Marine lateral thruster

Abstract

The utility model discloses a side-pushing type propeller for a ship. The side-pushing type propeller comprises a shell, a driving mechanism, a propeller and a transmission mechanism, the transmission mechanism comprises a transmission shaft which is driven by the driving mechanism to rotate; the driving bevel gear rotates along with the transmission shaft; the first driven bevel gear is meshed with the driving bevel gear; the second driven bevel gear is meshed with the driving bevel gear, and the first driven bevel gear and the second driven bevel gear are driven by the driving bevel gear to rotate in the forward direction and the reverse direction respectively; the forward rotating shaft is driven by the first driven bevel gear to rotate in the forward direction; the reverse rotating shaft rotates reversely under the driving of the second driven bevel gear; the propeller comprises a positive propeller and a negative propeller; the positive propeller is fixedly connected with the left end of the positive rotating shaft and positively rotates along with the positive rotating shaft; and the reverse propeller is fixedly connected with the right end of the reverse rotating shaft and reversely rotates along with the reverse rotating shaft. The power of the utility model is large.

Description

Technical Field

[0001] The utility model relates to a propeller, more specifically a side-thrust propeller for a ship. Background Art

[0002] The power for a ship to move forward on the water comes from a propeller, which is usually installed at the bow or stern. In order to facilitate the turning of the ship, some ships will be equipped with a side-thrust propeller on the hull, which applies a lateral thrust to push the ship, thereby driving the ship to rotate. Existing propellers usually include a driving mechanism and a propeller connected to one end of the driving mechanism. The driving mechanism drives the propeller to rotate, thereby generating thrust. However, the existing propeller structure design is unreasonable and the thrust is small. If a large thrust is required, the size of the driving mechanism and the propeller needs to be increased, resulting in an increase in volume and cost. Utility Model Content

[0003] The utility model provides a marine side-thrust propeller in order to solve the technical problem of unreasonable propeller structure design in the prior art.

[0004] In order to solve the above technical problems, the technical solution adopted by the utility model is to design a marine side-thrust propeller, comprising a housing, a driving mechanism arranged on the housing, and a propeller connected to the driving mechanism and driven to rotate by the driving mechanism, and the marine side-thrust propeller also includes a transmission mechanism arranged between the driving mechanism and the propeller; the transmission mechanism includes:

[0005] A transmission shaft, the upper end of which is connected to the driving mechanism and rotates under the driving of the driving mechanism;

[0006] An active bevel gear, which is fixedly connected to the lower end of the transmission shaft and rotates with the transmission shaft;

[0007] a first driven bevel gear meshing with the driving bevel gear;

[0008] A second driven bevel gear meshing with the active bevel gear, the first driven bevel gear and the second driven bevel gear being arranged opposite to each other and respectively arranged on the left and right sides of the active bevel gear; the first driven bevel gear and the second driven bevel gear respectively rotate forward and reverse under the drive of the active bevel gear;

[0009] A forward rotating shaft, a right end of which is fixedly connected to the first driven bevel gear and rotates forwardly under the drive of the first driven bevel gear;

[0010] A reverse rotating shaft, a left end of which is fixedly connected to the second driven bevel gear and reversely rotates under the drive of the second driven bevel gear;

[0011] The propeller comprises:

[0012] a forward propeller, which is fixedly connected to the left end of the forward rotating shaft and rotates in the forward direction along with the forward rotating shaft;

[0013] The counter-propeller is fixedly connected to the right end of the counter-rotating shaft and rotates in the opposite direction along with the counter-rotating shaft.

[0014] The driving mechanism comprises:

[0015] a drive motor having a rotatable motor output shaft;

[0016] A reducer is connected to the motor output shaft and the transmission shaft, and reduces the rotation speed of the motor output shaft and outputs it to the transmission shaft.

[0017] The driving mechanism further comprises:

[0018] A connecting sleeve, the upper end of which is fixedly connected to the output shaft of the motor;

[0019] A power gear, the upper end of which is fixedly connected to the lower end of the connecting sleeve;

[0020] The reducer comprises:

[0021] A fixing ring, which is fixedly connected to the housing; a hollow deceleration hole is arranged at the center of the fixing ring, and a fixing tooth is arranged on the inner side wall of the deceleration hole; the power gear is inserted into the deceleration hole;

[0022] reduction gears, including at least two reduction gears, which are arranged outside the power gear and located in the reduction hole, and reduction teeth are arranged on the outer surface of the reduction gear, and the reduction teeth of the reduction gears are meshed with the power gear and the fixed teeth;

[0023] A reduction shaft, the upper end of which is fixedly connected to a connecting disk, the connecting disk is connected to the reduction gear and the reduction gear can rotate relative to the connecting disk; the reduction gear is arranged on the outer side of the power gear, and the reduction gear drives the reduction shaft to rotate relative to the fixed ring; the reduction shaft is fixedly connected to the transmission shaft.

[0024] The connecting sleeve comprises:

[0025] An upper sleeve cavity is arranged at the upper end of the connecting sleeve; a concave upper sleeve cavity positioning groove is vertically arranged on the side surface of the upper sleeve cavity;

[0026] A locking groove, which is formed by the upper end surface of the connecting sleeve being recessed downward and laterally passes through both sides of the upper sleeve cavity, and a locking screw hole is provided on the side of the locking groove;

[0027] A recessed shaft positioning groove is provided on the lower end side of the motor output shaft, and the driving mechanism also includes an upper sleeve cavity positioning block, the lower end of the motor output shaft is inserted into the upper sleeve cavity, and the upper sleeve cavity positioning block is clamped in the shaft positioning groove and inserted in the upper sleeve cavity positioning groove; a locking screw passes through the locking screw hole to lock the motor output shaft on the connecting sleeve.

[0028] The reduction shaft and the transmission shaft are fixedly connected via a coupling.

[0029] The marine side-thrust propeller further comprises a duct fixedly connected to the housing; the propeller is arranged in the duct; the housing comprises:

[0030] A fixing seat fixed on the duct;

[0031] A lower shell, which is fixedly connected to the fixing seat and is located below the fixing seat; the driving mechanism is arranged on the fixing seat, and the transmission mechanism is arranged in the lower shell; the lower shell includes a vertically arranged connecting shell, a left shell and a right shell arranged at the lower end of the connecting shell and transversely arranged on the left and right sides of the connecting shell; the connecting shell is provided with a connecting cavity that passes through from top to bottom, and the left shell and the right shell are provided with a transverse cavity that passes through from left to right and communicates with the connecting cavity; the transmission shaft and the active bevel gear are placed in the connecting cavity;

[0032] A left sealing end cover, which is fixedly connected to the left end of the left housing; the left sealing end cover is provided with a left end cover hole penetrating the left sealing end cover; a left sealing ring is provided inside the left sealing end cover;

[0033] A right sealing end cover, which is fixedly connected to the right end of the right housing; the right sealing end cover is provided with a right end cover hole penetrating the right sealing end cover; a right sealing ring is provided inside the right sealing end cover;

[0034] The transmission mechanism also includes:

[0035] A forward fixing sleeve, which is fixed on the left housing; a forward fixing cavity is provided in the center of the forward fixing sleeve;

[0036] A forward support bearing is inserted into the forward fixed cavity; the outer ring of the forward support bearing is fixedly connected to the inner side of the forward fixed cavity; the inner ring of the forward support bearing is fixedly connected to the forward rotating shaft;

[0037] A reverse fixing sleeve, which is fixed on the right housing; a reverse fixing cavity is provided at the center of the reverse fixing sleeve;

[0038] A reverse support bearing is inserted into the reverse fixed cavity; the outer ring of the reverse support bearing is fixedly connected to the inner side of the reverse fixed cavity; the inner ring of the reverse support bearing is fixedly connected to the reverse rotating shaft;

[0039] The first driven bevel gear is fixed to the right end of the forward rotating shaft, the forward supporting bearing is inserted into the forward fixing sleeve, and then the forward rotating shaft fixed with the first driven bevel gear is inserted into the inner ring of the forward supporting bearing, and then the first driven bevel gear is inserted from the transverse cavity of the left housing so that the first driven bevel gear is meshed with the active bevel gear, and the forward fixing sleeve is fixed to the left housing; finally, the left end cover hole of the left sealing end cover is sleeved on the forward rotating shaft from the left end of the forward rotating shaft, and the left end cover hole is sealed by the left sealing ring, and the right end of the left sealing end cover is welded and fixed to the left end of the left housing;

[0040] The second driven bevel gear is fixed to the left end of the reverse rotating shaft, the reverse supporting bearing is inserted into the reverse fixing sleeve, and then the reverse rotating shaft fixed with the second driven bevel gear is inserted into the inner ring of the reverse supporting bearing, and then the second driven bevel gear is inserted from the transverse cavity of the right housing so that the second driven bevel gear is meshed with the active bevel gear, and the reverse fixing sleeve is fixed to the right housing, and finally the right end cover hole of the right sealing end cover is sleeved on the reverse rotating shaft from the right end of the reverse rotating shaft, and the right end cover hole is sealed by the right sealing ring, and the left end of the right sealing end cover is welded and fixed to the right end of the right housing.

[0041] The forward support bearing and the reverse support bearing are both angular contact bearings.

[0042] A first through hole is provided at the center of the first driven bevel gear, and a first gear groove is provided on the side of the first through hole;

[0043] A second through hole is provided at the center of the second driven bevel gear, and a second gear groove is provided on the side of the second through hole;

[0044] The forward rotating axis comprises:

[0045] A first positioning boss protruding from a side surface of the forward rotation axis;

[0046] A first positioning groove, which is provided on the side of the forward rotation axis and is located on the right side of the first positioning boss;

[0047] A first external thread, which is provided on the side of the forward rotation shaft and located on the left side of the first positioning boss;

[0048] A first clamp groove, which is arranged on the left side of the first external thread;

[0049] The counter-rotating shaft comprises:

[0050] a second positioning boss protruding from a side surface of the counter-rotating shaft;

[0051] a second positioning groove, which is provided on the side of the counter-rotating shaft and is located on the left side of the second positioning boss;

[0052] a second external thread, which is provided on the side of the counter-rotating shaft and is located on the right side of the second positioning boss;

[0053] a second clamp groove, which is arranged on the right side of the second external thread;

[0054] The transmission mechanism also includes:

[0055] a first positioning block, which is clamped in the first positioning groove; the first driven bevel gear is sleeved on the forward rotating shaft through the first through hole and the first positioning block is inserted into the first gear groove, and the left end surface of the first driven bevel gear abuts against the right side surface of the first positioning boss;

[0056] A first fixing nut is sleeved on the forward rotating shaft and is threadedly connected to the first external thread, and the forward support bearing is positioned between the first fixing nut and the left side of the first positioning boss; a first fastening groove is provided on the outer side of the first fixing nut and penetrates to the center of the first fixing nut, and a first fastening screw fastens two side surfaces of the first fastening groove;

[0057] A first clamp, which is clamped in the first clamp groove and pressed against the left side of the first fixing nut;

[0058] A second positioning block is clamped in the second positioning groove; the second driven bevel gear is sleeved on the counter-rotating shaft through the second through hole and the second positioning block is inserted into the second gear groove, and the right end surface of the second driven bevel gear abuts against the left side surface of the second positioning boss;

[0059] A second fixing nut is sleeved on the reverse rotating shaft and is threadedly connected with the second external thread, and the reverse support bearing is positioned between the second fixing nut and the right side surface of the second positioning boss; a second fastening groove is provided on the outer side surface of the second fixing nut and penetrates to the center of the second fixing nut, and a second fastening screw fastens two side surfaces of the second fastening groove;

[0060] The second clamp is clamped in the second clamp groove and pressed against the right side of the second fixing nut.

[0061] The forward rotating shaft also includes:

[0062] A first tilting platform, which is disposed on the side of the forward rotation axis and tilted inward from right to left;

[0063] A first fixed thread, which is arranged on the left end side of the forward rotating shaft;

[0064] The counter-rotating shaft further comprises:

[0065] A second tilting platform, which is disposed on the side of the counter-rotating shaft and tilted inward from left to right;

[0066] A second fixing thread, which is provided on the right end side surface of the counter-rotating shaft;

[0067] The positive propeller comprises a first inner slurry, a first outer slurry arranged outside the first inner slurry and fixedly connected to the first inner slurry, and a positive blade arranged outside the first outer slurry; a hollow first slurry hole is arranged at the center of the first inner slurry, a square first slurry cavity is arranged inside the first slurry hole, and a first slurry positioning platform protruding inward is arranged at the left end of the first slurry cavity;

[0068] The reverse propeller comprises a second inner slurry, a second outer slurry arranged outside the second inner slurry and fixedly connected to the second inner slurry, and a reverse blade arranged outside the second outer slurry; a hollow second slurry hole is arranged at the center of the second inner slurry, a square second slurry cavity is arranged inside the second slurry hole, and a second slurry positioning platform protruding inward is arranged at the right end of the second slurry cavity;

[0069] The transmission mechanism also includes:

[0070] a first axial connecting strip, which is disposed on a side of the forward rotating shaft and between the first fixing thread and the first tilting platform, and the first axial connecting strip is disposed along the axial direction of the forward rotating shaft;

[0071] A first connecting sleeve, which has a hollow first set hole, a first inner connecting groove is arranged on the side of the first set hole, a first outer connecting strip is arranged on the outer side of the first connecting sleeve, the first connecting sleeve is sleeved on the forward rotating shaft and the first inner connecting groove is inserted into the first axial connecting strip; a protruding first set platform is arranged at the left end of the first connecting sleeve;

[0072] A first stopper, the center of which is provided with a first stopper hole, the first stopper hole is an inclined hole inclined inward from right to left; and the inclination angle of the first stopper hole is the same as the inclination angle of the first inclined platform; the first stopper is sleeved on the first inclined platform;

[0073] The first sleeve has a first hollow sleeve cavity at its center, a first sleeve groove arranged along the axial direction is arranged on the inner side of the first sleeve cavity, and the outer surface of the first sleeve is square; the first sleeve is sleeved on the first connecting sleeve and the first outer connecting strip is inserted into the first sleeve groove; the first sleeve is inserted into the first slurry cavity and the two ends of the first sleeve are limited to be located between the first slurry positioning platform and the first stopper, and the two ends of the first inner slurry are limited to be located between the first sleeve platform and the first stopper;

[0074] A first locking nut, which is connected to the first fixing thread and is pressed against the left end surface of the first set;

[0075] a second axial connecting strip, which is disposed on a side of the counter-rotating shaft and is located between the second fixing thread and the second tilting platform, and the second axial connecting strip is disposed along the axial direction of the counter-rotating shaft;

[0076] A second connecting sleeve, which has a hollow second set of holes, a second inner connecting groove is provided on the side of the second set of holes, a second outer connecting strip is provided on the outer side of the second connecting sleeve, the second connecting sleeve is sleeved on the counter-rotating shaft and the second inner connecting groove is inserted into the second axial connecting strip; a protruding second set platform is provided at the right end of the second connecting sleeve;

[0077] A second stopper, the center of which is provided with a second stopper hole, the second stopper hole is an inclined hole inclined inward from left to right; and the inclination angle of the second stopper hole is the same as the inclination angle of the second inclined platform; the second stopper is sleeved on the second inclined platform;

[0078] The second sleeve has a hollow second sleeve cavity at its center, a second sleeve groove arranged along the axial direction is arranged on the inner side of the second sleeve cavity, and the outer surface of the second sleeve is square; the second sleeve is sleeved on the second connecting sleeve and the second outer connecting strip is inserted into the second sleeve groove; the second sleeve is inserted into the second slurry cavity and the two ends of the second sleeve are limited to be located between the second slurry positioning platform and the second stopper, and the two ends of the second inner slurry are limited to be located between the second sleeve platform and the second stopper;

[0079] A second locking nut is connected to the second fixing thread and pressed against the right end surface of the second platform.

[0080] The forward rotation axis and the reverse rotation axis are perpendicular to the transmission shaft.

[0081] The utility model is provided with a driving mechanism, a propeller and a transmission mechanism, wherein the transmission mechanism comprises a transmission shaft, an active bevel gear, a first driven bevel gear, a second driven bevel gear, a forward rotating shaft and a reverse rotating shaft; and the propeller comprises a forward propeller and a reverse propeller. The transmission shaft rotates under the drive of the driving mechanism, the active bevel gear is fixedly connected to the lower end of the transmission shaft and rotates with the transmission shaft, the first driven bevel gear is meshed with the active bevel gear; the second driven bevel gear is meshed with the active bevel gear, the first driven bevel gear and the second driven bevel gear are arranged opposite to each other and are respectively arranged on the left and right sides of the active bevel gear, the first driven bevel gear and the second driven bevel gear rotate forward and reversely respectively under the drive of the active bevel gear, the right end of the forward rotating shaft is fixedly connected to the first driven bevel gear and rotates forwardly under the drive of the first driven bevel gear, the left end of the reverse rotating shaft is fixedly connected to the second driven bevel gear and rotates reversely under the drive of the second driven bevel gear, the forward propeller is fixedly connected to the left end of the forward rotating shaft and rotates forwardly with the forward rotating shaft, and the reverse propeller is fixedly connected to the right end of the reverse rotating shaft and rotates reversely with the reverse rotating shaft. Therefore, under the drive of the driving mechanism, the positive propeller and the counter-propeller can rotate in opposite directions, and the positive propeller and the counter-propeller can generate thrust in the same direction. Compared with the existing technology, the structure is more compact and reasonable, the thrust is greater, the volume is smaller, and the cost is lower. BRIEF DESCRIPTION OF THE DRAWINGS

[0082] The present invention is described in detail below with reference to the embodiments and drawings, wherein:

[0083] Figure 1 It is a structural diagram of the utility model marine side-thrust propeller;

[0084] Figure 2 It is a vertical cross-sectional view of the utility model marine side-thrust propeller;

[0085] Figure 3 It is a cross-sectional view of the transmission mechanism of the utility model marine side-thrust propeller;

[0086] Figure 4 It is a structural diagram of the reducer of the utility model marine side thruster;

[0087] Figure 5 It is a structural diagram of the driving motor and the upper sleeve cavity positioning block of the marine side thruster of the utility model;

[0088] Figure 6 This is a structural diagram of a connecting shell of a marine side-thrust propeller of the utility model;

[0089] Figure 7 It is a structural diagram of the transmission mechanism of the utility model marine side-thrust propeller;

[0090] Figure 8 It is an exploded view of the first driven bevel gear and its left half of the transmission mechanism of the marine side-thrust propeller of the utility model;

[0091] Fig. 9 It is a structural diagram of the first sleeve of the utility model;

[0092] Fig.10 It is an exploded view of the second driven bevel gear and its right half of the transmission mechanism of the marine side-thrust propeller of the utility model;

[0093] Fig.11 It is a structural diagram of the counter-propeller of the utility model. DETAILED DESCRIPTION

[0094] The specific implementation of the present invention is further described below in conjunction with the accompanying drawings:

[0095] Please also see Figures 1 to 11 The utility model of the marine side thruster comprises a housing 1, a driving mechanism 2, a propeller 3, a transmission mechanism 4 and a duct 9. Among them:

[0096] The duct 9 is fixedly connected to the housing 1. The propeller 3 is arranged in the duct. The propeller is arranged in the duct, so that when the propeller rotates, the duct is used to limit the water flow, and the thrust generated is greater.

[0097] The driving mechanism 2 is arranged on the housing, and is mainly used to provide power to drive the propeller to rotate.

[0098] The propeller 31 is connected to the driving mechanism and rotates under the driving of the driving mechanism. The propeller 31 includes a forward propeller 31 and a reverse propeller 32 .

[0099] The positive propeller 31 includes a first inner slurry 311, a first outer slurry 312 arranged on the outside of the first inner slurry and fixedly connected to the first inner slurry, and a positive blade 313 arranged on the outside of the first outer slurry; a hollow first slurry hole 3111 is arranged at the center of the first inner slurry, a square first slurry cavity 3112 is arranged on the inner side of the first slurry hole, and a first slurry positioning platform 3113 protruding inward is arranged at the left end of the first slurry cavity.

[0100] The reverse propeller 32 includes a second inner slurry 321, a second outer slurry 322 arranged on the outside of the second inner slurry and fixedly connected to the second inner slurry, and a reverse blade 323 arranged on the outside of the second outer slurry; a hollow second slurry hole 3211 is arranged at the center of the second inner slurry, a square second slurry cavity 3212 is arranged on the inner side of the second slurry hole, and a second slurry positioning platform 3213 protruding inward is arranged at the right end of the second slurry cavity.

[0101] The transmission mechanism 4 is arranged between the driving mechanism and the propeller. The transmission mechanism is mainly used to transmit the power of the driving mechanism to the propeller, thereby driving the propeller to rotate. In this specific embodiment, the transmission mechanism 4 includes a transmission shaft 41, a driving bevel gear 42, a first driven bevel gear 43, a second driven bevel gear 44, a forward rotation shaft 45 and a reverse rotation shaft 46.

[0102] in:

[0103] The upper end of the transmission shaft 41 is connected to the driving mechanism and rotates under the driving of the driving mechanism.

[0104] The driving bevel gear 42 is fixedly connected to the lower end of the transmission shaft and rotates along with the transmission shaft.

[0105] The first driven bevel gear 43 meshes with the driving bevel gear.

[0106] The second driven bevel gear 44 meshes with the active bevel gear. The first driven bevel gear and the second driven bevel gear are arranged opposite to each other and are respectively arranged on the left and right sides of the active bevel gear. The first driven bevel gear and the second driven bevel gear rotate forward and reverse respectively under the drive of the active bevel gear.

[0107] The right end of the forward rotating shaft 45 is fixedly connected to the first driven bevel gear and rotates forwardly under the drive of the first driven bevel gear.

[0108] The left end of the reverse rotation shaft 46 is fixedly connected to the second driven bevel gear and rotates in the reverse direction under the drive of the second driven bevel gear. In this specific embodiment, the forward rotation shaft and the reverse rotation shaft are perpendicular to the transmission shaft.

[0109] The forward propeller 31 is fixedly connected to the left end of the forward rotating shaft and rotates in the forward direction along with the forward rotating shaft.

[0110] The counter-propeller 32 is fixedly connected to the right end of the counter-rotating shaft and rotates in the opposite direction along with the counter-rotating shaft.

[0111] Driven by the driving mechanism, the positive propeller and the counter-propeller rotate in opposite directions, and the positive propeller and the counter-propeller generate thrust in the same direction. Compared with the existing technology, the structure is more compact and reasonable, the thrust is greater, the volume is smaller, and the cost is lower.

[0112] The driving mechanism may be hydraulically driven, motor driven, etc. In this specific embodiment, the driving mechanism 2 includes a driving motor 21 and a reducer 22. Among them:

[0113] The driving motor 21 has a rotatable motor output shaft 211 .

[0114] The reducer 22 is connected to the motor output shaft 211 and the transmission shaft 41, and reduces the rotation speed of the motor output shaft and outputs it to the transmission shaft. The rotation speed of the transmission shaft can be reduced by the reducer.

[0115] In this specific embodiment, the driving mechanism 2 further includes a connecting sleeve 23 and a power gear 24. Wherein:

[0116] The upper end of the connecting sleeve 23 is fixedly connected to the motor output shaft. The connecting sleeve 23 is mainly used to connect the motor output shaft and the power gear.

[0117] The upper end of the power gear 24 is fixedly connected to the lower end of the connecting sleeve. The power gear is used to transmit the rotation of the motor output shaft to the reducer.

[0118] The reducer 22 includes a fixing ring 221, a reduction gear 222 and a reduction shaft 223. Wherein:

[0119] The fixing ring 221 is fixedly connected to the housing; a hollow speed reduction hole 2211 is provided at the center of the fixing ring 221, and a fixing tooth 2212 is provided on the inner side wall of the speed reduction hole; and the power gear is inserted into the speed reduction hole.

[0120] The reduction gears 222 include at least two, and the reduction gears are arranged outside the power gear and located in the reduction hole. The outer surface of the reduction gear 222 is provided with reduction teeth 2221, and the reduction teeth of the reduction gears are meshed with the power gear and the fixed teeth. In this specific embodiment, the reduction gears include four.

[0121] The upper end of the reduction shaft 223 is fixedly connected with a connecting disk 2231, the connecting disk is connected to the reduction gear and the reduction gear can rotate relative to the connecting disk; the reduction gear is arranged on the outer side of the power gear, and the reduction gear drives the reduction shaft to rotate relative to the fixed ring; the reduction shaft is fixedly connected to the transmission shaft. In this specific embodiment, the reduction gear is connected to the connecting disk through a rotating shaft, so that the reduction gear can rotate relative to the connecting disk.

[0122] The structure of the reducer can be made more compact by arranging the fixing ring, the reduction gear and the reduction shaft.

[0123] In this specific embodiment, the connecting sleeve 23 includes an upper sleeve cavity 231 and a locking groove 232. Wherein:

[0124] The upper sleeve cavity 231 is arranged at the upper end of the connecting sleeve; a concave upper sleeve cavity positioning groove 2311 is vertically arranged on the side surface of the upper sleeve cavity.

[0125] The locking groove 232 is formed by the upper end surface of the connecting sleeve being recessed downward and runs through both sides of the upper sleeve cavity transversely. The side surface of the locking groove 232 is provided with a locking screw hole.

[0126] The lower end side surface of the motor output shaft 211 is provided with a recessed shaft positioning groove 2111, and the driving mechanism 2 also includes an upper sleeve cavity positioning block 25, the lower end of the motor output shaft 211 is inserted into the upper sleeve cavity 231, and the upper sleeve cavity positioning block 25 is stuck in the shaft positioning groove and inserted in the upper sleeve cavity positioning groove 2311; the locking screw 2321 passes through the locking screw hole to lock the motor output shaft on the connecting sleeve.

[0127] By providing the shaft positioning groove 2111, the upper sleeve cavity positioning block 25 and the upper sleeve cavity positioning groove 2311, quick installation can be achieved. At the same time, by providing the locking groove, the motor output shaft is locked on the connecting sleeve by passing the locking screw through the locking screw hole.

[0128] In this specific embodiment, the reduction shaft 223 is fixedly connected to the transmission shaft 41 via a coupling 224. The reduction shaft is provided mainly to facilitate the manufacture of the reducer. The reduction shaft is usually relatively short, and it is not convenient to manufacture and install if it is too long. Of course, the reduction shaft may not be provided, and the transmission shaft and the reduction shaft may be integrated.

[0129] In this specific embodiment, the housing 1 includes a fixing base 11, a lower housing 12, a left sealing end cover 13 and a right sealing end cover 14. Among them:

[0130] The fixing seat 11 is fixed on the duct. The fixing seat is mainly used to fix the propeller, and the fixing seat can be fixed on the duct by screws.

[0131] The lower shell 12 is fixedly connected to the fixing seat and is located below the fixing seat. The driving mechanism 2 is arranged on the fixing seat, and the transmission mechanism 2 is arranged in the lower shell. The lower shell 12 includes a vertically arranged connecting shell 121, a left shell 122 and a right shell 123 which are arranged at the lower end of the connecting shell and are laterally arranged on the left and right sides of the connecting shell. The connecting shell 121 is provided with a connecting cavity 1211 which passes through from top to bottom, and the left shell 122 and the right shell 123 are provided with a transverse cavity 1221 which passes through from left to right and is connected to the connecting cavity; the transmission shaft and the active bevel gear are placed in the connecting cavity. In this specific embodiment, the left and right sides of the connecting shell are both conical in shape with a small front and a wide rear, so as to reduce the impact of water flow on the connecting shell.

[0132] The left sealing end cover 13 is fixedly connected to the left end of the left housing; the left sealing end cover is provided with a left end cover hole 131 penetrating the left sealing end cover; and a left sealing ring 132 is provided inside the left sealing end cover.

[0133] The right sealing end cover 14 is fixedly connected to the right end of the right shell; the right sealing end cover is provided with a right end cover hole 141 penetrating the right sealing end cover; the right sealing end cover is provided with a right sealing ring 142. The left sealing ring and the right sealing ring are mainly used for sealing to prevent water from entering the lower shell.

[0134] The transmission mechanism 4 further includes a forward fixing sleeve 51, a forward supporting bearing 52, a reverse fixing sleeve 53 and a reverse supporting bearing 54. Wherein:

[0135] The forward fixing sleeve 51 is fixed on the left housing; a forward fixing cavity 511 is arranged at the center of the forward fixing sleeve.

[0136] The forward support bearing 52 is inserted into the forward fixed cavity; the outer ring of the forward support bearing is fixedly connected to the inner side surface of the forward fixed cavity; the inner ring of the forward support bearing is fixedly connected to the forward rotating shaft.

[0137] The reverse fixing sleeve 53 is fixed on the right housing; a reverse fixing cavity 531 is provided at the center of the reverse fixing sleeve.

[0138] The reverse support bearing 54 is inserted into the reverse fixed cavity; the outer ring of the reverse support bearing is fixedly connected to the inner side surface of the reverse fixed cavity; the inner ring of the reverse support bearing is fixedly connected to the reverse rotating shaft.

[0139] The first driven bevel gear is fixed to the right end of the forward rotating shaft, the forward supporting bearing is inserted into the forward fixing sleeve, and then the forward rotating shaft fixed with the first driven bevel gear is inserted into the inner ring of the forward supporting bearing, and then the first driven bevel gear is inserted from the transverse cavity of the left housing so that the first driven bevel gear is meshed with the active bevel gear, and the forward fixing sleeve is fixed to the left housing; finally, the left end cover hole of the left sealing end cover is sleeved on the forward rotating shaft from the left end of the forward rotating shaft, and the left end cover hole is sealed by the left sealing ring, and the right end of the left sealing end cover is welded and fixed to the left end of the left housing.

[0140] The second driven bevel gear is fixed to the left end of the reverse rotating shaft, the reverse supporting bearing is inserted into the reverse fixing sleeve, and then the reverse rotating shaft fixed with the second driven bevel gear is inserted into the inner ring of the reverse supporting bearing, and then the second driven bevel gear is inserted from the transverse cavity of the right housing so that the second driven bevel gear is meshed with the active bevel gear, and the reverse fixing sleeve is fixed to the right housing, and finally the right end cover hole of the right sealing end cover is sleeved on the reverse rotating shaft from the right end of the reverse rotating shaft, and the right end cover hole is sealed by the right sealing ring, and the left end of the right sealing end cover is welded and fixed to the right end of the right housing.

[0141] By first installing the first driven bevel gear on the forward rotating shaft, inserting the forward support bearing into the forward fixed sleeve, and then inserting the forward rotating shaft into the inner ring of the forward support bearing, and then meshing the first driven bevel gear with the active bevel gear, and fixing the forward fixed sleeve on the left housing, and finally installing the left sealing end cover and welding the left sealing end cover around the left housing, not only is the installation more convenient, but the connection is more firm and the sealing is better.

[0142] Similarly, by first installing the second driven bevel gear on the reverse rotating shaft, inserting the reverse support bearing into the reverse fixed sleeve, and then inserting the reverse rotating shaft into the inner ring of the reverse support bearing, and then meshing the second driven bevel gear with the active bevel gear, and fixing the reverse fixed sleeve on the right housing, and finally installing the right sealing end cover and welding the four sides of the right sealing end cover to the four sides of the right housing, not only is the installation more convenient, but the connection is also more firm and the sealing is better.

[0143] In this specific embodiment, the forward support bearing and the reverse support bearing are both angular contact bearings, so as to better withstand radial and axial impact forces.

[0144] In this specific embodiment, a first through hole 431 is disposed at the center of the first driven bevel gear 43 , and a first gear groove 432 is disposed on a side surface of the first through hole.

[0145] A second through hole 441 is disposed at the center of the second driven bevel gear 44 , and a second gear groove 442 is disposed on a side surface of the second through hole.

[0146] The forward rotation shaft 45 includes a first positioning boss 451, a first positioning groove 452, a first external thread 453, a first clamp groove 454, a first tilting platform 455, and a first fixing thread 456. Wherein:

[0147] The first positioning boss 451 protrudes from the side surface of the forward rotation shaft.

[0148] The first positioning groove 452 is disposed on the side of the forward rotation axis and is located on the right side of the first positioning boss.

[0149] The first external thread 453 is disposed on the side of the forward rotation shaft and is located on the left side of the first positioning boss.

[0150] The first clamp groove 454 is disposed on the left side of the first external thread.

[0151] The first tilting platform 455 is disposed on the side of the forward rotation axis and tilts inward from right to left.

[0152] The first fixing thread 456 is disposed on the left end side of the forward rotating shaft.

[0153] The reverse rotation shaft 46 includes a second positioning boss 461, a second positioning groove 462, a second external thread 463, a second clamp groove 464, a second tilting platform 465, and a second fixing thread 466.

[0154] The second positioning boss 461 protrudes from the side surface of the counter-rotating shaft.

[0155] The second positioning groove 462 is disposed on the side of the reverse rotation shaft and is located on the left side of the second positioning boss.

[0156] The second external thread 463 is disposed on the side of the counter-rotating shaft and is located on the right side of the second positioning boss.

[0157] The second clamp groove 464 is disposed on the right side of the second external thread.

[0158] The second tilting platform 465 is disposed on a side of the reverse rotation shaft and tilts inward from left to right.

[0159] The second fixing thread 466 is disposed on the right end side surface of the reverse rotating shaft.

[0160] The transmission mechanism 4 further includes a first positioning block 61, a first fixing nut 62, a first clamp 63, a first axial connecting strip 64, a first connecting sleeve 65, a first stopper 66, a first sleeve 67, a first locking nut 68, a second positioning block 71, a second fixing nut 72, a second clamp 73, a second axial connecting strip 74, a second connecting sleeve 75, a second stopper 76, a second sleeve 77, and a second locking nut 78. Among them:

[0161] The first positioning block 61 is stuck in the first positioning groove 452; the first driven bevel gear 43 is sleeved on the forward rotating shaft 45 through the first through hole 431 and the first positioning block 61 is inserted into the first gear groove 432, and the left end face of the first driven bevel gear 43 abuts against the right side face of the first positioning boss 451.

[0162] The first fixing nut 62 is sleeved on the forward rotating shaft 45 and is threadedly connected with the first external thread 453. The forward support bearing 52 is positioned between the first fixing nut 62 and the left side of the first positioning boss 451. The outer side of the first fixing nut 62 is provided with a first fastening groove 621 penetrating to the center of the first fixing nut 62. The first fastening screw (not shown in the figure) fastens the two side surfaces of the first fastening groove. The first fastening screw deforms the two side surfaces of the first fastening groove, so that the connection between the first fixing nut and the first external thread is more secure.

[0163] The first clamp 63 is clamped in the first clamp groove 454 and pressed against the left side of the first fixing nut. The first clamp is used to prevent the first fixing nut from loosening.

[0164] The second positioning block 71 is stuck in the second positioning groove 462; the second driven bevel gear 44 is sleeved on the reverse rotating shaft 46 through the second through hole 441 and the second positioning block 71 is inserted into the second gear groove 442, and the right end face of the second driven bevel gear 44 abuts against the left side face of the second positioning boss 461.

[0165] The second fixing nut 72 is sleeved on the reverse rotating shaft 46 and is threadedly connected with the second external thread 463. The reverse supporting bearing 54 is positioned between the second fixing nut 72 and the right side of the second positioning boss 461. The outer side of the second fixing nut 72 is provided with a second fastening groove 721 penetrating to the center of the second fixing nut. The second fastening screw (not shown) fastens the two side surfaces of the second fastening groove. The second fastening screw deforms the two side surfaces of the second fastening groove, so that the connection between the second fixing nut and the second external thread is more secure.

[0166] The second clamp 73 is clamped in the second clamp groove 464 and pressed against the right side of the second fixing nut. The second clamp is used to prevent the second fixing nut from loosening.

[0167] The first axial connection bar 64 is disposed on the side of the forward rotation shaft 45 and is located between the first fixing thread 456 and the first tilting platform 455 . The first axial connection bar is disposed along the axial direction of the forward rotation shaft.

[0168] The first connecting sleeve 65 has a hollow first set hole 651, the side of the first set hole is provided with a first inner connecting groove 652, the outer side surface of the first connecting sleeve is provided with a first outer connecting strip 653, the first connecting sleeve is sleeved on the forward rotating shaft and the first inner connecting groove is inserted into the first axial connecting strip; the left end of the first connecting sleeve is provided with a protruding first set platform 654.

[0169] The first stopper 66 is provided with a first stopper hole 661 at its center, and the first stopper hole is an inclined hole inclined inward from right to left; and the inclination angle of the first stopper hole is the same as the inclination angle of the first inclined platform; the first stopper 66 is sleeved on the first inclined platform 455. The first stopper hole and the first inclined platform are arranged obliquely, which can effectively disperse the axial force of the water on the forward rotating shaft of the forward propeller when it is working.

[0170] The first sleeve 67 is provided with a hollow first sleeve cavity 671 at its center, and a first sleeve groove 672 is provided in the axial direction on the inner side of the first sleeve cavity. The outer surface of the first sleeve is square; the first sleeve is sleeved on the first connecting sleeve and the first outer connecting strip is inserted into the first sleeve groove. The first sleeve 66 is inserted into the first slurry cavity 3112 and the two ends of the first sleeve are limited to be located between the first slurry positioning platform 3113 and the first stopper 66, and the two ends of the first inner slurry 311 are limited to be located between the first sleeve platform and the first stopper.

[0171] The first locking nut 68 is connected to the first fixing thread and pressed against the left end surface of the first platform.

[0172] By arranging the first axial connecting strip, the first connecting sleeve, the first stopper, the first sleeve and the first locking nut, the forward propeller can be conveniently and quickly installed and fixed on the forward rotating shaft.

[0173] The second axial connection bar 74 is disposed on the side of the reverse-rotating shaft 46 and between the second fixing thread 466 and the second inclined platform 465 . The second axial connection bar is disposed along the axial direction of the reverse-rotating shaft.

[0174] The second connecting sleeve 75 has a hollow second set hole 751, the side of the second set hole is provided with a second inner connecting groove 752, the outer side surface of the second connecting sleeve is provided with a second outer connecting strip 753, the second connecting sleeve is sleeved on the reverse rotating shaft and the second inner connecting groove is inserted into the second axial connecting strip; the right end of the second connecting sleeve is provided with a protruding second set platform 754.

[0175] The second block 76 is provided with a second block hole 761 at its center, and the second block hole is an inclined hole inclined inward from left to right; and the inclination angle of the second block hole is the same as the inclination angle of the second inclined platform; the second block is sleeved on the second inclined platform 465. The second block hole and the second inclined platform are arranged obliquely, which can effectively disperse the axial force of water on the counter-rotating shaft when the counter-propeller is working.

[0176] The second sleeve 77 is provided with a hollow second sleeve cavity 771 at its center, and a second sleeve groove 772 is provided in the axial direction on the inner side of the second sleeve cavity. The outer surface of the second sleeve is square; the second sleeve is sleeved on the second connecting sleeve and the second outer connecting strip is inserted into the second sleeve groove. The second sleeve 77 is inserted into the second slurry cavity 3212 and the two ends of the second sleeve are limited to be located between the second slurry positioning platform 3213 and the second stopper 76, and the two ends of the second inner slurry 321 are limited to be located between the second sleeve platform and the second stopper.

[0177] The second locking nut 78 is connected to the second fixing thread and pressed against the right end surface of the second platform.

[0178] A duct hole is provided at the upper end of the duct 9. During installation, the transmission mechanism and propeller are first installed with the lower shell, the left sealing end cover and the right sealing end cover to form an underwater assembly. The installed underwater assembly is then placed in the duct so that the upper end of the transmission shaft extends out of the duct hole. The coupling is then installed at the upper end of the transmission shaft. The underwater assembly is then fixed to the duct with bolts, and then the reducer and the drive motor are installed.

[0179] The utility model is provided with a driving mechanism, a propeller and a transmission mechanism, wherein the transmission mechanism comprises a transmission shaft, an active bevel gear, a first driven bevel gear, a second driven bevel gear, a forward rotating shaft and a reverse rotating shaft; and the propeller comprises a forward propeller and a reverse propeller. The transmission shaft rotates under the drive of the driving mechanism, the active bevel gear is fixedly connected to the lower end of the transmission shaft and rotates with the transmission shaft, the first driven bevel gear is meshed with the active bevel gear; the second driven bevel gear is meshed with the active bevel gear, the first driven bevel gear and the second driven bevel gear are arranged opposite to each other and are respectively arranged on the left and right sides of the active bevel gear, the first driven bevel gear and the second driven bevel gear rotate forward and reversely respectively under the drive of the active bevel gear, the right end of the forward rotating shaft is fixedly connected to the first driven bevel gear and rotates forwardly under the drive of the first driven bevel gear, the left end of the reverse rotating shaft is fixedly connected to the second driven bevel gear and rotates reversely under the drive of the second driven bevel gear, the forward propeller is fixedly connected to the left end of the forward rotating shaft and rotates forwardly with the forward rotating shaft, and the reverse propeller is fixedly connected to the right end of the reverse rotating shaft and rotates reversely with the reverse rotating shaft. Therefore, under the drive of the driving mechanism, the positive propeller and the counter-propeller can rotate in opposite directions, and the positive propeller and the counter-propeller can generate thrust in the same direction. Compared with the existing technology, the structure is more compact and reasonable, the thrust is greater, the volume is smaller, and the cost is lower.

[0180] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A marine side-thrust propeller, comprising a housing, a driving mechanism disposed on the housing, and a propeller connected to the driving mechanism and driven to rotate by the driving mechanism, characterized in that: The marine side-thrust propeller further includes a transmission mechanism disposed between the driving mechanism and the propeller; the transmission mechanism includes: A transmission shaft, the upper end of which is connected to the driving mechanism and rotates under the driving of the driving mechanism; An active bevel gear, which is fixedly connected to the lower end of the transmission shaft and rotates with the transmission shaft; a first driven bevel gear meshing with the driving bevel gear; A second driven bevel gear meshing with the active bevel gear, the first driven bevel gear and the second driven bevel gear being arranged opposite to each other and respectively arranged on the left and right sides of the active bevel gear; the first driven bevel gear and the second driven bevel gear respectively rotate forward and reverse under the drive of the active bevel gear; A forward rotating shaft, a right end of which is fixedly connected to the first driven bevel gear and rotates forwardly under the drive of the first driven bevel gear; A reverse rotating shaft, a left end of which is fixedly connected to the second driven bevel gear and reversely rotates under the drive of the second driven bevel gear; The propeller comprises: a forward propeller, which is fixedly connected to the left end of the forward rotating shaft and rotates in the forward direction along with the forward rotating shaft; The counter-propeller is fixedly connected to the right end of the counter-rotating shaft and rotates in the opposite direction along with the counter-rotating shaft.

2. The marine side thruster according to claim 1, characterized in that: The driving mechanism comprises: a drive motor having a rotatable motor output shaft; A reducer is connected to the motor output shaft and the transmission shaft, and reduces the rotation speed of the motor output shaft and outputs it to the transmission shaft.

3. The marine side thruster according to claim 2, characterized in that: The driving mechanism further comprises: A connecting sleeve, the upper end of which is fixedly connected to the output shaft of the motor; A power gear, the upper end of which is fixedly connected to the lower end of the connecting sleeve; The reducer comprises: A fixing ring, which is fixedly connected to the housing; a hollow deceleration hole is arranged at the center of the fixing ring, and a fixing tooth is arranged on the inner side wall of the deceleration hole; the power gear is inserted into the deceleration hole; reduction gears, including at least two reduction gears, which are arranged outside the power gear and located in the reduction hole, and reduction teeth are arranged on the outer surface of the reduction gear, and the reduction teeth of the reduction gears are meshed with the power gear and the fixed teeth; A reduction shaft, the upper end of which is fixedly connected to a connecting disk, the connecting disk is connected to the reduction gear and the reduction gear can rotate relative to the connecting disk; the reduction gear is arranged on the outer side of the power gear, and the reduction gear drives the reduction shaft to rotate relative to the fixed ring; the reduction shaft is fixedly connected to the transmission shaft.

4. The marine side thruster according to claim 3, characterized in that: The connecting sleeve comprises: An upper sleeve cavity is arranged at the upper end of the connecting sleeve; a concave upper sleeve cavity positioning groove is vertically arranged on the side surface of the upper sleeve cavity; A locking groove, which is formed by the upper end surface of the connecting sleeve being recessed downward and laterally passes through both sides of the upper sleeve cavity, and a locking screw hole is provided on the side of the locking groove; A recessed shaft positioning groove is provided on the lower end side of the motor output shaft, and the driving mechanism also includes an upper sleeve cavity positioning block, the lower end of the motor output shaft is inserted into the upper sleeve cavity, and the upper sleeve cavity positioning block is clamped in the shaft positioning groove and inserted in the upper sleeve cavity positioning groove; a locking screw passes through the locking screw hole to lock the motor output shaft on the connecting sleeve.

5. The marine side thruster according to claim 4, characterized in that: The reduction shaft and the transmission shaft are fixedly connected via a coupling.

6. The marine side thruster according to claim 1, characterized in that: The marine side-thrust propeller further includes a duct fixedly connected to the shell; The propeller is arranged in the duct; the housing comprises: A fixing seat fixed on the duct; A lower shell, which is fixedly connected to the fixing seat and is located below the fixing seat; the driving mechanism is arranged on the fixing seat, and the transmission mechanism is arranged in the lower shell; the lower shell includes a vertically arranged connecting shell, a left shell and a right shell arranged at the lower end of the connecting shell and transversely arranged on the left and right sides of the connecting shell; the connecting shell is provided with a connecting cavity that passes through from top to bottom, and the left shell and the right shell are provided with a transverse cavity that passes through from left to right and communicates with the connecting cavity; the transmission shaft and the active bevel gear are placed in the connecting cavity; A left sealing end cover, which is fixedly connected to the left end of the left housing; the left sealing end cover is provided with a left end cover hole penetrating the left sealing end cover; a left sealing ring is provided inside the left sealing end cover; A right sealing end cover, which is fixedly connected to the right end of the right housing; the right sealing end cover is provided with a right end cover hole penetrating the right sealing end cover; a right sealing ring is provided inside the right sealing end cover; The transmission mechanism also includes: A forward fixing sleeve, which is fixed on the left housing; a forward fixing cavity is provided in the center of the forward fixing sleeve; A forward support bearing is inserted into the forward fixed cavity; the outer ring of the forward support bearing is fixedly connected to the inner side of the forward fixed cavity; the inner ring of the forward support bearing is fixedly connected to the forward rotating shaft; A reverse fixing sleeve, which is fixed on the right housing; a reverse fixing cavity is provided at the center of the reverse fixing sleeve; A reverse support bearing is inserted into the reverse fixed cavity; the outer ring of the reverse support bearing is fixedly connected to the inner side of the reverse fixed cavity; the inner ring of the reverse support bearing is fixedly connected to the reverse rotating shaft; The first driven bevel gear is fixed to the right end of the forward rotating shaft, the forward supporting bearing is inserted into the forward fixing sleeve, and then the forward rotating shaft fixed with the first driven bevel gear is inserted into the inner ring of the forward supporting bearing, and then the first driven bevel gear is inserted from the transverse cavity of the left housing so that the first driven bevel gear is meshed with the active bevel gear, and the forward fixing sleeve is fixed to the left housing; finally, the left end cover hole of the left sealing end cover is sleeved on the forward rotating shaft from the left end of the forward rotating shaft, and the left end cover hole is sealed by the left sealing ring, and the right end of the left sealing end cover is welded and fixed to the left end of the left housing; The second driven bevel gear is fixed to the left end of the reverse rotating shaft, the reverse supporting bearing is inserted into the reverse fixing sleeve, and then the reverse rotating shaft fixed with the second driven bevel gear is inserted into the inner ring of the reverse supporting bearing, and then the second driven bevel gear is inserted from the transverse cavity of the right housing so that the second driven bevel gear is meshed with the active bevel gear, and the reverse fixing sleeve is fixed to the right housing, and finally the right end cover hole of the right sealing end cover is sleeved on the reverse rotating shaft from the right end of the reverse rotating shaft, and the right end cover hole is sealed by the right sealing ring, and the left end of the right sealing end cover is welded and fixed to the right end of the right housing.

7. The marine side thruster according to claim 6, characterized in that: The forward support bearing and the reverse support bearing are both angular contact bearings.

8. The marine side thruster according to claim 7, characterized in that: A first through hole is provided at the center of the first driven bevel gear, and a first gear groove is provided on the side of the first through hole; A second through hole is provided at the center of the second driven bevel gear, and a second gear groove is provided on the side of the second through hole; The forward rotating axis comprises: A first positioning boss protruding from a side surface of the forward rotation axis; A first positioning groove, which is provided on the side of the forward rotation axis and is located on the right side of the first positioning boss; A first external thread, which is provided on the side of the forward rotation shaft and located on the left side of the first positioning boss; A first clamp groove, which is arranged on the left side of the first external thread; The counter-rotating shaft comprises: a second positioning boss protruding from a side surface of the counter-rotating shaft; a second positioning groove, which is provided on the side of the counter-rotating shaft and is located on the left side of the second positioning boss; a second external thread, which is provided on the side of the counter-rotating shaft and is located on the right side of the second positioning boss; a second clamp groove, which is arranged on the right side of the second external thread; The transmission mechanism also includes: a first positioning block, which is clamped in the first positioning groove; the first driven bevel gear is sleeved on the forward rotating shaft through the first through hole and the first positioning block is inserted into the first gear groove, and the left end surface of the first driven bevel gear abuts against the right side surface of the first positioning boss; A first fixing nut is sleeved on the forward rotating shaft and is threadedly connected to the first external thread, and the forward support bearing is positioned between the first fixing nut and the left side of the first positioning boss; a first fastening groove is provided on the outer side of the first fixing nut and penetrates to the center of the first fixing nut, and a first fastening screw fastens two side surfaces of the first fastening groove; A first clamp, which is clamped in the first clamp groove and pressed against the left side of the first fixing nut; A second positioning block is clamped in the second positioning groove; the second driven bevel gear is sleeved on the counter-rotating shaft through the second through hole and the second positioning block is inserted into the second gear groove, and the right end surface of the second driven bevel gear abuts against the left side surface of the second positioning boss; A second fixing nut is sleeved on the reverse rotating shaft and is threadedly connected with the second external thread, and the reverse support bearing is positioned between the second fixing nut and the right side surface of the second positioning boss; a second fastening groove is provided on the outer side surface of the second fixing nut and penetrates to the center of the second fixing nut, and a second fastening screw fastens two side surfaces of the second fastening groove; The second clamp is clamped in the second clamp groove and pressed against the right side of the second fixing nut.

9. The marine side thruster according to claim 1, characterized in that: The forward rotating shaft also includes: A first tilting platform, which is disposed on the side of the forward rotation axis and tilted inward from right to left; A first fixed thread, which is arranged on the left end side of the forward rotating shaft; The counter-rotating shaft further comprises: A second tilting platform, which is disposed on the side of the counter-rotating shaft and tilted inward from left to right; A second fixing thread, which is provided on the right end side surface of the counter-rotating shaft; The positive propeller comprises a first inner slurry, a first outer slurry arranged outside the first inner slurry and fixedly connected to the first inner slurry, and a positive blade arranged outside the first outer slurry; a hollow first slurry hole is arranged at the center of the first inner slurry, a square first slurry cavity is arranged inside the first slurry hole, and a first slurry positioning platform protruding inward is arranged at the left end of the first slurry cavity; The reverse propeller comprises a second inner slurry, a second outer slurry arranged outside the second inner slurry and fixedly connected to the second inner slurry, and a reverse blade arranged outside the second outer slurry; a hollow second slurry hole is arranged at the center of the second inner slurry, a square second slurry cavity is arranged inside the second slurry hole, and a second slurry positioning platform protruding inward is arranged at the right end of the second slurry cavity; The transmission mechanism also includes: a first axial connecting strip, which is disposed on a side of the forward rotating shaft and between the first fixing thread and the first tilting platform, and the first axial connecting strip is disposed along the axial direction of the forward rotating shaft; A first connecting sleeve, which has a hollow first set hole, a first inner connecting groove is arranged on the side of the first set hole, a first outer connecting strip is arranged on the outer side of the first connecting sleeve, the first connecting sleeve is sleeved on the forward rotating shaft and the first inner connecting groove is inserted into the first axial connecting strip; a protruding first set platform is arranged at the left end of the first connecting sleeve; A first stopper, the center of which is provided with a first stopper hole, the first stopper hole is an inclined hole inclined inward from right to left; and the inclination angle of the first stopper hole is the same as the inclination angle of the first inclined platform; the first stopper is sleeved on the first inclined platform; The first sleeve has a first hollow sleeve cavity at its center, a first sleeve groove arranged along the axial direction is arranged on the inner side of the first sleeve cavity, and the outer surface of the first sleeve is square; the first sleeve is sleeved on the first connecting sleeve and the first outer connecting strip is inserted into the first sleeve groove; the first sleeve is inserted into the first slurry cavity and the two ends of the first sleeve are limited to be located between the first slurry positioning platform and the first stopper, and the two ends of the first inner slurry are limited to be located between the first sleeve platform and the first stopper; A first locking nut, which is connected to the first fixing thread and is pressed against the left end surface of the first set; a second axial connecting strip, which is disposed on a side of the counter-rotating shaft and is located between the second fixing thread and the second tilting platform, and the second axial connecting strip is disposed along the axial direction of the counter-rotating shaft; A second connecting sleeve, which has a hollow second set of holes, a second inner connecting groove is provided on the side of the second set of holes, a second outer connecting strip is provided on the outer side of the second connecting sleeve, the second connecting sleeve is sleeved on the counter-rotating shaft and the second inner connecting groove is inserted into the second axial connecting strip; a protruding second set platform is provided at the right end of the second connecting sleeve; A second stopper, the center of which is provided with a second stopper hole, the second stopper hole is an inclined hole inclined inward from left to right; and the inclination angle of the second stopper hole is the same as the inclination angle of the second inclined platform; the second stopper is sleeved on the second inclined platform; The second sleeve has a hollow second sleeve cavity at its center, a second sleeve groove arranged along the axial direction is arranged on the inner side of the second sleeve cavity, and the outer surface of the second sleeve is square; the second sleeve is sleeved on the second connecting sleeve and the second outer connecting strip is inserted into the second sleeve groove; the second sleeve is inserted into the second slurry cavity and the two ends of the second sleeve are limited to be located between the second slurry positioning platform and the second stopper, and the two ends of the second inner slurry are limited to be located between the second sleeve platform and the second stopper; A second locking nut is connected to the second fixing thread and pressed against the right end surface of the second platform.

10. The marine side thruster according to claim 1, characterized in that: The forward rotation axis and the reverse rotation axis are perpendicular to the transmission shaft.

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