Thin seam inner rocker arm type coal mining machine

Abstract

The present application provides a kind of thin coal seam inner rocker arm type coal winning machine, belong to the technical field of coal mining equipment, including coal winning machine body, drive device, transmission device, rocker arm, rocker arm drive part and cutting drum;Coal winning machine body is arranged with coal window along the central axis;Drive device is installed in the coal winning machine body, and is located in the goaf side of coal winning machine body;Two groups of rocker arms are vertically rotatably installed on the coal winning machine body, are symmetrically arranged on the two sides of coal window, are driven to rotate by rocker arm drive part;Cutting drum is rotatably installed on the rocker arm, is located in the coal wall side of coal winning machine body, the rotation axis of cutting drum is parallel with the rotation axis of rocker arm and does not coincide;Two groups of transmission devices are symmetrically arranged on the two sides of the central axis of coal winning machine body, are located in the coal winning machine body, rocker arm and cutting drum, power provided by drive device is transmitted to cutting drum.The present application is simple in structure, reasonable in design, can reduce coal winning machine failure, improve the cutting efficiency of coal winning machine.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of coal mining equipment, and specifically discloses a thin coal seam inner rocker arm type coal mining machine. BACKGROUND

[0002] The thin coal seam reserves in China account for about 18% of the total coal reserves in China. Since the thin coal seams are mostly located in the edge zone of the coalfield, the occurrence conditions are complex, and geological structures such as faults, folds, undulations and parting are often present in the thin coal seam working face. Moreover, since the mining height is mostly below 1.5 m, the space is narrow, and the thin coal seam equipment is required to have higher strength and a more flexible structure. Although the existing thin coal seam coal mining machine can meet the cutting of the thin coal seam in height, the overall structure is relatively complex due to the influence of the traditional coal mining machine design, which increases the failure points of the coal mining machine, and the machine body direction is relatively long, which requires wider transportation roadway and ventilation roadway, increases the tunneling cost, and the long machine body needs to be constantly adjusted to cut the triangular coal at both ends of the coal mining working face, which increases the cutting time. In addition, the maintenance of the long machine body coal mining machine in the low and narrow thin coal seam roadway is also a formidable challenge. SUMMARY

[0003] The present application provides a thin coal seam inner rocker arm type coal mining machine, which has simple structure, reasonable design, can reduce the failure of the coal mining machine, improve the cutting efficiency of the coal mining machine, and provide a basis for exploring new coal mining technology.

[0004] The thin coal seam inner rocker arm type coal mining machine comprises a coal mining machine body, a driving device, a transmission device, a rocker arm, a rocker arm driving part and a cutting drum. The coal mining machine body is provided with a coal passing window along the central axis. The driving device is installed in the coal mining machine body and located at the goaf side of the coal mining machine body. Two groups of rocker arms are vertically rotatably installed on the coal mining machine body and symmetrically arranged on both sides of the coal passing window and driven to rotate by the rocker arm driving part. The cutting drum is rotatably installed on the rocker arm and located at the coal wall side of the coal mining machine body. The rotation axis of the cutting drum is parallel to and does not coincide with the rotation axis of the rocker arm. Two groups of transmission devices are symmetrically arranged on both sides of the central axis of the coal mining machine body and located in the coal mining machine body, the rocker arm and the cutting drum, and transmit the power provided by the driving device to the cutting drum.

[0005] Further, the driving device is a transversely arranged double-output motor; the transmission device comprises a torque shaft, a bevel gear I, a bevel gear II, a transmission shaft, a primary gear, a secondary gear, a secondary gear shaft, a tertiary gear, a tertiary gear shaft, a spline gear and a planetary reducer; the torque shaft is transversely arranged in the shearer body and rotatably connected with the output shaft of the double-output motor at the first end and rotatably connected with the bevel gear I at the second end; the transmission shaft is vertically arranged in the shearer body and the rocker arm and rotatably connected with the shearer body and the rocker arm respectively, rotatably connected with the bevel gear II at the first end and rotatably connected with the primary gear at the second end; the bevel gear II and the bevel gear I are vertically engaged; the secondary gear shaft is fixedly installed in the rocker arm and parallel to the transmission shaft; the secondary gear is rotatably installed on the secondary gear shaft and engaged with the primary gear; the tertiary gear shaft is rotatably installed in the rocker arm and parallel to the secondary gear shaft; the tertiary gear is fixedly installed on the tertiary gear shaft and engaged with the secondary gear; the input end of the spline gear is connected with the tertiary gear shaft, and the output end is connected with the input end of the planetary reducer; the planetary reducer is arranged in the rocker arm and the cutting drum, the output end is connected with the cutting drum, and the cutting drum is driven to rotate.

[0006] Further, the transmission device further comprises a bearing I, a bearing II, a bearing III and a bearing IV; the torque shaft is rotatably connected with the shearer body through the bearing I; the bearing II is installed in the shearer body and supports the bevel gear II; the inner ring of the bearing III is fixedly connected with the transmission shaft, and the outer ring is fixedly connected with the rocker arm; the tertiary gear shaft is rotatably connected with the rocker arm through the bearing IV.

[0007] Further, the two bearings III are respectively located on the two sides of the primary gear, and are respectively a bearing IIIa and a bearing IIIb; a rotating sealing cover is installed on the outer side of the bearing IIIa; a bearing end cover is installed on the outer side of the bearing IIIb; the two bearings III are both single-row roller bearings.

[0008] Further, the secondary gear is an idler gear and is rotatably installed on the secondary gear shaft through a bearing V.

[0009] Further, the planetary reducer is a two-stage planetary reducer.

[0010] Further, the rocker arm is connected with the shearer body through a rotating sleeve; the inner wall of the rotating sleeve is fixed on the shearer body, and the outer wall is rotatably connected with the rocker arm.

[0011] Further, the rocker arm driving part is a rocker arm oil cylinder, and the two ends are connected with the shearer body and the rocker arm through oil cylinder ear seats respectively.

[0012] Further, the cutting drum comprises a cylindrical structure, an arc-shaped end face and cutting teeth; the planetary reducer passes through the first end of the cylindrical structure, and the output end is fixedly connected with the cylindrical structure; the arc-shaped end face is arranged at the second end of the cylindrical structure and protrudes outward; the cutting teeth are distributed outside the cylindrical structure and the arc-shaped end face.

[0013] Further, the bottom of the coal mining machine body is further provided with a sliding shoe assembly.

[0014] Compared with the prior art, the present application has the following beneficial effects:

[0015] 1. The horizontally arranged double output motor is the core component of the coal mining machine, and forms a concave arrangement with the two side transmission devices, greatly reducing the center distance between the two cutting drums (the minimum center distance between the two cutting drums of the existing rocker arm type coal mining machine can reach 2185mm, while the minimum center distance of the thin coal seam inner rocker arm type coal mining machine provided by the present application is about 1.7m), so that the coal mining machine can realize inner rocker arm swinging, the whole coal mining machine structure is simple, and the failure points are reduced.

[0016] 2. The height of the cutting drum can be adjusted by the rocker arm of the coal mining machine, so as to expand the mining height range of the thin coal seam coal mining machine.

[0017] 3. Since the body of the coal mining machine is short, and the end part of the cutting drum is designed in an arc shape, it can vertically cut at both ends of the coal mining working face, providing equipment foundation for exploring new cutting methods, and when cutting in the thin coal seam working face, it can be pulled to the transport roadway or ventilation roadway on both sides for maintenance, so that the maintenance is more convenient. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the following will briefly introduce the drawings needed to be used in the specific embodiments or the prior art description. Obviously, the drawings in the following description are some embodiments of the present application, and those skilled in the art can also obtain other drawings according to these drawings without creative labor.

[0019] Figure 1 is a front view of the thin coal seam inner rocker arm type coal mining machine (the rocker arm oil cylinder is not in action);

[0020] Figure 2 is a front view of the thin coal seam inner rocker arm type coal mining machine (the rocker arm oil cylinder is in action);

[0021] Figure 3 is a top view of the thin coal seam inner rocker arm type coal mining machine;

[0022] Figure 4 is an operation diagram of the thin coal seam inner rocker arm type coal mining machine.

[0023] In the drawings: 1-coal mining machine body; 101-coal passing window; 2-double output motor;

[0024] 301-torque shaft; 302-bevel gear I; 303-bearing I; 304-bevel gear II; 305-bearing II; 306-transmission shaft; 307-rotary seal cover; 3081-bearing IIIa; 3082-bearing IIIb; 309-bearing end cover; 310-primary gear; 311-secondary gear; 312-secondary gear shaft; 313-tertiary gear and gear shaft; 314-bearing IV; 315-spline gear; 316-secondary planetary reducer;

[0025] 401-rocker arm; 402-rotary sleeve; 5-rocker arm oil cylinder;

[0026] 601-cylinder structure; 602-arc-shaped end face; 603-cutter;

[0027] 701-left front sliding shoe assembly; 702-left rear sliding shoe assembly; 703-right front sliding shoe assembly; 704-right rear sliding shoe assembly. DETAILED DESCRIPTION

[0028] The technical solutions of the present application will be described clearly and completely below in conjunction with the drawings. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0029] The embodiment provides a thin seam inner rocker arm type coal mining machine, which comprises a coal mining machine body 1, a driving device, a transmission device, a rocker arm 401, a rocker arm driving part, a cutting drum and a support sliding shoe assembly.

[0030] The coal mining machine body 1 is the body of the whole coal mining machine, and a coal passing window 101 is arranged along a central axis line.

[0031] The driving device is installed in the coal mining machine body 1 and located at a mined-out side (A side) of the coal mining machine body 1.

[0032] The two groups of rocker arms 401 are vertically rotatably installed on the coal mining machine body 1 and symmetrically arranged at two sides of the coal passing window 101.

[0033] The rocker arm 401 is driven to rotate by the rocker arm driving part.

[0034] The cutting drum is rotatably mounted on the rocker arm 401 at the coal wall side (B side) of the shearer body 1, and the rotation axis of the cutting drum is parallel to but not coincident with the rotation axis of the rocker arm 401. The rocker arm cylinder 5 is extended and retracted to rotate the rocker arm 401 and the cutting drum thereon around the rotation axis of the rocker arm 401, so as to adjust the height of the cutting drum. The cutting drum comprises a cylindrical structure 601, an arc-shaped end face 602 and cutting teeth 603. The arc-shaped end face 602 is arranged at the second end of the cylindrical structure 601 and protrudes outward. The cutting teeth 603 are distributed on the cylindrical structure 601 and the arc-shaped end face 602 according to a spiral line.

[0035] The two sets of transmission devices are symmetrically arranged at two sides of the central axis of the shearer body 1, located in the shearer body 1, the rocker arm 401 and the cutting drum, and transmit the power provided by the driving device to the cutting drum.

[0036] The two sets of transmission devices are symmetrically arranged and have the same structure, and each includes a torque shaft 301, a bevel gear I 302, a bearing I 303, a bevel gear II 304, a bearing II 305, a transmission shaft 306, a rotating sealing cover 307, a bearing III, a bearing end cover 309, a primary gear 310, a secondary gear 311, a secondary gear shaft 312, a tertiary gear, a tertiary gear shaft, a bearing IV 314, a spline gear 315, and a planetary reducer; the torque shaft 301 is transversely arranged in the shearer body 1 through the bearing I 303, the outer spline at the first end is connected with the inner spline of the output shaft of the double-output motor 2, and the outer spline at the second end is connected with the inner spline of the bevel gear I 302; the transmission shaft 306 is vertically arranged in the shearer body 1 and the rocker arm 401 and is rotatably connected with the shearer body 1 and the rocker arm 401, respectively, the outer spline at the first end is connected with the inner spline of the bevel gear II 304, and the outer spline at the second end is connected with the inner spline of the primary gear 310; the bevel gear II 304 and the bevel gear I 302 are vertically engaged, the bevel gear II 304 is rotatably supported by the bearing II 305 installed in the shearer body 1, and the transmission direction after the bevel gear II 304 is changed to the direction of the coal wall side; the primary gear 310 is provided with a bearing IIIa 3081 and a bearing IIIb 3082 on both sides to connect the rocker arm 401; the rotating sealing cover 307 is installed on the outer side of the bearing IIIa 3081 to limit the axial position, and the rotating sealing cover 307 ensures that the rocker arm 401 does not leak oil when rotating relative to the shearer body 1; the bearing end cover 309 is installed on the outer side of the bearing IIIb 3082 to limit the axial position; the secondary gear shaft 312 is fixedly installed in the rocker arm 401 and is parallel to the transmission shaft 306; the secondary gear 311 is an idler gear and is rotatably installed on the secondary gear shaft 312 through a bearing V and is engaged with the primary gear 310; the tertiary gear shaft is rotatably installed in the rocker arm 401 through the bearing IV 314 and is parallel to the secondary gear shaft 312; the tertiary gear is fixedly installed on the tertiary gear shaft and is engaged with the secondary gear 311; the input end of the spline gear 315 is connected with the tertiary gear shaft, and the output end is connected with the input end of the planetary reducer; the planetary reducer is arranged in the rocker arm 401 and the cutting drum, the output end is connected with the cylindrical structure 601, and the planetary reducer drives the cutting drum to rotate.

[0037] Both the bearings III are single-row roller bearings.

[0038] The planetary reducer is a two-stage planetary reducer 316, which plays a role of speed reduction and torque increase, and the shell is fixedly connected with the rocker arm 401.

[0039] The working process of the transmission device is as follows:

[0040] The double-output motor 2 can output torque in opposite directions to two ends with the same rotating speed, and the transmission of the output torque of the double-output motor 2 to the coal wall side direction is realized through the torque shaft 301, the bevel gear I 302 and the bevel gear II 304, the transmission of the output torque to the inside (the center direction of the double-output motor 2) is realized through the primary gear 310, the secondary gear 311 and the tertiary gear, and the transmission of the output torque to the coal wall side is realized through the spline gear 315 and the planetary reducer.

[0041] When the rocker arm 401 rotates, the primary gear 310 does not rotate, the secondary gear 311 rotates around the primary gear 310, the inner ring of the bearing III is fixed, and the outer ring rotates around the transmission shaft 306 with the rocker arm 401. When the rocker arm 401 does not rotate, the outer ring of the bearing III is fixed, and the inner ring rotates with the transmission shaft 306.

[0042] The bottom of the shearer body 1 is also provided with slide shoe assemblies, namely a left front slide shoe assembly 701, a left rear slide shoe assembly 702, a right front slide shoe assembly 703 and a right rear slide shoe assembly 704, which support the shearer and enable the shearer to move relative to the scraper conveyor.

[0043] The arrangement mode of the transversely arranged double-output motor 2 and the transmission device makes it possible to reduce the length of the shearer, and the minimum center distance of the cutting drum is about 1.7 m, which makes it possible to realize the inner rocking of the shearer, and breaks through the rocking mode of the traditional outer rocker arm shearer.

[0044] The shearer and other sheavers have the same working principle, that is, they rely on the driving of the machine head and tail of the coal mining face to cut coal back and forth, and the difference is that the shearer can vertically top into the coal wall by moving the support forward at both ends of the coal mining face due to the short length of the whole machine, and the arc-shaped end surface 602 at the end of the cutting drum is also designed based on this, which improves the speed of opening the cut hole. The thin coal seam inner rocker arm shearer can be pulled into the two end roadways for maintenance due to its small size, which is convenient for workers to maintain.

[0045] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A rocker arm type coal mining machine for thin coal seams, characterized in that, This includes the coal mining machine body, drive unit, transmission unit, rocker arm, rocker arm drive unit, and cutting drum; The coal mining machine has coal passage windows arranged along its central axis. The drive unit is installed inside the coal mining machine body and located on the goaf side of the coal mining machine body. The drive unit is a horizontally arranged dual-output motor. The dual-output motor outputs torque at the same speed but in opposite directions to both ends; Two sets of rocker arms are vertically mounted on the body of the coal mining machine and symmetrically arranged on both sides of the coal passage window. They are driven to rotate by the rocker arm drive unit. The cutting drum is rotatably mounted on the rocker arm and located on the coal wall side of the coal mining machine body. The rotation axis of the cutting drum is parallel to and does not coincide with the rotation axis of the rocker arm. Two sets of transmission devices are symmetrically arranged on both sides of the central axis of the coal mining machine body, located inside the coal mining machine body, rocker arm and cutting drum, to transmit the power provided by the drive device to the cutting drum; The two sets of transmission devices have the same structure and are arranged symmetrically. Each includes a torque shaft, bevel gear I, bevel gear II, bearing II, transmission shaft, bearing III, first-stage gear, second-stage gear, second-stage gear shaft, third-stage gear, third-stage gear shaft, bearing IV, spline gear, and planetary reducer. The torque shaft is arranged laterally within the coal mining machine body via bearing I. The external spline at the first end is connected to the internal spline of the output shaft of the dual-output motor, and the external spline at the second end is connected to the internal spline of bevel gear I. The drive shaft is vertically arranged inside the coal mining machine body and rocker arm, and is rotatably connected to the coal mining machine body and rocker arm respectively. The external spline at the first end is connected to the internal spline of bevel gear II, and the external spline at the second end is connected to the internal spline of the first stage gear. The bevel gear II and bevel gear I mesh perpendicularly, and bevel gear II is supported and rotated by bearing II installed in the body of the coal mining machine. Bearings IIIa and IIIb are provided on both sides of the primary gear to connect the rocker arm; The secondary gear shaft is fixedly installed inside the rocker arm and is parallel to the drive shaft; The secondary gear is an idler gear, which is rotatably mounted on the secondary gear shaft via bearing V and meshes with the primary gear; The third-stage gear shaft is rotatably mounted in the rocker arm via bearing IV and is parallel to the second-stage gear shaft; The third-stage gear is fixedly mounted on the third-stage gear shaft and meshes with the second-stage gear. The input end of the spline gear is connected to the third-stage gear shaft, and the output end is connected to the input end of the planetary reducer. The planetary reducer is arranged inside the rocker arm and the cutting drum, and its output end is connected to the cylindrical structure of the cutting drum to drive the cutting drum to rotate.

2. The rocker arm coal mining machine in a thin coal seam according to claim 1, characterized in that, A rotating sealing cover is installed on the outer side of the bearing Ⅲa; A bearing end cap is installed on the outer side of the bearing Ⅲb; Both bearings III are single-row roller bearings.

3. The rocker arm coal mining machine in a thin coal seam according to claim 1, characterized in that, The planetary reducer is a two-stage planetary reducer.

4. The rocker arm coal mining machine for thin coal seams according to any one of claims 1-3, characterized in that, The rocker arm is connected to the coal mining machine body via a rotating sleeve; The inner wall of the rotating sleeve is fixed to the body of the coal mining machine, while the outer wall is rotatably connected to the rocker arm.

5. The rocker arm coal mining machine for thin coal seams according to any one of claims 1-3, characterized in that, The rocker arm drive unit is a rocker arm cylinder, with both ends connected to the coal mining machine body and the rocker arm respectively through cylinder lugs.

6. The rocker arm coal mining machine for thin coal seams according to any one of claims 1-3, characterized in that, The cutting drum includes a cylindrical structure, an arc-shaped end face, and cutting teeth; The planetary reducer passes through the first end of the cylindrical structure, and its output end is fixedly connected to the cylindrical structure. The arc-shaped end face is located at the second end of the cylindrical structure and protrudes outward; The cutting teeth are distributed on the outside of the cylindrical structure and the arc-shaped end face.

7. The rocker arm coal mining machine for thin coal seams according to any one of claims 1-3, characterized in that, The bottom of the coal mining machine is also equipped with a slipper assembly.

Images