TWM529079U - Fan and motor shaft thereof - Google Patents

Description

Fan unit and its motor shaft

The present invention relates to a fan device, and more particularly to a fan device for preventing noise and a rotating shaft thereof.

Referring to FIG. 1, a state of a conventional shaft assembly of a fan motor is illustrated. Here, FIG. 1 is a simplified schematic view, and other necessary components of the fan motor are not depicted. The fan motor comprises a shaft 1 in the form of a long rod, the shaft 1 comprising a transmission section 11 for a blade assembly 2. When the fan motor is running, the rotating shaft 1 drives the blade assembly 2 to rotate to blow out the airflow. In order to prevent the rotation of the shaft 1 without rotating the blade assembly 2, the transmission section 11 is usually cut so that the section of the transmission section 11 is substantially semi-circular. In this way, the rotation of the rotating shaft 1 relative to the blade assembly 2 can be avoided.

However, since the above-mentioned transmission section 11 is cut, its center of gravity position is deviated from the axis of the rotating shaft 1, which causes the blade assembly 2 to vibrate when rotating to generate noise, and even reduce the service life of the blade assembly 2.

Accordingly, it is an object of the present invention to provide a fan apparatus that reduces noise generated by vibration of a blade assembly during operation of the motor.

Therefore, another object of the present invention is to provide a rotating shaft of a fan unit capable of reducing noise generated by vibration of a blade assembly during operation of the motor.

Thus, the novel fan assembly includes a motor and a blade assembly. The motor includes a rotor and a rotating shaft coupled to the rotor, wherein the rotating shaft is driven by the rotor to rotate about a central axis of the rotating shaft. The rotating shaft has a rod body having a main body section and a transmission section. The main body segment is for fixedly connecting the rotor, the transmission segment extending from one end of the main body segment, and having at least two limiting portions symmetrically distributed with respect to the central axis such that the center of gravity of the transmission segment coincides with the central axis The end of the transmission section is provided with an external thread. The blade assembly includes a body, a plurality of blades connecting the body, and a stop. The body has a cross-sectional contour and a limiting hole of the transmission section of the rod body having a cross-sectional contour at the limiting portion for the transmission section to pass through and the limiting portion is located at the limiting hole Internally, the body is positioned opposite to the transmission section, and the stopping member is threaded and locked at the end of the transmission section to lock the end of the transmission section to block the body from being disengaged from the rotating shaft.

In some embodiments, the rod body further has an axial through hole extending axially through the rod body, and a plurality of radial perforations disposed in the main body portion and communicating and perpendicular to the axial through hole, the axial direction The through hole is filled with a lubricant so that the lubricant can seep through the radial perforations to the outer peripheral surface of the body segment.

In some embodiments, the shaft further has two openings respectively located at both ends and communicating with the axial through holes, and the rotating shaft further comprises two seals for respectively closing the openings.

In some embodiments, each of the seals is a screw, and an internal thread for locking the screw is formed at each end of the rod.

In some embodiments, the transmission section has two limiting portions symmetric with the central axis, and each of the limiting portions has a latching surface, and the limiting portion of the driving segment is offset by the card The body positions the body relative to the transmission section to drive the body to rotate about the central axis.

In some embodiments, the transmission segment further has an end surface that is perpendicular to the central axis, and the card abutting surfaces extend from opposite sides of the end surface to the body segment and are quadrangular.

In some embodiments, the transmission segment further has a circular arc surface extending from opposite sides of the end surface to the main body segment and respectively connecting the abutting surfaces of the card, and the external thread of the transmission segment is formed on the arc surface.

In some embodiments, the transmission section has three limiting portions that are rotationally symmetric with respect to the central axis, and each of the limiting portions has a latching surface, and the limiting portion of the transmission segment is used by the card The facing card is opposite to the body to position the body relative to the transmission section to drive the body to rotate about the central axis.

In some implementations, the transmission segment also has a shaft hanging from the center An end face that is straight and has an equilateral triangle shape, and a three-arc surface, the card abutting surface extends from the end surface to the main body segment and each arc surface is connected to two adjacent card abutting faces, and the transmission segment is externally threaded It is formed on the arc surfaces.

Therefore, the rotating shaft of the motor of the present invention is used for connecting a rotor of a motor to be driven by the rotor to rotate around a central axis of the rotating shaft, the rotating shaft comprising a rod body having a main body section and a transmission section . The body segment is fixedly coupled to the rotor, the transmission segment extending from one end of the body segment and having at least two stops symmetrically distributed relative to the central axis such that the center of gravity of the transmission segment coincides with the central axis. The transmission segment is used for arranging an object, and the positioning portion is positioned opposite to the object to drive the object to rotate about the central axis.

The present invention has at least the following effects: the center of gravity of the transmission section of the shaft coincides with the central axis, so that the blade assembly sleeved on the transmission section does not cause noise due to strong vibration when rotating.

1‧‧‧ shaft

11‧‧‧ Transmission section

2‧‧‧Fan blade assembly

200‧‧‧ motor

21‧‧‧ shaft

22‧‧‧ rod body

20‧‧‧Rotor

23‧‧‧ main body

24‧‧‧ Transmission section

241‧‧‧Limited

242‧‧‧ end face

243‧‧‧ card to face

244‧‧‧Arc face

245‧‧‧ external thread

25‧‧‧ bushings

26‧‧‧Axial through hole

27‧‧‧ Radial perforation

28‧‧‧ openings

29‧‧‧Seal

3‧‧‧‧‧‧Fan blade assembly

31‧‧‧Ontology

311‧‧‧ Limit hole

32‧‧‧ blades

33‧‧‧stops

L1‧‧‧ central axis

Other features and effects of the present invention will be apparent from the following description of the drawings. FIG. 1 is a schematic diagram illustrating a conventional shaft of a fan motor; FIG. 2 is a first embodiment of the novel fan apparatus. An incomplete three-dimensional decomposition diagram of an example; 3 is a partial cross-sectional view showing the internal structure of a rotating shaft; and FIG. 4 is an incomplete perspective exploded view of the second embodiment of the novel fan device.

Before the present invention is described in detail, it should be noted that in the following description, similar elements are denoted by the same reference numerals.

Referring to Figures 2 and 3, a first embodiment of the novel fan assembly includes a motor 200 and a blade assembly 3. The motor 200 includes a rotor 20 (see FIG. 3) and a shaft 21. The shaft 21 includes a rod body 22 having a cylindrical body portion 23 fixedly coupled to the rotor 20 of the motor 200 such that the shaft 21 can be operated while the motor 200 is in operation. The rotor 20 rotates around its central axis L1.

The shaft 22 includes a transmission section 24 extending from one end of the body section 23, the length and diameter of the transmission section 24 being smaller than the body section 23, and the center of gravity thereof is located on the central axis L1. The transmission section 24 has an end surface 242 perpendicular to the central axis L1, and a limiting portion 241 symmetrical to the central axis L1. Each of the limiting portions 241 has a latching surface 243 extending from opposite sides of the end surface 242 to the main body segment 23 and having a rectangular shape. The transmission section 24 also has two separate from the end surface 242 The outer opposite sides extend to the arcuate surface 244 of the body section 23, and the transmission section 24 further has an external thread 245 disposed at the end of the transmission section 24 and formed on the arcuate faces 244.

The blade assembly 3 includes a body 31, a plurality of blades 32 connecting the body 31, and a stop member 33. The body 31 has a limiting hole 311 for the transmission section 24 of the rod 22 to pass through, and the limiting hole 311 and the transmission section 24 have the same cross-sectional profile. When the rotating shaft 21 rotates, the engaging surfaces 243 of the limiting portion 241 are engaged with the circumferential surface of the limiting hole 311, so that the limiting portions 241 are positioned opposite to the body 31. Thereby, the body 31 can be rotated by the rotating shaft 21 to rotate around the central axis L1. The stopper 33 is fixed to the end of the transmission section 24 in a manner of being screwed to the external thread 245 of the transmission section 24 to prevent the body 31 from being disengaged from the rotation shaft 21 in the direction of the central axis L1 when rotating. Since the center of gravity of the transmission section 24 of the rod body 22 coincides with the central axis L1, there is no problem of shaking vibration caused by the eccentricity, so that the blade assembly 3 sleeved on the transmission section 24 does not rotate. Noise can be generated due to strong vibration.

Referring to FIG. 3, the motor 200 further includes two sleeves 25 that are rotatably sleeved on the main body segments 23 of the rotating shaft 21 and distributed on both sides of the rotor 20. The rod body 22 is formed with an axial through hole 26 parallel to the central axis L1 and penetrating the rod body 22, and two radial through holes 27 respectively disposed at positions where the main body portion 23 corresponds to the outer sleeve 25. The axial through hole 26 is filled with a lubricant, and the radial through hole 27 is vertical and connected The axial through hole 26 is such that the lubricant penetrates between the main body section 23 and the sleeves 25 via the radial through holes 27, thereby lubricating the rotating shaft 21, thereby increasing the service life of the motor 200. .

The rod body 22 further has two openings 28 respectively at both ends and communicating with the axial through holes 26, and the rod body 22 is formed with an internal thread at each end. The spindle 21 also includes two screws, each for locking a corresponding internal thread to seal the opening 28, thereby sealing the lubricant in the axial through bore 26.

Referring to Figure 4, a second embodiment of the novel fan assembly, which is substantially identical to the first embodiment, differs in the transmission section 24 of the shaft 22. The transmission section 24 of the second embodiment has an end surface 242 perpendicular to the central axis, and three limiting portions 241 that are rotationally symmetric with respect to the central axis L1. The end surface 242 is substantially equilateral triangle, and each of the limiting portions 241 has a latching surface 243 extending from one side of the end surface 242 to the main body portion 23. The transmission section 24 also has a three-arc surface 244, each of which is connected to two adjacent abutment faces 243 and the external threads 245 of the transmission section 24 are formed on the arcuate faces 244. The transmission section 24 is formed by cutting the rod body 22, thereby controlling the arcuate faces 244 to have the same distance from the central axis L1, so that the external thread 245 is provided at the end of the transmission section 24.

In summary, in the novel fan device, the center of gravity of the transmission section 24 of the shaft 22 coincides with the central axis L1 of the rotating shaft 21, so that the blade assembly 3 sleeved on the transmission section 24 does not cause strong vibration when rotated. Noise is generated, so it is indeed possible to achieve this new type. purpose. In addition, when the rotating shaft 21 rotates, the lubricant will seep out through the radial through holes 27 to provide lubrication between the rod body 22 and the sleeve 25, so as to improve the service life of the motor 200.

However, the above is only the embodiment of the present invention, and when it is not possible to limit the scope of the present invention, all the simple equivalent changes and modifications according to the scope of the patent application and the contents of the patent specification are still This new patent covers the scope.

21‧‧‧ shaft

22‧‧‧ rod body

23‧‧‧ main body

24‧‧‧ Transmission section

241‧‧‧Limited

242‧‧‧ end face

243‧‧‧ card to face

244‧‧‧Arc face

245‧‧‧ external thread

29‧‧‧Seal

3‧‧‧Fan blade assembly

31‧‧‧Ontology

311‧‧‧ Limit hole

32‧‧‧ blades

33‧‧‧stops

L1‧‧‧ central axis

Claims (18)

A fan device comprising a motor, comprising a rotor, and a rotating shaft connecting the rotor, wherein the rotating shaft is driven by the rotor to rotate around a central axis of the rotating shaft, the rotating shaft has a rod body, and the rod body has a main body a segment, fixedly coupled to the rotor, and a transmission segment extending from one end of the body segment and having at least two limiting portions symmetrically distributed with respect to the central axis such that a center of gravity of the transmission segment coincides with the central axis The end of the transmission section is provided with an external thread; and a blade assembly includes a body, a plurality of blades connecting the body, and a stopper having a cross-sectional profile and the transmission section of the shaft a limiting hole corresponding to the cross-sectional contour of the limiting portion for the driving segment to pass through and the limiting portion is located in the limiting hole, so that the body is positioned opposite to the transmission segment, the blocking The external thread of the transmission section is screwed and locked at the end of the transmission section to block the body from being disengaged from the rotating shaft. The fan device of claim 1, wherein the rod body further has an axial through hole extending axially through the rod body, and a plurality of radial holes disposed in the main body portion and communicating and perpendicular to the axial through hole A perforation, the axial through hole being filled with a lubricant to allow the lubricant to seep through the radial perforations to the outer peripheral surface of the body segment. The fan device of claim 2, wherein the shaft further has two openings respectively located at both ends and communicating with the axial through holes, the rotating shaft further comprising two sealing members respectively for closing the openings. The fan device of claim 3, wherein each of the sealing members is a screw, and both ends of the rod body are formed with internal threads for locking the screws. The fan device according to any one of claims 1 to 4, wherein the transmission section has two limiting portions symmetric with the central axis, and each limiting portion has a snap-to-face, the transmission segment The limiting portion positions the body relative to the transmission section by the card facing card, so as to drive the body to rotate around the central axis. The fan unit of claim 5, wherein the transmission section further has an end surface perpendicular to the central axis, the card abutting surfaces extending from opposite sides of the end surface to the main body section and having a quadrangular shape. The fan unit of claim 6, wherein the transmission section further has a circular arc surface extending from opposite sides of the end surface to the main body section and respectively connecting the card abutting surfaces, and the external thread of the transmission section is formed. On these arc surfaces. The fan device according to any one of claims 1 to 4, wherein the transmission section has three limiting portions that are rotationally symmetrical with respect to the central axis, and each of the limiting portions has a snap-fit surface. The limiting portion of the transmission segment is positioned relative to the transmission segment by the card abutting surface against the body to drive the body to rotate about the central axis. The fan device of claim 8, wherein the transmission segment further has an end face perpendicular to the central axis and having a substantially triangular cross section, and a three-arc surface extending from the end surface to the main body segment And each arc surface is connected to two adjacent card abutting faces, and the outer threads of the transmission segment are formed on the arc faces. a rotating shaft of a motor for connecting a rotor of a motor to receive the rotor Rotating around a central axis of the rotating shaft, the rotating shaft comprising: a rod body having a main body section fixedly coupled to the rotor; and a transmission section extending from one end of the main body section and having at least two relative to The central axis is a symmetrically distributed limiting portion such that the center of gravity of the transmission segment coincides with the central axis, the transmission segment is for arranging an object, and the limiting portion is positioned relative to the object to drive the The object rotates around the central axis. The end of the transmission section is provided with an external thread for locking and locking the end of the transmission section, and the stopper is for blocking the object from being disengaged from the rotating shaft. The shaft of the motor of claim 10, wherein the rod body further has an axial through hole extending axially through the rod body, and a plurality of paths disposed in the body portion and communicating and perpendicular to the axial through hole To the perforations, the axial through holes are filled with a lubricant to allow the lubricant to seep through the radial perforations to the outer peripheral surface of the body segment. The shaft of the motor of claim 11, wherein the shaft further has two openings respectively located at both ends and communicating with the axial through holes, the rotating shaft further comprising two seals respectively for closing the openings. The shaft of the motor of claim 12, wherein each of the seals is a screw, and an inner thread for locking the screw is formed at each end of the rod. The shaft of the motor of any one of claims 10 to 13, wherein the transmission section has two limiting portions symmetrical to the central shaft, and each limiting portion has a snapping surface, the transmission section The limiting portion positions the object relative to the transmission segment by the card facing the surface card to drive the object around the object The center axis rotates. The shaft of the motor of claim 14, wherein the transmission section further has an end surface perpendicular to the central axis, the card abutting surfaces extending from opposite sides of the end surface to the main body section and having a quadrangular shape. The shaft of the motor of claim 15, wherein the transmission section further has a circular arc surface extending from opposite sides of the end surface to the main body section and respectively connecting the opposite surfaces of the card, the external thread of the transmission section is Formed on the arc surfaces. The rotating shaft of the motor according to any one of claims 10 to 13, wherein the transmission section has three limiting portions that are rotationally symmetrical with respect to the central axis, and each of the limiting portions has a snap-to-face The limiting portion of the transmission segment positions the object relative to the transmission segment by the card against the object to drive the object to rotate about the central axis. The shaft of the motor of claim 17, wherein the transmission section further has an end surface perpendicular to the central axis and having an equilateral triangle shape, and a three-arc surface from which the card abutment extends to the main body And each arc surface is connected to two adjacent card abutting faces, and the outer threads of the transmission segment are formed on the arc faces.