JP6430180B2 - Car box reinforcement structure - Google Patents

Description

  The present invention can avoid a reduction in rigidity of a cargo box frame when a concave portion that avoids interference with vehicle body side parts is formed in the cargo box frame in an automobile in which the cargo box is mounted on the vehicle body frame. The present invention relates to the packing box reinforcing structure.

For example, in an automobile such as a truck, a cargo box is mounted on a rear portion of a cabin of a body frame (see, for example, Patent Document 1). In such an automobile, for example, a body side part such as a breather hose may be disposed so as to pass between the body frame and the cargo box frame when viewed from the side of the vehicle, and for example, a cross member of the body frame. In some cases, the vehicle body side parts such as are arranged so as to cross the lower surface of the cargo box frame in the vehicle width direction.

Japanese Utility Model Publication No. 63-164092

  In an automobile equipped with the packing box, there is a demand to make the ground height of the packing box as low as possible in order to improve the loading and unloading workability. If it is attempted to lower the cargo box in response to this request, the cargo box frame may interfere with the vehicle body side parts. In order to avoid this problem of interference, it is conceivable to form a recess in the cargo box frame in accordance with the shape of the vehicle body side part. However, since the packing box frame is for supporting most of the loads acting on the packing box, there is a problem that the rigidity of the entire packing box is lowered by simply forming a recess in the packing box frame.

  The present invention has been made in view of the above-described conventional situation, and it is an object of the present invention to provide an automobile luggage box reinforcing structure capable of avoiding a reduction in rigidity of a luggage box while forming the recess.

In the present invention, a cargo box having a cargo box frame having a side frame extending in the vehicle longitudinal direction is mounted on a vehicle body frame extending in the vehicle longitudinal direction, and the vehicle body side component is placed on the lower surface of the side frame in the vehicle width direction. In the car box reinforcement structure arranged across
On the lower surface of the side frame, a recess in which the vehicle body side part is disposed is formed so as to be recessed upward, and reinforcing means extending in the vehicle front-rear direction so as to follow the recess shape of the recess is added to the recess, The reinforcing means includes a convex bead formed so as to protrude upward along the concave portion, and a reinforcing pipe fixed in contact with a side surface of the convex bead. Yes.

  According to the present invention, since the concave portion is formed on the lower surface of the side frame forming the main of the packing box frame and the vehicle body side parts are arranged so as to cross the concave portion, the side frames are prevented from interfering with the vehicle body side parts. However, the ground clearance of the packing box can be lowered, and the loading and unloading workability can be improved.

  Further, since a reinforcing means extending in the vehicle longitudinal direction, for example, a reinforcing pipe or a reinforcing rib, is added so as to follow the concave shape of the concave portion, it is possible to avoid a decrease in rigidity when viewed in the packing box frame and the entire packing box.

It is a side view of the small dump truck provided with the packing box reinforcement structure concerning Example 1 of the present invention. It is a bottom perspective view of the packing box reinforcing structure. It is a bottom perspective view of the packing box floor of the packing box reinforcement structure. It is the cross-sectional side view cut along the side frame of the said packing box reinforcement structure. FIG. 5 is a cross-sectional rear view (cross-sectional view taken along the line V-V in FIG. 4) of the packing box reinforcing structure. FIG. 5 is a cross-sectional rear view (cross-sectional view taken along line VI-VI in FIG. 4) of the packing box reinforcing structure. FIG. 7 is a sectional rear view of the packing box reinforcing structure (sectional view taken along line VII-VII in FIG. 4). FIG. 5 is a cross-sectional rear view (cross-sectional view taken along line VIII-VIII in FIG. 4) of the packing box reinforcing structure.

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

  1 to 8 are views for explaining a packing box reinforcing structure for a small dump truck according to Embodiment 1 of the present invention.

  In the figure, reference numeral 1 denotes a small dump truck. The dump truck 1 has a cabin 3 mounted on the front part of the body frame 2, and a cargo box 4 mounted on the rear part so as to be able to swing up and down around the rear end part. It has a schematic structure. In addition, 6 is a front wheel and 7 is a rear wheel.

  The vehicle body frame 2 is a so-called ladder frame in which a pair of left and right side members 2a, 2a extending in the vehicle front-rear direction are coupled by a front cross member (not shown), a midway cross member 2b, and a rear cross member 2c. Further, the vicinity of the front edge of the rear wheel 7 of the side members 2a, 2a is joined by a dump cross member 2d that supports the dump cylinder 5.

The left and right side members 2a and 2a have left and right side walls 2k and 2k, and a bottom wall 2m, respectively, and have a cross-sectional hat shape that opens upward, and the openings are installed on the flange portions 2n and 2n. The closed lid member 2j is closed, thereby forming a closed cross-sectional structure extending in the vehicle front-rear direction.

Further, on the left and right side members 2a and 2a, a front leg portion 2g, an intermediate leg portion 2e and a rear leg portion 2f for supporting the packing box 4 are erected.

  The packing box 4 includes a rectangular packing box floor 8, a front wall 15 a erected on the front edge of the packing box floor 8, and left and right supported to be opened and closed at the left and right edges. Side gates 15b, 15b, and a rear gate 15c supported at the rear edge so as to be opened and closed.

The cargo box floor 8 has swinging cylinder portions 8a, 8a provided at rear end portions thereof, and swing shaft portions 2i, 2i provided at rear end portions of the left and right side members 2a of the body frame 2. Is supported so as to swing up and down.

  The packing box floor 8 has a floor panel 10 mounted on the upper surface of the packing box frame 9 and is fixed by welding or the like. The floor panel 10 is formed by forming a convex bead 10b extending in the vehicle longitudinal direction on a rectangular flat plate 10a with a predetermined interval in the vehicle width direction.

The packing box frame 9 extends in the vehicle width direction at the front end, the rear end cross frames 11a and 11b, and the rear edge of the maintenance opening 8b extending in the vehicle width direction at the front and rear ends of the packing box floor 8. The vehicle has a rear edge cross frame 11c and left and right side members 11d and 11d that extend in the vehicle front-rear direction at the left and right edge portions. Further, the vehicle is slightly inward in the vehicle width direction from the left and right side members 11d and 11d. The left and right side frames 12 and 12 extend in the front-rear direction and connect the rear edge cross frame 11d and the rear end cross frame 11b. The left and right side frames 12, 12 and the left and right side frames 12 and the left and right side members 11d are connected by a plurality of cross members 11e.

  The left and right side frames 12 and 12 are main frames that bear much of the load acting on the cargo box 4, and have the following detailed structure to achieve high rigidity. That is, the side frame 12 is integrally formed with vertical walls 12a and 12a, a bottom wall 12b connecting the lower ends of the vertical walls 12a and 12a, and a flange portion 12c formed by bending the upper end outward. And has a cross-sectional hat shape with an upward opening. A convex bead 10b of the floor panel 10 is stretched over the flange portions 12c and 12c and fixed by welding. As a result, the side frame 12 forms a closed cross section that extends in the vehicle front-rear direction with the convex bead 10b of the floor panel 10, thereby ensuring the necessary rigidity and strength.

  A member recess 12d that avoids interference with the midway cross member 2b is formed in the lower part of the middle part in the front-rear direction of the left and right side frames 12 and 12, and a breather pipe 14 is formed at the rear end. A breather recess 12e for avoiding interference is formed. The blazer pipe 14 and the midway cross member 2b are arranged such that all or part of the blazer pipe 14 and the midway cross member 2b enter the breather recess 12e and member recess 12d.

  The member concave portion 12d and the breather concave portion 12e are formed by denting the bottom wall 12b of the side frame 12 upward so as to form a smooth curved surface, and therefore the central portions in the front-rear direction of the concave portions 12d and 12e are formed. The dent is the largest, and the dent becomes smaller from here to the front and back. Furthermore, a pair of protruding beads 12f, 12f projecting inward are formed on the bottom wall 12b 'forming the curved surface so as to follow the curved surface. A reinforcing pipe 13 is disposed between the pair of protruding beads 12f, 12f. The reinforcing pipe 13 is formed so as to follow the shape of the curved surface, and consequently the curved shape of the protruding bead 12f, and is welded and fixed near the top of the pair of protruding beads 12f, 12f.

Also, one end 13a of the reinforcing pipe 13 disposed in the breather recess 12e is compressed and deformed in a vertical direction to become flat, and the bottom surface of the rear end cross frame 11b and the bottom wall 12b of the side frame 12 Inserted and fixed between.

The convex beams 12f and 12f and the reinforcing pipe 13 constitute reinforcing means 16 for reinforcing the concave portions 12d and 12e.
According to this embodiment, a member recess 12d and a breather recess 12e are formed in the bottom wall 12b of the side frame 12 constituting the main part of the cargo box frame 9, and a midway cross as a vehicle body side part is formed in the recesses 12d and 12e. Since the beam 2b and the breather pipe 14 are arranged, it is possible to avoid the cargo box frame 9 from interfering with the vehicle body side parts, and the ground height of the cargo box 4 can be lowered.

  Further, since the concave portions 12d and 12e having the curved shape are reinforced by the convex beam 12f and the reinforcing pipe 13 extending in the vehicle front-rear direction along the curved shape of the concave portion, the rigidity of the cargo box frame 9 and the cargo box 4 as a whole. Decrease can be avoided.

  Moreover, since the convex bead 12f which protrudes upwards on both sides of the reinforcing pipe 13 is formed and the top of the convex bead 12f is welded to the reinforcing pipe 13, the reinforcing pipe 13 can be reliably welded to the side frame 12, Also from this point, the concave portions 12d and 12e can be reliably reinforced.

  In addition, although the said Example demonstrated the case where the recessed parts 12d and 12e for avoiding interference with the cross beam 2b and the breather pipe 14 were formed in the side frame 12 of the cargo box 4, this invention is other than the above. Of course, the present invention can also be applied to the case where the vehicle body side parts are arranged so as to cross the lower surface of the side frame.

  Furthermore, in the above-described embodiment, the case of a small dump truck has been described. However, the scope of application of the present invention is not limited to the dump truck, and the main point is that a cargo box having a cargo box frame is mounted on the body frame. Any vehicle can be applied.

2 Body frame 2b, 14 Cross member, breather pipe (body side parts)
4 Packing box 9 Packing box frame 12 Side frames 12d, 12e Recess 16 Reinforcing means

Claims (1)

A cargo box having a cargo box frame having side frames extending in the vehicle longitudinal direction is mounted on the vehicle body frame extending in the vehicle longitudinal direction, and the vehicle body side parts are arranged so as to cross the lower surface of the side frame in the vehicle width direction. In the car box reinforcement structure,
On the lower surface of the side frame, a recess in which the vehicle body side part is disposed is formed to be recessed upward, and reinforcing means extending in the vehicle front-rear direction so as to follow the recess shape of the recess is added to the recess,
The reinforcing means includes a convex bead formed so as to protrude upward along the concave portion, and a reinforcing pipe fixed in contact with a side surface of the convex bead <br / > A carton box reinforcement structure characterized by that.

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