Hub motor with efficient heat dissipation effect

Abstract

The utility model discloses a hub motor with an efficient heat dissipation effect, which comprises a motor, a hollow shaft and a connecting mechanism, the motor comprises a shell, a plurality of magnets are fixedly connected with the inner wall of the shell, a stator is arranged in the shell, the plurality of magnets surround the outer side of the stator, one end of the hollow shaft penetrates into the shell, the hollow shaft is rotatably connected with the shell, and the connecting mechanism is connected with the hollow shaft. An exhaust hole is formed in the outer side of the hollow shaft and located in the shell, the center of the stator is fixedly connected with the hollow shaft, an air inlet pipe is installed on the hollow shaft, one end of the air inlet pipe is located in the shell, the other end of the air inlet pipe is located on the outer side of the shell, the connecting mechanism is fixedly connected with the hollow shaft, and the other end of the hollow shaft is communicated with an exhaust pipe. According to the hub motor with the efficient heat dissipation effect, the air inlet pipe and the hollow shaft are used for guiding air to flow, the operation heat of the motor is taken away, and the temperature is reduced.

Description

Technical Field

[0001] This utility model relates to the field of heat dissipation in hub motors, and more particularly to a hub motor with efficient heat dissipation. Background Technology

[0002] In the field of new energy vehicles, hub motors are widely used due to their compact structure and high transmission efficiency. The heat dissipation design of existing hub motors mainly relies on the natural convection between the motor casing and the external air to dissipate heat.

[0003] However, since the hub motor is directly integrated inside the wheel, its enclosed space results in a limited heat dissipation surface area. Furthermore, the airflow disturbance in the hub area during vehicle operation is complex, making it difficult to form a stable heat exchange path. When the motor is running under continuous high load, the heat generated by the internal windings and permanent magnets tends to accumulate on the surface of the outer casing, causing the motor temperature to rise rapidly. Although some technologies attempt to improve heat dissipation efficiency by optimizing the casing material or adding heat dissipation fins, the overall effectiveness of the passive heat dissipation mode is still insufficient to meet the thermal management requirements of high power density motors due to the constraints of hub space and weight, thus limiting the reliability and service life of hub motors. Utility Model Content

[0004] The purpose of this invention is to provide a hub motor with high-efficiency heat dissipation, which uses an intake pipe and a hollow shaft to guide airflow, remove the operating heat of the motor, and reduce the temperature.

[0005] The technical solution adopted by the hub motor with high-efficiency heat dissipation disclosed in this utility model is as follows:

[0006] The device includes a motor, a hollow shaft, and a connecting mechanism. The motor includes a housing with multiple magnets fixedly connected to the inner wall of the housing. A stator is located inside the housing, with the multiple magnets surrounding the outer side of the stator. One end of the hollow shaft passes through the housing and is rotatably connected to the housing. An exhaust port is provided on the outer side of the hollow shaft and is located inside the housing. The center of the stator is fixedly connected to the hollow shaft. An air intake pipe is installed on the hollow shaft, with one end of the air intake pipe located inside the housing and the other end located outside the housing. The connecting mechanism is fixedly connected to the hollow shaft, and the other end of the hollow shaft is connected to the exhaust pipe.

[0007] As a preferred embodiment, one end of the air intake pipe is connected to a connecting pipe, the connecting pipes are connected end to end, and the connecting pipes are provided with multiple vent holes, the vent holes facing the stator.

[0008] As a preferred embodiment, the stator has a plurality of first mounting seats arranged at intervals, and a first winding is wound on the first mounting seats.

[0009] As a preferred embodiment, a second mounting base extends from the first mounting base, and a second winding is wound around the second mounting base.

[0010] As a preferred embodiment, a PCB board is fixedly connected to the stator, and multiple sensors are electrically connected to the PCB board.

[0011] As a preferred embodiment, a first wire, a second wire, and a third wire are installed on the hollow shaft. One end of the first wire is electrically connected to the first winding, one end of the second wire is electrically connected to the second winding, and one end of the third wire is electrically connected to the PCB board. The other ends of the first wire, the second wire, and the third wire are all located on the outside of the outer casing.

[0012] As a preferred embodiment, the connecting mechanism includes a connecting seat, a connecting plate, and an I-beam insulating pad. The connecting seat is fixedly connected to the hollow shaft. A connecting hole is provided on the connecting plate. The middle part of the I-beam insulating pad is inserted into the connecting hole. A screw is provided on the I-beam insulating pad. The screw passes through the I-beam insulating pad and is fixedly connected to the connecting seat.

[0013] As a preferred embodiment, the hollow shaft is detachably connected to two nuts, the connecting seat is located between the two nuts, a pin is fixedly connected to the hollow shaft, a limiting groove is provided on the connecting seat, and the pin is located in the limiting groove.

[0014] The beneficial effects of the hub motor with high-efficiency heat dissipation disclosed in this utility model are:

[0015] The housing is fixedly connected to the hub in the background technology, and the connecting mechanism is fixedly connected to the vehicle. High-pressure cold air is introduced into the housing through the intake pipe. When the cold air flows through the gap between the stator and the magnet, it absorbs heat. The heated air flows into the inner cavity of the hollow shaft through the exhaust hole on the hollow shaft and is finally discharged in a direction through the exhaust pipe, thereby cooling the inside of the motor and improving the efficiency of cooling the motor. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of a hub motor with high-efficiency heat dissipation according to the present invention.

[0017] Figure 2 This is a schematic diagram of the hub mounting of a hub motor with high-efficiency heat dissipation according to the present invention.

[0018] Figure 3 This is a cross-sectional view of a hub motor with high-efficiency heat dissipation according to the present invention.

[0019] Figure 4 This is a schematic diagram of the connection mechanism of a hub motor with high heat dissipation effect according to the present invention.

[0020] Figure 5 This is a partial sectional view of the connection mechanism of a hub motor with high heat dissipation effect according to this utility model.

[0021] Figure 6 This is a schematic diagram of the air intake pipe structure of a hub motor with high-efficiency heat dissipation according to the present invention.

[0022] Figure 7 This is a schematic diagram of the first winding structure of a hub motor with high-efficiency heat dissipation according to the present invention.

[0023] Figure 8 This is a schematic diagram of the second winding structure of a hub motor with high-efficiency heat dissipation according to the present invention.

[0024] Figure 9 This is a schematic diagram of the PCB board structure of a hub motor with high heat dissipation effect according to the present invention. Detailed Implementation

[0025] The present invention will be further described and illustrated below with reference to specific embodiments and the accompanying drawings:

[0026] Please refer to Figures 1-3 .

[0027] The present invention discloses a hub motor with high heat dissipation effect, comprising a motor 1, a hollow shaft 2 and a connecting mechanism 4;

[0028] The motor 1 includes a housing 11; a plurality of magnets 111 are fixedly connected to the inner wall of the housing 11, and the plurality of magnets 111 are arranged around the center of the housing 11; two bearings 112 are embedded in the inner wall of the housing 11, the center of the bearings 112 is located on the rotation axis of the housing 11, and the two bearings 112 are respectively close to the two ends of the housing 11.

[0029] One end of the hollow shaft 2 is inserted into the housing 11. One bearing 112 is sleeved on the outer side of one end of the hollow shaft 2, and the other bearing 112 is sleeved on the outer side of the middle part of the hollow shaft 2. The hollow shaft 2 is rotatably connected to the housing 11 through the two bearings 112. The rotation axis of the housing 11 is coaxial with the hollow shaft 2.

[0030] In the background technology, the hub 3 is fixedly connected to one end of the outer shell 11, the hub 3 is coaxial with the hollow shaft 2, so that the hub 3 rotates on the hollow shaft 2 through the outer shell 11; a tire 31 is fitted on the hub 3, and a cover plate 32 is fixedly connected to one end of the hub 3.

[0031] Furthermore, a brake disc 113 is fixedly connected to the other end of the outer casing 11, and the hollow shaft 2 passes through the brake disc 113, with the brake disc 113 and the hollow shaft 2 being coaxial.

[0032] Please refer to Figure 1 , Figure 4 and Figure 5 .

[0033] The connecting mechanism 4 is fixedly connected to the hollow shaft 2. The connecting mechanism 4 includes a connecting seat 41, a connecting plate 42, and an I-beam insulating pad 421. Two nuts 43 are detachably connected to the hollow shaft 2. The other end of the hollow shaft 2 passes through the connecting seat 41. The connecting seat 41 is located between the two nuts 43. The connecting seat 41 is detachably connected to the hollow shaft 2 through the two nuts 43. The two nuts 43 limit the hollow shaft 2 to be installed on the connecting mechanism 4. Maintenance personnel only need to remove the two nuts 43 to repair or replace the brake disc 113, which is convenient for maintenance personnel.

[0034] Furthermore, a pin 21 is fixedly connected to the hollow shaft 2, and a limiting groove 411 is provided on the connecting seat 41. The pin 21 is located in the limiting groove 411. By the design of the pin 21 being inserted into the limiting groove 411, the rotation of the hollow shaft 2 in the connecting seat 41 can be restricted.

[0035] In this embodiment, the connecting plate 42 is preferably made of two pieces, which are located on both sides of the connecting seat 41 respectively. The connecting plate 42 has a connecting hole. In this embodiment, the insulating pad 421 is preferably made of two pieces, with the middle part of the insulating pad 421 inserted into the connecting hole. The insulating pad 421 is provided with a screw 422, which passes through the insulating pad 421 and is fixedly connected to the connecting seat 41. The connecting plate 42 is fixedly connected to the designated position of the vehicle. The screw 422 and the connecting seat 41 are spaced apart from the connecting plate 42 through the insulating pad 421. The insulating pad 421 simultaneously achieves the dual functions of electrical insulation and mechanical shock absorption.

[0036] Please refer to Figure 1 , Figure 3 and Figure 6 .

[0037] The outer casing 11 contains a stator 12, and multiple magnets 111 surround the outer side of the stator 12. One end of the hollow shaft 2 passes through the center of the stator 12, and the center of the stator 12 is fixedly connected to the outer side of the hollow shaft 2.

[0038] An air inlet pipe 22 is installed on the hollow shaft 2. The air inlet pipe 22 is located inside the hollow shaft 2. One end of the air inlet pipe 22 extends out of the hollow shaft 2 and is located inside the outer casing 11. The other end of the air inlet pipe 22 extends out of the hollow shaft 2 and is located outside the outer casing 11, so that high-pressure cold air can enter the outer casing 11 through the air inlet pipe 22.

[0039] Furthermore, one end of the intake pipe 22 is connected to a connecting pipe 221. The connecting pipe 221 is connected end to end to form a ring. The connecting pipe 221 is coaxial with the hollow shaft 2. Multiple vent holes are arranged at intervals on the connecting pipe 221. The interior of the connecting pipe 221 is connected to the interior of the outer shell 11 through the vent holes. The vent holes face the stator 12.

[0040] Furthermore, an exhaust hole 23 is provided on the outer side of the hollow shaft 2. The exhaust hole 23 is located inside the outer casing 11. The interior of the hollow shaft 2 is connected to the interior of the outer casing 11 through the exhaust hole 23. In this embodiment, it is preferred that there are four exhaust holes 23, and the four exhaust holes 23 surround the outer side of the hollow shaft 2.

[0041] Furthermore, the other end of the hollow shaft 2 is connected to the exhaust pipe 24;

[0042] When this electric motor is installed on a vehicle and is running, the motor 1 generates heat inside. High-pressure cold air is guided through the intake pipe 22 to the connecting pipe 221. The connecting pipe 221 guides the cold air evenly to the surface of the stator 12 through multiple evenly distributed vents. The cold air exchanges heat with the stator 12 to form hot air. The four exhaust ports 23 and the hollow shaft 2 form a convection heat dissipation channel inside the housing 11, so that the hot air inside the housing 11 can be discharged more quickly through the exhaust ports 23 from the hollow shaft, thereby cooling the running motor 1 and reducing the operating temperature of the motor 1.

[0043] By increasing the intake pressure of cold air entering the motor, the airflow speed of cold air is significantly increased, thereby enhancing heat dissipation efficiency, effectively reducing the operating temperature of the motor, and ultimately increasing the operating power of the motor. Based on the real-time output power parameters of motor 1, the pressure parameters of cold air entering the intake pipe 22 can be dynamically adjusted so that the heat exchange efficiency of cold air and the heat generation power of motor 1 are in a linear correspondence, thereby achieving precise closed-loop control of the thermal balance state of motor 1.

[0044] The exhaust pipe 24 can direct the hot air in the hollow shaft to a designated area, preventing heat from accumulating in local areas.

[0045] When the vehicle is not started, cold air is introduced into the motor 1. The cold air effectively removes moisture condensate and suspended particulate matter attached to the surface of the stator 12 and discharges it through the hollow shaft 2, extending the service life of the motor 1. Maintenance personnel can also check the cold air discharged from the hollow shaft 2. If the particle concentration or humidity value exceeds the preset threshold, the motor 1 can be repaired in advance.

[0046] Please refer to Figures 7-9 .

[0047] Multiple spaced first mounting seats 121 extend from the stator 12, and a first winding 13 is wound on the first mounting seat 121; a first wire 131 is installed on the hollow shaft 2, the first wire 131 is located inside the hollow shaft 2, one end of the first wire 131 passes through the hollow shaft 2, one end of the first wire 131 passes through the stator 12, the first wire 131 is fixedly connected to the stator 12, one end of the first wire 131 is electrically connected to the first winding 13, the other end of the first wire 131 passes through the hollow shaft 2, and the other end of the first wire 131 is located on the outside of the outer casing 11;

[0048] Furthermore, a second mounting base 122 extends from the first mounting base 121, and a second winding 14 is wound on the second mounting base 122; a second wire 141 is installed on the hollow shaft 2, the second wire 141 is located inside the hollow shaft 2, one end of the second wire 141 extends out of the hollow shaft 2, one end of the second wire 141 passes through the stator 12, the second wire 141 is fixedly connected to the stator 12, one end of the second wire 141 is electrically connected to the second winding 14, the other end of the second wire 141 extends out of the hollow shaft 2, and the other end of the second wire 141 is located on the outside of the outer casing 11;

[0049] Furthermore, the vent holes are oriented towards the second winding 14. Based on this structural configuration, since the second winding 14 is located on the outermost radial side of the stator 12, when cold air is directionally guided to the surface of the second winding 14 through the vent holes, it forms a directional flow towards the hollow shaft 2 located at the center of the outer casing 11. This flow path design allows the cold air to flow through the entire circumference of the stator 12, forming a heat exchange path covering the entire circumference of the stator 12, which significantly improves the uniformity of heat dissipation efficiency and the heat conduction effect.

[0050] When the vehicle is in the starting stage, since the motor 1 requires a large current and high power in the initial stage of starting, by synchronously conducting current to the first wire 131 and the second wire 141, the first winding 13 and the second winding 14 are made to run synchronously, so that the motor 1 switches to a high power output mode, which significantly improves the response efficiency of instantaneous output torque.

[0051] When the vehicle is traveling at a constant speed and the speed is less than 120km / h, it is only necessary to conduct current to the second winding 14 to drive the motor 1, thereby reducing power consumption and extending the vehicle's driving range.

[0052] By improving the insulation protection level of motor 1, its operating voltage threshold can be increased accordingly. Under constant power output conditions, increasing the supply voltage will significantly reduce the operating current of the first winding 13 and the second winding 14, while the operating resistance remains unchanged. This reduces the heat generated during the operation of the first winding 13 and the second winding 14, thereby reducing the operating temperature of motor 1 and reducing the energy loss of motor 1. At the same time, by optimizing the supply of cold air, motor 1 can be kept at a normal operating temperature, thereby reducing the energy consumption of cold air supply and improving the energy efficiency ratio of this motor.

[0053] When the vehicle is traveling at extremely high speeds, and the speed is greater than 120 km / h, the first winding 13 and the second winding 14 are energized at the same time, causing the motor 1 to enter high-power operation.

[0054] A PCB board 15 is fixedly connected to the stator 12. Multiple sensors 152 are electrically connected to the PCB board 15. In this embodiment, three sensors 152 are preferred. The three sensors 152 are respectively close to three of the second mounting seats 122, and the sensors 152 face the magnet 111. A third wire 151 is installed on the hollow shaft 2. The third wire 151 is located inside the hollow shaft 2. One end of the third wire 151 passes through the hollow shaft 2 and is electrically connected to the PCB board 15. The other end of the third wire 151 passes through the hollow shaft 2 and is located on the outside of the outer shell 11.

[0055] The rotation direction and speed of the outer casing 11 are determined by three sensors 152.

[0056] This utility model provides a hub motor with high-efficiency heat dissipation. The housing is fixedly connected to the hub in the prior art, and the connecting mechanism is fixedly connected to the vehicle. High-pressure cold air is introduced into the housing through the air intake pipe. When the cold air flows through the gap between the stator and the magnet, it absorbs heat. The heated air flows into the hollow shaft cavity through the exhaust hole on the hollow shaft and is finally discharged in a direction through the exhaust pipe, thereby cooling the inside of the motor and improving the efficiency of motor cooling.

[0057] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit the scope of protection of this utility model. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the essence and scope of the technical solutions of this utility model.

Claims

1. A hub motor with high-efficiency heat dissipation, characterized in that, include An electric motor, the electric motor including a housing, a plurality of magnets fixedly connected to the inner wall of the housing, a stator provided inside the housing, and the plurality of magnets surrounding the outer side of the stator; A hollow shaft, one end of which is inserted into the housing, is rotatably connected to the housing, and an exhaust hole is provided on the outer side of the hollow shaft, which is located inside the housing. The center of the stator is fixedly connected to the hollow shaft, and an air inlet pipe is installed on the hollow shaft, one end of which is located inside the housing, and the other end of which is located outside the housing. A connecting mechanism is fixedly connected to a hollow shaft, and the other end of the hollow shaft is connected to an exhaust pipe.

2. The hub motor with high-efficiency heat dissipation as described in claim 1, characterized in that, One end of the air intake pipe is connected to a connecting pipe, the connecting pipes are connected end to end, and the connecting pipes have multiple vent holes facing the stator.

3. A hub motor with high-efficiency heat dissipation as described in claim 2, characterized in that, The stator has a plurality of first mounting seats arranged at intervals, and a first winding is wound on the first mounting seats.

4. A hub motor with high-efficiency heat dissipation as described in claim 3, characterized in that, A second mounting base extends from the first mounting base, and a second winding is wound on the second mounting base.

5. A hub motor with high-efficiency heat dissipation as described in claim 4, characterized in that, A PCB board is fixedly connected to the stator, and multiple sensors are electrically connected to the PCB board.

6. A hub motor with high-efficiency heat dissipation as described in claim 5, characterized in that, The hollow shaft is equipped with a first wire, a second wire, and a third wire. One end of the first wire is electrically connected to the first winding, one end of the second wire is electrically connected to the second winding, and one end of the third wire is electrically connected to the PCB board. The other ends of the first wire, the second wire, and the third wire are all located on the outside of the outer casing.

7. A hub motor with high-efficiency heat dissipation as described in any one of claims 1 or 6, characterized in that, The connecting mechanism includes a connecting seat, a connecting plate, and an I-beam insulating pad. The connecting seat is fixedly connected to the hollow shaft. A connecting hole is provided on the connecting plate. The middle part of the I-beam insulating pad is inserted into the connecting hole. A screw is provided on the I-beam insulating pad. The screw passes through the I-beam insulating pad and is fixedly connected to the connecting seat.

8. A hub motor with high-efficiency heat dissipation as described in claim 7, characterized in that, Two nuts are detachably connected to the hollow shaft, the connecting seat is located between the two nuts, a pin is fixedly connected to the hollow shaft, a limit groove is provided on the connecting seat, and the pin is located in the limit groove.

Images