Outer ring rotor of in-wheel motor and in-wheel motor

Abstract

The utility model relates to the technical field of wheel hub motor, concretely is a kind of outer ring rotor of wheel hub motor and wheel hub motor, including wheel rim main body, wheel rim main body includes annular left wheel rim and annular right wheel rim, detachable fixed connection between left wheel rim and right wheel rim, the inner ring surface of left wheel rim and right wheel rim is fixed with magnetic conducting ring, and the inner ring surface of magnetic conducting ring is detachably connected with several permanent magnets.The utility model divides wheel rim main body into left and right two wheel rims, and the installation groove on two magnetic conducting rings can be extruded to permanent magnet by the connection of left and right wheel rims, so as to install permanent magnet on the inner ring surface of magnetic conducting ring, when disassembling all permanent magnets, just separate left and right two wheel rims, permanent magnet can be made to fall from installation groove, and the disassembly process of permanent magnet is more rapid.

Description

Technical Field

[0001] This utility model relates to the field of hub motor technology, specifically to an outer rotor of a hub motor and a hub motor. Background Technology

[0002] A hub motor is a drive system that integrates an electric motor directly into the wheel hub. It eliminates traditional mechanical components such as drive shafts and differentials, making the vehicle's power transmission more direct and efficient.

[0003] Currently, in the hub motor system of electric vehicles, the outer rotor is the core component that directly drives the wheel rotation. Existing outer rotors consist of a rim and a magnetic ring. The magnetic ring is fixed to the inner ring wall of the rim, and the permanent magnets on the outer rotor are typically bonded to the inner ring surface of the magnetic ring using anaerobic adhesive to achieve connection with the outer rotor. However, this connection method not only requires the use of a large amount of anaerobic adhesive, but also necessitates the removal of several permanent magnets individually during disassembly. This process is time-consuming, and the adhesion between the permanent magnets and the anaerobic adhesive during disassembly increases the difficulty of removing the permanent magnets. Furthermore, anaerobic adhesive residue may remain on the magnetic ring and permanent magnets, affecting the installation of new permanent magnets. Therefore, we propose an outer rotor and hub motor for a hub motor to effectively address these drawbacks. Utility Model Content

[0004] The purpose of this utility model is to provide an outer rotor of a hub motor and a hub motor to solve the problems mentioned in the background art.

[0005] This utility model is achieved through the following technical solution: an outer rotor of a hub motor, including a rim body, the rim body including an annular left rim and an annular right rim, the left rim and the right rim being detachably fixedly connected, and a magnetic guide ring being fixedly provided on the inner ring surface of the left rim and the right rim, and a plurality of permanent magnets being detachably connected to the inner ring surface of the magnetic guide ring.

[0006] Optionally, the right rim has a number of protrusions arranged circumferentially on the side facing the left rim, and the left rim has a number of grooves on the side facing the right rim. The grooves and protrusions correspond one-to-one, and the grooves are used for the protrusions to be inserted.

[0007] Optionally, the groove and the protrusion are interference-fitted.

[0008] Optionally, a plurality of first threaded holes are provided on the outer ring surface of the left wheel rim, and the plurality of first threaded holes and a plurality of grooves correspond one to one. The first threaded holes and the grooves are connected. A second threaded hole is provided on the protrusion. When the protrusion is fully embedded in the groove, the second threaded hole and the first threaded hole are aligned and distributed. A locking bolt is connected in both the first threaded hole and the second threaded hole.

[0009] Optionally, several mounting slots are provided on the inner ring surface of both magnetic rings. The mounting slots are arranged in a circle and are used to embed several permanent magnets.

[0010] Optionally, the mounting groove is U-shaped, and the openings of the mounting grooves on the two magnetic rings are arranged facing each other. When the facing surfaces of the two magnetic rings are in contact, the mounting grooves on the two magnetic rings cooperate to form a rectangular groove. The rectangular groove is used to accommodate the permanent magnet to fix the permanent magnet on the inner ring surface of the magnetic ring.

[0011] Optionally, the cross-sectional shape of the rectangular groove formed by the two mounting slots is an isosceles trapezoid, the bottom width of the rectangular groove is greater than the opening width, and the shape of the permanent magnet is adapted to the shape of the rectangular groove.

[0012] A hub motor comprising an outer rotor as described in any of the preceding claims.

[0013] Compared with the prior art, the present invention provides an outer rotor for a hub motor and a hub motor, which has the following advantages:

[0014] 1. This utility model divides the wheel rim body into two wheel rims, left and right. The connection between the left and right wheel rims allows the mounting grooves on the two magnetic rings to compress the permanent magnet, thereby mounting the permanent magnet on the inner ring surface of the magnetic ring. When disassembling all the permanent magnets, simply separate the left and right wheel rims to allow the permanent magnet to fall from the mounting groove, making the disassembly process of the permanent magnet faster.

[0015] 2. This utility model forms a rectangular groove by having the mounting grooves on two magnetic rings cooperate with each other. The cross-section of the rectangular groove and the permanent magnet are both set as isosceles trapezoidal structures, so that the permanent magnet cannot be detached from the rectangular groove after being accommodated, thus achieving the purpose of fixing and installing the permanent magnet without anaerobic adhesive. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the split structure of the left and right wheel rims of this utility model;

[0018] Figure 3This is a front sectional view of the present invention;

[0019] Figure 4 for Figure 3 Enlarged structural diagram at point A in the middle.

[0020] In the figure: 1. Wheel rim body; 101. Left wheel rim; 1011. Groove; 1012. First threaded hole; 102. Right wheel rim; 1021. Protrusion; 1022. Second threaded hole; 2. Magnetic ring; 201. Mounting groove; 3. Permanent magnet. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Example 1: Please refer to Figure 1 - Figure 4 An outer rotor of a hub motor includes a rim body 1, which comprises an annular left rim 101 and an annular right rim 102. The left rim 101 and the right rim 102 are detachably fixedly connected. Magnetic guide rings 2 are fixedly provided on the inner annular surfaces of both the left rim 101 and the right rim 102. A plurality of permanent magnets 3 are detachably connected to the inner annular surface of the magnetic guide rings 2. This allows the left rim 101 and the right rim 102 to be separated when the user needs to remove all the permanent magnets 3, thus facilitating the removal of the permanent magnets 3.

[0023] The left wheel rim 101 and the magnetic ring 2, as well as the right wheel rim 102 and the magnetic ring 2, are connected together by laser welding or silver-based brazing. The magnetic ring 2 is magnetic, so that the permanent magnet 3 can be attracted to the magnetic ring 2.

[0024] Furthermore, the right rim 102 has a number of protrusions 1021 arranged circumferentially on the side facing the left rim 101, and the left rim 101 has a number of grooves 1011 on the side facing the right rim 102. The grooves 1011 and the protrusions 1021 correspond one-to-one, and the grooves 1011 are used for the protrusions 1021 to be inserted.

[0025] In this embodiment, the protrusion 1021 is fixedly connected to the right wheel rim 102, and the protrusion 1021 is flat and arc-shaped, with the shapes of the protrusion 1021 and the groove 1011 matching. When the protrusion 1021 is embedded in the groove 1011, there is an interference fit between the groove 1011 and the protrusion 1021 to complete the initial connection between the left wheel rim 101 and the right wheel rim 102.

[0026] On the other hand, a plurality of first threaded holes 1012 are provided on the outer ring surface of the left wheel rim 101. The plurality of first threaded holes 1012 and a plurality of grooves 1011 correspond one-to-one. The first threaded holes 1012 and the grooves 1011 are connected. A second threaded hole 1022 is provided on the protrusion 1021. When the protrusion 1021 is fully embedded in the groove 1011, the second threaded hole 1022 and the first threaded hole 1012 are aligned and distributed. A locking bolt is connected in both the first threaded hole 1012 and the second threaded hole 1022.

[0027] The first threaded hole 1012 and the second threaded hole 1022 have the same diameter so that screws or bolts can be inserted into the first threaded hole 1012 and the second threaded hole 1022, thereby fixing the protrusion 1021 in the groove 1011 to complete the connection and fixation of the left wheel rim 101 and the right wheel rim 102.

[0028] In this embodiment, several mounting grooves 201 are provided on the inner ring surface of both magnetic rings 2. The mounting grooves 201 are arranged in a circle and are used for embedding several permanent magnets 3.

[0029] Specifically, the mounting groove 201 is U-shaped, and the openings of the mounting groove 201 on the two magnetic rings 2 are arranged facing each other. Therefore, when installing the permanent magnet 3, the permanent magnet 3 can be inserted into the mounting groove 201 from the facing surfaces of the two magnetic rings 2, so that the permanent magnet 3 can be attracted into the mounting groove 201.

[0030] It should be noted that when the opposing surfaces of the two magnetic rings 2 are in contact, the mounting grooves 201 on the two magnetic rings 2 cooperate to form a rectangular groove. This rectangular groove is used to accommodate the permanent magnet 3 to fix the permanent magnet 3 on the inner ring surface of the magnetic ring 2. The opposing surfaces of the two magnetic rings 2 are flush with the opposing surfaces of the left rim 101 and the right rim 102, respectively, so that when the left rim 101 and the right rim 102 are connected together and their opposing surfaces are in contact, the opposing surfaces of the two magnetic rings 2 can also be in contact. This allows the mounting grooves 201 on the two magnetic rings 2 to compress the permanent magnet 3 in the middle, thereby strengthening the fixation of the permanent magnet 3.

[0031] In order to prevent the permanent magnet 3 from detaching from the magnetic ring 2 after installation, in this application, the cross-sectional shape of the rectangular groove formed by the two mounting grooves 201 is an isosceles trapezoid, the bottom width of the rectangular groove is greater than the opening width, and the shape of the permanent magnet 3 is adapted to the shape of the rectangular groove.

[0032] like Figure 4As shown, the rectangular groove formed by the two mounting slots 201 has a smaller distance between the two sides of the opening than the distance between the two sides of the bottom wall, exhibiting a structure that is wider on the inside and narrower on the outside. Therefore, when the permanent magnet 3 is accommodated in the rectangular groove, the permanent magnet 3 cannot move up and down within the rectangular groove, thus achieving the installation and fixation of the permanent magnet 3. This allows for the installation of the permanent magnet 3 without the use of anaerobic adhesive. When removing and replacing all the permanent magnets 3, simply separate the left rim 101 and the right rim 102 to pour all the permanent magnets 3 out of the mounting slots 201, making the process of disassembling and replacing all the permanent magnets 3 faster and eliminating any residue of anaerobic adhesive.

[0033] Example 2: This example provides a hub motor, including the outer rotor of the hub motor proposed in Example 1.

[0034] The working principle and usage process of this utility model are as follows: First, during installation, the left wheel rim 101 is laid flat, and the permanent magnet 3 is inserted vertically into the mounting groove 201. Then, the right wheel rim 102 is installed on the left wheel rim 101 from top to bottom, so that the protrusion 1021 is aligned with the groove 1011 and inserted. Subsequently, the left wheel rim 101 and the right wheel rim 102 are connected together with screws. At this time, the mounting grooves 201 on the two magnetic rings 2 can cooperate with each other to form a rectangular groove, thereby limiting and fixing the permanent magnet 3, and completing the installation of the permanent magnet 3.

[0035] When it is necessary to disassemble or replace all permanent magnets 3, the left rim 101 and the right rim 102 can be separated, and the permanent magnets 3 can be poured out from the mounting slot 201 without any anaerobic adhesive residue, making the disassembly process more convenient and quick.

[0036] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes the element.

[0037] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An outer rotor of a hub motor, comprising a rim body (1), characterized in that: The rim body (1) comprises an annular left rim (101) and an annular right rim (102), the left rim (101) and the right rim (102) are detachably and fixedly connected, magnetic conductive rings (2) are fixedly arranged on the inner annular surfaces of the left rim (101) and the right rim (102), and a plurality of permanent magnets (3) are detachably connected to the inner annular surface of each magnetic conductive ring (2); A plurality of protrusions (1021) are circumferentially arranged on a surface of the right rim (102) facing the left rim (101), a plurality of grooves (1011) are formed on a surface of the left rim (101) facing the right rim (102), the plurality of grooves (1011) correspond to the plurality of protrusions (1021) one to one, and the grooves (1011) are configured for the protrusions (1021) to be embedded into; A plurality of first threaded holes (1012) are formed in an outer annular surface of the left rim (101), the plurality of first threaded holes (1012) correspond to the plurality of grooves (1011) one to one, the first threaded holes (1012) are in communication with the grooves (1011), second threaded holes (1022) are formed in the protrusions (1021), when the protrusions (1021) are completely embedded into the grooves (1011), the second threaded holes (1022) are aligned with the first threaded holes (1012); and locking bolts are jointly connected in the first threaded holes (1012) and the second threaded holes (1022).

2. The outer rotor of a hub motor according to claim 1, characterized in that: Interference fit is provided between the grooves (1011) and the protrusions (1021).

3. The outer rotor of a hub motor according to claim 2, characterized in that: A plurality of mounting grooves (201) are formed on the inner annular surfaces of the two magnetic conductive rings (2), the plurality of mounting grooves (201) are arranged circumferentially, and the plurality of mounting grooves (201) are configured for the plurality of permanent magnets (3) to be embedded into.

4. The outer rotor of a hub motor according to claim 3, characterized in that: The mounting grooves (201) are C-shaped, openings of the mounting grooves (201) on the two magnetic conductive rings (2) face each other, when opposite faces of the two magnetic conductive rings (2) fit together, the mounting grooves (201) on the two magnetic conductive rings (2) cooperate with each other to form a rectangular slot, and the rectangular slot is configured to accommodate the permanent magnets (3) so as to fix the permanent magnets (3) on the inner annular surfaces of the magnetic conductive rings (2).

5. The outer rotor of a hub motor according to claim 4, characterized in that: A cross-sectional shape of the rectangular slot formed by cooperation of the two mounting grooves (201) is an isosceles trapezoid, a width of a bottom surface of the rectangular slot is greater than a width of an opening of the rectangular slot, and a shape of the permanent magnets (3) is adapted to the shape of the rectangular slot.

6. A hub motor, characterized in that: An outer rotor of an in-wheel motor according to any one of claims 1 to 5.

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