CN2349231Y

CN2349231Y - Washing mahcine inner cylinder conductive to rubbing and dehydrating stability

Info

Publication number: CN2349231Y
Application number: CN 97230158
Authority: CN
Inventors: 李世维
Original assignee: Individual
Current assignee: Individual
Priority date: 1997-12-12
Filing date: 1997-12-12
Publication date: 1999-11-17
Anticipated expiration: 2007-12-12

Abstract

The utility model relates to an inner cylinder of a washing machine, which is helpful for scrubbing and kneading and dehydration stability. The inner cylinder of a washing machine is designed for solving problems that the scrubbing capability of the existing impeller type and agitator type washing machines to clothing collars and cuffs is poor and stability is poor during dehydration, and the washing and rinsing time of a tumbling-box type washing machine is long and the stability is also poor during dehydration. The inner cylinder of a washing machine is characterized in that a certain number of rolling wheels which can be rotated freely are arranged on convex ribs of the inner cylinder and other side wall areas according to a certain rule. The purposes of scrub and kneading are achieved by utilizing nonautomatic rotation when the rolling wheels are contacted with clothing. When clothing is dehydrated, clothing can be uniformly arranged in sequence by utilizing the rolling of the rolling wheels to clothing so that the function that the inner cylinder of a washing machine is helpful for dehydration stability is achieved. The inner cylinder of a washing machine can be used for machine models of the impeller type, the agitator type, the tumbling-box type, etc.

Description

A kind of inner tank of washing machine that helps to crumple with dewatering stability

The utility model relates to the washing machine field.

In the prior art, China's utility model (CN2159403Y) discloses a kind of ball rubbing type washing machine, evenly inlay a lot of protruding plastic strips parallel or wooden on this inner tank of washing machine sidewall with axis, (size is certain) of throwing in a kind of some during washing again in inner core helps the ball syringe of rubbing effect, when rotating for weakening inner core, the strike note that sends between ball syringe and inner core inwall, the ball syringe appearance is coating the garment bag that has the effect of waterproof corrosion resistant concurrently.In inner core when rotation, drive the clothing lift-over by the plastic strip of projection and beat, and ball syringe and clothing friction constantly takes place are able to clothing washed and float totally simultaneously.Here we are not difficult to find out, this technology, certainly will will be selected out these little ball syringes after promptly laundry finishes one by one for user's not convenient property among the parcel of clothing.China's utility model also disclose apply for artificial same people by name " Water Extraction Machinery automatic equalization part " (CN2076568U) and " the automatic compensating part of centrifuge dewatering) " by name two technology (CN2084942U), because of the operation principle basically identical of these two technology, be example with " Water Extraction Machinery automatic equalization part " at this.The core of this technology be with one or more inner sealings some water soft (as rubber) the ring pipe suit or be fixed on the inner core madial wall, this ring pipe can have many groups.Its operation principle is: many its centrifugal force of zone of clothing accumulation is greater than and piles up few zone during dehydration, thereby clothing formed the pressure that varies in size to being trapped among the flexible pipe of inner core madial wall on circle, and the water in the pipe of the big zone of pressure is with regard to the oppressed little zone of pressure that flows to.Play the effect of balanced inner core spin stabilization thus.Its principle is feasible, but for the very uneven situation of putting on the inner core sidewall, its effect probably is limited, and its starting point of condition order does not also lie in and clothing will be put evenly, but will adapt to this inhomogeneous.

The utility model is not careful and not comprehensive for addressing the above problem with the ubiquitous rubbing of all models class automatic washing machine at present exactly, and all being difficult for stably during dehydration, problem designs.

The purpose of this utility model is achieved in that and is equipped with or is equipped with separately roller (2) respectively on the convex tendon of inner core sidewall or on sidewall, specific practice is: I. at the curved surface top of curved surface convex tendon (5), press the trend of convex tendon (5), left opening after a spacing that equates is to cut out one section curved surface, the length that the length of its opening is removed the cylinder behind the slick and sly conical surface in two ends than roller (2) is slightly long, its width, fix and place shaft tray (7) with (7 ') with behind the roller (2) in open interior exactly, roller (2) can be connected along sliding with the original curved surface radian of convex tendon (5) at the column side face radian of this opening part exposed portions serve, and the width that roller (2) can freely be rotated therein, shaft tray (7) just is fixed on the both sides, inside of convex tendon (5) opening part with (7 '), roller (2) is installed in shaft tray (7) and goes up also free to rotate in (7 '); Shaft tray (7) and (7 ') be two tools certain thickness with the tablet of inner core (1) with material, their shape and size match with the flat shape and the size of crosscut curved surface convex tendon (5) gained, downward in the hump of shaft tray (7) with (7 '), length is slightly less than on the position of roller (2) radius and respectively has a circular hole, the part and convex tendon (5) affixed (as the welding) II that can coincide with curved surface convex tendon (5) of shaft tray (7) and (7 '). on the sidewall of inner core (1), on three equidistant lines of every adjacent two convex tendons (5), have the opening of the equal some of spacing, the geometry of opening is similar fully to lateral projection's shape of roller (2), but area is bigger, fixing axle sleeve (3) and (3 ') on the sidewall of opening two ends inner cores (1) respectively, roller (2) is installed in the opening part between (3) and (3 '), and roller (2) should be able to freely rotate.III. roller (2) is the cylinder of rib more than, and the cylinder two ends are slick and sly end face, and the both ends of the surface top is respectively two thin cylinder crown of rolls (6) and (6 '), and spherical small embossment point evenly gathers in the cylinder surface; Roller (2) can also be that longitudinally central axis is many ribs cylinder of hollow in addition, the rigid elongate axle (8) that one apparent height is slick and sly and bright and clean penetrates in the hollow hole of roller (2), the exposed portions serve of slender axles (8) at roller (2) two ends can embed in axle sleeve (3) and (3 ') just, and in the circular hole on shaft tray (7) and (7 '), thereby roller (2) can freely be rotated.The shape of roller its shape except that many ribs cylinder also can be spherical and two ends are the billiard table body of slick and sly end face.Enforcement by above scheme will make clothes washing cleaner thoroughly and shorten the laundry time, and make when dehydration and put vibrations that inequality brings because of clothing and weaken significantly or eliminate fully, and this will be introduced in the explanation afterwards.

Fig. 1 is the schematic top plan view of inner core (1) sidewall, on three curved surface convex tendons (5) roller (2) is being housed respectively as can be seen on the figure, and roller (2) is connected along sliding with original radian of convex tendon (5) at the radian of convex tendon (5) top institute opening part exposed portions serve.Move towards on three lines of parallel inner core sidewall roller (2) to be housed respectively also also can finding out on Fig. 1 at equidistant apart from every adjacent two convex tendons (5) and convex tendon (5).

Fig. 2 is the three-dimensional local figure of inner core (1), be decorated with on the figure one installed be shaped as evenly the gather roller (2) of spherical small embossment point of many ribs cylinder and surface, and pair roller (2) play supporting role be fixed on a pair of axle sleeve (3) and (3) on the inner core lateral wall; Also be decorated with a opening on the inner core sidewall opened that still is unkitted upper roller (2) in addition on Fig. 2, the geometry of opening is similar fully to lateral projection's shape of roller (2), just area is bigger, can rotate freely and smoothly to guarantee the roller (2) that is in therebetween; Also be decorated with the unified water dumping hole (4) of pore size on Fig. 2.

Fig. 3 is the three-dimensional local figure of inner core (1), neat edge line is the tube neat result who cuts away in the end with inner core (1) on the figure, jagged line is the irregular transversal of inner core (1) sidewall, be decorated with a curved surface convex tendon (5) above, go up with curved surface convex tendon (5) and to be cut out left opening behind two sections curved surfaces, this opening is set for roller (2) is installed, its length is slightly longer than the column side face length of roller (2), its width should be able to make the column side face radian of roller (2) exposed portions serve be connected along sliding with the original curved surface radian of convex tendon (5), and can make the smooth and easy rotation freely of roller (2).Also has water dumping hole (4) on this figure.

Fig. 4 is the shape schematic diagram of shaft tray (7) with (7 '), respectively has one and can embed the small sircle hole of crown of roll (6) with (6 ') on (7) and (7 ').

Fig. 5 is the utility model inner core (1) when being used to vertical shaft impeller-type or agitator type washing machine, washes roller when floating clothing (2) and helps the schematic diagram (overlooking down) crumpled, arrow V among the figure ₁Direction of rotation and the speed of representing clothing group (9) to rotate with current; V ₂The direction and the speed of the rotation of representing all rollers (2) to be rubbed and producing by clothing.

Fig. 6 is that the utility model inner core (1) is used to vertical shaft impeller-type agitator type washing machine when dehydration, and roller (2) is evacuated the work schematic diagram (overlooking down) of clothing group, arrow V among the figure ₁Represent the direction of rotation and the speed of inner core (1), V ₂, V ₃, V ₄Represent the direction and the speed of the slip opposite that different parts took place of clothing group respectively with respect to inner core madial wall direction of rotation; V ₅, V ₆, V ₇Represent the direction and the speed of the rotation of three groups of rollers (2) generation respectively.

Fig. 7 is after clothing group is put evenly fully, the slip of relative inner wall no longer takes place, thereby the rotation of all rollers (2) also all is the schematic diagram (overlooking down) that stops.

Fig. 8 and Fig. 9 are when the utility model is used for horizontal axis rotary drum formula washing machine, wash two width of cloth continuous operation schematic diagrames (front view) when floating, V among Fig. 8 ₁Represent inner core direction of rotation and speed, V ₂Represent clothing group to accompany and the moving direction of motion and speed, V among this Fig. 8 ₁=V ₂, rotation all takes place with clothing contacted all rollers of group (2).V among Fig. 9 ₁Represent inner core direction of rotation and speed, V ₂Be the direction of motion and the speed that clothing group accompanies and moves, V among this Fig. 9 ₂＜V ₁, the relative slip with respect to madial wall, V have taken place in this clothing ₃With V ₄Be respectively the rotation direction and the speed of the rotation that taken place of two groups of rollers (2).

Figure 10 and Figure 11 are the utility model when being used for horizontal axis rotary drum formula washing machine, two width of cloth work schematic diagrames (front view) during dehydration.Among Figure 10: V ₁Represent the direction of rotation and the speed of inner core, V ₂, V ₃Represent the opposite relative glide direction and the speed of the direction with respect to the inner core madial wall of the different parts generation of clothing group respectively; V ₄, V ₅, V ₆, V ₇Representative and clothing are rolled into a ball the rotation direction and the speed of the rotation that the roller (2) contact taken place respectively.Figure 11 represents after clothing group is put evenly fully, no longer takes place to slide relatively, but tightly is attached on the inner core madial wall, rotates with speed with the inner core spacer step, and this moment, rotation phenomenon all no longer took place all rollers (2).

Figure 12 and Figure 13 represent other two kinds of shapes of roller according to claim 5 (2), and their surface all evenly is thick with spherical small embossment point, but limits because of the difficulty that illustrates, and does not draw at this.

Figure 14 is another form of roller according to claim 4 (2), also should evenly gather spherical small embossment point and of the body side surface of roller (2) along the rib of axis direction equally distributed projection on body side surface, for illustrating conveniently, the rib and the spherical small embossment point of projection all draw on this figure.

The utility model is compared with prior art, has lot of advantages, referring now to each accompanying drawing comparison be described as follows: in the plain edition during laundry of the rotary drum washing machine of bucket, the clothing group that is immersed in the water does intermittent clockwise or anticlockwise rotation respectively with current, because of general smoother all on the inner core madial wall, thereby the clothing that passes each other by a shave with it does not produced the rubbing effect basically.But adopt the inner core after the utility model technology, because of the roller free to rotate (2) by certain regular equally distributed some has been installed on its madial wall, when doing intermittent both forward and reverse directions and rotate with current equally in clothing group like this, clothing group will produce the frictional force with certain normal pressure to all rollers (2), frictional force causes all rollers (2) that rotation takes place, the result of rotation is that distinctive protruding rib of roller (2) and spherical small embossment point produce even, careful and comprehensive rubbing, situation as schematically shown in Figure 5 to clothing.Thus we as can be seen the utility model wash when floating being used for vertical shaft impeller-type or stirring type fully-automatic washing machine, help the principle of rubbing effect and it to be better than the characteristic in essence of general other various forms inner core.For the vertical shaft impeller-type or the stirring type fully-automatic washing machine that adopt common inner core technology, operation principle during its dehydration is such, that is: because each position of each clothing group and clothing group is different with the contact area of inner core madial wall, normal pressure between contact-making surface different with each contact-making surface on different (that is coefficient of friction differences) of clothing quality, therefore when inner core rotates at a high speed suddenly, the frictional force that each clothing group produces between inner core madial wall contact-making surface is just very inequality, but also because entwining between each clothing group, assorted mistake and the complexity that involves, acceleration that they just can obtain to have nothing in common with each other and speed, identical with the acceleration (angular acceleration) of inner core madial wall rotation, can paste immediately with the madial wall synchronous high-speed and turn round, compare with the madial wall acceleration and to want each little clothing group, must after after a while, just can reach the running speed synchronous with madial wall, and relative slip displacement in other words with respect to madial wall must take place at this moment these clothing groups obviously, have nothing in common with each other again according to each clothing group distance that take place or that do not slide or slide but slide, each the clothing group in the inner core is able to evacuate on madial wall and comes.But it often is not good that this sliding is evacuated effect.This be because in each the clothing group that takes place suddenly with inner core madial wall or constant speed, or low speed or more in the rapid rotation of low speed slightly, each clothing group can obtain never to arrive great centrifugal force in short moment, and centrifugal force makes each clothing group form the normal pressure that synchronous direct ratio increases rapidly to madial wall.As everybody knows on physical mechanics, two objects that are in contact with one another, the frictional force of the relative motion that produces between its contact-making surface at coefficient of friction one regularly, frictional force is proportional to normal pressure.This main cause just, so the displacement that each clothing group slides on the inner core madial wall is promptly to end extremely limited and short moment, thereby each clothing group often the evacuation of order uniformly come.Therefore the vertical shaft full-automatic pulsator washing machine of a lot of brands of selling in the market posts a label mostly, above with roughly content: ' machine can stop dehydration suddenly sometimes, and water filling in bucket again, this is for making clothing put the normal procedure of evenly establishing, it is not fault, still uneven behind above-mentioned action triplicate, the machine caution that will pipe woulds you please in person clothing be balanced ' ... the utility model technology can overcome the weak point of not enough and cited " the Water Extraction Machinery automatic equalization part " of the above plain edition inner core just.The principle of the utility model technology is: utilize roller free to rotate (2) can help each clothing group that the displacement of big distance sequentially takes place successively, well-known force of rolling friction will be far smaller than force of sliding friction, so although the normal pressure that each clothing is rolled into a ball the inner core madial wall increases (that is frictional force increases rapidly between contact-making surface) rapidly in short moment, but the displacement that roller (2) still can help clothing group to move big distance, up to the frictional force between contact-making surface greatly to a certain degree the time the mobile of each clothing group just can stop; To also have an effect be exactly to roll into a ball abrasive tumbling on it and out-of-date when the clothing that contact with it to roller (2) in addition, quick rotation can take place in roller (2), this rotation helps this clothing to be broken up or next group is moved the clothing of coming break up, and it also helps to squeeze the excessive moisture of clothing group simultaneously.Schematic diagram that Fig. 6 is drawn and the schematic diagram of Fig. 7 just are the embodiments to the visualization of above-mentioned analysis.We have drawn advantage that helps dewatering stability when the utility model is used for impeller-type or stirring type fully-automatic washing machine and the advantage in essence that is different from other common inner core thus.Horizontal axis rotary drum washing machine for common inner core, washing of it floated principle and is: when the intermittent both forward and reverse directions rotation of inner core low speed, because the effect of frictional force between clothing group and inner core madial wall (the comprising convex tendon) contact-making surface, the clothing at each position of contact-making surface will be done constant speed or slightly low speed or more low speed with the inner core madial wall ... the motion that accompanies, clothing is rolled into a ball in the no relative motion between contact-making surface of inner core madial wall and is taken place during constant speed, clothing group slightly low speed or more low speed or ... the time then produced relative motion between contact-making surface, promptly the phenomenon of skidding has taken place in clothing group on the inner core interior side-wall surface.In addition away from each position of the clothing of contact-making surface group, because of not being subjected to or directly being subjected to the effect of frictional force between contact-making surface, its original effect of inertia will make these positions keep static as far as possible, therefore whole group's clothing these two kinds not under the effect of (promptly two kinds of power are in opposite directions passed the actual effect center of gravity place that this clothing is rolled into a ball) power on the same straight line, lift-over will take place.But also because clothing is rolled into a ball when being elevated to certain altitude with the lift-over of inner core madial wall, with the increasing gradually of gravity effect, this clothing group also can drop and descend.The lift-over continuously of clothing group and beating, common exactly interior cartridge type tumbling-box washing machine is washed the operation principle of floating clothing.Adopt the horizontal axis rotary drum formula washing machine of the utility model technology, the maximum characteristics of its inner core have been installed the roller free to rotate (2) of some exactly respectively by certain rule on three curved surface convex tendons (5), also adorning some rollers (2) free to rotate respectively on three lines of the equidistant inner core sidewall of every adjacent two convex tendons (5).During laundry, when clothing group makes this clothing group each position of contact-making surface accompany with the speed with the sidewall constant speed with frictional force between inner core madial wall contact-making surface and when moving, is embedded in following all rollers (2) by clothing group pressure obviously and rotation can not take place.The effect of convex tendon this moment (5) is tantamount to the convex tendon on the plain edition inner core, and another string is pressed the roller (2) that buries also can temporarily regard a special convex tendon as by clothing group, anticipates V among Fig. 8 as shown in Figure 8 ₁Represent the direction of rotation and the speed of inner core, V ₂The direction of motion and the speed representing clothing group to accompany the inner core madial wall and move.This moment V ₁=V ₂, rotation does not all take place in relevant all rollers (2).But when clothing group moves to accompany than the lower slightly or lower speed of inner core madial wall movement velocity, slip with respect to madial wall has taken place in this clothing group obviously, the result who slides makes the roller (2) that is buried by pressure that rotation take place, and the result of rotation to be the region of interest of clothing group that contact is crossed produced careful and comprehensively rubbing effect, meaning is such as shown in Figure 9, V among Fig. 9 ₁Represent the direction of rotation and the speed of inner core, V ₂For clothing is rolled into a ball with madial wall travel direction and speed, V ₂＜V ₁, so skidding, V have taken place in this clothing on madial wall ₃And V ₄The direction and the speed that cause the rotation that two groups of rollers (2) take place respectively for clothing group after skidding.In a word because clothing is rolled into a ball ever-changing that shape takes place at any time, the actual conditions of contact-making surface (as parameters such as normal pressure, coefficient of frictions) also are fast changing, thus curved surface convex tendon (5) go up the roller (2) of tandem and not the roller (2) of the tandem on the convex tendon (5) when contact with clothing group with regard among all being in the commentaries on classics that the instant becomes at any time with quarter and not changeing.When not changeing, the tandem of all rollers (2) can be regarded as the effect of common convex tendon, because of this special " convex tendon " has six on this inner core madial wall, so obviously they have increased the rubbing dynamics that clothing is rolled into a ball greatly; And when roller (2) tandem is rotated (rotation), the rib of roller (2) side projection and uniform spherical small embossment point have produced comprehensively and careful rubbing clothing group equally, from we also are not difficult to find out when the utility model technology is used to horizontal axis rotary drum formula washing machine here, it help the unusual property of crumpling.When the utility model technology is used for horizontal axis rotary drum formula laundry machine dehydration, principle when it helps the principle of inner core rotational stabilization and is used for the vertical shaft impeller-type is basic identical, also be to utilize the rolling action of roller (2) to clothing, make clothing group sequentially produce the relative slip opposite with inner core madial wall direction of rotation, make interior all clothings groups of tube obtain times prolongation as far as possible final and that the inner core rotary speed is synchronous, increase rapidly to eliminate clothing group centrifugal force moment whereby, cause synchronous direct ratio of moment to increase rapidly to inner core madial wall normal pressure, thereby make clothing group along the inner core madial wall too short drawback of sliding distance in turn, it reaches clothing group is evacuated the purpose that evenly realizes helping dewatering stability as far as possible by helping clothing group to prolong sliding distance in proper order.Content shown in Figure 10 is: arrow V ₁Be inner core (1) the dehydration direction of rotation and the speed in a certain moment when initial, V ₂And V ₃Direction and the speed of representing respectively that two different parts of clothing group take place with respect to inner core madial wall and the slip opposite with the madial wall direction of motion, V ₄, V ₅, V ₆, V ₇Represent direction and the speed of the roller (2) of different parts respectively in the moving rotation that takes place down of the wiping of clothing group, Figure 11 represents after after a while, all clothing groups in the inner core are at the state of being evacuated under the help of all rollers (2) after putting evenly, any relative sliding phenomenon no longer takes place because of clothing group in this moment, so all rollers (2) all are in the state of no longer rotation.

The utility model is compared with prior art has compact conformation, clean all high, do not hinder clothing, water-saving, more stable advantage of power saving and when dehydration saves time, particularly concerning horizontal axis rotary drum formula washing machine, can greatly shorten and wash time of floating and the stationarity that greatly improves dehydration, because of the very big raising of dehydration stationarity thereby can improve the rotating speed of dehydration electric motor greatly, in the hope of reaching the threshing performance with the dehydration of vertical shaft pulsator washing machine equal extent, the weight of heavy cement counterweight (or other counterweight) can be considered to cut down significantly in the horizontal axis rotary drum type washing machine in addition, thereby make no matter the washing machine of this kind type is to use in household, still when industry manufacturing and transportation, all reach a brand-new spry and light and leap newly easily.The very big raising of stationarity during in addition also owing to dehydration, therefore no matter the utility model technology (referring to drum-type, impeller-type and stirring-type) when being applied to pandemic three kinds of washing machines is to be used for that a kind of damping part, motor, transmission mechanism, auxiliary circuit, computer program central layer and machinery that can make washing machine and electronic programmer and whole supporting frame to reach the effect that greatly increases the service life simultaneously, and all these are the place of the final purpose of advantage of the present utility model place and the utility model technology just in a word.

Claims

1. an inner tank of washing machine that helps to crumple with dewatering stability includes inner core (1), the water dumping hole (4) on the roller (2), axle sleeve (3) and (3 ') inner core (1) sidewall, and curved surface convex tendon (5), shaft tray (7) and (7 ') is characterized in that:

A. roller (2) is the cylinder of rib more than, and the cylinder two ends are slick and sly end face, and the both ends of the surface top is respectively two thin cylinder crown of rolls (6) and (6 '), and spherical small embossment point evenly gathers in the cylinder surface;

B. at the curved surface top of curved surface convex tendon (5), press the trend of convex tendon (5), left opening after a spacing that equates is to cut out one section curved surface, the length that the length of its opening is removed the cylinder behind the slick and sly conical surface in two ends than roller (2) is slightly long, its width, fix and place shaft tray (7) with (7 ') with behind the roller (2) in open interior exactly, roller (2) can be connected along sliding with the original curved surface radian of convex tendon (5) at the column side face radian of this opening part exposed portions serve, and the width that roller (2) can freely be rotated therein, shaft tray (7) and (7) just are fixed on the both sides, inside of convex tendon (5) opening part, and roller (2) is installed in shaft tray (7) and goes up also free to rotate in (7);

C. on the sidewall of inner core (1), on three equidistant lines of every adjacent two convex tendons (5), have the opening of the equal some of spacing, the geometry of opening is similar fully to lateral projection's shape of roller (2), but area is bigger, fixing axle sleeve (3) and (3 ') on the sidewall of opening two ends inner cores (1) respectively, roller (2) is installed in the opening part between (3) and (3 '), and roller (2) should be able to freely rotate.

2. a kind of inner tank of washing machine that helps to crumple with dewatering stability according to claim 1 is characterized in that: said shaft tray (7) and (7 ') be two tools certain thickness with the tablet of inner core (1) with material, their shape and size match with the flat shape and the size of crosscut curved surface convex tendon (5) gained, downward in the hump of shaft tray (7) with (7 '), length is slightly less than on the position of roller (2) radius and respectively has a circular hole, shaft tray (7) and (7 ') can be affixed with convex tendon (5) with the part that curved surface convex tendon (5) coincide, as welding.

3. a kind of inner tank of washing machine that helps to crumple with dewatering stability according to claim 1 is characterized in that: said roller (2) has two isometric crown of rolls (6) and (6 ') respectively at its circle prism two ends, (6) can be inlaid into (6 ') in axle sleeve (3) and (3 ') and in the circular hole on shaft tray (7) and (7 '), roller (2) can be done under their support freely and rotate.

4. a kind of inner tank of washing machine that helps to crumple with dewatering stability according to claim 1 is characterized in that: said roller (2) can also be that longitudinally central axis is many ribs cylinder of hollow, the rigid elongate axle (8) that one apparent height is slick and sly and bright and clean penetrates in the hollow hole of roller (2), the exposed portions serve of slender axles (8) at roller (2) two ends can embed in axle sleeve (3) and (3 ') just, and in the circular hole on shaft tray (7) and (7 '), thereby roller (2) can freely be rotated.

5. a kind of inner tank of washing machine that helps to crumple with dewatering stability according to claim 1 is characterized in that: the shape of roller (2) can be spherical and two ends are the billiard table body of slick and sly end face.

6. a kind of inner tank of washing machine that helps to crumple with dewatering stability according to claim 1 is characterized in that, evenly is thick with the water dumping hole (4) that the aperture equates on the madial wall of inner core (1).