JPH02116343A - Dishwasher - Google Patents

Abstract

PURPOSE:To improve safety to the leak of water, to reduce the number of parts and to simplify assembly by engaging one part of a washing pump with the outer circumference of one part in the frame of a motor and unitedly fastening the both pump and frame. CONSTITUTION:A frame 5g is constituted by integrally molding a frame 5-b of a motor 5, a bottom board part 5-c and the frame back part of the motor. A seal mechanism 16 is provided in a part corresponding to the bottom board part 5-c and the rotating part and fixing part of the motor are shaft-supported in the frame. Then, the motor 5 is constituted and the front part of the frame 5g of the motor 5 is fixed to the front frame 6a of a washing pump 6. Thus, the washing pump 6 and motor 5 can be directly fastened and fixed and further, since a pump casing 12 in a motor side and the frame 5-b of the motor are engaged, in the case of the assembly, shaft entering can be easily matched for a motor shaft 5-a and seal mechanism 16. Accordingly, the safety to the leak of the water from the seal mechanism 16 can be improved. Further, the number of the parts can be reduced and the assembly can be simplified.

Description

[Detailed description of the invention] Industrial applications The present invention relates to a dishwasher for washing dishes.

2. Description of the Related Art A conventional dishwasher of this type is shown in FIG.

That is, a cleaning tank 2 is provided inside the main body l, and water or hot water is supplied into the cleaning tank λ by a water supply valve 3. At this time, the water level detection device≠ adjusts the amount of water supplied to be suitable for cleaning. A cleaning pump 6 driven by a motor j is provided to circulate cleaning water. The cleaning water is sucked through a drainage hole 7 provided at the bottom of the cleaning tank 2,
It is sprayed from a cleaning nozzle t provided in the cleaning tank 2.

A heater is also provided to heat the cleaning water. A drawable basket IO is provided above the washing nozzle r in which tableware can be placed in an orderly manner. A door 1/ that can be opened and closed is provided in front of the cleaning tank 2 so that the car 1O can be pulled out.

Here, with reference to FIG. 5, the configuration of the motor and cleaning pump O will be explained in detail as follows.

The cleaning pump B has a spiral chamber formed by two pump casings // and /, which are fastened together with several screws 41a with a rubber backing 13 for sealing sandwiched between them. Inside it is the motor shaft j −
This impeller is provided with an impeller directly connected to a! Washing water can be circulated by rotating.

Next, in order to prevent water from leaking to the motor side, a sealing mechanism such as an oil seal or a mechanical seal is provided in the motor side pump casing/2. Further, a metal cleaning pump mounting plate /7 is fastened and fixed to the side surface of the motor j on the cleaning pump side with several screws /IA-, b in order to attach the cleaning pump 6. Then, the motor side pump casing /2 and the cleaning pump mounting plate 17 are fastened and fixed with several screws /4'-c. The actual assembly method is to assemble sequentially starting from the motor side.

Problems to be Solved by the Invention However, when looking at a structure like this, when assembling the motor side pump casing/2, the motor shirt is removed.
Extreme care must be taken to avoid misalignment of the axis of the seal [140] with respect to j-a. This is a very important matter because if the axis is misaligned, water will leak from the sealing mechanism.

Next, looking at the necessity of the cleaning pump mounting plate 17, the frame t-b of the motor is designed to mount the bearing of the shaft J'-a, fix the motor core, and align the axes of both. . ing.

For this purpose, the press-processed motor frame, t-
It is not possible to provide something like 7 lunges on the outer periphery of b for fastening and fixing the cleaning pump B. For installation, simply provide a screw hole near the center of the motor frame s-b.

Therefore, for example, motor side cleaning pump casing/2
If an attempt is made to directly fasten the seal mechanism/6, the seal mechanism/6 will become an obstruction, and a backing against water leakage will be required, increasing the possibility of water leakage.

From the above points, it is advantageous to use the cleaning pump mounting plate 17, but it requires parts such as the cleaning pump mounting plate/7 and screws for its installation, which complicates the structure and increases cost. It looks expensive.

Therefore, the present invention can be easily assembled by aligning the axes of the motor shaft ja and the seal mechanism/b without using the cleaning pump mounting plate 7, increasing safety against water leakage, By reducing the number of points and simplifying assembly,
The purpose is to obtain a cleaning pump at a low cost.

Means for Solving the Problems The present invention provides a dishwasher equipped with a washing tank and a washing pump that is driven by a motor and sucks washing water from the inner bottom of the washing tank and sprays washing water from a washing nozzle. A part of the frame of the washing pump is engaged with a part of the outer periphery of a part of the frame of the motor, and the two parts are fastened together. In addition, when using a molded motor in which the core, fill, etc. of the motor are molded with synthetic resin, part of the frame made of synthetic resin of the conomold motor is used. It is configured to become a part of the frame of the cleaning pump.

Function: The washing pump for a dishwasher according to the present invention can easily align the axes of the motor shaft and the sealing mechanism with the above structure. That is, the frame of the motor is manufactured with great precision in order to obtain the centricity of the shaft and motor core. Therefore, using the frame of the motor,
It can be engaged with a part of the outer periphery of the frame and used as a reference for aligning the axial center with the sealing mechanism.

In addition, by using part of the cleaning pump as part of the motor frame, the axial center of the motor shaft and seal mechanism can be determined automatically during manufacturing. Forming a part of the cleaning pump also has the same effect as described above.

Embodiment FIG. 1 shows a sectional view of an embodiment of the cleaning pump for a dishwasher according to the present invention.

The configuration of the washing pump for a dishwasher according to the present invention will be explained.

In the figure, the same reference numerals as in Fig. 1t and Fig. I5 indicate the same parts and parts.

In the figure, the motor-side pump casing 12, which constitutes a part of the volute chamber, has a motor frame t-b on the motor j side.
A cylindrical cylindrical part /2-a is integrally formed with the bottom plate part /2-7 so as to cover the motor shirt)!
;-a sealing mechanism/6 is integrally constructed. The cylindrical part/2-a is integrally configured with a plurality of mounting parts/2-2, and the motor frame t-b in front of the motor j is connected to the cylindrical part/2-a.
2-a, and the intermediate portion of the motor j is fastened and fixed at the mounting portion 2-2 by a plurality of screws ≠-d.

Here, the motor side pump casing/2 cylindrical part/
2- The inner diameter of a is only slightly larger than the outer circumferential diameter of the motor frame j-b, so there is no play when assembled, and the shaft center is not misaligned with respect to the motor shaft j-a. There is.

Therefore, when the motor side pump casing 12, which is integrally configured with the seal mechanism/6, is assembled to the motor j, the motor shaft! -a and the axial center of the seal mechanism /6 can be easily matched. And the accuracy is determined by the motor frame case ~b and the motor side pump casing 12.
The components are manufactured with the required precision because the accuracy is determined by the precision of the engaging part of the seal mechanism part 6 and the precision of the insertion part of the seal mechanism part/6.

As described above, in the present invention, the cleaning pump B and the motor can be directly fastened and fixed without using the cleaning pump mounting plate/7, and moreover, the motor-side pump casing 12 and the motor frame t-b can be engaged with each other. Easy to assemble the motor shaft! -A and seal mechanism/B can be aligned by 2 axes. Therefore, the sealing mechanism/
Safety against water leakage from Party B can be increased.

Furthermore, the number of parts can be reduced, assembly can be simplified, and an inexpensive cleaning pump 6 can be obtained. Also,
The outside of motor j is the motor as in this example! By completely covering the front half of the motor, it is possible to insulate and reduce the noise of motor j, such as the rotation sound and vibration noise of motor j.

A second example will be described.

In FIG. 2, a frame j-b in front of the washing pump side of the motor j is formed into a cylindrical body by molding synthetic resin.

At this time, a bottom plate part j--C, which includes the housing of the seal mechanism 16 and becomes a part of the cleaning pump B, is simultaneously molded at one end of the cylindrical frame j-b on the cleaning pump side.

This configuration combines the motor-side pump casing/2 of the first embodiment with the motor cleaning pump-side frame t-b.

A third embodiment is shown in FIG.

In this embodiment, the motor frame t-b.

The bottom plate part J--C and the rear part of the frame of the motor are integrally molded to form a frame jg, and a sealing mechanism is provided in the part corresponding to the bottom plate part j-C, so that the rotating part and the fixed part of the motor are installed in the frame. The motor j is supported by a shaft, and the motor frame is attached to the front frame O of the cleaning pump.
A cleaning pump is constructed by fixing the front part of g.

Effects of the Invention The present invention is configured such that a part of the cleaning pump is engaged with a part of the motor frame, or is also used as a part of the motor frame, so that it can be easily assembled by aligning the axes of the motor shaft and the seal mechanism. Therefore, the safety against water leakage of the sealing mechanism can be improved, and the number of parts is small and assembly is easy, so that an inexpensive cleaning pump can be obtained.

Furthermore, when a part of the cleaning pump is configured to cover the outside of the motor frame as in the first embodiment, effects such as reduction in motor engagement are produced.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view of a main part of a first embodiment of a dishwasher according to the present invention, FIG. 2 is a cross-sectional view of a main part of a second embodiment of a dishwasher according to the present invention, and FIG. FIG. 4 is a longitudinal sectional view of a conventional dishwasher, and FIG. 5 is a sectional view of essential parts of a conventional dishwasher. l: Main body, 2: Cleaning tank, 3: Water supply valve, ≠: Water level detection device, ! :motor, ! -a: Motor shaft, !
-b: Motor frame, ! −〇：Bottom plate part, ! -d,
j-e: Mounting part, 6: Cleaning pump, /2: Motor side pump casing, 16: Seal mechanism, 6a: Front frame of cleaning pump, jg: Synthetic resin motor frame. Patent applicant: Patent attorney representing Matsushita Electric Industrial Co., Ltd.
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Claims (1)

[Scope of Claims] 1. In a dishwasher equipped with a washing tank and a washing pump driven by a motor, which sucks washing water from the inner bottom of the washing tank and sprays washing water from a washing nozzle, one of the washing pumps is provided. A dishwasher in which the part is engaged with the outer periphery of a part of the frame of the motor and the two parts are integrally fastened. 2. The dishwasher according to claim 1, wherein a part of the frame of the washing pump also serves as a part of the frame of the motor. 3. Claim 1, wherein the motor is a molded motor, and a part of the frame made of synthetic resin of the molded motor becomes part of the frame of the washing pump.
Dishwasher as described in section.