JPH07156B2 - Dehydrating combined washing machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Field of Industrial Application) The present invention relates to a washing machine for combined use of dehydration, which has an improved supporting structure for a rotary tub.

(Prior Art) In a spin-drying combined washing machine, as a supporting structure of a rotary tub, a reduction mechanism for lowering the rotation of a motor at the time of washing and transmitting it to an agitator at the lower part of an upper shaft body connected to the rotary tub. There is a structure in which a case accommodating and housing a lower shaft is connected to form a rotary tank support, and the upper shaft and the lower shaft are supported by an upper bearing and a lower bearing. An example of this support structure is shown in Japanese Patent Laid-Open No. 56-121591.

As shown in FIG. 5, this product has a case 3 at the lower end portion of a dehydration tank shaft 2 connected to a rotary tank 1 (this includes a pulsator shaft 4 connected to a pulsator by decelerating rotation of a motor during washing). (The deceleration mechanism 5 for transmitting to the motor is stored), and the dehydration drive shaft 6 rotated by a motor during dehydration is fitted to the lower part of the case 3 to form the rotary tank support 7 as described above. is doing. The dehydration tank shaft 2 as the upper shaft body and the dehydration drive shaft 6 as the lower shaft body of the rotary tank support 7 are supported by the upper bearing 8 and the lower bearing 9, respectively, and thereby the rotary tank 1 is rotatably supported. , Is.
In this case, the upper boss portion 10a protruding from the lid 10 of the case 3
The lower boss portion 3b protruding from the lower surface of the case 3 is fitted to the outside of the dehydration tub shaft 2 and the dehydration drive shaft 6, respectively. The lower boss 3a is brought into contact with the inner ring 9a of the lower bearing 9 so that the lower bearing 9 receives the thrust load of the rotary tank 1.

(Problems to be Solved by the Invention) In the above conventional configuration, the axial distance between the upper end surface of the upper boss portion 10a and the lower end surface of the lower boss portion 3a is determined by the height of the peripheral wall portion of the case 3 and the lid 10. There is a circumstance that each gear case is affected by manufacturing errors and assembling errors such as the thickness dimension of the above, the protruding height dimension of the upper boss portion 10a and the lower boss portion 3a, and the like. Therefore, the gap between the upper bearing 8 and the lower bearing 9 is set to be slightly larger in consideration of the error in the axial distance between the upper end surface of the upper boss portion 10a and the lower end surface of the lower boss portion 3a. When the boss portion 3a is brought into contact with the inner ring 9a of the lower bearing 9, the upper boss portion 10a is prevented from coming into contact with the inner ring 8a of the upper bearing 8. Therefore, a slight gap G is formed between the upper boss portion 10a and the upper bearing 7.

And in the conventional case where such a gap G is inevitably generated,
The rotary tank support 7 is affected by the vibration of the rotary tank 1 during dehydration.
Is shaken up and down by the gap G with respect to both bearings 8 and 9, and a sound is produced. Actually, the rotary tank support 7 not only simply swings up and down but also rotates, which causes complicated swing and further noise. The complicated runout of the rotary tank support 7 as described above gives a stress to each part and causes a decrease in durability.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a washing machine for combined use of dehydration, which can prevent the rotary tub support from moving vertically with respect to the bearing.

[Structure of the Invention] (Means for Solving the Problem) A washing machine for combined use of dehydration according to the present invention is provided with an upper shaft body connected to a rotary tub and a motor for decelerating the rotation of the motor during washing and transmitting the deceleration to the stirring body. A case in which a case in which a speed reduction mechanism is housed and arranged and a lower shaft body are sequentially connected to form a rotary tank support body, and the upper shaft body and the lower shaft body are supported by an upper bearing and a lower bearing which are rolling bearings. In the above, a large diameter portion is provided in a portion of the upper shaft body located above the upper bearing, and the case is fitted around the lower outer periphery of the upper shaft body. It is characterized in that the inner ring of the upper bearing is sandwiched.

(Function) Since the inner ring of the upper bearing is sandwiched between the upper shaft body and the case, the rotary tank support does not move vertically with respect to the bearing. Therefore, the rotary tank support does not swing up and down during dehydration.

(Embodiment) An embodiment of the present invention will be described below with reference to FIGS. 1 to 4.

In FIG. 4, reference numeral 21 denotes an outer box, in which a water receiving tank 22 is arranged, and is elastically supported by a hanging rod mechanism 23 so as to be swingable. Reference numeral 24 denotes a rotary tank which is disposed in the water receiving tank 22 and which serves both as a washing tank and a dehydrating tank, and has a large-sized pulsator 25 as a stirring body for washing which rotates at a relatively low speed at the inner bottom portion. . A power control mechanism 26 is shown in FIG. 4 for decelerating and transmitting the rotational force of the motor 27 to the pulsator 25 at the time of washing, and transmitting it to the rotator 24 and the pulsator 25 at the time of dewatering to integrally rotate both. Speed reducer 28, clutch mechanism
29 and a brake mechanism 30 are built in. That is, 31 is a dehydration shaft fixed to the rotary tank 24, and this dehydration shaft 31 is fitted on the upper end side of a cylinder shaft 32, and the cylinder shaft 32 constitutes an upper shaft body 33. 34 is a case of the reduction gear 28, and this case 34 is a main body case 35 and a lid fixed to the lower surface of the main body case 35.
It consists of 36 and. The case 34 has a boss portion 35a integrally formed on the upper surface of the main body case 35 and fitted to the lower end side of the cylindrical shaft 32. Further, a hollow shaft 37 as a lower shaft body is integrally formed with the lid 36. In this way, the case 34 and the hollow shaft portion 37 are connected to the upper shaft body 33 to form the rotary tank support 38. Then, the rotary tank support 38 connects the cylinder shaft 32 of the upper shaft body 33 to the power control mechanism 16
The rolling bearing mounted on the outer case 39, for example, is inserted and supported by the upper bearing 40 formed of a ball bearing, and the hollow shaft portion 37 is inserted and supported by the lower bearing 41 formed of a ball bearing mounted on the outer case 39. In this case, the upper bearing of the upper shaft 33
A portion located at the upper portion of 40, that is, a dehydration shaft 31 having a diameter larger than that of the cylindrical bearing 32 is a large diameter portion of the upper shaft body 33.
The inner ring 40a of the upper bearing 40 is sandwiched between and the boss portion 35a of the main body case 35. Therefore, the hollow shaft portion 37 is attached to the lower bearing 41.
Even if the inner ring 41a of the upper bearing 40 is fitted to the inner ring 41a so as to move up and down, the dehydration bearing 31 and the boss portion 345a of the main body case 35 sandwich the inner ring 40a of the upper bearing 40, so The bearings 40 and 41 are designed so as not to move up and down.

By the way, a planetary gear mechanism 42 as a reduction mechanism is housed in the case 34 of the reduction gear 28. The output shaft 43 of the reduction gear transmission 28 is inserted into and supported by the cylindrical shaft 32 via a bearing 44, and the pulsator 25 is fixed to the upper end of the output shaft 43. Further, the hollow shaft 37 has an input shaft 45 of the speed reducer 28.
Is supported through a bearing 46, a driven pulley 48 having a sleeve 47 is fitted to the lower end of the input shaft 45, and a belt 50 is provided between the driven pulley 48 and a drive pulley 49 of the motor 27. Are handed over. Reference numeral 51 is a clutch spring of the clutch mechanism 29, which is wound around the hollow shaft portion 37 and the sleeve 47, and the lower end portion is engaged with the clutch case 52.
Reference numeral 53 is a brake band of the brake mechanism 30, which is wound around the body case 35 of the speed reducer 28 as a brake drum. Reference numeral 54 denotes a lever that is rotatable about a shaft 55, and a clutch side engaging portion 54a that engages with a plurality of ratchet pawls 52a provided on the outer periphery of the clutch case 52 to restrain the rotation of the clutch case 52, and a brake band. The brake band 53 is engaged with a locking piece 53a formed by bending at one end of 53.
And a brake side engaging portion 54b for restraining the rotation of the.

On the other hand, in FIGS. 1 and 2 showing the concrete structure of the planetary gear mechanism 42, 56 is an internal gear arranged in the body case 35 in a rotation-stopped state, and 57 is integrated with the upper end of the input shaft 45. A sun gear integrally formed by machining teeth 57a on the peripheral surface of the upper end of the input shaft 45, and 58 is, for example, four planetary gears that mesh with both the internal gear 56 and the sun gear 57. .
The planet gear 58 has circular holders 59 and 60 at both upper and lower ends.
The shaft 61 inserted into the holders 59 and 60 is fixed to the upper and lower brackets 62 and 63. In this case, the upper and lower brackets 62 and 63 are bosses protruding from the upper bracket 52.
The lower end of 52a is fixedly connected to each other by caulking, and at the time of caulking, between the upper end of the tooth 56a of the internal gear 56 and the annular rib 56b of the lower inner periphery, a step of the upper holder 59 and the lower bracket 63 is formed. The internal gear 56 is unitized together with the planetary gear 58 and the upper and lower brackets 62, 63 by being sandwiched between the portion 63a and the portion 63a with a slight vertical movement margin. When assembling, the dehydration shaft 31 is attached to the main body case 35.
The output shaft 43 is inserted into and supported by the tubular shaft 32 while the brake band 53 is wound around the outer circumference of the main body case 35, while the hollow shaft portion 37 of the lid 36 receives an input. The shaft 45 is inserted and supported. Then, the internal gear 56, the planetary gear 58, and the upper and lower brackets 6 unitized as described above.
2, 63 are inserted and arranged in the main body case 35. By this insertion, the serration hole 64 formed in the center of the upper bracket 62 that supports the planetary gear 58 is fitted in the serration tooth 65 formed in the lower end of the output shaft 43, and the both are connected. To be done. After that, the sun gear 57 of the input shaft 45 is engaged with the planetary gear 58 so that the central hole of the lower bracket 63 is
Insert from 63a, and fix the lid 36 to the lower surface of the main body case 35 with screws 66. In addition, the rotation stop of the internal gear 56 is
56 A convex portion 36a formed on the upper surface of the lid 36 in a concave portion 67 formed on the lower surface
It is done by fitting. Further, the lower holder 60 of the planetary gear 58 is set to have an outer diameter smaller than the diameter of the root circle of the planetary gear 58 so that the sun gear 57 can be inserted from below. Wear is prevented by setting the diameter of the gear 58 larger than that of the gear 58 to bring the circumferential surface of the tooth 56a of the internal gear 56 into contact with the gear 56a.

Next, the operation of the above configuration will be described. FIG. 4 shows a state at the time of washing, in which the lever 54 restrains the rotation of the clutch case 52 by the clutch side engaging portion 54a and the rotation of the brake band 53 by the brake side engaging portion 54b. . Therefore, as is well known, the clutch spring 51 is prevented from being unable to be tightened and the rotation of the motor 27 is prevented from being transmitted to the hollow shaft portion 37, and the main body case 35 and hence the rotary tank 24 are braked. ing. In this state at the time of washing, the motor 27 rotates in the forward and reverse directions, and the rotation is driven by the driven pulley 48.
From the sun gear 57 to the input shaft 45 of the reduction gear 28
Rotates. Then, the planetary gear 58 rotates and the sun gear
A planetary motion is made around 57, and the upper and lower brackets 62, 63 rotate integrally with this planetary motion. The output shaft 43 is rotated by the rotation of the brackets 62 and 63, and the pulsator 25 is rotationally driven at a low speed.

On the other hand, at the time of dehydration, the lever 54 is rotated to rotate both engaging parts 54a and 5a.
In order to release the restraint of the clutch case 52 and the brake band 53 by 4b, as is well known, the clutch spring 51 can be freely wound, and the main body case 35 and thus the rotary tub 24 are released from braking. During dehydration, the motor 27 rotates in one direction in this state, and the rotation is transmitted from the driven pulley 48 to the hollow shaft portion 37 not only through the input shaft 45 but also through the clutch spring 51. twenty five
Rotate integrally at high speed.

According to the above configuration, the dehydration shaft 31 and the boss portion 35 of the main body case 35.
Since the inner ring 40a of the upper bearing 40 is sandwiched between a and
Even if 37 is fitted to the inner ring 41a of the lower bearing 41 so as to be able to move up and down, the vertical movement of the rotary tank support 38 is restricted by the upper bearing 40. For this reason, the rotary tank support 38 does not move up and down with respect to the bearings 40 and 41.Therefore, during spin-drying, the rotary tank support 38 shakes up and down, producing noise and stressing each part. There is no danger of causing noise, low noise operation is possible, and the service life is long.

[Structure of the Invention] As described above, in the present invention, since the inner ring of the upper bearing is sandwiched between the upper shaft body and the case, the rotary tank support does not move vertically with respect to the bearing, Therefore, during spin-drying, the rotary tank support does not swing up and down, there is no risk of noise and stress on each part, low noise operation is possible, and long life can be achieved. That is an excellent effect.

[Brief description of drawings]

1 to 4 show an embodiment of the present invention.
FIG. 1 is a vertical side view of a main part, FIG. 2 is an exploded vertical side view of a speed reducer, FIG. 3 is a horizontal cross-sectional view of the same, and FIG. 4 is a vertical side view of a spin-drying washing machine. Further, FIG. 5 is a vertical cross-sectional side view showing a conventional supporting structure for a rotary tank. In the figure, 24 is a rotary tank, 25 is a pulsator (agitator), 27 is a motor, 28 is a speed reducer, 31 is a dehydration shaft, 32 is a cylinder shaft, 33 is an upper shaft member, 34 is a case, 35 is a main body case, 36 is a lid, 38 is a rotary tank support, 40 is an upper bearing, 40a is an inner ring, 41 is a lower bearing, 4
2 is a planetary gear mechanism (reduction mechanism), 43 is an output shaft, 45 is an input shaft, 56 is an internal gear, 57 is a sun gear, 58 is a planetary gear, 62, 63
Is a bracket.

Claims (1)

[Claims] 1. An upper shaft body connected to a rotary tank, a case accommodating a reduction mechanism for decelerating the rotation of a motor during washing and transmitting the speed to an agitator, and a lower shaft body are sequentially connected. In which the upper shaft body and the lower shaft body are supported by an upper bearing and a lower bearing, which are rolling bearings, and which constitutes a rotary tank support body, and a portion of the upper shaft body which is located above the upper bearing. And a case where the case is fitted around the lower part of the upper shaft body, and the inner ring of the upper bearing is sandwiched between the large part of the upper shaft body and the case. Washing machine for combined use of dehydration.