CN212535652U - Thin coal seam coal mining machine - Google Patents

Abstract

The utility model relates to a thin coal seam coal-winning machine, including cutting system and traction system, cutting system includes non-swing drive portion and no motor rocking arm, non-swing drive portion is including casing and the preceding stage transmission system of stewing, no motor rocking arm includes rocking arm casing and back stage transmission system, install the cut motor in the casing of stewing, the root rotation of rocking arm casing supports in the casing of stewing, cut motor output shaft links up through preceding stage transmission system and back stage transmission system, traction system is including pulling the casing, it is L shape to pull the casing, it extends the section and controls the extension section around being divided into to pull the casing, traction motor and high-speed section reduction gears arrange in the front and back extension section, interlude reduction gears arranges in controlling the extension section, laminating and fixed connection about extension section and the casing of stewing. The utility model discloses can realize short fuselage and high-power simultaneously, have fine adaptability and reliability in the high working face exploitation of exploitation height, coal petrography hardness height.

Description

Thin coal seam coal mining machine

Technical Field

The utility model relates to a thin coal seam coal mining machine is particularly useful for the exploitation of the thin or extremely thin coal seam of the working face of the complicated condition such as the high, high coal petrography hardness of exploitation height.

Background

For mining of thin or extremely thin coal seams, the mining height is often low (some mining heights meet the requirement of 0.8m), the geological conditions are complex (such as coexistence of coal and rock and high hardness), and the like, so in order to improve the adaptability and reliability of the coal mining machine, the thin coal seam coal mining machine is generally required to have a shorter and shorter machine body, and the installed power is higher and higher. However, as power increases, the size of the motor, the transmission system and the like generally increases correspondingly, which is in conflict with the achievement of lower machine surface height. The structural arrangement of thin or ultra-thin seam shearers is therefore a major and difficult point in the structural design of such shearers.

When a thin coal seam is mined, the space of a coal mining face is usually narrow, if the overall dimension of the coal mining machine is too large, the peripheral space of the coal mining machine is compressed, for example, the machine clearance is passed and the coal passing height is reduced, and the passing and loading of the coal mining machine can be seriously influenced, so that the problem of difficult structural arrangement of the coal mining machine for the thin or extremely thin coal seam is more prominent due to the increase of the installed power.

The technical proposal that large and medium-sized parts such as motors, transmission gears and the like are moved forwards from the upper part of the original scraper conveyor to the side close to the coal wall is proposed and gradually used in the industry, namely, the arrangement problem of the large and medium-sized parts is solved by adopting a mode of suspending a machine body. Although the method can improve the structural arrangement problem to a certain extent, such as the increase of the machine clearance, the method also brings other outstanding problems, including the partial higher structure of the coal mining machine on the side close to the coal wall; the span distance between the left roller and the right roller is large; the drum has poor adaptability to mining height, for example, large and medium-sized parts such as a cutting motor of a cutting system need to swing upwards along with a rocker arm, and particularly under the condition of a rear drum top mining cutter, because a rocker arm shell is easily scratched and interfered with an upper coal platform, the up-regulation amount of the rear drum is greatly reduced, higher coal cannot be further mined, or even if the theoretical top regulation amount is large, the mining requirement of a coal bed in a wider mining height range cannot be really met; the space above the scraper conveyor for passing coal is small, which causes poor adaptability of the coal mining machine to the fluctuating working surface and the like.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a thin coal seam coal-winning machine can also obtain great dress machine power when realizing short fuselage to fine adaptability and reliability have in the exploitation of the complicated working face of condition such as high, the coal petrography hardness of exploitation height.

The utility model discloses a main technical scheme has:

a thin seam coal mining machine comprises a cutting system and a traction system, wherein the cutting system comprises a non-swing transmission part, a motor-free rocker arm, a cutting motor and an oil cylinder, the non-swing transmission part comprises a standing shell and a front-stage transmission system arranged in the standing shell, the motor-free rocker arm comprises a rocker arm shell and a rear-stage transmission system arranged in the rocker arm shell, a motor installation cavity and a rocker arm installation cavity are arranged in the standing shell, the cutting motor is fixedly arranged in the motor installation cavity, the root of the rocker arm shell is rotatably supported in the rocker arm installation cavity through a front supporting and a rear supporting and positioning bearing, an output shaft of the cutting motor is connected with the rear-stage transmission system through the front-stage transmission system, the input end of the rear-stage transmission system is provided with a large gear and a planetary mechanism which are coaxially connected in sequence, and the large gear and the planetary mechanism are arranged in a cavity at the root of the, the axis of gear wheel with the center of rotation of the root of rocking arm casing is coaxial, the both ends of hydro-cylinder respectively with rocking arm casing and the casing that stews are articulated, the axis of gear wheel and the articulated axis at hydro-cylinder both ends all extend along the fore-and-aft direction, traction system is including pulling casing, high-speed section reduction gears, interlude reduction gears and traction motor, it is L shape to pull the casing, including front and back extension section and left and right extension section, traction motor and high-speed section reduction gears arrange in the front and back extension section, interlude reduction gears arranges in the left and right extension section, traction motor's the coaxial fixed connection of output shaft the input of high-speed section reduction gears, the coaxial fixed connection of output of high-speed section reduction gears the input of interlude reduction gears, in the left and right directions keeping away from of casing the one end of rocking arm installation cavity inlays the corner of the L shape of pulling casing, the front and rear extension sections are attached to and fixedly connected with the left and right of the standing shell.

The utility model discloses a rocking arm casing, including rocking arm installation cavity, casing notch, pinion and intermediate gear, the casing notch is equipped with on the casing of stewing on the public lateral wall between rocking arm installation cavity and other adjacent cavities, be equipped with rocking arm casing breach on the root lateral wall of rocking arm casing, under the installation status, rocking arm casing breach in week always keep with the casing notch has partial overlap area, preceding stage transmission system's output adopts mutual external toothing's pinion and intermediate gear, the intermediate gear with the gear wheel is in the overlap area of casing notch and rocking arm casing breach keeps the external toothing.

The bearing seat is further fixed on the inner wall of the cavity at the root of the rocker arm shell, the position, close to the large gear, of the inner wall of the cavity is close to the inner wall of the cavity, the input shaft diameter of the large gear is supported on the inner wall of the bearing seat through a bearing, a bearing seat notch is formed in the side wall of the bearing seat, and the circumferential position and the size of the bearing seat notch are consistent with those of the rocker arm shell notch.

The oil cylinder seat is arranged on the outer side of the root of the rocker arm shell and is also positioned in the closed cavity.

The rear space of the fore-stage transmission system in the standing shell is preferably set into an oil tank, a hydraulic system for providing hydraulic driving force for the oil cylinder is installed in the oil tank, and a transmission shaft in the fore-stage transmission system replaces a pump motor of the hydraulic system to provide power for the hydraulic system.

The left and right extension sections only reserve necessary installation space and necessary fabrication holes of the intermediate gear assembly, and the rest parts are made into solid bodies.

The height of the left and right extension sections is smaller than that of the front and rear extension sections, the middle and rear sections of the top surfaces of the left and right extension sections are preferably set to be inclined planes with high front and low rear, and the middle and rear sections of the bottom surfaces of the left and right extension sections are preferably set to be concave surfaces with concave middle parts in the front and rear directions.

The thin seam coal mining machine further comprises a traveling system, the traveling system can comprise a traveling box shell, a driving wheel shaft, a traveling wheel group, a traveling wheel shaft and a guide sliding shoe, the traveling box shell is fixed on the outer wall of the rear side of the left and right extension sections of the traction shell, the front end of the driving wheel shaft is coaxially and fixedly connected with the output end of the middle section speed reducing mechanism, the driving wheel shaft passes through the traction shell and the traveling box shell backwards and is rotatably supported on the front and rear side walls of the traveling box shell, the driving wheel is coaxially fixed on the driving wheel shaft, the two ends of the traveling wheel shaft are respectively rotatably supported on the front and rear side walls of the traveling box shell, a connecting gear in the traveling wheel group is coaxially and fixedly connected with the traveling wheel, the traveling wheel is coaxially arranged on the traveling wheel shaft, and the connecting gear is externally meshed, the guide slipper comprises a base and an ear seat positioned above the base, the base comprises a front side wall, a rear side wall and a top plate connected between the front side wall and the rear side wall, barbs are arranged at the bottom of the front side wall or the rear side wall, guide grooves extending left and right are respectively formed by the front side wall, the top plate, the rear side wall and the barbs at the left end and the right end of the base in a surrounding mode, the guide slipper is installed at the lower portion of the walking box and is connected with the shell of the walking box in a swinging mode through ear holes in the ear seat, the axis of the walking wheel shaft is overlapped with the central line of the ear holes, each ear hole is a waist-shaped hole which is wide in the left side and the right side and narrow in the up and down direction, a left concave surface and a right concave surface which are concave towards the inner portion of the base are arranged on the left side surface and the right side surface of the ear seat, the left top surface and the right side surface of the base, which are separated by the ear The driving wheel shaft is arranged close to the concave surface in the radial direction, and the driving wheel shaft is located between the lug seat and one of the guide grooves in the left-right direction.

The thin seam coal mining machine is further provided with a middle box, and the cutting system and the traction system are respectively provided with a left side and a right side which are respectively placed and fixed on the left side and the right side of the middle box.

The middle box comprises a front part and a middle rear part, the front top surface and the bottom surface are respectively the front top surface of the middle box and the front bottom surface of the middle box, the top surface of the middle rear part is divided into the middle top surface of the middle box and the rear top surface of the middle box from front to back, the bottom surface of the middle rear part is divided into the middle bottom surface of the middle box and the rear bottom surface of the middle box from front to back, the height of the middle rear part is smaller than that of the front part, the height of the middle top surface of the front part, the height of the middle bottom surface of the middle box is smaller than that of the middle rear top surface of the middle box, the height of the middle top surface of the middle box is smaller than that of the middle box, the middle rear bottom surface of the middle box is a.

The utility model has the advantages that:

the utility model discloses a cutting system has set up swing drive division and non-swing drive division, let the relative non-swing drive division dead axle swing of swing drive division, and will cut the motor, planetary mechanism, big medium-size spare parts such as gear wheel are placed in the casing of non-swing drive division, when swing drive division gyration, big medium-size spare part position is unchangeable, consequently the passageway that the front roll adopted the bed knife to cut out the fuselage of hanging, the back cylinder is adopted the top knife and is cut and leave the surplus coal platform, can not receive the influence of big medium-size spare part, consequently the rocking arm casing can not interfere with the coal platform, both realized hanging fuselage arrangement mode, coal-winning machine fuselage height has been reduced, the due mining height scope has been guaranteed again.

The utility model discloses draw forth a branch from non-swing transmission portion and replace pump motor and provide power for hydraulic system's pump package, because the power of cutting the motor is greater than the power of pump motor far away, consequently even hydraulic system's power demand is big again, also need not occupy bigger installation space because need be equipped with more powerful pump motor like traditional pump package, consequently hydraulic system compact structure, power is abundant simultaneously.

The utility model discloses the idle space in the casing that stews of non-swing transmission portion of make full use of is with its oil tank as hydraulic system, with its installation hydraulic system, makes coal-winning machine structure compacter, neither can increase the machine face height, can not increase the span of cylinder again.

The utility model discloses a with traction system's big middle-size's traction motor and high-speed section reduction gears arrange being close to the coal wall side, make be located between the two cylinders of left and right sides, the place ahead of coal-winning machine support is in the space that leans on down, the interlude reduction gears with small and medium size arranges in scraper conveyor's top, the below of the back timber front end thin beam of coal-winning machine support, when reducing the fuselage height, the top of the traction part between the cylinder has been guaranteed, there is sufficient effective roof below and the place ahead of being close to the coal wall, bottom plate and coal wall clearance.

Because the high-speed section speed reducing mechanism and the traction motor are axially arranged, the space occupation of the traction system in the left and right directions is reduced. Because the traction housing is arranged in an L shape, one part of the traction housing is arranged above the scraper conveyor, and the other part of the traction housing is arranged to overhang the coal wall side, the occupation of the traction system to the space between the left roller and the right roller is further reduced. Therefore, the left and right cutting devices can be arranged close to the middle of the machine body, so that the distance between the two rollers is greatly shortened, and the adaptability of the thin seam mining machine to the undulating working surface is greatly improved.

The utility model discloses a low inclined plane in high back before will drawing the top surface at the well rear portion of casing and middle box to and set the bottom surface at well rear portion to the concave surface of middle part indent on the fore-and-aft direction, make it and the scraper conveyor and coal-winning machine support between keep sufficient safe distance, improve the adaptability of thin seam coal-winning machine to undulation condition working face from this.

The utility model discloses an adopt the driving wheel axle to add the dual-axis structure's of running gear axle traveling system, the driving wheel diameter of the epaxial installation of driving wheel compares the walking wheel of original installation and reduces by a wide margin, the sunken surface that the left side of the ear seat of direction piston shoes and/or right side set up simultaneously can make the mounted position of driving wheel axle more be close to the running gear axle, make driving wheel axle and running gear axle reduce at direction of height's drop, consequently under the unchangeable condition of coal-winning machine fuselage plane height, the fuselage below, the mistake coal height of scraper conveyor top can increase a lot, consequently, can solve thin or extremely thin coal seam coal-winning machine and be meetting the bold coal, scraper machine card chain such as waste rock, coal-winning machine resistance increases and effective traction force not enough scheduling.

Drawings

Fig. 1 is a top view of an embodiment of the present invention;

FIG. 2 is a front view of one embodiment of the cutting system on the left;

FIG. 3 is a horizontal cross-sectional view of FIG. 2;

FIG. 4 is an enlarged view of the motorless rocker arm of FIG. 3;

FIG. 5 is a partial cross-sectional view of the rocker arm housing notch and bearing seat notch of FIG. 4;

FIG. 6 is a horizontal cross-sectional view of an embodiment of the traction system on the left;

FIG. 7 is a longitudinal cross-sectional view of the traction system shown in FIG. 6;

FIG. 8 is a front view of an embodiment of the walking system on the left;

FIG. 9 is a front view of the guide shoe of FIG. 8;

FIG. 10 is a cross-sectional view of the step A-A of FIG. 8;

FIG. 11 is a longitudinal cross-sectional view of one embodiment of the intermediate tank.

Reference numerals:

1. a cutting system; 11. a non-swing transmission part; 110. a cutting motor; 111. standing the shell; 1111. an oil tank; 113. a guard plate; 114. a hydraulic system; 1151. a pinion gear; 1152. an intermediate gear; 12. a motor-free rocker arm; 121. a rocker arm housing; 1211. a rocker arm housing gap; 1221. a bull gear; 1222. a planetary mechanism; 123. a bearing; 124. a bearing seat; 1241. a bearing seat notch; 13. an oil cylinder; 14. a drum;

2. a traction system; 20 a traction motor; 21. a traction housing; 22. a high-speed section reduction mechanism; 23. a middle section speed reducing mechanism; 231. a head end gear assembly; 232. an intermediate gear assembly; 233. a tip gear assembly; 241. a top surface of the front and rear extension sections; 242. a front section of the top surface of the left and right extension sections; 243. a middle rear section of the top surface of the left and right extension sections; 251. a bottom surface of the front and rear extension sections; 252. a front section of the bottom surface of the left and right extension sections; 253. a middle rear section of the bottom surface of the left and right extension sections;

3. a traveling system; 30. a walking box housing; 31. an integral drive wheel; 32. a traveling wheel set; 321. a connecting gear; 322. a traveling wheel; 323. a running wheel axle; 33. a guide shoe; 331. a base; 332. an ear mount; 333. a recessed surface;

4. an intermediate box; 411. a top surface of the front portion; 412. the middle top surface of the middle box; 413. a rear top surface of the intermediate box; 421. a bottom surface of the front portion; 422. the middle bottom surface of the middle box; 423. the rear bottom surface of the middle box;

5. a screw;

91. a support top beam; 911. a support thin beam; 912. supporting a thick beam;

92. a scraper conveyor;

93. a track.

Detailed Description

The utility model discloses a thin coal seam coal mining machine, as shown in fig. 1-11, including cutting system 1 and traction system 2, cutting system includes non-swing transmission portion 11, no motor rocking arm 12, cuts motor 110 and hydro-cylinder 13. The non-oscillating drive section includes a stationary housing 111 and a forward drive system disposed within the stationary housing. The motorless rocker arm is equivalent to a swing transmission part and comprises a rocker arm shell 121 and a rear-stage transmission system arranged in the rocker arm shell. The static shell is internally provided with a motor installation cavity and a rocker arm installation cavity, the cutting motor is fixedly installed in the motor installation cavity, the root of the cylindrical structure of the rocker arm shell is rotatably supported in the rocker arm installation cavity through a front supporting and positioning bearing 123 and a rear supporting and positioning bearing 123, so that the rocker arm shell can do fixed-axis swing relative to the static shell, wherein the root of the rocker arm shell only rotates in the static shell.

The output shaft of the cutting motor is connected with the rear-stage transmission system through the front-stage transmission system, namely, the power output by the cutting motor is transmitted to the roller 14 at the other end of the rocker arm shell through the front-stage transmission system and the rear-stage transmission system in sequence. The input end of the rear-stage transmission system is provided with a gearwheel 1221 and a planetary mechanism 1222 which are sequentially and coaxially connected, the gearwheel and the planetary mechanism are arranged in a cavity at the root of the rocker arm shell, and the axis of the gearwheel is coaxial with the rotation center at the root of the rocker arm shell. When the rocker arm swings in a fixed axis mode, the large gear 1221 and the planetary mechanism 1222 as large and medium-sized parts in a rear-stage transmission system are always in situ self-rotated in the standing shell, and the cutting motor as another large and medium-sized part is installed in the standing shell, so that the position of the cutting motor cannot be changed along with the swinging of the rocker arm, particularly the cutting motor does not have height change, a large space can be kept between the rocker arm shell and an upper coal platform, and the rocker arm shell cannot interfere with the coal platform and the like even when the rear rocker arm is used for mining a top cutter. Therefore, the utility model discloses can guarantee that theoretical height of adopting scope does not shrink when solving big medium-sized spare part and arranging the problem. In addition, compared with the middle-small-size parts of the cutting system, the large-middle-size parts are closer to the coal wall side, and the height of the machine face of the coal mining machine is favorably reduced. A, B, C correspond to the arrangement areas of small-size parts, medium-small-size parts and large-medium-size parts of the thin coal seam mining machine respectively, wherein the arrangement areas of the large-medium-size parts are closer to the coal wall side, and the arrangement areas of the small-size parts and the medium-small-size parts are positioned below the bracket top beam 91 and above the scraper conveyor 92. Wherein, the area A corresponds to the position below the thick beam 912 of the bracket, and the area B corresponds to the position from the thin beam 911 of the bracket to the lower part of the rear edge of the roller.

And two ends of the oil cylinder are respectively hinged with the rocker arm shell and the standing shell. The axis of the bull gear and the hinge axis at the two ends of the oil cylinder extend along the front and back directions. The front and rear directions of the coal mining machine are respectively the directions from the inside of the coal mining machine to the coal wall side and the mining side of the coal mining machine. The oil cylinder stretches and retracts to drive the rocker arm to swing relative to the non-swing transmission part.

The traction system includes a traction housing 21, a high-speed stage reduction mechanism 22, an intermediate stage reduction mechanism 23, and a traction motor 20. The traction shell is L-shaped and comprises a front extension section, a rear extension section, a left extension section, a right extension section, a traction motor and a high-speed section speed reducing mechanism, wherein the traction motor and the high-speed section speed reducing mechanism are arranged in the front extension section, the rear extension section and the middle section speed reducing mechanism are arranged in the left extension section and the right extension section. The output shaft of the traction motor is coaxially and fixedly connected with the input end of the high-speed section speed reducing mechanism, the output end of the high-speed section speed reducing mechanism is coaxially and fixedly connected with the input end of the middle section speed reducing mechanism, and the output end of the middle section speed reducing mechanism is closer to the end part, far away from the front and rear extending sections, of the left and right extending sections than the input end.

During installation, the left and right sides is in the direction of keeping away from of the shell of stewing the one end of the rocker arm installation cavity is embedded in the corner of the L shape of the traction shell, the front and back extension sections are attached and fixedly connected with the left and right sides of the shell of stewing. The front and rear extension sections are suspended and extend towards the coal wall side, and the output shaft of the traction motor extends towards the mining side. When the coal mining machine is a double-drum coal mining machine, the cutting system and the traction system are respectively arranged in a left-right mode and are symmetrically arranged in a left-right mode, and when the coal mining machine is a single-drum coal mining machine, only one cutting system or only one traction system is arranged in the left-right mode. When the three machines are matched, the left and right extension sections are arranged above the scraper conveyor 92 and below the bracket top beam 91.

The traction motor and the high-speed section speed reducing mechanism are large, medium and small parts, the middle section speed reducing mechanism is mainly made of medium and small parts, the traction motor and the high-speed section speed reducing mechanism are suspended on the side close to the coal wall, the middle section speed reducing mechanism is located in the area C, the middle section speed reducing mechanism is arranged above the scraper conveyor 92 and below the support top beam, the height of the machine body is reduced, and meanwhile, sufficient effective top plate, bottom plate and coal wall gaps are formed above and below the traction part between the rollers and in front of the coal wall.

The high-speed section speed reducing mechanism and the traction motor are axially arranged, so that the space occupation of the traction system in the left and right directions is reduced. And the traction housing is arranged in an L shape, one part of the traction housing is arranged above the scraper conveyor, and the other part of the traction housing is arranged to overhang the coal wall side, so that the occupation of the traction system to the space between the left roller and the right roller is further reduced. Therefore, the left and right cutting devices can be arranged close to the middle of the machine body, so that the distance between the two rollers is greatly shortened, and the adaptability of the thin seam mining machine to the undulating working surface is greatly improved.

Regarding the cutting system, as shown in fig. 3, in the installation state, the opening of the rocker arm installation cavity faces backwards, the root barrel structure of the rocker arm shell is inserted into the rocker arm installation cavity from back to front, and is rotatably supported on the inner wall of the rocker arm installation cavity through the front and back two supporting and positioning bearings 123. In this embodiment, the front section and the rear section of the inner wall of the rocker arm mounting cavity are respectively a front positioning hole and a rear positioning hole, and are respectively used for mounting a front supporting positioning bearing and a rear supporting positioning bearing.

The rocker arm housing further includes a head portion and a neck portion between the head portion and the root portion, the rocker arm housing presenting a reentrant configuration with both the head portion and the root portion projecting forwardly relative to the neck portion. The large gear 1221, the planetary 1222 and the small and medium-sized fixed-axis gear transmission structure constitute the rear stage transmission system. The fixed shaft gear transmission structure is positioned in the cavities of the neck and the head. The roller 14 is mounted on the head of the rocker housing and rotates relative to the rocker housing.

Further, the output of the pre-stage transmission may employ a pinion 1151 and an intermediate gear 1152 that are in external engagement with each other, the intermediate gear being in external engagement with the bull gear. And a shell notch is formed in a public side wall between the rocker arm installation cavity and other cavities adjacent to the rocker arm installation cavity on the standing shell and is used for providing a space for the rotation of the intermediate gear. The side wall of the root part of the rocker arm shell is correspondingly provided with a rocker arm shell notch 1211, and in the installation state, the rocker arm shell notch 1211 always keeps a partial overlapping area with the shell notch in the circumferential direction, and the overlapping area is large enough to ensure that the intermediate gear and the large gear are kept meshed in the overlapping area of the shell notch and the rocker arm shell notch.

In this embodiment, a bearing seat 124 is further fixed on the inner wall of the chamber at the root of the rocker arm housing 121, the inner wall of the bearing seat 124 being close to the large gear, and the shaft diameter of the input end of the large gear is supported by a bearing. In this case, a bearing seat notch 1241 is also provided in the side wall of the bearing seat, and referring to fig. 5, the circumferential position and size of the bearing seat notch 1241 preferably corresponds to the rocker arm housing notch 1211. The rocker arm housing indentations, along with the bearing seat indentations, together provide sufficient space for the intermediate gear 1152 and the bull gear 1221.

Besides the parts mentioned above, the front stage transmission system and the rear stage transmission system can adopt the existing transmission structure, such as gear transmission, spline transmission and the like.

The standing shell can be further provided with a guard plate 113, the standing shell, the rocker arm shell and the guard plate jointly enclose a closed cavity, an oil cylinder seat arranged on the standing shell is located in the closed cavity, and an oil cylinder seat arranged on the outer side of the root of the rocker arm shell is also located in the closed cavity. In the installation state, in the swinging process of the rocker arm without the motor, the whole oil cylinder is always positioned in the closed cavity. The closed cavity provides a good external environment for the oil cylinder, for example, the influence of coal dust gangue on the oil cylinder can be avoided, the oil cylinder is more reliable in stretching and retracting and has a longer service life, and therefore, a more reliable and high-quality support is provided for the rotation of the rocker arm relative to the non-swinging transmission part.

The idle space oil tank at the rear of the preceding stage transmission system in the standing shell is set into an oil tank 1111, a hydraulic system 114 for providing hydraulic driving force for the oil cylinder is installed in the oil tank, and a transmission shaft in the preceding stage transmission system replaces a pump motor of the hydraulic system to provide power for the hydraulic system, namely, the pump set is a pump set without the pump motor.

Because the power of the cutting motor is far greater than that of the pump motor, even if the power requirement of the hydraulic system is larger, the hydraulic system does not need to occupy larger installation space due to the need of equipping the pump motor with larger power as in the traditional pump set, and therefore the hydraulic system is compact in structure and has surplus power. The motor installation cavity and the rocker arm installation cavity are usually arranged at the left end and the right end of the standing shell, most space between the two cavities is an idle area, a part of the idle area is utilized to form a built-in oil tank, the oil tank of the hydraulic system is changed from an external position to a built-in position of the cutting system, the structure of the coal mining machine is more compact, the height of a machine face is not increased, and the span of a roller is not increased.

With regard to the traction system 2, the high-speed reduction mechanism 22 preferably employs a compact planetary mechanism to maintain a small axial dimension, ensure the strength and rigidity of the planetary axles, and also contribute to a reduction in the forward-backward dimension of the traction system.

The middle section speed reducing mechanism is a multi-shaft fixed-shaft transmission gear set, and comprises a head end gear assembly 231, a middle gear assembly 232 and a tail end gear assembly 233 which are sequentially arranged in a transmission direction, wherein the shafts are arranged in parallel, and the input end of the head end gear assembly is coaxially and fixedly connected with the output end of the high-speed section speed reducing mechanism. In the left and right extension sections, each transmission shaft in the middle section speed reducing mechanism corresponds to one mounting hole.

One or more drive shafts may be included in the idler gear assembly 232. The number of transmission shafts contained in the intermediate gear assembly is increased or decreased, and the traction shells of the left extension section and the right extension section with different lengths in the left direction and the right direction are matched and replaced, so that the span between the left walking wheel and the right walking wheel can be adjusted. When the span between the left walking wheel and the right walking wheel is properly increased, the overall stability of the coal mining machine can be improved. Due to the L-shaped structure of the traction shell and the arrangement position of the traction shell relative to the machine body, the distance between the left roller and the right roller cannot be increased while the walking wheel span is increased.

The left and right extension sections are designed according to the principle of minimizing the internal cavity, only the necessary installation space and the necessary processing process holes of the intermediate gear assembly and the associated parts are reserved, and the other parts are made into solid bodies, so that the center of gravity of the whole coal mining machine can be moved to the mining side, the running balance of the coal mining machine is kept, and the abrasion of a guide device is reduced.

The height of the left and right extension sections is less than that of the front and rear extension sections. The front and rear extensions are located in region C, and both the top surface 241 and the bottom surface 251 are horizontal planes. The front section 242 of the top surface of the left and right extension section is set to be a horizontal surface, the middle and rear sections 243 of the top surface of the left and right extension section are set to be an inclined surface with a higher front part and a lower rear part, and the inclined angle of the inclined surface is preferably parallel or nearly parallel with the bottom inclined surface of the support thick beam 912 of the support top beam 91 of the coal mining machine. The front section 242 and the middle and rear section 243 of the top surface of the left and right extension section respectively correspond to the area B and the area A, and respectively keep equal distance with the flat bottom surface of the front bracket thin beam 911 of the bracket top beam 91 and the inclined bottom surface of the middle and rear bracket thick beam 912, so that enough effective passing clearance above the coal mining machine is ensured.

The front section 252 of the bottom surface of the left and right extension section is set to a horizontal surface, and the middle rear section 253 of the bottom surface of the left and right extension section is set to a concave surface whose middle part is concave in the front-rear direction, so that a sufficient coal passing gap can be maintained between the traction housing 21 and the scraper conveyor 92.

Therefore, enough safety distance is reserved between the front and rear extension sections and the top plate, the bottom plate and the coal wall, or between the left and right extension sections and the bracket and the scraper conveyor of the coal mining machine, so that the top plate gap, the bottom plate gap, the coal wall gap and the machine passing gap can be ensured, and the adaptability of the thin coal seam coal mining machine to the working face under the fluctuating condition is improved.

The thin seam mining machine further comprises a traveling system 3, and the traveling system can comprise a traveling box shell 30, a driving wheel shaft, a traveling wheel group 32, a traveling wheel shaft 323 and a guide slipper 33. The traveling box housing 30 is fixed to the rear outer walls of the left and right extension sections of the traction housing 21. The front end of the driving wheel shaft is coaxially and fixedly connected with the output end of the middle section speed reducing mechanism, and the driving wheel shaft penetrates through the traction shell and the walking box shell backwards and is rotatably supported on the front side wall and the rear side wall of the walking box shell. The driving wheel is coaxially fixed on the driving wheel shaft. Two ends of the walking wheel shaft 323 are rotatably supported on the front and rear side walls of the walking box shell 30 respectively, the connecting gear 321 and the walking wheel 322 in the walking wheel set are coaxially and fixedly connected, and the walking wheel is coaxially mounted on the walking wheel shaft. The connecting gear 321 is externally engaged with the driving wheel.

The guide shoe 33 includes a base 331 including a front side wall, a rear side wall, and a top plate connected between the tops of the front and rear side walls, and a barb disposed at the bottom of either the front or rear side wall, and an ear mount 332 disposed above the base and generally midway along the left-right length. The left and right ends of the base are respectively surrounded by a front side wall, a top plate, a rear side wall and barbs to form a guide groove extending left and right and used for being matched with the rail 93. The rear surface of the front side wall, the bottom surface of the top plate, the front surface of the rear side wall and the top surface of the barb are all provided with wear-resistant layers. The guide sliding shoes are installed on the lower portion of the walking box shell, and are connected with the walking box shell in a swinging mode through ear holes in ear seats of the guide sliding shoes. Ideally, the axis of the walking wheel shaft coincides with the center line of the ear hole. The guide sliding shoes can have small movement amount in the front-back direction relative to the walking box shell, and the lug holes are waist-shaped holes which are wide at the left and right and narrow at the upper and lower parts, so that the guide sliding shoes have enough swinging space in the horizontal and vertical directions.

The guide shoe is provided with a left concave surface 333 and a right concave surface 333 which are respectively concave to the inside of the base, and the concave surfaces are positioned on at least one of the left side surface and the right side surface of the ear seat, the left top surface and the right top surface of the base which are separated by the ear seat, and the transition connection part of the left side and the right side of the ear seat and the top surface of the base (namely the top surface of the top plate). The drive axle is disposed as close as possible to the recessed surface in the radial direction, and the drive axle is located between the lug and one of the guide grooves in the left-right direction.

The traveling system of current thin or extremely thin coal seam coal-winning machine only has a root axis, promptly the utility model provides a driving wheel axle, its front portion is located the fuselage of coal-winning machine, connects the traction system of coal-winning machine, receives the power that comes from traction system, and the rear portion is located traveling system, the direct mount walking wheel on it. The road wheels are usually large in module and large in diameter in consideration of the external meshing walking force and wear requirements. According to the current design rule, the larger the diameter of the gear installed on the driving wheel shaft is, the lower the axis of the driving wheel shaft is relative to the machine surface, so that the thicker the machine body is, the smaller the coal passing height under the condition of the same machine surface height is.

When adopting the utility model discloses a behind the traveling system of the biax structure of drive wheel axle with the running wheel axle, the last installation of drive wheel axle is no longer the walking wheel, but the drive wheel, because no walking wheel and orbital meshing requirement have been met, the diameter of drive wheel is compared the walking wheel and can is dwindled by a wide margin, consequently, the axis of drive wheel axle can shift up by a wide margin, consequently, the obvious attenuate of fuselage thickness of needs, correspondingly, the high obvious increase of the coal of passing under the circumstances that the machine face height is the same, consequently, can solve thin or extremely thin seam coal mining machine and be meetting the bold coal, scraper conveyor clamp chain such as waste rock, the coal-winning machine resistance increases and effective traction force.

The recessed surface is arranged to leave a space for the driving wheel shaft to be installed closer to the walking wheel shaft in the radial direction. The driving wheel shaft and the walking wheel shaft are arranged close to each other, so that the fall of the driving wheel shaft and the walking wheel shaft in the height direction can be greatly reduced, and the coal passing height below the machine body and above the scraper conveyor can be further increased under the condition that the machine surface height of the machine body of the coal mining machine is unchanged.

The driving wheel and the driving wheel shaft are preferably of an integrated structure and can be called as an integrated driving wheel 31, compared with a split structure, the diameters of the wheel shaft and the gear part can be smaller, the height of a machine face can be set lower, and meanwhile, the coal passing height under a larger machine body is also provided. Under the condition of unchanged height of the machine surface, the coal passing height can be further increased. Because the connecting gear is meshed with the driving wheel with smaller diameter, the travelling mechanism has larger transmission ratio, the size of the related structure of the traction system can be smaller, the service life can be longer, and simultaneously, compared with the direct driving of the driving wheel to the travelling wheel, the service life of the gear can be greatly prolonged by adopting multi-gear transmission of the driving wheel to the travelling wheel through the connecting gear.

The driving wheel shaft and the walking wheel shaft are respectively rotatably supported on the walking box shell through bearings. The connecting gear is connected with the traveling wheel through a spline, and the connecting gear and the traveling wheel are fixed in the axial direction. The walking wheel is sleeved on the walking wheel shaft, the axial middle part of the walking wheel is in splined connection with the walking wheel shaft, and no axial limit is arranged between the walking wheel and the walking wheel shaft. The two ends of the travelling wheels are in clearance fit with the axle holes of the travelling wheel shafts, and the travelling wheels can flexibly slide along the axial direction of the travelling wheel shafts, so that the adaptability of the travelling wheels relative to the track can be improved. After the walking wheel and the walking wheel shaft adopt the connecting structure, the diameter of the walking wheel can be set to be smaller, so that the height of a machine surface can be kept lower and the adaptability is better.

The thin seam coal mining machine is further provided with a middle box 4, and the cutting system and the traction system are respectively provided with a left side and a right side which are respectively placed and fixed on the left side and the right side of the middle box. During connection, the left-right direction is taken as the main connection direction among the standing shell 111, the traction shell 21 and the middle box 4, the joint surface is positioned by a positioning pin, and the screw rod 5 is matched with a nut to be connected and fastened left and right. In addition, still set up auxiliary connection spare in the front and back direction between casing of stewing and the traction housing and fasten to improve the joint strength of the two.

The interior space of the intermediate box can be used for installing the electric control system of the shearer and the associated pipelines.

The intermediate box may be divided into a front portion and a middle rear portion, the front portion being located at the C region. The top surface 411 and the bottom surface 421 of the front part are respectively the front top surface and the front bottom surface of the middle box, and the top surface of the middle rear part is divided into a middle top surface 412 of the middle box and a rear top surface 413 of the middle box from front to rear, which respectively correspond to the B area and the A area. The bottom surface of the middle rear part is divided into two sections, namely a middle bottom surface 422 of the middle box and a rear bottom surface 423 of the middle box from front to rear, and the two sections correspond to the B area and the A area respectively. The middle rear portion is shorter in height than the front portion. The height of top surface and middle case back top surface reduces in proper order in the middle of anterior top surface, middle case, the bottom surface highly is higher than anterior bottom surface behind the middle case, the bottom surface passes through between anterior bottom surface and middle case back bottom surface in the middle of the middle case, top surface is the low inclined plane in high back before the middle case back, the bottom surface is the concave surface of middle part indent in the fore-and-aft direction behind the middle case. The arrangement is also used for ensuring that the coal mining machine has enough effective machine passing clearance above the coal mining machine and has enough coal passing height below the coal mining machine.

Claims (22)

1. A thin coal seam coal mining machine is characterized in that: the cutting machine comprises a cutting system and a traction system, wherein the cutting system comprises a non-swing transmission part, a motor-free rocker arm, a cutting motor and an oil cylinder, the non-swing transmission part comprises a standing shell and a front-stage transmission system arranged in the standing shell, the motor-free rocker arm comprises a rocker shell and a rear-stage transmission system arranged in the rocker shell, a motor installation cavity and a rocker arm installation cavity are arranged in the standing shell, the cutting motor is fixedly arranged in the motor installation cavity, the root of the rocker shell is rotatably supported in the rocker arm installation cavity through a front supporting and positioning bearing and a rear supporting and positioning bearing, an output shaft of the cutting motor is connected with the rear-stage transmission system through the front-stage transmission system, a large gear and a planetary mechanism which are coaxially connected in sequence are arranged at the input end of the rear-stage transmission system, and the large gear and the planetary mechanism are arranged in a cavity at the, the axis of gear wheel with the center of rotation of the root of rocking arm casing is coaxial, the both ends of hydro-cylinder respectively with rocking arm casing and the casing that stews are articulated, the axis of gear wheel and the articulated axis at hydro-cylinder both ends all extend along the fore-and-aft direction, traction system is including pulling casing, high-speed section reduction gears, interlude reduction gears and traction motor, it is L shape to pull the casing, including front and back extension section and left and right extension section, traction motor and high-speed section reduction gears arrange in the front and back extension section, interlude reduction gears arranges in the left and right extension section, traction motor's the coaxial fixed connection of output shaft the input of high-speed section reduction gears, the coaxial fixed connection of output of high-speed section reduction gears the input of interlude reduction gears, in the left and right directions keeping away from of casing the one end of rocking arm installation cavity inlays the corner of the L shape of pulling casing, the front and rear extension sections are attached to and fixedly connected with the left and right of the standing shell.

2. The thin seam shearer of claim 1, wherein: the utility model discloses a rocking arm casing, including rocking arm installation cavity, casing notch, pinion and intermediate gear, the casing notch is equipped with on the casing of stewing on the public lateral wall between rocking arm installation cavity and other adjacent cavities, be equipped with rocking arm casing breach on the root lateral wall of rocking arm casing, under the installation status, rocking arm casing breach in week always keep with the casing notch has partial overlap area, preceding stage transmission system's output adopts mutual external toothing's pinion and intermediate gear, the intermediate gear with the gear wheel is in the overlap area of casing notch and rocking arm casing breach keeps the external toothing.

3. The thin seam shearer of claim 2, wherein: the bearing seat is further fixed on the inner wall of the cavity at the root of the rocker arm shell, the position, close to the large gear, of the inner wall of the cavity is close to the inner wall of the cavity, the input shaft diameter of the large gear is supported on the inner wall of the bearing seat through a bearing, a bearing seat notch is formed in the side wall of the bearing seat, and the circumferential position and the size of the bearing seat notch are consistent with those of the rocker arm shell notch.

4. The thin seam shearer of claim 3, wherein: the oil cylinder seat is arranged on the outer side of the root of the rocker arm shell and is also positioned in the closed cavity.

5. The thin seam shearer of claim 4, wherein: the rear space of the fore-stage transmission system in the standing shell is set into an oil tank, a hydraulic system for providing hydraulic driving force for the oil cylinder is installed in the oil tank, and a transmission shaft in the fore-stage transmission system replaces a pump motor of the hydraulic system to provide power for the hydraulic system.

6. The thin seam shearer of claim 1, 2, 3, 4, or 5, wherein: high-speed section reduction gears adopts compact planetary mechanism, interlude reduction gears is dead axle transmission gear group, includes head end gear assembly, intermediate gear assembly and the terminal gear assembly that sets gradually according to the transmission direction, each axle parallel arrangement, the input of head end gear assembly with the coaxial fixed connection of high-speed section reduction gears's output, include one or many transmission shafts in the intermediate gear assembly.

7. The thin seam shearer of claim 6, wherein: the left and right extension sections only reserve necessary installation space and necessary fabrication holes of the intermediate gear assembly, and the rest parts are made into solid bodies.

8. The thin seam shearer of claim 7, wherein: the height of the left and right extension sections is smaller than that of the front and back extension sections, the middle and back sections of the top surfaces of the left and right extension sections are arranged to be inclined planes with high front parts and low back parts, and the middle and back sections of the bottom surfaces of the left and right extension sections are arranged to be concave surfaces with concave parts in the middle in the front and back directions.

9. The thin seam shearer of claim 6, wherein: the walking mechanism comprises a walking box shell, a driving wheel shaft, a walking wheel group, a walking wheel shaft and a guide sliding shoe, wherein the walking box shell is fixed on the outer wall of the rear side of the left and right extension sections of the traction shell, the front end of the driving wheel shaft is coaxially and fixedly connected with the output end of the middle section speed reducing mechanism, the driving wheel shaft passes through the traction shell and the walking box shell backwards and is rotatably supported on the front and rear side walls of the walking box shell, the driving wheel is coaxially fixed on the driving wheel shaft, the two ends of the walking wheel shaft are respectively rotatably supported on the front and rear side walls of the walking box shell, a connecting gear and a walking wheel in the walking wheel group are coaxially and fixedly connected, the walking wheel is coaxially arranged on the walking wheel shaft, the connecting gear is externally engaged with the driving wheel, the guide sliding shoe comprises a base and an ear seat positioned above the base, the base comprises a front side wall, a rear side wall and a top plate connected between the front side wall and the rear side wall, the bottom of the front side wall or the rear side wall is provided with a barb, the left end and the right end of the base are respectively surrounded by the front side wall, the top plate, the rear side wall and the barb to form a guide groove extending left and right, the guide slipper is installed at the lower part of the walking box and is connected with the shell of the walking box in a swinging mode through an ear hole on an ear seat of the guide slipper, the axis of a walking wheel shaft is superposed with the central line of the ear hole, the ear hole is a waist-shaped hole which is wide on the left and right and narrow on the upper and lower sides, the guide slipper is provided with a left concave surface and a right concave surface which are concave towards the inside of the base, the concave surfaces are positioned on at least one of the left side surface and the right side surface of the ear seat, the left and right top surfaces, the drive axle is disposed radially adjacent to the recessed surface, and the drive axle is located between the ear mount and one of the guide grooves in the left-right direction.

10. The thin seam shearer of claim 9, wherein: the driving wheel and the driving wheel shaft are of an integrated structure, the driving wheel shaft and the walking wheel shaft are rotatably supported on the walking box shell through bearings, the connecting gear is connected with the walking wheel through a spline and fixed with each other in the axial direction, the walking wheel is sleeved on the walking wheel shaft, the axial middle part of the walking wheel is connected with the walking wheel shaft through a spline, and two ends of the walking wheel are in clearance fit with the shaft hole between the walking wheel shaft.

11. The thin seam shearer according to any one of claims 1 to 5, wherein: the cutting system and the traction system are respectively provided with a left side and a right side, and are respectively placed and fixed on the left side and the right side of the middle box.

12. The thin seam shearer of claim 6, wherein: the cutting system and the traction system are respectively provided with a left side and a right side, and are respectively placed and fixed on the left side and the right side of the middle box.

13. The thin seam shearer of claim 7, wherein: the cutting system and the traction system are respectively provided with a left side and a right side, and are respectively placed and fixed on the left side and the right side of the middle box.

14. The thin seam shearer of claim 8, wherein: the cutting system and the traction system are respectively provided with a left side and a right side, and are respectively placed and fixed on the left side and the right side of the middle box.

15. The thin seam shearer of claim 9, wherein: the cutting system and the traction system are respectively provided with a left side and a right side, and are respectively placed and fixed on the left side and the right side of the middle box.

16. The thin seam shearer of claim 10, wherein: the cutting system and the traction system are respectively provided with a left side and a right side, and are respectively placed and fixed on the left side and the right side of the middle box.

17. The thin seam shearer of claim 11, wherein: the middle box comprises a front part and a middle rear part, the front top surface and the bottom surface are respectively the front top surface of the middle box and the front bottom surface of the middle box, the top surface of the middle rear part is divided into the middle top surface of the middle box and the rear top surface of the middle box from front to back, the bottom surface of the middle rear part is divided into the middle bottom surface of the middle box and the rear bottom surface of the middle box from front to back, the height of the middle rear part is smaller than that of the front part, the height of the middle top surface of the front part, the height of the middle bottom surface of the middle box is smaller than that of the middle rear top surface of the middle box, the height of the middle top surface of the middle box is smaller than that of the middle box, the middle rear bottom surface of the middle box is a.

18. The thin seam shearer of claim 12, wherein: the middle box comprises a front part and a middle rear part, the front top surface and the bottom surface are respectively the front top surface of the middle box and the front bottom surface of the middle box, the top surface of the middle rear part is divided into the middle top surface of the middle box and the rear top surface of the middle box from front to back, the bottom surface of the middle rear part is divided into the middle bottom surface of the middle box and the rear bottom surface of the middle box from front to back, the height of the middle rear part is smaller than that of the front part, the height of the middle top surface of the front part, the height of the middle bottom surface of the middle box is smaller than that of the middle rear top surface of the middle box, the height of the middle top surface of the middle box is smaller than that of the middle box, the middle rear bottom surface of the middle box is a.

19. The thin seam shearer of claim 13, wherein: the middle box comprises a front part and a middle rear part, the front top surface and the bottom surface are respectively the front top surface of the middle box and the front bottom surface of the middle box, the top surface of the middle rear part is divided into the middle top surface of the middle box and the rear top surface of the middle box from front to back, the bottom surface of the middle rear part is divided into the middle bottom surface of the middle box and the rear bottom surface of the middle box from front to back, the height of the middle rear part is smaller than that of the front part, the height of the middle top surface of the front part, the height of the middle bottom surface of the middle box is smaller than that of the middle rear top surface of the middle box, the height of the middle top surface of the middle box is smaller than that of the middle box, the middle rear bottom surface of the middle box is a.

20. The thin seam shearer of claim 14, wherein: the middle box comprises a front part and a middle rear part, the front top surface and the bottom surface are respectively the front top surface of the middle box and the front bottom surface of the middle box, the top surface of the middle rear part is divided into the middle top surface of the middle box and the rear top surface of the middle box from front to back, the bottom surface of the middle rear part is divided into the middle bottom surface of the middle box and the rear bottom surface of the middle box from front to back, the height of the middle rear part is smaller than that of the front part, the height of the middle top surface of the front part, the height of the middle bottom surface of the middle box is smaller than that of the middle rear top surface of the middle box, the height of the middle top surface of the middle box is smaller than that of the middle box, the middle rear bottom surface of the middle box is a.

21. The thin seam shearer of claim 15, wherein: the middle box comprises a front part and a middle rear part, the front top surface and the bottom surface are respectively the front top surface of the middle box and the front bottom surface of the middle box, the top surface of the middle rear part is divided into the middle top surface of the middle box and the rear top surface of the middle box from front to back, the bottom surface of the middle rear part is divided into the middle bottom surface of the middle box and the rear bottom surface of the middle box from front to back, the height of the middle rear part is smaller than that of the front part, the height of the middle top surface of the front part, the height of the middle bottom surface of the middle box is smaller than that of the middle rear top surface of the middle box, the height of the middle top surface of the middle box is smaller than that of the middle box, the middle rear bottom surface of the middle box is a.

22. The thin seam shearer of claim 16, wherein: the middle box comprises a front part and a middle rear part, the front top surface and the bottom surface are respectively the front top surface of the middle box and the front bottom surface of the middle box, the top surface of the middle rear part is divided into the middle top surface of the middle box and the rear top surface of the middle box from front to back, the bottom surface of the middle rear part is divided into the middle bottom surface of the middle box and the rear bottom surface of the middle box from front to back, the height of the middle rear part is smaller than that of the front part, the height of the middle top surface of the front part, the height of the middle bottom surface of the middle box is smaller than that of the middle rear top surface of the middle box, the height of the middle top surface of the middle box is smaller than that of the middle box, the middle rear bottom surface of the middle box is a.

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