JP2023019330A - Front part structure for cab - Google Patents

Abstract

To provide a front part structure for a cab that increases the rigidity of a front cover so as to prevent the front cover made of resin from being minutely vibrated due to the vibration of a vehicle ant that prevents generation of wind noise caused by a clearance between the front cover and a front panel.SOLUTION: A front part structure for a cab includes: a front panel 4 provided on a front surface of a cab 2 of a vehicle; a front cover 20 provided on an upper part of the front panel 4 with a clearance left with respect to the front panel 4; a reinforcement rib 23 provided on a rear surface of the front cover 20 and extended in a vehicle width direction; and a sealing member 15 fixed to the reinforcement rib 23 and filling the clearance.SELECTED DRAWING: Figure 3

Description

The present invention relates to a vehicle cab front structure.

Vehicles such as non-bonnet trucks have a wiper device on the front of the cab, and a resin front cover is used to protect the motor that drives the wiper device from the effects of the wind and to improve the appearance of the front of the cab. may be provided.

Patent Literature 1 discloses a wiper cover (front cover) provided in front of a wiper mechanism of a vehicle to reduce wind noise and running resistance. Patent Literature 2 discloses an on-vehicle component mounting structure capable of mounting a wiper motor unit at a desired angle with respect to a vehicle body panel without lowering the supporting strength.

JP 2013-049337 A Japanese Patent Application Laid-Open No. 2008-105629

By the way, a front panel made of sheet metal, which is a separate part from the front cover, is provided below the resin front cover provided on the front surface of the cab. A gap is provided between the front cover and the front panel to prevent the front cover made of resin from vibrating slightly due to vibrations during running, thereby preventing the two parts from interfering with each other. In order to improve the appearance of the front surface of the cab, the smaller the gap, the better.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and its object is to increase the rigidity of a front cover made of resin so that it does not vibrate slightly due to vibrations of a vehicle, and to prevent the front cover and the front panel from vibrating. To provide a front structure of a cab that prevents generation of wind noise caused by a gap between a

The present invention has been made to solve at least part of the above problems, and can be implemented as the following aspects or application examples.

The front structure of the cab according to this application example includes a front panel provided on the front surface of the cab of the vehicle, a front cover provided above the front panel with a gap from the front panel, and a rear surface of the front cover. and a reinforcing rib extending in the vehicle width direction, and a sealing member fixed to the reinforcing rib and filling the gap.

The front structure of the cab configured in this way has reinforcing ribs extending in the vehicle width direction on the rear side of the front cover (on the rear side of the vehicle) to improve the rigidity of the front cover and reduce vibrations caused by the vehicle. To prevent a front cover from slightly vibrating. Further, since the sealing member is provided so as to fill the gap between the front panel and the front cover by utilizing the reinforcing rib, it is possible to prevent wind noise caused by the gap between the front cover and the front panel.

1 is a left front perspective view of a vehicle to which a cab front structure according to an embodiment of the present invention is applied; FIG. 1 is an assembly perspective view of a main part of a front structure of a cab according to one embodiment of the present invention; FIG. Figure 2 is a side sectional view of the front structure of the cab at II shown in Figure 1; It is the back view which looked at the front cover from the vehicle rear. FIG. 12 is a rear view of the front cover showing a modified example in which a sealing member is partially provided;

An embodiment of the present invention will be described below with reference to the drawings. In the following description, the vertical direction indicates the vehicle height direction (vertical direction), the lateral direction indicates the width direction of the vehicle, and the front-rear direction indicates the traveling direction of the vehicle.

FIG. 1 is a perspective view from the left front of a vehicle to which a cab front structure according to one embodiment of the present invention is applied.

The vehicle shown in FIG. 1 is a freight vehicle such as a truck, and the cab front structure 1 of the present embodiment is applied to a cab 2 arranged on the front side of the vehicle. The cab 2 mainly has a floor panel 3 on the bottom, a front panel 4 and a front window 5 on the front, a roof panel 6 on the top, doors 7 and side panels 8 forming door openings on both sides, and a back panel ( (not shown) are provided to form a substantially box-shaped compartment. These panels are manufactured by molding sheet metal.

On the front surface of the cab 2, between the front panel 4 and the front window 5, mirror covers 9 are provided on both left and right sides and a front cover 20 is provided in the center. The mirror cover 9 and the front cover 20 are manufactured by molding resin.

FIG. 2 is an assembly perspective view of the main parts of the front structure of the cab according to one embodiment of the present invention.

As shown in FIG. 2, the mirror cover 9 and the front cover 20 are not shown so as to cover from the front of the vehicle a band-shaped groove 11 provided in the vehicle width direction on the lower edge side of the front window 5 on the upper portion of the front panel 4. It is attached with a fastening member or the like.

3 is a side cross-sectional view of the main part of the front structure of the cab taken along line II shown in FIG. 1. FIG. FIG. 4 is a rear view of the front cover viewed from the rear of the vehicle.

As shown in FIG. 3, the groove portion 11 is recessed rearward in the upper portion of the front panel 4 to form a space between the groove portion 11 and the front cover 20 provided on the front side thereof. Specifically, the groove portion 11 includes a first rear wall portion 11a extending downward from the vicinity of the lower edge of the front window 5 substantially parallel to the front window 5, and extending rearward from the lower end of the first rear wall portion 11a. the second rear wall portion 11b, the third rear wall portion 11c extending downward from the rear end of the second rear wall portion 11b, and the fourth rear wall extending forward from the lower end of the third rear wall portion 11c. a portion 11d, a fifth rear wall portion 11e extending downward and forward from the front end of the fourth rear wall portion 11d, and a sixth rear wall portion 11f extending forward from the lower end of the fifth rear wall portion 11e. have. In addition, the groove portion 11 is connected to the front window 5 via an upper connecting member 12. The upper connecting member 12 is made of resin such as rubber, and extends along the lower edge of the front window 5 in the vehicle width direction. is provided in

As shown in FIGS. 3 and 4, the front cover 20 includes a first front wall portion 20a that mainly forms an upper portion, a fourth front wall portion 20d that forms a lower portion, a first front wall portion 20a and a fourth front wall portion 20d. It is formed from a second front wall portion 20b and a third front wall portion 20c that form a recess rearward between the front wall portion 20d and the front wall portion 20d. Specifically, the first front wall portion 20a has its upper end in contact with the lower end of the upper connecting member 12, and extends forward and downward from the lower end of the upper connecting member 12 to near the front extension line of the fourth rear wall portion 11d. do. The second front wall portion 20b (indicated by a dashed line in FIG. 3) extends rearward from the lower end of the first front wall portion 20a to near the front end of the fourth rear wall portion 11d. The third front wall portion 20c extends forward from the rear end of the second front wall portion 20b to near the front end of the fourth front wall portion 20d. The fourth front wall portion 20d extends downward from the front end of the third front wall portion 20c to near the front end of the sixth rear wall portion 11f. are doing. While the front cover 20 is attached to the front panel 4, the front surface of the front cover 20 is attached at a position where there is almost no difference in level with the front surface of the front panel 4. However, the lower end of the front cover 20 is not in contact with the front panel 4. First, the gap 31 is open.

As shown in FIGS. 2 to 4, the front cover 20 also has holes 32 on the right side and near the center of the upper portion for holding the wiper shaft 13 of the wiper device and the like via the holding portion 14 made of resin. . The drive mechanism, wiring, etc. of the wiper device are accommodated in the space between the groove portion 11 and the front cover 20 . Further, the front cover 20 is provided with holes (not shown) for fastening members for fixing the front cover 20 to the front panel 4 .

The front cover 20 is further provided with an opening 33 for introducing outside air in a part of the second front wall portion 20b in the vehicle width direction.

The front cover 20 extends rearward from the rear surface of the fourth front wall portion 20d, that is, the rear surface when the front side of the front cover 20 is viewed as the front side, substantially perpendicularly and rearward with a length L shown in FIG. 3, and extends in the vehicle width direction. A reinforcing rib 23 is formed extending to the . Further, the reinforcing rib 23 is provided at a position where the distance from the upper surface of the sixth rear wall portion 11f is slightly smaller than L. The upper surface of the sealing member 15 having a substantially square side cross section with a side length of approximately L is fixed to the lower surface of the reinforcing rib 23 by adhesion or the like. Further, the seal member 15 is fixed so as to contact the rear surface of the fourth front wall portion 20d and the upper surface of the sixth rear wall portion 11f. In this embodiment, the reinforcing rib 23 is formed with an inclination toward the sixth rear wall portion 11f toward the rear with respect to the upper surface of the sixth rear wall portion 11f. Therefore, the seal member 15 fixed to the lower surface of the reinforcing rib 23 is in a state in which the corner of the rear lower portion (the portion indicated by C in FIG. 3) is pressed against the upper surface of the sixth rear wall portion 11f. The seal member 15 is made of a resin having relatively weak elasticity, such as sponge, and is easily deformed against the contact portion, and can absorb increases and decreases in the gap 31 due to vibration caused by running of the vehicle. can. That is, the gap 31 is filled with the sealing member 15 .

Further, a reaction force due to contraction of the seal member 15 is generated in the direction of the arrow indicated by D in FIG. The reinforcing rib 23 is set to have a thickness in the vertical direction and a length in the front-rear direction that can ensure sufficient rigidity against this reaction force. That is, the reinforcing rib 23 has a thickness that can offset the vertical component of the reaction force indicated by the arrow D. As shown in FIG. Thereby, the degree of close contact between the seal member 15 and the sixth rear wall portion 11f can be maintained. In addition, the reinforcing rib 23 has a length that can offset the front-rear component of the reaction force indicated by the arrow D. As shown in FIG. In this embodiment, the length of the reinforcement rib 23 in the front-rear direction is approximately the same as the length L of one side of the seal member 15 . As a result, the front cover 20 is prevented from protruding forward, and the appearance of the front surface of the cab 2 is not spoiled.

In the cab front structure 1 configured as described above, the rigidity of the front cover 20 is improved by providing the reinforcing ribs 23 extending in the vehicle width direction on the rear surface (rear side of the vehicle) of the front cover 20 . , to prevent the front cover 20 from vibrating slightly due to the vibration of the vehicle. In addition, since the sealing member 15 is provided so as to fill the gap 31 between the front panel 4 and the front cover 20 by utilizing the reinforcing rib 23, wind noise caused by the gap 31 between the front cover 20 and the front panel 4 can be prevented. can be prevented.

Although the description of the embodiment of the cab front structure according to the present invention has been completed above, the aspect of the present invention is not limited to this embodiment.

In the above-described embodiment, the sealing member 15 is provided over the entire vehicle width direction, but it may be provided intermittently as in the modification shown in FIG. Alternatively, the seal member 15 may be made of a water-permeable, relatively coarse-mesh sponge or the like. As a result, even if water enters the space between the front cover 20 and the groove portion 11 due to rain or the like, the water is discharged from the gap 31 in the portion where the seal member 15 is not provided, or the water is discharged through a coarse-mesh sponge. or can.

In the above embodiment, the cross-sectional shape of the sealing member 15 is square, but it may be rectangular, trapezoidal or other shape.

1: Front structure 2: Cab 3: Floor panel 4: Front panel 5: Front window 6: Roof panel 7: Door 8: Side panel 9: Mirror cover 11: Groove 11a: First rear wall 11b: Second rear Wall portion 11c: Third rear wall portion 11d: Fourth rear wall portion 11e: Fifth rear wall portion 11f: Sixth rear wall portion 12: Upper connecting member 13: Wiper shaft 14: Holding portion 15: Seal member 20: Front Cover 20a: First front wall portion 20b: Second front wall portion 20c: Third front wall portion 20d: Fourth front wall portion 23: Reinforcement rib 31: Gap 32: Hole 33: Opening 40: Front panel

Claims (1)

A front panel provided on the front of the cab of the vehicle,
a front cover provided above the front panel with a gap from the front panel;
a reinforcing rib provided on the back surface of the front cover and extending in the vehicle width direction;
a sealing member fixed to the reinforcing rib and filling the gap;
cab front structure.

Images