TWI680627B - Rotor of motor - Google Patents

Abstract

The invention relates to a rotor of a motor. The rotor of the motor includes: a shell seat, a rotating shaft, a fixed member and a permanent magnet. The shell seat has a base portion provided with a shaft connection portion, the shaft connection portion includes a perforation, and the perforation has an aperture. The 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 perforation, and is used to prevent the shaft from generating scratches or deformation during installation. situation. In addition, the fixing member has at least one welding portion formed by laser welding, and the welding portion is provided at a corresponding portion of the shaft connection portion of the housing base and the rotating shaft to ensure that the housing base and the rotating shaft are mutually Stable combination. In addition, one end of the rotating shaft can protrude from the base to be used for combining components such as a fan wheel.

Description

Rotor of motor

The invention relates to a rotor, in particular to 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 a center position of the hub, and the permanent magnet is coupled to an inner side of the hub. Thereby, the rotor of the motor can be rotatably combined with the stator by using the rotating shaft to form a motor structure. There is an air gap between the stator and the permanent magnet. After the stator is energized, an intersection can be created between the stator and the permanent magnet. A variable magnetic field is used to drive the rotor of the motor to rotate.

However, the rotating shaft of the rotor of the conventional motor is mainly forced into one of the connecting holes of the hub in a tight fit manner. During the process of forcing the rotating shaft into and passing through the connecting hole, it is easy to cause damage to the outer peripheral surface of the rotating shaft, such as Many problems, such as scratches and deformations, cause the rotation stability of the rotor to decrease, and also easily affect the appearance integrity and aesthetics of the shaft.

The invention relates to a rotor of a motor. The rotor of the motor includes: a shell seat, a rotating shaft, a fixed member and a permanent magnet. The shell seat has a base portion having a first side and a second side opposite to each other. The base portion is provided with a shaft connection portion, and the shaft connection portion includes a perforation that penetrates the first side and the second side. , And the perforation of the shaft connection portion has an aperture. The shaft has a first end and a second end opposite to each other. The 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 rotating shaft extends through the perforation of the shell seat 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 portion formed by laser welding, and the welding portion is provided at a corresponding portion of the shaft connection portion and the rotating shaft of the housing base to fix the housing base and the rotating shaft to each other. The permanent magnet is combined with the shell seat, and the permanent magnet is located on the second side of the base.

Therefore, by using the first outer diameter of the first section of the shaft to be smaller than the hole diameter of the perforation of the housing seat, it is possible to prevent the shaft from generating conditions such as scratches or deformation during installation. In addition, the welding part can be formed by laser welding means to effectively improve the bonding stability between the rotating shaft and the housing. In addition, the first end of the rotating shaft may protrude from the first side of the base portion to be used for combining a member such as a fan wheel. Thereby, it is possible to improve the convenience of assembling the rotor, improve the rotation stability of the rotor, improve the combination and stability of the housing and the rotating shaft, improve the processing convenience of the fixing member, and increase the breadth of the rotor. And other effects.

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

The housing base 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 connection portion 111. The shaft connection portion 111 includes a perforation 111a. The perforation 111a. The first side 11 a and the second side 11 b pass through, and the through hole 111 a of the shaft connection portion 111 has an aperture D1. In addition, the case base 10 may have an extension portion 12 integrally coupled to the second side 11 b of the base portion 11, and the extension portion 12 has an inner side wall 121 so that the case base 10 may form 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 the portion A1 of FIG. 3. With reference to FIGS. 3 and 4, in an 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, the first outer diameter D2 is smaller than the aperture D1 of the perforation 111a, and the rotating shaft 20 extends through the perforation 111a of the housing base 10 with the first section 21, and the first end 20a The first side 11 a of the base portion 11 protrudes, and the second end 20 b protrudes of the second side 11 b of the base portion 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 and the rotating shaft 20 of the housing base 10 to be used for the housing base 10. And the rotating shafts 20 are fixed to each other. The corresponding parts of the shaft connecting portion 111 and the rotating shaft 20 refer to various space positions suitable for laser welding operations between the outer periphery of the rotating shaft 20 and the shaft connecting portion 111; and the welding portion 31 is formed by It is a principle that the housing base 10 and the rotating shaft 20 can be fixed surely. The rotor 1 of the motor of the present invention does not limit the number and positions of the welding portions 31.

The permanent magnet 40 is coupled to the housing base 10, and the permanent magnet 40 may be located on the second side 11 b of the base portion 11. When the housing base 10 has the extension portion 12 to form a hub shape, the permanent magnet 40 can be combined with the inner side wall 121 of the extension portion 12 to ensure a better bonding and stability between the housing 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 into a ring-shaped body by a plurality of magnets; or, the permanent magnet 40 may be rolled into a ring-shaped body by a magnet piece, but not the 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 perforation 111a of the housing base 10, so that the rotating shaft 20 does not need to be forced in by a tight fit. The perforation 111a of the housing base 10 can effectively prevent the shaft 20 from generating scratches or deformations. 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 shaft 20. In addition, the rotating shaft 20 and the housing base 10 can be fixed to each other by the fixing member 30. The fixing member 30 is formed by the welding means 31 by laser welding. Therefore, the rotating shaft 20 and the The bonding stability between the shell bases 10 is relatively simple, and the processing method of the welding portion 31 is relatively simple and the fixing effect is also good. In addition, the first end 20a of the rotor 1 of the motor of the present invention may further protrude from the first side 11a of the base portion 11. Therefore, when the rotor 1 is applied to the motor structure, the outer side of the motor structure may be separately combined such as The fan wheel and other components provide better heat dissipation or ventilation functions, and make the rotor 1 more versatile.

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

With reference to FIG. 4, in an embodiment, there is a diameter difference between the aperture D1 of the perforation 111 a of the housing base 10 and the first outer diameter D2 of the first section 21 of the shaft 20 (that is, The aperture D1 minus the first outer diameter D2), the diameter difference may be greater than 0mm, and the diameter difference may be less than or equal to 0.1mm, wherein the diameter difference may be further set to be less than or equal to 0.02mm; Therefore, in addition to avoiding the occurrence of scratches or deformations in the process of the shaft 20 penetrating the perforation 111a of the housing base 10, it is also possible to ensure that the gap between the shaft 20 and the perforation 111a is not too large to maintain An appropriate gap makes the rotating shaft 20 easily fit the fixing member 30 and the shell base 10 to each other.

With reference to FIG. 3, in an embodiment, in the axial direction of the rotating shaft 20, a first convex elongation X is provided between the first end 20 a of the rotating shaft 20 and the shaft connection portion 111. There is a second convex elongation Y between the second end 20b and the shaft connection portion 111, and the first convex elongation X may be greater than or equal to one-half of the second convex elongation Y; thereby, using the The first convex elongation X of the rotating shaft 20 has a set length. Except that the second convex elongation Y of the rotating shaft 20 can be combined with a certain member to form a motor structure, the section of the first convex elongation X will be It is easier to install various components such as fan wheels to improve the convenience of installation, and to 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 may 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 better range value can be defined between the first convex elongation X and the second convex elongation Y to 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 sectional view of a rotor of a motor according to a second embodiment of the present invention. FIG. 6 shows an enlarged cross-sectional view of a rotor of a motor according to a second embodiment of the present invention according to part A2 of FIG. 5. FIG. 7 shows a combined sectional view of a rotor of a motor according to a third embodiment of the present invention. FIG. 8 shows an enlarged cross-sectional view of a rotor of a motor according to a third embodiment of the present invention according to part A3 of FIG. 7. With reference to FIG. 3 and FIG. 4, in an embodiment, the casing base 10 is provided with a set of pipe portions 13, and the sleeve portion 13 surrounds the through hole 111 a forming the shaft connection portion 111; wherein the sleeve portion 13 may be provided The first side 11 a of the housing base 10 extends toward the first end 20 a of the rotating shaft 20. 5 and FIG. 6, 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. Thereby, the sleeve portion 13 can be used to surround the rotating shaft 20 so as to improve the bonding stability between the housing base 10 and the rotating shaft 20, and the position of the sleeve portion 13 is not limited, and can be installed according to the actual situation Demand decision. In addition, the rotor 1 of the motor of the present invention can also choose to omit the sleeve portion 13 according to requirements. With reference to FIG. 7 and FIG. 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 shaft 20 is adjacent to the second end 20 b, and the first end 20 a of the shaft 20 is between the first section 21 and the first section 21. A second section 22 is provided. The second section 22 has a second outer diameter D3. The second outer diameter D3 is larger than the aperture D1 of the perforation 111a. The second section 22 and the first section 21 A shoulder portion 23 is formed at the intersection portion, and the shoulder portion 23 abuts on the first side 11 a of the base portion 11. Thereby, when the rotating shaft 20 is assembled, the second end 20b of the rotating shaft 20 can be penetrated from one side of the first side 11a of the housing base 10 through the perforation 111a, 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 23 is used to abut the first side 11a of the base 11 to ensure that the rotating shaft 20 and the housing base 10 can be preliminary It is positioned so as to form the fixing member 30 by laser welding in the following, so as to surely fix and fix the rotating shaft 20 and the shell base 10 to each other, and improve the bonding stability between the two.

FIG. 9 shows a sectional view of a rotor of a motor according to a fourth embodiment of the present invention. FIG. 10 is an enlarged cross-sectional view of a rotor of a motor according to a fourth embodiment of the present invention according to part A4 of FIG. 9. With reference to FIGS. 9 and 10, in an embodiment, the first section 21 of the shaft 20 is adjacent to the first end 20 a, and the second end 20 b of the shaft 20 is between the first section 21 and the first section 21. A second section 22 is provided. The second section 22 has a second outer diameter D3. The second outer diameter D3 is larger than the aperture D1 of the perforation 111a. The second section 22 and the first section 21 A shoulder portion 23 is formed at the intersection portion, and the shoulder portion 23 abuts on the second side 11 b of the base portion 11. Thereby, when the rotating shaft 20 is assembled, the first end 20a of the rotating shaft 20 can be penetrated from one side of the second side 11b of the housing base 10 through the perforation 111a, 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 base 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 base 10 can be preliminary Positioning so as to form the fixing member 30 by laser welding in the following, so as to surely fix and fix the rotating shaft 20 and the shell base 10 to each other, and also can improve the bonding stability between the two.

FIG. 11 shows a combined sectional view of a rotor of a motor according to a fifth embodiment of the present invention. FIG. 12 shows an enlarged cross-sectional view of a rotor of a motor according to a fifth embodiment of the present invention according to part A5 of FIG. 11. With reference to FIGS. 11 and 12, in an embodiment, the first section 21 is provided between the first end 20 a to the second end 20 b of the shaft 20. Therefore, when the shaft 20 is assembled, the first end 20a of the shaft 20 can be selected to pass through the perforation 111a, or the second end 20b of the shaft 20 can be selected to be passed through the perforation 111a. To improve installation convenience. In addition, the outer peripheral surface of the rotating shaft 20 can be directly processed at one time to form the first section 21 to improve the processing convenience of the rotating shaft 20.

With reference to FIG. 4, FIG. 6, and FIG. 8, in an 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 11 a of the housing base 10, it is easier to perform laser welding operation from the outside of the rotor 1 to provide processing convenience. With reference to FIG. 10, in another embodiment, the welding portion 31 of the fixing member 30 may be disposed on the second side 11 b of the housing base 10; thereby, when the welding portion 31 of the fixing member 30 When disposed on the second side 11 b of the housing base 10, the welding portion 31 can be hidden inside the rotor 1 to improve the aesthetics of the rotor 1 of the motor of the present invention. With reference to FIG. 12, in yet another embodiment, the welding portion 31 of the fixing member 30 may be simultaneously disposed on the first side 11 a and the second side 11 b of the housing base 10; thereby, when the housing base When the welding portion 31 is respectively provided on the first side 11a and the second side 11b of 10, the joint stability of 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 portions 31 of the rotor 1 of the motor of the present invention may be determined according to actual assembly requirements, and are not limited.

With reference to FIG. 5 to FIG. 8, in an embodiment, the first side 11 a or the second side 11 b of the housing base 10 is connected to the periphery of the shaft connection portion 111 to form a recessed portion 14. The welding portion 31 of the fixing member 30. Therefore, by using the welding portion 31 to be received in the concave portion 14, the welding portion 31 can be prevented from protruding from the first side 11 a or the second side 11 b of the housing base 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 shaft 20 to be smaller than the hole D1 of the perforation 111a of the housing base 10 to prevent the shaft 20 During the installation process, such as scratches or deformation. In addition, the fixing member 30 can form the welding portion 31 by a laser welding method, so as to effectively improve the bonding stability between the rotating shaft 20 and the housing base 10. In addition, the first end 20a of the rotor 1 of the motor of the present invention may protrude from the first side 11a of the base portion 11 to be used for separately combining components such as a fan wheel. On the whole, it is possible to improve the assembly convenience of the rotor 1, improve the rotation stability of the rotor 1, improve the combination and stability of the housing 10 and the rotating shaft 20, and improve the processing convenience of the fixing member 30, and Enhance the breadth of this turn and many other effects.

The above embodiments are only for explaining the principle of the present invention and its effects, but not for limiting the present invention. 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 rights of the present invention should be listed in the scope of patent application described later.

1‧‧‧ rotor

10‧‧‧shell

11‧‧‧ base

11a‧‧‧first side

11b‧‧‧Second side

111‧‧‧shaft joint

111a‧‧‧perforation

12‧‧‧ extension

121‧‧‧ inside wall

13‧‧‧ Casing Department

14‧‧‧ recess

20‧‧‧ shaft

20a‧‧‧First end

20b‧‧‧Second end

21‧‧‧ Section 1

22‧‧‧Second Section

23‧‧‧Shoulder

30‧‧‧Fixed parts

31‧‧‧ Welding Department

40‧‧‧permanent magnet

D1‧‧‧ Aperture

D2‧‧‧first outer diameter

D3‧‧‧Second outer diameter

X‧‧‧The first convex elongation

Y‧‧‧Second convex elongation

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

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

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

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

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

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

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

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

Fig. 9 shows a combined sectional view of a rotor of a motor according to a fourth embodiment of the present invention;

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

FIG. 11 shows a combined 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 a rotor of a motor according to a fifth embodiment of the present invention according to part A5 of FIG. 11.

Claims (15)

A rotor of a motor includes: a shell seat having a base portion, the base portion having a first side and a second side opposite to each other, the base portion being provided with a shaft connection portion, the shaft connection portion including a perforation, the perforation penetrating the A first side and the second side, and the perforation of the shaft connection portion has an aperture; a rotating shaft having a first end opposite to the first end and a second end, the rotating shaft having 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 passes through the perforation of the shell seat with the first section, and the first end protrudes from the base. A first side, the second end protruding from the second side of the base; a fixing member having at least one welding portion formed by laser welding, the welding portion being provided on the shaft connection portion of the housing seat The corresponding part corresponding to the rotating shaft is used for fixing the housing base and the rotating shaft to each other; and a permanent magnet combined with the housing base, and the permanent magnet is located on the second side of the base; wherein the perforated of the housing base There is a diameter difference between the aperture and the first outer diameter of the first section of the shaft, the diameter Based difference is greater than 0mm, and the diameter difference is less than or equal to 0.1mm. The rotor of the motor as claimed in claim 1, wherein the radial difference is less than or equal to 0.02 mm. A rotor of a motor includes: a shell seat having a base portion, the base portion having a first side and a second side opposite to each other, the base portion being provided with a shaft connection portion, the shaft connection portion including a perforation, the perforation penetrating the A first side and the second side, and the perforation of the shaft connection portion has an aperture; a rotating shaft having a first end opposite to the first end and a second end, the rotating shaft having 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 passes through the perforation of the shell seat with the first section, and the first end protrudes from the base. A first side, the second end protruding from the second side of the base; a fixing member having at least one welding portion formed by laser welding, the welding portion being provided on the shaft connection portion of the housing seat The corresponding part corresponding to the rotating shaft is used to fix the housing base and the rotating shaft to each other; and a permanent magnet combined with the housing base, and the permanent magnet is located on the second side of the base; 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. Between a second end of the shaft and having a second contact portion protruding length, the first length of elongation is greater than or equal to the second protrusion protruding length of one-half. The rotor of the motor of claim 3, wherein the first convex elongation of the rotating shaft is less than or equal to eight times the second convex elongation. A rotor of a motor includes: a shell seat having a base portion, the base portion having a first side and a second side opposite to each other, the base portion being provided with a shaft connection portion, the shaft connection portion including a perforation, the perforation penetrating the A first side and the second side, and the perforation of the shaft connection portion has an aperture; a rotating shaft having a first end opposite to the first end and a second end, the rotating shaft having 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 passes through the perforation of the shell seat with the first section, and the first end protrudes from the base. A first side, the second end protruding from the second side of the base; a fixing member having at least one welding portion formed by laser welding, the welding portion being provided on the shaft connection portion of the housing seat The corresponding part corresponding to the rotating shaft is used to fix the housing base and the rotating shaft to each other; and a permanent magnet combined with the housing base, and the permanent magnet is located on the second side of the base; wherein the first area of the rotating shaft The segment is adjacent to the second end, and there is a second area between the first end of the shaft and the first section. The second section has a second outer diameter, the second outer diameter is larger than the hole diameter of the perforation, and the interface between the second section and the first section forms a shoulder, and the shoulder abuts on The first side of the base. If the rotor of the motor of claim 1, 3 or 5, wherein the first section of the shaft is adjacent to the first end, there is a second section between the second end of the shaft and the first section. The second section has a second outer diameter, the second outer diameter is larger than the hole diameter of the perforation, and the interface between the second section and the first section forms a shoulder, and the shoulder abuts on The second side of the base. If the rotor of the motor of claim 1, 3 or 5, wherein the first end to the second end of the shaft is the first section. For example, the rotor of the motor of claim 1, 3 or 5, wherein the shell seat is provided with a set of tube portions, and the sleeve portions surround the perforations forming the shaft connection portion. The rotor of the motor as claimed in claim 8, wherein the sleeve portion is disposed on the first side of the housing base and extends toward the first end of the rotating shaft. The rotor of the motor as claimed in claim 8, wherein the sleeve portion is disposed on the second side of the housing base and extends toward the second end of the rotating shaft. The rotor of the motor as claimed in claim 1, 3 or 5, wherein the welding portion of the fixing member is disposed on the first side of the housing. The rotor of the motor as claimed in claim 1, 3 or 5, wherein the welding portion of the fixing member is disposed on the second side of the housing. The rotor of the motor as claimed in claim 1, 3 or 5, wherein the welding portion of the fixing member is disposed on the first side and the second side of the housing. If the rotor of the motor of claim 1, 3 or 5, wherein the first side or the second side of the housing seat is tied to the periphery of the shaft connecting portion to form a recess, the recess is used to receive the fixing member. Welding department. If the rotor of the motor of claim 1, 3 or 5, wherein the shell seat further has an extension, the extension is integrally coupled to the second side of the base, the extension has an inner side wall, and the permanent magnet is coupled to The inner side wall.