JP4848728B2 - Waterproof structure of wiper motor - Google Patents

Description

  The present invention relates to a waterproof structure for a wiper motor.

  A windshield glass such as a front part of a car compartment of an automobile is provided with a wiper device equipped with a rubber wiper blade to remove rainwater, dust and the like. This wiper device is driven by a wiper motor, and in many cases, this motor is installed on the front surface of the cowl top that forms the skeletal member at the front of the vehicle body and on the upper surface inside the windshield glass. Has been. An example of such a wiper driving device is disclosed in Patent Document 1 below.

JP-A-11-321568

  However, in the wiper device disclosed in Patent Document 1, the wiper motor is installed at a position where rainwater or the like easily enters, such as the front surface or the inner upper surface of the cowl top. When the wiper motor gets wet, there is a possibility that the wiper motor will break down. In particular, in a cold region, the wiper motor, the drive mechanism, etc. may be damaged due to freezing of water, and the wiper device may not be used.

  Further, when the wiper motor is arranged on the front surface of the cowl top, it is difficult to lay out other parts on the front surface of the cowl top, and there is a problem that it is difficult to adopt a cabin forward vehicle body layout that has been widely adopted in recent years.

  Accordingly, an object of the present invention is to provide a waterproof structure for a wiper motor that prevents the wiper motor from getting wet.

A waterproof structure for a wiper motor according to a first aspect of the present invention (corresponding to claim 1) that solves the above-described problem is a cowl top that extends in the vehicle width direction below the lower end of the windshield glass, and a bottom surface of the cowl An air intake duct that is attached to the front surface of the cowl top so as to protrude downward from the lower surface of the top and introduces outside air for air conditioning inside, and a portion that protrudes downward from the lower surface of the cowl top of the air intake duct And a wiper motor disposed below the cowl top and an insulator provided to prevent water from entering the gap between the cowl top and the air intake duct.

  A waterproof structure for a wiper motor according to a second invention (corresponding to claim 2) that solves the above-described problem is the waterproof structure for a wiper motor according to the first invention, and is positioned in front of the wiper motor below the cowl top. And the wiper motor cover which covers the front surface and the lower surface side of the wiper motor is provided.

  A waterproof structure for a wiper motor according to a third invention (corresponding to claim 3) that solves the above-mentioned problem is the waterproof structure for a wiper motor according to the second invention, wherein the waterproof structure for the wiper motor covers the gap between the cowl top and the wiper motor cover A second insulator is provided so as to prevent water from entering.

According to the waterproof structure of the wiper motor according to the first aspect of the invention, the cowl top that extends in the vehicle width direction below the lower end portion of the windshield glass, and the cowl top so that the bottom surface projects downward from the lower surface of the cowl top. An air intake duct that is attached to the front surface of the air intake and introduces outside air for air conditioning inside, a wiper motor that is disposed below the cowl top behind the lower portion of the cowl top of the air intake duct, and the cowl By providing an insulator provided to prevent water from entering the gap between the top and the air intake duct, the wiper motor is less likely to be exposed to rainwater, and flows through the gap between the cowl top and the air intake duct. Since the water can be sealed, the wiper motor can be prevented from getting wet.

  According to the waterproof structure of the wiper motor according to the second invention, in the waterproof structure of the wiper motor according to the first invention, the wiper motor is positioned in front of the wiper motor below the cowl top so as to cover the front surface and the lower surface side of the wiper motor. By providing the wiper motor cover, it is possible to prevent not only the water that flows along the cowl top from the upper side of the vehicle but also the water splashed during driving from being splashed from below the wiper motor, so that the wiper motor is flooded Can be prevented.

  According to the waterproof structure of the wiper motor according to the third invention, in the waterproof structure of the wiper motor according to the second invention, the second insulator provided so as to prevent water from entering the gap between the cowl top and the wiper motor cover. Since the water flowing through the gap between the cowl top and the air intake duct can be sealed, the wiper motor can be further waterproofed.

  An embodiment of a waterproof structure for a wiper motor according to the present invention will be described with reference to FIGS. 1 is a perspective view of an air intake duct according to the present invention, FIG. 2 is a perspective view of a wiper motor cover according to the present invention, FIG. 3 is a cross-sectional view taken along the line AA in FIG. 1, and FIG. It is a top view of the wiper drive device concerning. In the drawings, the vehicle front direction is Fr, the vehicle width direction vehicle interior direction is In, the vehicle upper direction is Up, and the left and right directions are the left and right directions when facing the front of the vehicle.

  As shown in FIGS. 1 and 2, there is a windshield glass 10 in the front part of the passenger compartment of the automobile. A cowl top 11, which is a skeleton member at the front of the vehicle body, extends in the vehicle width direction below the lower end of the windshield glass 10.

  As shown in FIG. 1, an air intake duct 1 for introducing outside air into the vehicle is installed at the center of the front surface of the cowl top 11 in the vehicle width direction. As shown in FIG. 3, the cross section of the air intake duct 1 in the vehicle front-rear direction is substantially U-shaped. The air intake duct 1 is disposed such that its bottom surface 6 protrudes downward from the lower surface of the cowl top 11 and is coupled to the front surface of the cowl top 11 by bolting or the like.

  The air intake duct 1 has a wall upper end on the rear side of the vehicle that closes the gap between the front surface of the cowl top 11 and the upper end of the air intake duct 1 so as to prevent water from flowing in through the cowl top 11. A duct insulator 2 is installed. In this embodiment, a rubber member having elasticity is used as the material of the air intake duct insulator 2.

  The air intake duct 1 has a structure in which the bottom surface 6 is inclined in order to drain rainwater or the like that has entered the air intake duct 1, and there is a flow in a portion that is lowered due to the inclination of the bottom surface 6 of the air intake duct 1. A drain port 3 (see FIG. 1) is provided to drain the rainwater that has flown.

  As shown in FIG. 1, a deck garnish 12 is installed on the upper portion of the air intake duct 1 to prevent invasion of dust and decoration. The deck garnish 12 is provided with an air inlet 13 so as to extend in the vehicle width direction in order to introduce air into the air intake duct 1. In this embodiment, rainwater wiped off by the wiper blade 23 flows into the air intake duct 1 from the intake port 13 of the deck garnish 12 and is drained from the drainage port 3.

  As shown in FIGS. 2 and 4, a wiper motor unit 14 for driving the wiper device is installed at the center of the lower surface of the cowl top 11. The wiper motor unit 14 includes a wiper motor 26 and a driving mechanism 27 that transmits a driving force of the wiper motor 26 to the link 20. The wiper motor unit 14 is supported by being coupled to a wiper motor side bracket 15 (see FIG. 3) attached to the lower surface of the cowl top 11 by bolting or the like.

  A wiper motor cover 4 is installed on the vehicle front side of the wiper motor unit 14. The wiper motor cover 4 has a shape that covers the front surface and the lower surface of the wiper motor unit 14. As shown in FIG. 3, the upper end portion of the wiper motor cover 4 closes the gap between the lower surface of the cowl top 11 and the upper end portion of the wiper motor cover 4 to prevent water from entering the wiper motor cover insulator (second insulator). 5 is installed. In this embodiment, a rubber member having elasticity is used as the material of the wiper motor cover insulator 5. Further, in FIG. 2, portions that are actually hidden by the wiper motor cover 4 and are not visible are indicated by broken lines.

  As shown in FIGS. 1, 2, and 4, a pivot-side bracket 24 serving as a wiper support is installed on the right end side of the front surface of the cowl top 11. The pivot-side bracket 24 is provided with a rotatable columnar rotation shaft 16. The rotating shaft 16 penetrates to the lower surface of the pivot-side bracket 24, and a connecting portion 17 for transmitting rotational force to the rotating shaft 16 is provided at the lower end portion of the rotating shaft 16.

  A stay 18 for supporting the pivot side bracket 24 is installed on the lower surface of the pivot side bracket 24. The upper end portion of the stay 18 is coupled to the front surface of the cowl top 11 by bolting, and the lower end portion of the stay 18 is coupled to the front surface of the strut house 25 in which the strut is accommodated by bolting.

  The stay 18 and the pivot side bracket 24 are coupled by tightening a bolt 19. The connecting portion 17 of the pivot bracket 24 and the wiper motor unit 14 are connected by a rod-like link 20 for transmitting the driving force of the wiper motor 26.

  Further, a rod-like connecting shaft 22 is provided between the rear right side of the wiper motor unit 14 and the rear left side of the pivot side bracket 24 to connect the wiper motor unit 14 and the pivot side bracket 24.

  A wiper arm 21 for supporting and driving the wiper blade 23 is installed at the upper end of the pivot shaft 16 of the pivot side bracket 24, and is located on the opposite side of the end of the wiper arm 21 that supports the wiper blade 23. The end portion 21 a is rotatably coupled to the upper end portion of the rotation shaft 16.

  According to the waterproof structure of the wiper motor according to the present embodiment, the wiper motor unit 14 is disposed below the cowl top 11, and the bottom surface of the air intake duct 1 is disposed so as to protrude downward from the lower surface of the cowl top 11. The wiper motor unit 14 is unlikely to be exposed to rainwater or the like. Since the upper side of the so-called wiper motor unit 14 is covered with the cowl top 11 and the air intake duct 1, it is advantageous for waterproofing the wiper motor 26.

  Further, since an insulator 2 for preventing water from entering the gap between the cowl top 11 and the air intake duct 1 is provided to seal the water flowing through the gap between the cowl top 11 and the air intake duct 1, the wiper motor 26 can be effectively prevented from getting wet.

  Further, by providing the wiper motor unit 14 on the lower surface of the cowl top 11, the space in front of the cowl top 11 can be used effectively. An advantageous structure can be provided in the so-called cabin forward vehicle body layout.

  Further, by providing the wiper motor cover 4 covering the front and lower surfaces of the wiper motor unit 14 in front of the wiper motor unit 14 below the cowl top 11, not only water flowing from above through the cowl top but also splashing during traveling. Since the raised water can be prevented from splashing from below the wiper motor unit 14, the wiper motor 26 can be prevented from getting wet.

  Further, by providing a wiper motor cover insulator 5 that closes the gap between the cowl top 11 and the wiper motor cover 4 and prevents water from entering, the water flowing through the gap between the cowl top 11 and the wiper motor cover 4 is sealed. Therefore, the waterproofing of the wiper motor 26 is further ensured.

  The waterproof structure for a wiper motor according to the present invention is particularly effective in preventing the wiper motor of an automobile in which a separate intake duct is installed on the front surface of the cowl top from being wetted.

The perspective view of the air intake duct which concerns on this invention The perspective view of the wiper motor cover concerning the present invention 1 is a cross-sectional view taken along the line AA in FIG. A perspective plan view of a wiper drive device according to the present invention

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Air intake duct 2 Air intake duct insulator 3 Drain outlet 4 Wiper motor cover 5 Wiper motor cover insulator (2nd insulator)
6 Air intake duct bottom surface 10 Windshield glass 11 Cowl top 12 Deck garnish 13 Air inlet 14 Wiper motor unit 15 Wiper motor side bracket 16 Rotating shaft 17 Connecting portion 18 Stay 19 Bolt 20 Link 21 Wiper arm 22 Connecting shaft 23 Wiper 24 Pivot side bracket 25 Strut house 26 Wiper motor 27 Drive mechanism

Claims (3)

A cowl top extending in the vehicle width direction below the lower end of the windshield glass;
An air intake duct that is attached to the front surface of the cowl top so that the bottom surface projects downward from the lower surface of the cowl top, and introduces outside air for air conditioning inside;
A wiper motor disposed below the cowl top behind a portion of the air intake duct that projects downward from the lower surface of the cowl top;
A waterproof structure for a wiper motor, comprising: an insulator provided to prevent water from entering a gap between the cowl top and the air intake duct. The wiper motor waterproof structure according to claim 1, further comprising a wiper motor cover that is positioned in front of the wiper motor below the cowl top and covers a front surface and a lower surface side of the wiper motor. The waterproof structure for a wiper motor according to claim 2, further comprising a second insulator provided to prevent water from entering a gap between the cowl top and the wiper motor cover.

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