GB2107758A - Mineral-mining shearer loader - Google Patents

Abstract

The shearer loader comprises, mounted at the opposite ends of a body (1), two arms (2, 3) with a drum (6, 7) mounted on each one of said arms, and a drive rotating said drum (6, 7) and having three motors (15, 16, 17), each one of two (15, 17) of said motors setting to rotation its own respective drum (6, 7) while the third motor (16) is connected by means of a mechanism (18) not shown designed to change the kinematic interconnection of the motors (15-17) to that one of the motors (15, 17) which sets to rotation the drum (6 or 7) comprising first in the direction of the extraction movement. All of the motors (15-17) are mounted in the body (1) of the shearer loader. <IMAGE>

Description

SPECIFICATION Shearer loader for the extraction of minerals The present invention relates to means for mining minerals and, more particularly, it relates to shearer loaders for the extraction of minerals.

This invention can be used in application to the mining of minerals deposited mainly in thin beds, preferably, coal and rock salt.

It is an object of the present invention to develop a shearer loader for the extraction of minerals, wherein the irrational consumption of power supply would be reduced.

It is another object of the invention to increase the amount of power available per shearer loader under conditions of mining in thin beds, i.e., beds as thin as 0.65 m.

Said and other objects of the invention are attained owing to the fact that in a shearer loader for the extraction of minerals, wherein heightadjustable arms are mounted at the opposite ends of a body reciprocating in the course of extraction, each one of said arms carrying on the shaft thereof a drum rotated by means of a drive kinematically coupled with both said arms and having two motors mounted in the shearer loader body, while said drums are set at different height levels for cutting the bed of minerals, according to the present invention, the drum drive is made such that each one of its motors sets to rotation its own respective drum and is kinematically coupled with the latter while the drivc is provided wit;; ane more motor mounted in the body and, in the course of the extraction of minerals, connected by means of a mechanism designed to change the kinematic interconnection of the motors to that one of the motors which sets to rotation the drum coming first in the direction of extraction movement.

Such an arrangement provides, under conditions of increase power of the shearer loader, a possibility of rational consumption of the power supply, i.e., of a sharp increase of the power of the drive of that particular drum which is the first to cut the bed and bears the main load of cutting the bed, while leaving unvaried the power of the drive of the other drum which is less loaded at the moment.

It is expedient that all of the motors of the drum drive be positioned in the body such that their output shafts generating the torque for the rotation of the drums be arranged in parallel and in one and the same plane relative to the shearer loader body.

The mechanism designed to change the kinematic interconnection of the motors may include two intermediate gearwheels capable of moving in the plane of their rotation, each secured on a crank and positioned so as to ensure the connection of the motors in pairs.

Each crank may be connected via reducing gear to a shaft made such that its free end extends outside of the shearer loader body; while so doing, it is expedient that such free ends be articulated to a tie rod.

It is further expedient that the mechanism designed to change the kinematic interconnection of the motors be provided with stops designed to limit the movement of each intermediate gearwheel to a preset position, both said stops mounted in the shearer loader body.

Such an arrangement of the drum drive made it possible to develop a shearer loader capable of reliable operation under conditions of beds as thin as 0.65 m and characterized by the amount of power available per shearer loader sufficient to meet present-day requirements imposed on like machines.

Other objects and advantages of the present invention will be more apparent upon considering the following description of embodiments thereof, with due reference to the accompanying drawings in which: Fig. 1 is a diagrammatic view of the shearer loader for the extraction of minerals, according to the invention; Fig. 2 - ditto, a section taken along the line Il-Il of Fig. 1; Fig. 3 is a mechanical diagram of the shearer loader according to the invention; Fig. 4 illustrates the drive of shearer loader drum, according to the invention, in longitudinal section; Fig. 5 is a section taken along the line V-V of Fig. 4, illustrating the kinematic interconnection of motors for the right-hand drum, according to the invention; and Fig. 6 is a section taken along the line V-V of Fig. 4, illustrating the kinematic interconnection of motors for the left-hand drum, according to the invention.

Referring now to Fig. 1 of the accompanying drawings, the shearer loader for the extraction of minerals, according to the invention, comprises a body 1 made capable of reciprocation in the direction shown by arrows A. Mounted at the opposite ends of the body 1 are height-adjustable turning arms 2, 3 each provided with a drum 6, 7 mounted on a shaft 4, 5 thereof, designed for cutting the mineral. The body 1 carries a portal frame 8 and hydraulic supports 9 by means of which the shearer loader rests against a face conveyor 10 (Fig. 2). However, shearer loader may be made without a portal frame.

The shearer loader is moved relative to the conveyor 10 by a haulage unit 11 whose design may vary. However, in the preset embodiment, use is made of a haulage unit 11 including a flexible traction member such as chain 12 connected with the frame 8 and two drives 1 3 located outside of the working face in the drift. The chain 12 is laid down in a chute 14 on the edge surface of the face conveyor 1 0.

The drums 6, 7 are rotated by means of a drive kinematically coupled with both drums 6, 7 and having three motors 15, 16 and 17 (Fig. 1) mounted in the shearer loader body 1 and a mechanism 1 8 designed to change the kinematic interconnection of the motors 1 5, 1 6 and 1 7.

The motors 15, 1 6 and 1 7 are positioned in the body 1 such that their output shafts 1 9, 20 and 21 (Figs. 1, 3) generating the torque for rotating the drums 6, 7 are arranged in parallel and in one and the same plane relative to the body 1.

The motor 1 5 is connected to a shaft 22 of the drum 6 by means of a reducing gear 23, while the motor 17 is connected to a shaft 24 of the drum 7 by means of a reducing gear 25. A gearwheel 26 is set on the output shaft 20 of the motor 1 6.

The mechanism 1 8 (Figs. 3 and 4) includes two intermediate gearwheels 27, 28 secured on respective cranks 29, 30 and, therefor, capable of moving in the plane of their rotation. The cranks 29, 30 are positioned in recesses 31 (Fig. 4) in the body 1.

Also secured on the cranks 29, 30 are gearwheels 32, 33 meshing with gearwheels 34, 35, respectively. The gearwheels 34, 35 are secured on respective turning shafts 36, 37 made such that their free ends 38, 39 extend outside of the shearer loader body 1, as seen especially clearly in Fig. 4. Secured on said free ends 38, 39 are arms 40 articulated by means of hinges 41 to a tie rod 42 provided with a handle 43.

Thanks to the provision of the turning shafts 36, 37 and cranks 29, 30, the intermediate gearwheels 27 and 28 are capable of performing arcuate movements in the plane of their rotation for engagement and disengagement with gearwheels 44 and 45 of the reducing gear 23 and via gearwheel 46 of the reducing gear 25. In order to obviate the need for simultaneous kinematic interconnection of all three motors 15, 16 and 17, provision is made for a kinematic coupling of the motor 16 with only one of the motors 1 5 and 1 7 and for a simultaneous interruption of the kinematic coupling of the motor 16 with the other one of the motors 17 and 1 5, as illustrated in Fig. 4, 4, as well as in Figs. 5 and 6.

To this end, the relative position of the cranks 29, 30 is selected such that, upon simultaneously turning the latter, there occurs first a disengagement, say, of the gearwheel 27 from the gearwheel 44, and only after that - an engagement of the gearwheel 28 with the gearwheel 46. A simultaneous turning of the cranks 29, 30 is ensured by the tie rod 42 articulating the outlet ends 38, 39 of the turning shafts 36, 37. In this manner, there are ensured, in succession, first a disengagement of the previously engaged mechanism 1 8 from one of the reducing gears 23 or 25, and then its engagement with the other one of the reducing gears 25 or 23.

The mechanism 1 8 is also provided with stops 47 and 48, 49 and 50 (Figs. 5 and 6) designed to limit the movement of the intermediate gearwheels 27, 28, respectively, to a preset position. The stops 47 through 50 are mounted in the body 1.

The reducing gears 23 and 25 are made similar to each other and of a conventional type, each including gearwheels 51,52, 53, 54, 55, 56, 57, 58, 59 and gear type couplings 60.

The shearer loader of the present invention operates in the following manner.

Upon the shearer loader movement in the face from left to right (Fig. 1), the right-hand drum 7 coming first in the direction of the shearer loader movement will consume more power than the left-hand (rear) drum 6. Hence, the need to supply more power to the right-hand drum 7. To this end, the handle 43 attached to one of the arms 40 is used to crank the shafts 38, 39 of the mechanism 1 s. As a result, the intermediate gearwheel 27 comes out of engagement with the gearwheel 44 of the motor 1 5, whereupon the intermediate gearwheel 28 comes in engagement with the gearwheel 46 of the right-hand motor 1 7.At the same time, the intermediate gearwheels 27 and 28 during their arcuate movements stay constantly in mesh with the gearwheel 26 of the motor 1 6. This position is shown in Fig. 5. In this manner, direct kinematic coupling of the motor 1 6 with the right-hand motor 1 7 is effected, and the summary power of said motors 17 and 16 is transmitted via the reducing gear 25 to the righthand drum 7. In so doing, the left-hand motor 1 5 acts via the reducing gear 23 to set to operation the left-hand drum 6.

Upon reversai of the shearer loader movement in the face frorn right to left, the left-hand drum 6, which now comes first in the direction of the shearer loader movement is to consume more power than the right-hand drum 7.

By means of the same handle 43, the shafts 38, 39 are cranked in the opposite direction. In so doing, the intermediate gearwheel 28 comes out of engagement with the gearwheel 46 of the right-hand motor 17, whereupon the intermediate gearwheel 27 comes in engagement with the gearwheel 44 of the left-hand motor 1 5. This latter position is shown in Fig. 6. As a result, direct kinematic coupling of the motor 16 with the lefthand motor 1 5 is effected, and the summary power of the motors 1 5 and 1 6 is transn;itted via the reducing gear 23 to the eft-hand drum 6. The right-hand motor 17 acts via the reducing gear 25 to set to operation the right-hand drum 7.

it is to be understood that electric ydraulic and compressed air motors can be used as the motors 1 5, 1 6 and 17.

The use of the present invention helps successfully solve a series of problems, namely: - to increase the output of the shearer loader without increasing the overall length and height of the latter; -to ensure the optimum distribution of installed power between the two drums, in particular, to provide for the supply of more power to the drum coming first in the direction of the shearer loader movement; and - to develop a shearer loader for the extraction of minerals deposited in thin beds, equipped with a powerful drive.

Claims (7)

1. A shearer loader for the extraction of minerals, comprising a reciprocating body: heightadjustable arms mounted at the opposite ends of the body; drums set each on the shaft of the respective arm, said drums being set at different height levels for cutting a bed of mineral; a drive rotating both drums and kinematically coupled therewith, said drive having three motors of which the first and second motors are kinematically coupled with the respective drums while the third motor is connected by means of a mechanism designed to change the kinematic interconnection of the motors to that one of the motors which sets to rotation the drum coming first in the direction of the extraction movement.

2. A shearer loader according to Claim 1, wherein all of the motors of the drum drive are positioned in the body such that their output shafts generating the torque for the rotation of the drums are arranged in parallel and in one and the same plane relative to the shearer loader body.

3. A shearer loader according to Claim 1 or 2, wherein the mechanism designed to change the kinematic interconnection of the motors includes two intermediate gearwheels capable of moving in the plane of their rotation, each secured on a crank and positioned so as to ensure the connection of the motors in pairs.

4. A shearer loader according to Claim 3, wherein a shaft is connected to each crank via reducing gear, said shaft being made such that its free end extends outside of the shearer loader body.

5. A shearer loader according to Claim 4, wherein the free ends of both shafts, extending outside of the shearer loader body, are articulated to a tie rod.

6. A shearer loader according to any one of Claims 3 to 5, wherein the mechanism designed to change the kinematic interconnection of the motors is provided with stops designed to limit the movement of each respective intermediate gearwheel to a preset position, both said stops being mounted in the shearer loader body.

7. A shearer loader substantially as described herein with reference to the accompanying drawings.