RU2749894C2 - Revolving gearbox of shearer-loader - Google Patents

Abstract

FIELD: mechanical engineering.

SUBSTANCE: invention relates to mechanical engineering and can be used in gearboxes when one of the stages constitutes planetary gear, for example, in revolving gearboxes of shearer-loaders for rock mass recovery to provide protection against rotation. The revolving gearbox of a shearer-loader includes a cylindrical gearbox the body whereof is equipped with a flange adjoined by the support plane thereof with the support plane of the body with an internal gear rim of the planetary gearbox, and at least one rotation protection element installed within the cavity of a recess in the body with an internal gear rim of the planetary gearbox and within the cavity of the adjoining recess. A step is made therein on the body of the cylindrical gearbox, protruding above the support plane of the flange, configured to cover the part of the outer lateral surface of the body with the internal gear rim by the vertical surface of the step. The cavity of the recess is made in the outer lateral surface of the body with the internal gear rim with access to the support plane thereof, and the cavity of the adjoining recess is made in a step on the side of the vertical surface thereof from the support plane of the flange configured to form a joint cavity with the cavity of the recess of the body with the internal gear rim.

EFFECT: improved maintainability of the revolving gearbox of a shearer-loader, reduced time losses and increased rock mass yield.

4 cl, 4 dwg

Description

Technology area

The invention relates to mechanical engineering, and can be used in gearboxes when one of the stages is a planetary gear, for example, in rotary gearboxes of shearers for the extraction of rock mass to provide protection against rotation.

State of the art

It is known from the prior art a planetary gear with anti-rotation protection, comprising a sun wheel and at least one planetary gear circulating in a housing with an internal toothed rim, which is connected at the driven side and / or at the drive side with at least one supporting flange, and to prevent rotation of the connection with the transmission housing, at least one engaging means are provided, engaging with the internal gear rim of the housing, while the supporting flange contains a recess for receiving the body of the engaging means [1].

The disadvantage of this anti-rotation planetary gear is the complexity of the anti-rotation element and low maintainability.

From the prior art, it is known, taken as the closest analogue, a rotary gearbox (cutting gearbox) of the Eickhoff SL 300 shearer harvester, consisting of a cylindrical gearbox and a planetary gearbox. The housing of the spur gearbox is equipped with a flange, which is mated by its support plane with the support plane of the housing with an internal gear rim of the planetary gearbox. The latter contains a sun wheel and at least one planetary gear, which circulates in a housing with an internal toothed rim. As an element preventing rotation of the housing with an internal gear rim of the planetary gearbox relative to the supporting flange of the spur gear housing, pins are provided, the recesses for which are made on the side of the supporting surface of the housing with an internal gear rim, and the mating recesses are made on the side of the supporting surface of the flange 12].

The disadvantage of this design is the following. The forces arising on the inner gear rim during the operation of the shearer executive body try to rotate the housing with the inner gear rim relative to the supporting flange, which often deforms the protection elements. from cranking. At the same time, the need to maintain a certain outer diameter of the planetary gear housing in order to install the shearer executive body on it does not allow the use of anti-rotation elements of a larger diameter, therefore, pins are used as anti-rotation protection elements, the diameter of which allows them to be located in the body and flange. and to ensure the strength of the connection, several pins are installed. As a result of great efforts during operation, these pins are deformed and the assembly becomes non-separable, which requires the use of destructive disassembly methods. It costs time and money to dismantle the planetary gear. The process of installing a pair is also costly, since there is a housing bore diameter in the support flange, but you still need to dock them. on the pins. Manufacturing mating center bore holes in the bearing flange and the male face of the ring gear housing, plus coaxial pin holes in the ring gear housing and the bearing flange also requires labor and time. Provided the size of the outer diameter of the planetary gear is retained, or even reduced, an increase in the number of pins with a smaller diameter significantly increases the cost of manufacturing and using the planetary gear.

A task

Simplify the connection of the helical and planetary gearbox in the anti-rotation unit, both in manufacture and in service, without increasing the outer diameter of the planetary gearbox housing and ensuring sufficient strength of the anti-rotation protection elements.

The solution to this problem will allow obtaining a technical result, which consists in improving the maintainability of the shearer's slewing gearbox.

Achievement of the claimed technical result provides the consumer properties of the technical solution, reducing time losses and increasing the production of rock mass.

Disclosure of a technical solution

In the known rotary gearbox of the shearer loader, which includes a spur gearbox (1), the housing (2) of which is equipped with a flange (4), which is mated by its support plane (18) with the support plane (19) of the housing with an internal gear rim (3) of the planetary gearbox ( 6), and at least one anti-rotation element (7) installed in a recess (8) in the housing with an internal gear rim (3) of the planetary gearbox (6) and in a counter recess (9), in accordance with the technical the solution is proposed on the housing (2) of the spur gearbox (1) to make a step (11) protruding above the support plane (18) of the flange (4), with the possibility of covering the step (11) of the outer side surface (10) of the body with a vertical surface (12) with an internal gear rim (3), in this case, the cavity of the recess (8) is made in the outer side surface (10) of the body with an internal gear rim (3) with access to its support plane (19), and the cavity of the counter cavity (9) is perform in step (11) from the reference p flange (18) flange (4) from the side of its vertical surface (12) with the possibility of forming a common with the cavity of the recess (8) space.

In addition, it is proposed:

- the anti-rotation element (7) is made in the form of a rectangular key, and the cavity of the recess (8) and the cavity of the mating recess (9) are made in the form of U-shaped grooves;

- on the side surface (10) of the housing with an internal gear rim (3) of the planetary gear (6), make a protrusion (13), with the possibility of mating the lower surface (14) of the protrusion (13) with the upper surface (15) of the step (11) and the upper the surface (16) of the anti-rotation element (7);

- the protrusion (13) on the side surface (10) of the housing with an internal gear rim (3) of the planetary gearbox (6) and the stage (11) on the housing (2) of the cylindrical gearbox (1) are made in the form of reciprocal sectors with the possibility of installing fasteners in them elements.

The causal relationship between the newly introduced essential features and the claimed technical result is explained as follows. Replacing several anti-rotation elements in the form of pins, which are used in the closest analogue, with at least one anti-rotation element, in itself greatly simplifies the manufacture and maintenance of the slewing gear, i.e. its maintainability. To achieve repair manufacturability in the processes of assembly / disassembly of the planetary gearbox (6) and the cylindrical gearbox (1), the cavity of the recess (8) is made in the outer side surface (10) of the housing with the internal gear rim (3) of the planetary gearbox (6) with access to the support plane (19). To create a joint Cavity, into which an anti-rotation element (7) could be installed, a step (11) is made in the spur gearbox (1), protruding above the support plane (18) of the flange (4) with the possibility of covering a vertical surface (12) the steps (11) of a part of the outer side surface (10) of the housing with an internal gear rim (3), in which the cavity of the recess (8) is made, and already from the side of the vertical surface (12) of the entry (11), the cavity of the reciprocal recess (9) is made, extending it to the support plane (18) of the flange (4). This arrangement of the anti-rotation element (7) simplifies the assembly / disassembly of the helical gearbox (1) with the planetary gearbox (6). In addition, such a technical solution allows you to choose the width of the anti-rotation protection element (7) depending on the length of the step itself (11) or place several anti-rotation protection elements (7) in it, namely, how much the height (H) of the helical gearbox ( one). The inventive design and location in the mating parts of the gearboxes of the anti-rotation element (7) improves the operational and maintenance manufacturability of the shearer's rotary gearbox.

Thus, the newly introduced essential features of the claims provide the claimed technical result: improved maintainability of the shearer's rotary gearbox; consumer properties of the technical solution: reduced time loss; increased production of rock mass.

Brief Description of Drawings

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

fig. 1 - sectional view of the connection unit of the spur and planetary gearboxes;

fig. 2 is a top view of FIG. one;

fig. 3 - body with an internal gear rim of the planetary gear;

fig. 4 - housing of a spur gearbox with a flange;

1 - spur gearbox; 2-case;

3 - body with an internal gear rim;

4 - flange;

6 - planetary gearbox;

7 - anti-rotation element;

8 - notch;

9 - reciprocal notch;

10 - outer side surface;

11 - stage;

12 - vertical surface;

13 - ledge;

14 - bottom surface;

15 - upper surface;

16 - upper surface;

17 - fasteners;

18 - reference plane;

19 - reference plane.

Industrial applicability

The implementation of the technical solution is shown by an example (Fig. 1-4), which is not exclusive, but clearly demonstrates the possibility of achieving the claimed technical result.

The rotary gearbox of the shearer harvester contains a spur gearbox (1), the housing (2) of which is equipped with a flange (4) with a support plane (18) (Fig. 4). A housing with an internal gear rim (3) of a planetary gearbox (6) is connected to the housing (2) of the helical gearbox (1), connecting its support plane (19) with the support plane (18) of the flange (4) of the housing (2) of the cylindrical gearbox (1) ) (Fig. 1). To prevent rotation of one relative to the other, an anti-rotation element (7) (Fig. 1) is provided, which is installed in the cavity of the recess (8), which is made in the outer side surface (10) of the housing with an internal gear rim (3) with an outlet to it the support plane (19) (Fig. 3), and into the cavity of the mating recess (9). To create the cavity of the counter recess (9), an additional structural element is introduced into the structure of the housing (2) of the cylindrical gearbox (1) within its height (H) - a step (11), which protrudes above the supporting plane (18) of the flange (4) of the housing ( 2) spur gear (1). The step (I) is made curved so that with its vertical surface (12) it encompasses a part of the outer side surface (10) of the housing with an internal gear rim (3). From the side of the vertical surface (12) of the step (11) to the support plane (18) of the flange (4), the cavity of the mating recess (9) is made (Figs. 2, 4).

In the given example, the slewing gear has one anti-rotation element (7) in the form of a rectangular key (Fig. 1, 2), although, as an option, there can be two or more anti-rotation elements (7). The design of the anti-rotation element (7) in the form of a rectangular key is not the only possible one; it can have, for example, a spherical, cylindrical, etc. shape.

The number and dimensions of the anti-rotation elements (7) are limited by the height (H) of the housing (2) of the helical gearbox (1), which, in fact, limits the size of the step (11) along the length (Fig. 2).

In the example, on the lateral surface (10) of the housing with an internal gear rim (3) of the planetary gearbox (6), a protrusion (13) is made in the form of a sector (Fig. 3), which can contact its lower surface (14) with the upper surface (15) steps (11) and with the upper surface (16) of the anti-rotation element (7). Such a protrusion (13) makes it possible to increase the body of the body with an internal gear rim (3) and to place additional fasteners (17) on it. In addition, if necessary, the protrusion (13) acts as a safety device against falling out of the anti-rotation element (7), although the latter can be fastened in any other way, for example, by fit, fasteners, by means of bevels, etc.

The slewing gear assembly of the shearer is carried out as follows. An anti-rotation element (7) is installed in the cavity of the counter recess (9) of the step (11), then a planetary gearbox (6) is installed on top, aligning the cavity of the recess (8) on the outer side surface of the housing with an internal gear rim (3) protruding from the cavity of the mating recess (9) with a part of the anti-rotation element (7). Install the fasteners (17) along the support flange (4).

The claimed slewing gear of the shearer loader can be manufactured by known means using modern technologies, therefore the technical solution is industrially applicable and provides the claimed technical result.

For a person skilled in the art, from the previous description, numerous modifications of the shearer's slewing gear follow, which fall within the scope of the appended claims.

Information sources

1. Patent RU No. 2529255 "Planetary gear with anti-rotation protection" Published: 09/27/2014 Byull. No. 27.

2. Operating Instructions Eickhoff SL 300 Shearer, January 2005, pp. 6-24.

Claims (4)

1. Rotary gearbox of the shearer harvester, including a spur gearbox (1), the housing (2) of which is equipped with a flange (4), which is mated by its support plane (18) with the support plane (19) of the housing with an internal gear rim (3) of the planetary gearbox ( 6), and at least one anti-rotation element (7) installed in the cavity of the recess (8) in the housing with the internal toothed rim (3) of the planetary gearbox (6) and in the cavity of the mating recess (9), characterized in that on the housing (2) of the spur gearbox (1), a step (11) is made, protruding above the support plane (18) of the flange (4), with the possibility of a vertical surface (12) covering the step (11) of a part of the outer side surface (10) of the housing with an internal gear rim (3), while the cavity of the recess (8) is made in the outer lateral surface (10) of the housing with an internal gear rim (3) with access to its support plane (19), and the cavity of the counter cavity (9) is made in a step (11) from the side of its vertical surface and (12) from the support plane (18) of the flange (4) with the possibility of forming a cavity common with the cavity (8) of the housing with an internal gear rim of the cavity. 2. The rotary gear of the shearer according to claim 1, which differs in that the anti-rotation element (7) is made in the form of a rectangular key, and the cavity of the recess (8) and the cavity of the reciprocal recess (9) are made in the form of U-shaped grooves. 3. Rotary gear of the shearer according to claim 1, which differs in that on the side surface (10) of the housing with the internal gear rim (3) of the planetary gear (6) there is a protrusion (13), with the possibility of mating the lower surface (14) of the protrusion (13) with the upper surface (15) of the step (11) and the upper surface (16) of the anti-twist element (7). 4. Rotary gear of the shearer harvester according to claim 3, which differs in that the protrusion (13) on the side surface (10) of the housing with the internal gear rim (3) of the planetary gearbox (6) and the stage (11) on the housing (2) of the cylindrical the gearbox (1) is made in the form of reciprocal sectors with the possibility of installing fasteners (17) in them.

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