JPS5849435Y2 - Washer pump inlet structure - Google Patents

Description

[Detailed Description of the Invention] This invention relates to an inlet structure that facilitates the removal of internal air in a washer pump for automobiles, etc., which supplies washer liquid from a tank to a washer nozzle.

As shown in FIG. 1, a conventional washer pump has a motor built into a main body 1, and when wired to a terminal 2 and turned on, an impeller 4 connected to a motor shaft 3 rotates.

A partition wall 5 is formed on the front surface of the impeller 4, and a ventilation hole 6 is bored in the upper edge of the partition wall 5.

When the washer fluid 7 is replenished into the tank in a state where the washer fluid 7 is low, the air present in the piping is inevitably sucked into the washer pump together with the washer fluid 7 from the inlet port 8.

When the washer pump is operated again after that, the washer fluid 7 may not be able to be delivered from the washer pump because the air that previously entered the washer pump has not been removed.

That is, when the washer pump is operated again, the washer liquid 7 fills the inlet portion 8 and traps air in the vicinity of the partition wall 5, as shown in FIG.

Although the partition wall 5 is provided with a ventilation hole 6, the air cannot escape from the inlet port 8 to the tank side due to the force of the water from the tank, and the air remains inside the partition wall 5 and a portion of the air remains inside the partition wall 5. 5
Although it is exposed to the outside 10, it is locally sealed near the partition wall 5.

Therefore, since the upper half of the impeller 4 is exposed to the air, the washer liquid 7 cannot be delivered.

In addition, such a problem is caused by, for example, Utility Model Application Publication No. 521653.
This phenomenon may also occur in the washer pump disclosed in Japanese Patent No. 02 or Japanese Utility Model Application No. 51-29442.

The present invention was devised in order to eliminate such problems, and in the cylindrical pipe forming the inflow port 8, there are two
A separator wall is provided to separate the parts.

Next, the detailed structure will be explained with reference to the drawings showing the embodiments from FIG. 2 onwards.

2 and 3 differ from the conventional structure shown in FIG. 1 in that a separator wall 11 is provided within the inlet portion 8.

The inlet portion 8 has the shape of a cylindrical tube, and is provided with a separator wall 11 that divides the cylindrical tube into upper and lower halves in the inflow direction of the washer liquid 7, that is, the longitudinal direction of the cylindrical tube.

This separator wall 11 extends from the inlet portion 80 to the impeller 4.
It reaches near the zero inlet section 12.

Therefore, when the washer pump is operated again, the washer fluid 7 flowing into the inlet port 8 is divided into two by the separator wall 11 into upper and lower halves.

As shown in FIG. 4, the inflowing washer liquid 7 first flows through the lower flow path 14 divided by the separator wall 11, and the excess flow through the upper flow path 13.

By dividing the flow path into upper and lower sections in this manner, most of the washer fluid 7 flows through the lower flow path 14 while being rectified, passes through the impeller 4, and is replenished from the outlet 15 to the tank.

Therefore, an air passage is left in the upper flow path 13 extending in the longitudinal direction of the cylindrical tube.

Therefore, air above the impeller 4, that is, inside 9 of the partition wall 5, is communicated to the outside 10 of the partition wall 5 in the direction of arrow A through a vent hole 6, and is discharged to the tank side through an upper flow path 13. .

In this way, air is not locally sealed in the upper half of the impeller 4, and most of the impeller 4 is immersed in the washer fluid 7, so the washer fluid 7 can always be delivered by operating the washer pump. It becomes.

As mentioned above, the present invention has a separator wall inside the cylindrical pipe that forms the inlet, forming a flow path above and below to remove the air inside, and although the structure is extremely simple, This has the feature that the function of the washer pump is reliably maintained.

[Brief explanation of the drawing]

Figure 1 is a front view of the conventional model with main parts broken, Figures 2~
4 shows an embodiment of the present invention, FIG. 2 is a front view of the main part broken away, FIG. 3 is a side view thereof, and FIG. 4 is a front view of the main part broken away showing the operating situation. 1...--Main body, 2...Terminal, 3...
-・Motor shaft, 4... Impeller, 5...
Partition wall, 6...- Ventilation hole, 7... Washer liquid, 8... Inflow port, 9... Inside, 10... Outside, 11... separator wall, 12... inlet section, 13... upper channel, 14... lower channel, 15... ... Outlet port, A... Ventilation direction.

Claims (1)

[Scope of utility model registration request] In a washer pump for automobiles that supplies washer liquid from a tank to a washer nozzle, a partition wall with a ventilation hole is provided in front of the impeller of the washer pump, and an impeller is installed along the inflow direction in the cylindrical pipe that forms the inlet. An inlet structure of a washer pump characterized by providing a separator wall that divides the upper and lower parts into two parts near the vehicle entrance.