CN109185226B

CN109185226B - Ceiling fan and fan blade thereof

Info

Publication number: CN109185226B
Application number: CN201811245147.1A
Authority: CN
Inventors: 张建生; 黄如辉; 熊伟; 黄汉华
Original assignee: Foshan Carro Electrical Co Ltd
Current assignee: Foshan Carro Electrical Co Ltd
Priority date: 2018-10-24
Filing date: 2018-10-24
Publication date: 2024-06-11
Anticipated expiration: 2038-10-24
Also published as: CN109185226A

Abstract

The invention provides a ceiling fan and a fan blade thereof. The fan blade comprises: a mounting part mounted on the hub of the ceiling fan; the main body blades are arranged on the mounting part and extend out along the radial direction for compressing and accelerating air flow; and a cut-in blade provided in the mounting portion, extending in a radial direction, and connected to the main body blade in the radial direction, wherein an outer contour of a side of the cut-in blade away from the main body blade is a gentle curve. When the ceiling fan is shifted, the edge shape is the cut-in blade with a moderation curve, so that the impact of air flow on the cut-in blade can be reduced, the compressed air surface of the centrifugal acceleration fan blade is gradually changed, the shaking problem when the ceiling fan is operated is further reduced, the stable operation of the ceiling fan is ensured, the noise is reduced, the turbulence is reduced, and the air quantity is increased.

Description

Ceiling fan and fan blade thereof

Technical Field

The invention relates to the technical field of fan equipment, in particular to a ceiling fan and fan blades thereof.

Background

For current ceiling fans, the blades thereon are rotated to form an air-out flow. When the ceiling fan starts gear shifting, the centrifugal acceleration of the ceiling fan can continuously change, and different air outlet requirements can be met. However, when the ceiling fan is shifted, the continuous change of the centrifugal acceleration easily causes unstable shaking, influences the air outlet effect, and also influences the operation stability of the ceiling fan.

Disclosure of Invention

Accordingly, it is necessary to provide a ceiling fan and its blades capable of avoiding shake, which is easy to occur due to the continuous variation of centrifugal acceleration when the conventional ceiling fan is shifted.

The above purpose is achieved by the following technical scheme:

A fan blade, comprising:

a mounting part mounted on the hub of the ceiling fan;

The main body blades are arranged on the mounting part and extend out along the radial direction for compressing and accelerating air flow; and

And the cutting blade is arranged on the mounting part, extends out along the radial direction and is connected with the main body blade in the radial direction, and the outer contour of one side of the cutting blade far away from the main body blade is a moderation curve.

In one embodiment, the moderation curve comprises at least one arcuate curve;

and/or the radius range of the moderation curve is 3000 mm-4000 mm.

In one embodiment, the fan blade further includes a first connection blade smoothly connecting the main body blade and the cut-in blade, and a width of the first connection blade gradually decreases from one end near the mounting portion to one end far from the mounting portion.

In one embodiment, the first connecting blade includes a first reinforcing section and a first transition section, one end of the first reinforcing section is connected with the mounting portion, the other end of the first reinforcing section is connected with the first transition section, the first reinforcing section makes the cut-in blade and the main blade set up on different sides, and the first transition section is smoothly connected with the cut-in blade and the main blade.

In one embodiment, the first reinforcing section has a preset height along an axial direction of the hub, and the preset height gradually decreases from an end near the mounting portion to an end far from the mounting portion, and the width of the first reinforcing section gradually decreases from an end near the mounting portion to an end far from the mounting portion.

In one embodiment, the width of the first transition section corresponds to the width of the first reinforcing section at the junction, and the width of the first transition section gradually decreases from the end connected with the first reinforcing section to the end far away from the first reinforcing section.

In one embodiment, the preset height ranges from 2mm to 4mm;

And/or the distance from the connection part of the first reinforcing section and the mounting part to one end of the mounting part far away from the first reinforcing section is 39 mm-65 mm;

And/or the distance from the connection part of the first transition section and the first reinforcing section to one end of the main body blade far away from the mounting part is 15 mm-35 mm.

In one embodiment, the fan blade further includes a sub blade disposed at the mounting portion, protruding in a radial direction, and connected to the main blade in the radial direction, and the sub blade is located at a side of the main blade away from the cut-in blade.

In one embodiment, the fan blade further includes a second connection blade smoothly connecting the main blade and the auxiliary blade, and a width of the second connection blade gradually increases from one end near the mounting portion to one end far from the mounting portion.

In one embodiment, the second connecting blade includes a second reinforcing section and a second transition section, one end of the second reinforcing section is connected with the mounting portion, the other end of the second reinforcing section is connected with the second transition section, the second reinforcing section bends the auxiliary blade relative to the main blade, and the second transition section smoothly connects the auxiliary blade with the main blade.

In one embodiment, the radius of the end of the second reinforcing section away from the second transition section is 2-5 mm;

The radius of one end of the second transition section far away from the second reinforcing section is 80-180 mm.

In one embodiment, a first included angle exists between the cutting blade and the main body blade, a second included angle exists between the auxiliary blade and the main body blade, and the cutting blade and the auxiliary blade incline towards the same surface of the main body blade;

and/or the first reinforcing section and the first transition section are of an integrated structure, the second reinforcing section and the second transition section are of an integrated structure, and the mounting part, the main body blade, the cutting blade, the auxiliary blade, the first connecting blade and the second connecting blade are of an integrated structure;

and/or the mounting part is used for being mounted to a mounting hole of the hub, and the distance between the mounting hole and one end of the mounting part, which is far away from the main body blade, is 9-15 mm.

A ceiling fan comprising a hub and a plurality of fan blades according to any of the above technical features;

The fan blades are distributed along the periphery of the hub.

After the technical scheme is adopted, the invention has at least the following technical effects:

The ceiling fan and the fan blades thereof can guide airflow to flow through the cut-in blades with the edge shape of a gentle curve, so that the outside airflow is conveniently led into the cut-in blades, then enters the main body blades through the cut-in blades, and is compressed and accelerated by the main body blades and then is sent out. The problem that vibration is easy to occur due to continuous change of centrifugal acceleration when the existing ceiling fan shifts is effectively solved. Therefore, when the ceiling fan is shifted, the edge shape of the cut-in blade is a gentle curve, the impact of air flow on the cut-in blade can be reduced, the compressed air surface of the centrifugal acceleration fan blade is gradually changed, the stable operation of the ceiling fan is ensured, the noise is reduced, the turbulence is reduced, and the air quantity is increased.

Drawings

FIG. 1 is a perspective view of a fan blade according to an embodiment of the present invention;

FIG. 2 is a front view of the fan blade shown in FIG. 1;

FIG. 3 is a cross-sectional view at A-A of FIG. 2;

FIG. 4 is a cross-sectional view at B-B as depicted in FIG. 2;

FIG. 5 is a cross-sectional view at C-C as depicted in FIG. 2;

FIG. 6 is a cross-sectional view at D-D of FIG. 2;

FIG. 7 is a cross-sectional view at E-E of FIG. 2;

FIG. 8 is a cross-sectional view at G-G of FIG. 2;

Fig. 9 is a cross-sectional view at H-H as described in fig. 2.

Wherein:

100-flabellum;

110-a mounting portion; 111-mounting holes;

120-body blades;

130-incising the blade;

140-first connection blades; 141-a first reinforcing section; 142-a first transition section;

150-auxiliary blades;

160-a second connecting blade; 161-a second reinforcement section; 162-second transition.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the following embodiments are used to further describe the ceiling fan and its fan blades in detail with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.

The numbering of the components itself, e.g. "first", "second", etc., is used herein merely to distinguish between the described objects and does not have any sequential or technical meaning. The term "coupled" as used herein includes both direct and indirect coupling (coupling), unless otherwise indicated. In the description of the present application, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present application and simplifying the description, and do not indicate or imply that the device or element in question must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present application.

In the present invention, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

Referring to fig. 1 and 2, the present invention provides a fan blade 100. The fan blade 100 is mainly applied to a ceiling fan. Of course, in other embodiments of the present invention, the fan blade 100 may be applied to other types of fans, such as a pedestal fan, a floor fan, and the like. After the fan blade 100 is adopted in the invention, the problem of shaking generated when the fan is started to shift gears can be avoided, the stable operation of the fan is ensured, the noise is reduced, the turbulence is reduced, and the air quantity is increased.

In one embodiment, the fan blade 100 includes a mounting portion 110, a main body blade 120, and a cutting blade 130. The mounting portion 110 is mounted to a hub of the ceiling fan. This allows fan blade 100 to be mounted to a hub. When the ceiling fan is in operation, the hub can drive the fan blades 100 to rotate so as to disturb the airflow to blow out the wind. It will be appreciated that the root of the fan blade 100 refers to the end of the fan blade 100 connected to the hub, and the tail of the fan blade 100 refers to the end of the fan blade 100 away from the hub.

Optionally, the mounting portion 110 is configured to mount to a mounting hole 111 of a hub. The fixing piece such as a screw piece can pass through the mounting hole 111 to be mounted on the hub, so that the mounting part 110 is mounted on the hub, and the fan blade 100 is reliably mounted on the hub, so that the fan blade 100 is prevented from being separated from the hub under the action of centrifugal force, and the ceiling fan is ensured to reliably operate. Alternatively, the mounting hole 111 is spaced from the mounting portion 110 at a distance of 9mm to 15mm from the end of the main body blade 120. That is, the distance between the mounting hole 111 and the end of the mounting portion 110 of the head of the fan blade 100 is 9mm to 15mm. This ensures that the blade 100 is at the optimal point of application and avoids the tail of the blade 100 from falling. As is clear from fig. 4, the mounting portion 110 has a stepped structure, and the surface having the mounting hole 111 is lower than the surface where the mounting portion 110 and the main body blade 120 are connected.

Referring to fig. 1 and 2, the body blade 120 is provided to the mounting portion 110 and protrudes in a radial direction. The incised blades 130 are provided to the mounting portion 110, protrude in a radial direction, and are connected to the main body blades 120 in the radial direction. That is, one end of the body blade 120 is connected to the mounting portion 110, and the other end of the body blade 120 protrudes in a direction away from the mounting portion 110. As shown in fig. 1, the region S1 is the head of the blade of the fan blade 100, and the region S2 is the tail of the fan blade 100. The head of the main blade 120 is connected to the mounting portion 110, and the tail of the main blade 120 is suspended.

One end of the incised blade 130 is connected to the mounting portion 110, and the other end of the incised blade 130 protrudes in a direction away from the mounting portion 110. That is, the head of the incised blade 130 is connected to the mounting portion 110, and the tail of the incised blade 130 is suspended. The main blade 120 and the incised blade 130 are disposed in parallel in the radial direction of the hub, and the side edge of the main blade 120 is connected to the side edge of the incised blade 130.

The incised blades 130 are used to introduce airflow into the main body blades 120. The body blades 120 serve to compress and accelerate the airflow. When the ceiling fan is in operation, air flow enters the fan blade 100 from the cutting blade 130 and is compressed and accelerated by the main body blade 120 to be sent out, so that the wind force can be increased, and the wind speed can be increased. Like this, can guarantee the air output of ceiling fan, satisfy user's different user demand, comfort level when guaranteeing to use.

The outer contour of the incised vane 130 on the side away from the main body vane 120 is a gentle curve. The relaxation curve is a curve in which the curvature provided between a straight line and a circular curve and between a circular curve and a circular curve continuously changes in a planar line shape. It can be understood that the moderation curve is generally applied to a road, and adapts to the smoothness of the running track and route of the steering operation of the automobile through the gradual change of the curvature, thereby moderating abrupt changes of the running direction and abrupt generation of centrifugal force; the centrifugal acceleration is gradually changed, lateral impact is not generated, the super-high speed is alleviated, and the centrifugal acceleration is used as a transition section of the super-high speed change to reduce driving vibration.

The relaxation curve is a constant velocity spiral, i.e. archimedes spiral, which can be done simultaneously. In the present invention, after the edge of the cut-in blade 130 adopts a gentle curve, the edge of the cut-in blade 130 moves at a constant speed, which can work on the air flow at the same time. In this way, after the edge of the cut-in blade 130 contacts with the airflow, the impact of the airflow on the cut-in blade 130 can be reduced, so that the centrifugal acceleration of the fan blade 100 is gradually changed, the shaking problem when the ceiling fan operates is further reduced, and the stable operation of the ceiling fan is ensured.

In one embodiment, the moderation curve includes at least one arcuate curve. That is, the moderating curve may be an arc curve of one segment or may be a multi-segment arc curve spliced. Thus, the purpose of reducing the impact of air flow on the cutting blades 130 can be achieved, so that the centrifugal acceleration of the fan blade 100 is gradually changed, the shaking problem when the ceiling fan operates is further reduced, and the stable operation of the ceiling fan is ensured. Optionally, the radius of the moderation curve ranges from 3000mm to 4000mm. This ensures a gentle curve curvature that allows the airflow that is cut into the blade 130 to flow smoothly, reducing shock.

Referring to fig. 1 to 9, in an embodiment, the fan blade 100 further includes a first connection blade 140 that smoothly connects the main blade 120 and the incised blade 130. The first connecting vane 140 can increase the strength of the fan blade 100, prevent the fan blade 100 from being damaged by airflow impact, and ensure the reliability of the fan blade 100. The width of the first connection blade 140 gradually decreases from one end near the mounting portion 110 to one end far from the mounting portion 110. This reduces wind resistance while ensuring the strength of the connection between the incised blades 130 and the main body blades 120. The width in the present invention means a dimension along the circumferential direction of the hub.

It can be appreciated that the head of the fan blade 100, i.e. the end of the main blade 120 close to the mounting portion 110, needs a larger strength to ensure that the hub drives the fan blade 100 to rotate; the tail of the fan blade 100, i.e., the end of the main body blade 120 away from the mounting portion 110, requires less strength to reduce turbulence and increase the air volume. Accordingly, the first connection blade 140 has a wider width near the mounting portion 110 and a narrower width at one end far from the mounting portion 110.

Based on hydrodynamic and finite element analysis, the root portion of the blade 100 requires greater strength and the tail portion does not require greater strength, dividing the first connecting blade into a first stiffening segment 141 and a first transition segment 142. One end of the first reinforcing section 141 is connected to the mounting portion 110, and the other end of the first reinforcing section 141 is connected to the first transition section 142. The first reinforcing section 141 is provided so as to be different from the main body blade 120 in the cut-in blade 130, and the first transition section 142 smoothly connects the cut-in blade 130 and the main body blade 120.

The first reinforcing section 141 can strengthen the strength between the cutting blade 130 and the main blade 120, so as to increase the strength of the fan blade 100, improve the anti-impact airflow capability of the fan blade 100, and improve the reliability of the fan blade 100. After the first transition section 142 is smoothly connected with the cutting blade 130 and the main blade 120, turbulence of the air flow can be reduced, so as to ensure smooth running of the air flow, further ensure smooth running of the fan blade 100, and reduce shaking of the fan blade 100. In addition, the first reinforcement 141 is provided on the opposite side of the blade 130 from the blade 120, so that the strength of the blade 100 is enhanced, the impact of the airflow on the first reinforcement 141 is reduced, the vibration of the blade 100 is reduced, and the noise is reduced.

In an embodiment, the first reinforcing section 141 has a predetermined height along the axial direction of the hub, and the predetermined height gradually decreases from an end near the mounting portion 110 to an end far from the mounting portion 110, and the width of the first reinforcing section 141 gradually decreases from an end near the mounting portion 110 to an end far from the mounting portion 110. That is, in the axial direction, the cutting blades 130 are inclined, and the inclined dimension is larger at the front of the blade 100 and smaller at the rear of the blade 100, so that the blade 100 can have sufficient connection strength at the root of the blade 100. Optionally, the preset height ranges from 2mm to 4mm.

In one embodiment, the width of the first transition section 142 corresponds to the width of the junction of the first reinforcing section 141, and the width of the first transition section 142 decreases gradually from the end connected to the first reinforcing section 141 to the end distant from the first reinforcing section 141. The first transition section 142 may direct the flow of the airflow and reduce airflow impingement and turbulence. And, the size of the first transition section 142 gradually decreases to zero. Thus, the tail of the fan blade 100 is a plane, which further reduces the turbulence of the fan blade 100 and increases the air quantity.

In addition, as can be seen from fig. 3, the connection between the mounting portion 110 and the main body blade 120 is coplanar, so that the main body blade 120 and the mounting portion 110 can be reliably connected. In one embodiment, the distance from the connection between the first reinforcing section 141 and the mounting portion 110 to the end of the mounting portion 110 away from the first reinforcing section 141 is 39mm to 65mm. That is, the distance between the joint between the incised blade 130 and the mounting portion 110, that is, the joint between the incised blade 130, the mounting portion 110, and the main body blade 120, and the distance between the mounting portion 110 and the incised blade 130 is 39mm to 65mm. Namely, the first reinforcing section 141 starts to deviate from the mounting hole 111 by 30mm to 50mm to form a fall plane with a preset height, and the height of the fall plane is selected to be 2mm to 4mm. This ensures the strength of the fan blade 100.

Further, the distance from the junction of the first transition section 142 and the first reinforcing section 141 to the end of the main body blade 120 remote from the mounting portion 110 is 15mm to 35mm. That is, the smooth connection is 15mm to 35mm from the end of the cutting blade 130 remote from the mounting portion 110. That is, the cut-in blade 130 is connected in a planar manner at a position 15-35 mm away from the tail end of the fan blade 100, so as to reduce turbulence at the tail of the fan blade 100 and increase air quantity.

The explanation is based on the vertical and horizontal directions shown in fig. 2, and fig. 4 to 9 are sectional views of the fan blade 100 of fig. 2 in the order from right to left. As can be seen from fig. 5, the cutting blade 130 and the main blade 120 are not coplanar, i.e., the cutting blade 130 and the main blade 120 are spaced apart from each other in the lateral direction by a predetermined distance. From right to left through fig. 6 to 9, the distance between the cut-in blade 130 and the main body blade 120 in the left-right direction gradually decreases.

In this embodiment, the first connecting blade 140 can smoothly connect the main blade 120 and the cutting blade 130. That is, the first connection blade 140 is an inclined surface, and the inclined surface may guide the airflow by connecting the main body blade 120 and the cut-in blade 130. In addition, the width of the inclined surface gradually decreases along the extending direction of the cutting blade 130, so that the turbulent flow at the tail of the fan blade 100 can be reduced and the air quantity can be increased while the root strength of the fan blade 100 is ensured. Of course, in other embodiments of the present invention, the first connecting blade 140 also smoothly connects the main body blade 120 and the incised blade 130. Further, the cutting blade 130 and the main body blade 120 are smoothly connected by the first connection blade 140, and the height dimension of the first connection blade 140 is correspondingly reduced as the distance between the cutting blade 130 and the main body blade 120 is reduced from right to left.

In an embodiment, the fan blade 100 further includes a sub blade 150 disposed at the mounting portion 110, protruding in a radial direction, and connected to the main blade 120 in the radial direction, and the sub blade 150 is located at a side of the main blade 120 away from the incised blade 130. The sub blades 150 serve to re-compress and accelerate the air flow of the main body blades 120, thereby forming a larger wind direction blowing out per unit area to increase wind power and wind speed.

It will be appreciated that the secondary blade 150 and the cutting blade 130 are located on either side of the main body blade 120. After the air flow is introduced into the fan blade 100 by the cutting blade 130, the air flow can be guided to the main blade 120, compressed and accelerated by the main blade 120, then enters the auxiliary blade 150, compressed and accelerated by the auxiliary blade 150, and then is sent out.

In one embodiment, the fan blade 100 further includes a second connecting blade 160 that smoothly connects the main blade 120 and the auxiliary blade 150. The second connecting vane 160 can increase the strength of the fan blade 100, prevent the fan blade 100 from being damaged by airflow impact, and ensure the reliability of the fan blade 100. Meanwhile, the second connection blades 160 may also reduce wind resistance and increase air volume.

The width of the second connection vane 160 gradually increases from one end near the mounting portion 110 to one end far from the mounting portion 110. This reduces wind resistance and increases the amount of wind while securing the strength of connection between the sub-blades 150 and the main body blades 120. It will be appreciated that the root of the fan blade 100, i.e. the end of the main blade 120 near the mounting portion 110, requires less wind resistance; the tail of the fan blade 100, i.e., the end of the main body blade 120 away from the mounting portion 110, requires a large air volume. Accordingly, the second connection vane 160 is narrower in width near the mounting portion 110 and wider at one end far from the mounting portion 110.

Based on hydrodynamic and finite element analysis, the root of blade 100 requires greater strength and the tail does not. Therefore, the second connection blade is divided into a second reinforcing section 161 and a second transition section 162, one end of the second reinforcing section 161 is connected to the mounting portion 110, the other end of the second reinforcing section 161 is connected to the second transition section 162, the second reinforcing section 161 bends the sub blade 150 with respect to the main body blade 120, and the second transition section 162 smoothly connects the sub blade 150 with the main body blade 120.

The second reinforcing section 161 can strengthen the strength between the auxiliary blade 150 and the main blade 120, so as to increase the strength of the fan blade 100, improve the anti-impact airflow capability of the fan blade 100, and improve the reliability of the fan blade 100. After the second transition segment 162 is smoothly connected with the auxiliary blade 150 and the main blade 120, airflow turbulence can be reduced to increase air quantity, and meanwhile, smooth running of the air flow can be ensured, so that smooth running of the fan blade 100 is ensured, shaking of the fan blade 100 is reduced, and noise is reduced. In addition, after the secondary blade 150 is bent with respect to the main blade 120 by the second reinforcing section 161, the strength of the fan blade 100 is enhanced, and the impact of the air flow on the second reinforcing section 161 is reduced, thereby reducing the vibration of the fan blade 100.

In this embodiment, the second connection blade 160 may smoothly connect the main body blade 120 and the sub-blade 150. That is, the second connection blade 160 is an arc surface, and the main body blade 120 and the sub-blade 150 are connected by the arc surface, and the arc surface can guide the airflow. In addition, the width of the arc surface gradually decreases along the extending direction of the auxiliary blade 150, so that the wind resistance of the fan blade 100 can be reduced, and the air output can be increased. Of course, in other embodiments of the present invention, the second connection vane 160 also smoothly connects the main body vane 120 and the sub-vane 150.

Optionally, the radius of the end of the second reinforcing section 161 away from the second transition section 162 is 2mm to 5mm. This reduces wind resistance while maintaining the strength of the fan blade 100. The radius of the end of the second transition section 162 far from the second reinforcing section 161 is 80 mm-180 mm. This reduces turbulence of the airflow and reduces vibration of the fan blade 100.

The explanation is based on the vertical and horizontal directions shown in fig. 2, and fig. 4 to 9 are sectional views of the fan blade 100 of fig. 2 in the order from right to left. From the various figures it can be seen that: the main body blade 120 and the sub-blade 150 are smoothly connected by the second connection blade 160, the dimension of the second connection blade 160 in the height direction is gradually increased from right to left, and the radius dimension of the second connection blade 160 is also gradually increased.

In one embodiment, a first angle exists between the cut-in blade 130 and the main body blade 120, a second angle exists between the sub-blade 150 and the main body blade 120, and the cut-in blade 130 and the sub-blade 150 are inclined toward the same surface of the main body blade 120. That is, the incised blades 130 are positioned on the same side as the subsidiary blades 150 with reference to the plane where the surface of the main body blade 120 is positioned. This facilitates airflow from the cutting blade 130 into the main body blade 120 and out through the auxiliary blade 150. Optionally, the first included angle ranges from 150 ° to 170 °, and the second included angle ranges from 150 ° to 170 °.

In one embodiment, the first reinforcing section 141 and the first transition section 142 are integrally formed, the second reinforcing section 161 and the second transition section 162 are integrally formed, and the mounting portion 110, the main body blade 120, the cutting blade 130, the auxiliary blade 150, the first connecting blade 140 and the second connecting blade 160 are integrally formed. This ensures the strength of the fan blade 100, and reduces the number of parts and assembly processes.

The invention also provides a ceiling fan, which comprises a hub and a plurality of fan blades 100 with any technical characteristics. A plurality of fan blades 100 are distributed along the circumferential side of the hub. Alternatively, the plurality of fan blades 100 are uniformly distributed on the circumferential side of the hub. Of course, in other embodiments of the present invention, the plurality of fan blades 100 may also be respectively arranged in a non-uniform manner. After the fan blade 100 is adopted by the ceiling fan, the air output is ensured, meanwhile, the shaking of the ceiling fan when the ceiling fan is started to shift gears can be avoided, and the stable operation of the ceiling fan is ensured.

The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be regarded as the description scope of the present specification.

The foregoing examples illustrate only a few embodiments of the invention and are described in detail herein without thereby limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of protection of the present invention is to be determined by the appended claims.

Claims

1. A fan blade, comprising:

a mounting part mounted on the hub of the ceiling fan;

The main body blades are arranged on the mounting part and extend out along the radial direction for compressing and accelerating air flow;

The cutting blade is arranged on the mounting part, extends out along the radial direction and is connected with the main body blade in the radial direction, and the outer contour of one side of the cutting blade, which is far away from the main body blade, is a moderating curve;

The auxiliary blade is arranged on the mounting part, extends out along the radial direction, is connected with the main body blade in the radial direction, and is positioned on one side of the main body blade away from the cutting blade;

A first connecting blade smoothly connecting the main body blade and the cut-in blade, the first connecting blade having a width gradually decreasing from one end near the mounting portion to one end far from the mounting portion; and

And the second connecting blade is in smooth connection with the main body blade and the auxiliary blade, and the width of the second connecting blade is gradually increased from one end close to the mounting part to one end far away from the mounting part.

2. The fan blade of claim 1, wherein the relief curve comprises at least one arcuate curve;

and/or the radius range of the moderation curve is 3000 mm-4000 mm.

3. The blade of claim 1, wherein the first connecting blade comprises a first reinforcing section and a first transition section, one end of the first reinforcing section is connected with the mounting portion, the other end of the first reinforcing section is connected with the first transition section, the first reinforcing section enables the cutting blade to be arranged on the opposite side of the main blade, and the first transition section is smoothly connected with the cutting blade and the main blade.

4. A fan blade according to claim 3, wherein the first reinforcing section has a predetermined height in the axial direction of the hub, and the predetermined height gradually decreases from an end near the mounting portion to an end far from the mounting portion, and the width of the first reinforcing section gradually decreases from an end near the mounting portion to an end far from the mounting portion.

5. The fan blade of claim 4, wherein the width of the first transition section corresponds to the width of the first stiffening section at the junction, and wherein the width of the first transition section decreases from the end connected to the first stiffening section to the end remote from the first stiffening section.

6. The fan blade according to claim 4 or 5, wherein the predetermined height is in the range of 2mm to 4mm;

7. The blade of claim 6, wherein the second connecting blade comprises a second reinforcing section and a second transition section, one end of the second reinforcing section is connected to the mounting portion, the other end of the second reinforcing section is connected to the second transition section, the second reinforcing section bends the auxiliary blade relative to the main blade, and the second transition section smoothly connects the auxiliary blade and the main blade.

8. The fan blade of claim 7, wherein the radius of the second reinforcing section at the end far from the second transition section is 2-5 mm;

9. The blade of claim 7, wherein a first angle exists between the cutting blade and the main blade, a second angle exists between the auxiliary blade and the main blade, and the cutting blade and the auxiliary blade are inclined toward the same surface of the main blade;

10. A ceiling fan comprising a hub and a plurality of blades as claimed in any one of claims 1 to 9;

The fan blades are distributed along the periphery of the hub.