JP2006335198A - Four-wheel atv (all-terrain vehicle) - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve the rigidity of a front cowling front part and installation rigidity of a headlight, and improve the cooling efficiency of a radiator. <P>SOLUTION: A right and a left headlight housings 72 are connected and fixed by a bridge part 73 to compose a headlight unit 71. The headlight unit 71 is fixed to a front end part lower surface of a front cowling 37. Between the right and the left headlight housings 72, an air duct grill 64 is disposed, and the radiator 21 is provided on the back of it to be fixed to a car body frame 2. Car width direction inner walls of the right and the left headlight housings 72 are extended at least rearward to form a right and a left inner extended walls 85 facing each other. A lower wall of the bridge part 73 is extended rearward to form a bridge part lower extended wall 86. The inner extended walls 85 and the bridge part lower extended wall 86 are extended toward the radiator 21 to form a travel air guide passage 87. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a four-wheel ATV vehicle equipped with a headlamp device.

  As shown in Patent Document 1, in a straddle-type four-wheel ATV vehicle (All Terrain Vehicle) that can travel on rough terrain, the front end of a resin-made front cowling that covers the front and front wheels of the vehicle body is provided on both left and right sides. A pair of left and right headlamp devices are provided. The headlamp device is accommodated in a headlamp housing which is an outer shell thereof, and the headlamp housing is fixed to vehicle body components such as a front cowling and a vehicle body frame.

On the other hand, the radiator that cools the engine coolant is often installed just in front of the engine to avoid damage due to collision with obstacles during driving and to concentrate the center of gravity of the vehicle body. Is located behind the wind guide grill formed in front of the front cowling.
Japanese Patent No. 3466988

  The ATV vehicle has the following problems to be solved.

  First, since the relatively heavy headlamps are fixed at the front left and right ends of the front cowling, which is made of resin and has low rigidity, the front left and right front cowlings depend on the headlamp weight when running on rough terrain. Both ends may swing up and down, generating vibration noise and causing damage, etc. In addition, the headlamp's mounting rigidity is insufficient, which shortens the life of the headlamp bulb due to vibration and shifts the optical axis. It was a problem.

  On the other hand, because the radiator is located behind the wind guide grill formed on the front cowling front, the traveling wind from the front taken in from the wind guide grille during traveling spreads before reaching the radiator, and the radiator There was a problem of low cooling efficiency.

  The present invention has been made to solve the above-described problems, and can improve the rigidity of the front cowling front and the headlamp, and can improve the cooling efficiency of the radiator. An object of the present invention is to provide a four-wheel ATV vehicle capable of reducing the number of wheels and improving the assembly workability.

  In order to achieve the above object, a four-wheel ATV vehicle according to the present invention comprises a headlamp unit configured by connecting and fixing a pair of left and right headlamp housings with a bridge portion extending in the vehicle width direction. The headlamp unit is fixed to the lower surface of the front end portion of the front cowling that covers the front wheel.

  Further, in the headlamp peripheral structure of the four-wheel ATV vehicle according to the present invention, a wind guide grille for introducing running wind from the front is disposed between the pair of left and right head lamp housings, and behind the wind guide grille. A radiator is provided and fixed to the vehicle body frame, while the inner walls in the vehicle width direction of the left and right headlamp housings are extended at least rearward to form inner extension walls facing each other in the left-right direction. The bridge portion is connected and fixed, the lower wall of the bridge portion is extended rearward to form a lower extension wall of the bridge portion, and the inner extension wall and the lower extension wall of the bridge portion are extended to the vicinity of the radiator. A running wind introduction path was formed to guide the running wind taken from the wind guide grille to the radiator.

  Furthermore, in the headlamp peripheral structure of the four-wheel ATV vehicle according to the present invention, the bridge portion of the headlamp unit is arranged close to the front end edge shape of the front cowling.

  In the four-wheel ATV vehicle headlamp peripheral structure according to the present invention, in the vehicle side view, the inner extension wall has a lower end that becomes lower toward the radiator side, and a lower end at the bottom end is a height of the radiator. It formed so that it might become a position lower than the center of a horizontal direction dimension.

  Further, in the headlamp peripheral structure of the four-wheel ATV vehicle according to the present invention, the cross-sectional shape of the bridge portion is a substantially J shape opened rearward, and is lower than the upper wall of the bridge portion. The wall was extended long toward the rear, and an opening was formed in the front surface of the bridge portion.

  According to the four-wheel ATV vehicle of the present invention, the headlamp unit composed of a pair of left and right headlamp housings and a bridge portion connecting between the headlamp housings is fixed to the lower surface of the front end of the front cowling. The bending rigidity in the vertical direction and the mounting rigidity of the headlamps at both the left and right ends can be improved, and the headlamps that have been separated into the left and right in the past are combined into one unit to reduce the number of parts and improve the assembly workability. be able to.

  Further, since the traveling wind introduced from the wind guide grille hits the radiator without diffusing by the traveling wind introduction path provided in the headlamp housing, the cooling efficiency of the radiator can be improved.

  In addition, the bridge part of the headlamp unit is arranged close to the front edge of the front cowling, so that the flow of running wind taken from the wind guide grille is not blocked by the bridge part and applied to the radiator. The cooling efficiency can be improved, and at the same time, the rigidity of the front cowling front edge portion can be greatly improved by the bridge portion.

  Since the inner extension wall is formed so that the lower end of the inner extension wall becomes lower toward the radiator side and the lower end of the lower end is located at a position lower than the center of the height dimension of the radiator in a side view of the vehicle. It is possible to improve the cooling efficiency of the radiator by reliably applying the traveling wind to the upper half of the radiator.

  Moreover, the cross-sectional shape of the bridge portion is a substantially J-shape opened rearward, and the lower wall is extended longer rearward than the upper wall of the bridge portion, and an opening is formed on the front surface of the bridge portion. Therefore, the rigidity of the bridge portion itself can be improved, and more running air can be taken from the opening portion to improve the cooling efficiency of the radiator.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a left side view of a four-wheel ATV vehicle to which the present invention is applied.

  The four-wheel ATV vehicle 1 includes a body frame 2 made of steel pipe, for example. The vehicle body frame 2 vertically extends between the pair of left and right front upper pipes 3 and 4 and the pair of left and right rear upper pipes 5 and 6 and the front upper pipe 3 and the front lower pipe 4 at the front. A pair of left and right vertical pipes 7 connected in the direction, a pair of left and right horizontal pipes 8 connecting the vertical pipe 7 and the front upper pipe 3 in the front-rear direction, and a pair of left and right frame members. A plurality of bridge members (not shown) connected in the vehicle width direction and the like are provided to form a substantially cage shape.

  An engine unit 11 is mounted inside the vehicle body frame 2, a fuel tank 12 is disposed on the vehicle body frame 2 above the engine unit 11, and a straddle-type driving seat 13 is placed behind the fuel tank 12. Yes. The engine unit 11 is, for example, a four-cycle water-cooled single-cylinder engine body 15 and a transmission unit 16 integrated with each other. The engine body 15 is provided with a cylinder 17 inclined forward, and a fuel is disposed at the rear of the cylinder 17. A supply device 18 is connected, an exhaust pipe 19 extending from the front portion of the cylinder 17 extends rearward, and an exhaust muffler 20 is connected to the rearmost portion. A radiator 21 for exchanging heat of the engine coolant is fixed to the foremost part of the vehicle body frame 2 (the front surface of the front upper pipe 3).

  A front wheel 24 with a pair of left and right wide low-pressure tires is disposed in front of the engine unit 11, and each front wheel 24 is supported by a front wheel suspension device such as a front shock absorber 25 so as to be swingable in the vertical direction and elastically. The front wheel 24 is steered left and right via a steering shaft 27 by a steering handle 26 disposed in front of the fuel tank 12.

  On the other hand, a rear wheel 31 with a pair of left and right wide low-pressure tires is disposed behind the engine unit 11. These rear wheels 31 are pivotally supported on the rear end of a swing arm 33 pivotably mounted in a vertical direction by a pivot shaft 32 disposed inside the body frame 2 behind the engine unit 11, and a rear shock absorber 34 and the like. The rear wheel suspension is swingably and elastically supported in the vertical direction.

  The vehicle body front head including the front portion of the vehicle body frame 2 and the front wheel 24 are covered with a resin front cowling 37, and the vehicle body rear portion including the rear portion of the vehicle body frame 2 is also covered with a resin rear cowling 38. Yes. The front cowling 37 and the rear cowling 38 are continuously configured via a pair of left and right low step portions 39, and the driver sits on the driving seat 13 and holds the steering handle 26, and holds both feet on the left and right step portions. The four-wheel ATV vehicle 1 is operated on the 39.

  An auxiliary lamp 41 is provided in front of the steering handle 26, and the periphery of the auxiliary lamp 41 is covered with a small lamp cowling 42. Further, the fuel tank 12 is covered with a tank cover 43. Both the lamp cowling 42 and the tank cover 43 are made of resin.

  As shown in FIG. 2, which is a perspective view of the front cowling 37 as viewed obliquely from the left, and FIG. 3, which is an exploded perspective view around the front cowling 37, the resin-made front cowling 37 is located at the center in the vehicle width direction. A front fender 46 is integrally formed on the left and right sides of the bonnet hood 45. A rear fender 47 is integrally formed on the left and right sides of the rear cowling 38.

  A front frame 50 is provided at the front portion of the front cowling 37. The front frame 50 is a steel pipe strength member, and includes a front bumper 51 extending in the vehicle width direction, a pair of left and right vertical stays 52, a lower beam 53 extending in the vehicle width direction, and a pair of left and right extending from the vertical stay 52. The fixing bracket 54 and the fastening pieces 55 at the left and right ends of the lower beam 53 are detachably fastened and fixed to the front portion (front upper pipe 3) of the vehicle body frame 2.

  Also, a steel pipe front carrier 57 and a rear carrier 58 for loading luggage are respectively installed on the upper part of the front cowling 37 (bonnet hood 45) and the upper part of the rear cowling 38. The front carrier 57 has four support stays 59 fixed to the vehicle body side and a pair of left and right support brackets 60 as will be described later.

  A front cover 63, which is also a resin molded product, is attached to the front portion of the front cowling 37. The front cover 63 is formed by integrally molding a wind guide grill 64 and a bumper cover 65 that are continuous with the front end of the hood hood 45 of the front cowling 37.

  The upper part of the wind guide grill 64 is fixed to mounting bosses (not shown) provided on the pair of left and right vertical stays 52 of the front frame 50, and the lower part of the wind guide grill 64 is provided with two fastening brackets 67, provided on the front frame 50. The bumper cover 65 covers the front bumper 51 from the front.

  A support stay 59 on the rear side of the front carrier 57 passes through the front cowling 37 (bonnet hood 45) and is detachably fastened to the front upper pipe 3. The support stay 59 on the front side is connected to the front cowling 37 and the front cover 63. A pair of left and right fastening brackets 66 formed on the front bumper 51 of the front frame 50 are detachably fastened. Further, the left and right support brackets 60 of the front carrier 57 are fastened and fixed to fastening seats 61 formed on the upper surface of the front fender 46. The rear carrier 58 is also fixed to the vehicle body frame 2 with a similar structure.

  A headlamp unit 71 is provided at the front end of the front cowling 37. As shown in FIGS. 3, 4, and 5, the headlamp unit 71 includes a pair of left and right headlamp housings 72, and a bridge portion 73 that extends in the vehicle width direction and connects and fixes the left and right headlamp housings 72. It has.

  The headlamp housing 72 and the bridge portion 73 are individually formed of a resin material and are connected and fixed to each other by a connecting portion 74. However, the headlamp housing 72 and the bridge portion 73 may be integrally molded. Further, the headlamp housing 72 and the bridge portion 73 may be formed of a material (metal or the like) having a rigidity higher than that of the resin. The cross-sectional shape of the bridge portion 73 is a substantially J-shape opened rearward, and for example, three openings 75 are formed on the front surface of the bridge portion 73.

  The headlamp unit 71 is fixed to the lower surface of the front end portion of the front cowling 37. For example, a pair of left and right fastening bosses 76 provided in the vicinity of the connecting portion 74 between the headlamp housing 72 and the bridge portion 73 are connected to a pair of left and right fastening seats 77 provided near the front end of the bonnet hood 45 as shown in FIG. Fastened with a fastening member such as a screw. A fastening piece 78 provided near the upper end of the headlamp housing 72 in the vehicle width direction is fastened and fixed to the fastening seat 61 of the front fender 46 together with the support bracket 60 of the front carrier 57.

  The bridge portion 73 of the headlamp unit 71 is disposed in close proximity along the front end edge shape of the front cowling 37. That is, as shown in FIG. 5, the bridge portion 73 is disposed at a height substantially continuous with the upper sides of the left and right headlamp housings 72, and opens downward between the left and right headlamp housings 72 and the bridge portion 73. A U-shaped air guide space 80 is formed.

  For example, three fastening seats 81, 82 and 83 are formed on the lower side of each headlamp housing 72, and these fastening seats 81 to 83 are fastened and fixed to the bumper cover 65 of the front cover 63.

  The wind guide grill 64 of the front cover 63 is disposed in front of the left and right headlamp housings 72, that is, in front of the wind guide space 80 described above. The radiator 21 is located behind the wind guide grill 64, and the running wind from the front during running is introduced from the wind guide grill 64 to cool the radiator 21.

  As shown in FIGS. 3 to 5, 6, and 7, the inner walls in the vehicle width direction of the left and right headlamp housings 72 are extended rearward and downward to form a pair of inner extending walls 85 that face each other in the left-right direction. ing. A bridge portion 73 is connected and fixed to the upper portions of these inner extension walls 85 via a connecting portion 74.

  As shown in FIG. 6, the lower wall of the bridge portion 73 is longer than the upper wall of the bridge portion 73 so as to extend rearward to form a bridge portion lower extension wall 86. A traveling wind introduction path 87 extending to the vicinity of the radiator 21 is formed by the lower extension wall 86.

  In other words, the traveling wind introduction path 87 forms the bridge portion lower extension wall 86 of the bridge portion 73 that forms the upper portion of the U-shaped wind guide space 80 that opens downward, and both sides of the wind guide space 80. A pair of left and right inner extension walls 85 are included.

  The inner extension wall 85 has a position in which the lower end of the inner extension wall 85 becomes lower as it goes toward the radiator 21 in a side view of the vehicle (see FIG. 6), and the lower end of the lower end is lower than the center C of the height dimension of the radiator 21. It is formed to become.

  In the four-wheel ATV vehicle 1 configured as described above, the traveling wind blown from the front during traveling is taken from the wind guide grill 64 and guided to the radiator 21 through the traveling wind introduction path 87 (wind guiding space 80).

  According to the present invention, the headlamp unit 71 is configured by connecting and fixing the pair of left and right headlamp housings 72 with the bridge portion 73 extending in the vehicle width direction, and the headlamp unit 71 is connected to the lower surface of the front end portion of the front cowling 37. As a result, the bending rigidity in the vertical direction and the mounting rigidity of the headlamp unit 71 at the front left and right ends of the front cowling 37 can be greatly improved.

  In addition, since the headlamp which has conventionally been divided into the left and right is made into one headlamp unit 71, the number of parts can be reduced and the assembly workability can be improved.

  Further, since the traveling wind introduction path 87 is configured by the inner extension wall 85 provided in the headlamp housing 72 and the bridge portion lower extension wall 86 provided in the bridge portion 73, the traveling wind introduced from the wind guide grill 64 can be reduced. It can be applied to the radiator 21 without being diffused, and the cooling efficiency of the radiator 21 can be improved.

  The inner extension wall 85 is formed such that the lower end of the inner extension wall 85 becomes lower as it goes toward the radiator 21, and the lower end of the inner extension wall 85 is lower than the center C of the height dimension of the radiator 21. In addition, the flow of the relatively upper traveling wind, which is not influenced by the lower air flow that is violently diffused by the rotation of the front wheel 24, the operation of the front wheel suspension device, or the like, is ensured in the upper half of the radiator 21 that is particularly heated. The radiator 21 can be efficiently cooled by the contact.

  Since the bridge portion 73 of the headlamp unit 71 is disposed close to the front edge of the front cowling 37, the bridge portion 73 does not obstruct the flow of the traveling wind passing through the traveling wind introduction path 87. The bridge portion 73 can greatly improve the rigidity of the front edge portion of the front cowling 37.

  Since the cross-sectional shape of the bridge portion 73 is a substantially J-shape opened rearward, the rigidity of the bridge portion 73 itself can be dramatically improved. In addition, since a plurality of openings 75 are formed on the front surface of the bridge portion 73, more traveling wind is taken from these openings 75 to improve the cooling efficiency of the radiator 21 and at the same time, turbulent flow behind the bridge portion 73. Can be prevented and generation of wind noise can be suppressed.

  And since the wall (bridge part lower side extension wall 86) below the upper wall of this bridge part 73 was extended long rearward, the traveling wind which passes the lower side (traveling wind introduction path 87) of the bridge part 73 is extended. And the running wind passing through the opening 75 can be smoothly rectified, and the ventilation effect can be improved.

  The structure around the headlight according to the present invention is not limited to a four-wheel ATV vehicle, but can be widely applied to a vehicle including a pair of left and right headlamps and a front fender (bonnet hood) such as a general four-wheel vehicle. can do.

The left view of the four-wheel ATV vehicle to which this invention was applied. The perspective view which looked at the front cowling from diagonally left forward. The exploded perspective view around a front cowling. The perspective view of a headlamp unit. The front view of a headlamp unit. The left view of a headlamp unit and a radiator. The front view of a headlamp unit and a radiator.

Explanation of symbols

1 Four-wheel ATV vehicle 2 Body frame 11 Engine unit 21 Radiator 24 Front wheel 31 Rear wheel 37 Front cowling 46 Front fender 50 Front frame 51 Front bumper 63 Front cover 64 Wind guide grill 65 Bumper cover 71 Headlamp unit 72 Headlamp housing 73 Bridge part 75 Opening 85 Inner extension wall 86 Bridge lower extension wall 87 Traveling wind introduction path C Center of radiator height dimension

Claims (5)

A headlamp unit is configured by connecting and fixing a pair of left and right headlamp housings with a bridge portion extending in the vehicle width direction, and the headlamp unit is fixed to the lower surface of the front end of the front cowling that covers the front of the vehicle body and the front wheel. A four-wheel ATV vehicle characterized by this. Between the pair of left and right headlamp housings, a wind guide grille for introducing running wind from the front is disposed, and a radiator is provided at the rear of the wind guide grille and fixed to the vehicle body frame. The inner wall in the vehicle width direction is extended at least rearward to form inner extension walls facing each other, the bridge portion is connected and fixed to the upper part of these inner extension walls, and the lower wall of the bridge portion is rearward Extending the bridge portion lower extension wall to extend the inner extension wall and the bridge lower extension wall to the vicinity of the radiator, and a running wind introduction path for guiding the running wind taken from the wind guide grill to the radiator. The four-wheel ATV vehicle according to claim 1 formed. 4. The four-wheel ATV vehicle according to claim 1, wherein a bridge portion of the headlamp unit is disposed in close proximity along a front end edge shape of the front cowling. 3. The vehicle according to claim 2, wherein the inner extension wall is formed such that the lower end of the inner extension wall becomes lower toward the radiator side, and the lower end of the inner extension wall is lower than the center of the height dimension of the radiator. The four-wheel ATV vehicle described in 1. The cross-sectional shape of the bridge portion is a substantially J-shape opened rearward, and the lower wall is extended longer rearward than the upper wall of the bridge portion, and an opening is formed on the front surface of the bridge portion. The four-wheel ATV vehicle according to claim 1 or 2 formed.

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