| 主权项 |
1. A truck frame for a construction machine comprising:
a center frame (12) on a central part of which a support cylindrical body (14) is provided and that includes front legs (12B, 12C) and rear legs (12D, 12E) at both sides in the left-right direction; and left and right side frames (25, 29) that are respectively positioned at both sides of said center frame (12) in the left-right direction to be formed extending in the front-rear direction and are respectively mounted to tip ends of said front legs (12B, 12C) and said rear legs (12D, 12E), wherein said center frame (12) comprises: an upper plate (13) on an upper surface side of which said support cylindrical body (14) is provided and at both sides in the left-right direction of which upper front leg portions (13B, 13C) and upper rear leg portions (13D, 13E) are provided; a lower plate (15) that is arranged to face said upper plate (13) in the upper-lower direction and at both sides in the left-right direction of which lower front leg portions (15B, 15C) and lower rear leg portions (15D, 15E) are provided; a front plate (17) that closes a front side position between said upper plate (13) and said lower plate (15); a rear plate (18) that closes a rear side position between said upper plate (13) and said lower plate (15); and left and right side plates (19, 20) that respectively close left and right side positions between said upper plate (13) and said lower plate (15), wherein each of said left and right side frames (25, 29) comprises: an inner surface plate (26A, 30A) positioned in a side of said center frame (12); an outer surface plate (26B, 30B) arranged to face said inner surface plate (26A, 30A) to be spaced therefrom; and an upper surface plate (26C, 30C) that connects an upper end of said inner surface plate (26A, 30A) and an upper end of said outer surface plate (26B, 30B), characterized in that: front flanges (21) protruding in the front-rear direction from said lower front leg portions (15B, 15C) are provided in said lower front leg portions (15B, 15C) forming part of said center frame (12) and rear flanges (22) protruding in the front-rear direction from said lower rear leg portions (15D, 15E) are provided in said lower rear leg portions (15D, 15E), front bolt through holes (23) that penetrate in the upper-lower direction are provided in said front flange (21) and rear bolt through holes (24) that penetrate in the upper-lower direction are provided in said rear flange (22), a front leg mounting member (33) that protrudes toward said center frame (12) to be mounted to said front flange (21) and a rear leg mounting member (36) that protrudes toward said center frame (12) to be mounted to said rear flange (22) are respectively provided in said inner surface plate (26A, 30A) forming each of said left and right side frames (25, 29), and female bolt holes (39) are provided in said front leg mounting member (33) and said rear leg mounting member (36) respectively in positions corresponding to said bolt through holes (23, 24), wherein in a state where said front and rear flanges (21, 22) of said center frame (12) are placed respectively on said front and rear leg mounting members (33, 36) of said left and right side frames (25, 29), said bolts (40) are inserted in said bolt through holes (23, 24) and said female bolt holes (39), thereby mounting said left and right side frames (25, 29) to said center frame (12). |
