Transverse double support disc driving device suitable for hard rock cutting cutter head and tunneling machine

Abstract

The application discloses a transverse double-support disc-shaped driving device suitable for a hard rock cutting cutter head, which is novel and reasonable in structure, compact in layout, adopts a low-speed large-torque motor as a driving source, can effectively guarantee cutting power of the hard rock cutting cutter head, reduces labor intensity of workers, improves working efficiency of the hard rock tunneling machine, and realizes rapid tunneling and guarantees working efficiency of mechanical equipment. In addition, the transverse double-support disc-shaped driving device suitable for the hard rock cutting cutter head reserves double support points for a cantilever, namely an open end of a motor seat and a non-circular mounting seat on a support frame, the two support points are located at two axial ends of the transverse double-support disc-shaped driving device suitable for the hard rock cutting cutter head, and thus double-arm support is formed, that is, one side arm is inlaid and mounted in a recess hole of the motor seat through connecting bolts, and the other side arm is connected and supported with the non-circular mounting seat. The cantilever double-side connection mode can effectively improve reliability of the support arm.

Description

Technical Field

[0001] This invention relates to the field of coal mining machinery, and in particular to a transverse double-support disc drive device and tunneling machine suitable for hard rock cutting discs. Background Technology

[0002] Currently, the annual tunneling footage of key state-owned coal mines is about 10,000 km, of which more than 2,000 km are rock tunnels. As the proportion of rock tunnels increases year by year, the imbalance between mining and tunneling has been further aggravated. Moreover, the development of hard rock (rock hardness > f10) tunnels in coal mines and the mining of metal mines mainly adopt the drilling and blasting method, which has a low degree of mechanization and poor safety.

[0003] Existing mechanized tunneling projects have largely solved the technical challenges of mechanized tunneling in rock with a hardness of less than 100 MPa. However, due to limitations imposed by rock-breaking mechanisms and the characteristics of pick-shaped cutting teeth, the maximum rock hardness that cantilever tunneling machines can currently cut is 120 MPa. With the increasing hardness of the rock being cut, problems such as cutting tooth wear and component failure are becoming increasingly prominent. Simply relying on the existing rock-breaking mechanism of pick-shaped cutting teeth and increasing cutting power and overall machine weight to enhance rock-breaking capacity is no longer sufficient to meet current needs.

[0004] With the introduction of full-face TBMs (Tunnel Boring Machines) into underground coal mines, people have gradually realized that the disc cutters used in full-face TBMs have a great advantage over pick-shaped cutters in cutting hard rock. However, due to the size of the TBM and the shape of the cutterhead, disc cutters have inherent shortcomings when used in coal mines, such as difficulty in assembly, large turning radius, difficulty in correction and adjustment, and the inability to cut only circular cross-sections. Most mines still cannot use full-face TBMs for hard rock cutting due to working conditions, and to a large extent, they still cannot improve the imbalance between mining and excavation ratios.

[0005] To adapt to the development of underground tunnels with high rock hardness, existing technologies have proposed partial-section hard rock cutting cutterheads based on rolling technology. These cutterheads feature strong cutting capacity, flexible cutting posture adjustment, and easy disassembly and assembly, and are suitable for tunnels with non-circular cross-sections. However, current cutterhead drive mechanisms cannot effectively guarantee the cutting power of the hard rock cutting cutterhead, resulting in low working efficiency of hard rock tunneling machines and hindering rapid tunneling. Summary of the Invention

[0006] The purpose of this invention is to provide a transverse double-support disc drive device and tunneling machine suitable for hard rock cutting head, so as to solve the problem that the existing cutter head drive mechanism cannot effectively guarantee the cutting power of the hard rock cutting head, resulting in low working efficiency of hard rock tunneling machine.

[0007] To achieve the above objectives, the present invention provides the following solution:

[0008] This invention provides a transverse double-support disc-shaped drive device suitable for hard rock cutting discs, comprising:

[0009] Low-speed, high-torque motor;

[0010] The motor housing is in the shape of a concave disc, and the low-speed, high-torque motor is embedded in the concave hole of the motor housing;

[0011] A planetary gear assembly includes a support frame, a sun gear, a drive gear, and multiple planetary gears. The support frame is located on the side of the motor mount opposite to the recess and is coaxially connected to the motor mount. A non-circular mounting base is formed by the center of the support frame protruding towards the side opposite to the motor mount. The sun gear and multiple planetary gears are located between the support frame and the motor mount. The sun gear is coaxial with the support frame, and the multiple planetary gears are evenly distributed on the outer periphery of the sun gear and all mesh with the sun gear. Any one of the planetary gears is rotatably connected to the support frame. The drive gear is sleeved on the outer periphery of all the planetary gears and meshes with any one of the planetary gears.

[0012] The main drive shaft has its first end connected to the output end of the low-speed, high-torque motor, and its second end passing through the center of the motor housing and the sun gear, and connected to the sun gear.

[0013] A drive disc is rotatably mounted on the outer periphery of the motor base and connected to the drive wheel; the outer periphery of the drive disc is used to mount a hard rock cutting disc.

[0014] Optionally, a three-row roller bearing is provided between the drive disk and the motor base, with the inner ring of the three-row roller bearing connected to the motor base and the outer ring of the three-row roller bearing connected to the drive disk.

[0015] Optionally, a support ring protrudes radially inward from the center of the inner ring of the drive disk. The inner ring of the support ring extends axially toward the support frame to form an axially extended ring segment. A skeleton oil seal is provided between the inner ring of the axially extended ring segment and the outer ring of the motor base. The support ring divides the annular gap between the inner ring of the drive disk and the outer ring of the motor base into mutually isolated bearing cavities and gear cavities along the axial direction. The three-row roller bearing is located in the bearing cavity, and the sun gear, the drive gear, and the planet gear are located in the gear cavity.

[0016] Optionally, a first end cap is provided at the end of the drive disk facing the low-speed, high-torque motor, and a skeleton oil seal is provided between the outer periphery of the opening of the recess of the motor seat and the inner ring of the drive disk, and the skeleton oil seal abuts against the first end cap. A closed bearing cavity is formed between the drive disk, the support ring and the motor seat, and a first lubricating oil inlet hole communicating with the bearing cavity is also provided at the edge of the opening of the recess of the motor seat.

[0017] A second end cap is provided at the end of the drive disk opposite to the low-speed, high-torque motor. The inner ring of the second end cap is movably fitted with the support frame, and a dustproof ring and a floating seal are provided between the inner ring of the second end cap and the support frame. The drive disk, the support ring, the motor seat, the support frame, and the second end cap form a closed gear cavity. A second lubricating oil inlet hole communicating with the gear cavity is also provided on the drive disk.

[0018] Optionally, it also includes a lubricating oil cooling system disposed on the outside of the support frame. The lubricating oil cooling system includes an oil extraction pipe, a hydraulic pump, a cooler and an oil injection pipe connected in sequence. The hydraulic pump is connected to a motor. The oil extraction pipe and the oil injection pipe both pass through the support frame and communicate with the gear cavity. The oil extraction pipe and the oil injection pipe are located at different positions in the gear cavity.

[0019] Optionally, the motor base is provided with a plurality of arc-shaped positioning grooves evenly distributed along the circumference at one end facing the support frame; the support frame is provided with a plurality of arc-shaped positioning protrusions that are adapted to and correspond one-to-one with the arc-shaped positioning grooves at one end facing the motor base.

[0020] The support frame has a plurality of fixed pins evenly arranged on the outer periphery of the sun gear. The fixed pins and the arc-shaped positioning protrusions are staggered in the circumferential direction. Each fixed pin is equipped with a planetary gear, and each planetary gear is connected to the corresponding fixed pin with a self-aligning bearing. The end of the motor seat facing the support frame is also provided with positioning recesses that are adapted to and correspond to the fixed pins.

[0021] Optionally, the outer periphery of the drive disk is provided with a plurality of grooves along its circumferential direction.

[0022] Optionally, a cylindrical roller bearing is also provided between the motor housing and the main drive shaft, with the inner retaining ring of the cylindrical roller bearing sleeved on the main drive shaft and the outer retaining ring of the cylindrical roller bearing connected to the motor housing.

[0023] Optionally, a tapered roller bearing is further provided between the second end of the main drive shaft and the inner ring of the support frame, and an inner end cap for fixing the inner ring of the tapered roller bearing is provided at the second end of the main drive shaft.

[0024] The support frame has a bearing outer end cap for fixing the outer ring of the tapered roller bearing at one end away from the motor seat. An observation hole is provided in the center of the bearing outer end cap, and a sealing ring is provided between the bearing outer end cap and the support frame.

[0025] The present invention also proposes a tunneling machine, including a hard rock cutting head and a transverse double-support disc-shaped drive device for hard rock cutting heads as described in any one of the above-mentioned embodiments, wherein the hard rock cutting head is fitted around the outer periphery of the drive disc.

[0026] The present invention achieves the following technical effects compared to the prior art:

[0027] The present invention proposes a transverse double-support disc drive device suitable for hard rock cutting discs. It features a novel and rational structure, a compact layout, and utilizes a low-speed, high-torque motor as the drive source. This effectively ensures the cutting power of the hard rock cutting disc, reduces worker labor intensity, and improves the working efficiency of the hard rock tunneling machine, thereby achieving rapid tunneling and guaranteeing the efficiency of the machinery. Furthermore, this transverse double-support disc drive device for hard rock cutting discs provides two pre-reserved support points for the cantilever: the open end of the motor base and the non-circular mounting seat on the support frame. These two support points are located at the axial ends of the transverse double-support disc drive device, forming a double-arm support. One arm is embedded in the recessed hole of the motor base via connecting bolts, while the other arm is connected and supported by the non-circular mounting seat. This double-sided connection method of the cantilever effectively improves the reliability of the support arm. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 This is a schematic diagram of the structure of the transverse double-support disc drive device for hard rock cutting disc disclosed in the embodiments of the present invention when the lubricating oil cooling system is not installed;

[0030] Figure 2 This is a schematic diagram of the installation of the lubricating oil cooling system for the transverse double-support disc drive device suitable for hard rock cutting discs disclosed in an embodiment of the present invention;

[0031] Figure 3 This is a schematic diagram of one end of the motor mount disclosed in an embodiment of the present invention;

[0032] Figure 4 This is a schematic diagram of the other end of the motor mount disclosed in the embodiment of the present invention;

[0033] Figure 5 This is a schematic diagram of the connection between the motor housing and the inner ring of the three-row roller bearing disclosed in an embodiment of the present invention;

[0034] Figure 6 This is a schematic diagram of the drive disk structure disclosed in the embodiments of the present invention;

[0035] Figure 7 This is a schematic diagram of the structure of the drive disk being mounted on the outer periphery of the motor mount according to an embodiment of the present invention;

[0036] Figure 8 This is a schematic diagram of the mounting structure of the main drive shaft and the sun gear disclosed in an embodiment of the present invention;

[0037] Figure 9 This is a schematic diagram of the installation structure of the sun gear, planet gears and drive wheel disclosed in the embodiments of the present invention;

[0038] Figure 10 This is a schematic diagram of one end of the support frame disclosed in an embodiment of the present invention;

[0039] Figure 11 This is a schematic diagram of the other end of the support frame disclosed in the embodiment of the present invention;

[0040] Figure 12 This is a schematic diagram of the planetary gear assembly disclosed in the embodiments of the present invention;

[0041] Figure 13 This is a schematic diagram of the axial cross-sectional structure of the planetary gear assembly disclosed in the embodiments of the present invention;

[0042] Figure 14 This is a schematic diagram of the assembly structure of the bearing inner end cover and the bearing outer end cover disclosed in the embodiments of the present invention;

[0043] Figure 15 This is a schematic diagram of the transverse double-support disc drive device for hard rock cutting discs disclosed in an embodiment of the present invention when the motor is not installed;

[0044] Figure 16 This is an isometric view of a transverse double-support disc drive device for hard rock cutting discs disclosed in an embodiment of the present invention.

[0045] The attached figures are labeled as follows:

[0046] 100. A transverse double-support disc drive device suitable for hard rock cutting discs;

[0047] 1. Plug 1; 2. Fixing Bolt; 3. First End Cap; 4. Oil Seal; 5. Plug 2; 6. Drive Disc; 61. Support Ring; 62. Axial Extension Ring Segment; 63. Groove; 64. Internal Spline; 7. Second End Cap; 8. Limiting Pin; 9. Drive Wheel; 10. Dust Ring; 11. Floating Seal; 12. Connecting Bolt; 13. Fixing Pin; 14. Bearing Retaining Ring; 15. Self-aligning Bearing; 16. Spacer Sleeve; 17. Tapered Roller Bearing; 18. Screw 1; 19. Plug 3; 20. Inner Bearing End Cap; 21. Screw 2; 22. O-ring Seal; 23. Outer Bearing End Cap; 24. Support Frame; 241. Arc-shaped positioning protrusion; 242. Non-circular mounting base; 25. Connecting bolt one; 26. Three-row roller bearing; 27. Plug four; 28. Connecting bolt two; 29. ​​Motor base; 291. Concave hole; 292. Arc-shaped positioning groove; 293. Positioning concave hole; 30. Fixing screw one; 31. Fixing screw two; 32. Planetary gear; 33. Outer retaining ring; 34. Cylindrical roller bearing; 35. Inner retaining ring; 36. Main drive shaft; 37. Low-speed high-torque motor; 38. Oil suction pipe; 39. Motor; 40. Oil pipe; 41. Cooler; 42. Oil injection pipe; 43. Hydraulic pump; 44. Sun gear. Detailed Implementation

[0048] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0049] One of the objectives of this invention is to provide a transverse double-support disc drive device suitable for hard rock cutting discs, in order to solve the problem that existing disc drive mechanisms cannot effectively guarantee the cutting power of hard rock cutting discs, resulting in low working efficiency of hard rock tunneling machines.

[0050] Another object of the present invention is to provide a tunneling machine comprising a transverse double-support disc drive device suitable for hard rock cutting discs.

[0051] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0052] Example 1

[0053] like Figures 1 to 16As shown, this embodiment provides a transverse double-support disc-shaped drive device 100 suitable for hard rock cutting discs, including a low-speed, high-torque motor 37, a motor base 29, a planetary gear assembly, a main drive shaft 36, and a drive disc 6. The motor base 29 is generally a concave disc shape. The low-speed, high-torque motor 37 is typically a low-speed, high-torque hydraulic motor, which is embedded in the recess 291 of the motor base 29. The planetary gear assembly includes a support frame 24, a sun gear 44, a drive wheel 9, and multiple planetary gears 32. The support frame 24 is located on the side of the motor base 29 opposite to the recess 291 and is connected to the drive disc 6. The motor mount 29 is coaxially connected to the support frame 24, which protrudes from the center of the support frame 24 away from the motor mount 29 to form a non-circular mounting base 242. The sun gear 44 and multiple planet gears 32 are located between the support frame 24 and the motor mount 29. The sun gear 44 is coaxial with the support frame 24, and the multiple planet gears 32 are evenly distributed on the outer periphery of the sun gear 44 and all mesh with it. Any planet gear 32 is rotatably connected to the support frame 24. The drive wheel 9 is sleeved on the outer periphery of all planet gears 32 and meshes with any planet gear 32. This planet gear assembly mainly serves as a power transmission component. The first end of the main drive shaft 36 (e.g., Figure 1 and Figure 2 The left end shown is connected to the output end of the low-speed, high-torque motor 37, and the second end (as shown on the left) is connected to the output end of the low-speed, high-torque motor 37. Figure 1 and Figure 2The right end (shown) passes through the center of the motor base 29 and the sun gear 44 and is connected to the sun gear 44. The second end of the main drive shaft 36 generally extends to the non-circular mounting base 242, but does not pass through the support frame 24. The drive disc 6 serves as the output end of the entire drive device. Its rotation is sleeved on the outer periphery of the motor base 29 and connected to the drive wheel 9. The outer periphery of the drive disc 6 is used to install the hard rock cutting disc to drive the hard rock cutting disc to rotate. The above-mentioned transverse double-support disc drive device 100 suitable for hard rock cutting discs uses a low-speed, high-torque motor as the drive source, which can effectively ensure the cutting power of the hard rock cutting disc, reduce the labor intensity of workers, improve the working efficiency of the hard rock tunneling machine, thereby achieving rapid tunneling and ensuring the working efficiency of the mechanical equipment. The transverse double-support disc drive device 100 for hard rock cutting discs is generally cylindrical. It has two pre-reserved support points for the cantilever: the open end of the motor base 29 and the non-circular mounting base 242 on the support frame 24. These two support points are located at opposite axial ends of the transverse double-support disc drive device 100, forming a double-arm support. One arm is embedded in the recess 291 of the motor base 29 via connecting bolt 28, while the other arm is connected and supported by the non-circular mounting base 242. This cantilever double-sided connection effectively improves the reliability of the support arms. It should be noted that the non-circular mounting base 242 is generally designed as a prism structure coaxial with the support frame 24, specifically a square prism, hexagonal prism, or octagonal prism, but a cylindrical shape should be avoided. If a cylindrical shape is used, the axial rotation direction cannot be limited during drive device operation, affecting not only the function of the support device but also reducing the service life of the drive device. In actual operation, the axial length of the transverse double-support disc drive device 100, which is suitable for hard rock cutting discs, is 1500mm and the diameter φ is 2380mm.

[0054] In this embodiment, the drive disk 6 and the motor base 29 are rotated relative to each other by a three-row roller bearing 26. The inner ring of the three-row roller bearing 26 is connected to the motor base 29 by a connecting bolt 28, and the outer ring of the three-row roller bearing 26 is connected to the drive disk 6 by a connecting bolt 25.

[0055] In this embodiment, a support ring 61 protrudes radially inward from the center of the inner ring of the drive disk 6. The inner ring of the support ring 61 extends axially toward the support frame 24 along its axial direction to form an axially extending ring segment 62. Thus, the radial cross-section of the support ring 61 is an "L" shaped structure. Figure 1 and Figure 2As shown, the inner ring of the axially extending ring 62 and the outer ring of the motor base 29 are clearance-fitted, and a skeleton oil seal 4 is provided between them. The annular gap between the inner ring of the drive disc 6 and the outer ring of the motor base 29 is axially separated into mutually isolated bearing cavities and gear cavities via the support ring 61. The three-row roller bearing 26 is located in the bearing cavity, while the sun gear 44, drive gear 9, and planet gear 32 are located in the gear cavity. To ensure the long-term stable and efficient operation of the drive device, lubricating oil or grease can be injected into the bearing cavity and gear cavity to lubricate and maintain the bearings and gears. To prevent lubricating oil leakage, the bearing cavity and gear cavity need to be sealed, as detailed below: Figure 1 and Figure 2 As shown, a first end cap 3 is provided at the end of the drive disk 6 facing the low-speed, high-torque motor 37. A clearance fit is made between the outer periphery of the opening of the recess 291 of the motor seat 29 and the inner ring of the drive disk 6, and a skeleton oil seal 4 is provided between them, thereby forming a closed bearing cavity between the drive disk 6, the support ring 61, and the motor seat 29. A first lubricating oil inlet hole communicating with the bearing cavity is also provided at the edge of the opening of the recess 291 of the motor seat 29. This first lubricating oil inlet hole can be sealed by a screw plug 1 when no lubricating oil needs to be injected. Generally, it is preferable that the skeleton oil seal 4 between the outer periphery of the opening of the recess 291 of the motor seat 29 and the inner ring of the drive disk 6 abuts against the first end cap 3. That is, the skeleton oil seal 4 is located at the convergence of the first end cap 3, the outer periphery of the outer end of the motor seat 29, and the edge of the inner ring of the drive disk 6. This effectively prevents lubricating oil leakage from the bearing cavity and also prevents external dust or impurities from entering the gap between the outer periphery of the opening of the recess 291 of the motor seat 29 and the inner ring of the drive disk 6. The bearing cavity mentioned above is generally filled with lubricating grease.

[0056] Similarly, in this embodiment, a second end cover 7 is provided at the end of the drive disc 6 away from the low-speed, high-torque motor 37. The inner ring of the second end cover 7 is movably sleeved with the support frame 24, and a dustproof ring 10 and a floating seal 11 are provided between the inner ring of the second end cover 7 and the support frame 24, thereby forming a closed gear cavity between the drive disc 6, the support ring 61, the motor seat 29, the support frame 24, and the second end cover 7. A second lubricating oil inlet is provided on the drive disc 6, which communicates with the gear cavity. By isolating the bearing cavity from the gear cavity, mutual contamination between the two cavities can be effectively avoided, which would affect the overall lifespan and performance of the hard rock cutting disc drive device. The gear cavity generally contains lubricating oil.

[0057] Furthermore, such as Figure 2As shown, this embodiment also includes a dedicated lubricating oil cooling system located outside the support frame 24. This system primarily comprises a suction pipe 38, a hydraulic pump 43, a cooler 41, and an injection pipe 42 connected in sequence. The hydraulic pump 43 is connected to the motor 39. Both the suction pipe 38 and the injection pipe 42 penetrate the support frame 24 and communicate with the enclosed gear cavity. The suction pipe 38 and the injection pipe 42 are located at different positions within the gear cavity. Because the gear cavity is a closed structure, its connection with the external lubricating oil cooling system forms a closed-loop internal circulation injection lubrication and cooling system, which reduces the temperature rise rate of the entire drive unit and improves its service life.

[0058] In this embodiment, the motor base 29 is provided with a plurality of arc-shaped positioning grooves 292 evenly distributed along the circumferential direction at one end facing the support frame 24; correspondingly, the support frame 24 is provided with a plurality of arc-shaped positioning protrusions 241 that are adapted to and correspond one-to-one with the arc-shaped positioning grooves 292 at one end facing the motor base 29. The motor base 29 and the support frame 24 are connected and positioned by the adaptation of the arc-shaped positioning protrusions 241 and the arc-shaped positioning grooves 292. Multiple fixed pins 13 are evenly arranged on the outer periphery of the sun gear 44 on the support frame 24. The fixed pins 13 and the arc-shaped positioning protrusions 241 are staggered in the circumferential direction. A planetary gear 32 is installed on any fixed pin 13, and a self-aligning bearing 15 is provided between any planetary gear 32 and the corresponding fixed pin 13. The end of the motor seat 29 facing the support frame 24 is also provided with positioning recesses 293 that are adapted to and correspond one-to-one with the ends of the fixed pins 13. In the normal assembly state, the ends of the fixed pins 13 are inserted into the positioning recesses 293 to achieve positioning. As a preferred embodiment, three planetary gears 32 are provided on the outer periphery of the sun gear 44. Correspondingly, three fixed pins 13 and three arc-shaped positioning protrusions 241 are also provided. Preferably, the center of the fixed pin 13 and the center arc of the arc-shaped positioning protrusion 241 are located on the same circumference. The fixing pin 13 can be integrally formed on the support frame 24, or it can be detachably installed on the support frame 24, such as... Figures 10-13 As shown, on the support frame 24, there are pre-drilled pin mounting holes between each pair of adjacent arc-shaped positioning protrusions 241 for the fixing pin 13 to pass through. After the fixing pin 13 passes through the corresponding pin mounting hole, it is connected to the support frame 24 through the end plate at the end.

[0059] In this embodiment, the outer periphery of the drive disc 6 is provided with several grooves 63. The purpose of providing the grooves 63 is to allow the hard rock cutting disc installed on the outer ring to smoothly discharge rock debris during the cutting of hard rock, avoiding jamming, which would prevent the cutter from operating normally, causing wear and reducing the service life of the cutter. The grooves 63 are generally inverted trapezoidal grooves, such as... Figure 1 and Figure 2As shown, the axial section of the groove 63 is an inverted trapezoid, with its larger end facing the outer periphery of the drive disk 6 and its smaller end facing the center of the drive disk 6. The grooves 63 are generally evenly distributed along the circumference of the drive disk 6. The specific arrangement of the grooves 63 on the drive disk 6 can be set according to actual needs, such as setting one ring of grooves 63 on the drive disk 6, or setting multiple rings of grooves 63 at intervals along the axial direction of the drive disk 6.

[0060] In this embodiment, the drive wheel 9 is fitted onto the inner ring of the drive disc 6, such as... Figure 6 As shown, the inner ring of the drive disc 6 is provided with an inner spline 64, and the outer ring of the drive wheel 9 is provided with an outer spline that matches the inner spline 64. The drive wheel 9 is connected to the inner spline 64 by matching its outer spline with the inner spline 64.

[0061] In this embodiment, a cylindrical roller bearing 34 is also provided between the motor base 29 and the main drive shaft 36. The inner retaining ring 35 of the cylindrical roller bearing 34 is sleeved on the main drive shaft 36, and the outer retaining ring 33 of the cylindrical roller bearing 34 is connected to the motor base 29.

[0062] In this embodiment, the second end of the main drive shaft 36 (e.g.) Figure 1 and Figure 2 A tapered roller bearing 17 is also provided between the right end shown and the inner ring of the support frame 24. The second end of the main drive shaft 36 is also provided with an inner bearing end cap 20 for fixing the inner ring of the tapered roller bearing 17. An outer bearing end cap 23 for fixing the outer ring of the tapered roller bearing 17 is provided at the end of the support frame 24 away from the motor seat 29. An observation hole is provided in the center of the outer bearing end cap 23. A sealing ring is provided between the outer bearing end cap 23 and the support frame 24. The sealing ring is preferably an O-ring 22.

[0063] The connection relationships and assembly methods of the components in the above-mentioned transverse double-support disc drive device 100 suitable for hard rock cutting discs are as follows:

[0064] I. For example Figure 1 As shown, using the motor housing 29 as the base, connecting bolts 28 are used to connect the inner ring of the three-row roller bearing 26 to the motor housing 29, as follows. Figure 3 As shown, the motor housing 29 has three through holes at the open end of the recess 291. The middle through hole is a bolt hole, mainly used to connect bolt 28 to connect the inner ring of the three-row roller bearing 26, the motor housing 29, and the cutting arm, providing support and fixation. The innermost through hole is also a bolt hole, mainly used to connect to the flange of the low-speed, high-torque motor 37 to fix the motor. Due to the limitations of the tunnel cross-section and the overall machine structure, the maximum width of the drive unit of the hard rock tunneling machine cannot exceed 1.5m. Therefore, the low-speed, high-torque motor 37 is embedded inside the recess 291. Figure 1 and Figure 2It is known that the outermost through hole of the motor housing 29 is the oil inlet, namely the first lubricating oil inlet mentioned above. Its purpose is to inject grease into the bearing cavity oil bath to lubricate the three-row roller bearing 26 and enhance the service life of the three-row roller bearing 26.

[0065] 2. Install the drive disc 6, equipped with the skeleton oil seal 4, into the motor base 29, and connect the drive disc 6 to the outer ring of the three-row roller bearing 26 using connecting bolt 25. The three-row roller bearing 26 is used because the drive unit experiences large overturning moments, radial forces, and axial forces during operation, resulting in strong vibrations. The three-row roller bearing 26 has three separate raceways on the right, with separate upper, lower, and radial raceways, and a robust structure, enabling it to withstand various loads simultaneously.

[0066] Both ends of the drive disc 6 have threaded holes for mounting the first end cover 3 and the second end cover 7, which rotate synchronously with it. Multiple oil inlets are located on its central sidewall for injecting gear oil into the gear cavity oil bath to lubricate the planetary gear assembly and drive wheel 9, thus extending the service life of the transmission components. The support ring 61 of the inner ring of the drive disc 6 has an "L"-shaped radial cross-section. Its purposes are: ① to provide support and connect the three-row roller bearing 26; ② to increase the contact area with the motor seat 29, facilitating the design of the mounting groove for the skeleton oil seal 4. It should also be noted that the skeleton oil seal 4, located between the inner ring of the support ring 61 and the outer ring of the motor seat 29, is preferably made of hard rubber. The skeleton oil seal 4, in conjunction with the support ring 61, can separate the two different oil baths in the bearing cavity and the gear cavity, preventing damage to one side from affecting the other.

[0067] 3. Install the inner retaining ring 35, the cylindrical roller bearing 34, the outer retaining ring 33, and other parts of the cylindrical roller bearing 34, and install the main drive shaft 36. Here, the purpose of selecting the cylindrical roller bearing is to provide support and prevent the left side of the main drive shaft 36 (the part near the motor) from being too suspended and experiencing uneven stress, thus reducing the service life of the main drive shaft 36.

[0068] Fourth, install the drive wheel 9. After the drive wheel 9 is splined into the drive disk 6, use the limiting pin 8 to fix it to the drive disk 6. Since there is a boss limiting the drive wheel 9 on the left side and the drive disk 6 on the right side, the limiting pin 8 is used to axially limit and fix it to prevent the drive wheel 9 from moving to the right.

[0069] 5. Install the planetary gear assembly. (For example...) Figure 9As shown, three planetary gears 32 are placed at the centers of the three holes in the motor mount 29 and are concentrically fitted with them. The three planetary gears 32 mesh with both the sun gear 44 on the main drive shaft 36 and the drive wheel 9. After the planetary gear assembly is installed with the drive disc 6, the second end cover 7 is connected to the drive disc 6 with bolts, and the support frame 24 equipped with the dust seal 10 and the floating seal 11 is connected to the motor mount 29. Next, three fixing pins 13 are installed on the support frame 24, so that the three fixing pins 13 pass through the centers of the three planetary gears 32 respectively, and are fixed to the support frame 24 with bolts.

[0070] Here, the support frame 24 is designed with three crescent-shaped bosses with threaded holes, namely arc-shaped positioning bosses 241. Their main purpose is to be positioned and connected with the three arc-shaped positioning grooves 292 designed at the bottom of the motor seat 29, and play a role in left and right connection limit and force support during the operation of the drive device; the three circular positioning recesses 293 are mainly used to place the fixing pin 13, and play a role in supporting the fixing pin 13.

[0071] The support frame 24 panel is also designed with two smaller through holes, the purpose of which is to pass through the oil suction pipe 38 and the oil injection pipe 42 to circulate the oil, enhance the lubrication effect on the transmission components, and extend the service life of the system.

[0072] The non-circular mounting base 242 on the support frame 24 is designed to connect with the fork-shaped cantilever. It can be designed as a connecting support boss with a quadrilateral, hexagonal, or octagonal cross-section. Taking a quadrilateral support boss as an example, the fork-shaped cantilever has a corresponding square groove for easy positioning. However, the non-circular mounting base 242 cannot be designed as a cylinder because the other side of the fork-shaped cantilever is connected to the motor seat 29 via bolts. If a cylindrical boss is designed, the drive device experiences significant resistance during operation. Through force transmission, the bolt connecting the fork-shaped cantilever and the motor seat 29 will be subjected to considerable shear force, easily leading to damage and reduced service life.

[0073] VI. A tapered roller bearing 17 is installed at the end of the main drive shaft 36. A boss on the left side provides a limiting feature, and an inner end cap 20 on the right side limits the inner ring of the tapered roller bearing 17. The inner end cap 20 is fixed to the end of the main drive shaft 36 with screws. Simultaneously, a horseshoe-shaped outer end cap 23 is installed outside the inner end cap 20. The outer end cap 23 is fixed to the boss of the support frame 24 with screws 21 to limit the outer ring of the tapered roller bearing 17. Here, the horseshoe-shaped outer end cap 23 has an observation hole in the middle to observe the gear lubricating oil level, preventing damage to the planetary gear assembly due to untimely lubrication and reducing the service life of the drive unit. The horseshoe-shaped outer end cap 23 has an O-ring groove for installing O-ring seals 22, preventing dust from entering and damaging the transmission device, thus reducing the service life of the drive unit. The observation hole on the support frame 24 is generally sealed with a screw plug 19.

[0074] 7. After installing the skeleton oil seal 4 between the outer periphery of the motor base 29 and the inner ring of the drive disk 6, use the fixing bolts 2 to connect the first end cover 3 to the drive disk 6 to prevent dust from entering the bearing cavity and damaging the bearing. After assembling the low-speed high-torque motor 37 with the main drive shaft 36, use the fixing screws 30 to connect the low-speed high-torque motor 37 to the innermost through hole of the motor base 29.

[0075] 8. Install a lubricating oil cooling system, such as Figure 2 As shown, the motor 39, hydraulic pump 43, cooler 41, and oil pipe 40 are installed outside the drive unit. The oil extraction pipe 38 and oil injection pipe 42 are respectively installed in the two holes of the support frame 24. Grease is injected into the bearing cavity through the screw plug 1 to lubricate the bearing, and lubricating oil is injected into the gear cavity through the screw plug 5 to lubricate the gears. This completes the installation of a novel hard rock cutting disc drive unit. Finally, the hard rock cutting disc is installed on the drive unit, and the drive unit is installed on the cantilever for application.

[0076] The working principle of the transverse double-support disc drive device 100 suitable for hard rock cutting discs in this embodiment will be explained in detail below.

[0077] In actual operation, planetary gear 32 is generally set as an idler gear (only changing the direction of rotation, not the transmission ratio). Low-speed, high-torque motor 37 drives main drive shaft 36 to rotate. Main drive shaft 36 drives sun gear 44 to rotate. Sun gear 44 drives three idler gears to rotate around their respective fixed pin shafts 13. The idler gears drive drive wheel 9 to rotate, thereby driving drive disc 6 to rotate, so as to drive hard rock cutting disc.

[0078] The hydraulic pump 43, cooler 41, and oil pipe 40 are installed outside the drive unit. When the drive unit is working, the motor 39 and hydraulic pump 43 are started. The gear lubricating oil is cooled by the hydraulic pump 43 and cooler 41 from the bottom of the gear cavity of the drive unit, and then sprayed from the oil injection pipe 42 to the top of the gear cavity (the bottom and top of the gear cavity correspond to the radial ends or chord ends of the gear cavity, respectively), so as to achieve the purpose of internal circulation cooling and oil spraying lubrication of the planetary gear assembly.

[0079] The partial-section hard rock cutting head based on rolling technology combines the advantages of cantilever tunneling machines and full-face TBMs, and features strong cutting capacity, flexible cutting posture adjustment, and easy disassembly and assembly. It is suitable for rectangular roadways. The main technical challenge lies in the design of a high-efficiency transverse double-support disc drive device. Therefore, this technical solution proposes the aforementioned transverse double-support disc drive device 100 suitable for hard rock cutting heads, opening up a new way and a new journey for hard rock cutting. The low-speed, high-torque motor drive effectively ensures the cutting power of the hard rock cutting head, improves the working efficiency of hard rock tunneling machines, and significantly narrows the gap between my country and international standards in tunneling machine technology. The successful implementation and application of this new construction process based on rolling technology for partial-section hard rock cutting underground will play a positive role in improving the level of mechanization in my country's tunneling, shortening the well construction cycle, reducing construction costs, improving construction conditions, increasing labor productivity, and alleviating the imbalance between mining and tunneling ratios. It will also play a positive role in the transformation of my country's coal mines towards high-yield, high-efficiency, intensive, and safe production, and is of great significance to promoting the sustainable development of my country's coal production. On the other hand, it also provides an alternative construction method for tunnel construction in my country, and plays a positive role in promoting the technological improvement of civil engineering tunnels in my country.

[0080] Example 2

[0081] This embodiment proposes a tunneling machine, including a hard rock cutting head and a transverse double-support disc drive device 100 for hard rock cutting heads disclosed in Embodiment 1. The hard rock cutting head is fitted around the outer periphery of the drive disc 6 and can be fixed by bolts or other structures.

[0082] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A transverse double-support disc-shaped drive device suitable for hard rock cutting discs, characterized in that, include: Low-speed, high-torque motor; The motor housing is in the shape of a concave disc, and the low-speed, high-torque motor is embedded in the concave hole of the motor housing; A planetary gear assembly includes a support frame, a sun gear, a drive gear, and multiple planetary gears. The support frame is located on the side of the motor mount opposite to the recess and is coaxially connected to the motor mount. A non-circular mounting base is formed by the center of the support frame protruding towards the side opposite to the motor mount. The sun gear and multiple planetary gears are located between the support frame and the motor mount. The sun gear is coaxial with the support frame, and the multiple planetary gears are evenly distributed on the outer periphery of the sun gear and all mesh with the sun gear. Any one of the planetary gears is rotatably connected to the support frame. The drive gear is sleeved on the outer periphery of all the planetary gears and meshes with any one of the planetary gears. The main drive shaft has its first end connected to the output end of the low-speed, high-torque motor, and its second end passing through the center of the motor housing and the sun gear, and connected to the sun gear. A drive disc is rotatably mounted on the outer periphery of the motor base and connected to the drive wheel; the outer periphery of the drive disc is used to mount a hard rock cutting disc.

2. The transverse double-support disc-shaped drive device for hard rock cutting discs according to claim 1, characterized in that, Three rows of roller bearings are provided between the drive disk and the motor base. The inner ring of the three rows of roller bearings is connected to the motor base, and the outer ring of the three rows of roller bearings is connected to the drive disk.

3. The transverse double-support disc-shaped drive device for hard rock cutting discs according to claim 2, characterized in that, The inner ring of the drive disk has a support ring that protrudes radially inward from the center. The inner ring of the support ring extends axially toward the support frame to form an axially extended ring segment. A skeleton oil seal is provided between the inner ring of the axially extended ring segment and the outer ring of the motor base. The support ring divides the annular gap between the inner ring of the drive disk and the outer ring of the motor base into mutually isolated bearing cavities and gear cavities along the axial direction. The three-row roller bearing is located in the bearing cavity, and the sun gear, the drive gear, and the planet gear are located in the gear cavity.

4. The transverse double-support disc-shaped drive device for hard rock cutting discs according to claim 3, characterized in that, The drive disk is provided with a first end cap at one end facing the low-speed, high-torque motor. A skeleton oil seal is provided between the outer periphery of the opening of the recess of the motor seat and the inner ring of the drive disk, and the skeleton oil seal abuts against the first end cap. The drive disk, the support ring and the motor seat form a closed bearing cavity. The opening edge of the recess of the motor seat is also provided with a first lubricating oil inlet hole communicating with the bearing cavity. A second end cap is provided at the end of the drive disk opposite to the low-speed, high-torque motor. The inner ring of the second end cap is movably fitted with the support frame, and a dustproof ring and a floating seal are provided between the inner ring of the second end cap and the support frame. The drive disk, the support ring, the motor seat, the support frame, and the second end cap form a closed gear cavity. A second lubricating oil inlet hole communicating with the gear cavity is also provided on the drive disk.

5. The transverse double-support disc-shaped drive device for hard rock cutting discs according to claim 4, characterized in that, It also includes a lubricating oil cooling system located on the outside of the support frame. The lubricating oil cooling system includes an oil extraction pipe, a hydraulic pump, a cooler, and an oil injection pipe connected in sequence. The hydraulic pump is connected to a motor. The oil extraction pipe and the oil injection pipe both pass through the support frame and communicate with the gear cavity. The oil extraction pipe and the oil injection pipe are located at different positions in the gear cavity.

6. The transverse double-support disc-shaped drive device for hard rock cutting discs according to any one of claims 1 to 5, characterized in that, The motor base has a plurality of arc-shaped positioning grooves evenly distributed along the circumference at one end facing the support frame; the support frame has a plurality of arc-shaped positioning protrusions that are adapted to and correspond one-to-one with the arc-shaped positioning grooves at one end facing the motor base. The support frame has a plurality of fixed pins evenly arranged on the outer periphery of the sun gear. The fixed pins and the arc-shaped positioning protrusions are staggered in the circumferential direction. Each fixed pin is equipped with a planetary gear, and each planetary gear is connected to the corresponding fixed pin with a self-aligning bearing. The end of the motor seat facing the support frame is also provided with positioning recesses that are adapted to and correspond to the fixed pins.

7. The transverse double-support disc drive device for hard rock cutting discs according to any one of claims 1 to 5, characterized in that, The drive disk has several grooves along its circumferential direction on its outer periphery.

8. The transverse double-support disc-shaped drive device for hard rock cutting discs according to any one of claims 1 to 5, characterized in that, A cylindrical roller bearing is also provided between the motor base and the main drive shaft. The inner retaining ring of the cylindrical roller bearing is sleeved on the main drive shaft, and the outer retaining ring of the cylindrical roller bearing is connected to the motor base.

9. The transverse double-support disc drive device for hard rock cutting discs according to any one of claims 1 to 5, characterized in that, A tapered roller bearing is also provided between the second end of the main drive shaft and the inner ring of the support frame, and an inner end cap for fixing the inner ring of the tapered roller bearing is provided at the second end of the main drive shaft. The support frame has a bearing outer end cap for fixing the outer ring of the tapered roller bearing at one end away from the motor seat. An observation hole is provided in the center of the bearing outer end cap, and a sealing ring is provided between the bearing outer end cap and the support frame.

10. A tunneling machine, characterized in that, The device includes a hard rock cutting disc and a transverse double-support disc-shaped drive device for a hard rock cutting disc as described in any one of claims 1 to 9, wherein the hard rock cutting disc is fitted around the outer periphery of the drive disc.

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