CN206585404U - Brush motor, electric blower - Google Patents

Abstract

The utility model provides a kind of brush motor, electric blower.Brush motor possesses：Excitation member with field core and Exciting Windings for Transverse Differential Protection；Armature with armature core, armature winding and rotary shaft；Drum type cutting portion, it is arranged near the axial two ends of armature core；And V-shaped groove, it is arranged near the center of the width of the tooth of armature core.

Description

Brush motor, electric blower

Technical field

The utility model is related to a kind of brush motor for being equipped on electric dust collector etc. and to possess commutator electronic The electric blower of machine.

Background technology

The centrifugal fan with high suction pressure is employed in the electric blower for be equipped on electric dust collector.Should be from Heart fan is fixed on the rotary shaft of motor to rotate the centrifugal fan, thus produces pressure, but needs to make motor high Rotate fastly, therefore used brush motor.

The winding coiling on iron core and the armature with rotary shaft are used in brush motor.For armature, use The lap winding of lap wound is carried out across trough.

In addition, in conventional brush motor, sometimes due in the bias or winding process of iron core and rotary shaft Coiling entanglement etc. and the position of centre of gravity of armature deviates from axle center.In order to suppress shaking caused by the skew of the position of centre of gravity Move, it is necessary to be corrected to weight imbalance.

Particularly, the brush motor of electric dust collector is equipped on to rotate with more than 30,000 revs/min of high speed, even A little skew of position of centre of gravity, also significantly influences the vibration of motor.Accordingly, it would be desirable to improve the essence of the unbalanced correction of weight Degree.

As the method being corrected to weight imbalance, for example, exist described in No. 2677134 publications of Japanese Patent No. As use dynamic balancer etc. determine the weight amount of unbalance of armature and be corrected as described below method, side Formula.That is, exist and circle of the drum type cutting machine corresponding with the diameter of iron core to armature is utilized centered on the unbalanced direction of weight The bearing calibration based on polar coordinate method that cylinder laminated iron core is cut.It additionally, there are and be always with the center of correcting range The correcting mode based on component mode that the mode at the center of groove is cut in two times by drum type cutting machine.Or, it is to make Correcting mode cut with V-shape cutting machine in the central mode that correcting range is always tooth etc..

Illustrate the machining method of conventional brush motor using Fig. 4 and Fig. 5.Fig. 4 is that conventional commutator is electronic The stereogram of the armature 101 of machine.The tegillum of iron core 102 of armature 101 builds up cylinder.Armature 101 has multiple open slots 103 and many Individual tooth 104.T-shaped tooth-like part 105 is provided with the front end of tooth 104.

It is uneven with correcting weight that the weight amount of unbalance of armature 101 is determined using dynamic balancer.It is dynamic with what is obtained Centered on unbalanced direction, cutting removal is carried out to the T-shaped tooth-like part 105 of the tooth 104 of iron core 102 throughout several ground of tooth 104. Thus, drum type cutting portion 106 is set out.

Fig. 5 is the stereogram of other armatures of conventional brush motor.To the T-shaped dentation of the tooth 104 of iron core 102 The cutting that the circumferential center in portion 105 carries out V-shaped is removed.Thus, V-shaped groove 107 is set out.Thereby, it is possible to improve weight not Balance.

In order to improve the precision being corrected to the imbalance of the armature of brush motor, it is also proposed that to balance correction Method studied obtained by balancing adjustment system (with reference to No. 3406838 publications of Japanese Patent No. and Japanese Patent Laid-Open 2011-101444 publications).

But, in recent years, because the requirement of the more low noise to electric dust collector is, it is necessary to further suppress electric blower Vibration.In order to suppress the vibration of electric blower, it is important that suppress the weight amount of unbalance of the armature as rotary body.

In the armature 101 of Fig. 4 conventional brush motor, with for winding opening for coiling on iron core 102 Mouth groove 103.The ratio existed according to open slot 103 at the position that the teeth portion to iron core 102 is cut, and actual cutting It is poor to be produced between amount and the cutting output of target.Therefore, the precision of the unbalanced correction of weight is insufficient, the mistake of weight amount of unbalance Difference becomes big.Thus with the vibration that can not be adequately suppressed motor the problem of.

If other armatures of Fig. 5 conventional brush motor, then due to open slot not being included in into cutting In the range of, therefore, it is possible to obtain cutting output stabilization and the effect of weight amount of unbalance can be suppressed.But, in the uneven school of weight In the case that the weight amount of unbalance of just preceding armature is big, due to for cutting weight of the correcting weight required for uneven not Foot, therefore easily generation can not carry out the armature of the unbalanced correction of weight, the problem of bad loss that there is armature increases.Cause And, it is difficult to it is adopted as the mass production method of home appliance.

Also there is following method：As Japanese Patent Laid-Open 2011-101444 publications, pass through V-shape cutting machine The cutting of size corresponding with weight amount of unbalance is carried out in the width central part of the tooth of the outer peripheral face (leading section) of iron core Processing, is consequently formed notch.In the method, due to open slot not being included in the range of cutting, therefore cutting output is stable And weight amount of unbalance can be suppressed.But, in the case that the weight amount of unbalance of the armature before weight disequilibrium regulating is big, Because the cutting weight for correcting weight required for uneven is not enough, therefore it is insufficient easily to produce the unbalanced correction of weight Armature, the problem of bad loss that there is armature increases.

As No. 3406838 publications of Japanese Patent No., weight is uneven, obtained near the two ends of armature core Unbalance dynamic can be separated into the static unbalance obtained according to the position of centre of gravity of armature and the couple unbalance as torque again.Can Unbalancing value is obtained using following dynamic balancer, the dynamic balancer bears rotary shaft at two positions, makes Band (belt) is contacted with its outer diameter of armature, and armature is rotated by drive belt, measures amount of unbalance.It is dynamic based on what is obtained Amount of unbalance and its angle calculate static-unbalance and couple-unbalance.

On the unbalanced correction of weight, general use is cut to correct dynamic balancing near the two ends to armature core Bearing calibration.In order to which the weight for further suppressing to remain due to the error that weight balancing is corrected is uneven, also exists and carry out The method that the second correcting process to carry out static balance correction is cut to the stacked direction immediate vicinity of armature core.

In order to accurately obtain the unbalancing value of armature by dynamic balancer, it is necessary to make band not have with its outer diameter Irregular part is abutted and drive belt.After being cut by the cutting cutting machine of the iron core external diameter of essence its outer diameter The external diameter in face is less than the external diameter for the part do not cut.Therefore, the part that is contacted with iron core in the band feelings overlapping with cutting portion Under condition, the diameter for its outer diameter that band is abutted changes.Thus, the rotating speed of armature changes, the measure of amount of unbalance Deterioration in accuracy.

Therefore, in the first correcting process for carrying out being cut near the two ends to armature core for dynamic balance calibration Afterwards in order to which static balance is corrected and carries out the side of the second correcting process cut the stacked direction immediate vicinity of armature core In method, measure is also balanced after the second correcting process.Therefore, in order to do not carrying out iron core cutting part carry out band Drive and need the folded thickness of sufficient iron core.

Usually, in the brush motor of the electric blower used in home appliance, in order to carry out with driving Need the part for not carrying out iron core cutting that there is 10mm or so in the stacking direction.Therefore, in order to carry out the second correcting process, And plus the size to being cut near the two ends of iron core, and it is expected that the folded thickness that iron core is laminated is more than 25mm.

Utility model content

However, in recent years, in order to tackle the miniaturization of home appliance, and requiring to reduce the laminated iron core of motor Folded thickness.With the unbalanced problem of weight that is folded thick and suppressing armature for being difficult to take into account the laminated iron core for reducing motor.

The utility model is in view of completing the problem of above-mentioned conventional brush motor, its object is to provide one Plant and take into account the further suppression that can realize vibration and the brush motor of small-size light-weight.

In order to achieve the above object, brush motor of the present utility model possesses：With field core and Exciting Windings for Transverse Differential Protection Excitation member；Armature with armature core, armature winding and rotary shaft；Drum type cutting portion, it is arranged on armature core Near the two ends of axial direction；And V-shaped groove, it is arranged near the center of the width of the tooth of the armature core.

Preferably, the folded thickness of the armature core is below 20mm.

Electric blower of the present utility model possesses above-mentioned brush motor.

Thereby, it is possible to provide a kind of further suppression for taking into account vibration and the brush motor of small-size light-weight.

According to the utility model, even can realize that a kind of folded thick armature for reducing laminated iron core also can be high-precision Degree ground suppresses uneven weight, small-size light-weight and the brush motor for suppressing vibration.

Brief description of the drawings

Fig. 1 is the half sectional view for the electric blower for possessing the brush motor in embodiment of the present utility model.

Fig. 2 is the stereogram of the armature of the brush motor in embodiment of the present utility model.

Fig. 3 is the partial section of the armature in embodiment of the present utility model.

Fig. 4 is the stereogram of the armature of conventional brush motor.

Fig. 5 is the stereogram of other armatures of conventional brush motor.

Embodiment

Hereinafter, embodiment of the present utility model is illustrated using Fig. 1 to Fig. 3.In the present embodiment, electric dust absorption is enumerated Illustrated exemplified by the electric blower used in device.Fig. 1 is that the commutator possessed in embodiment of the present utility model is electronic The half sectional view of the electric blower of machine.Fig. 2 is the stereogram of the armature of the brush motor in the embodiment.Fig. 3 is The partial section of armature in the embodiment.

As shown in figure 1, in electric blower 1, being closed in a side and in the cylindric framework 2 of its opposite direction opening It is provided with brush motor.Include excitation member 3 and armature 4 to brush motor summary.Excitation member 3 possesses the cylinder that is square The field core 5 and Exciting Windings for Transverse Differential Protection 6 of shape, the field core 5 are formed with a pair of opposite salient poles in it, the Exciting Windings for Transverse Differential Protection 6 It is wound in salient pole.Armature 4 is rotatably arranged in cylinder in the way of between the salient pole.

End cap 7 and fan guard 8 are installed in the way of the opening side of covering framework 2.The rotary shaft 9 of armature 4 is from end cap 7 Project into fan guard 8.Centrifugal fan 10 is installed in the leading section of rotary shaft 9.In centrifugal fan 10 and framework 2 End cap 7 and air guide element 11 are installed between opening.Centrifugal fan 10 and air guide element 11 are configured in fan guard 8.

As shown in Figures 2 and 3, armature 4 has armature core 21, armature winding 22, commutator 23 and rotary shaft 9.Electricity Multiple thin plates are laminated and constituted by pivot iron core 21, with multiple open slots 28 and multiple teeth 25.The stacking of armature core 21 The folded thickness in direction is set to below 20mm.

T-shaped tooth-like part 26 is provided with the front end of tooth 25.Armature winding 22 by across lap wound in the way of groove 24 in tooth 25. Will not be in rotation with the armature winding 22 for be accommodated in groove 24 inserted with wedge 27 between armature winding 22 and T-shaped tooth-like part 26 It is outstanding during turning.

Here, being illustrated to the unbalanced bearing calibration of weight produced due to coiling entanglement etc..In order to carry out One balance correction, the weight amount of unbalance of armature 4 is determined using dynamic balancer.Using the direction of unbalance dynamic obtained in The heart, is cut the periphery at the two ends of armature core 21 by drum type cutting machine corresponding with the diameter of armature core 21, from And drum type cutting portion 30 is set out.T-shaped tooth-like part 26 has the function of preventing that wedge 27 from dispersing, it is therefore desirable to cut iron core Radial direction size be less than T-shaped tooth-like part 26 thickness.In the state of the cutting size of radial direction is limited, by cutting drum type Cutting mill is moved in the stacking direction, to adjust the cutting weight (weight balancing correcting process) of needs.

Then, in order to carry out the second balance correction, the weight amount of unbalance of armature 4 is determined again, and selection is closest to be obtained Static unbalance direction tooth 25, become most deep mode with the center of the width of tooth 25 and cut V-shaped groove 31 to enter Row adjustment (static unbalance correcting process).By the way that the width of V-shaped groove 31 to be set as to the narrow width than tooth 25, also exist after cutting The two ends of the width of tooth 25 remain armature core 21.

Therefore, the external diameter of the armature core 21 before the external diameter of the armature core 21 after cutting and cutting is substantially the same.Profit With band make armature 4 rotate when rotating speed also do not change, so as to with it is initial when identical rotating speed measure.Thus, Weight can accurately be measured uneven.

As described above, even if the weight before correction is uneven big, it can also ensure that the cutting weight of needs.In the second school Center, the cutting output of armature core will not be influenceed by open slot, can reduce error.Thus, will not produce to be carried out The armature of the unbalanced correction of weight, can accurately suppress weight uneven.Particularly, if the folded thickness of armature core is Below 20mm armature, then play significant effect.

After second corrects, the V-shaped groove 31 that has in the substantial center of armature core is shaped as V-shaped.Cause This, in order to determine the amount of unbalance of residual, even if the position of the band of driving armature is overlapping with V-shaped groove 31, band is also outer with iron core Footpath is contacted, therefore will not produce influence to rotating speed, can be accurately measured.

In addition, the utility model is not limited to embodiment, for example, V-shaped groove 31 can also be set to U-lag shape.

As described above, the brush motor of present embodiment possesses：Encouraging with field core 5 and Exciting Windings for Transverse Differential Protection 6 Magnetic part 3；Armature 4 with armature core 21, armature winding 22 and rotary shaft 9；Drum type cutting portion 30, it is arranged on armature iron Near the axial two ends of core 21；And V-shaped groove 31, it is arranged on the central attached of the width of the tooth 25 of armature core 21 Closely.

Thus, even reducing the folded thick armature 4 of laminated iron core, weight imbalance also can accurately be suppressed, Small-size light-weight can be realized and the brush motor of vibration is inhibited.

It is further preferred, that the folded thickness of armature core 21 is below 20mm.

In addition, electric blower 1 can also possess the brush motor of present embodiment.

According to the utility model, small-size light-weight and take into account the brush motor of low vibration and can be applied to electric blower Etc. various electrical equipments.

Claims (3)

1. a kind of brush motor, it is characterised in that possess：

Excitation member with field core and Exciting Windings for Transverse Differential Protection；

Armature with armature core, armature winding and rotary shaft；

Drum type cutting portion, it is arranged near the axial two ends of the armature core；And

V-shaped groove, it is arranged near the center of the width of the tooth of the armature core.

2. brush motor according to claim 1, it is characterised in that

The folded thickness of the armature core is below 20mm.

3. a kind of electric blower, it is characterised in that possess brush motor according to claim 1 or 2.