TWM634248U - Thin type motor and stator thereof - Google Patents

Abstract

A thin motor is used to solve the problem that the winding group and the rotor of the conventional thin motor easily interfere with each other. The system includes: a base with a shaft joint; a stator located on the outer periphery of the shaft joint with an iron core and a winding group, the iron core has several poles arranged around a central ring, each of the poles A pole piece is connected to the free end of the pole, each pole has a sunken portion lower than the pole piece, the winding group is wound and combined with the sunken portion of the several poles; and a rotor is rotatably connected to the pole piece Shaft joint.

Description

Thin motor and its stator

The invention relates to a motor and its parts, especially a thin motor and its stator.

By the way, with the demand for thinner and higher performance of electronic products, many thin motors have come out in recent years. However, when the thin motor is developed to a state where the overall thickness does not exceed 10 mm, the winding group on the stator cannot be wound too few turns because of the need to generate enough magnetic effect, so that the winding group cannot be kept with the rotor. If the spacing is not appropriate, the phenomenon that the winding group interferes with the rotor often occurs, causing the rotor to rotate unsmoothly or causing the winding group to wear.

In view of this, there is still a need to improve the known thin motors.

In order to solve the above problems, the purpose of this invention is to provide a thin motor, the stator of which can provide enough winding space, and the winding group can keep a proper distance from the rotor without interference.

The second purpose of this invention is to provide a motor stator, which is suitable for the aforementioned thin motor.

Yet another object of the present invention is to provide a motor stator that is easy to manufacture and assemble.

Directionality mentioned throughout this work or similar terms, such as "front", "back", "left", "right", "upper (top)", "lower (bottom)", "inner", "outer" , "side", etc., are mainly referring to the directions of the attached drawings. Each direction or its approximate terms are only used to assist in explaining and understanding the various embodiments of this creation, not to limit this creation.

The use of the quantifiers "one" or "one" in the elements and components described throughout this creation is only for convenience and to provide the usual meaning of the scope of this creation; it should be interpreted in this creation as including one or at least one, and a single The notion of also includes the plural unless it is obvious that it means otherwise.

Approximate terms such as "combination", "combination" or "assembly" mentioned in the full text of this work mainly include the types that can be separated without destroying the components after connection, or the components can not be separated after connection, etc., which are common knowledge in this field One can be selected according to the material of the components to be connected or assembly requirements.

The motor stator of the present invention includes: an iron core with several poles arranged around a central ring, each pole is connected to a pole piece at its free end, and each pole has a sinking portion lower than the pole piece; and A winding group is wound and combined with the sinking parts of the plurality of poles.

The thin motor of the present invention includes: a base with a shaft joint; a motor stator located on the outer periphery of the shaft joint; and a rotor rotatably connected to the shaft joint.

Accordingly, in the thin motor of this invention, the iron core of the stator has a sunken part lower than the pole shoe for the winding and combining of the winding group, so that the winding space of the winding group is sufficient without reducing the number of winding turns It can also maintain an appropriate distance from the rotor without interfering with it, so as to ensure that the rotor will not rub against the winding group when it rotates, so that the thin motor can perform normally, and the winding group will not suffer from wear and tear. The smooth operation and service life of the thin motor.

Wherein, the iron core can be formed by a single silicon steel sheet. In this way, the iron core can be applied to lighter and thinner thin motors.

Wherein, each of the poles can extend radially outward from the outer edge of the central ring, and each of the poles can have a turning portion, and the turning portion can connect the sinking portion and the pole piece. In this way, each of the poles can be roughly Z-shaped, which not only facilitates forming the sinking portion, but also provides ample space for winding the winding group, which has the effect of improving the convenience of manufacturing and assembling the stator.

Wherein, the iron core can be formed by stacking several silicon steel sheets, the turning portion can be inclined, and the sunken portion does not overlap with the axial projection of the pole piece. In this way, each silicon steel sheet can not only easily form the sinking part and the turning part, but also is not easy to break at the turning part, and the several silicon steel sheets can be easily stacked and assembled, which has the advantages of improving manufacturing convenience and assembly convenience and efficiency.

Wherein, each of the poles can have two turning parts, one turning part can connect the sinking part and the pole shoe, and the other turning part can connect the sinking part and the central ring, and the winding group can be located at the Between the two turning parts. In this way, each of the poles can be roughly U-shaped, which not only facilitates the formation of the sinking portion, but also provides ample space for winding the winding group, which improves the convenience of manufacturing and assembling the stator.

Wherein, the iron core can be formed by stacking several silicon steel sheets, the turning portion can be inclined, and the sunken portion does not overlap with the projection of the pole shoe or the central ring in the axial direction. In this way, each silicon steel sheet can not only easily form the sinking part and the turning part, but also is not easy to break at the turning part, and the several silicon steel sheets can be easily stacked and assembled, which has the advantages of improving manufacturing convenience and assembly convenience and efficiency.

Wherein, an axial distance may be formed between the sunken portion and the pole piece, and the axial distance is preferably less than or equal to 1 mm. In this way, the stator can be applied to thinner motors.

Wherein, the winding group can be wound and combined with the several sinking parts in a radial winding manner. In this way, it has the effect of improving the convenience of assembly.

Wherein, the surface of the iron core may have a vacuum coating insulating layer. In this way, the stator does not need to be provided with a plastic insulating sleeve, which can prevent the short circuit between the winding group and the iron core, and the vacuum coating insulation layer will hardly increase the thickness of the stator, so that the stator can be used in thin motors , and has the effect of improving assembly efficiency and convenience.

Wherein, the rotor may have a magnetic member radially opposite to several pole pieces of the iron core. In this way, it has the effect of improving the convenience of assembly.

Wherein, the shaft connection part may have a shaft tube, and the axial height of the shaft tube is about 2-9 mm. In this way, the stator can be used in thin motors.

Wherein, the shaft connection part may have a shaft tube, the upper surface of the pole post may have a first height from the top surface of the shaft tube, and the lower surface of the pole post may protrude from the bottom edge of the base to the shaft tube. There may be a second height, and the first height is preferably greater than the second height.

Wherein, the shaft connection part may have a shaft tube, and the top end of the winding group preferably does not exceed the top surface of the shaft tube. In this way, the rotor can be prevented from vibrating and rubbing against the stator during operation, which has the effect of improving the smoothness of operation of the thin motor.

Wherein, the top end of the winding group and the top surface of the shaft tube may have an axial distance of 0.1-1 mm. In this way, in a thin motor where the axial height is very small, the distance can effectively improve the interference between the winding group and the rotor without reducing the number of coils, and can improve the operation of the thin motor. smoothness and service life.

In order to make the above and other purposes, features and advantages of this creation more obvious and easy to understand, the preferred embodiments of this creation are specially cited below, and explained in detail with the accompanying drawings; in addition, the same symbols are marked in different drawings are considered the same, and their descriptions will be omitted.

Please refer to Fig. 1, which is the first embodiment of the thin motor of this invention, which includes a base 1, a stator 2 and a rotor 3, the stator 2 is located on the base 1, and the rotor 3 can be subjected to The stator 2 is driven in rotation.

Please refer to FIG. 1 and FIG. 3 , the base 1 has a bottom plate 11 , and a shaft connection portion 12 is connected to the bottom plate 11 and is rotatably connected to the rotor 3 . In this embodiment, the shaft connection part 12 can have a shaft tube 121 and a shaft tube inner assembly 122, the shaft tube 121 can be a metal or plastic tube body formed integrally or detachably combined with the bottom plate 11, the The shaft tube inner assembly 122 is located inside the shaft tube 121 , and the shaft tube inner assembly 122 may include components such as bearings, positioning sleeves, wear-resistant plates or buckling pieces. Wherein, please refer to FIG. 4, the axial height H of the shaft tube 121 can be about 2-9 mm, so as to be suitable for a thin motor; the overall thickness of the thin motor in this embodiment after assembly is preferably not more than 5 mm.

In addition, please refer to FIGS. 1 and 3 , the base 1 also has a circuit board 13 disposed on the outer periphery of the shaft connection portion 12 . In this embodiment, the circuit board 13 can be directly or indirectly fixed to the base plate 11 ; In addition, the circuit board 13 can be a type with bakelite or glass fiber as the substrate, or a flexible printed circuit (Flexible Printed Circuit, FPC), etc., which is not limited in this invention. Wherein, the part of the shaft tube 121 protruding from the base 1 can form a bottom edge 14 on the base 1; in this embodiment, the bottom edge 14 is located on the circuit board 13, but not in this way limit.

Please refer to FIG. 1 and FIG. 2 , the stator 2 is located on the outer periphery of the shaft connection portion 12 of the base 1 for driving the rotor 3 to rotate. The stator 2 has an iron core 21 , and the iron core 21 in this embodiment can be formed by a single silicon steel sheet P, so that the thickness of the entire iron core 21 is relatively thin. Specifically, the iron core 21 has a central ring 21a, and several poles 21b are arranged around the central ring 21a, and each free end of the poles 21b is connected with a pole piece wider than the pole 21b. 21c. In this embodiment, each of the pole pieces 21c only extends on a radial plane and does not have an axially extending structure; in other embodiments, each of the pole pieces 21c can also be inclined outwards, for example but without limitation Extended. During assembly, the iron core 21 can be combined with the shaft connection portion 12 of the base 1 by the central ring 21a, so that the plurality of poles 21b can be arranged annularly on the outer periphery of the shaft connection portion 12, and the plurality of pole shoes 21c Then it can be located at the outermost periphery of the iron core 21 .

Please refer to Figures 2 and 3, each pole 21b has a sinking portion 211, and the sinking portion 211 is lower than the pole shoe 21c; that is, the lowest position of the sinking portion 211 is lower than the pole shoe. 21c is adjacent to the base plate 11 . The invention does not limit the type of the sinking portion 211. For example, in this embodiment, each of the poles 21b can extend radially outward from the outer edge of the central ring 21a, and each of the poles 21b may have a turning portion 212, and the sinking portion 211 and the pole piece 21c may be connected by the turning portion 212, so that the pole piece 21c and the pole piece 21b may be roughly Z-shaped. In this way, please refer to FIG. 4, the sinking portion 211 is not only easy to form, but also forms an axial distance D1 (that is, the height difference of the same surface) between the sinking portion 211 and the pole shoe 21c, and The axial distance D1 is less than or equal to about 1 mm, so as to provide a relatively large winding space for a winding group 22 to be wound and combined with the sunken portion 211 of the plurality of poles 21 b. Moreover, after the iron core 21 is assembled to the shaft tube 121, the upper surface S1 of the pole 21b to the top surface F of the shaft tube 121 may have a first height H1, and the lower surface S2 of the pole 21b to the shaft The bottom edge 14 of the tube 121 protruding from the base 1 may have a second height H2, and the first height H1 is preferably greater than the second height H2.

Please refer to Figures 1 and 4, the winding group 22 of this embodiment can be wound and combined with the several sinking parts 211 in a radial winding manner, and the sinking part 211 is lower than the pole shoe The design of 21c enables the coil of the winding group 22 to be wound a few more times, so as to generate enough magnetic effect when electrified, so as to actuate the rotor 3 to rotate efficiently. In addition, after the winding group 22 is wound and combined with the plurality of poles 21b, the top T of the winding group 22 preferably does not exceed the top surface F of the shaft tube 121, so that the top T of the winding group 22 reaches The top surface F of the shaft tube 121 may have an axial distance D2 of about 0.1-1 mm. Again, the surface of the iron core 21 of the present embodiment can also have a vacuum coating insulation layer, so that the stator 2 does not need to be provided with a plastic insulating sleeve, which can prevent the short circuit between the winding group 22 and the iron core 21, and the vacuum The coated insulating layer will hardly increase the thickness of the stator 2, so that the stator 2 can be used in thin motors.

Referring again to FIGS. 1 and 3 , the rotor 3 has a shaft 31 rotatably connected to the shaft tube inner assembly 122 of the shaft joint 12 , and the shaft 31 passes through the center ring 21 a of the iron core 21 . The rotating shaft 31 is connected to a hub 32 , and the hub 32 has a magnetic element 33 opposite to the iron core 21 to drive the whole rotor 3 to rotate under the action of the alternating magnetic field generated by the stator 2 . In this embodiment, the hub 32 can be generally in the shape of a ㄇ, and the magnetic piece 33 can be arranged on the inner peripheral surface of the hub 32, so that the magnetic piece 33 can be in diameter with the several pole pieces 21c of the iron core 21. To relative. Also, since the present embodiment chooses to apply the thin motor to a heat dissipation fan, the rotor 3 can also have several fan blades 34, and the several fan blades 34 are located on the outer periphery of the hub 32 to rotate on the rotor 3 However, the configuration of the plurality of fan blades 34 is not the key point of this case, so its structural configuration will not be described in detail here, nor is it limited to the configuration disclosed in the drawings.

Please refer to Fig. 3, because the thin motor of this embodiment has a stator 2 designed to make the sinking portion 211 of the iron core 21 lower than the pole shoe 21c, so that the coil of the winding group 22 can have a relatively high Ample winding space; and after assembly, the uppermost part of the winding group 22 can still maintain a proper distance from the rotor 3, ensuring that the winding group 22 will not affect the combination depth of the rotating shaft 31 and the shaft joint 12 , and the rotor 3 will not rub against the winding group 22 when it rotates. In this way, the rotor 3 can rotate smoothly, and the winding set 22 will not suffer from wear.

Please refer to Figures 5 and 6, which are the second embodiment of the thin motor of this invention. This embodiment is roughly the same as the above-mentioned first embodiment; in this embodiment, each pole 21b can have two turns part 212, and one turning part 212 can connect the sinking part 211 and the pole piece 21c, and the other turning part 212 can connect the sinking part 211 and the center ring 21a, so that the pole piece 21c, the pole piece The column 21b and the central ring 21a may be roughly U-shaped. In this way, the winding group 22 wound and combined with the several sinking parts 211 can be located between the two turning parts 212, and the central ring 21a and the pole piece 21c can be set at the same or different heights according to requirements. Moreover, the stator 2 of this embodiment can also be applied to the shaft connection portion 12 of a type different from that disclosed in the first embodiment, which has high practicability.

Please refer to the 7th and 8th figures, which are the iron core 21 used in the third embodiment of the thin motor of this invention. In this embodiment, the iron core 21 can be formed by stacking several silicon steel sheets P; wherein, the turning portion 212 of each silicon steel sheet P can be located between the sinking portion 211 and the pole shoe 21c, and the turning portion 212 It can be inclined, and the projection of the sunken part 211 and the pole piece 21c in the axial direction does not overlap, and the pole piece 21c and the pole piece 21b can be roughly Z-shaped. In this way, each silicon steel sheet P can not only easily form the sinking portion 211 and the turning portion 212, but also the silicon steel sheet P is less likely to break at the turning portion 212; several silicon steel sheets P with the aforementioned characteristics can also be easily formed. Stacking assembly helps to improve the convenience and efficiency of assembly. Wherein, the iron core 21 can be stamped and formed after stacking several silicon steel sheets P, so that there will be no problems in subsequent assembly.

Please refer to the 9th and 10th figures, which are the iron core 21 used in the fourth embodiment of the thin motor of this invention. In this embodiment, the iron core 21 is also formed by stacking several silicon steel sheets P; wherein, the shape of each silicon steel sheet P can be similar to that of the aforementioned second embodiment and has two turning portions 212, and each turning The shape of the portion 212 is similar to that of the aforementioned third embodiment, forming an inclined shape, and the projection of the sunken portion 211 and the pole piece 21c or the center ring 21a in the axial direction does not overlap. In this way, the silicon steel sheet P of this embodiment can also be easily formed, and is not easy to break at the turning portion 212 , and also has the effect of being easy to stack and assemble.

To sum up, in the thin motor of this invention, the iron core of the stator has a sunken part lower than the pole piece for the winding and bonding of the winding group, so that the winding space of the winding group is sufficient, and there is no need to reduce the winding The number of turns can also maintain an appropriate distance from the rotor without interference, thereby ensuring that the rotor will not rub against the winding group when rotating, so that the thin motor can perform normally, and the winding group will not suffer from wear and tear. It has the effects of improving the smooth operation and service life of the thin motor.

Although this creation has been disclosed by using the above-mentioned preferred embodiments, it is not intended to limit this creation. Anyone who is familiar with this technology can make various changes and modifications relative to the above-mentioned embodiments without departing from the spirit and scope of this creation. Therefore, the scope of protection of this creation shall include all changes within the meaning and equivalent scope recorded in the appended scope of patent application.

1: Base 11: Bottom plate 12: Shaft connection 121: shaft tube 122: Shaft tube inner assembly 13: Circuit board 14: bottom edge 2: Stator 21: iron core 21a: Center Ring 21b: Pole 21c: Pole shoe 211: sinking part 212: Turning Department 22: Winding group 3: rotor 31: Shaft 32: hub 33: Magnetic parts 34: fan blade D1, D2: Axial spacing F: top surface H: axial height H1: first height H2: second height P: silicon steel sheet S1: upper surface S2: lower surface T: top

[Picture 1] An exploded perspective view of the first embodiment of this creation. [Fig. 2] A three-dimensional view of the stator core of the first embodiment of the invention. [Fig. 3] The side sectional view of the first embodiment of this creation. [Figure 4] Partial enlarged view of area A in Figure 3. [Fig. 5] A three-dimensional view of the stator core of the second embodiment of the invention. [Fig. 6] The side sectional view of the second embodiment of this creation. [Fig. 7] An exploded perspective view of the stator core of the third embodiment of the invention. [Fig. 8] It is an assembled perspective view of the stator core of the third embodiment of the invention. [Figure 9] An exploded perspective view of the stator core of the fourth embodiment of the invention. [Fig. 10] An assembled perspective view of the stator core of the fourth embodiment of the present invention.

1: Base

11: Bottom plate

12: Shaft connection

121: shaft tube

122: Shaft tube inner assembly

13: Circuit board

14: bottom edge

2: Stator

21: iron core

21a: Center ring

21b: Pole

21c: Pole shoe

211: sinking part

212: Turning Department

22: Winding group

3: rotor

31: Shaft

32: hub

33: Magnetic parts

34: fan blade

P: silicon steel sheet

Claims (15)

A motor stator, comprising: an iron core having a plurality of poles disposed around a central ring, each pole having a free end connected to a pole piece, each pole having a sunken portion lower than the pole piece; and A winding group is wound and combined with the sinking parts of the plurality of poles. The motor stator according to claim 1, wherein the iron core is formed by a single silicon steel sheet. The motor stator according to claim 1, wherein each of the poles extends radially outward from the outer edge of the central ring, each of the poles has a turning portion, and the turning portion connects the sinking portion and the pole piece. The motor stator according to claim 3, wherein the iron core is formed by stacking several silicon steel sheets, the turning portion is inclined, and the sunken portion does not overlap with the axial projection of the pole piece. The motor stator according to claim 1, wherein each of the poles has two turning parts, one turning part connects the sinking part and the pole shoe, and the other turning part connects the sinking part and the center ring, and the winding The group is located between the two turning parts. The motor stator according to claim 5, wherein the iron core is formed by stacking several silicon steel sheets, the turning portion is inclined, and the sunken portion does not overlap with the axial projection of the pole piece or the central ring. The motor stator according to any one of claims 1 to 6, wherein an axial distance is formed between the sunken portion and the pole piece, and the axial distance is less than or equal to 1 mm. The motor stator according to any one of claims 1 to 6, wherein the winding group is wound and combined with the plurality of sunken portions in a radial winding manner. The motor stator according to any one of claims 1 to 6, wherein the iron core has a vacuum-coated insulating layer on its surface. A thin motor comprising: a base having a shaft joint; A motor stator as in any one of claims 1 to 9, located on the outer periphery of the shaft joint; and A rotor is rotatably connected to the shaft joint. The thin motor according to claim 10, wherein the rotor has a magnetic member radially opposed to the pole pieces of the iron core. The thin motor according to claim 10, wherein the shaft connection part has a shaft tube, and the axial height of the shaft tube is 2-9 mm. The thin motor according to claim 10, wherein the shaft connection part has a shaft tube, the upper surface of the pole post has a first height to the top surface of the shaft tube, and the bottom surface of the pole post protrudes from the shaft tube The bottom edge of the base has a second height, and the first height is greater than the second height. The thin motor according to claim 10, wherein the shaft joint has a shaft tube, and the top of the winding group does not exceed the top surface of the shaft tube. The thin motor according to claim 14, wherein there is an axial distance of 0.1-1 mm from the top of the winding group to the top surface of the shaft tube.

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