KR0133605Y1 - A brake apparatus of a fully automated washing machine - Google Patents

Abstract

The present invention relates to a braking device for a power transmission device of a fully automatic washing machine.

In the conventional automatic washing machine power transmission device braking device using a one-way braking of the dehydration tank to brake the dehydration tank was used separately for the one-way bearing for the reverse braking of the dehydration tank, there was a factor in manufacturing cost increase and additional factors.

In addition, the band brake is not suitable for high speed dehydration and large washing capacity due to the weak durability and braking force.

The present invention adopts a drum brake which is excellent in durability and braking force (over 200Kg, cm) and bi-directional braking to solve the above-mentioned problems, to meet the trend of high speed dehydration and large washing capacity, and also uses one-way bearings. The cost reduction and assembly process shortened by eliminating the cost.

Description

Braking System of Fully Automatic Washing Machine

1 is a perspective view of the present invention.

2 is a cross-sectional configuration of the present invention.

Figure 3 is an exploded perspective view of the main part of the present invention.

4 is a partial cross-sectional view of the drum brake of the present invention,

(a) is the non-braking state (dehydration state).

(b) is the braking state (laundry state).

5 is a front view of the lever operating state of the present invention,

(a) is the braking state (laundry state).

(b) is the non-braking state (dehydration state).

6 is a cross-sectional configuration of a conventional design.

7 is a schematic configuration diagram of a braking device of FIG.

* Explanation of symbols for main parts of the drawings

2: dewatering 4: gear housing

6: brake drum 8: lower case

10: brake shoe 12: upper case

14,16: Shu 18,20: spring hook ball

22,24: flat part 26,28: support hole

30,32: lining 34: protrusion bar

36: Operation Cam 38,40: Insertion Groove

39, 41: pressure surface 42: threaded portion

44: anchor pin 46: groove

48,60: return spring 50,54: through hole

52: nut 56: cam lever

58: lever support piece 62,72: shaft pin

64,78: spring 66: rotating part

68: split pin 70: protrusion

74: Clutch Boss 76: Stopper

80: connecting piece 82: pin

The present invention relates to an improvement of a braking device used in a fully automatic washing machine. Specifically, the drum brake is configured to be operated by a cam lever and an operating cam, so that a large braking force can be obtained even with a small force. The product is prolonged in wear resistance and service life by co-molding and integrating by heating and pressing.

6 is a conventional cross-sectional view of a power transmission device for a full-automatic washing machine for controlling rotation of a washing plate (pulsator) and a dehydration tank. When dehydration, the band brake is moved when the lever 114 is moved by a drain motor (not shown). Band 116 is loosened, the stopper 120 is spaced apart from the clutch boss 122, the clutch spring 124 is wound (tightened) in the rotational direction, the drive shaft 126 and the dehydration shaft 118 is connected Therefore, the rotational force of the electric motor 130 is transmitted to the pulley 132, the belt 234, the pulley 136, the drive shaft 126, the spring clutch 124, and the dehydration shaft 118 in turn, and thus the dehydration tank 138. The centrifugal dehydration of the laundry while rotating at a high speed in one direction.

On the other hand, during washing, when the lever 114 is returned to its original position by the drain motor (not shown) and the spring, the stopper 120 flows in between the clicks of the clutch boss 122 so that the rotation of the clutch boss 122 is stopped. Since the clutch spring 124 that has been stopped and tightened is released, the power transmitted to the dehydration shaft 118 is interrupted, and the band 116 is pulled to stop the rotation of the dehydration tank 138 because the dehydration shaft 118 is braked.

Therefore, the forward and reverse rotational force of the electric motor 130 by the controller is decelerated and transmitted to the pulley 132, the belt 134, the pulley 136, the drive shaft 126, the reduction gear 140, and the washing shaft 142. The washing plate 144 rotates forward and reverse to wash the laundry.

In addition, when the washing or rinsing, the dehydration tank 138 flows due to the forward / reverse washing water flow, the forward / reverse rinsing water flow, the rotation of the sliding bearing 146, and the like, so that the dehydration tank 138 is braked by a band brake. .

The band brake has a configuration in which one end of the band 116 is fixed to the case 148 as shown in FIG. 7, and the other end of the band brake is fixed to the lever 114 supported by the spring 150. When the washing shaft 142 rotates in the (A) direction while the gear housing 118 is braked in the (C) direction, braking of the dehydration tank 138 is performed well, but the washing shaft 142 ) Rotates in the direction (B), the braking of the dehydration tank 138 is not made properly, so only one direction braking is possible. Since one-way bearings such as 6 degrees (156) are used, manufacturing costs are increased and assembly processes are increased.

In addition, the band brake is because the lining 154 adhered to the surface of the band 116 gradually weakens the adhesive force, not only the lining 154 is easily separated by impact, external pressure, frictional heat, secular variation, etc. It is relatively weak (about 100Kg, cm), and the braking force is insufficient at high speed dehydration of 1,000rpm or more, and therefore, the braking method is unsuitable for the high speed dehydration and the increase of the washing capacity.

Meanwhile, a brake device of a washing machine that improves braking efficiency and reduces vibration and noise by using a drum brake in a power transmission device of a washing machine has been disclosed in Korean Utility Model Publication No. 95-942, but this is a drain valve. Braking is released by the X-shaped compression means operated by an operating magnet (drain motor), and braking is released, and braking is performed by the elastic force of the spring. As a result, the braking force is weak and the braking force is fixed.

In addition, when the magnet protrudes, the braking speed is reduced because the X-shaped compression means is brazed by the braking spring built in the drum brake, and thus the braking speed is reduced. There is a problem that the braking force is falling, there is a risk.

In addition, as described above, the lining fixed to the surface of the shoe like a band brake is simply adhered with an adhesive, and thus the adhesive force is gradually weakened, so that the lining can be easily separated by impact, external pressure, frictional heat, secular variation, etc. There are problems such as short lifespan.

Accordingly, the present invention uses a drum brake having excellent durability and braking force and capable of two-way braking, instead of a band brake having a relatively low durability and braking force, in order to solve such a conventional problem, even with a small force using a cam lever and an operating cam. It is aimed to obtain a large braking force and to form the friction material lining integrally with the shoe by heating pressurization to extend the wear resistance and the service life of the brake.

In order to achieve the above object, the gear housing coaxial with the dehydration shaft is protruded to one side to form a brake drum, and a brake shoe is installed inside the brake drum to brake the drum, and to operate the shoe. After the shaft is projected out of the case, the cam lever is fixed to a relatively long length, and the clutch boss intermittent stopper is interlocked on one side of the cam lever, and a friction material having wear resistance and heat resistance on the web portion of the shoe has a predetermined width and a predetermined width. Lining and shoe were integrated by simultaneous molding by heating (about 150 ° C.) and pressurized to form a crescent moon by thickness, which will be described below in detail with reference to the accompanying drawings.

In the braking device of a fully automatic washing machine using a drum brake, the gear housing (4), which is the same shaft as the dehydration shaft (2), is extended to protrude to one side to form the brake drum (6) as shown in Figs. The one-way bearing fixed to the case 8 is removed so that the brake shoe 10 can be installed.

Figure 3 is an exploded perspective view of the brake shoe 10 applied to the present invention, the spring hook hole (18, 20) is formed on the upper left and right shoes 14, 16 symmetrical to each other in the crescent shape, Flat portions 22 and 24 and semicircular support holes 26 and 28 are formed at the upper and lower ends, and friction materials having wear resistance and heat resistance are provided on the webs 15 and 17 of the shoe. The linings 30 and 32 and shoe 14 and 16 are integrated by simultaneous molding by heating (approximately 150 ° C.) and pressurizing to a crescent shape in thickness.

The flat parts 22 and 24 and the support holes 26 and 28 of the left and right shoes 14 and 16 face each other, but the protruding rods 34 are disposed between the flat parts 22 and 24. Insert the left and right insertion grooves (38) and (40) of the operation cam (36) having a flat surface (22) and the pressing surface (39) (41) as shown in FIG. , The groove 46 of the anchor pin 44 having the threaded portion 42 between the support holes 26 and 28 is inserted, and then both ends of the return spring 48 are inserted into the left and right hook holes 18 and 20. The left and right shoes 14 and 16 are elastically supported by walking.

In addition, as shown in FIG. 2, the threaded portion 42 of the anchor pin 44 is inserted into one of the through holes 50 of the lower case 8, and then fixed by fastening with a nut 52 and another through hole of the lower case 8. The left and right linings 30 and 32 of the brake shoe 10 are positioned inside the brake drum 6 while rotatably inserting the protruding rod 34 of the operation cam into the brake 54. Allow braking.

The cam lever 56 is welded and fixed to the protruding rod 34 protruding outward of the lower case 8, and the cam lever support piece 58 is provided on the outer surface of the lower case 8 somewhat spaced from the cam lever 56. ), And then the cam lever 56 moves in the direction of the lever support piece 58 by inserting a return spring 60 having a stronger elastic force than the return spring 48 to the cam lever 56 and the lever support piece 58. When the actuating cam 36 rotates clockwise as shown in FIG. 5 (b) by allowing elastic support, the upper part of the left and right shoes 14 and 16 is anchored by the engagement of the pressing surfaces 39 and 41. The linings 30 and 32 are in contact with the brake drum 6 while the 44 is opened about the axis so that the dehydration shaft 2 is braked.

A shaft pin 62 is fixed to the upper side of the lever support piece 58 so as to protrude to one side, and the coil spring 64 and the rotation piece 66 are rotatably fitted to the shaft pin 62, and then the split pin 68 is inserted. To prevent separation of the rotation piece 66, and both ends of the coil spring 64 are engaged with the projection piece 70 of the rotation piece and the projection bar 34 of the operation cam as shown in FIG. ) Is lowered toward the protrusion bar 34.

A stopper 76 and a spring 78 for intermittent rotation of the clutch boss 74 are fitted to the lower shaft pin 72 of the rotation piece 66 so as to be elastically supported counterclockwise as shown in FIG. The upper side of the rotating piece 66 and the upper side of the cam lever 56 are brought into contact with both end portions of the connecting piece 80 as shown in FIG. 1, and then fixed by a pin 82 to the cam lever 56 and the rotating piece 66. Protruding rod 34 and the shaft pin 62 of the operation cam is to be linked to the center.

Reference numeral 84 is a pulley, 86 is a drive shaft, 88 is a wash shaft, 90 is a dehydration shaft, 92 is a drive shaft gear, 94 is a clutch spring, 96 is a reduction gear, 98 is a spline, 100 is a drain valve, 102 is a drain motor, 104 is a link, 106 is a through hole, 108 is a click, 110 is a sliding bearing, 112 is a wire to be.

The power transmission device of the present invention constructed as described above is installed in a predetermined position of a fully automatic washing machine as in the prior art, and then installs an outer cylinder, a dehydrating tank, a washboard, and the like on the upper portion, and a pulley of an electric motor (not shown) and a pulley of a power transmission device ( 84 is connected to the belt to transmit the rotational force, and also through the opening of the link 104 located between the drain valve 100 and the drain motor 102 as shown in FIG. By using the end of the cam lever 56 in the 106, it will be described below the operation and effect of the present invention.

In the case of washing stroke or rinsing stroke (stroke other than dehydration), the link 104 is moved to the right by a spring (not shown) built in the drain valve 100 as shown in FIG. The lever 56 and the pivoting piece 66 are in a state in which the lever 56 and the rotation piece 66 are moved clockwise around the protruding bar 34 and the pin shaft 62 by the strong elastic force of the return spring 60, 39 and 41 rotate clockwise to press the flat portions 22 and 24 to expand the brake shoe 10, so that the left and right linings 30 and 32 brake as shown in FIG. 4 (b). Since the frictional contact with the inner circumferential surface of the drum 6, the gear housing 4 is braked, and the flow of the dewatering shaft 2 and the dewatering tank coaxial with the gear housing 4 is prevented.

In addition, the stopper 78 enters between the clicks 108 to stop the rotation of the clutch boss 74, and the clutch spring 94 is released to increase its diameter, thereby disconnecting the drive shaft 86 and the dehydration shaft 90 and transmitting power. Since the dehydration tank is braked, the high speed rotational force transmitted to the pulley 84 is transmitted to the drive shaft 86, the reduction gear 96, and the washing shaft 88 so that the washing plate is rotated forward and reverse to wash or rinse the laundry. do.

In the above case, the forward and reverse rotational force is transmitted to the dehydration tank, the dehydration shaft 2 and the gear housing 4 by washing water flowing forward and reverse by the washing plate or by the rinsing water or the sliding bearing 110, respectively. And braking is achieved by the brake shoe 10 and the brake drum 6 having a self-energizing active, thereby preventing the flow of the dehydration tank.

In addition, durability and braking force (200Kg, cm or more) is increased, so even if washing water, rinsing water, etc. increase due to the increase of washing capacity, good braking is achieved, and because the use of one-way bearing is unnecessary, assembly is easy and manufacturing cost Can be reduced.

As shown in FIG. 4 (a) and (b), the proximity and working distances of the pressing surfaces 39 and 41 of the actuating cam 36 and the flat parts 22 and 24 of the shoe 14 and 16 are as shown in FIG. Since the braking speed is very short, the braking speed is very fast, and the dehydration tank is braked by the above process even when the door switch is operated or the dehydration is completed by opening the door of the washing machine during the dehydration.

In the above, the left and right linings 30 and 32 are integrated with the shoe 14 and 16 by heat and pressure rather than by adhesive, and also exhibit heat resistance and abrasion resistance. Deformation and separation from the shoes 14 and 16 are prevented and the life is increased.

In the case of the dehydration stroke, the drain motor 102 pulls the wire 112 while the drain motor 102 decelerates and rotates by the micom of the washing machine, so that the drain valve 100 is drained while the drain valve 100 is opened and the link 104 connected to the wire 112. In addition, the cam lever 56 fitted in the through hole 106 of the link is rotated counterclockwise around the protruding rod 34 as shown in FIG. 5 (b).

The brake shoe 10 in which the actuating cam 36 rotates in the counterclockwise direction and the pressing surfaces 39 and 41 and the insertion grooves 38 and 40 are in a vertical state and the action force of the actuating cam 36 is removed is Since it is contracted by the return spring 48, the left and right linings 30 and 32 are spaced apart from the inner circumferential surface of the brake drum 6 as shown in FIG. 4 (a), and the braking of the drum 6 is released. The rotating boss 66 interlocked with the cam lever 56 rotates counterclockwise around the shaft pin 62 and the stopper 76 is spaced apart from the click 108 of the clutch boss 74. Is rotated, the diameter of the clutch spring 94 is reduced and the drive shaft 86 and the dehydration shaft 90 are connected, so that the high-speed rotational force transmitted to the pulley 84 is driven by the drive shaft 86 and the spring clutch 94. The dehydration shaft (2) is delivered to the dehydration tank so that the dehydration tank is rotated at a high speed in one direction to centrifugally dehydrate the laundry.

When the dehydration is completed, the drain motor 102 becomes neutral by the control command of the microcomputer, the drain valve 100 is closed by the spring (not shown) built in the drain motor 102, and the link 104 is connected to the wire. The stopper 76 is moved to the right by the 112 and the cam lever 56 and the lever support piece 58 are moved to the right as shown in FIG. 5 (a) by the strong elastic force of the return spring 60. The power transmission between the drive shaft 86 and the dehydration shaft 90 is interrupted by entering the click 108, and the brake shoe 10 is opened by the rotation pressing force of the operation cam 36, and the dehydration tank is braked to wash and rinse. It becomes possible.

As described above, the present invention is capable of obtaining a large braking force even with a small force by the action of the cam lever and the actuating cam, instead of braking by the return force of the spring, as shown in FIG. 4 (a) (b). The close distances and working distances of the pressing surfaces 39 and 41 of the actuating cam 36 and the flat parts 22 and 24 of the shoes 14 and 16 are very short, so that a rapid braking force can be obtained, and thus the braking speed is increased. It is very fast, and the lining and shoe are integrally formed by heating and pressurizing, so that the wear resistance and the service life of the brake are increased.

Claims (1)

In the braking device of a fully automatic washing machine using a drum brake, a brake drum (6) is formed by protruding the gear housing (4) coaxial with the dehydration shaft (2) to one side, and being positioned inside the brake drum (6). The brake shoe 10 for braking (6) is installed in the case 8, the anchor pin 44 of the brake shoe 10 is fixed to the case 8, and the aperture cam 54 of the case After the projection bar 34 is rotatably inserted, the cam lever 56 is fixed, and the return spring 60 is inserted into the cam lever 56 and the lever support piece 58 fixed to the case, and the lever support piece ( The pivoting piece 66 of which the stopper 76 was resiliently fitted is attached to the shaft pin 62 of 58, and the pivoting piece 66 and the cam lever 56 are connected by the connecting piece 80, and the shoe web 15 At the same time, the linings 30, 32 and the shoe 14, 16 are integrally formed by simultaneously molding a friction material having abrasion resistance and heat resistance at the The braking device for a fully automatic washing machine.