The portable type crane boom where self-sufficiency type liquid pressure unit is arranged

摘要

This invention, at least the liquid pressure load 1 where it is arranged in portable type crane boom (16,21,28a and 28b) to the portable type crane boom where the self-sufficiency type energy supply 1 where liquid pressure energy is supplied (19) is arranged at least regards (1). Therefore, is arranged in the liquid pressure load which portable type crane boom (1) (16,21,28a and 28b) to as for supply, it is not executed by the liquid pressure unit which is arranged in the revolving superstructure of the crane which for example through the hose, supplies liquid pressure energy to each liquid pressure load, it is executed the upper part range of portable type crane boom or the liquid pressure unit where the 2nd boom section (2) is arranged in the connected part (19) by. The hose which is usually needed in order to supply to liquid pressure load can be deleted liquid pressure unit (19) by arranging directly with respect to boom.