JP2600445B2 - Car side sill rear end structure - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a rear end structure of a side sill of an automobile.

2. Description of the Related Art A side sill of an automobile is formed in a closed cross section by a sill inner and a sill outer, and is disposed at both ends of a vehicle body floor in the front-rear direction to constitute a main skeleton member on the floor side.
This will be described in detail with reference to FIGS. 6 and 7. In FIG. 6, reference numeral 1 denotes a side sill, and the side sill 1 is formed in a closed section by a sill inner 2 and a sill outer 3. Sylinna 2
Is formed in an inverted L-shape in cross section, and the lower end is overlapped with the lower edge flange 6 of the sill outer 3 and the upper edge flange 4
Is superposed on the upper edge flange 5 of the sill outer 3, and the respective superposed portions are joined by spot welding via the sill reinforcement 7. As described above, the side sill 1 constitutes a main frame member in the front-rear direction of the vehicle body floor.
At the time of jacking up the vehicle body, the jack head is applied to this side sill 1 so as to jack up, but the jack up points are in front of the side sill 1 and at the rear end,
It is set near the joint with other strength members. For example,
In the vicinity of the joint between the side sill 1 and the rear wheel house 8, as shown in FIGS.
The jack-up bracket 9 in the shape of a letter is joined and arranged as a jack-up point, and the jack head 11 of the jack 10 is
The lower end flange 6 of the sill outer 3 is engaged with the lower end of the sill inner 2 to prevent rotation, and the jack head 11 is received by the jack up bracket 9, so that jack up input can be borne by the entire side sill 1. It is like that. This similar structure is disclosed, for example, in JP-A-61-215178.
No. in the official gazette.

Problems to be Solved by the Invention Since the jack-up bracket 9 dedicated to jack-up is joined and arranged on the sill inner 2, not only the single item cost of the jack-up bracket 9 increases but also the man-hour for assembling to the sill inner 2 increases. The cost is forced to increase. Apart from such a structural problem of the side sill 1 itself, the subframe of the rear suspension unit is connected to a floor panel via a suspension mount member, and a suspension input from the floor panel to a strength member on the floor side. Since the power is transmitted, in order to obtain a sufficient support rigidity of the rear suspension, it is inevitable to separately provide a reinforcing material or the like.

Accordingly, the present invention provides an automobile that can secure the jack-up support rigidity without requiring a dedicated jack-up bracket and can connect and support the subframe end of the rear suspension unit to increase the support rigidity of the rear suspension unit. The rear end structure of the side sill is provided.

Means for Solving the Problems A sill inner of a side sill extending in the front-rear direction is formed on both sides of a floor of a vehicle body in a U-shaped cross section, and a bottom wall of the sill inner is widened at a rear end and a brace is formed on an upper surface thereof. Are joined and arranged substantially over the front surface, and the sub-frame end of the rear suspension unit is connected and supported via a stay on the lower surface side of the sill inner bottom wall of the brace arrangement portion,
The brace extends to a jack-up point forward of the connection support position.

The suspension input of the rear suspension unit is transmitted directly from the subframe to the rear end of the side sill via the stay. When the vehicle is jacked up, the jack head is received at the jack-up point at the rear end of the side sill by the sill inner bottom wall reinforced with braces.

Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.

In FIGS. 1-4, 12 is a sill inner 13 and a sill outer.
14 and a side sill that forms a closed cross section
13 is formed in a U-shaped cross section, and the upper and lower edge flanges
15 and 16, the upper and lower edge flanges 17,
Polymerization is carried out by sandwiching a sillein force 19 on 18 and each polymerized portion is joined by spot welding. At the rear end of the sill inner 13, a suspension mounting portion 20 is formed with a wide width. For example, in the present embodiment, a brace 21 formed in accordance with the shape of the bottom wall 13a is joined to the inner surface of the bottom wall 13a.
An end of a stay 25 provided at an end of the subframe 24 of the rear suspension unit 23 is connected to a lower surface of the bottom wall 13a reinforced by 21 with a bolt / nut 26.

Also, at a position slightly forward of the stay 25 connecting portion of the bottom wall 13a, a jack head seat portion 22 for receiving the jack head 11 of the jack 10 is formed by bulging downward to form a jack-up point, and The brace 21 is extended and joined to the formed portion of the jack head seat portion 22, and the jack head seat portion 22 is extended by the extended portion 21a.
Has been reinforced. Reference numeral 8a denotes a rear wheel house inner with the rear end of the sill inner 13 abutted and joined; 27, a trailing arm of a rear suspension unit 23; 28, a shock absorber; and 29, a coil spring.

According to the above embodiment structure, when the vehicle body is jacked up, the jack head 11 of the jack 10 is used as a guide for the jack head seat portion 22, and the sill inner 13 and the sill outer
By engaging and stopping the joint of the lower edge flanges 16 and 18 of FIG. 14 and extending the jack 10, the jack head 11 is connected to the joint of the flanges 16 and 18 and the jack head seat of the sill inner 13. The rear wheel house 8, which is received by the part 22, and the jack-up input is entirely borne by the side sill 12, and is another strength member in the vicinity
Distributed. That is, the suspension input from the rear suspension unit 23 is transmitted to the suspension mounting portion 20 of the sill inner 13 via the sub-frame 24 and the stay 25.
Is transmitted to the rear wheel house 8 while the load is borne by the entire side sill 12.

Here, in this embodiment, as described above,
At the rear end of the suspension mounting portion 20, the width of the side sill closed cross-sectional area is enlarged by molding the width of the suspension mounting portion 20, and the brace 21 is joined and arranged from the suspension mounting portion 20 to the jack head seat portion 22. Because of the side sill 12
Because the mechanical strength of the rear end is particularly high,
The jack support rigidity and the suspension support rigidity can be increased without deformation due to jack-up input or suspension input.

Although the brace 21 is joined to the bottom wall 13a of the sill inner 13 in the above embodiment, it may be joined and arranged integrally from the bottom wall 13a to the side wall 13b and the upper wall 13c. Further, in the above-described embodiment, the jack head seat portion 22 is bulged on the bottom wall 13a of the sill inner 13, but in some cases, the jack head seat portion 22 is not bulged and formed on the flat bottom wall 13a. The jack head 11 may be received.In this case, in order to clarify the jack-up point, a notch is provided at the joint of the lower edge flanges 16 and 18 as usual, or a mark by paint is provided. It is good to form it.

Effect of the Invention As described above, according to the present invention, since the jack head can be received on the bottom wall of the sill inner, there is no need for a special jack-up bracket, and the sub-frame of the rear suspension unit is It can be directly supported by the side sill which is a strength member, and since it is reinforced with braces from the sub-frame connecting portion of the sill inner to the jack-up point, it can sufficiently oppose jack-up input and suspension input. , Jack support rigidity and suspension support rigidity can be increased. Further, since the suspension support rigidity can be increased, the sound vibration performance of the vehicle body can be improved. Furthermore, since the rigidity of the member at the rear end of the side sill can be increased, buckling deformation of the side sill at the time of a rear-end collision of the vehicle can be suppressed.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a main part of one embodiment of the present invention, FIG. 2 is a perspective view showing a relationship with a rear suspension unit of the embodiment, and FIGS. 3 and 4 are III-III in FIG. Line, a cross-sectional view along the line IV-IV, FIG. 5 is a side view showing a side frame structure of the vehicle body,
FIG. 6 is a sectional perspective view of a portion corresponding to FIG. 5 VI showing a conventional structure, and FIG. 7 is a sectional view taken along line VII-VII of FIG. 12 ... side sill, 13 ... sill inner, 13a ... bottom wall, 2
1 ... Brace, 22 ... Jack-up point, 23 ... Rear suspension unit, 24 ... Sub-frame, 25 ...
stay.

Claims (1)

(57) [Claims] 1. A sill inner of a side sill extending in the front-rear direction on both sides of a floor of a vehicle body, while having a U-shaped cross section,
The bottom wall of the sill inner is wide-formed at the rear end, and a brace is joined and disposed on almost the entire upper surface of the sill inner, and the lower suspension side of the sill inner bottom wall of the brace arrangement portion is provided with a stay via a stay. A rear end structure of a side sill for an automobile, wherein an end of a sub-frame is connected and supported, and the brace is extended to a jack-up point forward of the connection supporting position.