A bladeless fan base that can be rotated electrically or manually

Abstract

The utility model relates to a kind of bladeless fan base that can be electric or manually rotated, realize the combination of two kinds of rotation adjustment mode of electric and manual, drive gear and gear ring are engaged by motor on fan base, since gear ring is fixed immovably under the action of elastic positioning mechanism, to drive gear rotates around gear ring, realize the automatic rotation of fan base, satisfy the needs that user can let fan large-scale air supply without manual operation;And when motor does not work, user can directly manually rotate fan base, since drive gear and gear ring are not engaged immovably, when external force is greater than the elasticity of elastic positioning mechanism, drive gear, gear ring, motor and fan base relatively fixed base whole rotation, flexibly and quickly adjust fan orientation, cope with the needs of temporarily changing wind direction;The flexible switching of two kinds of adjustment mode, comprehensively covers the use habits of different users and the use needs of various scenes, greatly improves the practicability of product.

Description

Technical Field

[0001] This utility model relates to the field of bladeless fan technology, and in particular to a bladeless fan base that can be rotated electrically or manually. Background Technology

[0002] In the current bladeless fan market, the function of the base driving the fan to rotate horizontally in the circumferential direction is quite common, but existing products have obvious limitations in the rotation method. At present, the rotation methods of bladeless fan bases are mainly divided into two categories: one type only supports automatic rotation driven by the motor, and users cannot manually adjust the fan direction according to their immediate needs. This will cause great inconvenience when there is a sudden need to change the airflow direction or when the motor malfunctions temporarily; the other type can only rely on manual rotation and lacks automatic rotation function, which makes it difficult to meet the user's need for the fan to change the airflow direction on its own to achieve a wide range of air circulation. Especially in scenarios where the user leaves or it is inconvenient to operate manually, its practicality is greatly reduced. Utility Model Content

[0003] The present invention aims to at least partially solve one of the problems existing in the prior art. To this end, the present invention proposes a bladeless fan base that can be rotated electrically or manually.

[0004] To achieve the above objectives, this utility model provides the following technical solution: A bladeless fan base that can be electrically or manually rotated includes a fixed base and a fan base rotatably mounted on the fixed base. A fan motor assembly is disposed within the fan base. The base is characterized in that: a central protrusion is provided at the upper end of the fixed base, and an annular groove is provided on the outer circumference of the central protrusion. A gear ring is rotatably mounted within the annular groove. An elastic positioning mechanism for positioning the gear ring is also provided within the gear ring. A motor is disposed on the fan base, and the output axis of the motor extends downward into the fixed base and is provided with a drive gear capable of meshing with the gear ring.

[0005] In some embodiments, the elastic positioning mechanism includes a groove at the lower end of the annular groove, a positioning member and a spring for keeping the positioning member in an upward state are provided in the groove, the upper end of the positioning member is provided with a positioning convex circle, and a plurality of positioning grooves are evenly distributed along the circumference at the lower end of the gear ring, the positioning convex circle abuts against the positioning groove under the action of the spring.

[0006] In some embodiments, the bottom wall of the groove is provided with a limiting hole, the positioning member includes a disc and a guide rod provided at the lower end of the disc, the disc is movably disposed in the groove, the guide rod is movably inserted into the limiting hole, the spring is sleeved on the guide rod, and the upper end abuts against the disc and the lower end abuts against the bottom wall of the groove.

[0007] In some embodiments, a bearing assembly is further provided between the fixed base and the fan base.

[0008] In some embodiments, the bearing assembly includes an upper race, a lower race, and a ball-bearing cage disposed between the two, the upper race being connected to the fan base and the lower race being connected to the fixed base.

[0009] In some embodiments, a plurality of insert blocks are evenly distributed around the upper end of the upper seat ring, and a plurality of insertion holes that mate with the insert blocks are correspondingly provided at the lower end of the fan base.

[0010] In some embodiments, a plurality of studs are evenly distributed along the circumference at the lower end of the lower seat ring, and the studs are fixed to the fixed base by screws.

[0011] In some embodiments, a limiting annular flange is provided on the outer circumference of the lower seat ring, and a plurality of limiting hooks are evenly distributed along the circumference at the lower end of the fan base. The hook portion of the limiting hook is located below the limiting annular flange, and there is a gap between the hook portion and the limiting annular flange.

[0012] Compared with existing technologies, the advantages of this utility model are: it combines electric and manual rotation adjustment methods. The motor on the fan base drives a drive gear to mesh with a gear ring. Since the gear ring is fixed by the elastic positioning mechanism, the drive gear rotates around the gear ring, achieving automatic rotation of the fan base and meeting the user's need for wide-range airflow without manual operation. When the motor is not working, the user can directly rotate the fan base manually. Because the drive gear and gear ring are engaged and fixed, when the external force exceeds the elastic force of the elastic positioning mechanism, the drive gear, gear ring, motor, and fan base rotate as a whole relative to the fixed base, flexibly and quickly adjusting the fan direction to meet the need for temporary changes in airflow. The flexible switching between the two adjustment methods comprehensively covers the usage habits of different users and the needs of various scenarios, greatly improving the practicality of the product. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of the bladeless fan base of this utility model.

[0014] Figure 2 This is one of the partial cross-sectional structural diagrams of the base of this utility model.

[0015] Figure 3 This utility model Figure 2 A magnified structural diagram at point A.

[0016] Figure 4 This is the second partial cross-sectional view of the base of this utility model.

[0017] Figure 5 This utility model Figure 4 A magnified structural diagram at point B. Detailed Implementation

[0018] The following detailed description provides various embodiments or examples for implementing this utility model. Of course, these are merely embodiments or examples and are not intended to be limiting. Additionally, repeated reference numerals, such as repeated numbers and / or letters, may be used in different embodiments. These repetitions are for the purpose of simple and clear description of this utility model and do not represent a specific relationship between the different embodiments and / or structures discussed.

[0019] like Figures 1-5 The bladeless fan base shown is electrically or manually rotatable, characterized in that: it includes a fixed base 1 and a fan base 2 rotatably mounted on the fixed base 1, a fan motor assembly is disposed in the fan base 2, a central protrusion 3 is disposed at the upper end of the fixed base 1, an annular groove 4 is disposed on the outer circumference of the central protrusion 3, a gear ring 5 is rotatably mounted in the annular groove 4, an elastic positioning mechanism for positioning the gear ring 5 is also disposed in the gear ring 5, a motor 6 is disposed on the fan base 2, the output axis of the motor 6 extends downward into the fixed base 1 and is provided with a drive gear 7 that can mesh with the gear ring 5.

[0020] Based on the above structure, a combination of electric and manual rotation adjustment methods is achieved. The motor 6 on the fan base 2 drives the drive gear 7 to mesh with the gear ring 5. Since the gear ring 5 remains fixed under the action of the elastic positioning mechanism, the drive gear 7 rotates around the gear ring 5, enabling the fan base 2 to rotate automatically relative to the fixed base 1. This meets the user's need for a wide-range airflow without manual operation. When the motor 6 is not working, the user can directly rotate the fan base 2 manually. Since the drive gear 7 and gear ring 5 are engaged and remain fixed, when the external force exceeds the elastic force of the elastic positioning mechanism, the gear ring 5 will overcome the force of the elastic positioning mechanism, causing the drive gear 7, gear ring 5, motor 6, and fan base 2 to rotate as a whole relative to the fixed base 1. This allows for flexible and quick adjustment of the fan direction, addressing the need for temporary changes in airflow. The flexible switching between the two adjustment methods comprehensively covers the usage habits of different users and the needs of various scenarios, greatly improving the product's practicality.

[0021] The motor 6 is a stepper motor with a power-off locking function. When the motor 6 is not working, the output shaft can remain locked.

[0022] See Figure 4 , Figure 5As shown, the elastic positioning mechanism includes a groove 21 located at the lower end of the annular groove 4. A positioning element 22 and a spring 23 are provided in the groove 21 to keep the positioning element 22 in an upward state. A positioning convex circle 24 is provided at the upper end of the positioning element 22. Several positioning grooves 26 are evenly distributed along the circumference at the lower end of the gear ring 5. The positioning convex circle 24 abuts against the positioning groove 26 under the action of the spring 23.

[0023] When the motor rotates, the spring 23 pushes the positioning member 22 upward, causing the positioning convex circle 24 to engage in the positioning groove 26 at the lower end of the gear ring 5, thus fixing the gear ring 5 and ensuring that the drive gear 7 can rotate stably around the gear ring 5. When the motor rotates, if the external force is greater than the elastic force of the spring 23, the positioning convex circle 24 will disengage from the positioning groove 26, and the gear ring 5 will rotate together with the fan base 2 and other components. After the external force disappears, under the action of the spring 23, the positioning convex circle 24 will engage in the corresponding positioning groove 26 again, thus achieving positioning.

[0024] Thus, through the cooperation of spring 23, positioning convex circle 24, and positioning groove 26, the gear ring 5 is effectively positioned, ensuring stability during electric rotation. At the same time, it can smoothly disengage from the positioning when rotated manually, ensuring smooth operation and accurate positioning, thereby improving the reliability of adjustment.

[0025] Furthermore, the bottom wall of the groove 21 is provided with a limiting hole 31, and the positioning member 22 includes a disc 32 and a guide rod 33 located at the lower end of the disc 32. The disc 32 is movably disposed in the groove 21, and the guide rod 33 is movably inserted into the limiting hole 31. The spring 23 is sleeved on the guide rod 33, with its upper end abutting against the disc 32 and its lower end abutting against the bottom wall of the groove 21.

[0026] When the positioning component 22 moves up and down, the guide rod 33 moves within the limiting hole 31, guiding the movement direction of the positioning component 22 and preventing it from deviating; under the guidance of the guide rod 33, the spring 23 can stably apply an upward elastic force to the disc 32, ensuring the matching effect between the positioning convex circle 24 and the positioning groove 26.

[0027] See Figure 2 , Figure 3 As shown, a bearing assembly is also provided between the fixed base 1 and the fan base 2. By setting the bearing assembly, the coefficient of friction between the fixed base 1 and the fan base 2 can be reduced. When the fan base 2 rotates relative to the fixed base 1, the rolling elements of the bearing assembly roll, reducing the frictional resistance between the two and making the rotation smoother.

[0028] Furthermore, the bearing assembly includes an upper race 51, a lower race 52, and a ball-bearing cage 53 disposed between the two. The upper race 51 is connected to the fan base 2, and the lower race 52 is connected to the fixed base 1.

[0029] When the fan base 2 rotates, it drives the upper bearing ring 51 to rotate. The balls roll between the upper bearing ring 51 and the lower bearing ring 52 under the constraint of the cage 53, converting sliding friction into rolling friction and reducing rotational resistance.

[0030] Multiple insert blocks 61 are evenly distributed around the upper end of the upper bearing ring 51, and multiple insertion holes 62 that mate with the insert blocks 61 are correspondingly provided at the lower end of the fan base 2. The mating of the insert blocks 61 and the insertion holes 62 enables the upper bearing ring 51 to rotate synchronously with the fan base 2, ensuring the power transmission between the bearing assembly and the fan base 2 and ensuring the consistency of the rotational motion.

[0031] Multiple studs are evenly distributed around the lower end of the lower bearing ring 52, and the studs are fixed to the fixed base 1 by screws. The lower bearing ring 52 is tightly connected to the fixed base 1 by screws, so that the lower bearing ring 52 remains fixed when the fan base 2 rotates, providing stable support for the bearing assembly and ensuring the normal rotation of the upper bearing ring 51.

[0032] Furthermore, a limiting annular flange 81 is provided on the outer circumference of the lower seat ring 52, and a plurality of limiting hooks 82 are evenly distributed along the circumference at the lower end of the fan base 2. The hook part 83 of the limiting hook 82 is located below the limiting annular flange 81, and there is a gap between the hook part 83 and the limiting annular flange 81.

[0033] During the rotation of the fan base 2, the hook part 83 of the limiting hook 82 and the limiting annular flange 81 of the lower seat ring 52 cooperate with each other to play an axial limiting role for the fan base 2, preventing the fan base 2 from detaching upward from the fixed base 1 during rotation. At the same time, the gap between the two ensures that the fan base 2 can rotate freely.

[0034] On the other hand, it increases the connection stability between the fan base 2 and the fixed base 1, effectively preventing the fan base 2 from axially shifting or detaching during rotation or use, thus improving the safety and reliability of the product, without affecting the normal rotation function of the fan base.

[0035] Based on the accompanying drawings and the foregoing display and description of the basic principles, main features, and advantages of this utility model, those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A bladeless fan base that can be rotated electrically or manually, characterized in that: The device includes a fixed base (1) and a fan base (2) rotatably mounted on the fixed base (1). A fan motor assembly is provided inside the fan base (2). The device is characterized in that: a central protrusion (3) is provided at the upper end of the fixed base (1), and an annular groove (4) is provided on the outer circumference of the central protrusion (3). A gear ring (5) is rotatably mounted in the annular groove (4). An elastic positioning mechanism for positioning the gear ring (5) is also provided inside the gear ring (5). A motor (6) is provided on the fan base (2). The output shaft of the motor (6) extends downward into the fixed base (1) and is provided with a drive gear (7) that can mesh with the gear ring (5).

2. The bladeless fan base that can be electrically or manually rotated according to claim 1, characterized in that: The elastic positioning mechanism includes a groove (21) located at the lower end of the annular groove (4). A positioning element (22) and a spring (23) are provided in the groove (21) to keep the positioning element (22) in an upward state. A positioning convex circle (24) is provided at the upper end of the positioning element (22). Several positioning grooves (26) are evenly distributed along the circumference at the lower end of the toothed ring (5). The positioning convex circle (24) abuts against the positioning groove (26) under the action of the spring (23).

3. The bladeless fan base that can be electrically or manually rotated according to claim 2, characterized in that: The bottom wall of the groove (21) is provided with a limiting hole (31). The positioning member (22) includes a disc (32) and a guide rod (33) located at the lower end of the disc (32). The disc (32) is movably disposed in the groove (21). The guide rod (33) is movably inserted into the limiting hole (31). The spring (23) is sleeved on the guide rod (33), with its upper end abutting against the disc (32) and its lower end abutting against the bottom wall of the groove (21).

4. The bladeless fan base that can be electrically or manually rotated according to claim 1, characterized in that: A bearing assembly is also provided between the fixed base (1) and the fan base (2).

5. A bladeless fan base that can be electrically or manually rotated according to claim 4, characterized in that: The bearing assembly includes an upper bearing ring (51), a lower bearing ring (52), and a ball bearing cage (53) disposed between the two. The upper bearing ring (51) is connected to the fan base (2), and the lower bearing ring (52) is connected to the fixed base (1).

6. The bladeless fan base that can be electrically or manually rotated according to claim 5, characterized in that: Multiple inserts (61) are evenly distributed around the upper end of the upper seat ring (51), and multiple insertion holes (62) that cooperate with the inserts (61) are correspondingly provided at the lower end of the fan base (2).

7. A bladeless fan base that can be electrically or manually rotated according to claim 5, characterized in that: Multiple studs are evenly distributed around the lower end of the lower seat ring (52), and the studs are fixed to the fixed base (1) by screws.

8. A bladeless fan base that can be electrically or manually rotated according to claim 5, characterized in that: A limiting annular flange (81) is provided on the outer circumference of the lower seat ring (52). Multiple limiting hooks (82) are evenly distributed along the circumference at the lower end of the fan base (2). The hook part (83) of the limiting hook (82) is located below the limiting annular flange (81), and there is a gap between the hook part (83) and the limiting annular flange (81).

Images