Asphalt ship stern shaft monitoring structure

Abstract

The invention discloses an asphalt ship stern shaft monitoring structure, and relates to the technical field of asphalt ship stern shaft monitoring, the asphalt ship stern shaft monitoring structure comprises an asphalt ship body, a stern body and an asphalt ship stern shaft body, the asphalt ship body is internally provided with a driving cavity, and the asphalt ship body and the stern body are internally provided with maintenance cavities; the asphalt stern shaft monitoring device has the beneficial effects that a reciprocating screw rod in a driving box rotates to drive a sleeve block to move through a thread, so that a mounting ring is driven to move on the outer side of the asphalt stern shaft body, and meanwhile, the asphalt stern shaft body can be monitored through a monitoring camera; the first gear is meshed with the gear ring and then drives the rotary drum to rotate in the mounting ring, so that the monitoring camera can monitor the outer side of the asphalt stern shaft body by 360 degrees, the situation that inspection dead angles exist is avoided, personnel do not need to enter inspection, the specific situation of the asphalt stern shaft body can be observed through a terminal, and therefore the inspection efficiency is effectively improved.

Description

Technical Field

[0001] This invention relates to the field of asphalt ship stern shaft monitoring technology, specifically to an asphalt ship stern shaft monitoring structure. Background Technology

[0002] The stern shaft is a crucial component of a ship's propulsion shafting system. It houses the propeller at its stern and connects to other shafting transmission equipment within the ship's hull via a coupling at its bow, transmitting main engine torque and propeller thrust. The stern shaft is mostly located overboard and supported by a water-lubricated stern shaft bearing, also located overboard. Due to the imbalance of rotating components and the rotor dynamics of the concentrated mass-cantilever beam system formed by the propeller and stern shaft, the propulsion shafting system generates gyroscopic (lateral) vibrations during operation. The stern end of the overboard stern shaft experiences one of the largest vibration amplitudes. These gyroscopic vibrations are transmitted to the hull structure through the shafting system and stern shaft bearing, inducing vibrational sound radiation from the stern hull structure. Furthermore, the stern shaft bearings supporting the outboard stern shaft operate under harsh conditions. Lubricated and cooled by seawater, they endure heavy loads, friction, and vibration impacts. They are also susceptible to intrusion from foreign objects such as silt, marine life, and fishing nets, making them highly prone to abnormal and rapid wear. This can lead to stern shaft sinking, altering the load distribution characteristics of the shafting system and the operating conditions of the stern shaft bearings, ultimately negatively impacting the safe operation and long-term reliability of the propulsion shafting. Therefore, regular inspection and monitoring of the ship's outboard stern shaft is essential. Currently, on existing 17,000-ton asphalt ship, there is a large horizontal plate structure near the end of the bulkhead connecting the stern to the engine room. The original design height of this horizontal plate was 4100mm from the baseline, but the height of the main engine shaft on this ship is 2800mm from the baseline. Since important equipment such as the stern shaft and sealing oil tanks are located here and require frequent inspection, the height of the steel plate platform at the bottom of the engine room is 3200mm from the baseline. Furthermore, due to the rib structure, the distance between the steel plate platform and the rib structure is only 400mm, resulting in limited space and making it difficult and inconvenient for personnel to inspect the equipment. Therefore, we have proposed a stern shaft monitoring structure for asphalt ships. Summary of the Invention

[0003] To address the shortcomings of existing technologies, this invention provides a monitoring structure for the stern shaft of an asphalt boat, which solves the problem mentioned in the background art of the small space at the stern of an asphalt boat, making it difficult and inconvenient for personnel to inspect and maintain the equipment.

[0004] To achieve the above objectives, the present invention provides the following technical solution: an asphalt boat stern shaft monitoring structure, comprising an asphalt boat hull, a stern body, and an asphalt boat stern shaft body. The hull contains a drive chamber, and both the hull and stern body contain inspection chambers. Drive boxes are fixedly installed on both sides of each inspection chamber. A mounting ring is located in the middle of the two drive boxes, outside the asphalt boat stern shaft body. A rotating cylinder is rotatably mounted inside the mounting ring. Two mounting seats are fixedly installed on the inner side of the rotating cylinder. A monitoring camera is mounted on the top of each mounting seat and engages with the asphalt boat stern shaft body. Limiting rings are fixedly installed on the outer sides of both ends of the rotating cylinder. A gear ring is fixedly installed on the outer side of one of the limiting rings. A first motor is fixedly installed on the top of the mounting ring. A first gear is fixedly installed at the output end of the first motor and engages with the gear ring.

[0005] Furthermore, the drive box has a sliding groove inside, and a reciprocating lead screw is rotatably installed inside the sliding groove. A sleeve block is threaded onto the outer side of the reciprocating lead screw. Connecting blocks are fixedly installed on both sides of the mounting ring. An mounting shaft is rotatably installed on the top of the connecting blocks. A take-up roller is fixedly installed at one end of the mounting shaft. A power data transmission line is wound around the outer side of the take-up roller. A control box is set inside the drive cavity. One end of the power data transmission line is electrically connected to the control box. A connecting plate is fixedly installed on one side of the mounting ring. A rotary joint is fixedly installed inside the connecting plate. The rotary joint is rotatably connected to the take-up roller. The other end of the power data transmission line is electrically connected to the input end of the rotary joint.

[0006] Furthermore, a second gear is fixedly mounted on the outer side of the mounting shaft, and a rack is fixedly mounted on the top of the drive box, with the second gear meshing with the rack.

[0007] Furthermore, the connecting block is fixedly connected to the sleeve block, one end of the reciprocating screw extends to the outside of the drive box and is fixedly installed with a driven bevel gear, the inner wall of the drive cavity is fixedly installed with a second motor, the output end of the second motor is fixedly installed with a driving bevel gear, and the driving bevel gear meshes with the driven bevel gear.

[0008] Furthermore, the mounting ring has a rotating groove inside, and a sliding ring is fixedly installed on the outside of the rotating cylinder, with the sliding ring cooperating with the rotating groove.

[0009] Furthermore, the mounting ring has several rolling grooves inside the rotating groove, and each of the rolling grooves has a ball bearing that is rolled inside it, and the sliding ring cooperates with the ball bearing.

[0010] Furthermore, the top of the mounting base is provided with several lighting lamps.

[0011] Furthermore, two limiting guide rods are fixedly installed inside the slide groove, and the sleeve block is slidably connected to the limiting guide rods.

[0012] Furthermore, a speed reducer is installed inside the drive cavity, and the output end of the speed reducer is fixedly connected to one end of the asphalt stern shaft body. The other end of the asphalt stern shaft body extends to the outside of the stern and is equipped with a propeller. A shaft frame is installed inside the drive cavity and on one side of the speed reducer, and the asphalt stern shaft body is rotatably connected to the shaft frame.

[0013] Furthermore, the drive chamber is equipped with a stern tube lubricating oil circulation device.

[0014] This invention provides a monitoring structure for asphalt ship stern shafts, which has the following beneficial effects: 1. This asphalt stern shaft monitoring structure, through the configuration of a drive box, mounting ring, rotating cylinder, mounting base, monitoring camera, limit ring, gear ring, first motor, and first gear, allows the reciprocating screw inside the drive box to rotate, thereby driving the sleeve block to move through the thread, which in turn moves the mounting ring on the outside of the asphalt stern shaft body. Simultaneously, the monitoring camera can monitor the asphalt stern shaft body. By activating the first motor to drive the first gear to rotate, the first gear meshes with the gear ring, driving the rotating cylinder to rotate within the mounting ring. This allows the monitoring camera to provide 360° monitoring of the outside of the asphalt stern shaft body, avoiding blind spots during inspections. No personnel are required for inspection; the specific condition of the asphalt stern shaft body can be viewed through a terminal, effectively improving inspection efficiency.

[0015] 2. This asphalt stern shaft monitoring structure, through the arrangement of an installation shaft, a take-up roller, a power data transmission line, a control box, a connecting plate, a rotary joint, a second gear, and a rack, uses a reciprocating screw to rotate a sleeve block that moves along a thread. Simultaneously, the connecting block moves with the sleeve block. During the movement of the connecting block, the second gear meshes with the rack, driving the installation shaft and the take-up roller to rotate. The take-up roller unwinds the power data transmission line wound around its outer side, extending its length. This ensures that the power data transmission line transmits the monitoring signal from the surveillance camera to the control box. Similarly, when the sleeve block moves back along the thread, the second gear meshes with the rack, causing the installation shaft to reverse. The take-up roller then winds up the power data transmission line, preventing it from scattering and causing friction that could affect its service life. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a side view of the present invention; Figure 3 This is a schematic diagram of the mounting ring of the present invention; Figure 4 This is a schematic diagram of the surveillance camera of the present invention; Figure 5 This is a schematic diagram of the driver box of the present invention; Figure 6 This is a schematic diagram of the power data transmission line connection structure of the present invention; Figure 7 This is a schematic diagram of the second gear and rack of the present invention. Figure 8 This is a cross-sectional view of the mounting ring of the present invention; Figure 9 For the present invention Figure 5 Enlarged view of point A in the image; Figure 10 For the present invention Figure 8 Enlarged view of point B in the image.

[0017] In the diagram: 1. Asphalt boat hull; 2. Stern hull; 3. Drive chamber; 4. Inspection chamber; 5. Asphalt boat stern shaft body; 6. Drive box; 7. Mounting ring; 8. Rotary drum; 9. Mounting base; 10. Monitoring camera; 11. Lighting lamp; 12. Limiting ring; 13. Gear ring; 14. First motor; 15. First gear; 16. Slide groove; 17. Reciprocating lead screw; 18. Sleeve block; 19. Connecting block; 20. Driven bevel gear ; 21. Second motor; 22. Drive bevel gear; 23. Mounting shaft; 24. Take-up roller; 25. Power data transmission line; 26. Control box; 27. Connecting plate; 28. Rotary joint; 29. ​​Second gear; 30. Rack; 31. Rotary groove; 32. Sliding ring; 33. Roller groove; 34. Ball bearing; 35. Reducer; 36. Propeller; 37. Shaft bracket; 38. Stern tube lubricating oil circulation device; 39. Limiting guide rod. Detailed Implementation

[0018] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0019] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention. Furthermore, the technical features involved in the various embodiments of this invention described below can be combined with each other as long as they do not conflict with each other.

[0020] It should be noted that, depending on the implementation needs, the various steps / components described in this application can be broken down into more steps / components, or two or more steps / components or parts of the operation of steps / components can be combined into new steps / components to achieve the purpose of this invention.

[0021] Example 1 Please see Figures 1 to 10 This invention provides a technical solution: an asphalt boat stern shaft monitoring structure, including an asphalt boat hull 1, a stern body 2, and an asphalt boat stern shaft body 5. The asphalt boat hull 1 has a drive chamber 3 inside, and both the hull 1 and stern body 2 have inspection chambers 4 inside. Drive boxes 6 are fixedly installed on both sides of the inspection chambers 4. A mounting ring 7 is located in the middle of the two drive boxes 6, outside the asphalt boat stern shaft body 5. A rotating cylinder 8 is rotatably mounted inside the mounting ring 7. Two mounting seats 9 are fixedly installed on the inner side of the rotating cylinder 8. A monitoring camera 10 is mounted on the top of the mounting seats 9, and the monitoring camera 10 cooperates with the asphalt boat stern shaft body 5. Limiting rings 12 are fixedly installed on the outer sides of both ends of the rotating cylinder 8. A gear ring 13 is fixedly installed on the outer side of one limiting ring 12. A first motor 14 is fixedly installed on the top of the mounting ring 7. A first gear 15 is fixedly installed at the output end, and the first gear 15 meshes with the gear ring 13. It is installed on the outside of the asphalt stern shaft body 5 through the mounting ring 7 and the rotating drum 8. The monitoring camera 10 can monitor the asphalt stern shaft body 5 in real time, so that the inspection personnel do not need to enter the drive cavity 3 and maintenance cavity 4 inside the stern body 2 for inspection or maintenance. During the maintenance process, after the first motor 14 drives the first gear 15 to rotate, the first gear 15 meshes with the gear ring 13, which can drive the limit ring 12 and the rotating drum 8 to rotate. After the rotating drum 8 rotates inside the mounting ring 7, it can drive the two monitoring cameras 10 to monitor the outside of the asphalt stern shaft body 5 in real time, which makes it easier for the inspection personnel to understand the specific situation on the outside of the asphalt stern shaft body 5. The maintenance personnel can conduct inspections intuitively at the monitoring terminal, which is more convenient and faster.

[0022] In this embodiment, further, a sliding groove 16 is provided inside the drive box 6, and a reciprocating lead screw 17 is rotatably installed inside the sliding groove 16. A sleeve block 18 is threaded on the outer side of the reciprocating lead screw 17. Connecting blocks 19 are fixedly installed on both sides of the mounting ring 7. A mounting shaft 23 is rotatably installed on the top of the connecting block 19. A take-up roller 24 is fixedly installed at one end of the mounting shaft 23. A power data transmission line 25 is wound around the outer side of the take-up roller 24. A control box 26 is provided inside the drive cavity 3. One end of the power data transmission line 25 is electrically connected to the control box 26. A connecting plate 27 is fixedly installed on one side of the mounting ring 7. A rotary joint 28 is fixedly installed inside the device. The rotary joint 28 is rotatably connected to the take-up roller 24. The other end of the power data transmission line 25 is electrically connected to the input end of the rotary joint 28. The connection end of the rotary joint 28 is electrically connected to the monitoring camera 10, the lighting lamp 11, and the first motor 14, respectively. It can supply power to the monitoring camera 10, the lighting lamp 11, and the first motor 14, and can also be used to transmit the monitoring images from the monitoring camera 10 and the control signals sent by the control box 26. The sleeve 18 has a hole inside that mates with the reciprocating lead screw 17. The reciprocating lead screw 17 rotates... Then, the sleeve 18 can be driven to reciprocate through the threaded groove on its outer side. This allows the connecting block 19 and the mounting ring 7 to move to different positions outside the asphalt stern shaft body 5 for monitoring, further improving the comprehensiveness of monitoring the asphalt stern shaft body 5 and avoiding blind spots. When the sleeve 18 reciprocates outside the reciprocating screw 17, the second gear 29 meshes with the rack 30 on the top of the drive box 6, thereby driving the mounting shaft 23 and the winding roller 24 to rotate. When the sleeve 18 moves inward to one side of the drive box 6, the winding roller 24 rotates clockwise, thus controlling the power data transmission line 25. The extension provides length for the movement of the sleeve block 18. When the sleeve block 18 moves to the other side of the drive box 6 to reset, the second gear 29 meshes with the rack 30 and drives the mounting shaft 23 and the winding roller 24 to reverse. This allows the power data transmission line 25 to be wound and wound up by the winding roller 24, preventing accidental damage to the power data transmission line 25. It also improves the service life of the power data transmission line 25 and the stability of power supply and control signals to the monitoring camera 10, the lighting lamp 11 and the first motor 14. It also improves the stability of the monitoring signals emitted by the monitoring camera 10 during monitoring.

[0023] In this embodiment, a second gear 29 is fixedly installed on the outer side of the mounting shaft 23, and a rack 30 is fixedly installed on the top of the drive box 6. The second gear 29 meshes with the rack 30. By meshing the second gear 29 with the rack 30 on the top of the drive box 6, when the sleeve block 18 moves outside the reciprocating screw 17, it can drive the mounting shaft 23 and the take-up roller 24 to rotate, thereby realizing the winding and unwinding of the power data transmission line 25.

[0024] In this embodiment, the connecting block 19 is fixedly connected to the sleeve block 18. One end of the reciprocating screw 17 extends to the outside of the drive box 6 and is fixedly installed with a driven bevel gear 20. The inner wall of the drive cavity 3 is fixedly installed with a second motor 21. The output end of the second motor 21 is fixedly installed with a driving bevel gear 22, which meshes with the driven bevel gear 20. After the second motor 21 is turned on to drive the driving bevel gear 22 to rotate, the reciprocating screw 17 can be driven to rotate through the meshing of the driving bevel gear 22 and the driven bevel gear 20. Then, the sleeve block 18 can be driven to move back and forth on its outside through the reciprocating screw 17. The connecting block 19 and the mounting ring 7 can be moved to different positions on the outside of the asphalt stern shaft body 5 for monitoring through the sleeve block 18.

[0025] In this embodiment, the mounting ring 7 is further provided with a rotating groove 31 inside, and a sliding ring 32 is fixedly installed on the outside of the rotating cylinder 8. The sliding ring 32 cooperates with the rotating groove 31. When the rotating cylinder 8 is driven by the first motor 14 to rotate the first gear 15, and the first gear 15 meshes with the gear ring 13 to drive the rotating cylinder 8 to rotate inside the mounting ring 7, the sliding ring 32 rotates in the rotating groove 31, which can improve the rotational stability of the rotating cylinder 8.

[0026] In this embodiment, further, a plurality of rolling grooves 33 are provided inside the mounting ring 7 and inside the rotating groove 31. Rolling balls 34 are rolled inside each of the rolling grooves 33, and the sliding ring 32 cooperates with the rolling balls 34. Through the arrangement of the rolling grooves 33 and the rolling balls 34, when the sliding ring 32 rotates in the rotating groove 31, the rolling balls 34 contact the sliding ring 32, thereby improving the smoothness of the sliding ring 32 when rotating in the rotating groove 31.

[0027] In this embodiment, the top of the mounting base 9 is further provided with several lighting lamps 11; by setting the lighting lamps 11, when the monitoring camera 10 monitors the outside of the asphalt stern shaft body 5, the monitored part can be illuminated to ensure the brightness of the monitored image.

[0028] In this embodiment, two limiting guide rods 39 are further fixedly installed inside the slide groove 16, and the sleeve block 18 is slidably connected to the limiting guide rods 39. By setting the limiting guide rods 39, when the reciprocating screw 17 rotates and drives the sleeve block 18 to move through the thread, the limiting guide rods 39 can guide and limit the sleeve block 18, so as to avoid the reciprocating screw 17 rotating and driving the sleeve block 18 to rotate together, thus preventing the transmission from failing, and improving the stability of the sleeve block 18 when it is driven.

[0029] Example 2 Please see Figure 1 , Figure 2This invention provides a technical solution in which a reducer 35 is installed inside the drive cavity 3. The output end of the reducer 35 is fixedly connected to one end of the asphalt boat stern shaft body 5. The other end of the asphalt boat stern shaft body 5 extends to the outside of the stern hull 2 ​​and is equipped with a propeller 36. A shaft bracket 37 is installed inside the drive cavity 3 and on one side of the reducer 35. The asphalt boat stern shaft body 5 is rotatably connected to the shaft bracket 37. The input end of the reducer 35 is connected to the output end of the engine inside the asphalt boat. When the engine output end rotates, it drives the output end of the reducer 35 to rotate. Thus, the output end of the reducer 35 drives the asphalt boat stern shaft body 5 and the propeller 36 to rotate, providing power to the asphalt boat. The shaft bracket 37 can improve the stability of the asphalt boat stern shaft body 5 when it is driven to rotate by the engine.

[0030] In this embodiment, the drive cavity 3 is further provided with a stern tube lubricating oil circulation device 38; the stern tube lubricating oil circulation device 38 serves as a lubrication device in existing asphalt boats, and can lubricate the rotation of the stern shaft body 5 of the asphalt boat.

[0031] In summary, this asphalt stern shaft monitoring structure, when in use, drives the active bevel gear 22 to rotate by activating the second motor 21. The active bevel gear 22 meshes with the driven bevel gear 20, driving the reciprocating screw 17 to rotate. The reciprocating screw 17 then moves the sleeve block 18 to its outer side. The sleeve block 18, through the connecting block 19, moves the mounting ring 7 and the rotating cylinder 8 to the outer side of the asphalt stern shaft body 5. Real-time monitoring of the asphalt stern shaft body 5 can then be achieved through the monitoring camera 10. The monitoring signal is transmitted to the rotary joint 28 via the connecting cable and then to the control box 26 via the power data transmission line 25. The control box 26 then transmits the monitoring image to the monitoring system. With the control terminal, inspectors can monitor remotely without having to enter the drive chamber 3 and maintenance chamber 4 inside the stern hull 2 ​​for inspection or maintenance. During maintenance, the first motor 14 drives the first gear 15 to rotate, and the first gear 15 meshes with the gear ring 13, which in turn drives the limit ring 12 and the rotating drum 8 to rotate. After the rotating drum 8 rotates inside the mounting ring 7, it drives the two monitoring cameras 10 to monitor the outside of the asphalt stern shaft body 5 in real time, making it easier for inspectors to understand the specific situation outside the asphalt stern shaft body 5. This solves the problem of the small space at the stern of the asphalt boat, which makes it difficult and inconvenient for personnel to maintain the equipment, and improves inspection efficiency. When the sleeve 18 reciprocates outside the reciprocating screw 17, the second gear 29 meshes with the rack 30 on the top of the drive box 6, thereby driving the mounting shaft 23 and the take-up roller 24 to rotate. When the sleeve 18 moves to one side inside the drive box 6, the take-up roller 24 rotates clockwise, thereby lengthening the power data transmission line 25 to provide length for the movement distance of the sleeve 18. When the sleeve 18 moves to the other side inside the drive box 6 to reset, the second gear 29 meshes with the rack 30 and drives the mounting shaft 23 and the take-up roller 24 to reverse, so that the power data transmission line 25 can be wound and wound up by the take-up roller 24, avoiding the accidental damage to the power data transmission line 25.

[0032] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A monitoring structure for an asphalt stern shaft, comprising an asphalt hull (1), a stern body (2), and an asphalt stern shaft body (5), characterized in that: The interior of the asphalt boat hull (1) is provided with a drive chamber (3). The interior of both the asphalt boat hull (1) and the stern hull (2) is provided with a maintenance chamber (4). Both sides of the maintenance chamber (4) are fixedly installed with drive boxes (6). The middle of the two drive boxes (6) and the outer side of the asphalt boat stern shaft body (5) is provided with an installation ring (7). The inside of the installation ring (7) is rotatably installed with a rotating cylinder (8). The inner side of the rotating cylinder (8) is fixedly installed with two mounting seats (9). The top of the mounting seat (9) is provided with a monitoring camera (10). The monitoring camera (10) cooperates with the asphalt boat stern shaft body (5). The outer sides of both ends of the rotating cylinder (8) are fixedly installed with limit rings (12). The outer side of one of the limit rings (12) is fixedly installed with a gear ring (13). The top of the installation ring (7) is fixedly installed with a first motor (14). The output end of the first motor (14) is fixedly installed with a first gear (15). The first gear (15) cooperates with the gear ring (13).

2. The asphalt stern shaft monitoring structure according to claim 1, characterized in that: The drive box (6) has a sliding groove (16) inside, and a reciprocating screw (17) is rotatably installed inside the sliding groove (16). A sleeve block (18) is threaded on the outside of the reciprocating screw (17). Connecting blocks (19) are fixedly installed on both sides of the mounting ring (7). A mounting shaft (23) is rotatably installed on the top of the connecting block (19). A take-up roller (24) is fixedly installed at one end of the mounting shaft (23). A power data transmission line (25) is wound around the outside of the take-up roller (24). A control box (26) is set inside the drive cavity (3). One end of the power data transmission line (25) is electrically connected to the control box (26). A connecting plate (27) is fixedly installed on one side of the mounting ring (7). A rotary joint (28) is fixedly installed inside the connecting plate (27). The rotary joint (28) is rotatably connected to the take-up roller (24). The other end of the power data transmission line (25) is electrically connected to the input end of the rotary joint (28).

3. The asphalt stern shaft monitoring structure according to claim 2, characterized in that: A second gear (29) is fixedly installed on the outside of the mounting shaft (23), and a rack (30) is fixedly installed on the top of the drive box (6). The second gear (29) meshes with the rack (30).

4. The asphalt stern shaft monitoring structure according to claim 2, characterized in that: The connecting block (19) is fixedly connected to the sleeve block (18). One end of the reciprocating screw (17) extends to the outside of the drive box (6) and is fixedly installed with a driven bevel gear (20). The inner wall of the drive cavity (3) is fixedly installed with a second motor (21). The output end of the second motor (21) is fixedly installed with a driving bevel gear (22). The driving bevel gear (22) meshes with the driven bevel gear (20).

5. The asphalt stern shaft monitoring structure according to claim 1, characterized in that: The mounting ring (7) has a rotating groove (31) inside, and a sliding ring (32) is fixedly installed on the outside of the rotating cylinder (8). The sliding ring (32) cooperates with the rotating groove (31).

6. The asphalt stern shaft monitoring structure according to claim 5, characterized in that: The mounting ring (7) has several rolling grooves (33) inside the rotating groove (31), and each of the rolling grooves (33) has a ball (34) rolling inside it. The sliding ring (32) cooperates with the ball (34).

7. The asphalt stern shaft monitoring structure according to claim 1, characterized in that: The top of the mounting base (9) is provided with several lighting lamps (11).

8. The asphalt stern shaft monitoring structure according to claim 2, characterized in that: Two limiting guide rods (39) are fixedly installed inside the slide groove (16), and the sleeve block (18) is slidably connected to the limiting guide rods (39).

9. The asphalt stern shaft monitoring structure according to claim 1, characterized in that: The drive cavity (3) is equipped with a speed reducer (35). The output end of the speed reducer (35) is fixedly connected to one end of the asphalt stern shaft body (5). The other end of the asphalt stern shaft body (5) extends to the outside of the stern body (2) and is equipped with a propeller (36). The drive cavity (3) is equipped with a shaft frame (37) inside and on one side of the speed reducer (35). The asphalt stern shaft body (5) is rotatably connected to the shaft frame (37).

10. The asphalt stern shaft monitoring structure according to claim 1, characterized in that: The drive chamber (3) is equipped with a stern tube lubricating oil circulation device (38).

Images