JPS6318603U - - Google Patents

Description

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

第１図は、本考案に係るクツシヨン機構の実施
例のクツシヨン行程終期を示す一部切欠側面図、
第２図は同じく戻り行程初期を示す一部切欠側面
図、第３図は、クツシヨンリングに生じる相対的
な圧力分布を示す説明図、第４図は油圧シリンダ
全体を示す一部切欠側面図、第５図は従来の油圧
シリンダの要部を示す一部切欠側面図である。 １……クツシヨンリング、１ｂ……リブ、３…
…ピストン、４……連通溝、５……ロツド、５ａ
……ロツド段部、５ｂ……環状溝。 FIG. 1 is a partially cutaway side view showing the final stage of the cushion stroke of an embodiment of the cushion mechanism according to the present invention;
Fig. 2 is a partially cutaway side view showing the initial stage of the return stroke, Fig. 3 is an explanatory diagram showing the relative pressure distribution generated in the cushion ring, and Fig. 4 is a partially cutaway side view showing the entire hydraulic cylinder. , FIG. 5 is a partially cutaway side view showing the main parts of a conventional hydraulic cylinder. 1...Cushion ring, 1b...Rib, 3...
...Piston, 4...Communication groove, 5...Rod, 5a
... Rod stepped portion, 5b ... Annular groove.

補正 昭６１．９．１８ 実用新案登録請求の範囲を次のように補正する
。Amendment September 18, 1981 The scope of claims for utility model registration is amended as follows.

【実用新案登録請求の範囲】 ピストンに隣接するロツド周囲にロツド段部を
設け、該ロツド段部にクツシヨンリングを摺動可
能に遊嵌し、該クツシヨンリングのピストン側端
部に連通溝を設けると共に、該クツシヨンリング
又はロツド段部の一方の摺動面の略中央位置に凸
部を配設し、他方の前記凸部に対応する位置に摺
動方向の長さが前記凸部より長い凹部を配設し、
軸方向のクツシヨン行程で前記凸部がクツシヨン
リングとロツド段部の間隙を閉塞するよう構成す
ることを特徴とするチエツク機能付クツシヨン機
構。[Claims for Utility Model Registration] A rod stepped portion is provided around the rod adjacent to the piston, a cushion ring is slidably and loosely fitted into the rod stepped portion, and a communicating groove is provided at the piston side end of the cushion ring. and the cushion ring.
Alternatively, a convex portion is disposed approximately at the center of one sliding surface of the rod stepped portion, and a concave portion whose length in the sliding direction is longer than the convex portion is disposed at a position corresponding to the other convex portion,
A cushion mechanism with a check function, characterized in that the convex portion closes a gap between the cushion ring and the stepped rod portion during the cushion stroke in the axial direction.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] ピストンに隣接するロツド周囲にロツド段部を
設け、該ロツド段部にクツシヨンリングを摺動可
能に遊嵌し、該クツシヨンリングのピストン側端
部に連通溝を設けると共に、該クツシヨンリング
及びロツド段部の一方の摺動面の略中央位置に凸
部を配設し、他方の前記凸部に対応する位置に摺
動方向の長さが前記凸部より長い凹部を配設し、
軸方向のクツシヨン行程で前記凸部がクツシヨン
リングとロツド段部の間隙を閉塞するよう構成す
ることを特徴とするチエツク機能付クツシヨン機
構。 A rod stepped portion is provided around the rod adjacent to the piston, a cushion ring is slidably and loosely fitted into the rod stepped portion, a communicating groove is provided at the piston side end of the cushion ring, and the cushion ring is provided with a communicating groove at the piston side end. and a convex portion is disposed approximately at the center of one sliding surface of the rod stepped portion, and a concave portion whose length in the sliding direction is longer than the convex portion is disposed at a position corresponding to the other convex portion,
A cushion mechanism with a check function, characterized in that the convex portion closes a gap between the cushion ring and the stepped rod portion during the cushion stroke in the axial direction.