JP2006291776A - Pump device and washer pump device for vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a pump device which can be mounted on both of a vehicle provided with a polarity alternating mechanism of an electric power source for rotating a motor in regular and reverse direction on a pump device, and a vehicle provided with the same out of the pump device. <P>SOLUTION: In the pump device 20 delivering washing fluid 4 from a delivery port 21a or a delivery port 21b by regular/reverse rotation of the motor 22, a relay adapter unit 50 including a first connector part 51 from which input terminals 51b, 51c corresponding to regular/reverse rotation of the motor 22 and a electric power supply terminal 51a are led out, and to which an external connector 3 is attached, a relay circuit board 53 alternating connection of the electric power supply terminal 51a between to an output terminal 52a corresponding to regular rotation of the motor 22 and to an output terminal 52b corresponding to reverse rotation of the motor 22 based on input to the input terminals 51b, 51c and a second connector part 52 mounted to the connector part 28 and connecting the output terminals 52a, 52b to a positive and a negative electricity supply terminals 28a, 28b of the connector part 28 is provided. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a pump device and a vehicle washer pump device, and more particularly to a pump device having two discharge ports and a vehicle washer pump device including the pump device.

  Conventionally, what is called a double outlet pump is known as a pump device applied to a vehicle washer pump device (see, for example, Patent Document 1). This pump device is configured to be able to selectively supply the cleaning liquid to the front window washer nozzle or the rear window washer nozzle via the valve device by rotating the impeller forward or reverse by a motor capable of rotating forward and reverse. Has been. In such a double outlet pump, the motor is rotated forward or backward by switching the polarity of the current supplied to the motor in reverse.

Japanese Patent Laying-Open No. 2004-197581 (page 5-8, FIG. 1-3)

  However, the mechanism for reversing and switching the polarity of the power supply in such a double outlet pump differs depending on each vehicle manufacturer. That is, the type that switches the polarity by the polarity reversing switching mechanism arranged on the operation switch side of the vehicle and the type that switches the polarity by incorporating a relay circuit as a polarity switching mechanism on the pump side. Things are mixed. Therefore, the pump supply manufacturer has to prepare two types of pump devices as a double outlet pump, a type that does not have a polarity switching relay circuit and a type that incorporates a polarity switching relay circuit. Since two types of pump devices must be prepared in this way, it is difficult to standardize parts, resulting in an increase in the number of parts and complicated parts management, resulting in high costs. was there.

  In view of the above problems, an object of the present invention is to assemble a power source polarity switching mechanism for rotating a motor forward and reverse to both a vehicle provided in the pump device and a vehicle provided outside the pump device. It is an object of the present invention to provide a possible pump device and a vehicle washer pump device using the pump device.

  According to the present invention, the subject has a connector portion from which a positive and negative power supply terminal for supplying power to a motor disposed in a motor chamber is derived, and corresponds to the polarity of a power supply that supplies power to the positive and negative power supply terminals. The motor is rotated forward or backward, and the impeller disposed in the pump chamber is rotated forward or reverse according to the forward or reverse rotation of the motor, so that the suction port is moved from the suction port to the pump chamber according to the forward or reverse rotation of the impeller. In the pump device that discharges the sucked liquid from the first discharge port or the second discharge port, a first connector portion from which an input terminal corresponding to normal rotation or reverse rotation of the motor and an external power supply terminal are derived, Based on the input to the input terminal corresponding to forward rotation or reverse rotation, the polarity switching for switching the connection of the external power supply terminal to either the output terminal corresponding to forward rotation of the motor or the output terminal corresponding to reverse rotation is performed. A circuit part, an output terminal corresponding to the forward rotation of the motor and an output terminal corresponding to the reverse rotation are derived, and are attached to the connector part to connect the output terminal to the positive and negative power supply terminals of the connector part. This is solved by providing a polarity switching adapter having a connector portion.

As described above, in the pump device of the present invention, the polarity of the current supplied to the motor is reversed and the motor is rotated forward or backward, and the rotation direction of the impeller is changed to selectively discharge liquid from the two discharge ports. In the case of adopting the double outlet pump, when the mechanism for switching the polarity is not provided on the switch side of the vehicle, for example, the second connector portion of the polarity switching adapter is attached to the connector portion of the pump device. At the same time, by attaching a vehicle-side external connector to the first connector portion of the polarity switching adapter, the polarity can be switched on the pump device side without having a mechanism for switching the polarity inside the pump device. .
On the other hand, for example, when a mechanism for switching the polarity is provided on the switch side of the vehicle, the polarity switching adapter is removed and the external connector is directly connected to the connector portion. Switching can be performed. Thereby, it is possible to share the pump device itself without changing it, and it is possible to standardize the pump device.

  A first inlet and a second inlet communicating with the first outlet and the second outlet; and a first exhaust communicating with the first inlet and the second inlet via a valve chamber. Based on the pressure difference between the outlet and the second outlet, and the liquid introduced in the valve chamber and introduced from the first inlet and the second inlet, the first inlet and the first outlet, or It is preferable to provide a valve device having a valve body that closes either one of the second introduction port and the second discharge port and communicates the other.

  Thus, the valve device is operated based on the pressure difference between the liquids introduced from the first inlet and the second inlet by the valve device, and either the first outlet or the second outlet is closed. Since the other communicates with the first introduction port and the second introduction port, the pump device is configured so that both the first discharge port and the second discharge port are at positive pressure depending on the rotation direction of the impeller, for example, a centrifugal pump. Even if it exists, the discharge port can be switched alternatively depending on the degree difference.

  Further, specifically, the valve device is configured such that the first introduction port and the second introduction port are detachably connected to each of the first discharge port and the second discharge port in a liquid-tight state. be able to. Thus, since the valve device is configured to be detachable, the valve device can be easily replaced when there is a problem such as poor responsiveness of the valve body of the valve device. Further, the mold structure for molding can be made simple and small.

  The valve device is preferably integrally formed so that the valve chamber communicates with the pump chamber. As described above, when the valve chamber of the valve device is integrally formed with the pump body so as to communicate with the pump chamber, there is no defective mounting of the valve device to the pump body, and it is inadvertently disconnected when an external force is applied. This is preferable because it does not occur.

  Moreover, it is preferable that the polarity switching adapter has a holder portion that engages with the valve device. If comprised in this way, in the mounting state to the connector part of a polarity switching adapter, since a holder part is also hold | maintained at the valve apparatus, the external force when an external connector is mounted | worn with the dead weight of a polarity switching adapter, or a 1st connector part For example, the orientation of the polarity switching adapter can be stably held so as not to apply stress to the mounting portions (the power feeding terminal and the output terminal) of the connector portion and the second connector portion.

Further, the connector portion has a connector housing surrounding the derived power supply terminal, and the connector housing is formed with a first engagement portion along a mounting direction of the second connector portion, The second connector portion is formed with a second engagement portion that engages with the first engagement portion, and when the second connector portion is attached to the connector portion, It is preferable that the mounting state between the polarity switching adapter and the connector portion is maintained by the engagement of the second engaging portion.
By engaging the first engagement portion formed in the connector housing and the second engagement portion formed in the second connector portion, the mounting portion of the connector portion and the second connector portion can be held more firmly. Even when the valve device is built in and the polarity switching adapter cannot be held by the valve device, or when the polarity switching adapter can be held by the valve device, the power supply terminal and the output terminal should not be stressed. The attitude of the polarity switching adapter can be stably maintained.

  The mounting direction of the connector section and the second connector section of the polarity switching adapter is substantially the same as the mounting direction of the first connector section of the polarity switching adapter and the external connector section mounted on the first connector section. By doing so, the force receiving direction when connecting the connector part, polarity switching adapter, and external connector can be set in one direction, so that deformation or stress such as bending occurs in each terminal against the force in that one direction. It is easy to set the derivation direction so as not to exist.

  In the polarity switching adapter, it is preferable that the first connector portion is disposed on one side of the mounting direction with respect to the polarity switching circuit portion, and the second connector portion is disposed on the other side. With this configuration, when the input terminal of the first connector unit is electrically connected to the output terminal of the second connector unit via the polarity switching circuit unit, the electrical routing is performed on both sides of the polarity switching circuit (substrate). Therefore, electrical wiring can be easily performed. In addition, the electric wiring from both sides can be easily routed from one side of the polarity switching circuit portion (the substrate) to the other side by penetrating the substrate. Furthermore, the force at the time of mounting the connector on the input terminal and the output terminal can be received by the polarity switching circuit (substrate).

In addition, the pump device, a washer tank that stores the liquid and to which the pump device is attached, a front nozzle that injects liquid into the front window of the vehicle, a rear nozzle that injects liquid into the rear window of the vehicle, And a command switch that commands the pump device to inject liquid from the front nozzle or the rear nozzle. The pump device applies the command to the front nozzle or the rear nozzle based on a command from the command switch. Alternatively, the vehicle washer pump device can be configured to supply liquid.
With this configuration, when the polarity switching mechanism is provided on the switch side of the vehicle, for example, the polarity switching adapter is removed and the external connector is directly connected to the connector portion of the pump device, thereby Can be configured. Further, when the polarity switching mechanism is not provided on the switch side of the vehicle, for example, the apparatus is configured by connecting the external connector to the first connector portion of the polarity switching adapter while the polarity switching adapter is attached. be able to. Thereby, it is possible to share the pump device itself without changing it, and it is possible to standardize the pump device.

  According to the pump device of the present invention, the polarity switching mechanism of the power source for rotating the motor forward and backward corresponds to the assembly to both the vehicle disposed in the pump device and the vehicle disposed outside the pump device. It is possible to standardize the pump device.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings. In addition, the members, arrangements, and the like described below do not limit the present invention, and it is needless to say that various modifications can be made in accordance with the spirit of the present invention.
1 to 6 relate to one embodiment of the present invention, FIG. 1 is an overall configuration diagram of a vehicle washer pump device, FIG. 2 is an explanatory diagram of the pump device, FIG. 3 is a sectional explanatory diagram of the pump device, 4 is a cross-sectional view taken along the line AA of FIG. 3, FIG. 5 is a cross-sectional view of the main part of the pump device, and FIG. 6 is an electrical configuration diagram of the washer pump device.
7 to 9 relate to another embodiment of the present invention, FIG. 7 is a cross-sectional explanatory view of the pump device, FIG. 8 is a cross-sectional explanatory view of the valve device of FIG. 7, and FIG. It is.

Hereinafter, an embodiment in which the present invention is embodied in a vehicle washer pump device (pump device) will be described. The pump device of the present invention is not limited to a vehicle washer pump device, and can be applied to a double outlet pump in general having two discharge ports.
As shown in FIG. 1, the vehicle washer pump device S of this example includes a washer tank 10 installed at a predetermined position in the engine room of the vehicle 1, a pump device 20 attached to the washer tank 10, and the vehicle 1. The main components are a front nozzle 12 for injecting the cleaning liquid 4 to the front window 2 a, a rear nozzle 13 for injecting the cleaning liquid to the rear window 2 b, and an operation (command) switch 15 disposed in the vehicle 1. In the vehicle washer pump device S of this example, the pump device 20 selectively injects the cleaning liquid 4 from the front nozzle 12 or the rear nozzle 13 by operating the operation switch 15. Further, the pump device 20 and the front nozzle 12 and the rear nozzle 13 are respectively connected by a pipe 16.
As shown in FIG. 2, the washer tank 10 of this example accommodates therein a cleaning liquid (liquid) 4 for cleaning the front window 2 a and the rear window 2 b of the vehicle 1, and is provided on the upper wall portion 11. By removing the injection cap 11a, the cleaning liquid 4 can be injected from the injection port.

As shown in FIG. 2, the pump device 20 of the present example mainly includes a pump body 21, a valve device 30 that is detachably connected to the pump body 21 in a liquid-tight state, and a relay adapter unit (polarity switching adapter) 50. As a component.
The pump device 20 of this example is fixed via a grommet so that the intake hole 29 b side of the pump body 21 is disposed in the washer tank 10. The relay adapter unit 50 of this example has a first connector portion 51 and a second connector portion 52, the first connector portion 51 is attached to the external connector 3, and the second connector portion 52 is a connector of the pump main body 21. Mounted on the part 28. As will be described later, the relay adapter unit 50 according to the present embodiment applies the voltage applied from the external connector 3 by the built-in relay circuit (polarity switching circuit) substrate 53 based on the switch operation of the operation switch 15. It is possible to switch the forward / reverse rotation direction of the motor 22 in the pump body 21 by switching the polarity. In this example, the polarity switching circuit is configured using a relay circuit. However, the configuration is not limited thereto, and the polarity switching circuit may be configured using an FET.

As shown in FIG. 3, the pump main body 21 of the present example has a motor 22, an impeller 23 fixed to the rotating shaft 22 a of the motor 22, and a motor chamber 24 a formed therein that houses the motor 22. A bottom cylindrical housing 24, a pump chamber cover 29 that is attached to the bottom of the housing 24 and forms a pump chamber 29g with the housing 24, and is attached so as to close the opening of the substantially bottomed cylindrical housing 24. The end plate 27 is a main component.
The motor 22 rotates the rotating shaft 22a forward and backward according to the polarity of the power supply voltage supplied from the outside. That is, when an external power supply voltage is applied so that one power supply (input) terminal of the motor 22 has a positive potential with respect to the other power supply (input) terminal, the motor 22 rotates in the forward direction, When an external power supply voltage is applied so that the power supply (input) terminal has a negative potential with respect to the other power supply (input) terminal, the motor 22 rotates in the reverse direction. In this example, the power supply (input) terminal on the negative potential side is grounded to the vehicle 1 outside the pump device 20.

The housing 24 is formed in a substantially bottomed cylindrical shape, and the inner space of the substantially bottomed cylindrical shape is a motor chamber 24a. The housing 24 is formed with a flow path 25a and a flow path 25b (see FIG. 4) along the longitudinal direction outside the motor chamber 24a in the radial direction. One end of each of the flow paths 25 a and 25 b is open on the bottom surface of the housing 24 on the pump chamber cover 29 side, and the other end side is provided in a cylindrical shape so as to protrude outward in the radial direction of the housing 24. It communicates with the supply pipes 26a and 26b. The openings formed at the ends of the feed pipes 26a and 26b are a discharge port 21a (first discharge port) and a discharge port 21b (second discharge port), respectively. The flow path 25a and the flow path 25b are arranged adjacent to each other between the inner and outer peripheral surfaces of the substantially bottomed cylindrical housing 24.
A through hole 24b is formed at the bottom of the housing 24 on the pump chamber cover 29 side, and communicates the inside of the motor chamber 24a with the pump chamber cover 29 side. And the motor 22 is accommodated in the motor chamber 24a so that the front-end | tip part of the rotating shaft 22a is sealed, and penetrates the through-hole 24b and protrudes outside. The impeller 23 is fixed to the protruding tip portion of the rotating shaft 22a.

  The end plate 27 includes a main body portion 27a that closes the opening of the housing 24, and a connector portion 28 that protrudes from the main body portion 27a in the axial direction of the rotation shaft 22a and is inclined in the vehicle vertical direction. The connector portion 28 is held such that positive and negative power supply terminals 28 a and 28 b for supplying a power supply voltage to the motor 22 are led out along the extending direction of the connector portion 28, and these are connectors extending from the end plate 27. Surrounded by the housing 28c. The extending direction of the connector part 28 is substantially parallel to the mounting direction C of the connector part 28 and the second connector part 52. The power supply terminals 28a and 28b are connected to a brush device (not shown) in the motor 22, respectively. The power supply terminals 28a and 28b in this example are male contacts.

The pump chamber cover 29 is attached to one end side (bottom outer surface) of the housing 24. As shown in FIG. 4, the pump chamber cover 29 includes an impeller receiving recess 29a that is recessed in a substantially circular shape so as not to prevent rotation of the impeller 23, and a flow path 25a from a predetermined angular position of the impeller receiving recess 29a. Communication recesses 29c and 29d are formed so as to be connected to the opening on one end side of 25b. Further, as shown in FIG. 3, an intake hole 29 b penetrating to the outside is formed in the center of the bottom of the impeller accommodating recess 29 a of the pump chamber cover 29. In the pump device 20 of this example, a pump chamber 29g is formed by the impeller accommodating recess 29a and one end surface of the housing 24, and outflow passages 29e and 29f are formed by the communication recesses 29c and 29d and one end surface of the housing. Further, in this example, the outflow path 29e and the flow path 25a, and the outflow path 29f and the flow path 25b constitute communication paths 20a and 20b that connect the pump chamber 29g and the discharge ports 21a and 21b, respectively.
As shown in FIG. 4, the pump chamber 29 g is formed in a substantially circular shape when viewed from the axial direction of the impeller 23. Of the communication passages 20a and 20b, the outflow passages 29e and 29f extending in a substantially tangential direction from the pump chamber 29g are closer to each other toward the valve device 30 (upper side in FIG. 4) and are closer to each other. .

As shown in FIG. 5, the valve device 30 of this example includes divided housings 30 </ b> A and 30 </ b> B that constitute the valve housing, and a valve body 40.
The divided housing 30A is for forming a valve chamber 30Ac communicating with the inlet 30Aa (first inlet) and the outlet 30Ab (first outlet). The divided housing 30B is for forming a valve chamber 30Bc communicating with the inlet 30Ba (second inlet) and the outlet 30Bb (second outlet). The valve body 40 is interposed so as to partition (partition) the valve chamber 30Ac and the valve chamber 30Bc, and opens either the discharge port 30Ab or the discharge port 30Bb due to a pressure difference between the valve chamber 30Ac and the valve chamber 30Bc. It is for setting the state and closing the other.

Specifically, the divided housings 30A and 30B include main body portions 31a and 31b, outer extending portions 32a and 32b, inflow cylindrical portions 33a and 33b, inner extending cylindrical portions 34a and 34b, and outer extending cylindrical portions 35a and 35b.
The main body portions 31 a and 31 b are formed in a substantially bottomed cylindrical shape, and are disposed in a direction substantially orthogonal to the rotation shaft 22 a of the motor 22. The outward extending portions 32a and 32b are extended radially outward from the opening side end portions of the main body portions 31a and 31b. The inflow cylinders 33a and 33b are formed to project from the outer circumferences (circumferential surfaces) of the main body parts 31a and 31b to the outer side in the radial direction, and the outer and inner sides of the main body parts 31a and 31b (in the valve chamber 30Ac and valve chamber, respectively) 30Bc) to communicate with each other.
The inwardly extending cylindrical portions 34a and 34b are formed so as to project in a cylindrical shape from the side surfaces of the main body portions 31a and 31b in the inner direction (the valve chamber 30Ac direction and the valve chamber 30Bc direction, respectively) along the longitudinal direction of the main body portions 31a and 31b. ing. The outwardly extending cylindrical portions 35a and 35b are formed so as to protrude in a cylindrical shape from the side surfaces of the main body portions 31a and 31b along the longitudinal direction of the main body portions 31a and 31b in the outer direction (reverse to the inwardly extending cylindrical portions 34a and 34b, respectively). ing. The inwardly extending cylinder part 34a and the outwardly extending cylinder part 35a, and the inwardly extending cylinder part 34b and the outwardly extending cylinder part 35b are in communication with each other on the same straight line.

  In this example, the openings formed at the tips of the inflow cylinders 33a and 33b are the introduction ports 30Aa and 30Ba, respectively, and the openings formed at the tips of the outer extension cylinders 35a and 35b are the discharge ports 30Ab and 30Bb, respectively. is there. Moreover, in this example, the opening formed in the front-end | tip of inwardly extending cylinder part 34a, 34b is valve seat part 36a, 36b which contact | abuts the valve body 40. FIG.

  The valve body 40 of this example is formed in a substantially disk shape by an elastic material such as a rubber material. The valve body 40 has a thick outer peripheral edge portion 41, an annular thin wall portion 42 formed radially inside the outer peripheral edge portion 41, and a disc shape formed at the center of the thin wall portion 42. A medium-wall valve body 43 is integrally formed.

  The split housings 30A and 30B are assembled by fitting and fixing fitting portions (not shown) of the extension portions 32a and 32b so that the valve bodies 40 are interposed with the opening sides facing each other. At this time, the outer peripheral edge 41 of the valve body 40 is liquid-tightly held by the extended portions 32a and 32b. Thereby, the inside of the main body portions 31a and 31b of the divided housings 30A and 30B is partitioned by the valve body 40, and the valve chamber 31Ac and the valve chamber 31Bc are formed. At this time, the inflow tube portions 33a and 33b are juxtaposed so as to protrude close to each other, and can be fitted to the feed pipes 26a and 26b, respectively. The valve device 30 is attached to the pump main body 21 by fitting the inflow cylinder portions 33a and 33b to the feed pipes 26a and 26b in a liquid-tight manner so as to be detachable.

  As shown in FIG. 3, the relay adapter unit 50 of this example includes a first connector part 51, a second connector part 52, a relay circuit board 53 as a polarity switching circuit part, and a main body that holds the relay circuit board 53. A portion 54 and a holder portion 55 extending from the main body portion 54. The first connector portion 51 is formed to extend from one end side of the hollow main body portion 54, and the second connector portion 52 is formed to extend from the other end side of the main body portion 54.

  The holder portion 55 has engagement pieces 55a and 55b whose inner side surfaces are substantially semicircular, and as shown in FIG. 4, these are the outer peripheral surfaces of the main body portions 31a and 31b of the divided housings 30A and 30B, respectively. It is designed to engage. Thereby, by attaching the second connector part 52 to the connector part 28, the holder part 55 is engaged with and held by the valve device 30. Then, due to the engagement of the holder portion 55, the attachment portion of the connector portion 28 and the second connector portion 52 (power supply) due to the weight of the relay adapter unit 50 or the external force when the external connector 3 is attached to the first connector portion 51. The posture of the relay adapter unit 50 can be stably maintained without applying stress to the terminals 28a and 28b and the output terminals 52a and 52b).

The external connector 3 attached to the first connector 51 includes a power supply terminal 3a, an input terminal 3b for jetting cleaning liquid to the front window 2a, and an input terminal 3c for jetting cleaning liquid to the rear window 2b (FIG. 6). The power supply terminal 3 a is connected to the battery B of the vehicle 1. The input terminals 3b and 3c are grounded to the vehicle body by operating the switch 15a for injecting the cleaning liquid to the front window 2a of the operation switch 15 and the switch 15b for injecting the cleaning liquid to the rear window 2b, respectively. The power supply terminal 3a and the input terminals 3b and 3c in this example are female contacts.
Then, a power supply terminal 51a and input terminals 51b and 51c which are male contacts connected to the power supply terminal 3a and the input terminals 3b and 3c, respectively, are led out to the first connector portion 51 to which the external connector 3 is attached. These are surrounded by a connector housing 51 d extending from the main body 54.

Further, the connector part 28 to which the second connector part 52 is attached includes the positive and negative power supply terminals 28a and 28b as described above. Corresponding to these, female contact output terminals 52 a and 52 b are led out to the second connector portion 52, and these are surrounded by a connector housing 52 c extending from the main body portion 54.
The power supply terminal 51a, the input terminals 51b and 51c, and the output terminals 52a and 52b are connected to the relay circuit board 53, respectively. The relay circuit board 53 is configured by arranging other electrical components such as a relay coil 53b and switches 53A and 53B on a board 53a. The power supply terminal 51a, the input terminals 51b and 51c, and the output terminals 52a and 52b are attached so as to be led out substantially perpendicular to the plane of the substrate 53a by soldering. This lead-out direction is substantially parallel to the mounting direction C (insertion / removal direction) of the first connector portion 51 and the second connector portion 52.
In the relay circuit board 53 of this example, the base ends of the power supply terminals 51a, the input terminals 51b and 51c, and the output terminals 52a and 52b are directly fixed to the board 53a by solder or the like. It may be configured to be connected to the wiring pattern of the substrate 53a via The relay circuit board 53 of this example is configured such that the contacts of the switches 53A and 53B are switched when the input terminals 51b and 51c are grounded.

  In the relay adapter unit 50 of this example, the first connector portion 51 and the external connector 3 are attached in the same direction, and the second connector portion 52 and the connector portion 28 are attached in substantially the same direction. The extending direction from the main body part 54 of the part 51 and the second connector 52 is set. Thus, in the relay adapter unit 50 of this example, the mounting direction of the external connector 3 and the first connector portion 51 and the mounting direction of the second connector portion 52 and the connector portion 28 are configured to be substantially the same. The direction of receiving this mounting force when mounting each connector can be one direction. Thereby, it is possible to prevent the terminal of each connector portion from being subjected to deformation such as bending or stress.

  Further, in the relay adapter unit 50 of the present example, the first connector portion 51 and the second connector portion 52 are formed on one side and the other side of the main body portion 54 having the relay circuit board 53, respectively. Since the power supply terminal 51a, the input terminals 51b and 51c of the 51, and the output terminals 52a and 52b of the second connector portion 52 can be easily electrically wired from both sides of the relay circuit board 53, electrical handling is easy. is there. Further, the wiring may be routed from one side to the other side through the relay circuit board 53. In addition, by arranging the terminals on both sides of the relay circuit board 53 in this way, an external force applied when the connector portions are mounted can be received by the relay circuit board 53.

Next, the operation of the vehicle washer pump device S of this example will be described.
As shown in FIG. 6, the positive and negative power supply terminals 28a and 28b of the motor 22 are connected to the terminal a of the switch 53A and the terminal d of the switch 53B via output terminals 52a and 52b, respectively. The switching terminals b and c of the switch 53A are connected to the input terminal 51c and the power supply terminal 51a, respectively. The switch 53A normally connects the terminal a and the switching terminal c. On the other hand, the switching terminals e and f of the switch 53B are connected to the input terminal 51b and the power supply terminal 51a, respectively. The switch 53B normally connects the terminal d and the switching terminal e.
In this state, as shown in FIG. 6A, when the switch 15a of the operation switch 15 is operated, the power supply terminals 3a and 51a, the switching terminal c and the terminal a of the switch 53A, the output terminal 52a, A power supply voltage is applied to the power supply terminal 28 a of the motor 22. On the other hand, the power supply terminal 28b of the motor 22 is grounded via the output terminal 52b, the terminal d of the switch 53B, the switching terminal e, the input terminals 51b and 3b, and the switch 15a. Thereby, a closed circuit for rotating the motor 22 forward is formed, and the motor 22 rotates forward.

When the motor 22 rotates forward and the rotating shaft 22a and the impeller 23 rotate forward (counterclockwise rotation in FIG. 4), the cleaning liquid (liquid) in the washer tank 10 is sucked from the intake hole 29b and sucked cleaning liquid. Is supplied to the communication passage 20a with a large positive pressure. At this time, a small positive pressure is also applied to the communication passage 20b. Thereby, the pressure in the valve chamber 30Ac of the valve device 30 communicating with the communication passage 20a becomes a large positive pressure, and the pressure in the valve chamber 30Bc communicated with the communication passage 20b becomes a small positive pressure.
The valve main body 43 of the valve body 40 is pressed and contacted with the valve seat portion 36b on the valve chamber 30Bc side (divided housing 30B side) due to the difference in internal pressure between the valve chamber 30Ac and the valve chamber 30Bc, and the discharge port 30Bb is closed. It is said.

  At this time, since the discharge port 30Ab is opened, the cleaning liquid is discharged only from the discharge port 30Ab. As a result, the cleaning liquid is sprayed only to the front window 2a through the front nozzle 12. Thus, by the forward rotation of the motor 22, the pump device 20 pumps the cleaning liquid in the washer tank 10 to the front nozzle 12, and the cleaning liquid is jetted from the front nozzle 12 to the front window 2a.

  As shown in FIG. 6B, when the switch 15b of the operation switch 15 is operated, the battery B is connected via the power supply terminals 3a and 51a, the relay coil 53b, the input terminals 51c and 3c, and the switch 15b. Grounded. Thereby, a current flows through the relay coil 53b, and the contacts of the switches 53A and 53B are switched. That is, the switch 53A is connected to the terminal a and the switching terminal b, and the switch 53B is connected to the terminal d and the switching terminal f. Then, the power supply voltage is applied to the power supply terminal 28b of the motor 22 through the power supply terminals 3a and 51a, the switching terminal f and the terminal d of the switch 53B, and the output terminal 52b. On the other hand, the power supply terminal 28a of the motor 22 is grounded via the output terminal 52a, the terminal a of the switch 53A, the switching terminal b, the input terminals 51c and 3c, and the switch 15b. Thereby, a closed circuit for reversely rotating the motor 22 is formed, and the motor 22 rotates reversely.

When the motor 22 rotates in the reverse direction and the rotating shaft 22a and the impeller 23 rotate in the reverse direction (clockwise rotation in FIG. 4), the cleaning liquid in the washer tank 10 is sucked from the intake hole 29b, and the sucked cleaning liquid is connected to the communication path 20b. Is supplied at a large positive pressure. At this time, a small positive pressure is also applied to the communication passage 20a. Thereby, the pressure in the valve chamber 30Bc of the valve device 30 communicating with the communication path 20b becomes a large positive pressure, and the pressure in the valve chamber 30Ac communicated with the communication path 20a becomes a small positive pressure.
The valve main body 43 of the valve body 40 is pressed against the valve seat 30a on the valve chamber 30Ac side (divided housing 30A side) due to the difference in internal pressure between the valve chamber 30Ac and the valve chamber 30Bc, and the discharge port 30Ab is closed. It is said.

At this time, since the discharge port 30Bb is opened, the cleaning liquid is discharged only from the discharge port 30Bb. As a result, the cleaning liquid is sprayed only to the rear window 2b through the rear nozzle 13. Thus, by reverse rotation of the motor 22, the pump device 20 pumps the cleaning liquid in the washer tank 10 to the rear nozzle 13, and the cleaning liquid is jetted from the rear nozzle 13 to the rear window 2b.
As described above, the relay circuit board 53 of the present example switches the polarity of the power supply voltage applied to the motor 22 when the input terminals 51b and 51c are grounded by the operation of the switch 15. Can be switched.

As described above, in the pump device 20 of this example, the external connector 3 on the vehicle side includes the power supply terminal 3a, the input terminal 3b for injecting the cleaning liquid to the front nozzle 12, and the input terminal 3c for injecting the cleaning liquid to the rear nozzle 13. (That is, when the polarity switching mechanism of the power source for rotating the motor 22 in the forward and reverse directions is not provided on the vehicle side and is required on the pump device 20 side), the external connector 3 is connected via the relay adapter unit 50. Is connected to the connector portion 28, the motor 22 can be rotated forward or backward based on the operation of the operation switch 15.
Further, in the pump device 20 of this example, when the external connector on the vehicle side has only positive and negative power supply terminals (that is, the power source polarity switching mechanism for rotating the motor 22 forward and backward is on the vehicle side, When it is not necessary on the pump device 20 side), the relay adapter unit 50 can be removed and the external connector can be directly attached to the connector portion 28. One of the positive and negative power supply terminals of the external connector is connected to the battery B of the vehicle based on the operation of the operation switch, and the other is grounded to the vehicle body. Accordingly, one of the positive and negative power supply terminals 28a and 28b of the motor 22 is connected to the vehicle battery B and the other is grounded to the vehicle based on the operation of the operation switch. Thereby, the motor 22 can be rotated forward or backward.

  As described above, the pump device 20 of this example is disposed outside the vehicle and the pump device 20 (for example, in the operation switch) in which the polarity switching mechanism of the power source for rotating the motor 22 forward and backward is arranged in the pump device 20. It is possible to easily cope with assembly on both sides of the installed vehicle. Thereby, it is possible to share parts for manufacturing the pump device 20 for two types of vehicles, and it is possible to reduce the cost.

The present invention may be modified as follows. In addition, the same code | symbol is attached | subjected to the same component as the said embodiment, and the overlapping description is abbreviate | omitted.
In the said embodiment, although the valve apparatus 30 of the pump apparatus 20 was the structure formed separately from the pump main body 21 and connected with the pump main body 21, it is not restricted to this, As shown in FIG. 30 may be configured integrally with the pump device 20. In the example of FIG. 7, the valve chambers 30Ac, 30Bc of the valve device 30 are integrally formed so as to communicate with the pump chamber 29g.
In the example of FIG. 7, the housing 24 is formed with a divided housing 24 c in the vicinity of the upper end portion on the opening side radially outward, and the upper portion of the end plate 27 is extended radially outward. 27b is formed. The divided housing 27b is formed to extend radially outward from the back surface side (motor 22 side) of the connector portion 28 extending upward in the right side in the drawing.

As shown in FIG. 8, the valve device 30 of this example is formed by fitting these divided housings 24c and 27b. In the valve device 30 of the present example, the valve chambers 40 are interposed between the divided housings 24c and 27b, so that valve chambers 30Ac and 30Bc are formed on both sides thereof.
In the pump device 20 of this example, when the second connector portion 52 of the relay adapter unit 50 is attached to the connector portion 28, the holder portion 55 formed in accordance with the outer shape of the valve device 30 is divided into the divided housing 24c, 27b is engaged. Thereby, the relay adapter unit 50 is attached so that the pump device 20 can support an external force or the like via the holder portion 55.

In the valve device 30 of the present example, the flow path 25a is communicated with the valve chamber 30Ac, and the communicating portions serve as the discharge port 21a and the introduction port 30Aa. In addition, a flow path 25b is communicated with the valve chamber 30Bc, and the communicating portion is a discharge port 21b and an introduction port 30Ba.
Two partition walls 24d and 27c protrude into the valve chambers 30Ac and 30Bc, respectively, and are formed so as to partition the valve chamber, and these tip portions are spaced apart from each other by a predetermined distance. . The valve chamber 30Ac is partitioned into an inner portion and an outer portion by two partition walls 24d, and the valve chamber 30Bc is partitioned into an inner portion and an outer portion by two partition walls 27c. And the front-end | tip part of the partition walls 24d and 27c is made into valve seat part 36a, 36b, respectively. The valve body 40 is movable between the valve seat portions 36a and 36b.
The introduction ports 30Aa and 30Ba communicate with the outer portions of the partition walls 24d and 27c, respectively. On the other hand, on the side surfaces of the divided housings 24c and 27b, cylindrical portions 37a and 37b communicating with the inner portions of the partition walls 24d and 27c are formed so as to protrude, and the end portions of the cylindrical portions 37a and 37b are the discharge ports 30Ab, It is 30Bb.

  Since the valve device 30 of this example is formed as described above, when the motor 22 rotates forward, the cleaning liquid 4 is pumped to the valve chambers 30Ac and 30Bc via the flow paths 25a and 25b. Since the internal pressure is higher in the flow path 25a, the internal pressure is higher in the valve chamber 30Ac than in the valve chamber 30Bc. The valve body 40 moves to the valve chamber 30Bc side due to the difference in internal pressure, and is pressed against the valve seat portion 36b. Thereby, the space between the inlet 30Ba and the outlet 30Bb is closed. On the other hand, since the introduction port 30Aa and the discharge port 30Ab are kept in communication with each other, the cleaning liquid 4 pumped from the pump chamber 29g passes through the introduction port 30Aa (discharge port 21a), the valve chamber 30Ac, and the discharge port 30Ab. It is supplied to the front nozzle 12 and injected into the front window 2a.

  On the other hand, when the motor 22 reversely rotates, the cleaning liquid 4 is pumped to the valve chambers 30Ac and 30Bc through the flow paths 25a and 25b. However, the internal pressure of the flow path 25b is higher than that of the flow path 25a. The valve chamber 30Bc has a higher internal pressure. The valve body 40 moves to the valve chamber 30Ac side due to the difference in internal pressure, and is pressed against the valve seat portion 36a. As a result, the space between the inlet 30Aa and the outlet 30Ab is closed. On the other hand, since the introduction port 30Ba and the discharge port 30Bb are kept in communication with each other, the cleaning liquid 4 pumped from the pump chamber 29g passes through the introduction port 30Ba (discharge port 21b), the valve chamber 30Bc, and the discharge port 30Bb. It is supplied to the rear nozzle 13 and injected into the rear window 2b.

  Moreover, in the said embodiment, although the relay adapter unit 50 had the holder part 55 which has the engagement pieces 55a and 55b engaged with the pump apparatus 20, it is not restricted to this and is comprised as shown in FIG. May be. That is, in the example of FIG. 9A, a guide holder 128 serving as a first engaging portion is formed in the connector housing 28c of the connector portion 28 up to the distal end portion. The guide holder 128 is formed with an insertion hole 128a having a substantially T-shaped cross section along the connecting direction. On the other hand, the second connector portion 52 is provided with a guide protrusion 52e as a second engaging portion having a substantially T-shaped cross section, which is inserted into the insertion hole of the guide holder 128, in parallel with the output terminals 52a and 52b. The power feeding terminals 28a and 28b and the output terminals 52a and 52b are extended to a position inside the connector housing 28c and the tip of the connector housing 52c.

  With such a configuration, when the second connector portion 52 is attached to the connector portion 28, the guide protrusion 52e is formed by the guide holder 128 at a position before the output terminals 52a and 52b begin to slidably contact the power feeding terminals 28a and 28b. After the guide protrusion 128e is guided by the guide holder 128 for a predetermined length, the output terminals 52a and 52b and the power supply terminals 28a and 28b start to be connected. In this way, the second connector portion 52 and the connector portion 28 are mounted while the guide protrusion 52e and the guide holder 128 are fitted. Thereby, it is possible to hold the relay adapter unit 50 in a state where it is securely attached by the pump device 20.

  Then, when the external connector 3 is inserted into the first connector portion 51 with the relay adapter unit 50 mounted on the pump device 20, or when the external connector 3, the relay adapter unit 50 and the pump device 20 are connected to the connector. When a prepared external force is applied, stress applied to the output terminals 52a and 52b and the power supply terminals 28a and 28b can be reduced.

Moreover, in addition to the holder part 55 of the said embodiment, you may provide the guide holder 128 and the guide protrusion 52e. If comprised in this way, mounting | wearing with the 2nd connector part 52 and the connector part 28 can be hold | maintained more firmly. 9, even when the valve device 30 is built in the pump body 21 and the holder portion 55 of the relay adapter unit 50 cannot be held by the valve device 30, the second connector portion 52 and The attachment with the connector portion 28 can be held more firmly.
The shape of the guide holder 128 and the guide protrusion 52e is not limited to the shape shown in FIG. 9A, and may be formed as shown in FIG. In the example of FIG. 9B, it is assumed that the guide holder 128 has an insertion hole 128a having a substantially circular cross section, and the guide protrusion 52e has a substantially circular shape in accordance with the insertion hole 128a.

In the example of FIG. 9, the guide protrusion 52e is formed to be connected to the side wall of the connector housing 52c. However, the guide protrusion 52e is not limited to this, and protrudes from the bottom in the same manner as the output terminal without being connected to the side wall. It may be formed.
In the example of FIG. 9, the second connector portion 52 is provided with the guide protrusion 52e as the second engagement portion, and the connector portion 28 is provided with the guide holder 128 as the first engagement portion. The second connector portion 52 may be provided with a guide holder as a second engaging portion, and the connector portion 28 may be provided with a guide protrusion as a first engaging portion.
Furthermore, in FIG. 9, although the example which provided the guide holder and the guide protrusion in order to make mounting | wearing with the 2nd connector part 52 and the connector part 28 more reliable was shown, not only this but the external connector 3 and 1st In order to make the mounting with the connector portion 51 more reliable, a guide holder and a guide projection may be provided on them.

  Moreover, although the said embodiment demonstrated the example which applied the pump apparatus 20 to the washer pump apparatus which pumps cleaning liquid with respect to the front nozzle 12 and the rear nozzle 13, it is not restricted to this, The pump apparatus of this invention is used for the head of a vehicle. You may apply to the pump apparatus for headlamp cleaners which wash | clean a lamp | ramp.

1 is an overall configuration diagram of a vehicle washer pump device according to an embodiment of the present invention. It is explanatory drawing of the pump apparatus of FIG. It is a cross-sectional explanatory drawing of the pump apparatus of FIG. FIG. 4 is a sectional view taken along line AA in FIG. 3. It is principal part sectional drawing of the pump apparatus of FIG. It is an electrical block diagram of the washer pump apparatus of FIG. It is sectional explanatory drawing of the pump apparatus which concerns on other embodiment of this invention. Cross-sectional explanatory drawing of the valve device in the pump device of FIG. It is explanatory drawing of the connector part which concerns on other embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Vehicle, 3 ... External connector, 3a ... Power supply terminal, 3b, 3c ... Input terminal,
10 ... Washer tank, 15 ... Operation switch, 16 ... Piping, 20 ... Pump device,
20a, 20b ... communication path, 21 ... pump body, 21a, 21b ... discharge port,
22 ... motor, 22a ... rotary shaft, 23 ... impeller, 24 ... housing,
24a, motor chamber, 24b, through hole, 24d, 27c, partition wall,
24c, 27b ... split housing, 25a, 25b ... flow path, 26a, 26b ... feed pipe,
27 ... End plate, 27a ... Body part, 28 ... Connector part,
28a, 28b ··· feeding terminals, 28c · connector housing, 29 · pump chamber cover,
29a ··· impeller receiving recess, 29b · intake hole, 29c and 29d · communication recess,
29e, 29f ... Outflow passage, 29g ... Pump chamber, 30 ... Valve device,
30A, 30B ... split housing, 30Aa, 30Ba ... inlet,
30Ab, 30Bb ... discharge port, 30Ac, 30Bc ... valve chamber,
31a, 31b ... body part, 32a, 32b ... extension part, 33a, 33b ... inflow cylinder part,
34a, 34b ... inwardly extending cylinder part, 35a, 35b ... outwardly extending cylinder part, 36a, 36b ... valve seat part,
37a, 37b: cylinder part, 40: valve body, 41: outer peripheral edge part, 42: thin part,
43 ... Valve body, 50 ... Relay adapter unit, 51 ... First connector,
51a... Power supply terminal (external power supply terminal), 51b and 51c.
51d Connector housing 52 Second connector portion 52a 52b Output terminal
52c connector housing 52e guide protrusion 53 relay circuit board
53a, substrate, 53b, relay coil, 54, body, 55, holder
55a, 55b ... engagement piece, 128 ... guide holder, 128a ... insertion hole,
a, d... terminal, b, c, e, f... switching terminal, S.

Claims (9)

Having a connector portion from which positive and negative power supply terminals for supplying power to a motor disposed in the motor chamber are derived, and rotating the motor forward or reverse depending on the polarity of the power source supplying power to the positive and negative power supply terminals; By rotating the impeller disposed in the pump chamber in the forward or reverse direction according to the forward or reverse rotation of the motor, the liquid sucked into the pump chamber from the suction port in accordance with the forward or reverse rotation of the impeller is supplied to the first discharge port or In the pump device that discharges from the second discharge port,
A first connector portion from which an input terminal corresponding to forward rotation or reverse rotation of the motor and an external power supply terminal are derived, and an input to an input terminal corresponding to forward rotation or reverse rotation of the motor; A polarity switching circuit unit that switches connection to either an output terminal corresponding to forward rotation of the motor or an output terminal corresponding to reverse rotation, an output terminal corresponding to forward rotation of the motor and an output terminal corresponding to reverse rotation are derived, A pump device comprising: a polarity switching adapter having a second connector portion attached to the connector portion for connecting the output terminal to a positive and negative power supply terminal of the connector portion. A first inlet and a second inlet communicating with each of the first outlet and the second outlet;
A first discharge port and a second discharge port respectively communicating with the first introduction port and the second introduction port via a valve chamber;
Based on the pressure difference between the liquids disposed in the valve chamber and introduced from the first inlet and the second inlet, the first inlet and the first outlet, or the second inlet and the The pump device according to claim 1, further comprising: a valve device having a valve body that closes one of the second discharge ports and communicates the other.   3. The valve device according to claim 2, wherein the first introduction port and the second introduction port are detachably connected to the first discharge port and the second discharge port in a liquid-tight state, respectively. Pumping equipment.   The pump device according to claim 2, wherein the valve device is integrally formed so that the valve chamber communicates with the pump chamber.   The pump device according to claim 2, wherein the polarity switching adapter has a holder portion that engages with the valve device. The connector portion has a connector housing that surrounds the periphery of the derived power supply terminal,
The connector housing is formed with a first engagement portion along the mounting direction of the second connector portion, and the second connector portion has a second engagement portion that engages with the first engagement portion. Formed,
When the second connector portion is attached to the connector portion, the attachment state between the polarity switching adapter and the connector portion is maintained by the engagement between the first engagement portion and the second engagement portion. The pump device according to any one of claims 1 to 5, wherein:   The mounting direction of the connector part and the second connector part of the polarity switching adapter is substantially the same as the mounting direction of the first connector part of the polarity switching adapter and the external connector part attached to the first connector part. The pump device according to any one of claims 1 to 6, wherein   The polarity switching adapter is characterized in that the first connector portion is disposed on one side in the mounting direction with respect to the polarity switching circuit portion, and the second connector portion is disposed on the other side. 8. The pump device according to 7. The pump device according to any one of claims 1 to 8,
A washer tank for storing liquid and having the pump device attached thereto;
A front nozzle for injecting liquid into the front window of the vehicle;
A rear nozzle for injecting liquid into the rear window of the vehicle;
A command switch that is disposed in a vehicle interior and commands the pump device to inject liquid from the front nozzle or the rear nozzle;
The vehicle washer pump device according to claim 1, wherein the pump device selectively supplies liquid to the front nozzle or the rear nozzle based on a command from the command switch.

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