JP2007237942A - Wiper unit for vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a wiper unit for a vehicle preventing rain water, etc. from entering a vent hole provided on a gear case. <P>SOLUTION: A wiper motor 21 is fixed to a motor bracket 32 to be connected to a pivot holder on an assistant seat side via a frame 41. A circumferential wall portion 62 is formed to the gear case 25 of a speed reducer 23 provided on the wiper motor 21 so as to project downward. The vent hole 61 for communicating the outside of the gear case 25 with the inside is opened at the tip end portion of the circumferential wall portion 62. A surrounding portion 63 is provided on the motor bracket 32. The rain water, etc. is prevented from entering the inside of the gear case 25 from the vent hole 61 by surrounding the tip end portion of the circumferential wall portion 62 by means of the surrounding portion 63. Further, a water preventing wall portion 71 is provided on the motor bracket 32. The waterproof ability of the vent hole 61 is furthermore improved by surrounding the outer peripheral surface of the circumferential wall portion 62 by means of the water preventing wall portion 71. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a vehicle wiper device in which a wiper shaft to which a wiper arm is attached is driven to swing by a wiper motor to wipe a windshield glass of the vehicle.

  A vehicle such as an automobile is provided with a wiper device for wiping off deposits such as rain, fog, snow, and splashes from the front car, which are attached to the windshield glass. Such a wiper device has a wiper arm to which a wiper blade is mounted at the tip, and a wiper shaft to which the wiper arm is attached. The wiper shaft is connected to a wiper motor via a link mechanism. The wiper motor has a motor body such as an electric motor and a speed reducer fixed to the motor body. A speed reduction mechanism is accommodated in the gear case of the speed reducer, and the rotation of the motor body is reduced to a predetermined number of rotations by the speed reduction mechanism. Then, it is transmitted to the link mechanism. Thus, when the wiper motor is operated, the wiper shaft is driven to swing by the wiper motor, and the wiper blade swings on the glass surface to wipe the glass surface.

  As a wiper device including two wiper arms such as a tandem type and a counter wiping type, for example, as shown in Patent Document 1, each pivot holder and a wiper motor that rotatably support a pair of wiper shafts corresponding to each wiper arm, A so-called frame-integrated type (modular type) in which the pipes are connected by a pipe-like frame is known. In this case, the wiper motor is fixed to the motor bracket, and is fixed to the frame via the motor bracket.

By the way, in a wiper motor including a motor body and a speed reducer, when the air in the gear case is heated by the heat generated by the motor body, a pressure difference occurs between the inside and outside of the gear case, which places a burden on the seal member of the gear case. For this reason, a wiper motor has been developed in which a vent hole is provided in a gear case of a reduction gear, and the pressure difference between the inside and outside of the gear case is eliminated by communicating the inside and outside of the gear case through the vent hole. In this case, the wiper motor is fixed to the motor bracket so that the vent hole opens downward, thereby improving the waterproof property of the vent hole.
Japanese Patent Laid-Open No. 9-175336

  However, even if the wiper motor is fixed to the motor bracket so that the vent hole opens downward, rainwater that bounces off the vehicle body or the motor bracket may enter the gear case from the vent hole, and its waterproofness is sufficient. It was not something.

  An object of the present invention is to provide a vehicle wiper device that can prevent rainwater and the like from entering from a vent hole provided in a gear case.

  In the vehicle wiper device of the present invention, a wiper shaft to which a wiper arm is attached, a wiper motor that swings and drives the wiper shaft, a pivot holder that rotatably supports the wiper shaft, and a wiper motor fixed on the lower surface side of the wiper motor A vehicle wiper device for wiping a windshield glass of a vehicle, the motor wiper device including a motor bracket and a frame connecting the pivot holder and the motor bracket, wherein the rotation of the motor body is decelerated. And a reduction gear that is output to the gear case of the reduction gear, and is formed in the motor bracket, a peripheral wall portion that is formed to project downward and has a vent hole that communicates the inside and outside of the gear case at the tip portion, And an encircling portion that surrounds the distal end portion of the peripheral wall portion.

  The vehicle wiper device according to the present invention is characterized in that a waterproof wall portion surrounding the outer peripheral surface of the peripheral wall portion is provided on the motor bracket.

  The vehicle wiper device according to the present invention is characterized in that the waterproof wall portion is arranged to face the outer peripheral surface of the peripheral wall portion with a predetermined interval.

  The vehicle wiper device according to the present invention is characterized in that a drainage hole is provided in the motor bracket.

  The wiper device for a vehicle according to the present invention is characterized in that the drainage hole is provided below a tip portion of the peripheral wall portion.

  According to the present invention, the vent hole provided in the speed reducer is opened downward, and the front end portion of the peripheral wall portion where the vent hole opens is surrounded by the surrounding portion formed in the motor bracket. It is possible to block rainwater and the like scattered by the surrounding area. Therefore, it is possible to prevent rainwater and the like from being scattered in the opening of the vent hole, and thus it is possible to prevent rainwater and the like from entering the gear case from the vent hole.

  According to the present invention, since the waterproof wall portion surrounding the outer peripheral surface of the peripheral wall portion is provided on the motor bracket, rainwater or the like scattered toward the vent hole is blocked by the waterproof wall portion, thereby waterproofing the vent hole. The sex can be further enhanced.

  Furthermore, according to the present invention, the waterproof wall portion is arranged to be opposed to the peripheral wall portion with a predetermined interval, so that rainwater and the like are blocked by the complicated shape of the peripheral wall portion and the waterproof wall portion. Thus, the waterproof property of the vent hole can be further enhanced.

  Furthermore, according to the present invention, since the motor bracket is provided with the drainage hole, rainwater or the like accumulated in the motor bracket can be discharged to the outside from the drainage hole, and the waterproofness of the vent hole can be further enhanced.

  Furthermore, according to the present invention, the drainage hole is provided below the front end portion of the peripheral wall portion, so that rainwater and the like accumulated in the motor bracket can be discharged more effectively.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  FIG. 1 is an explanatory diagram showing an outline of a vehicle wiper device according to an embodiment of the present invention. The vehicle 11 shown in FIG. 1 is wiped with rainwater or the like adhering to a windshield 12 as a windshield glass. Therefore, a vehicle wiper device 13 (hereinafter referred to as a wiper device 13) is provided.

  The wiper device 13 has a wiper shaft 14a on the driver's seat side, ie, the DR side, and a wiper shaft 14b on the passenger side, ie, the AS side, disposed on the vehicle body 11a. The side or DR side wiper arm 15a is attached at its base end, and the passenger side or AS side wiper arm 15b is attached to the AS side wiper shaft 14b at its base end. Further, the wiper blade 16a on the driver's seat side, that is, the DR side is attached to the front end portion of the wiper arm 15a on the DR side, and the wiper blade 16b on the passenger side, that is, the AS side, is attached to the front end portion of the wiper arm 15b on the AS side. The wiper blades 16a and 16b are biased by a spring member (not shown) built in the wiper arms 15a and 15b and are in elastic contact with the windshield 12.

  The wiper arms 15a and 15b swing in the same direction between the lower inversion position on the lower side of the windshield 12 and the upper inversion position on the windshield 12 around the wiper shafts 14a and 14b. The blades 16a, 16b wipe the wiping ranges 12a, 12b on the windshield 12 to wipe the glass surface. In the resting state, as indicated by a two-dot chain line in FIG. 1, the wiper blades 16a and 16b are stopped at the lower inverted position. Thus, the wiper device 13 is of a so-called tandem type in which the DR-side wiper arm 15a and the AS-side wiper arm 15b operate in the same direction to perform wiping operations.

  2 is a perspective view showing details of the wiper device shown in FIG. 1, FIG. 3 is a side view of the wiper motor shown in FIG. 2, and FIG. 4 is a plan view showing the internal structure of the speed reducer shown in FIG. .

  The wiper device 13 is provided with a wiper motor 21 for driving the wiper shafts 14a and 14b to swing. As shown in FIG. 3, the wiper motor 21 has a motor body 22 (electric motor). The motor body 22 is a so-called brushed DC motor, and when a wiper switch (not shown) is turned on, the vehicle is mounted on the vehicle. A direct current is supplied from a power source (not shown) such as a battery that has been operated.

  A reduction gear 23 is fixed to the motor main body 22, and the rotation of the motor main body 22 is reduced to a predetermined rotational speed by the reduction gear 23 and output from the output shaft 24. As shown in FIG. 4, the speed reducer 23 has a gear case 25 made of aluminum die cast and a speed reduction mechanism 26 accommodated in the gear case 25. The speed reduction mechanism 26 includes a pair of worms 27a and 27b formed in opposite directions on the outer peripheral surface of the rotating shaft 22a of the motor body 22 protruding into the gear case 25, and a pair of worm wheels 28a engaged with the worms 27a and 27b. , 28b, a pair of pinions 29a, 29b provided integrally with these worm wheels 28a, 28b, and an output gear 31 meshing with these pinions 29a, 29b, and the rotation of the rotating shaft 22a in two stages The motor is decelerated and output from the output shaft 24. In addition, a cam plate (not shown) is mounted on the back surface of the output gear 31, and control such as automatic stop of the wiper motor 21 is mechanically performed by the cam plate.

  In the case shown in the figure, a DC motor with a brush is used as the motor body 22 and its operation control is mechanically controlled using a cam plate (not shown). For example, another type of motor such as a brushless motor may be used as the motor main body 22, and its operation control may be performed by a control device including a CPU, a memory, and the like.

  FIG. 5 is a perspective view showing details of the motor bracket shown in FIG. 2, and FIG. 6 is a plan view of the motor bracket shown in FIG. As shown in FIG. 2, the wiper device 13 is provided with a motor bracket 32. The motor bracket 32 is formed by aluminum die casting. As shown in FIGS. And a fixing portion 34.

  The motor fixing portion 33 is formed in a flat plate shape, and a through hole 35 is provided at a substantially central portion thereof, and three attachment holes 36 are provided around the through hole 35. Corresponding to these mounting holes 36, as shown in FIG. 3, the speed reducer 23 of the wiper motor 21 is provided with three mounting legs 37 (only two are shown in the figure). These mounting feet 37 are fixed to the motor fixing portion 33 by bolts (not shown) inserted through the corresponding mounting holes 36.

  The frame fixing portion 34 is formed in a semi-cylindrical shape extending along one side of the motor fixing portion 33. As shown in FIG. 2, a frame 41 is fixed to the frame fixing portion 34 by two bolts 38. ing. The frame 41 is formed in a hollow pipe shape, and is fixed to the frame fixing portion 34 at one end thereof.

  The motor bracket 32 is integrally formed with a pivot seat portion 42 on the driver's seat side, that is, on the DR side in order to rotatably support the wiper shaft 14a on the DR side. The pivot holder portion 42 includes a cylindrical portion 43 that protrudes upward on one end side of the frame fixing portion 34, and rotatably supports the wiper shaft 14 a on the DR side on the inner peripheral surface of the cylindrical portion 43. It has become. As described above, in the wiper device 13, the pivot holder portion 42 that rotatably supports the DR-side wiper shaft 14 a is formed integrally with the motor bracket 32.

  On the other hand, as shown in FIG. 2, a pivot holder 44 on the passenger seat side, that is, the AS side is fixed to the other end portion of the frame 41. The pivot holder 44 on the AS side includes a cylindrical portion 45. The AS wiper shaft 14b is rotatably supported on the inner peripheral surface 45.

  In this manner, in the wiper device 13, the DR side pivot holder portion 42 that rotatably supports the DR side wiper shaft 14a is formed integrally with the motor bracket 32 to which the wiper motor 21 is fixed, and the AS side wiper shaft is formed. The AS-side pivot holder 44 that rotatably supports 14b is formed separately from the motor bracket 32, and the motor bracket 32 and the AS-side pivot holder 44 are connected by a frame 41 to connect these members to a unit. It tries to become. That is, the wiper device 13 is a so-called frame-integrated type (modular type) in which the wiper motor 21, the motor bracket 32, the AS side pivot holder 44, and the like are unitized.

  As shown in FIG. 2, the motor bracket 32 is provided with mounting legs 46a and 46b integrally with the motor fixing part 33 or the frame fixing part 34, respectively, and the motor bracket 32 is provided with these mounting legs 46a and 46b. Are fixed to the vehicle body 11a by bolts (not shown). The AS-side pivot holder 44 is provided with two mounting legs 47a and 47b, and the AS-side pivot holder 44 is fixed to the vehicle body 11a by bolts (not shown) at these mounting legs 47a and 47b. It has become so. Thereby, the unitized wiper device 13 is fixed at a predetermined position of the vehicle body 11a. Each mounting leg 46a, 46b, 47a, 47b is fitted with a rubber bush 48, and is bolted through these bushes 48.

  As shown in FIG. 3, the output shaft 24 of the wiper motor 21 fixed to the motor bracket 32 protrudes to the back side of the motor bracket 32 through the through hole 35, and the tip of the output shaft 24 protrudes to the back side of the motor bracket 32. An output arm 51 is fixed to the part by a nut 52. Further, one end of a drive rod 53 is rotatably connected to the tip of the output arm 51 by a ball joint (spherical joint), and the other end of the drive rod 53 is connected to the AS side as shown in FIG. The AS drive lever 54b fixed to the wiper shaft 14b is rotatably connected by a ball joint (spherical joint). Further, one end of a connecting rod 55 is rotatably connected to the AS-side drive lever 54b by a ball joint (spherical joint), and the other end of the connecting rod 55 is fixed to the DR-side wiper shaft 14a. The drive lever 54a on the DR side is rotatably connected by a ball joint (spherical joint). As a result, when the wiper motor 21 is operated and the output arm 51 rotates, the rotation is transmitted to the AS-side drive lever 54b via the drive rod 53, and the AS-side wiper shaft 14b swings. At the same time, when the AS-side wiper shaft 14b swings, the swinging motion is transmitted to the DR-side drive lever 54a via the AS-side drive lever 54b and the connecting rod 55, and the DR-side wiper shaft 14a swings. To do.

  FIG. 7 is a bottom view of the gear case shown in FIG. 3 as seen from below, and FIG. 8 is a cross-sectional view showing the relationship between the air holes formed in the gear case and the motor bracket. As shown in FIG. 3 and FIG. 7, the gear case 25 of the speed reducer 23 is formed with a vent hole 61, and the air pressure generated inside the gear case 25 and the motor body 22 by communicating with the inside and outside of the gear case 25. To absorb the changes.

  The gear case 25 is integrally formed with a peripheral wall portion 62 that protrudes downward from the bottom surface of the gear case 25, and the vent hole 61 opens downward at the tip of the peripheral wall portion 62. As a result, even if the air inside the gear case 25 or the motor main body 22 is heated by the heat generated when the motor main body 22 is operated or the like, even if the heated air is cooled by the outside air or the like, The pressure difference between the inside and outside of the gear case 25 and the motor main body 22 can be eliminated by urging the inside and outside of the gear case 25 through 61.

  Note that “downward” in “the peripheral wall portion 62 projects downward” and “the vent hole 61 opens downward” refers to the lower side when the wiper device 13 is fixed to the vehicle body 11a. Means direction.

  On the other hand, as shown in FIGS. 5, 6, and 8, in the wiper motor 21, a surrounding portion 63 is formed in the motor bracket 32, and a front end portion of the peripheral wall portion 62 is surrounded by the surrounding portion 63. The waterproof property is improved to prevent the rainwater and the like from entering the inside of the gear case 25.

  The motor fixing portion 33 of the motor bracket 32 is formed with an attachment surface 64 in which the attachment hole 36 is formed, an inclined surface 65 that is continuous with the attachment surface 64 and is inclined downward, and is continuous with the inclined surface 65. A lowermost surface 66 serving as the lowermost portion of the motor bracket 32 is provided, and the surrounding portion 63 is formed in a shape in which a part of the inclined surface 65 is cut away. That is, the surrounding portion 63 includes an opposing surface 63 a formed in parallel with the mounting surface 64 and the lowermost surface 66 and an adjacent surface 63 b formed perpendicular to the opposing surface 63 a, and the wiper motor 21 is attached to the motor bracket 32. In the fixed state, the distal end portion of the peripheral wall portion 62 is opposed to the opposing surface 63a with a predetermined interval, and the outer peripheral surface of the peripheral wall portion 62 is adjacent to the adjacent surface 63b. Thereby, the front-end | tip part of the surrounding wall part 62 will be enclosed by the opposing surface 63a and the adjacent surface 63b of the surrounding part 63, and it prevents that rainwater etc. apply | coat to the ventilation hole 61 directly by this, Waterproofness can be improved.

  As described above, in the wiper device 13, the vent hole 61 provided in the gear case 25 of the speed reducer 23 is opened downward, and the front end portion of the peripheral wall portion 62 where the vent hole 61 opens is formed in the motor bracket 32. Since it is surrounded by the portion 63, rainwater or the like scattered toward the vent hole 61 can be blocked by the surrounding portion 63, and rainwater or the like can be prevented from entering the gear case 25 from the vent hole 61.

  In the wiper device 13, as shown in FIGS. 5, 6, and 8, the motor bracket 32 is provided with a waterproof wall portion 71 that surrounds the outer peripheral surface of the peripheral wall portion 62. The rainwater or the like scattered toward the peripheral wall portion 62 is blocked to improve the waterproofness of the vent hole 61.

  This waterproof wall portion 71 is formed integrally with the motor bracket 32 so as to protrude upward from the motor fixing portion 33, that is, toward the gear case 25, and from the edge portion of the through hole 35, the mounting surface 64, the surrounding portion 63, the inclined portion It is formed so as to reach the frame fixing portion 34 through the surface 65 and the lowermost surface 66. That is, the waterproof wall 71 is erected so as to cover the gap between the motor bracket 32 and the bottom surface of the gear case 25 in order to prevent rainwater or the like from entering the bottom surface side of the gear case 25 where the vent hole 61 opens. As a result, the outer peripheral surface of the peripheral wall 62 is surrounded by the waterproof wall 71.

  Further, the waterproof wall portion 71 is disposed so as to face the peripheral wall portion 62 with a predetermined distance from the outer peripheral surface thereof, whereby the peripheral wall portion 62 and the waterproof wall portion 71 are complicated. A shape is formed. That is, the waterproof wall portion 71 and the peripheral wall portion 62 are parallel to each other and protrude from opposite directions to each other, and therefore, the waterproof wall portion 71 and the peripheral wall portion 62 form a labyrinth so that rainwater or the like hardly enters. It has a shape. Therefore, even if rainwater or the like scatters toward the vent hole 61, the scattered rainwater or the like is blocked by the waterproof wall 71, and even if this waterproof wall 71 is exceeded, it is blocked by the outer peripheral surface of the peripheral wall 62, Rainwater or the like is not directly applied to the vent hole 61.

  As described above, in the wiper device 13, the waterproof wall portion 71 surrounding the outer peripheral surface of the peripheral wall portion 62 is provided on the motor bracket 32, so that rainwater or the like scattered toward the vent hole 61 is blocked by the waterproof wall portion 71. Thus, the waterproof property of the vent hole 61 can be further enhanced.

  In the wiper device 13, the waterproof wall portion 71 is arranged to face the peripheral wall portion 62 with a predetermined space therebetween, so that the rainwater is formed by the complicated shape of the peripheral wall portion 62 and the waterproof wall portion 71. Etc. can be cut off to further enhance the waterproofness of the vent hole 61.

  As shown in FIGS. 5, 6, and 8, in the wiper device 13, a pair of drain holes 72 and 73 are provided in the motor bracket 32, and rainwater or the like scattered on the motor bracket 32 is discharged from these drain holes 72 and 73. It is discharged outside so that rainwater or the like does not accumulate on the motor bracket 32.

  As shown in FIG. 8, these drain holes 72 and 73 are formed on the lowermost surface 66 of the motor bracket 32 adjacent to the frame fixing portion 34, and one drain hole 72 is inside the waterproof wall 71, that is, The other drainage hole 73 is disposed on the same side as the surrounding wall 63 with respect to the waterproof wall 71, and the other drainage hole 73 is disposed on the outer side of the waterproof wall 71, that is, on the opposite side to the surrounding wall 63. Further, the drain holes 72 and 73 are formed on the lowermost surface 66 in a state of being attached to the vehicle body 11 a, so that the drain holes 72 and 73 are positioned below the front end portion of the peripheral wall portion 62.

  As a result, when rainwater or the like scattered toward the motor bracket 32 enters the inside of the waterproof wall 71 and hits the attachment surface 64, the surrounding portion 63, the inclined surface 65, or the like, the rainwater or the like is inclined to the inclined surface 65. Then, it flows to the lowermost surface 66 and is discharged from the drain hole 72 to the outside. On the other hand, when rainwater or the like scattered toward the motor bracket 32 is blocked by the waterproof wall portion 71 and falls outside the waterproof wall portion 71 of the motor bracket 32, the rainwater or the like reaches the lowermost surface 66 via the inclined surface 65. And is discharged from the drain hole 73 to the outside. Thus, even if rainwater or the like scatters on the motor bracket 32, the rainwater or the like is discharged to the outside from the drain holes 72 and 73, so that it is possible to prevent rainwater or the like from accumulating on the motor bracket 32. Therefore, it is possible to prevent rainwater or the like accumulated in the motor bracket 32 from jumping into the gear case 25 through the vent hole 61.

  As described above, in the wiper device 13, drainage holes 72 and 73 are provided in the motor bracket 32 so that rainwater and the like accumulated in the motor bracket 32 are discharged from the drainage holes 72 and 73 to the outside. It is possible to further improve the waterproofness of the vent hole 61 by preventing rainwater or the like accumulated in the 32 from entering the vent hole 61 by jumping or the like. In particular, by providing the drain holes 72 and 73 below the front end portion of the peripheral wall portion 62, rainwater and the like accumulated in the motor bracket 32 can be discharged more effectively.

  It goes without saying that the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the scope of the invention. For example, in the present embodiment, the present invention is applied to the tandem wiper device 13, but the present invention is not limited to this, and the present invention is applied to a wiper device having another wiping pattern such as a counter wiping type. Also good.

  Further, in the present embodiment, the DR side pivot holder portion 42 is formed integrally with the motor bracket 32 and the AS side pivot holder 44 is formed separately, and the motor bracket 32 and the AS side pivot holder 44 are separated from each other. The DR side pivot holder part 42 is formed separately from the motor bracket 32, and the DR side pivot holder part 42 and the AS side pivot holder 44 are not limited thereto. And the motor bracket 32 may be connected to an intermediate portion of the frame 41.

  Further, in the present embodiment, the surrounding portion 63 is formed in a shape in which the inclined surface 65 formed in the motor bracket 32 is cut out. However, the present invention is not limited to this, and for example, the distal end portion of the peripheral wall portion 62 The surrounding portion 63 may be configured by an opposing surface that faces the cylindrical surface and a cylindrical wall that protrudes from the opposing surface and covers the outer peripheral surface of the peripheral wall portion 62.

It is explanatory drawing which shows the outline of the wiper apparatus for vehicles which is one embodiment of this invention. It is a perspective view which shows the detail of the wiper apparatus shown in FIG. FIG. 3 is a side view of the wiper motor shown in FIG. 2. It is a top view which shows the internal structure of the reduction gear shown in FIG. It is a perspective view which shows the detail of the motor bracket shown in FIG. It is a top view of the motor bracket shown in FIG. It is the bottom view which looked at the gear case shown in FIG. 3 from the lower side. It is sectional drawing which shows the relationship between the air hole formed in the gear case, and a motor bracket.

Explanation of symbols

11 Vehicle 11a Car body 12 Windshield (windshield glass)
12a, 12b Wiping range 13 Vehicle wiper device 14a DR side wiper shaft 14b AS side wiper shaft 15a DR side wiper arm 15b AS side wiper arm 16a DR side wiper blade 16b AS side wiper blade 21 Wiper motor 22 Motor body 22a Rotation shaft 23 Reduction gear 24 Output shaft 25 Gear case 26 Reduction mechanism 27a, 27b Worm 28a, 28b Worm wheel 29a, 29b Pinion 31 Output gear 32 Motor bracket 33 Motor fixing portion 34 Frame fixing portion 35 Through hole 36 Mounting hole 37 Mounting foot 38 Bolt 41 Frame 42 DR side pivot holder part 43 Cylindrical part 44 AS side pivot holder 45 Cylindrical part 46a, 46b Mounting leg part 47a, 47b Mounting leg part 48 Bush 51 Output arm 52 N G 53 Driving rod 54a DR side driving lever 54b AS side driving lever 55 Connecting rod 61 Ventilation hole 62 Peripheral wall part 63 Surrounding part 63a Opposing surface 63b Adjacent surface 64 Mounting surface 65 Inclined surface 66 Bottom surface 71 Waterproof wall portion 72, 73 Drain hole

Claims (5)

A wiper shaft to which a wiper arm is attached; a wiper motor that swings and drives the wiper shaft; a pivot holder that rotatably supports the wiper shaft; a motor bracket to which a wiper motor is fixed on a lower surface side of the wiper motor; and the pivot holder And a frame for connecting the motor bracket, and a vehicle wiper device for wiping a windshield glass of a vehicle,
A reducer that is provided in the wiper motor and decelerates and outputs the rotation of the motor body;
A peripheral wall portion that is formed to project downward from the gear case of the speed reducer and that has a vent hole that communicates the inside and outside of the gear case at a tip portion;
A vehicle wiper device, comprising: an enclosure portion formed on the motor bracket and surrounding a distal end portion of the peripheral wall portion.   2. The vehicle wiper device according to claim 1, wherein a waterproof wall portion surrounding the outer peripheral surface of the peripheral wall portion is provided on the motor bracket.   3. The vehicle wiper device according to claim 2, wherein the waterproof wall portion is disposed to face the outer peripheral surface of the peripheral wall portion with a predetermined interval.   The vehicle wiper device according to any one of claims 1 to 3, wherein a drainage hole is provided in the motor bracket.   5. The vehicle wiper device according to claim 4, wherein the drainage hole is provided below a front end portion of the peripheral wall portion.

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