JPH0241997B2 - - Google Patents

Description

[Detailed description of the invention] (b) Industrial application fields The present invention relates to a washing machine with a pump.

(b) Prior Art An electric motor in which a rotor is movable in the thrust direction is known, for example, from Japanese Patent Publication No. 37-18655.
On the other hand, Japanese Utility Model Application Publication No. 57-169284 (see Figure 4) discloses that the outer tank B and the water storage tank C of a fully automatic washing machine A are connected through a liquid transfer channel N, and the liquid movement is controlled by a pump hoist. A washing machine equipped with a pump is shown in which the moving water channel is opened by an electromagnetic type connecting valve when the washing machine is executed. Because of the loud noise, a soundproof structure was required. Therefore, the applicant has already proposed in Japanese Patent Application No. 59-52707 a washing machine with a pump that does not use a solenoid valve by simultaneously operating the pump and the connecting valve using an electric motor with a rotor that can move freely in the thrust direction. ing.

(c) Problems to be Solved by the Invention The present invention further improves the above-mentioned proposal, and in particular, smoothly interlocks the electric motor whose rotating shaft is movable in the thrust direction, its cooling fan, and the pump impeller. Even if water were to leak from the pump impeller bearing, it would not be applied to the electric motor, increasing reliability.

(d) Means for Solving Problems The present invention provides a washing machine with a pump that moves liquid in a washing tub, including an electric motor whose rotating shaft is movable in the thrust direction, and a motor that is coaxial with the upper end of the rotating shaft. It has a cooling fan that is fixed in a shape, and an impeller that is coaxially arranged above the fan, and the fan and the drive shaft of the impeller are slidable in the thrust direction and transmit only rotational force. The fan is connected through a rotation transmission means, and the fan is provided with a rotary plate for splashing water leakage.

(e) Effect Therefore, when the electric motor is energized or de-energized, the movement of the rotating shaft in the thrust direction causes the cooling fan to simultaneously move up and down in the thrust direction, and the movement of the cooling fan in the thrust direction is controlled through the rotation transmission means. It smoothly transmits only the rotation of the electric motor to the impeller without transmitting it to the impeller of the pump.Furthermore, in the unlikely event that water leaks from the bearing of the impeller, the rotary plate installed in this cooling fan will splash it to the surrounding area. Never get the motor wet.

(F) Embodiment 1 is a washing machine with a pump, which consists of a main body 2 and a water tank 3. An outer tub 4 is suspended in the main body 2 in a vibration-proof manner, and a washing tub 6 with a dehydration hole 5 that also serves as a dehydration tank is provided in the outer tub 4, and a rotary blade 7 is provided at the bottom of the washing tub 6. It is arranged. The back surface of the outer tub 4 is equipped with a rotary blade 7 and a washing machine electric motor 8 for rotating the washing tub 6, and a drain port 9 for the washing tub 6 is provided, and this drain port 9 is driven by a drain solenoid 10. It is connected to a drain hose 12 via a drain valve 11. The bottom of the water tank 3 and the drain port 9 are connected by a connecting waterway 13, and the connecting waterway 13 has a pump mechanism 16 consisting of a connecting valve 14 and a reversible pump 15 for opening and closing the waterway 13. The connecting waterway 13 is also communicated with the drain hose 12 via the drain valve 11.

The reversible pump 15 has an impeller 1 housed in a pump chamber 17 provided at the bottom of the water tank 3.
8, the impeller 18 is attached to the upper end, and the lower end is connected to the pump chamber 1 in a watertight manner via a water-sealing bearing 19.
A drive shaft 22 that protrudes below the bottom cover 20 of No. 7 and has its lower end serrated to form a male rotation transmission portion 21.
Consisting of

The connecting valve 14 is connected to the bottom cover 20 of the pump chamber 17.
A bellows-shaped valve body 24 is disposed in the valve chamber 23 integrally molded downward from the top, and a biasing spring 26 that urges the valve body 24 upward to always close the valve port 25 with the valve body 24. This valve body 24 is connected to the spring 26
The valve rod 27 is pulled downward against the urging force of It is configured to communicate with the connecting port 28.

29 is a pump electric motor that drives the pump mechanism 16, and this pump electric motor 29 is connected to the stator 3.
The rotor 31 is configured to be movable in the thrust direction with respect to
3 is suspended and fixed to a hanging member 34 extending downward from the bottom cover 20 of the pump chamber 17. As a result, when power is cut off, the rotor 31
The rotor 31 falls under its own weight and is held in a state where it has moved 15 mm downward with respect to the stator 30. On the other hand, when electricity is applied, the rotor 31 is pulled up by electromagnetic force and is driven to rotate while being approximately parallel to the stator 30. It is something to do. 35 and 36 are upper and lower bearings, and 37 is a stopper for regulating the lower limit position of the rotor 31 formed at the upper end of the oil cap of the lower bearing 36.

Reference numeral 38 denotes a cooling fan which is fitted into the lower recess 39a of the central shaft 39 into the upper end of the rotary shaft 32 and fixed coaxially with a pin 40. The inner circumferential wall of the upper recess of the central shaft 39 is a female rotation transmitting part 41 which is serrated. By inserting the male rotation transmitting portion 21 so as to be freely removable and removable, the rotational driving force of the rotor 31 is transmitted to the impeller 18, but the vertical movement of the rotating shaft 32 is not transmitted to the impeller 18.

Reference numeral 42 denotes a bearing bearing fixed to the upper protruding portion of the motor case 33 of the rotating shaft 32 by fitting an inner race 42a below the cooling fan 38, and 43 a bearing holder into which the outer race 42b of the bearing bearing 42 is fitted. A pair of protruding collars 4 are provided around this bearing holder 43.
4 and 44 are provided axially symmetrically. 45 is a hanging piece attached to the bottom cover 20 of the pump chamber 17;
Reference numeral 6 designates a transmission arm having a central shaft portion 46a rotatably supported at the lower end of this hanging piece 45;
The forked base ends 46b, 46b are hooked onto the protruding flanges 44, 44 of the bearing holder 43 from above, and the tension protection spring 47 of the valve rod 27 is attached to the working end 46c.

Therefore, when the pump electric motor 29 is energized, the rotor 31 is pulled up and rotated by electromagnetic force until it is substantially juxtaposed with the stator 30, and the cooling fan 38 and impeller 18 rotate, and the base end 46b of the transmission arm 46 rises. The end 46c is lowered to pull the valve rod 27 downward, so that the valve body 24 separates from the valve port 25 and opens the connecting valve 14. At this time, the transmission arm 46 has a rotating shaft 32 for the bearing 42. The rotational force of the rotating shaft 32 is not transmitted at all.
Only movement in the thrust direction is transmitted. Moreover, only the rotational force of the rotating shaft 32 is applied to the central shaft 3 of the cooling fan 38, which is fixedly arranged coaxially with the rotating shaft 32.
9, the rotation is smoothly transmitted to the impeller 18 of the reversible pump 15 via the rotation transmission means, that is, the serrated female rotation transmission part 41 and the male rotation transmission part 21, so that the impeller 18 can also rotate with some wobbling. There is no abnormal noise associated with it. Furthermore, even if water leaks from the water-sealing bearing 19, the water will hit the upper surface of the rotating plate 38a of the cooling fan 38, and since the rotating plate 38a is rotating at high speed, the leaking water will scatter in the circumferential direction. Since the fan electric motor 29 does not get wet, the fan electric motor 2
No deterioration of the insulation performance of 9. Further, since the cooling fan 38 moves up and down as the rotation shaft 32 moves up and down, the fan 38 and the transmission arm 46 will not collide, and there is no risk of damaging the fan 38.

Then, by operating the operation switches 48 and 49, the washing machine electric motor 8, drain solenoid 10, clutch mechanism (not shown), and water supply valve (not shown) are combined and driven to perform washing and dewatering operations. Only during the period when the reversible pump 15 is driven by driving the pump electric motor 29, the connecting waterway 1
3 is opened, and washing water or rinsing water is moved from the outer tank 4 to the water tank 3 or from the water tank 3 to the outer tank 4.

(G) Effects of the Invention According to the present invention, as the rotating shaft of the electric motor moves in the thrust direction, the cooling fan also moves up and down in the thrust direction. By using a rotation transmission means that is slidable in the thrust direction, the vertical movement of the cooling fan is not transmitted to the impeller, and only the rotational force of the electric motor is smoothly transmitted to the impeller, so the impeller does not wobble vertically. rotate,
No uneven wear or abnormal noise of used parts. Furthermore, even if water should leak from the bearing of the impeller drive shaft, the leakage will be splashed off by the high-speed rotating sprinkling plate and will not wet the electric motor, making it possible to obtain a durable washing machine with a pump.

[Brief explanation of the drawing]

1 to 3 relate to an embodiment of a washing machine with a pump according to the present invention, and FIG. 1 is a sectional view of the main part, and the chain double-dashed line indicates the energized state. FIG. 2 is an overall cross-sectional side view, and FIG. 3 is a bottom view of the main parts seen from the top of the motor to the bottom of the water tank. Moreover, FIG. 4 is an explanatory diagram of a mechanism of a conventional example. 6... Washing tub, 15... Reversible pump, 32... Rotating shaft, 38... Cooling fan, 21... Male rotation transmission part, 4
1...Female rotation transmission part, 38a...Rotary plate for water leakage and scattering.

Claims (1)

[Claims] 1. A washing machine with a pump that moves liquid in a washing tub, which includes an electric motor whose rotating shaft is movable in the thrust direction, a cooling fan coaxially fixed to the upper end of the rotating shaft, and an upper part of the fan. the fan and the drive shaft of the impeller are connected via a rotation transmission means that is slidable in the thrust direction and transmits only rotational force; A washing machine with a pump characterized by forming a rotating plate for splashing water leakage.