WO2015032161A1

WO2015032161A1 - Motor

Info

Publication number: WO2015032161A1
Application number: PCT/CN2013/090381
Authority: WO
Inventors: 向宇龙
Original assignee: 苏州腾龙电机科技有限公司
Priority date: 2013-09-09
Filing date: 2013-12-24
Publication date: 2015-03-12
Also published as: CN203445710U

Abstract

Disclosed is a motor that comprises a stator and a rotor. A carbon brush structure of the stator and/or rotor comprises a carbon rod, a carbon rod holder frame used for holding one extremity of the carbon rod, and a flexible component arranged within the carbon rod holder frame and abutted against the one extremity of the carbon rod. The carbon rod holder frame is made of a thermalsetting plastic. A metal core structure of the stator and/or rotor is provided with an annular magnetic yoke part and at least two protruding tooth parts on the magnetic yoke part. The magnetic yoke part is formed by fitting sequentially extremities of arced connecting parts of at least two arced fitting blocks. At least one tooth part protruding the arced connecting parts is provided on the arced fitting blocks. Each arced fitting block is formed by stacking vertically at least two arced stamping sheets. Provided at one extremity of each arced connecting part that is fitted with the adjacent arced fitting block is a groove indented at a fixed depth and extending along the lengthwise direction thereof, while provided at another extremity is a protruding part inserted into the adjacent arced fitting block. The present invention reduces steps and waste generated, thus reducing costs.

Description

a motor

Technical field

The invention relates to the field of electric machines, in particular to a motor with a novel carbon brush structure and a novel iron core structure.

Background technique

The prior art carbon brush structure includes a carbon rod, a copper sleeve fixed to the carbon rod, and a carbon rod support frame made of ordinary plastic containing the copper sleeve. In the installation, the copper sleeve is first put on, and then the two parts of the carbon rod support frame are mounted on the copper sleeve to be fixed. The copper sleeve is not easy to be deformed, and the surface is smooth and smooth, which avoids the large friction between the carbon rod and the carbon rod holder. However, the use of copper sleeves increases the cost and adds an installation step during installation, making the program cumbersome.

Moreover, in the prior art, in manufacturing an iron core of a motor, the entire single piece having the yoke portion and a plurality of equally spaced tooth portions is usually first punched out. Then, a certain number of single sheets are stacked in the vertical direction to form a core structure.

In the above method, since the entire single piece needs to be punched and cut, a complete plate having a large area is required as a raw material, and a lot of waste is generated, and the production cost is relatively high.

Summary of the invention

The present invention aims to provide a motor to reduce the number of processes, reduce waste generation, and reduce production costs.

The invention provides an electric machine including a stator and a rotor,

The carbon brush structure of the stator and/or rotor includes a carbon rod holder, a carbon rod holder for containing one end of the carbon rod, and an elastic member in the carbon rod holder and in contact with one end of the carbon rod; wherein, carbon The rod holder is made of thermosetting plastic;

The core structure of the stator and/or the rotor has an annular yoke portion and at least two teeth protruding from the yoke portion for winding the coil, the yoke portion being fastened by at least two arcs The ends of the arcuate connecting portions are spliced to each other, and the arc-shaped splicing has at least one of the tooth portions protruding from the arc-shaped connecting portion, each of the arc-shaped splicings being rushed by at least two arcs Forming a vertical stack; each of the arcuate connecting portions has a concave fixed depth and a groove extending along a length thereof at one end of the arc-shaped splicing, and an adjacent arc is inserted at the other end Forming a protrusion of a fast groove.

Preferably, the carbon rod holder is made of BMC bulk molding compound.

Preferably, the carbon rod holder is integrally injection molded from the thermosetting plastic.

Preferably, the carbon rod is directly connected to a wire at one end of the carbon rod holder or sequentially connected with a metal piece and an electric wire.

Preferably, the curved connecting portion is combined with the tooth portion on the curved splicing fast by welding or inserting.

The invention also provides an electric machine comprising a stator and a rotor,

The carbon brush structure of the stator and/or rotor includes a carbon rod, a carbon rod holder for containing one end of the carbon rod, and an elastic member in the carbon rod holder and in contact with one end of the carbon rod; wherein the carbon rod The cage is made of thermosetting plastic;

The core structure of the stator and/or the rotor has an annular yoke portion and a tooth portion formed by the yoke portion protruding in a radial direction, the core structure being formed by at least two curved splicing blocks Formed upwardly and spliced together, the arc-shaped splicing block is formed by at least two arc-shaped punching sheets, the arc-shaped punching piece having an arc-shaped connecting portion, a first bent portion and a second bent portion;

Wherein the first bent portion is formed by the two end portions of the curved connecting portion protruding in a radial direction of the arc connecting portion, and the first bent portion has a curved connecting portion a closed end, the second bent portion is formed by bending a corresponding end portion of the closed ends of the two first bent portions of the curved connecting portion; the curved connecting portion a bent portion and a second bent portion are formed with a cavity;

Two adjacent arc-shaped punching pieces of the arc-shaped splicing block, and the inner side wall of the cavity of the arc-shaped punching piece of the latter one is wrapped around the previous one of the arc-shaped punching pieces On the outer side wall of the cavity, the width and height of the arc-shaped punching piece of the latter are respectively greater than the width and height of the preceding arc-shaped punching piece;

The arcuate connecting portions of the outermost arc-shaped punching pieces of the adjacent arc-shaped splicing blocks are in contact with each other, and the first bent portions of the outermost arc-shaped punching pieces of the adjacent arc-shaped splicing blocks are in contact with each other a second bent portion of the outermost curved punch of the adjacent arc-shaped splicing block is in contact;

The arcuate connecting portions adjacent in the circumferential direction are spliced to form an annular yoke portion of the iron core, the first bent portion adjacent in the circumferential direction, and the second adjacent portion in the circumferential direction The bent portion is spliced to form a tooth portion of the iron core.

Preferably, the carbon rod holder is made of BMC bulk molding compound.

Preferably, the one end portion of the both end portions of the arcuate connecting portion that is in contact with the arc-shaped connecting portion adjacent in the circumferential direction is formed with a groove having a certain depth and extending along the longitudinal direction of the arcuate connecting portion. The other side end portion protrudes to form a plug portion; the adjacent arc-shaped splicing block is inserted through the insertion portion of the arc-shaped connecting portion into the groove of the circumferentially adjacent arc-shaped connecting portion.

[Advantageous effects of the present invention:

The utility model uses a carbon brush cage made of thermosetting plastic, so that it is not necessary to install a copper sleeve on the carbon rod, which saves cost and saves a process compared with the prior art. Moreover, the iron core structure adopted by the invention reduces the generation of waste and reduces the cost.

DRAWINGS

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings to be used in the embodiments will be briefly described below. Obviously, the drawings in the following description are only some of the present invention. For the embodiments, those skilled in the art can obtain other drawings according to the drawings without any creative work.

Figure 1 is a schematic view showing the structure of a carbon brush of the present invention;

2 is a schematic structural view of an arc-shaped punching piece according to Embodiment 1 of the present invention;

3 is a schematic diagram of a curved splicing fast structure in the first embodiment of the present invention;

4 is a schematic structural view of a core according to Embodiment 1 of the present invention;

Figure 5 is a flow chart of the method in the present invention;

6 is a schematic structural view of an arc-shaped punching piece according to Embodiment 2 of the present invention;

7 is a schematic structural view of a curved splicing block according to Embodiment 2 of the present invention;

FIG. 6 is a schematic structural view of a core according to Embodiment 2 of the present invention.

detailed description

The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, but not all embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention are within the scope of the present invention.

Embodiment 1 of the present invention provides an electric motor having a stator and a rotor. The stator and/or the rotor have the carbon brush structure shown in FIG. The carbon brush structure in this embodiment includes a carbon rod 11, a carbon rod holder 12 for containing one end of the carbon rod 11, and an elastic member 13 in the carbon rod holder 12 and in contact with one end of the carbon rod 11; The carbon rod holder 12 is made of a thermosetting plastic.

In an embodiment of the present invention, the end of the carbon rod 11 that is in contact with the elastic member 13 is further connected with an electric wire 14 which can be directly connected to the electric wire or can be connected to the electric wire through a metal piece, more specifically, the carbon rod. It can be connected to a length of wire, then connected to the metal piece through the wire, and finally connected to the other wire through the metal piece.

Because thermosetting plastics have the property of being cured or insoluble (melted) under heat or other conditions, they are not easily affected by the external environment and are not easily deformed even in a high temperature environment. Moreover, the surface of the carbon rod holder made of thermosetting plastic is smooth and smooth, and the friction with the carbon rod is small. Therefore, in the present invention, the carbon rod is directly inserted into the carbon rod holder without being fixed by the copper sleeve. Compared with the prior art, the cost of installing the copper sleeve is reduced, and the process of installing the copper sleeve is reduced.

The carbon rod holder of the present invention can be integrally injection molded from a thermosetting plastic. It can also be combined and fixed by a plurality of thermosetting plastic parts. For example, the carbon rod holder is divided into two parts, the upper cover and the lower cover, and the upper cover and the lower cover have protruding flanges, and the flanges are correspondingly provided with fixing holes. Insert the carbon rod into the upper or lower cover before installation, then attach the other part and fix it by nut and fixing hole.

In another embodiment, the inner side of the carbon rod holder is symmetrically opened with two grooves along its length, and the carbon rod can be inserted into the carbon rod holder along the groove. In a preferred embodiment of the present invention, in order to increase heat dissipation, a plurality of heat dissipation holes may be formed in the carbon rod holder so that the carbon rods can dissipate heat in time.

In a preferred embodiment, the carbon rod protection frame described above may be made of BMC (Block Molding Compound).

The first embodiment of the present invention further provides a method for manufacturing a core structure, which specifically includes the following steps:

First, a raw material such as a steel sheet material is punched to form an arc-shaped punch. The structure of the arc-shaped punching piece is as shown in FIG. 2, and has an arc-shaped connecting portion 21 and a tooth portion 22 protruding from the arc-shaped connecting portion 21, wherein a certain depth is formed on one end portion of both sides of the arc-shaped connecting portion. The groove 3 has a protrusion 4 formed on the corresponding end portion. Each curved punch can have a plurality of teeth, such as at least two.

It should be noted that, when punching the arc-shaped punching piece, the arc-shaped connecting portion and the tooth portion may be punched out at one time, or the arc-shaped connecting portion may be punched out first, and then the toothed portion is formed by punching, and then the arc is formed. The connecting portion and the tooth portion are combined to form an arc-shaped punching piece. The specific combination can be performed by welding or plugging. Specifically, the plugging manner may be that a plug groove is formed on the arc connecting portion, the protruding tooth portion forms a plug connector, and then the plug connector is inserted into the plug slot.

Next, at least two identical curved punches are stacked in the vertical direction to create a curved stitching fast. The arc-shaped splicing structure is as shown in FIG. 3, and has an arc-shaped connecting portion 31, a tooth portion 32, and a groove extending at one end of the curved connecting portion 31 and having a certain depth and extending along the longitudinal direction of the arc-shaped splicing. 33 and a projection 44 projecting from the corresponding end of the curved connecting portion 31. The arcuate connecting portion 31, the tooth portion 32, the groove 33, and the tooth portion 32 are respectively formed by laminating the arcuate connecting portion 21 of the arc-shaped punching piece, the tooth portion 22, the groove 23, and the protruding portion 24.

Thereafter, a certain number (at least two) of curved splicings are quickly spliced to each other to form a core structure. Specifically, the arc-shaped splicing protrusions are inserted into the adjacent arc-shaped splicing fast grooves to quickly splicing the arc-shaped splicing together to form a core structure as shown in FIG. 4. Among them, the arcuate connecting portion 31 is spliced to form an annular yoke portion 41, and the arc-shaped splicing fast tooth portion 32 constitutes a tooth portion 42 of the core structure. The tooth portion 42 may be formed by projecting the arcuate connecting portion 41 outward, or the arcuate connecting portion 41 may be formed to protrude inward.

In the present invention, the angle of the arcuate connecting portion can be determined according to the number of arc splicing, so that a certain number of arc splicings are quickly spliced to each other to form the annular yoke portion 41 shown in FIG.

Corresponding to the above method, the first embodiment of the present invention provides a core structure of a motor, as shown in FIG. 4, having an annular yoke portion 41 and at least two protruding from the yoke portion 41 for winding the coil. Tooth portion 42. The yoke portion 41 is formed by merging the ends of at least two arc-shaped splicing fast arc-shaped connecting portions, and the arc-shaped splicing has at least one tooth portion protruding from the curved connecting portion, and each arc-shaped splicing is fast At least two arc-shaped punches are vertically stacked.

Each of the arcuate connecting portions has a groove having a concave fixed depth and extending along a length thereof at one end of the arc-shaped splicing, and the other end portion has a groove inserted into the adjacent arc-shaped splicing fast. Highlights.

The tooth portion 42 may be formed such that the arcuate connecting portion 41 protrudes outward, or the arcuate connecting portion 41 may protrude inward.

The arc-shaped punching piece may be integrally formed, or may be formed by combining an arc-shaped connecting portion and a tooth portion.

Embodiment 2 of the present invention provides an electric motor having a stator and a rotor. The stator and/or the rotor have the carbon brush structure shown in FIG. For related content, refer to the description of Embodiment 1, which will not be described in detail herein.

The second embodiment further provides a method for manufacturing a motor core. As shown in FIG. 5, the method specifically includes the following steps:

S11. Pressing a raw material such as a copper sheet or a silicon steel sheet to form an arc-shaped punch having a curved connecting portion, a first bent portion, and a second bent portion.

FIG. 6 provides a specific structure of the arc-shaped punching piece, which has a curved connecting portion 51, and a symmetrical first bent portion 52 in which the corresponding ends of the curved connecting portion 51 project outward in the radial direction thereof. And a symmetrical second bent portion 53 formed by bending the end portion corresponding to the closed end of the first bent portion 52 on both sides. The curved connecting portion 51, the first bent portion 51, and the second bent portion 52 constitute an inner cavity 54. It has an inner side wall and an outer side wall.

The first bent portion 52 may also be formed by projecting opposite ends of the curved connecting portion 51 inward in the radial direction thereof.

S12, stacking at least two curved punches to form an arc-shaped mosaic block. The curved splicing block is shown in Figure 7. The curved splicing block is shown in Figure 7. Wherein, adjacent two arc-shaped punching pieces 61, the inner side wall of the cavity of the latter arc-shaped punching piece is wrapped on the outer side wall of the cavity of the preceding arc-shaped punching piece, obviously, the latter arc-shaped punching piece The width and height should be greater than the width and height of the previous curved punch, respectively.

S13. Splicing at least two arc-shaped splicing blocks to form a core. As shown in FIG. 8, wherein the arcuate connecting portions 72 of the outermost arc-shaped punching pieces of the adjacent arc-shaped splicing blocks 71 are in contact, and the first bending of the outermost arc-shaped punching pieces of the adjacent arc-shaped splicing blocks 71 is performed. The portions 73 are in contact with each other, and the second bent portions 74 of the outermost curved punching pieces of the adjacent curved splicing blocks 71 are in contact with each other, and the circumferentially adjacent curved connecting portions 72 are spliced to form the annular yoke portion 75 of the iron core. The first bent portion 73 adjacent in the circumferential direction and the second bent portion 74 adjacent in the circumferential direction are spliced to form the tooth portion 76 of the iron core.

In the above steps, step S11 specifically includes three ways:

The first way:

The two corresponding ends of the square plate body are bent in a radial direction of the annular yoke portion to form the first bent portion; the first bent portion has a closed end in contact with the square plate body.

Then, the corresponding ends of the closed ends of the two first bending portions are relatively bent to form the second bending portion;

Finally, the square steel body is bent to form an arcuate joint.

The second way:

The two corresponding ends of the square plate body are bent in a radial direction of the annular yoke portion to form a first bent portion; the first bent portion has a closed end in contact with the square plate body;

The square sheet body between the first bends is then bent to form an arcuate joint.

Finally, the corresponding end portion of the closed end of the first bent portion is relatively bent to form a second bent portion.

The third way:

The intermediate portion of the square sheet body is bent to form an arcuate joint.

Then, the two side ends of the square plate body and the arcuate connecting portion are bent in a radial direction of the annular yoke portion to form the first bent portion; the first bent portion has a closed end in contact with the curved connecting portion;

Finally, the corresponding end portions of the closed ends of the two first bending portions are relatively bent to form the second bending portion.

In order to achieve the splicing between the curved splicing blocks, in the present invention, before the splicing, a certain depth may be formed at one end of the two end portions of the curved connecting portion and the arc-shaped connecting portion adjacent to the circumferential direction. And a groove extending along the longitudinal direction of the arcuate connecting portion, and the other end portion protrudes to form a plug portion. The insertion portions of the curved connecting portions are then inserted into the grooves of the arc-shaped connecting portions adjacent in the circumferential direction.

Of course, in the present invention, the bonding between adjacent splicing speeds can also be achieved by means of soldering or the like, which is not specifically limited in the present invention.

Corresponding to the above method, the present invention also provides a core structure of a motor, which is shown in FIG. The yoke portion 75 having an annular shape and the tooth portion 76 formed to protrude outward in the radial direction by the yoke portion 75 are formed by the above method.

The core structure is formed by splicing the at least two arc-shaped splicing blocks 71 in the circumferential direction, and the arc-shaped splicing block 71 is formed by at least two arc-shaped slabs.

Wherein the arc-shaped punching piece has an arc-shaped connecting portion, a first bent portion and a second bent portion, and the first bent portion protrudes outward in a radial direction of the curved connecting portion by both end portions of the curved connecting portion Forming, the first bent portion has a closed end that is in contact with the curved connecting portion, and the second bent portion is formed by bending corresponding ends of the closed ends of the two first bent portions of the curved connecting portion; The shaped connecting portion, the first bent portion, and the second bent portion are formed with a cavity.

In an arc-shaped splicing block, an adjacent arc-shaped punching piece, the inner side wall of the cavity of the latter arc-shaped punching piece is wrapped on the outer side wall of the cavity of the preceding arc-shaped punching piece, The width and height of the arc-shaped punching piece of the latter are respectively greater than the width and height of the preceding arc-shaped punching piece.

In FIG. 8, the arc-shaped connecting portions of the outermost arc-shaped punching pieces of the adjacent arc-shaped splicing blocks are in contact, and the first bent portions of the outermost curved punching pieces of the adjacent arc-shaped splicing blocks are in contact with each other. The second bent portion of the outermost curved punch of the curved splicing block is in contact.

The arcuate connecting portions adjacent to each other in the circumferential direction are spliced to form an annular yoke portion of the iron core, and the first bent portions adjacent in the circumferential direction are spliced and the second bent portions adjacent in the circumferential direction are spliced together to form a core. Tooth.

In order to facilitate the splicing, one end of the both end portions of the arcuate connecting portion that is in contact with the arc-shaped connecting portion adjacent in the circumferential direction may be formed with a groove having a certain depth and extending along the longitudinal direction of the arcuate connecting portion. The other side end portion protrudes to form a plug portion; the adjacent arc-shaped splicing block is inserted into the groove of the arc-shaped connecting portion adjacent to the circumferential direction through the insertion portion of the arc-shaped connecting portion.

The specific embodiments described above further explain the objects, technical solutions and beneficial effects of the present invention. It should be noted that the above description is only one specific embodiment of the present invention, and those skilled in the art may Various changes and modifications of the invention are possible without departing from the spirit and scope of the invention. Thus, it is intended that the present invention cover the modifications and modifications of the invention

Claims

An electric machine comprising a stator and a rotor, characterized in that

2. A machine as claimed in claim 1 wherein said carbon rod holder is made of BMC bulk molding compound.

3. The electric machine according to claim 1, wherein the carbon rod holder is integrally injection molded from the thermosetting plastic.

4. The motor according to claim 1, wherein said carbon rod is directly connected to a wire at one end of said carbon rod holder or is sequentially connected with a metal piece and an electric wire.

5. The motor according to claim 1, wherein said arcuate connecting portion is coupled to said tooth portion on said arc-shaped splicing by welding or insertion.

6. An electric machine comprising a stator and a rotor, characterized in that

7. The machine of claim 6 wherein said carbon rod holder is made of BMC bulk molding compound.

8. The electric machine according to claim 6, wherein the carbon rod holder is integrally injection molded from the thermosetting plastic.

9. The motor according to claim 6, wherein said arcuate connecting portion is combined with said tooth portion on said arc-shaped splicing by welding or insertion.

10. The motor according to claim 6, wherein one side end portion of both end portions of the arcuate connecting portion that is in contact with the circumferentially adjacent arcuate connecting portion is formed to have a certain depth and along the arc a groove extending in the longitudinal direction of the connecting portion, the other end portion protruding to form a plug portion; and the adjacent arc-shaped splicing block is inserted into the circumferentially adjacent arc-shaped connection through the insertion portion of the arc-shaped connecting portion The grooves of the portion are spliced.