CN216134334U

CN216134334U - A skeleton subassembly and polar claw formula motor for polar claw formula motor

Info

Publication number: CN216134334U
Application number: CN202122679191.7U
Authority: CN
Inventors: 王富冈; 陶伟
Original assignee: Jiangsu Leili Motor Co Ltd
Current assignee: Jiangsu Leili Motor Co Ltd
Priority date: 2021-11-03
Filing date: 2021-11-03
Publication date: 2022-03-25
Anticipated expiration: 2031-11-03

Abstract

A skeleton assembly for a claw pole motor and a claw pole motor are disclosed. The skeleton subassembly includes: the middle pole plate assembly comprises an upper middle pole plate and a lower middle pole plate which are stacked together, the upper middle pole plate is provided with an upper middle pole plate body and a plurality of pole claws axially extending from the upper middle pole plate body in the direction departing from the lower middle pole plate, and the lower middle pole plate is provided with a lower middle pole plate body and a plurality of pole claws axially extending from the lower middle pole plate body in the direction departing from the upper middle pole plate; the first skeleton portion and the second skeleton portion are formed on two axial sides of the middle pole plate assembly respectively, the first skeleton portion comprises an upper wall, a lower wall and a side wall extending between the upper wall and the lower wall, the skeleton assembly comprises a plurality of first ejection portions arranged on the upper wall of the first skeleton portion, and the first ejection portions are arranged near the inner periphery of the upper wall surrounding the rotor cavity. The claw type motor includes: a housing assembly; skeleton subassembly and rotor shaft subassembly.

Description

A skeleton subassembly and polar claw formula motor for polar claw formula motor

Technical Field

The utility model relates to a skeleton assembly for a claw type motor and a claw type motor comprising the skeleton assembly.

Background

A claw-pole motor, such as a claw-pole stepping motor, is a micro motor widely applied to the field of smart homes such as household appliances. The claw-pole motor mainly includes: casing subassembly, rotor subassembly, skeleton subassembly, last polar plate subassembly, gear assembly, output shaft subassembly, apron subassembly. The framework assembly is installed in the shell assembly, and the rotor assembly is installed in a rotor cavity of the framework assembly and matched with a middle shaft of the shell assembly. The upper polar plate assembly is arranged on the framework assembly, and the gear assembly and the output shaft assembly are arranged on the upper polar plate assembly. The cover plate assembly is mounted on the housing assembly.

Along with the improvement of the life quality of people, the market reject ratio requirement of household appliance products in the field of intelligent home on micro-motor part products is further improved. The market feedback reject ratio of the existing claw-pole motor is controlled to be about 10ppm, but the strict requirement of special customers cannot be met. A few customers even pursue zero-bad. The most major disadvantages of the claw-pole motor are as follows: motor noise, operation card are dead bad and skeleton subassembly wire winding is bad.

The framework component comprises a middle polar plate component (the middle polar plate component comprises an upper middle polar plate and a lower middle polar plate) and a framework, and the two components are in two structural forms of split assembly and injection molding integration. In the process of adopting the injection molding integrated structure, the upper middle polar plate and the lower middle polar plate are firstly overlapped to form the middle polar plate assembly, then the assembly is placed in an injection molding cavity, the middle polar plate assembly is positioned through a mold, and then the framework assembly is formed through injection molding. The existing positioning mode has the following problems: the middle polar plate component is radially positioned with the mold core through the rotor cavity with the polar claws. In order to smoothly match the mold, clearance fit is needed between the mold core and the polar claws, so that after part of products are subjected to injection molding, the polar claws on the inner wall of the rotor cavity are covered with injection molding materials. Even if the pole claws are not completely covered with the injection molding material, the injection molding material is easy to generate flash at the moment. The polar claw is covered with the injection molding material or has the skeleton subassembly of injection molding material overlap easily after assembling into the whole machine and take place the friction with the rotor in the rotor chamber, and the motor is at the overlap plastics bits of skeleton subassembly after long-time operation and can drop to the rotor surface, causes motor noise and operation card to die unusually.

The problem of poor winding of the framework component mainly comes from: in the prior art, when the framework assembly is used for injection molding, the notches on the two sides of the outer circle of the middle pole plate assembly are used for circumferential and axial positioning. The positioning can cause the excircle on two sides of the middle pole plate component to lack a part, so that the radial space of the winding slot is reduced, and the slot fullness rate of the framework component after winding is high, thereby causing the risk of breakdown. Meanwhile, the wall thickness of the framework component is thin, the outer circumference of the framework component is incomplete, the framework component is provided with a notch, injection molding burrs are prone to occurring, the framework component cannot wind wires or the phenomena of wire hanging, wire breaking and the like occur in the process of material circulation due to the fact that pressure deformation occurs, and the problem of poor winding of the framework component is caused.

Accordingly, there is a need for an improved claw motor and bobbin assembly that overcomes at least some of the disadvantages of the prior art.

SUMMERY OF THE UTILITY MODEL

The present invention aims to overcome at least some of the above problems in the prior art.

According to one aspect of the present invention there is provided a bobbin assembly for a pole claw machine, the bobbin assembly having an axis and an inner periphery surrounding the axis and defining a rotor cavity, the bobbin assembly comprising:

a middle pole plate assembly including an upper middle pole plate and a lower middle pole plate stacked together, the upper middle pole plate having an upper middle pole plate body and a plurality of pole fingers extending axially from the upper middle pole plate body in a direction away from the lower middle pole plate, the lower middle pole plate having a lower middle pole plate body and a plurality of pole fingers extending axially from the lower middle pole plate body in a direction away from the upper middle pole plate;

a first skeleton portion and a second skeleton portion formed by injection molding together with the middle pole plate assembly, the first skeleton portion and the second skeleton portion being respectively formed on both sides of the middle pole plate assembly in an axial direction,

wherein the first skeleton portion includes an upper wall, a lower wall, and a side wall extending between the upper wall and the lower wall, the skeleton assembly includes a plurality of first lifters provided on the upper wall of the first skeleton portion, the plurality of first lifters being provided near an inner circumference of the upper wall around a rotor cavity.

According to one or more embodiments of the present invention, the terminal block further includes one or more second trims provided on an upper wall of the first skeleton portion, the skeleton assembly further includes a terminal block provided on one side of the skeleton assembly, and the second trims are provided near the terminal block.

According to one or more embodiments of the present invention, the first liftout portion is between an inner circle of the pole claws of the upper and lower middle pole plates and an outer circle of the side wall of the first skeleton portion in a radial direction.

According to one or more embodiments of the present invention, the second skeleton portion includes an upper wall, a lower wall, and a side wall extending between the upper wall and the lower wall, and each of the first topping portions further includes a topping reinforcing portion extending axially from the first topping portion between the upper wall of the first skeleton portion and the lower wall of the second skeleton portion.

According to one or more embodiments of the present invention, the plurality of first lifters are three first lifters evenly spaced in a circumferential direction.

According to one or more embodiments of the utility model, at least a part of the claws of the upper and lower middle pole plates is provided with an axial abutment portion adapted to abut against an axial abutment profile of an injection mold.

According to one or more embodiments of the present invention, the axial abutment portion is provided on a part of the evenly spaced-apart pole claws of the upper middle pole plate and/or the lower middle pole plate, and the plurality of first ejector portions are provided so as to be circumferentially spaced apart from the axial abutment portion.

According to one or more embodiments of the utility model, said axial abutment is an end face of the free end of the pole piece.

According to one or more embodiments of the utility model, one or more plastic-passing holes are respectively arranged on the upper middle polar plate and the lower middle polar plate, and the plastic-passing holes of the upper middle polar plate are respectively aligned with the plastic-passing holes of the lower middle polar plate to form one or more plastic-passing holes penetrating through the middle polar plate assembly.

According to one or more embodiments of the present invention, the second skeleton portion includes an upper wall, a lower wall, and a side wall extending between the upper wall and the lower wall, and the skeleton assembly includes an annular bead extending in an axially downward direction from an outer periphery of the lower wall of the second skeleton portion.

According to an aspect of the present invention, there is provided a claw pole motor comprising:

a housing assembly;

the framework assembly is arranged in the shell assembly and is wound with a coil;

a rotor shaft assembly mounted within the housing assembly, the rotor shaft assembly at least partially located within the rotor cavity of the skeletal assembly.

According to one or more embodiments of the utility model, the claw machine is a claw stepper machine or a claw synchronous machine.

Drawings

Fig. 1 illustrates an exploded view of a claw-pole machine according to some embodiments of the present invention;

FIG. 2A illustrates an exploded view of a middle pole plate assembly, FIG. 2B illustrates a cross-sectional view of the middle pole plate assembly, and FIG. 2C illustrates a perspective view of a bobbin assembly;

FIG. 3A shows a cross-sectional view of the carcass assembly injection molded in a mold, and FIG. 3B is an enlarged partial view taken at I in FIG. 3A;

FIG. 4 shows a prior art skeletal assembly in which the pole plate assembly has locating slots symmetrically formed on both sides of the outer periphery thereof for circumferential location with the mold;

5A-5B illustrate a lower contoured alignment core used in an injection molding process for a skeletal assembly in accordance with one or more embodiments of the present invention;

6A-6B illustrate an upper contoured alignment core used in an injection molding process for a skeletal assembly in accordance with one or more embodiments of the present invention;

FIG. 7A shows a cross-sectional view of a skeletal assembly injection molded in a mold, according to one or more embodiments of the present disclosure, and FIG. 7B is an enlarged view of a portion of FIG. 7A at II;

FIG. 8A illustrates a perspective view of a skeletal assembly, FIG. 8B illustrates a cross-sectional view taken along line A-A of FIG. 8A, and FIG. 8C is an enlarged view of a portion of FIG. 8B at III, in accordance with one or more embodiments of the present invention;

FIG. 9 illustrates a perspective view of a skeletal assembly in accordance with some embodiments of the present invention;

FIG. 10A shows a schematic view of the interfitting of the middle pole plate assembly with the upper and lower contoured shape cores, and FIG. 10B is an enlarged view of a portion of FIG. 10A at IV;

FIG. 11 illustrates a top view of an upper mid-plate of a mid-plate assembly according to some embodiments of the utility model;

FIG. 12A illustrates a top view, FIG. 12B illustrates a perspective view, and FIG. 12C illustrates a cross-sectional view of a skeletal assembly illustrating a lifter portion of the skeletal assembly and a lifter bar engaged with the skeletal assembly, in accordance with some embodiments of the present invention;

fig. 13A illustrates a perspective view, fig. 13B illustrates a cross-sectional view, and fig. 13C illustrates a cross-sectional view of a claw-pole machine according to some embodiments of the present invention;

fig. 14 illustrates a method of injection molding a bobbin assembly for a pole claw machine according to some embodiments of the present invention.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs. In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present invention and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the utility model, the axis of the claw-pole motor, the rotation axis of the rotor assembly and the axis of the framework assembly are coincident. In this context, the axis of the claw-pole machine, the axis of rotation of the rotor assembly and the axis of the bobbin assembly are used interchangeably. That is, the "axis" used in the present specification refers to the axis of the bobbin assembly, and is also the axis of the claw pole motor and the rotation axis of the rotor assembly. As used herein, "axial" or "axial direction" refers to a direction along the axis of the skeletal assembly, "radial" is a direction relative to the axis of the skeletal assembly, and refers to a direction diverging or radiating from the axis of the skeletal assembly, "circumferential" or "circumferential direction" is a direction relative to the axis of the skeletal assembly, and refers to a direction about the axis of the skeletal assembly.

Fig. 1 illustrates an exploded view of a claw-pole machine 100 according to some embodiments of the utility model. As shown, the claw-pole motor 100 includes a housing assembly 110, a rotor assembly 120, a frame assembly 200, an upper pole plate assembly 130, a gear assembly 140, an output shaft assembly 150, a cover plate assembly 160, and an outlet box assembly 170. The housing assembly 110 includes a housing body 112, a central axle 114 extending centrally from the bottom of the housing body 112, and a spring plate 116. The rotor assembly 120 is mounted on the central shaft 114 of the housing assembly 110. The backbone assembly 200 is mounted within the chassis assembly 110 such that the rotor assembly 120 mounted on the central shaft 114 is located within the rotor cavity of the backbone assembly 200. The upper plate assembly 130 is mounted on the frame assembly 200. A gear assembly 140 and an output shaft assembly 150 are mounted on the upper plate assembly 130. The outlet box assembly 170 includes an outlet box body 172 and an outlet box cover 174. The outlet box assembly 170 is mounted on the frame assembly 200. The cover plate assembly 160 is mounted to the housing assembly 110 to mount and enclose the rotor assembly 120, the frame assembly 200, the upper plate assembly 130, the gear assembly 140, the output shaft assembly 150, and the outlet box assembly 170 within a chamber defined by the housing assembly 110 and the cover plate assembly 160.

The skeletal assembly 200 is an injection molded unitary structure formed by an injection molding process. In the injection molding process of the framework component 200, the upper middle polar plate 210 and the lower middle polar plate 230 are overlapped to form a middle polar plate component, then the middle polar plate component is placed in an injection mold cavity, the middle polar plate component is positioned through a mold, and then the framework component is formed through injection molding. Fig. 2A shows an exploded view of the upper and lower

middle pole plates

210 and 230 of the middle pole plate assembly, fig. 2B shows a cross-sectional view of the middle pole plate assembly including the upper and lower

middle pole plates

210 and 230 stacked together, and fig. 2C shows a perspective view of the bobbin assembly 200.

As shown in fig. 2A, the upper middle pole plate 210 includes an upper middle pole plate body 212 and a plurality of pole fingers 220. The upper middle pole plate body 212 has an inner periphery defining a central aperture. A plurality of pole fingers 220 extend in an axially upward direction from an inner periphery of the upper center pole plate body 212. The lower middle pole plate 230 includes a lower middle pole plate body 232 and a plurality of pole fingers 240. The lower middle plate body 232 has an inner periphery defining a central aperture. A plurality of pole claws 240 extend in an axially downward direction from the inner periphery of the lower intermediate plate body 232. The lower middle plate body 232 is provided with a plurality of (two in the figure) superimposed positioning posts 234 extending upward, and the upper middle plate body 212 is correspondingly provided with the same number of superimposed positioning holes 214. The upper middle plate body 212 is provided with a plurality (two in the figure) of downwardly extending superimposed positioning posts 216, and the lower middle plate body 232 is correspondingly provided with the same number of superimposed positioning holes 236. When the upper middle plate body 212 and the lower middle plate body 232 are stacked together, the stacked positioning columns 234 of the lower middle plate body 232 are clamped into the stacked positioning holes 214 of the upper middle plate body 212, and simultaneously, the stacked positioning columns 216 of the upper middle plate body 212 are clamped into the stacked positioning holes 236 of the lower middle plate body 232, so that the upper middle plate body 212 and the lower middle plate body 232 are clamped and connected together, as shown in fig. 2B. The upper middle plate body 212 and the lower middle plate body 232 are also each provided with a plurality (two in the figure) of

over-molding holes

218, 238. In some embodiments according to the utility model, the upper and lower middle

pole plate bodies

212, 232 are formed from steel plate.

The bobbin assembly 200 is an injection molded unitary structure formed on a middle pole plate assembly (including an upper middle pole plate 210 and a lower middle pole plate 230 that are laminated together) by an injection molding process. As shown in fig. 2C, the skeleton assembly 200 includes a middle pole plate assembly, and an upper skeleton portion (also referred to as a first skeleton portion) 250 above the middle pole plate assembly and a lower skeleton portion (also referred to as a second skeleton portion) 260 below the middle pole plate assembly. Upper skeleton portion 250 includes an upper skeleton portion wall 252, an upper skeleton portion lower wall 254, and a substantially cylindrical side wall 256 between upper skeleton portion wall 252 and upper skeleton portion lower wall 254 and connecting upper skeleton portion wall 252 and upper skeleton portion lower wall 254. An upper skeleton portion upper wall 252, an upper skeleton portion lower wall 254 and a generally cylindrical side wall 256 define an annular groove for receiving a coil. The lower skeleton portion 260 includes a lower skeleton portion upper wall 262, a lower skeleton portion lower wall 264, and a substantially cylindrical side wall 266 that connects the lower skeleton portion upper wall 262 and the lower skeleton portion lower wall 264 between the lower skeleton portion upper wall 262 and the lower skeleton portion lower wall 264. The lower armature portion upper wall 262, lower armature portion lower wall 264 and generally cylindrical side wall 266 define an annular groove for receiving the coil. The backbone assembly 200 also includes a central axis x and a rotor cavity 280. The backbone assembly 200 also includes a terminal block 270.

When the existing skeleton assembly is subjected to injection molding, the middle pole plate assembly is firstly placed into a mold, and injection molding is carried out after positioning through the mold. Wherein, well polar plate subassembly's locate mode as follows: the middle polar plate assembly is radially positioned with the mold core of the mold through the rotor cavity with the polar claws, the middle polar plate assembly is circumferentially positioned with the mold through positioning grooves symmetrically formed in two sides of the outer circle of the middle polar plate assembly, and the outermost edge of the middle polar plate is pressed through the left half closing module and the right half closing module to be axially positioned.

The existing skeleton assembly has the following problems: after part of products are subjected to injection molding, the pole claws on the inner wall of the rotor cavity are covered with injection molding materials; in addition, although the pole claws of part of products are not covered or are completely covered with the injection molding material, the injection molding material is easy to form flash. In the claw pole type motor of equipment, the injection molding material that covers on the claw and the injection molding material overlap that forms easily take place the friction with the rotor in the rotor chamber, and claw pole type motor operation back flash plastic bits of skeleton subassembly can drop to the rotor surface for a long time, cause motor noise and operation card to die unusually.

The problem of the claw covered with the injection molding material or the flash of the injection molding material is generally considered by those skilled in the art to be caused by the gap between the mold core and the claw. Specifically, in the injection molding process of the framework assembly, the middle pole plate assembly is radially positioned with the mold core through the rotor cavity with the pole claws. In order to achieve smooth mold clamping, clearance fit is usually adopted between the mold core and the pole claw. The person skilled in the art generally considers that the clearance between the mould core and the pole piece is the source of the covering of the pole piece with the injection moulding material or the formation of flash of the injection moulding material. Therefore, the existing injection molding process controls the clearance between the mold core and the polar claw as accurately as possible by improving the precision of the mold core of the mold so as to avoid the problems that the polar claw is covered with injection molding materials or injection molding material fins and the like. However, no matter how to improve the precision of the mold core of the mold, the existing injection molding process still cannot completely solve the problems that the polar claw is covered with the injection molding material or the injection molding material is flapped and the like.

The inventors of the present invention have conducted extensive studies and found that at least some of the problems of covering the injection molding material or flashing of the injection molding material are not caused by insufficient accuracy of the core of the mold but by deformation of the middle plate due to the injection pressure during the injection molding process. Fig. 3A is a cross-sectional view of the skeleton assembly injection molded in a mold, and fig. 3B is a partial enlarged view at I in fig. 3A, showing how the injection pressure during injection molding causes the problem of the polar claw covering the injection molding material or the flash of the injection molding material.

The mold shown in FIG. 3A includes an upper profiling positioning core 530, a lower profiling positioning core 510, a mold core 550, a left half mold block 560, and a right half mold block 570. The middle plate assembly (comprising upper middle plate 410 and lower middle plate 430) is positioned in mold cavity 504 defined by upper contoured positioning core 530, lower contoured positioning core 510, mold core 550, left half mold block 560, and right half mold block 570. During injection molding, injection molding compound is injected into mold cavity 504 through injection port 502 to form, along with the center pole plate assembly in mold cavity 504, a skeletal assembly of an injection molded unitary construction.

When injection molding, the injection pressure F may impinge on the upper and lower

middle pole plates

410 and 430 of the middle pole plate assembly. Since the upper middle pole plate 410 and the lower middle pole plate 430 are thin-walled members, the upper middle pole plate 410 and the lower middle pole plate 430 are deformed when subjected to the injection pressure F. The orientation and deformation tendency of the middle plate body of the upper middle plate 410 and the lower middle plate 430 is shown by the dashed line 402. After the upper and lower

middle pole plates

410 and 430 are deformed, the claws 420 of the upper middle pole plate 410 are spread in a radially outward direction, as shown in fig. 3B. The claws of the lower middle plate 430, which are integrally assembled with the upper middle plate 410, are deformed in a radially inward direction to clasp the mold core 550. At this time, the gap between the pole claw 420 of the upper middle pole plate 410 and the mold core 550 is large. There is a tendency for the injection molding compound to enter during the injection molding process, so that the claws 420 of the upper middle pole plate 410 will produce an over-molded compound after the injection molding process is completed. Meanwhile, the claws of the lower middle pole plate 430 may deform in the radially inward direction to clasp the mold core 550, thereby increasing the difficulty of demolding.

Fig. 4 shows a prior art bobbin assembly 400 in which positioning grooves 404 are symmetrically formed on both sides of the outer circumference of the pole plate assembly for positioning with a mold in the circumferential direction. Due to the positioning groove 404, when the bobbin assembly 400 is wound, the full space ratio of the winding groove is high due to the large resistance of the motor winding or the thick wire diameter of the winding enameled wire. The high slot filling rate can cause the enameled wire to have the risk of being punctured, finally causes the dead unusual and cost-push of operation card.

The framework component adopts a novel positioning structure during injection molding, so that a novel injection molding framework component is formed, and the technical problem that the polar claws are covered with injection molding materials or injection molding material fins and/or the technical problem of high groove filling rate is solved.

In some embodiments of the utility model, the upper and lower contoured shape cores are used to radially position the center pole plate assembly during injection molding of the frame assembly. Specifically, the free ends of the claws of the upper and/or lower middle pole plates are provided with radial abutting parts which abut against corresponding surfaces of the mold during injection molding, so that the claws of the upper and/or lower middle pole plates are prevented from being deformed in the radial direction during injection molding. In one or more embodiments according to the utility model, the radial abutment is an inclined surface, on the side facing away from the rotor chamber, connected to the end face of the free end of the pole piece. Radial abutting copying parts (inclined surfaces abutting against the radial abutting parts of the polar claws in the embodiment) matched with the radial abutting parts of the polar claws are arranged at corresponding positions on the upper copying positioning core and/or the lower copying positioning core of the die. Radial butt joint portions of pole claws of the upper middle pole plate and/or the lower middle pole plate are in butt joint with radial butt joint profiling portions corresponding to the positioning profiling cores, and the radial positioning of the middle pole plate assembly can be realized by matching the positioning of the die cores on the inner sides of the rotor cavities.

In some embodiments according to the utility model, the claws of the upper and lower middle pole plates are provided with radial abutments. In other embodiments according to the utility model, only the claws of the upper middle plate (i.e. the middle plate that is remote from the feed opening during injection molding) are provided with radial abutments. In some embodiments according to the utility model, each of the prongs of the upper and/or lower central pole plate is provided with a radial abutment. In other embodiments according to the utility model, the radial abutments are provided on some of the prongs of the central plate, for example on some of the prongs that are evenly spaced apart.

Through set up radial butt portion on the utmost point claw of last well polar plate and/or lower well polar plate, through its radial butt profile modeling portion butt that corresponds on with the shape core of location, the location of cooperation mould core to the rotor cavity inboard can realize the reliable radial positioning of well polar plate subassembly in the die cavity. In the injection molding process, the injection port can only be arranged on the fixed die, namely one axial end of the framework component, so that the surface, which is perpendicular to the axis and is in contact with the middle polar plate of the injection molding material at first, is subjected to hydraulic impact along with injection molding material high pressure injection in the injection molding process, and axial micro-deformation is generated. This axial micro-deformation in turn causes the deformation of at least one side of the pole claw of the middle pole plate assembly in a radial direction of the enlargement of the rotor cavity. At this time, the radial abutting copying part (copying oblique angle of the copying positioning core) corresponding to the positioning core of the utility model abuts against the radial abutting part of the polar claws of the middle polar plate and is not opened outwards. Therefore, the radial abutting part of the utility model not only prevents the middle pole plate component from deforming in the injection molding process, but also solves the problem of pole claw leakage in the injection molding process of the prior skeleton component, can effectively avoid the abnormal problems of motor noise and operation blocking, and reliably improves the quality of the motor.

In some embodiments of the present invention, the upper and lower contoured shape cores are also used to axially position the center pole plate assembly during injection molding of the frame assembly. In particular, the free ends of the claws of the upper and/or lower middle pole plates are provided with axial abutments which abut against corresponding faces of the mould during injection moulding, so that the claws of the upper and/or lower middle pole plates are prevented from moving in the axial direction during injection moulding and thus the middle pole plate assembly is prevented from moving in the axial direction. In one or more embodiments according to the utility model, the axial abutment is an end face with the free end of the pole piece. The upper profile positioning core and/or the lower profile positioning core of the die are provided with axial abutting profile parts (in the embodiment, surfaces abutting against the axial abutting parts of the polar claws) which are matched with the axial abutting parts of the polar claws at corresponding positions. The axial abutting parts (in some embodiments, the free end faces of the polar claws) of the polar claws of the upper middle polar plate and/or the lower middle polar plate are abutted with the positioning cores, so that the axial positioning of the middle polar plate assembly in the injection molding process can be realized.

In some embodiments according to the present invention, the axial abutment may be used in combination with the radial abutment, i.e. the claws of the upper and/or lower middle pole plate may be provided with both the radial abutment and the axial abutment. In some embodiments, the axial abutment and the radial abutment may be provided on the same pole or on at least partially different poles. For example, in some embodiments according to the utility model, the claws of the upper and lower middle pole plates are each provided with an axial abutment. In other embodiments according to the utility model, only the prongs of the upper or lower central pole plate are provided with axial abutments. In some embodiments according to the utility model, each of the prongs of the upper and/or lower central pole plate is provided with an axial abutment. In other embodiments according to the utility model, the axial abutments are provided on some of the prongs of the central plate, for example on some of the prongs that are evenly spaced apart.

In some embodiments of the utility model, the upper and lower contoured shape cores are used to circumferentially position the center pole plate assembly during injection molding of the frame assembly. Specifically, the vicinity of the free ends of the claws of the upper and/or lower middle pole plates is provided with a circumferential abutting part which abuts against a corresponding surface of the mold during injection molding, so that the claws of the upper and/or lower middle pole plates are prevented from moving in the circumferential direction during injection molding, and therefore the middle pole plate assembly is prevented from moving in the circumferential direction. In one or more embodiments according to the utility model, the circumferential abutment is a circumferential flank of the free end of the pole piece. Circumferential abutting copying parts (in the embodiment, surfaces abutting against the circumferential abutting parts of the polar claws) which are matched with the circumferential abutting parts of the polar claws are arranged at corresponding positions on the upper copying positioning core and/or the lower copying positioning core of the die. The circumferential abutting parts (in some embodiments, the circumferential two side faces of the free end parts of the polar claws) of the polar claws of the upper and/or lower middle polar plates are abutted with the positioning cores, so that the circumferential positioning of the middle polar plate assembly in the injection molding process can be realized.

In some embodiments according to the present invention, the circumferential abutment may be used alone, that is, only the circumferential abutment is provided on the claws of the upper and/or lower middle pole plate, and the radial abutment and/or the axial abutment are not provided. In other embodiments according to the present invention, the circumferential abutment may be used in combination with the radial abutment and/or the axial abutment, that is, the radial abutment and the circumferential abutment may be provided on the pole claws of the upper middle pole plate and/or the lower middle pole plate at the same time, or the radial abutment, the axial abutment and the circumferential abutment may be provided at the same time. In some embodiments according to the utility model, the pole claws of the upper and lower middle pole plates are each provided with a circumferential abutment. In other embodiments according to the utility model, only the prongs of the upper or lower central pole plate are provided with circumferential abutments. In some embodiments according to the utility model, a circumferential abutment is provided on each prong of the upper and/or lower middle pole plates. In other embodiments according to the utility model, the circumferential abutments are provided on some of the prongs of the central plate, for example on some of the prongs that are evenly spaced apart. In some embodiments, the circumferential abutment and the radial and/or axial abutment may be provided on the same pole or on at least partially different poles.

Fig. 5A-5B illustrate a lower contoured alignment core 310 used in the injection molding process of a skeletal assembly in accordance with one or more embodiments of the present invention. Fig. 6A-6B illustrate an upper contoured alignment core 330 used in the injection molding process of a skeletal assembly in accordance with one or more embodiments of the present invention. Fig. 7A shows a cross-sectional view of a skeletal assembly according to one or more embodiments of the present invention, injection molded in a mold, and fig. 7B is a partial enlargement at II in fig. 7A. Fig. 8A illustrates a perspective view of a skeletal assembly 200 in accordance with one or more embodiments of the present invention, fig. 8B illustrates a cross-sectional view taken along line a-a of fig. 8A, and fig. 8C is an enlarged partial view at III of fig. 8B.

As shown in fig. 5A-5B, the lower contoured positional core 310 includes a lower core body portion 312 and a core molding portion 320 extending from the lower core body portion 312. The core-forming portion 320 includes a plurality of teeth 322 that form a shape that is generally complementary to the plurality of prongs 220 of the upper center pole plate 210. The core forming portion 320 includes a radial abutment profile 324, an axial abutment profile and a circumferential abutment profile 328.

As shown in fig. 6A-6B, the upper contoured positional core 330 includes an upper core body portion 332 and a core shaping portion 340 extending from the upper core body portion 332. The core form 340 includes a plurality of teeth 342 that form a shape that is generally complementary to the plurality of prongs 240 of the lower middle plate 230. The core forming section 340 includes a radial abutment profile 344, an axial abutment profile and a circumferential abutment profile 348.

As shown in fig. 7A, the injection mold according to the present invention includes an upper profiling positioning core 330, a lower profiling positioning core 310, a mold core 350, a left half mold 360, and a right half mold 370. The middle pole plate assembly (including the upper middle pole plate 210 and the lower middle pole plate 230) is positioned in a mold cavity 304 defined by an upper contoured shape core 330, a lower contoured shape core 310, a mold core 350, a left half mold 360, and a right half mold 370. During injection molding, injection molding compound is injected into the mold cavity 304 through the injection port 302, thereby forming a skeletal assembly of an injection molded unitary construction with the center pole plate assembly in the mold cavity 304.

As is clear from fig. 7B, the radial abutment 222 on the pole finger 220 of the upper middle pole plate 210 is in the form of an inclined surface, on the side facing away from the rotor chamber, in connection with the end face of the free end of the pole finger 220. The axial abutment 224 on the pole piece 220 is in the form of an end face of the free end of the pole piece 220. The radially abutting contours 324 on the lower contoured locator core 310 are in the form of ramps 324 formed on the bottom of the groove between adjacent teeth 322 of the core profile 320. The axial abutment contours 326 on the lower contoured locator core 310 are in the form of flats 326 formed on the bottom of the slot between adjacent teeth 322 of the core profile 320. As shown, when the middle pole plate assembly is positioned in the mold cavity 304, the radial abutment 222 on the pole finger 220 abuts the radial abutment profile 324 on the lower profile positioning core 310 and the axial abutment 224 abuts the axial abutment profile 326 with no or substantially no gap therebetween. Such a gapless abutment enables a reliable radial and axial positioning of the middle pole plate assembly in the mold cavity.

In addition, due to the gapless abutment between the radial abutment portion 222 on the pole piece 220 and the radial abutment profile portion 324 on the lower profile positioning core 310, the splaying of the pole piece 220 in the radial outward direction, for example, under the injection pressure F as shown in fig. 3A and 3B, can be completely eliminated. Therefore, the radial abutting part of the utility model not only prevents the middle pole plate from deforming in the injection molding process, but also solves the problem of leakage of the pole claw in the injection molding process of the prior skeleton assembly. This in turn can effectively avoid motor noise and the dead unusual problem of operation card, has improved the quality of motor reliably.

Fig. 8A illustrates a perspective view of a skeletal assembly 200 in accordance with one or more embodiments of the present invention, fig. 8B illustrates a cross-sectional view taken along line a-a of fig. 8A, and fig. 8C is an enlarged partial view at III of fig. 8B. As shown in fig. 8B, the radial thickness of the end of the pole is B, the axial height of the pole is c, the radial thickness of the pole is d, the axial height of the circumferential abutment (the axial distance between the end of the pole and the lower end of the circumferential abutment) is e, the circumferential width of the bottom of the pole is f, and the axial height of the radial abutment (slope) of the pole is h. In one or more embodiments according to the utility model, the axial height h of the radial abutment (ramp) of the claw is about 1/3-1/2 of the axial height c of the claw and the radial thickness b of the end of the claw is about 1/2 of the radial thickness d of the claw. In one or more embodiments, the axial height e of the circumferential abutment is about 15% -20% of the axial height c of the pole piece. These dimensions or dimensional ratios enable the advantageous technical effects of the utility model to be achieved.

Fig. 9 illustrates a perspective view of the backbone assembly 200, showing the circumferential abutment 228, according to some embodiments of the present invention. Fig. 10A shows a schematic view of the interfitting of the middle pole plate assembly with the upper contoured locator core 330 and the lower contoured locator core 310, and fig. 10B is an enlarged view of a portion of fig. 10A at IV.

As best shown in fig. 10B, the circumferential abutment portions 228 on the plurality of tabs 220 of the upper middle pole plate 210 are in the form of circumferential side surfaces 228 of the free end portions of the tabs 220. The circumferential abutment profile 328 on the lower profile locating shaped core 310 is in the form of a circumferential flank 328 formed in the vicinity of the tooth root of the adjacent tooth 322 of the shaped core formation 320. As shown, when the middle pole plate assembly is positioned in the mold cavity of the mold, the circumferential abutment 228 on the pole finger 220 abuts the circumferential abutment contour 328 on the lower contoured positioning core 310 with no gap or substantially no gap therebetween. Such a gapless abutment achieves a reliable circumferential positioning of the middle pole plate assembly in the mold cavity.

In the utility model, the circumferential positioning of the middle pole plate assembly in the mold is realized through the abutting between the circumferential abutting part on the pole claw of the middle pole plate and the circumferential abutting copying part on the copying positioning shaped core. Thus, the present invention may eliminate the detent of the prior art, such as detent 404 shown in FIG. 4. According to the utility model, the positioning groove is omitted, so that the problem of high groove fullness rate after winding of the framework component can be effectively reduced, the risk of breakdown of the enameled wire due to too short creepage distance is avoided, and the stability of the product is ensured.

Fig. 11 illustrates a top view of the upper middle pole plate 210 of the middle pole plate assembly according to some embodiments of the present invention. Referring to fig. 11 in conjunction with fig. 2A, the upper middle plate 210 and the lower middle plate 230 are each provided with two

over-molding holes

218, 238. When the upper middle plate 210 and the lower middle plate 230 are stacked together, the two molding holes 218 of the upper middle plate 210 are aligned with the two molding holes 238 of the lower middle plate 230, respectively, to form two molding holes penetrating through the middle plate assembly.

In the injection molding process of the frame assembly, the injection hole is generally provided on the upper frame portion side or the lower frame portion side. Due to poor flowability of the plastic, incomplete injection molding of the other side of the skeleton portion may occur. Currently, in order to ensure that the upper skeleton part and the lower skeleton part are integrally injection-molded, the injection pressure is increased. However, the increased injection pressure may cause excessive impact force on the plate body, which may cause or increase deformation of the middle plate.

Through setting up two and running through the hole of moulding of crossing of well polar plate subassembly, can effectively increase the flow property of injection molding material at the in-process of moulding plastics. That is, the injection molding material entering through the injection hole during the injection molding process more easily reaches the other side of the skeleton portion, thereby contributing to the complete injection molding of the upper skeleton portion and the lower skeleton portion. In addition, because two over-molding holes penetrating through the middle pole plate assembly are arranged, the injection molding pressure can be properly reduced on the premise of ensuring that the upper skeleton part and the lower skeleton part are completely injected, so that the impact force of the injection molding pressure on the pole plate body is reduced, and the deformation of the middle pole plate is reduced or avoided. In addition, after the framework assembly is formed, the upper framework part and the lower framework part can be connected together through injection molding materials in the plastic passing holes, and the structural strength of the framework assembly is enhanced.

In one or more embodiments according to the utility model, the number of the overmoulded holes is more than or equal to 2, and the diameter of each overmoulded hole is 1-5.0 mm. In an alternative embodiment, the sum of the areas of the plastic holes accounts for 2% -5% of the area of the plate body. For example, for a middle pole plate assembly with an outer diameter of 20mm, the diameter of the over-molding holes is 1.5mm, and the area of one over-molding hole is 1.77mm²The area of the middle pole plate body is 143mm². If the middle pole plate body is provided with 2 plastic-passing holes, the plastic-passing holes account for 2.46 percent of the area of the middle pole plate. For another example, for a middle pole plate assembly with an outer diameter of 24mm, the diameter of the over-molding hole is 2mm, and the area of one over-molding hole is 3.14mm²The area of the middle pole plate body is 231mm². If the middle pole plate body is provided with 2 plastic-passing holes, the plastic-passing holes occupy 2.7% of the area of the middle pole plate. For another example, for a plate with an outer diameter of 35mm, the diameter of the over-molding hole is 4mm, and the area of one over-molding hole is 12.56mm²The area of the middle pole plate body is 566mm². If 2 plastic-coated holes are arranged on the middle pole plate body, the plastic-coated holes occupy 4.4% of the area of the middle pole plate.

Fig. 12A illustrates a top view of a skeletal assembly 200a, fig. 12B illustrates a perspective view of the skeletal assembly 200a, and fig. 12C illustrates a cross-sectional view of the skeletal assembly 200a illustrating the ejector 258a, 258B provided on the skeletal assembly 200a, wherein an ejector rod 380 is also engaged to the skeletal assembly 200a of fig. 12C. After the injection molding of the skeleton assembly is completed, the ejector rod 380 abuts against the skeleton assembly at the

ejector portions

258a and 258b of the skeleton assembly, and ejects the skeleton assembly from the mold, so as to realize the demolding of the skeleton assembly 200 a.

In the bobbin assembly 200a, in order to solve the problem of the bobbin deformation of the bobbin assembly during the demolding process after the injection molding, an improved ejector is provided. As shown, the frame assembly 200a includes a middle pole plate assembly and upper and

lower frame portions

250 and 260. The upper wall 252 of the upper skeleton portion 250 is provided with three lifters 258a and two lifters 258 b. Three lifters 258a are provided near the inner periphery of the backbone assembly 200a around the rotor cavity. In one or more embodiments according to the present invention, the lifters 258a are disposed such that their projection is between the inner circles of the claws and the outer circles of the

sidewalls

256, 266 of the upper and

lower skeleton portions

250, 260, i.e., the lifters 258a are between the inner circles of the claws of the upper and lower middle plates and the outer circle of the sidewall of the first skeleton portion in the radial direction. Two knock portions 258b are provided on the upper wall 252 of the upper skeleton portion 250, near the terminal block 270. The configuration of the ejection part is beneficial to the stable demoulding of the whole framework assembly.

As shown in fig. 12B and 12C, the ejector 258a according to one or more embodiments of the present invention further includes an ejector reinforcement 258a-1 extending in the axial direction from the ejector 258a between the upper wall 252 of the upper skeleton portion 250 and the lower wall 264 of the lower skeleton portion 260. In some embodiments according to the present invention, the topping reinforcing portion 258a-1 is integrally injection-molded with the upper skeleton portion 250 and the lower skeleton portion 260. In some embodiments according to the utility model, the topping reinforcement 258a-1 is a thickened structure formed on the sidewall 256 and the sidewall 266. In some embodiments, the topping reinforcement 258a-1 includes a topping reinforced outer portion formed on a radially outer side of the sidewall 256 and the sidewall 266 and a topping reinforced inner portion formed on a radially inner side of the sidewall 256 and the sidewall 266. In some embodiments, the cross-section of both the topping reinforced outer portion and the topping reinforced inner portion is a portion of a circle. Although not shown in the drawings, the bobbin assembly 200a also includes a lifter reinforcement portion extending in the axial direction from the lifter portion 258 b.

By means of the ejector 258a and the ejector 258b, the skeleton assembly 200a of the present invention can be smoothly demolded using ejector pins, preventing the possible deformation problem of the skeleton assembly during the demolding process.

Fig. 12A-12C illustrate specific locations and numbers of lifters, however the utility model is not so limited. In other embodiments according to the utility model, carcass assembly 200a may include any suitable number of lifters 258a and/or any suitable number of lifters 258 b. In other embodiments according to the present invention, skeletal assembly 200a includes only topper portion 258a and does not include topper portion 258 b. In other embodiments according to the present invention, the lifters 258a are equally spaced along the inner periphery of the skeletal assembly 200 a. In other embodiments according to the utility model, each topping has a diameter of about 1.2 mm.

In some embodiments according to the utility model, the ejector 258a of the skeletal assembly 200a is disposed at a circumferential location that is free of mold locating features (including radial, axial, and circumferential abutment contours). For example, in some embodiments according to the utility model, only some of the poles of the middle pole plate assembly are provided with radial, axial and/or axial abutments, for example on poles that are spaced apart. At this time, the ejector 258a may be provided at a circumferential position of the pole piece where the abutment portion is not provided. Such setting makes liftout portion 258a stagger with the mould location structure in the circumferencial direction, avoids or minimizing the interact between liftout operation and the mould location structure, has guaranteed product quality.

In the embodiment shown in the drawings, the topping reinforcement portion 258a-1 extends from the upper wall 252 of the upper skeleton portion 250 to the lower wall 264 of the lower skeleton portion 260, however, the present invention is not limited thereto. In an alternative embodiment according to the present invention, the ejector reinforcement 258a-1 may extend from the ejector reinforcement 258a by an axial length less than a distance between the upper wall 252 of the upper skeleton portion 250 and the lower wall 264 of the lower skeleton portion 260.

Because the wall thickness of the upper skeleton part and the lower skeleton part of the skeleton assembly is thin, the lower wall of the lower skeleton part of the skeleton assembly can be pressed and deformed during the batch circulation after the injection molding is finished, and the like. The deformed framework assembly can cause the conditions of enameled wire breakage, wire hanging, high full rate and overall deformation of the coil assembly during automatic winding, and the final deformed coil assembly arranged in the motor can cause overall noise and poor performance.

In order to increase the compressive strength of the skeletal assembly, the skeletal assembly of the present invention may be provided with reinforcing ribs. Fig. 13A illustrates a perspective view of a bobbin assembly 200B, fig. 13B illustrates a cross-sectional view of the bobbin assembly 200B, and fig. 13C illustrates a cross-sectional view of a claw-pole machine 100B, according to some embodiments of the present invention, the claw-pole machine 100B including the bobbin assembly 200B mounted therein.

As shown, a stiffener 268 is provided on the lower wall 264 of the lower frame portion 260 of the frame assembly 200b to enhance the strength of the frame assembly. The rib 268 is an annular rib 268 extending downwardly from the lower wall 264 of the lower skeletal portion 260. The rib 268 is concentric with the lower skeletal portion 260 of the skeletal assembly and the outer circumference of the rib 268 is flush with the outer circumference of the lower wall 264 of the lower skeletal portion 260, i.e. the outer diameter of the rib 268 is the same as the outer diameter of the lower wall 264 of the lower skeletal portion 260.

As shown in fig. 13B, the lower skeleton portion has a wall thickness of w1, the ribs 268 have a width of w2, and the ribs have a thickness of D1. In one or more embodiments according to the present invention, w 1-w 2-D1. In some embodiments, the thickness of the ribs is 0.3-0.7 mm. In an alternative embodiment the cross-section of the ribs may be a portion of a circle, for example a semi-circle.

The reinforcing rib has the following technical advantages:

1. the performance of the finished product is as follows: the reinforcing ribs are additionally arranged on the outer surface of the lower wall of the lower framework to improve the compressive strength of the framework assembly, and the situations of wire breakage, wire hanging and high full rate when the framework assembly is wound are avoided. The problem of poor winding caused by deformation of the framework component is solved, and therefore poor performance of the whole machine is avoided.

2. The processing technology comprises the following steps: the material injection hole of the framework component is arranged on the lower wall plane of the lower framework part, and the reinforcing ribs on the lower wall of the lower framework part can accelerate the circulation of injection molding materials during injection molding.

3. Assembling: as shown in fig. 13C, the ribs 268 (specifically, the rib thickness D1) may be sized such that the ribs 268 may compensate for assembly dimensional errors when the coil assembly 200b is installed in the housing assembly 110. Therefore, the cover plate assembly 160 can effectively compress the frame assembly 200b and the upper electrode plate assembly, and the situation that the frame assembly and the upper electrode plate assembly shake due to the existence of a gap in the housing assembly 110 is avoided.

Fig. 14 illustrates an injection molding method for a bobbin assembly of a pole claw motor according to some embodiments of the present invention, the injection molding method including steps S01-S04. Step S01 includes: an injection molding mold is provided, the mold having a radial abutment profile. Step S02 includes: a middle pole plate assembly is provided and includes an upper middle pole plate and a lower middle pole plate which are stacked together. The upper center pole plate has an upper center pole plate body and a plurality of pole fingers extending axially from the upper center pole plate in a direction away from the lower center pole plate. The lower center pole plate has a lower center pole plate body and a plurality of pole fingers extending axially from the lower center pole plate in a direction away from the upper center pole plate. Radial abutments are provided on the radial outer side of at least some of the claws of the upper and/or lower middle pole plate. Step S03 includes: and placing the middle polar plate assembly in a cavity of an injection molding mold and closing the mold, so that the radial abutting profiling part of the mold abuts against the radial abutting part of the upper middle polar plate and/or the lower middle polar plate. Step S04 includes: and injecting the injection molding material into a cavity of the mold, and solidifying the injection molding material on the middle pole plate component to form the framework component.

In some alternative embodiments according to the present invention, the injection mold provided in step S01 includes an upper contoured shape-imparting core and a lower contoured shape-imparting core. The lower profiled locating core comprises a plurality of teeth forming a shape generally complementary to the plurality of prongs of the upper central pole plate, the upper profiled locating core comprises a plurality of teeth forming a shape generally complementary to the plurality of prongs of the lower central pole plate, the upper profiled locating core and/or the lower profiled locating core comprises the radial abutment profile.

In some alternative embodiments according to the present invention, at least some of the claws of the upper and lower middle pole plates are further provided with axial abutment contoured portions thereon, and the upper and/or lower contoured shape positioning cores are provided with axial abutment contoured portions, wherein step S03 further comprises causing the axial abutment contoured portions of the upper and/or lower contoured shape positioning cores to abut the axial abutment portions of the upper and/or lower middle pole plates.

In some alternative embodiments according to the present invention, at least some of the claws of the upper and lower middle pole plates are provided with circumferential abutment contoured portions thereon, and the upper and/or lower contoured shape cores are provided with circumferential abutment contoured portions, wherein step S03 further comprises causing the circumferential abutment contoured portions of the upper and/or lower contoured shape cores to abut the circumferential abutment portions of the upper and/or lower middle pole plates.

In some alternative embodiments according to the utility model, the injection molding method further comprises one or more of the following steps:

A. overlapping the upper middle pole plate and the lower middle pole plate to form a middle pole plate assembly;

B. drying the injection molding material, wherein the step A can be carried out simultaneously;

C. automatically or manually placing the middle pole plate assembly into a mold, and closing the mold;

D. adjusting injection molding pressure;

E. adjusting the mold closing pressure of the half mold;

F. injecting the injection molding material into a half mold;

G. maintaining the pressure of the mold;

H. and opening the mold, and ejecting the framework component by the ejector rod.

In some embodiments according to the utility model, the claw-pole motor is a claw-pole stepper motor. In further embodiments according to the utility model, the claw-pole machine is a claw-pole synchronous machine.

In the embodiment shown in the figures, the radial abutment is in the form of a bevel connected to the end face of the free end of the pole piece, on the side facing away from the rotor cavity, and the radial abutment profile is in the form of a bevel formed on the bottom of the slot between adjacent teeth of the shaped core profile, although the utility model is not limited thereto. In other embodiments of the utility model, the radial abutment and radial abutment profile may take any suitable form, provided that the radial abutment on the pole piece can abut the radial abutment profile on the core forming portion to limit radially outward movement of the pole piece.

In the embodiment shown in the figures, the axial abutment is in the form of an end face of the free end of the pole piece and the axial abutment profile is in the form of a flat surface formed on the bottom of the slot between adjacent teeth of the core profile, although the utility model is not limited thereto. In other embodiments of the utility model, the axial abutment and the axial abutment profile can take any suitable form, provided that the axial abutment on the pole piece can abut against the axial abutment profile on the core forming portion to limit axial movement of the middle pole plate assembly.

In the embodiment shown in the figures, the circumferential abutment is in the form of two circumferential sides of the free end of the pole finger and the circumferential abutment profile is in the form of a circumferential side of an adjacent tooth formed in the core forming portion in the vicinity of the tooth root, although the utility model is not limited thereto. In other embodiments of the utility model, the circumferential abutment and the circumferential abutment profile can take any suitable form, provided that the circumferential abutment on the pole claw can abut the circumferential abutment profile on the core forming portion to limit the circumferential movement of the middle pole plate assembly.

In the embodiment shown in the drawings, the connection between the upper middle pole plate and the lower middle pole plate is realized by clamping the superposed positioning columns on the upper middle pole plate and the lower middle pole plate with the superposed positioning holes, but the utility model is not limited thereto. In other embodiments of the present invention, the upper and lower middle pole plates may be connected together by any suitable means.

The above description is only exemplary embodiments adopted for illustrating the principle of the present invention, and is not intended to limit the scope of the present invention. It will be apparent to those skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope of the utility model, and these changes and modifications are also within the scope of the utility model.

Claims

1. A bobbin assembly for a pole claw machine, the bobbin assembly having an axis and an inner circumference surrounding the axis and defining a rotor cavity, the bobbin assembly comprising:

2. The bobbin assembly for a pole claw motor of claim 1, further comprising one or more second trims disposed on an upper wall of the first bobbin portion, the bobbin assembly further comprising a terminal block disposed at one side of the bobbin assembly, the second trims being disposed adjacent to the terminal block.

3. The bobbin assembly for a pole claw motor according to claim 1, wherein the first ejector is between an inner circle of the pole claws of the upper and lower middle pole plates and an outer circle of the side wall of the first bobbin section in a radial direction.

4. The bobbin assembly for a pole claw motor according to claim 1, wherein the second bobbin portion includes an upper wall, a lower wall, and a side wall extending between the upper wall and the lower wall, and each of the first ejector portions further includes an ejector reinforcement portion axially extending from the first ejector portion between the upper wall of the first bobbin portion and the lower wall of the second bobbin portion.

5. The bobbin assembly for a pole claw machine according to claim 1, wherein the plurality of first lifters are three first lifters evenly spaced in a circumferential direction.

6. The frame work assembly for a pole claw machine according to any one of claims 1 to 5, characterized in that at least some of the claws of the upper and lower middle pole plates are provided with axial abutment portions adapted to abut against axial abutment profiled portions of an injection mold.

7. The bobbin assembly for a pole claw machine according to claim 6, wherein the axial abutment is provided on a portion of the pole claws of the upper and/or lower middle pole plates that are evenly spaced apart, and the plurality of first lifters are provided so as to be circumferentially spaced apart from the axial abutment.

8. The bobbin assembly for a pole claw machine according to claim 6, wherein the axial abutment is an end face of a free end of the pole claw.

9. The bobbin assembly of any one of claims 1 to 5, wherein the upper and lower middle pole plates are each provided with one or more over-molding holes, and the over-molding holes of the upper middle pole plate are aligned with the over-molding holes of the lower middle pole plate to form one or more over-molding holes penetrating through the middle pole plate assembly.

10. The bobbin assembly for a pole claw motor according to any one of claims 1 to 5, wherein the second bobbin portion includes an upper wall, a lower wall, and a side wall extending between the upper wall and the lower wall, the bobbin assembly including an annular bead extending in an axially downward direction from an outer periphery of the lower wall of the second bobbin portion.

11. A claw pole machine, comprising:

a housing assembly;

the bobbin assembly for a pole claw machine of any of claims 1-10, the bobbin assembly mounted within the housing assembly, the bobbin assembly wound with a coil;

12. A claw machine according to claim 11, characterized in that the claw machine is a claw stepper machine or a claw synchronous machine.