JPH0433690A - Motor supporting device of washing machine - Google Patents

Abstract

PURPOSE:To prevent moment applied to a bearing even when a high radial load functions on a pulley when a belt is provided with high tension by arranging the center axis of the bearing and that in the lateral direction of the pulley on the same axis. CONSTITUTION:The bearing is fixed with pressure almost in the center part of a lower mounting plate 14, and a pulley shaft 19 is fixed on the inner peripheral plane of the bearing. The pulley 8 is fixed with a screw by fitting at the lower part of the pulley shaft 19, and the diameter of the inner peripheral plane 8a of the pulley 8 is formed larger than that of the outer peripheral plane 20a of the bearing pressurizing part of the lower mounting plate 14, and the inner peripheral plane 8a of the pulley 8 is mounted in shape to cover the outer peripheral plane 20a of the bearing pressurizing part, and the center axis of the bearing 20 and that in the lateral direction of the pulley 8 are arranged so as to be aligned on the same axis. Thereby, no moment is applied to the bearing even when high radial load functions on the pulley by the tension of the belt, which guarantees the long service life of the bearing.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a motor support device for a washing machine that supports a motor.

BACKGROUND OF THE INVENTION As shown in Fig. 3, a conventional dehydrating washing machine has a washing tub and dehydrating tub 2 inside a water tank 1 that stores water during washing, and this washing tub and dehydrating tub 2 has a central inner bottom that stores clothes. A pulsator 3 for stirring is provided, and a large number of small holes 1Q for draining water are provided on the side wall.

The bearing box 5 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 tub and dewatering tub 2 during dehydration. Further, the motor 6 transmits driving force to the box 6 through a bearing and a belt 7 and a pulley 8. The reinforcing plate 4 is provided with a water tank 1, a motor 6, a bearing box 5, etc., and is suspended from a corner of the main body 230 via a support rod 9, a suspension 12, and a spherical seat 13. The balancer 11 is provided above the washing tub and dehydration 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, especially the 2f vibration peculiar to a single-phase induction motor, is transmitted to the water tank 1. The vibrations were directly transmitted to the washing and dehydrating tank 2, and the vibrations were amplified in the water tank 1 and the washing and dehydrating tank 2, producing loud noise. In particular, these noises are becoming a major issue in the market, especially recently as more and more housewives become employed and are doing more laundry at night.

In order to solve this problem, as shown in FIG. 4, an elastic support 16 made of an elastic body is sandwiched between the upper and lower parts of the motor 6 and the lower mounting plate 14 and the upper mounting plate 15 of the motor 6. A hollow pulley shaft 19 is rotatably provided in the center of the lower mounting plate 14I75 via a bearing 20, and the pulley 8 is fixed to this hollow pulley shaft 19, and the hollow pulley shaft 19 and the motor's 4116 a & elastic cup are connected. A motor support device with a vibration-proof structure connected by a ring 18 has been proposed.

However, in this structure, since the pulley 8 is supported by one bearing 20, when the tension of the belt 7 is high, the moment acting on the bearing 20 becomes large, and the life of the bearing 20 is significantly shortened. there were.

The present invention solves these problems and aims to provide a quiet washing machine with stable quality and guaranteed bearing life.

Means for Solving the Problems In order to achieve the above object, the present invention arranges the horizontal central axes of the bearing and the pulley on the same axis.

If the bearing and pulley are laterally arranged on the same axis, no moment will act on the bearing even if a large radial load acts on the pulley when the belt tension is high.゛Embodiment Hereinafter, one embodiment of the motor support device for a washing machine according to the present invention will be explained with reference to FIGS. 1 and 2. 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.

In the figure, an elastic support 16 having a hollow cylindrical shape is fitted and supported at its inner circumferential surface into the bearing portion 6b of the motor 6 and at its outer circumferential surface into the lower mounting plate 14. Similarly, an elastic support 16 is fitted into the upper mounting plate 15, and the motor 6 is mounted between the lower mounting plate 14 and the upper mounting plate 15.
It is held in between by 6.

The bearing 2o is press-fitted and fixed approximately at the center of the lower mounting plate 14, and the pulley shaft 19 is fixed to the inner peripheral surface of the bearing 2o. A pulley 8 is fitted and screwed into the lower part of the pulley shaft 19, and the diameter of the inner peripheral surface 8a of this pulley 8 is equal to the diameter of the lower mounting plate 1.
The outer circumferential surface 20 of the bearing press-fitted part 4 is larger than the diameter of the bearing press-fitted part 20a, and the inner circumferential surface 8a of the pulley 8 is
The bearing 20 and the pulley 8 are arranged so that their horizontal center axes are located on the same axis.

The elastic coupling 18 connects the pulley shaft 19 and the motor shaft 6a via a pulley bearing 21 and a motor bearing 22. This elastic coupling 18 is connected to the bearing 2
Positioned between 0 and motor 6, 9 transmits the rotational force of motor 6 to pulley 8.

The lower mounting plate 14 and the upper mounting plate 15 are screwed and fixed to the reinforcing plate 4 with B)V), and the pulley 8 and the bearing J ring 20.
The pulley shaft 19, the elastic compression ring 18, the elastic support 16, and the motor 6 are arranged almost coaxially.

Note that although a bearing is used as the bearing in this embodiment, a sliding bearing may also be used.

Effects of the Invention As is clear from the above description of the embodiments, according to the motor support device for a washing machine of the present invention, even if the motor is vibration-proofly supported using an elastic body and the pulley is supported with a single bearing, Since the bearing and pulley are on the same axis in the lateral direction, no moment is applied to the bearing even if a large radial load is applied to the belt tension or pulley, ensuring a long bearing life and stable quality. This has the great effect of making it possible to create a washing machine that is quiet and quiet.

[Brief explanation of drawings]

Fig. 1 is a longitudinal cross-sectional view of a motor vibration isolating support device for a washing machine showing an embodiment of the present invention, Fig. 2 is an exploded perspective view of the coupling section, and Fig. 3 shows the structure of a conventional washing machine. FIG. 4 is a longitudinal sectional view of the motor vibration isolation support structure. 6...Motor, 6a...Motor shaft, 7
...Belt, 8...Pulley, 14...
...Lower mounting plate, 15...Upper mounting plate, 16...
... Elastic support body, 18 ... Elastic coupling, 19 ... Pulley shaft, 20 ... Bearing. Name of agent: Patent attorney Shigetaka Awano and 1 other person C-
--f-9 CG-(-9 axis'l-'i'le L 1) Pestle on bamboo (Kai+g-51) P?spring 7'' 19-----Free vehicle weight Figure 3 4 Figure

Claims (1)

[Claims] An elastic support made of an elastic body is sandwiched between the upper and lower parts of the motor and a lower mounting plate and an upper mounting plate of the motor, and a pulley shaft is rotatably mounted via a bearing approximately in the center of the lower mounting plate. a washing machine, wherein a pulley is fixed to the pulley shaft, the motor shaft and the pulley shaft are connected by an elastic coupling made of an elastic body, and the horizontal center axis of the bearing and the pulley are arranged on the same axis. motor support device.