CN-115539032-B - Semi-suspension type cutting device and thin seam coal cutter

CN115539032BCN 115539032 BCN115539032 BCN 115539032BCN-115539032-B

Abstract

The invention relates to a semi-suspension type cutting device and a thin seam coal cutter, wherein the semi-suspension type cutting device comprises a shell, a cutting motor and a cutting transmission system which are arranged in the shell, the cutting transmission system comprises a first straight tooth transmission mechanism, a second straight tooth transmission mechanism, a third straight tooth transmission mechanism and a planetary reduction mechanism which are sequentially connected in a transmission way, the planetary reduction mechanism and the first straight tooth transmission mechanism are positioned at the forefront part in the front-back direction, the third straight tooth transmission mechanism is secondary, the second straight tooth transmission mechanism is finally arranged at the air-taking side of the shell, the rear part of the cutting motor and a motor cylinder body where the cutting motor is positioned are in a backward suspension mode and exceed the second straight tooth transmission mechanism, and the left cutting device and the right cutting device of the thin seam coal cutter are both provided with the semi-suspension type cutting device. The invention can solve the contradiction between the height of the face of the thin seam coal mining machine, the installed power, the coal passing space, the stability and the adaptability of the whole machine, and the problems of inconvenient maintenance and high damage and replacement cost of the cutting motor.

Inventors

LIU FENG
HU TAO
WEI SHENG
GUO DAI
SHI CHUNXIANG
ZHAI YUSHENG
SONG XIANGKUN
YUE NANGENG
WANG CAN
LI QINGLIANG
HUANG QIULAI
XU WEIPENG

Assignees

天地上海采掘装备科技有限公司
中煤科工集团上海有限公司
中国煤炭科工集团有限公司

Dates

Publication Date: 20260512
Application Date: 20220909

Claims (9)

1. The semi-suspension type cutting device is characterized by comprising a shell, a cutting motor and a cutting transmission system, wherein the cutting motor and the cutting transmission system are arranged in the shell, the cutting transmission system comprises a first-stage straight tooth transmission mechanism, a second-stage straight tooth transmission mechanism, a third-stage straight tooth transmission mechanism and a planetary reduction mechanism which are sequentially connected in a transmission mode, the axes of all gears in the cutting transmission system extend horizontally front and back, the planetary reduction mechanism and the first-stage straight tooth transmission mechanism are positioned at the forefront in the front-back direction, the second-stage straight tooth transmission mechanism is positioned at the rearmost, the third-stage straight tooth transmission mechanism is positioned between the first-stage straight tooth transmission mechanism and the second-stage straight tooth transmission mechanism, the cutting motor is positively arranged at the air taking side of the shell, the power output end of the cutting motor is coaxially connected with an input end gear of the first-stage straight tooth transmission mechanism, the output end gear of the third-stage straight tooth transmission mechanism is forwardly coaxially connected with a sun gear of the planetary reduction mechanism, the rear part of the cutting motor and a motor cylinder body where the cutting motor is positioned extends backwards and exceeds the second-stage straight tooth transmission mechanism, a wiring cavity of the motor is arranged in the motor cylinder body, a wiring cavity of the motor is arranged between the first-stage straight tooth transmission mechanism and a sealed cavity, the second-stage straight tooth transmission mechanism is arranged at the rear end of the second-stage sealed cavity, and the sealed cavity is arranged at the rear end of the sealed cavity, respectively, and the sealed cavity is sealed.
2. The semi-suspended cutting device of claim 1, wherein the cutting motor is a high power density motor.
3. The semi-suspended cutting device of claim 1, wherein the first stage spur gear comprises a head gear, an idler gear and a coal wall side big gear which are sequentially and externally meshed in a transmission direction, the second stage spur gear comprises a hollow side big gear and a hollow side big gear which are sequentially and externally meshed in the transmission direction, the third stage spur gear comprises a coal wall side big gear, an idler gear and a tail end gear which are sequentially and externally meshed in the transmission direction, the idler gears in the first stage spur gear and the third stage spur gear are respectively one idler gear or a plurality of idler gears which are sequentially and externally meshed, the coal wall side big gear and the hollow side big gear are respectively rotatably supported in a shell through two groups of bearings, the coal wall side big gear is rotatably supported in the shell through two groups of bearings at two ends of the coal wall side big gear, the hollow side big gear is sleeved on the coal wall side big gear and is connected with the coal wall side big gear, and the head gear and the tail end gear are respectively formed into an input end gear of the first stage spur gear and an output end gear of the third stage spur gear.
4. A semi-suspended cutting device as set forth in claim 3 wherein said coal wall side shaft gear radially centers said mining side gear by mating cylindrical surfaces at both ends of its spline with corresponding holes of said mining side gear.
5. A semi-suspended cutting device as set forth in claim 3, wherein an oil storage cavity is provided between the coal wall side gearwheel and the hollow side gearwheel, and a long spline shaft connecting the coal wall side gearwheel and the hollow side gearwheel penetrates through the oil storage cavity.
6. A semi-suspended cutting device as set forth in claim 1,2, 3, 4 or 5, wherein a low-pressure water channel and a high-pressure water channel which are not communicated with each other are arranged in a solid structure of a shell wall of the shell, a nozzle is arranged on a shell of the shell, an inlet of the nozzle is communicated with the low-pressure water channel, a cooling water channel in a large end cover at an input end gear of the first-stage straight-tooth transmission mechanism and a cooling water channel in a large end cover at an output end gear of the third-stage straight-tooth transmission mechanism are both communicated with the high-pressure water channel, and the latter is connected at the tail end of the high-pressure water channel and is connected with an inlet of the internal spraying water delivery mechanism.
7. A thin seam coal mining machine is characterized in that a left cutting device and a right cutting device are respectively a semi-suspension cutting device according to any one of claims 1-6, the left cutting device and the right cutting device are symmetrically arranged on the left side and the right side of a machine body and are hinged with a left traction traveling part and a right traction traveling part respectively, a cutting motor is positioned above and on the inner side and the outer side of a coal wall side ledge of the scraper conveyor in a matched installation state of the thin seam coal mining machine and the scraper conveyor, the rear end of the cutting motor does not exceed the center of a middle groove of the scraper conveyor backwards, and a cutting transmission system is positioned on the outer side of the coal wall side ledge of the scraper conveyor.
8. The low seam mining machine of claim 7, wherein the first stage spur gear train is positioned in front of and spaced from the scraper conveyor, and the second stage spur gear train and the third stage spur gear train are positioned above the coal shoveling plate outside the side walls of the coal wall.
9. The thin seam mining machine of claim 8, wherein the left and right traction traveling part shells are respectively provided with a traction motor and a traction transmission system, the traction transmission system comprises a first and a second straight tooth transmission systems and a two-stage planetary reduction mechanism, and most of the traction transmission system and all of the traction motor are arranged above the coal wall side ledge of the scraper conveyor.

Description

Semi-suspension type cutting device and thin seam coal cutter Technical Field The invention relates to a cutting device suitable for a thin seam coal cutter and the coal cutter applying the cutting device, and belongs to the technical field of coal mine machinery. Background The conventional coal cutter cutting device with transverse arrangement (the transverse arrangement of the coal cutter cutting device refers to that the axis of a cutting motor is vertically arranged relative to the travelling direction of the coal cutter, namely, the direction of a working surface), because the cutting motor is arranged above two ledge sides of the scraper conveyor, the cutting motor can affect the safety clearance with a hydraulic support when swinging upwards along with the cutting device, the height of a machine face is correspondingly increased, the coal passing space can be reduced when swinging downwards, the larger the power of the motor is, the larger the diameter of the motor is, the size of the cutting motor directly affects the height of the machine face and the coal passing space, and the low-seam coal cutter requires lower height of the machine face and a certain coal passing space, so that the improvement of the cutting power of the low-seam coal cutter is restricted. It has been proposed by the industry to arrange the cutting motor on the coal wall side in opposite directions and on the same side of the conveyor as the planetary mechanism, and to use the coal wall side space to avoid the influence of the cutting motor on the machine face height and the coal passing space. However, the coal mining machine with the full-suspension arrangement mode has two defects that on one hand, the cutting motor is reversely arranged on the coal wall side, the motor needs to be disassembled from the coal wall side, the maintenance space required by the disassembly and assembly of the motor exceeds the roller, so that the motor can touch the solid coal wall which is not yet mined by the roller, the special maintenance space is required to be mined on the coal wall side during maintenance, the working space of a thin coal layer working surface is narrow, the maintenance and the replacement are very inconvenient, and on the other hand, the main structure part of the whole machine is wholly suspended on the coal wall side, the gravity center of the whole machine deviates from a supporting skid shoe, so that the stress condition of the coal mining machine is deteriorated in the operation process, the bottom plate fluctuation is difficult to adapt, and the operation stability and the adaptability of the coal mining machine are reduced. Disclosure of Invention The invention aims to provide a semi-suspension type cutting device and a thin seam coal mining machine, which can solve the problems of contradiction among the height of the machine face of the thin seam coal mining machine, the installed power, the coal passing space, the stability and the adaptability of the whole machine, inconvenience in maintenance of a cutting motor and high damage and replacement cost. The main technical scheme of the invention is as follows: The utility model provides a semi-suspension type cutting device, includes casing and installs the cutting motor and the cutting transmission system in the casing, the cutting transmission system includes first level straight-tooth drive mechanism, second level straight-tooth drive mechanism, third level straight-tooth drive mechanism and the planetary reduction mechanism of transmission connection in proper order, the axis of all gears in the cutting transmission system all is horizontal extension around, planetary reduction mechanism and first level straight-tooth drive mechanism are located forefront in the fore-and-aft direction, second level straight-tooth drive mechanism is located rearmost, third level straight-tooth drive mechanism is located between first, the second level straight-tooth drive mechanism, cutting motor forward arrangement is in the blank side of casing, cutting motor's power take off end forward and first level straight-tooth drive mechanism's input gear coaxial coupling, third level straight-tooth drive mechanism's output end gear forward and planetary reduction mechanism's sun gear coaxial coupling, cutting motor barrel at the rear portion of cutting motor and place stretches backward and surpass second level straight-tooth drive mechanism. The wiring cavity of the cutting motor is arranged in the motor cylinder body, and the wiring cavity is preferably arranged at the rear end part of the upper half part of the motor cylinder body and is in a state of being suspended backwards relative to the lower half part of the motor cylinder body. The cutting motor is preferably a high power density motor. The first-stage straight-tooth transmission mechanism comprises a head gear, an idler gear and a coal wall side big gear which are sequentially and externally meshed according to a transmis