CN210793589U

CN210793589U - Underwater propeller and underwater combined propeller

Info

Publication number: CN210793589U
Application number: CN201921040462.0U
Authority: CN
Inventors: 侯鹏; 徐岷
Original assignee: Shenzhen Qianshuixia Innovation Power Technology Co ltd
Current assignee: Shenzhen Qianshuixia Innovation Power Technology Co ltd
Priority date: 2019-07-05
Filing date: 2019-07-05
Publication date: 2020-06-19
Anticipated expiration: 2029-07-05

Abstract

The utility model discloses an underwater propeller, which comprises a propelling component, a battery box and a handle connected between the propelling component and the battery box, wherein at least one of two connecting ends of the handle is detachably connected with a connecting object connected with the handle; the propelling assembly comprises a shell, an electric regulation control board, a motor and a propeller, wherein the electric regulation control board is electrically connected with the motor and both of the electric regulation control board and the motor are positioned in the shell, and an output shaft of the motor penetrates out of the shell to be used for fixing the propeller positioned outside the shell; the handle is provided with a first pushing button electrically connected with the electric regulation control panel, and a battery electrically connected with the electric regulation control panel is arranged in the battery box. The utility model discloses still disclose an underwater combined propeller, this underwater combined propeller include bandage and two as above underwater combined propeller. The utility model discloses a but underwater propeller one-hand operation has reduced the operation degree of difficulty to dismouting convenient to carry.

Description

Underwater propeller and underwater combined propeller

Technical Field

The utility model relates to an underwater operation technical field, in particular to underwater propeller and underwater combined propeller.

Background

When people dive and swim, people can easily move underwater and obtain a larger moving range by means of underwater propelling equipment in order to save labor and more easily adjust self postures.

The existing underwater propeller is that a battery and a propeller are integrally assembled in a shell of the existing underwater propeller, the battery is troublesome to disassemble and replace, and the integral design requires waterproof sealing through the shell of the whole propeller, so that the existing underwater propeller is large in size and heavy in weight and inconvenient to carry; in addition, the underwater propeller is usually provided with two handles to carry out the operation of holding by two hands, and if the underwater propeller is operated by one hand, the operation is inconvenient and the operation difficulty is large by means of the assistance of an auxiliary tool.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing an underwater propulsor aims at solving the problem that current underwater propulsor carries inconveniently and the operation degree of difficulty is big.

In order to achieve the above object, the present invention provides an underwater propeller, which comprises a propelling component, a battery box and a handle connected between the propelling component and the battery box, wherein at least one of two connecting ends of the handle is detachably connected with a connecting object connected with the handle; the propelling assembly comprises a shell, an electric regulation control board, a motor and a propeller, wherein the electric regulation control board is electrically connected with the motor and both of the electric regulation control board and the motor are positioned in the shell, and an output shaft of the motor penetrates out of the shell to be used for fixing the propeller positioned outside the shell; the handle is provided with a first pushing button electrically connected with the electric regulation control panel, and a battery electrically connected with the electric regulation control panel is arranged in the battery box.

Preferably, the handle and the shell are integrally formed, a rotatable locking knob is arranged at the connecting end of the handle and the battery box, which is detachably connected, and a threaded hole for being in threaded fit with a threaded rod of the locking knob is formed in the position, corresponding to the locking knob, of the battery box; the connection position of the handle and the battery box is respectively provided with a pair of electrodes which can be abutted to form electric connection.

Preferably, the battery compartment and the handle each comprise an annular portion arranged around the electrode, and two corresponding annular portions are inserted to form a sealing fit.

Preferably, the handle is provided with a speed regulating switch electrically connected with the electrically-adjustable control board.

Preferably, the battery box further comprises a battery control board, a battery switch and an electric quantity display which are positioned in the battery box, and the battery is electrically connected with the electrically-adjusted control board through the battery control board; the battery switch and the electric quantity displayer are both electrically connected with the battery control board, and the battery box is respectively provided with a switch area for triggering the battery switch and a display area for supplying the electric quantity displayer to display electric quantity.

Preferably, the battery box further comprises a heat dissipation plate located in the battery box, and the heat dissipation plate is connected with the battery box to isolate the inside of the battery box into a sealed space for accommodating the battery, the battery control board, the battery switch and the electric quantity display and a heat dissipation space for communicating the outside.

Preferably, the battery case with the appearance of casing is streamlined, electricity is transferred control panel and motor and is equipped with seal shell respectively, the both ends of casing divide and are equipped with a plurality of limbers.

Preferably, the outer periphery of the propeller is covered with a cover connected with the housing to form a ducted propeller.

Preferably, still include with the casing can dismantle the double handle subassembly of being connected, the double handle subassembly include two in the handle of casing both sides, two be equipped with on one of them of handle with the second that the electricity transfer control panel is connected impels the button.

The utility model also provides an underwater combined propeller, this underwater combined propeller include bandage and two as above underwater propeller, the bandage include the accepting part and certainly annular binding portion that the accepting part stretches out to both sides, two underwater propeller's battery case respectively the butt in the both sides of accepting part are in order to supply the annular binding portion is bound around binding.

The beneficial effects of the utility model reside in that: in this underwater propulsor, the battery and the motor of battery case are connected with the electricity control panel electricity respectively, and the battery case can provide electric power for motor drive. When people dive in water, the user holds the grip and presses the first propelling key on the grip, and the electric regulation control board controls the motor to operate so as to drive the propeller to rotate, so that forward propelling force is generated. The handle is connected between propulsion subassembly and battery case, can realize that the one hand grips the handle in order to control underwater propulsor, need not with the help of appurtenance auxiliary operation, has reduced the operation degree of difficulty, and easy operation is convenient. At least one of the two connecting ends of the handle is detachably connected with a connecting object connected with the handle, so that the underwater propeller can be disassembled and assembled, and the underwater propeller can be disassembled and separated during daily carrying, thereby reducing the occupied space and being easy and convenient to carry; when in use, the utility model is assembled, which is simple and convenient. When people dive or swim, the underwater propeller can advance in a labor-saving way and is convenient for adjusting the diving posture.

Drawings

Fig. 1 is a schematic structural view of an underwater propeller according to an embodiment of the present invention;

FIG. 2 is a schematic structural view of a portion of the underwater propeller shown in FIG. 1;

FIG. 3 is a schematic structural view of another part of the underwater propeller shown in FIG. 1;

FIG. 4 is a schematic view of the internal structure of the battery case of the underwater propeller shown in FIG. 1;

fig. 5 is a schematic structural view of an underwater combined propeller according to an embodiment of the present invention;

fig. 6 is a schematic structural view of an embodiment of the present invention in which an underwater combined propeller is applied to a power floating plate;

fig. 7 is a schematic structural view of an embodiment of the present invention in which an underwater propeller is applied to a dynamic surfboard;

fig. 8 is a schematic structural view of an embodiment of the present invention, in which the underwater propeller is applied to a power boat.

Detailed Description

In the following, the embodiments of the present invention will be described in detail with reference to the accompanying drawings, and obviously, the described embodiments are only some embodiments, not all embodiments, of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

The utility model provides an underwater propeller 100, as shown in fig. 1 to 4, the underwater propeller 100 comprises a propelling component 110, a battery box 120 and a handle 130 connected between the propelling component and the battery box, at least one of two connecting ends of the handle 130 is detachably connected with a connecting object connected with the handle; the propulsion assembly 110 comprises a shell 111, an electric regulation control board 112, a motor 113 and a propeller 114, wherein the electric regulation control board 112 is electrically connected with the motor 113, the electric regulation control board and the motor 113 are both positioned in the shell 111, and an output shaft of the motor 113 penetrates out of the shell 111 to be used for fixing the propeller 114 positioned outside the shell 111; the first push button 10 electrically connected to the electrical tuning control board 112 is disposed on the handle 130, and the battery 121 electrically connected to the electrical tuning control board 112 is disposed in the battery box 120.

In this embodiment, as shown in fig. 1, the underwater propulsion device 100 of the present invention is an underwater propulsion device, and the human body can advance rapidly when diving or swimming by the aid of the underwater propulsion device 100. In the underwater vehicle 100, as shown in fig. 1 to 3, the grip 130 is connected between the propelling unit 110 and the battery box 120, and at least one of the two connecting ends of the grip 130 is detachably connected to the connecting object, and the connecting form may be: spring clips are respectively arranged on two opposite sides of the handle 130, clamping grooves are respectively arranged on two corresponding side faces of a connection object, and the spring clips are pressed to enable clamping parts of the spring clips to be respectively clamped into the clamping grooves on the two side faces, so that the handle 130 and the connection object can be detachably connected. As shown in fig. 4, a battery 121 is disposed in the battery box 120, and the battery 121 is electrically connected to the electrically adjustable control board 112 for providing power for the operation of the motor 113 of the propulsion assembly 110. The first push button 10 is disposed on the grip 130, the electrically-controlled panel 112 and the motor 113 are both disposed in the housing 111, an output shaft of the motor 113 penetrates out of the housing 111, and the propeller 114 is disposed outside the housing 111 and mounted on the output shaft of the motor 113. The first push button 10 is connected with the electric regulation control panel 112 through a wire, the electric regulation control panel 112 is an electronic speed regulator, the electric regulation control panel 112 is arranged at one end of the body of the motor 113 and is connected with the motor 113 through a wire, and the rotating speed of the motor 113 can be adjusted according to a control signal of the first push button 10. That is, pressing the first push button 10 can change the voltage parameter to feed back to the electric tuning control board 112, so as to control the operation of the motor 113, and the propeller 114 rotates along with the output shaft of the motor 113 to generate the push force. The underwater propeller 100 has an external dimension of 385 x 360 x 182mm, a weight of 3.6kg, a selected power of the motor 113 of 600W, a blade diameter of the propeller 114 of 15cm, a high idle speed of 1200rpm of the propeller 114, and a low idle speed of 86 rpm. The underwater propeller 100 can generate thrust of at least 10kgf in water at a thrust speed of 1.2-1.8 m/s and a submergence depth of 50 m. When a person uses the underwater vehicle 100 for diving in water, the person holds the grip 130 with one hand and presses the first propulsion button 10 on the grip 130, and the electrically-controlled control board 112 controls the motor 113 to operate to drive the propeller 114 to rotate, so as to generate forward thrust. The handle 130 is connected between the propelling component 110 and the battery box 120, so that the handle 130 can be gripped by a single hand to control the underwater propeller without auxiliary operation of auxiliary tools, the operation difficulty is reduced, and the operation is simple and convenient. At least one of the two connecting ends of the handle 130 is detachably connected with a connecting object connected with the handle, the connecting object is the propelling component 110 or the battery box 120, and the components of the underwater propeller 100 can be detached, so that the underwater propeller 100 can be detached and separated into a plurality of components when being carried in daily life, the occupied space is reduced, and the carrying is easy and convenient; when in use, the utility model is assembled, which is simple and convenient. When people dive or swim, people can advance with less labor by being pushed by the underwater propeller 100, and the diving posture can be conveniently adjusted.

In addition, as shown in fig. 1 and 2, the handle 130 may further include a connecting portion 20 for connecting an external device, the connecting portion 20 is a plurality of connecting plates arranged side by side at intervals, each connecting plate has a connecting hole, and the connecting holes are connected one by one. The external device may be provided with a connecting portion 20 corresponding to the handle 130, and a plurality of connecting plates on the external device are inserted into gaps between the connecting plates of the handle 130 in a staggered manner, and are screwed with the nuts through the connecting holes by screws to lock. The external equipment can be camera under water, for example GoPro, connects the camera under water on underwater propulsor 100 and can shoot under water, and the camera under water need not handheld, is fixed in difficult dropping on handle 130 to the camera is installed in the front end of underwater propulsor 100 under water, is convenient for shoot aquatic scenery, and the shooting effect is preferred, thereby strengthens user's use and experiences.

In addition to the above functions, the underwater vehicle 100 may be installed on some water devices to realize various application scenarios, such as a dynamic floating plate, a dynamic surfboard, a dynamic boat, and the like. As shown in fig. 6, the two underwater propellers 100 are horizontally disposed opposite to each other, the battery boxes 120 of the two underwater propellers are butted, the propulsion units 110 are respectively disposed at two sides, the floating plate 200 is disposed above the two underwater propellers 100, the two underwater propellers 100 and the floating plate 200 are connected and bound by the quick-mounting strap 300, and the handles 130 of the two underwater propellers 100 are respectively gripped by two hands to provide propulsion power to people on the water surface; as shown in fig. 7, the powered surfboard is assembled by installing the propulsion assembly 110 of the underwater propulsion device 100 and the grip 130 on the bottom of the surfboard 400 through a specific adapter, and the surfboard 400 can obtain propulsion power by connecting a power supply; in the power boat shown in fig. 8, the propulsion assembly 110 and the grip 130 of the underwater propulsion device 100 are mounted at the tail of the hull 500 through a special adapter, and a power supply is connected to obtain propulsion power for the hull 500.

In a preferred embodiment of the present invention, as shown in fig. 1 to 4, the handle 130 is integrally formed with the housing 111, the rotatable locking knob 30 is disposed on the connecting end of the handle 130 detachably connected to the battery box 120, and a threaded hole for screw-fitting with the threaded rod of the locking knob 30 is disposed on the battery box 120 corresponding to the locking knob 30; a pair of electrodes 40 are provided at the connecting positions of the grip 130 and the battery case 120, respectively, so as to be in contact with each other to form an electrical connection. As shown in fig. 1 to 3, the grip 130 is an annular grip 130 having an inner ring, and the grip 130 is integrally formed with the housing 111 and extends from one side of the housing 111. Battery case 120 is located the extending direction of handle 130, and handle 130 can dismantle through locking knob 30 with battery case 120 and be connected, specifically, the knob of locking knob 30 is located the inboard of handle 130, and the threaded rod of locking knob 30 wears to establish handle 130 with the screw hole screw-thread fit on the battery case 120, can realize the screw-threaded rod through rotatory knob on battery case 120 screw hole department screw up with loosen, connection structure is simple, but battery case 120 and handle 130 quick assembly disassembly, light convenience. The handle 130 is connected to the electrode 40 of the battery box 120 in an abutting manner, so that the power transmission between the battery in the battery box 120 and the electrically-controlled panel 112 can be realized. As shown in fig. 3 and 4, the positive electrode and the negative electrode of the grip 130 are respectively disposed on both sides of the locking knob 30, the positive electrode and the negative electrode of the battery case 120 are respectively disposed on both sides of the screw hole, the grip 130 and the positive electrode and the negative electrode of the battery case 120 are correspondingly abutted, and the electrodes 40 are stably abutted by locking the locking knob 30.

In a preferred embodiment of the present invention, as shown in fig. 3 and 4, the battery case 120 and the handle 130 respectively include an annular portion 50 disposed around the electrode 40, and two corresponding annular portions 50 are inserted to form a sealing engagement. The battery case 120 and the handle 130 are provided with a ring portion 50 at the electrode 40 for inserting and forming a sealing fit for sealing and waterproofing the electrode 40 in contact, and the ring portion 50 may be a sealing rubber ring. Specifically, the annular portion 50 on the battery case 120 is a first annular portion, the annular portion 50 on the handle 130 is a second annular portion, the outer diameter of the second annular portion is equal to the inner diameter of the first annular portion, when the second annular portion is inserted into the first annular portion, the electrode 40 surrounded by the first annular portion extends into the second annular portion and abuts against the electrode 40 surrounded by the second annular portion, and the second annular portion is in sealing fit with the first annular portion, so that the electrode 40 abutted against the two phases is waterproof, and the waterproof effect is good.

In a preferred embodiment of the present invention, as shown in fig. 1 to 3, a speed adjusting switch 60 electrically connected to the electric adjusting control board 112 is disposed on the handle 130. The speed regulating switch 60 is a toggle switch, the maximum rotating speed of the limiting motor 113 can be adjusted by toggling a switch handle of the speed regulating switch 60 up and down, the speed regulating switch 60 is connected with the electrically-adjustable control board 112 through a lead, and the rotating speed of an output shaft of the limiting motor 113 is controlled mainly through limiting voltage, so that the propeller 114 generates different thrust, and different forward speeds are obtained.

In a preferred embodiment of the present invention, as shown in fig. 4, the battery box 120 further includes a battery control board 122, a battery switch 123 and an electric quantity display 124, which are located in the battery box 120, and the battery 121 is electrically connected to the electric regulation control board 112 through the battery control board 122; the battery switch 123 and the power display 124 are electrically connected to the battery control board 122, and the battery box 120 is provided with a switch area for triggering the battery switch 123 and a display area for displaying power by the power display 124. The battery switch 123 and the power display 124 are respectively connected with the battery control board 122 through wires, and the switch area and the display area are both arranged at the rear end of the battery box 120, so that the operation and observation of a user are facilitated. The battery switch 123 is used for controlling the on-off of the power transmission of the battery 121, and before the battery is replaced, the battery switch 123 is triggered at the switch area to enable the power-off state between the battery 121 and the electric regulation control board 112. The power display 124 is used for displaying the stored power of the battery in the battery box 120, and the user can observe the power of the battery through the power display 124, so that the battery can be replaced in time, and the cruising ability is improved.

In a preferred embodiment of the present invention, as shown in fig. 4, the battery case 120 further includes a heat dissipation plate 125 located inside the battery case 120, and the heat dissipation plate 125 is connected to the battery case 120 to separate the inside of the battery case 120 into a sealed space 1 for accommodating the battery 121, the battery control board 122, the battery switch 123 and the power display 124 and a heat dissipation space 2 for communicating with the outside. The heat dissipation plate 125 can be an aluminum plate, the heat dissipation plate 125 is connected with the battery box 120 and is subjected to glue sealing treatment, the battery control panel 122, the battery switch 123 and the electric quantity display 124 are all located in the sealed space 1, water can be prevented, the service life can be prolonged, the heat dissipation plate 125 can conduct heat to heating devices such as the battery 121, the temperature of the battery 121 can be sufficiently reduced, and thermal runaway of the battery 121 due to excessive heat accumulation can be avoided; the battery case 120 is provided with a plurality of through holes 3 to communicate the heat dissipation space 2 with the outside, and water enters and exits the heat dissipation space 2 from the through holes 3 to take away heat from the heat dissipation plate 125, so that the heat dissipation speed is increased and the heat dissipation effect is improved.

In a preferred embodiment of the present invention, as shown in fig. 1 to 4, the battery box 120 and the casing 111 are streamline, the electric tuning control board 112 and the motor 113 are respectively sleeved with a sealing shell, and two ends of the casing 111 are respectively provided with a plurality of water holes 4. The front and rear ends of the battery case 120 and the casing 111 of the propulsion assembly 110 are both streamlined, and the surfaces of the battery case 120 and the casing 111 are smooth and regular without large undulations and sharp edges, and the whole body is shaped like a water drop. The battery case 120 and the housing 111 are formed in a streamline shape to reduce resistance to the underwater propeller 1000 when it advances in water, thereby increasing the propelling speed of the underwater propeller 100. And, the electric regulation control panel 112 and the motor 113 are located in the shell 111, and are respectively sleeved with a sealed shell for water prevention, and a plurality of water through holes 4 are respectively arranged at the front end and the rear end of the shell 111, when the underwater propeller 100 is used for advancing, water flow enters the shell 111 from the water through holes 4 located at the front end of the shell 111 and flows out from the water through holes 4 located at the rear end of the shell 111, on one hand, the flow resistance of water is reduced, and on the other hand, water enters the shell 111 to perform heat dissipation and cooling on heating devices such as the electric regulation control panel 112 and the motor 113.

In a preferred embodiment of the present invention, as shown in fig. 1 and 2, the outer periphery of the propeller 114 is covered with a cover 70 connected to the housing 111 to form a ducted propeller 114. The outer cover 70 and the shell 111 are fixedly connected through screws, the propeller 114 adopts a ducted propeller 114, namely, a clearance between the outer cover 70 and blades of the propeller 114 is small to form a duct, and the tips of the blades of the propeller 114 are limited by the duct, so that the impact noise is small. Under the same power consumption, the ducted propeller 114 generates more thrust than the propeller 114 with the same diameter and arranged in isolation; meanwhile, due to the ring-included function of the duct, the structure is compact, the pneumatic noise is low, and the use safety is good.

In a preferred embodiment of the present invention, as shown in fig. 1, the present invention further comprises a dual-handle assembly detachably connected to the housing 111, the dual-handle assembly comprises two handles 140 located at two sides of the housing 111, and one of the two handles 140 is provided with a second push button 80 connected to the electrical modulation control board 112. The handles 140 are symmetrically disposed and located on the left and right sides of the underwater propeller 100 in the advancing direction thereof, respectively. The two handles 140 are provided with concave connecting portions adapted to the contour of the housing 111, and the upper and lower ends of the concave connecting portions of the two handles are respectively and correspondingly fixed by screws to wrap the housing 111, so that the two handles are fixed on the housing 111. The second push button 80 is disposed on one of the two handles 140, a connector connected to the second push button 80 is disposed on an inner side wall of the concave connecting portion of the handle 140 for abutting against the housing 111, an interface electrically connected to the electrically adjustable control board 112 is disposed on the housing 111 corresponding to the connector, and when the handle 140 is fixed on the housing 111, the connector is connected to the interface. The second push button 80 has the same function as the first push button 10, and the motor 113 can be activated by pressing the second push button 80 to rotate the propeller 114 to generate forward thrust. In this embodiment, the underwater vehicle 100 can realize the operation and propulsion with both hands by installing the external double-handle assembly on the housing 111, so as to increase the operation mode of the underwater vehicle, and enable the user to feel different operation experiences.

The utility model discloses a further provide a combination propeller under water, as shown in fig. 5, this combination propeller under water includes bandage 600 and two underwater propulsors 100, and bandage 600 includes accepting part 610 and the annular binding portion 620 that stretches out to both sides from accepting part 610, and the battery case 120 of two underwater propulsors 100 butt respectively is bound in the both sides of accepting part 510 for annular binding portion 620 encircles. The specific structure of the underwater thruster 100 refers to the above embodiments, and since the underwater combined thruster adopts all the technical solutions of all the above embodiments, the underwater combined thruster at least has all the technical effects brought by the technical solutions of the above embodiments, and details are not repeated herein. In the underwater combined propeller, two underwater propellers 100 are located on the same plane, two propulsion assemblies 110 are respectively located at two ends, and two battery boxes 120 are butted and located at the middle position. The binding band 600 is used for connecting and binding the two battery boxes 120, the bearing part 610 of the binding band 600 is located between the two battery boxes 120, and the annular binding part 620 of the binding band 600 is arranged at intervals on each side of the bearing part 610 so as to surround and bind the two ends of the battery boxes 120, thereby realizing the connection and fixation between the two underwater propellers 100. In the underwater combined propeller of the embodiment, the two underwater propellers 100 are bound by the binding band 600 to form double thrust force by assembling, and a user respectively holds the grips 130 of the two underwater propellers with both hands to operate, so that the driving force is more sufficient, the pushing speed is faster, and the requirement of larger power can be met; and only need use to bandage 600 and bind two underwater propulsors 100, simple structure, convenient to carry can realize fast assembly.

The above is only the part or the preferred embodiment of the present invention, no matter the characters or the drawings can not limit the protection scope of the present invention, all under the whole concept of the present invention, the equivalent structure transformation performed by the contents of the specification and the drawings is utilized, or the direct/indirect application in other related technical fields is included in the protection scope of the present invention.

Claims

1. An underwater propeller is characterized by comprising a propelling component, a battery box and a handle connected between the propelling component and the battery box, wherein at least one of two connecting ends of the handle is detachably connected with a connecting object connected with the handle; the propelling assembly comprises a shell, an electric regulation control board, a motor and a propeller, wherein the electric regulation control board is electrically connected with the motor and both of the electric regulation control board and the motor are positioned in the shell, and an output shaft of the motor penetrates out of the shell to be used for fixing the propeller positioned outside the shell; the handle is provided with a first pushing button electrically connected with the electric regulation control panel, and a battery electrically connected with the electric regulation control panel is arranged in the battery box.

2. The underwater propeller as claimed in claim 1, wherein the grip is integrally formed with the housing, a rotatable locking knob is provided on a connection end of the grip detachably connected to the battery case, and a threaded hole for screw-fitting with a threaded rod of the locking knob is provided on the battery case at a position corresponding to the locking knob; the connection position of the handle and the battery box is respectively provided with a pair of electrodes which can be abutted to form electric connection.

3. An underwater vehicle as claimed in claim 2, wherein the battery compartment and the handle each comprise an annular portion disposed around the electrodes, the two respective annular portions being arranged to form a sealing engagement.

4. The underwater propeller as claimed in claim 1, wherein a speed regulating switch electrically connected with the electrically-regulated control board is arranged on the grip.

5. The underwater propulsor of claim 1, wherein the battery box further comprises a battery control board, a battery switch and a power display located within the battery box, the battery being electrically connected to the electrically regulated control board through the battery control board; the battery switch and the electric quantity displayer are both electrically connected with the battery control board, and the battery box is respectively provided with a switch area for triggering the battery switch and a display area for supplying the electric quantity displayer to display electric quantity.

6. The underwater propulsion of claim 5, wherein the battery box further includes a heat dissipation plate located within the battery box, the heat dissipation plate being connected with the battery box to isolate the inside of the battery box into a sealed space for accommodating the battery, the battery control board, the battery switch and the power display and a heat dissipation space for communicating with the outside.

7. The underwater propeller as claimed in claim 1, wherein the battery box and the shell are both streamlined, the electrically-controlled board and the motor are respectively sleeved with a sealed shell, and two ends of the shell are respectively provided with a plurality of water through holes.

8. Underwater propulsion according to claim 1, characterised in that the peripheral envelope of the propeller is provided with an outer envelope connected to the casing to form a ducted propeller.

9. The underwater propeller of claim 1, further comprising a double-handle assembly detachably connected to the housing, wherein the double-handle assembly comprises two handles located at two sides of the housing, and one of the two handles is provided with a second propelling button connected to the electric control board.

10. An underwater combined propeller, comprising a harness and two underwater propellers as claimed in any one of claims 1 to 9, wherein the harness comprises a receiving part and annular binding parts extending from the receiving part to both sides, and battery boxes of the two underwater propellers are respectively abutted against both sides of the receiving part so as to allow the annular binding parts to be bound around.