JPH0663286A - Brake device for one vessel type spin-drying/ washing machine - Google Patents

Abstract

(57) [Abstract] [Purpose] An object of the present invention is to obtain a brake device for a single-tub washing machine in which a washing / dehydrating tub can be securely fixed and rotated and braked. [Structure] A brake disc 4 is provided in an opening of a washing / dehydrating tub 33, and a receiving cover A2 and a receiving cover B3 facing the upper and lower surfaces of the brake disc 4 are arranged in an inner tub 32, and a receiving cover B is provided.
3 is provided with an electromagnet 5, and the receiving cover A2 is provided with a brake shoe 6 formed of an armature. When washing and rinsing, the electromagnet 5 is excited to press the brake shoe 6 against the brake disc 4. 33 is braked at a large diameter portion so that the braking torque becomes large and stable, and it can be securely fixed and braking the rotation.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a brake device for fixing a washing / dehydrating tub during washing and rinsing in a one-tank type dewatering washing machine.

[0002]

2. Description of the Related Art In a one-tank type dewatering washing machine, the washing / dehydrating tub is fixed and the pulsator is rotated during washing and rinsing, the washing / dehydrating tub is rotated at high speed during dewatering, and the rotation is braked at the end of dewatering. Then wash, rinse,
I try to dehydrate. And the brake device for that is equipped.

This brake device is disclosed in Japanese Patent Laid-Open No. 55-166.
As shown in Japanese Laid-Open Patent Publication No. 189, a structure in which a drive mechanism section is incorporated is generally known.

The structure will be described below with reference to FIGS. 3 and 4. In FIG. 3, 31 is an exterior body,
Reference numeral 32 denotes an inner tank in which a washing / dehydrating tank 33 is internally provided. The water tank 32 is supported by a support plate 34, and the support plate 34 is supported by a suspension 35. Reference numeral 36 denotes a drive mechanism portion mounted on the outer bottom surface of the support plate 34. This drive mechanism section 3
Reference numeral 6 denotes a concentric double shaft, which supports a rotary shaft 37 of a washing / dehydrating tub 33 and a rotary shaft of a pulsator 38, and rotates the rotation of a motor 40 transmitted by a V-belt 39. (Refer to FIG. 4), and a brake device for fixing the washing / dehydrating tub 33 at the time of washing and rinsing.

This brake device is constructed as shown in FIG. 4, and when the solenoid valve 43 is not energized, the coil shoe 44 presses the brake shoe 46 of the brake band 45 against the brake wheel 47 to wash and release the brake. Aquarium 3
The rotating shaft 41 of 3 is braked. When the dehydration operation is started, the solenoid valve 43 is energized, the operating rod 48 is attracted in the direction of arrow a, and the second lever 49 rotates about the shaft 50 in the direction of arrow b. As a result, the first lever 51 rotates around the shaft 52 in the direction of arrow c against the coil spring 44, so that the movable shaft 53 moves in the direction of arrow d and loosens the brake band 45. When the excitation of the solenoid valve 43 is released, the brake band 45 tightens the brake wheel 47 by the coil spring 44. The electromagnetic valve 43 opens and closes the electromagnetic drain cock 43a as shown in FIG.
The electromagnetic drain cock 43a is closed by excitation so that washing or rinsing can be performed.

[0006]

In the brake device for the one-tub type washing machine having such a conventional structure, the washing / dehydrating tub 33 is used.
The torque for fixing or braking (hereinafter referred to as braking torque) is adjusted by the braking torque adjusting screw 54 at the time of assembly. However, the adjustment amount of the contact point between the operating rod 48 and the second lever 49 is taken into consideration. Since a gap L is expected between them, large and small variations occur in the gap L after adjustment.

On the other hand, when the washing machine is used for a long time and the operation of the brake device is repeated, the brake band 45
The second lever 49 is displaced in the direction opposite to the arrow a due to the extension of the brake shoe 46 or wear of the brake shoe 46, and finally the gap L between the second lever 49 and the operating rod 48 becomes 0, and the second lever 49 comes into contact with the second lever 49. The braking torque of the coil spring 44 is reduced, and the brake band 45 is changed to the brake wheel 47.
Has a problem that it is not tightened with the required braking torque,
As a result, the washing / dehydrating tub 33 is insufficiently fixed, and the washing / dehydrating tub 33 rotates together with the laundry during the washing, resulting in a significant decrease in the washing effect.

Further, since the braking device is provided in the drive mechanism portion 36, the diameter of the brake wheel 47 is inevitably small, and the coil spring 44 is required to have a large output in order to obtain a necessary braking torque. I had to do it. As a result, the solenoid valve 43 also needs a strong one, and there is a problem in that it becomes large.

Further, although not shown, the second lever 4
The clutch device for switching the rotational operation of the rotary shaft 41 of the washing / dehydrating tub 33 and the rotary shaft 42 of the pulsator 38 in conjunction with 9 may not operate due to the above-mentioned displacement of the second lever 49. Since the rotating shaft 41 and the rotating shaft 42 cannot be rotated integrally, the pulsator 3
There is a problem that the rotating shaft 42 of No. 8 is rotated by a rotating operation during washing, and as a result, the laundry is rubbed against the pulsator 38 during dehydration.

The present invention solves the above problems, and an object of the present invention is to provide a brake device for a one-tank type dehydration washing machine in which the washing / dehydrating tub can be securely fixed and its rotation can be braked.

[0011]

In order to achieve the above object, the present invention provides a braking means for braking the rotation of the washing / dehydrating tub of a one-tank type dewatering washing machine at the opening of the washing / dehydrating tub. And a brake shoe pressed against the brake disk by a pressing force.

[0012]

In the above construction, the brake means is braked at the maximum diameter portion of the washing / dehydrating tub by pressing the brake shoe against the annular brake disk arranged at the opening of the washing / dehydrating tub to brake. Therefore, the braking torque becomes large and stable.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS.

The same parts as those shown in the conventional example are designated by the same reference numerals, and the description thereof will be omitted. In the figure, reference numeral 1 is a balancer ring, which is mounted on the upper portion of the washing / dehydrating tub 33. Reference numeral 2 denotes a receiving cover A, which is provided in an opening portion of the inner tank 32 so as to project inwardly in a ring shape and faces above the balancer ring 1. Reference numeral 3 denotes a receiving cover B, which is annularly provided above the receiving cover A2 with a gap therebetween substantially in parallel. Reference numeral 4 denotes a brake disc formed of an abrasion resistant abrasion member, which is annularly provided at the opening of the washing / dehydrating tank 33 and has small gaps Y and Z between the receiving cover A2 and the receiving cover B3. Then, it rotates together with the washing / dehydrating tub 33.
In this embodiment, the brake disc 4 is continuously provided above the balance ring 1, but the brake disc 4 may be continuously provided in the washing / dehydrating tank 33. In that case, the receiving cover A2 and the receiving cover B3 are provided. Is also arranged corresponding to the position of the brake disc 4.

Numeral 5 is an electromagnet wound around the iron core 5a, and an appropriate number of electromagnets are arranged on the receiving cover B3, and are excited by a control means (not shown) at the time of washing, rinsing and dehydration. Reference numeral 6 denotes a brake shoe formed of an armature, which is arranged to be movable up and down on the receiving cover A2 in correspondence with the electromagnet 5, and is attracted by the magnetic force m generated from the excited electromagnet 5 and pressed against the brake disc 4. It has become. Reference numeral 7 denotes a drive mechanism portion, which has a mechanism for switching and transmitting the rotation of the motor 40 to the rotation shaft 8 of the pulsator 38 at the time of washing and rinsing and to the rotation shaft 9 of the washing / dehydrating tub 33 at the time of dehydration.

In the above structure, when washing is started automatically, the control means excites the electromagnet 5 to attract the brake shoe 6. The sucked brake shoe 6 ascends in the receiving cover A2 and is pressed against the brake disc 4 by a suction force, and the pressure contact force brakes and fixes the washing / dehydrating tub 33 so as not to rotate. Then, water is supplied, and the pulsator 38 is rotated by the switching of the drive mechanism unit 7 to wash. At this time, since the washing / dehydrating tub 33 is fixed as described above, it does not rotate together with the laundry.

When washing is completed, water is drained and water is supplied for rinsing. At this time as well, the electromagnet 5 is excited as in the case of washing, so that the washing / dehydrating tub 33 does not rotate together with the laundry.

When the rinsing is completed, the water is drained and dehydrated. Since the electromagnet 5 is not excited during this dehydration, the brake shoe 6 is lowered by its own weight into the receiving cover B2.
The brake disc 4 is in a rotatable state. In this state, by switching the drive mechanism section 7, the washing / dehydrating tub 3
3 rotates to perform dehydration. Then, at the end of the dehydration, the control means excites the electromagnet 5 to attract the brake shoe 6. The sucked brake shoe 6 rises in the receiving cover A2 and is pressed against the brake disk 4 by the suction force, and the pressing force brakes and stops the rotation of the washing / dehydrating tub 33.

As described above, according to the one-tank type dewatering washing machine of the embodiment of the present invention, the washing and dewatering tank 3 is used at the time of washing and rinsing.
A brake device for fixing 3 and braking the rotation of the washing / dehydrating tub 33 at the end of the dehydration is pressed against the annular brake disc 4 and the brake disc 4 provided at the opening of the washing / dehydrating tub 33 by a pressure contact force. Since it is formed with the brake shoe 6, it is braked at the maximum diameter portion of the washing / dehydrating tub 33, so that the braking torque becomes large and stable, and the washing / dehydrating tub 33 can be securely fixed and braked. effective.

Further, since the braking means is arranged at the opening of the washing / dehydrating tub 33, the driving mechanism 7 does not need a braking device, and the braking means is operated by a signal from the control section. The switching operation between the rotary shaft 8 of the pulsator 38 of the drive mechanism section 7 and the rotary shaft 9 of the washing / dehydrating tub 33 is mechanically irrelevant and is caused by the elongation of the brake band and the wear of the brake shoes shown in the conventional example. There is an effect that it is possible to eliminate a coupling error between the rotary shaft of the pulsator and the rotary shaft of the washing / dehydrating tub during dehydration.

In this embodiment, the pressure contact of the brake shoe 6 with the brake disc 4 is formed by the electromagnet 5 and the armature. However, the invention is not limited to this, and the brake disc 6 is clamped by the brake shoe 6. , Those that are braked by frictional force by pressing, etc. are included.

[0022]

As is apparent from the above description of the embodiments, according to the present invention, the brake means for braking the rotation of the washing / dehydrating tub is provided in the opening of the washing / dehydrating tub as an annular brake. By forming the disc and the brake shoe that is pressed against the brake disc by the pressure contact force, the washing and dewatering tub is braked at its maximum diameter part, so the braking torque becomes large and stable, and the washing and dewatering tub is secured. Can be fixed and brake the rotation.

Further, since the braking means is provided in the opening of the washing / dehydrating tub separately from the drive mechanism, the switching operation between the rotating shaft of the pulsator and the rotating shaft of the washing / dehydrating tub of the driving mechanism is performed. Since it is mechanically irrelevant, it is possible to eliminate a coupling error between the rotary shaft of the pulsator and the rotary shaft of the washing / dehydrating tub during dehydration.

As described above, according to the present invention, it is possible to provide a one-tank type dewatering washing machine in which the washing / dehydrating tub can be securely fixed and the rotation thereof can be braked.

[Brief description of drawings]

FIG. 1 is a partially cutaway side view of a one-tub dewatering washing machine according to an embodiment of the present invention.

FIG. 2 is a side sectional view of the same main part.

FIG. 3 is a partially cutaway side view of a conventional one-tank dewatering washing machine.

FIG. 4 is a plan view of the main part.

[Explanation of symbols]

 4 Brake Disc 6 Brake Shoe 7 Drive Mechanism Section 32 Inner Tank 33 Washing and Dehydrating Tank

Claims (2)

[Claims] 1. A washing / dehydrating tub in which a pulsator is rotatably disposed at an inner bottom portion, an inner tub in which the washing / dehydrating tub is installed, and the pulsator or the washing / dehydrating tub is selectively driven to rotate. A drive mechanism section for controlling the rotation of the washing and dehydrating tub, and the braking means,
A brake device for a one-tank type dehydration washing machine, comprising an annular brake disc provided at an opening of the washing / dehydrating tub and a brake shoe pressed against the brake disc by a pressure contact force. 2. The brake means according to claim 1, wherein a brake disc provided on an upper part of the washing / dehydrating tub and an upper part of an inner tub containing the washing / dehydrating tub are opposed to each other with the brake disc interposed therebetween. A brake device for a one-tank type dehydration washing machine, comprising: an electromagnet and a brake shoe, which are arranged so as to come into contact with and separate from a brake disc at an installation position above an inner tub.