JP2515532Y2 - Car washer pump - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a washer pump for an automobile, and more particularly to a washer pump for an automobile in which a ventilation hole of a motor casing used in the washer pump for an automobile has a waterproof structure.

[0002]

2. Description of the Related Art Conventionally, in order to wash a window or headlamp of an automobile or the like, washing washer liquid is ejected from a washer pump by a washer pump from a washer nozzle to wash the window or headlamp. Has been performed, and, for example, a washer pump as shown in FIG. 10 has been proposed. That is, FIG.
The proposed technology indicated by 0 is a washer pump 10 including a motor casing 105 and a pump casing 108.
0, the motor casing 105 has an armature 101
Motor unit 1 in which brush 103 is pressed against commutator 102 of
04 is provided, and in the pump casing 108,
The armature 101 houses the impeller 107 that rotates in the pump chamber 106, and the motor casing 105
A ventilation hole 109 is provided between the pump casing 108 and the pump casing 108. The vent hole 109 is provided between the outer peripheral edge 111 of the pump wall 110 on the motor casing 105 side and the lower end side edge 112 of the tubular portion 105a of the motor casing 105 along the longitudinal direction of the tubular portion 105a and on the pump casing 108. The motor casing 105 so that the inside and the outside of the motor casing 105 communicate with each other in a labyrinth.
The inside and outside of the motor casing 105 are in communication with each other without water droplets or the like directly entering into the inside of 05. With this configuration, water drops and the like do not directly enter the inside of the motor casing to prevent mechanical problems, and the pressure inside and outside the motor casing is kept uniform.

[0003]

In the above conventional technique, the ventilation hole 109 is formed in the longitudinal direction of the cylindrical portion 105a, and the ventilation hole 109 is formed in the pump wall 11 on the motor casing 105 side.
Since the outer peripheral edge 111 of 0 has an opening in the lateral direction (left and right in FIG. 10), in order to obtain a sufficient waterproof effect,
As indicated by 0, the opening that communicates with the ventilation hole 109 must be used in a lateral direction, and there is a problem that the posture in a state where the device is installed in the vehicle must be limited. Further, particularly in the case of a washer pump used for a headlamp, there is a problem in that depending on a place where the washer pump is mounted on a vehicle, water is severely washed by a high-speed car wash, tires are raised, and sufficient waterproofness cannot be ensured.
As represented by the above-mentioned conventional technique, since the vent hole of the washer pump is formed between the motor casing and the pump casing, there is no degree of freedom in the formation position of the vent hole,
Since the mounted state is limited, a washer pump that is not limited to the mounted state has been desired.

The object of the present invention is to have a sufficient waterproofness in the ventilation hole regardless of the mounting state in the automobile, the mounting state such as the mounting location, etc., and the degree of freedom in the position of forming the ventilation hole is large, and the assembly is easy. To provide a simple washer pump for automobiles.

[0005]

A washer pump for an automobile according to the present invention comprises a motor casing for accommodating a rotor, and a pump casing for accommodating an impeller which is connected to a shaft of the rotor and rotates in a pump chamber. In a washer pump provided with a vent hole formed on a bottom surface of the motor casing on the pump casing side, the motor casing has a bottomed cylindrical body for accommodating a rotor, an engaging member for the pump casing, and It has a communication portion that communicates the cylindrical body and the engagement member, a partition wall portion that surrounds the ventilation hole and has an open surface on the outer side of the diameter, and a cover member disposition portion that is formed on the partition wall portion and the engagement member. A cover member is engaged with the cover member disposition portion, and the cover member has an external ventilation hole to cover the open surface of the partition wall with a gap and to separate the cover. And said formed by partitioning protrusions formed to surround the outer vent structure below the.

When the opening is formed on the partition wall side of the communicating portion, it is preferable to form a waterproof wall surrounding the opening of the communicating portion at the lower portion of the partition wall.

[0007]

In the present invention, the motor casing encloses the bottomed cylindrical body for accommodating the rotor, the engaging member for the pump casing, the communicating portion for communicating the cylindrical body and the engaging member, and the vent hole. A partition member having a radially outer surface as an open surface and a cover member disposing portion formed on the partition member and the engaging member, wherein the cover member is engaged with the cover member disposing portion. Since the cover member is provided with an external ventilation hole and covers the open surface of the partition wall with a gap, and a partition protrusion is formed below the partition wall to surround the external ventilation hole.
A plurality of passages are formed in a three-dimensional labyrinth between the ventilation hole formed in the cylindrical body forming the motor casing and the external ventilation hole formed in the cover member. Regardless of this, it is possible to prevent water from entering through the external ventilation holes and reaching the ventilation holes formed in the cylindrical body of the motor casing, and prevent water droplets and the like from directly entering the inside of the motor casing. It is possible to prevent the physical trouble and to uniformly maintain the pressure inside and outside the motor casing. In this way, the ventilation hole has sufficient waterproofness regardless of the mounting state of the vehicle, the mounting state such as the mounting location, and the like. Further, a plurality of three-dimensional maze-like passages are formed separately from the pump casing between the vent hole formed in the cylindrical body forming the motor casing and the external vent hole formed in the cover member, Moreover, since the cover member is configured to be easily engaged with the cover member disposition portion, the degree of freedom of the position where the vent hole is formed in the motor casing can be increased and the assembling is easy.

If a waterproof wall surrounding the opening exposing the shaft is formed at the lower part of the partition wall and exposes the shaft, water can be leaked to the outside in the case where there is a leak from the pump chamber in the through part which constitutes the communication part. It can be suitably used for a washer pump having an opening for escape.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. The members, arrangements, and the like described below are not intended to limit the present invention and can be variously modified within the scope of the present invention.

The automobile washer pump according to this example is
As shown in FIG. 1, a motor unit M and a pump unit P are main components, and the motor unit M drives the pump unit P to eject the washer liquid from a washer tank (not shown) from a washer nozzle. Is. The motor unit M houses the rotor 2 and the stator 3, a commutator and a brush (not shown) in the motor casing 10, and the pump unit P is connected to the shaft 4 of the rotor 2 in the pump casing 30 and is connected to the pump chamber. An impeller 32 that rotates within 31 is accommodated.

As shown in FIGS. 2 to 4, the motor casing 10 of this embodiment has a bottomed cylindrical body portion 11 having an opening 11a at the top, a plate portion 12, a bottomed cylindrical body portion 11 and a plate portion. It is composed of a communicating portion 13 with 12; a cover member disposing portion 14 formed between the bottomed tubular body portion 11 and the plate portion 12; and a cover member 15.

On the top of the bottomed cylinder 11, a connector 17 is arranged together with the lid 16, and the bottom 1 of the bottomed cylinder 11 is disposed.
At the center of 1b, the bearing arrangement portion 13 that constitutes the communication portion 13 is formed.
a is formed. Ventilation holes 11d (two in this example) are formed in the bottom surface 11b of the inner wall 11c of the cylindrical body 11 at a slight distance. A partition wall portion 18 that covers the ventilation hole 11d is formed below the ventilation hole 11d. As shown in FIGS. 2 and 4, the partition wall portion 18 of the present example is formed in a hollow box shape from both side surfaces 18b, 18b, the bottom surface 18c, and the communication portion 13 with the connecting portion 19 interposed therebetween, and the outer peripheral side is opened. It is the surface 18a. The partition 18 and the ventilation hole 11d communicate with each other. Further, locking protrusions 21 are formed on the outer sides of both side surfaces 18b, 18b of the partition wall portion 18 so as to project outward from the partition wall portion 18. This locking projection 21
As shown in FIG. 5, the locking portion 21a is an extension surface of a substantially right angle, and slope portions 21b are formed from both sides of the partition wall 18 with respect to the extension surface.

The plate portion 12 constitutes a connecting portion which is connected to a pump casing 30 which will be described later, and is provided with a connecting protrusion 12a on its outer periphery, and a concave portion forming a communicating portion 13 in the central portion. 13b is formed, and the recess 13b is provided with the sealing material 36 as shown in FIG.
Further, it engages with a central protrusion of the pump casing 30 described later. Then, the bottomed cylindrical body 11 and the plate portion 12 are
The plate portion 12 and the cylindrical body 1 are connected by the connecting portion 19.
1 is strongly reinforced so as not to be damaged. Further, as shown in FIG. 6, two guide portions 22, 22 are provided on the upper surface of the plate portion 12, that is, at a position aligned with the locking projection 21 formed on the partition wall portion 18 on the cylindrical body 11 side. A locking protrusion 23 is formed on the outer side of the guide portion 22. Similar to the locking projection 21, the locking projection 23 also has a locking portion 23a as an extension surface of a substantially right angle, and the guide portion 22 is provided with respect to this extension surface.
Slopes 23b are formed from both sides of the.

The communicating portion 13 of this example is shown in FIGS. 1, 3 and 4.
As shown by, it is formed of a bearing arrangement portion 13a, a concave portion 13b, and a penetrating portion 13c. The bearing arrangement portion 13a is
The bearing 5 of the shaft 4 is arranged, and the bearing arrangement portion 13a and the penetrating portion 13c are connected. The penetrating portion 13c is an axial hole in the axial direction, and the plate portion 12
Communicates with the concave portion 13b. The cover member disposing portion 14 of the present example is an outer peripheral portion of the communicating portion 13 and is the partition wall portion 18
And the cover member 15 is attached to the cover member disposing portion 14.

As shown in FIGS. 2, 7 and 8, the cover member 15 of the present example is formed in a generally U-shape in a top view,
Left and right surfaces 15a, 15a, upper and lower surfaces 15b and front surface 15c
A seal surface is formed on each of the left and right surfaces 15a and 15a.
At both free ends of a, a locking projection 21 formed on the partition wall portion 18 and a locking projection 23 formed on the outside of the guide portion 22.
Engaging portions 15e, 15e formed of hook-shaped concave portions that engage with are formed. Further, the cover member 15 includes the partition protrusion 15
f, a cutout portion 15g that comes into contact with the connecting portion 19, and an external ventilation hole 15h. That is, the width X of the cover member 15 is formed to be slightly larger than the width Y of the partition wall portion 18, and a partitioning projection 15f extending toward the center of the motor casing 11 at the time of mounting is formed in the center. The partition protrusion 15f is divided at the central portion and the partition wall portion 18
It is formed in an L-shaped cross section from the lower surface of the inside of the guide portion 22, and the connecting portion 19, the guide portion 22, and the plate portion 12 form a passage. The notch 15g is formed between the divided partition projections 15f.
An external vent hole 15h is formed in the lower part of the. Reference numeral 15d is a guide that engages with the connecting portion 19.

The pump casing 30 of this embodiment accommodates a pump chamber 31 and an impeller 32 which is connected to the shaft 4 of the rotor 2 and rotated in the pump chamber 31, as shown in FIG. As shown, a central protrusion is formed in the upper center of the impeller 32 in the pump casing 30, and an engaging hole portion 32a that engages with the tip of the shaft 4 is formed in the central protrusion. There is. The shaft 4 and the engagement hole 32a are connected to each other, and the impeller 3
2 is designed to rotate. In this example, the inlet portion 33 and the outlet portion 34 are formed integrally with the pump casing 30.

The cover member 15 is attached to the motor casing 10 having the above-described structure as follows. That is, as shown in FIG. 3, when the cover member 15 is pushed toward the cover member disposing portion 14 from the partition projection 15 f side, the engaging portions 15 e and 15 e of the cover member 15 and the partition wall portion 18 are formed. The locking projection 21 and the locking projection 23 formed on the outer side of the guide portion 22 engage with each other. At this time, the notch portion 15g of the cover member 15 and the partition wall portion 18
The connecting portion 19 formed on the contact portion abuts on the cover member 15 and prevents the cover member 15 from being excessively pushed. Then, at this time, it is snap-fitted so that it is easy to see that it has been set.

By mounting the cover member 15, the open surface 18a of the partition wall portion 18 is covered by the upper surface 15b of the cover member 15 and the front surface 15c with a slight gap, and the cover member 15 is further covered. The formed external ventilation hole 15h corresponds to the partition portion 15f of the cover member 15.
The connection portion 19, the guide portion 22, and the plate portion 12 cover the communication portion 13 with a slight gap. The gap between the communicating portion 13 and the partition portion 15f
And a lower surface 18c of the partition wall portion 18 are communicated with each other.

As described above, the ventilation hole 11d formed in the cylindrical body 11 of the motor housing 10 has its passage bent by the partition wall portion 18 and the cover member 15, and the partition wall portion 1
The lower surface 18c of FIG. 8, the upper surface of the plate portion 12, and the connecting portion 13 and the partition portion 15f of the cover member 15 are bent into a gap closer to the communication portion 13, and the gap closer to the communication portion 13 is the cover member 15 and the connecting portion. 13, the guide portion 22, and the plate portion 12 communicate with the external ventilation hole 15h. In this example, the ventilation hole 1 of the motor housing 10 is connected.
1d communicates with the outside through three passages.
Therefore, no matter what state the washer pump is arranged in, water and the like will not enter through the vent holes of the motor casing, and the water can be waterproofed.

FIG. 9 shows another embodiment of the present invention. In this embodiment, the shaft 4 is attached to the through portion 13c of the communicating portion 13.
The opening 34 is formed so as to be exposed, and the opening 34 makes it possible to easily drain water when the sealing material 36 of the shaft 4 becomes abnormal and water enters from the pump chamber. ing. In this example, the opening 34
The waterproof wall 35 is attached to the lower part of the partition wall 18 so as to cover the. By attaching the waterproof wall 35 to such a seal portion, it can be suitably applied to a washer pump having an opening in the communication portion.

[0021]

According to the present invention, a plurality of passages are formed in a three-dimensional labyrinth between the ventilation holes formed in the cylindrical body forming the motor casing and the external ventilation holes formed in the cover member. Therefore, regardless of how the washer pump is attached, water is prevented from entering through the external ventilation holes and reaching the ventilation holes formed in the cylinder of the motor casing. It is possible to prevent mechanical invasion by preventing intrusion of the like and to uniformly maintain the pressure inside and outside the motor casing. A plurality of three-dimensional labyrinth-like passages are formed separately from the pump casing between the ventilation hole formed in the cylindrical body forming the motor casing and the external ventilation hole formed in the cover member. Moreover, since the cover member is configured to be easily engaged with the cover member disposition portion, the degree of freedom of the position where the vent hole is formed in the motor casing can be increased and the assembling is easy.

[Brief description of drawings]

FIG. 1 is a partially cutaway front view of a washer pump according to the present invention.

FIG. 2 is a structural perspective view showing a state before the cover member is assembled to the motor casing of the washer pump according to the present invention.

FIG. 3 is a sectional view of an essential part showing a state in which a cover member is assembled to the motor casing of the washer pump according to the present invention.

FIG. 4 is a partially cutaway front view of the motor casing of the washer pump according to the present invention.

5 is a cross-sectional view taken along the line AA of FIG.

FIG. 6 is a sectional view taken along line BB of FIG. 4;

FIG. 7 is a top view of a cover member.

8 is a sectional view taken along line CC of FIG.

FIG. 9 is a front view similar to FIG. 4, showing another example of the present invention.

FIG. 10 is a partially cutaway front view of a washer pump showing a conventional example.

[Explanation of symbols]

 2 rotor 4 shaft 10 motor casing 11 bottomed cylindrical body 11d ventilation hole 12 engaging member (plate portion) 13 communicating portion 14 cover member disposing portion 15 cover member 15e engaging portion 15f partitioning protrusion 15h external ventilation hole 18a open surface 18 Partition wall 21 Locking projection 22 Guide part 23 Locking projection 30 Pump casing 31 Pump chamber 32 Impeller 34 Opening 35 Waterproof wall

Claims (2)

(57) [Scope of utility model registration request] 1. A motor casing for accommodating a rotor,
In a washer pump including a pump casing that accommodates an impeller that is connected to the rotor shaft and rotates in a pump chamber, and a vent hole formed on a bottom surface of the motor casing on the pump casing side, the motor casing includes: A bottomed cylindrical body that accommodates the rotor, an engagement member that engages with the pump casing, a communication portion that communicates the cylindrical body and the engagement member, and a partition wall portion that surrounds the ventilation hole and has an outer surface open to the outside in diameter. And a cover member disposing portion formed on the partition wall portion and the engaging member, wherein the cover member is engaged with the cover member disposing portion, and the cover member has an external vent hole. A washer pump for an automobile, comprising a partitioning projection that covers the open surface of the partition wall with a gap and surrounds the external ventilation hole on the lower side of the partition wall. 2. An opening is formed on the partition wall side of the communication section, and a waterproof wall surrounding the opening of the communication section is formed below the partition wall section. The washer pump for automobile according to 1.