18 and the barrel ofthe drum.

I prefer to drive the mechaI-iismA from a suitable motor or engine coupled directlyto the shaft 15. Ihave here shown an engine 28 having its shaft 29 in line with the shaft 15, and the two shaft-s provided with clutch members 30 and 31, and one of said members provided with an operating lever 32;

As I frequently use this drumY in pulling up stumps or rocks, I have shown the drum Vand engine mounted uponv suitable timbers will, therefore, take twenty-three and-onethirdV revolutions of the shaft 15 to produce one revolution of the gear 18 and one revolution of the drum. The power applied to the shaft 1 5"will be multiplied on the drum twenty-three and'V one-third times less the loss from friction. The drum will, therefore, be rotated at only about one twentythird of the speed of the motor. This will. give the' drum' a slow speed with great power.

In pulling stumps the base of the machine will be suitably anchored and a cable extending from the drum will be attached to the stump. In an application of even date herewith entitled Stump puller and sta-cheri I have' illustrated' the arrangement' of this -drum in ja stump'-pulling machine.

will be noted that the drum can only turn as the shaft 15 is rotated. Whenever the shaft 15 is stationary the 'drum is locked against movement in veither direction. The

"gear 18 can be moved quickly into or out of engagement with thering gear12, and when -thes'e parts are'out of engagement the drum will turn freely in either direction'. n

I do not limit myself to thedetail's of construction herein sh'own and described, as

the same may be varied in many "particulars l -without d'epa-r-ting'from my invention.

f I claim as my invention: i v 1.' The combination, with a rotatable drum "and a frame in which itis mounted, of a stationary ring gear-coaxial with said drum, fa rotatabl'ezshaft concentric with said: drum randprovi'ded" with an 4eccentric in the plane of said ring gear, a gear mounted upon the eccentric portion of said shaft for longitudinal movement thereon and meshing with said ring gear, said gear being of less diameter and having fewer teeth than the Vring gear, andV means connecting said gear and saidv drum for simultaneous rotation, Asaid means including a member loosely encircling said shaft and slidable thereon with said gear.

2. The combination, with a rotatable drum and a frame 1n which it 1s mounted, of a .stationary ring gear coaxial with said drum, a

rotatable shaft concentric with said drum and provided with an eccentric inthe plane of said ring gear and projecting forward therefrom, a gear slidably'mounte'd upon the eccentric portion of said shaft, means for bringing said gear into or Vout-of mesh with said ring gear, said gear 'beingofless diameter andl having fewer teeth than the ring gear, and means connecting said gear and said drum for .simultaneous rotation, said means comprising a member loosely encircling said shaft and having its ends engaging sockets arranged in eccentric relation in saidoear and drum. f

3. p he combination, with a rotatable drum and aframev in which it is mounted,` of a f stationary ring gear coaxial with said drum, a shaft-passing through the axis of :said 'drum and provided with an eccentricinl the plane of said ring gear, a gear mounted to slide upon the eccentric portion of said shaft andV meshing with said' ring gear, said gear being of less diameter and having fewer teeth than the ring gear, and a sleeve Vsurrounding said shaft andhaving one end connected with said gear for movement there with and the opposite end connected with said drum, whereby said gearv and said drum are caused to rotate together. f

4. The combination,` with a rotatable drum and a frame in which it is mounted, of a y stationary ring gear coaxial with said drum,

a shaft having its axis concentric with-said drum, bearings in which said shaft is rotatably mounted, said shaft being provided with an yeccentric in theV plane of said ring gear, a gear mounted upon the eccentric portion of said shaft and meshing ywith said ring gear, said gear being of less diameter and having fewer teeth than the ring gear, and a sleeve having its ends connected-respectively to said drum and said ear, the

end of said sleeve that is connecte Ito said *gear moving eccentrically .with the gear.

5. The combination, with a rotatable drum and a frame in which it is mounted, of a .stationary ring gear coaxial with said drum,

a shaft passing through the axis of said drum and provided with an eccentric in the plane ofs'aidring gear, a gear mounted upon the eccentric portion of said shaft and meshving with said ring gear, said gear being of less diameter and having fewer teeth than the rin gear, and a sleeve loosel surrounding sai shaft and provided lwit polygonal ends, one of which is arranged in a polygonal opening in the drum and the other in a polygonal opening in the gear.

6. The combination, with a rotatable drum and a frame in which it is mounted, of a stationary ring gear coaxial with said drum, a shaft passin through the axis of said drum and provided with an eccentric in the plane of said ring gear and projecting forward therefrom, a gear slidably mounted upon the eccentric portion of said shaft, means for bringing said shaft into and out of mesh with said ring gear, said gear being of less diameter and having fewer teeth than the ring gear, a sleeve surrounding said shaft and provided with poly onal ends one of which is arranged in a po ygonal opening in the drum and the other in a polygonal opening in the gear, and means causing said sleeve to move longitudinally with said gear as it is shifted into or out of mesh with said ring gear without being disconnected from said drum.

7. The combination, with a rotatable drum and a frame on which it is mounted, of a stationary ring gear coaxial with said drum, a shaft having bearings, and its axis concentric with said drum, said shaft having an eccentric thereon, a gear mounted on the eccentric portion of said shaft for movement into engagement or out of engagement with the teeth of said gear ring, and having fewer teeth than said ring, and a driving connection between said gear and drum, and mounted to be made operative when said gear is engaged with said ring, or inoperative when said gear is disengaged from said ring.

In witness whereof I have hereunto set my hand this 5th day of December, 1914.

FREDERICK S. BLACKMARR.

Copies of this patent may be obtained for ve cents each, by addressing the Commissioner of Patents, Washington, D. C.

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