A dual-head fan

Abstract

This utility model relates to the field of household appliances, specifically a dual-head fan. By installing a first switch and a second switch on the motor mounting housing, the first switch controls the operating state of the first output mechanism, and the second switch controls the operating state of the second output mechanism. This allows users to individually activate either the first or second fan impeller, or activate both impellers simultaneously, according to their actual needs. This facilitates meeting diverse ventilation requirements, helps avoid unnecessary energy consumption, and effectively solves the problem of existing dual-head fans that generally use a single drive motor with dual output shafts. While fan impellers are mounted on the output shafts at both ends of the motor to achieve synchronous airflow from both sides, in actual use, when only one side needs airflow, the other fan is still forced to run and cannot be turned off independently, resulting in wasted energy and difficulty in meeting diverse ventilation needs.

Description

Technical Field

[0001] This utility model relates to the field of household appliances, specifically a double-headed fan. Background Technology

[0002] With technological advancements and the diversification of lifestyle needs, people have placed higher demands on the functionality and practicality of fans. In response to these demands, dual-head fans have emerged and gradually become more widespread. Dual-head fans, with their unique design and two fan heads, can simultaneously deliver airflow in different directions, effectively expanding the airflow area. Whether for daily home use, office spaces, or commercial spaces, dual-head fans can be flexibly adapted, bringing people a more comfortable and convenient cooling experience.

[0003] To achieve a compact structure and synchronous airflow, existing dual-head fans often employ a single drive motor with dual output shafts. For example, Chinese patent CN212055218U proposes a novel fan impeller and a coaxial dual-head fan using this impeller. The motor's output shafts at both ends are fitted with fan impellers, enabling synchronous airflow from both sides. However, in this structure, the impellers at both ends always rotate in tandem. In practical use, when the user only needs airflow from one side, the other fan is still forced to run and cannot be turned off independently, resulting in wasted energy and failing to meet diverse ventilation needs.

[0004] This utility model was proposed in response to the shortcomings of the existing technology. Utility Model Content

[0005] The existing dual-head fans generally employ a single drive motor with dual output shafts, with fan impellers mounted on the output shafts at both ends of the motor to achieve synchronous airflow from both sides. However, in actual use, when the user only needs airflow from one side, the other fan is still forced to run and cannot be turned off independently, resulting in wasted energy and difficulty in meeting diverse ventilation needs. The technical solution adopted by this utility model to solve this problem is as follows:

[0006] A dual-head fan includes a motor mounting housing, a dual-output-shaft motor mounted inside the motor mounting housing, and a fan impeller assembly. The dual-output-shaft motor includes a first output mechanism, a second output mechanism, and a connecting bracket. The first output mechanism includes a first output shaft, and the second output mechanism includes a second output shaft. The first and second output mechanisms are detachably mounted on both sides of the connecting bracket. The fan impeller assembly includes a first fan impeller connected to the first output shaft and a second fan impeller connected to the second output shaft. The motor mounting housing is provided with a first switch and a second switch. The first switch is electrically connected to the first output mechanism to control the operating state of the first output shaft, and the second switch is electrically connected to the second output mechanism to control the operating state of the second output shaft.

[0007] Furthermore, the outer wall of the motor mounting housing is provided with a receiving groove, and the receiving groove is provided with a mosquito repellent bottle containing mosquito repellent liquid. The heat generated by the dual output shaft motor when it is working is conducted to the mosquito repellent bottle through the motor mounting housing to heat the mosquito repellent liquid.

[0008] Furthermore, the motor mounting housing includes a mounting bracket, a fixed bracket is provided on one side of the mounting bracket, and a oscillating drive mechanism and an oscillating transmission mechanism are provided between the mounting bracket and the fixed bracket. The oscillating drive mechanism is connected to the mounting bracket, and the oscillating transmission mechanism is connected to the fixed bracket. The mounting bracket is also provided with a protective cover covering the outer periphery of the oscillating drive mechanism and the oscillating transmission mechanism. The oscillating drive mechanism and the oscillating transmission mechanism are connected in cooperation, and the oscillating drive mechanism drives the mounting bracket to rotate relative to the fixed bracket.

[0009] Furthermore, the first output shaft and the second output shaft rotate in opposite directions.

[0010] Furthermore, the first output mechanism includes a first stator mechanism disposed on one side of the connecting bracket and a first rotor mechanism rotatable relative to the first stator mechanism, and the first output shaft is disposed on the first rotor mechanism and extends in a direction away from the second output mechanism; the second output mechanism includes a second stator mechanism disposed on the other side of the connecting bracket and a second rotor mechanism rotatable relative to the second stator mechanism, and the second output shaft is disposed on the second rotor mechanism and extends in a direction away from the first output mechanism.

[0011] Furthermore, the first stator mechanism includes a first stator core and a first stator winding wound on the first stator core, the second stator mechanism includes a second stator core and a second stator winding wound on the second stator core, the first output mechanism includes a first end cover located on the side of the first stator mechanism away from the connecting bracket and covering the outer periphery of the first stator winding, the second output mechanism includes a second end cover located on the side of the second stator mechanism away from the connecting bracket and covering the outer periphery of the second stator winding, and both the first end cover and the second end cover are provided with heat dissipation vents.

[0012] Furthermore, a first air gap is provided between the first stator mechanism and the first rotor mechanism, and a second air gap is provided between the second stator mechanism and the second rotor mechanism. The first output mechanism includes a first bearing disposed on the first end cover and a second bearing disposed on the connecting bracket. The two sides of the first output shaft are rotatably mounted on the first bearing and the second bearing, respectively. The second output mechanism includes a third bearing disposed on the second end cover and a fourth bearing disposed on the connecting bracket. The two sides of the second output shaft are rotatably mounted on the third bearing and the fourth bearing, respectively.

[0013] Furthermore, the oscillating drive mechanism includes an oscillating drive motor connected to the mounting bracket and a drive gear connected to the oscillating drive motor. The oscillating transmission mechanism includes a fixed shaft connected to the fixed bracket and a fixed gear connected to the fixed shaft. The drive gear and the fixed gear mesh, and the oscillating drive motor drives the drive gear to rotate, so that the mounting bracket fixedly connected to the drive gear rotates relative to the fixed bracket.

[0014] Furthermore, a mounting cavity for accommodating the drive gear and the fixed gear is formed between the protective cover and the mounting bracket. The mounting bracket has a mounting hole on its lower side, and the fixed shaft passes through the mounting hole and connects to the fixed gear in the mounting cavity.

[0015] Furthermore, the mounting bracket is provided with a first mounting structure and a second mounting structure. The first mounting structure includes a first mounting part for mounting the oscillating drive motor and a second mounting part for mounting the fixed shaft. The second mounting structure includes a third mounting part for mounting the first switch and the second switch.

[0016] The beneficial effects of this utility model are as follows:

[0017] 1. This utility model provides a first switch and a second switch on the motor mounting housing. The first switch controls the operating state of the first output mechanism, and the second switch controls the operating state of the second output mechanism. This allows users to turn on the first fan impeller or the second fan impeller individually, or to turn on the first fan impeller and the second fan impeller simultaneously, according to actual usage needs. This helps to meet diverse ventilation requirements, avoid unnecessary energy consumption, and effectively solves the problem that existing dual-head fans generally use a single drive motor with dual output shafts. Fan impellers are mounted on the output shafts at both ends of the motor to achieve synchronous air delivery on both sides. However, in actual use, when users only need air delivery on one side, the fan on the other side is still forced to run and cannot be turned off independently, resulting in wasted energy and difficulty in meeting diverse ventilation requirements.

[0018] 2. The outer wall of the motor mounting housing is provided with a receiving groove, and a mosquito repellent bottle containing mosquito repellent liquid is placed in the receiving groove. This allows the heat generated by the dual output shaft motor to be conducted to the mosquito repellent bottle through the motor mounting housing, thereby heating the mosquito repellent liquid and promoting its evaporation. This facilitates the integration of air supply and mosquito repellent functions, eliminating the need for users to configure an additional independent mosquito repellent device, which helps improve the device's multifunctionality and ease of use.

[0019] 3. By covering the mounting bracket with a protective cover, which is located on the outer periphery of the oscillating drive mechanism and the oscillating transmission mechanism, dust, lint and other debris in the air can be effectively isolated to prevent them from entering between the oscillating drive mechanism and the oscillating transmission mechanism. It also eliminates the risk of wires getting tangled and reduces the risk of the oscillating drive mechanism and the oscillating transmission mechanism getting stuck, making abnormal noises or failing to oscillate.

[0020] 4. By providing a first mounting part for mounting the oscillating drive motor, a second mounting part for mounting the fixed shaft, and a third mounting part for mounting the first and second switches on the mounting bracket, electrical components such as the oscillating drive motor, the fixed shaft, the first switch, and the second switch can be integrated and mounted on the mounting bracket, thereby shortening the wiring length, reducing wiring complexity, simplifying the overall structure of the fan, and improving compactness and integrity.

[0021] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. Attached Figure Description

[0022] Figure 1 This is one of the structural schematic diagrams of the dual-head fan of this utility model;

[0023] Figure 2 for Figure 1 An enlarged view of section B marked thereon;

[0024] Figure 3This is one of the exploded schematic diagrams showing the connection between the motor mounting housing and the mosquito repellent bottle of this utility model;

[0025] Figure 4 This is the second exploded view of the connection between the motor mounting housing and the mosquito repellent bottle of this utility model;

[0026] Figure 5 This is an exploded view of the dual-head fan of this utility model;

[0027] Figure 6 This is one of the exploded view diagrams of the dual-output shaft motor of this utility model;

[0028] Figure 7 This is the second exploded view of the dual-output shaft motor of this utility model;

[0029] Figure 8 This is a cross-sectional schematic diagram of the dual-output shaft motor of this utility model;

[0030] Figure 9 This is the second structural schematic diagram of the dual-head fan of this utility model;

[0031] Figure 10 This is a cross-sectional schematic diagram of the dual-head fan of this utility model;

[0032] Figure 11 This is a schematic diagram of the installation support of this utility model. Detailed Implementation

[0033] The embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0034] like Figures 1 to 11 A dual-head fan is shown, comprising a motor mounting housing 1, a dual-output shaft motor mounted inside the motor mounting housing 1, and a fan impeller assembly 2. The dual-output shaft motor includes a first output mechanism 31, a second output mechanism 32, and a connecting bracket 33. The first output mechanism 31 includes a first output shaft 301, and the second output mechanism 32 includes a second output shaft 302. The first output mechanism 31 and the second output mechanism 32 are respectively detachably mounted on both sides of the connecting bracket 33. The fan impeller assembly 2 includes a first fan impeller 21 connected to the first output shaft 301 and a second fan impeller 22 connected to the second output shaft 302. The motor mounting housing 1 is provided with a first switch 11 and a second switch 12. The first switch 11 is electrically connected to the first output mechanism 31 to control the operating state of the first output shaft 301, and the second switch 12 is electrically connected to the second output mechanism 32 to control the operating state of the second output shaft 302.

[0035] This invention features a first switch and a second switch on the motor mounting housing. The first switch controls the operation of the first output mechanism, and the second switch controls the operation of the second output mechanism. This allows users to individually activate either the first or second fan impeller, or activate both impellers simultaneously, according to their actual needs. This satisfies diverse ventilation requirements, helps avoid unnecessary energy consumption, and effectively solves the problem of existing dual-head fans that typically use a single drive motor with dual output shafts. While fan impellers are mounted on the output shafts at both ends of the motor to achieve synchronous airflow from both sides, in actual use, when only one side needs airflow, the other fan is forced to operate and cannot be turned off independently, resulting in wasted energy and difficulty in meeting diverse ventilation needs.

[0036] Specifically, the individual control of the first output mechanism 31 and the second output mechanism 32 is achieved through electrically independent drive circuits. Furthermore, the first output mechanism 31 and the second output mechanism 32 are each equipped with independent power supply lines and connected to the first switch 11 and the second switch 12 of the motor mounting housing 1. When the user operates the first switch 11, only the power supply circuit of the first output mechanism 31 is connected, causing the first output shaft 301 to drive the first fan impeller 21 to run, while the second output mechanism 32 remains de-energized and stationary. Similarly, operating the second switch 12 will only start the second output mechanism 32. Since the two output mechanisms are independent of each other in terms of circuit and power structure, the control system does not need complex modules and can realize multiple working modes such as single-sided operation and double-sided synchronous operation, thereby achieving the purpose of flexible control and on-demand air supply.

[0037] Furthermore, by detachably mounting the first output mechanism 31 and the second output mechanism 32 on both sides of the same connecting bracket 33, it is beneficial to form a modular combination structure, which helps to replace the traditional method of dispersing dual motors. This not only enables the independent operation of the first output mechanism 31 and the second output mechanism 32, but also significantly reduces the installation space and effectively improves the compactness of the overall structure by using the shared connecting bracket 33 for installation.

[0038] Furthermore, the first output mechanism 31 and the second output mechanism 32 are detachably mounted on the connecting bracket 33, which facilitates maintenance and replacement. If one of the output mechanisms fails, the user can easily repair or replace it without replacing the entire motor, thus helping to reduce maintenance costs.

[0039] like Figures 1 to 11 The outer wall of the motor mounting housing 1 shown is provided with a receiving groove 13, and the receiving groove 13 is provided with a mosquito repellent bottle 14 containing mosquito repellent liquid. The heat generated by the dual output shaft motor when it is working is conducted to the mosquito repellent bottle 14 through the motor mounting housing 1 to heat the mosquito repellent liquid.

[0040] Specifically, the outer wall of the motor mounting housing 1 is provided with a receiving groove 13, and a mosquito repellent bottle 14 containing mosquito repellent liquid is placed in the receiving groove 13. This allows the heat generated when the dual output shaft motor is working to be conducted to the mosquito repellent bottle 14 through the motor mounting housing 1, thereby heating the mosquito repellent liquid and promoting its evaporation. This facilitates the integration of air supply and mosquito repellent functions, eliminating the need for users to configure an additional independent mosquito repellent device, and improving the multifunctionality and ease of use of the device.

[0041] Furthermore, by providing a receiving groove 13 on the outer wall of the motor mounting housing 1, the heat naturally generated when the dual output shaft motor is working can be conducted through the motor mounting housing 1 to the mosquito repellent bottle 14 in the receiving groove 13. This eliminates the need for an additional heating device to achieve the mosquito repellent function and consume energy, thus meeting the mosquito repellent needs while reducing additional energy consumption and achieving the effect of energy saving.

[0042] Specifically, when the dual-output shaft motor is working, the windings of the dual-output shaft motor will generate heat due to electromagnetic losses and mechanical friction. Typically, the outer casing temperature can reach 50°C to 80°C. This heat is conducted through the heat-conducting material of the motor mounting housing 1 to the receiving groove 13 on the outer wall, and further transferred to the bottle wall of the mosquito repellent bottle 14, thereby continuously heating the mosquito repellent liquid inside the mosquito repellent bottle 14, causing its effective ingredients to evaporate and achieve the mosquito repellent function. It should be noted that this mosquito repellent function relies entirely on the heat generated by the dual-output shaft motor. When the dual-output shaft motor stops working, there is no heat source provided, the mosquito repellent liquid cannot be heated and evaporated, and the mosquito repellent function will stop immediately.

[0043] Furthermore, the receiving groove 13 is an upward-opening slot structure, and the mosquito repellent bottle 14 is detachably installed in the receiving groove 13; furthermore, the receiving groove 13 adopts an upward-opening slot structure so that the mosquito repellent bottle 14 can be inserted vertically or obliquely from above the motor mounting housing 1, thereby achieving quick installation. When the user replenishes the mosquito repellent liquid or replaces the empty mosquito repellent bottle 14, there is no need to disassemble the fan housing, motor or other functional components. The user only needs to take out the old mosquito repellent bottle 14 and put in the new mosquito repellent bottle 14 to complete the replacement, which helps to simplify the operation process; optionally, in some embodiments, the slot structure is an elastic snap-on slot, the side wall of the receiving groove 13 is provided with at least one elastic snap, and the corresponding position of the outer wall of the mosquito repellent bottle 14 is provided with an annular or dot-shaped groove. When the mosquito repellent bottle 14 is inserted into the slot, the elastic snap undergoes a slight deformation, rebounds after passing the bottle body and locks into the groove, thereby achieving positioning and locking. When disassembling, the user only needs to press down slightly or The mosquito repellent bottle 14 can be removed by lateral manipulation. Optionally, in some embodiments, the slot structure is a guide rail type slot, with an axially extending guide rail on the side wall of the receiving groove 13 and a guide slider on the corresponding position on the outer side wall of the mosquito repellent bottle 14. When the mosquito repellent bottle 14 is installed, the guide slider slides along the guide rail, which not only plays a guiding role and facilitates quick installation, but also restricts the circumferential rotation of the mosquito repellent bottle 14 through the cooperation of the guide rail and the slider, which helps to improve the installation stability. Furthermore, as a preferred embodiment of this utility model and not a limitation, the slot structure is a U-shaped slot. The cross-section of the receiving groove 13 is U-shaped or C-shaped, consisting of a bottom wall and a side wall, forming a groove open at the top. The cross-section of the mosquito repellent bottle 14 can be circular, square, or any shape that matches the U-shaped groove. The user can directly place the mosquito repellent bottle 14 vertically into the groove. The lower part of the bottle is supported by the bottom of the groove, and the sides of the bottle are limited by the groove walls to prevent it from swaying left and right.

[0044] Furthermore, the mosquito repellent bottle 14 is tightly fitted to the wall of the receiving groove 13, and the wall of the receiving groove 13 is provided with a hollow portion; specifically, the tight fit between the mosquito repellent bottle 14 and the wall of the receiving groove 13 ensures good thermal contact between the side wall of the mosquito repellent bottle 14 and the motor mounting housing 1, which helps to reduce the thermal resistance caused by the air gap. Since the heat generated by the dual output shaft motor during operation is mainly conducted to the mosquito repellent bottle 14 through the motor mounting housing 1, the tight fit design facilitates the efficient and uniform transfer of heat from the side wall of the motor mounting housing 1 to the circumferential surface of the mosquito repellent bottle 14, thereby accelerating and stabilizing the heating process of the mosquito repellent liquid, promoting its continuous evaporation, and effectively improving the mosquito repellent effect; optionally, in some embodiments, the hollow portion is a strip-shaped cross-cutting cutout, and the wall of the receiving groove 13 is provided with horizontal and vertical cross-cutting strip-shaped cutouts, forming a grid-like structure. The cross-cutting strip structure increases the complexity of airflow. After the heat from the motor mounting housing 1 is transferred to the groove wall, the air flows along... The horizontal and vertical strip-shaped perforations create a crisscrossing airflow, which can more efficiently transfer heat from the tank wall to the mosquito repellent bottle 14. It can also increase the contact area between the air and the mosquito repellent bottle 14 to a certain extent, accelerating heat conduction and improving the evaporation efficiency of the mosquito repellent liquid. Optionally, in some embodiments, the perforated portion is a honeycomb structure, composed of multiple tightly arranged hexagonal perforations. The honeycomb structure has a high space utilization rate, providing a large number of airflow channels while ensuring the structural strength of the tank wall. When the heat generated by the dual-output shaft motor is conducted to the tank wall, the air flows within the numerous hexagonal perforations, forming a dense airflow network that quickly transfers heat to the mosquito repellent bottle 14. Furthermore, the honeycomb structure helps to evenly distribute heat, avoiding excessively high or low local temperatures and ensuring continuous and stable evaporation of the mosquito repellent liquid. Further, the perforated portion includes several heat-conducting holes 131, which are spaced apart on the tank wall of the receiving tank 13.

[0045] Furthermore, the mosquito repellent bottle 14 is made of a thermally conductive material. The mosquito repellent bottle 14 is in direct contact with the motor mounting housing 1. The thermal conductivity of the mosquito repellent bottle 14 material directly affects the efficiency of heat transfer from the housing to the mosquito repellent liquid. Using a thermally conductive material significantly reduces the thermal resistance of the bottle wall, allowing the heat generated by the dual-output shaft motor to be quickly conducted through the motor mounting housing 1 to the inside of the mosquito repellent bottle 14, thereby heating the mosquito repellent liquid and promoting its rapid evaporation. Optionally, in some embodiments, the mosquito repellent bottle 14 is made of food-grade stainless steel. Food-grade stainless steel has good thermal conductivity, stable chemical properties, and will not release harmful substances within the fan's operating temperature range. It is also heat-resistant, corrosion-resistant, and will not react chemically with the mosquito repellent liquid, ensuring high safety. Optionally, in some embodiments, the mosquito repellent bottle 14 is made of high borosilicate glass. High borosilicate glass has moderate thermal conductivity, good light transmittance for easy observation of the remaining mosquito repellent liquid, and its material is stable and non-toxic. Even when heated, it will not produce substances harmful to the human body, and its smooth surface is easy to clean, preventing the growth of bacteria from mosquito repellent liquid residue.

[0046] Furthermore, the receiving groove 13 is located in the central area of ​​the top of the motor mounting housing 1.

[0047] Further, the horizontal length of the motor mounting housing 1 is 160mm to 200mm; optionally, in some embodiments, the horizontal length of the motor mounting housing 1 is 160mm. When the horizontal length of the motor mounting housing 1 is 160mm, the distance between the left and right fan heads is at the smaller value within this range, which can avoid mutual airflow interference caused by excessive distance, ensure stable airflow efficiency, and make the overall fan structure more compact; optionally, in some embodiments, the horizontal length of the motor mounting housing 1 is 200mm. When the horizontal length of the motor mounting housing 1 is 200mm... The larger distance between the fan heads on the left and right sides provides more independent diffusion space for the airflow on both sides, which can further reduce the possibility of airflow collision and cancellation, resulting in stronger stability of airflow efficiency. The larger distance also allows the fan to deliver air over a wider range. Furthermore, the horizontal length of the motor mounting housing 1 is 180mm. When the horizontal length of the motor mounting housing 1 is 180mm, the distance between the fan heads on the left and right sides is moderate, falling between 160mm and 200mm. This can effectively avoid airflow interference caused by too small a distance, ensuring stable airflow efficiency, while also preventing the overall size of the fan from becoming too large due to an excessively large distance.

[0048] like Figures 1 to 11The motor mounting housing 1 shown includes a mounting bracket 4, a fixed bracket 5 on one side of the mounting bracket 4, and a oscillating drive mechanism 61 and an oscillating transmission mechanism 62 between the mounting bracket 4 and the fixed bracket 5. The oscillating drive mechanism 61 is connected to the mounting bracket 4, and the oscillating transmission mechanism 62 is connected to the fixed bracket 5. The mounting bracket 4 is also provided with a protective cover 40 covering the outer periphery of the oscillating drive mechanism 61 and the oscillating transmission mechanism 62. The oscillating drive mechanism 61 and the oscillating transmission mechanism 62 are connected in cooperation, and the oscillating drive mechanism 61 drives the mounting bracket 4 to rotate relative to the fixed bracket 5.

[0049] Specifically, the mounting bracket 4 is a major component of the motor mounting housing 1, supporting the control module of the dual-head fan, the oscillation drive mechanism 61, and the oscillation transmission mechanism 62, among other components. The fixed bracket 5 serves as the support for the entire dual-head fan. The mounting bracket 4 and the fixed bracket 5 are connected via the oscillation drive mechanism 61 and the oscillation transmission mechanism 62. Furthermore, the oscillation drive mechanism 61 is directly connected to the mounting bracket 4 and serves as the power source, while the oscillation transmission mechanism 62 is directly connected to the fixed bracket 5 and is responsible for transmitting the rotational power of the oscillation drive mechanism 61. When the oscillation drive mechanism 61 is running, the power transmission of the oscillation drive mechanism 61... The fixed support 5 connected to the oscillation transmission mechanism 62 is fixed in place. The oscillation drive mechanism 61 drives the mounting support 4 to rotate relative to the fixed support 5 under its own power, so as to realize the oscillation function of the double-head fan. Furthermore, by setting a protective cover 40 on the outer periphery of the oscillation drive mechanism 61 and the oscillation transmission mechanism 62, dust, lint and other debris in the air can be effectively isolated to prevent them from entering between the oscillation drive mechanism 61 and the oscillation transmission mechanism 62. It also eliminates the risk of wires getting tangled and reduces the risk of the oscillation drive mechanism 61 and the oscillation transmission mechanism 62 getting stuck, making abnormal noise or failing to oscillate.

[0050] like Figures 1 to 11 The first output shaft 301 and the second output shaft 302 shown rotate in opposite directions;

[0051] Optionally, the first output mechanism 31, the second output mechanism 32, and the connecting bracket 33 are arranged along the same central axis, and the first output shaft 301 and the second output shaft 302 are coaxially arranged. The arrangement of the first output mechanism 31, the connecting bracket 33, and the second output mechanism 32 along the same central axis makes the overall mass distribution of the dual-output shaft motor uniform, and the forces on both sides are balanced during operation, which helps to reduce vibration and uneven wear, and effectively improves the smoothness of operation and service life.

[0052] Furthermore, when the first output shaft 301 and the second output shaft 302 rotate in opposite directions, the rotational torques they generate are in opposite directions. According to the principle of mechanics, when two torques of equal magnitude and opposite direction act on the same straight line, partial or complete torque self-balancing can be achieved. This can significantly reduce the overall torsional force transmitted from the dual output shaft motor to the connecting bracket 33 and the dual-head fan during operation, and prevent the equipment from shaking, shifting or resonating due to the accumulation of unidirectional torque.

[0053] Furthermore, if the first fan impeller 21 and the second fan impeller 22 rotate in the same direction, the airflow near their outlets will rotate in the same direction, which can easily form vortices or airflow superposition in the middle area of ​​the two fans, resulting in uneven wind pressure and shortened air delivery distance. However, when the first output shaft 301 and the second output shaft 302 rotate in opposite directions, the rotation directions of the two fan impellers are opposite, which makes the direction of airflow rotation opposite as well. This can offset the angular momentum of the airflow to a certain extent and reduce air disturbance in the central area. This not only helps to form a straighter and more concentrated air jet and improve air delivery efficiency, but also avoids the problem of "uneven wind feel" caused by airflow turbulence, which is conducive to improving user comfort.

[0054] Furthermore, the traditional dual-output structure with co-rotation generates a continuous net torque during operation. This torque is transmitted to the motor mounting housing 1 and other components through the dual-output shaft motor. Over a long period of time, this can easily lead to loosening of the fixing screws, deformation of the bracket, or even cracking of the housing. However, this invention sets up reverse rotation so that the torques of the first output mechanism 31 and the second output mechanism 32 cancel each other out, greatly reducing the torsional load on the connecting bracket 33 and other components.

[0055] like Figures 1 to 11 The first output mechanism 31 shown includes a first stator mechanism 311 disposed on one side of the connecting bracket 33 and a first rotor mechanism 312 rotatable relative to the first stator mechanism 311. The first output shaft 301 is disposed on the first rotor mechanism 312 and extends away from the second output mechanism 32. The second output mechanism 32 includes a second stator mechanism 321 disposed on the other side of the connecting bracket 33 and a second rotor mechanism 322 rotatable relative to the second stator mechanism 321. The second output shaft 302 is disposed on the second rotor mechanism 322 and extends away from the first output mechanism 31.

[0056] Furthermore, the first stator mechanism 311 and the second stator mechanism 321 are respectively fixed on both sides of the connecting bracket 33. The first rotor mechanism 312 can rotate relative to the first stator mechanism 311, and the second rotor mechanism 322 can rotate relative to the second stator mechanism 321. The first output shaft 301 and the second output shaft 302 extend in opposite directions so that the components are distributed in an orderly manner in the axial direction, avoiding spatial interference and making the overall structure more compact. At the same time, sufficient space is reserved for connecting external components to the output shaft, improving the ease of installation.

[0057] Furthermore, the first stator mechanism 311 and the first rotor mechanism 312 cooperate independently, and the second stator mechanism 321 and the second rotor mechanism 322 cooperate independently. This facilitates the formation of complete drive units, which can control the operation status of both sides of the dual-head fan separately. The non-interfering structural design helps ensure that the operation of one set of mechanisms does not affect the other set, providing a stable structural foundation for individual or simultaneous operation and effectively meeting diverse usage needs.

[0058] Furthermore, the first output shaft 301 and the second output shaft 302 extend in opposite directions, which helps to reduce mutual interference between the two in power transmission, reduce energy loss caused by structural superposition, and the rotor mechanism directly drives the output shaft, shortening the force transmission path, making the power output more direct and efficient, and effectively enhancing the working performance of the equipment.

[0059] Furthermore, the first output mechanism 31 and the second output mechanism 32 are respectively disposed on both sides of the connecting bracket 33. The first stator mechanism 311 includes a first connecting seat 3112, and a first connecting mechanism 34 is provided between the first connecting seat 3112 and the connecting bracket 33. The first stator mechanism 311 is detachably connected to the connecting bracket 33 through the first connecting mechanism 34. Preferably, the structure of the first output mechanism 31 is the same as that of the second output mechanism 32, and the connection method between the first output mechanism 31 and the connecting bracket 33 is the same as that between the second output mechanism 32 and the connecting bracket 33. Specifically, the second stator mechanism 321 includes a second connecting seat 3212, and a second connecting mechanism is provided between the second connecting seat 3212 and the connecting bracket 33. The second stator mechanism 321 is detachably connected to the connecting bracket 33 through the second connecting mechanism. Furthermore, the structure of the second connecting mechanism is the same as that of the first connecting mechanism 34.

[0060] Furthermore, the first connecting mechanism 34 includes a first connecting through hole 341 provided on the first connecting seat 3112, a first connecting protrusion 342 provided on the connecting bracket 33, and a fastener 343 for connecting the first connecting through hole 341 and the first connecting protrusion 342. The first connecting protrusion 342 is provided with a first threaded hole 3421. The fastener 343 passes through the first connecting through hole 341 and is threadedly engaged with the first threaded hole 3421 to realize the detachable connection between the first connecting seat 3112 and the connecting bracket 33. Optionally, the fastener 343 can be a bolt, screw or other threaded fastener.

[0061] like Figures 1 to 11 The first stator mechanism 311 shown includes a first stator core and a first stator winding 3111 wound on the first stator core. The second stator mechanism 321 includes a second stator core and a second stator winding 3211 wound on the second stator core. The first output mechanism 31 includes a first end cover 313 located on the side of the first stator mechanism 311 away from the connecting bracket 33 and covering the outer periphery of the first stator winding 3111. The second output mechanism 32 includes a second end cover 314 located on the side of the second stator mechanism 321 away from the connecting bracket 33 and covering the outer periphery of the second stator winding 3211. Both the first end cover 313 and the second end cover 314 are provided with heat dissipation vents 315.

[0062] Furthermore, the first stator winding 3111 is wound on the first stator core. When energized, it generates a rotating magnetic field, which interacts with the first rotor mechanism 312 to achieve efficient electromagnetic drive. Similarly, the second stator winding 3211 is located on the second stator core. When energized, it generates a rotating magnetic field, which interacts with the second rotor mechanism 322 to achieve efficient electromagnetic drive. The structure is complete and the magnetic field path is clear, ensuring that the first output mechanism 31 and the second output mechanism 32 operate smoothly and the torque output is reliable, meeting the continuous power requirements of the dual-head fan.

[0063] Furthermore, the first end cover 313 and the second end cover 314 are respectively covered on the outer periphery of the first stator winding 3111 and the second stator winding 3211 to form a closed protective structure, which effectively prevents dust and foreign objects from entering the motor and avoids short circuits or wear of the windings, thus improving the reliability and service life of the motor in complex environments.

[0064] Furthermore, the heat dissipation vents 315 on the first end cover 313 and the second end cover 314 can form an air circulation channel to accelerate the dissipation of heat generated when the first stator winding 3111 and the second stator winding 3211 are working. When the motor is running, the heat is exchanged with the outside air through the heat dissipation vents 315, which prevents the heat from accumulating inside the first stator mechanism 311 and the second stator mechanism 321 and causing the temperature to be too high, thereby ensuring the stability of the winding insulation performance and preventing the motor operating efficiency from being affected or causing a fault due to overheating.

[0065] Optionally, the first end cover 313 and the second end cover 314 can be respectively covered on the outer periphery of the first stator winding 3111 and the second stator winding 3211 by means of threaded connection, snap connection, slot connection, etc. Preferably, the first end cover 313 and the second end cover 314 are both covered on the outer periphery of the first stator winding 3111 and the second stator winding 3211 by fasteners 343. Further, the fasteners 343 pass through the mounting ear plate, the first connecting through hole 341 and the first connecting protrusion 342 on the first end cover 313 in sequence, and are threadedly engaged with the first threaded hole 3421 on the first connecting protrusion 342, thereby fixing the first end cover 313. Similarly, the installation method of the second end cover 314 is the same as the installation method of the first end cover 313.

[0066] like Figures 1 to 11 A first air gap is provided between the first stator mechanism 311 and the first rotor mechanism 312, and a second air gap is provided between the second stator mechanism 321 and the second rotor mechanism 322. The first output mechanism 31 includes a first bearing 3131 disposed on the first end cover 313 and a second bearing 331 disposed on the connecting bracket 33. The two sides of the first output shaft 301 are rotatably mounted on the first bearing 3131 and the second bearing 331, respectively. The second output mechanism 32 includes a third bearing 3141 disposed on the second end cover 314 and a fourth bearing 332 disposed on the connecting bracket 33. The two sides of the second output shaft 302 are rotatably mounted on the third bearing 3141 and the fourth bearing 332, respectively.

[0067] Furthermore, the first air gap is set between the first stator mechanism 311 and the first rotor mechanism 312, and the second air gap is set between the second stator mechanism 321 and the second rotor mechanism 322, thereby forming the necessary magnetic circuit channel so that the magnetic field generated by the stator winding can effectively act on the rotor, while avoiding mechanical friction, ensuring the motor operates efficiently and smoothly, and improving energy conversion efficiency.

[0068] Furthermore, the first output shaft 301 is supported on both sides by the first bearing 3131 and the second bearing 331, respectively, and the second output shaft 302 is supported on both sides by the third bearing 3141 and the fourth bearing 332, respectively, forming a "two-point support" structure. This structure is beneficial to significantly improve the rigidity and bending resistance of the shaft system, helps to reduce flexural deformation during high-speed rotation, ensures smooth operation of the fan impeller, and effectively reduces vibration and noise.

[0069] Furthermore, the bearing can convert the sliding friction of the output shaft into rolling friction, which greatly reduces the frictional resistance between the rotor mechanism and the stator mechanism, end cover, and connecting bracket 33 when the rotor mechanism rotates, reduces the wear rate of components, and at the same time, the stable support reduces the risk of rotor and stator collision due to friction, effectively extending the overall service life of the motor.

[0070] like Figures 1 to 11 The oscillating drive mechanism 61 shown includes an oscillating drive motor 611 connected to the mounting bracket 4 and a drive gear 612 connected to the oscillating drive motor 611. The oscillating transmission mechanism 62 includes a fixed shaft 621 connected to the fixed bracket 5 and a fixed gear 622 connected to the fixed shaft 621. The drive gear 612 and the fixed gear 622 mesh. The oscillating drive motor 611 drives the drive gear 612 to rotate, so that the mounting bracket 4, which is fixedly connected to the drive gear 612, rotates relative to the fixed bracket 5.

[0071] Furthermore, the drive gear 612 is fixed on the output shaft of the oscillating drive motor 611, and the drive gear 612 meshes with the fixed gear 622. Since the fixed gear 622 is stationary, the rotation of the drive gear 612 is converted into the oscillating motion of the mounting bracket 4 relative to the fixed bracket 5. Furthermore, the protective cover 40 is provided on the drive gear 612 and the fixed gear 622. This design not only prevents dust, lint and other debris from entering the gear meshing area, but also prevents the lubricating oil of the drive gear 612 and the fixed gear 622 from splashing to the outside, thus improving the safety and service life of the dual-head fan.

[0072] like Figures 1 to 11 The protective cover 40 and the mounting bracket 4 shown form a mounting cavity 401 for accommodating the drive gear 612 and the fixed gear 622. The mounting bracket 4 has a mounting hole 41 on its lower side, and the fixed shaft 621 passes through the mounting hole 41 and connects to the fixed gear 622 in the mounting cavity 401.

[0073] Furthermore, existing dual-head fans typically place the drive gear 612 and fixed gear 622 on the support, separating them from other electrical components to avoid interference between the fan's other electrical components and the oscillation drive mechanism 61. In this invention, however, the drive gear 612 and fixed gear 622 are integrated with other components within the mounting support 4, effectively improving the compactness and overall integrity of the dual-head fan. The protective cover 40 has a dedicated mounting cavity 401 to accommodate the drive gear 612 and fixed gear 622, allowing the protective cover 40 to cover the upper side of the drive gear 612 and fixed gear 622, forming a closed or semi-closed space to prevent dust and lint from entering. The protective cover 40 effectively prevents the intrusion of debris such as lint and dust, thus solving the problem of easy interference between the drive gear 612 and the fixed gear 622 and other electrical components of the fan when they are placed inside the mounting bracket 4. Since the drive gear 612 and the fixed gear 622 are placed inside the mounting bracket 4, the protective cover 40 can also prevent the wires inside the mounting bracket 4 from being caught in the gear meshing area, effectively improving the safety of the fan. Furthermore, the mounting bracket 4 has a mounting hole 41 on its lower side for the fixed shaft 621 to pass through and connect with the fixed gear 622. The mounting hole 41 allows the fixed shaft 621 to pass through the mounting bracket 4 and connect with the fixed gear 622, ensuring the feasibility of connecting the fixed gear 622 and the fixed shaft 621.

[0074] Furthermore, the fixed gear 622 is provided with a wire hole, and the protective cover 40 is provided with a wire extension portion 403 extending towards the fixed gear 622 and passing through the wire hole. The wire extension portion 403 is provided with a wire hole 4031 for the wire to pass through. In this utility model, the wire hole is provided on the fixed gear 622 to guide the wire through and prevent the wire from interfering with the oscillating transmission mechanism 62 or being caught in the gear meshing area. The wire extension portion 403 extends from the protective cover 40 towards the fixed gear 622 and passes through the wire hole on the fixed gear 622, providing a safe passage for the wire.

[0075] Furthermore, the oscillating drive mechanism 61 includes a conductive ring for connecting the third switch 63 and the power cord. The third switch 63 is disposed in the motor mounting housing 1. The fixed shaft 621 has a conductive ring mounting groove 6211 for mounting the conductive ring on the side near the fixed gear 622. In this utility model, the conductive ring is used to connect the third switch 63 and the power cord. The conductive ring is composed of a rotor of rotating part and a stator of fixed part. The rotor is provided with a conductive metal ring, and the stator is provided with brushes. When the mounting bracket 4 rotates, the rotor drives the conductive metal ring to rotate. The brushes and the conductive metal ring continuously slide in contact, forming a stable current path. This ensures that the power supply and signal transmission can remain continuous when the mounting bracket 4 rotates relative to the fixed bracket 5. In addition, the design of the conductive ring solves the problem of wire entanglement caused by the rotation of the mounting bracket 4, allowing the mounting bracket 4 to rotate 360° without being restricted by the wire entanglement problem.

[0076] like Figures 1 to 11 The mounting bracket 4 shown is provided with a first mounting structure and a second mounting structure. The first mounting structure includes a first mounting part 42 for mounting the oscillating drive motor 611 and a second mounting part 43 for mounting the fixed shaft 621. The second mounting structure includes a third mounting part 44 for mounting the first switch 11 and the second switch 12.

[0077] Furthermore, the first mounting portion 42 includes a first extension portion 421 disposed on one side of the mounting support 4, forming a first mounting cavity 422 for mounting the oscillating drive motor 611. In this utility model, the first extension portion 421 is a portion extending outward from the mounting support 4, and together with the mounting support 4, forms the first mounting cavity 422 for mounting the oscillating drive motor 611. The shape of the first mounting cavity 422 matches the shape of the oscillating drive motor 611, and is usually cylindrical or rectangular, to ensure that the oscillating drive motor 611 can be firmly mounted. In addition, the first extension portion 421 can also separate the oscillating drive motor 611 from other electrical components and wires, avoiding interference between the oscillating drive motor 611 and other components.

[0078] Furthermore, the first extension 421 is provided with a first positioning part 4211 and a first connecting hole 4212. The oscillating drive motor 611 is provided with a first positioning hole 6111 that cooperates with the first positioning part 4211 and a second connecting hole 6112 that corresponds to the first connecting hole 4212. Fasteners pass through the first connecting hole 4212 and the second connecting hole 6112 to fix the oscillating drive motor 611 in the first mounting cavity 422. In this utility model, the first extension 421 is provided with a first positioning part 4211 and a first connecting hole 4212. The first positioning part 4211 is a protruding structure that can be inserted into the first positioning hole 6111 on the oscillating drive motor 611, thereby restricting the movement and rotation of the oscillating drive motor 611. Optionally, the fastener can be a screw or a bolt.

[0079] Furthermore, the second mounting portion 43 includes a mounting hole 41 provided on one side of the mounting support 4, and a second extension portion 431 provided around the mounting hole 41. The mounting hole 41 allows the fixed shaft 621 to pass through the mounting support 4 and connect with the second extension portion 431. In this utility model, the mounting hole 41 is the part for the fixed shaft 621 to pass through the mounting support 4, which is used to realize the positioning and installation of the fixed shaft 621. The second extension portion 431 provided around the mounting hole 41 is used to connect with the fixed shaft 621, providing a stable installation space for the fixed shaft 621. Optionally, the second extension portion 431 and the fixed shaft 621 can be connected by a tight fit, a snap-fit ​​or other fixing method to prevent the connection between the fixed shaft 621 and the second extension portion 431 from loosening.

[0080] Furthermore, the third mounting part 44 includes a third extension 441 located on one side of the mounting support 4. The third extension 441 is provided with a first positioning groove 4411 and a third connecting hole 4412. The first switch member 11 and the second switch member 12 are engaged in the first positioning groove 4411. The fastener is engaged with the third connecting hole 4412 and abuts against the first switch member 11 and the second switch member 12, so that the first switch member 11 and the second switch member 12 are respectively fixedly connected to the third extension 441. Furthermore, as a preferred embodiment of the present invention and not a limitation thereof, the first switch member 11 and the second switch member 12 are respectively connected to the first positioning groove 4411 to form two positioning points, which further improves the installation stability and reliability of the first switch member 11 and the second switch member 12.

[0081] Furthermore, the inner side of the second extension 431 is provided with a second mounting groove 4311 for the fifth bearing 71. The sidewall of the second mounting groove 4311 is provided with a plurality of protrusions 43111 distributed circumferentially thereon. The protrusions 43111 are tightly fitted and connected to the fifth bearing 71, so that the fifth bearing 71 is engaged in the second mounting groove 4311. In this utility model, the second mounting groove 4311 is the part for mounting the fifth bearing 71. The fifth bearing 71 is used to connect the fixed shaft 621 and the second extension 431, so that the mounting support 4 and the fixed shaft 621 are connected. The fixed shaft 621 can achieve relative rotation, while the design of the second mounting groove 4311 provides a dedicated mounting position for the fifth bearing 71 to ensure the correct relative position between the fifth bearing 71, the fixed shaft 621 and the second extension 431, and to avoid abnormal rotational noise or failure caused by the fifth bearing 71 shifting or loosening; furthermore, the protrusion 43111 is a plurality of small protrusion structures distributed circumferentially on the side wall of the second mounting groove 4311, used to achieve a tight fit connection between the fifth bearing 71 and the second mounting groove 4311.

[0082] Furthermore, the mounting bracket 4 is provided with a third mounting structure, which includes a first mounting post 72 located on one side of the mounting bracket 4. The first mounting post 72 is used to connect with the mating part 402 of the protective cover 40, so that the protective cover 40 and the first mounting post 72 are detachably connected. In this utility model, since electrical components such as the first switch 11, the second switch 12, and the fixed shaft 621 are integrated and installed on the mounting bracket 4, each electrical component and the wires connecting the electrical components are located in a common cavity. In order to ensure that the wires are not caught in the meshing area of ​​the drive gear 612 and the fixed gear 622, the protective cover 40 is provided to prevent dust, lint, and wires from entering the meshing area of ​​the drive gear 612 and the fixed gear 622. Optionally, the mating part 402 and the first mounting post 72 can be connected by screws or clips to fix the protective cover 40.

[0083] Furthermore, the second mounting part 43 includes a second mounting cavity 432 for mounting the capacitor 74, and the second mounting cavity 432 is provided with a second mounting post 4321 for fixing the capacitor 74. In this utility model, the second mounting cavity 432 is the space in the mounting support 4 for mounting the capacitor 74, and the second mounting cavity 432 is provided with a second mounting post 4321 for fixing the capacitor 74. The capacitor 74 can be fixedly connected to the second mounting post 4321 by using screws or clips.

[0084] The above examples are merely illustrative of the technical content of this utility model to facilitate reader understanding, but do not imply that the implementation of this utility model is limited to these embodiments. Any technical extensions or re-creations made based on this utility model are protected by this utility model. The scope of protection of this utility model is defined by the claims.

Claims

1. A dual-head fan, comprising a motor mounting housing (1), a dual-output shaft motor mounted inside the motor mounting housing (1), and a fan impeller assembly (2), characterized in that: The dual-output shaft motor includes a first output mechanism (31), a second output mechanism (32), and a connecting bracket (33). The first output mechanism (31) includes a first output shaft (301), and the second output mechanism (32) includes a second output shaft (302). The first output mechanism (31) and the second output mechanism (32) are respectively detachably installed on both sides of the connecting bracket (33). The fan impeller assembly (2) includes a first fan impeller (21) connected to the first output shaft (301) and a second fan impeller (22) connected to the second output shaft (302). The motor mounting housing (1) is provided with a first switch (11) and a second switch (12). The first switch (11) is electrically connected to the first output mechanism (31) to control the operating state of the first output shaft (301), and the second switch (12) is electrically connected to the second output mechanism (32) to control the operating state of the second output shaft (302).

2. A dual-head fan according to claim 1, characterized in that: The outer wall of the motor mounting housing (1) is provided with a receiving groove (13), and the receiving groove (13) is provided with a mosquito repellent bottle (14) containing mosquito repellent liquid. The heat generated by the dual output shaft motor when it is working is conducted through the motor mounting housing (1) to the mosquito repellent bottle (14) to heat the mosquito repellent liquid.

3. A dual-head fan according to claim 1, characterized in that: The motor mounting housing (1) includes a mounting bracket (4), a fixed bracket (5) is provided on one side of the mounting bracket (4), and a oscillating drive mechanism (61) and an oscillating transmission mechanism (62) are provided between the mounting bracket (4) and the fixed bracket (5). The oscillating drive mechanism (61) is connected to the mounting bracket (4), and the oscillating transmission mechanism (62) is connected to the fixed bracket (5). The mounting bracket (4) is also provided with a protective cover (40) covering the outer periphery of the oscillating drive mechanism (61) and the oscillating transmission mechanism (62). The oscillating drive mechanism (61) and the oscillating transmission mechanism (62) are connected in cooperation. The oscillating drive mechanism (61) drives the mounting bracket (4) to rotate relative to the fixed bracket (5).

4. A dual-head fan according to claim 1, characterized in that: The first output shaft (301) and the second output shaft (302) rotate in opposite directions.

5. A dual-head fan according to claim 4, characterized in that: The first output mechanism (31) includes a first stator mechanism (311) disposed on one side of the connecting bracket (33) and a first rotor mechanism (312) rotatable relative to the first stator mechanism (311). The first output shaft (301) is disposed on the first rotor mechanism (312) and extends away from the second output mechanism (32). The second output mechanism (32) includes a second stator mechanism (321) disposed on the other side of the connecting bracket (33) and a second rotor mechanism (322) rotatable relative to the second stator mechanism (321). The second output shaft (302) is disposed on the second rotor mechanism (322) and extends away from the first output mechanism (31).

6. A dual-head fan according to claim 5, characterized in that: The first stator mechanism (311) includes a first stator core and a first stator winding (3111) wound on the first stator core. The second stator mechanism (321) includes a second stator core and a second stator winding (3211) wound on the second stator core. The first output mechanism (31) includes a first end cap (313) located on the side of the first stator mechanism (311) away from the connecting bracket (33) and covering the outer periphery of the first stator winding (3111). The second output mechanism (32) includes a second end cap (314) located on the side of the second stator mechanism (321) away from the connecting bracket (33) and covering the outer periphery of the second stator winding (3211). Both the first end cap (313) and the second end cap (314) are provided with heat dissipation vents (315).

7. A dual-head fan according to claim 6, characterized in that: A first air gap is provided between the first stator mechanism (311) and the first rotor mechanism (312), and a second air gap is provided between the second stator mechanism (321) and the second rotor mechanism (322). The first output mechanism (31) includes a first bearing (3131) disposed on the first end cover (313) and a second bearing (331) disposed on the connecting bracket (33). The two sides of the first output shaft (301) are rotatably mounted on the first bearing (3131) and the second bearing (331), respectively. The second output mechanism (32) includes a third bearing (3141) disposed on the second end cover (314) and a fourth bearing (332) disposed on the connecting bracket (33). The two sides of the second output shaft (302) are rotatably mounted on the third bearing (3141) and the fourth bearing (332), respectively.

8. A dual-head fan according to claim 3, characterized in that: The oscillating drive mechanism (61) includes an oscillating drive motor (611) connected to the mounting bracket (4) and a drive gear (612) connected to the oscillating drive motor (611). The oscillating transmission mechanism (62) includes a fixed shaft (621) connected to the fixed bracket (5) and a fixed gear (622) connected to the fixed shaft (621). The drive gear (612) and the fixed gear (622) mesh. The oscillating drive motor (611) drives the drive gear (612) to rotate, so that the mounting bracket (4) fixedly connected to the drive gear (612) rotates relative to the fixed bracket (5).

9. A dual-head fan according to claim 8, characterized in that: A mounting cavity (401) for accommodating the drive gear (612) and the fixed gear (622) is formed between the protective cover (40) and the mounting bracket (4). The mounting bracket (4) has a mounting hole (41) on its lower side. The fixed shaft (621) passes through the mounting hole (41) and connects to the fixed gear (622) in the mounting cavity (401).

10. A dual-head fan according to claim 8, characterized in that: The mounting bracket (4) is provided with a first mounting structure and a second mounting structure. The first mounting structure includes a first mounting part (42) for mounting the oscillating drive motor (611) and a second mounting part (43) for mounting the fixed shaft (621). The second mounting structure includes a third mounting part (44) for mounting the first switch (11) and the second switch (12).

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