Motor with forced air cooling heat dissipation device and composite controller

Abstract

The invention relates to a motor with a forced air cooling heat dissipation device and a composite controller, and belongs to the technical field of motors. The motor comprises a motor body, a controller and a forced air cooling heat dissipation device, the controller is installed at the tail of the motor body, the controller and the motor body are arranged in a spaced mode, and the forced air cooling heat dissipation device is installed between the controller and the motor body. The forced air cooling heat dissipation device comprises a heat dissipation impeller and a driver driving the heat dissipation impeller to rotate, the heat dissipation impeller is coaxial with an output shaft of the motor body, and the heat dissipation impeller rotates to generate mixed flow air pressure difference. The LED lamp has the advantages of being compact in structure and good in heat dissipation effect.

Description

Technical Field

[0001] This application relates to the field of electric motors, and in particular to an electric motor with a forced air cooling device and a composite controller. Background Technology

[0002] An electric motor is an electromagnetic device that converts or transmits electrical energy based on the law of electromagnetic induction; while a motor controller is an integrated circuit that actively controls the motor to work according to a set direction, speed, angle, and response time.

[0003] In traditional motor designs, the controller is typically mounted directly above or near the motor body. Due to heat conduction and radiation, both the motor body and the controller act as heat sources, causing their temperatures to rise and impacting their safe and reliable operation. While mounting the controller separately nearby allows for independent heat dissipation, resulting in a less compact layout, this approach offers advantages in terms of structural compactness and ease of installation. However, it suffers from significant shortcomings in thermal management. During operation, both the stator and rotor of the motor generate substantial heat due to resistance losses from current flow, core losses caused by magnetic field changes, and mechanical friction. Simultaneously, the controller, as a core component of the motor drive system, also generates heat during current and voltage regulation and control algorithm execution. This combined heat accumulation leads to even faster temperature increases, rendering passive cooling insufficient and necessitating forced air cooling with a fan.

[0004] In existing methods, a fan is usually installed at the rear of the motor to provide air cooling for the motor body after power is applied. However, this is not very effective for cooling the controller at the front of the motor. Installing separate cooling devices for the motor and controller would result in a bulky overall structure, increased costs, and reduced reliability, which would defeat the original intention of integrating the controller with the motor to achieve a compact structure and convenient installation. Summary of the Invention

[0005] In order to integrate the controller into the motor while ensuring structural compactness and improving heat dissipation, this application provides a motor with a forced air cooling device and an integrated controller.

[0006] The motor with a forced air cooling device and a composite controller provided in this application adopts the following technical solution:

[0007] A motor with a forced air cooling device and a composite controller includes a motor body, a controller, and a forced air cooling device. The controller is installed at the tail of the motor body and is spaced apart from the motor body. The forced air cooling device is installed between the controller and the motor body. The forced air cooling device includes a cooling impeller and a driver that drives the cooling impeller to rotate. The cooling impeller is coaxial with the output shaft of the motor body. The rotation of the cooling impeller generates a mixed air pressure difference.

[0008] By adopting the above technical solution, the controller is integrated into the tail of the motor body, making the entire motor resemble a long strip. This increases the length requirement but reduces the height requirement, while maintaining the compactness of the structure. Simultaneously, a forced air cooling device is installed between the motor body and the controller, dissipating heat from both simultaneously and improving the cooling effect. Because the forced air cooling device separates the motor body and the controller, it prevents the accumulation of heat generated by the motor and controller. The installation of a single forced air cooling device has minimal impact on the compactness and overall size of the motor structure. The cooling impeller occupies very little space, only requiring the clearance between the motor body and the controller for heat dissipation. This utilizes space that was already allocated in the design. The rotating motion of the cooling impeller generates a mixed-flow air pressure difference, causing air near the motor body and controller to flow outwards, carrying away surface heat and effectively improving heat dissipation.

[0009] Optionally, the forced air cooling device further includes a guide plate. A connecting component is provided on the side of the controller facing the motor body. Multiple connecting components are disposed around the outer ring of the controller. The connecting components connect the motor body and the controller. The guide plate is located between the cooling impeller and the controller. The output shaft of the motor body is a double-ended output shaft. The cooling impeller is installed at the output end of the tail of the motor body. The connecting component passes through the guide plate and secures it. The cooling impeller includes a heat dissipation plate and protruding blades disposed on the heat dissipation plate. The protruding blades are disposed on the side of the heat dissipation plate facing the guide plate. Multiple protruding blades extend radially along the rotation direction of the heat dissipation plate. An air collecting cavity is formed between the guide plate and the controller, and a flow hole is opened in the center of the guide plate.

[0010] By adopting the above technical solution, the cooling impeller and the controller are separated by an air guide plate, and the controller and the motor body are fixed together by a connecting component. The connecting component is set on the outer ring of the controller, so that the cooling impeller and the connecting component will not interfere with each other. At the same time, the connecting component also serves to stabilize the air guide plate. The cooling impeller is composed of a heat dissipation plate and raised blades. When the cooling impeller rotates, it pushes the air between the controller and the motor body outward to achieve heat dissipation. The air guide plate has a hole in the middle, which covers the outer ring of the cooling impeller and opens in the middle, thus planning the airflow between the controller and the motor body. Air flows from the space between the controller and the air guide plate into the cooling impeller through the hole in the middle of the air guide plate, achieving heat dissipation at the end of the controller. The cooling impeller pushes the air out at one end of the motor body, which can also carry away the heat at the end of the motor body.

[0011] Optionally, the forced air cooling device further includes an air guide shroud, which is combined with the air guide plate to form an air guide component. One end of the air guide shroud is fitted onto the motor body to form an air outlet, and the other end is fitted onto the controller to form an air inlet. The air guide plate is located in the middle of the air guide shroud and divides the space inside the air guide shroud into two parts.

[0012] By adopting the above technical solution and setting up an air guide shroud, on the one hand, the space between the motor body and the controller is covered, thereby protecting the structure of the heat dissipation impeller to a certain extent. The heat dissipation impeller is not easily touched or collided when it rotates. On the other hand, by setting up an air guide shroud, an air inlet and an air outlet are formed, which further guides the airflow. The air around the outer ring of the controller first changes from axial motion to radial motion and enters the air collection chamber. Driven by the heat dissipation impeller, it changes from radial motion to axial motion and is discharged from the air outlet. During this process, the air flows over the outer peripheral surfaces of the controller and the motor body, better carrying away the heat from the surfaces of the motor body and the controller, and improving the overall heat dissipation effect.

[0013] Optionally, a junction box is provided on the outer side of the rear of the motor body, a wire-passing hole is provided on the outer ring of the air guide plate, an end wire-out hole is provided on the outer edge of the controller facing the motor body, and a bottom rubber pad hole is provided in the junction box. The controller controls the lead wire of the motor body to enter the junction box through the end wire-out hole, the wire-passing hole and the bottom rubber pad hole and finally enter the interior of the motor body. The power cord of the controller enters the junction box and exits the junction box in the same way as the lead wire of the controller.

[0014] By adopting the above technical solution, the junction box is used for external power supply to the motor, as well as for connecting the controller and the motor body. The setting of the end wire outlet hole, wire passage hole and bottom rubber pad hole ensures that the wires between the controller and the motor body will not interfere with the heat dissipation impeller. At the same time, it also organizes the motor wires, ensuring that the controller and the motor body are spaced apart and equipped with forced air cooling heat dissipation devices, while protecting the corresponding wiring.

[0015] Optionally, the controller has a controller end face heat dissipation rib on the side facing the motor body, and the controller outer wall has a controller peripheral heat dissipation rib that extends into the air inlet. The motor body has a motor peripheral heat dissipation rib on its outer wall that extends into the air outlet. The controller end face heat dissipation ribs can be in various forms, including strip, wave, dot, or different shapes, and the radial length of each controller end face heat dissipation rib can vary, but it is required that it does not obstruct the radial flow of air. The height of the controller end face heat dissipation ribs is 1mm-10mm, and the distance between the controller end face heat dissipation ribs and the air guide plate is less than or equal to 5mm.

[0016] By adopting the above technical solution, and by setting heat dissipation fins on the controller periphery, controller end face, and motor periphery, the contact area with air is increased, so that the air can better carry away heat when it flows over the motor surface and controller surface.

[0017] Optionally, the heat dissipation fins on the end face of the controller and the heat dissipation fins on the periphery of the controller are arranged alternately.

[0018] By adopting the above technical solution, the staggered arrangement allows for staggered airflow. The air between the heat dissipation fins on the periphery of the controller flows through the ends of the heat dissipation fins on the end face of the controller, indirectly increasing the contact area. This ensures that as much air as possible on the surface of the heat dissipation fins on the end face of the controller participates in the circulation, thereby improving heat dissipation efficiency.

[0019] Optionally, the air guide shroud and the air guide plate are separately configured. The air guide shroud is fixed to the motor body, and the fitting gap between the air guide shroud and the air guide plate is less than or equal to 2mm. Irregular shapes are allowed in the fitting between the air guide shroud and the air guide plate.

[0020] By adopting the above technical solution, the air guide cover and air guide plate are set separately, which facilitates the installation of the air guide plate and air guide cover. The air guide cover is fixed to the motor body, and the air guide cover can be removed separately to expose the heat dissipation impeller. It is not necessary to remove the controller and then remove the composite part formed by the air guide cover and air guide plate. This facilitates the adjustment, observation and maintenance of the heat dissipation impeller. The air guide cover is installed with the motor body, and the air guide plate cooperates with the connecting component, so that the air guide cover and air guide plate can be fitted with a gap. This facilitates the installation of the air guide cover, and the gap between the air guide cover and air guide plate is uniform, which can be kept at 2mm or less. It is not easy for the air guide cover and air guide plate to be misaligned in the circumferential direction, resulting in a larger gap in some areas.

[0021] Optionally, the outer casing of the motor body includes a housing and a tail cover. The tail cover is provided with a mounting protrusion for screws connecting the housing and the tail cover to be driven into. The air guide is fixed to the mounting protrusion with screws, and the screws on the air guide and the screws on the mounting protrusion are staggered.

[0022] By adopting the above technical solution, the installation of the air guide cover utilizes the existing structure on the motor body, sharing the same mounting protrusion. The screws for fixing the tail cover and the screws for fixing the air guide cover are interlocked and do not affect each other. The air guide cover is positioned by the motor body, the air guide plate is positioned by the connecting components, and the air guide cover and the air guide plate are positioned separately, which facilitates cooperation and ensures that the gaps are uniform. Excessive gaps will not be generated due to the rotation and misalignment of the air guide cover relative to the air guide plate, thus not affecting the airflow direction and therefore not easily affecting the heat dissipation effect.

[0023] Optionally, the length of the controller portion entering the air guide shroud is 1mm-10mm, and the outer ring of the air guide plate is curved towards the motor body.

[0024] By adopting the above technical solution, the air guide plate is bent to guide the air entering through the air inlet. The air in the air collection chamber is compressed radially and flows faster. The air driven by the heat dissipation impeller is better blown out towards the air outlet at the motor body under the guidance of the air guide plate.

[0025] Optionally, the junction box has a protruding windproof protrusion, the air guide cover has a matching groove for the windproof protrusion to be engaged, and the bottom rubber pad holes are formed on the windproof protrusion. There are multiple bottom rubber pad holes, and the number of bottom rubber pad holes is the same as the number of wires introduced into the junction box.

[0026] By adopting the above technical solution, the windproof protrusion serves two purposes: firstly, it is used for the pre-positioning of the air guide cover, facilitating its installation and fixation; secondly, it prevents air from flowing out of the space between the junction box and the air guide cover, controlling airflow to avoid the junction box location. Air flows more from other parts of the motor body's outer wall, thus guiding airflow to the heat dissipation fins on the motor's periphery, improving heat dissipation, and resolving the issue that air loss from the junction box would negatively impact heat dissipation.

[0027] In summary, by integrating the controller into the tail of the motor body, the entire motor becomes elongated, increasing the length requirement but reducing the height requirement while maintaining structural compactness. A forced-air cooling device is installed between the motor body and the controller, simultaneously cooling both components and improving heat dissipation. Because the forced-air cooling device separates the motor body and controller, it prevents heat accumulation between them. The single forced-air cooling device has minimal impact on the motor's compactness and overall size; the cooling impeller occupies very little space, only requiring the clearance between the motor body and controller for heat dissipation. This utilizes space already allocated in the design. The rotating impeller generates a mixed-flow air pressure difference, causing air near the motor body and controller to flow outwards, carrying away surface heat and effectively improving heat dissipation. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the motor structure in an embodiment of this application;

[0029] Figure 2 This is a schematic diagram of the installation structure of the motor body and the heat dissipation impeller in an embodiment of this application;

[0030] Figure 3 This is a cross-sectional view of the forced air cooling device in the embodiments of this application;

[0031] Figure 4 This is a schematic diagram of the controller structure in an embodiment of this application;

[0032] Figure 5 This is a schematic diagram of the installation structure of the controller and the air guide plate in the embodiments of this application;

[0033] Figure 6 This is a schematic diagram of the structure of the motor after the air guide cover is removed in the embodiment of this application;

[0034] Figure 7 This is a schematic diagram of the air guide component in the embodiments of this application.

[0035] Explanation of reference numerals in the attached drawings: 1. Motor body; 11. Housing; 12. Shell; 13. Tail cover; 131. Mounting protrusion; 14. End cover; 15. Output shaft; 16. Heat dissipation fins on the motor periphery; 2. Controller; 21. Heat dissipation fins on the controller end face; 22. Heat dissipation fins on the controller periphery; 23. Connecting recess; 24. End cable outlet; 3. Forced air cooling device; 31. Heat dissipation impeller; 311. Heat dissipation plate; 312. Protruding blades; 32. Air guide; 33. Air guide plate; 331. Flow hole; 332. Cable passage hole; 34. Air guide cover; 341. Mating groove; 342. Structural protrusion; 4. Connecting assembly; 41. Connecting sleeve; 42. Connecting bolt; 5. Reducer; 6. Air collection chamber; 7. Air outlet; 8. Air inlet; 9. Junction box; 91. Bottom rubber pad hole; 92. Windproof protrusion. Detailed Implementation

[0036] The following is in conjunction with the appendix Figure 1-7 This application will be described in further detail.

[0037] This application discloses a motor with a forced air cooling device and a composite controller.

[0038] Reference Figure 1 A motor with a forced air cooling device and a composite controller includes a motor body 1, a controller 2 and a forced air cooling device 3. The forced air cooling device 3 is installed between the motor body 1 and the controller 2, and the forced air cooling device 3 cools both the motor body 1 and the controller 2 simultaneously.

[0039] Reference Figure 2 and Figure 3 The motor body 1 includes a housing 11 and a stator, rotor, and bearings installed inside the housing 11. The housing 11 includes a shell 12, a tail cover 13, and an end cover 14. The shell 12 is continuous from front to back, while the tail cover 13 and end cover 14 are screwed onto the shell 12. The controller 2 is installed on the tail cover 13 via a connecting assembly 4. A certain distance is left between the tail cover 13 and the controller 2 to form a space for the forced air cooling device 3 to be installed. A reducer 5 is also installed on the end cover 14. In this embodiment, both ends of the rotor's output shaft 15 serve as output ends and pass through the tail cover 13 and end cover 14 respectively. One end of the output shaft 15 that passes through the end cover 14 extends into the reducer 5 and connects to the reducer 5, while the other end of the output shaft 15 that passes through the tail cover 13 cooperates with the forced air cooling device 3. That is, the motor body 1 in this embodiment is a dual-output motor.

[0040] The aforementioned reducer 5 is fixed to the end cover 14 with screws. The outer diameter of the end cover 14 is larger than the diameter of the housing 12, so that the outer circle of the end cover 14 extends out of the housing 12 for screw fixing with the reducer 5. The bottom of the reducer 5 extends downward to form a base structure for mounting the motor, while the motor body 1 is in a suspended state.

[0041] The housing 12 has protruding heat dissipation ribs 16 on the motor peripheral surface. The heat dissipation ribs 16 on the motor peripheral surface extend along the direction from the tail cover 13 to the end cover 14. There are multiple heat dissipation components on the motor peripheral surface, and the multiple heat dissipation ribs 16 on the motor peripheral surface are distributed around the housing 12.

[0042] Reference Figure 4 and Figure 5 The connecting component 4 is located on the side of the controller 2 facing the motor body 1. There are multiple connecting components 4, which are located at different positions on the outer ring of the controller 2. In this embodiment, there are four connecting components 4, which are arranged at equal angular intervals around the axis of the output shaft 15. The connecting component 4 includes a connecting sleeve 41 and a connecting bolt 42. The side of the controller 2 facing the motor body 1 is provided with a controller end face heat dissipation fin 21, and the outer wall of the controller 2 is provided with a controller peripheral surface heat dissipation fin 22. The end face of the controller 2 facing the motor body 1 is provided with a connecting hole 23 for the connecting sleeve 41 to be inserted. The circuit board of the electrical components inside the controller 2 is installed on the inner wall near the controller end face heat dissipation fin 21. One end of the connecting sleeve 41 is inserted into the connecting hole 23, and the other end abuts against the tail cover 13 of the motor body 1. The connecting bolt 42 is screwed into the connecting sleeve 41 from the inside of the controller 2, and the end of the connecting bolt 42 passes through the connecting sleeve 41 and is driven into the tail cover 13. By setting the connecting sleeve 41, the distance between the controller 2 and the motor body 1 during installation is accurately controlled.

[0043] The heat dissipation fins 21 on the end face of the controller and the heat dissipation fins 22 on the periphery of the controller are arranged alternately.

[0044] The aforementioned controller end face heat dissipation ribs 21 can be in various forms, including strip, wave, dot, or different shapes, and the radial length of each controller end face heat dissipation rib 21 can be different, but it is required that it does not obstruct the radial flow of air. For different controller end face heat dissipation ribs 21, the end of the controller end face heat dissipation rib 21 located on the outer ring of the controller end face is staggered with the controller peripheral heat dissipation rib 22.

[0045] Reference Figure 3 The forced air cooling device 3 includes a cooling impeller 31, a guide vane 32, and a driver that drives the cooling impeller 31 to rotate. In this embodiment, the cooling impeller 31 is coaxial with the output shaft 15 of the motor body 1. Specifically, the cooling impeller 31 is installed at one end of the output shaft 15 of the motor body 1 that passes through the tail cover 13. The motor body 1 drives the cooling impeller 31 to rotate and generate a mixed air pressure difference, so that the motor body 1 also acts as the driver of the forced air cooling device 3.

[0046] Reference Figure 2The heat dissipation impeller 31 includes a heat dissipation plate 311 and protruding blades 312 integrally protruding from the heat dissipation plate 311. The protruding blades 312 are disposed on the side of the heat dissipation plate 311 facing the air guide plate 33. There are multiple protruding blades 312, which extend radially along the rotation direction of the heat dissipation plate 311. The protruding blades 312 are of two lengths, and the protruding blades 312 of different lengths are arranged alternately.

[0047] Reference Figure 3 and Figure 6 The air guide component 32 includes an air guide plate 33 and an air guide shroud 34. The air guide plate 33 is located between the heat dissipation impeller 31 and the controller 2. The air guide shroud 34 is fitted over the air guide plate 33, and the tail end of the motor body 1 and one end of the controller 2 both enter the interior of the air guide shroud 34. The specific installation method of the air guide plate 33 is as follows: the connecting sleeve 41 of the connecting component 4 passes through the air guide plate 33 and secures the air guide plate 33. An air collecting cavity 6 is formed between the air guide plate 33 and the controller 2, and a flow hole 331 is opened in the center of the air guide plate 33. The area on the inner side of the protruding blade 312 does not overlap with the area on the heat dissipation plate 311 corresponding to the flow hole 331. At the same time, the air guide plate 33 is positioned to guide the air guide plate 33. The air guide plate 33 is also fixed to the controller 2 by screws, so that the position of the air guide plate 33 is fixed and will not slip on the connecting sleeve 41. The height of the heat dissipation rib 21 on the end face of the controller is 1mm-10mm. The distance between the heat dissipation rib 21 on the end face of the controller and the air guide plate 33 is less than or equal to 5mm. In order to ensure the contact area between the heat dissipation rib 21 on the end face of the controller and the air, the air guide plate 33 is provided with a protrusion to abut the heat dissipation rib, so that the heat dissipation rib and the air guide plate 33 will not directly contact each other, ensuring the heat dissipation area and air circulation. At the same time, the protrusion on the air guide plate 33 is also used for the screws used to fix the air guide plate 33 and the controller 2 to pass through.

[0048] The distance between the heat dissipation impeller 31 and the tail cover 13 is 2mm-5mm, and the distance between the heat dissipation impeller 31 and the air guide plate 33 is 2mm-5mm.

[0049] Reference Figure 2 and Figure 3One end of the air guide shroud 34 is fitted onto the outside of the motor body 1, forming an air outlet 7, and the other end is fitted onto the outside of the controller 2, forming an air inlet 8. The air guide plate 33 is located in the middle of the air guide shroud 34 and divides the internal space of the air guide shroud 34 into two parts. At the same time, the heat dissipation ribs 22 on the periphery of the controller extend into the air inlet 8. The distance between the heat dissipation ribs on the periphery of the controller 2 and the inner wall of the air guide shroud 34 is 2mm-5mm. The heat dissipation ribs 16 on the periphery of the motor extend into the air outlet 7. The air guide shroud 34 and the air guide plate 33 are set separately, and the air guide shroud 34 is fixed to the motor body. 1. The fit gap between the air guide shroud 34 and the air guide plate 33 is less than or equal to 2mm. The fit between the air guide shroud 34 and the air guide plate 33 is allowed to be irregular in shape, that is, the distance between the inner wall of the air guide shroud 34 and the outer edge of the air guide plate 33 is less than or equal to 2mm. The installation method of the air guide shroud 34 and the motor body 1 is as follows: the tail cover 13 is provided with a mounting protrusion 131 for screws to be driven into the connecting shell 12 and the tail cover 13. The air guide shroud 34 is fixed to the mounting protrusion 131 with screws. The screws on the air guide shroud 34 and the screws on the mounting protrusion 131 are staggered.

[0050] Furthermore, the connecting sleeve 41 of the connecting component 4 abuts against the mounting protrusion, and the screws for fixing the connecting sleeve 41 and the tail cover 13 are located on both sides of the screws for fixing the air guide shroud 34, making full use of the mounting protrusion. At the same time, the connecting component 4 can be located as far as possible on the outer ring, so that the diameter of the heat dissipation impeller 31 can be larger.

[0051] The screw connecting the tail cover 13 and the housing 12 passes through the mounting protrusion 131 and is located between the circumferential heat dissipation fins of the motor on the housing 12. Finally, the screw is screwed into the end cover 14. That is, the tail cover 13 and the end cover 14 are fixed by screws, thus fixing the tail cover 13, the end cover 14 and the housing 12. This arrangement ensures that the housing 12 will not be in a place with excessive thickness due to the fixing with the outer cover or the end cover 14, thereby indirectly improving the heat dissipation effect.

[0052] The length of the part of the controller 2 that enters the air guide shroud 34 is 1mm-10mm. The outer ring of the air guide plate 33 is bent in an arc towards the motor body 1, so that the air guide plate 33 on the inner wall of the air inlet 8 guides the air direction from axial to radial, while the air guide plate 33 on the inner wall of the air outlet 7 guides the air direction from radial to axial.

[0053] Reference Figure 1 , Figure 2 and Figure 7A junction box 9 is provided on the outer side of the tail of the motor body 1. A wire passage hole 332 is opened on the outer ring of the air guide plate 33. An end wire outlet hole 24 is opened on the outer edge of the side of the controller 2 facing the motor body 1. A bottom rubber pad hole 91 is opened in the junction box 9. The controller 2 controls the lead wire of the motor body 1 to enter the junction box 9 through the end wire outlet hole 24, the wire passage hole 332 and the bottom rubber pad hole 91 and finally enter the interior of the motor body 1. The power cord of the controller 2 enters the junction box 9 and exits the junction box 9 in the same way as the lead wire of the controller 2. The lead wire of the controller 2 is restricted from detaching by the air guide cover 34 when it is in the wire passage hole 332.

[0054] The junction box 9 has a windproof protrusion 92 protruding towards the controller 2. The inner wall of the air guide cover 34 has a mating groove 341 for the windproof protrusion 92 to be inserted. In order to accommodate the groove 341, the outer wall of the air guide cover 34 has a structural protrusion 342 protruding in the area corresponding to the mating groove 341. The bottom rubber pad holes 91 are opened on the end face of the windproof protrusion 92 facing the controller 2. There are multiple bottom rubber pad holes 91, and the number of bottom rubber pad holes 91 is the same as the number of wires introduced into the junction box 9. The multiple bottom rubber pad holes 91 are vertically spaced apart. At the same time, the windproof protrusion 92 and the mating groove 341 are separated from the groove wall of the controller 2 by a certain distance, so that the bottom rubber pad holes 91 are completely exposed, which facilitates the installation of the lead wires. When the air guide cover 34 is installed, it will not excessively squeeze the lead wires extending from the controller 2.

[0055] The implementation principle of a motor with a forced air cooling device and a composite controller in this application embodiment is as follows: the motor body 1 drives the cooling impeller 31 to rotate, and the air guide shroud 34 and the air guide plate 33 cooperate to form an air inlet 8 and an air outlet 7 between the controller 2 and the motor body 1. The cooling impeller 31 drives the air to enter the air collection chamber 6 through the air inlet 8, and then flows out through the air outlet 7. During this process, the air flows through the peripheral and end surfaces of the controller 2 and the tail and peripheral surfaces of the motor body 1 to dissipate heat, so that a single forced air cooling device 3 can simultaneously dissipate heat for the controller 2 and the motor body 1.

[0056] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A motor with a forced air cooling device and a composite controller, characterized in that: The application relates to a forced air cooling heat dissipation device for a motor, which comprises a motor body (1), a controller (2) and the forced air cooling heat dissipation device (3).

2. The motor with forced air cooling heat sink and composite controller according to claim 1, characterized in that: The forced air cooling heat dissipation device (3) further comprises a guide plate (33), one side of the controller (2) towards the motor body (1) is provided with connecting assemblies (4), the connecting assemblies (4) are multiple, the multiple connecting assemblies (4) are arranged at the outer circle of the controller (2), the connecting assemblies (4) connect the motor body (1) and the controller (2), the guide plate (33) is located between the heat dissipation impeller (31) and the controller (2), the output shaft (15) of the motor body (1) is a double-end output shaft (15), the heat dissipation impeller (31) is installed at the output end of the tail of the motor body (1), the connecting assemblies (4) pass through the guide plate (33) and fix the guide plate (33), the heat dissipation impeller (31) comprises a heat dissipation plate (311) and protruding blades (312) arranged on the heat dissipation plate (311), the protruding blades (312) are arranged on the side of the heat dissipation plate (311) towards the guide plate (33), the protruding blades (312) are multiple, the multiple protruding blades (312) extend radially along the rotation direction of the heat dissipation plate (311), a wind collecting cavity (6) is formed between the guide plate (33) and the controller (2), and a flow-through hole (331) is formed in the center of the guide plate (33).

3. The motor with forced air cooling heat sink and composite controller according to claim 2, characterized in that: The forced air cooling heat dissipation device (3) further comprises a guide cover (34), the guide cover (34) and the guide plate (33) form a guide piece (32), one end of the guide cover (34) is sleeved on the outer side of the motor body (1) and forms an air outlet (7), the other end of the guide cover (34) is sleeved on the outer side of the controller (2) and forms an air inlet (8), the guide plate (33) is located in the middle part of the guide cover (34) and divides the space in the guide cover (34) into two parts.

4. The motor with forced air cooling heat sink and composite controller according to claim 3, characterized in that: The motor body (1) tail outside is provided with a junction box (9), the air deflector (33) outer circle is provided with a wire hole (332), the controller (2) towards the one side of the motor body (1) outside is provided with end part wire hole (24), the junction box (9) is provided with bottom rubber pad hole (91), the controller (2) control the motor body (1) lead wire passes through the end part wire hole (24), the wire hole (332) and the bottom rubber pad hole (91) is introduced into the junction box (9) and finally enters the inside of the motor body (1), the power cord of the controller (2) and the lead wire of the controller (2) same way into the junction box (9) and lead out the junction box (9).

5. The motor with forced air cooling heat sink and composite controller according to claim 3, characterized in that: The controller (2) towards the one side of the motor body (1) is provided with controller end surface heat dissipation rib (21), the outer wall of the controller (2) is provided with controller peripheral surface heat dissipation rib (22), the controller peripheral surface heat dissipation rib (22) extends into the air inlet (8), the outer wall of the motor body (1) is provided with motor peripheral surface heat dissipation rib (16), the motor peripheral surface heat dissipation rib (16) extends into the air outlet (7), the controller end surface heat dissipation rib (21) has multiple ways including strip, wave, point or shape, and each controller end surface heat dissipation rib (21) allows the radial length to be different, but requires not to hinder the radial flow of air, the height of the controller end surface heat dissipation rib (21) is 1mm-10mm, the spacing between the controller end surface heat dissipation rib (21) and the air deflector (33) is less than or equal to 5mm.

6. The motor with forced air cooling heat sink and composite controller according to claim 5, characterized in that: The controller end surface heat dissipation rib (21) and the controller peripheral surface heat dissipation rib (22) are staggered.

7. The motor with forced air cooling heat sink and composite controller according to claim 3, characterized in that: The air deflector (33) and the air deflector (33) are provided separately, the air deflector (33) is fixed to the motor body (1), and the cooperation gap between the air deflector (33) and the air deflector (33) is less than or equal to 2mm, and the cooperation between the air deflector (33) and the air deflector (33) allows irregular shape.

8. The motor with forced air cooling heat sink and composite controller according to claim 7, characterized in that: The shell (11) of the motor body (1) includes a shell body (12) and a tail cover (13), the tail cover (13) is provided with a mounting protrusion (131) for screwing the shell body (12) and the tail cover (13), the air deflector (34) is screwed with the mounting protrusion (131), and the screw on the air deflector (34) is staggered with the screw on the mounting protrusion (131).

9. The motor with forced air cooling heat sink and composite controller according to claim 3, characterized in that: The length of the controller (2) into the air deflector (34) is 1mm-10mm, and the outer circle of the air deflector (33) is arc-bent towards the motor body (1).

10. The motor with forced air cooling heat sink and composite controller according to claim 4, characterized in that: The junction box (9) is provided with a wind blocking protrusion (92), the air deflector (34) is provided with a matching card slot (341) for the wind blocking protrusion (92), the bottom rubber pad hole (91) is provided in the wind blocking protrusion (92), and the bottom rubber pad hole (91) has multiple, the number of the bottom rubber pad hole (91) is consistent with the number of the wire introduced into the junction box (9).

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