Thin seam compact coal cutter front body

Abstract

The present application relates to a kind of thin coal seam compact front body part of coal winning machine, including front body part shell, the middle part inner cavity and rear inner cavity of front body part shell are respectively equipped with cutting motor and left and right extension arrangement's front stage cutting transmission mechanism, front stage cutting transmission mechanism includes a shared input end gear and two groups of idler group and output end gear arranged in left and right and sequentially engaged, input end gear is coaxially connected with the output shaft of cutting motor, the left and right edges of front body part shell are respectively provided with first lug seat, second lug seat and connecting base, and the left and right two output end gears are respectively located in left and right two connecting base, and the first lug hole, second lug hole and output end gear of left and right same side are coaxial, and the lower part of front body part shell is equipped with semi-closed oil cylinder accommodating cavity.The present application can make coal winning machine have larger mining range, shorter body, and improve the gravity problem of thin coal seam coal winning machine.

Description

TECHNICAL FIELD

[0001] The present application relates to a local machine body structure of a coal mining machine, which is suitable for a thin seam coal mining machine and can cooperate with a specific structure of a rocker arm to obtain a larger mining range and improve the problem of the center of gravity of the coal mining machine. BACKGROUND

[0002] The overall structure of the upper suspension machine body section and the rocker arm part of the existing thin seam coal mining machine is complex, and some problems are accordingly accompanied. For example, the rocker arm is usually provided with an independent cutting motor, which causes the rocker arm to be longer, and the motor cylinder affects the upward swing of the rocker arm, thereby causing insufficient adaptability of the mining height. In addition, the machine body section between the left and right rollers is relatively long in the longitudinal dimension and heavy in weight due to the installation of open-type oil cylinders and the like, which causes the center of gravity of the coal mining machine to be deviated towards the coal wall, thereby causing problems of running stability and excessive wear of parts such as the sliding shoe.

[0003] In view of the above problems, the industry has proposed that the cutting part is divided into a swing part and a fixed part, and the cutting motor and the main part of the cutting transmission system are arranged in the fixed part, which causes the structure of the fixed part to be too complex, the length of the left and right machine body suspension sections to be relatively long, and the weight to be relatively large, and the influence of the problem of the center of gravity of the whole machine on the stress of the whole machine is still large. SUMMARY

[0004] The present application aims to provide a front main body part of a thin seam compact coal mining machine, which can make the coal mining machine have a larger mining range, a shorter machine body, and improve the problem of the center of gravity of the thin seam coal mining machine.

[0005] The main technical scheme of the present application is as follows:

[0006] A front main body part of a thin seam compact coal mining machine, comprising a front main body part shell, a cutting motor is arranged in the middle inner cavity of the front main body part shell, a front-stage cutting transmission mechanism is arranged in the left and right extension of the rear inner cavity of the front main body part shell, the front-stage cutting transmission mechanism comprises two groups of fixed shaft gear transmission mechanisms, the fixed shaft gear transmission mechanism comprises an input end gear, an idler gear set and an output end gear which are connected in sequence, the two groups of fixed shaft gear transmission mechanisms share the same input end gear, the input end gear is coaxially connected with the output shaft of the cutting motor, the left and right edges of the front main body part shell are respectively provided with a first ear seat, a second ear seat and a connecting base which are suspended to the left and right outer sides, the first ear seat, the second ear seat and the connecting base are arranged at intervals from front to back, a front groove is formed between the first ear seat and the second ear seat, a middle groove is formed between the second ear seat and the connecting base, the front part of the first ear seat and the second ear seat on the left and right sides is respectively provided with a first ear hole and a second ear hole, the rear inner cavity of the front main body part shell extends straight to the left and right ends of the connecting base, the output end gears of the two groups of fixed shaft gear transmission mechanisms are respectively located in the left and right connecting bases, the first ear hole, the second ear hole and the output end gear on the same side are coaxial, and the lower part of the front main body part shell is provided with an oil cylinder accommodating cavity which extends left and right and has an opening downward.

[0007] The bottom surface of the front groove and the middle groove is preferably set as a first group of inner concave circular arc cylindrical surface coaxial with the first ear hole, and the outer surface of the overhanging end of the first ear seat and the outer surface of the overhanging end of the second ear seat are preferably set as a second group of outer convex circular arc cylindrical surface coaxial with the first ear hole.

[0008] The first ear hole and the second ear hole are fixedly installed with wear-resistant sleeves.

[0009] The output shaft of the cutting motor is a hollow shaft, and the core shaft of the clutch mechanism passes through the hollow shaft from front to back and is coaxially splined coupled with the front part of the input gear.

[0010] The rear end surface of the front main body shell is a large plane, and the large plane is provided with left and right two positioning pin holes.

[0011] The positioning pin holes are tightly fitted with positioning pins one by one.

[0012] The positioning pin is a hollow positioning pin, and the central through hole of the positioning pin is coaxial with the output gear on the same side.

[0013] The rear part of the output gear is provided with a coaxial spline hole.

[0014] The front main body shell is a multi-chamber structure, and the chambers include a motor chamber, a transmission chamber, a containing chamber and a hydraulic chamber, the motor chamber and the transmission chamber are the middle inner chamber and the rear inner chamber respectively, the containing chamber is located in front of the hydraulic chamber, and the containing chamber and the hydraulic chamber are located on the left side or the right side of the motor chamber.

[0015] The chamber further includes a wiring channel, and the wiring channel extends through the hydraulic chamber and the transmission chamber from front to back.

[0016] The beneficial effects of the present application are:

[0017] The front main body shell serves as the front part of the machine body, equivalent to the suspended machine body section, mainly serving to connect the left and right swing arms and the rear main body. The hinge between the swing arm and the front main body shell is adjacent to the left and right sides of the cutting motor, and there is no other structure between the hinge and the cutting motor. Therefore, the left and right lengths of the machine body of the coal mining machine, especially the suspended machine body section, are significantly shortened, the weight of the suspended machine body section of the coal mining machine is greatly reduced, the center of gravity of the whole machine is shifted to the goaf side, the stress stability of the whole machine is improved, and the machine body is shortened, which facilitates the coal mining machine to perform a straight pushing cutter process similar to a shortwall coal mining machine, thereby improving the mining efficiency. The compact structure of the suspended machine body section also improves the reliability of the connection between the swing arm and the machine body.

[0018] The groove bottom surface of the front groove and the middle groove is preferably set as a first group of inner concave circular arc cylindrical surfaces coaxial with the first ear hole, and the overhanging end outer surface of the first ear seat and the overhanging end outer surface of the second ear seat are preferably set as a second group of outer convex circular arc cylindrical surfaces coaxial with the first ear hole. Correspondingly, a first group of outer convex circular arc cylindrical surfaces and a second group of inner concave circular arc cylindrical surfaces coaxial with the first ear hole are also correspondingly provided on the left and right swing arms, and when the left and right swing arms are hinged with the front main body part shell, the first group of outer convex circular arc cylindrical surfaces and the first group of inner concave circular arc cylindrical surfaces correspond one by one and leave a gap between each other, and the second group of outer convex circular arc cylindrical surfaces and the second group of inner concave circular arc cylindrical surfaces correspond one by one and leave a gap between each other. By controlling the size of the above-mentioned gap within a suitable range, the accumulation of coal and rock into the swing arm shell and the machine body during the up and down swinging of the swing arm can be effectively controlled, and the smooth swinging can be ensured.

[0019] The semi-closed oil cylinder accommodating cavity provided at the lower part of the front main body part shell can provide sufficient space for the swinging of the oil cylinder and the accommodation of certain coal and the layout of pipelines.

[0020] The height-adjusting oil cylinder is arranged below the cutting motor, which can further reduce the space occupation in the left and right directions, thereby providing a guarantee for realizing the compact structure of the short machine body coal mining machine.

[0021] The front main body part shell is a multi-chamber thin-walled frame structure, which greatly reduces the weight and is beneficial to the rear movement of the machine body gravity center, thereby further improving the stability of the whole coal mining machine. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 It is a front view of an embodiment of the present application;

[0023] Figure 2 It is an A-A sectional view of Figure 1

[0024] Figure 3 It is a structure schematic view of the embodiment shown in Figure 1

[0025] It is a B-B sectional view of Figure 4 Figure 2

[0026] Figure 5 It is a C-C sectional view of Figure 2

[0027] Reference signs:

[0028] ​​​​2. front body part; 21. front body part shell; 210. oil cylinder containing cavity; 211. first lug; 212. second lug; 213. front connecting base; 214. front groove; 215. middle groove; 216. containing cavity; 217. hydraulic cavity; 218. transmission cavity; 219. wiring channel; 22. cutting motor; 23. clutch mechanism; 24. input gear; 241. spline hole; 242. spline hole; 25. output gear; 251. spline hole; 252. spline hole; 27. filter; 28. gear pump; 29. positioning pin;

[0029] 5. height-adjusting oil cylinder. DETAILED DESCRIPTION

[0030] The application discloses a thin coal seam compact type coal mining machine front body part 2 (which can be simply referred to as a front body part), as shown in the figure, comprising a front body part shell 21, a cutting motor 22 is installed in the middle cavity of the front body part shell, and a front-stage cutting transmission mechanism is arranged in the left and right extension cavities in the rear part of the front body part shell. Figures 1-5 The front-stage cutting transmission mechanism comprises two groups of fixed shaft gear transmission mechanisms, and each fixed shaft gear transmission mechanism comprises an input gear 24, an idler gear set and an output gear 25 which are sequentially transmission-connected. The two groups of fixed shaft gear transmission mechanisms share the same input gear, and the input gear is coaxially transmission-connected with the output shaft of the cutting motor.

[0031] The left and right edges of the front body part shell are respectively provided with first lugs 211, second lugs 212 and connecting bases 213 which are suspended to the left and right outer sides, and the first lugs, the second lugs and the connecting bases are arranged at intervals from front to back. The front groove 214 is formed between the first lugs and the second lugs, and the middle groove 215 is formed between the second lugs and the connecting bases. The front parts of the two groups of first lugs and second lugs are respectively provided with first lug holes and second lug holes for being hingedly connected with the left and right swing arms. The rear cavity of the front body part shell extends straight to the left and right ends of the connecting bases, and the output gears 25 of the two groups of fixed shaft gear transmission mechanisms are respectively located in the left and right connecting bases. The first lug holes, the second lug holes and the output gears on the same side are coaxial, so that the power transmission of the front-stage cutting transmission mechanism to the rear-stage cutting transmission mechanism and the up-and-down swinging of the swing arm relative to the front body part can be simultaneously performed without interference.

[0032] The front body part shell only serves as a part of the machine body of the coal mining machine and is located at the front part of the machine body, which is equivalent to a suspended machine body section. The hingedly connected parts of the swing arm and the front body part shell are adjacent to the left and right sides of the cutting motor and are free of other structures, so that the left and right lengths of the machine body, especially the suspended machine body section, can be obviously shortened, and the connection reliability of the swing arm and the machine body is improved.

[0033] In addition, the length of the left and right body section is shortened, the gravity center of the whole machine is offset to the rear, and the stability of the whole machine is improved. Moreover, the body is shortened, the machine conveniently performs the straight pushing cutter process similar to the short wall mining machine, and the mining efficiency is improved.

[0034] The lower part of the front body part shell is provided with an oil cylinder accommodating cavity 210 extending left and right and opening downward. The left and right two height adjusting oil cylinders 5 for driving the left and right two rocker arms are installed in the oil cylinder accommodating cavity. The oil cylinder accommodating cavity is a semi-closed cavity, which can provide sufficient space for the oil cylinder to swing and accommodate a certain amount of coal and lay pipelines. The shell of the left and right rocker arms is also provided with an oil cylinder outer accommodating cavity corresponding to the oil cylinder. The outer ends of the left and right two height adjusting oil cylinders are located in the corresponding oil cylinder outer accommodating cavity in the installed state. The setting position of the oil cylinder accommodating cavity in the front-rear direction is preferably deviated to the front end of the front body part shell.

[0035] The bottom surface of the front groove and the middle groove is preferably a first group of concave circular arc cylindrical surfaces coaxial with the first ear hole. The outer surface of the overhanging end of the first ear seat and the outer surface of the overhanging end of the second ear seat are preferably a second group of convex circular arc cylindrical surfaces coaxial with the first ear hole. Correspondingly, the left and right rocker arms are also provided with a first group of convex circular arc cylindrical surfaces coaxial with the first ear hole and a second group of concave circular arc cylindrical surfaces coaxial with the first ear hole. When the left and right rocker arms are hinged to the front body part shell, the first group of convex circular arc cylindrical surfaces and the first group of concave circular arc cylindrical surfaces correspond one by one and leave a gap between each other, and the second group of convex circular arc cylindrical surfaces and the second group of concave circular arc cylindrical surfaces correspond one by one and leave a gap between each other. By controlling the size of the above gap within a suitable range, the accumulation of coal and rock into the rocker arm shell and the machine body during the up-down swinging of the rocker arm can be effectively controlled, and the smoothness of the swinging is ensured.

[0036] A wear-resistant sleeve is fixedly installed in the first ear hole and the second ear hole. When the rocker arm is hinged to the front body part shell, the wear-resistant sleeve can effectively protect the first ear hole and the second ear hole, and reduce the wear of the ear hole.

[0037] The output shaft of the cutting motor is a hollow shaft, and the core shaft of the clutch mechanism 23 passes through the hollow shaft from front to back and is connected with the key hole 241 of the front part of the input gear 24 through key connection. The power of the cutting motor is transmitted to the front cutting transmission mechanism through the clutch mechanism.

[0038] The rear part of the input gear 24 can also be provided with a key hole 242, which can be used to connect a gear pump 28 to provide a power source for the hydraulic system. Therefore, the hydraulic system does not need to additionally set up an independent power source, and the structure is more compact.

[0039] The rear end surface of the front body part shell is a large plane, which is a positioning surface for the fixed connection of the front body part shell and the rear body part shell. The large plane is also provided with at least two left and right positioning pin holes. The front and rear body part shells are fixedly connected through fasteners to form the machine body of the coal mining machine.

[0040] The positioning pin hole is fitted with a positioning pin 29 in one-to-one correspondence. The positioning pin is used to prevent the misalignment between the front and rear body part housings.

[0041] The positioning pin is preferably a hollow positioning pin, and the center through hole of the positioning pin is coaxial with the output gear on the same side. The front part of the output gear is preferably provided with a spline hole 251, which can be used as a connecting interface for transmitting power to the rear cutting transmission mechanism.

[0042] Further, the rear part of the output gear is preferably provided with a coaxial spline hole 252, which provides an external power output interface, for example, a crushing mechanism can be connected to provide power to the crushing mechanism. When connected, the power input end of the crushing mechanism can pass through the center through hole of the corresponding positioning pin and be connected to the spline hole 252.

[0043] The front body part housing is a multi-chamber structure, and the chambers include a motor chamber, a transmission chamber, a containing chamber 216, and a hydraulic chamber 217. The motor chamber and the transmission chamber are the middle inner chamber and the rear inner chamber, respectively. The containing chamber 216 is located in front of the hydraulic chamber 217, and both the containing chamber and the hydraulic chamber are located on the left or right side of the motor chamber. The adjacent chambers are separated by walls with a certain range of thickness. A filter 27 can also be provided in the hydraulic chamber. Since the front body part housing adopts a multi-chamber structure, the weight is greatly reduced, so the center of gravity of the machine body can be further moved backward, thereby further improving the stability of the coal mining machine.

[0044] The chamber can also include a wiring channel 219 that extends through the hydraulic chamber and the transmission chamber from front to back.

[0045] Unless otherwise specified, the front and back in this article refer to the direction close to the coal wall and the direction away from the coal wall, respectively.

Claims

1. A front main body of a compact coal mining machine for thin coal seams, characterized in that: The system includes a front main body housing. A cutting motor is installed in the central cavity of the front main body housing. A front-stage cutting transmission mechanism extends laterally from the rear cavity of the front main body housing. This front-stage cutting transmission mechanism includes two sets of fixed-axis gear transmission mechanisms, each consisting of an input gear, an idler gear set, and an output gear connected sequentially. The two sets of fixed-axis gear transmission mechanisms share a common input gear, which is coaxially connected to the output shaft of the cutting motor. The left and right edges of the front main body housing each have a first lug, a second lug, and a connecting base extending outwards. These lugs are arranged at intervals from front to back. A front groove is formed between the first and second lugs, and a middle groove is formed between the second lug and the connecting base. The front portions of the left and right sets of first and second lugs are respectively provided with... The front main body housing has a first and a second ear hole. The rear inner cavity of the front main body housing extends to the left and right ends of the connecting base. The output gears of the two sets of fixed-axis gear transmission mechanisms are located in the left and right connecting bases respectively. The first ear hole, the second ear hole and the output gear on the same side are coaxial. The lower part of the front main body housing is provided with a cylinder receiving cavity that extends to the left and right and opens downward. The cylinder receiving cavity and the cylinder outer receiving cavity provided on the housing of the corresponding side coal mining machine rocker arm together provide space for the swing of the corresponding side height adjustment cylinder. The outer end of the height adjustment cylinder is located in the cylinder outer receiving cavity. The front main body housing is a multi-chamber structure, in which the chambers include a motor cavity, a transmission cavity, a receiving cavity and a hydraulic cavity. The motor cavity and the transmission cavity are the middle inner cavity and the rear inner cavity respectively. The receiving cavity is located in front of the hydraulic cavity. The receiving cavity and the hydraulic cavity are both located on the left or right side of the motor cavity.

2. The front main body of the compact coal mining machine for thin coal seams as described in claim 1, characterized in that: The bottom surfaces of the front groove and the middle groove are configured as a first set of concave arc cylindrical surfaces coaxial with the first ear hole, and the outer surfaces of the overhanging ends of the first ear seat and the second ear seat are configured as a second set of convex arc cylindrical surfaces coaxial with the first ear hole.

3. The front main body of the compact coal mining machine for thin coal seams as described in claim 1, characterized in that: Wear-resistant sleeves are fixedly installed in both the first and second ear holes.

4. The front main body of the compact coal mining machine for thin coal seams as described in claim 1, characterized in that: The output shaft of the cutting motor is a hollow shaft. The spindle of a clutch mechanism passes through the hollow shaft from front to back and is coaxially splined with the front of the input gear.

5. The front main body of the compact coal mining machine for thin coal seams as described in claim 1, characterized in that: The rear end face of the front main body shell is a large flat surface, on which there are two positioning pin holes on the left and right sides.

6. The front main body of the compact coal mining machine for thin coal seams as described in claim 5, characterized in that: Positioning pins are installed in the positioning pin holes one by one, with each pin tightly fitted.

7. The front main body of the compact coal mining machine for thin coal seams as described in claim 6, characterized in that: The positioning pin is a hollow positioning pin, and the central through hole of the positioning pin is coaxial with the output end gear on the left and right sides.

8. The front main body of the compact coal mining machine for thin coal seams as described in claim 7, characterized in that: The rear of the output gear is provided with a coaxial spline hole for external power output interface, and the front of the output gear is provided with a spline hole for connecting interface for transmitting power to the subsequent cutting transmission mechanism.

9. The front main body of the compact coal mining machine for thin coal seams as described in claims 1, 2, 3, 4, 5, 6, 7, or 8, characterized in that: The chamber also includes a wiring channel that extends forward and backward through the hydraulic chamber and the transmission chamber.

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