Electric traction equal-height coal mining machine and thin coal seam coal mining system

Abstract

The invention discloses an electric traction equal-height coal mining machine and a thin coal seam coal mining system.The electric traction equal-height coal mining machine comprises a double-output motor, a first cutting roller, a second cutting roller, a first traction module and a second traction module, and the double-output motor is provided with a first output end and a second output end; the first cutting roller and the second cutting roller are in transmission connection with the first output end and the second output end respectively, and the first traction module is arranged close to the first output end. The first traction module comprises a first semi-permanent magnet direct drive motor, a first planetary transmission module, a first transmission assembly and a first chain wheel which are sequentially in transmission connection in the direction parallel to the central axis of the first cutting roller; the first chain wheel and the second chain wheel are used for being matched with the gear to drag the coal mining machine in the roadway direction. The electric traction equal-height coal mining machine is compact in structure, small in size, large in coal passing space and capable of achieving vertical feeding at any position.

Description

Technical Field

[0001] The invention belongs to the technical field of coal mine mechanical equipment, and in particular relates to an electric traction contour coal mining machine and a thin coal seam coal mining system. Background Art

[0002] Traditional rocker-arm thin-seam coal mining machines are large in size and complex in structure. The equi-height thin-seam coal mining machines proposed in related technologies have the advantages of simple structure and strong cutting power. However, due to their structural limitations, they cannot achieve vertical feed at any position in the tunnel, and chain traction will inevitably cause problems such as chain entanglement, wear, and loose chain when cutting over long distances. Summary of the invention

[0003] The present invention aims to solve at least one of the technical problems in the related art to a certain extent. To this end, an embodiment of the present invention provides an electric traction contour coal mining machine, which realizes a small-volume electric traction drive and can achieve vertical cutting at any position in the tunnel.

[0004] Another aspect of the present invention provides a thin coal seam mining system.

[0005] An electric traction contour coal mining machine according to an embodiment of the present invention comprises: a dual-output motor, the dual-output motor having a first output end and a second output end; a first cutting drum and a second cutting drum, the first cutting drum and the second cutting drum being transmission-connected to the first output end and the second output end respectively, and the central axis of the first cutting drum being parallel to the central axis of the second cutting drum; a first traction module, the first traction module being arranged adjacent to the first output end, the first traction module comprising a first semi-permanent magnet direct-drive motor, a first planetary transmission module, a first transmission assembly and a first sprocket which are transmission-connected in sequence in a direction parallel to the central axis of the first cutting drum; a second traction module, the second traction module being arranged adjacent to the second output end, the second traction module comprising a second semi-permanent magnet direct-drive motor, a second planetary transmission module, a second transmission assembly and a second sprocket which are transmission-connected in sequence in a direction parallel to the central axis of the second cutting drum; wherein the first sprocket and the second sprocket are used to connect a traction chain, and the traction chain is used to traction the coal mining machine along the tunnel direction.

[0006] The electric traction contour coal mining machine according to the embodiment of the present invention has a compact structure, small size, large coal passing space, and can achieve vertical feed at any position. The first semi-permanent magnet direct-drive motor of the first traction module and the first planetary transmission module can achieve stepless frequency conversion speed regulation and have large traction force, which can effectively avoid chain entanglement, wear, and loose chain problems caused by insufficient traction force during long-distance cutting.

[0007] In some embodiments, an end of the first cutting drum away from the first output end is aligned with an end of the second cutting drum away from the second output end in a direction perpendicular to a central axis of the first cutting drum.

[0008] In some embodiments, the first transmission assembly includes a first output gear, a first matching gear and a first transmission shaft, the first output gear is connected to the output end of the first planetary transmission module, the first output gear is meshed with the first matching gear, the first matching gear is transmission-connected to the first transmission shaft, and the first transmission shaft is connected to the first sprocket; the second transmission assembly includes a second output gear, a second matching gear and a second transmission shaft, the second output gear is connected to the output end of the second planetary transmission module, the second output gear is meshed with the second matching gear, the second matching gear is transmission-connected to the second transmission shaft, and the second transmission shaft is connected to the second sprocket.

[0009] In some embodiments, the central axis of the first output end and the central axis of the second output end are both perpendicular to the central axis of the first cutting drum, and the electric traction contour coal mining machine includes a first cutting transmission module and a second cutting transmission module. The first cutting drum is connected to the first output end through the first cutting transmission module, and the second cutting drum is connected to the second output end through the second cutting transmission module.

[0010] In some embodiments, the first cutting transmission module includes a first bevel gear and a second bevel gear meshing with each other, the first bevel gear is connected to the first output end, the second bevel gear is connected to the first cutting drum, and the center axis of the first bevel gear is perpendicular to the center axis of the second bevel gear; the second cutting transmission module includes a third bevel gear and a fourth bevel gear meshing with each other, the third bevel gear is connected to the second output end, the fourth bevel gear is connected to the second cutting drum, and the center axis of the third bevel gear is perpendicular to the center axis of the fourth bevel gear.

[0011] In some embodiments, the first cutting transmission module also includes a first torque shaft, a first spur gear, a second spur gear and a third planetary transmission module, one end of the first torque shaft is connected to the second bevel gear, the other end of the first torque shaft is connected to the first spur gear, the second spur gear is meshed with the first spur gear, the central axis of the second spur gear is located on the side of the central axis of the first spur gear away from the second cutting drum, the third planetary transmission module is transmission-connected to the second spur gear, and the output end of the third planetary transmission module is transmission-connected to the first cutting drum to drive the first cutting drum to rotate; the second cutting transmission module also includes a second torque shaft, a third spur gear, a fourth spur gear and a fourth planetary transmission module, one end of the second torque shaft is connected to the fourth bevel gear, the other end of the second torque shaft is connected to the third spur gear, the fourth spur gear is meshed with the third spur gear, the central axis of the fourth spur gear is located on the side of the central axis of the third spur gear away from the first cutting drum, the fourth planetary transmission module is transmission-connected to the fourth spur gear, and the output end of the fourth planetary transmission module is transmission-connected to the second cutting drum to drive the second cutting drum to rotate.

[0012] In some embodiments, it also includes a planetary transmission fixed frame, the extension direction of the planetary transmission fixed frame is parallel to the axial direction of the dual output motor, the planetary transmission fixed frame is connected to the third planetary transmission module and the fourth planetary transmission module, the planetary transmission fixed frame, the first cutting drum and the second cutting drum are located on the same side of the dual output motor, and the planetary transmission fixed frame and the dual output motor are spaced apart to form a coal passing window.

[0013] In some embodiments, it also includes an electric control module, a lubrication module and a cooling module, and the electric control module, the lubrication module and the cooling module are arranged in sequence on a side of the dual output motor away from the first cutting roller in a direction perpendicular to the axial direction of the first cutting roller.

[0014] In some embodiments, the maximum traction force of the first traction module or the second traction module is greater than or equal to 400 KN; and / or the power of the dual-output motor is greater than or equal to 500 kW.

[0015] Another embodiment of the present invention provides a thin coal seam mining system, including the electric traction contour mining machine according to any one of the above embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of an electric traction contour coal mining machine according to an embodiment of the present invention.

[0017] Figure 2It is a schematic diagram of the internal structure of the electric traction contour coal mining machine according to an embodiment of the present invention.

[0018] Figure 3 It is a working schematic diagram of the thin coal seam mining system according to an embodiment of the present invention. DETAILED DESCRIPTION

[0019] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0020] According to the following Figure 1-Figure 3 The electric traction contour coal mining machine and thin coal seam coal mining system according to the embodiment of the present invention are described, which are characterized by comprising a dual output motor 4, a first cutting drum 1, a second cutting drum 7, a first traction module 2 and a second traction module 6.

[0021] The dual output motor 4 has two output ends: a first output end and a second output end. The first cutting drum 1 and the second cutting drum 7 are respectively connected to the first output end and the second output end of the dual output motor 4, and the central axis of the first cutting drum 1 is parallel to the central axis of the second cutting drum 7. The first output end of the dual output motor 4 drives the first cutting drum 1 to rotate, and the second output end of the dual output motor 4 drives the second cutting drum 7 to rotate. The first cutting drum 1 and the second cutting drum 7 rotate, and the cutting teeth thereon cut the coal seam and cut off the coal blocks on the coal seam.

[0022] During operation, the electric traction contour coal mining machine moves along the roadway. In order to tow the electric traction contour coal mining machine along the direction of the roadway, the electric traction contour coal mining machine includes a first traction module 2 and a second traction module 6.

[0023] The first traction module 2 is disposed adjacent to the first output end of the dual-output motor 4. Figure 2 As shown, the first traction module 2 includes a first semi-permanent magnet direct drive motor 202 , a first planetary transmission module 203 , a first transmission assembly and a first sprocket 10 which are sequentially connected in a direction parallel to the central axis of the first cutting drum 1 .

[0024] The second traction module 6 is arranged adjacent to the second output end of the dual output motor 4. Figure 2 As shown, the second traction module 6 includes a second semi-permanent magnet direct drive motor, a second planetary transmission module, a second transmission assembly and a second sprocket 10 which are sequentially connected in a direction parallel to the central axis of the second cutting drum. The structure of the second traction module 6 is similar to that of the first traction module 2, so it is not Figure 2 Components of the second traction module 6 are marked one by one, and the second traction module 6 can be understood by referring to the first traction module 2 .

[0025] The first sprocket 10 and the second sprocket 10 are used to connect a traction chain, and the traction chain is used to pull the electric traction isohyster along the tunnel direction.

[0026] The electric traction contour coal mining machine according to the embodiment of the present invention has a compact structure, small size, large coal passing space, and can achieve vertical feed at any position. The first semi-permanent magnet direct-drive motor of the first traction module and the first planetary transmission module can achieve stepless frequency conversion speed regulation and have large traction force, which can effectively avoid chain entanglement, wear, and loose chain problems caused by insufficient traction force during long-distance cutting.

[0027] In some embodiments, Figure 1 and Figure 2 As shown, the first cutting drum 1 and the first traction module 2 are symmetrical in structure with respect to the dual output motor 4 and the second cutting drum 7 and the second traction module 6 .

[0028] In some embodiments, Figure 1 and Figure 2 As shown, the end of the first cutting drum 1 away from the first output end of the dual output motor 4 ( Figure 2 The left end of the first cutting drum 1 in the middle) and the end of the second cutting drum 7 away from the second output end of the dual output motor 4 ( Figure 2 The left end of the second cutting drum 7 in the middle) is aligned in a direction perpendicular to the central axis of the first cutting drum 1 (or the central axis of the second cutting drum 7). Figure 2 In the illustrated embodiment, the central axis of the first cutting drum 1 and the central axis of the second cutting drum 7 extend in the left-right direction.

[0029] In some embodiments, Figure 2 As shown, the first transmission assembly of the first traction module 2 includes a first output gear 204, a first matching gear 205 and a first transmission shaft 206. The first output gear 204 is connected to the output end of the first planetary transmission module 203, the first output gear 204 is meshed with the first matching gear 205, the first matching gear 205 is transmission-connected to the first transmission shaft 206, and the first transmission shaft 206 is connected to the first sprocket 10.

[0030] like Figure 2 As shown, the first semi-permanent magnet direct drive motor 202, the first planetary transmission module 203, the first output gear 204, the first matching gear 205, the first transmission shaft 206 and the first sprocket 10 of the first traction module 2 are arranged in sequence from left to right. The first traction module 2 is located as a whole on the right side of the first cutting drum 1, and is located as a whole on the side of the first output end of the dual-output motor 4 away from the second output end. The first traction module 2 can achieve stepless frequency conversion speed regulation and has large traction force.

[0031] The second transmission assembly of the second traction module 6 includes a second output gear, a second matching gear and a second transmission shaft, the second output gear is connected to the output end of the second planetary transmission module, the second output gear is meshed with the second matching gear, the second matching gear is transmission-connected to the second transmission shaft, and the second transmission shaft is connected to the second sprocket. The structure of the second transmission assembly can refer to the first transmission assembly, and the present invention will not be repeated here.

[0032] like Figure 2 As shown, the first traction module 2 and the second traction module 6 are symmetrical in structure relative to the dual-output motor 4 .

[0033] In some embodiments, Figure 1 As shown, the central axis of the first output end and the central axis of the second output end of the dual-output motor 4 are both perpendicular to the central axis of the first cutting drum 1 (or the central axis of the second cutting drum 7). The electric traction equal height coal mining machine includes a first cutting transmission module 3 and a second cutting transmission module 5. The first cutting drum 1 is connected to the first output end through the first cutting transmission module 3, and the second cutting drum 7 is connected to the second output end through the second cutting transmission module 5.

[0034] Specifically, the axial direction of the dual output motor 4 is orthogonal to the central axis of the first cutting drum 1 (or the central axis of the second cutting drum 7), and the central axis of the first output end coincides with the central axis of the second output end. The dual output motor 4 is driven so that both the first output end and the second output end can output kinetic energy.

[0035] like Figure 2 As shown, the first cutting transmission module 3 includes a first bevel gear 303 and a second bevel gear 305 meshing with each other, the central axis of the first bevel gear 303 coincides with the central axis of the first output end, and the first bevel gear 303 is connected to the first output end. Specifically, a first spline shaft 302 is provided on the end face of the first output end, and the first spline shaft 302 is connected to the first bevel gear 303 through a gear shaft. A first bearing 304 is also provided on the side of the first bevel gear 303 away from the first output end. The kinetic energy output by the first output end is transmitted to the first bevel gear 303 through the first spline shaft 302 and the gear shaft, driving the first bevel gear 303 to rotate.

[0036] The second bevel gear 305 is connected to the first cutting drum 1, and the central axis of the first bevel gear 303 is perpendicular to the central axis of the second bevel gear 305. A second bearing 306 is also provided on the side of the second bevel gear 305 away from the first cutting drum 1. Since the first bevel gear 303 and the second bevel gear 305 are meshed with each other, the rotation of the first bevel gear 303 can drive the second bevel gear 305 to rotate. Since the central axis of the first bevel gear 303 is perpendicular to the central axis of the second bevel gear 305, the direction of kinetic energy transmission is turned, and the dual output motor 4 drives the first cutting drum 1.

[0037] Furthermore, the first cutting transmission module 3 also includes a first torque shaft 307, a torque shaft protection sleeve 308, a first spur gear 309, a third bearing 310, a fourth bearing 311, a second spur gear 312, a second spline shaft 313, and a third planetary transmission module. Figure 2 As shown, one end of the first torque shaft 307 ( Figure 2 The right end of the first torque shaft 307 is connected to the second bevel gear 305, and the other end of the first torque shaft 307 ( Figure 2 The left end of the first bevel gear 305 is connected to the first spur gear 309, and the torque shaft protection sleeve 308 is sleeved with the first torque shaft 307. The third bearing 310 is located on the side of the first spur gear 309 away from the second bevel gear 305 and is connected to the first torque shaft 307. The second spur gear 312 is meshed with the first spur gear 309, as shown in FIG. Figure 2 As shown, the central axis of the second spur gear 312 is located on the side of the central axis of the first spur gear 309 away from the second cutting drum 7 .

[0038] The fourth bearing 311 is located on the side of the second spur gear 312 away from the first cutting drum 1 ( Figure 2 The right end of the second spline shaft 313 ( Figure 2 The second spur gear 312 is connected to the third planetary transmission module through the second spline shaft 313. The output end of the third planetary transmission module is connected to the first cutting drum 1 to drive the first cutting drum 1 to rotate.

[0039] like Figure 2As shown, the third planetary transmission module specifically includes a primary transmission inner gear ring 314, a fifth bearing 315, a primary transmission planetary wheel 316, a secondary transmission inner gear ring 317, a primary transmission planetary carrier 318, a primary planetary wheel bearing 319, a primary transmission sun gear 320, a secondary transmission planetary wheel 321, a secondary planetary carrier support bearing I 322, a secondary sun gear 323, a secondary planetary carrier 324 and a secondary planetary carrier support bearing II 325. The primary transmission inner gear ring 314, the fifth bearing 315, the primary transmission planetary wheel 316, the primary transmission planetary carrier 318, the primary planetary wheel bearing 319, and the primary transmission sun gear 320 constitute a primary planetary transmission assembly, and the secondary transmission inner gear ring 317, the secondary transmission planetary wheel 321, the secondary planetary carrier support bearing I 322, the secondary sun gear 323, the secondary planetary carrier 324 and the secondary planetary carrier support bearing II 325 constitute a secondary planetary assembly. The primary planetary assembly and the secondary planetary assembly are opposite in the axial direction of the first cutting drum 1. Specifically, the primary transmission planetary gear 316 is transmission-connected to the primary transmission sun gear 320, and the primary transmission sun gear 320 is arranged on the primary transmission planetary carrier 318, the primary transmission planetary carrier 318 is connected to the secondary sun gear 323 through a connecting shaft, the connecting shaft is supported by the secondary planetary carrier support bearing Ⅰ322, the secondary sun gear 323 is transmission-connected to the secondary transmission planetary gear 321, and the secondary transmission planetary gear 321 is arranged on the secondary planetary carrier 324.

[0040] The second cutting transmission module 5 includes a third bevel gear and a fourth bevel gear meshing with each other, the third bevel gear is connected to the second output end, the fourth bevel gear is connected to the second cutting drum 7, and the central axis of the third bevel gear is perpendicular to the central axis of the fourth bevel gear.

[0041] The second cutting transmission module 5 also includes a second torque shaft, a third spur gear, a fourth spur gear and a fourth planetary transmission module, one end of the second torque shaft is connected to the fourth bevel gear, the other end of the second torque shaft is connected to the third spur gear, the fourth spur gear is meshed with the third spur gear, the center axis of the fourth spur gear is located on the side of the center axis of the third spur gear away from the first cutting drum, the fourth planetary transmission module is transmission connected to the fourth spur gear, and the output end of the fourth planetary transmission module is transmission connected to the second cutting drum to drive the second cutting drum to rotate.

[0042] The detailed structure of the second cutting and transmission module 5 may refer to the first cutting and transmission module 3, and the present invention will not be elaborated here.

[0043] In some embodiments, Figure 1As shown, the electric traction equal height coal mining machine also includes a planetary transmission fixed frame 8, the extension direction of the planetary transmission fixed frame 8 is parallel to the axial direction of the dual output motor 4, the planetary transmission fixed frame 8 is connected to the third planetary transmission module and the fourth planetary transmission module, and the planetary transmission fixed frame 8, the first cutting drum 1 and the second cutting drum 7 are located on the same side of the dual output motor 4 ( Figure 2 The planetary transmission fixed frame 8 and the dual output motor 4 are spaced apart to form a coal passing window 15. The arrangement of the planetary transmission fixed frame 8 enhances the structural lightness of the electric traction iso-height coal mining machine.

[0044] like Figure 1 As shown, the planetary transmission fixing frame 8 is located on one side of the first cutting drum 1 and the second cutting drum 7 adjacent to the dual output motor 4. There is no redundant structure between the cutting drums, the coal passing space is large, and vertical feed can be achieved at any position of the coal mining face.

[0045] like Figure 1 As shown, the electric traction equal height coal mining machine also includes a frame 12, and the dual output motor 4, the first cutting transmission module 3, the second cutting transmission module 5, the first traction module 2 and the second traction module 6 are all arranged on the frame 12.

[0046] In some embodiments, the electric traction contour coal mining machine further includes an electric control module 11, a lubrication module 13 and a cooling module 14, wherein the electric control module 11, the lubrication module 13 and the cooling module 14 are all arranged on the frame, and Figure 1 As shown, the electric control module 11 , the lubrication module 13 and the cooling module 14 are sequentially arranged on a side of the dual-output motor 4 away from the first cutting drum 1 along a direction perpendicular to the axial direction of the first cutting drum 1 .

[0047] In some optional embodiments, the maximum traction force of the first traction module 2 or the second traction module 6 is greater than or equal to 400 KN.

[0048] In some optional embodiments, the power of the dual-output motor 4 is greater than or equal to 500 kW, and a maximum cutting power of 500 kW for a single cutting drum can be achieved.

[0049] A thin coal seam mining system according to another embodiment of the present invention comprises an electric traction contour mining machine according to any one of the above embodiments.

[0050] like Figure 3 As shown, during operation, the first cutting drum 1 and the second cutting drum 7 of the electric traction contour coal mining machine are arranged at intervals in the traction direction of the roadway (as shown by the arrow in the figure) and face the coal wall side. The electric traction contour coal mining machine provided by the embodiment of the present invention can realize vertical cutting at any position of the coal mining working face. When performing the cutting operation, the first traction module 2 and the second traction module 6 cooperate with the track laid in the roadway to guide the electric traction contour coal mining machine in the traction direction (as shown by the arrow in the figure) Figure 3 The machine moves back and forth in the left and right directions (in the middle) to carry out reciprocating coal cutting.

[0051] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0052] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0053] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0054] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0055] In the present invention, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0056] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. An electric traction contour coal mining machine, characterized in that: include: A dual output motor having a first output terminal and a second output terminal; a first cutting drum and a second cutting drum, wherein the first cutting drum and the second cutting drum are respectively connected to the first output end and the second output end by transmission, and the central axis of the first cutting drum is parallel to the central axis of the second cutting drum; A first traction module, the first traction module is arranged adjacent to the first output end, the first traction module comprises a first semi-permanent magnet direct drive motor, a first planetary transmission module, a first transmission assembly and a first sprocket which are sequentially connected in a direction parallel to the central axis of the first cutting drum; A second traction module, the second traction module is arranged adjacent to the second output end, the second traction module comprises a second semi-permanent magnet direct drive motor, a second planetary transmission module, a second transmission assembly and a second sprocket which are sequentially connected in a direction parallel to the central axis of the second cutting drum; Wherein, the first sprocket and the second sprocket are used to cooperate with gears to pull the coal mining machine along the tunnel direction.

2. The electric traction contour coal mining machine according to claim 1, characterized in that: An end of the first cutting drum away from the first output end is aligned with an end of the second cutting drum away from the second output end in a direction perpendicular to a central axis of the first cutting drum.

3. The electric traction contour coal mining machine according to claim 1, characterized in that: The first transmission assembly includes a first output gear, a first matching gear and a first transmission shaft, the first output gear is connected to the output end of the first planetary transmission module, the first output gear is meshed with the first matching gear, the first matching gear is transmission-connected to the first transmission shaft, and the first transmission shaft is connected to the first sprocket; The second transmission assembly includes a second output gear, a second matching gear and a second transmission shaft, the second output gear is connected to the output end of the second planetary transmission module, the second output gear is meshed with the second matching gear, the second matching gear is transmission-connected to the second transmission shaft, and the second transmission shaft is connected to the second sprocket.

4. The electric traction contour coal mining machine according to claim 1, characterized in that: The central axis of the first output end and the central axis of the second output end are both perpendicular to the central axis of the first cutting drum. The electric traction contour coal mining machine includes a first cutting transmission module and a second cutting transmission module. The first cutting drum is connected to the first output end through the first cutting transmission module, and the second cutting drum is connected to the second output end through the second cutting transmission module.

5. The electric traction contour coal mining machine according to claim 4, characterized in that: The first cutting transmission module comprises a first bevel gear and a second bevel gear meshing with each other, the first bevel gear is connected to the first output end, the second bevel gear is connected to the first cutting drum, and the central axis of the first bevel gear is perpendicular to the central axis of the second bevel gear; The second cutting transmission module includes a third bevel gear and a fourth bevel gear meshing with each other, the third bevel gear is connected to the second output end, the fourth bevel gear is connected to the second cutting drum, and the central axis of the third bevel gear is perpendicular to the central axis of the fourth bevel gear.

6. The electric traction contour coal mining machine according to claim 5, characterized in that: The first cutting transmission module also includes a first torque shaft, a first spur gear, a second spur gear and a third planetary transmission module, one end of the first torque shaft is connected to the second bevel gear, the other end of the first torque shaft is connected to the first spur gear, the second spur gear is meshed with the first spur gear, the central axis of the second spur gear is located on the side of the central axis of the first spur gear away from the second cutting drum, the third planetary transmission module is drivingly connected to the second spur gear, and the output end of the third planetary transmission module is drivingly connected to the first cutting drum to drive the first cutting drum to rotate; The second cutting transmission module also includes a second torque shaft, a third spur gear, a fourth spur gear and a fourth planetary transmission module, one end of the second torque shaft is connected to the fourth bevel gear, the other end of the second torque shaft is connected to the third spur gear, the fourth spur gear is meshed with the third spur gear, the center axis of the fourth spur gear is located on the side of the center axis of the third spur gear away from the first cutting drum, the fourth planetary transmission module is transmission connected to the fourth spur gear, and the output end of the fourth planetary transmission module is transmission connected to the second cutting drum to drive the second cutting drum to rotate.

7. The electric traction contour coal mining machine according to claim 6, characterized in that: It also includes a planetary transmission fixing frame, the extension direction of which is parallel to the axial direction of the dual-output motor, the planetary transmission fixing frame is connected to the third planetary transmission module and the fourth planetary transmission module, the planetary transmission fixing frame, the first cutting drum and the second cutting drum are located on the same side of the dual-output motor, and the planetary transmission fixing frame and the dual-output motor are spaced apart to form a coal passing window.

8. The electric traction contour coal mining machine according to claim 1, characterized in that: It also includes an electric control module, a lubrication module and a cooling module, which are arranged in sequence on a side of the dual-output motor away from the first cutting roller in a direction perpendicular to the axial direction of the first cutting roller.

9. The electric traction contour coal mining machine according to claim 1, characterized in that: The maximum traction force of the first traction module or the second traction module is greater than or equal to 400KN; and / or, The power of the dual-output motor is greater than or equal to 500 kW.

10. A thin coal seam mining system, characterized in that: It comprises an electric traction contour coal mining machine according to any one of claims 1-9.

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