RU2234600C2 - Mining machine - Google Patents

Abstract

FIELD: mining industry, particularly for underground mining operations with the use of narrow-cut mining breakage machine.

SUBSTANCE: machine comprises body including feeding mechanism and electric unit. Ranging arms with electric motor drives and helical operation tools are installed at ends of electric unit. Torsion shafts are located at ranging arms transmission parallel to electric motor drives. The first ends of torsion shafts are movably connected with driving wheels. The second ends thereof are connected by means of half-couplings with follower gear wheels of ranging arms and have rotary gripping means. Rotary gripping means are fixable in extreme positions and have arms and spines for ranging arms transmission during carrying out repairing operations. Half-couplings have safety shear pins secured in replaceable bushings.

EFFECT: reduced dynamic loads applied to rotary reducers transmission in feeding mechanisms, increased reliability and service life.

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Description

The invention relates to mining and can be used for the extraction of minerals by underground mining, namely to narrow narrow-cut shearers.

A narrow narrow-belt treatment plant is known, which includes cutting gearboxes with electric motors and actuators, supplying gearboxes with gears, shafts and driving sprockets, a pump unit and an electric block, bearings on which the combine body is mounted above the conveyor head (see 1KShE combine, cleaning combines unified series of RKU. Reference book. Machines and equipment for mines and mines. M., MGGU, p.126-137, 2000).

In a known solution, electric motors are installed in the main body of the combine. This design solution has a long kinematic chain, bevel gears, which leads to low reliability of combines.

The closest to the proposed technical essence and the achieved result is a mountain combine, comprising a housing consisting of 2 feeding mechanisms, an electrical unit with a pump unit, at the ends of which rotary gearboxes with electric motors and with executive bodies are installed (see KSP combine. Reference book. Machines and equipment for mines and mines M., MGGU, p.143-144, 145-147, 2000) - taken as a prototype.

The known solution has several disadvantages.

So the rotary gearbox has a disadvantage due to the fact that it does not have a mechanical safety link. In case of accidentally hitting the visor of the mechanized roof support under difficult mining and geological conditions, the rotary gearbox, screw actuator, cutting tool, electric drive motor, and control system fail, which entails significant material and financial losses.

The present invention solves the problem of reducing dynamic loads of low and high frequencies in the transmission of rotary gears, loads in the feeding mechanisms, the cost of the combine, increasing the reliability, resource of the combine.

To achieve the specified technical result in a mining machine, comprising a housing consisting of feed mechanisms and an electric unit, at the ends of which rotary gearboxes with drive electric motors and screw actuators are installed, torsion shafts are installed in the transmission of rotary gearboxes parallel to the drive electric motors, one ends of which are movably connected to drive wheels, and others by means of coupling halves having safety shear pins fixed in replaceable bushes, connecting They are equipped with subsequent gears of rotary gearboxes and are equipped with movable rotary gripping devices installed with the possibility of fixing in extreme positions, having handles and splines for turning the gearbox transmission during repair work.

The causal relationship between the totality of the claimed essential features of the invention and the technical result achieved is as follows.

Distinctive features “in the transmission of rotary gearboxes, torsion shafts are installed parallel to the drive electric motors, some ends of which are movably connected to the drive wheels. Others, by means of half couplings having safety shear pins fixed in replaceable bushes, are connected to the next gears of the rotary gearboxes and equipped with lockable ones extreme positions with movable rotary gripping devices having handles and splines for turning the transmission gearbox during repair work "they allow the use of serial electric motors without torsion shafts, to create a rotary gearbox with smaller overall dimensions in height and with a significant torsion angle of rotation with a sufficiently high transmitting torque, which helps protect the transmission of the combine from high-frequency loads and dramatically reduce the cost of the combine. In addition, combine the purpose of the torsion shaft with the function of disabling the transmission of the rotary gearbox during repair, since safety requirements require this provision. This design allows you to protect the gearbox from low-frequency loads, which protects both the mechanical and electrical parts of the combine from breakdowns, which is very important when developing combines with a high resource, as well as in the case of transmission overload, pin cutting takes place without jamming the coupling halves.

The proposed solution allows the torsion shaft to be firmly fixed in the working and inoperative positions of the screw actuators and, in addition, this design is compact and economically advantageous.

The proposed mining machine is illustrated by drawings.

Figure 1 shows a General view of the harvester from the side; figure 2 - rotary gearbox on the side; figure 3 is a horizontal section along aa of the transmission of the rotary gearbox in figure 2.

The extraction combine includes a casing consisting of feed mechanisms 1 and 2, an electric unit 3, rotary gears 4 and 5, screw actuators 6 and 7, wiper blades 8 and 9. Electric motors 10 and 11 are installed on the rotary gears 4 and 5. The electric motor 10 is connected with gear 12 through a wheel 13 with a torsion shaft 14, which has one splined end 15 and the other splined end 16, on which a movable gripping device is installed, including a bearing 17, fixed by a washer 18 and bolts 19, a yoke 20 with a handle 21, which is fixed in open 22. The splined end 15 of the torsion shaft 14 is connected, thanks to the teeth with the wheel 13, its other end 16 is also engaged with the help of the teeth with the coupling 23, which is connected by the coupling half 24, using shear pins 25 installed in the bushings 26, with the subsequent gear 27. At the end of the torsion shaft 14 there are splines 28.

Mining combine works as follows.

The rotary gearboxes 4 and 5 with the actuators 6 and 7 are turned on. Then, controlling the electric unit 3 of the combine, if necessary, raise or lower the screw actuators 6 and 7. Next, turn on the feed mechanisms 1 and 2 and the combine receives translational movement along the conveyor head. When the combine is working in the face, there are solid inclusions of various sizes. With insignificant sizes of solid inclusions, the transmission of rotary reducers is loaded and the torsion shafts of rotary gearboxes are turned on, which soften the loads on the entire transmission of rotary gearboxes, including their drive motors 10 and 11. This is done by twisting and then untwisting the torsion shafts. At overloads for which the transmission of rotary gearboxes is not designed, the torsion shafts twist, and when the torque is exceeded, the shear pins 25 are cut off, the kinematic chain is interrupted, the torque is not transmitted from the electric motors 10 and 11 to the transmission of the rotary gearboxes, the actuators 6 and 7 stop. Further, thanks to the tuned control system for a specific current, the motors are turned off. To replace the pin 25, a gripping device is used, with which the spline end 15 of the torsion shaft 14 is disconnected from the wheel 13, while the motor circuit 10 is mechanically broken from the coupling halves 23, 24, from which the cut pins 25 are removed.

Claims (1)

A mountain harvester comprising a housing consisting of feed mechanisms and an electric unit, at the ends of which rotary gearboxes with drive electric motors and screw actuators are installed, characterized in that torsion shafts are installed in the transmission of rotary gearboxes parallel to the drive electric motors, one ends of which are movably connected to the drive wheels and others by means of half-couplings having safety shear pins fixed in replaceable bushings are connected to subsequent gears by the door gearboxes and are equipped with movable rotary gripping devices installed with the possibility of fixing in extreme positions, having handles and splines for turning the transmission of the gearboxes during repair work.

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