JPH0241995B2 - - 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. 18655/1983.
On the other hand, Japanese Utility Model Publication No. 57-169284 (see Figure 4) discloses that the outer tank B and water 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 proposal, and by rationally arranging the pump, the connecting valve, and the electric motor, these pumps, the connecting valve, and the electric motor can be operated by one electric motor. It is designed to drive smoothly.

(d) Means for Solving the Problems The present invention provides a washing machine with a pump in which a connecting valve is opened and closed in conjunction with the operation of a pump that moves liquid in a washing tub, in which the rotating shaft is movable in the thrust direction. The impeller of the pump is provided with an electric motor, and the impeller of the pump is rotationally driven via a rotation transmission shaft disposed coaxially with the rotation shaft, and the connecting valve is driven by a bearing attached to the rotation shaft that does not transmit rotational force. It is characterized in that it is opened and closed via a transmission rod that is rotated in the thrust direction.

(e) Effect Therefore, when the electric motor is energized, the movement of the rotor in the thrust direction is smoothly transmitted to the transmission rod as rotation only in the thrust direction by the bearing that does not transmit rotational force, and the connecting valve is opened smoothly. This prevents the transmission rod from rotating with rattling as the rotor rotates.

(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 within the integrally molded valve chamber 23 in the direction from the top, a biasing spring 26 that biases the valve body 24 upward and always closes the valve port 25 with the valve body 24, and this valve body 24. It houses a valve rod 27 that pulls the valve body 24 downward against the biasing force of the spring 26. By pulling the valve rod 27 downward, the valve port 25 and the It is configured to communicate with a connection port 28 connected to the connection waterway 13.

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 moved by 15 mm downward relative to the stator 30. On the other hand, when energized, 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.

38 is a cooling fan in which the lower recess 39a of the central shaft 39, which is a rotation transmission shaft, is fitted into the upper end of the rotating shaft 32 and fixed with a pin 40, and the inner circumferential wall of the upper recess of the central shaft 39 is serrated. The male rotation transmission section 21 is inserted into the female rotation transmission section 41 to transmit the rotational driving force of the rotor 31 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, into which the inner race 42a located below the cooling fan 38 is fitted, and 43 is a bearing holder into which the outer race 42b of this 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 bearing 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 active 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.
The transmission arm 46 rotates in the thrust direction by being transmitted with only the movement in the thrust direction, and therefore the transmission arm 46 does not rotate in the thrust direction while wobbling as the rotor 31 rotates. There is no abnormal noise. However, the rotational force of the rotating shaft 32 is transmitted from the central shaft 39 of the cooling fan 38 fixedly arranged coaxially with the rotating shaft 32 to the reversible pump via the serrated female rotation transmitting section 41 and the male rotation transmitting section 21. The power is transmitted smoothly to the 15 impellers 18, so that the impellers 18 do not rotate with any wobbling, and no abnormal noise is generated as a result.

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, only the movement of the rotating shaft of the electric motor in the thrust direction is reliably converted into the rotational movement of the transmission rod in the vertical direction by the bearing that does not transmit rotational force, and the transmission rod is connected. The connecting valve is opened and closed by driving the valve rod of the valve up and down, and there is no play in the vertical movement of the transmission rod due to this conversion and rotation of the rotating shaft, and there is no problem due to this. There is no noise generation, and since the electric motor is coaxially disposed right below the impeller of the pump, the impeller can be rotated smoothly and the generation of abnormal noise can be prevented. In addition, since there is no need to use an expensive solenoid valve to drive the connecting valve as in the past, there is no operating noise from this solenoid valve, which eliminates the generation of abnormal noise as in the former case, and reduces noise during operation. In addition, since the cost of parts used is low, it is possible to obtain a washing machine with a pump with reduced manufacturing costs.

[Brief explanation of drawings]

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, 14... Connection valve, 15... Reversible pump, 32... Rotating shaft, 42... Bearing bearing, 46
...transmission arm.

Claims (1)

[Claims] 1. A washing machine with a pump in which a connecting valve is opened and closed in conjunction with the operation of a pump that moves liquid in a washing tub, comprising an electric motor whose rotating shaft is movable in a thrust direction, and an impeller of the pump is connected to the rotating shaft. The connecting valve is rotationally driven via a rotation transmission shaft disposed coaxially with the rotation shaft, and the connecting valve is opened and closed via a transmission rod rotated in the thrust direction by a bearing attached to the rotation shaft that does not transmit rotational force. A washing machine with a pump characterized by: