CN111411957B - Traction system of thin seam shearer - Google Patents
Traction system of thin seam shearer Download PDFInfo
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- CN111411957B CN111411957B CN202010444373.3A CN202010444373A CN111411957B CN 111411957 B CN111411957 B CN 111411957B CN 202010444373 A CN202010444373 A CN 202010444373A CN 111411957 B CN111411957 B CN 111411957B
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C29/00—Propulsion of machines for slitting or completely freeing the mineral from the seam
- E21C29/22—Propulsion of machines for slitting or completely freeing the mineral from the seam by wheels, endless tracks or the like
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C35/00—Details of, or accessories for, machines for slitting or completely freeing the mineral from the seam, not provided for in groups E21C25/00 - E21C33/00, E21C37/00 or E21C39/00
- E21C35/08—Guiding the machine
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- Mechanical Engineering (AREA)
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- General Life Sciences & Earth Sciences (AREA)
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Abstract
本发明涉及一种薄煤层采煤机牵引系统，包括牵引壳体、高速段减速机构、中间段减速机构和牵引电机，所述牵引壳体呈L形，包括前后延伸段和左右延伸段，所述牵引电机和高速段减速机构布置在所述前后延伸段内，所述中间段减速机构布置在所述左右延伸段内，所述牵引电机的输出轴同轴固定连接所述高速段减速机构的输入端，所述高速段减速机构的输出端同轴固定连接所述中间段减速机构的输入端，所述中间段减速机构的输出端相比输入端更靠近所述左右延伸段的远离前后延伸段的端部。本发明能使大功率低采高的薄或极薄煤层采煤机在同等机面高度的情况下得到更大的过煤高度，同时解决现有的悬机身方式下的牵引阻力大、导向装置磨损加剧等问题。
The present invention relates to a traction system for a thin coal seam coal mining machine, comprising a traction housing, a high-speed section reduction mechanism, an intermediate section reduction mechanism and a traction motor, wherein the traction housing is L-shaped, comprising a front and rear extension section and a left and right extension section, the traction motor and the high-speed section reduction mechanism are arranged in the front and rear extension sections, the intermediate section reduction mechanism is arranged in the left and right extension sections, the output shaft of the traction motor is coaxially fixedly connected to the input end of the high-speed section reduction mechanism, the output end of the high-speed section reduction mechanism is coaxially fixedly connected to the input end of the intermediate section reduction mechanism, and the output end of the intermediate section reduction mechanism is closer to the ends of the left and right extension sections away from the front and rear extension sections than the input end. The present invention enables a high-power, low-mining-height thin or ultra-thin coal seam coal mining machine to obtain a larger coal passing height under the condition of the same machine face height, and at the same time solves the problems of large traction resistance and aggravated wear of the guide device under the existing suspended body mode.
Description
Technical Field
The invention relates to a traction system of a coal mining machine, in particular to a low-fuselage high-power coal mining machine suitable for mining thin or extremely thin coal seam.
Background
For mining of thin or ultra-thin coal seam, the machine body of the thin or ultra-thin coal seam coal mining machine is required to be shorter and shorter, but on the other hand, in order to adapt to mining of complex geological conditions such as coexistence of coal and rock, the installed power is required to be larger, and along with the increase of the power, the sizes of a motor, a transmission system and the like are also correspondingly increased greatly, and the requirements of the machine body to be shorter and shorter are a pair of contradiction, so that the structural design of the thin or ultra-thin coal seam coal mining machine is a difficult point. One of the outstanding problems is that the coal passing height below the machine body and above the scraper conveyor is small, and when massive coal, gangue and the like are encountered, the chain of the scraper conveyor, the resistance of the coal mining machine and the like can be greatly increased, and the effective traction force is insufficient.
Technical solutions for moving large and medium-sized components such as motors and transmission gears forward from above the original scraper conveyor to the side close to the coal wall have been proposed and gradually used in the industry, namely, a suspension machine body is adopted to solve the problem of arrangement of the large and medium-sized components, and the suspension machine body is beneficial to reducing the height of the machine body, but the problem of small coal passing height cannot be solved generally. In addition, the complex traction system occupies a long distance in the left-right direction of one side close to the coal wall, and the arrangement of the cutting system of the coal mining machine leads to a long span between the two rollers, so that the adaptability of the coal mining machine to complex geological conditions is greatly reduced, and the problems of blocking, coal extrusion, large traction resistance and the like are easy to occur. In addition, the structure of the suspension body also easily causes the gravity center of the body to deviate to the coal wall side, so that the abrasion of the coal cutter guide device far from the coal wall side is increased.
Disclosure of Invention
The invention aims to provide a traction system of a low-seam coal mining machine, which can enable a high-power low-mining-height thin or ultra-low-seam coal mining machine to obtain larger coal passing height under the condition of the same plane height, and simultaneously solves the problems of large traction resistance, aggravation of guide device abrasion and the like in the existing suspension machine body mode.
The main technical scheme of the invention is as follows:
the utility model provides a thin seam coal-winning machine traction system, includes traction housing, high-speed section reducing mechanism, interlude reducing mechanism and traction motor, traction housing is L shape, including front and back extension and control extension, traction motor and high-speed section reducing mechanism arrange in the front and back extension, interlude reducing mechanism arranges in the control extension, traction motor's the coaxial fixed connection of output shaft high-speed section reducing mechanism's input, the coaxial fixed connection of high-speed section reducing mechanism's output interlude reducing mechanism's input, interlude reducing mechanism's output compares the input more near control extension's the tip of keeping away from front and back extension.
The high-speed section speed reducing mechanism preferably adopts a compact planetary mechanism.
The middle section reducing mechanism is a fixed-shaft transmission gear set, and comprises a head end gear assembly, a middle gear assembly and a tail end gear assembly which are sequentially arranged according to a transmission direction, wherein each shaft is arranged in parallel, the input end of the head end gear assembly is fixedly connected with the output end of the high-speed section reducing mechanism coaxially, and one or more transmission shafts can be contained in the middle gear assembly.
The left and right extension sections preferably only reserve necessary installation space and necessary process holes of the intermediate gear assembly, and the rest are made into a solid body.
The thickness of the left and right extending sections is smaller than that of the front and rear extending sections, and the middle and rear sections of the bottom surfaces of the left and right extending sections are preferably concave surfaces with the middle parts concave in the front and rear directions.
The middle and rear sections of the top surfaces of the left and right extension sections are preferably provided with inclined surfaces with high front and low rear.
The traction system of the thin seam coal mining machine further comprises a traveling mechanism, the traveling mechanism comprises 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 traction shell, the front end of the driving wheel shaft is fixedly connected with the output end of the middle section speed reducing mechanism in a coaxial manner, the driving wheel shaft penetrates through the traction 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, the 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 the traveling wheel, the large gear is externally meshed 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, barbs are arranged at the bottoms of the front side wall or the rear side wall, a left guide groove and a right guide groove which extend leftwards and rightwards 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, the guide sliding shoe is arranged at the lower part of the walking box and is in swing connection with the walking box shell through an earhole on an ear seat of the guide sliding shoe, the axis of a walking wheel shaft coincides with the central line of the earhole, concave surfaces which are concaved inwards of the base are arranged at the left side and the right side of the ear seat, the left top surface and the right top surface of the base which are separated by the ear seat and at least one position of transitional joints of the left side and the right side of the ear seat and the top surface of the base, the driving wheel shaft is arranged close to the concave surface in the radial direction, and the driving wheel shaft is positioned between the ear seat and one of the guide grooves in the left-right direction.
Further, the axial middle part of the travelling wheel is in spline connection with the travelling wheel shaft, and the two ends of the travelling wheel are in clearance fit with the shaft hole between the travelling wheel and the travelling wheel shaft.
The drive wheel and the drive axle are preferably of unitary construction.
The driving wheel shaft and the traveling wheel shaft are rotatably supported on the traveling box shell through bearings, the large gear can be connected with the traveling wheel through a spline, the driving wheel shaft and the traveling wheel shaft are mutually fixed in the axial direction, and the traveling wheel shaft is sleeved with the traveling wheel shaft and connected with the traveling wheel shaft through a spline.
The beneficial effects of the invention are as follows:
the large and medium-sized traction motor and the high-speed section speed reducing mechanism are arranged on the side close to the coal wall and are positioned between the left roller and the right roller and in a space below the front of the coal cutter bracket, the medium and small-sized middle section speed reducing mechanism is arranged above the scraper conveyor and below the thin beam at the front end of the top beam of the coal cutter bracket, and when the height of the machine body is reduced, the sufficient gaps between the upper part, the lower part and the front close to the coal wall of the traction part between the rollers are ensured.
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-right direction is reduced. Because the traction shell is L-shaped, one part of the traction shell is arranged above the scraper conveyor, and the other part of the traction shell is arranged to overhang towards the coal wall side, the occupation of the space between the left roller and the right roller by the traction system 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 low seam mining machine to the undulating working surface is greatly improved.
The adoption of the compact planetary mechanism can provide a large reduction ratio, not only can improve the rigidity and strength of a planetary wheel shaft of the planetary mechanism, but also is beneficial to reducing the size of the middle section speed reducing mechanism and prolonging the service life of the middle section speed reducing mechanism, and correspondingly, the size of an integrated driving wheel connected with the output end of the middle section speed reducing mechanism can be smaller, so that the height difference between a walking wheel shaft and the driving wheel shaft is beneficial to shortening, and further, the height of a machine surface is beneficial to reducing or increasing the coal passing height.
The number of the transmission shafts contained in the intermediate gear assembly is increased or decreased, and then the traction shells of the left and right extension sections with different lengths in the left and right directions are matched and replaced, so that the span between the left and right travelling wheels can be adjusted. When the span between the left travelling wheel and the right travelling wheel is properly increased, the overall stability of the coal mining machine can be improved. Due to the L-shaped structure of the traction housing and the arrangement position of the traction housing relative to the machine body, the distance between the left roller and the right roller is not increased while the span of the travelling wheel is increased.
The left and right extension sections are designed according to the internal cavity minimization principle, only the necessary installation space and necessary processing technology holes of the intermediate gear assembly, related parts and the like are reserved, and other parts are made into a solid body, so that the gravity center of the whole coal mining machine can be moved to the mining side, the running balance of the coal mining machine is maintained, and the abrasion of the guiding device is reduced.
The middle and rear sections of the bottom surfaces of the left and right extension sections are arranged to be concave surfaces with the middle parts concave in the front-rear direction, the middle and rear sections of the top surfaces are arranged to be inclined surfaces with the front parts high and the rear parts low, and the inclination angles of the inclined surfaces are parallel or nearly parallel to the inclined surfaces of the top beam bottoms of the coal cutter brackets, so that the left and right extension sections are beneficial to ensuring enough safety distances between the scraper conveyors and the coal cutter brackets. Meanwhile, the front and rear extension sections and the top plate, the bottom plate and the coal wall are provided with enough safety distances, so that the adaptability of the thin seam coal mining machine to the working surface under the fluctuating condition can be improved.
Because the left side and/or the right side of the lug seat of the guide slipper are provided with the concave surfaces, the installation position of the driving wheel shaft is closer to the walking wheel shaft, so that the fall of the driving wheel shaft and the walking wheel shaft in the height direction can be very small, and under the condition that the height of the machine face of the coal mining machine is unchanged, the coal passing height below the machine body and above the scraper conveyor can be greatly increased, thereby solving the problems that the thin or ultra-thin coal seam coal mining machine is blocked by a scraper machine chain such as massive coal and gangue, the resistance of the coal mining machine is increased, the effective traction force is insufficient and the like.
The diameter of the wheel shaft and the gear part of the driving wheel can be smaller by adopting the integral driving wheel, and the mounting mode between the travelling wheel and the travelling wheel shaft also determines the diameter of the travelling wheel to be smaller, so that the travelling box with the double-shaft structure on the thin or ultra-thin coal seam coal mining machine is possible, the realization of a large enough coal passing height or a lower machine surface height is facilitated, and the normal engagement of a travelling system and a scraper conveyor rail can be ensured. And because the driving wheel is adopted to pass through the large gear and then to the multi-gear transmission of the travelling wheel, compared with the direct driving of the driving wheel to the travelling wheel, the service life of the gear can be greatly prolonged.
Drawings
FIG. 1 is a horizontal cross-sectional view (left side traction system) of one embodiment of the present invention;
FIG. 2 is a vertical section three-machine cross-section of one embodiment of the invention;
FIG. 3 is a schematic diagram of an embodiment of the present invention in an arrangement position of a shearer loader (with left and right side haulage systems);
FIG. 4 is a partial view of FIG. 1;
FIG. 5 is another vertical section three-machine cross-section of one embodiment of the invention;
FIG. 6 is a front view of one embodiment of a left side travel mechanism;
FIG. 7 is a step-a cross-sectional view of FIG. 6;
FIG. 8 is a front view of the guide shoe of FIG. 6;
FIG. 9 is a cross-sectional view of C-C of FIG. 8;
fig. 10 is a top view of fig. 8.
Reference numerals:
1. Traction housing 13, cable channel 171, horizontal surface 172, incline 18, concave surface;
2. a high-speed section speed reducing mechanism, a first-stage planetary mechanism and a second-stage planetary mechanism;
3. A middle section speed reducing mechanism, 31, a head end gear assembly, 32, a middle gear assembly, 33, a tail end gear assembly;
4. A traction motor;
5. A high torque braking mechanism;
6. the walking mechanism comprises a walking mechanism body 61, an integrated driving wheel 62, a large gear 63, a walking wheel 64, a guide sliding shoe 641, a base 642, an ear seat 643, a concave surface 65, a walking box shell 66 and a walking wheel shaft;
91. The support is 911, the top beam bottom inclined plane is 912, the top beam bottom thin plane is formed;
92. scraper conveyor 921, middle plate 922, ledge 923, scraper conveyor groove 924, track;
93. a middle frame;
94. a coal cutter and 941, a roller.
Detailed Description
The invention discloses a traction system (which can be simply called as traction system) of a low seam mining machine, which is shown in figures 1-10 and comprises a traction shell 1, a high-speed section speed reduction mechanism 2, a middle section speed reduction mechanism 3 and a traction motor 4. The traction shell is L-shaped and comprises a front extension section, a rear extension section, a left extension section and a right extension section, the traction motor and the high-speed section speed reducing mechanism are arranged in the front extension section, the rear extension section and the left extension section, and the middle section speed reducing mechanism is 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 extension sections, of the left and right extension sections than the input end. When the traction system is installed on the coal mining machine, the left side and the right side of the front and the rear extension sections are connected between the coal mining machine cutting device 94 and the middle frame 93 of the coal mining machine, the left and the right extension sections are arranged above the scraper conveyor 92 and below the coal mining machine support 91, the front and the rear extension sections overhang towards the coal wall side, and the output shaft of the traction motor extends towards the mining side.
The traction motor and the high-speed section speed reducing mechanism are large and medium-sized parts, the middle section speed reducing mechanism is mainly a medium and small-sized part, the traction motor and the high-speed section speed reducing mechanism are close to the side of the coal wall and are positioned between the left roller 941 and the right roller 941 and in a space below the front side (namely close to the side of the coal wall) of the coal cutter bracket 91, the middle section speed reducing mechanism is arranged above the scraper conveyor and below the thin beam at the front end of the top beam of the coal cutter bracket, and when the height of the machine body is reduced, the upper part, the lower part of the traction part between the rollers and the front side close to the coal wall are ensured to have enough effective top plate, bottom plate and coal wall gaps.
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-right direction is reduced. And the traction shell is L-shaped, one part of the traction shell is arranged above the scraper conveyor, and the other part of the traction shell is arranged to overhang towards the coal wall side, so that the occupation of the space between the left roller and the right roller by the traction system 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 low seam mining machine to the undulating working surface is greatly improved.
The high-speed section speed reducing mechanism preferably adopts a compact planetary mechanism so as to keep a small axial dimension, ensure the strength and rigidity of a planetary wheel shaft and also help reduce the front-rear dimension of the traction system.
The compact planetary mechanism includes a primary planetary mechanism 21 and a secondary planetary mechanism 22 connected in series, and is capable of providing a large reduction ratio, contributing to the reduction in size and the increase in life of the intermediate-stage reduction mechanism.
The middle section reducing mechanism is a multi-shaft fixed-shaft transmission gear set, and comprises a head end gear assembly 31, a middle gear assembly 32 and a tail end gear assembly 33 which are sequentially arranged according to the transmission direction, wherein each shaft is arranged in parallel, and the input end of the head end gear assembly is fixedly connected with the output end of the high-speed section reducing mechanism in a coaxial manner. In the left and right extension sections, each transmission shaft in the middle section speed reducing mechanism corresponds to a mounting hole.
One or more drive shafts may be included in the intermediate gear assembly. The number of the transmission shafts contained in the intermediate gear assembly is increased or decreased, and then the traction shells of the left and right extension sections with different lengths in the left and right directions are matched and replaced, so that the span between the left and right travelling wheels can be adjusted. When the span between the left travelling wheel and the right travelling wheel is properly increased, the overall stability of the coal mining machine can be improved. Due to the L-shaped structure of the traction housing and the arrangement position of the traction housing relative to the machine body, the distance between the left roller and the right roller is not increased while the span of the travelling wheel is 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 5, and the large-torque braking mechanism is used for braking after the coal mining machine is stopped, so that the coal mining machine is prevented from sliding down when the working face is at a large inclination angle.
In front of the traction motor 4 in the traction housing 1 is a cable channel 13 for providing a threading space. The traction shell is also provided with a connecting hole for installing the travelling mechanism.
The left and right extension sections are designed according to the internal cavity minimization principle, only the necessary installation space and necessary processing technology holes of the intermediate gear assembly, related parts and the like are reserved, and other parts are made into a solid body, so that the gravity center of the whole coal mining machine can be moved to the mining side, the running balance of the coal mining machine is maintained, and the abrasion of the guiding device is reduced.
The thickness of the left and right extending sections is smaller than that of the front and rear extending sections. The front sections of the bottom surfaces of the left and right extension sections are provided as horizontal surfaces, and the middle and rear sections of the bottom surfaces of the left and right extension sections are provided as concave surfaces 18 whose middle parts are concave in the front-rear direction, so that a sufficient coal passing gap can be maintained between the traction housing 1 and the middle plate 921 of the scraper conveyor 92.
The front sections of the top surfaces of the left and right extending sections are arranged to be horizontal planes 171, the middle and rear sections of the top surfaces of the left and right extending sections are arranged to be inclined planes 172 with high front and low rear, the inclined angles of the inclined planes 172 are preferably parallel or nearly parallel to the top beam bottom inclined planes 911 of the coal cutter support 91, and the horizontal planes 171 and the inclined planes 172 are respectively kept equidistant from the front horizontal top beam bottom thin planes 912 of the coal cutter support 91 and the top beam bottom inclined planes 911 with most inclined rear surfaces as far as possible, so that the sufficient effective passing clearance is ensured above the coal cutter.
It can be seen that the safety distance 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 coal cutter bracket and the scraper conveyor (comprising the ledge 922) is enough, so that the top plate clearance, the bottom plate clearance, the coal wall clearance and the passing clearance are ensured, and the adaptability of the low seam coal cutter to the fluctuating condition working surface is improved.
In addition, the shearer loader traction system may also include a running gear 6 that includes a running box housing 65, drive wheels, drive axles, a running wheel assembly, a running axle 66, and a guide shoe 64. The traveling case housing 65 is fixed to rear side outer walls of the left and right extending sections of the traction housing 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 backwards penetrates through the traction shell and the walking box shell 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. The two ends of the traveling wheel shaft 66 are respectively rotatably supported on the front and rear side walls of the traveling case housing 65, the large gear 62 in the traveling wheel assembly is fixedly connected with the traveling wheel 63 coaxially, and the traveling wheel is coaxially mounted on the traveling wheel shaft 66. The large gear 62 is externally engaged with the drive wheel.
The guide shoe 64 includes a base 641 including a front side wall, a rear side wall, and a top plate connected between the tops of the front and rear side walls, the bottom of the front side wall or the rear side wall being provided with barbs, and an ear seat 642 positioned at the middle of the base in the left-right length direction. 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 left and right extending guide groove for being matched with the rail 924. The rear surface of the front side wall, the bottom surface of the top plate and the front surface of the rear side wall and the top surface of the barb are all provided with wear layers. The guide sliding shoes are arranged at the lower part of the walking box shell and are connected with the walking box shell in a swinging way through the earholes on the earseats. In an ideal state, the axis of the walking wheel shaft coincides with the central line of the earhole. The guide sliding shoes can have small amount of serial quantity relative to the walking box shell in the front-back direction, so that the guide sliding shoes have enough swinging space in the horizontal and vertical directions.
The guide shoe is provided with a concave surface 643 which is concave towards the inside of the base at the left and right positions, and the concave surface is positioned on at least one of the left and right side surfaces of the ear seat, the left and right top surfaces of the base which are separated by the ear seat, and the transitional connection position between the left and 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 arranged as close to the recessed surface as possible in the radial direction, the drive axle being located between the ear mount and one of the guide grooves in the left-right direction.
The power output by the intermediate speed reducing mechanism is transmitted to the driving wheel shaft, and then transmitted to the large gear by the driving wheel, the large gear 62 rotates synchronously with the travelling wheel 63, and finally the travelling wheel 63 rolls in a meshing manner with the rail 924 in a position defined by the frame opening of the guide sliding shoe 64. The rail 924 is located within the scraper conveyor groove 923. The road wheels 63, guide shoes 64 and rails 924 cooperate to provide traction and guidance for the low fuselage traction system.
Providing the recessed surface may allow room for the drive wheel axle to be mounted radially closer to the running axle. The driving wheel shaft and the traveling wheel shaft are installed close to each other, the fall of the driving wheel shaft and the traveling wheel shaft in the height direction can be greatly reduced, and under the condition that the height of the machine surface of the coal mining machine body is unchanged, the coal passing height below the machine body and above the scraper conveyor can be greatly increased, so that the problems that the thin or ultra-thin coal seam coal mining machine is blocked by a scraper machine such as massive coal and gangue, the resistance of the coal mining machine is increased, the effective traction force is insufficient and the like can be solved.
At least one concave surface is arranged on the left side or the right side of the ear seat, but one concave surface is arranged on the left side or the right side of the ear seat, so that the same guide sliding shoe can be used for a left side traveling system and a right side traveling system of the coal mining machine. Further, the guide shoes are generally of a bilateral symmetry and can be interchangeably mounted when used on left and right traveling cases on a shearer.
The concave surface is preferably a straight cylindrical surface, the generatrix of which extends back and forth. In the assembled state, the drive axle is arranged adjacent to the recessed surface. The radius of curvature of the concave surface is determined by the diameter of the drive axle and should generally not be less than the radius of the drive axle.
Because the driving wheel shaft can be arranged closer to the travelling wheel, the driving wheel shaft occupies a part of space of the guide sliding shoe in the left-right direction in the installation state, so that the total length of the guide sliding shoe is longer, the guide groove is positioned at the left or right outer side of the driving wheel shaft, the length can be properly prolonged, and the length of the corresponding wear-resisting layer is longer, so that the service life of the guide sliding shoe can be prolonged to a certain extent.
The earhole is preferably a waist-shaped hole with wide left and right and narrow upper and lower parts, which is beneficial to providing the required space for the horizontal swing of the guide sliding shoe relative to the walking box shell.
The drive wheel and drive axle are preferably of unitary construction, and may be referred to as unitary drive wheel 61, and the diameters of the axle and gear portions may be smaller than in the case of a split construction, the machine face height may be set lower, while also having a greater underframe coal height. In the case of a constant machine face height, the coal passing height can be further increased. The large gear is meshed with the driving wheel with smaller diameter, so that the travelling mechanism has larger transmission ratio, the size of the related structure of the traction system of the coal mining machine serving as a front-stage transmission system can be smaller, the service life of the related structure can be longer, and meanwhile, the service life of the gear can be greatly prolonged compared with that of the direct driving of the driving wheel to the travelling wheel due to the adoption of multi-gear transmission of the driving wheel to the travelling wheel through the large gear.
The driving wheel shaft and the traveling wheel shaft are rotatably supported on the traveling box shell through bearings. The large gear is connected with the travelling wheel through a spline, and the large gear and the travelling wheel are mutually fixed in the axial direction. The travelling wheel is sleeved on the travelling wheel shaft, the axial middle part of the travelling wheel is in spline connection with the travelling wheel shaft, and no axial limit is arranged between the travelling wheel and the travelling wheel shaft. The two ends of the travelling wheel are in clearance fit with the shaft holes between the travelling wheel shafts, and the travelling wheel can axially and flexibly slide along the travelling wheel shafts, so that the adaptability of the travelling wheel to a track can be improved. After the travelling wheel and the travelling wheel shaft adopt the connecting structure, the diameter of the travelling wheel can be set smaller, so that the lower machine surface height and better adaptability can be kept.
In order to ensure the full 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 external 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 front and 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 accordingly, the size of the integral driving wheel can be reduced. The size of the integral driving wheel and the size of the travelling wheel are reduced, the height drop of the driving wheel shaft and the travelling wheel shaft is further reduced, the travelling box adopting the double-shaft structure becomes possible under the condition that the height of the machine face of the thin coal seam or the ultra-thin coal seam coal mining machine is very low, the service life of the travelling mechanism is prolonged, and finally the problem of insufficient coal passing height under the machine body is well solved.
The invention forms the walking box with double-shaft structure (comprising the driving wheel shaft and the walking wheel shaft), compared with the existing walking box with single-shaft structure (only the driving wheel shaft is provided with the walking wheel directly), the walking wheel can be smaller, the tooth profile can be the common involute tooth profile, the invention is beneficial to realizing the large enough coal passing height, and the normal engagement of the walking system and the scraper conveyor track can be ensured.
Claims (10)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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| CN201763333U (en) * | 2010-09-19 | 2011-03-16 | 贵州乐采机电科技有限公司 | Electric traction shearer for ultra thin coal seam |
| CN202926325U (en) * | 2012-11-10 | 2013-05-08 | 山东先河悦新机电股份有限公司 | Alternative-current traction coal mining machine of thin coal seam |
| PL222665B1 (en) * | 2013-06-24 | 2016-08-31 | Kopex Machinery Spółka Akcyjna | The mechanism of foundation of the device for mining and loading in low seams |
| CN104358569A (en) * | 2014-09-17 | 2015-02-18 | 三一重型装备有限公司 | Coal cutter and travel unit's transmission mechanism |
| CN105484748A (en) * | 2015-12-24 | 2016-04-13 | 林州重机集团股份有限公司 | Coal cutter walking device |
| CN108952705A (en) * | 2018-08-24 | 2018-12-07 | 江苏中机矿山设备有限公司 | A kind of hard girdle lump coal coalcutter and coal-mining method |
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| CN101158385A (en) * | 2006-10-05 | 2008-04-09 | 住友重机械工业株式会社 | Gear power transmission device |
| CN110630258A (en) * | 2019-10-22 | 2019-12-31 | 西安煤矿机械有限公司 | Traction box of thin coal seam coal mining machine |
| CN212563218U (en) * | 2020-05-22 | 2021-02-19 | 天地科技股份有限公司上海分公司 | Traction system of thin coal seam coal mining machine |
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