CN107749679A - A kind of ultra-thin extended type skeleton of hollow-cup motor and its make mould and method - Google Patents

Abstract

The invention discloses an ultra-thin and elongated skeleton of a hollow cup motor: it includes an upper skeleton and a lower skeleton arranged in pairs; The axially extending upper hollow column, the side walls between two adjacent upper hollow columns together form the upper coil frame; the lower frame includes an annular lower end cover, and the upper circumferential array of the annular lower end cover is provided with A number of lower hollow columns extending in the axial direction, and the side walls between two adjacent lower hollow columns together form a lower coil frame; The frame and the lower coil frame together form a coil winding frame. The upper frame and the lower frame of the present invention are made of LCP injection molding, ultra-thin, large area, high resistance, high voltage resistance, suitable for high-power coreless motors; and the mold through engraving and milling can ensure higher precision , so that the appearance of the product has no material shortage, no shrinkage, no deformation, and no burrs.

Description

An ultra-thin and elongated skeleton of a hollow cup motor and its manufacturing mold and method

technical field

The invention relates to the technical field of motors, in particular to an ultra-thin and elongated skeleton of a coreless motor and a manufacturing mold and method thereof.

Background technique

Coreless motors are DC permanent magnet motors. Coreless motor has outstanding energy-saving characteristics, sensitive and convenient control characteristics and stable operation characteristics. As a high-efficiency energy conversion device, it represents the development direction of high-speed motors. The brushless coreless motor breaks through the stator structure of the traditional motor in structure, and adopts an ironless stator. This novel structure completely eliminates the stator core loss and is more suitable for high-frequency motors. In addition, since the stator frame is made of insulating and non-magnetic material, it is equivalent to a structure without cogging. When the rotor rotates at high speed, there will be no teeth. Slot torque and tooth harmonics make the rotor rotate more smoothly.

The stator frame of the brushless hollow cup motor is mostly insulating and non-magnetic material, which is a non-thermal conductive material. Therefore, from the perspective of heat dissipation and light weight, it is necessary to make the stator frame as thin as possible. In addition, making the stator frame longer is also a hollow cup A necessary means for the motor to develop in the direction of high power. However, the extended skeleton of the ultra-broadband will inevitably bring about processing difficulties.

Contents of the invention

For this purpose, the present invention provides an ultra-thin and elongated skeleton of a coreless motor and a manufacturing mold and method thereof.

The technical scheme that the present invention adopts is as follows:

An ultra-thin and elongated skeleton of a hollow cup motor: it includes an upper skeleton and a lower skeleton arranged in pairs; The upper hollow column, and the side walls between two adjacent upper hollow columns together form the upper coil frame; the lower frame includes an annular lower end cover, and the upper circumferential array of the annular lower end cover is provided with a number of coils along the axial direction. The extended lower hollow columns, the side walls between two adjacent lower hollow columns form the lower coil frame together; the upper hollow columns and the lower hollow columns are aligned and assembled opposite to each other, and the upper coil frame and the lower coil frame together to form a coil winding frame.

The sections of the upper hollow column and the lower hollow column are hollow sector rings, and the inner walls of the upper hollow column and the lower hollow column are provided with notches extending in the axial direction.

Both the ends of the upper hollow column and the lower hollow column are provided with chamfers.

The upper frame and the lower frame are formed by injection molding of liquid crystal polymer LCP.

A manufacturing mold for injection molding the above-mentioned ultra-thin and elongated skeleton of the coreless motor, including an upper template and a lower template, and the main template and the lower template are respectively provided with an upper injection station and a lower injection station. The injection molding station and the lower injection molding station are provided with corresponding cores and inserts corresponding to the upper frame or the lower frame.

There are three injection inlets for the upper frame and the lower frame respectively, which are evenly distributed on the ring-shaped upper end cover and the ring-shaped lower end cover.

The forming surfaces on the upper template, the lower template and the core are processed by engraving and milling.

The upper template and the lower template are respectively provided with four upper injection molding stations and lower injection molding stations, of which two upper injection molding stations and lower injection molding stations are used for forming the upper skeleton, and the other two upper injection molding stations and lower injection molding stations The injection molding station is used for lower skeleton molding.

A manufacturing method for processing the above-mentioned ultra-thin and elongated frame of the hollow cup motor, the steps are as follows: use liquid crystal polymer LCP to injection mold the upper frame and the lower frame; assemble the upper frame and the lower frame in pairs, and then place the The thermal conductive resin is potted with the lower hollow column to form a complete coil winding frame.

The beneficial effects of the present invention are: the upper frame and the lower frame of the present invention are made of LCP injection molding, which is not only ultra-thin, but also has a large area, and has the characteristics of high resistance and high voltage resistance, and is especially suitable for high-power coreless motors; and through The engraving and milling mold can guarantee high precision, so that the appearance of the product has no material shortage, no shrinkage, no deformation, and no burrs.

Description of drawings

Fig. 1 is a schematic diagram of the assembly of the upper frame and the lower frame in the embodiment of the present invention.

Fig. 2 is an exploded schematic view of the upper frame and the lower frame in the embodiment of the present invention.

Fig. 3 is a top view of the upper frame in the embodiment of the present invention.

Fig. 4 is a schematic diagram of the assembly of the upper formwork and the lower formwork in the embodiment of the present invention.

Fig. 5 is an exploded schematic view of the upper template and the lower template in the embodiment of the present invention.

Fig. 6 is another perspective view of the lower formwork in the embodiment of the present invention.

Upper frame 1, lower frame 2, coil winding frame 3, upper template 4, lower template 5, annular upper end cover 11, upper hollow column 12, annular lower end cover 21, lower hollow column 22, upper injection station 41, lower Injection molding station 51, nozzle material 6.

Detailed ways

The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

In the embodiment, as shown in Fig. 1, Fig. 2 and Fig. 3, an ultra-thin and elongated skeleton of a coreless motor: includes an upper skeleton 1 and a lower skeleton 2 arranged in pairs; the upper skeleton 1 includes a ring-shaped upper end cover 11. The annular upper end cover 11 is provided with a number of upper hollow columns 12 extending in the axial direction in a circumferential array, and the side walls between two adjacent upper hollow columns 12 together form an upper coil frame; the lower The skeleton 2 includes an annular lower end cover 21, and the upper circumferential array of the annular lower end cover 21 is provided with a number of lower hollow columns 22 extending in the axial direction, and the side walls between two adjacent lower hollow columns 22 are formed together. The lower coil frame; the upper hollow column 12 and the lower hollow column 22 are aligned one by one and assembled opposite to each other, and the upper coil frame and the lower coil frame together form a coil winding frame 3 . The upper frame 1 and the lower frame 2 of this embodiment are formed by injection molding, not only are ultra-thin, but also have a large area, and have the characteristics of high resistance and high voltage resistance, and are especially suitable for high-power coreless motors.

In the embodiment, as shown in Fig. 1 and Fig. 2, the sections of the upper hollow column 12 and the lower hollow column 22 are hollow fan-shaped rings, and the inner walls of the upper hollow column 12 and the lower hollow column 22 are provided with axially extending notch. The slots in this embodiment are convenient for potting with thermally conductive resin, so as to improve the heat dissipation performance of the upper frame 1 and the lower frame 2 .

In the embodiment, as shown in FIG. 1 and FIG. 2 , the ends of the upper hollow column 12 and the lower hollow column 22 are provided with chamfers. The chamfering in this embodiment facilitates the ejection of the upper frame 1 and the lower frame 2 .

In an embodiment, the upper frame 1 and the lower frame 2 are formed by injection molding of liquid crystal polymer LCP. Thermotropic LCP has a fully aromatic polyester and copolyester structure, and the formed product has good unidirectional mechanical properties, good high temperature performance, good radiation resistance, hydrolysis resistance, weather resistance, and chemical resistance. , Inherent flame retardancy, low smoke generation, high dimensional stability, low moisture absorption, extremely low coefficient of linear expansion, high impact strength and rigidity.

In the embodiment, as shown in Fig. 4, Fig. 5 and Fig. 6, a manufacturing mold for injection molding the above-mentioned hollow cup motor ultra-thin and elongated skeleton: includes an upper template 4 and a lower template 5, and the main template 4 An upper injection molding station 41 and a lower injection molding station 51 are provided corresponding to the lower template 5, and the upper injection molding station 41 and the lower injection molding station 51 are provided with corresponding cores and inserts corresponding to the upper frame 1 or the lower frame 2; The forming surfaces on the upper template 4, the lower template 5 and the core are processed by engraving and milling. In this embodiment, the engraved and milled mold can ensure higher precision, so that the appearance of the product has no material shortage, no shrinkage, no deformation, and no burrs.

In the embodiment, as shown in FIG. 6 , there are three injection inlets for the upper frame 1 and the lower frame 2 , which are evenly distributed on the annular upper end cover 11 and the annular lower end cover 21 . In the embodiment, through the simulation of injection molding and a large number of experiments, the feed inlet designed in this way can ensure good injection molding quality, and its specific position can refer to the position of the nozzle material 6 in Figure 6 .

In the embodiment, as shown in Fig. 4 and Fig. 5, four upper injection molding stations 41 and lower injection molding stations 51 are respectively arranged on the upper template 4 and the lower template 5, wherein two upper injection molding stations 41 and lower injection molding stations The injection molding station 51 is used for molding the upper skeleton 1 , and the other two upper injection molding stations 41 and the lower injection molding station 51 are used for molding the lower skeleton 2 . The structure of this embodiment can simultaneously complete two pairs of upper frame 1 and lower frame 2, which is efficient and reliable in quality.

In this embodiment, a manufacturing method for processing the above-mentioned ultra-thin and elongated frame of the coreless motor, the steps are as follows: use liquid crystal polymer LCP to injection mold the upper frame 1 and the lower frame 2; form the upper frame 1 and the lower frame 2 into After assembling, the upper hollow column 12 and the lower hollow column 22 are filled with thermally conductive resin to form a complete coil winding frame 3 .

Apparently, the above-mentioned embodiments of the present invention are only examples for illustrating the present invention, rather than limiting the implementation of the present invention. For those of ordinary skill in the art, other changes or changes in different forms can be made on the basis of the above description. It is not necessary and impossible to give exhaustive examples for all the implementation manners here. However, the obvious changes or changes derived from the essential spirit of the present invention still belong to the protection scope of the present invention.

Claims (9)

1. A kind of 1. ultra-thin extended type skeleton of hollow-cup motor, it is characterised in that：

   Including the upper skeleton being arranged in pairs（1）With lower skeleton（2）；

   The upper skeleton（1）Including ring-type upper end cover（11）, the ring-type upper end cover（11）Upper Circle-Array is shown provided with some edges Axially extending upper open tubular column（12）, the two neighboring upper open tubular column（12）Between side wall form coil of reaching the standard grade together；

   The lower skeleton（2）Including ring-type bottom end cover（21）, the ring-type bottom end cover（21）Upper Circle-Array is shown provided with some edges Axially extending lower open tubular column（22）, the two neighboring lower open tubular column（22）Between side wall form offline coil together；

   The upper open tubular column（12）With lower open tubular column（22）Alignment, opposite assembled, coil and the offline coil one of reaching the standard grade one by one Play composition coil winding frame（3）.
2. 2. the ultra-thin extended type skeleton of hollow-cup motor according to claim 1, it is characterised in that：The upper open tubular column（12） With lower open tubular column（22）Section be hollow eccentric circular ring, the upper open tubular column（12）With lower open tubular column（22）Inwall is provided with vertically The notch of extension.
3. 3. the ultra-thin extended type skeleton of hollow-cup motor according to claim 1, it is characterised in that：The upper open tubular column（12） With lower open tubular column（22）Termination be equipped with chamfering.
4. 4. the ultra-thin extended type skeleton of hollow-cup motor according to claim 1, it is characterised in that：The upper skeleton（1）With Lower skeleton（2）It is molded by liquid crystal polymer LCP.
5. 5. a kind of manufacture mould of ultra-thin extended type skeleton of hollow-cup motor for described in injection molding claim 1, it is special Sign is：Including cope plate（4）With lower template（5）, the master module（4）With lower template（5）It is correspondingly provided with injection molding station （41）With lower injection molding station（51）, the upper injection molding station（41）With lower injection molding station（51）Corresponding upper skeleton（1）Or lower skeleton （2）It is provided with corresponding fuse and mold insert.
6. 6. manufacture mould according to claim 5, it is characterised in that：The upper skeleton（1）With lower skeleton（2）Injection enter Material mouth respectively has three, is evenly distributed on ring-type upper end cover（11）With ring-type bottom end cover（21）On.
7. 7. manufacture mould according to claim 5, it is characterised in that：The cope plate（4）, lower template（5）And on fuse Forming surface using carving Milling Machining.
8. 8. manufacture mould according to claim 5, it is characterised in that：The cope plate（4）With lower template（5）On be respectively provided with Four upper injection molding stations（41）With lower injection molding station（51）, injection molding station in two of which（41）With lower injection molding station（51）For Upper skeleton（1）Shaping, injection molding station on two other（41）With lower injection molding station（51）For lower skeleton（2）Shaping.
9. 9. a kind of manufacture method for being used to process the ultra-thin extended type skeleton of hollow-cup motor described in claim 1, its feature exist It is as follows in step：Using liquid crystal polymer LCP injection molding upper skeletons（1）With lower skeleton（2）；By upper skeleton（1）With lower skeleton （2）It is assembled in pairs, then in upper open tubular column（12）With lower open tubular column（22）Middle embedding heat-conducting resin is twined with forming complete coil Around frame（3）.