CN2376130Y

CN2376130Y - Motor

Info

Publication number: CN2376130Y
Application number: CN 99209767
Authority: CN
Inventors: 黄文喜; 林国正; 黄裕鸿
Original assignee: Delta Electronics Inc
Current assignee: Taida Electronic Industry Co Ltd; Delta Electronics Inc
Priority date: 1999-05-14
Filing date: 1999-05-14
Publication date: 2000-04-26
Anticipated expiration: 2009-05-14

Abstract

The utility model relates to a motor, which comprises a main shaft with an annular groove, a hub part fixed on the main shaft, a convex part connected with the inner edge of the lower side of the center of the hub part, at least two bearings used for bearing the main shaft, a bearing seat used for containing at least two bearings, and an elastic ring used for being sheathed in the annular groove, wherein, the bearing seat has at least one step part arranged between each two adjacent bearings of at least two bearings; the bearings are elastically fixed by the combined action of the elastic ring, the step part of the bearing seat, and the convex part of the hub part. The motor has the functions of repressing and fixing the bearings and absorbing shock.

Description

Motor

The utility model relates to a kind of motor, particularly a kind of motor with small size bearing prepressing device and shock absorbing device.

In the present employed electric fan, motor is a part and parcel.Owing to the slimming of cooling system, must dwindle the thickness of fan, promptly must dwindle the thickness of motor.

Bearing is an important component in the motor.The people who has the knack of technology should understand, and must impose precompressed to keep its regular event to bearing.The method of bearing prepressing force has a variety of, and for example U.S. Patent bulletin 5,343, in 104, comes bearing is imposed precompressed with the end difference and the anti-thrust plate of sleeve, and wherein, anti-thrust plate must be pressed with main shaft again and be cooperated.Because its number of components is more, the difficult thickness that dwindles fan.

Below will another kind of bearing prepressing force mode be described with a kind of fan motor commonly used on the market.

Fig. 1 is a kind of profile of commonly using fan motor.This 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 is packed in bearing pedestal 102 respectively from the top down, and the middle of two

bearings

103 and 104 is situated between across end difference 102a; One main shaft 105 has 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 type ring 110.

As shown in Figure 1, for

bearing

103 and 104 is imposed precompressed strength, be provided with a spring 109 in bearing 104 upper ends, bearing 103 lower ends are provided with a C type ring 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 impose precompressed to bearing 104 with end difference 102a.On the other hand, the annular recess 105a on the C type ring 110 embedding main shafts 105.By the elastic force of spring 109, add the acting in conjunction of upper C shape ring 110 and end difference 102a, can fix and impose precompressed to bearing 103.

As shown in Figure 2, it is the bearing 103 of Fig. 1 and 104 stressed from view.Referring to Fig. 1 and 2, directed force F 1 is provided by spring 109 with F2, and directed force F 3, F4, F5 and F6 are provided by end difference 102a, and directed force F 7 is provided by C type ring 110 with F8.So directed force F 1-F4 can do precompressed to bearing 104, and directed force F 5-F8 can do precompressed to bearing 103.

The shortcoming of this known 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.Bearing

103 and 104 is imposed the function of precompressed and location, is to be provided jointly by bearing pedestal 102, spring 109 and C type ring 110 threes.Because bearing pedestal 102 all is close to the rigidity material with bearing 103,104, so when both have the assembling tolerance (the particularly situation of clearance cooperation), the vibration that motor operation produced can not be absorbed effectively.

Moreover the main function of spring 109 and C type ring 110 is for imposing precompressed and fixing 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 makes to produce ultrathin motor and become possibility.

The motor that provides a kind of thickness little is provided the purpose of this utility model, and it can reduce number of components under the situation that does not reduce original function, preferable shock attenuation result can be provided.

For the utility model that achieves the above object is taked following measure:

Of the present utility model 1, a kind of motor comprise:

One main shaft has an annular recess;

One hub portion is fixed on the main shaft;

One bearing pedestal in order to hold bearing, has an end difference;

It is characterized in that, also comprise:

One bearing is in order to the carrying main shaft, to rotate;

One elastic ring, in order to being inserted in annular recess, and with the protuberance acting in conjunction of the end difference of bearing pedestal and hub portion and flexibly fix described bearing.

2, motor according to claim 1 is characterized in that, described hub portion has a protuberance, is located at the inner edge of hub portion center downside;

Comprise at least two bearings;

Bearing pedestal, in order to hold two bearings, bearing pedestal has at least one end difference, and end difference is between the two adjacent between two bearings at least;

Described elastic ring, and fixing two bearings with the protuberance acting in conjunction of at least one end difference of described bearing pedestal and hub portion and flexibly.

Wherein, described elastic ring can be O shape ring.

Wherein, described elastic ring can be a helical spring.

The accompanying drawing simple declaration:

Fig. 1 is a kind of profile of commonly using fan motor.

Fig. 2 is Fig. 1 middle (center) bearing 103 and 104 stressed view.

Fig. 3 is the cutaway view of the utility model fan motor first embodiment.

Fig. 4 is the cutaway view of the utility model thin fan motor second embodiment.

Reach in conjunction with the accompanying drawings embodiment to the utility model fan motor and architectural feature is described as follows:

As shown in Figure 3, first embodiment, fan motor comprises: a pedestal 1; One bearing pedestal 2 is fixed in the central part of pedestal 1, has an end difference 2a; Two bearings 3 and 4, in the bearing pedestal 2 of packing into from the top down respectively, two bearings 3 and 4 in the middle of be situated between every end difference 2a; One main shaft 5 has an annular recess 5a; Main shaft 5 is fixed in rotation in one impeller portion 8, has a 8a of hub portion, several blade 8b and a protuberance 8c; One coil holder 6 has the 6a of silicon steel sheet portion, insulation division 6b, coil portion 6c and clamping part 6d; One circuit board 7 is fixed on the pedestal 1, and fixes with the clamping part 6d snapping of coil holder 6; And an O type ring 11, be embedded among the annular recess 5a.

Comparison diagram 3 and Fig. 1 can find of the present utility model being characterised in that: the spring 109 and C type ring 110 that replace Fig. 1 with an O type ring 11.O type ring 11 is inserted in the annular recess 5a of main shaft 5 and with bearing 3 and contacts.Utilize the elastic force that O type ring 11 had (in contract power), can impose the thrust amount bearing 3.By lower end inner edge protuberance 8c is set, can imposes bearing 4 and press down strength in 8a central authorities of hub portion.So, cooperate the acting in conjunction of protuberance 8c, end difference 2a and O type ring 11, can impose precompression to bearing 3 and 4.Bearing 3 is identical with the situation and the known techniques of 4 suffered precompressions, its explanation of Therefore, omited.

As mentioned above,, can reduce the number of member by the spring 109 of O type ring 11 combination known techniques and the function of C type ring 110, thus can be to the fan motor slimming.Below will second embodiment of the present utility model be described with a kind of thin fan motor.

Second embodiment, as shown in Figure 4, it is the schematic diagram of the thin fan motor of the utility model second embodiment.Referring to Fig. 4, fan motor comprises: a pedestal 1; One bearing pedestal 2 is fixed in the central part of pedestal 1, has an end difference 2a; One bearing 3 is in the bearing pedestal 2 of packing into; One main shaft 5 has an annular recess 5a; Main shaft 5 is fixed in rotation in one impeller portion 8, has a 8a of hub portion, several blades 8b and a protuberance 8c; One coil holder 6 has the 6a of silicon steel sheet portion, insulation division 6b, coil portion 6c and clamping part 6d; One circuit board 7 is fixed on the pedestal 1, and fixes with the clamping part 6d snapping of coil holder 6; And an O type ring 11, be inserted in annular recess 5a, and contact with bearing 3.Comparison diagram 3 and Fig. 4, can learn that characteristics of the present utility model are: fan motor only uses a bearing 3, to carry rotatable main shaft 5.For fixing to bearing 3, the lower end inner edge is provided with a protuberance 8c in the 8a of hub portion central authorities.By the acting in conjunction of protuberance 8c and end difference 2a, can impose precompressed to bearing 3.Because 8a, bearing 3 are with end difference 2a and are close to the rigidity material, so when protuberance 8c can't contact with bearing 3 simultaneously with end difference 2a, promptly can't rigid bearing.In the case, must be by O type ring 11 assisting end difference 2a fan attachment motor, and by O type ring 11 to absorb the vibration that fan motor was produced.Therefore, bearing 3, bearing pedestal 2 and the 8a of the hub portion tolerance on making does not just need very strict, thereby can reduce production costs.

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

In sum, in above-mentioned two embodiment, O type ring 11 more can provide vibration-absorbing function except imposing the precompressed bearing.Because of gapped, when whole motor produced vibration, O type ring can provide vibration-absorbing function when between bearing and bearing pedestal.

The specific embodiment that is proposed in the detailed description of preferred embodiment is only in order to be easy to illustrate technology contents of the present utility model, and it is limited.Under the prerequisite that does not exceed design of the present utility model, can make many variations and implement.

For example, in first embodiment,, use plural bearing also should be all right in response to long main shaft though only use two bearings.Moreover, among second embodiment,, this protuberance is moved to the interior outer rim at hub portion center though the protuberance of hub portion is the inner edge near hub portion center, or the interior outer rim of while at hub portion center all to be provided with protuberance also be feasible mode.Though the utility model all reaches the function of precompressed or absorbing with O type ring, use all the other rubber-like elastic rings also can.Motor of the present utility model is not limited to fan motor, and is also available to the motor of other products.

Claims

1, a kind of motor comprises: