公开(公告)号：US20240376988A1

公开(公告)日：2024-11-14

申请号：US18690369

申请日：2022-09-13

Applicant: KYB Corporation

Inventor： Shunsuke FUKUDA ,  Ryo FUKUSHIMA

IPC: F16K11/07

Abstract: A valve device includes: a main spool including supply passages and a supply-side land portion; and a valve block including an outflow passage, in which the supply passage allows a supply port to communicate with the outflow passage in a process of the main spool moving from a neutral position toward one stroke end in an axial direction, and the supply passage allows a supply port to communicate with the outflow passage in a process of the main spool moving from the neutral position toward the other stroke end in the axial direction, and the supply passage allows the supply port to communicate with the outflow passage in the process of the main spool moving toward the one stroke end and allows the supply port to communicate with the outflow passage in the process of the main spool moving toward the other stroke end.

公开(公告)号：US20200157771A1

公开(公告)日：2020-05-21

申请号：US16633332

申请日：2019-02-27

Applicant: KYB Corporation

Inventor： Keiichi MATSUZAKI ,  Shunsuke FUKUDA

IPC: E02F9/22

Abstract: A fluid pressure control device includes a first switching valve provided on a downstream of a first travel control valve in the first main passage and having an open position and a priority position, a second switching valve provided on a downstream of a second travel control valve in the second main passage and having an open position and a priority position, and a merging passage connecting a downstream of the first switching valve and a downstream of the second switching valve. In a state where first work control valves and second work control valves are not operated and the first travel control valve is operated, the first switching valve is at a priority position, and in a state where the first work control valves and the second work control valves are not operated and the second travel control valves is operated, the second switching valve is at a priority position.

公开(公告)号：US20170074292A1

公开(公告)日：2017-03-16

申请号：US15120773

申请日：2014-12-16

Applicant: KYB CORPORATION

Inventor： Shunsuke FUKUDA ,  Nobuyoshi YOSHIDA

IPC: F15B11/17 ,  F16K15/02 ,  F16K31/122 ,  E02F9/22 ,  F16K11/07

CPC classification number: F15B11/17 ,  E02F9/2228 ,  E02F9/2239 ,  E02F9/2253 ,  E02F9/2267 ,  E02F9/2282 ,  E02F9/2285 ,  E02F9/2292 ,  F15B11/02 ,  F16K11/0716 ,  F16K15/02 ,  F16K31/1221

Abstract: A fluid pressure control device for a construction machine includes a first circuit system connected to the first pump; a second circuit system connected to the second pump; a switching valve having a normal position, a straight traveling position and a merging position where the working fluid of the branch section is merged into the second neutral passage; and an open/close mechanism configured to open/close the first neutral passage. In a case where at least one of the control valves, on which merging is required, on the downstream of the second traveling control valve is switched to a position other than the neutral position, by closing the first neutral passage by the open/close mechanism and switching the switching valve to the merging position, the working fluid of the first pump is merged into the working fluid of the second pump.

Abstract translation: 一种用于建筑机械的流体压力控制装置，包括连接到第一泵的第一回路系统; 连接到第二泵的第二电路系统; 切换阀，其具有正常位置，直线行进位置和合流位置，其中分支部分的工作流体合并到第二中立通道中; 以及构造成打开/关闭第一中立通道的打开/关闭机构。 在需要合流的控制阀中的至少一个在第二行驶控制阀的下游切换到除了中立位置之外的位置的情况下，通过打开/关闭机构关闭第一中立通道 并且将切换阀切换到合流位置，第一泵的工作流体被合并到第二泵的工作流体中。