JP2014207932A - Twin tub washing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a twin tub washing machine in which deterioration in braking force can be suppressed by stably bringing a brake shoe into press-contact with a brake drum.SOLUTION: The twin tub washing machine includes braking means for braking the rotation of a dewatering basket. The braking means includes: a brake support plate provided at a dewatering motor so as to allow a rotary shaft of the dewatering motor to penetrate; a swing arm provided at the brake support plate so as to swing between a brake position for bringing a brake shoe into press-contact with a brake drum and an open position for separating the brake shoe from the brake drum; and a cleaner part for removing dirt on the brake drum surface by being in contact with the brake drum. The cleaner part is configured in such a manner that it is separated from the brake drum according to the swing of the swing arm to the open position.

Description

  The present embodiment relates to a two-tub washing machine.

  2. Description of the Related Art Conventionally, a two-tub washing machine has a configuration in which a washing tub for performing washing and a dehydrating tub for performing dehydration are arranged side by side, and the laundry is stored and dehydrated in the dehydration tub. A dewatering basket for the purpose is rotatably arranged. Further, the two-tub washing machine is provided with a braking device having a brake drum and a brake shoe for braking against the rotation of the dewatering basket.

JP 2004-249125 A

By the way, in the above-described two-tank washing machine, if the surface of the brake drum is contaminated with abrasion powder or the like of the brake shoe, the braking force of the braking device is reduced or a so-called brake noise is generated.
Thus, a two-tank washing machine is provided that can stably press the brake shoe against the brake drum and suppress a reduction in braking force.

  The two-tank washing machine according to the present embodiment includes a dewatering basket that accommodates an object to be dehydrated, a dehydration motor that rotates the dewatering basket, and a braking unit that brakes the rotation of the dewatering basket. . The braking means includes a rotating shaft of the dehydrating motor or a brake drum provided between the rotating shaft and the dewatering rod, and a brake provided on the dehydrating motor so as to pass through the rotating shaft of the dewatering motor. A support plate and a brake shoe facing the brake drum, and swinging between a brake position where the brake shoe is pressed against the brake drum and an open position where the brake shoe is separated from the brake drum A swing arm provided on the brake support plate, and a cleaner portion that removes dirt on the surface of the brake drum by contacting the brake drum, and the cleaner portion is integrated with the swing arm. Provided, and is configured such that the cleaner portion is separated from the brake drum as the swinging arm swings to the open position. There.

It is a top view of a dehydrating motor and a braking means, Comprising: The figure showing the open position of a swing arm about a braking means Broken back view showing the entire configuration of the two-tub washing machine with the back cover removed Perspective view from the back side of the vicinity of the braking means FIG. 1 equivalent view showing a state in which the brake drum and the swing arm of the braking means are removed. FIG. 1 equivalent view showing the braking position of the swing arm for the braking means Schematic diagram for explaining the width of each of the cleaner and brake shoe

Hereinafter, the present embodiment will be described with reference to FIGS.
As shown in FIG. 2, the two-tub washing machine has a configuration in which a washing tub 2 and a dewatering tub 3 are arranged side by side in an outer box 1 and the outer box 1 is coupled on a base plate 4. A stirring body (not shown) that generates a water flow by stirring the water stored in the washing tub 2 is disposed at the inner bottom of the washing tub 2. Inside the dewatering tub 3, a dewatering basket 5 for storing and dewatering laundry (not shown) as a material to be dewatered is rotatably disposed. A large number of dewatering holes (not shown) are provided in the peripheral side portion of the dewatering basket 5 to shake off moisture contained in the laundry by centrifugal force. Further, a shaft 5 a extending downward is provided at the center of the outer bottom side of the dewatering basket 5 so as to penetrate the inner bottom of the dewatering tank 3.

  Although not shown, a washing lid for opening and closing the upper surface opening of the washing tub 2 is detachably provided on the upper portion of the outer box 1, and a dehydration lid for opening and closing the upper surface opening of the dehydration tub 3 is provided at the rear portion thereof. Is provided so as to be able to turn in the vertical direction.

  The washing motor 6 and the dehydrating motor 7 arranged on the inner bottom of the outer box 1 are attached and fixed in a juxtaposed state with respect to the base plate 4. The washing motor 6 is composed of, for example, a condenser motor (induction motor), and the rotation shaft of the washing motor 6 is coupled to the drive shaft of the agitator through a power transmission mechanism 8. The power transmission mechanism 8 includes a drive pulley 9a attached to the rotating shaft of the washing motor 6, a driven pulley 9b attached to the drive shaft, and a belt 10 spanned between the pulleys 9a and 9b. It is. Thus, the washing motor 6 rotates the stirring body through the power transmission mechanism 8 at a low speed, thereby generating a water flow for stirring the laundry (not shown) accommodated in the washing tub 2 together with the washing water.

  The dehydrating motor 7 is composed of, for example, an induction motor, and the rotating shaft 11 of the motor 7 is connected to the shaft 5 a of the dewatering basket 5. As a result, the dehydration motor 7 directly rotates the dewatering basket 5 at a high speed, thereby centrifugally dehydrating the laundry stored in the dewatering basket 5. The structure of the connecting portion between the dehydrating motor 7 and the dewatering basket 5 and the structure of the braking means 15 for braking the rotation of the both 5 and 7 will be described with reference to FIGS.

  As shown in FIG. 3, the braking means 15 includes a brake support plate 16 attached to the upper surface portion of the dehydrating motor 7, and a brake drum provided above the support plate 16 and provided on the front end side of the rotating shaft 11. 17 and a swing arm 18 that is swingably provided on the brake support plate 16.

  The dehydration motor 7 is mounted and fixed upward on the base plate 4. On the upper surface of the frame 19 of the dehydrating motor 7, there are provided three screw holes 19a indicated by broken lines in FIG. These screw holes 19a and positioning projections 19b are formed at positions shifted in the circumferential direction of the motor frame 19 so as not to overlap with a cleaner portion 30 (see FIG. 5) described later in the vertical direction.

  The brake support plate 16 has a disk shape with a size covering the upper surface of the motor frame 19. As shown in FIG. 4, a central hole 16 c that is inserted through the rotating shaft 11 of the dehydrating motor 7 is formed in the central portion of the brake support plate 16, and corresponds to the screw hole 19 a and the positioning convex portion 19 b, respectively. The three screw insertion holes 16a and the fitting holes 16b are formed in the part to be performed. As a result, the brake support plate 16 is disposed on the motor frame 19 with the rotary shaft 11 inserted through the center hole 16c, and is positioned by fitting the positioning projection 19b into the fitting hole 16b. In this positioning state, the brake support plate 16 is attached and fixed to the dehydration motor 7 by screwing screws 21 into the screw holes 19a from the screw insertion holes 16a.

  A shaft support portion 22 for a swing arm 18 to be described later is provided at a portion near the outer periphery of the brake support plate 16. As shown in FIG. 3, the shaft support portion 22 is formed so as to slightly protrude upward in the brake support plate 16, and supports the swing arm 18 on the upper surface side by a shaft 22 a disposed on the raised portion. The swing arm 18 is disposed on the brake support plate 16 at a position facing the rear opening 1a side (see FIG. 2) of the outer box 1 (see FIG. 3). Further, a spring hooking piece 24 is formed at the periphery of the brake support plate 16 at a position approximately 180 degrees away from the shaft support portion 22.

  The brake drum 17 is made of a metal material such as iron, for example, and has a drum surface 25 having an outer peripheral drum surface 25 and a central cylindrical portion 26 concentrically. The brake drum 17 is located above the brake support plate 16 and is attached to the rotating shaft 11 of the dehydrating motor 7. Specifically, the distal end portion of the rotating shaft 11 has a so-called D-cut shape in which a flat portion 11a (see FIG. 4) is formed on a part of the outer peripheral surface thereof. The brake drum 17 locks the flat surface portion 11a with a screw 26a (see FIG. 5) screwed in the radial direction of the cylindrical portion 26 in a state where the rotary shaft 11 is inserted into the cylindrical portion 26 from below. Rotate integrally with the rotary shaft 11. On the other hand, the above-described shaft 5a of the dewatering basket 5 also has a flat surface portion (not shown) with a so-called D-cut on the tip side. As shown in FIG. 3, the brake drum 17 is locked to the shaft 5 a by a screw (not shown) screwed into the cylindrical portion 26 in a state where the shaft 5 a is inserted into the cylindrical portion 26 from above. . Thus, the cylindrical portion 26 of the brake drum 17 serves as a connector for connecting the rotating shaft 11 of the dehydrating motor 7 and the shaft 5a of the dewatering basket 5.

  The swing arm 18 is made of, for example, a metal plate and has an arc shape extending along the outer periphery of the drum surface 25 as a whole. The swing arm 18 includes a brake shoe 27 on its inner peripheral portion, and is supported at the base end portion so as to be swingable by the shaft 22 a of the brake support plate 16. A spring 28 is stretched between the tip 18 a of the swing arm 18 and the spring hooking piece 24 of the brake support plate 16. The spring 28 biases the brake shoe 27 in a direction in which the brake shoe 27 is pressed against the drum surface 25. A control wire 29 is attached to the distal end portion 18 a of the swing arm 18. With this control wire 29, the swing arm 18 is swung in conjunction with opening and closing of the dehydrating lid, so that the brake shoe 27 is brought into contact with and separated from the brake drum 17. Thus, the swing arm 18 swings between a braking position where the brake shoe 27 is pressed against the brake drum 17 (see FIG. 5) and an open position where the brake shoe 27 is separated from the brake drum 17 (see FIG. 1). To do. The brake shoe 27 extends in the circumferential direction of the brake drum 17 and is made of a friction material such as cork that applies a brake torque by being pressed against the drum surface 25.

  Now, the braking means 15 of this embodiment includes a cleaner unit 30 that removes dirt on the surface of the brake drum 17. Specifically, as shown in FIG. 3, a curved belt-like mounting portion 18 b is formed on the inner peripheral edge portion of the swing arm 18 so as to be folded upward, and the drum surface 25 in the mounting portion 18 b. The cleaner part 30 is provided in the opposing surface. The cleaner unit 30 is made of a material (for example, a nylon brush) suitable for removing the abrasion powder of the brake shoe 27 on the drum surface 25. The cleaner 30 may be made of other materials such as felt.

  The cleaner portion 30 is fixed to the mounting portion 18b on the proximal end side of the swing arm 18 with respect to the brake shoe 27 and at an upstream position in the rotation direction of the brake drum 17 indicated by an arrow in FIG. . The cleaner 30 and the brake shoe 27 are bonded and fixed to the mounting portion 18b with an adhesive, for example. The fixing means for these members 27 and 30 is not limited to the adhesive, but may be screwing means using screws (not shown). Further, as shown in FIG. 1, although the protrusion dimension (thickness dimension) Tc of the cleaner portion 30 toward the drum surface 25 is set larger than the protrusion dimension Tb of the brake shoe 27 (Tc> Tb), The tip of the cleaner portion 30 is set to a size that separates from the drum surface 25 (see reference numeral G1) when the swing arm 18 is opened. Therefore, in the open position of the swing arm 18, both the brake shoe 27 and the cleaner portion 30 are in a non-contact state from the drum surface 25. Further, when the swing arm 18 swings from the open position to the brake position, the cleaner unit 30 comes in contact with the drum surface 25 before the brake shoe 27. As is apparent from FIGS. 1, 4, and 5, even if the swing range of the swing arm 18 and the size and shape of the cleaner portion 30 are taken into consideration, the brake support plate 16 corresponds to the lower side of the cleaner portion 30. There is no through-hole penetrating in the thickness direction like the holes 16a and 16b described above in the vicinity of the portion to be performed.

  Here, in FIG. 6, the cleaner 30 and the brake shoe 27 viewed from the side of the brake drum 17 are schematically shown, and the swing arm 18 is not shown for convenience of explanation. As illustrated in the figure, the left cleaner portion 30 has a rectangular shape, and the right brake shoe 27 has a strip shape. The cleaner unit 30 and the brake shoe 27 are arranged apart from each other in the circumferential direction of the brake drum 17 (see reference numeral G2). Further, the width dimension Wc (vertical dimension) of the cleaner portion 30 is set to be, for example, larger than the width dimension Wb of the brake shoe 27 (Wc> Wb) and substantially the same as the width dimension Wd of the drum surface 25. (Wc≈Wd). For this reason, the cleaner unit 30 can be brought into contact with the entire friction surface of the drum surface 25 with the brake shoe 27.

Next, the operation of the above configuration will be described.
As described above, the dehydrating motor 7 rotates the dewatering basket 5 at a high speed, thereby centrifugally dehydrating the laundry stored in the dewatering basket 5. In this case, the brake drum 17 is also integrally rotated in the direction of the arrow shown in FIG. 1, and the swing arm 18 is in an open position where the brake shoe 27 is separated from the drum surface 25. Further, in this case, the cleaner unit 30 is also separated from the drum surface 25, so that the braking (load) by the braking means 15 is not applied to the rotation of the dewatering basket 5.

  Here, when the dehydrating lid is opened, the swing arm 18 is swung to the braking position by the control wire 29. At this time, the cleaner portion 30 first comes into contact with the drum surface 25, and then the brake shoe 27 comes into pressure contact (see FIG. 5). Further, in this case, even if the wear powder of the brake shoe 27 adheres to the drum surface 25, the wear powder is caused by the cleaner 30 on the upstream side (left side in FIG. 6) of the brake shoe 27 in the rotation direction of the drum 17. It is removed and falls downward from the cleaner 30 or from the gap G2 between the cleaner 30 and the brake shoe 27. For this reason, even if the brake shoe 27 is pressed against the drum surface 25, a stable pressure contact state of the brake shoe 27 can be obtained without causing problems such as deterioration of brake performance and brake squeal due to dirt on the surface of the drum surface 25. Can do.

  As described above, the braking means 15 of the present embodiment includes the rotating shaft 11 of the dehydrating motor 7 or the brake drum 17 provided between the rotating shaft 11 and the dewatering rod 5 and the rotating shaft 11 of the dehydrating motor 7. A brake support plate 16 provided in the dehydrating motor 7 so as to penetrate the brake drum 17 and a brake shoe 27 facing the brake drum 17 so as to swing between the brake position and the release position. 16 and a cleaner portion that contacts the brake drum 17 and removes dirt on the surface of the brake drum 17. The cleaner portion is provided integrally with the swing arm 18 and swings. The cleaner 30 is configured to be separated from the brake drum 17 as the arm 18 swings to the open position.

  According to this, the cleaner part 30 of the braking means 15 becomes a non-contact state with respect to the brake drum 17 in the open position where the brake drum 17 is not worn. For this reason, the cleaner 30 can be brought into contact with the surface of the brake drum 17 at the braking position without wastefully contacting the surface of the brake drum 17 to remove dirt (such as abrasion powder of the brake shoe 27) of the brake drum 17. it can. Accordingly, the life of the cleaner portion 30 can be extended, and the brake shoe 27 can be stably brought into pressure contact with the brake drum 17 to suppress a decrease in braking force.

  The braking means 15 is configured to contact the brake drum 17 in order of the cleaner portion 30 and the brake shoe 27 as the swing arm 18 swings to the brake position. According to this, the cleaner 30 is securely attached to the brake drum 17 for a sufficient period necessary for removing the abrasion powder adhering to the surface of the brake drum 17, that is, a period during which the brake shoe 27 is pressed against the brake drum 17. It can be made to contact and abrasion powder can be removed more reliably.

  With respect to the swing arm 18, a cleaner portion 30 and a brake shoe 27 are disposed apart from each other in the circumferential direction of the brake drum 17. According to this, it is possible to secure a region between the cleaner unit 30 and the brake shoe 27 where the wear powder removed by the cleaner unit 30 falls before reaching the brake shoe 27, and the removal of the wear powder by the cleaner unit 30. The effect can be enhanced.

  When the direction perpendicular to the circumferential direction of the brake drum 17 is the width direction, the width direction dimension of the cleaner 30 is set larger than the width direction dimension of the brake shoe 27. According to this, the cleaner part 30 can be reliably brought into contact with the friction region of the brake drum 17 pressed against the brake shoe 27.

  The brake support plate 16 has a structure having no through hole in the vicinity of the portion corresponding to the lower side of the cleaner portion 30. According to this, even if the abrasion powder removed by the cleaner unit 30 falls on the brake support plate 16, it can be prevented from entering the dehydrating motor 7 side.

  Although several embodiments of the present invention have been described, these embodiments are presented by way of example and are not intended to limit the scope of the invention. These embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the spirit of the invention. These embodiments and their modifications are included in the scope and gist of the invention, and are also included in the invention described in the claims and the equivalents thereof.

  In the drawings, 5 is a dewatering basket, 7 is a dewatering motor, 11 is a rotating shaft, 15 is a braking means, 16 is a brake support plate, 17 is a brake drum, 18 is a swing arm, 27 is a brake shoe, and 30 is a cleaner. Show.

Claims (5)

A dewatering trough containing the dehydrated material,
A dehydrating motor for rotating the dewatering basket;
In a two-tub washing machine comprising a braking means for braking against the rotation of the dewatering basket,
The braking means includes
A rotating drum of the dehydrating motor or a brake drum provided between the rotating shaft and the dewatering pad;
A brake support plate provided in the dehydration motor so as to penetrate the rotation shaft of the dehydration motor;
A brake shoe opposed to the brake drum, wherein the brake support is configured to swing between a brake position where the brake shoe is pressed against the brake drum and an open position where the brake shoe is separated from the brake drum. A swing arm provided on the plate;
A cleaner section that contacts the brake drum and removes dirt on the surface of the brake drum,
The cleaner portion is provided integrally with the swing arm, and is configured so that the cleaner portion is separated from the brake drum when the swing arm swings to an open position. Tank-type washing machine.   The brake means is configured to contact the brake drum in the order of the cleaner portion and the brake shoe as the swing arm swings to a braking position. Two-tub washing machine.   The two-tank washing machine according to claim 1 or 2, wherein the cleaner portion and the brake shoe are spaced apart from each other in the circumferential direction of the brake drum with respect to the swing arm. .   The width direction dimension of the cleaner portion is set to be larger than the width direction dimension of the brake shoe when the width direction is a direction orthogonal to the circumferential direction of the brake drum. Item 4. The two-tank washing machine according to any one of items 1 to 3.   The two-tank washing machine according to any one of claims 1 to 4, wherein the brake support plate has a structure having no through hole in the vicinity of a portion corresponding to the lower side of the cleaner portion.

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