Waterproof structure of fan motor and fan

Abstract

The utility model relates to a waterproof structure of a fan motor and a fan, and the waterproof structure comprises a waterproof housing which is used for covering a fan motor body, the waterproof housing is provided with a circular hole for a fan motor shaft to pass through, and the periphery of the circular hole is provided with a projection structure; the tail end of the protruding structure bends and extends in the direction away from the motor shaft. The waterproof structure of the fan motor has a flow guide function, even if water flow or water drops enter the waterproof shell through gaps, under the gravity of the water flow or the water drops and the guide function of the waterproof structure, the water flow flows from the highest point to the lowest point along the circular periphery, and the water flow or the water drops can flow into the waterproof shell. Therefore, water entering the waterproof housing is timely discharged and prevented from entering the motor.

Description

Technical Field

[0001] The utility model relates to the field of fan structures, in particular to a waterproof structure of a fan motor and a fan. Background Art

[0002] Fans, as convenient and inexpensive cooling appliances, are widely used in daily life and industrial production. As their applications expand, so too do the performance requirements. In water-rich or rain-prone outdoor environments, such as camping or by the pool, fans have a high demand for waterproofing. In these applications, water can easily enter the fan, affecting its proper function. Therefore, a waterproof structure is required to protect the fan's motor from moisture, ensuring proper operation and preventing damage that could lead to safety issues.

[0003] Currently, fan motors consist of a motor body and a motor shaft extending from the motor body. Existing fan waterproof structures employ a waterproof housing mounted outside the motor body, encasing the motor body and leaving the motor shaft exposed. When water splashes or drips onto the fan, the waterproof housing blocks the flow or droplets.

[0004] However, because the motor shaft rotates continuously during operation, existing waterproof structures are difficult to securely enclose the motor shaft. The motor shaft is exposed to the outside world, allowing some water or water droplets to enter the motor through the gap between the motor shaft and the waterproof housing, potentially causing the fan to malfunction or damage the motor, posing a safety risk to the user. Utility Model Content

[0005] Based on this, the purpose of the present invention is to overcome the defects or shortcomings of the prior art and provide a waterproof structure for a fan motor.

[0006] The waterproof structure of the fan motor includes a waterproof shell for covering the fan motor body. The waterproof shell is provided with a circular hole for the fan motor shaft to pass through, and a protruding structure is provided on the periphery of the circular hole; the end of the protruding structure turns and extends in a direction away from the motor shaft.

[0007] The waterproof structure of the fan motor described in the present invention has a diversion effect. Even if water flow or water droplets enter the waterproof housing through the gap, under the gravity of the water flow or water droplets and the guiding effect of the waterproof structure of the present application, the water flow flows from the highest point to the lowest point along the circular outer circumference, so that the water entering the waterproof housing is discharged in time to avoid entering the interior of the motor.

[0008] Furthermore, it also includes a fan blade seat, which includes a side wall and an end face, the side wall and the end face form a cavity structure with one end open, and the side wall includes an inner side wall and an outer side wall that are spaced apart.

[0009] Furthermore, the waterproof housing includes a pair of front shell and rear shell that are arranged in a coordinated manner. The front shell and the rear shell are both hollow columnar structures with one end open, and flanges are respectively formed by protruding outwards from the open end.

[0010] Furthermore, it also includes a waterproof cover, which is arranged outside the raised structure, and the outer circumference of the waterproof cover extends in a direction away from the motor shaft to form a drainage portion; the waterproof cover is tightly mounted on the motor shaft through a fixing portion and rotates coaxially with the motor shaft.

[0011] Furthermore, the waterproof cover also includes a connecting portion connected to the drainage portion and the fixing portion respectively; the connecting portion includes a parallel surface parallel to the end surface of the motor body, a vertical surface perpendicular to the end surface of the motor body, and a bent surface connecting the parallel surface and the vertical surface, and the angle between the bent surface and the parallel surface and the angle between the bent surface and the vertical surface are both greater than 90 degrees.

[0012] Furthermore, a reinforcement portion is provided between the parallel surface and the fixing portion, the reinforcement portion is located on the inner side of the waterproof cover, and a surface of the reinforcement portion facing the inner side of the waterproof cover is inclined relative to the fixing portion.

[0013] Furthermore, the diameter of the outer side wall is smaller than the diameter of the flange.

[0014] Furthermore, a sealing ring is included, and the sealing ring is arranged between the corresponding flanges of the front shell and the rear shell.

[0015] Furthermore, a fan is provided, comprising a motor and the fan motor waterproof structure mounted on the motor.

[0016] Furthermore, the diameter of the outer side wall of the fan blade seat is larger than the diameter of the motor.

[0017] In order to better understand and implement the present invention, the present invention is described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A perspective view of an embodiment of the present utility model;

[0019] Figure 2 This is a front view of an embodiment of the utility model;

[0020] Figure 3 It is a cross-sectional view of the embodiment of the utility model along the AA direction;

[0021] Figure 4 A partially enlarged view of an embodiment of the present invention (B)

[0022] Figure 5 It is a partial enlarged view (C) of an embodiment of the present utility model.

[0023] Description of the drawings: motor body 1, motor shaft 2, blades 3, waterproof shell 10, front shell 11, rear shell 12, flanges 13a, 13b, raised structure 14, extension part 141, guide part 142, sealing ring 15, blade seat 20, inner side wall 21a, outer side wall 21b, end face 22, waterproof cover 30, fixing part 31, connecting part 32, parallel surface 321, vertical surface 322, bending surface 323, drainage part 33, reinforcement part 34. DETAILED DESCRIPTION

[0024] The present invention will be described in detail below with reference to the accompanying drawings and embodiments.

[0025] See also Figures 1 to 5 The fan motor waterproof structure of this embodiment is installed on the motor, and the motor includes a motor body 1 and a motor shaft 2 extending from the motor body 1.

[0026] The fan motor waterproof structure includes a waterproof housing 10, a blade holder 20, and a waterproof cover 30. The waterproof housing 10 is a hollow cylindrical structure that fits over the motor body 1 and is mounted outside the motor body 1. The motor shaft 2 extends from the end of the waterproof housing 10 and is fixedly connected to the blade holder 20. The waterproof cover 30 is mounted on the motor shaft 2 and is located between the waterproof housing 10 and the blade holder 20.

[0027] Specifically, the waterproof housing 10 includes a pair of mating front and rear shells 11, 12. Each of the front and rear shells 11, 12 is a hollow cylindrical structure with one end open. Flanges 13a and 13b extend outward from the open ends, respectively. The flanges 13a and 13b are positioned opposite each other and fixedly connected, forming a hollow cylindrical structure that mates with the motor body 1. Specifically, the flanges 13a and 13b are provided with a plurality of screw holes for screw connection.

[0028] The front housing 11 is provided with a circular hole through which the motor shaft 2 passes. A raised structure 14 is positioned around the periphery of the circular hole. The raised structure 14 comprises an extension 141 and a guide 142. The extension 141 is parallel to the motor shaft 2 and extends toward the protrusion of the front housing 11. The guide 142 is connected to the extension 141 and extends away from the motor shaft 2 to form the guide 142. A gap is left between the extension 141 and the motor shaft 2 to prevent the motor shaft 2 from colliding with the extension 141 when rotating or vibrating, causing noise or damage.

[0029] As a further optimization, a sealing ring 15 is further provided between the flanges 13a and 13b. The sealing ring 15 is preferably a waterproof rubber ring with a certain elasticity, which can block the gap between the front shell 11 and the rear shell 12 to prevent water flow or water droplets from entering the motor through the gap.

[0030] The fan seat 20 includes a side wall and an end face 22, and the side wall and the end face 22 form a cavity structure with an open end, and the cavity structure is cylindrical. Specifically, the side wall includes an inner side wall 21a and an outer side wall 21b that are spaced apart. A gap is provided between the end of the inner side wall 21a at the opening and the end face of the waterproof shell 10. The diameter of the outer side wall 21b is larger than the diameter of the motor body 1 and smaller than the diameter of the flange 13a. A seat core is provided at the center position of the end of the cavity structure, and the motor shaft 2 is plugged into the fan seat 20 through the seat core. During installation, the blades 3 of several fans are connected to the outer periphery of the fan seat 20. Preferably, the fan seat 20 and the blades 3 are integrally formed.

[0031] The waterproof cover 30 is sleeved on the motor shaft 2, and the cover is arranged outside the raised structure 14. When the motor shaft 2 rotates, the waterproof cover 20 rotates coaxially with the motor shaft 2. Specifically, the waterproof cover 30 includes a fixing portion 31, a connecting portion 32 and a drainage portion 33 connected in sequence. The portion where the waterproof cover 30 is fixedly engaged with the motor shaft 2 is the fixing portion 31, and the fixing portion 31 and the motor shaft 2 are tightly sleeved on the motor shaft 2. The outer circumference of the waterproof cover 30 extends in a direction away from the motor shaft to form a drainage portion 33, and the drainage portion 33 is arranged opposite to the guide portion 142. The two ends of the connecting portion 32 are respectively connected to the fixing portion 31 and the drainage portion 33. Preferably, the fixing portion 31, the connecting portion 32 and the drainage portion 33 are integrally formed.

[0032] In this embodiment, please refer to Figure 4The connecting portion 32 includes a parallel surface 321, a vertical surface 322, and a bent surface 323. The parallel surface 321 is connected to the fixing portion 31 and is parallel to the end face of the motor body 1; the vertical surface 322 is connected to the drainage portion 33 and is perpendicular to the end face of the motor body 1; the bent surface 323 connects the parallel surface 321 and the vertical surface 322. Preferably, the angle between the bent surface 323 and the parallel surface 321 and the angle between the bent surface 323 and the vertical surface 322 are both greater than 90 degrees. The bent surface 323 helps to strengthen the strength of the waterproof cover 30 and extend the life of the waterproof cover 30. Furthermore, a reinforcing portion 34 is provided between the parallel surface 321 and the fixing portion 31. The reinforcing portion 34 is located on the inner side of the waterproof cover 30, and the surface of the reinforcing portion 34 facing the inner side of the waterproof cover 30 is inclined relative to the parallel surface 321 and the fixing portion 31. The reinforcement portion 34 further strengthens the waterproof cover 30 and extends its lifespan. It should be noted that the curved surface 323 and the reinforcement portion 34 are not required. For example, in some scenarios where the fan operates at a lower intensity, even without the curved surface 323 or the reinforcement portion 34, the resulting waterproof cover can be adequately formed by directly connecting the parallel surface 321 and the vertical surface 322. This can also simplify the structure of the waterproof cover 30 and reduce manufacturing costs. Furthermore, there is no restriction on the angle between the parallel surface 321 and the vertical surface 322.

[0033] The working principle of the waterproof structure of the fan motor of this embodiment is as follows: first, the waterproof shell 10 and the fan blade seat 20 block most of the water flow or water droplets; further, since the diameter of the outer side wall 21b of the fan blade seat 20 is larger than the diameter of the motor body 1, that is, the gap between the waterproof shell 10 and the motor shaft 2 is located inside the fan blade seat 20, the fan blade seat 20 can block most of the water outside and prevent water flow or water droplets from entering the gap between the waterproof shell 10 and the motor shaft 2; further, even if water enters the fan blade seat 20, due to the inner side wall 21a of the fan blade seat 20 and the outer side wall 2 1b, and the fan blade seat 20 is cylindrical. Therefore, after the water flows into the fan blade seat 20, it will first enter the gap between the inner side wall 21a and the outer side wall 21b, and then flow from the highest point to the lowest point along the outer circumference of the cylinder under the action of gravity, and then flow out of the fan from the opening of the fan blade seat 20; in addition, since the diameter of the outer side wall 21b is smaller than the diameter of the flange 13a, the flange 13a can also block the water droplets splashing or pouring towards the opening of the fan blade seat 20 to a certain extent, preventing the water droplets from entering the interior of the fan blade seat 20 from the opening of the fan blade seat 20. Furthermore, even if water enters the fan housing 20 along the waterproof housing 10, the waterproof housing 10 includes a raised structure 14, and since the extension 141 of the raised structure 14 is also cylindrical, the guide portion 142 provides a guiding function. Therefore, under the guidance of gravity and the extension 141 and guide portion 142, the water flows along the cylindrical outer circumference from the highest point to the lowest point. Furthermore, the water falls to the bottom of the waterproof cover 30 and is discharged along the drainage portion 33. A gap is provided between the end of the inner side wall 21a at the opening and the end face of the waterproof housing 10, and a gap is provided between the end of the outer side wall 21b at the opening and the waterproof housing 10, allowing the water to be discharged to the outside of the fan through the gap. Furthermore, since the waterproof cover 30 can rotate coaxially with the motor shaft 2, water adhering to the waterproof cover 30 can also be discharged under the action of centrifugation.

[0034] Compared to the prior art, the waterproof structure of the fan motor described in this utility model has a diversion effect. Even if water flows or water droplets enter the waterproof housing through the gap, the water flow or water droplets, combined with the guidance of the waterproof structure, flows along the circular periphery from the highest point to the lowest point, thereby promptly draining the water that enters the waterproof housing and preventing it from entering the motor interior. Furthermore, the provision of the waterproof housing, the fan blade seat, and the waterproof cover, and the clever coordination of these components, achieve multi-faceted waterproofing.

[0035] The above-described embodiments merely represent several implementation methods of the present invention. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent. It should be noted that a person skilled in the art would be able to make numerous modifications and improvements without departing from the concept of the present invention, and the present invention is intended to encompass such modifications and variations.

Claims

1. A waterproof structure for a fan motor, characterized by: Includes waterproof housing and case; The waterproof outer shell is arranged outside the fan motor body, and is provided with a circular hole for the fan motor shaft to pass through, and a protrusion structure is provided on the periphery of the circular hole; the end of the protrusion structure turns and extends in a direction away from the motor shaft; The waterproof cover is arranged outside the protruding structure, and the outer circumference of the waterproof cover extends in a direction away from the motor shaft to form a drainage portion; the waterproof cover is tightly sleeved on the motor shaft through a fixing portion and rotates coaxially with the motor shaft.

2. The waterproof structure of the fan motor according to claim 1, characterized in that: It also includes a fan blade seat, which includes a side wall and an end face. The side wall and the end face form a cavity structure with one end open. The side wall includes an inner side wall and an outer side wall that are spaced apart.

3. The waterproof structure of the fan motor according to claim 2, characterized in that: The waterproof housing includes a pair of front shell and rear shell that are matched with each other. Both the front shell and the rear shell are hollow columnar structures with one end open, and flanges are formed by protruding outwards from the open end.

4. The waterproof structure of the fan motor according to claim 3, characterized in that: The waterproof cover also includes a connecting portion connected to the drainage portion and the fixing portion respectively; the connecting portion includes a parallel surface parallel to the end surface of the motor body, a vertical surface perpendicular to the end surface of the motor body, and a bent surface connecting the parallel surface and the vertical surface, and the angle between the bent surface and the parallel surface and the angle between the bent surface and the vertical surface are both greater than 90 degrees.

5. The waterproof structure of the fan motor according to claim 4, characterized in that: A reinforcement portion is provided between the parallel surface and the fixing portion. The reinforcement portion is located on the inner side of the waterproof cover. A surface of the reinforcement portion facing the inner side of the waterproof cover is inclined relative to the fixing portion.

6. The waterproof structure of the fan motor according to claim 5, characterized in that: It also includes a wind blade seat, which includes side walls and end faces, and the side walls of the wind blade seat include inner side walls and outer side walls that are spaced apart; the waterproof shell includes a pair of front shells and rear shells that are matched together, and the front shells and rear shells are both hollow cylindrical structures with one end open, and protrude outward from their open ends to form flanges; the diameter of the outer side walls is smaller than the diameter of the flanges.

7. The waterproof structure of the fan motor according to claim 6, characterized in that: It also includes a sealing ring, which is arranged between the corresponding flanges of the front shell and the rear shell.

8. A fan, characterized in that: The invention comprises a motor and a waterproof structure for a fan motor according to any one of claims 1 to 7 mounted on the motor.

9. The fan according to claim 8, wherein: It also includes a fan blade seat, which includes a side wall and an end face. The side wall and the end face form a cavity structure with an open end. The side wall of the fan blade seat includes an inner side wall and an outer side wall that are spaced apart. The diameter of the outer side wall of the fan blade seat is larger than the diameter of the motor.

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