Motor structure

Abstract

The utility model discloses a motor structure which comprises a shell, a rotor and a cover plate, a first ventilation opening and a plurality of first hollowed-out parts are arranged on the shell in a penetrating mode, a first bearing is arranged in the first ventilation opening, a coil framework is arranged in the shell, a plurality of stators are arranged on the outer side of the coil framework, a mounting groove is formed in the coil framework in a penetrating mode, and an output shaft is arranged on the rotor in a penetrating mode. The rotor is arranged in the mounting groove, one end of the output shaft is connected with the first bearing in a matched mode, the cover plate covers the shell, a first support is arranged in the cover plate, a plurality of second hollowed-out parts penetrate through the first support, a second ventilation opening penetrates through the center of the first support, a second bearing is arranged in the second ventilation opening, and a fan impeller is connected to the second bearing in a matched mode. The other end of the output shaft is fixedly connected with the fan impeller, a plurality of air channels are formed in the first support, and a plurality of third hollowed-out parts are formed in the cover plate in a penetrating mode. The utility model provides a motor structure, a fan impeller is installed on a cover plate, and the fan impeller and a rotor rotate synchronously to dissipate heat of a brushless motor.

Description

Technical Field

[0001] This utility model relates to the field of motor heat dissipation, and in particular to a motor structure. Background Technology

[0002] The main body of an existing brushless motor consists of a stator and a rotor. The rotor of a brushless motor can be configured as an external rotor or an internal rotor. During operation, brushless motors require effective heat dissipation to ensure they are in good working condition.

[0003] During the use of brushless motors with internal rotors, the brushless motor itself generates a lot of heat. The rotor and bearings located in the center cannot properly release their own working heat. When the brushless motor runs for a long time, it is easy to cause damage to the brushless motor. Utility Model Content

[0004] The purpose of this utility model is to provide a motor structure in which a fan impeller is installed on the cover plate, and the fan impeller rotates synchronously with the rotor to dissipate heat from the brushless motor.

[0005] The technical solution adopted in the motor structure disclosed in this utility model is:

[0006] The device includes a housing, a rotor, and a cover plate. The housing has a first vent and multiple first perforations. A first bearing is installed inside the first vent. A coil frame is installed inside the housing. Multiple stators are installed on the outer side of the coil frame. A mounting groove is installed through the coil frame. An output shaft is installed through the rotor and placed in the mounting groove. One end of the output shaft is connected to the first bearing. The cover plate covers the housing and has a first bracket inside. The first bracket has multiple second perforations. A second vent is installed through the center of the first bracket. A second bearing is installed inside the second vent. A fan impeller is connected to the second bearing and is located between the first bracket and the cover plate. The other end of the output shaft is fixedly connected to the fan impeller. The first bracket has multiple air ducts. One end of each air duct is close to the rotor, and the other end is close to the fan impeller. The cover plate has multiple third perforations.

[0007] As a preferred embodiment, the fan impeller has a threaded hole, and a grommet screw is connected to the threaded hole, with the grommet screw contacting the outer side of the output shaft.

[0008] As a preferred embodiment, the first bracket extends with a plurality of spaced-apart limiting blocks, the limiting blocks being located between two adjacent second hollows, the limiting blocks being close to the edge of the first bracket, and the cover plate having a plurality of spaced-apart limiting grooves, the limiting blocks being engaged in adjacent limiting grooves.

[0009] As a preferred embodiment, a sleeve is fitted onto the cover plate, and a pipe is connected to the sleeve, with a filter screen covering the end of the pipe.

[0010] As a preferred embodiment, a second bracket is fixedly connected inside the sleeve. The second bracket has multiple fourth hollow holes through it. A mounting hole is passed through the center of the second bracket. Two protruding clips extend from the inner wall of the mounting hole. A mounting post extends from the outer side of the cover plate. Two slots are provided on the mounting post. The protruding clips are engaged in the slots.

[0011] As a preferred embodiment, the cover plate is provided with multiple limiting holes, and the bracket extends with multiple limiting protrusions, which are engaged in adjacent limiting holes.

[0012] The beneficial effects of the motor structure disclosed in this utility model are:

[0013] When the motor is powered on, the rotor drives the fan impeller to rotate through the other end of the output shaft. The fan impeller draws air from the outside of the cover plate, and the air enters the cover plate through the third perforation. The air first exchanges heat with the second bearing, thereby reducing the operating temperature of the second bearing. Part of the air is blown towards the rotor under the guidance of the air duct. When the air passes through the mounting slot, it exchanges heat with the rotor, thereby reducing the operating temperature of the rotor. The air that exchanges heat with the second bearing passes through the second vent and the mounting slot in sequence. The air that passes through the mounting slot exchanges heat with the first bearing, thereby reducing the operating temperature of the first bearing. The air carrying the heat from the first bearing, the second bearing, and the rotor is discharged from the outside of the motor through the first vent. Another part of the air passes through the coil frame inside the second perforated guide shell. When the air passes through the coil frame, it exchanges heat with the stator on the coil frame, thereby reducing the operating temperature of the stator. The air carrying the heat from the stator is discharged from the outside of the motor through the first perforation. This achieves the simultaneous cooling of the stator and the rotor, the first bearing, and the second bearing located at the center of the motor, using the air duct, the second vent, and the first vent, enabling the brushless motor to operate safely for a long time. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of a motor according to the present invention.

[0015] Figure 2 This is an installation diagram of a motor structure according to the present invention.

[0016] Figure 3 This is a cross-sectional view of the housing and rotor of an electric motor structure according to this utility model.

[0017] Figure 4 This is a cross-sectional view of the cover plate of a motor structure according to this utility model.

[0018] Figure 5This is an installation diagram of the first bracket and fan impeller of a motor structure according to this utility model.

[0019] Figure 6 This is a schematic diagram of the sleeve, pipe and filter screen of a motor structure according to this utility model.

[0020] Figure 7 This is a cross-sectional view of the sleeve of a motor structure according to this utility model. Detailed Implementation

[0021] The present invention will be further described and illustrated below with reference to specific embodiments and the accompanying drawings:

[0022] Please refer to Figures 1-3 .

[0023] The present invention discloses a motor structure, including a housing 1, a rotor 2, and a cover plate 3;

[0024] One end of the outer casing 1 has a plurality of spaced first perforations 11 that penetrate the outer casing 1. One end of the outer casing 1 has a first vent 12 that penetrates the outer casing 1 and is located at the center of the outer casing 1. The plurality of first perforations 11 are arranged around the first vent 12. The outer ring of the first bearing 121 is installed inside the first vent 12 and contacts the inner wall of the first vent 12. The outer casing 1 has a coil frame 13. The outer side of the coil frame 13 has a plurality of spaced stators 131. The center of the coil frame 13 has a mounting groove that penetrates the center of the coil frame 13 and is close to the first bearing 121. The plurality of stators 131 are arranged around the mounting groove.

[0025] Please refer to Figure 3 .

[0026] An output shaft 21 passes through the rotor 2, with both ends of the output shaft 21 extending out of the outer side of the rotor 2. The rotor 2 is placed in the mounting groove, with a gap between the outer side of the rotor 2 and the inner wall of the mounting groove. The outer side of one end of the output shaft 21 is connected to the inner ring of the first bearing 121. One end of the output shaft 21 extends out of the outer side of the outer casing 1 from the first vent 12.

[0027] Please refer to Figures 2-5 .

[0028] A cover plate 3 is placed over the other end of the outer shell 1. A first support 4 is provided inside the cover plate 3. The first support 4 is located between the outer shell 1 and the cover plate 3. In this embodiment, the outer contour of the first support 4 is the same as the inner contour of the cover plate 3. A plurality of second cutouts 41 are passed through the first support 4. In this embodiment, three second cutouts 41 are preferred. A second ventilation port 42 is passed through the center of the first support 4. The three second cutouts 41 are arranged in a ring around the second ventilation port 42. A second bearing 421 is provided inside the second ventilation port 42. The outer ring of the second bearing 421 contacts the inner wall of the second ventilation port 42. A fan impeller 43 is connected to the second bearing 421. The fan impeller 43 is located between the first support 4 and the cover plate 3.

[0029] Furthermore, a connecting post extends from the center of the impeller 43. The outer side of the connecting post is connected to the inner ring of the second bearing 421. A through hole is provided in the center of the connecting post, which passes through the connecting post and the impeller 43. A threaded hole is provided on the impeller 43, which communicates with the through hole. An organic screw 431 is connected in the threaded hole.

[0030] Furthermore, the other end of the output shaft 21 passes through the through hole, and the ferrule 431 contacts the outside of the output shaft 21. The fan impeller 43 is fixedly connected to the other end of the output shaft 21 by the ferrule 431.

[0031] The first support 4 is provided with multiple air ducts 411. In this embodiment, three air ducts 411 are preferred. The three air ducts 411 correspond to three second hollows 41. The air ducts 411 are located in the second hollows 41. One end of the air duct 411 is close to the rotor 2, and the other end of the air duct 411 is close to the fan impeller 43.

[0032] Multiple spaced limiting blocks 44 extend from the first support 4. In this embodiment, three limiting blocks 44 are preferred. The three limiting blocks 44 correspond to three second hollows 41. The limiting blocks 44 are located between two adjacent second hollows 41 and are close to the edge of the first support 4. Multiple third hollows 31 are penetrated through the cover plate 3. In this embodiment, three third hollows 31 are preferred. The three third hollows 31 correspond to three second hollows 41. Multiple spaced limiting grooves are opened in the cover plate 3. The limiting grooves are located between two adjacent third hollows 31. The limiting blocks 44 of the first support 4 are engaged in the adjacent limiting grooves, so that the second hollows 41 of the first support 4 can correspond to the third hollows 31 and can restrict the rotation of the first support 4 within the cover plate 3.

[0033] When an external power source provides power to the motor, the rotor 2 drives the impeller 43 to rotate synchronously. The impeller 43 draws air from the outside of the cover plate 3 and draws the air into the cover plate 3 through the third perforation 31. The air entering the cover plate 3 first exchanges heat with the second bearing 421, thereby reducing the operating temperature of the second bearing 421. The air passes through the second bearing 421 and the second vent 42 in sequence and then approaches the rotor 2. A portion of the air in the cover plate 3 approaches the rotor 2 through the air duct 411. When this portion of the air passes through the mounting slot, it exchanges heat with the rotor 2, reducing the operating temperature of the rotor 2 located at the center of the motor. The air passing through the mounting slot finally comes into contact with the first bearing 121. The operating temperature of the first bearing 121 is higher than that of the air. After the air carries away the operating heat of the first bearing 121, it is discharged from the first vent 12, thus cooling the rotor 2, the first bearing 121, and the second bearing 421 located at the center of the motor.

[0034] Another portion of the air passes through the second perforation 41 and enters the outer casing 1. When the air passes through the coil frame 13, it exchanges heat with the stator 131. After carrying away the operating heat of the stator 131, the air is discharged from the first perforation 11, thereby cooling the stator 131.

[0035] Please refer to Figure 6 and Figure 7 .

[0036] A sleeve 5 is fitted onto the cover plate 3. A second bracket 51 is fixedly connected inside the sleeve 5. The second bracket 51 has multiple fourth hollows. In this embodiment, three fourth hollows are preferred, and the three fourth hollows correspond to three third hollows 31. A mounting hole is passed through the center of the second bracket 51. The three fourth hollows are arranged around the mounting hole at intervals. Two protruding clips 511 extend from the inner wall of the mounting hole. A mounting post extends from the outer side of the cover plate 3. Two slots 32 are provided on the mounting post. The protruding clips 511 are inserted into the slots 32. The sleeve 5 is engaged with the slots 32 on the cover plate 3 by the protruding clips 511, so that the sleeve 5 can be firmly fitted onto the cover plate 3.

[0037] Furthermore, the cover plate 3 is provided with multiple limiting holes 33. In this embodiment, three limiting holes 33 are preferably provided. The limiting holes 33 are located between two adjacent third hollows 31. Multiple limiting protrusions 512 extend from the bracket. In this embodiment, three limiting protrusions 512 are preferably provided. The limiting protrusions 512 are located between two adjacent fourth hollows. The limiting protrusions 512 are inserted into the adjacent limiting holes 33, so that the fourth hollow of the second bracket 51 can correspond to the third hollow 31, and can improve the firmness of the sleeve 5 on the cover plate 3.

[0038] Furthermore, a pipe 52 is connected to the sleeve 5, and a filter screen 521 is covered at the end of the pipe 52. The filter screen 521 is used to filter dust in the air entering the pipe 52, thereby purifying the air sucked in by the fan impeller 43 and preventing dust in the outside air from entering the motor.

[0039] This utility model provides a motor structure. When the motor is powered on, the rotor drives the fan impeller to rotate through the other end of the output shaft. The fan impeller draws air from the outside of the cover plate, and the air enters the cover plate through the third perforation. The air first exchanges heat with the second bearing, thereby reducing the operating temperature of the second bearing. Part of the air is blown towards the rotor under the guidance of the air duct. When the air passes through the mounting slot, it exchanges heat with the rotor, thereby reducing the operating temperature of the rotor. The air that exchanges heat with the second bearing passes through the second vent and the mounting slot in sequence. The air that passes through the mounting slot exchanges heat with the first bearing, thereby reducing the operating temperature of the first bearing. The air carrying the heat from the first bearing, the second bearing, and the rotor is discharged from the outside of the motor through the first vent. Another part of the air passes through the coil frame inside the second perforated guide shell. When the air passes through the coil frame, it exchanges heat with the stator on the coil frame, thereby reducing the operating temperature of the stator. The air carrying the heat from the stator is discharged from the outside of the motor through the first perforation. This achieves the simultaneous cooling of the stator and the rotor, the first bearing, and the second bearing located at the center of the motor through the air duct, the second vent, and the first vent, enabling the brushless motor to operate safely for a long time.

[0040] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit the scope of protection of this utility model. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the essence and scope of the technical solutions of this utility model.

Claims

1. An electric machine structure, characterized by It comprises a shell, a rotor and a cover plate. The shell is provided with a first air vent and a plurality of first hollows, the first air vent is provided with a first bearing, the shell is provided with a coil framework, the coil framework is provided with a plurality of stators outside, the coil framework is provided with a mounting slot; The rotor is provided with an output shaft, the rotor is arranged in the mounting slot, and one end of the output shaft is connected with the first bearing in a matched mode; The cover plate is arranged on the shell, the cover plate is provided with a first support, the first support is provided with a plurality of second hollows, the center of the first support is provided with a second air vent, the second air vent is provided with a second bearing, the second bearing is provided with a fan wheel in a matched mode, the fan wheel is located between the first support and the cover plate, the other end of the output shaft is fixedly connected with the fan wheel, the first support is provided with a plurality of air ducts, one end of the air duct is close to the rotor, the other end of the air duct is close to the fan wheel, and the cover plate is provided with a plurality of third hollows.

2. An electrical machine structure as claimed in claim 1, characterised in that, The fan wheel is provided with a threaded hole, the threaded hole is provided with a machine screw in a matched mode, and the machine screw is in contact with the outside of the output shaft.

3. An electrical machine structure as claimed in claim 2, characterised in that, The first support is provided with a plurality of limiting blocks arranged at intervals, the limiting blocks are located between two adjacent second hollows, the limiting blocks are close to the edges of the first support, the cover plate is provided with a plurality of limiting grooves arranged at intervals, and the limiting blocks are clamped into adjacent limiting grooves.

4. An electrical machine structure as claimed in claim 3, characterised in that, The cover plate is provided with a sleeve, the sleeve is provided with a pipeline in communication, and the pipeline is covered with a filter screen at the tail end.

5. An electrical machine structure as claimed in claim 4, characterised in that, The sleeve is fixedly connected with a second support, the second support is provided with a plurality of fourth hollows, the center of the second support is provided with a mounting hole, the inner wall of the mounting hole is extended with two convex clamps, the outer side of the cover plate is extended with a mounting column, the mounting column is provided with two clamping grooves, and the convex clamps are clamped into the clamping grooves.

6. An electrical machine structure as claimed in claim 5, characterised in that, The cover plate is provided with a plurality of limiting holes, and the support is provided with a plurality of limiting protrusions, the limiting protrusions are clamped into adjacent limiting holes.

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