JPH11301530A - Cab reinforcement structure of vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent deformation of the cab when external force is applied and ensure cabin space by increasing the rigidity of the entire cab according to simple means. SOLUTION: Vertical beams 1 are provided between a front upper rail 4 and a front mount rail 5 arranged in the center portion and lower portion of the cab front. Cross beams 2 in which the front end in connected to the vertical beams 1 and the rear end is connected to the bed pan rising portion 8 side are provided along the engine hood 10. External force applied to the front of the cab is supported by the entire cab while being dispersed along the external force transmission path composed of the vertical beams 1 and the cross beams 2 and the like and the external force transmission path composed of the front mount rail 5 and the floor 7 and the like. As a result, cab rigidity is improved and deformation thereof is prevented. Also, the cross beams 2 are covered by the console box and the like along with the engine hood 10 such that interior space is not effected.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cab reinforcing structure for a cab of a vehicle such as a truck, and more particularly to a cab reinforcing structure for a vehicle for improving the stiffness of the cab by dispersing the direction of the external force when an external force is applied. .

[0002]

2. Description of the Related Art FIGS. 7 and 8 show a schematic structure of a cab 3 of a vehicle such as a truck. A front upper rail 4 is provided in the center of the front surface of the cab 3 in the vehicle width direction, and a front mount rail 5 is also provided in the lower front portion of the cab 3 in the vehicle width direction. Front upper rail 4
And both sides of the front mount rail 5 are connected to the front pillar 6. In addition, the front pillar 6 is disposed over the vertical direction of the vehicle. As shown in FIGS. 8 and 9, the front skeleton of the cab 3 is formed by the front upper rail 4, the front mounting rail 5, and the front pillars 6, 6.
Further, as shown in FIG. 2, the front upper rail 4 and the front mount rail 5 are made of a high rigidity forming a closed cross section in the shape of a frame, and the front pillar 6 is also made of a high rigidity (a cross-sectional structural diagram is omitted). .

A floor 7 is provided on the floor of the cab 3. Since an engine and the like are arranged at the lower part of the floor 7,
Generally, the floor 7 is formed in a stepped shape that rises rearward, and a bed pan rising portion 8 rises at the rear end. A bed pan 9 extending from the rising end of the bed pan rising section 8 to the rear end substantially in the horizontal direction is formed.

[0004] In addition, the floor 7 is almost at the center of the floor 7.
The engine hood 10 swelling from the surface of the hood is formed. The surface of the engine hood 10 has a contour substantially along the surface of the floor 7, and the rear end thereof has a bed pan rising portion 8.
And the upper surface thereof is arranged on substantially the same plane as the bed pan 9.

As shown in FIGS. 1 and 2, an under frame 11 is fixed to the floor 7, the bed pan rising section 8 and the lower surface of the bed pan 9 to reinforce and support them. As shown in FIG. 7, the cab 3 includes a roof panel 12 connected to the front pillar 6, a rear panel 13, a frame member 14 around the door, and the like.

[0006]

The cab 3 having the above structure
When an external force F acts at the time of a collision or the like as shown in FIG. 10, the external force F is transmitted to the floor 7 via the front mount rail 5 and is supported by the rear panel 13 via the bed pan rising portion 8 and the bed pan 9. Is done. The external force F is supported by the entire cab 3 via a front skeleton constituted by the front mount rail 5, the front pillars 6, 6, and the front upper rail 4.

There are many known techniques for reinforcing the front side of the cab, and examples thereof include Japanese Utility Model Laid-Open No. 63-4784 and Japanese Utility Model Laid-Open No. 63-101284. Showa 6
Japanese Patent Publication No. 3-4784 discloses a "cab frame for a vehicle" in which a front end of a member supporting a floor panel is raised and fixed to a front panel surface to increase rigidity around the front panel and to suppress chatter vibration and the like. Things.
Japanese Unexamined Utility Model Publication No. 63-101284 discloses a "dash panel reinforcement structure" in which a dash panel provided behind a front side rail on the side of an engine room of a cab is provided with a reinforcing material along its longitudinal direction to provide an external force. It suppresses deformation of the cab around the engine room during operation and reduces chatter vibration.

When an external force acts on the cab 3, the external force is divided into a part acting on a path such as the front mount rail 5 and the floor 7 and a part acting on a path such as the front upper rail 4 and the front pillar 6, so that the reaction force as a whole is increased. Emits. On the other hand, as described above, the engine hood 10 is swelled substantially at the center of the floor 7, and a console box or the like is arranged between the driver's seat and the passenger seat of the cab. , The driver's seat and the passenger seat are separated from each other, and cannot be freely moved back and forth. Therefore, even if the reinforcing member is provided around the engine hood 10, it does not hinder the living space in the cab 3.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and improves the rigidity of the cab as a whole by dispersing and supporting the external force applied to the cab more than before, and does not impair the living space. Another object of the present invention is to provide a cab reinforcement structure for a vehicle that can be implemented relatively easily.

[0010]

SUMMARY OF THE INVENTION In order to achieve the above objects, the present invention provides a front upper rail and a front mounting rail which are arranged at the center and lower part of the front of a cab across a vehicle width direction. A front pillar, which is connected to both sides of the cab and extends in the up-down direction of the vehicle and forms a framework of left and right ends of the cab, a floor forming a floor surface of the cab, and a bed pan rising from the rear end of the floor A rising portion, a bed pan extending substantially horizontally from an upper edge to a rear end of the rising portion, an engine hood formed to bulge from the floor and connecting a rear end to the bed pan rising portion; A cab reinforcing structure including a floor, a bed pan rising portion, and an underframe for supporting the bed pan from below, wherein the front upper rail and A longitudinal beam spanning between the serial front mount rail, constitutes a cab reinforcement structure of a vehicle provided with transverse beams spanned between said longitudinal beam and the bed pan rising portion.

[0011] More specifically, the lateral beam is arranged on substantially the same plane as the engine hood. Further, the lateral beam is provided along both sides of the engine hood. Further, the lateral beam is welded to an engine hood.

The external force acting on the front surface of the cab is transmitted through an external force transmission path including a front mount frame and a floor, an external force transmission path including a front upper rail, a front pillar, and the like, and an external force transmission including a vertical beam and a horizontal beam. Separated into routes. In particular, the external force transmission path composed of the vertical beam and the horizontal beam has extremely high strength because the vertical beam is installed on the front upper rail and the front mount rail, and the horizontal beam is installed between the vertical beam and the bed pan side. Therefore, the external force can be sufficiently held. Thereby, the deformation of the cab is sufficiently prevented.
Also, the cross beams are arranged along the engine hood and do not reduce the living space. In addition, both beams are made of relatively simple members, and their mounting structures are simple, so that they can be easily implemented.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a cab reinforcing structure for a vehicle according to the present invention will be described below in detail with reference to the drawings. As shown in FIGS. 1 and 2, a front upper rail 4 disposed at the center of the front surface of the cab 3 (FIG. 7) has a box-shaped closed cross section formed by combining the opening sides of members having a U-shaped cross section. Of high rigidity. On the other hand, the front mount rail 5 is made of a highly rigid member having a closed cross section in which the opening side of a member having a U-shaped cross section is closed with a flat plate. The floor 7 has its front end fixed to the front mount rail 5 and its rear end connected to the bed pan rising section 8. A bed pan 9 is connected to the bed pan rising section 8 which is rising in an inclined manner. These are reinforced by the underframe 11.

As shown in FIGS. 1 and 2, a vertical beam 1 is provided between a front upper rail 4 and a front mounting rail 5. The vertical beam 1 has a box-shaped or channel-shaped cross section. In the present example, two members are provided, and the upper and lower ends thereof are fixed to the front upper rail 4 and the front mount rail 5. In addition,
The interval between the two vertical beams 1 and 1 is substantially equal to the horizontal width of the engine hood 10 in this example.

As shown in FIG. 1 and the like, a horizontal beam 2 is fixed to a vertical beam 1. The horizontal beam 2 is made of a member having an appropriate length disposed along the horizontal direction. The front end of the horizontal beam 2 is fixed to the vertical beam 1, and the rear end of the horizontal beam 2 is fixed to the engine hood 10. The top surface is the engine hood 1
0 is arranged substantially flush with the surface. The lateral beam 2 is arranged along the side surface of the engine hood 10, and in this example, as shown in FIGS. 3, 4, and 5, is composed of a lateral beam 2a having a mountain-shaped cross section.
And is fixed in contact with the upper and lateral surfaces thereof. A horizontal beam 2b for reinforcing the horizontal beam 2a is fixed to the front side of the horizontal beam 2a as shown in FIGS. Thereby, the support rigidity of the lateral beam 2 can be improved. Of course, the portion of the lateral beam 2 that does not contact the engine hood 10 is not fixed as shown in FIG. As described above, a highly rigid external force transmission path including the vertical beam 1 and the horizontal beam 2 is formed.

Next, the operation of the cab reinforcing structure for a vehicle according to this embodiment will be described. As shown in FIG. 6, when an external force F is applied to the front surface of the cab 3, the external force F is divided into three paths as shown. Of course, as described above, the external force is supported by the highly rigid front skeleton composed of the front upper rail 4, the front mounting rail 5, the front pillars 6, 6, and the like. That is, the external force F includes an external force transmission path including the front mount rail 5 and the floor 7, an external force transmission path including the front upper rail 4, the front pillar 6, and the like, and an external force including the vertical beam 1 and the horizontal beam 2. Separated into transmission paths. In particular, the longitudinal beam 1 is fixed at both ends to a high rigidity front upper rail 4 and a front mount rail 5, and is also composed of a rigid body itself, and is further supported on the engine hood side via the horizontal beam 2. Therefore, the manner of transmitting the external force to each member on the cab side is reduced as compared with the external force transmission path of the related art, and the cab can be sufficiently prevented from being deformed. In particular, the transverse beam 2 is connected to the engine hood 1
By fixing the lateral beam 2 to the zero corner portion, the holding rigidity of the lateral beam 2 is further improved, and deformation due to external force is more reliably prevented.

Although the vertical beam 1 does not originally hinder the living space of the cab, the horizontal beam 2 is made of a member that partitions the inside of the cab back and forth, and may affect the living space. However, originally the engine hood 1
Numeral 0 protrudes from the floor 7, and since that portion is covered by a console box (two-dot chain line in FIG. 2), the structure is such that the driver's seat and the passenger seat cannot pass through. Therefore, even if the lateral beam 2 is arranged as shown in the drawing, it does not affect the living space.

As described above, the deformation of the cab due to external force can be greatly reduced, and a sufficient living space can be secured. In the above description, the vertical beam 1 is composed of two members, and the horizontal beam 2 is also composed of two members connected to these members. However, the number is not limited to the illustrated one.
Further, the vertical beams 1 and 1 and the horizontal beams 2 and 2 may be connected by a cross member. Further, a non-connection portion between the lateral beam 2 and the engine hood 10 as shown in FIGS. 2 and 4 may be connected via a connection member.

[0019]

1) According to the cab reinforcing structure for a vehicle according to the first aspect of the present invention, by providing an external force transmission path composed of a vertical beam, a horizontal beam and the like, an external force applied to the cab is provided. Are dispersed, the load on each member is reduced, and deformation of the cab can be sufficiently prevented. Further, the present invention comprises a combination of a vertical beam and a horizontal beam made of relatively simple members, and can be implemented relatively easily. 2) According to the cab reinforcing structure for a vehicle according to claims 2 to 4, the cross beam is substantially coplanar with the engine hood, and is disposed along both sides of the engine hood.
In addition, since it is fixed to the engine hood and is held with high rigidity, and is enclosed with the engine hood by a console box or the like, the living space is not reduced even if there is a lateral beam.

[Brief description of the drawings]

FIG. 1 is a partial perspective view showing the structure of a main part of the present invention.

FIG. 2 is a side view of FIG. 1;

FIG. 3 is an enlarged sectional view taken along line AA of FIG. 2;

FIG. 4 is an enlarged sectional view taken along line BB of FIG. 2;

FIG. 5 is an enlarged sectional view taken along line CC of FIG. 2;

FIG. 6 is a schematic diagram illustrating dispersion of external force according to the present invention.

FIG. 7 is a perspective view showing a schematic structure of a conventional cab.

FIG. 8 is a partial perspective view showing a schematic structure around a front and a floor of a conventional cab.

FIG. 9 is a front view of FIG. 8;

FIG. 10 is a schematic diagram for explaining transmission of external force in a conventional cab.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Vertical beam 2 Side beam 3 Cab 4 Front upper rail 5 Front mount rail 6 Front pillar 7 Floor 8 Bed pan rising section 9 Bed pan 10 Engine hood 11 Under frame 12 Roof panel 13 Rear panel 14 Frame member

Claims (4)

[Claims] 1. A front upper rail and a front mount rail which are disposed in a center portion and a lower portion of a front surface of a cab in a vehicle width direction, and which are connected to both sides thereof and are disposed in a vertical direction of the vehicle. A front pillar that forms a skeleton of the left and right ends of the cab, a floor that forms the floor surface of the cab, a bed pan rising portion that rises from the rear end side of the floor, and approximately from the upper edge of the rising portion toward the rear end. A bed pan extending horizontally, an engine hood formed so as to protrude from the floor and connecting a rear end to the bed pan rising section, an underframe for supporting the floor, the bed pan rising section and the bed pan from below, and the like. And a longitudinal beam erected between the front upper rail and the front mount rail. And a horizontal beam provided between the vertical beam and the bed pan rising portion. 2. The cab reinforcing structure for a vehicle according to claim 1, wherein the cross beam is disposed on substantially the same plane as the engine hood. 3. The cab reinforcement structure for a vehicle according to claim 1, wherein the cross beam is disposed along both sides of the engine hood. 4. The cab reinforcing structure for a vehicle according to claim 3, wherein the lateral beam is welded to an engine hood.