Fan assembly of portable fan and portable fan

Abstract

The utility model provides a fan assembly of a portable fan and the portable fan, and relates to the technical field of fans. The fan assembly comprises a hub, a motor and a fan blade assembly, and the hub is provided with a containing part; the motor is installed in the containing part and comprises a bearing and a rotating shaft arranged in the bearing in a penetrating mode, a wedge-shaped gap for generating oil film dynamic pressure in the rotating process is formed between the bearing and the rotating shaft, and one end of the rotating shaft is fixedly connected with the hub; the fan blade assembly is arranged in the circumferential direction of the hub. The portable fan comprises the fan assembly provided by the utility model. Due to the design, the rotating shaft is separated from the bearing during high-speed rotation, direct contact between the rotating shaft and the bearing is avoided, the friction coefficient between the rotating shaft and the bearing is reduced, noise is reduced, and good operation stability is provided. In addition, due to the design, abrasion to the bearing and the rotating shaft is reduced, and the service life of the bearing and the rotating shaft is further prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of fans, in particular to a fan assembly of a portable fan and the portable fan. Background Art

[0002] Portable fans commonly seen in daily life, such as neck fans, are generally designed to be hung around the user's neck for use. This design makes the fan hand-free, thus freeing the user's hands and is very convenient. However, portable fans are usually close to the user, and the requirements for noise reduction performance are relatively high. In portable fans, when the motor runs at high speed, friction between the bearing and the shaft will occur, thereby generating noise, which has a negative impact on the user's experience. In addition, when the motor runs at high speed for a long time, it will cause wear on the bearing and shaft, which will affect the working stability and life of the portable fan. Utility Model Content

[0003] The utility model aims to provide a fan assembly of a portable fan with low noise and higher working stability, and a portable fan comprising the fan assembly of the portable fan.

[0004] In order to achieve the above object, the technical solution of the utility model is as follows:

[0005] A fan assembly of a portable fan, comprising:

[0006] A wheel hub having a receiving portion;

[0007] A motor is installed in the accommodation portion and includes a bearing and a rotating shaft passing through the bearing, a wedge-shaped gap is provided between the bearing and the rotating shaft to generate oil film dynamic pressure during rotation, and one end of the rotating shaft is fixedly connected to the wheel hub;

[0008] The fan blade assembly is arranged in the circumference of the hub.

[0009] Further, the bearing comprises a bearing seat and a bearing bush installed in the bearing seat;

[0010] An oil wedge portion is provided on the circumference of the inner surface of the bearing bush and / or the circumference of the outer surface of the rotating shaft.

[0011] Further, the oil wedge portion includes a plurality of cut surfaces arranged along the circumferential direction of the inner surface of the bearing bush, or the oil wedge portion includes a dynamic pressure groove arranged along the circumferential direction of the inner surface of the bearing bush.

[0012] Furthermore, the hub includes a main body and a support portion extending outward from the main body, the accommodating portion is formed in the main body, and the fan blade assembly includes a plurality of blades disposed on the support portion and arranged at intervals along the circumference of the support portion, and the blades are metal blades.

[0013] Furthermore, the fan blade assembly further comprises a connecting member provided at one end of the blade away from the supporting portion;

[0014] One end of each of the blades is plug-connected to the support portion, and the other end of each of the blades is plug-connected to the connector.

[0015] Furthermore, a plurality of plug-in parts are respectively provided on the supporting part and the connecting member, and plug-in parts which cooperate and connect with the plug-in parts are provided at corresponding bends at both ends of the blade.

[0016] Further, each of the blades includes a first portion and a second portion having a larger width than that of the first portion;

[0017] One end of each blade is plug-connected with the support portion, the second part of each blade is plug-connected with the body at a side close to the body, and the first part and the second part are flush with each other at a side away from the body.

[0018] Furthermore, the fan blade assembly further comprises a connecting member provided at one end of the blade away from the supporting portion;

[0019] One end of each of the blades is connected to the support portion via a first curling structure, and the other end of each of the blades is connected to the connecting member via a second curling structure.

[0020] Furthermore, the first curling structure includes a first clamping portion formed by curling the edge of the support portion and a first clamping ring provided at the bottom end of the outer side of the blade, and the first clamping ring is cooperatively connected with the first clamping portion;

[0021] The second curling structure includes a second clamping portion formed by curling the edge of the connecting member and a second clamping ring arranged at the top end of the outer side of the blade, and the second clamping ring is cooperatively connected with the second clamping portion.

[0022] On the other hand, the utility model further provides a portable fan, comprising a housing and a fan assembly of the portable fan as described in any one of the above embodiments installed in the housing.

[0023] Compared with the prior art, the fan assembly of the portable fan and the portable fan provided by the embodiment of the utility model have at least the following technical effects:

[0024] The wheel hub is provided with a receiving portion, and the motor is installed in the receiving portion. The motor includes a bearing and a rotating shaft passing through the bearing. A wedge-shaped gap is provided between the bearing and the rotating shaft to generate oil film dynamic pressure during rotation. One end of the rotating shaft is fixedly connected to the wheel hub, and the fan blade assembly is arranged in the circumference of the wheel hub. This design allows the rotating shaft to be separated from the bearing when rotating at high speed, avoiding direct contact between the rotating shaft and the bearing, thereby reducing the friction coefficient between the rotating shaft and the bearing, not only reducing the generation of noise, but also providing better operating stability. In addition, this design reduces the wear on the bearing and the rotating shaft, thereby extending their service life.

[0025] The portable fan includes the fan assembly of the portable fan mentioned above, and therefore at least has the technical effects corresponding to the portable fan assembly embodiment, which will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a schematic diagram of the overall structure of a fan assembly in one embodiment;

[0027] Figure 2 for Figure 1 Schematic diagram of the explosion structure;

[0028] Figure 3 for Figure 1 Another schematic diagram of the explosion structure;

[0029] Figure 4 is a schematic diagram of the structure of a bearing bush in one embodiment;

[0030] Figure 5 A schematic diagram of the structure of a bearing bush in another embodiment;

[0031] Figure 6 A schematic diagram of the structure of a bearing bush in another embodiment;

[0032] Figure 7 is a schematic diagram of the overall structure of a fan assembly in another embodiment;

[0033] Figure 8 for Figure 7 Schematic diagram of the explosion structure;

[0034] Fig. 9 is a schematic diagram of the overall structure of a fan assembly in another embodiment;

[0035] Fig.10 for Fig. 9 Schematic diagram of the explosion structure;

[0036] Fig.11 for Fig. 9 Schematic diagram of the cross-section structure after hiding some of the motor structures;

[0037] Fig.12The figure is a schematic diagram of the overall structure of a portable fan after a portion of the shell is hidden in one embodiment.

[0038] Description of Figure Numbers:

[0039] 10. Fan assembly; 11. Hub; 111. Accommodation portion; 112. Body; 113. Support portion; 12. Motor; 121. Bearing; 1211. Bearing seat; 1212. Bearing shell; 122. Rotating shaft; 123. Oil wedge portion; 1231. Section; 1232. Dynamic pressure groove; 124. Oil storage tank; 13. Fan blade assembly; 131. Blade; 1311. First part; 1312. Second part; 132. Connector; 14. Plug-in portion; 15. Plug-in portion; 16. First curling structure; 161. First clamping portion; 162. First clamping ring; 17. Second curling structure; 171. Second clamping portion; 172. Second clamping ring; 20. Housing; 21. Air outlet. DETAILED DESCRIPTION

[0040] The technical solution of the utility model is further elaborated in detail below in conjunction with the drawings and specific embodiments of the specification. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by technicians in the technical field of the utility model. The terms used herein in the specification of the utility model are only for the purpose of describing specific embodiments and are not intended to limit the utility model. In the following description, the expression "some embodiments" is involved, which describes a subset of all possible embodiments, but it should be understood that "some embodiments" can be the same subset or different subsets of all possible embodiments, and can be combined with each other without conflict.

[0041] It should also be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "inside", "outside", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0042] Please refer to the attached Figure 1 To Attachment Figure 3, an embodiment of the utility model provides a fan assembly of a portable fan, the fan assembly 10 includes a hub 11, a motor 12 and a blade assembly 13, wherein the hub 11 is provided with a housing portion 111; the motor 12 is installed in the housing portion 111, and includes a bearing 121 and a rotating shaft 122 inserted in the bearing 121, a wedge-shaped gap for generating oil film dynamic pressure during rotation is provided between the bearing 121 and the rotating shaft 122, and one end of the rotating shaft 122 is fixedly connected to the hub 11; the blade assembly 13 is provided in the circumference of the hub 11. It can be explained that a wedge-shaped gap for generating oil film dynamic pressure during rotation is provided between the bearing 121 and the rotating shaft 122, and through the formation of the wedge-shaped gap, when the rotating shaft 122 rotates in the bearing 121, the lubricant (usually oil) is sucked between the outer surface of the rotating shaft 122 and the inner surface of the bearing 121, and as the speed of the rotating shaft 122 increases, the lubricant generates a dynamic pressure effect in this narrow gap due to viscosity and inertia. Specifically, during the rotation of the shaft 122, the lubricant flows between the shaft 122 and the bearing 121 to form a gradually narrowing wedge-shaped area, namely, an oil wedge. This wedge-shaped area causes the pressure of the lubricant in the area to gradually increase, forming a stable oil film dynamic pressure. The oil film dynamic pressure can completely separate the shaft 122 from the inner surface of the bearing 121, thereby avoiding direct contact between the two. This not only significantly reduces the friction coefficient between the shaft 122 and the bearing 121, thereby reducing the generation of noise and providing better operating stability, but also reduces the wear on the bearing 121 and the shaft 122, thereby extending the service life of the bearing 121 and the shaft 122. It is worth mentioning that the motor 12 can use a three-phase motor, which can not only achieve precise control of the movement of the fan blade assembly 13, but also increase the speed while minimizing power consumption.

[0043] In this embodiment, the wheel hub 11 is provided with a housing portion 111, and the motor 12 is installed in the housing portion 111. The motor 12 includes a bearing 121 and a rotating shaft 122 that passes through the bearing 121. A wedge-shaped gap that generates oil film dynamic pressure during rotation is provided between the bearing 121 and the rotating shaft 122. One end of the rotating shaft 122 is fixedly connected to the wheel hub 11, and the fan blade assembly 13 is arranged in the circumference of the wheel hub 11. This design allows the rotating shaft 122 to separate from the bearing 121 when rotating at high speed, avoiding direct contact between the rotating shaft 122 and the bearing 121, thereby reducing the friction coefficient between the rotating shaft 122 and the bearing 121, not only reducing the generation of noise, but also providing better operating stability. In addition, this design reduces the wear on the bearing 121 and the rotating shaft 122, thereby extending their service life.

[0044] Please refer to the attached Figure 4 To Attachment Figure 6In some optional embodiments, the bearing 121 includes a bearing seat 1211 and a bearing shell 1212 installed in the bearing seat 1211; an oil wedge portion 123 is provided on the circumference of the inner surface of the bearing shell 1212 and / or the circumference of the outer surface of the rotating shaft 122, so as to generate a dynamic pressure effect during operation. It can be explained that the oil wedge portion 123 is provided on the circumference of the inner surface of the bearing shell 1212 and / or the circumference of the outer surface of the rotating shaft 122 means that the oil wedge portion 123 can be provided not only on the circumference of the inner surface of the bearing shell 1212, but also on the circumference of the outer surface of the rotating shaft 122, or simultaneously on the circumference of the outer surface of the rotating shaft 122 and the circumference of the inner surface of the bearing shell 1212. It is further explained that an oil storage tank 124 is provided on the outer surface of the bearing shell 1212, and the oil storage tank 124 is used to store lubricant to ensure that the lubricant can be replenished into the oil wedge portion 123 in time when needed. The bearing bush 1212 is a columnar body, and is provided with a shaft hole for inserting the rotating shaft 122. There is a wedge-shaped gap between the bearing 121 and the shaft hole. When the rotating shaft 122 rotates, the lubricant forms an oil film dynamic pressure in the wedge-shaped gap under the action of viscosity and inertia. Specifically, an oil wedge portion 123 is provided in the circumferential direction of the shaft hole wall. The lubricant flows in the oil wedge portion 123 during the rotation of the rotating shaft 122, forming a stable oil film dynamic pressure, thereby separating the rotating shaft 122 from the inner surface of the bearing bush 1212, so that the rotating shaft 122 is covered with an oil film, and the two are in a completely liquid friction state, thereby achieving a quiet and low-wear effect under high-speed movement.

[0045] In some optional embodiments, the oil wedge portion 123 includes a plurality of cut surfaces 1231 arranged along the circumference of the inner surface of the bearing shell 1212. Through the arrangement of the plurality of cut surfaces 1231, a plurality of oil wedge gaps are formed between the rotating shaft 122 and the bearing shell 1212. The plurality of oil wedge gaps can share the load of the rotating shaft 122, provide a more uniform support force, and enable the rotating shaft 122 to maintain a higher rotation accuracy when rotating at high speed, thereby avoiding the axis deviation. In a specific example, the shaft hole is formed by a plurality of arc surfaces arranged in the radial direction, and the connection between adjacent arcs can form a step or an angle.

[0046] In some optional embodiments, the oil wedge portion 123 includes a dynamic pressure groove 1232 arranged along the circumference of the inner surface of the bearing 1212. Specifically, the dynamic pressure groove 1232 is arranged on the inner wall of the bearing 1212 in a concave form, and its form is diverse, and can be designed into a variety of shapes according to actual needs, such as a herringbone or an eight-shaped shape, and the outer surface of the rotating shaft 122 maintains a flat surface without lines. In addition, the shape of the gullies of the dynamic pressure groove 1232 is also different. The width of the gully can be equal or gradual, and its cross-section can be rectangular, arc-shaped, and other forms. The specific structure of the dynamic pressure groove 1232 will be adjusted according to different application scenarios and actual needs to ensure that when the fan assembly 10 is in operation, the rotating shaft 122 and the bearing 1212 can form an oil wedge and generate oil film dynamic pressure more efficiently and reliably to achieve stable complete liquid friction, thereby improving the overall performance of the fan assembly 10, making it quieter and longer in service life during operation. It should be further explained that the dynamic pressure groove 1232 can also be set in the form of a protrusion on the outer surface of the rotating shaft 122, while the inner wall of the bearing shell 1212 remains a smooth surface without lines. This design can also generate a dynamic pressure effect when the lubricant flows.

[0047] In some optional embodiments, the hub 11 includes a body 112 and a support portion 113 extending outward from the body 112, the receiving portion 111 is formed in the body 112, and the fan blade assembly 13 includes a plurality of blades 131 arranged on the supporting portion 113 and arranged at intervals along the circumference of the supporting portion 113, and the blades 131 are metal blades. It should be further explained that the body 112 includes an end portion and a side portion connected to each other, and the end portion and the side portion are surrounded to form a receiving portion 111 with an opening, and the opening of the receiving portion 111 is located in a setting opposite to the end portion, and a through hole is provided on the end portion, and the outer end of the rotating shaft 122 passes through the through hole and is fixedly connected thereto. It should be further explained that a clamping groove is provided on the outer wall of the rotating shaft 122 at one end outside the bearing 121, and the clamping groove is clamped with the inner edge of the through hole, so as to realize the fixed connection between the rotating shaft 122 and the hub 11. The outer wall of the rotating shaft 122 at one end outside the bearing 121 and the through hole can also be fixedly connected by riveting. One end of the side of the body 112 away from the end portion extends radially outwardly from the body 112 to form a support portion 113, and a plurality of blades 131 are arranged at intervals in the circumferential direction of the support portion 113. It is worth mentioning that the blades 131 are metal blades made of metal materials, which can achieve a weight reduction effect through a thinning design. Compared with plastic blades, metal blades can continue to be thinned after reaching a certain thickness, thereby further reducing weight. This design not only increases wind speed, but also effectively reduces power consumption.

[0048] Please refer again to the attached Figure 3In some optional embodiments, the fan blade assembly 13 also includes a connector 132 disposed at one end of the blade 131 away from the support portion 113; one end of each blade 131 is plug-connected to the support portion 113, and the other end of each blade 131 is plug-connected to the connector 132, so that the blade 131 is stably and reliably connected. Specifically, a plurality of plug-in portions 14 are respectively disposed on the support portion 113 and the connector 132, and the plurality of plug-in portions 14 are evenly distributed. The two ends of the blade 131 are correspondingly bent and provided with plug-in portions 15 that are matched and connected with the plug-in portions 14, wherein the plug-in portions 15 are precisely designed and can be closely matched with the plug-in portions 14. The blade 131 is firmly fixed between the support portion 113 and the connector 132 by plugging the plug-in portions 14 and the plug-in portions 15, thereby ensuring the stability of the blade 131 at high speeds, effectively preventing the blade 131 from loosening or falling off, and improving the safety of the fan assembly 10.

[0049] Please refer to the attached Figure 7 and attached Figure 8 In some optional embodiments, each blade 131 includes a first portion 1311 and a second portion 1312 having a larger width than the first portion 1311; one end of each blade 131 is plug-connected with the support portion 113, and the second portion 1312 of each blade 131 is plug-connected with the body 112 at a side close to the body 112. The first portion 1311 and the second portion 1312 are integrally formed structures, and the first portion 1311 and the second portion 1312 are flush with each other at a side away from the body 112. It can be explained that the width of the first portion 1311 and the width of the second portion 1312 refer to the width of the blade 131 along the radial direction of the body 112. In a specific example, the second part 1312 is plug-connected with the support part 113 at one end close to the support part 113, and is plug-connected with the side of the main body 112 at one end close to the side of the main body 112. The first part 1311 is located on the side of the second part 1312 away from the main body 112, and extends beyond the end of the main body 112 in a direction away from the support part 113. In this structure, not only can an air inlet channel be formed between adjacent blades 131, but an additional air inlet channel can also be formed between the first part 1311 and the main body 112. This ensures the stability of the blades 131 while increasing the air volume of the fan assembly 10.

[0050] Please refer to the attached Fig. 9 To Attachment Fig.11 In some optional embodiments, the fan blade assembly 13 also includes a connecting member 132 disposed at one end of the blade 131 away from the support portion 113; one end of each blade 131 is connected to the support portion 113 via a first curling structure 16, and the other end of each blade 131 is connected to the connecting member 132 via a second curling structure 17.

[0051] In some specific embodiments, the first curling structure 16 includes a first clamping portion 161 formed by the edge of the support portion 113 being rolled up, and a first clamping ring 162 provided at the bottom end of the outer side of the blade 131, and the first clamping ring 162 is matched and connected with the first clamping portion 161. The first clamping portion 161 is provided at the periphery of the support portion 113, and the first clamping portion 161 is rolled up in a direction close to the connecting member 132 after the edge of the support portion 113 extends radially outward to form an annular clamping groove, and the bottom ends of the plurality of blades 131 on the side away from the bearing 121 are all connected to the inner side of the first clamping ring 162, and the annular clamping groove of the first clamping portion 161 is for the outer side of the first clamping ring 162 to be clamped in.

[0052] The second curling structure 17 includes a second clamping portion 171 formed by the edge of the connecting member 132 being rolled up, and a second clamping ring 172 provided at the outer top of the blade 131, and the second clamping ring 172 is matched and connected with the second clamping portion 171. The second clamping portion 171 is provided at the periphery of the connecting member 132, and the second clamping portion 171 is rolled up in the direction close to the support portion 113 after the edge of the connecting member 132 extends radially outward to form an annular clamping groove, and the tops of the multiple blades 131 away from the bearing 121 are all connected to the inner side of the second clamping ring 172, and the annular clamping groove of the second clamping portion 171 is for the outer side of the second clamping ring 172 to be clamped in. The first clamping ring 162 and the first clamping portion 161, and the second clamping ring 172 and the second clamping portion 171 are precisely matched, so that the blade 131 is firmly connected to the support portion 113 and the connecting member 132.

[0053] On the other hand, please see the attached Fig.12 , an embodiment of the utility model also provides a portable fan, which can be a neck hanging fan, a waist hanging fan, a head mounted fan, a handheld fan, etc. The following takes the portable fan as an example of a neck hanging fan, which includes a shell 20 and a fan assembly of the portable fan in the above embodiment installed in the shell 20. The shell 20 is also provided with an air outlet 21, and the air outlet 21 can, for example, blow the wind blown out of the fan assembly to the cheeks of the user. In addition, a semiconductor refrigeration component is provided in the neck hanging fan, and its cold end is in heat conduction contact with the user through a heat conducting component to cool the user, and its hot end can be blown and dissipated by the above fan assembly 10. Of course, this is only an example, and the present embodiment is not limited to this. The portable fan provided in this embodiment includes the fan assembly of the above portable fan, and therefore has the technical effects corresponding to the portable fan assembly embodiment, which will not be repeated here.

[0054] The above are only specific implementations of the utility model, but the protection scope of the utility model is not limited to them. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the utility model, which should be included in the protection scope of the utility model. The protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A fan assembly of a portable fan, characterized in that: include: A wheel hub having a receiving portion; A motor is installed in the accommodation portion and includes a bearing and a rotating shaft passing through the bearing, a wedge-shaped gap is provided between the bearing and the rotating shaft to generate oil film dynamic pressure during rotation, and one end of the rotating shaft is fixedly connected to the wheel hub; The fan blade assembly is arranged in the circumference of the hub.

2. The fan assembly of the portable fan according to claim 1, characterized in that: The bearing comprises a bearing seat and a bearing bush installed in the bearing seat; An oil wedge portion is provided on the circumference of the inner surface of the bearing bush and / or the circumference of the outer surface of the rotating shaft.

3. The fan assembly of the portable fan according to claim 2, characterized in that: The oil wedge portion includes a plurality of cut surfaces arranged along the circumferential direction of the inner surface of the bearing bush, or the oil wedge portion includes a dynamic pressure groove arranged along the circumferential direction of the inner surface of the bearing bush.

4. The fan assembly of a portable fan according to any one of claims 1 to 3, characterized in that: The hub includes a main body and a support portion extending outward from the main body, the accommodating portion is formed in the main body, and the fan blade assembly includes a plurality of blades disposed on the support portion and arranged at intervals along the circumference of the support portion, and the blades are metal blades.

5. The fan assembly of the portable fan according to claim 4, characterized in that: The fan blade assembly also includes a connecting piece provided at one end of the blade away from the supporting portion; One end of each of the blades is plug-connected to the support portion, and the other end of each of the blades is plug-connected to the connector.

6. The fan assembly of the portable fan according to claim 5, characterized in that: A plurality of plug-in parts are respectively arranged on the supporting part and the connecting member, and plug-in parts which are matched and connected with the plug-in parts are correspondingly bent at two ends of the blade.

7. The fan assembly of the portable fan according to claim 4, characterized in that: Each of the blades comprises a first portion and a second portion having a larger width than the first portion; One end of each blade is plug-connected with the support portion, the second part of each blade is plug-connected with the body at a side close to the body, and the first part and the second part are flush with each other at a side away from the body.

8. The fan assembly of the portable fan according to claim 4, characterized in that: The fan blade assembly also includes a connecting piece provided at one end of the blade away from the supporting portion; One end of each of the blades is connected to the support portion via a first curling structure, and the other end of each of the blades is connected to the connecting member via a second curling structure.

9. The fan assembly of the portable fan according to claim 8, characterized in that: The first curling structure comprises a first clamping portion formed by curling the edge of the support portion and a first clamping ring provided at the bottom end of the outer side of the blade, the first clamping ring being cooperatively connected with the first clamping portion; The second curling structure includes a second clamping portion formed by curling the edge of the connecting member and a second clamping ring arranged at the top end of the outer side of the blade, and the second clamping ring is cooperatively connected with the second clamping portion.

10. A portable fan, characterized in that: A fan assembly of a portable fan as claimed in any one of claims 1 to 9 is provided in the shell and is provided in the shell.

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