JP4385909B2 - Washing machine - Google Patents

Description

  The present invention relates to a washing machine having a function of washing and dewatering clothes.

  Conventionally, a clutch mechanism has been used to switch between washing and dewatering (see, for example, Patent Document 1).

  FIG. 10 shows a general fully automatic washing machine, and its configuration will be described below. The washing machine main body 1 is provided with a water receiving tub 3 suspended by a suspension 2 so as to prevent dehydration vibration inside, and a washing / dehydrating tub 4 is rotatably disposed in the water receiving tub 3. An agitating blade 5 for agitating the laundry is rotatably disposed at the inner bottom of the washing and dewatering tank 4. The washing and dewatering tub 4 is disposed so as to be coaxial with the dewatering shaft 7 supported by a bearing 6 provided at the bottom of the water receiving tub 3, and is fixed to the upper end of the dewatering shaft 7.

  The stirring blade 5 is fixed to the upper end portion of the washing shaft 9 which is disposed in the hollow portion of the dewatering shaft 7 so as to be coaxial with the dewatering shaft 7 and is supported by a bearing 8 provided in the hollow portion of the dewatering shaft 7. ing. The lower end of the washing shaft 9 is connected to the output side of the speed reduction mechanism 10. Further, the upper end of the input shaft 14 whose lower end is connected to the rotor 15 of the drive motor 11 is connected to the input side of the speed reduction mechanism 10.

  The clutch mechanism is provided with a slide portion (not shown) such as a spline at the lower part of the dewatering shaft 7, and when the washing and dewatering tub 4 rotates, the slide plate 12 fitted thereto is lowered by a spring (not shown). The rotation of the rotor 15 is transmitted to the dehydrating shaft 7 by engaging the protrusion 18 provided on the lower end of the slide plate 12 with the protrusion 17 provided on the rotor 15.

  Further, when the stirring blade 5 rotates, the slide plate driving means 13 moves the slide plate 12 upward, so that the projection 18 provided at the lower end of the slide plate 12 is removed from the projection 17 provided on the rotor 15. The rotation of the rotor 15 is not transmitted to the dehydrating shaft 7, and the stirring blade 5 is rotated through the input shaft 14, the speed reduction mechanism 10, and the washing shaft 9.

  Here, the slide plate driving means 13 is driven by the geared motor 13a, but it is necessary to move the slide plate 12 up and down by converting the movement of the geared motor 13a performed on a horizontal plane into a vertical motion. For example, the slide plate driving unit 13 supports the slide plate 12 from below and has a cylindrical cam 13b having an obliquely cut groove (not shown) on its side surface, and is inserted into the groove of the cylindrical cam 13b and is placed at a stationary part. It comprises a guide pin 16 provided and a clutch lever 13c that transmits the motion of the geared motor 13a to the cylindrical cam 13b.

The geared motor 13a includes a rotation lever (not shown) and one switch for detecting the rotation position of the rotation lever. The clutch lever 13c is connected to the rotation lever of the geared motor 13a, and is driven by the rotation of the rotation lever to reversely rotate the cylindrical cam 13b. As a result, the cylindrical cam 13b moves up and down while supporting the inclined groove portion supported by the guide pins 16, thereby moving the slide plate 12 up and down.
JP 2003-135888 A

  However, in such a conventional clutch mechanism of a washing machine, since there is only one switch, it can be controlled only by the operation time from the off position, and it has not been possible to confirm whether it is stopped at an accurate position. .

  SUMMARY OF THE INVENTION An object of the present invention is to solve the above-described conventional problems, and to provide a washing machine capable of reliably detecting a clutch switching operation position and performing accurate clutch switching.

In order to solve the above-described conventional problems, a washing machine of the present invention includes a hollow dewatering shaft that rotates a washing and dewatering tub, a stirring blade disposed in the washing and dewatering tub, and the dewatering shaft. A washing shaft disposed on the same axis, a slide plate that moves up and down to switch the rotation of the drive motor to one of the dewatering shaft and the washing shaft, a clutch lever that moves the slide plate up and down, and the clutch lever and a geared motor having a rotary lever which drives the front SL has a mediate member having elasticity to mediate the operation of rotating the lever of the clutch lever and the geared motor, the rotating lever is freely rotatable in only one direction the geared motor, the rotary lever and the cylindrical cam having at least two recesses with synchronized rotation, at least two having a projecting portion for the concave portion and the fitting And a switch, the two switches are each configured to turn off when the recess and the projection is fitted, when not fitted is turned on, the two said rotation lever each switch at a position off The rotation of the drive motor is switched to either the dehydrating shaft or the washing shaft by stopping the motor, and when the switching operation of the clutch is reliably detected by two switches and at the same time the power is turned on When stopping at other than the previous contact, the switching time until returning to the initial state can be shortened.

  The washing machine of the present invention can realize a washing machine with reduced clutch switching reliability and reduced time required for switching.

A first invention comprises a hollow dewatering shaft for rotating a washing and dewatering tub, a washing shaft disposed on the same axis as the dewatering shaft by rotating a stirring blade disposed in the washing and dewatering tub, A slide plate that moves up and down to switch the rotation of the drive motor to either the dewatering shaft or the washing shaft; a clutch lever that moves the slide plate up and down; and a geared motor that includes a rotation lever that drives the clutch lever. comprising, before SL has a mediate member having elasticity to mediate the operation of rotating the lever of the clutch lever and the geared motor, the rotating lever is freely rotatable only in one direction, the geared motor, the rotary lever and synchronization a cylindrical cam having at least two recesses while rotating, and at least two switches having a projection portion for the concave portion and the fitting, the two switches Each recess a protrusion fitted time off, configured as above is turned on when not fitted, the rotation of the drive motor by each of the two switches to stop the rotary lever at a position off When switching to either the dehydrating shaft or the washing shaft, when the clutch switching operation is reliably detected by two switches and at the same time when the power is turned on, it has stopped other than the previous contact, Switching time until returning to the initial state can be shortened.

In the second invention, in particular, in the first invention, during the washing or rinsing process, the rotation lever is rotated by turning on the power to the geared motor, and the first switch signal of the two switches is turned on. When it is detected that the second switch signal has been turned off, the energization of the geared motor is turned off, the rotary lever is stopped, the washing shaft is rotated, and the stirring blade is rotated. During the dehydration process, the energization of the geared motor is turned on to rotate the rotating lever, and the first switch signal is turned off after recognizing that the second switch signal is turned on. When detected, the geared motor is turned off.
The rotation lever is stopped and the washing and dewatering tub is rotated so that the dewatering shaft can be rotated, so that the switching operation of the clutch is reliably detected by two switches, and the rotation lever is stopped at a certain position. The rotation of the drive motor can be accurately switched to either the dehydrating shaft or the washing shaft.

In the third invention, in particular, the rotation of the drive motor is switched to either the dehydrating shaft or the washing shaft by stopping the rotation of the geared motor of the first or second invention at three locations, and at the time of rotating the washing shaft, This is equipped with three modes for switching the dewatering shaft between a fixed state and a free state, and the degree of freedom of the cleaning means can be increased.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In addition, this invention is not limited by this embodiment.

(Embodiment 1)
A washing machine according to a first embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a cross-sectional view of a washing machine according to the present embodiment, and FIG. 2 is a cross-sectional view of a mechanism portion including a clutch mechanism of the washing machine.

  1 and 2, the washing machine main body 21 is provided with a water receiving tub 23 suspended by a suspension 22 inside, and the suspension 22 absorbs vibration during dehydration. A washing tub / dehydration tub 24 is rotatably disposed in the water receiving tub 23. An agitating blade 25 for agitating the laundry is rotatably disposed at the inner bottom of the washing / dehydrating tub 24.

  The hollow dewatering shaft 26 is pivotally supported by a dewatering bearing 27 provided at the bottom center of the water receiving tank 23. The upper end side of the dewatering shaft 26 is fixed to the bottom of the washing / dehydrating tub 24 and the washing / dehydrating tub 24 is rotated. The washing shaft 29 fixes the stirring blade 25 to the upper end side and rotates the stirring blade 25. The washing shaft 29 is arranged so as to be coaxial with the hollow portion of the dewatering shaft 26, and is supported by a washing bearing 30 provided in the upper hollow portion 26 a of the dewatering shaft 26.

  The speed reduction mechanism 31 is included in the intermediate hollow portion 26b of the dewatering shaft 26, the washing shaft 29 is connected to the output side of the speed reduction mechanism 31, and the input shaft 32 is connected to the input side. The input shaft 32 is pivotally supported by an input bearing 33 provided in the lower hollow portion 26 c of the dewatering shaft 26. The dehydrating shaft 26 that includes the speed reduction mechanism 31 is included in the case 34, and the lower portion of the dewatering shaft 26 is supported by a bearing 28 that is provided below the speed reduction mechanism 31. The case 34 is fixed to the bottom side of the water receiving tank 23.

  The drive motor 35 rotates the dehydrating shaft 26 and the input shaft 32, and a rotor 35 a of the drive motor 35 is connected to the lower portion of the input shaft 32. A stator 35c is disposed in the drive motor 35 so as to face the magnet 35b provided on the outer periphery of the rotor 35a. The clutch mechanism that transmits and does not transmit the rotational power of the drive motor 35 to the dehydrating shaft 26 is configured as described below.

  A spline 36 is formed in the lower part of the dewatering shaft 26, and a slide plate 37 having a spline-like hole fitted to the spline 36 is attached to the dewatering shaft 26 so as to be slidable in the vertical direction. The slide plate 37 is pressed downward by a spring 38, and the rotation of the rotor 35a is transmitted to the dehydrating shaft 26 by engaging the lower teeth 37a provided at the lower end of the slide plate 37 and the opening 35d provided in the rotor 35a. The washing / dehydrating tub 24 can be rotated.

The clutch lever 40 has a substantially U-shaped slide plate support portion 40b that supports the slide plate 37 from below at one end, and has a shaft 40c that is rotatably fitted in a hole 43b provided in the stationary portion 43. By rotating the clutch lever 40 in the clockwise direction from the state of FIG. 2 around 40c, the slide plate support portion 40b moves the slide plate 37 upward against the downward biasing force of the spring 38.

  Then, as shown in FIG. 3, by removing the lower teeth 37a provided at the lower end of the slide plate 37 from the opening 35d provided in the rotor 35a, the rotation of the rotor 35a is not transmitted to the dehydrating shaft 26, and the input shaft 32 The stirring blade 25 rotates via the speed reduction mechanism 31 and the washing shaft 29. At the same time, the upper teeth 37b provided at the upper end of the slide plate 37 and the teeth 43a provided at the stationary part 43 are engaged with each other, thereby preventing the washing and dewatering tub 24 from rotating together due to the water flow caused by the rotation of the stirring blade 25.

  That is, when the clutch lever 40 is rotated in the counterclockwise direction, the dewatering shaft 26 is rotatable as shown in FIG. 2, and when the clutch lever 40 is rotated in the clockwise direction, the dewatering shaft 26 is rotated as shown in FIG. It becomes impossible. Further, the other end of the clutch lever 40 that forms the slide plate support portion 40b at one end protrudes to the outside of the drive motor 35. As shown in FIG. 2, the case where the clutch lever 40 rotates counterclockwise is shown. It contacts with 34 and is comprised so that it may not rotate any more.

  The geared motor 39 rotates the rotation lever 39b. Further, an intermediate member 41 having elasticity for connecting the clutch lever 40 and the rotation lever 39b is provided, and the movement of the rotation lever 39b is transmitted to the clutch lever 40.

  As shown in FIG. 5, a cylindrical cam 44 having two concave portions 44a and 44b at different positions perpendicular to the rotational direction is formed on the side of the rotary lever 39b, and a hole 39c of the geared motor main body 39a is formed. Is inserted. The geared motor main body 39 a includes a switch 45 and a switch 46, and the switch 45 and the switch 46 have the same level difference as the level difference in the position perpendicular to the rotation direction of the recesses 44 a and 44 b of the cam 44. From the side surface of the hole 39c, a protrusion 45a of the switch 45 and a protrusion 46a of the switch 46 protrude. The protrusions 45a and 46a of the switches 45 and 46 also have the same step as the recess of the cam 44. As the cam 44 rotates, the protrusion 45a of the switch 45 and the protrusion 46a of the switch 46 become the recess 44a of each cam 44. 44b is configured to be turned off when fitted, and turned on when not fitted.

  In the clutch state shown in FIG. 2, the recess 44a of the cam 44 and the protrusion 45a of the switch 45 are engaged with the protrusion 45a of the switch 45 and the recess 44a of the cam 44, so that the switch is in an OFF state. is there. FIG. 6 is a diagram showing a circuit for detecting an on / off switch signal of the switch 45 and the switch 46 when the geared motor 39 is energized, and the control means (not shown) receives the switch signal and is shown in FIG. Perform such control.

  As shown in FIGS. 1 to 5, the rotating operation line of the rotary lever 39 b is on a vertical plane, and is substantially on the same plane as the operating lines of the rotational movement of the clutch lever 40 and the vertical movement of the slide plate 37. It is configured as follows.

  The operation of the washing machine having the above configuration will be described.

  First, when the washing / rinsing process is performed by the rotation of the stirring blade 25, the control unit operates the geared motor 39 and the drive motor 35 based on the flowchart shown in FIG.

First, in step 51, energization of the geared motor 39 is turned on, and the rotating lever 39b is rotated clockwise from the state shown in FIG. As a result, the clutch lever 40 rotates clockwise through the elastic mediating member 41, and the slide plate 37 supported from below by the slide plate support portion 40b moves upward against the downward biasing force of the spring 38. Go to.

  Then, the engagement between the lower teeth 37a provided at the lower end of the slide plate 37 and the opening 35d provided in the rotor 35a is released.

  Next, after recognizing that the switch 1 signal has changed from OFF to ON in step 52, when detecting the next switch 2 OFF in step 53, the energization to the geared motor 39 is turned off in step 54. Then, the rotation lever 39b is stopped in the state shown in FIG. Next, energization of the drive motor 35 is turned on in step 55, the rotor 35a is rotated, and the stirring blade 25 is rotated via the input shaft 32, the speed reduction mechanism 31, and the washing shaft 29, thereby washing and rinsing steps. I do.

  Here, if the upper teeth 37b first provided on the upper end of the slide plate 37 and the teeth 43a provided on the stationary part 43 are in a meshing positional relationship, they are meshed as shown in FIG. 3 and the dehydrating shaft 26 is fixed. However, if it is not in the positional relationship of meshing, the teeth are in a state where they are riding on. For this reason, although the clutch lever 40 is in an insufficiently rotated state, the gear member motor 39 and the clutch lever 40 are not overloaded and broken by the extension of the intermediate member 41.

  Further, the dewatering shaft 26 is rotated by the co-rotation of the washing and dewatering tub 24 caused by the water flow during the rotation of the stirring blade 25, and the upper teeth 37b provided at the upper end of the slide plate 37 rotating integrally therewith and the stationary part 43 When the provided teeth 43a come into the meshing positional relationship, the slide plate 37 is moved upward to the meshing position via the clutch lever 40 by the elastic force of the mediating member 41, and the state shown in FIG. 26 is fixed, and then the washing and rinsing of the laundry in the washing and dewatering tub 24 is advanced without causing the washing and dewatering tub 24 to rotate together.

  When the washing / rinsing process is completed, the dehydration process is started. In the dehydration process, the water in the washing / dehydration tub 24 is drained, and at the same time, the geared motor 39 and the drive motor 35 are operated based on the flowchart shown in FIG.

  First, in step 56, energization of the geared motor 39 is turned on, and the rotation lever 39b is rotated clockwise. When the rotation lever 39b exceeds the position shown in FIG. 4, the clutch lever 40 starts to rotate counterclockwise via the mediating member 41, and the slide plate 37 supported from below by the slide plate support portion 40b has its own weight and spring 38. The lower teeth 37a provided at the lower end of the slide plate 37 and the openings 35d provided in the rotor 35a mesh with each other. The clutch lever 40 further rotates counterclockwise, and the slide plate support portion 40b moves away from the slide plate 37.

Control means switch 2 signal after confirming that it is now on-at step 57, upon detecting the next switch signal 1 OFF at step 58, the energization of the step 59 to the geared motor 39 off to stop the rotation lever 39b in the state of FIG.

  Further, at this position, the mediating member 41 is in a state in which it has not been stretched, so that the rotating lever 39b does not receive an elastic force. For this reason, even if the user unplugs the power cord or a power failure occurs, the rotating lever 39b does not rotate due to the elastic force of the mediating member 41, and the washing and dewatering tub 24 is rotating in inertia. The slide plate does not move upward.

  Next, in step 60, energization of the drive motor 35 is turned on, the rotor 35a is rotated, and the washing and dewatering tub 24 fixed to the dewatering shaft 26 is rotated via the slide plate 37 engaged with the rotor 35a. Even if the initial state is a state where the lower teeth 37a provided at the lower end of the slide plate 37 and the opening 35d provided in the rotor 35a are not engaged with each other, the rotor 35a is slightly rotated when the drive motor 35 is started. Since the positional relationship is reached, the slide plate 37 moves downward to the meshing position by its own weight and the downward biasing force of the spring 38, so that the meshing is positively engaged and the washing and dewatering tub 24 is rotated.

  The moisture of the laundry that has been washed and rinsed due to the centrifugal force generated by the rotation of the washing / dehydrating tub 24 passes through the holes 20 (see FIG. 1) provided in the side surface of the washing / dehydrating tub 24 and enters the water receiving tub 23. Squeezed out. Thus, the laundry is automatically dehydrated.

  In this embodiment, the washing / dehydrating tub 24 is not rotated and the process of washing and rinsing is not provided, but in that case, it can be realized by performing the same clutch operation as in the dewatering of the present embodiment.

  Further, the state in which the medium member 41 is extended is the state in which the stirring blade 25 rotates, and the state in which the medium member 41 is not extended is the state in which the washing and dewatering tub 24 is rotated. Moreover, although the washing machine which has a speed-reduction mechanism was described in the said embodiment, it may be a washing machine which does not have a speed-reduction mechanism and transmits rotation of a drive motor directly to a washing shaft.

  As described above, the geared motor 39 has two cylindrical cams 44 having two recesses 44a and 44b that rotate synchronously with the rotary lever 39b, and the two that are turned off by fitting with the recesses 44a and 44b of the cam 44. Switches 45 and 46, and the rotation lever 39b stops at two points of the OFF position, so that the rotation of the drive motor 35 is switched to either the dehydrating shaft 26 or the washing shaft 29, so that a reliable position is achieved. Thus, the stop position of the rotation lever 39b can be controlled.

(Embodiment 2)
FIG. 8A is a front view of a geared motor of a washing machine according to the second embodiment of the present invention, FIG. 8B is a partial sectional view of the geared motor, and FIG. 8C is a side view of a rotating lever of the geared motor. FIG. 9 is a cross-sectional view of the clutch mechanism of the washing machine (the washing and dewatering tub is in a free state).

  In the present embodiment, as shown in FIG. 8, the geared motor 47 is provided with three switches 48, 49, 50, and the positions where the switches are turned off are the three recesses 44a, 44b, 44c. The configuration is the same as that of the first embodiment, and a detailed description thereof is omitted.

  The position of the rotating lever 39b at this time is the position shown in FIGS. 2, 3 and 9, and in the clutch state shown in FIG. 9, the lower teeth 37a provided at the lower end of the slide plate 37 and the rotor 35a are provided. The meshing of the opening 35 d is also in a state where the meshing of the upper teeth 37 b provided at the upper end of the slide plate 37 and the teeth 43 a provided at the stationary part 43 is also disengaged. When the stirring blade 25 is rotated in this state, since the dewatering shaft 26 is not fixed, the washing and dewatering tub 24 rotates together with the water flow, and a water flow different from that when the washing and dewatering tub 24 is fixed is generated.

  When the rotating lever 39b is rotated clockwise, the control means (not shown) receives the switch signal and performs the same control as described above.

  The operation in the above configuration will be described. When the washing / dehydrating tub 24 is fixed and the stirring blade 25 is rotated to perform the washing / rinsing process, the geared motor 47 and the drive motor 35 are operated.

  First, the energization to the geared motor 47 is turned on, the rotation lever 39b is rotated clockwise, the signal of the switch 48 is turned off, the energization to the geared motor 47 is turned off, and the position shown in FIG. Thus, the rotation lever 39b is stopped and the rotor 35a of the drive motor 35 is rotated.

  When the washing and dewatering tub 24 is in a free state and the stirring blade 25 is rotated to perform the washing / rinsing process, the geared motor 47 and the drive motor 35 are operated. When the washing / dehydrating tub 24 is rotated and the washing / rinsing process or the dehydrating process is performed, the geared motor 47 and the drive motor 35 are operated. That is, similar control is performed in which power is supplied until the switch signal is turned off. Other operations are the same as those in the first embodiment, and are omitted.

  As described above, according to the present embodiment, one of the clutch states at each stop position is a state in which the washing and dewatering tub 24 is rotated, and the other two are the washing and dewatering tub 24. The stirring blades 25 are rotated depending on whether they are fixed or not. By adding a new mode of rotating the stirring blade 25 while the washing / dehydrating tub 24 is free and causing the washing / dehydrating tub 24 to rotate together, a new water flow can be generated and the degree of freedom of the cleaning means can be increased. Can be raised.

  As described above, since the washing machine according to the present invention can perform a reliable switching operation in the clutch switching system, it is highly reliable and can be widely applied to household and commercial washing machines.

Sectional drawing of the washing machine in Embodiment 1 of this invention Sectional drawing which shows the state at the time of rotation of the washing and dewatering tank of the clutch mechanism part of the washing machine Sectional drawing which shows the state at the time of fixation of the washing and dewatering tank of the clutch mechanism part Sectional drawing which shows the state in the middle of clutch switching of the clutch mechanism part (A) Exploded front view of the guard motor of the washing machine (b) Partial sectional view of the guard motor of the washing machine (c) Front / plan view of the rotation lever of the guard motor Circuit diagram for detecting on / off of the switch of the same Gard motor (A) Main part flowchart when switching to a state where the washing and dewatering tub of the washing machine is rotated (b) Main part flowchart when switching to a state where the stirring blade of the washing machine is rotated (A) Front view of geared motor of washing machine according to embodiment 2 of the present invention (b) Partial sectional view of the geared motor (c) Side view and bottom view of rotating lever of the geared motor Sectional drawing in which the washing and dewatering tank of the clutch mechanism of the washing machine is in a free state Cross section of a conventional washing machine

24 Washing and Dewatering Tank 25 Stirring Blade 26 Dewatering Shaft 29 Washing Shaft 35 Drive Motor 37 Slide Plate 39, 47 Geared Motor 39b Rotating Lever 40 Clutch Lever

Claims (3)

A hollow dewatering shaft for rotating the washing and dewatering tub, a washing shaft disposed on the same axis as the dewatering shaft for rotating the stirring blade disposed in the washing and dewatering tub, and a drive motor that moves up and down the dewatering shaft rotation, and the slide plate to switch to any of the washing shaft includes a clutch lever for vertically moving the slide plate, and a geared motor having a rotary lever which drives the clutch lever, before Symbol clutch lever having mediated member having elasticity to mediate the operation of rotating the lever of the geared motor and the rotating lever is only rotated free in one direction, the geared motor has at least two as well as rotating the rotating lever and synchronization each a cylindrical cam having a recess, and at least two switches having a projection portion for the concave portion and the fitting, the two switches, concave And OFF when the projection portion is fitted when not engaged is configured to be turned on, said rotation of the drive motor dehydrated by each of the two switches to stop the rotary lever at a position off A washing machine that switches to either the shaft or the washing shaft. During the washing or rinsing process, the rotary lever is rotated by turning on the power to the geared motor and the second switch signal is recognized after recognizing that the first switch signal of the two switches is turned on. Is turned off, the energization of the geared motor is turned off, the rotary lever is stopped, the washing shaft is made rotatable, the agitation blade is rotated, and the energization of the geared motor is turned on during the dehydration process. By rotating the rotary lever and recognizing that the second switch signal is turned on and detecting that the first switch signal is turned off, the energization to the geared motor is turned off and the rotation is performed. The washing machine according to claim 1, wherein the washing and dewatering tub is rotated with the lever stopped and the dewatering shaft rotatable . By stopping the rotation of the geared motor at three locations, the drive motor can be switched between the dewatering shaft and the washing shaft, and when the washing shaft is rotated, the dewatering shaft is switched between a fixed state and a free state. The washing machine according to claim 1 or 2 provided.

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