JPH0246861Y2 - - Google Patents

Description

[Detailed description of the invention] (a) Industrial application field This invention relates to an improvement of the power transmission mechanism of a dehydrating washing machine.

(b) Conventional technology In the case of a dehydrating washing machine, a single motor rotates the rotary blades in the dehydrating washing tub in forward and reverse directions during washing, and during dewatering, the rotary blades and the rotating blades are connected to the dehydrating washing tub by connecting a clutch spring. It is configured to rotate. (Disclosed in Utility Model Publication No. 56-43274) During washing, only the rotary blades rotate in the forward and reverse directions in the dehydrating washing tub to achieve efficient washing, but if the clutch spring does not operate properly, dehydrating Power is transmitted to the shaft and the dehydrating washing tub rotates along with it. Of course, there is also a band brake that fixes the dehydration shaft so that it does not rotate during washing, but it is difficult to perfect a structure that fixes it in both rotational directions. A very complex structure was required to prevent the shaft from rotating.

In other words, in order to operate only the rotary blades during washing and perform efficient washing operations, extremely precise clutch springs and brakes are required.
However, even if it could be obtained, it would take time and effort to manufacture it, and the cost would be high.

(c) Problems that the invention aims to solve This invention was made in view of the above points, and even if the clutch spring and brake described above do not have high precision, rotation of the dehydrating washing tub will occur during the washing operation. The present invention provides a power transmission mechanism for a dehydrating washing machine that is easy to manufacture and inexpensive.

(d) Means for solving the problem In this invention, the bearing part of the dual power transmission shaft consisting of the blade shaft and the dehydration shaft is configured as a one-way clutch. It has a double structure, with the wing shaft located on the inside where the washing machine is attached, and the dehydrating shaft located on the outside where the dehydrating washing tub is installed on the top.Power is transmitted from the motor to the wing shaft at the bottom, and when washing is done, the blade shaft is A double power transmission shaft is installed in a vertical direction and is pivotally supported at the bottom of the dehydrating washing tub. In the power transmission mechanism of a dehydrating washing machine, a one-way clutch transmits power by rotating a bearing part that pivotally supports a dual power transmission shaft so that the dehydrating shaft rotates only in the dehydrating rotation direction and prevents rotation in the reverse rotation direction. This is a power transmission mechanism for a dehydrating washing machine characterized by the following configuration.

(E) Function Even if a force is applied to the dehydration shaft during washing in a direction opposite to the dehydration rotation direction, the rotation is prevented by the action of the one-way clutch, and the dehydration washing tub does not rotate.

(f) Examples Examples of this invention will be described in detail below with reference to the drawings, but this invention is not limited to the following examples.

Reference numeral 1 denotes a cylindrical dewatering shaft with a bottom boss 4 of a dehydrating washing tub 3 attached to the upper end via a shaft head 2, and a blade shaft 6 with a rotary blade 5 fixed to the upper end is inserted into the shaft 1 through a metal 7. It is pivoted. Reference numeral 8 denotes an outer tank provided around the outer periphery of the dehydration washing tub 3, which is suspended from the machine frame (not shown), and a bearing housing 9, which is attached to the bottom of the outer tank.
The dewatering shaft 1 is supported by bearings 11 and 12 formed inside the dehydration shaft 10. 13 is an annular seal body that seals between the bearing housing 9 and the shaft head 2 and between the bearing housing 9 and the outer tank 8; 14 is a brake wheel fixed to the dewatering shaft 1; Attach the brake to the protruding part 15 at one end of the brake band 15.
By engaging and disengaging the opening 16 of the kill lever 16,
Apply or release the brake on the dehydration shaft 1.

Reference numeral 17 denotes a sheet metal boley fixed to the lower end of the blade shaft 6, which is rotated by a motor (not shown). A metal clutch wheel 18 is integrally fixed, and the clutch wheel 18 is reliably rotated together with the pulley 17, and this clutch wheel 18 is driven by a motor. It is a circle.

A coil-shaped clutch spring 19 is wound between the clutch wheel 18 and the lower end of the dewatering shaft 1, and a ratchet wheel 20 with one end locked is fitted onto the outer periphery of the clutch spring 19. By engaging and disengaging the clutch lever 21 with the pawl of the ratchet wheel 20, the transmission of power to the dewatering shaft 1 is controlled.

Of the bearing parts 11 and 12, the lower bearing part 12 has a one-way clutch configuration. This one-way clutch configuration is a general one in which an actuating body 22 called a sprag of a specific shape is interposed between two surfaces through which power is transmitted, and the actuating body 22 engages only in one direction of rotation to transmit power. (There are commercially distributed items). In this invention, the side of the dehydration shaft 1 located on the outer periphery is integrally fixed with the bearing housing 10, and therefore, in the power transmission state, that is, in the state in which the actuating body 22 is engaged, the dehydration shaft 1 side also stops. do. The rotating direction of the dehydrating shaft 1 at the time of stopping is set to be opposite to the dehydrating rotating direction of the dehydrating shaft 1. When the dehydrating shaft 1 rotates in the dehydrating direction, the actuating body 22 does not engage with the dehydrating shaft 1, so that the dehydrating shaft 1 can freely rotate.

To explain further, the above-mentioned structure prevents the spindle 1 from rotating in the opposite direction to the spindle rotation direction during washing, and the brake band 15 prevents one rotation of the spindle in the spindle rotation direction. This brake band 15 is of course also used to stop the dewatering shaft 1 during dewatering.

The operation of the clutch spring 19 will be briefly explained.

During dehydration, the clutch lever 21 and ratchet wheel 20 are disengaged, and the clutch spring 19 is tightly wound between the clutch wheel 18 and the dehydration shaft 1 due to the rotation of the clutch wheel 18, transmitting power to the dehydration shaft 1. (Of course, at this time, the engagement between the brake lever 16 and the brake band 15 is also disengaged, releasing the brake.) On the other hand, during washing, the clutch lever 21 engages with the ratchet wheel 20, and the clutch spring 19 Wrapping is prevented and power is not transmitted to the dewatering shaft 1.

FIG. 2 shows another embodiment, in which a simple fixed handbrake 23 is used as the braking mechanism. This fixed hand brake 23 is used to stop the spindle 1 during spin-drying, and also to stop the spindle 3 during washing.
The dehydration shaft 1 rotates in the same direction as the dehydration rotation direction of
The dehydration shaft 1 prevents the rotation of the spindle and rotates in the opposite direction during washing.
Rotation is prevented by a one-way clutch mechanism of the bearing portion 10, similar to that of the embodiment described above. If this mechanism is used, clockwise rotation of the brake band is fixed by the locking part of the brake lever, and leftward rotation of the brake band is prevented by the one-way clutch mechanism of the bearing part. There is no play when the brake band is locked, and the collision noise that conventionally occurs at the locking part between the brake lever and the brake band can be suppressed, making it quieter.

In each of the above-mentioned embodiments, only the lower bearing portion is provided with a one-way clutch mechanism, but both may of course be provided with a one-way clutch mechanism.

(g) Effects This device is structured as described above, so
Rotation of the dehydration shaft in the dehydration rotation direction and the reverse rotation direction is prevented, and by using this power transmission mechanism, it is possible to obtain a dehydration washing machine that ensures that only the rotor blades rotate in the forward and reverse directions during washing, and that performs a good washing function. This is particularly effective for items that are frequently turned over during washing.

Furthermore, since a highly accurate clutch spring or brake is not required, manufacturing is easy and inexpensive.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view of an embodiment of this invention, and FIG. 2 is a longitudinal sectional view of another embodiment. DESCRIPTION OF SYMBOLS 1... Dehydration shaft, 3... Dehydration washing tub, 5... Rotating blade, 6... Wing shaft, 11, 12... Bearing part, 19...
...Clutch spring.

Claims (1)

[Scope of utility model registration request] It has a dual structure: an inner blade shaft with rotor blades attached to the upper part, and an outer dehydration shaft with a dehydrating washing tub attached to the upper part. Power is transmitted from the motor to the blade shaft in the lower part. A dual power transmission shaft is pivotally supported at the bottom of the dehydrating washing tub, with only the blade shaft rotating in forward and reverse directions during washing, and the dehydration shaft rotating in the same direction as the blade shaft during dehydration through the connection of a clutch spring. In the power transmission mechanism of a dehydrating washing machine installed vertically, power is applied to the bearing part that pivotally supports the dual power transmission shaft so that the dehydrating shaft rotates only in the dehydrating rotation direction and prevents rotation in the reverse rotation direction. A power transmission mechanism for a dehydrating washing machine characterized by having a one-way clutch configuration.