JPS62244741A - Washer liquid feeder for automobile - Google Patents

Abstract

PURPOSE:To reduce the number of pumps to one unit alone, by selecting rotation of a motor in both c.w. and c.c.w. directions, and feeding a washer liquid in a way of selecting it to both front and rear sides. CONSTITUTION:When a washer liquid is fed to window glass at the front side, a motor 2 is rotated clockwise. If so, an impeller 4 is rotated clockwise as well, and thereby pressure is produced in two discharge ports, but with relation to the rotational direction and these discharge ports, high pressure is produced there by oneside of these discharge ports. This pressure is conducted to inflow ports 9A and 9B of a selector valve 7, and since the inflow port 9A becomes higher pressure than the inflow port 9B, a float valve 8 is forcedly pressed to the side of the inflow port 9B, closing the inflow port 9B and an outflow port 10B. And, the washer liquid flows into an operating chamber from the inflow port 9A, and it is fed to a washer nozzle 11A at the front side from an outflow port 10A through a hose 24.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Application The present invention relates to an automobile washer fluid supply device, and more specifically, the present invention relates to a washer fluid supply device for an automobile. The washer fluid is supplied to the washer nozzle located in the washer nozzle.

BACKGROUND ART Conventionally, when supplying washer liquid to the front and rear windshield washer nozzles of an automobile, generally an otsuya tank and an otsuya bomb are provided on the front and rear sides, respectively. However, this requires two tanks and two pumps, which is very disadvantageous in terms of cost and installation work.

-” M +-1 person ^-to, -,'-1--)
j'i) h L-rs 1 to--: t A dual-mode type in which the L-pump is combined into one unit, the piping branches into the front side and the rear side, and a switching valve is installed at the branch part. have been proposed, but all of them have complicated structures and cannot be expected to reduce costs. For example, a device that combines three gears to switch the discharge l (see Utility Model Application Publication No. 111292/1983) has the drawback that the valve will not operate unless high hydraulic pressure is applied, and the structure is complicated. In addition, the switching valve that uses a magnet to operate (see Japanese Utility Model Publication No. 51-30182) has drawbacks such as a complicated valve structure and the need for a magnet, resulting in a significant increase in cost.

In addition, in this kind of dual mode washer,
EPO128446A1 is provided as one that does not require actuating means for a switching valve and has a relatively simple structure.

In this device, the impeller inside the pump is rotated in forward and reverse directions, and the washer fluid is switched and supplied from the two discharge ports of the pump to the two suction ports provided in the valve chambers that communicate with each other. At the same time, a Guyam ram is placed between them, and the Guyam ram is deformed by the suction liquid pressure to open and close the two opposing discharges [1].

However, in the above-mentioned apparatus, since the discharge ports are switched using the Guiyamuram, the following drawbacks occur.

■If the rubber of the diaphragm deteriorates, it will not easily operate under low hydraulic pressure, and due to deterioration, cracks will form in the diaphragm, causing holes and liquid flowing out through the holes to the outlets of both ridges, making it impossible to switch. obtain.

■Since the outer periphery of Guyamram is fixed to the wall of the valve chamber, the central part deforms diagonally to perform opening and closing operations.
The operation is not quick and the opening/closing operation is also not reliable.

■It is easy for dirt such as sand to get caught in the fixed part on the outer periphery of the diagram ram and cause it to become clogged, and in that case, the diagram ram will not easily deform and its operation will become uncertain.

■It takes a lot of work to install because the Guiyamuram must be inserted and fixed to the wall of the valve chamber.■If the type of Osha fluid is used, or if another fluid is accidentally put in, the diaphragm will deteriorate rapidly. Since the lifespan may be shortened, the washer fluid is limited.

■Since the deformed part of the diaphragm must be made thin,
Pinholes and the like may occur during molding, making quality control difficult and increasing the defective rate.

The purpose of the present invention is to solve the above-mentioned problems by using a float valve in place of the Guyam ram, as well as to simplify the structure and assembly work, reduce costs, etc. be.

To achieve the above object, the present invention provides an impeller driven by a forward and reverse rotation motor in a centrifugal type pump chamber that communicates with a washer fluid inlet provided in a casing. A switching valve is provided which has two inlets and two outlet ports that communicate with each of these water channels, and a switching valve that has two inlets and two outlet ports that communicate with these two outlet ports, respectively, which are switched depending on the direction of rotation of the impeller. , the above two inlets are arranged facing each other with a space between them, and the two outflow ports are arranged facing each other with a space between them, and one inlet and one outlet are arranged on the same side and are parallel on the same axis. A float valve is arranged between the inlet and outlet which are arranged opposite to each other, and the float valve is activated by the differential pressure generated between the opposing inlets and the hydraulic pressure of washer fluid flowing in from one inlet. The switching valve is configured to open the outflow port on the same side and simultaneously close the inflow port and outflow port on the other side, and connect the two outflow ports provided in the switching valve to the washer nozzles on the front side and the rear side, respectively. The present invention provides an automobile washer fluid supply device characterized in that it is connected to a nozzle located at a remote location.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be explained in detail with reference to embodiments shown in the drawings.

In FIG. 1 showing the entire washer fluid supply device,
1 is a casing, 2 is a forward/reverse rotation motor housed in the casing 1, 3 is a pump chamber formed on one end surface of the casing 1, and 4 is arranged within the pump chamber 3 and connected to the shaft 5 of the motor 2. An impeller that rotates in forward and reverse directions; 6, an oil inlet for supplying washer fluid to the pump chamber 3; 7, a switching valve communicating with the pump chamber 3; 8, a float valve disposed within the switching valve 7; 9A; , 9B are two inlets facing each other with the float valve 8 in between; 10A, IO;
Reference numeral B designates two outflow ports facing each other with the float valve 8 in between, and IIA and IIB designate a front washer nozzle and a rear washer nozzle that communicate with the outflow port 10A and IOH, respectively.

The pump chamber 3 is of a centrifugal type, and has two discharge ports 3a and 3b formed in the tangential direction on its side wall.
When the impeller 4 in the pump chamber 3 rotates in the forward direction (in the direction of the solid line arrow in the figure), washer fluid is discharged from the discharge port 1J3a, and when it rotates in the opposite direction (in the direction of the chain line arrow in the figure) L7, the washer fluid is discharged from the discharge port 3b. I try to discharge it from. The pump chamber 3 is provided by sealing a recess 11 formed in one end surface of the casing (1) and an end plate I3 that closes the recess Ia via a packing 12.

The valve box of the switching valve 7 also includes a valve box portion 1b protruding from one end of the casing l on the side where the pump chamber is formed, and an end plate 1.
3 pump chamber cover i1 (valve box part 1 provided more protrudingly)
3a are assembled facing each other.

That is, two-stage recesses 1c and Id with a circular cross section are formed in the valve box portion 1b of the casing I, and an annular partition wall 14 protrudes from the bottom surface of the small-diameter inner recess 1d, and the partition wall 14 partitions the inside of the small-diameter inner recess 1d. The outer circumferential groove portion is used as the inlet port 9A, and the central groove portion is used as the outlet port 10A. On the other hand, a two-step recess 13 with a circular cross section is also provided in the valve box portion 13a of the end plate I3.
b, 13c are provided, and the distal end surface of the recess IC on the casing side is abutted and fixed to the bottom surface of the recess 13b, and a valve operating chamber I5 is formed between the recess 1c and 13b. An annular partition file is provided in the recess 13c protruding from the bottom surface,
The outer peripheral groove of the partition wall 16 serves as an inlet 9B, and the central groove serves as an outlet 10B. A disk-shaped float valve 8 is loosely fitted into the valve operating chamber I5, and one side 8a of the float valve 8 covers the inlet 9A and the outlet 10A, and the other side 8b covers the inlet 9B. The size is set to cover the outflow port 10B.

Therefore, the inlets 9A and 9B are arranged to face each other with the float valve 8 in between, and the outlet 10A and IOB are arranged to face each other. and a valve seat 17 that is at the same height as the tip surface of the partition wall 14.16 on the tip surface of the outer peripheral wall of the inlet 9A19B,
The valve seat 14a (tip surface of the partition wall I4) of the outflow port 10A and the valve seat 17 of the inflow port 9A are aligned on the same axis, and similarly, the valve seat 16a (tip surface of the partition wall I4) of the outflow port 10B is on the same axis. 1
6) and the valve seat 18 are on the same axis. When the float valve 8 is in its neutral position, the valve seats 14a and 17.
It is located at an intermediate position slightly apart from 16a and 18, respectively, and is moved by the differential pressure generated between the inflow ports 9A and 9B and the liquid pressure flowing from the inflow port 9A or 9B, and the inflow port 9A and The valve seats 14a and 17 of the outflow port 10A or the valve seats 161.18 of the inflow port 9B and the outflow port 10B are vertically abutted to close the valve seats 14a and 17 at the same time. Note that the center of the float valve 8 has protrusions 8c and 8 that protrude to both sides.
d, and the protrusions 8c and 8d restrict the center of the float valve 8 to be located at the center of the outlet 10AS IOB.

One inlet port 9A of the switching valve 7 communicates with one of the two outlet ports 3a13b formed by branching into the pump chamber 3 via a water channel 20 bored in the casing 1. When the impeller 4 rotates forward, the washer fluid flows into the inlet 9A. In addition, the switching valve 7
The other inlet 9B of the pump chamber 3 is connected to the other outlet 3b of the pump chamber 3.
The gasket 12 and the end plate 13 are communicated with each other through water channels 21122 formed respectively, so that when the impeller 4 rotates in reverse, the osher fluid flows into the inlet 9B.

One outlet 10A of the switching valve 7 communicates with an outlet pipe 23 protruding from the casing I, and the outlet pipe 23 is connected to the washer nozzle IIA on the front side via a port 24.
Similarly, the other outlet 10B communicates with an outlet pipe 25 protruding from the end plate 13, and is connected via a hose 26 to a washer nozzle JIB on the rear side.

The impeller 4 disposed in the pump chamber 3 has two-stage blades, with a small-diameter blade 27 provided on the washer fluid intake port 6 side and a large-diameter blade 28 provided on the discharge side.
First, the washer liquid is rotated by the small-diameter blade 27 and then rotated by the large-diameter blade 28, thereby improving the rotation performance of the washer liquid.

In FIG. 1, 30 is a washer tank that supplies washer liquid to the washer liquid inlet 6 of the casing l;
1 is an outlet for connecting the motor 2 to a power source; 32
33 is a brush, 34 is a magnet, and 34 is a magnet.

In the apparatus having the above structure, when supplying the lubricant to the front windshield, a switch (not shown) is operated to rotate the motor 2 in the forward direction. When the impeller 4 is rotated in the forward direction by the motor 2, pressure is generated at the discharge ports 3a and 3b, but higher pressure is generated at the discharge port 3a due to the relationship between the rotation direction and the discharge ports. The pressure generated at the discharge ports 3a, 3b is the water channel 20, 21, 22.
The flow is conducted to the inlets 9A and 9B of the switching valve 7 through the valve seat 18, and since the pressure in the inlet 9A is higher than that in the inlet 9B, the float valve 8 is pressed toward the inlet 9B by the pressure difference, and the valve seat 18.
16a to close the inlet 9B and outlet 10B. In addition, when there is water in the pump chamber 3, the washer fluid flows into the float valve operating chamber 15 from the inlet 9A at the same time as the impeller 4 rotates, presses the float valve 8 with hydraulic pressure, and flows into the outlet. 10B and inlet 9B are closed. that time,
The shear liquid flows into the working chamber 15 from the annular inlet 9A and acts on the entire outer periphery of the float valve 8, so the float valve 8 moves without being tilted and moves vertically to the valve seats 16a, 1.
8 to reliably close the inlet 9B and outlet 10B. Therefore, the water shear liquid flows from the working chamber 15 into the outlet 10A, and from the outlet 10A passes through the outlet pipe 23 and the hose 24 to the front side water nozzle IIA.
supplied to. Similarly, when supplying washer fluid to the rear windshield, when the motor 2 is rotated in the opposite direction by a switch operation, the impeller 4 is rotated in the opposite direction and the discharge port 3b is rotated in the opposite direction.
Then, high pressure is introduced into the inlet 9B of the switching valve 7 through the water channel 21, 22, and washer fluid is introduced, and the float valve 8 is moved to come into contact with the valve seat 141, 17, and the inlet 9A is moved.
and the outflow port 10A are closed. Therefore, the washer fluid is supplied from the outlet 10B through the outlet pipe 25 and the hose 26 to the rear washer nozzle JIB.

In this way, according to this device, washer fluid can be switched and supplied to the front side and the rear side simply by switching the rotation of the motor in the forward and reverse directions. In addition, a float valve is used as a switching valve, and two inlets and two outlet ports are placed opposite each other with a slight gap between them, and the inlet and outlet ports are arranged on the same axis on the same side. Because the valve seat is arranged, the float valve operates with a low differential pressure to reliably close the inlet and outlet to the front or rear side at the same time, supplying washer fluid only to the other side, and opening and closing operation. is carried out quickly and reliably.

In addition, in a general centrifugal type pump, if there is no water in the pump chamber, it will idle and no washer fluid will be discharged, but in this device, the pump chamber 3 - discharge port 3a - water channel 20 - inlet 9A - valve operating chamber 15-Inflow Ro 9B-Waterway 22.2I-
Since the circulation path from the discharge port 3b to the pump chamber 3 is formed, even when there is no water in the pump chamber 3, the water in the circulation path can be primed, and idling does not occur.

The present invention is not limited to the above-mentioned embodiments, and FIGS.
The configurations shown in FIG. 1I and FIGS. 12 and 13 may also be used.

The embodiment shown in FIG. 9 has a two-layer structure in which the float valve is set at an angle of 8° and two halves of disc-shaped valve bodies 40A and 40B are connected by a spring 41, as shown in the figure. The float valve 8°
The spring 41 urges the valve bodies 4OA and 40B in the direction of separation, and until a pressure difference acts, the valve body 40A closes the inlet 9A and the outlet 10A, and the other valve body 40B closes the other. The inlet 9B and outlet 10B are closed.

When high pressure is introduced into the inlet port 9A of the float valve 8°, the valve element 40A is pressed against the spring 41 to open the outlet port 10A and allow washer fluid to flow out from the outlet port 10A. At this time, the valve body 4°B is pressed by the spring 41 and the high pressure from the inlet 9A, and keeps the outlet JOB and the inlet 9B closed. Conversely, when high pressure is introduced into the inlet 9B, the outflow DIOB is opened. Note that the other configurations are the same as those in the embodiment described in RIJ, so the same reference numerals are given and the explanation will be omitted. In this embodiment, the spring 41 may be replaced by an elastic body such as a sponge.

The embodiment shown in FIGS. 10 and 11 is a simpler structure of the embodiment shown in FIGS. 1 to 8,
On one side of the valve box of the switching valve 7', a tubular inlet 9△'' and an outlet 10A° are formed in parallel and continuous, and on the other side, an inlet 9B' and an outlet 10B'' of the same diameter are formed. is formed,
A float valve 8 is loosely fitted into a valve operating chamber 15' between opposing inlets 9Δ' and 9B' and outlet 10A' and JOBo. The inflow ports 9A' and 9I3' have water channels 5 that communicate with discharge ports 3a and 3b formed on the side wall of the pump chamber 3.
0.51, while the above-mentioned exits 10A and 10I
At 3°, outflow pipes 23° and 25° are connected. Note that the operation of this device is the same as that of the previous embodiment, so a description thereof will be omitted.

In the embodiment shown in FIGS. 12 and 13, the inflow port and the outflow port are reversed from the embodiment shown in FIGS. 1 to 8, and FIG. 12 is different from the embodiment shown in FIG. FIG. 13 shows a modification of FIG. 4. That is, the central groove section partitioned by the partition wall I4.16 of the valve chamber is defined as the inlet 9A'' communicating with the water channel 20 and the inlet 9B'' communicating with the channel 22, while the annular outer groove is defined as the outlet 10A''. , 10B=, and are in communication with the outflow pipes 23 and 25, respectively.The other configuration and operation of the device are the same as those of the previous embodiment, so their explanation will be omitted.

As is clear from the above explanation, according to the washer fluid supply device according to the present invention, the number of tanks and pumps for washer fluid to be supplied to the front side and the rear side can be 1, and moreover, Since the configuration is such that the pump chamber has two discharge ports and a valve box for a switching valve equipped with a float valve is added, a significant cost reduction can be achieved. Also,
Since the float valve is not fixed to the valve box and can slide freely, there is little pressure loss, there is no fear of the float valve becoming sagging or deforming, and it has excellent durability. For example, when compared with conventionally used diaphragms, it has the following effects.

■Since it is a float valve, it operates reliably with a small differential pressure, but in the case of a diaphragm, as it deteriorates, a large differential pressure is required.

■Float valves open and close by operating perpendicular to the valve seat, and the opening and closing operations are performed reliably in a small operating area, but in the case of a diaphragm, it is tilted and deformed, so it requires a large operating area, and Opening/closing operation becomes uncertain.

■Since it is a float valve, unlike a diaphragm, there is no possibility of malfunction caused by dirt clogging in the clamping part.

■When idling, a circulating flow occurs through the gap between the float valve and the valve chamber, quickly eliminating the idling, but in the case of a diaphragm, it is completely partitioned, so no circulating flow occurs and idling cannot be prevented.

■Float valves simply fit loosely into the valve operating chamber of the switching valve, so they require no installation effort, whereas diaphragms require a lot of work to secure, increasing installation costs.

■Since the float valve does not have a part corresponding to the thin wall part of the diaphragm, there will be no cracks due to deterioration or holes such as bone holes formed during molding.

■Since the float valve has a simple shape, defects do not occur as mentioned above. Therefore, quality control is easy and cost is low.

[Brief explanation of drawings]

Figure 1 is a sectional view of the washer fluid supply device according to the present invention, Figure 2 is a bottom view of Figure 1, and Figure 3 is a [-f] of Figure 2.
[Fig. 4 is an enlarged sectional view taken along line IV-■ in Fig. 2, Fig. 5 is a bottom view of the casing, Fig. 6 is an inner side view of the end plate, and Fig. 7 is an enlarged sectional view taken along line IV-■ in Fig. 2. 6 is a sectional view taken along the line ■-■ in FIG. 6, FIG. 8 is a sectional view taken along the line ■-■ in FIG. A partial cross-sectional view showing a modified example, FIG. 11 is the n-
The M-line sectional views, FIGS. 12 and 13, are modifications of FIGS. 3 and 4, respectively. 1...Casing 2...Motor 3...Pump chamber 3a, 3b...Discharge port 4...Impeller 6.
...Shear liquid suction lower...Switching valve 8...Float valve 9A. 9A...Inlet 10A, IOB...Outlet 11AS
IIB...Washer nozzle 12...Packkin
13... End plates 14a, 16a, 17.1 8
--- Valve seat 20.21.22... Waterway patent applicant Asmo Co., Ltd. 1 agent Patent attorney 2 people above Figure 2 N3 Figure 6 Hashi Proceedings Amendment form Patent Office Director General December 16, 1988 [Co 1, Indication of the case 3, Relationship with the person making the amendment Patent applicant address 390 Umeda, Kosai City, Shizuoka Prefecture Name Asmo Co., Ltd. (and 1 other person) 4. Agent address 540 2-1-61 Higashi District Mi, Osaka City, Osaka Prefecture
No. 6 Subject of amendment 7, Contents of amendment (1) The following parts of the description will be corrected. ■The "Detailed Description of the Invention" column will be corrected as follows.・Page 17, second line, next to "Omitted.""In addition, as shown in FIG. 14, a spring 42 that presses the float valve 8 to one side may be provided."
Insert. ■The "Brief explanation of drawings" column will be revised as follows.・Page 19, line 12, "This is a modified example." was corrected to "The modified example, Figure 14, is a modified example of Figure 10." (2) Add Figure 14 to the drawings. Figure 14

Claims (1)

[Claims] (1) An impeller driven by a forward/reverse rotation motor is provided in the pump chamber that communicates with the washer fluid intake port provided in the casing, and a water channel that communicates with two discharge ports of the pump chamber that can be switched depending on the direction of rotation of the impeller is provided. On the other hand, a switching valve is provided which has two inlets communicating with each of these waterways and has two outlets, and the two inlets are arranged opposite to each other with a space between them, and the two outlet ports are spaced apart from each other. An inlet and an outlet are arranged in parallel on the same axis, and a float valve is arranged between each of the opposed inlets, and one inlet and one outlet are arranged in parallel on the same side. The float valve is moved by the hydraulic pressure of the washer fluid flowing in from the inlet to open the outflow port on the same side and simultaneously close the other inflow port and outflow port, and A washer fluid supply device for an automobile, characterized in that two outflow ports are connected to washer nozzles located at separate positions, such as front and rear windshield washer nozzles.