Integrated drive motor with overheat protection function

Abstract

The application discloses an integrated drive motor with overheating protection function and relates to the technical field of motors.The motor comprises a motor body, an output shaft, a sleeve installed in the motor body, the output shaft being rotatably installed on the motor body and penetrating through the sleeve, a rotor installed on the output shaft, a stator installed in the sleeve, a control box and a fan cover installed on the motor body, a fan installed on one end of the output shaft penetrating through the motor body, and the two ends of the sleeve are in sealing connection with the motor body, cooling liquid is arranged between the sleeve and the motor body, two pad feet are symmetrically installed on the motor body, a circulating tank is arranged in the pad feet, and the circulating tank enables the cooling liquid to flow circularly between the sleeve and the motor body.Through the arrangement of the sleeve, the cooling liquid and the circulating tank, liquid cooling of the motor is realized, and the overheating phenomenon of the motor during operation is prevented.

Description

Technical Field

[0001] This invention relates to the field of motor technology, specifically to an integrated drive motor with overheat protection. Background Technology

[0002] An integrated drive motor is a device that highly integrates the motor body, controller, encoder, and other core functional units into one unit. Also known as an integrated motor or drive-integrated motor, it is widely used in industrial automation, robotics, and electric vehicles. However, heat dissipation has always been a significant factor limiting its performance and lifespan. Traditional air-cooling technology can no longer meet development needs; therefore, improving air-cooling technology has become an important direction for solving this problem. Summary of the Invention

[0003] The purpose of this invention is to provide an integrated drive motor with overheat protection function to solve the problems raised in the prior art.

[0004] To achieve the above objectives, the present invention provides the following technical solution: an integrated drive motor with overheat protection function, comprising a body and an output shaft. A control box is disposed on the body, the output shaft passes through the body and is rotatably connected to the body, and a rotor is disposed on the output shaft. A fan cover is disposed at one end of the body. A sleeve is sealed inside the body, and a stator is disposed inside the sleeve. The output shaft passes through the sleeve. A cooling plate is disposed inside the body. Pads are symmetrically installed below the body, and the internal space of the pads is in communication with the internal space of the body. A cooling medium is disposed between the sleeve and the body, and a circulation tank is disposed inside the pads, allowing the cooling medium to flow within the body. Through the arrangement of the sleeve, coolant, and circulation tank, liquid cooling of the motor is achieved, preventing overheating during operation.

[0005] A heat sink is mounted on the inner side of the fan shroud via a ceramic pad. The heat sink serves as the heating end in the Peltier effect, while the cooling plate serves as the cooling end. Both the cooling plate and the heat sink are electrically connected to the control box. When the cooling plate cools the cooling medium within the machine body, the rotation of the fan dissipates heat from the heat sink.

[0006] The sleeve has several annular grooves axially arranged on it. A sealing ring with a "C" shaped cross-section is arranged on the outside of the annular grooves on the sleeve. An annular hot plate is arranged in the annular groove. Several thermoelectric power generation elements are arranged circumferentially on the hot plate. The thermoelectric power generation elements are connected in series and electrically connected to the control box. One end of the thermoelectric power generation element is in contact with the sealing ring.

[0007] The thermoelectric element consists of a P-type semiconductor, an N-type semiconductor, and three metal plates. A metal plate is mounted on one end of each of the P-type and N-type semiconductors. The other ends of the P-type and N-type semiconductors are connected to a common metal plate. This common metal plate is connected to a hot plate. The individual metal plates connected to the other ends of the P-type and N-type semiconductors are in contact with a sealing ring made of ceramic. The thermoelectric element generates electricity using the Seebeck effect. The sealing ring is the cold end, and the hot plate (not shown in the figure) is the hot end. The thermoelectric element generates electricity between the hot plate and the sealing ring. The control system in the control box detects the current generated by the thermoelectric element. A larger current results in a hotter motor, and vice versa. By detecting the current, the power supply to the motor is controlled. When the motor temperature is too high, the power is cut off, achieving overheat protection.

[0008] The cooling plate is provided with several flow-through holes. These flow-through holes increase the heat exchange area between the cooling medium and the cooling plate, thereby improving cooling efficiency.

[0009] The machine body has two symmetrically arranged arc-shaped shells inside. Each shell has a vertical plate at both ends. The shells are located outside the sleeve. The two shells cooperate to divide the space between the machine body and the sleeve into two interconnected spaces. The two interconnected spaces are divided into an outer cavity and an inner cavity. The inner cavity is outside the sleeve. The vertical plates at both ends and the bottom of the shells are connected to the machine body. The cooling plate is installed between the bottom vertical plates of the two shells.

[0010] The cooling medium circulates in the outer and inner cavities;

[0011] The foot pads are equipped with inlet and outlet slots, and the body has corresponding through slots at the positions of the inlet and outlet slots. The lower vertical plate of each casing is located between two through slots, which are located in the outer cavity and the inner cavity, respectively. When the circulation box is working, the inlet slot draws the cooling medium from the outer cavity, and then the cooling medium is introduced into the inner cavity. This allows the cooling medium to pass through the cooling plate when entering the inner cavity. Through the casing design, the cooling medium can circulate within the body.

[0012] The cooling medium is a coolant or a mixture of coolant and gas. When the cooling medium is a mixture of coolant and gas, the gas is located in the outer cavity, the coolant is in the inner cavity, and the sleeve is immersed in the coolant. When the cooling medium is a mixture of gas and coolant, under the conveying of the circulation tank, the gas is forced into the coolant and forms bubbles in the coolant. As the bubbles travel through the coolant, they cause the coolant to churn, which helps the coolant dissipate heat to the outer cavity. When coolant is present in the outer cavity, it is returned to the inner cavity under the conveying of the circulation tank. When the cooling medium is coolant, the coolant fills both the outer and inner cavities. Under the conveying of the circulation tank, the coolant in the outer and inner cavities circulates, achieving cooling of the sleeve.

[0013] The circulation tank has a recessed curved surface on its upper side that connects to the curved surface of the pad. The circulation tank separates the channel between the inlet and outlet channels. Baffles and rotating plates are installed on both sides of the circulation tank. The circulation tank has several through holes. The baffles have inlet holes with a diameter smaller than the through holes. The rotating plates have outlet holes with a diameter larger than the through holes. A middle plate is slidably installed in the circulation tank. The middle plate has two concentric one-way holes with different diameters corresponding to the through holes. Valve plates are rotatably installed in the larger diameter one-way hole, the through hole on the circulation tank near the baffle, and the outlet hole. The valve plate on the rotating plate has a larger diameter than the valve plate on the circulation tank and the middle plate.

[0014] The valve plate diameter on the rotating plate is larger than the diameter of the through hole, the valve plate diameter on the middle plate is larger than the diameter of the small-diameter one-way hole, and the valve plate diameter on the circulation tank is larger than the diameter of the inflow hole.

[0015] Electromagnetic springs are installed on both sides of the middle plate, with each end of the spring connected to the middle plate and the circulation tank, respectively. The two ends of the springs are also electrically connected to the control box. The control system in the control box alternately supplies power to the electromagnetic springs on both sides of the middle plate. The control system can use an external power source or electricity generated by a thermoelectric generator to power the electromagnetic springs. When it is necessary to extract the cooling medium from the outer cavity, the electromagnetic springs pull the middle plate towards the baffle. At this time, the electromagnetic spring between the middle plate and the baffle is energized and contracts under the influence of the magnetic field, pulling the middle plate towards the baffle. During this process, the cooling medium between the middle plate and the baffle is compressed. Under the compression of the cooling medium, the valve plate on the circulation tank cannot open, while the valve plate on the middle plate is pushed open, allowing the cooling medium to pass through the middle plate. When the electromagnetic spring can no longer compress, the middle plate stops moving, and the valve plate re-closes the one-way hole, realizing the transfer of the cooling medium in the circulation tank. Then, the control system supplies power to the electromagnetic spring between the middle plate and the rotating plate, and... When the electromagnetic spring between the middle plate and the baffle is de-energized, the energized electromagnetic spring pulls the middle plate towards the rotating plate. During this movement, the previously compressed electromagnetic spring releases its elastic potential energy and pushes the middle plate towards the rotating plate. As the energized electromagnetic spring continues to contract, the middle plate moves to the vicinity of the rotating plate. When the middle plate moves towards the rotating plate, the cooling medium between the middle plate and the rotating plate is compressed. The valve plate on the middle plate is compressed by the cooling medium and cannot open. The cooling medium will push open the valve plate on the rotating plate and enter the inner cavity, while a negative pressure is generated between the middle plate and the baffle. As the negative pressure increases, the external cooling medium passes through the valve plate on the circulation box and enters the circulation box. By alternately energizing the electromagnetic springs on both sides of the middle plate, the middle plate makes a reciprocating linear movement in the circulation box. Utilizing the reciprocating movement of the middle plate and the opening and closing of the valve plate, the cooling medium is continuously transferred from the outer cavity to the inner cavity.

[0016] A first filter plate is installed in the foot pad between the circulation tank and the inlet trough, and a second filter plate is installed on one side of the rotating plate in the foot pad. The second filter plate is located below the outlet trough, and its height is lower than that of the valve plate. The first and second filter plates are used to filter impurities present in the cooling medium.

[0017] The first filter plate includes slide rails symmetrically installed inside the foot pad. A bottom frame is slidably installed between the two slide rails. The bottom frame has an inwardly recessed groove for engaging the upper frame. Two retaining plates are positioned upwards at both ends of the groove. Two semi-circular grooves are symmetrically arranged between the two retaining plates in the groove. The upper frame has a retaining groove for matching the retaining plates and two semi-circular grooves. A filter cloth is connected to one end of the lower part of the upper frame. One end of the bottom frame's groove is connected to the other end of the filter cloth. A circular sealing strip is positioned on the short side of the filter cloth, and the sealing strip matches the size of the semi-circular groove. The sealing strip prevents the short side of the filter cloth from detaching from the upper and bottom frames. Both the upper and bottom frames are connected to the long side of the filter cloth. When the first filter plate is used in the foot pad, the upper and bottom frames cooperate to clamp the filter cloth. The sealing strip is located in the circular groove formed by the two semi-circular grooves. The bottom frame is then fully pushed into the slide rail, and bolts are used to lock the position of the bottom frame, preventing it from sliding out of the foot pad. When the filter cloth needs cleaning, pull the bottom frame out of the pad, remove the top frame from the insert, and pull one end of the filter cloth through the top frame to flip the filter cloth 180 degrees so that the side with impurities is facing down, making it easier for external personnel to clean the filter cloth. After cleaning, clamp the filter cloth back between the top and bottom frames and push the pad back in.

[0018] Compared with the prior art, the beneficial effects of the present invention are: the thermoelectric element utilizes the heat generated by the operation of the motor and the Seebeck effect to generate heat electricity; the control system in the control box detects the magnitude of the current generated by the thermoelectric element; the larger the current, the hotter the motor, and vice versa; by detecting the current, the power supply and disconnection of the motor can be controlled; when the motor temperature is too high, the power to the motor is cut off to achieve the purpose of overheat protection.

[0019] By using a sleeve and housing, the internal structure of the motor is divided into an outer cavity and an inner cavity. The cooling medium fills the outer and inner cavities, immersing the sleeve, rotor, and stator in the coolant, thus achieving liquid cooling of the rotor and stator. Furthermore, when the cooling medium is a mixture of gas and coolant, the gas is forced into the coolant by the circulation tank, forming bubbles in the coolant. As these bubbles travel through the coolant, they cause it to churn, which helps dissipate heat from the motor. Attached Figure Description

[0020] Figure 1 This is a perspective view of the overall structure of the present invention;

[0021] Figure 2 This is a half-sectional perspective view of the present invention;

[0022] Figure 3 This is a three-dimensional view of the internal structure of the present invention;

[0023] Figure 4 This is an exploded view of the heat sink and fan shroud of the present invention;

[0024] Figure 5 This is an exploded view of the interior of the foot pad of the present invention;

[0025] Figure 6 This is an exploded view of the interior of the circulation tank of the present invention;

[0026] Figure 7 This is an exploded view of the first filter plate of the present invention;

[0027] Figure 8 For the present invention Figure 7 A magnified view of a portion of region A in the middle.

[0028] In the diagram: 1. Main body; 2. Control box; 3. Foot pad; 4. Fan cover; 5. Output shaft; 6. Rotor; 7. Stator; 8. Sleeve; 9. Housing; 10. Sealing ring; 11. Cooling plate; 12. Heat sink; 13. Inlet groove; 14. First filter plate; 15. Circulation box; 16. Second filter plate; 17. Baffle; 18. Valve plate; 19. Electromagnetic spring; 20. Middle plate; 21. Rotating plate; 22. Slide rail; 23. Bottom frame; 24. Top frame; 25. Filter cloth; 26. Clamping plate. Detailed Implementation

[0029] Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0030] Example: Figure 1 - Figure 8 As shown, the present invention provides a technical solution: an integrated drive motor with overheat protection function, including a body 1 and an output shaft 5. A control box 2 is provided on the body 1. The output shaft 5 passes through the body 1 and is rotatably connected to the body 1. A rotor 6 is provided on the output shaft 5. A fan cover 4 is provided at one end of the body 1. A sleeve 8 is sealed inside the body 1. A cooling medium is provided between the sleeve 8 and the body 1. A stator 7 is provided inside the sleeve 8. The output shaft 5 passes through the sleeve 8. Two arc-shaped housings 9 are symmetrically arranged inside the body 1. Vertical plates are provided at both ends of the housings 9. The housings 9 are located outside the sleeve 8. The vertical plates at both ends and the bottom of the housings 9 are connected to the body 1. The two housings 9 cooperate with each other to divide the space between the body 1 and the sleeve 8 into two interconnected spaces. The two interconnected spaces are divided into an outer cavity and an inner cavity. The inner cavity is outside the sleeve 8. The cooling medium is in the outer cavity and the inner cavity.

[0031] The body 1 is equipped with a cooling plate 11, which has several flow holes. The cooling plate 11 is installed between the lower vertical plates of the two shells 9.

[0032] The cooling medium is a coolant or a mixture of coolant and gas; when the cooling medium is a mixture of coolant and gas, the gas is located in the outer cavity, the coolant is in the inner cavity, and the sleeve 8 is immersed in the coolant.

[0033] A heat sink 12 is mounted on the inner side of the fan shroud 4 via a ceramic pad. The heat sink 12 is the heating end of the Peltier effect, and the cooling plate 11 is the cooling end of the Peltier effect. Both the cooling plate 11 and the heat sink 12 are electrically connected to the control box 2. When the cooling plate 11 cools the cooling medium in the machine body 1, the rotation of the fan is used to dissipate heat from the heat sink 12.

[0034] The sleeve 8 has several annular grooves axially arranged. A sealing ring 10 with a "C" shaped cross section is arranged on the outside of the annular grooves on the sleeve 8. An annular hot plate is arranged in the annular groove. Several thermoelectric power generation elements are arranged circumferentially on the hot plate. The thermoelectric power generation elements are connected in series and electrically connected to the control box 2. One end of the thermoelectric power generation element is in contact with the sealing ring 10.

[0035] The thermoelectric element consists of a P-type semiconductor, an N-type semiconductor, and three metal plates. A metal plate is mounted on one end of each of the P-type and N-type semiconductors. The other ends of the P-type and N-type semiconductors are connected to a common metal plate. This common metal plate is connected to a hot plate. The individual metal plates connected to the other ends of the P-type and N-type semiconductors are in contact with a sealing ring 10, which is made of ceramic. The thermoelectric element utilizes the Seebeck effect to generate electricity. The sealing ring 10 is the cold end, and the hot plate is the hot end.

[0036] Symmetrical feet 3 are installed on the lower part of the body 1. Each foot 3 has an inlet groove 13 and an outlet groove. Corresponding to the inlet groove 13 and outlet groove, a through groove is provided on the body 1. The lower vertical plate of each casing 9 is located between two through grooves, which are respectively located in the outer cavity and the inner cavity. The internal space of the feet 3 is connected to the internal space of the body 1. A circulation box 15 is installed inside the feet 3, allowing the cooling medium to flow between the outer and inner cavities.

[0037] A recessed curved surface is provided on the upper side of the circulation box 15 and is connected to the curved surface of the pad 3. The circulation box 15 separates the channel between the inlet trough 13 and the outlet trough. Baffles 17 and rotating plates 21 are installed on both sides of the circulation box 15. Several through holes are provided on the circulation box 15. Inlet holes with a diameter smaller than the through holes are provided on the baffles 17. Outlet holes with a diameter larger than the through holes are provided on the rotating plates 21. A middle plate 20 is slidably installed in the circulation box 15. Two concentric one-way holes with different diameters are provided on the middle plate 20 at the position corresponding to the through holes. Valve plates 18 are rotatably installed in the one-way hole with a larger diameter, in the through hole on the circulation box 15 near the baffles 17, and in the outlet hole. The diameter of the valve plate 18 on the rotating plate 21 is larger than the diameter of the valve plate 18 on the circulation box 15 and the middle plate 20.

[0038] The diameter of the valve plate 18 on the rotating plate 21 is larger than the diameter of the through hole, the diameter of the valve plate 18 on the middle plate 20 is larger than the diameter of the small-diameter one-way hole, and the diameter of the valve plate 18 on the circulation box 15 is larger than the diameter of the inflow hole.

[0039] Electromagnetic springs 19 are installed on both sides of the middle plate 20. The two ends of the electromagnetic springs 19 are connected to the middle plate 20 and the circulation box 15 respectively, and the two ends of the electromagnetic springs 19 are electrically connected to the control box 2.

[0040] A first filter plate 14 is installed in the foot 3 between the circulation tank 15 and the inlet trough 13. A second filter plate 16 is installed on one side of the rotating plate 21 in the foot 3. The second filter plate 16 is located below the outlet trough, and its height is lower than that of the valve plate 18. The first filter plate 14 and the second filter plate 16 are used to filter impurities present in the cooling medium.

[0041] The first filter plate 14 includes slide rails 22 symmetrically installed inside the pads 3. A bottom frame 23 is slidably installed between the two slide rails 22. The bottom frame 23 is provided with an inwardly recessed groove for engaging the upper frame 24. The two ends of the groove are provided with retaining plates 26. Two semi-circular grooves are symmetrically arranged between the two retaining plates 26 in the groove. The upper frame 24 is provided with a retaining groove for matching the retaining plates 26 and two semi-circular grooves. A filter cloth 25 is connected to one end of the lower part of the upper frame 24. One end of the groove of the bottom frame 23 is connected to the other end of the filter cloth 25. Both the upper frame 24 and the bottom frame 23 are connected to the long side of the filter cloth 25. A sealing strip with a circular cross-section is provided at the short side of the filter cloth 25. The size of the sealing strip matches the semi-circular groove. The sealing strip prevents the short side of the filter cloth 25 from detaching from the upper frame 24 and the bottom frame 23.

[0042] When the cooling medium is a mixture of gas and coolant, the gas is forced into the coolant by the circulation tank 15, forming bubbles in the coolant. As the bubbles travel through the coolant, they cause the coolant to churn, which helps the coolant dissipate heat into the outer cavity. When coolant is present in the outer cavity, it is returned to the inner cavity by the circulation tank 15. When the cooling medium is coolant, the coolant fills both the outer and inner cavities. By circulating the coolant in the circulation tank 15, the coolant in the outer and inner cavities circulates, achieving cooling of the sleeve 8.

[0043] When it is necessary to extract the cooling medium from the outer cavity, the electromagnetic spring 19 pulls the middle plate 20 towards the baffle 17. At this time, the electromagnetic spring 19 between the middle plate 20 and the baffle 17 is energized and contracts under the action of the magnetic field, pulling the middle plate 20 towards the baffle 17. During this process, the cooling medium between the middle plate 20 and the baffle 17 is compressed. Under the compression of the cooling medium, the valve plate 18 on the circulation tank 15 cannot open, while the valve plate 18 on the middle plate 20 is pushed open, and the cooling medium passes through the middle plate 20. When the electromagnetic spring 19 can no longer compress, the middle plate 20 stops moving, and the valve plate 18 re-closes the one-way hole, realizing the position transfer of the cooling medium in the circulation tank 15. Then, the control system supplies power to the electromagnetic spring 19 between the middle plate 20 and the rotating plate 21, and moves the middle plate... When the electromagnetic spring 19 between plate 20 and baffle 17 is de-energized, the energized electromagnetic spring 19 pulls plate 20 towards rotating plate 21. During the movement, the previously compressed electromagnetic spring 19 releases its elastic potential energy and pushes plate 20 towards rotating plate 21. As the energized electromagnetic spring 19 continues to contract, plate 20 moves to the vicinity of rotating plate 21. When plate 20 moves towards rotating plate 21, the cooling medium between plate 20 and rotating plate 21 is squeezed. Valve plate 18 on plate 20 is squeezed by the cooling medium and cannot be opened. The cooling medium will push open valve plate 18 on rotating plate 21 and enter the inner cavity. A negative pressure is generated between plate 20 and baffle 17. As the negative pressure increases, the external cooling medium passes through valve plate 18 on circulation box 15 and enters circulation box 15. By alternately supplying power to the electromagnetic springs 19 on both sides of the middle plate 20, the middle plate 20 moves in a reciprocating linear motion in the circulation box 15. The reciprocating movement of the middle plate 20 and the opening and closing of the valve plate 18 are used to continuously transfer the cooling medium from the outer cavity to the inner cavity.

[0044] The working principle of this invention is as follows: During motor operation, the fan provides air cooling to the heat sink 12, and the fins dissipate heat from the body 1. A thermoelectric generator generates electricity between the heat sink and the sealing ring 10. The control system in the control box 2 detects the current generated by the thermoelectric generator; a higher current indicates a hotter motor, and vice versa. By detecting the current, the power supply to the motor is controlled. When the motor temperature is too high, the power is cut off, achieving overheat protection.

[0045] During motor operation, the control system in control box 2 alternately supplies power to the electromagnetic springs 19 on both sides of the middle plate 20. The control system can use an external power source to power the electromagnetic springs 19, or it can use electricity generated by a thermoelectric generator to power the electromagnetic springs 19. The alternating power supply of the control system to the electromagnetic springs 19 on both sides of the middle plate 20 causes the middle plate 20 to move reciprocally in a linear motion within the circulation box 15. By using the one-way opening and closing of the valve plate 18, the cooling medium in the outer cavity is extracted and then transported to the inner cavity. The cooling medium in the inner cavity then flows back to the outer cavity from above the casing 9.

[0046] When the cooling medium passes through the cooling plate 11, it exchanges heat with the cooling plate 11 to achieve cooling. When it flows in the inner cavity, it contacts the outer surface of the sleeve 8 to achieve heat exchange with the sleeve 8, thereby achieving heat dissipation for the rotor 6 and stator 7, and thus achieving heat dissipation for the motor.

[0047] When the first filter plate 14 is used in the pad 3, the upper frame 24 and the bottom frame 23 cooperate to clamp the filter cloth 25. The sealing strip is located in the circular groove formed by two semi-circular grooves. Then, the bottom frame 23 is fully pushed into the slide rail 22, and the position of the bottom frame 23 is locked with bolts to prevent the bottom frame 23 from sliding out of the pad 3. When it is necessary to clean the filter cloth 25, the bottom frame 23 is pulled out of the pad 3, the upper frame 24 is taken out of the embedded groove, and one end of the filter cloth 25 is pulled by the upper frame 24 to make the filter cloth 25 rotate 180 degrees so that the side of the filter cloth 25 with impurities is facing down, making it convenient for external personnel to clean the impurities from the filter cloth 25. After cleaning, the filter cloth 25 is clamped between the upper frame 24 and the bottom frame 23 again, and then pushed back into the pad 3.

[0048] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An integrated drive motor with overheat protection function, comprising a body (1) and an output shaft (5), wherein a control box (2) is provided on the body (1), the output shaft (5) passes through the body (1) and is rotatably connected to the body (1), a rotor (6) is provided on the output shaft (5), and a fan cover (4) is provided at one end of the body (1), characterized in that: The machine body (1) is sealed with a sleeve (8), and a stator (7) is installed inside the sleeve (8). The output shaft (5) passes through the sleeve (8). A cooling plate (11) is installed inside the machine body (1). Foot pads (3) are symmetrically installed below the machine body (1). The internal space of the foot pads (3) is connected to the internal space of the machine body (1). A cooling medium is provided between the sleeve (8) and the machine body (1). A circulation box (15) is provided inside the foot pads (3). The circulation box (15) allows the cooling medium to flow in the machine body (1). The body (1) has two symmetrically arranged arc-shaped shells (9) inside. Both ends of the shells (9) are provided with vertical plates. The shells (9) are located outside the sleeve (8). The two shells (9) cooperate with each other to divide the space between the body (1) and the sleeve (8) into two interconnected spaces. The two interconnected spaces are divided into an outer cavity and an inner cavity. The inner cavity is outside the sleeve (8). The vertical plates at both ends and the bottom of the shells (9) are connected to the body (1). The cooling plate (11) is installed between the lower vertical plates of the two shells (9). The cooling medium circulates in the outer and inner cavities; The pad (3) is provided with an inlet groove (13) and an outlet groove. The body (1) is provided with a through groove corresponding to the inlet groove (13) and the outlet groove. The lower vertical plate of each shell (9) is located between two through grooves, which are located in the outer cavity and the inner cavity, respectively.

2. The integrated drive motor with overheat protection function according to claim 1, characterized in that: The fan cover (4) has a heat sink (12) installed on the inside through a ceramic pad. The heat sink (12) is the heating end of the Peltier effect, and the cooling plate (11) is the cooling end of the Peltier effect. Both the cooling plate (11) and the heat sink (12) are electrically connected to the control box (2).

3. The integrated drive motor with overheat protection function according to claim 1, characterized in that: The sleeve (8) is provided with several annular grooves in the axial direction. A sealing ring (10) with a "C" shaped cross section is provided on the outside of the annular groove. An annular hot plate is provided in the annular groove. Several thermoelectric power generation elements are provided circumferentially on the hot plate. The several thermoelectric power generation elements are connected in series and electrically connected to the control box (2). One end of the thermoelectric power generation element is in contact with the sealing ring (10).

4. The integrated drive motor with overheat protection function according to claim 3, characterized in that: The thermoelectric element consists of a P-type semiconductor, an N-type semiconductor, and three metal plates. A metal plate is installed at one end of the P-type semiconductor and one end of the N-type semiconductor. The other ends of the P-type semiconductor and the N-type semiconductor are connected to a common metal plate. The metal plate connected to the other ends of the P-type semiconductor and the N-type semiconductor is connected to a hot plate. The metal plates connected to the other ends of the P-type semiconductor and the N-type semiconductor are in contact with a sealing ring (10). The sealing ring (10) is made of ceramic.

5. An integrated drive motor with overheat protection function according to claim 1, characterized in that: The cooling plate (11) is provided with several flow holes.

6. The integrated drive motor with overheat protection function according to claim 1, characterized in that: The cooling medium is a coolant or a mixture of coolant and gas; when the cooling medium is a mixture of coolant and gas, the gas is located in the outer cavity and the coolant is in the inner cavity, and the sleeve (8) is immersed in the coolant.

7. An integrated drive motor with overheat protection function according to claim 1, characterized in that: The circulation box (15) has a recessed curved surface on its upper side, which is connected to the curved surface of the pad (3). The circulation box (15) separates the channel between the inlet groove (13) and the outlet groove. The circulation box (15) has baffles (17) and rotating plates (21) installed on both sides. The circulation box (15) has several through holes. The baffles (17) have inlet holes with a diameter smaller than the through holes. The rotating plates (21) have outlet holes with a diameter larger than the through holes. The circulation box (15) has a middle plate (20) slidably installed in the circulation box (15). The middle plate (20) has two concentric one-way holes with different diameters at the position corresponding to the through holes. Valve plates (18) are rotatably installed in the one-way hole with a larger diameter, the through hole on the circulation box (15) near the baffles (17), and the outlet hole. The valve plate (18) on the rotating plate (21) has a diameter larger than the valve plate (18) on the circulation box (15) and the middle plate (20). The diameter of the valve plate (18) on the rotating plate (21) is larger than the diameter of the through hole, the diameter of the valve plate (18) on the middle plate (20) is larger than the diameter of the small-diameter one-way hole, and the diameter of the valve plate (18) on the circulation box (15) is larger than the diameter of the inflow hole. Electromagnetic springs (19) are installed on both sides of the middle plate (20). The two ends of the electromagnetic springs (19) are connected to the middle plate (20) and the circulation box (15) respectively. The two ends of the electromagnetic springs (19) are electrically connected to the control box (2).

8. An integrated drive motor with overheat protection function according to claim 1, characterized in that: A first filter plate (14) is provided between the circulation tank (15) and the inlet trough (13) in the foot (3), and a second filter plate (16) is installed on one side of the rotating plate (21) in the foot (3). The second filter plate (16) is located below the outlet trough, and the height of the second filter plate (16) is lower than the height of the valve plate (18).

9. An integrated drive motor with overheat protection function according to claim 8, characterized in that: The first filter plate (14) includes slide rails (22) symmetrically installed inside the pad (3). A bottom frame (23) is slidably installed between the two slide rails (22). The bottom frame (23) is provided with an inset groove that engages with the upper frame (24). The two ends of the inset groove are provided with a retaining plate (26). Two semi-circular grooves are symmetrically arranged between the two retaining plates (26) in the inset groove. The upper frame (24) is provided with a retaining groove that matches the retaining plate (26) and two semi-circular grooves. A filter cloth (25) is connected to one end of the lower part of the upper frame (24). One end of the inset groove of the bottom frame (23) is connected to the other end of the filter cloth (25). A sealing strip with a circular cross-section is provided on the short side of the filter cloth (25). The size of the sealing strip matches the size of the semi-circular groove.

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