CN112628361A

CN112628361A - Coal mine tunneling equipment

Info

Publication number: CN112628361A
Application number: CN202011538676.8A
Authority: CN
Inventors: 张强; 马凯; 张学瑞; 任晓力; 吴恒建; 马福文; 胡蕾; 黄振华; 王宁宁; 邢晨; 雷瑞杰; 侯伟; 李红梅; 王以超; 贾建伟
Original assignee: Taiyuan Institute of China Coal Technology and Engineering Group; Shanxi Tiandi Coal Mining Machinery Co Ltd
Current assignee: Taiyuan Institute of China Coal Technology and Engineering Group; Shanxi Tiandi Coal Mining Machinery Co Ltd
Priority date: 2020-12-23
Filing date: 2020-12-23
Publication date: 2021-04-09
Anticipated expiration: 2040-12-23
Also published as: CN112628361B

Abstract

The invention relates to the technical field of coal mine tunneling equipment, in particular to coal mine tunneling equipment. The coal mine tunneling equipment comprises a rack and a speed reducing device, wherein the speed reducing device comprises a box body, a first-stage planetary speed reducing mechanism and a second-stage planetary speed reducing mechanism, the first-stage planetary speed reducing mechanism and the second-stage planetary speed reducing mechanism are arranged in the box body, and the box body is movably arranged on the rack to adjust the position of the speed reducing device on the rack. The speed reducer of the coal mine tunneling equipment has the advantages of small overall dimension, good heat dissipation effect, convenience in maintenance and the like.

Description

Coal mine tunneling equipment

Technical Field

The invention relates to the technical field of coal mine tunneling equipment, in particular to coal mine tunneling equipment.

Background

In recent years, the fully mechanized coal mining work is rapidly developed towards large mining height and super large mining height, for example, the mining height is developed to 7 meters or even 8 meters. The increase of the number of the fully mechanized coal mining faces with large mining height raises the requirements on the tunneling equipment, for example, the requirements on the size, the tunneling speed, the maintenance convenience and the like of the equipment are raised, and the speed reducer of the coal mine tunneling equipment in the related technology has the problems of difficult maintenance, large overall dimension, poor heat dissipation effect and the like.

Disclosure of Invention

The present invention is directed to solving, at least to some extent, one of the technical problems in the related art.

Therefore, the embodiment of the invention provides coal mine tunneling equipment convenient to maintain.

The coal mine tunneling equipment comprises a frame;

the speed reducer comprises a box body, a primary planetary speed reducing mechanism and a secondary planetary speed reducing mechanism, the primary planetary speed reducing mechanism and the secondary planetary speed reducing mechanism are arranged in the box body, and the box body is movably arranged on the rack to adjust the position of the speed reducer on the rack.

The speed reducer of the coal mine tunneling equipment has the advantages of small overall dimension, good heat dissipation effect, convenience in maintenance and the like.

In some embodiments, the case is provided with a first guide rail and a second guide rail spaced apart from each other, and the case is provided with a first slider and a second slider, the first slider being slidably fitted on the first guide rail, and the second slider being slidably fitted on the second guide rail.

In some embodiments, one of the box and the frame is provided with a male spigot and the other is provided with a female spigot for cooperating with the male spigot to locate the reduction gear.

In some embodiments, the coal mine excavation equipment further comprises a motor, the motor is arranged in the box body, and a motor shaft of the motor is connected with the primary planetary speed reduction mechanism.

In some embodiments, the primary planetary reduction mechanism comprises a primary input shaft, a primary sun gear, a primary ring gear, a plurality of primary planet gears, a primary planet carrier and a primary output shaft, the primary planet gears are mounted on the primary planet carrier through the primary planet shaft, the primary planet gears are meshed with the primary sun gear and the primary ring gear, the primary output shaft is connected with the primary planet carrier, a primary output gear is arranged on the primary output shaft, and the primary output gear is engaged with the secondary planetary reduction mechanism to transmit power to the secondary planetary reduction mechanism.

In some embodiments, the secondary planetary reduction mechanism comprises a secondary input shaft, a secondary sun gear, a secondary ring gear, a plurality of secondary planet gears, a secondary planet carrier and a secondary output shaft, the secondary planet gears are mounted on the secondary planet carrier through the secondary planet shaft, the secondary planet gears are meshed with the secondary sun gear and the secondary ring gear, the secondary output shaft is connected with the secondary planet carrier, a secondary input gear is arranged on the secondary input shaft, and the secondary input gear is meshed with the primary output gear so that the secondary planetary reduction mechanism is connected with the primary output gear.

In some embodiments, the coal mine excavation apparatus further comprises a first idler gear mounted within the box by a first idler shaft, the primary output gear being in mesh with the secondary input gear by the first idler gear, a second idler gear mounted within the box by a second idler shaft and in mesh with the first idler gear, and a brake for braking the second idler shaft.

In some embodiments, the secondary input gear is mounted to a first end of the secondary input shaft, the secondary sun gear is mounted to a second end of the secondary input shaft, the secondary output shaft is a hollow shaft, the secondary input shaft passes through the secondary output shaft, the first end of the secondary input shaft extends from the first end of the secondary output shaft, and the second end of the secondary input shaft extends from the second end of the secondary output shaft.

In some embodiments, the secondary planet carrier has a hollow mating shaft keyed within the second end of the secondary output shaft, and the second end of the secondary input shaft extends from the mating shaft.

In some embodiments, the primary input shaft is collinear with an axis of the primary output shaft, and the secondary input shaft is collinear with and parallel to an axis of the secondary output shaft.

Drawings

Fig. 1 is a front view of a reduction gear unit of a coal mine tunnelling apparatus in accordance with an embodiment of the present invention.

Fig. 2 is a view from a-a of fig. 1.

Fig. 3 is an enlarged view at B in fig. 2.

Fig. 4 is an enlarged view at C in fig. 2.

Fig. 5 is an enlarged view at D in fig. 2.

Fig. 6 is a top view of fig. 1.

Fig. 7 is a rear view of fig. 1.

Reference numerals: a reduction device 100; a motor 1; a motor shaft 101; a junction box 102; a motor connecting bolt 103; a box body 2; a first slider 201; a second slider 202; a male end 203; a second annular ledge 204; a stop surface 205; a primary planetary reduction mechanism 3; a primary input shaft 300; a primary sun gear 301; a primary ring gear 302; a primary planet gear 303; a primary planet carrier 304; a first annular stop 3041; a primary planet shaft 305; a first shoulder 3051; a second shoulder 3052; a primary planet bearing 306; primary planet connecting bolts 307; primary planetary bond 309; a primary planet end cap 310; a primary planet end cover connecting bolt 311; a first distance sleeve 312; a second distance sleeve 313; a primary output shaft 314; a first shoulder 3141; a second shoulder 3142; a primary output bearing 315; a primary output gear 316; primary output gear end cap 317; a primary output gear end cover connecting bolt 318; a first idler pulley 4; a first idler bearing 401; a first idler shaft 402; a first idler end cap 403; a first idler end cap attachment bolt 404; a secondary planetary reduction mechanism 5; a secondary input shaft 501; first end 5011; second end 5012; a secondary ring gear 502; a secondary planet wheel 503; a secondary planet carrier 504; an inner flange 5041; a mating shaft 5042; a secondary planet shaft 505; a shaft shoulder 5051; a secondary planet bearing 506; secondary planet connecting bolts 507; a secondary planet end cover 508; secondary planet end cap connecting bolts 509; a secondary input gear 511; a first stop face 5111; a second stop face 5112; a secondary input bearing 512; secondary input gear end cover 513; secondary input gear end cap connecting bolts 514; a secondary output shaft 515; a first end 5151; a second end 5152; a first bearing sleeve 516; a first bearing housing connecting bolt 517; a sprocket 6; a sprocket bearing 601; a second idler end cover 7; a second idler end cap attachment bolt 701; third idler end cover 8; the third idler end cap attachment bolt 801.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.

As shown in fig. 1 to 7, the coal mine excavation equipment according to the embodiment of the present invention includes a frame and a reduction gear 100, the reduction gear 100 includes a casing 2, a primary planetary reduction mechanism 3 and a secondary planetary reduction mechanism 5, the primary planetary reduction mechanism 3 and the secondary planetary reduction mechanism 5 are provided in the casing 2, and the casing 2 is movably mounted on the frame to adjust the position of the reduction gear 100 on the frame.

The speed reducer 100 of the coal mine tunneling equipment in the related art comprises a high-speed stage box body, an idler stage box body, a low-speed stage box body and a plurality of gears, wherein the gears are divided into three stages of gears, the three stages of gears are respectively a high-speed stage gear, an idler stage gear and a low-speed stage gear, the high-speed stage gear is arranged in the high-speed stage box body, the idler stage gear is arranged in the idler stage box body, and the low-speed stage box body is arranged in the low-speed stage box body. The high-speed-stage box body, the idler-stage box body and the low-speed-stage box body are three independent box bodies, so that the high-speed-stage gear, the idler-stage gear and the low-speed-stage gear of the gear are mainly radiated by the corresponding box bodies, and the whole radiating effect of the speed reducer is poor. Moreover, most of the gears of the speed reducing device are external gears, even all of the gears are external gears, only the meshing parts of the two meshed external gears share the same space, and other parts respectively occupy independent spaces, so that the overall external dimension of the speed reducing device is large. In addition, the speed reducer is fixed on a rack of the coal mine tunneling equipment, and the speed reducer is difficult to take out of the rack due to the large mass of the speed reducer, so that maintenance personnel can only stretch into the speed reducer from a narrow space between the rack and the speed reducer to maintain the speed reducer, and the maintenance operation is inconvenient.

According to the speed reducing device 100 of the coal mine tunneling equipment, the first-stage planetary speed reducing mechanism 3 and the second-stage planetary speed reducing mechanism 5 which are compact in structure are used, and compared with the prior art that the number of gears of the speed reducing device is mostly external gears, even all the gears are external gears, the external dimension of the speed reducing device 100 can be effectively reduced, and therefore the power-volume ratio of the speed reducing device 100 can be increased. One-level planetary reduction mechanism 3 and second grade planetary reduction mechanism 5 all set up in same box 2, and planetary reduction mechanism at different levels not only can be through the heat dissipation of box 2, can also carry out heat exchange and make each planetary reduction mechanism's heat not too high with adjacent planetary reduction mechanism, this with tertiary gear set up respectively in the three independent box prior art compare, do benefit to decelerator 100's whole heat dissipation to decelerator 100's high temperature trouble in the use can be reduced. In addition, since the casing 2 of the reduction gear transmission 100 is movably mounted on the rack, the position of the reduction gear transmission 100 on the rack can be adjusted by moving the casing 2, and thus, the reduction gear transmission 100 can be conveniently maintained by a maintenance worker.

Therefore, the coal mine tunneling equipment provided by the embodiment of the invention has the advantages of small overall dimension of the speed reducing device 100, good heat dissipation effect, convenience in maintenance and the like.

The coal mine tunneling equipment can be a tunneling and anchoring machine, a continuous miner and the like.

As shown in fig. 1, 6 and 7, the case 2 is provided with a first guide rail and a second guide rail spaced apart from each other, the case 2 is provided with a first slider 201 and a second slider 202, the first slider 201 is slidably fitted on the first guide rail, and the second slider 202 is slidably fitted on the second guide rail. Therefore, when the maintenance device needs to be maintained, the position of the speed reducing device 100 on the rack can be adjusted by sliding the first sliding block 201 along the first guide rail and sliding the second sliding block 202 along the second guide rail, so that the position of the speed reducing device 100 on the rack is convenient to adjust, and maintenance personnel can further perform maintenance operation on the speed reducing device 100 conveniently.

In some embodiments, one of the case 2 and the frame is provided with a male spigot 203, and the other is provided with a female spigot for cooperating with the male spigot 203 to position the reduction gear unit 100. Therefore, when the speed reducer 100 is installed on the rack, the speed reducer 100 can be conveniently positioned on the set position of the rack by utilizing the matching of the male spigot 203 and the female spigot, and a maintainer or an installer can conveniently install the speed reducer 100 on the set position of the rack.

For example, as shown in fig. 6, a male notch 203 is provided on the case 2, and a female notch is provided on the frame. Of course, the female seam allowance may be provided in the case 2 and the male seam allowance 203 may be provided in the frame.

As shown in fig. 1-6, the coal mine tunneling device further comprises a motor 1, the motor 1 is arranged in the box body 2, and a motor shaft 101 of the motor 1 is connected with the primary planetary speed reducing mechanism 3. Therefore, the motor 1 is integrated on the speed reducer 100, so that the whole volume of the coal mine tunneling equipment is favorably reduced, and the power-volume ratio of the coal mine tunneling equipment is favorably improved.

Preferably, as shown in fig. 1, the motor 1 is mounted on the case 2 by a motor connecting bolt 3. As shown in fig. 2, the motor 1 includes a terminal block 102, and the terminal block 102 is used for wiring of the motor 1.

As shown in fig. 2 and 3, the primary planetary reduction mechanism 3 includes a primary input shaft 300, a primary sun gear 301 mounted on the primary input shaft 300, a primary ring gear 302, a plurality of primary planet gears 303, a primary planet carrier 304, and a primary output shaft 314, the primary planet gears 303 are mounted on the primary planet carrier 304 through a primary planet shaft 305, the primary planet gears 303 are engaged with the primary sun gear 301 and the primary ring gear 302, the primary output shaft 314 is connected with the primary planet carrier 304, the primary output shaft 314 is provided with a primary output gear 316, and the primary output gear 316 is engaged with the secondary planetary reduction mechanism 5 to transmit power to the secondary planetary reduction mechanism 5. Therefore, the layout of the first-stage planetary reduction mechanism 3 is more reasonable, the first-stage planetary reduction mechanism 3 is conveniently installed in the box body 2, and the overall dimension of the reduction device 100 is further reduced.

Preferably, as shown in fig. 2 and 3, the primary sun gear 301 of the primary planetary reduction mechanism 3 is mounted on the motor shaft 101 of the motor 1, thereby realizing that the motor shaft 101 of the motor 1 is connected with the primary planetary reduction mechanism 3, and the motor shaft 101 of the motor 1 constitutes the primary input shaft 300. The primary planet wheels 303 are mounted on a primary planet shaft 305 by means of primary planet connection keys 309, and the primary planet shaft 305 is mounted in the housing 2 by means of two primary planet bearings 306. The primary annular gear 302 is fixed in the case 2 by a primary planet connecting bolt 307. The primary output shaft 314 is keyed to the primary planet carrier 304, and connects the primary output shaft 314 to the primary planet carrier 304. The primary output shaft 314 is mounted within the housing 2 by means of two primary output bearings 305.

Specifically, as shown in fig. 2 and fig. 3, a first shoulder 3051 and a second shoulder 3052 are disposed on the first-stage planetary shaft 305, a first annular stop 3041 and a first-stage planetary end cap 310 are disposed on the first-stage planetary carrier 304, two ends of one of the first-stage planetary bearings 306 are respectively in stop fit with the first shoulder 3051 and the first annular stop 3041, two ends of the other of the first-stage planetary bearings 306 are respectively in stop fit with the second shoulder 3052 and the first-stage planetary end cap 310, and the first-stage planetary end cap 310 is connected to the box body 2 through a first-stage planetary end cap connecting bolt 311, so that the first-stage planetary shaft 305 is installed in the box body 2.

As shown in fig. 2 and 3, a first shoulder 3141 and a second shoulder 3142 are disposed on the first-stage output shaft 314, a second annular stop 204 and a first-stage output gear end cap 317 are disposed on the case 2, two ends of one first-stage output bearing 305 are respectively in stop fit with the first shoulder 3141 and the second annular stop 204, two ends of the other first-stage output bearing 305 are respectively in stop fit with the second shoulder 3142 and the first-stage output gear end cap 317, and the first-stage output gear end cap 317 is connected to the case 2 through a first-stage output gear end cap connecting bolt 318, so that the first-stage output shaft 314 is installed in the case 2.

Preferably, as shown in fig. 2, the primary output shaft 314 is integrally formed with the primary output gear 316 to form a gear shaft.

As shown in fig. 2 and 3, in some embodiments, the primary input shaft 300 is collinear with the axis of the primary output shaft 314. For example, a first distance sleeve 312 and a second distance sleeve 313 are provided between the primary input shaft 300 and the primary output shaft 314 so that the axes of the primary input shaft 300 and the primary output shaft 314 are collinear using the first distance sleeve 312 and the second distance sleeve 313.

As shown in fig. 2 and 4, the secondary planetary reduction mechanism 5 includes a secondary input shaft 501, a secondary sun gear mounted on the secondary input shaft 501, a secondary ring gear 502, a plurality of secondary planet gears 503, a secondary planet carrier 504, and a secondary output shaft 515, the secondary planet gears 503 are mounted on the secondary planet carrier 504 through a secondary planet shaft 505, the secondary planet gears 503 are engaged with the secondary sun gear and the secondary ring gear 502, the secondary output shaft 515 is connected with the secondary planet carrier 504, a secondary input gear 511 is provided on the secondary input shaft 501, and the secondary input gear 511 is engaged with the primary output gear 316 so that the secondary planetary reduction mechanism 5 is engaged with the primary output gear 316. Therefore, the layout of the secondary planetary reduction mechanism 5 is more reasonable, the secondary planetary reduction mechanism 5 is conveniently installed in the box body 2, and the overall dimension of the reduction device 100 is further reduced.

For example, as shown in fig. 2 and 4, a secondary planet shaft 505 is mounted in the case 2 using two secondary planet bearings 506. The secondary annular gear 502 is fixed in the case 2 by a secondary planet connecting bolt 507. The secondary output shaft 515 is keyed to the secondary planet carrier 504, connecting the secondary output shaft 515 to the secondary planet carrier 504. A secondary input gear 511 is provided on the secondary input shaft 501 and is mounted in the case 2 by two secondary input bearings 512.

Specifically, as shown in fig. 2 and 4, an inner flange 5041 is arranged on the secondary planet carrier 504, a shaft shoulder 5051 and a secondary planet end cover 508 are arranged on the secondary planet shaft 505, two ends of one secondary planet bearing 506 are respectively in blocking fit with the inner flange 5041 and the shaft shoulder 5051, two ends of the other secondary planet bearing 506 are respectively in blocking fit with the inner flange 5041 and the secondary planet end cover 508, and the inner flange 5041 separates the two secondary planet bearings 506. The secondary planet end cap 508 is attached to the case 2 by secondary planet end cap attachment bolts 509 to mount the secondary planet shaft 505 within the case 2.

As shown in fig. 2 and 5, the secondary input gear 511 is provided with a first stop surface 5111 and a second stop surface 5112, the case 2 is provided with a first bearing sleeve 516 and a secondary input gear end cover 513, two ends of one secondary input bearing 512 are respectively in stop fit with the first stop surface 5111 and the first bearing sleeve 516, and two ends of the other secondary input bearing 512 are respectively in stop fit with the second stop surface 5112 and the secondary input gear end cover 513. The first bearing housing 516 is coupled to the housing 2 by a first bearing housing coupling bolt 517, and the secondary input gear cover 513 is coupled to the housing 2 by a secondary input gear cover coupling bolt 514 to mount the secondary input gear 511 in the housing 2.

As shown in fig. 2 and 3, in some embodiments, the secondary input shaft 501 is collinear with the axis of the secondary output shaft 515 and parallel to the axis of the primary output shaft 314. This further contributes to a reduction in the outer dimensions of the reduction gear transmission 100, and thus to a further increase in the power-to-volume ratio of the reduction gear transmission 100.

As shown in fig. 2 and 5, in some embodiments the coal mine tunnelling apparatus further comprises a first idler gear 4, the first idler gear 4 being mounted within the casing 2 by a first idler shaft 402, the primary output gear 316 being in mesh with the secondary input gear 511 by the first idler gear 4, and a second idler gear mounted within the casing 2 by a second idler shaft and in mesh with the first idler gear 4, and a brake for braking the second idler shaft.

For example, the case 2 is provided with a stop surface 205 and a first idler end cover 403, and two ends of the first idler shaft 402 are respectively matched with the stop surface 205 and the first idler end cover 403 in a stop manner, so as to realize the positioning of the first idler shaft 402 in the case 2. The first idler 4 is mounted on a first idler shaft 402 with two first idler bearings 401.

Preferably, as shown in fig. 6 and 7, a second idler cover 7 and a third idler cover 8 are provided on the case 2, the second idler cover 7 is fixed on the case 2 by a second idler cover connecting bolt 701, and the third idler cover 8 is fixed on the case 2 by a third idler cover connecting bolt 801. When the brake is installed, the third idler end cover 8 is detached, and the brake is installed at the position.

As shown in FIG. 2, in some embodiments, the secondary input gear 511 is mounted at a first end 5011 of the secondary input shaft 501, the secondary sun gear is mounted at a second end 5012 of the secondary input shaft 501, the secondary output shaft 515 is a hollow shaft, the secondary input shaft 501 passes through the secondary output shaft 515, the first end 5011 of the secondary input shaft 501 extends from a first end 5151 of the secondary output shaft 515, and the second end 5012 of the secondary input shaft 501 extends from a second end 5052 of the secondary output shaft 515. Therefore, the structure of the two-stage planetary reduction mechanism 5 is further made more compact, which is beneficial to further reducing the external dimension of the reduction gear 100 and improving the power-volume ratio of the reduction gear 100.

As shown in fig. 2 and 4, in some embodiments, the secondary planet carrier 504 has a hollow mating shaft 5042, the mating shaft 5042 is keyed into the second end 5152 of the secondary output shaft 515, and the second end 5152 of the secondary input shaft 501 extends from the mating shaft 5042. Therefore, the structure of the two-stage planetary reduction mechanism 5 is further made more compact, which is beneficial to further reducing the external dimension of the reduction gear 100 and improving the power-volume ratio of the reduction gear 100.

For example, a chain wheel 6 is arranged on the secondary output shaft 515, so that the chain wheel 6 is driven to rotate through the secondary output shaft 515, and then a track or a roller of the coal mine tunneling equipment is driven to run. Preferably, the sprocket 6 and the secondary output shaft 515 are integrally formed, and the sprocket 6 is installed in the case 2 through a sprocket bearing 601.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

In the present disclosure, the terms "one embodiment," "some embodiments," "an example," "a specific example," or "some examples" and the like mean that a specific feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present disclosure. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.

Claims

1. A coal mine tunnelling apparatus, comprising:

a frame;

2. A coal mine excavation apparatus as claimed in claim 1, wherein the casing is provided with first and second spaced apart rails, the casing being provided with first and second slides, the first slide being slidably engaged on the first rail and the second slide being slidably engaged on the second rail.

3. A coal mine tunnelling apparatus as claimed in claim 2, wherein one of the casing and the chassis is provided with a male spigot and the other is provided with a female spigot for cooperating with the male spigot to locate the reduction means.

4. A coal mine excavation apparatus as claimed in claim 1, further comprising a motor disposed within the box, a motor shaft of the motor being connected to the primary planetary reduction mechanism.

5. A coal mine excavation device as claimed in any of claims 1 to 4, wherein the primary planetary reduction mechanism comprises a primary input shaft, a primary sun gear, a primary annulus gear, a plurality of primary planet gears, a primary planet carrier and a primary output shaft mounted on the primary input shaft, the primary planet gears are mounted on the primary planet carrier via a primary planet shaft, the primary planet gears are engaged with the primary sun gear and the primary annulus gear, the primary output shaft is connected with the primary planet carrier, a primary output gear is provided on the primary output shaft, and the primary output gear is engaged with the secondary planetary reduction mechanism to transmit power to the secondary planetary reduction mechanism.

6. A coal mine excavation device as claimed in claim 5, wherein the secondary planetary reduction mechanism comprises a secondary input shaft, a secondary sun gear mounted on the secondary input shaft, a secondary annulus gear, a plurality of secondary planet gears, a secondary planet carrier and a secondary output shaft, the secondary planet gears are mounted on the secondary planet carrier through the secondary planet shaft, the secondary planet gears are meshed with the secondary sun gear and the secondary annulus gear, the secondary output shaft is connected with the secondary planet carrier, a secondary input gear is arranged on the secondary input shaft, and the secondary input gear is meshed with the primary output gear so that the secondary planetary reduction mechanism is connected with the primary output gear.

7. A coal mine excavation apparatus according to claim 6, further comprising a first idler gear mounted within the box by a first idler shaft, the primary output gear being in mesh with the secondary input gear by the first idler gear, a second idler gear mounted within the box by a second idler shaft and in mesh with the first idler gear, and a brake for braking the second idler shaft.

8. A coal mine excavation apparatus as claimed in claim 6, wherein the secondary input gear is mounted at a first end of the secondary input shaft, the secondary sun gear is mounted at a second end of the secondary input shaft, the secondary output shaft is a hollow shaft, the secondary input shaft passes through the secondary output shaft, the first end of the secondary input shaft extends from the first end of the secondary output shaft, and the second end of the secondary input shaft extends from the second end of the secondary output shaft.

9. A coal mine excavation apparatus as claimed in claim 8, wherein the secondary planet carrier has a hollow mating shaft keyed within the second end of the secondary output shaft, the second end of the secondary input shaft projecting from the mating shaft.

10. A coal mine excavation apparatus as claimed in claim 8, wherein the primary input shaft is co-linear with the axis of the primary output shaft and the secondary input shaft is co-linear with and parallel to the axis of the secondary output shaft.