JPS5852656B2 - dishwasher - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION A dishwasher is generally equipped with a cleaning pump that supplies jet water into a cleaning tank and a drain pump that discharges water from the cleaning tank to the outside of the machine.

Operating the washing pump and drain pump with one motor is advantageous in terms of cost and has been used in many dishwashers.

In the conventional type, a clutch mechanism is provided between the runner shaft of the cleaning pump and the motor shaft, and when the motor shaft rotates in the normal direction, the cleaning pump runner rotates, and when the motor shaft rotates in the reverse direction, it idles, and the runner is connected to the motor shaft. This system used a belt to transmit power from a fixed cleaning pump pulley to a drainage pump pulley to rotate the drainage pump runner shaft.

However, with this system, the drain pump rotates and presses regardless of whether the motor is running forward or reverse, and therefore the drain time is overwhelmingly longer than the drain time required for one cycle in a normal dishwasher. The problem was that the drain pump pulley rotated throughout the cleaning period.

Furthermore, when the motor rotates forward, the cleaning lamp runner rotates in the discharge direction, but the drain pump runner, which is rotated by the belt, rotates in the opposite direction to the discharge direction, so the water in the cleaning tank is cleaned. Although no water is drained into the tank, the bearing part of the drainage pump must be able to support the rotation of the runner shaft for the drainage pump even when the drainage is not being performed, and the wear of this bearing part is The disadvantage was that it was significantly faster than .

Therefore, in the present invention, a clutch is also provided on the drainage pump side, and this clutch stops the drainage pump runner shaft from rotating in a direction in which the drainage pump does not operate, thereby allowing the bearing that supports the drainage pump runner shaft to The aim is to prevent wear and tear and provide a dishwasher with greater durability.

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

In the figure, reference numeral 1 denotes a motor disposed outside and below the cleaning tank 2, and a clutch boss 4 button and a cleaning pump pulley 5 are fixed to the shaft 3 of the motor 1.

A cleaning roller clutch 6 is fixed within the cleaning pump pulley 5, and rotation transmission and idle rotation are performed between the roller clutch 6 and the cleaning pump runner shaft 7.

That is, when the motor shaft 3 rotates forward, the cleaning pump runner shaft 7
The cleaning pump runner 8 integrated therewith is rotated to operate the cleaning pump, and when the motor shaft 3 is reversed, it is idled between the cleaning pump runner shaft 7 and the roller clutch 6.

The drain pump is configured such that the power of the cleaning pump pulley 5 is transmitted to the drain pump pulley 10 by the belt 9, and the drain roller is disposed between the drain pump pulley 10 and the drain pump runner shaft 11. clutch 1
I am wearing 2.

The drainage roller clutch 2 and the drainage pump runner shaft 11 perform rotation transmission and idle rotation depending on the direction of rotation.

In the conventional system, even when the motor 1 rotates forward or reverse at the drain pump pulley 10, the drain pump runner shaft 11 rotates, and therefore the bearing 13 of the drain pump runner shaft 11 rotates. , it was necessary to support the rotation of the drain pump runner shaft 11 even during the washing operation, which was overwhelmingly longer than the drain time required for one cycle, but in one embodiment of the present invention, the washing tank 2 Since power is transmitted to the drainage pump runner shaft 11 only when the motor 1, which discharges the water inside, is running in reverse, and the motor 1 idles when rotating in the forward direction, wear on the bearing 13 is significantly reduced. .

In particular, as shown in FIG.
The cylindrical boss 14 is fixed to
a, and the bearing 13 fixed to the pump casing 15 side.
By sliding the rotation of the drain pump pulley 10 on the outer periphery of the cylindrical boss 14 via the drain roller clutch 12, and making the cylindrical boss 14 slide, the rotation of the drain pump pulley 10 is transmitted and idled on the outer periphery of the cylindrical boss 14. Since the bearing 13 needs only to receive the rotation transmitted by the clutch to the cylindrical boss 14 on its sliding surface with the flange 14a of the cylindrical boss 14, its durability is significantly improved.

Further, since the flange portion 14a of the cylindrical boss 14 also serves as a thrust bearing, which is conventionally fixed to the drain pump pulley 10, there is no need to provide a separate thrust bearing.

As is clear from the above embodiments, according to the present invention, a drainage roller clutch is provided between the drainage pump pulley and the drainage pump runner shaft, which are connected to the cleaning pump pulley via a belt. A roller clutch is used to stop the drainage pump runner shaft from rotating in a direction that does not allow it to operate as a drainage pump.
Wear of the bearing that supports the drainage pump runner shaft is significantly reduced, and as a result, the durability of the bearing can be significantly improved.

[Brief explanation of the drawing]

FIG. 1 is a side sectional view of a dishwasher showing an embodiment of the present invention, FIG. 2 is a sectional view of the washing button and drain pump portion of the same dishwasher, and FIG. 3 is a partial sectional view of the drain pump portion. FIG. 4 is a front sectional view of the washing button and drain pump portion. 1...Motor, 3...Motor shaft, 5.
... Pulley for washing pump, 6 ... Roller clutch for washing, 7 ... Runner shaft for washing pump, 9 ... Belt, 10 ...・Drainage pump pulley, 11...Drainage pump runner shaft, 12...Drainage roller clutch, 13.
... Bearing, 14 ... Cylindrical boss, 14a.
...Brim part, 15...Pump casing.

Claims (1)

[Scope of Claims] 1. In a dishwasher that operates a washing pump and a drain pump using a clutch mechanism by forward and reverse rotation of a single motor, a washing pump pulley fixed to the shaft of the motor is provided with a washing pump. A roller clutch for cleaning is fixed, and rotation transmission and idle rotation are performed between this roller clutch for cleaning and a runner shaft for a cleaning pump, and a pulley for a drainage pump and a drainage pump are connected to the cleaning pump pulley via a belt. A drainage roller clutch is provided between the pump runner shaft, and when the motor rotates in the forward direction, the cleaning pump runner rotates, and when the motor rotates in the reverse direction, the drain pump runner rotates, and when the motor rotates in the opposite direction, they are stopped. A dishwasher characterized by: 2. Fixing a cylindrical boss to the drainage pump runner shaft,
The flange of this cylindrical boss and the bearing end surface of the drainage pump runner shaft fixed to the pump casing side are slid together, and the rotation and idle rotation of the drainage pump pulley are transmitted to the cylindrical boss via the drainage roller clutch. 2. A dishwasher according to claim 1, wherein the washing is carried out around the outer periphery of the dishwasher.