Oscillating structure of floor fan

Abstract

The utility model discloses a floor fan head shaking structure which comprises a fan head assembly, a U-shaped supporting frame assembly, an up-down head shaking driving mechanism and a left-right head shaking driving mechanism, the fan head assembly is matched with the supporting frame assembly in a rotating mode, the up-down head shaking driving mechanism is arranged in the fan head assembly, and a hollow shaft is arranged at the bottom of the supporting frame assembly. The left-right head shaking driving mechanism is arranged in the bottom of the supporting frame assembly and is in transmission connection with the hollow shaft, the up-down head shaking driving mechanism comprises an up-down head shaking driving motor, a gear box, a gear transmission pair and a damping torsional spring, the gear box is connected with the fan head assembly, and the gear transmission pair is arranged in the gear box; the power input end and the power output end of the gear transmission pair are in transmission connection with the up-down oscillating driving motor and the supporting frame assembly respectively, and the damping torsional spring is arranged between the power output end and the gear box and enables the damping torsional spring to be tightened and released separately when the fan head assembly moves downwards and upwards. The up-and-down oscillating driving motor with the structure is balanced in stress and long in service life.

Description

Technical Field

[0001] The utility model relates to a floor fan, in particular to a shaking head structure of a floor fan. Background Art

[0002] China Patent Publication No. CN107120298A disclosed a drive assembly of an oscillating fan on September 1, 2017, including an up-and-down oscillating drive mechanism and a left-and-right oscillating drive mechanism; the first drive gear of the up-and-down oscillating drive mechanism is sleeved on the power output shaft of the first drive motor, the first drive gear is meshed with the first transmission gear, and the first transmission gear is vertical; the first drive motor is fixed to the first frame, and the first frame is fixedly connected to the fan blade drive structure; the second drive gear of the left-and-right oscillating drive mechanism is sleeved on the power output shaft of the second drive motor, the second drive gear is meshed with the second transmission gear, the second transmission gear is horizontal, and is fixed on the column of the oscillating fan, and the second drive motor is fixed on the second frame; the first frame and the second frame are rotatably connected. When the fan of this structure shakes its head downward, the fan head itself generates a certain gravity acceleration, and when the fan shakes its head upward, the fan head moves against gravity, so when the motor output power remains unchanged, when the fan head shakes its head downward to a low position, a sudden acceleration phenomenon obviously occurs, and when the fan head shakes its head upward to a high position, a sudden deceleration phenomenon obviously occurs; resulting in a decrease in the service life of the up-and-down oscillating drive mechanism. Utility Model Content

[0003] The utility model aims to provide a floor fan shaking structure with simple and reasonable structure, balanced force on the up and down shaking driving motor and long service life.

[0004] The purpose of the utility model is achieved in this way:

[0005] A floor fan shaking structure includes a fan head assembly, a support frame assembly, an up and down shaking drive mechanism and a left and right shaking drive mechanism. The support frame assembly is U-shaped, and the fan head assembly rotates and cooperates with the U-shaped opening of the support frame assembly. The up and down shaking drive mechanism is arranged in the fan head assembly, and a hollow shaft is provided at the bottom of the support frame assembly. The left and right shaking drive mechanism is arranged in the bottom of the support frame assembly and is connected to the hollow shaft. The up and down shaking drive mechanism includes an up and down shaking drive motor, a gear box, a gear transmission pair and a damping torsion spring. The gear box is connected to the fan head assembly, and the gear transmission pair is arranged in the gear box. The power input end and the power output end of the gear transmission pair are respectively connected to the up and down shaking drive motor and the support frame assembly. The damping torsion spring is arranged between the power output end and the gear box, and the damping torsion spring is tightened and released respectively when the fan head assembly moves downward and upward.

[0006] The purpose of the utility model can also be solved by the following technical measures:

[0007] As a more specific solution, the gear box includes a support plate and a gear box cover, the support plate is a sheet metal part and is connected to the fan head assembly, and the up and down shaking drive motor is arranged on the gear box cover; the gear transmission pair is arranged between the support plate and the gear box cover, and the gear transmission pair includes an up and down shaking drive gear and an up and down shaking control gear that are meshed with each other, and the up and down shaking drive gear and the up and down shaking control gear respectively form the power input end and the power output end, and the up and down shaking control gear is provided with a central shaft, and the two ends of the central shaft are respectively located outside the two ends of the up and down shaking control gear, and one end of the central shaft passes through the support plate and is transmission-connected with the support frame assembly, and the damping torsion spring sleeve is arranged outside the other end of the central shaft, and the two ends of the damping torsion spring sleeve are respectively provided with positioning feet, and the two positioning feet are respectively connected to the up and down shaking control gear and the gear box cover.

[0008] As a further solution, the fan head assembly includes a head rear cover, a fan blade drive motor, a head front cover, fan blades and a mesh cover. The fan blade drive motor and the up and down shaking drive mechanism are arranged in the head rear cover. Axial holes are provided on both sides of the head rear cover. A first shaft sleeve and a second shaft sleeve are respectively provided in the two shaft holes. The center shaft passes through the first shaft sleeve, and a support shaft is provided in the second shaft sleeve.

[0009] As a further solution, the support frame assembly includes a U-shaped support frame, a support frame shell and a U-shaped reinforcement plate, and the two sides of the open end of the U-shaped support frame are respectively connected to the central axis and the support axis; the U-shaped reinforcement plate is formed by bending a sheet metal and is arranged on the outside of the U-shaped support frame, and a plurality of reinforcing ribs are provided on the surface of the sheet metal, and steps are bent at the corners on both sides of the lower part of the U-shaped reinforcement plate; the support frame shell is arranged on the outside of the U-shaped support frame and the U-shaped reinforcement plate.

[0010] As a further solution, the left and right shaking drive mechanism includes left and right shaking drive motors, a support plate, and left and right shaking drive gears and left and right shaking control gears that mesh with each other. The lower end of the hollow shaft extends out of the bottom of the support frame assembly, the middle part of the hollow shaft is connected to the left and right shaking control gears, and the upper end of the hollow shaft is rotatably matched with the support plate through an upper bearing. The support plate is fixedly set on the support frame assembly, and the left and right shaking drive motors are set on the support plate and are transmission-connected to the left and right shaking drive gears.

[0011] As a further solution, a circuit board is further provided in the fan head assembly, and the circuit board is arranged on the up and down shaking drive mechanism, and a threading channel is formed in the hollow shaft.

[0012] As a further solution, an external power input electrode or a control signal terminal electrode is provided on the circuit board, and the external power input electrode or the control signal terminal electrode leads to the surface of the rear cover of the machine head.

[0013] As a further solution, a hook is further provided on the rear end face of the rear cover of the machine head; an external mobile power supply or a function expansion head is further included. The external mobile power supply or the function expansion head is provided with a buckle position that is engaged with the hook, and a contact is provided on the surface of the external mobile power supply or the function expansion head corresponding to the external power input electrode or the control signal terminal electrode.

[0014] The beneficial effects of the present utility model are as follows:

[0015] (1) When the present utility model shakes its head downward, the damping torsion spring is tightened to store energy, offsetting the gravitational acceleration of the fan head assembly, so that it shakes its head downward evenly; when shaking its head upward, the damping torsion spring releases elastic force, making up for the anti-gravity work of the fan head assembly, avoiding increasing the load on the up and down shaking drive motor, protecting the motor and extending its service life.

[0016] (2) The up and down shaking drive mechanism of the present utility model is arranged inside the fan head assembly, and the left and right shaking drive mechanism is arranged inside the bottom of the support frame assembly. Moreover, a U-shaped reinforcement plate is arranged inside the support frame assembly, making the shapes on both sides of the support frame assembly thinner and lighter.

[0017] (3) The hollow shaft of the present utility model is supported by upper and lower bearings, with stronger load-bearing capacity and smoother rotation. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic exploded view of an embodiment of the present utility model.

[0019] Figure 2 is Figure 1 a schematic enlarged view of some parts in

[0020] Figure 3 is a schematic enlarged view of the present utility model from another angle.

[0021] Figure 4 is Figure 3 a schematic enlarged view of some parts in

[0022] Figure 5 is a schematic exploded view of the fan head assembly and the external function expansion device in the present utility model.

[0023] Figure 6 is a schematic exploded view of the external function expansion device in the present utility model.

[0024] Figure 7 is Figure 5 a schematic rear view structure diagram after assembly.

[0025] Figure 8 is Figure 7 a schematic A-A sectional view structure diagram of

[0026] In the figure: 1 is the fan head assembly, 11 is the rear cover of the machine head, 111 is the hook, 112 is the electrode, 12 is the fan blade driving motor, 13 is the front cover of the machine head, 14 is the rear wire guard, 15 is the wire guard locking nut, 16 is the fan blade, 17 is the fan blade locking nut, 18 is the front wire guard;

[0027] 2 is the up-and-down swing drive mechanism, 21 is the support plate, 22 is the up-and-down swing control gear, 221 is the central shaft, 23 is the up-and-down swing drive gear, 24 is the damping torsion spring, 25 is the gearbox cover, 26 is the circuit board, 27 is the up-and-down swing drive motor;

[0028] 3 is the support frame assembly, 31 is the U-shaped support frame, 32 is the outer side plate of the support frame, 33 is the U-shaped reinforcement plate, 34 is the bottom cover of the support frame, 35 is the first bushing, 36 is the second bushing, 37 is the support shaft;

[0029] 4 is the left-and-right swing drive mechanism, 41 is the left-and-right swing drive motor, 42 is the shaft cover, 43 is the bearing plate, 44 is the upper bearing, 45 is the left-and-right swing drive gear, 46 is the left-and-right swing control gear, 47 is the lower bearing;

[0030] 5 is the hollow shaft, 51 is the wire threading channel;

[0031] 6 is the external function expansion device, 61 is the snap position. Specific embodiments

[0032] The present utility model will be further described below in conjunction with the accompanying drawings and embodiments:

[0033] See Figures 1 to 8 As shown, a floor fan swing structure includes a fan head assembly 1, a support frame assembly 3, an up-and-down swing drive mechanism 2, and a left-and-right swing drive mechanism 4. The support frame assembly 3 is U-shaped. The fan head assembly 1 is rotationally matched with the U-shaped opening of the support frame assembly 3. The up-and-down swing drive mechanism 2 is arranged inside the fan head assembly 1. A hollow shaft 5 is provided at the bottom of the support frame assembly 3. The left-and-right swing drive mechanism 4 is arranged inside the bottom of the support frame assembly 3 and is in transmission connection with the hollow shaft 5. The up-and-down swing drive mechanism 2 includes an up-and-down swing drive motor 27, a gearbox, a gear transmission pair, and a damping torsion spring 24. The gearbox is connected to the fan head assembly 1. The gear transmission pair is arranged inside the gearbox. The power input end and the power output end of the gear transmission pair are respectively in transmission connection with the up-and-down swing drive motor 27 and the support frame assembly 3. The damping torsion spring 24 is arranged between the power output end and the gearbox, and when the fan head assembly 1 moves downward and upward, the damping torsion spring 24 is respectively tightened and released.

[0034] The gear box includes a support plate 21 and a gear box cover 25. The support plate 21 is a sheet metal part and is connected to the fan head assembly 1. The up and down shaking drive motor 27 is arranged on the gear box cover 25; the gear transmission pair is arranged between the support plate 21 and the gear box cover 25, and the gear transmission pair includes an up and down shaking drive gear 23 and an up and down shaking control gear 22 that are meshed with each other. The up and down shaking drive gear 23 and the up and down shaking control gear 22 respectively form the power input end and the power output end. The up and down shaking control gear 22 is provided with a central shaft 221. The two ends of the central shaft 221 are respectively located outside the two ends of the up and down shaking control gear 22. One end of the central shaft 221 passes through the support plate 21 and is transmission-connected with the support frame assembly 3. The damping torsion spring 24 is sleeved outside the other end of the central shaft 221. The two ends of the damping torsion spring 24 sleeve are respectively provided with positioning feet, and the two positioning feet are respectively connected to the up and down shaking control gear 22 and the gear box cover 25.

[0035] The wheel diameter of the up and down shaking driving gear 23 is smaller than the wheel diameter of the up and down shaking control gear 22, so that the gear transmission pair plays a deceleration role.

[0036] The fan head assembly 1 includes a head rear cover 11, a fan blade drive motor 12, a head front cover 13, a fan blade 16 and a mesh cover. The fan blade drive motor 12 and the up and down shaking drive mechanism 2 are arranged in the head rear cover 11. The two sides of the head rear cover 11 are provided with shaft holes, and the two shaft holes are respectively provided with a first shaft sleeve 35 and a second shaft sleeve 36. The central shaft 221 passes through the first shaft sleeve 35, and a support shaft 37 is provided in the second shaft sleeve 36. The head front cover 13 is arranged at the front side of the head rear cover 11. The front end of the head front cover 13 is provided with a threaded sleeve. The rotating shaft of the fan blade drive motor 12 passes through the threaded sleeve and then extends out of the head front cover 13. The mesh cover includes a front mesh cover 18 and a rear mesh cover 14. The rear mesh cover 14 is arranged at the front end of the head front cover 13. The threaded sleeve passes through the rear mesh cover 14 and is connected to the mesh cover locking nut 16. The rear mesh cover 14 is fixed between the head front cover 13 and the mesh cover locking nut 16. The fan blade 16 is arranged on the rotating shaft, and a cross pin is provided on the rotating shaft to abut against the rear end of the fan blade 16. The front end of the rotating shaft extends out of the front end of the fan blade 16 and is connected to the fan blade locking nut 17. The front mesh cover 18 is arranged outside the fan blade 16 and is connected to the front end of the rear mesh cover 14.

[0037] The support frame assembly 3 includes a U-shaped support frame 31, a support frame shell and a U-shaped reinforcement plate 33. The two sides of the open end of the U-shaped support frame 31 are connected to the central axis 221 and the support axis 37 respectively; the U-shaped reinforcement plate 33 is formed by bending a sheet metal and is arranged on the outside of the U-shaped support frame 31. The surface of the sheet metal is provided with a plurality of reinforcing ribs. The lower corners of the U-shaped reinforcement plate 33 are bent with steps; the support frame shell is arranged on the outside of the U-shaped support frame 31 and the U-shaped reinforcement plate 33. The support frame shell includes a support frame outer plate 32 and a support frame bottom cover 34. The support frame outer plate 32 is arranged outside the left and right sides of the U-shaped support frame 31, and the support frame bottom cover 34 is arranged at the bottom of the U-shaped support frame 31. The support frame bottom cover 34 is Y-shaped, and the hollow shaft 5 is arranged in the middle of the bottom surface of the support frame bottom cover 34. A lower bearing 47 is also arranged between the hollow shaft 5 and the support frame bottom cover 34.

[0038] The left and right shaking mechanism includes a left and right shaking drive motor 41, a support plate 43, and a left and right shaking drive gear 45 and a left and right shaking control gear 46 that mesh with each other. The lower end of the hollow shaft 5 extends out of the bottom of the support frame assembly 3, the middle part of the hollow shaft 5 is connected to the left and right shaking control gear 46, and the upper end of the hollow shaft 5 is rotatably matched with the support plate 43 through the upper bearing 44 (the support plate 43 is provided with a step hole corresponding to the upper end of the hollow shaft 5, the upper bearing is a ball bearing, the outer ring of the upper bearing is supported on the step surface of the step hole, and the top surface of the hollow shaft 5 is provided with a shaft cover 42, and the edge of the shaft cover 42 is against the inner ring of the upper bearing 44), the support plate 43 is fixedly arranged on the support frame assembly 3, and the left and right shaking drive motor 41 is arranged on the support plate 43 and is connected to the left and right shaking drive gear 45. The wheel diameter of the left and right shaking drive gear 45 is smaller than the wheel diameter of the left and right shaking control gear 46, and the gear teeth distribution on the outer periphery of the left and right shaking control gear 46 is less than 270 degrees.

[0039] The fan head assembly 1 is further provided with a circuit board 26 , which is arranged on the up and down shaking drive mechanism 2 , and a threading channel 51 is formed in the hollow shaft 5 .

[0040] The circuit board 26 is provided with an external power input electrode 112 or a control signal terminal electrode 112 , and the external power input electrode 112 or the control signal terminal electrode 112 is connected to the surface of the head rear cover 11 .

[0041] The rear end surface of the head rear cover 11 is also provided with a hook 111; it also includes an external mobile power supply or a function expansion head (external function expansion device 6), the external mobile power supply or the function expansion head is provided with a buckle position 61 that cooperates with the hook 111, and the surface of the external mobile power supply or the function expansion head is provided with a contact corresponding to the external power input electrode 112 or the control signal terminal electrode 112.

[0042] The external function expansion device 6 is an external mobile power supply, or the function expansion head is a projection lamp or a negative ion generator, etc.

[0043] Its working principle is as follows: The up-and-down shaking drive motor 27 drives the up-and-down shaking control gear 22 to rotate through the up-and-down shaking drive gear 23. Since the support frame assembly 3 is finally connected to the fan base (i.e., the relative position with the ground is fixed), when the up-and-down shaking control gear 22 rotates, the fan head assembly 1 shakes up and down. When the fan head assembly 1 shakes downwards, the damping torsion spring 24 twists and stores energy. At the same time, under the condition that the work done by the up-and-down shaking drive motor 27 is constant, the damping torsion spring 24 offsets the gravitational acceleration of the fan head assembly 1, making it shake downwards at a uniform speed; when the fan head assembly 1 shakes upwards, the damping torsion spring 24 releases elastic force to make up for the anti-gravity work of the fan head assembly 1, avoiding increasing the load of the up-and-down shaking drive motor 27, so that the fan head assembly 1 shakes upwards at a uniform speed.

[0044] The left-and-right shaking drive motor 41 drives the left-and-right shaking control gear 46 to rotate through the left-and-right shaking drive gear 45. The left-and-right shaking control gear 46 drives the hollow shaft 5 to rotate. The lower end of the hollow shaft 5 extends out of the bottom of the support frame assembly 3 and is connected to the column of the fan base. Since the fan base is placed on the ground, when the left-and-right shaking control gear 46 rotates, the support frame assembly 3 and the fan head assembly 1 shake left and right.

[0045] The above is the preferred solution of the present invention, which shows and describes the basic principle, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A floor fan oscillating structure, comprising a fan head assembly, a support frame assembly, an up-and-down oscillating drive mechanism and a left-and-right oscillating drive mechanism. The support frame assembly is U-shaped. The fan head assembly is rotationally fitted with the U-shaped opening of the support frame assembly. The up-and-down oscillating drive mechanism is arranged inside the fan head assembly. A hollow shaft is provided at the bottom of the support frame assembly. The left-and-right oscillating drive mechanism is arranged inside the bottom of the support frame assembly and is in transmission connection with the hollow shaft, and is characterized in that: The up-and-down swing drive mechanism includes an up-and-down swing drive motor, a gear box, a gear transmission pair, and a damping torsion spring. The gear box is connected to the fan head assembly. The gear transmission pair is arranged inside the gear box. The power input end and the power output end of the gear transmission pair are respectively in transmission connection with the up-and-down swing drive motor and the support frame assembly. The damping torsion spring is arranged between the power output end and the gear box, and causes the damping torsion spring to be tightened and released respectively when the fan head assembly moves downward and upward.

2. The floor fan swing structure according to claim 1, characterized in that: The gear box includes a support plate and a gear box cover. The support plate is a sheet metal part and is connected to the fan head assembly. The up-and-down swing drive motor is arranged on the gear box cover. The gear transmission pair is arranged between the support plate and the gear box cover. The gear transmission pair includes an up-and-down swing drive gear and an up-and-down swing control gear that mesh with each other. The up-and-down swing drive gear and the up-and-down swing control gear respectively form the power input end and the power output end. The up-and-down swing control gear is provided with a central shaft. The two ends of the central shaft are respectively located outside the two ends of the up-and-down swing control gear. One end of the central shaft passes through the support plate and is in transmission connection with the support frame assembly. The damping torsion spring is sleeved outside the other end of the central shaft. The two ends of the damping torsion spring sleeve are respectively provided with positioning feet, and the two positioning feet are respectively connected to the up-and-down swing control gear and the gear box cover.

3. The floor fan head shaking structure according to claim 2, wherein: The fan head assembly includes a rear cover of the machine head, a fan blade drive motor, a front cover of the machine head, a fan blade, and a mesh cover. The fan blade drive motor and the up-and-down swing drive mechanism are arranged inside the rear cover of the machine head. The two sides of the rear cover of the machine head are provided with shaft holes. A first shaft sleeve and a second shaft sleeve are respectively arranged in the two shaft holes. The central shaft passes through the first shaft sleeve, and a support shaft is arranged in the second shaft sleeve.

4. The floor fan head shaking structure according to claim 3, characterized in that: The support frame assembly includes a U-shaped support frame, a support frame housing, and a U-shaped reinforcement plate. The two sides of the open end of the U-shaped support frame are respectively connected to the central shaft and the support shaft. The U-shaped reinforcement plate is formed by bending a sheet metal part and is arranged on the outside of the U-shaped support frame. A plurality of reinforcing ribs are arranged on the surface of the sheet metal part. Steps are bent at the two side corners of the lower part of the U-shaped reinforcement plate. The support frame housing is arranged on the outside of the U-shaped support frame and the U-shaped reinforcement plate.

5. The floor fan head shaking structure according to claim 3, characterized in that: The left-and-right swing drive mechanism includes a left-and-right swing drive motor, a bearing plate, and a left-and-right swing drive gear and a left-and-right swing control gear that mesh with each other. The lower end of the hollow shaft extends outside the bottom of the support frame assembly. The middle part of the hollow shaft is connected to the left-and-right swing control gear. The upper end of the hollow shaft is rotationally matched with the bearing plate through an upper bearing. The bearing plate is fixedly arranged on the support frame assembly. The left-and-right swing drive motor is arranged on the bearing plate and is in transmission connection with the left-and-right swing drive gear.

6. The swing structure of the floor fan according to claim 5, wherein: A circuit board is further arranged inside the fan head assembly. The circuit board is arranged on the up-and-down swing drive mechanism. A wire passing channel is formed inside the hollow shaft.

7. The floor fan shaking head structure according to claim 6, characterized in that: The circuit board is provided with an external power input electrode or a control signal terminal electrode, and the external power input electrode or the control signal terminal electrode leads to the surface of the rear cover of the machine head.

8. The floor fan head shaking structure according to claim 7, wherein: A hook is further arranged on the rear end face of the rear cover of the machine head. An external mobile power supply or a function expansion head is further included. The external mobile power supply or the function expansion head is provided with a buckle that is buckled and matched with the hook. Contacts corresponding to the external power input electrode or the control signal terminal electrode are arranged on the surface of the external mobile power supply or the function expansion head.

Images