Fan blade structure and fan using the same

Abstract

The present invention discloses a fan blade structure and a fan using the same, relating to the technical field of fans. The fan blade structure comprises a blade body, one end of which is fixedly connected to a blade connection block, the blade connection block being tapered, and the thickness of the blade connection block gradually increasing from the blade body to the blade connection block; the blade body comprises a carbide skeleton and an engineering plastic layer, the engineering plastic layer being distributed on both sides of the carbide skeleton, and the engineering plastic layer and the carbide skeleton being integrally connected using a composite process. The present invention effectively improves the strength of the connection portion by providing the tapered blade connection block. At the same time, the blade body is made of a composite of the carbide skeleton and the engineering plastic layer, having high strength and deformation resistance, reducing the deformation of the fan blade under high-speed rotation, and effectively increasing its service life.

Description

Technical Field

[0001] The present invention relates to the technical field of fans, and in particular to a fan blade structure and a fan using the same. Background Art

[0002] A ceiling fan is a fan fixedly installed on the ceiling. When working, the outer rotor motor on the ceiling fan drives the fan blades to rotate. The rotation of the fan blades drives air circulation to generate wind. Since the wind field generated by the ceiling fan is large and the wind is relatively soft, it is very popular among the public. In the application of ceiling fans, since the ceiling fans are completely exposed to the air, a large amount of dust will adhere to their surface after long-term use, which greatly affects the user experience.

[0003] To solve this problem, the prior art CN216812280U proposes a household detachable ceiling fan with high-strength fan blades. The fan utilizes a detachable structure to disassemble the fan blades, which is convenient for cleaning or replacing the fan blades. However, when the fan is in use, the fan blade angle is fixed, and the size of the wind field generated by the fan cannot be changed according to needs when it is no longer used, and the flexibility of use is low. At the same time, the above-mentioned ceiling fan only uses the elastic force of the spring to lock the fan blades. Since the fan blades rotate at high speed, they will generate a large centrifugal force when rotating. At the same time, the fan blades are inclined and will be subject to a certain lift. Relying solely on the spring to achieve locking, this connection method is not reliable, and the risk of the fan blades detaching is relatively high. To address the above problems, we provide a fan blade structure and a fan using the fan blade structure. Summary of the Invention

[0004] An object of the present invention is to provide a fan blade structure and a fan using the same, so as to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A fan blade structure includes a blade body, one end of which is fixedly connected to a blade connection block. The blade connection block is conical, and the thickness of the blade connection block increases piece by piece from the blade body to the blade connection block.

[0007] As a further solution of the present invention: the blade body includes a carbide skeleton and an engineering plastic layer, the engineering plastic layer is distributed on both sides of the carbide skeleton, and the engineering plastic layer and the carbide skeleton are connected into one body by a composite process.

[0008] A fan comprises a casing, an outer rotor motor, and the above-mentioned fan blade structure, wherein the outer rotor motor is arranged at the upper end of the casing, the outer rotor motor housing is fixedly connected to the casing, a suspension rod is fixedly connected to the connecting end of the outer rotor motor, the lower end of the casing is provided with four mounting openings, the four mounting openings are evenly distributed, a connecting block is provided inside the mounting openings, connecting columns are fixedly connected to both sides of the connecting block, the connecting columns are rotatably connected to the mounting openings, and a connecting assembly for connecting the fan blades is provided on the connecting block;

[0009] One end of the connecting block close to the interior of the housing is fixedly connected to a gear, and a driving assembly for driving the gear to rotate is provided inside the housing.

[0010] As a further solution of the present invention: the connecting assembly includes a plug, which is fixed on the connecting end of the fan blade, and U-shaped grooves are provided on both sides of the plug, one end of the U-shaped groove is slidably connected to a locking block, and the other end of the U-shaped groove is slidably connected to an L-shaped pressing rod, one end of the L-shaped pressing rod is fixedly connected to the locking block, and a second spring is installed between the inner end surface of the U-shaped groove and the L-shaped pressing rod, the end of the connecting block away from the casing is provided with a plug hole matching the plug, and both sides of the plug hole are provided with locking grooves matching the locking block, and the connecting block is provided with a locking assembly for locking the locking block.

[0011] As a further solution of the present invention: the locking assembly includes a rectangular slide groove, which is opened at a position of the connecting block close to the gear, and connecting holes connected to the lock groove are opened on both sides of the rectangular slide groove, and locking rods are slidably connected in the connecting holes, and a shift rod is fixedly connected between the ends of the two locking rods away from the plug, and the shift rod is slidably connected to the inside of the rectangular slide groove, and a first spring is installed between the two ends of the shift rod away from the locking rod and the inner end surface of the rectangular slide groove, and a lock hole matching the lock rod is opened on the lock block.

[0012] As a further solution of the present invention: both ends of the shift rod are fixedly connected with handle blocks.

[0013] As a further solution of the present invention: the driving assembly includes a lifting block, which is arranged in the middle of the lower end of the interior of the casing. Racks are installed in the middle of the four surfaces of the lifting block, and the racks are respectively engaged with gears. The four corners of the lifting block are slidably connected to limit slide rods, and the lower ends of the limit slide rods are fixedly connected to the lower end of the interior of the casing. A lifting assembly is provided inside the casing for driving the lifting block to move up and down.

[0014] As a further solution of the present invention: the lifting assembly includes a driving motor, which is arranged inside the casing and above the lifting block. Several motor frames are fixedly connected to the driving motor casing, and the end of the motor frame away from the driving motor is fixedly connected to the inner wall of the casing. The output end of the driving motor is fixedly connected to a threaded rod, the lower end of the threaded rod is rotatably connected to the lower end surface of the casing, the threaded rod is threadedly connected to the lifting block, and the upper end of the limiting slide rod is fixedly connected to the driving motor casing.

[0015] As a further solution of the present invention: the driving motor housing and the lower end surface of the casing are both provided with limit switches that cooperate with the lifting block.

[0016] As a further solution of the present invention: one end of the suspension rod away from the outer rotor motor is fixedly connected to a connecting seat, and a plurality of mounting holes are opened on the connecting seat.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. The present invention can effectively improve the strength of the connection part by setting a conical blade connecting block. At the same time, the blade body is made of a composite of a carbide skeleton and an engineering plastic layer, which has high strength and deformation resistance, reduces the deformation of the fan blade under high-speed rotation, and effectively improves the service life.

[0019] 2. The present invention can adjust the pitch angle of the fan blades when needed through the provided driving component, and thus can adjust the size of the generated wind field according to usage requirements. At the same time, the provided locking component can lock the locking block after the fan blades are connected, avoiding the problem of the locking block accidentally disengaging from the locking slot and causing the fan blades to disengage. At the same time, when the fan blades rotate at high speed, the shift rod and the locking rod will generate centrifugal force, so that the shift rod is always subjected to a force in the direction of the locking block, forming a double protection with the first spring, thereby greatly improving the safety of the detachable fan blades. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of the present invention.

[0021] Figure 2 It is a schematic diagram of the cross-sectional structure of the blade body in the present invention.

[0022] Figure 3 Schematic diagram of the structure of the fan in the present invention.

[0023] Figure 4 It is a schematic diagram of the partial structure of the fan in the present invention.

[0024] Figure 5 Schematic diagram of the internal structure of the casing in the present invention.

[0025] Figure 6Schematic diagram of the structure of the connection component in the present invention.

[0026] Among them: 1. Casing; 2. Outer rotor motor; 3. Hanging rod; 4. Mounting port; 5. Connecting block; 6. Fan blade; 7. Plug; 8. Gear; 9. Connecting column; 10. Push rod; 11. L-shaped pressing rod; 12. Drive motor; 13. Motor frame; 14. Lifting block; 15. Threaded rod; 16. Limiting slide bar; 17. Rack; 18. First spring; 19. Locking rod; 20. Locking block; 21. Locking hole; 22. Second spring; 23. U-shaped groove; 24. Plug-in hole; 25. Locking groove; 27. Connecting hole; 28. Rectangular slide; 29. ​​Connecting seat; 30. Handle block.

[0027] 61. Blade body; 62. Blade connecting block; 611. Engineering plastic layer; 612. Cemented carbide skeleton. DETAILED DESCRIPTION

[0028] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0029] See also Figures 1-6 In an embodiment of the present invention, a fan blade structure includes a blade body 61, one end of the blade body 61 is fixedly connected to a blade connecting block 62, the blade connecting block 62 is conical, and the thickness of the blade connecting block 62 increases from the blade body 61 to the blade connecting block 62; the blade body 61 includes a carbide skeleton 612 and an engineering plastic layer 611, the engineering plastic layer 611 is distributed on both sides of the carbide skeleton 612, and the engineering plastic layer 611 and the carbide skeleton 612 are connected as a whole using a composite process; by setting the conical blade connecting block 62, the strength of the connection part can be effectively improved. At the same time, the blade body 61 is made of a composite of the carbide skeleton 612 and the engineering plastic layer 611, which has high strength and deformation resistance, reduces the deformation of the fan blade under high-speed rotation, and effectively improves the service life.

[0030] The fan is provided with a plurality of connecting rods 1 and 2, and a plurality of connecting rods 3 are connected to the fan shaft 1, and a plurality of connecting rods 3 are connected to the fan shaft 1.

[0031] The connecting assembly includes a plug 7, which is fixed to the connecting end of the fan blade 6. A U-shaped groove 23 is provided on both sides of the plug 7. One end of the U-shaped groove 23 is slidably connected to a locking block 20. The other end of the U-shaped groove 23 is slidably connected to an L-shaped pressing rod 11. One end of the L-shaped pressing rod 11 is fixedly connected to the locking block 20. A second spring 22 is installed between the inner end surface of the U-shaped groove 23 and the L-shaped pressing rod 11. The end of the connecting block 5 away from the housing 1 is provided with a spring that matches the plug 7. The plug-in hole 24 has locking grooves 25 on both sides of the plug-in hole 24 that match the locking block 20. The connecting block 5 is provided with a locking assembly for locking the locking block 20. When connecting, the locking block 20 is retracted into the U-shaped groove 23 by pressing the L-shaped pressing rod 11, and then the plug 7 is inserted into the plug-in hole 24. After insertion, the L-shaped pressing rod 11 is released, and the locking block 20 pops out and is stuck in the locking groove 25 under the action of the spring, and then the locking block 20 is locked by the locking assembly to achieve the installation of the fan blade 6.

[0032] The locking assembly includes a rectangular slot 28, which is opened at a position of the connecting block 5 near the gear 8, and a connecting hole 27 is opened on both sides of the rectangular slot 28 to communicate with the locking slot 25, and a locking rod 19 is slidably connected in the connecting hole 27. A detent 10 is fixedly connected between the ends of the two locking rods 19 away from the plug 7, and the detent 10 is slidably connected to the inside of the rectangular slot 28. A first spring 18 is installed between the two ends of the detent 10 away from the locking rod 19 and the inner end surface of the rectangular slot 28, and a locking hole 21 matching the locking rod 19 is opened on the locking block 20; the two ends of the detent 10 are fixedly connected to the handle block 30. When the fan blade 6 is installed, the detent 10 is first pushed to slide in the direction of the casing 1 so that the locking rod 19 exits the locking slot 25. After the locking block 20 enters the locking slot 25, the detent 10 is released, and the locking rod 19 is inserted into the locking hole 21 under the action of the first spring 18 to lock the locking block 20.

[0033] The connecting block 5 is fixedly connected to the gear 8 at one end close to the interior of the casing 1, and a driving component for driving the gear 8 to rotate is provided inside the casing 1; the driving component includes a lifting block 14, which is provided in the middle of the lower end of the interior of the casing 1, and a rack 17 is installed in the middle of the four faces of the lifting block 14, and the rack 17 is respectively engaged with the gear 8, and the four corners of the lifting block 14 are slidably connected to the limiting slide bar 16, and the lower end of the limiting slide bar 16 is fixedly connected to the lower end of the interior of the casing 1, and a lifting component for driving the lifting block 14 to move up and down is provided inside the casing 1; when working, the lifting component drives the lifting block 14 to rise and fall, and the lifting of the lifting block 14 can drive the rack 17 to move synchronously, and the movement of the rack 17 can drive the gear 8 to rotate accordingly, so that the pitch angle of the fan blade 6 can be freely adjusted during use.

[0034] The lifting assembly includes a drive motor 12, which is arranged at a position above the lifting block 14 inside the casing 1. Several motor frames 13 are fixedly connected to the casing of the drive motor 12. The end of the motor frame 13 away from the drive motor 12 is fixedly connected to the inner wall of the casing 1. The output end of the drive motor 12 is fixedly connected to a threaded rod 15. The lower end of the threaded rod 15 is rotatably connected to the lower end surface of the casing 1. The threaded rod 15 is threadedly connected to the lifting block 14, and the upper end of the limit slide 16 is fixedly connected to the casing of the drive motor 12; the casing of the drive motor 12 and the lower end surface of the casing 1 are both provided with limit switches that cooperate with the lifting block 14; when working, the drive motor 12 drives the threaded rod 15 to rotate, and the rotation of the threaded rod 15 can drive the lifting block 14 to move up and down. The up and down movement of the lifting block 14 can drive the rack 17 to operate, and the set limit slide 16 can limit the lifting block 14 to ensure the stability of the up and down movement of the lifting block 14 and prevent the lifting block 14 from deflecting.

[0035] The working principle of the present invention is: when in use, the suspension rod 3 can be easily installed through the provided connecting seat 29 and the mounting hole provided on the connecting seat 29. During operation, the outer rotor motor 2 drives the casing 1 to rotate, and the rotation of the casing 1 can drive the fan blades 6 to rotate to achieve a blowing effect. When the pitch angle of the fan blades 6 needs to be adjusted, the driving motor 12 drives the threaded rod 15 to rotate, and the rotation of the threaded rod 15 can drive the lifting block 14 to move up and down. The lifting and lowering of the lifting block 14 can drive the rack 17 to move synchronously, and the movement of the rack 17 can drive the gear 8 to rotate accordingly, thereby freely adjusting the pitch angle of the fan blades 6 during use.

[0036] When the fan blade 6 needs to be removed, first slide the lever 10 toward the housing 1 so that the locking rod 19 is pulled out of the lock hole 21 to release the lock block 20, then press the L-shaped pressing rod 11 to disengage the lock block 20 from the lock groove 25, and then pull the plug 7 out of the plug hole 24. When installing, first push the lever 10 toward the housing 1 to slide so that the locking rod 19 is out of the lock groove 25, then press the L-shaped pressing rod 11 to retract the lock block 20 into the U-shaped groove 23, and then insert the plug 7 into the plug hole 24. After that, the L-shaped pressing rod 11 is released, and the locking block 20 pops out and is stuck in the locking groove 25 under the action of the spring. After the locking block 20 enters the locking groove 25, the lever 10 is released, and the locking rod 19 is inserted into the locking hole 21 under the action of the first spring 18 to lock the locking block 20. When the fan is running, the fan blades 6 rotate at high speed, which will cause the lever 10 and the locking rod 19 to generate centrifugal force, so that the lever 10 is always subjected to a force in the direction of the locking block 20, so that a double protection is formed with the first spring 18, which greatly improves the safety of the detachable fan blades 6.

[0037] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Although this specification describes the embodiments, not every embodiment contains only one technical solution. This description is for clarity only. Those skilled in the art should read the specification as a whole. The technical solutions in the various embodiments can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A fan, comprising a housing (1), an outer rotor motor (2) and a fan blade (6), wherein the fan blade (6) comprises a blade body (61), one end of the blade body (61) is fixedly connected to a blade connection block (62), the blade connection block (62) is tapered, and the thickness of the blade connection block (62) gradually increases from the blade body (61) to the blade connection block (62); It is characterized in that The outer rotor motor (2) is arranged at the upper end of the casing (1), the outer shell of the outer rotor motor (2) is fixedly connected to the casing (1), a suspension rod (3) is fixedly connected to the connecting end of the outer rotor motor (2), four mounting openings (4) are opened at the lower end of the casing (1), and the four mounting openings (4) are evenly distributed. A connecting block (5) is provided inside the mounting opening (4), and connecting columns (9) are fixedly connected to both sides of the connecting block (5). The connecting column (9) is rotatably connected to the mounting opening (4), and a connecting component for connecting the fan blade (6) is provided on the connecting block (5); One end of the connecting block (5) close to the interior of the housing (1) is fixedly connected to a gear (8), and a driving assembly for driving the gear (8) to rotate is provided inside the housing (1); The connecting assembly includes a plug (7), the plug (7) is fixed on the connecting end of the fan blade (6), U-shaped grooves (23) are provided on both sides of the plug (7), one end of the U-shaped groove (23) is slidably connected to a locking block (20), the other end of the U-shaped groove (23) is slidably connected to an L-shaped pressing rod (11), one end of the L-shaped pressing rod (11) is fixedly connected to the locking block (20), a second spring (22) is installed between the inner end surface of the U-shaped groove (23) and the L-shaped pressing rod (11), the end of the connecting block (5) away from the housing (1) is provided with a plug hole (24) matching the plug (7), and locking grooves (25) matching the locking block (20) are provided on both sides of the plug hole (24), and a locking assembly for locking the locking block (20) is provided on the connecting block (5); The locking assembly includes a rectangular slot (28), the rectangular slot (28) being provided at a position of the connecting block (5) near the gear (8), and connecting holes (27) communicating with the locking slot (25) being provided on both sides of the rectangular slot (28), and locking rods (19) being slidably connected in the connecting holes (27), and a shifting rod (10) being fixedly connected between the ends of the two locking rods (19) away from the plug (7), and the shifting rod (10) being slidably connected in the rectangular slot (28), and a first spring (18) being installed between the two ends of the side of the shifting rod (10) away from the locking rod (19) and the inner end surface of the rectangular slot (28), and a locking hole (21) matching the locking rod (19) is provided on the locking block (20).

2. A fan according to claim 1, characterized in that: The blade body (61) comprises a hard alloy skeleton (612) and an engineering plastic layer (611), wherein the engineering plastic layer (611) is distributed on both sides of the hard alloy skeleton (612), and the engineering plastic layer (611) and the hard alloy skeleton (612) are connected into one body using a composite process.

3. The fan according to claim 1, characterized in that: Both ends of the shifting rod (10) are fixedly connected to handle blocks (30).

4. The fan according to claim 1, characterized in that: The driving assembly includes a lifting block (14), the lifting block (14) is arranged in the middle of the lower end of the housing (1), and racks (17) are installed in the middle of the four faces of the lifting block (14), and the racks (17) are respectively engaged with the gears (8). The four corners of the lifting block (14) are slidably connected to the limiting slide rods (16), and the lower ends of the limiting slide rods (16) are fixedly connected to the lower end of the housing (1). The housing (1) is provided with a lifting assembly for driving the lifting block (14) to move up and down.

5. A fan according to claim 4, characterized in that: The lifting assembly includes a drive motor (12), the drive motor (12) is arranged inside the casing (1) at a position above the lifting block (14), a plurality of motor frames (13) are fixedly connected to the casing of the drive motor (12), one end of the motor frame (13) away from the drive motor (12) is fixedly connected to the inner wall of the casing (1), the output end of the drive motor (12) is fixedly connected to a threaded rod (15), the lower end of the threaded rod (15) is rotatably connected to the lower end surface of the casing (1), the threaded rod (15) is threadedly connected to the lifting block (14), and the upper end of the limit slide rod (16) is fixedly connected to the casing of the drive motor (12).

6. A fan according to claim 5, characterized in that: The drive motor (12) housing and the lower end surface of the housing (1) are both provided with limit switches that cooperate with the lifting block (14).

7. A fan according to claim 6, characterized in that: One end of the suspension rod (3) away from the outer rotor motor (2) is fixedly connected to a connecting seat (29), and a plurality of mounting holes are provided on the connecting seat (29).

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