Thin seam coal cutter main body

Abstract

The invention relates to a thin seam coal cutter main body, the front part of the main body shell is provided with first, second and third ear seats for hinged rocker arms from front to back, a front groove is formed between the first and second ear seats, a middle groove is formed between the second and third ear seats, a rear groove is formed between the third ear seat and the rear part of the main body shell, the ear holes of the first, second and third ear seats are coaxial, the rear part of the ear hole of the first ear seat, the front and rear parts of the ear hole of the second ear seat and the front part of the ear hole of the third ear seat are respectively provided with coaxial first, second, third and fourth circular recessed notches, the rear part of the main body shell is provided with left and right coal flow rear passages, the passages are grooves extending from front to back with notches facing down, the rear ends of the grooves are closed, the groove bottoms of the coal flow rear passages are high in front and low in rear. The invention can provide larger mining range and cutting power, and help shorten the machine body and improve the center of gravity of the coal cutter.

Description

Technical Field

[0001] This invention relates to a coal mining machine body, suitable for thin coal seam coal mining machines, which can be combined with a rocker arm of a specific structure to obtain a larger mining range and improve the center of gravity of the coal mining machine. Background Technology

[0002] The existing thin coal seam mining machines have complex overall structures for the upper suspension body and rocker arm sections, which brings with them several problems. For example, the rocker arm is usually equipped with an independent cutting motor, resulting in a long rocker arm and limited vertical swing range, leading to insufficient adaptability to mining height. Furthermore, the body section between the left and right drums is long and heavy due to the installation of open hydraulic cylinders, causing the center of gravity of the mining machine to shift towards the coal face. This results in operational instability and excessive wear on components such as the sliding shoes, severely impacting the overall performance of the machine.

[0003] In response to the above problems, the industry has proposed to divide the cutting part into a swinging part and a fixed part, and to set the main body of the cutting motor and cutting transmission system in the fixed part. However, this has resulted in an overly complex structure in the fixed part, with the left and right lengths of the overhanging section of the machine body being too long and the weight being too heavy. The problem of the center of gravity of the whole machine still has a significant impact on the stress on the whole machine. Summary of the Invention

[0004] The present invention aims to provide a main body of a thin coal seam mining machine that can provide a larger mining range and a larger cutting power, and also helps to shorten the machine body and improve the center of gravity of the mining machine.

[0005] The main technical solutions of this invention are as follows:

[0006] A main body of a thin coal seam mining machine includes a main body shell. At the left and right ends of the front part of the main body shell, a first ear seat, a second ear seat, and a third ear seat are provided sequentially from front to back for hinged rocker arms. 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 third ear seat, and a rear groove is formed between the third ear seat and the rear part of the main body shell. The ear holes of the first ear seat, the second ear seat, and the third ear seat are coaxial with each other. The rear part of the ear hole of the first ear seat, the front and rear parts of the ear hole of the second ear seat, and the front part of the ear hole of the third ear seat are respectively provided with a coaxial first circular recess, a second circular recess, a third circular recess, and a fourth circular recess.

[0007] The main body shell is a T-shaped structure that is narrow at the front and wide at the rear. The front part of the main body shell is a multi-chamber thin-walled frame structure, and the left and right parts of the rear part of the main body shell are solid structures.

[0008] The bottom of the front groove is configured as an opening structure communicating with an inner cavity of the main body shell, and the top and bottom edges of the opening are both configured as concave arc cylindrical surfaces coaxial with the ear hole of the second ear seat.

[0009] The groove bottom surface of the middle groove and the rear groove is arranged as an inner concave circular arc cylindrical surface coaxial with the ear hole of the second ear seat, and the outer surface of the overhanging end of the first ear seat, the second ear seat and the third ear seat is arranged as an outer convex circular arc cylindrical surface coaxial with the ear hole of the second ear seat.

[0010] The front part of the main body shell is provided with a front open oil cylinder mounting cavity, the front opening is closed by a cover plate, the cover plate is fixed on the main body shell, and the front groove is communicated with the oil cylinder mounting cavity through the opening structure of the groove bottom.

[0011] The oil cylinder mounting cavity is provided with two upper and lower oil cylinder hinging ears, and the two oil cylinder hinging ears are respectively located in the oil cylinder mounting cavity, the top plate and the bottom plate of the main body shell.

[0012] The rear part of the main body shell is provided with a hydraulic cavity and a pipeline channel.

[0013] The rear part of the main body shell is provided with two coal flow rear channels on the left and right, and the coal flow rear channel is a groove extending from front to back with a notch downward, the rear end of the groove is closed, and the groove bottom of the coal flow rear channel is high in front and low at the rear.

[0014] The rear part of the main body shell is also provided with an electrical cavity, and the electrical cavity is located between the left and right two coal flow rear channels and directly behind the front part of the main body shell.

[0015] The main body of the thin seam coal mining machine further comprises two cutting motors on the left and right, and the two cutting motors are fixed as hinging shafts in the first to fourth circular concave notches on the left and right, respectively.

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

[0017] The present application shortens the left and right lengths of the main body shell by integrally connecting the cutting motor as a rocker arm with the main body shell as a pin shaft, which also shortens the left and right lengths of the machine body section of the coal mining machine and simplifies the structure of the cutting mechanism.

[0018] The front arm, the main body shell, the cutting motor and the cover plate of the rocker arm can jointly form a closed cavity, which provides clean working space for the left and right height adjustment oil cylinders, the overall space is compact, the length of the machine body is short, and the rocker arm can be ensured not to be affected by coal and other mining materials during swinging with the extension and contraction of the height adjustment oil cylinders, which also ensures the normal swinging of the rocker arm between the highest and lowest limit swing angle positions, and finally ensures that the maximum mining range is not affected.

[0019] By arranging the left and right coal flow rear passages at the rear part of the main body shell, the coal flow is guided into the conveying groove of the conveyor located below the rear part of the main body shell, and the coal loading effect is improved.

[0020] Further, the coal flow is separated left and right by the support sliding shoe, which reduces the influence of the coal flow outside the center line of the drum on the coal flow inside when the coal mining machine moves. This structure, in combination with the coal flow rear passage, can facilitate the coal flow inside to enter the conveying groove, further improving the coal loading effect. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 is a top view of an embodiment of the main body of the present application;

[0022] Figure 2 is a side view of an embodiment of the main body of the present application; Figure 1 is a structural diagram of the main body shell 2;

[0023] Figure 3 is a B-B sectional view of the main body shell 2; Figure 2

[0024] Figure 4 is a B-B sectional view of the main body shell 2; Figure 2

[0025] Figure 5 is a side view of an embodiment of the main body of the present application;

[0026] Figure 6 is a structural diagram of an embodiment of the cutting motor.

[0027] REFERENCE NUMERALS:

[0028] 2. main body shell; 211. first circular recess; 212. second circular recess; 213. third circular recess; 214. fourth circular recess; 215. overhanging end outer surface of first lug; 216. top and bottom edges of opening; 216'. groove bottom surface of middle groove; 217. front groove; 218. middle groove; 219. rear groove; 22. oil cylinder mounting cavity; 221. oil cylinder hinged lug; 222. cover plate; 23. hydraulic cavity; 24. pipeline passage; 25. electrical cavity; 26. coal flow rear passage; 28. positioning connection surface; 29. solid structure;

[0029] ​​3. cutting motor; 31. first circular convex stop; 32. second circular convex stop; 33. third circular convex stop; 34. fourth circular convex stop;

[0030] 4. oil cylinder;

[0031] 5. support shoe;

[0032] 6. guide device;

[0033] 9. conveyor; 91. blade; 95. conveying groove. DETAILED DESCRIPTION

[0034] The present application discloses a kind of thin coal seam coal winning machine main part (can be simply referred to as main part), as shown in Fig. Figures 1-6 The left and right ends of the front part of main part shell are each formed by first ear seat, second ear seat and third ear seat for hinging rocker arm in sequence from front to back. Front groove 217 is formed between first ear seat and second ear seat, middle groove 218 is formed between second ear seat and third ear seat, and rear groove 219 is formed between third ear seat and the rear part of main part shell. The ear hole of first ear seat, the ear hole of second ear seat and the ear hole of third ear seat are coaxial with each other. The rear part of the ear hole of first ear seat, the front part and rear part of the ear hole of second ear seat and the front part of the ear hole of third ear seat are respectively provided with coaxial first circular concave stop 211, second circular concave stop 212, third circular concave stop 213 and fourth circular concave stop 214, and these circular concave stops are used for radial positioning of cutting motor 3. First to third ear seats and front, middle and rear grooves constitute rocker arm connecting structure.

[0035] The diameters of first circular concave stop, second circular concave stop, third circular concave stop and fourth circular concave stop are preferably reduced in sequence, so as to facilitate the installation of cutting motor into first to third ear seats of main part shell from front to back. First circular concave stop and second circular concave stop are the support of front arm of rocker arm, and third circular concave stop and fourth circular concave stop are the support of rear arm of rocker arm.

[0036] The main part shell is T-shaped structure with narrow front part and wide rear part, the front part of main part shell is multi-chamber thin-walled frame structure, which greatly reduces the weight of machine body section of coal winning machine, and the left and right parts of rear part of main part shell are solid structure, which balances the weight of swing arm of whole machine. Such machine body structure can make the gravity center of coal winning machine move backward, thereby improving the stress stability of whole machine.

[0037] The bottom of the front groove is provided with an opening structure communicating with an inner cavity of the main body shell, and the top and bottom edges of the opening are provided with inner concave circular cylindrical surfaces coaxial with the ear hole of the second ear seat. The front groove is used to form a hinge with the front arm (part of the hinge structure) on the rocker arm, and the outer surface of the overhanging end of the front arm is coaxially and slidingly fitted with the top and bottom edges, thereby ensuring the relative swinging of the two and maintaining the cleanliness of the inner cavity of the main body shell. An oil cylinder hinge seat can be arranged on the overhanging end of the front arm, and in the installed state, the oil cylinder hinge seat extends into the inner cavity of the main body shell.

[0038] The bottom surface 216' of the middle groove and the bottom surface of the rear groove are provided with inner concave circular cylindrical surfaces coaxial with the ear hole of the second ear seat, and the outer surface of the overhanging end of the first ear seat, the outer surface of the overhanging end of the second ear seat and the outer surface of the overhanging end of the third ear seat are provided with outer convex circular cylindrical surfaces coaxial with the ear hole of the second ear seat. This structure is used to form a hinge connection structure with the rocker arm of the coal mining machine, and at the same time, an equal-width interval can be reserved between the mutually close side surfaces of the rocker arm and the main body shell. By controlling the interval within a suitable range, the accumulation of coal and rock into the interval between the rocker arm and the main body shell during the rotation of the rocker arm relative to the main body shell 2 can be effectively controlled to prevent the rocker arm from being stuck, thereby ensuring the free swinging of the rocker arm.

[0039] The front part of the main body shell is provided with a front open oil cylinder mounting cavity 22, and the front opening is closed by a cover plate 222 fixed on the main body shell. The front groove communicates with the oil cylinder mounting cavity through the opening structure of the groove bottom.

[0040] The oil cylinder mounting cavity provides a clean installation and operation space for the height adjustment oil cylinder 4, valve group, filter and the like, prolongs the service life of the oil cylinder and improves the working reliability of the oil cylinder. The oil cylinder mounting cavity is provided with two oil cylinder hinge ears 221 arranged on the top plate and the bottom plate of the main body shell. The two oil cylinder hinge ears are preferably arranged at the left and right central positions in the oil cylinder mounting cavity. The oil cylinder mounting cavity is used to accommodate two oil cylinders, one end of each of the two oil cylinders is hingedly connected to the left and right rocker arms, and the other end is connected to the oil cylinder hinge ears. When the other ends of the two oil cylinders are hingedly connected to the oil cylinder hinge ears on the top plate, the two oil cylinders can form an inverted V shape; when the other ends of the two oil cylinders are hingedly connected to the oil cylinder hinge ears on the bottom plate, the two oil cylinders can form a V shape; and when the other ends of the two oil cylinders are hingedly connected to the oil cylinder hinge ears on the top plate and the bottom plate respectively, the two oil cylinders are arranged in a nearly parallel inclined state. According to the different rotation directions of the drum, the oil cylinders can be flexibly replaced in the above-mentioned installation modes to adapt to different stress states of the drum rotating inward or outward, thereby avoiding the upward floating of the entire drum caused by excessive cutting force and high traction speed. When the two oil cylinders are installed in a nearly parallel inclined state, the left and right lengths of the front part of the main body shell can be further shortened.

[0041] The front part of the main body shell can also be provided with hydraulic chambers 23 and pipeline passages 24 behind the oil cylinder mounting cavity. There are two hydraulic chambers on the left and right, and the pipeline passage is located between the two hydraulic chambers.

[0042] The rear part of the main body shell is provided with two coal flow rear passages 26 on the left and right. The coal flow rear passage is a groove extending from front to back with the notch facing down. The rear end of the groove is closed, and the groove bottom of the coal flow rear passage is high in front and low at the back. After the main body shell is applied to the coal mining machine, the coal flow rear passage can guide the coal flow into the conveying groove 95 of the conveyor 9 located below the rear part of the main body shell, improving the coal loading effect.

[0043] The rear part of the main body shell can also be provided with an electrical chamber 25 for mounting an electrical control system. The electrical chamber is located between the two coal flow rear passages and directly behind the front part of the main body shell. The electrical chamber can have multiple chambers spaced apart from each other. The rear part of the main body shell is basically a solid structure 29 except for the electrical chamber and the coal flow rear passage.

[0044] The rear side of the left and right ends of the rear part of the main body shell, as well as the left side of the left end and the right side of the right end, are all set as positioning connection surfaces 28. The rear side is used to mount the guide device 6, and the left and right sides are used to mount the support shoes 5. The bottom of the support shoes 5 is supported on the shovel plate 91 of the conveyor 9. The support shoes are used to separate the coal flow left and right, reducing the influence of the coal flow outside the drum center line on the coal flow inside when the coal mining machine moves. This structure, combined with the coal flow rear passage, can facilitate the coal flow on the inside to enter the conveying groove, further improving the coal loading effect.

[0045] The main body of the thin seam coal mining machine can also include two cutting motors on the left and right. The two cutting motors are fixed as hinged shafts in the first, second, third, and fourth circular concave notches on the left and right. The outer shell of the cutting motor 3 is provided with a first, second, third, and fourth circular convex notch 31, 32, 33, and 34 in sequence from front to back. Each circular convex notch is provided with a sealing groove, and a sealing ring is arranged in the sealing groove. The first to fourth circular convex notches correspond to the first to fourth circular concave notches on the same side on the left and right.

[0046] The main body shell is a left-right symmetrical structure.

[0047] Unless otherwise specified, the front and back in this article refer to the direction close to the coal wall and away from the coal wall, respectively.

Claims

1. A thin seam coal cutter main body portion characterized by: The utility model relates to a cutting machine, including main part shell and two cutting motors, the front of main part shell is provided with first ear seat, second ear seat and third ear seat for hinging rocker arm from front to back, the front recess is formed between first ear seat and second ear seat, the middle recess is formed between second ear seat and third ear seat, the rear recess is formed between third ear seat and the rear of main part shell, the ear hole of first ear seat, second ear seat and third ear seat are coaxial, the rear of the ear hole of first ear seat, the front and rear of the ear hole of second ear seat and the front of the ear hole of third ear seat are provided with coaxial first circular recess, second circular recess, third circular recess and fourth circular recess for radial positioning and installing cutting motor, the cutting motor is used as the pin shaft of the hinge of rocker arm and main part shell, two cutting motors are fixed in first circular recess, second circular recess, third circular recess and fourth circular recess respectively, the shell of cutting motor is provided with first circular convex stop, second circular convex stop, third circular convex stop and fourth circular convex stop from front to back, each circular convex stop is provided with sealing groove, sealing ring is arranged in sealing groove, first to fourth circular convex stop and first to fourth circular recess on the same side are matched tightly, the front of main part shell is provided with the oil cylinder installation cavity of front open, the front open is closed by the cover plate, the cover plate is fixed on main part shell, the front recess is communicated with the oil cylinder installation cavity through the opening structure of groove bottom, the oil cylinder installation cavity is provided with two oil cylinder hinge ears, and the two oil cylinder hinge ears are located in the oil cylinder installation cavity, the top plate and the bottom plate of main part shell.

2. A thin seam coal cutter main body portion as claimed in claim 1, characterized by: The main part shell is a T-shaped structure with a narrow front part and a wide rear part, the front part of the main part shell is a multi-chamber thin-walled frame structure, and the left and right parts of the rear part of the main part shell are solid structures.

3. A thin seam coal cutter main body as claimed in claim 2, characterised in that: The bottom of the front recess is provided with an opening structure communicating with an inner chamber of the main part shell, and the top and bottom edges of the opening are provided with inner concave arc cylindrical surfaces coaxial with the ear hole of the second ear seat.

4. A thin seam coal cutter main unit according to claim 3, characterised in that: The bottoms of the middle recess and the rear recess are provided with inner concave arc cylindrical surfaces coaxial with the ear hole of the second ear seat, and the outer surfaces of the overhanging ends of the first ear seat, the second ear seat, and the third ear seat are provided with outer convex arc cylindrical surfaces coaxial with the ear hole of the second ear seat.

5. A thin seam coal cutter unit as claimed in claim 4 wherein: The front part of the main part shell is provided with a hydraulic chamber and a pipeline channel behind the oil cylinder installation cavity.

6. A thin seam coal cutter main unit according to claim 1, 2, 3, 4 or 5, characterised in that: The rear part of the main part shell is provided with a coal flow rear channel on each side, which is a recess extending from front to back with a notch facing down, the rear end of the recess is closed, and the bottom of the coal flow rear channel is higher in front and lower at the rear.

7. A thin seam coal cutter unit body as claimed in claim 6 wherein: The rear part of the main part shell is also provided with an electrical chamber located between the two coal flow rear channels and directly behind the front part of the main part shell.

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