JPS6036230Y2 - Clutch mechanism of dehydrating washing machine - Google Patents

Description

[Detailed description of the invention] This invention relates to a clutch mechanism that switches between dewatering and washing in a dehydrating washing machine, and includes a clutch piece that operates a clutch spring that transmits and cuts off power from the drive shaft to the dehydrating shaft. The purpose is to improve the durability of

FIG. 1 is a cross-sectional view of the main parts of a dehydrating washing machine. Reference numeral 1 denotes a washing and dehydrating tank, and a pulsator 2 for stirring the laundry is rotatably disposed in the center of the bottom of the tub.

Reference numeral 3 denotes a flange that supports the washing and dehydrating tub 1, and this flange 3 is fixed to a hollow dehydrating shaft 4.

Reference numeral 5 denotes a washing shaft installed coaxially with the dewatering shaft 4 and connected to the pulsator 2.

Further, the dewatering shaft 4 is rotatably supported by a bearing 6.6', and is fixed integrally with a housing 7.8 that supports this bearing 6.6' to form a mechanical part. It is fixed to the outer bottom of 9 in a watertight manner.

A drive shaft 10 is fixed to the lower end of the washing shaft 5 by a spring pin 11, and a drive pulley 12 is fixed to the drive shaft 10.

The lower end of the dewatering shaft 4 is in contact with the drive shaft 10 so as to be able to slide up and down, and has approximately the same diameter, and a clutch spring 13 is wound around the outer periphery of the lower end of the dewatering shaft 4 and the drive shaft 10. There is.

At the lower end of this clutch spring 13 there is a claw portion 1.
4, and this claw part 14 is connected to the clutch spring 13.
It is engaged with a clutch boss 15 provided on the outside of the clutch boss 15.

Further, a plurality of blade portions 16 are integrally formed on this clutch boss 15.

Further, a clutch piece 17 disposed so as to be engaged with and disengaged from the vane portion 16 is rotatably supported by a pin 19 on an actuating plate 18.

The actuating plate 18 is connected to the shaft 24 together with the brake operating plate 23.
It is rotatably held by.

Moreover, the brake operation plate 23 is a brake band 2 wound around a brake drum 20 fixed to the dehydration shaft 4.
1.

In the above configuration, when the actuating plate 18 operates the clutch piece 17 to engage the blade portion 16 of the clutch boss 15, the brake operating plate 23 acts to prevent rotation of the brake drum 20, and also acts to prevent the clutch boss 15 from rotating. presses the claw portion 14 of the clutch spring 13.

As a result, the clutch spring 13 is loosened and power cannot be transmitted between the drive shaft 10 and the dewatering shaft 4, and the drive pulley 1 to which power is transmitted via the belt 25
In the rotation 2, only the washing shaft 5 is rotated to perform the washing action.

Further, when the actuating plate 18 and the brake operating plate 23 are rotated to separate the clutch piece 17 from the blade portion 16 and the brake operating plate 23 from the brake band 21, the clutch spring 13 is moved between the drive shaft 10 and the brake operating plate 23. The lower end of the dewatering shaft 4 is tightened, so that the power of the drive shaft 10 is transmitted to the dehydrating shaft 4 via the clutch spring 13 to rotate the washing and dehydrating tub 1 at high speed to perform dewatering.

When this dehydration operation is completed, the same operation as in the washing state can be performed.

That is, if the brake operating plate 23 and the operating plate 18 are rotated so as to be in the washing state, the brake is applied and power transmission is stopped.

The above is an overview of the clutch mechanism of a dehydrating washing machine. Conventionally, the clutch piece 17 that switches between washing and dehydrating operations is constructed of a metal piece, and the blades of the clutch boss 15, which is the mating part of the clutch piece 17, 16 is generally made of a hard resin such as polyacetal.

Therefore, with such a configuration, the clutch piece 17 engages with the blade part 16 of the clutch boss 15 in an impactful manner during dehydration braking, etc., so the blade part 16 is severely worn and damaged, and the clutch operation is impaired due to this wear. This has the problem that it cannot be done reliably, and the impact noise is loud when engaged.Furthermore, since the clutch pieces 17 are made of metal, it is necessary to perform edge finishing and rust prevention treatment after pressing. It was also expensive in terms of cost.

In order to solve the above problems, the present invention has a configuration as shown in FIGS. 2 and 3.

That is, the clutch piece 17 has a pin 19 at the tip of the actuating plate 18.
The clutch piece 17 and the clutch boss 15 having the blade portion 16 are made of the same type of hard resin material and are set to have approximately the same hardness. The portion that engages with the blade portion 16 is made wider in an upper direction 26 and a lower direction 27 than the support portion supported by the pin 19.

With this configuration, even if the clutch piece 17 engages with the blade part 16 of the clutch boss 15 in an impact, the clutch piece 17 and the blade part 16 of the clutch boss 15 are made of the same type of hard resin material. Because they are configured to have the same hardness, the impact can be alleviated by the elasticity inside the resin of both parts, unlike the conventional combination of metal clutch pieces and resin blades. Furthermore, since the blade engaging portion of the clutch piece 17 is wider in the height direction than the supporting portion, the impact supporting area when both are engaged can be increased, and the load per unit area can therefore be reduced. As a result, the durability of both can be significantly improved.

Note that the same system means that the blade portion of the clutch boss and the clutch piece are formed of the same hard resin material.

The clutch boss 15 is generally made of polyacetal, nylon, polypropylene, glass fiber reinforced plastic, or the like.

That is, if one of the clutch boss 15 and the clutch piece 17 is made of an extremely hard material such as metal, as in the past, only the other one will wear out significantly over many years of use.

In particular, due to its shape, manufacturing the clutch boss 15 by resin molding leads to improved productivity, so conventionally resin materials have often been used for the clutch boss 15. However, when the clutch piece is made of metal, the clutch piece 17 The clutch boss 15 wears out in accordance with the shape of the clutch, causing a problem that the function of the clutch is impaired.

Furthermore, depending on the wear condition of the blade portion 16 of the clutch boss 15, the engagement with the clutch piece 17 may not be achieved properly.
There were problems such as the tip of the clutch piece 17 hitting the tip of the blade portion 16 of the clutch boss.

However, according to the present invention, such problems can be solved.

In addition, since the blade engagement portion of the clutch piece 17 is made wider downward, the impact load application point A is also applied to the caulked portion 2 of the support pin 19.
8, the bending moment applied to the caulking portion 28 of the pin 19 can be reduced, and the impact noise when the two engage can be reduced compared to the conventional one. etc., it is possible to exhibit various practical effects with a simple configuration.

[Brief explanation of drawings]

FIG. 1 is a vertical cross-sectional view of a main part of a dehydrating washing machine, FIG. 2 is a plan view of a clutch mechanism showing an embodiment of the present invention, and FIG. 3 is a front view of the clutch mechanism. 1...Washing/dehydration tank, 2...Pulsator, 4...Dehydration shaft, 5...Washing shaft, 10...Drive shaft , 3...Clutch spring, 15...Clutch boss, 16...Blade, 17...Clutch piece, 18...Operating plate, 19...Pin.

Claims (1)

[Scope of utility model registration request] A washing and dehydrating tub having a pulsator at the bottom, a washing shaft for rotating the pulsator, a dehydrating shaft in which the washing shaft is installed and rotating the washing and dehydrating tub, and a dehydrating shaft located below the dehydrating shaft for rotating the washing and dehydrating tub. A drive shaft fixed to the lower end of the washing shaft,
A clutch spring wound around the outer periphery of the drive shaft and dewatering shaft, and an actuating plate having a clutch piece that is engaged with and released from a blade of a clutch boss to which one end of the clutch spring is engaged and supported by a pin. In the dehydrating washing machine, the blade engaging portion of the clutch piece is made wider in the height direction than the support portion, and the blade portion of the clutch piece and the clutch boss are made of the same type of hard resin material and set to have approximately the same hardness. A clutch mechanism for a dehydrating washing machine that is characterized by its structure.