CN201057164Y

CN201057164Y - Shaft sleeve of fan

Info

Publication number: CN201057164Y
Application number: CNU200720066894XU
Authority: CN
Inventors: 周竝贤
Original assignee: Individual
Current assignee: Individual
Priority date: 2007-01-31
Filing date: 2007-01-31
Publication date: 2008-05-07
Anticipated expiration: 2017-01-31

Abstract

The utility model relates to an axle sleeve used for a fan, which is positioned in the stator of the fan and provided space for a bearing to be installed inside. A retraining part is arranged on the bottom of the inner hole of the axle sleeve projecting towards inside in radial direction; a fixing part is arranged on the top; by means of the effect of the restraining part and the fixing part, the bearing that is arranged inside the axle sleeve is fastened to form a module group; thereby, the axle sleeve and the bearing positioned inside the axle sleeve can be combined in a loosing way or with little contacting; moreover, the restraining part and the fixing part are fixed at the upper end and lower end of the bearing, thus reducing the problem of poor quality caused by the interference fit level variation between the axle sleeve and the bearing and being capable of improving assembly efficiency.

Description

The axle sleeve of fan

Technical field

The utility model is about a kind of fan, refers to that especially a kind of shaft sleeve structure that provides bearing pack to establish wherein in this fan of being located at designs.

Background technique

Present known fan design, as shown in Figure 4, the composition of this fan mainly is to comprise a circuit board 31, one stator 32, one rotor 33 and one group of bearing pack 34, or embodiment as shown, this fan further comprises a housing 30, each parts of taking off before providing are provided with in it, wherein, this stator 32 is to be installed on this circuit board 31, this stator 32 has several magnetic pole strengths, and be arranged with coil, these coil two ends electrically connect on this circuit board 31, this rotor 33 has the end that impeller 332 that an axle 331 and has several blades is located at this axle 331, and be hubbed in this stator 32 with this axle 331, these rotor 33 inside have permanent magnet, magnetic pole strength corresponding to this stator 32, this bearing pack 34 is to be arranged at this stator 32 inside, this bearing pack 34 comprises that an axle sleeve 341 and at least one bearing 342 are installed in this axle sleeve 341, and provide the axle 331 of this rotor 33 to be pivoted wherein with this bearing 342, utilize circuit board 31 energisings by this, make the coil excitation of stator 32 and make those magnetic pole strengths produce N, the magnetic polarity of S, and then utilize those magnetic pole strengths to inhale mutually with respect to the different magnetic of the permanent magnet of rotor 33, with the principle that magnetic is repelled each other, rotate and drive this rotor 33.

In the fan of taking off only, general traditional bearing pack group is established mode, be to make bearing and axle sleeve adopt interference fit, the amount of interference size of this interference fit relates to the machining accuracy of manufacturing, wherein: when the amount of interference of bearing and shaft room is excessive, easily cause axle sleeve oppressing bearing, cause bearing that the axle of rotor is produced the crowded bundle heart and rotate phenomenon such as different sound, and the working life of reducing this fan; When the amount of interference of bearing and shaft room is too small, cause bearing to embed the combination force deficiency of shaft room, and the loosening facts is arranged, in the rotor rotation process of fan, the axle of rotor and the anxiety that stator breaks away from are arranged easily.In addition, in the composition structure because of this fan, the parts of its use are many, cause the uncontrollable parameter of this fan many, and its overall package benefit is reduced.

Summary of the invention

Main purpose of the present utility model is to provide a kind of axle sleeve of fan, uncommon design by this, and quality is difficult for the shortcoming of management and control when making up with axle sleeve in order to overcome bearing in the known fan.

Take off purpose for before reaching, the designed axle sleeve of the utility model is to comprise an endoporus, a stopper part and a fixing part, this endoporus forms in this axle sleeve inside, this stopper part forms in this axle sleeve bottom and is radial projection shape inwardly from this endoporus root edge, formation one aperture is communicated with this endoporus less than the penetration hole of endoporus in this stopper part, and this fixing part is to be located at this axle sleeve top.

In the aforesaid axle sleeve, this fixing part can be the position of the bent radial inwardly that forms in this axle sleeve top.

The utility model is by preceding taking off the shaft sleeve structure design, its characteristics are: the utility model is the stopper part that utilizes its bottom set, reach designs such as the set fixing part in top, make the bearing that is installed in this axle sleeve inside and this shaft room can a little interference or the loose fit mode make up, in addition by this stopper part and fixing part in the axle sleeve lower end and the upper end bearing fixed and formed a module, by this, minimizing causes the quality of fan bad because of the variation of the amount of interference between axle sleeve and bearing, and can improve packaging efficiency.

The accompanying drawing summary

Fig. 1 is the generalized section of a preferred embodiment of the utility model axle sleeve.

Fig. 2 is a bearing module is formed in axle sleeve preferred embodiment shown in first figure in conjunction with bearing a section decomposing schematic representation.

Fig. 3 is that bearing module shown in second figure is installed in the schematic representation in the fan.

Fig. 4 is the generalized section that present known fan is formed.

Embodiment

As shown in Figure 1, it is a preferred embodiment that discloses the axle sleeve of the utility model fan, by can see among the figure and, this axle sleeve 10 is members of a pipe shape, this axle sleeve 10 comprises an endoporus 11, a stopper part 12 and a fixing part 13, this endoporus 11 is to form in this axle sleeve 10 inside, wherein forms a module (as shown in Figure 2) in order at least one bearing 20 installings to be provided.

In aforementioned, the stopper part 12 of this axle sleeve 10 is to form in these axle sleeve 10 bottoms to be radial projection shape inwardly from these endoporus 11 root edges, this stopper part 12 is inner and form an aperture and be communicated with these endoporus 11 less than the penetration hole 14 of endoporus, this fixing part 13 can be form in one of these axle sleeve 10 tops can be towards the position of inner bending, or be outer parts that are added on these axle sleeve 10 tops, in this preferred embodiment, this fixing part 13 is to form in this axle sleeve 10 tops, and inside is to form the cumulative reaming shape in aperture outwardly from endoporus 11 tops, make this fixing part 13 form the gradually thin shape of thickness from inside to outside, make this fixing part 13 have the function of bent radial inwardly.

This axle sleeve 10 is when using, be to make bearing 20 be mounted in this axle sleeve 10 in advance, 10 on this bearing 20 and this axle sleeve can a little interference or the loose fit mode make up, described bearing 20 can use ball bearing, oil-impregnated bearing, ... or other forms of bearing, as shown in Figure 2, in this preferred embodiment, be to disclose this bearing 20 for including the oil-impregnated bearing of lubricant oil, the external diameter of this bearing 20 is corresponding to endoporus 11 apertures of this axle sleeve 10, this bearing 20 is not insert in the endoporus 11 of this axle sleeve 10 before the fixing part 13 of this axle sleeve 10 bends, and held by the stopper part 12 of these axle sleeve 10 bottoms, secondly, bend the fixing part 13 on these axle sleeve 10 tops, this bearing 20 is fixed in this axle sleeve 10 inner bearing modules 1 that form.

The utility model is by preceding taking off axle sleeve 10 designs, after it forms a bearing module 1 in conjunction with bearing 20, can be mounted in the fan, as shown in Figure 3, this bearing module 1 can be fixedly arranged in the housing 2 of this fan, and installs circuit board 3 and stator 4 in regular turn in this bearing module 1 outside, the coil of this stator 40 and electrically connect with this circuit board 3, secondly the axle 6 with rotor 5 provides in the bearing 20 of this bearing module 1, is buckled in the end of this axle 6 with a clasp 7 again, and forms a fan.So, this fan can be after circuit board 3 energising, makes stator 4 excitatory and produce magnetic force in order to drive rotor 5 rotations, makes this rotor 5 rotations produce air-flows, as the purposes for the treatment of the radiator heat radiation.

Claims

1. the axle sleeve of a fan, it is characterized in that: this axle sleeve comprises an endoporus, a stopper part and a fixing part, this endoporus forms in this axle sleeve inside, this stopper part forms in this axle sleeve bottom and is radial projection shape inwardly from this endoporus root edge, formation one aperture is communicated with this endoporus less than the penetration hole of endoporus in this stopper part, and this fixing part is to be located at this axle sleeve top.

2. the axle sleeve of fan as claimed in claim 1, it is characterized in that: the fixing part of this axle sleeve is the position that forms in the bent radial inwardly on this axle sleeve top.

3. the axle sleeve of fan as claimed in claim 2 is characterized in that: the fixing part inside on this axle sleeve top is to be to form the cumulative reaming shape in aperture outwardly from the endoporus top.