Hub motor

Abstract

The utility model relates to a wheel hub motor, which comprises a wheel hub, end covers, a rotating main shaft, connecting spokes, a stator and a rotor, the whole wheel hub is annular, the end covers are respectively fixed at openings at two sides of the wheel hub to form a closed cavity, and the connecting spokes, the stator and the rotor are arranged in the closed cavity; the rotating main shaft is arranged at the central axis of the end cover through a rotating bearing, the connecting spokes are arranged in the radial direction of the hub, one end of each connecting spoke is fixedly connected with the rotating main shaft, and the other end of each connecting spoke is fixedly connected with the stator; and the rotor is fixed on the inner side of the end cover, is positioned on the outer side of the stator and is arranged close to the stator. The motor is stable and reliable in working performance, and can meet the working requirements of large torque and high speed.

Description

Technical Field

[0001] The utility model relates to a hub motor. Background Art

[0002] With the continuous development of electric vehicle technology, wheel hub motors have been widely used in the field of electric vehicles as an efficient and energy-saving driving method. However, traditional wheel hub motors usually adopt a short stator structure with a limited number of winding coils, resulting in low motor power density and unable to meet the driving requirements of high loads and high speeds. In addition, the heat dissipation performance of traditional wheel hub motors is poor and they are easily affected by high temperatures, which affects the reliability and service life of the motors. Summary of the invention

[0003] The purpose of the utility model is to provide a hub motor, which has stable and reliable working performance and can meet the working requirements of large torque and high speed.

[0004] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0005] The utility model provides a hub motor, which comprises: a hub, an end cover, a rotating main shaft, connecting spokes, a stator and a rotor, wherein:

[0006] The hub is annular as a whole, and an end cover is fixed to the openings on both sides of the hub respectively, forming a closed cavity, and the connecting spokes, stator and rotor are arranged in the closed cavity;

[0007] The rotating main shaft is arranged at the central axis of the end cover through a rotating bearing, and a plurality of connecting spokes are arranged along the radial direction of the hub, one end of the connecting spoke is fixedly connected to the rotating main shaft, and the other end is fixedly connected to the stator;

[0008] The rotor is fixed on the inner side of the end cover, and the rotor is located on the outer side of the stator and is arranged close to the stator.

[0009] In a specific implementation, a plurality of stators are respectively arranged on each connecting spoke, and each of the stators includes a stator core and a winding coil, and the winding coil is wound on the stator core.

[0010] In a specific implementation, the stator core is made of a high magnetic permeability material to improve the efficiency of the motor.

[0011] In a specific implementation, the winding coil adopts a multi-layer winding structure to improve the power density of the motor.

[0012] In a specific embodiment, the multi-layer winding structure includes a plurality of coil layers, each coil layer includes a plurality of coils, and the coil layers are separated by insulating materials.

[0013] In a specific implementation, a plurality of coils are connected in parallel or in series to increase the voltage or current level of the motor.

[0014] In a specific implementation, the rotor is made of permanent magnet material to improve the torque output of the motor.

[0015] In a specific implementation manner, the permanent magnet material is a rare earth permanent magnet material or a ferrite permanent magnet material.

[0016] Due to the application of the above technical solution, the utility model has the following advantages compared with the prior art:

[0017] The hub motor of the utility model adopts a stator connected with spokes, and combined with the structural design of the rotor inside the hub, it can not only improve the power density of the motor, but also improve the overall heat dissipation performance, so that the working reliability of the motor is improved, and the torque is large, so that the starting speed is fast and the climbing speed is faster. In addition, the hub motor of the present application adopts an integral hub, without carbon brushes, gears and other loss parts, which effectively reduces the cost of motor equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Hereinafter, some specific embodiments of the present invention will be described in detail in an exemplary and non-limiting manner with reference to the accompanying drawings. The same reference numerals in the accompanying drawings indicate the same or similar components or parts. It should be understood by those skilled in the art that these drawings are not necessarily drawn to scale. In the accompanying drawings:

[0019] Figure 1 It is a schematic cross-sectional structure diagram of a hub motor according to an embodiment of the utility model.

[0020] The reference numerals are described as follows:

[0021] 1. Wheel hub, 2. End cover, 3. Rotating main shaft, 4. Connecting spokes, 5. Stator, 6. Rotor. DETAILED DESCRIPTION

[0022] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention.

[0024] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0025] This embodiment provides a hub motor, such as Figure 1 As shown, it comprises: a hub 1, an end cover 2, a rotating main shaft 3, connecting spokes 4, a stator 5 and a rotor 6, wherein:

[0026] The wheel hub 1 is annular as a whole, the outer side of the wheel hub 1 is a rim for fixing a tire, and a plurality of the rotors 6 are continuously arranged on the inner side. An end cover 2 is fixed to the openings on the left and right sides of the wheel hub 1, respectively, to form a closed cavity, and the connecting spokes 4, the stator 5 and the rotor 6 are arranged in the closed cavity;

[0027] The end cover 2 is circular in shape as a whole, and its edge is bent toward the hub 1 in the middle and fixed to the hub 1 (it can be fixed by welding or screws, etc.), the rotating main shaft 3 is arranged at the central axis of the end cover 2 through a rotating bearing, and a plurality of connecting spokes 4 are arranged along the radial direction of the hub 1, one end of the connecting spoke 4 is fixedly connected to the rotating main shaft 3, and the other end is fixedly connected to the stator 5;

[0028] The rotor 6 is fixed on the inner side of the end cover 2 , and the rotor 6 is located on the outer side of the stator 5 and is disposed close to the stator 5 .

[0029] In a specific implementation, a plurality of stators 5 are respectively disposed on each connecting spoke 4 , and each of the stators 5 includes a stator 5 core and a winding coil, and the winding coil is wound on the stator 5 core.

[0030] In a specific implementation, the core of the stator 5 is made of a high magnetic permeability material to improve the efficiency of the motor.

[0031] In a specific implementation, the winding coil adopts a multi-layer winding structure to improve the power density of the motor.

[0032] In a specific embodiment, the multi-layer winding structure includes a plurality of coil layers, each coil layer includes a plurality of coils, and the coil layers are separated by insulating materials.

[0033] In a specific implementation, a plurality of coils are connected in parallel or in series to increase the voltage or current level of the motor.

[0034] In a specific implementation, the rotor 6 is made of permanent magnet material to improve the torque output of the motor.

[0035] In a specific implementation manner, the permanent magnet material is a rare earth permanent magnet material or a ferrite permanent magnet material.

[0036] The hub motor of the utility model adopts a structure design that connects the spokes 4 to set the stator 5, and then combines the rotor 6 inside the hub 1, which can not only improve the power density of the motor, but also improve the overall heat dissipation performance, so that the working reliability of the motor is improved, and the torque is large, so that the starting speed is fast and the climbing speed is faster. In addition, the hub motor of the present application adopts an integral hub 1, without carbon brushes, gears and other loss parts, effectively reducing the cost of motor equipment.

[0037] The above embodiments are only for illustrating the technical concept and features of the utility model, and their purpose is to enable people familiar with this technology to understand the content of the utility model and implement it accordingly. They cannot be used to limit the protection scope of the utility model. All equivalent changes or modifications made according to the spirit of the utility model should be included in the protection scope of the utility model.

Claims

1. A hub motor, characterized in that: include: Hub, end caps, rotating spindle, connecting spokes, stator and rotor, wherein: The hub is annular as a whole, and an end cover is fixed to the openings on both sides of the hub respectively, forming a closed cavity, and the connecting spokes, stator and rotor are arranged in the closed cavity; The rotating main shaft is arranged at the central axis of the end cover through a rotating bearing, and a plurality of connecting spokes are arranged along the radial direction of the hub, one end of the connecting spoke is fixedly connected to the rotating main shaft, and the other end is fixedly connected to the stator, and a plurality of stators are arranged on each connecting spoke, each of the stators includes a stator core and a winding coil, and the winding coil is wound on the stator core; The rotor is fixed on the inner side of the end cover, and the rotor is located on the outer side of the stator and is arranged close to the stator.

2. The wheel hub motor according to claim 1, characterized in that: The stator core is made of high magnetic permeability material to improve the efficiency of the motor.

3. The wheel hub motor according to claim 1, characterized in that: The winding coil adopts a multi-layer winding structure to improve the power density of the motor.

4. The wheel hub motor according to claim 3, characterized in that: The multi-layer winding structure includes a plurality of coil layers, each coil layer includes a plurality of coils, and the coil layers are separated by insulating materials.

5. The wheel hub motor according to claim 4, characterized in that: Multiple coils are connected in parallel or series to increase the voltage or current level of the motor.

6. The wheel hub motor according to claim 1, characterized in that: The rotor is made of permanent magnet material to improve the torque output of the motor.

7. The wheel hub motor according to claim 6, characterized in that: The permanent magnet material is rare earth permanent magnet material or ferrite permanent magnet material.

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