Fan blade structure and fan using same

Abstract

The invention discloses a fan blade structure and a fan using the fan blade structure, and relates to the technical field of fans, the fan blade structure comprises a blade main body, one end of the blade main body is fixedly connected with a blade connecting block, the blade connecting block is conical, and the thickness of the blade connecting block is gradually increased from the blade main body to the blade connecting block; the blade body comprises a hard alloy framework and engineering plastic layers, the engineering plastic layers are distributed on the two sides of the hard alloy framework, and the engineering plastic layers and the hard alloy framework are connected into a whole through a composite technology. According to the fan blade, the conical blade connecting blocks are arranged, the strength of the connecting part can be effectively improved, meanwhile, the blade body is formed by compounding the hard alloy framework and the engineering plastic layer, high strength and deformation resistance are achieved, the deformation quantity of the fan blade under high-speed rotation is reduced, and the service life is effectively prolonged.

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 fan blade structure. 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 and generates 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 can remove the fan blades by using a detachable structure, which is convenient for cleaning or replacing the fan blades. However, when the fan is used, the fan blades have a fixed angle and the size of the wind field generated by the fan cannot be changed according to needs when it is used. The flexibility of use is low. At the same time, the 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 is not a reliable connection, and the risk of the fan blades detaching is relatively high. In response to the above problems, we provide a fan blade structure and a fan using the fan blade structure. Summary of the invention

[0004] The object of the present invention is to provide a fan blade structure and a fan using the fan blade structure 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 comprises 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 cemented carbide skeleton and an engineering plastic layer, the engineering plastic layer is distributed on both sides of the cemented carbide skeleton, and the engineering plastic layer and the cemented carbide skeleton are connected as a whole 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, four mounting openings are opened at the lower end of the casing, the four mounting openings are evenly distributed, connecting blocks are arranged 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 fan blades is arranged on the connecting block;

[0009] One end of the connecting block close to the inside of the casing is fixedly connected with a gear, and a driving component for driving the gear to rotate is arranged inside the casing.

[0010] As a further solution of the present invention: the connecting component 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, a locking block is slidably connected to one end of the U-shaped groove, and an L-shaped pressing rod is slidably connected to the other end of the U-shaped groove, 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, an insertion hole matching the plug is provided at the end of the connecting block away from the casing, and locking grooves matching the locking block are provided on both sides of the insertion hole, and a locking component for locking the locking block is provided on the connecting block.

[0011] As a further solution of the present invention: the locking assembly includes a rectangular slide groove, which is arranged at a position of the connecting block close to the gear, and connecting holes connected to the locking groove are arranged on both sides of the rectangular slide groove, and locking rods are slidably connected in the connecting holes, and a lever is fixedly connected between the ends of the two locking rods away from the plug, and the lever is slidably connected inside the rectangular slide groove, and a first spring is installed between the two ends of the lever away from the locking rod and the inner end surface of the rectangular slide groove, and a locking hole matching the locking rod is arranged on the locking 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 casing, and racks are installed in the middle of the four faces 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 bars, and the lower ends of the limit slide bars are fixedly connected to the lower end 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. A plurality of motor frames are fixedly connected to the casing of the driving motor, and one end of the motor frame away from the driving motor is fixedly connected to the inner wall of the casing. A threaded rod is fixedly connected to the output end of the driving motor, and 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 casing of the driving motor.

[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 connection block. At the same time, the blade body is made of a composite of a hard alloy 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 drive component set, and then adjust the size of the wind field generated according to usage requirements. At the same time, the locking component set can lock the locking block after the fan blades are connected to avoid 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 lever and the locking rod will generate centrifugal force, so that the lever is always subjected to a force in the direction of the locking block, thereby forming a double protection with the first spring, greatly improving the safety of the detachable fan blades. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0025] Figure 6It is a schematic 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 blades; 7. Plug; 8. Gear; 9. Connecting column; 10. Push rod; 11. L-shaped pressing rod; 12. Driving motor; 13. Motor frame; 14. Lifting block; 15. Threaded rod; 16. Limiting slide rod; 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 groove; 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 be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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 creative work are within the scope of protection of the present invention.

[0029] See also Figure 1-Figure 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 cemented carbide skeleton 612 and an engineering plastic layer 611, the engineering plastic layer 611 is distributed on both sides of the cemented carbide skeleton 612, and the engineering plastic layer 611 and the cemented carbide skeleton 612 are connected as a whole by a composite process; by setting the conical blade connecting block 62, the strength of the connection part can be effectively improved, and at the same time, the blade body 61 is made of a composite of the cemented 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] A fan comprises a casing 1, an outer rotor motor 2 and the above-mentioned fan blade structure, wherein the outer rotor motor 2 is arranged at the upper end of the casing 1, the outer rotor motor 2 shell is fixedly connected to the casing 1, a suspension rod 3 is fixedly connected to the connecting end of the outer rotor motor 2, the casing 1 is provided with four mounting openings 4 at the lower end, and the four mounting openings 4 are evenly distributed, a connecting block 5 is provided inside the mounting opening 4, both sides of the connecting block 5 are fixedly connected with a connecting column 9, the connecting column 9 is rotatably connected to the mounting opening 4, and a connecting assembly for connecting the fan blade 6 is provided on the connecting block 5; an 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; the suspension rod 3 can be easily installed by the provided connecting seat 29 and the mounting holes provided on the connecting seat 29, and the outer rotor motor 2 drives the casing 1 to rotate during operation, and the rotation of the casing 1 can drive the fan blade 6 to rotate, and the rotation of the fan blade 6 can drive air circulation to generate a wind field below to achieve a blowing effect.

[0031] The connecting assembly includes a plug 7, which is fixed on the connecting end of the fan blade 6. U-shaped grooves 23 are provided on both sides of the plug 7. A locking block 20 is slidably connected to one end of the U-shaped groove 23. An L-shaped pressing rod 11 is slidably connected to the other end of the U-shaped groove 23. 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. 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 arranged at a position of the connecting block 5 close to the gear 8. Both sides of the rectangular slot 28 are provided with connecting holes 27 connected to the locking slot 25. Lock rods 19 are slidably connected in the connecting holes 27. A lever 10 is fixedly connected between the ends of the two locking rods 19 away from the plug 7. The lever 10 is slidably connected inside the rectangular slot 28. A first spring 18 is installed between the two ends of the lever 10 away from the locking rod 19 and the inner end surface of the rectangular slot 28. A locking hole 21 matching the locking rod 19 is arranged on the locking block 20; both ends of the lever 10 are fixedly connected with a handle block 30. When the fan blade 6 is installed, the lever 10 is first pushed to slide in the direction of the casing 1 so that the locking rod 19 withdraws from the locking slot 25. After the locking block 20 enters the locking slot 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.

[0033] The connecting block 5 is fixedly connected to a gear 8 at one end close to the inside 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 arranged in the middle of the lower end of the casing 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, and the four corners of the lifting block 14 are slidably connected to the limiting slide rod 16, and the lower ends of the limiting slide rods 16 are fixedly connected to the lower end 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 driving motor 12, which is arranged in a position above the lifting block 14 inside the casing 1. A plurality of motor frames 13 are fixedly connected to the casing of the driving motor 12. One end of the motor frame 13 away from the driving motor 12 is fixedly connected to the inner wall of the casing 1. A threaded rod 15 is fixedly connected to the output end of the driving motor 12. 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. The upper end of the limit slide bar 16 is fixedly connected to the casing of the driving motor 12; both the casing of the driving motor 12 and the lower end surface of the casing 1 are provided with a limit switch that cooperates with the lifting block 14; during operation, 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 up and down movement of the lifting block 14 can drive the rack 17 to operate, and the set limit slide bar 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 connection seat 29 and the installation hole set on the connection seat 29. When working, 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, so that the pitch angle of the fan blades 6 can be freely adjusted during use.

[0036] When the fan blade 6 needs to be removed, the lever 10 is first slid toward the housing 1 to pull the lock rod 19 out of the lock hole 21 to release the lock block 20, and then the L-shaped pressing rod 11 is pressed to disengage the lock block 20 from the lock groove 25, and then the plug 7 is pulled out from the plug hole 24. When installing, the lever 10 is first pushed to slide toward the housing 1 to pull the lock rod 19 out of the lock groove 25, and then the L-shaped pressing rod 11 is pressed to retract the lock block 20 into the U-shaped groove 23, and then the plug 7 is inserted 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 a 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 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 above exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Although this specification is described in accordance with the implementation modes, not every implementation mode includes only one technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A fan blade structure, comprising a blade body (61), characterized in that: One end of the blade body (61) is fixedly connected to a blade connection block (62); the blade connection block (62) is conical, and the thickness of the blade connection block (62) gradually increases from the blade body (61) to the blade connection block (62).

2. A fan blade structure 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 as one body by using a composite process.

3. A fan, comprising a housing (1), an outer rotor motor (2) and a fan blade structure according to any one of claims 1 or 2, 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); the four mounting openings (4) are evenly distributed; a connecting block (5) is arranged inside the mounting opening (4); 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 arranged on the connecting block (5); One end of the connecting block (5) close to the inside of the casing (1) is fixedly connected to a gear (8), and a driving component for driving the gear (8) to rotate is provided inside the casing (1).

4. A fan according to claim 3, characterized in that: The connecting assembly comprises a plug (7), the plug (7) being fixed on the connecting end of the fan blade (6), U-shaped grooves (23) being provided on both sides of the plug (7), one end of the U-shaped groove (23) being slidably connected to a locking block (20), the other end of the U-shaped groove (23) being slidably connected to an L-shaped pressing rod (11), one end of the L-shaped pressing rod (11) being fixedly connected to the locking block (20), a second spring (22) being installed between the inner end surface of the U-shaped groove (23) and the L-shaped pressing rod (11), an inserting hole (24) matching the plug (7) being provided on one end of the connecting block (5) away from the casing (1), locking grooves (25) matching the locking block (20) being provided on both sides of the inserting hole (24), and a locking assembly for locking the locking block (20) being provided on the connecting block (5).

5. A fan according to claim 4, characterized in that: The locking assembly comprises a rectangular slide groove (28), wherein the rectangular slide groove (28) is arranged at a position of the connecting block (5) close to the gear (8), and connecting holes (27) connected to the locking groove (25) are arranged on both sides of the rectangular slide groove (28), and locking rods (19) are slidably connected in the connecting holes (27), and a lever (10) is fixedly connected between the ends of the two locking rods (19) away from the plug (7), and the lever (10) is slidably connected in the rectangular slide groove (28), and a first spring (18) is installed between the two ends of the side of the lever (10) away from the locking rod (19) and the inner end surface of the rectangular slide groove (28), and a locking hole (21) matching the locking rod (19) is arranged on the locking block (20).

6. A fan according to claim 5, characterized in that: Both ends of the lever (10) are fixedly connected with handle blocks (30).

7. A fan according to claim 3, characterized in that: The driving assembly comprises a lifting block (14), the lifting block (14) being arranged at a middle position of the lower end inside the casing (1), racks (17) being installed in the middle of four faces of the lifting block (14), the racks (17) being respectively meshed with gears (8), the four corners of the lifting block (14) being slidably connected to limit slide bars (16), the lower ends of the limit slide bars (16) being fixedly connected to the lower end inside the casing (1), and a lifting assembly for driving the lifting block (14) to move up and down is arranged inside the casing (1).

8. A fan according to claim 7, characterized in that: The lifting assembly comprises a driving motor (12), the driving motor (12) being arranged inside the casing (1) at a position above the lifting block (14), a plurality of motor frames (13) being fixedly connected to the casing of the driving motor (12), one end of the motor frame (13) away from the driving motor (12) being fixedly connected to the inner wall of the casing (1), a threaded rod (15) being fixedly connected to the output end of the driving motor (12), the lower end of the threaded rod (15) being rotatably connected to the lower end surface of the casing (1), the threaded rod (15) being threadedly connected to the lifting block (14), and the upper end of the limiting slide rod (16) being fixedly connected to the casing of the driving motor (12).

9. A fan according to claim 8, characterized in that: The outer shell of the driving motor (12) and the lower end surface of the casing (1) are both provided with limit switches that cooperate with the lifting block (14).

10. The fan according to claim 3, 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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