초록 ▼

A working tool unit of a construction machine, which excels in transportability and is capable of smoothly carrying out diversified types of work in a wide range, is disclosed. Therefore, the working tool unit according to the present invention includes: a first boom (31a) rockably mounted on a turn

A working tool unit of a construction machine, which excels in transportability and is capable of smoothly carrying out diversified types of work in a wide range, is disclosed. Therefore, the working tool unit according to the present invention includes: a first boom (31a) rockably mounted on a turning frame of a vehicle body; a second boom (3b) mounted to be rockable on the first boom; an arm (32) mounted to be rockable on the second boom; a working tool such as a bucket (33) mounted on said arm; a first boom cylinder (35) mounted on the turning frame (21) and the second boom to rock the second boom; a second boom cylinder (36) mounted on the second boom and the first boom to rock the second boom; and an arm cylinder (37) mounted on the second boom and the arm to rock the arm. The working tool unit is adapted to switch over its position from an attitude for storage to an attitude for working by rocking the first boom (31a) with extension and contraction of the first boom cylinder (35) and the second boom cylinder (36).

대표청구항 ▼

A working tool unit suitable for being mounted on a turning frame of a construction vehicle so that said working tool unit has a storage attitude and a working attitude, said working tool unit comprising: a first boom adapted to be rockably mounted on said turning frame; a second boom rockably mount

A working tool unit suitable for being mounted on a turning frame of a construction vehicle so that said working tool unit has a storage attitude and a working attitude, said working tool unit comprising: a first boom adapted to be rockably mounted on said turning frame; a second boom rockably mounted on said first boom; an arm rockably mounted on said second boom; a working tool mounted on said arm; a first boom cylinder adapted to be mounted between said turning frame and said second boom to rock said second boom with respect to said turning frame; a second boom cylinder mounted between said second boom and said first boom to rock said second boom with respect to said first boom; an arm cylinder mounted between said second boom and said arm to rock the arm; a boom support pin for rockably connecting said first boom and said turning frame, a first pin rockably connecting said first boom and said second boom, a second pin rockably connecting said second boom and a first end of said first boom cylinder, a third pin rockably connecting a first end of said second boom cylinder to said second boom; and a fourth pin for rockably connecting a second end of said first boom cylinder and said turning frame; wherein said second pin is located above a first line between said boom support pin and said first pin while said working tool unit is in said storage attitude, and wherein said boom support pin is positioned on or below a second line between said fourth pin and said second pin while said working tool unit is in said storage attitude.