Thin seam coal cutter, cutting device and method of forming same

Abstract

The application discloses a thin seam coal mining machine, a cutting device and a forming method thereof. The cutting device comprises a pair of cutting parts arranged on the left and right sides of the machine body of the coal mining machine; a driving mechanism installed in the middle of the machine body and used for simultaneously providing driving force for the power input shafts of the pair of cutting parts; wherein each cutting part is hinged between the machine body box and the driving mechanism box through a joint bearing and hinged between the driving mechanism box through a height adjusting oil cylinder; when the height adjusting oil cylinder is extended and retracted, the cutting part is swung around the center line of the joint bearing to adjust the height of the cutting drum coal mining. The length, width and height of the cutting device are relatively short, the space occupancy is greatly reduced, the cutting device can be adapted to the roadway with small mining width and poor conditions, the thin seam mining efficiency is improved, the height of the cutting drum is easy to adjust, the cutting device can be better adapted to the coal mining height, and the thin seam is favorably vertically cut.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of heading machine, in particular to a thin coal seam coal mining machine, a cutting device of the thin coal seam coal mining machine and a forming method thereof. BACKGROUND

[0002] The thin coal seam resources in China are rich, widely distributed and good in quality. The thin coal seam refers to the coal seam with a thickness less than 1.3 meters. The thin coal seam mechanized mining has achieved certain results through years of development. However, the geological conditions of the thin coal seam in most coal mines are relatively complex, and the coal seam often has faults, stone inclusions and other structures. In order to ensure the advance of the fully mechanized coal mining face, the coal mining machine often needs to withstand adverse working conditions such as top cutting and bottom breaking. Therefore, the thin coal seam coal mining machine is required to have large cutting power and the ability to pass through faults, cut stone inclusions, break tops and cut bottoms.

[0003] Most of the existing technology cutting parts of the coal mining machine adopt one cutting head and one reduction box, adopt multi-stage gear or planetary gear box transmission, and are provided with a rocker arm at the end. The cutting head is arranged on the rocker arm. The coal mining machine with the above-mentioned structure cutting part has the problems of large space occupation, large overall length, complex structure, large maintenance difficulty, poor reliability and poor safety maintenance.

[0004] In addition, the existing technology also has a coal mining machine cutting part adopting two cutting heads, such as the structure disclosed in the thin coal seam mining system cutting part with the application number CN201811479056.4. The cutting part includes two cutting head assemblies arranged on the same coal mining and transportation machine groove and facing the same direction, a power mechanism in transmission connection with the cutting head assemblies and providing power. The power structure is a double-shaft motor arranged between the two cutting head assemblies and in transmission connection with the two cutting head assemblies. The lower part of the cutting head assembly is in sliding connection with the coal mining and transportation machine groove through the chain traction slide rail and the guide slide rail. However, the chain traction slide rail and the guide slide rail of the same cutting head assembly need to be replaced at the same time when the height of the cutting head assembly is adjusted. The adjustment is not variable, the maintenance is poor, and the length dimension of the cutting head assembly along the advancing direction of the coal mining machine is still large after the connection with the double-shaft motor, so that the space occupation is large, the overall length is long, and it is not conducive to the vertical tooling mining of the thin coal seam. SUMMARY

[0005] The present application aims to solve the above-mentioned problems, and provides a thin coal seam coal mining machine, a cutting device and a forming method thereof. The length, width and height of the cutting device are relatively short, the space occupation rate is greatly reduced, the roadway with small mining width and poor conditions can be adapted, the thin coal seam mining efficiency is improved, the cutting drum height is easy to adjust, the coal mining height can be better adapted, and the vertical tooling mining of the thin coal seam is facilitated.

[0006] To achieve the above object, the present application provides a thin coal seam cutting device of a coal mining machine, comprising: a pair of cutting parts arranged on the left and right sides of the coal mining machine body; a driving mechanism installed in the middle of the machine body and used for simultaneously providing driving force for the power input shafts of the pair of cutting parts; wherein each of the cutting parts is hinged between the machine body box and the driving mechanism box through a joint bearing and is hinged between the driving mechanism box and the machine body box through a height adjustment oil cylinder; and when the height adjustment oil cylinder is extended or retracted, the cutting part is swung around the center line of the joint bearing to adjust the cutting drum coal mining height.

[0007] Preferably, the cutting part shell comprises: a first shell in which the power input shaft is arranged; and a second shell with a side wall integrally connected with the side wall of the first shell; wherein the first shell is hinged with the machine body box through the joint bearing, and the second shell is hinged with the driving mechanism box through the height adjustment oil cylinder.

[0008] Further, the cutting part further comprises a power transmission mechanism for transmitting the power input by the power input shaft to the cutting drum, which comprises: a gear transmission mechanism with the power input shaft; and a double planetary reduction mechanism in transmission connection with the power output wheel of the gear transmission mechanism; wherein the double planetary reduction mechanism transmits the power to the drum connecting disc to drive the cutting drum installed on the drum connecting disc to rotate and mine coal.

[0009] Preferably, the double planetary reduction mechanism comprises a primary planetary reduction mechanism in transmission connection with the gear transmission mechanism and a secondary planetary reduction mechanism in transmission connection with the primary planetary reduction mechanism and used for transmitting the power to the drum connecting disc.

[0010] Preferably, the driving mechanism comprises a single-output shaft motor and a power transmission mechanism in transmission connection between the rotating shaft of the single-output shaft motor and the pair of power input shafts.

[0011] Preferably, the central axis of the drum connecting disc is parallel to the power input shaft.

[0012] Preferably, the cutting part water supply is internal spray water supply.

[0013] Preferably, the water provided by the external water supply system of the coal mining machine is transported to the cutting drum through the power input shaft to realize the internal spray water supply of the cutting drum.

[0014] In addition, the present application also provides a thin coal seam coal mining machine comprising the cutting device as described above.

[0015] Further, it further comprises a chain traction conveying device, and the cutting device is dragged to walk along the coal mining working face by the traction chain of the chain traction conveying device.

[0016] In addition, the present application also provides a method for forming the thin coal seam cutting device of the coal mining machine as described above.

[0017] Preferably, the coal mining machine cutting device adopts internal spray water supply. Compared with the prior art, the thin coal seam mining machine cutting device and the forming method thereof, and the coal mining machine with the cutting device have the following beneficial effects:

[0018] 1. The thin coal seam mining machine and the cutting device have short length, width and height, so that the length, width and height of the whole coal mining machine are short, the space occupancy rate is greatly reduced, the mining width is small, the conditions of the roadway are not good, and the thin coal seam mining efficiency is improved.

[0019] 2. The height of the cutting drum is easy to adjust, the coal mining height can be better adapted, the reliability and safety maintenance of the whole machine are good, and the thin coal seam is vertically cut.

[0020] 3. The internal spray water supply of the cutting drum is supplied through the power input shaft, so that the problem of pipeline damage caused by scratching the water supply pipeline during the coal mining work of the ultra-short cutting part (about 0.5 meters long) is avoided, the maintenance frequency is greatly reduced, and the coal mining efficiency is improved.

[0021] The present application will be described in detail below with reference to the drawings. DETAILED DESCRIPTION

[0022] Figure 1 is a half sectional view of the cutting part of the present application (the cutting drum is not shown);

[0023] Figure 2 is a bottom view of the cutting part of the present application;

[0024] Figure 3 is a half sectional view of the first cutting transmission assembly of the present application;

[0025] Figure 4 is a half sectional view of the double planetary reduction mechanism of the present application;

[0026] Figure 5 is a half sectional view of the water supply assembly of the present application;

[0027] Figure 6 is a perspective view of the cutting part of the present application;

[0028] Figure 7 is a perspective view of the coal mining machine cutting device of the present application. DETAILED DESCRIPTION

[0029] As Figure 7As shown in the figure, the cutting device of the thin seam coal mining machine provided by the present application comprises: a pair of cutting parts 3 arranged on the left side and the right side of the machine body 1 of the coal mining machine; a driving mechanism installed in the middle of the machine body and used for simultaneously providing driving force for the power input shafts of the pair of cutting parts; wherein each cutting part is hinged with the machine body box through a joint bearing, and each cutting part is hinged with the driving mechanism box 4 through a height-adjusting oil cylinder 2, and when the height-adjusting oil cylinder is extended and retracted, the cutting part is swung around the center line of the joint bearing, so as to realize the adjustment of the coal mining height of the cutting drum 112.

[0030] The driving mechanism of the present application is installed in the middle of the machine body, and comprises a single-shaft motor (such as a 500KW motor) and a power transmission mechanism for transmission connection between the rotating shaft of the single-shaft motor and the pair of power input shafts. The power transmission mechanism adopts a gear transmission mechanism, the gear transmission mechanism takes the rotating shaft of the single-shaft motor as the power input shaft, transmits the power to the pair of power input shafts of the pair of cutting parts through one or more gear transmissions, and then transmits the power to the pair of cutting drums through the pair of power input shafts. The center line of the power input shaft is the rotation center of the cutting part.

[0031] That is to say, any cutting part of the present application does not install a cutting motor, and the pair of cutting parts are simultaneously driven by a 500KW cutting motor installed in the middle of the machine body of the coal mining machine, so that the cutting part of the present application can become an ultra-short cutting part (the ultra-short cutting part refers to that the center distance between the cutting drum and the swing center of the cutting part, i.e. the center line of the power input shaft, is about 511mm). The cutting motor simultaneously drives the power input shaft 102 (the shaft is a spline shaft) at the rotation center position of the left and right cutting parts through gear transmission, and then transmits the power to the drum connecting disc 110 through the spline shaft, so as to drive the cutting drum 112 to rotate and complete the coal cutting and loading work.

[0032] The pair of cutting parts of the present application are symmetrical and arranged on both sides of the machine body, and the power input shaft of each cutting part is key-connected with the power output shaft of the corresponding side of the driving mechanism. Figure 1 As shown in the figure, the cutting part has a shell, and the shell comprises: a first shell 104, inside which the power input shaft 102 (a spline shaft) is arranged; a second shell 113 integrally connected with the side wall of the first shell, the second shell and the first shell are a complete shell in the shape of L, and a hollow inner cavity for arranging other components is formed inside. The two ends of the first shell are hinged with the machine body box through a set of joint bearings, that is, the rear end of the first shell 104 (the rear end corresponds to the lower part in Figure 1 the rear end of the machine body box is hinged through the first joint bearing 103, and the middle upper part of the first shell is hinged with the front end of the machine body box (the front end corresponds to the middle upper part in Figure 1 the driving mechanism box through the second joint bearing 105, and the second shell is hinged with the driving mechanism box through the height-adjusting oil cylinder, that is, the second shell is provided with a hinge seat 114 (seeFigure 6 ), the piston rod of the height-adjusting oil cylinder is hinged to the hinge seat, and the cylinder body of the height-adjusting oil cylinder is hinged to the hinge seat installed on the driving mechanism box 4, so that when the height-adjusting oil cylinder is extended or retracted, the corresponding side cutting part can be swung up and down around the center line of the corresponding first joint bearing and second joint bearing, and the adjustment of the coal mining height of the corresponding side cutting drum 112 is realized.

[0033] In order to enable the cutting drum to rotate and work under the driving of the driving mechanism, the cutting part further comprises a power transmission mechanism for transmitting the power input by the power input shaft to the cutting drum, which comprises: a gear transmission mechanism having the power input shaft 102; and a double planetary reduction mechanism 109 in transmission connection with the power output wheel of the gear transmission mechanism; wherein the double planetary reduction mechanism transmits power to the drum connecting disc 110 to drive the cutting drum installed on the drum connecting disc to rotate and mine coal.

[0034] As shown in Figure 1 , the gear transmission mechanism comprises three transmission assemblies, i.e., a first cutting transmission assembly 106, a second cutting transmission assembly 107, and a third cutting transmission assembly 108. When the 500KW cutting motor located in the middle of the shearer body drives the power input shaft 102 at the center position of the left and right cutting parts to rotate simultaneously, the power will be transmitted from the power input shaft to other parts of the first cutting transmission assembly 106, then transmitted to the third cutting transmission assembly 108 through the second cutting transmission assembly 107, and finally transmitted to the drum connecting disc 110 through the double planetary reduction mechanism 109, so as to drive the cutting drum 112 installed on the drum connecting disc 110 to rotate and complete the cutting and loading work.

[0035] Different from the structure of the prior art first cutting transmission assembly which only transmits power, the first cutting transmission assembly of the present application not only transmits power but also transmits internal spraying high-pressure water. The structure of the first cutting transmission assembly can be seen from Figure 3 , which comprises: a power input shaft rotatably connected to the first housing and being a hollow shaft; a water pipe 101 installed in the hollow inner cavity of the power input shaft and in communication with the external water supply system of the shearer; and a shaft gear 206 in engagement with the power input shaft, which transmits power to the second cutting transmission assembly.

[0036] Specifically, as shown in Figure 3As shown, the first cutting transmission assembly includes the following components: a shaft end cover 201, an O-ring 202, an O-ring 203, a cylindrical roller bearing 204, an O-ring 205, a shaft gear 206, a cylindrical roller bearing 207, a distance pad 208, a cutting spline shaft, i.e., a power input shaft 102, and a water pipe 101. During assembly, the shaft gear 206 is supported at both ends by the cylindrical roller bearing 204 and the cylindrical roller bearing 207, the outer ring cylindrical surface of the cylindrical roller bearing 204 is supported by a shaft end cover 201, and the cylindrical roller bearing 207 and the distance pad 208 are supported at the first housing shaft hole by a shaft end cover 201. The cutting spline shaft is installed at the center position of the shaft gear 206, the outer spline of the cutting spline shaft is engaged with the inner spline of the shaft gear, the O-rings 202, 203, and 205 are installed in the corresponding O-ring grooves, the water pipe 101 is installed at the center position of the cutting spline shaft, and the water pipe 101 passes through the spline shaft center hole from the outside to the inside and is connected in communication with the water channel provided on the shaft end cover. When the spline shaft rotates under the action of the driving mechanism, the shaft gear connected with the spline shaft is driven to rotate, so as to transmit power to the second cutting transmission assembly through the shaft gear.

[0037] The second cutting transmission assembly of the present application includes a fixed shaft, a gear rotatably installed on the fixed shaft, and other elements for assembling the fixed shaft to the second housing, and the fixed shaft is arranged in parallel with the spline shaft of the first cutting transmission assembly. The third cutting transmission assembly includes an output gear and other elements for assembling the output gear to the second housing.

[0038] The gear of the second cutting transmission assembly acts as an idler gear for transmitting the output power of the first cutting transmission assembly to the third cutting transmission assembly, i.e., the idler gear is connected in external engagement with the shaft gear 206 of the first cutting transmission assembly, and the output gear of the third cutting transmission assembly is connected in external engagement with the idler gear, so that the rotational power of the spline shaft is transmitted to the output gear through the idler gear, and the front part of the output gear is connected by spline to the primary sun gear of the double planetary reduction mechanism, so that power can be transmitted to the double planetary reduction mechanism.

[0039] During assembly, the output gear of the third cutting transmission assembly is arranged in the second housing and close to the driving motor, the spline shaft of the first cutting transmission assembly is supported by the first housing and away from the driving motor, and the second cutting transmission assembly is located between the third cutting transmission assembly and the first cutting transmission assembly, i.e., the three cutting assemblies are arranged left and right along the width direction of the fuselage, so as to reduce the occupation of the space in the width direction of the fuselage and create conditions for forming an ultra-short cutting part.

[0040] The double planetary reduction mechanism for transmitting the output power of the third cutting transmission assembly comprises a first-stage planetary reduction mechanism in transmission connection with the output gear of the third cutting transmission assembly and a second-stage planetary reduction mechanism in transmission connection with the first-stage planetary reduction mechanism and used for transmitting power to the connecting disc of the drum.

[0041] Specifically, as shown in Figure 4 The double planetary reduction mechanism 109 of the ultra-short cutting section of the present application comprises a first-stage sun gear 301, a retainer 302, a retainer 303, a retainer ring 304, a first first-stage distance pad 305, a retainer 306, a first-stage planetary shaft 307, a first-stage pin 308, a first-stage planetary gear 309, a first-stage inner ring gear 310, a retainer 311, a first-stage inner distance pad 312, a bearing 313, a first-stage planetary carrier 314, a connecting ring 315, a second first-stage distance pad 316, a bearing 317, a screw 318, a lock washer 319, a second-stage sun gear 320, a second-stage planetary gear 321, a second-stage inner distance pad 322, a pin 323, a bearing 324, a bearing 325, a second second-stage distance pad 326, a bearing 327, a floating seal seat 328, a lock washer 329, a screw 330, a floating seal 331, a bolt 332, a washer 333, a planetary gland 334, a bolt 335, a planetary cooler 336 (a tubular structure for introducing cooling water as an external cooling water channel to cool the internal gears of the planetary mechanism during the operation of the planetary gear), a screw 337, a lock washer 338, a second-stage planetary carrier 339, a bearing seat 340, a bolt 341, a second-stage planetary shaft 342, a first second-stage distance pad 343, a second-stage inner ring gear 344, a retainer 345, a retainer 346, a nut 347 and an O-ring seal, etc.

[0042] When assembling the first-stage planetary reduction mechanism, the first-stage planetary inner ring gear is fixed in the corresponding hole position of the second housing by a screw, a lock washer and a pin, the first-stage sun gear is in external engagement with the first-stage planetary gear, the first-stage planetary gear is in engagement with the first-stage planetary inner ring gear, and when the first-stage sun gear rotates, it drives the first-stage planetary gear to rotate around the center of the first-stage planetary inner ring gear, thereby driving the first-stage planetary carrier to rotate around the center of the first-stage planetary inner ring gear.

[0043] The second-stage sun gear of the second-stage planetary reduction mechanism is splinedly connected to the first-stage planetary carrier of the first-stage planetary reduction mechanism. When assembling the second-stage planetary reduction mechanism, first install the second-stage planetary gears, second-stage planetary shafts, inner spacer pads, pins, bearings, and washers to their corresponding positions on the second-stage planetary carrier. Install bearing 327 to its bearing housing. Install the floating seal seat to the bearing housing using anti-loosening washers and screws. Install the planetary cooler 336 and planetary gland 334 together using bolts and anti-loosening washers. Simultaneously, install all O-ring seals. Install the floating ring and diamond-shaped rubber ring of the floating seal into the sealing grooves of the floating seal seat and the connecting sleeve, respectively. Install the second-stage planetary carrier with the second-stage planetary gears installed into the bearing inner ring in the bearing housing. Engage the inner spline of the connecting sleeve with the floating seal to the outer spline of the planetary carrier. Secure the planetary gland to the planetary carrier using bolts and anti-loosening washers. Figure 4 Install the bearing in the indicated position, insert the pin into the pin hole of the secondary internal gear ring, install the bearing housing with the sealing ring and mate it with the stop of the secondary internal gear ring, and install the secondary planetary gears in the secondary planetary carrier into the secondary internal gear ring. Install the secondary spacer 301 in the secondary planetary carrier, install the secondary sun gear, install the secondary spacer 302, and then install the bearing 313 as shown. Figure 4 The installation is now complete, and the double planetary reduction mechanism of the cutting section is assembled. The roller connecting disc is fitted onto the front of the secondary planetary carrier and keyed to it. The central axis of the roller connecting disc is parallel to the central axis of the power input shaft.

[0044] The relative positions and assembly relationships of the components of the double planetary reduction mechanism are readily known to those skilled in the art and will not be described in detail here. The output gear of the third cutting transmission assembly transmits power to the first-stage sun gear of the first-stage planetary reduction mechanism, and then transmits the power to the second-stage sun gear of the second-stage planetary reduction mechanism through the first-stage planetary carrier. Finally, the power is transmitted to the drum connecting plate and the cutting drum connected to the drum connecting plate, causing the cutting drum to rotate and mine coal.

[0045] The water supply for the ultra-short cutting section of this invention adopts internal spray water supply. The water supplied from the external water supply system of the coal mining machine passes sequentially through the main water valve, water pipe, water distribution valve, water pipe and hinge body to the ultra-short cutting section. It enters the water supply pipe 101 located in the spline shaft at the rotation center of the ultra-short cutting section, flows through the internal water channel set on the shaft end cover 201 of the cutting section to the water channel set on the cutting section shell, and then through the shell water channel to the water supply assembly 111. Finally, it is delivered to the drum water channel and drum nozzle to complete the internal spray dust suppression and dust removal work.

[0046] The water channel on the housing connects the water supply pipe 101 inside the spline shaft to the water supply channel of the water supply assembly. The structure of the housing water channel can be formed using existing technology, which will not be described in detail here.

[0047] The water supply components can be adopted Figure 5The structure shown includes the following components: connector 401, U-pin 402, hydraulic hose 403, hinge body 404, hinge bolt 405, washer 406, O-ring seal 407, O-ring seal 408, planetary cooling pipe 409, anti-loosening washer 410, screw 411, water supply pipe assembly 412 (a welded water supply pipe), retaining ring 413, bearing 414, sealing ring 415, water seal seat 416, step seal 417, water seal 418, O-ring seal 419, O-ring seal 420, copper sleeve 421, and inner spray connecting plate 422. The inner spray connecting plate is provided with an inner spray water channel, which is connected to the water channel on the shell, thereby allowing water flowing in the water pipe 101 to be transported through the shell water channel to the water channel of the inner spray connecting plate. The water channel of the inner spray plate is connected to the water channel of the water supply pipe assembly 412, and is transported to the drum water channel through the water supply pipe assembly.

[0048] The water channel consists of two water channel holes machined on the square hole connecting plate of the cutting drum. A U-shaped water channel is machined on the inner edge of the drum's end plate, and the two water channels on the square hole connecting plate communicate with the U-shaped water channel on the drum's end plate. A U-shaped water channel is machined on the inner edge of each spiral blade. During welding, it is ensured that the U-shaped water channel on the drum's end plate communicates with the U-shaped water channel machined on the inner edge of the spiral blade. Multiple nozzles are arranged on the outer edges of the end plate and spiral blades, each nozzle communicating with either the U-shaped water channel on the end plate or the U-shaped water channel on the inner edge of the spiral blade. This allows water reaching the cutting section to flow through the water channel to the drum nozzle and be sprayed onto the working face. The water supply assembly and the structure of the water channels on the cutting drum utilize existing technology and will not be described in detail here.

[0049] This invention places a water pipe inside a splined shaft, with one end connected to an external water supply system and the other end connected to a water channel on the housing. This allows high-pressure water supplied by the water supply system to be transmitted to the housing water channel via a first cutting transmission assembly, and then further forward via the upper water channel of the housing. This structure, which simultaneously transmits power and internal high-pressure water spray via the first cutting transmission assembly, effectively solves the problem of high-pressure water transmission within the ultra-short cutting section. This is because, compared to the existing technology where the distance between the center of the cutting drum and the center of rotation is 2-3 meters, the cutting section of this invention, with a distance of only about 0.5 meters, is extremely short. During the coal cutting process, the cutting drum will be buried in the coal or in contact with the coal wall, causing the first cutting transmission component to be buried in the coal or in contact with the coal wall. If the external water supply system directly delivers high-pressure water to the water channel opened on the shell of the cutting section through the exposed water pipe, the exposed water pipe will repeatedly rub against the coal wall during coal cutting, causing the water pipe to be damaged due to scraping against the coal wall and interrupting the water supply to the cutting drum. At this time, the machine must be stopped immediately for maintenance, otherwise the cutting drum will be damaged, which will increase the difficulty and cost of maintenance and reduce the coal mining efficiency.

[0050] In summary, the cutting part can swing up and down relative to the shearer body, and the cutting part is not arranged with a driving motor, the rotation of each cutting drum is driven by a 500KW motor installed in the middle of the shearer body, and the external water supply system is transported to the water channel of the shell through the water pipe arranged in the spline shaft, so as to be transported to the cutting drum and the nozzle through the water channel and the water supply assembly, so that the center distance between the cutting drum and the swing center of the cutting part is only about 0.5 meters, and the ultra-short cutting part can better meet the overall design requirements of the ultra-short shearer and better adapt to the coal mining operation by using the vertical cutting mining process.

[0051] In addition to the above-mentioned thin seam shearer cutting device, the present application also provides a thin seam shearer, which comprises a chain traction conveying device in addition to the above-mentioned cutting device, and the cutting device is dragged along the coal mining face by the traction chain of the chain traction conveying device.

[0052] When the shearer with the ultra-short cutting part is working, the traction is provided by the chain traction (i.e. traction by the traction chain) of the chain traction conveying device (also called chain traction conveyor), the traction chain drags the shearer cutting device to walk along the working face, each ultra-short cutting part can swing around the center line of the corresponding two joint bearings, the two ends of the height adjusting cylinder are connected with the cutting part and the driving mechanism box through the pin shaft, the height adjusting cylinder is above the shearer body, the height adjusting cylinder is provided with high-pressure halogenated liquid by the halogenated liquid pump station in the roadway, the extension and retraction of the height adjusting cylinder are controlled by the electromagnetic valve group, the swing angle of the rocker arm is adjusted, and the change of the cutting drum coal cutting height is realized. Since the shearer body is particularly short, when the shearer is at one end of the coal mining face, the pusher of the hydraulic support pushes the conveyor close to the coal wall, thereby driving the shearer cutting drum to cut coal and enter the coal wall, and the conveyor arranged on the working face is pushed into a straight line, without cutting the cutting drum into the coal wall at an angle, so that the conveyor is arranged in a straight line during working, the resistance of the flight chain is reduced when the conveyor is bent, and the frequency of faults during the use of the conveyor is reduced. The shearer control is controlled by the control console arranged in the roadway, and the mining of the few-person or unmanned working face is realized.

[0053] In addition to the above-mentioned thin seam shearer and its cutting device, the present application also provides a method for forming the above-mentioned thin seam shearer cutting device, which comprises:

[0054] The pair of cutting units of the coal mining machine are formed, which include a shell, a gear transmission mechanism arranged on the shell, a double planetary reduction transmission mechanism, a cutting drum, a water supply assembly and other components, wherein a water pipe is arranged at the center of the power input shaft of each cutting unit gear transmission mechanism, the water pipe water channel is connected with the water channel on the shell through the water channel arranged on the shaft end cover at one end of the power input shaft, the water channel on the shell is connected with the water pipe assembly welding piece through the water channel of the spray connecting plate in the water supply assembly, and the water pipe assembly welding piece water channel is connected with the cutting drum and the nozzle. The specific structure of the above components of the cutting unit is described above, and is not repeated here.

[0055] After the cutting unit with the above structure is formed, the single-output shaft motor of the driving mechanism of the coal mining machine and the box body are arranged in the middle of the machine body of the coal mining machine, and the pair of cutting units are symmetrically arranged on the left and right sides of the machine body of the coal mining machine (i.e. symmetrically located on the left and right sides of the driving mechanism box body), the two cutting units are hingedly connected to the corresponding sides of the machine body box body through two groups of joint bearings, and the rotating shaft of the single-output shaft motor is drivingly connected with the pair of power input shafts of the cutting unit through the power transmission mechanism of the driving mechanism, so that the cutting unit can rotate around the center line of the power input shaft as the rotation center, and the power of the motor is transmitted to the pair of cutting drums through the pair of power input shafts.

[0056] The two cutting units are hingedly connected to the corresponding sides of the driving mechanism box body through two height adjustment oil cylinders, so that when the height adjustment oil cylinders are extended and retracted, the corresponding side cutting unit is swung around the center line of the joint bearing, and the cutting height of the cutting drum of the corresponding side cutting unit is adjusted.

[0057] The cutting unit of the application does not arrange a driving motor, the rotation of each cutting drum of the cutting unit is driven by a 500KW motor installed in the middle of the machine body of the coal mining machine, the cutting unit swings up and down relative to the machine body of the coal mining machine with the spline shaft as the rotation center, and the power transmission mechanism for transmitting power from the spline shaft to the cutting drum has a compact structure and occupies a small space. In combination with the external water supply system, the water pipe arranged in the spline shaft is used to transport water to the water channel of the shell, and the water channel of the shell and the water supply assembly are used to transport water to the cutting drum and the nozzle, so that an ultra-short cutting device with a center distance of about 0.5 meters between the cutting drum and the swing center of the cutting unit can be formed, which can better meet the overall design requirements of the ultra-short coal mining machine and better adapt to the coal mining operation using the vertical tooling mining process.

[0058] Although the application has been described in detail above, the application is not limited thereto, and those skilled in the art can make modifications according to the principles of the application, therefore, all modifications made according to the principles of the application should be understood as falling within the scope of protection of the application.

Claims

1. A thin seam coal mining machine cutting device, comprising: a pair of cutting units arranged on the left and right sides of the machine body; a drive mechanism installed in the middle of the machine body and used to provide driving force for the power input shafts of the pair of cutting units; wherein the cutting unit housing includes a first housing for internally passing the power input shaft as the rotation center of the cutting unit, and a second housing with a side wall connected to the side wall of the first housing to form a complete L-shaped housing, the two ends of the first housing are hinged to the machine body box through a set of joint bearings, and the second housing is hinged to the drive mechanism box through a height adjustment oil cylinder, when the height adjustment oil cylinder is extended or retracted, the cutting unit is swung around the center line of the power input shaft as the rotation center, to realize the adjustment of the cutting drum coal mining height; wherein the power input shaft is a hollow shaft, a water pipe is installed in the hollow inner cavity, one end of the water pipe is connected in communication with the external water supply system of the coal mining machine, and the other end is connected in communication with the water channel formed on the housing, so that the high-pressure water provided by the water supply system can be transmitted to the housing water channel, and then continuously forwarded through the housing water channel.

2. The cutting device according to claim 1, the cutting unit further comprises a power transmission mechanism for transmitting the power input by the power input shaft to the cutting drum, comprising: a gear transmission mechanism with a power input shaft; a double planetary reduction mechanism in transmission connection with the power output wheel of the gear transmission mechanism; wherein the double planetary reduction mechanism transmits power to the drum connecting disc to drive the cutting drum installed on the drum connecting disc to rotate and mine coal.

3. The cutting device according to claim 2, the central axis of the drum connecting disc is parallel to the power input shaft.

4. The cutting device according to claim 3, the cutting unit water supply is internal spray water supply.

5. The cutting device according to claim 4, the water provided by the external water supply system of the coal mining machine is transported to the cutting drum through the power input shaft, to realize the internal spray water supply of the cutting drum.

6. A thin seam coal mining machine comprising the thin seam coal mining machine cutting device according to any one of claims 1-5.

7. The thin-seam shearer according to claim 6, further comprising: Chain traction transport device, the cutting device is dragged along the coal mining face by the traction chain of the chain traction transport device.

8. A method for forming the thin seam coal mining machine cutting device according to any one of claims 1-5, comprising: forming a pair of cutting units of the coal mining machine, each cutting unit having a housing including a first housing for internally passing the power input shaft as the rotation center of the cutting unit, and a second housing with a side wall connected to the side wall of the first housing to form a complete L-shaped housing; after forming the cutting unit, placing the single-shaft motor and box of the drive mechanism of the coal mining machine in the middle of the machine body, placing a pair of cutting units symmetrically on the left and right sides of the machine body, hinging the first housing of the two cutting units to the corresponding side of the machine body box through two sets of joint bearings, and transmission connecting the rotating shaft of the single-shaft motor to the pair of power input shafts of the cutting units through the power transmission mechanism of the drive mechanism, so that the cutting unit can rotate around the center line of the power input shaft, and transmit the power of the motor to a pair of cutting drums through the pair of power input shafts. Each cutting part second shell is hinged with the driving mechanism box through the height-adjusting oil cylinder, and the cutting part is swung with the power input shaft center line as the rotation center when the height-adjusting oil cylinder is extended or retracted, so as to realize the adjustment of the coal mining height of the cutting drum. The power input shaft is a hollow shaft, a water pipe is arranged in the hollow inner cavity, one end of the water pipe is connected with an external water supply system of the coal mining machine in communication, and the other end is connected with a water channel arranged on the shell in communication, so that high-pressure water provided by the water supply system can be transmitted to the shell water channel and continuously forwarded through the shell water channel.

9. The method of claim 8, wherein the coal mining machine cutting device adopts internal spray water supply.

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