Hub motor cooling structure and automobile

Abstract

The utility model provides a hub motor cooling structure and an automobile, and relates to the field of automobile design and manufacturing. The hub motor cooling structure comprises a bogie assembly, a first connecting rod assembly, a hub motor assembly and a second connecting rod assembly. A first cooling channel is formed in the hub motor assembly; second cooling channels are formed in the first connecting rod assembly and the second connecting rod assembly; the bogie assembly is provided with two third cooling channels which are arranged at intervals in the X direction; one end of each second cooling channel is communicated with the corresponding third cooling channel in the X direction, and the other end of each second cooling channel is communicated with the first cooling channel, so that a cooling medium channel is formed jointly. According to the hub motor cooling structure provided by the utility model, the arrangement space of the cooling pipeline can be greatly saved, the cooling pipeline is prevented from being exposed on the wheel edge and interfering with peripheral parts, the cooling reliability is effectively improved, and the complexity and the cost of a vehicle structure are reduced at the same time.

Description

Technical Field

[0001] This utility model relates to the field of automobile design and manufacturing, and in particular to a hub motor cooling structure and an automobile. Background Technology

[0002] In cars driven by hub motors, the hub motors are generally located inside the wheels. Cooling pipes, high-voltage wiring harnesses, brake hoses, and suspension linkages need to be installed between the car body and the wheels to connect the hub motors so that the hub motors can perform steering, driving, and braking functions.

[0003] To ensure efficient heat dissipation, in-wheel motors typically employ liquid cooling. This involves circulating coolant through coolant channels within the in-wheel motor and external cooling pipes connected to these channels, thus removing the heat generated by the motor. However, the cooling pipes connected to the in-wheel motor are generally external and independent of the suspension links between the vehicle body and wheels. They require dedicated space in the already limited area between the vehicle body and wheels, making the layout of the cooling pipes extremely difficult. Furthermore, the movement of the in-wheel motor causes the cooling pipes to bounce, making them prone to interference with surrounding components. Located near the wheel, the cooling pipes operate in harsh environments, susceptible to scratches from stones, mud, snow, and other external objects. Therefore, additional protective measures are needed to ensure cooling reliability, resulting in increased complexity and cost in the vehicle structure.

[0004] In view of the above, this utility model is hereby proposed. Utility Model Content

[0005] This utility model provides a hub motor cooling structure and automobile, aiming to solve the problems of external cooling pipes in the prior art, which require independent space between the vehicle body and the wheels, are prone to interference with surrounding components and are susceptible to scratches from external objects, resulting in complex vehicle structure and high cost.

[0006] This utility model provides a hub motor cooling structure, including: a bogie assembly, a first connecting rod assembly, a hub motor assembly, and a second connecting rod assembly; a first cooling channel is formed within the hub motor assembly; the first connecting rod assembly and the second connecting rod assembly are arranged at intervals along the X direction, and each has a second cooling channel formed inside; one end of the first connecting rod assembly and the second connecting rod assembly are respectively connected to the hub motor assembly; the bogie assembly is arranged between the first connecting rod assembly and the second connecting rod assembly along the X direction, and is respectively connected to the other end of the first connecting rod assembly and the second connecting rod assembly; the bogie assembly forms two third cooling channels arranged at intervals along the X direction; wherein one end of each second cooling channel is connected to the corresponding third cooling channel along the X direction, and the other end is connected to the first cooling channel, so as to jointly form a cooling medium passage.

[0007] In some embodiments, the hub motor cooling structure further includes an inlet pipe and an outlet pipe, which are arranged at intervals along the X direction between two third cooling channels and are respectively connected to and communicate with the corresponding third cooling channels.

[0008] In some embodiments, the hub motor cooling structure further includes multiple hollow bolts; the two ends of the first connecting rod assembly or the second connecting rod assembly are respectively connected to the bogie assembly and the hub motor assembly by hollow bolts; one end of the hollow bolt forms an auxiliary channel, and the hollow bolt extends at least partially into the second cooling channel, so that the auxiliary channel is connected to the second cooling channel.

[0009] In some embodiments, both the first and second connecting rod assemblies include a connecting rod body and a bushing assembly; the connecting rod body extends along the X direction, and a first channel is formed within the connecting rod body, with a first mounting portion and a second mounting portion respectively provided at both ends of the first channel; a bushing assembly is press-fitted into both the first and second mounting portions, the bushing assembly in the first mounting portion being used to connect to the hub motor assembly, and the bushing assembly in the second mounting portion being used to connect to the bogie assembly; the bushing assembly forms a second channel, and the second channel communicates with the first channel to jointly form a second cooling channel; each hollow bolt is at least partially located within the second channel to abut against the bogie assembly or the hub motor assembly; an auxiliary channel communicates with the first channel, and the second channel communicates with the third cooling channel or the first cooling channel.

[0010] In some embodiments, the bushing assembly includes an inner bushing tube, a bushing body, and an outer bushing tube connected sequentially from the inside to the outside; the inner bushing tube has an axially formed mounting through hole for at least part of a hollow bolt to be inserted; the inner bushing tube has at least one first sub-through hole radially connected to the mounting through hole; the bushing body has at least one second sub-through hole radially; the outer bushing tube is press-fitted into a first mounting portion or a second mounting portion and has at least one third sub-through hole radially; the at least one first sub-through hole, the second sub-through hole, and the third sub-through hole are radially connected to form a second channel together with the mounting through hole.

[0011] In some embodiments, the inner walls of the first mounting portion and the second mounting portion are formed with liquid collection grooves, which are in communication with the first channel.

[0012] In some embodiments, each hollow bolt includes an end flange and a hollow threaded rod, with an auxiliary channel formed inside the hollow threaded rod. The auxiliary channel has an auxiliary through hole that connects to the first sub-through hole in the radial direction.

[0013] In some embodiments, the hub motor assembly has two bushing mounting portions arranged at intervals along the X direction on one side along the Y direction; each bushing mounting portion includes a lug and a first bushing abutment portion arranged at intervals, the first bushing abutment portion having a first threaded hole, the lug having a mounting hole aligned with the first threaded hole, the first threaded hole communicating with one end of a first cooling channel; the first mounting portion is arranged between the lug and the first bushing abutment portion; the end flange of at least one hollow bolt abuts against the end of the lug away from the first mounting portion, and the hollow bolt passes through the mounting hole and the mounting through hole of the bushing inner tube in the first mounting portion in sequence, and then is screwed into the first threaded hole, so that the bushing inner tube in the first mounting portion abuts against the lug and the first bushing abutment portion.

[0014] In some embodiments, the bogie assembly includes a bogie body and two connecting joints; the bogie body has two second bushing abutment portions arranged at intervals along the X direction, each second bushing abutment portion having a second threaded hole at one end and a mounting cavity communicating with the second threaded hole at the other end; each connecting joint has a connecting channel, one end of each connecting joint being arranged in each mounting cavity, the connecting channel and the second threaded hole together forming a third cooling channel; the other end of each connecting joint is sleeved with an inlet pipe or an outlet pipe; the inner tube of the bushing in the second mounting portion is connected to the end of the second bushing abutment portion having the second threaded hole; the end flange of at least one hollow bolt abuts against the end of the inner tube of the bushing in the second mounting portion away from the second threaded hole, and the hollow bolt passes through the mounting through hole of the inner tube of the bushing in the second mounting portion and is screwed into the second threaded hole, so that both ends of the inner tube of the bushing in the second mounting portion abut against the end flange and the second bushing abutment portion respectively.

[0015] In some embodiments, the hub motor cooling structure also includes a rubber sealing ring and a copper gasket; the inner tube of the bushing has grooves on both ends along the axial direction, and the rubber sealing ring is arranged in the grooves to seal the second cooling channel with the third cooling channel or the first cooling channel under the pressure of the hollow bolts; the copper gasket is arranged between the lug and at least one end flange to seal the second cooling channel with the auxiliary channel under the pressure of the hollow bolts.

[0016] This utility model also provides an automobile, including the hub motor cooling structure as described above.

[0017] This utility model provides a hub motor cooling structure and an automobile, which has at least the following advantages compared to the prior art:

[0018] The hub motor cooling structure is designed to include a bogie assembly, a first connecting rod assembly, a hub motor assembly, and a second connecting rod assembly. The hub motor assembly contains a first cooling channel, and both the first and second connecting rod assemblies have second cooling channels. The bogie assembly has two third cooling channels. The first and second connecting rod assemblies are spaced apart along the X-axis and each is connected at one end to the hub motor assembly, allowing both ends of the first cooling channel to connect to the two second cooling channels. The bogie assembly is positioned along the X-axis between the first and second connecting rod assemblies. Furthermore, it is connected to the other end of the first connecting rod assembly and the second connecting rod assembly respectively, so that the two third cooling channels are connected to the corresponding second cooling channels. Thus, the first cooling channel, as the coolant flow channel inside the hub motor assembly, can form a cooling medium passage with the two second cooling channels and the two third cooling channels, so that the cooling medium can flow from one third cooling channel through the second cooling channel and enter the first cooling channel inside the hub motor assembly to achieve cooling of the hub motor assembly, and can flow out through the other side of the second cooling channel and the other third cooling channel to circulate through the external cooling device.

[0019] Thus, in the hub motor cooling structure provided by this utility model, the bogie assembly, the first link assembly, and the second link assembly, as suspension components, not only have the function of motion guidance, but also integrate the function of cooling pipes, replacing the external layout of cooling pipes in the traditional technology. This greatly saves the space for cooling pipe layout, avoids the cooling pipes being exposed to the wheel and interfering with surrounding components, and can avoid being scratched by external objects such as stones, mud, sand, ice and snow. No additional protective measures are required, which effectively improves the cooling reliability while reducing the complexity and cost of the vehicle structure.

[0020] The hub motor cooling structure and other features and advantages of the automobile provided by this utility model will be further described in the following specific embodiments. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the specific embodiments of this application or the prior art, the accompanying drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application; those skilled in the art can obtain other drawings based on these drawings without any creative effort.

[0022] Figure 1 This is a schematic diagram of the overall structure of the hub motor cooling structure provided in the embodiments of this application;

[0023] Figure 2 This is a schematic diagram of the cooling medium flow within the hub motor cooling structure provided in this application embodiment;

[0024] Figure 3 This is a partial structural diagram of the hub motor cooling structure provided in an embodiment of this application;

[0025] Figure 4 A schematic diagram of the AA cross-section of the hub motor cooling structure provided in the embodiments of this application;

[0026] Figure 5 This is an enlarged view of part of structure B in the cross-sectional view AA provided in the embodiments of this application;

[0027] Figure 6 A partial structural cross-sectional view of the hub motor assembly provided in an embodiment of this application;

[0028] Figure 7 A partial structural cross-sectional view of the first link assembly provided in an embodiment of this application;

[0029] Figure 8 This is an enlarged view of a portion of structure C in the AA cross-sectional view provided in the embodiments of this application;

[0030] Figure 9 A schematic diagram of a car module provided in an embodiment of this application.

[0031] The attached figures are labeled as follows:

[0032] 10. Hub motor cooling structure;

[0033] 100. Liquid inlet pipe;

[0034] 200. Bogie assembly; 201. Third cooling channel; 210. Bogie body; 211. Second bushing abutment part; 211A. Second threaded hole; 211B. Mounting cavity; 220. Connecting joint; 221. Connecting channel;

[0035] 300. Hollow bolt; 301. Auxiliary channel; 310. End flange; 320. Hollow threaded rod;

[0036] 400, First connecting rod assembly; 401, Second cooling channel; 410, Connecting rod body; 411, First channel; 410A, First mounting part; 410B, Second mounting part; 412, Liquid collection groove; 402, Second channel; 420, Outer bushing tube; 421, Third sub-through hole; 430, Bushing body; 431, Second sub-through hole; 440, Inner bushing tube; 441, First sub-through hole; 442, Groove; 443, Mounting through hole;

[0037] 500. Hub motor assembly; 501. First cooling channel; 510. Bushing mounting part; 502. Lug; 503. First bushing abutment part; 512. First threaded hole; 511. Mounting hole;

[0038] 600. Second connecting rod assembly;

[0039] 700. Discharge tube;

[0040] 800, rubber sealing ring;

[0041] 900, copper washers;

[0042] 1000, Automobile. Detailed Implementation

[0043] In the description of this application, it should be understood that the use of terms such as "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" to indicate orientation or positional relationship, unless otherwise specified, is understood to be based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this application and simplifying the description, and does 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, and therefore should not be construed as a limitation of this application.

[0044] Furthermore, features specified with "first" or "second" for descriptive purposes only should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Features specified with "first" or "second" may explicitly or implicitly include at least one of the specified features. The description of "multiple" generally means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0045] In this application, unless otherwise explicitly specified and limited, terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can be a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0046] In the description of this specification, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that the specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. 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. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0047] It should be noted that the coordinate descriptions such as "X direction, Y direction, Z direction" mentioned in the description of the embodiments of this utility model are all interpreted with reference to the vehicle coordinate system, that is, the straight line where the front of the vehicle is located is the X direction, the axial direction of the front wheel is the Y direction, and the direction perpendicular to the ground is the Z direction.

[0048] As mentioned above, in the existing technology of a car 1000 driven by a hub motor, the cooling pipes connected to the hub motor for supplying coolant are externally located, requiring independent space between the vehicle body and the wheels. This makes them prone to interference with surrounding components and scratches from external objects, resulting in high vehicle structural complexity and cost. The present invention provides a hub motor cooling structure 10 that directly integrates the cooling pipes connected to the hub motor into the suspension components such as the bogie assembly 200, the first link assembly 400, and the second link assembly 600. This allows the bogie assembly 200, the first link assembly 400, and the second link assembly 600 to not only provide motion guidance but also integrate the function of cooling pipes. This saves space for cooling pipe layout, avoids interference and scratches caused by the cooling pipes being exposed to the wheel and surrounding components, eliminates the need for additional protective measures, effectively improves cooling reliability, and reduces vehicle structural complexity and cost.

[0049] Based on the above concept, and referring to Figures 1-8As shown, this utility model embodiment provides a hub motor cooling structure 10, including: a bogie assembly 200, a first connecting rod assembly 400, a hub motor assembly 500, and a second connecting rod assembly 600; a first cooling channel 501 is formed inside the hub motor assembly 500; the first connecting rod assembly 400 and the second connecting rod assembly 600 are arranged at intervals along the X direction, and each has a second cooling channel 401 formed inside; one end of the first connecting rod assembly 400 and the second connecting rod assembly 600 are respectively connected to the hub motor assembly. The bogie assembly 200 is arranged along the X direction between the first link assembly 400 and the second link assembly 600, and is connected to the other end of the first link assembly 400 and the second link assembly 600 respectively. The bogie assembly 200 forms two third cooling channels 201 arranged at intervals along the X direction. Each second cooling channel 401 has one end connected to the corresponding third cooling channel 201 along the X direction and the other end connected to the first cooling channel 501 to form a cooling medium passage.

[0050] It is understood that in this embodiment, the first link assembly 400 and the second link assembly 600 are arranged at intervals along the X direction. The first link assembly 400 and the second link assembly 600 are located in the Y direction of the hub motor assembly 500 and are both connected to the hub motor assembly, thereby connecting the two second cooling channels 401 to the first cooling channel 501 inside the hub motor assembly 500. The bogie assembly 200 is arranged within the receiving space enclosed by the first link assembly 400, the second link assembly 600, and the hub motor assembly 500. Both the first link assembly 400 and the second link assembly 600 are connected to the bogie assembly 200, thereby connecting the two second cooling channels 401 to the first cooling channel 501 inside the hub motor assembly 500. 01 corresponds to the two third cooling channels 201 on the bogie assembly 200 respectively; thus, the first cooling channel 501, the two second cooling channels 401 and the two third cooling channels 201 together form a cooling medium passage. The cooling medium (i.e., coolant) can enter the first cooling channel 501 in the hub motor assembly 500 through one third cooling channel 201 on the bogie assembly 200, pass through one second cooling channel 401, and then carry away heat. Afterwards, it flows out through another second cooling channel 401 and another third cooling channel 201 on the bogie assembly 200, thereby realizing the cooling and heat dissipation of the hub motor assembly 500.

[0051] For example, refer to Figure 2 As shown, the arrows on the hub motor cooling structure 10 indicate the direction of coolant flow; Figure 2In this process, the coolant can enter through a third cooling channel 201 on the bogie assembly 200, then pass through the second cooling channel 401 of the first connecting rod assembly 400 and enter the first cooling channel 501 in the hub motor assembly 500. Subsequently, it flows out after passing through the second cooling channel 401 on the second connecting rod assembly 600 and another third cooling channel 201 on the bogie assembly 200.

[0052] Therefore, the bogie assembly 200, the first link assembly 400 and the second link assembly 600 can not only serve as connecting structural components between the bogie of the integrated angle module vehicle (or the body of the traditional vehicle) and the hub motor, but also deliver coolant internally, partially replacing the cooling pipes, saving layout space. At the same time, the cooling pipes are no longer exposed at the wheel edge, which can avoid being scratched by stones, mud, snow and ice, and significantly increase the cooling reliability of the hub motor.

[0053] refer to Figure 1 and Figure 2 As shown, in order to facilitate the connection of the cooling medium passage of the hub motor cooling structure 10 to an external cooling circulation device, in some embodiments, the hub motor cooling structure 10 further includes an inlet pipe 100 and an outlet pipe 700. The inlet pipe 100 and the outlet pipe 700 are arranged at intervals along the X direction between two third cooling channels 201 and are respectively connected to and communicate with the corresponding third cooling channels 201. Thus, the external cooling circulation device can be respectively connected to and communicate with the inlet pipe 100 and the outlet pipe 700 to realize the inflow and outflow of coolant in the cooling medium passage of the hub motor cooling structure 10.

[0054] In this embodiment, as Figure 2 As shown, the inlet pipe 100 can be connected to the third cooling channel 201 on one side of the first connecting rod assembly 400, and the outlet pipe 700 can be connected to the third cooling channel 201 on one side of the second connecting rod assembly 600. In this case, the coolant enters through the inlet pipe 100 and flows into the first cooling channel 501 inside the hub motor assembly 500 through the second cooling channel 401 of the first connecting rod assembly 400. Then, it flows out through the second cooling channel 401 of the second connecting rod assembly 600, the corresponding connected third cooling channel 201, and the outlet pipe 700. In some embodiments not shown, the inlet pipe 100 can also be connected to the third cooling channel 201 on one side of the second connecting rod assembly 600. In this case, the outlet pipe 700 can be connected to the third cooling channel 201 on one side of the first connecting rod assembly 400. The flow direction of the coolant into the first cooling channel 501 inside the hub motor assembly 500 is opposite to that described above. Both methods can achieve cooling and heat dissipation of the hub motor assembly 500.

[0055] It should be noted that the first link assembly 400 and the second link assembly 600 in this embodiment of the present invention are symmetrical to each other based on the bogie assembly 200. The connection parts of the first link assembly 400 and the second link assembly 600 with the hub motor assembly 500 and the bogie assembly 200 are all symmetrically designed. Therefore, this embodiment of the present invention mainly focuses on the design of one side of the first link assembly 400. The specific structural design of the second link assembly 600 (not shown) is the same as that of the first link assembly 400 and will not be described again.

[0056] Continue to refer to Figures 3-8 To improve the connection stability of the first link assembly 400 or the second link assembly 600, in some embodiments, the hub motor cooling structure 10 further includes a plurality of hollow bolts 300; the two ends of the first link assembly 400 or the second link assembly 600 are respectively connected to the bogie assembly 200 and the hub motor assembly 500 via hollow bolts 300; one end of the hollow bolt 300 forms an auxiliary channel 301 (see reference). Figure 5 As shown), the hollow bolt 300 extends at least partially into the second cooling channel 401, so that the auxiliary channel 301 is connected to the second cooling channel 401.

[0057] In this embodiment, the hollow bolt 300 is hollow inside and closed at one end, while the other end has an opening, thus forming an auxiliary channel 301. A hollow bolt 300 is respectively disposed at both ends of the first connecting rod assembly 400 or the second connecting rod assembly 600. When the two ends of the first connecting rod assembly 400 or the second connecting rod assembly 600 are respectively connected to the bogie assembly 200 and the hub motor assembly 500, the open ends of the two hollow bolts 300 extend into the second cooling channels at both ends of the first connecting rod assembly 400 or the second connecting rod assembly 600. Inside 401, it is screwed to the corresponding bogie assembly 200 or hub motor assembly 500 to secure both ends of the first link assembly 400 or the second link assembly 600 to the corresponding bogie assembly 200 or hub motor assembly 500. At the same time, the auxiliary channel 301 is connected to the second cooling channel 401, so that after the first link assembly 400 or the second link assembly 600 is assembled, their respective second cooling channels 401 can be connected to the corresponding first cooling channel 501 or third cooling channel 201 through the auxiliary channel 301.

[0058] In some embodiments, both the first connecting rod assembly 400 and the second connecting rod assembly 600 include a connecting rod body 410 and a bushing assembly (not labeled); the connecting rod body 410 extends along the X direction, and a first channel 411 is formed within the connecting rod body 410. A first mounting portion 410A and a second mounting portion 410B are respectively provided at both ends of the first mounting portion 410A and the second mounting portion 410B; a bushing assembly is press-fitted into both the first mounting portion 410A and the second mounting portion 410B. The bushing assembly in the first mounting portion 410A is used to connect to the hub motor assembly 500, and the second mounting portion 410B... The bushing assembly within the mounting section 410B is used to connect the bogie assembly 200; the bushing assembly forms a second channel 402, and the second channel 402 communicates with the first channel 411 to jointly form a second cooling channel 401; each hollow bolt 300 is at least partially located within the second channel 402 for abutting the bushing assembly against the bogie assembly 200 or the hub motor assembly 500; the auxiliary channel 301 communicates with the first channel 411, and the second channel 402 communicates with the third cooling channel 201 or the first cooling channel 501.

[0059] Taking the first link assembly 400 side as an example, refer to Figure 4 and Figure 7 As shown, the connecting rod body 410 extends along the X direction. The connecting rod body 410 is hollow inside and forms a first channel 411 with a circular cross-section. A first mounting part 410A and a second mounting part 410B are respectively provided at both ends of the first channel 411. The first mounting part 410A and the second mounting part 410B are symmetrical to each other. Both the first mounting part 410A and the second mounting part 410B form a receiving cavity that communicates with the first channel 411. The bushing assembly is press-fitted into the receiving cavity. The bushing assembly forms a second channel 402 that communicates with the first channel 411. One end of the hollow bolt 300, which forms an auxiliary channel 301, passes through the second channel 402 and is screwed to the corresponding bogie assembly 200 or hub motor assembly 500. The bushing assembly in the first mounting part 410A or the second mounting part 410B abuts against the bogie assembly 200 or the hub motor assembly 500, thereby achieving a stable connection between the first connecting rod assembly 400 and the second connecting rod assembly 600.

[0060] In addition, the auxiliary channel 301 can be designed with an opening in the radial direction to extend into the second channel 402 and then communicate with the first channel 411 through the second channel 402. The second channel 402 can be connected with the third cooling channel 201 or the first cooling channel 501 by means of the auxiliary channel 301.

[0061] In this embodiment, the bushing assembly can be made of elastic materials such as rubber, so as to facilitate an interference fit with the first mounting part 410A or the second mounting part 410B during the pressing process. Furthermore, after the end of the bushing assembly abuts against an adjacent component designed with a coolant channel, it is more conducive to achieving a seal between the channel in the adjacent component and the external environment.

[0062] Specifically, the bushing assembly includes an inner bushing tube 440, a bushing body 430, and an outer bushing tube 420 connected sequentially from the inside to the outside. The inner bushing tube 440 has an axially formed mounting through hole 443 for at least part of the hollow bolt 300 to be inserted. The inner bushing tube 440 has at least one first sub-through hole 441 that communicates with the mounting through hole 443 in the radial direction. The bushing body 430 has at least one second sub-through hole 431 in the radial direction. The outer bushing tube 420 is press-fitted into a first mounting part 410A or a second mounting part 410B and has at least one third sub-through hole 421 in the radial direction. The at least one first sub-through hole 441, the second sub-through hole 431, and the third sub-through hole 421 communicate radially to form a second channel 402 together with the mounting through hole 443.

[0063] The inner bushing tube 440, bushing body 430, and outer bushing tube 420 can all be made of rubber and are connected by vulcanization to form a bushing assembly. The axial mounting through hole 443 formed in the inner bushing tube 440 is adapted to the hollow bolt 300 so that the open end of the hollow bolt 300 can pass through and be screwed to the bogie assembly 200 or the hub motor assembly 500. The first sub-through hole 441 of the inner bushing tube 440, the second sub-through hole 431 of the bushing body 430, and the third sub-through hole 421 of the outer bushing tube 420 are radially aligned and all communicate with the mounting through hole 443 to form a second channel 402. The auxiliary channel of the hollow bolt 300 can communicate with the first channel 411 through the first sub-through hole 441, the second sub-through hole 431, and the third sub-through hole 421.

[0064] In some embodiments, the inner walls of the first mounting portion 410A and the second mounting portion 410B are both formed with annular liquid collection grooves 412, and the liquid collection grooves 412 are connected to the first channel 411.

[0065] After the bushing outer tube 420 is press-fitted into the first mounting part 410A or the second mounting part 410B, the third sub-through hole 421 is radially opposite to the first channel 411 in the liquid collecting groove 412 and communicates with the first channel 411 through the liquid collecting groove 412 to reduce the flow resistance of the coolant. In addition, the first sub-through hole 441, the second sub-through hole 431 and the third sub-through hole 421 can be designed in multiple corresponding numbers, so as to form multiple spaced channels in the radial direction of the mounting through hole 443 of the bushing assembly. Multiple channels are connected to the mounting through hole 443, so that during the press-fitting of the bushing assembly into the first mounting part 410A or the second mounting part 410B, the third sub-through hole 421 does not need to be aligned with the first channel 411, which helps to reduce the assembly difficulty of the bushing assembly.

[0066] In some embodiments, each hollow bolt 300 includes an end flange 310 and a hollow screw 320. An auxiliary channel 301 is formed inside the hollow screw 320. The auxiliary channel 301 has an auxiliary through hole that can connect to the first sub-through hole 441 in the radial direction.

[0067] It is understood that the end flange 310 is connected to one axial end of the hollow screw 320 to seal one end of the hollow screw 320. The end flange 310, as the head of the hollow bolt 300, can be designed as a hexagonal or octagonal end for external tool clamping to facilitate assembly. Furthermore, the end of the end flange 310 facing the hollow screw 320 protrudes radially to form an annular pressure surface, which increases the contact area with other components during assembly and improves the sealing performance of the hollow bolt 300 connection. The outer peripheral wall of the hollow screw 320, away from the end flange 310, is designed with external threads to allow it to pass through the bushing assembly and be screwed onto the hub motor assembly 500 or the bogie assembly 200. Additionally, the auxiliary through-hole in the auxiliary channel 301, opened radially, allows the auxiliary channel 301 to communicate with the second channel 402 after the hollow screw 320 is assembled, ensuring the formation of a cooling medium passage.

[0068] refer to Figure 1 and Figure 4-6As shown, in some embodiments, the hub motor assembly 500 has two bushing mounting portions 510 arranged at intervals along the X direction on one side along the Y direction; each bushing mounting portion 510 includes a lug 502 arranged at intervals and a first bushing abutment portion 503, the first bushing abutment portion 503 forming a first threaded hole 512, the lug 502 having a mounting hole 511 aligned with the first threaded hole 512, the first threaded hole 512 communicating with one end of the first cooling channel 501; the first mounting portion 4 10A is arranged between the lug 502 and the first bushing abutment portion 503; the end flange 310 of at least one hollow bolt 300 abuts against one end of the lug 502 away from the first mounting portion 410A, and the hollow bolt 320 passes through the mounting hole 511 and the mounting through hole 443 of the bushing inner tube 440 in the first mounting portion 410A in sequence, and is screwed into the first threaded hole 512 so that the bushing inner tube 440 in the first mounting portion 410A abuts against the lug 502 and the first bushing abutment portion 503.

[0069] Two bushing mounting portions 510, spaced apart along the X-axis, are respectively connected to the ends of the first connecting rod assembly 400 and the second connecting rod assembly 600 facing the hub motor assembly 500. Taking the first connecting rod assembly 400 as an example, the first threaded hole 512 formed by the first bushing abutment portion 503 communicates with the first cooling channel 501 inside the hub motor assembly 500. The first mounting portion 410A is arranged between the lug 502 and the first bushing abutment portion 503. The hollow bolt 320 of the hollow bolt 300 passes through the mounting hole 511 on the lug 502 and the mounting hole 510 in the inner tube 440 of the bushing in sequence along the axial direction. After the through hole 443 is installed, it is screwed into the first threaded hole 512, and the end flange 310 abuts against the end of the lug 502 away from the first mounting part 410A. As the hollow bolt 320 is screwed in, the two ends of the bushing inner tube 440 are tightly fitted to the opposite surfaces of the lug 502 and the first bushing abutment part 503. The end flange 310 also abuts against the end of the lug 502 away from the first mounting part 410A, thereby realizing the mutual connection between the first cooling channel 501 and the second cooling channel 401, and realizing the isolation between the first cooling channel 501, the second cooling channel 401 and the auxiliary channel from the external environment.

[0070] Continue to refer to Figure 1 , Figure 4 and Figure 7-8In some embodiments, the bogie assembly 200 includes a bogie body 210 and two connecting joints 220; the bogie body 210 has two second bushing abutment portions 211 arranged at intervals along the X direction, each second bushing abutment portion 211 having a second threaded hole 211A at one end and a mounting cavity 211B communicating with the second threaded hole 211A at the other end; each connecting joint 220 has a connecting channel 221, one end of each connecting joint 220 being disposed in each mounting cavity 211B, the connecting channel 221 and the second threaded hole 211A together forming a third cooling channel 201; each connecting joint 220... The other end is sleeved with the inlet pipe 100 or the outlet pipe 700; the inner tube 440 of the bushing in the second mounting part 410B is connected to the second bushing abutment part 211 by forming a second threaded hole 211A at one end; the end flange 310 of at least one hollow bolt 300 abuts against the end of the inner tube 440 of the bushing in the second mounting part 410B away from the second threaded hole 211A, and the hollow screw 320 passes through the mounting through hole 443 of the inner tube 440 of the bushing in the second mounting part 410B and is screwed into the second threaded hole 211A, so that the two ends of the inner tube 440 of the bushing in the second mounting part 410B abut against the end flange 310 and the second bushing abutment part 211 respectively.

[0071] Two connecting joints 200 are used to connect the inlet pipe 100 and the outlet pipe 700, respectively. Two second bushing abutment portions 211 arranged at intervals along the X direction are used to connect the ends of the first connecting rod assembly 400 and the second connecting rod assembly 600 away from the hub motor assembly 500, respectively. Taking the first connecting rod assembly 400 as an example, one end of the second bushing abutment portion 211 of the bogie body 210 has a second threaded hole 211A, and the other end has a mounting cavity 211B communicating with the second threaded hole 211A. The bushing inner tube 440 in the second mounting portion 410B One end abuts axially against one end of the second bushing abutment portion 211, which has a second threaded hole 211A. The end flange 310 of the hollow bolt 300 abuts against the other end of the inner tube 440 of the bushing. At this time, the hollow screw 320 passes through the mounting through hole 443 of the inner tube 440 and is screwed into the second threaded hole 211A. After the hollow screw 320 is tightened, both ends of the inner tube 440 of the bushing are tightly fitted with the end flange 310 and the second bushing abutment portion 211, respectively, so as to isolate the third cooling channel 201, the second cooling channel 401 and the auxiliary channel from the external environment.

[0072] Furthermore, each connector 220 is provided with a connection channel 221. The connection channel 221 and the second threaded hole 211A together form the third cooling channel 201. One end of each connector 220 is arranged in each mounting cavity 211B and is connected to the second bushing abutment part 211 through the internal thread in the mounting cavity 211B. The other end is sleeved with the liquid inlet pipe 100, thereby achieving a stable connection between the liquid inlet pipe 100 and the third cooling channel 201.

[0073] To ensure the sealing of the cooling medium passage, in some embodiments, the hub motor cooling structure 10 further includes a rubber sealing ring 800 and a copper washer 900; the inner tube 440 of the bushing is provided with grooves 422 on both ends along the axial direction, and the rubber sealing ring 800 is arranged in the grooves 422 to seal the second cooling channel 401 with the third cooling channel 201 or the first cooling channel 501 under the pressure of the hollow bolt 300; the copper washer 900 is disposed between the lug 502 and at least one end flange 310 to seal the second cooling channel 401 with the auxiliary channel 301 under the pressure of the hollow bolt 300.

[0074] Specifically, such as Figure 5 As shown, on one side of the first mounting part 410A, rubber sealing rings 800 are evenly distributed in the grooves 422 at both ends of the bushing inner tube 440. Under the action of the hollow bolt 300, the lug 502 and the first bushing abutment part 503 respectively press against the rubber sealing rings 800 at both ends of the bushing inner tube 440, thereby achieving a seal at the connection between the bushing inner tube 440 and the lug 502 and the first bushing abutment part 503, that is, the second cooling channel 401 and the first cooling channel 501 form a seal; at the same time, the end flange 310 presses against the lug 502 through the copper gasket 900, thereby achieving a seal at the connection between the end flange 310 and the lug 502, that is, the second cooling channel 401 and the auxiliary channel 301 form a seal.

[0075] For example Figure 8 As shown, on one side of the second mounting part 410B, rubber sealing rings 800 are evenly distributed in the grooves 422 at both ends of the bushing inner tube 440. The rubber sealing ring 800 at one end of the bushing inner tube 440 directly presses against and adheres to the end flange 310, thereby achieving a seal at the joint between the end flange 310 and the bushing inner tube 440, that is, the second cooling channel 401 and the auxiliary channel 301 form a seal; the rubber sealing ring 800 at the other end of the bushing inner tube 440 presses against and adheres to the second bushing abutment part 211, thereby achieving a seal at the connection between the bushing inner tube 440 and the second bushing abutment part 211, that is, the second cooling channel 401 and the third cooling channel 201 form a seal.

[0076] Continue to refer to Figure 8A blind groove is provided radially on the outer periphery of the connecting joint 220, and a sealing ring is arranged in the blind groove. After the connecting joint 220 is screwed into the mounting cavity 211B, the sealing ring is used to achieve the sealing between the connecting joint 220 and the second bushing abutment part 211.

[0077] refer to Figure 9 As shown, another embodiment of the present invention also provides an automobile 1000, including the hub motor cooling structure 10 as described above.

[0078] In summary, the hub motor cooling structure 10 and automobile 1000 provided by this utility model embodiment, through the design of the hub motor cooling structure 10, with the bogie assembly 200, the first link assembly 400 and the second link assembly 600 serving as suspension components, not only have the function of motion guidance, but also integrate the function of cooling pipes, replacing the external layout of cooling pipes in the traditional technology. This greatly saves the space for cooling pipe layout, avoids the cooling pipes being exposed to the wheel and interfering with surrounding components, and can avoid being scratched by external objects such as stones, mud, sand, ice and snow. No additional protective measures are required, effectively improving cooling reliability while reducing the complexity and cost of the vehicle structure.

[0079] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. A hub motor cooling structure, characterized in that, include: The bogie assembly (200), the first link assembly (400), the hub motor assembly (500), and the second link assembly (600); A first cooling channel (501) is formed within the hub motor assembly (500); The first connecting rod assembly (400) and the second connecting rod assembly (600) are arranged at intervals along the X direction, and each has a second cooling channel (401) formed inside. One end of the first connecting rod assembly (400) and the second connecting rod assembly (600) are respectively connected to the hub motor assembly (500). The bogie assembly (200) is arranged along the X direction between the first link assembly (400) and the second link assembly (600), and is connected to the other end of the first link assembly (400) and the second link assembly (600) respectively. The bogie assembly (200) forms two third cooling channels (201) arranged at intervals along the X direction. Each of the second cooling channels (401) has one end connected to the third cooling channel (201) corresponding to the X direction and the other end connected to the first cooling channel (501) to form a cooling medium passage.

2. The hub motor cooling structure according to claim 1, characterized in that, It also includes an inlet pipe (100) and an outlet pipe (700), wherein the inlet pipe (100) and the outlet pipe (700) are arranged at intervals along the X direction between the two third cooling channels (201) and are respectively connected to and communicate with the corresponding third cooling channels (201).

3. The hub motor cooling structure according to claim 2, characterized in that, It also includes multiple hollow bolts (300); The two ends of the first link assembly (400) or the second link assembly (600) are respectively connected to the bogie assembly (200) and the hub motor assembly (500) by the hollow bolts (300); One end of the hollow bolt (300) has an auxiliary channel (301) formed therein, and the hollow bolt (300) extends at least partially into the second cooling channel (401) so that the auxiliary channel (301) is connected to the second cooling channel (401).

4. The hub motor cooling structure according to claim 3, characterized in that, Both the first link assembly (400) and the second link assembly (600) include a link body (410) and a bushing assembly; The connecting rod body (410) extends along the X direction, and a first channel (411) is formed inside the connecting rod body (410). A first mounting part (410A) and a second mounting part (410B) are respectively provided at both ends of the first channel (411). The bushing assembly is press-fitted into both the first mounting part (410A) and the second mounting part (410B). The bushing assembly in the first mounting part (410A) is used to connect the hub motor assembly (500), and the bushing assembly in the second mounting part (410B) is used to connect the bogie assembly (200). The bushing assembly has a second channel (402) and the second channel (402) communicates with the first channel (411) to jointly form the second cooling channel (401); Each of the hollow bolts (300) is at least partially located within the second channel (402) for abutting the bushing assembly against the bogie assembly (200) or the hub motor assembly (500); The auxiliary channel (301) is connected to the first channel (411), and the second channel (402) is connected to the third cooling channel (201) or the first cooling channel (501).

5. The hub motor cooling structure according to claim 4, characterized in that, The bushing assembly includes an inner bushing tube (440), a bushing body (430), and an outer bushing tube (420) connected sequentially from the inside to the outside; The bushing inner tube (440) has an axially formed mounting through hole (443) for the hollow bolt (300) to extend into at least part of it. The bushing inner tube (440) has at least one first sub-through hole (441) communicating with the mounting through hole (443) in the radial direction. The bushing body (430) has at least one second sub-through hole (431) along the radial direction; The bushing outer tube (420) is press-fitted into the first mounting part (410A) or the second mounting part (410B), and at least one third sub-through hole (421) is opened along the radial direction; At least one of the first sub-through holes (441), the second sub-through hole (431) and the third sub-through hole (421) are radially connected to form the second channel (402) together with the mounting through hole (443).

6. The hub motor cooling structure according to claim 5, characterized in that, Each of the hollow bolts (300) includes an end flange (310) and a hollow screw (320), wherein the hollow screw (320) has an auxiliary channel (301) formed therein, and the auxiliary channel (301) has an auxiliary through hole that can connect to the first sub-through hole (441) in the radial direction.

7. The hub motor cooling structure according to claim 6, characterized in that, The hub motor assembly (500) has two bushing mounting parts (510) arranged at intervals along the X direction on one side along the Y direction; Each of the bushing mounting portions (510) includes lugs (502) arranged at relatively intervals and a first bushing abutment portion (503). The first bushing abutment portion (503) is formed with a first threaded hole (512). The lugs (502) are provided with mounting holes (511) aligned with the first threaded hole (512). The first threaded hole (512) is connected to one end of the first cooling channel (501). The first mounting portion (410A) is disposed between the ear piece (502) and the first bushing abutment portion (503); At least one of the hollow bolts (300) has its end flange (310) abutting against the end of the lug (502) away from the first mounting portion (410A), and the hollow screw (320) passes through the mounting hole (511) and the mounting through hole (443) of the bushing inner tube (440) in the first mounting portion (410A) in sequence, and is screwed into the first threaded hole (512) so that the bushing inner tube (440) in the first mounting portion (410A) abuts against the lug (502) and the first bushing abutment portion (503).

8. The hub motor cooling structure according to claim 6, characterized in that, The bogie assembly (200) includes a bogie body (210) and two connecting joints (220); The bogie body (210) has two second bushing abutment portions (211) arranged at intervals along the X direction. Each second bushing abutment portion (211) has a second threaded hole (211A) at one end and a mounting cavity (211B) communicating with the second threaded hole (211A) at the other end. Each of the connecting joints (220) is formed with a connecting channel (221), and one end of each of the connecting joints (220) is arranged in each of the mounting cavities (211B). The connecting channel (221) and the second threaded hole (211A) together form the third cooling channel (201). The other end of each of the connecting joints (220) is sleeved onto the inlet pipe (100) or the outlet pipe (700); The inner tube (440) of the bushing in the second mounting part (410B) is connected to the second bushing abutment part (211) by a second threaded hole (211A) at one end; At least one of the hollow bolts (300) has its end flange (310) abutting against the end of the bushing inner tube (440) in the second mounting part (410B) away from the second threaded hole (211A), and the hollow screw (320) passes through the mounting through hole (443) of the bushing inner tube (440) in the second mounting part (410B) and is screwed into the second threaded hole (211A) so that both ends of the bushing inner tube (440) in the second mounting part (410B) abut against the end flange (310) and the second bushing abutting part (211) respectively.

9. The hub motor cooling structure according to claim 5, characterized in that, The hub motor cooling structure also includes a rubber sealing ring (800) and a copper washer (900); The inner tube of the bushing (440) has grooves (422) on both ends along the axial direction. The rubber sealing ring (800) is arranged in the groove (422) to seal the second cooling channel (401) with the third cooling channel (201) or the first cooling channel (501) under the pressure of the hollow bolt (300). The copper washer (900) is disposed between the lug (502) and at least one end flange (310) to seal the second cooling channel (401) and the auxiliary channel (301) under the pressure of the hollow bolt (300).

10. A car, characterized in that, Includes the hub motor cooling structure (10) as described in any one of claims 1 to 9.

Images