JPS58159798A - Centrifugal dehydr - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a centrifugal dewatering machine, and the drive unit that provides dewatering rotation to the dewatering basket is composed of an axial gap induction motor, and when this type of motor is energized, the suction between the stator and rotor is reduced. Considering the fact that the force is strong, by providing a braking function when the power is not energized, the braking mechanism of the centrifugal dehydrator can be greatly simplified compared to the conventional one, and the reliability of its operation can be increased. purpose.

Conventionally, the braking mechanism in a general centrifugal dehydrator is to operate an electromagnetic magnet electrically by opening and closing the dehydrating lid to actuate the braking means, or to apply the opening/closing force of the dehydrating lid to the braking means using a flexible wire or a link mechanism. There was a method of communicating and making it work. The former is generally used in fully automatic washing machines, and the latter as a dewatering mechanism in dual-tub washing machines, but both require components such as electromagnetic magnets and flexible wires, are structurally complex, and are costly. It was also high.

The present invention provides a dehydrator structure having a braking mechanism whose structure is extremely simplified compared to the conventional one by configuring the drive part with an axial gap induction motor. This will be done together with the explanation of the conventional general structure. Figures 1 to 3 show this embodiment, where 1 is a housing that also serves as a dehydration tank of a centrifugal dehydrator, 2 is a dehydrating liquid, and the surrounding wall has many holes 2a for dehydration. It is arranged so that it can be rotated for dehydration. Reference numeral 3 denotes an underframe, which constitutes the bottom of the housing 1, and has a substantially annular concave groove portion 3a on the upper surface side of the outer periphery to receive the dehydration liquid. Reference numeral 4 denotes a drainage hole provided in communication with the inner bottom of the groove 3a, which communicates with the outside of the machine. 5 is a cover for the dehydration tray, and 6 is a dehydration lid.

Here, the dehydrating liquid 2 is made of metal or synthetic resin, and a cylindrical wall 2 is provided integrally extending downward at the lower part of the peripheral wall thereof.
b, and this cylindrical wall 2b covers the motor, which is a drive section to be described later, from the circumferential direction, and its lower end is connected to a groove section 3a.
close to the open end of the Reference numeral 3b denotes a through hole formed in the center portion of the underframe 3, through which the lead wire 7 for energizing the motor passes through.

M is an axial air gap induction motor with a stator 8 and an iron core 8 at the mouth.
a, the coil 8b, etc. are integrally molded using a resin material such as nonflammable thermosetting polyester.

The rotor 9 is formed by die-casting a rotor core 9a of aluminum and forming it into a disk shape.
The boss portion, which is the center of rotation, has a key groove 9b, for example.
It is constructed so that it can slide freely in the axial direction by engaging with a key 10a provided at 1° of the motor shaft, and is connected in a constant state of engagement in the rotational direction.

11 and 12 are motor bearings provided on the stator 8, which rotatably support the motor shaft 1o. Reference numeral 13 designates a coupling for connecting the upper end of the motor shaft 10 and the bottom of the dehydrating liquid 2, and reference numeral 14 designates a plurality of suspensions that elastically support the drive unit.

15 is a brake lining whose sliding surface is the lower surface of the fixed plate 16 attached to the stator 8.

They are fixed to the upper surface of the rotor 9 with screws 9d so as to face each other. Note that the brake lining 16 is attached to the fixing plate 16.
The rotor 9 may be fixed to the upper surface of the rotor 9 with its sliding surface facing the upper surface of the rotor 9.

Reference numeral 16a designates a plurality of air holes formed on the peripheral edge of the fixed plate 16. When the rotor 9 rotates, air generated by the fins 9C integrally formed on the outer periphery of the rotor 9 is forced through the air holes 16a. The stator 8 and rotor 9 are cooled by the flow of air at this time.

1 is a spring, which is interposed between the stator 8 and the rotor 9 via the motor bearing 11 and the spacer 18 in contact with the motor bearing 11, and constantly presses and biases the rotor 9 in the direction of separating it from the stator 8. Due to this biasing force, the above-mentioned fixing plate 16
The lower surface of the brake lining 16 is brought into contact with the brake lining 16.

This state is as shown in FIG. When the stator 8 side is energized, the rotor 9 is attracted to the stator 8 side in the axial direction by the field force and rotates. That is, a gap is created between the lower surface of the fixed plate 16 and the brake lining 16.

Reference numeral 19 indicates a suspension mounting screw to connect the fixing plate 16, stator 8 and suspension 14 to a support 20 for supporting the suspension 14 [on the other hand, the lower surface of the fixing plate 16 and
Spring washer 21 for adjusting the gap with Tsuki lining 16
It is fixed by screwing through.

The dehydration lid 6 can open and close the upper opening of the dehydration liquid 3. When the dehydration lid 6 is opened while the drive unit is energized, a lid switch (not shown) is opened and the axial gap induction motor is activated. Power to M is turned off. At this time, the rotor 9 moves away from the stator 8 in the length direction of the motor shaft 1o due to the force of the spring 17, and the rotor 9 VC,
The upper surface of the attached brake lining 16 is the fixed plate 1
6, the rotating dehydrating liquid 3 is braked and its rotation is stopped. Conversely, when the axial gap induction motor M is energized, the rotor 9
, the rotor core 9a is attracted by the field force set by the coil ab$ (7), and at the same time, the brake lining 15 attached to the rotor 9 separates from the fixed plate 1p and is released from braking, starting the dehydration operation. will be started.

FIG. 4 shows an example of the configuration of a centrifugal dehydrator in a conventional general two-tub type washing machine, and 25 indicates an induction motor having a gap in the radial direction constituting a drive unit, a rotor 26a, a rotor shaft 2
It includes a 5b1 stator core 25c and a coil 2sd. 26 is a coupling that connects the dewatering shaft 27 and the rotor shaft 25b, and a braking wheel portion 26a is formed in a part of the coupling.

28 is an insulating bushing provided to prevent electrical leakage between the dehydration shaft 27 and the rotor shaft 25b; 29 is a motor cover provided to prevent water, dust, etc. from entering the induction motor 25;
o is the suspension, 31u is a brake shoe disposed so as to come into contact with the brake wheel portion 26a, and 32 is a brake lever that holds the brake shoe 31. 33 is a dehydration receiver, 34 is a seal portion of the dehydration receiver 33, and 36 is a dehydration lid.

In the conventional centrifugal dehydrator described above, in order to transmit the opening/closing operation of the dehydrating lid 36 to the brake lever 32 of the braking mechanism, in a fully automatic washing machine, an electromagnetic magnet is used, or in a centrifugal dehydrator of a two-tub washing machine, , flexible wires and various other components are required.

However, as is clear from the above embodiments, according to the centrifugal dehydrator of the present invention, the dehydrating rotation system can be simplified without any need for the conventional mechanism for transmitting the lid opening/closing operation to the braking mechanism, and the dehydrating system can be simplified. The drive unit is built into a round cylindrical wall that is integrated with the cage, eliminating the need for a dewatering receiver and a seal that were conventionally required. Therefore, it is possible to save and effectively utilize the space in terms of structure, and in manufacturing VCs, it is possible to reduce the material cost of parts that can be omitted, the manufacturing and assembly processing cost, etc. The industrial value is extremely large.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal sectional view of a centrifugal dehydrator according to an embodiment of the present invention, Fig. 2 is a top view of its drive section, Fig. 3 is a side view of the same half-section, and Fig. 4 is a conventional centrifugal dehydrator. FIG. 1... Housing, 2... Dehydration basket, 2b...
...Cylindrical wall, 4, Drain hole, M,...
, , Axial gap induction motor 8 , Stator 9 , Rotor 169 .・・・Brake lining. Name of agent: Patent attorney Toshio Nakao and 1 other person
lI! l Fig. 2 Fig. 311I No. 45g 6 ◇ Heart δl -582-

Claims (1)

[Claims] It includes a housing that also serves as a dehydration tank, and a dehydration cage arranged in the housing so as to be rotatable for dehydration, and a driving section for rotating the dehydration basket for dehydration is constituted by an axial gap induction motor, and the induction motor is connected to a stator. a motor shaft rotatably supported by a bearing provided on the stator; a rotor that is slidable in the axial direction and connected in the rotational direction with respect to the motor shaft; A brake lining is provided with a moving surface facing the upper part of the rotor, and a spring is disposed between the stator and the rotor, and when the induction motor is not energized, the rotor is axially moved by the biasing force of the spring. - a cylindrical wall extending downwardly from the circumferential wall of the dewatering basket to cover the induction motor from the circumferential direction; A centrifugal dehydrator with a drainage hole on the bottom side of the body.