CN116123128A

CN116123128A - Axial flow fan blade and fan

Info

Publication number: CN116123128A
Application number: CN202211571663.XA
Authority: CN
Inventors: 尹欧阳; 汤雁翔; 邹先平; 李亚冲; 冯远丙
Original assignee: Gree Electric Appliances Inc of Zhuhai
Current assignee: Gree Electric Appliances Inc of Zhuhai
Priority date: 2022-12-08
Filing date: 2022-12-08
Publication date: 2023-05-16

Abstract

The application discloses an axial fan blade and fan. The axial flow fan blade comprises a plurality of fan blades, a hub base and a chain component. The plurality of fan blades are distributed at intervals in the circumferential direction of the hub base. The chain assembly includes a chain and a plurality of sprockets engaged with the chain. The plurality of chain wheels are correspondingly arranged with the plurality of fan blades and are in transmission connection. The axis of each sprocket is disposed eccentrically with respect to the axis of the hub base. One of the plurality of sprockets is configured as a drive sprocket. The driving chain wheel drives other chain wheels to rotate through the chain so as to enable the fan blades to synchronously rotate. Each fan blade of the axial flow fan blade is in transmission connection with a corresponding chain wheel, the plurality of chain wheels are connected through chains, and when the driving chain wheel rotates, other chain wheels can be driven to synchronously rotate, so that the plurality of fan blades synchronously rotate, the angle adjustment of the plurality of fan blades is realized, and the applicability of the fan is improved. The plurality of sprockets are all eccentric to the hub base and are arranged, so that a motor shaft is avoided, and the influence on the rotation of the hub base during the angle adjustment of the fan blade is prevented.

Description

Axial flow fan blade and fan

Technical Field

The application relates to the technical field of fan blades, in particular to an axial flow fan blade and a fan.

Background

The angle of the fan blade of the traditional fan is not adjustable, so that the applicable occasion of the fan is single, and the fan needs to be replaced according to different applicable occasions, so that the time cost is high. In addition, in the manufacturing process of the traditional axial flow fan blade, the impeller and the hub are often manufactured into a whole, so that once the fan blade or the hub is damaged, the fan can only be scrapped, and the cost is high and the scrappage is extremely high. Moreover, different units have different requirements on the air quantity of the fan, and the fan needs to be opened again according to different air quantities, so that the mold opening period is long, the cost is high, and the efficiency is low.

It should be noted that the statements in this background section merely provide background information related to the present disclosure and may not necessarily constitute prior art.

Disclosure of Invention

The application provides an axial fan blade and fan to improve the suitability of fan.

The first aspect of the present application provides an axial flow fan blade, including: a hub base; the fan blades are distributed at intervals in the circumferential direction of the hub base; and the chain assembly comprises a chain and a plurality of chain wheels matched with the chain, the plurality of chain wheels are correspondingly arranged with the plurality of fan blades and are in transmission connection, the axis of each chain wheel is eccentrically arranged relative to the axis of the hub base, one of the plurality of chain wheels is configured as a driving chain wheel, and the driving chain wheel drives the other chain wheels to rotate through the chain so as to enable the plurality of fan blades to synchronously rotate.

In some embodiments, the chain assembly further comprises a plurality of first bevel gears disposed in correspondence with the plurality of sprockets, the first bevel gears rotatably disposed on the hub base and coaxially disposed with the sprockets, the fan blade comprises a blade body and a second bevel gear disposed at a radially inner end of the blade body, an axis of the second bevel gear intersecting an axis of the first bevel gear and the second bevel gear meshing with the first bevel gear.

In some embodiments, the axial flow fan blade further comprises a handle, the handle is arranged on the driving sprocket, and the handle is configured to rotate under the action of external force to drive the driving sprocket to rotate.

In some embodiments, the axial flow fan blade further comprises a stop for applying a resistance to the chain to hinder movement of the chain.

In some embodiments, the limiter comprises a body and a slider, one end of the slider having a tooth-like structure that is adapted to the shape of the teeth of the chain, the slider being slidably disposed on the body to engage or disengage the tooth-like structure of the slider with the teeth of the chain.

In some embodiments, the spacing element further comprises a fastener coupled to the sliding element, the fastener configured to apply a fastening force to the sliding element after the tooth structure engages the chain to prevent the tooth structure from disengaging from the chain.

In some embodiments, the fastener comprises a bolt, a first end of the bolt being connected to the slider, the bolt being threadedly engaged with the hub base and a second end of the bolt being radially outward of the hub base.

In some embodiments, the stop further comprises a spring having one end connected to the body and the other end connected to the slider, the spring being configured to apply a force to the slider away from the chain when the toothed structure is engaged with the chain.

In some embodiments, the hub cover further comprises a hub cover disposed on the hub base and enclosing with the hub base to form a cavity, and the chain assembly is disposed in the cavity.

A second aspect of the present application provides a fan comprising an axial flow fan blade as described above.

Based on the technical scheme that this application provided, axial fan blade includes a plurality of fan blades, wheel hub base and chain subassembly. The plurality of fan blades are distributed at intervals in the circumferential direction of the hub base. The chain assembly includes a chain and a plurality of sprockets engaged with the chain. The plurality of chain wheels are correspondingly arranged with the plurality of fan blades and are in transmission connection. The axis of each sprocket is disposed eccentrically with respect to the axis of the hub base. One of the plurality of sprockets is configured as a drive sprocket. The driving chain wheel drives other chain wheels to rotate through the chain so as to enable the fan blades to synchronously rotate. Each fan blade of the axial flow fan blade is in transmission connection with a corresponding chain wheel, the plurality of chain wheels are connected through chains, and when the driving chain wheel rotates, other chain wheels can be driven to synchronously rotate, so that the plurality of fan blades synchronously rotate, the angle adjustment of the plurality of fan blades is realized, and the applicability of the fan is improved. Moreover, a plurality of sprockets of this application embodiment all set up for the wheel hub base is eccentric, that is to say that the axis of sprocket and the axis of wheel hub base are coaxial and keep away from the axis of wheel hub base, and then avoid being used for controlling wheel hub base pivoted motor shaft that the central zone of profile base arranged, prevent to cause the influence to the rotation of wheel hub base when the angle modulation to the fan blade.

Other features of the present application and its advantages will become apparent from the following detailed description of exemplary embodiments of the present application, which proceeds with reference to the accompanying drawings.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiments of the application and together with the description serve to explain the application and do not constitute an undue limitation to the application. In the drawings:

fig. 1 is an overall schematic diagram of an axial flow fan blade according to an embodiment of the present application.

Fig. 2 is a schematic view of an internal structure of the axial flow fan blade in fig. 1.

Fig. 3 is a schematic view of the sprocket and chain engagement of fig. 1.

Fig. 4 is a schematic view of the engagement of the stop member and chain of fig. 1.

Fig. 5 is a schematic structural view of the limiting member in fig. 1.

Fig. 6 is a schematic structural view of the slider in fig. 5.

Fig. 7 is a schematic structural view of the main body in fig. 5.

Fig. 8 is a schematic structural view of the hub base in fig. 1.

Fig. 9 is a schematic view of the hub cap of fig. 1.

Detailed Description

The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all, of the embodiments of the present application. The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the application, its application, or uses. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments herein without making any inventive effort, are intended to be within the scope of the present application.

The relative arrangement of the components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present application unless it is specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective parts shown in the drawings are not drawn in actual scale for convenience of description. Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the techniques, methods, and apparatus should be considered part of the specification. In all examples shown and discussed herein, any specific values should be construed as merely illustrative, and not a limitation. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further discussion thereof is necessary in subsequent figures.

Spatially relative terms, such as "above … …," "above … …," "upper surface at … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial location relative to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "above" or "over" other devices or structures would then be oriented "below" or "beneath" the other devices or structures. Thus, the exemplary term "above … …" may include both orientations of "above … …" and "below … …". The device may also be positioned in other different ways and the spatially relative descriptions used herein are construed accordingly.

Because the angle of the fan commonly used in the prior art is not adjustable, the applicable occasion of the fan is single, the interchangeability is poor, the time cost is high, the cost is high, and the efficiency is low.

To ameliorate the above-mentioned deficiencies of the prior art, referring to fig. 1 to 3, an embodiment of the present application provides an axial flow fan blade comprising a plurality of fan blades 1, a hub base 2, and a chain assembly 3. The plurality of fan blades 1 are distributed at intervals in the circumferential direction of the hub base 2. The chain assembly 3 includes a chain 31 and a plurality of sprockets 33 that cooperate with the chain 31. The plurality of chain wheels 33 are correspondingly arranged and in transmission connection with the plurality of fan blades 1. The axis of each sprocket 33 is disposed eccentrically with respect to the axis of the hub base 2. One sprocket 33 of the plurality of sprockets 33 is configured as a drive sprocket. The driving sprocket drives the other sprockets 33 to rotate through the chain 31 so as to enable the fan blades 1 to synchronously rotate.

Every fan blade 1 of axial flow fan blade of this application embodiment all is connected with the sprocket 33 transmission that corresponds, and a plurality of sprockets 33 pass through chain 31 and connect, can drive other sprocket synchronous rotation when driving sprocket rotates, and then make a plurality of fan blades 1 synchronous rotation, and then realize the angle modulation of a plurality of fan blades 1, improve the suitability of fan. Moreover, the plurality of sprockets 33 of the embodiment of the present application are all eccentrically disposed with respect to the hub base 2, that is, the axis of the sprocket 33 is not coaxial with the axis of the hub base 2 and is far away from the axis of the hub base 2, so as to avoid the motor shaft which is arranged in the central area of the profile base 2 and is used for controlling the hub base 2 to rotate, and prevent the influence on the rotation of the hub base 2 during the angle adjustment of the fan blade 1.

Further, in some embodiments, the blades are detachably connected to the hub base 2, and damaged parts can be replaced when the blades or the hub are damaged, thereby reducing the cost and enhancing interchangeability, compared to the prior art in which the impeller and the hub are integrally manufactured.

Referring to fig. 1, in operation of the axial flow fan blade of the embodiment of the present application, the whole of the axial flow fan blade rotates around the axis of the hub base 2. When the axial flow fan blade in the embodiment of the application needs to adjust the angle of the fan blade 1, the angle of each fan blade 1 relative to the hub base 2 is to be adjusted, and at this time, the fan blade 1 is enabled to reach the target angle by controlling the driving sprocket to enable the fan blade 1 to rotate relative to the hub base 2 around the rotation axis extending along the radial direction.

When the angle of the fan blade 1 is changed, the air quantity of the axial flow fan blade can be changed during working. When the air quantity of the axial flow fan blade needs to be regulated, the driving sprocket can be rotated, the rotation of the driving sprocket can drive the other sprockets to synchronously rotate through the chain 31, and the rotation of the other sprockets further enables the fan blade 1 to synchronously rotate. Therefore, the same angles of the plurality of fan blades 1 are ensured, and the air quantity of the axial flow fan blades during working is stable and adjustable.

In the embodiment shown in fig. 1, the number of blades 1 is three and is centrally symmetrical with respect to the axis of the hub base 2. Correspondingly, the number of sprockets 33 is also three and is centrally symmetrical with respect to the axis of the hub base 2. The chain 31 is wound around the outside of the three sprockets 33. In embodiments not shown in other figures, the number of fan blades 1 may also be more than three.

Referring to fig. 2, the axis of the sprocket 33 is parallel and eccentrically disposed with respect to the axis of the hub base 2. And the axis of rotation of the fan blade 1 extends in a radial direction. The axis of the sprocket 33 intersects the axis of rotation of the fan blade 1. In order to achieve the transmission from the sprocket 33 to the fan blade 1, the chain assembly 3 further includes a plurality of first bevel gears 32 provided corresponding to the plurality of sprockets 33. A first bevel gear 32 is rotatably provided on the hub base 2 and is provided coaxially with a sprocket 33. The fan blade 1 comprises a blade body 11 and a second bevel gear 13 arranged at a radially inner end of the blade body 11. The axis of the second bevel gear 13 intersects the axis of the first bevel gear 32 and the second bevel gear 13 meshes with the first bevel gear 32. The sprocket 33 is located above the first bevel gears 32 in the height direction, and a plurality of the first bevel gears 32 are each eccentrically disposed on the hub base 2, and the rotational direction of the first bevel gears 32 is changed by the second bevel gears 13, thereby leaving a space in the central region of the hub base 2 for mounting the motor. The rotation axis of each sprocket 33 is far away from the motor shaft, so that the possibility of interference between the motor and the sprocket 33 is reduced, the working stability of the axial flow fan blade is improved, and the whole axial flow fan blade is more compact in structure.

Referring to fig. 1 and 2, in some embodiments, the axial flow fan blade further comprises a handle 5. The handle 5 is arranged on the drive sprocket. The handle 5 is configured to rotate under the action of external force to drive the drive sprocket to rotate. The fan blade 1 can be rotated to a target angle by manually rotating the handle 5.

In some embodiments, the axial flow fan blade further comprises a limiting member 4. The stopper 4 serves to apply resistance to the chain 31 to hinder movement of the chain 31. When the fan blade 1 reaches the target angle and needs to work, the movement of the chain 31 is limited by the limiting piece 4, so that the fan blade 1 is ensured not to rotate accidentally, and normal use is ensured.

Referring to fig. 4-7, in some embodiments, the limiter 4 includes a body 41 and a slider 42. One end of the slider 42 has a tooth-like structure B that is adapted to the shape of the sprocket of the chain 31. The slider 42 is slidably disposed on the main body 41 to engage or disengage the tooth structure B of the slider 42 with the chain 31. Specifically, the adaptation of the tooth-like structure B of the first end of the slider 42 to the shape of the sprocket of the chain 31 means that the tooth-like structure B is shaped to fit in a clearance between adjacent sprockets, thereby forming a snap fit, preventing the movement of the chain 31. When the axial flow fan blade works normally, the toothed mechanism B of the sliding piece 42 is clamped with the chain 31. When the angle of the fan blade 1 of the fan blade needs to be adjusted, the sliding piece 42 is separated from the chain 31 so that the chain 31 can move freely.

As shown in fig. 7, specifically, the main body 41 has an i-shaped structure, which forms a chute a through which the slider 42 slides by its own structure, and correspondingly, a slot is provided on the slider 42, and the slot cooperates with the chute a to enable the slider 42 to slide on the main body 41. The movement direction of the chain 31 is perpendicular to the movement direction of the slider 42, so that the stopper 4 can block the movement of the chain 31.

Referring to fig. 5, in some embodiments, the limiter 4 further comprises a fastener 43. The fastener 43 is connected with the slider 42. The fastener 43 is configured to apply a fastening force to the slider 42 after the tooth B engages the chain 31 to prevent the tooth B from disengaging from the chain 31.

In some embodiments, the number of the limiting members 4 is plural, and the plurality of limiting members 4 are circumferentially spaced apart from each other with the axis of the hub base 2 as a center. For example, in an embodiment in which the number of the fan blades 1 is three, the profile of the chain 31 may be approximated as an equilateral triangle, and in this case, the stoppers 4 may be configured to be three, and the three stoppers 4 are respectively located on three sides of the equilateral triangle. The sliding direction of the sliding member 42 of each stopper 4 is perpendicular to the moving direction of the chain 31. The plurality of limiting pieces 4 reduces the possibility of accidental change of the blade angle of the fan blade 1.

In some embodiments, the fastener 43 comprises a bolt. The first end of the bolt is connected to the slider 42. The bolts are threadedly engaged with the hub base 2 and the second ends of the bolts are located radially outwardly of the hub base 2. Specifically, when the bolt is tightened, the slider 42 moves toward the chain 31; when the bolt is unscrewed, the slider 42 is moved away from the chain 31.

Referring to fig. 5, in some embodiments, the limiter 4 further comprises a spring 44. One end of the spring 44 is connected to the body 41. The other end of the spring 44 is connected to the slider 42. When the tooth structure B engages the chain 31, the spring 44 is configured to apply a force to the slider 42 away from the chain 31. When it is desired to keep the blade angle unchanged, tightening the bolt moves the slider 42 toward the chain 31, and the spring 44 is configured to gradually lengthen from an initial length during the movement of the slider 42 toward the chain 31 to generate an elastic force to the slider 42 away from the chain 31. When the blade angle needs to be adjusted, the bolt is unscrewed to separate the toothed structure B from the chain 31, the spring 44 drives the sliding piece 42 to be away from the chain 31 under the action of self elastic force so as to prevent the toothed structure B from being clamped with the chain 31 again, and at the moment, the handle 5 can be rotated to adjust the blade angle, so that the operation experience is optimized.

In some embodiments, the number of springs 44 may be two, and the two springs 44 are symmetrically distributed on both sides of the bolt to ensure uniformity of the stress of the slider 42. After the tooth structure B is disengaged from the chain 31, the two springs can further secure the slider 42 away from the chain 31.

Referring to fig. 8 and 9, in some embodiments, the axial flow fan blade further comprises a hub cap 6. The hub cover 6 is arranged on the hub base 2 in a covering way and forms a cavity with the hub base 2 in a surrounding way. The chain assembly 3 is located within the cavity. Specifically, the hub base 2 is provided with a plurality of concave portions 21, and a plurality of first bevel gears 31 are respectively provided in the plurality of concave portions 21. The hub cover 6 is correspondingly provided with a mounting groove 61, and the mounting groove 61 is matched with the concave part 21 so that a cavity is formed when the hub cover 6 is covered on the hub base 2. Further, the hub base 2 further comprises a first through hole 22. The first through hole 22 is located in the center of the hub base 2 and is used for arranging a motor, and the motor drives the hub base 2 to rotate so that the fan blade 1 rotates. Correspondingly, the center region of the hub cap 6 is also provided with a second through hole 62 that mates with the first through hole 22.

In some embodiments, the hubcap 6 further includes a plurality of limiter mounting slots 63. A plurality of limiter mounting grooves 63 are spaced apart on the hubcap 6. Specifically, the edge portion of the body of the hub cover 6 has a plurality of recessed areas that communicate radially inward with the mounting groove 61 to form a plurality of stopper mounting grooves 63. Threaded holes 64 are formed in the wall of the hub cap 6 radially outside the stopper mounting groove 63. When the hub cover 6 is covered on the hub base 2, the second end of the bolt penetrates through the threaded hole 64 and extends outwards, the hub does not need to be disassembled, and the adjustment of the blade angle and the fixation after the adjustment can be completed only by screwing the bolt and the rotating handle.

The application also provides a fan, which comprises the axial flow fan blade.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present application and not for limiting the same; although the present application has been described in detail with reference to preferred embodiments, those of ordinary skill in the art will appreciate that: modifications may be made to the specific embodiments herein or equivalents may be substituted for part of the technical features; without departing from the spirit of the technical solutions of the present application, it should be covered in the scope of the technical solutions claimed in the present application.

Claims

1. An axial flow fan blade, characterized by comprising:

a hub base (2);

the plurality of fan blades (1) are distributed at intervals in the circumferential direction of the hub base (2); and

the chain assembly (3) comprises a chain (31) and a plurality of chain wheels (33) matched with the chain (31), wherein the plurality of chain wheels (33) are correspondingly arranged and in transmission connection with the plurality of fan blades (1), the axis of each chain wheel (33) is eccentrically arranged relative to the axis of the hub base (2), one chain wheel (33) in the plurality of chain wheels (33) is configured as a driving chain wheel, and the driving chain wheel drives other chain wheels (33) to rotate through the chain (31) so as to enable the plurality of fan blades (1) to synchronously rotate.

2. The axial flow fan blade according to claim 1, wherein the chain assembly (3) further includes a plurality of first bevel gears (32) provided in correspondence with a plurality of the sprockets (33), the first bevel gears (32) being rotatably provided on the hub base (2) and coaxially provided with the sprockets (33), the fan blade (1) including a blade body (11) and a second bevel gear (13) provided at a radially inner end of the blade body (11), an axis of the second bevel gear (13) intersecting an axis of the first bevel gears (32) and the second bevel gear (13) being meshed with the first bevel gears (32).

3. The axial flow fan blade according to claim 1, further comprising a handle (5), the handle (5) being arranged on the drive sprocket, and the handle (5) being configured to rotate under the effect of an external force to drive the drive sprocket.

4. The axial flow fan blade according to claim 1, further comprising a limiting member (4), the limiting member (4) being adapted to apply a resistance to the chain (31) to hinder movement of the chain (31).

5. The axial flow fan blade according to claim 4, wherein the stopper (4) includes a main body (41) and a slider (42), one end of the slider (42) has a tooth-like structure (B) that is adapted to the sprocket shape of the chain (31), and the slider (42) is slidably provided on the main body (41) to engage or disengage the tooth-like structure (B) of the slider (42) with the sprocket of the chain (31).

6. The axial flow fan blade according to claim 5, wherein the limiting piece further comprises a fastener (43), the fastener (43) is connected with the sliding piece (42), and the fastener (43) is configured to apply a fastening force to the sliding piece (42) after the tooth-like structure (B) is engaged with the chain (31) to prevent the tooth-like structure (B) from being disengaged from the chain (31).

7. The axial flow fan blade according to claim 6, wherein the fastener comprises a bolt, a first end of the bolt being connected to the slider (42), the bolt being in threaded engagement with the hub base (2) and a second end of the bolt being located radially outside the hub base (2).

8. The axial flow fan blade according to claim 5, wherein the limiting piece (4) further comprises a spring (44), one end of the spring (44) is connected with the main body (41), the other end of the spring (44) is connected with the sliding piece (42), and when the tooth-shaped structure (B) is clamped with the chain (31), the spring (44) is configured to apply a force to the sliding piece (42) away from the chain (31).

9. The axial flow fan blade according to any one of claims 1 to 8, further comprising a hub cover (6), wherein the hub cover (6) is arranged on the hub base (2) in a covering manner to form a cavity with the hub base (2), and the chain assembly (3) is arranged in the cavity.

10. A fan comprising an axial flow fan blade according to any one of claims 1 to 9.