JPS624153B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a dehydrating and washing machine in which an agitating blade is rotationally driven via a gear mechanism disposed at the inner bottom of a rotating tub.

[Technical Background of the Invention] Recently, in dehydrating and washing machines, a pulsator, which is an agitating blade, is eccentrically arranged at the inner bottom of a rotating tank in order to improve the washing effect, and a gear that transmits rotation to the pulsator is also used. It has been considered to cover the mechanism with a gear case to prevent foreign objects from getting caught.

[Problems with the Background Art] However, the above configuration does not require the work of assembling the gears of the gear mechanism in a pivotally supported manner at the inner bottom of the rotating tank and attaching the gear case that covers them to the inner bottom of the rotating tank. The work had to be done by looking into the rotating tank for a long time, which made the work extremely difficult.

[Object of the Invention] An object of the present invention is to provide a dehydrating/washing machine which has a gear mechanism covered with a gear case to prevent foreign objects from getting caught in the machine and which has excellent assembly workability.

[Summary of the Invention] The present invention provides a gear case that is fixed to the bottom of a rotary tank and stores a driven gear in a rotatably supported state and a drive gear that is meshed with the driven gear, and a motor provided at the bottom of the gear case. an insertion part through which the upper end of the washing shaft driven by the washing shaft is inserted; and an engaging part and an engaged part that are provided on the upper end of the washing shaft and the drive gear and engage to enable rotation transmission when the washing shaft is inserted into the insertion part. This structure is characterized by the fact that the gear mechanism is made into a unit by having a joint part, which simplifies the installation to the inner bottom of the rotary tank.

[Embodiment of the Invention] An embodiment of the present invention will be described below with reference to FIGS. 1 to 4.

First, in Fig. 2 showing the overall configuration, 1 is an outer box of the dehydrating/washing machine, inside of which a water receiving tank 3 is elastically suspended via a hanging rod 2 of an elastic support mechanism. Inside the receiving tank 3, there is disposed a rotary tank 5 made of plastic, for example, and having a plurality of dehydrating holes 4 in its peripheral wall and serving as both a washing tank and a dehydrating tank. Reference numeral 6 denotes a lid frame attached to the open upper surface of the outer box 1, which forms a laundry entrance/exit 7 approximately in the center, and has an operation box 8 erected at the rear thereof, and a time switch 9 installed in the operation box 8. is attached. Reference numeral 10 denotes a housing fixed to the outer bottom of the water receiving tank 3, into which a hollow dewatering shaft 11 is rotatably inserted and supported, as shown in FIG. As shown in detail in the figure, a connecting cylinder 12 is fitted to the upper end of the dehydration shaft 11 so as to project from the housing 10. Reference numeral 13 denotes a washing shaft, which is rotatably inserted and supported within the dewatering shaft 11, and whose upper end protrudes upward through a sealing member 14 fitted into the upper end of the cylindrical body 12.
An engagement pin 15 serving as an engagement portion that engages with a drive gear described later is press-fitted in the vicinity of the upper end in the radial direction.
The dewatering shaft 11 and washing shaft 13 are connected to a motor 18 via a clutch mechanism 16 and a belt transmission mechanism 17, as shown in FIG. It has become selectively transmitted. on the other hand,
A recess 19 for accommodating a pulsator is eccentrically formed at the bottom of the rotating tank 5 by a predetermined amount, and a metal bottom plate 20 is fixed with a tack pin screw 21 so as to close the open lower surface of the recess 19 . Incidentally, the bottom of the recess 19a of the rotating tank 5 does not need to be formed of a separate bottom plate 20 as described above, but the bottom can be formed integrally with the rotating tank and a reinforcing plate can be attached to the outer bottom of the bottom. good. A fitting hole 22 is formed in the bottom plate 20 at a location that coincides with the center of the rotary tank 5, and the fitting hole 22 is fitted into the cylindrical body 12 to form a flange portion 12a of the cylindrical body 12. It is fixed with bolts 23 so that the rotating tank 5 is directly connected to the dewatering shaft 11.

On the other hand, 24 is a hollow flat gear case disposed in the recess 19, which includes a lid side case 25 and a bottom side case 26 made of transparent plastic, for example.
are vertically connected by a tuft pin screw 24a via a gasket 27, and a receiving cylinder portion 28 and a receiving recess 29 are formed approximately at the center of each case 25, 26 on the lid side and bottom side, respectively. Reference numeral 30 denotes an insertion hole which is an insertion part formed in the gear case 24, and has a size that allows the upper end of the washing shaft 13 to be inserted together with the engagement pin 15 into a part of the bottom case 26 that is eccentric from the receiving recess 29 by a predetermined amount. It is formed into a size,
A fitting tube 31 is concentrically protruded from the lower surface of the insertion hole 30 and is fitted to the upper end of the tube 12 via a packing 31a. Reference numeral 32 denotes a drive gear, the boss portion 32a of which protrudes slightly downward and is loosely fitted into the insertion hole 30. 33 is this boss part 32
For example, two pairs of engagement grooves are formed as the engaged portions formed in FIG. 3, and as shown in FIG. , with the width gradually increasing in the lower part,
When the boss portion 32a of the driving gear 32 is inserted into the washing shaft 13 from above, one pair of them engages with the engagement pin 15 of the washing shaft 13, and the driving gear 32 is inserted into the washing shaft 13.
It is designed to be pivotally supported so that rotation can be transmitted to.
Reference numeral 34 denotes a plastic internal gear as a driven gear, and this has a pivot 35 integrally attached approximately at the center of the end plate portion 34a, for example, by insert molding. It is rotatably supported by the receiving cylinder portion 28 and receiving recess 29 of each case 25, 26, and is rotatably housed in the gear case 24 in mesh with the drive gear 32. In this stored state, the stepped flat surface 34c on the lower surface of the outer peripheral edge of the end plate portion 34a that is connected to the upper end of the inner tooth 34b is located above the tooth 32b of the drive gear 32 with a slight gap therebetween. The drive gear 32 is prevented from moving upward. Reference numeral 36 designates one or more through holes formed in the end plate portion 34a of the internal gear 34, which allows the lid side case 25 to be made of a transparent material as described above and also allows the drive gear 32 and the washing shaft 13 to be connected to each other. The fitting portion can be visually observed from the outside of the upper part of the gear case 24. In addition, 37 is the lid side case 25 and the pivot 3
This is a sealing member that seals between 5 and 5. The gear case 24 has mounting legs 25a provided intermittently on the outer periphery of the lid side case 25 with bolts 38.
It is fixed to the bottom plate 20 by screwing it approximately concentrically with the recess 19. A pulsator 39 is a stirring blade screwed to the upper end of a pivot 35 projecting upward from the gear case 24.

Next, the procedure for assembling the above structure will be explained with reference to FIG. First, the reinforcing bottom plate 20 is fixed to the bottom of the rotary tank 5 with screws 21, and the rotary tank 5 is connected to the cylindrical body 12 that protrudes upward from the bottom of the water receiving tank 3.
Fix it with bolts 23. On the other hand, apart from this, the insertion hole 3 of the bottom case 26 of the gear case 24 is
The lower end of the boss portion 32a of the drive gear 32 is fitted into the lower end of the boss portion 32a of the drive gear 32 to hold it in a positioned state, and the internal gear 34 is placed so as to cover the drive gear 32, and the lower end of the pivot shaft 35 is inserted into the receiving part of the bottom case 26. It is fitted into the recess 29 and the gears 32 and 34 are brought into mesh with each other. Then, the lid-side case 25 is connected to the pivot 3 by the receiving cylinder portion 28.
5, and put it on the bottom case 26 via the packing 27, and connect both cases 25 and 26 with the tassel pin screws 24a to assemble the gear unit A. After this, for example, by attaching the discharge hose of the air compressor to the insertion hole 30 of the bottom case 26 and forcing air into the gear case 24, the sealing properties of the sealing member 37 and the packing 27 are tested in advance. can do. After that, with the gasket 31a placed inside the fitting cylinder 31 of the bottom case 26, the gear unit A is inserted into the rotating tank 5, and the insertion hole 30 of the bottom case 26 is inserted into the upper end of the washing tank 13. If you insert it through the
The washing shaft 13 fits into the boss portion 32a of the drive gear 32, and the engagement pin 15 and the engagement groove 33 engage with each other, so that the drive gear 32 is pivotally supported on the upper end of the washing shaft 13 so that rotation can be transmitted. . At this time, if the engagement groove 33 of the drive gear 32 and the engagement pin 15 are in a misaligned state, the slope portion 33a of the engagement groove 33 comes into contact with the engagement pin 15 of the washing shaft 13, and the drive gear 32 is pushed upward, but the drive gear 32
The upper surface part of the tooth 32b is the end plate part 34a of the internal gear 34.
Since it comes into contact with the stepped flat surface 34c from below and is prevented from moving upward, the drive gear 32 or the washing shaft 13 rotates slightly while being guided by the slope portion 33a, and the engagement groove 33 becomes fully engaged with the engagement pin 15. This gear unit A
When the drive gear 32 and the upper end of the washing shaft 13 are fitted, the fitting part between the drive gear 32 and the upper end of the washing shaft 13 can be directly seen through the transparent lid side case 25 and the through hole 36 of the end plate part 34a of the internal gear 34. This is very convenient. In this way, the lid side case 25 is attached to the bottom plate 20.
After arranging the mounting legs 25a on the top, the mounting legs 25a are fixed to the bottom plate 20 with bolts 38, and the pulsator 39 is screwed onto the pivot 35 to complete the assembly.

In the above configuration, when the washing shaft 13 is rotated, the pulsator 39 is rotationally driven via the drive gear 32 and the internal gear 34, and washing is performed. In this state, the drive gear 32 is connected to the end plate portion 34 of the internal gear 34.
The stepped flat surface 34c of a prevents upward movement, and the engagement pin 15 prevents downward movement, thereby allowing the driving gear 32 to maintain its meshing state with the internal gear 34 without coming off. maintain. Furthermore, since the drive gear 32 and the internal gear 34 are watertightly covered by the gear case 24, foreign substances such as sand and lint can be washed away by the washing water and removed from the gears 32, 34.
It is possible to reliably prevent problems such as locking of the gears 32 and 34 and abnormal wear caused by the intrusion into the meshing portion of the gears 32 and 34.

In this way, in this embodiment, the relatively complicated gear unit A can be assembled separately from the deep-bottomed, large and difficult-to-handle rotating tank 5, and the assembled gear unit A can be attached to the rotating tank 5. The detailed assembly work A can be performed, for example, on a workbench in addition to the large rotary tank 5, resulting in excellent workability. Moreover, in order to attach the conventional gear mechanism covered by a gear case to the inner bottom of the rotating tank, it is necessary to insert your hand into the inner bottom of the rotating tank and assemble the bottom case, drive gear, internal gear, and lid case in sequence. However, in this embodiment, only the gear unit A assembled as described above needs to be attached to the rotating tank 5.
The work of inserting one's hand into the rotating tank can be completed in a short time, and the overall ease of assembly work can be greatly improved. Further, even if the gear mechanism needs to be inspected or repaired, it can be inspected or replaced by removing the entire gear unit A from the rotary tank 5, making maintenance work easy.

In this embodiment, the engaging portion and the engaged portion are constituted by the engaging pin 15 provided on the washing shaft 13 and the engaging groove 33 formed on the drive gear 32, but the present invention is not limited to this. For example, the upper end of the washing shaft may be a spline shaft or a serration shaft, and the boss portion of the drive gear may be formed with engagement grooves that fit into each of these shafts. Further, in this embodiment, the driven gear is constituted by the internal gear 34, but it may be constituted by an external gear 40, for example, as shown in FIG. The presser flange 41 may be extended, and the stepped flat surface 41 on the lower surface of the inner peripheral edge of the presser flange 41, which is connected to the upper end of the tooth 40a, may act as a stop. Furthermore, the gear mechanism shown in Figs.
It goes without saying that it is not limited to what is shown in the figure, and may be a planetary gear mechanism, for example.

[Effects of the Invention] As described above, the present invention has a driving gear and a driven gear housed in a gear case to form a unit, so that the assembly of a gear mechanism that requires detailed work can be done without the need for a large and difficult-to-handle rotating gear mechanism. This can be done separately from the rotating tank, which simplifies the work, and the work of inserting one's hand into the rotating tank can be completed by simply installing this gear unit, so overall assembly work efficiency can be greatly improved. This has excellent effects.

[Brief explanation of the drawing]

1 to 4 show an embodiment of the present invention,
Fig. 1 is an enlarged longitudinal sectional view of the main parts, Fig. 2 is a longitudinal sectional view of the whole, Fig. 3 is a perspective view of the driving gear, Fig. 4 is an exploded longitudinal sectional view of the main parts, and Fig. 5 is the present invention. It is a longitudinal sectional view showing a modification of . In the figure, 5 is a rotating tank, 13 is a washing shaft, 15 is an engagement pin (engagement part), 18 is a motor, 24 is a gear case, 30 is an insertion tag (insertion part), 32 is a drive gear,
33 is an engagement groove (engaged part), 34 is an internal gear (driven gear), 39 is a pulsator (stirring blade), and 40 is an external gear (driven gear).

Claims (1)

[Claims] 1. A stirring blade disposed at the inner bottom of the rotary tank is driven to rotate via a drive gear connected to the upper end of a washing shaft driven by a motor and a driven gear meshed with the drive gear, in which the stirring blade is placed at the bottom of the rotary tank. a gear case that is fixed and stores the driven gear in a rotatably supported state and stores the driving gear in a meshed state with the driven gear; and an insertion part provided at the bottom of the gear case and into which the upper end of the washing shaft is inserted. , an engaging part and an engaged part that are provided on the upper end of the washing shaft and the drive gear and engage to transmit rotation as the washing shaft is inserted into the insertion part; Machine.