JPS6375641U

JPS6375641U -

Info

Publication number: JPS6375641U
Application number: JP15122487U
Authority: JP
Priority date: 1987-10-03
Filing date: 1987-10-03
Publication date: 1988-05-20
Also published as: JPH0224984Y2

Description

[Brief explanation of drawings]

第１図は本考案緩衝装置の第１の実施例の一部
断面とする側面図、第２図は本考案緩衝装置の第
２の実施例の一部断面とする側面図、第３図の
，，およびはそれぞれ移動量に対する緩衝
力ＦＢ，ｘ、速度Ｖ，ｘおよびオリフイス面積Ａ
，ｘのグラフおよび関連の式１〜５、第４図の
，およびはそれぞれ本考案装置によるオリフ
イス面積、減速および速度移動量との関係を示す
グラフ、第５図のは本考案による第１の実施例
の場合のオリフイス面積と移動量との関係を示す
グラフである。１０……シリンダ組立体、１１……外側シリン
ダまたはケーシング、１２，１２′……内側シリ
ンダ、１３，１３′……ピストン組立体、１４，
１４′……ピストン、１５……ピストンロツド、
１７……衝撃受止圧力部材、１８……圧縮ばね、
１９……貯槽、２０……多孔パツド、２１，２１
ｄ，２５，２６……孔、２２，２２ａ……開口、
２３……調整ピン、２４……円筒状孔。 FIG. 1 is a partially sectional side view of the first embodiment of the shock absorber of the present invention, FIG. 2 is a partially cross-sectional side view of the second embodiment of the shock absorber of the present invention, and FIG. , , and are respectively the buffering force FB,x, the speed V,x, and the orifice area A with respect to the travel amount.
, It is a graph showing the relationship between the orifice area and the amount of movement in the case of the example. 10... Cylinder assembly, 11... Outer cylinder or casing, 12, 12'... Inner cylinder, 13, 13'... Piston assembly, 14,
14'...piston, 15...piston rod,
17... Impact receiving pressure member, 18... Compression spring,
19... Storage tank, 20... Porous pad, 21, 21
d, 25, 26... hole, 22, 22a... opening,
23...adjustment pin, 24...cylindrical hole.

補正昭６２．１０．３１考案の名称を次のように補正する。考案の名称段階調量緩衝装置実用新案登録請求の範囲を次のように補正する
。Amendment October 31, 1982 The name of the invention is amended as follows. Title of the invention: Stepped metering buffer device The scope of the claims for utility model registration is amended as follows.

【実用新案登録請求の範囲】閉鎖した液圧シリンダと、この液圧シリンダ内
に設け、初期位置から最終位置に至る所定行程の
範囲内で移動自在のピストンと、ピストンが或る
衝撃荷重に応答して移動するとき、前記シリンダ
から流体を排出する流体排出部材とを具え、種々
の段階にわたる一連の衝撃荷重系の衝撃に対して
自動的に対応する段階調量緩衝装置において、前
記流体排出部材は、ピストンがその全移動行程の
第１段階部分を移動するときピストン移動量ＳＴ
の関数として自動的に徐々に流体排出量を減少さ
せて重量の範囲に基づく或る荷重系の第１段階部
分を吸収し、またピストンがその全移動行程の順
次の段階部分を移動するときピストン移動量ＳＴ
の関数として徐々に流体排出量を減少させて前記
或る荷重系の順次の段階部分を吸収する制御構造
とし、この制御構造は、シリンダ組立体１０の排
出表面にわたり設けた縦方向に互いに離れた一連
の孔２１よりなる複数個のグリープとするか、ま
たはピストン組立体１３′に形成した開口２４ａ
内に進入し、開口面積を段階的に変化させる輪郭
を有する調整ピストン２３としたことを特徴とす
る段階調量緩衝装置。 [Claims for Utility Model Registration] A closed hydraulic cylinder, a piston provided within the hydraulic cylinder and movable within a predetermined stroke range from an initial position to a final position, and a piston that responds to a certain impact load. a fluid evacuation member for ejecting fluid from the cylinder when the cylinder is moved; is the amount of piston movement ST when the piston moves through the first stage part of its total travel stroke
automatically gradually reduces fluid displacement as a function of the weight range to accommodate the first stage portion of a given load system and as the piston moves through successive stage portions of its full travel stroke. Movement amount ST
a control structure for absorbing successive step portions of a given load system by gradually reducing fluid displacement as a function of A plurality of greaves consisting of a series of holes 21 or openings 24a formed in the piston assembly 13'.
1. A step-adjustment damping device characterized by an adjustment piston 23 having a contour that enters into the interior and changes the opening area in steps.

Claims

[Claims for Utility Model Registration] 1. A shock absorber for decelerating an impact load, which comprises a closed hydraulic cylinder, a piston that moves within the cylinder over a predetermined distance from an initial position to a final position, and the piston. fluid passage means for discharging fluid from the forward cylinder portion of the piston when the piston moves from its initial position in response to an impact load; In a shock absorbing device provided with control means for controlling the discharge as described above, said control means is provided in a cylinder assembly 10 or a piston assembly 13' having a series of longitudinally spaced holes 21 closed by a piston assembly 13. Cylinder assembly 1 with member 23 closing hole 24
0', and gradually decreases the amount of fluid discharged as a function of the amount of movement of the piston assembly as the piston assembly moves through a predetermined portion defining a control region of the piston stroke. movement of the piston assembly as the piston assembly moves through another predetermined portion defining another control region of the piston stroke without adjustment to approximate the contour of a predetermined deceleration amount for a nominal mass system; Gradually reducing the fluid output as a function of volume, a driving force is applied at the point of impact and a subsequent position such that the mass, velocity and driving force defining an equivalent mass system at the point of impact are the same as those of said certain mass system. is provided with a control means for changing the total area of the discharge opening as a function of the amount of movement of the piston assembly so as to approximate the contour of a predetermined deceleration amount for another nominal mass system different from the certain mass system in different points. A buffer device featuring: 2. said predetermined portions of said stroke correspond respectively to an initial portion and a final portion of said stroke, wherein said certain mass system is received by said damping device in said initial portion of said stroke to which said control means provides a predetermined deceleration profile; The mass system has the minimum impact strength among the plurality of mass systems within the design range, and the other mass system for which the control means provides a predetermined deceleration profile in the final part of the stroke is the plurality of masses. 2. The shock absorber according to claim 1, wherein the shock absorber is a mass system having the highest impact strength among the systems. 3. Utility model registration claim 1, characterized in that the predetermined deceleration profile is a constant level of deceleration.
Or a shock absorber within the scope of Section 2. 4. The shock absorbing device according to claim 1, wherein the predetermined portion of the stroke is continuous with an adjacent portion of the stroke, and the corresponding control areas are successively continuous. 5. characterized in that the end point of the first control region of the sequential control regions is determined as the point at which a predetermined level is first reached in deceleration of the object to obtain a predetermined deceleration profile by the next control region; A buffer device according to claim 4 of the utility model registration claim. 6. The relationship between the fluid displacement and the amount of movement of the piston assembly over each of the control regions is expressed as follows for an object having a corresponding equivalent mass system in which the control region produces a predetermined deceleration profile when a propulsive force is applied at the point of impact and thereafter. The shock absorber according to claim 1, wherein the shock absorber is determined based on the speed at the starting point of the corresponding control region. 7. The control means includes orifice means for gradually reducing the orifice area for fluid delivery with respect to each control region, the control means having an approximate rate of reduction of the orifice area as a function of piston assembly travel; 2. The shock absorbing device according to claim 1, wherein the orifice means is configured to be different at an end point of a region than at an initial portion of another control region. 8. The shock absorber according to claim 7, wherein the orifice means reduces the orifice area exponentially with the amount of movement of the piston assembly in a certain control region. 9. The shock absorbing device according to claim 7, wherein the orifice means is provided with a plurality of discharge holes spaced apart from each other in the axial direction across the cylinder. 10. The shock absorbing device according to claim 9, wherein the discharge holes corresponding to a predetermined control region are arranged to be spaced apart from each other in the axial direction over corresponding portions of the stroke. 11 For a given control region, the fluid discharge holes discharge the same amount, and the orifice area decreases at a decreasing rate as the discharge holes gradually approach each other in the direction toward the final position of the piston assembly. 11. The shock absorbing device according to claim 10, characterized in that the shock absorbing device is constructed so as to be obtained by spacing in the axial direction. 12. The buffer according to claim 11, characterized in that the discharge amount of the individual discharge holes in a certain control region is different from the discharge amount of the individual discharge holes in other control regions. Device. 13. The orifice means is provided with adjustment means, the adjustment means being provided with means for substantially parabolically reducing the total orifice area discharging fluid from the cylinder with respect to movement of the piston assembly in a certain control region. The shock absorbing device according to claim 7 of the utility model registration claim. 14 Continuing the control areas, and making these control areas correspond to a first area of the stroke and a second area adjacent to the first area, and adjusting the transition between the first control area and the second control area. The approximately parabolic leading relationship between the rate of reduction of the orifice area and the amount of piston assembly travel ends at a point where the rate of decrease of the orifice area with respect to the amount of piston assembly travel is slower than the previous rate. 14. The shock absorbing device according to claim 13, wherein a new parabolic relationship having an initial amount is started in the second control region. 15 The orifice means includes a fluid discharge orifice, an adjustment pin whose cross section gradually becomes smaller toward the end, and whose end is accommodated in the orifice, and an amount of movement of the piston from the initial position increases. and pin receiving means for further blocking said orifice so that said pin can penetrate axially into said orifice as the pin moves, so that the area of the orifice discharging fluid from the cylinder gradually decreases over the stroke of the piston. A shock absorbing device according to claim 7 of the utility model registration, characterized in that it is configured as follows.