TWI412214B - Motor base - Google Patents

Abstract

A motor base comprises a bottom plate, an axial seat and a shaft tube. The bottom has opposing first and second surfaces. The first surface is spaced from the second surface by an axial length. The axial seat is mounted on the second surface of the bottom plate and has opposing first and second ends, with the first end facing the bottom plate and the second end being away from the bottom plate. The second end is spaced from the first surface of the bottom plate by a height. The ratio of the height to the axial length is between 1.5 and 5. The shaft tube is coupled to the axial seat. Based on this, the shaft is prevented from shifting and advantages such as better shaft-fixing effect and enhanced structural intensity.

Description

Motor base

The present invention relates to a motor base, and more particularly to a motor base that can be combined with a coil assembly and a rotor to form a motor structure.

Referring to FIG. 1 , the conventional motor 9 generally includes a motor base 91 , a rotor 92 , and a coil assembly 93 . The motor base 91 has a bottom plate 911. One surface of the bottom plate 911 defines a shaft seat 912. The shaft base 912 can be coupled to a shaft tube 913. The rotor 92 rotatably couples the shaft tube 913. The coil assembly 93 is coupled to the motor. The base 91 is configured to drive the rotor 92 to rotate.

The shaft base 912 of the motor base 91 is mainly used to support the shaft tube 913, and the shaft tube 913 must be used to support components such as the rotor 92; therefore, whether the shaft seat 912 can actually support the shaft tube 913, It is an important factor affecting the quality of the product of the motor 9. More specifically, in the axial direction of the shaft tube 913, the bottom plate 911 has an axial thickness (T), and the shaft seat 912 has an axial height (H); wherein the axial thickness (T) and the The proportional structural relationship between the axial heights (H) will determine whether the axle seat 912 can indeed support the axle tube 913. For example, as shown in Fig. 2, the axial height of the axle seat 912 is assumed ( H) is lower, the joint area between the shaft seat 912 and the shaft tube 913 is also relatively reduced; therefore, the shaft seat 912 cannot effectively support the shaft tube 913, resulting in the shaft tube 913 being easily deflected. And the combination of poor stability and other issues.

As shown in FIG. 3, assuming that the axial height (H) of the axle seat 912 is relatively high, although the joint area between the axle seat 912 and the axle tube 913 is relatively increased, the axle seat 912 can be made effective. The shaft tube 913 is supported. However, at this time, assuming that the axial thickness (T) of the bottom plate 911 is not relatively increased, the bottom plate 911 is not stably supported by the bottom plate 912, resulting in the bottom plate 911 and the shaft. The junction of the seat 912 is prone to cracks, which in turn affects the structural strength of the motor base 91. Further, if the axial height (H) is set too high, the overall axial height of the motor base 91 is relatively increased. It is not easy to develop designs in the direction of miniaturization.

In summary, the axial relationship between the axial thickness (T) of the bottom plate 911 and the axial height (H) of the shaft seat 912 is such that the shaft tube 913 is skewed and the coupling stability is achieved. Poor or affecting the structural strength of the motor base 91 conforms to important factors such as standards, and therefore it is necessary to improve the conventional motor base 91.

It is an object of the present invention to provide a motor base that ensures that the shaft tube is less prone to deflection.

Another object of the present invention is to provide a shaft tube that can be stably coupled to a motor base.

It is still another object of the present invention to provide a motor base that can increase the structural strength.

In order to achieve the foregoing object, the technical content of the present invention is as follows: A motor base includes a bottom plate, a shaft seat and a shaft tube. The bottom plate has a first surface and a second surface, the first surface to the second surface have an axial thickness; the shaft seat is disposed on the second surface of the bottom plate, and the shaft seat has a first one And a second end, the first end faces the bottom plate, the second end is away from the bottom plate, and the end surface of the second end has an axial height to the first surface of the bottom plate, the axial height and the axial direction The thickness ratio is 1.5 to 5; the shaft tube is coupled to the shaft seat.

The above and other objects, features and advantages of the present invention will become more <RTIgt; <RTIgt; </ RTI> <RTIgt; </ RTI> <RTIgt; The motor base of the present invention comprises a bottom plate 1, a shaft seat 2 and a shaft tube 3. The shaft seat 2 is disposed on one side surface of the bottom plate 1; the shaft tube 3 is coupled to the shaft seat 2.

The bottom plate 1 has a first surface 11 and a second surface 12; wherein the first surface 11 to the second surface 12 of the bottom plate 1 have an axial thickness (T), and the axial thickness (T) is preferably It is 0.3 to 1.5 mm.

The axle seat 2 is disposed on the second surface 12 of the bottom plate 1. The axle seat 2 can be coupled to the bottom plate 1 by assembly, or preferably, the base plate 1 is integrally formed by integral molding. Moreover, the axle base 2 has a first end 21 and a second end 22 opposite to the bottom plate 1 , the second end 22 is away from the bottom plate 1 , wherein the end face of the second end 22 is The first surface 11 of the bottom plate 1 has an axial height (H), and the ratio (H/T) of the axial height (H) to the axial thickness (T) is 1.5 to 5.

The shaft tube 3 is coupled to the shaft seat 2, and the shaft tube 3 has a shaft outer diameter (D) and a shaft tube length (L), wherein the shaft tube outer diameter (D) is preferably 3 to 10 mm. The length of the shaft tube (L) is 3 to 18 mm.

In addition, the portion of the bottom plate 1 and the shaft base 2 of the present invention that is assembled or combined with each other can form an opening 13 as shown in the drawing, so that the shaft tube 3 is coupled into the opening 13; or, according to actual use requirements The portion of the bottom plate 1 and the shaft base 2 that are assembled or joined with each other may also be a blind hole design. When the shaft tube 3 is coupled to the shaft base 2, one end of the shaft tube 3 can abut against the second surface 12.

In the actual use of the motor base of the present invention, the shaft base 2 is suitable for coupling the shaft tube 3 having an outer diameter (D) of the shaft tube of 3 to 10 mm and a shaft length (L) of 3 to 18 mm; The main technical feature of the base plate 1 having an axial thickness (T) of 0.5 mm and the ratio of the axial height (H) to the axial thickness (T) of the present invention is 1.5 to 5, and the shaft of the shaft seat 2 is selected. The height (H) is preferably set to 0.75 to 2.5 mm; thereby, the axial height (H) and the axial thickness (T) are preferably proportional to each other, that is, the shaft tube 3 is secured. After the shaft seat 2 is coupled with each other, the joint stability between the shaft tube 3 and the shaft base 2 can be improved, and the shaft tube 3 can be prevented from being skewed. Further, the bottom plate can be effectively prevented. A crack is formed at the intersection with the shaft seat 2 to ensure a better structural strength of the motor shaft seat of the present invention.

Referring to FIG. 6, the motor base of the present invention is further provided with a coil assembly 4 and a rotor 5, the coil assembly 4 being coupled to the outer peripheral wall of the shaft tube 3, the rotor 5 rotatably coupling the shaft tube 3 An air gap is formed between the coil assembly 4 and the rotor 5; thereby, a motor structure is constructed, and the coil assembly 4 can be used to drive the rotor 5 to rotate.

The motor base of the present invention can be applied to various types of heat dissipating fans. For example, as shown in Fig. 7, an axial flow type cooling fan is disclosed. As shown in Fig. 8, an air blowing type cooling fan is disclosed. More specifically, the bottom plate 1 is preferably combined with a frame 6 that surrounds the bottom plate 1. The fan frame 6 has an air inlet 61 and an air outlet 62. The rotor 5 is further formed into several The blade 51 is configured to form a heat dissipating fan. When the rotor 5 is rotated, each of the blades 51 can introduce airflow into the fan frame 6 through the air inlet 61, and then exit to the predetermined position via the air outlet 62 to Provide a cooling effect.

It is known that the motor base of the present invention can be applied to a motor structure or a cooling fan, and has the advantages of ensuring that the shaft tube 3 is less likely to be deflected, the stability of the shaft tube 3 is improved, and the structural strength of the motor base is improved. efficacy.

While the invention has been described in connection with the preferred embodiments described above, it is not intended to limit the scope of the invention. The technical scope of the invention is protected, and therefore the scope of the invention is defined by the scope of the appended claims.

[this invention]

1. . . Bottom plate

11. . . First surface

12. . . Second surface

13. . . Opening

2. . . Shaft seat

twenty one. . . First end

twenty two. . . Second end

3. . . Shaft tube

4. . . Coil set

5. . . Rotor

51. . . blade

6. . . Fan frame

61. . . Air inlet

62. . . Air outlet

[知知]

9. . . motor

91. . . Motor base

911. . . Bottom plate

912. . . Shaft seat

913. . . Shaft tube

92. . . Rotor

93. . . Coil set

Figure 1: A cross-sectional view of a conventional motor.

Figure 2: Schematic diagram of the structure of the motor base of the conventional motor (1).

Figure 3: Schematic diagram of the structure of the motor base of the conventional motor (2).

Figure 4 is an exploded perspective view of the motor base of the present invention.

Fig. 5 is a sectional view showing the combination of the motor base of the present invention.

Figure 6 is a cross-sectional view showing the assembly of the motor base of the present invention applied to the motor structure.

Fig. 7 is a sectional view showing the combination of the motor base of the present invention applied to an axial flow type cooling fan.

Fig. 8 is a sectional view showing the combination of the motor base of the present invention applied to an air blowing type cooling fan.

1. . . Bottom plate

11. . . First surface

12. . . Second surface

13. . . Opening

2. . . Shaft seat

twenty one. . . First end

twenty two. . . Second end

3. . . Shaft tube

Claims (7)

A motor base includes: a bottom plate having a first surface and a second surface, the first surface to the second surface having an axial thickness; a shaft seat disposed on the second surface of the bottom plate The shaft seat has a first end facing the bottom plate, the second end is away from the bottom plate, and an end surface of the second end has an axial height to the first surface of the bottom plate The ratio of the axial height to the axial thickness is 1.5 to 5; and a shaft tube is coupled to the shaft seat. The motor base according to the first aspect of the patent application, wherein the outer diameter of the shaft tube is 3 to 10 mm, and the length of the shaft tube is 3 to 18 mm. The motor base according to claim 1 or 2, wherein the bottom plate has an axial thickness of 0.3 to 1.5 mm. The motor base according to claim 1 or 2, wherein a coil set and a rotor are further disposed, the coil set is coupled to the shaft tube, and the rotor rotatably couples the shaft tube, the coil set and the rotor There is an air gap between them. The motor base according to claim 3, wherein a coil set and a rotor are further disposed, the coil set is coupled to the shaft tube, and the rotor is rotatably coupled to the shaft tube, and the coil group and the rotor have An air gap. The motor base according to claim 4, wherein the bottom plate is combined with a frame, the frame surrounds the bottom plate, and the frame has an air inlet and an air outlet, and the rotor further forms a plurality of blades. The motor base according to claim 5, wherein the bottom plate is combined with a frame, the frame surrounds the bottom plate, and the frame has an air inlet and an air outlet, and the rotor further forms a plurality of blades.