A fan motor for umbrellas

Abstract

This application discloses an umbrella motor fan, belonging to the technical field of umbrella accessories. The fan includes a rotor assembly, a stator assembly, and multiple fan blades. The shaft of the stator assembly passes through and is fixed to the central hole of the stator core, and a circuit control board is sleeved on the shaft. Winding teeth on the periphery of the stator core are wound with coils and electrically connected to the circuit control board. Lead wires pass through holes in the side wall of the hollow shaft and connect to the circuit control board. A permanent magnet ring is built into the outer shell of the rotor assembly, and the stator core is located in the inner hole of the permanent magnet ring. The shaft passes through the bottom opening of the outer shell and the top cover assembly to form a rotatable connection. The fan blades are hinged to the periphery of the top cover assembly and can swing up and down along the shaft. In this application, the shaft serves as the umbrella shaft, and the umbrella shaft and fan are integrated, resulting in a smaller volume. Furthermore, the fan blades are foldable, minimizing the impact of the fan on the overall size of the umbrella when it is closed, making it easy to carry.

Description

Technical Field

[0001] This application relates to the technical field of umbrella development, and more specifically, it relates to an umbrella motor fan. Background Technology

[0002] Umbrellas are common household items used to protect against rain and sun. However, in hot and humid environments, the inside of an umbrella can feel stuffy and humid, causing users to experience unbearable heat. To improve comfort, umbrellas with integrated fans have appeared on the market.

[0003] In related technologies, such as the umbrella fan holder disclosed in application number CN202022886225.5, the fan is installed in the middle section of the umbrella shaft via a clamp or holding structure. This design separates the umbrella shaft from the fan, and the fan and holder together occupy a large amount of space, increasing the overall size of the umbrella when it is closed, making it inconvenient to carry. Utility Model Content

[0004] To address the problem in related technologies where the fan is mounted on the umbrella shaft using clamps or clips, which increases the overall size of the umbrella when it is closed and makes it inconvenient to carry, this application provides a motor fan for umbrellas.

[0005] An umbrella-type electric fan includes a rotor assembly, a stator assembly, and fan blades. The stator assembly includes a shaft, a stator core, a coil, a circuit control board, and leads. The stator core has a central hole, through which the shaft passes and is fixedly connected. The circuit control board has a through hole and is fitted onto the shaft. The stator core has multiple winding teeth evenly arranged around its center, each winding tooth having a coil wound around it. The circuit control board is electrically connected to the coil. The shaft is hollow and has a through hole on its side. The leads pass through the hollow shaft and through the through hole, electrically connecting to the circuit control board. The rotor assembly... The device includes a permanent magnet ring, an outer casing, and a top cover assembly. The outer casing has an opening at its top and a base plate integrally formed at its bottom. The base plate has an opening in the middle. The permanent magnet ring is disposed inside the outer casing and is connected and fixed to it. The stator core is disposed in the inner hole of the permanent magnet ring. The shaft passes through the opening in the base plate and exits the outer casing. The outer casing and the shaft are rotatably connected. The top cover assembly is fixed to the top of the outer casing and closes the opening. The shaft passes through the top cover assembly and is rotatably connected to it. There are multiple fan blades, which are evenly arranged around the top cover assembly and hinged to it to swing up and down along the length of the shaft.

[0006] Preferably, the fan blade includes a fan blade body and a bent rod integrally disposed at the rear end of the fan blade body. The bent rod has a bending angle of 90°. A hinge shaft is integrally disposed at the bottom end of the bent rod. The two ends of the hinge shaft protrude from opposite sides of the bent rod. The top cover assembly includes a shell end cover and a fan blade mounting cover. The shell end cover partially passes through the opening of the outer shell sleeve and is connected and fixed to the outer shell sleeve. The top edge of the shell end cover is recessed with a plurality of first receiving grooves. The plurality of first receiving grooves are arranged around the shaft. The number of first receiving grooves is equal to the number of fan blades. Similarly, the hinge shaft is placed in the first receiving groove, and the bottom surface of the fan blade mounting cover is recessed with a second receiving groove. The number of second receiving grooves is equal to the number of first receiving grooves. The fan blade mounting cover is fixed to the top of the shell end cover, and each second receiving groove has a first receiving groove aligned with it. Each group of first receiving grooves and second receiving grooves forms a cavity for the hinge shaft to rotate. The fan blade mounting cover has a slot at the center of each aligned second receiving groove on its periphery. The slot is used to avoid the bent rod.

[0007] Preferably, the fan blade mounting cover and the shell end cover are fixed together by bolts.

[0008] Preferably, a first bearing is provided between the outer casing and the shaft, and the outer casing is connected and fixed to the outer ring of the first bearing, and the shaft passes through the inner ring of the first bearing and is tightly fitted to the first bearing.

[0009] Preferably, a second bearing is provided between the top cover assembly and the shaft, and the top cover assembly is connected and fixed to the outer ring of the second bearing, and the shaft passes through the inner ring of the second bearing and is tightly fitted to the second bearing.

[0010] Preferably, the stator core has an injection molded part fixed at the top of each winding tooth, and a tin-plated needle is fixed at the top of the injection molded part. The coil is also wound on the tin-plated needle. The circuit control board is provided with a number of pads matching the number of tin-plated needles. Each pad is soldered to one tin-plated needle to electrically connect the coil to the circuit control board.

[0011] The beneficial technical effects of this application are as follows: The shaft is used as the umbrella pole, and the pole is inserted through the middle of the stator core and fixed to it. This allows the fan to be vertically mounted on the pole. Lead wires connect the circuit control board to an external power supply. The circuit control board controls the rotation of the rotor assembly. When powered on, the rotor assembly rotates, driving the fan blades to generate airflow. The fan is vertically mounted on the pole, with the pole positioned in the middle of the fan and integrated with it. The fan blades are hinged to the top cover assembly, allowing for folding and a downward-hanging design when not in motion. This effectively reduces the overall volume of the umbrella when closed, making it easy to carry. Furthermore, the rotating fan blades are less likely to collide with the pole, eliminating safety hazards. The generated airflow is directed vertically downwards towards the person under the umbrella, significantly improving wind efficiency and cooling effect. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall result of a motor fan for a sunshade umbrella according to this embodiment.

[0013] Figure 2 This is an exploded view of a motor fan for a sunshade according to this embodiment.

[0014] Figure 3 This is an exploded view of the connection structure between the top cover and the fan blades in this embodiment.

[0015] Figure 4 This is a schematic diagram of the outer casing of this embodiment.

[0016] Reference numerals: 1. Rotor assembly; 11. Permanent magnet ring; 12. Outer shell; 121. Opening; 122. Base plate; 123. Protrusion; 124. First annular groove; 125. Opening; 13. Top cover assembly; 131. Shell end cover; 1311. First receiving groove; 1312. Clearance hole; 1313. Second annular groove; 132. Fan blade mounting cover; 1321. Second receiving groove; 1322. Slot; 2. Stator assembly; 21. Shaft; 211. Through hole; 22. Stator core; 221. Central hole; 222. Winding tooth; 23. Coil; 24. Circuit control board; 241. Through hole; 25. Lead wire; 3. Fan blade; 31. Fan blade body; 32. Bent rod; 33. Hinge shaft; 4. First bearing; 5. Second bearing. Detailed Implementation

[0017] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0018] Reference Figure 1 and Figure 2 An umbrella motor fan includes a rotor assembly 1, a stator assembly 2, and fan blades 3. The stator assembly 2 includes a shaft 21, a stator core 22, a coil 23, a circuit control board 24, and leads 25. The stator core 22 has a central hole 221 in the middle, and the shaft 21 passes through the central hole 221. The shaft 21 is connected and fixed to the stator core 22 by anaerobic adhesive. The circuit control board 24 has a through hole 241 and is sleeved on the shaft 21 through the through hole 241. The circuit control board 24 is a PCBA.

[0019] Reference Figure 2 The stator core 22 has multiple winding teeth 222 evenly arranged around its center. Each winding tooth 222 is wound with a coil 23, and each winding tooth 222 has a molded part (not shown in the figure) fixed to its top. A tin-plated needle is fixed to the top of the molded part, and the coil 23 is also wound on the tin-plated needle. The circuit control board 24 has a number of pads matching the number of tin-plated needles. Each pad is soldered to a tin-plated needle to electrically connect the coil to the circuit control board and fix the circuit control board 24 to the stator core 22. The winding teeth 222 and the coil 23 are electrically connected to the circuit control board 24, and the circuit control board 24 controls the on and off of the coil 23. In another embodiment, the circuit control board 24 can also be fixed to the shaft 21 with insulating glue, and the coil 23 is directly soldered to the circuit control board 24 to fix the circuit control board 24 and realize the electrical connection between the circuit control board 24 and the coil 23.

[0020] Reference Figure 2 The shaft 21 is hollow and has a through hole 211 on its side. The through hole 211 is located on the side of the circuit control board 24 away from the stator core 22. The lead wire 25 passes through the hollow interior of the shaft 21 and comes out through the through hole 211 to connect to the circuit control board 24. The lead wire 25 is used to connect to external devices to supply power to the circuit control board 24.

[0021] Reference Figure 2 and Figure 4The rotor assembly 1 includes a permanent magnet ring 11, an outer casing 12, and a top cover assembly 13. The outer casing 12 is cylindrical, with an opening 121 at the top and a bottom plate 122 integrally formed at the bottom. The bottom plate 122 has a protruding part 123, which has a first annular groove 124 communicating with the inside of the outer casing 12. The bottom end of the protruding part 123 has an opening 125 at the center of the corresponding first annular groove 124. The outer casing 12 is made of plastic. The permanent magnet ring 11 is press-fitted into the outer casing 12 through the opening 121 at the top of the outer casing 12, thus fixing the permanent magnet ring 11 to the outer casing 12. The stator core 22 passes through the permanent magnet ring 11. The shaft 21 passes through the central hole 221 of the outer casing 12 and exits the outer casing 12. A first bearing 4 is provided between the shaft 21 and the outer casing 12. The first bearing 4 is pressed into the first annular groove 124 to fix the outer ring of the first bearing 4 to the outer casing 12. The shaft 21 passes into the inner hole of the first bearing 4 and is pressed into the inner ring of the first bearing 4 to fix the inner ring of the first bearing 4 to the shaft 21. The first bearing 4 supports the rotational connection between the shaft 21 and the outer casing 12. The coil 23 is energized and cooperates with the permanent magnet ring 11 to drive the permanent magnet ring 11 to drive the outer casing 12 to rotate around the shaft 21.

[0022] Reference Figure 1 , Figure 2 and Figure 3The top cover assembly 13 includes a shell end cover 131 and a fan blade mounting cover 132. The bottom of the shell end cover 131 is circular, and the circular bottom of the shell end cover 131 passes through the opening 121 of the outer shell sleeve 12 and is connected and fixed to the inner wall of the outer shell sleeve 12 by glue. The top edge of the shell end cover 131 is recessed with three first receiving grooves 1311, which are arranged around the shaft 21. There are three fan blades 3, and each fan blade 3 includes a fan blade body 31 and a bent rod 32 integrally provided at the rear end of the fan blade body 31. 2. The complete angle is 90°. A hinge shaft 33 is integrally provided at the bottom end of the bent rod 32. The two ends of the hinge shaft 33 protrude from the opposite sides of the bent rod 32. Each first receiving groove 1311 corresponds to the installation of one fan blade 3. The hinge shaft 33 of the fan blade 3 is placed in the first receiving groove 1311. The bottom surface of the fan blade mounting cover 132 is recessed with a second receiving groove 1321. The number of second receiving grooves 1321 is equal to the number of first receiving grooves 1311. The fan blade mounting cover 132 is fixed to the top of the shell end cover 131 by bolts. Each end cap 131 has a clearance hole 1312 in the middle for the shaft 21 to pass through. The bottom surface of the end cap 131 also has a second annular groove 1313 recessed at the position corresponding to the clearance hole 1312. A second bearing 5 is provided between the shaft 21 and the end cap 131. The second bearing 5 is press-fitted into the second annular groove 1313, and its outer ring is fixed to the end cap 131. The shaft 21 is press-fitted into the inner hole of the second bearing 5 and fixed to its inner ring. Each second receiving groove 1321 has a first receiving groove 1311 corresponding to it. Each set of first... Both the receiving groove 1311 and the second receiving groove 1321 form a cavity for the hinge shaft 33 to rotate and restrict the movement and deviation of the hinge shaft 33. The fan blade mounting cover 132 has a slot 1322 in the middle of each second receiving groove 1321 around its periphery. The slot 1322 is used to avoid the bent rod 32. The fan blade 3 can swing up and down along the length of the shaft 21 with the hinge shaft 33 rotating in the cavity. The bent rod 32 of the fan blade 3 abuts against the bottom wall of the slot 1322 to make the fan blade 3 perpendicular to the shaft 21.

[0023] The implementation principle of the umbrella motor fan of this application is as follows: the shaft 21 serves as the umbrella shaft, and is connected to an external power supply device through the lead wire 25. The circuit control board 24 controls the coil 23 to be energized, so that the stator core 22 cooperates with the permanent magnet ring 11, causing the permanent magnet ring 11 to drive the outer shell 12 and the top cover assembly 13 to rotate. Through the rotation of the outer shell 12 and the top cover assembly 13, the fan blades 3 open from the hanging state through centrifugal force, are perpendicular to the shaft 21, and rotate to generate airflow. The airflow blows towards the people under the umbrella, achieving a cooling effect. In this application, the umbrella shaft is placed in the middle of the fan and is integrated with the fan. The fan blades 3 are hinged to the top cover assembly 13, which allows for folding and hanging down when not in motion, effectively reducing the overall volume of the umbrella when the canopy is closed, making it easy to carry. At the same time, the fan blades 3 are less likely to collide with the umbrella shaft when rotating, eliminating safety hazards. The airflow can blow vertically downwards towards the people under the umbrella, significantly improving the utilization efficiency of wind power and the cooling effect.

[0024] Although embodiments of this application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A motorized fan for umbrellas, characterized in that: The system includes a rotor assembly, a stator assembly, and fan blades. The stator assembly includes a shaft, a stator core, coils, a circuit control board, and leads. The stator core has a central hole, through which the shaft passes and is fixedly connected. The circuit control board has a through hole and is fitted onto the shaft. The stator core has multiple winding teeth evenly arranged around its center, each winding tooth having a coil wound around it. The circuit control board is electrically connected to the coils. The shaft is hollow and has a through hole on its side. The leads pass through the hollow shaft and through the through hole, electrically connecting to the circuit control board. The rotor assembly includes a permanent magnet ring. The system comprises an outer casing and a top cover assembly. The outer casing has an opening at the top and a base plate integrally formed at the bottom. The base plate has an opening in the middle. A permanent magnet ring is disposed inside the outer casing and is connected and fixed to it. The stator core is disposed in the inner hole of the permanent magnet ring. A shaft passes through the opening in the base plate and exits the outer casing. The outer casing and the shaft are rotatably connected. The top cover assembly is fixed to the top of the outer casing and closes the opening. The shaft passes through the top cover assembly and is rotatably connected to it. The system has multiple fan blades, which are evenly arranged around the top cover assembly and hinged to it to swing up and down along the length of the shaft.

2. The umbrella motor fan according to claim 1, characterized in that: The fan blade includes a fan blade body and a bent rod integrally disposed at the rear end of the fan blade body. The bent rod has a bending angle of 90°. A hinge shaft is integrally disposed at the bottom end of the bent rod, and the two ends of the hinge shaft protrude from opposite sides of the bent rod. The top cover assembly includes a shell end cover and a fan blade mounting cover. The shell end cover partially passes through the opening of the outer shell sleeve and is connected and fixed to the outer shell sleeve. The top edge of the shell end cover is recessed with a plurality of first receiving grooves, which are arranged around the shaft. The number of first receiving grooves is the same as the number of fan blades. The hinge shaft is placed in the first receiving groove, and the bottom surface of the fan blade mounting cover is recessed with a second receiving groove. The number of second receiving grooves is equal to the number of first receiving grooves. The fan blade mounting cover is fixed to the top of the shell end cover, and each second receiving groove has a first receiving groove aligned with it. Each group of first receiving grooves and second receiving grooves forms a cavity for the hinge shaft to rotate. The fan blade mounting cover has a slot at the center of each aligned second receiving groove on its periphery. The slot is used to avoid the bent rod.

3. The umbrella motor fan according to claim 2, characterized in that: The fan blade mounting cover and the shell end cover are fixed together by bolts.

4. The umbrella motor fan according to claim 1, characterized in that: A first bearing is provided between the outer casing and the shaft, and the outer casing is fixedly connected to the outer ring of the first bearing. The shaft passes through the inner ring of the first bearing and is tightly fitted to the first bearing.

5. A motor fan for umbrellas according to claim 1, characterized in that: A second bearing is provided between the top cover assembly and the shaft, and the top cover assembly is connected and fixed to the outer ring of the second bearing. The shaft passes through the inner ring of the second bearing and is tightly fitted to the second bearing.

6. A motor fan for umbrellas according to claim 1, characterized in that: The stator core has an injection molded part fixed at the top of each winding tooth, and a tin-plated needle is fixed at the top of the injection molded part. The coil is also wound on the tin-plated needle. The circuit control board is provided with a number of pads matching the number of tin-plated needles. Each pad is soldered to a tin-plated needle to electrically connect the coil to the circuit control board.

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