A hub motor and a heat dissipation system for the hub motor

Abstract

The invention discloses a wheel hub motor and a heat dissipation system for the wheel hub motor, which relate to the technical field of new energy vehicles. The wheel hub motor comprises an iron piece, a side-mounted motor is arranged on one side of the iron piece, a gearbox assembly is arranged on the other side, a wheel hub assembly is arranged below the iron piece, a stator core is arranged in the side-mounted motor, an electromagnetic brake block is arranged at the end of the stator core, a rotor core is arranged on the inner side of the stator core, a thermal insulation layer is arranged between the rotor core and the stator core, a stator core is arranged in the side-mounted motor, a rotor core is arranged on the inner side of the stator core, a thermal insulation layer is arranged between the rotor core and the stator core, direct transfer of heat to a wheel rim is reduced, and a heat dissipation method combining liquid cooling and air cooling is used to effectively reduce the operating temperature of the wheel hub motor, improve the power density and continuous output capacity of the motor, and good heat dissipation conditions reduce the performance degradation and damage of the wheel hub motor caused by overheating, thereby extending the service life of the wheel hub motor.

Description

Technical Field

[0001] The present invention relates to the technical field of new energy vehicles, and in particular to a hub motor and a heat dissipation system for the hub motor. Background Art

[0002] As a key component of the electric vehicle drive system, the hub motor is directly integrated into the wheel and has the advantages of compact structure, high transmission efficiency, and rapid response. However, due to its highly integrated design, the heat generated by the hub motor during operation is difficult to dissipate effectively. Long-term high-temperature operation will not only reduce the performance and efficiency of the motor, but may also cause safety hazards. Therefore, developing an efficient heat dissipation system is crucial to improving the overall performance of the hub motor. Therefore, it is necessary to design a hub motor and a heat dissipation system for the hub motor. Summary of the invention

[0003] The object of the present invention is to provide a hub motor and a heat dissipation system for the hub motor to solve the problems raised in the above background technology. The hub motor involved in the present invention is a prior art structure and will not be described in detail in the present invention.

[0004] In order to solve the above technical problems, the present invention provides the following technical solutions: a hub motor and a heat dissipation system for the hub motor, comprising an iron piece, a side-mounted motor is arranged on one side of the iron piece, a gearbox assembly is arranged on the other side, a hub assembly is arranged below the iron piece, a stator core is arranged in the side-mounted motor, a rotor core is arranged on the inner side of the stator core, and a thermal isolation layer is arranged between the rotor core and the stator core.

[0005] According to the above technical solution, a water cooling box is fixedly installed on the top of the iron piece, a conduit extends from a side wall of the water cooling box, the conduit extends into the iron piece, extends out through the other side of the iron piece, and is connected to the other side of the water cooling box. A condenser is arranged in the water cooling box.

[0006] According to the above technical solution, a plurality of clamping rods are fixedly installed on the inner wall of the iron piece, and the conduit is wound around the clamping rods.

[0007] According to the above technical solution, a micro pump is provided at the connection between the conduit and one end of the water cooling box.

[0008] According to the above technical solution, a fan is arranged on the top of the iron part, a plurality of short rods are evenly fixedly installed on the edge of the top shell of the fan, a storage box is fixedly installed on the top of the plurality of short rods, and a connecting pipe is arranged between the top of the storage box and the water cooling box.

[0009] According to the above technical solution, a nozzle is arranged on the top of the storage box.

[0010] According to the above technical solution, an outer cover is arranged on the outer side wall of the side-mounted motor, the outer cover includes an outer body and an inner body, a short groove is arranged on the surface of the outer body, a first annular slide rail is arranged inside the outer body, a plurality of fan blades are arranged on the first annular slide rail, fixed rods are arranged at the ends of the plurality of fan blades, and the fixed rods are fixedly installed on the transmission shaft in the wheel hub assembly.

[0011] According to the above technical solution, a side groove is arranged on the side wall of the outer body, an inner hole is arranged on the outer side wall of the outer body, a plurality of sliding rails are fixedly installed on the side wall of the inner hole, and the sliding rails are slidably connected to the card cover.

[0012] According to the above technical solution, a slot is arranged on the side wall of the card cover, two electric control rods are arranged in the middle area of ​​the slot, and a baffle is fixedly mounted on each electric control rod.

[0013] According to the above technical solution, the gearbox generally includes an outer box body and an inner box body, and a telescopic rod is arranged between the outer box body and the inner box body.

[0014] Compared with the prior art, the beneficial effects achieved by the present invention are as follows: the present invention, by providing a heat dissipation method combining liquid cooling and air cooling, effectively reduces the operating temperature of the hub motor and improves the power density and continuous output capacity of the motor. Good heat dissipation conditions reduce the performance degradation and damage of the motor caused by overheating and extend the service life of the motor. The intelligent temperature control system ensures the stable operation of the motor under various working conditions and reduces the safety hazards caused by high temperature. The heat dissipation system is highly integrated with the hub motor without adding additional volume, which is convenient for application in various vehicle models. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0016] Figure 1 It is a schematic diagram of the overall front three-dimensional structure of the present invention;

[0017] Figure 2 It is a schematic diagram of the overall back three-dimensional structure of the present invention;

[0018] Figure 3 The overall explosion structure of the present invention is schematically shown in FIG. Figure 1 ;

[0019] Figure 4 The overall explosion structure of the present invention is schematically shown in FIG. Figure 2 ;

[0020] Figure 5 is a schematic diagram of the clamping rod and the catheter of the present invention;

[0021] Figure 6 is a schematic diagram of a card cover of the present invention;

[0022] Figure 7 is a schematic diagram of a fan blade of the present invention;

[0023] Figure 8 is a schematic diagram of a baffle of the present invention;

[0024] Fig. 9 It is a schematic diagram of the outer box body and the inner box body of the present invention;

[0025] Fig.10 It is a schematic diagram of the internal structure of the water cooling box of the present invention;

[0026] Fig.11 is a schematic diagram of a storage box and a fan of the present invention;

[0027] In the figure: 1. Iron parts; 2. Side-mounted motor; 3. Gearbox assembly; 4. Wheel hub assembly; 5. Water cooling box; 6. Conduit; 7. Condenser; 8. Clamping rod; 9. Micro pump; 10. Fan; 11. Short rod; 12. Storage box; 13. Connecting pipe; 14. Inlet; 15. Outer cover; 16. Side groove; 17. Inner hole; 18. Sliding track; 19. Clamping cover; 20. Empty groove; 21. Electric control rod; 22. Baffle; 23. Outer body; 24. Inner body; 25. Short groove; 26. Annular slide rail; 27. Fan blade; 28. Fixed rod; 29. ​​Transmission shaft; 30. Outer box; 31. Inner box; 32. Telescopic rod; 33. Stator core; 34. Rotor core. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] See also Figure 1-11 The present invention provides a technical solution: a hub motor and a heat dissipation system for the hub motor, comprising an iron piece 1, a side-mounted motor 2 is arranged on one side of the iron piece 1, a gearbox assembly 3 is arranged on the other side, and a hub assembly 4 is arranged below the iron piece 1;

[0030] The iron piece 1 is made of a high thermal conductivity material, such as an aluminum alloy or a copper alloy;

[0031] A stator core 33 is disposed in the side-mounted motor 2 , a rotor core 34 is disposed inside the stator core 33 , and a thermal isolation layer is disposed between the rotor core 34 and the stator core 33 to reduce direct transfer of heat to the wheel rim.

[0032] The internal structure of the gearbox assembly 3 is smaller than that of the side-mounted motor 2, resulting in less space for the gears in the side-mounted motor 2 to contact the outside world.

[0033] A water cooling box 5 is fixedly installed on the top of the iron piece 1, and a conduit 6 extends from a side wall surface of the water cooling box 5. The conduit 6 is bent downward and extends into the interior of the iron piece 1, and is interspersed and surrounded in an orderly manner inside the iron piece 1, and then extends from the other side of the iron piece 1, and is finally connected to the other side of the water cooling box 5. A wire connection is set at the bottom of the water cooling box 5, and the front end of the wire connection is connected to the vehicle body where the wheel hub motor is placed. When the vehicle body is running, the condenser 7 set in the water cooling box 5 can be started, and the cooling medium is filled in the water cooling box 5. By supplying power to the condenser 7, the condenser 7 is driven to run and then the cooling medium is cooled down, ensuring that the temperature of the cooling medium is always at a preset temperature value, so that the wheel hub assembly 4 can be cooled efficiently;

[0034] A plurality of clamping rods 8 are fixedly installed on the inner wall of the iron piece 1. After the conduit 6 extends into the interior of the iron piece 1, it is wound around the plurality of clamping rods 8 and then extends out of the iron piece 1. The purpose of using the clamping rods 8 to wind the conduit 6 is to increase the length of the conduit 6 in the iron piece 1, so that the cooling medium in the conduit 6 has a higher cooling efficiency for the internal space of the iron piece 1, thereby maximizing the heat exchange efficiency.

[0035] A micro pump 9 is provided at the connection between the conduit 6 and one end of the water cooling box 5. The micro pump 9 is started at the same time after the vehicle body is running, and the cooling medium in the water cooling box 5 is transported to the conduit 6. Due to the pressurized transport of the micro pump 9, the cooling medium in the conduit 6 can flow back to the water cooling box 5 through the conduit 6, and then the cooling medium continuously dissipates heat inside the iron part 1 through this circulation path, directly absorbing and taking away the heat generated by the motor;

[0036] A fan 10 is arranged on the top of the iron piece 1. The fan 10 is started after the vehicle body is running, and the external airflow is transported into the interior of the iron piece 1, thereby completing air cooling and heat dissipation;

[0037] A plurality of short rods 11 with telescopic functions are evenly fixedly installed on the edge of the top shell of the fan 10, and a storage box 12 is fixedly installed on the top of the plurality of short rods 11. A protruding structure is arranged at the bottom of the storage box 12, and the protruding structure matches the heat dissipation area of ​​the fan 10. When it is necessary to cool the interior of the iron piece 1 with air, the short rods 11 are extended to drive the storage box 12 to move upward, thereby generating a gap space between the fan 10 and the storage box 12 to provide airflow for the fan 10. When it is not necessary to cool the interior of the iron piece 1 with air, the short rods 11 are shortened to drive the storage box 12 to retract, and then the storage box 12 drives the protruding structure to move toward the position of the fan 10 until the protruding structure seals the air inlet of the fan 10, thereby ensuring that no dust enters the interior of the iron piece 1 from the air inlet of the fan 10 when the fan 10 is not in operation.

[0038] A connecting pipe 13 is provided between the top of the storage box 12 and the water cooling box 5. The connecting pipe 13 connects the storage box 12 and the water cooling box 5, so that the cooling medium fills the storage box 12 and the water cooling box 5. When the condenser 7 in the water cooling box 5 cools down the cooling medium, the cooling medium in the storage box 12 is also cooled down. When the fan 10 performs air cooling and heat dissipation, the cold air emitted by the storage box 12 is driven into the iron piece 1, thereby improving the heat dissipation efficiency of the fan 10.

[0039] A nozzle 14 is provided at the top of the storage box 12, and the cooling medium is injected into the storage box 12 through the nozzle 14. The cooling medium in the storage box 12 enters the water cooling box 5 and the conduit 6 through the connecting pipe 13;

[0040] In this embodiment, a temperature sensor and a controller can be set inside the iron piece 1 to monitor the temperature inside the iron piece 1 in real time, and automatically adjust the working state of the water cooling box 5 according to a preset temperature threshold, such as adjusting the flow rate of the cooling medium, starting or shutting down the fan 10, etc., to achieve precise temperature control, avoid overcooling or undercooling, save energy, and ensure that the temperature inside the iron piece 1 is always within the optimal operating temperature range.

[0041] An outer cover 15 is arranged on the outer wall of the side-mounted motor 2. The outer cover 15 includes an outer body 23 and an inner body 24. A short groove 25 is arranged on the surface of the outer body 23. A first annular slide rail 26 is arranged inside the outer body 23. A plurality of fan blades 27 are arranged on the first annular slide rail 26. The plurality of fan blades 27 are centrally fixed on a fixed rod 28. The fixed rod 28 is fixedly installed on a transmission shaft 29 in the wheel hub assembly 4, so that when the vehicle body is running, its transmission shaft 29 drives the fixed rod 28 to rotate, and then drives the fan blades 27 to rotate along the first annular slide rail 26, so that the airflow in the outer body 23 is exchanged with the external annular airflow. The special air duct design of the outer body 23 is used to guide the air flow and enhance the natural convection heat dissipation effect. The purpose of setting the short groove 25 is to perform basic heat dissipation on the side-mounted motor 2.

[0042] The side wall of the inner body 24 is provided with a plurality of radially extending heat dissipation fins to increase the heat exchange area;

[0043] The side wall of the outer body 23 is provided with a side groove 16, the outer side wall of the outer body 23 is provided with an inner hole 17, and a plurality of sliding rails 18 are fixedly installed on the side wall of the inner hole 17. The sliding rails 18 are slidably connected to the card cover 19. After the vehicle body is running, the card cover 19 is driven to move along the sliding rails 18. The intelligent temperature control system in the vehicle body controls the moving distance of the card cover 19 and sets the moving distance value of the card cover 19 to H, which is divided into 6 levels from H1 to H6, H1 indicates that the moving distance of the card cover 19 is the shortest, and H6 indicates that the moving distance of the card cover 19 is the longest. The intelligent temperature control system sets the operating power of the side-mounted motor 2 to P, which is divided into 6 levels from P1 to P6, P1 indicates that the operating power of the side-mounted motor 2 is the shortest, and P6 indicates that the operating power of the side-mounted motor 2 is the longest. H1-H6 corresponds to P1-P6 one by one, and the intelligent temperature control system adjusts the ventilation area of ​​the side slot 16 according to the operating power of the side-mounted motor 2. The greater the operating power of the side-mounted motor 2, the faster the card cover 19 moves along the sliding track 18. The greater the distance moved toward the outside, if the ventilation area of ​​the side slot 16 is directly controlled to be the largest, the heat dissipation of the side-mounted motor 2 will be overloaded, resulting in the temperature of the side-mounted motor 2 being too low in a low-temperature environment, resulting in increased energy consumption of the side-mounted motor 2. By providing the card cover 19, an additional heat dissipation process is performed on the side-mounted motor 2, so that the side-mounted motor 2 can maintain efficient heat dissipation during high-power and long-term operation;

[0044] An empty slot 20 is provided on the side wall of the card cover 19, and two electric control rods 21 are provided in the middle area of ​​the empty slot 20. A baffle 22 is fixedly installed on each electric control rod 21. If the external environment is rainy, if the side slot 16 is opened, rainwater will enter the side-mounted motor 2, causing damage to the side-mounted motor 2. At this time, the electric control rod 21 is driven by the intelligent temperature control system to rotate and drive the baffle 22 to rotate upward, and a gap space is generated between the baffle 22 and the card cover 19, so that air enters the side-mounted motor 2 through the gap space. Among them, the intelligent temperature control system controls the two electric control rods 21 to operate alternately at a frequency, so that the gas in the side-mounted motor 2 can be exchanged with the external environment, effectively reducing the working temperature of the wheel hub motor and improving the power density and continuous output capacity of the motor;

[0045] The gearbox 3 comprises an outer box body 30 and an inner box body 31, and a telescopic rod 32 is arranged between the outer box body 30 and the inner box body 31. The gearbox 3 generates a lot of heat energy during operation, and a variable frequency heat dissipation system is arranged for the gearbox 3. The intelligent temperature control system controls the operation of the telescopic rod 32, and then drives the outer box body 30 to move, so that a gap space is generated between the outer box body 30 and the inner box body 31, and the gearbox 3 is cooled by air through this space. A gear for driving the wheel hub assembly 4 to operate is arranged in the gearbox 3, and the temperature of the hot air flow therein is high. If the wheel hub assembly 4 runs at high speed for a long time, the telescopic rod 32 is driven to drive the outer box body 30 to move, and then the gearbox 3 is cooled. This method has a fast heat dissipation speed, and only a short heat dissipation time is required to reduce the temperature in the gearbox 3 to a preset temperature threshold. Moreover, since there are many gears in the gearbox 3, if a structure suitable for long-term heat dissipation is set, dust will accumulate in the gearbox 3, affecting the operation efficiency of the gears.

[0046] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0047] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A hub motor, comprising an iron member (1), characterized in that: A side-mounted motor (2) is arranged on one side of the iron piece (1), and a gearbox assembly (3) is arranged on the other side; a wheel hub assembly (4) is arranged below the iron piece (1); a stator core (33) is arranged inside the side-mounted motor (2); a rotor core (34) is arranged inside the stator core (33); a thermal isolation layer is arranged between the rotor core (34) and the stator core (33); a water-cooling box (5) is fixedly mounted on the top of the iron piece (1); a conduit (6) extends from a side wall surface of one side of the water-cooling box (5); the conduit (6) extends into the iron piece (1), extends out through the other side of the iron piece (1), and is connected to the other side of the water-cooling box (5); a condenser (7) is arranged inside the water-cooling box (5); the iron piece (1) is made of a high thermal conductivity material; the internal structure of the gearbox assembly (3) is less than that of the side-mounted motor (2), so that the space for the gears in the side-mounted motor (2) to contact the outside is less; A plurality of clamping rods (8) are fixedly mounted on the inner wall of the iron piece (1), and the conduit (6) is wound around the clamping rods (8); A fan (10) is arranged on the top of the iron member (1), a plurality of short rods (11) are evenly fixedly mounted on the edge of the top shell of the fan (10), a storage box (12) is fixedly mounted on the tops of the plurality of short rods (11), and a connecting pipe (13) is arranged between the top of the storage box (12) and the water cooling box (5); An outer cover (15) is arranged on the outer side wall of the side-mounted motor (2), the outer cover (15) comprising an outer body (23) and an inner body (24), a short groove (25) is arranged on the surface of the outer body (23), a first annular slide rail (26) is arranged inside the outer body (23), a plurality of fan blades (27) are arranged on the first annular slide rail (26), fixed rods (28) are arranged at the ends of the plurality of fan blades (27), and the fixed rods (28) are fixedly mounted on a transmission shaft (29) in the hub assembly (4).

2. The wheel hub motor according to claim 1, characterized in that: A nozzle (14) is provided on the top of the storage box (12).

3. A hub motor according to claim 2, characterized in that: A side groove (16) is provided on the side wall of the outer body (23), an inner hole (17) is provided on the outer side wall of the outer body (23), a plurality of sliding rails (18) are fixedly mounted on the side wall of the inner hole (17), and the sliding rails (18) are slidably connected to the card cover (19).

4. The wheel hub motor according to claim 3, characterized in that: A hollow groove (20) is provided on the side wall of the card cover (19), two electric control rods (21) are provided in the middle area of ​​the hollow groove (20), and a baffle (22) is fixedly mounted on each electric control rod (21).

5. The wheel hub motor according to claim 4, characterized in that: The gearbox assembly (3) comprises an outer box body (30) and an inner box body (31), and a telescopic rod (32) is arranged between the outer box body (30) and the inner box body (31).

6. A heat dissipation system, characterized in that: The heat dissipation system is used for the hub motor as described in any one of claims 1-5.

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