JPH02132865U

JPH02132865U -

Info

Publication number: JPH02132865U
Application number: JP4214589U
Authority: JP
Priority date: 1989-04-11
Filing date: 1989-04-11
Publication date: 1990-11-05

Description

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は本考案による携帯用油圧式作動機の高
速型ポンプ機構を示す第２図の−線に沿う要
部断面図、第２図は第１図の−線に沿う断面
図、第３図は同高速型ポンプ機構の概略断面図、
第４図は従来の携帯用油圧式作動機の要部断面図
、第５図は従来のポンプ機構を示す第３図と同様
の概略断面図である。１２……油槽、１３……シリンダ、１４……ピ
ストンヘツド、１５……ポンプ機構、１６……モ
ータ軸、１７……偏心軸、１８……カムフオロワ
、１９，２０，２１……ポンプ部（従来型）、２
２……ポンプシリンダ、２３……ピストン、２４
……連通孔、２５……ピストンリターンスプリン
グ、２６……連通路、２７……チエツクバルブ、
２８……チエツクバルブスプリング、３０……ピ
ストンロツド、４０，４１，４２，４３……ポン
プ部（本考案のもの）。 1 is a cross-sectional view of the main parts taken along the - line in FIG. 2 showing a high-speed pump mechanism of a portable hydraulic actuator according to the present invention; FIG. 2 is a sectional view taken along the line - in FIG. 1; The figure is a schematic cross-sectional view of the same high-speed pump mechanism.
FIG. 4 is a sectional view of a main part of a conventional portable hydraulic actuator, and FIG. 5 is a schematic sectional view similar to FIG. 3 showing a conventional pump mechanism. 12... Oil tank, 13... Cylinder, 14... Piston head, 15... Pump mechanism, 16... Motor shaft, 17... Eccentric shaft, 18... Cam follower, 19, 20, 21... Pump part (conventional type), 2
2... Pump cylinder, 23... Piston, 24
... Communication hole, 25 ... Piston return spring, 26 ... Communication passage, 27 ... Check valve,
28... Check valve spring, 30... Piston rod, 40, 41, 42, 43... Pump section (of the present invention).

Claims

【実用新案登録請求の範囲】油槽を備えたケーシング本体にこの油槽と連通
するシリンダを連結し、このシリンダ内にピスト
ンロツドを一体に連結した軸線方向摺動自在なピ
ストンヘツドを配設し、油槽とシリンダの間に、
偏心軸の偏心回転によりその円周上のピストンを
作動させ、油槽内の油をシリンダ内に圧送しピス
トンヘツドを前進させるポンプ機構を設けてなる
携帯用油圧式作動機において、ポンプ機構は、上記ピストンをそれぞれ有する
４つのポンプ部からなり、これらポンプ部は、偏
心軸の偏心回転に伴い、その内の一つがピストン
の上死点位置で圧油を作る負荷状態になつたとき
、他の三つは無負荷状態を保持する関係で配置さ
れ、偏心軸の一回転で４つのポンプ部をその回転
方向に順次負荷状態とすることを特徴とする携帯
用油圧式作動機の高速型ポンプ機構。[Scope of Claim for Utility Model Registration] A cylinder communicating with the oil tank is connected to a casing body equipped with an oil tank, and a piston head that is slidable in the axial direction and integrally connected to the piston rod is disposed within the cylinder, and the oil tank and the cylinder are connected to each other. between the cylinders,
In a portable hydraulic actuator equipped with a pump mechanism that operates a piston on its circumference by eccentric rotation of an eccentric shaft and forces oil in an oil tank into a cylinder to advance a piston head, the pump mechanism is as described above. It consists of four pump parts each having a piston, and when one of these pump parts becomes loaded to produce pressure oil at the top dead center position of the piston due to the eccentric rotation of the eccentric shaft, the other three pump parts A high-speed pump mechanism for a portable hydraulic actuator, characterized in that one rotation of an eccentric shaft sequentially places the four pump parts in a loaded state in the rotational direction, with one rotation of the eccentric shaft being arranged in such a manner as to maintain an unloaded state.