Motor suitable for side mounting on a motorcycle

Abstract

The application relates to the field of motors, and discloses a motor suitable for being hung on the side of a motorcycle, which comprises a shell, a rotor structure and a stator structure arranged in the shell, the stator structure and the rotor structure are oppositely arranged along the axial direction, the rotor structure comprises a rotating shaft rotatably inserted into the stator structure, a rotor support is arranged on the rotating shaft, a circular mounting groove is arranged on the side of the rotor support facing the stator structure, a circular rotor iron core is arranged in the mounting groove, a rotor outer ring is clamped between the outer circle of the rotor iron core and the outer side wall of the mounting groove, a rotor inner ring is clamped between the inner circle of the rotor iron core and the inner side wall of the mounting groove, and a plurality of magnetic steels are arranged on the side of the rotor iron core facing the stator structure along the circumferential direction. The mutual cooperation of the rotor outer ring, the rotor inner ring and the magnetic steel pressing strip can firmly fix the rotor iron core and the magnetic steels on the rotor support, and the problem of serious rotor heating and low efficiency caused by drilling and nailing is effectively avoided.

Description

Technical Field

[0001] This application belongs to the field of electric motors, and specifically relates to an electric motor suitable for motorcycle side-mounted applications. Background Technology

[0002] With breakthroughs in lithium battery energy density, the gradual popularization of fast charging technology, and the increasing penetration of intelligent features, the global new energy electric motorcycle market is experiencing rapid growth. Power supply, drive motor, riding mechanism, and braking system are the main components of an electric motorcycle. Among them, the drive motor, as the core power component, directly determines the vehicle's power output, energy efficiency, and user experience. People have increasingly higher performance requirements for drive motors used in electric motorcycles, demanding high continuous power and continuous torque.

[0003] Currently, the industry widely uses flat-wire radial motors to improve the continuous power and torque of motors. However, due to their large axial dimensions, radial motors are generally only suitable for mid-mounted drives and not for side-mounted drives. Furthermore, their transmission components are complex, costly, inefficient, and power-consuming. Therefore, the development of axial motors suitable for side-mounted applications has begun. When the rotor and stator of the motor are arranged axially, the rotor core, typically made of wound silicon steel sheets, has poor self-supporting properties. How to effectively fix it becomes a pressing problem. Current fixing methods include: ① drilling holes in the rotor core, which leads to severe rotor overheating and low efficiency; ② using adhesive bonding or sealing techniques, which suffer from insufficient fixing strength and low production efficiency. Utility Model Content

[0004] To overcome the problem of low efficiency caused by existing rotor cores, this application provides a motor suitable for motorcycle sidemounts that does not require drilling holes in the rotor core, thus improving motor efficiency.

[0005] To achieve the above objectives, this application provides a motor suitable for motorcycle side-mounted installation, including a housing, and a rotor structure and a stator structure disposed within the housing, wherein the stator structure and the rotor structure are arranged opposite to each other along the axial direction;

[0006] The rotor structure includes a rotating shaft rotatably inserted into the stator structure, on which a rotor support is mounted. The rotor support has an annular mounting groove on its side facing the stator structure. An annular rotor core is disposed in the mounting groove. An outer ring of the rotor core is engaged with the outer side wall of the mounting groove, and an inner ring of the rotor core is engaged with the inner side wall of the mounting groove. Multiple magnets are arranged circumferentially on the side of the rotor core facing the stator structure.

[0007] The rotor core of this application can be pre-attached to the mounting groove of the rotor bracket with adhesive, and then the outer and inner rings of the rotor are pressed into the corresponding positions. Through their joint cooperation, the rotor core is firmly fixed to the rotor bracket. This fixing method does not require drilling holes in the rotor core, effectively avoiding the problems of severe rotor overheating and low efficiency caused by drilling and nailing. Compared with existing epoxy encapsulation, it has higher production efficiency and more secure fixing.

[0008] Preferably, the magnets are fan-shaped with gaps between adjacent magnets. A magnet clamping strip is fitted into the gap, the length of which matches the mounting groove. The outer and inner ends of the magnet clamping strip abut against the corresponding sidewalls of the mounting groove. The outer end of the magnet clamping strip connects to the outer ring of the rotor, and its inner end connects to the inner ring of the rotor. With this structure, circumferential fixation of the magnets can be achieved by pressing magnet clamping strips between adjacent magnets. The two ends of the magnet clamping strips abut against the corresponding inner walls of the mounting groove and connect to the corresponding inner and outer rings of the rotor, thus providing axial fixation of the magnets. This fixing method is robust and reliable, and does not require additional drilling or nailing.

[0009] Preferably, both sides of the magnet have protrusions, each protrusion including a longer first side and a shorter second side connected to each other, wherein the second side is connected to the side of the magnet facing the rotor core, and the first side is connected to the side of the magnet facing the stator structure.

[0010] Both sides of the magnetic steel pressure strip have grooves that match the protrusions, and the protrusions are locked into the corresponding grooves.

[0011] With the above structure, the magnet and its protrusions are integrally formed and made of the same material. By having the protrusions fit into the corresponding grooves, the fixing firmness of the magnet can be further improved.

[0012] Preferably, the magnet pressure strip is triangular in shape, and the corresponding gap matches the shape of the magnet pressure strip. The small end of the magnet pressure strip is away from the rotating shaft, and its large end is close to the rotating shaft. With this structure, the triangle has a more stable structure, and the fixing firmness of the magnet can be further improved by setting the magnet pressure strip to a triangular shape.

[0013] Preferably, both the outer and inner rotor rings are made of non-metallic materials, and they are welded together at high temperature to secure them between the rotor core and the sidewall of the corresponding mounting slot. This structure, where the outer and inner rotor rings are fixed by high-temperature welding, further enhances their stability.

[0014] Preferably, the magnetic steel strip is made of a non-metallic material. The magnetic steel strip is melted by high-temperature welding to secure it within the corresponding gap and is fixedly connected to the outer and inner rings of the rotor. This structure, where the magnetic steel strip is fixed by high-temperature welding, further enhances its fixing strength.

[0015] Preferably, the stator structure includes an annular stator core, which is fixedly installed inside the housing. The stator core has winding portions evenly arranged along its circumference, and each winding portion is wound with a coil winding. Each coil winding is arranged axially in correspondence with one of the plurality of magnets.

[0016] Compared with the prior art, the present invention has the following advantages: The present application uses the cooperation of the rotor outer ring, the rotor inner ring and the magnet pressure strip to firmly fix the rotor core and the magnet on the rotor support. This fixing method does not require drilling holes in the rotor core, effectively avoiding the problem of severe rotor heating and low efficiency caused by drilling. Compared with the existing epoxy sealing, the production efficiency is higher and the fixing is more firm and reliable. Attached Figure Description

[0017] The accompanying drawings are provided to further illustrate the embodiments of this application and form part of the specification. They are used together with the following detailed description to explain the embodiments of this application, but do not constitute a limitation on the embodiments of this application. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without any inventive effort. In the drawings:

[0018] Figure 1 A schematic diagram of the external shape of a motor suitable for motorcycle side mounting;

[0019] Figure 2 Exploded view of a motor suitable for motorcycle side-mounted installation;

[0020] Figure 3 A schematic diagram of the internal structure of a motor suitable for motorcycle side-mounted installation.

[0021] Figure 4 This is an exploded view of the rotor structure;

[0022] Figure 5 for Figure 4 Enlarged view of part a in the middle. Detailed Implementation

[0023] The specific embodiments of this application will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit this application.

[0024] In the description of this application, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying 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. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0025] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., 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, an electrical connection, or a connection that allows communication between components; 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, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0026] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. 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. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0027] In this application, "multiple" means two or more.

[0028] The following description is based on the accompanying drawings.

[0029] like Figure 1-5 As shown, this application provides a motor suitable for motorcycle side mounting, including a housing, and a rotor structure 9 and a stator structure 3 disposed within the housing, wherein the stator structure 3 and the rotor structure 9 are disposed opposite each other along the axial direction;

[0030] The rotor structure 9 includes a rotating shaft 9a rotatably inserted into the stator structure 3. A rotor bracket 9b is mounted on the rotating shaft 9a. An annular mounting groove is provided on the side of the rotor bracket 9b facing the stator structure 3. An annular rotor core 9c is provided in the mounting groove. An outer rotor ring 9g is engaged between the outer circle of the rotor core 9c and the outer side wall of the mounting groove. An inner rotor ring 9f is engaged between the inner circle of the rotor core 9c and the inner side wall of the mounting groove. A plurality of magnets 9e are arranged circumferentially on the side of the rotor core 9c facing the stator structure 3.

[0031] In this application, the outer wall of the mounting groove refers to the side wall away from the rotating shaft, and the inner wall of the mounting groove refers to the side wall close to the rotating shaft. The outer wall and the inner wall of the mounting groove are opposite each other.

[0032] In some embodiments, the outer rotor ring 9g and the inner rotor ring 9f are both non-metallic materials, and they are melted by high-temperature welding to be clamped between the rotor core 9c and the side wall of the corresponding mounting groove.

[0033] In some embodiments, the magnet 9e is fan-shaped, and there is a gap 9d between adjacent magnets 9e. A magnet pressure strip 9h is fitted in the gap 9d. The length of the magnet pressure strip 9h matches the mounting groove. The outer end and inner end of the magnet pressure strip 9h abut against the corresponding side wall of the mounting groove, and the outer end of the magnet pressure strip 9h is connected to the outer ring 9g of the rotor, and its inner end is connected to the inner ring 9f of the rotor.

[0034] In this application, the outer end of the magnetic steel pressure strip refers to the end away from the rotating shaft, and the inner end of the magnetic steel pressure strip refers to the end close to the rotating shaft.

[0035] In some embodiments, the magnetic steel pressure strip 9h is triangular in shape, and the corresponding gap 9d between adjacent magnetic steels 9e matches the shape of the magnetic steel pressure strip 9h. The small end of the magnetic steel pressure strip 9h is far away from the rotating shaft 9a, and its large end is close to the rotating shaft 9a.

[0036] In some embodiments, both sides of the magnet 9e have protrusions, each protrusion including a longer first side 9j and a shorter second side 9i connected to each other, wherein the second side 9i is connected to the side of the magnet 9e facing the rotor core 9c, and the first side 9j is connected to the side of the magnet 9e facing the stator structure 3. Both sides of the magnet pressure strip 9h have grooves 9k that match the protrusions, and the protrusions are engaged in the corresponding grooves 9k.

[0037] In some embodiments, the magnetic steel pressure strip 9h is made of non-metallic material. The magnetic steel pressure strip 9h is melted by high-temperature welding to be clamped in the corresponding gap 9d and fixedly connected to the rotor outer ring 9g and the rotor inner ring 9f.

[0038] As can also be seen from the figure, the stator structure 3 includes an annular stator core 3a, which is fixedly installed inside the housing. Multiple winding portions 3b are evenly arranged on the stator core 3a along its circumference. Each winding portion 3b is wound with a coil winding 4. Each coil winding 4 is arranged axially and corresponds one-to-one with the multiple magnets 9e. The stator core 3a and the winding portions 3b are integrally formed.

[0039] The side of the magnet 9e facing the corresponding coil winding 4 is the south pole or the north pole, and the side of the magnet 9e away from the corresponding coil winding 4 along the axial direction is the north pole or the south pole (i.e., the north and south poles of a single magnet 9e are distributed along the axial direction). The south and north poles of all the magnets 9e facing the corresponding coil winding 4 are alternately distributed along the circumferential direction.

[0040] The winding portion 3b is disposed on the side of the stator core 3a facing the rotor core 9c and extends along the axial direction of the stator core 3a. The magnet 9e is disposed on the side of the rotor core 9c facing the stator core 3a. In the axial direction, each winding portion 3b and its coil winding 4 are arranged in a one-to-one correspondence with each magnet 9e.

[0041] In some embodiments, the housing includes a first end cover 2, on which a second end cover 10 is fastened and the two are fixedly connected by bolts. A portion of the first end cover 2 extends toward the second end cover 10 to form a cylindrical stator mounting portion 13 with openings at both ends. The stator core 3a is fixedly mounted on the outer circle of the stator mounting portion 13. A steel bearing chamber 7 is installed in the inner cavity of the stator mounting portion 13. A bearing 6 is fixedly installed in the bearing chamber 7, and the rotating shaft 9a is inserted into the bearing 6.

[0042] The rotor support 9b is fixedly installed on the rotating shaft 9a between the stator core 3a and the second end cover 10 of the stator structure 3. The rotating shaft 9a is provided with an annular first limiting step 12 corresponding to the rotor support 9b. The rotor support 9b is provided with an annular positioning groove around the rotating shaft 9a. The positioning groove is located in the inner circle of the mounting groove and communicates with the hole on the rotor support 9b through which the rotating shaft 9a passes. The first limiting step 12 falls in the positioning groove and the rotor support 9b abuts against the first limiting step 12. One end of the rotating shaft 9a freely passes through the second end cover 10.

[0043] In some embodiments, the rotating shaft 9a is provided with an annular second limiting step 11, which is located between the first limiting step 12 and the stator structure 3. The other end of the rotating shaft 9a is inserted into the bearing 6, and its corresponding end extends out of the bearing 6 and is threadedly connected to a locking nut 5. Further, in order to facilitate the adjustment of the air gap between the stator structure and the rotor structure, an adjusting shim 8 is sleeved on the rotating shaft 9a between the bearing 6 and the second limiting step 11, and the second limiting step 11 presses the adjusting shim 8 against the bearing 6.

[0044] In some embodiments, a cover plate 1 is mounted on the surface of the stator mounting portion 13 away from the second end cover 10.

[0045] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. A motor suitable for motorcycle sidemount mounting, comprising a housing, and a rotor structure and a stator structure disposed within the housing, characterized in that, The stator structure and rotor structure are arranged opposite each other along the axial direction; The rotor structure includes a rotating shaft rotatably inserted into the stator structure, on which a rotor support is mounted. The rotor support has an annular mounting groove on its side facing the stator structure. An annular rotor core is disposed in the mounting groove. An outer ring of the rotor core is engaged with the outer side wall of the mounting groove, and an inner ring of the rotor core is engaged with the inner side wall of the mounting groove. Multiple magnets are arranged circumferentially on the side of the rotor core facing the stator structure.

2. The motor for motorcycle side-mounted installation according to claim 1, characterized in that, The magnet is fan-shaped and there is a gap between adjacent magnets. A magnet pressure strip is installed in the gap. The length of the magnet pressure strip matches the mounting groove. The outer end and inner end of the magnet pressure strip abut against the corresponding side wall of the mounting groove. The outer end of the magnet pressure strip is connected to the outer ring of the rotor, and its inner end is connected to the inner ring of the rotor.

3. The motor for motorcycle side-mounted installation according to claim 2, characterized in that, Both sides of the magnet have protrusions, each protrusion including a longer first side and a shorter second side connected to each other, wherein the second side is connected to the side of the magnet facing the rotor core, and the first side is connected to the side of the magnet facing the stator structure. Both sides of the magnetic steel pressure strip have grooves that match the protrusions, and the protrusions are locked into the corresponding grooves.

4. The motor suitable for motorcycle side-mounted installation according to claim 2 or 3, characterized in that, The magnetic steel pressure strip is triangular in shape, and the corresponding gap matches the shape of the magnetic steel pressure strip. The small end of the magnetic steel pressure strip is far away from the rotating shaft, and its large end is close to the rotating shaft.

5. The motor for motorcycle side-mounted installation according to claim 4, characterized in that, Both the outer and inner rings of the rotor are made of non-metallic materials, and they are welded together at high temperature to be clamped between the rotor core and the side wall of the corresponding mounting slot.

6. The motor for motorcycle side-mounted installation according to claim 5, characterized in that, The magnetic steel pressure strip is made of non-metallic material. The magnetic steel pressure strip is melted by high-temperature welding to be clamped in the corresponding gap and fixedly connected to the outer ring and inner ring of the rotor.

7. The motor for motorcycle side mounting according to claim 6, characterized in that, The stator structure includes an annular stator core, which is fixedly installed inside the housing. The stator core has winding sections evenly arranged along its circumference, and each winding section is wound with a coil winding. Each coil winding is arranged axially and corresponds one-to-one with the plurality of magnets.

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