Exhaust and Drain Valve, Motor, New Energy Vehicle

Abstract

The present invention provides an exhaust and drainage valve, a motor, and a new energy vehicle. The exhaust and drainage valve includes a receiving cavity formed between a first housing and a second housing after being fastened together. A floating valve core is arranged in the receiving cavity. The first housing has a first through hole, and the second housing has a second through hole communicating with a target space. The floating valve core has a cut-off position for sealing the second through hole and a communicating position for communicating the first through hole with the second through hole. The floating valve core realizes the switching between the cut-off position and the communicating position depending on the magnitude of the buoyancy on its first end face, the pressure on its second end face, and its own gravity. According to the present invention, when the accumulated water in the motor reaches a certain amount and the sum of the pressure exerted by the accumulated water on the floating valve core and the gravity of the floating valve core is greater than the buoyancy force received by the floating valve core, the floating valve core will move downward to the communicating position, and then the accumulated water in the motor will be discharged through the first through hole, thereby realizing automatic drainage of the motor and eliminating the need for manually unscrewing the waterproof bolt for drainage.

Description

Technical Field

[0001] The present invention belongs to the technical field of new energy vehicles, and specifically relates to an exhaust and drain valve, a motor, and a new energy vehicle. Background Art

[0002] With the rapid development of permanent magnet motors for new energy vehicles, the application environments of these motors are also expanding. In many cases, motors must be able to operate in harsh environments, such as heavy rain and humid weather. This poses a risk of water ingress to the motor. If this water is not promptly drained, it can lead to faulty stator insulation, bearing rust and seizure, and in severe cases, motor burnout and failure. Current drainage designs for new energy motors employ a waterproof bolt at the very bottom of the motor housing. However, this requires manual operation. If water is detected inside the motor, the bolt is unscrewed to drain the accumulated water. This approach clearly has certain inaccuracies. For example, if water ingress is not detected and the bolt is not promptly unscrewed to drain the water, water can accumulate inside the motor, causing motor malfunctions. Furthermore, during motor operation, the motor generates internal heat, generating high-temperature, high-pressure gases. A waterproof vent valve is installed on the motor end cap to allow the high-temperature, high-pressure gases to escape through it. However, the exhaust flow rate of the vent valve is limited, requiring a long time for the gas to be discharged and for pressure to be balanced between the motor interior and the outside world. When encountering harsh environments, such as when the vent holes of the waterproof vent valve are blocked or soaked in water, the ventilation will fail, and the high-temperature and high-pressure gas inside the motor cannot be discharged. At this time, if water vapor enters the motor, it will not be able to be discharged. After the motor cools down, water will accumulate. When the accumulated water reaches a certain amount, it will cause poor insulation of the motor stator, rust and jamming of the bearings, and other abnormalities. Summary of the Invention

[0003] Therefore, the present invention provides an exhaust and drain valve that can overcome the certain deviation in human judgment of whether water has entered the motor. When water enters the motor and is not discovered in time to unscrew the waterproof bolt to drain the water, water will accumulate in the motor. When the accumulated water reaches a certain amount, it will cause abnormal problems in the motor.

[0004] To solve the above problems, the present invention provides an exhaust and drainage valve, comprising: a first housing and a second housing that are snap-fitted together. An accommodation cavity is formed between the first housing and the second housing after snap-fitting. A floating valve core is arranged in the accommodation cavity. The first housing has a first through hole communicating with its external environment, and the second housing has a second through hole communicating with a target space. The floating valve core has a cut-off position for sealing the second through hole and a communication position for communicating the first through hole and the second through hole. The floating valve core also has a first end face close to the first housing and a second end face far from the first housing. The floating valve core realizes the switching between the cut-off position and the communication position depending on the buoyancy of the first end face, the pressure of the second end face, and the magnitude of its own gravity.

[0005] In some embodiments, the cross-sectional area of the second through hole gradually increases from top to bottom. The floating valve core has a blocking portion that matches the second through hole.

[0006] In some embodiments, the floating valve core further has a weight-increasing portion connected to the blocking portion, and the weight-increasing portion is located below the blocking portion.

[0007] In some embodiments, the second housing further has a water collecting cavity. Both ends of the water collecting cavity have openings. The bottom wall of the water collecting cavity communicates with the second through hole, and the other end communicates with the target space.

[0008] In some embodiments, the first housing and the second housing are threadedly connected.

[0009] In some embodiments, a sealing member is arranged at the mating position of the first housing and the second housing.

[0010] In some embodiments, the first housing further has a side wall. A water flow channel extending along its height direction is constructed inside the side wall. A first water passing hole and a second water passing hole are constructed on the side wall. The second water passing hole is above the first water passing hole. One end of the first water passing hole communicates with the accommodation cavity, and the other end communicates with the water flow channel. One end of the second water passing hole communicates with the water flow channel, and the other end communicates with the outside of the first housing.

[0011] The present invention also provides a motor, comprising the above exhaust and drainage valve.

[0012] In some embodiments, the motor has a housing. The exhaust and drainage valve is detachably connected to the housing through the second housing, and the exhaust and drainage valve is located at the bottom of the housing.

[0013] The present invention also provides a new energy vehicle, comprising the above motor.

[0014] The present invention provides an exhaust and drainage valve, a motor, and a new energy vehicle. When there is accumulated water in the motor, the accumulated water will gather at the position where the exhaust and drainage valve is located and exert a pressure on the second end face of the floating valve core. When the accumulated water reaches a certain amount such that the sum of the pressure exerted on the floating valve core and the self-gravity of the floating valve core is greater than the buoyancy force received by the floating valve core from the first end face, the floating valve core will move downward. When the floating valve core moves to the communication position, the first through hole, the accommodation cavity, and the second through hole are sequentially communicated, and then the accumulated water in the motor will flow into the accommodation cavity through the second through hole and be discharged to the outside of the motor through the first through hole, thereby realizing the automatic discharge of the accumulated water in the motor, solving the problems that there are certain deviations in the artificial judgment of whether the motor is flooded and that if the artificial detection fails to find the accumulated water in the motor and the accumulated water is not discharged in time, resulting in motor abnormalities, and effectively increasing the service life of the motor. Description of the Drawings

[0015] Figure 1 It is a cross-sectional view of the exhaust and drainage valve in the first state of the first embodiment of the present invention;

[0016] Figure 2 It is a cross-sectional view of the exhaust and drainage valve in the second state of the first embodiment of the present invention;

[0017] Figure 3 It is a cross-sectional view of the exhaust and drainage valve in the third state of the first embodiment of the present invention;

[0018] Figure 4 It is an exploded view of the exhaust and drainage valve of the first embodiment of the present invention;

[0019] Figure 5 It is a structural schematic diagram of the second housing of the exhaust and drainage valve of the first embodiment of the present invention;

[0020] Figure 6 It is a structural schematic diagram of the floating valve core of the exhaust and drainage valve of the first embodiment of the present invention;

[0021] Figure 7 It is a structural schematic diagram of the first housing of the exhaust and drainage valve of the first embodiment of the present invention;

[0022] Figure 8 It is a cross-sectional view of the exhaust and drainage valve in the first state of the second embodiment of the present invention;

[0023] Figure 9 It is a cross-sectional view of the exhaust and drainage valve in the second state of the second embodiment of the present invention;

[0024] Figure 10 It is a cross-sectional view of the exhaust and drainage valve in the third state of the second embodiment of the present invention;

[0025] Figure 11 It is a structural schematic diagram of the first housing of the exhaust and drainage valve of the second embodiment of the present invention;

[0026] Figure 12 A cross-sectional view of the motor according to an embodiment of the present invention;

[0027] Figure 13 is Figure 12 An enlarged schematic view of portion A of the motor according to an embodiment of the present invention in

[0028] The reference numerals are shown as:

[0029] 1. First housing; 2. Second housing; 3. Accommodating cavity; 4. Floating valve core; 41. Sealing portion; 42. Weight increasing portion; 5. First through hole; 6. Second through hole; 7. Water collecting cavity; 8. Sealing member; 9. Water flow passage; 10. First water passing hole; 11. Second water passing hole; 12. Machine housing. Detailed implementation manners

[0030] Refer to in combination Figures 1 to 13As shown, according to an embodiment of the present invention, an exhaust and drainage valve is provided, including: a first housing 1 and a second housing 2 that are buckled with each other. An accommodation chamber 3 is formed between the buckled first housing 1 and the second housing 2. A floating valve core 4 is arranged in the accommodation chamber 3. The first housing 1 has a first through hole 5 communicating with its external environment, and the second housing 2 has a second through hole 6 communicating with the target space. The floating valve core 4 has a cut-off position for sealing the second through hole 6 and a communication position for communicating the first through hole 5 and the second through hole 6. The floating valve core 4 also has a first end face close to the first housing 1 and a second end face far from the first housing 1. The floating valve core 4 realizes the switching between the cut-off position and the communication position depending on the magnitude of the buoyancy of the first end face, the pressure of the second end face, and its own gravity. In this technical solution, when the exhaust and drainage valve of the present application is used on a motor, the inside of the motor is the target space. The exhaust and drainage valve needs to be communicated with the inside of the motor, and at the same time, it is necessary to ensure that the exhaust and drainage valve is at the bottom of the motor. When there is accumulated water in the motor, the accumulated water will gather at the position where the exhaust and drainage valve is located and apply pressure to the second end face of the floating valve core 4. When the accumulated water reaches a certain amount such that the sum of the pressure exerted on the floating valve core 4 and the self-gravity of the floating valve core 4 is greater than the buoyancy received by the floating valve core 4 from the first end face, the floating valve core 4 will move downward. When the floating valve core 4 moves to the communication position, the first through hole 5, the accommodation chamber 3, and the second through hole 6 are sequentially communicated. Then, the accumulated water in the motor will flow into the accommodation chamber 3 through the second through hole 6 and be discharged to the outside of the motor through the first through hole 5, thereby realizing the automatic discharge of the accumulated water in the motor, solving the problems that there are certain deviations in the artificial judgment of whether the inside of the motor is flooded and the motor is abnormal due to the failure to find and drain the accumulated water in the motor in time, and effectively increasing the service life of the motor. At the same time, during the operation of the motor, the inside of the motor will generate heat, thereby forming high-temperature and high-pressure gas inside it. The high-temperature and high-pressure gas will also apply pressure to the floating valve core 4, making it easier for the floating valve core 4 to sink, which is beneficial to the discharge of the accumulated water in the motor. Further, when the drainage causes the water level in the accommodation chamber to be lower than the height of the first through hole 5, the high-temperature and high-pressure gas will also be automatically discharged from the first through hole 5. Therefore, the exhaust and drainage valve of the present application can simultaneously replace the waterproof bolt and the waterproof breather valve, which makes the motor installed with the exhaust and drainage valve of the present application also have the advantages of simple structure, easy operation, and reduced material usage. When the motor is in a humid environment or wading, the external water will flow into the accommodation chamber through the first through hole 5. As the water level in the accommodation chamber rises, the floating valve core 4 will move upward under the action of buoyancy. When the water in the accommodation chamber reaches the predetermined water level, the floating valve core 4 will return to the cut-off position for sealing the second through hole 6, isolating the inside of the motor from the outside world. Therefore, the exhaust and drainage valve of the present application also has the function of preventing external water from entering the motor.

[0031] Refer to in combination Figure 4As shown, the cross-sectional area of the second through hole 6 gradually increases from top to bottom. The floating valve core 4 has a blocking portion 41, and the blocking portion 41 matches the second through hole 6. When the floating valve core 4 is completely inserted into the second through hole 6 under the buoyancy of water, the floating valve core 4 will no longer move upward. This enables the second through hole 6 to limit the floating valve core 4, ultimately achieving the sealing of the second through hole 6 by the floating valve core 4. When the blocking portion 41 of the floating valve core 4 seals the second through hole 6, if there is still water entering the accommodation cavity through the first through hole 5 externally, it will only increase the buoyancy force on the floating valve core 4, making the blocking portion 41 fit more tightly with the second through hole 6 and improving the sealing effect.

[0032] Referring to Figures 1 to 3 As shown, the floating valve core 4 also has a weight-increasing portion 42 connected to the blocking portion 41, and the weight-increasing portion 42 is located below the blocking portion 41. In a specific embodiment, the cross-sectional area of the weight-increasing portion 42 is larger than the maximum cross-sectional area of the blocking portion 41. The weight-increasing portion 42 can increase the gravity of the floating valve core 4, making it easier for the floating valve core 4 to sink. It can be understood that the material of the weight-increasing portion at this time can be the same as that of the blocking portion 41. In some other embodiments, they can also be different, based on the standard that the buoyancy force on the first end face of the floating valve core 4 can float it.

[0033] Referring to Figures 1 to 3 As shown, the second housing 2 also has a water collecting cavity 7. Both ends of the water collecting cavity 7 have openings. The bottom wall of the water collecting cavity 7 is communicated with the second through hole 6, and the other end is communicated with the target space. The water collecting cavity 7 is located above the second through hole 6. When the blocking portion 41 of the floating valve core 4 is completely inserted into the second through hole 6, the top surface of the blocking portion 41 and the water collecting cavity 7 cooperate to form a chamber capable of storing water. Since the exhaust and drainage valve is at the bottom of the motor, if there is accumulated water in the motor, it will collect in the water collecting cavity 7, thus making the internal power consumption of the motor safer. At the same time, the accumulated water in the water collecting cavity 7 will also exert pressure on the floating valve core 4. Together with the high-temperature and high-pressure gas inside the motor, it further makes it easier for the floating valve core 4 to be pressured and sink, thereby facilitating the discharge of the accumulated water.

[0034] Figures 1 to 3 The following shows the working process of the exhaust and drainage valve in the first embodiment of this application. Assume that the pressure exerted on the floating valve core 4 by the accumulated water is N, the self-gravity of the floating valve core 4 is G, and the buoyancy force on the floating valve core 4 is F. In the initial state, there is less accumulated water in the water collecting cavity 7, and the pressure exerted by the accumulated water on the floating valve core 4 is relatively small. Then, F > N + G, and the floating valve core 4 is in the cutoff position of sealing the second through hole 6, as Figure 1As shown. When the accumulated water in the water collecting chamber 7 slowly accumulates, the pressure N exerted by the accumulated water on the floating valve core 4 gradually increases. The floating valve core 4 will experience F = N + G, and it will be in force balance and remain unchanged. As the accumulated water in the water collecting chamber 7 continues to increase and N continues to become larger, the force on the floating valve core 4 will become F < N + G, then the floating valve core 4 will slowly descend, as Figure 2 shown. When the amount of accumulated water in the water collecting chamber 7 can cause the floating valve core 4 to descend to the communication position, the accumulated water in the water collecting chamber 7 will be discharged outside the motor through the first through hole 5, thereby achieving the purpose of drainage, as Figure 3 shown. The number of the first through holes 5 is multiple, and the first through holes 5 are arranged at intervals along the circumferential direction of the first housing 1. The multiple first through holes 5 can improve the drainage efficiency.

[0035] Specifically, the first housing 1 and the second housing 2 are threadedly connected, making the connection between the first housing 1 and the second housing 2 simple and firm.

[0036] In this embodiment, a seal 8 is provided at the mating position of the first housing 1 and the second housing 2. This can not only prevent water leakage at the connection of the two, but also prevent external water from entering through the connection of the two.

[0037] Figures 8 to 10The working process of the exhaust and drainage valve according to the second embodiment of the present application is shown. Its working process is the same as that of the exhaust and drainage valve in the first embodiment, and will not be elaborated here. Compared with the first embodiment, the difference in the second embodiment is only that a water flow channel 9 extending along its height direction is constructed inside the side wall of the first housing 1. At the same time, a first water passing hole 10 and a second water passing hole 11 are also constructed on the side wall of the first housing 1. The second water passing hole 11 is above the first water passing hole 10. One end of the first water passing hole 10 communicates with the accommodation cavity 3, and the other end communicates with the water flow channel 9. One end of the second water passing hole 11 communicates with the water flow channel 9, and the other end communicates with the outside of the first housing 1. Such a design makes a communicating vessel structure formed between the accommodation cavity 3 and the water flow channel 9, and the water accumulation level will be kept unified. This structure can discharge the accumulated water and better prevent external water vapor from entering the motor. Because when the accumulated water in the accommodation cavity 3 overflows the first water passing hole 10, the communication between the accommodation cavity 3 and the outside can be isolated, so external water vapor cannot enter the motor. Even if the outside is under high pressure, only the accumulated water in the accommodation cavity 3 will be squeezed upward due to the internal and external pressure difference, making the sealing part 41 of the floating valve core 4 fit more closely to the second through hole 6, and the sealing effect will be better. When the air pressure inside the motor reaches a certain level, the high-temperature and high-pressure gas will impact the floating valve core 4, making the floating valve core 4 fit to the bottom of the accommodation cavity 3. Then, the high-temperature and high-pressure gas will squeeze out the accumulated water from the first water passing hole 10, the water flow channel 9 and the second water passing hole 11 in sequence. When the water level of the accumulated water in the accommodation cavity 3 is lower than the first water passing hole 10, the high-temperature and high-pressure gas will automatically discharge through the first water passing hole 10, the water flow channel 9 and the second water passing hole 11 in sequence, as Figure 10 shown.

[0038] According to an embodiment of the present invention, there is also provided a motor, including the above-mentioned exhaust and drainage valve. The motor has a housing 12, and a threaded hole penetrating it is constructed on the housing 12. An external thread is provided on the outer surface of the second housing 2. The exhaust and drainage valve is threadedly connected to the housing 12 through the second housing 2, and the exhaust and drainage valve is at the bottommost part of the housing 12. Of course, the exhaust and drainage valve can also be detachably connected to the housing 12 by interference fit or other means.

[0039] According to an embodiment of the present invention, there is also provided a new energy vehicle, including the above-mentioned motor.

[0040] It is easy for those skilled in the art to understand that, on the premise of no conflict, the above-mentioned advantageous ways can be freely combined and superimposed.

[0041] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention. The above is only the preferred implementation manner of the present invention. It should be noted that for those of ordinary skill in the art in this technical field, without departing from the technical principle of the present invention, several improvements and modifications can still be made, and these improvements and modifications should also be regarded as within the protection scope of the present invention.

Claims

1. An exhaust and drain valve, characterized in that, It includes a first housing (1) and a second housing (2) that are snap-fitted together. An accommodation cavity (3) is formed between the first housing (1) and the second housing (2) after snap-fitting. A floating valve core (4) is arranged in the accommodation cavity (3). The first housing (1) has a first through-hole (5) that communicates with its external environment. The second housing (2) has a second through-hole (6) that communicates with a target space. The floating valve core (4) has a cut-off position for sealing the second through-hole (6) and a communication position for communicating the first through-hole (5) with the second through-hole (6). The floating valve core (4) also has a first end face close to the first housing (1) and a second end face far from the first housing (1). The floating valve core (4) realizes the switching between the cut-off position and the communication position depending on the buoyancy of the first end face, the pressure of the second end face, and the magnitude of its own gravity. The first housing (1) also has a side wall. A water flow channel (9) extending along its height direction is constructed inside the side wall. A first water through-hole (10) and a second water through-hole (11) are constructed on the side wall. The second water through-hole (11) is above the first water through-hole (10). One end of the first water through-hole (10) communicates with the accommodation cavity (3), and the other end communicates with the water flow channel (9). One end of the second water through-hole (11) communicates with the water flow channel (9), and the other end communicates with the outside of the first housing (1).

2. The exhaust and drainage valve according to claim 1, characterized in that The cross-sectional area of the second through-hole (6) gradually increases from top to bottom. The floating valve core (4) has a blocking portion (41), and the blocking portion (41) matches the second through-hole (6).

3. The exhaust and drain valve according to claim 2, wherein The floating valve core (4) also has a weight-increasing portion (42) connected to the blocking portion (41), and the weight-increasing portion (42) is below the blocking portion (41).

4. The exhaust and drainage valve according to claim 1, characterized in that, The second housing (2) also has a water collecting cavity (7). Both ends of the water collecting cavity (7) have openings. The bottom wall of the water collecting cavity (7) communicates with the second through-hole (6), and the other end communicates with the target space.

5. The exhaust and drain valve according to any one of claims 1 to 4, characterized in that, The first housing (1) and the second housing (2) are threadedly connected.

6. The exhaust and drainage valve according to any one of claims 1 to 4, characterized in that, A sealing member (8) is arranged at the mating position of the first housing (1) and the second housing (2).

7. A motor, characterized in that, It includes the exhaust and drainage valve according to any one of claims 1 to 6.

8. The motor according to claim 7, characterized in that, The motor has a housing (12). The exhaust and drainage valve is detachably connected to the housing (12) through the second housing (2), and the exhaust and drainage valve is at the bottommost part of the housing (12).

9. A new energy vehicle, characterized in that, It includes the motor according to any one of claims 7 or 8.

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