A jet pump structure for a surfboard

Abstract

A jet pump structure for a surfboard, which relates to the technical field of surfboards. It includes: a fixed cover fixedly assembled with the surfboard, and a water inlet is arranged on the fixed cover; a propeller assembly arranged on one side of the fixed cover close to the tail of the surfboard and used to discharge the water entering through the water inlet from the fixed cover by its own rotation to form a reverse thrust on the surfboard; and a power source arranged in the fixed cover and on the side of the fixed cover far from the tail of the surfboard; the power source includes: a stator fixedly assembled in the fixed cover; an outer rotor arranged in the fixed cover, one end of the outer rotor close to the stator is rotationally and sealingly assembled with the stator, and the other end of the outer rotor is fixedly assembled with the propeller assembly. After the power source is powered on, the outer rotor rotates relative to the stator to drive the propeller assembly to rotate; and a bearing arranged between the outer rotor and the stator. The jet pump structure adopting the above technical scheme has the advantages of small installation space, long service life, and good waterproof effect of the motor.

Description

Technical Field

[0001] The present invention relates to the technical field of surfboards, and particularly to a jet pump structure for a surfboard. Background Art

[0002] Surfing is very popular among people because of its excitement and effectiveness in exercising the body. Ordinary surfboards can only be used by relying on the thrust of the wind and waves. When there is no wind or the wind and waves are small, the surfboard loses its due function. In order to surf to the fullest even when there is no wind or the wind and waves are small, there is already a power surfboard in the prior art.

[0003] Existing power surfboards generally include a hull, a jet pump structure, etc. The jet pump structure generally uses an electric motor to drive a propeller to rotate, thereby driving the water flow to move backward, so that the surfboard provides the power for surfing on the water by means of the reaction force of the water. The jet pump structure, as the core power component, is generally installed at the bottom of the stern, and the jet pump and the propeller usually adopt a split assembly. Although the split assembly can facilitate the maintenance of the jet pump structure and the replacement of parts, the installation space required is relatively large, and the installation process is relatively complicated. At the same time, because the surfboard is soaked in seawater for a long time and the salt content in the seawater is relatively high, and the electric motor generates heat during operation, it is easy to cause the salt in the seawater to crystallize on the rotating shaft of the electric motor, resulting in jamming between the motor rotating shaft and the motor body, and causing the motor to be damaged. Therefore, improvement is needed. Summary of the Invention

[0004] The purpose of the present invention is to provide a jet pump structure for a surfboard aiming at the defects and deficiencies of the prior art. Through the sealed assembly between the stator and the outer rotor of the power source, and filling the oil seal medium in the cavity formed by the stator and the bearing, it can effectively prevent water from entering between the stator and the rotor and forming crystals, resulting in the jamming of the power source, thereby extending the service life of the jet pump. At the same time, by fixing the spiral assembly and the power source together with a fixing cover, the installation space of the jet pump can be greatly reduced, ensuring the compactness of the overall structure of the surfboard. It has the advantages of small installation space, long service life, and good waterproof effect of the motor.

[0005] To achieve the above object, the technical solution adopted by the present invention is: a jet pump structure for a surfboard, comprising: a fixed cover fixedly assembled with the surfboard, and a water inlet is provided on the fixed cover; a propeller assembly disposed inside the fixed cover near the tail side of the surfboard, which discharges the water entering through the water inlet from the inside of the fixed cover by its own rotation to form a reverse thrust on the surfboard; and a power source disposed inside the fixed cover and located on the side of the fixed cover away from the tail of the surfboard for driving the propeller assembly to rotate; the power source includes: a stator fixedly assembled inside the fixed cover; an outer rotor disposed inside the fixed cover, one end of the outer rotor near the stator is rotationally and hermetically assembled with the stator to prevent water from entering the assembly space between the stator and the outer rotor, and the other end of the outer rotor is fixedly assembled with the propeller assembly. After the power source is energized, the outer rotor rotates relative to the stator to drive the propeller assembly to rotate; and a bearing disposed between the outer rotor and the stator.

[0006] Further, the stator includes: a seat body fixedly assembled with the fixed cover; a bracket fixedly installed on the seat body for assembling the outer rotor; a winding coil slidably assembled on the bracket; and an end cover fixedly installed on the seat body for decoration, and a rubber pad is provided between the end cover and the seat body.

[0007] Further, a slide rail is provided on the bracket near the winding coil side, and a slide groove for assembling with the slide rail is provided on the winding coil.

[0008] Further, the outer rotor includes: a rotating shaft, one end of the rotating shaft passes through the bracket and can rotate relative to the bracket, and the other end of the rotating shaft is fixedly assembled with the propeller assembly; an outer rotor housing covering the winding coil and fixedly assembled with the rotating shaft, and a part of the outer rotor housing is inserted into the winding coil and abuts against the inner ring of the bearing; a magnetic member inserted into the outer rotor housing and located between the outer rotor housing and the winding coil; and a fixing disk sleeved on the rotating shaft and fixedly assembled with the rotating shaft, and the fixing disk is used for fixedly assembling with the outer rotor housing to realize the fixed assembly between the outer rotor housing and the rotating shaft.

[0009] Further, the inner ring of the bearing is hermetically and fixedly assembled with the rotating shaft, the outer ring of the bearing is hermetically and fixedly assembled with the inner wall of the bracket, and the cavity between the bearing and the inner wall of the bracket is filled with an oil seal medium.

[0010] Further, gear teeth are provided on one side of the rotating shaft away from the outer rotor. The propeller assembly includes: a propeller that is snap-fitted with the gear teeth, and the propeller can rotate synchronously with the rotating shaft to discharge the water entering from the water inlet out of the fixed cover; a duct that is arranged on the fixed cover close to the propeller side and is detachably assembled with the fixed cover, and is used to form a jet of the water pushed by the propeller and discharge it out of the fixed cover; and a rectifying member that is arranged between the duct and the propeller, and the rectifying member is tightly fixed in the fixed cover through the duct and is used to rectify the water flow formed by the propeller pushing the water to ensure that the water flow is quickly discharged out of the fixed cover.

[0011] Further, a stepped portion is provided on the inner side wall of the fixed cover, one end of the rectifying member abuts against the stepped portion, and the other end abuts against the duct.

[0012] Further, an internal thread is provided on the inner side wall of the fixed cover, an external thread is provided on the duct close to the fixed cover side, and the duct is fixedly assembled on the fixed cover through the thread.

[0013] Further, an installation cover is provided on the fixed cover close to the power source side, the installation cover is threadedly assembled with the fixed cover, and the installation cover is used to install a control board, and the control board is used to control the coordinated work of each component of the surfboard.

[0014] After adopting the above technical solution, the beneficial effects of the present invention are as follows: When the jet pump structure is used, the power source is powered on, the fixed cover and the stator part of the power source remain stationary relative to the surfboard, and the outer rotor rotates relative to the stator and the fixed cover when powered on, thereby driving the propeller fixedly assembled with the rotating shaft to rotate. Since the stator and the outer rotor are connected by a bearing, and the outer rotor is fixed to the inner ring of the bearing, and the stator is fixed to the outer ring of the bearing, it is ensured that the water flow cannot enter between the stator and the outer rotor while the rotating shaft rotates at a high speed, thereby effectively preventing water from entering between the stator and the rotor and forming crystallization, resulting in the situation of the power source being stuck, and further extending the service life of the jet pump; at the same time, the spiral assembly and the power source are integrated by the fixed cover, thereby effectively reducing the space of the surfboard occupied by the jet pump structure when installed on the board body of the surfboard, and ensuring the compactness of the surfboard structure; and the propeller, driven by the rotating shaft, pushes the water entering from the water inlet, and successively discharges it out of the fixed cover through the fixed cover, the rectifying member and the duct, and the discharged water flow forms a reaction force in the water to drive the surfboard to move forward. The jet pump structure arranged in this way has the advantages of small installation space, long service life, and good waterproof effect of the motor. Description of the Drawings

[0015] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0016] Figure 1 is the overall structural schematic diagram of this embodiment;

[0017] Figure 2 is the top view of this embodiment with the mounting cover, rectifying member, and duct removed;

[0018] Figure 3 corresponds to Figure 2 the cross-sectional view after sectioning along the cutting line A-A in

[0019] Figure 4 is the structural schematic diagram of the power source and the propeller in this embodiment;

[0020] Figure 5 is the exploded view of the stator in this embodiment;

[0021] Figure 6 is the structural schematic diagram of the outer rotor and the bearing in this embodiment;

[0022] Figure 7 is the exploded view of the propeller assembly in this embodiment;

[0023] Figure 8 is the structural schematic diagram of the fixed cover in this embodiment.

[0024] Explanation of reference numerals: 100, fixed cover; 101, water inlet; 110, step portion; 200, propeller assembly; 210, propeller; 220, duct; 230, rectifying member; 300, power source; 301, chute; 310, stator; 311, seat body; 312, bracket; 313, winding coil; 314, end cover; 315, rubber pad; 316, slide rail; 320, outer rotor; 321, rotating shaft; 322, outer rotor housing; 323, magnetic member; 324, fixing plate; 325, gear teeth; 330, bearing; 400, mounting cover. Detailed implementation manners

[0025] The following further elaborates on the present invention in conjunction with the drawings.

[0026] This specific embodiment is only an interpretation of the present invention and is not a limitation thereof. After reading this specification, those skilled in the art can make modifications to this embodiment without creative contributions as needed, but as long as they are within the scope of the claims of the present invention, they are protected by the patent law.

[0027] This embodiment relates to a jet pump structure for a surfboard, as Figure 1-8 shown, including: a fixed cover 100, a propeller assembly 200, and a power source 300. Among them, the fixed cover 100 is fixedly assembled with the surfboard, and a water inlet 101 is provided on the fixed cover 100. During the operation of the surfboard, water enters the fixed cover 100 from the water inlet 101, is discharged from the fixed cover 100 via the propeller assembly 200 and forms a reverse thrust to drive the surfboard to move. The propeller assembly 200 is arranged inside the fixed cover 100 on the side close to the tail of the surfboard. The propeller assembly 200 is used to discharge the water entering from the water inlet 101 out of the fixed cover 100 by its own rotation, so as to form a reverse thrust on the surfboard. The power source 300 is arranged inside the fixed cover 100 and is located on the side far from the tail of the surfboard inside the fixed cover 100. The power source 300 is used to drive the spiral coil assembly to rotate.

[0028] Specifically, as Figure 1-6 shown, the power source 300 includes: a stator 310, an outer rotor 320, and a bearing 330. Among them, the stator 310 is fixedly assembled inside the fixed cover 100. The outer rotor 320 is arranged inside the fixed cover 100. One end of the outer rotor 320 close to the stator 310 is rotationally and sealingly assembled with the stator 310 to prevent water from entering the assembly space between the stator 310 and the outer rotor 320. The other end of the outer rotor 320 is fixedly assembled with the propeller assembly 200. After the power source 300 is powered on, the outer rotor 320 rotates relative to the stator 310 to drive the propeller assembly 200 to rotate. The bearing 330 is arranged between the outer rotor 320 and the stator 310. The bearing 330 is used to reduce the friction between the outer rotor 320 and the stator 310 and facilitate the sealing assembly between the outer rotor 320 and the stator 310.

[0029] Furthermore, as Figure 5 shown, the stator 310 includes: a seat body 311, a bracket 312, a winding coil 313, and an end cover 314. The seat body 311 is fixedly assembled with the fixed cover 100 through a plurality of fastening screws. The bracket 312 is fixedly installed on the seat body 311 and is used for assembling the outer rotor 320. The winding coil 313 is slidably assembled on the bracket 312. The end cover 314 is fixedly installed on the seat body 311 and serves a decorative function, and a rubber pad 315 is arranged between the end cover 314 and the seat body 311.

[0030] In this embodiment, four slide rails 316 are arranged on the side of the bracket 312 close to the winding coil 313, and four sliding grooves 301 for assembling with the four slide rails 316 are arranged on the winding coil 313. In other embodiments, the number of the slide rails 316 and the sliding grooves 301 can also be three, five or other numbers.

[0031] Furthermore, asFigure 6 As shown, the outer rotor 320 includes: a rotating shaft 321, an outer rotor housing 322, a magnetic member 323, and a fixing disk 324.

[0032] Specifically, one end of the rotating shaft 321 passes through the bracket 312 and can rotate relative to the bracket 312, and the other end of the rotating shaft 321 is fixedly assembled with the propeller assembly 200. The outer rotor housing 322 covers the winding coil 313 and is fixedly assembled with the rotating shaft 321, and a part of the outer rotor housing 322 is inserted into the winding coil 313 and abuts against the inner ring of the bearing 330. The magnetic member 323 is inserted into the outer rotor housing 322 and is located between the outer rotor housing 322 and the winding coil 313. The fixing disk 324 is sleeved on the rotating shaft 321 and is fixedly assembled with the rotating shaft 321. The fixing disk 324 is used for fixedly assembling with the outer rotor housing 322 to realize the fixed assembly between the outer rotor housing 322 and the rotating shaft 321.

[0033] Preferably, the inner ring of the bearing 330 is fixedly assembled with the rotating shaft 321 in a sealed manner, the outer ring of the bearing 330 is fixedly assembled with the inner wall of the bracket 312 in a sealed manner, and the cavity between the bearing 330 and the inner wall of the bracket 312 is filled with an oil seal medium. The fixing disk 324 is fixedly installed on the rotating shaft 321 by radially arranged fastening screws. The magnetic member 323 is a permanent magnet, and the rotating shaft 321 passes through the bracket 312 and extends toward one side of the propeller assembly 200.

[0034] Furthermore, as Figure 1-8 shown, a gear 325 is provided on the rotating shaft 321 on the side away from the outer rotor 320. The propeller assembly 200 includes: a propeller 210, a duct 220, and a fairing 230.

[0035] Among them, the propeller 210 is snap-fitted with the gear 325, and the propeller 210 can rotate synchronously with the rotating shaft 321 to discharge the water entering from the water inlet 101 out of the fixed cover 100. The duct 220 is arranged on the fixed cover 100 on the side close to the propeller 210 and is detachably assembled with the fixed cover 100. The duct 220 is used for forming a jet of the water pushed by the propeller 210 and discharging it out of the fixed cover 100. The fairing 230 is arranged between the duct 220 and the propeller 210. The fairing 230 is tightly fixed in the fixed cover 100 through the duct 220 and is used for rectifying the water flow formed by the water pushed by the propeller 210 to ensure that the water flow is quickly discharged out of the fixed cover 100 by the fairing 230.

[0036] Preferably, as Figure 1-8As shown, internal threads are provided on the inner side wall of the fixed cover 100, and external threads are provided on the side of the duct 220 close to the fixed cover 100. The duct 220 is fixedly assembled on the fixed cover 100 through the threads. A stepped portion 110 is provided on the inner side wall of the fixed cover 100. When the duct 220 and the fixed cover 100 are assembled, the duct 220 slowly moves towards the side of the fairing 230, driving the fairing 230 to displace towards the side of the propeller 210 until the fairing 230 completely abuts against the stepped portion 110. During the displacement process of the fairing 230, the duct 220 causes one end of the fairing 230 to gradually abut against the stepped portion 110.

[0037] Furthermore, as Figure 1-8 shown, an installation cover 400 is provided on the side of the fixed cover 100 close to the power source 300. The installation cover 400 is threadedly assembled with the fixed cover 100, and the installation cover 400 is used to install a control board, and the control board is used to control the coordinated work of the various components of the surfboard.

[0038] The working principle of this embodiment is generally as follows: When the jet pump structure is in use, the power source 300 is energized. The fixed cover 100 and the stator 310 part of the power source 300 remain stationary relative to the surfboard. The outer rotor 320 rotates relative to the stator 310 and the fixed cover 100 when energized, thereby driving the propeller 210 fixedly assembled with the rotating shaft 321 to rotate. Since the stator 310 and the outer rotor 320 are connected by a bearing 330, and the outer rotor 320 is fixed to the inner ring of the bearing 330, and the stator 310 is fixed to the outer ring of the bearing 330, it is ensured that the water flow cannot enter between the stator 310 and the outer rotor 320 while the rotating shaft 321 rotates at a high speed, thereby effectively preventing water from entering between the stator 310 and the rotor and forming crystallization, resulting in the jamming of the power source 300, and thus extending the service life of the jet pump; at the same time, the spiral assembly and the power source 300 are integrated through the fixed cover 100, thereby effectively reducing the space of the surfboard occupied by the jet pump structure when installed on the board body of the surfboard, ensuring the compactness of the surfboard structure; and the propeller 210 drives the water entering from the dynamic water inlet 101 under the drive of the rotating shaft 321, and discharges the water from the fixed cover 100 through the fixed cover 100, the fairing 230 and the duct 220 in sequence. The discharged water flow forms a reaction force in the water, driving the surfboard to move forward. The jet pump structure arranged in this way has the advantages of small installation space, long service life, and good waterproof effect of the motor.

[0039] It is only used to illustrate the technical solutions of the present invention and not to limit them. Any other modifications or equivalent replacements made by those of ordinary skill in the art to the technical solutions of the present invention should be covered within the scope of the claims of the present invention as long as they do not depart from the spirit and scope of the technical solutions of the present invention.

Claims

1. A jet pump structure for a surfboard, characterized in that, Comprising: A fixed cover (100) fixedly assembled with a surfboard, an inlet (101) being provided on the fixed cover (100); A propeller assembly (200) disposed inside the fixed cover (100) near the tail side of the surfboard, for discharging the water entering through the inlet (101) from the fixed cover (100) by its own rotation to form a reverse thrust on the surfboard; And, A power source (300) disposed inside the fixed cover (100) and located on the side of the fixed cover (100) away from the tail of the surfboard, for driving the propeller assembly (200) to rotate; The power source (300) includes: A stator (310) fixedly assembled inside the fixed cover (100); An outer rotor (320) disposed inside the fixed cover (100), one end of the outer rotor (320) near the stator (310) is rotationally and sealingly assembled with the stator (310) to prevent water from entering the assembly space between the stator (310) and the outer rotor (320), the other end of the outer rotor (320) is fixedly assembled with the propeller assembly (200), and after the power source (300) is powered on, the outer rotor (320) rotates relative to the stator (310) to drive the propeller assembly (200) to rotate; And, A bearing (330) disposed between the outer rotor (320) and the stator (310); The stator (310) includes: A seat body (311) fixedly assembled with the fixed cover (100); A bracket (312) fixedly installed on the seat body (311) for assembling the outer rotor (320); A winding coil (313) slidably assembled on the bracket (312); And, An end cover (314) fixedly installed on the seat body (311) for decoration, a rubber pad (315) being provided between the end cover (314) and the seat body (311); A slide rail (316) is provided on the bracket (312) near the winding coil (313), and a slide groove (301) for assembling with the slide rail (316) is provided on the winding coil (313); The outer rotor (320) includes: A rotating shaft (321), one end of the rotating shaft (321) passes through the bracket (312) and can rotate relative to the bracket (312), and the other end of the rotating shaft (321) is fixedly assembled with the propeller assembly (200); An outer rotor housing (322), the outer rotor housing (322) covers the winding coil (313) and is fixedly assembled with the rotating shaft (321), and a part of the outer rotor housing (322) is inserted into the winding coil (313) and abuts against the inner ring of the bearing (330); A magnetic member (323), the magnetic member (323) is inserted on the outer rotor housing (322) and is located between the outer rotor housing (322) and the winding coil (313); And, A fixed disk (324) is sleeved on the rotating shaft (321) and fixedly assembled with the rotating shaft (321). The fixed disk (324) is used for fixedly assembling with the outer rotor housing (322) to realize the fixed assembly between the outer rotor housing (322) and the rotating shaft (321). The inner ring of the bearing (330) is fixedly assembled with the rotating shaft (321) in a sealed manner, and the outer ring of the bearing (330) is fixedly assembled with the inner wall of the bracket (312) in a sealed manner. And an oil seal medium is filled in the cavity between the bearing (330) and the inner wall of the bracket (312). A gear (325) is arranged on one side of the rotating shaft (321) away from the outer rotor (320). The propeller assembly (200) includes: a propeller (210) clamped and assembled with the gear (325). The propeller (210) can rotate synchronously with the rotating shaft (321) to discharge the water entering from the water inlet (101) out of the fixed cover (100). A duct (220) is arranged on one side of the fixed cover (100) close to the propeller (210) and detachably assembled with the fixed cover (100), and is used for jetting the water flow pushed by the propeller (210) out of the fixed cover (100). And, A rectifying member (230) is arranged between the duct (220) and the propeller (210). The rectifying member (230) is tightly fixed in the fixed cover (100) through the duct (220), and is used for rectifying the water flow formed by the water pushed by the propeller (210) to ensure the rapid discharge of the water flow out of the fixed cover (100). A step portion (110) is arranged on the inner side wall of the fixed cover (100). One end of the rectifying member (230) abuts against the step portion (110), and the other end abuts against the duct (220).

2. The jet pump structure for a surfboard according to claim 1, characterized in that, Internal threads are arranged on the inner side wall of the fixed cover (100), and external threads are arranged on one side of the duct (220) close to the fixed cover (100). The duct (220) is fixedly assembled on the fixed cover (100) through threads.

3. The jet pump structure for a surfboard according to any one of claims 1-2, characterized in that, An installation cover (400) is arranged on one side of the fixed cover (100) close to the power source (300). The installation cover (400) is threadedly assembled with the fixed cover (100), and the installation cover (400) is used for installing a control board, and the control board is used for controlling the coordinated work among the components of the surfboard.

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