CN102801228A - Motor stator punching sheet - Google Patents

Abstract

The invention provides a stamping plate for a motor stator, which includes a stamping body, the stamping body includes a ring-shaped yoke and a plurality of teeth distributed around the circumference of the yoke, and a gap is formed between two adjacent teeth. A ruled groove; the tooth part is roughly T-shaped, which includes the tooth top and the tooth root, and the tooth root is connected to the yoke; the tooth top has an outer edge, a left edge, a right edge, a left inner edge and a right inner edge, and the tooth The root has a left edge and a right edge; the outer edge contains the left outer edge, the middle segment and the right outer edge, the left outer edge and the right outer edge are arc segments, and the middle segment is a straight line segment; the two ends of the left edge are connected to the left outer The edge is connected to the left inner edge, and the two ends of the right edge are connected to the right outer edge and the right inner edge respectively. Compared with the prior art, the stator stamping of the present invention can effectively reduce the harmonic pulsation in the motor, run more smoothly, improve the torque and efficiency of the motor, save materials and costs, and is more conducive to mass production.

Description

A motor stator stamping

technical field

The invention relates to the technical field of motors, in particular to a stamping sheet of a motor stator.

Background technique

At present, the periphery of the stator punching teeth of DC motors is designed as a full circle, and the multiple harmonic pulses generated during the rotation of the motor cannot be effectively suppressed, which affects both torque and efficiency.

Contents of the invention

The object of the present invention is to overcome the above-mentioned shortcomings and deficiencies in the prior art, and provide a stator punching plate of a motor that can improve the torque and efficiency of the motor.

In order to achieve the above object, the present invention provides a punching plate for a motor stator, which includes a punching body, the punching body includes a ring-shaped yoke and a plurality of teeth distributed around the circumference of the yoke, two adjacent A winding groove is formed between the tooth parts; the tooth part is roughly T-shaped, which includes a tooth top and a tooth root, and the tooth root is connected to the yoke; the tooth top has an outer edge, a left side Edge, right edge, left inner edge and right inner edge, said tooth root has left and right edges; is an arc segment, and the middle segment is a straight line segment; the two ends of the left edge are respectively connected with the left outer edge and the left inner edge, and the two ends of the right edge are connected with the right outer edge respectively. edge and the right inner edge are connected.

A further technical solution is that the left inner edge and the right inner edge are respectively parallel to the middle section. Preferably, the distance between the left inner edge and the right inner edge and the middle section is 1.8-2.5mm. The advantage of adopting this scheme is that it can avoid magnetic flux saturation and reduce torque ripple.

A further technical solution is that the left inner edge is connected to the left edge through a left rounded corner, and the right inner edge is connected to the right edge through a right rounded corner. Preferably, the radii of the left outer corner and the right outer corner are 1.5-2.5 mm. Adopting this scheme can effectively avoid the loss caused by the saturation of the magnetic flux passing here, which causes unnecessary heating and other effects.

A further technical solution is that the left edge is connected to the groove bottom of the wire groove on the left side of the left edge through the left fillet, and the right edge is connected to the wire groove on the right side of the right edge through the right fillet bottom of the tank. Preferably, the radius of the left inner fillet and the right inner fillet is 0.5-1.5mm. Adopting this solution has the advantages of making the magnetic flux passing through here less likely to be saturated.

A further technical solution is that the angle formed by the extension lines of the left edge and the right edge is 25°-45°. Using this scheme can make stator punches ranging from 6 teeth to 12 teeth, which can better feed the wires during winding and improve production efficiency.

A further technical solution is that the left outer edge and the right outer edge are located on the same circle, and the diameter of the circle is 60-80 mm. Adopting this scheme is mainly to facilitate production and processing, reduce production costs, and the like.

A further technical solution is that the length of the middle section accounts for 50%-70% of the entire length of the outer edge. Using this scheme can effectively reduce pulsation and make the operation more stable.

In summary, compared with the prior art, the stator punching of the present invention can effectively reduce the harmonic pulsation in the motor, run more smoothly, improve the torque and efficiency of the motor; and save materials and costs, which is more conducive to Mass production.

Description of drawings

FIG. 1 is a plan view of an embodiment of a stator punch of the present invention.

Fig. 2 is a partial enlarged view of I of the stator punching plate shown in Fig. 1 .

Detailed ways

Various embodiments of the present invention will be described in detail below, examples of which are illustrated with reference to the accompanying drawings and described below. While the invention will be described in conjunction with exemplary embodiments, it should be understood that the invention is not limited to these exemplary embodiments. On the contrary, the present invention includes not only these embodiments but also various modifications and improvements.

As shown in FIG. 1 , the motor stator punching plate of this embodiment includes a punching body 1 , the punching body 1 includes an annular yoke 4 and a plurality of teeth 2 distributed around the circumference of the yoke 4 , A winding groove 3 is formed between two adjacent tooth parts 2 . Each tooth part 2 is roughly T-shaped, and includes a tooth top 5 and a tooth root 6 , and the tooth root 6 is connected to the yoke 4 .

As shown in Figure 2, the tooth top 5 has an outer edge composed of a left outer edge 51, a middle section 52 and a right outer edge 53, and also has a left edge 54, a right edge 55, a left inner edge 56 and a right edge. Inner edge 57 , said dedendum 6 has a left edge 61 and a right edge 62 . Wherein, the left outer edge 51 and the right outer edge 53 are circular arc segments, the middle segment 52 is a straight line segment, the left outer edge 51, the middle segment 52 and the right outer edge 53 transition into a non-full circle, and the length of the middle segment 52 accounts for the whole 50%~70% of the length of the outer edge. Both ends of the left edge 54 are respectively connected with the left outer edge 51 and the left inner edge 56 , and the two ends of the right edge 55 are respectively connected with the right outer edge 53 and the right inner edge 57 . The angle formed by the extension lines of the left edge 54 and the right edge 55 is 25°-45°, for example, 26°. The left outer edge 51 and the right outer edge 53 are located on the same circle with a diameter of 60-80 mm, for example 72 mm.

The left inner edge 56 and the right inner edge 57 are parallel to the middle section 52 respectively, and the distance between the left inner edge 56 and the right inner edge 57 and the middle section 52 is 1.8-2.5mm, for example, 2mm. The left inner edge 56 is connected to the left edge 61 by a left bullnose 63, and the right inner edge 57 is connected to the right edge 62 by a right bullnose 64, wherein the radius of the left bullnose 63 and the right bullnose 64 is preferably 1.5 ~2.5mm, eg 1.5mm.

The left edge 61 is connected to the groove bottom 31 of the winding groove on the left side of the left edge 61 through the left fillet 65, and the right edge 62 is connected to the groove bottom of the winding groove on the right side of the right edge 62 through the right fillet 66. 32. The radii of the left inner fillet 65 and the right inner fillet 66 are preferably 0.5-1.5 mm, for example 0.8 mm.

What has been described above is only a preferred embodiment of the present invention. It should be pointed out that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can be made without departing from the present invention. scope of protection.

Claims (10)

1. A stator punching sheet for a motor, comprising a punching body, the punching body includes a ring-shaped yoke and a plurality of teeth distributed around the circumference of the yoke, and a gap is formed between two adjacent teeth A wire groove; the tooth portion is roughly T-shaped, which includes a tooth top and a tooth root, and the tooth root is connected to the yoke; it is characterized in that: the tooth top has an outer edge, a left edge, a right Side edges, left inner edge and right inner edge, the tooth root has left and right edges; the outer edge includes a left outer edge, a middle segment and a right outer edge, the left outer edge and right outer edge are arcs segment, the middle segment is a straight segment; the two ends of the left edge are respectively connected to the left outer edge and the left inner edge, and the two ends of the right edge are respectively connected to the right outer edge and the connected to the right inner edge. 2. The motor stator stamping according to claim 1, characterized in that: the left inner edge and the right inner edge are respectively parallel to the middle section. 3. The motor stator stamping according to claim 2, characterized in that: the distance between the left inner edge and the right inner edge and the middle section is 1.8~2.5mm. 4. The motor stator punching sheet according to claim 1, wherein the left inner edge is connected to the left edge through a left outer fillet, and the right inner edge is connected to the right inner edge through a right outer fillet. edge. 5. The motor stator stamping according to claim 4, characterized in that: the radius of the left bull fillet and the right bull fillet is 1-2.5mm. 6. The motor stator punching sheet according to claim 1, wherein the left edge is connected to the groove bottom of the embedding groove on the left side of the left edge through the left inner fillet, and the right edge is connected to the groove bottom of the embedding groove on the left side of the left edge through the right inner circle. The corner connects to the bottom of the rule channel to the right of the right edge. 7. The motor stator stamping according to claim 6, characterized in that: the radius of the left fillet and the right fillet is 0.5~1.5mm. 8. The motor stator stamping according to claim 1, characterized in that: the angle formed by the extension lines of the left edge and the right edge is 25°~45°. 9. The motor stator stamping according to claim 1, characterized in that: the left outer edge and the right outer edge are located on the same circle, and the diameter of the circle is 60-80mm. 10. The motor stator stamping according to claim 1, characterized in that: the length of the middle section accounts for 50%-70% of the entire length of the outer edge.

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