JP2009083716A - Wiper device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a wiper device installable without a wide space. <P>SOLUTION: A pulley 44 reciprocatably rotating by driving force of a wiper motor 40, reciprocatably rotates a pulley 46 and a pivot shaft 20 via a belt 52 rewound on the pulley 44 and the pulley 46. Thus, since the pivot shaft 20 is reciprocatably rotated by the flexible belt 52, an exclusive link member for reciprocatably rotating the pivot shaft 20 is not required. That is, since the wide space for moving the link member for reciprocatably rotating the pivot shaft 20 is not required, the wiper device 10 can be installed on a vehicle body without the wide space. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a wiper device for wiping a glass surface such as a windshield glass of a vehicle.

  A wiper device for wiping a windshield glass of a vehicle includes a wiper pivot to which a wiper on a driver seat side and a passenger seat side is attached. Further, the wiper pivot is provided with a pivot shaft to which the wiper is fixed and reciprocally rotates, and a pivot holder that rotatably supports the pivot shaft.

  Further, a frame member for connecting the pivot holders on the driver's seat side and the passenger seat side is provided, and a wiper motor for applying a driving force to the pivot shaft is attached to the frame member.

Patent Document 1 describes a link member that changes a rotary motion of a wiper motor to a reciprocating rotary motion and transmits it to each pivot shaft. In other words, each link member is attached to each pivot shaft, and the wiper motor moves these link members so that the wiper on the driver's seat side and the passenger seat side is reciprocally rotated.
Japanese Utility Model Publication No. 6-39638

  However, according to this wiper device, it is necessary to move the link member in order to reciprocate the pivot shafts on the driver's seat side and the passenger seat side. That is, in order to attach the wiper device, a wide space for moving each link member is required.

  In view of the above fact, an object of the present invention is to obtain a wiper device that can be attached without a large space.

  According to a first aspect of the present invention, there is provided a wiper device, a wiper motor, a first pivot shaft to which a rotational motion of the wiper motor is transmitted as a reciprocating rotational motion through a link member, and a single wiper is attached, and the first pivot shaft A first rotation transmission member fixed to the first pivot shaft and rotating with the first pivot shaft; a second pivot shaft disposed apart from the first rotation transmission member and to which another wiper is attached; and the second pivot. A second rotation transmission member fixed to the shaft and rotating together with the second pivot shaft; wound around the first rotation transmission member and the second rotation transmission member; And a flexible transmission member that transmits the rotation to the two-rotation transmission member and has flexibility.

  According to the above configuration, the link member transmits the rotational motion of the wiper motor as a reciprocating rotational motion to the first pivot shaft to which one wiper is attached. As a result, the first pivot shaft reciprocates, and the first rotation transmission member fixed to the first pivot shaft also reciprocates.

  On the other hand, the second rotation transmission member is fixed to the second pivot shaft to which the other wiper is attached, and the flexible transmission member wound around the first rotation transmission member and the second rotation transmission member is the first rotation transmission member. The reciprocating rotational motion of the rotation transmitting member is transmitted to the second rotation transmitting member. The second pivot shaft also reciprocates as the second rotation transmission member reciprocates.

  Thus, since the second pivot shaft is reciprocally rotated by the flexible transmission member having flexibility, a dedicated link member for reciprocally rotating the second pivot shaft is not required. That is, since a wide space in which the link member for reciprocatingly rotating the second pivot shaft is not required, the wiper device can be attached even if there is no wide space.

  A wiper device according to a second aspect of the present invention is the wiper device according to the first aspect, wherein at least one of the first rotation transmission member and the second rotation transmission member is elliptical.

  According to the above configuration, since at least one of the first rotation transmission member and the second rotation transmission member has an elliptical shape, the rotation speed of the second pivot shaft can be changed.

  For example, the rotational speed of the second pivot shaft can be lowered at the wiper reversal position, thereby reducing the sound when the wiper is reversed.

  A wiper device according to a third aspect of the present invention is the wiper device according to the first or second aspect, wherein the flexible transmission member is an endless ring, and the flexible transmission member is the first rotation transmission. It intersects between a member and the 2nd rotation transmission member, It is characterized by the above-mentioned.

  According to the above configuration, the endless annular flexible transmission member intersects between the first rotation transmission member and the second rotation transmission member.

  Thus, by intersecting the flexible transmission members, the rotation directions of the first pivot shaft and the second pivot shaft can be opposite to each other, and this structure is also adopted for the wiper of the opposite wiping type. Can do.

  A wiper device according to a fourth aspect of the present invention is the wiper device according to any one of the first to third aspects, wherein the guide roller is in contact with the flexible transmission member and guides the flexible transmission member. It is provided.

  According to the above configuration, the guide roller contacts the flexible transmission member and guides the flexible transmission member.

  As described above, the position of the flexible transmission member can be regulated by the guide roller guiding the flexible transmission member, so that the space can be used effectively.

  A wiper device 10 according to a first embodiment of the present invention will be described with reference to FIGS.

  As shown in FIG. 1, the wiper device 10 wipes the windshield glass 12 on the passenger seat side and the pivot shaft 18 to which the wiper blade 14 and the wiper arm 16 for wiping the windshield glass 12 on the driver seat side are attached. A pivot shaft 20 to which the wiper blade 14 and the wiper arm 16 are attached is provided.

  The pivot shafts 18 and 20 have a circular outer periphery, and the end of the wiper arm 16 is fixed to the tip of the pivot shafts 18 and 20 with nuts (not shown). Further, a pivot holder (not shown) for rotatably supporting the pivot shafts 18 and 20 is provided, and the pivot shaft 20 is supported by the vehicle body by fixing the pivot holder to the vehicle body.

  In addition, as shown in FIG. 2, the rotational movement of a wiper motor 40 described later is reciprocatingly rotated at the base end of the pivot shaft 18 on the driver's seat side (the end opposite to the side on which the wiper arm 16 is attached). A link member 22 is provided for changing and transmitting to the pivot shaft 18.

  Specifically, as shown in FIG. 1, the link member 22 is provided with a plate-like pivot lever 26 whose one end is rotatably attached to the lower end of the pivot shaft 18 by a ball joint (not shown). Yes. Further, a rod-like link rod 30 whose one end is rotatably attached by a ball joint (not shown) is provided at the other end of the pivot lever 26, and a ball joint (not shown) is provided at the other end of the link rod 30. Is provided with a crank arm 34 whose tip is rotatably attached.

  The base end portion of the crank arm 34 is fixed to the output shaft 48 of the wiper motor 40.

  The wiper motor 40 as a drive source is disposed on the vehicle outer side (left side in FIG. 1) with respect to the pivot shaft 18. Further, the wiper motor 40 has a configuration in which a motor portion 40A and a gear portion 40B are integrally provided, and the output shaft 48 is provided so as to protrude from the housing 42 of the gear portion 40B. The housing 42 is provided with leg portions (not shown), and the wiper motor 40 is supported by the vehicle body by fixing the leg portions to the vehicle body with bolts or the like.

  With this configuration, when the output shaft 48 of the wiper motor 40 rotates in the direction A shown in FIG. 1, the link rod 30 reciprocates in the substantially longitudinal direction of the link rod 30 (direction B shown in FIG. 1). The pivot lever 26 and the pivot shaft 18 are configured to reciprocate.

  Further, the pivot shaft 18 is fixed with a round-shaped pulley 44 as a first rotation transmission member that reciprocally rotates together with the pivot shaft 18.

  As shown in FIG. 3, the pulley 44 has the same rotation axis as the pivot shaft 18, and a recess 44 </ b> A around which a belt 52 described later is wound is provided on the outer peripheral portion.

  On the other hand, as shown in FIG. 1, similarly to the pivot shaft 18, a perfect circular pulley 46 as a second rotation transmission member is also fixed to the pivot shaft 20 on the passenger seat side.

  The pulley 46 has a smaller diameter than the pulley 44, and a recess 46 </ b> A (see FIG. 3) is provided on the outer peripheral portion of the pulley 46, similar to the pulley 44.

  Further, as shown in FIGS. 1 and 3, an endless belt 52 as a flexible transmission member having flexibility is wound around the recess 44A of the pulley 44 and the recess 46A of the pulley 46. .

  The surface of the belt 52 that comes into contact with the recesses 44A and 46A is provided with an uneven shape, and the recesses 44A and 46A are also provided with an uneven shape so as to mesh with the uneven shape. With this configuration, the belt 52 does not slide on the concave portions 44A and 46B.

  Between the pulley 44 and the pulley 46, two guide rollers 54 are provided on the engine room side (downward in FIG. 1) that contact the belt 52 and guide the belt 52 to regulate the position of the belt 52. It has been.

  By providing this guide roller 54, the space on the engine room side can be further expanded.

  The guide roller 54 is pivotally supported by a bracket (not shown) spanned between the pivot shaft 18 and the pivot shaft 20.

  Next, the operation of this embodiment will be described.

  When the output shaft 48 of the wiper motor 40 rotates in the direction of arrow A shown in FIG. 1 in accordance with an instruction from the control unit, the crank arm 34 also rotates in the direction of arrow A. When the crank arm 34 rotates, the link rod 30 rotatably attached to the tip end portion of the crank arm 34 reciprocates substantially in the vehicle width direction (the direction of arrow B shown in FIG. 1), and accordingly, the pivot lever 26 , And the pivot shaft 18 reciprocates in the direction of arrow C.

  When the pivot shaft 18 reciprocates in the direction of arrow C, the pulley 44 also reciprocates in the direction of arrow C. The reciprocating rotational movement of the pulley 44 is transmitted to the pulley 46 through the belt 52, and the pulley 46 reciprocates in the direction of arrow D. To do. As the pulley 46 reciprocates, the pivot shaft 20 reciprocates.

  As described above, when the pivot shafts 18 and 20 on the driver's seat side and the passenger seat side reciprocate, the wiper arm 16 and the wiper blade 14 attached to the respective pivot shafts 18 and 20 reciprocate within a predetermined range. Then, the raindrops on the windshield glass 12 are wiped off.

  As described above, since the pulley 46 has a smaller diameter than the pulley 44, the rotation angle of the pivot shaft 20 fixed to the pulley 44 is larger than the rotation angle of the pivot shaft 18. As a result, raindrops and the like on the windshield glass 12 on the passenger seat side having a larger required wiping area compared to the driver seat side can be wiped off.

  Here, since the pivot shaft 20 is reciprocally rotated by the belt 52, a dedicated link member for reciprocating the pivot shaft 20 becomes unnecessary. That is, since a wide space (K range shown in FIG. 1) in which the link member that reciprocally rotates the pivot shaft 20 is not required, the wiper device 10 can be attached to the vehicle body even if there is no wide space.

  Further, since a large space (K range shown in FIG. 1) in which the link member that reciprocally rotates the pivot shaft 20 is movable is not necessary, the engine room can be widened.

  Further, since the driving force is transmitted by the belt 52 having flexibility, the wiper device 10 can be freely arranged as compared with a wiper device that transmits the driving force by a conventional link member.

  In addition, by changing the outer diameter of the pulley 44 or the pulley 46, the transmission speed ratio to the pulley 46 can be easily changed, so that one wiper and another wiper have different wiping speeds and wiping angles. The wiping pattern can be easily changed.

  Although the present invention has been described in detail with respect to specific embodiments, the present invention is not limited to such embodiments, and various other embodiments are possible within the scope of the present invention. It is clear to the contractor. For example, in the above-described embodiment, force is transmitted using a pulley and a belt, but a chain and a gear meshing with the chain may be used.

  In the above-described embodiment, the belt 52 is wound around the pulley 44 and the pulley 46 and the driving force is transmitted to the pulley 46. Instead, the driving force is transmitted by winding a wire or the like around the pulley 44 and the pulley 46. May be.

  Next, the configuration of the wiper device 60 according to the second embodiment of the present invention will be described with reference to FIG.

  In addition, about the same member as 1st Embodiment, the same code | symbol is attached | subjected and the description is abbreviate | omitted.

  In this embodiment, as in the first embodiment, the pulley 62 fixed to the pivot shaft 20 on the passenger seat side does not have a perfect circle shape, but instead, the pulley 62 has an elliptical shape.

  Further, as shown in FIG. 4B, when the wiper blade 14 reaches the upper reversal position, the long axis of the elliptical pulley 62 is set to face in the vehicle vertical direction (vertical direction shown in FIG. 4). Has been.

  As described above, when the wiper blade 14 reaches the upper reversal position, the long axis of the pulley 62 is oriented in the vehicle vertical direction, and therefore the pivot shaft 20 when the wiper blade 14 reaches the upper reversal position. , And the rotational torque increases. Thereby, the sound when the wiper blade 14 is inverted at the upper inversion position can be reduced.

  In particular, since the upper reversing position of the wiper blade 14 on the passenger seat side is performed at the center of the windshield glass 12, the discomfort with respect to the reversing sound can be greatly improved.

  Further, when wiping the front of the line of sight of an occupant seated in the passenger seat, the wiper blade 14 can be quickly moved to wipe away raindrops and the like.

  Although the present invention has been described in detail with respect to specific embodiments, the present invention is not limited to such embodiments, and various other embodiments are possible within the scope of the present invention. It is clear to the contractor. For example, in the above embodiment, the pulley 62 on the passenger seat side has an elliptical shape, but instead, the pulley on the driver's seat side may have an elliptical shape.

  In the above embodiment, the rotational speed of the pivot shaft 20 on the passenger seat side is changed. However, even if the drive transmission path is reversed between the driver seat side and the passenger seat side, and the rotational speed of the pivot shaft on the driver seat side is changed. Good. In this case, it is possible to prevent the wiper blade and the A-pillar from interfering with each other by slowing the rotational speed of the pivot shaft on the driver's seat at the upper reversal position and increasing the rotational torque.

  Next, the configuration of the wiper device 70 according to the third embodiment of the present invention will be described with reference to FIG.

  In addition, about the same member as 1st Embodiment, the same code | symbol is attached | subjected and the description is abbreviate | omitted.

  In this embodiment, unlike the first embodiment, the diameter of the pulley 72 on the driver's seat side and the diameter of the pulley 74 on the passenger seat side are substantially the same, and the pulley 74 on the passenger seat side is made of the windshield glass 76. It arrange | positions under the vehicle outer side edge part (lower side shown in FIG. 5).

  Further, the wiper arm 82 and the wiper blade 84 on the driver's seat side and the passenger seat side are disposed to face each other so as to face each other.

  Further, the belt 78 is wound around the pulley 72 and the pulley 74 so as to intersect between the pulley 72 and the pulley 74.

  With this configuration, when the output shaft 48 of the wiper motor 40 rotates in the direction of arrow E shown in FIG. 5 according to an instruction from the control unit, the crank arm 34 also rotates in the direction of arrow E. When the crank arm 34 rotates, the link rod 30 rotatably attached to the distal end portion of the crank arm 34 reciprocates substantially in the vehicle width direction (in the direction of arrow F shown in FIG. 5). , And the pivot shaft 18 reciprocally rotates in the direction of the arrow G.

  Further, when the pivot shaft 18 reciprocates in the direction of arrow G, the pulley 72 also reciprocates in the direction of arrow G, and the reciprocating rotational motion of the pulley 72 is transmitted to the pulley 74 through the belt 78.

  Here, since the belt 78 intersects between the pulley 72 and the pulley 74, the pulley 74 reciprocates in the direction of arrow H which is the opposite direction to the pulley 74. As the pulley 74 reciprocates in the direction of arrow H, the pivot shaft 20 similarly reciprocates in the direction of arrow H.

  Accordingly, as shown in FIG. 5B, the wiper arm 82 and the wiper blade 84 on the driver's seat side and the passenger seat side rise from the center of the windshield glass 76, and A pillars on both sides (not shown). It is rotated so as to open toward the screen, and raindrops and the like on the windshield glass 76 are wiped off.

  In this way, by rotating the belt 78 between the pulley 72 and the pulley 74, the rotation directions of the pulley 72 and the pulley 74 can be opposite to each other. Even in the case of the wiper device 70 of the counter-wiping type, The driving force can be transmitted by the belt 78 to the pulley 74 on the passenger seat side. In addition, the rotational axes of the pulley 72 and the pulley 74 may be twisted relative to each other, and the tensioner may be disposed.

  Next, the structure of the wiper apparatus 80 which concerns on 4th Embodiment of this invention is demonstrated according to FIG.

  In addition, about the same member as 1st Embodiment, the same code | symbol is attached | subjected and the description is abbreviate | omitted.

  In this embodiment, unlike the first embodiment, the wiper motor 40 is disposed between the pulley 44 and the pulley 46.

  In this manner, by disposing the wiper motor 40 between the pulley 44 and the pulley 46, the wiper motor 40 can be mounted even when there is no space for mounting the wiper motor 40 outside the vehicle.

  Next, the structure of the wiper apparatus 90 which concerns on 5th Embodiment of this invention is demonstrated according to FIG.

  In addition, about the same member as 1st Embodiment, the same code | symbol is attached | subjected and the description is abbreviate | omitted.

  In this embodiment, unlike the first embodiment, the guide roller 92 provided between the pulley 44 and the pulley 46 is not on the engine room side (lower side shown in FIG. 7) but on the vehicle interior side (upper side shown in FIG. 7). Is provided.

  Thus, by providing the guide roller 92 inside the vehicle, the space inside the vehicle can be widened, and the inside of the vehicle can be widened.

  Next, the structure of the wiper apparatus 100 which concerns on 6th Embodiment of this invention is demonstrated according to FIG.

  In addition, about the same member as 1st Embodiment, the same code | symbol is attached | subjected and the description is abbreviate | omitted.

  In this embodiment, unlike the first embodiment, a recess 102A around which the belt 52 is wound and a recess 102B having a smaller diameter than the recess 102A are provided on the outer periphery of the pulley 102 on the passenger seat side.

  As described above, by providing the recesses having different diameters and using the recesses 102A and 102B, the rotational speed of the wiper arm 16 and the wiper blade 14 to which the rotational force is transmitted from the pulley 102 can be changed.

(A) (B) It is the top view which showed the wiper apparatus which concerns on 1st Embodiment of this invention, and showed the state by which the wiper blade has been arrange | positioned in the lower inversion position and the upper inversion position. (A) (B) The bottom view which showed the wiper apparatus which concerns on 1st Embodiment of this invention, and showed the state by which the wiper blade has been arrange | positioned in the lower inversion position and the upper inversion position. It is the perspective view which showed two pulleys, a belt, etc. which were provided in the wiper apparatus which concerns on 1st Embodiment of this invention. (A) (B) It is the top view which showed the wiper apparatus which concerns on 2nd Embodiment of this invention, and showed the state by which the wiper blade is arrange | positioned in the lower inversion position and the upper inversion position. (A) (B) It is the top view which showed the wiper apparatus which concerns on 3rd Embodiment of this invention, and showed the state by which the wiper blade has been arrange | positioned in the lower inversion position and the upper inversion position. (A) (B) It is the top view which showed the wiper apparatus which concerns on 4th Embodiment of this invention, and showed the state by which the wiper blade has been arrange | positioned in the lower inversion position and the upper inversion position. (A) (B) It is the top view which showed the wiper apparatus which concerns on 5th Embodiment of this invention, and showed the state by which the wiper blade has been arrange | positioned in the lower inversion position and the upper inversion position. It is the perspective view which showed two pulleys, a belt, etc. which were provided in the wiper apparatus which concerns on 6th Embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Wiper device, 12 ... Windshield glass, 14 ... Wiper blade (wiper), 16 ... Wiper arm (wiper), 18 ... Pivot shaft (first pivot shaft) ), 20... Pivot shaft (second pivot shaft), 22... Link member, 40... Wiper motor, 44... Pulley (first rotation transmission member), 46. Pulley (second rotation transmission member) 52 ... belt (flexible transmission member) 54 ... guide roller 60 ... wiper device 62 ... pulley (second rotation transmission) Member), 70 ... Wiper device, 72 ... pulley (first rotation transmission member), 74 ... pulley (second rotation transmission member), 78 ... belt (flexible transmission) Member), 80... Wiper device, 82. Arm (wiper), 84 ... Wiper blade (wiper), 90 ... Wiper device, 92 ... Guide roller, 100 ... Wiper device, 102 ... Pulley (second rotation transmission member) )

Claims (4)

A wiper motor,
A rotational movement of the wiper motor is transmitted as a reciprocating rotational movement through a link member, and a first pivot shaft to which one wiper is attached;
A first rotation transmission member fixed to the first pivot shaft and rotating together with the first pivot shaft;
A second pivot shaft that is spaced apart from the first pivot shaft and to which another wiper is attached;
A second rotation transmission member fixed to the second pivot shaft and rotating together with the second pivot shaft;
A flexible transmission member wound around the first rotation transmission member and the second rotation transmission member to transmit the rotational motion of the first rotation transmission member to the second rotation transmission member; ,
A wiper device comprising:   2. The wiper device according to claim 1, wherein at least one of the first rotation transmission member and the second rotation transmission member has an elliptical shape. The flexible transmission member is an endless ring,
The wiper device according to claim 1 or 2, wherein the flexible transmission member intersects between the first rotation transmission member and the second rotation transmission member.   The wiper device according to any one of claims 1 to 3, further comprising a guide roller that contacts the flexible transmission member and guides the flexible transmission member.

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