JP5113719B2 - Washer pump and washer device - Google Patents

Description

  The present invention relates to a washer pump and a washer device that have a pair of discharge passages through which a washer liquid flows, and in which the washer liquid flows through one of the discharge passages according to the rotation direction of a motor that rotates forward and backward.

  Conventionally, windshields are respectively provided on the front side and rear side of a vehicle such as an automobile, and a washer device for cleaning each windshield is installed at a predetermined location in the engine room. The washer device includes a washer pump having a motor and a washer tank for storing washer fluid. The motor of the washer pump is driven to rotate in forward and reverse directions by operating an operation switch, and the washer liquid in the washer tank is individually sprayed to each windshield in accordance with the rotational direction of the motor. Then, the windshield can be cleaned by driving the wiper device and wiping the washer liquid sprayed on the windshield with the wiper blade.

As such a washer device, for example, the one described in Patent Document 1 is known. The washer device described in Patent Document 1 includes a motor having a rotating shaft and a pump body that houses the motor, and an inlet (inlet) that sucks washer fluid at one end side in the axial direction of the pump body. In addition, a valve device and a connector portion are provided on the other axial end side of the pump body. The valve device is provided with two discharge pipes (outlets) and a valve body (switching valve) that moves in a direction orthogonal to the axial direction of the rotating shaft. Then, the pump body is inserted into the washer tank from the axial direction of the rotating shaft, the suction port side of the pump body is disposed in the washer tank, and the valve device and connector side of the pump body are disposed outside the washer tank. ing.
Japanese Patent Laying-Open No. 2004-1000059 (FIG. 1)

  By the way, since the washer device is mounted in a limited installation space in the engine room of the vehicle, it is desirable to improve its layout property. By preparing a washer device with improved layout property, one washer device is provided. The device can be used for various vehicles (small cars, large cars, etc.).

  However, according to the washer device described in Patent Document 1 described above, the valve device and the connector portion are arranged outside the washer tank so as to be aligned in the axial direction of the rotating shaft. Therefore, the layout of the washer device on the vehicle and the installation workability are reduced.

  The objective of this invention is providing the washer pump and washer apparatus which can improve the layout property to an installation space, and attachment workability | operativity.

  The washer pump according to the present invention includes a motor that rotates in the forward and reverse directions, a first discharge passage through which the washer liquid flows by rotating the motor in the forward direction, and the washer liquid that flows by rotating in the reverse direction of the motor. A washer pump having a second discharge path, a rotating shaft provided at a rotation center of the motor, an impeller provided on one axial end side of the rotating shaft, a pump body housing the motor, An in-liquid arrangement portion provided in one end of the pump body in the axial direction and disposed in a washer tank for storing the washer liquid; a pump chamber provided in the in-liquid arrangement portion and rotatably accommodating the impeller; A first valve chamber that is provided on one axial end side of the pump chamber and communicates the pump chamber and the first discharge passage, and communicates the pump chamber and the second discharge passage. A second valve chamber, provided between the first valve chamber and the second valve chamber, and moved by a pressure difference between the first valve chamber and the second valve chamber; A first communication state in which the first discharge path is communicated and the second valve chamber and the second discharge path are not communicated, and the second valve chamber and the second discharge path are communicated to the first valve chamber. And a switching valve that switches between a second communication state in which the first discharge path is not in communication.

  The washer pump of the present invention is characterized in that the first valve chamber and the second valve chamber are arranged so as to partially overlap the pump chamber in the axial direction.

  The washer device according to the present invention includes a motor that rotates in the forward and reverse directions, a first discharge passage through which the washer liquid flows through rotation of the motor in the forward direction, and the washer liquid that flows through rotation in the reverse direction of the motor. A washer pump having a second discharge passage, and a washer device having a washer tank for storing the washer fluid, wherein the washer pump is connected to a rotation shaft provided at a rotation center of the motor, An impeller provided on one axial end side, a pump main body that houses the motor, an in-liquid arrangement portion that is provided on one axial end side of the pump main body and is disposed in a washer tank that stores the washer liquid; A pump chamber provided in the submerged arrangement portion and rotatably accommodating the impeller, and provided on one end side in the axial direction from the pump chamber. A first valve chamber communicating with the pump chamber and the first discharge passage; a second valve chamber communicating with the pump chamber and the second discharge passage; and the first valve chamber and the second valve chamber. Provided between the first valve chamber and the second valve chamber, and moves by the pressure difference between the first valve chamber and the second valve chamber to communicate the first valve chamber and the first discharge passage. Switching between a first communication state in which the first valve chamber and the second discharge passage are connected to each other and a second communication state in which the first valve chamber and the first discharge passage are disconnected. The washer tank is formed from a tank wall that forms an outline of the washer tank, and an insertion hole that is provided in the tank wall and in which the liquid placement portion is inserted from the axial direction of the rotating shaft. It is characterized by doing.

  The washer device according to the present invention is characterized in that the first valve chamber and the second valve chamber are arranged so as to partially overlap the pump chamber in the axial direction.

  The washer device according to the present invention is characterized in that the tank wall in which the insertion hole is provided is provided by retracting a predetermined amount to the inside of the washer tank.

  According to the present invention, the first valve chamber and the second valve chamber are provided closer to one end side in the axial direction than the pump chamber, and the first valve chamber and the second valve chamber are provided between the first valve chamber and the second valve chamber. A first communication state in which the first valve chamber and the first discharge passage are communicated and the second valve chamber and the second discharge passage are not communicated, and the second valve chamber and the second discharge passage. Since there is a switching valve that switches between the first valve chamber and the second communication state in which the first discharge passage is disconnected, the number of parts that can be placed in the washer tank of the washer pump is increased, and the washer pump outside the washer tank The amount of protrusion to can be reduced. Therefore, it is possible to improve layout and installation workability in the installation space of the washer device.

  According to the present invention, since the first valve chamber and the second valve chamber are arranged so as to partially overlap the pump chamber in the axial direction, the diameter of the washer pump can be reduced. Therefore, the length dimension of the seal portion between the washer pump and the washer tank can be shortened, and the sealing performance can be improved.

  According to the present invention, since the tank wall in which the insertion hole is provided is provided by being retracted by a predetermined amount to the inside of the washer tank, the outer shape of the washer device can be simplified. Therefore, it is possible to improve the transfer efficiency in the state where the washer pump is assembled to the washer tank, that is, the washer device assembly (sub assembly), and the washer pump is detached from the washer tank during the transfer in the washer device assembly. Etc. can be suppressed.

  Hereinafter, a first embodiment of the present invention will be described in detail with reference to the drawings.

  1 is a partial sectional view showing the washer device according to the first embodiment, FIG. 2 is a perspective view showing the appearance of the washer pump in FIG. 1, and FIG. 3 is a sectional view taken along the line AA in FIG. 4 is a cross-sectional view taken along line BB in FIG. 1, and FIG. 5 is a cross-sectional view taken along line CC in FIG.

  As shown in FIG. 1, the washer device 10 includes a washer tank 20 and a washer pump 30, and the washer device 10 is attached to a predetermined location in an engine room (not shown) of a vehicle such as an automobile. It has become.

  The washer tank 20 is formed in a box shape from a resin material such as plastic, and a washer liquid W for cleaning a windshield (not shown) is stored therein. A tank wall 21 that forms an outline of the washer tank 20 is provided on the bottom side (lower side in the figure) of the washer tank 20, and one end side in the axial direction of the washer pump 30 (left side in the figure) is provided on the tank wall 21. Is provided with an insertion hole 22 into which the armature shaft 38 is inserted from the axial direction.

  The insertion hole 22 is fitted with an elastic grommet 23 formed in an annular shape by an elastic material such as rubber. The elastic grommet 23 is configured to be elastically deformed and sealed between the washer tank 20 and the washer pump 30, whereby the washer liquid W leaks from between the washer tank 20 and the washer pump 30. Further, rattling of the washer pump 30 with respect to the washer tank 20 is prevented.

  The tank wall 21 in which the insertion hole 22 is provided is provided by retracting a predetermined amount inside the washer tank 20 (left side in the figure) from the tank wall 24 of the other part. A pump housing space S in which the other axial end side (the right side in the drawing) of the washer pump 30 is disposed is formed on the lower side. Here, the retraction amount of the tank wall 21 into the washer tank 20 is determined by the size of the washer pump 30 and the required capacity of the washer tank 20.

  The washer pump 30 includes a main body cylinder portion (pump main body) 31 formed in a cylindrical shape from a resin material such as plastic, and the main body cylinder portion 31 is provided on one end side in the axial direction of the main body cylinder portion 31 to provide a washer. It has an in-liquid arrangement part 32 arranged in the tank 20 and an out-of-liquid arrangement part 33 arranged in the pump housing space S outside the washer tank 20 provided on the other axial end side of the main body cylinder part 31. ing.

  An electric motor (motor) 34 assembled in another assembling process is accommodated in the upper side of the inside of the main body cylindrical portion 31 in the figure. The electric motor 34 includes a yoke 35 having a substantially oval cross section by pressing a steel plate. A pair of permanent magnets 36 are fixed inside the yoke 35 so as to face each other. Inside each permanent magnet 36, an armature core 37 is rotatably provided via a predetermined gap. An armature shaft (rotating shaft) 38 is provided at the rotation center of the armature core 37, that is, the rotation center of the electric motor 34, and the armature shaft 38 is rotatable together with the armature core 37. One end side in the axial direction of the armature shaft 38 is rotatably supported by a first bearing 39 supported by the yoke 35, and the other end side in the axial direction of the armature shaft 38 is supported by a second bearing 41 supported by the brush holder 40. It is supported rotatably.

  A commutator 43 with which a pair of power supply brushes 42 are slidably contacted is fixed in the vicinity of the armature core 37 on the other axial end side of the armature shaft 38. A coil wound around the armature core 37 is fixed to the commutator 43. The ends of 44 are electrically connected. The armature core 37 is configured to rotate in the forward and reverse directions at a predetermined rotational speed in accordance with the magnitude and direction of the drive current supplied to each power supply brush 42. One end side of a pair of power supply terminals 45 (only one is shown in the drawing) is electrically connected to each power supply brush 42, and the other end side of each power supply terminal 45 is integrated with the second lid member 70. It protrudes inside the provided connector connecting portion 73.

  As shown in FIG. 4, an impeller 46 having three blades extending radially from the central portion is fixed to one axial end side of the armature shaft 38. The impeller 46 and the armature shaft 38 are fixed by so-called D-cut fitting so that they cannot be rotated relative to each other, and the impeller 46 is rotatable together with the armature shaft 38.

  A valve block 47 is provided on one end side in the axial direction of the main body cylinder portion 31, that is, on one end side in the axial direction of the liquid placement portion 32. The valve block 47 is formed in a bottomed cylindrical shape from a resin material such as plastic, and includes a bottom wall 48 and a peripheral wall 49. The peripheral wall 49 extends from the bottom wall 48 to one end in the axial direction, and a horn (resonator) serving as a jig when the valve block 47 is ultrasonically welded to the submerged portion 32 is attached to the peripheral wall 49. ) Is to be installed.

  A suction opening (inlet) 50 for sucking the washer liquid W stored in the washer tank 20 is formed in a portion of the bottom wall 48 facing the rotation center of the impeller 46. The suction opening 50 is provided at a predetermined distance H1 from the bottom side of the washer tank 20 with the washer pump 30 attached to the washer tank 20.

  As shown in FIG. 3, a substantially fan-shaped first valve chamber 51 and a second valve chamber 52 facing each other on the left and right sides in the drawing are provided on the lower side of the valve block 47 in the drawing. One end side of a first pump passage 53 and a second pump passage 54 provided in the bottom wall 48 is communicated with each valve chamber 51, 52, and the other end side of each pump passage 53, 54 is connected to the bottom wall. It communicates with a pump chamber 55 formed between 48 and the submerged arrangement portion 32. The valve chambers 51 and 52 are arranged on one end side in the axial direction from the pump chamber 55 of the submerged arrangement portion 32 so as to partially overlap the pump chamber 55 in the axial direction, thereby reducing the diameter of the washer pump 30. Thus, the diameter of the elastic grommet 23 is suppressed.

  A first valve seat member 56 and a second valve seat member 57 that protrude so as to face each other are integrally provided in the valve chambers 51 and 52. The first valve seat passage 58 and the second valve seat passage 59 are provided, respectively. A switching valve 60 is provided between the first valve seat member 56 and the second valve seat member 57, that is, between the first valve chamber 51 and the second valve chamber 52 so as to partition the valve chambers 51, 52. The switching valve 60 is supported by a valve support portion 61 provided between the first valve chamber 51 and the second valve chamber 52. The switching valve 60 is formed in a substantially square shape by an elastic material such as rubber, and adopts a so-called diaphragm type valve structure.

  A first lid member 62 formed in a substantially semicircular shape by a resin material such as plastic is provided on one end side in the axial direction of the valve block 47. The first lid member 62 is connected to the valve block 47 by ultrasonic welding, and closes the valve chambers 51 and 52. The first lid member 62 is integrally provided with a valve support portion 63 that supports a part of the switching valve 60, and the switching valve 60 is supported by the valve support portions 61 and 63 without rattling.

  A pump chamber 55 that rotatably accommodates the impeller 46 is integrally provided at one end side in the axial direction of the submerged arrangement portion 32, and the pump chamber 55 communicates with the washer tank 20 through the suction opening 50. In addition, the valve chambers 51 and 52 communicate with each other via the pump passages 53 and 54 (see FIG. 3).

  As shown in FIG. 1, in the lower side of the figure than the electric motor 34 of the main body cylinder portion 31, the main body cylinder portion 31 is arranged in parallel along the axial direction of the main body cylinder portion 31 (the liquid placement portion 32 and the liquid placement portion 33). Thus, the 1st discharge path 64 and the 2nd discharge path 65 as an outlet are provided integrally. One end sides of the discharge passages 64 and 65 are connected to the valve chambers 51 and 52 via the valve seat passages 58 and 59 of the valve seat members 56 and 57, respectively. Here, the first valve chamber 51 communicates the pump chamber 55 and the first discharge path 64, and the second valve chamber 52 communicates the pump chamber 55 and the second discharge path 65.

  As shown in FIG. 5, a first discharge pipe 66 and a second discharge pipe 67 are integrally provided on the outer peripheral side of the outside liquid arrangement portion 33, and the distal ends of the discharge pipes 66 and 67 are opposite to each other. It is directed to the outside in the radial direction of the outside liquid arrangement portion 33 so as to be oriented. The other end sides of the discharge paths 64 and 65 are provided inside the discharge pipes 66 and 67, and the discharge paths 64 and 65 are bent at substantially right angles at the base end portions of the discharge pipes 66 and 67, respectively. It has been.

  As shown in FIG. 3, the valve seat members 56 and 57 are opposed to each other on both sides of the switching valve 60 with a predetermined gap, and the end of each valve seat member 56 and 57 on the switching valve 60 side. The parts are a first valve seat 68 and a second valve seat 69, respectively. One side surface 60a and the other side surface 60b provided on both sides of the switching valve 60 are attached to and detached from the valve seats 68 and 69, respectively.

  The switching valve 60 includes a support side portion 60c supported by the valve support portions 61 and 63, a valve body 60d that is formed in a thick and substantially disk shape and includes one side surface 60a and another side surface 60b, and each support A thin film portion 60e that connects the side portion 60c and the valve body 60d is provided. As a result, the valve body 60d can be easily moved relative to each support side 60c.

  The valve main body 60d of the switching valve 60 is provided so as to be movable in a direction orthogonal to the axial direction of the armature shaft 38 so as to be separated from and seated on the valve seats 68 and 69, and in the first valve chamber 51 and the second valve chamber 52 It moves by the pressure difference. The switching valve 60 switches between a first communication state and a second communication state shown below.

  That is, the first communication state of the switching valve 60 is that the one side surface 60a is separated from the first valve seat 68 and the other side surface 60b is seated on the second valve seat 69, and the first valve chamber 51 and the first discharge passage 64 are separated. And the second valve chamber 52 and the second discharge path 65 are not in communication. Further, the second communication state of the switching valve 60 is that the other side surface 60 b is separated from the second valve seat 69 and the one side surface 60 a is seated on the first valve seat 68, and the second valve chamber 52 and the second discharge path 65. And the first valve chamber 51 and the first discharge passage 64 are not in communication.

  As shown in FIG. 1, a second lid member 70 is provided on the other axial end side of the main body cylindrical portion 31, that is, on the other axial end side of the external liquid arranging portion 33. The second lid member 70 is formed in a substantially disk shape from a resin material such as plastic, and is connected to the outside liquid arrangement portion 33 by three claw portions 71. A connector connection portion 73 to which an external connector 72 for supplying a drive current to the electric motor 34 is connected is integrally formed on the outer peripheral side in the radial direction of the second lid member 70. As shown in FIG. 1, the connector connecting portion 73 is provided so as to face the upper side in the figure at a predetermined angle with the washer pump 30 attached to the washer tank 20. Can be easily connected.

  As shown in FIG. 2, one end of a front washer tube 74 is connected to the tip of the first discharge pipe 66, and one end of a rear washer tube 75 is connected to the tip of the second discharge pipe 67. Yes. A front washer nozzle 76 and a rear washer nozzle 77 for injecting the washer fluid W to the front and rear windshields (not shown) are connected to the other end of each of the washer tubes 74 and 75 (FIG. 1). reference). In addition, the first discharge pipe 66 and the second discharge pipe 67 are arranged to face each other so that the operations of connecting the washer tubes 74 and 75 to the discharge pipes 66 and 67 can be easily performed. ing.

  As shown in FIG. 1, a controller (control device) 79 is electrically connected to an external connector 72 connected to the connector connection portion 73 via a wiring 78. An operation switch 80 provided in a room (not shown) or the like is electrically connected.

  Next, the assembly procedure of the washer pump 30 will be described in detail with reference to the drawings.

  FIG. 6 is an explanatory diagram for explaining the assembly procedure of the washer pump, and FIGS. 7 (a), (b) and (c) are explanatory diagrams for explaining the procedure of ultrasonic welding to the submerged portion of the valve block. Represents.

  First, the main body cylinder part 31 formed by injection molding or the like is prepared, and the electric motor 34 is inserted from the openings on the discharge pipes 66 and 67 side of the main body cylinder part 31. Next, the impeller 46 is attached to the armature shaft 38 so as to face the pump chamber 55 side of the main body cylindrical portion 31. Thereafter, the second lid member 70 in which each power supply terminal 45 is insert-molded is attached to the main body cylinder portion 31 and fixed by the claw portions 71. Thereby, the motor assembly MA is completed (first step).

  Next, as shown in FIG. 7 (a), the opening side of the valve block 47 is attached to the horn H of an ultrasonic welder (not shown), and under this state, as shown by the arrow in the figure. The bottom wall 48 of the valve block 47 faces the impeller 46 side of the motor assembly MA. The horn H is formed with a holding groove G that follows the shape of the peripheral wall 49 of the valve block 47, and the valve block 47 is held by the horn H by lightly pressing the peripheral wall 49 into the holding groove G.

  As shown in FIGS. 7 (a) and 7 (b), the contact portion CE1 of the valve block 47 is brought into contact with the tapered contact surface CS1 of the submerged arrangement portion 32, and each of the valve seat passages 58, 59 and The contact surface CS2 and the contact portion CE2 between the discharge passages 64 and 65 are brought into contact with each other, and in this state, the horn H is vibrated in the vertical direction as indicated by a broken line arrow in the figure. At this time, the vibration frequency of the horn H is set to a high frequency of 20 kHz or more, for example, and a large frictional force is generated at the contact portion between the submerged arrangement portion 32 and the valve block 47. Thereby, the valve block 47 can be welded to the submerged arrangement part 32. Thereafter, the horn H is pulled away from the valve block 47 as shown by the arrow in FIG. 7C (second step).

  Next, the switching valve 60 is prepared, and the switching valve 60 is attached to the valve support 61 from one axial end side of the valve block 47. Thereafter, ultrasonic welding is performed so that the first lid member 62 faces the opening side of the valve block 47 and the valve chambers 51 and 52 are closed. At this time, the valve support 63 of the first lid member 62 is aligned with the switching valve 60. Thereby, the washer pump 30 is completed (third step).

  Next, the operation of the washer device 10 according to the first embodiment configured as described above will be described with reference to FIGS.

  FIGS. 8A, 8B, and 8C are explanatory views for explaining the flow of the washer liquid when the motor rotates in the forward direction, and FIGS. 9A, 9B, and 9C are diagrams illustrating the motor. Explanatory drawing explaining the flow of a washer liquid at the time of rotation to a reverse direction is each represented.

[When cleaning the front windshield]
When the operation switch 80 is turned on (front cleaning operation) to clean the front windshield, the armature shaft 38 of the electric motor 34 rotates in the forward direction as indicated by an arrow (1) in FIG. Then, the impeller 46 also rotates in the forward direction along with the forward rotation of the armature shaft 38, whereby the washer liquid W in the washer tank 20 shown in FIG. (Arrow (2)).

  The washer fluid W sucked into the pump chamber 55 is firstly passed through the first pump passage 53 as shown by an arrow (3) in FIGS. 8A and 8B as the impeller 46 rotates forward. It is pumped into the valve chamber 51. Then, the pressure in the first valve chamber 51 increases while the pressure in the second valve chamber 52 decreases. Due to the pressure difference between the valve chambers 51 and 52, the switching valve 60 moves in the direction indicated by the arrow (4) in FIG. 8A, and then, as indicated by the arrow (5), within the first valve chamber 51. From this, the washer fluid W flows into the first valve seat passage 58.

  As the switching valve 60 moves, the other side surface 60b is seated on the second valve seat 69, and the switching valve 60 enters the first communication state described above. As a result, as shown by arrows (5) in FIGS. 8B and 8C, the washer fluid W flows to the first discharge passage 64 via the first valve seat passage 58 and passes through the front washer tube 74. Then, the washer liquid W is ejected from the front washer nozzle 76.

[When cleaning rear windshield]
When the operation switch 80 is turned on (rear cleaning operation) to clean the rear windshield, the armature shaft 38 of the electric motor 34 rotates in the reverse direction as shown by an arrow (6) in FIG. Then, the impeller 46 also rotates in the reverse direction with the reverse rotation of the armature shaft 38, whereby the washer fluid W in the washer tank 20 shown in FIG. 1 is sucked into the pump chamber 55 through the suction opening 50. (Arrow (7)).

  The washer fluid W sucked into the pump chamber 55 is secondly passed through the second pump passage 54 as shown by arrows (8) in FIGS. It is pumped into the valve chamber 52. Then, the pressure in the second valve chamber 52 increases while the pressure in the first valve chamber 51 decreases. Due to the pressure difference in each valve chamber 51, 52, the switching valve 60 moves in the direction indicated by the arrow (9) in FIG. 9 (a), and then, as indicated by the arrow (10), in the second valve chamber 52. The washer fluid W flows into the second valve seat passage 59 from above.

  With the movement of the switching valve 60, the one side surface 60a is seated on the first valve seat 68, and the switching valve 60 enters the second communication state described above. As a result, as shown by arrows (10) in FIGS. 9B and 9C, the washer fluid W flows into the second discharge passage 65 via the second valve seat passage 59 and passes through the rear washer tube 75. Then, the washer liquid W is ejected from the rear washer nozzle 77.

  As described above in detail, according to the washer pump 30 according to the first embodiment, the first valve chamber 51 and the second valve chamber 52 are provided on one end side in the axial direction from the pump chamber 55. Between the first valve chamber 51 and the second valve chamber 52 due to a pressure difference between the first valve chamber 51 and the second valve chamber 52, and the first valve chamber 51 and the first discharge passage 64 are communicated with each other. The first communication state in which the chamber 52 and the second discharge path 65 are not connected, and the first valve chamber 51 and the first discharge path 64 are not connected by connecting the second valve chamber 52 and the second discharge path 65. A switching valve 60 that switches between the second communication state is provided. Therefore, the part which can be arrange | positioned in the washer tank 20 of the washer pump 30 can be increased, and the protrusion amount of the washer pump 30 to the outside of the washer tank 20 can be reduced. Thereby, the layout property and installation workability | operativity to the installation space of the washer apparatus 10 can be improved.

  Further, according to the washer pump 30 according to the first embodiment, the first valve chamber 51 and the second valve chamber 52 are arranged so as to partially overlap the pump chamber 55 in the axial direction. Can be achieved. Therefore, the length dimension of the seal portion between the washer pump 30 and the washer tank 20, that is, the length dimension of the elastic grommet 23 in the circumferential direction can be shortened, and the sealing performance can be improved.

  Furthermore, according to the washer pump 30 according to the first embodiment, the tank wall 21 in which the insertion hole 22 is provided is retracted by a predetermined amount to the inside of the washer tank 20, so that the outer shape of the washer device 10 is simplified. Can be Accordingly, it is possible to improve the transport efficiency in the state in which the washer pump 30 is assembled to the washer tank 20, that is, the assembly (sub-assembly) of the washer device 10, and the washer pump during the transport in the assembly of the washer device 10 Dropping off from the 30 washer tanks 20 can be suppressed.

  Next, a second embodiment of the present invention will be described in detail with reference to the drawings. Note that portions having the same functions as those of the first embodiment described above are denoted by the same reference numerals, and detailed description thereof is omitted.

  FIG. 10 is a partial sectional view showing a washer device according to the second embodiment.

  As shown in FIG. 10, the washer device 90 according to the second embodiment has the washer pump 91 turned upside down as compared with the first embodiment described above, and accordingly, the workability of connecting the external connector 72 is improved. In order to ensure this, the direction of the tip end side of the connector connecting portion 92 is also different in that it is turned upside down.

  Thereby, also in the washer pump 91 and the washer device 90 which concern on 2nd Embodiment, there can exist an effect similar to 1st Embodiment mentioned above.

  In addition, in the second embodiment, with the washer pump 91 attached to the washer tank 20, the suction opening 50 is separated from the bottom side of the washer tank 20 by a predetermined distance H2 (H2 <H1). Since it can be provided at the position, the amount of the washer liquid W that cannot be sucked can be reduced as compared with the first embodiment. Therefore, the capacity of the washer liquid W that can be sucked by the washer pump 91 is increased, and as a result, the capacity of the washer tank 20 can be apparently increased.

  It goes without saying that the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the scope of the invention. For example, in each of the above-described embodiments, the switching valve 60 is formed in a substantially square shape. However, the present invention is not limited to this, and a circular shape or the like may be used depending on the specification (characteristics) of the switching valve. A switching valve formed in another shape can also be used.

  In each of the above embodiments, the washer pump 30 (91) is mounted on the washer tank 20 so that the moving direction of the switching valve 60 is perpendicular to the paper surface as shown in FIGS. However, the present invention is not limited to this, and the relative rotation angle of the washer pump 30 (91) with respect to the washer tank 20 can be changed according to the installation space of the washer device 10 (90), the pulling direction of the external connector 72, and the like. It can also be worn with

  Further, in each of the above-described embodiments, the washer device 10 (90) has been described as being mounted on a vehicle such as an automobile. However, the present invention is not limited to this, and is applied to, for example, an aircraft, a railway vehicle, a construction machine, It can also be used as an installed washer device.

It is a fragmentary sectional view showing the washer device concerning a 1st embodiment. It is a perspective view which shows the external appearance of the washer pump of FIG. It is sectional drawing which follows the AA line of FIG. It is sectional drawing which follows the BB line of FIG. It is sectional drawing which follows the CC line of FIG. It is explanatory drawing explaining the assembly procedure of a washer pump. (A), (b), (c) is explanatory drawing explaining the procedure of the ultrasonic welding to the liquid placement part of a valve block. (A), (b), (c) is explanatory drawing explaining the flow of a washer liquid at the time of rotation to the positive direction of a motor. (A), (b), (c) is explanatory drawing explaining the flow of a washer liquid at the time of rotation to the reverse direction of a motor. It is a fragmentary sectional view showing a washer device concerning a 2nd embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Washer device 20 Washer tank 21 Tank wall 22 Insertion hole 23 Elastic grommet 24 Tank wall 30 Washer pump 31 Body cylinder part (motor body)
32 Liquid placement portion 33 Liquid placement portion 34 Electric motor (motor)
35 Yoke 36 Permanent magnet 37 Armature core 38 Armature shaft (rotating shaft)
39 First bearing 40 Brush holder 41 Second bearing 42 Power supply brush 43 Commutator 44 Coil 45 Power supply terminal 46 Impeller 47 Valve block 48 Bottom wall 49 Peripheral wall 50 Suction opening 51 First valve chamber 52 Second valve chamber 53 First pump Passage 54 second pump passage 55 pump chamber 56 first valve seat member 57 second valve seat member 58 first valve seat passage 59 second valve seat passage 60 switching valve 60a one side 60b other side 60c support side 60d valve body 60e Thin film part 61 Valve support part 62 First lid member 63 Valve support part 64 First discharge path 65 Second discharge path 66 First discharge pipe 67 Second discharge pipe 68 First valve seat 69 Second valve seat 70 Second lid member 71 Claw 72 External connector 73 Connector connection 74 Front washer tube 75 Rear washer tube 76 Flow Toner washer nozzle 77 Rear washer nozzle 78 Wiring 79 Controller 80 Operation switch 90 Washer device 91 Washer pump 92 Connector connection part CE1, CE2 contact part CS1, CS2 contact surface G Holding groove H Horn MA Motor assembly S Pump housing space W Washer liquid

Claims (5)

A motor that rotates in the forward and reverse directions, a first discharge path through which the washer liquid flows by rotation of the motor in the forward direction, and a second discharge path through which the washer liquid flows by rotation in the reverse direction of the motor. A washer pump having
A rotating shaft provided at the rotation center of the motor;
An impeller provided on one axial end side of the rotating shaft;
A pump body containing the motor;
An in-liquid arrangement part that is provided on one end side in the axial direction of the pump body and is arranged in a washer tank for storing the washer liquid;
A pump chamber provided in the submerged arrangement portion and rotatably accommodating the impeller;
A first valve chamber that is provided on one axial end side than the pump chamber, and that communicates the pump chamber and the first discharge passage; and a second valve chamber that communicates the pump chamber and the second discharge passage;
It is provided between the first valve chamber and the second valve chamber, moves due to a pressure difference between the first valve chamber and the second valve chamber, and communicates the first valve chamber and the first discharge passage. A first communication state in which the second valve chamber and the second discharge path are not in communication, and the first valve chamber and the first discharge path by connecting the second valve chamber and the second discharge path. A washer pump comprising: a switching valve that switches between a second communication state in which communication is not performed.   2. The washer pump according to claim 1, wherein the first valve chamber and the second valve chamber are arranged so as to partially overlap the pump chamber in the axial direction. A motor that rotates in the forward and reverse directions, a first discharge path through which the washer liquid flows by rotation of the motor in the forward direction, and a second discharge path through which the washer liquid flows by rotation in the reverse direction of the motor. A washer device comprising a washer pump and a washer tank for storing the washer fluid,
The washer pump,
A rotating shaft provided at the rotation center of the motor;
An impeller provided on one axial end side of the rotating shaft;
A pump body containing the motor;
An in-liquid arrangement part that is provided on one end side in the axial direction of the pump body and is arranged in a washer tank for storing the washer liquid;
A pump chamber provided in the submerged arrangement portion and rotatably accommodating the impeller;
A first valve chamber that is provided on one axial end side than the pump chamber, and that communicates the pump chamber and the first discharge passage; and a second valve chamber that communicates the pump chamber and the second discharge passage;
It is provided between the first valve chamber and the second valve chamber, moves due to a pressure difference between the first valve chamber and the second valve chamber, and communicates the first valve chamber and the first discharge passage. A first communication state in which the second valve chamber and the second discharge path are not in communication, and the first valve chamber and the first discharge path by connecting the second valve chamber and the second discharge path. And a switching valve that switches between a second communication state in which communication is not performed,
The washer tank,
A tank wall that forms the outer shell of the washer tank;
A washer device, comprising: an insertion hole provided in the tank wall, wherein the liquid placement portion is inserted from an axial direction of the rotating shaft.   4. The washer device according to claim 3, wherein the first valve chamber and the second valve chamber are arranged so as to partially overlap the pump chamber in the axial direction.   5. The washer device according to claim 3, wherein the tank wall in which the insertion hole is provided is provided by retracting a predetermined amount toward the inside of the washer tank.

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