公开(公告)号：US20220225556A1

公开(公告)日：2022-07-21

申请号：US17614066

申请日：2020-05-29

Applicant: KUBOTA CORPORATION

Inventor： Daisuke NAKAYAMA ,  Hironobu NOGAMI ,  Norihide IWATA ,  Katsumi YANAGIHARA ,  Naoto MANTOKU ,  Keita ONO

IPC: A01B63/114 ,  A01B63/112

Abstract: A tractor includes: a three-point linkage to which a tiller is mountable a hydraulic lifting/lowering driver to lift and lower the three-point linkage, and a mechanical linkage to transmit a lifting/lowering operation amount of the three-point linkage to the lifting/lowering driver. The mechanical linkage includes a load detector to detect an amount of change in traction load via the three-point linkage, a cable to interlock according to the amount of change in the traction load detected by the load detector, and a mechanical linkage interlocked and connected to the cable and the lifting/lowering driver, the mechanical linkage being capable of transmitting the lifting/lowering operation amount according to the amount of change in the traction load to the lifting/lowering driver.