US1999202A - Haulage mechanism - Google Patents

Description

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- HAULAGE MEGHANI'SM Filed Dec. 50, 1932 W 5f r 6' @MM2 549 1,6 e

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Patented Apr. 30, 1935 HAULAGE MECHANISM Robert C. Osgood, Claremont, N. H., assigner to Sullivan Machinery Company, a corporation of Massachusetts Application December 30, 1932, Serial No. 649,589

V1I) Claims.,V (Cl. 5854-187) My invention relates to haulage mechanisms, and particularly to haulage mechanisms adapted to provide a plurality of speeds and having means for automatically eecting. a change yfrom one winding speed, to another.

' may' be desirable to allow the roof to come in,

and when this is to'be done a considerable saving can be effectedif the props can be saved, for these may be used over in other places. In removing the props they are pulled, andv because of the Yfact that they are under very heavy stress, due to the weight of the roof acting upon them, it takes a very considerable force to release them. It is necessary, particularly in some places where the roof is tender, to provide means for quickly withdrawing the prop from the position in which it hasstood in order that it may not be pinched by the descending roof and thereby lost. A pull of several thousand pounds is necessary when applied at one end of the prop to Ydislodge it, but a very much lowervpull is necessary to move it after it has been released, but the reduced pull must be at such a rate that the prop will be gotten away before the roof can falI upon it; To make sure of getting out the propit is highly desirable that there be provided automatic means for effecting the very rapid application of the quicker speed of withdrawal of the4 prop after it falls.

It is an object of the present invention to provide an improved haulage mechanism. It is another and more specic object of the invention to provide an improved haulage mechanism for use in pulling props.` It is a still further object of the invention to provide an improved haulage mechanism providing a plurality of haulage speeds with means for effecting an automatic change in speed upon a predeterminedv variation in load. It is a still further object of my inventionto provide an improved haulage mechanism havin-g a plurality of concurrently-energized drum-driving trains, and having incorporated therein means for rendering the one train or the other effective, dependent upon the resistance to drum rotation. Other objects and;V advantages of my invention will hereinafter more fully appear.

In the accompanying drawing, in which,` for purposes oi illustration, one illustrative embodiment of my invention is disclosed:

Fig. 1 is a plan view of ahoisting mechanism in which the illustrative embodiment of my inventionis incorporated;

Fig. 2 is a horizontal section through the mechanism of Fig. 1;

Fig. 3 is a plan view of the illustrative embodiment of my invention. in use inthe pulling of the DIOD;

Fig. 4 is a side elevation of an operation similar to that shown-in Fig. 3.

Referring to the drawing, it will be observed that uponA a suitable base or skid mounting I there are provided a pair oi upright bracket members 2 and 3) held by machine screws or the like, ll, to the skid member i; near one end of the skid member and beyond the bracket members 2 and 3', there is arranged a driving motor 5 having a controller, and if desired a reverse mechanism, all housed within a casing 6L Near the opposite end of the skid member and journaled in bearings within the. upstancli-ng bracket members 2, 3., is a shaft 9 which rotatably supports a winding drum l having-end flanges il, I2. The flange i-i has bolted or otherwise securely fastened to it, a. large spur gear I3; and the flange I2 has upon itan annular surface. I4 for frictional engagement with a friction clutch device which will shortly be described.

The motor 5 has a driving pinion l which meshes with and drives a large spur gear I 'i carried upon and keyed to a shaft I8, extending transversely of the skid I and journaled in bearings IS and 2B, respectively, mounted in the bracket or frame 2, 3;. vNear the bearing Z the shaft I 8l carries a pair of driving members, respectively a spur pinion 2l` and a chain driving sprocket 22. The spur pinionv 2i meshes with a spurl gear 23, which is keyed to a third transverse shaft 24 journaled in bearings 25 and 26 in the bracket members 2 and 3. The shaft 211 has slidably connected therewith, but held against rota- 40 tion with respect thereto, a bevel-toothed clutch member 2l pressed longitudinally of the shaft 24 by a spring 28. It will be understood that the clutch device 2l may be replaced by any other suitable apparatus for eiiecting a uni-directional driving connection between the shaftV 24 and a spur pinion 29 which is rotatably mounted by means of a sleeve 3.0 near that end of the shaft 2li which is journaled in the bearing 25. The pinion4 29 is formed u-pon the sleeve 3Bv which has 50 suitable bevel teeth il adapted to cooperate with the. bevel teeth 3.2 upon the clutch member 2i. Clutch member 2l may be held by any suitable means against rotation relative to the shaft 2i, and herein a sliding key connection 33 is shown, 55

for purposes of illustration. The spur pinion 2S meshes with and is adapted to drive the spur gear I3.

The chain sprocket 22 upon the shaft I8 is connected by a sprocket chain 35 with another, herein slightly larger, sprocket 3S, which is rotatably mounted upon the shaft 9 by means of a sleeve portion 31, which carries at its end near the flange I2 a flange portion 38 provided, if desired, with a frictional pad 3s or the like, for engagement with the surface I4 of the drum flange I2. The ange 38 is constantly pressed toward the flange I2 by a spring 40 which is arranged between the end of the sleeve 31 and a threaded member 4I adjustably screwed upon the shaft S, as at 42. Suitable casings 43 and 44 are provided for housing the gearing and chain drives.

The mode of operation of this apparatus will be readily understood and may be described in connection with the pulling of a prop. In Fig. 3 a prop P is shown connected by a rope 41 which extends around a suitably mounted guide sheave 48 to the drum I0 of the prop puller, which is arranged. in an entry 49 where it will not be injured byfalling of the roof upon the pulling of the prop P. By suitable manipulation of the controller, the motor 5 will be started; the pinion I3 will then drive the gear I1 and the shaft I8. Because a very heavy pull is necessary to release the prop, the sprocket 22 will rotate the sprocket 36 and with it the flange 38 and the friction member 39, but the power transmitted vwill be inadequate to cause rotation of the drum IB. However, the pinion 2I will be 'capable of rotating the gear 23 and thereby causing, through the clutch device 21, 3B, the pinion 29 to drive the gear I3 and thereby effect rotation of the drum IU. There is a very large reduction in the two spur gear reduction stages 2l, 23 and 29, I3; accordingly the prop will have its lower end released; and as soon as the prop is released there will be a great reduction in the amount of pull necessary to move it, a reduction which may be ten to one or more. Accordingly, the rotative force which the disc 38 and friction member 39 are adapted to transmit to the flange I2 will be sufficient to rotate the drum I0, and thereafter the driving train will change from the spur train 2i, 23, 29, I3 to the chain and sprocket and friction clutch drive 22, 35, 36, 38, 39, I2. Of course, during the rapid rotation of the drum I0 the pinion 29 will be rotated much more rapidly than the shaft 24, but the bevel teeth 3 I, 32 and the spring support of the clutch member 21 will permit overrunning and very little loss of power.

From the foregoing descriptionV it will be apparent that I have provided an improved haulage mechanism adapted to provide a very heavy starting pull and then automatically to shift to a very much faster, though lighter, moving pull. It will be noted that the parts are simple andrugged, and in all respects suitable for use in mines or the like, where the best of care to operative mechanism is difficult to furnish.

While I have in this application specifically described one form which my invention may assume in practice, itwill be understood that this form is shown for illustrative purposes only, and that the invention may be modified and embodied in various other formsV without departing from its spirit or the scope of the appended claims.

What I claim as new and desire to secure by Letters Patent is:

l. In a haulage mechanism, a Winding drum, a motor,a plurality of driving trains between said motor and drum, and means including clutches in said drive trains responsive to Variations in the winding effort to automatically render one of said trains ineffective and the other effective.

2. In a haulage mechanismna motor, a drum,

a train providing a large ratio of reduction, an-y other train providing a small ratio of reduction, said second mentioned train having a continuously loaded frictional driving connection with the drum, and means operative when said frictional driving connection is effective to permit overrun of the first mentioned drive train.

3. In a haulagemechanism, a motor, a drum, and a plurality of trains each having therein a spring loaded releasable drive connection structurally independent of the other and one yieldf able at a load sustainable by the other whereby one or the other is eifective depending on the resistance to drum rotation.

4. In a haulage mechanism, a motor a drum, and a plurality of sets of driving connections therefor each continuously tending to rotate said drum-so long as said motor rotates, one set of said drive connections including a transmission device of a type which permits slippage only in one direction and the other including a transmission device of a type which permits slippage in either direction upon overloading.

5. In a haulage mechanism, a motor, a drum, a plurality of 'sets of driving connections therefor each continuously tending to rotate said drum so long as said motor rotates, one of said connections permitting overrunning upon rotation of the drum at a higher speed in a Winding direction than Ythe speed transmissible by said connection, and the other of said connections including provision for permitting slippage on overloading.

Y6. In a haulage mechanism, a winding drum, a motor, a drive train between said motor and said drum including a constantly spring-loaded clutch permitting slippage between its parts in either direction of relative rotation upon the existence of predetermined forces tending to eifect such relative rotation, and a second drive train between said motor and said drum including a. constantly spring-loaded clutch permitting 'overrunning.

1. In a haulage mechanism, a winding drum, a motor, a fast speed drive train for said drum driven by said motor and including a constantly loaded friction clutch coaxial with said drum, and a slow speed drive train for said drum driven Vby said motor and including a constantly loaded overrunning clutch whose parts rotate on an axis parallel to a line parallel to the axis of the drum.

8. In a haulage mechanism, a winding drum, a motor, a fast speed drive train for said drum driven by said motor and including a constantly loaded friction clutch coaxial with said drum, and a slow speed drive train for said drum driven by said motor and including means for imparting a positive drive to said drum at a slower angular speed than that of thedriving element of said friction clutch.

9. In a haulage mechanism, a winding drum, a motor, a fast speed drive train for said drum driven by said motor and including a constantly loaded friction clutch coaxial with said drum at Aone end of the latter, and a slow speed drive train for said drum driven by said motor and arranged to impart a. positive rotation to the opposite end of said drum.

10. In a haulage mechanism, a Winding drum, a motor, a plurality of driving trains between said motor and drum each for driving the latter in the same direction and respectively transmitting rotative forces to the opposite ends of said drum, and means for automatically rendering one of said drives ineffective and the other eective.

ROBERT C. OSGOOD.

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