CN1888196A

CN1888196A - Inclined rotary drum washing machine

Info

Publication number: CN1888196A
Application number: CN 200510014098
Authority: CN
Inventors: 金琮石; 李东范
Original assignee: LG Electronics Tianjin Appliances Co Ltd
Current assignee: LG Electronics Tianjin Appliances Co Ltd
Priority date: 2005-06-29
Filing date: 2005-06-29
Publication date: 2007-01-03

Abstract

The present invention provides an inclined drum washing machine with agitator. Said inclined drum washing machine includes the following several portions: obliquely-placed external tub; drum mounted in the interior of said external tub; hollow drum shaft for transferring motor drive force to said drum; bearing for supporting said hollow drum shaft and bearing seat; agitator and agitator shaft; drive gear and constraining device. Besides, said invention also provides the concrete working principle of said washing machine and its concrete operation method.

Description

A kind of inclined drum washing machine

Technical field

The present invention relates to a kind of roller washing machine, particularly relate to a kind of apsacline and roll washing machine.

Background technology

In general, washing machine is that the dirt on the washings or the household appliances of foul are removed in the mechanical shock effect of chemical breakdown effect by washing agent and current etc.

Wherein, roller washing machine is littler than upright cylindrical shape pulsator washing machine whole height, and follows and compare with a kind of pulsator washing machine of model that washing capacity is big, water consumption is few, and problems such as clothing twines mutually can not take place, so demand increases year by year.

Describe the structure of roller washing machine in detail below in conjunction with accompanying drawing.

Fig. 1 is the profile that shows common roller washing machine internal structure.Roller washing machine roughly comprises: in casing 1, by damper and spring-supported outer bucket 2; A drive division that is installed in outer bucket 2 interior rotatable cylindrical drums 3 and is connected with cylinder 3 by axle.

Driving part is made of rotor 4 and stator 5, and under the situation of not utilizing drive or conveyer belt, for the driving force of rotor directly is sent on the cylinder 3, directly is connected on the rotor 4 with cylinder 3 rotor rotated axles 14 in the back of outer bucket 2.

The front of casing 1, be provided with door 10, between door 10 and cylinder 3, packing ring 20 be installed, to keep air-tight states in the cylinder 3 with the assigned address of the opening direction correspondence of cylinder 3.

The roller washing machine of Gou Chenging like this, under the situation of connecting power supply, rotor 4 utilizes with the interaction of the electro permanent magnetic between the stator 6 rotation, the revolving force of rotor 4 is delivered on the cylinder 3 by armature spindle 14, make cylinder 3 rotations, utilize lifter 3a to promote washings, utilization fallen percussion under the effect of gravity is washed.

But, the common roller washing machine in the past of Gou Chenging like this, door 10 is positioned near the front central portion of casing 1, cylinder 3 horizontal positioned, so the user need squat down or bend over just can take, put washings, it is very inconvenient to operate.

In addition, only utilize the rotation of cylinder to wash, so clean result is not good.That is, common roller washing machine only adopts lifter to promote washings, utilizes fallen impulsive force to wash, so can not reach best clean result.

Summary of the invention

In order to address the above problem, the objective of the invention is to: provide a kind of and can allow the user pick and place washings easily, reduce the slurry amount and improve scourability and the inclined drum washing machine of effect.

In order to achieve the above object, roller washing machine of the present invention comprises: be used to store washings, and be provided with the wall portion that is connected and fixed drive division and anterior with respect to the outer bucket of ground by the acclivitous plastic material of certain angle; Be installed in inboard, the rotatable cylinder of outer bucket; Connect outer bucket back and pass through the hollow type drum shaft that axle links to each other with cylinder, transmits motor-driven power to cylinder; The bearing of at least more than one of support hollow shape drum shaft; The sleeve shaped bearing block of spring bearing; The stator that is connected and fixed of Tong rear wall parts outside; Be combined in the drum shaft rearward end, and constitute the rotor of brshless DC motor (BLDC motor) with stator; Leading section combines with impeller, and rearward end combines with drive, is formed with serration that meshes with impeller and drive and the impeller axle that connects the drum shaft hollow bulb at both ends; Be positioned at the rotor rear, the impeller rotation control drive that combines with impeller shaft rear end portion, and restraint device by the impeller of swing roller inside is controlled in the constraint and the release of drive.

Roller washing machine of the present invention, because the inclined external drum setting, so can take, put washings easily, the water consumption in the time of can reducing washing simultaneously.In addition,, make washings nowed forming and water (flow) direction variation in the cylinder, can improve clean result owing to be provided with impeller in cylinder inside.

Description of drawings

Fig. 1 is the profile that shows common roller washing machine internal structure;

Fig. 2 is the longitudinal profile schematic diagram that shows roller washing machine structure of the present invention;

Fig. 3 a is the significant points profile that shows the impeller stationary state;

Fig. 3 b is the significant points profile that shows the impeller rotation status;

Figure 4 shows that the stereogram of impeller of the present invention;

Fig. 5 institute sand is the structural representation of drive of the present invention;

Fig. 6 is the rear isometric view of Fig. 5;

Fig. 7 is the stereogram of the rotor axle sleeve of Fig. 3 a and Fig. 3 b.

Wherein:

1: casing 2: outer bucket

2a: suspension spring 2b: damper

3: cylinder 300: the drum rear wall face

3a: lifter 4: rotor

4a: rotor field spider 5: stator

6: drum shaft 600: the ring flange of drum shaft

7: impeller 7a: the washing leaf

8: impeller axle 800a: front side oilless bearing

800b: rear side oilless bearing 9: autobalance

10: door 11: restraint device

11a: solenoid 11b: plunger

11c: compressing spring 113: bearing block

113a: the place ahead bearing 113b: rear bearing

12: water seal 13: rotor axle sleeve

13a: the engaging piece 13b of rotor axle sleeve: the portion that is connected and fixed of rotor axle sleeve

13c: ribs 130b: positioning convex

131b: be connected and fixed with through hole 14: armature spindle

15: drive 15a: the rear wall parts of drive

15b: the side wall portion 15c of drive: the engaging piece of drive

150a: holddown groove 16: tripod 17: securing member

The specific embodiment

Be elaborated below in conjunction with 2～7 pairs of the specific embodiment of the present invention of accompanying drawing.

To shown in Figure 7, roller washing machine of the present invention comprises as Fig. 2: be used to store washings, and be provided with the wall portion that is connected and fixed drive division, and anterior relatively towards the outer bucket 2 of the plastic material of upside inclination specified angle; Be installed in outer bucket 2 inboard rotatable cylinders 3; After connecting outer bucket 2, logically link to each other with cylinder 3, to the hollow type drum shaft 6 of cylinder 3 transmission motor-driven power (Fig. 3 a, 3b); The bearing 113a of at least more than one of support hollow shape drum shaft 6,113b; Spring bearing 113a, the sleeve shaped bearing block 113 of 113b; The stator 5 that is connected and fixed of bucket 2 rear wall parts outside; Be combined in the rearward end of drum shaft 6, and constitute the rotor 4 of BLDC motor with stator 5 together; Be installed in cylinder 3 inboards, rotatable impeller 7; Leading section combines the impeller 8 of the hollow bulb that connects drum shaft 6 with impeller 7; Be positioned at rotor 4 rears, control with drive 15 in the impeller rotation that the rearward end with impeller axle 8 combines, and the restraint device 11 by the impeller 7 of swing roller 3 inside is controlled in the constraint and the release of drive 15.

The central part at bucket 2 rears outside, bearing block 113 embeds moulding and also forms whole with outer bucket 2.Front/rear bearing 113a, 113b are pressed into and are installed on the bearing block 113, are used for the drum shaft 6 at back-up roller 3 rears.

Stator 6 utilizes on the rear wall of the fixedly connected bucket 2 outside of securing member such as screw.Impeller axle 8 is by the oilless bearing 800a that is located at both sides, axle front and back respectively, and 800b supports.For stable support hollow shape drum shaft 6, the place ahead and the rear that are preferably in drum shaft 6 respectively are equipped with a bearing 113a, 113b.The bearing 113a at drum shaft 6 the place aheads and rear, the distance between the 113b is far away more good more, and this is stable favourable to axle.For the vibration that reduces cylinder 3 when dewatering also improves intensity simultaneously, the bearing 113a in drum shaft 6 the place aheads is bigger than the diameter of the bearing 113b at rear.The front of bearing 113a is equipped with and prevents from the water seal 12 of leaking to be provided with the spring that presses water seal 12 to the outer peripheral face of drum shaft 6 in the inside of water seal 12 forwardly.The Outboard Sections of water seal 12 is supported by bearing block 113, perhaps as Fig. 3 a, is supported by the rear wall of outer bucket shown in the 3b.

Restraint device 11 comprises solenoid 11a that is fixed on the outer bucket 2 and the plunger 11b that moves forward and backward in solenoid 11a inside.Along with the closed of the circuit of solenoid 11a or disconnect, plunger 11b constraint or discharge drive 15 makes impeller 7 fixing or rotations.At this moment, in solenoid 11a inside elastomeric elements such as compressing spring 11c are set preferably, this be because: when fixedly the plunger 11b of impeller 7 advances, because the position of the holddown groove 150a of drive 15 does not have the aligned in position with plunger 11b, when drive 15 was positioned at the position that breaks away from holddown groove 150a, plunger 11b contacted with the surface of holddown groove 150a under the effect of elastic force.Then, under the effect of washings, be connected in drive 15 rotations of impeller 7, make plunger 11b enter holddown groove 150a automatically along with the rotation of cylinder 3.

The embodiment that is fixed on outer bucket 2 with solenoid 11a is different, and the solenoid 11a that constitutes restraint device also can fixedly mount bucket 2 other place in addition outside.Solenoid 11a is fixed on the casing 1 of outer bucket 2, at inner compressing spring 11c and the plunger 11b of installing of solenoid 11a, according to the closed of the circuit of solenoid 11a or disconnect,, control the fixing or rotation of impeller 7 thus by the advancing or retreat and retrain or discharge drive 15 of plunger 11b.

In addition, sandwich the rotor axle sleeve 13 of resin material between drum shaft 6 and the rotor 4.When rotor axle sleeve 13 is positioned at the rear of rotor field spider 4a, be combined on drum shaft 6 and the rotor field spider 4a; Also can when being positioned at the place ahead of rotor field spider 4a, rotor axle sleeve 13 combine with drum shaft 6 and rotor field spider 4a.

As shown in Figure 7, rotor axle sleeve 13 comprises: be positioned at the central authorities of rotor axle sleeve 13, the engaging piece 13a that insertion drum shaft 6 meshes; Be used to be connected and fixed rotor field spider 4a and protrude a plurality of positioning convex 130b towards rotor field spider 4a that form on extend radially forms around the engaging piece 13a 13b of the portion that is connected and fixed and the 13b of the portion that is connected and fixed at rotor axle sleeve 13, positioning convex 130b and fixed part 13b are integrally formed.Also can replace positioning convex 130b, be connected with rotor field spider 4a by bolt with being connected and fixed with through hole 131b.

In addition, at the engaging piece 13a of rotor axle sleeve 13 be connected and fixed among the 13b of portion, at least will a certain side therein ribs 13c be set and strengthens intensity.

Central inner peripheral surface at the engaging piece 13a of drum shaft 6 rearward end outer peripheral faces and corresponding therewith rotor axle sleeve 13 is formed with intermeshing serration.

In addition, rear surface arranged outside at cylinder 3 has back-up roller rear surface 300 also can strengthen the tripod 16 of intensity, leading section at drum shaft 6 is formed with the ring flange 600 of being close to tripod 16, and the ring flange 600 of drum rear wall face 300, tripod 16 and drum shaft 6 is linked together by the securing member 17 that connects them.

Be formed with the serration that meshes with impeller 7 and drive 15 respectively at the both ends of impeller axle 8, in order to improve intensity, serration should have the involute profile face.

Drive 15 comprises: around the rear wall parts 15a of rotor field spider 4a rear surface; Side wall portion 15b around irony rotor field spider 4a side wall surface; Be provided with the engaging piece 15c of impeller axle 8 and in order to retrain in central authorities, the holddown groove 150a that forms at position around the rotor field spider 4a of drive 15 by 11 pairs of drives 15 of restraint device around the rear surface of rotor field spider 4a.The engaging piece 15c of drive 15 protrudes and forms and insert the rearward end inboard that is installed in drum shaft 6.

The material of drum shaft 6 is a SM45 series, perhaps adopts stainless steel.When the material of drum shaft 6 is SM45 series,, should carries out chromium plating to the surface of drum shaft 6 and handle for the friction that reduces drum shaft 6 or wearing and tearing, raising corrosion resistance.In order to reduce cost, also can only to carry out chromium plating and handle a part of surface of drum shaft 6.In the case, the sliding surface that contacts water seal 12 in the surface of drum shaft 6 at least must carry out the chromium plating processing.

In addition, for the friction that reduces water seal 12 and drum shaft 6 sliding surfaces or wearing and tearing, raising corrosion resistance, the most handy stainless steel is made drum shaft 6.

Also be provided with washing leaf 7a on the surface of impeller 7.Washing leaf 7a can increase washings with the frictional force between the washing leaf 7a when washings falls, washings is moved to fore-and-aft direction in cylinder 3.

Here, the interarea of impeller 7 and the washing leaf 7a that is provided with at interval on interarea are preferably integrally formed.Washing leaf 7a to impeller 7 radially or circumferencial direction form one at least with ramp.The interarea of impeller 7 has certain curvature, and the external diameter of impeller is equivalent to 50～80% of cylinder 3 internal diameters.The washing leaf 7a maximum height of impeller 7 is equivalent to 5～15% of impeller external diameter.

The central axis of cylinder 3 and outer bucket 2 is face tilt 10～30 degree relatively.If the angle of inclination surpasses 30 degree, cylinder 3 rotates under the state of wide-angle tilt, and washings can be concentrated to cylinder 3 rear sides during washing, twine mutually,, can produce vibration when dewatering simultaneously so clean result can descend, so the gradient of outer bucket 2 is preferably in below 30 degree.

In addition, a plurality of lifter 3a are set on the inner peripheral surface of cylinder 3, are used for when washing, upwards promoting washings, but should form about distance of about 30 to 90mm between lifter 3a and the impeller 7.Otherwise washings can be clipped between lifter 3a and the impeller 7, and the rotation of impeller 7 and cylinder 3 is restricted.

Forward/rear at cylinder 3 is equipped with autobalance 9, and fluids such as water or salt solution preferably are equipped with in autobalance 9 inside.Autobalance 9 can be the single fluid cell structure, but preferably constitutes concentrically ringed 2 heavy, 3 heavy or 4 heavy fluid cell structures, and inboard fluid chamber and outside fluid chamber separate, and fluid can not flow between each fluid chamber.The height of autobalance 9 (H) more helps reducing the vibration of cylinder 3 during greater than width (W).

In addition, can also the upper inner of casing 1 and outside suspension spring 2a is set between the outer peripheral face top of bucket 2, be used for lifting outer bucket 2; Between the bottom of the outer peripheral face bottom of bucket 2 and casing 1 damper is set outside, the vibration that is produced when being used for reducing dehydration.

Roller washing machine of the present invention is because the place ahead of cylinder 3 and outer bucket 2 is to ground inclination 10～30 degree, so can take, put washings easily; Be provided with impeller 7 in cylinder 3 inside, so can improve clean result.That is: existing tumbling-box washing machine, just adopt lifter 3a to promote washings, utilize fallen impulsive force to wash, and roller washing machine of the present invention is owing to be provided with outer bucket 2 and cylinder 3 obliquely, impeller 7 is set in cylinder 3 simultaneously, so when washing, further strengthened the effect of lifter 3a and the percussion between impeller 7 and the washings, make moving forward and backward of washings more active, so clean result significantly improved.

In more detail, outer bucket 2 and cylinder 3 are obliquely installed, and are connected on the drive 15 of motor rear side after impeller axle 8 connects hollow shape drum shaft 6.At this moment, be positioned at the power supply of the restraint device 11 on outer bucket 2 rear walls by control, can make plunger 11b under the effect of the solenoid 11a of restraint device 11 and compressing spring 11c, enter in the holddown groove 150a of rondelle drive 15 or from holddown groove 150a, spin off, that is: constraint or release drive 15 make impeller 7 fixing or rotations.Therefore, when washing, impeller 7 fixing or rotations make the washings flow regime variation in the cylinder 3, improve scourability.

In addition, when dehydration, control plunger 11b makes in its holddown groove 150a that enters drive 15, makes impeller 7 fixing; Perhaps control plunger 11b, it is spun off from the holddown groove 150a of drive 15, make impeller 7 rotations.

If solenoid 11a closure during dehydration, plunger 11b spins off from the holddown groove 150a of drive 15, also superhigh speed rotation of impeller 7 when cylinder 3 rotates at a high speed, but the rotation of the high speed of the impeller 7 that at this moment carries out not is directly to utilize driving force to force rotation as cylinder.That is: impeller 7 not and the motor synchronous rotation, this is because the washings in the cylinder 3 are deposited in above the impeller 7, the revolving force of cylinder is sent to impeller 7 by washings when cylinder 3 rotations, therefore, impeller 7 just rotates at a high speed with the speed identical with cylinder 3.

In addition, when improving scourability, roller washing machine of the present invention is utilizing fluid to keep the autobalance 9 of cylinder equilibrium and the balance weight that is installed on the outer bucket 2 separately is arranged on the inboard, front and back of cylinder 3, so can more effectively reduce the system vibration that the eccentric weight by cylinder 3 inside causes when dehydration.

Particularly, roller washing machine of the present invention because outer bucket 2 and cylinder 3 tilt, is compared with common roller washing machine, and the vibration of its rear side increases, so at cylinder 3 rear installed inside autobalances 9, can effectively reduce the vibration of rear side.

As mentioned above, because outer bucket 2 and cylinder 3 be obliquely installed, so in cylinder 3, also can wash as usual with a spot of washings.

For example, roller washing machine of the present invention because cylinder 3 is the states that are obliquely installed, washings is concentrated to the rear of the cylinder 3 that tilts, thus only need inject can the washing by soaking thing the washing water yield wash.And, roller washing machine of the present invention, when assembling drive 15, the engaging piece 15c of drive 15 is positioned at drum shaft 6 inside, so the entire length that shortens roller washing machine can be arranged.

The following describes roller washing machine of the present invention when washing, the control procedure of drive 15 and effect thereof.

3a illustrates the process that swing roller 3 washs under impeller 7 stationary states at first, in conjunction with the accompanying drawings.

Shown in Fig. 3 a, if plunger 11b advances and is positioned in the holddown groove 150a of drive 15, drive 15 can not rotate, so impeller 7 can not rotate.In this state, if turn-on power washs, rotor 4 begins rotation, and simultaneously, the cylinder 3 that links to each other with rotor 4 by axle rotates.At this moment, cylinder 3 is rotated according to the control signal of micro computer, and impeller 7 is kept halted state.

Thus, washings is promoted the back by a plurality of lifter 3a of cylinder 3 inside and falls under the effect of gravity, wash, and because cylinder 3 is to tilt, the part of washings when falling with impeller 7 and washing leaf 7a collision, forwards mobile.

Particularly, roller washing machine of the present invention promotes the central protuberance of the fallen washings in back because of collision washing leaf 7a and impeller 7 by lifter 3a, compares with existing roller washing machine, has increased moving forward and backward of washings.That is the interarea curvature of the inclined-plane of washing leaf 7a and impeller 7 and inclination angle etc. is set the position of washings is changed.

In addition, cylinder 3 rotates under the state of inclination, and impeller 7 is fixing, so utilize the washings type of flow and the washings of the speed difference formation variform between the cylinder 3 that rotates and the impeller 7 of fixing to flow to.

At this moment, the washing current play the booster action that washings is evenly cleaned to the washings that concentrates on cylinder 3 rear sides each position dispersion in cylinder again.That is, when washing, utilize current that cause by bump between washings and the impeller 7 and washing force and the rinsability that improves washings by the percussion that bump between washings and the impeller 7 causes greatly.

Different below in conjunction with stating in front of the accompanying drawing 3b explanation, remove the constraint to drive 15, the washing process under impeller 7 free rotation states.

Shown in Fig. 3 b, if solenoid 11a turn-on power, plunger 11b is inhaled into, and makes compressing spring 11c compression, and plunger 11b retreats simultaneously, spins off from the holddown groove 150a of drive 15, and drive 15 can rotate thus, and impeller 7 also becomes rotatable state.

In this state, turn-on power washs, rotor 4 rotations, cylinder 3 rotations simultaneously.

At this moment, as previously mentioned, cylinder 3 is rotated according to the control signal of micro computer, impeller 7 under the effect of cylinder 3, washings and washings to the left or right side rotation.

Therefore, washings is promoted the back by a plurality of lifter 3a of cylinder 3 inside and falls under the effect of gravity, washs.At this moment because cylinder 3 is the states that tilt, so the part of washings when falling with impeller 7 collisions of rotation, the washings that impinges upon impeller 7 is forwards mobile.That is: the interarea curvature of the inclined-plane of washing leaf 7a, the impeller 7 and change in location that factor such as inclination angle causes washings is set, therefore, moving forward and backward of washings is more and more.

Meanwhile, impeller 7 also becomes rotatable state, but is not to be forced to rotation as the speed that cylinder 3 usefulness are stipulated, so have speed difference between the cylinder 3 of rotation and the impeller 7.The washings moving direction and the washings that therefore can form irregular and various form flow to.Though that is: smaller under rotating ratio impeller 7 stationary states of cylinder 3, at this moment also have between cylinder 3 and the impeller 7 and help the relative speed difference that washings flows, and this is helpful to improving washing force and rinsability aspect.

Roller washing machine of the present invention can utilize big relatively speed difference to wash under the state of fixing impeller 7, also can utilize relatively little speed difference to wash under the state that impeller 7 rotates freely.

And, fixing or discharge when washing under the state of impeller 7, also can be controlled at the forward of cylinder 3/counter-rotating time in the short time that washings can not fall and wash.

The present invention can not be limited in the middle of the embodiment, in the scope that does not break away from the technology of the present invention thought various embodiments can be arranged, for example: rotatable small-sized impeller can also be set on the inner peripheral surface of cylinder 3.

Claims

1. an inclined drum washing machine is characterized in that, comprising: be used to store washings, and be provided with the wall portion that is connected and fixed drive division and anterior with respect to the outer bucket of ground by the acclivitous plastic material of certain angle; Be installed in inboard, the rotatable cylinder of outer bucket; Connect outer bucket back and pass through the hollow type drum shaft that axle links to each other with cylinder, transmits motor-driven power to cylinder; The bearing of at least more than one of support hollow shape drum shaft; The sleeve shaped bearing block of spring bearing; The stator that is connected and fixed of Tong rear wall parts outside; Be combined in the drum shaft rearward end, and constitute the rotor of brshless DC motor with stator; Be installed in the inboard rotatable impeller of cylinder; Leading section combines with impeller, and rearward end combines with drive, is formed with serration that meshes with impeller and drive and the impeller axle that connects the drum shaft hollow bulb at both ends; Be positioned at the rotor rear, the impeller rotation control drive that combines with impeller shaft rear end portion, and restraint device by the impeller of swing roller inside is controlled in the constraint and the release of drive.

2. roller washing machine according to claim 1 is characterized in that, described impeller axle is supported by the oilless bearing that is installed in its place ahead and rear respectively.

3. roller washing machine according to claim 1 is characterized in that, described restraint device comprises: be fixed on the solenoid on the outer bucket; The plunger that moves forward and backward in solenoid inside and place in the solenoid, provide the compressing spring of thrust to plunger, according to the closed of solenoid circuit or disconnect, plunger can retrain or discharge drive, the fixing or rotation of control impeller.

4. roller washing machine according to claim 1 is characterized in that, sandwiches between drum shaft and rotor and is provided with rotor axle sleeve.

5. roller washing machine according to claim 4, it is characterized in that, rotor axle sleeve is the resin material, comprising: be positioned at rotor axle sleeve central authorities, insert drum shaft and with the engaging piece of drum shaft engagement and be used to be connected and fixed rotor field spider and extend radially forms around engaging piece the portion that is connected and fixed.

6. roller washing machine according to claim 1, it is characterized in that, the rear surface of cylinder is provided with the tripod of strengthening drum rear wall face intensity and back-up roller rear surface, leading section at drum shaft forms the ring flange of being close to tripod, and drum rear wall face, tripod and drum shaft ring flange are fixed together by the securing member that connects them.

7. roller washing machine according to claim 1 is characterized in that, is formed with serration at the two ends of impeller axle, and serration has the involute profile face.

8. roller washing machine according to claim 1 is characterized in that drive comprises: around the rear wall parts of rotor field spider rear surface; Side wall portion around the rotor field spider side wall surface; Be provided with the engaging piece of impeller axle and for drive being retrained in central authorities, the holddown groove that forms at position around the rotor field spider of drive by restraint device around the rear surface of rotor field spider.

9. roller washing machine according to claim 8 is characterized in that, the engaging piece of drive protrudes and forms, and inserts the rearward end inboard that is installed in drum shaft.