JPS59156386A - Speed reducer of one-tub type washer - 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 Field of the Invention The present invention relates to a speed reduction device for an oak-type household electric washing machine.

Conventional Structure and Problems The brake drum conventionally used in household washing machines has its upper end fixed to a cylindrical shaft connected to the inner tank by a method such as press fitting, and the lower end has a diameter larger than that of the upper end. The brake tram was enlarged to make contact with the brake band, and a reduction gear was installed inside the brake tram to slow down the rotation of the rotor blades. The gray kit tram is connected to the inner tank via a P:U cylinder simple shaft, and the inner tank and brake drum rotate at about 100 rpm during dewatering. When stopping the rotation of the inner tank, the brake band is brought into pressure contact with the brake drum to completely stop the brake drum, so frictional heat is generated between the brake drum and the brake band. - Since the inner circumferential surface of the rake drum and the outer circumferential surface of the internal gear are in close contact, the resin internal gear and other gears disposed inside the V-ki drum are Due to the adverse effects of heat, resin gears have had the problem of having to use expensive resin with high heat resistance. 1. Purpose of the Invention The present invention eliminates all of the above-mentioned drawbacks of the conventional technology. - The heat generated by the brake band when stopping the internal rotation from steady rotation has a negative thermal effect on the resin gears arranged in the brake drum. Is there a reduction gear for a single-tub washing machine that can completely prevent the heat generated during braking, where the outer periphery of the internal gear contacts the inside of the gray kit tram, from having an adverse thermal effect on the planetary gear reduction gear? The purpose is to provide.

Structure of the Invention In order to achieve the above-mentioned objects, the present invention provides a deceleration device for a single-tub washing machine, in which an inner tub serving as a washing and dewatering tub is surrounded by an outer tub and has a rotary blade at the center of the bottom, and is concentric with the upper end. Fixed to nf
Jc cylindrical shaft, a washing shaft having the rotary blade fixedly attached to the upper end, a bearing case and a bearing cover located below the outer tub and supporting the cylindrical sleeve and the washing shaft, and these bearings. A hollow brake drum and a drum bearing are housed in a case and a bearing cover and are connected to the cylindrical shaft, and the hollow brake has one end fixed to the bearing case and the other end pivoted to the operating lever. A brake band wound around a tram, a planetary gear reduction device configured with an internal gear, a planetary gear, and a sun gear and housed in the hollow brake drum and the drum member; A flange is provided on the outer peripheral surface of the upper part of the gear, and this flange is brought into contact with the inner peripheral surface of the hollow brake drum.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. Figure 1 is a longitudinal sectional view of a single-tub washing machine, Figure 2 is a longitudinal sectional view of the braking device and deceleration device portion of the same-tub washing machine, and Figure 3 is a bearing case and operating lever of the same type washing machine. FIG. In Figures 1 to 8, (
1) is the outer box of a single-tank washing machine, (2) is the top plate attached to the top of the outer box (1), (3) is the lid pivoted on the top plate 12), (4) is a hanging device with a built-in anti-vibration spring, (5) is an outer tank that is suspended and supported on the outer box (1) by a hanging device (4),
A substrate (6) is fixed to the outside of the bottom of the outer tank +51. A dewatering electric motor (7) and a washing electric motor (8) are fixed to this board (6), and a shaft support cover (9) and a bearing case αO, which house a braking device and a deceleration device inside, are fixed to the substrate (6). It is fixed concentrically with the outer tank (5). A bearing (+1) is fixed to the bearing cup <-(9) and the bearing case αO. θ2 is a cylindrical shaft, the upper end of which is connected to the inner tank through a coupling 1131'i, and the lower end is connected to a hollow brake drum (1
It is press-fitted to the top of the phrase. In the body of this hollow brake drum, there is a brake band (17) which has one end fixed to the bearing case αQ, the other end pivoted to the fully operating lever (I6), and a brake liner fixed to the inside. A stepped portion is formed on the upper outer circumferential surface of the body of the hollow brake drum and has a diameter smaller than the contact surface of the brake band (I?), and this stepped portion is similarly formed on the inner peripheral surface. Also, a drum holder (9) is fixed to the lower part of the brake drum (-), and this drum holder 01 has a plurality of protrusions protruding from its upper surface. The lower part is fixedly fitted into the lower bearing (Ill), and the lower part is formed into a Sen-jo shape in cross section. A dewatering driven pulley (9) having a hole with a corresponding cross-sectional shape is fitted and fixed on the outside!]1 This dewatering driven pulley (2) is connected to a dewatering electric motor (7) by a V-belt. On the output shaft of the dewatering electric motor (7), a driving pulley D integrally formed with a cooling device 71 is fixedly fitted.

As the dewatering electric motor (7) rotates, the dewatering driven pulley (4), the drum saucer, the hollow brake drum, and the inner tank (14) are rotated via the cylindrical shaft (121). When the operation %6t<-'Q6] is energized to the solenoid (c), the 4th
The brake band αη is in a released state with respect to the hollow brake drum 051 when it is attracted in the direction of the arrow in the figure.

To stop the rotation of the inner tank, when the power to the solenoid is cut off, the operating lever Qφ, which is pivoted on the operating V shaft (c), is moved in the direction of the arrow in Fig. 4 by the brake spring (c). The hollow brake drum (I5) is pressed against the hollow brake drum (L) and stopped by applying force in the opposite direction.At this time, the brake band (Iη force) and the hollow brake drum (I5) stop. ) Frictional heat is generated between the

The drum support (19) has a lower shaft (a) with a sun wheel formed concentrically in two parts, which is folded inside via a bearing, and a step is installed in the middle of the lower shaft and the container. The dewatering driven pulley 12 [I) is supported by a washer attached to this stepped part. The collar (C) that comes into contact with the washer (5) is fitted onto the outside, and the old driven boot! The washing driven day!J-(A is fixed externally to the output shaft of the washing motor (8) via the Vvet/@cooling fan integrally. Connected to the washbasin drive boo!J-(18)
ing.

On the other hand, a gear is formed on the inner circumferential side of the upper step part of the inner circumferential surface of the hollow brake drum (15), and the upper outer circumferential surface of the internal gear and the internal gear are tightly attached. The outer circumferential surface of the gear (to) has a diameter smaller at the lower side than the abutting surface with the hollow brake drum (15), and is generally a generally cylindrical surface with a flange formed at the upper part. is formed. As mentioned above, since the small diameter of the hollow brake drum (151) and the large diameter part of the internal gingival shaft are fitted,
Inner peripheral surface of hollow plate tram (I5) and internal gear (to)
A space is formed between the outer circumferential surface of Insulated. Also, the internal gear (to)
A recess is formed at the lower end of the drum support (19) to engage a protrusion protruding from the drum support (19), and the engagement between these projections and the recess allows the internal gear (to) to engage with the drum support (19). The planetary gear 6υ, which meshes with the internal tooth wheel, is supported by the support body and the support frame so that it can rotate and revolve.

The support (a) is externally fitted onto the lower end of the cylindrical shaft θ2, which has a cross-sectional shape, of a washing shaft which is fitted inside the cylindrical shaft θ2 via a bearing. A rotary blade (to) is externally fitted and fixed to the upper end of the washing shaft (b).

When the laundry electric motor (8) rotates, the laundry driven pulley handle, the lower shaft (c), the sun gear, internal gear (7), planetary gear (0) formed on this lower shaft, and the support frame (to) The rotation 8 (to) is rotated through the planetary gear reduction device constructed by the support and the support.

DETAILED DESCRIPTION OF THE INVENTION According to the present invention, a flange is provided on the outer peripheral surface of the upper part of the internal gear, and this flange is brought into contact with the inner peripheral surface of the hollow brake drum. B m between the brake band and the hollow brake drum, which occurs when stopping the rotation of the tank, is determined by the space formed between the inner circumferential surface of the hollow brake tram and the outer circumferential surface of the internal gear. It can be insulated and therefore prevent thermal deterioration of resin gears, as well as prevent lubricating oil from thermal deterioration, making it possible to stabilize quality. can be used.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal sectional view of a single-tank washing machine according to an embodiment of the present invention, Fig. 2 is a longitudinal sectional view of the braking device and deceleration device portion of the same-tank washing machine, and Fig. 8 is a longitudinal sectional view of the single-tank washing machine. It is a partially cutaway plan view of the bearing case portion of the washing machine and the operating/<-. (5)...Outer tank, (9)...Bearing cover, σG...
・Bearing case, +121...Cylindrical shaft, 04)・-・
Inner tank, (1 phrase...hollow) ゛V-citram, θη...
Brake band, (19)...drum holder, wire...internal gear, OD...planetary gear, spoon...washing shaft, etc.) ---Rotor agent Yoshihiro Morimoto 1st garden? Figure 2

Claims (1)

[Claims] L: A cylindrical shaft surrounded by an outer phase and having an inner tank as a washing and dehydrating tank having a rotation gt at the center of the bottom surface thereof is concentrically fixed to the upper end, and a washing shaft to which the rotary blade is fixed to the upper end. , a bearing case and a bearing cover that are located below the outer phase and support the cylindrical shaft and the washing shaft;
a hollow brake drum and a drum bearing, one end of which is fixed to the bearing case and the other end of which is pivotally supported by an operating lever, and the brake band is wound around the hollow brake drum, an internal gear, and a planetary gear. a sun gear and a planetary gear reduction device housed in the hollow brake drum and the drum; a flange protruding from the upper outer peripheral surface of the internal gear; A speed reducer for single-tub washing machines that is in contact with the inner circumferential surface of the brake drum.