Waterproof fan

Abstract

This application relates to a waterproof fan, including a fan head. The fan head includes a fan head housing having a receiving cavity and a first connecting hole and a second connecting hole communicating with the receiving cavity. A motor is disposed within the receiving cavity, and its rotating shaft passes through the first connecting hole and extends to the outside of the receiving cavity to connect with fan blades. A first sealing ring is sleeved on the outer periphery of the rotating shaft and abuts against the fan head housing and the motor to seal the first connecting hole. A motor assembly is disposed within the receiving cavity and spaced apart from the motor to drive the fan head housing to rotate. The motor assembly has a support shaft passing through the second connecting hole. An oscillating transmission component is drively connected to the motor assembly. The oscillating transmission component has an inner sleeve that passes through the second connecting hole and is sleeved on the support shaft. The inner sleeve and the support shaft are interference-fitted to form a sealing fit. By using multiple sets of sealing components, the interior and exterior of the fan head are sealed and isolated, preventing water seepage from multiple angles and optimizing waterproof performance to meet the user's need for direct washing without disassembly.

Description

Technical Field

[0001] This application relates to the field of household appliance technology, and more particularly to a waterproof fan. Background Technology

[0002] In the existing technology, fans are commonly used ventilation and heat dissipation devices. After long-term use, dust, oil and other stains can easily accumulate on the fan blades, fan head housing and other parts. Regular cleaning is required to ensure hygiene and ventilation efficiency.

[0003] To achieve basic protection, some fans have simple seals at the joints of the housing. However, due to imperfect sealing designs at points such as the motor shaft penetrating the housing, the mating of the oscillating transmission component and the support shaft, and the gaps in the housing joints, their waterproof performance is limited. When cleaning the fan, direct water rinsing can easily allow water to enter the housing through these gaps, causing short circuits in the motor, damage to the PCB board, or corrosion of the motor components, thus affecting the fan's lifespan. Therefore, users have to disassemble the fan blades, housing, and other components for cleaning, which is not only cumbersome but also prone to wear and tear on components, reduced installation accuracy, and even assembly errors that can cause the fan to malfunction.

[0004] In other words, the process of disassembling and cleaning the fan head is time-consuming and laborious, and there is a risk of damaging the equipment, making it difficult to meet the demand for convenient and efficient fan cleaning. Utility Model Content

[0005] This application provides a waterproof fan that uses multiple sets of sealing components to seal and isolate the inside and outside of the fan head, preventing water seepage from multiple angles and optimizing waterproof performance. This enables the fan to be rinsed directly under a tap without disassembling any part, thus meeting the user's need for direct water washing without disassembly.

[0006] Therefore, this application provides a waterproof fan, including a fan head, the fan head comprising:

[0007] The fan head housing has a receiving cavity and a first connecting hole and a second connecting hole communicating with the receiving cavity;

[0008] The motor is located inside the receiving cavity; the motor shaft passes through the first connecting hole and extends outside the receiving cavity to connect with the fan blades;

[0009] The first sealing ring is fitted around the outer circumference of the rotating shaft and abuts against the fan head housing and the motor to seal the first connection hole;

[0010] A motor assembly is disposed within the receiving cavity and spaced apart from the motor to drive the fan head housing to rotate; the motor assembly is provided with a support shaft, which passes through the second connecting hole;

[0011] A swaying transmission component is connected to the motor assembly for transmission; the swaying transmission component is provided with an inner sleeve, which passes through the second connecting hole and is sleeved on the support shaft; and the inner sleeve is interference-fitted with the support shaft to form a sealing fit.

[0012] As a preferred embodiment, the fan head housing includes a front housing assembly and a rear housing assembly, the front housing assembly and the rear housing assembly being detachably connected and forming the receiving cavity; the front housing assembly is provided with a first connecting hole; the rear housing assembly is provided with a second connecting hole; and a second sealing ring is provided between the front housing assembly and the rear housing assembly.

[0013] As a preferred embodiment, the first sealing ring comprises, in sequence along the axial direction of the rotating shaft:

[0014] The first abutting part has its inner circumferential surface interlocked with the rotating shaft to form a radial seal, and its end face is pressed against the end cover of the motor to form an end face seal.

[0015] The connecting part passes through the first connecting hole and forms an axial interference fit with the inner wall of the first connecting hole;

[0016] The second abutting part is set at an angle to the connecting part, and its end face forms a beveled press seal with the front shell assembly.

[0017] As a preferred embodiment, the diameter of the first abutting portion is greater than the diameter of the first connecting hole, the diameter of the connecting portion is greater than or equal to the diameter of the first connecting hole, and the diameter of the first abutting portion is greater than the diameter of the connecting portion.

[0018] As a preferred embodiment, the connecting portion has an arc-shaped structure that is recessed towards the rotating shaft on the side opposite to the rotating shaft.

[0019] As a preferred embodiment, the motor assembly includes:

[0020] A motor bracket is disposed within the receiving cavity; the motor bracket has the support shaft on the side opposite to the synchronous motor, and the motor bracket has a third connecting hole;

[0021] A synchronous motor, wherein the shaft of the synchronous motor passes through the third connecting hole, and the shaft is connected to the oscillating transmission component via a crank;

[0022] The third sealing ring is sleeved on the outer periphery of the shaft of the synchronous motor and embedded in the inner wall of the third connecting hole, and abuts against the motor bracket and the shaft to seal the third connecting hole.

[0023] As a preferred embodiment, the front housing assembly has a first mounting groove on the side facing the motor bracket, and the rear housing assembly has a first protrusion coaxially arranged with the first mounting groove on the side facing the motor bracket; the motor bracket has a first flange and a second groove on its axial sides respectively.

[0024] The engagement of the first flange with the first mounting groove and the engagement of the first protrusion with the second groove form a bidirectional axial limit on the motor bracket.

[0025] As a preferred embodiment, a fourth sealing ring is also included, the fourth sealing ring comprising an integrally formed first sub-sealing ring and a second sub-sealing ring; the first sub-sealing ring is disposed between the first flange and the first mounting groove to seal the mating gap of the first mounting groove; the second sub-sealing ring is disposed between the first protrusion and the second groove to seal the mating gap of the second groove.

[0026] As a preferred embodiment, the front shell assembly is further provided with a first sealing groove, and the second sealing ring is embedded in the first sealing groove and abuts against the front shell assembly and the rear shell assembly to seal the gap between the front shell assembly and the rear shell assembly.

[0027] As a preferred embodiment, the system also includes a PCB board disposed within the receiving cavity and electrically connected to the motor, the synchronous motor, and the oscillating transmission component.

[0028] The beneficial effects of this application are:

[0029] The waterproof fan includes a fan head, which comprises a fan head housing, a motor, a second sealing ring, a motor assembly, and an oscillating transmission component. The fan head housing has a receiving cavity and a first connecting hole and a second connecting hole communicating with the receiving cavity. The motor is disposed within the receiving cavity. The motor's rotating shaft passes through the first connecting hole and extends outside the receiving cavity to connect with the fan blades. The first sealing ring is sleeved on the outer periphery of the rotating shaft and abuts against the fan head housing and the motor to seal the first connecting hole. The motor assembly is disposed within the receiving cavity and spaced apart from the motor to drive the fan head housing to rotate. The motor assembly has a support shaft that passes through the second connecting hole. The oscillating transmission component is drively connected to the motor assembly. The oscillating transmission component has an inner sleeve that passes through the second connecting hole and is sleeved on the support shaft. The inner sleeve and the support shaft are interference-fitted to form a sealing fit.

[0030] The first sealing ring, fitted around the outer circumference of the rotating shaft, is interference-fitted with the shaft. It fills the gap between the rotating shaft and the first connecting hole through radial compression, providing a radial seal to prevent axial water penetration. The first sealing ring also abuts axially between the fan head housing and the motor, being compressed by the fan head housing and motor end faces to form an end face seal. This double seal prevents moisture from seeping into the receiving cavity from the first connecting hole. The inner sleeve of the oscillating transmission component is fitted onto the support shaft, with an interference fit between them. This interference fit generates radial pressure, eliminating clearance and preventing moisture from seeping in along the support shaft. Furthermore, since the inner sleeve itself penetrates the second connecting hole, its interference fit with the support shaft simultaneously blocks the channel between the second connecting hole and the support shaft. The axial displacement generated by the oscillating motion is absorbed by the interference fit between the inner sleeve and the support shaft to prevent seal failure. Additionally, because the rotating shaft seal needs to adapt to the motor's rotational motion, the first sealing ring is made of a wear-resistant elastic material. The support shaft seal achieves a static seal through a rigid interference fit, ensuring sealing reliability during oscillation.

[0031] In other words, by using multiple sets of sealing components, the housing cavity of the fan head is sealed and isolated from the outside to prevent water leakage from multiple angles, optimize waterproof performance, and enable a waterproof fan that can be rinsed directly under the tap without disassembling any part, thus meeting the user's need for direct water washing without disassembly. Attached Figure Description

[0032] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0033] Figure 1 This is a structural diagram of the fan head in a waterproof fan according to this application;

[0034] Figure 2 for Figure 1 Exploded structure diagram;

[0035] Figure 3 for Figure 1 Cross-sectional structural diagram;

[0036] Figure 4 for Figure 3 A magnified view of part A in the image;

[0037] Figure 5 for Figure 3 A magnified view of part B in the image;

[0038] Figure 6 for Figure 3 A magnified view of part C.

[0039] Explanation of reference numerals in the attached figures:

[0040] 2. Front housing assembly; 21. First connecting hole; 22. Waterproof end cap; 3. Second sealing ring; 4. First sealing ring; 41. First abutting part; 42. Second abutting part; 43. Connecting part; 5. Motor; 51. Rotating shaft; 6. PCB board; 7. Rear housing assembly; 71. Second connecting hole; 8. Synchronous motor; 81. Shaft core; 9. Third sealing ring; 10. Crank; 11. Motor bracket; 111. Third connecting hole; 112. Second groove; 113. Support shaft; 12. Oscillating transmission component; 121. Inner sleeve. Detailed Implementation

[0041] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0042] The following disclosure provides numerous different embodiments or examples for implementing various structures of this application. To simplify the disclosure, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the scope of this application. Furthermore, reference numerals and / or letters may be repeated in different examples. Such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed.

[0043] like Figures 1 to 6As shown, this application provides a waterproof fan, including a fan head, which includes a fan head housing, a motor 5, a second sealing ring 3, a motor assembly, and an oscillation transmission component 12; the fan head housing has a receiving cavity and a first connecting hole 21 and a second connecting hole 71 communicating with the receiving cavity; the motor 5 is disposed in the receiving cavity; preferably, the motor 5 is a DC motor 5; the rotating shaft 51 of the motor 5 passes through the first connecting hole 21 and extends to the outside of the receiving cavity to connect with the fan blades; the first sealing ring 4 is sleeved on the outer periphery of the rotating shaft 51 and abuts against the fan head housing and the receiving cavity. Between the motors 5, the first connecting hole 21 is sealed; the motor assembly is disposed in the receiving cavity and spaced apart from the motors 5 to drive the fan head housing to rotate; the motor assembly is provided with a support shaft 113, which passes through the second connecting hole 71; the oscillating transmission component 12 is connected to the motor assembly; the oscillating transmission component 12 is provided with an inner sleeve 121, which passes through the second connecting hole 71 and is fitted onto the support shaft 113; and the inner sleeve 121 and the support shaft 113 are interference-fitted to form a sealing fit. Preferably, the inner sleeve 121 and the support shaft 113 may also be provided with a fifth sealing ring, such as an O-ring, to further improve the waterproof reliability between the support shaft 113 and the inner sleeve 121.

[0044] The first sealing ring 4, fitted around the outer circumference of the rotating shaft 51, is interference-fitted with the rotating shaft 51. It fills the gap between the rotating shaft 51 and the first connecting hole 21 through radial compression, thus providing a radial seal and preventing water from penetrating axially. The first sealing ring 4 also abuts axially between the fan head housing and the motor 5, and is compressed by the end faces of the fan head housing and the motor 5, forming an end-face seal. This double seal prevents water from seeping into the receiving cavity from the first connecting hole 21. The inner sleeve 121 of the oscillating transmission component 12 is fitted onto the support shaft 113, and the two are interference-fitted. That is, the inner sleeve 121 and the support shaft 113 generate radial... The pressure eliminates the clearance and prevents moisture from seeping in along the support shaft 113; and since the inner sleeve 121 itself passes through the second connecting hole 71, its interference fit with the support shaft 113 simultaneously blocks the channel between the second connecting hole 71 and the support shaft 113; the axial displacement generated by the oscillating motion is absorbed by the interference fit between the inner sleeve 121 and the support shaft 113 to avoid seal failure; in addition, since the seal of the rotating shaft 51 needs to adapt to the rotational motion of the motor 5, the first sealing ring 4 is made of wear-resistant elastic material; the support shaft 113 seal achieves static sealing through rigid interference fit, ensuring the reliability of the seal during oscillation.

[0045] In other words, the housing cavity is isolated from the outside through multiple sealing points, such as the first connecting hole 21 and the second connecting hole 71 in the fan head. This is achieved by perfecting the sealing structure of two key components in the fan head: the motor 5 shaft 51 and the oscillation transmission component 12, and the synchronous motor 8. This effectively prevents moisture from entering the housing cavity, protecting the internal motor 5, PCB board 6, and motor components from moisture or water stains. This multi-level sealing provides a waterproof effect, reduces the failure rate, and extends the overall lifespan of the fan. Furthermore, users can directly rinse the fan head with water without frequently disassembling internal components, thus avoiding component wear, decreased installation accuracy, or assembly errors caused by repeated disassembly and reassembly; simplifying the cleaning process and improving convenience and efficiency.

[0046] In other words, by using multiple sets of sealing components, the inside and outside of the fan head are sealed and isolated to prevent water leakage from multiple angles, optimize waterproof performance, and enable a waterproof fan that can be rinsed directly under a tap without disassembling any part, thus meeting the user's need for direct water washing without disassembly.

[0047] In this embodiment, as Figure 4 As shown, the fan head housing includes a front housing assembly 2 and a rear housing assembly 7. The front housing assembly 2 and the rear housing assembly 7 are detachably connected and enclose the receiving cavity. The front housing assembly 2 is provided with a first connecting hole 21. The rear housing assembly 7 is provided with a second connecting hole 71. A second sealing ring 3 is provided between the front housing assembly 2 and the rear housing assembly 7. Preferably, the second sealing ring 3 is a silicone ring.

[0048] The cooperation between the front shell assembly 2, the rear shell assembly 7, and the second sealing ring 3 primarily aims to seal the splicing gaps within the fan head housing itself, further enhancing the overall waterproofing system of the fan head. Specifically, during the processing or assembly of the front shell assembly 2 and the rear shell assembly 7, there may be slight flatness errors or assembly gaps on the mating surfaces. These are unavoidable potential water ingress paths during the shell splicing. Therefore, when the second sealing ring 3 is compressed, its elastic deformation completely fills these gaps, forming a continuous sealing barrier that blocks external water from seeping into the receiving cavity from the shell splicing. In other words, the second sealing ring 3 solves the sealing problem caused by the detachable connection between the front and rear shells by filling the splicing gaps through elastic deformation. Furthermore, it complements the first sealing ring 4 for the first connecting hole 21 and the interference fit between the inner sleeve 121 and the support shaft 113 for the second connecting hole 71. Together, these three elements cover all possible water ingress paths (hole-shaft gaps, shell splicing gaps), forming comprehensive waterproof protection and ensuring that core components such as the motor 5 and motor assembly within the receiving cavity of the fan head are not corroded by external water.

[0049] In this embodiment, as Figure 5As shown, the first sealing ring 4 includes a first abutting part 41, a connecting part 43, and a second abutting part 42 in sequence along the axial direction of the rotating shaft 51; preferably, the first sealing ring 4 is a water seal, and its material is nitrile VA; the inner circumferential surface of the first abutting part 41 is press-fitted with the rotating shaft 51 to form a radial seal, and its end face is pressed against the end cover of the motor 5 to form an end face seal; the connecting part 43 passes through the first connecting hole 21 and forms an axial interference fit with the inner wall of the first connecting hole 21; the second abutting part 42 is set at an angle to the connecting part 43, and its end face forms a beveled press-fit seal with the front shell assembly 2.

[0050] Among them, the first abutting part 41, the connecting part 43 and the second abutting part 42 of the first sealing ring 4 form multiple sealing paths through their respective structural designs and matching relationships, and jointly achieve the waterproof effect. Specifically, the inner circumferential surface of the first abutting part 41 is interference-fitted with the rotating shaft 51, and the radial gap between the two is eliminated by the tight radial compression, forming a radial seal to prevent water from seeping in along the gap between the surface of the rotating shaft 51 and the sealing ring; at the same time, its end face is directly pressed with the end cover of the motor 5, and the axial gap between the two is eliminated by the axial pressure, forming an end face seal to block water from entering from the contact surface between the end cover of the motor 5 and the sealing ring. In this way, the two possible water ingress channels of radial gap between the rotating shaft 51 and the sealing ring and axial gap between the sealing ring and the end cover of the motor 5 can be solved at the same time, thereby realizing that the first abutting part 41 blocks the gap between the rotating shaft 51 and the end cover of the motor 5. The connecting part 43 passes through the first connecting hole 21 of the fan head housing and forms an axial interference fit with the inner wall of the first connecting hole 21. That is, the connecting part 43 is tightly pressed against the hole wall in the axial direction, eliminating the gap between the sealing ring and the housing hole wall, forming a circumferential seal. This prevents water from seeping into the receiving cavity from the outside of the fan head housing through the gap between the first connecting hole 21 and the first sealing ring 4, thus allowing the connecting part 43 to block the gap between the sealing ring and the fan head housing. The second abutting part 42 is set at an angle to the connecting part 43. Preferably, the second abutting part 42 and the connecting part 43 form a certain inclination angle, and its end face forms a beveled press-fit with the front housing assembly 2. The angled design gives the second abutting part 42 a certain elasticity. During pressing, the tight contact of the beveled surface can increase the sealing area. At the same time, the pressure of the beveled surface enhances the sealing reliability, eliminates the gap between the sealing ring and the front housing assembly 2, and forms a beveled seal. Thus, the second abutting part 42 blocks the gap between the first sealing ring 4 and the front housing assembly 2, further preventing the possibility of external water seeping in through this path.

[0051] In other words, the three parts of the first sealing ring 4 form a seal for each possible gap between the rotating shaft 51, the end cover of the motor 5, the fan head housing, and the front housing assembly 2 through multiple sealing cooperation in the radial, axial, circumferential and inclined directions. This ultimately achieves complete waterproofing of the first connecting hole 21 and prevents external water from entering the receiving cavity in the fan head and affecting the operation of components such as the motor 5.

[0052] In this embodiment, the diameter of the first abutment portion 41 is larger than the diameter of the first connecting hole 21, which means that it cannot pass through the first connecting hole 21 and will be naturally limited to the inner side of the fan head housing, that is, the side closer to the motor 5. That is, when the motor 5 is assembled with the fan head housing, the end cover of the motor 5 will apply axial pressure to the first abutment portion 41, and the edge of the first connecting hole 21 will form a reverse support for the first abutment portion 41. This bidirectional compression will force the first abutment portion 41 to undergo elastic deformation, so that its end face is tightly fitted with the end cover of the motor 5, while the inner circumferential surface is further pressed against the rotating shaft 51. In other words, by restricting the structure that cannot pass into the hole, it is ensured that the first abutment portion 41 will necessarily be subjected to sufficient axial pressure, thereby ensuring the pre-tightening force of the end face seal and radial seal, and avoiding seal failure due to loose assembly. The diameter of the connecting part 43 is greater than or equal to the diameter of the first connecting hole 21. When the diameter of the connecting part 43 is slightly larger than that of the first connecting hole 21, the connecting part 43 will undergo radial deformation due to pressure from the hole wall during assembly, causing its outer circumferential surface to fit tightly against the inner wall of the first connecting hole 21, eliminating gaps and forming a circumferential seal. Even if the diameter is equal to that of the first connecting hole 21, the machining accuracy of the mating surfaces will still create a tight contact through assembly pressure, and the elasticity of the connecting part 43 itself will achieve a seal. In this way, it is ensured that the connecting part 43 can fill the radial space of the first connecting hole 21, blocking the path of water seeping in from between the hole wall and the sealing ring. Furthermore, the diameter of the first abutment portion 41 is larger than the diameter of the connecting portion 43. The larger diameter of the first abutment portion 41 provides a larger end face area for pressing against the motor 5 end cover, enhancing the stability of the end face seal. The diameter of the connecting portion 43 is relatively smaller, but still larger than the first connecting hole 21, which satisfies the interference fit with the hole wall while avoiding assembly difficulties due to excessive diameter. It should be noted that if the diameter of the connecting portion 43 is the same as that of the first abutment portion 41, it will be difficult to install when inserted into the first connecting hole 21 due to excessive interference. This creates a positioning step during assembly, preventing the sealing ring from excessively extending into the first connecting hole 21, ensuring that the first abutment portion 41, the connecting portion 43, and the second abutment portion 42 are each in a preset sealing position, ensuring the synergistic effect of multiple seals.

[0053] In this embodiment, the connecting portion 43 has an arc-shaped structure that is recessed towards the rotating shaft 51 on the side opposite to the rotating shaft 51. When the connecting portion 43 is inserted into the first connecting hole 21, the hole wall exerts radial pressure on the connecting portion 43. Since the connecting portion 43 is an inwardly recessed arc shape on the side opposite to the rotating shaft 51, the material in this area can shrink and deform towards the recess, while forcing the outer peripheral surface of the connecting portion 43 (the side in contact with the hole wall) to fit more tightly against the hole wall. Especially when there are minor processing errors in the inner wall of the first connecting hole 21, such as local unevenness, the elastic deformation of the arc-shaped structure can adaptively fill these minute gaps, avoiding local sealing failure caused by rigid contact, thereby enhancing the reliability of the circumferential seal. In addition, the interference design of the connecting part 43 having a diameter greater than or equal to the diameter of the first connecting hole 21 can ensure a seal, but may also increase assembly resistance; the arc-shaped concave structure can limit the connecting part 43 from excessively penetrating the first connecting hole 21, ensuring a close and sealing effect; at the same time, the arc-shaped buffering characteristic can disperse the squeezing force during assembly, preventing the connecting part 43 from tearing or permanently deforming due to excessive force, ensuring the integrity and durability of the sealing structure in the fan head.

[0054] In this embodiment, as Figure 2 As shown, the motor assembly includes a motor bracket 11, a synchronous motor 8, and a third sealing ring 9. The motor bracket 11 is disposed within the receiving cavity. The motor bracket 11 has a support shaft 113 on the side opposite to the synchronous motor 8, and the motor bracket 11 has a third connecting hole 111. The shaft core 81 of the synchronous motor 8 passes through the third connecting hole 111, and the shaft core 81 is connected to the oscillating transmission component 12 via a crank 10 to realize the fan oscillation function. The third sealing ring 9 is sleeved on the outer periphery of the shaft core 81 of the synchronous motor 8, and is embedded in the inner wall of the third connecting hole 111, and abuts against the motor bracket 11 and the shaft core 81 to seal the third connecting hole 111. Preferably, the third sealing ring 9 consists of two sealing rings, upper and lower, to further improve the sealing and waterproofing effect between the synchronous motor 8 and the motor bracket 11 in the fan head.

[0055] The third sealing ring 9 is sleeved on the outer circumference of the shaft core 81. Its inner diameter is usually slightly smaller than the diameter of the shaft core 81 to form an interference fit. It uses elastic deformation to tightly fit the surface of the shaft core 81, eliminating the radial gap between the two and preventing water from flowing along the surface of the shaft core 81. The third sealing ring 9 is embedded in the inner wall of the third connecting hole 111. Preferably, the hole wall has an annular groove to adapt to the third sealing ring 9. Its outer diameter forms an interference fit or tight fit with the hole wall, and at the same time abuts against the motor bracket 11 to ensure the continuous effectiveness of radial and circumferential sealing. This avoids the seal from loosening due to the small displacement caused by the rotation of the shaft core 81, eliminates the gap between the sealing ring and the hole wall, and blocks water from seeping in from the hole wall side. In this way, the third sealing ring 9 achieves the sealing of the gap between the shaft core 81 of the synchronous motor 8 and the motor bracket 11 through the bidirectional abutment and embedded fixed structure. In other words, the third sealing ring 9, through radial interference fit with the shaft core 81, circumferential fitting fit with the third connecting hole 111, and axial pre-tightening limit design, seals the gap between the synchronous motor 8 shaft core 81 and the motor bracket 11 without affecting the rotation function of the shaft core 81.

[0056] In this embodiment, the front housing assembly 2 has a first mounting groove on the side facing the motor bracket 11, and the rear housing assembly 7 has a first protrusion coaxially arranged with the first mounting groove on the side facing the motor bracket 11; the motor bracket 11 has a first flange and a second groove 112 on its axial sides respectively; wherein, the cooperation between the first flange and the first mounting groove and the engagement between the first protrusion and the second groove 112 form a bidirectional axial limit on the motor bracket 11.

[0057] The front housing assembly 2 has a first mounting groove on the side facing the motor bracket 11, and the axial end of the motor bracket 11 facing this side has a first flange. During assembly, the first flange is embedded in the first mounting groove, and the end face of the first flange is in close contact with the bottom or inner wall of the first mounting groove. The rear housing assembly 7 has a first protrusion on the side facing the motor bracket 11, and the axial end of the motor bracket 11 facing this side has a second groove 112, and the first protrusion is coaxially arranged with the first mounting groove. During assembly, the first protrusion is inserted into the second groove 112, and the end face of the protrusion is in close contact with the bottom of the groove. In other words, the engagement of the first flange with the first mounting groove and the engagement of the first protrusion with the second groove 112 together form a bidirectional axial lock on the motor bracket 11, avoiding axial tilting or uneven local force caused by assembly eccentricity.

[0058] In this embodiment, as Figure 6As shown, it also includes a fourth sealing ring, which includes an integrally formed first sub-sealing ring and a second sub-sealing ring; the first sub-sealing ring is disposed between the first flange and the first mounting groove to seal the mating gap of the first mounting groove; the second sub-sealing ring is disposed between the first protrusion and the second groove 112 to seal the mating gap of the second groove 112.

[0059] The second sub-seal ring is integrally formed with the first sub-seal ring. The axial pressure of the front shell assembly 2 and the motor bracket 11 will squeeze the first and second sub-seal rings, causing them to undergo elastic deformation and completely fill the above-mentioned mating gap, forming a continuous sealing barrier. This seals the mating gap between the motor bracket 11 and the front shell assembly 2 and the rear shell assembly 7, blocking the path of water seeping into the receiving cavity from the mating point. This further improves the overall waterproof system of the fan head, achieving all-round waterproof sealing of the receiving cavity and ensuring the safe operation of core components such as the motor 5 and the synchronous motor 8 in the fan head.

[0060] In this embodiment, the front shell assembly 2 is further provided with a first sealing groove, and the second sealing ring 3 is embedded in the first sealing groove and abuts against the front shell assembly 2 and the rear shell assembly 7 to form a continuous and uninterrupted sealing barrier, blocking the path of external water from the shell splice into the receiving cavity, so as to seal the gap between the front shell assembly 2 and the rear shell assembly 7.

[0061] In this embodiment, as Figure 2 As shown, it also includes a PCB board 6, which is disposed within the receiving cavity and is electrically connected to the motor 5, the synchronous motor 8, and the oscillating transmission component 12, respectively. The integrally sealed receiving cavity in the fan head provides a physical barrier for the PCB board 6, preventing external water from directly contacting the PCB board 6 and reducing the generation of internal condensate.

[0062] In this embodiment, the front shell assembly 2 is provided with a waterproof end cap 22 on the side opposite to the receiving cavity, and completely covers the connection part 43 between the rotating shaft 51 and the fan blade, preventing external water from directly contacting the rotating shaft 51 and the fan blade connection structure. The waterproof end cap 22, as the first line of defense, significantly reduces the amount and pressure of water reaching the first connection hole 21, reducing the sealing load on the first sealing ring 4. When the fan faces splashing or rain, the waterproof end cap 22 directly intercepts most of the water flow through its own shell structure, preventing water from directly impacting the connection point between the rotating shaft 51 and the front shell assembly 2, reducing the possibility of water seeping into the interior from the source. Even if a small amount of water breaks through the end cap, such as seeping in through the edge gaps of the end cap, the internal first sealing ring 4 can still block water from entering the receiving cavity through radial and end face sealing structures. The combination of the two significantly improves the overall waterproof reliability. In other words, the waterproof end cap 22, through external physical isolation, not only directly blocks most of the external water, but also forms a protective complement with the internal sealing ring, further reducing the risk of water seeping into the receiving cavity.

[0063] In other words, this application systematically improves the waterproofing of the fan head by using a multi-seal structure to achieve waterproofing of the motor 5 in the fan head, the oscillation transmission component, the housing seam seal, and the PCB board 6 waterproof encapsulation, thus fully realizing waterproof performance of IPX4 and above, thereby meeting the user's need to wash directly with water without disassembly.

[0064] In the above embodiments, the descriptions of each embodiment have different focuses. For parts that are not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0065] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0066] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0067] Obviously, those skilled in the art can make various modifications and variations to this application without departing from the spirit and scope of this application. Since these modifications and variations fall within the scope of the claims and their equivalents, this application also intends to include these modifications and variations.

[0068] The above description describes specific embodiments of this application, but the scope of protection of this application is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this application, and these modifications or substitutions should all be covered within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A waterproof fan, comprising a fan head, characterized in that, The fan head includes: The fan head housing has a receiving cavity and a first connecting hole and a second connecting hole communicating with the receiving cavity; The motor is located inside the receiving cavity; the motor shaft passes through the first connecting hole and extends outside the receiving cavity to connect with the fan blades; The first sealing ring is fitted around the outer circumference of the rotating shaft and abuts against the fan head housing and the motor to seal the first connection hole; A motor assembly is disposed within the receiving cavity and spaced apart from the motor to drive the fan head housing to rotate; the motor assembly is provided with a support shaft, which passes through the second connecting hole; A swaying transmission component is connected to the motor assembly for transmission; the swaying transmission component is provided with an inner sleeve, which passes through the second connecting hole and is sleeved on the support shaft; and the inner sleeve is interference-fitted with the support shaft to form a sealing fit.

2. The waterproof fan according to claim 1, characterized in that, The fan head housing includes a front housing assembly and a rear housing assembly, the front housing assembly and the rear housing assembly are detachably connected and surround to form the receiving cavity; the front housing assembly is provided with a first connecting hole, the rear housing assembly is provided with a second connecting hole, and a second sealing ring is provided between the front housing assembly and the rear housing assembly.

3. The waterproof fan according to claim 2, characterized in that, The first sealing ring comprises, in sequence along the axial direction of the rotating shaft: The first abutting part has its inner circumferential surface interlocked with the rotating shaft to form a radial seal, and its end face is pressed against the end cover of the motor to form an end face seal. The connecting part passes through the first connecting hole and forms an axial interference fit with the inner wall of the first connecting hole; The second abutting part is set at an angle to the connecting part, and its end face forms a beveled press seal with the front shell assembly.

4. The waterproof fan according to claim 3, characterized in that, The diameter of the first abutting portion is greater than the diameter of the first connecting hole, the diameter of the connecting portion is greater than or equal to the diameter of the first connecting hole, and the diameter of the first abutting portion is greater than the diameter of the connecting portion.

5. The waterproof fan according to claim 3, characterized in that, The connecting part has an arc-shaped structure that is recessed towards the rotating shaft on the side opposite to the rotating shaft.

6. The waterproof fan according to claim 2, characterized in that, The motor assembly includes: A motor bracket is disposed within the receiving cavity; the motor bracket has the support shaft on the side opposite to the synchronous motor, and the motor bracket has a third connecting hole; A synchronous motor, wherein the shaft of the synchronous motor passes through the third connecting hole, and the shaft is connected to the oscillating transmission component via a crank; The third sealing ring is sleeved on the outer periphery of the shaft of the synchronous motor and embedded in the inner wall of the third connecting hole, and abuts against the motor bracket and the shaft to seal the third connecting hole.

7. The waterproof fan according to claim 6, characterized in that, The front housing assembly has a first mounting groove on the side facing the motor bracket, and the rear housing assembly has a first protrusion coaxially arranged with the first mounting groove on the side facing the motor bracket; the motor bracket has a first flange and a second groove on its axial sides respectively. The engagement of the first flange with the first mounting groove and the engagement of the first protrusion with the second groove form a bidirectional axial limit on the motor bracket.

8. The waterproof fan according to claim 7, characterized in that, It also includes a fourth sealing ring, which comprises an integrally formed first sub-sealing ring and a second sub-sealing ring; the first sub-sealing ring is disposed between the first flange and the first mounting groove to seal the mating gap of the first mounting groove; the second sub-sealing ring is disposed between the first protrusion and the second groove to seal the mating gap of the second groove.

9. The waterproof fan according to claim 2, characterized in that, The front shell assembly is further provided with a first sealing groove, and the second sealing ring is embedded in the first sealing groove and abuts against the front shell assembly and the rear shell assembly to seal the gap between the front shell assembly and the rear shell assembly.

10. The waterproof fan according to claim 6, characterized in that, It also includes a PCB board, which is disposed in the receiving cavity and electrically connected to the motor, the synchronous motor and the oscillating transmission component respectively.

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