JPH0350559B2 - - Google Patents

Description

[Detailed description of the invention] Industrial applications This invention relates to an electric washing machine.

Construction of conventional examples and their problems In recent years, the demands on the washing performance of electric washing machines have increased more and more, and there is a strong demand for machines that do not damage or tangle the fabric, as well as increase their detergency.
In order to meet this demand, there is an increasing need to drive large rotary blades at low speeds. In conventional belt reduction systems, low-speed rotation is achieved by reducing the diameter of the drive pulley and increasing the diameter of the impeller pulley, but due to restrictions on the distance between the motor and impeller pulley, the transmission horsepower The problem was that the

OBJECT OF THE INVENTION An object of the present invention is to provide an electric washing machine that has a compact configuration and can drive rotor blades to rotate at low speed with a large transmission torque.

Structure of the Invention In the electric washing machine of the present invention, rotary blades are connected to the inner end of the washing tub of a rotating shaft penetrating the washing tub, with their shaft centers aligned, and grooves extending in the axial direction of the cylinder are formed on the outer circumferential surface in the circumferential direction. A plurality of cylindrical bodies formed in parallel are fitted onto the outer end of the washing tub of the rotating shaft, and a cylindrical elastic body is fitted onto the outer periphery of the cylindrical body in an elastically crimped state, and the outer end of the washing tub of the rotating shaft is fitted. A plurality of grooves extending in the axial direction are formed in parallel in the circumferential direction on the inner peripheral surface of the bearing hole in the center of the wheel, which has a cylindrical flange portion along the outer periphery, and the bearing hole is formed in the outer periphery of the cylindrical elastic body. The output shaft of the motor is placed inside the cylindrical flange of the wheel and parallel to the side of the rotating shaft, and the rotating body for power transmission attached to the output shaft is mounted on the cylindrical flange of the wheel. It is pressed against the inner circumferential surface of the flange part of The transmitted torque enables the rotor to rotate at low speed, and the cylindrical elastic body absorbs noise and vibrations generated at the joint between the wheel flange and the power transmission rotor, allowing the rotor to pass from the rotary shaft to the rotor. prevent it from being transmitted. DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described with reference to FIGS. 1 and 2. In the figure, 1 is the outer frame, 2
is a washing tub, and has a rotary blade 4 on the bottom surface of which rotatably supports a rotary shaft 5 through a bearing 3. The lower end of the rotating shaft 5 protrudes downward from the bearing 3, and a cylinder 10 is fixed to the protruding portion by screws 14 or the like. A plurality of axially extending grooves 13 are formed in parallel in the circumferential direction on the outer circumference of the cylindrical body 10, and convex portions 15 are formed on the inner circumference of the cylindrical elastic body 11 in correspondence with the grooves 13. The elastic body 11 is loosely fitted onto the outer circumferential portion of the cylindrical body 10, and the convex portion 15 is loosely press-fitted into the groove 13. The connection between the elastic body 11 and the internal gear 9 is similar, and a plurality of grooves 12 extending in the axial direction are formed in parallel in the circumferential direction on the inner peripheral surface of the bearing hole provided in the center of the internal gear 9. A convex portion 16 formed on the outer periphery of the elastic body 11 corresponding to the above-mentioned groove 12
Loosely press fit. In this way, the rotating shaft 5 is fitted through the bearing hole of the internal gear 9. Note that convex portions 15 and 16 provided on the inner and outer circumferential surfaces of the elastic body 11, respectively.
are not necessarily necessary; in other words, the restoring force of the elastic body 11 forms part of the inner and outer circumferential surfaces of the grooves 13 and 12.
It is also possible to prevent slipping by digging into the hole. 7
is a motor, which is fixed to the underframe 6 on the bottom of the outer frame 1. The output shaft 7a of this motor 7 is arranged parallel to the side of the rotating shaft 5 inside the outer circumference of the internal gear 9, and the pinion 8 attached to this output shaft 7a is connected to the internal gear 9.
The teeth 9a are engaged with each other.

The operation of this electric washing machine is such that when the motor 7 is driven to rotate, the internal gear 9 is rotated via the pinion 8, and accordingly, the rotating shaft 5 is rotated via the elastic body 11, and the rotor blades 4 are driven to rotate. be done.

In this way, since the rotational force of the motor 7 is transmitted to the rotary blade 4 via the pinion 8 and the internal gear 9, the distance A between the output shaft 7a of the motor 7 and the rotary shaft 5 can be set small. That is, the rotor blade 4 can be driven to rotate at a low speed with a compact configuration and a large transmission torque. Furthermore, since it is not a conventional belt drive system, almost no surface pressure is generated on the bearing 3. Moreover, since the elastic body 11 is press-fitted between the cylindrical body 10 and the internal gear 9, the meshing sound and vibrations between the pinion 8 and the internal gear 9 during rotational driving are absorbed by the elastic body 11, and the rotating shaft 5 to the rotor blade 4, and noise generation can also be prevented.

Note that instead of the internal gear 9, a wheel having a cylindrical flange portion along the outer periphery is used, and in place of the pinion 8, a power transmission rotating body is used, and this rotating body is connected to the cylindrical flange portion. It may also be in pressure contact with the inner circumferential surface.

Effects of the Invention According to the electric washing machine of the present invention, the rotor blade can be driven to rotate at low speed with a compact configuration and a large transmission torque, and almost no surface pressure is generated on the bearing, and noise and vibration are also prevented. You can get the effect that you can.

[Brief explanation of drawings]

FIG. 1 is a cross-sectional view of an embodiment of the present invention, and FIG. 2 is an enlarged cross-sectional view of the main part thereof. 2... Washing tub, 4... Rotating blade, 5... Rotating shaft, 7... Motor, 7a... Output shaft, 8... Pinion, 9... Internal gear, 10... Cylindrical body, 11... Elastic body.

Claims (1)

[Claims] 1. A washing tub, a rotating shaft penetrating the washing tub,
A rotary blade is connected to the inner end of the washing tub of the rotating shaft with its axis aligned, and a plurality of grooves extending in the direction of the cylinder axis are formed in parallel on the outer peripheral surface in the circumferential direction. A cylindrical body fitted onto the outside, a cylindrical elastic body fitted onto the outer periphery of the cylindrical body in an elastically crimped state, and a cylindrical flange portion along the outer periphery and a bearing hole in the center. A wheel in which a plurality of axially extending grooves are formed in parallel in the circumferential direction on the inner peripheral surface of the bearing hole, and the bearing hole is fitted onto the outer peripheral part of the cylindrical elastic body in an elastically crimped state, and an output shaft is attached to the outer peripheral part of the wheel. a motor disposed in parallel to the side of the rotating shaft inside the
An electric washing machine comprising: a rotating body for power transmission attached to the output shaft of the motor and pressed against the inner circumferential surface of the flange portion of the wheel.