JPH03268790A - Washing machine - Google Patents

Abstract

PURPOSE:To remarkably reduce a noise by sandwiching a motor between a lower mounting plate and an upper mounting plate via an elastic supporting body, and linking a motor shaft to a pulley via an elastic coupler. CONSTITUTION:An almost cylindrical elastic supporting body 16a made of a rubber material, etc., is formed in such a way that the inner circumferential plane of it is fitted in and supported with the bearing part 6b of the motor 6 and the outer circumferential plane with the lower mounting plate 14. Also, an almost cylindrical elastic supporting body 16b made of the rubber material, etc., is fitted in the upper mounting plate 15, and the motor 6 is sandwiched between the lower mounting plate 14 and the upper mounting plate 15 via the elastic supporting bodies 16a and 16b. In such the case. the elastic coupler 18 is arranged in series between a pulley shaft 20 and the motor shaft 6a, and torque is transmitted via the elastic coupler 18. Thereby, it is possible to remarkably reduce the noise with scarcely lowering the mounting strength of the motor.

Description

[Detailed description of the invention] Industrial applications The present invention relates to a washing machine, and more particularly to a motor support device thereof.

2. Description of the Related Art A conventional support device for a washing machine will be described below with reference to FIG. 6, taking a dehydrating washing machine as an example. As shown in the figure, a washing/dehydration tank 2 installed inside a water tank 1 that stores water during washing has a pulsator 3 for agitating clothes at the center inner bottom and a number of small holes 23 for draining water on the side wall. There is. The bearing box 6 has a mechanism for transmitting the driving force of the motor 6 so as to rotate only the pulsator 3 during washing, and to rotate the washing and dewatering tub 2 during dehydration. Further, the motor 6 transmits driving force to the bearing box 5 through a belt 7 and a pulley 8.

A water tank 1, a motor 6, a bearing box 6, etc. are disposed on the support plate 4, and are supported by a rod 9, hanging from a corner of an outer frame 10 via a suspension spring 12 and a spherical seat 13. Further, a balancer 11 is provided above the washing and dehydrating tank.

Problems to be Solved by the Invention In such a conventional configuration, since the motor 6 is fixed to the water tank 1 via the support plate 4, the vibration of the motor 6, especially the 2f vibration peculiar to a single-phase induction motor, is transmitted to the water tank 1. , and was directly transmitted to the washing and dehydrating tank 2, and this vibration was amplified in the water tank 1 and the washing and dehydrating tank 2, producing a large noise. Particularly in recent years, more and more housewives are becoming employed, and more and more households are returning home in the evening and doing their laundry at night, so the noise of laundry being carried out at night, when it is quiet, is undesirable.

Furthermore, in order to reduce the noise of the washing machine, it has been considered to provide a cushioning material such as rubber between the motor 6, which is the source of the noise, and the support plate 4, but There was also the problem that when the hanging part including the motor 6 vibrates due to unbalanced laundry, the motor 6, which is elastically supported by a cushioning material, shakes, loosening the belt, and causing the per door to slip. .

Furthermore, the vibrations emitted from the motor 6 include rotational vibrations of the motor shaft in addition to vibrations of the motor 6 body. This rotational vibration is transmitted to the water tank 1 and the washing and dewatering tank 2 via the belt 7.
There was also a defect in that the noise was transmitted to the main unit of the 5th motor and 6th unit and emitted noise of a different frequency from the noise generated from the main unit.

The present invention has been made to solve the above-mentioned problems, and aims to reduce the number of people operating a washing machine and to prevent belt slippage caused by motor vibration.

Means for Solving the Problems To achieve this object, the washing machine of the present invention has a lower mounting plate in order to insulate vibrations from the motor, which is a source of noise, and the water tank and washing/dehydration tank, which amplify the noise, from the motor. The motor is sandwiched between the upper mounting plate and the upper mounting plate via an elastic support, and the pulley is rotatably mounted on the lower mounting plate via a bearing, and the pulley and the motor shaft are connected by an elastic coupling. It is multi-connected.

Effect: With this configuration, the motor body is sandwiched between the lower mounting plate and the upper mounting plate via the elastic support, so that vibrations of the motor body can be insulated by the elastic support. Furthermore, since the pulley and the motor shaft are connected via the elastic coupling, rotational vibrations of the motor shaft can also be insulated by the elastic coupling. moreover,
Since the pulley is rotatably attached to the lower mounting plate, the pitch between the pulley and the bearing box is shortened, which eliminates the problem of the belt loosening and slipping, resulting in a structure that is stable in terms of quality while reducing noise. can be realized.

Example Hereinafter, one embodiment of the present invention will be described with reference to the drawings.

Note that parts that are the same as those in the conventional example are indicated by the same numbers, and explanations thereof will be omitted.

Example 1 As shown in FIGS. 1 to 3, a substantially cylindrical elastic support 16 made of rubber material or the like! L is the inner peripheral surface of the motor 6
The outer peripheral portion of the bearing portion 6b is fitted and supported by the lower mounting plate 14. Further, a substantially cylindrical elastic support body 16b made of rubber material or the like is similarly fitted into the upper mounting plate 16, and the motor 6 is connected to the lower mounting plate 14 and the upper mounting plate 1.
60 via elastic supports 161L and 16b.

A pulley 8 that drives a belt 7 connected to a pulley of a bearing box 6 is pivotally supported via a pulley shaft 20 by a bearing 19 fixed below a lower mounting plate 14.

The approximate center of rotation of the pulley 8 and the motor shaft 6a are connected via a lower washer 182L and an upper washer 18b that are integrally molded with an elastic coupling 18 made of an elastic body such as a rubber material.

The lower washer 18a is fitted and fixed to the pulley shaft 20, and the upper washer 18b is fitted and fixed to the motor shaft (not shown), respectively, and the elastic coupling 18 is fitted between the pulley shaft 20 and the motor shaft 6.
This elastic coupling 18 is arranged in series between
The rotational force is transmitted through.

The lower mounting plate 14 is attached to the support plate 4 together with the upper mounting plate 16.
The pulley 8, the pulley shaft 20. The bearing 19, the elastic coupling 18, the elastic support 16, and the motor 6 are arranged substantially coaxially.

Example 2 As shown in FIGS. 4 and 6, in contrast to Example 1,
Upper and lower washers 181L are attached to the motor shaft ea or the pulley shaft 2o as shown in the first embodiment.

Instead of connecting with the elastic coupling 18 integrally molded with the elastic coupling 18b, the elastic coupling 18C made of an elastic material such as a rubber material is connected with a plurality of claws fixed to the motor shaft 6a or the pulley shaft 2o. It is something. This configuration has the feature that it can be constructed at a lower cost than the first embodiment. 21 is motor shaft 6I
The motor shaft bearing fixed to L, 22 is a pulley shaft load fixed to the pulley shaft 20, and each pawl fits into a plurality of recesses provided above and below the elastic coupling 180, thereby increasing the rotational force. The communication will take place.

In both Embodiments 1 and 2, in order to prevent the vibration of the main body of the motor 6 from being directly transmitted to the lower mounting plate 14 and the upper mounting plate 16, the elastic modulus of the elastic support 160 is set so that the natural frequency of the elastic support 16 is the same as that of the motor. 6. It is set so that it is less than 1/2 times the 2f frequency generated from the main body. Also,
The elastic modulus of the elastic couplings 18 and 180 is also set so that the natural frequency of the elastic couplings 18 and 18C is 2 times the rotational natural frequency of the rotor of the motor 6, which is 1/2 times the frequency or less. There is.

The elastic support 16 and elastic couplings 1B, 18
c may be either a rubber or metal spring, as long as it can support both the main body of the motor 6 and its rotor at a natural frequency that is 1/〆T times the 2f frequency or less.

Although the bearing 19 is a rolling bearing, it may also be a flat bearing.

Effects of the Invention (In the present invention, the motor is sandwiched between the lower mounting plate and the upper mounting plate via an elastic support, so vibrations of the motor body are difficult to transmit, and the motor shaft and pulley Since the two are connected via one elastic coupling, almost no rotational vibration of the motor is transmitted to the water tank or the washing and dewatering tank.

Therefore, the vibration of the water tank is reduced, and the noise generated thereby is significantly reduced. In addition, while the structure reduces vibration transmission to the motor, the pulley is rotatably attached to a hollow shaft fixed to the lower support, which reduces the pitch between the pulley and the bearing box. The problem of the belt slipping can also be solved.

As described above, according to the present invention, the extremely large effect of significantly reducing noise can be achieved without substantially reducing the mounting strength of the motor.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional view of a washing machine according to Embodiment 1 of the present invention. Fig. 2 is a longitudinal cross-sectional view of the motor support device, and Fig. 3 is a longitudinal cross-sectional view of the motor support device. 1...Aquarium, 2...Washing/dehydration tank, 6...
...Motor, 7...Belt, 8...
...Pulley %14...Lower mounting plate, 16...
...Upper mounting plate, 16...Elastic support, 1a.
...Elastic coupling, 19...Bearing,
20...Pulley shaft.

Claims (1)

[Claims] Elastic supports made of elastic bodies are arranged at the upper and lower parts of the motor, the motor is sandwiched between a lower mounting plate and an upper mounting plate via the elastic supports, and a bearing is installed approximately at the center of the lower mounting plate. A pulley is rotatably supported on this bearing,
A washing machine having a motor support device that connects a pulley or a pulley shaft and a motor shaft with an elastic coupling made of an elastic body, and transmits rotation of the motor to the pulley via the elastic coupling.