CN207420930U - Electric fan - Google Patents

Abstract

The utility model provides an electric fan, include: the machine head comprises fan blades and a mesh enclosure; the head swinging support is of a hollow structure, one end of the head swinging support is connected with the machine head, and the head swinging support is positioned outside the mesh enclosure; the first driving device is arranged in the swing head bracket; first transmission, the setting is in the yaw support, including drive gear and driven gear, drive gear is connected with first drive arrangement, drive gear directly or indirectly cooperatees with driven gear, driven gear is connected with the aircraft nose, and drive the aircraft nose swing, electric fan during operation, first drive arrangement drive gear rotates, drive gear drives driven gear and rotates, finally, driven gear drives the aircraft nose and rotates, realize the up-and-down yaw motion of aircraft nose, the multi-angle, the three-dimensional air supply on a large scale, and simultaneously, first drive arrangement is not the head that sets up at the electric fan, the size of head has been reduced, the appearance of electric fan is more pleasing to the eye, and more steady, the function that has multistage gear speed governing simultaneously.

Description

electric fan

technical field

The utility model relates to the technical field of household appliances, in particular to an electric fan.

Background technique

At present, there are few related designs of 3D oscillating fans, which usually can only achieve side-to-side swinging air supply, and the air supply range is limited, which cannot improve user experience and satisfaction. The only 3D oscillating fans that appear on the market also have many shortcomings and deficiencies. For example, the head of the fan is relatively large, which is not beautiful, and makes the fan unstable when it works, and it is prone to tilt.

Utility model content

The utility model aims at at least solving one of the technical problems existing in the prior art or the related art.

Therefore, the first aspect of the present utility model is to provide an electric fan.

In view of this, according to the first aspect of the present utility model, an electric fan is provided, the electric fan includes: a head, the head includes fan blades, a fan motor and a net cover, the fan blades and the fan motor are located in the net cover, and The fan blade is connected with the fan motor; the swing head support, the swing head support is a hollow structure, one end of the swing head support is connected with the machine head, and the swing head support is located outside the net cover; the first drive device, the first drive device is set In the swing head bracket; transmission device, the transmission device is arranged in the swing head bracket, the transmission device includes a driving gear and a driven gear, the driving gear is connected with the first driving device, the driving gear and the driven gear are directly or indirectly matched, The driven gear is connected with the machine head and drives the machine head to swing.

The electric fan provided by the utility model comprises a machine head, a first driving device and a transmission device, wherein the machine head includes a fan blade, a fan motor and a net cover, the fan blade and the fan motor are located in the net cover, and the fan blade and the fan The motor is connected, the swing head support is a hollow structure, one end of the swing head support is connected with the machine head, and the swing head support is located outside the net cover, the first driving device is arranged in the swing head support, and the transmission device is arranged in the swing head support Inside, the transmission device includes a driving gear and a driven gear, the driving gear is connected with the first driving device, the driving gear and the driven gear cooperate directly or indirectly, the driven gear is connected with the machine head, and drives the machine head to swing, and the electric When the fan is working, the first driving device first drives the driving gear to rotate, and the driving gear drives the driven gear to rotate, and finally, the driven gear drives and rotates the machine head, realizing the up and down movement of the machine head and multi-angle air supply, realizing The large-scale three-dimensional air supply improves the user experience; at the same time, the device that drives the swing of the machine head is arranged outside the machine head, which reduces the size of the machine head, makes the appearance of the electric fan more beautiful, and makes the machine head During the swinging process, the electric fan is more stable, avoiding the problem that the head was too large in the past, which caused the head to swing unstable; by changing the transmission ratio of the gear, the frequency of the swing of the machine head is changed, which is convenient for users to adjust, making the electric fan more stable. Intelligent. The fan motor is located inside the net cover, which is different from the previous fan motor located behind the net cover. It does not make full use of the space in the net cover, and at the same time increases the overall size of the electric fan head. On the one hand, the solution of this application makes full use of On the other hand, the distance between the driven gear and the nose is made closer, and the torque of the swing head is reduced, thereby reducing the size and shape of the first driving device. Helps reduce costs.

In addition, according to the electric fan in the above technical solution provided by the utility model, it can also have the following additional technical features:

In the above technical solution, preferably, the transmission device further includes: at least one transmission gear, the transmission gear is disposed between the driving gear and the driven gear, and two adjacent transmission gears are matched or arranged coaxially.

In this technical solution, the transmission device also includes at least one transmission gear, the transmission gear is arranged between the driving gear and the driven gear, and two adjacent transmission gears are matched or coaxially arranged, and the transmission gear transmits power from the driving gear to the driven gear. At the same time, the driven gear plays the role of multi-stage speed regulation, which is convenient for adjusting the swing frequency of the machine head to meet the needs of users.

In any of the above technical solutions, preferably, the oscillating head bracket includes: a main body and a bent part forming an obtuse angle with the main body; wherein, the main body is connected to the bent part, the other end of the bent part is connected to the machine head, and the main body Set in the vertical direction.

In this technical solution, the oscillating head support includes a main body and a bent part forming an obtuse angle with the main body, wherein the main body is connected to the bent part, and the other end of the bent part is connected to the machine head, and the main body is arranged along the vertical direction , so that the size of the head of the electric fan is significantly reduced, and the center of gravity of the electric fan is located inside the swing head bracket, that is, the center of gravity of the electric fan moves down from the head of the electric fan, which avoids the previous top-heavy phenomenon, which causes the electric fan to shake its head. , The electric fan is unstable, and once it is subjected to a slight external force, it will fall over.

In any of the above technical solutions, preferably, the electric fan further includes: a fan motor bracket, one end of the fan motor bracket is connected to the driven gear, and the other end of the fan motor bracket is connected to the machine head. The fan motor is arranged on the fan motor bracket on the end facing the nose.

In this technical solution, the electric fan also includes a fan motor bracket, one end of the fan motor bracket is connected to the driven gear, the other end of the fan motor bracket is connected to the machine head, the fan motor is arranged on one end surface of the fan motor bracket, and The fan motor is located in the machine head, and the machine head is connected with the driven wheel through the fan motor bracket. Driven by the driven wheel, the machine head can rotate and supply air. The existence of the fan motor bracket makes the machine head not directly installed and connected with the driven wheel. It makes the machine head installed more stably and helps to keep the electric fan stable. The fan motor is set in the machine head to drive the fan blades to rotate at high speed and drive a large amount of air flow to form wind.

In any of the above technical solutions, preferably, the electric fan includes: a connecting shaft connected to the driven gear, and the axis of the connecting shaft is along the horizontal direction; the connecting shaft is inserted on the fan motor bracket, and connected to the fan The motor bracket is fixedly connected so that the fan motor bracket rotates in the vertical direction following the connection shaft.

In this technical solution, the electric fan includes a connecting shaft connected to the driven gear, and the axis of the connecting shaft is along the horizontal direction. The connecting shaft is inserted on the fan motor bracket and fixedly connected to the fan motor bracket. The motor bracket can rotate synchronously with the connecting shaft, thereby driving the machine head to rotate synchronously, making full use of the torque output by the driven gear, and the machine head rotates more smoothly.

In any of the above technical solutions, preferably, the fan motor support includes: a bottom plate and two side plates; wherein, the two side plates are respectively connected to both ends of the bottom plate, and the two side plates are arranged in parallel, and the rotating shaft passes through Two side plates are rotatably connected with the swing head bracket.

In this technical solution, the fan motor support includes a bottom plate and two side plates, wherein the two side plates are respectively connected to both ends of the bottom plate, and the two side plates are arranged in parallel, and the cross section of the fan motor support is U-shaped. The connecting shaft passes through the two parallel side walls of the fan motor bracket, and is connected to the swing head bracket in rotation. One end of the horizontal connecting shaft is fixedly connected to one side of the U-shaped bracket, and the other end is fixedly connected to the other side of the U-shaped bracket. The U-shaped bracket does not It is easy to deform and has good rigidity. At the same time, because the horizontal connection shaft is a shaft, the concentricity of the left and right sides is good and the rotation is smooth.

In any of the above technical solutions, preferably, the electric fan further includes: a net cover installation plate, the net cover installation plate is arranged on the side where the motor is provided on the fan motor bracket, the net cover is connected with the net cover installation plate, and the fan motor Located inside the grill so that the fan motor is inside the machine head.

In this technical solution, the electric fan also includes a net cover installation plate, wherein the net cover installation plate is arranged on the side where the motor is provided on the fan motor bracket, the net cover is connected with the net cover installation plate, and the fan motor is located in the net cover so that the fan motor is located in the machine head, the grille mounting plate provides installation space for both the fan motor and the grille, and the grille covers the fan motor to prevent dust from falling into the motor and affecting the normal operation of the fan motor .

In any of the above-mentioned technical solutions, preferably, the electric fan further includes: a fan motor bracket housing, which is located between the machine head and the swing head bracket, and is buckled on the side of the grill mounting plate facing the swing head bracket, and the fan The motor support housing covers the fan motor support.

In this technical solution, the electric fan also includes a fan motor bracket shell, which is located between the machine head and the swing head bracket, and is fastened on the side of the net cover mounting plate facing the swing head bracket, and the fan motor bracket shell covers The fan motor bracket plays the role of dust prevention and keeps the inside of the electric fan clean and tidy.

In any of the above technical solutions, preferably, the electric fan further includes: a second drive device, a second transmission device, and a column; wherein, the second drive device is arranged in the swing head bracket, and the second transmission device is arranged in the column, The second driving device cooperates with the second transmission device to make the swing head bracket and the machine head rotate in the horizontal direction relative to the column.

In this technical solution, the electric fan also includes a second driving device, a second transmission device and a column, wherein the second driving device is arranged in the swing head bracket, the second transmission device is arranged in the column, and the second driving device and the first The two transmission devices cooperate to make the swing head bracket and the machine head rotate in the horizontal direction relative to the column, and realize the left and right swing of the machine head. The wind improves the user experience and satisfaction.

In any of the above technical solutions, preferably, the electric fan further includes: a control device connected to the first drive device and the second drive device respectively.

In this technical solution, the electric fan also includes a control device, which is respectively connected with the first drive device and the second drive device, and controls the swing angle and the speed of the swing head up and down, left and right, etc. of the machine head respectively. , individually control the fan up and down, left and right, and adjust it according to your own needs, which improves the user experience and satisfaction.

To sum up, in the electric fan provided by the utility model, the up and down oscillating mechanism and the left and right oscillating mechanism are all installed in the shell of the oscillating head part. The utility model is equipped with two driving devices, which realize the air supply to the up and down, left and right directions of the machine head, and can also perform air supply up and down or left and right separately during work, and the air supply angle can be adjusted, so that the electric fan has Multi-angle, large-scale three-dimensional air supply. When the air is supplied at a large angle, it can be used as an air circulation fan. When there are few people, the air can be supplied at a small angle, and the wind force can be small, which can save power; the angle of shaking the head up and down and left and right can be adjusted The adjustment is realized by controlling the steering of the drive motor through the circuit.

Additional aspects and advantages of the invention will become apparent in the description which follows, or may be learned by practice of the invention.

Description of drawings

The above and/or additional aspects and advantages of the present utility model will become apparent and easy to understand from the description of the embodiments in conjunction with the following drawings, wherein:

Fig. 1 is the structural representation of electric fan in an embodiment of the utility model;

Fig. 2 is a sectional view of an electric fan in an embodiment of the present utility model;

Fig. 3 is another structural schematic diagram of the electric fan in an embodiment of the present invention.

Wherein, the corresponding relationship between reference numerals and component names in Fig. 1 to Fig. 3 is:

10 machine heads, 12 fan blades, 14 net covers, 16 fan motors, 20 swing head brackets, 202 fan motor brackets, 204 net cover installation plates, 206 fan motor bracket shells, 208 first drive devices, 210 second drive devices, 212 drive gears, 214 driven gears, 216 first transmission gears, 218 second transmission gears, 220 third transmission gears, 222 connecting shafts, 224 bearings, 30 columns.

Detailed ways

In order to more clearly understand the above purpose, features and advantages of the utility model, the utility model will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that, in the case of no conflict, the embodiments of the present application and the features in the embodiments can be combined with each other.

In the following description, a lot of specific details have been set forth in order to fully understand the utility model, but the utility model can also be implemented in other ways different from those described here, therefore, the protection scope of the utility model is not limited by the following limitations of the specific embodiments disclosed.

The electric fan according to some embodiments of the present utility model is described below with reference to FIGS. 1 to 3 .

As shown in Fig. 1 and Fig. 2, the embodiment of the first aspect of the utility model provides an electric fan, the electric fan includes: a machine head 10, the machine head 10 includes fan blades 12, fan motor 16 and net cover 14, the fan The blade 12 and the fan motor 16 are located in the net cover 14, and the fan blade 12 is connected with the fan motor 16; the swing head support 20, the swing head support 20 is a hollow structure, and one end of the swing head support 20 is connected with the machine head 10, and The swing head support 20 is positioned at the outside of the net cover 14; the first driving device 208, the first drive device 208 is arranged in the swing head support 20; the transmission device, the transmission device is arranged in the swing head support 20, and the transmission device includes a drive gear 212 and The driven gear 214 and the driving gear 212 are connected with the first driving device 208 , the driving gear 212 cooperates with the driven gear 214 directly or indirectly, the driven gear 214 is connected with the machine head 10 and drives the machine head 10 to swing.

The electric fan provided by the utility model includes a machine head 10, a first driving device 208 and a transmission device, wherein the machine head 10 includes a fan blade 12, a fan motor 16 and a net cover 14, and the fan blade 12 and the fan motor 16 are located at In the net cover 14, the fan blade 12 is connected with the fan motor 16, the swing head support 20 is a hollow structure, and one end of the swing head support 20 is connected with the machine head 10, and the swing head support 20 is located outside the net cover 14, the first The driving device 208 is arranged in the swing head support 20, and the transmission device is arranged in the swing head support 20. The transmission device includes a driving gear 212 and a driven gear 214. The driving gear 212 is connected with the first driving device 208, and the driving gear 212 is connected with the driven gear 214. The driven gear 214 is matched directly or indirectly, the driven gear 214 is connected with the machine head 10, and drives the machine head 10 to swing. The gear 214 rotates, and finally, driven by the driven gear 214, the machine head 10 rotates, realizing the up and down movement of the machine head 10, multi-angle air supply, realizing a wide range of three-dimensional air supply, and improving the user experience; at the same time , the device for driving the swing of the machine head 10 is arranged outside the machine head 10, which reduces the size of the machine head 10, makes the appearance of the electric fan more beautiful, and makes the electric fan more stable during the swing of the machine head 10, avoiding It solves the problem that the head is too large, which causes the head to swing unstable; by changing the transmission ratio of the gears, the frequency of the swing of the machine head 10 is changed, which is convenient for users to adjust and makes the electric fan more intelligent. The fan motor 16 is located inside the net cover 14, which is different from the previous fan motor 16 located behind the net cover 14, which does not fully utilize the space in the net cover 14, and simultaneously increases the overall size of the electric fan head. On the one hand, the solution makes full use of the space in the net cover 14, making the machine head 10 thinner as a whole; The size and shape of the first driving device 208 help to reduce the cost.

As shown in Fig. 2 and Fig. 3, in one embodiment of the present utility model, preferably, the transmission device further includes: three transmission gears, and the three transmission gears are arranged between the driving gear 212 and the driven gear 214, wherein , two adjacent transmission gears match or coaxially set.

In this embodiment, the first transmission gear 216 meshes with the driving gear 212, the second transmission gear 218 is coaxial with the first transmission gear 216, the third transmission gear 220 meshes with the second transmission gear 218, and the third transmission gear 220 meshes with the driven gear 214, and transmits the torque sequentially, and finally to the machine head 10 to realize the swing of the machine head 10. At the same time, the multi-stage gears play the role of multi-stage speed regulation, which is convenient for adjusting the swing head of the machine head 10 frequency to meet user needs. In other embodiments, the number of transmission gears and the way of cooperation are not limited thereto, and can be set as required.

As shown in Figure 2 and Figure 3, in one embodiment of the present utility model, preferably, the swing head bracket 20 includes: a main body and a bending part forming an obtuse angle with the main body; wherein, the main body is connected with the bending part, and the bending part The other end of the bent part is connected with the machine head 10, and the main body is arranged along the vertical direction.

In this embodiment, the oscillating head support 20 includes a main body and a bent part forming an obtuse angle with the main body, wherein the main body is connected to the bent part, and the other end of the bent part is connected to the machine head 10, and the main body is vertically The direction is set so that the size of the head of the electric fan is significantly reduced, and the center of gravity of the electric fan is located inside the swing head bracket 20, that is, the center of gravity of the electric fan moves down from the head of the electric fan, which avoids the previous top-heavy phenomenon, which causes the electric fan When the fan shakes its head, the electric fan is unstable, and it will fall if it is subjected to a slight external force.

As shown in Figure 3, in one embodiment of the present utility model, preferably, the electric fan also includes: fan motor bracket 202, one end of fan motor bracket 202 is connected with driven gear 214, the other end of fan motor bracket 202 Connected with the machine head 10 , the fan motor 16 is arranged on one end of the fan motor bracket 202 facing the machine head 10 .

In this embodiment, the electric fan also includes a fan motor bracket 202 and a fan motor 16, one end of the fan motor bracket 202 is connected to the driven gear 214, the other end of the fan motor bracket 202 is connected to the machine head 10, and the fan motor 16 is set On one end face of the fan motor support 202, and the fan motor 16 is located in the machine head 10, the machine head 10 is connected with the driven wheel through the fan motor support 202, and driven by the driven wheel, the rotary air supply of the machine head 10 is realized. The existence of the fan motor support 202 makes the machine head 10 unnecessary to be directly installed and connected with the driven wheel, so that the machine head 10 is installed more stably, which helps to keep the electric fan stable. The fan motor 16 is arranged in the machine head 10 to drive the fan blades 12 High-speed rotation drives a large amount of air flow to form wind.

As shown in Figure 3, in one embodiment of the present utility model, preferably, the electric fan includes: a connecting shaft 222, the connecting shaft 222 is connected with the driven gear 214, and the axis of the connecting shaft 222 is along the horizontal direction; The rotating shaft 222 is inserted on the fan motor support 202 and is fixedly connected with the fan motor support 202 so that the fan motor support 202 rotates vertically following the connecting rotating shaft 222 .

In this embodiment, the electric fan includes a connecting shaft 222, the connecting shaft 222 is connected with the driven gear 214, and the axis of the connecting shaft 222 is along the horizontal direction. The motor bracket 202 is fixedly connected, and the fan motor bracket 202 can rotate synchronously with the connecting shaft, thereby driving the machine head 10 to rotate synchronously, making full use of the torque output by the driven gear 214, and the machine head 10 rotates more smoothly. A bearing 224 is disposed between the connecting shaft and the driven gear 214 to support and fix the connecting shaft 222 so that the connecting shaft 222 and the driven gear 214 rotate together.

As shown in Figure 3, in one embodiment of the present utility model, preferably, the fan motor bracket 202 includes: a bottom plate and two side plates; wherein, the two side plates are respectively connected to the two ends of the bottom plate, and the two The side plates are arranged in parallel, and the rotating shaft passes through the two side plates and is rotatably connected with the swing head support 20 .

In this embodiment, the fan motor support 202 includes a bottom plate and two side plates, wherein the two side plates are respectively connected to the two ends of the bottom plate, and the two side plates are arranged in parallel, and the cross section of the fan motor support 202 is U. Type, the connecting shaft 222 passes through the two parallel side walls of the fan motor bracket 202, and is rotationally connected with the swing head bracket 20. One end of the horizontal connecting shaft 222 is fixedly connected to one side of the U-shaped bracket, and the other end is fixedly connected to the other side of the U-shaped bracket. On the one hand, the U-shaped bracket is not easy to deform and has good rigidity. At the same time, because the horizontal connecting shaft 222 is a shaft, the concentricity of the left and right sides is good and the rotation is smooth.

As shown in Fig. 3, in one embodiment of the present utility model, preferably, the electric fan further includes: a net cover installation plate 204, and the net cover installation plate 204 is arranged on the side of the motor on the fan motor support 202, and the net The cover 14 is connected to the net cover mounting plate 204 , and the fan motor 16 is located in the net cover 14 so that the fan motor 16 is located in the machine head 10 .

In this embodiment, the electric fan also includes a net cover installation plate 204, wherein the net cover installation plate 204 is arranged on the side where the motor is provided on the fan motor support 202, the net cover 14 is connected with the net cover installation plate 204, and the fan Motor 16 is positioned at net cover 14, so that fan motor 16 is positioned at machine head 10, and net cover mounting disc 204 has provided installation space for fan motor 16 and net cover 14, and net cover 14 covers and sets fan motor 16, prevents Dust falls in the motor, and affects the normal work of fan motor 16.

As shown in Figure 1, in one embodiment of the present utility model, preferably, the electric fan includes: a fan motor bracket shell 206, which is located between the machine head 10 and the swing head bracket 20, and is buckled on the grille mounting plate 204 on the side facing the swing head support 20 , the fan motor support housing 206 covers the fan motor support 202 .

In this embodiment, the electric fan also includes a fan motor bracket shell 206, which is located between the machine head 10 and the swing head bracket 20, and is fastened on the side of the grill mounting plate 204 facing the swing head bracket 20. The fan motor The bracket shell 206 covers the fan motor bracket 202 to play a dustproof role and keep the inside of the electric fan clean and tidy.

As shown in Figure 3, in one embodiment of the present utility model, preferably, the electric fan further includes: a second driving device 210, a second transmission device and a column 30; wherein, the second driving device 210 is arranged on the swing head bracket 20 , the second transmission device is arranged in the column 30 , and the second driving device 210 cooperates with the second transmission device to make the swing head support 20 and the machine head 10 rotate in the horizontal direction relative to the column 30 .

In this embodiment, the electric fan further includes a second drive device 210, a second transmission device and a column 30, wherein the second drive device 210 is arranged in the swing head bracket 20, the second transmission device is arranged in the column 30, and the second transmission device is arranged in the column 30. The second driving device 210 cooperates with the second transmission device, so that the swing head bracket 20 and the machine head 10 rotate in the horizontal direction relative to the column 30, and the left and right swing of the machine head 10 is realized. The function realizes the air supply in a wider range and improves the user experience and satisfaction.

As shown in FIG. 1 and FIG. 2 , in one embodiment of the present invention, preferably, the electric fan further includes: a control device connected to the first driving device 208 and the second driving device 210 respectively.

In this embodiment, the electric fan also includes a control device, which is connected to the first driving device 208 and the second driving device 210 respectively, and controls the swing angle and swing speed of the head 10 up and down, left and right, etc. Through the control device, the fan can be individually controlled to swing up and down and left and right, and adjust it according to its own needs, which improves the user's experience and satisfaction.

To sum up, in the electric fan provided by the utility model, the up and down oscillating mechanism and the left and right oscillating mechanism are all installed in the shell of the oscillating head part. The utility model is provided with two driving devices, which realizes the air supply to the machine head 10 up and down, left and right directions, and can also perform air supply up and down or left and right separately during work, and the air supply angle can be adjusted, so that the electric fan has Multi-angle, large-scale three-dimensional air supply. When the air is supplied at a large angle, it can be used as an air circulation fan. When there are few people, the air can be supplied at a small angle, and the wind force can be small, which can save power; there are many angles for shaking the head up and down and left and right. The adjustable gear is realized by controlling the steering of the drive motor through the circuit.

In the present invention, the term "plurality" refers to two or more than two, unless otherwise clearly defined. The terms "installation", "connection", "connection", "fixed" and other terms should be interpreted in a broad sense, for example, "connection" can be fixed connection, detachable connection, or integral connection; "connection" can be directly or indirectly through an intermediary. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present utility model according to specific situations.

In the description of this specification, descriptions of the terms "one embodiment", "some embodiments", "specific embodiments" and the like mean that specific features, structures, materials or characteristics described in conjunction with the embodiments or examples are included in the present application. Novel at least one embodiment or example. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The above descriptions are only preferred embodiments of the utility model, and are not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present utility model shall be included in the protection scope of the present utility model.

Claims (10)

1. a kind of electric fan, which is characterized in that the electric fan includes：

Head, the head include flabellum, fan motor and guard, and the flabellum and the fan motor are located at the guard It is interior, and the flabellum is connected with the fan motor；

Yaw stent, the yaw stent are hollow structure, and one end of the yaw stent is connected with the head, and described Yaw stent is located at the outside of the guard；

First driving means, the first driving means are arranged in the yaw stent；

First transmission device, first transmission device are arranged in the yaw stent, and first transmission device includes driving Moving gear and driven gear, the drive gear are connected with the first driving means, the drive gear with it is described from Moving gear is directly or indirectly engaged, and the driven gear is connected with the head, and the head is driven to swing.

2. electric fan according to claim 1, which is characterized in that the transmission device further includes：

At least one transmission gear, the transmission gear is arranged between the drive gear and the driven gear, adjacent Two transmission gears are engaged or are coaxially disposed.

3. electric fan according to claim 1, which is characterized in that the yaw stent includes：

Main body and the bending part with the main body in obtuse angle；

Wherein, the main body is connected with the bending part, and the other end of the bending part is connected with the head, the master Body is placed in the vertical direction.

4. electric fan according to claim 1, which is characterized in that the electric fan further includes：

Electric machine support is fanned, one end of the fan electric machine support is connected with the driven gear, described to fan the another of electric machine support End is connected with the head, and the fan motor is arranged on the electric machine support of fanning towards on one end of the head.

5. electric fan according to claim 4, which is characterized in that the electric fan further includes：

Shaft is connected, the connection shaft is connected with the driven gear, and the axis for connecting shaft is along level side To；

The connection shaft is plugged on the fan electric machine support, and is fixedly connected with the fan electric machine support, so that the fan Electric machine support follows the connection shaft to rotate.

6. electric fan according to claim 5, which is characterized in that the fan electric machine support includes：

Bottom plate and two side plates；

Wherein, both ends of two side plates respectively with the bottom plate are connected, and the parallel setting of two side plates, described Shaft passes through two side plates, and is connected with the yaw holder pivots.

7. electric fan according to claim 4, which is characterized in that the electric fan further includes：

Guard mounting disc, the guard mounting disc be arranged on it is described fan electric machine support be equipped with motor one side, the guard with The guard mounting disc is connected, and the fan motor is located in the guard, so that the fan motor is located in the head.

8. electric fan according to claim 7, which is characterized in that the electric fan further includes：

Electric machine support shell is fanned, between the head and the yaw stent, and be located in the guard mounting disc court On the one side of the yaw stent, the fan electric machine support shell is provide with residence and states fan electric machine support.

9. electric fan according to any one of claim 1 to 8, which is characterized in that the electric fan further includes：

Second driving device, the second transmission device and column；

Wherein, second driving device is arranged in the yaw stent, and second transmission device is arranged on the column Interior, second driving device is engaged with second transmission device, so that the yaw stent and the head are opposite The column rotates.

10. electric fan according to claim 9, which is characterized in that the electric fan further includes：

Control device, the control device are connected respectively with the first driving means and second driving device.