CN110017291A - The combined structure of fan and impeller and shaft - Google Patents

Abstract

The combined structure of a kind of fan and impeller and shaft, the impeller and shaft linking steady character to solve the problems, such as previous fan are bad.Fan of the invention includes: a driving source, which has a shaft, and one end of the shaft is equipped with an external thread part；One impeller, the impeller have a metal axle bed and a wheel hub, which combines the metal axle bed, which combines the shaft；An and locked assembly, the locked assembly has a fastener, the inner circumferential of the fastener is equipped with an internal thread part and an annular groove, there is the fastener anti-slip ring to be fastened in the annular groove, the internal thread part of the fastener screws togather the external thread part of the shaft, and the anti-slip ring of the fastener combines the external thread part of the shaft.

Description

Combination structure of fan and fan wheel and shaft

technical field

The invention relates to a combination structure of a fan, a fan wheel and a rotating shaft, in particular to a fan and a combination structure of the fan wheel and the rotating shaft that can stably couple the fan wheel to the rotating shaft.

Background technique

The existing fan has a driving source and a fan wheel. When assembling, a plastic hub center of the fan wheel is sleeved into a rotating shaft of the driving source to be positioned, and then a nut is screwed to the rotating shaft and pressed against the rotating shaft. Plastic hub to prevent the fan wheel from disengaging from the shaft during rotation. Several embodiments similar to the existing fans have been disclosed in Chinese Taiwan Publication Nos. I565879 and M500396 and other patents.

However, in the existing fan, the plastic hub is directly combined with the metal shaft. Due to the great difference in strength between the two materials, the plastic hub is often damaged or damaged when it contacts the shaft, which not only affects the use of the fan It is also easy to cause noise when the fan wheel is running. In addition, the existing fan is only screwed to the rotating shaft by a nut, the combination of the fan wheel and the rotating shaft is not stable enough, and the drive source drives the fan wheel to rotate, inevitably some vibration will be generated, which will last for a long time. , it often occurs that the nut is gradually loosened and cannot be tightly pressed against the plastic hub, resulting in operating noise, and the user needs to re-lock the nut frequently.

In view of this, the existing fans still need to be improved.

SUMMARY OF THE INVENTION

In order to solve the above problems, the purpose of the present invention is to provide a fan, which can avoid the situation that the fan wheel is damaged by the rotating shaft.

Another object of the present invention is to provide a fan, which can ensure a stable combination of the fan wheel and the rotating shaft by means of a locking assembly that can prevent loosening.

The fan of the present invention includes: a drive source, the drive source has a rotating shaft, and one end of the rotating shaft is provided with an external thread part; a fan wheel, the fan wheel has a metal shaft seat and a hub, the hub is combined with the metal A shaft seat, the metal shaft seat is combined with the rotating shaft; and a locking component, the locking component has a fastener, the inner circumference of the fastener is provided with an internal thread portion and a ring groove, the fastener has An anti-skid ring is fastened to the ring groove, the internal thread part of the fastener is screwed with the external thread part of the rotating shaft, and the anti-skid ring of the fastener is combined with the external thread part of the rotating shaft.

Accordingly, the fan of the present invention can use the metal shaft seat to improve the combination stability of the fan wheel and the rotating shaft, and effectively prevent the structure of the fan wheel from being damaged by the rotating shaft, so that the fan can be used more durable; at the same time, the present invention The fan can also use the locking components that can prevent loosening to ensure that the fan wheel and the rotating shaft are firmly combined, which not only prevents the fan from generating operating noise during operation, but also makes it unnecessary for the user to frequently check whether the fan wheel and the rotating shaft are still stable. Combined, it can improve the convenience of use.

Wherein, the locking assembly also has a washer and a spring washer, the washer is sleeved on the rotating shaft and abuts against the metal shaft seat, the spring washer is sleeved on the rotating shaft, and the fastener is pressed against the spring washer sheet to tightly against the gasket. In this way, it has the effect of making the whole locking assembly more difficult to loosen.

Wherein, one end of the fastener facing the spring washer is provided with a skirt, and the end face of the skirt facing the spring washer is provided with a plurality of protruding teeth. In this way, the spring washer can be clamped to the plurality of protruding teeth, which has the effect of enhancing the stability of the fastener for fixing the spring washer.

Wherein, the outer diameter of the part of the fastener and the washer used to press against the spring washer is larger than the outer diameter of the spring washer. In this way, it can be ensured that the spring washer can be firmly clamped by the fastener and the washer completely.

Wherein, the outer diameter of the washer is larger than the outer diameter of the spring washer and the fastener. In this way, the contact area between the gasket and the fan wheel can be increased, and the combination stability of the locking component and the fan wheel can be improved, and the like.

Wherein, the ring groove is located in the inner thread portion, and the inner diameter of the anti-skid ring is smaller than the inner diameter of the inner thread portion. In this way, in the process of tightening the fastener, the external thread portion can tap the anti-skid ring of the fastener, so that the fastener can be stably positioned at a predetermined position on the external thread portion, and has the advantages of lifting the fastener. Functions such as the joint stability of the fastener and the external thread portion.

Wherein, the tightening direction of the fastener combined with the rotating shaft is opposite to the rotation direction of the fan wheel. In this way, the fastener is less likely to be loosened due to the rotation of the fan wheel.

Wherein, the metal axle seat is provided with a groove, a through hole of the metal axle seat is connected to the groove, the hub is provided with a notch and communicated with the groove of the metal axle seat, the shaft is combined with the through hole, the The external thread portion of the rotating shaft is located in the groove and the notch, and the rotating shaft does not pass through the notch. In this way, it has the functions of improving the appearance and the safety of use.

Wherein, the locking component is located in the groove and the notch. In this way, it has the functions of improving the appearance and the safety of use.

Wherein, the metal axle seat is provided with a positioning portion, and the wheel hub is injection-coated and combined with the positioning portion. In this way, the combination stability of the wheel hub and the metal axle seat can be improved, and the like.

Wherein, the rim of the hub is wavy or serrated. In this way, it has the effect of reducing the operation noise when the fan wheel rotates.

Wherein, the locking assembly also has a washer, the washer is sleeved on the rotating shaft and abuts against the metal shaft seat, and the fastener is tightly abutted against the washer. In this way, the components of the locking assembly can be simplified, and a good locking effect can also be achieved.

Wherein, the locking assembly also has a spring washer, the spring washer is sleeved on the rotating shaft and abuts against the metal shaft seat, and the fastener is pressed against the spring washer. In this way, the components of the locking assembly can be simplified, and a good locking effect can also be achieved.

Wherein, the circumferential surface of the rotating shaft is provided with a driving portion, the cross-section of the rotating shaft at the driving portion is non-circular, the driving portion is located between the external thread portion and the other end of the rotating shaft, and the metal shaft seat is combined with The drive department. In this way, it has the effect of improving the convenience of assembly and the like.

Wherein, the rotating shaft forms a shoulder at the end edge of the driving portion farther from the external thread portion, and the metal shaft seat is positioned against the shoulder. In this way, it has the effect of improving the convenience of assembly and the like.

Wherein, the rotating shaft is combined with a through hole of the metal shaft seat, and the cross section of the through hole matches the driving part of the rotating shaft; shoulder of the shaft. In this way, it has the effect of improving the convenience of assembly and the like.

The invention also provides a combination structure of a fan wheel and a rotating shaft, including: a rotating shaft, one end of which is provided with an external thread part; a fan wheel, the fan wheel has a metal shaft seat and a hub, the hub is combined with the a metal shaft seat, the metal shaft seat is combined with the rotating shaft; and a locking component, the locking component has a fastener, the inner circumference of the fastener is provided with an internal thread part and a ring groove, the fastener An anti-skid ring is fastened to the ring groove, the internal thread part of the fastener is screwed with the external thread part of the rotating shaft, and the anti-skid ring of the fastener is combined with the external thread part of the rotating shaft.

Wherein, the locking assembly also has a washer and a spring washer, the washer is sleeved on the rotating shaft and abuts against the metal shaft seat, the spring washer is sleeved on the rotating shaft, and the fastener is pressed against the spring washer sheet to tightly against the gasket. In this way, it has the effect of making the whole locking assembly more difficult to loosen.

Wherein, the locking assembly also has a washer, the washer is sleeved on the rotating shaft and abuts against the metal shaft seat, and the fastener is tightly abutted against the washer. In this way, the components of the locking assembly can be simplified, and a good locking effect can also be achieved.

Wherein, the locking assembly also has a spring washer, the spring washer is sleeved on the rotating shaft and abuts against the metal shaft seat, and the fastener is pressed against the spring washer. In this way, the components of the locking assembly can be simplified, and a good locking effect can also be achieved.

Wherein, the ring groove is located in the inner thread portion, and the inner diameter of the anti-skid ring is smaller than the inner diameter of the inner thread portion. In this way, in the process of tightening the fastener, the external thread portion can tap the anti-skid ring of the fastener, so that the fastener can be stably positioned at a predetermined position on the external thread portion, and has the advantages of lifting the fastener. Functions such as the joint stability of the fastener and the external thread portion.

Wherein, the circumferential surface of the rotating shaft is provided with a driving portion, the cross-section of the rotating shaft at the driving portion is non-circular, the driving portion is located between the external thread portion and the other end of the rotating shaft, and the metal shaft seat is combined with The drive department. In this way, it has the effect of improving the convenience of assembly and the like.

Description of drawings

FIG. 1 is a schematic diagram of a three-dimensional exploded structure of an embodiment of the present invention.

FIG. 2 is a schematic diagram of a three-dimensional exploded structure of a locking assembly according to an embodiment of the present invention.

FIG. 3 is a schematic three-dimensional exploded structure diagram of another perspective view of the locking assembly according to an embodiment of the present invention.

FIG. 4 is a schematic diagram of a combined cross-sectional structure of an embodiment of the present invention.

Figure 5: A partial enlarged view of part A of Figure 4 .

FIG. 6 is a schematic diagram of locking the locking component to the rotating shaft according to an embodiment of the present invention.

Description of reference numerals

1 Drive source 11 Rotary shaft

111 External thread part 112 Driving part

113 Shoulder 12 Base

13 Housing cover 14 Electrical box

15 stator group 16 magnetic parts

2 fan wheels 21 metal axle seat

211 Perforation 212 Positioning part

213 groove 22 hub

221 Slotted 222 Rim

23 fan blades

3 locking components 31 fasteners

311 Internal thread 312 Ring groove

313 Anti-skid ring 314 Skirt

315 Teeth 32 Spacer

33 Spring washer.

Detailed ways

In order to make the above-mentioned and other objects, features and advantages of the present invention more obvious and easy to understand, the preferred embodiments of the present invention are enumerated below, and are described in detail as follows in conjunction with the accompanying drawings:

The following directional or similar terms of the present invention, such as "front", "rear", "top (top)", "bottom (bottom)", "inside", "outside", "side", etc., are mainly Referring to the directions of the drawings, the directions or similar terms are only used to assist the description and understanding of the embodiments of the present invention, and are not intended to limit the present invention.

Please refer to FIG. 1 , which is an embodiment of the fan of the present invention. The fan generally includes a driving source 1 , a fan wheel 2 and a locking component 3 , and the fan wheel 2 and the locking component 3 are combined with the driving source. 1.

The present invention does not limit the type of the driving source 1. The principle is that there is a protruding rotating shaft 11 that can be assembled and drive the fan wheel 2 to rotate. The driving source 1 in this embodiment is illustrated by an inner rotor motor as an example. , but not limited to this. Referring to FIGS. 1 and 4 , in this embodiment, the driving source 1 has a base 12 , and two ends of the base 12 are respectively combined with a casing 13 and an electrical box 14 , and the casing 13 is assembled inside the casing 13 . There is a stator group 15 , the shaft 11 penetrates the stator group 15 and is rotatably disposed on the base 12 , and a magnetic member 16 is combined with the position of the shaft 11 in the casing 13 and is opposite to the stator group 15 . One end of the rotating shaft 11 is provided with an external thread portion 111 , and the external thread portion 111 of the rotating shaft 11 passes through the casing 13 .

A driving portion 112 is provided on the circumferential surface of the rotating shaft 11 . The cross-section of the rotating shaft 11 at the driving portion 112 is non-circular, so that the fan wheel 2 can be engaged in a corresponding shape, so that the rotating shaft 11 can be rotated with the help of The driving part 112 drives the fan wheel 2 to rotate synchronously. The driving portion 112 is located between the external thread portion 111 and the other end of the rotating shaft 11 , that is, in the axial direction of the rotating shaft 11 , the driving portion 112 does not overlap the external thread portion 111 . In addition, a shoulder portion 113 may be formed on the end edge of the driving portion 112 that is farther away from the external thread portion 111 of the rotating shaft 11 , so that the fan wheel 2 can be abutted and positioned. Preferably, the external thread portion 111 , the driving portion 112 and the shoulder portion 113 of the rotating shaft 11 can be selected to pass through the casing 13 , so that the fan wheel 2 can be assembled in alignment, thereby improving the convenience and efficiency of assembly.

The fan wheel 2 is combined and driven to rotate by the rotating shaft 11 . In this embodiment, the fan wheel 2 has a metal shaft seat 21 , a hub 22 and a plurality of fan blades 23 , the hub 22 is combined with the metal shaft seat 21 , and the plurality of fan blades 23 are arranged around the hub 22 the periphery. The metal shaft seat 21 is provided with a through hole 211 for the shaft 11 to pass through. The cross section of the through hole 211 can be matched with the driving portion 112 of the shaft 11 , so that the fan wheel 2 can be clamped by the inner wall of the through hole 211 of the metal shaft seat 21 The driving portion 112 of the rotating shaft 11 is fixedly combined and abuts against the shoulder 113 positioned on the rotating shaft 11 . The metal axle seat 21 can also be provided with a positioning portion 212 , and the positioning portion 212 can be, for example, a plurality of through holes, which can be used for the hub 22 to be injected and combined with the positioning portion 212 , so as to lift the hub 22 and the hub 22 with a simple structure. The bonding stability of the metal axle seat 21 .

It is worth mentioning that the fan wheel 2 of this embodiment is selected to be bonded to the rotating shaft 11 by the metal shaft seat 21 instead of the plastic material. The part where the fan wheel 2 is combined with the rotating shaft 11 (that is, the metal shaft seat 21 ) has better structural strength and is not easy to be damaged, thereby reducing the problem of cracks and other phenomena in the part where the fan wheel 2 is combined with the rotating shaft 11 , so that the The fan of the present invention is more durable in use.

After the fan wheel 2 is coupled to the rotating shaft 11 by the metal shaft seat 21 , the hub 22 can cover the casing 13 of the driving source 1 . The metal axle seat 21 can also be provided with a groove 213, and the through hole 211 can be connected to the groove 213, and the hub 22 can be provided with a recessed groove 221 in communication with the groove 213 of the metal axle seat 21; the shaft After 11 penetrates the metal shaft seat 21, the external thread portion 111 of the rotating shaft 11 can be located in the groove 213 and the groove 221, and the rotating shaft 11 preferably does not pass through the groove 221, so that the rotating shaft 11 does not protrude Due to the outer surface of the wheel hub 22 , in addition to being beautiful, it can also prevent the user from being accidentally scratched by the protruding rotating shaft 11 , and has better safety in use. In addition, the ring rim 222 of the hub 22 can also be wavy or serrated, so as to reduce the operating noise of the fan wheel 2 when it rotates.

Referring to FIGS. 2 and 5 , the locking assembly 3 has a fastener 31 , and an inner threaded portion 311 is disposed on the inner circumference of the fastener 31 to be screwed with the outer threaded portion 111 of the rotating shaft 11 . In this embodiment, the locking assembly 3 preferably further has a washer 32 and a spring washer 33, the washer 32 is sleeved on the rotating shaft 11 and abuts against the metal shaft seat 21 of the fan wheel 2; the spring The washer 33 is sleeved on the rotating shaft 11 , and the fastener 31 can be pressed against the spring washer 33 to be tightly against the washer 32 , so as to achieve the effect of making the overall locking assembly 3 more difficult to loosen. Wherein, the locking element 3 can be located in the groove 213 and the cutout 221, and preferably does not protrude from the cutout 221, so as to achieve the aforementioned aesthetics and better safety in use. In addition, the tightening direction of the fastener 31 combined with the rotating shaft 11 is preferably opposite to the rotation direction of the fan wheel 2; for example, when the fan wheel 2 is set to rotate clockwise, rotate the tightening counterclockwise When the fastener 31 is rotated, the fastener 31 is tightened, and when the fastener 31 is rotated clockwise, the fastener 31 is loosened. Accordingly, the fastener 31 is less likely to be loosened due to the rotation of the fan wheel 2 .

The inner circumference of the fastener 31 is provided with an annular groove 312 , and the fastener 31 has an anti-skid ring 313 which is fastened to the annular groove 312 . Wherein, the anti-skid ring 313 can be made of plastic or nylon (for example, PA6) or the like. The ring groove 312 is located in the inner thread portion 311 , and the inner diameter of the anti-skid ring 313 is smaller than the inner diameter of the inner thread portion 311 . Preferably, a skirt 314 may be provided at one end of the fastener 31 facing the spring washer 33, and the end face of the skirt 314 facing the spring washer 33 is provided with a plurality of protruding teeth 315 (please cooperate with Referring to FIG. 3 ), the spring washer 33 can be clamped to the plurality of protruding teeth 315 to improve the stability of the fastener 31 for fixing the spring washer 33 .

Wherein, the outer diameter of the part of the fastener 31 and the washer 32 for pressing against the spring washer 33 is larger than the outer diameter of the spring washer 33; in this way, even if the washer 32 and the spring washer 33 Slightly skewed after being inserted into the rotating shaft 11 , it can still ensure that the spring washer 33 can be firmly clamped by the fastener 31 and the washer 32 . In addition, the outer diameter of the washer 32 is larger than that of the spring washer 33 and the outer diameter of the fastener 31 to increase the contact area between the washer 32 and the fan wheel 2 , thereby enhancing the locking element 3 and the fan Bonding stability of wheel 2.

Referring to FIGS. 1 and 5 , through the aforementioned structure, when assembling the fan, the fan wheel 2 can be combined and positioned to the rotating shaft 11 of the driving source 1 by the metal shaft seat 21 , and the external thread portion 111 of the rotating shaft 11 can be fixed. Pass through the metal axle seat 21 . Next, the washer 32 and the spring washer 33 are sleeved on the rotating shaft 11 , and the washer 32 abuts the metal shaft seat 21 .

Please refer to FIG. 1 and FIG. 6 , continue to screw the fastener 31 to the external thread portion 111 of the rotating shaft 11 , and press the fastener 31 toward the end surface of the spring washer 33 during the screwing process. The spring washer 33 is deformed so that the spring washer 33 can be tightly clamped by the washer 32 and the fastener 31 . Wherein, since the fastener 31 is provided with the anti-skid ring 313 , and the inner diameter of the anti-skid ring 313 is smaller than the inner diameter of the inner thread portion 311 , the fastener 31 is screwed to the outer thread portion 111 during the process , the external thread portion 111 can tap the anti-skid ring 313, so that the fastener 31 can be fitted and combined with the external thread portion 111 at least at the anti-skid ring 313, so as to be firmly positioned on the external thread portion 111. At the predetermined position, even if the fan will vibrate during the operation, it will hardly affect the fastener 31, so it is extremely difficult for the fastener 31 to gradually loosen, so that the locking component 3 Make sure that the fan wheel 2 is firmly combined with the rotating shaft 11 .

It is worth mentioning that the locking assembly 3 can also only have the fastener 31 and the washer 32 without the spring washer 33 , and the washer 32 is sleeved on the rotating shaft 11 and abuts against the metal shaft seat 21 , and is pressed against the gasket 32 by the fastener 31 . Alternatively, the locking assembly 3 may only have the fastener 31 and the spring washer 33 without the washer 32 , the spring washer 33 is sleeved on the rotating shaft 11 and abuts against the metal shaft seat 21 , and is The fastener 31 abuts against the spring washer 33 . In this way, the components of the locking assembly 3 can be simplified, and a good locking effect can also be achieved.

To sum up, the fan of the present invention can improve the combination stability of the fan wheel and the rotating shaft with the help of the metal shaft seat, and effectively prevent the structure of the fan wheel from being damaged by the rotating shaft, so that the fan can be used more durable; at the same time, The fan of the present invention can also use the locking component that can prevent loosening to ensure the stable combination of the fan wheel and the rotating shaft, which can not only avoid the operation noise of the fan during operation, but also make the user not need to constantly check whether the fan wheel and the rotating shaft are not. Still firmly bonded for improved ease of use.

Although the present invention has been described by using the above-mentioned preferred embodiments, it is not intended to limit the protection scope of the present invention. Any person skilled in the art can make various changes relative to the above-mentioned embodiments without departing from the spirit and scope of the present invention. and modifications still belong to the protection scope of the present invention, therefore, the protection scope of the present invention should be defined by the claims.

Claims (22)

1. A fan, characterized in that it comprises: a driving source, the driving source has a rotating shaft, and one end of the rotating shaft is provided with an external thread part; a fan wheel, the fan wheel has a metal axle seat and a hub, the wheel hub is combined with the metal axle seat, and the metal axle seat is combined with the rotating shaft; and A locking assembly, the locking assembly has a fastener, the inner circumference of the fastener is provided with an internal thread portion and a ring groove, the fastener has a non-slip ring to be fastened to the ring groove, the fastener The inner thread part of the fastener is screwed with the outer thread part of the rotating shaft, and the anti-skid ring of the fastener is combined with the outer thread part of the rotating shaft. 2 . The fan of claim 1 , wherein the locking assembly further has a washer and a spring washer, the washer is sleeved on the rotating shaft and abuts against the metal shaft seat, and the spring washer is sleeved. 3 . On the rotating shaft, the fastener is pressed against the spring washer so as to be tightly pressed against the washer. 3 . The fan of claim 2 , wherein one end of the fastener facing the spring washer is provided with a skirt, and an end surface of the skirt facing the spring washer is provided with a plurality of protruding teeth. 4 . 4 . The fan of claim 2 , wherein the outer diameter of the portion of the fastener and the washer for pressing against the spring washer is larger than the outer diameter of the spring washer. 5 . 5 . The fan of claim 2 , wherein the outer diameter of the washer is larger than the outer diameters of the spring washer and the fastener. 6 . 6 . The fan of claim 1 , wherein the ring groove is located in the inner thread portion, and an inner diameter of the anti-skid ring is smaller than an inner diameter of the inner thread portion. 7 . 7 . The fan of claim 1 , wherein the tightening direction of the fastener combined with the rotating shaft is opposite to the rotating direction of the fan wheel. 8 . 8 . The fan of claim 1 , wherein the metal shaft seat is provided with a groove, a through hole of the metal shaft seat is connected to the groove, and the hub is provided with a groove and the metal shaft seat. 9 . The grooves are relatively connected, the rotating shaft is combined with the through hole, the external thread portion of the rotating shaft is located in the groove and the notch, and the rotating shaft does not pass through the notch. 9 . The fan of claim 8 , wherein the locking element is located in the groove and the notch. 10 . 10 . The fan as claimed in claim 1 , wherein the metal shaft seat is provided with a positioning portion, and the hub is injection-coated and combined with the positioning portion. 11 . 11. The fan of claim 1, wherein the rim of the hub is wavy or serrated. 12 . The fan of claim 1 , wherein the locking assembly further has a gasket, the gasket is sleeved on the rotating shaft and abuts against the metal shaft seat, and the fastener is tightly against the gasket. 13 . 13 . The fan of claim 1 , wherein the locking assembly further has a spring washer, the spring washer is sleeved on the rotating shaft and abuts against the metal shaft seat, and the fastener is abutted against the spring 13 . gasket. 14. The fan according to any one of claims 1 to 13, wherein a driving portion is provided on the circumferential surface of the rotating shaft, the cross-section of the rotating shaft at the driving portion is non-circular, and the driving portion Located between the external thread portion and the other end of the rotating shaft, the metal shaft seat is combined with the driving portion. 15 . The fan of claim 14 , wherein a shoulder is formed on the end edge of the driving portion farther away from the external thread portion of the rotating shaft, and the metal shaft seat is positioned against the shoulder. 16 . 16 . The fan of claim 15 , wherein the shaft is combined with a through hole of the metal shaft seat, the cross section of the through hole is matched with the driving part of the shaft, and the fan wheel is formed by the inner wall of the through hole of the metal shaft seat. 17 . The driving part of the rotating shaft is clamped and fixed and is positioned against the shoulder of the rotating shaft. 17. A combined structure of a fan wheel and a rotating shaft, characterized in that it comprises: A rotating shaft, one end of the rotating shaft is provided with an external thread part; a fan wheel, the fan wheel has a metal axle seat and a hub, the wheel hub is combined with the metal axle seat, and the metal axle seat is combined with the rotating shaft; and A locking assembly, the locking assembly has a fastener, the inner circumference of the fastener is provided with an internal thread portion and a ring groove, the fastener has a non-slip ring to be fastened to the ring groove, the fastener The inner thread part of the fastener is screwed with the outer thread part of the rotating shaft, and the anti-skid ring of the fastener is combined with the outer thread part of the rotating shaft. 18. The combination structure of the fan wheel and the rotating shaft as claimed in claim 17, wherein the locking assembly further has a washer and a spring washer, the washer is sleeved on the rotating shaft and abuts against the metal shaft seat , the spring washer is sleeved on the rotating shaft, and the fastener is pressed against the spring washer so as to be tight against the washer. 19 . The combination structure of the fan wheel and the rotating shaft as claimed in claim 17 , wherein the locking assembly further has a washer, the washer is sleeved on the rotating shaft and abuts against the metal shaft seat, and the fastener against the gasket. 20 . The combination structure of the fan wheel and the rotating shaft as claimed in claim 17 , wherein the locking assembly further has a spring washer, the spring washer is sleeved on the rotating shaft and abuts against the metal shaft seat, and the fastener 20 . The fastener is fastened against the spring washer. 21 . The combination structure of the fan wheel and the rotating shaft as claimed in claim 17 , wherein the ring groove is located in the inner thread portion, and the inner diameter of the anti-skid ring is smaller than the inner diameter of the inner thread portion. 22 . 22. The combination structure of the fan wheel and the rotating shaft according to any one of claims 17 to 21, wherein a driving portion is provided on the circumferential surface of the rotating shaft, and the cross-section of the rotating shaft at the driving portion is non-linear. A circular shape, the driving portion is located between the external thread portion and the other end of the rotating shaft, and the metal shaft seat is combined with the driving portion.