JP2014184839A - Wiper device fitting structure of automobile - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a wiper device fitting structure of an automobile capable of relieving an impact load, by making a wiper motor fall off, by removing a vehicle fitting part of a motor of a wiper device from a vehicle body constitution member, when inputting the impact load from above.SOLUTION: A bending part (b) for bending a cowl front wall part 10b to the vehicle front when inputting the impact load, is formed in the cowl front wall part positioned on a longitudinal directional straight line B of passing through a rear fixing point (a) and a fixing point (c) of a motor fitting surface 11a of a support pin 5g, a bracket fitting surface 10e is formed so as to continue with the bending part (b), a fitting bracket 11 is fitted to the bracket fitting surface 10e so that a lower end part thereof is positioned in the bending part (b), and the fitting bracket 11 is formed with a notch part 11e for forming a support hole 11d on the motor fitting surface 11a and opening the support hole 11d downward.

Description

  The present invention relates to an automobile wiper device mounting structure, and more particularly to a structure that can alleviate an impact force when an impacted object falls on a cowl louver during a vehicle collision.

  When a certain collision object falls on the cowl louver due to a vehicle collision, there is a problem that the wiper device disposed below the cowl louver is stretched and hinders the reduction of the impact load. As a structure for avoiding this problem, there is a conventional structure disclosed in, for example, Patent Document 1. In this conventional structure, a substantially horizontal shelf is formed on the front vertical wall bent downward from the front end of the cowl upper panel extending in the vehicle width direction, and the pivot shaft of the wiper device is fixed to the shelf. A V-shaped groove is formed below the shelf so as to extend in the vehicle width direction.

JP 2004-249997 A

  In the conventional structure, when a collision object falls on the cowl louver at the time of a vehicle collision, the V-shaped groove portion buckles and absorbs an impact load. However, the V-shaped groove portion tends to bend even during normal wiper operation, and the wiper device can only be displaced by the buckling of the V-shaped groove with respect to the action of an impact load, so that the amount of displacement is not sufficient. There is.

The present invention has been made in view of the above-described conventional situation, and when the impact load from above is input, the impact load is mitigated by removing the vehicle mounting portion of the motor of the wiper device from the vehicle body structural member and dropping the wiper motor. It is an object of the present invention to provide a wiper device mounting structure for an automobile that can be made.

The present invention relates to a plurality of pivot holders that pivotally support a pivot shaft having a wiper arm fixed to a tip portion thereof, a frame that connects the pivot holders to each other, a motor fixed to the frame, and the motor A wiper device having a link mechanism for transmitting the driving force of the motor to the pivot shaft is disposed below the cowl louver.
A portion in the vicinity of the pivot shaft of the pivot holder is fixed to the rear wall of the cowl, and a support pin protruding forward from the motor is inserted and fixed into a support hole of a motor mounting surface of a mounting bracket attached to the front wall of the cowl. In the wiper device mounting structure,
When seen in the direction of the rear fixed straight line connecting the fixed points of the pivot holder to the rear wall of the cowl of the pivot holder, the fixed point to the rear wall of the cowl and the support pin to the motor mounting surface Forming a bent portion that bends the front wall portion of the cowl forward of the vehicle when an impact load is input, on a portion that is positioned on a straight line in the front-rear direction that passes through the fixed point;
On the front wall portion of the cowl, a mounting surface of the mounting bracket is formed so as to be continuous with the bent portion,
Attaching the mounting bracket to the mounting surface;
When the motor mounting surface is viewed in the rear fixed straight direction on the mounting bracket, it is formed to be orthogonal to the front-rear direction straight line,
The support hole is formed on the motor mounting surface, and a notch for opening the support hole downward is formed.

  According to the present invention, when an impact load is applied to the cowl louver from above due to some collision object such as a pedestrian falling on the cowl louver during a frontal collision of the vehicle, the front wall of the cowl is pushed against the cowl louver. The bent portion is deformed so as to fall forward with the rotation portion as a rotation center, and the mounting bracket rotates upwardly around the bending portion in conjunction with the deformation, so that the support hole of the motor mounting surface is The cutout portion moves upward relative to the support pin, and the support pin is detached from the support hole.

On the other hand, the motor is pushed downward directly over the cowl louver by the impact load and tries to rotate downward in the vehicle with the rear fixed straight line as the center of rotation. Therefore, the support pin is notched in the support hole. Go down through.

Thus, the support hole portion of the mounting bracket has a tangent line of the rotating arc that rotates about the bent portion, and the rotating arc of the rotating pin that rotates the support pin of the motor about the rear fixed straight line. Since the mounting bracket and the motor are rotated so that the tangent line is collinear with the tangent line, the support pin is quickly and easily removed from the support hole of the mounting bracket when the impact force is input, and the motor is rotated downward. It can be moved and dropped, the impact load can be relieved reliably, and the pedestrian protection performance can be improved.

The above-mentioned effects can be realized simply by devising the fixing point of the wiper device to the rear wall of the cowl, the angle of the motor mounting surface of the mounting bracket, the fixing point of the motor support pin, and the position of the bent portion of the front wall of the cowl. In addition, it is not necessary to separately adopt a complicated buckling structure, there is no trouble in normal wiper operation, and there is no problem of cost, weight increase and productivity deterioration.

It is a perspective view of the wiper apparatus mounting structure by Example 1 of this invention. It is a side view (II arrow line view of FIG. 1) of the said attachment structure. It is a disassembled perspective view which shows the fixing procedure of the attachment bracket of the said attachment structure, a rubber bush, and a motor. It is the front view and side view of the said mounting bracket. It is a top view for demonstrating the positional relationship of each fixing point of the said attachment structure.

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

  1 to 5 are views for explaining a structure for mounting a wiper device for an automobile according to a first embodiment of the present invention. In this embodiment, front, rear, left, and right refer to the front of the vehicle from the vehicle interior. This means front, back, left, and right as viewed.

In the figure, reference numeral 1 denotes a wiper device in an automobile. In the wiper device 1, a pair of left and right pivot holders 3 and 3 that pivotally support a pivot shaft 2 are connected by a frame 4, a motor 5 is fixed to the frame 4, and an output of the motor 5 is linked to a link mechanism 6. It is comprised so that it may transmit to the said pivot shafts 2 and 2 via.

The pivot holder 3 is made of a thick plate having a substantially triangular shape, and is arranged and fixed so that the cylindrical portion 3a penetrates vertically near the bottom of the pivot holder 3, and the pivot shaft 2 is rotated in the cylindrical portion 3a. It is inserted to be movable. A mounting hole 3b is formed in a portion near the apex angle of the pivot holder 3 so as to penetrate vertically.

The frame 4 has a rod-like shape, and both end portions 4a and 4a are fixed to the pivot holders 3 and 3 by welding, and a motor mounting seat 4b is formed at the center thereof.

The motor 5 includes a motor body 5a and a speed reduction mechanism 5b coupled thereto, and mounting pieces 5c and 5c provided on the speed reduction mechanism 5b are fastened and fixed to the motor mounting seat 4b by bolts 5d.

The link mechanism 6 includes link rods 6a and 6a connected to a swing arm 5f fixed to the output shaft 5e of the speed reduction mechanism 5b, and a drive arm 6b connected to each link rod 6a. The drive arm 6b is fixed to the lower end of the pivot shaft 2.

A support pin 5g is formed on the front wall portion of the speed reduction mechanism 5b so as to protrude forward, and a rubber bush 12 is fitted and attached to the support pin 5g. The rubber bush 12 is formed by forming an annular slit groove 12b in a cylindrical body having a fitting hole 12a into which the support pin 5g is fitted.

As shown in FIG. 2, the wiper device 1 is disposed below a resin cowl louver 8 that extends in the vehicle width direction on the front side of the lower end portion 7 a of the windshield 7. The front edge 8a of the cowl louver 8 is positioned below the rear end of the hood 9 that opens and closes the engine room, and is supported by the front edge 10a of the cowl inner 10. The cowl inner 10 is made of sheet metal, has a concave cross section having a front wall portion 10b, a bottom wall portion 10c, and a rear wall portion 10d, and extends in the vehicle width direction.

A shelf 10d ′ for attaching the rear portion of the wiper device 1 is formed on the rear wall portion 10d of the cowl inner 10. The pivot holder 3 is placed on the shelf portion 10d ', a bolt 13a is inserted into the mounting hole 3b, and the rear portion of the wiper device 1 is tightened to a nut 13a' fixed to the back surface of the shelf portion 10d '. Is fixed. The pivot shaft 2 protrudes upward in the vicinity of the windshield 7 of the cowl louver 8, and a wiper arm (not shown) is fixed to the protruding end.

A bracket mounting surface 10e is formed at a midway in the height direction of the front wall portion 10b of the cowl inner 10 by bending the front wall portion 10b forward from the bent portion b. The mounting bracket 11 is mounted on the bracket mounting surface 10e, and the support pin 5g is supported by the rubber bush 12 interposed in a support hole 11d of the mounting bracket 11.

The mounting bracket 11 has a motor mounting surface 11a, and left and right leg portions 11b and 11b bent forward from the left and right edge portions of the motor mounting surface 11a. Flange portions 11c, 11c are formed by bending outward from the front end edge in the vehicle width direction.

The motor mounting surface 11a of the mounting bracket 11 is formed so as to be orthogonal to a front-rear direction straight line B which will be described later. The motor mounting surface 11a is formed with the support hole 11d into which the annular slit groove 12b of the rubber bush 12 is fitted, and a notch 11e is formed to open the support hole 11d downward. Has been. In the assembling operation of the rubber bush 12, the slit groove 12b is pushed upward through the notch 11e and press-fitted into the support hole 11d.

  Here, the bent portion b of the front wall portion 10b of the cowl inner 10 is disposed at the following position. That is, as shown in FIGS. 2 and 5, the bent portion b is orthogonal to a rear fixing straight line A connecting the rear fixing points a and a to the shelf 10 d ′ of the pivot holders 3 and 3, and The support pin 5g is positioned on the front-rear direction straight line B passing through the front fixing point c to the mounting bracket 11. The bracket mounting surface 10e of the front wall portion 10b is formed to be orthogonal to the front-rear direction straight line B. The mounting bracket 11 is aligned so that the lower end 11b 'of the leg portion 11b and thus the lower end of the flange portion 11c coincides with the bent portion b, and the flange portion 11c has a plurality of spots on the bracket mounting surface 10e. It is fixed by spot welding at the hit point w.

According to the present embodiment, when an impact load F acts on the cowl louver 8 from above due to some collision object such as a pedestrian falling on the cowl louver 8 at the time of a frontal collision of the vehicle, the front wall of the cowl inner 10 The portion 10b is deformed so that the front edge portion 10a of the cowl louver 8 is pushed by the front edge portion 8a of the cowl louver 8 so as to fall forward with the bent portion b as a rotation center. In conjunction with this deformation, the mounting bracket 11 rotates upward so that the front fixing point c between the motor mounting surface 11a and the support pin 5g draws an arc of radius R1 with the bent portion b as the center. Therefore, the notch portion 11e of the support hole 11d moves upward relative to the support pin 5g and thus the slit groove 12b of the rubber bush 12, and the rubber bush 12 together with the support pin 5g is supported by the support hole 11d. Deviate from.

On the other hand, the motor 5 is pushed down directly over the cowl louver 8 by the impact load F, and the front fixing point “b” draws an arc having a radius R2 with the rear fixing straight line A as the center of rotation. Therefore, the support pin 5g moves downward together with the rubber bush 12 through the notch 11e of the support hole 11d.

In this way, the support hole 11d portion of the mounting bracket 11 is connected to the tangent line C1 of the rotation arc R1 ′ rotating at the radius R1 centered on the bent portion b, and the support pin 5g of the motor 5 is fixed to the rear portion. Since the mounting bracket 11 and the motor 5 rotate so that the tangent line C2 of the rotation arc R2 ′ rotating at the radius R2 centered on the straight line A forms the same straight line, the support pin 5g together with the rubber bush 12 When the impact force F is input from the support hole 11d of the mounting bracket 11, it can be quickly and easily detached, the motor 5 can be pivoted and dropped downward, and the impact load F can be reliably reduced. Pedestrian protection performance can be improved.

The effect of the wiper device 1 on the rear fixing point a to the shelf 10d 'of the rear wall 10d, the angle of the motor mounting surface 11a of the mounting bracket 11, and the motor mounting surface 11a of the support pin 5g of the motor 5 are as follows. Since it can be realized simply by devising the front fixing point c, the position of the bent portion b of the front wall portion 10b of the cowl inner 10 and the mounting position of the mounting bracket 11, it is not necessary to separately employ a complicated buckling structure, Further, normal wiper operation is not hindered, and cost, weight increase, and productivity deterioration are not caused.

In the above embodiment, the case where the bracket mounting surface 10e is orthogonal to the front-rear direction straight line B has been described. However, the bracket mounting surface 10e does not necessarily need to be orthogonal to the front-rear direction straight line B. It may be bent forward.

Moreover, in the said Example, when the motor attachment surface 11a of the attachment bracket 11 is orthogonal to the front-rear direction straight line B orthogonal to the said rear fixed straight line A, that is, in a side view shown in FIG. 2 and a plan view shown in FIG. In both cases, the case where the motor mounting surface 11a is orthogonal to the front-rear direction straight line B has been described. However, the motor mounting surface 11a of the present invention is orthogonal to the front-rear direction straight line B when viewed in the rear fixed straight line A direction. It should be. For example, the motor mounting surface 11a may be slightly inclined in the vehicle front-rear direction as shown by a two-dot chain line in FIG.

 Moreover, in the said Example, although the lower end part 11b 'of the attachment bracket 11 was made to correspond to the said bending part b, even if the lower end part of this attachment bracket was made to overhang below the said bending part b, it is. Alternatively, it may be positioned upward.

DESCRIPTION OF SYMBOLS 1 Wiper apparatus 2 Pivot shaft 3 Pivot holder 4 Frame 5 Motor 5g Support pin 6 Link mechanism 8 Cowl louver 10b Cowl front wall part 10d Cowl rear wall part 10e Bracket mounting surface 11 Mounting bracket 11a Motor mounting surface 11d Support hole 11e Notch a Rear fixing point A Rear fixing straight line b Bending part B Front-rear direction straight line c Fixing point of support pin to mounting bracket

Claims (1)

A plurality of pivot holders that pivotally support a pivot shaft to which a wiper arm is fixed at the tip, a frame that connects the pivot holders to each other, a motor that is fixed to the frame, and a driving force of the motor A wiper device having a link mechanism for transmitting to the pivot shaft is disposed below the cowl louver;
A portion in the vicinity of the pivot shaft of the pivot holder is fixed to the rear wall of the cowl, and a support pin protruding forward from the motor is inserted and fixed into a support hole of a motor mounting surface of a mounting bracket attached to the front wall of the cowl. In the wiper device mounting structure,
When seen in the direction of the rear fixed straight line connecting the fixed points of the pivot holder to the rear wall of the cowl of the pivot holder, the fixed point to the rear wall of the cowl and the support pin to the motor mounting surface Forming a bent portion that bends the front wall portion of the cowl forward of the vehicle when an impact load is input, on a portion that is positioned on a straight line in the front-rear direction that passes through the fixed point;
On the front wall portion of the cowl, a mounting surface of the mounting bracket is formed so as to be continuous with the bent portion,
Attaching the mounting bracket to the mounting surface;
When the motor mounting surface is viewed in the rear fixed straight direction on the mounting bracket, it is formed to be orthogonal to the front-rear direction straight line,
1. A wiper device mounting structure for an automobile, wherein the support hole is formed on the motor mounting surface and a notch for opening the support hole downward is formed.

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