JPH09131493A - Dehydrating washing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve positioning accuracy in assembling a spring collar, assembling workability thereof and reliability by providing an inclination to an engaged part of a spring clutch and a spring of the spring collar for controlling the tightening and loosening of the spring clutch. SOLUTION: A spring collar 130 is provided on the outer circumference of a clutch spring and an operation band 137 is wound on an outer circumference part. A mating groove is provided at a lower part of the spring collar 130 to be engaged with an engaging part of the clutch spring. A plurality of spring engaging grooves 164 are arranged at an upper part of the spring collar 130. The spring engaging grooves 134 are provided with an inclination part 134a in one direction thereof. As a result, when the spring collar 130 is inserted from above during the assembling period, positioning is possible in such a manner that a protruded/flat part 154b of the spring engaging groove 134 of the spring collar 130 will not get on the mating groove of the clutch spring.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a clutch for switching between washing and dehydration of a dehydration washing machine used mainly in ordinary households.

[0002]

2. Description of the Related Art In a clutch of a drive mechanism, a rotary object is washed by a rotary blade or a washing / dehydrating tub by switching a shaft for transmitting power by tightening and loosening two springs, a clutch spring 1 and a clutch spring 2. Switching between dehydration and dehydration and stopping the washing and dehydration tub (brake operation). When the clutch spring 1 is loosened, power is transmitted to the shaft that drives the rotary blades, and when the clutch spring 1 is tightened, power is transmitted to the shaft that drives the washing / dehydrating tub. Further, when the clutch spring 2 is tightened, the pressure-contacted brake plate and the shaft of the washing / dehydrating tub are connected, and the washing / dehydrating tub is stopped during dewatering and the washing / dehydrating tub is prevented from rotating during washing. A spring collar is one of the parts that is switched between tightening and loosening of the clutch spring 1 and the clutch spring 2, and the spring collar has engaging portions with the clutch spring 1 and the clutch spring 2, respectively, and an angle in a plane direction and Mounting affects the tightness and looseness of the spring. The engagement portion between the spring collar and the clutch spring 2 is provided with spring engagement grooves at the lower end of the spring collar at 15 ° intervals so that the engagement portion at the lower end of the clutch spring 2 does not need to be positioned within a tolerance range. However, there were many parallel planes in the convex portion.

[0003]

With the shape of the engaging portion described above, the spring collar is inserted into a predetermined position from above during assembly. However, depending on the dimensional tolerance of rising of the engaging portion at the lower end of the clutch spring 2, In some cases, the convex portion of the spring engagement groove at the lower end of the spring collar may ride on the rising edge of the engagement portion at the lower end of the clutch spring 2. At this time, the spring collar is inserted by rotating it in the plane direction to a position where it can be inserted. However, if the spring collar is rotated more than necessary, the engagement portion with the clutch spring 1 at the upper end of the spring collar shifts and the clutch spring 1 loosens. There was no or it was not tightened, which caused poor washing in which the rotor blades rotated in only one direction and poor spinning in which the washing / dehydrating tub did not rotate.

An object of the present invention is to provide a dewatering washing machine which is highly reliable and stable by improving the accuracy of the position where the spring collar is incorporated and improving the assembling workability.

[0005]

According to the present invention, the shape of the spring engaging groove at the lower end of the spring collar, which is the engaging portion between the spring collar and the clutch spring 2, is such that the flat portion of the convex portion is narrowed to form the spring. An inclined portion is provided on one side of the engaging groove.

The spring engagement groove has a shape in which the parallel flat portion of the convex portion is narrowed and an inclined portion is provided on one side of the spring engagement groove. The probability that the convex portion of the clutch spring 2 rides on the rising edge of the engaging portion at the lower end of the clutch spring 2 is reduced, and even when the convex portion of the clutch spring 2 rides, it is engaged by a small rotation of the spring collar. The reliability is improved and the workability is also improved.

[0007]

Embodiments of the present invention will be described with reference to the drawings. In FIG. 1, a synthetic resin outer tank 4 is vibration-supported by a suspension rod 2 and a vibration-proof spring 3 inside a box-shaped outer frame 1 made of a steel plate or the like. On the side wall of the outer tub 4, a rib 4a for attaching the suspension rod 2 and the vibration-proof spring 3 is formed. In the outer tub 4, a washing / dehydrating tub 5 having a substantially circular cross section and made of a stainless steel plate is provided. A balance ring 6 made of synthetic resin is attached to the upper end of the washing / dehydrating tub 5 with screws or the like. A number of dewatering holes 5a are provided in the side wall in the washing and dewatering tub 5. A hollow box-shaped or U-shaped filter case made of synthetic resin is attached to the side wall with screws or the like, and a filter 26 is attached to the upper part thereof. At the bottom of the washing / dehydrating tub 5, a lower balance ring 8 made of synthetic resin, which forms a recess for mounting the large-sized rotor 7, is attached by screws or the like. A synthetic resin tank cover 9 is fixed to the upper end of the outer tank 4 to prevent the laundry from falling between the outer tank 4 and the washing / dehydrating tank 5. To the outer bottom of the outer tub 4, a drainage device 10 and a drive device 13 for rotating the rotary vane 7 and the washing / dehydrating tub 5 are attached via a steel plate supporting bracket 14. As shown in FIG. 2, the support fitting 14 has a substantially box shape, and is fixed to the outer bottom portion of the outer tub 4 with a screw or the like.

The drainage device 10 includes a drain valve 11 connected to the inner bottom of the outer tub 4, and a drain hose 12 connected to the drain valve 11.
And As shown in FIG. 2, the drain valve 11 is attached to the lower bottom portion of the outer tub 4 with a screw 11a. The drain hose 12 may be the lower side wall of the outer frame 1 or the PP base 30.
1 is extended to the outside of the outer frame 1 through the hole 301a provided in the first frame.

As shown in FIGS. 1 and 2, the drive unit 13 includes a washing machine motor 15, a clutch mechanism 16, a transmission mechanism 17 for transmitting the rotation of the washing machine motor 15 to the clutch mechanism 16, and a washing / release mechanism. The braking device 18 for stopping the rotation of the water tank 5 and the rotation of the washing machine motor 15 are decelerated to rotate the rotor blades 7.
And a deceleration mechanism 19 that transmits the As shown in FIG. 2, the washing machine motor 15 is fixed to the support fitting by screws 15a.

The transmission mechanism 17 includes a first pulley 17a fixed to the rotating shaft of the washing machine motor 15 and a clutch mechanism 16.
The second pulley 17b arranged below the first pulley 17b
a and a belt 17c wound around the second pulley 17b.

Details of the clutch and brake will be described with reference to FIGS. 3 to 6. The upper case 101 supports a washing tub shaft 103 via an upper bearing 102. The spring hooking pin 104 is fixed to the upper case 101 by means such as caulking. The brake plate 114 has a lining 115 integrally formed on the outer periphery. The brake plate 114 is in play with the boss 116 at a play portion 117. The brake plate 114 is pressed against the brake plate 118 and the lower case 121 by a brake plate 118, a brake pressing spring 119, and a spring bolt 120. A solenoid 133 is locked to the lower arm portion 122 extending integrally from the brake pad 118. The boss 124 is engaged with the lower shaft 125 at the spline portion 126. The boss 124 has an inverted U-shaped spring engaging portion 1
27, and the bent portion 131 of the clutch spring 2129 is engaged with the engaging portion 127. Boss 116, boss 1
A clutch spring 2129 is engaged with the outer circumference of 24.

The clutch spring 2129 is engaged with the boss 116 and the boss 124 without any interference. The spring collar 130 is provided on the outer circumference of the clutch spring 2129, and the operation band 137 is wound around the outer circumference. A synthetic resin or the like is attached to the surface of the operation band 137 by electrostatic flocking or the like, and the operation band 137 and the spring collar 13 are attached.
Stabilizes the sliding torque of 0. There is a spring engaging groove (1) 133 in the lower part of the spring collar 130, and the clutch spring 1128
The spring collar 130 has a plurality of spring engaging grooves (2) 134. When the spring collar 130 is installed, the clutch spring 11
28 engaging portion (1) 135 and clutch spring 2129 engaging portion
(2) 1 so that it is not necessary to position the rising edge of 136
The spring engaging groove (2) 134 provided at intervals of 5 ° is engaged with the groove 134 abutting the engaging portion (2) 136 of the clutch spring 2129 to improve workability. The clutch spring 1128 engages with the boss 124 and the pulley boss 138 with a slight tightening margin, and the upper end of the clutch spring 1128 rises in the axial direction to form the hole 1 of the boss 124.
39 to prevent the clutch spring 1128 from slipping.

Further, the spring engagement groove (2) 1 of the spring collar 130
34, as shown in FIG. 6, as compared with the conventional product shown in FIG.
Inclined portion 134a in one direction of engaging portion 134 of the uneven spring groove
Is provided. Accordingly, when the spring collar 130 is inserted from above by an automatic assembling machine or by hand, the flat portion 134b of the convex portion of the spring engaging groove (2) 134 of the spring collar 130 is engaged with the engaging portion (2) of the clutch spring 2. It can be engaged at a predetermined position without riding on 136. As a result, it is possible to prevent a washing failure (rotating blade 7 rotates only in one direction), a dehydration failure (the washing / dehydrating tub 5 does not rotate), etc., which will be described later, which occurs when engaged at a position other than the predetermined position. .

Next, the operation at the time of driving will be described from the state where laundry and water enter the washing / dehydrating tub 5. When washing general clothes, first, when the second pulley 17b rotates in the L direction, the clutch spring 1128 is in the loosening direction, so that power is not transmitted, and the rotation of the second pulley 17b rotates with the gear shaft 141 and the reduction gear. It is transmitted to the rotary blade 7 through the blade shaft 142 and the blade shaft 143. At this time, washing and dewatering tank 5
Also tries to rotate due to inertia, but the washing / dehydrating tub 5 is prevented from rotating because it is fixed to the washing tub shaft 103 through the flange 144 at the bottom by a nut or the like.

When the second pulley 17b rotates in the R direction, the clutch spring 1128 is in the tightening direction, but the plunger 123a of the solenoid 123 and the operating band 13 are closed.
The rising portion 137a of No. 7 engages to lock the spring collar 130. At this time, the engaging portion 13 of the clutch spring 1128
5 is locked to the end portion 130a of the spring engagement groove (1) 133 of the spring collar 130, and the spring is transmitted to the rotary blade 7 similarly to the loosening. At this time, the coil spring 105 does not operate because it is in the loosening direction, but the lower shaft 125 that is integrally connected to the washing tub shaft 103 and the boss 124 via the spline portion 126 exerts a rotational force on the washing / dehydrating tub 5. Transmitted. At this time, since the bent portion 131 of the clutch spring 2129 and the spring engaging portion 127 of the boss 124 are engaged with each other, the clutch spring 2129 is not attached to the boss 124 and the boss 1.
It wraps around the outer periphery of 16 and is transmitted to the brake plate 114 via the loosening portion 117 of the boss 116 to prevent rotation. In this way, by fixing the washing / dehydrating tub 5 and reversing the rotary blades 7, general clothes can be washed by the scrubbing action and the water flow generated by the rotary blades 7.

At this time, the engaging portion of the clutch spring 2129
(2) 136 is the spring engagement groove (2) 13 of the spring collar 130.
Clutch spring when not engaged in position 4
The engagement collar 135 of 1128 is not engaged with the end 130a of the spring engagement groove (1) 133 of the spring collar 130 because the spring collar 130 is rotated several tens of degrees by the clutch spring 2, and the spring moves in the L direction. However, the rotor 7 is washed only by rotating in the L direction, resulting in poor washing.

Next, at the time of dehydration, after the drain valve 9 is opened to drain water, the solenoid 123 is energized and the plunger 12
3a is sucked, the operation band 137 is disengaged, and the spring collar 130 is set in a free state. At this time, by rotating the second pulley 17b in the R direction, the clutch spring 1128 becomes in the closing direction, and the rotation is transmitted to the lower shaft 125 and the washing tub shaft 103 via the pulley boss 138 and the boss, and the washing / dehydrating tub 5 Rotate at high speed.

At this time, the engaging portion (2) 13 of the clutch spring 2
6 is not engaged at the predetermined position of the spring engagement groove (2) 134 of the spring collar 130, the clutch spring 1128.
The engaging portion 135 of the
30 is rotated by several tens of degrees and is locked to the end portion 130a of the spring engagement groove (1) 133 of the spring collar 130, and the spring is loosened. Therefore, the lower shaft 1 via the pulley boss 138 and the boss.
25, the rotation is not transmitted to the washing tub shaft 103, and the washing / dehydrating tub 5 does not rotate, resulting in poor dehydration.

When braking, first the solenoid 123
Of the operating band 137 which is rotating at a high speed due to the plunger 123a protruding by stopping the energization of
Lock 7a. At this time, slippage occurs between the operating band 137 and the spring collar 130, and the rotation of the spring collar 130 does not stop immediately. However, due to the sliding resistance of the operating band 137 and the spring collar 130, the clutch spring 21
29 is wrapped around and the brake operates.

[0020]

According to the present invention, the workability of easily incorporating the spring collar at a predetermined position is improved, and a highly reliable (less washing failure and less dehydration failure) dewatering washing machine can be stably supplied. .

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a dehydration washing machine of the present invention.

FIG. 2 is a front view seen from the lower part of the dehydration washing machine.

FIG. 3 is a sectional view of a clutch unit.

FIG. 4 is a plan view seen from above when a spring collar is attached.

FIG. 5 is a side view of a conventional spring collar.

FIG. 6 is a side view of the spring collar of the present invention.

[Explanation of symbols]

128 ... Clutch spring, 130 ... Spring collar, 134 ...
Engaging groove of spring collar, 134a ... inclined portion, 134b ... flat portion.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Hiroshi Osugi 1-1-1 Higashitaga-cho, Hitachi, Hitachi, Ibaraki, Ltd. Electric Appliances Division, Hitachi, Ltd. Hitachi Ltd. (72) Tomoo Hamaguchi, Totaga, Hitachi, Ibaraki 1-1-1 Machi Incorporated company Hitachi Ltd. Electric Appliances Division Taga Headquarters

Claims (1)

[Claims] 1. An outer tub vibration-supported in an outer frame, a washing / dehydrating tub arranged in the outer tub, a rotary wing arranged in the washing / dehydrating tub, and the washing / dehydrating tub. A drive mechanism for rotating the rotary vane, a brake mechanism for fixing the washing / dehydrating tub, a control device for the drive mechanism, the drive mechanism arranged under the outer tub, and a drain valve not connected to the brake mechanism. In a dehydration washing machine equipped with the driving mechanism, an inclined portion is provided at an engaging portion with a spring of a spring collar for controlling tightening and loosening of a spring of a spring clutch for switching between washing and dehydration by tightening and loosening of a spring of the drive mechanism. Characteristic dehydration washing machine.