A left-right oscillating head drive structure and a desktop circulating fan

Abstract

This invention provides a left-right oscillating drive structure and a desktop circulating fan, including a foot platform and a rotating bracket mounted on top of the foot platform. By incorporating large and small bearings inside the foot platform and using an interference fit to connect the rotating shaft to the inner rings of the large and small bearings, the left-right oscillating bracket can be stably supported on the foot platform via the rotating shaft, thus achieving good rotational stability and structural reliability. The outer rings of the large and small bearings are snapped and fixed inside the foot platform, achieving radial positioning and axial limiting of the rotating shaft, effectively improving the overall structure's load-bearing capacity and operational smoothness. Simultaneously, the use of large and small bearings with excellent rolling performance significantly reduces frictional resistance during rotation, improves the smoothness of the oscillation motion, effectively reduces operating noise and component wear, and enhances the overall user experience. This not only improves the user's operating experience but also significantly extends the product's service life.

Description

Technical Field

[0001] This utility model relates to the field of household appliance technology, and in particular to a left-right oscillating head drive structure and a desktop circulating fan. Background Technology

[0002] Most desktop circulating fans on the market currently use a design where steel balls or glass beads are used in conjunction with a bushing to control the left and right oscillation mechanism. While this traditional structure achieves the oscillation function of the fan head to some extent, it still has many shortcomings in actual use. For example, during oscillation, it often experiences uneven rotation, jamming, and in severe cases, abnormal noise, affecting the user experience. In addition, due to mechanical wear and changes in lubrication conditions, this type of structure usually requires regular lubrication to maintain its normal operation, increasing maintenance costs and inconvenience.

[0003] Therefore, there is an urgent need for a new type of oscillating drive mechanism that is more efficient, stable, and requires less maintenance, in order to improve the overall performance and user experience of desktop circulating fans. Utility Model Content

[0004] This utility model addresses the defects and shortcomings of existing technologies by providing a left-right oscillating drive structure and desktop circulating fan that eliminates the hidden dangers of wobbling, jamming, and abnormal noise, and does not require regular lubrication.

[0005] To achieve the above objectives, the technical solution adopted by this utility model to solve its technical problem is: a left-right oscillating head drive structure and a desktop circulating fan, including a foot platform and a rotating bracket installed on the top of the foot platform; it also includes a left-right oscillating bracket rotatably connected to the foot platform, a large bearing and a small bearing disposed in the foot platform, and a drive assembly installed in the foot platform for driving the left-right oscillating bracket to rotate relative to the foot platform. The center of the left-right oscillating bracket extends downward towards one end of the foot platform to form a rotating shaft. The outer rings of the large bearing and the small bearing are both engaged in the foot platform. The rotating shaft is interference-fitted with the inner rings of the large bearing and the small bearing. The drive assembly drives the left-right oscillating bracket to rotate the rotating shaft, thereby causing the inner rings of the large bearing and the small bearing to rotate synchronously relative to the foot platform.

[0006] Furthermore, at one end of the left-right swing bracket facing the foot platform, a ring of external gears is evenly arranged circumferentially.

[0007] Furthermore, the drive assembly includes a stepper motor and a pinion mounted on the output shaft of the stepper motor for meshing with the external gear; the stepper motor drives the pinion to mesh with the external gear and rotates the rotating shaft, thereby causing the inner rings of the large bearing and the small bearing to rotate synchronously relative to the foot platform.

[0008] Furthermore, the foot platform is provided with a motor bracket for fixing the stepper motor inside the foot platform. The motor bracket has a U-shaped mounting groove, and the stepper motor is snapped into the U-shaped mounting groove.

[0009] Furthermore, the foot platform is also provided with a first annular groove and a second annular groove, and the outer ring of the large bearing and the outer ring of the small bearing are respectively engaged in the first annular groove and the second annular groove.

[0010] Furthermore, the left and right swing bracket is provided with a storage part and a winding cord, and the first end of the winding cord passes through the storage part and is snapped onto the rotating bracket.

[0011] Furthermore, the left and right head-swinging drive structure also includes a buckle, which is sleeved at the junction of the rotating shaft and the foot platform.

[0012] Furthermore, the left and right head-swinging drive structure also includes a circuit board, a power board, and a power cord disposed within the foot platform. The bottom of the foot platform is provided with a through hole through which the power cord can pass. The power cord passes through the through hole and is electrically connected to the circuit board and the power board.

[0013] In addition, this utility model also provides a desktop circulating fan, including a fan head and a left-right oscillating drive structure described in any of the above solutions; the fan head is mounted on the rotating bracket.

[0014] The beneficial effects of the left-right swing head drive structure provided by this utility model are as follows: By setting large and small bearings inside the foot platform and using an interference fit to connect the rotating shaft to the inner rings of the large and small bearings, the left-right swing bracket can be stably supported on the foot platform through the rotating shaft, thus possessing good rotational stability and structural reliability. The outer rings of the large and small bearings are snapped and fixed inside the foot platform, realizing radial positioning and axial limiting of the rotating shaft, effectively improving the overall structure's load-bearing capacity and operational stability. At the same time, due to the use of large and small bearings with excellent rolling performance, the frictional resistance generated during rotation is significantly reduced, improving the smoothness of the swinging motion, effectively reducing noise and component wear during operation, and enhancing the overall user experience. The drive assembly is used to drive the left-right swing bracket to rotate the rotating shaft, thereby driving the inner rings of the large and small bearings to rotate synchronously. This drive method has a compact structure and high transmission efficiency, avoiding the jamming and abnormal noise problems that are prone to occur in traditional steel ball or bushing structures, not only improving the user's operating experience but also significantly extending the product's service life. Attached Figure Description

[0015] Figure 1This is a schematic diagram of the left and right head swing drive structure provided by this utility model.

[0016] Figure 2 A cross-sectional view of the left and right head swing drive structure provided by this utility model. Figure 1 ;

[0017] Figure 3 Exploded view of the left and right head-swinging drive structure provided by this utility model Figure 1 ;

[0018] Figure 4 Exploded view of the left and right head-swinging drive structure provided by this utility model Figure 2 ;

[0019] Figure 5 A cross-sectional view of the left and right head swing drive structure provided by this utility model. Figure 2 . Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0021] See Figure 1-5 This utility model provides a left-right oscillating drive structure and a desktop circulating fan. The left-right oscillating drive structure includes a foot platform 1 and a rotating bracket 2 installed on the top of the foot platform 1; it also includes a left-right oscillating bracket 3 rotatably connected to the foot platform 1, a large bearing 4 and a small bearing 5 disposed in the foot platform 1, and a drive assembly 6 installed in the foot platform 1 for driving the left-right oscillating bracket 3 to rotate relative to the foot platform 1. The center of the left-right oscillating bracket 3 extends downward towards the foot platform 1 to form a rotating shaft 31. The outer rings of the large bearing 4 and the small bearing 5 are both engaged in the foot platform 1, and the rotating shaft 31 is interference-fitted with the inner rings of the large bearing 4 and the small bearing 5. The drive assembly 6 drives the left-right oscillating bracket 3 to rotate the rotating shaft 31, thereby causing the inner rings of the large bearing 4 and the small bearing 5 to rotate synchronously relative to the foot platform 1.

[0022] In this embodiment, the left and right swing bracket 3 has a ring of external gears 32 evenly arranged circumferentially at one end facing the foot platform 1.

[0023] In this embodiment, the drive assembly 6 includes a stepper motor 61 and a pinion 62 disposed on the output shaft of the stepper motor 61 for meshing and transmitting power with the external gear 32; the stepper motor 61 drives the pinion 62 to mesh and transmit power with the external gear 32 and drives the rotating shaft 31 to rotate, thereby driving the inner ring of the large bearing 4 and the inner ring of the small bearing 5 to rotate synchronously relative to the foot platform 1.

[0024] In this embodiment, the foot platform 1 is provided with a motor bracket 11 for fixing the stepper motor 61 inside the foot platform 1. The motor bracket 11 has a U-shaped mounting groove, and the stepper motor 61 is snapped into the U-shaped mounting groove.

[0025] In this embodiment, the foot platform 1 is also provided with a first annular groove 12 and a second annular groove 13, and the outer ring of the large bearing 4 and the outer ring of the small bearing 5 are respectively engaged in the first annular groove 12 and the second annular groove 13.

[0026] In this embodiment, the left and right swing bracket 3 is provided with a storage part 33 and a winding cord 7. The first end of the winding cord 7 passes through the storage part 33 and is then snapped onto the rotating bracket 2.

[0027] In this embodiment, the left and right head swing drive structure further includes a buckle 8, which is sleeved at the junction of the rotating shaft 31 and the foot platform 1.

[0028] In this embodiment, the left and right head swing drive structure further includes a circuit board 14, a power board 15, and a power cord 16 fixed in the foot platform 1. The bottom of the foot platform 1 is provided with a through hole through which the power cord 16 can pass. The power cord 16 passes through the through hole and is electrically connected to the circuit board 14 and the power board 15.

[0029] In addition, this utility model also provides a desktop circulating fan, including a fan head 9 and a left and right oscillating drive structure as described in any of the above solutions; the fan head 9 is mounted on the rotating bracket 2.

[0030] Preferably, the large bearing 4 and the small bearing 5 are respectively sleeved on the rotating shaft 31 and arranged at intervals along the axial direction. The outer rings of the large bearing 4 and the small bearing 5 are both snapped and fixed inside the foot 1. The foot 1 is provided with a first annular groove 12 and a second annular groove 13, and the outer rings of the large bearing 4 and the small bearing 5 are respectively embedded in the corresponding grooves to achieve radial limiting and axial positioning. The rotating shaft 31 is connected to the inner rings of the large bearing 4 and the small bearing 5 by an interference fit, which is to ensure that the rotating shaft 31 can drive the inner rings of the bearings to rotate synchronously when it rotates. By using high-precision rolling bearings to replace the traditional steel ball or bushing structure, the stability and smoothness during rotation are significantly improved, and problems such as jamming and abnormal noise are effectively avoided.

[0031] A ring of external gears 32 is evenly arranged circumferentially at one end of the left and right swing bracket 3 facing the foot platform 1 to achieve stable meshing transmission with the pinion 62. The pinion 62 meshes with the external gears 32 arranged on the left and right swing bracket 3, thereby transmitting power to the swing bracket and realizing precise angle control and stable transmission.

[0032] Furthermore, in order to ensure the stable installation of the stepper motor 61, a motor bracket 11 is provided inside the foot 1. The motor bracket 11 has a U-shaped mounting groove, in which the stepper motor 61 is snapped into the U-shaped mounting groove, thereby achieving a stable installation while facilitating assembly and disassembly.

[0033] In addition, the left and right swing bracket 3 is also provided with a storage part 33, and a winding cord 7 is snapped into the storage part 33. The storage part 33 is used to store the power cord 16 or control cord to prevent the cord from getting tangled, while also improving the overall aesthetics and safety of use.

[0034] The power cord 16 passes through the through hole at the bottom of the foot 1, and after being connected to an external power source, it is electrically connected to the circuit board 14 and the power board 15 to power the entire desktop circulating fan.

[0035] To enhance the overall sealing and stability of the structure, the left and right swing drive structure also includes a retaining ring 8, which is sleeved at the junction of the rotating shaft 31 and the foot platform 1 to play an axial limiting role and prevent the bearing assembly from loosening.

[0036] In actual operation, the power board 15 supplies power to the circuit board 14, which controls the stepper motor 61 to rotate, driving the pinion 62 to rotate, which in turn drives the external gear 32 on the left and right swing bracket 3, causing the rotating shaft 31 to rotate. Since the rotating shaft 31 is interference-fitted with the inner rings of the large bearing 4 and the small bearing 5, the inner rings of the bearings rotate synchronously with the rotating shaft 31, while the outer rings of the bearings remain fixed inside the foot platform 1, thus achieving stable swinging of the left and right swing bracket 3 relative to the foot platform 1.

[0037] This invention solves the defects of existing desktop circulating fans, such as jamming and abnormal noise, during left and right oscillation by optimizing the oscillation drive structure. At the same time, it eliminates the maintenance requirement of regularly adding lubricating oil in the traditional structure. It has the advantages of stable operation, low noise, smooth oscillation, compact structure and strong maintenance-free operation.

[0038] In addition, this structure is suitable for a variety of small household appliances that require automatic oscillation function, such as desktop circulating fans, air circulating fans, and electric heaters, and has good application prospects and market promotion value.

[0039] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A left-right head-swinging drive structure, comprising a foot platform (1) and a rotating bracket (2) mounted on the top of the foot platform (1); characterized in that, It also includes a left and right swing bracket (3) rotatably connected to the footrest (1), a large bearing (4) and a small bearing (5) disposed in the footrest (1), and a drive assembly (6) installed in the footrest (1) for driving the left and right swing bracket (3) to rotate relative to the footrest (1). The center of the left and right swing bracket (3) extends downward toward the footrest (1) to form a rotating shaft (31). The outer ring of the large bearing (4) and the outer ring of the small bearing (5) are both engaged in the footrest (1). The rotating shaft (31) is interference-fitted with the inner ring of the large bearing (4) and the inner ring of the small bearing (5). The drive assembly (6) drives the left and right swing bracket (3) to rotate the rotating shaft (31), thereby driving the inner ring of the large bearing (4) and the inner ring of the small bearing (5) to rotate synchronously relative to the footrest (1).

2. The left and right head-swinging drive structure as described in claim 1, characterized in that, The left and right swing bracket (3) has a ring of external gears (32) evenly arranged circumferentially at one end facing the foot platform (1).

3. The left and right head-swinging drive structure as described in claim 2, characterized in that, The drive assembly (6) includes a stepper motor (61) and a pinion (62) disposed on the output shaft of the stepper motor (61) for meshing and driving with the external gear (32); the stepper motor (61) drives the pinion (62) to mesh and drive with the external gear (32) and drives the rotating shaft (31) to rotate, thereby driving the inner ring of the large bearing (4) and the inner ring of the small bearing (5) to rotate synchronously relative to the foot platform (1).

4. The left and right head swinging driving structure according to claim 3, wherein The footrest (1) is provided with a motor bracket (11) for fixing the stepper motor (61) inside the footrest (1). The motor bracket (11) has a U-shaped mounting groove, and the stepper motor (61) is snapped into the U-shaped mounting groove.

5. The left and right head swinging driving structure according to claim 4, wherein The footrest (1) is also provided with a first annular groove (12) and a second annular groove (13), and the outer ring of the large bearing (4) and the outer ring of the small bearing (5) are respectively engaged in the first annular groove (12) and the second annular groove (13).

6. The left and right head swinging driving structure according to claim 1, wherein The left and right swing bracket (3) is provided with a storage part (33) and a winding cord (7). The first end of the winding cord (7) passes through the storage part (33) and is then snapped onto the rotating bracket (2).

7. The left and right head swinging driving structure according to claim 3, wherein The left and right head swing drive structure also includes a buckle (8), which is sleeved at the junction of the rotating shaft (31) and the foot platform (1).

8. The left and right head swinging driving structure according to claim 1, wherein The left and right head swing drive structure also includes a circuit board (14) fixed in the foot platform (1), a power board (15), and a power cord (16) disposed in the foot platform (1). The bottom of the foot platform (1) is provided with a through hole through which the power cord (16) can pass. The power cord (16) passes through the through hole and is electrically connected to the circuit board (14) and the power board (15).

9. A desktop circulating fan, characterized in that, It includes a fan head (9) and a left-right oscillating head drive structure as described in any one of claims 1-8; the fan head (9) is mounted on the rotating bracket (2).

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