CN111411951A - Thin coal seam short-body coal mining machine - Google Patents

Abstract

The invention relates to a short-coal-seam coal mining machine, which comprises a cutting system, a machine body shell, a traction system and an electric control system, wherein the traction system and the electric control system are arranged in the machine body shell, the electric control system is arranged in the middle, the left traction system and the right traction system are respectively arranged on the left side and the right side of the electric control system, large, medium and small-size parts of the traction system are mainly arranged at the front part, the middle part and the rear part of the machine body shell respectively, large, medium and small-size electric parts of the electric control system are mainly arranged at the front part, the middle part and the rear part of the machine body shell respectively, rocker arms of the cutting system are hinged at the left end and the right end of the front part outside the machine body shell by virtue of oil cylinders, and the arrangement positions of the large, medium and small-size parts of the cutting transmission system respectively. The invention can make the corresponding coal mining machine more easily adapt to the mining requirements of thin or extremely thin coal layers on complex working faces under the conditions of low mining height, high coal rock hardness and the like.

Description

Thin coal seam short-body coal mining machine

Technical Field

The invention relates to a thin coal seam coal mining machine which is mainly used for mining thin or extremely thin coal seams on complex working faces under conditions of low mining height, high coal rock hardness and the like.

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 the power is increased, the size of the motor, the transmission system and the like is increased greatly, and therefore, the structural arrangement of the thin or ultra-thin coal seam mining machine is a key point and a difficult point of the structural design of the mining machine.

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. The mode is adopted on a thin coal seam coal mining machine, although the structural arrangement problem can be improved to a certain extent, for example, the gap of the coal mining machine is increased, the outstanding problems in other aspects are brought, including that the height of the local structure of the coal mining machine close to one side of a coal wall is higher, the span distance between a left roller and a right roller is larger, the adaptability of the rollers to the mining height is poor, the height of the machine face of the coal mining machine under a support is higher, the coal passing space above a scraper conveyor is small, the adaptability to a fluctuating working face is poor, the range of cutting rotating speed is small, the range of cutting parameters adapting to different hardness of coal and gangue is small, the distance between the left roller and the right roller is further enlarged due to the fact that a pump station system is usually arranged in a left and. Therefore, the proposal still has difficulty meeting the mining requirements of the extremely thin or thin coal seam, in particular the mining requirements of the extremely thin or thin coal seam with complex conditions such as low mining height, high coal rock hardness and the like.

Disclosure of Invention

The invention aims to provide a short-body coal mining machine for a thin coal seam, which can meet the mining requirements of thin or extremely thin coal seams on complex working faces under the conditions of low mining height, high coal rock hardness and the like.

The main technical scheme of the invention is as follows:

a short-coal-seam coal mining machine comprises a cutting system, a machine body shell, and a traction system and an electric control system which are arranged in the machine body shell, wherein the electric control system is arranged in the middle, the traction system is provided with two sets which are respectively arranged on the left side and the right side of the electric control system, the spaces where the electric control system and the two sets of traction systems are respectively arranged are mutually independent, large, medium and small-sized parts of the traction system are mainly arranged on the front portion, the middle portion and the rear portion of the machine body shell respectively, the large, medium and small-sized electric parts of the electric control system are mainly arranged on the front portion and the middle portion of the machine body shell, the middle and small-sized electric parts of the electric control system are mainly arranged on the middle portion and the rear portion of the machine body shell, the height of the rear portion of the machine body shell is not greater than the middle portion, the height of, the cutting system comprises a left rocker arm, a right rocker arm, a left oil cylinder and a right oil cylinder, one end of each rocker arm is hinged to the corresponding rocker arm connecting lug, one end of each oil cylinder is hinged to the corresponding oil cylinder connecting lug, the other end of each oil cylinder is hinged to the corresponding rocker arm, the hinge axis extends forwards and backwards, a cutting transmission system is arranged inside the shell of each rocker arm, and the cutting transmission system corresponds to the front part and the middle part of the shell of the machine body in the front-back direction of the arrangement position of large, medium and small-sized parts.

In the fuselage casing, be equipped with between high-voltage electrical spare part and the low-voltage electrical spare part and separate the wall, the preceding major possession dismouting mouth that is equipped with of fuselage casing, the top surface is equipped with top dismouting mouth, major possession dismouting mouth and top dismouting mouth all communicate with each other with the space of large and medium-sized electrical spare part place.

And pump box systems are respectively arranged on the outer sides of the left end and the right end of the rear part of the machine body shell, and provide hydraulic pressure for the oil cylinders.

The cutting transmission system can comprise a cutting motor, a first variable transmission mechanism, a second variable transmission mechanism, a speed reducing mechanism and a fixed shaft gear transmission mechanism which are connected in sequence.

The traction system comprises a high-speed section speed reducing mechanism, an intermediate section speed reducing mechanism and a traction motor, wherein an output shaft of the traction motor is coaxially and fixedly connected with an input end of the high-speed section speed reducing mechanism, an output end of the high-speed section speed reducing mechanism is coaxially and fixedly connected with an input end of the intermediate section speed reducing mechanism, the traction motor and the high-speed section speed reducing mechanism are respectively arranged at the front part and the middle part of the body shell, the intermediate section speed reducing mechanism is arranged at the middle part of the body shell, an output end of the intermediate section speed reducing mechanism is arranged at the outer side of the input end in the left-right direction.

The thin coal seam short-machine-body coal mining machine further comprises a left traveling system and a right traveling system, the traveling systems comprise a traveling box shell, a driving wheel shaft, a traveling wheel assembly, 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 machine body 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 penetrates through the machine body shell and the traveling box shell backwards and is rotatably supported on the front side wall and the rear side wall of the traveling box shell, the driving wheel is coaxially fixed on the driving wheel shaft, two ends of the traveling wheel shaft are respectively rotatably supported on the front side wall and the rear side wall of the traveling box shell, a large gear in the traveling wheel assembly is coaxially and fixedly connected with a traveling wheel, the traveling wheel is coaxially, 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, 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 manner through an ear hole on the ear seat of the guide slipper, the axis of the walking wheel shaft is superposed with the central line of the ear hole, the guide slipper is provided with a left concave surface and a right concave surface which are respectively 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 top surface and the right top surface of the base separated by the ear seat, 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.

The preferable structure is that the axial middle part of the travelling wheel is connected with a travelling wheel shaft in a spline mode, and two ends of the travelling wheel are in clearance fit with a shaft hole between the travelling wheel shaft.

The middle part of the fuselage shell is close to the left end and the right end, and a supporting device can be respectively arranged on the left end and the right end, the supporting device can comprise a supporting plate and a sliding shoe, the upper part of the supporting plate is fixed at the bottom of the fuselage shell, the upper part of the sliding shoe is hinged with the lower part of the supporting plate through a pin, and a hinge axis extends forwards and backwards.

Fuselage casing can divide into the interlude in the middle and be located the interlude about the walking on both sides and support the section, in the full width range in front and back direction, the top surface of interlude all is less than the top surface that the walking supported the section, the bottom surface of interlude all is higher than the bottom surface that the walking supported the section.

The top surface of the middle section can be divided into a front top surface of the middle section, a middle top surface of the middle section and a rear top surface of the middle section in the front-rear direction; the bottom surface of the middle section can be divided into a middle section front bottom surface, a middle section middle bottom surface and a middle section rear bottom surface in the front-rear direction; the top surface of the walking support section can be divided into a front top surface of the walking support section, a middle top surface of the walking support section and a rear top surface of the walking support section in the front-rear direction; the bottom surface of the walking support section can be divided into a front bottom surface of the walking support section, a middle bottom surface of the walking support section and a rear bottom surface of the walking support section in the front-rear direction; the bottom surface is corresponding to the front portion of fuselage casing before top surface, bottom surface, walking support section before the interlude supports the section and the walking supports the section, top surface, bottom surface, walking support section in the middle of the interlude support the middle of section middle bottom surface corresponding to the middle part of fuselage casing, top surface behind top surface, interlude, walking support section back top surface and walking support section back bottom surface are corresponding to the rear portion of fuselage casing behind the interlude, and top surface and walking support section back top surface are the low inclined plane in preceding height after the interlude, and bottom surface and walking support section back bottom surface are the concave surface of middle part indent in the preceding rear direction behind the interlude.

The invention has the beneficial effects that:

the traction system and the electric control system are integrally installed in the same machine body shell, and a conventional structure that split parts are connected is omitted, so that the machine body of the coal mining machine is shortened and narrowed, namely, the machine body of the coal mining machine is more compact, the adaptability of the corresponding coal mining machine to an undulating working surface is better, and the overall reliability is also ensured.

The large and medium-sized parts in the traction system, the electric control system and the cutting system are mainly arranged in a C area close to the coal wall side and beside the roller, the medium and small-sized parts are mainly arranged in a B area below a thin beam of the support, and the small-sized parts are mainly arranged in an A area below a thick beam of the support, so that the space can be more reasonably utilized, the high-power thin coal seam coal mining machine with a short machine body can have a lower machine face height and a larger coal passing space, the overall structure of the machine body can keep enough gaps with a top plate, a bottom plate, a top beam of the support and a scraper conveyor, the mining requirements of a fluctuating top plate, a bottom plate, coal gangue and the like are met, and the smooth mining of ultra-thin or thin coal seams with complex conditions such as coal rocks.

Because the cutting system adopts a two-stage variable speed transmission mechanism, the change range of the rotating speed is greatly increased, and the selection range of cutting parameters of materials with different hardness of the coal gangue is expanded.

The traction system adopts a compact planetary mechanism with a high-speed level and a large reduction ratio, the front-back width dimension of the traction system can be reduced, the strength and the rigidity of a planetary wheel shaft are ensured, the large reduction ratio is provided, and then the dimension of the middle section reduction mechanism can be reduced and the service life of the middle section reduction mechanism can be prolonged.

The number of transmission shafts contained in the intermediate gear assembly can be increased or decreased, and the machine body shells with different lengths in the left and right directions can be matched and replaced, so that the span between the left and right traveling systems can be adjusted. When the span between the left and right travelling wheels is properly increased, the overall stability of the coal mining machine can be improved, and the distance between the left and right rollers cannot be increased.

The top surface and the bottom surface of the body shell are sectionally arranged into different heights in the front-back direction to adapt to the size of the environment space at different positions, so that enough and larger effective gaps can be reserved among the body shell, the top plate, the bottom plate, the top beam and the scraper conveyor, and the adaptability of the coal mining machine to the fluctuation conditions can be better ensured.

The local structure of the machine body shell for accommodating the electric control system is provided with a large assembly and disassembly port, a top assembly and disassembly port and other structures, so that the maintainability of the electric parts of the machine body of the short machine body coal mining machine is greatly improved.

The compact planetary mechanism can provide a large reduction ratio, the rigidity and the strength of a planetary wheel shaft of the compact planetary mechanism can be improved, the size of the middle section speed reducing mechanism is reduced, the service life of the middle section speed reducing mechanism is prolonged, and correspondingly, the size of the integrated driving wheel connected with the output end of the middle section speed reducing mechanism can be smaller, so that the height difference between the walking wheel shaft and the driving wheel shaft is favorably shortened, and the height of a machine face is favorably reduced or the coal passing height is favorably increased.

The invention adopts a double-shaft structure walking system of a driving wheel shaft and a walking wheel shaft, the driving wheel with the diameter far smaller than that of the walking wheel is arranged on the driving wheel shaft, and the required machine body thickness is obviously reduced, so the coal passing height is obviously increased under the condition of the same machine face height. Therefore, the problems that the thin or extremely thin coal seam coal mining machine is blocked by the scraper machines such as large coal, gangue and the like, the resistance of the coal mining machine is increased, the effective traction force is insufficient and the like can be solved.

Because the left side and/or the right side of the lug seat of the guide sliding shoe are/is provided with the concave surfaces, the mounting position of the driving wheel shaft can be closer to the walking wheel shaft, so the fall of the driving wheel shaft and the walking wheel shaft in the height direction can be set to be very small, and the coal passing height below the machine body and above the scraper conveyor can be further increased under the condition that the height of the machine body surface of the coal mining machine is not changed.

Due to the adoption of the integrated driving wheel, the diameters of the wheel shaft and the gear part of the driving wheel can be smaller, and the diameter of the walking wheel is also determined by the installation mode between the walking wheel and the walking wheel shaft, so that the walking box with a double-shaft structure on the thin or extremely-thin coal seam coal mining machine becomes possible, the realization of the enough coal passing height or the lower machine face height is facilitated, and the normal meshing of the walking system and the scraper conveyor track can be ensured. And because the driving wheel is driven by a plurality of gears through the big gear and then to the walking wheel, compared with the direct driving of the driving wheel to the walking wheel, the service life of the gears can be greatly prolonged.

Drawings

FIG. 1 is a front view of one embodiment of the present invention;

FIG. 2 is a horizontal cross-sectional view of FIG. 1;

FIG. 3 is a horizontal cross-sectional view of the fuselage shell of FIG. 1;

FIG. 4 is a front view of the fuselage housing of FIG. 1;

FIG. 5 is a cross-sectional view of the fuselage housing of FIG. 1;

FIG. 6 is a longitudinal cross-sectional view perpendicular to the direction of the coal wall at the midsection;

FIG. 7 is an enlarged view of the traction system of FIG. 2;

FIG. 8 is a longitudinal cross-sectional view through the axis of the traction motor;

FIG. 9 is an enlarged view of the electrical control system of FIG. 2

FIG. 10 is a cross-sectional view of the pump housing system;

figure 11 is a front view (left side) of the cutting system;

FIG. 12 is a cross-sectional view of FIG. 11;

FIG. 13 is a front view of the walking system;

FIG. 14 is a cross-sectional view of the step A-A of FIG. 13;

FIG. 15 is a cross-sectional view B-B of FIG. 13;

FIG. 16 is a front view of the guide shoe;

FIG. 17 is a longitudinal cross-sectional view of the support device taken parallel to the coal wall;

fig. 18 is a longitudinal sectional view of the supporting device perpendicular to the coal wall direction.

Reference numerals:

1. a body shell; 11. a rocker arm connecting lug; 12. the oil cylinder is connected with the lug; 13. the supporting device is provided with an interface structure; 14. the walking system is provided with an interface structure; 15. the pump box is connected with the interface structure; 16. a top surface of the middle section; 161. a front top surface of the middle section; 162. the middle top surface of the middle section; 163. the rear top surface of the middle section; 17. the bottom surface of the middle section; 171. the front bottom surface of the middle section; 172. the middle bottom surface of the middle section; 173. the rear bottom surface of the middle section; 18. a top surface of the walking support section; 181. the front top surface of the walking supporting section; 182. the middle top surface of the walking supporting section; 183. a rear top surface of the walking support section; 19. the bottom surface of the walking supporting section; 191. the front bottom surface of the walking supporting section; 192. the middle bottom surface of the walking supporting section; 193. the rear bottom surface of the walking supporting section;

2. a traction system; 21 a traction motor; 22. a high-speed section reduction mechanism; 23. a middle section speed reducing mechanism; 231. a tip gear assembly;

3. an electronic control system; 31. large and medium sized electrical components; 32. medium and small size electrical components; 33. an output wiring cavity; 34. a large part dismounting port; 35. a top disassembly port; 36. a cable access port; 37. a partition wall;

4. a cutting system; 41. a housing of the rocker arm; 411. the rocker arm shell is mainly connected with the lug; 412. the rocker arm shell oil cylinder connecting lug; 42. a first variable speed drive; 43. a second variable speed drive;

5. an oil cylinder;

6. a traveling system; 61. an integral drive wheel; 62. a traveling wheel assembly; 621. a bull gear; 622. a traveling wheel; 63. a running wheel axle; 64. a guide shoe; 641. a base; 642. an ear mount; 643. a recessed surface; 65. a connecting plate group; 66. a gland; 671. a thread block; 672. a screw; 68. positioning pins;

7. a pump box system; 71. a pump box; 712. an oil sump; 713. a walking box connecting hole; 714. a guide cover; 73. a pump motor; 74. a filter; 75. a pump hydraulic system;

8. a support device; 81. a support plate; 82. fastening screws; 83. a pin; 84. a slipper;

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

92. a scraper conveyor; 921. a track.

Detailed Description

The invention discloses a low-seam short-body coal mining machine, which comprises a cutting system 4, a machine body shell 1, a traction system 2 and an electric control system 3, wherein the traction system 2 and the electric control system are arranged in the machine body shell, as shown in figures 1 to 18. The electric control system is arranged in the middle, and the two sets of traction systems are respectively arranged on the left side and the right side of the electric control system. The electric control system and the two sets of traction systems are independent from each other in space, and therefore a plurality of cavities are formed in the body shell. The traction system is arranged in the space in which the traction system is arranged according to the sizes of all parts, generally, large and medium-sized parts, medium and small-sized parts of the traction system are mainly arranged at the front part, the middle part and the rear part of the machine body shell respectively, large and medium-sized electric parts of the electric control system are mainly arranged at the front part and the middle part of the machine body shell, and small and medium-sized electric parts of the electric control system are mainly arranged at the middle part and the rear part of the machine body shell. The height of the rear part of the machine body shell is not more than the middle part, and the height of the middle part is not more than the front part. The division of the front, middle and rear parts of the fuselage shell is determined with reference to the front-rear positional relationship of the shearer with the support top beam 91 and the scraper conveyor 92 when three machines are matched. Specifically, the area below the thick support beam 912 is designated as area a, the area below and forward extending to the rear edge of the drum of the thin support beam 911 is designated as area B, the area corresponding to the axial full length range of the drum is designated as area C, and the front part, the middle part and the rear part of the fuselage shell respectively correspond to the area C, the area B and the area a. Under the condition, parts with larger sizes in the traction system and the electric control system are arranged closer to the front, the parts with large and medium sizes are positioned in a C area closer to the coal wall side and are positioned between a left roller and a right roller, the parts with small and medium sizes are mainly arranged in a B area and below a support thin beam, and the parts with small sizes are mainly positioned in an A area and below a support thick beam. The overall structure of the machine body can keep enough gaps with a top plate, a bottom plate, a support top beam 91 and a scraper conveyor 92, so that the mining requirements of fluctuating top and bottom plates, coal gangue and the like are met, and smooth mining of ultra-thin or thin coal seams under complex conditions such as coal rocks and the like is ensured.

The traction system and the electric control system are integrally installed in the same machine body shell, and a conventional structure that split parts are connected is omitted, so that the machine body of the coal mining machine is shortened and narrowed, namely, the machine body of the coal mining machine is more compact, the adaptability of the corresponding coal mining machine to an undulating working surface is better, and the overall reliability is also ensured.

Not only the parts in the body shell are arranged according to the size, but also the height of the middle part and the rear part of the body shell (namely the thickness in the height direction) is designed to be smaller than the height of the front part, namely the part with smaller size of the part arranged inside is designed, the external size of the body shell is designed to be smaller, so that the body is more compact, and the larger gap between the body and the top beam and the scraper conveyor is more favorably kept.

The outside all is equipped with hydro-cylinder engaging lug 12 and rocking arm engaging lug 11 around the outside about the outer front portion of fuselage casing in proper order, the cutting system includes two left and right rocking arms and two left and right hydro-cylinders 5, and rocking arm casing main engaging lug 411 is passed through to the one end of rocking arm articulates in the rocking arm engaging lug 11 department that corresponds the side, and hydro-cylinder one end articulates on the hydro-cylinder engaging lug that corresponds the side, and the other end of hydro-cylinder articulates on the rocking arm casing hydro-cylinder engaging lug 412 that corresponds the rocking arm of side, and articulated axis extends around, and the hydro-cylinder is flexible to be driven and corresponds the rocking arm of side and swing in the vertical.

The cutting transmission system is arranged in the shell 41 of the rocker arm, and the arrangement positions of the large, medium and small parts of the cutting transmission system respectively correspond to the front part and the middle part of the shell of the machine body in the front-back direction.

The partition wall 37 is arranged between the high-voltage electric parts and the low-voltage electric parts in the machine body shell, and the partition wall is used for dividing and isolating the high voltage and the low voltage and is also used for dividing and isolating the large and medium-sized electric parts 31 and the medium and small-sized electric parts 32 because the size of the high-voltage electric parts is larger than that of the low-voltage electric parts. The front surface of the machine body shell can be further provided with a large part dismounting port 34, the top surface of the machine body shell is provided with a top part dismounting port 35, and the large part dismounting port and the top part dismounting port are both communicated with the space where the large and medium-sized electrical parts are located. The output wiring cavity 33 can also be arranged in the space where the large and medium-sized electric parts are located. The arrangement can greatly facilitate the maintenance of the electrical parts. The outer side walls of the chambers at the front side and the rear side of the partition wall can be respectively provided with a cable access port 36 so as to facilitate wiring.

The left end and the right end of the rear part of the machine body shell can also be provided with pump box connecting interface structures 15, an external independent pump box system 7 can be respectively installed through the interface structures, and the pump box system provides hydraulic pressure for the oil cylinder. The pump box system 7 is positioned in the space below the thick beam of the bracket. In this embodiment, the pump tank system 7 includes a pump tank 71, and a pump motor 73, a filter 74 and a pump hydraulic system 75 which are installed in the pump tank, and an oil sump 712 is provided in the pump tank. The pump tank system 7 is interchangeable between the left and right sides. The pump box 71 is provided with a connecting hole 713 and a guide cover 714 on the solid structure, and the connecting hole 713 can be used for installing and fixing a corresponding side traveling system. The pump box system can be installed in a left-right interchangeable mode, is compact in structure, simple and reliable in connection, convenient to disassemble and maintain, and does not occupy the space between the left roller and the right roller.

The cutting transmission system 4 may include a cutting motor, a first variable transmission mechanism 42, a second variable transmission mechanism 43, a speed reduction mechanism and a fixed-axis gear transmission mechanism, which are connected in sequence. The first and second variable transmission 42, 43 may allow for a greater range of speed of the cutting drive system. Because the two-stage variable speed transmission mechanism is adopted, the change range of the rotating speed is greatly expanded, and the parameter selection range of cutting materials with different hardness of the coal gangue is expanded.

The traction system 2 preferably comprises a high-speed section speed reducing mechanism 22, a middle section speed reducing mechanism 23 and a traction motor 21, wherein an output shaft of the traction motor is coaxially and fixedly connected with an input end of the high-speed section speed reducing mechanism, and an output end of the high-speed section speed reducing mechanism is coaxially and fixedly connected with an input end of the middle section speed reducing mechanism. The traction motor and the high-speed section speed reducing mechanism are arranged in front of and in the middle of the body shell respectively, so that the space occupation of the traction system in the left and right directions is reduced. The middle section speed reducing mechanism is mainly a middle and small-sized part and is arranged in the middle of the machine body shell, the output end of the middle section speed reducing mechanism is arranged on the outer side of the input end in the left-right direction, namely the output end of the middle section speed reducing mechanism of the left traction system is positioned on the left side of the input end, the output end of the middle section speed reducing mechanism of the right traction system is positioned on the right side of the input end, and compared with the mode that the traction system is integrally arranged in the front of the machine body shell, the occupation of the traction system on the space. Therefore, the length of the coal mining machine body in the left-right direction can be shorter, the distance between the two rollers can be shortened, and the adaptability of the thin seam coal mining machine to a fluctuating working surface is greatly improved.

The high-speed section speed reducing mechanism 22 preferably adopts a planetary mechanism, and further preferably adopts a compact planetary mechanism to keep a small axial size, ensure the strength and rigidity of a planetary wheel shaft and also help to reduce the front-back width size of the traction system. The compact planetary mechanism may include a primary planetary mechanism and a secondary planetary mechanism connected in series, which can provide a large reduction ratio, contributing to size reduction and life improvement of the intermediate-stage reduction mechanism.

The middle section speed reducing mechanism 23 is a dead axle transmission gear set, and comprises a head end gear assembly, a middle gear assembly and a tail end gear assembly 231 which are sequentially arranged in the left-right direction according to the transmission direction, wherein the transmission shafts of the gear assemblies 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. The intermediate gear assembly comprises a gear and a transmission shaft supporting the gear or a plurality of gears which are sequentially meshed for transmission and transmission shafts supporting the gears. Each transmission shaft corresponds to one mounting hole. Power is output to the travel system through the final gear assembly 231.

The number of transmission shafts contained in the intermediate gear assembly is increased or decreased, and the machine body shells with different lengths in the left and right directions are matched and replaced, so that the span between the left and right traveling systems can be adjusted. When the span between the left and right travelling wheels is properly increased, the overall stability of the coal mining machine can be improved, and the distance between the left and right rollers cannot be increased.

The tail end (also the rear end) of the rotating shaft of the head end gear assembly is provided with a large-torque braking mechanism, and the coal mining machine is braked by the large-torque braking mechanism after being stopped, so that the coal mining machine is prevented from sliding downwards when the working surface has a large inclination angle.

The traction system adopts a compact planetary mechanism with high speed grade and large reduction ratio and a traction motor to arrange parts with medium and large sizes in the space between the rollers of the coal mining machine and below the front of the bracket, so that enough effective gaps are reserved among the rollers, above and below the traction system and in front of the coal wall; meanwhile, a middle section speed reducing mechanism of the traction system arranges middle and small-sized parts below the thin top beam of the support, so that enough effective machine passing clearance is ensured above the coal mining machine.

And a traveling system mounting interface structure 14 is arranged at the rear part of the machine body shell and is used for connecting and mounting the traveling system 6. The left end and the right end of the traveling system mounting interface structure are preferably arranged at positions close to the left end and the right end of the machine body shell, namely, a larger span is kept as far as possible, so that the traveling stability of the coal mining machine is improved. The walking system comprises a walking box shell, driving wheels, a driving wheel shaft, a walking wheel assembly 62, a walking wheel shaft 63 and a guide sliding shoe 64. The walking box shell is fixed on the outer wall of the rear side of the machine body shell 1. 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 machine body 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 63 are rotatably supported on the front side wall and the rear side wall of the walking box shell respectively, a large gear 621 and a walking wheel 622 in the walking wheel assembly are coaxially and fixedly connected, and the walking wheel is coaxially mounted on the walking wheel shaft 63. The large gear 621 is externally engaged with the driving wheel. And the walking system is positioned in the space below the thick beam of the support.

The traveling system of the existing thin or ultra-thin coal seam mining machine only has one shaft, namely a driving wheel shaft in the invention, the front part of the driving wheel shaft is positioned in the machine body and is connected with a traction system of the mining machine to receive power from the traction system, and the rear part of the driving wheel shaft is positioned in the traveling system, and traveling wheels are directly installed on the driving wheel shaft. 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.

After the double-shaft-structure traveling system with the driving wheel shaft and the traveling wheel shaft is adopted, the traveling wheels are not arranged on the driving wheel shaft, but the driving wheels, the diameter of the driving wheels can be greatly reduced compared with the diameter of the traveling wheels due to the absence of the engagement requirement of the traveling wheels and the rails, so that the axis of the driving wheel shaft can be greatly moved upwards, the required machine body thickness is obviously reduced, and correspondingly, the coal passing height is obviously increased under the condition of the same machine face height, so that the problems of chain jamming of a scraper machine, increase of resistance of a coal mining machine, insufficient traction force and the like when the thin or extremely thin coal seam coal mining machine encounters large coal blocks, gangue and the like can be solved.

The guide shoe 64 includes a base 641 having a front side wall, a rear side wall, and a top plate connected between the tops of the front and rear side walls, with barbs provided at the bottom of either the front or rear side wall, and an ear mount 642 located above the base and generally midway along the left-right length. 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 barbs to form a guide groove extending left and right and used for being matched with the rail 921 on the scraper conveyor. 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 amount of movement relative to the walking box shell in the front-back direction, so that the guide sliding shoes have enough swinging space in the horizontal direction and the vertical direction.

The guide shoe is provided with a left and a right concave surfaces 643 which are concave towards the inside of the base, and the concave surfaces are positioned on at least one of the left and the right side surfaces of the ear seat, the left and the right top surfaces of the base which are separated by the ear seat, and the transition connection between the left and the right sides 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 power output by the middle section speed reducing mechanism is transmitted to the driving wheel shaft and then transmitted to the large gear by the driving wheel, the large gear 621 and the walking wheel 622 synchronously rotate, and finally the walking wheel 622 is meshed with the rail to roll and walk in the position limited by the frame opening of the guide sliding shoe 64. Road wheels 622, guide shoes 64, and rails cooperate to provide traction and guidance for the lower body traction system.

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 further 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 concave surface is at least provided with one, is positioned on the left side or the right side of the lug seat, but is preferably respectively provided with one on the left side and the right side, so that the same guide sliding shoe can be used for a left side walking system and a right side walking system of the coal mining machine. Further, the guide shoes are generally of a left-right symmetrical structure and are interchangeably installed when used on left and right travel boxes on a shearer loader.

The concave surface is preferably a straight cylindrical surface, the generatrices of which extend back and forth. In the assembled state, the drive axle is arranged close to the recessed surface. The radius of curvature of the concave surface is determined by the diameter of the driving axle and should generally be no less than the radius of the driving axle.

The arrangement of the concave surface ensures that a top plate or a guide groove close to the driving wheel shaft on one side in the left-right direction is positioned on the left or right outer side of the driving wheel shaft, and the sizes of the top plate and the guide groove have enough adjusting space and can not be limited by the driving wheel shaft. For example, the length of the guide groove can be appropriately increased, that is, the length of the corresponding wear-resistant layer is longer, so that the service life of the guide shoe can be improved to a certain extent, and particularly, the thickness of the top plate can be appropriately increased upwards, so that the overall strength of the guide shoe can be improved.

The ear holes are preferably waist-shaped holes which are wide left and right and narrow up and down, and are beneficial to providing required space for the horizontal swinging of the guide sliding shoes relative to the walking box shell.

The driving wheel and the driving wheel shaft are preferably of an integrated structure and can be called as an integrated driving wheel 61, 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. The large gear is meshed with the driving wheel with smaller diameter, so that the traveling mechanism has larger transmission ratio, the size of the related structure of the coal mining machine traction system serving as a preceding stage transmission system can be smaller, the service life of the related structure can be longer, and meanwhile, due to the adoption of multi-gear transmission of the driving wheel to the traveling wheel through the large gear, the service life of the gear can be greatly prolonged compared with the direct driving of the driving wheel to the traveling wheel.

The driving wheel shaft and the walking wheel shaft are rotatably supported on the walking box shell through bearings. The large gear is connected with the traveling wheel through a spline, and the large gear and the traveling wheel are fixed with each other in the axial direction.

Furthermore, the travelling wheel is sleeved on the travelling wheel shaft, the axial middle part of the travelling wheel is in splined connection with the travelling wheel shaft, and axial limit is not arranged between the axial middle part of the travelling wheel and the travelling 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.

In order to ensure the sufficient lubrication of the spline connection between the travelling wheel and the travelling wheel shaft, a front oil hole and a rear oil hole can be arranged in the travelling wheel shaft and/or the travelling wheel, the outward opening of the oil hole is arranged on the corresponding end surface of the travelling wheel shaft and/or the travelling wheel, and the front oil hole and the rear oil hole are respectively communicated with the spline connection from the front and the rear.

Due to the arrangement of the high-speed section speed reducing mechanism with a large speed reducing ratio, the size of the middle section speed reducing mechanism can be reduced, and correspondingly, the size of the integrated driving wheel can be reduced. The size of the integrated driving wheel and the size of the walking wheel are reduced, so that the height difference between the driving wheel shaft and the walking wheel shaft is further reduced, the walking box with a double-shaft structure is possible under the condition that the height of the machine face of the thin coal seam or extremely thin coal seam coal mining machine is very low, the service life of the walking mechanism is prolonged, and the problem of insufficient coal passing height under the machine body is solved well.

Compared with the existing walking box with a single-shaft structure, the walking box with the double-shaft structure has the advantages that the walking wheel can be smaller, the tooth profile can be the common involute tooth profile, the realization of the large enough coal passing height is facilitated, and the normal meshing of the walking system and the scraper conveyor track can be ensured.

The main body of the walking box can be formed by buckling and fixedly connecting the connecting plate group 65 and the pressing cover 66 in a front-back manner, and the connecting plate group and the pressing cover can be positioned by the positioning pin 68 and are matched and connected and fixed by the thread block 671 and the screw 672.

And the middle part of the body shell, which is close to the left end and the right end, is also respectively provided with a supporting device installation interface structure 13 for connecting and installing the supporting device 8. The supporting device is used as a main fixed support and supports the middle part of the fuselage shell in the front-back direction from the lower part. The supporting device comprises a supporting plate 81 and a sliding shoe 84, the upper part of the supporting plate is vertically inserted into a clamping groove at the bottom of the machine body shell and is fixed on the machine body shell through a fastening screw and the like, and the top surface and each side surface of the upper part of the supporting plate are attached to the corresponding surface of the clamping groove. The upper part of the shoe is hinged to the lower part of the support plate by a pin 83, the hinge axis extending forwards and backwards. The supporting device can be vertically and integrally detached, and is simple in structure and convenient to maintain. The left and right two-walking systems are preferably arranged at positions close to the left and right ends of the body casing, i.e. a large span is maintained as much as possible, so as to improve the walking stability of the shearer.

The fuselage casing can be divided into the interlude in the middle and be located the interlude and control the walking on both sides and support the section, in the full width range in the front and back direction, the top surface of interlude all is less than the top surface of walking support section, and the bottom surface of interlude all is higher than the bottom surface of walking support section, and the interlude compares the walking support section promptly, and is all bigger with the clearance between roof, bottom plate, back timber and the scraper conveyor, consequently can guarantee the adaptability of coal-winning machine to the condition of undulation better.

The top surface 16 of the middle section is divided into a middle section front top surface 161, a middle section middle top surface 162 and a middle section rear top surface 163 in the front-rear direction, and the heights of the three are sequentially reduced; the bottom surface 17 of the middle section is divided into a middle section front bottom surface 171, a middle section middle bottom surface 172 and a middle section rear bottom surface 173 in the front-rear direction, and the heights of the three are sequentially increased; the top surface 18 of the walking support section is divided into a walking support section front top surface 181, a walking support section middle top surface 182 and a walking support section rear top surface 183 in the front-rear direction, and the heights of the three are reduced in sequence; the bottom surface 19 of the walking support section is divided into a walking support section front bottom surface 191, a walking support section middle bottom surface 192 and a walking support section rear bottom surface 193 in the front-rear direction, and the heights of the three rise in sequence.

The middle section front top surface 161, the middle section front bottom surface 171, the walking support section front top surface 181, and the walking support section front bottom surface 191 correspond to the front portion of the body shell, upward correspond to the top plate, and downward correspond to the bottom plate. The middle section middle top surface 162, the middle section middle bottom surface 172, the walking support section middle top surface 182, and the walking support section middle bottom surface 192 correspond to the middle of the fuselage shell, upward correspond to the support thin beam, and downward correspond to the conveyor ledge. The middle section back top surface 163, the middle section back bottom surface 173, the walking support section back top surface 183, and the walking support section back bottom surface 193 correspond to the rear of the fuselage shell, upward correspond to the support thick beam, and downward correspond to the conveyor chute. The middle section back top surface 163 and the walking support section back top surface 183 are both inclined surfaces with a high front and a low rear, so that the distances between the front and the rear of the middle section back top surface 163 and the bracket top beam are kept almost equal, and a sufficient effective machine passing gap is ensured above the coal mining machine. The middle section rear bottom surface 173 and the walking support section rear bottom surface 193 are both concave surfaces with concave middle parts in the front-rear direction, so that a larger coal passing space is formed between the machine body shell and the chute of the scraper conveyor.

Claims (10)

1. The utility model provides a short fuselage coal-winning machine in thin coal seam which characterized in that: the cutting machine comprises a cutting system, a machine body shell, and a traction system and an electric control system which are arranged in the machine body shell, wherein the electric control system is arranged in the middle, the traction system is provided with two sets which are respectively arranged at the left side and the right side of the electric control system, the electric control system and the two sets of traction systems are respectively independent, large and medium-sized parts, medium and small-sized parts of the traction system are mainly arranged at the front part, the middle part and the rear part of the machine body shell respectively, the large and medium-sized electric parts of the electric control system are mainly arranged at the front part and the middle part of the machine body shell, the medium and small-sized electric parts of the electric control system are mainly arranged at the middle part and the rear part of the machine body shell, the height of the rear part of the machine body shell is not more than the middle part, oil cylinder connecting, the cutting system comprises a left rocker arm, a right rocker arm, a left oil cylinder and a right oil cylinder, one end of each rocker arm is hinged to the corresponding rocker arm connecting lug, one end of each oil cylinder is hinged to the corresponding oil cylinder connecting lug, the other end of each oil cylinder is hinged to the corresponding rocker arm, the hinge axis extends forwards and backwards, a cutting transmission system is arranged inside the shell of each rocker arm, and the cutting transmission system corresponds to the front part and the middle part of the shell of the machine body in the front-back direction of the arrangement position of large, medium and small-sized parts.

2. The short-body shearer for thin coal seams as claimed in claim 1, wherein: in the fuselage casing, be equipped with between high-voltage electrical spare part and the low-voltage electrical spare part and separate the wall, the preceding major possession dismouting mouth that is equipped with of fuselage casing, the top surface is equipped with top dismouting mouth, major possession dismouting mouth and top dismouting mouth all communicate with each other with the space of large and medium-sized electrical spare part place.

3. The short-body shearer for thin coal seams as claimed in claim 1, wherein: and pump box systems are respectively arranged on the outer sides of the left end and the right end of the rear part of the machine body shell, and provide hydraulic pressure for the oil cylinders.

4. The short-body shearer for thin coal seams as claimed in claim 1, wherein: the cutting transmission system comprises a cutting motor, a first variable transmission mechanism, a second variable transmission mechanism, a speed reduction mechanism and a fixed-shaft gear transmission mechanism which are connected in sequence.

5. The short-seam shearer of claim 1, 2, 3, or 4, wherein: the traction system comprises a high-speed section speed reducing mechanism, an intermediate section speed reducing mechanism and a traction motor, wherein an output shaft of the traction motor is coaxially and fixedly connected with an input end of the high-speed section speed reducing mechanism, an output end of the high-speed section speed reducing mechanism is coaxially and fixedly connected with an input end of the intermediate section speed reducing mechanism, the traction motor and the high-speed section speed reducing mechanism are respectively arranged at the front part and the middle part of the body shell, the intermediate section speed reducing mechanism is arranged at the middle part of the body shell, an output end of the intermediate section speed reducing mechanism is arranged at the outer side of the input end in the left-right direction.

6. The short-body shearer for thin coal seams as claimed in claim 5, wherein: the walking mechanism comprises a walking box shell, a driving wheel shaft, a walking wheel assembly, 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 machine body 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 penetrates through the machine body 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 are respectively rotatably supported on the front side wall and the rear side wall of the walking box shell, a large gear in the walking wheel assembly is coaxially and fixedly connected with a walking wheel, the walking wheel is coaxially arranged on the walking wheel shaft, the large gear is externally meshed with the driving wheel, the guide sliding shoe comprises a base and an ear seat positioned above the, 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, a guide groove extending leftwards and rightwards is respectively defined 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, the guide shoe 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 shoe, the axis of a walking wheel shaft is superposed with the central line of the ear hole, a left concave surface and a right concave surface which are concave towards the inside of the base are respectively arranged on the guide shoe, 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 positions of the left side, the driving wheel shaft in the left-right direction is positioned between the lug seat and one of the guide grooves.

7. The short-body shearer for thin coal seams as claimed in claim 6, wherein: the axial middle part of the travelling wheel is connected with a travelling wheel shaft through a spline, and two ends of the travelling wheel are in clearance fit with a shaft hole between the travelling wheel shaft.

8. The short seam shearer of claim 7, wherein: the supporting devices are respectively arranged at the middle part, close to the left end and the right end, of the machine body shell and comprise supporting plates and sliding shoes, the upper parts of the supporting plates are fixed at the bottom of the machine body shell, the upper parts of the sliding shoes are hinged with the lower parts of the supporting plates through pins, and the hinge axes extend forwards and backwards.

9. The short seam shearer of claim 1, 2, 3, 4, 5, 6, 7, or 8, wherein: the fuselage casing divide into the interlude in the middle and is located the walking on both sides about the interlude and supports the section, in the full width range in front and back direction, the top surface of interlude all is less than the top surface that the walking supported the section, and the bottom surface of interlude all is higher than the bottom surface that the walking supported the section.

10. The short-body shearer for thin coal seams as claimed in claim 9, wherein: the top surface of the middle section is divided into a middle section front top surface, a middle section middle top surface and a middle section rear top surface in the front-rear direction; the bottom surface of the middle section is divided into a middle section front bottom surface, a middle section middle bottom surface and a middle section rear bottom surface in the front-rear direction; the top surface of the walking support section is divided into a front top surface of the walking support section, a middle top surface of the walking support section and a rear top surface of the walking support section in the front-rear direction; the bottom surface of the walking support section is divided into a front bottom surface of the walking support section, a middle bottom surface of the walking support section and a rear bottom surface of the walking support section in the front-rear direction; the bottom surface is corresponding to the front portion of fuselage casing before top surface, bottom surface, walking support section before the interlude supports the section and the walking supports the section, top surface, bottom surface, walking support section in the middle of the interlude support the middle of section middle bottom surface corresponding to the middle part of fuselage casing, top surface behind top surface, interlude, walking support section back top surface and walking support section back bottom surface are corresponding to the rear portion of fuselage casing behind the interlude, and top surface and walking support section back top surface are the low inclined plane in preceding height after the interlude, and bottom surface and walking support section back bottom surface are the concave surface of middle part indent in the preceding rear direction behind the interlude.

Images