JPS5910212B2 - dishwasher - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a dishwasher in which a washing pump and a drain pump are driven by one motor, and each pump is driven independently via a switching clutch. The aim is to reduce the load and reduce noise.

An embodiment of the present invention will be described below with reference to the accompanying drawings.

In the figure, reference numeral 1 denotes the exterior of the dishwasher, which has a top plate 2 on its upper surface, an interior 3 with a front opening inside, and a front lid 4 disposed in this opening.

The interior 3 has two upper and lower tiers of tableware 5 and 6,
Washing liquid and rinsing liquid are spouted from the bottom of each tableware cup 5 and 6 by washing nozzles 7 and 8.

The ejected liquid accumulates in the recess 13 on the bottom of the interior, is sucked into the cleaning pump 11 from the suction hose 12 through the filter 14 housed therein, and is then ejected again from the cleaning nozzles 7 and 8. It is something that

Reference numeral 10 denotes a motor that drives a cleaning pump 11, and this motor is fixed to a frame 9 fixed to the bottom of the exterior via a vibration-proof rubber 15.

Reference numeral 16 denotes main body support legs provided on the lower surface of the exterior 1.

In addition, a drainage pump 17 is located next to the cleaning pump 11.
During the drainage process, water is sucked into the drainage pump 17 through the suction hose 19 from the drainage pipe 18 provided at the four parts 13 on the bottom of the interior, and is discharged from the discharge port 20 through the drainage hose to the outside of the machine. It is something that

The internal structure of the cleaning pump 11 will be explained with reference to FIGS. 2 and 3. A vortex chamber 23 is formed by two left and right casings 21 and 22, and a runner 24 is arranged in the center of this casing, and a vortex chamber 23 is arranged in the center of the casing. It is fixed to the tip of the runner shaft 32 arranged on the extension.

A mechanical seal 27 is arranged between the runner shaft 32 and the central boss portion 26 of the casing 21 to prevent water leakage.

The casing 22 has an inlet 28 at a position corresponding to the runner 24, and guides the cleaning liquid flowing from the suction hose 12 to the runner 24.

A motor pulley 29 that drives the drain pump 17 is installed on the motor shaft 25 via a clutch boss 33 and a pulley mounting plate 34 that are fixed with a pin 35. is connected to.

A ball bearing 36 is installed at the tip of the motor shaft 25, and has a connection boss 37 that connects the outer ring of the ball bearing 36 and the runner shaft 32.

The connection boss 37 and the runner shaft 32 are fixed with a set screw 38.

Further, the outer periphery of the diameter dog portion 42 of the connection boss 37 and the outer periphery of the clutch boss 33 have the same diameter, and a clutch spring 39 constituting a switching clutch is attached thereto.

A ball bearing 40 is provided on the outer periphery of the small diameter portion 43 of the connection boss 3γ, and its outer ring is press-fitted into the inner periphery of the motor pulley 29.

That is, the motor pulley 29 is held with respect to the motor shaft 25 by the clutch boss 33 and the pulley mounting plate 34 on the one hand, and the ball bearing 36 and the connecting boss 3 on the other hand.
1 and a ball bearing 40, which are loosely fitted and held.

Note that the runner shaft 32 is fixed to the runner 24 by molding.

41 indicates the large diameter portion of the tip of the runner shaft 32. Next, the internal structure of the drainage pump 17 will be explained.

The vortex chamber 44 of this pump also connects the casing 2L22 to 2
It is formed by combining sheets.

The vortex chamber 44 has a runner 45 inside, which is fixed to the tip of a runner shaft 48 that is rotatably supported using two metal pieces 4γ fitted into the casing boss 46 as bearings. ing.

The pump pulley 31 constituting the driven member is loosely fitted onto the runner shaft 48, and the two are connected via a switching clutch which will be described later.

Further, an oil seal 49 is arranged between the metal 47 and the runner 45 to prevent water in the vortex chamber 44 from leaking outside from the bearing section.

Further, the casing 22 has an inlet 50 at a position corresponding to the runner 45, and guides water flowing into the runner 45 through the suction hose 19 from the recess 13 on the interior bottom surface.

51 is a partition provided between the vortex chambers 23 and 44, and is formed integrally with the casing 2L22.

To explain the configuration of the switching clutch provided on the runner shaft 48, a pulley boss 52 provided inside the pump pulley 31
A clutch spring 57 is wound between the clutch boss 56 which is attached to the small diameter portion 53 of the runner shaft 48 with a washer 54 and a nut 55.

A ball bearing 58 is provided on the inner periphery of the pulley boss 52 and is mounted on the clutch boss 56 or the runner shaft 48.

Note that 59 indicates two metal parts 47 that pivotally support the runner shaft 48.
60 is an oil force bar to prevent oil leakage when filling the switching clutch with oil, and 61 is a metal that holds the outer circumference of the runner shaft 32, and is used for servicing etc. When the motor 10 and pump casings are disassembled during repair, they can be reassembled without using a special assembly gauge.

To explain the operation of the dishwasher described above, the clutch springs 39 and 57 are both clockwise wound, and when the motor 10 rotates to the left when viewed from the shaft side, the clutch spring 3
9 is loosened, and the clutch spring 57 is tightened.

That is, the clutch boss 33 and the connection boss 37 idle,
Clutch boss 56 and pulley boss 52 are connected by clutch spring 57.

Therefore, when the motor 10 rotates to the left, only the drainage pump 17 is driven to perform drainage.

Conversely, when the motor 10 rotates clockwise, only the cleaning pump 11 is driven and cleaning is performed.

Although cleaning and drainage are performed as described above, both pumps are not driven at the same time.

The switching clutches of the cleaning pump and drainage pump are filled with an appropriate amount of oil to withstand long-term operation.

Conventionally, in this type of dishwasher, one in which a washing pump and a drain pump are driven by one motor is known.

However, this method simply rotates the motor in the forward and reverse directions to switch between cleaning and draining, so the motor must drive both pumps for both cleaning and draining, resulting in an extra load and wasting power. In addition to this, there was a problem in that the cleaning pump generated a lot of noise when draining water.

Furthermore, there is a problem in that the shapes of the runner and the vortex chamber are restricted, making it impossible to obtain sufficient performance.

However, in the dishwasher of the present invention, the washing pump and the draining pump are driven independently by the action of the switching clutch, so there is no extra load on the motor as in the conventional case, and the washing pump and the draining pump are driven independently. No noise is generated from the cleaning pump, and since the runners are independent, sufficient performance can be obtained without any restrictions on shape.

Therefore, due to the small and compact drive configuration,
A quiet and high-performance dishwasher can be provided.

[Brief explanation of the drawing]

FIG. 1 is a schematic side sectional view of the entire dishwasher according to an embodiment of the present invention, FIG. 2 is an external perspective view of the pump section, and FIG. 3 is a detailed sectional view of the same pump section. 10...Moke, 11...Washing pump, 1γ...Drainage pump, 24, 25.
...Runner, 39,57...Switching clutch (clutch spring), 29,33...
Drive member (motor pulley, clutch boss), 31...
...Driven member (pump pulley).

Claims (1)

[Claims] 1. A cleaning pump that circulates cleaning liquid and rinsing liquid;
It has a drainage pump that discharges these liquids to the outside of the machine, both pumps are driven by a single motor, each has an independent swirl chamber, a runner, and a runner shaft.
It has a driving member connected to the drainage pump and a driving member connected to the runner shaft of the cleaning pump via a switching clutch, and a driven member is connected to the runner shaft of the drainage pump via the switching clutch. Dishwasher.