JPH0720184U - Clutch switching device for dehydration washing machine - Google Patents

Abstract

(57) [Abstract] [Purpose] Prevents heat generation and abnormal noise that occur when the rotation speed of the spin-drying shaft and the rotation speed of the bearing inner ring that supports the spin-drying shaft are different. The purpose is to achieve [Structure] A dehydration shaft 12 connected to a dehydration and washing tub,
The bearing inner ring 18a for supporting the dehydration shaft 12 and the elastic body 19 inserted into the dehydration shaft 12 are provided.
Makes the lower end abut on the step portion of the connecting portion between the dehydration shaft 12 and the brake wheel 15, and makes the upper end abut on the bearing inner ring 18a. The cross-sectional shape of the elastic body 19 is V-shaped so that the end of the elastic body is in close contact with the bearing inner ring 18a so that the rotation speed of the dehydration shaft 12 and the rotation speed of the bearing inner ring 18a are the same.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a clutch switching device for a dehydration washing machine used in general households, and more particularly to the structure of a dehydration shaft and its bearings.

[0002]

[Prior art]

 The structure of a conventional dehydration washing machine of this type will be described with reference to FIG. In FIG. 2, reference numeral 1 denotes a main body of a washing machine, and a water receiving tank 5 is suspended in the main body 1 of the washing machine via a suspension (not shown). A dewatering / washing tub 5 is rotatably arranged in the water receiving tub 5, and a balancer 3 is attached to the upper part of the dewatering / washing tub 2 to correct an imbalance during dewatering. A clutch switching device 6 and a motor 7 are arranged below the water receiving tank 1. A rotary vane 4 is rotatably arranged on the inner bottom of the dehydration / washing tub 5. A motor-side pulley 8 transmits the rotation of the motor 7 to the clutch switching device-side pulley 9 via the belt 10. Reference numeral 11 is a water supply valve for supplying water into the dehydrating and washing tub 2.

Next, the configuration of the clutch switching device will be described with reference to FIG. The clutch switching device 6 is provided with a dehydration shaft 12 connected to the bottom of the dewatering and washing tub 2 and a washing shaft 13 rotatably arranged in the dehydration shaft 12, and the upper end side of the washing shaft 13 is connected to the rotor 4. It is connected. The lower end side of the washing shaft 13 is connected to the output side of the reduction mechanism 14. The speed reduction mechanism 14 is composed of a planetary gear device and reduces the rotation of the motor side received by the pulley 9 to a rotation speed suitable for the rotation of the rotary blade 4. On the other hand, the lower end side of the dehydration shaft 12 is connected to a brake wheel 15 which encloses a reduction mechanism. A brake band 16 is wound around the brake wheel 15 to apply braking to the rotation of the brake wheel 15. A part of the brake wheel 15 and the dehydration shaft 12 is housed in the mechanical case 17, and a bearing 18 for pivotally supporting the dehydration shaft 12 in a loosely fitted state is attached to the upper part of the mechanical case 17.

[0004]

In the conventional structure as described above, the bearing 18 and the dehydration shaft 12 are in a loose fitting state. Therefore, when the dehydration shaft 12 is rotated at high speed during dehydration, A rotation transmission loss occurs between the inner race 18a and the dehydration shaft 12, and a difference occurs in rotation between the dehydration shaft 12 and the inner race 18a. When the dehydration shaft 12 and the bearing 18 rotate at different speeds in this manner, there is a problem that abnormal noise is generated between the dehydration shaft 12 and the bearing 18 or wear occurs.

The present invention is intended to solve the above problems, and it is an object of the present invention to reduce noise during spin-drying rotation and to improve wear resistance between the spin-drying shaft and the bearing.

[0006]

[Means for Solving the Problems]

 To achieve the above object, the present invention provides a dehydration shaft connected to a dehydration / washing tub, a washing shaft concentrically arranged on an inner diameter portion of the dehydration shaft for rotating a rotary blade, and a dehydration shaft. A bearing that supports the dehydration shaft, and an elastic body is inserted into the dehydration shaft, the upper end of the elastic body contacts the inner ring of the bearing, and the lower end contacts the brake wheel to be in a pressure contact state, and The elastic body has a substantially V-shaped cross section.

[0007]

[Action]

 According to the above configuration, since the elastic body inserted into the dehydration shaft rotates at the same speed as the dehydration shaft, the inner ring of the bearing, which is in pressure contact with the elastic body, also rotates at the same speed as the dehydration shaft. It is possible to prevent the occurrence of a different speed between the dehydration shaft and the bearing at that time.

[0008]

【Example】

 An embodiment of the present invention will be described below with reference to FIG. The same parts as those of the conventional structure are designated by the same reference numerals and the description thereof will be omitted. In the figure, reference numeral 12 denotes a dehydrating shaft, which is inserted into a bearing 18 mounted on the upper portion of the brake wheel 15 in a loosely fitted state. A step portion 15a is formed at a connecting portion between the dehydration shaft 12 and the brake wheel 15, and an elastic body 19 is fitted on the step portion 17a. The elastic body 19 has its lower end abutted on the step portion 15a of the dehydration shaft 12 and its upper end abutted on the lower end portion of the inner ring 18a of the bearing 18. Moreover, the elastic body 19 has a V-shaped cross section, and the upper end of the elastic body 19 is always in contact with the inner ring 18a. As shown in FIG. 2, the elastic body 19 is annularly inserted into the dehydration shaft 12 and is made of a material such as rubber or synthetic resin having elasticity and excellent durability.

Next, the operation of the above configuration will be described. At the time of dehydration, the rotation of the motor 7 is transmitted to the dehydration shaft 12, and the dehydration shaft 12 is rotated at high speed. By the high speed rotation of the dehydration shaft 12, the dehydration and washing tub 2 also rotates at high speed, and the laundry in the dehydration and washing tub 2 is centrifugally dehydrated. At this time, the dehydration shaft 12 and the inner ring 18a of the bearing 18 are in a loose fit state, and rotation transmission loss occurs, but the elastic body 19 in a pressure contact state between the inner ring 18a of the bearing 18 and the brake wheel 15 The rotation of the dewatering shaft 12 is transmitted to the inner ring 18a. Therefore, it is possible to prevent heat generation due to the different speeds of the rotation of the dehydration shaft 12 and the inner ring 18a of the bearing 18 and generation of abnormal noise.

Further, since the elastic body 19 is configured to have a substantially V-shaped cross section, it can have a spring property at the time of pressure contact, and the gap between the dehydration shaft 12 and the bearing 18 varies. Even if the pressure contact state is maintained, it is possible to prevent the bearing 18 from being applied with an excessive radial load. Further, if the tip end of the elastic body 18 is formed in a lip shape so as to be in close contact with the inner diameter chamfered portion 18b of the inner ring 18a of the bearing 18, a radial pressure contact state is obtained, and the rotation transmission effect can be improved.

[0011]

[Effect of device]

 As described above, according to the present invention, since the elastic body inserted into the dehydration shaft is pressed against the bearing inner ring, the bearing inner ring can be rotated at the same speed as the dehydration shaft, and the dehydration shaft and the bearing inner ring can be rotated. It is possible to prevent the generation of heat and abnormal noise due to the different speeds, reduce noise during dehydration, and improve wear resistance.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view of essential parts of a clutch switching device showing an embodiment of the present invention.

FIG. 2 is a side view of an elastic body of a clutch switching device according to an embodiment of the present invention.

FIG. 3 is a vertical sectional view of a dehydration washing machine.

FIG. 4 is a vertical sectional view of a conventional clutch switching device.

[Explanation of symbols]

 12 dehydration shaft 15 brake wheel 17 mechanical case 18 bearing 18a bearing inner ring 19 elastic body

Claims (1)

[Scope of utility model registration request] 1. A dehydration shaft connected to a dehydration and washing tub,
The washing shaft is provided concentrically with the inner diameter portion of the dehydration shaft and has a washing shaft for rotating a rotating blade, and a bearing that loosely fits the dehydration shaft and pivotally supports the dehydration shaft. An elastic body is inserted into the dehydration shaft. Then, the upper end of the elastic body is brought into contact with the bearing inner ring and the lower end is brought into contact with the brake wheel so as to be in a pressure contact state, and the elastic body has a substantially V-shaped cross section.