JP2006315511A - Wiper device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent water from covering a wiper motor of a wiper device with a simple constitution. <P>SOLUTION: This wiper device 1 has a frame member 2 mounted to a vehicle body side, and a wiper motor 6 is fixed to the frame member 2 via a motor bracket 7. Rotation of the wiper motor 6 is transmitted to a parallel link 12 via a connecting rod 11, and swings a first link arm 13 and a second link arm 15 as components of the parallel link 12 so as to rotate two pivot shafts 20 and 23. Furthermore, a water-proof member 30 is fixed to the frame member 2 in a manner that the pivot shafts 20 and 23 penetrate, and prevents water from covering the wiper motor 6. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a wiper device used to wipe a glass surface of a vehicle.

  A wiper device used in a vehicle has a pivot shaft that is rotated by the rotation of a wiper motor. A base end portion of the wiper arm is attached to the pivot shaft, and a wiper blade mounted on the distal end portion of the wiper arm is swung to make glass. It is comprised so that a surface may be wiped off.

Here, the wiper device for wiping the windshield glass on the front side of the vehicle has two wiper arms for wiping the driver side region and the passenger side region, respectively, and these wiper arms are linked to each other. There is something to be linked by. Such a wiper device is fixed in a space formed between the cowl top garnish on the vehicle body side and the cowl panel. The cowl top garnish is formed with an outside air inlet and has a recess, and an attachment hole through which the pivot shaft is inserted is formed (for example, see Patent Document 1). Further, a water drain hole is formed in the concave portion to prevent water from accumulating in the concave portion, and water flowing from the water drain hole is guided to a drain guide formed at the bottom of the cowl panel.
JP-A-8-2444

As described above, the wiper device on the front side of the vehicle is mounted at a position where water enters the cowl panel from the cowl top garnish, so that rainwater, washer liquid, other liquids (hereinafter referred to as rainwater) ) The wiper device was easy to get wet. For this reason, in the conventional wiper device, rust prevention measures have to be taken carefully with respect to each component, particularly a through hole that rotatably supports the wiper motor and the pivot shaft.
The present invention has been made in view of such circumstances, and a main object thereof is to prevent the wiper motor and the like of the wiper apparatus from being wet with a simple configuration.

The invention according to claim 1 of the present invention for solving the above-described problems is a wiper motor, a frame member to which the wiper motor is attached, a pivot shaft rotatably attached to the frame member, and rotation of the wiper motor. A link mechanism for swinging the pivot shaft; and a moisture prevention member for preventing the wiper motor from getting wet. The moisture prevention member is attached to the frame member by passing through the plurality of pivot shafts. The wiper device is characterized by that.
In this wiper device, a water-proof member is placed between the opening of the cowl top garnish, the frame member, and the wiper motor, and rainwater that has been dripped directly onto the frame member or wiper motor in the past is prevented from being wet. It is discharged without passing through the member and getting wet the wiper motor or the like.

According to a second aspect of the present invention, there is provided a wiper motor, a frame member to which the wiper motor is attached, a first pivot shaft that is inserted and supported in a first through hole provided in the frame member, and a first member provided in the frame member. A link pivotally connected to each of the second pivot shaft inserted through and supported by the two through holes, the first pivot shaft, and the second pivot shaft to convert the rotational motion of the wiper motor into a swing motion. A wiper device comprising a mechanism and a water-preventing member attached to the frame member and covering at least the wiper motor.
In this wiper device, a moisture-preventing member is disposed between an opening such as a cowl top garnish and the first and second through holes of the frame member and the wiper motor. Rainwater or the like dripped directly onto the wiper motor travels through the water-preventing member, and is discharged without causing the wiper motor or the like to get wet. For this reason, rainwater or the like does not enter the connecting portion of the wiper motor or the first and second through holes. In particular, when it is necessary to dispose the first pivot shaft and the second pivot shaft close to the curvature of the glass surface of the vehicle and the area of the glass surface, By disposing the prevention member, it is possible to prevent the wiper motor from being wetted by rainwater or the like dripping from an opening such as a ur top garnish.

According to a third aspect of the present invention, in the wiper device according to the first aspect, the water-preventing member includes a sheet member through which the first pivot shaft and the second pivot shaft pass. It was.
In this wiper device, the pivot shaft is passed through the sheet-like water-proof member, thereby covering the support portion of the pivot shaft on the frame member side and the wiper motor, thereby forming a watertight structure.

According to a fourth aspect of the present invention, in the wiper device according to any one of the first to third aspects, the waterproof member is attached to the frame member by a waterproof cap attached to the pivot shaft. A wiper device characterized by
In this wiper device, by attaching a waterproof cap to the pivot shaft, rainwater or the like transmitted through the pivot shaft is prevented from entering the support portion of the pivot shaft on the frame member side. Further, by using this waterproof cap as a fixing means for the water-preventing member, the water-preventing member is prevented from being displaced and the watertight structure around the pivot shaft is further ensured.

  According to the present invention, a water-proof member such as a wiper motor for preventing water is provided, and the water-proof member is attached to the frame member so as to penetrate the pivot shaft, thereby forming a watertight structure with a simple configuration. In particular, it is possible to prevent water on the support portion of the pivot shaft on the frame member side and on the wiper motor. For this reason, in the area | region covered with the moisture prevention member, the rust resulting from the flooding by rainwater etc. can be prevented.

The best mode for carrying out the invention will be described in detail with reference to the drawings.
As shown in FIGS. 1 and 2, the wiper device 1 includes a frame member 2 having a curved elongated shape. Brackets 3, 4 are integrally formed at both ends of the frame member 2, and a plurality of mounting seats 5 used for mounting the frame member 2 on the vehicle body side project from the brackets 3, 4. The frame member 2, the brackets 3 and 4, and the mounting seat 5 are integrally formed by die casting. Further, a wiper motor 6 is fixed to one bracket 4 via a motor bracket 7.

  The wiper motor 6 has a stator and a rotor accommodated in a case 6a, and the case 6a is fixed to the motor bracket 7 with screws. As shown in FIG. 3, a drive shaft 8 extends from the motor bracket 7 in the direction of the axis S1. The direction of the axis S1 is a direction orthogonal to the axis of the rotor of the wiper motor 6. A reduction mechanism (not shown) is built in the motor bracket 7 so as to convert the rotation of the rotor into the rotation of the drive shaft 8. One end of a crank arm 9 is fixed to the drive shaft 8. For this reason, the other end portion of the crank arm 9 rotates as shown by the locus C1. One end of a connecting rod 11 is rotatably connected to the other end of the crank arm 9 by a pin 10. The connecting rod 11 has an elongated shape and extends so as to intersect the frame member 2. As shown in FIGS. 1 and 2, the other end of the connecting rod 11 is rotatably connected to the other end of the first link arm 13 of the parallel link 12 via a pin 14.

The parallel link 12 includes a first link arm 13 on the bracket 3 side of the frame member 2, a second link arm 15 on the bracket 4 side, and a link rod 16 that connects ends of the link arms 13 and 15. .
The first link arm 13 has an elongated shape, and a first pivot shaft 20 that passes through the frame member 2 is fixed to one end of the first link arm 13. The first pivot shaft 20 extends in the direction of the axis S <b> 2 perpendicular to the longitudinal direction of the first link arm 13. By inserting and supporting such a first pivot shaft 20 through a through-hole formed in the frame member 2, the first link arm 13 swings in an arc shape as indicated by a locus C2 in FIG. be able to. A link rod 16 is rotatably connected to the other end of the first link arm 13 by a pin 21. The pin 21 is fixed to a surface opposite to the surface of the first link arm 13 to which the pin 14 connected to the connecting rod 11 is fixed.

The link rod 16 has an elongated shape, one end of which is connected to the other end of the first link arm 13, and the other end is rotatable to the other end of the second link arm 15 via a pin 22. It is connected to.
The second link arm 15 has an elongated shape, and a second pivot shaft 23 that passes through the frame member 2 is fixed to one end of the second link arm 15. The second pivot shaft 23 extends in the direction of the axis S3 perpendicular to the longitudinal direction of the second link arm 15. Since the second pivot shaft 23 is inserted into and supported by the through hole formed in the frame member 2, the second link arm 15 can swing in an arc shape as indicated by a locus C3. .

  The pivot shafts 20 and 23 are set so that their axis lines S2 and S3 are substantially parallel to each other, and are inserted into the frame member 2 so that their tips are in the same direction. A male screw for attaching a wiper arm is formed at the tip of each pivot shaft 20, 23 protruding from the frame member 2. Furthermore, pivot caps 31 and 32 that are waterproof caps are attached to the pivot shafts 20 and 23. The directions of the axes S2 and S3 of the pivot shafts 20 and 23 are set according to the size and curvature of the windshield glass.

  As shown in FIGS. 1, 2, and 4, the water-preventing member 30 has two through holes 33 and 34. These through holes 33 and 34 have such a size that a step portion formed in the frame member 2 can be inserted, and form a watertight structure with the frame member 2. Furthermore, the distance between the through holes 33 and 34 is equal to the arrangement interval of the pivot shafts 20 and 23. The water-preventing member 30 is wide on the through hole 33 side and narrow on the through hole 34 side. As shown in FIG. 1, the shape of the water-preventing member 30 can cover the motor bracket 7 and the wiper motor 6 around the pivot shafts 20 and 23 of the frame member 2 and between the pivot shafts 20 and 23. Shape. Further, the water-preventing member 30 is warped so that the center protrudes, and the warping direction is a direction away from the frame member 2. Such a water-preventing member 30 is a sheet-like member manufactured from a water-resistant resin such as polyester, for example.

  As shown in FIG. 5, the pivot cap 31 has a hole 31 </ b> A through which the first pivot shaft 20 can be inserted at the center, and the base end portion 31 </ b> B is enlarged in diameter so that the frame member 2 can be received. In the base end portion 31B, a receiving portion 35 is annularly extended in a direction orthogonal to the axis S2. The receiving portion 35 has its peripheral portion 35A raised in the direction of the axis S2, and is an annular recess that can collect rainwater and the like. The inner diameter of the base end portion 31 </ b> B is substantially equal to the outer diameter of the through hole 34 of the water-preventing member 30. Further, the outer diameter of the receiving portion 35 is sufficiently larger than the outer diameter of the through hole 34. The pivot cap 31 is mounted after the first pivot shaft 20 is penetrated and supported in the first through hole 41 of the frame member 2 and the water-proof member 30 is further penetrated, and is attached to the step portion of the frame member 2. It fixes so that the to-be-water-proof member 30 may be inserted | pinched between.

  Similarly, the pivot cap 32 has a hole 32 </ b> A through which the second pivot shaft 23 can be inserted, and the base end portion 32 </ b> B is enlarged in diameter so that the frame member 2 can be received. The receiving portion 36 formed at the base end portion 32B can collect rainwater and the like by raising the peripheral portion 36A. The inner diameter of the base end portion 32 </ b> B is substantially equal to the outer diameter of the through hole 33 of the water-preventing member 30, and the outer diameter of the receiving portion 36 is sufficiently larger than the outer diameter of the through hole 33. The pivot cap 32 is mounted after the second pivot shaft 23 is penetrated and supported in the second through hole 42 of the frame member 2 and the water-proof member 30 is further penetrated. It fixes so that the to-be-water-proof member 30 may be inserted | pinched between.

  The pivot caps 31 and 32 are manufactured as rubber molded products. For this reason, a watertight structure is formed between the inner periphery of the pivot cap 31 and the first pivot shaft 20 and between the pivot cap 31 and the water blocking member 30 by being in close contact with each other. Similarly, a watertight structure is formed between the inner periphery of the pivot cap 32 and the second pivot shaft 23 and between the pivot cap 32 and the water-preventing member 30 by closely contacting each other.

Furthermore, an arrangement example of the wiper device 1 will be described with reference to FIGS. 6 and 7.
FIG. 6 is a schematic cross-sectional view of the front portion of the vehicle body. Between the lower end of the windshield glass 51 on the front surface of the vehicle and the rear end of the bonnet 52, a resin cowl top garnish 53 extends in the vehicle width direction. It is extended in a band shape. The cowl top garnish 53 is formed with a plurality of slits 54 for introducing outside air into the air conditioner or for inserting the pivot shafts 20 and 23 of the wiper device 1. The front end portion of the cowl top garnish 53 is fixed to the cowl panel 56 via a seal member 55. The cowl panel 56 has a concave shape extending in the vehicle width direction from a position where the cowl top garnish 53 is fixed to a lower end portion of the windshield glass 51. It is fixed.

  The wiper device 1 is fixed so as to be housed in a recess 58 formed by the cowl top garnish 53 and the cowl panel 56. At this time, as shown in FIG. 7, the pivot shafts 20 and 23 protrude from holes 59 and 59 formed at positions corresponding to the pivot shafts 20 and 23 of the cowl top garnish 53, and the wiper arm is formed outside the cowl top garnish 53. 60 and 61 are screwed with a nut (not shown). The water protection member 30 is disposed between the cowl top garnish 53 and the frame member 2, and the size thereof is larger than that of the slit 54 and the hole 59. In particular, the water-preventing member 30 is disposed so that it protrudes larger than the end of the slit 54 on the front end side of the vehicle body, and the front end side is inclined downward.

The operation of this embodiment will be described.
First, when the windshield glass 51 is wiped by the wiper device 1, the wiper motor 6 is energized from a power source (battery) (not shown) mounted on the vehicle. The rotation of the rotor of the wiper motor 6 is transmitted to the drive shaft 8 via a speed reduction mechanism in the motor bracket 7, and the crank arm 9 fixed to the drive shaft 8 is rotated around the axis S1 of the drive shaft 8 as indicated by a locus C1. Rotate. Here, one end of a connecting rod 11 is rotatably connected to the crank arm 9 by a pin 10, and a first link arm 13 is rotatable by a pin 14 to the other end of the connecting rod 11. Therefore, the first link arm 13 is driven in accordance with the rotational movement of the crank arm 9. The first link arm 13 is rotatably supported on the frame member 2 by a pivot shaft 20. Therefore, the rotational motion of the crank arm 9 is converted into the swing motion of the first link arm 13 around the pivot shaft 20.

  Further, since the first link arm 13 is rotatably connected to the second link arm 15 via the link rod 16, the swinging motion of the first link arm 13 is transmitted to the second link arm 15. . The second link arm 15 starts a swinging motion as indicated by a locus C3 about the pivot shaft 23. As a result, both link arms 13 and 15 swing in synchronization, and the pivot shafts 20 and 23 of the link arms 13 and 15 rotate about the axes S2 and S3, respectively. Accordingly, the wiper arm 60 fixed to the pivot shaft 20 swings around the pivot shaft 20, and a wiper blade (not shown) attached to the tip of the wiper arm 60 wipes the area on the driver seat side of the windshield glass 51. Similarly, a wiper arm 61 fixed to the pivot shaft 23 swings around the pivot shaft 23, and a wiper blade (not shown) attached to the tip of the wiper arm 61 wipes the area on the passenger seat side of the windshield glass 51. .

  Here, rainwater or the like is guided into the cowl panel 56 from the hole 59 of the cowl top garnish 53 as shown in FIG. At that time, when rainwater mainly drops on the pivot caps 31 and 32 and overflows from the receiving portions 35 and 36 of the pivot caps 31 and 32, the rainwater is transmitted along the upper surface of the water-preventing member 30 to prevent water exposure. It drops from the tip of the member 30 onto the cowl panel 56. Since the water-preventing member 30 is larger than the portion between the pivot shafts 20 and 23 of the frame member 2 and the wiper motor 6, rainwater and the like are around the pivot shafts 20 and 23 of the frame member 2 and the pivot shafts 20 and 23. Without reaching the portion 23, the wiper motor 6 and the motor bracket 7, the bottom surface of the cowl panel 56 is reached and discharged from a drain hole (not shown). Further, as shown in FIG. 5, when the pivot shafts 20 and 23 are not inserted, rainwater or the like dripped from the slit 54 directly travels on the upper surface of the water-preventing member 30, and It drops from the front end portion to the cowl panel 56.

  According to this embodiment, since the water-preventing member 30 and the pivot caps 31 and 32 that form the seal structure that covers the frame member 2 and the wiper motor 6 are supported by the two pivot shafts 20 and 23, rainwater or the like is cowled. When entering the cowl panel 56 from the slit 54 or the hole 59 of the top garnish 53, rainwater or the like can be discharged through the water-preventing member 30. Furthermore, it is possible to prevent the frame member 2 from being wetted by rainwater or the like transmitted through the pivot shafts 20 and 23 by the pivot caps 31 and 32. Accordingly, rainwater or the like is not directly applied to the portions covered with the moisture prevention member 30 such as the periphery of the wiper motor 6, the motor bracket 7 and the pivot shafts 20 and 23, so that these components are prevented from being wetted. . For this reason, the rust etc. of the wiper apparatus 1 by flooding, such as rain water, can be prevented. Here, since the water-preventing member 30 is warped so that the central portion protrudes from the outer edge portion, rainwater or the like can be quickly dropped from the outer peripheral portion onto the cowl panel 56.

Note that the present invention is not limited to the above embodiment and can be widely applied.
For example, in order to fix the water-preventing member, it is possible to eliminate the need for a pivot cap that covers the pivot shaft by forming a plurality of fixing means such as claws on the frame member and fixing the water-preventing member. Moreover, you may use what fixed the pivot shaft attaching part which hold | maintains a pivot shaft rotatably at the both ends of a pipe-shaped frame member, respectively. Furthermore, when using a wiper device that wipes the glass surface with a single wiper arm, a through hole that penetrates the pivot shaft is provided in the water-proof member, and at least one locking claw provided in the frame member The waterproof member may be fixed by a fixing means. Similarly, when each of the plurality of pivot shafts is separated from each other, a moisture prevention member may be fixed to each pivot shaft.

It is a figure which shows schematic structure of the wiper apparatus which concerns on embodiment of this invention. It is A arrow directional view of FIG. FIG. 3 is a view taken in the direction of arrow B in FIG. 2. It is a top view of a moisture prevention member. It is sectional drawing of a pivot cap. It is a figure which shows arrangement | positioning and an effect | action of a wiper apparatus. It is a figure which shows arrangement | positioning and an effect | action of a wiper apparatus.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Wiper apparatus 2 Frame member 6 Wiper motor 9 Crank arm (link mechanism)
11 Connecting rod (link mechanism)
12 Parallel link (link mechanism)
20 First Pivot Shaft 23 Second Pivot Shaft 30 Water Covering Member 31, 32 Pivot Cap (Waterproof Cap)
41 1st through-hole 42 2nd through-hole

Claims (4)

A wiper motor,
A frame member to which the wiper motor is attached;
A pivot shaft rotatably attached to the frame member;
A link mechanism for swinging the pivot shaft by rotation of the wiper motor;
A wet prevention member for preventing the wiper motor from being wet;
The wiper device according to claim 1, wherein the moisture prevention member is attached to the frame member by passing through the plurality of pivot shafts. A wiper motor,
A frame member to which the wiper motor is attached;
A first pivot shaft that is inserted and supported by a first through hole provided in the frame member;
A second pivot shaft inserted and supported in a second through hole provided in the frame member;
A link mechanism that is rotatably connected to each of the first pivot shaft and the second pivot shaft, and that converts the rotational motion of the wiper motor into a swing motion;
A water-preventing member attached to the frame member and covering at least the wiper motor;
A wiper device characterized by comprising: The wiper device according to claim 1,
The wiper apparatus according to claim 1, wherein the water-preventing member comprises a sheet member through which the first pivot shaft and the second pivot shaft pass. In the wiper device according to any one of claims 1 to 3,
The wiper device according to claim 1, wherein the waterproof member is attached to the frame member by a waterproof cap attached to the pivot shaft.

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