Up-down swinging mechanism of electric fan

Abstract

The utility model relates to the technical field of household fans, in particular to an electric fan up-down swinging mechanism which comprises a fan head and a fixing support, a swinging assembly is arranged between the fan head and the fixing support and comprises a rotating shaft pipe arranged on the fan head, and the rotating shaft pipe is in running fit with the fixing support. The fan head comprises an air outlet cover and an air inlet cover, a driving motor electrically connected to the control system is arranged on the air inlet cover, a fan impeller is arranged on an output shaft of the driving motor, a protective shell is arranged on the air inlet cover, and the driving motor is covered with the protective shell. The rotating shaft pipe penetrates through the axis of the protective shell and communicates with the interior of the protective shell. The air inlet cover has the effect of increasing the air inlet area of the air inlet cover.

Description

Technical Field

[0001] This application relates to the technical field of household fans, and particularly to a vertical swing mechanism of an electric fan. Background Art

[0002] An electric fan, also simply called a fan or a blower fan, is a household appliance that uses an electric motor to drive the fan blades to rotate to accelerate the circulation of air. The fan mainly consists of components such as a fan head, blades, a grille, and a control device, and the swing mechanism is the main component that enables the electric fan to swing.

[0003] Chinese Patent No. CN114857058B discloses an intelligent mobile bladeless fan, which includes a column, a machine head, and an air outlet frame. The machine head includes a rear shell, an upper air duct, a lower air duct, a motor, and a wind wheel. An air outlet ring is provided on the front of the air outlet frame, and a vertical swing mechanism is provided between the machine head and the column. The machine head is installed at the top of the column, and the vertical swing mechanism is located inside the rear shell.

[0004] In the above technology, since the vertical swing mechanism is located inside the rear shell and below the motor, and the main function of the rear shell is to protect the motor, it is necessary to make the rear shell have a large space to accommodate both the vertical swing mechanism and the motor at the same time. This will cause the volume of the rear shell to increase, thereby occupying the air intake area on the machine head and deteriorating the air outlet effect of the fan, which has deficiencies. Summary of the Utility Model

[0005] In order to improve the problem that the rear shell occupies the air intake area of the machine head, this application provides a vertical swing mechanism of an electric fan.

[0006] The vertical swing mechanism of an electric fan provided by this application adopts the following technical solution:

[0007] A vertical swing mechanism of an electric fan includes a fan head and a fixed bracket. A swing assembly is provided between the fan head and the fixed bracket. The swing assembly includes a rotating shaft tube provided on the fan head. The rotating shaft tube is rotationally matched with the fixed bracket, and a rotating member for driving the rotating shaft tube to rotate around the fixed bracket is provided inside the rotating shaft tube.

[0008] By adopting the above technical solution, the rotating member drives the rotating shaft tube to rotate around the fixed bracket, so that the fan head rotates around the rotation center on the fixed bracket. Since the rotating member is provided inside the rotating shaft tube, the air intake space occupied on the axis of the rotating shaft tube is reduced, thereby increasing the air intake area of the fan head, and further improving the air outlet effect of the fan.

[0009] Optionally, the fan head includes an air outlet cover and an air inlet cover. A drive motor electrically connected to the control system is provided on the air inlet cover. A fan impeller is provided on the output shaft of the drive motor. A protective housing is provided on the air inlet cover. The protective housing covers the drive motor, and the rotating shaft tube passes through the axis of the protective housing.

[0010] By adopting the above technical solution, the protective housing only wraps the drive motor, reducing the occupation of the air inlet area of the air inlet cover by the protective housing. At the same time, the rotating shaft tube passes through the axis of the protective housing, further reducing the occupation of the air inlet area of the air inlet cover by the rotating shaft tube, which is beneficial to improving the air outlet effect of the fan.

[0011] Optionally, the fixed bracket includes a support column and a connecting arc rod. The connecting arc rod is provided on the support column. The cross-section of the connecting arc rod is C-shaped, and the two C-shaped ends of the connecting arc rod are respectively in rotational cooperation with the two ends of the rotating shaft tube.

[0012] By adopting the above technical solution, the C-shaped connecting arc rod increases the distance between the air inlet cover and the support column, thereby reducing the occupation of the air inlet space of the air inlet cover and further improving the air outlet effect of the fan.

[0013] Optionally, the rotating member includes a fixing plate provided on the rotating shaft tube. A swing motor electrically connected to the control system is provided on the fixing plate. A driving gear is coaxially provided on the output shaft of the swing motor. A driven gear coaxial with the rotating shaft tube is rotatably provided on the fixing plate. The driving gear meshes with the driven gear. A transmission rotating shaft is coaxially provided on the driven gear. The end of the transmission rotating shaft facing away from the driven gear is provided on the connecting arc rod.

[0014] By adopting the above technical solution, when the control system starts the swing motor, the output shaft of the swing motor drives the driving gear to rotate. The driving gear drives the driven gear to rotate. The driven gear transmits the torque to the connecting arc rod through the transmission rotating shaft. The reaction force of the driven gear causes the fixing plate to drive the rotating shaft tube to rotate around the axis of the transmission rotating shaft, thereby realizing the swing of the fan head.

[0015] Optionally, a notch is provided on the driven gear.

[0016] By adopting the above technical solution, the swing motor is a forward and reverse motor, and the notch reduces the possibility of damage to the fan head caused by the accidental one-way continuous rotation of the driven gear by the driving gear.

[0017] Optionally, a shaft sleeve is provided on the rotating shaft tube, and the shaft sleeve is rotatably sleeved on the transmission rotating shaft.

[0018] By adopting the above technical solution, the frictional loss between the rotating shaft tube and the transmission rotating shaft is reduced, which is beneficial to extending the service life of the rotating shaft tube.

[0019] Optionally, the axes of the driving gear, the driven gear, and the rotating shaft tube are in the same plane.

[0020] By adopting the above technical solution, the occupation of the air inlet space on the air inlet cover is further reduced, which is beneficial to increasing the air inlet area of the air inlet cover and improving the air outlet effect of the fan.

[0021] Optionally, the rotating shaft tube communicates with the inside of the protective housing and the diameter of the rotating shaft tube is smaller than the diameter of the protective housing.

[0022] By adopting the above technical solution, on the premise of ensuring the function of threading the rotating shaft tube, the occupation of the air inlet space on the air inlet cover by the rotating shaft tube is reduced.

[0023] In summary, the present application includes at least one of the following beneficial technical effects:

[0024] 1. The rotating member drives the rotating shaft tube to rotate around the fixed bracket, so that the fan head rotates around the rotation center on the fixed bracket. Since the rotating member is arranged inside the rotating shaft tube, the occupied air inlet space on the axis of the rotating shaft tube is reduced, thereby increasing the air inlet area of the fan head, and further improving the air outlet effect of the fan;

[0025] 2. The C-shaped connecting arc rod increases the distance between the air inlet cover and the support column, thereby reducing the occupation of the air inlet space of the air inlet cover and further improving the air outlet effect of the fan;

[0026] 3. The control system starts the swing head motor, the output shaft of the swing head motor drives the driving gear to rotate, the driving gear drives the driven gear to rotate, the driven gear transmits the torque to the connecting arc rod through the transmission rotating shaft, and the reaction force of the driven gear causes the fixing plate to drive the rotating shaft tube to rotate around the axis of the transmission rotating shaft, thereby realizing the swing of the fan head;

[0027] 4. The occupation of the air inlet space on the air inlet cover is further reduced, which is beneficial to increasing the air inlet area of the air inlet cover and improving the air outlet effect of the fan. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 is a schematic structural diagram of an embodiment of the present application.

[0029] Figure 2 is a schematic structural diagram of the positional relationship between the swing head motor, the drive motor, and the driving gear in an embodiment of the present application.

[0030] Figure 3 is an exploded view of the body swing head assembly in an embodiment of the present application.

[0031] Description of reference numerals: 1. Fan head; 11. Air outlet cover; 12. Air inlet cover; 13. Driving motor; 14. Fan impeller; 15. Protective shell; 2. Fixed bracket; 21. Support column; 22. Connecting arc bar; 3. Oscillating assembly; 31. Rotating shaft tube; 32. Rotating member; 321. Fixed plate; 322. Oscillating motor; 323. Driving gear; 324. Driven gear; 325. Transmission rotating shaft; 4. Notch; 5. Shaft sleeve; 6. End plate. Detailed implementation manners

[0032] The following further elaborates on this application in conjunction with Figures 1 - 3 drawings.

[0033] An embodiment of this application discloses an up-and-down oscillating mechanism for an electric fan.

[0034] Referring to Figure 1 , an up-and-down oscillating mechanism for an electric fan includes a fixed bracket 2 and a fan head 1. An oscillating assembly 3 is arranged between the fan head 1 and the fixed bracket 2. The fixed bracket 2 includes a support column 21 and a connecting arc bar 22. The connecting arc bar 22 is bolted to the support column 21, and the cross-section of the connecting arc bar 22 is C-shaped.

[0035] Referring to Figure 1 , Figure 2 and Figure 3 , the fan head 1 includes an air outlet cover 11 and an air inlet cover 12. The cross-section of the air inlet cover 12 is conical. A driving motor 13 electrically connected to a control system is bolted to the air inlet cover 12. A fan impeller 14 is arranged on the output shaft of the driving motor 13. A protective shell 15 is welded to the air inlet cover 12, and the protective shell 15 covers the driving motor 13.

[0036] The C-shaped connecting arc bar 22 increases the distance between the air inlet cover 12 and the support column 21, thereby reducing the occupation of the air inlet space of the air inlet cover 12.

[0037] Referring to Figure 1 , Figure 2 and Figure 3 , the oscillating assembly 3 includes a rotating shaft tube 31 arranged on the fan head 1. An end plate 6 is bolted to the side of the rotating shaft tube 31 facing the air outlet cover 11. The rotating shaft tube 31 is arranged on the axis of the protective shell 15. The rotating shaft tube 31 communicates with the inside of the protective shell 15 and the diameter of the rotating shaft tube 31 is smaller than the diameter of the protective shell 15. The two C-shaped ends of the connecting arc bar 22 are respectively in rotational cooperation with the two ends of the rotating shaft tube 31. The rotating shaft tube 31 is in rotational cooperation with the fixed bracket 2. A rotating member 32 for driving the rotating shaft tube 31 to rotate around the fixed bracket 2 is arranged inside the rotating shaft tube 31.

[0038] Referring to Figure 1 , Figure 2 and Figure 3, the rotating member 32 includes a fixing plate 321 welded to the rotating shaft tube 31. A swing head motor 322 electrically connected to the control system is bolted to the fixing plate 321. A driving gear 323 is coaxially welded to the output shaft of the swing head motor 322. A driven gear 324 coaxial with the rotating shaft tube 31 is rotatably connected to the fixing plate 321. A notch 4 is formed on the driven gear 324, and the driving gear 323 meshes with the driven gear 324.

[0039] Referring to Figure 1 , Figure 2 and Figure 3 , a transmission rotating shaft 325 is coaxially and fixedly connected to the driven gear 324. A shaft sleeve 5 is clamped on the rotating shaft tube 31. The shaft sleeve 5 is coaxially rotatably sleeved on the transmission rotating shaft 325. One end of the transmission rotating shaft 325 facing away from the driven gear 324 is bolted to the connecting arc rod 22. The axes of the driving gear 323, the driven gear 324, and the rotating shaft tube 31 are in the same plane, further reducing the occupation of the air inlet space on the air inlet hood 12 and being beneficial to increasing the air inlet area of the air inlet hood 12.

[0040] When the control system starts the swing head motor 322, the output shaft of the swing head motor 322 drives the driving gear 323 to rotate. The driving gear 323 drives the driven gear 324 to rotate. The driven gear 324 transmits the torque to the connecting arc rod 22 through the transmission rotating shaft 325. Since the connecting arc rod 22 is fixed on the support column 21, the reaction force of the driven gear 324 causes the fixing plate 321 to drive the rotating shaft tube 31 to rotate around the axis of the transmission rotating shaft 325. The rotating shaft tube 31 drives the air inlet hood 12 to rotate synchronously, so as to realize the swing of the fan head 1.

[0041] The implementation principle of the up-and-down swing mechanism of the electric fan in the embodiment of the present application is as follows: When the control system starts the swing head motor 322, the output shaft of the swing head motor 322 drives the driving gear 323 to rotate. The driving gear 323 drives the driven gear 324 to rotate. The driven gear 324 transmits the torque to the connecting arc rod 22 through the transmission rotating shaft 325. Since the connecting arc rod 22 is fixed on the support column 21, the reaction force of the driven gear 324 causes the fixing plate 321 to drive the rotating shaft tube 31 to rotate around the axis of the transmission rotating shaft 325. The rotating shaft tube 31 drives the air inlet hood 12 to rotate synchronously, so as to realize the swing of the fan head 1.

[0042] The C-shaped connecting arc rod 22 increases the distance between the air inlet hood 12 and the support column 21, thus reducing the occupation of the air inlet space of the air inlet hood 12. The axes of the driving gear 323, the driven gear 324, and the rotating shaft tube 31 are in the same plane, further reducing the occupation of the air inlet space on the air inlet hood 12 and being beneficial to increasing the air inlet area of the air inlet hood 12.

[0043] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereby. Therefore, all equivalent changes made according to the structure, shape, and principle of the present application shall be covered within the protection scope of the present application.

Claims

1. An electric fan head up and down swing mechanism, comprising a fan head (1) and a fixing bracket (2), characterized in that: A swing head assembly (3) is arranged between the fan head (1) and the fixed bracket (2), and the swing head assembly (3) comprises a rotating shaft tube (31) arranged on the fan head (1), the rotating shaft tube (31) and the fixed bracket (2) are rotatably matched, and a rotating part (32) is arranged inside the rotating shaft tube (31) for driving the rotating shaft tube (31) to rotate around the fixed bracket (2).

2. The electric fan head up and down swing mechanism according to claim 1, characterized in that: The fan head (1) comprises an air outlet cover (11) and an air inlet cover (12); a driving motor (13) electrically connected to a control system is arranged on the air inlet cover (12); a fan impeller (14) is arranged on the output shaft of the driving motor (13); a protective shell (15) is arranged on the air inlet cover (12); the protective shell (15) covers the driving motor (13); and the rotating shaft tube (31) is passed through the axis of the protective shell (15).

3. The electric fan head up and down swing mechanism according to claim 2, characterized in that: The fixed bracket (2) comprises a support column (21) and a connecting arc rod (22), wherein the connecting arc rod (22) is arranged on the support column (21), the cross section of the connecting arc rod (22) is C-shaped, and the two ends of the C-shape of the connecting arc rod (22) are respectively rotatably matched with the two ends of the rotating shaft tube (31).

4. The electric fan head up and down swing mechanism according to claim 3, characterized in that: The rotating member (32) comprises a fixed plate (321) arranged on the rotating shaft tube (31); a swing head motor (322) electrically connected to a control system is arranged on the fixed plate (321); a driving gear (323) is coaxially arranged on the output shaft of the swing head motor (322); a driven gear (324) coaxial with the rotating shaft tube (31) is rotatably arranged on the fixed plate (321); the driving gear (323) meshes with the driven gear (324); a transmission shaft (325) is coaxially arranged on the driven gear (324); and one end of the transmission shaft (325) facing away from the driven gear (324) is arranged on the connecting arc rod (22).

5. The electric fan head up and down swing mechanism according to claim 4, characterized in that: The driven gear (324) is provided with a notch (4).

6. The electric fan head up and down swing mechanism according to claim 4, characterized in that: The rotating shaft tube (31) is provided with a shaft sleeve (5), and the shaft sleeve (5) is rotatably sleeved on the transmission rotating shaft (325).

7. The electric fan head up and down swing mechanism according to claim 4, characterized in that: The axis of the driving gear (323), the axis of the driven gear (324) and the axis of the rotating shaft tube (31) are in the same plane.

8. The electric fan head up and down swing mechanism according to claim 2, characterized in that: The rotating shaft tube (31) is communicated with the interior of the protective shell (15), and the diameter of the rotating shaft tube (31) is smaller than the diameter of the protective shell (15).

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