CN2379964Y

CN2379964Y - Thin type electric motor

Info

Publication number: CN2379964Y
Application number: CN 99211980
Authority: CN
Inventors: 黄文喜; 林国正; 黄裕鸿
Original assignee: Delta Electronics Inc
Current assignee: Delta Electronics Inc
Priority date: 1999-06-03
Filing date: 1999-06-03
Publication date: 2000-05-24
Anticipated expiration: 2009-06-03

Abstract

The utility model relates to a thin type electric motor, which comprises a base having at least two fanning strips and a lower step part, at least one bearing contained in the fanning strips, a main shaft which rotates by the load bearing of the bearing and has an annular groove, and a hollow coil seat used for sheathed with the fanning strips tightly, wherein, the coil seat comprises a plurality of fastening parts used for being fastened with the lower step part fixedly, an upper step part used for pressing against the bearing, and an elastic ring used for sheathed in the annular groove of the main shaft; the bearing is fixedly by the elastic ring, the lower step part and the upper step part together. The thin type electric motor can adsorb vibration and noise generated by assembled tolerance and can operate smoothly. The thickness of the thin type electric motor is small.

Description

Slim motor

The utility model relates to a kind of motor, particularly a kind of slim motor that is applicable to fan.

In the present employed fan, motor is a pith.For adapting to the slimming of cooling system (for example institute generally the notebook computer of use) now, must dwindle the thickness of fan.Dwindle the thickness of fan, at first need to dwindle the thickness of motor.

Bearing is an important member in the motor, must suitably locate to keep its normal operation bearing, the localization method of bearing has a variety of, for example United States Patent (USP) 5,343, among Fig. 2 of No. 104, both come bearing 10 location with the end difference 9 of bearing groove 8 and anti-thrust plate 33, wherein, anti-thrust plate 33 must be pressed by arrester(-tor) 34 and main shaft 14 again and be cooperated and be fixed, and, shown in Figure 8 as above-mentioned patent, bearing groove 8 must be by members such as U type groove 27, protuberance 31, the conical surfaces 25 and is fixed on the stator 17.Because the more and complex structure of its number of components adopts this structure to be difficult to dwindle the thickness of motor.

Below will another kind of bearing locate mode be described with a kind of existing fan motor.

As shown in Figure 1, the generalized section of its a kind of known fan motor, wherein, fan motor comprises: a pedestal 101; One bearing pedestal 102 is fixed in the central part of pedestal 101, has an end difference 102a; Two bearings 103 and 104, in the bearing pedestal 102 of packing into from the top down respectively, and the middle of two bearings 103 and 104 is situated between every work end difference 102a; One main shaft 105 which is provided with an annular recess 105a; One impeller portion 108 is fixed on the main shaft 105, with rotation, has a 108a of hub portion and several blades 108b; One coil holder 106 has the 106a of silicon steel sheet portion, insulation division 106b, coil portion 106c and clamping part 106d; One circuit board 107 is fixed on the pedestal 101, and fixes with the clamping part 106d snapping of coil holder 106; And a spring 109 and a C shape clasp 110.

As shown in Figure 1, for bearing 103 and 104 is positioned, be provided with a spring 109 in bearing 104 upper ends, bearing 103 lower ends are provided with a C type clasp 110.The two ends of spring 109 contact with the 108a of hub portion with bearing 104 respectively.By the acting in conjunction of spring 109, can position bearing 104 with end difference 102a.On the other hand, C type clasp 110 is embedded in the annular recess 105a on the main shaft 105.By the elastic force of spring 109, add the acting in conjunction of C type clasp 110 and end difference 102a, can position bearing 103.

The shortcoming of this existing fan is described below with reference to Fig. 1.In Fig. 1, bearing pedestal 102 is fixed on the pedestal 101, and coil holder 106 can be fixed in the periphery of bearing pedestal 102 by a glue.To the positioning function of bearing 103 and 104, be to provide jointly by bearing pedestal 102, spring 109 and C type clasp 110 threes.The vibration that motor operation produced because all being close to bearing 103 and 104, bearing pedestal 102 is rigid state, so when there is the assembling tolerance in both (clearance is particularly arranged), can not be absorbed effectively.And bearing pedestal 102 must contact with bearing 103 and 104, pedestal 101 and coil holder 106 simultaneously simultaneously.Because the number of components that cooperatively interacts is more, must more strictly guarantee the dimensional tolerance of each member, and make assembling process more complicated.

Moreover the main function of spring 109 and C type clasp 110 is for to impose fixing strength to bearing 103 and 104, if can be with the function of a component composition this two, removes and can make production and assembling process more the facility, more can make the ultrathin motor of manufacturing become possibility.

A purpose of the present utility model is to provide a kind of and absorbs because assembling noise and vibration and the little slim motor of thickness that tolerance produced.

For achieving the above object, the utility model is taked following measure:

Slim motor of the present utility model comprises:

One pedestal has at least two fanning strips and end difference once;

At least one bearing is contained within the fanning strip;

One main shaft is subjected to the carrying of bearing and rotates, and has an annular recess;

The coil holder of one hollow form, in order to entangle fanning strip, coil holder comprises: clamping part is used for being fixed with downstairs portion;

One in order to push down the last end difference of bearing;

One elastic ring is in order to be inserted in annular recess;

By elastic ring, downstairs portion and last end difference rigid bearing.

Wherein, described elastic ring can be an O type ring or a helical spring.

The accompanying drawing simple declaration:

Fig. 1: a kind of profile of existing fan motor.

Fig. 2: the front view of the utility model fan motor preferred embodiment.

Fig. 3: the part drawing of fan motor shown in Figure 2.

Fig. 4: along the cutaway view of Fig. 2 midship section L-L.

Reaching embodiment in conjunction with the accompanying drawings is described in detail as follows architectural feature of the present utility model:

As shown in Figure 3, motor of the present utility model comprises that the coil holder 206, of a pedestal 201, a bearing 203, a hollow form has the main shaft 205 of annular recess 205a, an impeller portion 208 and an O type ring 211.Pedestal 201 has four root 201a, once end difference 201b and two fanning strip 201c.As shown in Figure 4, coil holder 206 has end difference 206e on a 206a of silicon steel sheet portion, an insulation division 206b, a coil portion 206c, the clamping part 206d and.Impeller portion 208 comprises a 208a of hub portion and several blades 208b.

It is to be noted: two breach in the middle of (one) the two fanning strip 201c are for the space of clamping part 206d as the engaging downstairs 201b of portion; (2) because the hatching L-L of Fig. 2 passes through above-mentioned two breach, so in Fig. 4, there is no the part that demonstrates two fanning strip 201c.

Aspect assembling, see also Fig. 3, at first, bearing 203 is packed in the two fanning strip 201c of pedestal 201, and coil holder 206 entangles two fanning strip 201c again, and is fixed with clamping part 206d and the 201b of downstairs portion.Then, after main shaft 205 is fixed with impeller portion 208, connect the centre bore of bearing 203 again, O type ring 211 then entangles the annular recess 205a of main shaft 205.

Fixed form below in conjunction with description of drawings bearing 203.As shown in Figure 4, bearing 203 is packed into after the coil holder 206, but the 201b of downstairs portion spring bearing 203, that is, impose top strength on one.After coil holder 206 entangled fanning strip 201c, last end difference 206e can impose amount of pressure to bearing 203.After O type ring 211 was installed, O type ring 211 can impose top strength on another to bearing 203.And after whole fan motor mounting was intact, the 208a of hub portion of impeller portion 208 can impose another to bearing 203 again and press down strength therefore.Therefore, bearing 203 axially is being subjected to suitable fixing.And the periphery of bearing 203 is being fixed by two fanning strip 201c.

See also Fig. 3, because fanning strip 201c has elastic dilatation outward and the key character that inwardly shrinks, thus can be in order to rigid bearing 203 flexibly, and flexibly be fixed within the coil holder 206.Specifically, under the situation of two fanning strip 201c that bearing 203 is packed into, if the external diameter of bearing 203 is slightly larger than the formed internal diameter of two fanning strip 201c, then two fanning strip 201c can slightly expand outwardly in order to bearing 203 and enter, and rigid bearing 203 firmly.On the other hand, coil holder 206 is being entangled under the situation of two fanning strip 201c, the character that contracts in the elasticity of two fanning strip 201c can more effectively absorb the tolerance in the manufacturing.

Fix more firmly in order to make bearing 203, the internal diameter of two formed circular scope of fanning strip 201c can be designed to be slightly less than the external diameter of bearing 203, and the external diameter of the formed circular scope of fanning strip 201c is designed to be slightly larger than the internal diameter of desiring to entangle fanning strip 201c part on coil holder 206.Under ideal state, can produce the member that meets above-mentioned dimensional requirement, can not produce the gap in the assembling and cause vibration in the motor operation thereby make.

Compared with prior art, the utlity model has following effect:

Slim motor of the present utility model can absorb because assembling noise and vibration and thickness that tolerance produced is little; In use, because the vibration that manufacturing tolerance produced can most of be sponged by O type ring, therefore, can make the running of whole wind fan motor more smooth-going.

The specific embodiment that is proposed in above-mentioned detailed description is only in order to be easy to illustrate technology contents of the present utility model, and be not with the utility model narrow sense be limited to the foregoing description, under the situation that does not exceed design of the present utility model, can make many variations.For example, the number of fanning strip 201c is not limited to two in the above-described embodiments, and it also is feasible adopting the fanning strip 201c more than three.Moreover the utility model is not limited to the situation of a bearing, also can use plural bearing, as long as the 201b of downstairs portion is up moved on the sidewall of fanning strip 201c, and another place that clamping part 206d is snapped in pedestal 201 is got final product.Though the utility model all realizes locating effect with absorbing with O type ring, uses all the other rubber-like elastic rings also can.

Claims

1, a kind of slim motor comprises:

One pedestal has at least two fanning strips and end difference once;

At least one bearing is contained within the fanning strip;

It is characterized in that, also comprise:

One in order to push down the last end difference of bearing;

One elastic ring is in order to be inserted in annular recess;

By elastic ring, downstairs portion and last end difference rigid bearing.

2, motor according to claim 1 is characterized in that, described elastic ring is an O type ring.

3, motor according to claim 1 is characterized in that, described elastic ring is a helical spring.