TWM509114U - Rotor and its mould - Google Patents

Description

Rotor and its mould

The present invention relates to a rotor and a mold thereof, and more particularly to a rotor and a mold thereof for setting a permanent magnet in a groove through an injection molding method, so that there is no gap between the permanent magnet and the cavity, thereby improving the performance of the motor.

According to the compressor having a casing inner diameter of less than 56 mm and a cooling capacity of less than 500 W, it is generally referred to as a micro compressor 100. As shown in Fig. 1, the internal structure includes a rotor 1 and a stator 2.

The rotor of the existing micro-compressor is manufactured by adopting a ring-shaped bonding method to place a neodymium-iron-boron permanent magnet on the surface of the rotor core. However, this arrangement is low in magnetic performance, and the motor has a salient ratio = 1, can not produce reluctance torque, there is a need for improvement.

In view of the problems caused by the above process, there is a conventional rotor 1 which, as shown in Fig. 2, is provided with a permanent magnet 12 (sintered neodymium iron boron) in the mounting groove 11 by means of insertion, however, due to the permanent magnet The insertion and installation of 12 is done manually. When the size of the motor is small and the number is large, the installation is time-consuming and labor-intensive, and the permanent magnet 12 is first manufactured and then inserted into the mounting groove 11, which often produces a small size. The problem of the deviation causes the permanent magnet 12 to be in close contact with the mounting groove 11 to form a gap, which will affect the performance of the motor.

In view of the above-mentioned problems of the prior art, the purpose of the present invention is to provide a rotor and a mold thereof to solve the conventional technique of inserting a permanent magnet in an inserting manner. When the rotor is formed in the mounting groove, problems such as difficulty in installation, difficulty in man-made processing, and excessive gap between the core and the mounting groove are caused.

According to the purpose of the present invention, a rotor is proposed, which is suitable for a micro compressor. The rotor comprises: a base comprising a plurality of mounting slots, wherein the slots of each mounting slot are exposed on one surface of the base, and each mounting The groove bottom of the groove is adjacent to the other surface of the base; and a permanent magnet is formed by injection molding into each of the mounting grooves via an injection device.

Preferably, the plurality of mounting slots are co-formed to form a polygon.

Preferably, the base further comprises a shaft hole disposed at a center of a region formed by the plurality of mounting grooves.

Preferably, the material of the permanent magnet is composed of magnet powder and plastic material.

Preferably, the notches of each mounting groove are laterally offset from the bottom of the groove to form a groove having a slope.

Preferably, each of the mounting grooves has a shape corresponding to a peripheral surface of the base.

According to the purpose of the present invention, a mold for assisting the permanent magnet injection molding operation of the rotor is provided, which comprises: a first module and a second module, wherein the first module and the second module are movably combined Covering the base of the fixed rotor, and the first module comprises a plurality of injection holes corresponding to the slots of the mounting slots, and the injection device is inserted into each injection hole to inject the slurry of the magnet powder and the plastic material, thereby forming a permanent magnet Each mounting slot.

As described above, the rotor and the mold of the present invention directly inject the slurry into the magnet mounting groove by injection molding to form a permanent magnet, so that the motor can generate a magnetic resistance with a salient pole ratio greater than 1, and It can effectively improve the difficulty and inconvenience of installation, thus shortening the production time. And the permanent magnet produced by injection molding will be able to be tightly fitted with the mounting groove without gap formation, which can improve the performance of the motor. In addition, the rotor made in this way can make the mounting groove form a chute or have a curvature. The injected permanent magnets can be shaped into various shapes, thereby improving compressor vibration noise and even enhancing magnetic force to improve performance.

100‧‧‧Micro compressor

1, 10‧‧‧ rotor

11, 1011‧‧‧ installation slot

12, 102‧‧‧ permanent magnets

2‧‧‧stator

101‧‧‧Base

1012‧‧‧Axis hole

20‧‧‧Mold

201‧‧‧ first module

2011‧‧‧Injection hole

202‧‧‧ second module

30‧‧‧Injection device

Figure 1 is a schematic diagram of a micro compressor.

Figure 2 is a schematic view of a rotor of the prior art.

Figure 3 is a first schematic view of the rotor of the first embodiment of the present invention.

Fig. 4 is a schematic view showing the rotor and its mold of the first embodiment of the present invention.

Figure 5 is a second schematic view of the rotor of the first embodiment of the present invention.

Figure 6 is a first schematic view of the rotor of the second embodiment of the present invention.

Figure 7 is a second schematic view of the rotor of the second embodiment of the present invention.

Figure 8 is a schematic view of a rotor of a third embodiment of the present invention.

In order to understand the technical characteristics, content and advantages of the creation and the effects that can be achieved by the examiner, the author will use the drawings in detail and explain the following in the form of the examples, and the drawings used therein The subject matter is only for the purpose of illustration and supplementary instructions. It is not necessarily the true proportion and precise configuration after the implementation of the original creation. Therefore, the proportions and configuration relationships of the attached drawings should not be interpreted or limited in the actual implementation scope. First described.

Please refer to FIG. 3, FIG. 4 and FIG. 5, which are respectively a first schematic view of the rotor, a schematic view of the rotor and its mold, and a second schematic view of the rotor of the first embodiment of the present invention. The rotor 10 of the present invention is suitable for use in a micro compressor, and includes a base 101. The base 101 includes a plurality of mounting slots 1011 and a shaft hole 1012. The slots of each mounting slot 1011 are exposed on the base 101. One of the surfaces, the bottom of each of the mounting slots 1011 is adjacent to the other surface of the base 101. Further, the plurality of mounting grooves 1011 are co-constructed to form a polygonal region, and the shaft hole 1012 is located at a central position of a region formed by the plurality of mounting grooves 1011.

The rotor 10 further includes a permanent magnet 102 disposed in each of the mounting slots 1011. The permanent magnet 102 is formed as shown in FIG. 4, and the base 101 of the rotor 10 is assisted by a mold 20, and a The injection device 30 injects and molds the permanent magnets 102 into the respective mounting grooves 1011. The mold 20 includes a first module 201 and a second module 202. The first module 201 and the second module 202 are movably combined to cover the base 101 of the rotor 10. The first module 201 includes a plurality of modules. When the first module 201 is attached to the surface of the pedestal 101, each of the injection holes 2011 may correspond to the notch of each of the mounting grooves 1011. The injection device 30 can be inserted into each injection hole 2011 of the first module 201 to inject a mixture of magnet powder and plastic material into the mounting grooves 1011 of the base 101 to form a permanent magnet 102, as shown in FIG. . The injection molded permanent magnet 102 can be closely adhered to the mounting groove 1011 without gaps, thereby improving the performance of the motor.

In addition, please refer to FIG. 6 and FIG. 7 , which are respectively a first schematic diagram and a second schematic diagram of the rotor of the second embodiment of the present invention, and refer to FIG. 8 , which is the third implementation of the present invention. A schematic diagram of a rotor of an example. Since the present invention uses the injection molding method to form the permanent magnet 102, there is no problem of dimensional deviation from the mounting groove 1011. Therefore, when the rotor 10 is manufactured, each of the mounting grooves 1011 is designed to be variously formed. For example, as shown in FIGS. 6 and 7, each of the mounting grooves 1011 has a shape corresponding to the outer peripheral surface of the base 101, or as shown in FIG. 8, the notches and the bottom of each of the mounting grooves 1011 are laterally displaced, so that the mounting is performed. The groove 1011 forms a groove body having a slope, and the permanent magnet 102 formed by injection molding can assume various shapes corresponding to the mounting groove 1011. Wherein, when the mounting groove 1011 of the rotor 10 is made as in the second embodiment, the magnetic force will be enhanced to improve the performance of the motor; when the mounting groove 1011 of the rotor 10 is made in the third embodiment, It can reduce the lateral force and reduce the vibration noise when the compressor is running.

In summary, the rotor and its mold of the present invention utilize injection molding. The method directly injects the slurry mixed with the magnet powder and the plastic material into the magnet mounting groove to form a permanent magnet, so that the permanent magnet can save manpower in addition to being close to the mounting groove without gaps to improve the performance of the motor. Installation costs, avoiding installation problems, and shortening the labor hours of production.

Looking at the above, it can be seen that under the previous technology, this creation has indeed achieved the desired effect, and it is not easy for people who are familiar with the art to think about it. Moreover, this creation has not been disclosed before the application, and it has Progressive and practical, it has already met the application requirements of the patent, and has filed a patent application according to law. You are requested to approve the application for the creation of this patent to encourage creation.

The embodiments described above are only for explaining the technical idea and characteristics of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement them according to the scope of the patent. That is, the equivalent changes or modifications made by the people in accordance with the spirit revealed by this creation should still be covered by the scope of the patent of this creation.

10‧‧‧Rotor

101‧‧‧Base

1011‧‧‧Installation slot

1012‧‧‧Axis hole

102‧‧‧ permanent magnet

Claims (7)

A rotor suitable for a micro compressor, the rotor comprising: a base comprising a plurality of mounting slots, wherein the slots of each mounting slot are exposed on a surface of the base, and the bottom of each mounting slot Then, it is close to the other surface of the pedestal; and a permanent magnet is formed by injection molding into each of the mounting grooves via an injection device. The rotor of claim 1, wherein the plurality of mounting slots are co-formed to form a polygon. The rotor of claim 2, wherein the base further comprises a shaft hole disposed at a center of a region formed by the plurality of mounting grooves. The rotor of claim 1, wherein the material of the permanent magnet comprises magnet powder and a plastic material. The rotor of claim 1, wherein the notches of each of the mounting slots are laterally offset from the bottom of the groove to form a groove having a slope. The rotor of claim 1, wherein each of the mounting grooves has a shape corresponding to an outer peripheral surface of the base. A mold for assisting the permanent magnet injection molding operation of the rotor according to any one of the items 1 to 6, comprising: a first module and a second module, the first module and the first The two modules are movably combined to cover the base of the rotor, and the first module includes a plurality of injection holes corresponding to the slots of the mounting slots, and the injection device is inserted into each of the injection holes for injection. The slurry of the magnet powder and the plastic material further forms the permanent magnet in each of the mounting grooves.