JPH0358759B2 - - Google Patents

Description

[Detailed description of the invention] (b) Industrial application fields The present invention relates to a dehydrating washing machine.

(b) Conventional technology The dehydrating washing machine as a conventional example was developed in the 1980s.
It is shown in Publication No. 31672 (D60F 37/40),
This will be explained based on FIGS. 7 and 8.

101 is a machine frame, 102 is an outer tank, and 103 is a dewatering/washing machine. 104 is a mounting plate that is elastically suspended from the machine frame 101 by a vibration isolator and a hanging rod;
It supports the outer tank 102. On the lower side of the mounting plate 104, there is a washing tub 103 and a drive unit 10 for the rotary blade 105.
6 and a motor 107 are attached. motor 107
is connected to the pulley 1 of the drive section 106 via the belt 108.
It is connected to 09. 110 is a clutch device that switches the rotation of the rotary blade 105 and the rotation of the washing tub 103.

FIG. 8 shows the structure of the drive unit 106, where 111 is an upper cover of the drive unit 106, and 112 is a lower cover thereof. Pulley 109 is fixed to pulley boss 113 with bolts 114. Reference numeral 115 denotes a dehydration tank shaft, which is supported by the upper cover 111 by an upper bearing 116, and its lower end is fixed to an upper gear case 117 that acts as a brake drum. is fixed with screws 119. A dehydration drive shaft 120 is integrally provided in the lower gear case 118, and the dehydration drive shaft 120
is lower cover 1 by lower bearing 121.
12, and is coupled to a pulley boss 113 via a clutch spring, which will be described later. The dehydration tank shaft 115 and the dehydration drive shaft 120 are hollow cylindrical shafts, and have therein a rotor shaft 123 and a washing drive shaft 124 coaxially supported by bearings 112. 124 is pulley boss 1
It is combined with 13.

A roller clutch 125 is disposed around the dewatering drive shaft 120 to allow rotation in only one direction.
Rotation of the dehydration tank 103 in the anti-dehydration rotation direction is prevented. The roller clutch 125 is connected to the housing 1
26 , and the housing 126 is screwed onto the lower cover 112 .

The clutch device 110 includes a clutch spring 1
27, a pawl wheel 128 disposed around the clutch spring 127, and a pawl wheel 128 that engages with the pawl wheel 128.
It consists of a detachable clutch piece 129. That is, when the clutch piece 129 is engaged, the pawl wheel 128
is displaced, and at the same time, one end of the clutch spring 127 that is engaged with the pawl wheel 128 is displaced in the expanding direction, and the transmission of power to the dewatering drive shaft 120 is released.

Therefore, the rotation of the motor 107 is caused by the rotation of the belt 108.
is transmitted to the pulley 109 via the clutch device 110, and the washing tub 103 is approximately
It rotates at 900rpm, and the rotor blade 105 rotates at approximately 900rpm during washing.
It rotates at 290r.pm.

(c) Problems to be Solved by the Invention In the conventional example, when the rotation of the motor 107 is transmitted to the dehydration drive shaft 120 and the dehydration tank shaft 115, the gear case 117 as a brake drum also rotates at the same time. Rotate. In these cases,
There has been a problem in that various lubricating oils used in the gear cases 117, 118 and the upper bearing 116 leak, are scattered due to centrifugal force, and adhere to the brake drum surface, reducing braking performance.

In view of this problem, the present invention is intended to prevent the deterioration of the braking ability during dehydration in a dehydrating washing machine.

(d) Means for Solving the Problems The dehydrating washing machine of the present invention includes a dehydrating tank shaft for supporting the dehydrating tank, an upper bearing for supporting the dehydrating tank shaft, and an upper bearing for supporting the upper bearing. a case, a gear case provided at the lower end of the dehydration tank shaft, a gear device installed inside the gear case, a dehydration drive shaft protruding from the bottom surface of the gear case, and a lower bearing supporting the dehydration drive shaft. and a lower bearing case that supports the lower bearing, a cylindrical brake drum is disposed around the gear case, and the upper end of the brake drum is positioned above other members near the drum surface. It is located.

(e) Effect In other words, even if the lubricating oil leaked from the gear device or the upper bearing scatters, it will be blocked by the inner surface of the brake drum, and even if some of it scatters from the upper end of the brake drum, it will be blocked by the upper end of the brake drum. Since the lubricating oil is located above other members close to the drum surface, it is possible to reduce the possibility that this scattered lubricating oil collides with the other members, bounces off, and adheres to the drum surface.

(F) Embodiments Examples of the present invention will be described based on the side views.
However, the same reference numerals are used for the same parts as in the conventional example, and the explanation is omitted.

Reference numeral 1 denotes a mounting base, to which the motor 107, a drain electromagnetic valve, a drain valve driving solenoid, etc., which will be described later, are attached, and is fixed to the outer bottom surface of the outer tank 102. An upper bearing case 2 is integrally formed on the mounting base 1, and the upper bearing 116 is supported by the case 2.

Inside the gear bases 117 and 118 are an outer case 4 on which the internal gear 3 is formed, a sun gear 5 to which the washing drive shaft 12 is connected, and four planets meshing between the internal gear 3 and the sun gear 5. A so-called planetary gear device 8 is provided internally, which is comprised of a carrier 7 that connects the gears 6 and the planetary gears 6 and to which the rotor shaft 123 is connected. The outer peripheral case 4 of the planetary gear device 8 is loosely fitted into the upper gear case 117. At this time, the lower gear case 118 is screwed onto the upper gear case 117 as shown in FIG. The screw-fastening portions 9 protrude inward at three locations, while the outer periphery case 4 has a convex portion that fits into the recesses 10 formed between the screw-stopping portions 9. 11... are formed, and a rotation preventing structure is formed by fitting these projections and recesses. Further, at this time, since a small distance is provided between the outer peripheral case 4 and the upper gear case 117, the planetary gear unit 8 itself can move by this distance, and the gears can be aligned automatically. The transmission performance between the two is improved. Moreover, by preventing rotation through the uneven fitting, the mounting work can be extremely simplified, and the outer peripheral case 4 can be made thinner, and the molding accuracy can be improved and the material cost can be reduced.

Reference numeral 12 designates a cylindrical brake drum with a bottom, which is open at its upper end and has an insertion opening 13 at its lower surface through which the dehydration drive shaft 120 is inserted. And first,
With the dewatering drive shaft 120 inserted into the insertion hole 13, the upper gear case 11 is inserted from its upper end surface.
7, and then the lower gear case 118 is loosely fitted into the rib 14 formed in an annular shape on the outer periphery of the lower end of the upper gear case 117, and finally the three parts are connected together with bolts 15 from below. Tighten. This co-tightening makes assembly work extremely easy, and the upper gear case 117 is attached to the brake drum 12.
Since the lower gear case 118 is loosely fitted into the upper gear case 117, centering work is easy and the centers will not shift when they are tightened together. Furthermore, by making the upper gear case 117 and the brake drum 12 separate members, the brake drum 12 can be made of iron to increase wear resistance, and the upper gear case 117, which has a complicated shape, can be made of aluminum die-casting, which is easy to process.

In particular, the so-called band brake type brake structure, which will be described later, has the advantage of quieter brake operation noise, but the drum surface is subject to severe wear and requires the use of a hard iron-based brake drum. This is necessary, and making the upper gear case 117 and the brake drum 12 separate members in this way is optimal for the band brake system.

Now, the peripheral edge of the insertion port 13 of the brake drum 12 is provided with a stepped portion 16 that is lowered by one step, and an annular space 17 is formed between the stepped portion 16 and the lower surface of the lower gear case 118. It is configured like this.

Reference numeral 18 denotes a lower bearing case made of sheet metal for supporting the lower bearing 121, and a cylindrical holding portion 19 into which the lower bearing 121 is press-fitted is drawn. and the holding part 1
9 is drawn deeper than the thickness of the lower bearing 121. The peripheral wall portion 20 of the lower bearing case 18 extends upward in close opposition to the brake drum 12, and is suspended from the mounting base 1 at a flange 21 that extends horizontally outward from its upper end 18a. It is fixed to the fixed part 22 with a bolt 23. Further, as shown in FIG. 1, the upper end 18a of the lower bearing case 18 is positioned lower than the upper end 12a of the brake drum 12, and temporarily fixed above the upper end 12a of the brake drum 12 for design reasons. Even if necessary, only the fixing portion 22 is allowed to extend upward. As a result, even if various lubricating oils used in the planetary gear unit 8, the upper bearing 116, the bearing 122, etc. leak and are scattered due to centrifugal force, there is a gap between the brake drum 12 and the lower bearing case 18. This makes it difficult for oil to enter the drum surface 12b of the brake drum 12, thereby reducing the reduction in braking performance caused by oil adhering to the drum surface 12b of the brake drum 12.

24 is a steel housing that houses the roller clutch 125;
This is for holding on the outer periphery of the dewatering drive shaft 120.

Reference numeral 25 denotes a resin holding member that surrounds the upper and lower surfaces of the housing 24, and an insertion portion 26 through which the dehydration drive shaft 120 is inserted is provided on the upper surface. Reference numeral 27 denotes a flange integrally extending from the peripheral side of the holding member 25, and a mounting portion for screwing bolts 28 is bored in the flange 27.

The side surface of the housing 24 and the holding member 25
In the enclosing surface of each, the entire circumference (may be partial)
Concave and convex portions 29 and 30 are formed for spline (or serration) connection to each other,
Furthermore, there is a radial gap between the uneven portions 29 and 30.
The size is adjusted so that C ₁ (approximately 0.5 mm to 1 mm) is formed.

Further, the flange 27 in the holding member 25
The diameter of the lower portion is set to be the same as that of the holding portion 19 of the lower bearing case 18 so that the fitting portion 31 is press-fitted into the upper portion of the lower bearing 121 of the holding portion 19 of the lower bearing case 18 .

The dewatering drive shaft 120, through which the roller clutch 125 and the holding member 25 are inserted, is supported by the lower bearing 121, and the housing 2
4 is placed on the upper surface of the lower bearing 121 via the washer 32, the holding member 25 is enclosed from above the housing 24 while engaging the concave and convex portions 29, 30, and the fitting portion 31 is Press fit into the holding part 19, and finally bolt 28...
The holding member 25 is tightened and fixed to the lower bearing case 18 at.

At this time, an annular projection 33 is provided on the upper edge of the insertion portion 26 to project upward, and the tip of the projection 33 is located within the insertion opening 13 provided in the brake drum 12. Said lower gear case 1
It is configured to closely face the lower surface of 18.

Such a roller clutch device has the following effects (a) to (f).

(a) When the dewatering drive shaft 120 rotates, the housing 24 of the roller clutch 125 closes in the gap.
The roller clutch 125 moves within a range of C ₁ to automatically align the roller clutch 125 with respect to the dewatering drive shaft 120. The vibration noise of the housing 24 generated by providing this gap _C1 is absorbed by the holding member 25 made of a resin material.

(b) Due to the existence of the gap _C1 , if the housing 24
Even if rust occurs on the surface of the housing 24, there is no fear that the mounting state of the housing 24 will shift due to the rust.

(c) By press-fitting the fitting part 31 of the holding member 25 into the holding part 19, this holding member 25 can be attached to the dehydration drive shaft 120 or the lower bearing 121.
, the holding member 25 can be fixed in a proper position, the holding member 25 can be positioned, and the bolt 28 can be fixed in a proper position.
The holding member 25 does not move when tightened.

(d) Since the lower end of the housing 24 is supported by the upper end of the lower bearing 121,
Accordingly, parts can be omitted and the cost can be reduced. At this time, the housing 24 is preferably supported by placing it on the upper end of the outer race of the lower bearing 121, and the washer 32
The outer race may be placed as is without using the outer race, or a rib may be formed on the upper surface of the outer race and the outer race may be placed on the rib.

(e) Since the annular protrusion 33 close to the lower gear case 118 is provided at the upper end of the insertion portion 26 of the holding member 25, the roller clutch 1 can be inserted from the upper edge of the insertion portion 26.
25, and even if water droplets condensed on the lower surface of the lower gear case 118 or the brake drum 12 fall onto the upper surface of the holding member 25, they are blocked by the protrusion 33 and fall into the insertion portion 26. There isn't. Therefore, the roller clutch 12
Part 5 can prevent rust from forming.

(f) Since the peripheral edge of the insertion hole 13 of the brake drum 12 is lowered one step and the tip of the annular protrusion 33 is positioned within the insertion hole 13, the grease used in the roller clutch 125 is caused to protrude by centrifugal force. 33, the grease can be stored in the space 17 formed by the periphery of the insertion port 13 and the lower surface of the lower gear case 118, and this grease will not adhere to the drum surface 12b of the brake drum 12, improving braking performance. can prevent a decline in

Incidentally, in the case where the housing itself holds the roller clutch as in the conventional example, the housing also serves as a holding member.

Next, the brake structure will be explained based on FIGS. 4 and 5. Reference numeral 34 denotes a belt-shaped brake band wound around the drum surface 12b of the brake drum 12, and a brake shoe 35 that presses against the drum surface 12b is disposed on the inner surface. One end 36 of the brake band 34 is fixed to the peripheral wall 20 of the lower bearing case 18 with a screw 39 between parallel openings 37 and 38, and the other end 40 is cylindrical. It is bent and pivotally supported by one end 42 of the brake lever 41. and,
In the case of the brake band 34, both ends 36 and 40 are made wider than the middle part 43 (the part to which the brake shoe 35 is fixed), and the excess part is bent at 90 degrees at the one end 36. forming a flange portion 44 to increase the strength of this fixing portion, and suppressing rattling of the shaft support at the other end portion 40;
This is to ensure good braking action.

The brake lever 41 is supported by a shaft 45 on the mounting base 1, and is normally biased by a spring 46 to rotate in the direction of pulling the other end 40 of the brake band 34 (in the direction of tightening the brake band 34).

A drain valve 47 for discharging the washing water in the outer tub 102 and a drain solenoid 48 for opening and closing the drain valve 47 are attached to the mounting base 1. The drain solenoid 48 is connected via a connecting body 49, and the connecting body 49 is pulled by the excitation of the drain solenoid 48, and the drain valve 47 resists the biasing force of a spring (not shown) built in. It will be opened.

Thus, the other end 50 of the brake lever 41
is connected to the connecting body 49, and is rotated clockwise in FIG. 4 against the urging force of the spring 46 along with the excitation of the draining solenoid 48, thereby loosening the brake band 34 and releasing the brake pad. The pressure relationship between the u 35 and the drum surface 12b is released.

FIG. 6 shows the structure of the clutch device 110 and its vicinity. Reference numeral 51 denotes a clutch lever, and the clutch piece 129 is attached to the tip 52 of the clutch lever 51. The clutch lever 51 is coaxially supported with the brake lever 41, and is normally urged by a spring 53 to rotate in a direction in which the clutch piece 129 engages with the pawl wheel 128.

A locked piece 55 is formed at the other end 54 of the clutch lever 51. On the other hand, a locking piece 56 is formed at the other end of the brake lever 41, and this locked piece 55 and The locking piece 56 is arranged at a position where the drain valve solenoid 48 is energized and the locking piece 56 is locked when the brake lever 41 rotates in a direction to loosen the brake band 34. Therefore, when the brake lever 41 rotates, the locking piece 56 locks on the locked piece 55, and the clutch lever 51 rotates about the shaft support as a fulcrum against the biasing force of the spring 53. , the clutch piece 129
is removed from the pawl wheel 128.

In order to prevent deformation, the clutch lever 51 is made wide especially at its shaft support portion, so that the wide portion 57 can come into contact with the lower bearing case 18. conventionally,
When the clutch lever 51 rotates, the wide portion 57 is intentionally caused to collide with the lower bearing case 18 so that the clutch piece 129 engages with the pawl wheel 128 at an accurate position, but this method produces no collision noise. occurs and contributes to noise. On the other hand, in this embodiment, by adjusting the tension of the brake band 34 and the amount of movement of the connecting body 49, the clutch lever 51 is
Since the amount of rotation can be kept constant, there is no need to ensure an appropriate amount of movement by colliding with each other as in the conventional case. The structure is configured such that the collision noise is not generated.

Therefore, when washing, the drain solenoid 48
Since the excitation is cut off and the drain valve 47 is closed, the brake lever 41 and the clutch lever 51 are also held in their normal positions by the respective springs 46 and 53, and the brake band 34 is tightened to close the brake drum. 12 is applied with the brake, and at the same time the clutch piece 129 engages the pawl wheel 1.
28. Therefore, the rotational force of the motor 107 is not transmitted to the dehydration drive shaft 120, and only the rotary blade 105 rotates.

On the other hand, during dewatering, the drain solenoid 48 is energized and the drain valve 47 is opened, so the connecting body 4
9 rotates the brake lever 41 in the direction of loosening the brake band 34 and releases the brake, and at the same time the clutch lever 51 rotates and the clutch piece 129 separates from the pawl wheel 128. Therefore, the rotational force of the motor 107 is transmitted to the dehydration drive shaft 120, and the dehydration tank 103 is rotated.

(G) Effects of the Invention The present invention has a structure that prevents lubricating oil from adhering to the drum surface of the brake drum even if lubricating oil leaks from the gear device or bearing during spin-drying in a washing machine and is scattered due to centrifugal force. Therefore, it is possible to prevent a reduction in braking performance due to adhesion of this lubricating oil.

[Brief explanation of drawings]

Fig. 1 is a cross-sectional side view of the main part of the drive section in the dehydrating washing machine of the present invention, Fig. 2 is a bottom view of the planetary gear device, Fig. 3 is a sectional view of the roller clutch section, and Fig. 4
The figure is a bottom view showing the brake structure, Figure 5A is a plan view of the brake band, Figure 5B is a side view, Figure 5C is a view in the direction of arrow A, Figure 5D is a view in the direction of arrow B, FIG. 6 is a bottom view showing the clutch structure, FIG. 7 is a diagram of the internal mechanism of a conventional dehydrating washing machine, and FIG. 8 is a sectional view of a main part of the drive unit. 2... Upper bearing case, 8... Planetary gear set, 12... Brake drum, 12a... Upper end, 12b... Drum surface, 18... Lower bearing case (other parts), 103... Washing and dehydration tank ,
115... Dehydration tank shaft, 116... Upper bearing, 117... Upper gear case, 118... Lower gear case, 120... Dehydration drive shaft, 121...
lower bearing.

Claims (1)

[Claims] 1. A dehydration tank shaft for supporting the dehydration tank, an upper bearing that supports the dehydration tank shaft, an upper bearing case that supports the upper bearing, a gear case provided at the lower end of the dehydration tank shaft, and this gear case. a gear device installed inside the gear case, a dehydration drive shaft protruding from the lower surface of the gear case, and a lower bearing case supporting the dehydration drive shaft, and the gear case has a cylindrical shape with a drum surface as the outer peripheral surface. 1. A dehydrating washing machine which is inserted and fixed into a brake drum from an upper end opening thereof, wherein the upper end of the brake drum is made to protrude higher than other members close to the drum surface.