JP5489351B2 - Washing machine - Google Patents

Description

  Embodiments described herein relate generally to a washing machine.

  Some washing machines, for example, drum type washing machines, include a damper for elastically supporting the water tank. Further, there is a configuration in which a coil is provided inside the damper, and a lead wire connected to the coil is led out from the damper (for example, Patent Document 1).

  By the way, when the lead wire is led out from the damper or the lead wire is introduced into the damper, if the damper rotates around the center axis of the damper due to vibration of the water tank during washing, the lead wire is kinked. There is.

JP 2006-75465 A

  Accordingly, a washing machine is provided that prevents the lead wire led out from the damper from being kinked.

The washing machine of the present embodiment is a washing machine in which a water tub is elastically supported by a damper having a vibration absorbing function in a washing machine casing, and the damper is provided with a cylinder and the cylinder so as to be movable in the axial direction. A shaft whose one end passes through the cylinder and protrudes to the outside, a functional fluid whose viscosity is changed by filling a predetermined portion between the cylinder and the shaft and being supplied with electric energy, and penetrating the cylinder And a lead wire for power feeding for supplying electric energy to the functional fluid led to the outside of the cylinder, and one end of the shaft of the damper is connected to the water tank. A configuration in which an end opposite to one end of the shaft is connected to an attachment fixed to the washing machine casing via a receiving member made of rubber; Further prevented from rotating the receiving member relative to said end portion by fitting between said receiving member and said end of said cylinder in the axial direction around the cylinder, and, said attachment portion and the receiving member This is characterized in that the receiving member is configured to be prevented from rotating with respect to the mounting portion in the direction around the axis of the cylinder.

Longitudinal side view of the suspension of the drum type washing machine according to the first embodiment Exploded perspective view of a damper mounting portion for showing a damper detent configuration Longitudinal cross section of coil assembly Perspective view of coil assembly Plan view of second yoke Side view of coil assembly Partial longitudinal cross-sectional view of a portion from which a lead wire is led out in a coil assembly Partial longitudinal cross-sectional view of a portion from which a lead wire is led out in a state where the coil assembly is accommodated in the cylinder Side view of partially broken suspension to show lead wire wiring Top view of fastening band Longitudinal side view of drum-type washing machine Front view of suspension and water tank FIG. 12 equivalent diagram showing the second embodiment

Hereinafter, the washing machine according to the first embodiment will be described with reference to FIGS. 1 to 12.
First, FIG. 11 shows an overall structure of a drum type washing machine as a washing machine. A laundry doorway 2 is formed at a substantially central portion of the front surface (right side in FIG. 11) of the washing machine housing 1 and a door 3 for opening and closing the doorway 2 is provided. An operation panel 4 is provided at the upper part of the front surface of the washing machine casing 1, and a control device 5 for operation control is provided on the back side (in the washing machine casing 1).

A water tank 6 is disposed inside the washing machine casing 1. This water tank 6 has a horizontal cylindrical shape whose front and rear (right and left in FIG. 11) are in the axial direction. It is elastically supported with a rising slope. The detailed structure of the suspension 7 will be described later.
A motor 8 is attached to the back of the water tank 6. In this case, the motor 8 is composed of, for example, a direct current brushless motor, and is an outer rotor type. A rotating shaft (not shown) attached to the center portion of the rotor 8 a is connected to the inside of the water tank 6 via the bearing bracket 9. Is inserted.

  A drum 10 is disposed inside the water tank 6. This drum 10 also has a horizontal cylindrical shape with the front and rear being axially attached. By attaching it to the tip of the rotating shaft of the motor 8 at the center of the rear part, the drum 10 has a forwardly inclined shape coaxial with the water tank 6. I support it. As a result, the drum 10 is rotated by the motor 8, so that the drum 10 is a rotating tub and the motor 8 functions as a drum driving device that rotates the drum 10.

  A large number of small holes 11 (only a part is shown) are formed in the peripheral side portion (body portion) of the drum 10 over the entire area. Each of the drum 10 and the water tub 6 has openings 12 and 13 on the front surface thereof, and the laundry entrance 2 is connected to the opening 13 of the water tub 6 through an annular bellows 14. . As a result, the laundry entrance / exit 2 is connected to the inside of the drum 10 via the bellows 14, the opening 13 of the water tub 6, and the opening 12 of the drum 10.

  A drain pipe 16 is connected to the rear part of the bottom, which is the lowest part of the water tank 6, via a drain valve 15. A drying device 17 is disposed above and in front of the back of the water tank 6. This drying device 17 has a dehumidifier 18, a blower 19, and a heater 20, and dehumidifies the air in the water tank 6, and then heats the air to return it to the water tank 6. The laundry is to be dried.

Here, the detailed structure of the suspension 7 will be described. As shown in FIG. 1, the suspension 7 includes a damper 21, and the damper 21 includes a cylinder 22 and a shaft 23 as main members. Among these, the cylinder 22 has a connecting member 24 (also shown in FIG. 2) at its lower end, and this connecting member 24 is attached to an attachment plate 28 (attachment portion) fixed to the bottom plate 1a of the washing machine casing 1. It is attached as described later.
Further, the shaft 23 has a connecting portion 23a at its upper end, and the connecting portion 23a is passed through the mounting plate 25 of the water tank 6 from below to the elastic seat plate 26 as shown in FIGS. It attaches to the water tank 6 by fastening with the nut 27 via etc.

  As shown in FIG. 1, a spring receiving seat 31 is fitted and fixed to the upper portion of the shaft 23 located on the upper outside of the cylinder 22, and between the spring receiving seat 31 and the upper end portion of the cylinder 22. Is equipped with a coil spring 32 comprising a compression coil spring surrounding the shaft 23. In the coil spring 32, the diameter dimension of the middle part is slightly increased with respect to the diameter dimension of the upper and lower parts so that the coil spring 32 itself is not easily buckled.

  An annular lower bracket 33 is accommodated in an intermediate portion inside the cylinder 22, and a groove 33 a is formed in the outer peripheral portion of the lower bracket 33, and the groove 33 a in the peripheral wall portion of the cylinder 22 is formed in the groove 33 a. The lower bracket 33 is fixed to the cylinder 22 by caulking the corresponding part inward. A bearing 34 a that supports the shaft 23 so as to be movable in the vertical direction is housed and fixed to the inner peripheral portion of the lower bracket 33. The bearing 34a is made of, for example, sintered oil-impregnated metal.

  An annular upper bracket 35 is accommodated in the upper end portion inside the cylinder 22, and a groove 35 a is formed in the outer peripheral portion of the upper bracket 35, and the groove 35 a in the peripheral wall portion of the cylinder 22 is formed in the groove 35 a. The upper bracket 35 is fixed by caulking the corresponding part inward. A bearing 34b that supports the shaft 23 so as to be movable in the vertical direction is housed and fixed to the inner peripheral portion of the upper bracket 35. The bearing 34b is made of, for example, sintered oil-impregnated metal. Note that the cylindrical portion 35 b protruding upward from the upper surface portion of the upper bracket 35 in FIG. 1 protrudes upward through an opening formed in the upper end surface portion of the cylinder 22.

A friction ring 36 is disposed and fixed on the inner surface of the cylindrical portion 35b. The friction ring 36 is made of polyurethane and applies a frictional force to the vertical movement of the shaft 23.
A coil assembly 37 is accommodated in a portion between the lower bracket 33 and the upper bracket 35 inside the cylinder 22, and the coil assembly 37 is sandwiched and fixed between the lower bracket 33 and the upper bracket 35. Yes. The coil assembly 37 is formed with a through hole 38 through which the shaft 23 is inserted and movable in the vertical direction. The detailed structure of the coil assembly 37 will be described with reference to FIGS.

  As shown in FIG. 3, the coil assembly 37 includes a first yoke 39, a first bobbin 41 around which the first coil 40 is wound, a second yoke 42, and a second coil 43. A second bobbin 44 and a third yoke 45 are provided. The coils 40 and 43, the bobbins 41 and 44, and the yokes 39, 42, and 45 are integrally formed with a resin 46 (see FIGS. 3 and 4).

  Here, on the upper and lower end plates 47, 47 in FIG. 3 of the first bobbin 41, for example, four projections 47a (engagement portions) for positioning project outwardly at approximately equal intervals, for example. Has been. Similarly, on the end plates 47 and 47 of the second bobbin 44, four convex portions 47a (engaging portions) for positioning protrude outwardly at substantially equal intervals.

  A concave portion 48 (engaged portion) into which the convex portion 47a of the end plate 47 is fitted (engaged) is formed on the end surface of the first yoke 39 facing the end plate 47 of the first bobbin 41. Is formed. An annular recess 49 is formed on the lower end surface of the first yoke 39 in FIG. 3, and the seal member 50 is press-fitted and fixed in the annular recess 49. The seal member 50 protrudes from the end surface of the first yoke 39, and the protruding portion of the seal member 50 is in an annular recess 51 (see FIG. 1) formed on the upper surface of the lower bracket 33 in FIG. It is configured to be accommodated in.

  In the second yoke 42, four through holes 52 (engaged portions) are formed so as to open on the end surfaces on both the upper and lower sides (see FIGS. 3 and 5). The projection 47a of the end plate 47 of the bobbin 41 and the projection 47a of the end plate 47 of the second bobbin 44 are configured to be fitted (engaged).

  Further, a concave portion 48 (engaged) in which the convex portion 47a of the end plate 47 is fitted (engaged) with the lower end surface of the third yoke 45 facing the end plate 47 of the second bobbin 44. Part) is formed. An annular recess 53 is formed on the upper end surface of the third yoke 45 in FIG. 3, and a seal member 54 is press-fitted and fixed in the annular recess 53. The seal member 54 protrudes from the upper end surface of the third yoke 45, and the protruding portion of the seal member 54 is an annular recess 55 (see FIG. 1) formed on the lower surface of the upper bracket 35 in FIG. It is configured to be accommodated in.

  In the case of the above configuration, as shown in FIG. 3, the convex portion 47 a of the end plate 47 of the first bobbin 41 is fitted into the concave portion 48 of the first yoke 39 and the upper end surface of the first yoke 39 is fitted to the upper end surface. An annular convex portion 47b protruding from the inner peripheral portion of the end plate 47 of one bobbin 41 is brought into contact. Then, the convex portions 47 a of the end plates 47 of the first bobbin 41 and the second bobbin 44 are fitted into the through holes 52 of the second yoke 42, and the second yoke 42 has first and second end faces on the upper and lower end surfaces. Annular convex portions 47b protruding from the inner peripheral portions of the end plates 47 of the first bobbin 41 and the second bobbin 44 are brought into contact with each other. Further, the convex portion 47 a of the end plate 47 of the second bobbin 44 is fitted into the concave portion 48 of the third yoke 45, and the end plate 47 of the second bobbin 44 is fitted to the lower end surface of the third yoke 45. An annular convex portion 47b protruding from the inner peripheral portion of the inner surface is brought into contact.

  Thereafter, the yokes 39, 42, 45 and the bobbins (coils 40, 43) 41, 44 assembled as described above are accommodated in a mold (not shown) and integrally molded (molded) with the resin 46. As the resin 46, for example, a thermoplastic resin (nylon, PBT, PET, PP, or the like) is used. In this case, as shown in FIG. 3, the resin 46 covers the outer peripheral portions of the coils 40, 43 and the bobbins 41, 44, and covers substantially the upper half of the outer peripheral portion of the first yoke 39 in the axial direction. 3 of the outer periphery of the three yokes 45 is covered with about the lower half in the axial direction.

  The resin 46 is filled in a ring-shaped groove 39 a formed on the outer periphery of the first yoke 39, and between the end surface of the first yoke 39 and the end plate 47 of the first bobbin 41. The gap is also filled. Then, the resin 46 is filled in, for example, four grooves 42a (see FIG. 5) formed in the axial direction at substantially equal intervals on the outer peripheral portion of the second yoke 42, and the end surface of the second yoke 42 and the first surface The gap between the end plate 47 of the bobbin 41 and the gap between the end surface of the second yoke 42 and the end plate 47 of the second bobbin 44 are also filled. Of the four grooves 42a of the second yoke 42, the groove 42a located in the lower part in FIG. 5 is formed wider and wider than the other three grooves 42a. Further, the resin 46 is filled in a ring-shaped groove 45 a formed on the outer peripheral portion of the third yoke 45, and a gap between the end surface of the third yoke 45 and the end plate 47 of the second bobbin 44. Also filled.

  Here, the inner diameter dimension of the through hole 38 (hole into which the shaft 23 is inserted) of the resin-molded coil assembly 37 as described above will be described. The inner diameters of the three yokes 39, 42, 45 are set to the same dimension, and a gap of, for example, about 0.4 mm is formed between the outer periphery of the shaft 23. The inner diameters of the two bobbins 41 and 44 are set to the same size and slightly larger than the inner diameters of the three yokes 39, 42, and 45. For example, a gap of about 1.0 mm is formed.

  Further, as shown in FIG. 8, a through hole is formed in the center of the lower large groove 42a in FIG. 5 in the second yoke 42 so as to communicate the inner peripheral portion and the outer peripheral portion of the second yoke 42. 42b is formed. A pipe 55 having a thread portion formed on the outer periphery is fastened and fixed in the through hole 42b. This pipe 55 is a member for filling and injecting a magnetorheological fluid described later.

  The two coils 40 and 43 are connected in series, and a lead wire 56 for feeding a pair of two single wires 56a is connected to both terminals thereof. Power is supplied to 40 and 43 to generate a magnetic field as electric energy. As shown in FIG. 4, the lead wire 56 is led out from the large groove 42a portion of the second yoke 42 in FIG. 5 of the resin mold (molded) portion.

  In this case, as shown in FIG. 7, a rubber or resin support part 57 for supporting the lead wire 56 is disposed in the large groove 42 a of the second yoke 42 and is molded with the resin 46. . A T-shaped support hole 57a is formed in the support component 57, and the lead wire 56 is accommodated in the support hole 57a. The support component 57 is divided into two along the support hole 57a in order to accommodate the lead wire 56 in the support hole 57a. The lead wire 56 is guided from the coils 40 and 43 into the support hole 57a of the support component 57 through guide grooves (not shown) formed in the end plates 47 and 47 of the bobbins 41 and 44.

Also, as shown in FIGS. 4 and 8, a substantially circular recess 58 is formed in a portion corresponding to the through hole 42b (groove 42a) of the second yoke 42 in the mold portion of the resin 46. An accommodation groove 59 for accommodating the lead wire 56 is formed so as to extend downward from the recess 58. A housing groove 39 b (see FIG. 4) for housing the lead wire 56 is formed in a portion corresponding to the housing groove 59 in the outer peripheral portion of the first yoke 39.
A through hole 60 (see FIG. 8) is formed in the cylinder 22 corresponding to the recess 58. The through-hole 60 is a hole for leading (penetrating) the lead wire 56 to the outside, as will be apparent from a later description.

  Next, the operation of housing the coil assembly 37 molded with resin as described above into the cylinder 22 will be described. In this case, as shown in FIG. 1, the upper bracket 35 to which the bearing 34b is mounted is previously moved down into the cylinder 22 in a state before caulking and before the coupling member 24 is fixed (the bottom surface of the cylinder 22 is opened). The upper bracket 35 is fixed in the cylinder 22 by caulking inwardly a portion corresponding to the groove 35a of the upper bracket 35 in the peripheral wall portion of the cylinder 22 (see FIG. 1). Indicates a caulked state).

  As for the coil assembly 37, as shown in FIGS. 4, 5, 6 and 7, the lead wire 56 led out from the resin mold portion (support component 57) is connected to the recess 58, the accommodation groove 59 and the accommodation groove. The lead wire 56 is accommodated in 39 b so that it does not protrude from the outer peripheral surface of the coil assembly 37.

  And the coil assembly 37 which processed the lead wire 56 as mentioned above is accommodated in the cylinder 22 from the downward direction. At this time, the coil assembly 37 is accommodated in the cylinder 22 by aligning the recess 58 of the coil assembly 37 with the through hole 60 (see FIG. 8) formed in the peripheral wall portion of the cylinder 22 so as to coincide with each other. To do. Subsequently, the lead wire 56 is hooked and pulled out from the through hole 60 of the cylinder 22 with a tool (not shown), for example, and the lead wire 56 is led out of the cylinder 22 through the through hole 60. Further, as shown in FIG. 8, after the lead wire 56 is passed through the hole of the rubber or resin bush 61 from its tip, the bush 61 is fitted and fixed to the through hole 60 of the cylinder 22. The lead wire 56 led out from the bush 61 is then connected to the connector 56b at the tip.

  Next, as shown in FIG. 1, after the lower bracket 33 fitted with the bearing 34 a is accommodated in the cylinder 22 from below, the portion of the peripheral wall portion of the cylinder 22 corresponding to the groove 33 a of the lower bracket 33 is set inside. The lower bracket 33 is fixed in the cylinder 22 by caulking in the direction (see FIG. 1).

  Thereafter, the shaft 23 before the spring seat 31 is attached is inserted into the cylinder 22 from below, and the opening of the lower bracket 33, the bearing 34a, the seal member 50, the first yoke 39, the first bobbin 41 ( The first coil 40), the second yoke 42, the second bobbin 44 (second coil 43), the third yoke 45, the seal member 54, the bearing 34b, the friction ring 36, and the upper bracket 35 have openings. It penetrates in order and protrudes above the cylinder 22.

  In this state, the shaft 23 is supported by the bearings 34a and 34b, the bearing 34a, the seal member 50, the first yoke 39, the first bobbin 41 (first coil 40), and the second yoke 42. The second bobbin 44 (second coil 43), the third yoke 45, the seal member 54, and the bearing 34b are relatively reciprocally movable in the axial direction. Note that a retaining ring 62 for retaining is attached to the upper end portion of the shaft 23, and a hollow 63 is formed inside the cylinder 22 below the retaining ring 62.

  Thereafter, the spring receiving seat 31 is fitted and fixed to the upper portion of the shaft 23, and further, the compression coil spring surrounding the shaft 23 is interposed between the spring receiving seat 31 and the upper end portion of the cylinder 22. A coil spring 32 is mounted.

  Further, between each of the shaft 23 and the bobbins 41 and 44 (coils 40 and 43) and between each of the shaft 23 and the yokes 39, 42 and 45 in the vicinity thereof (a predetermined portion between the cylinder 22 and the shaft 23). ) Is filled with a functional fluid such as a magnetorheological fluid 64 (see FIGS. 1 and 3). The magnetorheological fluid 64 is sealed by the seal members 50 and 54 so as not to leak.

The functional fluid is a fluid in which rheological properties such as viscosity are functionally changed by controlling a physical quantity applied from the outside, and a magnetic viscous fluid 54 and a fluid whose viscosity changes by application of electrical energy. An electrorheological fluid (not shown) is included. In this embodiment, the magnetorheological fluid 54 whose viscosity characteristics change according to the strength of the magnetic field (magnetic field) as electric energy is used. However, the electrorheological fluid whose viscosity properties change according to the strength of the electric field (electric field). (ER fluid) may be used. The magnetorheological fluid 54 is, for example, a material in which ferromagnetic particles such as iron and carbonyl iron are dispersed in oil, and when a magnetic field is applied, the ferromagnetic particles form a chain-like cluster. The viscosity increases. The damper 21 using these functional fluids is necessarily provided with the above-described lead wire 56 for applying current and voltage.
Further, the closing plate portion 24 a of the connecting member 24 is fixed integrally to the cylinder 22 at the lower end opening of the cylinder 22. This fixing method may be fixing by press-fitting or fixing by caulking.

When injecting the magnetorheological fluid 64 between the above, a tube (not shown) is connected to the pipe 55 with the bush 61 shown in FIG. 8 removed from the through hole 60 in the peripheral wall portion of the cylinder 22. After exhausting (evacuating) the air in the spaces through the tube, the magnetorheological fluid 64 is injected into the spaces through the tube. After the injection of the magnetorheological fluid 64, the opening of the pipe 55 is sealed with a seal member (not shown) or the like, and then the bush 61 is attached to the through hole 60 of the cylinder 22.
The suspension 7 configured as described above is assembled between the water tub 6 and the bottom plate 1a of the washing machine casing 1 so that the water tub 6 is supported on the bottom plate 21a of the outer box 21 by vibration isolation. Yes.

  The cylinder 22 in the suspension 7 thus configured is connected to the mounting plate 28 so as to be prevented from rotating with respect to the mounting plate 28 fixed to the bottom plate 1 a of the washing machine casing 1. The structure for preventing the rotation will be described with reference to FIGS. That is, the connecting member 24 projects the mounting shaft portion 24b downward from the central portion of the closing plate portion 24a that closes the lower surface opening of the cylinder 22, and a female screw portion 24c is formed at the tip of the mounting shaft portion 24b. Is formed.

  Further, in the connecting member 24, a cylinder-side convex portion 65 is formed on the lower end surface (end surface of the cylinder) of the closing plate portion 24 a so as to protrude in the axial direction concentrically with the axis of the cylinder 22. The cylinder-side convex portion 65 has, for example, a hexagonal outer shape, and the cylinder-side convex portion 65 has a plurality of, in this case, six straight portions 65a on the outer surface.

  Further, the washer 66 has a substantially donut plate shape, its inner shape is a hexagonal shape that substantially matches the hexagonal shape inside the cylinder-side convex portion 65, and its outer shape is also a hexagonal shape. As a result, the washer 66 has an inner straight portion 66a corresponding to the straight portion 65a of the cylinder-side convex portion 65 on the inner surface, and a plurality of outer straight portions 66b in this case, six in this case.

  Further, the rubber receiving member 67 that elastically receives the suspension 7 is formed with an insertion hole portion 67a through which the connecting member 24 is inserted, and the receiving member side concave portion 67b having a hexagonal planar shape. Is formed. Since the planar shape of the receiving member side recess 67b is hexagonal, the inner surface has a plurality of, in this case, six straight portions 67c corresponding to the outer straight portions 66b of the washer 66. Further, a receiving member side convex portion 67d protruding downward is formed at the lower portion of the receiving member 67, and the receiving member side convex portion 67d has a quadrangular outer plane shape. The convex portion 67d has four straight portions 67e on the outer surface thereof.

  Furthermore, the mounting plate 28 has a square-shaped anti-rotation hole 28a whose plane shape substantially coincides with the receiving member-side convex portion 67d, and the anti-rotation hole 28a has the rectangular shape. In this case, a plurality of, in this case, four straight portions 28b corresponding to the straight portions 67e of the receiving member side convex portions 67d are provided. Here, the anti-rotation hole 28a is formed in a substantially rectangular tube shape from a burring protruding downward.

  The rubber abutting member 68 is formed with an insertion hole 68a through which the mounting shaft 24b of the connecting member 24 is inserted, and the upper surface is scratched by the lower end of the anti-rotation hole 28a, that is, the lower end of the burring. An escape recess 68b is formed to prevent this. A recess 68c having the same size is also formed on the lower surface of the abutting member 68, and can be mounted upside down.

  The procedure for attaching the connecting member 24, which is the lower part of the cylinder 22, to the mounting plate 28 will be described. The inner periphery of the washer 66 is connected to the outer periphery of the cylinder-side convex portion 65, and the linear portion 65 a of the cylinder-side convex portion 65. The receiving member 67 is fitted to the inner straight portion 66a of the washer 66 so that the insertion hole portion 67a of the receiving member 67 is fitted to the mounting shaft portion 24b, and the receiving member 67 is fitted to the outer straight portion 66b of the washer 66. The receiving member side concave portion 67b is fitted so that the straight portion 67c matches. Then, the receiving member side convex portion 67d is fitted into the rotation preventing hole portion 28a so that the linear portion 67e of the receiving member side convex portion 67d matches the linear portion 28b of the rotation preventing hole portion 28a.

  Thereafter, the abutting member 68 and the abutting plate 69 are fitted to the mounting shaft portion 24b projecting downward from the mounting plate 28, and the nut 70 is screwed into the female screw portion 24c. Thereby, the lower part of the cylinder 22 is attached to the attachment plate 28.

  In this case, since the straight portion 65a of the cylinder-side convex portion 65 and the inner straight portion 66a of the washer 66 are matched in the fitting of the cylinder-side convex portion 65 of the connecting member 24 integral with the cylinder 22 and the washer 66, The cylinder-side convex portion 65 and the washer 66 of the connecting member 24 do not rotate around the axis of the cylinder 22. Furthermore, in the fitting between the washer 66 and the receiving member side recess 67b of the receiving member 67, the outer straight portion 66b of the washer 66 and the straight portion 67c of the receiving member side recess 67b of the receiving member 67 are matched, The washer 66 and the receiving member 67 also do not rotate out of rotation around the axis of the cylinder 22. Further, in the fitting of the receiving member side convex portion 67d and the rotation preventing hole portion 28a of the mounting plate 28, the linear portion 67e of the receiving member side convex portion 67d and the linear portion 28b of the rotation preventing hole portion 28a are matched. Therefore, the receiving member 67 also does not rotate around the axis of the cylinder 22 with respect to the mounting plate 28 that is integral with the washing machine casing 1 and is a non-rotating member.

  Accordingly, the receiving member 67 is prevented from rotating around the axis of the cylinder 22 with respect to the lower end portion of the cylinder 22, and the receiving member 67 is rotated around the axis of the cylinder 22 with respect to the mounting plate 28. It is configured to prevent rotation in the direction. Accordingly, the cylinder 22 is prevented from rotating with respect to the mounting plate 28.

  Further, the lead wire 56 led out from the cylinder 22 is connected to a connecting terminal 71 (see FIG. 12) at the tip thereof after the lead-out. Further, the lead wire 56 is fixed to the outer surface of the cylinder 22 in a stopped state by a fastening band 72 as a holder shown in FIGS. In addition, this fastening band 72 fixes the lead wire 56 to the outer surface of the cylinder 22 by crossing both ends thereof. As a holder, a binding band or the like may be used instead of the fastening band 72.

  As shown in FIG. 12, there are two suspensions 7 as described above, and they are provided so as to support the water tank 6 from the left and right. The lead wire 56 of the damper 21 of the right suspension 7 and the lead wire 56 of the damper 21 of the left suspension 7 are set to have substantially the same length.

  As shown in FIG. 12, a control device 73, which is a connection partner of the lead wires 56, 56, is provided at a position slightly to the right on the bottom plate 1 a of the washing machine casing 1. The lead wires 56 and 56 are connected to the control device 73 via length adjusting relay wires 74 and 75 having different lengths. The relay lines 74 and 75 are fixed to the washing machine casing 1 as appropriate.

The control device 73 incorporates a drive circuit that controls energization of the coils 40 and 43.
Now, the operation of the suspension 7 described above related to the washing operation will be described. First, consider a state where the coils 40 and 43 are not energized.

  As the drum 10 is rotationally driven in the washing process, the dehydration process, and the drying process, the water tank 6 vibrates mainly in the vertical direction. In response to the vertical vibration of the water tank 6, in the suspension 7, the shaft 23 moves up and down while the coil spring 32 extends and contracts with respect to the cylinder 22 fixed to the mounting plate 28. At this time, in addition to the vibration reducing action by the coil spring 32, the friction ring 36 always applies a damping force to the shaft 23 with a frictional resistance, and is filled between the shaft 23 and the yokes 39 and 42 and the coil 45. The magnetorheological fluid 64 causes a damping force to act on the frictional resistance due to the viscosity, and attenuates the amplitude of the water tank 6.

  Here, when the vibration of the water tank 6 is further increased, the coils 40 and 43 are energized, for example, when the rotation speed of the drum 10 is a resonance rotation speed (about 100 to 300 rpm). The energization condition is not limited to the rotation speed, and the energization may be performed when the vibration of the water tank 6 is detected by the vibration detecting means and the vibration becomes larger than the set value.

  When the coils 40 and 43 are energized based on the fact that the energization condition is satisfied, a magnetic field is applied to the magnetorheological fluid 64 and the viscosity of the magnetorheological fluid 64 increases. This greatly increases the frictional resistance. Thus, the damping force is increased by further increasing the frictional resistance with respect to the shaft 23 as compared with the case described above (when the coils 40 and 43 are not energized).

Therefore, the vibration of the water tank 6 can be effectively damped.
The coils 40 and 43 control the viscosity of the magnetorheological fluid 64 by generating a magnetic field according to the value of the flowing current, and the generated magnetic field is variable depending on the current value. Viscosity can be controlled variably.

  Now, when the vibration of the water tank 6 is generated, the rotational force may act continuously or intermittently in the direction around the axis of the suspension 7 depending on the vibration mode. In this case, there is a concern that the cylinder 22 rotates around its axis from the initial position (first assembly position), and there is a concern that the lead wire 56 may be twisted.

  However, according to the present embodiment, the receiving member 67 is prevented from rotating in the direction around the axis of the cylinder 22 with respect to the connecting member 24 which is the end of the cylinder 22 opposite to the upper end of the shaft 23. In addition, since the receiving member 67 is configured to be prevented from rotating around the axis of the cylinder 22 with respect to the mounting plate 28, the cylinder 22 can be reliably prevented from rotating in the direction around the axis, It is possible to reliably prevent the lead wire 56 from being twisted.

  Moreover, in this case, since the cylinder 22 of the suspension 7 is mounted on the mounting plate 28, the arrangement is different from the case where the coil spring 32 side of the suspension 7 is mounted on the mounting plate 28 contrary to the above. The lead wire 56 does not move up and down, and the wiring of the lead wire 56 is always in a stationary state, so that disconnection and deterioration can be avoided.

  In this case, the connecting member 24, which is the end opposite to the upper end of the shaft 23 in the cylinder 22, is connected to the mounting plate 28 fixed to the washing machine casing 1 via the receiving member 67 made of rubber. Therefore, the upper part of the cylinder 22 can swing freely in any direction (360-degree direction) with the lower part as the center, and the vibration of the water tank 6 in the front-rear and right-and-left directions (substantially horizontal directions) is also followed. This can be attenuated.

  Further, in the present embodiment, the connecting member 24 constituting the lower end portion of the cylinder 22 has a cylinder-side convex portion at its end surface that protrudes in the axial direction concentrically with the axis of the cylinder 22 and has a linear portion 65a on the outer surface. And a washer 66 having an inner straight portion 66a corresponding to the straight portion 65a of the cylinder-side convex portion 65 on the inner surface and an outer straight portion 66b on the outer surface. The member 67 is formed with a receiving member side recess 67b having a straight portion 67c corresponding to the outer straight portion 66b of the washer 66 on the inner surface, and the inner surface of the washer 66 is fitted on the outer surface of the cylinder side convex portion 65. In addition, the receiving member 67 is fitted to the outer surface of the washer 66 with the receiving member side recess 67b of the receiving member 67 so that the receiving member 67 is attached to the connecting member 24 of the cylinder 22. It was configured to stop Ri.

  According to this, by inserting the washer 66 between the connecting member 24 and the receiving member 67, the size of the receiving member side recess 67 b of the rubber receiving member 67 is increased according to the outer shape of the washer 66. (The distance from the shaft center to the torque application point can be increased), the rotation can be stopped with a small drag, and the service life of the receiving member 67 is not excessively stressed. Can do. That is, in the absence of the washer 66, the receiving member side recess 67b is matched to the outer diameter shape of the linder side convex portion 65 of the connecting member 24, and the size of the receiving member side recess 67b is reduced. The distance to the operating point of the rotational torque is reduced, and as a result, the drag required to prevent rotation is increased and the deterioration is accelerated, but this embodiment can prevent this.

  Further, in the present embodiment, the receiving member 67 includes a receiving member side convex portion 67d having a linear portion 67e on the outer surface at the lower portion thereof, and the mounting plate 28 has an inner surface of the receiving member side convex portion 67d. A rotation preventing hole portion 28a having a straight line portion 28b corresponding to the straight line portion 67e is provided, and the receiving member 67 is fitted to the rotation stopping hole portion 28a by fitting the receiving member side convex portion 67d of the receiving member 67 to the mounting member. The plate 28 was prevented from rotating. According to this, the receiving member 67 can be reliably prevented from rotating on the mounting plate 28.

  In addition, according to the present embodiment, the rotation preventing hole portion 28a of the mounting plate 28 is constituted by a burring protruding downward, so the receiving member side convex portion 67d of the receiving member 67 and the rotation preventing hole portion. The contact area with 28a is large, the receiving member 67 can be reliably prevented from being rotated, and the outer peripheral portion of the receiving member side convex portion 67d of the receiving member 67 is not damaged by the rotation preventing hole 28a.

  Further, in this embodiment, the cylinder-side convex portion 65 has a plurality of the straight portions 65a on the outer surface in this case, and the washer 66 has the same number of inner straight portions 66a as the straight portions 65a on the inner surface. A plurality of outer straight portions 66b in this case, and the receiving member-side recesses 67b of the receiving member 67 have the same number of straight portions 67c as the plurality of outer straight portions 66b. According to this, the rotational force around the shaft center is dispersed by the plurality of straight portions 65a and 66a, 66b and 67c, so that the cylinder 22 can be more reliably prevented from rotating.

  Further, according to the present embodiment, since the fastening band 72 as a holder for fixing the lead wire 56 is provided in the cylinder 22, the lead wire 56 is brought into a motion-stopped state in the cylinder 22 from which the lead wire 56 itself is led out. The lead wire 56 and the cylinder 22 are not displaced relative to each other, and disconnection or damage of the lead wire 56 can be further prevented.

  Further, according to the present embodiment, the bush 61 is fitted into the through hole 60 for allowing the lead wire 56 to pass through in the cylinder 22, and the lead wire 56 is passed through the hole portion of the bush 61. It is possible to prevent the wire 56 from being rubbed or excessively bent at the peripheral portion of the through hole 60 which is the outlet, and to prevent the lead wire 56 from being deteriorated.

  Further, in the present embodiment, there are two suspensions 7 provided with the damper 21 and they are provided apart from each other to support the left and right parts of the water tank 6, and the lead wires 56 and 56 are the same connection partner. The lead wires 56 and 56 of the dampers 21 are set to have substantially the same length. The lead wires 56 and 56 are connected to the control device 73 via length adjusting relay wires 74 and 75.

  According to this, even if the control device 73 is present at a location at a different distance from both the dampers 21, by using the length adjusting relay lines 74 and 75, each lead wire 56 of each damper 21, 56 can be set to the same length. As a result, the left and right dampers 21 and 21 (suspensions 7 and 7) can have the same configuration, and the manufacturing and assembly can be simplified.

  In this case, if the length of the lead wire 56 is set in advance so that the separation distance between the control device 73 and the damper 21 closer thereto can be secured, the damper 21 closer to the control device 73 The lead wire 56 may be directly connected to the control device 73, and the lead wire 56 of the other damper 21 may be connected to the control device 73 via a length adjusting relay line.

  In the present embodiment, the configuration in which the lead wire 56 is led out from a slightly upper part of the cylinder 22 (see FIGS. 1 and 12) is illustrated. However, as shown in FIG. Anyway. If it does in this way, the transition part from the damper 21 to the baseplate 1a of the washing machine housing | casing 1 can be shortened, and the stress concerning wiring can be reduced.

In addition, as embodiment of a washing machine, it is not restricted to a drum type washing machine, A so-called vertical washing machine provided with a rotating tub inside a vertical water tub and a stirring body in the rotating tub may be used.
Thus, according to the washing machine of embodiment mentioned above, it can prevent that the lead wire derived | led-out from the damper is twisted.

  In the drawings, 1 is a washing machine housing, 6 is a water tub, 10 is a drum, 7 is a suspension, 21 is a damper, 22 is a cylinder, 23 is a shaft, 24 is a connecting member, 24a is a closing plate portion, and 24b is a mounting shaft portion. , 28 is a mounting plate (mounting portion), 28a is a non-rotating hole portion, 28b is a straight portion, 36 is a friction ring, 40 is a first coil, 43 is a second coil, 56 is a lead wire, and 60 is a through hole. , 61 is a bush, 64 is a magnetorheological fluid (functional fluid), 65 is a cylinder side convex portion, 65a is a straight portion, 66 is a washer, 66a is an inner straight portion, 66b is an outer straight portion, 67 is a receiving member, 67b Is a receiving member side recess, 67c is a straight portion, 67d is a receiving member side convex portion, 67e is a straight portion, 68 is a contact member, and 72 is a fastening band.

Claims (9)

In the washing machine with a water tank elastically supported by a damper having a vibration absorbing function in the washing machine casing,
The damper is provided with a cylinder, a shaft that is movable in the axial direction within the cylinder, one end of which passes through the cylinder and protrudes to the outside, and a predetermined portion between the cylinder and the shaft is filled with electric energy. A functional fluid whose viscosity changes when applied, and a power supply lead wire that passes through the cylinder and is led out of the cylinder to give electric energy to the functional fluid;
In addition, one end of the shaft of the damper is connected to the water tank, and the end of the cylinder opposite to the one end of the shaft is fixed to the washing machine casing via a receiving member made of rubber. Connected to the attached mounting part,
Furthermore, prevented from rotating the receiving member relative to said end portion by fitting between said receiving member and said end of said cylinder in the axial direction around the cylinder, and, in the receiving member and said mounting portion A washing machine characterized in that the receiving member is prevented from rotating with respect to the mounting portion in the direction around the axis of the cylinder by fitting . The end portion of the cylinder includes, on its end surface, a cylinder side convex portion that protrudes in the axial direction concentrically with the axial center of the cylinder and has a linear portion on the outer surface,
Comprising a washer having a substantially donut plate shape, an inner straight portion corresponding to the straight portion of the cylinder-side convex portion on the inner surface, and an outer straight portion on the outer surface;
In the receiving member, a receiving member-side concave portion having a linear portion corresponding to the outer straight portion of the washer is formed on the inner surface,
The inner surface of the washer is fitted to the outer surface of the cylinder-side convex portion, and the receiving member-side concave portion of the receiving member is fitted to the outer surface of the washer so that the receiving member is opposed to the end portion of the cylinder. The washing machine according to claim 1, wherein the washing machine is prevented from rotating. The receiving member includes a receiving member-side convex portion having a linear portion on an outer surface at a lower portion thereof,
The mounting portion includes a rotation preventing hole portion having a linear portion corresponding to the linear portion of the convex portion on the receiving member side on the inner surface,
The washing machine according to claim 1 or 2, wherein the receiving member side convex portion of the receiving member is fitted into the rotation preventing hole portion to prevent the receiving member and the attachment portion from rotating.   The washing machine according to claim 3, wherein the anti-rotation hole portion of the attachment portion is configured by a burring protruding downward. The cylinder side convex portion has a plurality of the linear portions on the outer surface,
The washer has the same number of inner straight portions as the straight portions on its inner surface, and has a plurality of inner straight portions on its outer surface,
3. The washing machine according to claim 2, wherein the receiving member-side recess of the receiving member has the same number of straight portions as the plurality of inner straight portions.   The washing machine according to any one of claims 1 to 5, wherein the lead wire is led out from a lower portion of the cylinder.   The washing machine according to any one of claims 1 to 6, wherein a holder for fixing the lead wire to the cylinder is provided.   The washing machine according to any one of claims 1 to 7, wherein a bush is fitted into a through hole for allowing the lead wire to pass through the cylinder, and the lead wire is passed through a hole portion of the bush. . There are two dampers, provided to be separated from each other to support the left and right parts of the water tank, each lead wire is connected to the same connection partner,
The lead wires of these dampers are set to approximately the same length,
The washing machine according to any one of claims 1 to 8, wherein at least one of the lead wires is configured to be connected to a connection partner via a length adjusting relay line.

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