JP2577068Y2 - Washer pump - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a washer pump used for supplying a washer liquid in a washer tank to a washer nozzle.

[0002]

2. Description of the Related Art A conventional washer pump has a structure in which a motor chamber and a pump chamber are integrally formed, and an impeller for a centrifugal pump is fixed to an armature shaft projecting from the motor chamber into the pump chamber. The washer liquid suction hole communicating with the inside of the pump chamber is connected to the washer tank, and the washer liquid discharge hole also communicating with the inside of the pump chamber is connected to the washer nozzle via a tube. Is supplied to the washer nozzle side at a high pressure.

[0003]

However, in the conventional washer pump, as is apparent from the above description, for example, a washer nozzle is provided not only on the windshield side of the automobile but also on the rear glass side. In the case of supplying the liquid, a separate washer pump for the rear glass is provided, which is not preferable for reducing the weight of the vehicle body and reducing the cost. It was a conventional problem to solve.

[0004]

The purpose of the present invention is to pay attention to the above-mentioned conventional problems, and the washer fluid is changed in two directions by switching one washer pump without using two washer pumps separately. It is an object of the present invention to provide a washer pump capable of switching and feeding.

[0005]

SUMMARY OF THE INVENTION A washer pump according to the present invention comprises a windshield and a rear glass of an automobile.
A washer pump that supplies washer fluid to the
And a motor unit capable of rotating forward and reverse, and a motor of the motor unit
On the shaft, it accommodates a Lee Npera for the first and second regenerative pump arranged in parallel with each other, the pre-Symbol first-in Pera,
A first annular flow path surrounding the first impeller is formed.
A first pump chamber, the second i Npera to yield volume was, this
A second annular flow path surrounding the second impeller is formed.
A second pump chamber, a washer fluid suction holes before SL respectively communicate and a second annular flow path of the first first annular passage of the pump chamber and the second pump chamber, the first Pump room and
A first washer liquid discharge port communicating with the second pump;
A second washer fluid discharge port communicating with the pump chamber.
The first washer liquid discharge hole by the forward rotation of the motor
Supply washer liquid to the windshield, and
The second washer liquid discharge hole is formed by the reverse rotation of the motor unit.
For supplying washer fluid to the rear glass from
In the pressure pump, the outer diameter of the first impeller is
The outer diameter of the second impeller is larger than that of the first impeller.
The first annular flow path of the pump chamber of
At the communicating portion between the suction hole and the first washer liquid discharge hole.
A partition wall is provided on one side in the circumferential direction in the second direction.
The washer fluid suction is provided in the second annular flow path of the pump chamber.
A communication portion between the inlet and the second washer liquid discharge hole is provided.
The partition is provided on the other side in the circumferential direction of the washer, and the configuration of such a washer pump is a means for solving the above-mentioned conventional problems.

[0006]

[0007]

[Effect of the proposed] in the washer pump related to this invention is, Lee Npera for the first and second regeneration pump is the first you
Toward one side of the circle circumferentially in the preliminary second annular passage
Rotation of the motor shaft to each Rotation Te, the
In one pump chamber, communicating portion between the washer fluid suction hole of the first annular flow path, since only the Bimake圧by partitions provided on one side of the communicating portion, the first pump chamber The washer fluid is hardly sucked into the
C Ossha liquid wash fluid from the discharge holes can not be discharged. In the second pump chamber, the high negative pressure occurs in the communicating portion between the second annular passage washer fluid suction hole of the washer fluid to the second pump chamber through the washer fluid suction hole is sucked is, so that the washer fluid at high pressure from the second U Ossha liquid discharge hole for discharging.

[0008] On the contrary, for the first and second regeneration pump
When Lee Npera rotates the motor shaft to each Rotating toward the other side of the circle circumferential direction in the first and second annular flow paths, the second pump chamber, a second annular flow In the portion of the road communicating with the washer fluid suction hole, a slight negative pressure is generated by the partition provided on the other side of the communicating portion.
Most washer fluid is not drawn in the second pump chamber, thus, so that the washer fluid is not discharged from the second U Ossha liquid discharge hole. Further, in the first pump chamber, the high negative pressure occurs in the communicating portion between the first annular channel washer fluid suction hole of the first pump chamber through the washer fluid suction hole washer fluid is sucked from being made and the washer fluid of high pressure from the first U Ossha liquid discharge hole for discharging, this time, first i
The outer diameter of the impeller is larger than the outer diameter of the second impeller
The efficiency of the motor was maintained at the best
The washer spouted from the first washer liquid discharge port
The ejection pressure (or ejection amount) of the second washer fluid
The pressure (or jet pressure) of the washer fluid
Output) is higher (or more).
Jet pressure of washer nozzle on front glass side (or
Volume) is the pressure of the washer nozzle on the rear glass side
(Or more) than (or more) .

[0009]

BRIEF DESCRIPTION OF THE DRAWINGS FIG.

FIGS. 1 to 3 show an embodiment of a washer pump according to the present invention.

A washer pump 1 shown in FIG. 1 has a substantially cylindrical case 2 having an end cover 3 attached to the upper end of FIG. 1 of the case 2 and a partition 2a integrally formed at the lower end of FIG. Is provided.

In this case, a portion between the end cover 3 and the partition wall 2a of the case 2 is formed as a motor portion 10, and a portion between the magnets 11 fixed to the inner peripheral surface of the case 2 is formed.
An armature shaft (motor shaft) 13 of the armature 12 provided to be rotatable in the forward and reverse directions has an upper end supported by a bearing (not shown) mounted on the end cover 3 and a lower end provided in the center of the partition wall 2a. 14 is supported.

In the washer pump 1, the intermediate cover 4 and the lower cover 5 are sequentially mounted on the lower end of the case 2 so that the space between the partition 2a of the case 2 and the intermediate cover 4 and between the intermediate cover 4 and the lower cover are provided. 2 between cover 5
Pump chambers 20 and 30 are formed at the locations.

The pump chambers 20 and 30 are connected to the pump chambers 20 and 30 via a packing 15 mounted at the center of the partition 2 a of the case 2.
The lower end of the armature shaft 13 protrudes, with FIG. 1 above the port down <br/> flop chamber 20, the impeller 21 for regenerative pump fixed to the armature shaft 13 are accommodated, FIG. 1 on the lower side of the port down <br/> flop chamber 30, smaller than the outer diameter of which is fixed to the armature shaft 13 in a state that extends parallel with the impeller 21 either with Npera 2 1
Impeller 31 for playback pumps have outer diameter are accommodated.

Further, the pump chamber 20, 3 0, the circumferential edge groove 21a, 3 of the impeller 21, 31 accommodated in each
Annular passages 22 and 32 each surrounding 1a are formed ,
In these annular flow paths 22, 32, on the left side in the figure, a washer liquid suction hole 5a provided in the lower cover 5 is provided.
They communicate with each other via a case-side suction hole 2b and an intermediate cover-side suction hole 4b.

[0016] pump chamber 20, as shown in FIG. 2,
A partition 23 that blocks the annular flow path 22 is provided. The partition wall 23 is provided adjacent to the communication portion 22a between the annular flow path 22 and the case-side suction hole 2b on the clockwise side in FIG. 2, and further on the clockwise side in FIG. Axis 13
C Ossha solution discharge hole 2c provided in the radial direction to the case 2 extending in (FIG. 2 upper left oblique direction) are communicated.

Meanwhile, also in the pump chamber 30, as shown in FIG. 3, (shown in phantom in FIG. 1) partition wall 33 to block the annular channel 32 is provided. This partition wall 33 is provided adjacent to the communicating portion 32a between the annular flow passage 32 and the intermediate cover side suction hole 4b on the counterclockwise direction in FIG.
Further in Figure 3 counter-clockwise side of, and c O <br/> Ssha liquid discharge hole 4c provided in the case 2 extending in a radial direction of the armature shaft 13 (Fig. 3 left obliquely downward) and is communicated is there.

[0018] Then, the washer pump 1 serves to connect the washer fluid suction hole 5a of the lower cover 5 in the washer tank, not shown, U Ossha solution discharge hole 2 c, 4
c is connected to a washer nozzle on the front glass side and a washer nozzle on the rear glass side, not shown.

Reference numeral 3a in FIG. 1 denotes a connector portion, which holds a terminal for supplying power to the armature 12 via a brush (not shown).

In the washer pump 1 having the above structure,
When a power supply for rotating the armature shaft 13 of the motor unit 10 in the counterclockwise direction in FIGS. 2 and 3 is supplied via a terminal of the connector unit 3a by turning on a windshield switch (not shown), the armature with the rotation of the shaft 13, pump chamber 2
Impeller 21 in the 0 and the impeller 3 of the pump chamber 30
1 each rotate counterclockwise.

[0021] At this time, as shown in FIG. 2, pump chamber 2
Since the negative pressure is higher in the communicating portion 22a of the annular channel 22 and the case-side suction hole 2b of 0 occurs, the pump chamber 20, the washer fluid in the washer tank through washer fluid suction port 5a and the case-side suction hole 2b is sucked, the washer fluid is a spiral flow of high pressure by the rotation of the impeller 21, will be ejected from the U Ossha solution discharge hole 2c, the washer fluid is to be ejected from the washer nozzle of the windshield side.

Further, as shown in FIG. 3, communicating portion between the annular channel 32 and the cover-side suction hole 4b of the pump chamber 30 32
In a, since only fine negative pressure is generated by a partition wall 33 provided in the counter-clockwise side of the communicating portion 32a, the pump chamber 3
The washer fluid is rarely sucked into 0,
Therefore, since the washer fluid from the U Ossha solution discharge hole 4c will not be discharged, does not washer fluid is ejected from the washer nozzle of the rear glass side.

On the other hand, when power is supplied to turn the armature shaft 13 of the motor unit 10 clockwise in FIGS. 2 and 3 by turning on a rear glass switch (not shown), the rotation of the armature shaft 13 is stopped. together, the impeller 31 of the impeller 21 and the pump chamber 30 of the pump chamber 20 are each rotated in a clockwise direction.

[0024] At this time, as shown in FIG. 2, pump chamber 20
Communication part 2 between the annular flow path 22 and the case-side suction hole 2b
In 2a, since only the Bimake圧by partitions 23 provided on the clockwise side of the communicating portion 22a, it is hardly washer fluid in the pump chamber 20 is sucked, the washer fluid from the washer nozzle of the windshield side It does not erupt.

Further, as shown in FIG. 3, communicating portion between the annular channel 32 and the cover-side suction hole 4b of the pump chamber 30 32
Since the in a high vacuum, the pump chamber 30, the washer fluid in the washer tank is sucked through the washer fluid suction hole 5a and the cover-side suction hole 4b, the washer fluid is high pressure from U Ossha solution discharge hole 4c The washer liquid is ejected from the washer nozzle on the rear glass side.

[0026] In the washer pump 1, pump chamber 2
Since the outer diameter of the impeller 21 in 0 are large comb than the outer diameter of the impeller 31 of the pump chamber 30, in a state where <br/> efficiency of the motor unit 10 is kept in the uppermost good, windshield side of the washer jet pressure of the nozzle (or ejection amount) gully a <br/> ejection pressure of the washer nozzle of the glass side (or ejection amount) higher than would (or more).

[0027] The detailed configuration of the washer pump according to this invention is not limited to the embodiments described above, for example, U Ossha liquid suction port 5a and washer fluid discharge hole 2c, and the discharge direction of 4c It can be changed as appropriate according to the installation status of the washer pump.

[0028]

As it has been described above devised], the washer pump according to this invention, because has a structure as described above, by switching the rotation direction of the motor shaft, a first U O Tsu <br/> finisher solution discharge hole a and the second U Ossha liquid discharge hole via the two directions to be able to be delivered switched washer fluid, feeding the washer fluid provided washer nozzle to the rear glass side as well windshield side of the motor vehicle even when formed as a sheet, it is not necessary to provide two washer pump, also it can in contribute to any reduction and cost reduction of the vehicle weight, in addition, Mo
While maintaining the best efficiency of the
Adjust the ejection pressure (or ejection amount) of the washer nozzle to the rear glass.
From the pressure (or volume) of the washer nozzle on the side
Is very high (or more) .

[Brief description of the drawings]

FIG. 1 is a partially cutaway side view showing an embodiment of a washer pump according to the present invention.

[Figure 2] in the washer pump shown in FIG. 1 a first
It is a horizontal cross-sectional view in pump chamber position.

FIG. 3 shows a second embodiment of the washer pump shown in FIG.
It is a horizontal cross-sectional view in pump chamber position.

[Explanation of symbols]

1 washer pump 2c c Ossha liquid discharge hole (first washer fluid ejection
Hole) 4c c Ossha liquid discharge hole (second wash fluid discharging
Hole) 5a washer fluid suction port 10 motor 13 armature shaft (motor shaft) 20 pump chamber (chamber first pump) 21 impeller (first Lee Npera for playback pump) 22 annular channel (first 1 of annular flow path) 22a 32a communicating portion 23 33 partition wall 30 pump chamber (second pump chamber) 31 impeller (second impeller for regenerative pump) 32 annular channel (second annular passage )

Claims (1)

(57) [Scope of request for utility model registration] 1. An automobile windshield and rear glass
A washer pump that supplies washer fluid to the
Te, a forward and reverse rotatable motor, on the motor shaft of the front SL motor unit, arranged parallel to each other
The first and the Lee Npera for the second regenerative pump, housing the first-in Pera, enclose the first-in Pera
A first pump chamber no first annular channel is formed, said second i Npera to yield capacity, enclose the second-in Pera
A second pump chamber which no second annular channel is formed, the first pump chamber first annular flow path and the second pump
A washer liquid suction hole communicating with a second annular flow path of the chamber, and a first washer liquid discharge communicating with the first pump chamber.
A second washer fluid discharge communicating with the hole and the second pump chamber
And a hole, the first washer fluid discharge hole by the forward rotation of the motor unit
Supply washer fluid to the windshield from
Second, the second rotation of the washer liquid by the reverse rotation of the motor section.
A washer for supplying a washer liquid to the rear glass from an outlet.
In the washer pump, the outer diameter of the first impeller is equal to the outer diameter of the second impeller.
The first annular space of the first pump chamber is formed with a larger diameter than the wall.
Communication between the washer liquid suction hole and the first washer liquid discharge hole.
A partition wall is provided on one side in the circumferential direction of the passage portion,
The second annular flow path of the second pump chamber is
Communicating between the washer liquid suction hole and the second washer liquid discharge hole
Washer pump, characterized that you partition wall on the other side in the circumferential direction is provided in the portion.