JPH0320279B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for attaching a spring for preventing reverse rotation of a dehydrating shaft in a dehydrating washing machine.

In FIG. 1 showing the basic configuration of a conventional washing machine, 1 is an outer frame of the washing machine, 2 is a cover that covers the upper opening of the outer frame 1, and 3 is a panel to which electrical components are attached to control the mechanical movement of the washing machine. , 4 is a lid placed in the center of the cover 2 so as to be openable and closable, 5 is a cylindrical water receiver for receiving washing water, 6 is a spin-drying tub and washing tub, and 7 is a spin-drying tub formed on the outer periphery of the washing tub 6. A hole 8 is a pulsator for stirring the laundry and is located at the center bottom of the washing tub 6. Reference numeral 9 denotes a motor that transmits rotational force to a mechanical case 12 with a built-in clutch mechanism via a motor pulley 10 and a V-belt 11, which rotates the pulsator 8 during washing and the spin-drying tub/washing tub 6 during spin-drying. 13 is motor 9, mechanical case 1
These mechanism parts are suspended by a vibration isolator 14, and the vibration isolator 14 is slid onto the upper part of the outer frame 1 through spherical receivers 15 provided at the four corners of the reinforcement plate 13. It is attached via a movably attached rod 16. Reference numeral 17 denotes adjustment legs provided at the four corners of the bottom of the outer frame 1, which are used to adjust so that there is no wobbling when the frame is installed on the floor. 18 is a leg, 19 is a drain valve that has a drain valve installed inside, and when the washing water in the water tray 5 is drained, it is opened and discharged outside the machine; 20 is a drain hose connected to the drain pot 19; 21 A liquid is sealed inside, and when the laundry in the spin-drying tub/washing tub 6 is shifted to one side and dehydrated, the liquid moves to balance the laundry in accordance with the shift. Reference numeral 22 denotes a dewatering tray cover that reinforces the upper opening of the water tray 5.

In FIG. 2 showing the details of the vicinity of the mechanical case 12 in the past, the central axis of the mechanical case 12 is
The dewatering shaft 23 is rotatably held by a bearing 24 provided in a metal case 25 forming the mechanical case 12 and a mechanical case cover 26. The metal case 25 and the mechanical case cover 26 are made of metal and have a concave groove shape, and are fixed to the reinforcing plate 13 with mounting bolts 27 . A flange washer 29 is attached to the dewatering shaft 23 which has a step on the upper part, a disk-shaped shaft flange 28 is placed on the upper part, and a presser plate 30 is attached.
It is fixed with a nut 31 via. A dehydration tub/washing tub 6 is fixed to the outer edge of the shaft flange 28 with a tap pin screw 32. A washing shaft 33 is inserted inside the dehydration shaft 23,
A pulsator 8 is attached to the upper end of this shaft 33. A through-hole is provided in the center of the water receiver 5 to the extent that the upper part of the mechanical case cover 26 can be inserted therein.
It has a waterproof effect. oil seal 34
The upper part of the part that seals the dewatering shaft 23 is covered by a cap 35.

Next, metal case 25 and mechanical case cover 26
The internal configuration of this will be explained in detail.

It has a gear case 36 and a brake wheel 37 which are press-fitted and fixed onto the dewatering shaft 23, and a reduction gear 38 is set to reduce the speed of the washing shaft 33. Since the dehydration shaft 23, gear case 36, and brake wheel 37 are integrated, they rotate at high speed during dehydration.

A band brake 39 is disposed on the outer circumference of the brake wheel 37, and a brake shoe 40 is attached to the inner circumference of the band brake 39, and the brake shoe 40 is released from the brake wheel 37 during dewatering. It is in a non-contact state and comes into contact when stopped. Further, a reverse rotation prevention spring 41 is attached to the dewatering shaft 23 for the purpose of preventing rotation in a direction opposite to the dehydrating rotation direction.

In FIG. 3 showing a conventional brake device, when the electromagnetic magnet 42 attached to the bottom of the water receiver 5 and the reinforcing plate 13 is energized, it attracts the plunger 43 in the direction of arrow A'.
A joint joint 44 is connected by a split pin 45, and a drainage joint 19 is interlocked with the other end.

Then, when the electromagnetic magnet 42 operates, the drain pot 19 opens the valve, and when the electricity is turned off, the valve closes.
There is a stopper 46 in the middle of the joint joint 44.
is provided, and the clutch lever 47 is operated together with the operation of the electromagnetic valve. This clutch lever 4
7 is a clutch lever 4 that rotates around a clutch lever bar 48 and is located on the dehydration shaft 23 side.
An adjustment bolt 49 is provided at a portion 7 and brought into contact with the brake cam 50 to urge the brake cam 50 to rotate in the B direction. Therefore, the distance between the clutch lever 47 and the stopper 46 is adjusted by moving the adjustment bolt 49 back and forth.

The dewatering shaft side of the brake cam 50, which rotates in the direction B around the brake lever bar 51, rotates in the direction C, and at this time, one end of the brake cam 50 and the movable part of one end of the brake band 39 are connected. Therefore, both the brake bands 39 move in the C direction, and the brake shoe 40 is connected to the brake wheel 3.
Release from 7 and make it non-contact.

The other end of the brake band 39 is connected to the metal case 2.
The band brake is fixed by a brake pin 53 to a fixed receiver 52 provided integrally with the band brake 5, and the band brake is turned on and off by opening and closing an electromagnetic magnet.

The brake force is applied by the brake spring 54 to pull the brake cam 50 in the E direction, and at this time, the brake band movable part is applied with force in the opposite direction to the C direction, and the brake wheel 37 is applied by the brake shoe 40.
Hold and perform braking operation.

The clutch lever 47 releases and applies the bias of the clutch spring 55 for switching between washing and dehydration, but since it is necessary to operate the clutch boss 56 which is partially interlocked with this clutch spring 55, the electromagnetic magnet is used during washing. is in the off state, and the clutch pawl 5 at the tip of the clutch lever 47
7 engages the clutch boss 56 and releases the bias of the clutch spring 55.

Next, when dehydrating, turn on the electromagnetic magnet and move it in the D direction to release the clutch spring 5.
Apply the bias of 5. The clutch spring 58 pushes up the clutch lever 47 downward and applies a force in the direction opposite to the D direction, so as to provide a force to reliably push the clutch boss 56 during washing. Figure 4 shows the installation of a conventional anti-reverse spring.
One end of the anti-reverse spring 41 is wound around the dewatering shaft 23, and when rotating in the dehydrating rotation direction G, the anti-reverse spring 41 releases its bias and the dehydrating shaft 23 slides and rotates. However, the dehydration shaft 2 is in the opposite direction to the G direction.
3 rotates, the bias acts to prevent rotation. Further, the other end of the anti-reverse spring 41 extends in the outer circumferential direction, and a circular portion 59 is formed at the end, and the strength of the circular portion 59 is improved by a reinforcing ring 60. A stepped bolt 61 is inserted into the circular portion 59 of the anti-reverse spring 41 from above and tightened into a mounting hole 62 provided in the metal case 25. The purpose of the anti-reversal spring 41 is to prevent the spin-drying tub and washing tub from rotating together during washing, but the tub rotates in the same way as the laundry in the tub during washing, which improves the washing effect. There was a drawback that the performance deteriorated significantly.

The present invention eliminates the above-mentioned conventional drawbacks, and one embodiment thereof will be described in detail below.

In FIG. 5, in order to install the anti-reverse spring 41, the brake lever bar 51 of the brake device provided on the metal case 25 is connected to the collar 63 of the metal case 25 and the brake plate fixed to the metal case 25. 64, and a brake cam 50 is provided in the intermediate portion. Further, the lower part of the brake lever bar 51 is provided with a snap spring 65 as a receiving part, and the upper part is provided with a collar part 66.
is formed to prevent the top and bottom from coming off. A circular portion 59 of the anti-reverse spring 41 is attached between this collar portion 66 and the collar portion 63 of the metal case 25. Therefore, the conventional anti-reverse spring was attached to the metal case 25 using stepped bolts 61 as shown in Fig. 4, but depending on the tightening conditions,
When the shoulder bolt 61 is tilted due to the installation of the stepped bolt at an angle, or due to the deformation of the mounting hole 62 provided in the metal case 25, the anti-reverse spring tilts along this angle, and the dewatering shaft is rotated. On the other hand, the winding part becomes eccentric or causes uneven contact, which causes wear of the dehydration shaft and abnormal contact noise during rotation of dehydration. However, as in this embodiment, since the brake lever bar 51 is used and the brake lever bar 51 is attached to the bar of one main column, no inclination occurs, and the anti-reverse spring 41
It has no negative impact on the. Furthermore, from the perspective of assembly work, conventional methods use stepped bolts, which are special bolts that are expensive, and have an extremely unreasonable structure in terms of tightening man-hours and tightening strength. . However, in the case of this embodiment, by simply making the brake lever bar 51 slightly longer, no number of parts is required, and costs and workability can be reduced.
With an extremely simple configuration, it is possible to ensure superior quality than before.

As described above, the present invention has a dehydrating shaft of a washing machine that automatically reverses the pulsator during washing and rotates the inner tub during dehydration, and a reversal prevention spring is wound around the dehydration shaft so that the bias is released when rotating in the dehydration direction. One end of this reversal prevention spring is locked to a main shaft that operates a brake cam that interlocks with a band brake, thereby increasing the washing effect.

[Brief explanation of the drawing]

Fig. 1 is a sectional view of a dehydrating washing machine, Fig. 2 is a sectional view of a mechanical part of the dehydrating washing machine, Fig. 3 is a top view of the mechanical part, and Fig. 4 is an installation configuration diagram of a conventional reverse rotation prevention spring. , FIG. 5 is an installation configuration diagram of the anti-reverse spring in one embodiment of the present invention. 23... Dehydration shaft, 41... Reverse prevention spring, 51
...Brake lever bar.

Claims (1)

[Claims] 1 A reversal prevention spring whose one end is wound around a dehydration shaft,
A brake wheel formed on a part of the dewatering shaft, a band brake disposed on the outer periphery of the brake wheel, a brake cam for operating the band brake, and a main shaft rotatably supporting the brake cam, A dehydrating washing machine in which the other end of a prevention spring is locked to the main shaft.