JP6996205B2 - Vehicle wiper device - Google Patents

Description

The present invention relates to a vehicle wiper device.

A vehicle wiper device installed in a vehicle such as an automobile generally rotates a pivot shaft by a driving force of a drive source to swing a wiper arm connected via the pivot shaft. Further, in Patent Document 1, the first passenger seat side pivot shaft (pivot shaft) that is rotated by the driving force of the drive source and the first drive lever that is fixed so as not to rotate relative to the first passenger seat side pivot shaft. A technique for substantially expanding the wiping range by swinging the wiper arm via a (rotating member) or the like is disclosed.

Japanese Unexamined Patent Publication No. 2017-7647

However, in the vehicle wiper device as described above, although it is necessary to accurately position the relative position in the rotation direction between the first passenger seat side pivot shaft (pivot shaft) and the first drive lever (rotating member), There is no description about positioning, and the assembly work becomes complicated. Further, in a vehicle wiper device in which the wiper arm (rotating member) is simply fixed to the pivot shaft, the wiper arm is fixed to the pivot shaft while being positioned with respect to the vehicle, which complicates the assembly work.

The present invention has been made to solve the above problems, and an object of the present invention is to provide a vehicle wiper device that facilitates assembly work.

The vehicle wiper device that solves the above-mentioned problems has a pivot shaft that is rotated by the driving force of the drive source, and a rotating member that has an inserted portion into which the pivot shaft is inserted and is fixed so as not to rotate relative to the pivot shaft. The vehicle wiper device is provided with a positioning portion for determining a relative position in a rotational direction between the pivot shaft and the rotating member at a specific position, and the positioning portion is of the pivot shaft. The pivot shaft includes a concave portion recessed from the outer surface toward the center of the shaft and a convex portion convex from the inner peripheral surface of the inserted portion toward the center of the shaft and fitted into the concave portion. It has a rotating member fixing portion in which a knurled portion that is in close contact with the inserted portion is formed while the outer diameter becomes smaller toward the tip side in the axial direction, and the inserted portion faces from the inner peripheral surface thereof toward the center of the shaft. It has a plurality of extending portions that extend and come into close contact with the knurled portion at intervals in the circumferential direction, and the inserted portion and the knurled portion are configured to be in close contact with each other only in a part of the circumferential direction. The rotating member fixing portion on which the knurled portion is formed is provided with the concave portion, and one convex portion is provided on the inner peripheral surface of the inserted portion, and the extending portion adjacent to each other in the circumferential direction. It is provided at a space between the two extending portions adjacent to each other in the circumferential direction.

According to the same configuration, since the pivot shaft and the rotating member are provided with a positioning unit for determining the relative position in the rotational direction to a specific position, the relative position in the rotational direction can be positioned with high accuracy. Assembling work becomes easy.

According to the same configuration, the positioning portion has a concave portion recessed from the outer surface of the pivot shaft toward the center of the shaft and a convex portion from the inner peripheral surface of the inserted portion of the rotating member toward the center of the shaft. Since it includes a convex portion that is provided and fits into the concave portion, the relative position in the rotational direction of each other can be determined to a specific position with a simple configuration without the need for a separate member.

According to the same configuration, the pivot shaft has a rotating member fixing portion in which an outer diameter becomes smaller toward the tip end side in the axial direction and a knurled portion in close contact with the inserted portion is formed, so that the pivot shaft is separate from the positioning portion. It is possible to prevent the relative rotation between the pivot shaft and the rotating member by the configuration of. Therefore, for example, the strength of the positioning unit can be reduced as compared with the configuration in which the relative rotation is prevented only by the positioning unit, and the positioning unit can be configured as long as the relative position can be simply determined.

According to the same configuration, since the inserted portion and the knurled portion are configured to be in close contact with each other only in a part in the circumferential direction, a torque for preventing relative rotation (in other words, a torque for starting idling) is suitable. It is possible to set the value to the value.

According to the same configuration, the inserted portion has a plurality of extended portions extending from the inner peripheral surface thereof toward the axis center side and in close contact with the knurled portion at intervals in the circumferential direction. And the knurled portion can be brought into close contact with each other only in a part in the circumferential direction.

According to the vehicle wiper device of the present invention, the assembly work can be facilitated.

The partial schematic diagram of the vehicle provided with the vehicle wiper device in one embodiment. The plan view of the vehicle wiper device in one Embodiment. FIG. 3 is a cross-sectional view around the pivot axis on the passenger seat side in one embodiment. The plan view for demonstrating the operation of the vehicle wiper device in one Embodiment. The plan view for demonstrating the operation of the vehicle wiper device in one Embodiment. The plan view for demonstrating the operation of the vehicle wiper device in one Embodiment. The plan view for demonstrating the operation of the vehicle wiper device in one Embodiment. The perspective view of the 1st passenger seat side pivot shaft and the 1st drive lever in one Embodiment. (A) is a plan view of the first passenger seat side pivot shaft and the first drive lever in one embodiment. (B) is also a cross-sectional view of the first passenger seat side pivot shaft and the first drive lever. Another perspective view of the first passenger seat side pivot shaft, the first drive lever, and the intervening member. (A) is a plan view of another example of the first passenger seat side pivot shaft, the first drive lever, and the intervening member. (B) is also a cross-sectional view of the first passenger seat side pivot shaft, the first drive lever, and the intervening member.

Hereinafter, an embodiment of a vehicle provided with a vehicle wiper device will be described with reference to FIGS. 1 to 9.
As shown in FIG. 1, a vehicle wiper device 2 is arranged below the front window 1 (toward the ground) as a wiping surface of the vehicle. The front window 1 has a black ceramic area 1a (shaded portion in FIG. 1) colored black on its edge.

As shown in FIGS. 2 and 4 to 7, the vehicle wiper device 2 includes a substantially plate-shaped frame 3 and a first holder portion 4 provided on one side (left side in the drawing) of the frame 3 in the vehicle width direction. A pipe frame 5 having one end fixed to the frame 3 so as to extend in the opposite direction to the other side in the vehicle width direction (right side in the figure), and a second holder fixed to the other end of the pipe frame 5. A member 6 is provided. Then, in the vehicle wiper device 2, the support portion 3a provided at the center of the frame 3 in the vehicle width direction is supported by the vehicle and is formed at one end of the frame 3 in the vehicle width direction (the tip of the first holder portion 4). The fixing portion 6a formed on the fixing portion 3b and the second holder member 6 is fastened to the vehicle and is fixed to the vehicle (the vehicle body thereof).

Further, the vehicle wiper device 2 includes a first motor 11 as a first drive source fixed to the back surface of the frame 3 (a surface on the inner side of the vehicle) and a second motor 12 as a second drive source.
The rotary shaft 11a of the first motor 11 penetrates the frame 3 and protrudes from the surface of the frame 3 (the surface on the outer side of the vehicle), and the distal end portion of the rotary shaft 11a is the base end portion of the first drive crank arm 13. Is fixed. Further, the rotary shaft 12a of the second motor 12 penetrates the frame 3 and protrudes from the surface of the frame 3 (the surface on the outer side of the vehicle), and the tip of the rotary shaft 12a is the base of the second drive crank arm 14. The ends are fixed.

The first motor 11 and the second motor 12 are motors in which the rotation shafts 11a and 12a are controlled so as to be able to rotate (rotate) in the forward and reverse directions in an angle range of less than one rotation, and the rotation speed thereof can also be controlled. A DC motor with a brush or a brushless motor). Further, the first motor 11 and the second motor 12 each have a magnetic sensor (magnetic resistance element or the like) inside, and the magnetic sensor is fixed to, for example, a worm wheel that rotates integrally with the rotating shafts 11a and 12a. By sensing the magnetometer of the sensor magnet, it is possible to output a rotation position signal corresponding to the rotation position (rotation angle) of the rotation shafts 11a and 12a.

Further, the driver's seat side pivot shaft 15 is rotatably supported by the first holder portion 4, and the driver's seat is located at the base end portion (the end portion on the back side of the paper in FIG. 2) of the driver's seat side pivot shaft 15. The side swing lever 16 is fixed, and the second wiper arm 17 (its arm head) on the driver's seat side is fixed to the tip of the pivot shaft 15 on the driver's seat side (the end on the front side of the paper in FIG. 2). There is. As shown in FIG. 1, a second wiper blade 18 for wiping the driver's seat side of the front window 1 is connected to the tip end portion of the second wiper arm 17.

The tip of the first drive crank arm 13 and the driver's seat side swing lever 16 are connected by a first connecting rod 19. As a result, when the first motor 11 is driven, the first drive crank arm 13 rotates, and the power thereof is transmitted to the driver's seat side swing lever 16 via the first connecting rod 19, and the driver's seat side. The swing lever 16 swings, and the second wiper arm 17 swings (rotates and drives on a constant axis with respect to the vehicle) together with the driver's seat side swing lever 16. Then, the range between the upper inverted position and the lower inverted position on the driver's seat side of the front window 1 is reciprocally wiped by the second wiper blade 18. In FIG. 1, the normal wiping range H1 by the second wiper blade 18 is shown by a alternate long and short dash line.

Further, as shown in FIG. 3, in the second holder member 6, the first passenger seat side pivot shaft 21 as a pivot shaft is rotatably supported around the first axis L1 and as a different type pivot shaft. The second passenger seat side pivot shaft 22 is rotatably supported around the second axis L2. In the present embodiment, the first axis L1 and the second axis L2 are arranged on the same straight line L (concentric). Further, in the present embodiment, the first passenger seat side pivot shaft 21 and the second passenger seat side pivot shaft 22 form a double shaft.

Specifically, the second holder member 6 is formed with a cylindrical portion 6b, and the first passenger seat side pivot shaft 21 is rotatably supported on the inner peripheral side thereof via a bearing 23. The first passenger seat side pivot shaft 21 is formed in a cylindrical shape, and the second passenger seat side pivot shaft 22 is rotatably supported on the inner peripheral side thereof via a bearing 24. As a result, the first axis L1 of the first passenger seat side pivot shaft 21 and the second axis L2 of the second passenger seat side pivot shaft 22 are at constant positions (immovable positions) with respect to the vehicle body, and are the same. It is arranged on a straight line L. The outer bearing 23 of the present embodiment is a ball bearing, and the inner bearing 24 is a sintered metal oil-impregnated bearing.

The first passenger seat side swing lever 25 is fixed to the base end portion of the first passenger seat side pivot shaft 21, and the first drive as a rotating member is fixed to the tip end portion of the first passenger seat side pivot shaft 21. The lever 26 is fixed. Then, as shown in FIG. 2, the tip end portion of the first drive crank arm 13 and the first passenger seat side swing lever 25 are driven and connected by a second connecting rod 27. As a result, when the first motor 11 is driven, the first drive crank arm 13 rotates, and the power thereof is transmitted to the first passenger seat side swing lever 25 via the second connecting rod 27. The first passenger seat side swing lever 25 swings, and the first drive lever 26 swings (rotates) around the first axis L1 together with the first passenger seat side swing lever 25.

Further, as shown in FIG. 3, the second passenger seat side pivot shaft 22 is formed longer than the first passenger seat side pivot shaft 21, and its base end portion and tip portion thereof are formed to be longer than the first passenger seat side pivot shaft 21. A second passenger seat side swing lever 28 is fixed to the base end portion thereof, and a second drive lever 29 is fixed to the tip end portion of the second passenger seat side pivot shaft 22. ..

The tip of the second drive crank arm 14 and the second passenger seat side swing lever 28 are connected by a third connecting rod 31. As a result, when the second motor 12 is driven, the second drive crank arm 14 rotates, and the power thereof is transmitted to the second passenger seat side swing lever 28 via the third connecting rod 31 to the second. 2 The passenger side swing lever 28 swings, and the second drive lever 29 swings (rotates) together with the second passenger seat side swing lever 28. The first passenger seat side pivot shaft 21 and the second passenger seat side pivot shaft 22 are not interlocked with each other. In other words, the first passenger seat side pivot shaft 21 and the second passenger seat side pivot shaft 22 are arranged on the same straight line L, but their rotational movements are independent of each other.

Further, as shown in FIGS. 2 and 4 to 7, the vehicle wiper device 2 has a base end side rotatably connected around a third axis L3 on the tip end side of the first drive lever 26. 1 The driven lever 32 is provided.

Further, the vehicle wiper device 2 is rotatably connected to the base end side about the fourth axis L4 on the tip end side of the first driven lever 32, and is connected to the tip end side of the second drive lever 29. An arm head 33 whose tip end side is rotatably connected with the 5-axis line L5 as the center (swing center axis) is provided. As shown in FIG. 1, the arm head 33 constitutes a first wiper arm 35 together with a retainer 34 and the like connected to the tip end portion thereof, and the passenger side of the front window 1 is wiped off from the tip end portion of the first wiper arm 35. The first wiper blade 36 for the window is connected.

The first drive lever 26, the second drive lever 29, the first driven lever 32, and the arm head 33 have a length from the first axis L1 (the second axis L2) to the third axis L3, and the above. The lengths from the 4th axis L4 to the 5th axis L5 are set to be the same and connected. Further, the first drive lever 26, the second drive lever 29, the first driven lever 32, and the arm head 33 have a length from the third axis L3 to the fourth axis L4 and the first axis L1 (the first axis L1. The lengths from the second axis L2) to the fifth axis L5 are set to be the same and connected. That is, they are parallelogram-shaped link mechanisms in which the first drive lever 26 and the arm head 33 are kept parallel, and the second drive lever 29 and the first driven lever 32 are kept parallel. In this embodiment, the first drive lever 26, the first driven lever 32, and the arm head 33 are driven by the driving force of the first motor 11 to reciprocate and swing the first wiper arm 35. is doing. Further, in the present embodiment, the second drive lever 29 is a telescopic mechanism that is driven by the driving force of the second motor 12 to expand and contract the first wiper arm 35 in the longitudinal direction thereof, and is a swing center of the first wiper arm 35. It constitutes an axis movement mechanism for moving the axis (fifth axis line L5) in the vertical direction of the front window 1.

From the above configuration, the vehicle wiper device 2 rotates the first drive lever 26 by the driving force of the first motor 11, and when the wiping operation by the first wiper blade 36 is performed, the second drive lever 29 is set to the second. By rotating the motor 12 with the driving force and moving the fifth axis L5 on the tip end side of the second drive lever 29 to the upper side of the front window 1, the wiping range by the first wiper blade 36 is substantially expanded. It is possible to expand (variable).

Then, as shown in FIG. 1, in the vehicle wiper device 2 of the present embodiment, the fifth axis L5 position when the first wiper blade 36 is in the downward inverted position on the front window 1 is used as a reference position. Reference drive with the wiping range by the first wiper blade 36 in the state where the axis L5 is in the reference position as the reference range Z1, and the first wiper by moving the fifth axis L5 to the upper side of the front window 1 from the reference position. A control unit 41 that drives and controls the first motor 11 and the second motor 12 so as to be able to switch between an expansion drive in which the wiping range by the blade 36 is an expansion range Z2 that is expanded from the reference range Z1. I have. The control unit 41 is electrically connected to the first motor 11 and the second motor 12, respectively, and has a rotation position signal (drive) corresponding to the rotation position (rotation angle) of the rotation shafts 11a and 12a input from them. The first motor 11 and the second motor 12 are driven and controlled based on the state signal). Specifically, when the position of the fifth axis L5 when the first wiper blade is in the downward inversion position is set as the reference position, the control unit 41 drives and controls the first motor 11 in the reference drive (at this time, the first). 2 The motor 12 is stopped), so that the reference range Z1 is wiped by the first wiper blade 36 in a state where the fifth axis L5 is in the reference position (positions of FIGS. 2 and 7). In other words, in the reference drive, the control unit 41 does not swing (rotate) the second drive lever 29 around the second axis L2 (does not drive the expansion / contraction mechanism (axis movement mechanism)), but the fifth axis line. While keeping L5 in the reference position (only the swing mechanism is driven), the reference range Z1 is wiped by the first wiper blade 36. On the other hand, in the expansion drive, the control unit 41 drives and controls the first motor 11 and the second motor 12 (driving the expansion / contraction mechanism (axis movement mechanism) and the swing mechanism) to drive the second drive lever 29. The fifth axis L5 on the tip side is moved (or moved) above the front window 1 from the reference position (see FIGS. 1, 4 to 6), and the reference is provided by the first wiper blade 36. The enlarged range Z2, which is larger than the range Z1, is wiped out.

Further, the control unit 41 of the present embodiment normally moves when the first wiper blade 36 moves forward (when it moves from a stop position along the lower end of the front window 1 or a lower reverse position to an upper reverse position) and when it returns. The second motor 12 is driven and controlled so that the expansion drive is performed at the time (when moving from the upper inversion position to the stop position or the lower inversion position). In the expansion drive, the control unit 41 simultaneously rotates the first drive lever 26 by the driving force of the first motor 11 to move (rotate) the first wiper blade 36. The two motors 12 are driven and controlled so that the first wiper blade 36 wipes the front window 1 to a position close to the upper corner. That is, when the control unit 41 moves the first wiper blade 36 to a position corresponding to the upper corner in the front window 1 based on the rotation position signals from the first motor 11 and the second motor 12, the second wiper blade 36 is second. The second motor 12 is driven and controlled so that the fifth axis L5, which is located on the tip end side of the drive lever 29 and is the center of rotation of the first wiper blade 36, approaches the corner side.

Here, as shown in FIGS. 8, 9 (a) and 9 (b), the first drive lever 26 penetrates the base end portion thereof in the plate thickness direction, and the first passenger seat side pivot shaft 21 is inserted. With the inserted portion 26a to be inserted and the first passenger seat side pivot shaft 21 inserted into the inserted portion 26a, the first passenger seat side pivot shaft 21 is fixed so as not to rotate relative to the first passenger seat side pivot shaft 21.

The first passenger seat side pivot shaft 21 and the first drive lever 26 of the present embodiment are provided with a concave portion 21a and a convex portion 26b as positioning portions for determining a relative position in the rotational direction of each other at a specific position. ..

Specifically, first, the first passenger seat side pivot shaft 21 is a rotating member having a knurled portion 21b formed on the tip end side thereof so that the outer diameter becomes smaller toward the tip end side in the axial direction and the knurled portion 21b is in close contact with the inserted portion 26a. It has a fixed portion 21c. The knurled portion 21b is formed with small irregularities, and is a resistance when the inserted portion 26a in close contact tries to rotate relative to each other. The knurled portion 21b of the present embodiment has a large number of vertical grooves (not shown) arranged side by side in the circumferential direction along the axial direction. Further, the first passenger seat side pivot shaft 21 has a male screw portion 21d (screw groove is not shown) having an outer diameter smaller than the outer diameter of the tip portion of the rotating member fixing portion 21c at the tip portion thereof.

The recess 21a is formed from the outer surface toward the center of the shaft along the axial direction in a range from the tip of the rotating member fixing portion 21c to a position slightly beyond the base end of the rotating member fixing portion 21c. It is recessed. The depth of the recess 21a is set sufficiently deeper than the vertical groove of the knurled portion 21b, and the knurled portion 21b is formed on the entire circumference of the rotating member fixing portion 21c except for the position where the recess 21a is formed. There is.

Further, the inserted portion 26a of the first drive lever 26 has a plurality of extending portions 26c extending from the inner peripheral surface thereof toward the axis center side and in close contact with the knurled portion 21b in the circumferential direction. The convex portion 26b is projected from the inner peripheral surface of the inserted portion 26a toward the axis center side between the extending portions 26c adjacent to each other in the circumferential direction, and can be fitted into the concave portion 21a. ing. In the present embodiment, a total of six convex portions 26b and five extending portions 26c are formed at equal angular intervals. That is, the five extending portions 26c are formed at intervals of 60 °, and the convex portions 26b are formed at the central angle in the range of 120 ° in which the extending portions 26c are not formed.

Then, the first passenger seat side pivot shaft 21 is inserted into the inserted portion 26a of the first drive lever 26 so that the convex portion 26b fits into the concave portion 21a, and the nut 42 is screwed into the male screw portion 21d. The knurled portion 21b is brought into close contact (pressing contact) with the extended portion 26c, and the first passenger seat side pivot shaft 21 and the first drive lever 26 are fixed so as not to rotate relative to each other.

Next, the operation of the vehicle wiper device 2 configured as described above will be described.
Since the second wiper arm 17 and the second wiper blade 18 simply rotate (swing) about the driver's seat side pivot shaft 15 when the first motor 11 is driven, here. , The movement of the first wiper arm 35 and the first wiper blade 36 side will be described in detail.

For example, as shown in FIG. 2, when the washer switch provided in the driver's seat is operated while the first wiper arm 35 (and the first wiper blade 36) is in the stop position (downward inverted position), the said The first motor 11 is driven by the control unit 41, and the first drive lever 26 is rotated by the driving force. At this time, the second motor 12 is also driven by the control unit 41, and the expansion operation is performed.

At this time, as shown in FIG. 4, the first drive lever 26 is rotated until the first wiper arm 35 (and the first wiper blade 36) is moved about 1/4 between the upside down positions. The second drive lever 29 is also rotated so that the fifth axis L5 is moved to the upper side of the front window 1. As a result, the tip end portion of the first wiper blade 36 (see FIG. 1) is moved upward along the widthwise end portion of the front window 1 to wipe the front window 1.

Then, as shown in FIG. 5, the first drive lever 26 is further rotated so that the first wiper arm 35 (and the first wiper blade 36) is moved about halfway between the upside down positions. The second drive lever 29 is also rotated so that the 5-axis line L5 is further moved upward. As a result, as shown in FIG. 1, the tip end portion of the first wiper blade 36 is moved to a position near the upper corner of the front window 1 and the front window 1 is wiped off.

Then, as shown in FIG. 6, until the first drive lever 26 is further rotated and the first wiper arm 35 (and the first wiper blade 36) is moved about 3/4 between the upside down positions. The second drive lever 29 is also rotated (in the reverse direction) so that the fifth axis L5 is moved to the lower side of the front window 1. As a result, the tip of the first wiper blade 36 (see FIG. 1) is moved in the width direction (leftward in FIG. 1) substantially along the upper end of the front window 1 to wipe the front window 1.

Then, as shown in FIG. 7, the fifth axis L5 is further lowered until the first drive lever 26 is further rotated and the first wiper arm 35 (and the first wiper blade 36) finishes moving forward. The second drive lever 29 is also rotated (in the reverse direction) so as to be moved to the reference position. As a result, the front window 1 is wiped out of the enlarged range Z2 by the first wiper blade 36 (see FIG. 1).

Then, at the time of recovery, the expansion range Z2 is wiped off by the first wiper blade 36 (see FIG. 1) due to the movement opposite to the above-mentioned forward movement.
Next, the effects of the above embodiment will be described below.

(1) Since the first passenger seat side pivot shaft 21 and the first drive lever 26 are provided with a concave portion 21a and a convex portion 26b as positioning portions for determining a relative position in the rotation direction of each other to a specific position, they are provided. The relative position in the rotation direction can be positioned with high accuracy, and the assembly work becomes easy.

(2) The positioning portion includes a recess 21a recessed from the outer surface of the first passenger seat side pivot shaft 21 toward the shaft center side, and a shaft center from the inner peripheral surface of the inserted portion 26a of the first drive lever 26. Since it includes a convex portion 26b that is convex toward the side and fits into the concave portion 21a, it is possible to determine a relative position in the rotation direction of each other at a specific position with a simple configuration without the need for a separate member.

(3) The first passenger seat side pivot shaft 21 has a rotating member fixing portion 21c in which an outer diameter becomes smaller toward the tip end side in the axial direction and a knurled portion 21b in close contact with the inserted portion 26a is formed. The relative rotation between the first passenger seat side pivot shaft 21 and the first drive lever 26 can be prevented by a configuration different from that of the positioning portion (recessed portion 21a and convex portion 26b). Therefore, for example, the strength of the positioning portion (recessed portion 21a and the convex portion 26b) can be reduced as compared with the configuration in which the relative rotation is prevented only by the positioning portion (recessed portion 21a and the convex portion 26b), and the positioning portion (recessed portion 21a) can be reduced. And the convex portion 26b) can be configured as long as the relative position can be simply determined.

(4) Since the inserted portion 26a has a plurality of extending portions 26c extending toward the center of the axis and in close contact with the knurled portion 21b in the circumferential direction, the inserted portion 26a and the knurled portion 21b are part of the circumferential direction. It can be made to adhere only at (multiple places). Since the inserted portion 26a and the knurled portion 21b are configured to be in close contact with each other only in a part in the circumferential direction, the torque for preventing relative rotation (in other words, the torque for starting idling) is set to an appropriate value. It becomes possible to do.

Specifically, the first passenger seat side pivot shaft 21 of the present embodiment is coaxially arranged on the outside of the second passenger seat side pivot shaft 22 which is a heterogeneous pivot shaft for different purposes, and is a second passenger seat side pivot. Since it constitutes a double shaft together with the shaft 22, its outer diameter becomes large. When the outer diameter of the pivot shaft (first passenger seat side pivot shaft 21) is large, the torque that prevents relative rotation when the inserted portion and the knurled portion 21b are in close contact with each other around the entire circumference (in other words, the torque that starts idling). ) Is likely to be too large, but it is possible to set this to an appropriate value. If the torque that prevents relative rotation (in other words, the torque that starts idling) becomes too large, for example, when an excessive force is applied to the first wiper arm 35, that force is applied to the first passenger side pivot. There is a risk that the link mechanism and other members will be damaged by being transmitted to the first motor 11 side of the shaft 21, but this can be avoided.

The above embodiment may be modified as follows.
-In the above embodiment, the positioning portion is the concave portion 21a and the convex portion 26b, but for determining the relative position of the first passenger seat side pivot shaft 21 and the first drive lever 26 in the rotational direction to a specific position. If it is configured, it may be changed to another positioning unit.

For example, it may be changed as shown in FIGS. 10, 11 (a) and 11 (b). In this example, the positioning portion is provided on the first passenger seat side pivot shaft 51 and is engaged with the shaft side engaging portion 51a in the rotation direction, and is provided on the first drive lever 52 and is engaged with rotation in the rotation direction. It is a side engaging portion 52a. The vehicle wiper device includes an intervening member 53 that engages with the shaft-side engaging portion 51a in the rotational direction and also engages with the rotary-side engaging portion 52a in the rotational direction.

Specifically, first, the first passenger seat side pivot shaft 51 of this example has an outer diameter (distance from the center of the shaft) of the first passenger seat side pivot shaft 51 becoming smaller toward the tip end side in the axial direction, and the first drive lever 52. It has a rotating member fixing portion 51d in which a knurled portion 51b in close contact with the inserted portion 52b and a non-knurled portion 51c having a shape in which the knurled portion 51b is cut and having an outer diameter smaller than that of the knurled portion 51b are formed. In this embodiment, six knurled portions 51b and six non-knurled portions 51c are alternately formed in the circumferential direction. The knurled portion 51b is formed with small irregularities, and is a resistance when the inserted portion 52b in close contact tries to rotate relative to each other. The knurled portion 51b of the present embodiment has a large number of vertical grooves (not shown) arranged side by side in the circumferential direction along the axial direction. Further, the first passenger seat side pivot shaft 51 has a male screw portion 51e (screw groove is not shown) having an outer diameter smaller than the outer diameter of the tip portion of the rotating member fixing portion 51d at the tip portion thereof.

The shaft-side engaging portion 51a is recessed from the outer surface toward the shaft center side along the axial direction in the range from the tip end portion to the base end portion of the male screw portion 51e. The depth of the shaft-side engaging portion 51a is set sufficiently deeper than the thread groove of the male screw portion 51e.

Further, the rotation side engaging portion 52a of the first drive lever 52 is provided in a pair in the circumferential direction so as to be convex in the axial direction from the axial end surface of the inserted portion 52b.
The intervening member 53 is formed in an annular shape, extends from the inner peripheral surface thereof toward the center of the shaft, and fits into the shaft-side engaging portion 51a. It has a second engaging piece 53b that extends toward and fits between the pair of rotating side engaging portions 52a.

Then, the first assistant is placed in the inserted portion 52b while the first engaging piece 53a is arranged so as to fit into the shaft side engaging portion 51a and the second engaging piece 53b fits between the pair of rotating side engaging portions 52a. By inserting the seat-side pivot shaft 51 (rotating member fixing portion 51d), the relative positions of the first passenger-side pivot shaft 51 and the first drive lever 52 in the rotational direction are determined to be specific positions. Then, by screwing the nut 42 into the male screw portion 51e, the knurled portion 51b is brought into close contact (pressing contact) with the inserted portion 52b, and the first passenger seat side pivot shaft 51 and the first drive lever 52 are relative to each other. It is fixed so that it cannot rotate.

Even in this way, the relative positions of the first passenger seat side pivot shaft 51 and the first drive lever 52 in the rotational direction can be positioned with high accuracy via the intervening member 53, and the assembling work becomes easy.

In the above embodiment, the first passenger seat side pivot shafts 21 and 51 have rotating member fixing portions 21c and 51d in which the knurled portions 21b and 51b are formed, but the present invention is not limited to this, and only by the positioning portion. It may be configured to prevent the relative rotation between the first passenger seat side pivot shaft and the first drive lever.

-In the above embodiment, the inserted portions 26a and 52b and the knurled portions 21b and 51b are brought into close contact with each other only in a part (multiple locations) in the circumferential direction, but the present invention is not limited to this and the entire circumference or almost the entire circumference is not limited to this. It may be configured to be in close contact with each other.

-In the above embodiment, the inserted portions 26a and 52b are assumed to penetrate, but the present invention is not limited to this, and a concave inserted portion may be used as long as the pivot shaft can be inserted.
In the above embodiment, the first passenger seat side pivot shaft 21 is coaxially arranged outside the second passenger seat side pivot shaft 22 which is a different type of pivot shaft for different purposes, together with the second passenger seat side pivot shaft 22. Although the dual axis is configured, the present invention is not limited to this, and may be embodied in a configuration in which a single pivot axis to which the wiper arm is simply fixed is provided instead of the dual axis. In this case, the wiper arm (arm head) constitutes the rotating member, and the relative position of the pivot shaft and the wiper arm in the rotational direction can be positioned at a specific position with high accuracy, and the assembling work becomes easy. ..

-In the above embodiment, the control unit 41 drives and controls the first motor 11 and the second motor 12 so that the same expansion drive is normally performed during both forward and backward movements, but the present invention is limited to this. However, for example, different controls may be performed at the time of forward movement and at the time of recovery. Further, the drive control different from the above-described embodiment (enlarged drive) may be performed at times other than the normal time such as when snow is accumulated.

In the above embodiment, the first axis L1 of the first drive lever 26 and the second axis L2 of the second drive lever 29 are arranged on the same straight line L, but the present invention is not limited to this, and for example, the first 1 The first axis L1 of the drive lever and the second axis L2 of the second drive lever may be arranged at positions where they are offset from each other.

The control unit 41 that drives and controls the first motor 11 and the second motor 12 of the above embodiment may be mounted as an ECU on the vehicle side, or at least one of the first motor 11 and the second motor 12, for example. It may be a control unit mounted on the second motor 12.

2 ... Vehicle wiper device, 11 ... First motor (drive source), 21,51 ... First passenger seat side pivot shaft (pivot shaft) constituting a part of the double shaft, 21a ... Recessed portion (positioning portion), 21b , 51b ... Knurled portion, 21c, 51d ... Rotating member fixing portion, 22 ... Second passenger seat side pivot shaft (different type pivot shaft) constituting a part of the double shaft, 26, 52 ... First drive lever (rotating member) ), 26a, 52b ... Inserted part, 26b ... Convex part (positioning part), 26c ... Extension part, 51a ... Shaft side engaging part (positioning part), 51c ... Non-knurled part, 52a ... Rotating side engaging part (Positioning unit), 53 ... Intervening member.

Claims (1)

A pivot shaft that is rotated by the driving force of the drive source,
A vehicle wiper device comprising an inserted portion into which the pivot shaft is inserted and a rotating member fixed so as not to rotate relative to the pivot shaft.
The pivot shaft and the rotating member are provided with a positioning unit for determining a relative position in a rotational direction with each other at a specific position.
The positioning portion includes a concave portion recessed from the outer surface of the pivot shaft toward the center of the shaft, and a convex portion convex from the inner peripheral surface of the inserted portion toward the center of the shaft and fitted into the concave portion. Including
The pivot shaft has a rotating member fixing portion in which an outer diameter becomes smaller toward the tip end side in the axial direction and a knurled portion that is in close contact with the inserted portion is formed.
The inserted portion has a plurality of extending portions extending from the inner peripheral surface toward the center of the axis and in close contact with the knurled portion at intervals in the circumferential direction, and the inserted portion and the knurled portion have a plurality of extending portions. It is configured to be in close contact only in a part of the circumferential direction.
The recess is provided in the rotating member fixing portion on which the knurled portion is formed.
The convex portion is provided on the inner peripheral surface of the inserted portion, and is spaced between the extending portions adjacent to each other in the circumferential direction and between the extending portions adjacent to each other in the circumferential direction. A vehicle wiper device characterized by being provided with a space.

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