CN217642908U - a motor - Google Patents

Abstract

The utility model relates to the technical field of electric machines, a motor is provided, include: a rotating shaft extending along a central axis; a rotor supported by the rotating shaft; a stator disposed opposite to the rotor; a housing for accommodating the stator and the rotor; a first bearing for supporting the rotating shaft and enabling the rotating shaft to rotate; a bearing support portion that holds the first bearing; the rotor includes: the stator is provided with a stator iron core; the axial dimension of the rotor magnet is larger than that of the rotor core, and a steel plate is arranged between the rotor core and the rotor magnet in the circumferential direction. The utility model discloses can reduce the magnetic resistance, increase the magnetic flux, realize reducing the magnetic leakage of rotor core external diameter tip, increase the magnetic linkage towards stator core to effectively utilize rotor magnet's magnetic flux, improve the output of motor under equal size.

Description

a motor

technical field

The utility model relates to the technical field of motors, in particular to a motor.

Background technique

At present, in the existing design, the output performance of the motor is mainly improved by the following two methods:

The first method is that the height of the rotor magnet is greater than the height of the rotor iron core; the second method is that the heights of the rotor magnet and the rotor iron core are both greater than the height of the stator iron core.

For the first method, the excess part of the rotor magnet is exposed in the air, the reluctance in the air is more than 1000 times that of the electromagnetic steel plate, and the magnetic flux is reduced, so the magnetic force of the magnet cannot be effectively used, and the output performance is reduced;

For the second method, there are mainly more magnetic flux leakage at the outer diameter end of the rotor iron core and an increase in the thickness of the rotor iron core, which increases the cost.

Utility model content

The utility model mainly solves the technical problems that the excess part of the rotor magnet is exposed in the air in the prior art, resulting in lower output performance and more magnetic flux leakage at the outer diameter end of the rotor iron core, and proposes a motor to effectively utilize the magnet. The purpose of increasing the motor output under the same size is the magnetic flux.

The utility model provides a motor, comprising: a rotating shaft extending along a central axis; a rotor supported by the rotating shaft; a stator arranged opposite to the rotor; a casing for accommodating the stator and the rotor; a first bearing that rotates a rotating shaft; a bearing support part that holds the first bearing; the rotor includes a rotor iron core and a rotor magnet, the stator has a stator iron core; the rotor magnet The axial dimension is larger than the axial dimension of the rotor iron core, and a steel plate is arranged between the rotor iron core and the circumferential direction of the rotor magnet.

Further, the axial dimension of the stator iron core is larger than the axial dimension of the rotor iron core.

Further, the two ends of the rotor core close to the rotor magnets are not punched, and the remaining parts are lifted up to configure the steel plates.

Further, the radial dimension of the rotor iron core where the rotor magnets are arranged is the same as the axial dimension of the rotor magnet.

Further, it also includes: a second bearing that cooperates with the first bearing to support the rotation of the rotating shaft; the rotor is located between the first bearing and the second bearing.

Further, the first bearing and the second bearing are accommodated in the casing; the diameter of the casing accommodating the second bearing part is smaller than the diameter of the stator and the rotor part.

Further, the opposite sides of the casing are respectively provided with connecting parts; the casing is also provided with a junction box.

The utility model provides a motor, by arranging a steel plate on the side of the rotor magnet, reducing the magnetic resistance, increasing the magnetic flux, reducing the magnetic flux leakage at the outer diameter end of the rotor core, and increasing the flux linkage towards the stator core, thereby effectively utilizing the rotor The magnetic flux of the magnet increases the output of the motor under the same size.

Description of drawings

1 is a schematic diagram of the internal structure of a motor casing provided by the present invention;

Fig. 2 is the structural representation of the motor casing provided by the present invention;

3 is a schematic structural diagram of the rotor and the stator of the motor provided by the present invention;

4 is a schematic structural diagram of a steel plate on the side of the rotor magnet of the motor provided by the present utility model;

FIG. 5 is a schematic structural diagram of a connection part and a junction box provided in the motor casing provided by the present invention.

Reference numerals: 1. Rotating shaft; 2. First bearing; 3. Bearing support; 4. Rotor; 5. Housing; 6. Stator; 7. Second bearing; 8. Steel plate; 41. Rotor core; 42 , rotor magnet; 51, connecting part; 52, junction box; 61, stator core.

Detailed ways

In order to make the technical problems solved by the present utility model, the technical solutions adopted and the technical effects achieved more clearly, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention, but not to limit the present invention. In addition, it should be noted that, for the convenience of description, the accompanying drawings only show the part but not the whole content related to the present invention.

As shown in FIG. 1 , the motor provided by the embodiment of the present invention includes: a rotating shaft 1 extending along the central axis; a rotor 4 supported by the rotating shaft 1; a stator 6 arranged opposite to the rotor 4; The casing 5 that houses the stator 6 and the rotor 4 is usually made of resin material; the first bearing 2 that supports the rotating shaft 1 and enables the rotating shaft to rotate; the bearing support part 3 that holds the first bearing 2; as shown in FIG. 3 , The rotor 4 includes: a rotor iron core 41 and a rotor magnet 42 ; the stator 6 has a stator iron core 61 , and the stator iron core 61 is provided with insulating parts up and down; the axial dimension of the rotor magnet 42 is larger than that of the rotor iron core 41 . 4, a steel plate 8 is arranged between the rotor core 41 and the rotor magnet 42 in the circumferential direction. By arranging the steel plate on the side of the rotor magnet 42, the magnetic resistance can be reduced and the magnetic flux can be increased. decrease, the flux linkage toward the stator core 61 is increased. Through the above two methods, the magnetic flux of the rotor magnet 42 can be effectively used, and the motor output can be improved with the same magnitude.

In this embodiment, as shown in FIG. 3 , the axial dimension of the stator iron core 61 is larger than the axial dimension of the rotor iron core 41 . Under the same size, the output characteristics of the motor are improved, the number of punched pieces of the rotor iron core 41 is reduced, and the production cost of the motor is reduced.

In this embodiment, as shown in FIG. 4 , the two ends of the rotor core 41 close to the rotor magnets 42 are not punched, and the remaining parts are lifted up to arrange the steel plates 8 to facilitate the arrangement of the steel plates.

In this embodiment, as shown in FIG. 4 , the radial dimension of the rotor core 41 where the rotor magnets 42 are arranged is the same as the axial dimension of the rotor magnet 42 . Using the waste material of the rotor iron core as a steel plate can reduce the production cost of the motor and save the consumption of resources.

This embodiment, as shown in FIG. 1 , further includes: a second bearing 7 that cooperates with the first bearing 2 to support the rotation of the rotating shaft 1 ; the rotor 4 is located between the first bearing 2 and the second bearing 7 . The double bearing can prevent the radial deflection of the rotor 4 and the stator 6, which affects the output of the motor.

In this embodiment, as shown in FIG. 2 , the first bearing 2 and the second bearing 7 are accommodated in the casing 5 ; the diameter of the part of the casing 5 accommodating the second bearing 7 is smaller than that of the part accommodating the stator 6 and the rotor 4 .

In this embodiment, as shown in FIG. 5 , the opposite sides of the casing 5 are respectively provided with connecting parts 51 for connecting external devices; , so as to facilitate the wiring of external devices.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present utility model, but not to limit them; although the present utility model has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that : It modifies the technical solutions recorded in the foregoing embodiments, or performs equivalent replacements to some or all of the technical features thereof, and does not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the various embodiments of the present invention.

Claims (7)

1. A motor comprising: a rotating shaft (1) extending along the central axis; A rotor (4) supported by the rotating shaft (1); a stator (6) arranged opposite to the rotor (4); a casing (5) for accommodating the stator (6) and the rotor (4); a first bearing (2) that supports the rotating shaft (1) and enables the rotating shaft to rotate; a bearing support (3) holding the first bearing (2); It is characterized in that, The rotor (4) includes: a rotor iron core (41), a rotor magnet (42), and the stator (6) has a stator iron core (61); The axial dimension of the rotor magnet (42) is larger than the axial dimension of the rotor iron core (41), and a steel plate (8) is arranged between the rotor iron core (41) and the circumferential direction of the rotor magnet (42). ). 2 . The motor according to claim 1 , wherein the axial dimension of the stator iron core ( 61 ) is larger than the axial dimension of the rotor iron core ( 41 ). 3 . 3. The motor according to claim 1, characterized in that, the two ends of the rotor core (41) close to the rotor magnets (42) are not punched, and the rest of the iron core (41) is lifted up to configure the steel plate (8). 4 . The motor according to claim 1 , wherein the radial dimension of the rotor iron core ( 41 ) where the rotor magnet ( 42 ) is arranged is the same as the axial dimension of the rotor magnet ( 42 ). 5 . 5 . The motor according to claim 1 , further comprising: a second bearing ( 7 ) that cooperates with the first bearing ( 2 ) to support the rotation of the rotating shaft ( 1 ); the rotor ( 4 ) between the first bearing (2) and the second bearing (7). 6. The motor according to claim 5, characterized in that, the first bearing (2) and the second bearing (7) are accommodated in the casing (5); the casing (5) accommodates the The diameter of the second bearing (7) part is smaller than the diameter of the part housing the stator (6) and the rotor (4). 7. The motor according to claim 6, characterized in that, connecting portions (51) are respectively provided on opposite sides of the housing (5); and a junction box (52) is also provided on the housing (5) .

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