CN2668899Y

CN2668899Y - Fan axle center drop-proof structure

Info

Publication number: CN2668899Y
Application number: CNU2003201243775U
Authority: CN
Inventors: 刘锦堂
Original assignee: PROTECHNIC ELECTRIC CO Ltd
Current assignee: PROTECHNIC ELECTRIC CO Ltd
Priority date: 2003-12-10
Filing date: 2003-12-10
Publication date: 2005-01-05
Anticipated expiration: 2013-12-10

Abstract

The utility model provides a fan axle center drop-proof structure, which is composed of a buckle ring seat with an opening, and an elastic buckle ring which is arranged on the buckle ring seat; the center of the elastic buckle ring forms two circular arc portions through respectively and outwardly protruding on the two opposing sides; the circular arc portions are surrounded on the inner side at the periphery of the opening of the buckle ring seat; and the designed space of the two circular arc portions is smaller than the diameter of one fan axle center and is larger than the diameter of the fan axle center groove. When the fan axle center passes through the opening of the buckle ring seat and the elastic buckle ring, the two circular arc portions of the elastic buckle ring can be expanded, and the friction force can be generated; when the fan axle center groove passes through the two circular arc portions, the elastic buckle ring which can recover to the original state before being expanded can be clamped in the fan axle center groove, so as to prevent the axle center from being dropped outwardly because of the force. The utility model makes use of the design of the elastic buckle ring component, so as to improve the deficiencies that the well known fan axle center can generate oversized friction force, and the surface of the fan axle center can be scratched when the fan axle center passes through the buckle ring.

Description

Fan shaft core drop-proof structure

Technical field

The utility model is a kind of drop-proof structure of fan shaft core, when referring to that especially a kind of and fan shaft core assemble, and the snap ring structure that the power of reducing friction produces.

Background technique

Fig. 1 is known fan portion separation structure generalized section, as seen from the figure, the flabellum 10 of fan is installed on the

core

12,12 in this core is arranged in the bearing 14, and when this electric fan 10 is subjected to external force twitch and drives an axle core 12 outwards to deviate from, one clasp 16 promptly can avoid flabellum 10 outwards to break away from axially bringing into play barrier effect thus, and guarantees that a core 12 and the relative position of bearing 14 can maintain within the scope of design.

Refer again to Fig. 2, above-mentioned clasp 16 is one to have the annulus of center hole, have a plurality of grooves 18 on it, these a little grooves 18 can reduce the structural strength of clasp 16, and allow center hole be strutted easily, when desire is assembled together fan shaft core 12 and clasp 16, axle core 12 needs to be imported by the center hole of clasp 16, because the aperture of this center hole is less than the diameter of axle core 12, so axle core 12 can strut clasp 16 center holes, when being arranged with axle core groove 20 in axle core 12 surfaces by clasp 16, just meeting is because of the diameter of axle core groove 20 aperture less than clasp 16 center holes, make clasp 16 recover, and and then be arranged in the core groove 20 by the original state before strutting.Yet because clasp 16 has the radial tension of certain degree, and center hole and fan shaft core are with the mutual rubbing contact of right angle turnover face, so when fan shaft core 12 passes through center hole, axle core 12 and clasp 16 are asked the surface of the frictional force meeting scratch axle core 12 that is produced, this disappearance is except that the smoothness that meeting influence axle core 12 turns round in bearing 14, and may cause clasp 16 bad, and influence the quality of fan and the life-span of running with 12 assemblings of axle core.

The model utility content

Main purpose of the present utility model, provide a kind of drop-proof structure of fan shaft core, utilize the design of a jump ring component, to reduce the frictional force that is produced when fan shaft core and clasp assemble, avoid a problem of wicking surface scratch thus, and increase the smoothness of fan running.

For achieving the above object, the fan shaft core drop-proof structure that the utility model provides comprises:

One clasp seat, its central authorities are provided with a perforate;

Outwards outstanding respectively two circular arc part that form of one spring retaining ring, its central two-phase opposite side, this spring retaining ring is located on this clasp seat, and this two circular arc is surrounded on this perforate inboard on every side; And a retaining ring cover, it is located on this clasp seat and presses the top of being located at this spring retaining ring, and these retaining ring cover central authorities are provided with a perforation.

Wherein the aperture of this perforate and this perforation is greater than the diameter of a fan shaft core, it is greater than the spacing of this two circular arc part, and be concaved with a fan shaft core groove on this fan shaft core in addition, its diameter then designs the spacing less than this two circular arc part, when this fan shaft core passes this perforate, this spring retaining ring and this perforation in regular turn, this two circular arc part can be strutted, when treating that this fan shaft core groove is advanced this two circular arc part, it just can be replied by the state before strutting, and is arranged in this fan shaft core groove.

Wherein an end of this spring retaining ring can be provided with an opening.

Wherein two ends of this spring retaining ring utilize a projection to position respectively.

Description of drawings

Below by the explanation of specific embodiment, contrast accompanying drawing again, when the effect that is easier to understand the purpose of this utility model, technology contents, characteristics and is reached.

Fig. 1 is known fan portion separation structure generalized section.

Fig. 2 is the schematic representation that known fan shaft core and clasp assemble.

Fig. 3 is a STRUCTURE DECOMPOSITION schematic representation of the present utility model.

Fig. 4 is a textural association schematic representation of the present utility model.

Fig. 5 and Fig. 6 are the schematic representation that the utility model and fan shaft core assemble.

Fig. 7 is for using fan portion separation structure generalized section of the present utility model.

Embodiment

As shown in Figures 3 and 4, be combination schematic representation of the present utility model and STRUCTURE DECOMPOSITION figure, as seen from the figure, the drop-proof structure of this fan spindle bearing comprises a clasp seat 30, its central authorities are provided with a perforate 32, the aperture design of this perforate 32 can provide the fan shaft core directly to pass greater than the diameter of a fan shaft core thus; And be arranged with a projection 34 in the both sides of perforate 32, one spring retaining ring 36 with opening promptly is located on the clasp seat 30, and position by two projections 34, these spring retaining ring 36 central two opposed side edges are outwards to protrude to form two circular arc part 38, it just can be surrounded on the inboard of clasp seat 30 perforates 32, and the spacing of this two circular arc part 38 design is less than the diameter of fan shaft core, and greater than the diameter of fan shaft core groove; Other has one to press the retaining ring cover 40 be located on the spring retaining ring 36, its role is to prevent that spring retaining ring 36 from getting loose, and these retaining ring cover 40 central authorities still have a perforation 42, and its aperture design is greater than the diameter of fan shaft core.

Refer again to Fig. 5 and Fig. 6, when the drop-proof structure of this fan spindle bearing and fan shaft core 44 assemble, because the diameter greater than fan shaft core 44 is all designed in the perforate 32 of clasp seat 30 and perforation 42 apertures of retaining ring cover 40, only two circular arc part, 38 spacings of spring retaining ring 36 are less than the diameter of fan shaft core 44, so work as the perforate 32 that fan shaft core 44 passes clasp seat 30 in regular turn, when spring retaining ring 36 and retaining ring cover 40, only two ' the circular arc part 38 of spring retaining ring 36 can be strutted by fan shaft core 44 and produces a frictional force, but because the radial tension of spring retaining ring 36 is very little, and with the surface of contact of fan shaft core 44 be slick and sly surface, therefore

spring retaining ring

36 and 44 frictional force that produced of fan shaft core are very little, situations such as unlikely generation scratch fan shaft core 44 surfaces or generation assembling are bad, in addition, when fan shaft core groove 46 passes through spring retaining ring 36, because fan shaft core groove 46 diameters are less than the spacing of two circular arc part 38, so spring retaining ring 36 can restore to the original state, and be arranged in 46 of fan shaft core grooves, prevent thus that fan shaft core 44 is subjected to external force and outwards break away from.

And for example shown in Figure 7, for using fan portion separation structure generalized section of the present utility model, because when the utility model and fan shaft core 44 assemble, can scratch fan shaft core 44 surfaces or the bad situation of assembling takes place, therefore fan shaft core 44 can turn round in bearing 48 smoothly, and can and then prolong working life of fan, in addition be subjected to external force and when driving fan shaft core 44 and outwards deviating from when flabellum 50, spring retaining ring 36 of the present utility model also can be brought into play fan shaft core 44 is fixedly arranged on effect in the bearing 48.

Above-described embodiment is preferred embodiment of the present utility model only, is not in order to limit the scope that the utility model is implemented.So all according to the described shape of the utility model claim, ditch make, feature and the spirit equalization of doing change and modify, all should be included in the claim of the present utility model.

Claims

1, a kind of fan shaft core drop-proof structure is characterized in that, comprising:

One clasp seat, its central authorities are provided with a perforate;

2, fan shaft core drop-proof structure as claimed in claim 1, it is characterized in that, wherein the aperture of this perforate and this perforation is greater than the diameter of a fan shaft core, it is greater than the spacing of this two circular arc part, and be concaved with a fan shaft core groove on this fan shaft core in addition, its diameter then designs the spacing less than this two circular arc part, this fan shaft core passes this perforate, this spring retaining ring and this perforation in regular turn, this two circular arc part is strutted, when treating that this fan shaft core groove is advanced this two circular arc part, it is replied by the state before strutting, and is arranged in this fan shaft core groove.

3, fan shaft core drop-proof structure as claimed in claim 1 is characterized in that, wherein an end of this spring retaining ring is provided with an opening.

4, fan shaft core drop-proof structure as claimed in claim 1 is characterized in that, wherein two ends of this spring retaining ring have projection location respectively.