CN206948168U - Motor bearings axiality structure - Google Patents

Abstract

A kind of motor bearings axiality structure, including stator, rotor, upper bearing (metal) and lower bearing, upper bearing (metal) and lower bearing are enclosed in the rotating shaft of rotor, wherein, stator is integrated injection molding structure, and its inner chamber offers the consistent upper bearing (metal) groove and lower bearing groove of axiality respectively up and down, and lower bearing is in lower bearing groove, for upper bearing (metal) in the upper bearing (metal) groove, upper bearing (metal) is that iron is copper-based or blue or green copper based powder metallurgy material suppresses integrated formed structure.The utility model is by stator integrated injection molding, and open up the consistent upper and lower bearing groove of axiality respectively up and down in the inner chamber of stator, in other words, the utility model eliminates accumulation coaxiality error during upper and lower bearing assembling, therefore, after upper and lower bearing is respectively charged into upper and lower bearing groove, the axiality uniformity of upper and lower bearing has been effectively ensured.

Description

Motor bearings axiality structure

Technical field

Stepper motor field is the utility model is related to, is especially a kind of motor bearings axiality structure.

Background technology

The rotor of stepper motor (such as p-m step motor) is generally all to rely on upper and lower two bearings, and go up, One of an important factor for axiality of lower two bearings is then influence motor quality.It is if coaxial between upper and lower two bearings There is deviation in degree, then the rotor and stator for just easily causing motor produce friction or stuck phenomenon, so as to influence rotor Normal operation.

At present, the lower bearing of big plurality of stepping motors is all assembled on stator, and upper bearing (metal) is riveted on the installation panel of motor On, and installation panel rivets with upper and lower casing, upper and lower casing again with motor stator is cylindrical combines.As can be seen here, Such multiple tracks installation procedure, the upper and lower coaxial bearing degree uniformity after assembling will be caused to be difficult to ensure that this directly affects motor Quality.

Utility model content

The technical problems to be solved in the utility model is to provide a kind of motor bearings axiality structure, its can ensure it is upper, The axiality of lower bearing is consistent.

Technical solution of the present utility model is to provide a kind of motor bearings axiality structure with following structure, Including stator, rotor, upper bearing (metal) and lower bearing, upper bearing (metal) and lower bearing are enclosed in the rotating shaft of rotor, wherein, stator is integrated Injection molding structure, its inner chamber offers the consistent upper bearing (metal) groove of axiality respectively up and down and lower bearing groove, lower bearing are mounted in down In bearing groove, upper bearing (metal) is in upper bearing (metal) groove.

Motor bearings axiality structure described in the utility model, wherein, upper bearing (metal) is that iron is copper-based or bronze based powders smelting Golden material suppresses integrated formed structure.

Motor bearings axiality structure described in the utility model, wherein, upper bearing (metal) includes bearing portions and the support of bearing, Bearing portions and support of bearing integrated injection molding, and moulding is formed therebetween.

After above structure, compared with prior art, the utility model motor bearings axiality structure has following excellent Point：Because the utility model is by stator integrated injection molding, and open up respectively up and down in the inner chamber of stator axiality it is consistent it is upper, Lower bearing groove, in other words, the utility model eliminate the accumulation coaxiality error during assembling of upper and lower bearing, therefore, when it is upper, After lower bearing is respectively charged into upper and lower bearing groove, the axiality uniformity of upper and lower bearing has been effectively ensured.

In addition, the utility model has further the advantage that：

1st, the life-span is longer：Upper bearing (metal) uses integral structure (powder metallurgy pressing is integrally formed or injection molding), this Compared with assembly type upper bearing (metal), reduce assembly process, be advantageous to reduce error, ensure that axiality requirement.In addition, also increase The oil content of bearing, improve bearing, the service life of motor；

2nd, good product consistency：Upper bearing (metal), lower bearing, stator are all mould one-shot formings, ensure that the stability of product. Machined part is not used, avoids the unstability of machined part size, is effectively improved the stuck of motor, abnormal sound etc. Problem；

3rd, technique is simple：The utility model direct-assembling, it is not necessary to which axiality is corrected by frock.

Brief description of the drawings

Fig. 1 is the cross section structure diagram of the utility model motor bearings axiality structure；

Fig. 2 is the main structure diagram of upper bearing (metal) in the utility model motor bearings axiality structure；

Fig. 3 is another structural representation of upper bearing (metal).

Embodiment

The utility model motor bearings axiality structure is made with reference to the accompanying drawings and detailed description further detailed Explanation：

As shown in figure 1, in this embodiment, the utility model motor bearings axiality structure includes stator 4, turned Son 6, upper bearing (metal) 2, lower bearing 7, panel 1, upper casing 3 and lower casing 5, upper bearing (metal) 2 and lower bearing 7 are enclosed on the rotating shaft of rotor 6 On, stator 4 is integrated injection molding structure, and the inner chamber of stator 4 offers the consistent upper bearing (metal) groove of axiality with respectively up and down Bearing groove, by the integrated injection molding of stator 4, it ensure that the axiality uniformity of upper bearing (metal) groove and lower bearing groove, lower bearing 7 In lower bearing groove, upper bearing (metal) 2 is in upper bearing (metal) groove.

During installation, first lower bearing 7 is arranged in lower bearing groove, then rotor 6 again will by the location and installation of lower bearing 7 Upper bearing (metal) 2 is arranged in upper bearing (metal) groove, so as to ensure that the axiality of upper and lower bearing without deviation, finally by panel 1, upper casing 3rd, lower casing 5 installs.

Referring to Fig. 2, upper bearing (metal) 2 is that iron is copper-based or blue or green copper based powder metallurgy material suppresses integrated formed structure, this upper axle 2 integral structure is held, reduces assembly process, so as to reduce the probability of error, ensure that the axiality requirement of upper and lower bearing.

If the size of upper bearing (metal) 2 is larger, upper bearing (metal) 2 can also use other structures, structure as shown in Figure 3, upper bearing (metal) 2 Including bearing portions 23 and the support of bearing 21, bearing portions 23 and the integrated injection molding of the support of bearing 21, bearing portions 23 with Moulding 22 is formed between the support of bearing 21, moulding 22 is connecting bearing portions 23 and the support of bearing 21, this upper bearing (metal) 2 Integral structure compared with assembly type bearing, reduce assembly process, be advantageous to reduce error, ensure that upper and lower bearing Axiality requirement.

Embodiment described above is only that preferred embodiment of the present utility model is described, not to this practicality New scope is defined, and on the premise of the utility model design spirit is not departed from, those of ordinary skill in the art are to this The various modifications and improvement that the technical scheme of utility model is made, all should fall into the scope of protection of the utility model.

Claims (3)

1. a kind of motor bearings axiality structure, including stator (4), rotor (6), upper bearing (metal) (2) and lower bearing (7), it is described on Bearing (2) and lower bearing (7) are enclosed in the rotating shaft of rotor (6), it is characterised in that：The stator (4) is integrated injection molding Structure, its inner chamber offer the consistent upper bearing (metal) groove and lower bearing groove of axiality respectively up and down, and the lower bearing (7) is mounted in lower axle Hold in groove, the upper bearing (metal) (2) is in upper bearing (metal) groove.

2. motor bearings axiality structure according to claim 1, it is characterised in that：The upper bearing (metal) (2) is that iron is copper-based Or blue or green copper based powder metallurgy material compacting integrated formed structure.

3. motor bearings axiality structure according to claim 1, it is characterised in that：The upper bearing (metal) (2) includes bearing Partly (23) and the support of bearing (21), the bearing portions (23) and the support of bearing (21) integrated injection molding, and at both Between formed moulding (22).