CN112519997A

CN112519997A - Propeller and water running device

Info

Publication number: CN112519997A
Application number: CN202011598432.9A
Authority: CN
Inventors: 朱秋阳; 祝伟杰
Original assignee: Shenzhen Weidu Intelligent Technology Co ltd
Current assignee: Shenzhen Weidu Intelligent Technology Co ltd
Priority date: 2020-12-29
Filing date: 2020-12-29
Publication date: 2021-03-19

Abstract

The invention discloses a propeller and a water running device, wherein the propeller comprises a shell, a motor stator, a rotating bracket, a propeller and a motor rotor, wherein the shell is enclosed to form an installation channel with openings at two ends; the motor stator is fixedly arranged on the shell; the rotating bracket is connected to the shell and is positioned in the mounting channel; the propeller is provided with one of a rotating shaft and a rotating shaft hole, the rotating bracket is provided with the other of the rotating shaft and the rotating shaft hole, and the rotating shaft is inserted in the rotating shaft hole so that the propeller can rotate relative to the rotating bracket; the motor rotor is arranged on the propeller in a surrounding mode and is located in the installation channel so as to be oppositely coupled with the motor stator. The technical scheme of the invention aims to improve the convenience of the installation and maintenance of the propeller and improve the safety and the operation efficiency of the propeller.

Description

Propeller and water running device

Technical Field

The invention relates to the technical field of propellers, in particular to a propeller and a water running device applying the propeller.

Background

In the related art, as society develops, electric surfboards and other water running devices are increasingly popularized to the public, and the electric surfboards and other water running devices generally need to use a propeller to provide thrust to move. The existing propeller generally adopts a distribution structure of a motor, a support and a propeller, and all parts are connected through a transmission shaft, so that the propeller is complex to install, a great deal of inconvenience exists in the aspects of use, installation and maintenance, and the problems of potential safety hazards and insufficient power exist.

The above is only for the purpose of assisting understanding of the technical solutions of the present application, and does not represent an admission that the above is prior art.

Disclosure of Invention

The invention mainly aims to provide a propeller, aiming at improving the convenience of installation and maintenance of the propeller and improving the safety and the operation efficiency of the propeller.

In order to achieve the above object, the present invention provides a propeller comprising:

the shell surrounds and forms an installation channel with two open ends;

the motor stator is fixedly arranged on the shell;

a rotating bracket connected to the housing and located within the mounting channel;

the propeller is provided with one of a rotating shaft and a rotating shaft hole, the rotating bracket is provided with the other of the rotating shaft and the rotating shaft hole, and the rotating shaft is inserted in the rotating shaft hole so that the propeller can rotate relative to the rotating bracket; and

and the motor rotor is annularly arranged on the propeller and positioned in the mounting channel so as to be oppositely coupled with the motor stator.

In an embodiment of this application, the screw includes paddle portion and circumference ring locate the supporting part of paddle portion, paddle portion has seted up the pivot hole, runing rest is equipped with the pivot.

In an embodiment of the present application, the rotating bracket further includes a connecting portion and a fixing portion connected to each other, the fixing portion is connected to the housing, and the rotating shaft is inserted into the rotating shaft hole of the blade portion.

In an embodiment of the present application, the fixing portion is circumferentially disposed along an outer side of the connecting portion.

In an embodiment of the application, the connecting portion includes a connecting column and a plurality of guiding pieces, the connecting column is provided with a through hole, the rotating shaft passes through the through hole to be inserted into the rotating shaft hole, and the plurality of guiding pieces are annularly arranged on the outer surface of the connecting column at intervals.

In an embodiment of the application, the motor rotor forms a glue filling layer on the outer wall of the supporting part in a potting mode, so that the motor rotor and the propeller are of an integrated structure;

and/or the blade part and the supporting part are of an integral structure;

and/or the supporting part is annularly arranged to enclose and form an accommodating space with two open ends, and the plurality of blade parts are connected with the inner wall surface of the supporting part and are positioned in the accommodating space.

In an embodiment of the present application, the motor stator and the housing are of an integral structure.

In an embodiment of the application, be equipped with the installation cavity in the casing, motor stator set up in the installation cavity.

In an embodiment of the application, the propeller further comprises a flow guide cover, the installation channel is provided with a water inlet and a water outlet, and the flow guide cover is connected to the propeller and located at one end of the water outlet.

The invention also proposes a water running device comprising a propeller, said propeller comprising:

the shell surrounds and forms an installation channel with two open ends;

the motor stator is fixedly arranged on the shell;

The propeller provided by the technical scheme of the invention can be installed in water running equipment such as an electric surfboard and the like so as to push water flow to move. And this propeller includes casing and motor stator, and this motor stator is fixed to be set up in the casing to guarantee the stability of motor stator during operation. The shell is enclosed to form an installation channel with openings at two ends, the propeller also comprises a rotating bracket, a propeller and a motor rotor, the rotating bracket is connected to the shell and is positioned in the installation channel, the propeller is provided with one of a rotating shaft and a rotating shaft hole, the rotating bracket is provided with the other of the rotating shaft and the rotating shaft hole, and the rotating shaft is inserted in the rotating shaft hole, so that the propeller can rotate relative to the rotating bracket. The motor rotor and the propeller are of an integrated structure and are positioned in the mounting channel, so that the motor rotor and the motor stator are coupled and rotate relatively. Therefore, after the motor stator is electrified, a magnetic field is generated to drive the motor rotor to rotate, so that the propeller is synchronously driven to rotate relative to the shell. And because this electric motor rotor and screw structure as an organic whole, saved the setting of transmission structure promptly to reduce the propeller volume effectively, practice thrift installation space and reduce the complexity of propeller installation and maintenance time, and directly drive the screw by electric motor rotor and rotate, promoted the security and the operating efficiency of propeller.

In addition, through set up pivot or pivot hole at runing rest and screw and carry out normal running fit, so this mounting means is comparatively convenient and installation accuracy is higher, the maintenance of being convenient for earlier stage installation and later stage is dismantled. Simultaneously not only for the screw provide the holding power to stability when guaranteeing the screw rotation also provides spacing effect for the screw and breaks away from when preventing the screw rotation, and then improved the security of screw when rotating for the casing, so that user's use.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

FIG. 1 is a schematic structural diagram of an embodiment of a propeller of the present invention;

FIG. 2 is a schematic view of another aspect of the propeller of the present invention;

FIG. 3 is a schematic cross-sectional view of the propeller of the present invention;

FIG. 4 is a schematic illustration of an exploded view of the thruster of the present invention;

FIG. 5 is a schematic view of a half-section of a motor rotor and a propeller of the present invention;

fig. 6 is a schematic view of a half-section structure of a motor stator and a shell of the propeller of the present invention.

The reference numbers illustrate:

reference numerals	Name (R)	Reference numerals	Name (R)
				100	Propeller	50	Glue filling layer
10	Shell body	60	Drainage cover
				11	Installation channel	61	Handling hole
111	Water inlet	70	Rotating member
				112	Water outlet	80	Rotating support
12	Plug-in port	81	Connecting part
				13	Pouring closure	811	Connecting column
20	Motor stator	8111	Through hole
				30	Propeller	812	Guiding sheet
31	Blade section	82	Fixing part
				311	Rotating shaft hole	83	Rotating shaft
32	Supporting part	84	Fixing screw
				321	Accommodation space	90	Auxiliary bearing
40	Motor rotor

The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that all the directional indicators (such as up, down, left, right, front, and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the movement situation, etc. in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indicator is changed accordingly.

In the present invention, unless otherwise expressly stated or limited, the terms "connected," "secured," and the like are to be construed broadly, and for example, "secured" may be a fixed connection, a removable connection, or an integral part; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In addition, the descriptions related to "first", "second", etc. in the present invention are only for descriptive purposes and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and/or" appearing throughout is to include three juxtapositions, exemplified by "A and/or B," including either the A or B arrangement, or both A and B satisfied arrangement. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.

The present invention proposes a propeller 100.

Referring to fig. 1 to 3, in the embodiment of the present invention, the propeller 100 includes a housing 10, a motor stator 20, a rotating bracket 80, a propeller 30, and a motor rotor 40, wherein the housing 10 encloses a mounting channel 11 with two open ends; the motor stator 20 is fixedly arranged on the shell 10; the rotating bracket 80 is connected to the housing 10 and is located in the installation passage 11; the propeller 30 is provided with one of the rotation shaft 83 and the rotation shaft hole 311, the rotation bracket 80 is provided with the other of the rotation shaft 83 and the rotation shaft hole 311, and the rotation shaft 83 is inserted in the rotation shaft hole 311 so that the propeller 30 can rotate relative to the rotation bracket 80; the motor rotor 40 is annularly provided to the propeller 30 and is located in the mounting channel 11 to be coupled opposite to the motor stator 20.

The propeller 30 may be completely received in the mounting channel 11, so as to prevent the propeller 30 from being exposed and easily damaged, and reduce the axial length of the propeller 100, thereby further saving the mounting space and reducing the complexity of the propeller 100 during mounting. The housing 10 may be a circular ring for easy holding and installation by a user, and is also adapted to an external structure. Meanwhile, the housing 10 forms a mounting passage 11 with openings at both ends so that water can pass through the mounting passage 11, and the openings at both ends of the housing 10 can have the same size and shape so that a user can mount the propellers 30 from either direction at both ends to improve the mounting efficiency. The housing 10 is mainly used for carrying the motor stator 20 and for connecting with an external structure, and the propeller 30 is mainly used for driving water flow to rotate in water. In this way, for the structural strength of the housing 10 and the propeller 30 in terms of service life, the housing 10, the rotating bracket 80, and the propeller 30 may be made of metal materials, for example: copper material, copper alloy material, iron material, stainless steel material, etc. This runing rest 80 accessible joint or mode such as screw connection are fixed in the installation passageway 11 of casing 10 to the installation of earlier stage and the maintenance in later stage are changed, and this rotation piece 70 is located installation passageway 11 and takes place in order to avoid exposing thereby the condition that leads to receiving the striking easily and damage.

The propeller 100 according to the present invention may be installed in a water running device such as an electric surfboard, etc. to propel a water current for movement. The propeller 100 includes a housing 10 and a motor stator 20, and the motor stator 20 is fixedly disposed on the housing 10 to ensure stability of the motor stator 20 during operation. The housing 10 encloses to form a mounting channel 11 with two open ends, and the propeller 100 further comprises a rotary bracket 80, a propeller 30 and a motor rotor 40, wherein the rotary bracket 80 is connected to the housing 10 and located in the mounting channel 11, the propeller 30 is provided with one of a rotary shaft 83 and a rotary shaft hole 311, the rotary bracket 80 is provided with the other of the rotary shaft 83 and the rotary shaft hole 311, and the rotary shaft 83 is inserted into the rotary shaft hole 311, so that the propeller 30 can rotate relative to the rotary bracket 80. The motor rotor 40 and the propeller 30 are integrated and located in the installation channel 11, so that the motor rotor 40 and the motor stator 20 are coupled to rotate relatively. After the motor stator 20 is energized, a magnetic field is generated to drive the motor rotor 40 to rotate, so that the propeller 30 is synchronously driven to rotate relative to the housing 10. And because this motor rotor 40 and screw 30 structure as an organic whole, saved the setting of transmission structure promptly to reduce propeller 100 volume effectively, practice thrift installation space and reduce the complexity when propeller 100 installs and maintains, and driven screw 30 by motor rotor 40 directly and rotated, promoted propeller 100's security and operating efficiency. In addition, through set up pivot 83 or pivot hole 311 at runing rest 80 and screw 30 and carry out normal running fit, so this mounting means is comparatively convenient and installation accuracy is higher, is convenient for earlier stage installation and later stage's maintenance dismantlement. Meanwhile, not only is a supporting force provided for the propeller 30, so that the stability of the propeller 30 during rotation is ensured, but also a limiting effect is provided for the propeller 30 to prevent the propeller 30 from being separated during rotation, so that the safety of the propeller 30 during rotation relative to the shell 10 is improved, and the use of a user is facilitated.

In an embodiment of the present application, referring to fig. 3 to 4, the propeller 30 includes a blade portion 31 and a supporting portion 32 circumferentially surrounding the blade portion 31, the blade portion 31 is provided with a rotating shaft hole 311, and the rotating bracket 80 is provided with a rotating shaft 83. Specifically, this paddle portion 31 is equipped with a plurality of paddles, and a plurality of paddles are the setting of arranging of spiral to it is rotatory in order to produce steady thrust to make can evenly drive rivers. In addition, the supporting portion 32 is annularly disposed to enclose an accommodating space 321 with two open ends, and the paddle portion 31 is connected to a surface of the supporting portion 32 in the accommodating space 321. Specifically, the supporting portion 32 is annularly disposed so as to facilitate an operator to hold the propeller 30 during installation, and meanwhile, the motor rotor 40 can be circumferentially arranged along the outer surface of the supporting portion 32 at intervals so as to better rotate in relative coupling with the motor stator 20. And this paddle portion 31 is located the surface connection of accommodation space 321 with supporting part 32 to can guarantee the area of contact of paddle portion 31 and supporting part 32, in order to guarantee the stability that both are connected, make paddle portion 31 be located accommodation space 321 simultaneously, and then avoid paddle portion 31 to expose and receive the striking easily and damage, in order to improve the holistic life of screw 30. The paddle portion 31 is provided with a rotating shaft hole 311, so that the mass of the paddle portion 31 can be reduced, and the motor rotor 40 can drive the propeller 30 to rotate more easily. It should be noted that the rotation shaft hole 311 may be opened in the center of the blade portion 31, so as to balance the force applied when the blade portion 31 rotates and improve the stability during rotation. In addition, the auxiliary bearings 90 can be arranged at the two opposite ends of the rotating shaft hole 311 to limit and abut against the rotating shaft 83 respectively, so that the stability of the rotating connection between the propeller 30 and the rotating bracket 80 is ensured.

Further, referring to fig. 4, the rotating bracket 80 further includes a connecting portion 81 and a fixing portion 82 connected to each other, the fixing portion 82 is connected to the housing 10, and the rotating shaft 83 is inserted into the rotating shaft hole 311 of the blade portion 31 through the connecting portion 81. Specifically, the connecting portion 81 and the fixing portion 82 may be formed as a single body, so that an early installation process is omitted, and the structural strength of the rotating bracket 80 as a whole is ensured. The fixing portion 82 may be detachably fixed to the housing 10 by a snap or a screw connection, so as to facilitate later maintenance and replacement.

Further, the fixing portion 82 is circumferentially provided along the outer side of the connecting portion 81. Wherein, in order to guarantee the stability that fixed part 82 and casing 10 are connected to this fixed part 82 encircles the setting along the outside circumference of connecting portion 81, so with the area of contact of increase fixed part 82 and casing 10, thereby connect back stability with improving the rotation support, and make the atress balance of fixed part 82 all directions, the installation of also being convenient for simultaneously operating personnel grips, efficiency after the improvement installation.

Optionally, the connecting portion 81 includes a connecting column 811 and a plurality of guiding sheets 812, the connecting column 811 is provided with a through hole 8111, the rotating shaft 83 passes through the through hole 8111 to be inserted into the rotating shaft hole 311, and the plurality of guiding sheets 812 are arranged on the outer surface of the connecting column 811 in a spaced-apart manner. Specifically, the connection column 811 is opened with a through hole 8111 so as to pass through the through hole 8111 through the rotation shaft 83 to be inserted into the rotation shaft hole 311 of the blade part 31, thereby ensuring the stability of the rotational connection between the rotating bracket 80 and the propeller 30. In addition, the rotating bracket 80 may further include a fixing screw 84, the fixing screw 84 is inserted into the through hole 8111 of the connecting portion 81 and abuts against and is limited by one side of the connecting portion 81, and one end of the fixing screw 84 inserted into the through hole 8111 of the connecting portion 81 is in threaded connection with the rotating shaft 83, so as to ensure stability of the rotating shaft 83 after installation. The plurality of guide pieces 812 are arranged on the outer surface of the connecting column 811 in a surrounding manner at intervals, so that gaps are formed between the guide pieces 812 to facilitate water flow to pass through, and the guide pieces 812 in all directions are balanced in stress due to the arrangement at intervals to ensure the guiding effect. It will be appreciated that the guide plate 812 is arranged in an arc such that the water flow is guided to flow faster by arranging a plurality of guide plates 812 to improve the propelling effect of the propeller 100. The specific number of the guiding sheets 812 can be selected by those skilled in the art, and will not be described herein.

In an embodiment of the present application, referring to fig. 5, the motor rotor 40 forms a potting layer 50 on an outer wall of the propeller 30 by means of potting, so that the motor rotor 40 and the propeller 30 are an integrated structure; specifically, this electric motor rotor 40 can form encapsulating layer 50 so that electric motor rotor 40 and screw 30 structure as an organic whole at the outer wall of screw 30 through the embedment mode, so this forming process is comparatively convenient and comparatively stable, and can not damage electric motor rotor 40, guarantees the water-proof effects to electric motor rotor 40 simultaneously to improve the security of screw 30 in the use. Of course, the motor rotor 40 may also be integrally formed by welding or injection molding, which may be selected by those skilled in the art and will not be described herein.

Alternatively, the paddle portion 31 and the support portion 32 are of unitary construction; the paddle portion 31 and the support portion 32 may be formed as an integral structure by injection molding or the like. Namely, the overall structural strength of the propeller 30 is ensured, and the assembling process of the propeller 30 is omitted, thereby improving the overall assembling efficiency of the propeller 100.

Alternatively, referring to fig. 5, the support portion 32 is annularly disposed to enclose an accommodating space 321 with two open ends, and the paddle portion 31 is connected to a surface of the support portion 32 located in the accommodating space 321. Specifically, the supporting portion 32 is annularly disposed so as to facilitate an operator to hold the propeller 30 during installation, and meanwhile, the motor rotor 40 can be circumferentially arranged along the outer surface of the supporting portion 32 at intervals so as to better rotate in relative coupling with the motor stator 20. And this paddle portion 31 is located the surface connection of accommodation space 321 with supporting part 32 to can guarantee the area of contact of paddle portion 31 and supporting part 32, in order to guarantee the stability that both are connected, make paddle portion 31 be located accommodation space 321 simultaneously, and then avoid paddle portion 31 to expose and receive the striking easily and damage, in order to improve the holistic life of screw 30.

In an embodiment of the present application, referring to fig. 6, the motor stator 20 is disposed at a side of the housing 10 facing the mounting channel 11. Specifically, this motor stator 20 sets up in one side of casing 10 towards installation passageway 11, so that motor stator 20 is more close to motor rotor 40 to in order to improve the relative coupling pivoted effect of both, so that motor rotor 40 can drive screw 30 better and rotate, and then guarantee propeller 100's propulsion effect.

Further, the motor stator 20 is of an integral structure with the housing 10. Wherein, in order to further guarantee that motor stator 20 is fixed in the stability of casing 10, this motor stator 20 can form one deck encapsulating layer 50 through the mode of embedment so that it and casing 10 structure as an organic whole to guarantee the stability after motor stator 20 installs, guarantee the waterproof nature to motor stator 20 with the colleague, with the life who improves motor stator 20, and saved extra installation flow. Of course, the motor stator 20 may also be welded or injection molded with the housing 10 as a single structure, and may be selected by those skilled in the art, and will not be described herein.

In an embodiment of the present application, referring to fig. 6, a mounting cavity is provided in the housing 10, and the motor stator 20 is disposed in the mounting cavity. Wherein, this casing 10 is inside to be formed with the installation cavity to can install motor stator 20 in the installation cavity, with stability and waterproof nature after guaranteeing motor stator 20 installation, protect motor stator 20 simultaneously, with the normal life who guarantees motor stator 20. In addition, this casing 10 can be seted up two and irritate and seal 13 to after motor stator 20 locates the installation intracavity, operating personnel can be through carrying out the injecting glue embedment to the installation intracavity from a pouring seal 13 department, when glue spills over the back from another pouring seal 13, then show this motor stator 20 embedment integrated into one piece in the installation intracavity of casing 10 this moment. Of course, the motor stator 20 may also be fixed by providing another fixing structure in the mounting cavity, so as to also ensure the stability of the motor stator 20 after being mounted in the mounting cavity.

Further, the outer wall surface of the housing 10 is provided with a plug port 12 electrically connected to the mounting cavity. Wherein, the outer wall of this casing 10 is seted up the grafting port 12 of intercommunication installation cavity, and this grafting port 12 and motor stator 20 electrical property intercommunication simultaneously to the user's accessible is pegged graft in this grafting port 12 department with power connection, for motor stator 20 supplies power, thereby makes motor stator 20 produce the magnetic field and then drive motor rotor 40 and rotate. The plug port 12 is disposed on an outer wall surface of the housing 10 to facilitate connection between a user and a power source, thereby improving convenience of user operation.

In an embodiment of the present application, referring to fig. 1 to 3, the propeller 100 further includes a flow guide cover 60, the installation channel 11 has a water inlet 111 and a water outlet 112, and the flow guide cover 60 is connected to the propeller 30 and located at one end of the water outlet 112. In order to further improve the effect of the propeller 100 pushing water flow, the flow guide cover 60 may be connected to the propeller 30, and the flow guide cover 60 is located at one end of the water outlet 112 of the propeller 30, so as to guide the water flow to flow out toward the water outlet 112 more quickly. And this drainage cover 60 can be connected in screw 30 through buckle or threaded connection etc. detachable mode to the later stage is maintained the change to drainage cover 60, and this drainage cover 60 can be the conical setting, and the surface of drainage cover 60 can be the setting of rounding off cambered surface, with the guide effect that further improves drainage cover 60. In addition, a handling hole 61 can be formed in the drainage cover 60, so that an operator can drive the drainage cover 60 to be connected to the propeller 30 by inserting an external tool into the handling hole 61 during installation, the operation of the operator is facilitated, and the installation efficiency is improved.

The invention further provides a water running device, which comprises a propeller 100, the specific structure of the propeller 100 refers to the above embodiments, and the water running device adopts all technical solutions of all the above embodiments, so that the water running device at least has all the beneficial effects brought by the technical solutions of the above embodiments, and details are not repeated herein. Wherein, the water running equipment can be an electric surfboard, a water motorcycle or a small boat and the like.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims

1. A propeller, comprising:

the shell surrounds and forms an installation channel with two open ends;

the motor stator is fixedly arranged on the shell;

2. The propeller as claimed in claim 1, wherein the propeller includes a blade portion and a support portion circumferentially surrounding the blade portion, the blade portion defines the rotation shaft hole, and the rotation bracket defines the rotation shaft.

3. The propeller as recited in claim 2, wherein the rotating bracket further includes a connecting portion and a fixing portion connected to each other, the fixing portion is connected to the housing, and the rotating shaft is inserted through the connecting portion and into the rotating shaft hole of the blade portion.

4. A propeller as in claim 3, wherein the fixed portion is circumferentially disposed around an outer side of the connecting portion.

5. The propeller as claimed in claim 3, wherein the connecting portion comprises a connecting column and a plurality of guiding pieces, the connecting column is provided with a through hole, the rotating shaft passes through the through hole to be inserted into the rotating shaft hole, and the plurality of guiding pieces are arranged on the outer surface of the connecting column in a spaced ring manner.

6. The propeller as claimed in any one of claims 2 to 5, wherein the motor rotor is formed with a potting layer on an outer wall of the support portion by potting so that the motor rotor and the propeller are integrated;

and/or the blade part and the supporting part are of an integral structure;

7. The propeller of claim 6, wherein the motor stator is of unitary construction with the housing.

8. The propeller of claim 7, wherein a mounting cavity is defined in the housing, the motor stator being disposed within the mounting cavity.

9. The propeller of any one of claims 1 to 5, further comprising a flow directing hood, the mounting channel having a water inlet and a water outlet, the flow directing hood being connected to the propeller and located at one end of the water outlet.

10. A water craft comprising a propeller as claimed in any one of claims 1 to 9.