CN204349690U - Low wearing and tearing three brace type motor - Google Patents

Abstract

The utility model relates to a kind of low wearing and tearing three brace type motor, comprise motor body assembly, reducer assemblies and electric component (22), one end of the armature shaft (13) of this motor body assembly is worm screw (23), rolling bearing (18) is housed at the middle part of described armature shaft, in worm screw one end of described armature shaft, worm screw end bearing (11) is housed, sliding bearing (20) is housed in the other end of described armature shaft.Described rolling bearing is fastened in the dead eye of deceleration box (14) of reducer assemblies by convex bearing (ball) cover (19), screw (3).The utility model adds the job stability of armature axle, decreases the vibration because wearing and tearing occur and noise, extends the working life of whole motor; The error that armature shaft manufacture assembling produces can be reduced largely, improve its working condition; The other strength phenomenon of indeterminate generation can not be there is again, greatly improve machine operation quality.

Description

Low wearing and tearing three brace type motor

Technical field

The present invention relates to a kind of motor, particularly relate to a kind of armature shaft support motor.

Background technology

Existing various permanent magnet DC motor, especially the matching used seat motor of vehicle, rain shaving electrical machine, skylight motor and window lifting motor etc., due to the restriction of assembly space, require that it has compact conformation, the feature that weight is slim and graceful.Its common configuration deceleration part that to be motor body part match with worm and helical gear is by together with being linked and packed of casing and deceleration box, and worm screw is processed in one end of the armature shaft of motor body part, is commonly referred to worm screw armature shaft.After electrical power work, this armature shaft rotates, and by worm screw and the rotation of helical gear engagement driven gear assembly of its one end, completes electric energy to mechanical transformation of energy and deceleration.Armature shaft in motor is by three bearings, and middle main support bearing is sliding bearing, and the radial location of armature shaft two ends is also born by the steel ball be pressed into for sliding bearing, its axial location, and its major defect deficiency is:

1, increase number of support points is to three supporting constructions while raising armature shaft rigidity, also makes two original support static determinacy axles become the indeterminate axle of three supports.The constraint increased in former statically determinate system due to redundant structure causes adding multiple unknown constraint power, simultaneously owing to manufacturing the existence of rigging error, easily cause the armature shaft being in indeterminate state after completing assembling, there is other strength phenomenon, the stressing conditions of armature shaft is worsened, badly influences the overall work life-span of motor.

2, middle main support adopts sliding bearing for powder metallurgy, easily occurs more serious wearing and tearing in the course of work.After this sliding bearing abrasion, the gap of armature shaft and sliding bearing increases, and causes motor to occur serious vibration occurs, increases operating noise.Gap increases the worm screw and helical gear engagement situation that also can worsen armature shaft further, causes this engagement failure mode time serious, and whole motor stops normal work.

3, the radial location of armature shaft two ends is also plain bearing, and be easier to wearing and tearing occur and affect the normal work of motor, it defines indeterminate restraining structure with middle spring bearing.Its axial location adopts steel ball structure, and the rising of machine operation temperature can cause armature shaft to extend, thus withstands the steel ball of its two ends axial location, increases operating friction, reduces motor-driven efficiency.Meanwhile, the change of the end play of armature shaft can reduce the Meshing stability of worm and helical gear, increases operating noise and vibration.

Summary of the invention

The object of the invention is to overcome above-mentioned deficiency, and a kind of low wearing and tearing three brace type motor is provided, be intended to the other strength phenomenon eliminated because redundant structure produces and reduce the wearing and tearing and gearing friction power that produce in armature shaft work.

The present invention realizes by following technical solution: low wearing and tearing three brace type motor, comprise motor body assembly, reducer assemblies and electric component, this motor body assembly comprises commutator, armature winding, armature core, magnetic shoe, casing, armature shaft, and an end of this armature shaft is worm screw; This reducer assemblies comprises gear box cover, deceleration box, helical gear, at the middle part of described armature shaft, rolling bearing is housed, and in worm screw one end of described armature shaft, worm screw end bearing is housed, in the other end of described armature shaft, sliding bearing is housed.

After adopting the present invention, the middle part main support effect of armature shaft is born by rolling bearing, adds the job stability of armature shaft, decreases the vibration because wearing and tearing occur and noise, extends the working life of whole motor.Armature shaft rear end adopts (powder metallurgy spherical) sliding bearing can reduce the error of armature shaft manufacture assembling generation largely, improves its working condition.Armature shaft worm screw one end adopts self-adapting type support structure structure (comprising worm screw end bearing, sealing ring and filler gum) design, the assembling of intermediate bearing and rear end sliding bearing is first completed during assembling, make the indeterminate axle of three supports first change two support static determinacy axles into, in this self-adapting type structure, then use filler gum (moment binder) to make its rapid solidification form three supporting mechanisms again.Adopt the armature shaft of this structure and flow process after completing assembling, the other strength phenomenon of indeterminate generation can not occur again, greatly improve machine operation quality.

Accompanying drawing explanation

Below in conjunction with accompanying drawing and execution mode, the present invention is described in further detail.

Fig. 1 is mounting structure schematic diagram of the present invention.

Fig. 2 is the scheme of installation of the rolling bearing in Fig. 1 in the middle part of armature shaft.

Fig. 3 is the installation diagram of armature shaft rear end in Fig. 1 (powder metallurgy spherical) sliding bearing.

Fig. 4 is the scheme of installation of the self-adaptation type supporting construction of armature shaft worm screw end in Fig. 1.

Embodiment

Known referring to figs. 1 through Fig. 4, the present invention's low wearing and tearing three brace type motor, comprise motor body assembly, reducer assemblies and electric component 22, this motor body assembly comprises commutator 4 (i.e. commutator, and carbon brush), armature winding 5, armature core 6 (rotor), magnetic shoe 7 (stator), casing 8, armature shaft 13, an end of this armature shaft 13 is worm screw 23 (being meshed with the helical gear 2 of reducer assemblies); This reducer assemblies comprises gear box cover 1, deceleration box 14, helical gear 2, at the middle part of described armature shaft 13, rolling bearing 18 is housed, in worm screw one end (i.e. front end) of described armature shaft 13, worm screw end bearing 11 is housed, in the other end (i.e. rear end) of described armature shaft 13, (powder metallurgy spherical) sliding bearing 20 is housed.Its casing 8 and deceleration box 14 cooperation tighten together; Magnetic shoe 7 (two pieces) is symmetrical fastening to be pasted onto on casing 8 inwall.

Worm screw end supported hole 10 is arranged with at the outer of described worm screw end bearing 11, at the end of this worm screw end supported hole 10 (its arrival end is provided with glue filling opening 9), sealing ring 12 (it is near worm screw end bearing 11) is housed, in this worm screw end supported hole 10, be full of filler gum 21 (and being sealed by sealing ring), described worm screw end bearing 11, worm screw end supported hole 10, filler gum 21, sealing ring 12 form the worm screw end self-adaptation type supporting construction of armature shaft.Wherein, worm screw end supported hole 10, sealing ring 12 are all between the deceleration box 14 of motor reducer assembly and worm screw end bearing 11.

As depicted in figs. 1 and 2, described rolling bearing 18 is fastened in the dead eye of deceleration box 14 of reducer assemblies by convex bearing (ball) cover 19, screw 3.Described armature shaft 13 is being equipped with expanding ring 15, open washer 17 respectively separately near the front portion place of rolling bearing 18, rear portion place.On described armature shaft 13 and between rolling bearing 18 and open washer 17, the saucer washer 16 (two pieces, and suitably compression) back to arranging is equipped with at place.This saucer washer 16, rolling bearing 18 are contained on armature shaft 13, as the intermediate support of armature shaft 13, its axial location is located by expanding ring 15, open washer 17 respectively, its object is to eliminate its fit-up gap, when to avoid in the course of work armature bearing by axial force, the collision that rolling bearing produces with expanding ring, open washer due to fit-up gap and vibration.Thus the axial location of armature shaft is concentrated on the parts such as rolling bearing, expanding ring, saucer washer, open washer, and many drawbacks that the two ends eliminating armature shaft adopt steel ball location to produce.

As shown in figures 1 and 3, the support of armature shaft 13 rear end have employed powder metallurgy spherical sliding bearing 20, because this structure can compensate a certain amount of angle of assembling error, so the error of armature shaft manufacture assembling generation can be reduced largely, improve its working condition.

As shown in Figure 1 and Figure 4, worm screw between deceleration box 14 and worm screw end bearing 11 holds supported hole 10 built with filler gum (being moment binder), and at the end in described worm screw end bearing hole 10, (" O " type rubber) sealing ring 12 is housed, filler gum can not be flow to outside worm screw end supported hole 10 between erecting stage.In Fig. 1, length A represents the centre-to-centre spacing value of the worm screw end of helical gear and armature shaft, in Fig. 1, two director's degree B represent the air gap value between two place's magnetic shoes and armature core, according to the technical requirement of motor assembly assembling, in assembling process, the distance tolerance at demand fulfillment A place is equal with the air gap value at guarantee two B places.Therefore on electric machine structure, the intermediate support body of armature shaft adopts the parts such as rolling bearing, armature shaft rear end adopts powder metallurgy spherical sliding bearing 20, and its worm screw end supports and then have employed self-adapting type support structure structure, avoids the indeterminate other strength phenomenon that three supporting constructions because of armature shaft cause.

As shown in Figure 1 and Figure 4, armature shaft is first after the intermediate supports of the parts such as rolling bearing and the rear end supporting and location of powder metallurgy spherical sliding bearing, because manufacture and rigging error can cause the worm end of armature shaft to divide and worm screw end supported hole generation decentraction (show that the axis of armature shaft 13 and the axis of worm screw end supported hole 10 do not overlap, the upper and lower distance between worm screw end bearing 11 with deceleration box 14 is not identical).Follow-up assembling should follow following operating sequence: be placed on by the motor completing above-mentioned operation on special fixture, and armature shaft worm screw is held upward, and in vertical position.Then, filler gum (instant adhesive) is instilled from glue filling opening 9, instant adhesive fills up the space at place, worm screw end bearing hole 10 immediately, and rapid solidification is permanent fixing, owing to being equipped with sealing ring 12, instant adhesive can not flow out outside worm screw end bearing hole, and three supporting static indeterminacy armature shafts now after mounting other strength interference can not occur again.

Claims (4)

1. low wearing and tearing three brace type motor, comprise motor body assembly, reducer assemblies and electric component (22), this motor body assembly comprises commutator (4), armature winding (5), armature core (6), magnetic shoe (7), casing (8), armature shaft (13), and an end of this armature shaft (13) is worm screw (23); This reducer assemblies comprises gear box cover (1), deceleration box (14), helical gear (2), it is characterized in that: at the middle part of described armature shaft (13), rolling bearing (18) is housed, in worm screw (23) one end of described armature shaft (13), worm screw end bearing (11) is housed, in the other end of described armature shaft (13), sliding bearing (20) is housed.

2. low wearing and tearing three brace type motor as claimed in claim 1, it is characterized in that: be arranged with worm screw end supported hole (10) at the outer of described worm screw end bearing (11), at the end of this worm screw end supported hole (10), sealing ring (12) is housed, filler gum (21) is full of, the worm screw end self-adaptation type supporting construction of described worm screw end bearing (11), worm screw end supported hole (10), filler gum (21), sealing ring (12) formation armature shaft in this worm screw end supported hole (10).

3. low wearing and tearing three brace type motor as claimed in claim 1, is characterized in that: upper and near the front portion place of rolling bearing (18), rear portion place, expanding ring (15), open washer (17) are being housed respectively separately at described armature shaft (13); On described armature shaft (13) and between rolling bearing (18) and open washer (17), the saucer washer (16) back to arranging is equipped with at place.

4. low wearing and tearing three brace type motor as claimed in claim 1, is characterized in that: described rolling bearing (18) is fastened in the dead eye of deceleration box (14) of reducer assemblies by convex bearing (ball) cover (19), screw (3).