CN1086641A - Small DC motor is arranged - Google Patents
Small DC motor is arranged Download PDFInfo
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- CN1086641A CN1086641A CN 93119703 CN93119703A CN1086641A CN 1086641 A CN1086641 A CN 1086641A CN 93119703 CN93119703 CN 93119703 CN 93119703 A CN93119703 A CN 93119703A CN 1086641 A CN1086641 A CN 1086641A
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- 230000015572 biosynthetic process Effects 0.000 claims abstract description 18
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- 230000009467 reduction Effects 0.000 claims description 10
- 230000007246 mechanism Effects 0.000 abstract description 4
- 230000000694 effects Effects 0.000 abstract description 2
- 230000008092 positive effect Effects 0.000 abstract 1
- 210000000056 organ Anatomy 0.000 description 21
- 230000002093 peripheral effect Effects 0.000 description 7
- 238000002788 crimping Methods 0.000 description 6
- 230000004888 barrier function Effects 0.000 description 5
- 238000012423 maintenance Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000003321 amplification Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 230000004907 flux Effects 0.000 description 2
- 239000011810 insulating material Substances 0.000 description 2
- 230000033001 locomotion Effects 0.000 description 2
- 230000005415 magnetization Effects 0.000 description 2
- 238000003199 nucleic acid amplification method Methods 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 229910000976 Electrical steel Inorganic materials 0.000 description 1
- 230000004323 axial length Effects 0.000 description 1
- WCCJDBZJUYKDBF-UHFFFAOYSA-N copper silicon Chemical compound [Si].[Cu] WCCJDBZJUYKDBF-UHFFFAOYSA-N 0.000 description 1
- 230000000994 depressogenic effect Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
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Abstract
The present invention is about having small DC motor and rotor supporting mechanism thereof, armature spindle and the bearing that supports this with rotation, form this top coniform, support this conical end with the conical bore of bearing, or with being arranged on the armature spindle top that the supporting commutator keeps the bearing supporting on the body to fix, have axle and bearing formation line are contacted, positive effect such as non-loosening radially, in addition, also has the brush that contacts with commutator segment with authorized pressure, the DC motor of flattening can be constituted, and effects such as motor noise level can be reduced.
Description
The present invention is about there being small DC motor.
Traditional have a small DC motor, for example, and as real clear 64-54754 communique, i.e. the aftermentioned structure as shown in Figure 14 opened of Japan Patent.
In aftermentioned Figure 14,71 for forming the stator case of cup-shaped, and the central authorities in suitable these stator case 71 bottoms form cylindric the 71b that runs through this bottom.The 1st bearing 80 is fixed on the inner peripheral surface of this cylindric part 71b.
In addition, by the riveted joint or the mode that is pressed into side plate 73 is fixed on the open end (diagram upside) of stator case.
Keep body 74 to be fixed on the inboard of this side plate 73 resin system brush by screw thread or resin forming.
At the central portion shape pouch of this brush maintenance body 74, and cylindric the 74a that stretches out to foreign side's (side plate 73 1 sides).The 2nd bearing 81 is fixed on the inner peripheral surface of this cylindric 74a.With gyroaxis 82 free rotaring ground supportings of armature 76 in the 1st bearing 80 and the 2nd bearing 81.Armature 76 comprises armature core 84 and the rectification sub-member 85 that setting-in is fixed on the coil 83 of reeling on the gyroaxis 82.Ringshaped magnet 72 is fixed on the inner peripheral surface of cup-shaped stator case 71, and in accordance with regulations at interval, is disposed at the relative position of armature core 84 outer peripheral faces.Make in the sliding contacting part 75b of the top of brush 75 formation and the side face sliding contact of rectification sub-member 85.The base portion of brush 75 is fixed on the brush maintenance body 74, in addition, keeps forming extension 74a on the body 74, make in the portion of terminal 75a embedded hole of brush 75, make fixed-site by making extension 74a generation thermal deformation form to weld at brush.On stator case 71, form fenestra 71a, brush portion of terminal 75a is stretched out to the outside.A set of cups 86 is entrenched on the gyroaxis 82 of armature core 84 downsides in addition.
On above-mentioned armature core 84, the terminal 75a of brush 75 is linked to each other with not shown power supply, the commutator 85 of crimping mutually with the sliding contacting part 75b of this brush 75 is installed, through brush 75 power supplies, when the sense of current that switches flowing through coil 83 and phase place, there is small DC motor promptly to turn round driving.
Have in the small DC motor structure in above-mentioned tradition, owing between gyroaxis and the 1st, the 2nd bearing, have the gap, therefore the existence in gap correspondingly makes radially easily to produce looseningly, and this is loosening to form the main cause of motor noise when becoming motor and driving.
In addition, when to make this loosening tailing off in order preventing to produce this motor noise, to produce again and make gyroaxis and the contact of the 1st, the 2 bearing formation face, and make steering resistance become big problem.
Yet, use the small DC motor that has of cylindric rectification sub-member, existing final conclusion aspect noise and motor reliability, yet, rectification sub-member is formed cylindric, need certain axial space.
In addition, in order to make this brush energy crimping rectification sub-member that has small DC motor to use, wideer than the rectification sub-member (diameter) direction is narrow at interval for it.
Therefore, the assembling of motor becomes the operation that commutator will be inserted between narrow at interval brush, thereby has the problem of assembling aspect.
In addition, use the small DC motor that has of discoideus rectification sub-member, though the problem in axial space or the assembling do not occur, compare with cylindric rectification sub-member yet exist, making radially, volume becomes big problem.
Therefore, the object of the invention is to provide and can prevents becoming flexible between gyroaxis and the 1st, the 2 bearing, and motor noise is lowered, and the good motor of assembleability is made.
Simple declaration to accompanying drawing
Fig. 1 has the small DC motor side cutaway view for expression the present invention the 1st embodiment,
Fig. 2 is a motor vertical view shown in Figure 1,
Fig. 3 is the stereogram of expression critical piece armature of the present invention (commutator),
Fig. 4 has the small DC motor side cutaway view for expression the present invention the 2nd embodiment,
Fig. 5 is the amplification profile of expression the present invention's the 2nd embodiment critical piece axle and parts of bearings contact condition,
Fig. 6 is the amplification profile of expression the present invention's the 2nd embodiment critical piece axle and parts of bearings variation,
Fig. 7 has the small DC motor side cutaway view for expression the present invention the 3rd embodiment,
Fig. 8 is the vertical view of the electronic organ of expression the present invention the 4th embodiment,
Fig. 9 is along A-A line profile among Fig. 8,
Figure 10 is a profile of only representing electronic organ frame,
Figure 11-1 is the vertical view of the electronic organ of expression the present invention the 5th embodiment,
Figure 11-2 is the A-A line profile along Figure 11-1,
Figure 12-1 is the vertical view of the electronic organ of expression the present invention the 6th embodiment,
Figure 12-2 is the A-A line profile along Figure 12-1,
Figure 13-1 is the vertical view of the electronic organ of expression the present invention the 7th embodiment,
Figure 13-2 is the profile along the A-A line of Figure 13-1,
Figure 14 has the small DC motor side cutaway view for tradition.
Below, with reference to accompanying drawing the present invention the 1st embodiment is described.
Among Fig. 1,1 expression has a small DC motor, armature 30(3 is installed, 10 in this has the 1st stator case 2 of small DC motor 1) and stator department 4, and the lid 5 that is used as the 2nd stator case seals.
In the 1st embodiment, shown in Fig. 2-3, form along three directions and to stretch out the utmost point 72, the stretching out the utmost point 72 and can be not limited thereto number of formation.
In addition, form umbrella portion 73 respectively on the top of respectively stretching out the utmost point 72, and form its width flank 74 narrower respectively than the width of umbrella portion 73 in these umbrella portions 73 and 70 of ring portions along circular-arc expansion.
On each flank 74,, to form insulating barrier 14 and be in order to prevent and cause short circuit by rotor core and do not bring into play motor function (for example, can not drive etc.) 15 of the surface of respectively stretching out the utmost point 72 and each coils across the coil 15 of insulating barrier 14 around the last regulation number of turn.Rectification sub-member 10 comprises and keeps body 8 and commutator 9.In addition, on the bottom 2a of the 1st stator case 2, form the bearing portion 6 stretch out upward, but in the axis hole 6a that gyroaxis 11 free rotaring ground supportings are formed in this bearing portion 6, make its free end 11a stretch out outside at the 1st stator case 2 from bottom 2a.In addition, the protuberance 8a of the commutator retainer 8 of supporting commutator 9 is embedded in the hole portion 71 of ring portion 70 of rotor core 7.Protuberance 8a contacts with the top of bearing portion 6 by pad 18.Be formed with bottom outlet 8b on protuberance 8a, the cardinal extremity 11b of gyroaxis 11 is pressed into this to be had in the bottom outlet 8b, forms to make commutator keep body 8 and gyroaxis 11 to turn round together.
Shown in Fig. 2-3, keep forming on the body 8 conus portion 8c at commutator, being molded on the conus portion 8b by having commutator 9 insertions that become by cone sheet group that its summit is positioned on the axis of rotation of gyroaxis 11 with cone shape.Commutator 9 can be changed the sense of current of flowing through coil 15, in the 1st embodiment, uses not shown cutter cutting to form groove 20, makes it be divided into three.The surperficial 9a of a pair of brush 16 and commutator 9 is contacted.Each end of a pair of brush 16 is connected with not shown power supply, its other end is bearing on the support unit 21 that is fixed in lid 5 inboards.
A pair of brush 16 is used for the never illustrated power supply of electric current is delivered to commutator 9, be inserted into have with the same support unit 21 that tilt, that form with insulating material of the conical surface 9a of commutator 9 on.In view of the above, when lid 5 being installed on the 1st stator case 2, a pair of brush 16 is contacted with commutator 9, and apply certain pressure to commutator 9 simultaneously.In addition,, form separately from commutator and keep body 8, and along three electrode terminals 17 that three directions are extended to radial direction in the periphery of commutator 9, make each electrode terminal 17 and in accordance with regulations the coil 15 that is wound on the above-mentioned rotor core 7 of the number of turn be electrically connected.In addition, around rotor core 7,, circular-arc magnet 12 is arranged on the 1st stator case 2 by yoke 13 as stator 4.Stationary part 4 is made up of the yoke 13 and the magnet 12 that are fixed on the 1st stator case 2.Stationary part 4 is arranged to relative gyroaxis 11 coaxial lines, and the air gap d of regulation is set between magnet 12 and rotor core 7.
In addition, as shown in Figure 1, make the axial median plane Z of the revolution that is positioned at rotor core 7 and be positioned at the state that the position along the magnetic force median plane Z ' of the space magnetic flux density maximum of gyratory directions of magnet 12 is drawn back along the gyroaxis direction, just in Fig. 1, make magnetic force median plane Z ' be positioned at the top of median plane Z.In view of the above, make rotor core 7 often have trend, do one's utmost to make the gap of 6 in gyroaxis 11 and bearing portion controlled, motor is turned round smoothly, in addition, can also lower motor noise towards the motion of arrow P direction because of the magnetic attraction of magnet 12.
In addition, because above-mentioned magnetic attraction, when motor turns round, also have sufficient intensity, do not turned round the influence of centrifugal force etc. towards the arrow P direction.Do one's utmost to control the gap between gyroaxis 11 and the bearing portions 6, the motor revolution is carried out smoothly.In addition, at rotor portion 3, because of the magnetic attraction effect of magnet 12, making rotor portion 3 towards the arrow P direction, is exactly the top towards the 1st stator case 2, leaves pad 18 and turns round.In addition, 19 expression snap rings.
The small DC motor action that has to above-mentioned formation now describes.
When making not shown power connection, electric current is by a pair of brush 16, and commutator 9 flows into coil 15, and makes the rotor core magnetization.
At this moment, the sense of current that flows into coil 15 is switched with identical commutator 9, thereby the magnetic pole of formation is also changed at any time, with and the power that repels mutually in the magnetic field of magnet 12 make rotor portion 3 revolutions, along with gyroaxis 11 is turned round.
Like this, because the summit is positioned on the shaft centre line of gyroaxis 11, forming cone shape commutator 9 is configured on the conus portion 8c of commutator maintenance body 8, what keep forming on the protuberance 8a of body 8 supporting rotating shaft 11 at commutator has a bottom outlet 8b, can reduce the axial space of occupying of relative commutator 9, thereby can make small DC motor 1 reach inclined to one side graduation.
In addition, since commutator 9 formation are coniform, can make the cutter when on its surperficial 9a, forming groove 20 dodge the angle minimizing, owing to can suppress the radially expansion of commutator 9, when this commutator peripheral speed is reduced, can guarantee the contact-making surface of brush 16 and commutator 9.
Just traditional rectification sub-member is cylindric or discoideus, is according to number of poles, on the surface of this rectification sub-member, forms that groove cuts apart with cutter etc.
For example, as make above-mentioned rectification sub-member have three utmost points, then, on the surface of this rectification sub-member, form groove by 120 ° intervals and cut apart with cutter etc.At this moment, if the cylindrical shape rectification sub-member owing to can move the formation groove by making cutter or rectification sub-member, therefore, can not disturb with other groove and carries out cutting apart of rectification sub-member.
Yet the occasion of formation groove on discoideus rectification sub-member because cutter is circular, must forms blade and dodge, thereby have boundary naturally on minor diameterization in the central authorities of rectification sub-member.
Just if make brush contact susface keep identical with cylindric rectification sub-member, can only make radially to become big, its result produces the peripheral speed that makes rectification sub-member and becomes big, makes noise become big problem easily.
In addition, have in the small DC motor at the 1st embodiment, owing in advance brush 16 is fixed on the holding member 21 that forms on the lid 5, after rotor portion 3 being installed on the 1st stator case 2, when lid 5 is installed on the 1st stator case 2, owing to finished the assembling of the assigned position relation that keeps brush 16 and commutator 9, therefore, can make the motor unit dressing easy.
Below, with reference to accompanying drawing the present invention the 2nd embodiment is described.
With the identical part of above-mentioned the 1st embodiment, symbol is identical.
Constructionally do not exist together, be among above-mentioned the 1st embodiment, make axle 11 and armature 30 form the one revolution, yet the 2nd embodiment there is a small DC motor 1, as shown in Figure 4, makes axle 24 fixing.
In addition, the supporting construction of the armature that small DC motor 1 is arranged 30 among the 2nd embodiment, the bolster that supports about armature 30 can freely be turned round exactly and the structure of bearing portion specifically.
As shown in Figure 4, armature 30 and stationary part 4 are installed in the 1st stator case 2 by the 2nd small DC motor that embodiment is shown with 1, and the lid 5 that is used as the 2nd stator case is sealed.
Forming the bearing portion 6 of above diagram, stretching out and recessed thrust bearing division 25 on the bottom 2a of the 1st stator case 2 downwards.Armature comprises can rotor portions 3 and the rectification sub-member 10 of free rotaring ground supporting on the bolster 24 that is fixed in the bearing portion 6.It is cylindric that bolster 24 has the ladder of size diameter, is positioned at bottom 2a one side of the 1st stator case 2 among the cardinal extremity 24a(figure of bolster 24, promptly embeds the part of bearing portions 6) be formed into minor diameter.In addition, lid 5 one sides among the top 24b(figure of bolster 24) as Fig. 2, form coniformly as shown in Figure 3, this coniform top forms little hemisphere face, has cone angle alpha
1The cardinal extremity 24a of bolster 24 is pressed in the axis hole 6a that forms in the bearing portion 6, it is fixed on the 1st stator case 2.Rotor core 7 is to be laminated by the silicon steel plate with excellent magnetic, because its shape is identical with above-mentioned the 1st embodiment, so no longer describe.
The commutator with flange 8c keep body 8 be embedded in rotor core 7 in the 7a of hole portion that is formed centrally.Keep the commutator for supporting commutator 9 body 8 to embed and form one in the commutator 9.Commutator in embedding rotor core 7 keeps an end 8a of body 8 to form recess 8b, forms the axis hole 27 of supporting bolster 24 at this recess 8b.Keep forming on the body 8 the conus portion 8d that is coniform protuberance at commutator, being fixed on this tapered segment 8d by having the commutator 9 that its summit is positioned at the cone sheet group one-tenth on the centre of gyration axis of bolster 24.
The section shape of axis hole 27 is because as shown in Figure 5, form the diameter of its openend 27a bigger slightly than the diameter of bolster 24, its blind end 27b formation had the coniform of rake 27c, this section shape is an equilateral triangle shown in Figure 5, and the summit of equilateral triangle is positioned on the centre of gyration axis of bolster 24.
In addition, as shown in Figure 5, with the apex angle of equilateral triangle
2Formation is than the cone angle alpha of bolster 24
1Big slightly.Be exactly in above-mentioned angle [alpha]
2And cone angle alpha
1Between the poor (α of angulation
2-α
1).
As shown in Figure 4, the protuberance 28a of the gear made from insulating material 28 is pressed in the depressed part 8b of commutator maintenance body 8, makes this protuberance 28a energy free rotaring ground supporting on bolster 24.Therefore, make gear 28, commutator keeps body 8 and rotor core 7 to form one, and can be supported in freely to rotate on the bolster 24.In addition, by insulating barrier 14 with coil 15 be wound on rotor core 7 around.In addition, be provided in around the rotor core 7 being fixed on circular-arc magnet 12 on the 1st stator case 2 by yoke 13.These stator departments 4 are configured to relative bolster 24 are concentric shape, between magnet 12 and rotor core 7, be provided with the air gap d of regulation.
In addition, with in above-mentioned the 1st embodiment, put down in writing the same, as shown in Figure 4, the position of magnetic median plane Z ' that makes the axial median plane Z of the revolution that is positioned at rotor core 7 and be positioned at the axial space of the revolution magnetic flux density maximum of magnet 12 is the state of drawing back along the gyroaxis direction, in Fig. 1, magnetic median plane Z ' is configured in exactly median plane Z above.
In view of the above, rotor core 7 is often had along magnetic median plane Z ' direction because of the magnetic attraction of magnet 12, it is the movement tendency of arrow P direction, elastic force is kept bolster 24 and is had the gap that the commutator of bearing portion keeps 8 of bodies, motor is turned round smoothly, in addition, can reduce the motor noise level.
In addition, even above-mentioned magnetic attraction towards the arrow P direction when motor turns round, the also suitable intensity of tool, the influence of centrifugal force etc. when not turned round, the commutator that can powerful keep bolster 24 and have a bearing portion keeps the gap between the body 8, and the motor revolution is carried out smoothly.
In addition, but output shaft 26 free rotaring ground supportings that the turning power that small DC motor is arranged is transmitted to the outside on the thrust bearing division 25 and lid 5 that form on the 1st stator case 2 as the 2nd stator case.Be fixed on this output shaft 26 forming output gears 29 one, gear 28 engagements, the revolution of rotor portions 3 is delivered on the output shaft 26 with rotor core 7.In addition, in the 2nd embodiment, the side 27c that remains silent of the axis hole 27 of bolster 24 is formed conical surface-shaped, yet can be not limited thereto, also can as shown in Figure 6 the axis hole top be formed recess A.
Important is as long as the formation of axis hole inner face is had the cone angle alpha that forms than on bolster 24
1Also want big apex angle
2Shape just can.
The action that small DC motor 1 is arranged to such formation now describes.
When making not shown power connection, power supply flows into coil 15 by a pair of brush 16 and commutator 9, makes rotor core 7 magnetization.At this moment, flow into the electric current and the phase place that pass circle 15 with 9 pairs in commutator and switch, the magnetic pole of formation is changed at any time, make rotor portions 3 revolutions with the repulsive force in the magnetic field of magnet 12.
In addition, in rotor portions 3, because of the magnetic attraction of magnet 12 works, make rotor portions 3 to the arrow P direction, push to the below of the 1st stator case 2 exactly, thereby when making the taper seat of the tapered portion 27c of axis hole 27 and bolster 24 top 24b form press contacts, make rotor portions 3 revolutions.When rotor portions 3 revolutions, make the output shaft revolution and outputting power by gear 28 and output gear 29.
At this moment, because with the angle [alpha] of the tapered portion 27c of axis hole 27
2Set cone angle alpha for than bolster 24 top 24b
1Big slightly, therefore,, make the top 24b of the tapered portion 27c crimping bolster 24 of axis hole 27 even with the magnetic attraction of magnet 12, neither be with the face contact but turn round with the line contact condition.
With such structure, when can make radially loosening minimizing of rotor portions 3, the contact site that makes bolster 24 and axis hole 27 is that line contacts, thereby revolution frictional resistance is reduced.
In addition, owing to keep forming on the body 8 dead eye 27 of bearing portion at commutator, this with compare at the conventional art that sets bearing portion up and down of the 1st stator case 2 respectively, the space of occupying of bearing portion is vertically tailed off, thereby can reach the whole flattening of motor.
Below, Fig. 7 represents the present invention the 3rd embodiment.
This 3rd embodiment is the same with the 1st embodiment, be relevant axle rotary type have small DC motor and the constructional difference of the 1st embodiment to be to utilize to use as the lid part of the 2nd stator case bearing portion as supporting rotating shaft.
Among Fig. 7, form 32, the 2 bearing portions 33 of the 1st bearing portion respectively at the 1st stator case 30 and on as the lid 31 of the 2nd stator case, with gyroaxis 34 free rotaring ground supportings in these 32, the 2 bearing portions 33 of the 1st bearing portion.
Form axis hole 32a in the 1st bearing portion 32, the section shape of this axis hole 32a is the same with the 2nd embodiment.Be exactly because as shown in Figure 6 with the section shape of this axis hole 32a, formation makes the diameter of open side 32a bigger slightly than the diameter of gyroaxis 34, make the side of remaining silent form cone shape with tapering part 32c, this section shape as shown in Figure 6, become two equilateral triangles, the summit of two equilateral triangles is positioned on the centre of gyration axis of gyroaxis 34.
In addition, as shown in Figure 6, with the angle [alpha] on two equilateral triangle summits
2(with reference to Fig. 5) forms the cone angle alpha than bolster 24
1Big slightly.Be exactly in above-mentioned angle [alpha]
2And cone angle alpha
1Poor (the α of set angle between (with reference to Fig. 5)
2-α
1 ).Rotor core 37 with the coil 36 of having reeled on it is fixed on the gyroaxis 34 by insulating barrier 35, brush crimping cylindric commutator 37 thereon is fixed on the top of this rotor core 37.With the gyroaxis 34 of coaxial arrangement and magnet 40 by yoke 41 fixed configurations on the 1st stator case 42, make be positioned at rotor core 37 around.Yoke 41 and the 1st stator case 42 are formed one.
In taking the gyroaxis supporting construction that constitutes like this, when making rotor core 37 revolutions, gyroaxis 34 also becomes one and turns round.At this moment, the remain silent side 32c of the same magnetic attraction crimping because of magnet 40 with the 2nd embodiment of an end 34a of gyroaxis 34 with bearing portion 32 of the conical surface turns round.Just turn round when gyroaxis 34 carries out crimping with the line contact, make towards loosening minimizing radially owing to becoming.
As mentioned above, if according to the small DC motor that has of 1-the 3rd embodiment record, owing to when can do one's utmost to make the gap smaller of axle and bearing portion, make above-mentioned axle and contacting of bearing portion become line and contact, thereby armature is turned round smoothly, the noise of motor is reduced.
In addition, since coniform by commutator is formed, axial length and axial space were reduced, when motor noise is reduced than originally, can make small DC motor reach flattening, and can improve the assembleability that small DC motor is arranged.
Below, the embodiment that has small DC motor to be used for organ that will put down in writing among the above-mentioned 1-3 embodiment is described.
Such organ is called electronic organ, small DC motor is arranged as drive source above-mentioned, this drive source drives the organ of the revolution drum barrel that is used for springing vibration lobe by train of reduction gears.
In addition, the electronic organ that once disclosed on the real fair 1-21357 communique of Japan Patent of the applicant is with revolution drum barrel, vibration lobe, train of reduction gears and has small DC motor to be bearing in to become on the framework of electronic organ substrate.
The axle that constitutes each gear of train of reduction gears is fallen into switch-in part or bearing on the framework, but free rotaring ground supporting is on framework.As the small DC motor that has of drive source, by its base plate being fixed on the framework, making its rotation axis be parallel to framework and place with screw, just horizontal, be fixed on the framework.
Therefore, the above-mentioned small DC motor that has that is used for electronic organ, will be by this motor bedplate being fixed on framework with screw, just can be fixed on the framework, fall into switch-in part or bearing on the framework like this and only, just can finish the assembling of train of reduction gears and compare, have the assembling softening of small DC motor on framework tired, therefore, on the automatic assembling operation of electronic organ, have problems.
Therefore, the purpose of the 4th embodiment is to be provided as the electronic organ of eliminating the problems referred to above.
Among Fig. 8,50 is with the well-known revolution drum barrel of axle energy free rotaring ground supporting on the two ends of framework 51, sets up a plurality of pins according to the name of tune on the surface of this revolution drum barrel 50.In addition, it is relative to turn round drum barrel 50 therewith with screw 13, and has vibration lobe 52 predetermined distance, that can send beautiful sound and be fixed on the framework 11.This vibration lobe 52 comprises a plurality of lobes with 50 springing of revolution drum barrel.Drum barrel gear 54 is fixed on the end of revolution drum barrel 50, makes the most last gear 56 engagements of this drum barrel gear 54 and train of reduction gears 55.Train of reduction gears 55 comprises the worm gear 59 that gear 57 and gear 58 forms one, worm screw 60 and and worm screw 60 form the gear 61 of one.Make gear 61 and be arranged on the above-mentioned motor gear 71a engagement that has on the small DC motor armature 71.With each recess bearing 62,63 that falls into framework 51,64(is with reference to Figure 10 with its two ends for each gear 56,57,58 and 59) in mode support these gears.
Just as shown in figure 10, the open side of recess bearing 62,63,64 is made progress, with each gear 56,57,58, when the organ parts of 59 grades are assembled on framework 51,, just fall from illustrated top and can finish assembling operation by making above-mentioned each parts towards framework 51.
As shown in Figure 9, on framework 51, its other end is bearing on the lid 65 as the 2nd stator case with an end bearing of the axle of worm screw 60.In addition, there is small DC motor 66 to be configured in a jiao of framework 51 with above-mentioned.
There is small DC motor 66 to comprise yoke 67, is bearing in the pair of magnet 68,69 on the yoke 67, the brush (not shown) that has the armature 71 of commutator 70 and contact with commutator 70.
Form by yoke 67 is fallen on the framework 51, the about 3/4 recess 51a that surrounds around the yoke 67 can be fixed supporting yoke 67.In addition, will there be the base portion of the brush (not giving diagram) of small DC motor 66 to be fixed on the lid 65.Make the axle 72(of armature 71 in the 4th embodiment, be rotary type) vertically join with framework 51, and the same with train of reduction gears 55, by being fallen within the tubular bearing 73 that forms on the framework 51, axle 72 supports this axle.
The assembling of small DC motor 66 is arranged, fixing magnet 68 on the inner circumferential surface by making, 69 yoke 67 falls in the recess 51a of framework 51, secondly, the axle 72 of armature 71 is fallen in the bearing 73, at last, the lid 65 that will contain brush is topped on framework 51, brush can be contacted with commutator 70 carry out.
The bearing 73 and the framework 51 of motor are the branch complicated variants, form one but also can make with framework 51.
Below, with reference to accompanying drawing the present invention the 5th embodiment is described.
Among Figure 11, because the part of the organ mechanism except small DC motor is arranged is the same with the 4th embodiment, so it is not described.
This 5th embodiment uses coniform structure in the rectification sub-member of small DC motor is arranged, because the detailed description of this rectification sub-member is as putting down in writing among above-mentioned the 1st embodiment, so no longer describe.
Below, with reference to accompanying drawing the present invention the 6th embodiment is described.
Among Figure 12, because the part of the organ mechanism except small DC motor is arranged is the same with the 4th embodiment, so save to its explanation.
This 6th embodiment in the small DC motor rectification sub-member is arranged, uses the cone shape structure, and in addition, axle that will this rectification sub-member of supporting forms cone shape, its detailed description with in above-mentioned the 2nd embodiment, put down in writing the same, so save to its explanation.
Below, with reference to accompanying drawing the present invention the 7th embodiment is described.
Among Figure 13, owing to the organ mechanism of removing small DC motor is the same with the 4th embodiment, so no longer describe.
In the 7th embodiment, have the rectification sub-member of small DC motor to use the drum structure, the axle of this rectification sub-member of supporting is formed coniform, its detailed description with in above-mentioned the 3rd embodiment, put down in writing identical, the Therefore, omited illustrates it.
According to the above, owing to use the small DC motor that has shown in the above-mentioned 1-3 embodiment, and use the framework shown in the 4th embodiment, owing to make as the drive source of the revolution drum barrel that drives electronic organ above-mentioned small DC motor arranged, its axle vertically is supported facing to framework, can make above-mentionedly has small DC motor the same in the assembling of the assembling of framework and train of reduction gears, can finish above-mentioned assembling by axle is fallen within the bearing that forms on the framework.
Therefore, with screw motor bedplate is fixed on the motor assembling operation that carries out on the framework passing through up to now and improves, the problems referred to above on the automatic assembling operation of electronic organ are achieved a solution.
What in addition, the invention is not restricted to put down in writing in above-mentioned 1-7 embodiment has small DC motor or an electronic organ.
Claims (22)
1, small DC motor is arranged, comprise the stator department of magnet configuration on the 1st stator case, coil is wound on the rotor core with magnetic center, and be positioned to it is characterized in that described commutator is arranged on described rotor portions and turn round together with the rotor portions of the magnetic center staggered positions of above-mentioned magnet and rectification sub-member, brush and the 2nd stator case, form on the cone shape conus portion, described brush is contacted with above-mentioned commutator with authorized pressure, and be maintained on the 2nd stator case.
2, motor according to claim 1 is characterized in that having the bolster of supporting rotor portion, and the support of this bolster is arranged on the above-mentioned rectification sub-member.
3, motor according to claim 1, the pressure direction the when direction that staggers that it is characterized in that the magnetic center of the magnetic center of described magnet and rotor core contacts with commutator with authorized pressure with brush is opposite.
4, small DC motor is arranged, comprise the stator department of magnet configuration on the 1st stator case, coil is wound on the rotor core with magnetic center, and be positioned at the rotor portions on the magnetic center staggered positions with above-mentioned magnet, and rectification sub-member, brush and the 2nd stator case, it is characterized in that, commutator is arranged on described rotor portions turns round together, form on the cone shape conus portion, described brush is contacted with above-mentioned commutator with authorized pressure, and be maintained on the 2nd stator case, in addition, also comprise above-mentioned rotor portions and rectification sub-member are supported freely to rotate, the one end forms the bolster of cone shape, and will form the bearing portion that forms cone shape conus portion that has that an end of the bolster of cone shape conus portion supported.
5, motor according to claim 4 is characterized in that the cone angle alpha of the conus portion of described rectification sub-member
1Conus portion summit angle α with bearing portion
2The pass be α
1＜α
2
6, motor according to claim 4, the pressure direction the when direction that staggers that it is characterized in that the magnetic center of the magnetic center of described magnet and rotor core contacts with commutator with authorized pressure with brush is opposite.
7, motor according to claim 4, the conus portion of stagger direction and rectification sub-member that it is characterized in that the magnetic center of the magnetic center of described magnet and rotor core push bearing portion conus portion to push direction identical.
8, small DC motor is arranged, comprise the stator department of magnet configuration on the 1st stator case, be wound on coil on the rotor core with magnetic center and be positioned at rotor portions with the magnetic center staggered positions of above-mentioned magnet, and rectification sub-member, brush, bolster, bearing portion and the 2nd stator case, it is characterized in that being provided with and the rotating together commutator of this rotor portions and form rectification sub-member, form with authorized pressure and contact with above-mentioned commutator and form brush; Above-mentioned rotor portions and rectification sub-member are kept the rotating while of one, and the one end forms cone shape gyroaxis; Has the described bearing portion that forms cone shape conus portion for supporting the coniform end of forming of this gyroaxis; This bearing portion is set on described the 2nd stator case.
9, motor according to claim 8, stagger direction and the conus portion that makes rectification sub-member that it is characterized in that the magnetic center of the magnetic center of described magnet and rotor core push bearing portion conus portion to push direction identical.
10, motor according to claim 8 is characterized in that the cone angle alpha of the conus portion of described rectification sub-member
1With angle, the summit α that forms bearing portion conus portion
2The pass be α
1＜α
2
11, small DC motor is arranged, comprise the revolution drum barrel, oscillating plate, small-sized DC motor, and bolster and supporting frame is characterized in that according to song many pins being set forms described drum barrel; Drive the small DC motor that has of above-mentioned revolution drum barrel by train of reduction gears, with above-mentioned revolution drum barrel, oscillating plate, train of reduction gears and have small DC motor to be bearing on the described supporting frame makes the axle vertical handing-over of above-mentioned relatively frame of above-mentioned rotor portions that small DC motor arranged of supporting and rectification sub-member and has small DC motor to be bearing on the above-mentioned frame with above-mentioned.
12, motor according to claim 11 is characterized in that supporting and above-mentionedly has an end of the axle of small DC motor rotor portions and rectification sub-member to be supported by above-mentioned frame.
13, motor according to claim 11, it is characterized in that described motor comprises magnet is arranged on the 1st stator case forms stator department, coil is wound on the rotor core with magnetic center and is positioned at rotor portions with above-mentioned magnet magnetic center staggered positions, turn round together with this rotor portions, commutator is arranged on the rectification sub-member that forms on the cone shape conus portion, contact with above-mentioned commutator with authorized pressure, be maintained at the brush on the 2nd stator case.
14, motor according to claim 13 is characterized in that having the bolster of supporting rotor portion, and the bearing portion of this bolster is arranged on the above-mentioned rectification sub-member.
15, motor according to claim 13, the pressure direction the when direction that staggers that it is characterized in that the magnetic center of the magnetic center of described magnet and rotor core contacts with commutator with authorized pressure with brush is opposite.
16, motor according to claim 11, it is characterized in that described motor comprises the stator department of magnet configuration on the 1st stator case, coil is wound on the rotor core with magnetic core, and be positioned at the locational rotor portions that staggers with above-mentioned magnet magnetic center, commutator is arranged on this rotor portions turns round together, form the rectification sub-member on the cone shape conus portion, contact with above-mentioned commutator with authorized pressure, be maintained at the brush on the 2nd stator case, make above-mentioned rotor portions and the rectification sub-member can be supported freely to rotate, the one end is formed cone shape bolster, have and form cone shape conus portion, have the bearing portion that forms cone shape conus portion to what the cone shape end bearing of forming of this bolster was lived.
17, motor according to claim 16 is characterized in that the cone angle alpha of the conus portion of described rectification sub-member
1With the summit angle [alpha] that on the conus portion of bearing portion, forms
2The pass be α
1＜α
2
18, motor according to claim 16, the pressure direction the when direction that staggers that it is characterized in that the magnetic center of the magnetic center of described magnet and rotor core contacts with commutator with authorized pressure with brush is opposite.
19, motor according to claim 16, the conus portion of stagger direction and rectification sub-member that it is characterized in that the magnetic center of the magnetic center of described magnet and rotor core push bearing portion conus portion to push direction identical.
20, motor according to claim 11, it is characterized in that described motor comprises the stator department of magnet configuration on the 1st stator case, coil is wound on the rotor core with magnetic center, and be positioned at the rotor portions of the position of staggering with the magnetic center of above-mentioned magnet, commutator is arranged to and the rotating together rectification sub-member of this rotor portions, the brush that contacts with above-mentioned commutator with authorized pressure, keep above-mentioned rotor portions and rectification sub-member to be integral the rotating while, the one end is formed the gyroaxis of cone shape, has the cone shape conus portion of formation, with the bearing portion that the cone shape end bearing of the formation of this gyroaxis is lived, the 2nd stator case of this bearing portion is set with the cone shape conus portion of formation.
21, motor according to claim 20, the conus portion that it is characterized in that the stagger direction and the rectification sub-member at described magnet magnetic center and rotor core magnetic center push bearing portion conus portion to push direction identical.
22, motor according to claim 20 is characterized in that the cone angle alpha of the conus portion of described rectification sub-member
1With the summit angle [alpha] that on the conus portion of bearing portion, forms
2The pass be α
1＜α
2
Applications Claiming Priority (8)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP291431/92 | 1992-10-29 | ||
| JP04291431A JP3087798B2 (en) | 1992-10-29 | 1992-10-29 | Motor rotor support structure |
| JP04-291431 | 1992-10-29 | ||
| JP302382/92 | 1992-11-12 | ||
| JP04-302382 | 1992-11-12 | ||
| JP04-81148 | 1992-11-25 | ||
| JP8114892U JPH0643698U (en) | 1992-11-25 | 1992-11-25 | Electric music box |
| JP81148/92 | 1992-11-25 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1086641A true CN1086641A (en) | 1994-05-11 |
| CN1030127C CN1030127C (en) | 1995-10-18 |
Family
ID=26422190
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 93119703 Expired - Fee Related CN1030127C (en) | 1992-10-29 | 1993-10-29 | Small DC motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1030127C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7307368B2 (en) | 2000-06-09 | 2007-12-11 | Ricoh Company, Ltd. | DC motor |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108713095B (en) * | 2016-03-07 | 2021-06-04 | 日立汽车系统株式会社 | Starter motor |
-
1993
- 1993-10-29 CN CN 93119703 patent/CN1030127C/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7307368B2 (en) | 2000-06-09 | 2007-12-11 | Ricoh Company, Ltd. | DC motor |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1030127C (en) | 1995-10-18 |
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|---|---|---|---|
| C06 | Publication | ||
| C10 | Entry into substantive examination | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |