RU2838019C1 - Mining combine - Google Patents

Abstract

FIELD: mining equipment.

SUBSTANCE: mining combine comprises a frame on which a tracked undercarriage is mounted, including left and right tracked drives, a conveyor, a lower cutting and loading device designed with the possibility of lowering to ground level, and a rotary actuator with a drive. Said actuator drive comprises bearing structure with front and rear brackets designed to be articulated with hydraulic cylinders. Said frame comprises front and rear supports. Hydraulic cylinders are fitted in said supports and appropriate brackets. Said front supports are located on outer side of said tracked drives, and said rear supports are located on inner side of said tracked drives.

EFFECT: increased dynamic stability of the combine, reduced vibration loads and self-oscillations.

2 cl, 4 dwg

Description

Field of technology to which the invention relates

The invention relates to the field of mining engineering and can be used in the design of mining machines.

State of the art

A heading machine is known (patent US 2757917 A), comprising an actuator with two rotors, a main frame, hydraulic cylinders for lifting the actuator relative to the main frame, wherein the connection between said hydraulic cylinders and the main frame is characterized by the possibility of transmitting axial loads from the rotors of the actuator arising during face processing only to said hydraulic cylinders, while for the actuator to perceive transverse and longitudinal loads from the rotors of the actuator arising during face processing, an inclined lever is provided, extending from the actuator and equipped with two hydraulic cylinders located between it and the main frame of the combine, as well as a means for limiting the movement of said inclined lever in the horizontal plane made in the form of guide posts installed in cylindrical guides located on the main frame of the combine. A disadvantage of this combine, taken as a prototype, is the presence of increased bending loads on the housing of the actuator gearbox arising during the lifting of the actuator.

The essence of the invention

The invention solves the problem of creating a combine harvester with increased reliability and durability.

The technical result of the present invention is to increase the dynamic stability of the combine, reduce vibration loads and self-oscillations.

The said technical result is achieved in that the mining combine comprises a frame on which a tracked undercarriage is mounted, including left and right tracked movers, a conveyor, a lower breaker-loading device, a rotary actuator with a drive, the said actuator drive includes a supporting structure having front and rear brackets, the said frame of the combine comprises front and rear supports, hydraulic cylinders are mounted in the said supports and corresponding brackets, wherein the said front supports are located on the outer side of the said tracked movers, and the said rear supports are located on the inner side of the said tracked movers.

The actuator drive housing may include vertical support posts located in guides made in the combine frame.

This technical solution allows to improve the dynamic quality of the combine and increase the dynamic stability of the combine operation in any mode.

Description of drawings

The essence of the invention is explained by graphic materials, which depict:

Fig. 1 - Rear perspective view.

Fig. 2 - Side view.

Fig. 3 - Section of the combine in a horizontal plane.

Fig. 4 - Mechanism for lifting the executive body of a mining combine.

Implementation of the invention

The load-bearing elements of the mining combine form an elastic spatial structure, which is under the influence of a complex of force factors changing in time and direction. The force factors affecting the combine structure are determined both by the factors of rock destruction by the cutting tool and by dynamic processes in the combine's own mechanisms. As a result of the constantly changing force loading of the combine, vibration processes of a complex nature arise in its structure, causing self-oscillations.

Vibration and oscillation processes in the supporting structure of any machine cause its premature wear and increase the likelihood of breakdowns.

The present invention ensures a reduction in the level of dynamic processes (vibration, self-oscillations, etc.) in the design of a combine and increases the stability of its operation by creating a mechanical connection of the cutting bodies of the combine with the frame of the combine at points located on different sides of the track drives and maximally spaced in the front part.

The mining combine contains a tracked chassis 1, consisting of left 2 and right 3 tracked drives mounted on a central frame 4, a conveyor 5, a lower cutting and loading device 6, a rotary actuator 7 with a drive 8 mounted on hydraulic cylinders 9.

The housing 15 of the drive 8 of the executive body contains one bracket 12 on the left and right sides, each of which is equipped with a hinge.

In the rear part of the housing 15 of the drive 8 of the executive element 7, a power section 13 is rigidly fixed, containing one bracket 14 on the left and right sides, each of which is equipped with a hinge.

Frame 4 contains supports 16 located on the outer side of tracked movers 2 and 3.

Brackets 12 are pivotally connected to front hydraulic cylinders 9, the other ends of which are secured to supports 16.

The power section 13 also contains brackets 14 on the left and right sides, pivotally connected to the rear hydraulic cylinders 9, the other ends of which are secured to the frame 4 on the inside of the tracked movers 2 and 3.

The combine harvester contains vertical support posts 10 installed in guides 11 made in frame 4.

The invention works as follows:

The combine, by means of the chassis 1, moves along the existing workings, to the face. The lower breaker-loading device 6 is lowered to the ground level and the combine begins to move to the face.

The operation of the rotary actuator 7 is carried out by transmitting rotation from the drive 8.

If it is necessary to change the height of the mine working being carried out by the combine, for example in conditions of high folding of the seam of the mineral being mined, the piston rods of the hydraulic cylinders 9 installed in the hinges of the brackets 12 and 14 are extended or retracted, and the actuator 7 and the power section 13 connected to it are raised or lowered accordingly parallel to the floor of the working.

Together with the actuator 7, the vertical support posts 10, which embrace the fixed guides 11, are raised or lowered.

It should be noted that the front hydraulic cylinders 9, vertically mounted on the left and right sides in brackets 12, rest on the frame 4 of the tracked undercarriage on the outer side of the tracked movers, and the rear hydraulic cylinders 9, mounted on the left and right sides in brackets 14 of the power section 13, rest on the frame 4 of the tracked undercarriage on the inner side of the tracked movers 2 and 3.

This arrangement of the hydraulic cylinder supports 9 allows to reduce the dynamic loads on the elastic system of the mining combine that arise during operation, especially when lifting the actuator 7.

Longitudinal axial and lateral loads arising as a result of the destruction of rock by the executive element 7 are perceived by vertical support posts 10 and transmitted to guides 11 and then to frame 4. In this way, unloading of the housing 15 of the drive 8 from loads caused by the operation of the executive element 7 is ensured.

In some cases, it is advisable for the front pillars 10 to take only lateral loads, and the rear pillars, for example, only longitudinal axial loads.

It should be noted that the given configuration of the mining combine and its elements are a special case and can be implemented differently. The possibilities themselves, which such a configuration provides and which, nevertheless, can be achieved by a number of other design solutions, are essential. For example, the drive 8 can be implemented according to the scheme of a two-flow cylindrical gearbox articulated with the power section 13 by means of a bolted connection. The drive can be carried out from two electric motors installed directly on the drive housing through spacers connected to the input shafts of the drive through a clutch. The drive housing can be implemented as a welded box-section structure, etc.

Also, for the claimed mining combine in the form as it is characterized in the invention formula, there is a possibility of its manufacture and use using means and methods known before the filing date of the application.

The claimed invention can find wide application in the mining industry for conducting mine workings, in particular continuous-action mining combines used in underground mining.

Claims (2)

1. A mining combine harvester comprising a frame on which a tracked undercarriage is mounted, including left and right tracked movers, a conveyor, a lower cutting and loading device designed with the possibility of lowering to ground level, a rotary actuator with a drive, said actuator drive includes a supporting structure having front and rear brackets designed with the possibility of a hinged connection with hydraulic cylinders, said combine harvester frame comprises front and rear supports, hydraulic cylinders are installed in said supports and corresponding brackets, wherein said front supports are located on the outer side of said tracked movers, and said rear supports are located on the inner side of said tracked movers. 2. A combine harvester according to item 1, characterized in that the supporting structure of the actuator drive includes a drive housing and a rear power section.