CN210478964U - Propulsion system of electric surfboard and electric surfboard with same - Google Patents

Abstract

The utility model provides an advancing system of electronic surfboard and have its electronic surfboard, advancing system is located the mounting groove that the casing subassembly downside afterbody of electronic surfboard set up, advancing system includes motor, kuppe and mounting panel, the battery electricity in motor and the battery compartment is connected, the output shaft of motor is connected with the one end of transmission shaft, the transmission shaft is connected with the hot cover of impeller, the impeller sets up in the kuppe, inside cavity of kuppe, the runner that is equipped with the water supply and flows through, the kuppe has water inlet and delivery port, the water inlet of kuppe forms on the mounting panel, the delivery port of kuppe is located casing subassembly's afterbody. Electronic surfboard's propulsion system, simple structure has reduced the setting of accessories, has reduced electronic surfboard's propulsion system's weight, connects stably, the assembly is swift, has reduced manufacturing cost, improves the convenience of overhauing or changing.

Description

Propulsion system of electric surfboard and electric surfboard with same

Technical Field

The utility model relates to a sport equipment technical field on water, concretely relates to electronic surfboard, in particular to propulsion system of electronic surfboard and have its electronic surfboard.

Background

Surfing exercise is increasingly popular due to its thrilling stimulation and ability to effectively exercise the body. The traditional surfboard is an unpowered surfboard, the surfboard can travel only by means of the thrust of wind waves, and when no wind waves or small wind waves exist, the surfboard loses the due effect.

In order to enable surfers to surf fully even when no or small waves exist, a dynamic surfboard is available in the market at present, and the dynamic surfboard can surf on the sea surface and can also run on a flat water surface under the action of a power device.

Generally, a power surfboard includes a housing assembly, a power device, an empennage, and the like, wherein the housing assembly is a prolate elliptical streamline hollow structure, a large body cover is arranged at the middle position of the upper surface of the housing assembly, the power device is arranged at the hollow part of the housing, a wind deflector is further arranged on the housing assembly, the empennage is arranged below the housing assembly, and the power device generally provides power through a gasoline engine or a diesel engine, and the like.

The power plant using a gasoline engine or a diesel engine as a surfboard has the following drawbacks: firstly, the gasoline engine or the diesel engine has large volume and heavy weight, and the cabin of the surfboard needs to be large in size in order to accommodate the gasoline engine or the diesel engine, so that the whole surfboard has large size and mass and is inconvenient to carry and use; secondly, water easily enters the engine room of the engine to damage the engine in the using process; thirdly, toxic and harmful gases are easily generated by combustion of diesel oil, gasoline and the like, so that the environment is polluted, the body health of a user is damaged, and the use experience of the user is reduced; fourthly, the structure of the surfboard is complicated, especially the structure of the propulsion system is complicated, so that the cost of the surfboard is high.

The present application is particularly proposed to solve the above problems.

SUMMERY OF THE UTILITY MODEL

In view of the above, the present invention is directed to a propulsion system of an electric surfboard and an electric surfboard having the same, so as to solve the problems of the existing power surfboard that the size and weight are large, the use is inconvenient, and the carrying is not easy; the engine is easy to be damaged by water inflow; the fuel burning pollutes the environment, reduces the user experience, and the structure is complicated, the cost is higher.

In order to achieve the above purpose, the technical scheme of the utility model is realized like this:

the utility model provides an advancing system of electronic surfboard, the casing subassembly downside afterbody of electronic surfboard is equipped with the mounting groove, advancing system is located in the mounting groove, the transversal setting of personally submitting "U" type of mounting groove, advancing system includes motor, kuppe and mounting panel, the battery electricity in motor and the battery compartment is connected, the output shaft of motor is connected with the one end of transmission shaft, the transmission shaft is connected with the hot cover of impeller, the impeller sets up in the kuppe, inside cavity of kuppe, the runner that is equipped with the water supply and flows through, the kuppe has water inlet and delivery port, the water inlet of kuppe forms on the mounting panel, the delivery port of kuppe is located casing subassembly's afterbody.

Furthermore, the kuppe includes first kuppe and second kuppe, first kuppe one end with the mounting panel is connected, the other end of first kuppe pass through the flange with the second kuppe is connected, sets up the delivery port of kuppe on the second kuppe.

Further, the mounting panel includes first mounting panel and second mounting panel, first mounting panel with the second mounting panel is connected perpendicularly, first mounting panel covers on the mounting groove, the motor is installed on the second mounting panel.

Further, a reinforcing plate is arranged at the joint of the first mounting plate and the second mounting plate.

Further, the impeller is made of engineering plastics.

Furthermore, a fixed impeller is arranged in the second air guide sleeve and fixedly connected with the shell of the second air guide sleeve, a fixed groove is formed in the center of the fixed impeller, a bearing is arranged in the fixed groove, a bearing hole is formed in the bearing, the transmission shaft comprises an insertion part, and the insertion part penetrates through the bearing hole and is rotatably connected with the second air guide sleeve.

Further, the fixed slot includes installation department and water conservancy diversion portion, bearing detachable fixes the installation department, water conservancy diversion portion sets up the rear side of installation department, water conservancy diversion portion is toper platform or conical, the cross-sectional area of water conservancy diversion portion front end is greater than the cross-sectional area of rear end.

Furthermore, an accommodating part is arranged in the second air guide sleeve, the accommodating part is arranged on one side close to the first air guide sleeve, and an impeller on a transmission shaft is arranged in the accommodating part.

Further, set up the battery compartment in the casing subassembly to set up removable battery or can change the group battery in the battery compartment, the mounting groove sets up the downside of casing subassembly rear end, the motor is fixed in the mounting groove, set up the leading water pipe on the kuppe, the leading water pipe guides the rivers in the kuppe to motor department blowout.

Compared with the prior art, the propulsion system of electronic surfboard have following advantage:

(1) electric surfboard's propulsion system, realize the body coupling of impeller and transmission shaft through the heat jacket, connect stably, the assembly is swift, the transmission is reliable, the impeller setting after will installing is in the second kuppe, and the fixed impeller contact in transmission epaxial impeller and the second kuppe, increased the stability of intaking in the kuppe and going out water, provide bigger, more stable propulsive force for electric surfboard, improve electric surfboard's propulsion system job stabilization nature.

(2) Propulsion system of electronic surfboard, simple structure has reduced the setting of accessories, has reduced the propulsion system's of electronic surfboard weight, has reduced manufacturing cost to do not need to change the pump shaft when examining the change impeller, also need not open the piggyback pod, make maintenance work become easier.

(3) Propulsion system of electronic surfboard, fix the motor in the mounting groove of casing unit's downside, the delivery port of kuppe can pass through the mounting groove is followed electronic surfboard afterbody outwards drains, sets up the leading water pipe at the afterbody of kuppe, the leading water pipe guides the blowout to motor department with the rivers in the kuppe, plays the cooling action to the motor.

Another object of the present invention is to provide an electric surfboard, which has the above-mentioned propulsion system.

The advantages of the electric surfboard and the propulsion system of the electric surfboard are the same as those of the prior art, and are not described herein again.

Drawings

The accompanying drawings, which form a part hereof, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without undue limitation. In the drawings:

fig. 1 is a schematic structural view of an electric surfboard according to an embodiment of the present invention;

fig. 2 is a front view of a propulsion system for an electric surfboard according to an embodiment of the present invention;

fig. 3 is a schematic perspective view of a propulsion system of an electric surfboard according to an embodiment of the present invention;

fig. 4 is a schematic perspective view of a propulsion system of an electric surfboard according to an embodiment of the present invention at another viewing angle;

fig. 5 is a front view of an assembly structure of an impeller and a transmission shaft according to an embodiment of the present invention;

fig. 6 is a perspective view illustrating an assembly structure of the impeller and the transmission shaft according to the embodiment of the present invention;

fig. 7 is an exploded view of an assembly structure of an impeller and a transmission shaft according to an embodiment of the present invention;

fig. 8 is a schematic front view of an impeller according to an embodiment of the present invention;

fig. 9 is a rear view schematic structural diagram of an impeller according to an embodiment of the present invention;

fig. 10 is a schematic side view of an impeller according to an embodiment of the present invention;

fig. 11 is a schematic perspective view of an impeller according to an embodiment of the present invention;

fig. 12 is another schematic structural diagram of an impeller according to an embodiment of the present invention;

fig. 13 is a schematic perspective view of an impeller according to an embodiment of the present invention at another viewing angle;

fig. 14 is a schematic perspective view of the fastener according to the embodiment of the present invention;

fig. 15 is a schematic perspective view of a transmission shaft according to an embodiment of the present invention;

fig. 16 is a schematic perspective view of a transmission shaft according to an embodiment of the present invention at another viewing angle;

fig. 17 is a schematic perspective view of a transmission shaft according to an embodiment of the present invention at a further viewing angle;

fig. 18 is another schematic structural view of an impeller according to an embodiment of the present invention;

fig. 19 is another schematic perspective view of a transmission shaft according to an embodiment of the present invention;

fig. 20 is a schematic cross-sectional view of a second pod according to an embodiment of the present invention;

fig. 21 is a schematic structural view of the impeller in embodiment 2 of the present invention;

fig. 22 is a schematic side view of the impeller according to the embodiment of the present invention after being connected to the transmission shaft heat jacket;

description of reference numerals:

1-impeller, 11-blade, 12-hub, 121-rim, 122-connecting sleeve, 123-snap groove, 124-rib, 125-exhaust groove, 2-drive shaft, 21-first limit step, 22-second limit step, 23-receiving groove, 24-snap portion, 25-plug portion, 3-motor, 4-snap key, 5-housing component, 51-mounting groove, 6-dome, 61-first dome, 62-second dome, 6201-stationary impeller, 6202-fixing groove, 6202 a-mounting portion, 6202 b-dome, 6203-bearing, 6204-snap plate, 6205-bearing hole, 6206-receiving portion, 63-flange, 7-mounting plate, 71-first mounting plate, 72-second mounting plate, 73-reinforcing plate.

Detailed Description

In order to make the technical means, purpose and efficacy of the present invention easy to understand, the following embodiments of the present invention are described in detail with reference to the specific drawings.

It should be noted that all terms used in the present invention for directional and positional indication, such as: "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "inner", "outer", "top", "lower", "lateral", "longitudinal", "center", etc., are used only for explaining the relative positional relationship, connection conditions, etc., between the respective members in a certain specific state, and are only for convenience of description of the present invention, but do not require the present invention to be constructed and operated in a specific orientation, and therefore, should not be construed as limiting the present invention. In addition, the descriptions related to "first", "second", etc. in the present invention are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit ly indicating the number of technical features indicated.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

Example 1

As shown in fig. 1 to 20, the utility model discloses a propulsion system of electric surfboard, the propulsion system includes a motor 3, a wind deflector 6 and a mounting plate 7, the tail part of the lower side of a shell component 5 of the electric surfboard is provided with a mounting groove 51 with a cross section in a "U" shape, the propulsion system is located in the mounting groove 51, one end of the mounting groove 51 far away from the tail part of the electric surfboard is adjacent to a battery compartment of the electric surfboard, the motor 3 is electrically connected with a battery in the battery compartment, an output shaft of the motor 3 is connected with a transmission shaft 2, the transmission shaft 2 is connected with an impeller 1 through a fastening key 4, a concave holding groove 23 is arranged on the transmission shaft 2, a concave clamping groove 123 is arranged on the impeller 1, the fastening key 4 can extend into the holding groove 23 and the clamping groove 123 is fixed, the impeller 1 is located in the air guide sleeve 6, a hollow flow channel for water to flow through is arranged in the air guide sleeve 6, the air guide sleeve 6 is provided with a water inlet and a water outlet, the water inlet of the air guide sleeve 6 is formed in the mounting plate 7, the water outlet of the air guide sleeve 6 is located at the tail of the shell assembly 5, when the electric surfboard is used, water enters the flow channel from the water inlet of the air guide sleeve 6, the water is discharged out of the flow channel from the water outlet of the air guide sleeve 6 under the action of the impeller 1, and propelling force is provided for the electric surfboard, so that the electric surfboard can continuously advance.

In the use process of the electric surfboard, one side of the electric surfboard, which is in contact with water, is called as a 'lower side', the side opposite to the 'lower side' is called as an 'upper side', a surfer stands on the upper side of the electric surfboard, and the lower side of the electric surfboard is in contact with water and slides on the water surface.

Further, the card solid key 4 is rectangular form, the holding tank 23 is the elongated slot type, the card solid key 4 can stretch into the holding tank 23 and be spacing by the front and back both ends of holding tank 23. The clamping and fixing key 4 is fixed to the accommodating groove 23 and then limited by the front end and the rear end of the accommodating groove 23 in the length direction, the clamping and fixing key 4 extends out of the accommodating groove 23 in the height direction, the part, protruding out of the accommodating groove 23, of the clamping and fixing key 4 penetrates through the clamping and fixing key 4 and slides on the transmission shaft 2 until the sliding position of the impeller 1 is limited by the limiting part on the transmission shaft, the part, protruding out of the accommodating groove 23, of the clamping and fixing key 4 is accommodated in the accommodating groove 23, the part, protruding out of the accommodating groove 23, of the clamping and fixing key is accommodated in the clamping and fixing groove 123, and.

According to the motor, the battery bin is arranged in the shell assembly 5, the replaceable battery or the replaceable battery pack is arranged in the battery bin, and the replaceable battery or the replaceable battery pack is adopted to provide a power source for the motor 3, so that a diesel engine or a kerosene engine is avoided, and on one hand, the motor 3 cannot burn chemical dye, release toxic and harmful substances, pollute the environment or damage the body health of a user in the using process; on the other hand, the battery is adopted for power supply, so that the size and the mass of the shell component 5 can be reduced, and the electric surfboard is small in size, light in mass, easy to carry and convenient to use.

Furthermore, this application has formed downside open-ended propulsion system accommodation space through setting up mounting groove 51 at the downside afterbody of casing subassembly 5, the motor 3 is fixed in the mounting groove 51, and further with the water inlet of kuppe 6 forms integratively on mounting panel 7, during the use, water gets into from the water inlet on mounting panel 7 in the kuppe 6, then from the delivery port of kuppe 6 discharges, and the rivers direction is the opposite direction setting with the direction that sets up of motor 3 and battery compartment, motor 3 is the dive motor that can purchase on the market, on the one hand, can effectively avoid intaking in motor 3 and the battery compartment, and on the other hand, can also utilize rivers in the kuppe 6 to play the cooling effect to motor 3, avoid motor 3 overheat burns out, for example, through setting up the diversion pipe on kuppe 6, the water conduit guides the water flow in the air guide sleeve 6 to the motor to be sprayed out, and the motor is cooled.

In addition, this application propulsion system simple structure can realize swift assembly through card solid key 4 between transmission shaft 2 and the impeller 1, and production efficiency is high, the industrial production of being convenient for.

Further, the notch of the mounting groove 51 is located at the lower side of the housing assembly 5, one end of the mounting groove 51 close to the tail of the electric surfboard is open, no side wall is provided, and the water outlet of the air guide sleeve 6 can be discharged from the tail of the electric surfboard through the mounting groove 51 to provide a propelling force.

Further, the air guide sleeve 6 is of an arc-shaped bent structure.

Furthermore, the air guide sleeve 6 comprises a first air guide sleeve 61 and a second air guide sleeve 62, the first air guide sleeve 61 is connected with the mounting plate 7 and is provided with a water inlet of the air guide sleeve 6, the second air guide sleeve 62 is connected with the first air guide sleeve 61 through a flange 63, and the second air guide sleeve 62 is provided with a water outlet of the air guide sleeve 6.

Because the air guide sleeve 6 is a bent structure with a hollow inner part, the air guide sleeve 6 is arranged to be of a structure comprising the first air guide sleeve 61 and the second air guide sleeve 62, and the production difficulty of the air guide sleeve 6 can be greatly reduced. In addition, the first air guide sleeve 61 and the second air guide sleeve 62 are connected through the flange 63, so that the flange 63 can also play a role in reinforcing the first air guide sleeve 61 and the second air guide sleeve 62 while realizing a connecting function, and the strength of the first air guide sleeve 61 and the second air guide sleeve 62 is improved.

Further, the mounting plate 7 comprises a first mounting plate 71 positioned at the notch of the mounting groove 51 and a second mounting plate 72 positioned in the mounting groove 51, the first mounting plate 71 and the second mounting plate 72 are vertically connected, the first mounting plate 71 is used for covering and closing the notch of the mounting groove 51, and forms the water inlet of the air guide sleeve 6 together with the first air guide sleeve 61; the second mounting plate 72 is used to mount the motor 3.

Preferably, a triangular reinforcing plate 73 is disposed at the joint of the first mounting plate 71 and the second mounting plate 72, and the reinforcing plate 73 is used to improve the joint strength of the first mounting plate 71 and the second mounting plate 72.

Furthermore, one end of the transmission shaft 2 is connected with the motor 3, the other end of the transmission shaft 2 extends into the second air guide sleeve 62, a first limiting step 21 and a second limiting step 22 are formed on the transmission shaft 2 through the change of the cross sectional area, the first limiting step 21 is arranged on one side, close to the motor 3, of the transmission shaft 2, and the second limiting step 22 is arranged between the first limiting step 21 and the accommodating groove 23. In the example of the present invention, the first limit step 21 is used for limiting the bearing arranged at the joint when the transmission shaft 2 passes through the second mounting plate 72, and the second limit step 22 is used for limiting the impeller 1 in the sliding direction of the transmission shaft 2.

As an example of the utility model, transmission shaft 2 forms through the increase of cross-sectional area first spacing step 21 and the spacing step 22 of second, make transmission shaft 2 wholly is middle thin, the thick dumbbell shape in both ends, the cross-sectional area of the spacing step 22 department of first spacing step 21 and second is greater than between the spacing step 22 of first spacing step 21 and second the cross-sectional area of transmission shaft 2, this kind of structure does benefit to the weight that reduces transmission shaft 2 to guarantee the transmission effect of transmission shaft 2.

Further, the end part of the transmission shaft 2 connected with the motor 3 is provided with a clamping part 24, the clamping part 24 is a planar structure formed by cutting off a part of the material at the end part of the transmission shaft 2 along the axial direction, and correspondingly, the output shaft of the motor 3 is connected with the transmission shaft 2 into a whole through the clamping part 24 and can integrally rotate, so that the output shaft of the motor 3 can drive the transmission shaft 2 to rotate and further drive the impeller 1 to rotate.

As a preferred embodiment of the present invention, the impeller 1 includes a hub 12 and blades 11 located at the periphery of the hub 12, the blades 11 are spirally disposed at the periphery of the hub 12, and the central portion of the hub 12 is hollow.

The transmission shaft 2 can pass through the central part of the impeller 1 and then is connected with the impeller 1.

Specifically, wheel hub 12 includes wheel rim 121 and adapter sleeve 122, adapter sleeve 122 for with transmission shaft 2 corresponds the hollow annular structure in inside that sets up, wheel rim 121 is located adapter sleeve 122's periphery, wheel rim 121 is loudspeaker form, wheel rim 121's one end cross-sectional area is less, with adapter sleeve 122 fuses integratively, wheel rim 121's other end cross-sectional area is great, and the ring is established adapter sleeve 122's periphery, and through rib 124 with adapter sleeve 122 is connected. When the impeller 1 is mounted in the nacelle 6, the end of the rim 121 with the larger cross-sectional area is located close to the outlet of the nacelle 6. Due to the structural arrangement of the impeller, water flow can be stirred to a greater extent, so that the water flow flows to the water outlet of the air guide sleeve 6, and a larger propelling force is provided for the electric surfboard.

Further, as a preferred embodiment of the present invention, set up fixed impeller 6201 in second kuppe 62, fixed impeller 6201 with second kuppe 62's casing fixed connection fixed impeller 6201's center department sets up fixed slot 6202 set up bearing 6203 in the fixed slot 6202 set up bearing 6205 on the bearing 6203, transmission shaft 2 includes grafting portion 25, grafting portion 25 sets up and keeps away from in holding tank 23 one side of first spacing step 21, grafting portion 25 can pass bearing hole 6205 with fixed impeller 6201 relative rotational motion.

The utility model discloses an in the example, impeller 1 slidable mounting is at transmission shaft 2, and is connected through card solid key 4 between impeller 2 and the transmission shaft 2 and can integrative rotate, and one side quilt that impeller 2 is close to the motor the spacing step 22 of second carries on spacingly, and one side quilt that impeller 2 kept away from the motor fixed impeller 6201 carries on spacingly. The arrangement discloses a structure that the impeller 1 is limited in the axial direction of the transmission shaft, so that the number of parts is reduced, and the weight of a propulsion system of the electric surfboard is further reduced.

As a preferred embodiment of the present invention, the fixing groove 6202 includes an installation portion 6202a and a flow guiding portion 6202b, the bearing 6203 is detachably fixed to the installation portion 6202a, the flow guiding portion 6202b is disposed at the rear side of the installation portion 6202a, and the flow guiding portion 6202b is a truncated cone or a cone with a large front portion and a small rear portion. As an example of the present invention, both ends are spacing by card 6024 around the bearing 6203, cardboard 6024 joint is in the draw-in groove that sets up on installation portion 6202a, perhaps the front end of bearing 6203 is spacing by card 6024, the rear end of bearing 6203 is spacing by the spacing step of third that installation portion 6202a and water conservancy diversion portion 6202b junction formed.

When the water flow guide device is used, the insertion part 25 of the transmission shaft 2 penetrates through the bearing hole 6205 and then extends into the flow guide part 6202b, so that on one hand, the reliability of rotation of the transmission shaft 1 under the action of the motor belt is ensured, on the other hand, water flowing into the fixing groove 6202 flows out of the fixing groove 6202 under the action of the flow guide surface inclined by the flow guide part 6202b, and liquid accumulation is prevented from being formed in the fixing groove 6202.

Further, as a preferred embodiment of the present invention, a receiving portion 6206 is provided in the second air guide sleeve 62, and the receiving portion 6206 is provided at a side close to the first air guide sleeve 61. This setting makes impeller 1 after the propulsion system installation of electronic surfboard set up in second kuppe 62, and the fixed impeller 6201 contact of impeller 1 in 2 upper blade wheels of transmission shaft and the second kuppe 62, has increased the stability of intaking in the kuppe 6 and going out water, for electronic surfboard provides bigger, more stable propulsive force, improves the stability of the propulsion system work of electronic surfboard.

Further, the inner side edge of the connecting sleeve 122 is provided with a clamping groove 123, and the clamping groove 123 penetrates through to the two ends of the connecting sleeve 122 along the axial direction of the connecting sleeve 122.

Preferably, the accommodating groove 23 extends along the axial direction of the transmission shaft 2, correspondingly, the clamping groove 123 extends along the axial direction of the connecting sleeve 122, the clamping key 4 is partially filled in the accommodating groove 23, the remaining part is filled in the clamping groove 123, and the clamping key 4 can just fill the space in the accommodating groove 23 and the clamping groove 123.

This setting makes when assembling the impeller, can at first block admittedly key 4 card into holding tank 23, then with joint groove 123 on the impeller 1 with block admittedly key 4 corresponds, slide impeller 1, block admittedly key 4 can block simultaneously into holding tank 23 and joint groove 123, realize that impeller 1 carries on spacingly in the circumferential direction of transmission shaft 2, and it is spacing with the first spacing step 21 contact on impeller 1's front end and the transmission shaft 2, pass bearing hole 6205 on the second kuppe 62 again the grafting portion 25 of transmission shaft 2, with the tip and the impeller 1 butt of fixed impeller 6201, realize that impeller 1 carries on spacingly in the axial direction of transmission shaft 2.

This set up simple structure, reduced the setting of accessories, reduced the propulsion system's of electronic surfboard weight, the assembly is swift, connects stably, has reduced manufacturing cost to need not change the pump shaft when examining the change impeller, also need not open the engine compartment, make maintenance work become easier.

Example 2

As shown in fig. 1 to 5 and 21 to 22, this embodiment discloses another propulsion system for an electric surfboard, which includes a motor 3, a fairwater hood 6 and a mounting plate 7, wherein a mounting groove 51 with a U-shaped cross section is formed at the tail of the lower side of a housing assembly 5 of the electric surfboard, the propulsion system is located in the mounting groove 51, one end of the mounting groove 51 far away from the tail of the electric surfboard is adjacent to a battery compartment of the electric surfboard, an input end of the motor 3 is electrically connected to a battery in the battery compartment, an output shaft of the motor 3 is connected to a transmission shaft 2, the transmission shaft 2 is connected to an impeller 1 in a shrink fit manner, the impeller 1 is located in the fairwater hood 6, the fairwater hood 6 is hollow and provided with a flow channel for water to flow through, the fairwater hood 6 has a water inlet and a water outlet, and a water inlet of the fairwater hood 6 is formed, the water outlet of the air guide sleeve 6 is positioned at the tail part of the shell component 5, when the electric surfboard is used, water enters the flow channel from the water inlet of the air guide sleeve 6, and is discharged out of the flow channel from the water outlet of the air guide sleeve 6 under the action of the impeller 1, so that the propelling force is provided for the electric surfboard, and the electric surfboard can continuously advance.

Except that the accommodating groove 23 is not formed in the transmission shaft 2, the rest of the structure is the same as that of embodiment 1, and details are not repeated.

The structure of the impeller 1 is the same as that of embodiment 1 except that the clamping groove 123 is not provided, and the description is omitted.

During assembly, firstly, the impeller 1 is heated, so that the impeller 1 is heated and expanded, then the impeller 1 is installed on the transmission shaft 2, after cooling, the volume of the impeller 1 is shrunk and fixed on the transmission shaft 2, and the assembly of the impeller 1 and the transmission shaft 2 is realized.

In this embodiment, the impeller 1 is made of engineering plastics, so that on one hand, the bonding strength of the impeller 1 and the transmission shaft 2 after hot sleeving connection is ensured, and the impeller is prevented from being separated from the transmission shaft, and on the other hand, the corrosion resistance of the impeller made of the engineering plastics is improved compared with that of metal.

As an example of the present invention, an exhaust groove 125 is provided at an inner edge of the connection sleeve 122. This setting up when making impeller 1 and 2 hot sleeves of transmission shaft be connected, can effectual exhaust gas, prevent the passageway that does not bond, improved impeller 1 and transmission shaft 2's installation power, reduce impeller 1's loss.

Preferably, the exhaust groove 125 penetrates to both ends of the connection sleeve 122 along the axial direction of the connection sleeve 122. As an example of the utility model, the cross-section of air discharge duct 125 is the arc setting, the arc radius of the air discharge duct 125 of the same cross-section slightly is greater than the radius of the inboard cross-section of adapter sleeve 122, for example 2mm ~5mm big, after adopting above-mentioned structure, air discharge duct 125 just does not have the dead angle, the gas that produces when impeller 1 overlaps with transmission shaft 2 heat can be quick discharge from air discharge duct 4, and air discharge duct 4 itself is shallow, can not cause gas passage, just so avoided the air to remain at the in-process of installation, the better inboard passageway of adapter sleeve 122 of having sealed, further guarantee the reliability of bonding behind impeller 1 and the transmission shaft 2 heat overlaps.

Preferably, the exhaust grooves 125 are uniformly distributed inside the connecting sleeve 122.

Compared with the embodiment 1, the propulsion system of the embodiment has the advantages of simpler structure, quicker assembly and more contribution to industrial production and application.

Example 3

An electric surfboard is provided with the propulsion system.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. The utility model provides a propulsion system of electric surfboard, electric surfboard's casing subassembly (5) downside afterbody is equipped with mounting groove (51), propulsion system is located in mounting groove (51), its characterized in that, the transversal personally submitting "U" type setting of mounting groove (51), propulsion system includes motor (3), kuppe (6) and mounting panel (7), motor (3) are connected with the battery electricity in the battery compartment, the output shaft of motor (3) is connected with the one end of transmission shaft (2), transmission shaft (2) and impeller (1) thermal envelope are connected, impeller (1) set up in kuppe (6), kuppe (6) inside cavity, be equipped with the runner that the water that supplies to flow through, kuppe (6) have water inlet and delivery port, the water inlet of kuppe (6) forms on mounting panel (7), and the water outlet of the air guide sleeve (6) is positioned at the tail part of the shell component (5).

2. The propulsion system of electric surfboards according to claim 1, wherein the fairings (6) comprise a first fairings (61) and a second fairings (62), one end of the first fairings (61) is connected with the mounting plate (7), the other end of the first fairings (61) is connected with the second fairings (62) through a flange (63), and the outlet of the fairings (6) is arranged on the second fairings (62).

3. The propulsion system of electric surfboards as claimed in claim 1, wherein the mounting plate (7) comprises a first mounting plate (71) and a second mounting plate (72), the first mounting plate (71) and the second mounting plate (72) being vertically connected, the first mounting plate (71) being overlaid on the mounting groove (51), the motor (3) being mounted on the second mounting plate (72).

4. A propulsion system for electric surfboards as claimed in claim 3 wherein a stiffening plate (73) is provided at the junction of the first mounting plate (71) and the second mounting plate (72).

5. The propulsion system for electric surfboards as claimed in claim 4 wherein the impeller is made of engineering plastic.

6. The propulsion system for electric surfboards according to claim 2, wherein a fixed impeller (6201) is provided in the second pod (62), the fixed impeller (6201) is fixedly connected to the housing of the second pod (62), a fixing groove (6202) is provided at the center of the fixed impeller (6201), a bearing (6203) is provided in the fixing groove (6202), a bearing hole (6205) is provided in the bearing (6203), the transmission shaft (2) comprises a plug-in part (25), and the plug-in part (25) passes through the bearing hole (6205) and is rotatably connected to the second pod (62).

7. The propulsion system of electric surfboard according to claim 6, wherein the fixing groove (6202) comprises an installation portion (6202 a) and a guide portion (6202 b), the bearing (6203) is detachably fixed to the installation portion (6202 a), the guide portion (6202 b) is provided at a rear side of the installation portion (6202 a), the guide portion (6202 b) is in a shape of a tapered table or a cone, and a cross-sectional area of a front end of the guide portion (6202 b) is greater than a cross-sectional area of a rear end.

8. The propulsion system for electric surfboards according to claim 2, characterised in that a housing (6206) is provided in the second pod (62), the housing (6206) being provided on a side close to the first pod (61), the impeller (1) on the drive shaft (2) being provided in the housing (6206).

9. The propulsion system of electric surfboards according to claim 2, wherein a battery compartment is provided in the housing assembly (5), and a replaceable battery or a replaceable battery pack is provided in the battery compartment, the mounting groove (51) is provided at the lower side of the rear end of the housing assembly (5), the motor (3) is fixed in the mounting groove (51), and a water guide pipe is provided on the fairwater guide (6) and guides the water flow in the fairwater guide (6) to the motor (3) for spraying.

10. An electric surfboard comprising a propulsion system as claimed in any one of claims 1 to 9.

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