US 12,454,805 B2
Work machine
Masaho Yamaguchi, Tokyo (JP)
Assigned to KOMATSU LTD., Tokyo (JP)
Appl. No. 18/274,302
Filed by KOMATSU LTD., Tokyo (JP)
PCT Filed Jan. 17, 2022, PCT No. PCT/JP2022/001380
§ 371(c)(1), (2) Date Jul. 26, 2023,
PCT Pub. No. WO2022/168582, PCT Pub. Date Aug. 11, 2022.
Claims priority of application No. 2021-016061 (JP), filed on Feb. 3, 2021.
Prior Publication US 2024/0084546 A1, Mar. 14, 2024
Int. Cl. E02F 3/42 (2006.01); E02F 9/22 (2006.01)
CPC E02F 3/427 (2013.01) [E02F 3/425 (2013.01); E02F 9/2296 (2013.01)] 11 Claims
OG exemplary drawing
 
1. A work machine comprising:
a vehicular body frame;
a work implement including a boom supported by the vehicular body frame, an arm coupled to the boom, and an attachment coupled to the arm;
a boom foot pin that rotatably couples the boom to the vehicular body frame;
an electric motor supported by the vehicular body frame, the motor generating drive force that moves the arm relatively to the boom; and
a motive power transmission apparatus that mechanically transmits drive force generated by the motor to the arm, wherein
the motive power transmission apparatus includes:
a first transmission member that carries out rotational motion relative to the vehicular body frame as being concentric with the boom foot pin, and
a second transmission member that transmits motive power to the arm as a result of the relative rotational motion of the first transmission member, wherein
the second transmission member includes:
an intermediate member connected to the boom,
a rod-shaped first link member extending along an outer side of the boom and coupled to the intermediate member, the first rod-shaped link member transmitting drive force to the intermediate member, and
a rod-shaped second link member extending along the outer side of the boom and coupling the intermediate member and the arm to each other.