A motor built-in oil liquid recovery and exhaust device and a motor with the same

Abstract

A kind of motor built-in oil recovery and exhaust device and motor with the device belong to wheel power transmission technical field.Motor built-in oil recovery and exhaust device is drilled exhaust blind hole in the surface of the shaft body of motor shaft, exhaust passage is drilled in the other surface of the shaft body, one end of exhaust passage is communicated with the bottom of exhaust blind hole, the other end is located in the outer surface of motor shaft and communicated with the outside;Unidirectional exhaust valve and bending channel are installed on motor shaft.The utility model has the beneficial effects that: the blind hole and the downward inclined exhaust passage with outlet are opened on the rotating shaft in the motor, the oil is forced to flow back to the motor working chamber and is recovered, the device also directly discharges the air pressure in the motor to the outside with "zero distance", and truly achieves the purpose of only exhausting without oil leakage.

Description

Technical Field

[0001] A motor with built-in oil recovery and venting device and a motor with the device are disclosed, belonging to the field of wheel power transmission technology, and particularly relating to wheel power transmission devices for electric motorcycles and electric bicycles. Background Technology

[0002] Oil-cooled motors in electric vehicles require exhaust to balance the internal and external air pressure. Existing exhaust solutions involve either inserting a thin, long plastic tube inside the motor power cable leading to the outside of the motor, or installing a waterproof vent valve on the casing. However, the thin plastic tube presents space constraints, creating resistance during exhaust and preventing the continuous release of high-temperature, high-pressure air generated inside the motor. Furthermore, the exhaust process generates a small amount of steam and oil mist, which cannot be recovered due to the lack of an oil recovery device. The waterproof vent valve's high-density mesh core further hinders exhaust and lacks any oil recovery function. These factors are extremely detrimental to oil-cooled motors. To address this issue, the applicant previously filed a patent application for "A motor shaft combining exhaust and oil recovery, and a hub motor with the same shaft" (Patent No. ZL202320089896.X). Page 5 of the specification describes another oil recovery path: a large amount of oil is discharged from the motor working chamber 12 to the oil storage chamber 9 via the oil drain 5.3. Occasionally, a small amount of splashed oil will enter the inclined channel 7.2 under air pressure. When residual oil enters a short section of the inclined channel, due to the large diameter of the inclined channel (sufficient for oil backflow) and the angle difference, the oil is forced to flow back into the motor working chamber 12, thus completing the oil recovery process and achieving the goal of only venting exhaust without oil leakage. However, this inclined channel is located outside the motor, making it an external exhaust and recovery system. Such external exhaust recovery systems (including other existing external exhaust recovery systems) are firstly not dustproof or waterproof, making daily maintenance inconvenient; secondly, such devices are installed on the vehicle frame, requiring numerous parts and accessories, making assembly time-consuming, labor-intensive, and costly; and thirdly, the exhaust distance from the internal exhaust to the external system is long, resulting in poor exhaust flow. Utility Model Content

[0003] The problem this utility model aims to solve is to provide a device built into a motor, with a short exhaust distance, capable of thoroughly and cleanly recovering oil while efficiently and smoothly venting exhaust, and a motor incorporating this device. The technical solution is as follows:

[0004] An internal oil recovery and venting device for an electric motor includes a motor shaft and a stator. A stator support frame is also provided at the center of the stator. The stator is mounted on the motor shaft. The key technology is that a blind venting hole is drilled from the outside to the inside on the surface of the shaft at the other end of the motor shaft. A venting channel is drilled obliquely from the outside to the inside on the other surface of the shaft. One end of the venting channel is connected to the bottom of the blind venting hole, and the other end is located on the outer surface of the motor shaft and communicates with the outside. A one-way venting valve is installed on the motor shaft. The one-way venting valve includes an inlet end and an outlet end. The outlet end is installed in the blind venting hole. A bent channel is installed on the stator support frame near the one-way venting valve. One end of the bent channel is connected to the inlet end.

[0005] The bent channel can also be replaced with a protective recovery cover or a conical oil separator ring.

[0006] The motor includes a built-in oil recovery and venting device; it also includes an oil suspension and storage circulating cold oil chamber enclosed by the left cover of the motor, the outer rotor of the motor, and a cooling oil separation and circulation cover; and a motor working chamber enclosed by the right cover of the motor, the outer rotor of the motor, and a cooling oil separation and circulation cover. The motor working chamber and the oil suspension and storage circulating cold oil chamber are interconnected to form a cooling oil heat dissipation circulation system.

[0007] Compared with the prior art, the present invention has the following beneficial effects:

[0008] 1. This utility model features a blind hole and a downward-facing oblique exhaust channel on the shaft inside the motor, connecting to the outside of the motor. A one-way valve is installed inside the blind hole, and a bent channel is installed on the one-way valve. The bent channel and the oblique exhaust channel on the shaft combine to form a double-walled bent channel, replacing the vent pipe and corresponding components in the power cord, as well as the structural components matching the waterproof vent valve. This eliminates the need for other components of the oil-cooled motor and accessories mounted on the frame, making the overall structure more compact, saving time during assembly, and reducing manufacturing costs.

[0009] 2. The installation of the inclined tube and air pressure balance hole discharges and balances the air pressure inside the inclined tube. A small amount of splashed oil or oil particles that follow the steam pressure from the air inlet along the inclined tube will be forced to flow back into the motor working chamber for recycling. Similarly, the installation of the protective recovery cover or conical oil separator ring also completes the oil recycling. The device also directly discharges the internal air pressure from the double-bent channel to the outside of the machine with "zero distance", truly achieving the purpose of exhausting air without leaking oil.

[0010] 3. The one-way valve also prevents moisture from entering the motor from the outside air, thus avoiding the entry of air with floating dust and dirt into the motor to damage the cooling oil and reduce motor performance. It also achieves the effects of dustproofing and waterproofing.

[0011] 4. If the vehicle encounters water, especially deep water, the one-way valve core will sense the liquid and instantly and accurately close the valve, blocking all liquid outside the motor, providing excellent waterproof performance.

[0012] 5. All components of this device are located inside the machine, thus providing excellent protection and achieving the goal of maintenance-free operation.

[0013] 6. This utility model provides an excellent low-temperature working environment for electric vehicle motors. When the motor is in operation or under load, it significantly reduces the thermal attenuation effect caused by high motor temperature, avoids the phenomenon of motor overheating and power loss, greatly improves motor performance, and extends motor service life. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the built-in exhaust recovery device of this utility model; Figure 2 yes Figure 1 A partially enlarged structural diagram; Figure 3 This is a three-dimensional structural diagram of the built-in recovery exhaust device of this utility model; Figure 4 This is a three-dimensional structural assembly diagram of the built-in recovery exhaust device of this utility model; Figure 5 This is a cross-sectional view of the built-in channel of this utility model; Figure 6 This is a schematic diagram of the structure of the built-in recovery exhaust device for wheel hub motor of this utility model; Figure 7 yes Figure 6 A partially enlarged structural diagram; Figure 8 This is a schematic diagram of the three-dimensional structure of the cooling oil separation and circulation cover; Figure 9 This is a schematic diagram of another built-in exhaust recovery device of this utility model; Figure 10 yes Figure 9 A partially enlarged structural diagram; Figure 11 This is a three-dimensional structural assembly diagram of another built-in recovery exhaust device of this utility model; Figure 12 This is a schematic diagram of another built-in recovery exhaust device of this utility model used in a hub motor; Figure 13 yes Figure 12 A partially enlarged structural diagram; Figure 14 This is a schematic diagram of the structure of another built-in recovery exhaust device of this utility model; Figure 15 yes Figure 14A partially enlarged structural diagram; Figure 16 This is a three-dimensional structural assembly diagram of another built-in recovery exhaust device of this utility model; Figure 17 This is a three-dimensional structural assembly diagram of another built-in recovery exhaust device of this utility model from another direction; Figure 18 This is a schematic diagram of the structure of another built-in recovery exhaust device for a hub motor. Detailed Implementation

[0015] Example 1: See Figures 1-5 A motor-mounted oil recovery and venting device includes a motor shaft 3, a stator 1, and a stator support frame 1.1 at the center of the stator 1. The stator 1 is mounted on the motor shaft 3 through the center hole of the stator support frame 1.1. Motor windings 2 are arranged on the stator 1, and a cable 4 is led out to the outside of the motor through the outlet hole at one end of the motor shaft 3. The key technology involves drilling an exhaust blind hole 3.1 from the outside to the inside on the surface of the shaft at the other end of the motor shaft 3, and drilling an exhaust channel 3.2 obliquely from the outside to the inside on the other surface of the shaft. The exhaust channel 3.2 is set in an inclined position inside the motor shaft 3, with one end higher than the other. One end of the exhaust channel 3.2 is connected to the bottom of the exhaust blind hole 3.1, and the other end of the exhaust channel 3.2 is located on the outer surface of the motor shaft 3 and is connected to the outside. In this way, the exhaust blind hole 3.1 and the exhaust channel 3.2 form a "pipe" structure and are interconnected. A one-way exhaust valve 5 is installed on the motor shaft 3. The one-way exhaust valve 5 includes an air inlet end 5.1 and an exhaust end 5.2. The exhaust end 5.2 is installed inside the exhaust blind hole 3.1 and is connected to the outside atmosphere through the exhaust channel 3.2. A bent channel 6 is installed on the stator support frame 1.1 near the one-way exhaust valve 5. One end of the bent channel 6 is connected to the air inlet end 5.1 of the one-way exhaust valve 5.

[0016] like Figure 5 As shown, the bending channel 6 is an L-shaped bending structure consisting of an inclined tube 6.6 and a vertical tube 6.4. One end of the inclined tube 6.6 is an air inlet 6.2, and one end of the vertical tube 6.4 is an exhaust port 6.3. The exhaust port 6.3 is connected to the air inlet end 5.1 of the one-way exhaust valve 5.

[0017] The inclined pipe 6.6 is formed by the air inlet 6.2 being lower than the bend section 6.5.

[0018] A pressure balance hole 6.1 is opened on the inclined tube 6.6 near the bend section 6.5.

[0019] Example 2: like Figures 6-8As shown, a motor with a built-in oil recovery and venting device is disclosed. Its key technology includes the built-in oil recovery and venting device described in Embodiment 1, and also includes an outer rotor 8 and a hub steel ring 7. The hub steel ring 7 is welded and fixedly connected to the outer rotor 8, which is mounted on the stator 1. One end of the outer rotor 8 is fixedly connected to the left cover 9, and the other end is fixedly connected to the right cover 14. A magnet 12 is provided between the outer rotor 8 and the stator 1. A cooling oil separation circulation cover 11 is installed between the left cover 9 and the stator 1 for cooling oil separation. The circulation cover 11 has several oil inlet holes 11.1 in the radial direction and several oil outlet holes 11.2 in the circumferential position of the cooling oil separation circulation cover 11. The left cover 9 of the motor, the outer rotor 8 of the motor and the cooling oil separation circulation cover 11 together form an oil suspension storage circulation cold oil chamber 10. The right cover 14 of the motor, the outer rotor 8 of the motor and the cooling oil separation circulation cover 11 together form a motor working chamber 13. The motor working chamber 13 and the oil suspension storage circulation cold oil chamber 10 are interconnected through the oil inlet holes 11.1 and the oil outlet holes 11.2 to form a cooling oil heat dissipation circulation system.

[0020] The working principle of this embodiment is as follows: When the vehicle is stationary, the motor does not rotate, and the cooling oil inside the motor is stationary, with the oil level at the oil inlet 11.1. This allows the lower motor magnet 12, stator 1, and motor coil winding 2 to be immersed in the cooling oil. The amount of cooling oil added is proportional to the capacity of the motor working chamber 13 and the oil suspension storage circulation cooling oil chamber 10. When the vehicle is being ridden, the motor starts to rotate. Under the centrifugal force generated by the rotation of the outer rotor 8, the cooling oil inside the motor is rapidly discharged from the motor working chamber 13 through the oil outlet 11.2 into the oil suspension storage circulation cooling oil chamber 10. At the same time, the amount of cooling oil in the motor working chamber 13 decreases instantaneously because the discharge flow rate is greater than the inlet flow rate, forcing the cooling oil in the motor air gap to be discharged through the oil outlet 11.2. Therefore, the motor does not experience oil resistance. When the oil volume in the oil suspension storage circulating cold oil chamber 10 reaches a certain capacity, it flows back to the motor working chamber 13 through the oil inlet 11.1 to rapidly cool the motor windings 2, stator 1, and magnet plates 12. The cooled oil, after absorbing heat, is then discharged through the oil outlet 11.2 into the oil suspension storage circulating cold oil chamber 10 under centrifugal force to fill the next cycle. As the mileage increases or during uphill driving with heavy loads, the internal temperature of the motor continues to rise. When a certain threshold is reached, pressure is generated inside the motor. At this time, the internal air pressure is higher than the external atmospheric pressure, and the motor's built-in channel for oil recovery and exhaust begins to operate. Because the exhaust port 6.3 of the bent channel 6 is connected to the intake end 5.1 of the normally closed one-way exhaust valve 5, the exhaust port 6.3 is effectively closed. The section of the channel up to the intake port 6.2 is almost in a semi-vacuum state, so the air pressure in this section is lower than the pressure at the intake port 6.2. Without adjustment, the oil in the inclined tube 6.6 will not automatically flow back into the motor chamber. Furthermore, oil particles that rise along the inclined tube 6.6 with steam pressure will not flow back into the motor chamber; instead, they will be expelled by the steam pressure inside the machine, causing oil leakage. The air pressure balance hole 6.1 regulates and balances the air pressure inside the inclined tube 6.6. When a small amount of splashed oil enters the inclined tube 6.6 from the air inlet 6.2, or when oil particles rise along the inclined tube 6.6 from the air inlet 6.2 with steam pressure, the inclined tube 6.6 is tilted downwards with the air inlet 6.2 facing downwards, and its inner diameter is sufficient for oil to flow back. Combined with the air pressure balance hole 6.1's adjustment of the air pressure balance between the inclined tube 6.6 and the air inlet 6.2, the atmospheric pressure inside the inclined tube 6.6 becomes equal, forcing the oil to flow back into the motor chamber 13. This cycle completes the oil recovery process. When venting is required, the air pressure release path is: motor working chamber 13 → air inlet 6.2 → exhaust port 6.3 → air inlet end 5.1 → exhaust end 5.2 → exhaust blind hole 3.1 → exhaust passage 3.2. This releases the internal air pressure and heat to the outside air, balancing the internal and external air pressures of the motor and protecting the normal circulation of the motor cooling oil, preventing leakage and truly achieving the goal of venting without oil leakage. Therefore, air inlet 6.2 serves as both an oil and gas inlet and an oil recovery outlet.

[0021] If the vehicle encounters sudden flooding, especially deep submersion, the one-way valve core senses the liquid and instantly and precisely closes the valve, blocking all liquid from entering the motor. This achieves multiple functions including dustproofing, waterproofing, unobstructed venting, and oil recovery, with a protection rating of IP68 or higher.

[0022] Example 3: See Figures 9-11 A motor-embedded oil recovery and venting device includes a motor shaft 3, a stator 1, and a stator support frame 1.1 at the center of the stator 1. The stator 1 is mounted on the motor shaft 3 through the central hole of the stator support frame 1.1. Motor windings 2 are arranged on the stator 1, and a cable 4 is led out to the outside of the motor through an outlet hole at one end of the motor shaft 3. The key technology is that a blind venting hole 3.1 is drilled from the outside to the inside on the shaft surface at the other end of the motor shaft 3, and a venting channel 3.2 is drilled obliquely from the outside to the inside on the other surface of the shaft. One end of the venting channel 3.2 is connected to the bottom of the blind venting hole 3.1, and the other end of the venting channel is located on the outer surface of the motor shaft 3 and communicates with the outside. A one-way venting valve 5 is installed on the motor shaft 3. The venting end 5.2 of the one-way venting valve 5 is installed in the blind venting hole 3.1, and the other end of the one-way venting valve 5 is the inlet end 5.1. A protective recovery cover 15 is mounted on the one-way venting valve 5 and fixed to the stator support frame 1.1.

[0023] There is a first air gap passage 16 between the one-way exhaust valve 5 and the protective recovery cover 15.

[0024] Example 4: like Figure 12 , Figure 13 As shown, a motor with a built-in oil recovery and exhaust device is described in embodiment three. Its key technology includes the built-in oil recovery and exhaust device, as described in embodiment three, and also includes an outer rotor 8 and a hub steel ring 7. The hub steel ring 7 is welded and fixed to the outer rotor 8, which is mounted on the stator 1. One end of the outer rotor 8 is fixed to the left cover 9, and the other end is fixed to the right cover 14. A cooling oil separation and circulation cover 11 is installed between the left cover 9 and the stator 1. The left cover 9, the outer rotor 8, and the cooling oil separation and circulation cover 11 together form an oil suspension storage and circulation cold oil chamber 10. The right cover 14, the outer rotor 8, and the cooling oil separation and circulation cover 11 together form a motor working chamber 13. The motor working chamber 13 and the oil suspension storage and circulation cold oil chamber 10 are interconnected to form a cooling oil heat dissipation and circulation system.

[0025] The working principle of this embodiment is as follows: When the vehicle is stationary, the motor does not rotate, and the cooling oil inside the motor is stationary, with the oil level at the oil inlet 11.1. This allows the lower motor magnet 12, stator 1, and motor coil winding 2 to be immersed in the cooling oil. The amount of cooling oil added is proportional to the capacity of the motor working chamber 13 and the oil suspension storage circulation cooling oil chamber 10. When the vehicle is being ridden, the motor starts to rotate. Under the centrifugal force generated by the rotation of the outer rotor 8, the cooling oil inside the motor is rapidly discharged from the motor working chamber 13 through the oil outlet 11.2 into the oil suspension storage circulation cooling oil chamber 10. At the same time, the amount of cooling oil in the motor working chamber 13 decreases instantaneously because the discharge flow rate is greater than the inlet flow rate, forcing the cooling oil in the motor air gap to be discharged through the oil outlet 11.2. Therefore, the motor does not experience oil resistance. When the oil volume in the oil suspension storage circulating cooling oil chamber 10 reaches a certain capacity, it flows back into the motor working chamber 13 through the oil inlet 11.1 to rapidly cool the motor windings 2, stator 1, and magnets 12. The cooled oil, after absorbing heat, is then discharged back into the oil suspension storage circulating cooling oil chamber 10 through the oil outlet 11.2 under centrifugal force to fill the next cycle. As the mileage increases or during uphill driving with heavy loads, the internal temperature of the motor continues to rise. When a certain threshold is reached, pressure is generated inside the motor, and the internal air pressure is higher than the external atmospheric pressure. At this time, the motor's built-in channel for oil recovery and the exhaust device begin to operate. Because the protective recovery cover 15 is vertically installed, when the oil enters the first air gap channel 16, it immediately slides down into the motor working chamber 13 under gravity, thus completing the oil recovery cycle. When exhaust is required, the air pressure relief path is: motor working chamber 13 → first air gap channel 16 → air inlet end 5.1 → exhaust end 5.2 → exhaust blind hole 3.1 → exhaust channel 3.2, which discharges the internal air pressure and heat to the outside air, so that the internal and external air pressure of the motor are balanced, protecting the normal circulation of motor cooling oil and preventing leakage, thus truly achieving the purpose of exhausting without leaking oil.

[0026] Example 5: See Figures 14-17A motor-mounted oil recovery and venting device includes a motor shaft 3, a stator 1, and a stator support frame 1.1 at the center of the stator 1. The stator 1 is mounted on the motor shaft 3 through the center hole of the stator support frame 1.1. Motor windings 2 are arranged on the stator 1. A cable 4 is led out to the outside of the motor through the outlet hole at one end of the motor shaft 3. A right motor cover 14 is installed at one end of the motor shaft 3, and the center hole of the right motor cover 14 passes through the motor shaft 3. The key technology involves fitting a first conical oil separator ring 17 and a second conical oil separator ring 14.1 onto the motor shaft 3 between the stator support frame 1.1 and the right motor cover 14. The center hole 17.1 of the first conical oil separator ring 17 passes through the motor shaft 3. The second conical oil separator ring 14.1 is positioned radially on the right motor cover 14 and is integrally die-cast with the right motor cover. The conical diameter of the first conical oil separator ring 17 is smaller than that of the second conical oil separator ring 14.1. The conical surfaces of the first and second conical oil separator rings face each other, and the conical surface of the first conical oil separator ring 17 is fitted onto the conical surface of the second conical oil separator ring 14.1. A second air gap channel 16.1 is provided between the two conical surfaces. The space formed between the second conical oil separator ring 14.1 and the first conical oil separator ring 17 constitutes an oil separator chamber 18. An exhaust blind hole 3.1 is drilled from the outside to the inside on the shaft surface of the motor shaft 3 inside the oil separator chamber 18. An exhaust channel 3.2 is drilled obliquely from the outside to the inside on the other surface of the shaft. One end of the exhaust channel 3.2 is connected to the bottom of the exhaust blind hole 3.1, and the other end of the exhaust channel is located on the outer surface of the motor shaft 3 and communicates with the outside. A one-way exhaust valve 5 is installed on the motor shaft 3. The exhaust end 5.2 of the one-way exhaust valve 5 is installed in the exhaust blind hole 3.1, and the other end of the one-way exhaust valve 5 is the air inlet end 5.1.

[0027] Example 6: like Figure 18 As shown, a motor with a built-in oil recovery and exhaust device is described in embodiment five. The key technology includes the built-in oil recovery and exhaust device, as described in embodiment five, and also includes an outer rotor 8 and a hub steel ring 7. The hub steel ring 7 is welded and fixed to the outer rotor 8, which is mounted on the stator 1. One end of the outer rotor 8 is fixed to the left cover 9, and a cooling oil separation circulation cover 11 is installed between the left cover 9 and the stator 1. The left cover 9, the outer rotor 8, and the cooling oil separation circulation cover 11 together form an oil suspension storage circulation cold oil chamber 10. The right cover 14, the outer rotor 8, and the cooling oil separation circulation cover 11 together form a motor working chamber 13. The motor working chamber 13 and the oil suspension storage circulation cold oil chamber 10 are interconnected to form a cooling oil heat dissipation circulation system.

[0028] The working principle of this embodiment is as follows: When the vehicle is stationary, the motor does not rotate, and the cooling oil inside the motor is stationary, with the oil level at the oil inlet 11.1. This allows the lower motor magnet 12, stator 1, and motor coil winding 2 to be immersed in the cooling oil. The amount of cooling oil added is proportional to the capacity of the motor working chamber 13 and the oil suspension storage circulation cooling oil chamber 10. When the vehicle is being ridden, the motor starts to rotate. When the motor speed is low under a certain load, the cooling oil inside the motor is rapidly discharged from the motor working chamber 13 through the oil outlet 11.2 into the oil suspension storage circulation cooling oil chamber 10 under the centrifugal force generated by the rotation of the outer rotor 8. At the same time, the amount of cooling oil in the motor working chamber 13 decreases instantaneously because the discharge flow rate is greater than the inlet flow rate, forcing the cooling oil in the motor air gap to be discharged through the oil outlet 11.2. Therefore, the motor does not experience oil resistance. When the oil volume in the oil suspension storage circulating cooling oil chamber 10 reaches a certain capacity, it flows back into the motor working chamber 13 through the oil inlet 11.1 to rapidly cool the motor windings 2, stator 1, and magnets 12. The cooled oil, after absorbing heat, is then discharged into the oil suspension storage circulating cooling oil chamber 10 through the oil outlet 11.2 under centrifugal force to fill the next cycle. When the vehicle is driving or climbing a hill under heavy load, the motor current increases sharply, and the internal temperature of the motor continues to rise. When a certain threshold is reached, pressure is generated inside the motor. At this time, the internal air pressure is higher than the external atmospheric pressure, and the motor's built-in channel for oil recovery and exhaust begins to work. The oil in the oil separator 18 is sprayed into the motor working chamber 13 under the centrifugal force of the rotating second conical oil separator ring 14.1, thus completing the oil recovery. When exhaust is required, the air pressure relief path is: motor working chamber 13 → second air gap channel 16.1 → oil separator 18 → air inlet end 5.1 → exhaust end 5.2 → exhaust blind hole 3.1 → exhaust channel 3.2, which discharges the internal air pressure and heat to the outside air, so as to balance the internal and external air pressure of the motor, protect the normal circulation of motor cooling oil, prevent leakage, and truly achieve the purpose of exhausting without leaking oil.

[0029] This device is also suitable for internal rotor motors.

Claims

1. A motor-embedded oil recovery and venting device, comprising a motor shaft (3) and a stator (1), wherein a stator support frame (1.1) is provided at the center of the stator (1), and the stator (1) is mounted on the motor shaft (3), characterized in that... A blind exhaust hole (3.1) is drilled from the outside to the inside on the shaft surface at the other end of the motor shaft (3). An exhaust channel (3.2) is drilled obliquely from the outside to the inside on the other surface of the shaft. One end of the exhaust channel (3.2) is connected to the bottom of the blind exhaust hole (3.1), and the other end is located on the outer surface of the motor shaft (3) and communicates with the outside. A one-way exhaust valve (5) is installed on the motor shaft (3). The one-way exhaust valve (5) includes an air inlet end (5.1) and an exhaust end (5.2). The exhaust end (5.2) is installed in the blind exhaust hole (3.1). A bending channel (6) is installed on the stator support frame (1.1) near the one-way exhaust valve (5). One end of the bending channel (6) is connected to the air inlet end (5.1).

2. The built-in oil recovery and exhaust device of the motor according to claim 1 is characterized in that the bending channel (6) is an L-shaped bending structure consisting of an inclined tube (6.6) and a vertical tube (6.4), one end of the inclined tube (6.6) is an air inlet (6.2), one end of the vertical tube (6.4) is an exhaust port (6.3), and the exhaust port (6.3) is connected to the air inlet (5.1) of the one-way exhaust valve (5).

3. The built-in oil recovery and venting device for the motor according to claim 1, characterized in that: The inclined pipe (6.6) is a pipe in which the air inlet (6.2) is lower than the bend section (6.5) to form an inclined shape.

4. The built-in oil recovery and venting device for the motor according to claim 1, characterized in that... An air pressure balance hole (6.1) is opened on the inclined tube (6.6) near the bend section (6.5).

5. An electric motor, comprising the built-in oil recovery and venting device as described in claim 1, characterized in that: It also includes an outer rotor (8) of the motor and a hub steel ring (7). The hub steel ring (7) is fixedly connected to the outer rotor (8) of the motor. The outer rotor (8) of the motor is mounted on the stator (1). One end of the outer rotor (8) of the motor is fixedly connected to the left cover (9) of the motor, and the other end is fixedly connected to the right cover (14) of the motor. A cooling oil separation circulation cover (11) is installed between the left cover (9) of the motor and the stator (1). The left cover (9), the outer rotor (8) of the motor and the cooling oil separation circulation cover (11) together form an oil suspension storage circulation cold oil chamber (10). The right cover (14), the outer rotor (8) of the motor and the cooling oil separation circulation cover (11) together form a motor working chamber (13). The motor working chamber (13) and the oil suspension storage circulation cold oil chamber (10) are interconnected to form a cooling oil heat dissipation circulation system.

6. A motor-embedded oil recovery and venting device, comprising a motor shaft (3) and a stator (1), wherein a stator support frame (1.1) is provided at the center of the stator (1), and the stator (1) is mounted on the motor shaft (3), characterized in that... A blind vent hole (3.1) is drilled from the outside to the inside on the shaft surface at the other end of the motor shaft (3). An vent passage (3.2) is drilled obliquely from the outside to the inside on the other surface of the shaft. One end of the vent passage (3.2) is connected to the bottom of the blind vent hole (3.1), and the other end is located on the outer surface of the motor shaft (3) and communicates with the outside. A one-way vent valve (5) is installed on the motor shaft (3). The vent end (5.2) of the one-way vent valve (5) is installed in the blind vent hole (3.1). The other end of the one-way vent valve (5) is the inlet end (5.1). A protective recovery cover (15) is fitted on the one-way vent valve (5).

7. The built-in oil recovery and venting device for the motor according to claim 6, characterized in that: There is a first air gap passage (16) between the one-way exhaust valve (5) and the protective recovery cover (15).

8. An electric motor, comprising the built-in oil recovery and venting device as described in claim 6, characterized in that: The motor's built-in oil recovery and exhaust device has an exhaust blind hole (3.1) drilled from the outside to the inside on the shaft surface at the other end of the motor shaft (3), and an exhaust channel (3.2) drilled obliquely from the outside to the inside on the other surface of the shaft. One end of the exhaust channel (3.2) is connected to the bottom of the exhaust blind hole (3.1), and the other end is located on the outer surface of the motor shaft (3) and communicates with the outside. A one-way exhaust valve (5) is installed on the motor shaft (3). The exhaust end (5.2) of the one-way exhaust valve (5) is installed in the exhaust blind hole (3.1), and the other end of the one-way exhaust valve (5) is the air inlet end (5.1). A protective recovery cover (15) is fitted on the one-way exhaust valve (5). It also includes an outer rotor (8) of the motor and a hub steel ring (7). The steel ring (7) is fixedly connected to the motor outer rotor (8), and the motor outer rotor (8) is fitted onto the stator (1); one end of the motor outer rotor (8) is fixedly connected to the motor left cover (9), and the other end is fixedly connected to the motor right cover (14); a cooling oil separation circulation cover (11) is installed between the motor left cover (9) and the stator (1); the motor left cover (9), the motor outer rotor (8) and the cooling oil separation circulation cover (11) together form an oil suspension storage circulation cold oil chamber (10), and the motor right cover (14), the motor outer rotor (8) and the cooling oil separation circulation cover (11) together form a motor working chamber (13). The motor working chamber (13) and the oil suspension storage circulation cold oil chamber (10) are interconnected to form a cooling oil heat dissipation circulation system.

9. A motor-embedded oil recovery and venting device, comprising a motor shaft (3) and a stator (1), wherein a stator support frame (1.1) is provided at the center of the stator (1), the stator (1) is mounted on the motor shaft (3), and a right motor cover (14) is installed at one end of the motor shaft (3); characterized in that A first conical oil separator ring (17) and a second conical oil separator ring (14.1) are fitted on the motor shaft (3) between the stator support frame (1.1) and the right cover of the motor (14). The conical surfaces of the first conical oil separator ring (17) and the second conical oil separator ring (14.1) are arranged facing each other. The conical surface of the first conical oil separator ring (17) is fitted into the conical surface of the second conical oil separator ring (14.1). There is a second air gap channel (16.1) between the two conical surfaces. The space formed between the second conical oil separator ring (14.1) and the first conical oil separator ring (17) constitutes an oil separator chamber (16.1). 8) A blind exhaust hole (3.1) is drilled from the outside to the inside on the surface of the motor shaft (3) in the oil separator (18). An exhaust channel (3.2) is drilled obliquely from the outside to the inside on the other surface of the shaft. One end of the exhaust channel (3.2) is connected to the bottom of the blind exhaust hole (3.1), and the other end of the exhaust channel is located on the outer surface of the motor shaft (3) and communicates with the outside. A one-way exhaust valve (5) is installed on the motor shaft (3). The exhaust end (5.2) of the one-way exhaust valve (5) is installed in the blind exhaust hole (3.1), and the other end of the one-way exhaust valve (5) is the intake end (5.1).

10. An electric motor, comprising the built-in oil recovery and venting device as described in claim 9, characterized in that: The motor's built-in oil recovery and venting device consists of a first conical oil separator ring (17) and a second conical oil separator ring (14.1) mounted on the motor shaft (3) between the stator support frame (1.1) and the right cover (14). The conical surfaces of the first conical oil separator ring (17) and the second conical oil separator ring (14.1) face each other. The conical surface of the first conical oil separator ring (17) is fitted into the conical surface of the second conical oil separator ring (14.1), and a second air gap channel (1) is formed between the two conical surfaces. 6.1) The space formed between the second conical oil separator ring (14.1) and the first conical oil separator ring (17) constitutes an oil separator chamber (18). A blind vent hole (3.1) is drilled from the outside to the inside on the shaft surface of the motor shaft (3) inside the oil separator chamber (18). An exhaust channel (3.2) is drilled obliquely from the outside to the inside on the other surface of the shaft. One end of the exhaust channel (3.2) is connected to the bottom of the blind vent hole (3.1), and the other end of the exhaust channel is located on the outer surface of the motor shaft (3) and is connected to the outside. The motor shaft (3) is equipped with a one-way exhaust valve (5). The exhaust end (5.2) of the one-way exhaust valve (5) is installed in the exhaust blind hole (3.1), and the other end of the one-way exhaust valve (5) is the intake end (5.1). The motor shaft (3) is also equipped with an outer rotor (8) and a hub steel ring (7). The hub steel ring (7) is fixedly connected to the outer rotor (8). The outer rotor (8) is mounted on the stator (1). One end of the outer rotor (8) is fixedly connected to the left cover (9) of the motor. A cooling oil separation circulation cover (11) is installed between the motor and the stator (1); the left cover (9), the outer rotor (8) of the motor and the cooling oil separation circulation cover (11) together form an oil suspension storage circulation cold oil chamber (10); the right cover (14), the outer rotor (8) of the motor and the cooling oil separation circulation cover (11) together form a motor working chamber (13); the motor working chamber (13) and the oil suspension storage circulation cold oil chamber (10) are interconnected to form a cooling oil heat dissipation circulation system.

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