JP2764735B2 - Rear structure of vehicle body - Google Patents

Description

The present invention relates to a rear structure of a vehicle body.
The present invention relates to a structure of a vehicle body having a subframe at a rear portion.

b. Conventional technology For example, in a midship car or the like in which an engine is mounted on a rear part of a vehicle body, the engine is mounted on a subframe, and the subframe is fastened to a cab back cross member, a rear side member and a rear cross member to connect the engine to the vehicle body. It is installed in. In a vehicle having such a vehicle body structure, a tunnel running in the traveling direction of the vehicle is formed in the center of the main floor, and a brake hose, an air conditioner hose, a cooling pipe, and the like are provided in the tunnel from the front to the rear of the vehicle. I'm running. Therefore,
The fastening of the sub-frame to the cab-back cross member is performed at both side ends of the cab-back cross member so as not to hinder the piping of the hoses and pipes.

c. Problems to be solved by the invention By the way, in an automobile, a seat belt is fixed to a floor. Therefore, the floor in the vicinity of the seat belt fixing portion must have a structure that can sufficiently withstand the pulling force of the seat belt generated at the time of a frontal collision.

However, in order to provide the floor with sufficient strength, it is necessary to increase the thickness of each element or to add a reinforcing material, which increases the weight of the vehicle body, which is not preferable.

In addition, it is not preferable to reduce the workability of assembling when connecting a brake hose or the like guided from the front of the vehicle body through the tunnel.

SUMMARY OF THE INVENTION An object of the present invention is to provide a rear structure of a vehicle body that can have a sufficient strength without substantially increasing the weight of the vehicle body and lowering the assembling workability.

d. Means for Solving the Problems The rear structure of the vehicle body of the present invention is a midship type vehicle in which an engine is mounted on the rear of the vehicle body, and a subframe on which the engine is mounted is provided at both ends of a cabback cross member, In the rear structure of the vehicle body fastened to the rear side member and the rear cross member, the cab back cross members are paired with each other and connected to a tunnel wall surface and a side member provided in the front-rear direction of the vehicle body, respectively. An extension plate attached to the lower back of the back and the lower surface of the floor, one end of which is connected to the pair of cab back cross members near the center of the vehicle body and the other end is connected to the front center of the subframe. I have.

e. Function In the rear structure of the vehicle body of the present invention, since the subframe is fastened also at the center of the cabback cross member,
An external force such as a seat belt pulling force is also received by the subframe, and the deformation of the floor is suppressed. In addition, the rear structure of the vehicle body is such that the subframe is fastened directly to the vehicle body, then the piping such as brake hoses and engine cooling pipes are passed through the floor tunnel, and then the subframe is connected to the cabback cross member with the extension plate. Can be connected to the central part of If the work is performed in such a procedure, a work space is secured between the tunnel and the subframe during the piping work, so that the work is facilitated.

f. Embodiment FIGS. 1 to 5 show a rear structure of a vehicle body according to the present invention.

The floor 1 of the vehicle body has a tunnel 2 at the center in the width direction, and a lower surface of the floor 1 along the base of the tunnel 2 has a tunnel side member 3 as shown in FIG.
Are welded. The floor 1 has a seat 4
The seat belt 5 is fixed to the side of the seat 4, for example, the side wall of the tunnel 2. Further, the lower edge of the cabback 6 is welded to the edge of the floor 1 as shown in FIG. This cab back 6
Are arranged over the entire width of the vehicle body as shown in FIG. Further, a cabback cross member 8 is arranged on the lower rear surface of the cabback 6. The cross member 8 includes left and right portions, which are welded to the back surface of the cab back 6 and the lower surface of the floor 1 as shown in FIG. Each is welded to the wall.

The vehicle body has a subframe 10 on which the engine 9 is mounted. As shown in FIG. 5, the sub-frame 10 is formed by both side members 10a, 10a, a front cross member 10b, a rear cross member 10c, and vertical members 10d, 10d. Also,
A center member 11 is inserted and fixed between the cross members 10b and 10c, and the engine 9 is mounted on the center member 11. This sub-frame 10 has side members 10a,
The bolt insertion holes 12, 12, 13, and 13 are provided at the extension end of 10a, the center of the front cross member 10b, the center of the rear cross member 10c, and the center of the vertical members 10d and 10d, respectively.
14, 15 and 15, of which the bolts and nuts passed through the holes 12, 14 and 15 were welded to the side member 7 side end of the cabback cross member 8 and both side members 7 by welding. Rear cross member 16 and both side members 7
Respectively.

Furthermore, this vehicle is provided with an extension plate 17, which is a cab-back cross member.
The front cross member portion of the sub-frame 10 is inserted between bolts 8 and 8 and the sub-frame 10, one end of which is connected by bolts at the vehicle body central portion A of the cross members 8 and 8, and the other end of which is inserted through the hole 13. Connected to the center of 10b.

The vehicle body adopting such a rear structure has a sub-frame 10 on which the engine 9 is installed, and side members 7, 7,
The brake hose, the engine cooling pipe, the air conditioner pipe, the compressor hose, etc. led from the front of the vehicle body through the tunnel 2 and then connected to the wheel cylinder, the engine 9, etc. ,
Thereafter, the extension plate 17 is assembled by connecting the extension member 17 between the cross member 8 and the subframe 10.

In the above embodiment, the engine 9 is
Is shown, but a rear suspension may be provided on the sub-frame 10.

g. Effects of the Invention As described above, in the rear structure of the vehicle body according to the present invention,
The sub-frames are also joined at the center in the width direction at the rear end of the floor. Therefore, the tensile force transmitted to the floor via the seat belt is also received by the sub-frame, the deformation of the floor is prevented as much as possible, and also against external force from the side due to a side collision, The deformation of the tunnel is prevented as much as possible.

Moreover, in the rear structure of the vehicle body according to the present invention, the piping work of various hoses and pipes is as easy as before, and the weight of the vehicle body hardly increases.

[Brief description of the drawings]

1 is a plan view conceptually showing a rear structure of a vehicle body according to the present invention, FIG. 2 is a side view thereof, and FIG.
FIG. 4 is a cross-sectional view taken along line III-III, FIG. 4 is a cross-sectional view taken along line IV-IV in FIG. 2, and FIG. 5 is a perspective view conceptually showing a subframe and an engine. 1 ... floor, 2 ... tunnel, 3 ... tunnel side member, 4 ... seat, 5 ... seat belt, 6 ... cab back, 7 ... side member, 8 ... cab back cross member, 9 ... ... engine, 10 ... subframe,
10a ... side member, 10b ... front cross member, 10c ... rear cross member, 10d ... vertical member, 11 ... center member, 12, 13, 14, 15 ... bolt insertion hole, 16 …… Rear cross member, 17 …… Extension plate, A …… Central part of body.

Claims (1)

(57) [Claims] 1. A midship type vehicle having an engine mounted on a rear portion of a vehicle body, wherein a subframe mounting the engine is fastened to both side ends of a cabback cross member, a rear side member, and a rear cross member. In the structure, the cabback cross members are paired with each other and coupled to a tunnel wall surface and a side member provided in the front-rear direction of the vehicle body, and are attached to a lower back surface of the cabback and a lower surface of the floor, A rear structure of a vehicle body, wherein one end is provided at a position near the center of the vehicle body between the pair of cab back cross members, and an extension plate is connected at the other end to a front center portion of the subframe.