Breaking, cutting and loading unit for coal mine

Abstract

The breaking and cutting loading unit comprises a walking crawler belt, an operation platform and an electric oil tank equipment set, and a discharging mechanism, an excavating mechanism, a crushing mechanism and a breaking and cutting mechanism are arranged on a chassis of the walking crawler belt; the discharging mechanism is arranged in the middle of the walking crawler chassis and comprises a discharging groove and a stirring and discharging assembly arranged in the discharging groove. The excavating mechanism comprises an assembling seat assembly, an excavating arm and an excavating bucket; the crushing mechanism is arranged at the top of the section of excavating arm at the foremost end adjacent to the excavating bucket, and comprises a fixed seat, a crushing hammer and a crushing oil cylinder; the breaking and cutting mechanism is arranged on the top of the fixing base and comprises a sliding base, a breaking and cutting tooth assembly and a driving motor, and a breaking and cutting oil cylinder is arranged on one side of the sliding base. The device integrates the functions of tunneling, crushing, excavating, cutting, cleaning and transporting, solves the problems of complexity and low efficiency caused by the fact that various different devices need to be intermittently and alternately replaced to enter a field for operation in existing rock stratum construction, and greatly improves the production efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of coal mine equipment, in particular to a coal mine breaking and cutting device unit. Background Art

[0002] Tunneling construction in underground coal mines has always been a top priority for coal mining operations. Years ago, the biggest challenge facing tunneling in underground coal mines was the hard rock formations, requiring significant equipment investment, yet rock crushing efficiency remained low. In most cases, blasting equipment was still required to complete tunneling operations in these hard rock formations, posing a significant safety hazard. Conventional tunneling equipment has a limited structure and functionality, capable only of drilling into the rock formations. This prevents the timely removal of the large amount of broken rock generated during drilling, necessitating the intermittent deployment of cleaning machinery, severely limiting tunneling efficiency. Furthermore, for large, hard rock formations, the volume of rock fragments dropped during drilling is still very large, making conventional cleaning machinery incapable of transporting and clearing them. Consequently, specialized rock crushing machinery is required to break the large rock fragments into easily removable small particles before alternate cleaning operations can be performed, severely limiting production efficiency. Summary of the Invention

[0003] In order to solve the above problems, the purpose of the present invention is to propose a coal mine crushing and cutting device, which integrates the functions of tunneling, crushing, excavation, cutting, cleaning and transportation in one, and can cope with the full range of holographic operations of underground tunnel rock excavation. It solves the tedious and inefficient problems of intermittent replacement of various types of equipment for on-site operations in existing rock construction, and greatly improves production efficiency.

[0004] The technical solutions adopted by the present invention to solve the above problems are as follows:

[0005] The present invention discloses a coal mine breaking and cutting loader group, comprising a walking crawler, an operating platform arranged on the walking crawler and an electrical oil tank equipment group, wherein a discharging mechanism, an excavating mechanism, a crushing mechanism and a breaking and cutting mechanism are arranged on the walking crawler chassis; wherein the discharging mechanism is arranged at the middle part of the walking crawler chassis, comprising a discharging trough and a discharging assembly arranged in the discharging trough; the excavating mechanism comprises an assembly seat assembly, an excavating arm and a bucket, and the assembly seat assembly is fixedly arranged on the side wall of the front end of the discharging trough; the crushing mechanism adjacent to the bucket is arranged at the top of a frontmost section of the excavating arm, comprising a fixed seat, a breaker hammer and a crushing cylinder; the breaking and cutting mechanism is arranged on the top of the fixed seat, comprising a slide, a breaking and cutting tooth assembly arranged on the slide and a driving motor located on the top of the slide for driving the breaking and cutting tooth assembly to rotate, and a breaking and cutting cylinder for driving it to slide back and forth is arranged on one side of the slide.

[0006] Based on the above technical solution of a coal mine cutting and assembling unit, in the discharge mechanism, a hollow cavity for assembling a discharge assembly is provided at the center of the bottom of the discharge chute, and the discharge assembly is arranged in the hollow cavity.

[0007] Based on the above-mentioned technical solution of a coal mine cutting and loading unit, the discharge assembly includes a discharge platform, a transmission tooth chain laid around the circumference of the discharge platform surface, and a drive motor arranged on one side of the tail end of the discharge trough. The transmission shaft of the drive motor is connected to a drive tooth engaged with the transmission tooth chain. Discharge plates are evenly distributed on the transmission tooth chain, and the space between any two adjacent discharge plates forms a discharge bin.

[0008] Based on the above-mentioned technical solution of a coal mine cutting and assembling unit, in the excavation mechanism, the assembly seat assembly includes an assembly seat, a horizontal turntable arranged on the top of the assembly seat, a horizontal turntable mounted on the top of the horizontal turntable and a rotary gear plate arranged on the front end side of the horizontal turntable, the rotary gear plate is fixedly connected to the tail end of the excavation arm, wherein the top of the assembly seat is located at the rear side of the horizontal turntable and is provided with a swing cylinder for pushing the horizontal turntable to swing back and forth horizontally on the horizontal turntable, the top of the horizontal turntable is provided with a rotary motor, and the transmission shaft of the rotary motor is connected with a driving tooth engaged with the rotary gear plate to drive the rotary gear plate to drive the excavation arm to rotate 360 degrees in all directions.

[0009] Furthermore, the digging arm includes a boom, an arm and an arm cylinder. The rear end of the boom is connected to the assembly seat assembly, and the front end of the arm is connected to the bucket, and they are driven by the arm cylinder together.

[0010] Based on the above-mentioned technical solution of a coal mine breaking and cutting device, in the crushing mechanism, the fixed seat is fixedly arranged on the top of the excavating arm, the breaker hammer is slidably arranged in the inner cavity of the fixed seat, and the crushing cylinder is arranged on both sides of the fixed seat and connected to the breaker hammer to drive the breaker hammer to reciprocate in the fixed seat.

[0011] More specifically, the fixed seat is a seat body with a gantry structure, and the two side walls of the inner cavity of the fixed seat are provided with slots. The top of the breaker hammer is integrally connected with a slider, and the slider is slidably embedded in the slot, and connecting ears are respectively provided on both sides of the slider. The breaking cylinder is arranged on both sides of the fixed seat and is respectively hinged to the protruding connecting ears.

[0012] Based on the above-mentioned technical solution of a coal mine cutting device, in the cutting mechanism, a clamping plate is provided at the bottom of the slide, and a clamping groove is provided on the inner walls of the two side plates on the top of the fixed seat. The slide is slidably embedded in the clamping groove through the clamping plate to form a sliding structure. There is a frame on the top of the slide, and the cutting tooth assembly is arranged in the frame. The driving motor is arranged on the top of the frame and is transmission-connected to the cutting tooth assembly to drive the cutting tooth assembly to rotate.

[0013] Based on the technical solution of the above-mentioned cutting mechanism, the cutting tooth assembly includes a cutting body with a crawler chassis structure and a cutting tooth group evenly distributed on the steel belt on the surface of the cutting body. The main transmission shaft on one side of the cutting body is connected to the drive motor.

[0014] Furthermore, the top cover of the excavation mechanism is provided with a protective baffle, and both sides of the protective baffle are respectively supported by lifting cylinder groups, and the bottom of the lifting cylinder group is connected to the front end side of the discharge chute.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] The coal mine crushing, cutting, and loading unit described in this invention is a high-efficiency, continuously operational crushing and loading device. Its primary functions include rock sawing, drilling, secondary crushing, and loading and transporting. The unit's compact and flexible operating mechanism allows for operation in damp, flooded tunnels. It can load rock across the entire section, leaving no dead angles and requiring no manual bottom cleaning or loading assistance. Its smooth, impact-free operation and advanced design ensure reliable operation, simple operation, and easy maintenance. Both experienced excavator operators and skilled excavator repair technicians can operate and maintain the unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the present invention;

[0018] Figure 2 It is a front view structural schematic diagram of the present invention;

[0019] Figure 3 It is a structural diagram of the core working mechanism of the present invention;

[0020] Figure 4 It is a structural diagram of the assembly seat assembly and the material shifting and discharge component;

[0021] Figure 5 It is a schematic diagram of the assembly structure of the crushing mechanism and the cutting mechanism;

[0022] Figure 6 It is a schematic diagram of the front view of the crushing mechanism and the cutting mechanism;

[0023] Figure 7 It is a structural schematic diagram of the cutting tooth assembly.

[0024] Description of the drawings: 1. Discharge chute, 101. Hollow cavity, 2. Digging arm, 3. Bucket, 4. Fixed seat, 401. Slot, 402. Card slot, 5. Breaking hammer, 501. Slider, 502. Connecting ear, 6. Crushing cylinder, 7. Sliding seat, 701. Card plate, 702. Frame, 8. Drive motor, 9. Cutting cylinder, 10. Discharge platform, 11. Transmission tooth chain, 12. Drive motor, 13. Digging Plate, 14. Assembly seat, 15. Horizontal turntable, 16. Horizontal turntable, 17. Rotary gear plate, 18. Swing cylinder, 19. Rotary motor, 20. Driving gear, 21. Cutting body, 22. Protective baffle, 23. Lifting cylinder group, 24. Walking track, 25. Operating platform, 26. Electrical oil tank equipment group, 27. Cutting tooth group, 28. Lifting cylinder, 29. Slag pushing and supporting shovel, 30. Supporting cylinder. DETAILED DESCRIPTION

[0025] The technical solutions of the present invention will be described clearly and completely below with reference to the accompanying drawings. The embodiments described below are only part of the embodiments of the present invention, but not all of them.

[0026] Example 1

[0027] This embodiment is a basic implementation method of the present invention. This embodiment discloses a coal mine crushing and cutting loader unit, including a walking crawler 24, an operating platform 25 arranged on the walking crawler 24, and an electrical oil tank equipment group 26. The walking crawler 24 is a crawler chassis structure commonly used in coal mines. Its structure is not described in detail. The operating platform 25 is mainly a driver's cab, which integrates all the operating actions of the present invention and is used for the driver to operate flexibly and centrally. The electrical oil tank equipment group 26 includes a hydraulic pump station composed of an electric motor and an oil pump, as well as an electrical system control assembly, which is used for the power output and control of the entire unit. The walking crawler 24 chassis is provided with a discharge mechanism, an excavation mechanism, a crushing mechanism, and a crushing mechanism; wherein,

[0028] First, the structure of the discharge mechanism is described as follows:

[0029] The discharging mechanism is arranged in the middle of the chassis of the walking crawler 24, including a discharging trough 1 and a discharging assembly arranged in the discharging trough 1; a hollow cavity 101 for assembling the discharging assembly is opened at the center of the bottom of the discharging trough 1, and the discharging trough 1 runs through the entire unit. One end of the discharging trough is tilted downward, and the end has a notch similar to a bucket structure. The bottom is close to the ground for shoveling materials, and the other end passes through the unit body and tilts upward. A drop area is formed at the tail end, and a special rock particle collection box or transport vehicle can be placed at the bottom to transport the collected and discharged slag in time.

[0030] In the discharge mechanism, a core discharge structure is involved, namely the above-mentioned discharge assembly. The discharge assembly is arranged in the hollow cavity 101, see Figure 4 , specifically including a discharge platform 10, a conveying tooth chain 11 laid around the circumference of the discharge platform 10, and a driving motor 12 arranged on one side of the tail end of the discharge trough 1, the transmission shaft of the driving motor 12 is connected to a driving tooth engaged with the conveying tooth chain 11, and the conveying tooth chain 11 is evenly distributed with stripping plates 13, and the space between any two adjacent stripping plates 13 forms a discharge bin.

[0031] In the working state, as the whole machine unit moves forward, the bucket notch at the bottom front end of the discharge chute 1 will push the rock particles into the discharge assembly, and the drive motor 12 drives the transmission tooth chain 11 to operate, and the rock particles are transported to the tail end of the discharge chute 1 to complete the cleaning of rock particles and other slag.

[0032] Additionally, see Figure 4 On the basis of the assembly structure of the drive motor 12, a tensioning and relaxing structure of the transmission tooth chain 11 is also provided, that is, at the position of the drive motor 12 on the discharge chute 1, an additional sliding adjustment groove is provided for the lateral displacement of the drive motor 12. The drive motor 12 is slidably assembled in the sliding adjustment groove through a connecting piece, and an adjusting screw for adjusting the tightness of the transmission tooth chain 11 is further provided outside the discharge chute 1. After being connected to the drive motor 12, the assembly position of the drive motor 12 is adjusted by rotating the adjusting screw, thereby adjusting the tensioning degree of the transmission tooth chain 11.

[0033] In addition, the assembly structure of the discharge chute 1 is described as follows:

[0034] See also Figure 4 There are two sets of hinge ears at the front and rear of the bottom of the discharge chute for assembly. The pair of hinge ears at the front end is installed on the crawler chassis. Figure 5 The crawler chassis, i.e., the walking crawler 24, is provided with an assembly shaft at the corresponding position for receiving and installing the hinge ear to form an articulated connection structure; the two hinge ears at the rear end side are connected to a set of lifting cylinders 28 at the bottom, and the telescopic rods of the lifting cylinders 28 are hingedly connected to the hinge ears at the rear end through the connecting shaft, so that the rear end of the discharge chute can be "lifted" by the lifting cylinder to adjust the height of the drop-out port at the tail end of the discharge chute 1 for connecting the subsequent material connection.

[0035] Secondly, the structure of the excavation mechanism is described as follows:

[0036] The excavation mechanism as a whole is realized with reference to the existing excavation equipment, which includes an assembly seat assembly, an excavation arm 2 and a bucket 3. The assembly seat assembly is fixedly arranged on the side wall of the front end of the discharge trough 1, and the excavation arm 2 includes a large arm, a small arm and an excavation arm cylinder. The tail end of the large arm is connected to the assembly seat assembly, and the front end of the small arm is connected to the bucket 3, and they are jointly driven by the excavation arm cylinder. The structure and function of the excavation arm 2 and the bucket 3 are consistent with those of the existing excavation equipment, so they are not repeated in this embodiment.

[0037] What needs to be explained in detail is the structure of the assembly seat, which integrates the left and right swing and 360-degree rotation functions of the entire excavating mechanism. Figure 4 The assembly seat assembly includes an assembly seat 14, a horizontal turntable 15 arranged on the top of the assembly seat 14, a horizontal turntable 15 assembled on the top of the horizontal turntable 15 and a rotary gear plate 17 arranged on the front end side of the horizontal turntable 16, the rotary gear plate 17 is fixedly connected to the tail end of the excavating arm 2, wherein the top of the assembly seat 14 is located at the rear side of the horizontal turntable 16 and is provided with a swing cylinder 18 for pushing the horizontal turntable 16 to swing back and forth horizontally on the horizontal turntable 15, and the swing cylinder 18 is provided with two, which are respectively arranged on the left and right sides behind the horizontal turntable 16, for pushing the horizontal turntable 16 to complete the swing adjustment in the left and right directions, and a rotary motor 19 is provided on the top of the horizontal turntable 16, and the drive shaft of the rotary motor 19 is connected to a driving tooth 20 engaged with the rotary gear plate 17, and the rotary motor 19 is also provided with two, which synchronously drive the rotary gear plate 17 to drive the rotary gear plate 17 to drive the excavating arm to rotate 2360 degrees in all directions.

[0038] Again, the structure of the crushing mechanism is described as follows:

[0039] The crushing mechanism is adjacent to the bucket 3 and is arranged on the top of the frontmost digging arm 2. Figure 5 , including a fixed seat 4, a breaker hammer 5 and a breaking cylinder 6; the fixed seat 4 is fixedly set on the top of the excavating arm 2, the breaker hammer 5 is slidably set in the inner cavity of the fixed seat 4, and the breaking cylinder 6 is set on both sides of the fixed seat 4 and connected to the breaker hammer 5 to drive the breaker hammer 5 to reciprocate in the fixed seat 4.

[0040] More specifically, the fixed seat 4 is a seat body with a gantry structure, and there is an inner cavity between the fixed seat 4 and the top of the excavating arm 2. The front ends of the two side walls of the inner cavity of the fixed seat 4 are provided with slots 401. The top of the breaker 5 is integrally connected with a slider 501. The width of the slider 501 is consistent with the width of the fixed seat 4 in the inner cavity, and the size is also adapted to the slot 401. The slider 501 is slidably embedded in the slot 401, and the side walls of the slider 501 are flush with the side walls of the fixed seat 4, and the side walls of the slider 501 are respectively provided with connecting ears 502. The crushing cylinder 6 is arranged at the tail ends of the side walls on both sides of the fixed seat 4 and is respectively hinged to the extended connecting ears 502. The reciprocating telescopic action of the crushing cylinder 6 can directly drive the slider 501 and the breaker 5 to perform synchronous reciprocating telescopic action through the connecting ears 502, that is, the high-frequency vibration crushing action of the breaker.

[0041] Finally, the structure of the cutting mechanism is described as follows:

[0042] See also Figure 5 and Figure 6 The cutting mechanism is arranged on the top of the fixed seat 4, and includes a slide 7, a cutting tooth assembly arranged on the slide 7 and a driving motor 8 located on the top of the slide 7 for driving the cutting tooth assembly to rotate. A cutting cylinder 9 is provided on one side of the slide 7 for pushing it to slide back and forth; in the cutting mechanism, a clamping plate 701 is provided at the bottom of the slide 7, and a clamping groove 402 is provided on the inner walls of the two side plates on the top of the fixed seat 4. The slide 7 is slidably embedded in the clamping groove 402 through the clamping plate 701 to form a sliding structure. There is a frame 702 on the top of the slide 7, and the cutting tooth assembly is arranged in the frame 702. The driving motor 8 is provided on the top of the frame 702 and is transmission-connected to the cutting tooth assembly to drive the cutting tooth assembly to rotate.

[0043] Based on the above structure, the cutting tooth assembly needs to be explained in detail. Figure 5 and Figure 7 As shown, the cutting tooth assembly includes a cutting body 21 with a crawler chassis structure and a cutting tooth group 27 evenly distributed on the steel belt on the surface of the cutting body 21. If the cutting body 21 is simply viewed from its structure, it can actually be similar to a crawler body, and its main structure is basically the same as that of the crawler body. The main transmission shaft on one side of the cutting body 21 is connected to the drive motor 8 to drive the steel belt on the surface of the cutting body 21 to rotate.

[0044] also, Figure 7The combination of the cutting tooth group 27 is marked in the figure. It can be seen that the cutting tooth group 27 is composed of four groups of cutting teeth, namely a single cutting tooth and three groups of double cutting teeth. Among them, the structures of the three groups of double cutting teeth are completely different. Specifically, the orientation or arrangement of the double cutting teeth of the first group is an "outward-expanding" structure, that is, the tooth heads of the two cutting teeth face back to back and face outwards. The orientation or arrangement of the double cutting teeth of the second group is "parallel" to each other, that is, the tooth heads of the two cutting teeth face the same and parallel directions, which are consistent with the main direction of the cutting body 21. The orientation or arrangement of the double cutting teeth of the third group is an "inward-retracting" structure, which is exactly opposite to the orientation of the double cutting teeth of the first group mentioned above, that is, the tooth heads of the two cutting teeth face each other and face inwards. The above four groups of cutting teeth together constitute a complete set of cutting teeth group 27, and multiple sets of cutting teeth groups 27 are evenly distributed on the steel belt on the surface of the cutting body 21, with the cutting tooth group 27 as a unit. The benefit of this structure is that it can crush and cut any rock extremely efficiently, and even the hardest rock can be cut and crushed efficiently.

[0045] The above embodiment represents the basic structure of the complete machine unit of the present invention. In operation, the crushing mechanism enables excavation and crushing within rock formations, while the shearing mechanism cuts and crushes large rock blocks. Finally, the excavation mechanism and discharge structure coordinate to centrally discharge the cut and crushed rock particles and slag. This seamlessly integrates the functions of excavation, crushing, excavation, cutting, and clearing and transportation, enabling highly efficient operations within rock tunnels.

[0046] Example 2

[0047] The technical solution of this embodiment is basically the same as that of embodiment 1, the only difference is that: Figure 1-3 As shown, the top cover of the excavation mechanism is equipped with a protective baffle 22, supported on either side by lift cylinders 23. The bottom of the lift cylinders 23 is connected to the front end of the discharge chute 1. The primary function of the protective baffle 22 is to protect the core working area of the unit, preventing damage from falling rocks or particles in the tunnel during operation. The lift cylinders 23 drive the entire protective baffle 22 to move upward and downward, and in actual operation, the position can be adjusted according to the specific working environment.

[0048] Example 3

[0049] The technical solution of this embodiment is basically the same as that of Example 2, with the only difference being that the protective baffle 22 is upgraded to a retractable composite structure, that is, a sliding baffle is further slidably sleeved on the protective baffle 22 and driven and connected by a telescopic oil cylinder. The extension and retraction of the sliding baffle can increase the overall protective covering area of the protective baffle 22, thereby expanding the protective area of the unit.

[0050] Finally, see Figure 5 A slag pushing and supporting shovel 29 is also provided at the bottom of the rear end of the walking track 24, which is connected to a supporting cylinder 30 provided at the tail end of the chassis of the walking track 24, so as to drive the slag pushing and supporting shovel 29 to rise and fall through the supporting cylinder 30 to complete the slag pushing or supporting operation.

[0051] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A coal mine cutting and assembling unit, comprising a walking crawler (24), an operating platform (25) arranged on the walking crawler (24), and an electrical oil tank equipment unit (26), characterized in that: The walking crawler (24) chassis is provided with a discharge mechanism, an excavation mechanism, a crushing mechanism and a cutting mechanism; wherein, The discharge mechanism is arranged in the middle of the chassis of the walking crawler (24), and comprises a discharge trough (1) and a discharge assembly arranged in the discharge trough (1); The excavation mechanism comprises an assembly seat assembly, an excavation arm (2) and a bucket (3); the assembly seat assembly is fixedly arranged on the side wall at the front end of the discharge chute (1); The crushing mechanism is adjacent to the bucket (3) and is arranged on the top of the frontmost section of the digging arm (2), and includes a fixed seat (4), a crushing hammer (5) and a crushing cylinder (6); The cutting mechanism is arranged on the top of the fixed seat (4), and includes a slide (7), a cutting tooth assembly arranged on the slide (7), and a driving motor (8) located on the top of the slide (7) for driving the cutting tooth assembly to rotate. A cutting oil cylinder (9) is arranged on one side of the slide (7) for driving it to slide back and forth.

2. A coal mine cutting and assembling unit according to claim 1, characterized in that: In the discharge mechanism, a hollow cavity (101) for assembling a discharge assembly is provided at the center of the bottom of the discharge trough (1), and the discharge assembly is arranged in the hollow cavity (101).

3. The coal mine breaking and cutting unit according to claim 1, characterized in that: The material discharging assembly comprises a material discharging platform (10), a transmission tooth chain (11) laid around the circumference of the surface of the material discharging platform (10), and a driving motor (12) arranged on one side of the tail end of the material discharging trough (1). The transmission shaft of the driving motor (12) is connected to a driving tooth engaged with the transmission tooth chain (11). The material discharging plates (13) are evenly distributed on the transmission tooth chain (11), and the space between any two adjacent material discharging plates (13) forms a material discharging bin.

4. A coal mine cutting and assembling unit according to claim 1, characterized in that: In the excavation mechanism, the assembly seat assembly comprises an assembly seat (14), a horizontal turntable (15) arranged on the top of the assembly seat (14), a horizontal turntable (16) assembled on the top of the horizontal turntable (15), and a rotary gear disc (17) arranged on the front end side of the horizontal turntable (16), wherein the rotary gear disc (17) is fixedly connected to the tail end of the excavation arm (2), wherein the top of the assembly seat (14) is located at the rear side of the horizontal turntable (16) and is provided with a swing cylinder (18) for pushing the horizontal turntable (16) to swing back and forth horizontally on the horizontal turntable (15), and the top of the horizontal turntable (16) is provided with a rotary motor (19), and the transmission shaft of the rotary motor (19) is connected with a driving tooth (20) meshing with the rotary gear disc (17) to drive the rotary gear disc (17) to drive the excavation arm (2) to rotate 360 degrees in all directions.

5. The coal mine breaking and cutting unit according to claim 1, characterized in that: The digging arm (2) comprises a large arm, a small arm and a digging arm oil cylinder. The tail end of the large arm is connected to the assembly seat assembly, and the front end of the small arm is connected to the digging bucket (3), and they are driven by the digging arm oil cylinder.

6. The coal mine breaking and cutting unit according to claim 1, characterized in that: In the crushing mechanism, a fixed seat (4) is fixedly arranged on the top of the digging arm (2), the breaker hammer (5) is slidably arranged in the inner cavity of the fixed seat (4), and the crushing cylinder (6) is arranged on both sides of the fixed seat (4) and connected to the breaker hammer (5) to drive the breaker hammer (5) to reciprocate in the fixed seat (4).

7. A coal mine breaking and cutting unit according to claim 6, characterized in that: The fixed seat (4) is a seat body with a gantry structure. The inner wall of the fixed seat (4) is provided with slots (401). The top of the breaker hammer (5) is integrally connected with a slider (501). The slider (501) is slidably embedded in the slot (401). Connecting ears (502) are respectively provided on both sides of the slider (501). The crushing oil cylinder (6) is provided on both sides of the fixed seat (4) and is respectively hinged to the protruding connecting ears (502).

8. The coal mining crushing and assembling unit according to claim 1, characterized in that: In the cutting mechanism, a clamping plate (701) is provided at the bottom of the slide (7), and a clamping groove (402) is provided on the inner walls of the two side plates at the top of the fixed seat (4). The slide (7) is slidably embedded in the clamping groove (402) through the clamping plate (701) to form a sliding structure. A frame (702) is provided at the top of the slide (7), and the cutting tooth assembly is arranged in the frame (702). The driving motor (8) is arranged at the top of the frame (702) and is in transmission connection with the cutting tooth assembly to drive the cutting tooth assembly to rotate.

9. The coal mine breaking and cutting unit according to claim 1, characterized in that: The cutting tooth assembly comprises a cutting body (21) with a crawler chassis structure and a cutting tooth group (27) evenly distributed on a steel belt on the surface of the cutting body (21). The main transmission shaft on one side of the cutting body (21) is connected to a driving motor (8).

10. A coal mine breaking and cutting unit according to claim 9, characterized in that: The top cover of the excavation mechanism is provided with a protective baffle (22), and both sides of the protective baffle (22) are respectively supported by lifting cylinder groups (23), and the bottom of the lifting cylinder group (23) is connected to the front end side of the discharge chute (1).

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