Cutting chain type transverse shaft type cutting mechanism suitable for coal roadway and half coal rock roadway and heading machine

Abstract

The invention discloses a cutting chain type transverse shaft type cutting mechanism suitable for a coal roadway and a half-coal-rock roadway and a heading machine. The cutting mechanism comprises a main machine frame, a motor, a cutting chain, a left cutting head and a right cutting head, the motor, the cutting chain, the left cutting head and the right cutting head are installed on the main machine frame, the left cutting head and the right cutting head are located on the two sides of the cutting chain respectively, and the motor drives the cutting chain to rotate and drives the left cutting head and the right cutting head to rotate; wherein a plurality of middle cutting teeth are distributed on the cutting chain; a plurality of left cutting teeth are distributed on the left cutting head; a plurality of right cutting teeth are distributed on the right cutting head; at least part of the middle cutting picks are matched with the left cutting picks to form a spiral line shape, and at least part of the middle cutting picks are matched with the right cutting picks to form a V shape. The problem that an existing cutting mechanism is low in cutting efficiency is solved.

Description

Technical Field

[0001] The present invention belongs to the technical field of cantilever type roadheader cutting head design, and in particular relates to a chain-type horizontal axis cutting mechanism and a roadheader suitable for coal roadway and semi-coal-rock roadway. Background Art

[0002] The cutting mechanism of coal mine full-rock tunneling machine is mainly divided into horizontal axis cutting mechanism and vertical axis cutting mechanism. Compared with the vertical axis cutting mechanism, the horizontal axis cutting mechanism can make full use of the weight of the whole machine when cutting the whole rock, the whole machine has good stability, can maximize the cutting ability, and has a fast cutting speed; at the same time, the external spray can efficiently cool the cutting teeth, the cutting teeth wear rate is low, the consumption is low, and it has advantages that the vertical axis type cannot match. There are reports comparing the vertical and horizontal cutting capabilities of the same full-rock tunnel in domestic coal mines. The cutting speed of the horizontal axis is 2-4 times that of the vertical axis. Therefore, tunneling machines with horizontal axis cutting mechanisms will be more and more widely used in full-rock tunnels.

[0003] However, in the actual cutting of all-rock tunnels, it was found that the horizontal-axis cutting mechanism, due to its own structural characteristics, uses two cutting heads placed on both sides of the cutting reducer. Limited by the reducer structure, there is a part of space in the middle where the cutting teeth cannot be arranged. As a result, the left and right cutting heads need to swing left and right when cutting all-rock to meet the feed requirements. Otherwise, the outer casing of the middle reducer will support the front coal and rock, making it impossible to feed the cutter, resulting in low feed efficiency of the horizontal-axis cutting mechanism and affecting the excavation advance speed. Summary of the invention

[0004] The purpose of the present disclosure is to provide a chain-type horizontal-axis cutting mechanism and a roadheader suitable for coal tunnels and semi-coal-rock tunnels, which can solve at least part of the above-mentioned technical problems.

[0005] The first aspect of the disclosed embodiment provides a chain-type horizontal-axis cutting mechanism suitable for coal lanes and semi-coal-rock lanes, the cutting mechanism comprising a main frame and a motor, a chain-type cutting chain, a left cutting head and a right cutting head installed on the main frame, the left cutting head and the right cutting head are respectively located on both sides of the chain-type cutting chain, the motor drives the chain-type cutting chain to rotate, and drives the left cutting head and the right cutting head to rotate; wherein, a plurality of middle cutting teeth are distributed on the chain-type cutting chain; a plurality of left cutting teeth are distributed on the left cutting head; a plurality of right cutting teeth are distributed on the right cutting head; at least part of the plurality of middle cutting teeth cooperate with the plurality of left cutting teeth to form a spiral shape, and at least part of the middle cutting teeth cooperate with the plurality of right cutting teeth to form a V-shape.

[0006] The main technical effects achieved by the embodiments of the present disclosure are as follows: the cutting mechanism in the present disclosure first solves the difficult problem that the existing full-rock tunneling machine needs to swing the cutting mechanism left and right during a single feed in order to avoid the problem that the intermediate reducer housing presses against the front coal rock, thereby increasing the single feed amount, reducing the left and right swing feed time, and greatly improving the cutting efficiency; secondly, at least part of the multiple middle picks cooperate with the multiple left picks to form a spiral line shape, that is, the cutting direction of the middle picks of this part is consistent with the cutting direction of the picks of the left cutting head, forming a spiral connection to reduce greater cutting resistance and maximize the cutting efficiency; finally, at least part of the multiple middle picks cooperate with the multiple right picks to form a V-shape, which can increase the contact area between the picks and the coal rock, thereby enhancing the cutting force, so that the coal rock can be better crushed during cutting, the coal rock crushing effect is improved, and subsequent transportation and processing are convenient.

[0007] Optionally, the multiple middle picks include a plurality of first pick bars and a plurality of second pick bars distributed in parallel, and the plurality of first pick bars and the plurality of second pick bars are alternately distributed in sequence, one of the plurality of first pick bars cooperates with the plurality of left picks to form a spiral shape, and one of the plurality of second pick bars cooperates with the plurality of right picks to form a V-shape.

[0008] The main technical effects achieved by the embodiments of the present disclosure are as follows: through the alternating arrangement of the first pick bar and the second pick bar distributed in parallel, the cutting mechanism can adapt to coal and rock formations of different hardness and structure, because the alternating pick bar can better adapt to the changes in the coal and rock formations; the first pick bar cooperates with the left pick to form a spiral shape, and the second pick bar cooperates with the right pick to form a V shape. This cooperation method improves the continuity and efficiency of cutting, while reducing the wear of the pick.

[0009] Optionally, during the rotation of the cutting chain, the left cutting head and the right cutting head, the plurality of first cutting tooth bars cooperate with the plurality of left cutting teeth in sequence to form a spiral shape, and the plurality of second cutting tooth bars cooperate with the plurality of right cutting teeth in sequence to form a V shape.

[0010] The main technical effects achieved by the disclosed embodiments are as follows: during the rotation of the cutting chain, the left cutting head and the right cutting head, the first cutting tooth bar and the second cutting tooth bar cooperate with the left cutting tooth and the right cutting tooth in sequence, ensuring the continuity of the cutting process and reducing the cutting gap; the cutting tooth bars and cutting teeth that cooperate in sequence can more accurately control the cutting depth and shape, which is particularly important for projects that require precise control of the cutting shape; due to the sequential cooperation of the cutting tooth bars and cutting teeth, the wear of the cutting teeth can be more evenly distributed, thereby extending the service life of the cutting teeth.

[0011] Optionally, the number of picks in the first pick bar is greater than the number of picks in the second pick bar.

[0012] The main technical effects achieved by the embodiments of the present disclosure are as follows: the difference in the number of picks in different pick bars can optimize the distribution of the picks, making the cutting force more uniform, reducing excessive reliance on a single pick, thereby reducing wear and increasing the service life of the picks.

[0013] Optionally, the extension direction of the first pick tooth bar and the second pick tooth bar is inclined relative to the rotation direction of the pick chain.

[0014] The main technical effect achieved by the embodiment of the present disclosure is that the first cutting tooth bar and the second cutting tooth bar are arranged obliquely relative to the rotation direction of the cutting chain. This design helps to reduce the cutting resistance and improve the cutting efficiency.

[0015] Optionally, the cutter chain includes a plurality of chain plates hinged to each other, and the plurality of middle picks are respectively mounted on the plurality of chain plates.

[0016] The main technical effects achieved by the disclosed embodiments are as follows: the cutter chain is composed of a plurality of hinged chain plates, and the middle cutting teeth are mounted on the chain plates. This structure improves the flexibility and durability of the cutter chain, and facilitates cutting operations in complex coal and rock environments.

[0017] Optionally, the chain plate includes a plate body, a first raised plate, a second raised plate located on one side of the plate body, and a third raised plate, a fourth raised plate and a fifth raised plate located on the other side of the plate body, wherein the first raised plate and the second raised plate in one of two adjacent chain plates and the third raised plate, the fourth raised plate and the fifth raised plate in the other chain plate are alternately arranged with each other.

[0018] The main technical effects achieved by the disclosed embodiments are as follows: the design of the chain plates enables the raised plates between adjacent chain plates to be arranged alternately, and this structure enhances the connection strength and stability of the chain plates, while also facilitating the assembly and maintenance of the chain plates.

[0019] Optionally, the left cutting head is formed by welding an inner spline sleeve and an outer head body at the bottom and top grooves, wherein two reinforcing ribs in the outer head body are mechanically matched with the outer circle of the inner spline sleeve, and the front end of the inner spline sleeve is a hollow structure.

[0020] The main technical effects achieved by the disclosed embodiment are as follows: the left cutting head is welded by an inner spline sleeve and an outer head body, the reinforcing ribs are mechanically matched with the outer circle of the inner spline sleeve, and the hollow structure at the front end of the inner spline sleeve improves the seismic resistance and lightweight of the cutting head, thereby improving the cutting efficiency and durability.

[0021] Optionally, the right cutting head has the same structure as the left cutting head and is symmetrically arranged relative to the left cutting head.

[0022] The main technical effects achieved by the disclosed embodiment are as follows: the right cutting head and the left cutting head have the same structure and are symmetrically arranged. This symmetrical design helps to maintain the balance of the cutting mechanism and improve the stability and efficiency of cutting.

[0023] A second aspect of the disclosed embodiment provides a roadheader, which includes a chain-type horizontal-axis cutting mechanism suitable for coal tunnels and semi-coal-rock tunnels as described above.

[0024] The main technical effects achieved by the disclosed embodiments are as follows: the roadheader is equipped with the above-mentioned chain-type horizontal-axis cutting mechanism, so that the roadheader can adapt to the complex environment of coal tunnels and semi-coal-rock tunnels, thereby improving the roadheading efficiency and cutting effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a structural schematic diagram of a chain-type horizontal axis cutting mechanism suitable for coal lanes and semi-coal-rock lanes;

[0026] Figure 2 It is a side view of a chain-type horizontal axis cutting mechanism suitable for coal lanes and semi-coal-rock lanes;

[0027] Figure 3 It is a schematic diagram of the structure of a left-cutting head;

[0028] Figure 4 It is a schematic diagram of the top view structure of a left-cutting head;

[0029] Figure 5 It is a schematic diagram of the cross-sectional structure of a left-cutting head;

[0030] Figure 6 It is a structural schematic diagram of a chain plate;

[0031] Figure 7 A schematic diagram of the arrangement of pick teeth on a pick chain.

[0032] Explanation of the reference numerals in the accompanying drawings: 1. left cutting head; 2. cutting chain; 3. right cutting head; 4. cutting motor; 5. cutting reducer; 6. frame; 7. long hexagon socket bolt; 8. internal spline sleeve; 9. outer head body; 11. left cutting tooth; 21. middle cutting tooth; 31. right cutting tooth; 22. first cutting tooth bar; 23. second cutting tooth bar; 12. cylindrical pin; 13. chain plate; 14. pin shaft; 131. plate body; 132. first raised plate; 133. second raised plate; 134. third raised plate; 135. fourth raised plate; 136. fifth raised plate. DETAILED DESCRIPTION

[0033] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The modes described in the following exemplary embodiments do not represent all modes consistent with the present disclosure. Instead, they are merely examples of devices consistent with some aspects of the present disclosure as detailed in the appended claims.

[0034] The terms used in the present disclosure are only for the purpose of describing specific embodiments and are not intended to limit the present disclosure. Unless otherwise defined, the technical terms or scientific terms used in the present disclosure should be understood by people with ordinary skills in the field to which the present disclosure belongs. The words "first", "second" and similar words used in the present disclosure specification and claims do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, similar words such as "one" or "one" do not indicate a quantitative limitation, but indicate that there is at least one, and if only "one" is referred to, it will be separately described. "Multiple" or "several" means two or more. Unless otherwise specified, similar words such as "front", "rear", "lower" and / or "upper" are only for the convenience of explanation, and are not limited to one position or one spatial orientation. Similar words such as "include" or "comprise" mean that the elements or objects appearing in front of "include" or "comprise" cover the elements or objects listed after "include" or "comprise" and their equivalents, and do not exclude other elements or objects. "Connected" or "connected" and similar words are not limited to physical or mechanical connections, and may include electrical connections, whether direct or indirect. The singular forms "a", "said" and "the" used in this disclosure and the appended claims are also intended to include the plural forms, unless the context clearly indicates otherwise. It should also be understood that the term "and / or" used herein refers to and includes any or all possible combinations of one or more of the associated listed items.

[0035] like Figure 1-2 As shown, the disclosed embodiment provides a chain-cutting 2 type horizontal axis cutting mechanism suitable for coal tunnels and semi-coal-rock tunnels, the cutting mechanism comprising a main frame 6 and a motor, a chain-cutting 2, a left cutting head 1 and a right cutting head 3 installed on the main frame 6, the left cutting head 1 and the right cutting head 3 are respectively located on both sides of the chain-cutting 2, the motor drives the chain-cutting 2 to rotate, and drives the left cutting head 1 and the right cutting head 3 to rotate; wherein, a plurality of middle cutting teeth 21 are distributed on the chain-cutting 2; a plurality of left cutting teeth 11 are distributed on the left cutting head 1; a plurality of right cutting teeth 31 are distributed on the right cutting head 3; at least part of the plurality of middle cutting teeth 21 cooperate with the plurality of left cutting teeth 11 to form a spiral shape, and at least part of the middle cutting teeth 21 cooperate with the plurality of right cutting teeth 31 to form a V-shape.

[0036] The cutting mechanism disclosed in the present invention first solves the difficult problem that the existing full-rock tunneling machine needs to swing the cutting mechanism left and right during a single feed in order to avoid the problem that the intermediate reducer casing presses against the front coal rock, thereby increasing the single feed amount, reducing the left and right swing feed time, and greatly improving the cutting efficiency; secondly, at least part of the multiple middle picks 21 cooperate with the multiple left picks 11 to form a spiral line shape, that is, the cutting direction of the middle picks 21 of this part is consistent with the cutting direction of the picks of the left cutting head 1, forming a spiral connection to reduce greater cutting resistance and maximize the cutting efficiency; finally, at least part of the multiple middle picks 21 cooperate with the multiple right picks 31 to form a V-shape, which can increase the contact area between the picks and the coal rock, thereby enhancing the cutting force, so that the coal rock can be better crushed during cutting, the coal rock crushing effect is improved, and subsequent transportation and processing are convenient.

[0037] like Figure 3-5 As shown, the left cutting head 1 and the right cutting head 3 are installed on the left and right sides of the front end of the frame 6 through a spline connection and a long hexagon socket bolt 7, and the cutting chain 2 is installed in the middle of the frame 6. The left cutting head 1, the cutting chain 2, and the right cutting head 3 are driven to rotate through the cutting motor 4 and the cutting reducer 5 installed on the left and right sides of the rear end of the frame 6. The structures and cutting teeth included in the left cutting head 1, the right cutting head 3, and the cutting chain 2 are arranged symmetrically with the center line of the frame 6 as the axis. The left cutting head 1, the cutting chain 2, and the right cutting head 3 are driven to rotate through the cutting motor 4 and the cutting reducer 5 installed on the left and right sides of the rear end of the frame 6 through the guide drive device in the frame 6. During the rotation of the left cutting head 1, the cutting chain 2, and the right cutting head 3, coal and rock cutting can be achieved through the cutting teeth.

[0038] The teeth of the left cutting head 1 are arranged in accordance with the design concept of multiple teeth per line at the two ends (the tail and top of the cutting head body), one tooth per line in the middle (the part outside the tail and top of the cutting head), and a large intercept (cutting spacing). The arrangement is welded on the surface of the outer head body 9 of the cutting head in a spiral line arrangement. 14 tooth seats and 14 left cutting teeth 11 are distributed on each spiral line. A tooth seat is welded on the top of the inner spline sleeve 8 of the left cutting head 1 and a left cutting tooth 11 is installed. Special:

[0039] Different from the conventional horizontal axis cutting head with more teeth in the four spiral lines, the left cutting head 1 and the right cutting head 3 in this embodiment use double spiral lines and large-intercept teeth for the first time, so as to achieve the scope of applicable coal lane and semi-coal rock lane cutting operations in coal mines. The large-intercept and the middle part of the cutting head body use one-line-one-tooth arrangement, the purpose is to facilitate the timely discharge of coal and rock debris and maximize the coal and rock crushing effect. The use of one-line-multiple-teeth at both ends of the cutting head body can reduce the stress and wear of the cutting teeth.

[0040] The left cutting head 1 and the right cutting head 3 are welded by the inner spline sleeve 8 and the outer head body 9 at the bottom and top grooves. Among them, the root reinforcement ribs in the outer head body 9 and the outer circle of the inner spline sleeve 8 are mechanically matched to enhance the anti-seismic performance of the cutting head, and the front end of the inner spline sleeve 8 is also changed from solid to hollow to achieve a lightweight design of a large-diameter cutting head body.

[0041] like Figure 6 and Figure 7 As shown, as an optional embodiment, the plurality of middle picks 21 include a plurality of first pick teeth bars 22 and a plurality of second pick teeth bars 23 distributed in parallel, the plurality of first pick teeth bars 22 and the plurality of second pick teeth bars 23 are alternately distributed in sequence, one of the plurality of first pick teeth bars 22 cooperates with the plurality of left pick teeth 11 to form a spiral line, and one of the plurality of second pick teeth bars 23 cooperates with the plurality of right pick teeth 31 to form a V-shape. By the alternating arrangement of the first pick teeth bars 22 and the second pick teeth bars 23 distributed in parallel, the cutting mechanism can adapt to coal and rock formations of different hardness and structure, because the alternating pick teeth bars can better adapt to the changes in the coal and rock formations; the first pick teeth bars 22 cooperate with the left pick teeth 11 to form a spiral line, and the second pick teeth bars 23 cooperate with the right pick teeth 31 to form a V-shape. This cooperation mode improves the continuity and efficiency of cutting, while reducing the wear of the pick teeth.

[0042] In the process of the rotation of the cutting chain 2, the left cutting head 1 and the right cutting head 3, a plurality of first cutting tooth bars 22 are matched with a plurality of left cutting teeth 11 in sequence to form a spiral line shape, and a plurality of second cutting tooth bars 23 are matched with a plurality of right cutting teeth 31 in sequence to form a V shape. In the process of the rotation of the cutting chain 2, the left cutting head 1 and the right cutting head 3, the first cutting tooth bars 22 and the second cutting tooth bars 23 are matched with the left cutting teeth 11 and the right cutting teeth 31 in sequence, ensuring the continuity of the cutting process and reducing the cutting gap; the cutting tooth bars and cutting teeth matched in sequence can more accurately control the cutting depth and shape, which is particularly important for projects that require precise control of the cutting shape; due to the sequential matching of the cutting tooth bars and cutting teeth, the wear of the cutting teeth can be more evenly distributed, extending the service life of the cutting teeth.

[0043] As an optional embodiment, the number of picks in the first pick bar 22 is greater than the number of picks in the second pick bar 23. The difference in the number of picks 21 in different pick bars can optimize the distribution of the picks, making the cutting force more uniform, reducing excessive reliance on a single pick, thereby reducing wear and increasing the service life of the picks.

[0044] As an optional embodiment, the cutter chain 2 includes a plurality of hinged chain plates 13, and a plurality of middle picks 21 are respectively installed on the plurality of chain plates 13. The cutter chain 2 is composed of a plurality of hinged chain plates 13, and the middle picks 21 are installed on the chain plates 13. This structure improves the flexibility and durability of the cutter chain 2, and facilitates cutting operations in complex coal and rock environments. Specifically, Figure 6 As shown, the chain plate 13 includes a plate body 131, a first protruding plate 132 and a second protruding plate 133 located on one side of the plate body 131, and a third protruding plate 134, a fourth protruding plate 135 and a fifth protruding plate 136 located on the other side of the plate body 131, wherein the first protruding plate 132 and the second protruding plate 133 in one of the two adjacent chain plates 13 and the third protruding plate 134, the fourth protruding plate 135 and the fifth protruding plate 136 in the other chain plate 13 are arranged alternately with each other. The design of the chain plate 13 enables the protruding plates between adjacent chain plates 13 to be arranged alternately, and this structure enhances the connection strength and stability of the chain plate 13, and also facilitates the assembly and maintenance of the chain plate 13.

[0045] Specifically, the arrangement of the middle picks 21 on the cutting chain 2 adopts a single-side inclined, one-line-one-tooth design, and adopts a 5-4-5-4-5 cycle of adjacent single-side inclined 5 middle picks 21, 4 middle picks 21, 5 middle picks 21, etc., such as Figure 7 As shown, a total of 23 chain plates 13, tooth seats, pick teeth 11, etc. are composed. At the same time, the unilaterally inclined cutting direction of the cutter chain 2 is consistent with the cutting direction of the left pick teeth 11 of the left cutter head 1, forming a spiral connection to reduce greater cutting resistance and maximize cutting efficiency. At the same time, the chain plates 13 and the pin shafts 14 are fixed by cylindrical pins 12, which is convenient for disassembly and replacement.

[0046] The second aspect of the disclosed embodiment provides a roadheader, which includes a chain-cutting 2-type horizontal axis cutting mechanism suitable for coal roadway and semi-coal-rock roadway as described above. The roadheader is equipped with the chain-cutting 2-type horizontal axis cutting mechanism, so that the roadheader can adapt to the complex environment of coal roadway and semi-coal-rock roadway, and improves the driving efficiency and cutting effect.

[0047] The above are only preferred embodiments of the present disclosure and are not intended to limit the present disclosure. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present disclosure should be included in the scope of protection of the present disclosure.

Claims

1. A chain-type horizontal axis cutting mechanism suitable for coal lanes and semi-coal-rock lanes, characterized in that: The cutting mechanism includes a main frame and a motor, a cutting chain, a left cutting head and a right cutting head installed on the main frame, wherein the left cutting head and the right cutting head are respectively located on both sides of the cutting chain, and the motor drives the cutting chain to rotate, and drives the left cutting head and the right cutting head to rotate; wherein, a plurality of middle cutting teeth are distributed on the cutting chain; a plurality of left cutting teeth are distributed on the left cutting head; a plurality of right cutting teeth are distributed on the right cutting head; at least part of the plurality of middle cutting teeth cooperate with the plurality of left cutting teeth to form a spiral shape, and at least part of the middle cutting teeth cooperate with the plurality of right cutting teeth to form a V shape.

2. A chain-type horizontal axis cutting mechanism suitable for coal lanes and semi-coal-rock lanes according to claim 1, characterized in that: The multiple middle picks include a plurality of first pick bars and a plurality of second pick bars distributed in parallel, and the plurality of first pick bars and the plurality of second pick bars are alternately distributed in sequence, one of the plurality of first pick bars cooperates with the plurality of left picks to form a spiral shape, and one of the plurality of second pick bars cooperates with the plurality of right picks to form a V shape.

3. The chain-type horizontal axis cutting mechanism suitable for coal lanes and semi-coal-rock lanes according to claim 2 is characterized in that: During the rotation of the cutting chain, the left cutting head and the right cutting head, the first cutting tooth bars cooperate with the left cutting teeth in sequence to form a spiral shape, and the second cutting tooth bars cooperate with the right cutting teeth in sequence to form a V shape.

4. The chain-type horizontal axis cutting mechanism suitable for coal lanes and semi-coal-rock lanes according to claim 2 is characterized in that: The number of picks in the first pick bar is greater than the number of picks in the second pick bar.

5. The chain-type horizontal axis cutting mechanism suitable for coal lanes and semi-coal-rock lanes according to claim 2 is characterized in that: The extension directions of the first pick-tooth bar and the second pick-tooth bar are arranged obliquely relative to the rotation direction of the pick-tooth chain.

6. The chain-type horizontal axis cutting mechanism suitable for coal lanes and semi-coal-rock lanes according to claim 1 is characterized in that: The cutter chain comprises a plurality of chain plates hinged to each other, and the plurality of middle picks are respectively mounted on the plurality of chain plates.

7. A chain-type horizontal axis cutting mechanism suitable for coal lanes and semi-coal-rock lanes according to claim 6, characterized in that: The chain plate includes a plate body, a first raised plate and a second raised plate located on one side of the plate body, and a third raised plate, a fourth raised plate and a fifth raised plate located on the other side of the plate body, wherein the first raised plate and the second raised plate in one of two adjacent chain plates and the third raised plate, the fourth raised plate and the fifth raised plate in the other chain plate are alternately arranged with each other.

8. The chain-type horizontal axis cutting mechanism applicable to coal lanes and semi-coal-rock lanes according to claim 1 is characterized in that: The left cutting head is formed by welding an inner spline sleeve and an outer head body at the grooves at the bottom and top, wherein two reinforcing ribs in the outer head body are mechanically matched with the outer circle of the inner spline sleeve, and the front end of the inner spline sleeve is a hollow structure.

9. The chain-type horizontal axis cutting mechanism applicable to coal lanes and semi-coal-rock lanes according to claim 1 is characterized in that: The right cutting head has the same structure as the left cutting head and is symmetrically arranged relative to the left cutting head.

10. A tunnel boring machine, characterized in that: The tunnel boring machine comprises a chain-type horizontal-axis cutting mechanism suitable for coal tunnels and semi-coal-rock tunnels as described in any one of claims 1-9.

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