JPS58195591A - Drive apparatus of washer - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a driving device for a washing machine that performs washing and dehydration in a washing and dehydrating tub.

A conventional device of this type will be explained with reference to FIGS. 1 and 2. Reference numeral 1 denotes a washing tank and dehydration tank, which is housed inside an outer tank 2. Reference numeral 3 denotes a dehydration tank and a drive shaft, to which a dehydration tank boss 4 is connected by a nut 6, and the dehydration tank 1 is connected to the dehydration tank boss 4. Reference numeral 6 denotes a rotor shaft having a rotor blade 7 fixed to its top end, which is rotatably supported within the drive shaft 3 via an oilless metal 8. Reference numeral 9 denotes a bearing case, which supports the drive shaft 3 through a bearing 1o. A motor 11 is connected to a pulley 13 via a belt 12.

A pulley boss 15 is fixed to the pulley 13 by a bolt 14, and the pulley boss 15 is connected to the rotary blade shaft 6 by a pin 16.
is fixed.

Further, the drive shaft 3 is connected to the pulley boss 15 in only one direction via a clutch spring 17, and when the clutch claw 18 is engaged with the clutch boss 19, the clutch spring 17 is idle. Depending on the state, the torque of the motor 11 is changed from the belt 12 to the pulley 1.
3->pulley boss 15 - bin 16 - transmitted to the rotor shaft 6, the rotor blades 7 are rotated, and washing is performed. Control switch (
When the clutch claw 18 is disengaged from the clutch boss 19 by a solenoid (not shown) whose operation is controlled by a solenoid (not shown), power is transmitted to the drive shaft 3, and the torque of the motor 1 is transferred from the pulley 13 to pulley boss 15
-The clutch spring 17 is transmitted to the drive shaft 3 to rotate the washing/dehydration tub 1 and perform dewatering.

In the conventional device configured as described above, the pulley boss 15 and the rotor shaft 6 are connected by the pin 16, so it is necessary to make a relatively large hole in the rotor shaft 6 so that the pin 16 can pass through. , the strong deformation of the rotor shaft 6 is significantly weakened. Therefore, the rotor shaft 6 must have a large diameter to be able to withstand the torque transmitted by the pin 16. This not only increases the cost of materials, but also increases the rotor shaft's diameter. The circumferential speed of the metal 8 increases, putting a heavy burden on Metal 8. In addition, the manufacturing process involves the relatively difficult task of attaching a hole to the shaft, and furthermore, the pin 16 is generally tightly fitted into the hole, making assembly extremely difficult. Requires work.

In order to eliminate the above-mentioned problems, a method has been proposed in which the torque of the pulley boss 15 is transmitted to the rotor shaft 6 by making the part of the rotor shaft 6 into which the pulley boss 15 is inserted different in shape from other parts. ing. As shown in FIG. 3, the lower part of the rotor shaft 6 is made into an irregularly shaped part 6a so that the cross section smaller than the shaft diameter is substantially polygonal, and the hole of the pulley boss 16 is also made into the same irregular shape and inserted into the irregularly shaped part 6a. Then, the pulley boss 15 was brought into contact with the stepped portion 6b of the shaft formed by making the lower part of the rotor shaft an irregular shape, and the pulley 13 whose center hole had the same irregular shape was inserted and provided at the lower end of the rotor shaft. Tightening the bolt 14 to the female threaded portion 6C fixes the pulley boss 15 and pulley 13 to the rotating blade shaft 6 at the same time. However, the pulley 13 is generally made of sheet metal in order to keep costs low, but according to this method, as shown in No. Since contact is not possible, the hole in the wire pulley 3 is easily deformed due to the transmitted torque, and during assembly, the pulley 13 immediately deviates from the rotor axis 6- before the bolt 14 is tightened. There were various disadvantages such as impairing assembly efficiency.

The present invention has been made in view of this point, and one embodiment will be described below with reference to FIGS. 5 and 6.

Components that are the same as those in FIGS. 1 and 2 are designated by the same numbers and their explanations will be omitted. The rotor shaft 6 has an irregularly shaped portion 6a with a substantially polygonal cross section at a lower portion slightly lower than the lower end of the lower oilless metal 8, and this irregularly shaped portion 6a is larger than the shaft diameter of the rotor shaft 6. is also small. pulley boss 15
A through hole 15a having the same shape as the irregularly shaped portion 6a of the rotary blade shaft 6 is provided at the center. The boo IJ13 made of sheet metal has a hole 1 in the center that has the same shape as the through hole 15a of the pulley boss 15.
3a is provided. These are inserted into the irregularly shaped portion 6a of the rotary blade shaft 6 in the order of the pulley boss 16 and the pulley 13. In addition, the irregularly shaped portion 6a of the rotary blade shaft 6 has a length such that it projects slightly below the lower end surface of the pulley 3 when the pulley boss 15 and the boo IJ 13 are inserted and the irregularly shaped portion 6a is in the engaged state. A male screw portion 6d having a smaller diameter than the irregularly shaped portion 6a is formed at the tip of the portion 6a. A nut 21 is screwed onto this male threaded portion 6d.
On the pulley 13 side of 1, there is an irregularly shaped portion 6a of the rotor shaft 6.
A bored portion 21a is provided which has a diameter larger than that of the pulley 13 and is longer than the length of the irregularly shaped portion 6a protruding from the pulley 13. The pulley boss 15 and pulley 13 are fastened and fixed to the rotor shaft 6 by this nut 21.

With the above configuration, the pin 16 is not required for torque transmission from the pulley boss 15 to the rotor shaft 6, and therefore the through hole for inserting the pin in the rotor shaft 6 can be omitted. can be made with a small diameter, which is advantageous not only for reducing material costs but also for metals, etc. or,
In addition to eliminating the process of drilling holes that are difficult to manufacture for pin insertion, the irregularly shaped part 6a completely passes through the sheet metal boo 913, so the pulley does not deviate from the rotor shaft 6 during assembly, impairing assembly. This also eliminates the inconvenience.

As described above, the present invention is extremely superior in that it can easily solve the conventional problems by considering the configuration of the lower end portion of the rotor shaft.

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[Brief explanation of the drawing]

Fig. 1 is a vertical cross-sectional view of the main parts of a conventional dehydrating washing machine, Fig. 2 is an enlarged view of the main parts, Fig. 3 is a perspective view of the conventional rotor shaft, and Fig. 4 is an enlarged sectional view of the main parts. , FIG. 6 is a perspective view of a rotor shaft showing an embodiment of the present invention, and FIG. 6 is an enlarged sectional view of the main part. 1...Washing tank tax-free water tank, 2...Outer tank,
3... Dehydration tank drive shaft, 6... Rotating blade shaft, 6a... Unusual shaped part, 7... Rotating blade,
13... Pulley, 13a... Hole, 15
...Pulley boss, 15a...Through hole,
21...Natsuto. Name of agent: Patent attorney Toshio Nakao and one other person,' Figure 2 L: Figure 3

Claims (1)

[Claims] The rotary blade shaft includes a pulley, a hollow dehydration tank 1 drive shaft connected to the pulley 17 via a clutch spring, and a rotor shaft located within the dehydration tank drive shaft to which the pulley and pulley boss are connected. The lower end of the blade shaft is made into an irregularly shaped part that is different from the others, and a male screw part is provided at the lower part, and a hole with the same shape as the cross section of the irregularly shaped part of the rotor blade shaft is formed in the center of the pulley boss and the pulley. A driving device for a washing machine, wherein a pulley boss and a pulley are inserted into the irregularly shaped portion of the rotor shaft, and are fastened to the rotor shaft by a nut that is screwed onto the male threaded portion.