公开(公告)号：US20160258135A1

公开(公告)日：2016-09-08

申请号：US14409209

申请日：2014-09-10

Applicant: KOMATSU LTD.

Inventor： Yuki SHIMANO ,  Yuto FUJII ,  Takeshi TAKAURA

IPC: E02F9/26 ,  E02F3/43 ,  E02F9/20

CPC classification number: E02F9/265 ,  E02F3/32 ,  E02F3/435 ,  E02F9/2029 ,  E02F9/2221 ,  E02F9/262

Abstract: A stop control unit carries out control, when a moving speed of a bucket in a direction toward target design topography is the same in both of a first specifying state in which a bucket weight specifying portion specifies a weight of the bucket as large and a second specifying state in which the bucket weight specifying portion specifies a weight of the bucket as small, such that the moving speed of the bucket in the direction toward the target design topography is reduced from a position more distant from the target design topography in the first specifying state than in the second specifying state.

Abstract translation: 当铲斗重量指定部指定铲斗重量大的第一指定状态和铲斗重量指定部分指定铲斗重量的第二指定状态和铲斗重量指定部分指定铲斗重量的第二指定状态时，停止控制单元执行在朝向目标设计地形的方向上的铲斗的移动速度相同的控制 指定铲斗重量指定部指定铲斗的重量的小的状态，使得在朝向目标设计地形的方向上的铲斗的移动速度从第一指定中的距离目标设计地形更远的位置减小 状态比第二指定状态。

公开(公告)号：US20160069044A1

公开(公告)日：2016-03-10

申请号：US14423452

申请日：2014-09-10

Applicant: KOMATSU LTD.

Inventor： Takeshi TAKAURA ,  Yuto FUJII ,  Yoshiki KAMI

IPC: E02F9/20 ,  E02F9/22

CPC classification number: E02F9/2012 ,  E02F3/437 ,  E02F9/2004 ,  E02F9/2029 ,  E02F9/2246 ,  E02F9/226 ,  E02F9/265

Abstract: A work vehicle includes a boom, an arm, a bucket, an arm cylinder, a direction control valve, a calculation portion, and a speed determination portion. The calculation portion calculates an estimated speed of the arm cylinder based on correlation between an amount of movement of the spool of the direction control valve in accordance with an amount of operation of an arm control lever and a speed of the arm cylinder. The speed determination portion determines a target speed of the boom based on the estimated speed of the arm cylinder. When the amount of operation of the arm control lever is smaller than a prescribed amount, the calculation portion calculates a speed higher than a speed of the arm cylinder in accordance with correlation as the estimated speed of the arm cylinder.

Abstract translation: 工作车辆包括吊杆，臂，铲斗，斗杆缸，方向控制阀，计算部分和速度确定部分。 计算部根据臂控制杆的动作量与斗杆缸的转速的关系，算出方向控制阀的阀芯的移动量之间的相关关系来计算斗杆缸的推定速度。 速度确定部分基于臂缸的估计速度来确定起重臂的目标速度。 当臂控制杆的操作量小于规定量时，计算部根据与手臂缸的推定速度的相关关系来计算高于手臂缸的速度的速度。

公开(公告)号：US20160145827A1

公开(公告)日：2016-05-26

申请号：US14419542

申请日：2014-09-10

Applicant: KOMATSU LTD.

Inventor： Yoshiki KAMI ,  Takeo YAMADA ,  Yuto FUJII ,  Takeshi TAKAURA

IPC: E02F3/43 ,  E02F3/30

CPC classification number: E02F3/435 ,  E02F3/30 ,  E02F3/437 ,  E02F9/262 ,  E02F9/265 ,  G05B19/416 ,  G05B2219/40043 ,  G05B2219/43203 ,  G05B2219/45012

Abstract: A work vehicle includes a boom, an arm, a bucket, an arm control member, a speed limit determination portion, and a target speed determination portion. The speed limit determination portion determines a speed limit for limiting a speed of a cutting edge of the bucket in accordance with a distance between a cutting edge and a design surface. The target speed determination portion determines a target speed of the boom based on the speed limit. The speed limit determination portion decides on a speed limit calculated based on correlation between the speed limit and the distance between the design surface and the cutting edge when an amount of operation of the arm control member is equal to or greater than a prescribed amount and decides on a speed limit lower than the speed limit calculated based on the correlation when the amount of operation is smaller than the prescribed amount.

Abstract translation: 工作车辆包括吊杆，臂，铲斗，臂控制构件，限速确定部和目标速度确定部。 速度限制判定部根据切削刃和设计面之间的距离，决定限制铲斗的切削刃速度的速度限制。 目标速度确定部分基于速度限制来确定起重臂的目标速度。 速度限制判断部判定在臂控制部件的动作量为规定量以上的情况下，基于速度限制与设计面与切削刃之间的距离的关系而计算出的速度限制，并且决定 在比操作量小于规定量时基于相关性计算的速度限制的速度限制。

公开(公告)号：US20160273193A1

公开(公告)日：2016-09-22

申请号：US14410832

申请日：2014-09-05

Applicant: KOMATSU LTD.

Inventor： Toru MATSUYAMA ,  Takeshi TAKAURA

IPC: E02F9/22 ,  E02F9/26 ,  E02F3/43 ,  E02F3/32

CPC classification number: E02F9/2228 ,  E02F3/32 ,  E02F3/435 ,  E02F3/437 ,  E02F9/2207 ,  E02F9/2267 ,  E02F9/2285 ,  E02F9/2292 ,  E02F9/262 ,  E02F9/265

Abstract: There is provided a hydraulic excavator in which the highly-accurate land leveling work is possible. A boom-lowering pilot conduit connected to a boom-lowering pilot port is provided with a boom-lowering proportional solenoid valve. When an arm dump signal for performing dump operation of an arm is included in a hydraulic pressure signal, a controller sharply increases a current value outputted to the boom-lowering proportional solenoid valve, as compared with when an arm excavation signal for performing excavation operation of the arm is included in the hydraulic pressure signal.

Abstract translation: 提供了一种液压挖掘机，其中可以进行高精度的土地平整工作。 连接到动臂下降先导口的动臂降低先导管设置有动臂下降比例电磁阀。 当在液压信号中包括用于执行臂的倾卸操作的斗杆转向信号时，与用于执行挖掘操作的臂挖掘信号相比，控制器大大增加输出到动臂下降比例电磁阀的电流值 手臂被包含在液压信号中。

公开(公告)号：US20160069040A1

公开(公告)日：2016-03-10

申请号：US14419507

申请日：2014-09-10

Applicant: KOMATSU LTD.

Inventor： Yoshiki KAMI ,  Takeo YAMADA ,  Toru MATSUYAMA ,  Yuto FUJII ,  Takeshi TAKAURA

IPC: E02F3/43 ,  E02F9/22 ,  E02F9/26 ,  E02F3/32

CPC classification number: E02F3/435 ,  E02F3/32 ,  E02F3/437 ,  E02F9/2207 ,  E02F9/262 ,  E02F9/265

Abstract: A work vehicle includes a speed limit calculation portion, a speed determination portion, an adjustment portion, and a boom speed determination portion. The speed limit calculation portion calculates a speed limit for limiting a speed of a cutting edge of a bucket. The speed determination portion determines whether or not a speed of raising the boom has been lowered when an amount of operation of an arm is smaller than a prescribed amount. The adjustment portion delays speed change to the speed limit. The boom speed determination portion determines a target speed of the boom based on the speed limit after delay by the adjustment portion when it is determined that the speed of raising the boom has been lowered, and determines a target speed of the boom based on the speed limit calculated when it is not determined that the speed of raising the boom has been lowered.

Abstract translation: 工作车辆包括速度限制计算部分，速度确定部分，调节部分和动臂速度确定部分。 速度限制计算部分计算用于限制铲斗的切割刃的速度的速度限制。 当臂的操作量小于规定量时，速度确定部分确定升降臂的升高速度是否已经降低。 调整部分将速度变化延迟到速度限制。 当确定悬臂的升高速度已经降低时，起重臂速度确定部分基于调节部分的延迟之后的速度限制来确定起重臂的目标速度，并且基于速度确定起重臂的目标速度 当没有确定提升吊杆的速度已经降低时计算出的极限。