JPH012693A - washing machine - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] (b) Industrial application field The present invention relates to washing machines.

(Background) Various washing machines have been proposed in the past that transmit the rotational force of a drive motor to rotary blades and a washing and dehydrating tank via a clutch mechanism. 61-1034
This is proposed in issue 96. The following will explain based on FIGS. 9 and 10.

Figure 9 shows a general washing machine, (1) is the machine frame, (2)
(3) is the operation section provided at the upper rear of the machine frame (1).
(4) is an outer tank installed inside the machine frame <1>, (4) is an inner tank installed inside the outer tank (3) and has dehydration holes (5) around the periphery, and serves as a washing and dehydration tank; (6) ) is a rotor disposed at the bottom of the inner tank (4), (7) is a drive motor, which is connected to the inner tank (4) and the rotor (6) via a power transmission mechanism (8), When washing, allow the rotary blade (6) to rotate, and when dehydrating, allow the inner tank (4) to rotate. (6) Rotate both in one direction at high speed.

(9) is the drain port installed at the bottom of the outer tank (3), (10) is the drain solenoid valve, (11) is the drain hose, (12) is the outer tank (
3) is an air trap installed at the bottom corner of
communicated through. (15) is a magnetic valve that supplies 19 digits of water into the water supply channel (16).

FIG. 10 is a detailed explanatory diagram of the drive section, and shows the outer tank (3).
A box-shaped mounting base (17) is screwed onto the bottom of the mounting base (17), and a hemispherical surface of a hanging rod (not shown) is attached to both ends of the mounting base (17) that protrude from the outer tank 3). The catch seats (18) (18) are integrally formed. Also, at the bottom of the side wall of the outer tank (3),
A similar catch is integrally molded in the direction perpendicular to the line connecting the marks (18) and (18), and a hemispherical body and a compression spring (both not shown) are interposed on the lower end surfaces of these seats and the hanging rod. The outer tank (3) is elastically suspended within the machine frame using a hanging rod. At both ends of the mounting base (17) in the non-longitudinal direction,
The flange parts (19) (19) are bent and formed, and the mounting base (
In the center of the inner tank (4), there is a drive shaft (20) for the inner tank (4).
The case 22) of the upper bearing (21) that pivotally supports the is integrally molded. The case (24) of the lower bearing (23) of the drive shaft (20) has the flange portion (
19) It is screwed onto (19). The flange portion (1
9) (19) further includes a motor (7) and a drain valve (10).
A solenoid (25) that opens and closes the drain valve (10) via a connecting rod (26) is screwed onto the drain valve (10).

The blade axis (27) of the rotation*(6) is the drive shaft (20)
A pulley (28) is fixed to the lower end of the inner part, and a pulley (28) is fixed to the motor shaft.
9) are connected via bell 1-(30).

(31) is a clutch that controls the transmission of power to the drive shaft (20)-\.

(32) is a brake drum, and the drive shaft (20)
Fix it with screws (33). A brake band (35) having brake shoes (34) on its inner surface is elastically fitted onto the brake drum (32).

<36> is a cylindrical clutch boss, (37) is an inverted U cross section
It is a letter-shaped brake ring with slits (38
), and the clutch boss (3) is formed at the center of the upper surface.
6) is provided, and the clutch boss (37) is welded to the periphery of the hole.

The clutch boss (36) is attached to the drive shaft (20).
) (brake ring (37)) and brake drum (3
2) from below and fit one end bent piece (39) of the brake band (35) into the slit 38 of the brake ring (37), then insert the brake drum (32).
' is fixed with screws.

Next, (40> is a flange spring wound (left-handed) around the clutch boss (36), and its lower end (40>
1) is fixed to the mounting base (17) with a pin (42), and the upper end (43) has an upward groove (45) formed at one end of the operating lever (44) fixed to the connecting rod (26). )
inserted inside.

(46) is a clutch spring for preventing reverse rotation of the inner tank (4), which is wound around the brake drum (32) in the opposite direction (clockwise) to the clutch spring (40), and is wound at the lower end (47). ) is fixed to the case (24) of the lower bearing (23).

Further, (48) is a six-piece Clara that engages and disengages from the pawl wheel (49) of the clutch (31) in conjunction with the connecting rod (26), and when engaged, the pawl wheel (49) , and at the same time displacing one end of the clutch spring (50) that is engaged with the pawl wheel (49) in the expansion direction,
Transmission of power to the drive shaft (20) is then completely cancelled.

Thus, during dehydration, the solenoid (25) is energized,
The connecting rod 26) is pulled toward the back in FIG. 9, and the drain valve (10) opens. At the same time, the clutch piece (48)
is disengaged from the clutch (31), power is transmitted to the drive shaft (20), and the operating lever (44) allows the upper end (43) of the clutch spring (40) to be displaced in the direction of the expansion force; The drive shaft (20H inner tank (4)) rotates to the left.

Next, when the dewatering is completed, the excitation of the solenoid (25) is cut off and the drain valve (10) is closed. At the same time, the seven pieces (48) engage with the clutch (31), and the drive shaft (
20)-- is cut off, and the operating lever (44) is moved to the clutch spring 40)--.
The end (43) is displaced in the direction of the tightening force (towards the front in Figure 10).

As the clutch post (36) rotates, the clutch spring (40) tightens even more, locking the rotation of the clutch boss (36).Therefore, the brake ring (37) also becomes fixed, and Since this brake ring (37) and the brake band <35) are in a locked state, they are also in a fixed state. In this way, a frictional force is generated between the brake knee (34) and the rotating brake drum (32), and the brake is applied to the drive shaft (20), thereby stopping the inner tank (4).

Now, during washing, only the Waniki drive shaft (20) rotates, so the rotor blades (6>) turn left and right.At this time, the reaction of the rotation of the rotor blades (6) causes the inner tank (4) to rotate. The clutch spring (
40) is in the tightening direction, the above-mentioned braking force acts and the rotation of the inner tank (4) is prevented. Furthermore, when rotating clockwise, the clutch spring (40) does not act because the direction is in which the clutch spring (40) expands, but the clutch spring (46) wound around the brake drum (32) tightens. , the brake drum (
32) is locked to prevent rotation of the inner tank (4).

In such a washing machine, the braking noise during braking is very low, but there are frequent accidents in which the clutch spring (46) for assisting reverse rotation breaks or its fixed end is damaged. occurs.Therefore, this clutch spring (
In place of 46), a roller clutch capable of rotation in only one direction is used, as disclosed in Japanese Utility Model Publication No. 60-31672.

As shown in Fig. 11, the one-way rotation roller clutch (51) means that when the drive shaft (20) rotates in the dewatering direction (Fig. 11 (a)), each roller of the roller clutch (51) (52)... is released from its restraint from the ratchet groove (53)... and can now rotate freely, and due to the influence of washing water flow, etc., the inner tub (4) (drive shaft <2
When the roller (52) of the roller clutch (51) is about to rotate in the opposite direction to the dewatering direction, each roller (52) of the roller clutch (51) is rotated in the latch groove (53).・The drive shaft (20) is prevented from rotating.

(c) Problems to be Solved by the Invention In the case where the roller clutch (51) is installed on the drive shaft (20) as described above, the roller clutch (51) and the upper and lower bearings (21) and (23) are If alignment is difficult and the alignment is not complete, the drive shaft (20
) not only do not rotate smoothly, but also cause various problems such as wear on one side of the roller clutch and a reduction in the ability to prevent reverse rotation.

In addition, in Utility Model Publication No. 60-31672, oil-less metal is press-fitted for centering the roller clutch (51), but the height of the finished roller clutch is increased by the length of this oil-less metal. , as a result, the dimensions of other components are limited. Moreover, since the housing of the roller clutch is tightened and fixed with screws, the roller clutch moves during this tightening, and there is also the problem that the shaft center tends to be misaligned.

In view of these problems, the present invention has been developed to prevent reverse rotation of the dehydration tank during washing in a washing machine with a simple structure, and to improve assembly workability. The task is to achieve this goal.

(d) Means for Solving the Problems The washing machine of the present invention has a one-way rotation roller clutch disposed around the outer periphery of the drive shaft of the dehydration tank to restrict rotation of the dehydration tank in the reverse rotation direction. The housing of the roller clutch is surrounded by a holding member made of resin, and the uneven portion formed on the housing and the uneven portion formed on the holding member are engaged with each other, and further, at least A radial gap is provided, and the holding member is fixed to a fixed part.

Further, the holding member surrounds the housing from above except for its lower end surface, and the lower end of the housing is supported by the upper end of a bearing that supports the drive shaft.

Further, a fitted part is provided in the case holding the bearing that supports the drive shaft, and the load holding member Ffj is fitted and attached to the fitted part.

The present invention also includes a bearing that supports the drive shaft of the dehydration tank, a case that holds the bearing, and a one-way rotation roller clutch that is disposed around the outer periphery of the drive shaft and that restricts rotation of the dehydration tank in the opposite direction. , a housing in which the roller clutch is housed, the housing is provided with a fitting part coaxial with the roller clutch, the case is provided with a fitted part coaxial with the bearing, and the housing is provided with a fitting part coaxial with the bearing; The housing is attached to the case by fitting into the fitting portion.

It also includes a bearing that supports the drive shaft of the dehydration tank, a case for holding the bearing, and a unidirectional rotation roller that is arranged around the outer periphery of the drive shaft and that restricts the rotation of the dehydration tank in the reverse rotation direction. and a crunch, the roller club 7
The drive shaft is inserted into the housing, and the drive shaft is inserted into the insertion hole formed in the case, and the drive shaft is inserted continuously into the insertion hole. Concentric fitting parts are formed, and the housing is fitted into the fitting parts.

(E) Effect: By providing a radial gap between the housing and the holding member and giving some leeway to the movement of the housing, the roller latch itself automatically aligns itself with respect to the drive shaft. Furthermore, the vibration noise of the housing due to the formation of the gap is absorbed by the resin holding member.

Furthermore, since the lower end of the housing is supported by the upper end of the bearing, the supporting member can be omitted and the height of the holding member can be reduced accordingly.

Further, since the holding member is fitted into the fitted portion of the case, the position of the holding member does not shift during removal, rotation of the dewatering tank, etc.

In addition, the housing has a fitting part coaxial with the roller clutch, and the case that holds the bearing has a fitting part coaxial with the bearing, so the fitting part of the housing can be connected to the fitting part of the case. The roller clutch, drive shaft and bearing can be aligned by simply fitting them together.

Furthermore, by incorporating the roller clutch and bearing into the housing, the roller clutch, drive shaft, and bearing can be automatically aligned by making them into a unit, and by fitting the housing to the mating part of the case. Ru.

(・\) Embodiment An embodiment corresponding to claims 1.2 and 3 of the present invention will be described based on FIGS. 1 and 2. However, the same reference numerals are used for the same parts as in the conventional example, and the explanation is omitted.

(54) is a lower bearing case made of sheet metal for supporting the lower bearing (23), and the cylindrical holding part (55) into which the lower bearing (23) is press-fitted has been drawn. . Then, the holding part (55) is
The thickness is deeper than the thickness of the lower bearing (23).

(56) is a steel housing that houses the roller clutch (51), and is used to hold the roller clutch (51) on the outer periphery of the drive shaft (20).

(57) is a resin holding member surrounding the upper and side surfaces of the housing (56), and the upper surface is provided with the drive shaft (57).
20) is provided with an insertion hole (58). (59) is a flange that integrally extends from the periphery of the holding member (57), and the flange (59) has a hole (60) for screwing inserted therein. Holes (3 places)
is perforated, and a protrusion (61) is provided hanging from the lower surface. - On the other hand, the lower bearing case (54) has a screw hole (not shown) corresponding to one of the insertion holes and an engagement hole (62>) into which the projection (61) engages.

The side surface of the housing (56) and the holding member (57)
On the surrounding surface of <63>, uneven parts (63) and (64) for spline (or serration) connection to each other are formed around the entire circumference (may be partial), and furthermore, the uneven parts <63> (64) radial gap cl (o, smm
The size was adjusted so that a diameter of about 1 m) could be formed.

Further, the upper surface of the housing (56) and the holding member (57)
) There is also an axial gap C2 (0.2 sho ~ Q, 30 m1
degree) is formed.

Furthermore, the flange (59) on the holding member (57)
) has a diameter corresponding to that of the fitting part (65) in order to be press-fitted into the upper part of the lower bearing (23) of the holding part (55) of the lower bearing case (54). It is set to have the same diameter as the holding part (55).

Therefore, the above-mentioned I]-latch (51) and holding member (
The drive shaft (20) into which the drive shaft (20) is inserted is supported by the upper and lower bearings (21) and (23), and the housing (56) is attached to the lower side.A washer ( 66), then the holding member (57
) from above the housing (56) to the uneven portion <63>.
(64) are engaged with each other and surrounded, and the fitting portion (64) is
5) into the holding part (55), the protrusion (61) is engaged with the engagement hole (62), and finally the holding member (57) is secured with the bolt (60)... Tighten and fix to the lower bearing case 54).

In the washing machine assembled and configured as above, when the drive shaft (20) rotates, the housing (56) of the roller clutch (51) moves within the range of the gaps C+ and C2, and the drive shaft (20) moves within the range of the gaps C+ and C2. Roller clutch (5) against shaft (20)
1) Alignment is performed automatically. And this interval C1,
The above-mentioned housing]/g (57) that occurs due to the provision of C2
The vibration noise is absorbed by the holding member (57) made of a resin material. In addition, due to the presence of the intervals CI and C2, even if rust occurs on the surface of the housing (56), there is no fear that the mounting state of the housing (56) will shift due to this rust.

Then, by press-fitting the fitting part (65) of the holding member (57) into the holding part (55) and engaging the protrusion (61) into the engaging hole (62), this Holding member (
57) also the drive shaft (20) and lower bearing (23)
The holding member (57) can be fixed in an appropriate position against the
The holding member (57) does not move when the bolt (60) is tightened by one inch.

Furthermore, since the lower end of the housing (56) is supported by the upper end of the lower bearing (23), parts can be omitted and the cost can be reduced accordingly. At this time, it is desirable to support the housing (56) by placing it on the upper end of the outer race (23a) of the lower bearing (23), and it may be placed as it is without using the washer (66). Alternatively, a rib may be formed on the upper surface of the outer race (23a), and Iff may be formed on the rib.

Moreover, as shown in FIG. 3, even if the housing (56) and the outer race portion of the roller clutch (51) are integrated to reduce the number of assembly steps, this does not depart from the gist of the present invention. .

Next, an embodiment corresponding to claim 4.5 of the present invention will be described based on FIGS. 4 to 8. However, the same reference numerals are used for the same parts as in the conventional example and the above-described embodiment, and the description thereof will be omitted.

In FIG. 4, (67) is the roller clutch (51).
), and is used to hold the roller clutch (51) on the outer periphery of the drive shaft (20). A flange (68) is formed in the horizontal direction on the outer periphery of the housing (67), and the housing (67) is attached to the lower bearing case (54) by bolts (69) at the flange (68). ...Fix with screws.

Furthermore, a fitting part (7o) is formed in the lower part of the housing (56), which is the same as the roller clutch (51) and has the same diameter as the holding part (55) of the lower bearing case (54). be.

(71) is an oil seal press-fitted between the inner surface of the upper end of the housing (<56) and the drive shaft (20). (51) is a different type of grease (the clutch spring (40)
゛) used in ゛ is the roller clutch (51)
is prevented from invading.

The drive shaft 20) on which the roller clamp (51) is disposed is supported by the lower bearing (23) press-fitted into the holding portion (55). And the housing (
Press fit the fitting part <70> of 67) into the holding part (55) (
7 langes <68) to the lower bearing case (54).

That is, by fitting the fitting part (70) of the housing (67) into the holding part (55), the drive shaft (2
0), lower bearing <23) and roller clamp (5)
1) Mutual alignment can be done automatically.

In addition, since the fitting part (70) is fitted to the holding part (55), when tightening the bolts (69), the housing (69)...
7) will not move and cause misalignment.

5 to 8 show respective other embodiments 1βj of the present invention, and FIGS. 5 and 6 show the lower bearing case (54
) is drawn to form a circular holding part on the upper part of each lower bearing (23), which has a larger diameter than the support part (55a) of the lower bearing (23) and is the same as the lower bearing (23). 72> (73), and the fitting portion (70) (73) of the housing (67>) of the roller clutch (51) is formed on this.
4) is press-fitted. In particular, Figure 4 shows the flange (
In order to use the flange (68) as the fitting part, the flange (68)
is formed into a circular shape having the same diameter as the holding part (72).

FIG. 7 shows that the holding parts (72) and (73) in the embodiments of FIGS. 5 and 6 are deeply drawn, and the flange (68) is
It is also possible to press fit the housing (67) itself without providing it.

As mentioned above, in the embodiments shown in FIGS. 5 to 7, the following (
In the 111 bearing case (54), the press-fitting part (supporting part (55a)) and the fitting part (
70>(74) press-fitting part (holding part(55>(72)(7)
3)), the holding force of the lower bearing (23) will not be weakened due to the expansion of the support part (55a) due to the press-fitting of the fitting parts (70) and (74).

Next, in the embodiment shown in FIG. 8, a large-diameter press-fitting part (67a) is formed in the lower part of the housing (67), and by press-fitting the lower bearing 23) into the press-fitting part, the roller The clutch (51) and bearing (23) can be integrated into a unit.

On the other hand, the lower bearing case (54) has a cylindrical holding part (corresponding to the fitted part) (55) which is drawn to be the same as the drive shaft (20).

Then, a drive shaft (2
0), and the drive shaft (20) is inserted into the holding part (
After inserting the housing (54) into the holding part (55) from the upper end of the housing (55), the housing (54) is press-fitted into the surface holding part (55).

Thus, the housing (67) is attached to the holding part (55).
), the drive shaft (20), lower bearing (23), and roller clutch (51) are automatically aligned. Moreover, roller clutch 1
51) and the lower bearing (23) can be easily installed, the bolt tightening work of the housing (54) can be omitted, and the diameter of the holding part (55) is also smaller than the diameter of the bearing. Since it is large, it is easy to draw.

In addition, in the above embodiment, the holding parts (55) (72) (73
> is provided in the lower bearing case (54), but it may be provided in the upper bearing case and the housing may be fixed to this upper bearing case. Also,
As in FIG. 3, the outer race of the roller clutch may be integrally molded into the housing, and the remaining parts may be assembled therein.

(g) Effects of the invention According to the washing machine of the present invention, the following effects are achieved.

That is, in the washing machine of claim 1, by providing a gap between the housing and the holding member and giving a certain amount of leeway to the movement of the housing, the roller clutch itself automatically aligns itself. performance can be maintained for a long period of time, and the reverse rotation of the dehydration tank during washing can be prevented reliably with a simple structure.

Moreover, there is no need to perform difficult alignment work, reducing labor costs.
It is very cheap in terms of cost.

Furthermore, by providing a gap, the vibration of the housing can be reduced.
Since it can be absorbed by the holding member, damage to the housing and generation of vibration noise can be prevented.

Further, in the washing machine according to claim 2, since the lower end of the housing is supported by the upper end of the bearing,
The supporting member can be omitted and the height of the holding member can be reduced, making assembly easier and reducing costs.

Further, in the washing machine according to claim 3, since the holding member is fitted into the fitted portion of the case, the position of the holding member does not shift during installation or rotation of the dehydration tank. The holding member can always be held in an appropriate position.

Further, in the washing machine according to claim 4, alignment between the roller crafter, the drive shaft, and the bearings can be automatically performed by simply fitting the fitting portion of the housing into the fitting portion of the case. The performance of the roller clutch can be maintained for a long period of time, and the reverse rotation of the dehydration tank during washing can be prevented reliably with a simple structure.

Moreover, since it can be easily assembled without performing difficult alignment work, it is very inexpensive in terms of labor and costs.

Furthermore, in the FK washing machine of claim 5, alignment between the roller clutch, the drive shaft, and the bearings can be automatically performed by simply fitting the housing into the fitted portion of the case. Performance can be maintained over a long period of time, and reverse rotation of the dehydration tank during washing can be prevented reliably with a simple structure.

Furthermore, by forming the roller clutch and bearing into a unit, assembly is easy and the cost is very low.

[Brief explanation of the drawing]

Fig. 1 is a sectional view of the main parts of the washing machine of the present invention, and Fig. 2 is the same A-
A' sectional view, FIG. 3 is a sectional view showing other embodiments of the roller clutch section, FIGS. 4 to 8 are sectional views of main parts of washing machines in other embodiments, and FIG. An internal mechanism diagram of a conventional washing machine, FIG. 10 is a sectional view of a main part of the same driving section, and FIGS. (4) Inner tank (washing and dehydration tank), (7) Drive motor, (20) Drive shaft, (23) Lower bearing, (31) Clutch (clutch mechanism),
(51)...Roller clamp, 54)...Lower dovetail case (fixed part), (55) (72) (73
)...Holding part (fitted part), (56) (67)...
Housing, (57)... Holding member, (63) (64
)...Uneven part, (70)ri74>... Fitting part.

Claims (5)

[Claims] (1) In a device that transmits the rotational force of a drive motor to a washing and dehydration tank via a clutch mechanism, a mechanism is provided on the outer periphery of the drive shaft of the dehydration tank to restrict rotation of the dehydration tank in the reverse direction. A roller clutch for directional rotation is provided, the housing of the roller clutch is surrounded by a resin holding member, and
The concavo-convex portion formed on the housing and the concave-convex portion formed on the holding member are engaged with each other, and further, a gap is provided at least in a radial direction between the housing and the holding member, and the holding member is fixed to the fixing portion. A washing machine featuring (2) The holding member surrounds the housing from above except for its lower end surface, and the lower end of the housing is supported by the upper end of a bearing that supports the drive shaft. The washing machine according to item 1. (3) A case that holds a bearing that supports the drive shaft is provided with a fitted portion, and the holding member is fitted and attached to the fitted portion. washing machine. (4) In a device that transmits the rotational force of a drive motor to a washing/dehydration tank via a clutch mechanism, a bearing that supports the drive shaft of the dehydration tank, a case that holds the bearing, and a case that supports the drive shaft of the drive shaft are provided. A one-way rotation roller clutch disposed on the outer periphery and regulating rotation of the dehydration tank in a reverse rotation direction, and a housing housing the roller clutch therein, the roller clutch being fitted concentrically with the roller clutch into the housing. by providing a part, providing a fitted part concentric with the bearing in the case, and fitting the fitting part to the fitted part,
A washing machine characterized in that the housing is attached to the case. (5) A bearing that supports the drive shaft of the dehydration tank in a device in which a washing/dehydration tank is installed inside the outer tank and the rotational force of a drive motor is transmitted to the dehydration tank via a clutch mechanism; A case for holding the bearing, and a one-way rotation roller clutch disposed around the outer periphery of the drive shaft to restrict rotation of the dehydration tank in the reverse rotation direction, the roller clutch and the bearing are mounted in a housing. Built into the
inserting the drive shaft into the housing, inserting the drive shaft into an insertion hole formed in the case, and forming a fitted portion concentric with the drive shaft that is continuous with the insertion hole;
A washing machine characterized in that the housing is fitted into the fitted portion.