CN205178723U - Motor and possess refrigeration equipment of motor - Google Patents
Motor and possess refrigeration equipment of motor Download PDFInfo
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- CN205178723U CN205178723U CN201521042872.0U CN201521042872U CN205178723U CN 205178723 U CN205178723 U CN 205178723U CN 201521042872 U CN201521042872 U CN 201521042872U CN 205178723 U CN205178723 U CN 205178723U
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Abstract
The utility model provides a motor and possess refrigeration equipment of motor. The utility model relates to a motor of object possesses the moulded resin of stator, axle, rotor, the bearing as sintering porous bearings, casing and conduct resin portion. The rotor is located the position relative with the stator. Axle contracting contains sintering member and silicon oil, supports the rotation of axes freely. Bearing and axle are together by the casing of impressing. The bearing is at radial upper support axle.
Description
Technical field
The utility model relates to the motor used in the freezing equipments such as a kind of refrigerator, refrigerator-freezer, the motor particularly used in a kind of forced draft fan be installed in the case of freezing equipment.
Background technology
Food etc. is preserved in the accommodation space that the freezing equipment such as refrigerator, refrigerator-freezer has at freezing equipment.The food preserved etc. are cooled in accommodation space.In addition, in the following description, also sometimes the accommodation space that freezing equipment has is called in case.
In addition, for the forced draft fan used in case, sometimes use organic material etc.Gas is released sometimes from used organic material etc.In addition, in the following description, also the gas of releasing is called exhaust (outgas).In addition, also sometimes the forced draft fan used in case is called box fan.
When producing exhaust from box fan, damage the local flavor of the food be kept in case etc. sometimes.Therefore, require that box fan venting quality is low to reduce the gas of releasing.
In addition, be that the freezing equipment of representative operates all the time with refrigerator.Therefore, require that the box fan used in freezing equipment has the long driving life-span.
The driving life-span of structure member to box fan of the motor used in box fan has an impact.Particularly, the driving life-span of parts on box fan of the spinning movement of the supporting motor in the structure member of motor produces large impact.The slipper of bearing and axle has much relations with the spinning movement of motor.In order to carry out sliding action swimmingly, the slipper to bearing and axle provides lubricating oil.Therefore, lubricating oil also produces large impact to the driving life-span of box fan.
In the past, require that the motor cost that uses in the box fan of DC driven is low and there is the long driving life-span.Therefore, sliding bearing is used in the motor used in the box fan of DC driven.Particularly, as sliding bearing, be mostly used in bearing and include the sintered metal bearing being soaked with lubricating oil.
In addition, when the lubricating oil used within the bearing reduces due to long-standing driving, between bearing and axle, there is Metal Contact.When there is Metal Contact between bearing and axle, box fan can produce abnormal sound sometimes.Or when there is Metal Contact between bearing and axle, axle and bearing can burn and stick together sometimes.When axle and bearing burn stick together time, box fan stop.When producing these undesirable conditions, box fan has been arrived the life-span.
Therefore, for the motor used in box fan, the recoverable amount managing to increase lubricating oil carrys out life-saving.That is, in the motor, guarantee in the inside of motor that large space is to install the felt (felt) of impregnation lubricating oil.Be installed in around bearing containing the felt being soaked with lubricating oil.
Figure 30 is the sectional view of the motor represented in the past.
As shown in figure 30, the motor 120 disclosed in Japanese patent application Japanese Unexamined Patent Publication 2012-253985 publication possesses the holding unit 104 of stator 101, rotor 102, the holding unit 103 of output shaft side and the opposition side of output shaft side.
The holding unit 103 of output shaft side keeps rotor 102.Housing 115 is pressed into end cover 111 to form holding unit 103.Bearing 112 is comprised, as elastomeric spring 113 and felt 114 with the inside of housing 115 at end cover 111.Bearing 112 supporting rotor 102.Spring 113 keeps bearing 112.Felt 114 comprises lubricating oil.The friction that lubricating oil minimizing bearing 112 and rotor 102 produce when sliding between bearing 112 and rotor 102.
The holding unit 104 of the opposition side of output shaft side is identical with holding unit 103 structure, also has thrust plate 116.Thrust plate 116 is supporting rotor 102, i.e. supporting rotor 102 in thrust direction in the axial direction.
In addition, in Japanese patent application Japanese Unexamined Patent Publication 10-178758 publication, the motor not using felt is disclosed.Motor shown in patent documentation 2 is the outer rotor type motor that rotor is positioned at than stator position in the outer part.
In addition, in the following description, also sometimes Japanese patent application Japanese Unexamined Patent Publication 2012-253985 publication is called patent documentation 1.In addition, also sometimes Japanese patent application Japanese Unexamined Patent Publication 10-178758 publication is called patent documentation 2.
Utility model content
The utility model as the electric tools of object for stator, axle, rotor, sintered metal bearing, housing and resin portion.
Stator has stator core and stator winding.Stator winding is wound in stator core.
Axle is axle center with pivot, and axis direction extends.
Rotor is positioned at and stator position in opposite directions.Rotor is installed on axle.Rotor has plane and side.Plane extends on the direction intersected with axle center.Side comprises magnetic component.Side extends along axle center in the plane.
Sintered metal bearing comprises sintered component and silicone oil, is rotatably supported by axle.Sintered metal bearing has outer peripheral face, inner peripheral surface and the first end face.Outer peripheral face is positioned at the position in the face of side.Outer peripheral face is formed along axle center.Inner peripheral surface is positioned at than the position of outer peripheral face near axle side.Inner peripheral surface is formed along axle center.Inner peripheral surface comprises multiple with the tactile sliding contacting part that is coupling in its surface.Outer peripheral face is connected with inner peripheral surface by the first end face.First end face is positioned at the end of the side of sintered metal bearing on axis direction.
Housing has peristome and cylindrical portion.Opening is in the side of housing on axis direction.Cylindrical portion comprises the inner surface in the face of outer peripheral face and the first end face.Cylindrical portion extends along axle center.
Resin portion keeps stator and housing.
First method of the present utility model relates to a kind of motor, possesses:
Stator, it has stator core and is wound in the stator winding of described stator core;
Axle, it is axle center with pivot, and axis direction extends;
Rotor, it is positioned at described stator position in opposite directions and is installed on described axle, and this rotor has plane and side, and described plane extends on the direction intersected with described axle center, and described side comprises magnetic component, extends on the plane along described axle center;
Sintered metal bearing, it comprises sintered component and silicone oil, described axle is rotatably supported, this sintered metal bearing has outer peripheral face, inner peripheral surface and the first end face, described outer peripheral face is positioned at the position in the face of described side and is formed along described axle center, described inner peripheral surface is positioned at and is formed along described axle center near the position of described axle side than described outer peripheral face, the surface of this inner peripheral surface comprises the multiple and described tactile sliding contacting part that is coupling, described outer peripheral face is connected with described inner peripheral surface by described first end face, be positioned at the end of the side of described sintered metal bearing on described axis direction,
Housing, it has peristome and cylindrical portion, and described opening is in the side of described housing on described axis direction, and described cylindrical portion comprises the inner surface in the face of described outer peripheral face and described first end face, and extends along described axle center; And
Resin portion, it keeps described stator and described housing.
Second method of the present utility model is in the motor of first method, and when ambient temperature is 25 DEG C, described silicon oil viscosity is in the scope of 35mPas to 70mPas.
Third Way of the present utility model is in the motor of second method, described silicon oil viscosity being set to η, the rotating speed of described axle being set to n, described axle is set to P to described sintered metal bearing applied pressure, the radius of described axle is set to r, the radius of described sintered metal bearing is set to R, when the one-sided gap produced between described axle and described sintered metal bearing is set to c, the Sommerfeld number S of the described sintered metal bearing calculated by S=(η n/P) × (r/c) 2 is in the scope of 40 to 80, wherein, c=R-r.
Fourth way of the present utility model is in the motor of first method, described rotor also has the protuberance of more than one ring-type centered by described axle center in the described plane being formed with described side, and described protuberance is the projection along described axis direction in the cross section comprising described axle center.
5th mode of the present utility model is in the motor of fourth way, when having the protuberance of plural ring-type centered by described axle center, in the described plane being formed with described side, the internal diameter centered by described axle center of protuberance described in each is different.
6th mode of the present utility model is in the motor of fourth way, and when having the protuberance of plural ring-type centered by described axle center, in the cross section comprising described axle center, the height from described plane of protuberance described in each is different.
7th mode of the present utility model is in the motor of first method, described rotor also has the recess of more than one ring-type centered by described axle center in the described plane being formed with described side, and described recess is the depression along described axis direction in the cross section comprising described axle center.
Eighth mode of the present utility model is in the motor of the 7th mode, when having the recess of plural ring-type centered by described axle center, in the described plane being formed with described side, the internal diameter centered by described axle center of recess described in each is different.
9th mode of the present utility model is in the motor of the 7th mode, and when having the recess of plural ring-type centered by described axle center, in the cross section comprising described axle center, the degree of depth from described plane of recess described in each is different.
Tenth mode of the present utility model is in the motor of fourth way, and described resin portion also has concavity stage portion on the face in the face of described plane, and the protuberance that described concavity stage portion and described plane have becomes depression opposite to each other.
11 mode of the present utility model is in the motor of the 7th mode, and described resin portion also has convex stage portion on the face in the face of described plane, and the recess that described convex stage portion and described plane have becomes protruding opposite to each other.
12 mode of the present utility model is in the motor of fourth way, what described rotor also had ring-type centered by described axle center on the plane hates oily portion, describedly hate oily portion to be positioned at than the position of described protuberance near described side, and keep oleophobic agent.
13 mode of the present utility model is in the motor of the 7th mode, what described rotor also had ring-type centered by described axle center on the plane hates oily portion, describedly hate oily portion to be positioned at than the position of described recess near described side, and keep oleophobic agent.
14 mode of the present utility model is in the motor of first method, distance between the second end face described plane and described sintered metal bearing the had distance be set between A1, the described peristome that described plane and described housing had is set to A2, by described side and when keeping the distance between the surface of the described resin portion of described housing to be set to A3, described A1, A2, A3 of described rotor are below 1mm, and wherein said second end face is positioned at described plane position in opposite directions and is positioned at the side contrary with described first end face.
15 mode of the present utility model is in the motor of first method, described sintered component comprise with iron be principal component powder and cover the overlay film component comprising copper of described powder.
Another way of the present utility model relates to a kind of freezing equipment, possesses: forced draft fan, its impeller having the motor according to first method and be installed on described axle; And control part, it drives described forced draft fan.
By this structure, reduce the air displacement produced from motor, suppress the impact on the food be kept in case etc.
Accompanying drawing explanation
Fig. 1 is the sectional view of the motor in execution mode 1 of the present utility model.
Fig. 2 observes the synoptic diagram that the rotor that uses in the motor in execution mode 1 of the present utility model obtains in FIG from below.
Fig. 3 observes the major part enlarged drawing that the rotor that uses in the motor in execution mode 1 of the present utility model obtains in FIG from below.
Fig. 4 observes the major part enlarged drawing that other rotor of using in the motor in execution mode 1 of the present utility model obtains in FIG from below.
Fig. 5 observes the major part enlarged drawing that other rotor of using in the motor in execution mode 1 of the present utility model obtains in FIG from below.
Fig. 6 is the major part enlarged drawing of the major part that the rotor used in the motor in execution mode 1 of the present utility model is described.
Fig. 7 observes the major part enlarged drawing that the rotor that uses in the motor in execution mode 1 of the present utility model obtains in FIG from below.
Fig. 8 is the major part enlarged drawing of the major part that other rotor used in the motor in execution mode 1 of the present utility model is described.
Fig. 9 observes the major part enlarged drawing that other rotor of using in the motor in execution mode 1 of the present utility model obtains in FIG from below.
Figure 10 is the major part enlarged drawing of the major part that other rotor used in the motor in execution mode 1 of the present utility model is described.
Figure 11 is the major part enlarged drawing of the major part that other rotor used in the motor in execution mode 1 of the present utility model is described.
Figure 12 is the main portion sectional view of other motor in execution mode 1 of the present utility model.
Figure 13 is the sectional view of other motor in execution mode 1 of the present utility model.
Figure 14 is the sectional view of the motor in execution mode 2 of the present utility model.
Figure 15 observes the synoptic diagram that the rotor that uses in the motor in execution mode 2 of the present utility model obtains in fig. 14 from below.
Figure 16 observes the major part enlarged drawing that the rotor that uses in the motor in execution mode 2 of the present utility model obtains in fig. 14 from below.
Figure 17 observes the major part enlarged drawing that other rotor of using in the motor in execution mode 2 of the present utility model obtains in fig. 14 from below.
Figure 18 observes the major part enlarged drawing that other rotor of using in the motor in execution mode 2 of the present utility model obtains in fig. 14 from below.
Figure 19 is the major part enlarged drawing of the major part that the rotor used in the motor in execution mode 2 of the present utility model is described.
Figure 20 observes the major part enlarged drawing that the rotor that uses in the motor in execution mode 2 of the present utility model obtains in fig. 14 from below.
Figure 21 is the major part enlarged drawing of the major part that other rotor used in the motor in execution mode 2 of the present utility model is described.
Figure 22 observes the major part enlarged drawing that other rotor of using in the motor in execution mode 2 of the present utility model obtains in fig. 14 from below.
Figure 23 is the major part enlarged drawing of the major part that other rotor used in the motor in execution mode 2 of the present utility model is described.
Figure 24 is the major part enlarged drawing of the major part that other rotor used in the motor in execution mode 2 of the present utility model is described.
Figure 25 is the main portion sectional view of other motor in execution mode 2 of the present utility model.
Figure 26 is the major part enlarged drawing of the major part that the rotor used in the motor in execution mode 3 of the present utility model is described.
Figure 27 is the major part enlarged drawing of the major part that other rotor used in the motor in execution mode 3 of the present utility model is described.
Figure 28 is the major part enlarged drawing of the major part that other rotor used in the motor in execution mode 3 of the present utility model is described.
Figure 29 is the key diagram of the freezing equipment represented in execution mode 4 of the present utility model.
Figure 30 is the sectional view of the motor represented in the past.
Embodiment
Motor in each execution mode of the present utility model, by structure described later, reduces the air displacement produced from motor, suppresses the impact on the food be kept in case.
In addition, the motor in each execution mode of the present utility model is by structure described later, and efficiency Gao Bingneng accesses the long driving life-span.
And the motor as execution mode of the present utility model can realize the miniaturization of motor body.
That is, there is the following point that should improve in motor in the past.That is, synthetic hydrocarbon oil is used as base oil by the lubricating oil used in motor in the past.Therefore, when the lubricating oil evaporated is diffused in case from motor in the past, infringement is kept at the local flavor etc. of the food in case sometimes.
In addition, as shown in figure 30, constructively, the bearing 112 of motor 120 is in the past installed on the position close with the space outerpace of motor 120.And, in motor 120 in the past, in the mode of surrounding bearing 112, the felt 114 containing being soaked with lubricating oil is installed.Motor 120 in the past uses felt 114 in motor 120, guarantee the lubricating oil of sufficient amount.
In other words, about motor 120 in the past, in motor 120, there is a large amount of lubricating oil, be therefore vented quantitative change many.If exhaust quantitative change is many, then the possibility of the motor 120 in the past local flavor of infringement food etc. further uprises.
In addition, the synthetic hydrocarbon oil used in motor 120 in the past comprises polyalphaolefin, ester system, ether system, mineral oil system etc.Ester system comprises diester, polyol ester etc.Ether system comprises alkyl diphenyl ether etc.
In addition, in motor 120 in the past, also contemplate lubricating oil silicone oil being used as bearing 112.When silicone oil and synthetic hydrocarbon oil being compared, compared with silicone oil, synthetic hydrocarbon oil has the fragrance of organic solvent system.Therefore, compared with synthetic hydrocarbon oil, if use silicone oil, then the local flavor of food can be damaged less.
But, under the lubrication oil condition that silicone oil is used as bearing 112, there is the silicone oil be diffused in case and dysgenic worry is produced to electrical contact portions such as the door switch that freezing equipment has.
And when silicone oil and synthetic hydrocarbon oil being compared, compared with synthetic hydrocarbon oil, the greasy property of silicone oil is poor.Therefore, under the lubrication oil condition that silicone oil is used as bearing 112, think that the abrasion of bearing portions can increase when bearing portions carries out spinning movement.
According to above-mentioned reason, be difficult to the lubricating oil adopting silicone oil as bearing 112.
Then, due to following reason, the motor of the outer-rotor type disclosed in patent documentation 2 is unsuitable for using in freezing equipment.
That is, in general, in freezing equipment, the mode that the shell of the motor had to make box fan is fixed in case uses box fan.In the mode of the axis direction clamping shell along the axle included by motor, motor is fixed in case.
On the other hand, in the motor of outer-rotor type, the shell of motor rotates together with the axle included by motor.
Therefore, the shell of motor carries out the motor of the outer-rotor type rotated and the shell being not suitable as motor is fixed on the motor of the box fan in case.
In addition, the motor of the outer-rotor type disclosed in patent documentation 2 is mainly used in cooling information equipment.
In addition, the motor of outer-rotor type is unsuitable for the purposes in the driving life-span will rectificated as freezing equipment.
Therefore, the motor in each execution mode of the present utility model is sought to reduce the air displacement produced from motor, to suppress the impact on the food be kept in case.
In addition, the motor in each execution mode of the present utility model is to guarantee for the purpose of the high efficiency of box fan and miniaturized and long service life and high reliability.
Below, with reference to accompanying drawing and Biao Lai, execution mode of the present utility model is described.In addition, execution mode is below a specific implementation example of the present utility model, not for limiting technical scope of the present utility model.
In addition, in the following description, the motor of the drive source as the box fan used in freezing equipment is exemplified.Box fan forcibly makes circulating cold air in the case of the refrigerator, refrigerator-freezer etc. as freezing equipment.
(execution mode 1)
Fig. 1 is the sectional view of the motor in execution mode 1 of the present utility model.Fig. 2 observes the synoptic diagram that the rotor that uses in the motor in execution mode 1 of the present utility model obtains in FIG from below.
Fig. 3 to Fig. 5 observes the major part enlarged drawing that the rotor that uses in the motor in execution mode 1 of the present utility model obtains in FIG from below.
Fig. 6, Fig. 8 are the major part enlarged drawing of the major part that the rotor used in the motor in execution mode 1 of the present utility model is described respectively.
Fig. 7, Fig. 9 observe the major part enlarged drawing that the rotor that uses in the motor in execution mode 1 of the present utility model obtains in FIG from below.
Figure 10, Figure 11 are the major part enlarged drawing of the major part that other rotor used in the motor in execution mode 1 of the present utility model is described respectively.
Figure 12 is the main portion sectional view of other motor in execution mode 1 of the present utility model.Figure 13 is the sectional view of other motor in execution mode 1 of the present utility model.
As shown in Figure 1, the motor 20 in execution mode 1 of the present utility model possesses stator 4, axle 5, rotor 7, bearing 8, housing 10 and the moulded resin 11 as resin portion as sintered metal bearing.
Stator 4 has stator core 1 and stator winding 3.Stator winding 3 is wound in stator core 1.
Axle 5, for axle center 5a axis direction extends with pivot 7a.
Rotor 7 is positioned at and stator 4 position in opposite directions.Rotor 7 is installed on axle 5.Rotor 7 has plane 7b and side 7c.Plane 7b extends on the direction intersected with axle center 5a.Side 7c comprises magnetic component.Side 7c extends along axle center 5a on plane 7b.
Bearing 8 as sintered metal bearing comprises sintered component 24 and silicone oil 24c, is rotatably supported by axle 5.Bearing 8 as sintered metal bearing has outer peripheral face 8c, inner peripheral surface 8d and the first end face 8e.Outer peripheral face 8c is positioned at the position in the face of side 7c.Outer peripheral face 8c is formed along axle center 5a.Inner peripheral surface 8d is positioned at than the position of outer peripheral face 8c near axle 5 side.Inner peripheral surface 8d is formed along axle center 5a.Inner peripheral surface 8d comprises the first sliding contacting part 8a as multiple sliding contacting part contacted with axle 5 and the second sliding contacting part 8b in its surface.Outer peripheral face 8c is connected with inner peripheral surface 8d by the first end face 8e.First end face 8e is positioned at the end of the side of bearing 8 on 5a direction, axle center.
Housing 10 has peristome 10a and cylindrical portion 10b.Peristome 10a is positioned at the side of housing 10 on 5a direction, axle center.Cylindrical portion 10b comprises the inner surface 10c in the face of outer peripheral face 8c and the first end face 8e.Cylindrical portion 10b extends along axle center 5a.
Moulded resin 11 as resin portion keeps stator 4 and housing 10.
The structure playing remarkable effect effect is especially as follows.In addition, in a part of accompanying drawing, the record eliminating oleophobic agent 25 sees accompanying drawing to facilitate.
That is, as shown in Figure 1, in motor 20, viscosity when ambient temperature is 25 DEG C can be used in and be in the silicone oil 24c of the scope of 35mPas to 70mPas.
In addition, in motor 20, the bearing 8 of sintered metal bearing can be used as in the scope of the Sommerfeld number S calculated by formula 2 described later.Sommerfeld number S represents the lubricating status of bearing 8.
That is, η is the viscosity of silicone oil 24c.N is the rotating speed of axle 5.P is that axle 5 is to bearing 8 applied pressure as sintered metal bearing.R is the radius of axle 5.R is the radius of the bearing 8 as sintered metal bearing.C is the one-sided gap produced between axle 5 and bearing 8.
Now, one-sided gap c is calculated by formula (1) below.
c＝R-r···(1)
Now, Sommerfeld number S is calculated by formula (2) below.
S＝(ηn/P)×(r/c)
2···(2)
Particularly, effective scope to be Sommerfeld number S be 40 to 80 scope.
In addition, as shown in Figure 1 and Figure 2, in motor 20, rotor 7 also has more than one protuberance 21 on plane 7b.Plane 7b is formed side 7c.Protuberance 21 is the projection along 5a direction, axle center in the cross section comprising axle center 5a.Protuberance 21 is the ring-types centered by the 5a of axle center.
In addition, as shown in Figures 3 to 5, protuberance also can realize with shape below.That is, as shown in Figure 3, protuberance 21a also can realize with the ring-type of ellipse.As shown in Figure 4, protuberance 21b also can realize with hexagonal ring-type.In addition, protuberance 21b also can realize with polygonal ring-type.As shown in Figure 5, protuberance 21c also can realize with the ring-type comprising groove portion 22.
In addition, as shown in Figure 6, Figure 7, motor has protuberance 21, the 21d of plural ring-type centered by the 5a of axle center sometimes.In this case, on the plane 7b being formed with side 7c, the internal diameter centered by the 5a of axle center of each protuberance 21,21d is different.
In addition, as shown in Fig. 8 to Figure 10, motor has protuberance 21e, 21f of plural ring-type centered by the 5a of axle center sometimes.In this case, in the cross section comprising axle center 5a, the height from plane 7b of each protuberance 21e, 21f is different.
Specifically, as shown in Figure 8, Figure 9, protuberance 21e, 21f can be formed integrally as stepped.Or as shown in Figure 10, protuberance 21e, 21f can be formed independently of one another.
Further, as shown in figure 11, what protuberance 21e, 21f, 21g can be formed as from 7c side, axle 5 side direction side height step-down is stepped.Or, protuberance can be formed as from 7c side, axle 5 side direction side height uprise stepped.
In addition, as shown in figure 12, in motor 20, the moulded resin 11 as resin portion also has concavity stage portion 11b in the face 11a in the face of plane 7b, and the protuberance 21d that this concavity stage portion 11b and plane 7b has becomes depression opposite to each other.
In addition, as shown in Figure 1, in motor 20, rotor 7 has hates oily portion 23.On plane 7b, oily portion 23 is hated to be positioned at than the position of protuberance 21 near 7c side, side.Oily portion 23 is hated to keep oleophobic agent 25.Oily portion 23 is hated to be ring-types centered by the 5a of axle center.
In addition, as shown in Figure 1, the second end face 8f is positioned at the side contrary with the first end face 8e that the bearing 8 as sintered metal bearing has.About motor 20, plane 7b and the distance between the second end face 8f of isoplanar 7b position are in opposite directions set to A1.About motor 20, the distance between the peristome 10a have plane 7b and housing 10 is set to A2.About motor 20, the distance between side 7c and the maintenance resin portion of housing 10 and the surperficial 11c of moulded resin 11 is set to A3.
Now, the distance A1 of rotor 7, A2, A3 are below 1mm.
In addition, as shown in Figure 1, in motor 20, sintered component 24 comprises powder 24a and overlay film component 24b.Powder 24a take iron as principal component.Overlay film component 24b covers powder.Overlay film component 24b comprises copper.
Re-use accompanying drawing to describe in detail.
As shown in Figure 1, stator 4 has insulator 2 between stator core 1 and stator winding 3.Stator core 1 and stator winding 3 phase insulate by insulator 2.Stator core 1 is wound with stator winding 3.
Rotor 7 is inserted into the inner side of stator 4.The rotor 7 of motor 20 is positioned at the inner side of stator 4 and rotates.Motor 20 is also referred to as inner-rotor type motor.
Rotor 7 has the magnet 6 comprising ferrite resin as permanent magnet.Axle 5 is installed on magnet 6 in the mode of the central authorities of running through magnet 6.Axle 5 is pressed into housing 10 together with the bearing 8 as sintered metal bearing.Housing 10 is formed by metal material.Bearing 8 has the first sliding contacting part 8a and the second sliding contacting part 8b in the inner side contacted with axle 5.By bearing 8 bolster 5 diametrically.By the thrust load of thrust plate 9 bolster 5.Containing being soaked with silicone oil 24c as lubricating oil in bearing 8.Silicone oil 24c as lubricating oil prevents the Metal Contact of axle 5 and bearing 8.In present embodiment 1, can be used in viscosity when ambient temperature is 25 DEG C is the silicone oil 24c of 35mPa.
Further, be built-in with circuit layout card 14 in motor 20, this circuit layout card 14 is provided with the drive circuit comprising control circuit.Circuit layout card 14 is connected with lead-in wire 13a etc. via connector 13.Circuit layout card 14 via lead-in wire 13a from the input of the outside of motor 20 or outside output supply voltage, control signal etc. to motor 20.
The stator 4 of the motor 20 in present embodiment 1, housing 10, circuit layout card 14, connector 13 are one-body molded by moulded resin 11.
Housing 10 is the cup-shaped of the cylindrical shape forming hollow.The inner circumferential footpath of housing 10 is less than the footpath, periphery of bearing 8.Therefore, if bearing 8 is pressed into housing 10, then pass through bearing 8 bolster 5 diametrically by housing 10.Axle 5 is also molded resin 11 by housing 10 and supports.
Further, rotor 7 is inserted into the inner circumferential side of moulded resin 11.In addition, housing 12 is pressed into moulded resin 11.
The resin material forming moulded resin 11 suitably can be selected from the unsaturated polyester (UP) system resin, phenol resin, epoxy system resin etc. of thermosetting resin.In addition, the resin material forming moulded resin 11 suitably can also be selected from the PET series resin of thermoplastic resin, polybutylene terephthalate (PBT) system resin etc.Moulded resin 11 in present embodiment 1 have selected the unsaturated polyester resin of thermosetting resin.
Above-mentioned motor 20 can be used in box fan.The circuit layout card 14 had via connector 13 pairs of motor 20 provides supply voltage and control signal etc.Drive current is provided to stator winding 3 from the drive circuit being installed on circuit layout card 14.When driving a current through stator winding 3, in stator core 1, produce magnetic field.
The magnetic field produced from stator core 1 attracts mutually with the magnetic field produced from magnet 6 or repels mutually, the spinning movement that it is pivot that rotor 7 carries out with axle 5 thus.
Magnet 6 and the axle 5 of the motor 20 in present embodiment 1 are integrated.If be set to this structure, then the silicone oil 24c that comprises in bearing 8 can be prevented via the outside leaking into motor 20 between the outer diameter face 5b of axle 5 and the aperture surface 6b of magnet 6.
Silicone oil 24c can use silicon system oil.In addition, if same action effect can be obtained, then other oil can also be used.
Magnet 6 is the cup-shaped of the periphery surrounding bearing 8.Magnet 6 is formed with stair-stepping step at internal side diameter.
Moulded resin 11 covers the periphery being pressed into the housing 10 of bearing 8.The stair-stepping step formed in magnet 6 and the surperficial 11c of moulded resin 11 are in opposite directions.
In addition, forming the side 7c of magnet 6 of cup-shaped and the clearance distance A3 of the surperficial 11c of moulded resin 11 is 1mm.
If be set to this structure, then the major part of the spinning movement comprising bearing 8 can be suppressed to contact with the outside atmosphere of surrounding motor 20.
That is, the major part comprising the spinning movement of bearing 8 significantly contacts with the outside atmosphere of motor 20 with gap formed by magnet 6 round at moulded resin 11.Moulded resin 11 is subjected to gap formed by magnet 6 and repeatedly bends, and is formed with the width of 1mm.Therefore, moulded resin 11 and gap formed by magnet 6 become the structure of the circulation hindering air.
Thus, even if make the silicone oil 24c comprised in bearing 8 become steam because rotor 7 rotates, the silicone oil becoming steam also can stay bearing 8 around.That is, the silicone oil 24c comprised in bearing 8 is difficult to evaporation.Its result, the motor 20 in present embodiment 1 can obtain the long driving life-span.
In addition, bearing 8 is formed by the sintered component 24 iron powder being covered to copper film.
In the past, required that the motor used in the inside of refrigerator was corrosion-resistant.Therefore, motor in the past take copper powder as sintered component.Thus, bearing does not in the past have magnetic.Its result, in motor in the past, the magnetic attraction of thrust direction only produces between magnet and stator core.
But the bearing 8 used in the motor 20 in present embodiment 1 is formed by powder sintering iron powder being covered to copper.Therefore, bearing 8 can have magnetic while guaranteeing corrosion resistance.
According to this structure, the component magnetic by tool, that be formed as cup-shaped magnet 6, bearing 8 and the metal housing 10 that form the rotor of broad sense are formed.Therefore, compared with motor in the past, the rotor of broad sense can produce stronger magnetic attraction.
Thus, about the motor 20 in present embodiment 1, even if motor 20 is installed into the downward posture of axle 5 vertical, bearing 8 also can not contact with magnet 6.Therefore, the motor 20 in present embodiment 1 can prevent reliability from reducing.
In addition, magnet 6 is cup-shaped.Therefore, even if when the posture downward with axle 5 vertical drives motor 20, silicone oil also can be suppressed to leak into the outside of motor 20.Thus, even if the receiving room etc. that will the box fan of motor 20 used to be installed on refrigerator, also receiving room of making dirty can be prevented.Food etc. is preserved, therefore, it is possible to maintain the state of health in receiving room.
In addition, as shown in Figure 1, the plane 7b of the bottom of the cup-shaped of formation magnet 6 is formed with the protuberance 21 as rib.Oleophobic agent 25 is coated with at the hating in oily portion 23 of outer circumferential side being positioned at protuberance 21.
If be set to this structure, even if then when the posture downward with axle 5 vertical drives motor 20, the silicone oil 24c comprised in bearing 8 also can stay the inner circumferential side of protuberance 21.That is, can prevent the silicone oil 24c comprised in bearing 8 from flowing to the 7c face, side of magnet 6.Therefore, the motor 20 in present embodiment 1 can suppress the leakage of the silicone oil 24c comprised in bearing 8 further.
Its result, the motor 20 in present embodiment 1 can obtain the long driving life-span further.
In addition, when being coated with oleophobic agent 25 to magnet 6, protuberance 21 can prevent oleophobic agent 25 from moving to axle 5 effluent.Therefore, protuberance 21 is to determining that in the operation of coating oleophobic agent 25 position of coating oleophobic agent 25 is also effective.
At this, describe the slipper centered by bearing in detail.In addition, in explanation described later, numerical value when oil body and Sommerfeld number represent that ambient temperature is 25 DEG C.
As shown in figure 30, motor 120 in the past has pair of bearings 112.The bearing 112 of one side is positioned at output shaft side.The bearing 112 of the opposing party is positioned at the opposition side of output shaft side.In motor 120, axle support by pair of bearings 112.
About the lubricating oil that motor 120 has, use the lubricating oil that viscosity is below 20mPa.In addition, about the bearing 112 in motor 120, in order to cut down the power consumption of motor 120, use Sommerfeld number S lower than the bearing in the scope of 40.
As shown in Figure 1, in the motor 20 in present embodiment 1, bearing 8 is integrally formed along axle 5.Bearing 8 comprises the first sliding contacting part 8a as multiple sliding contacting part and the second sliding contacting part 8b on the face that bearing 8 contacts with axle 5.If be set to this structure, then when utilizing bearing 8 to carry out the spinning movement of bolster 5, the axiality of bearing 8 uprises.Therefore, motor 20 can suppress the slip loss that bearing 8 place produces.Thus, motor 20 can suppress power consumption.
Its result, even if Sommerfeld number S is more than 40, motor 20 also can reduce power consumption.
In addition, represent that the value of the Sommerfeld number S of the lubricating status of bearing is larger, then fluid lubrication is higher.Therefore, if the value of Sommerfeld number S becomes large, then the thickness of the oil film produced between bearing 8 and axle 5 can be made thickening.
Compared with the synthetic hydrocarbon oil used in motor 120 in the past, the sliding of the silicone oil 24c used in the motor 20 in present embodiment 1 is poor.But if Sommerfeld number S is the silicone oil 24c of more than 40, then motor 20 can guarantee the abrasion performance required by bearing 8.Therefore, the motor 20 in present embodiment 1 can obtain the bearing 8 with the longer driving life-span.
In addition, about the silicone oil 24c used in the motor 20 in present embodiment 1, the higher limit of Sommerfeld number S is 80.When the value of Sommerfeld number S is more than 80, the slip loss of bearing 8 increases.Therefore, the power consumption of motor 20 becomes large.
That is, in the motor 20 in present embodiment 1, the scope of optimal Sommerfeld number S is 40 to 80.
In motor 20, use the silicone oil 24c that viscosity is 35mPa to 70mPa, to make the value of Sommerfeld number S for 40 to 80.In motor 20 in present embodiment 1, the lubricating oil that the oil body of use in ratio of viscosities motor 120 is in the past high can be used.
The result will compared as the motor 20 in the present embodiment 1 of an example with the motor 120 in the past shown in Figure 30 is shown below.
In addition, as mentioned above, if the formula of use (1), the Sommerfeld number S of the lubricating status representing bearing can be obtained.
(embodiment 1)
The motor 20 forming said structure is used to carry out long duration test.
It is the silicone oil 24c of 35mPa that motor 20 in present embodiment 1 is used in viscosity when ambient temperature is 25 DEG C.When using this silicone oil 24c, according to above-mentioned formula (1), when ambient temperature is 25 DEG C, Sommerfeld number S is 40.
The condition of long duration test is as follows.That is, drive motor 20 under the ambient temperature of 25 DEG C.With the rotating speed drive motor 20 of 3500r/m.Motor 20 is driven 5000 hours.
The project measured is the abrasion loss ratio of gross exhaust gas ratio and bearing.
The ratio of the lubricants capacity that the motor before lubricants capacity residual in the motor after gross exhaust gas ratio refers to long duration test and long duration test has.Such as, when gross exhaust gas ratio is 100, represent that the lubricants capacity had at the front and back motor of long duration test does not change.In addition, when gross exhaust gas ratio is 50, represent that the lubricants capacity had at the front and back motor of long duration test reduces by half.
The abrasion loss ratio of bearing refers to the ratio of the amount of the bearing worn away in the front and back of long duration test.Such as, when the abrasion loss ratio of bearing is 100, represent that the bearing had at the front and back motor of long duration test does not produce abrasion.In addition, when the abrasion loss ratio of bearing is 50, represent that the bearing wear had at the front and back motor of long duration test is to becoming half.
Measure and all carry out with weight ratio.That is, for gross exhaust gas ratio, be measure the weight being present in the lubricating oil of the inside of motor in the front and back of long duration test.In addition, for the abrasion loss ratio of bearing, be the weight measuring bearing in the front and back of long duration test.
The result of long duration test is recorded in Table 1 as embodiment 1.
(comparative example 1)
As shown in figure 30, as comparative example 1, employ the motor 120 disclosed in patent documentation 1.The material of the material of bearing 112 used in motor 120, the material of moulded resin, magnet, oleophobic agent, axle and thrust plate 116 are identical with embodiment 1.It is the synthetic hydrocarbon oil of 15mPa that motor 120 employs the viscosity when ambient temperature is 25 DEG C.When using this synthetic hydrocarbon oil, according to above-mentioned formula (1), Sommerfeld number S when ambient temperature is 25 DEG C is 35.
About the condition of long duration test, carry out under the same conditions as example 1.The result of long duration test is recorded in Table 1 as comparative example 1.
[table 1]
As shown in table 1, in embodiment 1, the gross exhaust gas of the front and back of long duration test is 100%.That is, in embodiment 1, the lubricants capacity of the front and back of long duration test almost has no change.
In addition, in embodiment 1, the abrasion loss of the bearing of the front and back of long duration test is 100%.That is, in embodiment 1, the bearing of the front and back of long duration test almost has no abrasion.
On the other hand, in comparative example 1, the gross exhaust gas of the front and back of long duration test is 8%.That is, in comparative example 1, the lubricants capacity of the front and back of long duration test significantly reduces.
In addition, in comparative example 1, the abrasion loss of the bearing of the front and back of long duration test is 99%.That is, in comparative example 1, the bearing of the front and back of long duration test almost has no abrasion.
According to above result can it is clear that, when embodiment 1 being compared with comparative example 1, the motor 20 of embodiment 1 significantly can suppress air displacement.And the motor 20 of embodiment 1 uses silicone oil 24c as lubricating oil.Therefore, if use the motor 20 of embodiment 1, even if then release a little silicone oil from motor 20, the impact produced the food be kept in case etc. is also little.
In addition, the amount of the silicone oil be released in case from motor 20 is micro-, therefore, it is possible to suppress the silicone oil be released in case to produce harmful effect to electrical contact portions such as the switches in case.
Further, when embodiment 1 is compared with comparative example 1, can confirm: the bearing 8 used in the motor 20 of embodiment 1 can be suppressed for the abrasion loss equal with the bearing 112 that uses in comparative example 1.
In other words, the abrasion of motor 20 without the need to using felt just can suppress bearing 8 of embodiment 1.And the motor 20 of embodiment 1 can suppress the amount of the silicone oil of releasing from motor 20.Therefore, the motor 20 of embodiment 1 can reduce the amount of the silicone oil 24c possessed in advance.
Therefore, if use the motor in execution mode 1 of the present utility model, then the box fan used in the inside of freezing equipment can reduce the impact that the air displacement that produces from motor suppresses the food be kept in case.In addition, the motor efficiency in execution mode 1 of the present utility model is high, and can obtain the long driving life-span.
And the motor in execution mode 1 of the present utility model can realize the miniaturization of motor body.
(execution mode 2)
Figure 14 is the sectional view of the motor in execution mode 2 of the present utility model.Figure 15 observes the synoptic diagram that the rotor that uses in the motor in execution mode 2 of the present utility model obtains in fig. 14 from below.
Figure 16 to Figure 18 observes the major part enlarged drawing that the rotor that uses in the motor in execution mode 2 of the present utility model obtains in fig. 14 from below.
Figure 19, Figure 21 are the major part enlarged drawing of the major part that the rotor used in the motor in execution mode 2 of the present utility model is described respectively.
Figure 20, Figure 22 observe the major part enlarged drawing that the rotor that uses in the motor in execution mode 2 of the present utility model obtains in fig. 14 from below.
Figure 23, Figure 24 are the major part enlarged drawing of the major part that other rotor used in the motor in execution mode 2 of the present utility model is described respectively.
Figure 25 is the main portion sectional view of other motor in execution mode 2 of the present utility model.
In addition, for the structure identical with the motor in present embodiment 1, mark identical mark, and quote explanation.
As shown in Figure 14, Figure 15, in motor 20b, rotor 7d also has more than one recess 26 on plane 7b.Plane 7b is formed side 7c.Recess 26 is the depression along 5a direction, axle center in the cross section comprising axle center 5a.Recess 26 is the ring-types centered by the 5a of axle center.
In addition, as shown in Figure 16 to Figure 18, recess also can realize with shape below.That is, as shown in figure 16, recess 26a also can realize with the ring-type of ellipse.As shown in figure 17, recess 26b also can realize with hexagonal ring-type.In addition, recess 26b also can realize with polygonal ring-type.As shown in figure 18, recess 26c also can realize with the ring-type comprising groove portion 22.
In addition, as shown in Figure 19, Figure 20, motor has recess 26, the 26d of plural ring-type centered by the 5a of axle center sometimes.In this case, on the plane 7b being formed with side 7c, the internal diameter centered by the 5a of axle center of each recess 26,26d is different.
In addition, as shown in Figure 21 to Figure 23, motor has recess 26e, 26f of plural ring-type centered by the 5a of axle center sometimes.In this case, in the cross section comprising axle center 5a, the height from plane 7b of each recess 26e, 26f is different.
Specifically, as shown in Figure 21, Figure 22, recess 26e, 26f can be formed integrally as stepped.Or as shown in figure 23, recess 26e, 26f can be formed independently of one another.
Further, as shown in figure 24, what recess 26e, 26f, 26g can be formed as from 7c side, axle 5 side direction side depth shallower is stepped.Or, recess can be formed as from 7c side, the axle 5 side direction side degree of depth deepen stepped.
In addition, as shown in figure 25, in motor 20b, the moulded resin 11 as resin portion also has convex stage portion 11d in the face 11a in the face of plane 7b, and the recess 26d that this convex stage portion 11d and plane 7b has becomes protruding opposite to each other.
In addition, as shown in figure 14, in motor 20b, rotor 7d has and hates oily portion 23.On plane 7b, oily portion 23 is hated to be positioned at than the position of recess 26 near 7c side, side.Oily portion 23 is hated to keep oleophobic agent 25.Oily portion 23 is hated to be ring-types centered by the 5a of axle center.
In addition, as shown in figure 14, the second end face 8f is positioned at the side contrary with the first end face 8e that the bearing 8 as sintered metal bearing has.About motor 20b, plane 7b and the distance between the second end face 8f of isoplanar 7b position are in opposite directions set to A1.About motor 20b, the distance between the peristome 10a have plane 7b and housing 10 is set to A2.About motor 20b, the distance between side 7c and the maintenance resin portion of housing 10 and the surperficial 11c of moulded resin 11 is set to A3.
Now, the distance A1 of rotor 7, A2, A3 are below 1mm.
In addition, as shown in figure 14, in motor 20b, sintered component 24 comprises powder 24a and overlay film component 24b.Powder 24a take iron as principal component.Overlay film component 24b covers powder.Overlay film component 24b comprises copper.
If be set to this structure, even if then when the posture downward with axle 5 vertical drives motor 20b, the silicone oil 24c comprised in bearing 8 also can stay in recess 26.That is, can prevent the silicone oil 24c comprised in bearing 8 from flowing to the 7c face, side of magnet 6.Therefore, the motor 20b in present embodiment 2 can suppress the leakage of the silicone oil 24c comprised in bearing 8 further.
Its result, the motor 20b in present embodiment 2 can reduce the air displacement produced from motor 20b and obtain the long driving life-span further.
In addition, when being coated with oleophobic agent 25 to magnet 6, recess 26 can prevent oleophobic agent 25 from moving to axle 5 effluent.Therefore, recess 26 is to determining that in the operation of coating oleophobic agent 25 position of coating oleophobic agent 25 is also effective.
(execution mode 3)
Figure 26 to Figure 28 is the major part enlarged drawing of the major part that the rotor used in the motor in execution mode 3 of the present utility model is described respectively.
In addition, for the structure identical with the motor in present embodiment 1,2, mark identical mark, and quote explanation.
As shown in Figure 26, Figure 27, in the motor, rotor 7e has more than one protuberance 21 and more than one recess 26 on plane 7b.Plane 7b is formed side 7c.
Protuberance 21 is the projection along 5a direction, axle center in the cross section comprising axle center 5a.Protuberance 21 is the ring-types centered by the 5a of axle center.
Recess 26 is the depression along 5a direction, axle center in the cross section comprising axle center 5a.Recess 26 is the ring-types centered by the 5a of axle center.
In addition, as shown in figure 28, in the motor, rotor 7e has a protuberance 21 and two recesses 26,26d on plane 7b.Plane 7b is formed side 7c.
Protuberance 21 is the projection along 5a direction, axle center in the cross section comprising axle center 5a.Protuberance 21 is the ring-types centered by the 5a of axle center.
Recess 26,26d are the depression along 5a direction, axle center in the cross section comprising axle center 5a.Recess 26,26d are the ring-types centered by the 5a of axle center.
As shown in present embodiment 3, above-mentioned execution mode 1 can be combinationally used with execution mode 2.
According to above explanation can it is clear that, the plane of the rotor that the motor in execution mode 1 to 3 of the present utility model uses in the motor has more than one protuberance and more than one recess.Protuberance and recess also can be combined to form.
If be set to this structure, then which direction no matter motor is installed as the axle that motor has is, silicone oil can both be stayed in motor.
Therefore, the motor of this structure can suppress the height of the axis direction of motor body.In addition, the motor of this structure can obtain the long driving life-span.
(execution mode 4)
Figure 29 is the key diagram of the freezing equipment represented in execution mode 4 of the present utility model.
In addition, for the structure identical with the motor in present embodiment 1 to 3, mark identical mark, and quote explanation.
As shown in figure 29, the refrigerator 40 as the freezing equipment in execution mode 4 of the present utility model possesses forced draft fan 31 and control part 32.
Forced draft fan 31 has the motor 20 and impeller 30 that illustrate in execution mode 1 to 3.Impeller 30 is installed on axle 5.
Control part 32 pairs of forced draft fans 31 drive.
If be set to the refrigerator of this structure, then the action effect that the motor that can obtain illustrating in execution mode 1 to 3 plays.
Therefore, according to the motor in execution mode 1 to 3 of the present utility model, in the box fan being installed on freezing equipment, high efficiency and the miniaturization of motor can be realized.
In addition, according to the motor in execution mode 1 to 3 of the present utility model, in the box fan being installed on freezing equipment, long driving life-span and high reliability can be guaranteed.
Motor of the present utility model such as can be used in the box fan installed in the receiving room had at the freezing equipment such as refrigerator, refrigerator-freezer.
Claims (16)
1. a motor, is characterized in that, possesses:
Stator, it has stator core and is wound in the stator winding of described stator core;
Axle, it is axle center with pivot, and axis direction extends;
Rotor, it is positioned at described stator position in opposite directions and is installed on described axle, and this rotor has plane and side, and described plane extends on the direction intersected with described axle center, and described side comprises magnetic component, extends on the plane along described axle center;
Sintered metal bearing, it comprises sintered component and silicone oil, described axle is rotatably supported, this sintered metal bearing has outer peripheral face, inner peripheral surface and the first end face, described outer peripheral face is positioned at the position in the face of described side and is formed along described axle center, described inner peripheral surface is positioned at and is formed along described axle center near the position of described axle side than described outer peripheral face, the surface of this inner peripheral surface comprises the multiple and described tactile sliding contacting part that is coupling, described outer peripheral face is connected with described inner peripheral surface by described first end face, be positioned at the end of the side of described sintered metal bearing on described axis direction,
Housing, it has peristome and cylindrical portion, and described opening is in the side of described housing on described axis direction, and described cylindrical portion comprises the inner surface in the face of described outer peripheral face and described first end face, and extends along described axle center; And
Resin portion, it keeps described stator and described housing.
2. motor according to claim 1, is characterized in that,
When ambient temperature is 25 DEG C, described silicon oil viscosity is in the scope of 35mPas to 70mPas.
3. motor according to claim 2, is characterized in that,
Described silicon oil viscosity being set to η, the rotating speed of described axle being set to n, described axle is set to P to described sintered metal bearing applied pressure, the radius of described axle is set to r, the radius of described sintered metal bearing is set to R, when the one-sided gap produced between described axle and described sintered metal bearing is set to c, passes through
S＝(ηn/P)×(r/c)
2
And the Sommerfeld number S of the described sintered metal bearing calculated is in the scope of 40 to 80, wherein, c=R-r.
4. motor according to claim 1, is characterized in that,
Described rotor also has the protuberance of more than one ring-type centered by described axle center in the described plane being formed with described side, and described protuberance is the projection along described axis direction in the cross section comprising described axle center.
5. motor according to claim 4, is characterized in that,
When having the protuberance of plural ring-type centered by described axle center, in the described plane being formed with described side, the internal diameter centered by described axle center of protuberance described in each is different.
6. motor according to claim 4, is characterized in that,
When having the protuberance of plural ring-type centered by described axle center, in the cross section comprising described axle center, the height from described plane of protuberance described in each is different.
7. motor according to claim 1, is characterized in that,
Described rotor also has the recess of more than one ring-type centered by described axle center in the described plane being formed with described side, and described recess is the depression along described axis direction in the cross section comprising described axle center.
8. motor according to claim 7, is characterized in that,
When having the recess of plural ring-type centered by described axle center, in the described plane being formed with described side, the internal diameter centered by described axle center of recess described in each is different.
9. motor according to claim 7, is characterized in that,
When having the recess of plural ring-type centered by described axle center, in the cross section comprising described axle center, the degree of depth from described plane of recess described in each is different.
10. motor according to claim 4, is characterized in that,
Described resin portion also has concavity stage portion on the face in the face of described plane, and the protuberance that described concavity stage portion and described plane have becomes depression opposite to each other.
11. motor according to claim 7, is characterized in that,
Described resin portion also has convex stage portion on the face in the face of described plane, and the recess that described convex stage portion and described plane have becomes protruding opposite to each other.
12. motor according to claim 4, is characterized in that,
What described rotor also had ring-type centered by described axle center on the plane hates oily portion, described in hate oily portion to be positioned at than the position of described protuberance near described side, and keep oleophobic agent.
13. motor according to claim 7, is characterized in that,
What described rotor also had ring-type centered by described axle center on the plane hates oily portion, described in hate oily portion to be positioned at than the position of described recess near described side, and keep oleophobic agent.
14. motor according to claim 1, is characterized in that,
Distance between the second end face described plane and described sintered metal bearing the had distance be set between A1, the described peristome that described plane and described housing had is set to A2, by described side and when keeping the distance between the surface of the described resin portion of described housing to be set to A3, described A1, A2, A3 of described rotor are below 1mm, and wherein said second end face is positioned at described plane position in opposite directions and is positioned at the side contrary with described first end face.
15. motor according to claim 1, is characterized in that,
Described sintered component comprise with iron be principal component powder and cover the overlay film component comprising copper of described powder.
16. 1 kinds of freezing equipments, is characterized in that possessing:
Forced draft fan, its impeller that there is motor according to claim 1 and be installed on described axle; And
Control part, it drives described forced draft fan.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2014252612 | 2014-12-15 | ||
| JP2014-252612 | 2014-12-15 |
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| CN205178723U true CN205178723U (en) | 2016-04-20 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110301086A (en) * | 2017-02-14 | 2019-10-01 | 日本电产三协株式会社 | Motor and pump installation |
| CN114087803A (en) * | 2021-11-16 | 2022-02-25 | 沧州沃盛源节能电器设备有限公司 | Low-noise anti-abrasion structure for air source heat pump |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101869951B1 (en) * | 2016-12-19 | 2018-06-21 | 뉴모텍(주) | Fan Motor |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06101905B2 (en) * | 1992-02-17 | 1994-12-12 | 株式会社ゼクセル | Small electric motor |
| JP3701809B2 (en) * | 1999-03-17 | 2005-10-05 | 株式会社三協精機製作所 | Small motor |
| JP3774614B2 (en) * | 2000-03-31 | 2006-05-17 | Ｎｔｎ株式会社 | Sintered oil-impregnated bearing material using copper-coated iron powder and manufacturing method thereof |
| JP2004036649A (en) * | 2002-06-28 | 2004-02-05 | Shinano Kenshi Co Ltd | Shaft, bearing, and motor |
| JP4443915B2 (en) * | 2003-12-24 | 2010-03-31 | Ｎｔｎ株式会社 | Hydrodynamic bearing device |
| JP6253134B2 (en) * | 2012-09-03 | 2017-12-27 | ポーライト株式会社 | Sintered bearing |
-
2015
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|---|---|---|---|---|
| CN110301086A (en) * | 2017-02-14 | 2019-10-01 | 日本电产三协株式会社 | Motor and pump installation |
| CN114087803A (en) * | 2021-11-16 | 2022-02-25 | 沧州沃盛源节能电器设备有限公司 | Low-noise anti-abrasion structure for air source heat pump |
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| JP2016116446A (en) | 2016-06-23 |
| JP6634591B2 (en) | 2020-01-22 |
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