KR200277955Y1 - Power unit of washing machine - Google Patents

Abstract

The present invention relates to a power unit of a washing machine, the purpose of which is a simple structure that can achieve power transmission and speed change and power switching, and the connecting member to easily combine the lifting motor shaft and the lifting shaft that variable power It provides a power unit of the washing machine provided, the gear unit is formed and the dehydration contraction is provided in the hollow, the washing shaft is installed in the dehydration shaft, the first lower pulley is fixed to the washing shaft and the outer peripheral surface diameter is reduced up; 1 The first upper pulley which is provided to be able to hang the V-belt corresponding to the lower pulley, is interlocked with the washing shaft, can move up and down, and is engaged with the gear part of the dehydration shaft, and is elastically supported by the support spring provided on the outside. And a second upper pulley fixedly coupled to a lateral rotational axis of the first upper pulley and having a reduced outer circumferential surface diameter, and a second upper pulley. The second lower pulley installed on the outer circumferential surface of the rotating shaft so that the diameter of the outer circumferential surface is reduced upwardly to be able to hang the belt, and the lower circumferential surface of the second lower pulley is installed on the lower circumferential surface of the rotating shaft so as to be able to descend. An elevating rotation shaft, which is inserted inside the nut to elevate the elevating nut, and an elevating motor shaft which is connected to the elevating rotation shaft to forward and reverse rotation thereof, so as to connect the elevating motor shaft of the elevating motor with the elevating rotation shaft. It is a configuration provided with a connection member provided between.

Description

Power unit of washing machine

The present invention relates to a washing machine, and more particularly, to a power unit of a washing machine to easily transfer the power of the drive motor to a dehydration tank or a pulsator as a simple structure.

In general, a washing machine performs washing strokes and dehydrating strokes by rotating a pulsator and a dehydration tank by using a rotational force of a driving motor, and a main body is provided to form an exterior, and an upper side of the washing machine is opened so that washing water can be filled therein. Cylindrical water tank is installed. And inside the tank is installed a dewatering tank that is rotatably mounted, and the inner bottom of the dewatering tank is provided with a pulsator for forward and reverse rotation to form a washing water flow. The dehydration tank and the pulsator are rotated by receiving the power of the driving motor by the power unit provided at the lower side of the tank.

1 is a cross-sectional view showing a clutch of such a conventional washing machine. As shown in the figure, the clutch 20 constituting a part of the power unit is installed on the bottom of the water tank 10, the cylindrical case 21 is formed to form the appearance, the inside of the case 21 is hollow It is provided as a dehydration shaft 23 is connected to the dehydration tank (11). In addition, a washing shaft 22 connected to the pulsator 12 is installed inside the dehydration shaft 23. The washing shaft 22 is divided into upper and lower washing shafts 22a and lower washing shafts 22b. It is made between the reduction gear 29 is installed between. In addition, a lower end of the lower washing shaft 22b is provided with a pulley 24 for transmitting the power transmitted from the driving motor (not shown) to the washing shaft 22 or the dewatering shaft 23.

On the other hand, a brake band 25 is provided on the outer circumferential surface of the dehydration shaft 23 so as to brake the dehydration shaft 23, and a brake lever 26 for operating the brake band 25 is a case 21. It is installed outside of. In addition, a clutch spring 27 is provided on the lower outer circumferential surface of the dewatering shaft 23 so as to be connected to the dewatering shaft 23 and the washing shaft 22 which are rotated, respectively, and operate the clutch spring 27. Clutch lever 28 is installed so that.

In the conventional washing machine configured as described above, the washing shaft 22 receives the power of the driving motor (not shown) by the clutch 20 at the washing stroke, and rotates the pulsator 12 connected to the upper end of the washing machine 22 forward and backward. . Therefore, the washing stroke is performed by friction between the laundry, the washing water, and the dehydration tank 11, and during dehydration, the dehydration shaft 23 and the washing shaft 22 are closely contacted with each other due to the compression of the clutch spring 27, thereby rotating at high speed. It is to perform dehydration administration.

However, such a conventional washing machine has a complicated internal configuration of the clutch and requires a large number of components. As a result, the manufacturing process is complicated, and the manufacturing cost is high, resulting in an increase in the production cost of the washing machine.

The present invention is to solve such a problem, the purpose of the present invention is a simple structure that can achieve power transmission and speed change and power switching, the lifting motor shaft inherent in the lifting motor switching power is combined with the lifting It is to provide a power unit of the washing machine provided with a connection member so that the rotary shaft can be easily coupled.

1 is a cross-sectional view showing a clutch of a conventional washing machine.

2 is a cross-sectional view showing the inside of the washing machine according to the present invention.

3 is a sectional view showing a power unit of the washing machine according to the present invention.

Figure 4 is an exploded perspective view showing a power unit of the washing machine according to the present invention.

5 is an exploded perspective view showing a connecting member according to the present invention.

Figure 6 is an exploded perspective view showing another embodiment according to the present invention.

Figure 7 is an exploded perspective view showing another embodiment according to the present invention.

Explanation of symbols on the main parts of the drawings

150: V-belt 200: power unit 210: case 220: cover

300: washing shaft 320: dewatering shrinkage 330: support spring 350: first upper pulley

360: first lower pulley 400: drive motor 410: rotary shaft 420: second upper pulley

430: second lower pulley 450: elevating nut 470: elevating motor 471: elevating motor shaft

480: lifting shaft 490: support protrusion 500: connecting member 510: internal bolt

520: Outer bolt part 530: Tightening nut part 540: Inner nut part 600: Connecting member

610: coupling portion 620: coupling portion 630: coupling bolt 640: coupling nut

700: connecting member 710: engaging projection 720: engaging groove

The present invention for achieving the above object, the dehydration tank is installed to be rotatable in the interior of the tank, the pulsator provided to form a wash flow in the interior of the dehydration tank, the pulsator and the dehydration tank can be rotated In the washing machine is provided with a drive motor provided with a rotating shaft for forward and reverse rotation, and a power unit for transmitting the power of the drive motor to the pulsator and the dehydration tank by a V-belt, the power unit is connected to the dehydration tank and one end The dehydration shaft is formed in the gear portion is provided in the hollow, the dehydration shaft is installed inside the one end is connected to the pulsator and the other end is fixed to the other end of the washing shaft and the other end of the washing shaft and the outer peripheral surface diameter An outer circumferential surface corresponding to the first lower pulley and the first lower pulley that is contracted upward to hang the V-belt A first upper pulley having a gear part formed on an upper surface of the washing shaft so as to be engaged with the laundry shaft and to move up and down, and to be engaged with the gear part of the dewatering shaft; and downward of the first upper pulley. The support spring is installed on the outer periphery of the dehydration shaft and elastically coupled to the rotary shaft of the drive motor provided in the lateral direction of the first upper pulley supported downward by the support spring, the outer peripheral surface diameter is reduced A second upper pulley and a second lower pulley installed on an outer circumferential surface of the rotary shaft so as to correspond to the second upper pulley so that an outer circumferential diameter thereof is reduced upwardly and interlocked with the rotary shaft so as to move up and down; 2 It is provided to support the lower surface of the lower pulley and the lifting nut provided with a screw therein is inserted into the lifting nut. An elevating rotation shaft provided with an external screw to elevate the elevating nut, an elevating motor shaft provided with an elevating motor shaft connected to the elevating rotation shaft to reversely rotate the elevating rotation shaft, and the elevating motor shaft and the elevating rotating shaft of the elevating motor. It characterized in that the connection member is provided between them so as to connect the.

Hereinafter, with reference to the accompanying drawings will be described in detail a preferred embodiment according to the present invention.

2 is a cross-sectional view showing the inside of the washing machine according to the present invention, Figure 3 is a cross-sectional view showing a power unit of the washing machine according to the present invention, Figure 4 is an exploded perspective view showing a power unit of the washing machine according to the present invention. And Figure 5 is an exploded perspective view showing a connecting member according to the present invention. In addition, Figure 6 is an exploded perspective view showing another embodiment according to the present invention, Figure 7 is an exploded perspective view showing another embodiment according to the present invention.

First, an embodiment of the present invention will be described with reference to FIGS. 2, 3, 4, and 5. The washing machine of the present invention is provided with a main body 100 forming an appearance, and a water tank 110 supported by a suspension rod 130 is installed inside the main body 100. And the dehydration tank 120 is provided in the interior of the water tank 110, the pulsator 140 is installed on the inner bottom surface.

First, a power unit 200 for selectively transmitting power to the dehydration tank 120 or the pulsator 140 at the time of washing or dehydration is installed in the lower portion of the water tank 110. The power unit 200 has a case 210 having a lid 220 installed on an upper surface of the power unit 200, and the components are installed inside the case 210. The cover 220 is coupled to the screw 230, the cover 220 is coupled to the bottom of the water tank 110 by a bolt 240.

Hereinafter, the power unit 200 will be described in more detail. The power unit 200 includes a dehydration shaft 320 having an upper end thereof coupled to the dehydration tank 120 through the cover 220 and forming a hollow 320a. The dehydration shaft 320 has a gear portion 320b formed at the lower end thereof, and is coupled to the hollow 320a of the dehydration shaft 320, and the upper end thereof is extended to be coupled to the pulsator 140. It is supported by the bearing 310 between the inner surface of the extending to the lower portion of the dehydration shaft 320 and the screw portion (300a) is formed at the lower end, but the dehydration shaft 320 is fitted to the outer peripheral surface of the portion extending downward The washing shaft 300 having the groove 300b is installed.

On the other hand, the lower screw thread (300a) of the washing shaft 300, the lower surface is wide, the upper surface is narrow, the circumferential surface is inclined upwardly inwardly, the first lower pulley 360 is coupled and fixed. And the fitting groove (300b) of the washing shaft 300 is provided in the form corresponding to the first lower pulley (360) to the upper portion is fitted into the fitting groove (300b) of the washing shaft (300) fitting protrusions (up and down) A first upper pulley 350 having a 350b formed therein is provided, and a first upper pulley 350 having a gear portion 350a of the dehydration shaft 320 is installed at an inner circumference of the upper surface of the first upper pulley 350. .

In addition, the outer side of the dehydration shaft 320, the upper end is supported on the bottom of the water tank 110, the lower end is supported by the first upper pulley 350, the support spring 330 is installed. In addition, a bearing 340 is installed between the support spring 330 and the first upper pulley 350 to prevent the rotational force of the first upper pulley 350 from being transmitted to the support spring 330. In order to settle) the upper surface of the first upper pulley 350 is formed with a circular support groove 350c.

In addition, the side of the above-described components is installed a drive motor 400 for generating power. The drive motor 400 is fixed to the cover 220, the rotating shaft 410 is extended into the case 210. The rotating shaft 410 is formed with a screw portion 410a in the middle portion, and the lower portion is formed by stepping, and the fitting groove 410b having a lower opening is formed on the upper outer peripheral surface of the stepped portion.

The rotation shaft 410 is provided with a second upper pulley 420 and a second lower pulley 430 that operate in correspondence with the first upper pulley 350 and the second lower pulley 360 described above.

First, the second upper pulley 420 is screwed and fixed to the threaded portion 410a of the rotation shaft 410 of the drive motor 400, and the second lower pulley 430 is fitted into the fitting groove 410b of the rotation shaft 410. The fitting protrusion 430a is formed on the inner circumferential surface of the second lower pulley 430 to be fitted to the fitting groove 410b. In addition, a lifting motor 470 that generates power so that the second lower pulley 430 can be lifted up and down is installed at the bottom of the case 210 at a lower portion of the second lower pulley 430.

On the other hand, the lifting motor 470 is provided with a lifting motor shaft 471 extending upward, the lifting motor shaft 471 is provided with a lifting shaft 480, the lifting shaft 480 is hollow 480b. It is provided with a screw portion (480a) on the outside, it is not easy to form integrally with the lifting motor shaft (471). As a result, the lifting motor shaft 471 and the lifting rotation shaft 480 are formed separately, and in order to connect them, the connecting member 500 is required. The connecting member 500 is projected upward by a smaller diameter at the tip of the elevating motor shaft 471 and is provided with an inner bolt portion 510 provided with a right screw on the outer circumferential surface, and a left screw provided on the outer circumferential surface of the elevating motor shaft 471. An external bolt portion 520 is provided.

In addition, the inner nut part 540 and the fastening nut part 530 are provided on the lifting and lowering shaft 480 to correspond to the inner bolt part 510 and the outer bolt part 520. The inner nut part 540 is opened downward in the lifting shaft 480 so that the inner bolt part 510 can be inserted therein, and is provided with a right screw. In addition, the fastening nut part 530 is a hollow tube installed on the outer circumferential surface of the elevating rotation shaft 480 to be freely rotated, and a left hand thread is formed in the fastening nut 530 to be fastened to the outer bolt part 520. In addition, the locking jaw 550 is provided to extend outwardly of the lower end of the lifting and lowering rotation shaft 480 so that the fastening nut part 530 does not deviate to the outside, and the fastening nut part 530 has a corresponding locking part 531. Is prepared.

The connecting member 500 configured as described above rotates the inner bolt part 510 of the elevating motor shaft 471 and the inner nut part 540 of the elevating rotation shaft 480 in the right direction, and then tightens the tightening nut part 530. After the fitting to the external bolt portion 520 is rotated in the left direction to be fastened to prevent the fastening is loosened by the lifting motor 470 to reverse rotation.

The lifting shaft 480 fastened by the connecting member 500 forms a hollow 480b therein, and the rotation shaft 410 of the driving motor 400 is partially inserted into the hollow 480b. The bearing 460 is installed between the rotating shaft 410 of the driving motor 400 so as not to interfere with each other. A screw portion 480a is formed on an outer circumferential surface of the lifting shaft 480 of the lifting motor 470, and the screw portion 480a supports the lower portion of the second lower pulley 430 to lift and lower the rotating shaft of the lifting motor 470. A lifting nut 450 is provided so that the lifting force generated by the rotation of 480 extends to the second lower pulley 430.

In addition, a bearing 440 is provided between the lifting nut 450 and the lower surface of the second lower pulley 430, and the bearing 440 has a rotational force of the lifting nut 450 of the second lower pulley 430. Is not delivered to). In addition, a support protrusion 490 extending upward is formed in the case 210 of the lifting motor 450, and a support hole 450a into which the support protrusion 490 is fitted is formed in the lifting nut 450. The support protrusion 490 and the support hole 450a are used to prevent the lifting nut 450 from being rotated together by the rotation of the lifting rotation shaft 480 of the lifting motor 470.

Therefore, the lifting nut 450 does not exert any rotational force, and can only perform the up and down driving. Each pulley 350, 360, 420, 430 is connected to each other by a V-belt 150 with considerable tension.

6 and 7 is the same as another embodiment of the present invention showing another form of the connection member and another embodiment other components except the connection member is the same as the embodiment of the present invention use the same reference numerals and the same name. . First, description will be given with reference to FIG. 6. The connecting member 600 is provided between the lifting motor shaft 471 extending upwardly of the lifting motor 470 and the lifting rotating shaft 480 coupled thereto, and the connecting member 600 of the present embodiment is provided as a round rod. The elevating motor shaft coupling portion 610 in which the tip of the elevating motor shaft 471 is removed in the axial direction and the elevating rotation shaft coupling portion 620 in which the tip of the elevating rotation shaft 480 is removed in the axial direction to correspond thereto are provided. The coupling holes 611 and 621 are formed to communicate with each other in the radial direction of the lifting motor shaft coupling part 610 and the lifting rotation shaft coupling part 620. In addition, the coupling motor 611 and 621 are coupled to the coupling bolt 630 and the coupling nut 640, so that the lifting motor shaft 471 and the lifting shaft 480 are easily coupled.

Next, a description will be given with reference to FIG. 7. The connecting member 700 has a coupling protrusion 710 protruding into a quadrangle and a coupling protrusion 710 inserted into a tip of the elevating rotation shaft 480 at the tip of the elevating motor shaft 471 extending upward of the elevating motor 470. The coupling groove 720 is opened so that it can be fixed, and the coupling protrusion 710 and the coupling groove 720 are interfitted. As a result, the rotational force of the elevating motor 470 is transmitted to the elevating rotation shaft 480 with a simple structure.

Operation of the power unit 200 of the washing machine according to the present invention configured as described above is as follows.

First, when washing, since the first upper pulley 350 is always supported downward by the support spring 330, the lifting motor 470 is driven to lower the lifting nut 450 to the second lower pulley 430. ) Moves downward along with the lifting nut 450 along the fitting groove 410b of the drive shaft 400.

At this time, the first upper pulley 350 is lowered downward along the fitting groove 300b of the washing shaft 300 by the tension by the V-belt 150 and the elastic force of the support spring 330. ) And the gap G1 between the first lower pulley 360 becomes narrower and the distance G2 between the second upper pulley 420 and the second lower pulley 430 becomes wider (G1 < G2).

Therefore, the radius of rotation of the washing shaft 300 becomes wider, and the radius of rotation of the rotating shaft 410 of the drive motor 400 becomes narrower. Therefore, if the rotating radius of the washing shaft 300 is twice the rotation radius of the rotating shaft 410 of the drive motor 400, if the driving motor 400 rotates at about 800rpm washing shaft 300 is about 400rpm Rotation to allow the laundry administration to be performed.

Next, during dehydration, when the lifting motor 470 is driven in the opposite direction as when washing, the lifting nut 450 is lifted upward, and thus, the second lower pulley 430 is the rotation shaft 410 of the driving motor 400. Along the lifting nut 450 along the fitting groove 410b is moved upward.

At this time, the first upper pulley 350 is elevated upward along the fitting groove 300b of the washing shaft 300 by the tension of the V-belt 150, and thus the lower gear part 320b of the dewatering shaft 320 is disposed. Is engaged with the gear portion 350a of the first upper pulley 350, so that the distance G1 between the first upper pulley 350 and the first lower pulley 360 becomes wider, whereas the second The gap G2 between the upper pulley 420 and the second lower pulley 430 becomes narrow. (G1> G2)

Therefore, the rotation radius of the washing shaft 300 becomes narrow, and the rotation radius of the rotation shaft 410 of the drive motor 400 becomes wide. Therefore, if the rotation radius of the rotation shaft 410 of the drive motor 400 is 1/2 of the rotation radius of the washing shaft 300 when the drive motor 400 rotates at about 800rpm as in the washing stroke washing The shaft 300 is rotated at a high speed of about 1600rpm so that the dehydration stroke is performed.

By appropriately controlling the number of revolutions of the lifting motor 470 of the above-mentioned rotation radius, by appropriately controlling the lifting width of the second lower pulley 430, the rotational force is appropriately adjusted by washing of steel, medium, and weak during washing. Not only can it be sufficiently controlled, but also, when dewatering, it is possible to perform more powerful dehydration stroke by adjusting the rotation radius.

In addition, the brake function after the end of dehydration is also possible by the control of the drive motor 400, otherwise it is possible by adjusting a part of the tension of the V-belt 150. In this case, the tension may be adjusted by using the power of the drain motor (not shown) to perform the braking function by pulling or pushing the V-belt 150.

The washing machine power device of the present invention as described above is provided to achieve power transmission, speed change, and power switching as a simple structure, and there is an advantage in that the manufacturing process and the manufacturing cost are reduced due to the simplification of the configuration. In addition, since the lifting motor shaft and the lifting shaft are separated from each other and a connecting member is provided therebetween, the lifting motor shaft and the lifting shaft can be easily manufactured and installed, and the fastening of the lifting motor shaft can be prevented from loosening. This has the advantage of improving reliability.

Claims (5)

A dehydration tank installed to be rotatable inside the tank, a pulsator provided to form a washing water flow in the dehydration tank, a drive motor provided with a rotating shaft for forward and reverse rotation to rotate the pulsator and the dehydration tank, and In the washing machine equipped with a power unit for transmitting the power of the drive motor to the pulsator and the dehydration tank by a V-belt, The power unit has a dehydration shaft, one end of which is connected to the dehydration tank and the other end of which is formed with a gear part and is provided in a hollow; A washing shaft installed in the dehydration shaft and having one end connected to the pulsator and the other end extending out of the dehydration shaft; A first lower pulley fixedly coupled to the other end of the laundry shaft and having an outer circumferential surface diameter thereof reduced; The outer circumferential surface diameter is reduced down to correspond to the first lower pulley and is installed on the outer circumferential surface of the washing shaft so as to be able to move up and down, and to be able to move up and down, and to be engaged with the gear part of the dehydration shaft. A first upper pulley formed with an additional portion, The support spring is installed on the outer periphery of the dehydration shaft so as to support the first upper pulley downwardly elasticity, and fixedly coupled to the rotary shaft of the drive motor provided in the lateral direction of the first upper pulley supported downward by the support spring And a second upper pulley whose outer circumferential surface is reduced in diameter, A second lower pulley installed on an outer circumferential surface of the rotating shaft so that the outer circumferential diameter thereof is reduced in size so as to be able to hang the V-belt corresponding to the second upper pulley, and interlocked with the rotating shaft so as to move up and down, and a lower surface of the second lower pulley. The lifting nut is provided to support and has a screw inside, An elevating rotary shaft which is inserted into the elevating nut and provided with an external screw to elevate the elevating nut; A lift motor provided with a lift motor shaft connected to the lift shaft to rotate the lift shaft forward and backward; The power unit of the washing machine, characterized in that the connecting member is provided between the lifting motor shaft and the lifting rotation shaft of the lifting motor provided therebetween. According to claim 1, wherein the connecting member is formed on the outer circumferential surface of the elevating motor shaft and the outer bolt portion, and the inner side projected to a reduced diameter at the tip of the elevating motor shaft to form a screw thread in the opposite direction to the outer bolt portion A bolt part, an inner nut part formed by forming a screw thread inside the lifting and lowering shaft to be fastened to the inner bolt part, and a screw thread in a direction opposite to the inner nut part to be fastened to the outer bolt part. The power unit of the washing machine, characterized in that the fastening nut is rotatably fixed to the outside of the lifting and lowering shaft. The method of claim 1, wherein the connecting member is an elevating motor shaft engaging portion provided with a coupling hole in the radial direction is cut in the axial direction about the tip of the elevating motor shaft, and the elevating motor shaft engaging portion can be combined to form a round rod An elevating rotary shaft coupling portion provided with a coupling hole to cut the tip of the elevating rotary shaft in the axial direction and communicate with the coupling hole, and a fastening bolt and a fastening nut provided to be fastened through the coupling hole are provided. Power unit of the washing machine. The method of claim 1, The connecting member is a power unit of the washing machine, characterized in that the coupling groove provided to have an outer circumferential surface of the polygon inside the lifting shaft, and the engaging projection protruding at the end of the lifting motor shaft to be fixed to the coupling groove. 5. The power unit of claim 4, wherein the coupling protrusion is provided with a square bar, and the coupling groove is provided with a square groove so that the coupling protrusion is fitted.