Intelligent integrated permanent magnet synchronous motor

Abstract

The invention relates to an intelligent integrated permanent magnet synchronous motor which comprises a motor body, an electric control unit and a display screen unit, the motor body comprises a motor shell, a motor rotating shaft, a motor stator and a motor rotor, and connecting bearings are arranged in the side walls of the two sides of the motor shell respectively. The connecting bearing comprises an outer bearing ring sleeve, an inner bearing ring sleeve and a plurality of rollers, the inner bearing ring sleeve is sleeved on the motor rotating shaft, the inner bearing ring sleeve comprises a bearing ring sleeve pipe and a fan sleeve pipe, the fan sleeve pipe is fixedly connected to the end part of the inner side of the bearing ring sleeve pipe, the fan sleeve pipe is arranged in the motor shell, and the rollers are arranged in the fan sleeve pipe. The fan sleeve, the bearing ring sleeve and the motor rotating shaft have the same central axis.

Description

TECHNICAL FIELD

[0001] The application relates to a permanent magnet synchronous motor, in particular to an integrated permanent magnet synchronous motor with a built-in cooling fan connected to a connecting bearing and a cooling air duct in the motor. BACKGROUND

[0002] It is known that a permanent magnet synchronous motor (PMSM) is a synchronous motor that uses permanent magnets to generate a magnetic field, and the rotational speed of the rotor is consistent with the current frequency of the stator winding. The permanent magnet synchronous motor is generally composed of a stator, a rotor and an end cover. The stator is basically the same as that of a common induction motor, and a lamination structure is adopted to reduce the iron loss of the motor during operation. The rotor can be made of solid or laminated. The armature winding can adopt concentrated full-pitch winding, distributed short-pitch winding or non-conventional winding. The working principle of the permanent magnet synchronous motor is based on the interaction between the rotating magnetic field generated by the stator and the magnetic field generated by the permanent magnets on the rotor. The rotor is installed with pre-magnetized permanent magnets, which can generate a strong magnetic field when rotating, thereby providing greater output torque. The control system of the motor accurately adjusts the current to ensure that the motor rotor can rotate synchronously with the rotating magnetic field, maintaining a stable operating state. At present, the permanent magnet synchronous motor is a widely used motor type, which has the advantages of high efficiency, good dynamic response performance, low noise, etc., and is widely used in electric vehicles, robots and other fields that require high efficiency, high dynamic performance and low noise. However, as for the current high-power integrated permanent magnet synchronous motor, the structure design is generally limited by the poor ventilation and cooling effect. SUMMARY

[0003] The technical scheme adopted by the application is as follows: an intelligent integrated permanent magnet synchronous motor includes a motor body, an electric control unit and a display screen unit, wherein the electric control unit is arranged above the motor body, and the display screen unit is arranged above the electric control unit.

[0004] The electric control unit includes an electric control shell and an electric control part, the electric control part is arranged in the electric control shell, the display screen unit includes a display screen shell, a display screen body and a display mainboard, the display mainboard is arranged on the back of the display screen body, and the display screen body and the display mainboard are arranged in the display screen shell, The motor body includes a motor shell, a motor rotating shaft, a motor stator and a motor rotor, wherein the motor rotor is sleeved on the motor rotating shaft, the motor stator is arranged around the motor rotor, and the motor rotating shaft, the motor stator and the motor rotor are arranged in the motor shell.

[0005] The connecting bearing is arranged in the side wall of the motor shell, the motor rotating shaft is arranged in the connecting bearing, the connecting bearing comprises an outer bearing sleeve, an inner bearing sleeve and a plurality of rollers, the plurality of rollers are arranged between the outer bearing sleeve and the inner bearing sleeve, the outer bearing sleeve is fixedly arranged in the side wall of the motor shell, the inner bearing sleeve is sleeved on the motor rotating shaft, the inner bearing sleeve comprises a bearing sleeve pipe and a fan sleeve pipe, the fan sleeve pipe is fixedly connected to the inner side end of the bearing sleeve pipe, the fan sleeve pipe is located in the motor shell, the fan sleeve pipe, the bearing sleeve pipe and the motor rotating shaft have the same central axis.

[0006] The fan sleeve pipe is sleeved with a pad sleeve, the pad sleeve comprises a sleeve and a protection disc, the protection disc is fixedly connected to the end of the sleeve, the protection disc is located between the sleeve and the outer bearing sleeve, an internal heat dissipation fan is sleeved on the sleeve of the pad sleeve, the internal heat dissipation fan, the pad sleeve, the inner bearing sleeve and the motor rotating shaft rotate coaxially.

[0007] The beneficial effects of the present application are as follows: as described above, when the motor rotating shaft rotates, the inner bearing sleeve drives the internal heat dissipation fan to rotate coaxially, the internal heat dissipation fan is directly connected to the inner bearing sleeve for rotation, since the connecting bearing is arranged in the side wall of the motor shell, the position of the inner bearing sleeve is stable and the rotation is stable, the present application directly connects the internal heat dissipation fan to the inner bearing sleeve for rotation, which can improve the rotation stability of the internal heat dissipation fan, and can avoid the occurrence of unstable rotation of the rotating shaft caused by the rotation of the fan. BRIEF DESCRIPTION OF DRAWINGS

[0008] Figure 1 It is a perspective view of the present application.

[0009] Figure 2 It is a front view of the present application.

[0010] Figure 3 It is a cross-sectional view of the present application.

[0011] Figure 4 It is an exploded view of the present application.

[0012] Figure 5 It is a position view of the connecting bearing of the present application.

[0013] Figure 6 It is a local enlarged view of the connecting bearing of the present application.

[0014] Figure 7 It is an exploded view of the connecting bearing of the present application.

[0015] Figure 8This is a schematic diagram of the counterweight plate of the present invention.

[0016] Figure 9 This is a schematic diagram of the heat dissipation airflow of the present invention. Detailed Implementation

[0017] like Figures 1 to 9 As shown, an intelligent integrated permanent magnet synchronous motor includes a motor body 10, an electronic control unit 20, and a display screen unit 30. The electronic control unit 20 is disposed above the motor body 10, and the display screen unit 30 is disposed above the electronic control unit 20. The electronic control unit 20 includes an electronic control housing 21 and an electronic control part 22, which is disposed within the electronic control housing 21. The display screen unit 30 includes a display screen housing 31, a display screen body 32, and a display motherboard 33, which is disposed on the back of the display screen body 32. The display screen body 32 and the display motherboard 33 are disposed within the display screen housing 31.

[0018] The motor body 10 includes a motor housing 11, a motor shaft 12, a motor stator 13, and a motor rotor 14. The motor rotor 14 is sleeved on the motor shaft 12, and the motor stator 13 is arranged around the motor rotor 14. The motor shaft 12, the motor stator 13, and the motor rotor 14 are arranged in the motor housing 11. Connecting bearings 100 are respectively arranged in the two side walls 110 of the motor housing 11, and the two ends of the motor shaft 12 are respectively passed through the two connecting bearings 100.

[0019] The connecting bearing 100 includes an outer bearing ring 120, an inner bearing ring 130, and several rollers 140. The rollers 140 are rolled between the outer bearing ring 120 and the inner bearing ring 130. The outer bearing ring 120 is fixedly disposed in the side wall 110 of the motor housing 11. The inner bearing ring 130 is sleeved on the motor shaft 12. The inner bearing ring 130 includes a bearing ring sleeve tube 131 and a fan sleeve tube 132. The fan sleeve tube 132 is fixedly connected to the inner end of the bearing ring sleeve tube 131 and is located in the motor housing 11. The fan sleeve tube 132, the bearing ring sleeve tube 131, and the motor shaft 12 have the same central axis 133.

[0020] A pad sleeve 150 is fitted onto the fan sleeve 132. The pad sleeve 150 includes a sleeve 151 and a protective disc 152. The protective disc 152 is fixedly connected to the end of the sleeve 151 and is located between the sleeve 151 and the outer bearing ring 120.

[0021] The built-in cooling fan 200 is sleeved on the sleeve 151 of the pad sleeve 150, and the built-in cooling fan 200, the pad sleeve 150, the inner bearing ring 130 and the motor shaft 12 rotate coaxially.

[0022] As described above, when the motor shaft 12 of the present invention rotates, it drives the built-in cooling fan 200 to rotate coaxially through the inner bearing ring 130. The built-in cooling fan 200 is directly connected to the inner bearing ring 130 for rotation. Since the connecting bearing 100 is located in the side wall 110 of the motor housing 11, the position of the inner bearing ring 130 is stable and the rotation is smooth. The present invention can improve the rotational smoothness of the built-in cooling fan 200 by directly connecting it to the inner bearing ring 130 for rotation, and at the same time can avoid the occurrence of unstable rotation of the shaft caused by the fan being mounted on the shaft.

[0023] In specific implementation, the built-in cooling fan 200 includes a fan connecting plate 210 and a fan blade turntable 220, wherein the fan blade turntable 220 is arranged around the fan connecting plate 210, and a number of blades 221 are provided on the fan blade turntable 220.

[0024] The fan connecting plate 210 includes a sleeve cavity 211 and an auxiliary rib plate 212. The sleeve 151 of the pad tube 150 is inserted into the sleeve cavity 211. One side of the auxiliary rib plate 212 is fixedly connected to the fan connecting plate 210, and the other side of the auxiliary rib plate 212 is abutted on the motor shaft 12. The built-in cooling fan 200 can be fixedly sleeved on the pad tube 150 through the sleeve cavity 211 and the auxiliary rib plate 212.

[0025] like Figure 8 As shown, in a specific implementation, the built-in cooling fan 200 also includes a counterweight plate 230. The counterweight plate 230 is disposed on the other side of the built-in cooling fan 200, corresponding to the protective plate 152 of the pad sleeve 150. The counterweight plate 230 is connected to the fan connecting plate 210. The counterweight plate 230 includes a connecting part 231 and a counterweight part 232. The connecting part 231 is arranged around the counterweight part 232. A through hole 233 is opened in the center of the counterweight part 232. The motor shaft 12 passes through the center of the through hole 233. The thickness of the counterweight part 232 increases from the periphery of the counterweight part 232 towards the through hole 233. The design of the counterweight plate 230 can concentrate the center of gravity of the built-in cooling fan 200 at its central axis, thereby improving the rotational stability of the built-in cooling fan 200.

[0026] like Figure 3 , 9As shown, in the embodiment, the motor shell 11 has a motor cavity 510, The motor shell 11 is provided with a first communication port 511 at the top, the electric control shell body 21 has an electric control shell cavity 520, the electric control shell body 21 is provided with a first air port 521 on the side wall, the electric control shell body 21 is provided with a second communication port 522 at the bottom, the electric control shell body 21 is provided with a third communication port 523 at the top, and the display screen shell 31 has a display screen shell cavity 530, the display screen shell 31 is provided with a second air port 531 on the side wall, and the display screen shell 31 is provided with a fourth communication port 532 at the bottom.

[0027] The motor cavity 510 and the electric control shell cavity 520 are communicated with each other through the first communication port 511 and the second communication port 522, the first air port 521 is communicated with the electric control shell cavity 520, the electric control shell cavity 520 and the display screen shell cavity 530 are communicated with each other through the third communication port 523 and the fourth communication port 532, and the second air port 531 is communicated with the display screen shell cavity 530.

[0028] A heat dissipation air duct 600 is formed by the second air port 531, the display screen shell cavity 530, the fourth communication port 532, the first air port 521, the third communication port 523, the electric control shell cavity 520, the second communication port 522, the first communication port 511, and the motor cavity 510.

[0029] The built-in heat dissipation fan 200, the motor shaft 12, the motor stator 13, and the motor rotor 14 are located in the motor cavity 510, the electric control part 22 of the electric control unit 20 is located in the electric control shell cavity 520, and the display mainboard 33 of the display screen unit 30 is located in the display screen shell cavity 530.

[0030] The built-in heat dissipation fan 200, the motor shaft 12, the motor stator 13, the motor rotor 14, the electric control part 22, and the display mainboard 33 are located in the heat dissipation air duct 600, the built-in heat dissipation fan 200 rotates coaxially with the motor shaft 12, and the airflow 700 circulates between the heat dissipation air duct 600 and the external space 800, so as to achieve the effect of simultaneously ventilating and dissipating heat of each component in the motor through the built-in heat dissipation fan 200 and the heat dissipation air duct 600.

[0031] In the embodiment, dustproof nets are arranged in the first communication port 511, the first air port 521, the second communication port 522, the third communication port 523, the second air port 531, and the fourth communication port 532.

[0032] As Figure 7As shown, in specific implementation, the side wall 110 of the motor housing 11 is provided with an inner recess wall 111, and the connecting bearing 100 is arranged in the inner recess wall 111.

[0033] In specific implementation, the motor stator 13 is in a stator sheet laminated structure. In specific implementation, the motor rotor 14 is made of permanent magnetic material. In specific implementation, the motor rotor 14 is a multi-polar permanent magnetic rotor.

Claims

1. An intelligent integrated permanent magnet synchronous motor, comprising a motor body, an electronic control unit, and a display screen unit, wherein, The electronic control unit is located above the motor body, and the display screen unit is located above the electronic control unit. The electronic control unit includes an electronic control housing and an electronic control component, the electronic control component being disposed within the electronic control housing. The display screen unit includes a display screen housing, a display screen body, and a display mainboard, the display mainboard being disposed on the back of the display screen body. The display screen body and the display mainboard are disposed within the display screen housing. The motor body includes a motor housing, a motor shaft, a motor stator, and a motor rotor. The motor rotor is sleeved on the motor shaft, and the motor stator is disposed around the motor rotor. The motor shaft, motor stator, and motor rotor are housed within the motor housing. The characteristic feature is that: Connecting bearings are respectively installed in the two side walls of the motor housing. The two ends of the motor shaft are respectively inserted into two of these connecting bearings. Each connecting bearing includes an outer bearing ring, an inner bearing ring, and several rollers. The rollers are rotatably disposed between the outer and inner bearing rings. The outer bearing ring is fixedly disposed in the side wall of the motor housing. The inner bearing ring is sleeved on the motor shaft and includes a bearing ring tube and a fan tube. The fan tube is fixedly connected to the inner end of the bearing ring tube and is located within the motor housing. The fan tube, the bearing ring tube, and the motor shaft share the same central axis. A pad sleeve is fitted on the fan sleeve. The pad sleeve includes a sleeve and a protective disc. The protective disc is fixedly connected to the end of the sleeve and is located between the sleeve and the outer bearing ring. The built-in cooling fan is fitted on the sleeve of the pad sleeve. The built-in cooling fan, the pad sleeve, the inner bearing ring, and the motor shaft rotate coaxially.

2. The intelligent integrated permanent magnet synchronous motor as described in claim 1, characterized in that: The motor housing has an internal cavity, and a first connecting opening is provided at the top of the motor housing. The electrical control housing has an internal cavity, and a first air vent is provided on the side wall of the electrical control housing. A second connecting opening is provided at the bottom of the electrical control housing, and a third connecting opening is provided at the top of the electrical control housing. The display screen housing has an internal cavity, and a second air vent is provided on the side wall of the display screen housing. A fourth connecting opening is provided at the bottom of the display screen housing. The inner cavity of the motor and the inner cavity of the electronic control housing are interconnected through the first and second connecting ports. The first air vent is connected to the inner cavity of the electronic control housing. The inner cavity of the electronic control housing and the inner cavity of the display screen housing are interconnected through the third and fourth connecting ports. The second air vent is connected to the inner cavity of the display screen housing. A heat dissipation air duct is formed by the connection of the second air vent, the inner cavity of the display screen housing, the fourth connecting port, the first air vent, the third connecting port, the inner cavity of the electronic control housing, the second connecting port, the first connecting port, and the inner cavity of the motor. The built-in cooling fan, the motor shaft, the motor stator, and the motor rotor are located inside the motor cavity; the electronic control unit's electronic control section is located inside the electronic control housing cavity; and the display motherboard of the display unit is located inside the display housing cavity. The built-in cooling fan, the motor shaft, the motor stator, the motor rotor, the electronic control unit, and the display motherboard are located in the cooling duct. The built-in cooling fan rotates coaxially with the motor shaft, causing airflow to circulate between the cooling duct and the external space.

3. The intelligent integrated permanent magnet synchronous motor as described in claim 1 or 2, characterized in that: The built-in cooling fan includes a fan connecting plate and a fan blade disk, wherein the fan blade disk is arranged around the fan connecting plate and has several blades. The fan connecting plate includes a sleeve cavity and an auxiliary rib plate. The sleeve of the pad tube is inserted into the sleeve cavity. One side of the auxiliary rib plate is fixedly connected to the fan connecting plate, and the other side of the auxiliary rib plate is abutted on the motor shaft. The built-in cooling fan can be fixedly sleeved on the pad tube through the sleeve cavity and the auxiliary rib plate.

4. The intelligent integrated permanent magnet synchronous motor as described in claim 3, characterized in that: The built-in cooling fan also includes a counterweight plate, which is disposed on the other side of the built-in cooling fan, corresponding to the protective plate of the gasket sleeve. The counterweight plate is connected to the fan connecting plate. The counterweight plate includes a connecting part and a counterweight part. The connecting part is arranged around the counterweight part, and a through hole is opened in the center of the counterweight part. The motor shaft passes through the center of the through hole.

5. The intelligent integrated permanent magnet synchronous motor as described in claim 4, characterized in that: The thickness of the counterweight increases from the periphery of the counterweight towards the through hole.

6. The intelligent integrated permanent magnet synchronous motor as described in claim 2, characterized in that: Dustproof nets are installed in the first connecting port, the first air vent, the second connecting port, the third connecting port, the second air vent, and the fourth connecting port.

7. The intelligent integrated permanent magnet synchronous motor as described in claim 1, characterized in that: The motor housing has a recessed wall on its side wall, and the connecting bearing is disposed in the recessed wall.

8. The intelligent integrated permanent magnet synchronous motor as described in claim 1, characterized in that: The stator of this motor has a stator lamination structure.

9. The intelligent integrated permanent magnet synchronous motor as described in claim 1, characterized in that: The motor rotor is made of permanent magnet material.

10. The intelligent integrated permanent magnet synchronous motor as described in claim 1, characterized in that: The motor rotor is a multi-polarized permanent magnet rotor.

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