JP2699576B2 - Washing machine motor support device - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a motor support device for a washing machine that supports a motor.

2. Description of the Related Art As shown in FIG. 5, a conventional dehydration washing machine is provided with a washing and dewatering tub 2 inside a water tub 1 for storing water during washing. Pulsator 3
And a large number of small holes for drainage are provided on the side wall. Reference numeral 5 denotes a bearing box, which has a mechanism for transmitting a driving force of a motor 6 so as to rotate only the pulsator 3 at the time of washing and to rotate the washing / dewatering tub 2 at the time of spin-drying. The motor 6 transmits a driving force to the bearing housing 5 by a belt 7 and a pulley 8. Reference numeral 4 denotes a reinforcing plate provided with a water tank 1, a motor 6, a bearing 5 and the like.
Through the corner of the outer frame 10. 11 is a balancer provided above the washing and dewatering tub.

Problems to be Solved by the Invention In the above configuration, since the motor 6 is fixed to the water tank 1 via the reinforcing plate 4, the vibration of the motor 6
In particular, 2f vibration peculiar to the single-phase induction motor was directly transmitted to the water tub 1 and the washing and dewatering tub 2, and this vibration was enlarged in the water tub 1 and the washing and dewatering tub 2, and generated loud noise. In particular, these days, these noises are becoming a serious problem in the market, because housewives are becoming more occupied and washing at night is increasing.

In order to solve this problem, the motor 6 and the reinforcing plate 4
It has been considered that a cushioning material such as rubber is provided between the motor 6 and the motor 6 elastically supported by the cushioning material when the hanging portion including the motor 6 vibrates due to imbalance of the laundry. Therefore, there is a problem that the belt 7 slips.

Further, the vibration generated by the motor 6 includes rotational vibration of the motor shaft other than the main body of the motor 6, and this rotational vibration is transmitted to the water tub 1 and the washing and dewatering tub 2 via the belt 7 to generate noise. There was also.

Therefore, the present invention provides a motor support device that prevents motor vibration, particularly 2f vibration, from being directly transmitted to a water tub or a washing and dewatering tub, thereby significantly reducing noise and having high reliability. This is the first purpose.

A second object is to provide a low-noise motor supporting device which is inexpensive and requires few assembling steps.

Means for Solving the Problems In order to achieve the first object, the present invention provides a motor, which is a vibration source, a water tub and a washing and dewatering tub for expanding the vibration as noise, and the motor is provided with a lower part. A pulley is rotatably attached to the lower mounting plate, and the pulley and the motor shaft are connected by an elastic coupling.

In order to achieve the second object, the motor is sandwiched between a lower mounting plate and a reinforcing plate via an elastic support.

Operation According to the above configuration, the motor body is sandwiched between the lower mounting plate and the upper mounting plate via the elastic support,
The motor body vibration can be isolated here. Also,
Since the pulley and the motor shaft are connected via the elastic coupling, the rotational vibration of the motor shaft can also be insulated. Further, since the pulley is rotatably mounted on the lower mounting plate via a hollow shaft by a bearing, the rotational vibration of the motor shaft can also be insulated. Further, the problem that the pitch x between the pulley and the bearing box is reduced and the belt slips can be solved, and a structure that is stable in quality while reducing noise can be realized.

Furthermore, if the motor support function of the upper mounting plate is provided to the reinforcing plate, it is possible to realize an inexpensive one with a small number of assembly steps.

Embodiment An embodiment of the present invention will be described below with reference to FIGS. 1, 2, and 3. FIG. The same parts as those of the conventional example are denoted by the same reference numerals, and description thereof will be omitted.

In the figure, reference numeral 16 denotes an elastic support having a substantially cylindrical shape. The inner peripheral surface is fitted into and supported by the bearing 6b of the motor 6, and the outer peripheral portion is fitted into and supported by the lower mounting plate 14. An elastic support 16 is similarly fitted into 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 support 16.

Reference numeral 20 denotes a bearing press-fitted and fixed to a substantially central portion of the lower mounting plate 14, and a hollow shaft 19 is press-fitted and fixed to the inner peripheral surface thereof. The pulley 8 is fitted and screwed and fixed to the outer peripheral surface of the hollow shaft 19.

Reference numeral 18 denotes an elastic coupling, which connects the substantially rotation center of the pulley 8 and the motor shaft 6a via a lower washer 18b or an upper washer 18b formed integrally with the elastic coupling 18. The lower washer 18a is fitted into a concave portion provided below the pulley 8, and the upper washer 18b is fitted into the motor shaft 6a, through which rotational force is transmitted.

The lower mounting plate 14 is attached to the reinforcing plate 4 together with the upper mounting plate 15,
Screwed with bolts, pulley 8, elastic coupling 1
8, the hollow shaft 19, the bearing 20, the elastic support 16, and the motor 6 are disposed substantially coaxially.

The vibration of the main body of the motor 6 is reduced by the lower mounting plate 14 and the upper mounting plate.
The elastic modulus of the elastic support 16 is set so that the natural frequency in each direction of the motor 6 is equal to the 2f The settings are as follows. Similarly, the elastic modulus of the elastic cup rig is such that the natural rotation frequency of the rotor in the motor 6 is 2f frequency. The settings are as follows.

The elastic support 16 and the elastic cup rig 18 may be either rubber or metal coil springs. In short, both the motor 6 main body and its rotor are driven at the 2f frequency. What is necessary is that it can be supported by the following natural frequency.

FIG. 4 shows a second embodiment. In this embodiment, the upper mounting plate 15 is removed from the first embodiment. Instead, the elastic support 16 is mounted on the reinforcing plate 4 above the motor 6 mounting portion.
A recess 4a is provided for fitting with the outer peripheral portion.
The motor 6 is sandwiched between the lower mounting plate 14 and the lower mounting plate 14 via the elastic support 16.

Effect of the Invention As described above, since the present invention sandwiches the motor between the lower mounting plate and the upper mounting plate via the elastic support, vibration of the motor main body is hardly transmitted, and the motor shaft and the pulley are Since it is connected via the elastic coupling, the rotational vibration of the motor is hardly transmitted to the water tub or the washing and dewatering tub. Therefore, the vibration of the aquarium becomes smaller,
Thus, the noise generated is greatly reduced. In addition, since the pulley is mounted on the hollow shaft via the bearing press-fitted and fixed to the lower support, the pitch x between the pulley and the bearing box is reduced, despite the structure for reducing the vibration transmission of the motor. The problem that the belt slips can also be solved.

Further, in the present invention, since the motor supporting function of the upper mounting plate can be also used by the reinforcing plate, the configuration can be made inexpensively and the number of assembling steps can be reduced.

As described above, according to the present invention, there is an extremely great effect that the noise can be significantly reduced without substantially reducing the mounting strength of the motor.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a motor supporting device showing a first embodiment of the present invention, FIG. 2 is a longitudinal sectional view of the hanging portion, FIG. 3 is a bottom view of the hanging portion, FIG. FIG. 5 is a longitudinal sectional view of a motor support device showing a second embodiment of the present invention, and FIG. 5 is a longitudinal sectional view showing a conventional washing machine. 1 ... water tank, 2 ... washing and dewatering tank, 4 ... reinforcing plate, 6 ...
... Motor, 7 ... Belt, 8 ... Pulley, 14 ... Lower mounting plate, 15 ... Upper mounting plate, 16 ... Elastic support, 18 ... Elastic coupling, 19 ... Hollow shaft, 20 ... bearing.

Claims (2)

(57) [Claims] An elastic support made of an elastic body is sandwiched between an upper and lower part of a motor, a lower mounting plate and an upper mounting plate of the motor, and a hollow shaft is provided at a substantially central portion of the lower mounting plate via a bearing. A motor support device for a washing machine, which is rotatably provided, a pulley is fixed to the hollow shaft, and the pulley or the hollow shaft and the shaft of the motor are connected by an elastic coupling made of an elastic body. 2. An upper elastic support made of an elastic body is sandwiched between a reinforcing plate and an upper portion of the motor, and a lower elastic support is sandwiched between a lower portion of the motor and a lower mounting plate of the motor. A hollow shaft is rotatably provided at a substantially central portion of the lower mounting plate via a bearing, a pulley is fixed to the hollow shaft, and an elastic coupling comprising the pulley or the hollow shaft and the motor shaft formed of an elastic body. The motor support device of the washing machine connected by.