CN216530773U

CN216530773U - Punching sheet for rotor outer iron core, permanent magnet rotor and motor

Info

Publication number: CN216530773U
Application number: CN202123330415.XU
Authority: CN
Inventors: 赵远升
Original assignee: Zhongshan Broad Ocean Motor Co Ltd
Current assignee: Zhongshan Broad Ocean Motor Co Ltd
Priority date: 2021-12-28
Filing date: 2021-12-28
Publication date: 2022-05-13
Anticipated expiration: 2031-12-28

Abstract

The utility model discloses a punching sheet for an outer iron core of a rotor, a permanent magnet rotor and a motor, wherein the punching sheet comprises a plurality of punching sheet sections which are circumferentially distributed, each punching sheet section comprises an arc-shaped part and an inner tooth part which protrudes out of the inner side of the arc-shaped part, the end parts of the arc-shaped parts of two adjacent punching sheet sections are mutually spliced, so that the punching sheet sections which are circumferentially distributed form an annular punching sheet, the punching sheet sections are designed in a segmented mode, each punching sheet section is in an arc-shaped design, and during sample arrangement, the punching sheet sections are arranged side by side in the same direction.

Description

Punching sheet for rotor outer iron core, permanent magnet rotor and motor

The technical field is as follows:

the utility model relates to a punching sheet for an outer iron core of a rotor, a permanent magnet rotor and a motor.

The background art comprises the following steps:

the design of the multi-station progressive die of the stator core punching sheet and the rotor core punching sheet of the existing motor generally comprises manufacturability analysis, blank expansion, sample arrangement, die design and die part design, wherein the reasonable sample arrangement (referring to a method for blanking strip materials or arranging on plate materials) of the stator core punching sheet and the rotor core punching sheet is an important prerequisite for the successful design of the die. And the structure of the die, whether the station arrangement is reasonable or not, the material utilization rate and the guarantee of the dimensional accuracy of the die parts all depend on the correct layout arrangement. Therefore, the layout is the key of the design of the multi-station progressive die for the stator and the rotor of the motor iron core.

Whether the layout is reasonable or not also influences the utilization rate of materials, and the reasonable arrangement of workpieces (namely the economic utilization of the materials) has a close relation with the shapes of parts, so that the motor punching sheet which needs to be designed not only meets the requirements of electromagnetic performance, structural strength and the like, but also considers the optimization of the layout during punching of the punching sheet, namely, the reasonable shape, the shape size and the like of the punching sheet are required to be provided.

The rotor of the magnetic shoe surface-mounted structure used in the current market comprises a rotor outer iron core and a rotor inner iron core, wherein the rotor outer iron core is sleeved outside the rotor inner iron core, the rotor outer iron core 1A and the rotor inner iron core are formed by injection molding, the rotor outer iron core is laminated by a plurality of rotor outer punching sheets, and the rotor inner iron core is laminated by a plurality of rotor inner punching sheets; as shown in fig. 1, the conventional rotor outer punching sheet 1A is of a full-circle structure, and when a sample is punched, the rotor outer punching sheet 1A is sleeved outside the rotor inner punching sheet 2A, so that the rotor outer punching sheet 1A and the rotor inner punching sheet 2A can be punched simultaneously, but when the rotor outer punching sheet 1A of the full-circle structure is used for punching the sample, a gap between adjacent rotor outer punching sheets 1A is large, so that more waste materials are generated during punching of the rotor punching sheets, waste of punched strip materials or sheet materials is caused, the utilization rate of the punched strip materials or sheet materials is low, and the manufacturing cost is high.

The utility model content is as follows:

the utility model aims to provide a punching sheet for an outer iron core of a rotor, a permanent magnet rotor and a motor, which have the advantages of high material utilization rate during stock layout, less waste generation amount, material saving and low manufacturing cost.

The purpose of the utility model is realized by the following technical scheme.

The utility model aims to provide a punching sheet for an outer iron core of a rotor, which comprises a plurality of punching sheet sections distributed circumferentially, wherein each punching sheet section comprises an arc-shaped part and an inner tooth part protruding out of the inner side of the arc-shaped part, and the end parts of the arc-shaped parts of two adjacent punching sheet sections are mutually spliced, so that the punching sheet sections distributed circumferentially form an annular punching sheet.

Preferably, the ends of the arc-shaped parts of two adjacent segments are spliced and fixed with each other in an injection molding mode.

Preferably, the two ends of the arc-shaped part are respectively provided with a splicing fixing hole for the injection molding material to pass through.

Preferably, a positioning hole is formed in the middle of the arc-shaped part.

Preferably, the positioning hole is a square hole.

Preferably, the punch segments are provided with 4 segments.

The second purpose of the utility model is to provide a permanent magnet rotor, which comprises a rotor outer iron core, a rotor inner iron core, a plurality of permanent magnets and a plastic package body, wherein the rotor outer iron core is sleeved outside the rotor inner iron core, the plastic package body is used for plastic packaging the rotor outer iron core and the rotor inner iron core into a whole, the plurality of permanent magnets are circumferentially attached to the outer wall surface of the rotor outer iron core at intervals, the rotor inner iron core comprises an inner circular ring and a plurality of outer tooth parts extending from the outer side wall of the inner circular ring, the plurality of outer tooth parts are circumferentially distributed at intervals, the rotor outer iron core is laminated by a plurality of rotor outer punching sheets, the rotor outer punching sheet adopts the punching sheet for the rotor outer iron core, the rotor outer punching sheet comprises a plurality of punching sheets circumferentially distributed in sections, the arc parts of the punching sheets are spliced into an outer circular ring, a cavity is formed between the outer circular ring and the outer circular ring, and the inner tooth parts and the outer tooth parts of the punching sheets are mutually staggered and arranged at intervals in the cavity, part of the plastic package body is filled in the cavity and wrapped outside the inner tooth part and the outer tooth part.

Preferably, the rotor inner core comprises a plurality of rotor inner stamped sheets which are stacked and arranged, and each rotor inner stamped sheet is provided with 4 outer tooth parts.

A third object of the present invention is to provide an electric machine comprising a rotor employing a permanent magnet rotor as described above.

Compared with the prior art, the utility model has the following effects:

1) according to the punching sheet for the outer iron core of the rotor, the punching sheet is designed in a segmented mode, each punching sheet is designed in an arc shape, a plurality of punching sheets are arranged side by side in the same direction during sample arrangement, and the punching sheets are designed in the arc shape, so that the gap between every two adjacent punching sheets can be effectively reduced, the two adjacent punching sheets are closer, the waste amount of the punching sheet of the rotor can be reduced during punching, the sheet can be better saved, the utilization rate of the sheet can be improved, and the manufacturing cost can be reduced.

2) Other advantages of the present invention are described in detail in the examples section.

Description of the drawings:

FIG. 1 is a schematic structural diagram of a rotor outer sheet and a rotor inner sheet layout provided for the prior art;

fig. 2 is a schematic structural diagram of a punching segment according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram of a punching sheet according to a first embodiment of the present invention;

fig. 4 is a schematic structural diagram of a punched segment layout according to a first embodiment of the present invention;

fig. 5 is a schematic perspective view of a permanent magnet rotor according to a second embodiment of the present invention;

fig. 6 is a schematic front view of a permanent magnet rotor according to a second embodiment of the present invention;

FIG. 7 is a schematic cross-sectional view A-A provided in FIG. 6;

fig. 8 is a schematic structural diagram of a rotor inner punching layout according to a second embodiment of the present invention.

The specific implementation mode is as follows:

the present invention will be described in further detail below with reference to specific embodiments and with reference to the accompanying drawings.

The first embodiment is as follows:

as shown in fig. 2 to 4, the embodiment provides a punching sheet for an outer iron core of a rotor, including a plurality of sections of circumferentially distributed punching sheet segments 1, each punching sheet segment 1 includes an arc portion 11 and an inner tooth portion 12 protruding from the inner side of the arc portion 11, the end portions of the arc portions 11 of two adjacent punching sheet segments 1 are spliced with each other, so that the punching sheet segments 1 of the plurality of sections of circumferentially distributed punching sheet segments 1 form an annular punching sheet, the punching sheet segments are designed in a segmented manner, and each punching sheet segment 1 is designed in an arc shape, during sample discharge, the punching sheet segments 1 are arranged side by side in the same direction, because the punching sheet segments 1 are designed in an arc shape, a gap between two adjacent punching sheet segments 1 can be effectively reduced, so that the two adjacent punching sheet segments 1 are closer to each other, so that the punching sheet of the rotor can reduce the amount of waste materials during punching, so that the sheet materials can be better saved, so that the utilization rate of the sheet materials is improved, and the manufacturing cost is reduced.

The end parts of the arc-shaped parts 11 of the two adjacent sections of the punching segments 1 are mutually spliced and fixed in an injection molding mode; specifically, splicing fixing holes 111 for injection molding materials to pass through are respectively formed at two ends of the arc-shaped part 11; simple structure makes towards the piece equipment convenient.

A positioning hole 112 is formed in the middle of the arc part 11; preferably, the positioning hole 112 is a square hole; due to the design of the square hole, the punching segment 1 is accurately positioned during laminating, and the positioning can be completed only by one positioning hole 112, so that the design of a punching die can be simplified.

The punching segment 1 is provided with 4 segments, is reasonable in design, and can greatly improve the utilization rate of materials and reduce the manufacturing cost by carrying out sectional type design on the punching sheet under the condition that the rotor punching sheet meets the requirements of electromagnetic performance, structural strength and the like.

Example two:

as shown in fig. 5 to 7, the present embodiment provides a permanent magnet rotor, including an outer rotor core 2, an inner rotor core 3, a plurality of permanent magnets 4, and a plastic package body 5, wherein the outer rotor core 2 is sleeved outside the inner rotor core 3, the plastic package body 5 plastic packages the outer rotor core 2 and the inner rotor core 3 into a whole, the plurality of permanent magnets 4 are circumferentially attached to an outer wall surface of the outer rotor core 2 at intervals, the inner rotor core 3 includes an inner ring 31 and a plurality of outer tooth portions 32 extending from an outer side wall of the inner ring 31, the plurality of outer tooth portions 32 are circumferentially distributed at intervals, the outer rotor core 2 is laminated together by a plurality of outer rotor punching sheets, the outer rotor punching sheets adopt the punching sheets for the outer rotor core described in the first embodiment, the outer rotor punching sheets include a plurality of circumferentially distributed punching sheet segments 1, arc portions of the plurality of punching sheet segments 1 are spliced into an outer ring 21, a cavity is formed between the outer ring 21 and the inner ring 31, the internal tooth parts 12 and the external tooth parts 32 of the punching segment 1 are arranged in the cavity at intervals in a staggered mode, and part of the plastic package body 5 is filled in the cavity and wraps the external tooth parts 32 and the internal tooth parts 12.

As shown in fig. 8, the inner rotor core 3 includes a plurality of stacked inner rotor laminations 30, each inner rotor lamination 30 is provided with 4 outer tooth portions 32, the 4 outer tooth portions 32 are circumferentially and uniformly distributed at intervals, the structure of the inner rotor laminations is simplified as much as possible when the rotors meet the requirements of electromagnetic performance, structural strength and the like, and materials are saved, and the 4-tooth structure enables the inner rotor laminations to be arranged in a sample, the outer tooth portions 32 of the adjacent inner rotor laminations are in staggered fit with each other by deflecting 45 ° in the arrangement method of the adjacent inner rotor laminations, so that the interval between the adjacent inner rotor laminations is reduced, the inner adjacent two rotors are closer to each other, the rotor laminations can reduce the waste during punching, the plates can be better saved, the utilization rate of the plates can be improved, and the manufacturing cost can be reduced.

Example three:

the embodiment provides a motor, which comprises a rotor, wherein the rotor adopts the permanent magnet rotor.

The above embodiments are only preferred embodiments of the present invention, but the present invention is not limited thereto, and any other changes, modifications, substitutions, combinations, simplifications, which are made without departing from the spirit and principle of the present invention, are all equivalent replacements within the protection scope of the present invention.

Claims

1. The utility model provides a towards piece that outer iron core of rotor was used which characterized in that: the punching segment comprises a plurality of segments (1) which are distributed in the circumferential direction, each punching segment (1) comprises an arc-shaped part (11) and an inner tooth part (12) which protrudes out of the inner side of the arc-shaped part (11), and the end parts of the arc-shaped parts (11) of two adjacent segments (1) are spliced with each other, so that the punching segments (1) distributed in the circumferential direction form an annular punching sheet.

2. The punching sheet for the rotor outer core according to claim 1, characterized in that: the end parts of the arc-shaped parts (11) of the two adjacent punching segments (1) are mutually spliced and fixed in an injection molding mode.

3. The punching sheet for the rotor outer core according to claim 2, characterized in that: and splicing fixing holes (111) for allowing injection molding materials to pass through are respectively formed at two ends of the arc-shaped part (11).

4. The punching sheet for the rotor outer core according to claim 3, characterized in that: the middle part of the arc-shaped part (11) is provided with a positioning hole (112).

5. The punching sheet for the rotor outer core according to claim 4, characterized in that: the positioning hole (112) is a square hole.

6. The punching sheet for the rotor outer core according to any one of claims 1 to 5, characterized in that: the punching segment (1) is provided with 4 segments.

7. The utility model provides a permanent magnet rotor, including outer iron core (2) of rotor, iron core (3) in the rotor, a plurality of permanent magnet (4) and plastic-sealed body (5), outer iron core (2) of rotor overlaps in iron core (3) outside in the rotor, plastic-sealed body (5) become integrative with outer iron core (2) of rotor and iron core (3) plastic-sealed in the rotor, a plurality of permanent magnet (4) circumference interval pastes on the outer wall of iron core (2) outside the rotor, iron core (3) include interior ring (31) and a plurality of outer tooth portion (32) that stretch out on interior ring (31) lateral wall in the rotor, circumference interval distribution is followed in a plurality of outer tooth portion (32), outer iron core (2) of rotor are in the same place by the outer punching sheet stack of a plurality of rotors, a serial communication port: the rotor outer punching sheet adopts the punching sheet for the rotor outer iron core according to any one of claims 1 to 6, the rotor outer punching sheet comprises a plurality of punching sheets (1) which are circumferentially distributed, arc-shaped parts of the punching sheets (1) are spliced into an outer ring (21), a cavity is formed between the outer ring (21) and the inner ring (31), inner tooth parts (12) and outer tooth parts (32) of the punching sheets (1) are arranged in the cavity in a staggered and spaced mode, and part of plastic package bodies (5) are filled in the cavity and wrapped outside the inner tooth parts (12) and the outer tooth parts (32).

8. A permanent magnet rotor according to claim 7, characterized in that: the rotor inner iron core (3) comprises a plurality of rotor inner punching sheets (30) which are stacked and arranged, and each rotor inner punching sheet (30) is provided with 4 outer tooth parts (32).

9. An electric machine comprising a rotor, characterized in that: the rotor is a permanent magnet rotor as claimed in any one of claims 7 to 8.