Operation lever and construction machine

Patent metadata

Field	Value
Publication number	US-2025163677-A1
Application number	US-202418950079-A
Country	US
Kind code	A1
Filing date	Nov 16, 2024
Priority date	Nov 17, 2023
Publication date	May 22, 2025
Grant date	—

Abstract

An operation lever of a construction machine is constituted by integrally connecting a boom operation portion capable of operating a rotational-movement operation of a boom with respect to a machine body, an arm operation portion capable of operating the rotational-movement operation of an arm with respect to the boom, an attachment operation portion capable of operating an operation of an attachment, and a swing operation portion capable of operating a swing operation of the boom with respect to the machine body.

First claim

1 . An operation lever for a construction machine, characterized by integrally connecting:
a boom operation portion capable of operating a rotational-movement operation of a boom with respect to a machine body; an arm operation portion capable of operating a rotational-movement operation of an arm with respect to the boom; an attachment operation portion capable of operating an operation of an attachment; and a swing operation portion capable of operating a swing operation of the boom with respect to the machine body.

2 . The operation lever according to claim 1 , wherein the attachment operation portion is constituted capable of operating a rotational-movement operation of the attachment with respect to the arm.

3 . The operation lever according to claim 2 , wherein the boom operation portion is constituted operably in a first operation direction corresponding to a rotational movement direction of the boom;
the arm operation portion is constituted operably in a second operation direction corresponding to a rotational movement direction of the arm; the attachment operation portion is constituted operably in a third operation direction corresponding to a rotational movement direction of the attachment; and the swing operation portion is constituted operably in a fourth operation direction corresponding to a swing direction of the boom.

4 . The operation lever according to claim 3 , wherein the first operation direction of the boom operation portion, the second operation direction of the arm operation portion, and the third operation direction of the attachment operation portion are set to different directions, respectively.

5 . The operation lever according to claim 1 , further comprising a swing lock portion capable of locking an operation of a swing operation of the boom by the swing operation portion.

6 . The operation lever according to claim 1 , further comprising an electromagnetic-load device capable of adjusting an operation load of at least one of the boom operation portion, the arm operation portion, the attachment operation portion, and the swing operation portion.

7 . The operation lever according to claim 1 , wherein the swing operation portion, the boom operation portion, the arm operation portion, and the attachment operation portion are disposed in this order from a base portion to a distal end of the operation lever.

8 . The operation lever according to claim 3 , wherein the swing operation portion is constituted rotatably in a right-left direction with respect to a base portion of the operation lever;
the boom operation portion is constituted slidably with respect to the swing operation portion in a sliding direction in a front-rear direction as the first operation direction; the arm operation portion is constituted rotatably with respect to the boom operation portion in a rotation direction in the front-rear direction as the second operation direction, and the attachment operation portion is constituted slidably with respect to the arm operation portion in a sliding direction in the front-rear direction as the third operation direction.

9 . The operation lever according to claim 3 , wherein the boom operation portion is formed to extend upward from a base portion of the operation lever and is constituted rotatably around a rotation shaft provided in the base portion with a rotation direction in a front-rear direction as the first operation direction;
the arm operation portion is formed to extend downward from a distal end of the boom operation portion and is constituted rotatably around a rotation shaft provided at the distal end of the boom operation portion with a rotation direction in the front-rear direction as the second operation direction; and the attachment operation portion is formed in an ellipsoidal shape and is constituted rotatably around a rotation shaft provided at a distal end of the arm operation portion with a rotation direction in an up-down direction as the third operation direction.

10 . A construction machine characterized by comprising the operation lever according to claim 1 .

Assignees

• Yanmar Holdings Co Ltd

Inventors

• Okamatsu Taro
• Yoshioka Naohito
• Araki Nobuyuki
• Kimura Tomohiro
• Shu Yuzhuo

Classifications

• G05G1/04

  Controlling members for hand actuation by pivoting movement, e.g. levers · CPC title

• E02F3/964

  of several tools mounted on one machine (E02F3/962 takes precedence) · CPC title

• E02F3/325

  Backhoes of the miniature type · CPC title

• E02F9/2004 Primary

  Control mechanisms, e.g. control levers (control levers per se G05G) · CPC title