Blade device and axial flow fan thereof

Abstract

The utility model discloses a blade device and an axial flow fan thereof, which belong to the technical field of axial flow fans, and comprise a central disc, a motor with an output end arranged on the central disc and used for driving the central disc to rotate, and a plurality of axial flow blades distributed on the outer side of the central disc at equal intervals, limiting structures used for fixing the positions of the axial flow blades on the center disc are arranged on the center disc and the axial flow blades. According to the utility model, the positioning screw rod at the corresponding position is screwed out to adjust the distance between the blades and reserve enough space to increase the axial flow blades, on the contrary, after the positioning screw rod is screwed off, the axial flow blades can be detached by rotating the knob, and the axial flow blades can be detached under the conditions of higher noise tolerance and tense budget. The axial flow fan provided with a small number of axial flow blades can be selected, the corresponding number of axial flow blades can be directly installed on the center disc according to the using environment and requirements in the occasion where large air volume is needed, noise can be reduced while the air volume is increased, and the whole fan blades do not need to be replaced.

Description

Technical Field

[0001] The utility model relates to the technical field of axial fans, and specifically relates to a blade device and an axial fan thereof. Background Art

[0002] An axial fan, also known as an axial-flow fan, is a common and versatile aerodynamic device. The core component of an axial fan is the impeller. When the motor drives the impeller to rotate, the blades on the impeller suck air from the air inlet, and under the push of the blades, the air is discharged along the axial direction.

[0003] In the prior art, Chinese Patent Publication No. CN219711866U discloses an axial fan impeller and an axial fan, including an axial fan and an impeller. The outer wall of the axial fan is fixedly connected with a support frame, and the outer wall of the support frame is fixedly connected with a housing. One side of the bottom end of the axial fan is fixedly connected with a support block. One side center of the impeller is fixedly connected with a connecting shaft, and one end of the connecting shaft is fixedly connected with a rotating disk. The outer wall of the impeller is fixedly connected with several fan blades. The utility model uses the support frame to fixedly support the outer wall of the axial fan in a sleeved manner, and then fixes the bottom of the axial fan through the support block, making the axial fan more stable, reducing and minimizing vibration, improving the rotation efficiency of the impeller. One end of the fan blade is connected to the inside of the connection port through a connecting rod, so that the fan blade is connected to the impeller, and then fixed by passing through a positioning rod, which is convenient for replacing different types of fan blades and improving the applicability of the device.

[0004] However, in the above patent, the spacing between each fan blade cannot be adjusted, and the number is fixedly set. The number of blades also has a certain influence on the noise and vibration performance of the axial fan. If the number of blades cannot be adjusted, the fan may have problems such as excessive noise when operating under certain working conditions, such as high air volume and high air pressure, affecting the use effect and comfort. Summary of the Utility Model

[0005] Aiming at the above existing technical deficiencies, the purpose of the utility model is to provide a blade device and an axial fan thereof to solve some or all of the problems in the above background art.

[0006] To solve the above technical problems, the utility model adopts the following technical solutions:

[0007] A blade device, comprising:

[0008] A central disk;

[0009] A motor, the output end of which is arranged on the central disk and is used to drive the central disk to rotate;

[0010] Axial-flow blades, several of which are arranged and evenly distributed on the outside of the central disk;

[0011] The limiting structure is arranged on the central disc and the axial flow blade, and is used to fix the position of the axial flow blade on the central disc;

[0012] The disassembly and assembly structure is arranged on the limiting structure and the central disc, and is used to install or remove the positioning structure and the axial flow blade on the central disc;

[0013] Among them, the disassembly and assembly structure includes a positioning structure for conveniently adjusting the position of the limiting structure, a guiding structure for restricting the moving direction of the positioning structure, and a linkage structure for controlling the movement of the positioning structure;

[0014] An adjusting structure is also arranged on the limiting structure, and is used to adjust the angle between the limiting structure and the axial flow blade.

[0015] Preferably, the limiting structure includes:

[0016] A turntable, arranged on the axial flow blade;

[0017] An arc-shaped sliding seat, movably installed on the central disc, and the arc-shaped sliding seat is rotatably installed on one side of the turntable;

[0018] A positioning screw hole, opened on the inner wall of the central disc;

[0019] A positioning screw rod, movably installed on the arc-shaped sliding seat;

[0020] Among them, a plurality of the positioning screw holes are arranged, and one end of the positioning screw rod penetrates through the arc-shaped sliding seat and is threadedly installed in a corresponding positioning screw hole, so as to limit the position of the arc-shaped sliding seat on the central disc.

[0021] Preferably, the positioning structure includes:

[0022] An annular installation groove, opened on the inner wall of the central disc;

[0023] An arc-shaped adjusting box, arranged on one side of the arc-shaped sliding seat, and the arc-shaped adjusting box is movably installed in the annular installation groove;

[0024] An arc-shaped positioning block, slidably installed on the inner wall of the arc-shaped adjusting box;

[0025] An annular guiding groove, opened on the inner wall of the annular installation groove, and the arc-shaped positioning block is movably installed in the annular guiding groove.

[0026] Preferably, the guiding structure includes:

[0027] A guiding sliding plate, arranged on one side of the arc-shaped positioning block;

[0028] A sliding groove, opened on the inner wall of the arc-shaped adjusting box, and the guiding sliding plate is slidably installed in the sliding groove, so as to limit the moving direction of the sliding groove;

[0029] The movable hole is opened on the arc-shaped adjustment box;

[0030] Wherein, the arc-shaped positioning block is slidably installed in the movable hole and is used to limit the moving direction of the arc-shaped positioning block.

[0031] Preferably, the linkage structure includes:

[0032] The connecting plate is arranged on one side of the guiding slide plate;

[0033] The connecting rod is rotatably installed on the connecting plate;

[0034] The threaded slider is slidably installed on the inner wall of the sliding groove, and the threaded slider is rotatably installed at one end of the connecting rod;

[0035] The left and right hand threaded screw rod is rotatably installed on the arc-shaped adjustment box;

[0036] The matching screw hole is opened on the inner wall of the threaded slider, and the left and right hand threaded screw rod is threadedly installed in the matching screw hole;

[0037] The knob is arranged at one end of the left and right hand threaded screw rod.

[0038] Preferably, the adjustment structure includes:

[0039] The threaded seat is arranged on the arc-shaped sliding seat;

[0040] The threaded insertion rod is threadedly installed on the inner wall of the threaded seat;

[0041] The insertion hole is opened on the turntable;

[0042] The rotating assembly is arranged on the turntable and is used to enable the turntable to rotate;

[0043] Wherein, a plurality of the insertion holes are arranged, and one end of the threaded insertion rod is movably installed in a corresponding insertion hole.

[0044] Preferably, the rotating assembly includes a limiting rotating groove opened on the inner wall of the arc-shaped adjustment box and a limiting rotating shaft rotatably installed in the limiting rotating groove. One end of the limiting rotating shaft penetrates through the arc-shaped sliding seat and is arranged on one side of the turntable to provide a rotating fulcrum for the turntable.

[0045] The present utility model also provides an axial flow fan, including the blade device described above.

[0046] The beneficial effects of the present utility model are as follows:

[0047] In the present utility model, by screwing out the positioning screw at the corresponding position from the positioning screw hole, the spacing of the axial flow blades on the central disk can be adjusted, and at the same time, enough space can be left to additionally increase the axial flow blades. Conversely, after unscrewing the positioning screw and then rotating the knob, the axial flow blades can be removed from the central disk. In the case of a high tolerance for noise and a tight budget, an axial flow fan with a small number of axial flow blades can be selected for use. If in a situation where a large air volume is required, the corresponding number of axial flow blades can be directly installed on the original central disk according to the usage environment and requirements for use, which can increase the air volume while reducing the generation of noise, and there is no need to completely replace the entire fan blade, saving equipment costs.

[0048] In the present utility model, by removing the axial flow blades from the central disk, it is convenient to replace the worn or damaged axial flow blades, or different-shaped axial flow blades can also be installed on the central disk for use. And by screwing out the threaded insertion rod from the turntable, the angle limitation of the axial flow blades can be released, and at this time, the axial flow blades can be rotated to adjust their angles. By adjusting the angles of the axial flow blades, the air volume output of the fan can be controlled to meet the air volume requirements under different working conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following-described drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0050] Figure 1 It is a schematic structural diagram of a blade device and its axial flow fan provided by an embodiment of the present utility model;

[0051] Figure 2 It is a schematic structural diagram of an annular installation groove of a blade device and its axial flow fan provided by an embodiment of the present utility model;

[0052] Figure 3 It is a schematic structural diagram of an arc-shaped sliding seat of a blade device and its axial flow fan provided by an embodiment of the present utility model;

[0053] Figure 4 It is a schematic cross-sectional view of a turntable of a blade device and its axial flow fan provided by an embodiment of the present utility model;

[0054] Figure 5 It is a schematic cross-sectional view of an arc-shaped adjustment box of a blade device and its axial flow fan provided by an embodiment of the present utility model.

[0055] DESCRIPTION OF THE REFERENCE NUMERALS:

[0056] 1. Central disk; 2. Motor; 3. Axial flow blade; 301. Turntable; 302. Arc-shaped sliding seat; 303. Positioning screw hole; 304. Positioning screw; 4. Annular mounting groove; 401. Arc-shaped adjustment box; 402. Guide slide plate; 403. Arc-shaped positioning block; 404. Annular guide groove; 405. Sliding groove; 406. Moving hole; 407. Connecting plate; 408. Connecting rod; 409. Threaded slider; 410. Left and right hand threaded lead screw; 411. Adaptor screw hole; 412. Knob; 5. Threaded seat; 501. Threaded insertion rod; 502. Insertion hole; 503. Limiting rotation groove; 504. Limiting rotating shaft. Specific implementation mode

[0057] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0058] Embodiment 1:

[0059] As Figures 1 to 5 shown, the present invention provides a blade device, including: a central disk 1 and a motor 2 with an output end arranged on the central disk 1 for driving the central disk 1 to rotate, and a number of axial flow blades 3 arranged equidistantly outside the central disk 1.

[0060] In order to facilitate adding or reducing the number of axial flow blades 3 on the central disk 1 according to the usage requirements, and installing axial flow blades 3 with different shapes on the central disk 1 for use, a limiting structure for fixing the position of the axial flow blades 3 on the central disk 1 is arranged on the central disk 1 and the axial flow blades 3, and a disassembly and assembly structure for installing or removing the positioning structure and the axial flow blades 3 on the central disk 1 is arranged between the limiting structure and the central disk 1. The disassembly and assembly structure includes a positioning structure for conveniently adjusting the position of the limiting structure, a guiding structure for restricting the moving direction of the positioning structure, and a linkage structure for controlling the movement of the positioning structure.

[0061] Among them, the limit structure includes a turntable 301 arranged on the axial flow blade 3, an arc-shaped sliding seat 302 movably installed on the central disk 1, the arc-shaped sliding seat 302 is rotatably installed on one side of the turntable 301, a positioning screw hole 303 opened on the inner wall of the central disk 1, a positioning screw 304 movably installed on the arc-shaped sliding seat 302, a plurality of positioning screw holes 303 are arranged, one end of the positioning screw 304 penetrates through the arc-shaped sliding seat 302 and is threadedly installed in a corresponding positioning screw hole 303 to limit the position of the arc-shaped sliding seat 302 on the central disk 1. Rotate the positioning screw 304 at the corresponding position, screw it out of the positioning screw hole 303, and at the same time pull out the positioning screw 304 from the arc-shaped sliding seat 302, then the position limit of the arc-shaped sliding seat 302 can be released.

[0062] Among them, the positioning structure includes an annular installation groove 4 opened on the inner wall of the central disk 1, an arc-shaped adjustment box 401 arranged on one side of the arc-shaped sliding seat 302, the arc-shaped adjustment box 401 is movably installed in the annular installation groove 4, an arc-shaped positioning block 403 slidably installed on the inner wall of the arc-shaped adjustment box 401, an annular guide groove 404 opened on the inner wall of the annular installation groove 4, the arc-shaped positioning block 403 is movably installed in the annular guide groove 404. Pushing the arc-shaped sliding seat 302 will drive the arc-shaped adjustment box 401 to move, the moving arc-shaped adjustment box 401 will slide in the annular installation groove 4, and at the same time will drive the arc-shaped positioning block 403 to move in the annular guide groove 404, thereby restricting the moving direction of the arc-shaped adjustment box 401.

[0063] Among them, the guiding structure includes a guiding slide plate 402 arranged on one side of the arc-shaped positioning block 403, a sliding groove 405 opened on the inner wall of the arc-shaped adjustment box 401 for restricting the moving direction of the sliding groove 405, the guiding slide plate 402 is slidably installed in the sliding groove 405, a moving hole 406 opened on the arc-shaped adjustment box 401 for restricting the moving direction of the arc-shaped positioning block 403, the arc-shaped positioning block 403 is slidably installed in the moving hole 406. When the guiding slide plate 402 moves, it can slide in the sliding groove 405. By setting the sliding groove 405, the guiding slide plate 402 can be prevented from shifting, and at the same time the guiding slide plate 402 will drive the arc-shaped positioning block 403 to slide in the moving hole 406.

[0064] Among them, the linkage structure includes a connecting plate 407 arranged on one side of the guiding slide plate 402, a connecting rod 408 rotatably installed on the connecting plate 407, a threaded slider 409 slidably installed on the inner wall of the sliding groove 405, the threaded slider 409 being rotatably installed at one end of the connecting rod 408, a positive and negative thread screw rod 410 rotatably installed on the arc-shaped adjusting box 401, an adapted screw hole 411 opened on the inner wall of the threaded slider 409, the positive and negative thread screw rod 410 being threadedly installed in the adapted screw hole 411, a knob 412 arranged at one end of the positive and negative thread screw rod 410, rotating the knob 412 will drive the positive and negative thread screw rod 410 to rotate, so that the rotating positive and negative thread screw rod 410 can respectively drive the two threaded sliders 409 to move away from each other through the threaded cooperation with the two adapted screw holes 411, so that the threaded slider 409 pulls the connecting plate 407 to move through the connecting rod 408.

[0065] Embodiment 2:

[0066] On the basis of Embodiment 1, in order to facilitate the adjustment of the angle of the axial flow blade 3, an adjustment structure for adjusting the angle between the limit structure and the axial flow blade 3 is arranged on the limit structure.

[0067] Among them, the adjustment structure includes a threaded seat 5 arranged on the arc-shaped sliding seat 302, a threaded insertion rod 501 threadedly installed on the inner wall of the threaded seat 5, an insertion hole 502 opened on the turntable 301, a rotating assembly arranged on the turntable 301 for enabling the turntable 301 to rotate, a plurality of insertion holes 502 are arranged, one end of the threaded insertion rod 501 is movably installed in a corresponding insertion hole 502, rotating the threaded insertion rod 501 can make it move through the threaded cooperation with the threaded seat 5, and the moving threaded insertion rod 501 can be disengaged from the insertion hole 502 on the turntable 301. At this time, the angle limit of the turntable 301 can be released, and then the axial flow blade 3 can be rotated to adjust its angle.

[0068] Specifically, the rotating assembly includes a limiting rotating groove 503 opened on the inner wall of the arc-shaped adjusting box 401, a limiting rotating shaft 504 rotatably installed in the limiting rotating groove 503 for providing a rotating fulcrum for the turntable 301, one end of the limiting rotating shaft 504 penetrates through the arc-shaped sliding seat 302 and is arranged on one side of the turntable 301, and when the turntable 301 rotates, it can drive the limiting rotating shaft 504 to rotate in the limiting rotating groove 503.

[0069] The present utility model also provides an axial flow fan, including a blade device.

[0070] Working principle:

[0071] When it is necessary to disassemble the axial flow blade 3 from the central disk 1, the knob 412 on one side of the arc-shaped adjustment box 401 at the corresponding position can be rotated. The knob 412 will drive the left-right threaded screw rod 410 to rotate. Since the two threads on the left-right threaded screw rod 410 are arranged in the opposite direction, the rotating left-right threaded screw rod 410 can drive the two threaded sliders 409 to move away from each other through the thread engagement with the two mating screw holes 411, so that the threaded slider 409 pulls one end of the connecting rod 408 to flip and move, while the other end of the connecting rod 408 will rotate on one side of the connecting plate 407 and at the same time pull the connecting plate 407 to move. The moving connecting plate 407 will drive the guiding slide plate 402 to slide in the sliding groove 405, and at the same time the guiding slide plate 402 will drive the arc-shaped positioning block 403 to slide in the moving hole 406. Finally, the moving arc-shaped positioning block 403 can be completely disengaged from the annular guiding groove 404. At this time, the restriction on the arc-shaped adjustment box 401 can be released, and by pulling the axial flow blade 3, the arc-shaped adjustment box 401 can be pulled out from the annular installation groove 4 to realize the disassembly of the axial flow blade 3. On the contrary, the installation operation can be completed to replace the worn or damaged axial flow blade 3. If it is necessary to increase the number of axial flow blades 3 on the central disk 1, the positioning screw 304 at the corresponding position can be rotated and screwed out from the positioning screw hole 303, and at the same time the positioning screw 304 can be pulled out from the arc-shaped sliding seat 302 to release the position restriction on the arc-shaped sliding seat 302. Then the arc-shaped sliding seat 302 can be pushed. The arc-shaped sliding seat 302 will drive the arc-shaped adjustment box 401 to move. The moving arc-shaped adjustment box 401 will slide in the annular installation groove 4 and at the same time drive the arc-shaped positioning block 403 to move in the annular guiding groove 404 to prevent the arc-shaped adjustment box 401 from loosening from the annular installation groove 4. At the same time, the moving arc-shaped sliding seat 302 will move along the outer surface of the central disk 1. The continuously moving arc-shaped sliding seat 302 will drive the turntable 301 and the axial flow blade 3 to move to adjust the distance between two adjacent axial flow blades 3 and at the same time leave enough space on the central disk 1. Insert the arc-shaped adjustment box 401 into the annular installation groove 4 and rotate the knob 412 in the reverse direction to make the arc-shaped positioning block 403 re-insert into the annular guiding groove 404 to prevent the arc-shaped adjustment box 401 from loosening. Then the arc-shaped sliding seats 302 at each position can be adjusted to have the same distance. After adjustment, the positioning screw 304 is passed through the arc-shaped sliding seat 302 and re-screwed into the corresponding positioning screw hole 303 to fix the positions of the arc-shaped sliding seat 302 and the axial flow blade 3, and different-shaped axial flow blades 3 can also be replaced and used on the central disk 1 by disassembling the axial flow blade 3.

[0072] By rotating the threaded plug 501, it can move through the threaded fit with the threaded seat 5. The moving threaded plug 501 can disengage from the jack 502 on the turntable 301. At this time, the angle restriction on the turntable 301 can be released. Then rotate the axial flow blade 3, and the axial flow blade 3 can drive the turntable 301 to rotate. The turntable 301 will drive the limiting rotating shaft 504 to rotate in the limiting rotating groove 503, so that the turntable 301 can achieve the rotation effect, and then the angle of the axial flow blade 3 can be adjusted. After the adjustment, reverse-rotate the threaded plug 501 to insert it into the jack 502 at the corresponding position, and the angle of the axial flow blade 3 can be fixed again.

[0073] Obviously, those skilled in the art can make various changes and modifications to the present utility model without departing from the spirit and scope of the present utility model. Thus, if these modifications and variations of the present utility model fall within the scope of the claims of the present utility model and their equivalent technologies, the present utility model is also intended to include these changes and modifications.

Claims

1. A blade device, characterized in that, Comprising: Central disk (1); A motor (2) with its output end arranged on the central disk (1) for driving the central disk (1) to rotate; Axial flow blades (3), with several arranged and evenly distributed on the outside of the central disk (1); A limiting structure arranged on the central disk (1) and the axial flow blades (3) for fixing the position of the axial flow blades (3) on the central disk (1); A disassembly and assembly structure arranged on the limiting structure and the central disk (1) for installing or removing the positioning structure and the axial flow blades (3) on the central disk (1); Wherein, the disassembly and assembly structure includes a positioning structure for conveniently adjusting the position of the limiting structure, a guiding structure for restricting the moving direction of the positioning structure, and a linkage structure for controlling the movement of the positioning structure; An adjusting structure is also arranged on the limiting structure for adjusting the angle between the limiting structure and the axial flow blades (3).

2. The blade device according to claim 1, characterized in that, The limiting structure includes: A turntable (301) arranged on the axial flow blades (3); An arc-shaped sliding seat (302) movably installed on the central disk (1), and the arc-shaped sliding seat (302) is rotatably installed on one side of the turntable (301); Positioning screw holes (303) opened on the inner wall of the central disk (1); A positioning screw (304) movably installed on the arc-shaped sliding seat (302); Wherein, several positioning screw holes (303) are arranged, and one end of the positioning screw (304) penetrates through the arc-shaped sliding seat (302) and is threadedly installed in a corresponding positioning screw hole (303) for restricting the position of the arc-shaped sliding seat (302) on the central disk (1).

3. A blade device as claimed in claim 1, characterized in that, The positioning structure includes: An annular installation groove (4) opened on the inner wall of the central disk (1); An arc-shaped adjusting box (401) arranged on one side of the arc-shaped sliding seat (302), and the arc-shaped adjusting box (401) is movably installed in the annular installation groove (4); An arc-shaped positioning block (403) slidably installed on the inner wall of the arc-shaped adjusting box (401); An annular guiding groove (404) opened on the inner wall of the annular installation groove (4), and the arc-shaped positioning block (403) is movably installed in the annular guiding groove (404).

4. A blade device according to claim 1, characterized in that, The guiding structure includes: A guiding sliding plate (402) arranged on one side of the arc-shaped positioning block (403); A sliding groove (405) opened on the inner wall of the arc-shaped adjusting box (401), and the guiding sliding plate (402) is slidably installed in the sliding groove (405) for restricting the moving direction of the sliding groove (405); An activity hole (406) opened on the arc-shaped adjusting box (401); Wherein, the arc-shaped positioning block (403) is slidably installed in the activity hole (406) for restricting the moving direction of the arc-shaped positioning block (403).

5. A blade device according to claim 1, characterized in that, The linkage structure includes: A connecting plate (407) arranged on one side of the guiding sliding plate (402); A connecting rod (408) rotatably installed on the connecting plate (407); A threaded slider (409) slidably installed on the inner wall of the sliding groove (405), and the threaded slider (409) is rotatably installed at one end of the connecting rod (408); A left and right hand threaded screw rod (410) rotatably installed on the arc-shaped adjusting box (401); The adaptation screw hole (411) is opened on the inner wall of the threaded slider (409), and the left - hand and right - hand lead screw (410) is threadedly installed in the adaptation screw hole (411); The knob (412) is arranged at one end of the left - hand and right - hand lead screw (410).

6. A blade device as claimed in claim 1, characterized in that, The adjusting structure includes: The threaded seat (5) is arranged on the arc - shaped sliding seat (302); The threaded insertion rod (501) is threadedly installed on the inner wall of the threaded seat (5); The jack (502) is opened on the turntable (301); The rotating assembly is arranged on the turntable (301) and is used to enable the turntable (301) to rotate; Among them, a plurality of the jacks (502) are arranged, and one end of the threaded insertion rod (501) is movably installed in a corresponding jack (502).

7. A blade device according to claim 6, wherein The rotating assembly includes a limiting rotating groove (503) opened on the inner wall of the arc - shaped adjusting box (401) and a limiting rotating shaft (504) rotatably installed in the limiting rotating groove (503). One end of the limiting rotating shaft (504) penetrates through the arc - shaped sliding seat (302) and is arranged on one side of the turntable (301) to provide a rotating fulcrum for the turntable (301).

8. An axial flow fan, characterized in that, It includes the blade device according to any one of claims 1 - 7.

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