Shortened cutting chain type transverse shaft type cutting head and heading machine

Abstract

The invention discloses a shortened cutting chain type transverse shaft type cutting head and a heading machine. The cutting mechanism comprises a rack as well as a motor, a cutting chain, a left cutting head and a right cutting head which are mounted on the rack, and the motor drives the cutting chain to rotate so as to drive the left cutting head and the right cutting head to rotate; wherein a plurality of first left cutting teeth and a plurality of first right cutting teeth are distributed on the cutting chain; a plurality of second left cutting teeth are distributed on the left cutting head; a plurality of second right cutting teeth are distributed on the right cutting head; the total width of the left cutting head and the right cutting head is M, the total width of the motor is N, and M is smaller than N. Due to the compact design, the cutting head has higher adaptability in narrow roadways or complex geological conditions, cutting dead angles caused by space limitation are reduced, and the tunneling efficiency is improved. The compact cutting head design is favorable for optimizing the gravity center distribution of the cutting mechanism, so that the cutting mechanism is more stable in the tunneling process, vibration and swing are reduced, and the cutting precision and the roadway forming quality are improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of underground coal mine transportation equipment, and in particular relates to a shortened chain-cutting horizontal-axis cutting head and a tunneling machine. 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 object of the present disclosure is to provide a shortened chain-cutting horizontal-axis cutting head and a roadheader, which can solve at least part of the above-mentioned technical problems.

[0005] The first aspect of the disclosed embodiment provides a shortened chain-type horizontal-axis cutting head, the cutting mechanism comprising a frame and a motor, a chain-type cutting head, a left cutting head and a right cutting head installed on the 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, thereby driving the left cutting head and the right cutting head to rotate; wherein, a plurality of first left cutting teeth and a plurality of first right cutting teeth are distributed on the chain-type cutting chain; a plurality of second left cutting teeth are distributed on the left cutting head; a plurality of second right cutting teeth are distributed on the right cutting head; the total width of the left cutting head and the right cutting head is M, the total width of the motor is N, and M<N.

[0006] The main technical effects achieved by the disclosed embodiments are as follows: by designing the total width M of the left cutting head and the right cutting head to be smaller than the total width N of the motor (M<N), the overall size of the cutting mechanism can be significantly reduced. This compact design enables the cutting head to have higher adaptability in narrow tunnels or complex geological conditions, reduces the cutting dead angles caused by space limitations, and improves the excavation efficiency. The compact cutting head design helps to optimize the center of gravity distribution of the cutting mechanism, making it more stable during the excavation process, reducing vibration and swing, thereby improving the cutting accuracy and tunnel forming quality. The smaller cutting head size means less resistance to overcome during the cutting process, thereby reducing the energy consumption of the motor and improving the energy efficiency ratio of the equipment.

[0007] Optionally, the relationship between the total width M of the left cutting head and the right cutting head and the total width N of the motor is: M≤0.9N.

[0008] The main technical effects achieved by the embodiments of the present disclosure are: a reasonable ratio of M to N (M≤0.9N) can optimize the power transmission path between the motor and the cutting head, reduce power loss, and improve cutting efficiency. At the same time, this proportional relationship can ensure that the output power of the motor matches the cutting demand of the cutting head, avoiding equipment damage caused by insufficient or excessive power. Under complex working conditions, such as "three soft" lanes, a reasonable width ratio can effectively reduce the friction between the cutting head and the lane wall, reduce the wear rate of the cutting head, and improve the service life and reliability of the equipment.

[0009] Optionally, the relationship between the total width M of the left cutting head and the right cutting head and the total width N of the motor is: M≥0.8N.

[0010] The main technical effects achieved by the embodiments of the present disclosure are: limiting M≥0.8N to ensure that the cutting head has sufficient width, thereby ensuring the cutting area and cutting capacity of the cutting head. This design can effectively avoid the reduction in cutting efficiency due to the cutting head being too narrow, and ensure that the equipment can maintain a high cutting efficiency under different geological conditions. A reasonable width ratio (M≥0.8N) helps to optimize the force distribution of the cutting teeth, avoids the concentrated force and rapid wear of the cutting teeth due to the cutting head being too narrow, extends the service life of the cutting teeth, and reduces the frequency of replacement of the cutting teeth. The design of M≥0.8N will not excessively increase the size and weight of the equipment while ensuring the cutting capacity, thereby achieving a balance between the cutting capacity and the compactness of the equipment. This balanced design helps to improve the overall performance of the equipment, so that it can maintain a good working condition under different working conditions.

[0011] Optionally, the plurality of first left picks include a plurality of first left pick groups distributed in parallel, and during the rotation of the cutter chain and the left cutting head, the plurality of first left pick groups sequentially cooperate with the plurality of second left picks to form the left spiral shape;

[0012] The plurality of first right picks include a plurality of first right pick groups distributed in parallel, and during the rotation of the cutter chain and the right cutting head, the plurality of first right pick groups sequentially cooperate with the plurality of second right picks to form the right spiral line shape;

[0013] Wherein, the plurality of first left pick groups cooperate with the plurality of first right pick groups to form a plurality of V-shaped structures.

[0014] The main technical effect achieved by the disclosed embodiment is: through the cooperation of the first left pick group and the first right pick group distributed in parallel with the second left pick and the second right pick, a left spiral line and a right spiral line are formed. This design can make the contact between the pick and the coal rock more continuous and uniform during the rotation of the cutting head, thereby improving the continuity and efficiency of cutting. The design of the V-shaped structure enhances the cutting force of the pick and improves the cutting effect.

[0015] Optionally, the first left pick group and the first right pick group in the same V-shaped structure share a pick located closest to the motor in the V-shaped structure.

[0016] The main technical effects achieved by the embodiment of the present disclosure are as follows: the first left pick group and the first right pick group in the same V-shaped structure share the pick closest to the motor in the V-shaped structure. This design reduces the number of picks used, reduces material costs, simplifies the structure, and facilitates maintenance and replacement. The design of sharing the pick also helps to reduce the gap between the picks, improving the compactness and efficiency of cutting.

[0017] Optionally, a straight line formed by connecting two cutting teeth at the open end of the V-shaped structure and a cutting tooth at the closed end of an adjacent V-shaped structure is parallel to the rotation axis of the left cutting head or the right cutting head.

[0018] The main technical effects achieved by the embodiments of the present disclosure are as follows: the straight line formed by the two cutting teeth at the open end of the V-shaped structure and the cutting teeth at the closed end of the adjacent V-shaped structure is parallel to the rotation axis of the left cutting head or the right cutting head. This design can ensure that the force of the cutting teeth during the cutting process is transmitted along the rotation direction of the cutting head, reduce the additional wear of the cutting teeth caused by angle deviation, and improve the service life and cutting efficiency of the cutting teeth.

[0019] Optionally, the plurality of second left picks include a second left pick group I and a second left pick group II, and the second left pick group I and the second left pick group II are respectively spiral lines parallel to each other, wherein during the rotation of the cutter chain and the left cutting head, the second left pick group I and the plurality of first left pick groups on the cutter chain cooperate in sequence to form the left spiral line.

[0020] The main technical effects achieved by the disclosed embodiment are as follows: the second left pick group I and the second left pick group II are respectively spiral lines parallel to each other. This design enables the cutting head to cut coal and rock more evenly during rotation, thereby improving the cutting efficiency and cutting quality.

[0021] Optionally, the picks in the second left pick group II are detachably connected to the left cutting head.

[0022] The main technical effects achieved by the disclosed embodiment are as follows: the cutting head with picks installed on the two spiral lines on the left cutting head is suitable for cutting rock tunnels, and adopts the method of one line (cutting line) and two teeth (cutting teeth), that is, every time the cutting head rotates 360°, there will be two picks on the same cutting line to cut once. When the picks in the second left pick group II are disassembled, the left cutting head is suitable for cutting coal tunnels. At the same time, the second right pick group I and the first right pick groups on the cutting chain cooperate in sequence to form the right spiral line shape, ensuring the smooth transition between the left cutting head and the cutting chain when performing cutting operations in coal tunnels.

[0023] Optionally, the plurality of second right picks include a second right pick group I and a second right pick group II, and the second right pick group I and the second right pick group II are respectively spiral lines parallel to each other, wherein during the rotation of the cutting chain and the right cutting head, the second right pick group I and the plurality of first right pick groups on the cutting chain cooperate in sequence to form the right spiral line.

[0024] The main technical effects achieved by the disclosed embodiment are as follows: the second right pick group I and the second right pick group II are respectively spiral lines parallel to each other. This design enables the cutting head to cut coal and rock more evenly during rotation, thereby improving the cutting efficiency and cutting quality.

[0025] Optionally, the picks in the second right pick group II are detachably connected to the right cutting head.

[0026] The main technical effects achieved by the disclosed embodiment are as follows: the cutting head with picks installed on the two spiral lines on the right cutting head is suitable for cutting rock tunnels, and adopts the method of one line (cutting line) and two teeth (cutting teeth), that is, every time the cutting head rotates 360°, there will be two picks on the same cutting line for cutting once. When the picks in the second right pick group II are disassembled, the right cutting head is suitable for cutting coal tunnels. At the same time, the second right pick group I and the first right pick groups on the cutting chain cooperate in sequence to form the right spiral line shape, ensuring the smooth transition between the right cutting head and the cutting chain when cutting in the coal tunnel.

[0027] A second aspect of the disclosed embodiments provides a roadheader, comprising a shortened chain-cutting horizontal-axis cutting head as described above.

[0028] 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 rock tunnels, thereby improving the roadheading efficiency and cutting effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 Schematic diagram of the structure of a shortened chain-cutting horizontal axis cutting head in the embodiment of the present disclosure (;

[0030] Figure 2 It is a structural schematic diagram of a left-cutting head in an embodiment of the present disclosure;

[0031] Figure 3 It is a cross-sectional schematic diagram of a left cutting head in an embodiment of the present disclosure;

[0032] Figure 4 It is a schematic diagram of the installation of a chain plate in an embodiment of the present disclosure;

[0033] Figure 5 It is a side view of a cutting mechanism in which a shortened chain-cutting horizontal-axis cutting head is located.

[0034] Explanation of the reference numerals: 1. left cutting head; 2. cutting chain; 3. right cutting head; 4. motor; 5. cutting reducer; 6. frame; 7. long hexagon socket bolt; 8. internal spline sleeve; 9. outer head body; 11. second left cutting tooth; 21. first left cutting tooth; 22. first right cutting tooth; 31. second right cutting tooth; 13. chain plate; 14. pin; 15. hexagon socket bolt. DETAILED DESCRIPTION

[0035] 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.

[0036] 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 of "a", "an", "the" 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 associated listed items.

[0037] like Figure 1-5 As shown, the embodiment of the present disclosure provides a shortened chain-cutting horizontal-axis cutting head, which is composed of a left cutting head 1, a cutting chain 2, and a right cutting head 3.

[0038] Taking the left cutting head 1 as an example, it is composed of an inner spline sleeve 8, an outer head body 9, a tooth seat, and a second left cutting tooth 11;

[0039] The cut chain 2 is composed of a chain plate 13 , a pin 14 , a hexagon socket bolt 15 , a tooth seat, a first left pick 21 , and a first right pick 22 .

[0040] The left cutting head 1 and the right cutting head 3 of the present patent 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 by the motors 4 and the cutting reducer 5 installed on the left and right sides of the rear end of the frame 6.

[0041] The teeth of the left cutting head 1 are arranged in accordance with the design concept of two teeth per line and small intercept (cutting distance), and are welded and arranged on the surface of the outer head body 9 of the cutting head in the form of two spiral lines. 25 tooth seats and 25 second left cutting teeth 11 are distributed on each spiral line, and one tooth seat is welded on the top of the spline sleeve 8 in the cutting head and one second left cutting tooth 11 is installed. In other embodiments, the chain cutting structure can also integrally cast each chain cutting plate and tooth seat.

[0042] The teeth of the right cutting head 3 are arranged according to the design concept of two teeth per line and small intercept (cutting distance). Two spiral lines are arranged and welded on the surface of the outer head body 9 of the cutting head. There are 25 tooth seats and 25 second right cutting teeth 31 distributed on each spiral line. A tooth seat is welded on the top of the spline sleeve 8 inside the cutting head and a second right cutting tooth 31 is installed.

[0043] The structures and cutting teeth of the left cutting head 1, the right cutting head 3 and the cutting chain 2 are arranged in a bilaterally symmetrical manner with the center line of the frame 6 as the axis.

[0044] The plurality of first left picks 21 and the plurality of second left picks 11 cooperate to form a left spiral line, and the plurality of first right picks 22 and the plurality of second right picks 31 cooperate to form a right spiral line.

[0045] The cutting mechanism disclosed in the present invention first solves the difficult problem that the existing full-rock tunnel boring 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, the spiral linear arrangement of the cutting teeth can make the cutting force distribution more uniform, so that the connection between the left cutting head 1 and the right cutting head 3 and the cutting chain 2 is smoother during the cutting operation, avoiding the left cutting head 1 and the right cutting head 3 and the cutting chain 2 having different cutting frequencies and cutting directions during the cutting operation, resulting in uneven force on the entire cutting structure, affecting the life of the entire cutting mechanism.

[0046] Continue to refer Figure 1 , the total width of the left cutting head 1 and the right cutting head 3 is M, the total width of the motor 4 is N, M<N. By designing the total width M of the left cutting head 1 and the right cutting head 3 to be smaller than the total width N of the motor 4 (M<N), the overall size of the cutting mechanism can be significantly reduced. This compact design enables the cutting head to have higher adaptability in narrow tunnels or complex geological conditions, reduces the cutting dead angle caused by space limitations, and improves the excavation efficiency. The compact cutting head design helps to optimize the center of gravity distribution of the cutting mechanism, making it more stable during the excavation process, reducing vibration and swing, thereby improving the cutting accuracy and tunnel forming quality. The smaller cutting head size means less resistance to be overcome during the cutting process, thereby reducing the energy consumption of the motor 4 and improving the energy efficiency ratio of the equipment.

[0047] As an optional embodiment, the relationship between the total width M of the left cutting head 1 and the right cutting head 3 and the total width N of the motor 4 is: M≤0.9N. A reasonable ratio of M to N (M≤0.9N) can optimize the power transmission path between the motor 4 and the cutting head, reduce power loss, and improve cutting efficiency. At the same time, this proportional relationship can ensure that the output power of the motor 4 matches the cutting demand of the cutting head, avoiding equipment damage caused by insufficient or excessive power. Under complex working conditions, such as "three soft" tunnels, a reasonable width ratio can effectively reduce the friction between the cutting head and the tunnel wall, reduce the wear rate of the cutting head, and improve the service life and reliability of the equipment.

[0048] As an optional embodiment, the relationship between the total width M of the left cutting head 1 and the right cutting head 3 and the total width N of the motor 4 is: M≥0.8N. The limitation of M≥0.8N ensures that the cutting head has sufficient width, thereby ensuring the cutting area and cutting capacity of the cutting head. This design can effectively avoid the reduction of cutting efficiency due to the cutting head being too narrow, and ensure that the equipment can maintain a high cutting efficiency under different geological conditions. A reasonable width ratio (M≥0.8N) helps to optimize the force distribution of the cutting teeth, avoid the concentrated force and rapid wear of the cutting teeth due to the cutting head being too narrow, extend the service life of the cutting teeth, and reduce the frequency of replacement of the cutting teeth. The design of M≥0.8N will not excessively increase the size and weight of the equipment while ensuring the cutting capacity, thereby achieving a balance between the cutting capacity and the compactness of the equipment. This balanced design helps to improve the overall performance of the equipment, so that it can maintain a good working condition under different working conditions.

[0049] As an optional embodiment, the first left picks 21 include a plurality of first left pick groups distributed in parallel. During the rotation of the cutting chain 2 and the left cutting head 1, the first left pick groups cooperate with the second left picks 11 in sequence to form a left spiral line; the first right picks 22 include a plurality of first right pick groups distributed in parallel. During the rotation of the cutting chain 2 and the right cutting head 3, the first right pick groups 22 cooperate with the second right picks 31 in sequence to form a right spiral line; wherein, the first left pick groups cooperate with the first right pick groups 22 to form a plurality of V-shaped structures. The left spiral line and the right spiral line are formed by the cooperation of the first left pick groups and the first right pick groups 22 distributed in parallel with the second left picks 11 and the second right picks 31. This design can make the contact between the picks and the coal and rock more continuous and uniform during the rotation of the cutting head, thereby improving the continuity and efficiency of cutting. The design of the V-shaped structure enhances the cutting force of the picks and improves the cutting effect.

[0050] As an optional embodiment, the first left pick group and the first right pick group 22 in the same V-shaped structure share the pick that is closest to the motor 4 in the V-shaped structure. The first left pick group and the first right pick group 22 in the same V-shaped structure share the pick that is closest to the motor 4 in the V-shaped structure. This design reduces the number of picks used, reduces material costs, simplifies the structure, and facilitates maintenance and replacement. The design of shared picks also helps to reduce the gap between picks and improve the compactness and efficiency of cutting.

[0051] As an optional embodiment, the straight line formed by the two picks at the open end of the V-shaped structure and the picks at the closed end of the adjacent V-shaped structure is parallel to the rotation axis of the left cutting head 1 or the right cutting head 3. The straight line formed by the two picks at the open end of the V-shaped structure and the picks at the closed end of the adjacent V-shaped structure is parallel to the rotation axis of the left cutting head 1 or the right cutting head 3. This design can ensure that the force of the picks during the cutting process is transmitted along the rotation direction of the cutting head, reduce the additional wear of the picks caused by angle deviation, and improve the service life and cutting efficiency of the picks.

[0052] As an optional embodiment, the plurality of second left picks 11 include a second left pick group I and a second left pick group II, and the second left pick group I and the second left pick group II are respectively spiral lines parallel to each other, wherein, during the rotation of the cutting chain 2 and the left cutting head 1, the second left pick group I and the plurality of first left pick groups on the cutting chain 2 are sequentially matched to form a left spiral line. The second left pick group I and the second left pick group II are respectively spiral lines parallel to each other, and this design enables the cutting head to cut coal and rock more evenly during the rotation process, thereby improving the cutting efficiency and cutting quality.

[0053] As an optional embodiment, the picks in the second left pick group II are detachably connected to the left cutting head 1. The cutting head with picks installed on the two spiral lines on the left cutting head 1 is suitable for cutting rock tunnels, and adopts the method of one line (cutting line) and two teeth (cutting teeth), that is, every time the cutting head rotates 360°, there will be two picks on the same cutting line for cutting once. When the picks in the second left pick group II are disassembled, the left cutting head 1 is suitable for cutting coal tunnels. At the same time, the second right pick group I and the first right pick groups 22 on the cutting chain 2 cooperate in sequence to form a right spiral line, which ensures the smooth transition between the left cutting head 1 and the cutting chain 2 when performing cutting operations in coal tunnels.

[0054] As an optional embodiment, the plurality of second right picks 31 include a second right pick group I and a second right pick group II, and the second right pick group I and the second right pick group II are respectively spiral lines parallel to each other, wherein, during the rotation of the cutting chain 2 and the right cutting head 3, the second right pick group I and the plurality of first right pick groups 22 on the cutting chain 2 are sequentially matched to form a right spiral line. The second right pick group I and the second right pick group II are respectively spiral lines parallel to each other, and this design enables the cutting head to cut coal and rock more evenly during the rotation process, thereby improving the cutting efficiency and cutting quality.

[0055] As an optional embodiment, the picks in the second right pick group II are detachably connected to the right cutting head 3. The cutting head with picks installed on the two spiral lines on the right cutting head 3 is suitable for cutting rock tunnels, and adopts the method of one line (cutting line) and two teeth (cutting teeth), that is, every time the cutting head rotates 360°, there will be two picks on the same cutting line for cutting once. When the picks in the second right pick group II are disassembled, the right cutting head 3 is suitable for cutting coal tunnels. At the same time, the second right pick group I and the first right pick groups 22 on the cutting chain 2 cooperate in sequence to form a right spiral line, which ensures the smooth transition between the right cutting head 3 and the cutting chain 2 when cutting in the coal tunnel.

[0056] like Figure 3 As shown, the cutting head body is welded at the bottom and top grooves of the inner spline sleeve 8 and the outer head body 9. Among them, the two reinforcing ribs in the outer head body 9 and the outer circle of the inner spline sleeve 88 are mechanically matched to enhance the anti-seismic performance of the cutting head and realize the lightweight design of the large-diameter cutting head body.

[0057] The arrangement of the first left picks 21 and the second right picks 31 on the cutting chain 2 adopts a V-shaped, small-intercept design, which not only forms a spiral connection with the row of teeth of the cutting head, but also maximizes the cutting efficiency. Figure 4 As shown, the chain plate 13 and the pin shaft 14 are fixed by means of hexagon socket bolts 15, and are easy to disassemble and replace.

[0058] The motor 4 and the cutting reducer 5 installed on the left and right sides of the rear end of the frame 6 drive the left cutting head 1, the cutting chain 2, and the right cutting head 3 to rotate 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.

[0059] The second aspect of the disclosed embodiment provides a roadheader, which includes a coal roadway and rock roadway dual-purpose chain-cutting 2-type horizontal axis cutting mechanism 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 roadways and rock roadways, and improves the driving efficiency and cutting effect.

[0060] 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 shortened chain-cutting horizontal axis cutting head, characterized in that: The cutting mechanism includes a frame and a motor, a cutting chain, a left cutting head and a right cutting head installed on the 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, thereby driving the left cutting head and the right cutting head to rotate; wherein, a plurality of first left cutting teeth and a plurality of first right cutting teeth are distributed on the cutting chain; a plurality of second left cutting teeth are distributed on the left cutting head; a plurality of second right cutting teeth are distributed on the right cutting head; the total width of the left cutting head and the right cutting head is M, the total width of the motor is N, and M<N.

2. A shortened chain-cutting horizontal axis cutting head according to claim 1, characterized in that: The relationship between the total width M of the left cutting head and the right cutting head and the total width N of the motor is: M≤0.9N.

3. A shortened chain-cutting horizontal axis cutting head according to claim 1, characterized in that: The relationship between the total width M of the left cutting head and the right cutting head and the total width N of the motor is: M≥0.8N.

4. A shortened chain-cutting horizontal axis cutting head according to claim 1, characterized in that: The plurality of first left picks include a plurality of first left pick groups distributed in parallel, and during the rotation of the cutter chain and the left cutting head, the plurality of first left pick groups sequentially cooperate with the plurality of second left picks to form the left spiral line shape; The plurality of first right picks include a plurality of first right pick groups distributed in parallel, and during the rotation of the cutter chain and the right cutting head, the plurality of first right pick groups sequentially cooperate with the plurality of second right picks to form the right spiral line shape; Wherein, the plurality of first left pick groups cooperate with the plurality of first right pick groups to form a plurality of V-shaped structures.

5. A shortened chain-cutting horizontal axis cutting head according to claim 4, characterized in that: The first left pick group and the first right pick group in the same V-shaped structure share the pick located closest to the motor in the V-shaped structure.

6. A shortened chain-cutting horizontal axis cutting head according to claim 4, characterized in that: The plurality of second left picks include a second left pick group I and a second left pick group II, wherein the second left pick group I and the second left pick group II are respectively spiral lines parallel to each other, wherein during the rotation of the cutter chain and the left cutting head, the second left pick group I and the plurality of first left pick groups on the cutter chain cooperate in sequence to form the left spiral line.

7. A shortened chain-cutting horizontal axis cutting head according to claim 6, characterized in that: The picks in the second left pick group II are detachably connected to the left cutting head.

8. A shortened chain-cutting horizontal axis cutting head according to claim 4, characterized in that: The plurality of second right picks include a second right pick group I and a second right pick group II, wherein the second right pick group I and the second right pick group II are respectively spiral lines parallel to each other, wherein during the rotation of the cutter chain and the right cutting head, the second right pick group I and the plurality of first right pick groups on the cutter chain cooperate in sequence to form the right spiral line.

9. A shortened chain-cutting horizontal axis cutting head according to claim 8, characterized in that: The picks in the second right pick group II are detachably connected to the right cutting head.

10. A tunnel boring machine, characterized in that: The tunnel boring machine comprises a shortened chain-cutting horizontal-axis cutting head as claimed in any one of claims 1 to 9.

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