CN202798189U - Stator punching sheet, stator core, and motor - Google Patents

Abstract

The utility model provides a stator punching sheet, a stator core, and a motor, the stator punching sheet is provided with a yoke portion and a plurality of teeth extending to a center direction of the stator punching sheet from the yoke portion, a groove is formed between two adjacent teeth, the stator punching sheet is provided with a hollow inner hole, outer edges of the stator punching sheet comprise two pairs of scrape edges, each pair of scrape edges comprises two scrape edges parallel to each other, wherein a distance between two scrape edges parallel to each other is between 66mm and 72mm, a diameter of the inner hole is between 38mm and 46mm, a groove port of the groove has a width between 1.4mm and 2.6mm, and a circle radius of a groove bottom of the groove is between 2.7mm and 3.4mm. The stator punching sheet, the stator core, and the motor can reduce ring width of the stator punching sheet, so magnetic field density of the yoke portion and the teeth of the stator core is more uniform, and noises in motor operation are reduced.

Description

Stator punching, stator core and motor

Technical field

The utility model relates to machine field, especially relates to a kind of stator punching, the stator core that is overrided to form by this stator punching and the motor with this stator core.

Background technology

Motor is widely used in the various electric equipments of industrial production and life, referring to Fig. 1, the end cap 11,12 that existing motor has housing 10 and is positioned at housing 10 two ends, housing 10 and end cap 11,12 surround a cavity, stator 15 and rotor 18 are installed in the cavity, and stator 15 has stator core 16 and is embedded into winding coil 17 on stator core 16.Rotor 18 is installed in the stator 15, and can be with respect to stator 15 rotations.Armature spindle 19 is installed in the rotor 18, and with rotor 18 interference fit, armature spindle 19 rotates under the drive of rotor 18, thus outside outputting power.

Stator core 16 is overrided to form by the identical stator punching of multi-disc shape, referring to Fig. 2, being stamped to form by silicon steel sheet of every a slice stator punching 20, and stator punching 20 is for having the square of four rounded corners, it has the peripheral yoke section 21 that is positioned at, yoke section 21 is extended with a plurality of teeth 22 to the center position of stator punching 20, forms groove 23 between two adjacent teeth 22, so the quantity of groove 23 equates in the quantity of tooth 22.

The outward flange of stator punching 20 comprises two pairs of side cuts, and every a pair of side cut comprises two parallel side cuts, as cut edge 26 with cut edge 27 parallelly, it consists of a pair of side cut.And, in tooth 22, have circular hole 25 in the hollow.

In the existing stator punching 20, article two, the distance B between the parallel side cut is between 80 millimeters to 90 millimeters, namely cut edge 26 and the distance of cutting edge between 27 be between 80 millimeters to 90 millimeters, the diameter phi A1 of interior circular hole is generally less, therefore the ring width of stator punching 20 is larger, cause groove 23 areas of stator punching 20 also larger, groove 23 area utilizations are lower, so also cause the utilance of silicon steel sheet lower.

And the magnetic leakage factor of the stator core 16 that this stator punching 20 is made is larger, causes the breakdown torque of motor and starting torque to descend, during the motor operation temperature rise higher, cause the useful life of motor shorter, thereby have influence on the motor reliability of operation.For the magnetic flux that increases stator core and the temperature rise when reducing the motor operation, usually improve magnetic loading with the quantity that increases winding coil 17 and the use amount mode of silicon steel sheet, but will increase like this production cost of motor.

In addition, the stator core 16 that uses said stator punching 20 to make, when motor moves, the magnetic density of yoke section 21 is approximately 7100 Gausses, and the magnetic density at tooth 22 places is approximately 3000 Gausses, cause like this on the stator 15 magnetic density inhomogeneous, cause easily vibration during the motor operation, and produce noise.

Summary of the invention

Main purpose of the present utility model provides a kind of comparatively uniform stator punching of magnetic density that makes stator.

Another purpose of the present utility model provides the higher stator core of a kind of silicon steel sheet utilance.

An again purpose of the present utility model provides the motor that a kind of functional reliability is higher and noise is less.

For realizing main purpose of the present utility model, a plurality of teeth that the stator punching that the utility model provides has yoke section and the center position to stator punching extends from yoke section, form groove between two adjacent teeth, and stator punching has circular hole in the hollow, the outward flange of stator punching comprises two pairs of side cuts, every a pair of side cut comprises two two side cuts that are parallel to each other, wherein, distance between two side cuts that are parallel to each other is between 66 millimeters to 72 millimeters, the diameter of interior circular hole is between 38 millimeters to 46 millimeters, the width of rebate of groove is between 1.4 millimeters to 2.6 millimeters, and the bottom land radius of circle of groove is between 2.7 millimeters to 3.4 millimeters.

By such scheme as seen, the distance between the side cut that is parallel to each other of stator punching reduces, and ring width also reduces thereupon, and the magnetic density of yoke section and tooth section is comparatively approaching, and the magnetic density of stator is more even during the motor operation.In addition, owing to the distance between the side cut of stator punching reduces, and interior Circularhole diameter does not have to change substantially, and the area of groove is reduced, thereby reduces the use amount of silicon steel sheet, improves the utilization rate of silicon steel sheet.

A preferred scheme is to be respectively equipped with an installing hole on each angle of stator punching.Like this, can conveniently the motor stator that is overrided to form by the multi-disc stator punching be installed, be conducive to the use of motor stator.

For realizing another purpose of the present utility model, the stator core that the utility model provides is overrided to form by the identical stator punching of multi-disc shape, a plurality of teeth that each stator punching has yoke section and the center position to stator punching extends from yoke section, form groove between two adjacent teeth, and stator punching has circular hole in the hollow, the outward flange of stator punching comprises two pairs of side cuts, every a pair of side cut comprises two two side cuts that are parallel to each other, wherein, distance between two side cuts that are parallel to each other is between 66 millimeters to 72 millimeters, the diameter of interior circular hole is between 38 millimeters to 46 millimeters, the width of rebate of groove is between 1.4 millimeters to 2.6 millimeters, and the bottom land radius of circle of groove is between 2.7 millimeters to 3.4 millimeters.

By such scheme as seen, distance between two side cuts that the punching of stator core is parallel to each other greatly reduces, the area of stator punching is corresponding reducing also, thereby improve the utilance of silicon steel sheet, and the magnetic density of stator core is more even during machine operation, the noise that produces when being conducive to reduce machine operation.

For realizing an again purpose of the present utility model, the motor that the utility model provides comprises stator and rotor, stator comprises stator core and is embedded in winding coil on the stator core, stator core is overrided to form by the identical stator punching of multi-disc shape, a plurality of teeth that each stator punching has yoke section and the center position to stator punching extends from yoke section, form groove between two adjacent teeth, and stator punching has circular hole in the hollow, the outward flange of stator punching comprises two pairs of side cuts, every a pair of side cut comprises two two side cuts that are parallel to each other, wherein, distance between two side cuts that are parallel to each other is between 66 millimeters to 72 millimeters, the diameter of interior circular hole is between 38 millimeters to 46 millimeters, and the width of rebate of groove is between 1.4 millimeters to 2.6 millimeters, and the bottom land radius of circle of groove is between 2.7 millimeters to 3.4 millimeters.

This shows, distance between parallel two side cuts of the stator punching photograph of motor is more approaching with the diameter of interior circular hole, and the magnetic density of yoke section and tooth section is also comparatively approaching, thereby so that the magnetic density of stator is comparatively even, more stable during the motor operation, the noise of generation is less.

Description of drawings

Fig. 1 be existing motor partly cut open figure.

Fig. 2 is the structure chart of existing stator punching.

Fig. 3 is the structure chart of the utility model stator punching embodiment.

Fig. 4 is the partial enlarged drawing of the utility model stator punching embodiment.

The utility model is described in further detail below in conjunction with drawings and Examples.

Embodiment

The end cap that the motor of present embodiment has housing and is positioned at the housing both sides, housing and end cap surround a cavity, and stator and rotor are installed in the cavity, and stator has stator core and is embedded into winding coil on stator core, rotor is installed in the stator, and can rotate with respect to stator.Armature spindle is installed in the rotor, and with the rotor interference fit, armature spindle rotates under the drive of rotor, and outside outputting power.

Stator core is overrided to form by the identical stator punching of multi-disc shape, and every a slice stator punching is stamped to form by silicon steel sheet.Referring to Fig. 3, stator punching 30 is for having the square of rounded corner, and it has a plurality of teeth 32 that are positioned at peripheral yoke section 31 and extend to stator punching 30 center positions from yoke section 31.In the present embodiment, the quantity of tooth 32 is 16, and during practical application, the quantity of tooth 32 can be arranged to 24.

Form groove 33 between two adjacent teeth 32, groove 33 is the grooves with an opening, and it roughly resembles a pear in shape, and width of rebate is less than the Breadth Maximum in the groove 33.And, offer the interior circular hole 34 of hollow at the middle part of stator punching 30.

Outward flange at stator punching 30 is provided with four side cuts 36,37,38,39, article four, side cut 36,37,38,39 forms two pairs of side cuts, every a pair of side cut comprises two side cuts that are parallel to each other, as cut edge and 36 37 be parallel to each other with cutting edge, side cut partners, and cut edge 38 with cut edge 39 parallelly, form another to cutting edge.

In the present embodiment, the distance B between two adjacent side cuts is between 66 millimeters to 72 millimeters, preferably, is 69 millimeters.The diameter phi A of interior circular hole 34 is between 38 millimeters to 46 millimeters, preferably, is 43 millimeters.Like this, stator punching 30 ring widthes of present embodiment are less, the use amount that is conducive to save silicon steel sheet.

On four angles of stator punching 30, be respectively equipped with an installing hole 35, the diameter phi B of installing hole 35 is between 4.2 millimeters to 6.3 millimeters.

Referring to Fig. 4, the width of rebate C of the groove 33 of stator punching 30 is between 1.4 millimeters to 2.6 millimeters, preferably, is 1.84 millimeters, and the bottom land radius of a circle R of groove 33 is between 2.7 millimeters to 3.4 millimeters, preferably, is 3.01 millimeters.

Like this, because the distance before two side cuts being parallel to each other of stator punching 30 greatly reduces, but the diameter phi A of interior circular hole do not reduce substantially, and the ring width of stator punching 30 reduces, thereby reduced the use amount of silicon steel sheet, also made yoke section 31 more even with the magnetic density on the tooth 32.Calculate by the magnetic density to stator core, the stator core that the stator punching of use present embodiment is made, the magnetic density of yoke section 31 is approximately 4500 Gausses when motor moves, and the magnetic density of tooth 32 is approximately 7000 Gausses.As seen, the magnetic density on the magnetic density of yoke section 31 and the tooth 32 is comparatively even, is difficult for vibration-generating during the motor operation, and noise is corresponding minimizing also.

And, owing to the width of rebate C of groove 33, the redesign of bottom land radius of a circle R, the area of groove 33 is reduced to some extent, improved the utilization rate of silicon steel sheet.Simultaneously, use the motor maximum moment that this stator punching 30 makes to increase, in the time of also avoiding the motor operation temperature rise too high, prolong useful life of motor.

It is emphasized that at last the utility model is not limited to above-mentioned execution mode, in the size range of setting, change also should be included in the protection range of the utility model claim such as distance, width of rebate and bottom land radius of circle between cutting edge.

Claims (10)

1. stator punching comprises

Yoke section and a plurality of teeth that the center position to described stator punching extends from described yoke section, form groove between two adjacent teeth, and described stator punching has circular hole in the hollow, the outward flange of described stator punching comprises two pairs of side cuts, and every a pair of side cut comprises two two described side cuts that are parallel to each other;

It is characterized in that:

Distance between two described side cuts that are parallel to each other is between 66 millimeters to 72 millimeters, the diameter of described interior circular hole is between 38 millimeters to 46 millimeters, the width of rebate of described groove is between 1.4 millimeters to 2.6 millimeters, and the bottom land radius of circle of described groove is between 2.7 millimeters to 3.4 millimeters.

2. stator punching according to claim 1 is characterized in that:

Distance between two described side cuts that are parallel to each other is 69 millimeters, and the diameter of described interior circular hole is 43 millimeters, and the width of rebate of described groove is 1.84 millimeters, and the bottom land radius of circle of described groove is 3.01 millimeters.

3. stator punching according to claim 1 and 2 is characterized in that:

Be respectively equipped with an installing hole on each angle of described stator punching.

4. stator punching according to claim 3 is characterized in that:

The diameter of described installing hole is between 4.2 millimeters to 6.3 millimeters.

5. stator core, the stator punching identical by the multi-disc shape is overrided to form, a plurality of teeth that each described stator punching has yoke section and the center position to described stator punching extends from described yoke section, form groove between two adjacent teeth, and described stator punching has circular hole in the hollow, the outward flange of described stator punching comprises two pairs of side cuts, and every a pair of side cut comprises two two described side cuts that are parallel to each other;

It is characterized in that:

Distance between two described side cuts that are parallel to each other is between 66 millimeters to 72 millimeters, the diameter of described interior circular hole is between 38 millimeters to 46 millimeters, the width of rebate of described groove is between 1.4 millimeters to 2.6 millimeters, and the bottom land radius of circle of described groove is between 2.7 millimeters to 3.4 millimeters.

6. stator core according to claim 5 is characterized in that:

Distance between two described side cuts that are parallel to each other is 69 millimeters, and the diameter of described interior circular hole is 43 millimeters, and the width of rebate of described groove is 1.84 millimeters, and the bottom land radius of circle of described groove is 3.01 millimeters.

7. it is characterized in that according to claim 5 or 6 described stator cores:

Be respectively equipped with an installing hole on each angle of described stator punching.

8. motor comprises

Stator and rotor, described stator has stator core and is embedded in winding coil on the described stator core, described stator core is overrided to form by the identical stator punching of multi-disc shape, a plurality of teeth that each described stator punching has yoke section and the center position to described stator punching extends from described yoke section, form groove between two adjacent teeth, and described stator punching has circular hole in the hollow, the outward flange of described stator punching comprises two pairs of side cuts, and every a pair of side cut comprises two two described side cuts that are parallel to each other;

It is characterized in that:

Distance between two described side cuts that are parallel to each other is between 66 millimeters to 72 millimeters, the diameter of described interior circular hole is between 38 millimeters to 46 millimeters, the width of rebate of described groove is between 1.4 millimeters to 2.6 millimeters, and the bottom land radius of circle of described groove is between 2.7 millimeters to 3.4 millimeters.

9. motor according to claim 8 is characterized in that:

Distance between two described side cuts that are parallel to each other is 69 millimeters, and the diameter of described interior circular hole is 43 millimeters, and the width of rebate of described groove is 1.84 millimeters, and the bottom land radius of circle of described groove is 3.01 millimeters.

10. it is characterized in that according to claim 8 or 9 described motors:

Be respectively equipped with an installing hole on each angle of described stator punching.

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