US2165895A - Hoisting mechanism - Google Patents

Description

July 1l, 1939. J. F. JoY

HOISTING MECHANISM- original Filed July 1, 1935 4 Sheets-Sheet 1 IN V EN TOR. (Je/Uffy. A...) 10mn" A TTORNEY.

July ll, 1939. J, JOY 2,165,895

- HOISTING MEcHANIsM Original Filed July 1, 1935 4 Sheets-Sheet 2 INVENTOR.

JSQ/QZ''Jy BY Ml',

ATTORNEY.

July- 11, 1939. J. F. .JOYA 2,165,895 L HoIsTING MEcHANisM Original Filed July 1,'1935 21 Sheets-Sheet 3 INVENTOR.

ATTORNEY.

-July 11, 193.9. J. F. JOY

5 I HOISTING MECHANISM Original Filed July l, 1935 4 Sheets-Sheet 4 NNN . @SMN INVENTOR.

BY Aw: d' mm.

ATTORNEY.

Patented July 1l, I1939v 2,165,895 nois'rmG MECHANISM Joseph F. Joy, Claremont, N. n., minor to sullivan Machinery Company, a corporation of hnsetts Original application July l, 1935, ySerial No. 29,308. Divided and this application March 19,

1.936, Serial-No.' 69,696 v -s claims. (ci. 25a-16s) v generally comprising a self-propelledbase l hav'- This invention relates to hoisting mechanisms. and more particularly to`improvements in hoisting mechanisms of the portable tractor mounted type.

An object of this invention is to provide an improved portable hoisting mechanism. A n. other object is to provide a'n improved portable hoisting mechanism of the self-propelled type whereby the hoist may be maneuvered with facility into different operating positions and. may be readily transported by its own self-propelling mechanisml from one working place to another. A further object is to provide an improved hoisting mechanismY having a novel arrangement 'of the hoisting drums and improved driving and controlling means for the drums; A still further object is to provide an improved hoisting mechanism of the tractor tread supported and propelled type. These and other objects and advantages of the invention will, however, hereinafter more fully appear.

This application is a division of my copending application Ser. No. 29,308, iiled July 1, 1935, `and patented April 12, 1938, No. 2,113,760.

In the accompanying drawings there is'shown for purposes o1' illustration one form which the invention may assume in practice.

In these drawings:

Fig. 1 is a' plan view of the illustrative form of the improved 'self-'propelled hoisting mechanism.

Fig. 2 is a side elevationalv view of the hoisting mechanism shown in Fig. 1, with a portion of the casing broken away to illustrate details of the interior construction.

Fig. 3 is an enlarged view in longitudinal section taken substantially on line 3 3 of Fig. 1.

` Fig. 4 is a cross sectional view taken substantially on line l-l'of Fig. 3.

Fig. 5 is a horizontal sectional view taken substantially on line 5-5 of Fig. 3.

Fig. 6 is an enlarged vertical sectional view illustrating the drum clutch control mechanism shown in Fig. 3, the view taken substantially on line 6 6 0f Fig. 5.

Fig. 7 is a horizontal sectional view takensubstantially on linel--l of Fig. 3.

Fig. 8 is a diagrammatic view showing the improved hydraulic iluid system and the associated control means.

.guided endless track-laying chains Il.

ing mounted thereon hoisting drum means generallydesignated l. The base l comprises a body 5 mounted on and supported by endless track-laying treads 6, 5 arranged at' opposite sides of the body. 'I'he tractor treads'comprlse tread frames 'l rigidly secured `to the sides of the body 5 and embodying upper and lowerguide members I and A9 having guideways in which are 'I'hese track-laying chains are herein `oi the block type carrying cleat-like plates engageable with the mine iioor for propelling the hoist. The forward portions of these endless tractor chains are guided by guide sprockets Il journaled on adjustable bearing blocks I2 mounted in longitudinal guideways I3 formed on the tread side frames 1, and these bearing blocks are adjustable longitudinally within their guideways by means of adjusting screws I 4. By adjusting the screws It the bearing blocks I2 may be slid in their'guideways to move the guide sprockets II longitudinally with respect to the tread frames 1, thereby to take up a'ny undue slack in the chains. The rearward portions of the tread chains engage drive sprockets I5, I5 having their hubs keyed to the projecting ends of alined rear axles Ii and I'I journaled in bearings I8 supported by bearing supports i9 attached to a diilerential housing 29 secured to the hoist body 5. Arranged within this differential housing is a differential 2i of a standard automotive design including a rotatable support 22 carrying bevel planet gears 2l meshing with coaxial bevel gears 2l and 25 fixed to the alined axles I5 and I'l, respectively, and the support 22 is driven by a worm wheel 2l fixed thereto andmeshing with the teeth of a drive worm 21. As shown in Fig. 3, the drive worm 21 is lixed to a longitudinal shaft 28 journaled within bearings 29 supported within the dili'erential housing 2l. Arranged centrally within the hoist body 5 is a motor 2l, herein preferably of the reversible electric typ. having its powershaft 3| horizontally disposed and extending longitudinally of the hoist body. Connected to the rear end of the motor power shaft by a coupling 32 of a conventional design'is a planetary, slip controlled change speed mechanism generally designated Il, likewise of a standard automotive design, and embodying irictionally controlled planet gears for effecting drive of a shaft 34 at high, low and medium speeds, under frictional control at each speed, and also reverse irictionally controlled drive of the shaft Il. As this planetary transmission mechanism is of a lever type operating mechanism 43 controlled by a/hand lever 44. From the foregoing it will be evident that the track-laying treads may be driven by the motor 3l under frictional control at three forward speeds and in reverse by the planetary transmission'mechanism 33, clutch 35,

shaft 35, spur gearing 31, 35, worm gearing 21,

25, diiferential gears 23, 24, 25 and the alined axles I and I1 driving thesprockets- I5, I5. By regulating the brake bands 4I and 42 the drive of the track-laying treads may be controlled to effect speeding up of the drive of one tread and `slowing down of the other, thereby to v enable steering of the hoist as it is propelled yover the mine door in a well known manner. It `wi1l 4thus be seen that the hoist is self-propelled and maybe moved and guided by the track-laying :treads during propulsion thereof over the mine iloor. f

`The hoisting means generally designated 4 embodies a pair of relatively rotatable hoisting or haulage drums 45 and 49 arranged in superimposed coaxial relation on the upper portion of thehoist body, and wound on these drums are portions -5II and 5I of an endless drag line or haulage cable or rope, as shown in Fig. 2. These drums arejournaled for rotation about a vertical axis on bearings supported by a centrally located tubular shaft 52 in turn journaled in bearings supported within a front gear housing 53 attached to the front end of the hoist body 5. Disc ' clutches 54, 55 are provided for connecting the drums 45 and 49 to the tubular shaft 52.

KKeyed to the forward end of the motor power shaft 3I is a spurl pinion 55 meshing, as shown most clearly in Fig; 5, witha spur gear 51 keyed to a longitudinal shaft 55 suitably journaled in the gearing housing 53. Fixed to this shaft is a worm 55 meshing with a horizontal worm wheel 55 arranged within the gearing housing and xed to the lower end of the vertical shaft 52 (see also Fig. 6).

The operating means for the disc clutches 54 and 55 comprises, as shown most clearly in Fig. 6, a servo-motor having a hydraulic cylinder II arranged coaxially with and projecting within the tubular shaft 52 (see also Fig. 3). This cylinder contains a vertically reciprocable piston 52 having ilxed thereto a tubular rod 53 projectingupwardly throughthe packed upper head 54 of the cylinder and threadedly secured at its upper end within a block 55 above the upper hoisting drum. Also xed within the piston 52 and extending coaxially through the tubular rod 53 is a tubular rod 55 having its upper end threadedly flxed within an upper block 51. The block 51 has a depending cylindrical projection 55 which fits tightly in a bore formed in the lower block 55, thereby to provide an upper closure for a chamber 59 in the lower block. l'brmed in the upper block is a chamber 15 with which the inner tubular rod 53 communicates. Hydraulic pressure is adapted to be supplied to the chambers 5l and 10 in the blocks in a manner to be later described. ' I'he clutches 54, 55 are provided with a clutch applying plate 1I having engaging its opposite surfaces ball thrust bearings 12, 13,l and surrounding the tubular rod 53 is a tubular sleevev14, while engaging the lower thrust bearing 13 and fixed to the tubuthe inner tubular rod 66 and through an axial opening 19 in the piston to thel lower end of the hydraulic cylinder, the piston 62 is moved upwardly to shift the clutch applying plate 1I in a direction to apply the upper clutch 54 to connect the, upper drum 48 to the drive shafty 52. When hydraulic pressure is supplied from the chamber 59 through the tubular rod 5,3 and openings 90 in the lower end of the rod to the upper end of the hydraulic cylinder, the piston 62 is moved downwardly to move the clutch applying plate 1| in a direction to apply the lower clutch 55 to connect the lower drum 49 to the drive shaft'52. It is accordingly evident that the hoisting drums 48 and 49 may be selectively connected in driving relation with the motor 30 and are driven from the 4motor through the spur 'tical drive shaft 52.

In this illustrative construction, mounted within the rearward portion of the hoist body 5 is a controller and resistance box 85 connected by an electrical conductor cable 55 to a switch and fuse box 31, and an electrical conductor cable 55 to the motor 39. Arranged at opposite sides of the hoist body and rigidly xed within the side tread frames between the latter and the diil'erential housing is a pair of hydraulic anchor jacks 89 each comprising a vertical hydraulic cylinder 99 containing a vertically reciprocable piston .9| having an upwardly extending piston rod 92 passing through a packed opening in the upper cylindenhead 93. The upper end of the piston rods 92 are provided with abutment engaging points 94 for engagement with a suitable extraneous abutment, i'or instance the mine roof, for rigidly jacking the hoist in a stationary operating position against the mine floor.

'I'he means for supplying hydraulic pressure to the jack cylinders 90 and the operating cylinder 5I for the drum control clutches comprises a hydraulic pump 95, preferably of a conventional triplel rotortype, attachedto the gear housing 53 and having a pump chamber 91 containing intermeshing pump rotor gears 95, one of which is keyed to the projecting end of the longitudinal drive shaft 55, as shown in Fig. 5. The chamber within the gear housing 53 provides a reservoir 99 for containing a liquid, and this pump is adapted to pump liquid under pressure from the reservoir through suitable passages and conduits, to be later described, to the hydraulic cylinders above referred to. Now referring to the hydraulic fluid system and the associated control means shown in Figs. 8 and 9, it will be observed that the discharge chambers of the rotors of the pump 55 are connected through conduits |00 and LUI respectively, to a by-pass valve device |02,

` 8,165,895 and a return conduit |02 connects the by-pass valve device to the reservoir 99. The main supply conduit |04 leads from the by-pass valve device to a control valve box |05. As shown' in Fig. 9, the by-pass valve device .|02 comprises a valve box |08 having a passage |01 connecting the conduit |00 to the conduit |04. A parallel a: 1 |00 communicates with the conduit III and is connected by a passage |09 to the :s: Formed in the valve box is a chamber ||0 communicating with the conduit |02 and connected by a passage to the passage |05. The passages |09 and are controlled by end seating valves II2 and II3 respectively, having a pivoted control lever I I4. .when the valves I I2, I I3 are in the position shown in Fis. 9', passages |01, |00 are connected together by the passage |00 so that both conduits |00 and IIII communicate with the conduit |04. When the control lever I I4 is swung into its' opposite position, the passage |05 is cl by the valve |I2, while the 'passage is ope .so that the.conduit |0| communicates with the return conduit |03 through passage and .chamber IIII and the. conduit '|00 communicates through. the passage |01 with the conduit |04. Again referring to Fig. il, it will be noted that the control valve box |05 has parallel vertical bores ||5 containing rotary control valves I I5 and- I f respectively, each having a manual control hanv30 K vnected by a supply passage ||8 with which the dle. 'I'he lower ends of the valve bores are conbers 10, 69 inthe block 51', 65, respectively, (see 'L 'I'he hoisting -ca'bles 50 and 5| are then extended also Fig. 6) with the bore of the valve ||5. The valve controls the supply of liquid pressure to the anchor jack cylinders, and the valve bore is connected by a conduit |22 and branch conduits |22 to theupper ends of the anchor jack cylinders, while the valve bore is connected through a conduit |24 and branch passages |25 to the lower ends of the anchor jack cylinders. When the valve IIB is in the position shown in Fig. 8, 4liquid under pressure may ow 'from the, `supply passage I I8 through a passage on the valve IIS, conduit |20, chamber 10, tubular rod 50 and passage 'I9 in the piston 62 to the lower end of the clutch control cylinder 0|, thereby to eiIect up'- ward movement of the piston 52 to apply the liriction clutch 54 for the upper hoist drum 40, while the upper end of the cylinder 5| is connected to exhaust through passages 00, tubular rod 52, chamber 69, conduit |2| anda passage on the. valve ||6 communicating with the discharge passage IIB. When the position of the valve' III is reversed, liquid under pressure may iiowztrom the supply passage ||8 through a vpassage on theA valve IIB, conduit |2|, chamber 69, tubular rod G3 and passages 80 to the upper end of the hydraulic cylinder 6I to veffect downward movement of the piston 62 to apply the friction clutch 55 for the lower hoisting drum, while the lower end of the cylinder 6| `is connected through e IIT.-

chor jack pistons in an anchoring position, while the upper ends o! the anchor jack cylinders are connected through the branch conduits |22, con- -duit |22 and a e on the valve to the discharge e III. When the position of the valve ||1 is reversed, liquid under pressure may ow from the supply e III through a passage on the valve, conduit |22 and branch con duits |22 to the upperV ends of the jack cylinders to effect downward movement of the anchor jack pistons into their released position, while the lower ends of the jack cylinders are connected through branch` conduits |25, conduit |24, a passage on the valve to the discharge passage ||0. When the valves III, III are moved into their closed position, the liquid is trapped in the cylinders, and when liquid ilow through the supply conduit |04 is cut on by the valves Ill, Ill, the liquid discharged from the pump is by-pass'ed through the by-pass valve device back to the res'- Vervoir 5 5. When both conduits |00and |0| are connected with the conduit |04, the pressure in the hydraulic system is, of course, increased, since liquid is pumped at that time from both discharge chambers of the pump. 1 s' The ge'neral mode of use of `the improved hoisting mechanism will be clearly apparent from the description given. 'I'he hoisting mechanism is propelled about the mine over the mine floor by the endless track-laying treads under the control of the i'rictionally controlled planet gears ofthe change speed 'mechanism at the desired Ispeed. When the working place is reached, the -hoisting mechanism is rigidly jacked in a stationary operating position against the mine iloor by means of the hydraulic anchor jacks engaging an extraneous abutment such'as the mine roof.

from the hoisting drums 45 and 4! tothe drag scraper mechanism to be moved thereby, and one Yor the other ofthe friction clutches 54, 55 is applied to cause one cable to be wound in by its' drum while the other cable is paid out by its drum. Other uses and advantages of the improved hoisting mechanism will be clearly apparent to those skilled in the art. Y

.While there is in this application speciilcally described one form which the invention may assume in'practice, it will be understood that this form of the same is shown for purposes of illustration and that the invention may be modiiled and embodied in various other forms without departing from. its spirit or the scope oi theap-V pended claims.. 4

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

l. In a hoisting mechanism, a base, relatively rotatable hoisting drums mountedon .said base, a motor on said base,l means driven by said motor for driving said drums, Va hydraulic pump driven by said motor, and hydraulic means operated by pressure iiuid discharged from. said pump for controlling the connection of said drums with saiddrumdriving means.

2. In a hoisting mechanism, a base, relatively rotatable hoistingdrums arranged in superimposed coaxial relation on said base, a'motoron said base, means driven by. said motor for driving said drums, a hydraulic pump driven by said motor, and hydraulically operated means .oper- Vand means for operating said clutches including clutch operating connections arranged coaxially with said tubular drive shaft, and motor means arranged at least in part within said tubular shaft for actuating said coaxial clutch operating connections.

4. In a hoisting mechanism, relatively rotatable cable windlng drums, `a tubular drive shaft coaxial therewith, friction clutches for selectively connecting said drums in driving relation with said tubular drive shaft, and hydraulically operated means for operating said clutches including a cylinder arranged coaxially with said tubular drive shaft and arrangedfat least in part within the latter, and a clutch operating piston reciprocable within said cylinder;

5. In a hoisting mechanism, relatively rotatable cable winding drums, a tubular drive shaft coaxial therewith, clutches for selectively connecting said drums in driving relation with said tubular drive shaft, hydraulically operated means for operating said clutches including a cylinder arranged coaxially with said tubular drive shaft at one'end of the latter and a clutch operating piston reciprocable within said cylinder, and a connection at the 'opposite end of said shaft for conducting hydraulic pressure from a source of pressure supply to said cylinder.

6. In a hoisting mechanism, relatively rotat-v able cable winding drums, a tubular drive shaft coaxial therewith, clutches for selectively connecting said drums in driving relation with said tubular drive shaft. hydraulically operated means including a cylinder arranged coaxially with said tubular drive shaft at one end of the latter and a piston reciprocable within said cylinder and having a piston rod extending centrally within said shaft for operating said clutches, and a connection at the opposite end of said shaft for supplying hydraulic pressure -to said cylinder and including passage means formed in said piston rod.

7. In a 'hoisting mechanism, a frame having a horizontal top surface, a'drive shaft arranged on a vertical axis and journaled in said frame. the upper end portion of said shaft projecting above the top surface of said frame, a pair of relatively ,rotatable cable winding hoisting drums arranged in superimposed coaxial relation above the top surface of said frame, said drums having hoisting cables respectively wound thereon, said drums surrounding and journaled on the upwardly projecting portion of said shaft, a driving gear arranged within said frame for driving said shaft, friction clutches arranged within said drums and operable at will for connecting said drums to said shaft for driving thereby.

8. In a hoisting mechanism, ay portable base having traction means, the forward portioni of said base projecting horizontally in advance of said traction means, a pair of relatively rotatable cable winding hoisting drums arranged in superimposed coaxial abutting relation on the top of said forwardly projecting base portion, said drums having hoisting cables respectively Wound thereon, a motor on said base, means driven by said motor for driving said drums including a vertical drive shaft journaled within said projecting base portion and having a portion projecting upwardly above the top of said projecting base portion, bearing means for journaling said drums on said projecting shaft portion, and friction'clutches within said drums and operable Vat will for only alternately connecting the latter to said shaft for driving thereby.

JOSEPH F. JOY.

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