CN211908572U - An outer rotor motor - Google Patents

Abstract

The utility model discloses an external rotor motor, which comprises a rotating shaft, a stator component, an external rotor and a sleeve seat, wherein the stator component comprises a stator core, an end insulation and a coil winding, the sleeve seat comprises a bottom plate and a sleeve which protrudes upwards from the middle of the bottom plate, the external rotor comprises a casing sleeve and a plurality of permanent magnets which are arranged on the inner wall surface of the casing sleeve, a cavity is arranged in the casing sleeve, a flange extends outwards from the opening of the casing sleeve, a centrifugal fan is arranged at the bottom of the flange, an air outlet is arranged between the centrifugal fan and the bottom plate, a labyrinth air inlet is arranged at the top of the casing sleeve, the labyrinth air inlet, the cavity and the air outlet are communicated, air enters the motor from the labyrinth air inlet and then is discharged from the air outlet, when the motor runs, the external rotor rotates to drive the centrifugal fan to rotate together, the air, effectively reduce the winding temperature, the radiating effect is good, guarantees the motor normal operating.

Description

An outer rotor motor

Technical field:

The utility model relates to an outer rotor motor.

Background technique:

The existing outer rotor motor includes a rotating shaft, a stator assembly, an outer rotor and a sleeve seat, wherein the stator assembly includes a stator core, end insulation and coil windings, and the sleeve seat includes a bottom plate and a middle from the bottom plate. The upwardly protruding sleeve is provided with bearing chambers at both ends of the sleeve, the bearings are installed in the bearing chambers, the rotating shaft is located in the sleeve and the two ends are respectively supported on the bearings, and the outer rotor includes a casing sleeve and A number of permanent magnets installed on the inner wall of the casing sleeve, one end of the rotating shaft protrudes from the sleeve and is installed and connected to the casing sleeve, the stator assembly is nested and installed on the outside of the sleeve, and the outer rotor sleeve is set outside the stator assembly , a flange protrudes from the opening of the casing sleeve, a wind wheel is installed at the bottom of the flange, a number of raised cooling fins are arranged on the bottom plate at the position below the wind wheel, and two adjacent cooling fins are provided. An air duct is formed between the sheets, and an air outlet and heat dissipation structure is formed at the bottom of the motor. Since the top is closed, there is no air intake design. The interior of the motor is a semi-closed structure, and the stator is in the central area of the interior, so the heat generated by the winding is difficult to dissipate or discharge , the temperature of the winding is relatively high, and it still does not form convection for the heat inside the motor, and the heat dissipation capacity is limited.

Invention content:

The purpose of this utility model is to provide an external rotor motor, which solves the problem that the bottom of the external rotor motor forms an air outlet and heat dissipation structure in the prior art. The heat inside the motor forms convection, and the heat generated by the stator winding in the inner central area is difficult to dissipate or discharge, resulting in a technical problem of relatively high winding temperature.

The purpose of this utility model is achieved through the following technical solutions.

The purpose of this utility model is to provide an outer rotor motor, including a rotating shaft, a stator assembly, an outer rotor and a sleeve seat, the stator assembly includes a stator iron core, end insulation and coil windings, and the sleeve seat includes a bottom plate and extends from the middle of the bottom plate to the outer rotor. The upper convex sleeve, the outer rotor includes a casing sleeve and a number of permanent magnets installed on the inner wall surface of the casing sleeve. The cylinders are installed and connected together, the stator assembly is nested and installed on the outside of the sleeve, the outer rotor sleeve is set outside the stator assembly, a flange protrudes from the opening of the casing sleeve, and a centrifugal fan is installed at the bottom of the flange. There is an air outlet between the fan and the bottom plate, and it is characterized in that: the top of the casing sleeve is provided with a labyrinth air inlet, the labyrinth air inlet, the cavity and the air outlet are connected, and the air enters the motor from the labyrinth air inlet The inside is then discharged from the air outlet. When the motor is running, the rotation of the outer rotor drives the centrifugal fan to rotate together. The centrifugal fan pulls out the air inside the motor, so that the airflow is directionally circulated inside the motor to dissipate heat.

The above-mentioned labyrinth air inlet includes an end cover and a baffle cover. The end cover is installed on the top of the casing sleeve, and the baffle cover is installed on the top surface of the end cover. The upper part of the end cover corresponding to the coil winding is provided with A number of air inlet slots, the outer side and inner side of the air inlet slot are respectively provided with a first baffle plate and a second baffle plate, the top surface of the end cover is provided with a third baffle plate, and the third baffle plate is located on the side of the first baffle plate. A first groove is formed between the periphery and the first baffle. The baffle cover includes a first annular plate and a second annular plate. The top end of the first annular plate and the second annular plate is connected with a connecting plate. The baffle cover When the body is installed on the end cover, the second baffle and the second annular plate are sleeved together, the first annular plate is inserted into the first groove to form a labyrinth air inlet channel, and the labyrinth air inlet channel is communicated with the air inlet slot. The connecting plate covers the air inlet slot.

The height H1 of the third baffle is lower than the height H2 of the first baffle.

The baffle cover is locked on the end cover by screws, and a mounting plate protrudes inward from the bottom end of the second annular plate. The mounting plate of the baffle cover is provided with a number of first installation holes, and the end cover is Several second mounting holes corresponding to several first mounting holes of the mounting plate are provided, and screws are screwed into the first mounting holes and the second mounting holes to lock the baffle cover on the end cover.

A plurality of first fan blade reinforcing ribs are arranged on the bottom surface of the above-mentioned end cover.

The above-mentioned centrifugal fan includes an outer ring of the centrifugal fan at the bottom. The outer ring of the centrifugal fan is provided with a number of fan blades in the upper direction. The inner side of the outer ring of the centrifugal fan is provided with an inner ring of the centrifugal fan. The diameter of the inner ring of the centrifugal fan is smaller than that of the centrifugal fan. The diameter of the outer ring, the inner side of the outer ring of the centrifugal fan is connected to the inner ring of the centrifugal fan through several connection points, the gap between the inner ring of the centrifugal fan and the outer ring of the centrifugal fan forms an air inlet, and there are several There are raised radiating fins, and an air duct is formed between two adjacent radiating fins. The outer ring of the centrifugal fan covers the top of the air duct. The outer ring of the centrifugal fan, the flange and several fan blades form a centrifugal fan. When the outer rotor rotates, the centrifugal fan is driven to rotate, and the airflow enters the air duct radially, then flows into the gap, and is thrown out radially outward under the action of several fan blades.

Several blades are arranged on the inner side wall of the inner ring of the centrifugal fan.

The above-mentioned inner ring of the centrifugal fan includes a top plate, a first retaining ring and a second retaining ring protruding downward from the top plate, a groove is formed between the first retaining ring and the second retaining ring, and an inner retaining ring is protruding upward from the bottom plate. The water ring and the outer water retaining ring, the inner water retaining ring and the outer water retaining ring are located on the periphery of the sleeve, a water storage groove is formed between the inner water retaining ring and the outer water retaining ring, and the top of the inner water retaining ring is embedded in the groove, The second retaining ring is inserted into the water storage tank to form a labyrinth air outlet between the centrifugal fan and the bottom plate.

A plurality of second fan blade reinforcing ribs are arranged on the end surface of the above-mentioned bottom plate.

The above-mentioned outer water retaining ring is provided with a plurality of notches, and a shielding plate is arranged on the outer side of the notches.

Compared with the prior art, the utility model has the following effects:

1) The utility model includes a rotating shaft, a stator assembly, an outer rotor and a sleeve seat, the stator assembly includes a stator core, end insulation and coil windings, the sleeve seat includes a bottom plate and a sleeve protruding upward from the middle of the bottom plate, and the outer The rotor includes a casing sleeve and a number of permanent magnets installed on the inner wall of the casing sleeve. The casing sleeve is provided with a cavity, and a flange protrudes from the opening of the casing sleeve, which is installed at the bottom of the flange. There is a centrifugal fan, and an air outlet is arranged between the centrifugal fan and the bottom plate, and it is characterized in that: a labyrinth air inlet is arranged on the top of the casing sleeve, the labyrinth air inlet, the cavity and the air outlet are connected, and the air flows from the labyrinth air inlet. The air inlet enters the inside of the motor and then is discharged from the air outlet. When the motor is running, the rotation of the outer rotor drives the centrifugal fan to rotate together. The centrifugal fan draws out the air inside the motor, so that the airflow is directionally circulated inside the motor to dissipate heat, effectively reducing the winding temperature. The heat dissipation effect is good to ensure the normal operation of the motor.

2) Other advantages of the present invention are described in detail in the embodiment section.

Description of drawings:

Fig. 1 is the perspective view of the present utility model;

Fig. 2 is the partial structure exploded view of the present utility model;

Fig. 3 is another angle partial structure exploded view of the present utility model;

Fig. 4 is the structural representation of the present utility model;

Fig. 5 is another angle structure schematic diagram of the present utility model;

Fig. 6 is the top view of the present utility model;

Fig. 7 is the sectional view of A-A in Fig. 6;

Fig. 8 is a partial enlarged view of B in Fig. 7;

Fig. 9 is a partial enlarged view of C in Fig. 7;

Fig. 10 is the structural representation of the middle end cap of the present invention;

FIG. 11 is a schematic diagram of the airflow direction in the present invention.

Detailed ways:

The present utility model will be described in further detail below through specific embodiments and in conjunction with the accompanying drawings.

As shown in FIG. 1 to FIG. 11 , this embodiment provides an outer rotor motor, including a rotating shaft 1 , a stator assembly 2 , an outer rotor 3 and a sleeve seat 4 , and the stator assembly 2 includes a stator iron core 21 , end insulation 22 and coil winding 23, the sleeve seat 4 includes a bottom plate 41 and a sleeve 42 protruding upward from the middle of the bottom plate 41, the outer rotor 3 includes a casing sleeve 31 and a plurality of permanent magnets mounted on the inner wall of the casing sleeve 31. The magnet 32, the casing sleeve 31 is provided with a cavity 310, one end of the rotating shaft 1 protrudes from the sleeve 42 and is installed and connected to the casing sleeve 31, the stator assembly 2 is nested and installed on the outside of the sleeve 42, the outer rotor 3 sets are arranged outside the stator assembly 2, a flange 33 protrudes from the opening of the casing sleeve 31, a centrifugal fan 5 is installed at the bottom of the flange 33, and an air outlet 400 is arranged between the centrifugal fan 5 and the bottom plate 41, It is characterized in that: the top of the casing sleeve 31 is provided with a labyrinth air inlet 300, the labyrinth air inlet 300, the cavity 310 and the air outlet 400 are connected, and the air enters the motor from the labyrinth air inlet 300 and then flows from the inside of the motor. The air outlet 400 is discharged. When the motor is running, the outer rotor 3 rotates and drives the centrifugal fan 5 to rotate together.

The labyrinth air inlet 300 includes an end cover 301 and a baffle cover 302, the end cover 301 is installed on the top of the casing sleeve 31, the baffle cover 302 is installed on the top surface 3014 of the end cover 301, and the end cover 301 corresponds to the coil The upper part of the winding 23 is provided with a number of air inlet slots 3011 , the outer and inner sides of the air inlet slot 3011 are respectively provided with a first baffle 3012 and a second baffle 3013 , and a third baffle 3014 is arranged on the top surface 3014 of the end cover 301 . The baffle 3015 and the third baffle 3015 are located on the periphery of the first baffle 3012 and form a first groove 3016 with the first baffle 3012 . The baffle cover 302 includes a first annular plate 3021 and a second annular plate 3022 , the top end of the first annular plate 3021 and the second annular plate 3022 is connected with a connecting plate 3023. When the baffle cover 302 is installed on the end cover 301, the second baffle 3013 and the second annular plate 3022 are assembled together. The annular plate 3021 is inserted into the first groove 3016 to form a labyrinth air inlet channel 3017. The labyrinth air inlet channel 3017 communicates with the air inlet slot 3011, and the connecting plate 3023 covers the air inlet slot 3011, effectively preventing Rain comes in.

The height H1 of the third baffle 3015 is lower than the height H2 of the first baffle 3012, which effectively prevents rainwater from entering the interior of the motor, and has a good waterproof effect.

The baffle cover 302 is locked on the end cover 301 by screws, a mounting plate 3024 protrudes from the bottom end of the second annular plate 3022, and a plurality of first mounting holes 3025 are provided on the mounting plate 3024 of the baffle cover 302 , the end cover 301 is provided with several second mounting holes 3018 corresponding to several first mounting holes 3025 of the mounting plate 3024, screw the screws into the first mounting holes and the second mounting holes to lock the baffle cover 302 On the end cover 301, the structure is simple and the installation is simple.

The bottom surface 3019 of the end cover 301 is provided with a plurality of first fan blade reinforcing ribs 6, which can directly cool the windings by the air entering from the outside, and can also accelerate the air flow toward the other end, and the heat dissipation effect is good.

The centrifugal fan 5 includes a centrifugal fan outer ring 51 at the bottom. The centrifugal fan outer ring 51 is provided with a number of fan blades 52 in the circumferential direction. The centrifugal fan inner ring 53 is arranged inside the centrifugal fan outer ring 51. The diameter of 53 is smaller than the diameter of the outer ring 51 of the centrifugal fan, the inner side of the outer ring 51 of the centrifugal fan is connected with the inner ring 53 of the centrifugal fan through several connection points, and the gap 55 between the inner ring 53 of the centrifugal fan and the outer ring 51 of the centrifugal fan forms an air inlet, A number of raised heat dissipation fins 411 are provided on the bottom plate 41 at the position below the centrifugal fan 5 , an air duct 412 is formed between two adjacent heat dissipation fins 411 , and the outer ring 51 of the centrifugal fan blocks the top of the air duct 412 , the outer ring 51 of the centrifugal fan, the flange 33 and a number of fan blades 52 form a centrifugal fan. When the outer rotor 3 rotates, the centrifugal fan 5 is driven to rotate, and the airflow enters the air duct 412 radially, and then flows into the gap 55. Under the action of the blades 52, the blades are thrown out radially to improve the heat dissipation inside the motor, and have an effective heat dissipation effect.

Several blades 59 are arranged on the inner side wall of the inner ring 53 of the centrifugal fan to improve the air flow inside the motor and increase the heat dissipation effect inside the motor.

The inner ring 53 of the centrifugal fan includes a top plate 531 and a first retaining ring 532 and a second retaining ring 533 protruding downward from the top plate 531. A second groove 534 is formed between the first retaining ring 532 and the second retaining ring 533. The bottom plate 41 An inner water retaining ring 43 and an outer water retaining ring 44 protrude upward, the inner water retaining ring 43 and the outer water retaining ring 44 are located on the periphery of the sleeve 42 , and a reservoir is formed between the inner water retaining ring 43 and the outer water retaining ring 44 . In the water tank 45, the top of the inner water retaining ring 43 is embedded in the second groove 534, and the second retaining ring 533 is inserted into the water storage tank 45, so that a labyrinth air outlet 400 is formed between the centrifugal fan and the bottom plate, and the waterproofness is good. Guaranteed product performance.

The end surface of the bottom plate 41 is provided with a plurality of second fan blade reinforcing ribs 46 to improve the heat dissipation effect inside the motor.

The outer water retaining ring 44 is provided with a plurality of notches 441 , and a shielding plate 47 is arranged on the outer side of the notches 441 to prevent external water droplets from entering the water storage tank 45 through the notches 441 .

The above embodiments are the preferred embodiments of the present invention, but the embodiments of the present invention are not limited thereto, and any other changes, modifications, substitutions, combinations, and simplifications that do not deviate from the spirit and principle of the present invention shall be The replacement modes that are equivalent are all included in the protection scope of the present invention.

Claims (10)

1. An outer rotor motor, comprising a rotating shaft (1), a stator assembly (2), an outer rotor (3) and a sleeve seat (4), the stator assembly (2) comprising a stator iron core (21), end insulation ( 22) and the coil winding (23), the sleeve seat (4) includes a base plate (41) and a sleeve (42) protruding upward from the middle of the base plate (41), and the outer rotor (3) includes a casing sleeve (31) ) and a plurality of permanent magnets (32) mounted on the inner wall surface of the casing sleeve (31), the casing sleeve (31) is provided with a cavity (310), and one end of the rotating shaft (1) extends from the sleeve (42) It is installed and connected with the casing sleeve (31), the stator assembly (2) is nested and installed on the outside of the sleeve (42), the outer rotor (3) is sleeved on the outside of the stator assembly (2), and the casing sleeve A flange (33) protrudes from the opening of (31), a centrifugal fan (5) is installed at the bottom of the flange (33), and an air outlet (400) is arranged between the centrifugal fan (5) and the bottom plate (41). , it is characterized in that: the top of the casing sleeve (31) is provided with a labyrinth air inlet (300), the labyrinth air inlet (300), the cavity (310) and the air outlet (400) are connected, and the air flows from the labyrinth The type air inlet (300) enters the motor and then is discharged from the air outlet (400). When the motor is running, the outer rotor (3) rotates and drives the centrifugal fan (5) to rotate together, and the centrifugal fan (5) displaces the air inside the motor. Pull out to make the air flow directionally inside the motor to dissipate heat. 2 . The outer rotor motor according to claim 1 , wherein the labyrinth air inlet ( 300 ) comprises an end cover ( 301 ) and a baffle cover ( 302 ), and the end cover ( 301 ) is mounted on the casing. 3 . On the top of the sleeve (31), the baffle cover (302) is mounted on the top surface (3014) of the end cover (301), and the end cover (301) is provided with a number of air inlet slots above the coil winding (23) A first baffle plate (3012) and a second baffle plate (3013) are respectively provided on the outside and inside of the air inlet slot (3011), and a first baffle plate (3014) is provided on the top surface (3014) of the end cover (301). Three baffles (3015), the third baffle (3015) is located on the periphery of the first baffle (3012) and forms a first groove (3016) with the first baffle (3012), the baffle cover (302) ) comprises a first annular plate (3021) and a second annular plate (3022), the top of the first annular plate (3021) and the second annular plate (3022) are connected with a connecting plate (3023), the baffle cover (302) ) is installed on the end cover (301) when the second baffle plate (3013) is sleeved with the second annular plate (3022), the first annular plate (3021) is inserted into the first groove (3016) to form a labyrinth The air passage (3017), the labyrinth air inlet passage (3017) is communicated with the air inlet slot (3011), and the connecting plate (3023) covers the air inlet slot (3011). 3. The outer rotor motor according to claim 2, wherein the height H1 of the third baffle plate (3015) is lower than the height H2 of the first baffle plate (3012). 4. An outer rotor motor according to claim 2 or 3, characterized in that: the baffle cover (302) is locked on the end cover (301) by screws, and the bottom end of the second annular plate (3022) A mounting plate (3024) protrudes inwardly, the mounting plate (3024) of the baffle cover (302) is provided with a plurality of first mounting holes (3025), and the end cover (301) is provided with the mounting plate (3024) Several first mounting holes (3025) corresponding to several second mounting holes (3018), screw the screws into the first mounting holes (3025) and the second mounting holes (3018) to lock the baffle cover (302) Tightly on end cap (301). 5 . The outer rotor motor according to claim 4 , wherein a plurality of first fan blade reinforcing ribs ( 6 ) are provided on the bottom surface ( 3019 ) of the end cover ( 301 ). 6 . 6. An outer rotor motor according to claim 4, characterized in that: the centrifugal fan (5) comprises a centrifugal fan outer ring (51) located at the bottom, and the centrifugal fan outer ring (51) is oriented toward the upper A number of fan blades (52) are provided, and the inner side of the centrifugal fan outer ring (51) is provided with a centrifugal fan inner ring (53), the diameter of the centrifugal fan inner ring (53) is smaller than the diameter of the centrifugal fan outer ring (51), and the outer The inner side of the ring (51) is connected to the inner ring (53) of the centrifugal fan through several connection points, and the gap (55) between the inner ring (53) of the centrifugal fan and the outer ring (51) of the centrifugal fan forms an air inlet, and the air inlet is formed at the inner ring (53) of the centrifugal fan. A number of raised cooling fins (411) are arranged on the bottom plate (41) at the position below the ), and air ducts (412) are formed between two adjacent cooling fins (411), and the outer ring of the centrifugal fan (51) Covering the top of the air duct (412), the outer ring (51) of the centrifugal fan, the flange (33), and a number of fan blades (52) form a centrifugal fan. When the outer rotor (3) rotates, the centrifugal fan (5) is driven. Rotating, the air flow enters the air duct (412) radially, and then flows into the gap (55), and is thrown out radially outward under the action of several fan blades (52). 7. An outer rotor motor according to claim 6, characterized in that a plurality of blades (59) are arranged on the inner side wall of the inner ring (53) of the centrifugal fan. 8. An outer rotor motor according to claim 7, characterized in that: the inner ring (53) of the centrifugal fan comprises a top plate (531) and a first retaining ring (532) and a first retaining ring (532) protruding downward from the top plate (531). Second retaining ring (533), a second groove (534) is formed between the first retaining ring (532) and the second retaining ring (533), and the bottom plate (41) protrudes upward with an inner water retaining ring (43) and The outer water retaining ring (44), the inner water retaining ring (43) and the outer water retaining ring (44) are located on the periphery of the sleeve (42), and the inner water retaining ring (43) and the outer water retaining ring (44) are formed between the inner water retaining ring (43) and the outer water retaining ring (44). In the water storage tank (45), the top of the inner water retaining ring (43) is embedded into the second groove (534), and the second retaining ring (533) is inserted into the water storage tank (45), so that the centrifugal fan (5) is connected to the bottom plate. A labyrinth air outlet (400) is formed between (41). 9 . The outer rotor motor according to claim 8 , wherein a plurality of second fan blade reinforcing ribs ( 46 ) are provided on the end surface of the bottom plate ( 41 ). 10 . 10. An outer rotor motor according to claim 9, characterized in that: the outer water retaining ring (44) is provided with a plurality of notches (441), and a shielding plate (47) is provided on the outer side of the notches (441).

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