Frame joint structure and method
An embodiment frame joint structure includes a plurality of body members, each body member including a closed section portion having a closed section of a set shape and a flange portion integrally extending from the closed section portion, and a plurality of joints, each joint having a first end coupled to a connection point of a respective one of the body members and a second end coupled to an adjacent joint.
1. A frame joint structure comprising:
a plurality of body members, each body member including a closed section portion having a closed section of a set shape and a flange portion integrally extending from the closed section portion; and
a plurality of joints, each joint having a first end coupled to a connection point of a respective one of the body members and a second end coupled to an adjacent joint, wherein a roof panel or a floor panel is spot welded to the flange portion on a same plane of the flange portion and the joints.
2. The frame joint structure of claim 1 , wherein:
the closed section portion forms a circular closed cross section; and
an edge of the closed section and the flange portion are connected through a welding line.
3. The frame joint structure of claim 1 , wherein each of the joints comprises:
a first portion welded to the connection point of the respective body member; and
a second portion extending integrally with the first portion and protruding toward the second end of the adjacent joint.
4. The frame joint structure of claim 3 , wherein each body member includes a joint mounting groove corresponding to a thickness of the first portion formed at the connection point.
5. The frame joint structure of claim 4 , wherein the second portion has a thickness smaller than that of the first portion and is connected to the first portion stepwise.
6. The frame joint structure of claim 3 , wherein the second portions of the joints adjacent to each other overlap each other and are spot welded.
7. The frame joint structure of claim 1 , wherein the body members each include a roof side frame or a floor side frame.
8. A vehicle comprising:
an under body including a chassis frame; and
an upper body mounted on the under body, the upper body comprising a frame joint structure comprising:
a first body member comprising a first closed section portion having a first closed section of a set shape and a first flange portion integrally extending from the first closed section portion;
a first joint coupled to a first connection point of the first body member;
a second body member adjacent to the first body member and comprising a second closed section portion having a second closed section of a set shape and a second flange portion integrally extending from the second closed section portion; and
a second joint coupled to a second connection point of the second body member, wherein the first joint and the second joint are joined to each other between the first and the second connection points; and
a roof panel or a floor panel spot welded to the first flange portion.
9. The vehicle of claim 8 , wherein:
the first closed section portion forms a circular closed cross section; and
an edge of the first closed section and the first flange portion are connected through a welding line.
10. The vehicle of claim 8 , wherein the first and the second body members comprise a roof side frame or a floor side frame.
11. The vehicle of claim 8 , wherein the roof panel or the floor panel is spot welded on the same plane of the first flange portion and the first and the second joints.
12. A frame joint structure comprising:
a plurality of body members, each body member including a closed section portion having a closed section of a set shape and a flange portion integrally extending from the closed section portion; and
a plurality of joints, each joint having a first end coupled to a connection point of a respective one of the body members and a second end coupled to an adjacent joint;
wherein each of the joints comprises a first portion welded to the connection point of the respective body member and a second portion extending integrally with the first portion and protruding toward the second end of the adjacent join; and
wherein each body member includes a joint mounting groove corresponding to a thickness of the first portion formed at the connection point.
13. The frame joint structure of claim 12 , wherein:
the closed section portion forms a circular closed cross section; and
an edge of the closed section and the flange portion are connected through a welding line.
14. The frame joint structure of claim 12 , wherein the second portion has a thickness smaller than that of the first portion and is connected to the first portion stepwise.
15. The frame joint structure of claim 12 , wherein the second portions of the joints adjacent to each other overlap each other and are spot welded.
16. The frame joint structure of claim 12 , wherein the body members each include a roof side frame or a floor side frame.
17. The frame joint structure of claim 1 , wherein a roof panel is spot welded to the flange portion on the same plane of the flange portion and the joints.
18. The frame joint structure of claim 1 , wherein a floor panel is spot welded to the flange portion on the same plane of the flange portion and the joints.
19. The vehicle of claim 8 , wherein the roof panel or the floor panel comprises a roof panel spot welded to the first flange portion.
20. The vehicle of claim 8 , wherein the roof panel or the floor panel comprises a floor panel spot welded to the first flange portion.