CN104033493A

CN104033493A - Bearing fixing structure

Info

Publication number: CN104033493A
Application number: CN201310073148.3A
Authority: CN
Inventors: 苗茂科; 锺文主; 黄井平
Original assignee: Shenzhen Qixinghong Technology Co Ltd
Current assignee: Shenzhen Qixinghong Technology Co Ltd
Priority date: 2013-03-07
Filing date: 2013-03-07
Publication date: 2014-09-10
Anticipated expiration: 2033-03-07
Also published as: CN104033493B

Abstract

A bearing fixing structure comprises a bearing arranged in a shaft tube of a pedestal. The bearing has a close fit plug connection with a shaft center. A bearing fixing shell for accommodating the bearing is arranged between the bearing and the shaft tube. The bearing closely cooperates with the bearing fixing shell. The bearing fixing shell loosely cooperates with the shaft tube. The shaft tube has a at least one radial spacing portion, and the radial spacing portion abuts the at least one lug of the bearing fixing shell to restrict the radial rotation of the bearing fixing shell. An elastic element is arranged in the shaft tube, and is positioned below the bearing fixing shell in order to provide a preload pressure for the bearing fixing shell.

Description

Bearing fixing structure

Technical field

The present invention is a kind of bearing fixing structure, especially refers to a kind of bearing fixing structure that is applied to motor.

Background technique

General known bearing structure, that bearing is directly placed in a beam barrel of a pedestal, then the axle center endoporus of this bearing of pegging graft, wherein the endoporus of this axle center and bearing coordinates in the mode of loose fit, and an external diameter of this bearing coordinates with the mode of this beam barrel with loose fit.But because axle center connects a rotor, to be driven by this rotor, when rotating, rotor can produce concentric deviation, moreover the concentricity of rotor itself and amount of unbalance, after rotor running, easily cause axle center and brearing bore, and between bearing and the beam barrel of pedestal, produce the phenomenon of wriggling, after long time running, will cause different sound, and then affect the life-span of whole motor.So-called wriggling refers on loose fit or the very little bearing fit face of magnitude of interference, caused low speed skimming wear while there is relative movement each other, although this slippage is minimum, but occur in, be difficult to apply lubricated place, therefore wear extent strengthens gradually, bearing lost efficacy because of the matching loose of outer shroud.

After have into person, the two kind known configurations of proposition as shown in Figure 1A and Figure 1B, as shown in Figure 1A, comprise that a pedestal 11 has a beam barrel 12 and holds a bearing 13, one endoporus 131 of one axle center 14 these bearings 13 of grafting, one shell fragment 14 is arranged in beam barrel 12 and is positioned at the below of bearing 13, conventionally the setting of shell fragment 14 is in order to provide precompression to bearing 13, to guarantee that bearing 13 is in normal operating condition, but coordinate for friction tight mode at the external diameter of the bearing 13 shown in this figure and the beam barrel 12 of pedestal 11, bearing 13 is fixed and cannot be moved by beam barrel 12, so shell fragment 14 cannot provide bearing 13 precompressions.Fig. 2 B shows that the external diameter of this bearing 13 and the beam barrel 12 of this pedestal 11 coordinate for the mode of loose fit in addition, although shell fragment 14 can provide precompression to bearing 13 like this, but when 14 running of axle center, bearing 13 can produce wriggles, between the beam barrel 12 of bearing 13 and pedestal 11, produce friction, after long time running, will cause different sound, and then affect the life-span of whole motor.

So industry still needs positive improvement bearing fixing structure at present, to taking into account, maintain bearing normal operation, and improve the problem that bearing is wriggled.

Summary of the invention

Because the problems referred to above, main purpose of the present invention is to provide a kind of bearing fixing structure that prevents bearing wriggling and bearing is produced to precompression.

Another object of the present invention is to provide a kind of bearing fixing structure that is useful in fan motor and electric motor.

Another object of the present invention is to provide a kind of bearing that makes and does not rub to extend bearing working life with the beam barrel of pedestal, prevents that different sound from producing and extending the motor bearing fixing structure in working life.

For achieving the above object, the invention provides a kind of bearing fixing structure, comprising: a bearing, has an interior ring and an outer shroud, this interior ring defines a brearing bore and pegs graft for an axle center, and this brearing bore coordinates with the mode of this axle center with drive fit (interference fit); One bearing set casing, there is a circular bottom part and define a hollow open-work, one outer rim of this circular bottom part extends to form a sidepiece upward and has one first free end, this circular bottom part and this sidepiece define one first space and hold this bearing, and the outer shroud of this bearing coordinates with the mode of this sidepiece with drive fit (interference fit), and this free end is provided with at least one lug radial outward and protrudes out; One pedestal, has a central siphon and defines a second space and hold this bearing set casing and this bearing, and this central siphon has one second free end and is provided with at least one radially limited part and docks this lug to limit the radial rotating of this bearing set casing; One elastic element, is placed on a bottom of this second space and is positioned at the below of this bearing set casing, to contact the circular bottom part of this bearing set casing; Wherein this bearing set casing is between this central siphon and this bearing, and coordinates with the mode of this central siphon with loose fit (clearance/loose fit).

By the present invention, can prevent bearing radial rotary and bearing is produced to precompression by elastic element in beam barrel, to maintain bearing, run well.

Accompanying drawing explanation

Following graphic object is to make the present invention to be more easily understood, and in encyclopaedizing herein, those are graphic, and makes it form the some of specific embodiment.Specific embodiment by herein with reference to corresponding graphic, in order to do to explain orally in detail specific embodiments of the invention, and in order to set forth the action principle of invention.

Figure 1A is a kind of schematic diagram of known technology;

Figure 1B is the schematic diagram of another kind of known technology;

Fig. 2 A is perspective exploded view of the present invention;

Fig. 2 B is combination cross-sectional schematic of the present invention;

Fig. 3 is the schematic diagram of bearing set casing of the present invention

Fig. 4 is the schematic diagram that bearing of the present invention and bearing set casing are installed in central siphon;

Fig. 5 is the perspective exploded view that the present invention is applied to electric motor;

Fig. 6 is the combination cross-sectional schematic of Fig. 5.

Symbol description

21 axle center

211 catching grooves

22 bearings

221 interior rings

222 outer shrouds

223 brearing bores

224 first sides

225 second sides

23 bearing set casings

231 circular bottom parts

232 hollow open-works

233 sidepieces

234 first free ends

235 lugs

236 first spaces

24 pedestals

241 central siphons

242 second spaces

243 second free ends

244 limited parts radially

25 elastic elements

26 clasps

Embodiment

Hereinafter with reference to correlative type, the better enforcement of the present invention is described, wherein identical element is illustrated the component symbol with identical.

Refer to shown in Fig. 2 A and Fig. 2 B, wherein Fig. 2 A is to be perspective exploded view of the present invention, and Fig. 2 B is that the present invention combines cross-sectional schematic.As shown in Figure 2 A, comprise an axle center 21, a bearing 22, a bearing set casing 23, a pedestal 24, an elastic element 25 and a clasp 26.This bearing 22 has an interior ring 221 and an outer shroud 222, and this interior ring 221 defines a brearing bore 223.

In the lump with reference to shown in figure 3, this bearing set casing 23 has a circular bottom part 231 and defines a hollow open-work 232 for these axle center 21 grafting, the outer rim of this circular bottom part 231 extends to form a sidepiece 233 upward, this sidepiece 233 has one first free end 234, and this circular bottom part 231 and this sidepiece 233 define one first space 236 in order to hold this bearing 22.This first free end 234 defines an open area and is communicated with this first space 236, and be provided with at least one lug 235 radial outward and protrude out (that is protruding out towards the direction of contrary this open area), in dividing of three lugs of this graphic representation, 235 angular distances such as grade, be located at this first free end 234 and protrude out outwardly.

When aforementioned bearings 22 is received into behind this first space 236, one first side 224 of this bearing 22 (as Fig. 2 B shows) is positioned at this open area, and one second side 225 of this bearing (as Fig. 2 B shows) is positioned at this circular bottom part 231.

Get back to shown in Fig. 2 A and Fig. 2 B, this pedestal 24 has a central siphon 241, this central siphon 241 protrudes out vertically upward from the surface of pedestal 24, central siphon 241 is for hollow tubular and define a second space 242 and hold this bearing 22 and bearing set casing 23 and this elastic element 25, and one end that this central siphon 241 protrudes out is one second free end 243,243 pairs of this second free ends should lug 235 position be provided with at least one radially limited part 244, in graphic, be expressed as recess.

This elastic element 25 is placed on these second space 242 bottoms and is positioned at the below of this bearing set casing 23, and then the circular bottom part 231 of this bearing set casing 23 of contact contact, and at this, implementing this elastic element 25 is for example shell fragment or spring, but is not limited to this.

In the lump with reference to shown in figure 4, when this bearing 22 is placed on behind the first space 236 of this bearing set casing 23, this bearing set casing 23 is placed in the second space 242 of this central siphon 241, this bearing set casing 23 is between this bearing 22 and the central siphon 241 of this pedestal 24, and in lug 235 correspondences of the first free end 234, insert the radially limited part 244 of this second free end 243, and then the radial displacement of bearing set casing 23 is limited, namely bearing set casing 23 cannot be at the interior radial rotary of central siphon 241.

Again for another example shown in Fig. 2 A and Fig. 2 B, this axle center 21 is provided with a catching groove 211 and for this clasp 26, buckles solid, this clasp 26 is positioned at the first side 224 of this bearing 22, therefore this bearing 22 and this bearing set casing 23 are between this clasp 26 and this elastic element 25, and clasp 26 is in order to prevent the axial displacement of bearing 22 and bearing set casing 23.

It is worth mentioning that, this axle center 21 coordinates with the mode of this brearing bore 223 with drive fit (interference fit), the outer shroud 222 of this bearing 22 coordinates with the mode of the sidepiece 233 of this bearing set casing 23 with drive fit (interference fit), the generation of wriggling so as to reducing bearing 22, moreover this bearing set casing 23 coordinates with the mode of this central siphon 241 with loose fit (clearance/loose fit), so as to making elastic element 25 produce precompression by 23 pairs of these bearings of this bearing set casing 22, maintain bearing 22 and run well.

For making to better understand application of the present invention, below will lift electric motor as application note, so the present invention also can be used in fan motor.

As shown in Figures 5 and 6, wherein Fig. 5 represents the perspective exploded view of electric motor, and Fig. 6 represents the combination cross-sectional schematic of electric motor.As shown in Figure 5, and in the lump with reference to figure 2A, Fig. 2 B to Fig. 4, aforementioned axis is socketed with a rotor 31 in the heart, this rotor 31 is positioned at the top of clasp 26, another group bearing fixing structure is arranged on the opposite side of rotor, and the element that another group bearing fixing structure comprises is identical with above-mentioned bearing fixing structure so no longer again repeat.In this is graphic, two groups of bearing structures divide the both sides that are located at this rotor, two pedestal 24,24 docking form a housing 30 to hold a stator 32 and this rotor 31 and other aforesaid each elements, these stator 32 intervals to should rotor 31 with excitatory to this rotor 31, and drive this rotor 31 to drive this axle center 21 runnings.

By this axle center 21, coordinate with the mode of this brearing bore 223 with drive fit (interference fit), the outer shroud 222 of this bearing 22 coordinates with the mode of the sidepiece 233 of this bearing set casing 23 with drive fit (interference fit), the generation of wriggling with the bearing 22 reducing in running, moreover this bearing set casing 23 coordinates with the mode of this central siphon 241 with loose fit (clearance/loose fit), to make elastic element 25 produce precompression by the bearing 22 in 23 pairs of runnings of this bearing set casing, maintain bearing 22 and run well.

In sum, the present invention is useful in fan motor and electric motor, in order to prevent that bearing from wriggling and bearing is produced to precompression, makes bearing not rub to extend bearing working life with the beam barrel of pedestal, prevents that different sound from producing and extending motor working life.

Although the present invention discloses as above with mode of execution; so it is not in order to limit the present invention, is anyly familiar with this skill person, without departing from the spirit and scope of the present invention; when being used for a variety of modifications and variations, thus protection scope of the present invention when depending on please the scope of the claims in accompanying the person of determining be as the criterion.

Claims

1. a bearing fixing structure, is characterized in that, comprising:

One bearing, has an interior ring and an outer shroud, and this interior ring defines a brearing bore and pegs graft for an axle center, and this brearing bore coordinates in friction tight mode with this axle center;

One bearing set casing, there is a circular bottom part and define a hollow open-work, one outer rim of this circular bottom part extends to form a sidepiece upward and has one first free end, this circular bottom part and this sidepiece define one first space and hold this bearing, and the outer shroud of this bearing coordinates in friction tight mode with this sidepiece, this first free end is provided with at least one lug radial outward and protrudes out;

One pedestal, has a central siphon and defines a second space and hold this bearing set casing and this bearing, and this central siphon has one second free end and is provided with at least one radially limited part and docks this lug to limit the radial rotating of this bearing set casing;

One elastic element, is placed on a bottom of this second space and is positioned at the below of this bearing set casing, to contact the circular bottom part of this bearing set casing;

Wherein this bearing set casing is between this central siphon and this bearing, and coordinates with the mode of this central siphon with loose fit.

2. bearing fixing structure as claimed in claim 1, it is characterized in that, the first free end of the sidepiece of this bearing set casing defines an open area and is communicated with this first space, and this bearing has, and one first side is positioned at this open area and one second side is positioned at this circular bottom part.

3. bearing fixing structure as claimed in claim 2, is characterized in that, this axle center is provided with a catching groove and buckles admittedly for a clasp, and this clasp is positioned at the first side of this bearing.

4. the bearing fixing structure as described in claim 1 or 3, is characterized in that, this axle center is socketed a rotor.

5. bearing fixing structure as claimed in claim 3, is characterized in that, bearing and this bearing set casing are between this clasp and this elastic element.

6. bearing fixing structure as claimed in claim 1, is characterized in that, this elastic element is shell fragment or spring.