Wheel assembly and vehicle

Abstract

This invention discloses a wheel hub assembly and a vehicle. The wheel hub assembly according to the invention includes a hub motor and a brake disc assembly. The hub motor has a first cavity formed therein; the brake disc assembly has a second cavity formed therein and a cooling channel communicating between the second cavity and the first cavity. The cooling channel is adapted to guide coolant from the first cavity to the second cavity to dissipate heat from at least a portion of the brake disc assembly. By providing a cooling channel within the brake disc assembly to communicate the first cavity of the hub motor and the second cavity of the brake disc assembly, the wheel hub assembly according to the invention improves the heat dissipation effect of the brake disc assembly through the circulation of coolant, ensuring the braking performance of the brake disc assembly and improving the safety of the wheel hub assembly.

Description

Technical Field

[0001] This invention relates to the field of vehicles, and more particularly to a wheel hub assembly and a vehicle. Background Technology

[0002] The brake disc is a key structure that provides braking force to a vehicle. The heat dissipation of the brake disc affects the vehicle's braking performance. In the current technology, brake discs are usually cooled by air. However, when the hub motor is installed at the wheel end of the vehicle, the heat from the motor will affect the air cooling effect of the brake disc. Insufficient heat dissipation of the brake disc will affect the vehicle's braking performance and pose a safety hazard. Summary of the Invention

[0003] This invention aims to at least solve one of the technical problems existing in the prior art. Therefore, one object of this invention is to provide a wheel hub assembly. The wheel hub assembly according to the invention connects the first cavity of the wheel hub motor and the second cavity of the brake disc assembly by providing a cooling channel within the brake disc assembly. The circulation of coolant improves the heat dissipation effect of the brake disc assembly, ensuring the braking performance of the brake disc assembly and improving the safety of the wheel hub assembly.

[0004] The present invention also proposes a vehicle including the above-described wheel hub assembly.

[0005] The wheel hub assembly according to the present invention includes a wheel hub motor and a brake disc assembly, wherein a first cavity is formed in the wheel hub motor; a second cavity is formed in the brake disc assembly and a cooling channel communicating the second cavity and the first cavity, the cooling channel being adapted to divert coolant in the first cavity to the second cavity to dissipate heat on at least a portion of the brake disc assembly.

[0006] The wheel hub assembly according to the present invention includes a first cavity within the wheel hub motor, which can contain coolant. Simultaneously, the wheel hub assembly also includes a second cavity within the brake disc assembly, connected to the first cavity by a cooling channel. This cooling channel guides the coolant from the first cavity to the second cavity. Specifically, when the wheel hub assembly is operating, the drive structure within the wheel hub motor drives the coolant to flow into the cooling channel. Under the guidance of the cooling channel, the coolant reaches the second cavity and absorbs heat from the brake disc assembly. After absorbing heat, the coolant can return to the first cavity through the cooling channel, achieving coolant recycling. The drive structure can be understood as a pump or similar structure used to drive the coolant. It is noteworthy that the route of the coolant flowing to the second cavity and the route of the coolant flowing back to the first cavity are different. This route design enables coolant recycling and reduces costs. The cooperation between the first cavity, the second cavity, and the cooling channel forms a coolant circulation loop. The coolant flowing in the circulation loop can carry away the heat transferred from the brake disc assembly to the second cavity. The wheel hub assembly exchanges heat with the coolant in the second cavity, thereby achieving heat dissipation for the brake disc assembly. Compared with the traditional air-cooling method, the heat dissipation method of the present invention has a better heat dissipation effect, ensuring the braking performance of the brake disc assembly and improving vehicle safety.

[0007] According to one embodiment 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 disposed inside the brake disc body around the center of the brake disc body. The transmission mechanism is disposed on the side of the brake disc body opposite to the hub motor, and a cooling channel is formed on the transmission mechanism. The two ends of the cooling channel are respectively connected to the first cavity and the second cavity.

[0008] According to one embodiment of the present invention, the transmission mechanism includes a rotating shaft and a bushing. One end of the rotating shaft is connected to the brake disc body. The bushing has an axially open receiving cavity, which is adapted to accommodate at least a portion of the rotating shaft. The rotating shaft is rotatable relative to the bushing. The rotating shaft has a first inlet channel and a first outlet channel communicating with a second cavity. The bushing has a second inlet channel and a second outlet channel communicating with the first cavity and extending into the receiving cavity. The first outlet channel and the second outlet channel communicate and are configured as at least a portion of the cooling channel. The first inlet channel and the second inlet channel communicate and are configured as at least another portion of the cooling channel.

[0009] According to one embodiment of the present invention, the outlet of the second inlet channel is disposed on the end wall or peripheral wall of the receiving cavity; the inlet of the second outlet channel is disposed on the end wall or peripheral wall of the receiving cavity.

[0010] According to one embodiment of the present invention, the inner peripheral wall of the receiving cavity is provided with a first groove and a second groove, the first groove and the second groove being spaced apart in the axial direction, wherein the first groove communicates with the outlet of the second inlet channel and is directly opposite to the inlet of the first inlet channel in the radial direction of the rotation axis; the second groove communicates with the inlet of the second outlet channel and is directly opposite to the outlet of the first outlet channel in the radial direction of the rotation axis.

[0011] According to one embodiment of the present invention, the end wall of the receiving cavity is provided with a first groove and a second groove. The first groove and the second groove are 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.

[0012] According to one embodiment of the present invention, the rotating shaft includes a shaft portion and a disc portion. The shaft portion is housed within the receiving cavity, and the outer periphery of the shaft portion forms an inlet for the first inlet channel and an outlet for the first outlet channel. The disc portion is connected to the shaft portion and disposed on the radial inner periphery of the brake disc body, and the radial outer periphery of the disc portion forms an outlet for the first inlet channel and an inlet for the first outlet channel. The outlet for the first inlet channel and the inlet for the first outlet channel are respectively connected to the second cavity.

[0013] According to one embodiment of the present invention, the wheel hub assembly further includes a steering knuckle disposed on the side of the transmission mechanism opposite to the brake disc body, the transmission mechanism being connected to the wheel hub motor.

[0014] According to one embodiment of the present invention, the wheel hub assembly further includes an end cap disposed on the side of the steering knuckle opposite to the transmission mechanism, at least a portion of the end cap passing through the steering knuckle and abutting against the transmission mechanism.

[0015] According to one embodiment of the present invention, the end cap is formed with a third inlet channel and a third outlet channel that communicate with the first cavity and extend axially, the third inlet channel communicating with the second inlet channel and the third outlet channel communicating with the second outlet channel.

[0016] According to one embodiment of the present invention, the hub assembly further includes two connecting pipes, which respectively connect the third inlet channel and the third outlet channel to the first cavity.

[0017] The vehicle according to the present invention is briefly described below.

[0018] The vehicle according to the present invention includes the wheel hub assembly of the above embodiments. Since the vehicle according to the present invention is provided with the wheel hub assembly of the above embodiments, during vehicle operation, the wheel hub assembly can guide the coolant in the first cavity to the second cavity through the cooling channel to achieve heat dissipation of the brake disc assembly. Moreover, the coolant can circulate in the first cavity, the second cavity and the cooling channel, which improves the heat dissipation effect of the brake disc assembly, ensures the braking performance of the vehicle, and thus improves the safety of the vehicle.

[0019] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0020] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0021] Figure 1 This is an exploded view of a wheel hub assembly according to an embodiment of the present invention;

[0022] Figure 2 This is a structural diagram of a wheel hub assembly according to an embodiment of the present invention;

[0023] Figure 3 This is an assembly drawing of a steering knuckle and an end cap according to an embodiment of the present invention;

[0024] Figure 4 This is a cross-sectional view of a bushing according to an embodiment of the present invention;

[0025] Figure 5 This is a cross-sectional view of a rotating shaft according to an embodiment of the present invention;

[0026] Figure 6 This is a cross-sectional view of an end cap according to an embodiment of the present invention;

[0027] Figure 7 This is a cross-sectional view of the bushing and rotating shaft assembled according to an embodiment of the present invention.

[0028] Figure label:

[0029] Wheel assembly 1;

[0030] 11. Hub motor; 12. Brake disc body; 13. Transmission mechanism;

[0031] Rotating shaft 131, first inlet channel 1311, first outlet channel 1312, shaft portion 1313, disk portion 1314;

[0032] Bushing 132, receiving cavity 1321, first groove 1322, second groove 1323, second inlet channel 1324, second outlet channel 1325;

[0033] Steering knuckle 14, end cap 15, third inlet channel 151, third outlet channel 152, connecting pipe 16. Detailed Implementation

[0034] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0035] The brake disc is a key structure that provides braking force to a vehicle. The heat dissipation of the brake disc affects the vehicle's braking performance. In the current technology, brake discs are usually cooled by air. However, when the hub motor is installed at the wheel end of the vehicle, the heat from the motor will affect the air cooling effect of the brake disc. Insufficient heat dissipation of the brake disc will affect the vehicle's braking performance and pose a safety hazard.

[0036] The following is for reference. Figures 1-7 A wheel hub assembly according to an embodiment of the present invention is described.

[0037] The wheel hub assembly 1 according to the present invention includes a wheel hub motor 11 and a brake disc assembly. A first cavity is formed in the wheel hub motor 11. A second cavity and a cooling channel communicating between the second cavity and the first cavity are formed in the brake disc assembly. The cooling channel is adapted to guide the coolant in the first cavity to the second cavity to dissipate heat on at least a portion of the brake disc assembly.

[0038] According to the present invention, the wheel hub assembly 1 has a first cavity inside the wheel hub motor 11, which can contain coolant. Simultaneously, the wheel hub assembly 1 also has a second cavity inside the brake disc assembly, and the second cavity is connected to the first cavity by constructing a cooling channel. The cooling channel can guide the coolant in the first cavity to the second cavity. Specifically, when the wheel hub assembly 1 is working, the drive structure inside the wheel hub motor 11 can drive the coolant to flow into the cooling channel. Under the guidance 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 drive structure can be understood as a structure such as an oil pump used to drive the coolant. It is worth noting that the coolant flows to the second chamber via a different route than it flows back to the first chamber. This coolant route design enables coolant recycling, reducing costs. The cooperation between the first and second chambers and the cooling channels forms a coolant circulation loop. The coolant flowing in this loop carries away the heat transferred from the brake disc assembly to the second chamber. The wheel hub assembly 1 achieves heat dissipation for the brake disc assembly through heat exchange with the coolant in the second chamber. Compared to traditional air-cooling methods, the heat dissipation method of this invention has better cooling performance, ensuring the braking performance of the brake disc assembly and improving vehicle safety.

[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 a hub motor 11. A second cavity is formed on the brake disc body 12, and the second cavity is disposed inside the brake disc body 12 around the center of the brake disc body 12. The transmission mechanism 13 is disposed on the side of the brake disc body 12 away from the 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] Because the brake disc assembly contains cooling channels and a second cavity, its construction affects the flow of coolant. The brake disc assembly includes a brake disc body 12 and a transmission mechanism 13. The brake disc body 12 is the structure used by the vehicle to provide braking force, while the transmission mechanism 13 is used to construct the cooling channels. A second cavity is formed within the brake disc body 12, and the cooling channels connect the second cavity to the first cavity. After passing through the cooling channels, coolant can enter the second cavity and undergo heat exchange within it to reduce the heat of the brake disc body 12. Notably, the second cavity can be constructed as an annular cavity surrounding the center of the brake disc body 12. This design increases the area for heat exchange, 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 bushing 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 bushing 132. The bushing 132 has an axially open receiving cavity 1321, which is adapted to receive at least a portion of the rotating shaft 131. The rotating shaft 131 is rotatable relative to the bushing 132. The rotating shaft 131 has a first inlet channel 1311 and a first outlet channel 1312 communicating with a second cavity. The bushing 132 has a second inlet channel 1324 and a second outlet channel 1325 communicating with the first cavity and extending into the receiving cavity 1321. The first outlet channel 1312 and the second outlet channel 1325 are connected and configured as at least a portion of the cooling channels. The first inlet channel 1311 and the second inlet channel 1324 are connected and configured as at least another portion of the cooling channels.

[0043] Because a cooling channel is formed within the transmission mechanism 13, the structure of the transmission mechanism 13 affects the design of the cooling channel. The transmission mechanism 13 includes a bushing 132 and a rotating shaft 131, wherein the rotating shaft 131 is connected to the brake disc body 12, and during operation, the rotating shaft 131 can rotate synchronously with the brake disc body 12. A bushing 132 is provided at the end of the rotating shaft 131 away from the brake disc body 12, and an axially open receiving cavity 1321 is formed on the bushing 132. During assembly, at least a portion of the rotating shaft 131 can be accommodated within the receiving cavity 1321 and can rotate relative to the bushing 132. The provision of the receiving cavity 1321 can improve the stability when the rotating shaft 131 rotates relative to the bushing 132.

[0044] Furthermore, 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 bushing 132. When the rotating shaft 131 and the bushing 132 are assembled, the first inlet channel 1311 and the second inlet channel 1324 cooperate to form at least a portion of the cooling channel and connect the first cavity and the second cavity. The first outlet channel 1312 and the second outlet channel 1325 cooperate to form at least another portion of the cooling channel and connect the second cavity and the first cavity. Specifically, the flow path 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. After heat exchange in the second cavity, the coolant 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 transmission mechanism 13 is designed to allow for the recycling of coolant, which saves costs while continuously dissipating heat from the brake disc body 12, thus 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 receiving cavity 1321; the inlet of the second outlet channel 1325 is disposed on the end wall or peripheral wall of the receiving cavity 1321. Specifically, the bushing 132 disposeds the outlet of the second inlet channel 1324 on the peripheral wall of the receiving cavity 1321, and the bushing 132 also disposeds the inlet of the second outlet channel 1325 on the peripheral wall of the receiving cavity 1321. It is worth noting that the projections of the inlet of the second outlet channel 1325 and the outlet of the second inlet channel 1324 on the bushing 132 are misaligned. 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, ensuring that the coolant can be circulated normally.

[0046] According to one embodiment of the present invention, the inner peripheral wall of the receiving cavity 1321 is provided with a first groove 1322 and a second groove 1323, the first groove 1322 and the second groove 1323 being spaced apart in the axial direction, wherein the first groove 1322 communicates with the outlet of the second inlet channel 1324 and is directly opposite to the inlet of the first inlet channel 1311 in the radial direction of the rotation axis 131; the second groove 1323 communicates with the inlet of the second outlet channel 1325 and is directly opposite to the outlet of the first outlet channel 1312 in the radial direction of the rotation axis 131.

[0047] Since at least a portion of the rotating shaft 131 is housed within the receiving cavity 1321, the construction of the receiving cavity 1321 affects the flow of coolant between the bushing 132 and the rotating shaft 131. The inner peripheral wall of the receiving cavity 1321 is provided with a first groove 1322 and a second groove 1323, which are axially spaced apart. 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 bushing 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. The connection 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 rotation shaft 131. Similarly, the connection between the outlet of the first outlet channel 1312 and the second groove 1323 can also 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 rotation shaft 131. When the rotation shaft 131 rotates within the receiving cavity 1321, the inlet of the first inlet channel 1311, which is directly opposite the first groove 1322 in the radial direction, can always maintain a connection with the outlet of the second inlet channel 1324. Likewise, the outlet of the first outlet channel 1312, which is directly opposite the second groove 1323 in the radial direction, can always maintain a connection with the inlet of the second outlet channel 1325.

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

[0049] According to one embodiment of the present invention, the end wall of the receiving cavity 1321 is provided with a first groove 1322 and a second groove 1323. The first groove 1322 and the second groove 1323 are two annular grooves with the same center and different radii. The first groove 1322 is connected to 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. The second groove 1323 is connected to 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 housed within the receiving cavity 1321, the construction of the receiving cavity 1321 affects the flow of coolant between the bushing 132 and the rotating shaft 131. A first groove 1322 and a second groove 1323 are provided on the end wall of the receiving cavity 1321. The first groove 1322 and the second groove 1323 form annular grooves with the same center but different radii on the end wall of the receiving cavity 1321. Simultaneously, 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. Alternatively, the outlet of the second inlet channel 1324 can be understood as being located within the first groove 1322, and the inlet of the second outlet channel 1325 is located within the second groove 1323. When the rotating shaft 131 extends into the receiving 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 remains in constant communication with the first groove 1322, and similarly, the first outlet channel 1312 remains in constant communication with the second groove 1323. The arrangement of the first groove 1322 and the second groove 1323 avoids interference between the reciprocating paths of the coolant during circulation, ensuring the circulating flow 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 housed in a receiving cavity 1321. The outer periphery of the shaft portion 1313 forms 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 disposed on the radial inner periphery of the brake disc body 12. The radial outer periphery of the disc portion 1314 forms an outlet of the first inlet channel 1311 and an inlet of the first outlet channel 1312. The outlet of the first inlet channel 1311 and the inlet of the first outlet channel 1312 are respectively connected to a second cavity.

[0052] Since the rotating shaft 131 enables the mutual flow of coolant between the bushing 132 and the brake disc body 12, its construction affects the coolant flow. The rotating shaft 131 comprises a shaft portion 1313 and a disc portion 1314. The shaft portion 1313 is housed within a receiving cavity 1321, and an inlet for the first inlet channel 1311 and an outlet for the first outlet channel 1312 are formed on its outer periphery. The design of the shaft portion 1313 ensures the flow of coolant between the bushing 132 and the rotating shaft 131. The disc portion 1314 is connected to the shaft portion 1313 and disposed on the radial inner periphery of the brake disc body 12, improving the flow between the rotating shaft 131 and the brake disc body. To ensure the stability of the connection of body 12, the outer periphery of disc 1314 is provided with an outlet of first inlet channel 1311 and an inlet of first outlet channel 1312 that communicate with the second cavity. The design of the outlet of first inlet channel 1311 and the inlet of first outlet channel 1312 allows coolant to flow into or out of the second cavity in the radial direction. Compared with flow in other directions, the flow efficiency of coolant in the radial direction is higher because disc 1314 and brake disc body 12 rotate synchronously.

[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 opposite to 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 affects the stability of the engagement between the transmission mechanism 13 and the brake disc body 12. By providing a steering knuckle 14 on the side of the transmission mechanism 13 opposite to the brake disc body 12, and connecting the steering knuckle 14 to the wheel hub motor 11, it can axially abut against the transmission mechanism 13, thereby improving the stability of the engagement 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 opposite to 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 also has an end cap 15 on the side of the steering knuckle 14 opposite to 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 fixed to the steering knuckle 14 by 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, which communicate with the first cavity and extend axially, are formed on the end cap 15. 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. Since the communication between the cooling channels and the first cavity is affected by the steering knuckle 14 and the end cap 15 after the wheel hub assembly 1 is assembled, the wheel hub assembly 1 has an axially extending third inlet channel 151 and third outlet channel 152 on the end cap 15. The third inlet channel 151 and the third outlet channel 152 respectively communicate the second inlet channel 1324 and the second outlet channel 1325 with the first cavity, thus realizing the normal flow of coolant.

[0056] According to one embodiment of the present invention, the wheel hub assembly 1 further includes two connecting pipes 16, which respectively connect the third inlet channel 151 and the third outlet channel 152 to the first cavity. The wheel hub assembly 1 has two connecting pipes 16 disposed outside the brake disc assembly, which respectively connect the third inlet channel 151 and the third outlet channel 152 to the first cavity. The arrangement of the connecting pipes 16 facilitates the flow of cooling between the first cavity and the transmission mechanism 13. Simultaneously, the external placement of the connecting pipes 16 on the brake disc assembly prevents interference between the connecting pipes 16 and the brake disc assembly during operation, thus improving the safety of the wheel hub assembly 1.

[0057] In some embodiments, the wheel hub assembly 1 may also include a heat dissipation structure for cooling within the wheel hub motor 11. This heat dissipation structure may be a radiator, heat sink, or other type of heat dissipation structure. After the coolant flows back to the first chamber, the coolant carrying heat can be cooled by the heat dissipation structure, so that the coolant recirculated into the second chamber is at a low temperature, which can further improve the heat dissipation effect of the wheel hub assembly 1.

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

[0059] The vehicle according to the present invention includes the wheel hub assembly 1 in the above embodiments. Since the vehicle according to the present invention is provided with the wheel hub assembly 1 in the above embodiments, during vehicle operation, the wheel hub assembly 1 can guide the coolant in the first cavity to the second cavity through the cooling channel to achieve heat dissipation of the brake disc assembly. Moreover, the coolant can circulate in the first cavity, the second cavity and the cooling channel, which improves the heat dissipation effect of the brake disc assembly, ensures the braking performance of the vehicle, and thus improves the safety of the vehicle.

[0060] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0061] In the description of this invention, "first feature" and "second feature" may include one or more of the features.

[0062] In the description of this invention, "a plurality of" means two or more.

[0063] In the description of this invention, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or it may include the first and second features not being in direct contact but being in contact through another feature between them.

[0064] In the description of this invention, the terms "above," "over," and "on top" for the first feature and the second feature include the first feature being directly above or diagonally above the second feature, or simply indicating that the first feature is at a higher horizontal level than the second feature.

[0065] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0066] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A wheel hub assembly, characterized in that, include: A hub motor, wherein a first cavity is formed inside the hub motor; A brake disc assembly having a second cavity and a cooling channel connecting the second cavity and a first cavity, the cooling channel being adapted to divert coolant from the first cavity to the second cavity to dissipate heat from at least a portion of the brake disc assembly. The brake disc assembly includes: A brake disc body is connected to the hub motor. A second cavity is formed on the brake disc body, and the second cavity is disposed inside the brake disc body around the center of the brake disc body. A transmission mechanism is provided on the side of the brake disc body away from the hub motor. 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.

2. The wheel hub assembly according to claim 1, characterized in that, The transmission mechanism includes: A rotating shaft, one end of which is connected to the brake disc body. A bushing having an axially open receiving cavity adapted to receive at least a portion of the rotating shaft, the rotating shaft being rotatable relative to the bushing, wherein... The rotating shaft has a first inlet channel and a first outlet channel that communicate with the second cavity. The bushing has a second inlet channel and a second outlet channel that communicate with the first cavity and extend into the receiving cavity. The first outlet channel and the second outlet channel are connected and configured as at least part of the cooling channel. The first inlet channel and the second inlet channel are connected and configured as at least another part of the cooling channel.

3. The wheel hub assembly according to claim 2, characterized in that, The outlet of the second inlet channel is located on the end wall or peripheral wall of the receiving cavity; the inlet of the second outlet channel is located on the end wall or peripheral wall of the receiving cavity.

4. The wheel hub assembly according to claim 3, characterized in that, The inner peripheral wall of the receiving cavity is provided with a first groove and a second groove, which are spaced apart axially. 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 the first groove in the radial direction of the rotating shaft. The second groove is connected to the inlet of the second outlet channel and the outlet of the first outlet channel, and the outlet of the first outlet channel is directly opposite the second groove in the radial direction of the rotation axis.

5. The wheel hub assembly according to claim 3, characterized in that, The end wall of the receiving cavity is provided with a first groove and a second groove, wherein the first groove and the second groove are configured as two annular grooves with the same center but 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.

6. The wheel hub assembly according to claim 4 or 5, characterized in that, The rotating shaft includes: A shaft portion is housed within the receiving cavity, and the outer periphery of the shaft portion forms an inlet for the first inlet channel and an outlet for the first outlet channel; The disc portion is connected to the shaft portion and disposed on the radial inner circumference of the brake disc body. The radial outer circumference of the disc portion forms the outlet of the first inlet channel and the 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.

7. The wheel hub assembly according to claim 2, characterized in that, Also includes: A steering knuckle is disposed on the side of the transmission mechanism opposite to the brake disc body, and the transmission mechanism is connected to the hub motor.

8. The wheel hub assembly according to claim 7, characterized in that, Also includes: An end cap is disposed on the side of the steering knuckle opposite to the transmission mechanism, and at least a portion of the end cap passes through the steering knuckle and abuts against the transmission mechanism.

9. The wheel hub assembly according to claim 8, characterized in that, The end cap has a third inlet channel and a third outlet channel that are connected to the first cavity and extend axially. The third inlet channel is connected to the second inlet channel, and the third outlet channel is connected to the second outlet channel.

10. The wheel hub assembly according to claim 9, characterized in that, Also includes: The connecting pipe is constructed in two parts, and the two connecting pipes respectively connect the third inlet channel and the third outlet channel to the first cavity.

11. A vehicle, characterized in that, Includes the wheel hub assembly as described in any one of claims 1-10.

Images