JPH0419257Y2 - - Google Patents

Info

Publication number
JPH0419257Y2
JPH0419257Y2 JP1986189854U JP18985486U JPH0419257Y2 JP H0419257 Y2 JPH0419257 Y2 JP H0419257Y2 JP 1986189854 U JP1986189854 U JP 1986189854U JP 18985486 U JP18985486 U JP 18985486U JP H0419257 Y2 JPH0419257 Y2 JP H0419257Y2
Authority
JP
Japan
Prior art keywords
link
pin
hydraulic
shaft
spool
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
JP1986189854U
Other languages
Japanese (ja)
Other versions
JPS6394354U (en
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed filed Critical
Priority to JP1986189854U priority Critical patent/JPH0419257Y2/ja
Publication of JPS6394354U publication Critical patent/JPS6394354U/ja
Application granted granted Critical
Publication of JPH0419257Y2 publication Critical patent/JPH0419257Y2/ja
Expired legal-status Critical Current

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  • Control Of Fluid Gearings (AREA)
  • Transmission Devices (AREA)
  • Mechanically-Actuated Valves (AREA)
  • Reciprocating Pumps (AREA)
  • Actuator (AREA)

Description

【考案の詳細な説明】 (産業上の利用分野) 本考案は、油圧ポンプの吐出量制御装置等の油
圧制御装置に使用されるリンク機構に関する。
[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a link mechanism used in a hydraulic control device such as a discharge amount control device for a hydraulic pump.

(従来の技術) 従来、可変容量形油圧ポンプの吐出量を制御す
る油圧装置として、第1図示のように、固定の中
心軸aに揺動自在にリンクbを設け、該リンクb
の一端に凹孔cを形成し、該凹孔cに、油圧スプ
ールeの軸端に形成した軸孔に一端を挿入したピ
ンfの他端部を係合させ、該リンクbの他端にば
ねgの力とパイロツトピストンhの力との差によ
つて生ずる回転モーメントで該油圧スプールeに
移動を与えるようにしたものが知られている。こ
の場合、油圧ポンプiのシリンダブロツクjは制
御ピストンkに連結され、該制御ピストンkに直
角に出没自在にパイロツトピストンhが設けられ
る。そして、該油圧ポンプiの吐出回路1の吐出
圧が例えば高まると、その吐出圧はパイロツト回
路mを介してパイロツトピストンhに作用し、そ
の力がばねgの力よりも大きいとリンクbは矢印
の方向に揺動する。この揺動でサーボ弁dの油圧
スプールeは押され、パイロツト回路mを制御ピ
ストンkの大径の受圧面nへのパイロツト回路o
へ接続するように動き、制御ピストンkはパイロ
ツトピストンhと共にシリンダブロツクjを揺動
し乍ら矢印の方向に移動する。その結果、リンク
bにパイロツトピストンhが与える回転モーメン
トとばねgにより与えられる回転モーメントとが
釣合うようになると、リンクbは揺動位置から戻
り、サーボ弁dの油圧スプールeはばねpに押さ
れてパイロツト回路m,o間の接続を断つように
移動し、制御ピストンkの移動及びシリンダブロ
ツクjの点qを中心とした揺動が止る。こうした
該シリンダブロツクjの揺動で、ポンプiの吐出
量は吐出圧に見合つた分だけ減少される。また、
吐出回路1の吐出圧が低くなると、パイロツトピ
ストンhに作用する圧力が弱くなるので、リンク
bはばねgに押されて前記の場合と逆方向に揺動
し、制御ピストンkは、サーボ弁dの油圧スプー
ルeにより前記の場合と逆方向にシリンダブロツ
クjを揺動し乍ら移動し、ポンプiの吐出量を増
大させる。
(Prior Art) Conventionally, as a hydraulic device for controlling the discharge amount of a variable displacement hydraulic pump, as shown in FIG.
A recessed hole c is formed at one end, and the other end of the pin f, whose one end is inserted into the shaft hole formed at the shaft end of the hydraulic spool e, is engaged with the recessed hole c, and the other end of the pin f is inserted into the other end of the link b. It is known that the hydraulic spool e is moved by the rotational moment generated by the difference between the force of the spring g and the force of the pilot piston h. In this case, the cylinder block j of the hydraulic pump i is connected to a control piston k, and a pilot piston h is provided so as to be freely retractable and retractable at right angles to the control piston k. When the discharge pressure of the discharge circuit 1 of the hydraulic pump i increases, for example, the discharge pressure acts on the pilot piston h via the pilot circuit m, and if the force is greater than the force of the spring g, the link b swing in the direction of. This swing pushes the hydraulic spool e of the servo valve d, which connects the pilot circuit m to the large diameter pressure receiving surface n of the control piston k.
The control piston k moves in the direction of the arrow while swinging the cylinder block j together with the pilot piston h. As a result, when the rotational moment applied by the pilot piston h to the link b and the rotational moment applied by the spring g become balanced, the link b returns from its swinging position, and the hydraulic spool e of the servo valve d is pushed by the spring p. The control piston k stops moving and the cylinder block j stops swinging about point q. Due to this rocking of the cylinder block j, the discharge amount of the pump i is reduced by an amount commensurate with the discharge pressure. Also,
When the discharge pressure of the discharge circuit 1 becomes lower, the pressure acting on the pilot piston h becomes weaker, so the link b is pushed by the spring g and swings in the opposite direction to the above case, and the control piston k moves toward the servo valve d. The cylinder block j is oscillated and moved by the hydraulic spool e in the opposite direction to that in the above case, thereby increasing the discharge amount of the pump i.

(考案が解決しようとする問題点) 前記リンクbが中心軸aを中心として揺動した
場合、油圧スプールeとの間にピンfが介在して
いるので、該リンクbの揺動で生ずる油圧スプー
ルeの軸方向と直交する方向の動きrがピンfに
於いて吸収され、油圧スプールeがその軸方向に
円滑に移動することが出来るが、該ピンfは油圧
スプールeの端部の軸孔に遊動状態で挿入されて
いるだけであるので、該ピンfは装置の組立、分
解時に落下し易い不都合がある。
(Problem to be solved by the invention) When the link b swings about the central axis a, since the pin f is interposed between it and the hydraulic spool e, the hydraulic pressure generated by the swing of the link b The movement r in the direction orthogonal to the axial direction of the spool e is absorbed by the pin f, allowing the hydraulic spool e to move smoothly in the axial direction. Since the pin f is only inserted into the hole in a loose state, there is a disadvantage that the pin f is likely to fall when the device is assembled or disassembled.

本考案は、こうした不都合のないリンク機構を
提供することを目的とするものである。
The present invention aims to provide a link mechanism that does not have these disadvantages.

(問題点を解決するための手段) 本考案では、固定の中心軸に揺動自在に設けた
リンクの一端に凹孔を形成し、該凹孔に、油圧ス
プールの軸端に形成した軸孔へ一端を挿入したピ
ンの他端部を係合し、該リンクの他端に作用する
回転モーメントにより該油圧スプールを移動させ
るようにしたものに於いて、該ピンの前記一端の
周囲と前記軸孔の内面との間に弾性材を介在させ
たことにより、該ピンの落下を防止するようにし
た。該弾性部材はゴム製のOリング又はキヤツプ
で構成することが好ましい。
(Means for solving the problem) In the present invention, a recessed hole is formed at one end of a link that is swingably provided on a fixed central shaft, and a shaft hole formed at the shaft end of the hydraulic spool is inserted into the recessed hole. The hydraulic spool is moved by the rotational moment acting on the other end of the link by engaging the other end of the pin with one end inserted into the link, and in which the hydraulic spool is moved by the rotational moment acting on the other end of the link. By interposing an elastic material between the pin and the inner surface of the hole, the pin is prevented from falling. Preferably, the elastic member is a rubber O-ring or cap.

(作用) 該ピンの一端の周囲と油圧スプールの軸端の軸
孔の内面との間に弾性材を介在させたことによ
り、該リンクに揺動が与えられたとき該ピンは油
圧スプールの軸方向と直交方向に該弾性材を圧縮
して揺動することが出来、油圧スプールの軸方向
への移動を円滑に行なえ、装置の組立、分解時に
は該ピンは弾性材により油圧スプールの軸孔に嵌
着状態で保持されるので落下する不都合がない。
(Function) By interposing an elastic material between the periphery of one end of the pin and the inner surface of the shaft hole at the shaft end of the hydraulic spool, the pin moves along the shaft of the hydraulic spool when rocking is applied to the link. The elastic material can be compressed and swung in the direction orthogonal to the direction, allowing the hydraulic spool to move smoothly in the axial direction, and when the device is assembled or disassembled, the pin is inserted into the shaft hole of the hydraulic spool by the elastic material. Since it is held in a fitted state, there is no inconvenience of it falling off.

(実施例) 本考案の実施例を、油圧ポンプの吐出量制御装
置に適用した場合につき第2図及び第3図に基づ
いて説明すると、第2図に於いて、符号1は適当
な機体に固定された中心軸2に揺動自在に取付け
されたリンクを示し、該リンク1の一端1aには
前記第1図示のものと同様の凹孔3が形成され、
該凹孔1aには、油圧スプール4の軸端4aに形
成した軸孔4bに一端が挿入されたピン5の他端
部を係合させた。該リンク1の他端1bには、ば
ね6とパイロツトピストン7の押圧力の差により
生ずる回転モーメントが作用する。
(Example) An example of the present invention applied to a discharge amount control device of a hydraulic pump will be explained based on FIGS. 2 and 3. In FIG. A link is shown that is swingably attached to a fixed central shaft 2, and one end 1a of the link 1 is formed with a concave hole 3 similar to that shown in the first figure.
The other end of a pin 5, one end of which was inserted into a shaft hole 4b formed in the shaft end 4a of the hydraulic spool 4, was engaged with the recessed hole 1a. A rotational moment generated by the difference in pressing force between the spring 6 and the pilot piston 7 acts on the other end 1b of the link 1.

この場合、該油圧スプール4は第1図示のもの
と同様のサーボ弁8を構成し、またパイロツトピ
ストン7も油圧ポンプ9のシリンダブロツク10
に連結した制御ピストン11に取付けられて該ポ
ンプ9の吐出回路12の圧力の作用を受け、該制
御ピストン11の作動を制御することによりポン
プ9の吐出量を制御するように構成される。
In this case, the hydraulic spool 4 constitutes a servo valve 8 similar to that shown in the first figure, and the pilot piston 7 also constitutes a cylinder block 10 of the hydraulic pump 9.
The control piston 11 is attached to a control piston 11 connected to the pump 9 and is operated by the pressure of the discharge circuit 12 of the pump 9, and is configured to control the discharge amount of the pump 9 by controlling the operation of the control piston 11.

こうした構成は従来のものと特に変わりがない
が、本考案に於いては第3図示のように該ピン5
の一端の周囲と油圧スプール4の軸孔4bの内面
との間にゴム製Oリングや凹孔を備えたゴム製キ
ヤツプ等の弾性材13を介在させ、装置の組立、
分解時に該ピン5が軸端4aから落下することを
防止すると共に、該リンク1の揺動で油圧スプー
ル4の軸方向と直交する方向に該ピン5が揺動し
得るようにした。
Although this configuration is not particularly different from the conventional one, in the present invention, the pin 5 is
An elastic member 13 such as a rubber O-ring or a rubber cap with a recessed hole is interposed between the circumference of one end and the inner surface of the shaft hole 4b of the hydraulic spool 4, and the device is assembled.
This prevents the pin 5 from falling from the shaft end 4a during disassembly, and allows the pin 5 to swing in a direction perpendicular to the axial direction of the hydraulic spool 4 due to the swing of the link 1.

該弾性材13がOリングの場合、油圧スプール
4の軸端4aの軸孔4bの内部を拡大しておき、
該軸孔4bの内部にまずOリングの弾性材13を
収めたのち該ピン5を挿入し、これによりピン5
の周囲に弾性材13が捲回された状態とし、該ピ
ン5の軸孔4b内からの落下を防止することが可
能である。
When the elastic member 13 is an O-ring, the inside of the shaft hole 4b of the shaft end 4a of the hydraulic spool 4 is enlarged,
First, the elastic member 13 of the O-ring is placed inside the shaft hole 4b, and then the pin 5 is inserted.
By wrapping the elastic material 13 around the pin 5, it is possible to prevent the pin 5 from falling from the shaft hole 4b.

(考案の効果) 以上のように本考案に於いては、油圧制御装置
のリンクと油圧スプールを連接するピンの一端と
油圧スプールの軸孔の内面との間に弾性材を設け
たので、装置の組立、分解に際して該ピンの脱落
を防止できて便利であり、該ピンの油圧スプール
に対する揺動性が損なわれないので油圧スプール
の作動も円滑に行なえる等の効果がある。
(Effects of the invention) As described above, in the present invention, an elastic material is provided between one end of the pin connecting the link of the hydraulic control device and the hydraulic spool and the inner surface of the shaft hole of the hydraulic spool. It is convenient because the pin can be prevented from falling off during assembly and disassembly, and since the swingability of the pin relative to the hydraulic spool is not impaired, the hydraulic spool can be operated smoothly.

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

第1図は従来例の説明線図、第2図は本考案の
実施例の説明線図、第3図はその要部の拡大図で
ある。 1……リンク、1a……一端、1b……他端、
2……中心軸、3……凹孔、4……油圧スプー
ル、4a……軸端、4b……軸孔、5……ピン、
13……弾性材。
FIG. 1 is an explanatory diagram of a conventional example, FIG. 2 is an explanatory diagram of an embodiment of the present invention, and FIG. 3 is an enlarged view of the main part thereof. 1...link, 1a...one end, 1b...other end,
2... Central shaft, 3... Recessed hole, 4... Hydraulic spool, 4a... Shaft end, 4b... Shaft hole, 5... Pin,
13...Elastic material.

Claims (1)

【実用新案登録請求の範囲】 (1) 固定の中心軸に揺動自在に設けたリンクの一
端に凹孔を形成し、該凹孔に、油圧スプールの
軸端に形成した軸孔へ一端を挿入したピンの他
端部を係合し、該リンクの他端に作用する回転
モーメントにより該油圧スプールを移動させる
ようにしたものに於いて、該ピンの前記一端の
周囲と前記軸孔の内面との間に弾性材を介在さ
せたことを特徴とする油圧制御装置に於けるリ
ンク機構。 (2) 前記弾性材はゴム製のOリング又はキヤツプ
から成る請求項1に記載の油圧制御装置に於け
るリンク機構。
[Claims for Utility Model Registration] (1) A recessed hole is formed at one end of a link that is swingably provided on a fixed central shaft, and one end is connected to the shaft hole formed at the shaft end of the hydraulic spool. The other end of the inserted pin is engaged and the hydraulic spool is moved by the rotational moment acting on the other end of the link, and the area around the one end of the pin and the inner surface of the shaft hole A link mechanism in a hydraulic control device, characterized in that an elastic material is interposed between the link mechanism and the link mechanism. (2) The link mechanism in a hydraulic control device according to claim 1, wherein the elastic member is a rubber O-ring or a cap.
JP1986189854U 1986-12-11 1986-12-11 Expired JPH0419257Y2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1986189854U JPH0419257Y2 (en) 1986-12-11 1986-12-11

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1986189854U JPH0419257Y2 (en) 1986-12-11 1986-12-11

Publications (2)

Publication Number Publication Date
JPS6394354U JPS6394354U (en) 1988-06-17
JPH0419257Y2 true JPH0419257Y2 (en) 1992-04-30

Family

ID=31142527

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1986189854U Expired JPH0419257Y2 (en) 1986-12-11 1986-12-11

Country Status (1)

Country Link
JP (1) JPH0419257Y2 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4628738B2 (en) * 2004-10-01 2011-02-09 株式会社三共製作所 Motion conversion device and material feeding device having the same
JP2010043592A (en) * 2008-08-12 2010-02-25 Nachi Fujikoshi Corp Variable displacement piston pump

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5421905A (en) * 1977-07-20 1979-02-19 Mx Processer Reinhardt Reextracting of metal

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS53165975U (en) * 1977-06-02 1978-12-26

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5421905A (en) * 1977-07-20 1979-02-19 Mx Processer Reinhardt Reextracting of metal

Also Published As

Publication number Publication date
JPS6394354U (en) 1988-06-17

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