TWM481541U - Thinning axial air-gap type motor - Google Patents

Description

Thinned axial air gap motor

The present invention relates to a motor, and more particularly to a thinned motor having an axial air gap type structural design.

Electric motor, also known as a motor or electric motor, is an electrical device that converts electrical energy into mechanical energy and can use mechanical energy to generate kinetic energy to drive other devices. Most electric motors generate energy in the motor through the magnetic field and winding current. Electric motors have been used in a variety of fields to provide power.

As electronic products are becoming more and more trend toward thinner gauges, the thickness of motors is also becoming thinner and thinner. For example, a fan motor used for heat dissipation has been commonly installed in electronic products such as desktop computers, notebook computers, and tablet computers to dissipate heat of electronic components. As another example, a small pump is used to drive the cooling liquid in the heat pipe heat dissipation structure.

In order to make the motor thinner, the prior art has the motor stator and its coil set of the Republic of China Publication No. TW201103234 regarding a motor structure of a flexible circuit board coil (FPCoil), which is a plurality of steel sheets stacked on each other for the conventional motor stator. The composition of the sheet is difficult to reduce the overall axial height. However, such a structure requires a combination of a circuit board process, and the manufacturing process and structure are very complicated, resulting in high cost and the like.

The present embodiment is to provide a thinned axial air gap motor in which the arrangement of the stator groups is changed to reduce the overall height to facilitate the thinning of the motor.

In order to achieve the above, a thinned axial air gap motor provided by one embodiment of the present invention includes a base; a circuit unit is disposed on the base; and the certain sub-group includes at least one flat a magnetically permeable frame and at least one winding set, the magnetic conductive frame has at least one arm, and an inductive magnetic portion connected to the at least one arm, the winding set is disposed around the arm; a rotor set a flat permanent magnet is disposed above the inductive magnetic portions; an orthographic projection range of the permanent magnet corresponds to an area of the inductive magnetic portion, wherein the at least one winding group is located outside the permanent magnet; and a pivot assembly The shaft assembly includes a bearing sleeve and a shaft inserted into the bearing sleeve for rotating the rotor assembly relative to the base.

The beneficial effect of the present invention may be that the stator set of the present embodiment is disposed in the axial direction parallel to the rotor group to form an axial air gap structure; in addition, the winding group is moved to the outer side of the permanent magnet, reducing the winding The height occupied by the line group can even reduce the height occupied by the board, and it is easy to thin the motor.

In order to further understand the features and technical contents of the present invention, please refer to the following detailed description and drawings of the present invention. However, the drawings are only for reference and explanation, and are not intended to limit the creation.

10‧‧‧ Pedestal

101, 101b‧‧‧ openings

102‧‧‧Axis hole

20‧‧‧ circuit unit

21‧‧‧ boards

210, 210b‧‧‧ winding hole

22‧‧‧Electronic components

30‧‧‧ bearing sleeve

31‧‧‧ shaft tube

32‧‧‧shims

33‧‧‧ bearing

40‧‧‧Axis

50, 50a, 50b, 50c, 50d, 50e‧‧ ‧ stator group

52, 52a, 52b, 52c, 52d, 52e‧‧‧ magnetically permeable frame

521‧‧‧Connecting arm

523‧‧‧Outer arm

525, 527, 529‧‧ ‧ induction magnetic parts

5251, 5253, 5255‧‧‧ Magnetic Field Change Department

54, 54a, 54b, 54c, 54d, 54e‧‧‧ winding group

60‧‧‧ permanent magnet

G‧‧‧ compartment

1 is an exploded perspective view of a thinned axial air gap motor of the first embodiment of the present invention.

2 is a perspective assembled view of the thinned axial air gap motor of the first embodiment of the present invention.

Figure 3 is a perspective cross-sectional view taken along line 3-3 of Figure 2 of the first embodiment of the present invention.

Figure 4 is a plan view of Figure 3.

Figure 5 is a plan view of the stator assembly of the first embodiment of the present invention.

Figure 6 is an exploded perspective view of the thinned axial air gap motor of the second embodiment of the present invention.

Figure 7 is a plan view of the stator assembly of the second embodiment of the present invention.

Figure 8 is a perspective assembled view of the thinned axial air gap motor of the second embodiment of the present invention.

Figure 9 is a perspective cross-sectional view of the second embodiment of the present invention taken along line 9-9 of Figure 8.

Figure 10 is a plan view of Figure 9.

Figure 11 is an exploded perspective view of the thinned axial air gap motor of the third embodiment of the present invention.

Figure 12 is a perspective assembled view of a thinned axial air gap motor of the third embodiment of the present invention.

Figure 13 is an exploded perspective view of the thinned axial air gap motor of the fourth embodiment of the present invention.

Figure 14 is a plan sectional view showing a fourth embodiment of the present invention.

Figure 15 is an exploded perspective view of the thinned axial air gap motor of the fifth embodiment of the present invention.

Figure 16 is a plan sectional view showing a fifth embodiment of the creation.

Figure 17 is an exploded perspective view of the thinned axial air gap motor of the sixth embodiment of the present invention.

Figure 18 is a plan sectional view showing a sixth embodiment of the present invention.

[First Embodiment]

Please refer to FIG. 1 and FIG. 2 , which are exploded and combined views of the thinned axial air gap motor of the present invention. The thinned axial air gap motor of the present embodiment is hereinafter referred to simply as an axial air gap type motor. The axial air gap motor includes a base 10, a circuit unit 20, a bearing sleeve 30, a shaft center 40, a certain subset 50, and a rotor assembly. The design of the present invention can be applied to motors, water pumps, fans, etc., and is particularly applicable to electronic components that require a reduced thickness to achieve a thinner thickness.

In the present embodiment, the base 10 is only shown in the shape of a circular plate, mainly as a part of the housing of the motor. The base 10 may be a metal plate or a plate made of plastic material.

The circuit unit 20 is disposed on the base 10. The circuit unit 20 includes a circuit board 21 and at least one electronic component 22 disposed on the circuit board 21.

The shaft center 40 of the embodiment is vertically affixed to the base 10, and the bottom end of the shaft center 40 is fixedly disposed on an axial hole 102 of the base 10 (refer to FIG. 3). Preferably, the fixing manner of the shaft center 40 may be fixed to the shaft hole 102 by welding, whereby the bearing sleeve 30 is sleeved upside down on the shaft core 40, and the height of the entire motor can be reduced. The rotor assembly of the embodiment includes at least the bearing sleeve 30 and a top surface of the bearing sleeve 30 Permanent magnet 60. In addition, according to the needs of the motor, plus other components, for example, the permanent magnet 60 can be added to the hub, and the fan can be added to the periphery of the hub to form a fan or pump. The bearing sleeve 30 is sleeved on the shaft core 40.

However, the manner in which the shaft 40 of the present invention is fixed is not limited to the above embodiment. For example, the shaft 40 may be first fixed to the center of a cup-shaped sleeve (not shown), and the bottom end of the shaft 40 may be The welding method is fixed to the central hole of the sleeve seat. Then, the sleeve seat is fixed to a sleeve opening of the base 10 (not shown).

Further, it is to be noted that the present creation is not limited to the above-described embodiment of the shaft-inverted motor, that is, the bearing sleeve 30 is sleeved upside down on the shaft center 40. The bearing sleeve 30 and the shaft center 40 can be considered as a pivot assembly for the rotor assembly to rotate relative to the base 10. The pivot assembly can be disposed between the base 10 and the rotor set in a reverse or forward direction. For example, the axis 40 may also be a forward direction, wherein the top end of the shaft 40 is fixed to the center of the permanent magnet 60 or the hub (not shown), and the bearing sleeve 30 is oppositely disposed on the base 11, and the bottom end of the shaft 40 is inserted. Within the bearing sleeve 30, the rotor assembly can be rotated relative to the base 10. In such an embodiment, the permanent magnet 60 and the axis 40 can be considered a rotor set. In other words, the present invention can provide a pivot assembly between the rotor assembly and the base 10 in a forward or reverse direction for the rotor assembly to rotate relative to the base 10.

One of the features of the present invention is that the structure of the stator assembly 50 is changed. The stator assembly 50 is a flat structure, and the winding group 54 is moved outward to the outside of the permanent magnet 60, whereby the overall occupied height can be reduced. Further, the permanent magnet 60 is also flat (in this embodiment, a disk shape) and is placed above the stator group 50 in the axial direction of the shaft center 40 to form an axial air gap structure. In other words, the air gap (air gap) between the stator group 50 and the rotor group for freely rotating the rotor group is the direction along the axis 40.

Taking the present embodiment as an example, the stator assembly 50 has a pair of flat magnetic conductive frames 52 and a pair of winding sets 54. Each of the magnetic conductive frames 52 includes a U-shaped arm and an inductive magnetic portion 525 at the end of the arm, and the winding group 54 is wound around the arm. The U-shaped arm of the present embodiment has an outer arm portion 521 and a pair of connecting arm portions 523, and one end of each of the connecting arm portions 523 is coupled to the outer arm portion 521, respectively. At both ends, the other end of each connecting arm portion 523 is connected to an inductive magnetic portion 525. The orthographic projection range of the permanent magnet 60 corresponds to the area of the inductive magnetic portion 525. The arm of the magnetic conductive frame 52 of the present invention is not limited to the above shape, and may have various shapes such as an I-shape, a T-shape, a U-shape, etc., and is not limited thereto, as long as it is available for winding and located. The outer side of the permanent magnet 60. The arm may include an outer arm portion and a connecting arm portion, the connecting arm portion connecting the outer arm portion and the inductive magnetic portion.

The outer arm portion 521 and the connecting arm portion 523 are linear in the embodiment. Each of the magnetic conductive frames 52 is provided with a winding group 54 disposed around the outer arm portion 521. The pair of connecting arm portions 523 are connected to the outer side. The two ends of the arm portion 521 are connected to an inductive magnetic portion 525 at the other end of each of the connecting arm portions 523. The shape of the inductive magnetic portions 523 is preferably corresponding to the permanent magnets 60. In this embodiment, the permanent magnets 60 are arranged in an annular shape to correspond to the annular shape. The magnetic conductive frame 52 may be a stacked silicon steel sheet or an integrally formed magnetic metal powder.

The winding group 54 is mainly composed of an insulating carrier and a coil (not shown), and the number thereof may be at least one. The winding group 54 in this embodiment is located outside the permanent magnet 60, whereby the permanent magnet 60 can be brought closer to the substrate 10, so that the overall height of the motor is further lowered.

The stator set of the present invention is two sets of magnetically permeable frames 52 and winding sets 54 oppositely arranged, which are four slots and four poles. However, it is not limited to the above embodiments. For example, there may be only one U-shaped magnetic conductive frame 52 and at least one winding group. The magnetic conductive frame 52 has two inductive magnetic portions which are substantially semicircular and opposed to each other, and become a single-phase two-slot dipole. . Or it may be a three-phase arrangement, with three slots to two poles, or three slots to four poles; or six slots to four poles, or six slots to eight poles. In short, the stator assembly may include at least one arm, a plurality of induction magnetic portions connected to the at least one arm, and at least one winding group correspondingly disposed on the at least one arm, the induction magnetic portions Surrounds the periphery of the axis.

The permanent magnets 60 of the rotor set are arranged in an annular shape and correspondingly disposed above the inductive magnetic portions 523 to generate an axial air gap, wherein the winding group 54 is located in the permanent magnet The outer side of the iron 60. After the excitation is applied to the winding group 54, the magnetic field is distributed to the curved induction magnetic portion 523, and the permanent magnet 64 in the axial direction generates a suction or repulsive force to rotate the rotor assembly. The inductive magnetic portion 523 of the present embodiment can also shield the magnetic field of the permanent magnet 64 from affecting other components of the electronic device. Compared with the conventional motor, the embodiment does not need to configure the back iron.

The perspective view of the present combination is shown in FIG. 2, and referring to FIG. 3 and FIG. 4, it is a cross-sectional view taken along line 3-3 of FIG. 2 according to the embodiment. The bearing sleeve 30 includes a shaft tube 31, a gasket 32 disposed on the inner surface of the shaft tube 31, and a bearing 33. One end (bottom end) of the shaft center 40 is welded to the base 10, and the other end (top end) abuts against the spacer 32. Such a structural arrangement can be referred to as an axial inverted type. The overall height of the motor is equal to the height of the shaft 40, the thickness of the spacer 32, and the total of the top wall of the shaft tube 31. This embodiment can reduce the thickness of the motor.

The stator assembly 50 of the present embodiment is placed on the circuit board 21 of the circuit unit 20. In order to further reduce the height of the motor, the circuit board 21 of the circuit unit 20 forms a winding receiving hole 210 to receive a portion. The winding set 54. In addition, the susceptor 10 can also form an opening 101 corresponding to the winding receiving hole 210, and the winding group 54 is partially placed in the opening 101.

Please refer to FIG. 5 , which is a schematic diagram of removing the permanent magnet according to FIG. 2 . The stator assembly of the present embodiment can be regarded as a four-slot quadrupole. The electronic component 22 of the circuit unit 20 can be disposed in a compartment between the inductive magnetic portions 525. The electronic component 22 can include a control component that controls the magnetic change of the inductive magnetic portion 525. And an inductive element that senses the permanent magnet 64, such as a hall element. In this embodiment, by moving the winding group 54 to the outer side of the permanent magnet 60, compared with the conventional m-shaped silicon steel sheet and the winding group, the embodiment reduces the height occupied by the winding group, and the remaining magnetic portion is left. The permanent magnet and the height of the gap between the two, so this creation can thin the motor.

In order to fix the magnetic conductive frame 52 and the winding group 54 of the stator assembly 50 on the base 10, when the base 10 is made of a metal material, it can be fixed by riveting, fitting, welding, or locking. When the susceptor 10 is made of plastic material, it can be melted and buried by heat. Shooting...etc.

The stator sets of the different embodiments of the present creation will be exemplified separately below.

[Second embodiment]

Please refer to FIG. 6, which is an exploded perspective view of the thinned axial air gap motor of the second embodiment of the present invention. The stator set 50a of the present embodiment is also composed of two sets of magnetically permeable frames 52a and two sets of windings 54a, which form a four-slot four-pole arrangement. Each of the outer magnetic arms 52a has two outer arm portions 521 which are oppositely arranged and linear. Each outer arm portion 521 is wound around a winding group 54a, and each of the outer end portions 521 is connected to one end. The connecting arm portions 523 are connected to an inductive magnetic portion 527, 529, and the inductive magnetic portions 527, 529 are arranged to form an annular shape.

Please refer to FIG. 7 , which is a schematic diagram of removing the permanent magnet according to FIG. 6 . In the stator group 50a of the embodiment, the inductive magnetic portions 527 and 529 arranged in an annular shape form a gap g between each two adjacent sensing magnetic portions 527 and 529, and the spacers g and The diametrical direction of the axis 40 is at an angle. With the above-described oblique groove g, the present embodiment can prevent the rotor group from causing a starting dead angle.

Please refer to FIG. 8 , which is a perspective assembled view of a thinned axial air gap motor according to a second embodiment of the present invention. 9 and 10 are cross-sectional views of the second embodiment of the present invention taken along line 9-9 of Fig. 8. The bearing sleeve 30 includes a shaft tube 31, a gasket 32 disposed on the inner surface of the shaft tube 31, and a bearing 33. One end (bottom end) of the shaft center 40 is welded to the base 10, and the other end (top end) abuts against the spacer 32.

[Third embodiment]

Please refer to FIG. 11 and FIG. 12 for an exploded perspective view and a perspective assembled view of a thinned axial air gap motor according to a third embodiment of the present invention. The difference from the second embodiment is that each of the magnetic conductive frames 52b of the stator set 50b has two oppositely disposed and linear outer side arm portions 521, and each of the outer side arm portions 521 is connected to a connecting arm portion at each end. 523, each of the connecting arm portions 523 is wound around a winding group 54b, and each connecting arm portion 523 is connected to an inductive magnetic portion 527, 529, and the inductive magnetic portions 527, 529 are arranged to form an annular shape.

In order to further reduce the height of the motor, the circuit board 21 of the circuit unit 20 forms a winding receiving hole 210b to accommodate a portion of the winding group 54b. In addition, the base 10 defines an opening 101b corresponding to the winding receiving hole 210b, and the winding group 54b is partially placed in the opening 101b.

Similar to the above embodiment. In the stator group 50b of the embodiment, the inductive magnetic portions 527 and 529 arranged in an annular shape form a gap g between each two adjacent sensing magnetic portions 527 and 529, and the spacers g and The diametrical direction of the axis 40 is at an angle. By the above-mentioned oblique groove g, an uneven air gap is caused, and the rotor group can be prevented from causing a dead point. When the motor is at the dead point, the generated torque is exactly equal to zero. At this time, if the motor carries a frictional load, it may stop at the dead point or even start again.

[Fourth embodiment]

Please refer to FIG. 13 and FIG. 14 , which are exploded perspective and plan cross-sectional views of the thinned axial air gap motor according to the third embodiment of the present invention. The difference from the second embodiment is that each of the magnetic conductive frames 52c of the stator set 50c has two oppositely disposed linear arms 521, and each of the outer arms 521 is connected to a connecting arm at each end. 523, each of the outer arm portions 521 is wound around a winding group 54c, and each connecting arm portion 523 is connected to an inductive magnetic portion 525, and the inductive magnetic portions 525 are arranged to form an annular shape. A magnetic field changing portion 5251 is formed on an upper surface of each of the inductive magnetic portions 525. The magnetic field changing portion 5251 is formed in a convex shape from the top surface of the inductive magnetic portion 525 in this embodiment, and its function also prevents the rotor group from causing a starting dead angle.

[Fifth Embodiment]

15 and FIG. 16 are an exploded perspective view and a plan cross-sectional view of a thinned axial air gap motor according to a fifth embodiment of the present invention. In this embodiment, each of the magnetic conductive frames 52d of the stator assembly 50d has two oppositely disposed linear arms 521, and each of the outer ends 521 is connected to a connecting arm 523 at each end. Each of the outer arm portions 521 is wound around a winding group 54d. Each connecting arm portion 523 is connected to an inductive magnetic portion 525, and the inductive magnetic portions 525 are arranged to form an annular shape. Each of these inductions An edge of the magnetic portion 525 is bent upward in the axial direction to form a magnetic field changing portion 5253. Thereby, the air gap of the magnetic conducting frame 52d and the permanent magnet 60 is locally reduced, and the rotor group is deflected by an angle, which functions to prevent the rotor group from causing a starting dead angle.

[Sixth embodiment]

17 and FIG. 18 are exploded perspective and plan cross-sectional views of the thinned axial air gap motor of the sixth embodiment of the present invention. In this embodiment, each of the magnetic conductive frames 52e of the stator set 50e has two oppositely disposed linear arms 521, and each of the outer ends 521 is connected to a connecting arm 523 at each end. Each of the outer arm portions 521 is wound around a winding group 54e. Each connecting arm portion 523 is connected to an inductive magnetic portion 525, and the inductive magnetic portions 525 are arranged to form an annular shape. An edge of each of the inductive magnetic portions 525 is bent upward in the axial direction and extends horizontally to form a magnetic field changing portion 5255. Thereby, the air gap of the magnetic conductive frame 52e and the permanent magnet 60 is locally reduced, and the rotor group is deflected by an angle, which functions to prevent the rotor group from causing a starting dead angle.

The magnetic field changing portion of the above embodiment may be formed by partially bending the inductive magnetic portion in a stamping manner. However, the present invention is not limited thereto. For example, the top surface of the inductive magnetic portion may be partially protruded upward as long as the magnetic conductive frame is The axial air gap between the permanent magnets is not uniform, and the rotor group is deflected to achieve the problem of avoiding a dead point.

[Possible effects of the examples]

In summary, the beneficial effect of the present invention may be that the structural design provided by the present embodiment reduces the height occupied by the winding group compared to the conventional m-shaped silicon steel sheet plus the winding group. It can reduce the height occupied by the board and make it easy to thin the motor. The inductive magnetic portion can shield the magnetic field of the permanent magnet, and this embodiment does not require the configuration of the back iron as compared with the conventional motor. In addition, the magnetic field change portion can be easily formed by the flat magnetic conductive frame of the present invention, which can prevent the rotor group from causing a starting dead angle.

The above description is only a preferred and feasible embodiment of the present invention, and thus does not limit the scope of the patent of the creation, so the equivalent technique of using the creation specification and the schema content is used. Changes are included in the scope of this creation.

10‧‧‧ Pedestal

101‧‧‧ opening

20‧‧‧ circuit unit

21‧‧‧ boards

210‧‧‧Wounding hole

22‧‧‧Electronic components

30‧‧‧ bearing sleeve

40‧‧‧Axis

50‧‧‧stator group

52‧‧‧Magnetic framework

521‧‧‧Connecting arm

523‧‧‧Outer arm

525‧‧‧Induction magnetic part

54‧‧‧ Winding Group

60‧‧‧ permanent magnet

Claims (12)

A thinned axial air gap motor comprising: a base; a circuit unit disposed on the base; a certain subset comprising at least one flat magnetically permeable frame and at least one winding set, the magnetically permeable frame Having at least one arm and an inductive magnetic portion connected to the at least one arm, the winding group is disposed around the arm; a rotor group including a flat permanent magnet disposed above the sensing magnetic portions The positive projection range of the permanent magnet corresponds to the area of the induction magnetic portion, wherein the at least one winding group is located outside the permanent magnet; and a pivot assembly is disposed between the base and the rotor set, the shaft The pivot assembly includes a bearing sleeve and a shaft inserted into the bearing sleeve for rotation of the rotor assembly relative to the base. The thinned axial air gap motor of claim 1, wherein the arm of each of the magnetic conductive frames comprises an outer arm portion and a connecting arm portion, the connecting arm portion connecting the outer arm portion and the inductive magnetic portion . The thinned axial air gap type motor of claim 2, wherein the arm has a U shape, has one outer arm portion, and a pair of the connecting arm portions, wherein one end of each of the connecting arm portions is respectively connected to The two ends of the outer arm portion are connected to one of the sensing magnetic portions at the other end of each of the connecting arm portions. The thinned axial air gap motor of claim 3, wherein each of the outer arm portions is provided with one winding group, wherein the sensing magnetic portions are arranged to form an annular shape, wherein the permanent magnet is a ring shape. The thinned axial air gap type motor of claim 3, wherein each of the connecting arm portions is provided with one winding group, wherein the sensing magnetic portions are arranged to form an annular shape, wherein the permanent magnet is a ring shape. The thinned axial air gap motor of claim 1, wherein the bearing sleeve is fixed to a center of the permanent magnet, wherein the base forms an axial hole, the axial center The bottom end is welded and fixed to the shaft hole, and the bearing sleeve is sleeved on the shaft center. The thinned axial air gap motor of claim 1, wherein the circuit unit comprises a circuit board and at least one electronic component disposed on the circuit board; wherein the stator group is disposed on the circuit board of the circuit unit Upper, the circuit board forms a winding receiving hole to receive a portion of the winding group. The thinned axial air gap motor of claim 7, wherein the base forms an opening corresponding to the winding receiving hole, and the winding group is partially placed in the opening. The thinned axial air gap motor of claim 1, wherein the stator set has a plurality of inductive magnetic portions arranged in an annular shape, and a gap is formed between each of the two adjacent inductive magnetic portions. The spacers are at an angle to the diameter of the axis. The thinned axial air gap motor of claim 1, wherein the stator set has a plurality of inductive magnetic portions arranged in an annular shape, and an upper surface of each of the inductive magnetic portions forms a magnetic field change portion. The thinned axial air gap motor of claim 10, wherein the magnetic field varying portion is formed by bending an edge of the inductive magnetic portion upward. The thinned axial air gap motor of claim 10, wherein the magnetic field change portion is formed by a protrusion from a top surface of the induction magnetic portion.