阅读说明：本技术 含油轴承结构及包含该结构的薄型风扇 (Oil-retaining bearing structure and thin fan comprising same ) 是由 张永康 林永彬 杨剑威 于 2020-05-08 设计创作，主要内容包括：一种含油轴承结构,应用于风扇,包括轴心座、转轴、含油轴承,所述轴心座上设置有凸台,所述凸台中心处内凹形成槽孔,所述转轴的轴线及所述含油轴承的轴线垂直于所述轴心座设置,所述转轴一端插设在所述槽孔内,另外一端向形成自由端,所述含油轴承套设在所述转轴的外周,所述含油轴承与所述转轴的有效长度为所述风扇厚度的50-70％。所述薄型风扇,使用上述所述的含油轴承结构。通过增加轴承对转轴的接触面有效长度,使轴承对转轴的包裹性更好,可使转轴转动时更加稳定,使转轴的径向荷载承受力增强,可有效延长转轴的寿命,也能够有效降低转轴转动时的噪声。(The utility model provides an oiliness bearing structure, is applied to the fan, includes axle center seat, pivot, oiliness bearing, be provided with the boss on the axle center seat, boss center department indent forms the slotted hole, the axis of pivot reaches oiliness bearing's axis perpendicular to the axle center seat sets up, pivot one end is inserted and is established in the slotted hole, and one end is to forming the free end in addition, the oiliness bearing cover is established the periphery of pivot, oiliness bearing with the effective length of pivot is 50-70% of fan thickness. The thin fan uses the oil-retaining bearing structure. The effective length of the contact surface of the bearing on the rotating shaft is increased, so that the wrapping performance of the bearing on the rotating shaft is better, the rotating shaft can be more stable when rotating, the radial load bearing capacity of the rotating shaft is enhanced, the service life of the rotating shaft can be effectively prolonged, and the noise of the rotating shaft during rotating can be effectively reduced.)

1. The utility model provides an oiliness bearing structure, is applied to the fan, includes axle center seat, pivot, oiliness bearing, be provided with the boss on the axle center seat, boss center department indent forms the slotted hole, the axis of pivot reaches oiliness bearing's axis perpendicular to the axle center seat sets up, pivot one end is inserted and is established in the slotted hole, one end is to forming the free end in addition, the oiliness bearing cover is established the periphery of pivot, its characterized in that: the effective length of the oil-containing bearing and the rotating shaft is 50-70% of the thickness of the fan.

2. The oil-impregnated bearing structure according to claim 1, wherein: and an oil film is injected between the contact surfaces of the rotating shaft and the oil-retaining bearing.

3. The oil-impregnated bearing structure according to claim 1, wherein: the clearance between the oil-retaining bearing and the boss is 0.15-0.25 mm.

4. The oil-impregnated bearing structure according to claim 1, wherein: the oil-retaining bearing is directional boss one end is provided with the supporting part, the supporting part encircles and establishes the boss periphery, in order to realize the oil-retaining bearing is fixed on the boss, the oil-retaining bearing is kept away from axle center seat one end is provided with the base, be provided with on the base and fix the fixing device of oil-retaining bearing position.

5. The oil-impregnated bearing structure according to claim 4, wherein: fixing device is for setting up solid fixed ring on the base, gu fixed ring laminating sets up oiliness bearing's periphery, gu fixed ring one end is fixed on the base, the other end is equipped with the spacing ring, spacing ring is to oiliness bearing's terminal surface extends the setting.

6. The oil-impregnated bearing structure according to claim 5, wherein: the pivot points to base one end is provided with wear pad, wear pad respectively with the base reaches the pivot is laminated the setting each other.

7. A thin fan is characterized in that: the oil-impregnated bearing structure according to any one of claims 1 to 6, wherein the fan includes a motor assembly, fan blades, and a fan housing, the outer periphery of the hub base extends toward the free end of the rotating shaft to form an extension, the fan blades are fixed to the outer periphery of the extension, and the motor assembly is located inside the extension.

8. The thin fan as claimed in claim 7, wherein: the motor assembly structure comprises a motor and a motor shell, the motor is fixedly arranged on the periphery of the oil-retaining bearing, and the motor shell is fixedly attached to the inner side of the extending part.

9. The thin fan as claimed in claim 7, wherein: the fan shell comprises a fan bottom cover and a fan frame, the fan bottom cover is circular, the fan frame is arranged on the edge of the fan frame in a surrounding mode, the fan bottom cover is located at one end, away from the shaft center seat, of the rotating shaft, and the fan frame is located on one side, towards the shaft center seat, of the fan bottom cover.

10. The thin fan as claimed in claim 9, wherein: the fan shell further comprises an upper cover, the upper cover is in a circular ring shape, and the periphery of the upper cover is fixedly arranged on the fan frame.

Technical Field

The present disclosure relates to fan structures, and particularly to an oil-retaining bearing structure and a thin fan including the same.

Background

This section is intended to provide a background or context to the embodiments of the application that are recited in the claims. The description herein is not admitted to be prior art by inclusion in this section.

The fan is a key component of a computer cooling system, and the improvement of the service life and the reliability of the fan are important for ensuring the stable operation of the computer system. The bearing lubrication and sealing design of the fan plays a significant role in prolonging the service life of the fan and reducing noise.

Since the oil-impregnated bearing (i.e., sleeve bearing) has characteristics of low cost and low noise at the initial stage of operation, the oil-impregnated bearing is widely used for the fan. When the oil-retaining bearing is in a non-operation state, the pores are filled with lubricating oil, and when the oil-retaining bearing is in operation, the shaft rotates to generate heat due to friction, and the pores are reduced due to the thermal expansion of the bearing bush, so that the lubricating oil overflows and enters the bearing gaps. After the shaft stops rotating, the bearing bush is cooled, the pore space is recovered, and the lubricating oil is sucked back to the pore space. Because of the importance of the oil bearing, the service life of the oil bearing directly influences the service life of the whole fan.

Disclosure of Invention

In view of the above, there is a need for an improved oil-impregnated bearing.

The technical scheme provided by the application is as follows:

the utility model provides an oiliness bearing structure, is applied to the fan, includes axle center seat, pivot, oiliness bearing, be provided with the boss on the axle center seat, boss center department indent forms the slotted hole, the axis of pivot reaches oiliness bearing's axis perpendicular to the axle center seat sets up, pivot one end is inserted and is established in the slotted hole, and one end is to forming the free end in addition, the oiliness bearing cover is established the periphery of pivot, oiliness bearing with the effective length of pivot is 50-70% of fan thickness.

In some embodiments of the present application, an oil film is injected between the contact surfaces of the rotating shaft and the oil-containing bearing.

In some embodiments of the present application, the clearance between the oil impregnated bearing and the boss is between 0.15 and 0.25 mm.

In some embodiments of this application, the oiliness bearing is directional boss one end is provided with the supporting part, the supporting part encircles and establishes the boss periphery, in order to realize the oiliness bearing is fixed on the boss, the oiliness bearing is kept away from arbor center seat one end is provided with the base, be provided with on the base and fix the fixing device of oiliness bearing position.

In some embodiments of this application, fixing device is for setting up solid fixed ring on the base, gu the fixed ring laminating sets up the periphery of oiliness bearing, gu fixed ring one end is fixed on the base, gu fixed ring keeps away from base one end to the terminal surface extension of oiliness bearing is provided with the spacing ring.

In some embodiments of the present application, an end portion of the rotating shaft, which is directed to the base, is provided with a wear pad, and two side surfaces of the wear pad are respectively attached to the base and the end surface of the rotating shaft.

Another objective of this application is to provide a slim fan, use the aforesaid oiliness bearing structure, the fan includes motor element, flabellum and fan casing, the axle center seat periphery to the pivot free end extends to set up and forms the extension, the extension is ring shape, the flabellum is fixed the periphery of extension, motor element is located the inboard of extension.

In some embodiments of the present application, the motor assembly structure includes a motor and a motor housing, the motor is fixedly disposed on the outer circumference of the oil-retaining bearing, and the motor housing is fixedly attached to the inner side of the extension portion.

In some embodiments of the present application, the fan housing includes a fan bottom cover and a fan frame, the fan bottom cover is circular, the fan frame is disposed around an edge of the fan frame, the fan bottom cover is located at an end of the rotating shaft away from the axle seat, and the fan frame is located at an end of the fan bottom cover pointing to the axle seat.

In some embodiments of the present application, the fan housing further includes an upper cover, the upper cover is in a circular ring shape, and the periphery of the outer periphery of the upper cover is fixedly disposed on the fan frame.

Above-mentioned the oiliness bearing structure makes the parcel nature of bearing to the pivot better through increasing the effective length of bearing to the contact surface of pivot, can make the pivot more stable when rotating on the one hand, makes the radial load bearing capacity reinforcing of pivot simultaneously, can effectively prolong the life of pivot, and on the other hand also can effectively reduce noise when the pivot rotates. And simultaneously, the gravity center of the rotor is close to the center of the bearing, so that the interaction force of the rotating shaft and the bearing is more balanced, and the service life is prolonged.

Drawings

The present application will be described in further detail with reference to the following drawings and detailed description.

Fig. 1 is a schematic cross-sectional view of a thin fan according to an embodiment of the present disclosure.

Fig. 2 is a schematic cross-sectional view of an oil-impregnated bearing structure according to an embodiment of the present application.

Description of reference numerals:

the following detailed description will further describe embodiments of the present application in conjunction with the above-described figures.

Detailed Description

In order that the above objects, features and advantages of the embodiments of the present application can be more clearly understood, a detailed description of the present application will be given below with reference to the accompanying drawings and detailed description. In addition, the features of the embodiments of the present application may be combined with each other without conflict.

In the following description, numerous specific details are set forth to provide a thorough understanding of embodiments of the application, and the described embodiments are merely a subset of embodiments of the application, rather than all embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application without any creative effort belong to the protection scope of the embodiments in the present application.

Defining: the effective length in this application refers to the effective length of the contact surface between the oil-retaining bearing and the axis of the rotating shaft (refer to l in FIG. 2)₀)。

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the embodiments of this application belong. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the embodiments of the present application.

The application provides an oiliness bearing structure and contain slim fan of this structure, wherein oiliness bearing structure is applied to the fan, including axle center seat, pivot, oiliness bearing, be provided with the boss on the axle center seat, boss center department indent forms the slotted hole, the axis of pivot reaches oiliness bearing's axis perpendicular to the axle center seat sets up, pivot one end is inserted and is established in the slotted hole, one end is to forming the free end in addition, the oiliness bearing cover is established the periphery of pivot, oiliness bearing with the effective length of pivot does 50-70% of fan thickness. The thin fan is characterized in that the oil-retaining bearing structure is used, the fan comprises a motor assembly, fan blades and a fan shell, the periphery of the shaft base extends towards the free end of the rotating shaft to form an extending part, the extending part is in a circular ring shape, the fan blades are fixed on the periphery of the extending part, and the motor assembly is located on the inner side of the extending part.

The percentage that the effective length of the oiliness bearing of design and pivot accounts for fan thickness usually is greater than 40% and be less than 50%, and this application makes the wrapping nature of bearing to the pivot better through increasing the effective length of the contact surface of bearing to the pivot, and is more stable when can making the pivot rotate on the one hand, makes the radial load bearing capacity reinforcing of pivot simultaneously, can effectively prolong the life of pivot, and on the other hand also can effectively reduce noise when the pivot rotates. And simultaneously, the gravity center of the rotor is close to the center of the bearing, so that the interaction force of the rotating shaft and the bearing is more balanced, and the service life is prolonged.

The following detailed description will further describe embodiments of the present application in conjunction with the above-described figures.

Referring to fig. 1 and 2, a slim fan 100 includes an oil-retaining bearing structure 10, a motor assembly 20, a plurality of fan blades 30, and a fan housing 50, wherein the oil-retaining bearing structure 10 is disposed at a central position of the slim fan 100, and the motor assembly 20, the plurality of fan blades 30, and the fan housing 50 are sequentially disposed at an outer periphery of the oil-retaining bearing structure 10 from inside to outside.

Referring to fig. 2, the oil-retaining bearing structure 10 includes a shaft base 11, a rotating shaft 12, an oil-retaining bearing 13 and a base 15, the shaft base 11 and the base 15 are both disposed in a disc shape, the shaft base 11 and the base 15 are disposed substantially in parallel, the rotating shaft 12 and the oil-retaining bearing 13 are located between the shaft base 11 and the base 15, an axis of the rotating shaft 12 and an axis of the oil-retaining bearing 13 are both disposed perpendicular to a plane where the shaft base 11 is located, and in an embodiment, an effective length between the oil-retaining bearing 13 and the rotating shaft 12 accounts for 60% of a thickness of the thin fan 100. In other embodiments, the effective length between the oil-retaining bearing 13 and the rotating shaft 12 is 50-70% of the thickness of the low profile fan 100.

Referring to fig. 2, the axle center base 11 includes a boss 111 and an extension portion 113, the boss 111 is cylindrical and is located on a side surface of the axle center base 11 facing the base 15, and a slot 1111 is formed in the boss 111 for fixing the rotating shaft 12. The extension portion 113 is formed by extending the outer circumference of the spindle base 11 to one end of the base 15, and the extension portion 113 is annular.

The rotating shaft 12 is inserted into the slot 1111 of the spindle base 11, and a layer of oil film 121 covers the periphery of the rotating shaft 12. The oil bearing 13 is sleeved on the rotating shaft 12, and a shaft center hole is formed in the center of the oil bearing 13 and used for penetrating through the rotating shaft 12. In an embodiment, the outer diameter of the oil-retaining bearing 13 is larger than the outer diameter of the boss 111, a supporting portion 131 is disposed at one end of the oil-retaining bearing 13, which points to the hub base 11, the supporting portion 131 covers the outer periphery of the boss 111, and a gap between the oil-retaining bearing 13 and the boss 111 is 0.15 mm. Through the arrangement of the supporting part 131, the effective length between the oil-containing bearing 13 and the rotating shaft 12 is increased, so that the wrapping performance of the oil-containing bearing 13 on the rotating shaft 12 is better. And the gap between the oil bearing 13 and the boss 111 is limited, so that the brake oil loss of the oil bearing inner tone can be effectively prevented. In other embodiments, the clearance between the oil-impregnated bearing 13 and the boss 111 may also be set to a value of 0.15-0.25 mm.

The base 15 is used for butt the pivot 12 keeps away from axle center seat 11 one end, be provided with solid fixed ring 151 and wear pad 153 on the base 15, gu fixed ring 151 encircles and establishes the periphery of oiliness bearing 13, gu fixed ring 151 keeps away from base 15 one end and is provided with spacing ring 1511, spacing ring 1511 butt is in the supporting part 131 deviates from oiliness bearing 13 one end. The wear-resistant sheet 153 is disposed on a side surface of the base 15 facing the rotating shaft 12, specifically, the wear-resistant sheet 153 is disposed on an end portion of the rotating shaft 12, and the wear-resistant sheet 153 is respectively disposed in contact with the end surfaces of the base 15 and the rotating shaft 12.

Referring to fig. 1, the motor assembly 20 is disposed inside the extension portion 113, the motor assembly 20 includes a motor 21, a glue magnet 23 and a motor shell 25, the motor 21 is fixedly disposed on the periphery of the fixing ring 151, the motor shell 25 is attached to the inner wall of the extension portion 113, the glue magnet 23 is located between the motor 21 and the motor shell 25, and the glue magnet 23 is fixed on the inner wall of the motor shell 25. In one embodiment, a printed circuit board is further fixed to the motor 21.

The fan blades 30 are arranged on the periphery of the extending portion 113, the fan blades 30 are arranged in a circumferential array, a fixing structure extends from the fan blades 30 to the extending portion 113, the fan blades 30 are fixedly arranged on the extending portion 113 through the fixing structure, and in one embodiment, the fixing structure is a free end extending from the extending portion 113 to one side of the fan blades 30.

The fan housing 50 covers the periphery of the fan blades 30, the fan housing 50 includes a fan bottom cover 51 and a fan frame 53, the fan bottom cover 51 is disposed approximately coplanar with the base 15, the fan bottom cover 51 is in a circular disc shape, the fan frame 53 is disposed around the periphery of the fan bottom cover 51, and the fan frame 53 is located on one side of the fan chassis, which points to the hub base 11. In other embodiments, the fan housing 50 further includes an upper cover 55, the upper cover 55 is located at an end of the fan frame 53 away from the fan bottom cover 51, and the upper cover 55 is annular.

The effective length of the oil-retaining bearing and the rotating shaft which are designed commonly accounts for more than 40 percent of the length of the fan and less than 50 percent of the length of the fan, the effective length of the contact surface of the bearing to the rotating shaft is increased, so that the wrapping performance of the bearing to the rotating shaft is better, the rotating shaft can rotate more stably on one hand, the radial load bearing capacity of the rotating shaft is enhanced simultaneously, the service life of the rotating shaft can be effectively prolonged, and on the other hand, the noise generated when the rotating shaft rotates can also be effectively reduced. And simultaneously, the gravity center of the rotor is close to the center of the bearing, so that the interaction force of the rotating shaft and the bearing is more balanced, and the service life is prolonged.

Although the embodiments of the present application have been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof without departing from the spirit and scope of the embodiments of the present application.