JPH11114282A - Pulley for shaft assembly of washing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a shaft pulley wherein not only vibrations are prevented from being transmitted from a motor pulley to a shaft assembly by allowing the vibrations to be absorbed but also noises are not produced during the operation of a washing machine. SOLUTION: The shaft pulley 30 consists of a disk-shaped inside pulley 31b, an annular outside pulley 31b, and a vibration absorbing member 33 interposed between the pulley 31a and the pulley 31b. The member 33 is firmly mounted between the pulley 31b and the pulley 31a to absorb the vibration and impact exerted on the pulley 30. Thus damage to the shaft pulley 30 due to the impact exerted thereon can be avoided and noises are not produced during the operation of a washing machine.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pulley used in a shaft assembly for a washing machine, and more particularly, to a pulley having a vibration absorbing member capable of absorbing vibration and preventing noise and breakage.

[0002]

2. Description of the Related Art As shown in FIGS. 1 and 2, a general washing machine includes a large number of suspensions 1 in an outer casing 1. As shown in FIG.
A washing tub 4 supported by the washing tub 5, a dewatering tub 5 accommodated in the washing tub 4, a pulsator 6 installed in the dewatering tub 5, a motor 7 installed on the bottom surface of the dewatering tub 5, and a motor 7 is provided with a power transmission device 20 for transmitting the power of the pulsator 7 to the pulsator 6 and the dewatering tank 5.

A power transmission device 20 includes a motor pulley 7 b rotated by the motor 7, and a pulsator 6
, A shaft pulley 11 connected to the shaft assembly 8,
And a belt 7a connecting the shaft pulley 11 and the motor pulley 7b. The motor pulley 7b is installed on the shaft 7c of the motor 7, and the shaft pulley 11 is installed on the input shaft 16 of the shaft assembly 8. The shaft pulley 11 is fixed to the input shaft 16 by a fixing member such as a nut 13.

[0004] A top cover 2 is provided above the outer casing 1, and a water supply device 3 for supplying washing water into the washing tub 4 and the dewatering tub 5 is provided above the washing tub 4. At the lower part of the washing tub 4, a drainage device 9 for draining water in the washing tub 4 and the dehydrating tub 5 after washing is installed.

When the washing machine starts operating, washing water is supplied into the washing tub 4 and the dewatering tub 5 through the water supply device 3,
When the water supply is completed, the motor 7 starts operating. The torque of the motor 7 is transmitted to the shaft assembly 8 via the belt 7a, and the shaft assembly 8 rotates the pulsator 6. The rotation of the pulsator 6 generates a rotating water flow in the dewatering tub 5, and the laundry in the dewatering tub 5 is washed by the rotating water flow.

When the washing operation is completed, the washing water contained in the dewatering tub 5 is drained to the outside through a dewatering hole 5a formed in the side surface of the dewatering tub 5 and a drainage device 9. When drainage is completed, the dehydration operation starts.

When the spinning operation is started, the motor 7 rotates at a high speed, and the shaft assembly 8 simultaneously transmits the torque of the motor 7 to the pulsator 6 and the spinning tub 5. As a result, the dewatering tub 5 and the pulsator 6 rotate at high speed, and the centrifugal force generated at this time causes the laundry to be dewatered.

However, in the above-described conventional washing machine, there is a problem that the vibration generated when the motor 7 is operated is transmitted to the shaft pulley 11 through the belt 7a, and the vibration of the washing machine is increased. Also, the motor pulley 7
When the shaft b and the shaft pulley 11 are displaced from each other, the friction between the belt 7a and the shaft pulley 11 causes
There is a problem that noise is generated between the belt 7a and the shaft pulley 11.

[0009]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems.
It is an object of the present invention to provide a shaft pulley that does not generate noise during operation of a washing machine, in addition to preventing transmission of vibration from a motor pulley to a shaft assembly by absorbing vibration.

[0010]

SUMMARY OF THE INVENTION According to the present invention, there is provided a shaft pulley used for a washing machine shaft assembly, comprising: an inner pulley fixed to a shaft of the shaft assembly; ,
An outer pulley connected to a motor pulley by a belt; and a vibration absorbing member that couples the inner pulley with the outer pulley and absorbs vibration applied to the outer pulley to prevent the vibration from being transmitted to the inner pulley. The shaft pulley is characterized in that:

Here, the vibration-absorbing member is formed of a flexible material, and can reduce the vibration caused by the displacement of the belt driving the shaft pulley.

It is preferable that a number of grooves are formed on the outer side of the inner pulley and on the inner side of the outer pulley in the direction of the plate surface. Thereby, the rotational force of the outer pulley by the belt is effectively transmitted to the inner pulley. The vibration absorbing member is made of urethane or rubber.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the accompanying drawings. 1 and 2 are denoted by the same reference numerals as those in FIGS. 1 and 2 and quoted.

FIG. 3 is a longitudinal sectional view of a shaft pulley according to the present invention, and FIG. 4 is a plan view of FIG. The shaft pulley 30 according to the present invention includes a disk-shaped inner pulley 31a, an annular outer pulley 31b, and a vibration absorbing member 33. The inner pulley 31a has a shaft assembly 8
An insertion hole 37 into which the input shaft 16 is inserted is formed. The outer pulley 31b is arranged outside the inner pulley 31a. The outer pulley 31b is connected to the motor pulley 7b by a belt 7a.

The vibration absorbing member 33 is inserted between the outside of the inner pulley 31a and the inside of the outer pulley 31b, and is firmly attached to the inner pulley 31a and the outer pulley 31b. The vibration absorbing member 33 functions to absorb the vibration applied to the outer pulley 31b and prevent the vibration from being transmitted to the inner pulley 31a. The vibration absorbing member 33 is made of a material having elasticity and flexibility, and in particular, is desirably made of urethane or rubber.

Outer and outer pulleys 3 of inner pulley 31a
Many grooves 35 are formed inside 1b. The vibration absorbing member 33 is formed so as to be aligned with the plurality of grooves 35.
Since the vibration-absorbing member 33 is inserted into and connected to the plurality of grooves 35, the outer pulley 31b is removed from the belt 7a during operation of the washing machine.
Is effectively transmitted to the inner pulley 31a.

The shock and vibration applied to the shaft pulley 30 are absorbed by the vibration absorbing member 33. Therefore, the motor 7
The vibration generated during the rotation of is attenuated by the vibration absorbing member 33, and no noise is generated. In addition, even if the motor pulley 7b and the shaft pulley 30 are displaced from each other and the belt 7a is
No noise is generated between the shaft and the shaft pulley 30.

[0018]

As described above, according to the present invention,
It is possible to provide a shaft assembly pulley in which transmission of vibration to the shaft assembly is prevented and noise is not generated. As described above, the present invention has been specifically described based on the preferred embodiments. However, the present invention is not limited thereto, and it is needless to say that modifications and improvements can be made without departing from the gist of the present invention. It is.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a general washing machine.

FIG. 2 is an enlarged side view of the shaft assembly of FIG. 1;

FIG. 3 is a longitudinal sectional view of a shaft pulley according to the present invention.

FIG. 4 is a plan view of FIG. 3;

[Explanation of symbols]

 7 Motor 7a Belt 7b Motor Pulley 8 Shaft Assembly 16 Input Shaft 30 Shaft Pulley 31a Inner Pulley 31b Outer Pulley 33 Vibration Absorbing Member 35 Groove 37 Insertion Hole

Claims (5)

[Claims] 1. A shaft pulley used in a shaft assembly for a washing machine, comprising: an inner pulley fixed to a shaft of the shaft assembly;
An outer pulley disposed outside the inner pulley and connected to a motor pulley by a belt; and coupling the inner pulley with the outer pulley and absorbing vibration applied to the outer pulley to cause the vibration to be transmitted to the inner pulley. A shaft pulley comprising: a vibration absorbing member that prevents transmission. 2. The shaft pulley according to claim 1, wherein the vibration absorbing member is formed of a flexible material. 3. A large number of grooves are formed on the outer side of the inner pulley and on the inner side of the outer pulley in a plate surface direction.
The shaft pulley according to claim 1, wherein the vibration absorbing member is formed to be aligned with the plurality of grooves. 4. The shaft pulley according to claim 1, wherein the vibration absorbing member is made of urethane. 5. The shaft pulley according to claim 1, wherein the vibration absorbing member is made of rubber.