A wheel hub motor of an electric two-wheeled vehicle and an electric two-wheeled vehicle

Abstract

This utility model belongs to the field of electric two-wheeler technology, and discloses a hub motor for an electric two-wheeler and the electric two-wheeler itself. The hub motor includes a motor shaft, a stator assembly, a rubber storage flange, and lead wires. The stator assembly is mounted on the motor shaft, and the rubber storage flange is mounted on the motor shaft. The first end of the rubber storage flange has multiple wire-passing holes, and the second end of the rubber storage flange abuts against the stator assembly. The second end of the rubber storage flange also has a wire-passing groove, and the multiple wire-passing holes mate with the wire-passing groove. The lead wires pass through the rubber storage flange, with one end extending from the wire-passing hole and the other end leading out from the wire-passing groove. Sealant is filled into the wire-passing groove to fix the lead wires. The hub motor of this electric two-wheeler has high sealing performance and high reliability at the lead wire position, and can effectively alleviate the problems of oil leakage from the lead wire sheath and short circuits caused by damage to the lead wire sheath.

Description

Technical Field

[0001] This utility model relates to the field of electric two-wheel technology, and in particular to a hub motor for an electric two-wheeler and an electric two-wheeler. Background Technology

[0002] Traditional electric two-wheeler hub motors typically use air as the heat dissipation medium, relying on air to transfer the heat generated during motor operation. However, because air's thermal conductivity is far lower than that of liquids, and the motor cavity is in a relatively sealed state, effective heat exchange between the internal components and the external environment is difficult. Under frequent hot and cold cycles, trace amounts of water vapor in localized areas within the cavity will liquefy and cannot be discharged in time. Long-term accumulation will lead to rust and corrosion of critical components such as the stator, magnets, and rotor, thus affecting the overall performance and lifespan of the motor. The introduction of liquid cooling technology has effectively alleviated the problems of low heat dissipation efficiency, easy corrosion, and unstable performance in traditional motors. However, the injection of cooling oil also brings a series of new challenges, such as motor oil leakage and oil seepage from high-temperature copper wires. Innovative technologies such as shaft hole sealing, end cover sealing, and air pipe sealing have achieved effective control to some extent to address these problems, but with continuous innovation in motor structure, existing lead wire sealing structures can no longer meet the needs of use. Utility Model Content

[0003] The first objective of this invention is to provide a hub motor for an electric two-wheeled vehicle. The hub motor of this electric two-wheeled vehicle has high sealing performance and high reliability at the lead wire position, which can effectively alleviate the problems of oil leakage from the lead wire sheath and short circuit caused by damage to the lead wire sheath.

[0004] The second objective of this utility model is to provide an electric two-wheeled vehicle that has high reliability, low failure rate, and high user satisfaction.

[0005] To achieve this objective, the present invention adopts the following technical solution:

[0006] This utility model discloses a hub motor for an electric two-wheeled vehicle, comprising: a motor shaft; a stator assembly mounted on the motor shaft; a rubber flange mounted on the motor shaft, wherein the first end of the rubber flange has multiple wire holes, the second end of the rubber flange abuts against the stator assembly, and the second end of the rubber flange has a wire groove, wherein the multiple wire holes mate with the wire groove; a lead wire passing through the rubber flange, wherein one end of the lead wire extends from the wire hole and the other end extends from the wire groove; and sealant filling the wire groove to fix the lead wire.

[0007] In some embodiments, the glue storage flange has a central hole that mates with the motor shaft, and a plurality of wire passage holes are distributed circumferentially at intervals along the central hole.

[0008] In some specific embodiments, the central angle of the sector area where the plurality of wire holes are located is 120°-150°.

[0009] In some embodiments, the wire guide groove is formed as an arc-shaped groove extending circumferentially along the motor shaft.

[0010] In some specific embodiments, the central angle of the arc groove is 120°-150°.

[0011] In some embodiments, the glue storage flange includes a first cylindrical portion, a second cylindrical portion, and a third cylindrical portion connected in sequence, wherein the diameter of the second cylindrical portion is larger than the diameter of the first cylindrical portion, and the diameter of the first cylindrical portion is larger than the diameter of the third cylindrical portion; wherein the wire passage hole is disposed through the first cylindrical portion and the second cylindrical portion, and the wire passage groove is disposed on the side of the third cylindrical portion opposite to the second cylindrical portion.

[0012] In some specific embodiments, the third cylindrical portion is provided with an annular groove.

[0013] In some embodiments, the stator assembly is provided with a convex ring portion, the convex ring portion is sleeved on the motor shaft, and the second end of the glue storage flange abuts against the convex ring portion.

[0014] In some embodiments, the glue storage flange is interference-fitted with the motor shaft.

[0015] This utility model also discloses an electric two-wheeled vehicle, including a vehicle body and a hub motor of the electric two-wheeled vehicle as described above, wherein the hub motor of the electric two-wheeled vehicle is mounted on the vehicle body.

[0016] The beneficial effects of the hub motor for this electric two-wheeled vehicle are as follows: During the actual assembly process, the lead wires are first threaded onto the rubber storage flange according to the process requirements, so that one end of the lead wire extends from the wire passage hole and the other end exits from the wire passage groove. Then, the stator assembly is installed on the motor shaft. Next, the rubber storage flange with the lead wire installed is installed on the motor shaft, with the second end of the rubber storage flange abutting against the stator assembly. Then, sealant is injected into the wire passage groove and left to cure for a period of time. Because the wire passage groove where the second end of the rubber storage flange mates with the lead wire is filled with sealant, the technical problem of oil leakage from the lead wire sheath can be effectively solved. Meanwhile, the first end of the rubber storage flange is provided with multiple wire holes, and multiple lead wires are respectively passed through the multiple wire holes. The multiple lead wires are separated at the first end of the rubber storage flange, and at the second end of the rubber storage flange, the multiple lead wires are separated by cured sealant. This can not only prevent the lead wires from getting tangled, but also reduce the short circuit caused by damage to the outer sheath of the lead wires. This helps to reduce the failure rate of the hub motor of the electric two-wheeler and improve user satisfaction.

[0017] The beneficial effects of this utility model of electric two-wheeled vehicle are as follows: Due to the presence of the hub motor of the electric two-wheeled vehicle described above, the hub motor has high sealing performance and high reliability at the lead wire position, which can effectively alleviate the problems of oil leakage from the lead wire sheath and short circuit caused by damage to the lead wire sheath. As a result, the electric two-wheeled vehicle disclosed in this utility model has high reliability, low failure rate, and high user satisfaction.

[0018] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the hub motor of the electric two-wheeled vehicle according to an embodiment of the present invention;

[0020] Figure 2 This is an exploded view of the hub motor of the electric two-wheeled vehicle according to an embodiment of the present invention;

[0021] Figure 3 This is a cross-sectional view of the hub motor of the electric two-wheeled vehicle according to an embodiment of the present invention.

[0022] Figure label:

[0023] 100, Motor shaft; 200, Stator assembly; 210, Raised ring; 300, Adhesive storage flange; 301, Wire channel; 302, Wire hole; 303, Center hole; 310, First cylindrical part; 320, Second cylindrical part; 330, Third cylindrical part; 331, Annular groove; 400, Lead wire; 500, Sealant. Detailed Implementation

[0024] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0025] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0026] In the description of this embodiment, the terms "upper," "lower," "left," "right," "front," and "rear," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0027] This utility model discloses a hub motor for an electric two-wheeled vehicle, referenced... Figures 1-3As shown, the hub motor of the electric two-wheeled vehicle includes a motor shaft 100, a stator assembly 200, a rubber storage flange 300, and a lead wire 400. The stator assembly 200 is mounted on the motor shaft 100, and the rubber storage flange 300 is mounted on the motor shaft 100. The first end of the rubber storage flange 300 is provided with multiple wire holes 302, and the second end of the rubber storage flange 300 abuts against the stator assembly 200. The second end of the rubber storage flange 300 is provided with a wire groove 301, and the multiple wire holes 302 all cooperate with the wire groove 301. The lead wire 400 passes through the rubber storage flange 300, with one end of the lead wire 400 extending from the wire hole 302 and the other end leading out from the wire groove 301. Sealant 500 is filled in the wire groove 301 to fix the lead wire 400. Understandably, during the actual assembly process, the lead wires 400 are first threaded onto the glue storage flange 300 according to the process requirements, with one end of the lead wire 400 extending from the wire hole 302 and the other end exiting from the wire groove 301. Then, the stator assembly 200 is installed onto the motor shaft 100. Next, the glue storage flange 300 with the lead wires 400 installed is installed onto the motor shaft 100, ensuring that the second end of the glue storage flange 300 abuts against the stator assembly 200. Then, sealant 500 is injected into the wire groove 301 and allowed to cure for a period of time. Because the wire groove 301, where the second end of the glue storage flange 300 mates with the lead wire 400, is filled with sealant 500, the technical problem of oil leakage from the outer sheath of the lead wire 400 is effectively solved. Meanwhile, the first end of the rubber storage flange 300 is provided with multiple wire passage holes 302, and multiple lead wires 400 are respectively passed through the multiple wire passage holes 302. At the first end of the rubber storage flange 300, the multiple lead wires 400 are separated, and at the second end of the rubber storage flange 300, the multiple lead wires 400 are separated by cured sealant 500. This not only avoids the phenomenon of the lead wires 400 tangling with each other, but also reduces the phenomenon of short circuits caused by damage to the outer sheath of the lead wires 400, thereby helping to reduce the failure rate of the hub motor of the electric two-wheeler and improve user satisfaction. It should be noted that the hub motor of the electric two-wheeler in this embodiment should also include rotor assembly, liquid cooling structure, and other mechanisms. These structures are all prior art, and there is no need to limit the above structures here.

[0028] Optionally, the sealant 500 is a polymer material. Polymer materials have excellent properties such as oil resistance, high temperature resistance, and good adhesion, which can effectively prevent the penetration of liquid cooling oil. Of course, in other embodiments of this utility model, the sealant 500 can also be selected from other materials according to actual needs.

[0029] Optional, see reference Figure 2As shown, the glue storage flange 300 has a central hole 303 that mates with the motor shaft 100, and multiple wire passage holes 302 are distributed circumferentially around the central hole 303. It can be understood that the circumferential distribution of the multiple wire passage holes 302 around the central axis facilitates the installation of the lead wires 400 by workers, preventing the lead wires 400 from becoming entangled, and also simplifies the manufacturing of the glue storage flange 300, thus reducing manufacturing costs.

[0030] Optionally, the central angle of the sector area where the multiple wire holes 302 are located is 120°-150°. Specifically, the central angle of the sector area where the multiple wire holes 302 are located can be 120°, 121°, 122°, 123°, 124°, 125°, 126°, 127°, 128°, 129°, 130°, 131°, 132°, 133°, 134°, 135°, 136°, 137°, 138°, 139°, 140°, 141°, 142°, 143°, 144°, 145°, 146°, 147°, 148°, 149°, or 150°. Of course, it can also be other values ​​within the range of 120°-150°, and is not limited to the examples mentioned above. Understandably, if the central angle of the sector area containing the multiple through holes 302 is too small, the distance between two adjacent through holes 302 will be small, resulting in a smaller wall thickness between adjacent through holes 302, reducing the strength of the glue storage flange 300 and making it prone to damage during transportation and assembly. Conversely, if the central angle of the sector area containing the multiple through holes 302 is too large, the distance between two adjacent lead wires 400 will be too large, easily causing interference with other structures. In this embodiment, the central angle of the sector area containing the multiple through holes 302 is set to 120°-150°, ensuring that the distance between two adjacent through holes 302 is at a suitable distance, which can guarantee the strength of the entire glue storage flange 300 and avoid interference between the lead wires 400 and other structures. It should be noted that the shape, size, and number of through holes 302 can be selected according to actual needs. In this embodiment, all through holes 302 are round holes, and the number is five.

[0031] Optional, see reference Figure 2 As shown, the wire guide groove 301 is formed as an arc-shaped groove extending circumferentially along the motor shaft 100. It can be understood that forming the wire guide groove 301 as an arc-shaped groove extending circumferentially along the motor shaft 100 facilitates manufacturing, simplifies the structure of the glue storage flange 300, and reduces manufacturing costs.

[0032] Further optionally, the central angle of the arc groove is 120°-150°. Specifically, the central angle of the arc groove can be 120°, 121°, 122°, 123°, 124°, 125°, 126°, 127°, 128°, 129°, 130°, 131°, 132°, 133°, 134°, 135°, 136°, 137°, 138°, 139°, 140°, 141°, 142°, 143°, 144°, 145°, 146°, 147°, 148°, 149°, or 150°, or other values ​​within the range of 120°-150°, and is not limited to the examples mentioned above. Understandably, a small central angle of the arc groove will cause the distance between two adjacent lead wires 400 to be too close, increasing the probability of the lead wires 400 getting tangled together. An excessively large central angle of the arc groove will reduce the strength of the rubber storage flange 300 and increase the probability of damage to the rubber storage flange 300.

[0033] refer to Figure 2 As shown, the adhesive storage flange 300 includes a first cylindrical portion 310, a second cylindrical portion 320, and a third cylindrical portion 330 connected in sequence. The diameter of the second cylindrical portion 320 is larger than the diameter of the first cylindrical portion 310, and the diameter of the first cylindrical portion 310 is larger than the diameter of the third cylindrical portion 330. A wire-passing hole 302 is provided through the first cylindrical portion 310 and the second cylindrical portion 320, and a wire-passing groove 301 is provided on the side of the third cylindrical portion 330 opposite to the second cylindrical portion 320. It is understood that placing the wire-passing hole 302 in the larger diameter first cylindrical portion 310 and the second cylindrical portion 320 ensures the strength of the adhesive storage flange 300, and placing the wire-passing groove 301 in the third cylindrical portion 330 facilitates the pouring of sealant 500 into the wire-passing groove 301.

[0034] Optionally, the third cylindrical portion 330 is provided with an annular groove 331. During actual assembly, a snap-fit ​​structure can be installed in the annular groove 331 to position the glue storage flange 300 and prevent the glue storage flange 300 from moving axially along the motor shaft 100.

[0035] refer to Figure 2 As shown, the stator assembly 200 is provided with a convex ring portion 210, which is sleeved on the motor shaft 100. The second end of the glue storage flange 300 abuts against the convex ring portion 210. It can be understood that by providing the convex ring portion 210 on the stator assembly 200, during actual installation, the glue storage flange 300 is sleeved on the motor shaft 100, and then a press is used to press the glue storage flange 300 into the motor shaft 100 and make it abut against the convex ring portion 210. This ensures the installation stability of the glue storage flange 300, thereby ensuring the stability of the lead wire 400.

[0036] refer to Figure 2As shown, the glue storage flange 300 is interference-fitted with the motor shaft 100. This facilitates the assembly of the glue storage flange 300 and the motor shaft 100. Of course, in other embodiments of this utility model, the glue storage flange 300 can also be connected to the motor shaft 100 via a connecting key, and is not limited to the interference fit method.

[0037] The advantages of the hub motor of this electric two-wheeled vehicle are as follows:

[0038] First: Solve the problem of oil leakage from the outer sheath of the 400 lead wire. The 500 high-polymer sealant has excellent properties such as oil resistance, high temperature resistance and good adhesion, which prevents liquid cooling oil from penetrating.

[0039] Second: It avoids short circuits caused by damage to the 400 lead wire and tangling between the 400 lead wires;

[0040] Third: Can match 4mm 2 With lead wires of 400 and below, it is more practical.

[0041] This utility model also discloses an electric two-wheeled vehicle, including a vehicle body and a hub motor as described above, the hub motor being mounted on the vehicle body. Due to the presence of the hub motor, the lead wire 400 of the hub motor has high sealing performance and high reliability, effectively mitigating oil leakage from the outer sheath of the lead wire 400 and short circuit problems caused by damage to the outer sheath of the lead wire 400. This results in a high reliability, low failure rate, and high user satisfaction for the electric two-wheeled vehicle disclosed in this utility model.

[0042] In the description of this specification, references to terms such as "some embodiments," "other embodiments," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0043] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A hub motor for an electric two-wheeled vehicle, characterized in that, include: Motor shaft (100); A stator assembly (200) is mounted on the motor shaft (100); A glue storage flange (300) is installed on the motor shaft (100), and the first end of the glue storage flange (300) is provided with a plurality of wire passage holes (302), the second end of the glue storage flange (300) abuts against the stator assembly (200), and the second end of the glue storage flange (300) is provided with a wire passage groove (301), and the plurality of wire passage holes (302) all cooperate with the wire passage groove (301); Lead wire (400) is inserted through the glue storage flange (300), one end of the lead wire (400) extends out from the wire hole (302), and the other end is led out from the wire groove (301); A sealant (500) is filled in the wire groove (301) to fix the lead wire (400).

2. The hub motor of the electric two-wheeled vehicle according to claim 1, characterized in that, The glue storage flange (300) has a central hole (303) that mates with the motor shaft (100), and a plurality of wire passage holes (302) are distributed circumferentially along the central hole (303).

3. The hub motor of the electric two-wheeled vehicle according to claim 2, characterized in that, The central angle of the sector area where the multiple wire holes (302) are located is 120°-150°.

4. The hub motor of the electric two-wheeled vehicle according to claim 1, characterized in that, The wire groove (301) is formed as an arc-shaped groove extending circumferentially along the motor shaft (100).

5. The hub motor of the electric two-wheeled vehicle according to claim 4, characterized in that, The central angle of the arc-shaped groove is 120°-150°.

6. The wheel hub motor of the electric two-wheeler as claimed in claim 1, wherein, The glue storage flange (300) includes a first cylindrical part (310), a second cylindrical part (320) and a third cylindrical part (330) connected in sequence. The diameter of the second cylindrical part (320) is larger than the diameter of the first cylindrical part (310), and the diameter of the first cylindrical part (310) is larger than the diameter of the third cylindrical part (330). The wire hole (302) is provided through the first cylindrical part (310) and the second cylindrical part (320), and the wire groove (301) is provided on the side of the third cylindrical part (330) away from the second cylindrical part (320).

7. The wheel hub motor of the electric two-wheeler as claimed in claim 6, wherein, The third cylindrical part (330) is provided with an annular groove (331).

8. The wheel hub motor of the electric two-wheeler as claimed in claim 1, wherein, The stator assembly (200) is provided with a convex ring portion (210), the convex ring portion (210) is sleeved on the motor shaft (100), and the second end of the glue storage flange (300) abuts against the convex ring portion (210).

9. The wheel hub motor of the electric two-wheeler as claimed in claim 1, wherein, The glue storage flange (300) is interference-fitted with the motor shaft (100).

10. An electric two-wheeled vehicle characterized by comprising: The vehicle includes a vehicle body and a hub motor for an electric two-wheeled vehicle as described in any one of claims 1-9, wherein the hub motor of the electric two-wheeled vehicle is mounted on the vehicle body.

Images