CN101443983B

CN101443983B - Direct drive motor in washing machine

Info

Publication number: CN101443983B
Application number: CN2005800457980A
Authority: CN
Inventors: 金赫德; 郑然秀
Original assignee: LG Electronics Inc
Current assignee: LG Electronics Inc
Priority date: 2004-11-09
Filing date: 2005-11-08
Publication date: 2012-05-23
Anticipated expiration: 2025-11-08
Also published as: KR20060041562A; CN101443983A; KR101100168B1

Abstract

An object of the present invention is to provide a direct drive motor in a washing machine, in which a structure of a driving unit in a washing machine is improved to improve processability, and current flow down to the washing shaft is cut off even if insulation between the winding portion of the stator and the rotor is broken, for preventing accidents caused by negligence of safety from taking place. To achieve the object of the present invention, the present invention provides a direct drive motor in a washing machine includes a stator (14) having a winding portion with coils wound thereon, a rotor (13) fixedly connected to a washing shaft 4 for direct drive of a drum, the rotor (13) having a sidewall (13b), and a rear wall (13a) with a pass through hole (131) at a center, and a connector (16) of a material having a vibration mode different from the washing shaft, insert molded at the center of the rear wall (13a) of the rotor to form one body with the rotor, and fixedly connected to the washing shaft to connect the rotor to the washing shaft, and support the washing shaft.

Description

The direct drive motor that is used for washing machine

Technical field

The present invention relates to washing machine, more particularly, relate to a kind of direct drive motor that can be applicable in drum type washing machine and the similar washing machine.

Background technology

Usually; Impeller type washing machine under the control of microcomputer, confirm the type and quantity of clothing through transducer after, automatic setting washing methods in view of the above; According to the type of clothing and the washings of quantity supply proper level; By means of the emollescence of washing agent, the friction of the recirculated water that causes along with the rotation of impeller, and impeller is accomplished washing to the impact of clothing from clothing and the bedding dirt that gets on.

On the other hand; Drum type washing machine is placing washing agent, washings and clothing under the situation in the cylinder; Friction through between the cylinder that utilizes clothing and rotate by means of the actuating force of motor comes washing clothes; This washing machine causes damage hardly to clothing, and clothing is twined, and has the clean result of impacting and rubbing clothing.

Below with reference to Fig. 1 existing drum type washing machine is described briefly.

Fig. 1 is the longitdinal cross-section diagram of existing drum type washing machine, and this washing machine has the bucket 2 in casing 1 and is installed in rotation on the cylinder 3 of the middle body of bucket 2.

Below bucket 2, be provided with motor 5a, this motor has through axle and is coupled motor pulley 18 on it, is provided with the drum shaft that is installed on the cylinder and has the drum pulley 19 that is coupled on the cylinder at the rear portion of cylinder 3.

In view of the above, when through belt 20 drum pulley on the drum shaft 19 being connected with the motor pulley that is coupled to motor 5a 18, power transmitting elements will be delivered to cylinder 3 from the actuating force of motor through belt 20.

Door 21 and be installed in door 21 and the packing ring 2 of bucket between 2 is installed in the front of casing 1.

Simultaneously; Between the upside of the outer periphery of the downside on casing 1 top and bucket 2, be provided with the suspention spring 23 that is used for suspending in midair bucket, and between the downside of the outer periphery of the bottom of casing 1 and bucket 2, be provided with a vibration absorber 24 that reduces the vibrations that bucket 2 produces when being used for drying (spinning).

But; Because existing washing machine structure is through motor pulley 18, drum pulley 19 and the belt 20 that connects motor pulley 18 and drum pulley 19 actuating force to be delivered to cylinder 3 from motor 5a, existing washing machine has following shortcoming.

At first, because actuating force is not to be directly delivered to cylinder 3, but transmit produce power loss in the actuating force transmittance process through the belt on motor pulley 18 and drum pulley 19 20.

In addition, because actuating force is not to be directly delivered to cylinder 3, but, in transmission of power, produce very big noise through like a lot of parts transmission such as motor pulley 18, drum pulley 19, belt 20.

Need actuating force to be delivered to cylinder 3 from motor 5a, therefore increased the man-hour of product assembling like a lot of parts such as motor pulley 18, drum pulley 19, belt 20.

In addition, actuating force is delivered to cylinder 3 from motor 5a and needs a lot of parts, number of times and frequency that this breaks down increase.

In brief, utilize motor pulley, drum pulley and belt that a lot of troubles and noise might be appearred in actuating force from motor 5a indirect transfer to cylinder 3, have a lot of energy dissipation factors, and reduced washability.

Moreover stainless steel cask 2 costs of existing drum type washing machine are high, machinability difference and very heavy.

Simultaneously; Although existing people has proposed to replace using belt and belt pulley indirectly actuating force to be delivered to the drum type washing machine system of the direct driving of cylinder from motor, the shortcoming that this system has is the concentricity that the stator of damage or the distortion of the standing part that causes owing to the vibrations by the motor rear wall that causes directly being fixed on barrel can not keep stator.

In addition,, separate under the situation about making, not only be difficult to assembling at bearing housing and bucket in order to solve said problem, and owing to whole bearing housing makes assembly occupy very big space from bucket is outstanding.Under the situation of bearing housing,, and only supported this fixing influence that shakes of being vulnerable to very much because bearing housing is not whole supported by part in a side by screw or bolt.And, because not only bearing itself needs complicated water conservation structure, and between bucket and bearing, also needing complicated water conservation structure, there is the defective of manufacture view in this structure.

In a word; This bearing housing need have the inner collar and the outer collar of the parts that separate that are used for supporting installation bearing within it, because independent permanent magnet, steel plate and the rear portion yoke (back yoke) at steel plate rear side place makes that the manufacture difficulty of rotor is very big.

Simultaneously; The drum type washing machine of this direct driving is very possible because the insulation damages between the winding part of stator and rotor causes electric current to flow in the washings in the bucket, but also has the problem that causes reducing the operability of assembly line and productivity ratio aspect because of the connector of making separately and installation is used for the rotation transmission from the motor to the wash shaft.

Summary of the invention

Technical problem

An object of the present invention is to provide a kind of direct drive motor that is used for washing machine; Wherein the structure of driving unit in the drum type washing machine is improved; Make and can actuating force be directly delivered to cylinder so that reduce noise, minimizing fault and energy dissipation factor from motor; Even the insulation damages between the winding of stator part and the rotor can be cut off the electric current that flows to wash shaft, to prevent accident occurring owing to ignoring safety.

Another object of the present invention provides a kind of direct drive motor that is used for washing machine, wherein in the process of making rotor, does not need the independent installation connector, thereby can boost productivity and fail safe.

Technical scheme

Said purpose of the present invention can realize that this motor comprises through a kind of like this direct drive motor is provided in washing machine: the stator 14 that is wound with the winding part of coil above having; Be fixedly connected to wash shaft 4, be used for the rotor 13 of direct head roll, rotor 13 has the rear wall 13a that sidewall 13b and center have through hole 131; With connector 16; This connector in the center of the rear wall 13a of rotor and constitute integratedly with rotor, and is fixedly joined to wash shaft so that rotor is connected to wash shaft and supports wash shaft by the material insert molding with vibrating mode different with wash shaft (insert molded).

Preferred rotor 13 is formed by the steel plate compacting, makes sidewall 13b and rear wall 13a become one.The through hole 131 of the rear wall 13a center of preferred rotor 13 is formed on the center of hub (hub) 132, and this hub is the part that protrudes from stator side or protrude from the direction relative with adjacently situated surfaces.

Preferably, even wash shaft 4 is processed by conducting metal, connector 16 also is made up of resin, so that insulation between wash shaft 4 and the rotor 4.

Preferred connector 16 comprises and is positioned at the lip-deep zigzag part 164 of inner peripheral that the shape of this zigzag part is consistent with the shape of the zigzag part 400 of the rearward end office of wash shaft 4.Connector 16 also comprises the ribs 161 of the intensity that is used to strengthen connector 16.

Combine between rotor 13 and the connector 16 firmly for making; Preferred rotor 13 comprises that at least one is positioned near the intercommunicating pore the through hole 131; Be used for when the insert molding connector, strengthening the adhesion between resin connector 16 and the rotor, so that strong bonded between rotor 13 and the connector 16.

Can be in rotor with connector 16 insert moldings, make connector 16 cover near the front and rear surfaces of through hole 131 of inboard and the rotor of through holes 131.Through hole 131 in the rotor 13 has along the bonding pad 210 of the length direction protrusion of wash shaft 4, so that when the insert molding connector, strengthen the adhesion between resin connector 16 and the rotor 13.

Rear wall 13b has at least one through hole 131 in the rotor 13, along the bonding pad 211 of the length direction protrusion of wash shaft 4, so that when the insert molding connector, strengthen the adhesion between resin connector 16 and the rotor 13.

Another aspect of the present invention provides a kind of direct drive motor that is used for washing machine, and this motor comprises: the stator 14 that is wound with the winding part of coil above having; Be fixedly connected to wash shaft 4, be used for the rotor 13 of direct head roll, rotor 13 has sidewall 13b and the rear wall 13a that forms as one through presed-steel plate, and the center of rear wall 13a has through hole 131; And the connector of processing by the resin insert molding 16; Causing connector 16 to be incorporated into inside includes on the inboard and the outside of rear wall 13a of rotor of intercommunicating pore 137; Thereby be integrally formed and be fixedly connected to wash shaft with rotor, rotor be connected to wash shaft and support wash shaft.

Another aspect of the present invention provides a kind of direct drive motor that is used for washing machine, and this motor comprises the stator 14 of the winding part that is wound with coil above having; Be fixedly connected to metal wash shaft 4, be used for the magnetic metal rotor 13 of direct head roll, rotor 13 has the rear wall 13a that sidewall 13b and center have through hole 131; And in the center of the rear wall 13a of rotor 16 by the connector 16 that is used to make the resin insert molding that insulate between wash shaft and the rotor to process, so that this connector is integrally formed and makes wash shaft to be connected with rotor with rotor.

Beneficial effect

The direct drive motor that is used for washing machine of the present invention has the following advantages.

This direct drive motor can provide have low noise, fault is few and kinetic equation loss is little drum type washing machine, and the rotor with the steel plate that can suppress of good processability can shorten manufacturing time, thereby the productivity ratio of drum type washing machine is improved.

Have the connector different and can reduce the vibrations of passing to wash shaft from rotor with the vibrating mode of rotor; Even rotor and wash shaft are processed by conductive metallic material; The connector that is made up of resin also can make between rotor and the wash shaft and insulate, and can prevent the generation of electric shock accidents whereby in advance.

Particularly rotor and connector are processed the quantity that one can reduce parts, shorten and assemble man-hour, therefore can boost productivity through insert molding.

Description of drawings

Be used for further understanding accompanying drawing of the present invention and show some embodiments of the present invention, these accompanying drawings are used to explain principle of the present invention with the specification word segment.In the accompanying drawing;

Fig. 1 is the sketch map of the drum type washing machine of existing direct driving;

Fig. 2 is the sketch map of drum type washing machine of the direct driving of one embodiment of the present invention;

Fig. 3 is the longitudinal sectional drawing of " A " part among Fig. 2, and it shows the driver element of the drum type washing machine of one embodiment of the present invention;

Fig. 4 is the zoomed-in view of " B " part among Fig. 3;

Fig. 5 is the perspective view of rotor shown in Figure 3, has cut a part among the figure;

Fig. 6 is a bottom perspective view shown in Figure 5;

Fig. 7 is the perspective view of stator shown in Figure 3;

Fig. 8 is the longitudinal profile enlarged drawing of the key component of the driver element of the drum type washing machine of another preferred embodiment of the present invention;

Fig. 9 is the longitudinal profile enlarged drawing of the key component of the driver element of the drum type washing machine of the another preferred embodiment of the present invention.

Embodiment

To describe preferred embodiments more of the present invention at present in detail, some instances be shown in accompanying drawing 2 to 11.

Fig. 2 shows the drum type washing machine of the direct driving of first preferred embodiment of the invention, and Fig. 3 shows the details of " A " part among Fig. 2, and Fig. 4 is the zoomed-in view of " B " part among Fig. 3.

Fig. 5 is the perspective view of rotor shown in Figure 3, has removed partial view among the figure; Fig. 6 is a bottom perspective view shown in Figure 5; Fig. 7 is the perspective view of stator shown in Figure 3.

The drum type washing machine of present embodiment comprises the bucket 2 that is in the casing 1, be in cylinder 3 in the bucket 2, linking to each other with cylinder 3 is used for the lip-deep bearing of outer periphery that power is delivered to the wash shaft 4 of cylinder 3 and is in the opposite end of wash shaft 4 from motor 5.

Bucket 2 is made of plastics, and metal bearing housing 7 is set at the center of the rear wall 200 of bucket 2, on the outer periphery surface with the opposite end that bearing is supported on wash shaft 4.

Metal bearing case 7 is inserted in the injection mo(u)lding module (injection molding) of Plastic Drum 2, and bearing housing 7 is become one at rear wall and this bucket of bucket 2.

Bearing housing 7 is preferably made of aluminum.

In addition, bearing housing 7 has lip-deep step 8a of the inner peripheral that is positioned at bearing housing 7 and 8b, so that support fore bearing 6a and rear bearing 6b respectively, and prevents that said bearing from deviating from bearing housing 7.As for lip-deep step 8a of the inner peripheral of bearing housing 7 and 8b; Step 8a in the front side has

shape; To form the structure of the rear end of supporting fore bearing 6a; And have

shape at the step 8b of rear side, to form the structure of the front end that supports rear bearing 6b.

Being used in bearing housing 7 is delivered to power on the outer periphery surface of wash shaft 4 of cylinder 3 from motor 5, be provided with the positioning step 9a and the 9b that are positioned at its front side and rear side, so that fore bearing 6a and rear bearing 6b are positioned on the wash shaft 4.

Wash shaft 4 also has the front end on the support 10 on the rear wall that is firmly fixed at cylinder 3; The expose portion from the wash shaft in the rear end of support 10 4 that brass 11 is press fit over wash shaft 4 begins to the zone of fore bearing 6a; Preventing that wash shaft 4 from getting rusty, and on the outside of axle bush 11, be provided with seal 12 and prevent infiltration.

The stator 14 that direct drive motor 5 on the inboard of rotor 13 and the rotor 13 of the rear wall 200 that is fixed to bucket 2 of direct drive motor 5 at center of rear end part of wash shaft of being coupled to 4 is arranged simultaneously.

With reference to figure 5 to 7; The rotor 13 that preferably is made up of steel plate comprises sidewall 13b and the hub 132 that extends forward from the periphery of rear wall 13a, and said sidewall has the sweep that along the circumferential direction forms, and has the support surface 130 that is used to support the lip-deep magnet 13c of the inner peripheral that is installed in sidewall 13a; Said hub is in rear wall 13a center; Hub has the through hole 131 that is formed at wherein, passes with the threaded portion of permission like the fixture 15b of bolt and so on, and rotor 13 and wash shaft 4 are coupled.

Preferably form rotor 13 through compacting.

Hub 132 around rotor 13 is provided with a plurality of cooling fins 133 that form along radial direction, so that when rotor 13 rotates, air is blowed to stator 14, and makes the heat cooling from stator 14, and each cooling fins has predetermined length along radial direction.

Through oxygen cutting formation cooling fins 133, cooling fins 133 is spent to opening portion crooked 90 from rear wall, the through hole 134 that forms through the oxygen cutting is used as ventilation hole.

Simultaneously, embossing part 135 is arranged to strengthen rotor 13 between the adjacent cooling fins 133 on the rear wall 13a of rotor 13, each embossing partly has the osculum 136 that is used for draining.

Rotor 13 has the through hole 131 that is in hub 132 centers, be formed from a resin, have connector 16 clipped objects different and be molded on the edge of through hole 131 and become one with rotor 13 with the vibrating mode of wash shaft 4.

Therefore, when assembling this drum type washing machine at the scene, do not need more assembly working as the rotor 13 and the connector 16 of one manufacturing, thereby can boost productivity.

The straight part of preferred through hole 131 along the direction of passage of through hole 131, promptly in fact identical direction with the length direction of wash shaft just before/rear is to formation.

In order to improve the adhesion between resin and the rotor 13 when the insert molding connector 16, preferably the through hole 131 around rotor 13 forms at least one intercommunicating pore 137.

Connector 16 has zigzag part 164 and ribs 161; Said indented portion branch is on the inner peripheral surface of hub 163 and is consistent with zigzag part 400 shapes on the rear end of wash shaft 4, and ribs is on the outside of hub 163 of connector 16 in order to strengthen hub 163.

But connector 16 vibration-inhibitions of the vibrating mode that the rotor that constituted, have and be made up of steel plate by resin 13 is different are delivered to wash shaft 4 and as the axle bush of rotor from rotor.

The material of rotor is not limited to steel plate, also can use other magnetic metals.Usually, consider intensity and machinability, wash shaft also can be made up of metal.

Like this; On have, be wound with the winding part that is used for the coil that electric current flows stator and through and the rotor that rotates of the electromagnetic action of stator between the situation of insulation damages under; Electric current flows to wash shaft probably, causes finally to cause getting an electric shock through the washings in the bucket.

Yet,,, can avoid owing to ignoring the accident that safety causes because connector 16 is by resin, is that insulating material is processed that it can cut off the electrical connection between wash shaft 4 and the rotor 13, thereby can prevent current direction wash shaft 4 referring to figs. 3 to 6.

Simultaneously; On the rear wall 200 of bucket 2, be provided with and be used for bearing housing 7 is inserted the hub 201 in the injection mo(u)lding module of bucket, and be provided with in the outside of hub 201 with clocklike form at interval in a circumferential direction be used for stator 14 is fixed firmly to the fastening boss 202 on the rear wall 200 of bucket 2 through fixture 15a.

Be provided with between the rear wall 200 of bucket 2 and the stator 14 shape almost with the profile phase of the rear wall 200 of bucket with, be fixed to the strutting piece 17 on the rear wall 200 of bucket when being used for stator 14 is being installed, so that support stator 14 and keep the concentricity of stator 14.

Inboard front side that closely contact that strutting piece 17 has a rib 203 on the rear wall 200 with bucket and the rear side that closely contacts with the outer periphery of the rear end of bearing housing 7, but it is by the hub encirclement, but come out from hub 201 in the center of the rear wall 200 of bucket.

For strutting piece 17 rear wall 200 with bucket is coupled together, a plurality of fixture 15d is fastened to outer periphery surface inboard of strutting piece 17 and is fastened on the hub on the rear wall of bucket 204.For stator 14 is fixed on the strutting piece 17, on the inboard of the circumferencial direction of fixture 15a, used other fixture 15a.

Simultaneously; With reference to figure 3 and 8; The stator 14 of motor 5 comprises the coil 142 on the winding part in the annular framework 140 and the outside that is wrapped in framework 140, also has on the inboard that is formed on framework 140 as one, is used for stator 14 is fixed to the fastening rib 143 on the rear wall 200 of bucket.

Hereinafter will be described the operation of drum type washing machine of the present invention.

Under the control of motor driving controller (not shown) when sequence of currents flows to the coil 142 on the stator 14 rotor 13 begin to rotate; Rotate with the wash shaft with zigzag part 4 that the connector that is integrally formed through insert molding and rotor 16 is coupled; In view of the above rotatory force is delivered to cylinder from rotor through wash shaft 4, cylinder 3 is rotated.

Operation below this moment the drum type washing machine with driver element of the present invention being implemented.

Because it is very light and have a good machinability that bucket 2, has the structure of the bucket 2 that the plastics of good heat-resistant process for injection mo(u)lding.

Because at high temperature bearing housing 7 can not be out of shape, by like the structure of the metal bearing housing 7 of aluminium alloy and so on even can be applied to have the drum type washing machine of drying program.

Make it to save the step of independent installation bearing housing 7 on the rear wall 200 of bucket 200 when bucket 2 being carried out injection mo(u)lding in the hub 200 of the rear wall 200 of insertion bucket with the metal bearing case of a unit of bucket 2 formations with plastics.

Therefore, can further simplify assembling process, and then reduce and assemble required man-hour.The inside of the bearing housing 7 at the front side peripheral surface of the

shaped steps 8a and at its rear side of the

shaped benches can be supported by the front bearing 6a, 6b back end and the front end of the rear bearing.

That is to say, but step 8a and 8b block bearing 6a and 6b on the surperficial opposite side of the inner peripheral of metal bearing case make it can not come off out from bearing housing 7.

In addition, the lip-deep positioning step 9a of preceding and back outer periphery and the 9b that power are delivered to the wash shaft 4 of cylinder 3 from motor 5 can be positioned fore bearing 6a and rear bearing 6b for wash shaft 4 easily being used in being installed in bearing housing 7.

Simultaneously, be fixed to the front end of wash shaft 4 on the support 10 on the rear wall of cylinder 3 and will be used to prevent that brass 11 that wash shaft 4 is got rusty from pressing fit over from the expose portion in the wash shaft 4 at the rear portion of support 10 begins can prevent on the zone on the wash shaft 4 of fore bearing 6a that wash shaft 4 from getting rusty.

Seal 12 anti-sealings on the outside of axle bush 11 permeate to bearing.

The rotor 13 of direct drive motor 5 is coupled to the center of the rear end part of wash shaft 4; And stator 14 is on the inboard of rotor 13; Its rotor 13 has the circumferential preceding sidewall 13b that extends from rear wall 13a, and rear wall has the sweep that along the circumferential direction forms, and has support surface 130; Be installed in the lip-deep magnet 13c of inner peripheral of sidewall 13a with supporting, can make rotor easily whereby.

The hub 132 that has formation through hole 131 within it in the center of the rear wall 13a of rotor 13 can make the threaded portion like the fixture 15b of bolt and so on pass through; So that rotor 13 is coupled to wash shaft 4; When rotor 13 rotated, a plurality of cooling fins 133 (its each all form by predetermined length along radial direction) can blow to stator 14 with the heat of reduction from stator 14 with air.

Opening direction along rotor 13 utilizes the oxygen cutting to form cooling fins 133, and the through hole 134 that utilizes the oxygen cutting to form plays ventilation hole.

The rotor 13 that preferably forms through presed-steel plate can significantly shorten the time of making rotor 13, thereby can boost productivity.

Simultaneously, the connector that utilizes insert molding and rotor to form as one can omit the additional step that connector and rotor set are fitted together, thereby can improve the productivity ratio of making rotor.

The connector 16 that utilizes insert molding and rotor to form as one has the vibrating mode different with the metallic rotator 13 that is preferably steel plate, therefore shock transfer can weakened the vibrations from rotor 13 before to wash shaft 4.

Because by resin, a kind of insulating material constitute and and the connector 13 that becomes one of rotor 4 be in usually between the wash shaft 4 and rotor 4 that constitutes by metal material; Make insulation between rotor 4 and the wash shaft 4; So can prevent owing to the caused accident of neglect of safety, and then can protect the user.

Simultaneously, in fact the chimeric of zigzag part 400 on the rear end part of lip-deep zigzag part 164 of the inner peripheral of the hub 163 of connector 16 and wash shaft 4 can be delivered to wash shaft 4 from rotor 13 through connector 16 with rotatory force.

Ribs 161 on hub 163 outsides of connector 16 has strengthened the intensity of connector.

Simultaneously, the embossing part 135 between each the adjacent cooling fins 133 on the rear wall 13a of rotor 13 has improved the integral rigidity of rotor 13, and the osculum 136 in embossing part 135 can be used to discharge water.

The fastening boss 202 that along the circumferential direction is positioned at regular intervals on hub 201 outsides can be used for stator 14 is fixed on the rear wall 200 of bucket 2.Between the rear wall 200 and stator 14 of bucket 2, have almost strutting piece 17 support stator 14 of identical shaped with the profile of the rear wall 200 of bucket, as to be used for when stator 14 is installed, being fixed in bucket rear wall 200 and can keep the concentricity of stator.

That is to say; In case strutting piece 17 through fixture 15a be secured to the bucket rear wall 200 on the fastening boss 204 of strutting piece on; The outside of strutting piece 17 closely contacts with the inboard of rib 203 on the rear wall 200 of bucket, and the inboard of strutting piece 17 closely contacts with the outer periphery of bearing housing 7 rear ends, and it is not by hub 201 encirclements; But come out from hub 201, thereby supporting stator 14 and the concentricity that keeps stator in the center of the rear wall 200 of bucket.

Be used for mode of the present invention

Hereinafter will be described with reference to figure 8 and 9 pairs of another embodiment of the present invention.

Fig. 8 is the longitudinal profile enlarged drawing of the key component of the driver element in the drum type washing machine of another preferred embodiment of the present invention.

With reference to figure 8, this direct drive motor comprises the stator 14 of the winding part that is wound with coil above having; Be fixedly connected to wash shaft 4 and be used for the rotor 13 of direct head roll, this rotor has sidewall 13b and the rear wall 13a that is integrally formed through presed-steel plate, and the center of rear wall 13a has through hole 131; And be formed into and rotor all-in-one-piece connector 16 through insert molding by resin; Make connector 16 combine, and be fixedly joined to wash shaft rotor be connected to wash shaft and support wash shaft with the inboard and the outside of rotor of intercommunicating pore 137 in including the rear wall 13a that is in rotor.

That is to say that in the insert molding of connector 16 and rotor 13, resin not only injects in the intercommunicating pore 137, and cover rotor through hole 131 near.

Therefore, by making the combination between connector and the rotor more firm as the connector of one and the structure of rotor.

Simultaneously, Fig. 9 is the longitudinal profile enlarged drawing of the key component of the driver element in the drum type washing machine of the another preferred embodiment of the present invention, and except that rotor 13 comprises the bonding pad, other are identical with previous embodiment.

That is to say that different with other embodiment is, intercommunicating pore 137 was opened with through hole in 131 minutes in the rotor, and rotor comprises along the bonding pad 210 and 211 of the length direction protrusion of wash shaft.Said protrusion direction can be front direction or the posterior direction on the length direction.

Preferably at the hub place, preferably form at least one bonding pad 210 at through hole 131 places.Certainly, also can form two bonding pads 210 and 211 and perhaps can not form bonding pad.

Be delivered to through connector 16 structure of wash shaft 4 from rotor 13 in rotatory force, the combination between rotor 14 and the connector 16 can become more firm through bonding pad 210 and 211.

Simultaneously, though not shown, certainly, do not establish intercommunicating pore in the rotor and can carry out insert molding yet, so that resin covers near front surface of the through hole of rotor hub dish and surface, back.

The present invention is not limited to said embodiment, under the prerequisite that does not exceed the scope of the invention, can be in size, and a lot of conversion are made in shape and material aspect.

Industry is practical gives birth to

The direct drive motor that is used for washing machine of the present invention can provide have low noise, fault is few and power loss is little drum type washing machine, improved the formability when making rotor, and the vibrations of rotor reduced.

In addition; Rotor with presed-steel plate of good processability can shorten the drum type washing machine that manufacturing time also can provide the productivity ratio with raising; Connector with the vibrating mode that is different from rotor can reduce to be delivered to from rotor the vibrations of wash shaft, and strutting piece effectively support stator and the concentricity that keeps stator.

Claims

1. direct drive motor that is used for washing machine comprises:

Be wound with the stator (14) of the winding part of coil above having;

Be fixedly connected to the rotor (13) that wash shaft (4) is used for direct head roll, this rotor (13) has the rear wall (13a) that sidewall (13b) and center have through hole (131); And

The connector (16) that forms in the center clipped object mold pressing of the said rear wall (13a) of said rotor by material with vibrating mode different with said wash shaft; Itself and said rotor form as one and are fixedly joined to said wash shaft, so that connect said rotor and said wash shaft and support said wash shaft.

2. direct drive motor as claimed in claim 1, wherein, said rotor (13) is formed by the steel plate compacting, and said sidewall (13b) and rear wall (13a) are formed as one.

3. direct drive motor as claimed in claim 2; Wherein, Said through hole (131) in the center of the said rear wall (13a) of said rotor (13) is formed on the center of hub (132), and this hub is the part that protrudes from stator side or the edge direction protrusion relative with neighbouring surface.

4. direct drive motor as claimed in claim 3, wherein, said wash shaft (4) is made of metal, and said connector (16) is formed by the resin that makes insulation between said wash shaft (4) and the said rotor (4).

5. direct drive motor as claimed in claim 4; Wherein, Said connector (16) comprises and is in the lip-deep zigzag of inner peripheral part (164), and the shape of this zigzag part and the zigzag of the rearward end office of said wash shaft (4) the partly shape of (400) are consistent.

6. direct drive motor as claimed in claim 5, wherein, said connector (16) also comprises the ribs (161) of the intensity that is used to strengthen said connector (16).

7. direct drive motor as claimed in claim 4; Wherein, said rotor (13) comprises that at least one is near the intercommunicating pore that said through hole (131) is, be used for when the said connector of insert molding, strengthening the adhesion between said connector (16) and the said rotor.

8. direct drive motor as claimed in claim 7; Wherein, Said connector (16) clipped object is molded in the said rotor, makes said connector (16) cover near the front surface and surface, back of said through hole (131) of the inboard and said rotor of said through hole (131).

9. direct drive motor as claimed in claim 7; Wherein, Said through hole (131) in the said rotor (13) has along the bonding pad (210) of the length direction protrusion of said wash shaft (4), is used for when the said connector of insert molding, strengthening the adhesion between said connector (16) and the said rotor (13).

10. direct drive motor as claimed in claim 4; Wherein, Said rear wall (13b) has at least one bonding pad (211) around the length direction protrusion of the interior said through hole (131) of said rotor (13), the said wash shaft in edge (4), is used for when the said connector of insert molding, strengthening the adhesion between said connector (16) and the said rotor (13).

11. a direct drive motor that is used for washing machine comprises:

Be wound with the stator (14) of the winding part of coil above having;

Be fixedly connected to wash shaft (4), be used for the rotor (13) of direct head roll; This rotor (13) has sidewall (13b) and the rear wall (13a) that utilizes presed-steel plate to form as one; And has through hole (131) in the center of said rear wall (13a); Wherein, said rotor (13) comprises that at least one is near the intercommunicating pore of said through hole (131); And

The connector of processing by the resin insert molding (16); Make this connector (16) be bonded on the inboard and the outside of rear wall (13a) of said rotor that inside comprises said intercommunicating pore (137); To form as one with said rotor and to be fixedly joined to said wash shaft and said rotor is connected with said wash shaft and supports said wash shaft

Said intercommunicating pore is set for the adhesion that when the said connector of insert molding, strengthens between said connector (16) and the said rotor.

12. direct drive motor as claimed in claim 11, wherein, said wash shaft (4) is made of metal, and said connector (16) is made up of the resin that makes insulation between said wash shaft (4) and the said rotor (13).

13. direct drive motor as claimed in claim 12; Wherein, Said connector (16) comprises and is in the lip-deep zigzag of inner peripheral part (164), and the shape of this zigzag part is with partly the shape of (400) is consistent in the zigzag of the rearward end office of said wash shaft (4).

14. direct drive motor as claimed in claim 13, wherein, said connector (16) comprises the ribs (161) of the intensity that is used to strengthen said connector (16).

15. direct drive motor as claimed in claim 11; Wherein, The said through hole (131) that is in the said rotor (13) has along the bonding pad (210) of the length direction protrusion of said wash shaft (4), so that strengthen the adhesion between said connector (16) and the said rotor (13) during the said connector of insert molding.

16. direct drive motor as claimed in claim 11; Wherein, Said rear wall (13b) has at least one bonding pad (211) around the length direction protrusion of the interior said through hole (131) of said rotor (13), the said wash shaft in edge (4), so that when the said connector of insert molding, strengthen the adhesion between said connector (16) and the said rotor (13).

17. a direct drive motor that is used for washing machine comprises:

Be wound with the stator (14) of the winding part of coil above having;

Be fixedly connected to metal wash shaft (4), be used for the magnetic metal rotor (13) of direct head roll, this rotor (13) has sidewall (13b) and has the rear wall (13a) of through hole (131) in the center; And

By the resin that insulate between said wash shaft and the said rotor being processed and clipped object is molded to the connector (16) of center of the rear wall (13a) of rotor (16), so that be integrally formed and make said wash shaft to be connected with said rotor with said rotor.

18. direct drive motor as claimed in claim 17; Wherein, Said rotor (13) comprises near at least one intercommunicating pore said through hole (131), so that when the said connector of insert molding, strengthen the adhesion between said connector (16) and the said rotor.

19. direct drive motor as claimed in claim 18; Wherein, Said connector (16) clipped object is molded in the said rotor, makes said connector (16) cover near the front surface and surface, back of said through hole (131) of the inboard and said rotor of said through hole (131).