US2263779A - Mining machine - Google Patents

Description

NOV. 25, 1941. J EFFREIY ETAL 2,263,779

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Nov. 25, 1941. R. K. JEFFREY ETAL 2,253,779

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R. JEFFREY ET AL MINING MACHINE Filed May 6, 1938 18 Sheets-Sheet l8 lilwl filial f/Vl/ENTOEJ.

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LEWIS E. M \TCHELL.

Patented Nov. 25, 1941 MINING MACHINE Robert K. Jefirey and Lewis E. Mitchell, Columbus, Ohio, assignors to The Jei'l'rey Manufacturing Company, a corporation of- Ohio Applicatiiln May 6, 1938, Serial No. 206,448

20 Claims.

This invention relates to a mining machine of the universal type and one of the objects of the invention is to provide an improved and eflicient device of the type capable of cutting kerfs in any one of a plurality of intersecting or paral-' lel planes including horizontal planes at any elevation between a relatively high roof and the floor of a mine room and also including vertical or shearing kerfs in any vertical plane between relatively widely spaced apart ribs or side walls of a mine room.

Another object of the invention is to provide a mining machine of the universal type which has a'wide range of operation and which can be operated with safety, a high'degree of efliciency and economy in mines where the available space is relatively small or where the available space is relatively large.

Another object of the invention is to provide a mining machine of the universal type which can be operated to cut kerfs in any plane between the extreme limits and which can be quickly and easily handled and adjusted with a minimum of manual eilort.

Another object of the invention is to provide a mining machine in which cutting mechanism is adapted to be fed in a vertical plane by means of a hydraulic system which includes an equalizing relief valve mechanism which compensates for the unequal displacement in the hydraulic system thereby permitting the cutter bar to float while cutting on a curved portion of the track.

Another object of the invention is to provide a mining machine in-which the mining mechanism is fed through the material to be mined at a predetermined maintained speed by means of an hydraulic system which speed can be adjusted to any one of a plurality of values.

Another object of the invention is to provide a mining machine in which an adjustable kerf cutter support includes a cylindrical bearing through which the drive for a kerf cutter extends in which the cylindrical bearing has sleeves which'maintain the driv gearing enclosed irrespective of adjustment of the keri cutter.

Still another object of the invention is to provide a mining machine with a hydraulic motor in which the flow of hydraulic fluid to the motor is relatively free while the flow of hydraulic fluid from the motor is restricted.

' Another object of the invention is to provide an improved construction for conduits leading to a pivotally mounted hydraulic piston type motor.

Another object of the invention is to provide an improved control mechanism for a hydraulic control system of a mining machine.

Another object of the'invention is to provide improved means for effecting continuous hydraulic connections between relatively movable parts of a mining machine.

Another object of the invention is to provide -an improved hydraulic control system particularly useful in connection with mining machines.

Another object of the invention is to provide an improved construction for effecting the connection of a plurality of flexible hydraulic conduits to a rotating element of a hydraulically controlled mining machine.

A furtherobject of the invention is to provide a hydraulic control system with pressure equalizing means whereby the piston of the hydraulic piston type motor will notlock. Other objects of the invention will appear hereinafter, the novel features and combinations being setforth 'in the appended claims.

In the accompanying drawings:

Fig. 1 is a plan view of .the rear end of the mining machine comprising our invention;

. Fig. 2 is a continuation of Fig. 1 showingthe central portion of the mining machine of our invention;

Fig. 3 is a continuation of Fig. 2 showing the forward end of the mining machine with the kerf cutting mechanism cut short;

Fig. 4 is a side elevational view of the rear portion of our mining machine;

Fig. 5 is a combined side elevational and sectional view of the central portion of our device;

Fig. 6 is a longitudinal sectional view oi the forward portion of our device with the kerf cutting mechanism again shown cut short;

Fig. 7 is an enlarged sectional, detail taken on the line 1-1 of Fig. 2, looking in the direction of the arrows;

Fig. 8 is a combined side and sectional elevational view showing the construction of a hydraulic piston motor;

Fig. 9 is a transverse sectional view taken on the line 9-9 of Fig. 8; 1

Fig. 10 is a transverse sectional and elevational view showing a plurality of control valves and operating means therefor;

Fig. 11 is a side view of one of the control devices of Fig. 10; v

Fig. 12 is a side view of another of the control devices of Fig. 10;

Fig. 13 is an enlarged segmental sectional view of the improved piston construction of a hydraulic piston motor comprising our invention;

Fig. 14 is an end elevational view of the structure illustrated in Fig. 13;

Fig. 15 is a plan view of the truck of the mining machine of our invention showing portions in section;

Fig. 16 is an enlarged sectional view of an actuating element of one of the piston motors comprising a feature of our invention;

Fig. 17 is a transverse sectional elevational view of an eleyating hydraulic piston motor taken on the line of Fig. 2 looking in the direction of the arrows;

Fig. 18- is a combined sectional and plan view of a portion of our device;

Fig. 19 is a transverse sectional view through the head of the mining machine of our invention taken approximately on the line |9--|9 of Fig. 6, looking in th direction of the arrows;

Fig. 20 is a transverse sectional view taken on the line 2020 of Fig. 6, looking in the direction of the arrows;

Fig. 21 is a transverse sectional elevational view taken on the line 2|2| of Fig. 1 of the drawings, looking in the direction of the arrows;

Fig. 22 is a sectional elevational view .taken on the line 22-42 of Fig. 1, looking in the direction of the arrows;

Fig. 23 is a sectional elevational view of the volume control of our invention;

Fig. 24 is a sectional elevational view of B. volume relief pilot valve of our invention;

Fig. 25 is a transverse sectional elevatlona view taken on the line 25--25 of Fig. 1, looking in the direction of the arrows;

Fig. 26 is a longitudinal sectional elevational view showing the drive for the truck and taken on line 2626 of Fig. 25 looking in the direction of the arrows;

Fig. 27 is a transverse sectional view taken on the line 21-21 of Fig. 1, looking in the direction of the arrows;

Fig. 28 is a sectional elevational view taken on the line 28-28 of Fig. 27, looking in the direction of the arrows;

Figs. 29 and 30 are sectional elevational views taken on the lines 29-49 and 30-30, respectively, of Fig. 27, looking in the direction of the arrows;

Fig. 31 is a transverse sectional elevational view taken on the line 3|3| of Fig. 5, looking in the direction of the arrows;

Fig. 32 is a side elevational view of a detail of the apparatus shown in Fig. 31;

Fig. 33 is a sectional view showing in detail the rope anchorage and tension means of Fig.

Fig. 34 is a longitudinal elevational sectional view taken on the line 34-34 of Fig. 31, looking in the direction of the arrows;

Fig. 35 is a transverse sectional view taken on the line 35-35 of Fig. 34, looking in the direction of the arrows;

Fig. 36 is a sectional view showing the construction of the control valves for the hydraulic motors;

Fig. 36 is a sectional view similar to Fig. 36;

Fig. 37 is a sectional plan view through the electric motor for driving the kerf-cutting mechanism;

Fig. 38 is a sectional elevational view of the equalizing relief valve comprising a feature of our invention;

Fig. 39 is a diagrammatic illustration of the hydraulic control system;

- from a straight track;

Fig. 45 is a diagrammatic plan view showing the range of vertical kerfs which may be cut by our mining machine; and

Fig. 46 is a sectional view taken on the line 4646 of Fig. 6, looking in the direction of the arrows.

The mining machine comprising our invention is mounted upon a truck 45 best seen in Figs. 5 and 15 of the drawings comprising a main frame formed by spaced apart longitudinally extending frame members 46, 46 which are laterally spaced apart and between which extend transversely extending forward plate 41 and transversely extending rearward plate 48 (Fig. 4) and intermediate transversely extending bolster members 49 and 50 (Fig. 5). All of said main frame members 46 to 50, inclusive, are rigidly attached together to form a strong main frame for the truck 45. Said main frame is supported upon a forward axle 5| and a rear axle 52 which axle 5| is slidably journaled in adjustable journal boxes 53, 53 which may be longitudinally adjusted by adjusting screws 54, 54 to adjust the tension of the driving chain, as hereinafter described. To assure movement of the axle 5| in parallelism the adjusting screws 54, 54 are connected to rotate together by chain'and sprocket mechanism 55.

The journal boxes 53, 53 are held in the main frame against longitudinal movement but provide for limited vertical movement thereby to permit the shaft 5| to move relative to the longitudinal axis of the truck 45 to provide a modified three point suspension for said truck 45 so it may readily accommodate itself to the unevenness of the mine tracks over which the mining machine travels.

The rear end axle 52 is rigidly Journaledto the main frame of the truck 45 by appropriate Journal bearings 56, 56 (Fig. 15). The axles 5| and 52 are provided with appropriate driving and supporting track engaging flanged wheels 51 all of which are keyed to the respective axles 5| and 52 by keys 58. The axles 5|, 52 are connected to rotate in unison-by chain and sprocket mechanism 59. It is thus evident that any driving force supplied to axle 52, ashereinafter described, will be transmitted to all four of the Wheels 51 thereby insuring a maximum of traction for propelling the mining machine which is particularly desirable during sumping operations. It is, of course, evident that the afore-described adjusting screws 54 (Fig. 5) provide for the tensioning of the chain and sprocket mechanism 59 by the forward and rearward adjustment of the axle 5|.

Associated with the rear axle 52 is a brake mechanism (Fig. 5) comprising a brake drum 60 keyed to shaft 52 with which is associated a pair of brake shoes 6| pivoted to a casting 62 carried by bolster 50, to the rearward free ends of which is associated a clamping mechanism 63 operable by a brake lever 64 (Fig. 4) pivoted adjacent the rear end of the mining machine on pivot. 69 and

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