An underwater hub motor

Abstract

The utility model discloses an underwater hub motor, underwater hub motor includes fixed axle, rotor, stator and sealing washer, rotor includes casing and a plurality of magnet, each magnet is distributed on the inner wall of casing along circumference around stator, and one end of casing is equipped with for drive end, and drive end is equipped with the connecting structure for with outside connection, the middle part of fixed axle is located in casing, and both ends of fixed axle respectively wear out both ends of casing, and both ends of fixed axle respectively with casing rotation assembly, sealing washer sets up in the rotation assembly gap between the end of fixed axle and casing, is used for sealing the gap between fixed axle and casing, stator sets up in casing and is set up on fixed axle. Casing and fixed axle rotation assembly, set up sealing washer between fixed axle and casing, like this, seal the gap between casing and fixed axle, thereby improve waterproof dustproof performance, make underwater hub motor can work normally under water.

Description

Technical Field

[0001] This utility model relates to the field of motor structure technology, and more particularly to an underwater hub motor. Background Technology

[0002] As a drive structure, electric motors offer advantages such as light weight, simple layout, and ease of operation. Underwater motors are commonly used in water pump and propeller drives. Their structure includes a housing, an outer stator, an inner rotor, and a shaft. The outer stator is housed within the housing, the inner rotor within the outer stator, and the shaft connects to the inner rotor, passing through the housing to output rotational motion. To cope with underwater working environments, the housing typically has excellent sealing properties, and the shaft and housing also have a sealed structure. Hub motors are commonly used to drive wheels, frequently wading through water in rainy weather and on flooded roads. However, existing hub motors still cannot meet waterproofing requirements and cannot operate entirely underwater. Utility Model Content

[0003] In order to solve the technical problem that existing hub motors cannot operate completely underwater, one of the objectives of this utility model is to provide an underwater hub motor.

[0004] One of the objectives of this utility model is achieved through the following technical solution:

[0005] An underwater hub motor, the underwater hub motor comprising a fixed shaft, a rotor, a stator and a sealing ring;

[0006] The rotor includes a housing and a plurality of magnets, each of the magnets being distributed circumferentially around the stator on the inner wall of the housing. One end of the housing is provided as a driving end, and the driving end is provided with a connection structure for connecting to the outside.

[0007] The middle part of the fixed shaft is located inside the housing, and the two ends of the fixed shaft extend out of the two ends of the housing, and the two ends of the fixed shaft are rotatably assembled with the housing.

[0008] The sealing ring is disposed in the rotational assembly gap between the end of the fixed shaft and the housing, and is used to seal the gap between the fixed shaft and the housing;

[0009] The stator is disposed inside the housing and sleeved on the fixed shaft.

[0010] In some further embodiments, the housing includes a sleeve and a first end cap and a second end cap respectively disposed at both ends of the sleeve, wherein the first end cap is the driving end;

[0011] Several of the magnets are disposed on the inner wall of the sleeve.

[0012] In some further embodiments, the first end cap is provided with a plurality of threaded holes or transmission protrusions for connection to the outside.

[0013] In some further embodiments, the inner side of the first end cap is provided with a plurality of first grooves for assembling magnets, and the plurality of first grooves are evenly distributed along the circumference.

[0014] The first end of the magnet extends into the first groove.

[0015] In some further embodiments, the rotor further includes a retaining magnetic ring, which is retained inside the sleeve and located at one end near the second end cap. The retaining magnetic ring has a plurality of second grooves on the side near the magnet, and the plurality of second grooves are evenly distributed along the circumference.

[0016] The second end of the magnet extends into the second groove.

[0017] In some further embodiments, the first end cap is welded to or sealed to the sleeve.

[0018] In some further embodiments, the second end cap is provided with a threaded connecting ring, and the end of the threaded connecting ring away from the magnet is provided with an annular groove, which is filled with sealant.

[0019] The threaded connecting ring is embedded in the sleeve and engages with the sleeve's threads.

[0020] In some further embodiments, one end of the fixed shaft is provided with an axially extending inlet channel, and the two ends of the inlet channel are respectively provided with a first opening and a second opening, the first opening being located outside the housing and the second opening being located inside the housing.

[0021] In some further embodiments, the first opening is located on the end face of the fixed shaft, and the second opening is located on one side of the stator.

[0022] In some further embodiments, the radial section of the sealing ring includes an outer ring, an inner ring, a connecting portion, a main lip, and a secondary lip. The outer ring and the inner ring are coaxially arranged, the connecting portion is located between the outer ring and the inner ring, and the connecting portion connects the outer ring and the inner ring. The main lip and the secondary lip are disposed on the inner surface of the inner ring from the outside to the inside.

[0023] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0024] In this invention, the housing serves as the mounting and fixing structure for each magnet. Simultaneously, as part of the rotor, the housing is also a structure for external power output, specifically a connecting structure at the end of the housing. This connecting structure connects to and drives the hub, enabling it to function as a hub motor. Furthermore, the housing is rotatably assembled with a fixed shaft, and a sealing ring is placed between the fixed shaft and the housing to seal the gap between them, thereby improving waterproof and dustproof performance and allowing the underwater hub motor to operate normally underwater. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the underwater hub motor of this utility model;

[0026] Figure 2 This is a cross-sectional schematic diagram of the underwater hub motor of this utility model;

[0027] Figure 3 This is an exploded view of the underwater hub motor of this utility model.

[0028] Explanation of reference numerals in the attached diagram:

[0029] 1. Fixed shaft; 11. Cable inlet channel; 111. First opening; 112. Second opening;

[0030] 2. Rotor; 21. Housing; 211. First end cover; 2111. Threaded hole; 2112. First groove; 212. Second end cover; 2121. Threaded connecting ring; 213. Sleeve; 22. Magnet; 23. Magnetic ring; 231. Second groove;

[0031] 3. Stator;

[0032] 4. Sealing ring;

[0033] 5. Bearings. Detailed Implementation

[0034] The following will refer to the appendices in the embodiments of this application. Figure 1 To be continued Figure 3 The technical solutions in the embodiments of this application are clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0035] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in the embodiments of this application are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0036] Furthermore, the use of terms such as "first" and "second" in this application is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed in this application.

[0037] like Figure 1-3 The diagram illustrates an underwater hub motor, comprising a fixed shaft 1, a rotor 2, a stator 3, and a sealing ring 4. Specifically, the rotor 2 includes a housing 21 and several magnets 22, each magnet 22 distributed circumferentially around the stator 3 on the inner wall of the housing 21. The inner surface of the housing 21 is cylindrical, allowing the magnets 22 to naturally distribute circumferentially on the inner wall. One end of the housing 21 is a drive end, which has a connection structure for external connection. Specifically, it connects to a hub via the connection structure, thereby driving the hub to rotate. The middle of the fixed shaft 1 is located inside the housing 21, with both ends of the fixed shaft 1 extending out from both ends of the housing 21, and both ends of the fixed shaft 1 are rotatably assembled with the housing 21. The sealing ring 4 is disposed within the rotatable gap between the end of the fixed shaft 1 and the housing 21, sealing the gap between the fixed shaft 1 and the housing 21. The stator 3 is disposed inside the housing 21 and sleeved on the fixed shaft 1.

[0038] In this invention, the housing 21 serves as the mounting and fixing structure for each magnet 22. Simultaneously, as part of the rotor 2, the housing 21 is a structure for external power output, specifically a connecting structure at the end of the housing 21. This connecting structure connects to and drives the hub, enabling it to function as a hub motor. Furthermore, the housing 21 is rotatably assembled with the fixed shaft 1, and a sealing ring 4 is provided between the fixed shaft 1 and the housing 21 to seal the gap between them, thereby improving waterproof and dustproof performance and enabling the underwater hub motor to operate normally underwater.

[0039] In some embodiments of housing 21, such as Figures 1 to 3 As shown, the housing 21 includes a sleeve 213 and a first end cap 211 and a second end cap 212 respectively disposed at both ends of the sleeve 213. The first end cap 211 is the driving end, that is, the connecting structure is disposed on the first end cap 211, for example, it can be disposed on the outside of the first end cap 211, or disposed on the outer circumferential surface of the first end cap 211. A plurality of magnets 22 are disposed on the inner wall of the sleeve 213. The housing 21 of this utility model is cylindrical in shape, which has better adaptability to wide and flat wheel hubs.

[0040] In this embodiment, the housing 21 includes a first end cap 211, a sleeve 213 and a second end cap 212 connected in sequence in the axial direction, so that the housing 21 is cylindrical in shape, that is, the underwater hub motor is a cylindrical structure.

[0041] In some embodiments of the first end cap 211, such as Figure 3 As shown, the first end cap 211 is provided with a plurality of threaded holes 2111 or transmission protrusions for connection with the outside. That is, the aforementioned connection structure is a plurality of threaded holes 2111 or transmission protrusions. More specifically, the aforementioned connection structure is provided on the outer side of the first end cap 211.

[0042] Furthermore, such as Figure 3 As shown, the inner side of the first end cap 211 is provided with a plurality of first grooves 2112 for assembling magnets 22, and the plurality of first grooves 2112 are evenly distributed along the circumference. The first end of the magnet 22 extends into the first groove 2112. During assembly, the spacing of the first ends of each magnet 22 can be quickly adjusted through the first grooves 2112, realizing the rapid positioning and assembly of the first ends of the magnets 22. At the same time, in actual operation, the first grooves 2112 fix the first ends of the magnets 22, which can maintain the position and spacing of the first ends of the magnets 22 and prevent the first ends of the magnets 22 from shifting.

[0043] In addition, such as Figure 2 , Figure 3 As shown, the rotor 2 also includes a retaining magnetic ring 23, which is secured within the sleeve 213 and located at one end near the second end cap 212. The retaining magnetic ring 23 has several second grooves 231 on the side near the magnet 22, which are evenly distributed circumferentially. The second end of the magnet 22 extends into the second groove 231. During assembly, the spacing between the second ends of each magnet 22 can be quickly adjusted via the second grooves 231, enabling rapid positioning and assembly of the second ends of the magnets 22. Simultaneously, during actual operation, the second grooves 231 fix the second ends of the magnets 22, maintaining the spacing between the second ends and preventing displacement of the second ends of the magnets 22.

[0044] Furthermore, the magnet 22 is fixed from both ends of the magnet 22 by the first groove 2112 and the second groove 231, respectively. The first groove 2112 fixes the position of the first end of the magnet 22 and maintains the spacing, while the second groove 231 maintains the spacing of the second end of the magnet 22. This speeds up the assembly of the magnet 22 as a whole and keeps the position of the magnet 22 stable, preventing the magnet 22 from shifting.

[0045] In an alternative embodiment, the first groove 2112 on the inner side of the first end cap 211 is provided with a plurality of first protrusions for assembling magnets 22, the plurality of first protrusions being evenly distributed along the circumference. The first protrusions extend into the gap between the first ends of adjacent magnets 22.

[0046] In an alternative embodiment, the second groove 231 on the magnetic ring 23 has a plurality of second protrusions on the side of the magnetic ring 23 near the magnet 22, and the plurality of second protrusions are evenly distributed along the circumference. The second protrusions extend into the gap between the second ends of the adjacent magnets 22.

[0047] In the sealing embodiment of housing 21, the first end cap 211 is welded or sealed to sleeve 213, thereby increasing the sealing effect of the first end cap 211 during assembly.

[0048] like Figure 2 , Figure 3 As shown, the second end cap 212 is provided with a threaded connecting ring 2121. The end of the threaded connecting ring 2121 away from the magnet 22 has an annular groove filled with sealant. The threaded connecting ring 2121 is embedded in the sleeve 213 and threadedly engages with the sleeve 213. The threaded connecting ring 2121 on the second end cap 212, and its connection to the sleeve 213, facilitates the assembly of the housing 21 and its internal structure. Simultaneously, the annular groove increases the sealing performance of the threaded engagement, improving the sealing effect of the housing 21 and making the underwater hub motor more adaptable to underwater working environments.

[0049] In some embodiments with fixed shaft 1, such as Figure 2 As shown, one end of the fixed shaft 1 is provided with an axially extending inlet channel 11. The two ends of the inlet channel 11 are respectively provided with a first opening 111 and a second opening 112. The first opening 111 is located outside the housing 21, and the second opening 112 is located inside the housing 21. In this way, external wires can enter the housing 21 through the inlet channel 11, thereby inputting electrical energy to the underwater hub motor. Furthermore, the fixed installation characteristic of the fixed shaft 1 itself can be reused, allowing the wires to remain in a stable and stationary environment.

[0050] In addition, the inlet channel 11 can also be filled with sealant to seal the channel after the wires are laid, thereby increasing the waterproof performance of the underwater hub motor.

[0051] Specifically, the first opening 111 is located on the end face of the fixed shaft 1, which facilitates the installation of the end of the fixed shaft 1 and the fixing of the nut. The second opening 112 is located on one side of the stator 3, more specifically, inside the second end cover 212.

[0052] Specifically, the radial section of the aforementioned sealing ring 4 includes an outer ring, an inner ring, a connecting part, a main lip, and a secondary lip. The outer ring and the inner ring are coaxially arranged, the connecting part is located between the outer ring and the inner ring, and the connecting part connects the outer ring and the inner ring. The main lip and the secondary lip are arranged on the inner surface of the inner ring from the outside to the inside.

[0053] Also, such as Figure 2 As shown, the underwater hub motor also includes two bearings 5, which are respectively located at both ends of the fixed shaft 1. The first end cover 211 and the second end cover 212 are rotatably assembled with the fixed shaft 1 through the bearings 5.

[0054] The above embodiments are merely preferred embodiments of this utility model and should not be construed as limiting the scope of protection of this utility model. Any non-substantial changes and substitutions made by those skilled in the art based on this utility model shall fall within the scope of protection claimed by this utility model.

Claims

1. An underwater hub motor, characterized in that, The underwater hub motor includes a fixed shaft, a rotor, a stator, and a sealing ring; The rotor includes a housing and a plurality of magnets, each of the magnets being distributed circumferentially around the stator on the inner wall of the housing. One end of the housing is provided as a driving end, and the driving end is provided with a connection structure for connecting to the outside. The middle part of the fixed shaft is located inside the housing, and the two ends of the fixed shaft extend out of the two ends of the housing, and the two ends of the fixed shaft are rotatably assembled with the housing. The sealing ring is disposed in the rotational assembly gap between the end of the fixed shaft and the housing, and is used to seal the gap between the fixed shaft and the housing; The stator is disposed inside the housing and sleeved on the fixed shaft.

2. The underwater hub motor as described in claim 1, characterized in that, The housing includes a sleeve and a first end cap and a second end cap respectively disposed at both ends of the sleeve, wherein the first end cap is the driving end; Several of the magnets are disposed on the inner wall of the sleeve.

3. The underwater hub motor as described in claim 2, characterized in that, The first end cap is provided with several threaded holes or transmission protrusions for connection with the outside.

4. The underwater hub motor as described in claim 2, characterized in that, The inner side of the first end cap is provided with a plurality of first grooves for assembling magnets, and the plurality of first grooves are evenly distributed along the circumference. The first end of the magnet extends into the first groove.

5. The underwater hub motor as described in claim 4, characterized in that, The rotor also includes a magnetic ring, which is snapped into the sleeve and located at one end near the second end cap. The magnetic ring has a plurality of second grooves on the side near the magnet, and the plurality of second grooves are evenly distributed along the circumference. The second end of the magnet extends into the second groove.

6. The underwater hub motor as described in claim 2, characterized in that, The first end cap is welded to or sealed to the sleeve.

7. The underwater hub motor as described in claim 2 or 6, characterized in that, The second end cap is provided with a threaded connecting ring, and the end of the threaded connecting ring away from the magnet is provided with an annular groove, which is filled with sealant. The threaded connecting ring is embedded in the sleeve and engages with the sleeve's threads.

8. The underwater hub motor as described in claim 1, characterized in that, One end of the fixed shaft is provided with an axially extending inlet channel, and the two ends of the inlet channel are respectively provided with a first opening and a second opening. The first opening is located outside the housing, and the second opening is located inside the housing.

9. The underwater hub motor as described in claim 8, characterized in that, The first opening is located on the end face of the fixed shaft, and the second opening is located on one side of the stator.

10. The underwater hub motor as described in claim 1, characterized in that, The radial section of the sealing ring includes an outer ring, an inner ring, a connecting portion, a main lip, and a secondary lip. The outer ring and the inner ring are coaxially arranged. The connecting portion is located between the outer ring and the inner ring and connects the outer ring and the inner ring. The main lip and the secondary lip are disposed on the inner surface of the inner ring from the outside to the inside.

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