Surface paddle propelling device

Abstract

The utility model discloses a surface propeller propelling device which comprises a stern transom plate, and the stern transom plate is provided with three propelling units which are a propelling unit A, a propelling unit B and a propelling unit C in sequence from left to right. The surface paddle propelling device further comprises a connecting rod assembly A, a connecting rod assembly B and a connecting piece. The connecting piece is installed on the propelling unit B, the left end of the connecting rod assembly A is connected with the propelling unit A, the right end of the connecting rod assembly A is connected with the connecting piece, the left end of the connecting rod assembly B is connected with the connecting piece, and the right end of the connecting rod assembly B is connected with the propelling unit C. The surface paddle propelling device can meet the use requirements of three-machine three-paddle boats, and is simple to manufacture and low in manufacturing cost.

Description

Technical Field

[0001] The utility model relates to the technical field of boats and ships, in particular to a surface propeller propulsion device. Background Art

[0002] In view of many environmental problems, it has become increasingly popular to use electricity instead of transportation tools powered by internal combustion engines. So far, the most common commercial examples of this trend are mainly in the automotive industry. The technology of electric drives has also begun to be used in the marine industry.

[0003] A semi-submerged propeller is a special propeller in which part of the propeller blades are exposed above the water surface during normal operation, also known as a surface propeller, and can be widely used in inland rivers and high-speed ships at sea. The semi-submerged propeller propulsion device consists of two major parts: a semi-submerged propeller and its auxiliary components, and a direction control device. Driven by a prime mover, the device adjusts the thrust by changing the propeller speed, and realizes the matching of ship steering and propeller movement by operating the steering mechanism (steering cylinder and trimming cylinder).

[0004] In the prior art, most high-speed boats are single-engine single-propeller or twin-engine twin-propeller. Summary of the Invention

[0005] In order to overcome the above defects, the technical problem solved by the utility model is to provide a surface propeller propulsion device, which can meet the use of boats with three engines and three propellers, is simple to manufacture, and has a low manufacturing cost.

[0006] A surface propeller propulsion device of the utility model includes a stern seal plate, and three propulsion units are arranged on the stern seal plate, which are propulsion unit A, propulsion unit B, and propulsion unit C from left to right in sequence; the surface propeller propulsion device further includes a connecting rod assembly A, a connecting rod assembly B, and a connecting piece; the connecting piece is installed on the propulsion unit B, the left end of the connecting rod assembly A is connected to the propulsion unit A, the right end of the connecting rod assembly A is connected to the connecting piece, the left end of the connecting rod assembly B is connected to the connecting piece, and the right end of the connecting rod assembly B is connected to the propulsion unit C.

[0007] Further, the connecting rod assembly A includes a connecting rod A. The right end of a screw rod A1 is threadedly connected to the left end of the connecting rod A, and the connecting rod A and the screw rod A1 are locked by a locking nut A1. The left end of the screw rod A1 is connected to the right end of a fork-shaped block A1 through a connecting pin A1. The left end of the fork-shaped block A1 is connected to a pin shaft A through a connecting pin A2, and the pin shaft A is connected to the propulsion unit A. The left end of a screw rod A2 is threadedly connected to the right end of the connecting rod A, and the connecting rod A and the screw rod A2 are locked by a locking nut A3. The right end of the screw rod A2 is connected to the left end of a fork-shaped block A2 through a connecting pin A3, and the right end of the fork-shaped block A2 is connected to the left end of the connecting member through a connecting pin A4.

[0008] Further, a flat key A is arranged on the pin shaft A.

[0009] Further, the connecting rod assembly B includes a connecting rod B. The left end of a screw rod B1 is threadedly connected to the right end of the connecting rod B, and the connecting rod B and the screw rod B1 are locked by a locking nut B1. The right end of the screw rod B1 is connected to the left end of a fork-shaped block B1 through a connecting pin B1. The right end of the fork-shaped block B1 is connected to a pin shaft B through a connecting pin B2, and the pin shaft B is connected to the propulsion unit C. The right end of a screw rod B2 is threadedly connected to the left end of the connecting rod B, and the connecting rod B and the screw rod B2 are locked by a locking nut B3. The left end of the screw rod B2 is connected to the right end of a fork-shaped block B2 through a connecting pin B3, and the left end of the fork-shaped block B2 is connected to the right end of the connecting member through a connecting pin B4.

[0010] Further, a flat key B is arranged on the pin shaft B.

[0011] Further, the propulsion unit A includes a connecting flange A. One end of the connecting flange A is fixed to the stern seal plate, and the other end of the connecting flange A is connected to one end of a steering mechanism A. The other end of the steering mechanism A is connected to a stern shaft tube A. An input shaft A is arranged inside the connecting flange A, and a gearbox A providing power is connected to the input shaft A. A shafting A is arranged inside the stern shaft tube A. One end of the shafting A is connected to the input shaft A, and the other end of the shafting A is connected to a surface propeller A. The propulsion unit A further includes a trimming hydraulic cylinder A. One end of the trimming hydraulic cylinder A is rotatably connected to the stern seal plate, and the other end of the trimming hydraulic cylinder A is rotatably connected to the stern shaft tube A. The propulsion unit A further includes a steering hydraulic cylinder A. One end of the steering hydraulic cylinder A is rotatably connected to the stern seal plate, and the other end of the steering hydraulic cylinder A is rotatably connected to the stern shaft tube A. A rudder blade A is further arranged on the stern shaft tube A.

[0012] Further, the pin shaft A is installed on the stern shaft tube A, and a locking nut A2 is arranged at the left end of the pin shaft A.

[0013] Furthermore, the propulsion unit C includes a connecting flange C. One end of the connecting flange C is fixed to the stern seal plate, and the other end of the connecting flange C is connected to one end of the steering mechanism C. The other end of the steering mechanism C is connected to a stern tube C; an input shaft C is arranged inside the connecting flange C, and a gearbox C that provides power is connected to the input shaft C; a shafting C is arranged inside the stern tube C. One end of the shafting C is connected to the input shaft C, and the other end of the shafting C is connected to a surface propeller C; the propulsion unit C further includes a trimming hydraulic cylinder C. One end of the trimming hydraulic cylinder C is rotatably connected to the stern seal plate, and the other end of the trimming hydraulic cylinder C is rotatably connected to the stern tube C; the propulsion unit C further includes a steering hydraulic cylinder C. One end of the steering hydraulic cylinder C is rotatably connected to the stern seal plate, and the other end of the steering hydraulic cylinder C is rotatably connected to the stern tube C; a rudder blade C is further arranged on the stern tube C.

[0014] Furthermore, the pin shaft B is installed on the stern tube C, and a locking nut B2 is arranged at the right end of the pin shaft B.

[0015] Furthermore, the propulsion unit B includes a connecting flange B. One end of the connecting flange B is fixed to the stern seal plate, and the other end of the connecting flange B is connected to one end of the steering mechanism B. The other end of the steering mechanism B is connected to a stern tube B; an input shaft B is arranged inside the connecting flange B, and a gearbox B that provides power is connected to the input shaft B; a shafting B is arranged inside the stern tube B. One end of the shafting B is connected to the input shaft B, and the other end of the shafting B is connected to a surface propeller B; the propulsion unit B further includes a trimming hydraulic cylinder B. One end of the trimming hydraulic cylinder B is rotatably connected to the stern seal plate, and the other end of the trimming hydraulic cylinder B is rotatably connected to the stern tube B; a rudder blade B is further arranged on the stern tube B; the connecting piece is installed on the stern tube B.

[0016] After adopting the above technical solution, the beneficial effect of the present utility model is that the surface propeller propulsion device includes a stern seal plate, and three propulsion units are arranged on the stern seal plate, which are the propulsion unit A, the propulsion unit B, and the propulsion unit C from left to right in sequence; the surface propeller propulsion device further includes a connecting rod assembly A, a connecting rod assembly B, and a connecting piece. The connecting piece is installed on the propulsion unit B. The left end of the connecting rod assembly A is connected to the propulsion unit A, the right end of the connecting rod assembly A is connected to the connecting piece, the left end of the connecting rod assembly B is connected to the connecting piece, and the right end of the connecting rod assembly B is connected to the propulsion unit C. The surface propeller propulsion device of the present utility model can meet the use of a boat with three engines and three propellers, is simple to manufacture, and has a low manufacturing cost. Description of the Drawings

[0017] Figure 1 is a perspective view of the surface propeller propulsion device of the present utility model;

[0018] Figure 2 is Figure 1 An enlarged three-dimensional view of the middle connecting rod assembly A and the connecting rod assembly B;

[0019] Figure 3 is Figure 1 A schematic structural view of the middle connecting rod assembly A;

[0020] Figure 4 is Figure 3 The top view of;

[0021] Figure 5 is Figure 1 A schematic structural view of the middle connecting rod assembly B;

[0022] Figure 6 is Figure 5 The top view of;

[0023] In the figure: 1, stern sealing plate; 2, trim hydraulic cylinder A; 3, steering hydraulic cylinder A; 4, drive device A; 41, connecting flange A; 42, steering mechanism A; 43, stern shaft tube A; 44, shafting A; 45, rudder blade A; 5, connecting rod assembly A; 51, connecting rod A; 52, locking nut A-1; 53, screw rod A-1; 54, connecting pin A-1; 55, fork block A-1; 56, pin shaft A; 57, connecting pin A-2; 58, locking nut A-2; 59, flat key A; 510, locking nut A-3; 511, screw rod A-2; 512, connecting pin A-3; 513, fork block A-2; 514, connecting pin A-4; 6, connecting rod assembly B; 61, connecting rod B; 62, locking nut B-1; 63, screw rod B-1; 64, connecting pin B-1; 65, fork block B-1; 66, pin shaft B; 67, connecting pin B-2; 68, locking nut B-2; 69, flat key B; 610, locking nut B-3; 611, screw rod B-2; 612, connecting pin B-3; 613, fork block B-2; 614, connecting pin B-4; 615, locking nut B-4; 7, steering hydraulic cylinder C; 8, trim hydraulic cylinder C; 9, drive device C; 91, connecting flange C; 92, steering mechanism C; 93, stern shaft tube C; 94, shafting C; 95, rudder blade C; 10, surface propeller A; 11, surface propeller B; 12, surface propeller C; 13, trim hydraulic cylinder B; 14, drive device B; 141, connecting flange B; 142, steering mechanism B; 143, stern shaft tube B; 144, shafting B; 145, rudder blade B; 15, connecting shaft A; 16, connecting shaft B; 17, connecting shaft C; 18, connecting piece. Specific embodiments

[0024] The following further illustrates the present utility model in conjunction with the accompanying drawings and embodiments.

[0025] In conjunction with Figure 1 andFigure 2 As shown together, a surface paddle propulsion device includes a stern seal plate 1, on which three propulsion units are provided, namely propulsion unit A, propulsion unit B, and propulsion unit C from left to right; the surface paddle propulsion device further includes a connecting rod assembly A 5, a connecting rod assembly B 6, and a connecting member 18. The connecting member 18 is installed on the propulsion unit B. The left end of the connecting rod assembly A 5 is connected to the propulsion unit A, the right end of the connecting rod assembly A 5 is connected to the connecting member 18, the left end of the connecting rod assembly B 6 is connected to the connecting member 18, and the right end of the connecting rod assembly B 6 is connected to the propulsion unit C.

[0026] Combined Figure 1 、 Figure 2 、 Figure 3 、and Figure 4 As shown together, the connecting rod assembly A 5 includes a connecting rod A 51. The left end of the connecting rod A 51 is threadedly connected to the right end of a screw A-53, and the connecting rod A 51 and the screw A-53 are locked by a locking nut A-52. The left end of the screw A-53 is connected to the right end of a fork block A-55 through a connecting pin A-54. The left end of the fork block A-55 is connected to a pin shaft A 56 through a connecting pin A-57, and the pin shaft A 56 is connected to the propulsion unit A. The right end of the connecting rod A 51 is threadedly connected to the left end of a screw A-511, and the connecting rod A 51 and the screw A-511 are locked by a locking nut A-510. The right end of the screw A-511 is connected to the left end of a fork block A-513 through a connecting pin A-512. The right end of the fork block A-513 is connected to the left end of the connecting member 18 through a connecting pin A-514.

[0027] The thread directions at both ends of the connecting rod A 51 are opposite, and the overall length of the connecting rod assembly A can be adjusted by adjusting the lengths of the screw A-53 and the screw A-511 screwed into the connecting rod A 51.

[0028] Combined Figure 1 、 Figure 2 、 Figure 5 、and Figure 6 As shown together, the connecting rod assembly B 6 includes a connecting rod B 61. The right end of the connecting rod B 61 is threadedly connected to the left end of a screw B-63, and the connecting rod B 61 and the screw B-63 are locked by a locking nut B-62. The right end of the screw B-63 is connected to the left end of a fork block B-65 through a connecting pin B-64. The right end of the fork block B-65 is connected to a pin shaft B 66 through a connecting pin B-67, and the pin shaft B 66 is connected to the propulsion unit C. The left end of the connecting rod B 61 is threadedly connected to the right end of a screw B-611, and the connecting rod B 61 and the screw B-611 are locked by a locking nut B-610. The left end of the screw B-611 is connected to the right end of a fork block B-613 through a connecting pin B-612. The left end of the fork block B-613 is connected to the right end of the connecting member 18 through a connecting pin B-614.

[0029] The thread directions at both ends of the connecting rod B 61 are opposite, and the overall length of the connecting rod assembly B can be adjusted by adjusting the lengths of the screw rod B-63 and the screw rod B-II 611 screwed into the connecting rod B 61.

[0030] Combined with Figure 1 、 Figure 2 、 Figure 3 、and Figure 4 Collectively shown, the propulsion unit A includes a driving device 4. The driving device 4 includes a connecting flange A 41. One end of the connecting flange A 41 is fixed on the stern seal plate 1, and the other end of the connecting flange A 41 is connected to one end of the steering mechanism A 42. The other end of the steering mechanism A 42 is connected to a stern tube A 43. An input shaft A (not shown in the figure) is arranged inside the connecting flange A 41, and a gearbox A (not shown in the figure) providing power is connected to the input shaft A. A shafting A 44 is arranged inside the stern tube A 43. One end of the shafting A 44 is connected to the input shaft A, and the other end of the shafting A 44 is connected to a surface propeller A10. The propulsion unit A further includes a trimming hydraulic cylinder A 2. One end of the trimming hydraulic cylinder A 2 is rotatably connected to the stern seal plate 1, and the other end of the trimming hydraulic cylinder A 2 is rotatably connected to the stern tube A 43 through a connecting shaft A15. The propulsion unit A further includes a steering hydraulic cylinder A3. One end of the steering hydraulic cylinder A 3 is rotatably connected to the stern seal plate 1, and the other end of the steering hydraulic cylinder A 3 is rotatably connected to the stern tube A 43. A rudder blade A 45 is further arranged on the stern tube A 43.

[0031] Preferably, a pin shaft A 56 is installed on the stern tube A 43. A locking nut A-II 58 is arranged at the left end of the pin shaft A 56, and the pin shaft A 56 is fixed to the stern tube A 43 through the locking nut A-II 58.

[0032] Further preferably, a flat key A 59 is arranged on the pin shaft A 56, which can effectively prevent the relative rotation between the pin shaft A 56 and the stern tube A43.

[0033] Combined with Figure 1 、 Figure 2 、 Figure 5 、and Figure 6As shown together, the propulsion unit C includes a driving device C9, and the driving device C9 includes a connecting flange C91. One end of the connecting flange C91 is fixed on the stern seal plate 1, and the other end of the connecting flange C91 is connected to one end of a steering mechanism C92. The other end of the steering mechanism C92 is connected to a stern tube C93. An input shaft C (not shown in the figure) is arranged inside the connecting flange C91, and a gearbox C (not shown in the figure) that provides power is connected to the input shaft C. A shafting C94 is arranged inside the stern tube C93. One end of the shafting C94 is connected to the input shaft C, and the other end of the shafting C94 is connected to a surface propeller C12. The propulsion unit C further includes a trimming hydraulic cylinder C8. One end of the trimming hydraulic cylinder C8 is rotatably connected to the stern seal plate 1, and the other end of the trimming hydraulic cylinder C8 is rotatably connected to the stern tube C93 through a connecting shaft C17. The propulsion unit C further includes a steering hydraulic cylinder C7. One end of the steering hydraulic cylinder C7 is rotatably connected to the stern seal plate 1, and the other end of the steering hydraulic cylinder C7 is rotatably connected to the stern tube C93. A rudder blade C95 is further arranged on the stern tube C93.

[0034] Preferably, a pin shaft B66 is installed on the stern tube C93. A locking nut B II 68 is arranged at the right end of the pin shaft B66, and the pin shaft B66 is fixed to the stern tube C93 through the locking nut B II 68.

[0035] More preferably, a flat key B69 is arranged on the pin shaft B66.

[0036] Combined Figure 1 and Figure 2 As shown together, the propulsion unit B includes a driving device B14, and the driving device B14 includes a connecting flange B141. One end of the connecting flange B141 is fixed on the stern seal plate 1, and the other end of the connecting flange B141 is connected to one end of a steering mechanism B142. The other end of the steering mechanism B142 is connected to a stern tube B143. An input shaft B (not shown in the figure) is arranged inside the connecting flange B141, and a gearbox B (not shown in the figure) that provides power is connected to the input shaft B. A shafting B144 is arranged inside the stern tube B143. One end of the shafting B144 is connected to the input shaft B, and the other end of the shafting B144 is connected to a surface propeller B11. The propulsion unit B further includes a trimming hydraulic cylinder B13. One end of the trimming hydraulic cylinder B13 is rotatably connected to the stern seal plate 1, and the other end of the trimming hydraulic cylinder B13 is rotatably connected to the stern tube B143 through a connecting shaft B16. A rudder blade B145 is further arranged on the stern tube B143. A connecting member 18 is installed on the stern tube B143, and the connecting member 18 is fixed to the stern tube B143 through a locking nut B IV 615. The locking nut B IV 615 is preferably a four-groove locking nut.

[0037] The technical features named with serial numbers involved in this specification (such as longitudinal tilt hydraulic cylinder A, steering hydraulic cylinder A, drive device A, connecting flange A, steering mechanism A, stern tube A, shafting A, rudder blade A, connecting rod assembly A, connecting rod A, lock nut A1, screw A1, connecting pin A1, fork block A1, pin shaft A, connecting pin A2, lock nut A2, flat key A, lock nut A3, screw A2, connecting pin A3, fork block A2, connecting pin A4, connecting rod assembly B, connecting rod B, lock nut B1, screw B1, connecting pin B1, fork block B1, pin shaft B, connecting pin B2, lock nut B2, flat key B, lock nut B3, screw B2, connecting pin B3, fork block B2, connecting pin B4, lock nut B4, pin shaft B2, steering hydraulic cylinder C, longitudinal tilt hydraulic cylinder C, drive device C, connecting flange A, steering mechanism A, stern tube A, shafting A, rudder blade A, surface propeller A, surface propeller B, surface propeller C, longitudinal tilt hydraulic cylinder B, drive device B, connecting flange B, steering mechanism B, stern tube B, shafting B, rudder blade B, connecting shaft A, connecting shaft B, connecting shaft C, etc.) are only for differentiating each technical feature, and do not represent the positional relationship, installation sequence, working sequence, etc. among the technical features.

[0038] In the description of this specification, it should be understood that the orientation or positional relationship described by "from left to right", "left end", "right end", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model.

[0039] The present utility model is not limited to the above specific embodiments. Those of ordinary skill in the art, starting from the above concepts and without creative labor, can make various transformations, all of which fall within the protection scope of the present utility model.

Claims

1. A surface paddle propulsion device, characterized in that, It includes a stern sealing plate, on which three propulsion units are arranged, namely propulsion unit A, propulsion unit B, and propulsion unit C from left to right; the surface propeller propulsion device also includes link assembly A, link assembly B, and a connecting piece; the connecting piece is installed on the propulsion unit B, the left end of the link assembly A is connected to the propulsion unit A, the right end of the link assembly A is connected to the connecting piece, the left end of the link assembly B is connected to the connecting piece, and the right end of the link assembly B is connected to the propulsion unit C.

2. The surface paddle propulsion device according to claim 1, wherein, The link assembly A includes link A, the left end of the link A is threadedly connected to the right end of screw A1, and the link A and the screw A1 are locked by lock nut A1. The left end of the screw A1 is connected to the right end of fork block A1 through connection pin A1. The left end of the fork block A1 is connected to pin shaft A through connection pin A2, and the pin shaft A is connected to the propulsion unit A; the right end of the link A is threadedly connected to the left end of screw A2, and the link A and the screw A2 are locked by lock nut A3. The right end of the screw A2 is connected to the left end of fork block A2 through connection pin A3, and the right end of the fork block A2 is connected to the left end of the connecting piece through connection pin A4.

3. The surface paddle propulsion device according to claim 2, characterized in that, A flat key A is arranged on the pin shaft A.

4. The surface paddle propulsion device according to claim 3, characterized in that, The link assembly B includes link B, the right end of the link B is threadedly connected to the left end of screw B1, and the link B and the screw B1 are locked by lock nut B1. The right end of the screw B1 is connected to the left end of fork block B1 through connection pin B1. The right end of the fork block B1 is connected to pin shaft B through connection pin B2, and the pin shaft B is connected to the propulsion unit C; the left end of the link B is threadedly connected to the right end of screw B2, and the link B and the screw B2 are locked by lock nut B3. The left end of the screw B2 is connected to the right end of fork block B2 through connection pin B3, and the left end of the fork block B2 is connected to the right end of the connecting piece through connection pin B4.

5. The surface paddle propulsion device according to claim 4, wherein A flat key B is arranged on the pin shaft B.

6. The surface paddle propulsion device according to claim 5, wherein, The propulsion unit A includes connection flange A, one end of the connection flange A is fixed to the stern sealing plate, the other end of the connection flange A is connected to one end of steering mechanism A, and the other end of the steering mechanism A is connected to stern shaft tube A; an input shaft A is arranged inside the connection flange A, and a gearbox A that provides power is connected to the input shaft A; a shafting A is arranged inside the stern shaft tube A, one end of the shafting A is connected to the input shaft A, and the other end of the shafting A is connected to a surface propeller A; the propulsion unit A also includes a trimming hydraulic cylinder A, one end of the trimming hydraulic cylinder A is rotatably connected to the stern sealing plate, and the other end of the trimming hydraulic cylinder A is rotatably connected to the stern shaft tube A; the propulsion unit A also includes a steering hydraulic cylinder A, one end of the steering hydraulic cylinder A is rotatably connected to the stern sealing plate, and the other end of the steering hydraulic cylinder A is rotatably connected to the stern shaft tube A; a rudder blade A is also arranged on the stern shaft tube A.

7. The surface paddle propulsion device according to claim 6, wherein, The pin shaft A is installed on the stern shaft tube A, and a lock nut A2 is arranged at the left end of the pin shaft A.

8. The surface paddle propulsion device according to claim 7, wherein The propulsion unit C includes a connecting flange C, one end of the connecting flange C is fixed to the stern seal plate, the other end of the connecting flange C is connected to one end of the steering mechanism C, and the other end of the steering mechanism C is connected to a stern tube C; an input shaft C is arranged in the connecting flange C, and a gearbox C that provides power is connected to the input shaft C; a shafting C is arranged in the stern tube C, one end of the shafting C is connected to the input shaft C, and the other end of the shafting C is connected to a surface propeller C; the propulsion unit C further includes a trimming hydraulic cylinder C, one end of the trimming hydraulic cylinder C is rotatably connected to the stern seal plate, and the other end of the trimming hydraulic cylinder C is rotatably connected to the stern tube C; the propulsion unit C further includes a steering hydraulic cylinder C, one end of the steering hydraulic cylinder C is rotatably connected to the stern seal plate, and the other end of the steering hydraulic cylinder C is rotatably connected to the stern tube C; a rudder blade C is further arranged on the stern tube C.

9. The surface paddle propulsion device according to claim 8, wherein, The pin shaft B is installed on the stern tube C, and a lock nut B2 is arranged at the right end of the pin shaft B.

10. The surface propeller propulsion device according to claim 9, characterized in that, The propulsion unit B includes a connecting flange B, one end of the connecting flange B is fixed to the stern seal plate, the other end of the connecting flange B is connected to one end of the steering mechanism B, and the other end of the steering mechanism B is connected to a stern tube B; an input shaft B is arranged in the connecting flange B, and a gearbox B that provides power is connected to the input shaft B; a shafting B is arranged in the stern tube B, one end of the shafting B is connected to the input shaft B, and the other end of the shafting B is connected to a surface propeller B; the propulsion unit B further includes a trimming hydraulic cylinder B, one end of the trimming hydraulic cylinder B is rotatably connected to the stern seal plate, and the other end of the trimming hydraulic cylinder B is rotatably connected to the stern tube B; a rudder blade B is further arranged on the stern tube B; the connecting piece is installed on the stern tube B.

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