CN201160240Y - A motor rotor structure - Google Patents

Abstract

The rotor structure of the motor comprises a rotating shaft (7) and a magnetic ring body, wherein the magnetic ring body is a hollow cylinder structure surrounded by an outer edge (1) and an inner edge (2), the outer edge (1) of the magnetic ring body is provided with a plurality of bulged outer bosses (3) or the outer edge (1) of the magnetic ring body is provided with a plurality of sunken grooves (4). The utility model discloses the wall thickness that makes the magnetic ring body also follows the regular size change of sine wave, suits with the magnetic field change of rotor outside, reaches the effect that operates steadily, the noise is little, operating efficiency is high.

Description

A motor rotor structure

Technical field:

The utility model relates to a rotor structure of a motor.

Background technique:

The rotor of a traditional plastic-encapsulated DC brushless motor includes a rotating shaft and a magnetic ring, and most of the rotating shaft and the magnetic ring are connected by a rotor core. As shown in Figure 1 and Figure 2, the magnetic ring body is a hollow cylindrical structure surrounded by the outer edge M and the inner edge N. The outer edge M and the inner edge N are both circular, so the wall thickness of the magnetic ring body is Everywhere is equal. This structure has the following disadvantages: because the magnetic field outside the rotor changes according to the law of sine waves, this kind of magnetic ring body of equal thickness cannot adapt to the change of the external magnetic field environment, resulting in problems such as unstable operation, high noise and low efficiency.

Invention content:

The purpose of the utility model is to provide a rotor structure of a motor with stable operation, low noise and high operation efficiency.

The technical scheme of the utility model is achieved in that:

A rotor structure of a motor, including a rotating shaft and a magnetic ring body. The magnetic ring body is a hollow cylindrical structure surrounded by an outer edge and an inner edge. The outer edge of the magnetic ring body is provided with a plurality of bulging outer rings. A plurality of concave grooves are arranged on the boss or the outer edge of the magnetic ring body. The utility model makes the wall thickness of the magnetic ring body also change with the regular size of the sine wave, adapts to the change of the magnetic field outside the rotor, and achieves the effects of stable operation, low noise and high efficiency.

The above-mentioned outer boss is arc-shaped, and the arc-shaped outer boss is high in the middle and low on both sides. It conforms to the regular change of sine wave and is easy to process. The arc may refer to a circular arc or an elliptical arc.

The above-mentioned outer bosses are evenly distributed along the circumference, and the number of outer bosses is at least two. It is easy to process and more in line with the regular changes of sine waves. The inner edge is circular, and the magnetic ring body is installed and connected with the rotating shaft through the rotor iron core.

The above-mentioned groove is arc-shaped, and the arc-shaped groove is low in the middle and high on both sides, conforms to the regular change of sine wave, and is easy to process. The arc may refer to a circular arc or an elliptical arc.

The above-mentioned grooves are evenly distributed along the circumference, and the number of grooves is at least two. The structure is simple and the manufacture is convenient. The inner edge is circular, and the magnetic ring body is connected with the rotating shaft by injection molding.

The inner edge is provided with a plurality of bulging inner bosses. Simple structure, convenient connection and assembly.

The radial position of the above-mentioned inner boss on the inner edge corresponds to the radial position of the groove or the outer boss on the outer edge.

Description of drawings:

Below in conjunction with accompanying drawing and embodiment the utility model is further described.

Fig. 1 is a structural diagram of a magnetic ring body on a conventional rotor;

Fig. 2 is A-A sectional view of Fig. 1;

Fig. 3 is a schematic diagram of the first implementation structure of the magnetic ring body of the present utility model;

Fig. 4 is a perspective view of the first implementation structure of the magnetic ring body of the present invention;

Fig. 5 is a schematic diagram of the second embodiment of the utility model;

Fig. 6 is a perspective view of a second implementation structure of the present utility model;

Fig. 7 is the schematic diagram of the third implementation structure of the utility model;

Fig. 8 is a perspective view of a third implementation structure of the present utility model;

Fig. 9 is a schematic diagram of the fourth implementation structure of the utility model;

Fig. 10 is a perspective view of a fourth implementation structure of the present utility model;

Fig. 11 is a schematic diagram of the fifth implementation structure of the utility model;

Fig. 12 is a perspective view of a fifth implementation structure of the present utility model;

Fig. 13 is a schematic diagram of the sixth implementation structure of the utility model;

Fig. 14 is a schematic diagram of the seventh implementation structure of the utility model;

Fig. 15 is a schematic diagram of the eighth implementation structure of the utility model;

Fig. 16 is a perspective view of the eighth implementation structure of the utility model

Detailed ways:

Embodiment 1: as shown in Fig. 3, Fig. 4, comprise rotating shaft 7 and magnetic ring body in the embodiment 1 of the present utility model, magnetic ring body is the hollow cylinder structure that is surrounded by outer edge 1 and inner edge 2, so The outer edge 1 of the magnetic ring body is provided with a plurality of bulging outer bosses 3, the outer bosses 3 are arc-shaped, and the arc-shaped outer bosses 3 are high in the middle and low on both sides. The outer bosses 3 are evenly distributed along the circumference, and the number of outer bosses 3 is at least two. The inner edge 2 is circular, and the magnetic ring body is installed and connected with the rotating shaft 7 through the rotor iron core 5 .

Embodiment 2: as shown in Fig. 5, Fig. 6, comprise rotating shaft 7 and magnetic ring body in the embodiment 2 of the present utility model, magnetic ring body is the hollow cylinder structure that is surrounded by outer edge 1 and inner edge 2, so The outer edge 1 of the magnetic ring body is provided with a plurality of concave grooves 4, the grooves 4 are arc-shaped, and the arc-shaped grooves 4 are low in the middle and high on both sides. The grooves 4 are evenly distributed along the circumference, and the number of the grooves 4 is at least two. The inner edge 2 is circular, and the magnetic ring body is connected with the rotating shaft 7 by injection molding. That is, injection molding is performed using the gap between the magnetic ring body and the rotating shaft 7 .

Embodiment 3: As shown in FIG. 7 and FIG. 8 , compared with Embodiment 2, the inner edge 2 is provided with a plurality of bulging inner bosses 6 . The inner boss 6 on the inner edge 2 corresponds to the radial position of the groove 4 on the outer edge 1. In the figure, the inner boss 6 is aligned with the groove 4 on the outer edge 1 in the radial direction. The magnetic ring body is integrally connected with the rotating shaft 7 by injection molding.

Embodiment 4: As shown in Figure 9 and Figure 10, compared with Embodiment 1, the inner edge 2 is provided with a plurality of bulging inner bosses 6, and the inner bosses 6 on the inner edge 2 are connected with the upper outer edge of the outer edge 1. The radial positions of the bosses 3 are corresponding. In the figure, the inner bosses 6 and the outer bosses 3 are staggered, and the inner bosses 6 straddle two adjacent outer bosses 3 .

Embodiment 5: As shown in Figure 11 and Figure 12, compared with Embodiment 1, the outer edge 1 of Embodiment 5 of the present utility model is circular, and the inner edge 2 is provided with a plurality of bulging inner bosses 6 . The inner boss 6 is arc-shaped.

Embodiment 6: As shown in FIG. 13 , compared with Embodiment 5, in Embodiment 5 of the present utility model, the outer edge 1 is circular, and the inner edge 2 is provided with a plurality of bulging inner bosses 6 . The inner boss 6 is trapezoidal.

Embodiment 7: As shown in FIG. 14 , compared with Embodiment 6, in Embodiment 5 of the present utility model, the outer edge 1 is circular, and the inner edge 2 is provided with a plurality of bulging inner bosses 6 . The inner boss 6 is triangular.

Embodiment 8: As shown in Figure 15 and Figure 16, compared with Embodiment 5, the outer edge 1 of Embodiment 8 of the present utility model is circular, and the inner edge 2 is provided with a plurality of bulging trapezoidal inner bosses 6 . The inner edge 2 is gear-shaped.

Claims (9)

1, a kind of rotor structure of motor, comprise rotating shaft (7) and magnetic ring body, magnetic ring body is the hollow cylinder structure that is surrounded by outer rim (1) and inner edge (2), it is characterized in that: the outer rim (1) that the outer rim of described magnetic ring body (1) is provided with a plurality of outer lug boss of heaving (3) or described magnetic ring body is provided with the groove (4) of a plurality of depressions.

2, the rotor structure of a kind of motor according to claim 1 is characterized in that: described outer lug boss (3) is an arc, and described arc outer lug boss (3) is high in the middle of being, both sides are low.

3, the rotor structure of a kind of motor according to claim 1 and 2 is characterized in that: described outer lug boss (3) is evenly to distribute along circumference, and the number of outer lug boss (3) is 2 at least.

4, the rotor structure of a kind of motor according to claim 1 and 2 is characterized in that: described inner edge (2) is circular, and magnetic ring body is to install with rotating shaft (7) by rotor core (5) to couple together.

5, the rotor structure of a kind of motor according to claim 1 is characterized in that: described groove (4) is an arc, and described arc groove (4) is low in the middle of being, the both sides height.

6, a kind of rotor structure of motor according to claim 1 or 5, it is characterized in that: described groove (4) is evenly to distribute along circumference, the number of groove (4) is 2 at least.

7, a kind of rotor structure of motor according to claim 1 or 5 is characterized in that: described inner edge (2) is circular, and magnetic ring body is to install with rotating shaft (7) injection moulding to couple together.

8, according to the rotor structure of claim 1,2 or 5 described a kind of motors, it is characterized in that: inner edge (2) is provided with a plurality of inner convex platforms of heaving (6).

9, the rotor structure of a kind of motor according to claim 8 is characterized in that: the inner convex platform (6) on the inner edge (2) is corresponding with the radial position of outer rim (1) upper groove (4) or outer lug boss (3).

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