JPH0594037U - Washer pump - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a washer pump capable of switching and feeding the washer liquid in two directions. [Arrangement] Armature shaft 1 of motor unit 10 capable of normal and reverse rotation
Fix the two regeneration pump impellers 21 and 31 to 1,
Both impellers 21 and 31 are individually housed in the two pump chambers 20 and 30. The washer fluid suction holes 5a are respectively communicated with the circular flow passages 22, 32 of the two pump chambers 20, 30, and the flow passages 22 of the first pump chamber 20 are communicated with the washer fluid suction holes 5a at a portion 22a. The first washer liquid discharge hole 2c communicates with the washer liquid discharge hole 2c via the partition wall 23, and the flow passage 32 of the second pump chamber 30 has a partition wall 32a on the counterclockwise side of the communicating portion 32a with the washer liquid suction hole 5a. Second through 33
The washer liquid discharge hole 4c is communicated.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a washer pump used to feed the washer liquid in the washer tank to the washer nozzle side.

[0002]

[Prior Art]

 Conventionally, the above-mentioned 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 protruding from the motor chamber into the pump chamber. Connect the washer fluid suction hole that communicates with the inside to the washer tank, and connect the washer fluid discharge hole that also communicates with the inside of the pump chamber to the washer nozzle via a tube, and operate the washer fluid in the washer tank. It feeds to the washer nozzle side with high pressure.

[0003]

[Problems to be solved by the device]

 However, in the conventional washer pump, as is apparent from the above description, for example, when the washer liquid is supplied by providing the washer nozzle not only on the windshield side of the automobile but also on the rear glass side. Has a separate washer pump for the rear glass, which is unfavorable for reducing vehicle weight and cost, and it is a conventional problem to solve this problem. there were.

[0004]

[The purpose of the device]

 The present invention has been made by paying attention to the above-mentioned conventional problems. The washer fluid is switched in two directions by the switching operation of one washer pump without using two washer pumps separately. The purpose is to provide a washer pump that is capable of

[0005]

Means for Solving the Problems A washer pump according to the present invention comprises a motor part capable of normal / reverse rotation, and two regenerative pump impellers fixed to a motor shaft of the motor part and parallel to each other. , Two pump chambers individually accommodating the two regenerative pump impellers and having an annular flow passage, and a washer liquid suction hole communicating with each of the annular flow passages of the two pump chambers The first washer liquid discharge hole is connected to the annular flow path of the first pump chamber of the two pump chambers through a partition wall on one side in the circumferential direction of the communication portion with the washer liquid suction hole. In addition, in the annular flow path of the second pump chamber of the two pump chambers, the second washer is provided on the other side in the circumferential direction of the communicating portion with the washer liquid suction hole via the partition wall. Structure that connects the liquid discharge holes And to have been characterized by a, and a means for resolve the conventional problems described above the configuration of such a washer pump.

As one embodiment, the diameters of the two regenerative pump impellers are different from each other.

[0007]

[Function of the device]

 In the washer pump according to the present invention, when the motor shaft is rotated so that the two impellers for the regeneration pump rotate toward one side in the circumferential direction of the annular flow passage, the annular pump is formed in the first pump chamber. Since only a slight negative pressure is applied to the communication part of the flow passage with the washer liquid suction hole by the partition wall provided on one side of this communication part, the washer liquid is hardly sucked into the first pump chamber, 1 No washer liquid is discharged from the washer liquid discharge hole. Further, in the second pump chamber, a high negative pressure is generated in the communicating portion of the annular flow passage with the washer liquid suction hole, so that the washer liquid is sucked into the second pump chamber through the washer liquid suction hole, The washer liquid is discharged from the washer liquid discharge hole with high pressure.

On the contrary, when the motor shaft is rotated so that the two regenerative pump impellers rotate toward the other side in the circumferential direction of the annular flow passage, in the second pump chamber, At the part communicating with the washer liquid suction hole, the partition wall provided on the other side of this communicating part creates a slight negative pressure, so almost no washer liquid is sucked into the second pump chamber, and therefore the second washer liquid discharge The washer liquid will not be discharged from the hole. Further, in the first pump chamber, since a high negative pressure is generated in the communicating portion of the annular flow path with the washer liquid suction hole, the washer liquid is sucked into the first pump chamber through the washer liquid suction hole, High-pressure washer liquid is discharged from the first washer liquid discharge hole.

[0009]

【Example】

 The invention will be described below with reference to the drawings.

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

The washer pump 1 shown in the figure has a case 2 having a substantially cylindrical shape. An end cover 3 is attached to the upper end of the case 2 in FIG. 1 and a partition wall 2a is attached to the lower end of FIG. It is provided as one.

In this case, a portion between the end cover 3 and the partition wall 2a of the case 2 is formed as a motor unit 10, and the magnet 11 fixed to the inner peripheral surface of the case 2 can be rotated normally and reversely. The armature shaft (motor shaft) 13 of the armature 12 provided has its upper end supported by a bearing (not shown) mounted on the end cover 3, and its lower end supported by a bearing 14 provided in the center of the partition wall 2a. ing.

In the washer pump 1, the intermediate cover 4 and the lower cover 5 are sequentially attached to the lower end of the case 2 so that the space between the partition wall 2a and the intermediate cover 4 of the case 2 and the intermediate cover 4 and the lower side of the case 2 can be reduced. The pump chambers 20 and 30 are formed at two positions between the cover 5 and the cover 5.

A lower end portion of the armature shaft 13 projects into the pump chambers 20 and 30 through a packing 15 attached to the center of the partition wall 2a of the case 2, and the first pump on the upper side of FIG. An impeller 21 for a regenerative pump fixed to the armature shaft 13 is accommodated in the chamber 20, and is also fixed to the armature shaft 13 in the second pump chamber 30 on the lower side of FIG. In the embodiment, an impeller 31 for a regeneration pump having a smaller diameter than the impeller 21 is accommodated.

Further, the first and second pump chambers 20 and 30 respectively have annular flow passages 22 and 32 along the peripheral groove portions 21 a and 31 a of the impellers 21 and 31 housed therein, respectively. On the left side of the drawing, washer liquid suction holes 5a provided in the lower cover 5 are connected to the annular flow paths 22 and 32 through the case side suction holes 2b and the intermediate cover side suction holes 4b, respectively.

As shown in FIG. 2, the first pump chamber 20 is provided with a partition wall 23 that blocks the annular flow passage 22. 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 the armature is further located on the clockwise side in FIG. A first washer liquid discharge hole 2c provided in the case 2 extending in the radial direction of the shaft 13 (obliquely upward to the left in FIG. 2) is communicated.

On the other hand, also in the second pump chamber 30, as shown in FIG. 3, a partition wall 33 that blocks the annular flow passage 32 is provided (shown by a virtual line in FIG. 1). The partition wall 33 is provided adjacent to the communication portion 32a between the annular flow passage 32 and the intermediate cover side suction hole 4b on the counterclockwise side in FIG. 3, and further on the counterclockwise side in FIG. A second washer liquid discharge hole 4c provided in the case 2 extending in the radial direction of the armature shaft 13 (downward in the left direction in FIG. 3) is communicated with the case 2.

In the washer pump 1, the washer liquid suction hole 5a of the lower cover 5 is connected to a washer tank (not shown), and the first washer liquid discharge hole 2c and the second washer liquid discharge hole 4c are provided. They are connected to the windshield washer nozzle and the rear glass washer nozzle that are not shown.

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

In the washer pump 1 having the above-described configuration, the power source for rotating the armature shaft 13 of the motor unit 10 in the counterclockwise direction in FIGS. 2 and 3 by turning on the windshield side switch (not shown) is the connector unit 3a. When it is supplied through the terminal of, the impeller 21 in the first pump chamber 20 and the impeller 31 in the second pump chamber 30 each rotate counterclockwise as the armature shaft 13 rotates.

At this time, as shown in FIG. 2, since a high negative pressure is generated in the communicating portion 22a between the annular flow path 22 of the first pump chamber 20 and the case-side suction hole 2b, a high negative pressure is generated in the first pump chamber 20. The washer liquid in the washer tank is sucked through the washer liquid suction hole 5a and the case side suction hole 2b, and the washer liquid becomes a spiral flow of high pressure by the rotation of the impeller 21 and is discharged from the first washer liquid discharge hole 2c. As a result, the washer liquid will be ejected from the washer nozzle on the windshield side.

Further, as shown in FIG. 3, in the communication portion 32a between the annular flow path 32 of the second pump chamber 30 and the cover side suction hole 4b, the partition wall provided on the counterclockwise side of the communication portion 32a. Since only a slight negative pressure is generated by 33, the washer liquid is hardly sucked into the second pump chamber 30. Therefore, since the washer liquid is not discharged from the second washer discharge hole 4c, the washer nozzle on the rear glass side. The washer fluid does not squirt from.

On the other hand, when power for rotating the armature shaft 13 of the motor unit 10 in the clockwise direction of FIGS. 2 and 3 is supplied by turning on the rear glass side switch (not shown), the armature shaft 13 rotates together with the rotation of the armature shaft 13. The impeller 21 in the first pump chamber 20 and the impeller 31 in the second pump chamber 30 each rotate clockwise.

At this time, as shown in FIG. 2, in the communication portion 22a between the annular flow path 22 of the first pump chamber 20 and the case-side suction hole 2b, a partition provided on the clockwise side of the communication portion 22a is provided. Since only a slight negative pressure is generated by the wall 23, the washer liquid is hardly sucked into the first pump chamber 20, and the washer liquid does not spout from the washer nozzle on the windshield side.

Further, as shown in FIG. 3, a high negative pressure is generated in the communication portion 32a between the annular flow passage 32 of the second pump chamber 30 and the cover side suction hole 4b, so that the second pump chamber 30 has a negative pressure. The washer liquid in the washer is sucked through the washer liquid suction hole 5a and the cover side suction hole 4b, and this washer liquid is discharged at a high pressure from the second washer liquid discharge hole 4c. The washer liquid will be ejected.

In the above-described embodiment, the diameter of the impeller 21 in the first pump chamber 20 is set to be larger than the diameter of the impeller 31 in the second pump chamber 30, so that the efficiency of the motor unit 10 is kept to the best. As it is, it has an effect that the ejection pressure (or ejection amount) of the washer nozzle on the windshield side can be made higher (or larger) than the ejection pressure (or ejection amount) of the washer nozzle on the rear glass side.

The detailed structure of the washer pump according to the present invention is not limited to the above-mentioned embodiment, and it is naturally possible that the two impellers have the same diameter. In addition, the discharge directions of the washer liquid suction hole 5a and the washer liquid discharge holes 2c and 4c can be appropriately changed according to the installation condition of the washer pump.

[0028]

[Effect of the device]

 As described above, since the washer pump according to the present invention has the above-described configuration, the two-way direction is obtained through the first washer liquid discharge hole and the second washer liquid discharge hole by switching the rotation direction of the motor shaft. It is now possible to switch the washer fluid to the vehicle, and even if a washer nozzle is provided not only on the windshield side of the automobile but also on the rear glass side, the washer fluid can be fed. Since it is not necessary to provide two of them, it has an extremely excellent effect that it can contribute to both reduction of the weight of the vehicle body and reduction of the cost.

[Brief description of drawings]

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

2 is a horizontal cross-sectional explanatory view of the washer pump shown in FIG. 1 at a position of a first pump chamber.

FIG. 3 is a horizontal cross-sectional explanatory view of the washer pump shown in FIG. 1 at a position of a second pump chamber.

[Explanation of symbols]

 1 Washer Pump 2c First Washer Liquid Discharge Hole 4c Second Washer Liquid Discharge Hole 5a Washer Liquid Suction Hole 10 Motor Part 13 Armature Shaft (Motor Shaft) 20 First Pump Chamber 21 31 Regenerative Pump Impeller 22 32 Circular Flow Path 22a 32a communication part 23 33 partition wall 30 second pump chamber

Claims (2)

[Scope of utility model registration request] 1. A forward / reverse rotatable motor part, two regenerative pump impellers fixed to a motor shaft of the motor part and parallel to each other, and the two regenerative pump impellers individually. Two pump chambers that house and have an annular flow passage, and a washer liquid suction hole that communicates with each of the annular flow passages of the two pump chambers are provided, and a first pump chamber of the two pump chambers is provided. The annular flow passage communicates with the first washer liquid discharge hole via a partition wall on one side in the circumferential direction in the communicating portion with the washer liquid suction hole, and also the second pump of the two pump chambers. A washer pump characterized in that a second washer liquid discharge hole is communicated with the annular flow path of the chamber to the other side in the circumferential direction of a portion communicating with the washer liquid suction hole via a partition wall. 2. The washer pump according to claim 1, wherein the two regenerative pump impellers have different diameters.