CN211670697U

CN211670697U - Rotor punching sheet and motor with same

Info

Publication number: CN211670697U
Application number: CN202020702942.5U
Authority: CN
Inventors: 李雪东; 廉峰; 杨光
Original assignee: Suzhou Jiadian Flying Ball Motor Co ltd
Current assignee: Suzhou Jiadian Permanent Magnet Motor Technology Co.,Ltd.
Priority date: 2020-04-30
Filing date: 2020-04-30
Publication date: 2020-10-13
Anticipated expiration: 2030-04-30

Abstract

The utility model relates to a rotor punching and motor that has it, it includes the rotor punching body and sets up in the circular shaft hole at inside center, the rotor punching the outer fringe of body with the mounting groove has been seted up on the annular face between the edge in shaft hole, the mounting groove includes the groove group that sets up in pairs, every the groove group includes that two are located same water flat line and the recess that the symmetry set up, two form the supporting part between the recess, set up a permanent magnet filling groove on the line of symmetry of supporting part, the central line of permanent magnet filling groove with the line of symmetry of supporting part coincides each other, the utility model discloses a when the rotor punching is used for the motor, can reduce motor vibration noise.

Description

Rotor punching sheet and motor with same

Technical Field

The utility model relates to an electric motor rotor technical field, in particular to rotor punching and motor that has it.

Background

The punching sheet is a part produced by a punch press, the rotor punching sheet is a silicon steel sheet used as a rotor in the motor, and the punching sheet is suitable for motors with different powers because of different manufacturing specifications. The rotor punching sheets are usually very thin and have the thickness of less than 1mm, a plurality of rotor punching sheets are mutually overlapped, and then a lead is wound in the groove of each rotor punching sheet to form a rotor. The existing punching sheets are assembled into a rotor, and after the rotor is assembled into a motor, the noise is large when the rotor is started and works.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a rotor punching and motor that has it through designing the permanent magnet filling groove on the rotor punching to pack the permanent magnet in the permanent magnet filling groove, solve the big problem of noise of motor.

In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a rotor punching sheet, its includes the rotor punching sheet body and sets up the circular shaft hole at inside center, the rotor punching sheet body the outer fringe with the mounting groove has been seted up on the annular face between the edge in shaft hole, the mounting groove includes the groove group that sets up in pairs, every the groove group includes two and is located same water flat line and the recess that the symmetry set up, two form the supporting part between the recess, set up a permanent magnet filling groove on the symmetry line of supporting part, the central line in permanent magnet filling groove with the symmetry line of supporting part coincides each other.

The grooves comprise a head part, a tail part and a groove body positioned between the head part and the tail part, and the tail parts of the two grooves of each groove group are opposite.

The head part comprises a second inclined surface, a third inclined surface and a flat surface, the flat surface is connected to the rear end of the third inclined surface, the second inclined surface and the third inclined surface form a sharp corner part in a surrounding mode, and the outermost end of the sharp corner part is arranged in an arc shape.

The groove body include the lateral surface and with the lateral surface is parallel medial surface each other, straight face is relative the medial surface towards the recess is inside to be sunken to form first card platform, the afterbody is provided with the second card platform.

The included angle between the second inclined plane and the outer side face of the groove body is b, the included angle between the third inclined plane and the inner side face is c, and c is larger than b.

The permanent magnet filling groove comprises a first limiting area and a second limiting area connected with the first limiting area, the width of the first limiting area is gradually reduced from outside to inside, and the second limiting area is formed by extending the inner side of the first limiting area outwards in parallel.

The heat dissipation holes are formed in the outer edge of the shaft hole and are circular and located between the adjacent groove groups.

The utility model provides another technical scheme: an electric machine comprising: and the rotor core is composed of a plurality of rotor punching sheets.

Compared with the prior art, the beneficial effects of the utility model are that: set up a permanent magnet filling groove on the symmetry line of supporting part, permanent magnet filling inslot assembles the permanent magnet, causes the motor start and the working process in, small in noise reaches the silence effect.

Drawings

FIG. 1 is a schematic view of the rotor sheet structure of the present invention;

FIG. 2 is a schematic enlarged view of a portion of the rotor sheet shown in FIG. 1;

fig. 3 is a partially enlarged schematic view of another angle of the rotor sheet in fig. 1.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1 to 3, the present invention relates to a rotor punching sheet, which includes a rotor punching sheet body 100, a circular shaft hole 10 is disposed at the inner center of the rotor punching sheet body, an inclined key groove 11 is disposed on the shaft hole 10, the inclined key groove 11 includes a first inclined plane 111 and a vertical plane 112, a perpendicular line of the first inclined plane 111 relative to the vertical plane 112 is a, wherein a is more than 4 degrees and less than 8 degrees. The ratio of the diameter of the shaft hole 10 to the diameter of the rotor punching sheet body 100 is 29.5 +/-0.32: 58.9. the rotor punching body 100 is further provided with a mounting groove 20, the mounting groove 20 is arranged on an annular surface between the edge of the shaft hole 10 and the outer edge of the rotor punching body 100, and the mounting groove 20 comprises an even number of grooves 21.

In this embodiment, the mounting groove 20 includes eight grooves 21, each two

grooves

21a and 21b are located on the same horizontal line and symmetrically arranged to form a groove group, and the four groove groups are symmetrically arranged. Referring to fig. 1 and 2, each groove 21 includes a head portion 211, a tail portion 212, and a groove body 213 located between the head portion 211 and the tail portion 212, the tail portions 212 of the two

grooves

21a and 21b of each groove set are opposite, and a supporting portion 22 is disposed between the tail portions 212 of the two

grooves

21a and 21 b. The symmetry line of each support portion 22 extends through the center of the shaft hole 10.

Referring to fig. 2 and 3, the head portion 211 includes a second inclined surface 2111, a third inclined surface 2112 and a flat surface 2113, and the second inclined surface 2111 and the third inclined surface 2112 enclose a sharp corner portion 2114, and the outermost end of the sharp corner portion 2114 is disposed in an arc shape. The flat surface 2113 is connected to the rear end of the third inclined surface 2112, and the width of the second inclined surface 2111 is larger than the width of the third inclined surface 2112. The groove body 213 includes an outer side surface 2131 and an inner side surface 2132 parallel to the outer side surface 2131, an included angle between the second inclined surface 2111 and the outer side surface 2131 of the groove body 213 is b, an included angle between the remaining inner side surfaces 2132 of the third inclined surface 2112 is c, and c > b. The flat surface 2113 is recessed into the recess 21 relative to the inner side surface 2132 to form a first stop 2133, and the tail portion 212 has a second stop 2121. The first and

second clamping blocks

2133 and 2121 are arranged for convenient assembly and positioning.

In order to improve the heat dissipation effect, as shown in fig. 1, heat dissipation holes 30 are further formed in the outer edge of the shaft hole 11 of the rotor punching body 100, and the heat dissipation holes 30 are circular and located between two adjacent groove groups. The design of the heat dissipation holes 30 is beneficial to the rapid transmission of heat generated on the rotor punching sheet to the air, so that the rotor punching sheet is not easy to damage due to overheating, and the use efficiency of the rotor punching sheet is ensured to a certain extent. In other embodiments, the heat dissipation holes 30 may be kidney-shaped holes.

As shown in fig. 1 and fig. 3, a pair of permanent magnet filling grooves 40 is further formed in the rotor punching body 100, and the two permanent magnet filling grooves 40 are point-symmetric with respect to the center of the shaft hole 11. The permanent magnet filling groove 40 is disposed on a line of symmetry of the support 22, and a center line of the permanent magnet filling groove 40 and the line of symmetry of the support 22 coincide with each other. The permanent magnet filling groove 40 includes a first limiting region 41 and a second limiting region 42 connected to the first limiting region, the first limiting region 41 gradually decreases in width from outside to inside, and the second limiting region 42 is formed by extending the inside of the first limiting region 41 in parallel to outside.

The utility model discloses motor with this rotor punching, including rotor core, rotor core comprises the rotor punching of a plurality of above-mentioned embodiments description, for example through folding and pressing the constitution. The pair of permanent magnet filling grooves 40 are further formed in the rotor punching sheet body 100, the permanent magnets are filled in the permanent magnet filling grooves 40, and after the motor is assembled, the motor is low in noise and plays a mute role in the starting and working processes.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a rotor punching sheet, its includes the rotor punching sheet body and sets up in the circular shaft hole at inside center, its characterized in that, the rotor punching sheet body the outer fringe with the mounting groove has been seted up on the annular surface between the edge in shaft hole, the mounting groove includes the groove group that sets up in pairs, every the groove group includes two and is located same water flat line and the recess of symmetry setting, two form the supporting part between the recess, set up a permanent magnet filling groove on the line of symmetry of supporting part, the central line in permanent magnet filling groove with the line of symmetry of supporting part coincides each other.

2. The rotor sheet as recited in claim 1, wherein the grooves comprise a head portion, a tail portion and a groove body located between the head portion and the tail portion, and the tail portions of the two grooves of each groove group are opposite to each other.

3. The rotor sheet according to claim 2, wherein the head portion comprises a second inclined surface, a third inclined surface and a flat surface, the flat surface is connected to the rear end of the third inclined surface, the second inclined surface and the third inclined surface form a sharp corner portion, and the outermost end of the sharp corner portion is in an arc shape.

4. The rotor punching sheet according to claim 3, wherein the slot body comprises an outer side surface and an inner side surface parallel to the outer side surface, the straight surface is recessed relative to the inner side surface towards the inside of the groove to form a first clamping table, and the tail portion is provided with a second clamping table.

5. The rotor punching sheet according to claim 4, wherein an included angle between the second inclined surface and the outer side surface of the slot body is b, an included angle between the third inclined surface and the inner side surface is c, and c > b.

6. The rotor sheet according to claim 1, wherein the permanent magnet filling groove comprises a first limiting region and a second limiting region connected with the first limiting region, the width of the first limiting region gradually decreases from outside to inside, and the second limiting region is formed by extending outwards in parallel from the inner side of the first limiting region.

7. The rotor punching sheet according to claim 1, wherein heat dissipation holes are further formed in the outer edge of the shaft hole, are circular and are located between the adjacent groove groups.

8. An electric machine, comprising: rotor core, which is composed of a plurality of rotor sheets according to any one of claims 1 to 7.