RU2790225C1 - Mining machine portable rotation gearbox - Google Patents

Abstract

FIELD: mining machines design.

SUBSTANCE: invention relates to the design of mining machines. The portable rotation gearbox of a mining machine contains a housing, shafts, gears, bearing supports placed inside the housing. The portable rotation gearbox of the mining machine also contains an output gear, which is mounted and rotates on the axle. The portable rotation gearbox of the mining machine is made with the possibility of transferring rotation from the drive through the shafts and gears to the output gear. On said axis, without the possibility of rotation, a sleeve is installed, which is fixed in the hole of the said body by means of a cover fixedly fixed on the said body. The axis is made with the possibility of translational movement when opening the kinematic connection between the output gear wheel and the gear wheels of the gearbox by moving the screw. Said axle is made with the possibility of axial movement inside the sleeve. On the axis, with the help of a locking element in the form of a key, a bushing installed in the bore of the housing is fixed, having longitudinal internal grooves on its front end. The cover fixed on the body has protrusions on its inner surface that enter the grooves of the bushing and securely fix it from turning in the bore of the body.

EFFECT: creating a reliable locking connection between the axle and the housing, which excludes its rotation relative to the gear housing during the translational movement of the axle at the moment of opening the kinematic connection in the gearing.

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Description

The field of technology to which the invention belongs

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

State of the art

A locking device for fixing parts of the shaft-sleeve type is known (RF patent 2285106), containing a rod with heads placed in an annular groove formed by combined semi-annular recesses on the outer surface of the shaft and the inner surface of the sleeve, while the annular groove on the connected elements is made at an angle to longitudinal axis of the device, and the working part of the rod placed in it is hollow and with a longitudinal section. The disadvantage of analogue is the possibility of rotation of the shaft in the sleeve and, accordingly, the appearance of burrs on its inner surface. The closest technical solution for the claimed invention is a device used in a mining machine with a rotary engine and an extendable milling head (patent US 3844618 A). internal surface, as well as a screw interacting with a cylindrical glass, attached to the retractable end part of the milling drum. This technical solution is taken as a prototype. The disadvantage of the prototype is the complexity of the design, requiring the use of a hydraulic motor.

Disclosure of invention

The technical result of the present invention is the creation of a reliable locking connection of the shaft with the housing, excluding its rotation relative to the gearbox housing during the translational movement of the shaft at the moment of opening the kinematic connection in the gearing. This is achieved by the fact that the portable rotation gearbox of the mining machine contains a housing, shafts placed inside the housing, gear wheels, bearing supports and an output gear wheel mounted on the shaft. A bushing is installed on said shaft without the possibility of rotation, fixed in the hole of said housing by means of a cover fixedly fixed on said housing, while said shaft is made with the possibility of axial movement inside the bushing.

Comparison of the claimed portable rotation gearbox of a mining machine with a technical solution from the prototype allows us to conclude that the latter does not have features similar to the essential distinguishing features of the claimed invention. Accordingly, the invention is new and has the design features necessary for the implementation of the technical result, namely: the creation of a reliable locking connection of the shaft with the housing, excluding its rotation relative to the gearbox housing during the translational movement of the shaft at the moment of opening the kinematic connection in the gearing.

Description of drawings

The essence of the invention is illustrated by graphic materials, which shows:

Fig. 1 - Mining machine. General form;

Fig. 2 - Executive bodies. General form;

Fig. 3 - Portable rotation gearbox. Incision.

Implementation of the invention

Mining machine contains right and left executive bodies, as shown in Fig. 2. Each of the executive bodies contains a drive (1), an input gearbox (2), a gearbox of the executive body (3), a distributing gearbox (4) and at least one cutting head (5). The rotation of the cutting head (for example, a cutting disc) is transmitted from the drive (1) through the input gearbox (2), the gearbox of the executive body (3) and the distributing gearbox (4). Gear housings (3) of each of the two executive bodies are docked with their side surfaces to a portable rotation gearbox (b) used to transfer portable rotation to distributing gearboxes (4) with cutting heads (5) fixed to them.

The portable rotation gearbox of the mining machine contains a housing (7), shafts (8), gear wheels (9), bearing supports (10), output shaft (11), output gear wheel (12), bushing (13), cover (14), locking element (15), screw (16) and drive (17).

The device works as follows. During the operation of the portable rotation gearbox, the rotation from the drive is transmitted through the shafts and gears to the output gear, which rotates on a fixed shaft (i.e. axis) mounted in the body bores. When the kinematic connection between the gears and the output gear is opened, the translational movement of the shaft occurs, bending loads increase in the gearing, and it becomes necessary to securely lock the shaft from its rotation relative to the housing to prevent premature wear of the housing, the appearance of chips inside the gearbox, scoring, etc. On the shaft, with the help of a key, a bushing installed in the bore of the housing is fixed, having longitudinal internal grooves on its front end. The cover fixed on the body by means of a bolted connection has protrusions on its inner surface that enter the grooves of the bushing and securely fix it from turning in the body bore.

It should be noted that the characteristics and design features of the elements that make up the portable rotation gearbox of the mining machine may differ from those given in the description. It is essential that due to their use of the design of the claimed invention, a reliable locking connection of the shaft with the housing is achieved, excluding its rotation relative to the gearbox housing during the translational movement of the shaft at the moment of opening the kinematic connection in the gearing.

Also, for the claimed utility model in the form as it is described in the claims of the utility model, there is the possibility of its manufacture and application using means and methods known before the filing date of the application.

Claims (7)

A portable rotation gearbox of a mining machine, containing a housing (7), shafts (8) placed inside the housing, gears (9), bearing supports (10), while the portable rotation gearbox of the mining machine also contains an output gear wheel (12), which is installed and rotates on the axis (11), the portable rotation gearbox of the mining machine is configured to transmit rotation from the drive (17) through the shafts (8) and gear wheels (9) to the output gear wheel (12), a sleeve (13) is mounted on said axle (11) without the possibility of rotation, fixed in the hole of said body (7) by means of a cover (14) fixedly fixed on said body (7), axis (11) is made with the possibility of translational movement when opening the kinematic connection between the output gear (12) and gear wheels (9) by moving the screw (16), while the said axis (11) is made with the possibility of axial movement inside the sleeve (13) , characterized in that on the axis (11) with the help of a locking element in the form of a key (15), a bushing (13) installed in the bore of the housing (7) is fixed, which has longitudinal internal grooves on its front end, at the same time, the cover (14), fixed on the body (7), has protrusions on its inner surface that enter the grooves of the bushing (13) and securely fix it from turning in the bore of the body.

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