公开(公告)号：US10890252B2

公开(公告)日：2021-01-12

申请号：US16560214

申请日：2019-09-04

申请人： Kanzaki Kokyukoki Mfg. Co., Ltd.

发明人： Jun Matsuura ,  Nobuhisa Kamikawa

IPC分类号： F16H61/4069 ,  F04B1/00 ,  F04B1/146 ,  F04B1/182

摘要： A control mechanism for a hydrostatic transmission includes a piston rod, a neutral biasing spring, a piston, a cylinder case provided with a first fluid chamber and a second fluid chamber, a solenoid valve capable of selectively supplying pressurized fluid to the first fluid chamber and the second fluid chamber, a pivot shaft configured to swingably support the cylinder case, and a first relief valve configured to flow the hydraulic fluid from the first fluid chamber to the second fluid chamber when a hydraulic pressure in the first fluid chamber exceeds a set pressure, and a second relief valve configured to flow the hydraulic fluid from the second fluid chamber to the first fluid chamber when a hydraulic pressure in the second fluid chamber exceeds a set pressure.

公开(公告)号：US10794480B2

公开(公告)日：2020-10-06

申请号：US15920167

申请日：2018-03-13

申请人： Kanzaki Kokyukoki Mfg. Co., Ltd.

发明人： Jun Matsuura ,  Nobuhisa Kamikawa ,  Syouto Yoshimoto ,  Koji Iwaki ,  Masaru Iida ,  Toshifumi Yasuda

IPC分类号： F16H61/433 ,  F15B15/06 ,  F15B15/14 ,  F16H39/14 ,  F04B1/324 ,  F04B49/22 ,  F16K11/07 ,  F04B1/20 ,  F03C1/06 ,  F04B23/10 ,  F04B49/08 ,  F04B49/00 ,  F16K31/06

摘要： A control mechanism for a stepless transmission is a control mechanism connected to a manipulation lever in a stepless transmission and disposed outside a housing of the transmission. The control mechanism includes: a) a piston rod connected to the manipulation lever; b) a piston provided on the piston rod coaxially with the piston rod; c) a cylinder case provided with a cylinder adapted to house the piston rod and the piston such that the piston rod and the piston are displaceable in an axial direction, the piston and the cylinder forming a first fluid chamber to be supplied with a hydraulic fluid for withdrawing the piston rod from the cylinder and a second fluid chamber to be supplied with the hydraulic fluid for introducing the piston rod into the cylinder; d) a spring adapted to bias the manipulation lever in a neutral direction coaxially with the piston rod; e) a proportional pressure control valve adapted to selectively supply the hydraulic fluid to the first fluid chamber or the second fluid chamber, the proportional pressure control valves being mounted to the cylinder case; and f) a pivot shaft adapted to support the cylinder case oscillatably with respect to the housing.