TWI763066B - Motor assembly and rotor - Google Patents

Abstract

A motor assembly and a rotor are provided. The rotor has a core shaft, a carrier, a plurality of iron cores, a plurality of permanent magnets, and two stop pieces. The carrier has a plurality of bumps spaced apart from each other and arranged in a shape that is radiation. Each section of the bumps is in a dovetail shaped, so that two of the bumps adjacent to each other jointly has a dovetail slot. The iron cores are respectively arranged on the dovetail slots. Two of the iron cores adjacent to each other jointly has a configuration space. Each of the iron cores has a dovetail block disposed in the dovetail slot. The permanent magnets are respectively arranged in the configuration spaces. The two stop pieces are respectively disposed at two side of the carrier. Accordingly, the rotor can effectively reduce the production cost of the motor assembly.

Description

Motor assembly and rotor

The invention relates to a motor assembly and a rotor, in particular to a modular motor assembly and a rotor.

With the development of science and technology, existing permanent magnet motors have been widely used in many fields, such as: aerators, intelligent robotic arms, electric scooters, water pumps, electric bicycles, fans, electric vehicles, air conditioning equipment, industrial fans, etc. The rotor of the existing permanent magnet motor is provided with a rotor iron core made of a plurality of silicon steel sheets. In the manufacture of the rotor iron core, conditions such as the size of the motor, the size and appearance of the permanent magnet to be configured need to be considered. The silicon steel sheets are bent and stacked layer by layer to form a ring-shaped structure, but this method makes it difficult and expensive to manufacture the rotor core of the existing permanent magnet motor.

Therefore, the inventor believes that the above-mentioned defects can be improved. Nate has devoted himself to research and application of scientific principles, and finally proposes an invention with reasonable design and effective improvement of the above-mentioned defects.

The technical problem to be solved by the present invention is to provide a motor assembly and a rotor for the deficiencies of the prior art, which can effectively improve the possible defects of the prior art permanent magnet motor.

An embodiment of the present invention discloses a motor assembly, including: a rotor, including: a mandrel, defining an axial direction; a carrier, made of a non-magnetic conductive material, the carrier includes a perforated portion and a connection An annular part of the perforated part, the perforated part is sleeved on the mandrel, the annular part has a plurality of protrusions spaced from each other, and each of the protrusions is along the axial direction. The vertical section is dovetail-shaped, so that a dovetail groove is formed between any two adjacent convex blocks, and a plurality of the dovetail grooves are arranged in a radial shape on the annular part; a plurality of iron cores, They are respectively arranged on a plurality of the dovetail grooves, and any two adjacent iron cores do not contact each other and form a configuration space together; wherein, each of the iron cores has an opposite setting end and a limit Each of the setting ends has a dovetail block, the dovetail blocks are arranged in the corresponding dovetail grooves, and each of the limiting ends has two sides facing the adjacent two limiting ends, respectively. a stopper block; a plurality of permanent magnet pieces are respectively arranged in the plurality of the arrangement spaces; in any one of the arrangement spaces, the permanent magnet pieces are blocked by the stoppers of the two adjacent iron cores The stopper and the protruding piece are blocked and kept in the arrangement space; and two stopper pieces are arranged on both sides of the carrier, and the two stopper pieces can limit a plurality of the iron cores and a plurality of the permanent magnet pieces to move along the axial direction; and a stator arranged on the periphery of the rotor.

An embodiment of the present invention further discloses a rotor, comprising: a mandrel defining an axial direction; a carrier made of a non-magnetically conductive material, the carrier including a perforated part and a ring connected to the perforated part a shape part, the perforated part is sleeved on the mandrel, the annular part has a plurality of protrusions spaced apart from each other and arranged in a radial direction, each of the protrusions is perpendicular to the axial direction. The surface is dovetail-shaped, so that a dovetail groove is formed between any two adjacent said bumps; a plurality of iron cores are respectively arranged on the plurality of said dovetail grooves, and any two adjacent said iron The cores are not in contact with each other and together form a configuration space; wherein, each of the iron cores has an opposite setting end and a limit end, each of the setting ends has a dovetail block, and the dovetail block is arranged on the corresponding In the dovetail slot, each of the limiting ends has a stopper on the two sides facing the adjacent two limiting ends, respectively; a plurality of permanent magnets are respectively arranged in the plurality of configuration spaces ; In any one of the arrangement spaces, the permanent magnets are held in the arrangement space by the stopper blocks and the projections of the two adjacent iron cores and held in the arrangement space; and two The stopper pieces are arranged on both sides of the carrier, and the two stopper pieces can restrict the movement of the plurality of the iron cores and the plurality of the permanent magnet pieces along the axial direction.

To sum up, the motor assembly and rotor disclosed in the embodiments of the present invention can be achieved by “the dovetail blocks of the plurality of iron cores are arranged in the plurality of the dovetail grooves arranged in a radial shape” and “each The permanent magnets are arranged in the configuration space common to any two adjacent iron cores, so that the carrier of the present invention, a plurality of the iron cores, and a plurality of the permanent magnets It can be produced in a modular manner, and a plurality of the iron cores and a plurality of the permanent magnet pieces can be arranged on the carrier in the axial direction during the assembly process, which greatly simplifies the production difficulty and can effectively Reduce production costs.

For a further understanding of the features and technical content of the present invention, please refer to the following detailed descriptions and drawings of the present invention. However, the drawings provided are only for reference and description, and are not intended to limit the present invention.

The following are specific embodiments to illustrate the embodiments of the “motor assembly and rotor” disclosed in the present invention, and those skilled in the art can understand the advantages and effects of the present invention from the content disclosed in this specification. The present invention can be implemented or applied through other different specific embodiments, and various details in this specification can also be modified and changed based on different viewpoints and applications without departing from the concept of the present invention. In addition, the drawings of the present invention are merely schematic illustrations, and are not drawn according to the actual size, and are stated in advance. The following embodiments will further describe the related technical contents of the present invention in detail, but the disclosed contents are not intended to limit the protection scope of the present invention.

It should be understood that although terms such as "first", "second" and "third" may be used herein to describe various elements or signals, these elements or signals should not be limited by these terms. These terms are primarily used to distinguish one element from another element, or a signal from another signal. In addition, the term "or", as used herein, should include any one or a combination of more of the associated listed items, as the case may be.

Referring to FIGS. 1 to 8 , this embodiment provides a motor assembly 100 . As shown in FIGS. 1 to 3 , the motor assembly 100 includes a rotor 1 and a stator 2 . The stator 2 is disposed on the periphery of the rotor 1 , and the rotor 1 can rotate relative to the stator 2 .

It should be noted that the rotor 1 and the stator 2 are collectively defined as the motor assembly 100 in this embodiment. However, the present invention is not limited to this. For example, the rotor 1 can also be used alone (eg, sold) or used with other components. The structure of each element of the motor assembly 100 will be introduced separately below, and the connection relationship between the various elements of the motor assembly 100 will be described in due course.

As shown in FIGS. 3 and 5 , the rotor 1 includes a mandrel 11 , a carrier 12 disposed on the mandrel 11 , and a carrier 12 disposed between the mandrel 11 and the carrier 12 . The limit block 13 , a plurality of iron cores 14 arranged on the carrier 12 , a plurality of permanent magnets 15 arranged between the iron cores 14 , and two stoppers arranged on the carrier 12 Sheet 16 , and two clips 17 disposed on the mandrel 11 .

The mandrel 11 has a long rod structure and is made of non-magnetic material (eg, aluminum alloy, stainless steel, or reinforced plastic). The mandrel 11 defines an axial direction along its length. AD. The mandrel 11 has a limit slot 111 and two buckle slots 112 in this embodiment, the limit slot 111 is a long slot structure extending along the axial direction AD, the limit slot 111 is approximately disposed between the centers of the mandrels 11 and has a predetermined length PL. The two locking grooves 112 are disposed on both sides of the limiting groove 111 , and the two locking grooves 112 are annular groove structures surrounding the outer edge of the mandrel 11 .

The carrier 12 may be made of a non-magnetic material (eg, aluminum alloy, stainless steel, or reinforced plastic). In this embodiment, the length of the carrier 12 along the axial direction AD is slightly greater than The predetermined length PL, but the present invention is not limited to what is contained in this embodiment. As shown in FIG. 4 to FIG. 6 , the carrier 12 includes a perforated portion 121 , three connecting portions 122 , and an annular portion 123 . The perforated portion 121 is sleeved on the mandrel 11 , and the The perforated portion 121 has a slot 1211 arranged along the axial direction AD. The position and length of the slot 1211 correspond to the limit slot 111 , so that the slot 1211 is connected to the limit slot 111 . A contact space RS for arranging the limit block 13 is formed between them. When the limit block 13 is arranged in the abutment space RS, the limit block 13 can abut against the limit block 13 . The position slot 111 and the inner edge of the locking slot 1211 make the carrier 12 rotate synchronously with the mandrel 11 .

Of course, the manner in which the carrier 12 rotates synchronously with the mandrel 11 is not limited to that in this embodiment. For example, the carrier 12 has a matching protrusion, and the mandrel 11 has a matching groove, and the matching protrusion and the matching groove can be fixed in a tight fit manner.

Referring to FIG. 6 and FIG. 7 , the three connecting portions 122 are connected to the perforated portion 121 and the annular portion 123 . Specifically, one end of the three connecting portions 122 is connected to the outer edge of the perforated portion 121 , and the other end is connected to the inner edge of the annular portion 123 , but the present invention is not limited to what is described in this embodiment. . For example, in other embodiments not shown in the present invention, the number of the connecting portions 122 of the carrier 12 may be adjusted according to the structural strength requirements, or the connecting portions 122 may be omitted, so that the The annular portion 123 is directly connected to the perforated portion 121 .

The annular portion 123 has a plurality of protrusions 1231 spaced apart from each other, and the vertical cross-section of each protrusion 1231 along the axial direction AD has a dovetail shape, so that any two adjacent protrusions A dovetail groove 1232 is formed between the 1231 , and a plurality of the dovetail grooves 1232 are radially arranged on the annular portion 123 .

As shown in FIGS. 6 to 8 , a plurality of the iron cores 14 are respectively disposed on the plurality of the dovetail slots 1232 , and any two adjacent iron cores 14 are not in contact with each other and together form an arrangement space AS , the length of each of the iron cores 14 along the axial direction AD is substantially the same as the length of the carrier 12 along the axial direction AD in this embodiment, but the present invention is not limited to this contained in the examples.

In detail, each of the iron cores 14 has an opposite setting end 141 and a limit end 142 , and each of the setting ends 141 has a dovetail block 1411 , and the dovetail block 1411 is disposed on the corresponding dovetail. In the groove 1232 , that is, a plurality of the iron cores 14 are also arranged on the outer edge of the carrier 12 in a radial manner.

The end surface of each of the limiting ends 142 is arc-shaped, so that an imaginary connecting line CL of the plurality of limiting ends 142 is circular (as shown in FIG. 6 and FIG. 7 ), and the imaginary connecting line CL is circular. It has a common center with the mandrel 11 . Each of the limiting ends 142 has a blocking block 1421 on two sides facing the two adjacent limiting ends 142 . The connecting line CL is configured, and any two adjacent stop blocks 1421 are spaced apart from each other without contacting each other.

In addition, each of the iron cores 14 further has two grooves 143 in this embodiment, the two grooves 143 are arranged on both sides of the dovetail block 1411 , and each of the grooves 143 A bottom edge 1431 of each of the grooves 143 is not in contact with the outer edge of the corresponding protrusion 1231 , the bottom edge 1431 of each groove 143 is semicircular, and its center C is located in the groove 143 . Of course, the two grooves 143 of each of the iron cores 14 may also be omitted according to requirements in other embodiments not shown.

Referring back to FIG. 3 , FIG. 6 and FIG. 7 , the plurality of permanent magnets 15 are permanent magnets and are respectively disposed in the plurality of the arrangement spaces AS. Specifically, each of the permanent magnets 15 is a rectangular cylinder in this embodiment, and the length of each of the permanent magnets 15 along the axial direction AD is approximately the same as that of the carrier 12 . The lengths of the axial directions AD are the same, that is to say, in each of the arrangement spaces AS, only one of the permanent magnets 15 is provided, and the permanent magnets 15 are surrounded by two adjacent ones of the permanent magnets 15 . The blocking block 1421 and the protruding block 1231 of the iron core 14 are blocked and kept in the arrangement space AS, but the present invention is not limited to that in this embodiment. For example, in each of the configuration spaces AS, two permanent magnet pieces 15 may also be provided, that is, the sum of the lengths of any two permanent magnet pieces 15 along the axial direction AD It is approximately equal to the length of the arrangement space AS (the carrier 12 ).

Referring back to FIG. 2 and FIG. 3 , the two blocking pieces 16 are made of non-magnetic material (eg, aluminum alloy, stainless steel, or reinforced plastic) and are disposed on the two sides of the carrier 12 . On the side, the two blocking pieces 16 cover the carrier 12, part of each of the permanent magnet pieces 15, and part of each of the iron cores 14 in this embodiment. The blocking pieces 16 can limit the plurality of the iron cores 14 and the plurality of the permanent magnets 15 to move along the axial direction AD.

The two snaps 17 are C-shaped annular structures in this embodiment, and are respectively disposed on the side of the two blocking pieces 16 away from the carrier 12 , and the two snaps 17 is disposed on the two snap grooves 112 of the mandrel 11, so as to prevent the two blocking pieces 16 from moving along the axial direction AD. Of course, the two blocking pieces 16 can also restrict their movement along the axial direction AD in other ways, for example, the two blocking pieces 16 are fixed on the mandrel 11 in a tight fit manner.

In order to more clearly illustrate the inventive spirit of the motor assembly 100 of the present invention, the assembly method of the motor assembly 100 will be described below, but the assembly sequence in the description can be adjusted by the designer, and is not limited contained in this example.

Referring back to FIG. 3 , FIG. 4 and FIG. 6 , the limiting block 13 is arranged in the limiting groove 111 of the mandrel 11 , and the carrier 12 is sleeved along the axial direction AD. It is disposed on the mandrel 11 so that the engaging groove 1211 of the carrier 12 is located at a position corresponding to the limiting groove 111 . The dovetail blocks 1411 of the iron cores 14 are disposed in the dovetail grooves 1232 of the carrier 12 along the axial direction AD, so that the outer edges of the dovetail blocks 1411 and The inner edges of the dovetail grooves 1232 are fixed to each other in a form-fitting manner. The plurality of permanent magnets 15 are arranged along the axial direction AD in the plurality of arrangement spaces AS formed by any two adjacent iron cores 14 . The two blocking pieces 16 are arranged on both sides of the carrier 12 along the axial direction AD, so as to cover the carrier 12 , part of each of the permanent magnet pieces 15 , and part of the carrier 12 . of each of the iron cores 14 . The two snaps 17 are disposed on the two snap grooves 112 of the mandrel 11 along the axial direction AD, so that the two snaps 17 restrict the two stops The sheet 16 moves along the axial direction AD to complete the assembly of the rotor 1 , and then the stator 2 is sleeved on the outer edge of the rotor 1 to complete the assembly of the motor assembly 100 .

[Technical effects of the embodiments of the present invention]

To sum up, the motor assembly 100 and the rotor 1 disclosed in the embodiments of the present invention can be disposed in the plurality of dovetail grooves 1232 in a radial configuration through the dovetail blocks 1411 of the plurality of iron cores 14 . ” and “Each of the permanent magnets 15 is arranged in the arrangement space AS common to any two adjacent iron cores 14”, so that the carrier 12 of the present invention, a plurality of the iron cores 14. A plurality of the permanent magnet pieces 15 can be manufactured in a modular manner, and a plurality of the iron cores 14 and a plurality of the permanent magnet pieces 15 can be arranged in the axial direction AD in the assembly process. On the carrier 12, the manufacturing difficulty is greatly simplified and the manufacturing cost can be effectively reduced.

In addition, in the motor assembly 100 and the rotor 1, a plurality of the permanent magnets 15 are fixed in the axial direction AD through the arrangement space AS formed by any two adjacent iron cores 14, Therefore, when the long rotor 1 is to be fabricated, the plurality of permanent magnets 15 installed therein can be arranged in sections in the axial direction, that is, there is more than one permanent magnet in each configuration space. Therefore, the length of the plurality of permanent magnets 15 along the axial direction AD is too long, which increases the difficulty of manufacture.

Furthermore, the motor assembly 100 and the rotor 1 can be arranged in the plurality of the configuration spaces AS in the axial direction through the plurality of the permanent magnets 15, so that the maintenance personnel can directly connect the two Any one of the permanent magnet pieces 15 can be repaired by removing each of the blocking pieces 16 , so that the subsequent maintenance of the motor assembly 100 and the rotor 1 is more convenient.

It is worth mentioning that the motor assembly 100 and the rotor 1 of the present invention are arranged in a radiating manner, so in the vertical cross-section of the axial direction AD, the plurality of permanent magnets 15 The length and thickness (width) can be adjusted according to the size and requirements of the motor assembly 100 , so that the motor assembly 100 and the rotor 1 of the present invention have a larger magnetic flux than the conventional motor.

The content disclosed above is only a preferred feasible embodiment of the present invention, and is not intended to limit the scope of the present invention. Therefore, any equivalent technical changes made by using the contents of the description and drawings of the present invention are included in the application of the present invention. within the scope of the patent.

100: Motor assembly 1: Rotor 11: Mandrel 111: Limit slot 112: Buckle slot 12: Carrier 121: Perforated part 1211: Card slot 122: Connection part 123: Ring part 1231: bump 1232: Dovetail Slot 13: Limit block 14: Iron core 141: Setting side 1411: Dovetail Block 142: Limit end 1421: Stopper 143: Groove 1431: Bottom edge 15: Permanent magnets 16: Stopper 17: Snap fasteners 2: Stator AD: Axial direction PL: Predetermined length RS: against the space AS: Configuration space CL: hypothetical connecting line C: the center of the circle

FIG. 1 is a schematic perspective view of a motor assembly of the present invention.

2 is a schematic perspective view of the rotor of the motor assembly of the present invention when the stator is separated.

3 is an exploded schematic view of the rotor of the motor assembly of the present invention.

FIG. 4 is a schematic plan view of the IV-IV section line of FIG. 2 .

FIG. 5 is an enlarged schematic view of the V region of FIG. 4 .

FIG. 6 is a schematic plan view of the section line VI-VI of FIG. 2 .

FIG. 7 is an enlarged schematic view of the VII region of FIG. 6 .

8 is a schematic perspective view of the iron core of the motor assembly of the present invention.

1: Rotor 11: Mandrel 111: Limit slot 112: Buckle slot 12: Carrier 121: Perforated part 1211: Card slot 122: Connection part 123: Ring part 13: Limit block 14: Iron core 15: Permanent magnets 16: Stopper 17: Snap fasteners AD: Axial direction

Claims (8)

A motor assembly, comprising: a rotor, including: a mandrel, defining an axial direction; a carrier, made of non-magnetic conductive material, the carrier includes a perforated part and a connection with the perforated part an annular portion, the perforated portion is sleeved on the mandrel, the annular portion has a plurality of protrusions spaced apart from each other, and the vertical cross-section of each of the protrusions along the axial direction is a dovetail A dovetail groove is formed between any two adjacent bumps, and a plurality of the dovetail grooves are arranged in a radial shape on the annular portion; a plurality of iron cores are respectively arranged in a plurality of On the dovetail groove, any two adjacent iron cores do not contact each other and form a configuration space together; wherein, each of the iron cores has an opposite setting end and a limit end, and each The setting end has a dovetail block, the dovetail block is arranged in the corresponding dovetail groove, and each of the limiting ends has a stopper block on both sides facing the adjacent two limiting ends; Wherein, each of the iron cores further has two grooves at the setting end, the two grooves are arranged on both sides of the dovetail block, and a bottom edge of each of the grooves does not touch the corresponding the outer edge of the bump; a plurality of permanent magnet pieces are respectively arranged in a plurality of the arrangement spaces; in any one of the arrangement spaces, the permanent magnet pieces are surrounded by two adjacent iron cores The stop block and the convex block are blocked and kept in the configuration space; and two stop pieces are arranged on both sides of the carrier, and the two stop pieces can limit a plurality of The iron core and the plurality of permanent magnets move along the axial direction; and a stator is arranged on the periphery of the rotor. The motor assembly of claim 1, wherein each of the configuration spaces is provided with more than one of the permanent magnets. The motor assembly of claim 1, wherein each of the permanent magnets is a rectangular cylinder. The motor assembly of claim 1, wherein the rotor further comprises a limit block; the perforated portion of the carrier has a slot arranged along the axial direction; the mandrel There is a limit slot corresponding to the position of the card slot, the limit block is arranged between the card slot and the limit slot, and the limit block can abut the limit slot and the abutment The inner edge of the top groove makes the carrier rotate synchronously with the mandrel. The motor assembly of claim 1, wherein, in each of the grooves, the bottom edge is in a semicircular shape, and the center of the bottom edge is located in the groove. A rotor, comprising: a mandrel defining an axial direction; a carrier made of a non-magnetically conductive material, the carrier comprising a perforated part and an annular part connected to the perforated part, the perforated part The annular portion is sleeved on the mandrel, and the annular portion has a plurality of bumps spaced apart from each other and arranged in a radial manner, and the vertical cross-section of each bump along the axial direction is dovetail-shaped, so that the A dovetail groove is jointly formed between any two adjacent said bumps; a plurality of iron cores are respectively arranged on the plurality of said dovetail grooves, and any two adjacent said iron cores are not in contact with each other and are in common with each other. A configuration space is formed; wherein, each of the iron cores has an opposite setting end and a limit end, each of the setting ends has a dovetail block, and the dovetail block is arranged in the corresponding dovetail groove, Each of the limiting ends has a stopper on both sides facing the adjacent two limiting ends; wherein, each of the iron cores further has two recesses at the setting end two grooves are arranged on both sides of the dovetail block, and a bottom edge of each of the grooves does not contact the outer edge of the corresponding convex block; a plurality of permanent magnet pieces are respectively arranged on in a plurality of the disposition spaces; in any one of the disposition spaces, the permanent magnets are stopped by the stoppers and the projections of the two adjacent iron cores and held on the in the configuration space; and two stopper pieces, which are arranged on both sides of the carrier, and the two stopper pieces can restrict the plurality of the iron cores and the plurality of the permanent magnet pieces along the axial direction direction move. The rotor of claim 6, wherein, in each of the grooves, the bottom edge is in a semicircular shape, and the center of the bottom edge is located in the groove. The rotor of claim 6, wherein each of the permanent magnets is a rectangular cylinder.

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