CN218093564U - Fan shaft tube assembly and centrifugal cooling fan - Google Patents

Abstract

The utility model relates to a fan shaft tube component, which comprises a base and a shaft tube, wherein the shaft tube is fixedly arranged on the base and is provided with a bearing, a stator group is also arranged inside the shaft tube, and a gap is arranged between two convex blocks at the bottom of the shaft tube; through the design of the gap between the two convex blocks at the bottom of the shaft tube, the pressure inside the bearing can be released, so that the oil storage space inside the shaft tube assembly is increased, and the bottom of the shaft tube is not easy to deform.

Description

Fan shaft tube assembly and centrifugal cooling fan

Technical Field

The utility model relates to a radiator fan, especially a fan shaft pipe subassembly.

Background

Along with the science and technology development is faster and faster, the heat dissipation demand of current electron device is higher and higher, need to install radiator fan in electron device and be used for the heat dissipation, for better heat transfer performance, generally encapsulate at radiator fan's bearing inside and have lubricating oil, the flabellum axle core of being convenient for rotates.

However, in the production process of the cooling fan, when the bearing is installed into the shaft tube, the outer circle of the bearing is assembled with the inner circle of the shaft tube in a matching manner, and due to the actual existence of factors such as design tolerance, material, temperature, assembly tolerance and the like, the condition that the assembly and the matching of the bearing and the shaft tube are too loose or too tight often occurs; in addition, when the heat dissipation fan is actually operated, the lubricating oil (oil film) attached to the surface of the bearing and the surface of the axis of the fan wheel moves/flows due to the rotation of the axis, the change of temperature, the capillary force phenomenon, the centrifugal force and other factors, and the loose or tight fit between the bearing and the shaft tube affects the movement of the lubricating oil, thereby affecting the overall performance of the heat dissipation fan. For example, too tight a fit may impede lubricant flow; if the fitting is too loose, the fitting will shake to generate abnormal sound. Further, when the bearing is pressed into the shaft tube, pressure (external tension) is generated on the inner wall of the shaft tube, and the shaft tube may be deformed.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a fan shaft pipe subassembly aims at solving the oil storage space among the current radiator fan not enough, and the central siphon bottom that leads to when the central siphon is impressed to the bearing is out of shape, leads to the fan to cause unfavorable phenomena such as abnormal sound, vibrations at the function in-process.

The utility model provides a technical scheme as follows that its technical problem provides:

a fan shaft tube assembly comprises a shaft tube, wherein the shaft tube forms a shaft hole with an opening at one end, a plurality of bosses are arranged on the inner annular wall of the shaft tube, a lug connected with the bosses is arranged at one end, far away from the opening, of the inner annular wall of the shaft tube, and a gap is formed between two adjacent lugs along the circumferential direction of the shaft tube; and a plurality of bearings are arranged between the inner walls of the bosses in a limiting and assembling manner, and the bosses are used for bearing the bearings along the axial direction of the shaft tube. Along the circumferential direction of central siphon, two adjacent form the oil storage passageway between the boss, the breach constitutes the oil storage space, the oil storage space with the oil storage passageway is linked together. .

Further, along the circumferential direction of the shaft tube, the width of the oil storage channel is larger than that of the oil storage space; the depth of the oil storage channel in the radial direction of the shaft tube is smaller than the depth of the oil storage space in the axial direction of the shaft tube.

Further, the shaft tube comprises a hollow tubular shaft tube circumferential wall portion and a shaft tube bottom portion for sealing one end of the shaft tube circumferential wall portion, the boss is formed by protruding from an inner ring wall of the shaft tube circumferential wall portion to the shaft core, and the protruding blocks extend to be step-shaped from the axial direction and the radial direction of the shaft tube respectively.

Furthermore, a wear-resistant sheet is attached to the inner surface of the bottom of the shaft tube, and the wear-resistant sheet is located in the middle of the plurality of lugs along the radial direction of the shaft tube.

Furthermore, the lug and the boss are equal in number and are connected in a one-to-one correspondence mode.

Further, the number of the bosses is set to be not less than 4 and not more than 8.

Further, the protrusion thickness of the boss in the radial direction of the shaft tube is not less than 0.2 mm and not more than 0.5 mm.

Furthermore, the internal diameter of the shaft tube is less than 6 millimeters, and the width of the oil storage channel is 1/8 to 1/4 of the width of the boss along the circumferential direction of the shaft tube.

Further, the central siphon is the plastic material, the boss tight fit equipment of bearing and central siphon.

The utility model discloses in, there is a centrifugal radiator fan in addition, including install in flabellum, stator module and apron on the fan shaft subassembly.

The beneficial effects of the utility model reside in that:

compared with the prior art, the utility model discloses an axle tube subassembly includes base and bearing, through the design of the breach between two lugs in axle tube bottom, can release the inside pressure of bearing, not only makes the inside oil storage space of axle tube subassembly increase, and the difficult production of axle tube bottom is out of shape moreover.

Drawings

The invention will be further explained with reference to the drawings and examples, in which

Fig. 1 is an overall schematic view of a centrifugal fan provided by the present invention;

fig. 2 is an exploded schematic view of the centrifugal fan provided by the present invention, wherein the cover plate is not shown;

fig. 3 is a cross-sectional view of the fan base of the present invention, the specific cutting position is at the axial position of the axle tube;

fig. 4 is an enlarged schematic view of a dotted circle a in fig. 3.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in detail with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.

Referring to fig. 1 and 2, a fan shaft tube assembly according to a preferred embodiment of the present invention includes a base 10 and a shaft tube 20, the shaft tube 20 is fixedly disposed on the base 10, and a bearing 21 is inserted into a shaft hole 22 of the shaft tube 20.

Referring to fig. 3, specifically, the shaft tube 20 includes a hollow tubular shaft tube circumferential wall portion 202 and a shaft tube bottom portion 201 for sealing one end of the shaft tube circumferential wall portion 202, the shaft tube bottom portion 201 of the shaft tube 20 is connected to the fan base 10, the inner annular wall of the shaft tube circumferential wall portion 202 is provided with bosses 23, the number of the bosses 23 is set to be not less than 4 and not more than 8, and the protruding thickness of the bosses 23 along the radial direction of the shaft tube 20 is not less than 0.2 mm and not more than 0.5 mm. In this embodiment, the inner annular wall of the shaft tube circumferential wall portion 202 is provided with 4 bosses 23, which are symmetrically arranged with respect to each other, and the connecting position of the shaft tube circumferential wall portion 202 and the shaft tube bottom portion 201 of the shaft tube 20 respectively extends to form a step shape along the axial direction and the radial direction of the shaft tube 20 to form the protrusions 24, which are connected with the bosses 23, the protrusions 24 are located at the bottom of the bosses 23, the number of the protrusions 24 is equal to and one-to-one corresponding to that of the bosses 23, the protrusions 24 protrude from the bosses 23 in the radial direction of the shaft tube 20, and a gap 25 is formed between every two adjacent protrusions 24. The recess 25 forms a bottom oil storage space S2.

Specifically, the bearing 21 is disposed in the shaft tube 20 of the base 10, and an oil storage channel S1 is formed between two adjacent bosses 23 in the circumferential direction of the shaft tube 20, and the oil storage channel S1 is communicated with the oil storage space S2. The width of the oil storage passage S1 is greater than the width of the oil storage space S2 in the circumferential direction of the shaft tube 20, and the depth of the oil storage passage S1 in the radial direction of the shaft tube 20 is less than the depth of the oil storage space S2 in the axial direction of the shaft tube 20. The inner diameter of the shaft tube 20 is less than 6 mm and the width of the oil storage passage S1 is 1/8 to 1/4 of the width of the boss 23. The outer peripheral wall of the bearing 21 may further have a plurality of axially extending strip-shaped grooves, that is, the gap between the strip-shaped groove and two adjacent bosses 23 in the shaft tube 20 also forms an oil storage channel S1, so that the lubricating oil can be more easily guided from the oil storage channel S1 into the oil storage space S2 at the bottom of the shaft tube 20.

As shown in fig. 1, the present invention further includes a centrifugal heat dissipation fan, which includes the above fan shaft assembly and fan blades 50, the stator assembly 40, the wear-resistant plate 30, the shaft core 211, and the cover plate. The shaft core 211 is inserted in the center of the bearing 21, the stator assembly 40 is fixed on the base 10, and the fan blades 50 are installed above the shaft tube assembly.

Specifically, as shown in fig. 2, the bearing 21 is an oil-retaining bearing 21, the stator assembly 40 is sleeved on the outer circumferential wall of the shaft tube 20, the shaft tube 20 is made of plastic material, the oil-retaining bearing 21 is tightly assembled with the boss 23 in the shaft tube 20, a fastening portion is arranged on the outer wall of the shaft tube 20 and extends axially, a fastening groove corresponding to the fastening portion is arranged on the stator assembly 40, and the shaft tube 20 and the stator assembly 40 can be tightly assembled with each other, so that the stator assembly 40 and the shaft tube 20 are combined more stably, it should be noted that the stator assembly 40 and the shaft tube 20 can also be fixed by adopting adhesion or other appropriate matching methods.

Specifically, a retaining ring 203 is further provided above the bearing 21 so that the bearing 21 is fixed inside the shaft tube 20.

Specifically, this fan shaft pipe subassembly still can include a axle sleeve, and this axle sleeve is made by plastic materials, is cylindrically, and bearing 21 holding back in this axle sleeve, this axle sleeve and central siphon can press the shore each other for bearing 21 and central siphon 20 combination are more firm, and difficult come-up and this bearing 21 of location also can prevent that the relative central siphon 20 of axle sleeve itself from taking place to rotate simultaneously.

Specifically, the wear-resistant piece 30 is attached to the bottom portion 201 of the shaft tube 20, and the wear-resistant piece 30 is located between the protrusions 24 along the radial direction of the shaft tube 20, i.e. between the shaft core 211 and the bottom portion 201 of the shaft tube 20, so as to prevent the friction between the ball end of the shaft core 211 and the bottom portion of the shaft tube 20 when the fan rotates, and thus the loss is generated.

Specifically, the shaft tube 20 is directly integrally formed to the base 10, thereby reducing the number of assembly parts.

Compared with the prior art, the utility model provides a pair of fan shaft pipe subassembly, when the fan function, when the lubricating oil in the bearing 21 passed the bearing 21 main part, owing to receive hindrance and guide effect, lubricating oil can circulate in oil storage passageway S1 to can flow into oil storage space S2, make being difficult to reduce of lubricating oil, and the pressure that produces when bearing 21 impresses can release through breach 25 in the lug 24 of central siphon 20, make bearing 21 difficult production when impressing central siphon 20 warp.

The utility model discloses in, there is a centrifugal radiator fan in addition, including install in flabellum, stator module and apron on the fan shaft subassembly.

It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims (10)

1. A fan shaft assembly, comprising:

a base (10);

a shaft tube formed with a shaft hole (22) having one end opened;

a plurality of bosses (23) are arranged on the inner annular wall of the shaft tube (20), a plurality of lugs (24) connected with the bosses (23) are arranged at one end, far away from the opening, of the inner annular wall of the shaft tube (20), and a gap (25) is arranged between two adjacent lugs (24) along the circumferential direction of the shaft tube (20);

a bearing (21) is limited and assembled among the inner walls of the bosses (23), and the bosses (24) are used for bearing the bearing (21) along the axial direction of the shaft tube (20);

an oil storage channel (S1) is formed between two adjacent bosses (23) along the circumferential direction of the shaft tube (20);

the gap (25) forms an oil storage space (S2), and the oil storage space (S2) is communicated with the oil storage channel (S1).

2. The fan shaft tube assembly according to claim 1, wherein the width of the oil storage passage (S1) is greater than the width of the oil storage space (S2) in the circumferential direction of the shaft tube (20); the depth of the oil storage channel (S1) along the radial direction of the shaft tube (20) is smaller than the depth of the oil storage space (S2) along the axial direction of the shaft tube (20).

3. The fan shaft tube assembly according to claim 1 or 2, wherein the shaft tube (20) includes a hollow tubular shaft tube circumferential wall portion (202) and a shaft tube bottom portion (201) for blocking one end of the shaft tube circumferential wall portion (202), the boss (23) is formed by protruding from an inner annular wall of the shaft tube circumferential wall portion (202) toward a shaft core, and the protrusion (24) is formed by extending a connecting position of the shaft tube circumferential wall portion (202) and the shaft tube bottom portion (201) of the shaft tube (20) in a step shape along an axial direction and a radial direction of the shaft tube (20), respectively.

4. The fan shaft tube assembly of claim 3, characterized in that a wear-resistant sheet (30) is affixed to the inner surface of the shaft tube bottom (201) of the shaft tube (20), said wear-resistant sheet (30) being located in the middle of the plurality of bumps (24) in the radial direction of the shaft tube (20).

5. The fan shaft tube assembly according to claim 1 or 2, characterized in that the projections (24) are connected with the bosses (23) in equal number and in one-to-one correspondence.

6. The fan shaft pipe assembly according to claim 1 or 2, wherein the number of the bosses (23) is set to not less than 4 and not more than 8.

7. The fan shaft tube assembly according to claim 6, wherein a projecting thickness of the boss (23) in the radial direction of the shaft tube (20) is not less than 0.2 mm and not more than 0.5 mm.

8. The fan shaft tube assembly according to claim 1 or 2, wherein the inner diameter of the shaft tube (20) is less than 6 mm, and the width of the oil storage passage (S1) is 1/8 to 1/4 of the width of the boss (23) along the circumferential direction of the shaft tube (20).

9. The fan shaft tube assembly of claim 1 or 2, wherein the shaft tube (20) is made of plastic, and the bearing (21) is tightly fitted and assembled with the boss (23) of the shaft tube (20).

10. A centrifugal radiator fan comprising the fan shaft assembly of any one of claims 1 to 9, wherein: the fan shaft assembly further comprises fan blades (50) mounted on the fan shaft assembly, a stator assembly (40) and a cover plate.

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