Hub assembly and vehicle

Abstract

A hub assembly (1) and a vehicle. The hub assembly (1) of the present invention comprises a hub motor (11) and a brake disc assembly. A first cavity is formed in the hub motor (11); and a second cavity and a cooling flow channel for communicating the second cavity with the first cavity are formed in the brake disc assembly, wherein the cooling flow channel is adapted to guide a cooling liquid in the first cavity to the second cavity so as to dissipate heat from at least part of the brake disc assembly.

Description

Wheel hub assembly and vehicle

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to Chinese patent application number 202311028538.9, filed on August 14, 2023, entitled “Wheel Hub Assembly and Vehicle,” the entire contents of which are incorporated by reference into this application. Technical Field

[0003] The present invention relates to the field of vehicles, and in particular to a wheel hub assembly and a vehicle. Background Art

[0004] The brake disc of a vehicle is a key structure that provides braking force for the vehicle. The heat dissipation effect of the brake disc will affect the braking performance of the vehicle. In the existing technology, the heat dissipation of the brake disc is usually achieved by air cooling. However, when the hub motor is installed on the wheel end of the vehicle, the heat of the motor will affect the air cooling effect of the brake disc. If the brake disc is not cooled in time, it will affect the braking performance of the vehicle and bring safety hazards to the vehicle.

[0005] Summary of the Invention

[0006] The present invention aims to solve one of the technical problems in the related art at least to a certain extent.

[0007] To this end, one object of the present invention is to provide a wheel hub assembly.

[0008] Another object of the present invention is to provide a vehicle having the above-mentioned wheel hub assembly.

[0009] According to the present invention, the wheel hub assembly includes a wheel hub motor and a brake disc assembly, wherein a first cavity is formed in the wheel hub motor; a second cavity and a cooling channel connecting the second cavity with the first cavity are formed in the brake disc assembly, wherein the cooling channel is suitable for draining the coolant in the first cavity to the second cavity to dissipate heat for at least part of the brake disc assembly.

[0010] According to the wheel hub assembly of the present invention, a cooling channel is provided in the brake disc assembly to connect the first cavity of the wheel hub motor with the second cavity of the brake disc assembly. The heat dissipation effect of the brake disc assembly is improved by circulating the coolant, thereby ensuring the braking performance of the brake disc assembly and improving the safety of the wheel hub assembly.

[0011] In addition, the solar cell support according to the above embodiment of the present invention may also have the following additional technical features:

[0012] According to an example of the present invention, the brake disc assembly includes a brake disc body and a transmission mechanism, the brake disc body is connected to the hub motor, a second cavity is formed on the brake disc body, and the second cavity is arranged inside the brake disc body around the center of the brake disc body; the transmission mechanism is arranged on the side of the brake disc body away from the hub motor, and a cooling channel is formed on the transmission mechanism, and the two ends of the cooling channel are respectively connected to the first cavity and the second cavity.

[0013] According to one embodiment of the present invention, the transmission mechanism includes a rotating shaft and a sleeve, one end of the rotating shaft is connected to the brake disc body, and an axially open accommodating cavity is formed on the sleeve, and the accommodating cavity is suitable for accommodating at least a portion of the rotating shaft, and the rotating shaft can rotate relative to the sleeve, wherein a first inlet channel and a first outlet channel connected to the second cavity are formed on the rotating shaft, and a second inlet channel and a second outlet channel connected to the first cavity and extending into the accommodating cavity are formed on the sleeve, the first outlet channel and the second outlet channel are connected and configured as at least a portion of the cooling channel, and the first inlet channel and the second inlet channel are connected and configured as at least another portion of the cooling channel.

[0014] According to an example of the present invention, the outlet of the second inlet channel is arranged on the end wall or the peripheral wall of the accommodating cavity; the inlet of the second outlet channel is arranged on the end wall or the peripheral wall of the accommodating cavity.

[0015] According to an example of the present invention, a first groove and a second groove are arranged around the inner circumferential wall of the accommodating cavity, and the first groove and the second groove are spaced apart in the axial direction, wherein the first groove is connected with the outlet of the second inlet channel and is opposite to the inlet of the first inlet channel in the radial direction of the rotating shaft; the second groove is connected with the inlet of the second outlet channel and is opposite to the outlet of the first outlet channel in the radial direction of the rotating shaft.

[0016] According to an example of the present invention, the end wall of the accommodating cavity is provided with a first groove and a second groove, and the first groove and the second groove are set as two annular grooves with the same center and different radii, wherein the first groove is connected with the outlet of the second inlet channel and the inlet of the first inlet channel, and the axial projection of the inlet of the first inlet channel falls into the first groove, and the second groove is connected with the inlet of the second outlet channel and the outlet of the first outlet channel, and the axial projection of the outlet of the first outlet channel falls into the second groove.

[0017] According to an example of the present invention, the rotating shaft includes a shaft portion and a disc portion, the shaft portion is accommodated in the accommodating cavity, and the outer periphery of the shaft portion is formed with an inlet of the first inlet channel and an outlet of the first outlet channel; the disc portion is connected to the shaft portion and is arranged on the radial inner periphery of the brake disc body, and the radial outer periphery of the disc portion is formed with an outlet of the first inlet channel and an inlet of the first outlet channel, and the outlet of the first inlet channel and the inlet of the first outlet channel are respectively connected to the second cavity.

[0018] According to an example of the present invention, the wheel hub assembly further includes a steering knuckle, which is arranged on a side of the transmission mechanism away from the brake disc body, and the transmission mechanism is connected to the wheel hub motor.

[0019] According to an example of the present invention, the wheel hub assembly further includes an end cover, which is arranged on a side of the steering knuckle facing away from the transmission mechanism, and at least a portion of the end cover passes through the steering knuckle and abuts against the transmission mechanism.

[0020] According to an example of the present invention, a third inlet channel and a third outlet channel connected to the first cavity and extending in the axial direction are formed on the end cover, the third inlet channel is connected to the second inlet channel, and the third outlet channel is connected to the second outlet channel.

[0021] According to an example of the present invention, the wheel hub assembly further includes two connecting pipes, and the two connecting pipes respectively connect the third inlet flow channel and the third outlet flow channel with the first cavity.

[0022] The vehicle according to the present invention will be briefly described below.

[0023] The vehicle according to the present invention includes the wheel hub assembly in the above-mentioned embodiment. Since the vehicle according to the present invention is provided with the wheel hub assembly in the above-mentioned embodiment, during operation of the vehicle, the wheel hub assembly can drain the coolant in the first cavity to the second cavity through the cooling flow channel to achieve heat dissipation of the brake disc assembly, and the coolant can circulate in the first cavity, the second cavity and the cooling flow channel, thereby improving the heat dissipation effect of the brake disc assembly, ensuring the braking performance of the vehicle, and thereby improving the safety of the vehicle.

[0024] Additional aspects and advantages of the present invention will be set forth in part in the description which follows and, in part, will be obvious from the description which follows, or may be learned by practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the following description of the embodiments with reference to the accompanying drawings, in which:

[0026] FIG1 is an exploded view of a wheel hub assembly according to one embodiment of the present invention;

[0027] FIG2 is a structural diagram of a wheel hub assembly according to one embodiment of the present invention;

[0028] FIG3 is an assembly diagram of a steering knuckle and an end cover according to one embodiment of the present invention;

[0029] FIG4 is a cross-sectional view of a sleeve according to one embodiment of the present invention;

[0030] FIG5 is a cross-sectional view of a rotating shaft according to one embodiment of the present invention;

[0031] FIG6 is a cross-sectional view of an end cap according to one embodiment of the present invention;

[0032] FIG7 is a cross-sectional view of an assembled sleeve and a rotating shaft according to an embodiment of the present invention.

[0033] Figure numerals: wheel hub assembly 1; wheel hub motor 11, brake disc body 12, transmission mechanism 13; rotating shaft 131, first inlet channel 1311, first outlet channel 1312, shaft portion 1313, disc portion 1314; sleeve 132, accommodating cavity 1321, first groove 1322, second groove 1323, second inlet channel 1324, second outlet channel 1325; steering knuckle 14, end cover 15, third inlet channel 151, third outlet channel 152, connecting pipe 16. DETAILED DESCRIPTION

[0034] The following describes embodiments of the present invention in detail, examples of which 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 are not to be construed as limiting the present invention.

[0035] The brake disc of a vehicle is a key structure that provides braking force for the vehicle. The heat dissipation effect of the brake disc will affect the braking performance of the vehicle. In the existing technology, the heat dissipation of the brake disc is usually achieved by air cooling. However, when the hub motor is installed on the wheel end of the vehicle, the heat of the motor will affect the air cooling effect of the brake disc. If the brake disc is not cooled in time, it will affect the braking performance of the vehicle and bring safety hazards to the vehicle.

[0036] The following describes a wheel hub assembly according to an embodiment of the present invention with reference to FIG1 to FIG7 .

[0037] The wheel hub assembly 1 according to the present invention includes a wheel hub motor 11 and a brake disc assembly, wherein a first cavity is formed in the wheel hub motor 11; a second cavity and a cooling channel connecting the second cavity with the first cavity are formed in the brake disc assembly, and the cooling channel is suitable for draining the coolant in the first cavity to the second cavity to dissipate heat to at least part of the brake disc assembly.

[0038] According to the present invention, the wheel hub assembly 1 is provided with a first cavity within the wheel hub motor 11, which can accommodate coolant. Simultaneously, the wheel hub assembly 1 is provided with a second cavity within the brake disc assembly, and a cooling channel is constructed to connect the second cavity with the first cavity. The cooling channel can drain the coolant in the first cavity into the second cavity. Specifically, when the wheel hub assembly 1 is operating, the drive structure within the wheel hub motor 11 can drive the coolant to flow to the cooling channel. Under the drainage effect of the cooling channel, the coolant can reach the second cavity and absorb heat from the brake disc assembly. After absorbing heat, the coolant can return to the first cavity through the cooling channel to achieve coolant recycling.

[0039] The driving structure can be understood as a structure such as an oil pump for driving the coolant. It is worth noting that the route of the coolant flowing to the second cavity is different from the route of the coolant flowing back to the first cavity. The coolant route design realizes the recycling of the coolant and can reduce costs. The cooperation between the first cavity, the second cavity and the cooling channel forms a circulation loop of the coolant. The coolant flowing in the circulation loop can take away the heat transferred from the brake disc assembly to the second cavity. The wheel hub assembly 1 performs heat exchange in the second cavity through the coolant to achieve heat dissipation of the brake disc assembly. Compared with the traditional air-cooled heat dissipation method, the heat dissipation method of the present invention has a better heat dissipation effect, ensures the braking performance of the brake disc assembly, and improves the safety of the vehicle.

[0040] According to one embodiment of the present invention, the brake disc assembly includes a brake disc body 12 and a transmission mechanism 13. The brake disc body 12 is connected to the wheel hub motor 11. A second cavity is formed on the brake disc body 12. The second cavity is arranged inside the brake disc body 12 around the center of the brake disc body 12; the transmission mechanism 13 is arranged on the side of the brake disc body 12 away from the wheel hub motor 11. A cooling channel is formed on the transmission mechanism 13, and the two ends of the cooling channel are respectively connected to the first cavity and the second cavity.

[0041] Since a cooling channel and a second cavity are formed in the brake disc assembly, the structure of the brake disc assembly will affect the flow of the coolant. The brake disc assembly includes a brake disc body 12 and a transmission mechanism 13, wherein the brake disc body 12 is a structure used by the vehicle to provide braking force, and the transmission mechanism 13 is used to construct the cooling channel. A second cavity is formed in the brake disc body 12, and the cooling channel connects the second cavity with the first cavity. After passing through the cooling channel, the coolant can enter the second cavity and perform heat exchange in the second cavity to reduce the heat of the brake disc body 12. It is worth noting that the second cavity can be constructed as an annular cavity arranged around the center of the brake disc body 12. The design of the second cavity can increase the area for heat exchange of the coolant, thereby improving the heat dissipation effect of the brake disc body 12.

[0042] According to one embodiment of the present invention, the transmission mechanism 13 includes a rotating shaft 131 and a sleeve 132, one end of the rotating shaft 131 is connected to the brake disc body 12, and the other end of the rotating shaft 131 is connected to the sleeve 132, and an axially open accommodating cavity 1321 is formed on the sleeve 132, and the accommodating cavity 1321 is suitable for accommodating at least part of the rotating shaft 131, and the rotating shaft 131 can rotate relative to the sleeve 132, wherein a first inlet channel 1311 and a first outlet channel 1312 communicating with the second cavity are formed on the rotating shaft 131, and a second inlet channel 1324 and a second outlet channel 1325 communicating with the first cavity and extending into the accommodating cavity 1321 are formed on the sleeve 132, the first outlet channel 1312 and the second outlet channel 1325 are communicated with each other and configured as at least a partial cooling channel, and the first inlet channel 1311 and the second inlet channel 1324 are communicated with each other and configured as at least another partial cooling channel.

[0043] Because cooling channels are formed within the transmission mechanism 13, the structure of the transmission mechanism 13 influences the design of the cooling channels. The transmission mechanism 13 includes a sleeve 132 and a rotating shaft 131. The rotating shaft 131 is connected to the brake disc body 12 and, during operation, can rotate synchronously with the brake disc body 12. A sleeve 132 is provided at the end of the rotating shaft 131 away from the brake disc body 12. The sleeve 132 defines an axially open accommodating cavity 1321. During assembly, at least a portion of the rotating shaft 131 can be accommodated within the accommodating cavity 1321 and can rotate relative to the sleeve 132. The provision of the accommodating cavity 1321 improves the stability of the rotating shaft 131 during relative rotation with the sleeve 132.

[0044] In addition, a first inlet channel 1311 and a first outlet channel 1312 communicating with the second cavity are formed on the rotating shaft 131, and a second inlet channel 1324 and a second outlet channel 1325 communicating with the first cavity are formed on the sleeve 132. When the rotating shaft 131 and the sleeve 132 are assembled, the first inlet channel 1311 and the second inlet channel 1324 cooperate to form at least a part of the cooling channel and connect the first cavity and the second cavity, and the first outlet channel 1312 and the second outlet channel 1325 cooperate to form at least another part of the cooling channel and connect the second cavity with the first cavity. Specifically, the flow route of the coolant can be simply summarized as follows: the coolant flows out of the first cavity, passes through the second inlet channel 1324 and the first inlet channel 1311 in sequence, and then enters the second cavity. The coolant undergoes heat exchange in the second cavity and flows out of the second cavity, passes through the first outlet channel 1312 and the second outlet channel 1325 in sequence, and then flows into the first cavity. The structure of the transmission mechanism 13 realizes the recycling of the coolant, which can continuously dissipate heat from the brake disc body 12 while saving costs, thereby improving the heat dissipation effect of the brake disc body 12.

[0045] According to one embodiment of the present invention, the outlet of the second inlet channel 1324 is disposed on the end wall or peripheral wall of the accommodating cavity 1321; the inlet of the second outlet channel 1325 is disposed on the end wall or peripheral wall of the accommodating cavity 1321. Specifically, the sleeve 132 disposes the outlet of the second inlet channel 1324 on the peripheral wall of the accommodating cavity 1321. At the same time, the sleeve 132 also disposes the inlet of the second outlet channel 1325 on the peripheral wall of the accommodating cavity 1321. It is worth noting that the inlet of the second outlet channel 1325 and the outlet of the second inlet channel 1324 are misaligned as projected on the sleeve 132. The design of the inlet of the second outlet channel 1325 and the outlet of the second inlet channel 1324 can avoid interference between the route of the coolant flowing to the second cavity and the route of the coolant flowing back to the first cavity, thereby ensuring that the coolant can be circulated normally.

[0046] According to one embodiment of the present invention, a first groove 1322 and a second groove 1323 are arranged around the inner circumferential wall of the accommodating cavity 1321, and the first groove 1322 and the second groove 1323 are spaced apart in the axial direction, wherein the first groove 1322 is connected with the outlet of the second inlet channel 1324 and is opposite to the inlet of the first inlet channel 1311 in the radial direction of the rotating shaft 131; the second groove 1323 is connected with the inlet of the second outlet channel 1325 and is opposite to the outlet of the first outlet channel 1312 in the radial direction of the rotating shaft 131.

[0047] Because at least a portion of the rotating shaft 131 is housed within the accommodating cavity 1321, the structure of the accommodating cavity 1321 affects the flow of coolant between the sleeve 132 and the rotating shaft 131. A first groove 1322 and a second groove 1323 are formed around the inner circumferential wall of the accommodating cavity 1321. The first groove 1322 and the second groove 1323 are spaced apart in the axial direction. The outlet of the second inlet channel 1324 communicates with the first groove 1322, and the inlet of the second outlet channel 1325 communicates with the second groove 1323. When the sleeve 132 is assembled with the rotating shaft 131, the inlet of the first inlet channel 1311 communicates with the first groove 1322, and the outlet of the first outlet channel 1312 communicates with the second groove 1323. Here, the communication relationship between the inlet of the first inlet channel 1311 and the first groove 1322 can be such that the inlet of the first inlet channel 1311 and the first groove 1322 are directly opposite each other in the radial direction of the rotating shaft 131. Similarly, the communication relationship between the outlet of the first outlet channel 1312 and the second groove 1323 can be such that the outlet of the first outlet channel 1312 and the second groove 1323 are directly opposite each other in the radial direction of the rotating shaft 131. When the rotating shaft 131 rotates within the accommodating chamber 1321, the inlet of the first inlet channel 1311 directly opposite the first groove 1322 in the radial direction can always maintain a communication relationship with the outlet of the second inlet channel 1324. Similarly, the outlet of the first outlet channel 1312 directly opposite the second groove 1323 in the radial direction can always maintain a communication relationship with the inlet of the second outlet channel 1325.

[0048] At this point, the flow of coolant in transmission mechanism 13 can be understood as follows: coolant flowing out of the first cavity enters first groove 1322 through second inlet channel 1324, and coolant entering first groove 1322 can enter the second cavity through first inlet channel 1311; coolant flowing out of the second cavity enters second groove 1323 through first outlet channel 1312, and coolant entering second groove 1323 can enter the first cavity through second outlet channel 1325. The design of first groove 1322 and second groove 1323 avoids interference between the reciprocating routes of the coolant during circulation, ensuring the circulation of the coolant.

[0049] According to one embodiment of the present invention, the end wall of the accommodating cavity 1321 is provided with a first groove 1322 and a second groove 1323, and the first groove 1322 and the second groove 1323 are set as two annular grooves with the same center and different radii, wherein the first groove 1322 is connected with the outlet of the second inlet channel 1324 and the inlet of the first inlet channel 1311, and the axial projection of the inlet of the first inlet channel 1311 falls into the first groove 1322, and the second groove 1323 is connected with the inlet of the second outlet channel 1325 and the outlet of the first outlet channel 1312, and the axial projection of the outlet of the first outlet channel 1312 falls into the second groove 1323.

[0050] Since at least a portion of the rotating shaft 131 is accommodated within the accommodating chamber 1321, the structure of the accommodating chamber 1321 affects the flow of coolant between the shaft sleeve 132 and the rotating shaft 131. A first groove 1322 and a second groove 1323 are provided on the end wall of the accommodating chamber 1321. The first groove 1322 and the second groove 1323 form annular grooves with concentric centers and different radii on the end wall of the accommodating chamber 1321. At the same time, the outlet of the second inlet channel 1324 is connected to the first groove 1322, and the inlet of the second outlet channel 1325 is connected to the second groove 1323. It can also be understood that the outlet of the second inlet channel 1324 is provided within the first groove 1322, and the inlet of the second outlet channel 1325 is provided within the second groove 1323. When the rotating shaft 131 is inserted deeply into the accommodating cavity 1321, the axial projection of the inlet of the first inlet channel 1311 falls into the first groove 1322, and the axial projection of the outlet of the first outlet channel 1312 falls into the second groove 1323. As the rotating shaft 131 rotates, the first inlet channel 1311 maintains constant communication with the first groove 1322, and similarly, the first outlet channel 1312 maintains constant communication with the second groove 1323. The arrangement of the first groove 1322 and the second groove 1323 prevents interference between the reciprocating paths of the coolant during circulation, ensuring the circulation of the coolant.

[0051] According to one embodiment of the present invention, the rotating shaft 131 includes a shaft portion 1313 and a disc portion 1314. The shaft portion 1313 is accommodated in the accommodating cavity 1321, and the outer periphery of the shaft portion 1313 is formed with an inlet of a first inlet channel 1311 and an outlet of a first outlet channel 1312; the disc portion 1314 is connected to the shaft portion 1313 and is arranged on the radial inner periphery of the brake disc body 12, and the radial outer periphery of the disc portion 1314 is formed with an outlet of a first inlet channel 1311 and an inlet of a first outlet channel 1312, and the outlet of the first inlet channel 1311 and the inlet of the first outlet channel 1312 are respectively connected to the second cavity.

[0052] Since the rotating shaft 131 can realize the mutual flow of coolant between the sleeve 132 and the brake disc body 12, the structure of the rotating shaft 131 will affect the flow of coolant. The rotating shaft 131 is constructed with a shaft portion 1313 and a disc portion 1314, wherein the shaft portion 1313 can be accommodated in the accommodating cavity 1321, and an inlet to the first inlet channel 1311 and an outlet to the first outlet channel 1312 are formed on the outer periphery of the shaft portion 1313. The design of the shaft portion 1313 ensures the flow of coolant between the sleeve 132 and the rotating shaft 131; the disc portion 1314 is connected to the shaft portion 1313 and is arranged on the radial inner periphery of the brake disc body 12, which improves the connection between the rotating shaft 131 and the brake disc body. In order to ensure the stability of the connection between the brake disc body 12 and the brake disc body 12, an outlet of a first inlet channel 1311 and an inlet of a first outlet channel 1312 which are respectively connected to the second cavity are formed on the radial periphery of the disc portion 1314. The position design of the outlet of the first inlet channel 1311 and the inlet of the first outlet channel 1312 can enable the coolant to flow into or out of the second cavity in the radial direction. Compared with the flow in other directions, since the disc portion 1314 and the brake disc body 12 maintain synchronous rotation, the flow efficiency of the coolant in the radial direction is higher.

[0053] According to one embodiment of the present invention, the wheel hub assembly 1 further includes a steering knuckle 14, which is disposed on the side of the transmission mechanism 13 facing away from the brake disc body 12. The transmission mechanism 13 is connected to the wheel hub motor 11. The structure of the wheel hub assembly 1 may affect the stability of the fit between the transmission mechanism 13 and the brake disc body 12. The wheel hub assembly 1 is provided with a steering knuckle 14 on the side of the transmission mechanism 13 facing away from the brake disc body 12. The steering knuckle 14 is connected to the wheel hub motor 11 and can abut against the transmission mechanism 13 in the axial direction, thereby improving the stability of the fit between the transmission mechanism 13 and the brake disc body 12.

[0054] According to one embodiment of the present invention, the wheel hub assembly 1 further includes an end cap 15, which is disposed on the side of the steering knuckle 14 facing away from the transmission mechanism 13. At least a portion of the end cap 15 passes through the steering knuckle 14 and abuts against the transmission mechanism 13. The wheel hub assembly 1 is further provided with an end cap 15 on the side of the steering knuckle 14 facing away from the transmission mechanism 13. At least a portion of the end cap 15 can pass through the steering knuckle 14 and abut against the transmission mechanism 13. At least another portion of the end cap 15 can be secured to the steering knuckle 14 via fasteners such as bolts. The provision of the end cap 15 further improves the stability of the wheel hub assembly 1.

[0055] According to one embodiment of the present invention, a third inlet channel 151 and a third outlet channel 152 are formed on the end cover 15, communicating with the first cavity and extending in the axial direction. The third inlet channel 151 communicates with the second inlet channel 1324, and the third outlet channel 152 communicates with the second outlet channel 1325. After the wheel hub assembly 1 is assembled, the connection between the cooling channel and the first cavity will be affected by the steering knuckle 14 and the end cover 15. The wheel hub assembly 1 is provided with a third inlet channel 151 and a third outlet channel 152 extending in the axial direction on the end cover 15. The third inlet channel 151 and the third outlet channel 152 respectively connect the second inlet channel 1324 and the second outlet channel 1325 with the first cavity, ensuring normal flow of coolant.

[0056] According to one embodiment of the present invention, the wheel hub assembly 1 further includes two connecting pipes 16, each of which connects the third inlet flow channel 151 and the third outlet flow channel 152 to the first cavity. The wheel hub assembly 1 is provided with two connecting pipes 16 outside the brake disc assembly, each of which connects the third inlet flow channel 151 and the third outlet flow channel 152 to the first cavity. The provision of the connecting pipes 16 enables cooling to flow between the first cavity and the transmission mechanism 13. Furthermore, the provision of the connecting pipes 16 outside the brake disc assembly prevents interference between the connecting pipes 16 and the brake disc assembly during operation, thereby improving the safety of the wheel hub assembly 1.

[0057] In some embodiments, the wheel hub assembly 1 may further include a heat dissipation structure within the wheel hub motor 11 for cooling. The heat dissipation structure may be a radiator, heat sink, or other type of heat dissipation structure. After the coolant flows back into the first cavity, the heat-carrying coolant is cooled by the heat dissipation structure. This allows the coolant to be recirculated into the second cavity at a low temperature, further improving the heat dissipation efficiency of the wheel hub assembly 1.

[0058] The vehicle according to the present invention will be briefly described below.

[0059] The vehicle according to the present invention includes the wheel hub assembly 1 in the above-mentioned embodiment. Since the vehicle according to the present invention is provided with the wheel hub assembly 1 in the above-mentioned embodiment, during operation of the vehicle, the wheel hub assembly 1 can drain the coolant in the first cavity to the second cavity through the cooling flow channel to achieve heat dissipation of the brake disc assembly, and the coolant can circulate in the first cavity, the second cavity and the cooling flow channel, thereby improving the heat dissipation effect of the brake disc assembly, ensuring the braking performance of the vehicle, and thereby improving the safety of the vehicle.

[0060] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention 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, and therefore should not be understood as limiting the present invention.

[0061] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature identified as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, "plurality" means more than two, unless otherwise specifically defined.

[0062] In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "connect," "fixed," etc. should be understood broadly. For example, they may refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0063] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0064] In the description of this specification, the reference terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and features of different embodiments or examples without contradiction.

[0065] Although the embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and are not to be construed as limitations on the present invention. A person skilled in the art may change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A wheel hub assembly, characterized in that: include: A wheel hub motor, wherein a first cavity is formed in the wheel hub motor; A brake disc assembly is formed with a second cavity and a cooling channel connecting the second cavity with the first cavity, wherein the cooling channel is suitable for guiding the coolant in the first cavity to the second cavity to dissipate heat for at least part of the brake disc assembly.

2. The wheel hub assembly according to claim 1, characterized in that: The brake disc assembly comprises: A brake disc body, wherein the brake disc body is connected to the wheel hub motor, a second cavity is formed on the brake disc body, and the second cavity surrounds the center of the brake disc body and is arranged inside the brake disc body; The transmission mechanism is arranged on a side of the brake disc body away from the hub motor. A cooling channel is formed on the transmission mechanism. Two ends of the cooling channel are respectively connected to the first cavity and the second cavity.

3. The wheel hub assembly according to claim 2, characterized in that: The transmission mechanism comprises: A rotating shaft, one end of which is connected to the brake disc body, A shaft sleeve is formed with an accommodating cavity which is open in the axial direction, and the accommodating cavity is suitable for accommodating at least part of the rotating shaft, and the rotating shaft can rotate relative to the shaft sleeve, wherein A first inlet channel and a first outlet channel connected to the second cavity are formed on the rotating shaft, and a second inlet channel and a second outlet channel connected to the first cavity and extending into the accommodating cavity are formed on the sleeve. The first outlet channel and the second outlet channel are connected and configured as at least part of the cooling channel, and the first inlet channel and the second inlet channel are connected and configured as at least another part of the cooling channel.

4. The wheel hub assembly according to claim 3, characterized in that: The outlet of the second inlet channel is arranged on the end wall or the peripheral wall of the accommodating cavity; the inlet of the second outlet channel is arranged on the end wall or the peripheral wall of the accommodating cavity.

5. The wheel hub assembly according to claim 4, characterized in that: The inner peripheral wall of the accommodating cavity is surrounded by a first groove and a second groove, and the first groove and the second groove are spaced apart in the axial direction, wherein The first groove is connected to the outlet of the second inlet channel and the inlet of the first inlet channel, and the inlet of the first inlet channel is directly opposite to the first groove in the radial direction of the rotating shaft; The second groove is communicated with the inlet of the second outlet flow channel and the outlet of the first outlet flow channel, and the outlet of the first outlet flow channel is directly opposite to the second groove in the radial direction of the rotating shaft.

6. The wheel hub assembly according to claim 4 or 5, characterized in that: The end wall of the accommodating cavity is provided with a first groove and a second groove, and the first groove and the second groove are provided as two annular grooves with the same center and different radii; The first groove is connected to the outlet of the second inlet channel and the inlet of the first inlet channel, and the axial projection of the inlet of the first inlet channel falls into the first groove. The second groove is connected to the inlet of the second outlet channel and the outlet of the first outlet channel, and the axial projection of the outlet of the first outlet channel falls into the second groove.

7. The wheel hub assembly according to any one of claims 3 to 6, characterized in that: The rotating shaft comprises: A shaft portion, the shaft portion is received in the accommodating cavity, and an inlet of the first inlet flow channel and an outlet of the first outlet flow channel are formed on an outer periphery of the shaft portion; A disc portion is connected to the shaft portion and is arranged on the radial inner periphery of the brake disc body. The radial outer periphery of the disc portion is formed with an outlet of the first inlet channel and an inlet of the first outlet channel. The outlet of the first inlet channel and the inlet of the first outlet channel are respectively connected to the second cavity.

8. The wheel hub assembly according to any one of claims 3 to 7, characterized in that: Also includes: A steering knuckle is arranged on a side of the transmission mechanism away from the brake disc body, and the transmission mechanism is connected to the wheel hub motor.

9. The wheel hub assembly according to claim 8, characterized in that: Also includes: An end cover is arranged on a side of the steering knuckle facing away from the transmission mechanism, and at least a portion of the end cover passes through the steering knuckle and abuts against the transmission mechanism.

10. The wheel hub assembly according to claim 9, characterized in that: The end cover is formed with a third inlet flow channel and a third outlet flow channel which are connected to the first cavity and extend in the axial direction. The third inlet flow channel is connected to the second inlet flow channel, and the third outlet flow channel is connected to the second outlet flow channel.

11. The wheel hub assembly according to claim 10, characterized in that: Also includes: The connecting pipe is structured in two pieces, and the two connecting pipes respectively connect the third inlet channel and the third outlet channel with the first cavity.

12. A vehicle, characterized in that: A wheel hub assembly comprising any one of claims 1-11.

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