Wheel and electric automobile

Abstract

The utility model relates to the technical field of automobiles, and provides a wheel and an electric automobile, the wheel comprises a hub, a hub motor, a planetary reduction mechanism and a mandrel, the hub comprises a rim and a spoke, and the hub motor and the planetary reduction mechanism are both located on the same side of the spoke; the hub motor comprises a motor shell, a motor stator and a rotor assembly, the motor stator is fixed in the motor shell, and the radial outer end of the rotor assembly corresponds to the motor stator; the planetary reducing mechanism comprises a planet carrier and a sun gear, the radial inner end of the rotor assembly is fixedly connected with the sun gear, and the planet carrier is fixedly connected with the spoke; the mandrel is fixed on a vehicle body, the motor shell is fixed on the mandrel, and the planet carrier, the sun gear and the rotor assembly are all rotationally installed on the mandrel. The acting force borne by the hub in the wheel is transmitted to the central spindle through the planetary speed reducing mechanism and then transmitted to a vehicle body through the central spindle, and the problem that a shell of a hub motor is prone to deformation is solved.

Description

Technical Field

[0001] This application relates to the technical field of automobiles, and particularly relates to a wheel and an electric vehicle. Background Art

[0002] The wheels of electric vehicles generally include a wheel hub, a hub motor, a reduction mechanism, and a braking mechanism installed inside the wheel hub. When the electric vehicle starts, the hub motor drives the wheel hub to rotate through the reduction mechanism to realize the rotation of the wheel, and further realize the driving of the electric vehicle; when the electric vehicle needs to stop, the braking mechanism is used to brake the wheel hub to realize the braking of the wheel, and further realize braking.

[0003] Generally, the wheel hub includes a rim and spokes. The rim and the spokes enclose a placement cavity. The hub motor, the reduction mechanism, and the braking mechanism are located inside the placement cavity and on the same side of the spokes, so as to facilitate the disassembly of the wheel hub. However, in the above solution, the outer shell of the hub motor is connected to the vehicle body, and the force received by the wheel hub is transmitted to the vehicle body through the outer shell of the hub motor, which easily causes the outer shell of the hub motor to deform, and further affects the normal operation of the hub motor. Utility Model Content

[0004] In view of this, the embodiments of this application provide a wheel and an electric vehicle to solve the problem that the outer shell of the hub motor is prone to deformation.

[0005] A first aspect of this application proposes a wheel, including a wheel hub, a hub motor, a planetary reduction mechanism, and a core shaft. The wheel hub includes a rim and spokes. The rim and the spokes enclose a placement cavity. The hub motor and the planetary reduction mechanism are both located inside the placement cavity and on the same side of the spokes; the hub motor includes a motor housing, a motor stator, and a rotor assembly. The motor stator is fixed inside the motor housing, and the radially outer end of the rotor assembly is arranged corresponding to the motor stator; the planetary reduction mechanism includes a planet carrier and a sun gear. The radially inner end of the rotor assembly is fixedly connected to the sun gear, and the planet carrier is fixedly connected to the spokes; the core shaft is fixed to the vehicle body, the motor housing is fixed to the core shaft, and the planet carrier, the sun gear, and the rotor assembly are all rotatably installed on the core shaft.

[0006] The beneficial effects of the wheel provided by the embodiments of this application: Since both the hub motor and the planetary reduction mechanism are located inside the placement cavity and on the same side of the spokes, when disassembling the wheel hub, it is not necessary to first remove the hub motor and the planetary reduction mechanism, making the disassembly of the wheel hub relatively simple. Moreover, since the planet carrier, the sun gear, and the rotor assembly are all rotatably installed on the core shaft, and the core shaft is fixed to the vehicle body, the force received by the wheel hub is transmitted to the core shaft through the planetary reduction mechanism, and then transmitted to the vehicle body through the core shaft, avoiding the deformation of the motor housing of the hub motor due to force and ensuring the normal operation of the hub motor.

[0007] In some embodiments, the wheel further includes a first bearing disposed between the sun gear and the core shaft, and the rotor assembly is rotatably mounted on the core shaft through the sun gear; alternatively, the wheel further includes a second bearing disposed between the rotor assembly and the core shaft, and the sun gear is rotatably mounted on the core shaft through the rotor assembly.

[0008] In some embodiments, the motor housing has a mounting groove with an opening facing the spoke, and the planetary reduction mechanism is located in the mounting groove.

[0009] In some embodiments, in the radial direction of the planet carrier, the wheel further includes a third bearing disposed between the planet carrier and the motor housing, and / or the wheel further includes a fourth bearing disposed between the planet carrier and the core shaft.

[0010] In some embodiments, the wheel further includes a rotary encoder, which includes an encoder stator, a stator seat, an encoder rotor, and a rotor seat. The encoder stator is fixed on the stator seat, the stator seat is fixed on the core shaft, the encoder rotor is fixed on the rotor seat, and the rotor seat is fixed on the planet carrier or the spoke.

[0011] In some embodiments, the core shaft has a wire threading hole, and the rotary encoder further includes a lead wire connected to the encoder stator, and the lead wire passes through the wire threading hole to connect to an external device.

[0012] In some embodiments, the core shaft includes a shaft body and a connecting flange, the connecting flange is disposed at one end of the shaft body away from the spoke, and the motor housing is fixed on the connecting flange.

[0013] In some embodiments, the wheel further includes a braking mechanism in the placement cavity. The braking mechanism includes a brake caliper and a brake disc. The brake disc is an annular disc, the brake disc is fixed on the rim, and the jaws of the brake caliper face away from the center line of the rim.

[0014] In some embodiments, the brake caliper is fixed on the motor housing or the core shaft.

[0015] A second aspect of the present application proposes an electric vehicle, which includes the wheel as described in the first aspect.

[0016] This electric vehicle adopts any one or more embodiments of the above-mentioned wheel, and thus has the beneficial effects of the above embodiments, which will not be elaborated here one by one.

[0017] The above description is only an overview of the technical solution of this application. In order to understand the technical means of this application more clearly, it can be implemented according to the content of the specification. And in order to make the above and other purposes, features and advantages of this application more obvious and understandable, the specific embodiments of this application are specifically given below. Brief Description of the Drawings

[0018] In order to more clearly illustrate the technical solutions in the embodiments of this application, the following will briefly introduce the drawings required for use in the embodiments or the description of conventional technologies. Obviously, the drawings in the following description are only some embodiments of this application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0019] Figure 1 is a schematic structural diagram of a wheel provided by some embodiments of this application;

[0020] Figure 2 is Figure 1 a schematic structural diagram of the wheel shown after removing the hub and the tire;

[0021] Figure 3 is Figure 1 a sectional view taken along the A-A direction of the wheel shown;

[0022] Figure 4 is Figure 3 an enlarged view of part B in ;

[0023] Figure 5 is Figure 3 an enlarged view of part C in ;

[0024] Figure 6 is Figure 3 a schematic structural diagram of the braking mechanism in.

[0025] The meanings of the marks in the figure are as follows:

[0026] 100, wheel;

[0027] 10, hub; 11, rim; 111, fixing protrusion; 12, spoke; 13, placement cavity;

[0028] 20, in-wheel motor; 21, motor housing; 211, third bearing; 212, mounting groove; 22, motor stator; 23, rotor assembly; 231, motor rotor; 232, rotor bracket;

[0029] 30, planetary reduction mechanism; 31, planet carrier; 311, first fixing hole; 312, second fixing hole; 313, fourth bearing; 32, sun gear; 321, first bearing; 33, planet gear; 34, internal gear ring;

[0030] 40. Mandrel; 41. Shaft body; 411. Threading hole; 42. Connecting flange; 421. Third fixing hole;

[0031] 50. Rotary encoder; 51. Stator seat; 52. Encoder stator; 53. Rotor seat; 54. Encoder rotor; 55. Lead wire;

[0032] 60. Brake mechanism; 61. Brake disc; 611. Ring plate; 612. Connecting plate; 62. Brake caliper; 621. Jaw; 622. Connecting part.

[0033] 70. Tire. Detailed implementation mode

[0034] The embodiments of the technical solution of the present application will be described in detail below with reference to the drawings. The following embodiments are only used to illustrate the technical solution of the present application more clearly, so they are only examples and cannot be used to limit the protection scope of the present application.

[0035] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above drawings are intended to cover non-exclusive inclusion.

[0036] In the description of the embodiments of this application, technical terms such as "first" and "second" are only used to distinguish different objects and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity, specific order or primary-secondary relationship of the indicated technical features. In the description of the embodiments of this application, the meaning of "a plurality" is more than two, unless otherwise specifically defined.

[0037] Referring to "embodiment" herein means that a specific feature, structure or characteristic described in connection with the embodiment may be included in at least one embodiment of this application. The phrase appears in various places in the specification and does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art explicitly and implicitly understand that the embodiments described herein may be combined with other embodiments.

[0038] In the description of the embodiments of this application, the term "and / or" is only a description of the association relationship of associated objects, indicating that there can be three relationships, for example, A and / or B, which can represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this article generally represents an "or" relationship between the associated objects before and after.

[0039] In the description of the embodiments of the present application, the term "a plurality" means two or more (including two). Similarly, "a plurality of groups" means two or more groups (including two groups), and "a plurality of pieces" means two or more pieces (including two pieces).

[0040] In the description of the embodiments of the present application, the orientation or positional relationship indicated by technical terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the embodiments of the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation on the embodiments of the present application.

[0041] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installation", "connection", "connection", "fixation", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can also be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific situations.

[0042] An embodiment of the first aspect of the present application provides a wheel. Please refer to Figures 1 to 4 , the wheel 100 includes a hub 10, a hub motor 20, a planetary reduction mechanism 30, and a core shaft 40. The hub 10 includes a rim 11 and a spoke 12. The rim 11 and the spoke 12 enclose a placement cavity 13. The hub motor 20 and the planetary reduction mechanism 30 are both located in the placement cavity 13 and on the same side of the spoke 12. The hub motor 20 includes a motor housing 21, a motor stator 22, and a rotor assembly 23. The motor stator 22 is fixed inside the motor housing 21, and the radially outer end of the rotor assembly 23 is arranged corresponding to the motor stator 22. The planetary reduction mechanism 30 includes a planet carrier 31 and a sun gear 32. The radially inner end of the rotor assembly 23 is fixedly connected to the sun gear 32, and the planet carrier 31 is fixedly connected to the spoke 12. The core shaft 40 is fixed to the vehicle body, the motor housing 21 is fixed to the core shaft 40, and the planet carrier 31, the sun gear 32, and the rotor assembly 23 are all rotatably mounted on the core shaft 40.

[0043] The rim 11 is of a cylindrical structure. The spoke 12 can be provided at one axial end of the rim 11, or the spoke 12 can be provided inside the rim 11 and close to one axial end of the rim 11, so that the rim 11 and the spoke 12 enclose the placement cavity 13. In this way, when the axial width of the rim 11 is certain, it can be ensured that the placement cavity 13 has a sufficiently large axial space to place the hub motor 20 and the planetary reduction mechanism 30.

[0044] Among them, the rim 11 is used to mount the tire 70, and the spoke 12 plays a role in connecting and supporting. It can be understood that the spoke 12 can be a disc-type spoke or a spoke-type spoke.

[0045] It can be understood that the rim 11 and the spoke 12 can be integrally formed; or, the rim 11 and the spoke 12 can be fixed together by welding, fastener connection, etc.

[0046] The in-wheel motor 20 and the planetary reduction mechanism 30 are both located in the placement cavity 13, and both are on the same side of the spoke 12. It can be understood that after the wheel 100 is installed on the vehicle body, the in-wheel motor 20 and the planetary reduction mechanism 30 are both inside the spoke 12. In this way, it is beneficial to the disassembly, installation and replacement of the hub 10. Among them, the inner side of the spoke 12 refers to the side of the spoke 12 facing the middle of the vehicle body.

[0047] The motor stator 22 is fixed in the motor housing 21, that is, the motor stator 22 is stationary relative to the motor housing 21. Among them, the motor stator 22 can be fixed on the inner wall surface of the motor housing 21 by welding, fastener connection, crimping, snap connection, interference connection, glue injection, etc.

[0048] The radially outer end of the rotor assembly 23 is arranged corresponding to the motor stator 22. It can be understood that the radially outer end of the rotor assembly 23 is inside the motor housing 21, and the rotor assembly 23 does not contact the motor housing 21. After the motor stator 22 is powered on, the rotor assembly 23 can rotate relative to the motor housing 21 and the motor stator 22. Among them, the radially outer end of the rotor assembly 23 refers to the outer end of the rotor assembly 23 in the radial direction of the in-wheel motor 20.

[0049] The radially inner end of the rotor assembly 23 is fixedly connected to the sun gear 32, and the planet carrier 31 is fixedly connected to the spoke 12, that is, the rotor assembly 23 is connected to the spoke 12 through the planetary reduction mechanism 30; in this way, when the rotor assembly 23 rotates, the hub 10 can be driven to rotate through the planetary reduction mechanism 30 to reduce the speed and increase the output torque. Among them, the radially inner end of the rotor assembly 23 refers to the inner end of the rotor assembly 23 in the radial direction of the in-wheel motor 20.

[0050] Exemplarily, the rotor assembly 23 includes a rotor bracket 232 and a motor rotor 231 mounted on the radially outer end of the rotor bracket 232, and the motor rotor 231 is arranged corresponding to the motor stator 22. It can be understood that the radially outer end of the rotor bracket 232 corresponds to the radially outer end of the rotor assembly 23, and the radially inner end of the rotor bracket 232 corresponds to the radially inner end of the rotor assembly 23.

[0051] Optionally, a plurality of first fixing holes 312 are provided on the planet carrier 31. The plurality of first fixing holes 312 are arranged at intervals along the circumferential direction of the planet carrier 31. The spoke 12 is fixedly connected to the planet carrier 31 through the cooperation of the plurality of first fixing holes 312 and a plurality of first fixing screws.

[0052] The mandrel 40 is fixed to the vehicle body, and the motor housing 21 is fixed to the mandrel 40. It can be understood that the motor housing 21 is fixed to the vehicle body through the mandrel 40, that is, the motor housing 21 is not directly connected to the vehicle body.

[0053] Optionally, a plurality of third fixing holes 421 are provided on the mandrel 40. The plurality of third fixing holes 421 are arranged at intervals along the circumferential direction of the mandrel 40. The mandrel 40 is fixed to the vehicle body through the cooperation of the plurality of third fixing holes 421 and a plurality of third fixing screws. For example, it is fixed to the suspension of the vehicle body.

[0054] The planet carrier 31, the sun gear 32, and the rotor assembly 23 are all rotatably mounted on the mandrel 40. It can be understood that both the planetary reduction mechanism 30 and the rotor assembly 23 are supported by the mandrel 40, and the hub 10 is only fixedly connected to the planet carrier 31 of the planetary reduction mechanism 30 through the spoke 12. Therefore, the force received by the hub 10 will be transmitted to the mandrel 40 through the planetary reduction mechanism 30, and then transmitted to the vehicle body through the mandrel 40.

[0055] The beneficial effects of the wheel 100 provided by the embodiment of the present application: Since both the in-wheel motor 20 and the planetary reduction mechanism 30 are located in the placement cavity 13 and on the same side of the spoke 12, when disassembling the hub 10, it is not necessary to first remove the in-wheel motor 20 and the planetary reduction mechanism 30, making the disassembly of the hub 10 relatively simple. Moreover, since the planet carrier 31, the sun gear 32, and the rotor assembly 23 are all rotatably mounted on the mandrel 40, and the mandrel 40 is fixed to the vehicle body, the force received by the hub 10 is transmitted to the mandrel 40 through the planetary reduction mechanism 30, and then transmitted to the vehicle body through the mandrel 40, avoiding deformation of the motor housing 21 of the in-wheel motor 20 due to force and ensuring the normal operation of the in-wheel motor 20.

[0056] In addition, the in-wheel motor 20 is an inner rotor structure, that is, the rotor assembly 23 is located radially inside the motor stator 22, and the heat dissipation is better.

[0057] Please also refer to Figure 3 and Figure 4 , in some embodiments, the wheel 100 further includes a first bearing 321 provided between the sun gear 32 and the mandrel 40. The rotor assembly 23 is rotatably mounted on the mandrel 40 through the sun gear 32.

[0058] A first bearing 321 is provided between the sun gear 32 and the core shaft 40, that is, the sun gear 32 is directly rotatably mounted on the core shaft 40 through the first bearing 321; the rotor assembly 23 is rotatably mounted on the core shaft 40 through the sun gear 32, that is, the radially inner end of the rotor assembly 23 is fixedly connected to the sun gear 32, and the rotor assembly 23 is indirectly rotatably mounted on the core shaft 40 by means of the first bearing 321.

[0059] In some other embodiments, the wheel 100 further includes a second bearing provided between the rotor assembly 23 and the core shaft 40, and the sun gear 32 is rotatably mounted on the core shaft 40 through the rotor assembly 23.

[0060] A second bearing is provided between the rotor assembly 23 and the core shaft 40, that is, the rotor assembly 23 is directly rotatably mounted on the core shaft 40 through the second bearing; the sun gear 32 is rotatably mounted on the core shaft 40 through the rotor assembly 23, that is, the sun gear 32 is fixedly connected to the radially inner end of the rotor assembly 23, and the sun gear 32 is indirectly rotatably mounted on the core shaft 40 by means of the second bearing.

[0061] It can be understood that the first bearing 321 and / or the second bearing can be a deep groove ball bearing, a roller bearing, a needle bearing, etc.

[0062] By adopting the above technical solutions, the sun gear 32 and the rotor assembly 23 are rotatably mounted on the core shaft 40 sharing the same bearing, making the structure relatively compact and facilitating assembly.

[0063] In other embodiments, a first bearing 321 can be provided between the sun gear 32 and the core shaft 40, and the sun gear 32 is directly rotatably mounted on the core shaft 40 through the first bearing 321; at the same time, a second bearing is provided between the rotor assembly 23 and the core shaft 40, and the rotor assembly 23 is directly rotatably mounted on the core shaft 40 through the second bearing.

[0064] Please also refer to Figures 2 to 4 , in some embodiments, the motor housing 21 has a mounting groove 212 with an opening facing the wheel spoke 12, and the planetary reduction mechanism 30 is located in the mounting groove 212.

[0065] Optionally, the motor housing 21 is formed by fixedly connecting a first sub-housing and a second sub-housing. For example, the first sub-housing and the second sub-housing can be fixedly connected by welding, fastener connection, snap connection, interference connection, press connection, etc. Among them, the first sub-housing is located between the wheel spoke 12 and the second sub-housing, and the first sub-housing forms the mounting groove 212 by its own depression.

[0066] Optionally, the shape of the mounting groove 212 is a circular groove.

[0067] The planetary reduction mechanism 30 is disposed within the mounting groove 212. It can be understood that the planetary reduction mechanism 30 can be sunk into the mounting groove 212; alternatively, the planetary reduction mechanism 30 can also be flush with the notch of the mounting groove 212; or, the planetary reduction mechanism 30 can protrude from the notch of the mounting groove 212.

[0068] The planetary reduction mechanism 30 is disposed within the mounting groove 212 of the motor housing 21, which can reduce the occupied space of the hub motor 20 and the planetary reduction mechanism 30 within the hub 10, facilitating the arrangement of other components (such as the braking mechanism 60) within the hub 10.

[0069] In other embodiments, the mounting groove 212 may not be provided on the motor housing 21. In this case, the planetary reduction mechanism 30 and the hub motor 20 occupy most of the space of the placement cavity 13, and other components (such as the braking mechanism 60) can be provided outside the hub 10.

[0070] Please also refer to Figure 3 and Figure 4 , in some embodiments, in the radial direction of the planet carrier 31, the wheel 100 further includes a third bearing 211 disposed between the planet carrier 31 and the motor housing 21, and the wheel 100 further includes a fourth bearing 313 disposed between the planet carrier 31 and the core shaft 40.

[0071] Optionally, the motor housing 21 is formed by fixedly connecting a first sub-housing and a second sub-housing. The first sub-housing is located between the wheel spoke 12 and the second sub-housing, and the third bearing 211 is disposed between the planet carrier 31 and the first sub-housing.

[0072] Optionally, the core shaft 40 includes a shaft body 41 and a connecting flange 42, and the fourth bearing 313 is disposed between the planet carrier 31 and the shaft body 41.

[0073] It can be understood that the third bearing 211 and / or the fourth bearing 313 can be a deep groove ball bearing, a roller bearing, a needle bearing, etc.

[0074] By respectively disposing the third bearing 211 and the fourth bearing 313 on both radial sides of the planet carrier 31, the friction during the rotation of the planet carrier 31 is reduced, facilitating the rotation of the planet carrier 31, and thus facilitating the rotation of the hub 10. Moreover, the second sub-housing is fixed on the core shaft 40, and the first sub-housing can be indirectly supported on the core shaft 40 through the third bearing 211, the planet carrier 31, and the fourth bearing 313, strengthening the support for the hub motor 20 to ensure the stability of the hub motor 20.

[0075] In other embodiments, only the third bearing 211 can be disposed between the planet carrier 31 and the motor housing 21; or, only the fourth bearing 313 can be disposed between the planet carrier 31 and the core shaft 40.

[0076] In some embodiments, the planetary reduction mechanism 30 further includes planet gears 33 and an internal gear ring 34.

[0077] The internal gear ring 34 is fixed in the mounting groove 212, that is, the internal gear ring 34 is stationary relative to the motor housing 21; it can be understood that the internal gear ring 34 can be fixed in the mounting groove 212 by means of welding, fastener connection, snap connection, press connection, interference connection, etc.

[0078] A plurality of planet gears 33 are respectively rotatably mounted on the planet carrier 31. It can be understood that the number of planet gears 33 can be two, three or more. Optionally, the plurality of planet gears 33 are evenly and spaced along the circumferential direction of the planet carrier 31.

[0079] Wherein, the sun gear 32 is located in the middle of the internal gear ring 34 and meshes with the plurality of planet gears 33, and the plurality of planet gears 33 mesh with the internal gear ring 34.

[0080] Please also refer to Figure 3 and Figure 4 , in some embodiments, the wheel 100 further includes a rotary encoder 50. The rotary encoder 50 includes an encoder stator 52, a stator seat 51, an encoder rotor 54 and a rotor seat 53. The encoder stator 52 is fixed on the stator seat 51, the stator seat 51 is fixed on the core shaft 40, the encoder rotor 54 is fixed on the rotor seat 53, and the rotor seat 53 is fixed on the planet carrier 31.

[0081] The rotary encoder 50 is used to monitor and detect the operating state of the wheel 100.

[0082] The encoder stator 52 is fixed on the stator seat 51, and the stator seat 51 is fixed on the core shaft 40, that is, the encoder stator 52 is stationary relative to the core shaft 40; the encoder rotor 54 is fixed on the rotor seat 53, and the rotor seat 53 is fixed on the planet carrier 31, that is, the encoder rotor 54 rotates relative to the core shaft 40.

[0083] Optionally, a sealing ring is provided between the rotor seat 53 and the planet carrier 31. After the rotor seat 53 is fixed on the planet carrier 31, it can play a role in sealing and protecting the encoder stator 52, the encoder rotor 54 and the fourth bearing 313.

[0084] Please refer to Figure 2 , a plurality of second fixing holes 311 are provided on the planet carrier 31. The plurality of second fixing holes 311 are spaced along the circumferential direction of the planet carrier 31. The rotor seat 53 is fixed on the planet carrier 31 by cooperating with the plurality of second fixing holes 311 through a plurality of second fixing screws.

[0085] Since the stator seat 51 is fixed on the mandrel 40 and the rotor seat 53 is fixed on the planet carrier 31, it can be understood that the rotary encoder 50 is installed at one end of the mandrel 40 close to the spoke 12. In this way, after the hub 10 is disassembled, the disassembly and assembly of the rotary encoder 50 can be realized, making the disassembly and assembly of the rotary encoder 50 relatively convenient, which is beneficial to later maintenance and replacement.

[0086] In other embodiments, the rotor seat 53 is not fixed on the planet carrier 31, but on the spoke 12.

[0087] Please refer to Figure 4 , in some embodiments, the mandrel 40 has a wire threading hole 411, and the rotary encoder 50 further includes a lead wire 55 connected to the encoder stator 52. The lead wire 55 passes through the wire threading hole 411 to connect to external devices.

[0088] Optionally, the wire threading hole 411 extends along the axial direction of the mandrel 40. It can be understood that the wire threading hole 411 can be a central hole, that is, the axis of the wire threading hole 411 coincides with the axis of the mandrel 40; or, the wire threading hole 411 can be an eccentric hole, that is, the axis of the wire threading hole 411 is parallel to the axis of the mandrel 40; or, the wire threading hole 411 is an inclined hole, that is, the axis of the wire threading hole 411 intersects with the axis of the mandrel 40.

[0089] In this embodiment, by passing the lead wire 55 through the wire threading hole 411 to connect to external devices, interference between the lead wire 55 and other components is avoided, ensuring that the lead wire 55 is not damaged and improving its service life.

[0090] In other embodiments, a wire threading groove can be opened on the outer peripheral wall of the mandrel 40. The wire threading groove extends along the axial direction of the mandrel 40, and the lead wire 55 passes through the wire threading groove to connect to external devices.

[0091] Please also refer to Figure 3 and Figure 4 , in some embodiments, the mandrel 40 includes a shaft body 41 and a connecting flange 42. The connecting flange 42 is arranged at one end of the shaft body 41 away from the spoke 12, and the motor housing 21 is fixed on the connecting flange 42.

[0092] The connecting flange 42 is arranged at one end of the shaft body 41 away from the spoke 12, that is, after the wheel 100 is installed on the vehicle body, the connecting flange 42 is at the axial inner end of the shaft body 41.

[0093] Optionally, the motor housing 21 is fixed on the connecting flange 42 by a plurality of fourth fixing screws.

[0094] Among them, the above-mentioned wire threading hole 411 is arranged in the shaft body 41, and the above-mentioned third fixing hole 421 is arranged on the connecting flange 42.

[0095] By providing a connecting flange 42 at one end of the shaft body 41, the connecting area can be increased, which is beneficial for the mandrel 40 to be connected to the motor housing 21 and the vehicle body respectively.

[0096] Please also refer to Figure 3 , Figure 5 and Figure 6 , in some embodiments, the wheel 100 further includes a braking mechanism 60 disposed in the placement cavity 13. The braking mechanism 60 includes a brake caliper 62 and a brake disc 61. The brake disc 61 is an annular disc, and the brake disc 61 is fixed on the rim 11. The jaws 621 of the brake caliper 62 face away from the center line of the rim 11.

[0097] Optionally, the brake disc 61 is fixed on the inner wall surface of the rim 11. For example, a plurality of fixing protrusions 111 are provided on the inner wall surface of the rim 11, and the plurality of fixing protrusions 111 are arranged at intervals along the circumferential direction of the rim 11; the brake disc 61 includes an annular plate 611 and a plurality of connecting plates 612 provided at the outer edge of the annular plate 611, and the plurality of connecting plates 612 are respectively arranged corresponding to the plurality of fixing protrusions 111. Among them, the two side surfaces of the annular plate 611 in its axial direction are the two large surfaces of the annular plate 611.

[0098] Optionally, both the fixing protrusions 111 and the connecting plates 612 are provided with connection holes, and fasteners pass through the connection holes on the connecting plates 612 and the fixing protrusions 111 to fix the brake disc 61 on the rim 11. It can be understood that the included angle between the connecting plate 612 and the annular plate 611 can be 180°. At this time, the connection holes on the fixing protrusions 111 extend along the axial direction of the hub 10, and the connection holes on the connecting plates 612 extend along the axial direction of the annular plate 611; or, the included angle between the connecting plate 612 and the annular plate 611 can be 90°. At this time, the connection holes on the fixing protrusions 111 extend along the radial direction of the hub 10, and the connection holes on the connecting plates 612 extend along the radial direction of the annular plate 611.

[0099] The jaws 621 of the brake caliper 62 face away from the center line of the rim 11. It can be understood that when the brake caliper 62 cooperates with the brake disc 61, the brake caliper 62 is first placed entirely on the radial inner side of the annular plate 611, and then moved radially outward of the annular plate 611 so that the two brake pads of the brake caliper 62 are on both axial sides of the annular plate 611; when the brake caliper 62 works, the annular plate 611 is clamped by the two brake pads to brake the hub 10, thereby realizing the braking of the electric vehicle. Since the initial position of the brake caliper 62 is located on the radial inner side of the annular plate 611, in this way, the space on the radial inner side of the annular plate 611 can be effectively utilized to accommodate the brake caliper 62, the occupation of the radial space of the hub 10 by the brake caliper 62 can be effectively reduced, there is no need to increase the radial dimension of the hub 10 to accommodate the brake caliper 62, which is beneficial to saving the radial space of the hub 10 and improving the space utilization rate inside the hub 10.

[0100] Optionally, the shape of the annular plate 611 is an annular disk.

[0101] It can be understood that the connecting plate 612 can be integrally formed with the annular plate 611; alternatively, the connecting plate 612 can also be fixed to the annular plate 611. For example, the connecting plate 612 can be fixed to the annular plate 611 by means of welding, fastener connection, snap connection, interference connection, crimping, etc.

[0102] It can be understood that the fixing convex part 111 can be integrally formed with the rim 11; alternatively, the fixing convex part 111 can also be fixed to the rim 11. For example, the fixing convex part 111 can also be fixed to the rim 11 by means of welding, fastener connection, snap connection, interference connection, crimping, etc.

[0103] The brake disc 61 is an annular disc, and other components can be placed in its middle position, improving the space utilization rate inside the wheel hub 10; moreover, the braking point of the brake caliper 62 is relatively close to the rim 11, increasing the braking torque, so that the electric vehicle requires less frictional force to stop within a certain period of time; since less frictional force is required, the brake disc 61 can be made thinner and lighter to achieve the purpose of weight reduction, thereby reducing the unsprung mass of the electric vehicle and increasing the comfort of the electric vehicle.

[0104] Please refer to Figure 4 and Figure 5 , in some embodiments, the brake caliper 62 is fixed to the motor housing 21.

[0105] Optionally, the brake caliper 62 is fixed to the outer wall surface of the motor housing 21 facing away from the wheel spoke 12; fixing posts are provided on the outer wall surface of the motor housing 21 facing away from the wheel spoke 12, the brake caliper 62 includes a connecting portion 622, threaded holes are provided on the fixing posts, through holes are provided on the connecting portion 622, and a fifth fixing screw passes through the through hole and is screwed into the threaded hole to fix the brake caliper 62 to the motor housing 21.

[0106] Among them, there are multiple fixing posts and connecting portions 622, for example, two, to ensure the stability of the brake caliper 62 fixed on the motor housing 21.

[0107] By fixing the brake caliper 62 to the motor housing 21, the integration degree of the wheel 100 is relatively high, which is beneficial to the installation of the wheel 100 on the vehicle body.

[0108] In other embodiments, the brake caliper 62 can be fixed to the vehicle body or the spindle 40.

[0109] A second aspect of the present application proposes an electric vehicle. The electric vehicle includes the wheel 100 as in the first aspect to achieve two-wheel drive for the front wheels, two-wheel drive for the rear wheels, and four-wheel drive of the electric vehicle.

[0110] The electric vehicle adopts any one or more of the above embodiments of the wheel 100, and thus has the beneficial effects of the above embodiments, which will not be elaborated one by one here.

[0111] The above embodiments are only used to illustrate the technical solutions of the present application, rather than limiting them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and should all be included in the protection scope of the present application.

Claims

1. A wheel, characterized in that: It includes a wheel hub, a wheel hub motor, a planetary reduction mechanism and a spindle, the wheel hub includes a rim and spokes, the rim and the spokes form a placement cavity, the wheel hub motor and the planetary reduction mechanism are both located in the placement cavity and on the same side of the spokes; the wheel hub motor includes a motor housing, a motor stator and a rotor assembly, the motor stator is fixed in the motor housing, and the radial outer end of the rotor assembly is arranged corresponding to the motor stator; the planetary reduction mechanism includes a planet carrier and a sun gear, the radial inner end of the rotor assembly is fixedly connected to the sun gear, and the planet carrier is fixedly connected to the spokes; the spindle is connected to the vehicle body, the motor housing is fixed on the spindle, and the planet carrier, the sun gear and the rotor assembly are all rotatably mounted on the spindle.

2. The wheel according to claim 1, characterized in that: The wheel also includes a first bearing arranged between the sun gear and the core shaft, and the rotor assembly is rotatably mounted on the core shaft through the sun gear; or, the wheel also includes a second bearing arranged between the rotor assembly and the core shaft, and the sun gear is rotatably mounted on the core shaft through the rotor assembly.

3. The wheel according to claim 1, characterized in that: The motor housing has a mounting groove opening toward the wheel spoke, and the planetary reduction mechanism is located in the mounting groove.

4. The wheel according to claim 3, characterized in that: In the radial direction of the planet carrier, the wheel further includes a third bearing arranged between the planet carrier and the motor housing, and / or the wheel further includes a fourth bearing arranged between the planet carrier and the spindle.

5. The wheel according to claim 1, characterized in that: The wheel also includes a rotary encoder, which includes an encoder stator, a stator seat, an encoder rotor and a rotor seat. The encoder stator is fixed on the stator seat, the stator seat is fixed on the core shaft, the encoder rotor is fixed on the rotor seat, and the rotor seat is fixed on the planet carrier or the spoke.

6. The wheel according to claim 5, characterized in that: The core shaft has a threading hole, and the rotary encoder also includes a lead wire connected to the encoder stator, and the lead wire passes through the threading hole to connect to an external device.

7. The wheel according to any one of claims 1 to 6, characterized in that: The core shaft comprises a shaft body and a connecting flange. The connecting flange is arranged at one end of the shaft body away from the spokes, and the motor housing is fixed on the connecting flange.

8. The wheel according to any one of claims 1 to 6, characterized in that: The wheel also includes a brake mechanism in the placement cavity, the brake mechanism includes a brake caliper and a brake disc, the brake disc is an annular disc, the brake disc is fixed on the rim, and the jaws of the brake caliper are facing away from the center line of the rim.

9. The wheel according to claim 8, characterized in that: The brake caliper is fixed on the motor housing or the spindle.

10. An electric vehicle, characterized in that: Comprising the wheel as claimed in any one of claims 1-9.

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