阅读说明：本技术 电机铁芯静电机涂粉用的治具及电机铁芯静电机涂粉方法 (Tool for coating powder on motor iron core electrostatic machine and powder coating method of motor iron core electrostatic machine ) 是由 胡永贺 于 2019-11-21 设计创作，主要内容包括：本发明涉及电机铁芯静电机涂粉用的治具及电机铁芯静电机涂粉方法；电机铁芯静电机涂粉用的治具,所述电机铁芯包括环状铁芯本体；所述环状铁芯本体包括若干个可相互拼接形成环状结构的铁芯单元；每一铁芯单元包括轭部以及自所述轭部沿径向延伸以形成所述环状铁芯本体的内齿的齿部；所述治具包括定位组件；所述定位组件包括定位主体；所述定位主体的外侧壁上开设有至少一个定位槽；所述定位槽的形状以及尺寸与所述铁芯单元的所述轭部的形状以及尺寸相适配,所述轭部卡入所述定位槽；所述齿部沿径向凸出于所述定位主体外侧壁设置。通过采用该电机铁芯静电机涂粉用的治具,其可简化具有内齿的电机铁芯的涂粉工序,提高涂粉的效率以及涂粉的精度。(The invention relates to a jig for coating powder on a motor iron core electrostatic machine and a powder coating method for the motor iron core electrostatic machine; the motor iron core comprises an annular iron core body; the annular iron core body comprises a plurality of iron core units which can be mutually spliced to form an annular structure; each core unit includes a yoke portion and a tooth portion extending in a radial direction from the yoke portion to form an internal tooth of the annular core body; the jig comprises a positioning component; the positioning assembly comprises a positioning main body; the outer side wall of the positioning main body is provided with at least one positioning groove; the shape and the size of the positioning groove are matched with those of the yoke part of the iron core unit, and the yoke part is clamped into the positioning groove; the tooth part is arranged to protrude from the outer side wall of the positioning main body along the radial direction. By adopting the jig for coating the powder on the motor iron core electrostatic machine, the powder coating process of the motor iron core with the inner teeth can be simplified, and the powder coating efficiency and the powder coating precision are improved.)

1. A jig for coating powder on a motor iron core electrostatic machine is disclosed, wherein the motor iron core comprises an annular iron core body; the annular iron core body comprises a plurality of iron core units (21) which can be spliced with each other to form an annular structure; each core unit (21) includes a yoke portion (211) and a tooth portion (212) extending radially from the yoke portion (211) to form an internal tooth of the annular core body; the jig is characterized by comprising a positioning component;

the positioning assembly comprises a positioning body (11); the outer side wall of the positioning main body (11) is provided with at least one positioning groove (111);

the shape and the size of the positioning groove (111) are matched with those of the yoke part (211) of the iron core unit (21); the yoke portion (211) is clamped into the positioning groove (111), and the tooth portion (212) protrudes out of the outer side wall of the positioning main body (11) along the radial direction.

2. The powder coating jig for the motor iron core electrostatic machine according to claim 1, characterized in that the radial depth of the positioning groove (111) is greater than or equal to the thickness of the yoke part (211);

and/or the axial length of the positioning slot (111) is greater than or equal to the height of the yoke (211).

3. The powder coating jig for the motor iron core electrostatic machine according to claim 1, wherein the side walls of the two back sides of the yoke portion (211) are respectively provided with a first clamping protrusion (2111) and a first clamping groove (2112);

two oppositely arranged side walls of the positioning groove (111) are respectively provided with a second clamping protrusion (1111) and a second clamping groove (1112);

the first clamping protrusion (2111) and the second clamping groove (1112) are correspondingly arranged so as to be clamped in the second clamping groove (1112); the second clamping protrusion (1111) is arranged corresponding to the first clamping groove (2112) and clamped in the first clamping groove (2112).

4. The powder coating jig for the motor iron core electrostatic machine according to claim 1, wherein the positioning main body (11) is a cylindrical body, and a plurality of positioning grooves (111) are provided; the positioning grooves (111) are arranged at intervals along the outer peripheral surface of the positioning main body (11);

each positioning groove (111) extends along the axial direction on the outer side wall of the positioning main body (11).

5. The powder coating jig for the motor iron core electrostatic machine according to claim 1, wherein the positioning assembly further comprises a first positioning block (12) and a second positioning block (13) arranged at two ends of the positioning main body (11) to position the iron core unit (21) in an axial direction so as to prevent the iron core unit (21) from coming out of the positioning groove (111) in the axial direction.

6. The powder coating jig for the motor iron core electrostatic machine according to claim 1, further comprising a positioning sleeve (14) sleeved on the periphery of the iron core unit (21).

7. The powder coating jig for the motor iron core electrostatic machine according to claim 6, wherein the positioning sleeve (14) comprises an annular main body, and limiting bosses (141) are arranged on the annular main body, the number of the limiting bosses corresponding to that of the positioning grooves (111); the inner side surface of the limiting boss (141) covers the outer side end face of the tooth part (212) of the iron core unit (21); and restricts the core unit from coming out of the positioning groove (111) in the radial direction.

8. The jig for applying powder to the motor iron core electrostatic machine according to claim 1, further comprising a clamping assembly;

the clamping assembly comprises a first clamping bar (151) and a second clamping bar (152) which is matched with the first clamping bar (151) to clamp the positioning assembly;

a through hole (112) is formed in the positioning main body (11) along the axial direction;

the first clamping bar (151) comprises a first cylinder (1511); one end of the first column body (1511) is provided with a screw hole (1512) extending towards the other end;

the second clamping rod (152) comprises a second cylinder (1521), a stud (1522) arranged at one end of the second cylinder (1521) and threaded with the screw hole (1512) through the through hole (112), and a limiting flange (1523) arranged between the stud (1522) and the second cylinder (1521); the positioning main body (11) is sleeved on the limiting flange (1523).

9. A powder coating method for a motor iron core electrostatic machine adopts the jig for the powder coating of the motor iron core electrostatic machine of any one of claims 1 to 8, and is characterized by comprising the following steps:

s1, providing a positioning body (11), and correspondingly clamping a yoke part (211) of an iron core unit (21) of the motor iron core into a positioning groove (111) of the positioning body (11), so that a tooth part (212) of the iron core unit (21) protrudes out of the outer side wall of the positioning body (11) along the radial direction;

s2, providing a clamping assembly, and screwing the stud (1522) of the second clamping rod (152) of the clamping assembly through the positioning body (11) and the screw hole (1512) of the first clamping rod (151) to form an assembly;

s3, placing the assembly formed in the step S2 on an electrostatic machine for coating powder.

10. A motor core includes an annular core body; the annular iron core body comprises a plurality of iron core units (21) which can be spliced with each other to form an annular structure; each core unit (21) comprises a yoke part (211) and a tooth part (212) extending from the yoke part (211) in the radial direction to form the inner teeth of the annular core body, and is characterized by further comprising an insulating powder layer formed on the surface where the yoke part (211) and the tooth part (212) are connected and the outer side wall of the tooth part (212) by the motor core electrostatic machine powder coating method of claim 9.

Technical Field

The invention relates to the field of motor manufacturing, in particular to a jig for coating powder on a motor iron core electrostatic machine and a powder coating method for the motor iron core electrostatic machine.

Background

The iron cores currently used for electric machines generally require an insulating powder to be coated on a contact surface with the coil winding in order to be insulated from the coil winding. In the prior art, an iron core with external teeth is generally clamped by clamps arranged at two ends of the iron core, and then the assembly is sent to an electrostatic machine for coating. However, this method is not applicable to an iron core having internal teeth, and it is likely that insulating powder adheres to the outer surface of the yoke portion and the inner side wall of the tooth portion of the iron core, thereby affecting the use of the iron core. At present, the surface of an iron core with internal teeth which is not desired to be coated is generally covered by a mask for coating powder, but the method has the defects of complicated operation, low efficiency and the like.

Disclosure of Invention

The invention aims to provide a jig for electrostatic motor iron core powder coating, which can be used for motor iron core powder coating, is convenient for simplifying the powder coating step and improving the powder coating efficiency, and further provides an improved electrostatic motor iron core powder coating method and a motor iron core.

The technical scheme adopted by the invention for solving the technical problems is as follows: constructing a jig for coating powder on a motor iron core electrostatic machine, wherein the motor iron core comprises an annular iron core body; the annular iron core body comprises a plurality of iron core units which can be mutually spliced to form an annular structure; each core unit includes a yoke portion and a tooth portion extending in a radial direction from the yoke portion to form an internal tooth of the annular core body; the jig comprises a positioning component;

the positioning assembly comprises a positioning main body; the outer side wall of the positioning main body is provided with at least one positioning groove;

the shape and the size of the positioning groove are matched with those of the yoke part of the iron core unit, and the yoke part is clamped into the positioning groove; the tooth part is arranged to protrude from the outer side wall of the positioning main body along the radial direction.

Preferably, a radial depth of the positioning slot is greater than or equal to a thickness of the yoke;

and/or the positioning slot axial length is greater than or equal to the height of the yoke.

Preferably, the side walls of the two back-arranged sides of the yoke part are respectively provided with a first clamping protrusion and a first clamping groove;

the two oppositely arranged side walls of the positioning groove are respectively provided with a second clamping protrusion and a second clamping groove;

the first clamping protrusion and the second clamping groove are correspondingly arranged so as to be clamped into the second clamping groove; the second clamping protrusion is arranged corresponding to the first clamping groove so as to be clamped in the first clamping groove.

Preferably, the positioning main body is a cylindrical body, and the positioning grooves are multiple; the positioning grooves are arranged at intervals along the peripheral surface of the positioning main body;

each positioning groove is arranged on the outer side wall of the positioning main body in an extending mode along the axial direction.

Preferably, the positioning assembly further comprises a first positioning block and a second positioning block which are arranged at two ends of the positioning main body; to position the core unit in an axial direction to prevent the core unit from coming out of the positioning groove in the axial direction.

Preferably, the iron core unit further comprises a positioning sleeve sleeved on the periphery of the positioning main body and the iron core unit.

Preferably, the positioning sleeve comprises an annular main body, and limiting bosses corresponding to the positioning grooves in number are arranged on the annular main body; the inner side surface of the limiting boss covers the outer side end face of the tooth part of the iron core unit; the iron core unit is limited from falling out of the positioning groove in the radial direction;

the height of the limiting boss is matched with that of the tooth part.

Preferably, the jig further comprises a clamping assembly;

the clamping assembly comprises a first clamping rod and a second clamping rod matched with the first clamping rod to clamp the positioning assembly.

Preferably, a through hole is formed in the positioning main body along the axial direction;

the first clamping bar comprises a first cylinder; one end of the first column body is provided with a screw hole extending towards the other end;

the second clamping rod comprises a second column body, a stud arranged at one end of the second column body and penetrating through the through hole to be in threaded connection with the screw hole, and a limiting flange arranged between the stud and the second column body; the positioning main body is sleeved on the limiting flange.

The invention also discloses a powder coating method of the motor iron core electrostatic machine, and the jig for coating the powder by the motor iron core electrostatic machine comprises the following steps:

s1, providing a positioning main body, and correspondingly clamping the yoke part of the iron core unit of the iron core into the positioning groove of the positioning main body, so that the tooth part of the iron core unit protrudes out of the outer side wall of the positioning main body along the radial direction;

s2, providing a clamping assembly, and screwing a stud of a second clamping rod of the clamping assembly with a screw hole of the first clamping rod through the positioning main body to form an assembly;

s3, placing the assembly formed in the step S2 on an electrostatic machine for coating powder.

The invention also constructs a motor iron core, which comprises an annular iron core body; the annular iron core body comprises a plurality of iron core units which can be mutually spliced to form an annular structure; each iron core unit comprises a yoke part and a tooth part which radially extends from the yoke part to form the inner teeth of the annular iron core body, and is characterized by further comprising an insulating powder layer which is formed on the surface of the yoke part, which is connected with the tooth part, and the outer side wall of the tooth part by adopting the motor iron core electrostatic machine powder coating method.

The implementation of the jig for the powder coating of the motor iron core electrostatic machine, the powder coating method of the motor iron core electrostatic machine and the motor iron core has the following beneficial effects: this tool accessible that motor core electrostatic machine dusting was used is gone into the shape of this location main part and the constant head tank of size and yoke shape size looks adaptation with the yoke portion card of iron core unit to make this tooth portion can be along radial protrusion in this location main part lateral wall, and then make the contact surface with the contact of coil winding expose, be convenient for the electrostatic machine to carry out the dusting to the iron core unit. By adopting the jig for coating the powder on the motor iron core electrostatic machine, the powder coating process of the motor iron core with the inner teeth can be simplified, and the powder coating efficiency and the powder coating precision are improved.

The powder coating method of the motor iron core electrostatic machine has the advantages of being simple to operate, high in powder coating efficiency and high in powder coating precision.

By adopting the motor iron core electrostatic machine powder coating method, the motor iron core has the advantages of high yield and long service life.

Drawings

The invention will be further described with reference to the accompanying drawings and examples, in which:

FIG. 1 is a schematic view of a portion of a core for an electric machine according to some embodiments of the present invention

FIG. 2 is a schematic diagram of a positioning body and an iron core unit of a jig for applying powder to an electrostatic machine for an iron core of a motor according to some embodiments of the present invention;

fig. 3 is a schematic structural view of an end face of a positioning main body of a jig for powder coating of an electrostatic machine for motor iron cores according to some embodiments of the present invention;

fig. 4 is a schematic structural view of another end surface of the positioning main body of the jig for applying powder to the motor core electrostatic machine according to some embodiments of the present invention;

figure 5 is a cross-sectional view of a positioning body of a jig for electrostatic coating of a motor core in accordance with some embodiments of the present invention;

figure 6 is a side view of a first positioning block of a powder coating jig for an electrostatic machine for motor cores according to some embodiments of the present invention;

fig. 7 is a side view of a second positioning block of a jig for electrostatic painting of a motor core according to some embodiments of the present invention;

fig. 8 is a schematic diagram illustrating a state where a positioning body, a positioning sleeve and an iron core unit of a jig for applying powder to an electrostatic machine for an iron core of a motor according to some embodiments of the present invention are engaged;

FIG. 9 is a side view of a locating sleeve of a powder coating jig for an electrostatic machine for motor cores in accordance with certain embodiments of the present invention;

fig. 10 is a schematic structural view of a first clamping rod of a powder coating jig for an electrostatic motor core according to some embodiments of the present invention;

fig. 11 is a schematic structural view of a second clamping rod of a powder coating jig for an electrostatic machine for motor cores according to some embodiments of the present invention.

Detailed Description

For a more clear understanding of the technical features, objects and effects of the present invention, embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

Fig. 1 to 11 show a preferred embodiment of the powder coating jig for the motor iron core electrostatic machine of the invention. The jig for coating the powder on the motor iron core electrostatic machine can be used for the motor iron core with internal teeth. By adopting the jig for coating the powder on the motor iron core electrostatic machine, the contact surface of the motor iron core and the coil winding is exposed, so that the electrostatic machine can conveniently coat the powder on the iron core unit, the powder coating process of the motor iron core with the internal teeth is simplified, and the powder coating efficiency and the powder coating precision are improved.

As shown in fig. 1, the motor core includes a ring-shaped core body; the annular iron core body can be formed by splicing a plurality of iron core units 21, and each iron core unit 21 comprises a yoke part 211 and a tooth part 212; the outer surface of the yoke portion 211 may be used to form the outer circumferential surface of the annular core body. The yoke portion 211 may be spliced with the yoke portion 211 of another core unit 21. One side wall of each yoke portion 211 can be provided with a first protruding portion 2111, the other side wall opposite to the side wall can be provided with a first engaging groove 2112, one side of the yoke portion 211 of the iron core unit 21, which is provided with the first protruding portion 2111, can be spliced with one side of the yoke portion of the other iron core unit 21, which is provided with the first engaging groove 2112, one side of the yoke portion 211 of the iron core unit 21, which is provided with the first engaging groove 2112, can be spliced with one side of the yoke portion 211 of the other iron core unit 21, which is provided with the first protruding portion 2111, and the iron core units 21 can be sequentially spliced in such a splicing manner to form an annular. The teeth 22 may be extended radially from the yoke portion 211, which may be used to form internal teeth of the annular core body. The coil winding of the motor can be sleeved on the tooth part 22, and the outer side wall of the tooth part 22 and the surface of the yoke part 21 connected with the tooth part 22 can form contact surfaces, namely the surface needing coating.

As shown in fig. 2 to 11, the jig may include a positioning assembly and a clamping assembly; the positioning assembly can be used for positioning the iron core unit 21 so as to facilitate the powder coating. In some embodiments, the positioning assembly may include a positioning body 11, a first positioning block 12, a second positioning block 13, and a positioning sleeve 14; the positioning body 11 can be used to position the iron core unit 21, and the first positioning block 12 and the second positioning block 13 are respectively disposed at two ends of the positioning body 11, and can be used to fix the iron core unit 21 and the positioning body in the axial direction, so as to prevent the iron core unit 21 from coming off the positioning groove 111 in the axial direction. The positioning sleeve 14 can be sleeved on the periphery of the positioning main body 11, and can be used for positioning the positioning main body 11 and the iron core unit 21. It is understood that in other embodiments, the first positioning block 12, the second positioning block 13 and the positioning sleeve 14 can be omitted. The clamping components are positioned at two ends of the positioning component and can be used for clamping and fixing the positioning component, so that the positioning component can be conveniently placed on the conveying mechanism of the electrostatic machine.

As shown in fig. 2 to 5, further, in some embodiments, the positioning body 11 may be a cylindrical body, and the cross-sectional shape thereof may be similar to a quincunx shape, and it may be made of a metal material, specifically, it may be made of copper, copper alloy, iron, and the like, and in this embodiment, it is made of copper. It is understood that in other embodiments, the positioning body 11 may not be limited to a cylindrical body, but may have other shapes, and the shape of the cross section may not be limited to a quincunx shape.

At least one positioning groove 111 can be formed on the outer side wall of the positioning body 11; the at least one positioning slot 111 may be one or more positioning slots 111, and the positioning slot 111 may be used for clamping the yoke portion 211 of the core unit 21 so that the tooth portion 212 radially protrudes from the outer side wall of the positioning body 11, so that the surface of the positioning slot 111 connected with the coil winding is exposed, thereby facilitating the powder coating and improving the powder coating accuracy; in this embodiment, there may be a plurality of positioning grooves 111; the positioning grooves 111 are spaced along the outer side wall of the positioning body 11, and are formed by the inner concave of the outer side wall of the positioning body 11, each positioning groove 111 can extend along the axial direction of the positioning body 11, and the positioning grooves 111 can be strip-shaped grooves. In this embodiment, the positioning grooves 111 may be disposed corresponding to the core units 11, and it should be understood that in other embodiments, several core units 21 may be disposed in parallel in an axial direction in one positioning groove 111.

The shape and size of the positioning groove 111 may be adapted to the shape and size of the yoke portion 211 of the core unit 21. In some embodiments, the yoke 211 may have an arc-shaped cross section, and accordingly, the positioning groove 111 may have an arc-shaped cross section, and it is understood that in other embodiments, the cross-sectional shape of the yoke 211 may not be limited to an arc. The width of the positioning groove 111 may be equivalent to that of the yoke 211 to fix the yoke 211; the depth of the positioning groove 111 may be greater than or equal to the thickness of the yoke 211, so that the side wall and the outer circumferential surface of the yoke 211 are disposed in the positioning groove 111, and the surface of the yoke 211 contacting the tooth 212 may be exposed. In some embodiments, the length of the positioning slot 111 may be greater than or equal to the length of the yoke 211 to avoid exposing the surface of the yoke 211 that does not require dusting.

In some embodiments, a second locking groove 1112 may be formed on one side wall of the positioning groove 111, and a second locking protrusion 1111 may be formed on the other side wall opposite to the side wall to correspond to the first locking protrusion 2111 and the first locking groove 2112 of the yoke 211. The first protrusion 2111 of the yoke 211 can be engaged with the second protrusion 1112 on the sidewall of the positioning slot 111, and the first slot 2112 of the yoke 211 can be disposed corresponding to the second protrusion 1111 on the sidewall of the positioning slot 111, so that the protrusion on the positioning slot 111 can be engaged with the first protrusion, thereby fixing the core unit 21 in the positioning slot 111.

In some embodiments, the positioning body 11 is further provided with a through hole 112; the through hole 112 is disposed through the positioning body 11 along the axial direction, and can be used to cooperate with the clamping assembly, so as to facilitate the installation of the positioning body 11.

In some embodiments, the positioning body 11 is further provided with a plurality of screw holes 113; the screw holes 113 are disposed at intervals around the through hole 112 for bolts to pass through, so as to connect and fix the positioning body 11 with the first positioning block 12 and the second positioning block 13. It will be appreciated that in other embodiments, the threaded hole 113 may be omitted.

As shown in fig. 6, the first positioning block 12 can be made of plastic, teflon, metal, etc. In this embodiment, it may be made of teflon. In some embodiments, it may be disposed at one end of the positioning body 11, and it may be detachably connected to the positioning body 11, and in this embodiment, it may be connected to the positioning body 11 by a bolt. In some embodiments, the shape and size of the first positioning block 12 can be adapted to the shape and size of the positioning body 11. Specifically, the cross section of the first positioning block 12 may have a shape similar to a plum blossom shape, and the size of the cross section may be equivalent to the size of the positioning body 11, and it is understood that in other embodiments, the size of the cross section may be larger than the size of the positioning body 11. The first positioning block 12 is provided with a first through hole 121, and the first through hole 121 is disposed corresponding to the through hole 112 so as to communicate with the through hole 112. The first positioning block 12 is further provided with a plurality of yielding holes 122, the yielding holes 122 are circumferentially spaced along the first through hole 121 and are correspondingly disposed with the screw holes 113 so as to communicate with the screw holes 113 for bolts to penetrate.

As shown in fig. 7, the second positioning block 13 may be made of plastic, teflon, metal, or the like. In this embodiment, it may be made of teflon. In some embodiments, it may be disposed at the other end of the positioning main body 11, and it may be detachably connected to the positioning main body 11, and in this embodiment, it may be connected to the positioning main body 11 by a bolt. In some embodiments, the shape and size of the second positioning block 13 can be adapted to the shape and size of the positioning body 11. Specifically, the cross-sectional shape of the second positioning block 13 may be similar to a plum blossom shape, and the size thereof may be equivalent to the size of the positioning body 11, and it can be understood that in other embodiments, the size thereof may also be larger than the size of the positioning body 11, so as to prevent the iron core unit 21 from falling off. The second positioning block 13 is provided with a first through hole 131, and the first through hole 131 is disposed corresponding to the through hole 112 to communicate with the through hole 112. In some embodiments, a plurality of screw grooves (not shown) may be formed on the second positioning block 13 to correspond to the screw holes 113 for screwing bolts. The second positioning block 13 can be matched with the first positioning block 12 and fixed at two ends of the positioning body 11, so as to fix the iron core unit 21.

As shown in fig. 8 and 9, in some embodiments, the positioning sleeve 14 may be ring-shaped, and may be disposed around the positioning body 11 and the core unit 21 for fixing the core unit 21. The locating sleeve may include an annular body; the radius of the ring-shaped body can be matched with the sum of the radius of the side of the positioning body 11 provided with the positioning groove 111 and the radial length of the iron core unit 21. And the positioning sleeve 14 is detachably connected with the positioning main body 11 and the iron core unit 21, so as to be convenient for disassembly and assembly. The locating sleeve 14 can be made of plastic, teflon, metal and other materials. In this embodiment, it may be made of teflon. In some embodiments of the present invention, the,

in some embodiments, the locating sleeve 14 may further include a limit boss 141; the limiting bosses 141 can be disposed on the annular main body, and can be protruded along the inner sidewall of the positioning sleeve 14, and the number of the limiting bosses corresponds to the number of the teeth 212 of the core unit 21, and the positions and the number of the limiting bosses correspond to the positions and the number of the positioning slots 111. The limiting boss 141 can abut against the tooth portion 212 to prevent the iron core unit 21 from falling off, and its inner surface can cover the outer end face of the tooth portion 212 of the iron core unit 21 to prevent the inner surface from being coated with powder, and can limit the iron core unit from falling off the positioning slot 111 in the radial direction. In some embodiments, the height of the limit boss 141 may be adapted to the height of the tooth portion 212 so as to shield the outer end face of the tooth portion 212.

Further, as shown in fig. 10 and 11, the clamping assembly may include a first clamping bar 151 and a second clamping bar 152; the first clamping rod 151 and the second clamping rod 152 can cooperate with each other to clamp the positioning assembly. The first clamping rod 151 and the second clamping rod 152 can be detachably connected, and in this embodiment, they can be screwed, but it is understood that in other embodiments, they can also be clamped.

The first clamping rod 151 may be made of a metal material, and in some embodiments, may be a copper rod, and it should be understood that in other embodiments, it may not be limited to be made of copper, and it may also be made of iron or other metals. The first clamping bar 151 may include a first cylinder 1511; one end of the first column 1511 may be provided with a screw hole 1512 extending towards the other end; the screw hole 1512 may be used to connect with the second clamping rod 151.

The second clamping bar 152 may be made of a metal material, and in some embodiments, it may be a copper bar, and it will be understood that in other embodiments, it may not be limited to copper, and it may also be made of iron or other metals. The second clamping bar 152 may include a second post 1521, a stud 1522, and a position-limiting flange 1523; the screw 1522 can be disposed at one end of the second column 1521 and can be screwed with the screw hole 1512 of the first clamping rod 151 through the through hole 112. The length of the stud 1522 may be adapted to the depth of the threaded hole 1512. The limiting flange 1523 is disposed between the stud 1522 and the second column 1521, disposed along the circumferential direction of the second column 1521, and has a diameter smaller than that of the second column 1521 and larger than that of the stud 1522, so as to be adapted to the diameter of the through hole 112. When in use, the positioning main body 11 can be sleeved on the limiting flange 1523 and limited by the limiting flange 1523.

The tool for coating the powder on the motor iron core electrostatic machine has the advantages of simple operation, high powder coating efficiency and high powder coating precision, and comprises the following steps:

s1, providing a positioning body 11, and correspondingly inserting the yoke portion 211 of the core unit 21 of the motor core into the positioning groove 111 of the positioning body 11, so that the tooth portion 212 of the core unit 21 protrudes from the outer side wall of the positioning body 11 along the radial direction.

Specifically, the yoke parts 211 of the core unit 21 are respectively clamped into the positioning slots 111, so that the side walls of the tooth parts 212 of the core unit 21 are exposed and the surfaces of the yoke parts 211, which are connected with the tooth parts 212, are exposed, and then the first positioning block 12 and the second positioning block 13 are provided; placing the first positioning block 12 and the second positioning block 13 at two ends of the positioning body 11 to clamp and fix the yoke portion 211 of the iron core unit 21, and using bolts to penetrate through the yielding hole 122 of the first positioning block 12 and the screw hole of the positioning body 11 to be screwed with the threaded groove on the second positioning block 13; the positioning sleeve 14 is sleeved on the yoke portion 211 and the periphery of the positioning body 11, so that the limiting boss 141 of the positioning sleeve 14 abuts against the outer end face of the tooth portion 212 to shield the outer end face of the tooth portion 212.

S2, providing a clamping assembly, and screwing the stud 1522 of the second clamping rod 152 of the clamping assembly through the positioning body 11 and the screw hole 1512 of the first clamping rod 151 to form an assembly.

Specifically, the stud 1522 of the second clamping rod 152 sequentially penetrates through the through hole 121 of the first positioning block 12, the through hole 111 of the positioning body 11, and the through hole 132 of the second positioning block 13, and is screwed with the screw hole 1512 of the second clamping rod 151, so that the positioning body 11 is sleeved on the periphery of the limiting boss 1523 to form an assembly.

And S3, placing the assembly formed in the step S2 on an electrostatic machine for coating powder.

Specifically, the first clamping rod 151 and the second clamping rod 152 of the assembly are respectively placed on two screws arranged at intervals of a conveying mechanism of the electrostatic machine, the screws are driven by a motor to rotate, the assembly penetrates into a powder coating area of the electrostatic machine, and the surface of the yoke portion 211, which is connected with the tooth portion 212, and the outer side wall of the tooth portion 212 are coated with powder through spraying to form an insulating powder layer.

The motor iron core can be used for a motor and has the advantages of high yield and long service life.

The motor iron core comprises an annular iron core body; the annular iron core body can be formed by splicing a plurality of iron core units 21, and each iron core unit 21 comprises a yoke part 211, a tooth part 212 and an insulating powder layer; the outer surface of the yoke portion 211 may be used to form the outer circumferential surface of the annular core body. The yoke portion 211 may be spliced with the yoke portion 211 of another core unit 21. One side wall of each yoke part 211 can be provided with a clamping protrusion, the other side wall can be provided with a clamping groove, one side of the yoke part 211 of the iron core unit 21, which is provided with the clamping protrusion, can be spliced with one side of the yoke part of the other iron core unit 21, one side of the yoke part 211 of the iron core unit 21, which is provided with the clamping groove, can be spliced with one side of the yoke part 211 of the other iron core unit 21, which is provided with the clamping groove, and the plurality of iron core units 21 can be sequentially spliced according to the splicing mode to form an. The teeth 22 may be extended radially from the yoke portion 211, which may be used to form internal teeth of the annular core body. The insulating powder layer can be formed by applying powder by the motor iron core electrostatic machine powder applying method, can be arranged on the outer side wall of the tooth part 22 and the surface of the yoke part 21 connected with the tooth part 22, and can be used for insulating the coil winding and the iron core unit 21.

It is to be understood that the foregoing examples, while indicating the preferred embodiments of the invention, are given by way of illustration and description, and are not to be construed as limiting the scope of the invention; it should be noted that, for those skilled in the art, the above technical features can be freely combined, and several changes and modifications can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention; therefore, all equivalent changes and modifications made within the scope of the claims of the present invention should be covered by the claims of the present invention.