TWI575846B - Motor structure and its rotor - Google Patents

Description

Motor structure and its rotor

The present invention relates to a motor structure and a rotor therefor.

When the stator of the conventional motor structure is installed in the motor casing, it is often blocked by other internal components and cannot be configured better, which leads to an increase in the overall thickness of the conventional motor structure.

If the stator is mounted in a preferred configuration without any obstruction, the overall thickness of the conventional motor structure can be made thin.

In order to achieve the above objectives, it is necessary to provide an innovative and progressive motor structure and its rotor to solve the above problems.

The invention provides a motor structure comprising a shaft seat, a stator and a rotor. The stator is sleeved on the shaft seat. The rotor includes a hollow housing, an annular magnetic pole, a flow guiding cover and a rotating shaft. The hollow housing is for accommodating the stator, and the hollow housing has an inner wall surface. The annular magnetic pole is disposed on an inner wall surface of the hollow casing, and the annular magnetic pole includes a plurality of permanent magnets, and the permanent magnets are arranged in a ring shape. The flow guiding cover is disposed at one end of the hollow casing, the flow guiding cover has a ring seat, and the inner diameter of the ring seat is greater than or equal to the inner diameter of the annular magnetic pole. The rotating shaft is pivotally disposed on the shaft seat, and one end of the rotating shaft is coupled to the flow guiding cover.

The invention further provides a rotor comprising a hollow casing, an annular magnetic pole, a flow guiding cover and a rotating shaft. The hollow housing has an inner wall surface. The annular magnetic pole is disposed on an inner wall surface of the hollow casing, and the annular magnetic pole includes a plurality of permanent magnets, and the permanent magnets are interposed Arranged in a ring shape. The flow guiding cover is disposed at one end of the hollow casing, the flow guiding cover has a ring seat, and the inner diameter of the ring seat is greater than or equal to the inner diameter of the annular magnetic pole. One end of the shaft is coupled to the flow guide cover.

By controlling the inner diameter of the ring seat to be greater than or equal to the inner diameter of the annular magnetic pole, the stator can be prevented from being blocked by the ring seat during installation, thereby further thinning the overall thickness of the motor structure.

The embodiments of the present invention can be more clearly understood, and the objects, features, and advantages of the present invention will become more apparent. The details are as follows.

1‧‧‧Motor structure of the invention

10‧‧‧ shaft seat

20‧‧‧ Stator

20S‧‧‧ wire trough

30‧‧‧Rotor

31‧‧‧ hollow shell

31E‧‧‧ one end of the hollow shell

31S‧‧‧ inner wall

32‧‧‧Circular magnetic pole

321‧‧‧ permanent magnet

321S‧‧‧ surface

32R‧‧‧inscribed circular track

33‧‧‧ diversion cover

331‧‧‧ ring seat

331A‧‧‧ upper surface

331B‧‧‧ lower surface

331C‧‧‧ inner edge

332‧‧‧ Positioning parts

332A‧‧‧guide surface

332E‧‧‧ insertion end

332S‧‧‧ end face

333‧‧‧Dust-proof paddles

334‧‧‧Central Seat

335‧‧‧ fixed column

335H‧‧‧Axis hole

335S‧‧‧ top surface

34‧‧‧ shaft

34E‧‧‧ one end of the shaft

D1‧‧‧ ring seat inner diameter

D2‧‧‧ Inner diameter of the annular magnetic pole

G‧‧‧ gap

T‧‧‧ thickness of the positioning piece

Thickness of T1‧‧‧ permanent magnets

Shell thickness of T2‧‧‧ hollow shell

W‧‧‧The width of the ring

1 is a perspective exploded view of the motor structure of the present invention; FIG. 2 is a perspective sectional view of the motor structure of the present invention; FIG. 3 is a sectional view of the motor structure of the present invention taken along line AA of FIG. 2; Figure 5 shows a top view of the annular magnetic pole of the present invention; Figure 6 shows a bottom view of the rotor cover of the present invention; Figure 7 shows a perspective assembled view of the rotor of the present invention; Figure 8 shows another exploded view of the rotor of the present invention; 9 shows a bottom view of the rotor of the present invention; FIG. 10 shows a bottom view of the motor structure of the present invention (removing the shaft seat); and FIG. 11 shows another bottom view of the rotor of the present invention.

Figure 1 shows an exploded perspective view of the motor structure of the present invention. Figure 2 shows a perspective assembled view of the motor structure of the present invention. Figure 3 is a cross-sectional view showing the assembly of the motor structure of the present invention taken along line A-A of Figure 2; Referring to Figures 1, 2 and 3, the motor structure 1 of the present invention comprises a shaft seat 10, a stator 20 and a rotor 30.

The stator 20 is sleeved on the axle housing 10, and the stator 20 has a plurality of slots 20S for winding coils (not shown).

Figure 4 shows an exploded perspective view of the rotor of the present invention. Referring to FIG. 2, FIG. 3 and FIG. 4, the rotor 30 includes a hollow casing 31, an annular magnetic pole 32, a flow guiding cover 33 and a rotating shaft 34. The hollow housing 31 is for accommodating the stator 20, and the hollow housing 31 has an inner wall surface 31S.

Figure 5 shows a plan view of the toroidal magnetic pole of the present invention. Referring to FIG. 1 , FIG. 4 and FIG. 5 , the annular magnetic pole 32 is disposed on the inner wall surface 31S of the hollow casing 31 . The annular magnetic pole 32 includes a plurality of permanent magnets 321 , and the permanent magnets 321 are annularly spaced. The arrangement is such that the annular magnetic pole 32 constitutes a circle having an inner diameter. Each of the permanent magnets 321 has a surface 321S, and each of the permanent magnets 321 has a gap G therebetween. Further, the annular magnetic pole 32 defines an inscribed circular track 32R which is tangent to the surface 321S of each of the permanent magnets 321 .

Figure 6 shows a bottom view of the flow guide of the present invention. Figure 7 shows a perspective assembled view of the rotor of the present invention. Figure 8 shows another exploded view of the rotor of the present invention. Referring to FIG. 6 , FIG. 7 and FIG. 8 , the flow guiding cover 33 is disposed at one end 31E of the hollow casing 31 , and the guiding cover 33 has a ring seat 331 , a plurality of positioning members 332 , and a plurality of dustproof pickers . 333. A central socket 334 and a fixed post 335.

Referring to FIG. 3, FIG. 5 and FIG. 6, in order to prevent the ring seat 331 from blocking the installation of the stator 20, in the embodiment, the inner diameter D1 of the ring seat 331 is greater than or equal to the annular magnetic pole 32. Inner diameter D2.

Figure 9 shows a bottom view of the rotor of the present invention. Referring to FIG. 3, FIG. 4 and FIG. 9, the ring seat 331 has an upper surface 331A, a lower surface 331B and an inner edge 331C, and the inner edge 331C is not located within a circular circle formed by the inscribed circular track 32R. In order to avoid blocking the installation of the stator 20. Preferably, the inner edge 331C is flush with the inscribed circular track 32R, and the width W of the ring seat 331 is less than or equal to the thickness T1 of each of the permanent magnets 321 and the hollow shell. The sum of the shell thickness T2 of 31.

Figure 10 shows a bottom view of the motor structure (removing the shaft seat) of the present invention. Referring to FIG. 8 , FIG. 9 and FIG. 10 , the positioning members 332 are spaced apart from the lower surface 331B of the ring seat 331 , and each of the positioning members 332 is correspondingly received and disposed in each of the gaps G to prevent each of the positioning members. 332 is separated from each of the gaps G by vibration. Moreover, in the present embodiment, the positioning members 332 surround the stator 20, and the positioning members 332 do not contact the stator 20 to avoid blocking the installation of the stator 20.

Referring to FIG. 3, FIG. 8 and FIG. 9, each positioning member 332 has an insertion end 332E and an end surface 332S. Each of the end faces 332S faces the rotating shaft 34, and each of the end faces 332S is not located within a circular range formed by the inscribed circular track 32R to avoid blocking the mounting of the stator 20. Preferably, each of the end faces 332S is flush with the inscribed circular track 32R. Alternatively, referring to Figure 11, there is shown another bottom view of the rotor of the present invention. In another embodiment, each of the end faces 332S may not be flush with the inscribed circular track 32R, that is, each of the end faces 332S is located outside the circular range formed by the inscribed circular track 32R. Similarly, the inner edge 331C of the ring seat 331 may not be flush with the inscribed circular track 32R, that is, the inner edge 331C is also outside the circular range formed by the inscribed circular track 32R.

Referring to FIG. 8 and FIG. 9 , in order to prevent each of the positioning members 332 from being inserted into each of the gaps G, each of the permanent magnets 321 is scratched. In this embodiment, each of the insertion ends 332E may have at least one arcuate surface 332A. Alternatively, in another embodiment, each of the insertion ends 332E may have at least one bevel (not shown).

Referring to FIG. 6 , in order to ensure that each of the positioning members 332 has sufficient structural strength, in the embodiment, the thickness T of each of the positioning members 332 is greater than or equal to half the width W of the ring seat 331 .

Referring to FIG. 4 and FIG. 7 , the dust-proof tabs 333 are spaced apart from the upper surface 331A of the ring seat 331 , and the dust-proof tabs 333 are connected to the center socket 334 . The fixing post 335 is protruded from the central socket 334, and the fixing post 335 has a shaft hole 335H and a top surface. 335S.

Referring to FIG. 1 and FIG. 3 , the rotating shaft 34 is pivotally mounted on the shaft seat 10 , and one end 34E of the rotating shaft 34 is coupled to the guiding cover 33 . In this embodiment, one end 34E of the rotating shaft 34 is coupled to the fixing post 335 of the flow guiding cover 33. Preferably, one end 34E of the rotating shaft 34 is disposed through the shaft hole 335H and is tightly engaged with the fixing post 335. In addition, one end 34E of the shaft 34 does not protrude from the top surface 335S.

With the above configuration, the present invention can effectively prevent the stator 20 from being blocked by the ring seat 331 and the positioning members 332 during installation, thereby thinning the overall thickness of the motor structure 1 of the present invention.

The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the scope of the present invention. The scope of the invention should be as set forth in the appended claims.

10‧‧‧ shaft seat

20‧‧‧ Stator

31‧‧‧ hollow shell

31S‧‧‧ inner wall

321‧‧‧ permanent magnet

321S‧‧‧ surface

33‧‧‧ diversion cover

331‧‧‧ ring seat

331C‧‧‧ inner edge

332‧‧‧ Positioning parts

332S‧‧‧ end face

333‧‧‧Dust-proof paddles

334‧‧‧Central Seat

335‧‧‧ fixed column

335H‧‧‧Axis hole

335S‧‧‧ top surface

34‧‧‧ shaft

34E‧‧‧ one end of the shaft

Claims (34)

A motor structure comprising: a shaft seat; a stator, sleeved on the shaft seat; and a rotor comprising: a hollow housing for accommodating the stator, the hollow housing having an inner wall surface; a ring a magnetic pole is disposed on an inner wall surface of the hollow casing, the annular magnetic pole includes a plurality of permanent magnets, and the permanent magnets are arranged in a ring shape such that the annular magnetic pole forms a circle having an inner diameter; The flow cover is disposed at one end of the hollow casing, the flow guiding cover has a ring seat, and the inner diameter of the ring seat is greater than or equal to the inner diameter of the annular magnetic pole; and a rotating shaft is pivotally disposed on the shaft seat. The motor structure of claim 1, wherein the annular magnetic pole defines an inscribed circular trajectory, and each of the permanent magnets has a surface tangential to a surface of each of the permanent magnets. The motor structure of claim 2, wherein the flow guiding cover has a plurality of positioning members, the ring seat has an upper surface and a lower surface, and the positioning members are spaced apart from the lower surface. The motor structure of claim 3, wherein each of the positioning members has an end face, each of the end faces facing the rotating shaft, and each of the end faces is not located within a circular range formed by the inscribed circular track. The motor structure of claim 4, wherein each of the end faces is flush with the inscribed circular trajectory. The motor structure of claim 2, Wherein the ring seat has an inner edge which is not located within a circular range formed by the inscribed circular path. The motor structure of claim 6, wherein the inner edge is flush with the inscribed circular trajectory. The motor structure of claim 1, wherein the flow guiding cover has a plurality of positioning members, the ring seat has an upper surface and a lower surface, and the positioning members are spaced apart from the lower surface. The motor structure of claim 8, wherein each of the permanent magnets has a gap therebetween, and each of the positioning members corresponds to and accommodates each of the gaps. The motor structure of claim 8, wherein each of the positioning members has an insertion end, and each of the insertion ends has at least one guide bevel. The motor structure of claim 8, wherein each of the positioning members has an insertion end, and each of the insertion ends has at least one arcuate surface. The motor structure of claim 8, wherein the thickness of each of the positioning members is greater than or equal to half the width of the ring seat. The motor structure of claim 8, wherein the positioning members do not contact the stator. The motor structure of claim 8 wherein the locating members surround the stator. The motor structure of claim 8, wherein the flow guide cover further comprises a plurality of dustproof picks, a central socket and a fixing post, wherein the dustproof tabs are spaced apart from the upper surface of the ring seat, and the dustproof dials a piece is coupled to the central socket, the fixing post is protruded from the central seat, and the rotating shaft is One end is coupled to the fixed column. The motor structure of claim 15, wherein the fixing post has a shaft hole, and one end of the rotating shaft is disposed through the shaft hole and is tightly engaged with the fixing column. The motor structure of claim 16, wherein the mounting post has a top surface, one end of the rotating shaft not protruding from the top surface. The motor structure of claim 1, wherein the width of the ring seat is less than or equal to a sum of a thickness of each of the permanent magnets and a thickness of a casing of the hollow casing. A rotor comprising: a hollow casing having an inner wall surface; an annular magnetic pole disposed on an inner wall surface of the hollow casing, the annular magnetic pole comprising a plurality of permanent magnets, the permanent magnets being spaced apart Arranging such that the annular magnetic pole forms a circle having an inner diameter; a flow guiding cover is disposed at one end of the hollow casing, the flow guiding cover has a ring seat, and the inner diameter of the ring seat is greater than or equal to the An inner diameter of the annular magnetic pole; and a rotating shaft, one end of which is coupled to the flow guiding cover. The rotor of claim 19, wherein the annular magnetic pole defines an inscribed circular trajectory, and each of the permanent magnets has a surface tangential to the surface of each of the permanent magnets. The rotor of claim 20, wherein the flow guiding cover has a plurality of positioning members, the ring seat has an upper surface and a lower surface, and the positioning members are spaced apart from the lower surface. The rotor of claim 21, wherein each of the positioning members has an end face, each of the end faces facing the rotating shaft, and each of the end faces is not located within a circular range formed by the inscribed circular track. The rotor of claim 22, wherein each of the end faces is flush with the inscribed circular trajectory. The rotor of claim 20, wherein the ring seat has an inner edge that is not within a circular extent formed by the inscribed circular trajectory. The rotor of claim 24, wherein the inner edge is flush with the inscribed circular trajectory. The rotor of claim 19, wherein the flow guiding cover has a plurality of positioning members, the ring seat having an upper surface and a lower surface, and the positioning members are spaced apart from the lower surface. The rotor of claim 26, wherein each of the permanent magnets has a gap therebetween, and each of the positioning members corresponds to and accommodates each of the gaps. The rotor of claim 26, wherein each of the positioning members has an insertion end, and each of the insertion ends has at least one guide bevel. The rotor of claim 26, wherein each of the positioning members has an insertion end, and each of the insertion ends has at least one arcuate surface. The rotor of claim 26, wherein each of the positioning members has a thickness greater than or equal to half the width of the ring seat. The rotor of claim 26, wherein the flow guide cover further has a plurality of dust-proof tabs, a central socket and a fixing post, the dust-proof tabs are spaced apart from the upper surface of the ring seat, and the dust-proof paddles The central socket is connected to the central socket, and one end of the rotating shaft is coupled to the fixing pole. The rotor of claim 31, wherein the fixing post has a shaft hole, and one end of the rotating shaft is disposed through the shaft hole and is tightly engaged with the fixing rod. The rotor of claim 32, wherein the fixed post has a top surface, one end of the shaft does not protrude from the top surface. The rotor of claim 19, wherein the width of the ring seat is less than or equal to the sum of the thickness of each of the permanent magnets and the thickness of the casing of the hollow casing.