JPS5844372B2 - dishwasher - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention includes a cleaning pump that circulates cleaning liquid and rinsing liquid, and a drainage pump that discharges the cleaning liquid and rinsing liquid to the outside of the machine, and both pumps are operated by one motor.
This invention relates to a dishwasher in which a clutch spring is used to switch between driving and stopping a drainage pump, and the object is to improve the durability of the clutch spring.

Hereinafter, one embodiment of the present invention will be described based on the accompanying drawings.

In the figure, 1 is a dishwasher main body, which has a top plate 2 on the top surface of the main body 1, and has an inner tank 3 with a front opening inside, and a front lid 4 at the front opening of the inner tank 3. has been set up.

Inside the inner tank 3 with the front lid 4 open, there are two upper and lower tiers of tableware heels 5 and 6, and cleaning liquid is sprayed from the cleaning nozzles 7 and 8 from the bottom of each heel 5 and 6. It has become.

The sprayed cleaning liquid is then sprayed into the inner tank 3, but it collects again in the bottom recess 9, is filtered by the filter 10 housed therein, and passes through the suction hose 11 to the cleaning pump 12. sucked inside.

Further, the cleaning liquid is pressurized by the cleaning pump 12 and is again jetted out from the cleaning nozzles 7 and 8 described above.

Reference numeral 13 denotes a motor that drives the cleaning pump 12.
It is fixed via 5.

Reference numeral 16 indicates main body support legs provided at the bottom of the main body 1.

Also, a drainage pump 17 is located next to the cleaning pump 12.
During the drainage process, the water is sucked into the drainage pump 17 through the suction hose 19 by the drainage pump 18 provided in the bottom recess 13 of the inner tank 3, and then the drainage hose (not shown) is passed through the discharge port 20. and is ejected from the aircraft.

The interior of the cleaning pump 12 is as shown in FIG. 3, with two left and right pump casings 21 and 22 forming a vortex chamber 23, and a runner 24 disposed in the center of the pump casing 2L22. Shaft 2 of the motor 13 described above
It is rotatably fixed to the tip of 5.

Further, a mechanical seal 27 is provided between the motor shaft 25 and the central boss portion 26 of the casing 21 to prevent water leakage.

Furthermore, the casing 22 has an inlet 28 at a position corresponding to the runner 24 to guide the cleaning liquid flowing in from the suction hose 11 to the runner 24.

Further, a drive pulley 29 for driving the drainage pump 17 is freely attached to the intermediate portion of the motor shaft 25, and is connected to the pulley 31 of the drainage pump 17 via the drive bells 1 to 30. connected.

The drive boob IJ-29 is lubricated and slidably fitted to the motor shaft 25 via a metal 32, and power transmission from the motor shaft 25 is carried out by a clutch boss 34 and a clutch boss 34 fixed to the motor shaft 25 with a pin 33. Clutch boss IJ wrapped around the outer periphery of each boss portion 35 of drive pulley 29
This is done by 2G 36.

This clutch spring 36 is configured to switch between drive transmission and drive stop depending on the rotational direction of the motor shaft 25.

That is, if the rotation of the motor 13 during cleaning is set to clockwise, the winding direction of the clutch spring 36 is clockwise, and the clutch spring 36 is loosened during cleaning, so that the flow to the drain pump 17 is Power transmission is cut off and the drainage pump 17 is stopped.

Conversely, when draining water, the motor 13 rotates to the left, the clutch spring 36 wraps around the clutch boss 34 and the boss 35 of the drive pulley 29, rotates the drive pulley 29, and rotates the belt 30 and the pulley 31 of the drain pump 17. is rotated to rotate the drainage pump 17.

Next, the internal structure of the drainage pump 17 will be explained.
As shown in FIG. 4, the vortex chamber 37 of this drainage pump 17 is also formed by combining the two pump casings 21 and 22 described above.

A runner 38 is provided inside the vortex chamber 37, and the runner 38 is fixed to the tip of a runner shaft 39.

The runner shaft 39 is rotatably supported by two metals 41 fitted into the casing boss portion 40 as bearings.

Further, the pump pulley 31 is fixed to the runner shaft 39 by a set screw 31'.

An oil seal 4 is provided between the metal 41 and the runner 38.
2 is arranged to prevent water in the vortex chamber 37 from leaking to the outside from the bearing section.

Further, the casing 22 has an inlet 43 at a position corresponding to the runner 38, and this inlet 43 guides the drainage liquid flowing from the bottom recess 9 of the inner tank 3 through the suction hose 19 to the runner 38. be.

And as mentioned above, the pump casings 21 and 22
By overlapping the vortex chamber 2 of the cleaning pump 12
3 and a vortex chamber 37 of the drainage pump 17, and a partition wall 48 for separation is provided between the vortex chambers 23 and 37 to form an integral structure.

Reference numeral 44 denotes a cylindrical flange formed integrally with the central boss portion of the pump casing 21. This flange 44 is provided so as to cover the outer periphery of the clutch spring 36, thereby preventing the clutch spring 36 from dust and dirt. It not only prevents foreign matter such as water droplets from adhering to the clutch spring 36, but also prevents the lubricant applied to the inner circumference of the clutch spring 36 from being blown off by centrifugal force during rotation and falling to the floor. .

Reference numeral 45 denotes an oil reservoir recess provided in the drive pulley 29, and an annular oil-impregnated felt 46 is attached to the outer periphery of the oil-slip recess 45, and lubricating oil from the oil-impregnated felt 46 is supplied to the clutch spring 36. I try to do that.

Reference numeral 47 denotes a cover provided at the opening of the sound deadening recess 45, and this cover 47 prevents lubricating oil from flowing out from the opening of the four oil reservoir parts 46.

Generally, the clutch spring 36 is rotated while the motor shaft 25 is rotating.
If oil continues to be supplied to the engine, the clutch spring 36 itself is rotating at high speed, so it will be blown away by the force of the long trip.
Oil consumption increases.

However, in one embodiment of the present invention, the clutch spring 36 is provided in the oil sump recess 45 in the drive pulley 29.
Because it is provided on the inner circumference of the oil sump recess 45 during cleaning, when the drive pulley 29 is stopped due to the clutch spring 36 slipping, the oil from the oil-impregnated fer installed in the oil sump recess 45 flows downward. Clutch spring 36 flowing and sliding and boss portion 35 of 1 drive pulley 29
This provides adequate lubrication.

Further, during drainage, the clutch boss 34 and the drive pulley 29 are rotated together by the clutch spring 36.

At this time, the clutch spring 36 does not slide, so there is no need to supply oil, and in one embodiment of the present invention, the drive pulley 29 is rotating at high speed during this draining period, so the clutch spring 36 does not slide. The oil in the spring 36 is again supplied into the oil-impregnated felt 46 in the oil sump recess 45 by a deep flood force.

Since this operation is repeated, oil consumption is extremely small and oil is reliably supplied to the clutch spring 36.

As is clear from the above embodiments, according to the present invention, the drive pulley is provided with an oil sump recess for supplying lubricating oil to the clutch spring, and this oil sump recess is fitted with oil-impregnated felt. It is also possible to effectively replenish oil to the clutch spring that switches the operation of the pump on and off, thereby greatly improving the durability of the clutch spring.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram of a dishwasher showing an embodiment of the present invention;
FIG. 2 is a perspective view of the pump in the same dishwasher, FIG. 3 is a sectional view of the washing pump, and FIG. 4 is a sectional view of the drain pump. 12...Washing pump, 13...Motor, 17...Drainage pump, 25...
Motor shaft, 45... Oil sump recess, 46...
...Oil-impregnated felt, 47...Cover.

Claims (1)

[Scope of Claims] 1. A cleaning pump that circulates cleaning liquid and rinsing liquid, and a drainage pump that discharges the cleaning liquid and rinsing liquid to the outside of the machine, both pumps being driven by one motor, and A drive pulley for a drainage pump is freely mounted on the motor shaft, and a clutch spring is interposed between the drive pulley and the motor shaft, and the forward and reverse rotation of the motor causes the drainage pump to flow through the clutch spring. At the same time as switching the pump operation stop, the drive pulley is
A dishwasher characterized in that an oil sump recess is provided for supplying lubricating oil to a clutch spring, and an oil-impregnated felt is attached to the oil sump recess. 2. The dishwasher according to claim 1, characterized in that a cover is provided over the opening of the oil sump recess.