CN207098823U - Motor and the freezing equipment for possessing motor - Google Patents

Abstract

A kind of motor is provided and possesses the freezing equipment of motor.The utility model possesses stator (4), axle (5), rotor (7), the bearing (8) as sintered metal bearing, housing (10) and moulded resin (11) as resin portion as the motor (20) of object.Rotor (7) is located at the position opposed with stator (4).Bearing (8) includes sintered component (24), and the support shaft (5) in a manner of axle (5) rotates freely.Bearing (8) is pressed into shell (10) together with axle (5).Bearing (8) diametrically support shaft (5).

Description

Motor and the freezing equipment for possessing motor

Technical field

A kind of motor used in the freezing equipments such as refrigerator, refrigerator-freezer is the utility model is related to, more particularly to a kind of peace The motor used in pressure fan in case loaded on freezing equipment.

Background technology

In general family, the freezing equipment such as refrigerator, refrigerator-freezer is the equipment for consuming a large amount of electric power.Therefore, set for freezing It is standby to be strongly required electric power saving.

In freezing equipment, the key element of most consumption electric power is compressor.If in addition, utilize the case installed in freezing equipment Interior pressure fan, then freezing equipment can reduce consumption electric power.Specifically, freezing equipment drives pressure fan forcibly to make Circulating cold air in case.When being circulated when the being forced property of cold air in case, the temperature in case reduces.If the temperature drop in case It is low, then the load reduction of compressor.In addition, if the temperature in case reduces, then the number of compressor is driven to reduce.In addition, case Inside refer to the inner space of freezing equipment, refer in particular to accommodation space.

Thus, high demand be present in pressure fan for efficiency high and with high draft capacity, being installed in case.In addition, In the following description, the pressure fan being installed in case is also referred to as box fan sometimes.

Box fan can be divided into following specification.That is, the box fan and direct current of exchange driving in box fan be present The box fan of driving.

The box fan of exchange driving does not need rectification circuit etc., therefore can reduce component number.Therefore, it is possible to reduce Exchange the cost of the box fan of driving.For example, have and can be carried out merely with AC power in the box fan of exchange driving Drive and possess the box fan of the induction conductivity of shaded-pole.

The box fan of DC driven needs rectification circuit etc..But the effect of the motor of the box fan of DC driven Rate is high, therefore can reduce power consumption.Possesses brushless dc motor for example, having in the box fan of DC driven Box fan.

In recent years, the requirement to the electric power saving of freezing equipment is high, therefore box fan is in the case using DC driven The tendency of internal fan.

In addition, the freezing equipment using refrigerator as representative operates all the time.It is therefore desirable in the case used in freezing equipment Fan has the long driving life-span.

Driving life-span of the structural elements of the motor used in box fan to box fan has an impact.Particularly, The component of the spinning movement of supporting motor in the structural elements of motor produces big shadow to the driving life-span of box fan Ring.The slipper of bearing and axle has much relations with the spinning movement of motor.In order to swimmingly carry out sliding action, to axle Hold and provide lubricating oil with the slipper of axle.Therefore, lubricating oil also produces big influence to the driving life-span of box fan.

In the past, it is desirable to which the motor cost used in the box fan of DC driven is low and with the long driving life-span.Cause This, sliding bearing is used in the motor used in the box fan of DC driven.Particularly, as sliding bearing, mostly The sintered metal bearing for being soaked with lubricating oil using being included in bearing.

In addition, in the case that the lubricating oil used within the bearing is reduced due to long-standing driving, between bearing and axle Generation metal contacts.When generation metal contacts between bearing and axle, box fan can produce abnormal sound sometimes.Or work as bearing When generation metal contacts between axle, axle can burn with bearing and stick together sometimes.When axle and bearing, which burn, to stick together, wind in case Fan stops.In the case where producing these undesirable conditions, box fan is arrived the life-span.

Therefore, for the motor used in box fan, try to increase the maintenance dose of lubricating oil to extend the life-span.That is, In the motor, big space is ensured in the inside of motor and has been impregnated with the felt of lubricating oil to install.Containing the felt for being soaked with lubricating oil It is installed in around bearing.

In addition, in the past, the box fan used in case is horizontal direction or axle towards lead using axle possessed by motor Mode on vertical is installed.

In addition, further improve occupancy load for refrigerator requirement.In recent years, on refrigerator, in order to improve storage ability, Sometimes the layout in case is changed to expand storage volume.As a result, because of the layout changing in case, box fan is sometimes with axle direction The downward mode of vertical is installed.In addition, box fan is installed in a manner of axle is a variety of directions sometimes.

Figure 30 is the sectional view for representing conventional motor.

As shown in figure 30, the motor 120 disclosed in patent document 1 possesses stator 101, rotor 102, the guarantor of output shaft side Hold the holding unit 104 of the opposite side of unit 103 and output shaft side.

The holding unit 103 of output shaft side keeps rotor 102.Housing 115 is pressed into bottom cover 111 to form holding unit 103.The bottom of at, the inside of cover 111 and housing 115 includes bearing 112, spring 113 and felt 114 as elastomer.Bearing 112 Supporting rotor 102.Spring 113 keeps bearing 112.Felt 114 includes lubricating oil.Lubricating oil reduces bearing 112 and slided with rotor 102 When the caused friction between bearing 112 and rotor 102.

The holding unit 104 of the opposite side of output shaft side is identical with the structure of holding unit 103, also with thrust plate 116.Push away Power plate 116 supporting rotor 102, i.e. supporting rotor 102 in thrust direction in the axial direction.

In addition, in patent document 2, the motor without using felt is disclosed.Motor shown in patent document 2 is rotor Positioned at the outer rotor type motor than stator close to the position in outside.

Patent document 1：Japanese Unexamined Patent Publication 2012-253985 publications

Patent document 2：Japanese Unexamined Patent Publication 10-178758 publications

Utility model content

The utility model possesses stator, axle, rotor, sintered metal bearing, housing and resin as the motor of object Portion.

Stator has stator core and stator winding.Stator winding is wound in stator core.

Axle extends using pivot as axle center on axis direction.

Rotor is located at the position opposed with stator.Rotor is installed on axle.Rotor has plane and side.Plane with axle center The side of intersection upwardly extends.Side includes magnetic component.Side extends along axle center in the plane.

Sintered metal bearing includes sintered component, and the support shaft in a manner of axle rotates freely.Sintered metal bearing has Outer peripheral face, inner peripheral surface and first end face.Outer peripheral face is located at the position opposite with side.Outer peripheral face is formed along axle center.Inner circumferential Face is located at than outer peripheral face close to the position of axle side.Inner peripheral surface is formed along axle center.Inner peripheral surface includes multiple and axle in its surface The sliding contact portion of contact.Outer peripheral face is connected by first end face with inner peripheral surface.First end face is located at sintered metal bearing in axle center The end of a side on direction.

Housing has opening portion and cylindrical portion.A side of the opening in housing on axis direction.Cylindrical portion include with Outer peripheral face and the opposite inner surface of first end face.Cylindrical portion extends along axle center.

Resin portion keeps stator and housing.

The solution used to solve the problem

The motor for following the 1st aspect of the utility model possesses：Stator, it has stator core and is wound in institute State the stator winding of stator core；Axle, it extends using pivot as axle center on axis direction；Rotor, its be located at it is described The opposed position of stator is simultaneously installed on the axle, the rotor has a plane and side, and the plane is being intersected with the axle center Side upwardly extends, and the side includes magnetic component, extends on the plane along the axle center；Sintered metal bearing, its Comprising sintered component, and the axle is supported in a manner of the axle rotates freely, the sintered metal bearing has outer peripheral face, inner circumferential Face and first end face, the outer peripheral face is positioned at the position opposite with the side and is formed along the axle center, the inner circumferential Wrapped positioned at being formed than the outer peripheral face close to the position of the axle side and along the axle center on the surface of the inner peripheral surface in face The multiple sliding contact portions contacted with the axle are included, the outer peripheral face is connected, is located at by the first end face with the inner peripheral surface The end of a side of the sintered metal bearing on the axis direction；Housing, it has opening portion and cylindrical portion, the opening portion Positioned at a side of the housing on the axis direction, the cylindrical portion includes and the outer peripheral face and the first end face phase To inner surface, and along the axle center extend；And resin portion, it keeps the stator and the housing, the rotor There is the convex portion of the more than one ring-type centered on the axle center also in the plane formed with the side, it is described Convex portion is in the projection along the axis direction in the section comprising the axle center.

The 2nd aspect motor in, the 1st aspect motor with more than two centered on the axle center In the case of the convex portion of ring-type, in the plane formed with the side, each convex portion using the axle center in The internal diameter of the heart is different.

The 3rd aspect motor in, the 1st aspect motor with more than two centered on the axle center In the case of the convex portion of ring-type, in the section comprising the axle center, the height from the plane of each convex portion is not Together.

In the motor of the 4th aspect, the rotor of the motor of the 1st aspect is also formed with described in the side There is the recess of the more than one ring-type centered on the axle center, the recess is including the section in the axle center in plane In be in along the axis direction depression.

The 5th aspect motor in, the 4th aspect motor with more than two centered on the axle center In the case of the recess of ring-type, in the plane formed with the side, each recess using the axle center in The internal diameter of the heart is different.

The 6th aspect motor in, the 4th aspect motor with more than two centered on the axle center In the case of the recess of ring-type, in the section comprising the axle center, the depth from the plane of each recess is not Together.

In the motor of the 7th aspect, the resin portion of the motor of the 1st aspect is also in the face opposite with the plane Upper to have concavity stage portion, the concavity stage portion is opposed to turn into depression with convex portion possessed by the plane.

In the motor of the 8th aspect, the resin portion of the motor of the 4th aspect is also in the face opposite with the plane Upper to have convex stage portion, the convex stage portion is opposed to turn into projection with recess possessed by the plane.

In the motor of the 9th aspect, the rotor of the motor of the 1st aspect also has with described on the plane Ring-type centered on axle center hates oily portion, described to hate oily portion to be located at than the convex portion close to the position of the side, and keeps Oleophobic agent.

In the motor of the 10th aspect, the rotor of the motor of the 4th aspect also has with institute on the plane The oily portion of hating of the ring-type centered on axle center is stated, it is described to hate oily portion to be located at than the recess close to the position of the side, and protect Hold oleophobic agent.

In the motor of the 11st aspect, the motor of the 1st aspect is by the plane and the sintered metal bearing institute The distance between second end face having be set to A1, by between the opening portion possessed by the plane and the housing away from During from being set to A2, the distance between the side and the surface of the resin portion for keeping the housing be set into A3, described turn Described A1, A2, A3 of son are below 1mm, wherein the second end face positioned at the position opposed with the plane and positioned at The opposite side of the first end face.

In the motor of the 12nd aspect, the sintered component of the motor of the 1st aspect is included using iron as principal component Powder and the overlay film component comprising copper for covering the powder.

The freezing equipment for following the 13rd aspect of the utility model possesses：Pressure fan, it has electronic described in the 1st aspect Machine and the impeller for being installed on the axle；And control unit, it is driven to the pressure fan.

Brief description of the drawings

Fig. 1 is the sectional view of the motor in embodiment 1 of the present utility model.

Fig. 2 is observed from below in Fig. 1 obtained by the rotor used in the motor in embodiment 1 of the present utility model The synoptic diagram arrived.

Fig. 3 is observed from below in Fig. 1 obtained by the rotor used in the motor in embodiment 1 of the present utility model The enlarged view of the main part arrived.

Fig. 4 is to observe the other rotors used in the motor in embodiment 1 of the present utility model from below in Fig. 1 Resulting enlarged view of the main part.

Fig. 5 is to observe the other rotors used in the motor in embodiment 1 of the present utility model from below in Fig. 1 Resulting enlarged view of the main part.

Fig. 6 is the main of the major part of rotor that illustrates to use in the motor in embodiment 1 of the present utility model Magnified partial view.

Fig. 7 is observed from below in Fig. 1 obtained by the rotor used in the motor in embodiment 1 of the present utility model The enlarged view of the main part arrived.

Fig. 8 is the major part of other rotors for illustrating to use in the motor in embodiment 1 of the present utility model Enlarged view of the main part.

Fig. 9 is to observe the other rotors used in the motor in embodiment 1 of the present utility model from below in Fig. 1 Resulting enlarged view of the main part.

Figure 10 is the major part of other rotors for illustrating to use in the motor in embodiment 1 of the present utility model Enlarged view of the main part.

Figure 11 is the major part of other rotors for illustrating to use in the motor in embodiment 1 of the present utility model Enlarged view of the main part.

Figure 12 is the main portion sectional view of other motor in embodiment 1 of the present utility model.

Figure 13 is the sectional view of other motor in embodiment 1 of the present utility model.

Figure 14 is the sectional view of the motor in embodiment 2 of the present utility model.

Figure 15 is to observe the rotor institute used in the motor in embodiment 2 of the present utility model from below in fig. 14 Obtained synoptic diagram.

Figure 16 is to observe the rotor institute used in the motor in embodiment 2 of the present utility model from below in fig. 14 Obtained enlarged view of the main part.

Figure 17 is to observe other turns used in the motor in embodiment 2 of the present utility model from below in fig. 14 Enlarged view of the main part obtained by son.

Figure 18 is to observe other turns used in the motor in embodiment 2 of the present utility model from below in fig. 14 Enlarged view of the main part obtained by son.

Figure 19 is the main of the major part of rotor that illustrates to use in the motor in embodiment 2 of the present utility model Magnified partial view.

Figure 20 is to observe the rotor institute used in the motor in embodiment 2 of the present utility model from below in fig. 14 Obtained enlarged view of the main part.

Figure 21 is the major part of other rotors for illustrating to use in the motor in embodiment 2 of the present utility model Enlarged view of the main part.

Figure 22 is to observe other turns used in the motor in embodiment 2 of the present utility model from below in fig. 14 Enlarged view of the main part obtained by son.

Figure 23 is the major part of other rotors for illustrating to use in the motor in embodiment 2 of the present utility model Enlarged view of the main part.

Figure 24 is the major part of other rotors for illustrating to use in the motor in embodiment 2 of the present utility model Enlarged view of the main part.

Figure 25 is the main portion sectional view of other motor in embodiment 2 of the present utility model.

Figure 26 is the main of the major part of rotor that illustrates to use in the motor in embodiment 3 of the present utility model Magnified partial view.

Figure 27 is the major part of other rotors for illustrating to use in the motor in embodiment 3 of the present utility model Enlarged view of the main part.

Figure 28 is the major part of other rotors for illustrating to use in the motor in embodiment 3 of the present utility model Enlarged view of the main part.

Figure 29 is the explanation figure for representing the freezing equipment in embodiment 4 of the present utility model.

Figure 30 is the sectional view for representing conventional motor.

Embodiment

Motor in each embodiment of the present utility model passes through structure described later, efficiency high and the drive that can obtain length The dynamic life-span.Moreover, the motor as each embodiment of the present utility model can realize the miniaturization of motor body.

That is, conventional motor exist it is following should improved point.That is, the box fan of DC driven need by Exchange is converted to the power conversion units such as the rectification circuit of direct current.In the box fan to DC driven and wind in the case for exchanging driving In the case that fan is compared, the construction of the box fan of DC driven is complicated, and device becomes big.

In freezing equipment, particularly in refrigerator, box fan is minimized in order to expand accommodation space requirement.

Therefore, in order that the box fan of DC driven is small-sized, it is contemplated that remove the felt for including lubricating oil from motor. But if remove felt, the lifetime of obvious box fan.

In addition, the risk of the inside for being partly into bearing of felt be present using in the structure of felt in the motor.In felt The inside for being partly into bearing in the case of, axle is locked sometimes.For the use of the motor of felt is potential with quality Improvement point.

Then, due to it is following the reasons why, the motor of the outer-rotor type disclosed in patent document 2 is unsuitable in freezing equipment Middle use.

I.e., in general, in freezing equipment, so that the shell of motor possessed by box fan is fixed in case Mode uses box fan.Motor is fixed in a manner of the axis direction clamping shell along the axle included by motor 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 motor for the outer-rotor type that the shell of motor is rotated is not appropriate for consolidating as the shell of motor Due to the motor of the box fan in case.

In addition, the motor of the outer-rotor type disclosed in patent document 2 is mainly used in cooling down information equipment.

In addition, the motor of outer-rotor type is unsuitable for requiring the purposes in long driving life-span as freezing equipment.

Next, when using box fan in the inside of receiving room possessed by refrigerator, sometimes with possessed by motor Axle is installed towards the downward mode of vertical.In this case, box fan needs to pay attention to following item.That is, the wind in case In the motor of fan, weight, i.e. thrust load are produced in the axle for being provided with impeller.

For example, the motor disclosed in patent document 1 is merely with the caused magnetic attraction between magnet and stator core To support thrust load.Therefore, in the case where impeller weight, i.e. thrust load is big, there is generation bearing and connect with magnet in motor Touch the risk for waiting undesirable condition.

Therefore, the motor in each embodiment of the present utility model with ensure box fan high efficiency and miniaturization, And for the purpose of long service life and high reliability.

Below, referring to the drawings and table illustrates embodiment of the present utility model.In addition, following embodiment is specific One of the present utility model is realized, is not intended to be defined technical scope of the present utility model.

In addition, in the following description, the electronic of driving source as the box fan used in freezing equipment is exemplified Machine.Box fan forcibly makes circulating cold air in the case of the refrigerator as freezing equipment, refrigerator-freezer etc..

(embodiment 1)

Fig. 1 is the sectional view of the motor in embodiment 1 of the present utility model.Fig. 2 is to observe this from below in Fig. 1 Synoptic diagram obtained by the rotor used in motor in the embodiment 1 of utility model.

Fig. 3 to Fig. 5 is to observe to use in the motor in embodiment 1 of the present utility model in Fig. 1 from below respectively Rotor obtained by enlarged view of the main part.

Fig. 6, Fig. 8 are the main portion of rotor for illustrating to use in the motor in embodiment 1 of the present utility model respectively The enlarged view of the main part divided.

Fig. 7, Fig. 9 are to observe to use in the motor in embodiment 1 of the present utility model in Fig. 1 from below respectively Enlarged view of the main part obtained by rotor.

Figure 10, Figure 11 are the other rotors for illustrating to use in the motor in embodiment 1 of the present utility model respectively The enlarged view of the main part of major part.

Figure 12 is the main portion sectional view of other motor in embodiment 1 of the present utility model.Figure 13 is this reality With the sectional view of other motor in new embodiment 1.

As shown in figure 1, the motor 20 in embodiment 1 of the present utility model possess stator 4, axle 5, rotor 7, as burning Tie bearing 8, housing 10 and the moulded resin 11 as resin portion of oiliness bearing.

Stator 4 has stator core 1 and stator winding 3.Stator winding 3 is wound in stator core 1.

Axle 5 extends using pivot 7a as axle center 5a on axis direction.

Rotor 7 is located at the position opposed with stator 4.Rotor 7 is installed on axle 5.Rotor 7 has plane 7b and side 7c.It is flat Face 7b upwardly extends in the side intersected with axle center 5a.Side 7c includes magnetic component.Side 7c is on plane 7b along axle center 5a Extension.

Bearing 8 as sintered metal bearing includes sintered component 24, the support shaft 5 in a manner of axle 5 rotates freely.As The bearing 8 of sintered metal bearing has outer peripheral face 8c, inner peripheral surface 8d and first end face 8e.Outer peripheral face 8c is located at and side 7c phases To position.Outer peripheral face 8c is formed along axle center 5a.Inner peripheral surface 8d is located at than outer peripheral face 8c close to the position of the side of axle 5.Inner peripheral surface 8d is formed along axle center 5a.Inner peripheral surface 8d includes sliding as the first of the multiple sliding contact portions contacted with axle 5 in its surface Dynamic contact site 8a and the second sliding contact portion 8b.Outer peripheral face 8c is connected by first end face 8e with inner peripheral surface 8d.First end face 8e positions In the end of a side of the bearing 8 on the 5a directions of axle center.

Housing 10 has opening portion 10a and cylindrical portion 10b.Opening portion 10a is located at one of housing 10 on the 5a directions of axle center Side.Cylindrical portion 10b includes the inner surface 10c opposite with outer peripheral face 8c and first end face 8e.Cylindrical portion 10b prolongs along axle center 5a Stretch.

Moulded resin 11 as resin portion keeps stator 4 and housing 10.

The structure for especially playing remarkable effect effect is as described below.In addition, in a part of accompanying drawing, oleophobic agent 25 is eliminated Record see accompanying drawing to facilitate.

I.e., as shown in Figure 1 and Figure 2, in motor 20, rotor 7 has more than one convex portion 21 also on plane 7b. Formed with side 7c on plane 7b.Convex portion 21 is the projection along axle center 5a directions in the section including axle center 5a.Convex portion 21 It is the ring-type centered on the 5a of axle center.

In addition, as shown in Figures 3 to 5, convex portion can also be realized with following shape.That is, as shown in Fig. 3, convex portion 21a can also be realized with the ring-type of ellipse.As shown in figure 4, convex portion 21b can also be realized with the ring-type of hexagon.Remove Beyond this, convex portion 21b can also be realized with the ring-type of polygon.As shown in figure 5, convex portion 21c also can be with including groove portion 22 Ring-type realize.

In addition, as shown in Figure 6, Figure 7, convex portion of the motor sometimes with the ring-type centered on more than two 5a by axle center 21、21d.In this case, on the plane 7b formed with side 7c, each convex portion 21,21d centered on the 5a of axle center Internal diameter is different.

In addition, as shown in Fig. 8 to Figure 10, motor is sometimes with the convex of the ring-type centered on more than two 5a by axle center Portion 21e, 21f.In this case, in the section including axle center 5a, each convex portion 21e, 21f height from plane 7b It is different.

Specifically, as shown in Figure 8, Figure 9, convex portion 21e, 21f may be integrally formed to be stepped.Or such as Figure 10 Shown, convex portion 21e, 21f can be formed independently of each other.

Also, as shown in figure 11, convex portion 21e, 21f, 21g can be formed as from the lateral side 7c sides height step-down of axle 5 It is stepped.Or convex portion can be formed as highly uprising from the lateral side 7c sides of axle 5 it is stepped.

In addition, as shown in figure 12, in motor 20, moulded resin 11 as resin portion is also opposite with plane 7b There is concavity stage portion 11b, the concavity stage portion 11b and convex portion 21d possessed by plane 7b to be opposed to turn into recessed in the 11a of face Fall into.

In addition, as shown in figure 1, in motor 20, rotor 7, which has, hates oily portion 23.On plane 7b, oily portion 23 is hated to be located at Than convex portion 21 close to the position of side 7c sides.Oily portion 23 is hated to keep oleophobic agent 25.It is the ring centered on the 5a of axle center to hate oily portion 23 Shape.

In addition, as shown in figure 1, second end face 8f be located at the bearing 8 as sintered metal bearing possessed by first end Side opposite face 8e.On motor 20, by plane 7b between the second end face 8f of the opposed positions of coplanar 7b Distance be set to A1.On motor 20, the distance between opening portion 10a possessed by plane 7b and housing 10 is set to A2. On motor 20, the resin portion by side 7c and holding housing 10 is that the distance between surface 11c of moulded resin 11 is set to A3。

Now, distance A1, A2, A3 of rotor 7 are below 1mm.

In addition, as shown in figure 1, in motor 20, sintered component 24 includes powder 24a and overlay film component 24b.Powder 24a is using iron as principal component.Overlay film component 24b covers powder.Overlay film component 24b includes copper.

Accompanying drawing is reused to explain.

As shown in figure 1, stator 4 has insulator 2 between stator core 1 and stator winding 3.Insulator 2 is by stator iron Core 1 insulate with the phase of stator winding 3.Stator winding 3 is wound with stator core 1.

Rotor 7 is inserted into the inner side of stator 4.The rotor 7 of motor 20 is located at the inner side of stator 4 and rotated.Electricity Motivation 20 is also referred to as inner-rotor type motor.

Rotor 7 has the magnet 6 including ferrite resin as permanent magnet.Axle 5 is in a manner of central through magnet 6 It is installed on magnet 6.Axle 5 is pressed into housing 10 together with the bearing 8 as sintered metal bearing.Housing 10 is by metal material Formed.Bearing 8 has the first sliding contact portion 8a and the second sliding contact portion 8b in the inner side contacted with axle 5.Existed with bearing 8 Radially support shaft 5.With the thrust load of the support shaft 5 of thrust plate 9.Contain in bearing 8 and be soaked with lubricating oil.Lubricating oil prevent axle 5 with The metal contact of bearing 8.

Also, circuit layout card 14 is built-in with motor 20, the circuit layout card 14 is provided with including control circuit Drive circuit.On circuit layout card 14 leaded 13a etc. is connected via connector 13.Circuit layout card 14 is via lead 13a Outside input from motor 20 or the outside output supply voltage to motor 20, control signal etc..

Stator 4, housing 10, circuit layout card 14, the connector 13 of motor 20 in present embodiment 1 pass through molding Resin 11 and be integrally formed.

Housing 10 is to form hollow cylindric cup-shaped.The inner circumferential footpath of housing 10 is less than the periphery footpath of bearing 8.Cause This, if bearing 8 is pressed into housing 10, by housing 10 via diametrically support shaft 5 of bearing 8.Axle 5 is also via housing 10 And it is molded resin 11 and supports.

Also, rotor 7 is inserted into the inner circumferential side of moulded resin 11.In addition, housing 12 is pressed into moulded resin 11.

Formed moulded resin 11 resin material can from the unsaturated polyester (UP) system resin of thermosetting resin, phenol resin, Properly selected in epoxy system resin etc..In addition, the resin material for forming moulded resin 11 can also be from the poly- of thermoplastic resin Properly selected in ethylene glycol terephthalate system resin, polybutylene terephthalate (PBT) system resin etc..Present embodiment 1 In moulded resin 11 have selected the unsaturated polyester resin of thermosetting resin.

Above-mentioned motor 20 can be used in box fan.Via connector 13 to circuit possessed by motor 20 Wiring plate 14 provides supply voltage and control signal etc..Stator winding 3 is carried from the drive circuit for being installed on circuit layout card 14 For driving current.When driving a current through stator winding 3, magnetic field is produced in stator core 1.

From magnetic field caused by stator core 1 with mutually attracting from magnetic field caused by magnet 6 or mutually repelling, thus rotor 7 is carried out Spinning movement with axle 5 for pivot.

The magnet 6 and axle 5 of motor 20 in present embodiment 1 are integrally formed.If set to this structure, then can Prevent the lubricating oil that bearing 8 includes from leaking into motor 20 between the outer diameter face 5b of axle 5 and the aperture surface 6b of magnet 6 Outside.

Lubricating oil can use ester system oil, ether system oil, polyalphaolefin system oil, mineral oil system oil, silicon systems oil, fluorine system oil etc..This Outside, if it is possible to obtain same action effect, then can also use other oil.

Magnet 6 is the cup-shaped for the periphery for surrounding bearing 8.Magnet 6 is in internal side diameter formed with stair-stepping step.

Moulded resin 11 covers the periphery for the housing 10 for being pressed into bearing 8.The stair-stepping step that is formed in magnet 6 with The surface 11c of moulded resin 11 is opposed.

In addition, the clearance distance A3 for forming the side 7c and the surface 11c of moulded resin 11 of the magnet 6 of cup-shaped is 1mm。

If set to this structure, then the major part that can suppress the spinning movement including bearing 8 is electronic with surrounding The outside atmosphere contact of machine 20.

That is, the major part of the spinning movement including bearing 8 is big in gap formed by moulded resin 11 and magnet 6 Outside atmosphere of the width round with motor 20 contacts.Moulded resin 11 is subjected to multiple bending with gap formed by magnet 6, and Formed with 1mm width.Therefore, moulded resin 11 turns into the construction for the circulation for hindering air with gap formed by magnet 6.

Thus, even if turning into steam because rotor 7 rotates and made the lubricating oil included in bearing 8, turn into the lubrication of steam Oil can be also stayed in around bearing 8.That is, the lubricating oil included in bearing 8 is difficult to evaporate.As a result, present embodiment 1 In motor 20 can obtain length the driving life-span.

In addition, bearing 8 is formed by the sintered component 24 formed to iron powder covering copper film.

In the past, it is desirable to corrosion-resistant in the motor that the inside of refrigerator uses.Therefore, conventional motor is using copper powder as sintering Component.Thus, conventional bearing does not have magnetic.As a result, in conventional motor, the magnetic attraction of thrust direction only exists Produced between magnet and stator core.

However, the bearing 8 used in motor 20 in present embodiment 1 is the powder sintering for copper will be covered to iron powder forming Come what is formed.Therefore, bearing 8 can have magnetic while corrosion resistance is ensured.

According to this structure, the component of rotor of broad sense is formed by having magnetic, to be formed as cup-shaped magnet 6, bearing 8 And metal housing 10 is formed.Therefore, compared with conventional motor, the rotor of broad sense can produce stronger magnetic attachment Power.

Thus, on the motor 20 in present embodiment 1, even if to be installed into axle 5 downward towards vertical for motor 20 Posture, bearing 8 will not also 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, motor 20 is driven towards vertical downward posture even in axle 5 In the case of dynamic, it can also suppress oil leak to the outside of motor 20.Thus, even if by using in the case of motor 20 Fan is installed on receiving room of refrigerator etc., can also prevent from making receiving room dirty.Food etc. is preserved in receiving room, therefore can be tieed up Hold the state of health.

In addition, as shown in figure 1, formed with the convex portion 21 as rib on the plane 7b of the bottom for the cup-shaped for forming magnet 6. In hating for the outer circumferential side positioned at convex portion 21 oleophobic agent 25 is coated with oily portion 23.

If set to this structure, then even in the feelings being driven with axle 5 towards the downward posture of vertical to motor 20 Under condition, the lubricating oil included in bearing 8 can also stay in the inner circumferential side of convex portion 21.I.e. it is capable to prevent what is included in bearing 8 Lubricating oil flows to the side 7c faces of magnet 6.Therefore, the motor 20 in present embodiment 1 can further suppress in bearing 8 Comprising lubricating oil leakage.

As a result, the motor 20 in present embodiment 1 can further obtain the driving life-span of length.

In addition, when being coated with oleophobic agent 25 to magnet 6, convex portion 21 can prevent oleophobic agent 25 from being flowed to the side of axle 5.Therefore, Convex portion 21 is also effective to determining the position for being coated with oleophobic agent 25 in the operation of coating oleophobic agent 25.

Carried out using the conventional motor 120 shown in motor 20 and Figure 30 in the present embodiment 1 as one In the case of comparing, the motor 20 in present embodiment 1 realizes 20% or so slimming on axis direction.

It is because felt possessed by conventional motor 120 can be removed to think its main cause.Therefore, this implementation is used The box fan of motor 20 in mode 1 can realize space saving.

(embodiment 1)

Evaluation under the conditions of being carried out below using the motor for forming said structure.The content of evaluation is measure motor The decrement of possessed lubricating oil.It is recorded the result as embodiment 1 in table 1.

That is, the drive motor when environment temperature is 25 DEG C.Motor is installed in a manner of axle is downward towards vertical. With 3500r/m rotating speed drive motor.

(embodiment 2)

In example 2, the side 7c of magnet 6 and the surface 11c of moulded resin 11 clearance distance A3 are 0.5mm.Remove Beyond clearance distance A3 distance, embodiment 2 is identical with the structure of embodiment 1.

Carried out using the motor of shape cost structure it is same as Example 1 under the conditions of evaluation.The content and reality of evaluation Apply that example 1 is identical, determine the decrement of lubricating oil possessed by motor.It is recorded the result as embodiment 2 in table 1.

(embodiment 3)

In embodiment 3, the side 7c of magnet 6 and the surface 11c of moulded resin 11 clearance distance A3 are 1.5mm.Remove Beyond clearance distance A3 distance, embodiment 3 is identical with the structure of embodiment 1.

Carried out using the motor of shape cost structure it is same as Example 1 under the conditions of evaluation.The content and reality of evaluation Apply that example 1 is identical, determine the decrement of lubricating oil possessed by motor.It is recorded the result as embodiment 3 in table 1.

(embodiment 4)

In example 4, the side 7c of magnet 6 and the surface 11c of moulded resin 11 clearance distance A3 are 2mm.Except Beyond clearance distance A3 distance, embodiment 4 is identical with the structure of embodiment 1.

Carried out using the motor of shape cost structure it is same as Example 1 under the conditions of evaluation.The content and reality of evaluation Apply that example 1 is identical, determine the decrement of lubricating oil possessed by motor.It is recorded the result as embodiment 4 in table 1.

(embodiment 5)

As shown in figure 13, the motor 20a in embodiment 5 is formed as following structure.That is, motor 20a with magnet Moulded resin 11 is not present in position opposed 6 side 7c.In other words, motor 20a magnet 6 side 7c and housing 10 it Between moulded resin 11 is not present.In addition to the difference, embodiment 5 is identical with the structure of embodiment 1.

Carried out using the motor of shape cost structure it is same as Example 1 under the conditions of evaluation.The content and reality of evaluation Apply that example 1 is identical, determine the decrement of lubricating oil possessed by motor.It is recorded the result as embodiment 5 in table 1.

(comparative example 1)

As shown in figure 30, as comparative example 1, the motor 120 disclosed in patent document 1 is used.Further, since with implementation Example 1 is compared to embodiment 5, therefore in motor 120, lubricating oil is included only in bearing 112.In motor 120, Lubricating oil is not included in felt 114.

In addition, the material of the bearing 112 used in motor 120, lubricating oil, the material of moulded resin, the material of magnet Material, oleophobic agent, axle and thrust plate 116 are same as Example 1.

Carried out using the motor of shape cost structure it is same as Example 1 under the conditions of evaluation.The content and reality of evaluation Apply that example 1 is identical, determine the decrement of lubricating oil possessed by motor.It is recorded the result as comparative example 1 in table 1.

[table 1]

The result of long duration test of the embodiment 1 to embodiment 5 and the motor of comparative example 1 is shown in table 1.In table 1 In, the ratio that the amount of lubricating oil possessed by motor changes before and after the long duration test of motor is shown.

Here, the condition required by above-mentioned conditioned reference freezing equipment.That is, in the freezing equipments such as refrigerator, refrigerator-freezer The motor used requires the driving life-span of more than 50,000 hours.

It is oil-impregnated sintered possessed by motor when the amount of the lubricating oil included in sintered metal bearing is less than ormal weight Bearing produces undesirable condition.

Specifically, when the amount of the lubricating oil included in sintered metal bearing is less than the 80% of the amount being initially impregnated with, Start to produce abnormal sound from motor.It is because because the amount of lubricating oil reduces and causes the pressure drop of lubricating oil to think its reason It is low.

In addition, when the amount of the lubricating oil included in sintered metal bearing is less than the 60% of the amount being initially impregnated with, it is electronic Machine stops.It is to cause to produce lubrication not between axle and sintered metal bearing because of the amount deficiency of lubricating oil to think its reason It is good.

As shown in table 1, the motor shown into embodiment 5 from embodiment 1 is no matter in which embodiment, after experiment Lubricating oil amount exceed experiment before lubricating oil amount 60%.Therefore, embodiment 1 shown into embodiment 5 In the case that motor use is in freezing equipment, no matter in which embodiment motor is all without stopping.Thus, implement No matter the motor that example 1 is shown into embodiment 5 can use in which embodiment in freezing equipment.

Particularly, on embodiment 1 and embodiment 2 shown in motor, before the amount of the lubricating oil after experiment exceedes experiment Lubricating oil amount 80%.Therefore, embodiment 1 and the motor shown in embodiment 2 will not produce abnormal sound from motor.Cause And it is also preferred in terms of quietness to be able to confirm that in the motor shown in embodiment 1 and embodiment 2.

Motor shown in embodiment 1 to embodiment 5 is compared with the conventional motor shown in comparative example 1, axis direction Height can thinning 20% or so.Therefore, if motor shown in using embodiment 1 to embodiment 5, box fan energy Enough realize space saving.

Thus, it is installed on the case of freezing equipment in the box fan for having used the motor shown in embodiment 1 to embodiment 5 In the case of interior, the dead space of accommodation space can not be increased the cold air in case is set efficiently to circulate.

It is if cold as a result, using the box fan that make use of the motor in present embodiment 1 in freezing equipment Freeze equipment and improve cooling performance with can not losing accommodation space.

(embodiment 2)

Figure 14 is the sectional view of the motor in embodiment 2 of the present utility model.Figure 15 is to see from below in fig. 14 Examine the synoptic diagram obtained by the rotor used in the motor in embodiment 2 of the present utility model.

Figure 16 to Figure 18 is to observe to make in the motor in embodiment 2 of the present utility model in fig. 14 from below respectively Enlarged view of the main part obtained by rotor.

Figure 19, Figure 21 are the main of the rotor that illustrates to use in the motor in embodiment 2 of the present utility model respectively Partial enlarged view of the main part.

Figure 20, Figure 22 are to observe to make in the motor in embodiment 2 of the present utility model in fig. 14 from below respectively Enlarged view of the main part obtained by rotor.

Figure 23, Figure 24 are the other rotors for illustrating to use in the motor in embodiment 2 of the present utility model respectively The enlarged view of the main part of major part.

Figure 25 is the main portion sectional view of other motor in embodiment 2 of the present utility model.

In addition, for the motor identical structure in present embodiment 1, mark identical mark, and quote explanation.

As shown in Figure 14, Figure 15, in motor 20b, rotor 7d has more than one recess 26 also on plane 7b. Formed with side 7c on plane 7b.Recess 26 is the depression along axle center 5a directions in the section including axle center 5a.Recess 26 It is the ring-type centered on the 5a of axle center.

In addition, as shown in Figure 16 to Figure 18, recess can also be realized with following shape.I.e., as shown in figure 16, it is recessed Portion 26a can also be realized with the ring-type of ellipse.As shown in figure 17, recess 26b can also be realized with the ring-type of hexagon. In addition, recess 26b can also be realized with the ring-type of polygon.As shown in figure 18, recess 26c also can be with including groove portion 22 ring-type is realized.

In addition, as shown in Figure 19, Figure 20, motor is sometimes with the recessed of the ring-type centered on more than two 5a by axle center Portion 26,26d.In this case, on the plane 7b formed with side 7c, each recess 26,26d centered on the 5a of axle center Internal diameter is different.

In addition, as shown in Figure 21 to Figure 23, motor is sometimes with the ring-type centered on more than two 5a by axle center Recess 26e, 26f.In this case, in the section including axle center 5a, each recess 26e, 26f height from plane 7b Degree is different.

Specifically, as shown in Figure 21, Figure 22, recess 26e, 26f may be integrally formed to be stepped.Or as schemed Shown in 23, recess 26e, 26f can be formed independently of each other.

Also, as shown in figure 24, recess 26e, 26f, 26g can be formed as from the lateral side 7c sides depth shallower of axle 5 It is stepped.Or recess can be formed as deepening from the lateral side 7c sides depth of axle 5 it is stepped.

In addition, as shown in figure 25, in motor 20b, the moulded resin 11 as resin portion is also opposite with plane 7b Face 11a in have convex stage portion 11d, the convex stage portion 11d and recess 26d possessed by plane 7b be opposed to turn into it is convex Rise.

In addition, as shown in figure 14, in motor 20b, rotor 7d, which has, hates oily portion 23.On plane 7b, oily portion 23 is hated Positioned at than recess 26 close to the position of side 7c sides.Oily portion 23 is hated to keep oleophobic agent 25.It is centered on the 5a of axle center to hate oily portion 23 Ring-type.

In addition, as shown in figure 14, second end face 8f be located at the bearing 8 as sintered metal bearing possessed by first end Side opposite face 8e.On motor 20b, by plane 7b between the second end face 8f of the opposed positions of coplanar 7b Distance be set to A1.On motor 20b, the distance between opening portion 10a possessed by plane 7b and housing 10 is set to A2. On motor 20b, the resin portion by side 7c and holding housing 10 is that the distance between surface 11c of moulded resin 11 is set to A3。

Now, distance A1, A2, A3 of rotor 7 are below 1mm.

In addition, as shown in figure 14, in motor 20b, sintered component 24 includes powder 24a and overlay film component 24b.Powder 24a is using iron as principal component.Overlay film component 24b covers powder.Overlay film component 24b includes copper.

If set to this structure, then even in situation about being driven with the downward posture of the vertical of axle 5 to motor 20b Under, the lubricating oil included in bearing 8 can be also stayed in recess 26.I.e. it is capable to prevent the lubrication oil stream included in bearing 8 To the side 7c faces of magnet 6.Therefore, the motor 20b in present embodiment 2 can further suppress the profit included in bearing 8 The leakage of lubricating oil.

As a result, the motor 20b in present embodiment 2 can further obtain the driving life-span of length.

In addition, when being coated with oleophobic agent 25 to magnet 6, recess 26 can prevent oleophobic agent 25 from being flowed to the side of axle 5.Therefore, Recess 26 is also effective to determining the position for being coated with oleophobic agent 25 in the operation of coating oleophobic agent 25.

(embodiment 3)

Figure 26 to Figure 28 is the main of the rotor that illustrates to use in the motor in embodiment 3 of the present utility model respectively Partial enlarged view of the main part.

In addition, for the motor identical structure in present embodiment 1,2, mark identical mark, and quote It is bright.

As shown in Figure 26, Figure 27, in the motor, rotor 7e has more than one convex portion 21 and one on plane 7b Recess 26 above.Formed with side 7c on plane 7b.

Convex portion 21 is the projection along axle center 5a directions in the section comprising axle center 5a.Convex portion 21 be using axle center 5a in The ring-type of the heart.

Recess 26 is the depression along axle center 5a directions in the section comprising axle center 5a.Recess 26 be using axle center 5a in The ring-type of the heart.

In addition, as shown in figure 28, in the motor, rotor 7e has a convex portion 21 and two recesses on plane 7b 26、26d.Formed with side 7c on plane 7b.

Convex portion 21 is the projection along axle center 5a directions in the section comprising axle center 5a.Convex portion 21 be using axle center 5a in The ring-type of the heart.

Recess 26,26d are the depression along axle center 5a directions in the section comprising axle center 5a.Recess 26,26d are with axle Ring-type centered on heart 5a.

As shown in present embodiment 3, above-mentioned embodiment 1 can be applied in combination with embodiment 2.

Explanation more than it is clear that, the motor in embodiment 1 to 3 of the present utility model is in motor There is more than one convex portion and more than one recess in the plane of the middle rotor used.Convex portion and recess can also combine shape Into.

If set to this structure, then no matter motor is installed as which direction axle possessed by motor is, can Lubricating oil is stayed in motor.

Therefore, the motor of this structure can suppress the height of the axis direction of motor body.In addition, the electricity of this structure Motivation can obtain the driving life-span of length.

(embodiment 4)

Figure 29 is the explanation figure for representing the freezing equipment in embodiment 4 of the present utility model.

In addition, for the motor identical structure in present embodiment 1 to 3, mark identical mark, and quote It is bright.

As shown in figure 29, the refrigerator 40 as the freezing equipment in embodiment 4 of the present utility model possesses pressure fan 31 With control unit 32.

Pressure fan 31 has the motor 20 and impeller 30 illustrated in embodiment 1 to 3.Impeller 30 is installed on axle 5.

Control unit 32 is driven to pressure fan 31.

If set to the refrigerator of this structure, then the motor that can obtain illustrating in embodiment 1 to 3 is played a part of Effect.

Therefore, the motor in embodiment 1 to 3 of the present utility model, the wind in the case for be installed on freezing equipment In fan, high efficiency and the miniaturization of motor can be realized.

In addition, the motor in embodiment 1 to 3 of the present utility model, the wind in the case for be installed on freezing equipment In fan, it can be ensured that long driving life-span and high reliability.

Industrial applicability

In receiving room possessed by motor of the present utility model freezing equipment such as can be used in refrigerator, refrigerator-freezer The box fan of installation.

Description of reference numerals：

1：Stator core；2：Insulating part；3：Stator winding；4、101：Stator；5：Axle；5a：Axle center；5b：Outer diameter face；6：Magnetic Body；6b：Aperture surface；7、7d、7e、102：Rotor；7a：Pivot；7b：Plane；7c：Side；8：Bearing (oil-impregnated sintered axle Hold)；8a：First sliding contact portion (sliding contact portion)；8b：Second sliding contact portion (sliding contact portion)；8c：Outer peripheral face；8d： Inner peripheral surface；8e：First end face；8f：Second end face；9、116：Thrust plate；10：Housing；10a：Opening portion；10b：Cylindrical portion； 10c：Inner surface；11：Moulded resin (resin portion)；11a：Face；11b：Concavity stage portion；11c：Surface；11d：Convex step Portion；12、115：Housing；13：Connector；13a：Lead；14：Circuit layout card；20、20a、20b、120：Motor；21、21a、 21b、 21c、21d、21e、21f、21g：Convex portion；22：Groove portion；23：Hate oily portion；24：Sintered component； 24a：Powder；24b：Cover Film structural component；25：Oleophobic agent；26、26a、26b、26c、26d、26e、 26f、26g：Recess；30：Impeller；31：Pressure fan；32：Control Portion processed；40：Refrigerator (freezing equipment)； 103、104：Holding unit；111：Cover at bottom；112：Bearing；113：Spring；114：Felt.

Claims (13)

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

Stator, its stator winding that there is stator core and be wound in the stator core；

Axle, it extends using pivot as axle center on axis direction；

Rotor, it is positioned at the position opposed with the stator and is installed on the axle, and the rotor has plane and side, described flat Face upwardly extends in the side intersected with the axle center, and the side includes magnetic component, on the plane along the axle center Extension；

Sintered metal bearing, it includes sintered component, and supports the axle in a manner of the axle rotates freely, and this is oil-impregnated sintered Bearing has outer peripheral face, inner peripheral surface and a first end face, and the outer peripheral face is positioned at the position opposite with the side and along institute Axle center to be stated to be formed, the inner peripheral surface is located to be formed close to the position of the axle side and along the axle center than the outer peripheral face, Include multiple sliding contact portions for contact with the axle on the surface of the inner peripheral surface, the first end face by the outer peripheral face and The inner peripheral surface connection, positioned at the end of a side of the sintered metal bearing on the axis direction；

Housing, it has opening portion and cylindrical portion, a side of the opening in the housing on the axis direction, institute Stating cylindrical portion includes the inner surface opposite with the outer peripheral face and the first end face, and extends along the axle center；And

Resin portion, it keeps the stator and the housing,

The rotor has the more than one ring centered on the axle center also in the plane formed with the side The convex portion of shape, the convex portion are in the projection along the axis direction in the section comprising the axle center.

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

In the case of the convex portion with more than two ring-types centered on the axle center, in the institute formed with the side State in plane, the internal diameter centered on the axle center of each convex portion is different.

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

In the case of the convex portion with more than two ring-types centered on the axle center, the section in the axle center is being included In, the height from the plane of each convex portion is different.

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

The rotor has the more than one ring centered on the axle center also in the plane formed with the side The recess of shape, the recess are in the depression along the axis direction in the section comprising the axle center.

5. motor according to claim 4, it is characterised in that

In the case of the recess with more than two ring-types centered on the axle center, in the institute formed with the side State in plane, the internal diameter centered on the axle center of each recess is different.

6. motor according to claim 4, it is characterised in that

In the case of the recess with more than two ring-types centered on the axle center, the section in the axle center is being included In, the depth from the plane of each recess is different.

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

The resin portion has concavity stage portion, the concavity stage portion and the plane also on the face opposite with the plane Possessed convex portion is opposed to turn into depression.

8. motor according to claim 4, it is characterised in that

The resin portion has convex stage portion, the convex stage portion and the plane also on the face opposite with the plane Possessed recess is opposed to turn into projection.

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

The rotor also has an oily portion of hating of ring-type centered on the axle center on the plane, it is described hate oily portion be located at than The convex portion keeps oleophobic agent close to the position of the side.

10. motor according to claim 4, it is characterised in that

The rotor also has an oily portion of hating of ring-type centered on the axle center on the plane, it is described hate oily portion be located at than The recess keeps oleophobic agent close to the position of the side.

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

Distance between second end face possessed by the plane and the sintered metal bearing is being set to A1, by the plane With the housing possessed by the distance between the opening portion be set to A2, by the side and the tree for keeping the housing When the distance between the surface in fat portion is set to A3, described A1, A2, A3 of the rotor are below 1mm, wherein second end Face is located at and position that the plane is opposed and is located at the side opposite with the first end face.

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

The sintered component includes powder and covers the overlay film component comprising copper of the powder.

13. a kind of freezing equipment, it is characterised in that possess：

Pressure fan, its impeller that there is motor according to claim 1 and be installed on the axle；And

Control unit, it is driven to the pressure fan.