CN208508687U - Rotor axial direction location structure and rain shaving electrical machine - Google Patents

Abstract

The utility model discloses a kind of rotor axial direction location structure and rain shaving electrical machines, are related to motor device field, solve existing armature shaft anti-shifting structure elimination gap and Anti-moving acts on limited, consistency and is difficult to ensure；Rotor unbalancing value is bigger than normal；The short problem of the service life of rolling bearing.The technical solution adopted in the utility model is: rotor axial direction location structure, including armature shaft, one end of armature shaft is for the worm screw with worm gear, card collar groove is respectively set in the end and middle part of the other end of armature shaft, assembly first clamps retainer ring in the card collar groove of end, and assembly second clamps retainer ring in the card collar groove at middle part, and first, which clamps retainer ring, is arranged first bearing by the side of close end, second, which clamps retainer ring, is arranged second bearing close to the side of worm screw, and the outer ring pad of second bearing sets retaining ring.The abnormal sound problem that the utility model avoids rotor axial play from generating, structure is simple, improves comfort and service life；And rain shaving electrical machine assembly method good manufacturability.

Description

Rotor axial direction location structure and rain shaving electrical machine

Technical field

The utility model relates to motor device field, the rotor axial location structure of specifically a kind of wiper motor its Assembly method.

Background technique

Major auto vendor regard intelligence as one of most important attraction when releasing new model in recent years, and intelligent Windscreen wiper is also the development trend in future.Currently, some top-of-the-range versions have been equipped with intelligent windscreen wiper.Traditional windscreen wiper and intelligent windscreen wiper It compares, significant difference is the most, and the rotor of traditional rain shaving electrical machine is single direction rotation, and the rotor of intelligent windscreen wiper motor It is that forward and reverse both direction rotates, this just needs to eliminate the axial float of the forward and reverse of rotor, and rotor is avoided to turn Front and back play bring noise and abrasion during dynamic.

Publication No. is 107276263 A of CN, and date of publication is that the patent on October 20th, 2017 discloses a kind of motor pivot Anti-moving mounting structure and rain shaving electrical machine, the motor pivot Anti-moving mounting structure, including armature shaft and electric motor end cap, armature shaft It is rotatably arranged on electric motor end cap by connection component；Connection component includes the first ring being successively set on armature shaft Button, rolling bearing, elastic element, external member and the second latch closure, elastic element are disk spring, in compressive state and by the axis of rolling It holds pre-tensioner in the axial direction of armature shaft；Annular platform, rolling bearing end corresponding with elastic element are equipped in electric motor end cap Face and annular platform are affixed setting, and compress gasket, rolling bearing end corresponding with the first latch closure are additionally provided on electric motor end cap Face is compacted gasket and overlays.

Above-mentioned motor pivot Anti-moving mounting structure can prevent armature shaft play, realize the positive and negative rotation of motor, but also deposit Unbalancing value is bigger than normal, assembly is cumbersome, and motor entire length high to the dimension precision requirements of components is longer, weight The deficiencies of larger.From overall structure composition, armature shaft is connect by connection component with electric motor end cap, the rolling of connection component The side of dynamic bearing is fixed by compress gasket, and compress gasket inserts in the opening on electric motor end cap, the other side of rolling bearing For disk spring, external member and the second latch closure.Disk spring should have certain elasticity, play the role of eliminating scale error；Again Certain rigidity is kept, plays the role of preventing armature shaft play.Due to influencing the elasticity of disk spring and the factor of rigidity There are the various aspects such as size, the mechanical property of materials, thickness, disk spring eliminates scale error and prevents the effect of armature shaft play from having Limit, and influenced by related mating parts dimensional accuracy, consistency is difficult to ensure.From the point of view of the unbalancing value of rotor, armature Connection component is arranged on axis, connection component includes the first latch closure, rolling bearing, elastic element, external member and the second latch closure, is increased The quality of rotor increases the inertia of rotor, influences the unbalancing value of rotor-support-foundation system.From the point of view of assembly method, rotor-support-foundation system Assembly need first to fill the first latch closure, then fill rolling bearing, refill elastic element, then assembling kit, refill the second latch closure, finally Compress gasket is installed, hence it is evident that the deficiency that there are parts is more, assembly is cumbersome；Moreover, the assembly method of compress gasket is along armature Axis presses radially into, and in assembling process, the ball of rolling bearing can bear radial force, this can be such that the radial internal clearance of rolling bearing becomes Greatly, there is bearing abnormal noise problem, so the problem not high enough there is also qualification rate.

From the point of view of the specific components of above-mentioned motor pivot Anti-moving mounting structure, above-mentioned motor pivot Anti-moving installation The disk spring of structure is radial compression, and compressing force is the upper limit for the axial float power that can be born, therefore axial float effect phase To weaker.In addition, the decrement of disk spring is exactly the gap size that can be eliminated, since disk spring will keep certain rigid Property, decrement is limited, therefore the gap that disk spring can be eliminated also is limited.For rolling bearing, rolling bearing, which is avoided that, to be turned The axial float in former and later two sub directions, i.e. rolling bearing will bear the active force of both direction, the service life of rolling bearing It is relatively low.

Utility model content

The utility model provides a kind of rotor axial direction location structure first, solves existing armature shaft anti-shifting structure and disappears The problem of except gap and limited, consistency is difficult to ensure Anti-moving effect；And rotary inertia is bigger than normal, rotor unbalancing value is inclined Big problem；There are also the short problems of the service life of rolling bearing.

The technical scheme adopted by the utility model to solve the technical problem is as follows: rotor axial direction location structure, including Armature shaft, one end of armature shaft are provided with for the worm screw with worm gear, the end of the other end of armature shaft and armature shaft A card collar groove is respectively set in middle part, and assembly first clamps retainer ring, the retainer ring in the middle part of armature shaft in the card collar groove of armature shaft end Assembly second clamps retainer ring in slot, and first, which clamps retainer ring and second, clamps between retainer ring as the installation position of armature rotor and commutator Installation position；First clamping retainer ring is used to compress the first bearing being mounted in stator casing by the setting of the side of close end, the The outer ring of one bearing is compressed by stator casing, and the inner ring of first bearing clamps rand pressing by first；Second clamping retainer ring is close The second bearing of the bearing chamber for being assemblied in worm gear reducer is arranged in the side of worm screw, and the second clamping retainer ring is stuck in the second axis The inner ring held, the outer ring pad of second bearing set retaining ring, and retaining ring and the second clamping retainer ring are distributed in the two sides of second bearing, and retaining ring is set Set the flared structure for being convex to the outer ring of second bearing.Specifically, the retaining ring with respect to second bearing side directly and worm gear The bearing chamber of reduction gearbox is bonded.

The beneficial effect of rotor axial direction location structure is: one end of armature shaft clamps retainer ring and first axle by first It holds cooperation stator casing to be limited, avoids armature axial direction first bearing side play；The middle part of armature shaft passes through second It clamps retainer ring, second bearing and retaining ring cooperation worm gear reducer to be limited, avoids armature axial direction worm gear side play；Armature spindle To fixed reliable, zero clearance is realized, the play of rotor forwardly and rearwardly both direction is eliminated, before avoiding in rotor rotation process Play bring noise and wear phenomenon afterwards.Play, second bearing limit play forward, two bearings backward for first bearing limitation The play power of rotor forwardly and rearwardly has been shared, the service life of bearing has been improved, has also correspondinglyd increase the service life of motor. The position limiting structure components composition including second bearing in the middle part of armature shaft is few, is conducive to the unbalancing value for improving rotor；And And motor length has been shortened, motor weight is reduced, space, save the cost are saved.Retaining ring is radial compression deformation, and structure To be tubaeform, so that pressing-in force is small, withdraw force is big, and the axial float power that can be born is exactly withdraw force, is far longer than the pressure of retaining ring Compression deformation power, Anti-moving effect are good；The outer ring of second bearing is compressed by retaining ring, and retaining ring itself has certain elasticity, is reduced The requirement on machining accuracy of bearing chamber in worm gear reducer also reduces the precision of the corresponding retainer ring groove location of the second clamping retainer ring It is required that.

The utility model also provides a kind of rain shaving electrical machine, including stator casing, worm gear reducer and worm gear, stator casing are set Set open-ended, open-ended place connects worm gear reducer, and worm gear reducer and stator casing surround motor cavity, motor jointly Interior intracavitary setting stator and rotor, the rotor use any one of the above rotor axial direction location structure, the armature shaft Worm and wheel cooperation, bearing chamber is arranged in one end of the inside of stator casing, and the first bearing of armature shaft one end is installed on fixed In the bearing chamber of subshell, and the outer ring of first bearing is bonded with stator casing, preset clearance between inner ring and stator casing；Snail Bearing chamber is arranged in the inside for taking turns reduction gearbox, and second bearing and retaining ring are mounted in the bearing chamber of worm gear reducer, and retaining ring It is pressed into contact with to the outer ring of second bearing, second and clamps the inner ring of rand pressing to second bearing.

The utility model also provides a kind of rain shaving electrical machine assembly method, assembles to above-mentioned rain shaving electrical machine, including following Step:

S1. retaining ring, second bearing and rotor are assemblied in worm gear reducer, first bearing is assemblied in stator casing In bearing chamber；

S2. rotor and first bearing are assembled in stator casing, stator casing is made to compress first bearing outer ring；

S3. armature shaft is passed through into first bearing and second bearing, makes the first clamping rand pressing first bearing inner ring；It will gear Circle is compacted to the outer ring for touching second bearing, and second clamps rand pressing second bearing inner ring.

The beneficial effect of the utility model rain shaving electrical machine and rain shaving electrical machine assembly method is: what the retaining ring of rain shaving electrical machine assembled Mode is: retaining ring is depressed into second bearing outer ring, and first bearing outer ring is suppressed in stator casing bearing chamber end face, this be equivalent to retaining ring and Stator casing is clamped from both ends, completely eliminates gap, the gap that can be eliminated is bigger, more adaptable.The rotor of rain shaving electrical machine to Preceding and both direction backward play is completely eliminated, and avoids front and back play bring noise and abrasion in rotor rotation process, Improve the comfort and service life of motor.Rain shaving electrical machine assembly method is easy to operate, good manufacturability.

Detailed description of the invention

Fig. 1 is the structural schematic diagram of the utility model rain shaving electrical machine.

Fig. 2 is the cross-sectional view in the direction A-A in Fig. 1.

Components, position and number in figure: armature shaft 1, worm gear 2, first clamp retainer ring 3, second and clamp retainer ring 4, stator Shell 5, first bearing 6, worm gear reducer 7, second bearing 8, retaining ring 9.

Specific embodiment

The utility model is described in further detail with reference to the accompanying drawing.

As depicted in figs. 1 and 2, the utility model rotor axial direction location structure, including armature shaft 1, the one of armature shaft 1 End is provided with worm screw for cooperate with worm gear 2, i.e. worm screw of the right end setting of Fig. 1 and 2 for cooperating with worm gear 2, therefore armature Axis 1 is also worm shaft.A card collar groove, armature shaft 1 is respectively set in the end of the other end of armature shaft 1 and the middle part of armature shaft 1 Assembly first clamps retainer ring 3 in the card collar groove of end, and assembly second clamps retainer ring 4 in the card collar groove at 1 middle part of armature shaft.First folder It is the installation position of armature rotor and the installation position of commutator, the installation position of armature rotor between tight retainer ring 3 and the second clamping retainer ring 4 For installing armature rotor, the installation position of commutator is used to install the commutator of rain shaving electrical machine.

First clamps the side that retainer ring 3 leans on close end, i.e. the left side setting of Fig. 2 is mounted in stator casing 5 for compressing First bearing 6, the outer ring of first bearing 6 compresses by stator casing 5, and the inner ring of first bearing 6 is pressed by the first clamping retainer ring 3 Tightly.To clamp retainer ring 3 and first bearing 6 by first, armature shaft 1 can avoid to 6 side play of first bearing.

Second clamps the second of the bearing chamber that retainer ring 4 is arranged for being assemblied in worm gear reducer 7 close to the side of worm screw Bearing 8, the second clamping retainer ring 4 are stuck in the inner ring of second bearing 8, and the outer ring pad of second bearing 8 sets retaining ring 9, retaining ring 9 and the second folder Tight retainer ring 4 is distributed in the two sides of second bearing 8, and guide ring 9 is a kind of elastic component.Shown in Fig. 2, the right side of retaining ring 9 directly with The bearing chamber of worm gear reducer 7 contacts, and forms support, and after second clamps 4 clamping of retainer ring, the deformation of retaining ring 9 presses second bearing 8 Tight retaining ring 9.Since retaining ring 9 is a kind of elastic component, it is ensured that after assembly, when the second clamping retainer ring 4 compresses 8 inner ring of second bearing, The outer ring of retaining ring 9 and second bearing 8 is adjacent to and is in compressive state, avoids armature shaft 1 to 2 side play of worm gear.For example, retaining ring 9 have the flared structure for the outer ring for being convex to second bearing 8.Retaining ring 9 with respect to second bearing 8 side directly and worm gear reducer 7 bearing chamber fitting, to reduce amount of parts.

The utility model rain shaving electrical machine, as depicted in figs. 1 and 2, including stator casing 5, worm gear reducer 7 and worm gear 2, it is fixed Subshell 5 is arranged open-ended, and open-ended place connects worm gear reducer 7, and worm gear reducer 7 and stator casing 5 surround jointly Motor cavity, the interior setting stator of motor cavity and rotor.Wherein, the rotor uses above-mentioned rotor axial direction location structure. The worm and wheel 2 of armature shaft 1 cooperates.Bearing chamber, the first axle of 1 one end of armature shaft is arranged in one end of the inside of stator casing 5 It holds 6 to be installed in the bearing chamber of stator casing 5, and the outer ring of first bearing 6 is bonded with stator casing 5, outside inner ring and stator Preset clearance between shell 5, i.e., do not contact.Bearing chamber is arranged in the inside of worm gear reducer 7, and second bearing 8 and retaining ring 9 are mounted on In the bearing chamber of worm gear reducer 7, and retaining ring 9 is pressed into contact with to the outer ring of second bearing 8, and the second clamping retainer ring 4 is compacted to The inner ring of second bearing 8.Armature shaft 1 avoids 1 front and back play of armature shaft by being limited respectively at end and middle part two.

The utility model rain shaving electrical machine assembly method, assembles above-mentioned rain shaving electrical machine, comprising the following steps:

S1. retaining ring 9, second bearing 8 and rotor are assemblied in worm gear reducer 7, first bearing 6 is assemblied in outside stator In the bearing chamber of shell 5.

S2. rotor and first bearing 6 are assembled in stator casing 5, stator casing 5 is made to compress 6 outer ring of first bearing.

S3. armature shaft 1 is passed through into first bearing 6 and second bearing 8, compresses the first clamping retainer ring 3 in first bearing 6 Circle；Retaining ring 9 is compacted to the outer ring for touching second bearing 8, second, which clamps retainer ring 4, compresses 8 inner ring of second bearing.

Rain shaving electrical machine and its assembly method eliminate the dimensioned error bring gap due to each components, eliminate The play of rotor forwardly and rearwardly both direction, to avoid front and back play bring noise and mill in rotor rotation process Damage, improves the comfort and service life of motor.

Claims (3)

1. rotor axial direction location structure, including armature shaft (1), one end of armature shaft (1) is provided with for matching with worm gear (2) The worm screw of conjunction a, it is characterised in that: retainer ring is respectively set in the middle part of the end of the other end of armature shaft (1) and armature shaft (1) Slot, the interior assembly first of the card collar groove of armature shaft (1) end clamp retainer ring (3), assembly second in the card collar groove in the middle part of armature shaft (1) It clamps retainer ring (4), is installation position and the commutator of armature rotor between the first clamping retainer ring (3) and the second clamping retainer ring (4) Installation position；First clamps retainer ring (3) by the setting of the side of close end for compressing the first bearing being mounted in stator casing (5) (6), the outer ring of first bearing (6) is compressed by stator casing (5), and the inner ring of first bearing (6) clamps retainer ring (3) pressure by first Tightly；Second clamps the second axis of the bearing chamber that retainer ring (4) are arranged for being assemblied in worm gear reducer (7) close to the side of worm screw It holds (8), second clamps the inner ring that retainer ring (4) are stuck in second bearing (8), and the outer ring pad of second bearing (8) sets retaining ring (9), retaining ring (9) and second clamps the two sides that retainer ring (4) are distributed in second bearing (8), and the outer ring for being convex to second bearing (8) is arranged in retaining ring (9) Flared structure.

2. rotor axial direction location structure as described in claim 1, it is characterised in that: the retaining ring (9) is with respect to the second axis The side for holding (8) is directly bonded with the bearing chamber of worm gear reducer (7).

3. rain shaving electrical machine, including stator casing (5), worm gear reducer (7) and worm gear (2), stator casing (5) setting end is opened Mouthful, open-ended place connects worm gear reducer (7), and worm gear reducer (7) and stator casing (5) surround motor cavity jointly, electricity Intracavitary setting stator and rotor in machine, it is characterised in that:

The rotor uses the rotor axial direction location structure of the claims 1 or 2, the worm screw of the armature shaft (1) Cooperate with worm gear (2), bearing chamber, first bearing (6) peace of armature shaft (1) one end is arranged in one end of the inside of stator casing (5) In bearing chamber loaded on stator casing (5), and the outer ring of first bearing (6) is bonded with stator casing (5), inner ring and stator casing (5) preset clearance between；Bearing chamber is arranged in the inside of worm gear reducer (7), and second bearing (8) and retaining ring (9) are mounted on snail In the bearing chamber for taking turns reduction gearbox (7), and retaining ring (9) is pressed into contact with to the outer ring of second bearing (8), second and clamps retainer ring (4) It is compacted to the inner ring of second bearing (8).