Control Lever Device for Construction Machine

Patent metadata

Field	Value
Publication number	US-2018282971-A1
Application number	US-201815914779-A
Country	US
Kind code	A1
Filing date	Mar 7, 2018
Priority date	Mar 29, 2017
Publication date	Oct 4, 2018
Grant date	—

Abstract

A lock mechanism is provided in front of each of left and right consoles to fix the console in an optional position. Each of the lock mechanisms is provided with a lock release lever for selecting a lock state of fixing the console and a lock release state of releasing fixation of the console. Each of the lock release levers is provided to extend outward in a left-right direction from the lock mechanism. The lock state is defined by an inclined posture in which a tip end side of the lock release lever is in an oblique downward direction and the lock release state is defined by a horizontal posture in which the tip end sides of the lock release lever is rotated in an upward direction. A hand hold part is provided in front of each of the consoles and above each of the lock release levers to swing the console in the upper-lower direction in the lock release state.

First claim

1 . A control lever device for a construction machine comprising:
left and right consoles that are arranged on both left and right sides of an operator's seat and a front side of which can swing in an upper-lower direction about a rear side as a fulcrum attached on a fixed frame; control levers that are provided on said left and right consoles to control a front device; and urging members that urge said respective consoles configuring said left and right consoles such that the front sides of said left and right consoles swing upward, wherein a lock mechanism is provided in front of each of said consoles to fix said console in an optional position; a lock release lever is provided on each of said lock mechanisms to select a lock state of fixing said console and a lock release state of releasing the fixation of said console, said lock release lever being provided to extend outward in a left-right direction to said operator's seat from said lock mechanism, said lock state being defined by an inclined posture in which a tip end side of said lock release lever is in an oblique downward direction and said lock release state being defined by a horizontal posture in which said lock release lever is rotated in an upward direction from said inclined posture; and a hand hold part is provided in front of each of said consoles and above each of said lock release levers to cause said console to swing in the upper-lower direction in said lock release state in which the fixation of said console is released by said lock release lever.

2 . The control lever device for the construction machine according to claim 1 , wherein
a plurality of engaging holes are provided in the front side of said fixed frame at both left and right sides to be spaced in the upper-lower direction, said lock mechanisms each include: a lock pin that is pulled into/from one engaging hole of said plurality of engaging holes by performing a linear movement in the axial direction; a spring member that urges said lock pin toward said engaging hole; a rotating shaft that projects from a front surface of said console to a front side in the front-rear direction and is provided with said lock release lever on a tip end position thereof; and a convert member that coverts a rotating movement of said rotating shaft by said lock release lever into the linear movement of said lock pin, wherein in said lock state, said lock pin is inserted in one engaging hole of said plurality of engaging holes, and in said lock release state, said lock pin is disengaged from said one engaging hole to release the fixation.

3 . The control lever device for the construction machine according to claim 2 , wherein
said fixed frame includes a left base frame and a right base frame that are arranged to be spaced from each other in the left-right direction, console support brackets having said fulcrum are arranged in the rear side of said left base frame and said right base frame respectively, and front vertical plates having said plurality of engaging holes are provided in the front side of said left base frame and said right base frame, respectively.

4 . The control lever device for the construction machine according to claim 3 , wherein
guide mechanisms each are provided between said console and said front vertical plate to guide said console along said front vertical plate when said console is caused to swing, and said guide mechanisms each include: an arc-shaped guide groove that is provided in said front vertical plate and extends in the upper-lower direction at the center of said fulcrum of said console support bracket; a screw hole that is provided to correspond to said guide groove on an inner surface part of said console facing said front vertical plate; and a guide bolt that is inserted in said guide groove to be screwed into said screw hole.

Assignees

• Hitachi Construction Mach Co

Inventors

• Yuan Guoliang
• Isaka Wataru

Classifications

• G05G1/04

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

• E02F9/24

  Safety devices {, e.g. for preventing overload (E02F9/226 takes precedence)} · CPC title

• E02F9/16

  Cabins, platforms, or the like, for drivers ({for motor vehicles in general B62D33/06}, for cranes B66C13/54) · CPC title

• B60N2/77

  Height adjustment · CPC title

• E02F9/20

  Drives; Control devices (gearings in general F16H; controlling in general G05; electric multi-motor drives H02K, H02P) · CPC title