JPH0111192Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a dehydrating washing machine that automatically reverses the pulsator.The purpose of this invention is that when the pulsator rotates in the opposite direction to the dehydrating rotation direction during washing, the laundry is rotated in the dehydrating and washing tub. The tank collides with the tank, and the resistance generated at this time causes the tank to rotate.In order to prevent this, the mounting structure of the reversal prevention spring was improved, and although it has a simple structure, it has sufficient mounting strength. The present invention aims to provide a dehydrating washing machine that is inexpensive and can reduce assembly man-hours.

Conventionally, in this type of centrifugal dehydrating washing machine, a reversal prevention spring 43 is provided to prevent the dehydrating and washing tubs from rotating together during washing. This spring is attached above the brake wheel which is fixed to the dehydration shaft connected to the dehydration/washing tub, and has a bent part 45 to be fixed to the lower ball bearing housing 16 at only one place with a screw 44 as shown in FIG. had. However, since a large load is applied to this reverse rotation prevention spring 43 to prevent rotation of the dehydrating shaft connected to the dehydrating/washing tub, it sometimes breaks at the bent portion 45 of the screw fixing portion. Furthermore, when installing a spring to prevent reverse rotation in a centrifugal dehydrator with a band brake, if the spring for preventing reverse rotation is damaged, the tub will rotate in the same way as the laundry in the tub during washing, preventing relative movement with the laundry. This had a serious negative effect in that the washing effect was significantly reduced and it became impossible to wash the clothes. In order to improve this drawback, a mounting structure as shown in FIG. 48 is U-shaped and further passes through a pin 49 that is machined to follow the outer diameter of the lower ball bearing housing, and this pin is further fixed with a fixing plate 50 with a holding screw 51, which requires a large number of parts and is expensive. At the same time, since the reverse rotation prevention spring 46 is fixed to the lower ball bearing housing 16, if a sudden large force is applied, the impact cannot be absorbed. There was a drawback that the reverse rotation prevention spring 46 was easily broken.

The present invention eliminates the above-mentioned drawbacks of the conventional technology, and an embodiment thereof will be described below with reference to the drawings.

In FIG. 1, 1 is an outer frame, 2 is a dewatering/washing tub, and a pulsator 3 that automatically turns over during washing is arranged at the center bottom. 4 is a water tank, with a lid 5 on the upper edge.
is detachable. Reference numeral 6 denotes a board fixed to the bottom of the water receiving tank 4, and a board mounting plate 7 is attached to this board 6.
is extended and suspended from the upper part of the outer frame by a support rod 9 via a vibration isolator 8. 10 is a dehydration shaft, and a dehydration/washing tub 2 is connected to the upper end thereof. A washing shaft 11 is installed concentrically with this dehydration shaft, and the pulsator 3 is attached to the upper end of this washing shaft 11. Reference numeral 12 denotes a motor attached to the lower surface of the substrate 6, and its rotational force is transmitted to the dewatering shaft 10 or the washing shaft 11 via a pulley 13 and the like. Reference numeral 14 denotes an upper ball bearing housing, which is attached to the bottom surface of the base plate 6 and has an upper ball bearing 15 in the center thereof for bearing the dehydration shaft 10.
A lower ball bearing housing 16 is attached to the bottom surface of the upper ball bearing housing 14, and a lower ball bearing 17 for bearing the dewatering shaft 10 is provided in the center. 1
8 is a brake wheel, which is fixed to the dehydration shaft 10. Reference numeral 19 denotes a reverse rotation prevention spring, which is located above the brake wheel 18. One end is wound around the dewatering shaft 10 so that the biasing force of the spring is released during rotation in the dewatering direction A, and the other end is wound around the dewatering shaft 10 as shown in FIG. As shown in the figure, it extends over a flange 21 provided at the upper opening edge of the lower ball bearing housing 16, forms a winding part 22, and is folded back.
Insert the pipe-shaped metal fitting 20 into the overlapped necks,
Further, the outermost portion is formed into an L-shaped bent portion 23. Therefore, the pipe-shaped metal fitting 20 is located between the winding portion 22 and the L-shaped bent portion 23. Reference numeral 24 denotes a stepped bolt, which has a large diameter portion 25. The stepped bolt 24 is attached to the lower ball bearing housing 16 by loosely fitting the winding portion 22 of the spring 19 for preventing reverse rotation. 26 is a flat washer, and 27 is a notch that escapes the reverse rotation prevention spring 19 provided in the upper ball bearing housing 14.

1 and 3, a brake band 28 has a brake shoe 29 on its inner surface that comes into contact with the brake wheel 18, and one end is pivotally supported on the lower ball bearing housing 16 by a pin 30.
Reference numeral 31 denotes an auxiliary lever, which is attached to one end of the free end of the brake band 28 and rotatably supported by a pin 32. Reference numeral 33 denotes a brake force biasing spring, one end of which is engaged with the auxiliary lever 31, and constantly biases the brake band 28 in a direction to bring it into close contact with the brake wheel 18 side. Reference numeral 34 denotes a main lever whose center part is supported by a pin 35. One end is connected to a rod 38 of an electromagnet 37 that opens and closes a drain pot 36, and the other end has a clutch spring (not shown) for switching between washing and dewatering. ) A clutch lever 41 is integrally attached with a pawl 40 that engages with a clutch boss 39 containing a clutch boss 39. 42 is a movable adjustment screw attached to the main lever 34, and is in contact with one end of the auxiliary lever 31. In the above configuration, during washing, the laundry is rotated by the rotation of the pulsator 3, but when rotating in one direction, the rotational force is applied to the spin-drying/washing tub 2 due to the movement of the laundry. At this time, since one end of the reverse rotation prevention spring 19 is wound around the dehydration shaft 10 of the dehydration/washing tub 2,
Naturally, a large force is applied to the reverse rotation prevention spring 19 due to the ratio of the diameter of the dewatering/washing tub 2 and the diameter of the dehydrating shaft 10. However, in the present invention, the reversal prevention spring 1
Even if a large force is applied to the stepped bolt 24, the pipe-shaped metal fitting 20 is placed between the winding part 22 and the L-shaped bent part 23, and the winding part 22 is connected to the large diameter part 25 of the stepped bolt 24.
Since it is loosely fitted into the spring 19, even if a large force is suddenly applied in the tightening direction of the anti-reverse spring 19, the impact can be absorbed, and at the same time, the spring can be configured with a simple processing method, and the parts Since the number of parts is small, it is inexpensive and requires less assembly time. Furthermore, the stepped bolt 24 is attached to the flange 21 of the bearing housing 16 from above.
This has great practical effects, such as being able to easily perform automatic tightening, since it is only necessary to tighten the screws. In this embodiment, the stepped bolt 24 is used, and the winding part 22 of the anti-reverse spring 19 is loosely fitted into the large diameter part 25 of the stepped bolt 24, but the pin 32 is used to fit the large diameter part 25 into the large diameter part 25 of the stepped bolt 24. the winding part 2
2 may be fitted loosely and the lower surface of the collar of the upper ball bearing housing 14 may be brought into contact with or close to the upper end surface of the pin 32 to prevent the wound portion 22 from coming off. In other words, the purpose of the present invention can be achieved by loosely fitting the winding portion 22 and preventing the winding portion 22 from coming off.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal cross-sectional view of a dehydrating washing machine showing an embodiment of the present invention, Fig. 2 is an enlarged exploded perspective view showing the installation state of a reverse rotation prevention spring of the same main part, and Fig. 3 is a main part of the same main part. The enlarged cross-sectional view and FIGS. 4 and 5 are perspective views showing how a conventional anti-reverse spring is installed. 2...Dehydration/washing tub, 3...Pulsator, 10
... Dewatering shaft, 16 ... Lower ball bearing housing, 1
9... Spring for preventing reverse rotation, 20... Pipe-shaped metal fitting,
21... Flange portion, 22... Winding portion, 23... L-shaped bent portion, 24... Stepped bolt.

Claims (1)

[Scope of utility model registration request] In a dehydrating washing machine that automatically reverses the pulsator during washing, one end of a reversing prevention spring is wrapped around the dehydrating shaft connected to the dehydrating and washing tub so that the spring bias is released when the pulsator rotates in the dehydrating direction. Extend the other end of the spring, form a winding part, and fold it back.
A pipe-shaped metal fitting is inserted into the overlapping neck parts, an L-shaped bent part is formed at the folded end, and the winding part formed at the end of the extension part is connected to a stepped bolt having a large diameter part. A dehydrating washing machine characterized in that the washing machine is loosely fitted onto a flange provided at the upper opening edge of a lower ball bearing housing.