A low noise 360 degree oscillating fan

Abstract

The utility model discloses a low noise 360 degree head shaking fan, including fan assembly, frame and head shaking drive mechanism, and fan assembly is equipped with the pivot for connecting with the fan blade, and the head shaking drive mechanism includes head shaking drive motor and curved arm, and head shaking drive motor sets up on the frame, and the curved arm includes the joint head and the output head, and the central axis of joint head and the central axis of output head form certain angle, and the joint head is transmission connection with the output shaft of head shaking drive motor, and the output head is coaxial with the central axis of pivot and is set up with fan assembly and rotates each other, and the output shaft is with joint head axial fixed fit, and the output head is with fan assembly axial limit fit, and the relative surface between output head and fan assembly is also equipped with soft washer, and soft washer eliminates the axial gap between output head and fan assembly, thereby avoids the relative axial sliding collision of three when working, to avoid producing the noise, and also, the risk of parts collision wear and tear is reduced.

Description

Technical Field

[0001] This utility model relates to a 360-degree oscillating fan, and more particularly to a low-noise 360-degree oscillating fan. Background Technology

[0002] Current 360-degree oscillating fans mainly consist of a fan drive motor, a frame, and an oscillation drive mechanism. The fan drive motor's housing is fitted to the frame via an anti-rotation limiting component. The fan drive motor has a rotating shaft for connecting to the fan blades. The oscillation drive mechanism includes an oscillation drive motor and a curved arm. The oscillation drive motor is mounted on the frame, and the curved arm includes a coupling head and an output head. The central axis of the coupling head and the central axis of the output head form a certain angle. The coupling head is drive-connected to the output shaft of the oscillation drive motor. The output head is coaxial with the central axis of the rotating shaft and rotates with the fan assembly. To prevent the fan drive motor from detaching from the output head, the rotating shaft and the output head are connected by locking screws. However, because the rotational engagement between the output head and the rotating shaft needs to be maintained, the locking screws cannot be tightened. This results in axial sliding between the fan drive motor and the curved arm. During oscillation, the relative axial sliding collision between the fan drive motor and the curved arm generates noise. Additionally, the output shaft of the oscillation drive motor is plugged into the coupling head, which also experiences axial sliding, similarly generating collision noise. Utility Model Content

[0003] The purpose of this utility model is to provide a low-noise 360-degree oscillating fan with a reasonable structure that eliminates the axial gap between the oscillating drive motor shaft and the crank arm, as well as between the crank arm and the fan assembly.

[0004] The purpose of this utility model is achieved as follows: A low-noise 360-degree oscillating fan includes a fan assembly, a frame, and an oscillation drive mechanism. The fan assembly has a rotating shaft for connecting to the fan blades. The oscillation drive mechanism includes an oscillation drive motor and a curved arm. The oscillation drive motor is mounted on the frame. The curved arm includes a coupling head and an output head. The central axis of the coupling head and the central axis of the output head form a certain angle. The coupling head is drively connected to the output shaft of the oscillation drive motor. The output head is coaxially arranged with the central axis of the rotating shaft and rotates with the fan assembly. The output shaft is axially fixedly fitted with the coupling head, and the output head is axially limitedly fitted with the fan assembly. A soft washer is also provided between the opposing surfaces of the output head and the fan assembly to eliminate the axial gap between the output head and the fan assembly.

[0005] The objective of this utility model can also be achieved by the following technical measures: As a more specific solution, the output shaft of the oscillating drive motor is provided with a horizontal hole, and the coupling head of the crank arm is provided with a relief groove corresponding to the horizontal hole. A horizontal pin is provided in the relief groove and is inserted into the horizontal hole to form an axial limiting fit.

[0006] As a further embodiment, the side wall of the output shaft is provided with a cross-section, which leads to the outer end of the output shaft; the transverse hole is provided on the cross-section and radially penetrates the output shaft, and the inner end of the output shaft corresponding to the cross-section is provided with a limiting step; the coupling head of the crank arm is sleeved with the output shaft, and the end face of the crank arm abuts against the limiting step.

[0007] As a further embodiment, a locking screw is provided between the output head of the crank arm and the fan assembly. The locking screw is installed from the side of the output head of the crank arm facing away from the fan assembly and passes through the output head to connect with the fan assembly; the soft washer is an O-ring silicone ring or an O-ring rubber ring.

[0008] As a further embodiment, the fan assembly includes a fan blade drive motor, the fan blade drive motor is equipped with the rotating shaft, and the housing of the fan blade drive motor is engaged with the frame through an anti-rotation limiting component; the output head of the crank arm is connected to the anti-rotation limiting component or the rotating shaft.

[0009] As a further embodiment, the anti-rotation limiting component includes a limiting hole and a limiting rod. The outer diameter of the limiting rod is smaller than the inner diameter of the limiting hole. The limiting rod extends into the limiting hole. When the fan assembly oscillates, the limiting rod rotates relative to the limiting hole. The limiting hole and the limiting rod are respectively installed on the fan drive motor and the frame.

[0010] As a further embodiment, the fan assembly also includes a limiting plate, which is disposed on the fan blade drive motor, and the limiting hole located on the fan blade drive motor is disposed on the limiting plate.

[0011] As a further embodiment, the limiting plate is located on the rear end of the fan drive motor. The limiting plate has a shaft head corresponding to the central axis of the rotating shaft, which rotates and engages with the output head of the crank arm. The locking screw is connected to the rear end of the shaft head, and the soft washer is sleeved on the outside of the shaft head.

[0012] As a further embodiment, the limiting plate is disposed on the front end of the fan drive motor, and the rotating shaft passes through the center of the limiting plate; the rear end of the rotating shaft is rotatably engaged with the output head of the crank arm, the locking screw is connected to the rear end of the rotating shaft, and the soft washer is sleeved on the outside of the rotating shaft.

[0013] As a further embodiment, a bushing is also fitted over the rotating shaft, and the bushing is positioned between the rear end of the housing of the fan drive motor and the soft washer.

[0014] As a further embodiment, the frame includes a front cover and a rear cover, and the fan assembly is located within the space enclosed by the rear cover and the front cover; the oscillation drive motor is mounted on the rear cover, and the rear cover has a wire outlet hole corresponding to the periphery of the oscillation drive motor, with a second wire-binding rod on the wire outlet hole, and the rotating shaft extends from the front end face of the front cover.

[0015] The beneficial effects of this utility model are as follows: (1) The present invention provides a soft washer between the crank arm and the fan assembly to eliminate the axial gap between the output head and the fan assembly. The output shaft of the oscillating drive motor and the crank arm are connected by transmission. When the axial limit is engaged, the relative axial movement is limited, thereby avoiding relative axial sliding and collision between the three parts during operation, so as to avoid noise. At the same time, it also reduces the risk of collision and wear of parts.

[0016] (2) The limiting plate and the limiting rod of this utility model have no mechanical connection relationship, but only a positioning and matching relationship, which makes installation more convenient. Moreover, the mechanical stress and wear are small, making it less prone to damage and reducing working noise. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the first embodiment of the present invention.

[0018] Figure 2 This is a cross-sectional view of the first embodiment of the present invention.

[0019] Figure 3 for Figure 2 Enlarged structural diagram at point A in the middle.

[0020] Figure 4 This is a partial exploded view of the components in the first embodiment of this utility model.

[0021] Figure 5 for Figure 4 A schematic diagram of the structure of the middle part from another angle.

[0022] Figure 6 This is a three-dimensional structural diagram of the curved arm at an angle in the first embodiment of this utility model.

[0023] Figure 7 This is a three-dimensional structural diagram of the crank arm from another angle in the first embodiment of this utility model.

[0024] Figure 8 This is a three-dimensional structural diagram of the second embodiment of the present invention.

[0025] Figure 9 This is a cross-sectional view of the second embodiment of the present invention.

[0026] Figure 10 for Figure 9 Enlarged structural diagram at point B.

[0027] Figure 11 This is a partial exploded view of the components in the second embodiment of this utility model.

[0028] Figure 12for Figure 11 A schematic diagram of the structure of the middle part from another angle. Detailed Implementation

[0029] The present invention will be further described below with reference to the accompanying drawings and embodiments: First embodiment, see Figures 1 to 7 As shown, a low-noise 360-degree oscillating fan includes a fan assembly, a frame 1, and an oscillation drive mechanism. The fan assembly has a rotating shaft 21 for connecting with the fan blades. The oscillation drive mechanism includes an oscillation drive motor 3 and a crank arm 5. The oscillation drive motor 3 is mounted on the frame 1. The crank arm 5 includes a coupling head 54 and an output head 56. The central axis of the coupling head 54 and the central axis of the output head 56 form a certain angle. The coupling head 54 is connected to the output shaft 31 of the oscillation drive motor 3. The output head 56 is coaxially arranged with the central axis of the rotating shaft 21 and rotates with the fan assembly. The output shaft 31 is axially fixedly fitted with the coupling head 54, and the output head 56 is axially limitedly fitted with the fan assembly. A soft washer 53 is also provided between the opposite surfaces of the output head 56 and the fan assembly to eliminate the axial gap between the output head 56 and the fan assembly.

[0030] The output shaft 31 of the oscillating drive motor 3 is provided with a horizontal hole 32. The coupling head 54 of the crank arm 5 is provided with a relief groove 55 corresponding to the horizontal hole 32. A horizontal pin 52 is provided in the relief groove 55. The horizontal pin 52 is inserted into the horizontal hole 32 to form an axial limiting fit.

[0031] The side wall of the output shaft 31 is provided with a cut surface, which leads to the outer end of the output shaft 31; the transverse hole 32 is provided on the cut surface and radially penetrates the output shaft 31, and the inner end of the output shaft 31 corresponding to the cut surface is provided with a limiting step 33; the coupling head 54 of the crank arm 5 is sleeved with the output shaft 31, and the end face of the crank arm 5 abuts against the limiting step 33.

[0032] A locking screw 51 is also provided between the output head 56 of the crank arm 5 and the fan assembly. The locking screw 51 is installed from the side of the output head 56 of the crank arm 5 facing away from the fan assembly and passes through the output head 56 to connect with the fan assembly. The soft washer 53 is an O-ring silicone ring or an O-ring rubber ring.

[0033] The fan assembly includes a fan drive motor 2, which is equipped with the rotating shaft 21. The housing of the fan drive motor 2 is connected to the frame 1 through an anti-rotation limiting component. The output head 56 of the crank arm 5 is connected to the anti-rotation limiting component or the rotating shaft 21.

[0034] The anti-rotation limiting component includes a limiting hole 41 and a limiting rod 6. The outer diameter of the limiting rod 6 is smaller than the inner diameter of the limiting hole 41. The limiting rod 6 extends into the limiting hole 41. When the fan assembly shakes, the limiting rod 6 rotates relative to the limiting hole 41. The limiting hole 41 and the limiting rod 6 are respectively installed on the fan drive motor 2 and the frame 1.

[0035] The fan assembly also includes a limiting plate 4, which is disposed on the fan blade drive motor 2, and a limiting hole 41 located on the fan blade drive motor 2 is disposed on the limiting plate 4.

[0036] The limiting plate 4 is located on the rear end of the fan drive motor 2. The limiting plate 4 has a shaft head 42 corresponding to the central axis of the rotating shaft 21. The output head 56 of the crank arm 5 rotates and cooperates with the shaft head 42. The locking screw 51 is connected to the rear end of the shaft head 42. The soft washer 53 is sleeved on the outside of the shaft head 42.

[0037] The limiting disk 4 is disc-shaped, and the shaft head 42 is located at its center.

[0038] Three limiting holes 41 are provided, and the limiting holes 41 are evenly distributed around the center of the rotating shaft 21. The size, shape, and position distribution of the limiting holes 41 are determined according to the oscillation trajectory of the fan drive motor 2, and the limiting holes 41 change with the distance from the oscillation center point along the axis of the rotating shaft 21. Since the entire fan assembly is rotated and engaged with the output head 56 of the crank arm 5 of the oscillation drive mechanism, without the limiting effect of the limiting holes 41 and the limiting rod 6, the fan assembly may rotate 360 ​​degrees around the output head 56 as the axis during the oscillation process, causing the wires to become entangled. By setting the above-mentioned limiting structure, this situation can be avoided.

[0039] The surface of the limiting plate 4 is provided with a wire hole 44, and the side wall of the wire hole 44 is provided with a wire binding rod 43.

[0040] The frame 1 includes a front cover 11 and a rear cover 12. The fan assembly is located in the space surrounded by the rear cover 12 and the front cover 11. The oscillating drive motor 3 is mounted on the rear cover 12. The rear cover 12 is provided with a wire outlet hole 13 corresponding to the periphery of the oscillating drive motor 3. A second wire binding rod 131 is provided on the wire outlet hole 13. The rotating shaft 21 extends from the front end face of the front cover 11.

[0041] The fan assembly also includes a control circuit board 22, which is located at the rear end of the housing of the fan drive motor 2 and in front of the limiting plate 4. The control circuit board 22 is provided with wires. The wires first pass through the wire hole 44 on the limiting plate 4 and are fixed to the binding rod 43 by cable tie (or other fasteners). Then, the wires corresponding to the limiting plate 4 and the outlet hole 13 are wound into a spiral buffer section (not shown in the figure). Finally, the wires pass out of the outlet hole 13 and are fixed to the second binding rod 131 of the outlet hole 13.

[0042] The second embodiment differs from the first embodiment in that: see [link to first embodiment]. Figures 8 to 12 As shown, the limiting plate 4 is disposed on the front end of the fan drive motor 2, and the rotating shaft 21 passes through the center of the limiting plate 4; the rear end 211 of the rotating shaft is rotatably engaged with the output head 56 of the crank arm 5, the locking screw 51 is connected to the rear end 211 of the rotating shaft, and the soft washer 53 is sleeved on the outside of the rotating shaft 21.

[0043] A bushing 23 is also fitted over the rotating shaft 21. The bushing 23 is located between the rear end of the housing of the fan drive motor 2 and the soft washer 53.

[0044] The control circuit board 22 is located at the front end of the housing of the fan drive motor 2 and behind the limiting plate 4.

Claims

1. A low-noise 360-degree oscillating fan, comprising a fan assembly, a frame (1), and an oscillating drive mechanism, wherein the fan assembly is provided with a rotating shaft (21) for connecting to the fan blades, and the oscillating drive mechanism includes an oscillating drive motor (3) and a curved arm (5), the oscillating drive motor (3) being mounted on the frame (1), and the curved arm (5) including a coupling head (54) and an output head (56), wherein the central axis of the coupling head (54) and the central axis of the output head (56) form a certain angle, the coupling head (54) being drivenly connected to the output shaft (31) of the oscillating drive motor (3), and the output head (56) being coaxially arranged with the central axis of the rotating shaft (21) and rotating in relation to the fan assembly; characterized in that: The output shaft (31) is axially limited to the coupling head (54), and the output head (56) is axially limited to the fan assembly. A soft washer (53) is also provided between the opposite surfaces of the output head (56) and the fan assembly. The soft washer (53) eliminates the axial gap between the output head (56) and the fan assembly.

2. The low-noise 360-degree oscillating fan according to claim 1, characterized in that: The output shaft (31) of the oscillating drive motor (3) is provided with a transverse hole (32), and the coupling head (54) of the crank arm (5) is provided with a relief groove (55) corresponding to the transverse hole (32). A transverse pin (52) is provided in the relief groove (55), and the transverse pin (52) is inserted into the transverse hole (32) to form an axial limiting fit.

3. The low-noise 360-degree oscillating fan according to claim 2, characterized in that: The side wall of the output shaft (31) is provided with a cut surface, which leads to the outer end of the output shaft (31); the transverse hole (32) is provided on the cut surface and radially penetrates the output shaft (31); the inner end of the output shaft (31) corresponding to the cut surface is provided with a limiting step (33); the coupling head (54) of the crank arm (5) is sleeved with the output shaft (31), and the end face of the crank arm (5) abuts against the limiting step (33).

4. The low-noise 360-degree oscillating fan according to claim 1, characterized in that: A locking screw (51) is also provided between the output head (56) of the crank arm (5) and the fan assembly. The locking screw (51) is installed from the side of the output head (56) of the crank arm (5) facing away from the fan assembly and passes through the output head (56) to connect with the fan assembly. The soft washer (53) is an O-ring silicone ring or an O-ring rubber ring.

5. The low-noise 360-degree oscillating fan according to claim 4, characterized in that: The fan assembly includes a fan drive motor (2), the fan drive motor (2) is provided with the rotating shaft (21), and the housing of the fan drive motor (2) is engaged with the frame (1) through an anti-rotation limiting component; the output head (56) of the crank arm (5) is connected to the anti-rotation limiting component or the rotating shaft (21).

6. The low-noise 360-degree oscillating fan according to claim 5, characterized in that: The anti-rotation limiting component includes a limiting hole (41) and a limiting rod (6). The outer diameter of the limiting rod (6) is smaller than the inner diameter of the limiting hole (41). The limiting rod (6) extends into the limiting hole (41). When the fan assembly shakes, the limiting rod (6) rotates relative to the limiting hole (41). The limiting hole (41) and the limiting rod (6) are respectively set on the fan blade drive motor (2) and the frame (1).

7. The low-noise 360-degree oscillating fan according to claim 6, characterized in that: The fan assembly also includes a limiting plate (4), which is disposed on the fan blade drive motor (2), and a limiting hole (41) located on the fan blade drive motor (2) is disposed on the limiting plate (4).

8. The low-noise 360-degree oscillating fan according to claim 7, characterized in that: The limiting plate (4) is located on the rear end of the fan drive motor (2). The limiting plate (4) is provided with a shaft head (42) on the central axis of the rotating shaft (21) and the output head (56) of the crank arm (5) is rotatably engaged with the shaft head (42). The locking screw (51) is connected to the rear end of the shaft head (42), and the soft washer (53) is sleeved on the outside of the shaft head (42).

9. The low-noise 360-degree oscillating fan according to claim 7, characterized in that: The limiting plate (4) is set on the front end of the fan drive motor (2), and the rotating shaft (21) passes through the center of the limiting plate (4); the rear end (211) of the rotating shaft is rotatably engaged with the output head (56) of the crank arm (5), the locking screw (51) is connected to the rear end (211) of the rotating shaft, and the soft washer (53) is sleeved on the outside of the rotating shaft (21).

10. The low-noise 360-degree oscillating fan according to claim 9, characterized in that: The rotating shaft (21) is also fitted with a bushing (23), which is located between the rear end of the housing of the fan drive motor (2) and the soft washer (53).

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