CN201207589Y - Motor rotor - Google Patents

Abstract

A motor rotor comprises a hub, a metal ring and a magnet ring. The hub has a ring portion; the metal ring is provided with a combination part, and the metal ring is rolled into a ring shape by a metal sheet to be combined with the inner peripheral surface of the ring part of the wheel hub, a first positioning part and a second positioning part are respectively formed at two ends of the metal sheet, and the first positioning part and the second positioning part are mutually combined to form the combination part; the magnet ring is combined with the inner peripheral surface of the metal ring. Therefore, the metal ring can form a predetermined ring body by using the combining part.

Description

Motor rotor

technical field

The utility model relates to a motor, in particular to a motor rotor which can be combined with a stator to form a motor structure.

Background technique

Referring to FIGS. 1 and 2 , the prior art motor rotor 4 includes a hub 41 , a metal ring 42 and a magnet ring 43 . The central position of the inner side of the hub 41 is to set a rotating shaft 411; the metal ring 42 is combined with the inner peripheral surface of the hub 41, and in order to make the metal ring 42 and the hub 41 more firmly integrated, the metal ring The cross section of 42 is preferably formed into an inverted L shape; in addition, the magnet ring 43 is combined with the inner peripheral surface of the metal ring 42 . Accordingly, the metal ring 42 can be interposed between the hub 41 and the magnet ring 43 to provide a magnetic seal.

However, since the metal ring 42 of the motor rotor 4 in the prior art must be formed by punching multiple times, the section of the metal ring 42 can be formed into an inverted L shape. In addition to the inconvenience, it is also quite easy to generate redundant waste materials, which further leads to an increase in the manufacturing cost of the motor rotor 4 and a waste of redundant material costs.

Please refer to FIG. 3 , which is an invention patent of “motor rotor and its manufacturing method”. This other prior art motor rotor 5 also includes a hub 51 , a metal ring 52 and a magnet ring 53 . Wherein the metal ring 52 is rolled from a strip-shaped metal sheet, and the length of the strip-shaped metal sheet is equal to or slightly smaller than the inner circumference of the hub 51, so that the ring-shaped metal ring 52 The inner peripheral surface of the hub 51 is inserted, and the metal ring 52 can elastically support the inner peripheral surface of the hub 51 radially, and the two ends of the metal ring 52 can be in contact or have a slight distance. Finally, the magnet ring 53 can also be forced into the inner peripheral surface of the metal ring 52 .

The metal ring 52 of the motor rotor 5 of the prior art is directly rolled from a strip-shaped metal plate, so it has many advantages such as convenient manufacture and no unnecessary waste, and can effectively improve the above-mentioned original prior art motor rotor. 4. Existing shortcomings. However, as shown in FIG. 4 , since the two ends of the metal plate do not have positioning structures, when the metal ring 52 elastically supports the inner peripheral surface of the hub 51 in the radial direction, the two ends of the metal plate The end is still prone to axial deviation (as shown in Figure 4), which will not only cause difficulty in the subsequent assembly of the magnet ring 53, but also affect the rotational stability of the motor rotor 5, so there is still a need for further improvement.

Utility model content

The main purpose of the present utility model is to provide a motor rotor, which utilizes a metal plate rolled to form a metal ring, and the two ends of the metal plate are respectively formed with a first positioning part and a second positioning part for the The metal ring can form a joint part, so that the utility model has the effects of improving the positioning and joint effect, the convenience of assembly and the quality of the motor rotor.

Another object of the present utility model is to provide a motor rotor, which utilizes the outer peripheral surface of the metal ring to form an engaging portion, so that the metal ring can be tightly combined with the hub, so that the utility model can improve the joint stability effect.

According to the motor rotor of the present invention, it comprises a hub, a metal ring and a magnet ring. The wheel hub has a ring portion; the metal ring has a joint portion, and the metal ring is rolled into a ring shape by a metal plate to be combined with the inner peripheral surface of the ring portion of the wheel hub, the metal plate A first positioning portion and a second positioning portion are respectively formed at both ends of the sheet, and the first positioning portion and the second positioning portion are combined with each other to form the joint portion; the magnet ring is combined with the inner peripheral surface of the metal ring. Thereby, the metal ring can utilize the joint part to form a predetermined ring body.

In addition to improving the convenience of assembly, the utility model can effectively ensure the rotation stability of the motor rotor of the utility model after it is combined with a stator to form a motor structure. Furthermore, when an engaging portion is formed on the outer peripheral surface of the metal ring, the joint stability between the hub and the metal ring can be relatively improved to ensure the quality of the motor rotor.

Description of drawings

Figure 1: An exploded perspective view of a prior art motor rotor.

Figure 2: Schematic diagram of the assembly of a prior art motor rotor.

Figure 3: An exploded perspective view of another prior art motor rotor.

FIG. 4 : An assembly diagram of a hub and a metal ring of another motor rotor in the prior art.

Fig. 5: A three-dimensional exploded view of the rotor of the motor of the present invention.

Figure 6: A schematic diagram of the assembly of the rotor hub and the metal ring of the motor of the present invention.

Fig. 7: The expanded plan view of the metal ring of the motor rotor of the utility model.

Figure 8: A three-dimensional appearance view of the metal ring of the motor rotor of the present invention.

Fig. 9: An expanded plan view of another embodiment of the metal ring of the motor rotor of the present invention.

Fig. 10: A three-dimensional appearance view of another embodiment of the metal ring of the motor rotor of the present invention.

Fig. 11: A combined sectional view of the rotor of the motor of the present invention.

Fig. 12: A combined cross-sectional view of another embodiment of the motor rotor of the present invention.

[Description of main component symbols]

1 hub 11 ring part 12 closed part

121 Central shaft 13 Blade 14 Ring flange

15 ring groove 2 metal ring 21 junction

22 First positioning part 23 Second positioning part 24 Snapping part

241 groove 242 convex line 243 rough surface

3 magnet ring

〔current technology〕

4 Motor rotor 41 Wheel hub 411 Rotation shaft

42 Metal Ring 43 Magnet Ring 5 Motor Rotor

51 hub 52 metal ring 53 magnet ring

Detailed ways

In order to make the above and other purposes, features and advantages of the present utility model more obvious and understandable, the preferred embodiments of the present utility model are specifically cited below, together with the accompanying drawings, for detailed description as follows:

Please refer to FIGS. 5 and 6 , the motor rotor of the present invention mainly includes a hub 1 , a metal ring 2 and a magnet ring 3 . The metal ring 2 and the magnet ring 3 are combined inside the hub 1, and the metal ring 2 is interposed between the hub 1 and the magnet ring 3 to provide a magnetic seal. Thereby, the motor rotor of the present invention can be combined with a stator to form a motor structure.

The hub 1 has a ring portion 11 and a closed portion 12, the closed portion 12 is formed on one side of the ring portion 11, so that one side of the ring portion 11 forms a closed shape, and the other side is relatively formed. Open state. Moreover, a central axis 121 is disposed at the center of the sealing portion 12 , and the central axis 121 is located inside the ring portion 11 . In addition, several blades 13 can also be formed on the outer peripheral surface of the hub 1, so that the hub 1 can be used as a fan wheel of a general fan.

The metal ring 2 has a joint portion 21, and the metal ring 2 is rolled to form a ring shape by using a metal sheet 2', and a first positioning portion 22 and a first positioning portion 22 are respectively formed at the two ends of the metal sheet 2'. A second positioning part 23, the first positioning part 22 and the second positioning part 23 can be combined with each other in various ways such as clamping, buckling, riveting or welding, so that the first positioning part 22 and the second positioning part can be used The joint portion 23 forms the joint portion 21, thereby ensuring that the metal ring 2 can form a predetermined ring body. In addition, the outer peripheral surface of the metal ring 2 can preferably form an engaging portion 24, the engaging portion 24 can increase the joint area between the hub 1 and the metal ring 2, thereby providing the hub 1 and the metal Better fixing effect between ring 2.

The magnet ring 3 is made into a ring shape by using strip-shaped plastic magnets, rubber magnets or magnets of other suitable materials. Two ends of the magnet ring 3 are engaged with each other, so that the ring-shaped magnet ring 3 is combined with the inner peripheral surface of the metal ring 2 .

Utilizing the design concept that the two ends of the metal sheet can be combined with each other, the first positioning part 22 and the second positioning part 23 of the metal sheet 2' can be roughly divided into the following several different implementation modes (to disclose several preferred Embodiment, other structural designs that can achieve the same binding effect should still be covered by the scope of implementation of the present utility model), wherein:

7 and 8, the first positioning portion 22 of the metal plate 2' forms a protrusion, and the second positioning portion 23 of the metal plate 2' forms a recess corresponding to the protrusion. In this way, when the metal sheet 2' is rolled into a ring shape, the convex part can be relatively snapped into the concave part to form the joint part 21, and preferably can be fixed to the joint part 21 by riveting, In order to ensure that the metal ring 2 can utilize the joint portion 21 to form a predetermined ring body.

Please refer to Figures 9 and 10, the first positioning portion 22 of the metal sheet 2' is formed with several serrated protrusions, and the second positioning portion 23 of the metal sheet 2' is formed corresponding to the serrated protrusions. Several jagged recesses. Thereby, when the metal plate 2' is rolled into a ring shape, each of the saw-toothed protrusions can be relatively snapped into each of the saw-toothed recesses, so as to further enhance the first positioning portion 22 and the second positioning portion 23, thereby ensuring that the metal ring 2 can utilize the joint portion 21 to form a predetermined ring body.

Moreover, the rotor of the motor of the present invention can also be designed by using the engaging portion 24 of the metal ring 2 to effectively increase the bonding area between the hub 1 and the metal ring 2, so that the gap between the hub 1 and the metal ring 2 can be increased. It has better fixing effect. In this embodiment, the engaging portion 24 can be further divided into the following several different implementation modes (to disclose several preferred embodiments, other structural designs that can achieve the same combination should still be included in the scope of the present utility model scope of implementation), where:

7 and 8, the engaging portion 24 of the metal ring 2 is a plurality of grooves 241, and each of the grooves 241 extends from the first positioning portion 22 of the metal plate 2' to the second positioning portion. Section 23. As shown in Figure 11, the inner peripheral surface of the ring portion 11 of the hub 1 can be formed with several ring flanges 14 correspondingly, and each of the ring flanges 14 is combined in each groove 241 of the metal ring 2 to effectively increase the The bonding area between the hub 1 and the metal ring 2 enables a tighter fixing effect between the hub 1 and the metal ring 2 .

Please refer to FIG. 12 , the engaging portion 24 of the metal ring 2 can also be designed as a plurality of protruding lines 242 . Several annular grooves 15 can be formed on the inner peripheral surface of the ring portion 11 of the hub 1, so that each convex line 242 of the metal ring 2 can be combined with each annular groove 15 formed on the inner peripheral wall of the hub 1. The bonding area between the hub 1 and the metal ring 2 is effectively increased, so that a tighter fixing effect is formed between the hub 1 and the metal ring 2 .

Referring to FIGS. 9 and 10 again, the engaging portion 24 of the metal ring 2 is a rough surface 243 formed on the outer peripheral surface of the metal ring 2 . Thereby, after the hub 1 and the metal ring 2 are combined with each other, the rough surface 243 can also be used to relatively increase the joint area between the hub 1 and the metal ring 2, so that the hub 1 and the metal ring 2 A tighter fixation effect is formed between them.

On the whole, the metal ring 2 of the motor rotor of the present invention can be designed with the engagement portion 24 of the various embodiments shown above, and further select the first positioning portion 22 and the second positioning portion of the various embodiments disclosed above. 23 are combined with each other so as to form a motor rotor with more complete functions. For example: metal ring 2 with convex and concave design can choose to combine the design of one of the groove 241, convex line 242 or rough surface 243; metal ring 2 with serrated convex and concave design can also be A combination of one of the grooves 241 , ridges 242 or rough surfaces 243 is selected.

As mentioned above, the metal plate 2' of the motor rotor of the present invention is rolled into a ring shape, so it can retain its manufacturing convenience and many advantages such as unnecessary waste materials will not be generated. More importantly, both ends of the metal sheet form a first positioning portion 22 and a second positioning portion 23 that can be combined with each other, so when the metal sheet 2' is wound into a ring shape to form the metal ring 2 Afterwards, the first positioning part 22 and the second positioning part 23 can be used to form the joint part 21, so as to ensure that the metal ring 2 forms a predetermined ring body by using the joint part 21. In addition to improving its assembly convenience, it can also Effectively ensure the rotation stability of the motor rotor of the utility model after it is combined with a stator to form a motor structure. Furthermore, when the engaging portion 24 is further formed on the outer peripheral surface of the metal ring 2 , the joint stability between the hub 1 and the metal ring 2 can be relatively improved to ensure the quality of the motor rotor.

Claims (14)

1. A motor rotor, characterized by comprising: a hub having a collar portion; A metal ring has a joint part, and the metal ring is rolled into a ring shape by a metal plate to be combined with the inner peripheral surface of the ring part of the hub, and a first positioning part is formed at both ends of the metal plate and a second positioning part, the first positioning part and the second positioning part are combined with each other to form the joint part; and A magnet ring is combined with the inner peripheral surface of the metal ring. 2. The motor rotor according to claim 1, wherein an engaging portion is formed on the outer peripheral surface of the metal ring, and the engaging portion is combined with the inner peripheral surface of the ring portion of the hub. 3. The motor rotor as claimed in claim 2, characterized in that: the engaging portion of the metal ring is a plurality of grooves, and a plurality of ring flanges are formed on the inner peripheral surface of the ring portion of the hub to be combined with each of the grooves Inside. 4. The motor rotor according to claim 2, characterized in that: the engaging part of the metal ring is a plurality of convex lines, and the inner peripheral surface of the ring part of the hub forms several ring grooves, and each of the convex lines is combined with each inside the ring groove. 5. The motor rotor as claimed in claim 2, wherein the engaging portion of the metal ring is a rough surface, and the rough surface is combined with the inner peripheral surface of the ring portion of the hub. 6. The motor rotor according to claim 1, 2, 3, 4 or 5, wherein the first positioning portion forms a convex portion, and the second positioning portion of the metal ring forms a concave portion corresponding to the convex portion. 7. The motor rotor according to claim 1, 2, 3, 4 or 5, characterized in that: the first positioning portion forms several serrated protrusions, and the second positioning portion of the metal ring corresponds to the serrated protrusions. The portion forms several jagged recesses. 8. The motor rotor according to claim 1, 2, 3, 4 or 5, characterized in that: a closed portion is formed on one side of the ring portion of the hub, and a central shaft is arranged at the center of the closed portion, the The central axis is located inside the ring portion. 9. The motor rotor as claimed in claim 1, 2, 3, 4 or 5, characterized in that several blades are formed on the outer peripheral surface of the hub. 10. A metal ring for a motor rotor, which is characterized in that it has a joint part, and the metal ring is rolled into a ring shape with a metal plate, and a first positioning part and a second positioning part are formed at both ends of the metal plate. Two positioning parts, the first positioning part and the second positioning part combine with each other to form the combining part. 11. The metal ring of a motor rotor according to claim 10, wherein an engaging portion is formed on the outer peripheral surface of the metal ring. 12. The metal ring of a motor rotor as claimed in claim 11, wherein the engaging portion of the metal ring is selected from one of several grooves, several raised lines or a rough surface. 13. The metal ring of a motor rotor according to claim 10, 11 or 12, wherein the first positioning portion forms a convex portion, and the second positioning portion of the metal ring forms a concave portion corresponding to the convex portion. 14. The metal ring of motor rotor according to claim 10, 11 or 12, characterized in that: the first positioning portion forms several serrated protrusions, and the second positioning portion of the metal ring corresponds to the serrated protrusions Several jagged recesses are formed.

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