Kabushiki Kaisha Toyota Jidoshokki

Nishina Industrial Co., Ltd.

Nishia Industrial Co., Ltd.

Yukinori Takeda

Shigeto Nakajima

Yuki Ueda

Tetsuya Goto

Junichi Morita

Koichi Kinoshita

Koshiro Saji

Tsuyoshi Kanazawa

This power steering valve () includes a sleeve (), a spool () held in such a way as to be able to rotate within the housing (), to which an input shaft U of a steering wheel S is coupled, a gerotor () fixed to the sleeve () and configured to be driven by hydraulic fluid which flows out from the predetermined opening of the sleeve (), and a drive shaft () meshing with an inner rotor () of the gerotor () and pivotally supported in a swingable manner by the sleeve () with use of a pin (), wherein an overall length Ld of the drive shaft () is formed to have a dimension defined by (¼)·Ls≤Ld≤(½)·Ls relative to an overall length Ls of the sleeve (), and the pin () is arranged at a position nearer the gerotor () in an axial direction than a middle position in the sleeve ().

Power steering valve

A hydraulic driving device of an industrial vehicle includes: a tank which stores hydraulic oil; a hydraulic pump which includes a suction port sucking the hydraulic oil and a discharge port discharging the hydraulic oil; a hydraulic cylinder which is driven by the hydraulic oil discharged from the discharge port of the hydraulic pump; a direction switching valve which is disposed among the hydraulic pump, the tank, and the hydraulic cylinder and switches a hydraulic oil flow direction in response to an operation state of operation means for driving the hydraulic cylinder; in which the direction switching valve includes a main spool which moves in response to the operation state of the operation means and a flow regulator which is disposed inside the main spool to control a flow rate of the hydraulic oil flowing from the hydraulic cylinder to the tank.

Hydraulic driving device of industrial vehicle

An industrial vehicle includes a hydraulic brake device, a hydraulic load handling device, a first hydraulic circuit, a second hydraulic circuit, a pressure compensating circuit, and a controller. The controller sets an electromagnetic valve to a first position during operation of the load handling device. The controller sets the electromagnetic valve to a second position and controls an electric motor to drive a hydraulic pump when determining that pressure needs to be accumulated in a hydraulic accumulator based on a detection result of a detector. When the electromagnetic valve is at the second position, hydraulic pressure generated by driving the hydraulic pump is applied to a pressure compensating valve and produces a force acting in a direction to disconnect the hydraulic pump and an oil tank from each other, so that hydraulic pressure is generated in a first oil passage to be accumulated in the hydraulic accumulator.

Industrial vehicle

Growing community of inventors

Nagano, Japan

Yukinori Takeda