TW202010226A - Rotor of motor including a casing base, a rotating shaft, a fixing member and a permanent magnet - Google Patents

Abstract

The present invention relates to a rotor of a motor. The rotor of the motor includes: a casing base, a rotating shaft, a fixing member and a permanent magnet. The casing base has a base portion provided with a shaft connection portion. The shaft connection portion includes a through hole, and the through hole has a hole diameter. The rotating shaft has at least a first section. The first section has a first outer diameter. The first outer diameter is smaller than the hole diameter of the through hole, so as to prevent the rotating shaft from being scratched or deformed during installation. Furthermore, the fixing member has at least one welding portion formed by laser welding. The welding portion is provided on the shaft connection portion of the casing base at a position corresponding to the rotating shaft, so as to ensure that the casing base and the rotating shaft are firmly connected to each other. In addition, one end of the rotating shaft can protrude from the base portion for combining components such as fan wheels.

Description

Motor rotor

The invention relates to a rotor, especially a rotor of a motor that can be combined with a stator to form a motor structure.

The conventional motor is mainly composed of a rotor and a stator. The rotor of the conventional motor generally includes a hub, a rotating shaft and a permanent magnet. The rotating shaft is coupled to the center of the hub, and the permanent magnet is coupled to the inside of the hub. In this way, the rotor of the motor can be rotatably combined with the stator by using the rotating shaft to form a motor structure, and there is an air gap between the stator and the permanent magnet. After the stator is energized, an intersection can be generated with the permanent magnet The magnetic field is changed to drive the rotor of the motor to rotate.

However, the rotating shaft of the rotor of the conventional motor is mainly forced into a connecting hole of the hub in a tight fitting manner. During the process of the rotating shaft being forced through the connecting hole, the outer peripheral surface of the rotating shaft is easily damaged, resulting in Many problems, such as scratches or deformation, further reduce the rotation stability of the rotor, and also easily affect the appearance integrity and aesthetics of the rotating shaft.

The invention relates to a rotor of a motor. The rotor of the motor includes: a shell seat, a rotating shaft, a fixed piece and a permanent magnet. The base has a base portion having a first side and a second side opposite to each other, the base portion is provided with a shaft joint portion, the shaft joint portion includes a through hole, the through hole penetrates the first side and the second side , And the perforation of the shaft joint has an aperture. The rotating shaft has a first end and a second end opposite, the rotating shaft has at least a first section, the first section has a first outer diameter, the first outer diameter is smaller than the aperture of the perforation, the The rotating shaft extends through the perforation of the housing base with the first section, the first end protrudes from the first side of the base, and the second end protrudes from the second side of the base. The fixing member has at least one welding part formed by laser welding, and the welding part is disposed at a corresponding part of the shaft connecting part of the shell base and the rotating shaft to fix the shell base and the rotating shaft to each other. The permanent magnet is combined with the housing, and the permanent magnet is located on the second side of the base.

Therefore, the first outer diameter of the first section of the rotating shaft is smaller than the aperture of the perforation of the housing, so that the rotating shaft can be prevented from being scratched or deformed during installation. Moreover, the welding part can be formed by laser welding to form the welded portion, so as to effectively improve the stability of the coupling between the rotating shaft and the housing. In addition, the first end of the rotating shaft can protrude from the first side of the base portion, and is used to join a member such as a fan wheel. Thereby, the assembly convenience of the rotor, the rotation stability of the rotor, the stability of the combination of the housing and the rotating shaft, the processing convenience of the fixing member, and the breadth of use of the rotor can be improved Efficacy.

FIG. 1 shows an exploded perspective view of a rotor of a motor according to an embodiment of the invention in one direction. FIG. 2 shows an exploded perspective view of the rotor of the motor according to an embodiment of the invention in the direction of the other side. FIG. 3 shows a combined cross-sectional view of the rotor of the motor according to the first embodiment of the present invention. Referring to FIGS. 1 to 3, in one embodiment, the rotor 1 of the motor of the present invention includes a housing 10, a rotating shaft 20, a fixing member 30 and a permanent magnet 40. The rotor 1 can cooperate with a stator to form a motor structure for providing a rotating power.

The housing 10 has a base portion 11 having a first side 11a and a second side 11b opposite to each other. The base portion 11 is provided with a shaft connecting portion 111 including a through hole 111a and the through hole 111a The first side 11a and the second side 11b pass through, and the through hole 111a of the shaft connection portion 111 has an aperture D1. In addition, the shell base 10 may have an extension portion 12 that is integrally integrated with the second side 11b of the base portion 11, the extension portion 12 has an inner side wall 121, so that the shell base 10 may be formed into a hub shape, But not limited to the above.

FIG. 4 shows an enlarged cross-sectional view of the rotor of the motor according to the first embodiment of the present invention according to A1 of FIG. 3. Referring to FIGS. 3 and 4, in one embodiment, the rotating shaft 20 has a first end 20 a and a second end 20 b opposite to each other. The rotating shaft 20 has at least a first section 21 and the first section 21 It has a first outer diameter D2, which is smaller than the aperture D1 of the through hole 111a, the rotating shaft 20 extends through the through hole 111a of the housing 10 with the first section 21, and the first end 20a The first side 11a of the base 11 protrudes, and the second end 20b protrudes from the second side 11b of the base 11.

The fixing member 30 has at least one welding portion 31 formed by laser welding, and the welding portion 31 is disposed at a corresponding portion of the shaft connection portion 111 of the housing base 10 and the rotating shaft 20 for the housing base 10 And the rotating shaft 20 is fixed to each other. Where the corresponding parts of the shaft joint 111 and the rotating shaft 20 refer to various spatial positions suitable for laser welding operations between the outer periphery of the rotating shaft 20 and the shaft joint 111; and the welding portion 31 is The principle of reliably fixing the housing 10 and the rotating shaft 20 is that the rotor 1 of the motor of the present invention does not limit the number and position of the welding parts 31.

The permanent magnet 40 is combined with the housing 10, and the permanent magnet 40 may be located on the second side 11 b of the base 11. When the shell base 10 has the extension portion 12 to form a hub shape, the permanent magnet 40 can be coupled to the inner side wall 121 of the extension portion 12 to ensure a better bonding stability between the shell base 10 and the permanent magnet 40 Sex. In addition, the permanent magnet 40 may be a ring-shaped magnet; alternatively, the permanent magnet 40 may be arranged by a plurality of magnets into a ring-shaped body; or, the permanent magnet 40 may also be wound from a magnet piece into a ring, but not as described above Limited.

The rotor 1 of the motor of the present invention mainly uses the first outer diameter D2 of the first section 21 of the rotating shaft 20 to be smaller than the aperture D1 of the through hole 111a of the housing 10, so that the rotating shaft 20 does not need to be forced into The perforation 111a of the housing 10 can effectively prevent the rotating shaft 20 from being scratched or deformed. Therefore, when the rotor 1 cooperates with a stator to form a motor structure, the rotation stability of the rotor 1 can be improved, and It can also ensure the appearance integrity and aesthetics of the rotating shaft 20. In addition, the rotating shaft 20 and the housing 10 can be fixed to each other by the fixing member 30, and the fixing member 30 is formed by laser welding means to form the welding portion 31, therefore, the rotating shaft 20 and the The connection between the shell base 10 is stable, and the processing method of the welding part 31 is quite simple and the fixing effect is also good. Moreover, the first end 20a of the rotor 1 of the motor of the present invention can further protrude from the first side 11a of the base portion 11, so when the rotor 1 is applied to the motor structure, the outer side of the motor structure can be combined separately as The fan wheel and other components provide better heat dissipation or ventilation function, so that the usability of the rotor 1 is more diversified.

Based on the above structural design, several embodiments are further detailed below to illustrate various structural types of the rotor 1 of the motor of the present invention, but are not limited to the embodiments listed below.

Referring to FIG. 4, in one embodiment, there is a diameter difference between the diameter D1 of the through hole 111 a of the housing base 10 and the first outer diameter D2 of the first section 21 of the rotating shaft 20 (ie The aperture D1 minus the first outer diameter D2), the diameter difference can be greater than 0mm, and the diameter difference can be less than or equal to 0.1mm, wherein the diameter difference can preferably be further set to less than or equal to 0.02mm; In addition, in addition to avoiding the occurrence of scratches or deformation during the penetration of the rotating shaft 20 through the through hole 111a of the housing 10, it is also possible to ensure that the gap between the rotating shaft 20 and the through hole 111a is not too large to maintain An appropriate clearance makes it easy for the rotating shaft 20 to cooperate with the fixing member 30 and the housing 10 to fix each other.

With reference to FIG. 3, in an embodiment, in the axial direction of the rotating shaft 20, there is a first convex extension X between the first end 20 a of the rotating shaft 20 and the shaft connecting portion 111, and the There is a second convex elongation Y between the second end 20b and the shaft connecting portion 111, and the first convex elongation X may be greater than or equal to one-half of the second convex elongation Y; The first convex extension X of the rotating shaft 20 has a set length. Except that the second convex extension Y of the rotating shaft 20 can be combined with a stator to form a motor structure, the section of the first convex extension X will be It is easier to install various components such as fan wheels to improve the convenience of installation, and cooperate with the rotating power provided by the motor structure to provide functions such as heat dissipation or ventilation. In addition, the first convex elongation X of the rotating shaft 20 can be further set to be less than or equal to eight times the second convex elongation Y; thereby, the first convex elongation X and the second convex elongation Y A preferred range of values can be defined so that the first convex elongation X and the second convex elongation Y have a better length ratio with each other, so as to effectively improve the applicability of the rotating shaft 20.

FIG. 5 shows a combined cross-sectional view of a rotor of a motor according to a second embodiment of the invention. FIG. 6 shows an enlarged cross-sectional view of the rotor of the motor according to the second embodiment of the present invention according to A2 of FIG. 5. 7 shows a combined cross-sectional view of a rotor of a motor according to a third embodiment of the invention. FIG. 8 shows an enlarged cross-sectional view of the rotor of the motor according to the third embodiment of the present invention according to A3 of FIG. 7. With reference to FIGS. 3 and 4, in an embodiment, the housing base 10 is provided with a set of tube portions 13, and the sleeve portion 13 surrounds the perforation 111 a forming the shaft connection portion 111; wherein the sleeve portion 13 can be provided The first side 11a of the housing base 10 extends toward the first end 20a of the rotating shaft 20. Referring to FIGS. 5 and 6 again, in another embodiment, the sleeve portion 13 is disposed on the second side 11 b of the housing base 10 and extends toward the second end 20 b of the rotating shaft 20. In this way, the sleeve portion 13 can be used to surround the rotating shaft 20 to improve the stability of the coupling between the housing 10 and the rotating shaft 20, and the installation position of the sleeve portion 13 is not limited, and can be installed according to the actual Demand is determined. In addition, the rotor 1 of the motor of the present invention can also optionally omit the sleeve portion 13. With reference to FIGS. 7 and 8, in an embodiment, an embodiment in which the sleeve portion 13 is omitted is disclosed.

With reference to FIGS. 3 to 8, in an embodiment, the first section 21 of the rotating shaft 20 is adjacent to the second end 20 b, and the first end 20 a of the rotating shaft 20 to the first section 21 is between A second section 22 having a second outer diameter D3, the second outer diameter D3 is larger than the aperture D1 of the through hole 111a, the second section 22 and the first section 21 A shoulder 23 is formed at the junction, and the shoulder 23 abuts the first side 11a of the base 11. Thereby, when the rotating shaft 20 is assembled, the second end 20b of the rotating shaft 20 can pass through the through hole 111a from one side of the first side 11a of the housing base 10, so that the second end of the rotating shaft 20 20b can be relatively located on one side of the second side 11b of the housing base 10, at this time, the shoulder portion 23 is used to abut the first side 11a of the base portion 11, to ensure that the rotating shaft 20 and the housing base 10 can be preliminary Positioning, so as to subsequently form the fixing member 30 by means of laser welding, so as to reliably fix the rotating shaft 20 and the housing 10 to each other, and improve the bonding stability between the two.

9 shows a combined cross-sectional view of a rotor of a motor according to a fourth embodiment of the invention. FIG. 10 shows an enlarged cross-sectional view of the rotor of the motor according to the fourth embodiment of the present invention according to A4 of FIG. 9. With reference to FIGS. 9 and 10, in one embodiment, the first section 21 of the rotating shaft 20 is adjacent to the first end 20 a, and the second end 20 b of the rotating shaft 20 to the first section 21 There is a second section 22 which has a second outer diameter D3 which is larger than the aperture D1 of the through hole 111a, the second section 22 and the first section 21 A shoulder 23 is formed at the junction, and the shoulder 23 abuts the second side 11b of the base 11. Thereby, when the rotating shaft 20 is assembled, the first end 20a of the rotating shaft 20 can pass through the through hole 111a from one side of the second side 11b of the housing base 10, so that the first end of the rotating shaft 20 20a can be relatively located on one side of the first side 11a of the housing 10, at this time, the shoulder 23 is used to abut the second side 11b of the base 11 to ensure that the rotating shaft 20 and the housing 10 can be preliminary Positioning, so as to subsequently form the fixing member 30 by laser welding, so as to reliably couple and fix the rotating shaft 20 and the housing 10 to each other, and can also improve the bonding stability between the two.

FIG. 11 shows a combined cross-sectional view of a rotor of a motor according to a fifth embodiment of the invention. FIG. 12 shows an enlarged cross-sectional view of the rotor of the motor according to the fifth embodiment of the present invention according to A5 of FIG. 11. With reference to FIGS. 11 and 12, in one embodiment, the first section 21 is provided between the first end 20 a and the second end 20 b of the rotating shaft 20. In this way, when the rotating shaft 20 is assembled, the first end 20a of the rotating shaft 20 can be selected to extend through the through hole 111a, or the second end 20b of the rotating shaft 20 can be selected to extend through the through hole 111a. To improve the convenience of installation. Moreover, the outer peripheral surface of the rotating shaft 20 can be directly processed to form the first section 21 once, so as to improve the processing convenience of the rotating shaft 20.

With reference to FIG. 4, FIG. 6 and FIG. 8, in one embodiment, the welding portion 31 of the fixing member 30 may be disposed on the first side 11 a of the housing base 10; thereby, when the fixing member 30 When the welding portion 31 is disposed on the first side 11a of the housing 10, laser welding can be performed more easily from the outside of the rotor 1 to provide convenience in processing. Referring to FIG. 10, in another embodiment, the welding portion 31 of the fixing member 30 may be disposed on the second side 11b of the housing 10; thereby, when the welding portion 31 of the fixing member 30 When disposed on the second side 11b of the housing base 10, the welding portion 31 can be hidden inside the rotor 1 to enhance the aesthetics of the rotor 1 of the motor of the present invention. Referring to FIG. 12, in yet another embodiment, the welding portion 31 of the fixing member 30 can be disposed on the first side 11 a and the second side 11 b of the housing base 10 at the same time; thereby, when the housing base When the welding portions 31 are provided on the first side 11a and the second side 11b of 10, respectively, the stability of the coupling between the housing base 10 and the rotating shaft 20 can be greatly improved, and the rotating shaft 20 can be effectively prevented from falling off from the housing base 10. Therefore, the position and number of the welding parts 31 of the rotor 1 of the motor of the present invention can be determined according to actual assembly requirements, and are not limited.

With reference to FIGS. 5 to 8, in one embodiment, the first side 11 a or the second side 11 b of the housing base 10 forms a recess 14 around the shaft connection portion 111, and the recess 14 is used to accommodate The welding part 31 of the fixing member 30. In this way, the welding portion 31 is accommodated in the concave portion 14 to prevent the welding portion 31 from protruding from the first side 11 a or the second side 11 b of the housing 10 to protect and hide the welding portion 31.

In the above embodiment, the rotor 1 of the motor of the present invention mainly uses the first outer diameter D2 of the first section 21 of the rotating shaft 20 to be smaller than the aperture D1 of the through hole 111a of the housing 10 to prevent the rotating shaft 20 During the installation process, such as scratches or deformation. In addition, the fixing member 30 can use laser welding to form the welding portion 31 to effectively improve the stability of the coupling between the rotating shaft 20 and the housing 10. Moreover, the first end 20a of the rotor 1 of the motor of the present invention can protrude from the first side 11a of the base portion 11 to be used for separately combining components such as a fan wheel. Overall, the assembly convenience of the rotor 1 can be improved, the rotation stability of the rotor 1 can be improved, the combination stability of the housing 10 and the rotating shaft 20 can be improved, and the processing convenience of the fixing member 30 can be improved, and Many functions such as improving the usage range of the transferer.

The above-mentioned embodiments are only to illustrate the principle and efficacy of the present invention, but not to limit the present invention. The modifications and changes made by those skilled in the art to the above embodiments still do not violate the spirit of the present invention. The scope of the rights of the present invention shall be as listed in the patent application scope described later.

1‧‧‧Rotor 10‧‧‧Shell seat 11‧‧‧Base 11a‧‧‧First side 11b‧‧‧Second side 111‧‧‧Shaft joint 111a‧‧‧Perforation 12‧‧‧Extension 121‧ ‧‧Inner side wall 13‧‧‧Sleeve part 14‧‧‧Concave part 20‧‧‧Rotating shaft 20a‧‧‧First end 20b‧‧‧Second end 21‧‧‧First section 22‧‧‧Second area Segment 23‧‧‧Shoulder 30‧‧‧Fixed piece 31‧‧‧Welding part 40‧‧‧Permanent magnet D1‧‧‧Aperture D2‧‧‧First outer diameter D3‧‧‧Second outer diameter X‧‧ ‧The first convex elongation Y‧‧‧The second convex elongation

FIG. 1 shows an exploded perspective view of a rotor of a motor in one direction according to an embodiment of the present invention;

FIG. 2 shows an exploded perspective view of the rotor of the motor according to an embodiment of the present invention in the direction of the other side;

3 shows a combined cross-sectional view of the rotor of the motor according to the first embodiment of the present invention;

4 shows an enlarged cross-sectional view of the rotor of the motor according to the first embodiment of the present invention according to FIG. 3 A1;

5 shows a combined cross-sectional view of a rotor of a motor according to a second embodiment of the invention;

6 shows an enlarged cross-sectional view of the rotor of the motor according to the second embodiment of the present invention according to A2 of FIG. 5;

7 shows a combined cross-sectional view of a rotor of a motor according to a third embodiment of the invention;

8 shows an enlarged cross-sectional view of the rotor of the motor according to the third embodiment of the present invention according to A3 of FIG. 7;

9 shows a combined cross-sectional view of a rotor of a motor according to a fourth embodiment of the invention;

10 shows an enlarged cross-sectional view of the rotor of the motor according to the fourth embodiment of the present invention according to A4 of FIG. 9;

11 shows a combined cross-sectional view of a rotor of a motor according to a fifth embodiment of the present invention; and

FIG. 12 shows an enlarged cross-sectional view of the rotor of the motor according to the fifth embodiment of the present invention according to A5 of FIG. 11.

1‧‧‧Rotor

10‧‧‧Shell

11‧‧‧Base

11a‧‧‧First side

11b‧‧‧Second side

111‧‧‧Shaft joint

111a‧‧‧Perforation

12‧‧‧Extension

121‧‧‧Inner side wall

13‧‧‧Casing Department

20‧‧‧spindle

20a‧‧‧The first end

20b‧‧‧second end

21‧‧‧The first section

22‧‧‧Second Section

23‧‧‧ shoulder

30‧‧‧Fixed pieces

31‧‧‧Welding Department

40‧‧‧Permanent magnet

D1‧‧‧Aperture

D2‧‧‧The first outer diameter

D3‧‧‧Second outer diameter

X‧‧‧The first convex elongation

Y‧‧‧Second convex elongation

Claims (16)

A rotor of a motor includes: a housing with a base portion having a first side and a second side opposite to each other, the base portion is provided with a shaft joint portion, the shaft joint portion includes a through hole, the through hole penetrates the The first side and the second side, and the perforation of the shaft connecting portion has an aperture; a rotating shaft has a first end and a second end opposite, the rotating shaft has at least a first section, the first The section has a first outer diameter, the first outer diameter is smaller than the aperture of the perforation, the rotating shaft extends through the perforation of the housing base with the first section, and the first end protrudes from the base On the first side, the second end protrudes from the second side of the base; a fixed part having at least one welding part formed by laser welding, the welding part is disposed on the shaft connection part of the housing The part corresponding to the rotating shaft is used to fix the housing and the rotating shaft to each other; and a permanent magnet is combined with the housing and the permanent magnet is located on the second side of the base. According to the rotor of the motor of claim 1, wherein the aperture of the perforation of the housing and the first outer diameter of the first section of the rotating shaft have a diameter difference, the diameter difference is greater than 0mm, And the diameter difference is less than or equal to 0.1mm. The rotor of the motor according to claim 2, wherein the diameter difference is less than or equal to 0.02mm. The rotor of the motor according to claim 1, wherein in the axial direction of the rotating shaft, there is a first convex elongation between the first end of the rotating shaft and the shaft connecting portion, and the second end of the rotating shaft is connected to the shaft There is a second convex elongation between the parts, and the length of the first convex elongation is greater than or equal to half of the second convex elongation. The rotor of the motor according to claim 4, wherein the first convex elongation of the rotating shaft is less than or equal to eight times the second convex elongation. The rotor of the motor according to claim 1, wherein the first section of the rotating shaft is adjacent to the second end, and there is a second section between the first end of the rotating shaft and the first section, the second The section has a second outer diameter, the second outer diameter is greater than the aperture of the perforation, the junction of the second section and the first section forms a shoulder, the shoulder abuts the base of the base First side. The rotor of the motor according to claim 1, wherein the first section of the rotating shaft is adjacent to the first end, and there is a second section between the second end of the rotating shaft and the first section, the second The section has a second outer diameter that is greater than the aperture of the perforation, the junction of the second section and the first section forms a shoulder, and the shoulder abuts the base of the base The second side. The rotor of the motor according to claim 1, wherein the first section to the second end of the rotating shaft are the first section. The rotor of the motor according to claim 1, wherein the housing seat is provided with a set of tube parts, and the sleeve part surrounds the perforation forming the shaft connection part. The rotor of the motor according to claim 9, wherein the sleeve portion is provided on the first side of the housing base and extends toward the first end of the rotating shaft. The rotor of the motor according to claim 9, wherein the sleeve portion is provided on the second side of the housing base and extends toward the second end of the rotating shaft. The rotor of the motor according to claim 1, wherein the welding portion of the fixing member is provided on the first side of the housing. The rotor of the motor according to claim 1, wherein the welding portion of the fixing member is provided on the second side of the housing. The rotor of the motor according to claim 1, wherein the welding part of the fixing member is provided on the first side and the second side of the housing. The rotor of the motor according to claim 1, wherein the first side or the second side of the housing base forms a recess at the periphery of the shaft joint, the recess is used to accommodate the welding part of the fixing member. The rotor of the motor according to claim 1, wherein the housing further has an extension portion, the extension portion is integrally joined to the second side of the base portion, the extension portion has an inner side wall, and the permanent magnet is joined to the inner side wall.

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