TW201713861A - Rotary shaft for fan motor - Google Patents

Abstract

Disclosed is a rotary shaft for a fan motor. The fan motor comprises a rotor in fixed shaft connection with the rotary shaft and a plurality of shaft sleeves pivoted on the rotary shaft. The rotary shaft comprises a rod body and a lubricating agent. The rod body is suitable for passing through the rotor and being fixed connected with the rotor and allows each shaft sleeve to be pivoted on the rotor, the rod forms an axial blind hole and a plurality of penetrating hole communicated with the blind hole, disposed positions of the penetrating holes respectively correspond to pivot positions of the shaft sleeves, and the lubricating agent fills the blind hole of the rod body. When the rod body rotates with the rotor, the lubricating agent filling the blind hole seeps out, due to a centrifugal force generated when the rod body rotate, to a space between the shaft sleeves and the rod body via the penetrating holes to provide a lubricating function, and then the efficacy that the service life of the fan motor is improved is achieved.

Description

Shaft for fan motor

The present invention relates to a rotating shaft, and more particularly to a rotating shaft for a fan motor and including a lubricant.

Referring to Fig. 1, the state of the shaft assembly of the conventional fan motor will be described. Here, it should be particularly noted that the fan motor shown in Fig. 1 only discloses the components related to the shaft assembly, and the fan motor is not depicted. The necessary components are a simplified schematic diagram. As shown in FIG. 1 , the fan motor includes a positioning assembly 15 , a rotating shaft 11 pivoted on the positioning assembly 15 , a rotor 12 fixedly coupled to the rotating shaft 11 , and two An oil-containing bushing 13 for pivoting the rotating shaft 11 respectively; wherein the positioning frame 15 is formed by a front frame 151 and a rear frame 152, and is respectively disposed on the front frame 151 and the rear frame 152. Each of the shaft seats 153, 154 is formed, and each of the shaft seats 153 or 154 is fixed to the corresponding oil-containing bushing 13 . Here, it is emphasized that the oil-impregnated bushings 13 are die-cast by powder metallurgy, and a plurality of minute pores (not shown) are formed thereon, and the oil-impregnated bushings 13 are immersed in the lubricating fluid. At this time, the lubricating fluid enters into the pores of the oil-containing bushings 13 by infiltration, so that even if the oil-containing bushings 13 are used, there is a lubricating effect of the lubricating fluid seeping out.

When the fan motor is running, the rotor 12 starts to rotate so that the rotating shaft 11 rotates with the rotor 12 relative to the oil-containing bushings 13. At this time, the lubricating oil of the oil-containing bushings 13 passes through the oily oil. The pores of the sleeve 13 seep into between the oil-containing bushings 13 and the rotating shaft 11 to provide lubrication.

However, the lubricating fluid of the oil-impregnated bushing 13 is easily volatilized or air-dried by the influence of the ambient temperature, causing the lubricating effect to disappear, resulting in an increase in the frictional resistance between the rotating shaft 11 and the oil-containing bushings 13, and if it is serious, The shaft 11 and the oil-impregnated bushings 13 are stuck to each other, and the fan motor is unsuccessful.

In order to improve the above disadvantages, the related art has developed another conventional fan motor as shown in FIG. 2. Of course, another conventional fan motor depicted in FIG. 2 is the same as that depicted in FIG. 1, and is also a simplified Schematically, referring to FIG. 2, another conventional fan motor is illustrated. The fan motor also includes a rotating shaft 11, a rotor 12, two oil-containing bushings 13, and a positioning frame 15, the relative positions and relationships of the components. The same is shown in FIG. 1 , and the fan motor is improved in that the outer surface of each oil-containing bushing 13 is covered with an oil-containing foam 14 so that the oil-containing foam 14 is covered. It is possible to provide its own lubricating fluid, which is added to the corresponding oil-containing bushing 13. In other words, the lubricating fluid contained in the oil-containing foam 14 itself penetrates into the pores of the oil-impregnated bushing 13 to be coated. In order to provide lubrication between the rotating shaft 11 and the oil-containing bushings 13, the service life of the fan motor is improved.

However, after the fan motor has been operated for a period of time, dust or small debris in the use environment may enter the fan motor due to the flow of the airflow, and the electrostatic attraction is gradually attached to the oil-containing bushings 13 Between the shaft 11 and the shaft 11, the pores of the oil-containing bushings 13 are blocked, so that the lubricating fluid of the oil-containing bushings 13 cannot smoothly flow between the oil-containing bushings 13 and the rotating shaft 11, causing the rotating shaft The frictional resistance between the oil-filled bushings 11 and the oil-impregnated bushings 13 is increased to reduce the rotational speed, and the shaft 11 and the oil-impregnated bushings 13 are stuck to each other and cannot be rotated, so that the fan motor is faulty, and the fan motor is lowered. The life of the fan motor.

Therefore, how to improve the above shortcomings has become a topic to be further explored in this case.

Accordingly, it is an object of the present invention to provide a rotating shaft that increases the service life of a fan motor.

Therefore, the present invention is applied to a rotating shaft of a fan motor, the fan motor including a rotating shaft, a rotor fixedly coupled to the rotating shaft, and a plurality of sleeves for allowing the rotating shaft to pivot, the rotating shaft comprising a rod body and a lubricant .

The rod is adapted to pass through and securely connect the rotor of the fan motor and to allow each sleeve to be pivoted thereon such that the shaft is rotatable relative to the sleeve and with the rotor, the body is formed An axial blind hole and a plurality of through holes communicating with the blind hole, wherein the positions of the holes are respectively corresponding to the pivoting positions of the sleeves such that each of the holes is covered by a corresponding sleeve Not exposed. The lubricant is filled in a blind hole of the rod.

When the rod rotates with the rotor, the lubricant filled in the blind hole may be oozing out to the sleeve and the rod through the perforations due to the centrifugal force generated when the rod rotates. To provide lubrication.

The utility model has the advantages that the lubricant is filled in the blind hole of the rod body, so that the lubricant in the blind hole is oozing through the perforations due to the centrifugal force generated when the rod body rotates. Between the sleeve and the rod to facilitate lubrication.

Referring to FIG. 3, an embodiment of the state of the shaft assembly for the fan motor of the present invention is described. Here, it is specifically noted that the fan motor shown in FIG. 3 is only for exposing components related to the shaft assembly, and The other necessary components of the fan motor are not shown, but are a simplified schematic diagram, and the related positions and relationships of the components are the same as those shown in FIG. 2, and details are not described herein again. It can be seen from FIG. 3 that the fan motor includes a rotating shaft 2, a rotor 3 fixedly coupled to the rotating shaft 2, and two sleeves 4 for allowing the rotating shaft 2 to be pivoted. The rotating shaft 2 includes a rod body 21 and a lubricant. twenty two.

The rod body 21 is adapted to pass through and fix the rotor 3 of the fan motor and to pivot each of the sleeves 4 thereon so that the rod body 21 can rotate with the rotor 3 relative to the shaft sleeves 4 . The rod body 21 is formed with an axial blind hole 211, and two radial through holes 212 communicating with the blind hole 211. The positions of the holes 212 correspond to the pivoting positions of the sleeves 4, respectively. Each of the perforations 212 is covered by a corresponding sleeve 4 without being exposed.

In addition, the rod body 21 has an open end 213 communicating with the blind hole 211. The shaft 2 further includes a sealing member 23 for sealing the open end 213 of the rod body 21.

The lubricant 22 used in the embodiment is a needle car oil. Of course, other lubricants having flowable can also be used. Therefore, the lubricant 22 of the present invention is not limited by the embodiment, and the lubricant 22 is via the lubricant 22 The open end 213 of the rod body 21 is filled in the blind hole 211 of the rod body 21, so that the lubricant 22 filled in the blind hole 211 can be used for timely replenishment and seepage to the shaft 2 and the shaft sleeves. Between 4.

In this embodiment, the aperture of each of the through holes 212 is designed to allow the lubricant 22 filled in the blind hole 211 to ooze out the rod 21 in a small amount. For example, the through hole 212 used in the embodiment is 0.5 mm, but the implementation of the present invention is not limited thereto, so that when the fan motor starts to operate, the lubricant 22 filled in the blind hole 211 can be exuded by the centrifugal force generated when rotating.

Of course, the sleeves 4 used in the embodiment can also be in an oily state to better enhance the lubrication effect between the shaft 2 and the sleeves 4.

In addition, it is noted that the open end 213 is formed with an internal thread 214, and the sealing member 23 is a screw screwed to the open end 213 for sealing the blind hole 211 to seal the lubricant 22 The role in the blind hole 211.

In the present embodiment, the rotating shaft 2 of the present invention is used for passing and fixedly connecting the rotor 3 of the fan motor shown in FIG. 3, the rotating shaft 2 is opposite to the other end of the open end 213 of the rod body 21 and a fan. 6 (as shown in the imaginary line in Figure 3) is fixed.

When the fan motor is running, the rotor 3 starts to rotate, so that the rotating shaft 2 rotates with the rotor 3 relative to the sleeves 4, thereby driving the fan 6 to operate. At this time, the lubricant 22 filled in the blind hole 211 will slowly ooze out between the rod body 21 and the sleeves 4 via the perforations 212 due to the centrifugal force generated when the rod body 21 rotates. To provide lubrication, reduce frictional resistance, and prevent the lubricant 22 in the pores of the sleeves 4 from being volatilized, air dried, or blocked by dust or tiny impurities in the pores of the sleeves 4 The lubricant 22 is under-supplied to achieve the effect of increasing the life of the fan motor.

In order to prove that the rotating shaft of the fan motor of the present invention is more effective than the conventional fan motor shown in FIG. 2, the inventors conducted the rotational speed test of the present invention and the conventional fan motor, and the result shows the maximum speed of the conventional fan motor. At a speed of 1340 rpm, the maximum speed of the rotating shaft for the fan motor of the present invention is 1400 rpm, and the fan motor of the present invention is used to increase the rotational speed by 60 rpm, so that the present invention is effective. Achieve the effect of reducing frictional resistance and increasing the rotational speed. In addition, the inventors have also tested the power consumption of the present invention and the conventional fan motor, and the results show that the conventional fan motor consumes 0.41 amps, and the fan motor using the present invention consumes 0.39 amps. The power is reduced by 0.02 amps, which in turn has the advantage of saving power.

In summary, the rotating shaft 2 of the present invention is applied to the rotating shaft 2 of the fan motor, and the lubricating oil 22 is filled in the blind hole 211 to increase the content of the lubricant 22 in the fan motor, so that when the rotating shaft 2 is rotated, the rotating shaft 2 is borrowed. The lubricant 22 oozing from the perforations 212 provides lubrication between the rod body 21 and the sleeves 4 to improve the service life of the fan motor, so that the object of the present invention can be achieved.

However, the above is only the embodiment of the present invention, and the scope of the present invention is not limited thereto, and all the equivalent equivalent changes and modifications according to the scope of the patent application and the patent specification of the present invention are still The scope of the invention is covered.

11, 2‧‧‧ shaft
12, 3‧‧‧ rotor
13‧‧‧ Oily bushings
14‧‧‧ Oily foam
15‧‧‧ Positioning frame
151‧‧‧ Front Shelf
152‧‧‧ rear frame
153‧‧‧ shaft seat
154‧‧‧ shaft seat
21‧‧‧ rod body
211·‧‧‧Blind hole
212‧‧‧Perforation
213‧‧‧Open end
214‧‧‧ internal thread
22‧‧‧Lubricant
23‧‧‧Seal
4‧‧‧ bushings
6‧‧‧Fan

BRIEF DESCRIPTION OF THE DRAWINGS Other features and advantages of the present invention will be apparent from the embodiments of the drawings, wherein: Figure 1 is a partial cross-sectional view showing the shaft of a conventional fan motor; Figure 2 is a partial cross-sectional view showing another conventional A rotating shaft of a fan motor; and FIG. 3 is a partial cross-sectional view of an embodiment of the present invention illustrating the rotating shaft of the present invention for a fan motor.

2‧‧‧ shaft

21‧‧‧ rod body

211‧‧‧Blind hole

212‧‧‧Perforation

213‧‧‧Open end

214‧‧‧ internal thread

22‧‧‧Lubricant

23‧‧‧Seal

3‧‧‧Rotor

4‧‧‧ bushings

6‧‧‧Fan

Claims (5)

A rotating shaft for a fan motor, the fan motor comprising a rotating shaft, a rotor fixedly coupled to the rotating shaft, and a plurality of sleeves for allowing the rotating shaft to pivot, the rotating shaft comprising: a rod body adapted to pass through Fixing the rotor of the fan motor and allowing each bushing to be pivoted thereon such that the shaft can rotate with the rotor and the rotor, the shaft is formed with an axial blind hole, and Perforations communicating with the blind holes, the positions of the perforations respectively corresponding to the pivoting positions of the sleeves such that each of the perforations is covered by a corresponding sleeve without being exposed; and a lubricant, Filling in the blind hole of the rod body; wherein, when the rod body rotates together with the rotor, the lubricant filled in the blind hole may be centrifugally generated by the rotation of the rod body, and Perforations are oozing between the sleeves and the shaft to provide lubrication. The rotating shaft for a fan motor according to claim 1, wherein the rod body has an open end communicating with the blind hole, and the rotating shaft further comprises a sealing member for sealing the open end of the rod body. A rotary shaft for a fan motor according to claim 2, wherein an open end of the rod body is formed with an internal thread, and the seal member is a screw that is screwed to the open end. A shaft for a fan motor according to 2 or 3, wherein each of the perforations of the rod is a radial perforation. The shaft for a fan motor according to 2 or 3, wherein the lubricant is needle car oil.