JP2005145223A - Wiper device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To obtain a wiper device capable of being miniaturized and improving arrangement flexibility and arrangement posture flexibility of a wiper motor. <P>SOLUTION: In the wiper device 10, the wiper motor 80 is disposed on one side of a motor bracket part 28 in an axial direction of a first pivot shaft 20, and an output shaft 86 is projected to the other side of the motor bracket part 28 passing through the motor bracket part 28. In the wiper motor 80, the section shape of the motor body 82 is formed to be flat-shaped allowing the axial direction of the output shaft 86 (the axial direction of the first pivot shaft 20) to be a short side direction. A predetermined air gap 136 is secured between the motor body 82, a frame member 16, and a connecting shaft 32. In result, the motor body 82 does not interfere with the frame member 16 even when the motor body 82 and the frame member 16 are overlappedly disposed in the axial direction of the output shaft 86. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a module type (so-called frame-integrated type) wiper device in which a pivot holder that supports a pivot shaft is integrally connected by a frame.

  In a wiper device for wiping a windshield glass of an automobile, a wiper arm attached to a pivot shaft reciprocates within a predetermined range by rotating the pivot shaft, thereby wiping raindrops and the like on the windshield glass surface.

  Here, in such a wiper device, for example, in a vehicle including a pair of wiper arms and blades, pivot shafts are provided on both sides in the vehicle width direction, and a pivot holder (wiper bracket) for supporting these is also provided in the vehicle body. Are fixed on both sides in the vehicle width direction. Further, the pair of pivot holders are connected by a frame, and a wiper motor as a drive source is fixed to a motor bracket fixed to the frame or a bracket portion formed integrally with one pivot holder. In addition, there is a so-called module-type wiper device (see, for example, Patent Document 1).

  Such a module-type wiper device constitutes a motor & link assembly as a whole, so that various settings such as a stop position and a rotation angle can be set with high accuracy as the device, and it is relatively easy. And a compact configuration.

  By the way, in such a wiper device, as described above, the wiper motor is fixed to the motor bracket fixed to the frame or the bracket portion of one pivot holder, but the wiper motor is a heavy object with a large mass. If the pair of pivot holders are arranged away from the virtual straight line connecting the fixed parts to the vehicle body, a rotational moment around the virtual straight line connecting the fixed parts is generated when the wiper device is operated. For this reason, it is preferable that the wiper motor is disposed as close as possible to a virtual straight line connecting the fixed portions of the pair of pivot holders to the vehicle body. On the other hand, the frame for connecting the pair of pivot holders to each other is preferably formed in a straight line so as to connect the two pivot holders as linearly as possible from the viewpoint of reduction in size and weight and cost. Therefore, in such a wiper device, it is preferable to dispose both the frame and the wiper motor close to a virtual straight line connecting the pair of pivot holders.

  However, since the wiper motor has a cylindrical motor body, when the motor body is disposed close to the frame, the position where the motor body does not interfere with the frame or the link mechanism, for example, the frame along the radial direction of each pivot shaft The position of the wiper motor is limited to the side of the frame or the side of the frame along the axial direction of each pivot shaft.

  Here, when the wiper motor is arranged on the side of the frame along the radial direction of each pivot shaft, the position of the center of gravity of the wiper motor is greatly separated from the virtual straight line connecting the respective fixed portions of both pivot holders. In this case, as described above, a rotational moment around an imaginary straight line connecting the fixed portions of both pivot holders is generated, so that the strength of each fixed portion needs to be improved. In addition, since it is necessary to prevent the wiper motor from interfering with the link mechanism, the degree of freedom of arrangement and the attitude of the wiper motor are extremely limited.

On the other hand, when the wiper motor is arranged on the side of the frame along the axial direction of each pivot shaft, the configuration along the pivot axis direction of the entire wiper device (the output shaft axial direction of the wiper motor) becomes large. Therefore, it becomes difficult to secure a mounting space in a small vehicle or the like.
JP 09-175336 A

  The present invention has been made in consideration of the above-described facts, and an object of the present invention is to obtain a wiper device that can reduce the size of the device and can improve the degree of freedom of arrangement and the orientation of the wiper motor.

  In order to solve the above-described problem, a wiper device according to a first aspect of the present invention includes a wiper motor that decelerates and outputs the rotation of a motor body by a speed reduction unit, and is fixed to a vehicle body, and a wiper arm is fixed to a tip. A first pivot holder and a second pivot holder which rotatably support the first pivot shaft and the second pivot shaft, a frame member which connects the first pivot holder and the second pivot holder, and an output shaft of the wiper motor; A link mechanism that connects the first pivot shaft and the second pivot shaft, converts the rotational motion of the output shaft into reciprocating rotational motion of the first pivot shaft and the second pivot shaft, and transmits the link mechanism. In the wiper device provided, the first pivot holder has a support portion for supporting the first pivot shaft and the wiper motor fixed thereto. The wiper motor is disposed on one side of the motor bracket portion in the axial direction of the first pivot shaft, and the output shaft passes through the motor bracket portion and the motor bracket portion. And the motor body has a flat cross-sectional shape with the output shaft axis direction being the short direction.

  In the wiper device according to the first aspect, the first pivot holder and the second pivot holder that rotatably support the first pivot shaft and the second pivot shaft are connected to each other by a frame member. Further, the wiper motor is fixed to a motor bracket portion provided in the first pivot holder, and is in an assembled state as a whole.

  Here, in the present wiper device, the wiper motor is disposed on one side of the motor bracket portion in the first pivot axis direction, and the output shaft passes through the motor bracket portion and projects to the other side of the motor bracket portion. . Furthermore, the wiper motor has a flat cross-sectional shape in which the motor body has a short direction in the axial direction of the output shaft (the direction of attachment to the motor bracket portion, the axial direction of the first pivot shaft). As a result, the dimension in the output shaft direction of the wiper motor is reduced, so that the space occupied in the first pivot axis direction of the wiper motor arranged on one side of the motor bracket portion can be reduced, and the overall configuration of the wiper device is the same as the conventional wiper device. Compared to the first pivot axis direction, it can be made small and slim (thinned).

  In addition, as described above, the wiper motor has a flat cross-sectional shape in which the motor body has a short direction in the axial direction of the output shaft (mounting direction to the motor bracket portion). Even when the main body and the frame member are arranged so as to overlap (arrange), the motor main body does not interfere with the frame member. Thereby, the freedom degree of arrangement | positioning of a wiper motor and the freedom degree of an arrangement | positioning attitude | position improve.

  Thus, in the wiper device according to the first aspect, the size of the device can be reduced, and the degree of freedom in the arrangement and the orientation of the wiper motor can be improved.

  According to a second aspect of the present invention, there is provided a wiper device that decelerates and outputs the rotation of a motor body by a speed reduction portion, and a first pivot shaft and a second pivot shaft that are each fixed to a vehicle body and having a wiper arm fixed to the tip. First pivot holder and second pivot holder for rotatably supporting each other, a frame member connecting the first pivot holder and the second pivot holder, an output shaft of the wiper motor, the first pivot shaft, and A wiper device comprising: a link mechanism that connects the second pivot shaft and converts the rotational motion of the output shaft into a reciprocating rotational motion of the first pivot shaft and the second pivot shaft; Is fixed to the frame member via a motor bracket member and in the axial direction of the first pivot shaft. The motor bracket member is disposed on one side, the output shaft passes through the motor bracket member and protrudes to the other side, and the motor body has a flat cross-sectional shape with the output shaft axis direction being the short direction It is said that it is said.

  According to a second aspect of the present invention, the first pivot holder and the second pivot holder that rotatably support the first pivot shaft and the second pivot shaft are connected to each other by a frame member. The wiper motor is fixed to the frame member via a motor bracket member, and is in an assembled state as a whole.

  Here, in the present wiper device, the wiper motor is disposed on one side of the motor bracket member in the first pivot axis direction, and the output shaft passes through the motor bracket member and projects to the other side of the motor bracket member. . Further, the wiper motor has a flat cross-sectional shape in which the motor body has a short direction in the axial direction of the output shaft (attachment direction to the motor bracket member, axial direction of the first pivot shaft). As a result, the output shaft direction dimension of the wiper motor is reduced, so that the space occupied in the first pivot axis direction of the wiper motor arranged on one side of the motor bracket member can be reduced, and the entire configuration of the wiper device is compared with the conventional wiper device. Compared to the first pivot axis direction, it can be made small and slim (thinned).

  In addition, as described above, the wiper motor has a flat cross-sectional shape in which the motor main body has a short direction in the axial direction of the output shaft (attachment direction to the motor bracket member). Even when the main body and the frame member are arranged so as to overlap (arrange), the motor main body does not interfere with the frame member. Thereby, the freedom degree of arrangement | positioning of a wiper motor and the freedom degree of an arrangement | positioning attitude | position improve.

  Thus, in the wiper device according to the second aspect, the size of the device can be reduced, and the degree of freedom of arrangement and the degree of freedom of arrangement of the wiper motor are improved.

  The wiper device according to a third aspect of the present invention is the wiper device according to the first or second aspect, wherein the output shaft of the wiper motor is the same as each of the tips of the first pivot shaft and the second pivot shaft. It is characterized by protruding to the side.

  In the wiper device according to claim 3, the output shaft of the wiper motor projects through the motor bracket portion or the motor bracket member and protrudes in the protruding direction of the first pivot shaft and the second pivot shaft (each tip side, wiper arm side). Yes. In other words, the wiper motor is disposed on the side opposite to the protruding direction of each pivot shaft (each tip side, wiper arm side) with respect to the motor bracket portion or the motor bracket member.

  Therefore, in a state where the wiper device is mounted on the vehicle body, the wiper motor is disposed further inside the vehicle body than the motor bracket portion or the motor bracket member disposed inside the vehicle body. A sufficiently large distance can be secured. Thus, for example, even when a collision object collides with the vehicle body outer plate around the wiper motor and the vehicle body outer plate is deformed or damaged during a vehicle collision, the distance until the collision object reaches the highly rigid wiper motor is sufficiently large. Since it can be ensured, the impact load can be reduced by deformation of the outer plate of the vehicle body and the impact received by the collision object can be reduced. Moreover, the impact load input to the wiper motor can be sufficiently reduced.

  The 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 wiper motor is in the axial direction of the first pivot shaft with respect to the frame member. It is characterized by being arranged on the opposite side to the link mechanism.

  In the wiper device according to claim 4, in the axial direction of the first pivot shaft (the output shaft axial direction of the wiper motor), a link mechanism that is a component that operates spatially is disposed on one side of the frame member, and spatially A wiper motor, which is a stationary component, is disposed on the other side of the frame member. Therefore, when the wiper device is in operation, the wiper motor, which is a spatially stationary component, can be prevented from interfering with the operation of the link mechanism, which is a spatially operating component, and interference between the wiper motor and the link mechanism can be prevented. Therefore, the degree of freedom of the layout layout of the wiper motor is improved.

  A wiper device according to a fifth aspect of the present invention is the wiper device according to any one of the first to fourth aspects, wherein the second pivot holder has a support portion that pivotally supports the second pivot shaft. In addition, the first pivot holder and the second pivot holder each have an extending portion formed to extend from each of the support portions along a radial direction of the first pivot shaft or the second pivot shaft, And it is fixed to a vehicle body via the said extension part, It is characterized by the above-mentioned.

  6. The wiper device according to claim 5, wherein the first pivot holder has an extending portion that extends from the support portion along the radial direction of the first pivot shaft, and the second pivot holder includes the second pivot shaft. The first pivot holder and the second pivot holder are fixed to the vehicle body via the respective extending portions. For this reason, in a state in which the wiper device is mounted on the vehicle body (a state in which the first pivot shaft and the second pivot shaft protrude outside the vehicle body), each support portion that supports the first pivot shaft and the second pivot shaft is mounted on the vehicle body. Can be placed close to. This stabilizes the mounting position accuracy of the first pivot shaft and the second pivot shaft, which are the pivot shafts of the wiper arm.

  A wiper device according to a sixth aspect of the present invention is the wiper device according to any one of the first to fifth aspects, wherein the wiper motor is configured such that the motor body overlaps the frame member in the axial direction of the output shaft. It is characterized by being arranged.

  In the wiper device according to the sixth aspect, since the motor main body is disposed so as to overlap (align) the frame member in the axial direction of the output shaft, the space around the frame member is not eroded unnecessarily. In addition, since the motor body has a flat shape in which the axial direction of the output shaft is the short direction, the device in the axial direction of the first pivot shaft (the output shaft axial direction of the wiper motor) even if it is disposed overlapping the frame member Since the overall dimensions can be set small, it is easy to secure a mounting space in a small vehicle or the like.

  The wiper device according to a seventh aspect of the present invention is the wiper device according to any one of the first to sixth aspects, wherein the wiper motor is configured such that the motor body is on the side of the speed reduction portion in the radial direction of the output shaft. And the rotation axis of the motor main body is arranged orthogonal to the output shaft.

  In the wiper device according to claim 7, the wiper motor has a flat motor body with the axial direction of the output shaft as a short direction, arranged on the side of the speed reduction portion in the radial direction of the output shaft. The rotating shaft and the output shaft are disposed orthogonally to each other (the motor body and the speed reduction portion are disposed side by side in the radial direction of the output shaft). For this reason, since the thickness dimension of the wiper motor along the axial direction of the output shaft (the axial direction of the first pivot shaft) can be further reduced, the overall configuration of the wiper device in the axial direction of the first pivot shaft is further increased. It can be downsized.

[First Embodiment]
FIG. 1 is a front view showing the overall configuration of a wiper device 10 according to a first embodiment of the present invention. FIG. 2 is a plan view showing the overall configuration of the wiper device 10. Further, in FIG. 3, the entire configuration of the wiper motor 10 is shown in a right side view.

  The wiper device 10 includes a first pivot holder 12, a second pivot holder 14, and a frame member 16, and the module type in which the first pivot holder 12 and the second pivot holder 14 are configured integrally with the frame member 16. This is a wiper device (so-called frame integrated type).

  The first pivot holder 12 is formed by die casting using an aluminum alloy or injection molding using a resin material, and has a support portion 18 as shown in FIG. The support portion 18 is formed in a cylindrical shape, and the first pivot shaft 20 is inserted through the support portion 18 so as to be rotatably supported. A wiper arm & blade (not shown) is attached to the tip of the first pivot shaft 20 (the upper end in FIGS. 1 and 3 and the end on the paper surface side in FIGS. 2 and 4). The wiper arm & blade is reciprocally rotated within a predetermined range by the rotation of the shaft 20.

  Further, the support portion 18 is integrally provided with an extending portion 22 along the radial direction of the first pivot shaft 20. The extending part 22 extends long toward the side opposite to the frame member 16 (left side in FIGS. 1 and 2), and a mounting hole 24 is provided at the tip of the extending part. A support grommet 26 made of an elastic material such as rubber is attached to the attachment hole 24, and the first pivot holder 12 is fixed to the vehicle body by attachment bolts inserted through the support grommet 26. That is, the support grommet 26 supports the first pivot holder 12 in a floating manner with respect to the vehicle body.

  Further, the first pivot holder 12 is integrally provided with a motor bracket portion 28 on the second pivot holder 14 side of the support portion 18 (on the frame member 16 side, opposite to the mounting hole 24). A wiper motor 80 described later is fixed to the motor bracket portion 28.

  Further, the first pivot holder 12 is integrally provided with a connecting shaft 32 on the second pivot holder 14 side (the frame member 16 side, opposite to the mounting hole 24) of the motor bracket portion 28. The connecting shaft 32 is a solid shaft (peeling shaft) having a circular cross section, and the tip portion thereof is a connecting portion 34 that is fitted and connected to the frame member 16. A plurality of concave portions 36 (see FIG. 4) are formed in the connecting portion 34.

  On the other hand, like the first pivot holder 12, the second pivot holder 14 is formed by die casting with an aluminum alloy or injection molding with a resin material. As shown in FIG. doing. The support portion 38 is formed in a cylindrical shape, and the second pivot shaft 40 is inserted therethrough so as to rotatably support it. A wiper arm and blade (not shown) are attached to the tip of the second pivot shaft 40 (the upper end in FIGS. 1 and 3 and the end on the paper surface side in FIGS. 2 and 5). The wiper arm & blade reciprocates within a predetermined range by the rotation of the shaft 40.

  In addition, the support portion 38 is integrally provided with an extending portion 42 along the radial direction of the second pivot shaft 40. The extending part 42 extends long toward the side opposite to the frame member 16 (the right side in FIGS. 1 and 2), and a mounting hole 44 is provided at the tip of the extending part. A support grommet 26 made of an elastic material such as rubber is attached to the attachment hole 44 in the same manner as the attachment hole 24 of the first pivot holder 12, and the second pivot holder is attached by an attachment bolt inserted through the support grommet 26. 14 is a structure fixed to a vehicle body. That is, the support grommet 26 supports the second pivot holder 14 in a floating manner with respect to the vehicle body.

  Further, the second pivot holder 14 is integrally provided with a connecting shaft 46 on the first pivot holder 12 side of the support portion 38 (the frame member 16 side, opposite to the mounting hole 44). The connection shaft 46 is a solid shaft (peeling shaft) having a circular cross section, similar to the connection shaft 38 of the first pivot holder 12, and its distal end is a connection portion 48 that is fitted and connected to the frame member 16. ing. A plurality of recesses 36 (see FIG. 5) are formed in the connecting portion 48 as in the connecting portion 34.

  The connecting shaft 32 of the first pivot holder 12 and the connecting shaft 46 of the second pivot holder 14 are not limited to a solid shaft having a circular cross section, and may be formed as a hollow shaft having an annular cross section.

  On the other hand, the frame member 16 is a pipe frame having an annular cross section, and is formed in a straight line not subjected to bending. Both end portions in the longitudinal direction of the frame member 16 are connecting portions 50 and 52 corresponding to the connecting portions 34 and 46 of the connecting shafts 32 and 46, and the connecting portion 50 is fitted to the connecting portion 32 and the connecting portion. 52 is fitted to the connecting portion 46, and in this state, the connecting portions 50 and 52 are caulked corresponding to the recesses 36, and are connected and fixed to the connecting portions 32 and 46.

  Thereby, the first pivot holder 12 and the second pivot holder 14 are connected to each other by the frame member 16. In the wiper device 10, the motor bracket portion 28 and the frame member 16 of the first pivot holder 12 are connected to the mounting hole 24 and the second pivot of the extension portion 22 of the first pivot holder 12 in a plan view shown in FIG. It arrange | positions along the virtual straight line A which connects the attachment hole 44 of the extension part 42 of the holder 14, and is arrange | positioned in proximity to this virtual straight line A in the front view shown in FIG.

  On the other hand, a pivot lever 56 and a pivot lever 58 constituting the link mechanism 54 are fixed to the respective base end portions of the first pivot shaft 20 and the second pivot shaft 40 described above. The respective distal end portions of the pivot lever 56 and the pivot lever 58 are rotatably connected to both longitudinal end portions of the link rod 64 via the ball joint 60 and the ball joint 62, respectively. Furthermore, one end of a link rod 68 is rotatably connected to the tip of the pivot lever 58 of the second pivot shaft 40 via a ball joint 66. The other end of the link rod 68 is rotatably connected to the tip of a crank arm 70 fixed to an output shaft 86 of a wiper motor 80 described later via a ball joint 72.

  Here, the wiper motor 80 described above includes a motor main body 82, a speed reducing portion 84, and an output shaft 86, as shown in FIG. The yoke housing 88 of the motor main body 82 is formed in a bottomed cylindrical shape whose one end in the axial direction is drawn, and the opening side is integrated with the side of the housing 90 of the speed reduction portion 84 in the radial direction of the output shaft 86. Is attached.

  As shown in FIG. 7, the yoke housing 88 has a flat cross-sectional shape in which the axial direction of the output shaft 86 is a short direction, and the width dimension (major diameter) along the radial direction of the output shaft 86. Compared to B, the thickness dimension (minor axis) C along the axial direction (vertical direction in FIG. 6) of the output shaft 86 is set shorter. The short diameter C is set to be slightly smaller than the thickness dimension D of the housing 90 along the axial direction of the output shaft 86.

  Although not shown, a bearing is disposed on the bottom wall of the yoke housing 88, and an insulating resin end housing is fixed to the opening side of the yoke housing 88. A bearing is also provided in the central portion of the end housing, and the rotation shaft 102 of the armature 100 accommodated and disposed in the yoke housing 88 is rotatably supported. A magnet 103 is fixed to the inner peripheral wall of the yoke housing 88 facing the armature 100. Further, although not shown, a brush is held on the end housing described above via a brush case, and this brush is pressed against the commutator of the armature 100. Further, a coupling pigtail is drawn out from the brush, and the tip of the pigtail is connected to a connection line for power feeding.

  The rotating shaft 102 of the motor body 82 (armature 100) is connected to the worm gear 114. One end of the worm gear 114 is rotatably supported by the housing 90 via a bearing 116, and the other end is rotatably supported by the housing 90 via a bearing 118. The worm gear 114 is engaged with the worm wheel 120.

  An output shaft 86 is fixed to the shaft portion of the worm wheel 120, and the output shaft 86 is rotatably supported by the housing 90, so that the worm wheel 120 can rotate around the output shaft 86. Therefore, the rotation shaft 102 and the output shaft 86 of the motor main body 82 are in a perpendicular relationship, and when the rotation shaft 102 of the motor main body 82 rotates, the output shaft 86 rotates at a reduced speed via the worm gear 114 and the worm wheel 120. It is the structure to do.

  The output shaft 86 is rotatably supported by a cylindrical bearing portion 122 projecting from the surface side of the housing 90 (upper side in FIG. 7 and front side of the paper in FIG. 8). Projecting from the portion 122 toward the surface side of the housing 90.

  The housing 90 is provided with a support pin 124 on one side along the radial direction of the output shaft 86 so as to be orthogonal to the rotary shaft 102 and the output shaft 86. A support grommet 126 made of an elastic material such as rubber is attached to the support pin 124.

  Further, the housing 90 has columnar mounting portions 128 for mounting the wiper motor 80 on both sides of the output shaft 86 (bearing portion 122) along the axial direction of the rotating shaft 102, respectively, along the axial direction of the output shaft 86. Projecting. A female thread is formed in the axial center portion of these attachment portions 128.

  Here, as shown in FIG. 4, the motor bracket portion 28 of the first pivot holder 12 described above is provided with the hole portion 130 and the hole portion 132 corresponding to the output shaft 86 of the wiper motor 80 and the mounting portions 128. . The wiper motor 80 is arranged on one side of the motor bracket portion 28 in the axial direction of the first pivot shaft 20 (in the first embodiment, opposite to the link mechanism 54), and the output shaft 86 is a motor. A bolt 134 inserted through the hole 132 in a state where it penetrates the hole 130 of the bracket part 28 and protrudes to the link mechanism 54 side (the same side as the protruding direction of the first pivot shaft 20 and the second pivot shaft 40). It is fixed to the motor bracket portion 28 by being screwed into the female screw of the mounting portion 128.

  Therefore, the wiper motor 80 is arranged such that the axial direction of the output shaft 86 is along the axial direction of the first pivot shaft 20. Further, the motor body 82 is in a state in which the axial direction of the rotating shaft 102 is substantially parallel to the longitudinal direction of the frame member 16 (along the radial direction of the first pivot shaft 20) and close to the frame member 16. Has been placed.

  In this state, as shown in FIG. 1, a predetermined gap 136 is secured between the motor main body 82, the frame member 16, and the connecting shaft 32 in the axial direction of the output shaft 86.

  In this state, as shown in FIG. 2, the support pins 124 (support grommets 126) provided on the housing 90 are arranged so as to protrude toward the opposite side of the frame member 16 (extension). (It is arranged at a position away from a virtual straight line A connecting the mounting hole 24 of the protruding portion 22 and the mounting hole 44 of the extending portion 42 along the radial direction of the output shaft 86). This support pin 124 (support grommet 126) is inserted into a positioning hole (not shown) as a reference position provided on the vehicle body side when the wiper device 10 is attached to the vehicle body. Thus, the wiper device 10 is positioned and supported on the vehicle body.

  In addition, the crank arm 70 of the link mechanism 54 described above is fixed to the distal end portion of the output shaft 86 that penetrates the motor bracket portion 28. As a result, the wiper motor 80 is actuated to rotate the crank arm 70, whereby the driving force is transmitted via the link rods 68, 64 and the pivot levers 56, 58, and the first pivot shaft 20 and the second pivot shaft 40. However, each is reciprocally rotated.

  Next, the operation of the first embodiment will be described.

  In the wiper device 10 configured as described above, the first pivot holder 12 and the second pivot holder 14 are connected to each other by the frame member 16, and the motor bracket portion 28 provided in the first pivot holder 12 includes a wiper motor. 80 is fixed and is in an assembled state as a whole. In this state, the support pin 124 (support grommet 126) provided in the housing 90 of the wiper motor 80 is positioned by being inserted into a positioning hole serving as a reference position on the vehicle body side, and the first pivot holder 12 and the second pivot. The wiper device 10 is fixed to the vehicle body below the windshield glass by the mounting bolts inserted into the support grommets 26 through the support grommets 26 mounted in the mounting holes 24 and 44 of the holder 14 (support pins 124). 3 points are supported by the extension part 22 and the extension part 42).

  Further, when the rotating shaft 102 of the wiper motor 80 rotates and the output shaft 86 rotates at a reduced speed via the speed reducing portion 84, the link mechanism 54 (the crank arm 70, the link rods 68 and 64, and the pivot levers 56 and 58) are used. The first pivot shaft 20 and the second pivot shaft 40 reciprocately rotate. As a result, the wiper arms and blades fixed to the tips of the first pivot shaft 20 and the second pivot shaft 40 reciprocate within a predetermined range to wipe out raindrops and the like on the windshield glass.

  Here, in the present wiper device 10, the wiper motor 80 is disposed on one side of the motor bracket portion 28 in the axial direction of the first pivot shaft 20, and the output shaft 86 penetrates the motor bracket portion 28 and the motor bracket portion 28. Protrudes on the other side. Further, in the wiper motor 80, the motor body 82 has a flat cross-sectional shape in which the axial direction of the output shaft 86 (the mounting direction to the motor bracket portion 28 and the axial direction of the first pivot shaft 20) is the short direction ( The output shaft 86 is thin in the axial direction). Accordingly, the dimension of the wiper motor 80 in the direction of the output shaft 86 can be reduced. More specifically, the motor dimension E (see FIG. 1) from the motor bracket portion 28 of the wiper motor 80 in the axial direction of the first pivot shaft 20 can be reduced. In addition, the thickness dimension F of the entire wiper device 10 in the axial direction of the first pivot shaft 20 can be reduced (thinned) as compared with the conventional wiper device.

  In addition, as described above, the wiper motor 80 has a cross-sectional shape of the motor main body 82 that is a flat shape in which the axial direction of the output shaft 86 (attachment direction to the motor bracket portion 28) is a short direction. A predetermined gap 136 is secured between the frame 82 and the frame member 16 and the connecting shaft 32. For this reason, even when the motor main body 82 and the frame member 16 are arranged so as to overlap (arrange) in the axial direction of the output shaft 86, the motor main body 82 does not interfere with the frame member 16. Thereby, the freedom degree of arrangement | positioning and the freedom degree of arrangement | positioning attitude | position of the wiper motor 80 are improved very much.

  Thus, in the wiper device 10 according to the first embodiment, the size of the device can be reduced, and the degree of freedom of arrangement and the degree of freedom of arrangement of the wiper motor 80 are improved.

  In the wiper device 10, the wiper motor 80 is disposed on the opposite side of the motor bracket portion 28 and the frame member 16 from the protruding direction (wiper arm side) of the first pivot shaft 20 and the second pivot shaft 40. Yes. Therefore, when the wiper device 10 is mounted on the vehicle body, the wiper motor 80 is disposed further inside the vehicle body than the motor bracket portion 28 disposed inside the vehicle body. A sufficiently large distance can be secured. As a result, for example, even when a collision object collides with the vehicle body outer plate around the wiper motor 80 and the vehicle outer plate is deformed or damaged in the event of a vehicle collision, the distance until the collision object reaches the highly rigid wiper motor 80 is sufficiently large. Therefore, the impact load can be reduced by the deformation of the outer plate of the vehicle body and the impact received by the collision object can be reduced. Moreover, the impact load input to the wiper motor 80 can be sufficiently reduced.

  Further, in the wiper device 10, a link mechanism 54, which is a spatially operating component, is arranged on one side of the frame member 16 in the axial direction of the first pivot shaft 20 (the axial direction of the output shaft 86 of the wiper motor 80). The wiper motor 80, which is a spatially stationary component, is disposed on the other side of the frame member 16. Therefore, when the wiper apparatus 10 is operated, the wiper motor 80 that is a spatially stationary component can be prevented from interfering with the operation of the link mechanism 54 that is a spatially activated component, and the wiper motor 80 is linked to the wiper motor 80. Since there is no possibility of interference with the mechanism 54, the degree of freedom in the layout of the wiper motor 80 is improved.

  Furthermore, in the wiper device 10, the first pivot shaft 20 and the second pivot shaft 40 that are the pivot shafts of the wiper arm are disposed so as to protrude outside the vehicle body when mounted on the vehicle body. The supporting portion 18 of the first pivot holder 12 and the supporting portion 38 of the second pivot holder 14 to be supported are extended portions 22 formed to extend along the radial direction of the first pivot shaft 20 and the second pivot shaft 40, 42, and is directly fixed to the vehicle body via the mounting holes 24 and 44 provided in the extending portions 22 and 42, so that the support portions 18 and 38 can be disposed close to the vehicle body. . This stabilizes the mounting position accuracy of the first pivot shaft 20 and the second pivot shaft 40 that are the rotation shafts of the wiper arm.

  Further, in the wiper device 10, the motor bracket portion 28 and the frame member 16 are fixed to the first pivot holder 12 and the second pivot holder 14 (attachment holes 24 and extension portions 42 of the extension portion 22). It is arranged along the virtual straight line A connecting the holes 44) and close to the virtual straight line A. In addition, the wiper motor 80, which is a heavy object with a heavy mass, has a motor body 82 having a flat shape, and its center of gravity is located close to the motor bracket portion 28 and the frame member 16. For this reason, the rotational moment generated around the imaginary straight line A connecting the fixed portions (the attachment hole 24 of the extension portion 22 and the attachment hole 44 of the extension portion 42) of the first pivot holder 12 and the second pivot holder 14 is reduced. be able to.

  Furthermore, in the wiper device 10, since the frame member 16 is a straight pipe frame that is not subjected to bending, a reduction in buckling deformation strength is prevented even though it is a long pipe material.

  As described above, in the wiper device 10 according to the first embodiment, the size of the device can be reduced, and the degree of freedom of arrangement and the degree of freedom of arrangement of the wiper motor 80 are improved.

  In the first embodiment, the motor bracket portion 28 is integrally provided on the first pivot holder 12 and the wiper motor 80 is fixed to the motor bracket portion 28. However, the present invention is not limited to this. A motor bracket member formed separately from the pivot holder may be fixed to the first pivot holder by, for example, rivets, bolts or welding, and the wiper motor 80 may be fixed to the motor bracket member. This also applies to the following embodiments.

  In the first embodiment, the motor body 82 of the wiper motor 80 is disposed close to the axial direction of the frame member 16. However, the configuration is not limited thereto, and the axial direction of the output shaft 86 is not limited thereto. The motor main body 82 and the frame member 16 may be arranged to overlap each other. In this case, the motor body 82 of the wiper motor 80 does not unnecessarily erode the space around the frame member 16, thereby further reducing the configuration around the frame member 16. It is easy to secure the mounting space.

  Next, another embodiment of the present invention will be described.

Note that components that are basically the same as those of the first embodiment are denoted by the same reference numerals as those of the first embodiment, and description thereof is omitted.
[Second Embodiment]
FIG. 9 is a plan view showing the overall configuration of the wiper device 150 according to the second embodiment.

  The wiper device 150 has basically the same configuration as the wiper device 10 according to the first embodiment, and includes a first pivot holder 152, a second pivot holder 14, and a frame member 16, and the first pivot. The holder 152 and the second pivot holder 14 are a module type (frame integrated type) wiper device configured integrally with the frame member 16.

  The first pivot holder 152 has basically the same configuration as that of the first pivot holder 12 according to the first embodiment, but the connecting shaft 154 has an intermediate portion in the longitudinal direction of the frame member 16. It is bent at a predetermined angle.

  For this reason, the motor bracket portion 156 and a part of the frame member 16 are linked to the virtual straight line G connecting the mounting hole 24 of the first pivot holder 152 and the mounting hole 44 of the second pivot holder 14. It protrudes toward the opposite side of the rod 64.

  The wiper motor 158 has basically the same configuration as that of the wiper motor 80 according to the first embodiment, but the positions of the two attachment portions 128 (not shown) for attaching the wiper motor provided in the speed reduction portion 84 are the positions of the wiper motor. The virtual straight line connecting these two attachment portions 128 is inclined at a predetermined angle with respect to the axial direction of the rotating shaft 102 of the motor main body 82. Therefore, the wiper motor 158 partially overlaps the frame member 16 in the axial direction of the output shaft 86 (the direction perpendicular to the paper surface in FIG. 9 and the axial direction of the first pivot shaft 20). Is arranged).

  In the wiper device 150 according to the second embodiment as well, as with the wiper device 10 according to the first embodiment, the size of the device can be reduced, and the degree of freedom of arrangement of the wiper motor 158 can be achieved. In addition, the degree of freedom of the arrangement posture is improved.

  In addition, in the wiper device 150, the motor body 82 of the wiper motor 158 has the frame member 16 in the axial direction of the output shaft 86 (not shown) (the direction perpendicular to the paper surface in FIG. 9, the axial direction of the first pivot shaft 20). Therefore, the motor body 82 does not unnecessarily erode the space around the frame member 16. Thereby, since the structure around the frame member 16 can be further reduced in size, it is easy to secure a mounting space even in a small vehicle or the like.

  Furthermore, since the wiper motor 158 can be arranged and set in a free posture overlapping the frame member 16, the position of the center of gravity of the wiper motor 158, which is a heavy mass, is arranged on the virtual straight line G or very close to it. The posture can be set. As a result, the rotational moment generated around the imaginary straight line G connecting the fixed portions (mounting holes 24, 44) of the first pivot holder 152 and the second pivot holder 14 which are fixed portions to the vehicle body is made zero or extremely small. And the gravity load on the support pin 124 can be reduced.

FIG.
It is a front view showing the whole wiper device composition concerning a 1st embodiment. It is a top view which shows the whole structure of the wiper apparatus which concerns on this 1st Embodiment. It is a right view which shows the whole structure of the wiper apparatus which concerns on this 1st Embodiment. It is a top view which shows the 1st pivot holder and 1st pivot axis | shaft which are the structural members of the wiper apparatus which concerns on this 1st Embodiment. It is a top view which shows the 2nd pivot holder and 2nd pivot axis | shaft which are the structural members of the wiper apparatus which concerns on this 1st Embodiment. It is a perspective view which shows the wiper motor which is a structural member of the wiper apparatus which concerns on this 1st Embodiment. It is an end view which shows the wiper motor which is a structural member of the wiper apparatus which concerns on this 1st Embodiment. It is a fragmentary sectional view which shows the wiper motor which is a structural member of the wiper apparatus which concerns on this 1st Embodiment. It is a top view which shows the wiper motor which is a structural member of the wiper apparatus which concerns on this 2nd Embodiment.

Explanation of symbols

  10..Wiper device, 12 .... first pivot holder, 14 .... second pivot holder, 16 .... frame member, 18 .... supporting part, 20 .... first pivot shaft, 22 .... extension part, 28 ..Motor bracket section, 38 ..Support section, 40 ..Second pivot shaft, 42 ..Extension section, 54 ..Link mechanism, 80 ..Wiper motor, 82 ..Motor body, 84. 86 .. Output shaft, 150 .. Wiper device, 152 .. First pivot holder, 156 .. Motor bracket part, 158 .. Wiper motor

Claims (7)

A wiper motor that decelerates and outputs the rotation of the motor body by the deceleration unit;
A first pivot holder and a second pivot holder, which are respectively fixed to the vehicle body and rotatably support a first pivot shaft and a second pivot shaft each having a wiper arm fixed to the tip;
A frame member connecting the first pivot holder and the second pivot holder;
The output shaft of the wiper motor, the first pivot shaft, and the second pivot shaft are connected, and the rotational motion of the output shaft is converted into the reciprocating rotational motion of the first pivot shaft and the second pivot shaft and transmitted. A link mechanism;
In a wiper device comprising
The first pivot holder includes a support portion that pivotally supports the first pivot shaft, and a motor bracket portion to which the wiper motor is fixed.
The wiper motor is disposed on one side of the motor bracket portion in the axial direction of the first pivot shaft, and the output shaft projects through the motor bracket portion to the other side of the motor bracket portion, and The motor body has a flat cross-sectional shape with the output shaft axis direction being the short direction,
A wiper device characterized by that. A wiper motor that decelerates and outputs the rotation of the motor body by the deceleration unit;
A first pivot holder and a second pivot holder, which are respectively fixed to the vehicle body and rotatably support a first pivot shaft and a second pivot shaft each having a wiper arm fixed to the tip;
A frame member connecting the first pivot holder and the second pivot holder;
The output shaft of the wiper motor, the first pivot shaft, and the second pivot shaft are connected, and the rotational motion of the output shaft is converted into the reciprocating rotational motion of the first pivot shaft and the second pivot shaft and transmitted. A link mechanism;
In a wiper device comprising
The wiper motor is fixed to the frame member via a motor bracket member, and is disposed on one side of the motor bracket member in the axial direction of the first pivot shaft so that the output shaft penetrates the motor bracket member. And the motor body has a flat cross-sectional shape with the output shaft axis direction being the short direction,
A wiper device characterized by that. The output shaft of the wiper motor protrudes on the same side as the tips of the first pivot shaft and the second pivot shaft.
The wiper device according to claim 1 or 2, characterized in that The wiper motor is disposed on the side opposite to the link mechanism in the axial direction of the first pivot shaft with respect to the frame member.
The wiper device according to any one of claims 1 to 3, wherein the wiper device is characterized in that: The second pivot holder has a support portion that pivotally supports the second pivot shaft,
The first pivot holder and the second pivot holder each have an extending portion that extends from each of the support portions along the radial direction of the first pivot shaft or the second pivot shaft, and It is fixed to the vehicle body via each extension part,
The wiper device according to any one of claims 1 to 4, wherein the wiper device is characterized in that: The wiper motor is arranged such that the motor body overlaps the frame member in the axial direction of the output shaft.
The wiper device according to any one of claims 1 to 5, wherein the wiper device is characterized in that: In the wiper motor, the motor body is disposed on the side of the speed reduction portion in the radial direction of the output shaft, and the rotation shaft of the motor body is disposed orthogonal to the output shaft.
The wiper device according to any one of claims 1 to 6, wherein the wiper device is characterized in that:

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