CN102839517A

CN102839517A - Washing machine and damping mechanism assembly method of suspension of washing machine

Info

Publication number: CN102839517A
Application number: CN2012100911852A
Authority: CN
Inventors: 堀田浩平; 西村博司; 川端真一郎
Original assignee: Toshiba Corp; Toshiba Consumer Electronics Holdings Corp; Toshiba Home Appliances Corp
Current assignee: Toshiba HA Manufacturing Nanhai Co Ltd; Toshiba Lifestyle Products and Services Corp
Priority date: 2011-06-21
Filing date: 2012-03-30
Publication date: 2012-12-26
Anticipated expiration: 2032-03-30
Also published as: JP2013000504A; CN102839517B; KR101343150B1; JP5931356B2; KR20120140599A

Abstract

The invention relates to a washing machine and a damping mechanism assembly method of suspension of a washing machine. The magneto-rheological fluid can be facilitated, and the injection operation efficiency can be improved. A water groove supported by the suspension of the damping mechanism is provided. The damping mechanism comprises a cylinder body; bearing parts independently disposed in the cylinder body; a shaft, which is inserted between the bearing parts, and can move in a reciprocating manner with the vibration of the water groove; a magnetic field generation device, which is disposed in the gap around the shaft; a sealing part, which can be used to seal two outer ends of the gap of the magnetic field generation device to form a hollow accommodation part; a magneto-rheological fluid, which is disposed in the accommodation part. When the magnetic field generation device is used to apply the magnetic field, the adhesiveness can be changed. The magnetic field generation device is provided with a coil unit and magnet yokes disposed on two sides of the coil unit. when one end of the shaft extends to the sealing part on one side of the cylinder body, and before the assembly of the bearing, the magneto-rheological fluid can be inserted in the accommodation part of the gap between the magnetic yoke exposed outside and the shaft.

Description

The damping mechanism assemble method of the suspension of washing machine and washing machine

Technical field

Embodiment of the present invention relates to the washing machine that tank is carried out the vibrationproof support, and the damping mechanism assemble method of the suspension of washing machine.

Background technology

In the past, for example in tumbling-box washing machine, tank was flexibly supported by a plurality of suspensions in the bottom of framework, and this tank possesses rotatable cylinder in inside, and this suspension is brought into play the rotation that reduces the cylinder that contains washings and the so-called damping function of the vibration that causes.

At this,, the technology (for example, with reference to patent documentation 1) of the magneto-rheological fluid (MR fluid) that has used viscosity to change according to magnetic field intensity is for example arranged as the damping function of this suspension.

Above-mentioned magneto-rheological fluid is through applying magnetic field, and viscosity that can convection cell is carried out variable control, therefore, considers recently it effectively is applied on the washing machine suspension.

Promptly; Make move up and down along with the vibration of the tank axle of (reciprocating motion) of magneto-rheological fluid contact, utilize its viscosity to suppress the resistance that moves up and down (frictional force) of axle, thus; The vibration amplitude of tank is decayed fast, thereby the washing machine of a kind of low vibration, low noise is provided.

The magneto-rheological fluid of this suspension is filled up to the hollow form resettlement section of regulation, and this hollow form resettlement section is sealed can not spill, with the outer peripheral face CONTACT WITH FRICTION of the axle that moves up and down therein.

Therefore,, must reliably be filled into the magneto-rheological fluid of ormal weight in the resettlement section in order to obtain desirable damping capacity steadily in the long term, and, also need be sealed to watertight structure that is not easy to spill etc.

Therefore; Owing to be that the package assembly in the tubular cylinder body is accommodated in the assembling of inscapes such as damping mechanism or seal member; So the resettlement section of sealing is in the hidden state of can't see from the outside; Thus, when magneto-rheological fluid being injected into inner resettlement section, be not easy to confirm whether normally injection and reliable situation such as filling.

In addition, from keeping or consideration such as cost aspect of seal, the use amount of magneto-rheological fluid is preferably few as far as possible, in the injection operation of filling this magneto-rheological fluid, needs prudent and spended time injects for narrow resettlement section, and operating efficiency is relatively poor.

[technical literature formerly]

[patent documentation]

[patent documentation 1]: TOHKEMY 2011-45755 communique

Summary of the invention

Invent technical problem to be solved

Therefore, the objective of the invention is to, the damping mechanism assemble method of the suspension of a kind of washing machine and washing machine is provided, it can reliably inject magneto-rheological fluid, and can improve the injection efficiency of operation.

The scheme that is used for the technical solution problem

Washing machine according to this embodiment; In the framework that forms shell, by suspension tank is carried out the vibrationproof support, be provided with the sink that can rotate in this tank; It is characterized in that; Above-mentioned suspension is connecting on the above-below direction and is being assembled between above-mentioned framework and the above-mentioned tank by damping mechanism, and above-mentioned damping mechanism possesses: the cylinder body of tubular; Parts of bearings, separate groups install in this cylinder body; Axle is inserted and is led between the above-mentioned parts of bearings, and an end extends to outside the above-mentioned cylinder body, and moves back and forth according to the vibration of above-mentioned tank; Magnetic field generation device is provided in the above-mentioned cylinder body with the mode that around this, forms the gap; Seal member, it is assembled into, seal this magnetic field generation device above-mentioned gap two outboard end and form the resettlement section of hollow; And magneto-rheological fluid, being filled into above-mentioned resettlement section, viscosity changes when being applied in magnetic field through above-mentioned magnetic field generation device, and above-mentioned magnetic field generation device possesses: coil unit, the coil that produces magnetic field reeled to be installed on the bobbin and to form; And yoke; Be provided in the both sides of this coil unit; Form fluid passage at least one side yoke in above-mentioned yoke, this fluid passage is communicated to and is located at and the above-mentioned gap between above-mentioned, above-mentioned fluid passage is made as the injection portion that is used for filling to above-mentioned resettlement section magneto-rheological fluid.

In addition, according to the damping mechanism assemble method of the suspension of the washing machine of this embodiment, in washing machine; In the framework that forms shell, by suspension tank is carried out the vibrationproof support, be provided with the sink that can rotate in this tank; This damping mechanism assemble method is characterised in that; Above-mentioned suspension is assembled between above-mentioned framework and the above-mentioned tank connecting on the above-below direction by damping mechanism, and above-mentioned damping mechanism possesses: the cylinder body of tubular; Parts of bearings, separate groups are contained in this cylinder body; Axle is inserted and is led between the above-mentioned parts of bearings, and an end extends to outside the above-mentioned cylinder body, and moves back and forth according to the vibration of above-mentioned tank; Magnetic field generation device is provided in the above-mentioned cylinder body with the mode that around this, forms the gap; Seal member, it is assembled into, seal this magnetic field generation device above-mentioned gap two outboard end and form the resettlement section of hollow; And magneto-rheological fluid, being filled into above-mentioned resettlement section, viscosity changes when improving above-mentioned magnetic field generation device and be applied in magnetic field, and above-mentioned magnetic field generation device possesses: coil unit, the coil that produces magnetic field reeled to be installed on the bobbin and to form; And yoke; Be provided in the both sides of this coil unit; The above-mentioned seal member and the above-mentioned parts of bearings that are positioned at a side of extending outside the above-mentioned axial cylinder body are being assembled under the state before, and above-mentioned magneto-rheological fluid can be injected into the above-mentioned resettlement section from being exposed to an outside above-mentioned side yoke and the above-mentioned gap of between centers.

Thus, the damping mechanism assemble method of the suspension of a kind of washing machine and washing machine can be provided, it can reliably inject magneto-rheological fluid, and can improve the injection efficiency of operation.

Description of drawings

Fig. 1 is the longitudinal section that amplifies the part of the suspension that expression first embodiment is shown.

Fig. 2 is the longitudinal section that the agent structure of suspension is shown.

Fig. 3 is the stereoscopic figure of suspension.

Fig. 4 (a) is that the A-A line in Fig. 1 cuts off and the cross-sectional view that illustrates, and Fig. 4 (b) is the cross-sectional view that variation is shown.

Fig. 5 is the longitudinal section that the integrally-built summary of washing machine is shown.

Fig. 6 (a) is that the B-B line in Fig. 4 (a) cuts off and the longitudinal section that illustrates, and figure (b) is the longitudinal section that the structure of accomplishing with the assembling of a part is shown.

Fig. 7 is the figure that is equivalent to Fig. 6 that variation is shown.

Fig. 8 is the figure that is equivalent to Fig. 6 that different variation is shown.

Fig. 9 is the figure that is equivalent to Fig. 6 (b) that various variation (a) and (b), (C) are shown.

Figure 10 is the figure that is equivalent to Fig. 1 that second embodiment is shown.

Figure 11 is the figure that is equivalent to Fig. 2.

Description of reference numerals:

1: framework, 6: tank, 7: suspension, 10: cylinder (sink); 22: cylinder body, 24: axle, 25: helical spring, 31,32: parts of bearings; 33,64: resettlement section, 34,35: seal member, 36: magneto-rheological fluid, 40,60: magnetic field generation device; 43,44,61,62,63: yoke, 46,56: coil unit, 48,49,51,52,65～70: fluid passage, 50,71: injector

The specific embodiment

(first embodiment)

Below, with reference to Fig. 1～Fig. 9, first embodiment of using in the tumbling-box washing machine is described.At first, tumbling-box washing machine shown in Figure 5 (below, simply be called washing machine) be washing machine with functions/drying, its integrally-built summary is described.

Substantial middle portion at the front face (diagram right side) of the case shape framework 1 that forms shell forms washings gateway 2, and the door 3 that this gateway 2 is opened and closed is set.In addition, be provided with guidance panel 4 on the top of the front face of framework 1, side is provided for moving the control device 5 of control within it.

In the inside of framework 1, set tank 6.This tank 6 forms cylindric with axial transverse axis as front and back; By the base plate 1a that is configured in framework 1 is last and with pairing left and right (only the illustrate a side) suspension 7 (detailed content will be explained below) of length direction as above-below direction, the state that former direction tilts is by resiliency supported.

Motor 8 is installed by one at the back side of tank 6.This motor 8 for example is made up of the brushless electric machine of direct current, is outer rotor shape, and the not shown rotating shaft of the central part that is installed in its rotor 8a is inserted via bearing bracket 9 led to the inside of tank 6, and the central portion of the back side portion of the cylinder of stating after being connected to 10.

Above-mentioned cylinder 10 is provided in tank 6 inside; Play the function of the rotatable sink that is used to accommodate washings; Above-mentioned cylinder 10 with in to establish the tank 6 of cylinder 10 same; Form with it axially cylindricly, be connected with the rotating shaft of above-mentioned motor 8 as the transverse axis of fore-and-aft direction, and with supported with the acclivitous state in the place ahead of tank 6 coaxial shapes.

Its result, cylinder 10 is directly driven by motor 8 and rotates around transverse axis, and motor 8 plays the function of the drum drive that makes cylinder 10 rotations.

In addition, whole all sidepieces (main part) of cylinder 10 form a plurality of can water flowing and the aperture 11 of ventilation, with respect to this, tank 6 form aporate roughly can water storage structure.

These cylinders 10 and tank 6 all in front portion have peristome 12,13, the flexible capsule 14 of ring-type has been installed between the peristome 13 of tank 6 therein and the washings gateway 2.Thus, washings gateway 2 is connected to the inside of cylinder 10 via flexible capsule 14, the peristome 13 of tank 6 and the peristome 12 of cylinder 10.

In addition, the minimum position at tank 6 that can water storage connects drainpipes 16 in the centre by draining valve 15, thereby can draining outside machine.

At this, the structure of above-mentioned functions/drying is described, from the rear side of tank 6 to the top and the place ahead be provided with drying unit 17.This drying unit 17 comprises: air-supply arrangement 19, and heater 20, and have the circulation pipe 18 of not shown desiccant body etc.If when drying is moved; Carry out generating so-called dry wind and returning the repetitive cycling process in (supplying to) tank 6, thereby the washings in the cylinder 10 that is driven in rotation are carried out drying dehumidifying from tank 6 interior airborne moisture of discharging, then heating.

In addition, about the concrete structure of above-mentioned suspension 7, describe with reference to Fig. 2, the overall structure shown in 3.As the schematic construction of suspension 7, as shown in Figure 5, between the base plate 1a and tank 6 of above-mentioned framework 1, connection is provided with suspension 7 on above-below direction.This suspension 7 possesses: cylinder apparatus 22 cylindraceous, be installed in installing plate 21 sides, and pull on the 1a at the end that this installing plate 21 is located at framework 1; Axle 24 is inserted with the mode that can reciprocating motion promptly moves up and down and to be led in cylinder body 22; And helical spring 25, the upper end that becomes this end of 24 is installed in installing plate 23 sides, and this installing plate 23 is located on the tank 6, and this helical spring 25 is installed in from cylinder body 22 around the outside outstanding axle 24 that extends in top.

For this suspension 7 is assembled in the framework 1; Shown in the longitudinal section of Fig. 2; Mode in the bottom of cylinder body 22 with the lower open end of inaccessible cylinder body 22 embeds cylinder body connecting portion 22a; By elasticity seat boards 26 such as rubber etc., with nut 27 this connecting portion 22a is connected to the installing plate 21 of base plate 1a shown in Figure 5, thereby cylinder body 22 is installed and fixed the installing plate 21 of base plate 1a side.

In addition, cylinder body 22 is made of iron, specifically, possess with after the cylinder body 22 stated together constitute the magnetic field generation device 40 etc. of damping mechanism 30.

On the other hand, axle 24 comprises: axle principal part 24a, and Lower Half is inserted in the inside of cylinder body 22; And axle connecting portion 24b, be integrally connected to the upper end of principal part 24a.At least axle principal part 24a is a magnetic made of iron.

By elasticity seat board 28 etc., be connected on the installing plate 23 of tank shown in Figure 56 with the connecting portion 24b of nut 29 axle 24, thus, axle 24 is connected into the vibration of following tank 6 and motion on above-below direction etc. integratedly.

In addition; As shown in Figure 2; The bottom of helical spring 25 is supported on the outer upper end portion of the cylinder body 22 that constitutes damping mechanism 30, and the upper end of helical spring 25 is caught by discoideus spring fastening 41 and installed with the state that elastic force is accumulated, and discoideus spring fastening 41 is installed in the top of axle 24.

Promptly; Axle 24 is applied the state stretch-draw that is pulled out to the outside power in top from cylinder body 22 axle 24 is set; Certainly, on axle 24, be provided with the mechanism's (will be elaborated in the back) that is used to prevent axle 24 disengagings, can be so that axle 24 is remained on to the position more than the outstanding ormal weight in top.

At this,, the concrete structure of above-mentioned damping mechanism 30 is described equally with reference to Fig. 2.This damping mechanism 30 possesses: cylinder body 22; Parts of

bearings

31,32, inner at the tubular of cylinder body 22, in separately assembling of upper-lower position; Axle 24, along with the vibration of tank 6 move back and forth (in this embodiment for moving up and down), this axle 24 is inserted and is led to 31,32 of parts of bearings, and this conduct of 24, one distolateral upside extends to outside the cylinder body 22.

And possess: magnetic field generation device 40 is provided in the cylinder body 22 with the mode that around axle 24, forms clearance G;

Seal member

34,35 is assembled into two outboard end (upper and lower end parts) of the clearance G of shutoff magnetic field generation device 40, thereby forms the resettlement section 33 (with reference to Fig. 1) of hollow and annular; Magneto-rheological fluid 36 (will be elaborated in the back) is filled in the resettlement section 33, and when applying magnetic field by magnetic field generation device 40, viscosity changes.

In said structure, the escapement about the axle 24 that remains on the assigned position in the cylinder body 22 specifies according to Fig. 1,2.

At first,, the stop ring 37 of ring-type is installed in the bottom of axle 24, in addition,, is assembled with the parts of bearings 32 that is hollow tube-shape at the cardinal principle pars intermedia of the above-below direction of cylinder body 22 in cylinder body 22 sides in axle 24 sides.

This parts of bearings 32 possesses: the bear box 32a that is made up of the nonmagnetic material of aluminum; And in the inside of bear box 32a chimeric fixing annular bearings 32b.In addition, this bearing 32b carries out sliding support to axle 24, so that axle 24 can reciprocating motion on also as axial above-below direction.In addition, the example of bearing 32b is that sintered oil-retaining bearing constitutes by the copper as nonmagnetic material.

The bottom of this bear box 32a is disposed at the position of neck 22b of contact cylinder body 22, this neck 22b be cylinder body 22 in the cardinal principle middle part to the position that radially (interior side) dwindles, through ca(u)lk or be pressed into chimeric fixing this bear box 32a.

Side configuration card stop ring 37 below this parts of bearings 32, this stop ring 37 are located at inserts the bottom that axis holds the axle 24 of 32b, and thus, through the lower surface of stop ring 37 butt parts of bearings 32, axle 24 is restricted to the mobile of top.

Wherein, the below of the neck 22b of cylinder body 22 forms blank part 22c, feasible axle 24 freedom of movement downwards.

As implied above, the parts of bearings 32 that is configured in lower side plays the effect of axes 24 to the mobile structure of extracting of top, and, keep bearing 32b, also be used for the seal member 35 of mounted thereto side is kept.

The damping mechanism 30 that comprises sealing parts 35 is accommodated in the cylinder body 22, be clamped in seal member 35 thus and parts of bearings 32 between, thereby accommodated fixing reliably.The edge 35a of interior all sides of seal member 35 is crimped onto axle 24 outer peripheral face, performance to and after the sealing property that seals of clearance G between the axle 24 stated.

On the parts of bearings 32 and seal member 35 of above-mentioned downside, in the position that separates as the open end side of the upside of cylinder body 24, same material and identical shaped substantially parts of bearings 31 and seal member 34 are fixing with opposed state assembling in fact.

Therefore, parts of bearings 31 is made up of bear box 31a and bearing 31b, and in addition, the seal member 34 of upper side possesses the edge 34a that waterproof is used.

In this embodiment, as shown in Figure 5, this parts of bearings 31 and seal member 34 are positioned at upper side under the state that is assembled into suspension 7, and promptly parts of bearings 31 and seal member 34 are in the state that parts of bearings 32 and seal member 35 with lower side dispose opposed to each other.

As shown in Figure 2, the difference between the shape of the bear box 31a of upper side and the bear box 32a of lower side is, on central authorities, gives prominence to being provided with cylindraceous the 31c of portion with the mode of an integral body.Even the 31c of this have under the assembling completion status of the open end that crown lid 39 is covered cylinder body 24 also from cover 39 to above outstanding height.

The parts of bearings 31 and the seal member 34 of upper side are assembled into the upper end in the cylinder body 24, for example, after carrying out bear box 31a through ca(u)lk chimeric fixing, through being pressed into, the lid 39 chimeric outsides that are fixed to the open side upper end of cylinder body 24.

In addition, in the outside that is projected into this pedestal 31c above lid 39, the downward direction crimping keeps the bottom of helical spring 25, that is, helical spring 25 remain on the compressive state that can stretch and spring fastening 41 between.

In addition, axle 24 is configured to, and is last by each bearing 31b, 32b that axle is supported on the top and the bottom parts of

bearings

31,32 that constitutes Bearning mechanism with mode that can sliding-contact, and, can move back and forth through

seal member

34,35 watertight ground sliding-contacts.

At this, with reference to Fig. 2, to be assembled into above-mentioned top and the bottom parts of bearings 31, the concrete structure of magnetic field generation device 40 between 32 describes.

In this embodiment, this magnetic field generation device 40 has: be wound on axle 24 around and produce the coil 42 in magnetic field (magnetic field); And the short

cylindric yoke

43,44 made of iron that is located at the top and the bottom of coil 42.When to coil 42 energising, around coil 42, the magnetic loop D (the with dashed lines arrow is represented among Fig. 2) that forms through flux by the

yoke

43,44 of top and the bottom.

And; If the concrete structure to this magnetic field generation device 40 describes; Then like Fig. 1, shown in 2; Coil 42 is wound on the bobbin 45 of hollow cylindrical and constitutes coil unit 46, and insert between the outer peripheral face of the axle 24 in the hollow bulb that leads at the central part of coil unit 46, form clearance G cylindraceous.

In addition, disposed in the top and the bottom of this coil unit 46 under the state of

yoke

43,44, for example; By thermoplastic resin (nylon, PBT, PET; PP etc.) carry out resin forming (among the figure, representing) and constitute an integral body, constitute magnetic field generation device 40 with resin forming portion 47.

At this moment; Between the outer peripheral face of the

hollow form yoke

43,44 of top and the bottom and axle 24, (for example also has narrow and small gap cylindraceous; 0.4mm degree); The result who is communicated with (this both gap size also can be inequality) with the gap that is formed by coil unit 46 (bobbin 45) and integrates is formed on the above-mentioned clearance G (below, each gap is also marked mark G describe) of the upwardly extending hollow cylindrical of upper and lower.

Especially,

yoke

43,44 and axle each narrow and small clearance G between 24 forms magnetic loop D, is set to the size of regulation, and this given size is fit to that magneto-rheological fluid 36 is applied in magnetic field and its viscosity changes and can obtain desirable viscosity rapidly.

Magnetic field generation device 40 forms clearance G around axle 24; And; The

seal member

34,35 that is configured in the top and the bottom of magnetic field generation device 40 respectively is configured in axle 24 outer peripheral face with crimped status, and therefore, the upper and lower end parts of clearance G is by the sealing maintenance of watertight ground; Thus, around axle 24, form airtight cylindraceous above-mentioned resettlement section 33.

As showing clearly among Fig. 1,2 etc., in this resettlement section 33, inject and fill magneto-rheological fluid 36.At this; Magneto-rheological fluid 36 is the fluids that change viscosity through applying of electric energy; Its viscous characteristics changes according to magnetic field intensity; For example in poly-a-olefin oil is the base oil of main body, disperseed ferromagnetism particles such as iron, carbonyl iron to constitute, formed the group bunch of chain through ferromagnetism particle when applying magnetic force, thereby promote apparent viscosity.

Therefore; Along with flowing to the direction of arrow in the magnetic field of the magnetic loop D that around coil 42, produces to coil 42 energisings; That is the magnetic loop D that, produces at coil 42 is with the path formation of yoke 44 → resettlement section 33 (the clearance G) → axle 24 of yoke 43 → cylinder body 22 → lower side on axle 24 → resettlement section 33 (clearance G) → top.

In addition, being filled into the injection of the magneto-rheological fluid 36 in this resettlement section 33, is to have assembled under the state of seal member 35 and parts of bearings 32 of magnetic field generation device 40 and lower side through the axle 24 in being housed in cylinder body 22 to carry out.

That is, the state before seal member 34 and the parts of bearings 31 of assembling upper side is carried out down, that is, and and from clearance G side injection magneto-rheological fluid 36 as the open yoke 43 in one of resettlement section 33 distolateral upper end.

Specifically, in this embodiment,, make like Fig. 1 and structure shown in Figure 4 in order to inject operation more efficiently.Fig. 1 is the longitudinal section shown in amplifying the part of suspension 7, and Fig. 4 is that the A-A line in Fig. 1 cuts off and the cross-sectional view that illustrates.

Wherein, Fig. 4 (a) illustrates this embodiment, and the

yoke

43,44 in top and the bottom is formed with the fluid passage 48,49 (with reference to Fig. 1) of groove shape; This

fluid passage

48,49 is communicated with clearance G; And have the sectional area of the semi-circular shape bigger than this gap size, and respectively along extending axially, and; These

fluid passages

48,49 are located at the same position of circumferencial direction respectively, thereby on as axial above-below direction, are arranged on the straight line.

In addition, at the opposition side of each

fluid passage

48,49 of each

yoke

43,44, the

fluid passage

51,52 that sectional area

ratio fluid passage

48,49 is little is located at the same position of circumferencial direction to be aligned to the mode on the straight line in the axial direction.

Therefore, possess different a plurality of (in the embodiment 2)

fluid passage

48,51 of sectional area in the yoke 43 of upper side, and, the

fluid passage

49,52 of sectional area different a plurality of (in the embodiment being 2) be provided with too in the yoke 44 of lower side.

When magneto-rheological fluid 36 is injected in resettlement section 33; As shown in Figure 1; The fluid passage 48 that sectional area on the yoke that is formed on upper side 43 is big inserts the part of the needle point 50a of injector 50; Exert pressure can extrude and inject magneto-rheological fluid 36 through the pressing operation of action bars 50b, fluid passage 48 plays the function of the injection portion of magneto-rheological fluid 36, will in the Action Specification of back, be elaborated to this.

In addition; After injecting magneto-rheological fluid 36; As shown in Figure 2, be assembled into the seal member 34 of upper side and parts of bearings 31 in the axle 24, and after accommodating in the cylinder body 22; For example the open end side of cylinder body 22 is carried out ca(u)lk and process and fix, thereby make resettlement section 33 constitute airtight state.

Afterwards, will cover 39 be pressed into after chimeric fixing, and, configuration assembling helical spring 25 around the pedestal 31c of the parts of bearings of the upper end of this cylinder body 22, thus be assembled into suspension 7.

In addition, in this embodiment, attaching parts 24b is connected on the principal part 24a so that the mode that unloads can be installed, and helical spring 25 is inserted around the axle principal part 24a, and catch the upper end of helical spring 25 and connection attaching parts 24b with spring fastening 41.

The suspension 7 that as above constitutes; On the base plate 1a and the above-below direction between the tank 6 of framework 1; As shown in Figure 5,, and be provided with in framework 1 side under the state of connecting portion 22a of cylinder body 22 from cylinder body 22 outstanding axle 24b and helical spring 25 in tank 6 side settings; Suspension 7 is configured in the left and right sides of tank 6 respectively, supports suspension 7 flexibly to connect.

In addition; 2 lead-in wires 38 of drawing from coil 42 are drawn out to the outside from the position of yoke 43 sides on top; Be connected to control device 5 through not shown drive circuit, thereby carry out break-make electric control, can carry out the damping control of vibration attenuation to the coil 42 of magnetic field generation device 40.

In addition; Fig. 6～Fig. 8 is that the B-B line in Fig. 4 (a) cuts off and the longitudinal section that illustrates and the figure suitable with it; In addition, Fig. 9 is the figure that is equivalent to Fig. 6 (b) of the various variation of expression, after the Action Specification below; Mainly these accompanying drawings as Action Specification figure, should be used for successively describing.

Then, the effect to the washing machine of said structure describes.

In the washing machine that possesses transverse axis cylinder 10 on every side of this embodiment, in each stroke of washing, rinsing, dehydration and drying, control device 5 carries out drive controlling with suitable rotary speed respectively with cylinder 10 and automatically performs operation.In addition, cause by the inclined to one side load that is housed in the washings (not shown) in the cylinder 10 etc. and when cylinder 10 produces vibration, also mainly on above-below direction, vibrated by the tank 6 that flexibly supports.

Along with the up-down vibration of this tank 6, in suspension 7, make the axle 24 and the helical spring between the cylinder body 22 25 that connect in one on the tank 6 flexible, axle 24 is moving back and forth in cylinder body 22 on the above-below direction.Helical spring 25 is through its telescopic action absorbed oscillation, and performance effectively stops the function to the transfer of vibration of framework 1 (base plate 1a) side.

In addition, the damping mechanism 30 that is made up of cylinder body 22, magnetic field generation device 40 etc. is brought into play the effect of quick damped vibration.

That is, when the operation that cylinder 10 rotations are driven, produce magnetic field to the coil that constitutes magnetic field generation device 40 42 energisings.Thus; Around coil 42, form magnetic loop D (with reference to Fig. 2), wherein, especially between flux density higher each

yoke

43,44 of top and the bottom and axle 24; Also receive the also narrow and small influence of clearance G; The viscosity that is applied in the magneto-rheological fluid 36 in magnetic field at the position, gap sharply raises, thereby strengthens the reciprocating frictional resistance to the above-below direction of axle 24, and its result makes the vibration amplitude of tank 6 decay fast.

Especially, in dehydrating operation, near the resonance point at the rotation initial stage that cylinder 10 is rotated at a high speed, have vibration and sharply become big tendency, effectively bring into play the so-called damping of this vibration of decay fast.Therefore, can continue to carry out the dehydrating operation smoothly that can not cause abnormal vibrations or abnormal sound.

As implied above, in order to make damping mechanism 30 effectively play a role, need be filled into magneto-rheological fluid 36 reliably in the resettlement section 33.Therefore; As shown in Figure 1, in this embodiment, the side outside axle 24 extends to cylinder body 22; Promptly; To before assembling as the seal member 34 side, upper side and the parts of bearings 31 that are positioned at tank 6 sides, can in resettlement section 33, inject magneto-rheological fluid 36 by injector 50 from the clearance G that forms between the yoke 43 that is exposed to outside the same side and the axle 24.In addition, in this embodiment, for example, in injector 50, accommodated the magneto-rheological fluid 36 that can repeatedly fill up the amount of resettlement section 33.

But, particularly at first as shown in Figure 1 when injecting, same with the situation (with reference to Fig. 5) of on above-below direction, assembling as suspension 7, keep cylinder body 22 with the state that on above-below direction, erects.

The upper end surface of the yoke 43 of upper side is in opened state.Therefore, the opening in the upper end of the fluid passage 48 of the groove shape of yoke 43 inserts the part of the needle point 50a of injector 50, and action bars 50b is carried out pressing operation.

Thus, the magneto-rheological fluid 36 that is injected is pressed and gravity is filled into after the inside recess of seal member 35 of lower side fast through injecting in the diffusion of the clearance G side of circumferencial direction, fills resettlement section 33 (clearance G) from the lower direction top successively.

When filling up substantially in the resettlement section 33, the upper end of the magneto-rheological fluid 36 of rising is exposed to the outside from the fluid passage 51 and the clearance G of the yoke 43 of upper side.

With reference to illustrated Fig. 6 (a) this state is described; This Fig. 6 (a) is that the B-B line in Fig. 4 (a) cuts off and the longitudinal section that illustrates; The cross section of the clearance G that the yoke 43 of upper side had is shown; And, fill magneto-rheological fluid 36 in clearance G, and can be visually observed from outside top expose state.

The operating personnel who injects operation is the magneto-rheological fluid 36 that exposes from this clearance G of visualization easily.That is, this exposes state is shown in Fig. 4 (a), the state that exposes from the full week of cardinal principle of annular gap G when observing from the top, and, also expose from the open upper end side of fluid passage 51.Therefore, can be from the outside visual this state easily, and, can observe and learn and filled up by magneto-rheological fluid 36 substantially in the resettlement section 33 and close to an end and inject the situation of operation.

As implied above, the operating personnel can inject operation in the filling state of Visual Confirmation magneto-rheological fluid 36, so can suitably add and subtract injection rate, the perhaps efficient suitable injection operation of injection rate of carrying out and finishing magneto-rheological fluid 36.

Particularly in this embodiment; On the

yoke

43 and 44 of top and the bottom, identical shaped

fluid passage

48,49 and 51,52 are set respectively with the mode that is arranged in the axial direction on the straight line; And; As injection portion, can make the needle point 50a of injector 50 inject corresponding magneto-rheological fluid 36 easily with the fluid passage 48 of yoke 43 sides on wherein top.

Thus, form the axial cross section injection path bigger,, can also be injected into lower area to magneto-rheological fluid 36 fast except inserting easily at its entrance side the needle point of injector 50 than narrow and small clearance G.

And, dispose in a straight line respectively owing to be positioned at each

fluid passage

48,49 and 51,52 of top and the bottom, therefore, further carry out flowing of magneto-rheological fluid 36 smoothly.

At this moment, if be not discharged to the outside to the air in the resettlement section 33 fast, then the filling of magneto-rheological fluid 36 becomes imperfect, and is unfavorable when carrying out the injection operation fast.

In this embodiment; Shown in Fig. 1 and Fig. 4 (a); Can utilize the

fluid passage

51,52 that is formed on the opposition side that injects side to extract air easily from lower area; The air in the narrow and small clearance G zone of yoke 43 sides is flowed well, and air does not take place to be detained and can be discharged to the outside fast.

In addition, magneto-rheological fluid 36 be filled into Fig. 6 (a) can be visual state after, finish to inject operation after replenishing a little.This is because in the cylinder body 22 after injecting shown in Fig. 6 (b), assemble seal member 34 and parts of bearings 31 etc., thereby resettlement section 33 is made the inside recess of the seal member 34 of upper side filled up by magneto-rheological fluid 36 by under the assembling completion status of shutoff.

Wherein, the recess of the seal member 34 of this upper side also can access desirable damping action even without being filled up by magneto-rheological fluid 36.

As described above; Washing machine according to first embodiment; In the suspension 7 that tank 6 is carried out the vibrationproof support, be employed in the damping mechanisms 30 of enclosing magneto-rheological fluids 36 in the cylinder body 22 and forming, the viscosity of this magneto-rheological fluid 36 changes when applying magnetic field through energising; The vibration of the tank 6 that produces in the time of therefore, can decaying the dehydrating operation that makes cylinder 10 high speed rotations fast.

This magneto-rheological fluid 36 is enclosed in the resettlement section 33 that is enclosed in the damping mechanism 30; When injecting magneto-rheological fluid 36; Carry out under the state before assembling seal member 34 and parts of bearings 31 and inject, sealing parts 34 and parts of bearings 31 are positioned at axle 24 and extend to tank 6 one sides outside the cylinder body 22.

Therefore, the end face of the yoke 43 of the same side is opened and is exposed under the outside state, for example utilizes injector 50, is injected in the resettlement section 33 from the injection portion that is communicated with the clearance G that is formed between the axle 24.

Thus, can reliably be arranged on needle point 50a the inlet of resettlement section 33, and; Can be easily from the injection state of outside visualization in resettlement section 33; Can inject reliably, can access the effective damping that has utilized magneto-rheological fluid 36, and; Inject operation and become easily, can expect the raising of operating efficiency.

According to this embodiment, if be filled into the state that clearance G that magneto-rheological fluids 36 in the resettlement section 33 are in the yoke 43 from top is overflowed, the state that perhaps soon overflows, then can be from the top visual these situation.Therefore, the operator can confirm occupied state, can learn the situation that operation closes to an end of injecting.

Its result, operating personnel can carry out based on visual injection operation, can not take place correctly to inject magneto-rheological fluid 36 under the excessive or not enough situation of injection rate apace, therefore can improve operating efficiency.

Especially; In this embodiment, same with the state (direction) of having assembled suspension 7, inject operation with the state that keeps cylinder body 22 to point to above-below direction; Thus; Can fill fast to the lower area of magneto-rheological fluid 36, and the magneto-rheological fluid 36 that can be visual easily exposes from the yoke 43 and the clearance G ring-type between the axle 24 of upper side, operating efficiency can further be improved.

And, in this embodiment,, formed the trough flow body path 48 that is communicated with clearance G in yoke 43 in order be easily to inject operation from the clearance G of the narrow dimension of the yoke 43 that is exposed to outside upper side.

Fluid passage 48 extends in the axial direction, and the sectional area of semicircular in shape shape, for example, has the sectional area of the size of the needle point 50a that can insert injector 50 at least.Therefore; Can insert the part of the needle point 50a of injector 50 to this fluid passage 48, and inject magneto-rheological fluid 36, thus; The injection operation of carrying out magneto-rheological fluid 36 under the situation on every side easily can be exposed to; Therefore, fluid passage 48 plays the function of the injection portion of magneto-rheological fluid 36, makes contributions to injecting the efficiency of operation raising.

In this case; As stated, a yoke 43 at least one side (upper side) has as the structure of the fluid passage 48 of injection portion also more effective, still; In this embodiment; In the yoke 44 of opposite side (lower side) fluid passage 49 of same way as is set, therefore, has the advantage that magneto-rheological fluid 36 further is injected into the end (seal member 35) of resettlement section 33 apace.

And; Opposition side at the

fluid passage

48,49 of

yoke

43,44 is provided with

fluid passage

51,52 respectively, therefore, when injecting, can effectively play the effect of necessary extracting air; The filling state in the resettlement section 33 can be reliably satisfied, the injection operation can be carried out more efficiently simultaneously.

In this case, shown in Fig. 1 and Fig. 4 (a), in this embodiment, the sectional area of

fluid passage

48,49 that the sectional area ratio that is mainly used in the

fluid passage

51,52 of extracting air injects side is little.

This helps reducing the use amount of the magneto-rheological fluid 36 of high price, and, for fluid passage 51 wherein, the magneto-rheological fluid 36 that can visual easily end face from it exposes.Therefore; At least one fluid passage 48 in a plurality of fluid passages is as injection portion, littler than the sectional area of this fluid passage 48 as if forming the sectional area of other fluid passages, then can make the sectional area in the resettlement section 33 less; Therefore, can reduce the use amount of magneto-rheological fluid 36.

Wherein, be not limited thereto, shown in Fig. 4 (b), can be deformed into, the fluid passage 48 (only illustrating 2 positions) of same sectional area of the effect of injection portion has been set at all fluid passages (supplying with 4 positions).

At this moment, because sectional area is all bigger, therefore, extracting air is also quite good certainly, and, can not get wrong and inject position etc. a plurality of positions (2 place) as injection portion, implement to inject operation easily.Just, compare with above-mentioned embodiment, the sectional area in the resettlement section 33 increases, and therefore, the use amount of magneto-rheological fluid 36 increases a little.

In addition, so that the

fluid passage

48,49 and 51,52 of each

yoke

43,44 is arranged mode in a straight line respectively, promptly the same position at circumferencial direction sets, and therefore, flowing of the magneto-rheological fluid 36 in the time of can making injection is more smooth.

Under this situation, be arranged to that same position is just passable in a circumferential direction, can make the inflow of magneto-rheological fluid 36 become smooth as long as inject the fluid passage 49 of fluid passage 48 and the opposite side of side to the major general.

In addition, in the above-described embodiment, inject when closing to an end, shown in Fig. 6 (a), can the visual magneto-rheological fluid 36 that rises from the below be exposed to the situation of the upper end of fluid passage 51 or clearance G at magneto-rheological fluid 36.But, since the size of the clearance G of this ring-type narrow and small (for example, 0.4mm), therefore, according to operating environment, sometimes can not be in early days the visual magneto-rheological fluid that exposes 36 easily.

Therefore, in this case, can implement like Fig. 7, the shown in Figure 8 distortion.

Wherein, Fig. 7 is the figure that is equivalent to Fig. 6, shown in Fig. 7 (a), in the yoke 43 of upper side; To and axle 24 between the bight of rectangular shaped of interior all side end 43a of the clearance G that forms, on full week, for example carrying out substantially, chamfer machining is made as plane chamfered section H.Therefore, the clearance G of interior all side end 43a form the cross section to foreign side with horn-like form of widening.

Therefore, shown in Fig. 7 (a), when reaching magneto-rheological fluid 36 from the state that exposes the upper end of clearance G; From above when observing; Exposing more than clearance G wide band shape and ring-type, the operating personnel can visual easily situation about exposing from fluid passage 51, can confirm to carry out situation as early as possible; Correspondingly, can efficiently carry out the injection operation.

In addition, Fig. 6 (b) of Fig. 7 (b) and front is same, and therefore the state after assembling after the injection that finishes ormal weight is shown accomplishes, is illustrated in the state of filling and sealed magneto-rheological fluid 36 in the inside recess of the seal member 34 after the assembling.

In addition, the variation shown in Fig. 8 (a) and (b) is compared with the plane chamfered section H of above-mentioned Fig. 7, the chamfered section M that is made as dome shape a bit on different, other are identical.When like this bight chamfering being become spherical shape, have the action effect identical in fact with the situation of above-mentioned flat shape, the Therefore, omited specifies.

On the other hand, Fig. 9 be the various variation of expression with the suitable figure of Fig. 6 (b), the variation of the use amount of effective minimizing magneto-rheological fluid 36 is shown.

At first, the structure shown in Fig. 9 (a) is set as the chamfered section M of dome shape with interior all side end 43a of the yoke 43 of upper side, so it adopts the identical mode of variation with Fig. 8 (a) of front.

On the other hand, the seal member 53 of the clearance G between this upper face side is installed and is used to seal with spools 24 has edge 53a, the 53b of last inferior division.That is, edge 53a is crimped onto axle 24, and the edge 53b of lower side is crimped onto the chamfered section M of dome shape of interior all side end 43a of yoke 43, thereby seal clearance G forms resettlement section 33.

Therefore, in this structure, magneto-rheological fluid 36 is prevented to the inflow of the inside of seal member 53 recess, thus, can further reduce the use amount of magneto-rheological fluid 36.

At this moment, though not shown, adopt identical shape through seal member with lower side, more efficient, and the waste use of minimizing magneto-rheological fluid 36, more favourable aspect cost.In addition, edge 53b is crimped on the chamfered section M of dome shape, therefore, has the advantage of the crimped status that obtains watertight easily.

Then, Fig. 9 (b) is the variation of the mode that other structures are identical with first embodiment except seal member 54.

Seal member 54 and the variation shown in Fig. 9 (a) have two edges equally, that is, possess: with the edge 54a of axle 24 crimping; The edge 54b of the upper surface of interior all side end 43a of crimping yoke 43 can reduce the use amount of magneto-rheological fluid 36 etc., has the action effect identical with above-mentioned variation.

In addition, Fig. 9 (c) is except seal member 55, and other structures are set as the identical mode of variation with above-mentioned Fig. 9 (b).

Seal member 55 is provided with 1 edge 55a, and utilizes the table back of the body two sides of edge 55a, be crimped onto axle 24 and in all side end 43a.

In view of the above, can constitute the simple structure of 1 edge 55a, and, with the openend of the direct inaccessible clearance G of leading section of edge 55a, further reduce the use amount of magneto-rheological fluid 36 thus.

In addition; In this embodiment, in injector 50, accommodated the magneto-rheological fluid 36 that can repeatedly fill up the amount of resettlement section 33, but also can accommodate once amount; At this moment; Through whole injections, can inject the magneto-rheological fluid 36 of ormal weight, the management of injecting operation or injection rate becomes simple.

At this moment, be filled into magneto-rheological fluid 36 in the resettlement section 33 state or the state that is about to overflow above the clearance G of yoke 43 spills into through visual identification, can be through Visual Confirmation normal and reliable situation of filling.

And, can carry out handwork based on the pressing operation of the action bars 50b of injector 50, also can mechanically control automatically.For example, utilize not shown press device that action bars 50b is mechanically carried out pressing operation, control rate and time when pushing injector 50, can be filled into the magneto-rheological fluid 36 of necessary amount several times in the resettlement section 33, can inject operation automatically.

At this moment, can mechanically inject the magneto-rheological fluid 36 of ormal weight, therefore, need not spill into the injection rate of the top degree of yoke 43.Certainly, with above-mentioned same,, can fill to normal reliable thus through visual from clearance G.

In addition; The insertion position of the needle point 50a of injector 50 is not limited to above-mentioned embodiment, for example, also can be inserted into the position of the lower area that arrives resettlement section 33 through the yoke 43 on top afterwards; At this moment; Inject when drawing needle point gradually, thus, can from the lower area to the upper area, fill magneto-rheological fluid 36 smoothly reliably and inject.

In addition; The seal member that is positioned at the top and the bottom of damping mechanism prevents that mainly the leakage of magneto-rheological fluid is excessive, thereby forms the resettlement section, in addition; Also can be considered and axle between the form of constant friction resistance (damping force); For example, also can comprise the various distortion of quantity the edge that is used for watertight as structure that has spring etc.

(second embodiment)

Figure 10 and Figure 11 are the figure that is equivalent to Fig. 1 and Fig. 2 that second embodiment is shown, below, to above-mentioned embodiment in fact same section mark same tag omit explanation, different portions is elaborated.

The coil unit 56 that constitutes magnetic field generation device 60 has coil unit 56a, the 56b of two sections of on as axial above-below direction configurations, in this, is different from above-mentioned embodiment.

Promptly; Specifically; Last coil 58a, the 58b of having reeled of substantially same structure, that be disposed at top and the bottom respectively

bobbin

57a, 57b, configuration yoke 61 in the top of the coil 58a of epimere side therein is in the lower side configuration yoke 63 of the coil 58b of hypomere side.

At this, between axial each coil 58a and 58b of axle 24, promptly between the upper side of the coil 58b of the lower side of the coil 58a of epimere side and hypomere side, disposed the yoke 62 of pars intermedia.

The yoke 62 of pars intermedia that the coil unit 56a of top and the bottom side, 56b are shared.

In addition; Coil 58a and 58b are connected in series; And, the hollow bulb of

yoke

61,62,63 cylindraceous and the outer peripheral face of axle 24 between have narrow and small gap, be communicated with the gap that forms by

bobbin

57a, 57b; Thereby formed the upwardly extending clearance G cylindraceous of upper and lower (below, each gap is also marked mark G describe).

The coil unit 56a of this structure, 56b are respectively under the state of these top and the bottom and pars intermedia

configuration yoke

61,62,63; For example, utilize thermoplastic resin (nylon, PBT; PET; PP etc.) carry out resin forming (among the figure, resin forming portion 59 being shown) and constitute an integral body, constitute the magnetic field generation device 60 of this embodiment.

Therefore, the upper and lower end parts through the clearance G that forms with 34,35 pairs of these magnetic field generation devices of seal member 60 respectively seals, and thus, forms resettlement section 64 cylindraceous, resettlement section 64 in, fills and inclosure magneto-rheological fluid 36.

In said structure, along with coil 58a, 58b energising to top and the bottom, the magnetic field of around each coil 58a, 58b, flowing produces magnetic loop D1, D2 shown in dotted arrow.For example, the magnetic loop D1 that produces in the coil 58a of epimere side side forms the path of yoke 62 → resettlement section 64 (clearance G) → axle 24 of yoke 61 → cylinder body 22 → pars intermedia on axle 24 → resettlement section 64 (clearance G) → top.

On the other hand, the path of yoke 62 → resettlement section 64 (the clearance G) → axle 24 of yoke 63 → cylinder body 22 → pars intermedia of the magnetic loop D2 of the coil 58b side of hypomere side formation axle 24 → resettlement section 6 (clearance G) → bottom.

Therefore, when dehydrating operation etc., to the vibration of tank 6, through the rubbing action based on the viscosity of axle 24 and magneto-rheological fluid 36, performance vibration attenuation effect etc. can be expected the damping identical with above-mentioned embodiment.

In addition, in this embodiment, be provided with coil 58a, 58b at two sections; Therefore, according to magnetic loop D1, D2, and each

yoke

61,62,63 and axle totally 4 positions that the position is suitable between 24; Can adjust the viscosity change of magneto-rheological fluid 36; Its adjusting range broad, control range also can be bigger, can obtain desirable damping force easily as damping mechanism 30.

On the other hand, when being filled into magneto-rheological fluid 36 in the resettlement section 64, identical with above-mentioned embodiment basically.That is, be, on the seal member 34 and the structure before the parts of bearings 31 on assembling top, cylinder body 22 remained on the state that erects on the above-below direction, can inject from the clearance G side of the yoke 61 on the top that upper face side exposes as the structure of suspension 7.

At this, in this embodiment, as coil 58a, the 58b of two sections configurations, resettlement section 64 also becomes the cylindric of lengthwise, therefore requires to flow into smoothly the magneto-rheological fluid 36 that is injected.Therefore, same with above-mentioned first embodiment in this embodiment, be provided with the fluid passage of the groove shape of a plurality of (for example, 2) that are used for being communicated with clearance G in each

yoke

61,62,63.

Specifically, same with above-mentioned first embodiment, can be as the sectional area that injection portion uses big fluid passage 65,66,67 promptly, is located at the same position of circumferencial direction respectively in each

yoke

61,62,63 assortment in a straight line.The little fluid passage 68,69,70 of the sectional area that is mainly used in extracting air that in addition, will be positioned at its opposition side is arranged to like above-mentioned same configuration structure.

Therefore, in this embodiment,

coil unit

56a, 56b be configured to two sections damping mechanism 30; Its axial above-below direction is longer, and resettlement section 64 is also longer, can be through the fluid passage 65,66,67 of identical configuration in a circumferential direction; Flow into inboard (lower side) to magneto-rheological fluid 36 fast; In addition, can discharge inner air fast to the outside, therefore can efficiently inject operation from other fluid passages 68,69,70.

And, shown in figure 10 in this embodiment, through using the long injector 71 of needle point, can further efficiently inject.This Figure 10 is the structure of having removed before the what is called assembling of seal member 34 and parts of bearings 31 on top, can inject magneto-rheological fluid 36 from the top of the yoke 61 of top opening.

This injection operation is specified; For example arrange in a straight line with the injection portion side fluid passage that sectional area is big accordingly 65,66,67; Therefore, prepare injector 71, this injector 71 possesses can pass through the long needle point 71a that this each fluid passage 65,66,67 inserts.

At this moment, needle point 71a is crooked halfway and extend to the foreign side of cylinder body 22, thereby avoids in use the position of injector 71 to disturb with axle 24.

After the position of the yoke 63 that above cylinder body 22, is inserted into needle point 71a the bottom, the action bars 71b of injector 71 is carried out pressing operation extrude magneto-rheological fluid 36, begin the resettlement section 64 of lengthwise is filled from lower area.In addition, be main with the little fluid passage 68,69,70 of sectional area of the opposite location of injecting side, can be discharged to the top to the air of inside, carry out the inflow of magneto-rheological fluid 36 smoothly and move.

At this moment; Many parts of magneto-rheological fluids 36 of filling resettlement section 64 aequums are housed in injector 71; Utilize not shown press device that action bars 71b is carried out mechanical pressing operation; Through push injector 71 at control rate with in the time, can be filled into the magneto-rheological fluid 36 of necessary amount in the resettlement section 64 thus.

In addition,, be located at the upper end of the fluid passage 65 (top yoke 61) on top when closing to an end, then can further fill smoothly if be designed to draw needle point 71a gradually along with the carrying out of injecting operation.

In addition; Same with above-mentioned embodiment; Can be from the fluid passage 68 and the visual magneto-rheological fluid 36 of filling and rising that in resettlement section 64, injects of clearance G of the yoke 61 of topmost; Carry out in the time of the situation of can Visual Confirmation overflowing from clearance G etc. and inject operation, therefore, reliably visual identification reaches the situation of the occupied state of regulation.

According to aforesaid second embodiment, be provided with and possess the coil 58a of two-stage structure, the magnetic field generation device 60 of 58b, be improved to the damping of the attenuation of the vibration of tank 6.

Therefore, the resettlement section 64 that is used to accommodate magneto-rheological fluid 36 also becomes elongate shape, and it is big that volume also becomes; But, for example can inject state by Visual Confirmation, and can discharge air well; Therefore operating efficiency etc. can be obtained efficiently, the action effect identical can be expected with first embodiment.

In addition; Especially in this embodiment, utilize injector 71 with long needle point 71a, can begin to inject magneto-rheological fluid 36 from the needle point 71a of the lower area that is inserted into resettlement section 64; Therefore; The inner air in resettlement section 64 also are expressed into top and efficient the discharge, and magneto-rheological fluid 36 also can reliably be filled in the resettlement section 64 etc., further efficiently enforcement injection operation.

In addition; When reaching the state that in resettlement section 64, fills up magneto-rheological fluid 36, expose from the fluid passage 68 or the clearance G of the yoke 61 on top on the surface of magneto-rheological fluid 36, and the user can visual easily this state; Therefore; Can confirm to inject (fillings) state and come suitably to add and subtract injection rate, perhaps when operation, can not produce excessive or foot phenomenon not, can efficiently inject operation.

In addition; In above-mentioned embodiment, the tumbling-box washing machine that is applied to possess around the cylinder of transverse axis is illustrated, but is not limited thereto; For example; Can also be applied to following so-called longitudinal axis type washing machine, this longitudinal axis type washing machine has the sink that is also used as drench pit that can rotate around the longitudinal axis, and on the longitudinal axis, possesses the tubular at end tank is arranged.

In addition, though make at tank side connecting axle, and the structure of in cylinder apparatus, move up and down (reciprocating motion); But be not limited thereto; For example, can make a cylinder body side and be installed to the tank side, be installed to axle (helical spring) side the joint construction of framework bottom.

At this moment, the cylinder body side responds tank and directly moves back and forth, but axle is the structure that moves back and forth with respect to cylinder body, can expect identical with above-mentioned embodiment in fact action effect.

In addition, through in injector, accommodating the magneto-rheological fluid of the amount that can roughly fill up resettlement section 1 time in advance, and all inject this magneto-rheological fluid, can inject ormal weight to the resettlement section thus, manageable injection rate.At this moment, because the reliable ormal weight that injects, so need not to be injected into the degree that magneto-rheological fluid exposes.

But, in this case, also can be set at the magneto-rheological fluid that is filled in the resettlement section and the amount that can expose such as overflow, and through visual this situation of discerning from the clearance G of yoke, can access through visual and confirm the action effect that can reliably fill.

And, constituting on the yoke of magnetic field generation device, be provided with the long-pending different a plurality of fluid passages of passage sections, but as long as according to yoke from the size of the structure of body and resettlement section or shape wait establish when setting fluid passage just passable.In addition, the coil that is used to produce magnetic field also can be more than the two-stage structure, and the insertion depth of the pin of the injector of this moment also can be set according to the size of coil, and, can implement by above-mentioned each embodiment of appropriate combination.

More than, though several embodiments of the present invention is illustrated, these embodiments are just pointed out as example, are not intended to limit scope of invention.These new embodiments can variety of way otherwise be implemented, and in the scope of the purport that does not break away from invention, can carry out various omissions, displacement and change.These embodiments and distortion thereof are included in scope of invention and the purport, and are included in the invention of putting down in writing in the scope of claim and in the scope that is equal to.

Claims

1. a washing machine in the framework that forms shell, carries out the vibrationproof support by suspension to tank, is provided with the sink that can rotate in this tank, it is characterized in that,

Above-mentioned suspension is connecting on the above-below direction and is being assembled between above-mentioned framework and the above-mentioned tank by damping mechanism,

Above-mentioned damping mechanism possesses:

The cylinder body of tubular;

Parts of bearings is in being assembled into this cylinder body;

Axle is inserted and is led between the above-mentioned parts of bearings, and an end extends to outside the above-mentioned cylinder body, and moves back and forth according to the vibration of above-mentioned tank;

Magnetic field generation device is provided in the above-mentioned cylinder body with the mode that around this, forms the gap;

Seal member, it is assembled into, seal this magnetic field generation device above-mentioned gap two outboard end and form the resettlement section of hollow; And

Magneto-rheological fluid is filled into above-mentioned resettlement section, and viscosity changes when being applied in magnetic field through above-mentioned magnetic field generation device,

Above-mentioned magnetic field generation device possesses:

Coil unit, the coil that produces magnetic field reeled to be installed on the bobbin and to form; And

Yoke is provided in the both sides of this coil unit,

Form fluid passage at least one side yoke in above-mentioned yoke, this fluid passage is communicated to and is located at and the above-mentioned gap between above-mentioned,

With above-mentioned fluid passage as the injection portion of filling magneto-rheological fluid to above-mentioned resettlement section.

2. washing machine according to claim 1 is characterized in that,

Above-mentioned fluid passage is the fluid passage along the axially extended groove shape of above-mentioned axle.

3. washing machine according to claim 2 is characterized in that,

A plurality of above-mentioned fluid passages are set, with wherein at least one fluid passage as injection portion, and with the axial cross section of this fluid passage long-pending form bigger than the sectional area of other above-mentioned fluid passages.

4. according to claim 2 or 3 described washing machines, it is characterized in that,

Above-mentioned fluid passage also is arranged on the opposite side yoke in the above-mentioned yoke.

5. washing machine according to claim 4 is characterized in that,

The above-mentioned fluid passage of each yoke is located at the same position on the circumferencial direction.

6. washing machine according to claim 1 is characterized in that,

Seal above-mentioned yoke the gap outboard end and form the above-mentioned seal member of above-mentioned resettlement section, thereby the interior all side end butts that constitute with above-mentioned yoke seal.

7. washing machine according to claim 1 is characterized in that,

Injecting an above-mentioned side yoke of above-mentioned magneto-rheological fluid side, and above-mentioned axle between the bight of interior all side ends in the above-mentioned gap that forms, make the plane chamfered section or the chamfered section of dome shape.

8. washing machine according to claim 1 is characterized in that,

Inject an above-mentioned side yoke of above-mentioned magneto-rheological fluid side, be positioned at the upper side that is assembled into the above-mentioned suspension between above-mentioned framework and above-mentioned tank.

9. the damping mechanism assemble method of the suspension of a washing machine, this washing machine carries out the vibrationproof support by suspension to tank in the framework that forms shell, be provided with the sink that can rotate in this tank, and this damping mechanism assemble method is characterised in that,

Above-mentioned damping mechanism possesses:

The cylinder body of tubular;

Parts of bearings is in being assembled into this cylinder body;

Axle is inserted and is led between above-mentioned parts of bearings, and an end extends to outside the above-mentioned cylinder body, and moves back and forth according to the vibration of above-mentioned tank;

Above-mentioned magnetic field generation device possesses:

Yoke is provided in the both sides of this coil unit,

Assembling under the state before being positioned at the above-mentioned seal member of a side and the above-mentioned parts of bearings that extend a side outside the above-mentioned axial cylinder body, above-mentioned magneto-rheological fluid can be injected into above-mentioned resettlement section from the above-mentioned gap that is exposed between an outside above-mentioned side yoke and the axle.