Hub motor, wheel and vehicle

Abstract

The utility model relates to the technical field of motors, and provides a hub motor, a wheel and a vehicle, the hub motor comprises a motor housing, a motor mechanism and a speed reducing mechanism; the motor shell is provided with a first accommodating cavity, a second accommodating cavity communicated with the first accommodating cavity and an opening end, and the second accommodating cavity is communicated with the outside through the opening end; the motor mechanism is arranged in the first accommodating cavity; the speed reducing mechanism is arranged in the second containing cavity, one end of the speed reducing mechanism is connected with the output end of the motor mechanism, and the other end, away from the motor mechanism, of the speed reducing mechanism is connected to the rim through the open end. According to the hub motor provided by the utility model, the rim of the wheel is used as the motor cover of the hub motor, and in the hub motor with the same structural layout, the thickness of one motor cover can be reduced in the thickness direction, so that the overall thickness of the hub motor is thinner, the overall size is relatively smaller, and the hub motor is suitable for miniaturization development.

Description

Technical Field

[0001] The utility model relates to the technical field of motors, and in particular provides a hub motor, a wheel and a vehicle. Background Art

[0002] A hub motor is an electric drive device integrated inside the vehicle's wheel hub. Compared with the traditional car layout, the hub motor integrates components such as the electric motor, reducer and brake into the wheel hub, realizing the function of directly driving the wheel.

[0003] This type of wheel hub motor has the following advantages: it can provide higher power density; it has high driving efficiency and reduces energy waste; it can achieve precise power distribution and dynamic vector control, and improve the vehicle's handling and stability.

[0004] However, after adding a reducer, the overall size of the current hub motor is relatively large, which is not conducive to miniaturization design. Utility Model Content

[0005] The utility model aims to provide a hub motor, a wheel and a vehicle, aiming to solve the problem of the existing hub motor having a large overall volume.

[0006] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0007] In a first aspect, the present application provides a hub motor for connecting to a rim of a wheel, the hub motor comprising:

[0008] A motor housing, wherein the motor housing comprises a first accommodating cavity, a second accommodating cavity communicating with the first accommodating cavity, and an open end, wherein the second accommodating cavity is communicated with the outside through the open end;

[0009] A motor mechanism, wherein the motor mechanism is disposed in the first accommodating cavity;

[0010] A speed reduction mechanism is disposed in the second accommodating cavity, one end of the speed reduction mechanism is connected to the output end of the motor mechanism, and the other end of the speed reduction mechanism away from the motor mechanism is connected to the rim through the opening end.

[0011] Beneficial effects of the utility model: The hub motor provided by the utility model is connected to the rim of the wheel. Specifically, a first accommodating cavity and a second accommodating cavity that are interconnected are formed in the motor housing, and the second accommodating cavity is connected to the outside through an open end. The motor mechanism is arranged in the first accommodating cavity, the reduction mechanism is arranged in the second accommodating cavity, and the end of the reduction mechanism away from the motor mechanism is connected to the rim of the wheel through the open end. In this way, the rim of the wheel is used as the motor cover of the hub motor. In the hub motor with the same structural layout, the thickness of a motor cover can be reduced in its thickness direction. Then, the overall thickness of the hub motor is thinner and the overall volume is relatively smaller, which is suitable for miniaturization.

[0012] In some embodiments, the motor housing includes a main body and a mounting portion formed by protruding outward from the end of the main body, the main body has the first accommodating cavity, the mounting portion has the second accommodating cavity, and the opening end is formed on the mounting portion.

[0013] By adopting the above technical solution, the motor housing is divided into a main body and an installation part, wherein the main body has a first accommodating cavity and the installation part has a second accommodating cavity. In this way, the motor mechanism is arranged in the main body and the reduction mechanism is arranged in the installation part.

[0014] In some embodiments, the motor mechanism includes a stator structure disposed on an inner wall of the main body and a rotor structure that rotates coaxially relative to the stator structure.

[0015] By adopting the above technical solution, the stator structure and the rotor structure are arranged to rotate coaxially in concentric circles, and the stator structure drives the rotor structure to rotate around the axis. In this way, the overall thickness of the motor mechanism can be reduced, and the overall thickness of the hub motor can be further reduced.

[0016] In some embodiments, the reduction mechanism includes a sun gear and a planet carrier matched with the sun gear, the sun gear is connected to the rotor structure, and the planet carrier corresponds to the open end and is connected to the rim.

[0017] By adopting the above technical solution, the reduction mechanism consists of a sun gear and a planet carrier. The sun gear rotates around the axis with the rotor structure. The sun gear is decelerated by the planet carrier. In addition, the planet carrier transmits the decelerated torque to the rim and drives the rim to rotate around the axis.

[0018] In some embodiments, the hub motor further includes a shielding cover, which is disposed on one side of the rotor structure, and the shielding cover is used to shield current interference of the stator structure.

[0019] By adopting the above technical solution, one side of the rotor structure is connected to the reduction mechanism, and a shielding cover is provided on the other side of the rotor structure, thereby dividing the first accommodating cavity into two sub-spaces, one of which is used to accommodate the rotor structure, and the other is a wiring space, that is, the wires used to electrically connect to the stator structure can be accommodated in the sub-space to perform the corresponding shielding function.

[0020] In some embodiments, the hub motor further includes a rotary transformer, and the rotary transformer is disposed on a side of the shielding cover facing the rotor structure.

[0021] By adopting the above technical solution, the rotary transformer is arranged on one side of the rotor structure and separated by the shielding cover, that is, the wire used to supply power to the given substructure and the rotary transformer are respectively located on opposite sides of the shielding cover to reduce interference with the electrical signal of the rotary transformer.

[0022] In some embodiments, the hub motor further includes a motor shaft, the reduction mechanism is rotatably connected to the motor shaft, and the motor shaft is a hollow structure and is used for wiring.

[0023] By adopting the above technical solution, the motor shaft is used to connect with the body of the vehicle, and the motor shaft with a hollow structure is convenient for the routing of wires, so as to reduce the space occupied by the wires and further reduce the overall volume of the hub motor.

[0024] In some embodiments, the line passes through the motor shaft and is arranged on a side of the shielding cover away from the rotor structure.

[0025] By adopting the above technical solution, the distance from the line to the magnet part of the rotor structure is relatively far, which can reduce the electromagnetic interference to the rotor structure and prevent the line from rubbing against the rotor structure.

[0026] In some embodiments, the motor housing includes an end cover disposed on an end of the main body away from the mounting portion, the hub motor includes an anti-rotation structure, the end of the motor shaft is passed through the end cover, and the anti-rotation structure is screwedly connected to the motor shaft and abuts against the end cover.

[0027] By adopting the above technical solution, the end cover is fixed on the motor shaft through the anti-rotation structure, so that during the driving of the vehicle, the end cover does not rotate relatively with the rim of the wheel.

[0028] In a second aspect, the present application also provides a wheel, comprising the above-mentioned hub motor.

[0029] In a third aspect, the present application also provides a vehicle, comprising the wheel described above.

[0030] It can be understood that the beneficial effects of the second and third aspects mentioned above can be found in the relevant description of the first aspect mentioned above, and will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0032] Figure 1 A cross-sectional view of a wheel provided in an embodiment of the utility model;

[0033] Figure 2 An exploded view of a hub motor provided in an embodiment of the utility model;

[0034] Figure 3 An exploded view of the reduction mechanism of the hub motor provided in an embodiment of the utility model.

[0035] Among them, the reference numerals in the figure are:

[0036] 100. Hub motor;

[0037] 10. Motor housing; 10a. First accommodating cavity; 10b. Second accommodating cavity; 10c. Open end; 11. Main body; 12. Mounting portion;

[0038] 20. Motor mechanism; 21. Stator structure; 22. Rotor structure;

[0039] 30. Speed ​​reduction mechanism; 31. Sun gear; 32. Planet carrier; 311. Sun connecting part; 312. Sun gear part; 321. Planetary gear; 322. Fixed plate; 323. Ring gear;

[0040] 40. Shielding cover;

[0041] 50. Rotary transformer;

[0042] 61. Motor shaft; 62. Circuit;

[0043] 71. End cover; 72. Anti-rotation structure;

[0044] 1000. Wheel; 200. Rim. DETAILED DESCRIPTION

[0045] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0046] In the description of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and 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 orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0047] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0048] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0049] Please refer to Figure 1 The present application provides a hub motor 100 for connecting to a rim 200 of a wheel 1000 . The hub motor 100 includes a motor housing 10 , a motor mechanism 20 and a reduction mechanism 30 .

[0050] The motor housing 10 has a first accommodating cavity 10a, a second accommodating cavity 10b communicating with the first accommodating cavity 10a, and an open end 10c, wherein the second accommodating cavity 10b is communicated with the outside through the open end 10c;

[0051] The motor mechanism 20 is disposed in the first accommodating cavity 10a;

[0052] The speed reduction mechanism 30 is disposed in the second accommodating cavity 10 b , one end of the speed reduction mechanism 30 is connected to the output end of the motor mechanism 20 , and the other end of the speed reduction mechanism 30 away from the motor mechanism 20 is connected to the rim 200 through the open end 10 c .

[0053] It can be understood that the motor housing 10 is the shell in which the power supply mechanism 20 and the reduction mechanism 30 are set. At the same time, the motor housing 10 is also the external structure of the hub motor 100 and is the main structural part that reflects its overall volume. Therefore, it is particularly important to reasonably arrange the motor mechanism 20 and the reduction mechanism 30 in the motor housing 10.

[0054] Specifically, the motor housing 10 has a first accommodating cavity 10a and a second accommodating cavity 10b which are connected, and the second accommodating cavity 10b is connected to the outside through an open end 10c. In this way, in the thickness direction of the motor housing 10, the motor mechanism 20 is arranged in the first accommodating cavity 10a, and the reduction mechanism 30 is arranged in the second accommodating cavity 10b, and the end of the reduction mechanism 30 away from the motor mechanism 20 is connected to the rim 200 of the wheel 1000 through the open end 10c. In this way, the rim 200 of the wheel 1000 is used as the motor cover of the hub motor 100, and the size of the motor housing 10 in the thickness direction will be further reduced, and the installation process will also be simpler.

[0055] The hub motor 100 provided by the utility model is connected to the rim 200 of the wheel 1000. Specifically, a first accommodating cavity 10a and a second accommodating cavity 10b are formed in the motor housing 10, and the second accommodating cavity 10b is connected to the outside through an open end 10c. The motor mechanism 20 is arranged in the first accommodating cavity 10a, and the reduction mechanism 30 is arranged in the second accommodating cavity 10b, and the end of the reduction mechanism 30 away from the motor mechanism 20 is connected to the rim 200 of the wheel 1000 through the open end 10c. In this way, the rim 200 of the wheel 1000 is used as the motor cover of the hub motor 100. In the hub motor 100 with the same structural layout, the thickness of one motor cover can be reduced in its thickness direction. Then, the overall thickness of the hub motor 100 is thinner, and the overall volume is relatively smaller, which is suitable for miniaturization.

[0056] In one embodiment, in the radial direction of the motor housing 10 , there is at least a partial overlapping space between the first accommodating cavity 10 a and the second accommodating cavity 10 b .

[0057] It can be understood that the motor mechanism 20 and the reduction mechanism 30 are both rotary structures, and the motor housing 10 for accommodating the motor mechanism 20 and the reduction mechanism 30 is generally a cylindrical structure, so the motor housing 10 has a radial direction.

[0058] At the same time, in order to further reduce the thickness of the motor housing 10, the first accommodating cavity 10a and the second accommodating cavity 10b have at least partial overlapping space in the radial direction of the motor housing 10. Then, in terms of spatial distribution, the reduction mechanism 30 can extend part of the mechanism into the first accommodating cavity 10a. Then, in the thickness direction of the motor housing 10, the size of the motor housing 10 is further compressed, so that the overall thickness of the hub motor 100 is thinner.

[0059] Please refer to Figure 1 In some embodiments, the motor housing 10 includes a main body 11 and a mounting portion 12 formed by protruding outward from the end of the main body 11, the main body 11 has a first accommodating cavity 10a, the mounting portion 12 has a second accommodating cavity 10b, and an open end 10c is formed on the mounting portion 12.

[0060] It can be understood that the main body 11 is a body of revolution structure, and the main body 11 has two ends arranged opposite to each other, one of which protrudes outward to form a mounting portion 12. Similarly, the mounting portion 12 is also a body of revolution structure. In this way, the space enclosed by the main body 11 is the first accommodating cavity 10a, and the space enclosed by the mounting portion 12 is the second accommodating cavity 10b.

[0061] The open end 10 c is formed on the end of the mounting portion 12 away from the main body 11 , that is, when connected to the rim 200 , the end of the mounting portion 12 away from the main body 11 is in contact with the rim 200 .

[0062] For example, the mounting portion 12 and the rim 200 may be mounted in a directly connected manner, that is, the mounting portion 12 forms mounting ears along its radial direction, the mounting ears abut against the rim 200, and then the mounting ears and the rim 200 are connected by screws.

[0063] Alternatively, the mounting portion 12 and the rim 200 are mounted in an indirect connection. Since the speed reduction mechanism 30 is disposed in the second accommodating cavity 10 b of the mounting portion 12 , the rim 200 and the speed reduction mechanism 30 can be connected by screws.

[0064] In this way, the motor housing 10 is divided into a main body 11 and an installation portion 12, wherein the main body 11 has a first accommodating cavity 10a, and the installation portion 12 has a second accommodating cavity 10b. In this way, the motor mechanism 20 is arranged in the main body 11, and the main body 11 provides stable support for the motor mechanism 20, and the reduction mechanism 30 is arranged in the installation portion 12, and the installation portion 12 provides stable support for the reduction mechanism 30.

[0065] Please refer to Figure 1 and Figure 2In some embodiments, the motor mechanism 20 includes a stator structure 21 disposed on the inner wall of the main body 11 and a rotor structure 22 coaxially rotating relative to the stator structure 21 .

[0066] It can be understood that the inner wall of the main body 11 refers to the circumferential inner wall of the main body 11 in the radial direction, and the stator structure 21 is fixedly connected to the circumferential inner wall of the main body 11 and remains relatively stationary with the main body 11 .

[0067] The rotor structure 22 is coaxially arranged concentrically with the stator structure 21, that is, the motor mechanism 20 is a radial motor mechanism 20, and the thickness of the radial motor mechanism 20 can be configured to be thinner, that is, the thickness space of the first accommodating cavity 10a of the main body 11 can be further compressed.

[0068] In this way, the stator structure 21 and the rotor structure 22 are arranged to rotate coaxially and concentrically, and the stator structure 21 drives the rotor structure 22 to rotate around the axis, so that the overall thickness of the motor mechanism 20 can be reduced, and the overall thickness of the hub motor 100 can be further reduced.

[0069] For example, the stator structure 21 includes a stator body and a plurality of winding components arranged on the stator body, and each winding component is circumferentially distributed at equal intervals with the central axis of the stator body as the center; the rotor structure 22 includes a rotor body and a plurality of permanent magnets arranged on the rotor body, and similarly, each permanent magnet is circumferentially distributed at equal intervals with the central axis of the rotor body as the center. At the same time, the stator body is surrounded by each permanent magnet, that is, the motor mechanism 20 is an inner rotor motor. When each winding component is turned on and off in sequence, each permanent magnet is driven to rotate around the central axis of the rotor body, and at the same time, the rotor body is driven to rotate around its own central axis.

[0070] When the rotor structure 22 is connected to the speed reduction mechanism 30 , the rotor body of the rotor structure 22 is connected to the speed reduction mechanism 30 to achieve the output of torque.

[0071] Please refer to Figure 1 and Figure 3 In some embodiments, the reduction mechanism 30 includes a sun gear 31 and a planet carrier 32 matched with the sun gear 31 , the sun gear 31 is connected to the rotor structure 22 , and the planet carrier 32 corresponds to the open end 10 c and is connected to the rim 200 .

[0072] It can be understood that the sun gear 31 is the input end of the reduction mechanism 30, and the planet carrier 32 is the output end of the reduction mechanism 30. The sun gear 31 rotates around the axis with the rotor structure 22, and at the same time, the sun gear 31 drives the planet carrier 32 to rotate around the axis, and finally, the torque output by the rotor structure 22 is transmitted to the rim 200.

[0073] In this way, the reduction mechanism 30 is composed of a sun gear 31 and a planet carrier 32. The sun gear 31 rotates around the axis with the rotor structure 22. The sun gear 31 is decelerated by the planet carrier 32. In addition, the planet carrier 32 transmits the decelerated torque to the rim 200 and drives the rim 200 to rotate around the axis.

[0074] For example, Figure 3 As shown, the sun gear 31 includes a sun connecting portion 311 and a sun gear portion 312 connected to the sun connecting portion 311 . The sun connecting portion 311 is used to be connected to the rotor structure 22 , and the sun gear portion 312 is used to be meshedly connected to the planet carrier 32 .

[0075] Here, the connection method between the sun connection part 311 and the rotor structure 22 can be: forming a mounting ear on the sun connection part 311, the mounting ear abuts against the rotor structure 22, and then connecting with the rotor structure 22 through fasteners such as screws and rivets.

[0076] Alternatively, the connection method between the sun connection part 311 and the rotor structure 22 can also be: a mounting groove is set on the rotor structure 22, and the sun connection part 311 is inserted into the mounting groove along the thickness direction of the hub motor 100, so that part of the reduction mechanism 30 extends into the first accommodating cavity 10a of the motor housing 10, that is, the volume space of the hub motor 100 in the thickness direction can be further compressed.

[0077] For example, Figure 3 As shown, the planet carrier 32 includes a plurality of planetary gears 321 meshing with the sun gear 31, a fixed plate 322 rotatably connected to each planetary gear 321, and a gear ring 323 disposed in the second accommodating cavity 10b, the gear ring 323 surrounds each planetary gear 321 and is meshingly connected to each planetary gear 321, and the end of the fixed plate 322 facing away from the planetary gear 321 is connected to the rim 200.

[0078] Here, the gear ring 323 and the fixed plate 322 are both accommodated in the second accommodating cavity 10b, and the end of the fixed plate 322 facing away from the planetary gear 321 is flush with the end of the motor housing 10 facing the rim 200. In this way, when the hub motor 100 is connected to the rim 200, the motor housing 10 and the fixed plate 322 of the reduction mechanism 30 are both in contact with the rim 200, making the installation between the hub motor 100 and the rim 200 more compact.

[0079] Please refer to Figure 1 and Figure 2 In some embodiments, the hub motor 100 further includes a shielding cover 40 , which is disposed on one side of the rotor structure 22 , and is used to shield current interference of the stator structure 21 .

[0080] It can be understood that each winding component of the stator structure 21 needs to be powered by external wires to form a corresponding magnetic field to drive the rotor structure 22 to rotate around the axis. Therefore, the wires in the first accommodating cavity 10a will form a corresponding magnetic field after being energized, thereby affecting the rotation of the rotor structure 22 around the axis, especially the wires arranged radially along the motor housing 10. In this way, it is necessary to separate such wires through a shielding cover 40 to reduce their impact on the rotor structure 22.

[0081] The material of the shielding cover 40 includes but is not limited to steel, aluminum, copper, nickel-copper alloy, cobalt-iron alloy, and carbon fiber.

[0082] The shielding cover 40 is similar to a disk-shaped structure and extends from the center of the rotor structure 22 to the edge of the rotor structure 22 to provide more comprehensive magnetic isolation protection for the rotor structure 22 .

[0083] Furthermore, in order to achieve a corresponding magnetic isolation effect, the shielding cover 40 is a disk-shaped structure with a complete structure, and no hole structure is provided thereon to prevent magnetic leakage, etc.

[0084] In this way, one side of the rotor structure 22 is connected to the reduction mechanism 30, and the other side of the rotor structure 22 is provided with a shielding cover 40, thereby dividing the first accommodating cavity 10a into two sub-spaces, one of which is used to accommodate the rotor structure 22, and the other is a wiring space, that is, the wires used to electrically connect to the stator structure 21 can be accommodated in the sub-space to perform the corresponding shielding function.

[0085] Optionally, the shielding cover 40 is fixedly connected to the inner wall of the stator structure 21 facing the rotor structure 22 to separate the stator structure 21 into two sub-spaces, and the sub-space away from the rotor structure 22 is used for routing external device wires.

[0086] Alternatively, the shielding cover 40 is fixed on the motor shaft of the hub motor 100. Similarly, the first accommodating cavity 10a can also be divided into two sub-spaces, and the external wire is accommodated in one of the sub-spaces.

[0087] Please refer to Figure 1 In some embodiments, the hub motor 100 further includes a rotary transformer 50 , which is disposed on a side of the shielding cover 40 facing the rotor structure 22 .

[0088] It can be understood that the rotary transformer 50 is used to increase or decrease the voltage, and to complete the corresponding signal conversion and detection. For example, the rotary transformer 50 can detect the rotation angle, speed and corresponding position of the rotational movement of the rotor structure 22 of the hub motor 100 around the axis, and convert it into an electrical signal for digital processing and control. In addition, the output terminal thereof outputs a voltage level that meets the requirements of the stator structure 21, and at the same time, it also plays a corresponding isolation role, that is, the power supply circuit is not directly electrically connected to the stator structure 21, so as to form corresponding circuit protection for the stator structure 21.

[0089] Similarly, in order to facilitate the collection and detection of the rotational motion parameters of the rotor structure 22 , the rotary transformer 50 may be disposed on a side of the shielding cover 40 facing the rotor structure 22 .

[0090] In this way, the rotary transformer 50 is arranged on one side of the rotor structure 22 and separated by the shielding cover 40, that is, the wire used to supply power to the given substructure 21 and the rotary transformer 50 are respectively located on opposite sides of the shielding cover 40 to reduce interference with the electrical signal of the rotary transformer 50.

[0091] In other embodiments, other electrical components that are susceptible to electromagnetic interference may be disposed on the side of the shielding cover 40 facing the rotor structure 22 .

[0092] Please refer to Figure 1 and Figure 2 In some embodiments, the hub motor 100 further includes a motor shaft 61 , and the reduction mechanism 30 is rotatably connected to the motor shaft 61 . The motor shaft 61 is a hollow structure and is used for wiring.

[0093] It can be understood that the motor shaft 61 is used to provide a rotatable connection between the rotor structure 22 of the motor mechanism 20 and the planetary carrier 32 of the reduction mechanism 30. Specifically, a first bearing is provided on the rotor body of the rotor structure 22, and a second bearing is provided on the planetary carrier 32. The first bearing and the second bearing are both sleeved on the motor shaft 61, and the motor shaft 61 is connected to the body of the vehicle to provide corresponding support and bearing functions.

[0094] Furthermore, the motor shaft 61 with a hollow structure can be used for routing external circuits. For example, the circuit for supplying power to the stator structure 21 of the motor mechanism 20 can enter the first accommodating cavity 10a of the motor housing 10 through the motor shaft 61, and be electrically connected to each winding assembly of the stator structure 21. In this way, the risk of external circuits being exposed and entangled can be reduced. At the same time, the use of internal routing can further reduce the overall volume of the hub motor 100, that is, the space occupied by the external circuits is the internal space of the motor shaft 61. In addition, the motor shaft 61 with a hollow setting has a greater bending strength than the shaft body of a solid structure, which can further improve the bearing performance of the motor shaft 61.

[0095] In this way, the motor shaft 61 is used to connect with the body of the vehicle, and the motor shaft 61 with a hollow structure is convenient for routing wires, so as to reduce the space occupied by the wires and further reduce the overall volume of the hub motor 100 .

[0096] Optionally, the motor shaft 61 passes through the reduction mechanism 30 and the motor mechanism 20 in sequence, and one end of the motor shaft 61 extends into the first accommodating cavity 10a, and the shielding cover 40 is arranged on the end of the motor shaft 61 to play a corresponding fixing role for the shielding cover 40.

[0097] In addition, in order to facilitate the routing of peripheral circuits, a plurality of notch structures are provided on the end of the motor shaft 61, and each notch structure is used to allow the peripheral circuits to be separated from the internal space of the motor shaft 61, thereby avoiding the problem of insufficient space caused by all the peripheral circuits being led out from the end of the motor shaft 61 and the possible squeezing or friction between the peripheral circuits. At the same time, it is also convenient for searching the peripheral circuits at a later time.

[0098] Furthermore, the hollow space of the motor shaft 61 can be integrated. For example, there is only one channel inside the motor shaft 61 for various peripheral circuits to pass through, that is, various peripheral circuits share one space. This space setting simplifies the processing process.

[0099] Alternatively, the hollow space of the motor shaft 61 is composed of a plurality of sub-channels. It is understandable that each or several peripheral circuits enter the same or several sub-channels, which can reduce the probability of friction between the peripheral circuits and facilitate circuit inspection.

[0100] Please refer to Figure 1 and Figure 2 In some embodiments, the line 62 passes through the motor shaft 61 and is arranged on a side of the shielding cover 40 facing away from the rotor structure 22 .

[0101] It can be understood that one end of the line 62 is connected to the control device and the power supply in the vehicle, and the other end is connected to each winding component of the stator structure 21 and the corresponding voltage stabilizing device.

[0102] Optionally, the circuit 62 is roughly divided into two parts, one part is accommodated in the motor shaft 61, and the other part is accommodated in the first accommodating cavity 10a and is located on the side of the shielding cover 40 away from the rotor structure 22. In this way, the impact of the circuit 62 on the rotor structure 22 after being energized is reduced, and the circuit 62 is prevented from rubbing against the rotor structure 22.

[0103] In this way, the distance between the line 62 and the magnet portion of the rotor structure 22 is relatively far, which can reduce the electromagnetic interference of the line 62 to the rotor structure 22 .

[0104] Please refer to Figure 1 and Figure 2In some embodiments, the motor housing 10 includes an end cover 71 that is covered on one end of the main body 11 away from the mounting portion 12, the hub motor 100 includes an anti-rotation structure 72, the end of the motor shaft 61 is passed through the end cover 71, and the anti-rotation structure 72 is screwed and connected to the motor shaft 61 and abuts against the end cover 71.

[0105] It can be understood that the end cover 71 is a structural component that is away from the vehicle body and faces outward, and when it is covered with the main body 11, a closed first accommodating cavity 10a is formed.

[0106] The anti-rotation structure 72 is used to limit the end cover 71 to reduce the probability of the end cover 71 moving or rotating relative to the motor shaft 61 .

[0107] For example, an external thread is provided on the portion of the motor shaft 61 that passes through the end cover 71 , and the anti-rotation structure 72 is a nut-like structure with an internal thread formed on its inner wall that meshes with the external thread, so that the end cover 71 is fastened to the end of the motor shaft 61 .

[0108] Alternatively, the anti-rotation structure 72 is a collar sleeved on the motor shaft 61 , and the collar and the motor shaft 61 are connected by friction fit, so that the end cover 71 can be limited.

[0109] In this way, the end cover 71 is fixed to the motor shaft 61 through the anti-rotation structure 72 , so that during the driving of the vehicle, the end cover 71 does not rotate relative to the rim 200 of the wheel 1000 .

[0110] In a second aspect, the present application also provides a wheel 1000 , comprising the above-mentioned hub motor 100 .

[0111] Specifically, Figure 1 As shown, the wheel 1000 also includes a rim 200, and the open end 10c of the motor housing 10 of the hub motor 100 abuts against the rim 200, that is, the rim 200 serves as a motor cover of the motor housing 10, so that the overall volume of the hub motor 100 is smaller and more suitable for miniaturization.

[0112] Furthermore, if Figure 1 As shown, the motor shaft 61 of the hub motor 100 is designed with a hollow structure, so that the line 62 used for power supply and electrical signal transmission in the vehicle can enter the internal space of the motor housing 10 through the motor shaft 61 to reduce the risk of exposure of the line 62 and further reduce the overall volume and space occupied by the hub motor 100.

[0113] In a third aspect, the present application also provides a vehicle, comprising the wheel 1000 described above.

[0114] It can be understood that the beneficial effects of the second and third aspects mentioned above can be found in the relevant description of the first aspect mentioned above, and will not be repeated here.

[0115] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A hub motor, used to connect to the rim of a wheel, characterized in that: include: A motor housing, wherein the motor housing comprises a first accommodating cavity, a second accommodating cavity communicating with the first accommodating cavity, and an open end, wherein the second accommodating cavity is communicated with the outside through the open end; A motor mechanism, wherein the motor mechanism is disposed in the first accommodating cavity; A speed reduction mechanism is disposed in the second accommodating cavity, one end of the speed reduction mechanism is connected to the output end of the motor mechanism, and the other end of the speed reduction mechanism away from the motor mechanism is connected to the rim through the opening end.

2. The hub motor according to claim 1, characterized in that: The motor housing includes a main body and a mounting portion formed by an end portion of the main body protruding outward, the main body has the first accommodating cavity, the mounting portion has the second accommodating cavity, and the mounting portion is formed with the opening end.

3. The hub motor according to claim 2, characterized in that: The motor mechanism comprises a stator structure arranged on the inner wall of the main body and a rotor structure coaxially rotating relative to the stator structure.

4. The hub motor according to claim 3, characterized in that: The speed reduction mechanism comprises a sun gear and a planet carrier matched with the sun gear, the sun gear is connected to the rotor structure, and the planet carrier corresponds to the open end and is connected to the rim.

5. The wheel hub motor according to claim 3 or 4, characterized in that: The hub motor further comprises a shielding cover, which is arranged on one side of the rotor structure and is used for shielding current interference of the stator structure.

6. The wheel hub motor according to claim 5, characterized in that: The hub motor further comprises a rotary transformer, and the rotary transformer is arranged on a side of the shielding cover facing the rotor structure.

7. The hub motor according to claim 5, characterized in that: The hub motor also includes a motor shaft, the reduction mechanism is rotatably connected to the motor shaft, and the motor shaft is a hollow structure and is used for wiring.

8. The hub motor according to claim 7, characterized in that: The circuit passes through the motor shaft and is arranged on a side of the shielding cover away from the rotor structure.

9. The hub motor according to claim 7, characterized in that: The motor housing includes an end cover which is arranged on an end of the main body away from the mounting portion, the hub motor includes an anti-rotation structure, the end of the motor shaft is passed through the end cover, and the anti-rotation structure is screwed to the motor shaft and abuts against the end cover.

10. A wheel, characterized in that: It comprises the hub motor as claimed in any one of claims 1 to 9.

11. A vehicle, characterized in that: Comprising the wheel as claimed in claim 10.

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