公开(公告)号：US11293169B2

公开(公告)日：2022-04-05

申请号：US16493410

申请日：2018-09-19

Applicant: HITACHI CONSTRUCTION MACHINERY CO., LTD.

Inventor： Tomohiro Ueda ,  Masaki Yoshikawa ,  Takashi Ishii ,  Takayoshi Murahashi ,  Masakazu Kaitou ,  Koji Shimazaki ,  Isamu Aoki

IPC: E02F9/26 ,  E02F3/28 ,  G01G19/10 ,  G01G19/16 ,  G07C5/02

Abstract: In an unloaded state of the bucket (3), a control device (30) calculates an unloaded moment (M0) around a hinge pin G from the pressure of the lift arm cylinder that is detected by pressure sensors (15a, 15b), the angle of a lift arm that is detected by a lift arm angle sensor 14, and dimension data extracted from a vehicle body information database (35). In a loaded state of the bucket, the control device calculates a loaded moment (M1) around the hinge pin G from the pressure of the lift arm cylinder, the angle of the lift arm, and the dimension data extracted from the vehicle body information database. The control device calculates the load (W) on the bucket by dividing the difference between the unloaded moment and the loaded moment by the horizontal distance (Lw) between the hinge pin and the gravity center position of the bucket.