JPH1178996A - Cabover car - Google Patents

Abstract

PROBLEM TO BE SOLVED: To increase safety by disposing a lateral frame at the rear of a cab, holding the cab on the lateral frame at the front side, and providing a cab escaping mechanism to escape the cab from the frame to the diagonal upper rear side so as to absorb impact produced at a head-on collision, secure a survival space for occupants. SOLUTION: When a cabover car 1 causes a head-on collision, the impact absorbing part K of a frame 2 is collapsed in longitudinal direction and, at the same time, an impact force transmitting member 11 is rotated about its front end, and then its rear end is moved upward so as to hold the shape of the impact force transmitting member 11. In this case, a movable lateral frame 13 is moved upward as the rear end of the impact force transmitting member 11 is moved upward, and a pair of link members 17 and 20 of a cab escaping mechanism 21 are rotated about its rear end. Thus the movable lateral frame 13 is rotated so that it is raised bay the lateral frame in diagonal rearward, and a cab 4 held by the movable lateral frame 13 escapes in diagonal upper rearward with its shape held as it is, thus securing the survival space for occupants.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cab-over vehicle, and more particularly, to a structure for securing a living space for an occupant in a frontal collision.

[0002]

2. Description of the Related Art A cab-over vehicle shown in FIG. 6 is generally known. In the figure, reference numeral 101 denotes a cab-over vehicle. The cab-over vehicle 101 has a frame 102. The frame 102 has two side members 103, 103 having a U-shaped cross-section arranged in parallel and side members 103, 103. It is composed of a plurality of cross members (not shown) that are bridged.

[0003] A cab 104 is mounted on a frame 102. The cab 104 is formed in a box shape, is composed of a large number of panels made of a thin metal plate, and has an integral three-dimensional shell structure as a whole. The cab 104 has a floor 105, and a seat 106 is mounted on the floor 105, and a bed 107 is provided behind the seat 106.

[0004] An engine 108 is mounted on the frame 102 below the floor 105 of the cab 104. Further, a bumper 109 is attached to the front end side of the frame 102. In the cab-over vehicle 101, the front surface 104A of the cab 104
Is required to ensure the safety of the occupant at the time of a frontal collision of the cab-over vehicle 101.

Therefore, for example, Japanese Patent Laid-Open No. 7-101354 describes
It is conceivable to provide the frame 102 with an impact absorbing portion for releasing an impact force at the time of a frontal collision as shown in Japanese Patent Application Laid-Open Publication No. H11-209,036.

[0006]

However, in the conventional cab-over vehicle 101, the cab-over vehicle 1
01 at the time of frontal collision, the frame 102 is crushed in the front-rear direction at the shock absorbing portion,
4A was crushed and it was difficult to improve occupant safety.

In particular, the space S between the front surface 104A of the cab 104 and the engine 108 serves as a foot space for the occupant, and it is difficult to secure the space S for the foot space of the occupant when the side member 103 is crushed. The present invention has been made in order to solve the above-mentioned problems, and an object of the present invention is to provide a cab-over vehicle capable of improving the safety by absorbing a shock at the time of a frontal collision and evacuation of the occupant's living space. To provide.

[0008]

According to the first aspect of the present invention,
In a cab-over vehicle having a frame provided with an impact absorbing portion for an impact force in a front-rear direction, a horizontal frame is disposed behind the cab, and a front end of an impact force transmitting member is attached to a front end of the frame. The horizontal frame is provided with a cab retreat mechanism for holding the cab on the front side and for releasing the cab from the frame obliquely rearward, and the rear end of the impact force transmitting member is connected to the cab retreat mechanism. And

According to a second aspect of the present invention, in the cab-over vehicle according to the first aspect, the cab retreat mechanism has a pair of one end connected to the cab side and the other end pivotally mounted on the horizontal frame, and arranged in parallel. It is characterized by being constituted by a link member. According to a third aspect of the invention, in the cab-over vehicle according to the second aspect, the cab is provided with a movable horizontal frame, and one end of a pair of link members is connected to the movable horizontal frame.

(Function) In the first aspect of the present invention,
At the time of a front collision of the cab-over vehicle, the frame is crushed by the shock absorbing portion, and the collision energy is absorbed. At the same time as the frame is crushed in the front-rear direction, the impact transmitting member rotates about its front end, and its rear end moves upward. With the upward movement of the rear end of the impact transmitting member, the cab held by the cab retreat mechanism escapes obliquely rearward with respect to the frame while maintaining its shape.

According to the second aspect of the present invention, the rear end of the impact force transmitting member moves upward at the same time as the frame is crushed in the front-rear direction. Along with the upward movement of the rear end of the impact transmission member, the pair of link members of the cab retreat mechanism rotate around the rear side. The cab rotates so as to be lifted diagonally rearward, and escapes diagonally rearward while maintaining its shape.

According to the third aspect of the invention, the rear end of the impact force transmitting member moves upward at the same time as the frame is crushed in the front-rear direction. Along with the upward movement of the rear end of the impact transmission member, the pair of link members of the cab retreat mechanism rotate around the rear side. The movable horizontal frame of the cab retreat mechanism rotates so that the horizontal frame can be lifted obliquely rearward.

Therefore, the cab held by the movable horizontal frame on the front side of the cab retreat mechanism escapes obliquely upward and rearward while maintaining its shape.

[0014]

Embodiments of the present invention will be described below with reference to the drawings.

A cab-over vehicle according to an embodiment of the present invention will be described with reference to FIGS. In the figure, reference numeral 1 denotes a cab-over vehicle. The cab-over vehicle 1 has a frame 2. The frame 2 includes two side members 3 and 3 having a U-shaped cross section arranged in parallel and side members 3 and 3. It is composed of a plurality of cross members (not shown) that are bridged. The side member 3 is designed to withstand the weight of the luggage and the cab 4, and as shown in FIG. The shock absorber K is used. The shock absorbing portion K is configured to be crushed in the front-rear direction when the frame 2 receives an impact force in the front-rear direction.

A cab 4 is mounted on the frame 2. The cab 4 is formed in a box shape, is composed of a large number of panels made of a thin metal plate, and has an integral three-dimensional shell structure as a whole. The cab 4 has a floor portion 5, a seat 6 is mounted on the floor portion 5, and a bed portion 7 is provided behind the seat 6. The engine 2 is mounted on the frame 2 below the floor 5 of the cab 4.

A bumper 9 is attached to the front end of the frame 2. A horizontal frame 10 is fixedly mounted on the frame 2 behind the cab 4. The horizontal frame 10 is bridged between the side members 3 and 3, and includes a horizontal member 10A and column members 10B and 10 vertically erected at both ends of the horizontal member 10A.
C and a reverse gate shape. The ends 10D and 10E of the horizontal member 10A are located outside the side surfaces 4A and 4B of the cab 4. The upper ends 10F of the pillar members 10B and 10C,
10G has almost the same height as the roof 4C of the cab 4.

The front end 3B of the web 3A of each side member 3
The front end 11 of the impact force transmitting member 11 composed of a link member
A is pivotally mounted via a pin 12. Cab 4
A movable horizontal frame 13 is provided. The movable horizontal frame 13 includes a shaft 14 and column members 15 and 16 erected vertically at both ends of the shaft 14. The shaft 14 is arranged at a height near the floor 5, penetrates the left and right side surfaces 4 </ b> A, 4 </ b> B of the cab 4 and penetrates outside the cab 4. Thereby, the internal space of the cab 4 is secured. Further, the shaft 14 has a portal portion 14A in the center, and interference with the engine 8 is prevented by the portal portion 14A.

The height positions of the upper ends 15A, 16A of the column members 15, 16 are set at the upper ends 10F, 10F of the column members 10B, 10C.
It is substantially the same as the height position of G. A rear end 11 </ b> B of the impact force transmitting member 11 is mounted on the shaft 14.
Also, the front end 17 of the first link member 17 is attached to the shaft 14.
A is axially mounted via a stopper 18. The rear end 17B of the first link member 17 is connected to the horizontal frame 1
0 is attached to the horizontal member 10A.

The front ends 20A, 20A of the second link members 20, 20 are mounted on the upper ends 15A, 16A of the column members 15, 16 of the movable horizontal frame 13. Second link member 2
Rear ends 20B, 20B of 0, 20 are axially mounted on upper ends 10F, 10G of column members 10B, 10C of the horizontal frame 10, respectively. The second link member 20 is disposed outside the cab 4, thereby securing an internal space of the cab 4.

The first link members 17, 17 and the second link members 20, 20 constitute a cab retreat mechanism 21. In this manner, the front ends 17A, 17A of the first link members 17, 17 of the cab retreat mechanism 21 are axially mounted on the shaft 14 of the movable horizontal frame 13, and the cab retreat mechanism 2
Front ends 20A, 20A of the first second link members 20, 20
Are the upper ends 15 of the column members 15, 16 of the movable horizontal frame 13.
A, 16A, and the rear side of the cab retreat mechanism 21 (the rear ends 17B, 17B of the first link members 17, 17 and the second
The link members 20, 20 have their rear ends 20 </ b> B, 20 </ b> B) pivotally mounted on the horizontal frame 10, and include a first link member 17,
The second link member 20 and the column member 1 of the movable horizontal frame 13
5 or 16 and the column member 10B or 10C of the horizontal frame 10 constitute a parallelogram four-node rotating mechanism. That is, the cab retreat mechanism 21 provided on the horizontal frame 10 is connected to the movable horizontal frame 1 provided on the cab 4.
A link mechanism for rotating the cab 4 obliquely upward and rearward with respect to the frame 2 through the frame 3 is formed.

Next, the operation of this embodiment will be described. At the time of a frontal collision of the cab-over vehicle 1, the frame 2 is crushed by the shock absorbing portion K, and the collision energy is absorbed. At the same time that the frame 2 is crushed in the front-rear direction, the impact force transmitting member 11 rotates about its front end 11A and its rear end 11B.
Moves upward, and the shape of the impact force transmitting member 11 is maintained.

As the rear end 11B of the impact transmitting member 11 moves upward, the movable horizontal frame 13 moves upward. The upward movement of the movable horizontal frame 13 causes the pair of link members 17, 17, 20, 20 of the cab retreat mechanism 21 to move.
Rotates around the rear ends 17B, 17B, 20B, 20B. That is, the movable horizontal frame 13 is rotated by the horizontal frame 10 to be lifted obliquely rearward by the rotation of the cab retreat mechanism 21.

As a result, the cab 4 held by the movable horizontal frame 13 escapes obliquely upward and rearward while maintaining its shape, and the occupant's living space is moved (in FIG. 2, the cab 4 is indicated by a dotted line). State to a solid state). According to the above-described configuration, the structure in which the collision energy is absorbed by the shock absorbing portion K of the frame 2 is adopted. The cab 4 is released obliquely upward and rearward by the mechanism 21, and the occupant's living space can be moved obliquely upward and rearward with respect to the frame 2 to improve safety.

In particular, when the cab-over vehicle 1 collides with a relatively low object such as a passenger vehicle, the cab 4 escapes obliquely upward and rearward with respect to the frame 2, so that safety can be improved. Further, since the cab retreat mechanism 21 is a rotatable link mechanism including a pair of link members 17, 17, 20, 20 arranged in parallel, an impact force transmitting member at the time of a frontal collision of the cab-over vehicle 1 is provided. Using the force of 11, the cab retreating mechanism 21 can be rotated to release the cab 4 obliquely upward and rearward with respect to the frame 2, so that the cab retreating mechanism 21 can be simplified.

Further, after attaching the movable horizontal frame 13 to the cab 4 using the existing cab 4, construction is possible, and there is no need to design a cab having a new structure. In the present embodiment, the shock absorbing portion K of the frame 2
Are a plurality of slits 3D, 3D formed in the bent portions 3C, 3C in the cross section of the side member 3 of the frame 2. For example, the number of slits can be reduced to one by lengthening the slits. Also, the shock absorbing part of the frame,
The side member may be formed as a substantially rectangular-shaped bent portion formed along the front-rear direction. Further, the shock absorbing portion of the frame may be formed as a notch formed in an upper plate and a lower plate of a side member of the frame.

In the present embodiment, the cab retreat mechanism 21 is provided with a pair of link members 1 arranged in parallel.
Although it is a rotatable link mechanism consisting of 7, 17, 20, and 20, it is not limited to such a mechanism. Further, in the present embodiment, the horizontal frame 10 is fixed to the frame 2, but may be attached to a mounted object such as a carrier mounted on the frame 2.

In the present embodiment, the movable horizontal frame 13 is fixed to the cab 4, but instead of the movable horizontal frame 13 in the present embodiment, a horizontal aggregate constituting the cab 4 itself, The same function can be provided by projecting the mounting member outward on the side surface of the cab 4.

[0029]

According to the first aspect of the present invention, a structure is adopted in which the impact absorbing portion of the frame absorbs the collision energy. Utilizing the force of the impact force transmitting member at the time of a frontal collision, the cab escape mechanism allows the cab to escape obliquely upward and backward, thereby moving the occupant's living space and improving safety.

According to the second aspect of the present invention, since the cab retreat mechanism is constituted by a pair of link members arranged in parallel, the cab retreat mechanism is rotated to release the cab obliquely rearward. And the cab retreat mechanism can be simplified. According to the third aspect of the invention, since the movable horizontal frame only needs to be attached to the cab, an existing cab can be used.

[Brief description of the drawings]

FIG. 1 is a side view of a cab-over vehicle according to an embodiment of the present invention.

FIG. 2 is a side view showing a state of the cab-over vehicle at the time of a frontal collision.

FIG. 3 is a plan view of the cab-over vehicle.

FIG. 4 is a perspective view of the cab-over vehicle.

FIG. 5 is a perspective view showing a shock absorbing portion of the frame.

FIG. 6 is a side view of a conventional cab-over vehicle.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Cab-over vehicle 2 Frame 4 Cab 10 Horizontal frame 11 Impact force transmitting member 13 Movable horizontal frame 17 First link member 20 Second link member 21 Cab retreat mechanism K Shock absorbing part

Claims (3)

[Claims] 1. A cab-over vehicle having a frame provided with an impact absorbing portion for an impact force in a front-rear direction, wherein a lateral frame is disposed behind the cab, and an impact force transmitting member is provided at a front end of the frame. The horizontal frame is provided with a cab retreat mechanism that holds the cab on the front side and allows the cab to escape obliquely upward and rearward from the frame, and the rear end of the impact transmission member is connected to the cab retreat mechanism. A cab-over vehicle characterized by: 2. The cab retreating mechanism comprises a pair of link members having one end connected to the cab side and the other end pivotally mounted on a horizontal frame and arranged in parallel. The cab-over vehicle described. 3. The cab-over vehicle according to claim 2, wherein a movable horizontal frame is provided on the cab, and one end of a pair of link members is connected to the movable horizontal frame.