An adaptive propeller adjustment structure for a tail-mounted underwater thruster

Abstract

The invention relates to an adaptive propeller adjustment structure of a tail-mounted underwater propeller, and relates to the technical field of underwater equipment, which comprises an underwater propeller and a power shaft mounted on the underwater propeller, the power shaft is provided with a plurality of limit slots, and the underwater propeller is provided with a propeller adjustment device; the propeller adjustment device comprises a side ring mounted on one end of the underwater propeller, a main shaft is provided on the power shaft through a plurality of inner limit sleeves, a positioning ring is provided at one end of the main shaft, a plurality of outer blades and inner blades are provided on the main shaft, a regulating mechanism for adjusting the inner blades is provided on the side ring and the main shaft, and a locking member is provided at one end of the power shaft; the invention has the effects of improving propulsion efficiency, automatically adjusting the blades according to different use requirements, and effectively adjusting the load of the propeller to meet different performance requirements and operating conditions.

Description

Technical Field

[0001] The present application relates to the technical field of underwater equipment, and in particular to an adaptive propeller adjustment structure of a tail-mounted underwater thruster. Background Art

[0002] Underwater propulsion is an important device used in underwater vehicles (such as submarines, unmanned underwater vehicles, submersibles, etc.). Its main function is to provide propulsion so that the vehicle can move in the water. The most common method is to use a rotating propeller to generate propulsion in the water. Different working conditions (such as water flow speed, depth, temperature, etc.) will affect the performance of the propeller. In different navigation modes (such as fast navigation, fine operation, etc.), the propeller needs to switch to different states. In order to improve propulsion efficiency and controllability, and maintain excellent performance under various environmental conditions, the adjustability of the propeller is particularly important.

[0003] For example, in the existing Chinese patent with publication number CN114455046A, a marine propeller with adjustable pitch angle is disclosed. Through the above prior art, the adjustment key with different relative angles between the key seat and the key body is replaced, the installation angle of the blade base is changed, and the pitch angle of the blade is adjusted. The purpose of adjusting the propeller load is achieved by manually disassembling and adjusting the pitch angle of the blade.

[0004] However, the above prior art has the following technical defects:

[0005] When the device is used to adjust the propeller load as needed, the screws fixing the blades are first unscrewed, all blades on the hub are removed, the original adjustment key is removed, and the adjustment key with a suitable relative angle between the key seat and the key body is replaced; then the blade base is inserted into the installation slot, and the removed screws are used to fix the blades on the hub to complete the adjustment of the propeller pitch angle and achieve the purpose of adjusting the propeller load. The above-mentioned prior art adjusts the propeller load by adjusting the pitch angle of the blades, and it needs to be done manually. The staff needs to remove the hub from the ship as a whole or dive underwater to adjust the pitch angle of the propeller, and the screws need to be unscrewed one by one to replace and install the blades. The operation is cumbersome and takes a long time to adjust, which is extremely inconvenient.

[0006] Secondly, since the propeller blades are replaced manually one by one and fixed with screws, and a large number of screws are required, it is easy for a screw to be not tightened during the removal and screwing process, which may cause the propeller blades to loosen during high-speed rotation, posing a safety hazard.

[0007] Based on this, on the basis of the existing marine propeller with adjustable pitch angle, in order to overcome the above-mentioned technical defects, there is still room for improvement. Summary of the invention

[0008] In order to improve propulsion efficiency, the blades are automatically adjusted according to different usage requirements, which can effectively adjust the propeller load to meet different performance requirements and operating conditions. The present application provides an adaptive propeller adjustment structure for a tail-mounted underwater thruster.

[0009] The present application provides an adaptive propeller adjustment structure for a tail-mounted underwater thruster, which adopts the following technical solution:

[0010] An adaptive propeller adjustment structure of a tail-mounted underwater propeller, comprising an underwater propeller and a power shaft mounted on the underwater propeller, the power shaft having a plurality of limit slots, and the underwater propeller being provided with a propeller adjustment device;

[0011] The propeller adjustment device comprises a side ring installed at one end of the underwater propeller, a main shaft is provided on the power shaft through a plurality of inner limit sleeves, a positioning ring is provided at one end of the main shaft, and an annular groove adapted to the positioning ring is provided on one side of the side ring;

[0012] A plurality of outer blades and inner blades are arranged on the main shaft, a regulating mechanism for adjusting the inner blades is arranged on the side ring and the main shaft, and a locking member is arranged at one end of the power shaft.

[0013] Preferably, the regulating mechanism comprises two limit drive rings slidably sleeved on the main shaft, and the two limit drive rings are located between the inner blade and the positioning ring, a plurality of T-shaped clamping blocks are equidistantly arranged between the two limit drive rings, and a plurality of limit side grooves for the plurality of T-shaped clamping blocks to be installed and slidably are provided on the main shaft;

[0014] A linkage control assembly connected to the inner blade is provided on the main shaft between the two limit drive rings, and a drive unit for driving the two limit drive rings is provided on the side ring and the main shaft.

[0015] Preferably, the joint control component includes a plurality of assembly supports respectively installed on the side of the plurality of inner blades facing the limit drive ring, a connecting end block is clamped on the assembly support, an inner connecting rod is provided on one side of the connecting end block, and the inner connecting rod is located between the two limit drive rings.

[0016] Preferably, an outer sleeve shaft that interferes with the two limit drive rings is rotatably sleeved on the inner connecting rod, an end ball is installed at one end of the inner connecting rod away from the connecting end block, and a limiting groove is obliquely opened on the main shaft for the end ball to limit the sliding movement.

[0017] Preferably, a limiting rod is arranged in the limiting slide groove on the main body shaft, and a magnet having an attractive force on the end-mounted round ball is installed at one end of the limiting rod facing the inner blade.

[0018] Preferably, the driving unit includes a bidirectional threaded rod that is threaded through one of the T-shaped clamping blocks and rotatably arranged in the limiting side groove, the T-shaped clamping block is provided with an internal threaded hole that is adapted to the bidirectional threaded rod, the bidirectional threaded rod is sleeved with a ratchet gear, and the main shaft is provided with a rotating wheel groove for installing the ratchet gear at the limiting side groove.

[0019] Preferably, a ring gear is mounted on the side ring facing the limit driving ring through a plurality of external clamping blocks for limiting rotation, and the ring gear is meshed with the ratchet gear, and the external clamping blocks are provided with control grooves adapted to the ring gear.

[0020] Preferably, a waterproof motor is embedded in the side ring, an inner groove for installing the waterproof motor is opened on the side ring, a driving gear meshing with the ring gear is sleeved on the rotating shaft of the waterproof motor, and the outer side of the ring gear has a tooth groove adapted to the driving gear.

[0021] Preferably, the locking member comprises a locking cover rotatably mounted on one end of the power shaft by means of a bolt, and one end of the power shaft has an internal threaded locking hole adapted to the bolt.

[0022] Preferably, the underwater propeller is provided with a guard frame covering the outer blades and the inner blades.

[0023] In summary, the present application includes at least one of the following beneficial technical effects:

[0024] 1. The main shaft sleeve is arranged on the power shaft, and multiple inner strips are respectively inserted into the corresponding limit slots. When the underwater propeller is started to drive the power shaft to rotate, the main shaft can be driven to rotate synchronously. The locking member can lock the position of the main shaft to prevent the main shaft from sliding on the power shaft and detaching from the power shaft during rotation.

[0025] 2. The operation of the waterproof motor can drive the ratchet gear and the bidirectional threaded rod to rotate through the transmission of the driving gear and the ring gear, so that the two limit drive rings can be driven in cooperation with the internal threaded holes opened on the T-shaped clamp block, so that the two limit drive rings slide on the main shaft, and under the action of the joint control component, the inner blades are driven to separate from the outer blades and the inner blades are driven to rotate a certain angle to adjust to a multi-blade shape, providing a more stable thrust during rotation and better dispersing the load.

[0026] 3. The two limit drive rings are driven to slide on the main shaft. When the end ball slides in the limiting groove to the end of the limit rod, the magnet arranged at the end of the limit rod can attract the end ball to lock it, thereby achieving the effect of locking the position of the inner blade, further improving the stability of the inner blade during rotation. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is an overall schematic diagram of the present invention.

[0028] Figure 2 It is a schematic diagram of the power shaft and the guard frame of the present invention.

[0029] Figure 3 It is a schematic diagram of a propeller adjusting device of the present invention.

[0030] Figure 4 It is an exploded cross-sectional view of some components of the propeller adjusting device of the present invention.

[0031] Figure 5 It is a schematic diagram of the control mechanism of the present invention.

[0032] Figure 6 It is an exploded view of some components of the regulating mechanism of the present invention.

[0033] Figure 7 It is a cross-sectional view of the joint control assembly of the present invention.

[0034] Figure 8 The present invention Figure 7 A magnified image of area A.

[0035] Fig. 9 It is an exploded view of the joint control assembly of the present invention.

[0036] Fig.10 It is a schematic diagram of the limiting rod and the magnet of the present invention.

[0037] Fig.11 The driving unit of the present invention is schematically shown in FIG. Figure 1 .

[0038] Fig.12 The driving unit of the present invention is schematically shown in FIG. Figure 2 .

[0039] Fig.13 The driving unit of the present invention is schematically shown in FIG. Figure 3 .

[0040] Fig.14 It is an exploded view of the external clamping block and the ring gear of the present invention.

[0041] Fig.15 It is a schematic diagram of the locking member of the present invention.

[0042] Fig.16 It is a cross-sectional view of the monitoring component of the present invention.

[0043] Fig.17 It is an exploded view of the monitoring component of the present invention.

[0044] Description of the reference numerals: 1. underwater propeller; 11. power shaft; 111. position limiting slot; 2. propeller adjustment device; 21. side ring; 22. inner strip; 23. main shaft; 24. positioning ring; 211. annular groove; 25. outer blade; 26. inner blade; 3. regulating mechanism; 4. locking member; 31. position limiting drive ring; 32. T-shaped clamp block; 231. position limiting side groove; 5. joint control assembly; 6. drive unit; 51. assembly support; 52. connecting end block; 53. inner connecting rod; 54. outer sleeve shaft; 55. end ball; 232 , limiting slide groove; 56, limiting rod; 57, magnet; 61, bidirectional threaded rod; 321, internal threaded hole; 62, ratchet gear; 233, wheel groove; 63, external block; 64, ring gear; 631, control groove; 65, waterproof motor; 212, inner groove; 66, driving gear; 641, tooth groove; 41, bolt; 42, locking cover; 112, internal threaded lock hole; 12, guard frame; 7, monitoring part; 71, T-shaped round rod; 421, built-in round groove; 72, warning light; 73, resistance switch; 74, limiting ring; 75, extension spring. DETAILED DESCRIPTION

[0045] The following is combined with Figure 1-Figure 17 This application is described in further detail.

[0046] An embodiment of the present application discloses an adaptive propeller adjustment structure for a tail-mounted underwater thruster, which can improve propulsion efficiency, automatically adjust the blades according to different usage requirements, and effectively adjust the propeller load to meet different performance requirements and operating conditions.

[0047] Embodiment 1:

[0048] Reference Figure 1 and Figure 2 As shown, the present application provides an adaptive propeller adjustment structure of a tail-mounted underwater propeller, including an underwater propeller 1 and a power shaft 11 installed on the underwater propeller 1, the power shaft 11 is connected to the inside of the underwater propeller 1, and is driven by the underwater propeller 1. When the underwater propeller 1 starts to operate, it can drive the power shaft 11 to rotate; a plurality of limit slots 111 are provided on the power shaft 11, and a propeller adjustment device 2 is provided on the underwater propeller 1; the propeller device can be quickly assembled on the underwater propeller 1 and the power shaft 11, and the number and angle of the blades can be adjusted as needed, which can better disperse the load and improve efficiency.

[0049] Reference Figures 2 to 4As shown, specifically, the propeller adjustment device 2 includes a side ring 21 installed at one end of the underwater propeller 1, the side ring 21 is fixedly installed on one side of the underwater propeller 1, and the power shaft 11 passes through the side ring 21, and the side ring 21 and the power shaft 11 do not contact each other. In this embodiment, the power shaft 11 is preferably provided with a main shaft 23 through seven inner strips 22 limiting sleeves, and the seven inner strips 22 are fixedly installed in the inner wall of the main shaft 23 at equal intervals, and the inner strips 22 are adapted to the limiting slots 111. When the power shaft 11 is driven by the underwater propeller 1 to rotate, it will synchronously drive the main shaft 23 to rotate. A positioning ring 24 is sleeved on one end of the main shaft 23, and an annular groove 211 adapted to the positioning ring 24 is opened on one side of the side ring 21; the positioning ring 24 is fixedly sleeved on one end of the main shaft 23, and when the main shaft 23 is limitedly sleeved on the power shaft 11, one end of the positioning ring 24 is inserted into the annular groove 211, so that when the main shaft 23 is driven by the power shaft 11, the main shaft 23 can rotate smoothly on one side of the side ring 21.

[0050] In this embodiment, three outer blades 25 and three inner blades 26 are preferably arranged on the main shaft 23, and a regulating mechanism 3 for adjusting the inner blades 26 is arranged on the side ring 21 and the main shaft 23. It should be noted that the three outer blades 25 are fixedly installed on the main shaft 23 at equal intervals, and the three inner blades 26 are driven by the regulating mechanism 3 to slide on the main shaft 23; the length of the inner blade 26 is longer than the outer blade 25, and the inner blade 26 and the outer blade 25 are adapted in shape and can be combined into one. A locking member 4 is provided at one end of the power shaft 11 for locking the position of the main shaft 23. When the main shaft 23 is limitedly sleeved on the power shaft 11, the main shaft 23 can be locked on the power shaft 11 through the locking member 4 to prevent the main shaft 23 from sliding off the power shaft 11 during rotation.

[0051] The underwater propeller 1 is provided with a protective frame 12 covering the outer blades 25 and the inner blades 26 , which can block debris and protect the outer blades 25 and the inner blades 26 .

[0052] Before the equipment is put into water for use, the main shaft 23 is first limitedly set on the power shaft 11, and one end of the positioning ring 24 is inserted into the annular groove 211 on the side ring 21, and the main shaft 23 is locked by the locking member 4. When the underwater propeller 1 is in operation, the outer blade 25 and the inner blade 26 on the main shaft 23 can be driven to rotate and generate propulsion in the water. In the initial state, the inner blade 26 and the outer blade 25 are combined so that the number of blades is three. At this time, it can run at a higher speed under the same power, which is suitable for high-speed applications. Fewer blades can reduce water resistance and improve propulsion efficiency. When low-speed and stable operation is required, the position and angle of the inner blade 26 can be adjusted by the regulating mechanism 3, so that the inner blade 26 is separated from the outer blade 25. At this time, the number of blades is six. Multiple blades can better grasp the water flow, improve the maneuverability in complex waters, and better disperse the load, which is suitable for applications requiring high loads.

[0053] Reference Figure 5 and Figure 6 As shown, in order to be able to adjust the positions and angles of the three inner blades 26 at the same time to better disperse the load and provide a smoother thrust, the regulating mechanism 3 includes two limit drive rings 31 slidably mounted on the main shaft 23, and the two limit drive rings 31 are located between the inner blades 26 and the positioning ring 24. In this embodiment, three T-shaped clamps 32 are preferably arranged equidistantly between the two limit drive rings 31, and the three T-shaped clamps 32 are fixedly installed between the two limit drive rings 31; three limit side grooves 231 for the three T-shaped clamps 32 to be installed and slid are provided on the main shaft 23; the inner diameter of the limit drive ring 31 is adapted to the outer diameter of the main shaft 23, and when the T-shaped clamp 32 is subjected to a driving force, it can drive the two limit drive rings 31 to slide on the main shaft 23.

[0054] A linkage control assembly 5 connected to the inner blade 26 is provided between the two limit drive rings 31 on the main shaft 23, and is used to connect the inner blade 26 so that it can slide on the main shaft 23; a driving unit 6 for driving the two limit drive rings 31 is provided on the side ring 21 and the main shaft 23. When the blade needs to be adjusted, the driving unit 6 is started to drive the limit drive ring 31 to slide on the main shaft 23, and the inner blade 26 can be separated from the outer blade 25 through the linkage control assembly 5, and the three inner blades 26 can be rotated to a certain angle synchronously to adjust to a multi-blade form.

[0055] Reference Figures 7 to 9As shown, considering the need to drive the inner blade 26 so that the inner blade 26 can move with the limit drive ring 31, the position and angle of the inner blade 26 can be automatically adjusted as needed. The joint control component 5 includes three assembly supports 51 respectively installed on the three inner blades 26 facing the side of the limit drive ring 31, and the assembly support 51 and the inner blade 26 are integrally arranged. A connecting end block 52 is clamped on the assembly support 51, and an inner connecting rod 53 is arranged on one side of the connecting end block 52, and the inner connecting rod 53 is located between the two limit drive rings 31. The assembly support 51, the connecting end block 52 and the inner connecting rod 53 are fixedly connected.

[0056] An outer sleeve shaft 54 ​​that contacts the two limit drive rings 31 is rotatably sleeved on the inner connecting rod 53, and an end ball 55 is installed at one end of the inner connecting rod 53 away from the connecting end block 52. A limiting slide groove 232 for limiting the sliding of the end ball 55 is obliquely opened on the main shaft 23. The end ball 55 is fixedly set at one end of the inner connecting rod 53 and is limited in the limiting slide groove 232. When the inner connecting rod 53 is pulled outward, the end ball 55 cannot be separated from the limiting slide groove 232. Only when the end ball 55 slides to the end of the limiting slide groove 232 can it be separated from the limiting slide groove 232. Therefore, when the driving unit 6 drives the two limiting driving rings 31 to slide on the main shaft 23, the inner blade 26 can be separated from the outer blade 25 first, and the inner blade 26 slides away from the outer blade 25. During the sliding process, due to the limitation of the end ball 55 by the limiting groove 232, the inner blade 26 will rotate at a certain angle while sliding.

[0057] Reference Fig.10 As shown, since it is necessary to limit the end ball 55 so that it can be locked after following the limit drive ring 31 to move and adjust the position, and cooperate with the drive unit 6 to limit the two limit drive rings 31 as a whole, it is prevented that the end ball 55 will move slightly in the limit slot 232 when the main shaft 23 rotates, and the stability of the inner blade 26 during rotation is further improved. A limit rod 56 is arranged on the main shaft 23 in the limit slot 232, and a magnet 57 with an attraction force on the end ball 55 is installed at one end of the limit rod 56 facing the inner blade 26. When the end ball 55 follows the limit drive ring 31 to move to the inclined end of the limit slot 232, it will conflict with the end of the limit rod 56. At this time, the position of the inner blade 26 is the final adjusted position, and there is a certain distance between the inner blade 26 and the outer blade 25, and the inner blade 26 rotates a certain angle, and the inner blade 26 is now located between the two outer blades 25.

[0058] The magnet 57 has a strong suction force on the end ball 55, which can achieve the purpose of locking and limiting the end ball 55, and prevent the end ball 55 from shaking and shifting slightly in the limiting slot 232 when the main shaft 23 rotates. It should be noted that although the two limiting drive rings 31 cooperate with the outer shaft 54 ​​and the limiting slot 232 to limit the inner blade 26, the inner blade 26 after position adjustment is independently set and no longer combined with the fixed outer blade 25, lacking the original resistance and dependence force, so a limiting rod 56 that allows the end ball 55 to cooperate and resist is fixed in the limiting slot 232, and a magnet 57 is installed at the end of the limiting rod 56 to further stabilize the end ball 55, so as to provide a guarantee for the stable rotation of the inner blade 26.

[0059] Reference Fig.11 and Fig.12 As shown, in order to drive the two limit drive rings 31 to slide on the main shaft 23 and automatically adjust the positions of the two limit drive rings 31 as needed, the drive unit 6 includes a bidirectional threaded rod 61 that is threaded through one of the T-shaped clamping blocks 32 and rotates in the limit side groove 231. The T-shaped clamping block 32 is provided with an internal threaded hole 321 that matches the bidirectional threaded rod 61. The bidirectional threaded rod 61 is sleeved with a ratchet gear 62. The main shaft 23 is provided with a rotating wheel groove 233 at the limit side groove 231 for the ratchet gear 62 to be installed. When the bidirectional threaded rod 61 is rotated by force, it can drive the two limit drive rings 31 to slide on the main shaft 23 by cooperating with the internal threaded hole 321 provided on the T-shaped clamping block 32.

[0060] Reference Fig.13 and Fig.14 As shown, considering the need to drive the bidirectional threaded rod 61 without affecting the normal rotation of the main shaft 23, in this embodiment, the side ring 21 is preferably provided with a ring gear 64 through three external blocks 63 for limited rotation toward the side of the limit drive ring 31, and the ring gear 64 is meshed with the ratchet gear 62, and the external block 63 has a control groove 631 adapted to the ring gear 64. It should be noted that there is damping between the three external blocks 63 and the ring gear 64. The power shaft 11 can only drive the main shaft 23 to rotate clockwise. When the main shaft 23 is operating to rotate clockwise, due to the meshing of the ring gear 64 and the ratchet gear 62, and the damping between the ring gear 64 and the external block 63, the ring gear 64 will not rotate at this time, and the ratchet gear 62 will rotate counterclockwise, but due to the characteristics of the ratchet gear 62, the bidirectional threaded rod 61 will not rotate when rotating counterclockwise, that is, the two limit drive rings 31 will not be driven to slide.

[0061] Replay Fig.13As shown, a waterproof motor 65 is embedded in the side ring 21, and an inner groove 212 for installing the waterproof motor 65 is provided on the side ring 21. A driving gear 66 meshing with the ring gear 64 is sleeved on the rotating shaft of the waterproof motor 65, and a tooth groove 641 adapted to the driving gear 66 is provided on the outer side of the ring gear 64. The side ring 21 is fixedly mounted on one side of the underwater propeller 1 and does not rotate. When the waterproof motor 65 is not started, the driving gear 66 cannot rotate, that is, the ring gear 64 meshing with the driving gear 66 cannot rotate, and there is damping between the ring gear 64 and the external block 63, so that the ring gear 64 is in a locked state at this time. When the main shaft 23 rotates, the ratchet gear 62 will rotate counterclockwise and cannot drive the bidirectional threaded rod 61 to rotate.

[0062] When the number of blades needs to be increased and low-speed operation is required to improve maneuverability, the underwater propeller 1 is stopped first, and the power shaft 11 and the main shaft 23 stop rotating. At this time, the waterproof motor 65 is started to drive the ring gear 64 to rotate clockwise through the driving gear 66, thereby driving the ratchet gear 62 to rotate clockwise to drive the bidirectional threaded rod 61 to rotate, and in cooperation with the internal threaded hole 321 opened on the T-shaped clamp block 32, the two limit driving rings 31 can be driven to slide on the main shaft 23 until the end ball 55 conflicts with the limit rod 56. Under the drive of the two limit driving rings 31 and the limiting action of the limiting groove 232 on the end ball 55, the inner blade 26 will be driven to slide on the main shaft 23 to adjust its position and rotate at a certain angle, and then the underwater propeller 1 is started again. The multi-blade form can provide a more stable thrust and better disperse the load.

[0063] When the inner blade 26 needs to be used in combination with the outer blade 25 and the number of blades is reduced, the underwater propeller 1 is stopped and the waterproof motor 65 is started again to drive the bidirectional threaded rod 61 to rotate. The bidirectional threaded rod 61 continues to rotate to drive the two limit drive rings 31 to reset, thereby driving the inner blade 26 to reset and merge with the outer blade 25.

[0064] Reference Fig.15 As shown, in order to prevent the main shaft 23 from sliding off the power shaft 11 during the rotation operation and affecting the normal operation of the equipment, the locking member 4 includes a locking cover 42 rotatably mounted on one end of the power shaft 11 by a bolt 41, and the bolt 41 and the locking cover 42 are fixedly connected, and it should be noted that the diameter of the locking cover 42 is the same as that of the main shaft 23; one end of the power shaft 11 has an internal thread lock hole 112 adapted to the bolt 41. The main shaft 23 is sleeved on the power shaft 11, and after the positioning ring 24 is inserted into the annular groove 211, the bolt 41 is inserted into the internal thread lock hole 112, and the locking cover 42 is rotated to make it press against the main shaft 23, so as to lock the main shaft 23 on the power shaft 11. The effect of quick disassembly and assembly is achieved.

[0065] Embodiment 2:

[0066] Reference Fig.16 and Fig.17 As shown, on the basis of Example 1, in order to be able to monitor the locking state of the main shaft 23, when the locking cover 42 is not completely pressed against one end of the main shaft 23 during long-term operation, and there is a gap between the locking cover 42 and the main shaft 23, a warning can be given in time to the outside, indicating that the main shaft 23 is not locked at this time and can slide on the power shaft 11, which poses a safety hazard when the power shaft 11 drives the main shaft 23 to rotate. In order to facilitate the staff to better understand the locking state of the locking cover 42 on the main shaft 23, the locking cover 42 is also provided with a monitoring member 7, which includes three T-shaped round rods 71 ​​embedded and slidably arranged on one side of the locking cover 42, and three built-in circular grooves 421 for installing the T-shaped round rods 71 ​​are equidistantly provided on one side of the locking cover 42. A warning light 72 is installed on the outer side of the locking cover 42, and a conflict switch 73 capable of controlling the warning light 72 is provided in each built-in circular groove 421. A limit ring 74 sleeved on the T-shaped round rod 71 is fixedly installed in the built-in circular groove 421, and a stretching spring 75 that conflicts with the limit ring 74 is sleeved on the T-shaped round rod 71. The stretching spring 75 always has a driving force to drive the T-shaped round rod 71 to slide out of the built-in circular groove 421.

[0067] When the locking cover 42 is rotated to make it contact with the main shaft 23, the protruding end of the T-shaped round rod 71 will first contact with the main shaft 23. When one side of the locking cover 42 is completely fitted and contacted with the end of the main shaft 23, the T-shaped round rod 71 will be completely retracted into the built-in circular groove 421 by the contact force, and will contact with the contact switch 73. When the three T-shaped round rods 71 ​​are completely entered into the built-in circular groove 421 and contact the corresponding contact switches 73 respectively, the warning light 72 will light up. After the power shaft 11 drives the main shaft 23 to operate for a long time, when the locking cover 42 no longer completely contacts the main shaft 23 and there is a gap between the two, the T-shaped round rod 71 will extend outward under the drive of the extension spring 75. Once the T-shaped round rod 71 extends outward and separates from the contact switch 73, the warning light 72 will go out and turn off to remind the staff, indicating that the locking cover 42 is loose and the main shaft 23 is no longer locked. The staff should tighten the locking cover 42 as soon as possible to prevent equipment failure during subsequent operation.

[0068] The implementation principle of this embodiment is:

[0069] (1) Assembly and locking: Before use, insert each inner side bar 22 in the main shaft 23 into the corresponding limit slot 111 on the power shaft 11, so that the main shaft 23 limit sleeve is set on the power shaft 11, and one end of the positioning ring 24 is inserted into the annular groove 211, and then insert the bolt 41 into the internal thread lock hole 112, tighten the locking cover 42 to make it press against one end of the main shaft 23, the T-shaped round rod 71 completely enters the built-in round groove 421 and contacts the contact switch 73, and the warning light 72 operates to monitor the loosening of the locking cover 42.

[0070] (2) Combined operation: After the main shaft 23 is sleeved on the power shaft 11, the inner blades 26 and the outer blades 25 are combined in the initial state. At this time, the number of blades on the main shaft 23 is three. At this time, the underwater propeller 1 can run at a higher speed under the same power, which is suitable for high-speed operation application scenarios.

[0071] (3) Blade adjustment: When low-speed operation is required to improve maneuverability, first shut down the underwater propeller 1 to stop the power shaft 11 and the main shaft 23. Start the waterproof motor 65 to rotate the two-way threaded rod 61 through the meshing of the ring gear 64 and the ratchet gear 62, so as to drive the limit drive ring 31 to slide on the main shaft 23, driving the inner blade 26 to slide away from the outer blade 25 and separate from the inner blade 26. During the process, the inner blade 26 will also rotate at a certain angle to adjust the position and angle of the inner blade 26.

[0072] (4) Positioning and locking: When the end ball 55 contacts the limiting rod 56, the magnet 57 installed at the end of the limiting rod 56 will attract the end ball 55 to lock it, so as to prevent the end ball 55 from shaking and shifting slightly in the limiting groove 232 when the main shaft 23 rotates. When the underwater propeller 1 is subsequently started, the adjusted multi-blade shape can provide a more stable thrust and better disperse the load.

[0073] The embodiments of this specific implementation method are all preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An adaptive propeller adjustment structure of a tail-mounted underwater propeller, comprising an underwater propeller (1) and a power shaft (11) mounted on the underwater propeller (1), wherein the power shaft (11) has a plurality of limit slots (111), and is characterized in that: The underwater propeller (1) is provided with a propeller adjustment device (2); the propeller adjustment device (2) comprises a side ring (21) installed at one end of the underwater propeller (1); a main shaft (23) is provided on the power shaft (11) through a plurality of inner strips (22) to limit the sleeve; a positioning ring (24) is sleeved on one end of the main shaft (23); an annular groove (211) adapted to the positioning ring (24) is opened on one side of the side ring (21); a plurality of outer blades (25) and inner blades (26) are arranged on the main shaft (23); a regulating mechanism (3) for adjusting the inner blades (26) is provided on the side ring (21) and the main shaft (23); a locking member (4) is provided on one end of the power shaft (11); The regulating mechanism (3) comprises two limit drive rings (31) slidably sleeved on the main shaft (23), and the two limit drive rings (31) are located between the inner blade (26) and the positioning ring (24), a plurality of T-shaped clamping blocks (32) are equidistantly arranged between the two limit drive rings (31), and the main shaft (23) is provided with a plurality of limit side grooves (231) for the plurality of T-shaped clamping blocks (32) to be installed and slidably; a joint control component (5) connected to the inner blade (26) is provided on the main shaft (23) between the two limit drive rings (31), and a driving unit (6) for driving the two limit drive rings (31) is provided on the side ring (21) and the main shaft (23); The joint control assembly (5) comprises a plurality of assembly supports (51) respectively mounted on the side of the plurality of inner blades (26) facing the limit drive ring (31), a connection end block (52) is clamped on the assembly support (51), an inner connecting rod (53) is arranged on one side of the connection end block (52), and the inner connecting rod (53) is located between the two limit drive rings (31); An outer sleeve shaft (54) is rotatably sleeved on the inner connecting rod (53) and contacts the two limit drive rings (31); an end of the inner connecting rod (53) away from the connecting end block (52) is installed with an end ball (55); and a limiting slide groove (232) is obliquely provided on the main shaft (23) for the end ball (55) to slide in a limited position; A limiting rod (56) is arranged in the limiting slide groove (232) on the main shaft (23), and a magnet (57) having an attractive force on the end-mounted round ball (55) is installed on one end of the limiting rod (56) facing the inner blade (26).

2. The adaptive propeller adjustment structure of a tail-mounted underwater propeller according to claim 1, characterized in that: The driving unit (6) comprises a bidirectional threaded rod (61) threadedly penetrating one of the T-shaped clamping blocks (32) and rotatably arranged in the limiting side groove (231); an internal threaded hole (321) adapted to the bidirectional threaded rod (61) is penetrated through the T-shaped clamping block (32); a ratchet gear (62) is sleeved on the bidirectional threaded rod (61); and a rotating wheel groove (233) for mounting the ratchet gear (62) is arranged on the main body shaft (23) at the limiting side groove (231).

3. The adaptive propeller adjustment structure of a tail-mounted underwater propeller according to claim 2, characterized in that: A ring gear (64) is mounted on the side ring (21) toward the limit driving ring (31) through a plurality of external clamping blocks (63) for limited rotation, and the ring gear (64) is meshed with the ratchet gear (62). The external clamping block (63) has a control groove (631) adapted to the ring gear (64).

4. The adaptive propeller adjustment structure of a tail-mounted underwater propeller according to claim 3, characterized in that: The side circular ring (21) is embedded with a waterproof motor (65), and the side circular ring (21) is provided with an inner groove (212) for installing the waterproof motor (65). The rotating shaft of the waterproof motor (65) is sleeved with a driving gear (66) meshing with the ring gear (64), and the outer side of the ring gear (64) has a tooth groove (641) adapted to the driving gear (66).

5. The adaptive propeller adjustment structure of a tail-mounted underwater propeller according to claim 1, characterized in that: The locking member (4) comprises a locking cover (42) rotatably mounted on one end of the power shaft (11) via a bolt (41); one end of the power shaft (11) has an internal thread locking hole (112) adapted to the bolt (41).

6. The adaptive propeller adjustment structure of a tail-mounted underwater propeller according to claim 1, characterized in that: The underwater propeller (1) is provided with a protection frame (12) covering the outer blades (25) and the inner blades (26).

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