公开(公告)号：US20240308816A1

公开(公告)日：2024-09-19

申请号：US18120442

申请日：2023-03-13

Applicant: YIDE PAN

Inventor： YIDE PAN

IPC: B66C13/23 ,  B66C19/00 ,  H02G3/08

CPC classification number: B66C13/23 ,  B66C19/00 ,  H02G3/08

Abstract: An electric crane contains: a body and an electrical box. The body includes a drive device, a roller, a lift assembly, and a hanging assembly. The electrical box is electrically connected with an operation lever configured to be manually controlled by a user, and the operation lever has multiple switches. The drive device is a permanent magnet servo motor and has an encoder. The electrical box includes a control unit electrically connected with the encoder to feed back a detected position of a rotator of the permanent magnet servo motor and to compare whether an operating instruction of the permanent magnet servo motor matches with a rotating speed of the permanent magnet servo motor. The operation lever has a rotary hand wheel. The operation lever has a pulse signal generator. The pulse signal generator is electrically connected with the electrical box.