Circulating fan with built-in gear transmission type swing structure

Abstract

The utility model discloses a circulating fan with a built-in gear transmission type swing structure, which comprises a fan main body and a base, the fan main body is provided with a motor casing, the motor casing is hinged with a support leg, the lower end of the support leg is arranged on the base, the fan main body is provided with an up-down swing driving mechanism, and the up-down swing driving mechanism comprises a stepping motor and a swing gear. The stepping motor and the swing gear are arranged in the motor shell, the swing gear is arranged on the swing axis of the motor shell, the swing gear and the supporting foot are arranged in a circumferential positioning mode, and the stepping motor drives the swing gear to rotate. The utility model further comprises a control circuit which is in control connection with the stepping motor. The visual effect of the circulating fan can be improved, and the circulating fan can be kept clean.

Description

Technical Field

[0001] The utility model relates to the field of circulation fans, and particularly relates to a circulation fan with a built-in gear transmission type swing structure. Background Art

[0002] At present, a circulation fan is provided with a turbine fan blade. When the turbine fan blade rotates, it can output a relatively concentrated and long-range airflow. Some circulation fans have an up-and-down swing air supply function. For example, reference can be made to "A Circulation Fan with a Built-in Bracket" with the Chinese utility model patent publication number CN221003199U and "An Electric Fan with Large Angle Adjustability" with the Chinese utility model patent publication number CN206429441U. The up-and-down swing structure of the above-mentioned circulation fans is a crank (swing arm) connecting rod (pushing member) type transmission structure, and the crank and the connecting rod are externally disposed outside the motor housing (inner seat body), resulting in a messy visual effect of the external structure of the motor housing. Users can see the external structure of the above-mentioned motor housing through the air inlet cover shell, and the above-mentioned exposed transmission structure is also prone to accumulating fine sundries such as dust and hair. After the circulation fan has been used for a long time, it will have a negative impact on the visual effect of the circulation fan. Therefore, it is necessary to improve the circulation fan of the prior art. Summary of the Invention

[0003] The purpose of the utility model is to overcome the deficiencies of the prior art and provide a circulation fan with a built-in gear transmission type swing structure, which is beneficial to improving the visual effect of the circulation fan and is also beneficial to keeping the circulation fan clean.

[0004] The purpose of the utility model is achieved by the following technical solutions.

[0005] The disclosed circulation fan of the utility model includes a fan main body and a base. The fan main body is provided with a motor housing, and the motor housing is hinged with a support leg. The lower end of the support leg is installed on the base. Among them, the fan main body is provided with an up-and-down swing driving mechanism. The up-and-down swing driving mechanism includes a stepper motor and a swing gear. The stepper motor and the swing gear are arranged inside the motor housing. The swing gear is arranged on the swing axis of the motor housing. The swing gear is circumferentially positioned with the support leg, and the stepper motor drives the swing gear to rotate; it also includes a control circuit, and the control circuit is controlled and connected to the stepper motor.

[0006] Preferably, the up-and-down swing driving mechanism includes a Hall sensor. The Hall sensor is arranged inside the motor housing. A magnet for triggering the Hall sensor is arranged on the swing gear, and the control circuit is electrically connected to the Hall sensor.

[0007] Preferably, the up-and-down swing driving mechanism includes a motor gear, a reduction transition gear and a gearbox housing. The gearbox housing is installed inside the rear part of the motor housing. The motor gear and the reduction transition gear are arranged inside the gearbox housing. The reduction transition gear is rotatably connected to the gearbox housing. The stepper motor is provided with a rotating shaft, and the motor gear is installed on the rotating shaft. The reduction transition gear includes a first-stage gear and a second-stage gear. The first-stage gear is meshed with the motor gear, and the second-stage gear is meshed with the swing gear. The stepper motor is arranged outside the gearbox housing.

[0008] Preferably, a shaft head is formed on one side of the swing gear. A connecting disk is key-connected to the shaft head. The connecting disk abuts against the outer side of the motor housing. A positioning block is formed on one side of the connecting disk. The positioning block is located radially outside the shaft head. The positioning block and the shaft head are adapted to be inserted into the corresponding support feet, and the motor housing is hinged to the corresponding support feet through the connecting disk.

[0009] Preferably, the fan main body is provided with a fan blade motor. The fan blade motor is installed inside the front part of the motor housing. The fan blade motor includes a fan blade motor body and a fan blade motor circuit board. The fan blade motor circuit board is arranged in a manner of abutting against the rear side of the fan blade motor body.

[0010] Compared with the prior art, the beneficial effects of the present utility model are as follows: By providing that the fan main body is provided with an up-and-down swing driving mechanism, the up-and-down swing driving mechanism includes a stepper motor and a swing gear. The stepper motor and the swing gear are arranged inside the motor housing. The swing gear is arranged on the swing axis of the motor housing. The swing gear and the support feet are circumferentially positioned. The stepper motor drives the swing gear to rotate, and the control circuit controls the connection of the stepper motor, which is beneficial to making the outside of the motor housing simple, which is beneficial to improving the visual effect of the circulation fan, and is also beneficial to keeping the circulation fan clean; By providing that the up-and-down swing driving mechanism adopts a structure of a stepper motor driving the swing gear, it is beneficial to making the up-and-down reciprocating swing air supply function of the circulation fan richer. Description of the Drawings

[0011] Figure 1 It is a rear three-dimensional structural schematic diagram of the circulation fan of the present utility model.

[0012] Figure 2 It is a rear three-dimensional structural schematic diagram of the circulation fan of the present utility model with the air inlet housing removed.

[0013] Figure 3 It is a rear three-dimensional structural schematic diagram of the circulation fan of the present utility model with the air inlet housing and the motor housing removed.

[0014] Figure 4 It is a rear three-dimensional structural schematic diagram of the circulation fan of the present utility model with the air inlet housing and the rear cover removed.

[0015] Figure 5 This is a three-dimensional structural schematic diagram of the circulation fan of the present utility model with the base, air inlet housing, turbine fan blade and front housing removed.

[0016] Figure 6 Corresponding to Figure 5 is the cross-sectional structural schematic diagram.

[0017] Figure 7 This is a three-dimensional structural schematic diagram of the fan blade motor of the present utility model.

[0018] Figure 8 This is a three-dimensional structural schematic diagram of the up-and-down swing drive mechanism of the present utility model.

[0019] Label description: Fan main body 1; Motor housing 11; Rear cover 111; Air inlet housing 12; Front housing 13; Turbine fan blade 14; Support feet 15; Up-and-down swing drive mechanism 16; Stepper motor 161; Rotating shaft 1611; Motor gear 162; Reduction transition gear 163; First-stage gear 1631; Second-stage gear 1632; Swing gear 164; Mounting housing 1641; Shaft head 1642; Connection plate 165; Positioning block 1651; Hall sensor 166; Magnet 167; Gearbox housing 168; Fan blade motor 17; Fan blade motor body 170; Stator 1701; Fan blade motor circuit board 171; Fan blade motor tail frame 172; Support plate 18; Base 2. Detailed implementation mode

[0020] The present utility model will be further described below with reference to the accompanying drawings.

[0021] The circulation fan of the present utility model with an internal gear transmission swing structure, as shown in Figure 1 and Figure 2 shown, includes a fan main body 1 and a base 2. The fan main body 1 is provided with a motor housing 11. As shown in Figure 5 shown, the motor housing 11 is hinged with support feet 15. As shown in Figure 3 and Figure 4 shown, the lower end of the support feet 15 is installed on the base 2. In other words, the base 2 supports the motor housing 11 through the support feet 15; as shown in Figure 1 and Figure 2 shown, the fan main body 1 is further provided with an air inlet housing 12 and a front housing 13. The turbine fan blade 14 and the motor housing 11 are arranged in the space surrounded by the air inlet housing 12 and the front housing 13. The support feet 15 extend downward through the air inlet housing 12. As shown in Figure 3 shown, the fan main body 1 is provided with an up-and-down swing drive mechanism 16. As shown in Figure 8 shown, the up-and-down swing drive mechanism 16 includes a stepper motor 161 and a swing gear 164. As shown in Figure 3 , Figure 4 and Figure 8As shown, the stepper motor 161 and the swing gear 164 are arranged inside the motor housing 11. The swing gear 164 is arranged on the swing axis of the motor housing 11. In other words, the axis of the swing gear 164 and the hinge axis of the motor housing 11 and the support leg 15 are coaxially arranged. The swing gear 164 is circumferentially positioned with the support leg 15, that is to say, the swing gear 164 cannot rotate relative to the support leg 15. The stepper motor 161 drives the swing gear 164 to rotate. The circulation fan of the present utility model further includes a control circuit, and the control circuit is controllably connected to the stepper motor 161.

[0022] When the stepper motor 161 works, it can drive the swing gear 164 to rotate. Since the swing gear 164 cannot rotate relative to the support leg 15, the stepper motor 161 drives the support leg 15 to rotate around the hinge axis of the motor housing 11 and the support leg 15. However, in fact, the lower end of the support leg 15 is installed on the base 2. Therefore, in fact, the motor housing 11 rotates around the hinge axis of the motor housing 11 and the support leg 15. The turbine fan blade 14 is installed on the output shaft of the fan blade motor 17, and the fan blade motor 17 is installed inside the motor housing 11. The turbine fan blade 14 can rotate around the hinge axis of the motor housing 11 and the support leg 15. The control circuit can control the forward and reverse rotation of the stepper motor 161 through a program, so that the turbine fan blade 14 can swing up and down within a set angle range to send air, achieving the effect of increasing the air supply range. A plurality of function buttons can be arranged on the base 2. The function buttons are electrically connected to the control circuit. The swing amplitude of the motor housing 11 can be set through the function buttons. That is to say, the automatic up and down swinging air supply angle of the circulation fan is adjustable, or the angle of the motor housing 11 relative to the support leg 15 can be set (that is, to make the turbine fan blade 14 stay at the set air supply angle). Since the operation of the stepper motor 161 can be flexibly controlled by a program, it is beneficial to make the up and down swinging air supply function of the circulation fan more abundant. As Figure 1 and Figure 2 shown, since the stepper motor 161 and the swing gear 164 are arranged inside the motor housing 11, it is avoided that the up and down swing driving mechanism 16 is externally arranged outside the motor housing 11, which is beneficial to making the outside of the motor housing 11 simple. Users will not observe the messy internal structure of the circulation fan through the air inlet housing 12. Moreover, the external structure of the motor housing 11 is simple, avoiding the easy accumulation of dust, hair and other sundries. Therefore, it is beneficial to improve the visual effect of the circulation fan and is beneficial to keeping the circulation fan clean. The structure of the circulation fan of the present utility model is more concise and convenient for production and assembly.

[0023] Further, as Figure 8As shown, the up-and-down swing drive mechanism 16 includes a Hall sensor 166. The Hall sensor 166 is disposed within the motor housing 11. A magnet 167 for triggering the Hall sensor 166 is provided on the swing gear 164. Specifically, an installation housing 1641 is formed at the outer peripheral portion of the swing gear 164, and the magnet 167 can be press-fitted into the installation housing 1641. The control circuit is electrically connected to the Hall sensor 166. Thus, when the circulation fan is powered on or the user presses the up-and-down swing function button, the control circuit first controls the swing gear 164 to rotate clockwise (in Figure 8 the visual direction), such that the magnet 167 rotates to the corresponding position of the Hall sensor 166. Then, the magnet 167 triggers the Hall sensor 166, and the control circuit senses the zero position of the swing gear 164 based on the on-signal of the Hall sensor 166. In other words, the angular position at which the magnet 167 can trigger the Hall sensor 166 serves as the angular reference for the control circuit to control the swing of the swing gear 164 (relative to the motor housing 11), which is conducive to the control circuit stably controlling the swing of the swing gear 164 (relative to the motor housing 11).

[0024] Furthermore, as Figure 8 shown, the up-and-down swing drive mechanism 16 includes a motor gear 162, a reduction and transition gear 163, and a gearbox housing 168. The gearbox housing 168 is installed within the rear part of the motor housing 11 by corresponding screws. As Figure 4 shown, the side of the gearbox housing 168 having an opening covers the inner wall of the motor housing 11; as Figure 8 shown, the Hall sensor 166 is disposed on a sensor circuit board. The above-mentioned sensor circuit board is installed on the lug structure outside the gearbox housing 168 by corresponding screws. The motor gear 162 and the reduction and transition gear 163 are disposed within the gearbox housing 168. The reduction and transition gear 163 is rotatably connected to the gearbox housing 168. Specifically, one end of the reduction and transition gear 163 is rotatably connected to the gearbox housing 168, and the other end corresponding to the reduction and transition gear 163 is rotatably connected to a side wall of the motor housing 11. As Figure 8As shown, the stepping motor 161 is provided with a rotating shaft 1611. The motor gear 162 is mounted on the rotating shaft 1611. The reduction and transition gear 163 includes a first-stage gear 1631 and a second-stage gear 1632. The first-stage gear 1631 and the second-stage gear 1632 are integrally arranged coaxially. The first-stage gear 1631 is meshed with the motor gear 162, and the second-stage gear 1632 is meshed with the swing gear 164. Since the reduction and transition gear 163 has a reduction and transition effect, the number of teeth of the first-stage gear 1631 is greater than that of the motor gear 162, and the number of teeth of the swing gear 164 (the total number of teeth in a theoretical full circle) is greater than that of the second-stage gear 1632. Preferably, the number of teeth of the first-stage gear 1631 is greater than that of the second-stage gear 1632. Since the swing gear 164 does not need to swing a full circle in practical applications, the swing gear 164 can be fan-shaped, which is beneficial to reducing the volume of the swing gear 164. The swing gear 164 can be an injection-molded part. As Figure 4 and Figure 8 shown, the stepping motor 161 is arranged outside the gearbox housing 168. The outer shell of the stepping motor 161 is mounted on the outer wall of the gearbox housing 168 through corresponding screws. In other words, the rotating shaft 1611 of the stepping motor 161 penetrates into the gearbox housing 168. By setting the reduction and transition gear 163, a torque-increasing effect is achieved during the power transmission from the motor gear 162 to the swing gear 164, which is beneficial to the flexible up-and-down swing of the stepping motor 161 driving the circulation fan. As Figure 5 shown, the motor housing 11 is provided with a rear cover 111. As Figure 4 shown, before installing the rear cover 111, the gearbox housing 168 can be inserted into the motor housing 11 from the rear to the front.

[0025] Furthermore, as Figure 8 shown, a shaft head 1642 is formed on one side of the swing gear 164. That is to say, the shaft head 1642 and the swing gear 164 are integrally arranged. The shaft head 1642 is key-connected to a connection disk 165. In other words, the connection disk 165 is fitted onto the shaft head 1642. Two convex key structures are formed on the shaft head 1642, and the above convex key structures are adapted to be inserted into the key groove structure of the connection disk 165, so that the connection disk 165 cannot rotate relative to the swing gear 164. The connection disk 165 abuts against the outside of the motor housing 11. A positioning block 1651 is formed on one side of the connection disk 165, and the positioning block 1651 is located radially outside the shaft head 1642. As Figure 5As shown, the positioning block 1651 and the shaft head 1642 are adaptively inserted into the corresponding support leg 15, so that the swing gear 164 cannot rotate relative to the corresponding support leg 15. Moreover, the connecting plate 165 is disposed between the upper end of the corresponding support leg 15 and the outer wall of the motor housing 11, thereby preventing the support leg 15 made of steel from scratching the motor housing 11. The motor housing 11 is hinged to the corresponding support leg 15 through the connecting plate 165. That is to say, the motor housing 11 is formed with a hinge hole, and the hinge hole is adaptively sleeved outside the convex sleeve structure on the other corresponding side of the connecting plate 165, and the hinge hole and the shaft head 1642 are coaxial. Thus, it can also be understood that the motor housing 11 is hinged to the corresponding support leg 15 through the shaft head 1642. By providing the connecting plate 165 to form the positioning block 1651 inserted into the corresponding support leg 15, and the positioning block 1651 is located radially outside the shaft head 1642, the lever arm of the support leg 15 relative to the torque applied to the connecting plate 165 is longer, reducing the impact force received by the positioning block 1651 due to the up-and-down reciprocating swing of the circulation fan, and preventing the positioning block 1651 from being easily deformed due to the impact.

[0026] Further, as Figure 3 , Figure 5 and Figure 6 shown, the fan body 1 is provided with a fan blade motor 17. The fan blade motor 17 is installed inside the front part of the motor housing 11. The output shaft of the fan blade motor 17 extends forward outside the motor housing 11. The turbine fan blade 14 is installed on the output shaft of the fan blade motor 17. As Figure 7 shown, the fan blade motor 17 includes a fan blade motor body 170 and a fan blade motor circuit board 171. The fan blade motor 17 is an outer rotor type brushless DC motor. As Figure 6 shown, a stator 1701 is provided inside the fan blade motor body 170. The fan blade motor circuit board 171 is electrically connected to the coil of the stator 1701. The rotor of the fan blade motor body 170 and the output shaft of the fan blade motor 17 are fixedly connected relatively. The fan blade motor circuit board 171 is disposed against the rear side of the fan blade motor body 170. As Figure 6 shown, a support plate 18 is installed inside the motor housing 11 through corresponding screws. As Figure 7 shown, the fan blade motor 17 further includes a fan blade motor tail frame 172. The fan blade motor tail frame 172 is installed on the front side of the support plate 18 through corresponding screws. As Figure 6As shown, since the fan blade motor circuit board 171 is placed behind the fan blade motor body 170, it is avoided that the fan blade motor circuit board 171 is located between the turbine fan blade 14 and the fan blade motor body 170, and it is also avoided that the turbine fan blade 14 needs to be installed with a forward shift. Relatively speaking, it is beneficial to shorten the axial length setting of the fan body 1, making the appearance of the fan body 1 more compact; and it is beneficial to hide the relatively large-area fan blade motor circuit board 171 inside the motor housing 11, avoiding the need to form a relatively large housing structure at the front end of the motor housing 11 for protecting the fan blade motor circuit board 171. The Chinese utility model patent with the publication number CN219164320U discloses an "outer rotor brushless motor", and the drive board of this "outer rotor brushless motor" is a front-mounted type; while since the fan blade motor circuit board 171 of the present utility model is a rear-mounted type, the lead wires of the fan blade motor circuit board 171 are directly located inside the motor housing 11, and the above-mentioned lead wires can be conveniently routed inside the motor housing 11, avoiding the need for the above-mentioned lead wires to bypass the rotor of the fan blade motor body 170 backward to enter the inside of the motor housing 11, and avoiding the rotor touching the above-mentioned lead wires and causing potential safety hazards.

Claims

1. A circulating fan with a built-in gear transmission type swing structure, comprising a fan body (1) and a base (2), wherein the fan body (1) is provided with a motor housing (11), the motor housing (11) is hinged with a support foot (15), and the lower end of the support foot (15) is mounted on the base (2), characterized in that: The fan body (1) is provided with an up-and-down swing driving mechanism (16), the up-and-down swing driving mechanism (16) comprising a stepping motor (161) and a swing gear (164), the stepping motor (161) and the swing gear (164) being arranged in the motor housing (11), the swing gear (164) being arranged on the swing axis of the motor housing (11), the swing gear (164) being circumferentially positioned with the support foot (15), the stepping motor (161) driving the swing gear (164) to rotate; and the fan body (1) further comprises a control circuit, the control circuit being connected to the stepping motor (161) for control.

2. The circulating fan with a built-in gear transmission swing structure according to claim 1, characterized in that: The up-and-down swing driving mechanism (16) comprises a Hall sensor (166), the Hall sensor (166) being arranged in the motor housing (11), the swing gear (164) being provided with a magnet (167) for triggering the Hall sensor (166), and the control circuit being electrically connected to the Hall sensor (166).

3. The circulating fan with a built-in gear transmission swing structure according to claim 1 or 2, characterized in that: The up-and-down swing driving mechanism (16) comprises a motor gear (162), a speed reduction transition gear (163) and a gear box shell (168); the gear box shell (168) is mounted in the rear portion of the motor shell (11); the motor gear (162) and the speed reduction transition gear (163) are arranged in the gear box shell (168); the speed reduction transition gear (163) is rotatably connected to the gear box shell (168); the stepping motor (161) is provided with a rotating shaft (1611); the motor gear (162) is mounted on the rotating shaft (1611); the speed reduction transition gear (163) comprises a primary gear (1631) and a secondary gear (1632); the primary gear (1631) is meshedly connected to the motor gear (162); the secondary gear (1632) is meshedly connected to the swing gear (164); and the stepping motor (161) is arranged outside the gear box shell (168).

4. The circulating fan with a built-in gear transmission swing structure according to claim 3, characterized in that: A shaft head (1642) is formed on one side of the swing gear (164), and the shaft head (1642) is key-connected to a connecting disk (165), and the connecting disk (165) is abutted against the outside of the motor housing (11). A positioning block (1651) is formed on one side of the connecting disk (165), and the positioning block (1651) is located radially outside the shaft head (1642). The positioning block (1651) and the shaft head (1642) are adapted to be plugged into the corresponding support foot (15), and the motor housing (11) is hinged to the corresponding support foot (15) via the connecting disk (165).

5. The circulating fan with a built-in gear transmission swing structure according to claim 1, characterized in that: The fan body (1) is provided with a blade motor (17), the blade motor (17) being installed in the front part of the motor housing (11), the blade motor (17) comprising a blade motor body (170) and a blade motor circuit board (171), the blade motor circuit board (171) being arranged close to the rear side of the blade motor body (170).

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