CN214479868U

CN214479868U - Laminated iron core, stator, rotor and motor

Info

Publication number: CN214479868U
Application number: CN202022981051.0U
Authority: CN
Inventors: 孙雪; 许小华; 赵全甫; 褚文强
Original assignee: Suzhou Huichuan United Power System Co Ltd
Current assignee: Suzhou Huichuan United Power System Co Ltd
Priority date: 2020-12-10
Filing date: 2020-12-10
Publication date: 2021-10-22
Anticipated expiration: 2030-12-10

Abstract

The utility model provides a laminated iron core, a stator, a rotor and a motor, the laminated iron core comprises a plurality of first iron core pieces and a plurality of second iron core pieces, each first iron core piece is provided with a first buckle protruding from one surface, and each second iron core piece is provided with a first buckle hole corresponding to the first buckle; the first iron core piece and the second iron core piece are staggered and overlapped in a mode that the first buckle of the first iron core piece is embedded into the adjacent first buckle hole of the second iron core piece, and the adjacent layers are connected through friction force between the blanking section of the first buckle and the blanking section of the first buckle hole. Through the first iron core piece that will have the buckle with have the second iron core piece staggered mutually of detaining the hole and fold, the utility model discloses avoided the hypotenuse between the adjacent buckle to interfere, reduced the bounce-back of buckle, improved the iron core greatly and folded the pressure coefficient.

Description

Laminated iron core, stator, rotor and motor

Technical Field

The embodiment of the utility model provides a relate to the motor field, more specifically say, relate to a range upon range of iron core, stator, rotor and motor.

Background

As shown in fig. 1, in the conventional laminated core point self-clinching structure, each core piece 10 has a V-shaped buckle 11, and when the core pieces 10 are sequentially arranged, the buckle 11 of each core piece 10 is embedded into an opening of the V-shaped buckle of an adjacent core piece 10, and adjacent core pieces are connected by friction between punched sections of the buckles 11.

Theoretically, along with the increase of the stamping depth of the buckle 11, the sectional area of the blanking section of the buckle is larger, so that the buckling force of the buckle 11 is larger, and the increase of the laminating coefficient is facilitated. However, in the above solution, the inclined sides 111 of the clips 11 have elasticity, so that when the inclined sides 111 of the clips 11 of the adjacent iron core pieces 10 are connected, they resist each other, as shown in fig. 2. Increasing the punch depth of the clip 11 results in more interference of the bevel edges 111 of the clip 11 (i.e. increasing the bounce between the clips 11), so that the gap between the clips 11 cannot be reduced by increasing the pressure, and the lamination coefficient and the lamination height fluctuation range of the iron core are large. The problems of rotor injection molding glue overflow, stator open welding and the like can be caused by a large stack height fluctuation range.

SUMMERY OF THE UTILITY MODEL

The embodiment of the utility model provides a to iron core fold in the above-mentioned range upon range of iron core and fold the great problem of high fluctuation range, provide a new range upon range of iron core, stator, rotor and motor.

An embodiment of the present invention provides a laminated iron core, including a plurality of first iron core pieces and a plurality of second iron core pieces, wherein each of the first iron core pieces has a first buckle protruding from one of the surfaces, and each of the second iron core pieces has a first buckle hole corresponding to the first buckle; the first iron core piece and the second iron core piece are staggered and overlapped in a mode that the first buckle of the first iron core piece is embedded into the adjacent first buckle hole of the second iron core piece, and the adjacent layers are connected through friction force between the blanking section of the first buckle and the blanking section of the first buckle hole.

As an embodiment of the present invention, in the laminated iron core, along the direction of laminating each layer, first iron core piece and second iron core piece are overlapped with the alternate mode of one-to-one, and each the first buckle salient in the surface of first iron core piece highly be greater than the thickness of second iron core piece is less than twice the thickness of second iron core piece.

As a further improvement of an embodiment of the present invention, in the laminated iron core, along the direction of laminating each layer, first iron core piece and second iron core piece are with one first iron core piece interval is two the mode of second iron core piece is crisscross to be folded mutually, and each first buckle salient is in the height on the surface of first iron core piece and is greater than the twice of the thickness of second iron core piece and is less than the triple of the thickness of second iron core piece.

As a further improvement of an embodiment of the present invention, each the first iron core piece includes a plurality of first buckles, each the second iron core piece includes a plurality of corresponding first buckle holes.

As a further improvement of an embodiment of the present invention, the first buckle is V-shaped, and the width of the first buckle hole is adapted to the width of the first buckle hole, and the length of the first buckle hole is greater than the length of the first buckle.

As a further improvement of an embodiment of the present invention, the one deck of the laminated iron core at the head end of the mutually laminated direction is composed of a first iron core piece, and the one deck or the multiple decks of the laminated iron core at the tail end of the mutually laminated direction are composed of a second iron core piece.

As a further improvement of an embodiment of the present invention, each of the second iron core pieces has a second buckle protruding from one of the surfaces, and each of the first iron core pieces has a second buckle hole corresponding to the second buckle, and when the first iron core pieces are overlapped with the second iron core pieces, the second buckle is embedded into the second buckle hole.

The embodiment of the utility model provides a still provide a stator, include as above arbitrary any range upon range of iron core.

An embodiment of the present invention further provides a rotor, including the laminated core as described in any one of the above.

An embodiment of the present invention further provides a motor, including at least one of the stator and the rotor as described above.

Implement the utility model discloses range upon range of iron core, stator, rotor and motor have following beneficial effect: through overlapping the first iron core piece that will have the buckle with the second iron core piece that has the knot hole in a staggered way, avoided the hypotenuse between the adjacent buckle to interfere, reduced the bounce-back of buckle, improved the iron core greatly and folded the pressure coefficient.

Drawings

Fig. 1 is a schematic cross-sectional view of a laminated iron core of the prior art;

fig. 2 is a schematic perspective view of a laminated iron core in the prior art;

fig. 3 is a schematic cross-sectional structure diagram of a laminated iron core provided in an embodiment of the present invention;

fig. 4 is a schematic perspective view of a laminated iron core according to an embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

As shown in fig. 3 and 4, the embodiment of the present invention provides a schematic structural diagram of a laminated iron core, which can be applied to a stator core, a rotor core, a transformer core, etc. of a motor. The laminated iron core of the present embodiment includes a plurality of first iron core sheets 20 and a plurality of second iron core sheets 30, and the first iron core sheets 20 and the second iron core sheets 30 may be processed from the same material, for example, may be processed from silicon steel sheets, respectively; and the first and

second core pieces

20, 30 have the same shape, e.g. the same thickness, the same outer contour, etc. In addition, when the laminated core is used for a motor rotor, the first core piece 20 and the second core piece 30 may also have the same shaft hole, the same magnetic steel slot, the same lightening hole, and the like; when the laminated core is used for a stator of an electric motor, the first core piece 20 and the second core piece 30 may also have the same wire slots, the same heat dissipation holes, and the like.

In a specific application, the first core plate 20 and the second core plate 30 may be circular rings (for example, when used for a stator and a rotor of a motor), square rings (for example, when used for a transformer), or the like, according to different applications.

In the present embodiment, each first iron core plate 20 has a first buckle 21 protruding from one of the surfaces. Each second core plate 30 has a first fastening hole 31 corresponding to the first fastening 21 on the first core plate 20. Specifically, the first clip 21 and the first clip hole 31 may be formed by stamping, and a stamping hole is left on the first iron core plate 20 corresponding to the first clip 21, and two sides of the first clip 21 are formed with punched sections; the first buttonhole 31 is also formed with a punched section. Of course, in practical applications, the first buckle 21 and the first buckle hole 31 may also be processed by any other processing method, and are not limited herein.

In the laminated core of the present embodiment, the first core pieces 20 and the second core pieces 30 are alternately stacked in such a manner that the first hooks 21 of the first core pieces 20 are inserted into the first catching holes 31 of the adjacent second core pieces 30, and the adjacent layers are connected by a frictional force between the punched sections of the first hooks 21 and the punched sections of the first catching holes 31. The staggered lamination means that at least one second core segment 30 is located between two first core segments 20, but not as shown in fig. 1, in order to prevent the buckle 11 from protruding out of the end face of the laminated core, the core segment located at one end of the laminated core is processed to form a buckle hole at the buckle position.

In practical application, according to different application occasions, the layers of the laminated iron core can be fixed in a gluing mode, a welding mode and the like besides being matched and fixed through the first buckle 21 and the first buckle hole 31, so that the laminated iron core meets the use requirements of different occasions.

The first iron core piece 20 that the range upon range of iron core of this embodiment will have first buckle 21 overlaps mutually with the second iron core piece 30 that has first knot hole 31 is crisscross, has avoided the hypotenuse between the adjacent layer to interfere, has reduced the bounce-back of buckle, has improved the iron core greatly and has folded the pressure coefficient to reduce the iron core and folded high fluctuation range, improved the excessive glue and the stator core problem of opening and welding of rotor process of moulding plastics.

In an embodiment of the present invention, the first buckle 21 is V-shaped, that is, the first buckle 21 includes two inclined sides 211, and is connected to the main body of the first iron core plate 20 through the two inclined sides 211, and an opening 22 (e.g., a punched hole) is formed on the first iron core plate 20. The width of the first fastening hole 31 of the second core plate 30 is matched with the width L1 of the first clip 21, and the length L2 of the first fastening hole 31 is greater than the length L3 of the first clip. Specifically, the width of the first fastening hole 31 of the second core plate 30 may be equal to or slightly smaller than the width L1 of the first clip 21, so that the bonding strength between the punched section of the first clip 21 and the punched section of the first fastening hole 31 may be improved.

In addition, in order to increase the contact area between the punched section of the first latch 21 and the punched section of the first fastening hole 31, each first latch 21 further includes a bottom edge 212 connecting two oblique edges 211, the bottom edge 212 may be parallel to the main body portion of the first core piece 20, and both sides of the bottom edge 212 are also formed with punched sections so as to be connected to the punched end surfaces of the adjacent layers.

In an embodiment of the present invention, in the main body of the laminated core, along the stacking direction of each layer, the first core pieces 20 and the second core pieces 30 are alternately stacked one on another, for example, in the laminated core shown in fig. 3, the odd layers from top to bottom are formed by the first core pieces 20, the even layers are formed by the second core pieces 30, that is, the core pieces of the odd layers in the laminated core include the first buckles 21, and the core pieces of the even layers include the first buckle holes 31.

Accordingly, the height of each first clip 21 protruding from the surface of the first core piece 20 is greater than the thickness of the second core piece 30 and less than twice the thickness of the second core piece 30. Thus, when the first iron core pieces 20 and the second iron core pieces 30 are alternately stacked one on another, the first buckles 21 of the first iron core piece 20 of the upper layer penetrate through the first buckle holes 31 of the second iron core piece 30 of the lower layer and are embedded into the openings 22 of the first buckles 21 of the first iron core pieces 20 of the next lower layer, that is, the first buckle 21 of each first iron core piece 20 is connected with the two iron core pieces below the first buckle 21. Since the size of the first ferrite core piece 20 at the position of the opening 22 corresponding to the first opening 21 is relatively large, the inclined side 211 thereof does not interfere.

In another embodiment of the present invention, in the main body of the laminated core, the first core sheet 20 and the second core sheet 30 are alternately laminated in a manner that one first core sheet 20 is separated by two second core sheets 30 along the laminating direction of each layer, for example, along the laminating direction of each layer of the laminated core, the ith layer is composed of the first core sheet 20 from top to bottom, and the (i +1) th and (i +2) th layers are composed of the second core sheets 30, wherein i is 1+3 × n, and n is an integer greater than or equal to zero.

Accordingly, the height of each first tab 21 protruding from the surface of the first ferrite sheet 20 is more than twice the thickness of the second ferrite sheet 30 and less than three times the thickness of the second ferrite sheet 30. Thus, when the first core pieces 20 and the second core pieces 30 are alternately stacked, the first buckle 21 of the first core piece 20 of the upper layer passes through the first buckle hole 31 of the second core piece 30 of the lower two layers and is embedded into the opening 22 of the first buckle 21 of the first core piece 20 of the next lower layer, i.e. the first buckle 21 of each first core piece 20 is connected with the core pieces of the three layers below the first buckle 21. Compared with the structure that the first iron core sheet 20 and the second iron core sheet 30 are staggered and stacked in a one-to-one alternating mode, the punching depth of the first buckle 21 in the structure is larger, and the structural strength of the first buckle 21 is reduced, so that the connection strength between layers is relatively lower.

In order to increase the connection strength between the layers of the laminated core, each first core piece 20 includes a plurality of first hooks 21, and correspondingly, each second core piece 30 includes a plurality of first hook holes 31. On each first iron core plate 20, a plurality of first fasteners 21 can be uniformly distributed. For example, when the first core plate 20 is circular, the plurality of first hooks 21 may be uniformly distributed along the circumferential direction thereof, and correspondingly, the plurality of first hook holes 31 may also be uniformly distributed along the circumferential direction of the second core plate 30.

Specifically, one layer of the laminated core at the leading end in the stacking direction (for example, the top layer of the laminated core shown in fig. 3) is constituted by the first core sheet 20, and one or more layers of the laminated core at the trailing end in the stacking direction (for example, the bottom two layers of the laminated core shown in fig. 3) is constituted by the second core sheet 30. Through the mode, the first buckle 21 does not protrude out of the end face of the laminated iron core, and product processing and assembly are facilitated.

In addition, a second buckle protruding from one surface of the second iron core sheet 30 can be added on each second iron core sheet 30, a second buckle hole corresponding to the second buckle is added on each first iron core sheet 20, and when the first iron core sheet 20 and the second iron core sheet 30 are overlapped, the second buckle is embedded into the second buckle hole. This structure is suitable for the first iron core sheet 20 and the second iron core sheet 30 in the stacked iron core that is alternately overlapped one by one, and the first buckles 21 and the second buckle holes can be uniformly distributed on the first iron core sheet 20. In this way, the bonding strength between the layers of the laminated core can be improved as well.

The embodiment of the utility model provides a still provide a stator, this stator includes as above range upon range of iron core, and still include the wire casing on this range upon range of iron core, but stator coil winding is at the in-line of above-mentioned range upon range of iron core.

The embodiment of the utility model provides a still provide a rotor, this rotor includes as above range upon range of iron core, and this range upon range of iron core still includes central shaft hole, magnetism steel channel etc..

An embodiment of the present invention further provides a motor, for example, a permanent magnet motor, and the motor includes at least one of the stator and the rotor as described above.

Compare with the range upon range of iron core that current each layer V-arrangement buckle is connected in order, the utility model discloses can improve the power of buckleing certainly of buckle, avoid the hypotenuse interference of buckle, reduce the knot point bounce-back, improve the iron core and fold the pressure coefficient, improve the iron core plane degree. And simultaneously, the utility model discloses can avoid stator core to open welding and the excessive gluey problem of rotor core to very big degree, optimize production process.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention should be covered by the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A laminated iron core is characterized by comprising a plurality of first iron core pieces and a plurality of second iron core pieces, wherein each first iron core piece is provided with a first buckle protruding from one surface, and each second iron core piece is provided with a first buckle hole corresponding to the first buckle; the first iron core piece and the second iron core piece are staggered and overlapped in a mode that the first buckle of the first iron core piece is embedded into the adjacent first buckle hole of the second iron core piece, and the adjacent layers are connected through friction force between the blanking section of the first buckle and the blanking section of the first buckle hole.

2. The laminated core according to claim 1, wherein the first core pieces and the second core pieces are alternately laminated one on another in the laminating direction of the layers, and each of the first hooks protrudes from a surface of the first core piece by a height greater than a thickness of the second core piece and less than twice the thickness of the second core piece.

3. The laminated core according to claim 1, wherein in the laminated core, the first core pieces and the second core pieces are alternately laminated in such a manner that one first core piece is spaced apart from two second core pieces along a laminating direction of the layers, and a height of each of the first hooks protruding from a surface of the first core piece is greater than two times a thickness of the second core piece and less than three times the thickness of the second core piece.

4. The laminated core as claimed in claim 1, wherein each of the first core pieces includes a plurality of first snaps, and each of the second core pieces includes a plurality of corresponding first snap holes.

5. The laminated core as claimed in any one of claims 1 to 4, wherein the first hook is V-shaped, and the width of the first hook hole is adapted to the width of the first hook, and the length of the first hook hole is greater than the length of the first hook.

6. The laminated core according to any one of claims 1 to 4, wherein one layer at a leading end of the laminated core in the stacking direction is constituted by a first core sheet, and one or more layers at a trailing end of the laminated core in the stacking direction are constituted by a second core sheet.

7. The laminated core as claimed in claim 2, wherein each of the second core pieces has a second hook protruding from one of the surfaces, each of the first core pieces has a second hook hole corresponding to the second hook, and the second hook is inserted into the second hook hole when the first core piece and the second core piece are laminated.

8. A stator comprising the laminated core according to any one of claims 1 to 7.

9. A rotor characterized by comprising the laminated core according to any one of claims 1 to 7.

10. An electrical machine comprising at least one of a stator according to claim 8 and a rotor according to claim 9.