JP2014137023A - Washer pump device for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To use a design of a double outlet pump in common in a single outlet pump using an impeller of a different discharge pressure in a rotating direction, while keeping assemblability in a vehicle.SOLUTION: In a washer pump 12, a front outlet 50 is disposed at a side opposite to a washer tank 14 with respect to an orthogonal line VL and at the other side in a rotating direction, of an impeller 42 with respect to a reference line L. Further the impeller 42 is rotated to one side in the rotating direction, and a cleaning fluid is supplied to the front outlet 50. The front outlet 50 is disposed in the same region with respect to a housing 22 for a double outlet pump using the impeller 42 and the washer pump 12, and the rotating directions of the impeller 42 in supplying the cleaning fluid to the front outlet 50 coincide with each other. Thus the single outlet pump can be commonalized with the double outlet pump in design while keeping assemblability in a vehicle.

Description

  The present invention relates to a vehicle washer pump device.

  In a vehicle washer pump device, a front outlet connected to a nozzle for cleaning a front windshield glass of a vehicle via a hose, and a rear connected to a nozzle for cleaning a rear windshield glass of the vehicle via a hose. For example, a so-called double outlet pump (see, for example, Patent Document 1 below). On the other hand, some vehicle washer pump devices include only a front outlet (so-called single outlet pump).

  Thereby, by mounting either a double outlet pump or a single outlet pump in a vehicle, it can respond to the specification of a vehicle. In consideration of the ease of assembly of the operator when assembling the hose to the vehicle washer pump device, the double outlet pump and the single outlet pump are set so that the position of the front outlet relative to the housing is matched. It is desirable to keep it.

JP 2012-44814 A

  By the way, in the vehicle washer pump device, the shape of the impeller may be set so that the pressure of the cleaning liquid discharged to the front outlet is larger than the pressure of the cleaning liquid discharged to the rear outlet. And, with the single outlet pump and the double outlet pump using such an impeller, when the rotation direction of the impeller when supplying the cleaning liquid to the front outlet is reversed, there is a problem that the design cannot be shared. is there. In other words, in this case, it is necessary to reverse the polarity of the vehicle harness for supplying current to the motor, or to reverse the polarity of the motor. For this reason, the types of motors and harnesses increase, and the design cannot be shared.

  In consideration of the above-described facts, the present invention aims to make the design common with the double outlet pump while maintaining the assembly property on the vehicle in the single outlet pump using the impeller having different discharge pressures in the rotation direction. An object of the present invention is to provide a vehicular washer pump device.

The vehicle washer pump device according to claim 1 is a housing having a motor housing portion for housing a motor, and extends from the housing to a washer tank side in a radial direction of a rotation shaft of the motor, An inlet that communicates with the pump chamber of the housing, and is provided in the pump chamber so as to be integrally rotatable with the rotary shaft, and is rotated to one side in the rotational direction and rotated to one side in the rotational direction by driving the motor. An impeller set higher than the discharge pressure when the discharge pressure at the time is rotated to the other side in the rotation direction;
The tube is formed at one location on the outer peripheral portion of the housing, and the inside is formed as a communication passage communicating with the pump chamber, and the extension direction of the inlet as viewed from the axial direction of the rotating shaft. The other side in the rotational direction of the impeller is disposed on the opposite side of the washer tank with respect to the orthogonal line passing through the axis of the rotating shaft and passing through the axis of the rotating shaft. And an outlet disposed on the side.

  According to the vehicular washer pump device of the first aspect, the housing includes the motor housing portion that houses the motor and the pump chamber. An inlet extends from the housing to the washer tank side in the radial direction of the rotating shaft of the motor, and the inside of the washer tank and the pump chamber communicate with each other. Further, a cylindrical outlet is formed in one place on the outer peripheral portion of the housing. The inside of the outlet is a communication passage, and the communication passage communicates with the pump chamber. That is, this vehicle washer pump device is configured as a so-called single outlet pump.

  Further, an impeller is disposed in the pump chamber, and the impeller is provided so as to be integrally rotatable on a rotation shaft of the motor. When the motor is driven, the impeller is rotated to one side in the rotation direction, and the liquid (cleaning liquid) in the pump chamber is discharged to the outlet side by the impeller. The shape or the like is set so that the discharge pressure when the impeller is rotated to one side in the rotation direction is higher than the discharge pressure when the impeller is rotated to the other side in the rotation direction.

  By the way, when the vehicle washer pump device is configured as a so-called double outlet pump using the impeller as described above, it is set to supply a liquid (cleaning liquid) having a high discharge pressure by the impeller to the front outlet. . That is, when the impeller rotates in one direction of rotation, the liquid (cleaning liquid) is supplied to the front outlet. Further, when the impeller rotates to the other side in the rotation direction, the liquid (cleaning liquid) is supplied to the rear outlet.

For this reason, the front outlet is orthogonal to the reference line passing through the axis of the rotating shaft along the direction of extension of the inlet, as viewed from the axial direction of the rotating shaft, and passing through the axis of the rotating shaft. Is disposed on the opposite side of the washer tank and on the other side in the rotational direction with respect to the reference line. The rear outlet is disposed on the opposite side to the washer tank with respect to the orthogonal line and on the one side in the rotational direction with respect to the reference line when viewed from the axial direction of the rotation shaft.

  Here, the outlet of the vehicular washer pump device according to claim 1 is perpendicular to a reference line passing through the axis of the rotary shaft along the extending direction of the inlet as seen from the axial direction of the rotary shaft. Is disposed on the opposite side of the washer tank with respect to the orthogonal line passing through the axis of the impeller, and is disposed on the other side in the rotational direction of the impeller with respect to the reference line.

That is, in the vehicle washer pump device according to claim 1 and the above-described double outlet pump, the front outlet is disposed in the same region (the same side with respect to the reference line) with respect to the housing, and the front outlet is arranged. The rotation direction of the impeller (motor rotating shaft) when supplying the cleaning liquid is the same direction.

  As described above, in the single outlet pump using the impeller as described above, it is possible to share the design with the double outlet pump while maintaining the assembly property when mounted on the vehicle.

  The vehicle washer pump device according to claim 2 is the vehicle washer pump device according to claim 1, wherein a peripheral wall portion is formed in an inner peripheral portion of the pump chamber except for the communication passage. A guide portion for guiding the liquid discharged by the impeller to the communication path side is formed at one end portion of the peripheral wall portion.

  According to the vehicular washer pump device of the second aspect, the peripheral wall portion is formed in the inner peripheral portion of the pump chamber except for the communication passage. And the guide part is formed in the one end part of a surrounding wall part, and the liquid (cleaning liquid) discharged with the impeller is guided to the communicating path side by a guide part. Thereby, the liquid (cleaning liquid) discharged by the impeller can be efficiently guided to the communication path side by the guide portion.

  The vehicle washer pump device according to claim 3 is the vehicle washer pump device according to claim 2, wherein the outlet intersects the extending direction of the inlet from the housing as seen from the axial direction of the rotating shaft. The guide portion is curved toward one side in the rotational direction of the impeller and the side in the projecting direction of the outlet as seen from the axial direction of the rotating shaft.

  In the vehicle washer pump device according to the third aspect, the outlet projects from the housing in a direction intersecting with the extending direction of the inlet as seen from the axial direction of the rotating shaft. The guide portion is curved toward one side in the rotation direction of the impeller and toward the protruding direction side of the outlet as viewed from the axial direction of the rotation shaft. For this reason, the liquid (cleaning liquid) discharged by the impeller is redirected to the communication path side by the guide portion and guided into the communication path. Thereby, even if it arrange | positions so that an outlet and an inlet may cross | intersect seeing from the axial direction of a rotating shaft, the liquid (cleaning liquid) in a pump chamber can be favorably guide | induced to the outlet side.

It is a sectional side view showing the state where the washer pump device for vehicles concerning this embodiment was attached to the washer tank. It is the bottom view seen from the lower side which shows the pump chamber of the vehicle washer pump apparatus shown by FIG. It is sectional drawing seen from the lower side which shows the case where the vehicle washer pump apparatus using the impeller shown in FIG. 2 is comprised as a double outlet pump. It is the bottom view seen from the lower side which shows an example which changed the position of the outlet for front shown by FIG.

  Hereinafter, a vehicle washer pump device (hereinafter referred to as a washer pump) 12 according to the present embodiment will be described with reference to the drawings. The washer pump 12 is configured as a centrifugal pump. As shown in FIG. 1, the washer pump 12 is configured as a part of the vehicle washer device 10, and the vehicle washer device 10 is applied to a vehicle (automobile). Further, the vehicle washer device 10 includes a washer tank 14 disposed in an engine room of the vehicle, and a washer pump 12 is disposed in the washer tank 14 in the vertical direction (see the directions of arrows A and B in FIG. 1). ) In the state of being aligned with the vertical direction of the vehicle.

  The washer pump 12 includes a pump body 20, and the pump body 20 includes a housing 22, a motor 28, and an impeller 42. The housing 22 is made of a resin material and is formed in a substantially cylindrical shape with the axial direction being the vertical direction. And the housing 22 is comprised including the motor accommodating part 24, the inlet 34, the pump chamber 38, and the outlet 50 for fronts as one outlet. That is, the washer pump 12 is configured as a so-called single outlet pump.

  The motor accommodating portion 24 forms an upper portion of the housing 22 (a portion on the arrow A direction side in FIG. 1) and is formed in a substantially bottomed cylindrical shape that is open upward. A bottom wall portion of the motor housing portion 24 is a partition wall 26, and an inlet 34 (described later) and a motor housing portion 24 are partitioned by the partition wall 26. A motor 28 is accommodated in the motor accommodating portion 24, and a rotating shaft 30 of the motor 28 penetrates the partition wall 26 and protrudes downward from the partition wall 26. A seal member is disposed in the shaft hole portion of the partition wall 26 through which the rotary shaft 30 penetrates to prevent the cleaning liquid from entering the motor accommodating portion 24.

  On the other hand, a connector cap 32 is fixed to the opening of the motor housing 24, and the opening of the motor housing 24 is closed by the connector cap 32. The connector cap 32 is integrally formed with a connector portion 32A. An electric current is supplied to the motor 28 by connecting an external connector (not shown) of the harness of the vehicle to the connector portion 32A.

  The inlet 34 is disposed on the lower side of the motor housing portion 24. The inlet 34 is formed in a substantially cylindrical shape, is disposed with its axial direction orthogonal to the rotation shaft 30 of the motor 28, and extends (projects) outward in the radial direction of the housing 22. The inner space of the inlet 34 is a suction hole 36, and the suction hole 36 extends to the lower side of the motor housing portion 24. Then, with the inlet 34 inserted into the washer tank 14, the housing 22 is assembled to the mounting hole of the washer tank 14 via a grommet (not shown). Further, as shown in FIG. 2, the distal end portion of the rotating shaft 30 is formed in a substantially D shape. Further, when viewed from the axial direction of the rotary shaft 30, the reference line passing through the axis of the rotary shaft 30 along the extending direction of the inlet 34 is L, and is orthogonal to the reference line L and is the rotary shaft. An orthogonal line passing through 30 axes is defined as VL.

  As shown in FIG. 1, the pump chamber 38 is disposed below the inlet 34 at the lower end portion of the housing 22. The pump chamber 38 is formed in a substantially circular shape in cross section (see FIG. 2) and is opened downward. An end cap (not shown) is fixed to the opening at the lower end of the housing 22, so that the pump chamber 38 is closed by the end cap. Further, a communication hole 40 is formed between the pump chamber 38 and the suction hole 36 of the inlet 34, and the communication hole 40 is disposed coaxially with the rotating shaft 30 of the motor 28, and the pump chamber 38. The inside of the inlet 34 and the inside of the inlet 34 (suction hole 36) communicate with each other at the center of the pump chamber 38. The rotating shaft 30 of the motor 28 described above extends to the pump chamber 38 through the inlet 34 and the communication hole 40, and the tip of the rotating shaft 30 is disposed in the pump chamber 38.

  Further, as shown in FIG. 2, an impeller 42 is accommodated in the pump chamber 38, and the impeller 42 is assembled to the tip end portion of the rotating shaft 30 of the motor 28 so as to be integrally rotatable. The impeller 42 has a plurality of (six in the present embodiment) blades 44, and the blades 44 extend outward in the radial direction of the rotating shaft 30. Thereby, by driving the motor 28, the impeller 42 is rotated to one side in the rotation direction (arrow C direction side in FIG. 2), and the cleaning liquid in the pump chamber 38 is discharged from the root side (inlet side) of the blade 44. It is discharged to the tip side (exit side) of the blade 44.

  The discharge pressure when the impeller 42 is rotated to one side in the rotational direction is higher than the discharge pressure when the impeller 42 is rotated to the other side in the rotational direction (arrow D direction side in FIG. 2). The shape of the blade 44 is set. Specifically, the blades 44 are formed in a circular arc that is convex from the root of the blade 44 to one side in the rotational direction.

  The front outlet 50 is formed in a substantially cylindrical shape and extends from the lower end portion of the housing 22 so that the axial direction intersects (substantially orthogonal) with the axial direction of the inlet 34 when viewed from the axial direction of the rotary shaft 30. (Protruding). Specifically, the root portion of the front outlet 50 is disposed on the outer peripheral portion of the housing 22 on the opposite side of the orthogonal line VL from the washer tank 14 and on the other side of the impeller 42 in the rotational direction of the reference line L. ing. That is, the root portion of the front outlet 50 is disposed within the range indicated by the arrow E in FIG.

The interior of the front outlet 50 is a discharge passage 52 as a communication passage, and the discharge passage 52 communicates with the above-described pump chamber 38. One end of the hose 16 is assembled to the front outlet 50, and a vehicle front nozzle (not shown) and the front outlet 50 are connected via the hose 16. When the impeller 42 is rotated to one side in the rotational direction, the cleaning liquid in the washer tank 14 is pumped to the front nozzle through the front outlet 50 and the hose 16 and directed from the front nozzle to the front windshield glass of the vehicle. The cleaning liquid is sprayed.

  In addition, a peripheral wall portion 54 is integrally formed on the inner peripheral portion of the pump chamber 38 described above, except for the discharge passage 52. That is, the peripheral wall portion 54 is formed in a substantially annular shape partially opened in the discharge passage 52 when viewed from the axial direction of the rotary shaft 30. Also, the thickness dimension of the peripheral wall portion 54 (projection dimension from the inner peripheral portion of the pump chamber 38) is set so as to become thinner from one end portion of the peripheral wall portion 54 toward one side in the rotational direction of the impeller 42, so-called involute shape. Is set to That is, the distance between the front end portion of the impeller 42 and the peripheral wall portion 54 is set to be narrowest at one end portion of the peripheral wall portion 54 and set to be widest at the other end portion of the peripheral wall portion 54. A guide portion 58 is formed at one end of the peripheral wall portion 54, and the guide portion 58 is on one side in the rotation direction of the impeller 42 and on the protruding direction side of the front outlet 50 when viewed from the axial direction of the rotary shaft 30. And is smoothly connected to the discharge passage 52.

  Next, the operation and effect of the present embodiment will be described.

  In the washer pump 12 configured as described above, the discharge pressure when the impeller 42 is rotated to one side in the rotation direction is higher than the discharge pressure when the impeller 42 is rotated to the other side in the rotation direction. The shape and the like are set. When the motor 28 is driven and the impeller 42 is rotated to one side in the rotational direction, the cleaning liquid in the washer tank 14 flows into the root side (inlet side) of the blade 44 of the impeller 42 through the communication hole 40. The cleaning liquid flowing between the blades 44 is discharged from the tip (outlet) of the blade 44 of the impeller 42. Further, the cleaning liquid discharged from the tip (exit) of the blade 44 of the impeller 42 is changed in direction by the guide portion 58 and flows into the discharge passage 52 of the front outlet 50 (see arrow F in FIG. 2). As a result, the cleaning liquid is pumped to the front nozzle through the hose 16 and sprayed from the front nozzle toward the front windshield glass.

  When the vehicle washer pump device is configured as a so-called double outlet pump using the impeller 42 as described above, this vehicle washer pump device (hereinafter referred to as a double outlet pump 60 for convenience) is shown in FIG. Configured to be. In FIG. 3, members that are configured in the same manner as the washer pump 12 of the present embodiment are denoted by the same reference numerals, and the cross-sectional view of the double outlet pump 60 viewed from below at the position of the pump chamber 38. Is shown.

  Specifically, the front outlet 50 and the rear outlet 62 are integrally formed on the housing 22 of the double outlet pump 60. The double outlet pump 60 is set so as to supply a cleaning liquid having a high discharge pressure by the impeller 42 to the front outlet 50. That is, when the impeller 42 rotates in one direction of rotation (arrow C direction in FIG. 3), cleaning liquid is supplied to the front outlet 50, and when the impeller 42 rotates in the other direction of rotation (arrow D direction in FIG. 3). The cleaning liquid is set to be supplied to the rear outlet 62. Therefore, the front outlet 50 is disposed on the opposite side of the washer tank 14 with respect to the orthogonal line VL and on the other side of the impeller 42 in the rotational direction with respect to the reference line L when viewed from the axial direction of the rotary shaft 30. The Further, the rear outlet 62 is disposed on the opposite side of the washer tank 14 with respect to the orthogonal line VL and on the one side in the rotational direction of the impeller 42 with respect to the reference line L when viewed from the axial direction of the rotary shaft 30. .

  A valve device 64 is fitted to the front outlet 50 and the rear outlet 62. The valve device 64 is integrally formed with a front discharge portion 66 and a rear discharge portion 68. The front discharge portion 66 and the rear discharge portion 68 are respectively provided in the front outlet 50 and the rear outlet 62. It is communicated within. The front discharge portion 66 is disposed on the opposite side of the washer tank 14 with respect to the orthogonal line VL and on the other side of the impeller 42 in the rotational direction with respect to the reference line L when viewed from the axial direction of the rotary shaft 30. Thus, the hose 16 is connected to the front discharge portion 66. On the other hand, the rear discharge portion 68 is disposed on the opposite side of the washer tank 14 with respect to the orthogonal line VL and on the one side in the rotational direction of the impeller 42 with respect to the reference line L when viewed from the axial direction of the rotary shaft 30. And connected to the rear nozzle via the hose 70.

  Here, the front outlet 50 of the washer pump 12 according to the present embodiment is viewed from the axial direction of the rotating shaft 30 and is opposite to the washer tank 14 with respect to the orthogonal line VL and with respect to the reference line L. The impeller 42 is disposed on the other side in the rotational direction. When the motor 28 is driven, the impeller 42 is rotated to one side in the rotation direction, and the cleaning liquid is supplied to the front outlet 50.

That is, in the washer pump 12 and the double outlet pump 60, the front outlet 50 is disposed in the same region (within the arrow E in FIG. 2) with respect to the housing 22. Thereby, the hose 16 can be assembled to the washer pump 12 in the same manner as when the hose 16 is assembled to the double outlet pump 60.

Further, in the washer pump 12 and the double outlet pump 60, the rotation directions of the impeller 42 (the rotating shaft 30 of the motor 28) when the cleaning liquid is supplied to the front outlet 50 are matched. Thereby, even if either the washer pump 12 or the double outlet pump 60 is mounted on the vehicle, the harness of the vehicle can be set to the same polarity, and the motor 28 can also be set to the same polarity. That is, an increase in the types of vehicle harnesses and motors 28 can be suppressed. Further, in order to match the rotation direction of the impeller 42 when supplying the cleaning liquid to the front outlet 50, for example, it is not necessary to separately prepare the impeller 42 between the washer pump 12 and the double outlet pump 60. That is, even if the impeller 42 has a blade shape that has a high discharge pressure when rotating to one side in the rotation direction and a low discharge pressure when rotating to the other side in the rotation direction, the impeller 42 and the double outlet pump 60 are impellers. 42 can be used as it is. Thereby, the big change in the structure in the washer pump 12 and the double outlet pump 60 can be suppressed.

  As described above, even when the washer pump 12 is configured as a single outlet pump using the impeller 42 as described above, the assembly with the double outlet pump 60 is maintained while maintaining the assembly property when the washer pump 12 is mounted on the vehicle. Design can be shared.

  In addition, a guide portion 58 is formed at one end of the peripheral wall portion 54, and the cleaning liquid discharged by the impeller 42 is guided to the discharge passage 52 side by the guide portion 58 as described above. Accordingly, the cleaning liquid discharged by the impeller 42 can be efficiently guided to the discharge passage 52 side by the guide portion 58.

  Further, the front outlet 50 projects from the housing 22 in a direction intersecting with the extending direction of the inlet 34 when viewed from the axial direction of the rotary shaft 30. The guide portion 58 is curved toward one side of the impeller 42 in the rotational direction and the protruding direction side of the front outlet 50 when viewed from the axial direction of the rotary shaft 30. For this reason, the cleaning liquid discharged by the impeller 42 is diverted toward the discharge passage 52 by the guide portion 58 and guided to the discharge passage 52. Thereby, even if it arrange | positions so that the outlet 50 for front and the inlet 34 may cross | intersect seeing from the axial direction of the rotating shaft 30, the washing | cleaning liquid in the pump chamber 38 can be favorably guided to the outlet 50 for front side.

  In the present embodiment, the front outlet 50 is extended from the housing 22 so as to be substantially orthogonal to the inlet 34 when viewed from the axial direction of the rotary shaft 30, but it depends on the layout in the engine room of the vehicle. The extending direction of the front outlet 50 may be changed as appropriate. For example, as shown in FIG. 4, the root portion of the front outlet 50 may be disposed within the range indicated by the arrow E, and the front outlet 50 may be disposed substantially parallel to the inlet 34. That is, by arranging the root portion of the front outlet 50 within the range indicated by the arrow E, it is possible to maintain the assemblability when the washer pump 12 is mounted on the vehicle. In this case, the guide portion 58 may be formed so as to be parallel to the protruding direction of the front outlet 50 when viewed from the axial direction of the rotary shaft 30.

  Further, in the present embodiment, the blades 44 of the impeller 42 are formed in one arc shape that protrudes from the base of the impeller 42 to one side in the rotational direction, but the shape of the blades 44 is not limited to this. For example, the blades 44 may be composed of a plurality of arcs that are convex from the base of the blade 44 to one side in the rotational direction. That is, the discharge pressure when the impeller 42 is rotated to one side in the rotation direction may be set to be higher than the discharge pressure when the impeller 42 is rotated to the other side in the rotation direction.

DESCRIPTION OF SYMBOLS 12 ... Washer pump (vehicle washer pump apparatus), 14 ... Washer tank, 22 ... Housing, 24 ... Motor accommodating part, 28 ... Motor, 30 ... Rotating shaft, 34. ..Inlet, 38 ... pump chamber, 42 ... impeller, 50 ... front outlet (outlet), 52 ... discharge passage (communication passage), 54 ... peripheral wall, 58 ... Guide part, 60 ... double outlet pump, L ... reference line, VL ... orthogonal line

Claims (3)

A housing having a motor housing for housing the motor;
An inlet extending from the housing toward the washer tank in the radial direction of the rotation shaft of the motor, and communicating between the inside of the washer tank and the pump chamber of the housing;
It is provided in the pump chamber so as to rotate integrally with the rotary shaft, and is rotated to one side in the rotational direction by driving the motor, and the discharge pressure when rotated to one side in the rotational direction is rotated to the other side in the rotational direction. Impeller set higher than the discharge pressure when
The tube is formed at one location on the outer peripheral portion of the housing, and the inside is formed as a communication passage communicating with the pump chamber, and the extension direction of the inlet as viewed from the axial direction of the rotating shaft. The other side in the rotational direction of the impeller is disposed on the opposite side of the washer tank with respect to the orthogonal line passing through the axis of the rotating shaft and passing through the axis of the rotating shaft. An outlet placed on the side,
A washer pump device for a vehicle comprising: In the inner peripheral portion of the pump chamber, a peripheral wall portion is formed in a portion excluding the communication passage,
The vehicle washer pump device according to claim 1, wherein a guide portion that guides the liquid discharged by the impeller to the communication path side is formed at one end portion of the peripheral wall portion. The outlet is projected from the housing in a direction intersecting with the extending direction of the inlet as seen from the axial direction of the rotating shaft,
The vehicle washer pump device according to claim 2, wherein the guide portion is curved toward one side in the rotation direction of the impeller and in the protruding direction side of the outlet when viewed from the axial direction of the rotation shaft.