Boom of concrete pump truck and concrete pump truck

Abstract

The present invention provides a boom of concrete pump truck, which has folded state and unfolded state, the boom comprises seven boom sections articulated in sequence, in the folded state, the seven boom sections are essentially arranged in five straight lines staggered to each other, and at least the last two boom sections are in the same straight line. Since the seven sections are essentially arranged in five straight lines staggered from each other, the overall dimensions of the boom sections can be reduced greatly, and the requirement for road conditions can be met easily. Moreover, in the folded state, at least the last two boom sections are in the same straight line; therefore, the flexibility and operability of the boom for material distribution can be greatly improved. The present invention further provides a concrete pump truck that comprises the boom described above.

1 . A boom of concrete pump truck, which has a folded state and unfolded state, wherein, the boom comprises seven boom sections articulated in sequence, in the folded state, the seven boom sections are essentially arranged in five straight lines staggered to each other, and at least the last two boom sections are in the same straight line. 
     
     
         2 . The boom of concrete pump truck according to  claim 1 , wherein, in the folded state, the fourth boom section to the seventh boom section are in two straight lines among the five straight lines. 
     
     
         3 . The boom of concrete pump truck according to  claim 2 , wherein, the fourth boom section and the fifth boom section are in one of the two straight lines, while the sixth boom section and the seventh boom section are in the other one of the two straight lines. 
     
     
         4 . The boom of concrete pump truck according to  claim 3 , wherein, in the folded state, the first boom section and the second boom section are in a first longitudinal plane, the fourth boom section to the seventh boom section are in a second longitudinal plane, the first longitudinal plane and the second longitudinal plane are parallel to each other and spaced from each other, and the third boom section extends between the first longitudinal plane and the second longitudinal plane. 
     
     
         5 . The boom of concrete pump truck according to  claim 4 , wherein, when the boom is folded, the first boom section to the third boom section are folded in a first direction, the fourth boom section is folded onto the third boom section in a second direction that is reversed to the first direction, and the sixth boom section is folded onto the fifth boom section in the first direction. 
     
     
         6 . The boom of concrete pump truck according to  claim 2 , wherein, the fifth boom section, the sixth boom section and the seventh boom section are in one of the two straight lines, while the fourth boom section is in the other one of the two straight lines separately. 
     
     
         7 . The boom of concrete pump truck according to  claim 6 , wherein, in the folded state, the first boom section and the second boom section are in a first longitudinal plane, the fourth boom section to the seventh boom section are in a second longitudinal plane, the first longitudinal plane and the second longitudinal plane are parallel to each other and spaced from each other, and the third boom section extends between the first longitudinal plane and the second longitudinal plane. 
     
     
         8 . The boom of concrete pump truck according to  claim 7 , wherein, when the boom is folded, the first boom section to the third section are folded in a first direction, the fourth boom section is folded onto the third boom section in a second direction that is reversed to the first boom direction, and the fifth boom section is folded onto the fourth boom section in the first direction. 
     
     
         9 . The boom of concrete pump truck according to  claim 1 , wherein, in the folded state, the five straight lines are essentially parallel to each other. 
     
     
         10 . A concrete pump truck, comprising an automobile chassis, a revolving platform, and a boom, the boom is mounted on the automobile chassis via the revolving platform, wherein, the boom is the boom described in  claim 1 . 
     
     
         11 . A concrete pump truck, comprising an automobile chassis, a revolving platform, and a boom, the boom is mounted on the automobile chassis via the revolving platform, wherein, the boom is the boom described in  claim 2 . 
     
     
         12 . A concrete pump truck, comprising an automobile chassis, a revolving platform, and a boom, the boom is mounted on the automobile chassis via the revolving platform, wherein, the boom is the boom described in  claim 3 . 
     
     
         13 . A concrete pump truck, comprising an automobile chassis, a revolving platform, and a boom, the boom is mounted on the automobile chassis via the revolving platform, wherein, the boom is the boom described in  claim 4 . 
     
     
         14 . A concrete pump truck, comprising an automobile chassis, a revolving platform, and a boom, the boom is mounted on the automobile chassis via the revolving platform, wherein, the boom is the boom described in  claim 5 . 
     
     
         15 . A concrete pump truck, comprising an automobile chassis, a revolving platform, and a boom, the boom is mounted on the automobile chassis via the revolving platform, wherein, the boom is the boom described in  claim 6 . 
     
     
         16 . A concrete pump truck, comprising an automobile chassis, a revolving platform, and a boom, the boom is mounted on the automobile chassis via the revolving platform, wherein, the boom is the boom described in  claim 7 . 
     
     
         17 . A concrete pump truck, comprising an automobile chassis, a revolving platform, and a boom, the boom is mounted on the automobile chassis via the revolving platform, wherein, the boom is the boom described in  claim 8 . 
     
     
         18 . A concrete pump truck, comprising an automobile chassis, a revolving platform, and a boom, the boom is mounted on the automobile chassis via the revolving platform, wherein, the boom is the boom described in  claim 9 .