WO2016089338A1

WO2016089338A1 - Drive for the working member of a cutter-loader

Info

Publication number: WO2016089338A1
Application number: PCT/UA2015/000105
Authority: WO
Inventors: Владислав Александрович СТЕПАНОВ; Дмитрий Иванович ПАНКОВ; Николай Николаевич ХОРУНЖИЙ
Original assignee: Общество С Ограниченной Ответственностью "Корум Групп"
Priority date: 2014-12-04
Filing date: 2015-11-06
Publication date: 2016-06-09
Also published as: RU167380U1

Abstract

The invention relates to mining, and more particularly to drives for the working members of cutter-loaders for mining minerals. The invention concerns means for protecting elements of the transmission of the working member of a cutter-loader. A cutting element is mounted in a safety unit additionally included in a drive and consisting of two splined half couplings which are axially interconnected such as to be capable of mutual rotation and of contacting with elements of the kinematic chain of a reduction gear and with the cutting element. Via axial openings, the splined half couplings abut a cutter safety element such as to enable the transmission of torque, and the ends of the half couplings are provided with caps having elements for removal of the safety unit. The technical result consists in separating, in the kinematic chain of a drive for the working member of a cutter-loader, the functions of damping torsional oscillation amplitude and of protecting a transmission against excessive loads.

Description

DRIVE OF THE EXECUTIVE BODY OF THE MINING COMBINE

DESCRIPTION

Technical field

The utility model relates to mining, namely, to the drives of the executive bodies of mining combines for mining.

State of the art

The prior art drive actuator of a mining machine containing an electric motor, the rotor shaft of which is connected to the input shaft of the gearbox by means of a spline torsion shaft. The torque is transmitted further according to the kinematic scheme through a planetary gear to the output shaft and the actuator. The torsion shaft, designed to reduce the amplitude of torsional vibrations, is equipped with a discharge groove, due to which it also plays the role of a safety device that protects the transmission from overloads that exceed the maximum permissible ones. In case of their occurrence, the torsion shaft is destroyed in the place of the discharge groove, protecting the elements of the electric motor and the executive body from breakdowns The disadvantage of this drive is that two functions, namely: damping torsional vibrations of the transmission and protecting the gearbox elements from loads exceeding the maximum allowable, are performed by the same drive part - the torsion shaft. This combination of functions leads to the following:

- the discharge groove reduces the damping properties of the torsion shaft;

- when overloaded, the torsion shaft collapses along the discharge groove, which requires replacement. At the same time, replacing a torsion shaft in a mine environment is a very complex, time-consuming high-risk operation.

The drive of the executive body (cutting gear) of a mining machine, adopted for the prototype, contains an electric motor that transmits torque to the pinion shaft by means of a spline torsion shaft having a gearbox that protects against overload, and a voltage concentrator in the form of an unloading (radius) groove. The torsion shaft is made of two parts connected by a movable cam-disk clutch, on the outer surface of which slots are made [2].

The disadvantage of this drive design is that it only insignificantly solves the problem of reducing the complexity of the process of replacing a torsion shaft having a gearbox that protects against overload, a voltage concentrator in the form of an unloading (radius) groove. This happens by dividing the torsion shaft into two parts and connecting these parts with a sleeve. But, since the torsion shaft must fulfill the function of damping the amplitude of the torsional vibrations of the transmission, its location in the drive remains the same

- between the electric motor and gearbox, and in case of destruction torsion shaft through the groove, its replacement is time-consuming and inconvenient: it is necessary to remove the motor cover, retaining ring, half rings, remove part of the damaged shaft, disconnect the motor housing from the gearbox and remove the motor, and then remove the second shaft fragment.

A task

The utility model is based on the task of changing the design of the drive of the executive body of a mining machine so that the torsion shaft performs only the function of damping (damping) the amplitude of the torsional vibrations of the transmission, and remove the safety function from it.

The solution to this problem will allow to obtain a technical result, which consists in dividing in the kinematic diagram of the drive of the executive body of the mining combine the functions of damping (damping) the amplitude of torsional vibrations and protecting the transmission from maximum permissible loads.

Achieving the claimed technical result provides consumer properties of the claimed technical solution:

- improving the function of damping (damping) the amplitude of torsional vibrations by the torsion shaft;

- reducing the complexity of replacing the safety element, the convenience of carrying out work on its replacement, improving the state of safety when performing these works. Utility Model Disclosure

The problem is solved due to the fact that in the known drive of the executive body of a mining machine, including an electric motor coupled to a gearbox and a shear element, in accordance with a utility model, it is proposed to install a shear element in a safety unit that is additionally inserted into the reducer and can be removed without extra disassembly of the drive, consisting of two spline coupling halves, interconnected coaxially, with the possibility of mutual rotation and contact with kinematic elements a reduction gear scheme, and a shear element, in this case, the spline coupling halves must be interfaced with axial holes with a shear element with the possibility of transmitting torque, and provided with end caps with elements for removing the safety block (4).

The above essential features of a utility model are necessary and sufficient to achieve a technical result in all cases to which the scope of legal protection of a utility model extends.

In addition, it is proposed:

- shear element to perform in the form of a multifaceted rod;

- slotted coupling halves movably interconnected by a sleeve fixed by means of locking elements;

- additionally insert the safety block into the gearbox at the output of the planetary gear;

The causal relationship between the new essential features of the device and the obtained technical result is explained as follows. Install shear element in optional The block introduced into the design, consisting of two spline coupling halves, which are coaxially interconnected with the possibility of mutual rotation and contact with the kinematic elements of the gearbox and the shear element, provides separation of the damping (damping) of the torsional vibration amplitude and protection of the transmission from maximum permissible loads. The second function in the inventive drive of the executive body is performed by a shear element, which is installed in an additional safety unit introduced into the gearbox.

The installation of a shear element in the safety unit makes it easy to remove it from the drive, including in the event of its destruction, together with the unit using universal means, for example, pullers. To do this, the half-coupling covers installed from the ends are equipped with elements for removing the safety block from the drive, for example, threaded holes, hooks, hooks, etc. Next, the safety block is disassembled, parts of the destroyed shear element are removed and replaced with a new one, while all other details blocks are reused. This ensures the consumer properties of the proposed solution, namely, the convenience of carrying out work on replacing the shear safety element and improving the state of safety.

The essence of the technical solution is presented in the drawings, where:

- in FIG. 1 shows a sectional view of a drive of an executive body of a mining combine;

- in FIG. 2 - shows a longitudinal section of a safety block with a shear element;

- in FIG. 3 - shows a cross section A - A of FIG. 2; Brief Description of the Drawings

1 - gear;

2 - electric motor;

3 - shear element;

4 - safety block;

4.1 - slotted coupling half;

4.2 - slotted coupling half;

5.1 - cover;

5.2 - cover;

6.1 - axial hole;

6.2 - axial hole:

7 - planetary gear;

8.1 - item to retrieve;

8.2 - element for extraction;

9 — sleeve;

10 - locking element;

1 1 - torsion shaft;

12 - cutting body;

13 - gear cover;

14 - a lock ring;

15 - stress concentrator.

The drive of the Executive body of the mining machine contains a gearbox (1) and an electric motor (2), the shaft of which transmits torque to the torsion shaft (1 1), and then, according to the kinematic scheme through a planetary gear (7), to the cutting body (12) of the mining machine. In this case, the torsion shaft (1 1) is made without an unloading groove, and into the drive a safety block (4) was introduced with a shear element, which is installed in the gearbox (1) at the output of the planetary gear (7) from the heap side of the mining combine. This provides convenient access to the safety unit. If it is necessary to replace the shear element (3), it is enough to remove the cover (13) of the gearbox (1) and remove the safety block (4) using universal locksmith tools. For this, the covers (5.1 and 5.2), which are installed on both sides of the safety block (4), are equipped with extraction elements (8.1 and 8.2). In the example, these are threaded holes for the eyebolt, puller, and other devices by which the safety block (4) is removed from the gearbox (1) (Fig. 1).

The safety block (4) is made of two spline coupling halves (4.1 and 4.2), which are coaxially connected by a sleeve (9) with the possibility of rotation relative to each other, and the locking of the splined coupling half (4.1 and 4.2) in the axial direction is made at the ends of the sleeve (9 ) locking elements (10) (Fig. 2). The covering surface of the axial hole (6.1 and 6.2) of each splined coupling half (4.1 and 4.2) in shape corresponds to the covered surface of the shear element (3), which is installed in the axial holes (6.1 and 6.2). In the example, the shear element (3) has the shape of an octagonal rod, which allows the transmission of torque (Fig. 3).

To perform the shear element (3) directly the safety function, namely: destruction in the event of loads exceeding the maximum permissible, the shear element (3) is installed in the axial holes (6.1 and 6.2) for a specific fit, and the spline half couplings (4.1 and 4.2) on the exit line from the axial holes (6.1 and 6.2) of the shear safety element (3) have a stress concentrator (15) in the form of a sharp edge. Industrial applicability

The achievement of the technical result is as follows.

During the operation of the combine, in the event of a load on the cutting body (12) exceeding the maximum permissible value for which the shear element (3) is designed, the octagonal rod is destroyed, and the kinematic chain of the drive of the executive body of the mountain combine is disconnected. The ability to rotate the spline coupling halves (4.1 and 4.2) relative to the sleeve connecting them (9) ensures their integrity after the destruction of the shear element (3) and reuse. At the same time, expensive drive elements, in particular planetary gear elements (7), are protected from damage.

To replace the shear element (3), the retaining rings (14) and covers (5.1 and / or 5.2) are removed, the spline coupling halves (4.1 and 4.2) are disconnected from the sleeve (9), removing the retaining element (10), and parts of the destroyed octagonal rod are removed . All work is carried out on the obsolete side of the combine, due to which their safety is ensured. The assembly and installation of the safety block (4) is performed in the reverse order.

The implementation of the torsion shaft (1 1) without an unloading groove, provides an increase in its strength and the efficiency of smoothing the amplitude of torsional vibrations in the drive.

The proposed drive changes will remove the safety function from the torsion shaft and increase the efficiency of protecting the gearbox transmission from loads exceeding maximum permissible ones by introducing a safety block into the drive (4). At the same time, labor intensity and convenience are reduced. carrying out work to replace the shear element, as well as improving the state of safety.

The above information confirms the possibility of industrial implementation and industrial use of the proposed drive of the executive body of a mining machine, which indicates that the technical solution meets the patentability condition “industrial applicability”.

The source of information:

1. The company "JOY MINING MACHINERY)). Shearer for long lavas 4LS20. Technical publication, 2007. (TMLW0742-0107).

2. Patent RU21420, priority August 17, 2001, publ. 01/20/2002

Claims

FORMULA

1. The drive of the Executive body of the mining machine, comprising an electric motor (2), coupled with a gearbox (1), and a shear element 5 (3), characterized in that the shear element (3) is installed in the safety unit (further inserted into the gearbox (1) ( 4), which consists of two spline coupling halves (4.1 and 4.2), connected coaxially, with the possibility of mutual rotation and contact with the elements of the kinematic circuit of the gearbox and shear safety element (3), while the spline coupling halves (4.1 and 4.2) axial holes (6.1 and 6.2) are conjugated with a shear safety element (3) with the possibility of transmitting torque, and from the ends are equipped with elements for removing (8.1 and 8.2) the safety block (4).

15 2. The drive according to claim 1, characterized in that the shear element (3) is made in the form of a multifaceted rod.

3. The drive according to paragraphs. 1 or 2, characterized in that the spline coupling halves (4.1 and 4.2) are movably interconnected by a sleeve (9), fixed by means of locking elements (10).

0 4. The drive according to paragraphs. 1, 2 or 3, characterized in that the safety unit (4) additionally introduced into the gearbox (1) is installed at the output of the planetary gear (7).

5. The drive according to paragraphs. 1, 2, 3 or 4, characterized in that the elements for removing (8.1 and 8.2) the safety block (4), which are equipped with 5 spline coupling halves (4.1 and 4.2), are made on the covers (5.1 and 5.2).