JP3323451B2 - Washer pump and washer device for vehicle - 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 in which a motor having a flat cross section is housed in a housing as a drive source and a washer device for a vehicle.

[0002]

2. Description of the Related Art FIG.
The washer device 51 shown in FIG. The washer device 51 includes a washer pump 52 and a tank 53. This washer pump 5
Reference numeral 2 denotes a state in which a part of the housing 54 is inserted and fixed in the tank 53, and the cleaning liquid is sucked through an impeller 56 from a suction hole 55 formed in an end surface of the inserted housing 54. The cleaning liquid is discharged from an outlet (not shown) formed in the housing 54. The washer pump 52 is generally mounted laterally with respect to the tank 53 or vertically with the suction hole 55 side up.

[0003] The motor 57 is accommodated in a motor chamber 58 defined in the housing 54 and is electrically connected to a terminal 59 extending to the outside. The impeller 56 is connected to a rotation shaft 60 of a motor 57 and is disposed in a pump chamber 61 defined in the housing 54 on the suction hole 55 side. The cleaning liquid in the tank 53 is sent from the pump chamber 61 to the outlet through the flow path 62 by the rotation of the impeller 56 driven by the motor 57. The seal part 63 is interposed between the housing 54 and the rotating shaft 60, and the cleaning liquid in the pump chamber 61
8 is prevented from entering.

[0004] The air in the motor chamber 58 is
The expansion and contraction are repeated due to the heat generated by the N-OFF operation. That is, when the motor 57 is turned on, the motor 57 generates heat, and the motor 57 is turned off.
By doing so, the temperature of the motor 57 decreases. As the temperature of the motor 57 rises and falls, the air in the motor chamber 58 expands and contracts.

However, in the above-mentioned conventional washer pump 52, the motor chamber 58 and the outside of the housing 54 are sealed. For this reason, when the air in the motor chamber 58 contracts, the liquid in the pump chamber 61 may enter the motor chamber 58 from the seal portion 63, and the motor 57 may be flooded, causing an abnormal operation. In addition, since the liquid that has once entered the motor chamber 58 is not discharged to the outside, the liquid that has entered remains in the motor chamber 58, and the abnormality of the motor 57 cannot be avoided. Further, water droplets generated by condensation in the motor chamber 58 cannot be discharged to the outside.

In order to avoid the above-mentioned problem, it is sufficient to provide an air passage for communicating the motor chamber 58 with the outside. Thus, Japanese Utility Model Laid-Open Publication No. 2-49657 discloses a washer pump 66 having a ventilation hole 65 for communicating a motor chamber 64 with the outside, as shown in FIG. In this washer pump 66, the vent hole 65 is formed in an L-shape. Therefore, even if water is received from the outside, the L-shaped vent hole 65 prevents water from entering the motor chamber 64.

[0007]

However, although the vent hole 65 is formed in an L-shape, when it is subjected to strong water, the water bounces off the wall inside the vent hole 65, and the motor chamber 64 There was a risk that water would enter the interior. In particular, in the washer pump 51 shown in FIG. 7, even if the L-shaped vent hole is provided, when the washer pump 52 receives strong water from the outside, water enters through the vent hole and the motor May be wet.

Further, in the washer pump 66 shown in FIG. 8, even if water reaches the motor chamber 64 from the vent hole 65, there is a possibility that water will flow to the motor disposed above the vent hole 65 and the motor will get wet. Not at all. However, since the washer pump 52 shown in FIG. 7 is assembled horizontally to the tank 53 so that the axial direction of the housing 54 is horizontal, even if the L-shaped ventilation hole is provided, the washer pump 52 is When receiving strong water, there is a possibility that the water that has bounced off the wall in the vent hole reaches the motor chamber, and the water flows to the motor to wet the motor. In particular, since the washer pump 52 is attached to a lower portion of the tank 53, it is easily received by water.

In the case of the type in which the housing 54 is inserted into and fixed to the tank 53, a ventilation hole must be provided on the side of the housing 54 opposite to the side where the housing 57 is inserted into the tank 53 with the motor 57 interposed therebetween. However, when the cleaning liquid leaked from the seal portion 63 flows out to the outside through the motor chamber 58, the cleaning liquid can permeate into the motor 57 because the motor 57 is located on the outflow path to the vent hole. There is
It adheres between the core of the motor 57 and the magnet, causing rust, and the rust may cause the motor 57 to malfunction.

The present invention has been made in view of the above problems, and a first object of the present invention is to provide a washer pump having a motor having a flat cross section as a driving source in a washer pump for communicating a motor chamber with the outside. An object of the present invention is to provide a washer pump and a washer device that can reliably prevent water from entering a motor chamber from a road and can be made compact. A second object is to achieve the first object and to discharge a liquid leaking from a seal portion and entering a motor chamber to the outside without wetting the motor.

[0011]

[SUMMARY OF] To achieve the pre-Symbol purpose in the invention according to claim 1, in washer pump motor is housed in the cross-sectional flat shape to the motor chamber of the inner housing, the motor to the housing An air passage communicating between the chamber and the outside of the housing is provided so that at least a part of the air passage passes through a flattened portion of the housing opposed to the flat portion of the motor, and the path of the air passage is sequentially reduced. > The three parts are bent in three directions to form the motor chamber.
A drainage passage is provided on the inner peripheral surface of the housing, and the drainage passage is provided.
The gist is that the path is communicated with the ventilation path . Note that the flattened omission portion indicates a portion (region) where no motor exists within the maximum outer diameter range of the motor.

According to a second aspect of the present invention, in the first aspect of the present invention, the ventilation path includes an axial direction path formed to extend along an axial direction of the housing, and a peripheral direction of the housing. The gist of the present invention consists of a circumferential direction path formed so as to extend in the direction and a radial direction path formed to extend in the radial direction of the housing.

According to a third aspect of the present invention, in the second aspect of the present invention, in the ventilation path, at least the axial direction path extending in the axial direction of the housing is formed so as to pass through the flattened portion. The gist is that

[0014] In the invention according to claim 4 for achieving a pre-Symbol purpose, in the invention described in any one of claims 1 to claim 3, wherein the drain passage is than the air passage
It is summarized as being provided al positioned above.

[0015] According to the fifth aspect of the present invention, there is provided the first to third aspects of the present invention.
In the invention according to claim 4, the drain passage is formed so as to extend in an axial direction between a plurality of convex portions provided on an inner peripheral surface of the housing to hold the motor. It is a gist that the groove is formed.

According to the sixth aspect of the present invention, there are provided the first to third aspects of the present invention.
In the invention described in any one of claims 5 to 9, the gist is that the drain passage is a groove formed in the flat omission portion of the housing so as to extend in the axial direction.

According to a seventh aspect of the present invention, a vehicle washer device includes the washer pump according to any one of the first to sixth aspects and a tank.

(Operation) According to the first aspect of the present invention, since the ventilation path connecting the motor chamber and the outside takes a path bent in at least three directions, the washer pump receives strong water. Even so, water is prevented from entering the motor chamber. A motor having a flat cross section is used as a drive source, and the air passage is provided in the flat omission portion of the housing using the flat omission portion so that at least a part of the air passage passes therethrough, so that it is bent in at least three directions. Even if a complicated path is provided, the washer pump becomes compact. Also, even if the motor is housed from the seal part
Liquid enters the inside of the housing (ie, the motor room)
Even if you do, the liquid will be guided through the drainage passage to the ventilation passage
Since the motor is drained to the outside, the motor
And disappear.

According to the second aspect of the present invention, the first aspect is provided.
In addition to the operation of the invention described in the above, the ventilation path becomes three-dimensional by the circumferential direction path, the axial direction path, and the radial direction path, and when water is received from the outside, water enters the motor chamber. Can be more reliably prevented.

According to the invention of claim 3, according to claim 2,
In addition to the effects of the invention described in (1), at least the axial direction path is formed so as to pass through the flattened portion, so that the path of the ventilation path can be lengthened.

According to the invention of claim 4, according to claim 1,
In addition to the effect of the invention according to any one of claims 3 to 3, the liquid transmitted through the drainage passage is guided to the ventilation passage without obstacle.
Is discharged outside .

According to the fifth aspect of the present invention, the first aspect is provided.
In addition to the effect of the invention described in any one of the fourth to fourth aspects, the liquid that has entered from the seal portion flows along the groove between the convex portions holding the motor provided on the inner peripheral surface of the housing. .

According to the invention described in claim 6, according to claim 1,
In addition to the effect of the invention described in any one of the above-described claims, the liquid that has entered from the seal portion flows along the groove formed in the flattened portion of the housing.

According to a seventh aspect of the present invention, a vehicle washer device includes the washer pump and the tank according to any one of the first to sixth aspects. The same operation as the operation of the washer pump according to any one of claims to 6 is obtained.

[0025]

DESCRIPTION OF THE PREFERRED EMBODIMENTS (First Embodiment) FIG. 1 shows a first embodiment in which the present invention is embodied in a vehicle washer device.
4 will be described with reference to FIG. FIG. 4 is a schematic side view of the washer device.

As shown in FIG. 4, the washer device 1 according to the present embodiment includes a washer pump 2 and a tank 3. The tank 3 is provided with a water replenishing hole 4 at an upper portion, and stores a cleaning liquid therein. The washer pump 2 is fitted to a lower portion of the undercut shape. The washer pump 2 is fitted to the opening 5 of the tank 3 through a grommet 6 so that a part of the main body is exposed to the outside. It is sent to the nozzle.

FIG. 1 is a side sectional view of the washer pump, FIG. 2 is a sectional view of the washer pump taken along line II-II in FIG. 1, and FIG. 3 is a sectional view of the washer pump taken along line III-III in FIG. FIG.

As shown in FIG. 1, the washer pump 2
Is constituted by a housing 8 made of fiber reinforced resin and having a substantially cylindrical shape as a whole. The housing 8 includes a body 9, a lid 10, and a pump casing 11. The pump casing 11 is fitted to the base end side (the left side in FIG. 1) of the body 9, and the front end side (the right side in FIG. 1). Lid 10
Are fitted. The motor 12 is housed in a motor chamber 13 defined in the housing 8, and an output shaft 14 protrudes toward the pump casing 11. The pump casing 11 has a suction hole 15 on the side (left side in FIG. 1) inserted into the tank 3. Then, the cleaning liquid in the tank 3 is sucked through the suction hole 15.

The pump chamber 16 is formed by a space surrounded by the body 9 and the pump casing 11 and communicates with the discharge port 7 (shown in FIGS. 2 and 4) via a flow path 17. The impeller 18 is housed in the pump chamber 16 while being connected to the output shaft 14, and is rotated by the drive of the motor 12. The seal portion 19 is interposed between the body 9 and the output shaft 14 to prevent the cleaning liquid in the pump chamber 16 from entering the motor chamber 13.
The terminal 20 is provided on the lid 10 so as to protrude outward, and is electrically connected to the motor 12.

The motor 12 is formed as a separate component from the housing 8, and as shown in FIGS. 2 and 3, the cross section is flat, that is, two opposite surfaces of the motor 12 are formed as a pair of flat portions 21. The remaining two opposing surfaces are formed as a pair of arc portions 22. The motor chamber 13 is formed to have a flat cross section in accordance with the cross sectional shape of the motor 12, and the body 9 of the cylindrical housing 8 is provided with the motor 1.
A pair of upper and lower thick portions 23 at portions opposed to the flat portion 21
Are formed. That is, the thick portion 23 is
2 are formed in the flattened part. Note that the flattened omission portion indicates a portion (region) where the motor 12 does not exist within the maximum outer diameter range of the motor 12.

As shown in FIG. 1 and FIG.
The motor chamber 1 is located at the lower part on the tip side (right side in FIG.
Ventilation path (vent) communicating between 3 and the outside of housing 8
24 are formed. The ventilation path 24 includes a communication chamber 25, an internal communication part 26, and an external communication part 27, and is located at the lowermost end (lowest point) of the housing 8 when the housing 8 is assembled to the tank 3. Pipe 28
Is provided so as to protrude in a circular shape, and has a vent hole 28a opened to the outside.

The communication chamber 25 is formed in a portion of the thick portion 23 adjacent to the flow path 17 in the axial direction so as to be partitioned from the flow path 17, and extends along the axial direction of the housing 8. The internal communication portion 26 is formed as a pair extending from one end (the right side in FIG. 1) of the communication chamber 25 to both sides in the circumferential direction of the housing 8 along the circumferential direction, and communicates the motor chamber 13 with the communication chamber 25. are doing. The external communication portion 27 is formed so as to extend along the radial direction of the housing 8.
The lower surface (left end in FIG. 1) of the communication chamber 25 on the opposite end (left end in FIG. 1) communicates with the communication chamber 25 at the lower surface, passes through the inside of the pipe part 28, and communicates with the outside (in the atmosphere) through the ventilation port 28a. are doing.

That is, the ventilation path 24 takes a path bent in three directions. Particularly, since the air passage 24 is formed to be bent in the radial direction, the axial direction, and the circumferential direction of the housing 8, the air passage 24 is a three-dimensional path. In addition, the axial direction path, the circumferential direction path, and the radial direction path are the communication chamber 25,
It comprises an internal communication part 26 and an external communication part 27.

As shown in FIG. 2 and FIG.
A drain passage 29 is formed on the inner peripheral surface of the housing 8 forming the above. The motor 1 is provided on the inner peripheral surface of the housing 8.
A plurality of protrusions 30 extend in the axial direction and are formed at substantially equal intervals in the circumferential direction at a portion facing the second arc portion 22. The motor 12 is housed in the motor chamber 13 with the arc portion 22 held by the plurality of protrusions 30. The drain passage 29 includes a groove formed between the plurality of protrusions 30 and extends along the axial direction. The drain passage 29 is located above the internal communication portion 26, and the liquid leaking from the seal portion 19 is guided to the internal communication portion 26 through the drain passage 29. That is, the drain passage 29 is a passage through which the cleaning liquid leaked from the seal portion 19 passes.

Next, the operation of the washer device 1 configured as described above will be described. In the washer pump 2 of the present embodiment, since the air passage 24 that connects the motor chamber 13 and the outside of the housing 8 is provided, expansion and contraction of air in the motor chamber 13 do not occur. Therefore, the motor room 13
The air pressure in the interior is not reduced, and the inflow of the cleaning liquid from the seal portion 19 is avoided.

Further, since the ventilation path 24 takes a path bent in three directions, even if water is splashed on the inner wall of the ventilation path 24 due to receiving water, water does not enter the motor chamber 13. In particular, since the ventilation path 24 takes a three-dimensional path, infiltration of water into the motor chamber 13 is reliably prevented. Therefore, even when the housing 8 is mounted horizontally on the tank 3, it is ensured that the motor 12 leaks due to external water even when the housing 8 is mounted sideways on the tank 3 because water does not even reach the motor chamber 13 when receiving strong water. Is prevented.

The washer pump 2 is attached to a lower portion of the tank 3 so that the washing liquid can be pumped out even if the flow rate of the washing liquid in the tank 3 becomes small. Therefore, the washer pump 2 is more likely to receive water due to the splash of the water pool. However, even if the washer pump 2 receives strong water, the water is prevented from entering the motor chamber 13.

The washer pump 2 of the present embodiment is generally attached to the lower part of the tank 3 in a horizontal direction with respect to the tank 3 or a vertical direction with the suction hole 15 upward. Therefore, the pump chamber 16 is driven by the water pressure of the cleaning liquid in the tank 3.
There is a possibility that the cleaning liquid may leak from the gap of the seal portion 19 into the motor chamber 13.
The drainage passage 29 is formed in the inner peripheral surface of the body 9 of the body, so that the leaked liquid travels through the drainage passage 29 and the internal communication portion 26.
And is discharged outside through the ventilation path 24. Therefore, the motor 12 does not get wet by the leaked cleaning liquid. Further, water droplets generated in the motor chamber 13 due to condensation are also discharged to the outside through the drain passage 29 and the ventilation passage 24.

Therefore, in this embodiment, the following effects can be obtained. (1) The ventilation path 24 formed in the housing 8 so as to connect the motor chamber 13 with the outside takes a path bent in three directions. Water can be prevented. In addition, since the motor 12 having a flat cross section is used as a drive source and the ventilation path 24 is provided in the thick portion 23 of the housing 8 opposite to the flat portion 21 of the motor 12, the washer pump 2 can be made compact. it can. In addition, ventilation path 2
Providing 4 can solve the problem that the air in the motor chamber 13 contracts due to the fact that the motor chamber 13 is closed and the cleaning liquid enters from the seal portion 19.

(2) The ventilation path 24 has a three-dimensional path that is bent in three directions of the radial direction, the axial direction, and the circumferential direction of the housing 8. Therefore, intrusion of water into the motor chamber 13 can be more reliably prevented.

(3) Internal communication part 26 and external communication part 27
Is provided at both ends of the communication chamber 25, so that the length of the water entry path in the ventilation chamber 25 can be increased, and the water does not easily enter the motor chamber 13. Also,
Since the communication chamber 25 is formed in the thick portion 23, even if the path length is long, it does not lead to an increase in the size of the housing.

(4) Washer pump 2 of the present embodiment
Is mounted laterally with respect to the tank 3 or the lower part of the tank 3 with the suction hole 15 on the upper side. However, even if the cleaning liquid leaks from the seal portion 19 to the motor chamber 13, the motor chamber 1
The drainage passage 29 provided on the inner peripheral surface of the body 9 forming the third member 3 can guide the cleaning liquid to the communication passage 24 located on the opposite side of the seal portion 19 with the motor 12 interposed therebetween, with almost no wetting of the motor 12. Therefore, the cleaning liquid is supplied to the motor 1
The motor 12 can be discharged from the motor chamber 13 without penetrating into the interior of the motor 2, so that there is no fear of failure of the motor 12. In addition, water droplets generated in the motor chamber 13 due to dew condensation can be discharged to the outside through the drainage path 29 and the ventilation path 24.

(5) Since the drainage passage 29 utilizes the grooves formed between the protrusions 30 of the plurality of protrusions 30 of the body 9 formed to hold the motor 12, the drainage passage 29 is simple. Structure.

(6) Since the drainage passage 29 is located above the ventilation passage 24, the cleaning liquid having passed through the drainage passage 29 is guided to the ventilation passage 24 without any obstacle and is discharged to the outside. (Second Embodiment) Next, a second embodiment will be described with reference to FIG. In this embodiment, the location where the ventilation path 24 is formed is different from that of the previous embodiment, and the other configuration is the same. The same parts as those of the above embodiment are denoted by the same reference numerals, and the detailed description is omitted. FIG. 5 is a schematic side sectional view of a washer pump according to the second embodiment.

External communication section 31 as external communication path on the lid side
Is formed at the lower part of the lid 10 and is bent substantially at a right angle. One end of the external communication portion 31 communicates with the communication chamber 25, and the other end communicates with the outside through the ventilation port 28a. In this embodiment, the external communication part 31 is 2
By bending in the direction and communicating with the internal communication portion 26, the ventilation path 24 takes a path bent in three directions.

In this embodiment, the air passage 24 is also 3
It takes a dimensional path. That is, the external communication unit 31
Extend along the radial direction and the axial direction of the housing 8, and the internal communication portion 26 extends along the circumferential direction of the housing 8.
Also in this case, since the ventilation path 24 takes a three-dimensional path,
Water can be more reliably prevented from entering the motor chamber 13.

In this configuration, the following effects can be obtained in addition to the effects similar to (1), (2), (4), (5) and (6) of the above embodiment. (7) The ventilation port 28a is located at the tip end surface of the lid 10, that is, the housing 8. Therefore, the ventilation path 24
Is provided, the washer pump 2 can be inserted deeper into the tank 3.

The embodiment is not limited to the above, and may be modified as follows, for example. The drain passage 29 is not limited to the groove between the protrusions 30 provided on the inner peripheral surface of the body 9. For example, as shown in FIG. 6, a drain groove 32 as a groove formed to extend along the axial direction in the thick portion 23 of the body 9 may be used. In this case, the drain groove 32 may be provided as a pair with the flow path 17 interposed therebetween as shown in FIG. 6A, or may be provided on one side with respect to the flow path 17 as shown in FIG. It may be provided only at the location. Also in this case, the cleaning liquid and water droplets of dew can be discharged without wetting the motor 12 by the drain passage 29.

The air passage 24 is not limited to be formed so as to extend in the radial direction, the axial direction and the circumferential direction in the housing 8. For example, the external communication portion 27 may be formed in a tangential direction (substantially circumferential direction) in the thick portion of the body 9 and communicate with the communication chamber 25. Even in such a case, the ventilation path 24 can take a three-dimensional path.

The ventilation path 24 is not limited to a three-dimensional path. That is, any path that bends in at least three directions may be used. For example, in the first embodiment, the internal communication portion 26 may be formed in the radial direction.

The ventilation path 24 is not limited to the radial, axial, and circumferential paths of the housing 8 in order from the outside of the housing 8. That is, the order may be any. For example, the ventilation path 24 may be formed in the circumferential direction, the axial direction, and the radial direction in order from the outside of the housing 8.

In the ventilation path 24, it is desirable that the total bending angle of the path exceeds 90 degrees. Further, if the total bending angle exceeds 150 degrees, it is possible to substantially prevent water from entering the motor chamber 13, and if it is 180 degrees or more, it is possible to almost certainly prevent water from entering the motor chamber 13.

The air passage 24 may have an arc shape. For example, if the shape is a semicircular arc, the path changes by 180 degrees, so it can be considered to be bent in three directions. In this case, since the passage has a shape that is difficult for water to pass through, it is possible to prevent water from entering the motor chamber 13.

The bending angle of the air passage 24 is not limited to a substantially right angle. For example, it may be an arcuate path that curves about 90 degrees. That is, the bending angle may be bent so as to draw an arc. Although a larger bending angle is preferable, a small bending angle (for example, 40 degrees to 60 degrees) may be mixed. In short, it is only necessary that the sum of the bending angles of the path is equal to or more than a certain angle.

The air passage 24 is not limited to bend in three directions. For example, the communication chamber 25 may be bent in two directions so as to be bent in four directions. The bending direction may be five or more. By doing so, it is possible to further prevent water from entering the motor chamber 13.

The housing 8 in which the pipe is disposed in the space of the thick part of the motor 12 may be used as a part of the ventilation path 24 by the pipe. The tube 28 is not limited to a cylindrical shape. For example, pipe 2
The hole 8 may have a squeezed shape in which the hole is narrowed and squeezed toward the tip. This makes it difficult for water to penetrate into the interior even if it receives water.

The present invention is not limited to the washer pump 2 in which the housing 8 is inserted and fixed in the tank 3. For example, an introduction pipe (suction pipe) for introducing a cleaning liquid is formed in the housing,
The invention may be applied to a washer pump in which an introduction pipe is inserted into a tank and assembled, or a washer pump in which the tank and the introduction pipe are connected via a hose. In this case, if a motor 12 having a flat cross section is used as a drive source and a ventilation path is provided in a thick portion, the washer pump having an inlet pipe can be downsized.

The technical ideas other than the claims which can be grasped from the embodiment and other examples will be described below together with the effects. (1) In the invention according to any one of claims 1 to 7, the flattened portion of the motor is a thick portion facing the flat portion of the motor. In this case, the same effect as the first aspect can be obtained.

(2) In the invention described in the first aspect or the technical idea (1), the ventilation path is formed as a three-dimensional path. In this case, even if the washer pump receives water from the outside, it is possible to more reliably prevent water from entering the motor chamber.

(3) In any one of the first to seventh aspects and the technical ideas (1) and (2), the washer pump is assembled by inserting a part of the housing into the tank. In this case, a water pressure is applied to the seal portion, but even if the liquid enters the motor chamber, it can be discharged to the outside.

(4) In any one of the first to seventh aspects and the technical ideas (1) to (3), the housing is positioned laterally with respect to the tank or the ventilation path is located above the motor chamber. It is attached in the state where it did. In this case, there is a concern that water that has entered the motor chamber from the ventilation path will flow along the inner wall of the motor chamber to the motor, but the ventilation path will bend in at least three directions and water will not enter the motor chamber. However, even with such an attachment, there is no possibility that water will enter due to being wet, and water will travel along the motor chamber to wet the motor.

(5) In any one of the first to seventh aspects and the technical ideas (1) to (4), the vent opening to the outside of the ventilation path fixes a washer pump to the tank. Then, it is located at the substantially lowermost point of the housing. In this case, liquid or the like that has entered the motor chamber can be effectively discharged to the outside.

[0063]

( 6 ) In any one of the first to seventh aspects and the technical ideas (1) to ( 5 ), the ventilation path may have a total bending angle of the path exceeding at least 90 degrees. Is formed. In this case, when water is received, it becomes more difficult for water to enter the motor chamber.

( 7 ) In the invention according to claim 1,
In the housing, a lid is fitted to one end of a housing body, and the ventilation path is provided inside the lid.
A cover-side external communication passage formed to communicate with the outside of the housing in at least two directions, and a circumferential direction of the housing such that the cover-side external air passage and the motor chamber communicate with a flattened portion of the housing. And a circumferential direction path formed so as to extend to the right. In this case, even if the ventilation path is provided, the housing can be inserted deeper into the tank.

[0066]

As described in detail above, according to the first and seventh aspects of the present invention, the ventilation path communicating between the motor chamber and the outside is formed as a path bent in at least three directions. The water can be prevented from penetrating into the motor chamber even if the water is strong. Further, since at least a part of the ventilation path is provided in the flattened portion of the housing, the washer pump can be made compact.
In addition, the liquid that has entered the motor chamber from the seal part is
Guides the motor to the ventilation path without wetting
Wear.

According to the second and seventh aspects of the present invention, in addition to the effects of the first aspect, the ventilation path is
Since the three-dimensional path is formed by the circumferential direction path, the axial direction path, and the radial direction path, it is possible to more surely prevent water from entering the motor chamber even if it is exposed to water from the outside.

According to the third and seventh aspects of the present invention, in addition to the effect of the second aspect, at least the axial direction path is formed in the flattened portion, so that the water is protected. An air passage having a sufficient path length can be provided to prevent water from entering the motor chamber even when received.

According to the fourth and seventh aspects of the present invention, in addition to the effect of the first aspect of the present invention, the liquid transmitted through the drainage passage is free of obstacles.
It can be guided to the air passage and discharged to the outside of the housing .

According to the fifth and seventh aspects of the present invention, in addition to the effects of the first to fourth aspects, the motor is held on the inner peripheral surface of the housing. Since the grooves formed between the projections are used as the drainage passages, it is possible to reduce the size even if the drainage passages are provided.

According to the sixth and seventh aspects of the present invention, in addition to the effect of the first aspect of the present invention, the drainage path is formed by omitting the flattened portion of the housing. Since the groove portion is formed by utilizing, even if the groove portion is provided, the washer pump can be made compact.

[Brief description of the drawings]

FIG. 1 is a side sectional view of a washer pump according to a first embodiment.

FIG. 2 is a sectional view taken along line II-II in FIG.

FIG. 3 is a sectional view taken along line III-III in FIG.

FIG. 4 is a partially cutaway side view of the vehicle washer device.

FIG. 5 is a schematic sectional side view of a washer pump according to a second embodiment.

FIG. 6 is a front sectional view of a washer pump according to another example, in which (a) shows a pair of drain passages,
(B) has one drain passage.

FIG. 7 is a schematic sectional side view of a washer pump of a type in which a housing is inserted and fixed in a tank in a conventional technique.

FIG. 8 is a schematic sectional side view of another washer pump in the prior art.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Washer device, 2 ... Washer pump, 3 ... Tank, 8 ... Housing, 10 ... Lid, 12 ... Motor, 23
... a thick portion as a flattened omission portion, 24 ... a ventilation path, 25 ... a communication chamber as an axial direction path, 26 ... an internal communication section as a circumferential direction path, 27 ... an external communication section as a radial direction path, 29: drain passage, 30: convex portion, 31: external communication portion as lid-side external communication passage, 32: drain groove as a groove portion.

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) B60S 1/02-1/60 F04B 23/02

Claims (7)

(57) [Claims] 1. A motor chamber (1) inside a housing (8).
3) A washer pump (2) in which a motor (12) having a flat cross section is accommodated in the washer pump (2), wherein the housing (8) communicates with the motor chamber (13) and the outside of the housing (8). ), At least a part of which is a flat portion (2 ) of the motor (12).
The flattened portion (2 ) of the housing (8) opposed to (1)
Provided so as to pass through the 3), the path of the air passage (24) sequentially
The housing is bent in at least three directions, forming the motor chamber (13) to (8)
A drain passage (29) is provided on the inner peripheral surface of the drainage passage.
A washer pump characterized in that a passage (29) communicates with the ventilation passage (24) . 2. The air passage (24) has an axial direction path (25) formed to extend along the axial direction of the housing (8), and extends in the circumferential direction of the housing (8). And a radial direction path (27) formed so as to extend in a radial direction of the housing (8). Washer pump as described. 3. The ventilation path (24), wherein at least the axial direction path (25) extending in the axial direction of the housing (8) is formed so as to pass through the flattened portion (23). The washer pump according to claim 2, characterized in that: 4. The drainage passage (29) is provided with the ventilation passage (29).
The washer pump according to any one of claims 1 to 3, wherein the washer pump is provided at a position higher than (24) . 5. The drain passage (29) extends in the axial direction between a plurality of protrusions (30) provided on an inner peripheral surface of the housing (8) for holding the motor (12). It is a formed groove part, The claim 1 characterized by the above-mentioned .
The washer pump according to claim 4 . 6. The drain passage (29) is a groove formed in the flat omission portion (23) of the housing (8) so as to extend in the axial direction .
Washer pon according to any one of claims 5 to 7.
H. 7. A vehicle washer device comprising the washer pump (2) according to any one of claims 1 to 6 and a tank (3).