公开(公告)号：US08931572B2

公开(公告)日：2015-01-13

申请号：US14131700

申请日：2013-06-12

Applicant: Komatsu Ltd.

Inventor： Kazushi Nakata ,  Shigeru Yamamoto

IPC: E02F9/22 ,  E02F3/84 ,  E02F3/76

CPC classification number: E02F3/844 ,  E02F3/7613 ,  E02F3/7618 ,  E02F3/847

Abstract: A work machine includes a vehicle body, a blade supported by the vehicle body, a pair of first hydraulic cylinders, a pair of second hydraulic cylinders, a pair of lift stroke sensors and a control unit. The first hydraulic cylinders are configured to lower and raise the blade. The second hydraulic cylinders are configured to tilt the blade forward and backward and left and right. The lift stroke sensors are configured to detect stroke amounts from the pair of first hydraulic cylinders, respectively. The control unit is configured to start actuating the pair of second hydraulic cylinders when the stroke amounts of the pair of first hydraulic cylinders match. The control unit is configured to stop actuating the pair of second hydraulic cylinders based on a magnitude relation between a prescribed threshold and a difference in the stroke amounts of the pair of first hydraulic cylinders.

Abstract translation: 工作机械包括车身，由车身支撑的叶片，一对第一液压缸，一对第二液压缸，一对提升行程传感器和控制单元。 第一液压缸构造成降低和升高叶片。 第二液压缸被构造成向前和向后以及左右倾斜叶片。 提升行程传感器被配置为分别检测来自该对第一液压缸的冲程量。 控制单元构造成当一对第一液压缸的冲程量相匹配时开始致动该对第二液压缸。 控制单元被构造成基于规定的阈值与一对第一液压缸的行程量的差异之间的大小关系来停止致动该对第二液压缸。

公开(公告)号：US12276079B2

公开(公告)日：2025-04-15

申请号：US18710308

申请日：2022-12-27

Applicant: KOMATSU LTD.

Inventor： Takeshi Yoshikawa ,  Hiroaki Takeshima ,  Naoya Akiyama ,  Shinichi Otaka ,  Kazushi Nakata ,  Osamu Yatsuda

IPC: E02F3/04 ,  E02F3/84 ,  E02F9/02 ,  E02F9/20 ,  E02F9/22 ,  F15B13/06 ,  F15B15/18 ,  E02F3/76

Abstract: A crawler-type work machine includes left and right steering brakes configured to brake left and right output shafts, a turning motor configured to produce a rotation speed difference between the left and right output shafts, work implement cylinders configured to drive a work implement attached to a vehicle body, a hydraulic pressure supply unit configured to supply hydraulic fluid to the turning motor and the work implement cylinders, and a controller configured to control the hydraulic pressure supply unit. The controller is configured to execute a hydraulic fluid amount control in order to reduce the hydraulic fluid amount supplied from the hydraulic pressure supply unit to the turning motor when the work implement cylinders are driven while the turning motor is rotating.

公开(公告)号：US09051709B1

公开(公告)日：2015-06-09

申请号：US14351913

申请日：2014-02-21

Applicant: KOMATSU LTD.

Inventor： Kazushi Nakata ,  Yuuichirou Kitagawa ,  Mitsutaka Nakamura

IPC: B62D25/10 ,  E02F9/08

CPC classification number: E02F9/0866 ,  B60K11/02 ,  B60Y2200/411 ,  B62D25/10 ,  E02F3/7618 ,  E02F9/0883 ,  E02F9/0891

Abstract: A bulldozer is equipped with an engine, a radiator, a reservoir tank, and an engine hood. The reservoir tank is connected to the radiator. The engine hood has a body section and a case section. The body section defines an upper section of the engine room. The case section is disposed on an inside surface of the body section and accommodates the reservoir tank.

Abstract translation: 推土机配有发动机，散热器，储油箱和发动机罩。 储罐与散热器相连。 发动机罩具有主体部分和壳体部分。 主体部分定义了发动机室的上部。 壳体部分设置在主体部分的内表面上并且容纳储存罐。

公开(公告)号：US20140345889A1

公开(公告)日：2014-11-27

申请号：US14131700

申请日：2013-06-12

Applicant: KOMATSU LTD.

Inventor： Kazushi Nakata ,  Shigeru Yamamoto

IPC: E02F3/84 ,  E02F3/76

CPC classification number: E02F3/844 ,  E02F3/7613 ,  E02F3/7618 ,  E02F3/847

Abstract: A work machine includes a vehicle body, a blade supported by the vehicle body, a pair of first hydraulic air of second hydraulic cylinders, a pair of lift stroke sensors and a control unit. The first hydraulic cylinders are configured to lower and raise the blade. The second hydraulic cylinders are configured to tilt the blade forward and backward and left and right. The lift stroke sensors are configured to detect stroke amounts from the pair of first hydraulic cylinders, respectively. The control unit is configured to start actuating the pair of second hydraulic cylinders when the stroke amounts of the pair of first hydraulic cylinders match. The control unit is configured to stop actuating the pair of second hydraulic cylinders based on a magnitude relation between a prescribed threshold and a difference in the stroke amounts of the pair of first hydraulic cylinders.

Abstract translation: 工作机械包括车体，由车身支撑的叶片，第二液压缸的一对第一液压空气，一对提升行程传感器和控制单元。 第一液压缸构造成降低和升高叶片。 第二液压缸被构造成向前和向后以及左右倾斜叶片。 提升行程传感器被配置为分别检测来自该对第一液压缸的冲程量。 控制单元构造成当一对第一液压缸的冲程量相匹配时开始致动该对第二液压缸。 控制单元被构造成基于规定的阈值与一对第一液压缸的行程量的差异之间的大小关系来停止致动该对第二液压缸。