A multi-stage differential propeller

Abstract

The present invention relates to the field of ship propulsion technology, and specifically to a multi-stage differential propeller, comprising a mounting seat, two connecting seats being arranged below the mounting seat, turbine propellers being arranged on the two connecting seats, and also comprising two displacement blocks, which are respectively connected to the two connecting seats; a horizontal adjustment mechanism being arranged on the mounting seat; a vertical adjustment mechanism being arranged on the horizontal adjustment mechanism; and a switching mechanism being arranged on the mounting seat. This multi-stage differential propeller is different from the prior art in that when in use, the staff utilizes the horizontal adjustment mechanism to drive the two displacement blocks to move horizontally, thereby adjusting the horizontal spacing between the two turbine propellers, utilizes the vertical adjustment mechanism to drive the two displacement blocks to move vertically, thereby adjusting the launching depth of the two turbine propellers, and utilizes the switching mechanism to switch the horizontal and vertical displacement modes of the two turbine propellers, so that the spacing and the launching depth of the turbine propellers can be adjusted to match different ship types and improve the propulsion effect.

Description

Technical Field

[0001] The present invention relates to the technical field of ship propulsion, and in particular to a multi-stage differential propeller. Background Art

[0002] A turbine is a rotary power machine that converts the energy of a flowing working fluid into mechanical work. It is widely used in ship propulsion. In the tourism and recreation industry, two turbine propellers are often installed at the stern of the ship. By controlling the rotation direction and speed of the two, the ship can move forward, backward, turn, accelerate, and decelerate.

[0003] Existing turbine propellers are mostly installed at the stern or bottom of the ship according to the ship type, and their spacing cannot be adjusted. When the ship is carrying cargo or personnel, its immersion depth will change. The turbine propeller needs to be at the appropriate immersion depth to complete the propulsion work more efficiently. To this end, we propose a multi-stage differential propeller. Summary of the Invention

[0004] One of the technical problems to be solved by this application is: how to make the spacing and water entry depth of turbine propellers adjustable to match different ship types and improve the propulsion effect.

[0005] To solve the above technical problems, an embodiment of the present application provides a multi-stage differential propeller, comprising a mounting seat, two connecting seats provided below the mounting seat, both of which are provided with turbine propellers, and further comprising:

[0006] Displacement blocks, wherein two displacement blocks are provided, and the two displacement blocks are respectively connected to two connecting seats;

[0007] A horizontal adjustment mechanism, used for driving the two displacement blocks to perform horizontal displacement, thereby adjusting the horizontal distance between the two turbine propellers, and disposed on the mounting seat;

[0008] A vertical adjustment mechanism, used for driving the two displacement blocks to perform vertical displacement, thereby adjusting the launching depth of the two turbine propellers, and provided on the horizontal adjustment mechanism;

[0009] The switching mechanism is used to switch between the horizontal and vertical displacement modes of the two turbine propellers and is arranged on the mounting seat.

[0010] In some embodiments, the level adjustment mechanism includes a placement box disposed on the mounting base;

[0011] The placement box is provided with a reverse component for driving the two displacement blocks to perform synchronous reverse displacement in the horizontal direction;

[0012] The mounting seat is provided with a driving assembly for providing driving force for driving the two displacement blocks to move.

[0013] In some embodiments, the reverse component includes a rotating shaft rotatably arranged on the placement box, a rotating gear is arranged on the rotating shaft, racks are engaged on both sides of the rotating gear, the two racks are slidingly connected to the placement box, and a connecting block is arranged at one end of the two racks, and the two connecting blocks are slidingly connected to the two displacement blocks respectively.

[0014] In some embodiments, the drive assembly includes a drive shaft rotatably arranged on a mounting base, a worm is provided on the drive shaft, a rotating plate is provided at one end of the drive shaft, an input shaft is rotatably arranged on the mounting base, a worm wheel is provided on the input shaft, and the worm wheel is engaged with the worm.

[0015] In some embodiments, the vertical adjustment mechanism includes four sliders slidably arranged on the placement box, an output shaft is rotatably arranged between two sliders on the same side in the vertical direction, the two displacement blocks are respectively threadedly connected to the corresponding output shafts, the threaded portion of the output shaft is located between the opposite end surfaces of the two sliders, two fitting blocks are respectively provided on the two displacement blocks, the four fitting blocks are all fitted with the inner surface of the placement box, and limiting columns are respectively provided on the two displacement blocks, and the two limiting columns are movably connected to the placement box;

[0016] The mounting seat is provided with a linkage assembly for changing the spacing between the two output shafts during the horizontal displacement of the two displacement blocks to ensure the rotatability of the two output shafts.

[0017] In some embodiments, the linkage assembly includes a concentric shaft rotatably arranged on a mounting base, a concentric gear is arranged on the concentric shaft, two transmission shafts are arranged above the mounting base, a transmission gear is provided on each of the two transmission shafts, and the two transmission gears are meshed with the concentric gears, the two output shafts are slidably connected to the mounting base, the two output shafts are provided with an output gear, and the two output gears are respectively meshed with the transmission gears on the same side, a first linkage bar is arranged between the concentric shaft and the two transmission shafts, and a second linkage bar is arranged between the transmission shaft and the output shaft on the same side;

[0018] The mounting seat is provided with two limiting members for limiting the positions of the two output shafts respectively.

[0019] In some embodiments, the limiting member includes a limiting block provided on the output shaft and rotatably connected thereto, a limiting rod is provided on the limiting block, a limiting plate is provided on the mounting seat, and the limiting rod is slidably connected to the limiting plate.

[0020] In some embodiments, the switching mechanism includes two sliding seats slidably disposed on the input shaft, the two sliding seats facing opposite directions, and a plurality of active rotating strips disposed on each of the two sliding seats; and a sleeve seat is disposed on each of the rotating shaft and the concentric shaft, the two sleeve seats facing opposite directions, and a plurality of driven rotating strips disposed on each of the two sleeve seats;

[0021] The mounting seat is provided with a displacement assembly for driving the two sliding seats to move.

[0022] In some embodiments, the displacement assembly includes two displacement plates slidingly arranged on a mounting seat, the end faces of the two displacement plates are respectively fitted with two sliding seats, a screw is rotatably arranged on the mounting seat, the two displacement plates are threadedly connected to the screw, and a turntable is provided at one end of the screw.

[0023] In some embodiments, the slotted portions of the placement box are all slidably provided with baffles, and a plurality of the baffles are each provided with a spring.

[0024] The present invention has at least the following beneficial effects:

[0025] Different from the existing technology, when using this multi-stage differential propeller, the staff uses the horizontal adjustment mechanism to drive the two displacement blocks to perform horizontal displacement, thereby adjusting the horizontal spacing between the two turbine propellers, and uses the vertical adjustment mechanism to drive the two displacement blocks to perform vertical displacement, thereby adjusting the launching depth of the two turbine propellers. The switching mechanism is used to switch the horizontal and vertical displacement modes of the two turbine propellers, so that the spacing and water entry depth of the turbine propellers can be adjusted to match different ship types and improve the propulsion effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0027] Figure 2 For the present invention Figure 1 Schematic diagram of the local cross-section structure;

[0028] Figure 3 For the present invention Figure 2 Schematic diagram of the local cross-section structure;

[0029] Figure 4 For the present invention Figure 3 Another structural diagram;

[0030] Figure 5 For the present invention Figure 3 Schematic diagram of the local cross-section structure;

[0031] Figure 6 This is a schematic diagram of the linkage assembly structure of the present invention;

[0032] Figure 7 This is a schematic diagram of the structure of the drive assembly and displacement assembly of the present invention;

[0033] Figure 8 This is a structural diagram of the sliding seat and the sleeve seat of the present invention;

[0034] Figure 9 This is a schematic diagram of the overall structure of Example 2 of the present invention;

[0035] Figure 10 This is a schematic diagram of the baffle and spring structure in Example 2 of the present invention.

[0036] In the figure: 1. Mounting seat; 2. Connecting seat; 3. Turbine propeller; 4. Displacement block; 5. Horizontal adjustment mechanism; 51. Placement box; 6. Vertical adjustment mechanism; 61. Slider; 62. Output shaft; 63. Fitting block; 64. Limiting column; 7. Switching mechanism; 71. Sliding seat; 72. Active turning bar; 73. Socket seat; 74. Driven turning bar; 8. Reverse assembly; 81. Rotating shaft; 82. Rotating gear; 83. Rack; 84. Connecting block; 9. Driving assembly; 91. Driving shaft; 9 2. Worm; 93. Rotating plate; 94. Input shaft; 95. Worm gear; 10. Linkage assembly; 101. Concentric shaft; 102. Concentric gear; 103. Drive shaft; 104. Drive gear; 105. Output gear; 106. First linkage bar; 107. Second linkage bar; 11. Limiting member; 111. Limiting block; 112. Limiting rod; 113. Limiting plate; 12. Displacement assembly; 121. Displacement plate; 122. Screw; 123. Turntable; 13. Baffle; 14. Spring. DETAILED DESCRIPTION

[0037] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0038] Example 1

[0039] See also Figure 1-8 , the present invention provides a technical solution:

[0040] A multi-stage differential propeller includes a mounting base 1, two connecting bases 2 are provided below the mounting base 1, and turbine propellers 3 are provided on the two connecting bases 2. The two turbine propellers 3 are respectively mounted on the two connecting bases 2. The connecting bases 2 can be set as a triangular stable structure to enhance the stability of the turbine propellers 3. The two turbine propellers 3 are externally connected to a driving power supply, a controller, a connecting line, etc., and can be remotely controlled and adjusted to perform rotational propulsion and speed control of the two turbine propellers 3 to complete the ship's forward, backward, turning, acceleration and deceleration and other actions. The specific structure and travel mode are not repeated here, and also include:

[0041] Displacement blocks 4, two displacement blocks 4 are provided, and the two displacement blocks 4 are respectively connected to the two connecting seats 2;

[0042] The horizontal adjustment mechanism 5 is used to drive the two displacement blocks 4 to perform horizontal displacement, thereby adjusting the horizontal distance between the two turbine propellers 3, and is provided on the mounting base 1;

[0043] The vertical adjustment mechanism 6 is used to drive the two displacement blocks 4 to perform vertical displacement, thereby adjusting the submerged depth of the two turbine propellers 3, and is provided on the horizontal adjustment mechanism 5;

[0044] The switching mechanism 7 is used to switch between the horizontal and vertical displacement modes of the two turbine propellers 3 and is provided on the mounting seat 1 .

[0045] The horizontal adjustment mechanism 5 includes a placement box 51 arranged on the mounting base 1; a certain distance is maintained between the placement box 51 and the side panel of the mounting base 1, and the entire structure can be placed at the stern bulkhead, and the mounting base 1, the placement box 51 and the stern can be connected and fixed by screwing in screws.

[0046] A reverse component 8 is provided on the placement box 51, which is used to drive the two displacement blocks 4 to perform synchronous reverse displacement in the horizontal direction; the reverse component 8 includes a rotating shaft 81 rotatably set on the placement box 51, and a rotating gear 82 is provided on the rotating shaft 81. Racks 83 are engaged on both sides of the rotating gear 82, and the two racks 83 are slidingly connected to the placement box 51. One end of the two racks 83 is provided with a connecting block 84, and the two connecting blocks 84 are respectively slidingly connected to the two displacement blocks 4; the rotating shaft 81 drives the rotating gear 82 to rotate, and drives the two racks 83 to synchronously reverse displacement through transmission, and drives the two displacement blocks 4 to synchronously reverse displacement through the connecting block 84, thereby adjusting the horizontal spacing between the two turbine propellers 3.

[0047] A driving assembly 9 is provided on the mounting seat 1, which is used to provide driving force for driving the two displacement blocks 4 to move; the driving assembly 9 includes a driving shaft 91 rotatably provided on the mounting seat 1, a worm 92 is provided on the driving shaft 91, a rotating plate 93 is provided at one end of the driving shaft 91, an input shaft 94 is rotatably provided on the mounting seat 1, a worm gear 95 is provided on the input shaft 94, and the worm gear 95 is engaged with the worm 92; the rotating plate 93 drives the driving shaft 91 and the worm 92 to rotate, and drives the worm gear 95 and the input shaft 94 to rotate through transmission; during the propulsion process of the turbine propeller 3, the internal components of the overall structure will be subjected to a certain reaction force, and self-locking is formed between the worm gear 95 and the worm 92 to avoid the components from being displaced by force, thereby ensuring the stability of the overall structure.

[0048] The vertical adjustment mechanism 6 includes four sliders 61 slidably arranged on the placement box 51, and an output shaft 62 is rotatably arranged between the two sliders 61 on the same side in the vertical direction. The two displacement blocks 4 are respectively threadedly connected to the corresponding output shafts 62, and the threaded portion of the output shaft 62 is located between the opposite end faces of the two sliders 61. Two fitting blocks 63 are provided on the two displacement blocks 4, and the four fitting blocks 63 are all fitted with the inner surface of the placement box 51. Limiting columns 64 are provided on the two displacement blocks 4, and the two limiting columns 64 are movably connected to the placement box 51; the output shaft 62 rotates and drives the two displacement blocks 4 to move in the vertical direction by screwing in the thread, thereby adjusting the launching depth of the two turbine propellers 3; the limiting columns 64 are movably connected to the placement box 51, and limit the position of the displacement block 4 during the horizontal and vertical displacement of the turbine propeller 3 to prevent the displacement block 4 from deflecting; the displacement block 4 forms a contact fit with the placement box 51 through the fitting blocks 63, further limiting the position of the displacement block 4 to ensure smooth displacement of the displacement block 4.

[0049] A linkage assembly 10 is provided on the mounting seat 1, which is used to change the spacing between the two output shafts 62 during the horizontal displacement of the two displacement blocks 4 to ensure the rotatability of the two output shafts 62; the linkage assembly 10 includes a concentric shaft 101 rotatably arranged on the mounting seat 1, and a concentric gear 102 is provided on the concentric shaft 101. Two transmission shafts 103 are provided above the mounting seat 1, and transmission gears 104 are provided on the two transmission shafts 103. The two transmission gears 104 are meshed with the concentric gears 102. The two output shafts 62 are slidably connected to the mounting seat 1, and output gears 105 are provided on the two output shafts 62. The two output gears 105 are respectively meshed with the transmission gears 104 on the same side. A first linkage bar 106 is provided between the concentric shaft 101 and the two transmission shafts 103, and a second linkage bar 107 is provided between the transmission shaft 103 and the output shaft 62 on the same side; the first linkage bar 106 is rotatably connected to the concentric shaft 101 and the transmission shaft 103, and the second linkage bar 107 is provided between the transmission shaft 103 and the output shaft 62 on the same side; the first linkage bar 106 is rotatably connected to the concentric shaft 101 and the transmission shaft 103, The second linkage bar 107 is rotationally connected with the transmission shaft 103 and the output shaft 62; the displacement block 4 displaces in the horizontal direction, driving the slider 61 and the output shaft 62 to displace in the horizontal direction. Under the action of the first linkage bar 106 and the second linkage bar 107, the transmission gear 104 and the output gear 105 are displaced and deflected, and still maintain the meshing state, ensuring the displacement and rotatability of the two output gears 105 and the output shaft 62; during the synchronous displacement of the two output shafts 62, the concentric gear 102 rotates; during the synchronous horizontal displacement of the two displacement blocks 4, the rotating gear 82 rotates, and the two racks 83 are synchronously displaced horizontally; the sliding groove of the sliding connection between the rack 83 and the displacement block 4 can be adaptively adjusted, the groove width becomes relatively larger, and the tooth spacing of the rack 83 is adaptively adjusted. Its height can be greater than the height of the rotating gear 82, so that the output shaft 62 and the displacement block 4 are synchronously displaced while ensuring connectivity with the rack 83, providing it with movement space and eliminating movement conflict.

[0050] Two limiting members 11 are provided on the mounting seat 1, which are used to limit the positions of the two output shafts 62 respectively; the limiting member 11 includes a limiting block 111 provided on the output shaft 62 and rotatably connected thereto, a limiting rod 112 is provided on the limiting block 111, and a limiting plate 113 is provided on the mounting seat 1, and the limiting rod 112 is slidably connected to the limiting plate 113; under the action of the limiting rod 112, the slider 61, etc., the output gear 105 is ensured to maintain engagement with the transmission gear 104 during the displacement and rotation process to avoid disengagement caused by lateral rotation.

[0051] When the cam 72 is in the unlocked position, the two cams 73 are locked and the two cams 73 are locked.

[0052] A displacement assembly 12 is provided on the mounting seat 1, which is used to drive the two sliding seats 71 to move; the displacement assembly 12 includes two displacement plates 121 slidably provided on the mounting seat 1, and the end faces of the two displacement plates 121 are respectively fitted with the two sliding seats 71, and a screw 122 is rotatably provided on the mounting seat 1, and the two displacement plates 121 are both threadedly connected to the screw 122, and a turntable 123 is provided at one end of the screw 122; the end face of the displacement plate 121 is arc-shaped, and the displacement plate 121 drives the sliding seat 71 to move without rotating together with the sliding seat 71; rotating the turntable 123 drives the screw 122 to rotate, and drives the two displacement plates 121 to move by screwing in, thereby driving the two sliding seats 71 to move.

[0053] When in use, a certain distance is maintained between the placement box 51 and the side plate of the mounting seat 1, and the overall structure can be placed at the stern bulkhead, and the mounting seat 1, the placement box 51 and the stern can be connected and fixed by screwing in the screw; the screw 122 can be driven to rotate by rotating the turntable 123, and the two displacement plates 121 can be displaced by screwing in, thereby driving the two sliding seats 71 to displace, and the drive shaft 91 and the worm 92 can be driven to rotate by rotating the turn plate 93, and the worm gear 95, the input shaft 94, the sliding seat 71, and the active rotating bar 72 can be rotated through the transmission; when the horizontal spacing between the two turbine propellers 3 needs to be adjusted, the sliding seat 71 is controlled to move downward so that the lower sliding seat 71 enters the socket seat 73, and at this time the active rotating bar 72 rotates to drive the driven rotating bar 74, the socket seat 73, the rotating shaft 81, and the rotating gear 82 to rotate, and the two racks 83 are driven to move in the opposite direction synchronously through the transmission, and the two displacement blocks 4 are driven in the opposite direction synchronously through the connecting block 84. Displacement, thereby adjusting the horizontal spacing between the two turbine propellers 3. During this process, the displacement block 4 displaces in the horizontal direction, driving the slider 61 and the output shaft 62 to displace in the horizontal direction. Under the action of the first linkage bar 106 and the second linkage bar 107, the transmission gear 104 and the output gear 105 are displaced and deflected, and still maintain the meshing state, ensuring the displacement and rotatability of the two output gears 105 and the output shaft 62; when it is necessary to adjust the launching depth of the two turbine propellers 3, the sliding seat 71 is controlled to displace upward so that the upper sliding seat 71 enters the socket seat 73. At this time, the active rotating bar 72 rotates to drive the driven rotating bar 74, the socket seat 73, the concentric shaft 101, and the concentric gear 102 to rotate, and the transmission gear 104, the output gear 105, and the output shaft 62 are driven to rotate. The output shaft 62 drives the two displacement blocks 4 to displace in the vertical direction by screwing in, thereby adjusting the launching depth of the two turbine propellers 3.

[0054] Example 2

[0055] See also Figure 9-10 , the present invention provides a technical solution:

[0056] What is different from Example 1 is that the slotted parts of the placement box 51 are all slidably provided with baffles 13, and springs 14 are provided on multiple baffles 13; during the displacement of structures such as the displacement block 4 and the limit column 64, the baffles 13 pop out or retract under the action of the spring 14, blocking the slotted parts of the placement box 51, preventing water from entering the placement box 51, reducing the occurrence of rust, and extending the service life of the overall structure.

[0057] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0058] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A multi-stage differential propeller, comprising a mounting seat (1), two connecting seats (2) are provided below the mounting seat (1), and turbine propellers (3) are provided on both connecting seats (2), characterized in that: It also includes: a displacement block (4), wherein two displacement blocks (4) are provided, and the two displacement blocks (4) are respectively connected to the two connecting seats (2); A horizontal adjustment mechanism (5) is used to drive the two displacement blocks (4) to perform horizontal displacement, thereby adjusting the horizontal distance between the two turbine propellers (3), and is arranged on the mounting seat (1); A vertical adjustment mechanism (6) is used to drive the two displacement blocks (4) to perform vertical displacement, thereby adjusting the submerged depth of the two turbine propellers (3), and is arranged on the horizontal adjustment mechanism (5); A switching mechanism (7) is used for switching the horizontal and vertical displacement modes of the two turbine propellers (3), and is arranged on the mounting seat (1); The horizontal adjustment mechanism (5) comprises a placement box (51) arranged on the mounting seat (1); The placement box (51) is provided with a reverse assembly (8) for driving the two displacement blocks (4) to perform synchronous reverse displacement in the horizontal direction; The mounting seat (1) is provided with a driving assembly (9) for providing a driving force for driving the two displacement blocks (4) to move; The reverse assembly (8) comprises a rotating shaft (81) rotatably arranged on the placement box (51), a rotating gear (82) is arranged on the rotating shaft (81), racks (83) are meshed on both sides of the rotating gear (82), the two racks (83) are slidably connected to the placement box (51), and one end of the two racks (83) is provided with a connecting block (84), and the two connecting blocks (84) are slidably connected to the two displacement blocks (4) respectively.

2. The multi-stage differential propeller according to claim 1, characterized in that: The drive assembly (9) comprises a drive shaft (91) rotatably mounted on a mounting seat (1), a worm (92) being mounted on the drive shaft (91), a rotating plate (93) being mounted at one end of the drive shaft (91), an input shaft (94) being rotatably mounted on the mounting seat (1), a worm gear (95) being mounted on the input shaft (94), and the worm gear (95) being meshed with the worm gear (92).

3. The multi-stage differential propeller according to claim 2, characterized in that: The vertical adjustment mechanism (6) includes four sliders (61) slidably arranged on the placement box (51), an output shaft (62) is rotatably arranged between the two sliders (61) on the same side in the vertical direction, the two displacement blocks (4) are respectively threadedly connected to the corresponding output shafts (62), the threaded portion of the output shaft (62) is located between the opposite end faces of the two sliders (61), two fitting blocks (63) are respectively provided on the two displacement blocks (4), the four fitting blocks (63) are all fitted with the inner surface of the placement box (51), and the two displacement blocks (4) are each provided with a limiting column (64), and the two limiting columns (64) are both movably connected to the placement box (51); The mounting seat (1) is provided with a linkage assembly (10) for changing the spacing between the two output shafts (62) during the horizontal displacement of the two displacement blocks (4) to ensure the rotatability of the two output shafts (62).

4. The multi-stage differential propeller according to claim 3, characterized in that: The linkage assembly (10) comprises a concentric shaft (101) rotatably arranged on a mounting seat (1), a concentric gear (102) being arranged on the concentric shaft (101), two transmission shafts (103) being arranged above the mounting seat (1), a transmission gear (104) being arranged on each of the two transmission shafts (103), and the two transmission gears (104) being meshed with the concentric gear (102), the two output shafts (62) being slidably connected to the mounting seat (1), an output gear (105) being arranged on each of the two output shafts (62), and the two output gears (105) being meshed with the transmission gear (104) on the same side, a first linkage bar (106) being arranged between the concentric shaft (101) and the two transmission shafts (103), and a second linkage bar (107) being arranged between the transmission shaft (103) and the output shaft (62) on the same side; Two position limiting members (11) are provided on the mounting seat (1) for respectively limiting the positions of the two output shafts (62).

5. The multi-stage differential propeller according to claim 4, characterized in that: The limiting member (11) comprises a limiting block (111) arranged on the output shaft (62) and rotatably connected thereto, a limiting rod (112) being arranged on the limiting block (111), a limiting plate (113) being arranged on the mounting seat (1), and the limiting rod (112) being slidably connected to the limiting plate (113).

6. The multi-stage differential propeller according to claim 5, characterized in that: The switching mechanism (7) comprises two sliding seats (71) slidably arranged on the input shaft (94), the two sliding seats (71) facing opposite directions, and a plurality of active rotating bars (72) being provided on each of the two sliding seats (71); a sleeve seat (73) being provided on each of the rotating shaft (81) and the concentric shaft (101), the two sleeve seats (73) facing opposite directions, and a plurality of driven rotating bars (74) being provided on each of the two sleeve seats (73); The mounting seat (1) is provided with a displacement assembly (12) for driving the two sliding seats (71) to move.

7. The multi-stage differential propeller according to claim 6, characterized in that: The displacement assembly (12) comprises two displacement plates (121) slidably arranged on the mounting seat (1), the end surfaces of the two displacement plates (121) respectively fit with the two sliding seats (71), a screw rod (122) is rotatably arranged on the mounting seat (1), the two displacement plates (121) are both threadedly connected to the screw rod (122), and a rotating disk (123) is provided at one end of the screw rod (122).

8. The multi-stage differential propeller according to claim 7, characterized in that: The slotted portions of the placement box (51) are all slidably provided with baffles (13), and a plurality of the baffles (13) are all provided with springs (14).

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