HYDRAULIC CYLINDER DEVICE

PROBLEM TO BE SOLVED: To provide a technology having high accuracy and versatility while being simple in structure by attaching, in particular, a rod position detection device having a permanent magnet, a lead switch or the like to the outside of a cylinder main body, in a hydraulic cylinder device...

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Bibliographic Details
Main Authors AKASAKA TAKEYOSHI, ARAI TAKATOMO, MAEDA MUNEKAZU
Format Patent
LanguageEnglish
Japanese
Published 26.01.2017
Subjects
BLASTING
DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
FLUID-PRESSURE ACTUATORS
FLUID-PRESSURE ACTUATORS, e.g. SERVO-MOTORS
HEATING
HYDRAULICS OR PNEUMATICS IN GENERAL
LIGHTING
MECHANICAL ENGINEERING
SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL
WEAPONS
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Summary:PROBLEM TO BE SOLVED: To provide a technology having high accuracy and versatility while being simple in structure by attaching, in particular, a rod position detection device having a permanent magnet, a lead switch or the like to the outside of a cylinder main body, in a hydraulic cylinder device having the rod position detection device.SOLUTION: A rod position detection device 3 of a hydraulic cylinder device 1 comprises: a position detection rod 4; an annular permanent magnet 5 which is fixed to an external periphery of the other end 42 of the position detection rod 4; a cylindrical cover 6 which is composed of a non-magnetic material; and a lead switch 7 which is fixed to an external periphery of the cylindrical cover 6 so as to be adjustable in position. One end of the position detection rod is connected to a piston-side end part 25b of a piston rod 25 while penetrating a second rod bush 23. The cylindrical cover 6 is formed into a prescribed length at which the position detection rod fixed with the permanent magnet 5 can reciprocate in the cylindrical cover 6, covers the position detection rod 4 which is fixed with the permanent magnet 5, and is attached to a cylinder main body 2.SELECTED DRAWING: Figure 3 【課題】ロッド位置検出装置を備えた液圧シリンダ装置に係り、特に、永久磁石、リードスイッチ等を備えたロッド位置検出装置を、シリンダ本体の外方に取付けるようにして、簡単な構造でありながら、精度の高い汎用性をもたせた技術である。【解決手段】液圧シリンダ装置１のロッド位置検出装置３は、位置検出ロッド４と、位置検出ロッド４の他端４２外周に固定した円環状の永久磁石５と、非磁性材料からなる円筒状カバー６と、円筒状カバー６の外周に位置調節可能に固定したリードスイッチ７とを備えており、位置検出ロッドの一端を第二ロッドブッシュ２３を貫通してピストンロッド２５のピストン側端部２５ｂに連結し、円筒状カバー６を、永久磁石５を固定した位置検出ロッドが円筒状カバー６内で往復動可能な所定長さに形成して永久磁石５を固定した位置検出ロッド４を覆うとともに、シリンダ本体２に取付けたものである。【選択図】図３
Bibliography:Application Number: JP20150136643