JPH0238802B2 - - Google Patents
Info
- Publication number
- JPH0238802B2 JPH0238802B2 JP55028878A JP2887880A JPH0238802B2 JP H0238802 B2 JPH0238802 B2 JP H0238802B2 JP 55028878 A JP55028878 A JP 55028878A JP 2887880 A JP2887880 A JP 2887880A JP H0238802 B2 JPH0238802 B2 JP H0238802B2
- Authority
- JP
- Japan
- Prior art keywords
- cylinder device
- cylinder
- valve
- extension
- oil chamber
- 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 - Lifetime
Links
- 230000008602 contraction Effects 0.000 claims description 14
- 239000003921 oil Substances 0.000 description 47
- 239000010720 hydraulic oil Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000007599 discharging Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は、２個のシリンダ装置を平行配置状態
に組み合せた油圧シリンダ装置、特に伸長時には
第１シリンダ装置の伸長後第２シリンダ装置が伸
長し、縮小時には第２シリンダ装置の縮小後第１
シリンダ装置が縮小するよう構成してなる油圧シ
リンダ装置に関するものである。Detailed Description of the Invention (Industrial Application Field) The present invention relates to a hydraulic cylinder device in which two cylinder devices are combined in a parallel arrangement state, and in particular, when the first cylinder device is extended, the second cylinder device is extended. However, when contracting, the first cylinder unit is
The present invention relates to a hydraulic cylinder device configured to reduce the size of the cylinder device.
（従来の技術）
このような油圧シリンダ装置は、例えばトラツ
ククレーン等の油圧伸縮ブームの伸縮装置として
用いられているのである。従来この種油圧シリン
ダ装置の一従来例は、第２図に示す如く、第１シ
リンダ装置１と第２シリンダ装置２の各ピストン
ロツド３，４が互に反対方向に伸縮する如く、第
１および第２シリンダ１，２の各シリンダ５，６
を並設固定している。そして第１、第２シリンダ
装置１，２の各縮小側油室７，８を油路９を介し
て連通すると共に第１シリンダ装置１の縮小側油
室７をピストンロツド３内に配設した油路１０を
介して当該ピストンロツド３先端に設けた縮小時
供給ポート１１に接続している。１２は、第１シ
リンダ装置１のピストンロツド３の先端に設けた
伸長時供給ポート。１３は、第１シリンダ装置１
のシリンダ５における反ピストンロツド側端部に
その一端を連結されそこから第１シリンダ装置１
のピストン１３′を油密摺動自在に貫通してピス
トンロツド３内へ延在させた中空管であつて、前
記伸長時供給ポート１２を、当該中空間１３によ
り第１シリンダ装置１におけるシリンダ５の反ピ
ストンロツド側端部に連通するものである。中空
管１３の一端開口は、第１給排油路１４を介して
第１シリンダ装置１の伸長側油室１７へ接続する
と共に、第２給排油路１５を介して第２シリンダ
装置２の伸長側油室１８へ接続されている。そし
て、前記第１給排油路１４には、縮小時に第２シ
リンダ装置２の縮小終端で作動して第１シリンダ
装置１の伸長側油室１７を中空管１３側へ通じる
第１弁装置１６が介装されている。また、前記第
２給排油路１５には、伸長時に第１シリンダ装置
１の伸長終端で作動して前記中空管１３側を第２
シリンダ装置２の伸長側油室１８へ通じる第２弁
装置１９が設けられている。そして、この第２弁
装置１９は、第１シリンダ装置１におけるシリン
ダ５のピストンロツド側端部壁２０内に配置され
ており且つ第１シリンダ装置１の軸線方向に移動
可能なよう第１シリンダ装置１の前記ピストンロ
ツド側端壁２０から縮小側油室７内に突出した操
作杆２０′を備えて構成されており、第１シリン
ダ装置１の伸長終端で第１シリンダ装置１のピス
トン１３′の端面が前記操作杆２０′を押し前記第
２弁装置１９が第２シリンダ装置２の伸長側油室
１８を前記中空管１３側へ通じるよう構成してい
る。尚、図においてＣはカウンタバランス弁であ
る。(Prior Art) Such a hydraulic cylinder device is used, for example, as a telescoping device for a hydraulic telescoping boom of a truck crane or the like. A conventional example of this type of hydraulic cylinder device is, as shown in FIG. 2 cylinders 1 and 2, each cylinder 5 and 6
are fixed in parallel. The reduction-side oil chambers 7 and 8 of the first and second cylinder devices 1 and 2 are communicated via an oil passage 9, and the reduction-side oil chamber 7 of the first cylinder device 1 is provided with oil disposed within the piston rod 3. It is connected via a passage 10 to a contraction supply port 11 provided at the tip of the piston rod 3. 12 is a supply port provided at the tip of the piston rod 3 of the first cylinder device 1 during expansion. 13 is the first cylinder device 1
One end of the cylinder 5 is connected to the opposite end of the piston rod from which the first cylinder device 1 is connected.
The hollow tube extends into the piston rod 3 by penetrating the piston 13' in an oil-tight manner and extending into the piston rod 3. It communicates with the opposite end of the piston rod. One end opening of the hollow pipe 13 is connected to the extension side oil chamber 17 of the first cylinder device 1 via the first oil supply and drainage passage 14 and is connected to the second cylinder device 2 via the second oil supply and drainage passage 15. It is connected to the extension side oil chamber 18 of. A first valve device is provided in the first oil supply/drainage path 14 and operates at the end of the contraction of the second cylinder device 2 during contraction to communicate the extension side oil chamber 17 of the first cylinder device 1 to the hollow pipe 13 side. 16 is interposed. Further, the second oil supply/drainage passage 15 is provided with a second oil supply/drainage passage 15 which operates at the end of the extension of the first cylinder device 1 at the time of extension, and which connects the hollow pipe 13 side to the second oil supply/drainage passage 15.
A second valve device 19 communicating with the extension side oil chamber 18 of the cylinder device 2 is provided. The second valve device 19 is disposed within the piston rod side end wall 20 of the cylinder 5 in the first cylinder device 1 and is movable in the axial direction of the first cylinder device 1. The operating rod 20' protrudes from the piston rod side end wall 20 into the contraction side oil chamber 7, and the end surface of the piston 13' of the first cylinder device 1 at the end of extension of the first cylinder device 1. The second valve device 19 is configured to communicate the extension side oil chamber 18 of the second cylinder device 2 to the hollow pipe 13 side by pushing the operating rod 20'. In the figure, C is a counterbalance valve.
このように構成した油圧シリンダ装置は、伸長
時供給ポート１２から作動油を供給すると共に縮
小時供給ポート１１から作動油を排出すること
で、先ず第１シリンダ装置１が伸長ししかる後第
２シリンダ装置２が伸長し、縮小時供給ポート１
１から作動油を供給すると共に伸長時供給ポート
１２から作動油を排出することで、先ず第２シリ
ンダ装置２が縮小ししかる後第１シリンダ装置１
が縮小するものであるから、極めて簡単な構成で
以つて自動的に各シリンダ装置１，２の順次伸縮
動が達成できるものである。 The hydraulic cylinder device configured in this manner supplies hydraulic oil from the supply port 12 during extension and discharges hydraulic oil from the supply port 11 during contraction, so that the first cylinder device 1 is first extended and then the second cylinder When device 2 is extended and contracted, supply port 1
By supplying hydraulic oil from the supply port 12 and discharging the hydraulic oil from the supply port 12 during extension, the second cylinder device 2 first contracts, and then the first cylinder device 1
Since the cylinders 1 and 2 are reduced in size, it is possible to automatically extend and retract the cylinder devices 1 and 2 sequentially with an extremely simple structure.
（従来技術の問題点）
しかしながら、上記の如く構成した従来の油圧
シリンダ装置にあつては、第２弁装置１９が、第
１シリンダ装置１におけるシリンダ５のピストン
ロツド側端部壁２０内に配置されているため、第
２弁装置１９と第２シリンダ装置２の伸長側油室
１８間の第２給排油路１５部分の配管に手間がか
かるばかりでなく、その操作杆２０′の外径寸法
を第１シリンダ装置１におけるシリンダ５の内周
面とピストンロツド３の外周面間に位置させる必
要から、第１シリンダ装置１におけるシリンダ５
の内径が必要以上に大きくなり、これが油圧シリ
ンダ装置のコンパクト化の障害となつていた。ま
た、第１シリンダ装置１と第２シリンダ装置２
は、シリンダ軸線に沿う支承面によつて連結固定
されているため、第２シリンダ装置２に作用する
軸線方向の力を第１シリンダ装置１に確実に伝達
することができないという問題があつた。(Problems with the Prior Art) However, in the conventional hydraulic cylinder device configured as described above, the second valve device 19 is disposed within the piston rod side end wall 20 of the cylinder 5 in the first cylinder device 1. Therefore, not only is it time-consuming to pipe the second oil supply/discharge passage 15 between the second valve device 19 and the extension side oil chamber 18 of the second cylinder device 2, but also the outer diameter dimension of the operating rod 20' is Since it is necessary to position the cylinder 5 in the first cylinder device 1 between the inner circumferential surface of the cylinder 5 and the outer circumferential surface of the piston rod 3, the cylinder 5 in the first cylinder device 1 is
The inner diameter of the hydraulic cylinder has become larger than necessary, which has been an obstacle to making the hydraulic cylinder device more compact. In addition, the first cylinder device 1 and the second cylinder device 2
Since these are connected and fixed by a support surface along the cylinder axis, there is a problem in that the axial force acting on the second cylinder device 2 cannot be reliably transmitted to the first cylinder device 1.
（本発明の目的）
本発明は、上記従来技術の問題点を解決した新
規な油圧シリンダ装置を提供することを目的とす
るものである。(Object of the present invention) An object of the present invention is to provide a novel hydraulic cylinder device that solves the problems of the prior art described above.
（問題点を解決するための手段）
本発明は、上記従来技術の問題点を解決するた
めに、従来技術における第２弁装置１９およびこ
の第２弁装置の作動機構を次の如く構成したもの
である。(Means for Solving the Problems) In order to solve the problems of the prior art described above, the present invention has the second valve device 19 and the operating mechanism of the second valve device in the prior art configured as follows. It is.
すなわち、第２弁装置は、その弁箱に第２シリ
ンダ装置２のシリンダ軸線に直交する支承面を設
け、当該支承面で第２シリンダ装置２におけるシ
リンダの反ピストンロツド側端面を支持するよう
第１シリンダ装置１におけるシリンダ５のピスト
ンロツド側端部外側に固設すると共に、第１シリ
ンダ装置１の径方向に移動可能なよう第１シリン
ダ装置１の縮小側油室７内に突出した操作杆を備
えており、一方第１シリンダ装置１のピストン１
３′には、第１シリンダ装置１の伸長終端時に前
記第２弁装置１９の操作杆に係合して当該操作杆
を第１シリンダ装置１の径方向に押し出すための
テーパー部を設け、前記第２弁装置は前記操作杆
が押し出されたとき第２シリンダ装置２の伸長側
油室１８を中空管１３側へ通じるよう構成し、か
つ、第２弁装置１９は前記支承面に油路を穿設
し、当該油路に第２シリンダ装置２の伸長側油室
１８の給排ポートを当接させて第２シリンダ装置
２の伸長側油室１８に圧油を供給するよう構成し
たものである。 That is, the second valve device is provided with a support surface perpendicular to the cylinder axis of the second cylinder device 2 in its valve box, and the first valve device is configured to support the end surface of the cylinder in the second cylinder device 2 on the side opposite to the piston rod on the support surface. An operating rod is fixed to the outside of the piston rod side end of the cylinder 5 in the cylinder device 1 and protrudes into the contraction side oil chamber 7 of the first cylinder device 1 so as to be movable in the radial direction of the first cylinder device 1. On the other hand, the piston 1 of the first cylinder device 1
3' is provided with a tapered portion for engaging with the operating rod of the second valve device 19 and pushing out the operating rod in the radial direction of the first cylinder device 1 at the end of extension of the first cylinder device 1, The second valve device is configured to communicate the extension side oil chamber 18 of the second cylinder device 2 to the hollow pipe 13 side when the operating rod is pushed out, and the second valve device 19 is configured to have an oil passage in the support surface. is constructed so that pressure oil is supplied to the extension side oil chamber 18 of the second cylinder device 2 by making a supply/discharge port of the extension side oil chamber 18 of the second cylinder device 2 come into contact with the oil passage. It is.
（作用）
第２弁装置およびその作動機構を上記の如く構
成したことにより、従来技術の如く第２弁装置の
操作杆の外径寸法が第１シリンダ装置１における
シリンダ５の内周面とピストンロツド３の外周面
間に収まるよう第１シリンダ装置１におけるシリ
ンダ５の内径寸法を確保する必要がなくなり、第
１シリンダ装置１は、そのシリンダ５の内径決定
に際し第２弁装置１９の制約を受けることがなる
ので、従来のものに比して油圧シリンダ装置全体
をコンパクトに製作できるものである。(Function) By configuring the second valve device and its operating mechanism as described above, unlike in the prior art, the outer diameter of the operating rod of the second valve device is aligned with the inner circumferential surface of the cylinder 5 in the first cylinder device 1 and the piston rod. It is no longer necessary to ensure the inner diameter dimension of the cylinder 5 in the first cylinder device 1 so as to fit between the outer circumferential surfaces of the cylinders 3 and 3, and the first cylinder device 1 is no longer subject to the restrictions of the second valve device 19 when determining the inner diameter of the cylinder 5. Therefore, the entire hydraulic cylinder device can be manufactured more compactly than conventional ones.
また、第２弁装置１９にシリンダ軸線に直交す
る支承面を設けこの支承面で第２シリンダ装置２
を支持するようにしたので、第２シリンダ装置２
に作用する軸線方向の力をシリンダ軸線に直交す
る支承面で受けて第１シリンダ装置１に伝達する
ことができ、力の伝達を合理的に行なえるもので
ある他、第２弁装置１９から第２シリンダ装置２
の伸長側油室１８への送油を第２弁装置１９に穿
設した油路によつて行なえるようにしたので、配
管を簡略化することができたものである。 Further, the second valve device 19 is provided with a bearing surface orthogonal to the cylinder axis, and this bearing surface allows the second cylinder device 2 to
Since the second cylinder device 2
The axial force acting on the cylinder can be received by the bearing surface orthogonal to the cylinder axis and transmitted to the first cylinder device 1, and the force can be transmitted rationally. Second cylinder device 2
Since the oil can be sent to the extension side oil chamber 18 by the oil passage bored in the second valve device 19, the piping can be simplified.
実施例
第１図に基づいて本発明の実施例を説明する。
本発明の油圧シリンダ装置は、第２図に示し上述
した従来の油圧シリンダ装置に比し、第２弁装置
１９の配置構成並びにその作動機構が異るのみで
あるので、従来技術の説明において用いた符号並
びにその説明は、以下の説明においてもそのまゝ
援用する。Embodiment An embodiment of the present invention will be described based on FIG.
The hydraulic cylinder device of the present invention differs from the conventional hydraulic cylinder device shown in FIG. 2 and described above only in the arrangement of the second valve device 19 and its operating mechanism. The reference numerals and their explanations will be used as is in the following explanation.
第１図において、第２弁装置１９は、第１シリ
ンダ装置１におけるシリンダ５のピストンロツド
側端部外側であつて第２シリンダ装置２の位置す
る側に固定配置されており且つ第１シリンダ装置
１の径方向に移動可能なよう第１シリンダ装置１
の縮小側油室７内に突出した操作杆２０′を備え
ている。一方第１シリンダ装置１のピストン１
３′には第１シリンダ装置１の伸長終端時に前記
第２弁装置１９の操作杆２０′内端に係合して当
該操作杆２０′を第１シリンダ装置１の径方向に
押し出すためのテーパー部２１が設けている。そ
して、前記第２弁装置１９は、前記操作杆２０′
が押し出されたとき第２シリンダ装置２の伸長側
油室を中空管１３側へ通じるよう構成している。 In FIG. 1, the second valve device 19 is fixedly arranged on the outside of the piston rod side end of the cylinder 5 of the first cylinder device 1 and on the side where the second cylinder device 2 is located. The first cylinder device 1 is movable in the radial direction.
It is provided with an operating rod 20' that protrudes into the contraction side oil chamber 7. On the other hand, the piston 1 of the first cylinder device 1
3' has a taper for engaging with the inner end of the operating rod 20' of the second valve device 19 and pushing out the operating rod 20' in the radial direction of the first cylinder device 1 at the end of extension of the first cylinder device 1. Section 21 is provided. The second valve device 19 is connected to the operating rod 20'.
The oil chamber on the extension side of the second cylinder device 2 is configured to communicate with the hollow tube 13 side when the second cylinder device 2 is pushed out.
第２弁装置１９の構造をより具体的に説明する
と以下のようである。 A more specific explanation of the structure of the second valve device 19 is as follows.
第２弁装置１９は、第１シリンダ装置１におけ
るシリンダ５のピストンロツド側端部外側に固定
配設されている。２８は第２弁装置１９に設けら
れたシリンダ軸線に直交する支承面であり、当該
支承面２８で、第２シリンダ装置２におけるシリ
ンダ６の反ピストンロツド側端面を支持するよう
になつている。２９は第２弁装置１９の前記支承
面２８に穿設した油路であり、第２シリンダ装置
２の伸長側油室１８の給排ポート３０が当接して
取り付けられており、第２弁装置１９から第２シ
リンダ装置２の伸長側油室１８へ圧油を供給でき
るようになつている。第２弁装置１９は、弁箱２
２内に穿設された上部弁室２３および下部弁室２
４、上下弁室２３，２４間の弁座２５、弁座２５
にスプリング２６により下方に押し付けられ上下
弁室２３，２４間の連通を遮断する弁体２７およ
び弁体２７下部に直結した操作杆２０′により構
成されている。そして操作杆２０′は、前述せる
ようにその下端を第１シリンダ装置１の縮小側油
室７内に若干量突出しており、第１シリンダ装置
１の伸長終端時にピストン１３′のテーパー部２
１に係合して第１シリンダ装置１の外径方向すな
わち上方へ押し出されるように構成している。操
作杆２０′が上方へ押し出されると弁体２７がス
プリング２６に抗して上方へ移動し、その結果上
下油室２３，２４間が連通される。前記上部弁室
２３は、第２給排油路１５における中空管７側に
接続されており、下部弁室２４は、第２給排油路
１５における第２シリンダ装置２の伸長側油室１
８側へ接続されている。 The second valve device 19 is fixedly disposed outside the piston rod side end of the cylinder 5 in the first cylinder device 1 . Reference numeral 28 denotes a support surface provided on the second valve device 19 and perpendicular to the cylinder axis, and the support surface 28 supports the end surface of the cylinder 6 in the second cylinder device 2 on the side opposite to the piston rod. Reference numeral 29 denotes an oil passage bored in the support surface 28 of the second valve device 19, and the supply/discharge port 30 of the extension side oil chamber 18 of the second cylinder device 2 is attached to the oil passage in contact with the oil passage 29. Pressure oil can be supplied from 19 to the extension side oil chamber 18 of the second cylinder device 2. The second valve device 19 includes a valve box 2
Upper valve chamber 23 and lower valve chamber 2 bored in 2
4. Valve seat 25 between upper and lower valve chambers 23 and 24, valve seat 25
The valve body 27 is composed of a valve body 27 that is pressed downward by a spring 26 to cut off communication between the upper and lower valve chambers 23 and 24, and an operating rod 20' that is directly connected to the lower part of the valve body 27. As mentioned above, the operating rod 20' has its lower end slightly protruding into the contraction side oil chamber 7 of the first cylinder device 1, and when the first cylinder device 1 reaches the end of extension, the taper portion of the piston 13'
1 and is pushed out in the outer radial direction of the first cylinder device 1, that is, upwardly. When the operating rod 20' is pushed upward, the valve body 27 moves upward against the spring 26, and as a result, the upper and lower oil chambers 23 and 24 are communicated with each other. The upper valve chamber 23 is connected to the hollow pipe 7 side in the second oil supply and drainage passage 15, and the lower valve chamber 24 is connected to the extension side oil chamber of the second cylinder device 2 in the second oil supply and drainage passage 15. 1
Connected to the 8th side.
（効果）
このように構成した油圧シリンダ装置は、従来
の油圧シリンダ装置と同様に、伸長時には第１シ
リンダ装置１側から、縮小時には第２シリンダ装
置２側から、順次伸縮するものであるが、第２弁
装置１９が、弁箱２２に設けたシリンダ軸線に直
交する支承面によつて第２シリンダ装置２を支持
するよう第１シリンダ装置１におけるシリンダ５
のピストンロツド側端部外側に固定配設され且つ
その操作杆２０′が第１シリンダ装置１の縮小側
油室７内に若干突出しているのみであるので、従
来のものに比して、第２シリンダ装置２の軸線方
向に作用する力を合理的に第１シリンダ装置１に
伝達できるほか、第２弁装置１９と第２シリンダ
装置２の伸長側油室１８間の配管が簡略化でき、
しかも、第１シリンダ装置１のシリンダ内径寸法
を大きくする必要がなく全体としてコンパクトな
油圧シリンダ装置を製作できるという秀れた効果
を有するものである。(Effects) The hydraulic cylinder device configured as described above, like conventional hydraulic cylinder devices, expands and contracts sequentially from the first cylinder device 1 side when expanding and from the second cylinder device 2 side when contracting. The cylinder 5 in the first cylinder device 1 is configured such that the second valve device 19 supports the second cylinder device 2 by a bearing surface provided in the valve body 22 and perpendicular to the cylinder axis.
is fixedly disposed outside the end of the piston rod side, and its operating rod 20' only slightly protrudes into the contraction side oil chamber 7 of the first cylinder device 1. In addition to being able to rationally transmit the force acting in the axial direction of the cylinder device 2 to the first cylinder device 1, the piping between the second valve device 19 and the extension side oil chamber 18 of the second cylinder device 2 can be simplified.
Moreover, there is no need to increase the inner diameter of the cylinder of the first cylinder device 1, and an excellent effect is achieved in that it is possible to manufacture a hydraulic cylinder device that is compact as a whole.
第１図は本発明に係る油圧シリンダ装置の説明
図、第２図は、従来の油圧シリンダ装置の説明図
である。
第１シリンダ装置；１、第２シリンダ装置；
２、ピストンロツド；３，４、シリンダ；５，
６、縮小側油室；７，８、伸長側油室；１７，１
８、縮小時供給ポート；１１、伸長時供給ポー
ト；１２、中空管；１３、ピストン；１３′、第
１給排油路；１４、第２給排油路；１５、第１弁
装置；１６、第２弁装置；１９、操作杆；２０′、
テーパー部；２１。
FIG. 1 is an explanatory diagram of a hydraulic cylinder device according to the present invention, and FIG. 2 is an explanatory diagram of a conventional hydraulic cylinder device. First cylinder device; 1, second cylinder device;
2, piston rod; 3, 4, cylinder; 5,
6, Reduction side oil chamber; 7, 8, Extension side oil chamber; 17, 1
8. Supply port during contraction; 11. Supply port during extension; 12. Hollow pipe; 13. Piston; 13'; 1st oil supply and drainage passage; 14, 2nd oil supply and drainage passage; 16, second valve device; 19, operating rod; 20',
Tapered part; 21.
Claims (1)
２シリンダ装置１，２が逆向で互に平行配置とな
るよう第２シリンダ装置２を取り付けてなる伸縮
シリンダ装置であつて、第１、第２シリンダ装置
１，２の縮小側油室７，８を連通すると共に第１
シリンダ装置１のピストンロツド３先端に設けた
縮小時供給ポート１１と第１シリンダ装置１の縮
小側油室７を接続し、且つ第１油圧シリンダ装置
１のピストンロツド３先端に設けた伸長時供給ポ
ート１２を、第１シリンダ装置１のシリンダ５に
おける反ピストンロツド側端部から第１シリンダ
装置１のピストン１３′を貫通して第１シリンダ
装置１のピストンロツド３内へ延在させた中空管
１３を経て第１シリンダ装置１のシリンダ５にお
ける反ピストンロツド側端部に連通すると共にそ
こから第１および第２給排油路１４，１５を介し
て第１および第２シリンダ装置１，２の各伸長側
油室１７，１８へ接続し、更に前記第１給排油路
１４に、縮小時に第２シリンダ装置２の縮小終端
で作動して第１シリンダ装置１の伸長側油室１７
を前記中空管１３側へ通じる第１弁装置１６を介
装すると共に、前記第２給排油路１５に、伸長時
に第１シリンダ装置１の伸長終端で作動して前記
中空管１３側を第２シリンダ装置２の伸長側油室
１８へ通じる第２弁装置１９を設け、伸長時には
第１シリンダ装置１の伸長後第２シリンダ装置２
が伸長し、縮小時には第２シリンダ装置２の縮小
後第１シリンダ装置１が縮小するよう構成してな
る油圧シリンダ装置において、前記第２弁装置１
９は、その弁箱に第２シリンダ装置２のシリンダ
軸線に直交する支承面を設け、当該支承面で第２
シリンダ装置２におけるシリンダの反ピストンロ
ツド側端面を支持するよう第１シリンダ装置１に
おけるシリンダ５のピストンロツド側端部外側に
固設すると共に、第１シリンダ装置１の径方向に
移動可能なよう第１シリンダ装置１縮小側油室７
内に突出した操作杆２０′を備えており、一方第
１シリンダ装置１のピストン１３′には、第１シ
リンダ装置１の伸長終端時に前記第２弁装置１９
の操作杆２０′に係合して当該操作杆２０′を第１
シリンダ装置１の径方向に押し出すテーパー部２
１を設け、前記第２弁装置１９は前記操作杆が押
し出されたとき第２シリンダ装置２の伸長側油室
１８を前記中空管１３側へ通じるよう構成し、か
つ、第２弁装置１９は前記支承面に油路を穿設
し、当該油路に第２シリンダ装置２の伸長側油室
１８の給排ポートを当接させて第２シリンダ装置
２の伸長側油室１８に圧油を供給するよう構成し
たことを特徴とする油圧シリンダ装置。1 A telescopic cylinder device in which a second cylinder device 2 is attached to the cylinder 5 of the first cylinder device 1 so that the first and second cylinder devices 1 and 2 are arranged parallel to each other in opposite directions, The reduction side oil chambers 7 and 8 of the two cylinder devices 1 and 2 are communicated with each other, and the first
A contraction supply port 11 provided at the tip of the piston rod 3 of the cylinder device 1 connects the contraction side oil chamber 7 of the first cylinder device 1, and an extension supply port 12 provided at the tip of the piston rod 3 of the first hydraulic cylinder device 1. is passed through a hollow tube 13 extending from the opposite end of the cylinder 5 of the first cylinder device 1 to the piston rod 3 of the first cylinder device 1 through the piston 13' of the first cylinder device 1. The oil on the extension side of the first and second cylinder devices 1 and 2 is communicated with the end of the cylinder 5 of the first cylinder device 1 on the side opposite to the piston rod, and from there through the first and second oil supply and drain passages 14 and 15. The extension side oil chamber 17 of the first cylinder device 1 is connected to the chambers 17 and 18 and is further connected to the first oil supply/discharge path 14 by operating at the end of contraction of the second cylinder device 2 during contraction.
A first valve device 16 that communicates with the hollow pipe 13 side is interposed, and a first valve device 16 is provided in the second oil supply/drainage path 15 that operates at the end of the extension of the first cylinder device 1 when the first cylinder device 1 is extended, so that the first valve device 16 communicates with the hollow pipe 13 side. A second valve device 19 is provided which communicates with the extension side oil chamber 18 of the second cylinder device 2, and when the first cylinder device 1 is extended, the second cylinder device 2 is opened.
In the hydraulic cylinder device configured such that the first cylinder device 1 is extended and the first cylinder device 1 is contracted after the second cylinder device 2 is contracted when contracting, the second valve device 1 is
9 is provided with a bearing surface perpendicular to the cylinder axis of the second cylinder device 2 on the valve box, and the second
The first cylinder is fixed to the outside of the end of the cylinder 5 on the piston rod side of the first cylinder device 1 so as to support the end surface of the cylinder on the side opposite to the piston rod of the cylinder in the cylinder device 2, and is movable in the radial direction of the first cylinder device 1. Device 1 Reduction side oil chamber 7
The piston 13' of the first cylinder device 1 is provided with an operating rod 20' projecting inwards, while the piston 13' of the first cylinder device 1 is provided with the second valve device 19 when the first cylinder device 1 is at the end of extension.
The operating lever 20' is engaged with the operating lever 20' of the
Tapered portion 2 that pushes out the cylinder device 1 in the radial direction
1, the second valve device 19 is configured to communicate the extension side oil chamber 18 of the second cylinder device 2 to the hollow pipe 13 side when the operating rod is pushed out, and the second valve device 19 An oil passage is bored in the support surface, and the supply/discharge port of the extension side oil chamber 18 of the second cylinder device 2 is brought into contact with the oil passage, so that pressure oil is supplied to the extension side oil chamber 18 of the second cylinder device 2. A hydraulic cylinder device characterized in that it is configured to supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2887880A JPS56124708A (en) | 1980-03-06 | 1980-03-06 | Oil pressure cylinder device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2887880A JPS56124708A (en) | 1980-03-06 | 1980-03-06 | Oil pressure cylinder device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS56124708A JPS56124708A (en) | 1981-09-30 |
| JPH0238802B2 true JPH0238802B2 (en) | 1990-09-03 |
Family
ID=12260637
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2887880A Granted JPS56124708A (en) | 1980-03-06 | 1980-03-06 | Oil pressure cylinder device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS56124708A (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5856786U (en) * | 1981-10-12 | 1983-04-18 | 株式会社 多田野鉄工所 | Multistage beam expansion and contraction device |
| JPS5954492U (en) * | 1982-09-29 | 1984-04-10 | 株式会社多田野鉄工所 | boom device |
| JPS60196409A (en) * | 1984-03-16 | 1985-10-04 | Tokyu Car Corp | Stretching device for multistage telescopic boom |
| JPH0223842Y2 (en) * | 1984-11-30 | 1990-06-29 | ||
| CN109973463B (en) * | 2019-04-22 | 2021-03-02 | 韶关市起重机厂有限责任公司 | Oil cylinder capable of reliably and sequentially stretching, multi-oil-cylinder sequential stretching mechanism and engineering machinery |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4930323U (en) * | 1972-06-16 | 1974-03-15 | ||
| JPS5241937A (en) * | 1975-09-30 | 1977-03-31 | Mitsubishi Electric Corp | Inductive heating cooker |
-
1980
- 1980-03-06 JP JP2887880A patent/JPS56124708A/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4930323U (en) * | 1972-06-16 | 1974-03-15 | ||
| JPS5241937A (en) * | 1975-09-30 | 1977-03-31 | Mitsubishi Electric Corp | Inductive heating cooker |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS56124708A (en) | 1981-09-30 |
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