CN217706243U - Marine propeller - Google Patents

Abstract

The utility model provides a marine propeller, includes casing, screw, motor and planetary gear transmission, its characterized in that: the planetary gear transmission device comprises an inner gear ring; a planet wheel assembly; a planet carrier; the planet carrier comprises an input part, a support and an output part which are integrally formed, the input part is a hollow shaft sleeve, the output part is a solid shaft, the support is a cylinder, the diameter of the cylinder is larger than that of the shaft sleeve, the axis of the cylinder coincides with that of the shaft sleeve, and the front end of the output shaft of the motor is also provided with a central gear which can be meshed with each planetary gear. The utility model has the advantages that: the planet carrier with an integrated structure is adopted, so that the meshing with the inner gear ring is more accurate, and the whole machine runs more stably; the lubricating oil is filled in the inner cavity of the motor, so that the lubricating problem of the motor can be solved, the interior of the motor can be prevented from dewing and rusting, and the lubricating oil can also play a role in cooling as a transmission medium, so that the heat dissipation of the motor is quicker and the use is more stable.

Description

Marine propeller

Technical Field

The utility model relates to a propeller equipment, especially a marine electric propeller.

Background

The most common driving device for ship navigation in water is a propeller type ship propeller, which is mainly installed on a propulsion shaft below a waterline at the tail part of a ship through a propeller, the propulsion shaft is driven by a host to rotate together, water is sucked from a suction surface and discharged from a discharge surface of blades, and the ship is pushed to advance by using the reaction force of the water.

In the prior art, as an existing Chinese patent application, namely 'marine propeller', with the application number of 202011076024.7 as previously applied by the inventor, a propeller mechanism is disclosed, wherein the propeller mechanism comprises a power source, a transmission mechanism and a propeller, the transmission mechanism further comprises a first tooth part and a second tooth part which are meshed with an input shaft and an output shaft and are respectively arranged on the input shaft and the output shaft, and the marine propeller mechanism is characterized in that the first tooth part is a screw rod, and the second tooth part is a plane gear.

Generally, a speed reducer is required to be arranged at the output end of a motor in the propeller to realize speed regulation, and in order to reduce the volume of the motor part, a planetary gear structure is adopted to realize speed change at present. The utility model discloses a yacht propeller motor as chinese utility model ' yacht propeller motor ' of patent number 202123044582.8 discloses a yacht propeller motor, its structure includes rotor, stator and planetary gear, its characterized in that, the rotor sets up in the stator, the one end of rotor is connected with planetary gear's input, planetary gear's output and output shaft, stator and planetary gear's surface cover are equipped with the casing. The utility model discloses an installation planet wheel structure in yacht propeller motor through planet wheel structure output, can effectual reduction motor part's volume. However, the planet carrier and the output shaft of the planet wheel structure in the patent are mutually independent parts, secondary assembly is needed during installation, not only is the assembly complexity and the assembly time increased, but also the consistency and the reliability of a product are affected, and meanwhile, the output shaft of the existing planet wheel structure is independently assembled.

In addition, considering that the ship propeller usually works underwater and is soaked in water for a long time, the sealing of the motor is particularly important, once the sealing of the motor fails, lubricating oil in the motor can leak to cause water body pollution, and external water can easily enter the motor, so that the motor breaks down or even is dangerous. However, the above patent adopts the structure of common mechanical element oil seal and sealing ring to realize the sealing of the motor, and the ship propeller is placed in the underwater environment for a long time, so that the oil seal structure is easy to be oxidized or corroded, the service life of the sealing structure is reduced, and the use reliability and safety of the whole motor are finally affected.

Therefore, how to realize the effective sealing of the ship propeller, the reliability of the sealing element is ensured, and the service life of the sealing element is prolonged or prolonged, which is a problem that needs to be solved urgently at present.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the first technical problem that a marine propeller that the reduction gear assembly is more convenient and stability is high is provided to above-mentioned prior art current situation.

The utility model discloses the second technical problem that will solve provides a compromise lubricated and sealed and the reliability of seal is higher, life is longer marine propeller to above-mentioned prior art current situation.

The utility model provides a technical scheme that above-mentioned first technical problem adopted is: the utility model provides a marine propeller, includes the casing, sets up screw and can drive screw pivoted motor on the casing, still including connecting respectively the planetary gear transmission of motor and screw, its characterized in that: the planetary gear transmission device comprises

The inner gear ring is fixedly arranged in the machine shell;

the planet wheel assembly can be meshed with the inner gear ring and comprises at least two planet gears which can rotate along the circumferential direction of the inner gear ring;

the planet carrier comprises an input part connected with an output shaft of a motor, a bracket for mounting a planetary gear and an output part for connecting a propeller, wherein the input part is a hollow shaft sleeve, the output part is a solid shaft, the motor is provided with a motor output shaft which is rotatably arranged in the shaft sleeve, the propeller can synchronously rotate along with the solid shaft, and the input part and the output part are integrally formed;

the support is a cylinder integrally formed at the input part, the inner gear ring is sleeved outside the cylinder, the diameter of the cylinder is larger than the diameter of the shaft sleeve, the axis of the cylinder coincides with the axis of the shaft sleeve, gear shaft holes for the shaft pins of the planetary gears to penetrate are formed in the step surface of the shaft sleeve along the radial outward projection of the cylinder, the gear shaft holes are uniformly distributed along the circumferential direction of the step surface, through holes for the planetary gears to be exposed to enable the planetary gears to be meshed with the inner gear ring all the time are further formed in the outer circumferential surface of the cylinder, and a central gear capable of being meshed with each planetary gear is further arranged at the front end of the motor output shaft.

The utility model provides a technical scheme that above-mentioned second technical problem adopted is: the motor is characterized in that a closed motor inner cavity for accommodating the motor is formed in the shell, lubricating oil is filled in the motor inner cavity, an oil cavity which is communicated with the motor inner cavity and can be extended and contracted is further arranged outside the shell, and the oil cavity is located above the water surface.

Preferably, the oil chamber comprises an oil bag capable of elastically contracting and an oil pipe for connecting the oil bag and the inner cavity of the motor. For convenience of installation, the oil pipe can be a silicone pipe or a nylon pipe.

In order to conveniently detect the oil service condition of the motor cavity and inform a user of adding oil into the motor cavity from the outside in time, preferably, a liquid level sensor capable of detecting the liquid level of lubricating oil in the motor cavity is further arranged on the shell.

In order to facilitate processing, manufacturing and assembling, preferably, the casing comprises a front end cover, a casing body and a rear end cover, the casing body is arranged between the front end cover and the rear end cover, and the propeller is arranged behind the rear end cover.

In view of compact structure and easy underwater operation, it is preferable that the casing body includes a cylinder part to which the front and rear covers are connected, respectively, a wing part below the cylinder part, and a neck part above the cylinder part, wherein, and a shell which can be connected with an electric control device of the propeller is arranged on the neck of the shell body, the shell is communicated with an inner cavity for accommodating the motor, and a wiring board, a wire connecting post and a signal wire connecting post which are used for electric control connection are arranged on the shell.

In order to effectively improve the flexural strength and stability of the planet carrier when the motor operates, preferably, a support frame is further arranged in the machine shell body and sleeved outside the input part of the planet carrier, wherein a first bearing is arranged between the support frame and the input part of the planet carrier, the inner gear ring is fixed in the rear end cover, a second bearing is arranged between the rear end cover and the output part of the planet carrier, and the machine shell body, the support frame and the rear end cover are connected into a whole through fasteners. The bearing supports can be arranged at the two ends of the planet carrier respectively by arranging the support frame, so that the meshing precision of the planet gear and the inner gear ring is ensured, and the running stability of the motor is improved.

In order to prevent the play of the motor output shaft and ensure the stable operation, the motor output shaft is preferably arranged in the support frame in a penetrating way, the front end of the motor output shaft is meshed with the planetary gear of the planet carrier, and a third bearing is arranged between the support frame and the motor output shaft.

In order to guarantee the normal work of motor, prevent simultaneously that the motor from intaking and the oil leak, as preferred, the afterbody of rear end cap is provided with the closing cap that can seal this rear end cap, between first bearing and the third bearing be provided with the sealing member that can seal the motor inner chamber between second bearing and the closing cap respectively, and, the sealing member is an annular sealing pad, and this sealed cross section of filling up forms the recess that can pour into water seal lubricating grease including skeleton and double-deck sealed diaphragm between the adjacent sealed diaphragm. The sealing member of this application adopts unilateral two lip seal structure, and inside the waterproof stream got into the motor outward, the waterproof fluid leaks outward again in can, ensures security and the feature of environmental protection that the motor used under water.

For the convenience of installation is fixed, guarantees axial and radial location simultaneously, ensures the safe and reliable of use, as preferred, the motor is including stator module, rotor subassembly, magnet steel and motor output shaft, wherein, the rotor subassembly connect in just can drive this motor output shaft synchronous revolution on the motor output shaft, the magnet steel sets up between stator module and rotor subassembly, stator module axial spacing in on the casing body, the rotor subassembly both ends still are provided with the rotor end plate that can prevent the rotor punching piece among the rotor subassembly from loosening.

Compared with the prior art, the utility model has the advantages of:

1. the planet carrier with the integrated structure is suitable for being used by a ship propeller, and compared with the traditional planet carrier, the integral strength performance of the planet carrier is improved, the processing characteristics of a shaft pin hole of a planet wheel can be effectively guaranteed, the processing position and size cannot be influenced after assembly, the meshing with an inner gear ring is more accurate, and the whole machine runs more stably; simultaneously, the integration planet carrier can surpass traditional planet carrier cantilever beam and support, realizes that both ends bearing supports, and the structure is more reasonable, and stability is higher.

2. Lubricating oil is filled in an inner cavity of the motor, the lubricating oil expands with heat and contracts with cold along with the change of the working temperature in the motor, and an oil cavity or an oil cavity is additionally arranged outside the motor, so that the inner cavity of the motor can achieve the effect of automatic balance; in addition, because the motor inner chamber is full of lubricating oil, lubricating oil can also play the refrigerated effect as the transmission medium for the heat dissipation of motor is more quick, uses more stably.

3. The planetary gear transmission device adopts a front and rear single-side double-lip sealing structure, the sealing performance of the oil seal can be better ensured, and the double-lip sealing structure can be used for dry friction, so that the service life of the planetary gear transmission device is longer and more durable compared with a common framework oil seal.

Drawings

Fig. 1 is a schematic perspective view of a marine propeller according to an embodiment of the present invention.

Fig. 2 is a sectional view of a marine propeller according to an embodiment of the present invention (with a propeller assembly removed).

Fig. 3 is a schematic view of a three-dimensional structure of an integral planet carrier according to an embodiment of the present invention.

Fig. 4 is a cross-sectional view of the carrier shown in fig. 3.

Fig. 5 is a cross-sectional perspective view of the planetary gear transmission device according to the embodiment of the present invention.

Fig. 6 is a sectional view of the speed reduction box assembly mounting structure according to the embodiment of the present invention.

FIG. 7 is a cross-sectional view of a rear cover of the reduction gearbox assembly shown in FIG. 6.

Figure 8 is a cross-sectional view of the support bracket of the reduction gearbox assembly shown in figure 6.

Fig. 9 is a partial sectional view of the oil injection sealing structure according to the embodiment of the present invention.

Fig. 10 is a schematic perspective view of a sealing member according to an embodiment of the present invention.

Figure 11 is a cross-sectional view of a seal according to an embodiment of the present invention.

Fig. 12 is an enlarged view of part I shown in fig. 11.

Detailed Description

The present invention will be described in further detail with reference to the following embodiments.

As shown in fig. 1 to 12, the present embodiment relates to a marine propeller, which includes a housing, a propeller 2 disposed on the housing, a motor capable of driving the propeller 2 to rotate, and a planetary gear 63 transmission device respectively connected to the motor and the propeller 2.

Considering compact structure and being convenient for underwater work, the casing of this embodiment is including front end housing 11, casing body 12 and rear end cap 13, casing body 12 sets up between front end housing 11 and rear end cap 13, and screw 2 sets up behind rear end cap 13, and the screw 2 of this embodiment is the subassembly including a plurality of parts such as paddle, spiral section of thick bamboo, and this screw 2 structure is prior art, does not expand in this embodiment and gives redundant details.

The casing body 12 includes a cylinder 121 that can be connected to the front end cover 11 and the rear end cover 13, a wing 122 below the cylinder 121, and a neck 123 above the cylinder 121, the neck 123 of the casing body 12 is further provided with a housing 3 that can be connected to an electric control device of the propeller, the housing 3 is communicated with an inner cavity for accommodating the motor, and the housing 3 is provided with a wiring board 31, a wire connecting post 32, and a signal wire connecting post 33 for electric control connection, as shown in fig. 1, 2, and 9.

A motor inner cavity 9 which is used for accommodating a motor and is closed is formed in the shell, lubricating oil is filled in the motor inner cavity 9, an oil cavity 4 which is communicated with the motor inner cavity 9 and can be expanded and contracted is further formed outside the shell, and the oil cavity 4 is arranged above the water surface, so that the operation of workers on a ship is facilitated; wherein, the oil chamber 4 can adopt an elastically contractible oil bag, an oil pipe 41 is arranged between the oil bag and the motor inner chamber 9, the oil pipe 41 can adopt a silicone tube or a nylon tube, one end of the oil pipe 41 is connected to the shell 3, and the other end is connected with the oil bag; the motor is initially in a negative pressure state, lubricating oil freely expands after being heated and freely contracts after being heated along with the change of working temperature (expansion with heat and contraction with cold) in the motor, and the oil bag connected through the oil pipe 41 has the function of automatic contraction, so that an automatic balance effect can be formed between the inner cavity 9 of the motor and the oil bag.

In order to detect the use condition of the oil in the motor cavity 9 conveniently, a liquid level sensor (not shown) capable of detecting the level of the lubricating oil in the motor cavity 9 is further arranged on the casing, the liquid level sensor can monitor the amount of the oil in the motor cavity 9, and the lamp is turned on to give an alarm when the oil is less than a warning value, so that a user is informed to add the oil to the motor cavity 9 from the outside.

In the embodiment, the lubricating oil in the inner cavity 9 of the motor is special oil, and the embodiment adopts modified oil taking high-grade sewing machine oil as base oil, so that the oil has self-volatility, does not generate oil sludge after long-time working, and can well solve the problem of cleaning the interior of the motor; simultaneously, this oil still has better oxidation resistance, rust resistance and lubricity, and non-corrosiveness, and motor inner chamber 9 fills lubricating oil, has solved the lubrication problem of motor on the one hand, and on the other hand can also avoid the inside dewfall of motor to rust, simultaneously, can solve the motor cooling problem for the heat dissipation is faster, and work is more stable.

The planetary gear 63 transmission device of the embodiment comprises an inner gear ring 61, a planetary wheel assembly and a planet carrier 62, wherein the inner gear ring 61 is fixedly arranged in the machine shell; the planet wheel assembly can be meshed with the inner gear ring 61, the planet wheel assembly comprises at least two planet gears 63 which can rotate along the circumferential direction of the inner gear ring 61, and the number of the planet gears 63 in the embodiment is four, and the embodiment is shown in fig. 3-5;

the planet carrier 62 comprises an input part 621 connected with the output shaft 94 of the motor, a bracket 622 for mounting the planet gear 63 and an output part 623 for connecting with the propeller 2, wherein the input part 621 is a hollow shaft sleeve, and the motor is provided with the output shaft 94 of the motor which is rotatably arranged in the shaft sleeve; the output portion 623 is a solid shaft, the propeller 2 can synchronously rotate along with the solid shaft, and the input portion 621 and the output portion 623 are integrally formed; the support 622 is a cylinder integrally formed on the input portion 621, the inner gear ring 61 is sleeved outside the cylinder, the diameter of the cylinder is larger than the diameter of the shaft sleeve, the axis of the cylinder coincides with the axis of the shaft sleeve, the cylinder is radially and outwardly protruded on the step surface of the shaft sleeve, four gear shaft holes 6221 for the shaft pins 631 of the planetary gears 63 to penetrate are formed in the cylinder, the four gear shaft holes 6221 are uniformly distributed along the circumferential direction of the step surface, a through hole 6222 for the planetary gears 63 to be exposed so that the planetary gears 63 are always meshed with the inner gear ring 61 is further formed in the outer circumferential surface of the cylinder, and a sun gear 941 capable of being meshed with each planetary gear 63 is further arranged at the front end of the motor output shaft 94.

In order to facilitate the installation and positioning of the planet carrier 62, a support frame 7 is further disposed in the case body 12 of the embodiment, referring to fig. 8, the support frame 7 is sleeved outside the input portion 621 of the planet carrier 62, wherein a first bearing 81 is disposed between the support frame 7 and the input portion 621 of the planet carrier 62, the ring gear 61 is fixed in the rear end cover 13, a second bearing 82 is disposed between the rear end cover 13 and the output portion 623 of the planet carrier 62, and the case body 12, the support frame 7 and the rear end cover 13 are connected into a whole through fasteners; meanwhile, the motor output shaft 94 penetrates through the support frame 7, the front end of the motor output shaft 94 is meshed with the planetary gear 63 of the planet carrier 62, and a third bearing 83 is arranged between the support frame 7 and the motor output shaft 94.

The motor of this embodiment is including stator module 91, rotor subassembly 92, magnet steel 93 and motor output shaft 94, for the convenience of installation is fixed, guarantee axial and radial location simultaneously, ensure the safe and reliable that uses, wherein, motor output shaft 94 wears to locate among rotor subassembly 92, this rotor subassembly 92 shaping has radial inside convex key structure, and the recess that corresponds with corresponding key structure is then seted up to motor output shaft 94's periphery wall, thereby make and realize the key-type connection between rotor subassembly 92 and the motor output shaft 94, and can drive this motor output shaft 94 synchronous revolution, magnet steel 93 sets up between stator module 91 and rotor subassembly 92, stator module 91 axial is spacing on housing body 12, rotor subassembly 92 both ends still are provided with the rotor end plate 95 that can prevent the rotor in the rotor subassembly 92 from loosening towards the piece.

In order to prevent the motor from water and oil leakage, a sealing cover 131 capable of sealing the rear end cover 13 is disposed at the tail of the rear end cover 13, and sealing members capable of sealing the motor inner cavity 9 are respectively disposed between the first bearing 81 and the third bearing 83, and between the second bearing 82 and the sealing cover 131, as shown in fig. 6 to 8.

The sealing member (commonly called "oil seal") of this embodiment is an annular sealing gasket 5, and referring to fig. 10 to 12, the cross section of the sealing gasket 5 includes an L-shaped frame 50 and two layers of sealing membranes 51 located inside the frame 50, a groove 52 is formed between adjacent sealing membranes 51, water sealing grease using PAO as base oil can be injected, and in order to improve the sealing reliability, the bottom of each sealing membrane 51 has a curved folded edge 511, and the folded edge 511 is abutted against the outer peripheral wall of the motor output shaft 94 (or the output portion 623 of the planet carrier 62, i.e. the solid shaft portion).

The sealed 5 that fills up of this embodiment adopts unilateral two lip seal structure, can be outside waterproof stream get into inside the motor, can interior waterproof liquid leak outward again, plays dual sealed and lubricated effect, ensures security and the feature of environmental protection that the motor used under water.

The framework 50 of the sealing gasket 5 of the embodiment is made of metal materials, so that the sealing gasket plays an effective role in supporting and positioning, the sealing membrane 51 is made of tetrafluoroethylene synthetic materials, so that the sealing gasket has memory property, can always keep the same holding force after being shaped, and can automatically compensate after being worn; moreover, the sealing membrane 51 of the embodiment has good self-lubricating property, can work under the condition of no lubrication, has the service life of 8000h, can work at the temperature of 260 ℃ and can bear the sealing pressure of 1Mpa, and the linear velocity reaches 25m/s; in addition, the sealing friction surface 21 is covered by a special wear-resistant coating (mainly made of ceramic materials in the embodiment), the surface hardness can reach more than HV1000, the surface smoothness is less than 0.2um, the wear resistance is good, the friction resistance is small, and by matching with the sealing membrane 51, the service life of parts is greatly prolonged, and the starting resistance of the motor and the energy loss during working are reduced.

In addition, in this embodiment, a plurality of layers of wave-shaped elastic pieces are arranged between the bearing and the shaft end, when the motor stops operating, due to inertia, the output shaft 94 of the motor receives a backward impact force, and the backward impact force is buffered by the wave-shaped elastic pieces at the moment, so that the impact force is reduced, and the motor shaft is protected.

The planet carrier 62 of the embodiment adopts an integrated design, so that the overall strength performance of the planet carrier 62 is improved, and the meshing precision is ensured; in the embodiment, the input end of the transmission device of the planetary gear 63, the planet carrier 62 and the output end are integrally formed, the integrated structure of the planet carrier 62 can ensure the processing characteristics of the hole of the planet gear shaft pin 631, and the processing position and size cannot be influenced after assembly, so that the planetary gear 63 is more accurately meshed with the inner gear ring 61; moreover, the planet carrier 62 integration can surpass traditional planet carrier 62 cantilever beam and support, realizes that both ends bearing supports, and the structure is more reasonable, and planet carrier 62 flexural strength and stability when effectively improving motor operation also can further improve the meshing stability and the precision of planetary gear 63 and ring gear 61.

The motor output shaft 94 of the embodiment extends into the integrated planet carrier 62, so that the meshing accuracy between the inner gear ring 61 and the four planetary gears 63 is well guaranteed, the inner gear ring 61 and the rear end cover 13 are fixed in a hot-assembling mode, meanwhile, the rear end cover 13 is connected with the support frame 7 in a precise matching mode, the meshing accuracy and stability of the inner gear ring 61, the planetary gears 63 and the motor output shaft 94 are guaranteed, and the performance of the whole machine is better.

Directional terms such as "front", "rear", "upper", "lower", "left", "right", "side", "top", "bottom", and the like are used in the description and claims of the present invention to describe various example structural portions and elements of the present invention, but these terms are used herein for convenience of description only and are determined based on example orientations shown in the drawings. Because the disclosed embodiments may be oriented in different directions, the directional terms are used for descriptive purposes and are not intended to be limiting, e.g., "upper" and "lower" are not necessarily limited to directions opposite or coincident with the direction of gravity.

Claims (10)

1. The utility model provides a marine propeller, includes the casing, sets up screw (2) on the casing and can drive screw (2) pivoted motor, still including connecting respectively planetary gear (63) transmission of motor and screw (2), its characterized in that: the planetary gear (63) transmission device comprises

The inner gear ring (61) is fixedly arranged in the shell;

the planet wheel assembly can be meshed with the inner gear ring (61), and comprises at least two planet gears (63) which can rotate along the circumferential direction of the inner gear ring (61);

the planet carrier (62) comprises an input part (621) connected with a motor output shaft (94), a bracket (622) for mounting a planetary gear (63) and an output part (623) for connecting a propeller (2), wherein the input part (621) is a hollow shaft sleeve, the output part (623) is a solid shaft, the motor is provided with the motor output shaft (94) rotatably arranged in the shaft sleeve, the propeller (2) can synchronously rotate along with the solid shaft, and the input part (621) and the output part (623) are integrally formed;

support (622) is the drum of integrated into one piece in input portion (621), ring gear (61) cover is located outside the drum, and the diameter of this drum is greater than axle sleeve diameter and this drum axis coincides mutually with the axle sleeve axis, the drum is along radially outwards protruding offer gear shaft hole (6221) that axle pin (631) that can supply planetary gear (63) to wear to establish on the step face of axle sleeve, gear shaft hole (6221) are along the circumference evenly distributed of step face, the outer peripheral face of drum has still been seted up and has been supplied planetary gear (63) to expose and make planetary gear (63) always with through-hole (6222) that ring gear (61) engaged with, motor output shaft (94) front end still be provided with can with each sun gear (941) that planetary gear (63) engaged with mutually.

2. The marine propulsor of claim 1, the method is characterized in that: the motor is characterized in that a motor inner cavity (9) which is used for accommodating the motor and is closed is formed in the machine shell, lubricating oil is filled in the motor inner cavity (9), an oil cavity (4) which is communicated with the motor inner cavity (9) and can be extended and contracted is further arranged outside the machine shell, and the oil cavity (4) is located above the water surface.

3. Marine propulsor according to claim 2, wherein: the oil cavity (4) comprises an elastically contractible oil bag and an oil pipe (41) connecting the oil bag and the inner cavity (9) of the motor.

4. Marine propulsor according to claim 2, wherein: and a liquid level sensor capable of detecting the liquid level of lubricating oil in the motor inner cavity (9) is also arranged on the shell.

5. Marine propulsor according to claim 1, wherein: the casing comprises a front end cover (11), a casing body (12) and a rear end cover (13), wherein the casing body (12) is arranged between the front end cover (11) and the rear end cover (13), and the propeller (2) is arranged behind the rear end cover (13).

6. Marine propulsor according to claim 5, characterised in that: the electric propeller is characterized in that the machine shell body (12) comprises a cylinder part (121) which can be respectively connected with the front end cover (11) and the rear end cover (13), a wing part (122) positioned below the cylinder part (121) and a neck part (123) positioned above the cylinder part (121), wherein a shell (3) which can be connected with an electric control device of the propeller is further arranged on the neck part (123) of the machine shell body (12), the shell (3) is communicated with an inner cavity for accommodating a motor, and a wiring board (31), a wire connecting column (32) and a signal wire connecting column (33) which are used for electric control connection are arranged on the shell (3).

7. Marine propulsor according to claim 5, characterised in that: still be provided with support frame (7) in casing body (12), outside input portion (621) of planet carrier (62) were located to this support frame (7) cover, wherein, be provided with first bearing (81) between input portion (621) of support frame (7) and planet carrier (62), ring gear (61) are fixed in within rear end cover (13), are provided with second bearing (82) between output portion (623) of this rear end cover (13) and planet carrier (62), be connected as an organic whole through the fastener between casing body (12), support frame (7) and rear end cover (13).

8. Marine propulsor according to claim 7, characterised in that: the motor output shaft (94) penetrates through the support frame (7), the front end of the motor output shaft (94) is meshed with the planetary gear (63) of the planet carrier (62), and a third bearing (83) is arranged between the support frame (7) and the motor output shaft (94).

9. Marine propulsor according to claim 8, characterised in that: the tail part of rear end housing (13) is provided with closing cap (131) that can seal this rear end housing (13), be provided with the sealing member that can seal motor inner chamber (9) between first bearing (81) and third bearing (83), between second bearing (82) and closing cap (131) respectively, and, the sealing member is a sealed pad of annular, and the cross section of this sealed pad is including skeleton and double-deck sealed diaphragm, forms the recess that can pour into water seal lubricating grease between the adjacent sealed diaphragm.

10. Marine propulsor according to claim 1, wherein: the motor is including stator module (91), rotor subassembly (92), magnet steel (93) and motor output shaft (94), wherein, rotor subassembly (92) connect in on motor output shaft (94) and can drive this motor output shaft (94) synchronous revolution, magnet steel (93) set up between stator module (91) and rotor subassembly (92), stator module (91) axial spacing in on the casing body, rotor subassembly (92) both ends still are provided with rotor end plate (95) that can prevent the rotor punching piece among rotor subassembly (92) from loosening.

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