CN-122003356-A - Rear structure of vehicle body

CN122003356ACN 122003356 ACN122003356 ACN 122003356ACN-122003356-A

Abstract

A vehicle body rear structure comprising a side sill (20) and a rear frame (40), wherein the end portion of a frame floor portion (49) is placed on an inner protruding portion (27), and a frame ceiling portion (48) is covered on an inner ceiling portion (25), and in this configuration, the rear frame (40) is fixed to the side sill (20) by means of rivets (65) or the like.

Inventors

XU QICHUN
She extensively sets by rattan
TAMURA MASAYUKI

Assignees

株式会社技克拓
株式会社阿雷斯提

Dates

Publication Date: 20260508
Application Date: 20250624
Priority Date: 20240904

Claims (8)

1. A vehicle body rear structure comprising a side sill and a rear frame extending rearward of a vehicle body from the side sill, wherein, The side sill includes a side sill outer disposed outside the vehicle body and a side sill inner disposed inside the vehicle body with respect to the side sill outer, The side sill inner member has an inner wall portion extending vertically, an inner ceiling portion extending from an upper end of the inner wall portion to an outside of the vehicle body, an inner flange portion extending upward from a distal end of the inner ceiling portion, and an inner projecting portion projecting laterally inward of the vehicle body from halfway in a height direction of the inner wall portion, The front part of the rear frame is provided with a frame wall part extending up and down in a コ -shaped cross section, a frame ceiling part extending from the upper end of the frame wall part to the outer side of the vehicle body, and a frame floor part extending from the lower end of the frame wall part to the outer side of the vehicle body, The end part of the frame floor part is arranged on the inner protruding part, the frame ceiling part is covered from the upper part of the inner ceiling part, In this configuration, the front portion of the rear frame is fixed to the side sill.
2. The vehicle body rear structure according to claim 1, wherein, The rear frame further has an inner rib-like flange extending laterally inward of the vehicle body from an upper end or halfway in the height direction of the frame wall portion.
3. The vehicle body rear structure according to claim 1, wherein, The inner extension is a bracket separate from the inner wall portion.
4. The vehicle body rear structure according to claim 1, wherein, The inner protruding portion is a cut-and-raised piece obtained by cutting a slit into the inner wall portion and bending the slit.
5. The vehicle body rear structure according to claim 1, wherein, The vehicle body rear structure further includes a floor cross member extending toward the inside of the vehicle body perpendicularly to the side sill inner member, and a front end portion connecting member connecting the rear frame and the floor cross member, The front end connecting member is composed of a connecting portion floor portion along the frame floor portion, a connecting portion wall portion along the frame wall portion, and a connecting portion ceiling portion along the frame ceiling portion, The front end connecting member surrounds a front end of the rear frame.
6. The vehicle body rear structure according to claim 1, wherein, The vehicle body rear structure further includes a rear wheel house and a floor panel, The rear frame has a frame wall portion extending vertically in the center thereof, a frame ceiling portion extending from an upper end of the frame wall portion to an outside of the vehicle body, a frame flange portion extending upward from a distal end of the frame ceiling portion, a frame floor portion extending from a lower end of the frame wall portion to an outside of the vehicle body, and an inner rib-like flange extending laterally from a lower end of the frame wall portion to an inside of the vehicle body, The rear wheel cover is joined to the frame flange portion, and the floor panel is joined to the inner rib flange.
7. The vehicle body rear structure according to claim 1, wherein, The rear frame has a plurality of I-ribs traversing the コ -shaped cross section.
8. The vehicle body rear structure according to claim 5, wherein, The rear frame is a die-casting product of aluminum alloy, The front end connecting member is a press-formed product of a steel plate, The rear frame and the front end connecting member are joined by at least one of mechanical fastening, welding, and bonding.

Description

Rear structure of vehicle body Technical Field The present invention relates to a vehicle body rear structure including a side sill and a rear frame. Background Various vehicle body rear structures including a side sill and a rear frame have been proposed (for example, refer to patent document 1 (fig. 3)). Patent document 1 will be described based on the following drawings. Fig. 12 is a main part sectional view of a conventional vehicle body rear structure. In this vehicle body rear structure, the rear frame 104 is fitted to the side sill 101 composed of the side sill outer 102 and the side sill inner 103 from the vehicle body inner side, and the two members are joined at the joint portion 105. The rear frame 104 is a cast product having a thicker wall thickness than the side sill 101. The joining process of the side sill 101 and the rear frame 104 is studied. With the side sill 101 stationary, the rear frame 104 is moved horizontally. The center in the height direction of the rear frame 104 is aligned with the center in the height direction of the side sill 101. That is, in the conventional vehicle body rear structure, the rear frame 104 needs to be lifted and lowered while being horizontally moved with respect to the side sill 101. It is not easy to fit the rear frame 104 while horizontally moving the rear frame 104. Therefore, the manufacturing cost of the vehicle body rear structure increases. However, it is demanded to provide the vehicle at low cost, and as a part of this, it is demanded to reduce the manufacturing cost of the vehicle body rear structure. Prior art literature Patent literature Patent document 1 Japanese patent application No. 7074039 Disclosure of Invention Problems to be solved by the invention The invention provides a vehicle body rear structure capable of reducing manufacturing cost. Means for solving the problems The invention according to claim 1 is a vehicle body rear structure including a side sill and a rear frame extending rearward of the vehicle body from the side sill, wherein the side sill includes a side sill outer disposed outside the vehicle body and a side sill inner disposed inside the vehicle body from the side sill outer, the side sill inner has an inner wall portion extending vertically, an inner ceiling portion extending outward of the vehicle body from an upper end of the inner wall portion, an inner flange portion extending upward from a distal end of the inner ceiling portion, and an inner projecting portion extending laterally inward of the vehicle body from a height direction halfway of the inner wall portion, a front portion of the rear frame has a frame wall portion extending vertically in a コ -shaped cross section, a frame ceiling portion extending outward of the vehicle body from an upper end of the frame wall portion, and a frame floor portion extending outward of the vehicle body from a lower end of the frame wall portion, a distal end portion of the frame floor portion is placed in the inner ceiling portion, and the frame floor portion is fixed to the lower ceiling portion, and a front portion is fixed to the front portion. Effects of the invention In the invention according to claim 1, the distal end portion of the frame floor portion is placed on the inner protruding portion, and the frame ceiling portion is covered from above the inner ceiling portion. That is, the rear frame can be fixed to the side sill only by lowering the rear frame from the upper side to the stationary side sill. The horizontal movement of the rear frame is not necessary as long as it moves from top to bottom. It is easy to move the rear frame downward. Therefore, the manufacturing cost of the vehicle body rear structure can be reduced. Drawings Fig. 1 is a side view of a vehicle body rear structure of the present invention. Fig. 2 is a view as seen along arrow 2 of fig. 1. Fig. 3 (a) is a side view of the rear frame, fig. 3 (b) is a sectional view taken along line b-b of fig. 3 (a), and fig. 3 (c) is a sectional view taken along line c-c of fig. 3 (a). Fig. 4 (a) is an enlarged view of a portion 4a of fig. 3 (b), fig. 4 (b) is an enlarged view of a portion b of fig. 4 (a), and fig. 4 (c) is a diagram showing a modification of the center of the rear frame. Fig. 5 (a) is an exploded view of the side sill, and fig. 5 (b) is a cross-sectional view of the side sill. Fig. 6 (a) is a view for explaining a process of joining the rear frame and the side sill, fig. 6 (b) is a cross-sectional view taken along line 6b-6b of fig. 2, fig. 6 (c) is an enlarged view of a portion c of fig. 6 (b), and fig. 6 (d) is an enlarged view of a portion d of fig. 6 (b). Fig. 7 (a) is an exploded view of the distal end connecting member, and fig. 7 (b) is a cross-sectional view of the distal end connecting member. Fig. 8 (a) is a diagram illustrating a process of joining the rear frame to the side sill and a process of joining the front end portion connecting member to the rear frame, fig. 8 (b) is a cro