JPS6119280B2 - - Google Patents

Description

Detailed Description of the Invention The present invention relates to a dehydrating washing machine, and by improving the structure and mounting structure of an oil seal that watertightly partitions the dehydrating shaft and the bottom of the outer tank, a reliable seal can be achieved. At the same time, the oil seal can be easily replaced.

Embodiments of the present invention will be described below with reference to the accompanying drawings. In the figure, 1 is the main body of the dehydrating washing machine, 2
This is a washing and dehydrating tank having a large number of dehydrating holes 3 on the side wall, a rotary blade 4 is provided at the center of the bottom, and a balance weight 5 is fixed to the opening at the top end. 6 is an outer tank in which the washing/drying tank 2 is rotatably installed;
Reference numeral 7 denotes a washing shaft with the rotary blade 4 fixed to its upper end, 8 a coupling fixed to the bottom of the washing and dehydrating tub 2, and 9 a hollow dehydrating shaft attached to the coupling 8, which connects the washing and dehydrating tub. 2 is rotated.

Reference numeral 10 denotes a bottom plate that is attached to the bottom of the outer tank 6 and is open at the center. A hemispherical seat 11 is formed on the outer periphery of the bottom plate 10, and a spherical body 12 is rotatably mounted on this seat 11. I support it. 13 is an upper support fitting fixed to the upper four corners of the main body 1;
It has a hemispherical seat 14, and a spherical body 15 is rotatably supported on this seat 14, and the upper end of a rod 16 is inserted and fixed into this spherical body 15. Also Rod 1
The lower part of the rod 16 is inserted into the spherical body 12 of the bottom plate 10 so as to be vertically movable, and a spring 18 is interposed between the receiving part 17 provided at the lower end of the rod 16 and the spherical body 12. There is.

Reference numeral 19 denotes an upper ball bearing housing whose outer periphery is attached to the lower surface of the bottom plate 10 with bolts 20 and nuts 21, and this upper ball bearing housing 19 has an upper ball bearing 22 that pivotally supports the dewatering shaft 9 at its inner periphery. The inner peripheral portion further extends upward to form a holding portion 23, and this holding portion 23 holds an oil seal 24 that watertightly partitions the dewatering shaft 9 and the bottom of the outer tank 6. . 25 is the upper ball bearing housing 19 with the outer periphery of the bolt 20 and the nut 2.
1, the lower ball bearing housing 25 holds a lower ball bearing 26 that pivotally supports the dewatering shaft 9 at its inner peripheral portion. Further, an oil seal 27 for holding the washing shaft 7, an upper bearing metal 28, and a lower bearing metal 29 are press-fitted into the hollow portion of the dewatering shaft 9 and fixed thereto.

A washing pulley 30 is attached to the lower end of the washing shaft 7 with a pin 31.
is rotationally driven by a motor 32 fixed to the lower side of the bottom plate 10 via a motor booley 33 and a belt 34. 35 is a helical clutch spring wound between the outer periphery of the boss portion 30' of the washing booley 30 and the lower end outer periphery of the dewatering shaft 9;
A claw 36 at the lower end of this clutch spring 35
is engaged with a cylindrical operating barrel 38 having a large number of teeth 37 on its outer periphery. 39 is a lever receiver attached to the side wall of the lower ball bearing housing 25;
A clutch lever 41 is rotatably attached to the lever receiver 39 via a lever pin 40, and a clutch pawl 42 that engages and disengages from the teeth 37 of the operation barrel 38 is provided at the tip of the clutch lever 41. Reference numeral 43 denotes a brake wheel located within the lower ball bearing housing 25 and fixed to the dewatering shaft 9. The braking mechanism related to this brake wheel 43 is omitted because it has the same structure as the conventionally known structure.
Further, the side wall of the lower ball bearing housing 25 is provided with an opening 25a for attaching a brake mechanism.

To explain the operation in the above configuration, during washing, the motor tab 32 is driven by the motor 32.
3, belt 34, washing booley 30, washing shaft 7,
The rotary blades 4 are rotated through the rotary blades 4 to hold the washing liquid in the outer tub 6, and the laundry placed in the washing/dehydration tank 2 is washed with the water flow generated by the rotation of the rotary blades 4.
In this case, the clutch spring 35 is loosened by engaging the clutch claw 42 of the clutch lever 41 with the teeth 37 of the operation tube 38, so the rotation of the washing booley 30 is not transmitted to the spindle 9, and therefore The washing and dehydrating tank 2 is stopped. Also, during dehydration, the clutch lever 4
1 clutch mechanism claw 42 to the teeth 37 of the operation barrel 38.
By further disengaging the clutch spring 35, the clutch spring 35 is tightened, so that the washing boley 30
The rotation is transmitted to the washing and dehydrating tub 2 via the dehydrating shaft 9, and the laundry is dehydrated by centrifugal force.

The bottom plate 10 and the bottom of the outer tank 6 are fixed by screws 45 into bosses 44 formed on the lower center surface of the outer tank 11 at positions close to the central opening of the bottom plate 10. Also, the boss 4 of the outer tank 6
The upper ball bearing housing 19 and the lower ball bearing housing 25 are fixed in advance with screws 47, and this integrated structure is attached to the bottom plate 10 with bolts 20 and nuts 21. Fix it.

Further, the holding portion 2 of the upper ball bearing housing 19
The oil seal 24 is press-fitted into the dewatering shaft 3 from above and partitions the dewatering shaft 9 and the bottom of the outer tank 6 in a watertight manner.
A main lip 48 that seals the dewatering shaft 9, an auxiliary lip 49 located below the main lip 48 to receive grease, and a dust lip 50 located above the main lip 48 to prevent foreign matter such as sand from entering are integrated. At the same time, a flange 51 protruding outward from the upper end of the oil seal holding portion 23 is integrally formed, and a double seal lip 52 having a V-shaped cross section is provided above the flange 51. It is pressed against the flat part 46 of the outer tank 6 to perform sealing.

Because of the above configuration, the outer circumference of the upper ball bearing housing 19 is connected to the lower ball bearing housing 25.
By fixing the same to the bottom plate 10, the seal lip 52 is brought into pressure contact with the upper end of the oil seal holding portion 23 via the flange 51 of the oil seal 24 against the flat portion 46 formed inside the boss 44 of the outer tank 6. As a result, the water in the outer tank 6 is reliably sealed by the seal lip 52. That is, since the bottom plate 10 is fixed to the boss 44 of the outer tank 6 near the flat part 46 by the screws 45, the flat part 46 of the outer tank 6 is not easily deformed, and the height dimension is also stable. Further, since the height of the upper end of the oil seal holding portion 23 of the upper ball bearing housing 19 and the outer circumferential bolted portion are also integrated, it is stable. Moreover, by fixing to the bottom plate 10, the upper end of the oil seal holding part 23 and the flat part 46 of the outer tank 6
The dimension between the two is also stable. For this reason, the flange 51 provided on the upper end of the oil seal holding portion 23,
The tightening margin of the seal lip 52 is also stable and a reliable seal can be achieved.

In addition, since the seal lip 52 is inclined in a V-shaped cross section, force is applied outward by water pressure.
The sealing lip 52 deforms outward, increasing the contact pressure with the sealing surface and increasing the sealing effect. Furthermore, since the oil seal 24 has a main lip 48, an auxiliary lip 49, a dust lip 50, a flange 51, and a seal lip 52 that are integrally formed, its structure is simple, and when it is press-fitted into the oil seal holding part 23, the oil If the flange 51 is press-fitted until it touches the upper end of the seal holding portion 23, the height of the seal lip 52 will be stabilized. Furthermore, the upper and lower ball bearing housings 19 and 25 are fixed in advance, and this integrated body is attached to the bottom plate 10.
By fixing the sealing lip 52 to the flat surface 46 of the outer tank 6, the sealing lip 52 can be easily sealed. Furthermore, since the oil seal 24 is press-fitted into an oil seal holding portion 23 integrally formed with the upper ball bearing housing 19, when replacing the oil seal 24,
By simply removing the upper and lower ball bearing housings 19, 25 from the bottom plate 10, the oil seal 24 can be pulled out downward together with the upper and lower ball bearing housings 19, 25, so that the oil seal 24 can be easily replaced. Further, since the dust strip 50 is tilted and abuts against the dewatering shaft 9, the water pressure increases the contact pressure of the sealing surface of the dust strip 50, thereby enhancing the sealing effect. Conventionally, the outer peripheral part of the oil seal is fixed to the center of the bottom of the outer tank 6, and the center part is brought into sliding contact with the dehydration shaft 9, and the outer peripheral part is located below the oil seal and attached to the bottom plate 10. Fixed and centered with upper ball bearing 22
Since an upper ball bearing housing 19 was installed to hold the oil seal, when replacing the oil seal, the upper and lower ball bearing housings 19 and 25 must first be removed from the bottom plate 10, and then the bottom plate 10 must be removed from the outer tank 6. However, the replacement work was very time consuming.

As is clear from the above embodiments, according to the present invention, since the oil seal that watertightly partitions the dewatering shaft and the bottom of the outer tank has the above-described structure, a reliable seal can be obtained. In addition, since the oil seal holding part is integrally formed with the upper ball bearing housing, the oil seal can be easily replaced without removing the bottom plate from the outer tank as in the conventional case. Service quality can also be further improved.
Further, since the dust lip and the seal lip are inclined so that the contact pressure with the sealing surface is increased by water pressure, the sealing effect can be further enhanced.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal cross-sectional view of a dehydrating washing machine according to an embodiment of the present invention, FIG. 2 is an enlarged cross-sectional view of the same main part, and FIG. 3 is a perspective view of the main part of an upper ball bearing housing. 2...Washing/dehydration tank, 4...Rotary blade, 6...Outer tank, 9...Dehydration shaft, 10...Bottom plate, 19...Upper ball bearing housing, 22...Upper ball bearing, 23...
...Holding portion, 24...Oil seal, 48...Main lip, 49...Auxiliary lip, 50...Dust lip, 51...Flange, 52...Seal lip.

Claims (1)

[Claims] 1. An outer tank rotatably containing a washing and dehydrating tank;
The outer tank includes a bottom plate that is attached to the bottom of the outer tank and has an opening in the center, and an upper ball bearing housing that is attached to the bottom plate and holds an upper ball bearing that pivotally supports the dehydration shaft. The oil seal that is held and watertightly partitions the dehydration shaft and the bottom of the outer tank includes a main lip that seals the dehydration shaft, an auxiliary lip located below this main lip to receive grease, and an auxiliary lip located above the main lip. A dust strip is integrally formed to prevent the intrusion of foreign substances such as sand, and a flange is integrally formed that protrudes outward from the upper end of the oil seal holding part. A dehydrating washing machine in which a seal lip is formed in contact with each other, and the dust lip and the seal lip are inclined so that the contact pressure with the seal surface is greater than the water pressure. 2. The bottom part and the bottom part of the outer tank are fixed at a position close to the central opening of the bottom plate, and the seal lip is slidably connected to the center of the bottom part of the outer tank by fixing the outer circumferential part of the ball bearing housing to the bottom plate. A dehydrating washing machine according to claim 1.