Novel impacting-cutting combined type rock breaking structure of cantilever type heading machine and working method of novel impacting-cutting combined type rock breaking structure

Abstract

The invention discloses a novel impact-cutting composite rock breaking configuration of a cantilever type heading machine and a working method, relates to the technical field of coal mining, and solves the problems of large cutting load and high cutting tooth loss rate in the cutting process of the heading machine. The device comprises a cutting head, an impact breaking hammer, a pushing device, a sliding block mechanism, a rotary shell, a fixed shell, a transmission device, a driving device and the like, two working modes including a cutting mode and an impact mode are included, and the implementation principle is that the pushing device drives the impact breaking hammer and the sliding block mechanism to move, so that a drill rod of the impact breaking hammer stretches out or retracts, and when the drill rod completely retracts, the rotary shell is driven to rotate; the driving device drives the cutting head to rotate to realize rock cutting and breaking; when the drill rod extends out, the impact breaking hammer impacts coal rock at a certain frequency, the pushing device continuously provides pushing force, and impact rock breaking is achieved. According to the invention, the vibration condition of the cutting arm when the heading machine is used for heading hard rocks is improved, the load torque of a cutting mode is reduced, the labor is reduced, the cost is reduced, and the heading efficiency is improved.

Description

Technical Field

[0001] This invention relates to the field of coal mining technology, specifically to a novel impact-cutting composite rock-breaking configuration and working method for a cantilever tunneling machine. Background Technology

[0002] Cantilever roadheaders are key equipment for coal mine roadway excavation and coal mining. Their compact size makes them suitable for most roadways, leading to their widespread use. However, in deep coal mines where most coal and rock have a hardness >10, they face challenges such as enormous cutting loads, low cutting capacity, severe vibration, high cutter wear rates, and a sharp decline in excavation efficiency. In severe cases, this can lead to overloading and damage to the cutting motor, resulting in high maintenance costs. Currently, a common practice to address this issue is to stop the roadheader when it cannot cut, then manually break the coal and rock using rock drills to create cracks and loosen the rock before the roadheader's cutting head separates the coal and rock. However, this practice significantly increases safety hazards and reduces excavation efficiency.

[0003] Chinese patent application number 201910723446.X proposes a drill bit for cantilever tunneling machines. This invention integrates a pneumatic impact drill bit inside the cutting head, which is similar in principle to the ball impactors already on the market. It is mainly used for drilling holes and concave surfaces, making it easy to prevent the cutting surface from slipping. However, it is difficult to break hard rock and still generates a large cutting load.

[0004] Chinese patent application number 202311804203.4 proposes a dual-power-source driven vibration-impact composite rock breaking device. This invention sets up an eccentric vibration excitation device, so that the cutting device generates excitation force when rotating to achieve vibration rock breaking and achieve the purpose of hard rock crushing. However, the sacrifice is severe vibration, and the vibration problem is still an urgent problem to be solved. Summary of the Invention

[0005] To address the aforementioned problems of high cutting load and high tooth wear rate encountered during the cutting process of tunneling machines, this invention proposes a novel impact-cutting composite rock-breaking configuration and operating method for cantilever tunneling machines. This invention improves the vibration of the cutting arm when tunneling in hard rock, reduces the load torque in the cutting mode, reduces labor, lowers costs, and increases tunneling efficiency.

[0006] This invention proposes a novel impact-cutting composite rock-breaking configuration for a cantilever tunneling machine, specifically comprising a cutting head, an impact breaker, a jacking device, a rotating shell, a fixed shell, a transmission device, and a drive device. The cutting head, rotating shell, fixed shell, and cantilever support structure are connected sequentially, with the rotating shell and fixed shell rotatably connected. A transmission device is installed inside the fixed shell, with one end connected to the rotating shell and the other end connected to the drive device. The drive device is mounted on the cantilever support structure. The impact breaker is coaxially mounted inside the cutting head, and its rear end is connected to a jacking device mounted on the cantilever support structure. Driven by the jacking device, the front end of the impact breaker extends out from the central hole of the cutting head.

[0007] Furthermore, the rotating housing is provided with a slider mechanism, which is movably connected to the impact breaker.

[0008] Furthermore, a slewing bearing is fitted onto the impact breaker; the inner ring of the slewing bearing is connected to the impact breaker, and the outer ring is connected to the slider mechanism.

[0009] Furthermore, a slewing bearing three is fitted on the outer side of the slewing housing; the inner ring of the slewing bearing three is connected to the slewing housing, and the outer ring is connected to the fixed housing.

[0010] Furthermore, the transmission device includes several planetary gears, an internal gear ring, several planetary shafts, and a sun gear; the sun gear is connected to the drive device; several planetary shafts are evenly arranged circumferentially inside the fixed housing, and each planetary shaft has a planetary gear at both ends; the planetary gear at one end of the planetary shaft meshes with the sun gear, and the planetary gear at the other end has an internal gear ring on its outer side that meshes with it; the internal gear ring is connected to the rotating housing.

[0011] Furthermore, a second rotary bearing is provided inside the rotary housing. From the inside to the outside, a bushing, a second bearing, and a bearing housing are arranged sequentially on the end of the planetary shaft facing the cutting head. The bearing housing is connected to the inner ring of the second rotary bearing, and the outer ring of the second rotary bearing is connected to the rotary housing.

[0012] Furthermore, the transmission device also includes a planetary shaft fixing plate, through which the planetary shaft passes and a bearing is disposed between the two; the planetary shaft fixing plate and the fixed housing are connected.

[0013] Furthermore, the sun gear is provided with an end shaft, which is rotatably connected to the planetary shaft fixing plate.

[0014] Furthermore, the drive device includes a bell housing, a torque sensor, a coupling device, and an integrated motor reducer; one end of the bell housing is connected to the cantilever support structure, and the other end is connected to the integrated motor reducer; the output shaft of the integrated motor reducer is connected to the shaft of the torque sensor through the coupling device, and the shaft of the torque sensor is connected to the transmission device.

[0015] A working method for a novel impact-cutting composite rock-breaking configuration of a cantilever tunneling machine, specifically including a cutting mode and an impact mode; In the cutting mode, the jacking device drives the impact breaker and the slider mechanism to move backward until the impact breaker's chisel is completely retracted into the cutting head; the drive device is activated to drive the transmission device, the rotating housing, and the cutting head to rotate, thereby realizing coal and rock cutting and rock breaking. In impact mode, the drive device is turned off, and the jacking device drives the impact breaker to move forward until the impact breaker's chisel contacts the coal and rock surface. The impact breaker impacts the coal and rock at a certain frequency, while the jacking device continues to provide jacking force to achieve continuous impact rock breaking deep into the coal and rock.

[0016] The beneficial effects of the novel impact-cutting composite rock-breaking configuration and working method of the cantilever tunneling machine described in this invention are as follows: (1) The novel impact-cutting composite rock breaking configuration and working method of the cantilever tunneling machine described in this invention can realize the operation and control of the driver's seat in terms of safe tunneling and efficient tunneling, replacing the traditional manual rock drilling method, reducing manpower, and thus reducing safety hazards; since the two working modes of this invention do not require the tunneling machine to be stopped for switching, only the cutting motor and the corresponding hydraulic pump need to be started and stopped, and the machine impact crushing speed is greater than that of manual rock drilling, which greatly improves the tunneling efficiency.

[0017] (2) The novel impact-cutting composite rock-breaking configuration and working method of the cantilever tunneling machine described in this invention, in terms of cutting load and cutting arm vibration, firstly, the coal and rock are broken by impact breaker to loosen them, and then the cutting mode is used to peel off the rock. Due to the presence of the T-sleeve, the radial vibration of the drill rod is buffered and will not have a large vibration impact on the cutting arm. In addition, the loose coal and rock result in a small cutting load and a reduced reaction force of the cutting arm, thereby reducing vibration. Furthermore, the torque sensor can monitor the load torque in real time. When the torque is too large, the machine can be stopped in time to prevent the motor from being damaged by excessive load. The torque limiting coupling can be set to a maximum torque. When the load torque is greater than the set value, the inner and outer rings of the coupling slip to release the torque, thereby protecting the cutting motor.

[0018] (3) The novel impact-cutting composite rock breaking configuration and working method of the cantilever tunneling machine described in this invention reduces the cutting force required by the cutting mode by pre-impact rock breaking, thereby reducing the wear of the cutting head teeth and extending the service life. In addition, the presence of the T-sleeve also reduces the wear of the impact breaker chisel and extends the service life of the chisel. Only the T-sleeve needs to be replaced periodically, which greatly reduces the maintenance cost. Attached Figure Description

[0019] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an improper limitation of the invention.

[0020] In the attached diagram: Figure 1 This is a structural schematic diagram of a novel impact-cutting composite rock-breaking configuration for a cantilever tunneling machine as described in this invention; Figure 2 This is a cross-sectional view of a novel impact-cutting composite rock-breaking configuration for a cantilever tunneling machine as described in this invention. Figure 3 This is a schematic diagram of the transmission device for a novel impact-cutting composite rock-breaking configuration of a cantilever tunneling machine according to the present invention. Figure 4 This is a schematic diagram of the first structure of the drive device for a novel impact-cutting composite rock-breaking configuration of a cantilever tunneling machine according to the present invention. Figure 5 This is a schematic diagram of the slewing bearing configuration of a novel impact-cutting composite rock-breaking configuration for a cantilever tunneling machine as described in this invention. Figure 6 This is a schematic diagram of a novel impact-cutting composite rock-breaking configuration cutting mode for a cantilever tunneling machine as described in this invention; Figure 7 This is a schematic diagram of a novel impact-cutting composite rock-breaking configuration impact mode for a cantilever tunneling machine according to the present invention; Figure 8 This is a schematic diagram of the second structure of the drive device for a novel impact-cutting composite rock-breaking configuration of a cantilever tunneling machine according to the present invention. The components are as follows: 1-Cutting head; 2-Impact breaker; 3-Pushing device; 4-Sliding block mechanism; 5-Rotating housing; 6-Fixed housing; 7-Transmission device; 701-Bearing seat; 702-Planetary gear; 703-Internal gear ring; 704-Planetary shaft; 705-Planetary shaft fixing plate; 706-Bearing one; 707-Sun gear; 708-Bearing two; 709-Bushing; 710-Fixed plate connecting bolt; 711-End shaft; 712-Locking retaining ring; 8-Drive device; 801-Bell housing; 802-Torque sensor; 803-Coupling; 804-Torque sensor support plate; 805-Integrated motor reducer; 806-Torque limiting coupling; 9-T-sleeve; 10-Rotating bearing one; 11-Rotating bearing three; 12-Rotating bearing two; 13-Cantilever support structure; 14-Impact breaker oil port. Detailed Implementation

[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. It should be noted that, unless otherwise specified, the embodiments and features described in the embodiments of the present invention can be combined with each other. The described embodiments are merely some embodiments of the present invention, not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0022] Specific implementation method one: See Figures 1-8 This embodiment describes a novel impact-cutting composite rock-breaking configuration for a cantilever tunneling machine. Specifically, it includes a cutting head 1, an impact breaker 2, a jacking device 3, a sliding block mechanism 4, a rotating housing 5, a fixed housing 6, a transmission device 7, and a drive device 8. The cutting head 1, rotating housing 5, fixed housing 6, and cantilever support structure 13 are connected sequentially, with the rotating housing 5 and fixed housing 6 rotatably connected. The fixed housing 6 houses the transmission device 7, one end of which is connected to the rotating housing 5, and the other end to the drive device 8. The drive device 8 is mounted on the cantilever support structure 13. The fixed housing 6 is fixedly installed on the front side of the cantilever support structure 13, and the drive device 8 is fixedly installed on the rear side of the cantilever support structure 13. This connection method avoids the cantilever tunneling machine's center of gravity being shifted forward, concentrating the center of gravity at the flange of the cantilever support structure 13, effectively reducing the possibility of the tunneling machine tipping forward due to excessive forward movement of the impact breaker 2.

[0023] The impact breaker 2 is coaxially mounted inside the cutting head 1, and its rear end is connected to the pusher device 3 mounted on the cantilever support structure 13. Driven by the pusher device 3, the front end of the impact breaker 2 extends out from the central hole on the cutting head 1. A T-shaped sleeve 9 is provided at the central hole of the impact breaker 2, through which the chisel of the impact breaker 2 passes. The T-shaped sleeve 9 serves as a radial buffer and protects the chisel, aiming to prevent relative collision or friction between the cutting head 1 and the chisel of the impact breaker 2 during impact or cutting operations, thereby reducing chisel wear. Wear only occurs on the inner side of the T-shaped sleeve 9, reducing maintenance and repair costs. A slider mechanism 4 is provided in the groove on the rotary housing 5, and the slider mechanism 4 is movably connected to the impact breaker 2. The pusher device 3 is a hinged hydraulic cylinder, with the cylinder body hinged to the two side flanges of the cantilever support structure 13, and the hydraulic cylinder piston rod hinged to the handle at the rear end of the impact breaker 2. The fixed housing 6 has through slots on both sides, and the handles symmetrically arranged at the rear end of the impact breaker 2 pass through the through slots and are hinged to the piston rod of the jacking device 3. The cantilever support structure 13 is a conventional and common structure for cantilever tunneling machines, designed to achieve stable support and vertical swing of the cantilever tunneling mechanism. The cantilever support structure 13 shown in the attached drawings are simplified schematic diagrams and do not represent the actual shape and structure.

[0024] A slewing bearing 10 is fitted onto the impact breaker 2; the inner ring of the slewing bearing 10 is connected to the impact breaker 2, and the outer ring is connected to the slider mechanism 4. A slewing bearing 31 is fitted onto the outer side of the slewing housing 5; the inner ring of the slewing bearing 31 is connected to the slewing housing 5, and the outer ring is connected to the fixed housing 6.

[0025] The transmission device 7 includes a bearing housing 701, four planetary gears 702, an internal gear ring 703, two planetary shafts 704, a planetary shaft fixing plate 705, a first bearing 706, a sun gear 707, four second bearings 708, four bushings 709, several fixing plate connecting bolts 710, an end shaft 711, and a locking ring 712; the sun gear 707 is connected to the drive device 8; the two planetary shafts 704 are symmetrically arranged inside the fixed housing 6, and the planetary shafts 704 are stepped shafts that are smaller at both ends and larger in the middle, with keyways of a certain length at both ends. Planetary gears 702 are provided at both ends of the 04 and are connected to the planetary gears 702 by a flat key; the planetary gear 702 at one end of the planetary shaft 704 meshes with the sun gear 707, and an internal gear ring 703 is provided on the outer side of the planetary gear 702 at the other end and meshes with it; the internal gear ring 703 is connected to the rotating housing 5; the drive device 8 drives the sun gear 707 to rotate, the sun gear 707 drives the planetary gear 702 that meshes with it, and transmits power to the planetary gear 702 at the other end through the planetary shaft 704 to drive the internal gear ring 703 to rotate, thereby driving the rotating housing 5 to rotate.

[0026] A second slewing bearing 12 is provided inside the rotating housing 5. From the inside out, a bushing 709, a second bearing 708, and a bearing seat 701 are sequentially arranged on the end of the planetary shaft 704 facing the cutting head 1. The bearing seat 701 is connected to the inner ring of the second slewing bearing 12, and the outer ring of the second slewing bearing 12 is connected to the rotating housing 5. The planetary shaft 704 passes through a through hole in the planetary shaft fixing plate 705, and a second bearing 708 and a bushing 709 are arranged between the planetary shaft 704 and the planetary shaft fixing plate 705. Threaded holes are provided at both ends of the planetary shaft fixing plate 705, which is connected to the fixing housing 6 by fixing plate connecting bolts 710. A locking ring 712 is provided at the end of the planetary shaft 704 facing the cantilever support structure 13. The axial and radial stable support of the planetary gear 702 is achieved through the bearing seat 701 at the front end of the planetary shaft 704, the planetary shaft fixing plate 705 at the rear end, and the locking ring 712.

[0027] The sun gear 707 is provided with an end shaft 711, and a bearing 706 is provided on the end shaft 711. The inner rings of the end shaft 711 and the bearing 706 are engaged, and the outer ring of the bearing 706 is connected to the planetary shaft fixing plate 705 to achieve stable axial and radial support for the sun gear 707.

[0028] The drive device 8 includes a bell housing 801, a torque sensor 802, a coupling device, a torque sensor support plate 804, and an integrated motor reducer 805. One end of the bell housing 801 is connected to the end flange of the cantilever support structure 13, and the other end is connected to the integrated motor reducer 805. The torque sensor 802 is fixed on the bell housing 801 through the torque sensor support plate 804. The output shaft of the integrated motor reducer 805 is connected to the shaft of the torque sensor 802 through the coupling device, and the shaft of the torque sensor 802 is connected to the sun gear 707 of the transmission device 7.

[0029] The bell housing 801 has symmetrical through slots on its outer circular surface, facilitating the connection of the torque sensor 802 to the signal line and its fastening to the coupling device. The torque sensor support plate 804 is welded to one side of the through slot of the bell housing 801, and the torque sensor 802 is fixedly connected to the torque sensor support plate 804. The torque sensor 802 monitors the load torque in real time, and can stop the machine promptly when the torque is too high to prevent damage to the motor. The torque sensor support plate 804 fixes the torque sensor 802, preventing the signal line from becoming entangled during operation. The integrated motor reducer 805 reduces the axial length of the cantilever tunneling mechanism, further shifting the center of gravity rearward. Combined with the transmission device 7, a large reduction ratio can still be achieved without the need for an additional reducer.

[0030] The coupling device is either coupling 803 or torque limiting coupling 806. Torque limiting coupling 806 can be set to a maximum torque. When the load torque is greater than the set value, the inner and outer rings of the coupling slip to release the torque, preventing the cutting head 1 from generating excessive torque when cutting hard rock and damaging the cutting motor.

[0031] The assembly process of the novel impact-cutting composite rock-breaking configuration of the cantilever tunneling machine described in this embodiment is as follows: The T-sleeve 9 is fixed to the small hole at the front end of the cutting head 1, the inner ring of the slewing bearing 311 is fixed to the outer circular step of the slewing housing 5, and the front end of the slewing housing 5 is fixed to the large hole at the rear end of the cutting head 1.

[0032] Slewing bearing 212 is inserted into the front end of impact breaker 2, the inner ring of slewing bearing 10 is fixed to the front end of impact breaker 2, and the slider mechanism 4 is fixed to the outer ring of slewing bearing 10.

[0033] The impact breaker 2, the slider mechanism 4, the first slewing bearing 10 and the second slewing bearing 12 are installed together in the slewing housing 5, so that the slider mechanism 4 is engaged with the sliding groove of the slewing mechanism 5.

[0034] The inner ring of the slewing bearing 212 is fixed to the inner circular step of the slewing housing 5.

[0035] A working method for a novel impact-cutting composite rock-breaking configuration of a cantilever tunneling machine, comprising a cutting mode and an impact mode; In the cutting mode, the piston rod of the jacking device 3 retracts, driving the impact breaker 2 and the slider mechanism 4 to move backward until the chisel of the impact breaker 2 is fully retracted into the cutting head 1; the drive device 8 is started, driving the transmission device 7, the rotating housing 5, and the cutting head 1 to rotate, thereby realizing coal and rock cutting and rock breaking. In impact mode, drive device 8 is turned off, piston rod of push device 3 extends, driving impact breaker 2 and slider mechanism 4 to move forward until the chisel of impact breaker 2 contacts the coal and rock surface. Then, the oil supply device at oil port 14 of impact breaker is activated, impact breaker 2 impacts coal and rock at a certain frequency, while push device 3 continues to provide push force. Piston rod extends slowly, realizing deep impact and continuous rock breaking in coal and rock.

[0036] To clearly describe the motion relationships of the main components, the motion of the perforated cutting head 1, impact breaker 2, slider mechanism 4, rotating housing 5, fixed housing 6, and internal gear ring 703 relative to the cantilever support structure 13 is listed in the table below:

[0037] For safety reasons, the cutting mode and impact mode cannot be operated simultaneously. The cutting mode requires the cantilever to swing and rise, while the impact mode requires the cantilever to remain stationary. Otherwise, during the impact operation of the impact breaker 2, the swinging or rising of the cantilever will cause the chisel of the impact breaker 2 to break.

[0038] In summary, the novel impact-cutting composite rock-breaking configuration and working method of the cantilever tunneling machine described in this invention enables driver-side operation control in both safe and efficient tunneling, replacing the traditional manual rock-drilling method, reducing manpower, and thus lowering safety hazards. Since the two working modes of this invention do not require the tunneling machine to be stopped for switching, only the cutting motor and the corresponding hydraulic pump need to be started and stopped, and the machine's impact crushing speed is greater than that of manual rock-drilling, the tunneling efficiency is greatly improved.

[0039] This invention discloses a novel impact-cutting composite rock-breaking configuration and operating method for a cantilever tunneling machine. Regarding the cutting load and cutting arm vibration of the tunneling machine, the impact breaker 2 first breaks the coal and rock, loosening them, before the cutting mode is used to peel away the rock. Due to the presence of the T-sleeve 9, the radial vibration of the impact breaker 2's chisel is buffered, preventing significant vibration impact on the cutting arm. Furthermore, the loosened coal and rock result in a smaller cutting load, reducing the reaction force of the cutting arm and thus minimizing vibration. Additionally, the torque sensor 802 monitors the load torque in real time, allowing for timely shutdown when the torque is too high to prevent damage to the motor. The torque limiting coupling 806 can be set to a maximum torque; when the load torque exceeds the set value, the inner and outer rings of the coupling slip to release the torque, thereby protecting the cutting motor.

[0040] The present invention discloses a novel impact-cutting composite rock-breaking configuration and working method for a cantilever tunneling machine. In terms of maintenance costs, by using the pre-impact mode to break rock, the cutting force required for the cutting mode is reduced, thereby reducing the wear of the cutting head teeth and extending the service life. In addition, the presence of the T-sleeve 9 also reduces the wear of the impact breaker 2 chisel rod, extending the service life of the chisel rod. Only the T-sleeve 9 needs to be replaced periodically, which greatly reduces maintenance costs.

[0041] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of the present invention. It should be understood that the above descriptions are merely specific embodiments of the present invention and are not intended to limit the invention. They can also be reasonable combinations of the features described in the above embodiments. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A novel impact-cutting composite rock-breaking configuration for a cantilever tunneling machine, characterized in that: The device includes a cutting head (1), an impact breaker (2), a jacking device (3), a rotating housing (5), a fixed housing (6), a transmission device (7), and a driving device (8). The cutting head (1), the rotating housing (5), the fixed housing (6), and the cantilever support structure (13) are connected in sequence. The rotating housing (5) and the fixed housing (6) are rotatably connected. The fixed housing (6) is equipped with a transmission device (7). One end of the transmission device (7) is connected to the rotating housing (5), and the other end is connected to the driving device (8). The driving device (8) is mounted on the cantilever support structure (13). The impact breaker (2) is coaxially disposed inside the cutting head (1), and its rear end is connected to the jacking device (3) disposed on the cantilever support structure (13). Under the drive of the jacking device (3), the front end of the impact breaker (2) extends out from the central hole on the cutting head (1).

2. The novel impact-cutting composite rock-breaking configuration of the cantilever tunneling machine according to claim 1, characterized in that: The rotating housing (5) is provided with a slider mechanism (4), which is movably connected to the impact breaker (2).

3. The novel impact-cutting composite rock-breaking configuration of the cantilever tunneling machine according to claim 2, characterized in that: The impact breaker (2) is fitted with a slewing bearing (10); the inner ring of the slewing bearing (10) is connected to the impact breaker (2), and the outer ring is connected to the slider mechanism (4).

4. The novel impact-cutting composite rock-breaking configuration of the cantilever tunneling machine according to claim 1, characterized in that: The outer side of the rotating housing (5) is fitted with a rotating bearing three (11); the inner ring of the rotating bearing three (11) is connected to the rotating housing (5), and the outer ring is connected to the fixed housing (6).

5. The novel impact-cutting composite rock-breaking configuration of the cantilever tunneling machine according to claim 1, characterized in that: The transmission device (7) includes several planetary gears (702), an internal gear ring (703), several planetary shafts (704), and a sun gear (707); the sun gear (707) is connected to the drive device (8); several planetary shafts (704) are evenly arranged around the circumference inside the fixed housing (6), and each planetary shaft (704) is provided with a planetary gear (702) at both ends; the planetary gear (702) at one end of the planetary shaft (704) meshes with the sun gear (707), and the planetary gear (702) at the other end is provided with an internal gear ring (703) on its outer side and meshes with it; the internal gear ring (703) is connected to the rotating housing (5).

6. The novel impact-cutting composite rock-breaking configuration of the cantilever tunneling machine according to claim 5, characterized in that: The inner side of the rotary housing (5) is provided with a rotary bearing (12). The end of the planetary shaft (704) facing the cutting head (1) is provided with a bushing (709), a bearing (708) and a bearing seat (701) from the inside to the outside. The bearing seat (701) is connected to the inner ring of the rotary bearing (12), and the outer ring of the rotary bearing (12) is connected to the rotary housing (5).

7. The novel impact-cutting composite rock-breaking configuration of the cantilever tunneling machine according to claim 5, characterized in that: The transmission device (7) also includes a planetary shaft fixing plate (705), through which the planetary shaft (704) passes and a bearing is provided between them; the planetary shaft fixing plate (705) and the fixed housing (6) are connected.

8. The novel impact-cutting composite rock-breaking configuration of the cantilever tunneling machine according to claim 7, characterized in that: The sun gear (707) is provided with an end shaft (711), and the end shaft (711) is rotatably connected to the planetary shaft fixing plate (705).

9. The novel impact-cutting composite rock-breaking configuration of the cantilever tunneling machine according to any one of claims 1-8, characterized in that: The drive device (8) includes a bell jar (801), a torque sensor (802), a coupling device, and an integrated motor reducer (805); one end of the bell jar (801) is connected to the cantilever support structure (13), and the other end is connected to the integrated motor reducer (805); the output shaft of the integrated motor reducer (805) is connected to the shaft of the torque sensor (802) through the coupling device, and the shaft of the torque sensor (802) is connected to the transmission device (7).

10. A working method for a novel impact-cutting composite rock-breaking configuration of a cantilever tunneling machine as described in claim 9, characterized in that: Including severing mode and impact mode; In the cutting mode, the jacking device (3) drives the impact breaker (2) and the slider mechanism (4) to move backward until the drill rod of the impact breaker (2) is completely retracted into the cutting head (1); the drive device (8) is started to drive the transmission device (7), the rotating housing (5) and the cutting head (1) to rotate, so as to realize coal and rock cutting and rock breaking; In impact mode, the drive device (8) is turned off, and the jacking device (3) drives the impact breaker (2) to move forward until the chisel of the impact breaker (2) contacts the coal and rock surface. The impact breaker (2) impacts the coal and rock at a certain frequency, while the jacking device (3) continues to provide jacking force to achieve continuous impact rock breaking deep into the coal and rock.

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