Coal mining machine rocker arm and coal mining machine

Abstract

The present invention discloses a rocker arm of a coal mining machine and a coal mining machine, wherein the rocker arm of the coal mining machine comprises a rocker arm housing, a gear box and a cooling device arranged in the rocker arm housing, wherein the rocker arm housing comprises a first side surface and a second side surface opposite to each other, wherein the first side surface and the second side surface extend along the length direction of the rocker arm housing, and a mounting hole is arranged at a position corresponding to the gear box on the second side surface, and the cooling device can be inserted into the gear box through the mounting hole. The present invention can directly insert the cooling device into the rocker arm housing or directly pull out the cooling device from the rocker arm housing, and the disassembly and assembly of the cooling device is very convenient.

Description

Technical Field

[0001] The invention relates to the technical field of mining equipment, and in particular to a coal mining machine rocker arm and a coal mining machine. Background Art

[0002] At present, the coal mining machine products sold on the market are gradually developing in the direction of high power and intelligence, and stable quality, high production and high efficiency are always the ultimate goals pursued by customers. However, with the increase of the cutting power of the coal mining machine, the heating phenomenon of the gear box in the rocker housing is becoming more and more serious. The cooling effect of the original device is not ideal, which will cause the housing, gears and lubricating oil to be too high, thus causing gear tooth surface bonding, seal ring failure, bearing locking and other faults, which directly affect the service life of the coal mining machine products.

[0003] At present, there are two main ways to cool the rocker arms of coal mining machine products sold on the market: (1) Water channels are reserved on the upper and lower parts of the rocker arm housing. After the cover plates are welded on the water channels to seal them, cooling water is introduced. After cooling, the water is sprayed out through the nozzle. However, external water channel cooling is difficult to manufacture and the cooling effect is not very ideal. (2) A cooling device is inserted into the rocker arm gearbox. The cooling device has a cooling pipe. The cooling device is generally installed in the rocker arm housing along the length of the rocker arm. The gearbox space occupied is relatively large, and the installation and removal of the cooling device is very inconvenient. Summary of the invention

[0004] In view of this, the present invention provides a coal mining machine rocker arm and a coal mining machine, wherein a cooling device can be directly inserted into a rocker arm housing or directly pulled out from the rocker arm housing, and the cooling device can be easily assembled and disassembled.

[0005] Specifically, the following technical solutions are included:

[0006] In the first aspect, an embodiment of the present invention provides a rocker arm of a coal mining machine, comprising a rocker arm housing and a gear box and a cooling device arranged in the rocker arm housing, the rocker arm housing comprising a first side surface and a second side surface opposite to each other, the first side surface and the second side surface extending along the length direction of the rocker arm housing, and a mounting hole is arranged at a position corresponding to the gear box on the second side surface, and the cooling device can be inserted into the gear box through the mounting hole.

[0007] Optionally, the cooling device includes a first end and a second end opposite to each other, the second end is connected to the second side, the first end and the second end are located in a first direction, and the first direction intersects with the length direction of the rocker arm housing.

[0008] Optionally, the cooling device comprises a coolant inlet and a coolant outlet, the coolant inlet and the coolant outlet are both arranged at the first end, and the first side surface is provided with through holes corresponding to the coolant inlet and the coolant outlet.

[0009] Optionally, the cooling device includes a cooling pipe, the cooling pipe includes a first pipe opening and a second pipe opening, the first pipe opening corresponds to the coolant inlet, and the second pipe opening corresponds to the coolant outlet.

[0010] Optionally, the cooling pipe comprises a straight section and a spiral section, the straight section extends from the first pipe opening to the spiral section, and the spiral section extends around the straight section to the second pipe opening.

[0011] Optionally, the cooling device further includes a positioning frame, and the cooling pipe is arranged in the positioning frame.

[0012] Optionally, the positioning frame includes a first connecting plate, a second connecting plate and a side plate, the side plate is connected between the first connecting plate and the second connecting plate, the cooling pipe is located in the space enclosed by the side plate and the first connecting plate and the second connecting plate, the first connecting plate is arranged at the first end, the second connecting plate is arranged at the second end, the first connecting plate is connected to the cooling pipe, and the second connecting plate is connected to the second side surface of the rocker arm housing.

[0013] Optionally, the coal mining machine rocker arm further includes a sealing end cover arranged at the mounting hole, and the second connecting plate is connected to the second side surface via the sealing end cover.

[0014] Optionally, a positioning hole is provided in the middle of the sealing end cover, and a positioning pin cooperating with the positioning hole is provided on the second connecting plate.

[0015] In a second aspect, an embodiment of the present invention provides a coal mining machine, comprising the coal mining machine rocker arm as described above.

[0016] The beneficial effects of the technical solution provided by the embodiment of the present invention include at least:

[0017] The coal mining machine rocker arm provided by the present invention installs the cooling device in the gear box inside the rocker arm housing perpendicular to the length direction of the rocker arm. The cooling device can be directly inserted into the rocker arm housing or directly pulled out from the rocker arm housing without disassembling the rocker arm housing to install and remove the cooling device, making the installation and disassembly of the cooling device more convenient and occupying less space in the gear box. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0019] Figure 1 It is a front view of the rocker arm of a coal mining machine according to an embodiment of the present invention.

[0020] Figure 2 For along Figure 1 Cross-sectional view taken along line BB in FIG.

[0021] Figure 3 It is a schematic structural diagram of a cooling device according to an embodiment of the present invention.

[0022] Figure 4 For along Figure 3 Cross-sectional view taken along line AA.

[0023] The reference numerals in the figures represent respectively:

[0024] 100-rocker arm housing; 110-sealing end cover; 120-first side; 130-second side; 200-cooling device; 210-cooling pipe; 211-first pipe opening; 212-second pipe opening; 221-first connecting plate; 222-second connecting plate; 223-side plate; 230-connecting pipe fitting; 300-gear box; 400-locating pin.

[0025] The above drawings have shown clear embodiments of the present invention, which will be described in more detail below. These drawings and text descriptions are not intended to limit the scope of the present invention in any way, but to illustrate the concept of the present invention for those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] Coal mining machine is one of the important equipment to realize the mechanization and modernization of coal mine production, and the coal mining machine rocker arm is one of the important parts of the coal mining machine. The coal mining machine rocker arm can be divided into a straight rocker arm (also called a straight rocker arm) and a curved rocker arm (also called a bent rocker arm) according to its appearance.

[0028] As the cutting power of the coal mining machine increases, the heating phenomenon of the gear box in the rocker housing becomes more and more serious, so the cooling of the gear box becomes particularly important. In the known technology, the cooling device with a cooling pipe is generally installed along the length direction of the rocker arm, which is difficult to install and requires a large amount of work. The installation of the cooling device along the length direction of the rocker arm housing requires that the rocker arm housing has a split structure in the length direction. Before installation, the rocker arm housing needs to be split in its length direction, and then the cooling device is installed in the rocker arm housing along the length direction of the rocker arm housing. In addition, in order to achieve a good cooling effect, this installation method requires cooling devices to be set on both sides of the gear box, that is, two cooling devices need to be set along the length direction of the rocker arm housing.

[0029] In addition, because the rocker arm housing is composed of two parts and is separated into two parts near the position where the cooling device is inserted (in the length direction of the rocker arm housing), the two parts of the housing are fixed by bolts so that the cooling device can be inserted into it from the middle position of the rocker arm. Once the cooling device of the coal mining machine rocker arm fails underground and needs to be replaced, the rocker arm housing must be disassembled into two parts and the cooling device must be removed and pulled out. Disassembling the coal mining machine rocker arm underground is an extremely difficult task, which is time-consuming, delays production, and is quite costly.

[0030] The embodiment of the present invention provides a coal mining machine rocker arm, which can make the installation and disassembly of a cooling device more convenient.

[0031] To make the technical solutions and advantages of the present invention more clear, the embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.

[0032] like Figure 1 and Figure 2 As shown, an embodiment of the present invention provides a rocker arm for a coal mining machine, comprising a rocker arm housing 100 and a gear box 300 and a cooling device 200 arranged in the rocker arm housing 100 .

[0033] The cooling device 200 includes a first end and a second end opposite to each other. By way of example, the first end and the second end may be ends opposite to each other in a length direction of the cooling device 200 .

[0034] At least a portion of the cooling device 200 is disposed in the gear box 300, the second end of the cooling device 200 is connected to the rocker arm housing 100, and the first end and the second end of the cooling device 200 are located in a first direction (such as Figure 2 ).

[0035] In the embodiment according to the present invention, the cooling device 200 comprises a cooling liquid inlet and a cooling liquid outlet, and the cooling liquid inlet and the cooling liquid outlet are both arranged at the first end.

[0036] Since the second end of the cooling device 200 is connected to the rocker arm housing 100, the coolant inlet and the coolant outlet are both arranged at the first end, which can make it easier for the coolant to enter and discharge.

[0037] In addition, the coolant inlet and the coolant outlet are both arranged at the first end, which makes it easier to insert and remove the cooling device 200 relative to the rocker arm housing 100.

[0038] The coolant enters from the coolant inlet, is discharged from the coolant outlet, and circulates in the cooling device 200. Since at least a part of the cooling device 200 is arranged in the gear box 300, the oil in the gear box 300 flows outside the cooling device 200, and realizes heat exchange with the coolant flowing in the cooling device 200, thereby achieving the purpose of cooling the gear box 300.

[0039] The rocker arm housing 100 includes a first side surface 120 and a second side surface 130 opposite to each other. The first side surface 120 and the second side surface 130 are connected along the length direction (eg, Figure 2 The cooling device 200 extends as shown in R2 in the figure, the first end of the cooling device 200 corresponds to the first side surface 120, the second end of the cooling device 200 corresponds to the second side surface 130, and a mounting hole for installing or removing the cooling device 200 is provided at a position on the second side surface 130 corresponding to the gear box 300, and the first direction intersects with the length direction of the rocker arm housing 100 (in this embodiment, the two are perpendicular to each other), that is, in this embodiment, when the cooling device 200 is installed in the rocker arm housing 100, the length direction of the cooling device 200 is perpendicular to the length direction of the rocker arm housing 100.

[0040] In this embodiment, the second end of the cooling device 200 is connected to the second side surface 130 to position the cooling device 200 in the rocker arm housing 100. The coolant inlet and the coolant outlet located at the first end of the cooling device 200 can be connected to the coolant tank through the respective connecting pipes 230 passing through the through holes provided on the first side surface 120 to realize the circulation of the coolant.

[0041] The coal mining machine rocker arm provided in an embodiment of the present invention installs the cooling device 200 in the gear box 300 inside the rocker arm housing 100 perpendicular to the length direction of the rocker arm. The cooling device 200 can be directly inserted into the rocker arm housing 100 or directly pulled out from the rocker arm housing 100 without disassembling the rocker arm housing 100 to install and remove the cooling device 200, making the installation and disassembly of the cooling device 200 more convenient and occupying less space in the gear box 300.

[0042] In the embodiment of the present invention, since the cooling device 200 can be directly installed in the rocker arm housing 100 perpendicular to the length direction of the rocker arm housing 100, there is no need to disassemble the rocker arm housing 100, and therefore there is no need to disassemble the rocker arm housing 100 in its length direction. The rocker arm housing 100 in the embodiment of the present invention is an integrated structure in its length direction rather than a split structure, thereby saving the manufacturing cost and manufacturing process of the rocker arm housing 100, and also making the installation of the cooling device 200 more convenient.

[0043] like Figure 2 , Figure 3 and Figure 4 As shown, according to an embodiment of the present invention, the cooling device 200 includes a cooling pipe 200, and the cooling pipe 200 includes a first pipe opening 211 and a second pipe opening 212, and the first pipe opening 211 and the second pipe opening 212 are both arranged at a first end.

[0044] Exemplarily, in this embodiment, the first pipe opening 211 is a coolant inlet, and the second pipe opening 212 is a coolant outlet. The first pipe opening 211 and the second pipe opening 212 pass through the first side surface 120 through their respective connecting pipes 230 and are connected to the coolant tank to achieve coolant circulation.

[0045] like Figure 3 As shown, at least a portion of the cooling pipe 200 is spirally shaped. The spirally shaped cooling pipe 200 can increase the cooling range of the cooling device 200 , increase the heat dissipation area, and thus improve the cooling efficiency of the cooling device 200 .

[0046] Exemplarily, in this embodiment, the cooling pipe 200 includes a straight section and a spiral section, the straight section extends from the first pipe opening 211 to the spiral section, and the spiral section spirally extends around the straight section to the second pipe opening 212. Of course, the cooling pipe 200 is not limited to the above-described form.

[0047] like Figure 3 As shown, according to an embodiment of the present invention, the cooling device 200 further includes a positioning frame disposed between the first end and the second end, and the cooling pipe 200 is disposed in the positioning frame.

[0048] The cooling pipe 200 is protected in the positioning frame, and its external dimensions are controllable, which is more conducive to the installation of the cooling device 200.

[0049] By way of example, in an embodiment of the present invention, the positioning frame includes a first connecting plate 221, a second connecting plate 222, and a side plate 223, the side plate 223 is connected between the first connecting plate 221 and the second connecting plate 222, and the cooling pipe 200 is located in a space surrounded by the side plate 223 and the first connecting plate 221 and the second connecting plate 222. By way of example, in this embodiment, there are two side plates 223 so that the outer dimensions of the cooling pipe 200 can be controlled and the cooling pipe 200 can be protected.

[0050] The first connecting plate 221 is disposed at the first end, and the second connecting plate 222 is disposed at the second end. The first connecting plate 221 is connected to the cooling pipe 200 , and the second connecting plate 222 is connected to the second side surface 130 of the rocker arm housing 100 .

[0051] The first pipe opening 211 and the second pipe opening 212 of the cooling pipe 200 pass through the first connecting plate 221 via respective connecting pipes 230 , so as to position the cooling pipe 200 in the positioning frame.

[0052] The second connecting plate 222 is connected to the second side surface 130 of the rocker housing 100, and is used to position the entire cooling device 200 in the rocker housing 100. Exemplarily, a sealing end cover 110 is connected to the mounting hole (which is used to mount the cooling device 200) of the second side surface 130 of the rocker housing 100, and the sealing end cover 110 is detachably connected (for example, by bolt connection) to the second side surface 130 of the rocker housing 100 through its edge, and a positioning hole (two positioning holes are provided in this embodiment) is provided on the sealing end cover 110, and two positioning pins 400 (for example, the positioning pins can be implemented as bolt positioning pins) are correspondingly connected to the second connecting plate 222, and the second connecting plate 222 is connected to the positioning holes on the sealing end cover 110 through the two positioning pins 400, so as to realize the positioning of the cooling device 200 in the rocker housing 100.

[0053] When installing the cooling device 200, the first end and the second end of the cooling device 200 are sequentially passed through the installation hole in the first direction to set at least a part of the cooling device 200 in the gear box 300. Two pipe passage holes are set at the position corresponding to the first end of the cooling device 200 on the first side surface 120 of the rocker housing 100, so that the first pipe opening 211 and the second pipe opening 212 of the cooling pipe 200 are connected to the coolant tank through the pipe passage holes through their respective connecting pipes 230. The positioning pin 400 on the second connecting plate 222 is inserted into the positioning hole of the sealing end cover 110, and the sealing end cover 110 is connected to the rocker housing 100 by bolts.

[0054] When removing the cooling device 200 , it is only necessary to remove the bolts used to fix the sealing end cover 110 to separate the sealing end cover 110 from the cooling device 200 , and then pull out the cooling device 200 through the mounting hole on the second side 130 of the rocker arm housing 100 .

[0055] The cooling device 200 is installed perpendicular to the length direction of the rocker arm housing 100, and there is no need to disassemble the rocker arm housing 100, so that the installation and removal of the cooling device 200 are very convenient.

[0056] Furthermore, an embodiment of the present invention provides a coal mining machine, the coal mining machine comprising: Figures 1 to 4 The shearer arm shown.

[0057] The rocker arm of the coal mining machine includes a rocker arm housing 100 , and a gear box 300 and a cooling device 200 arranged in the rocker arm housing 100 .

[0058] The cooling device 200 includes a first end portion and a second end portion opposite to each other, and the first end portion and the second end portion are ends opposite to each other in a length direction of the cooling device 200 .

[0059] The rocker housing 100 includes a first side surface 120 and a second side surface 130 opposite to each other, the first side surface 120 and the second side surface 130 extend in the length direction of the rocker housing 100, the first end of the cooling device 200 corresponds to the first side surface 120, the second end of the cooling device 200 corresponds to the second side surface 130, and a mounting hole for mounting or removing the cooling device 200 is provided at a position corresponding to the gear box 300 on the second side surface 130. The first direction is perpendicular to the first side surface 120 and the second side surface 130 of the rocker housing 100, that is, the cooling device 200 is mounted in the rocker housing 100 perpendicular to the length direction of the rocker housing 100.

[0060] The cooling device 200 includes a cooling pipe 200, and the cooling pipe 200 includes a first pipe opening 211 and a second pipe opening 212, and the first pipe opening 211 and the second pipe opening 212 are both arranged at the first end. The first pipe opening 211 is a coolant inlet, and the second pipe opening 212 is a coolant outlet. The first pipe opening 211 and the second pipe opening 212 pass through the first side surface 120 through their respective connecting pipes 230 and are connected to the coolant tank to realize the circulation of the coolant.

[0061] The cooling pipe 200 includes a straight section and a spiral section, the straight section extending from the first pipe opening 211 to the spiral section, and the spiral section spirally extending around the straight section to the second pipe opening 212 .

[0062] like Figure 3 As shown, the cooling device 200 further includes a positioning frame, and the cooling pipe 200 is arranged in the positioning frame.

[0063] The cooling pipe 200 is protected in the positioning frame, and its external dimensions are controllable, which is more conducive to the installation of the cooling device 200.

[0064] The positioning frame includes a first connecting plate 221 , a second connecting plate 222 and two side plates 223 . The side plates 223 are connected between the first connecting plate 221 and the second connecting plate 222 . The cooling pipe 200 is located in a space surrounded by the side plates 223 and the first connecting plate 221 and the second connecting plate 222 .

[0065] The first connecting plate 221 is disposed at the first end, and the second connecting plate 222 is disposed at the second end. The first connecting plate 221 is connected to the cooling pipe 200 , and the second connecting plate 222 is connected to the second side surface 130 of the rocker arm housing 100 .

[0066] The first pipe opening 211 and the second pipe opening 212 of the cooling pipe 200 pass through the first connecting plate 221 via respective connecting pipes 230 , so as to position the cooling pipe 200 in the positioning frame.

[0067] A sealing end cover 110 is connected to the mounting hole (which is used to mount the cooling device 200) on the second side surface 130 of the rocker arm housing 100. The sealing end cover 110 is connected to the rocker arm housing 100 by bolts. Two positioning holes are provided on the sealing end cover 110. Two positioning pins 400 are correspondingly connected to the second connecting plate 222. The second connecting plate 222 is connected to the positioning holes on the sealing end cover 110 by the two positioning pins, thereby realizing the positioning of the cooling device 200 in the rocker arm housing 100.

[0068] The coal mining machine rocker arm provided in an embodiment of the present invention installs the cooling device in the gear box inside the rocker arm housing perpendicular to the length direction of the rocker arm. The cooling device can be directly inserted into the rocker arm housing or directly pulled out from the rocker arm housing without disassembling the rocker arm housing to install and remove the cooling device, making the installation and disassembly of the cooling device more convenient and occupying less space in the gear box.

[0069] Unless otherwise defined, the technical terms or scientific terms used in the present invention shall have the meanings understood by ordinary technicians in the field to which the present invention belongs. The "first", "second" and similar words used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, "one" or "one" and other similar words do not indicate quantity restrictions, but indicate the existence of at least one. "Connect" or "connected" and other similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship also changes accordingly.

[0070] The terms used herein are only for describing specific implementation purposes and are not intended to limit the present invention. Terms such as "part" and "component" appearing in this article may represent either a single part or a combination of multiple parts. Terms such as "installation" and "setting" appearing in this article may represent either a part being directly attached to another part or a part being attached to another part through an intermediate. Features described in this article in one embodiment may be applied to another embodiment alone or in combination with other features, unless the feature is not applicable in the other embodiment or otherwise specified.

[0071] Those skilled in the art will readily appreciate other embodiments of the present invention after considering the specification and practicing the invention disclosed herein. The present invention is intended to cover any variations, uses or adaptations of the present invention that follow the general principles of the present invention and include common knowledge or customary techniques in the art that are not disclosed by the present invention. The description and examples are to be considered exemplary only.

[0072] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A rocker arm of a coal mining machine, characterized in that: The invention comprises a rocker housing, a gear box and a cooling device arranged in the rocker housing, wherein the rocker housing comprises a first side surface and a second side surface opposite to each other, the first side surface and the second side surface extend along the length direction of the rocker housing, and a mounting hole is arranged at a position corresponding to the gear box on the second side surface, and the cooling device can be inserted into the gear box through the mounting hole; The cooling device comprises a first end and a second end opposite to each other, the second end being connected to the second side surface, the first end and the second end being located in a first direction, and the first direction intersects with a length direction of the rocker arm housing; The cooling device comprises a cooling liquid inlet and a cooling liquid outlet, wherein the cooling liquid inlet and the cooling liquid outlet are both arranged at the first end, and the first side surface is provided with a through hole corresponding to the cooling liquid inlet and the cooling liquid outlet; The cooling device comprises a cooling pipe, the cooling pipe comprises a first pipe opening and a second pipe opening, the first pipe opening corresponds to the coolant inlet, and the second pipe opening corresponds to the coolant outlet; The cooling device further comprises a positioning frame, and the cooling pipe is arranged in the positioning frame; The positioning frame includes a first connecting plate, a second connecting plate and a side plate, the side plate is connected between the first connecting plate and the second connecting plate, the cooling pipe is located in a space surrounded by the side plate and the first connecting plate and the second connecting plate, the first connecting plate is arranged at the first end, the second connecting plate is arranged at the second end, the first connecting plate is connected to the cooling pipe, and the second connecting plate is connected to the second side surface of the rocker arm housing; It also includes a sealing end cover arranged at the mounting hole, and the second connecting plate is connected to the second side surface through the sealing end cover.

2. The rocker arm of the coal mining machine according to claim 1, characterized in that: The cooling pipe includes a straight section and a spiral section, the straight section extending from the first pipe opening to the spiral section, and the spiral section extending around the straight section to the second pipe opening.

3. The rocker arm of the coal mining machine according to claim 2, characterized in that: A positioning hole is provided in the middle of the sealing end cover, and a positioning pin matched with the positioning hole is provided on the second connecting plate.

4. A coal mining machine, characterized in that: It comprises the coal mining machine rocker arm as described in any one of claims 1-3.

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