JPS609442Y2 - Double acting hydraulic cylinder - Google Patents
Double acting hydraulic cylinderInfo
- Publication number
- JPS609442Y2 JPS609442Y2 JP1980024699U JP2469980U JPS609442Y2 JP S609442 Y2 JPS609442 Y2 JP S609442Y2 JP 1980024699 U JP1980024699 U JP 1980024699U JP 2469980 U JP2469980 U JP 2469980U JP S609442 Y2 JPS609442 Y2 JP S609442Y2
- Authority
- JP
- Japan
- Prior art keywords
- piston
- oil
- circumferential surface
- oil passage
- 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
Links
Landscapes
- Details Of Reciprocating Pumps (AREA)
- Actuator (AREA)
Description
【考案の詳細な説明】
この考案は、伸長及び縮小ストローク端で高圧側の油室
から油圧をアンロードする油圧アンロード機構を設けで
あるタイプの複動型油圧シリンダに、関するものである
。[Detailed Description of the Invention] This invention relates to a type of double-acting hydraulic cylinder that is provided with a hydraulic unloading mechanism that unloads hydraulic pressure from a high-pressure side oil chamber at the ends of an extension and contraction stroke.
上記のような油圧アンロード機構を設けである複動型油
圧シリンダは、ストローク端で上記のような油圧アンロ
ードにより作動油の温度上昇及びポンプ負荷の増大を避
けさせるものと、なっている。A double-acting hydraulic cylinder equipped with the above-mentioned hydraulic unloading mechanism is designed to avoid an increase in the temperature of the hydraulic oil and an increase in the pump load by the above-mentioned hydraulic unloading at the end of the stroke.
この考案の目的とするところは、上記タイプの複動型油
圧シリンダであって、その油圧アンロード機構の構造を
極限にまで簡単化しである、新規な複動型油圧シリンダ
を、提供するにある。The purpose of this invention is to provide a new double-acting hydraulic cylinder of the type described above, in which the structure of the hydraulic unloading mechanism is simplified to the utmost. .
図示の実施例について、この考案に係る複動型油圧シリ
ンダの構成を説明すると、図において１はシリンダ本体
であって、このシリンダ本体１内には、ピストン・ピス
トンロッド２を、ピストン部３でもって油密に嵌合させ
ピストンロッド部４をシリンダ本体１外へと延出させて
、設けである。Regarding the illustrated embodiment, the structure of the double-acting hydraulic cylinder according to the invention will be explained. In the figure, 1 is a cylinder body, and inside this cylinder body 1, a piston and a piston rod 2 are connected to a piston part 3. Thus, the piston rod portion 4 is fitted in an oil-tight manner, and the piston rod portion 4 is extended outside the cylinder body 1.
シリンダ本体１内は、図示複動型油圧シリンダの伸縮動
に伴ない容積を変更される前進作用油室５と縮小作用油
室６とが、ピストン部３により両底されており、シリン
ダ本体１の基端部と先端部とにはそれぞれ、伸長作用油
室５に開口する油給排ポート７及び縮小作用油室６に開
口する油給排ポート８を、形威しである。Inside the cylinder body 1, a forward working oil chamber 5 and a contracting working oil chamber 6, whose volumes are changed as the double-acting hydraulic cylinder shown in the figure expands and contracts, are located at both bottoms by the piston portion 3. An oil supply/discharge port 7 opening into the expansion oil chamber 5 and an oil supply/discharge port 8 opening into the contraction oil chamber 6 are provided at the base end and the distal end, respectively.
以上の構成は通例の通りであるが、特に、ピストン・ピ
ストンロッド２には、伸長作用油室５に開口すると共に
ピストン部３の先端近くで該ピストン部３の周面に開口
する第１の油通路９と、縮小作用油室６に開口すると共
にピストン部３の基端近くで該ピストン部３の周面に開
口する第２の油通路１０とを、それぞれ設けである。The above configuration is as usual, but in particular, the piston/piston rod 2 has a first opening that opens into the extension oil chamber 5 and opens into the circumferential surface of the piston section 3 near the tip of the piston section 3. An oil passage 9 and a second oil passage 10 which opens into the reduction oil chamber 6 and opens onto the peripheral surface of the piston part 3 near the base end of the piston part 3 are provided.
そしてシリンダ本体１の内周面には、先端部と基端部と
において前記油給排ポート８，７に連らなる第１及び第
２の環状の溝穴１１．１２を、それぞれ形戒してあり、
ピストン部３がシリンダ本体１内の最前端に位置せしめ
られるシリンダ伸長ストローク端では、鎖線図示のよう
に第１の油通路９のピストン部３周面への開口端９ａが
第１の溝穴１１へと開口して油給排ポート８へと連通せ
しめられ、逆にピストン部３がシリンダ本体１内の最基
端に位置せしめられるシリンダ縮小ストローク端では、
鎖線図示のように第２の油通路１０のピストン部３周面
への開口端１０ａが第２の溝穴１２へと開口して油給排
ポート７へと連通せしめられるように、なされている。The inner circumferential surface of the cylinder body 1 is provided with first and second annular slots 11 and 12 that are connected to the oil supply and discharge ports 8 and 7 at the tip and base ends, respectively. There is,
At the cylinder extension stroke end where the piston part 3 is positioned at the frontmost end in the cylinder body 1, the opening end 9a of the first oil passage 9 to the circumferential surface of the piston part 3 is connected to the first slot 11 as shown by the chain line. At the end of the cylinder contraction stroke where the piston part 3 is located at the most proximal end within the cylinder body 1,
As shown by the chain line, the opening end 10a of the second oil passage 10 toward the circumferential surface of the piston portion 3 opens into the second slot 12 and communicates with the oil supply and discharge port 7. .
図において１３．１４．１５はそれぞれ、前進作用油室
５と縮小作用油室６間の油シールを行なわせるべくピス
トン部３周面に適宜に配して装着したＯリングである。In the figure, O-rings 13, 14, and 15 are appropriately arranged and attached to the circumferential surface of the piston portion 3 to provide an oil seal between the forward working oil chamber 5 and the reducing working oil chamber 6, respectively.
この考案に係る図示の複動型油圧シリンダは、上記のよ
うに構成されているから、常時は、各油通路９，１０の
前記開口端９ａ、１０ａがシリンダ本体１の内周面によ
りブロックされて、各油通路９，１０を介しての伸長作
用油室５と縮小作用油室６間の連通が遮断され、一方の
給排ポート７或は８から一方の作用油室５或は６への油
圧を供給し他方の作用油室６或は７から他方の給排ポー
ト８或は７を介し作動油をドレーンさせることで、通例
のように伸長或は縮小動作が得られる。Since the illustrated double-acting hydraulic cylinder according to this invention is constructed as described above, the opening ends 9a and 10a of each oil passage 9 and 10 are normally blocked by the inner circumferential surface of the cylinder body 1. Thus, the communication between the expansion oil chamber 5 and the contraction oil chamber 6 via the respective oil passages 9 and 10 is cut off, and one supply/discharge port 7 or 8 is connected to the other operation oil chamber 5 or 6. By supplying a hydraulic pressure of 1 and draining the hydraulic oil from the other working oil chamber 6 or 7 through the other supply/discharge port 8 or 7, an expansion or contraction operation can be obtained as usual.
そして、油圧シリンダの伸長ストローク端では、高圧側
の伸長作用油室５の油圧が、第１の油通路９及び第１の
溝穴１１を介して油給排ポート８へとアンロードされ、
逆に縮小ストローク端では、高圧側の縮小作用油室６の
油圧が、第２の油通路１０及び第２の溝穴１２を介して
油給排ポート７へとアンロードされて、各ストローク端
での作動油の温度上昇とそれに伴なう早期の劣化及び油
圧シリンダへの給油用油圧ポンプの負荷増大による動力
損失が、避けられる。At the end of the extension stroke of the hydraulic cylinder, the hydraulic pressure in the extension oil chamber 5 on the high pressure side is unloaded to the oil supply/discharge port 8 via the first oil passage 9 and the first slot 11.
Conversely, at the end of the reduction stroke, the hydraulic pressure in the reduction oil chamber 6 on the high pressure side is unloaded to the oil supply and discharge port 7 via the second oil passage 10 and the second slot 12, This prevents a temperature rise in the hydraulic oil and its accompanying early deterioration, as well as power loss due to an increased load on the hydraulic pump for supplying oil to the hydraulic cylinder.
以上のように、この考案の複動型油圧シリンダは、ピス
トン・ピストンロッド２に設けた１対の油通路９，１０
とシリンダ本体１の内周面に設けた１対の溝穴１１．１
２とでもって、各ストローク端で高圧側油室からの油圧
アンロードを行なわせる油圧アンロード機構を構成設置
してなるものであって、シリンダストローク端での作動
油の温度上昇及びポンプ負荷の増大を避けさせる油圧ア
ンロード機構の構造を、いわば極限にまで簡単化したも
のとなっている。As described above, the double-acting hydraulic cylinder of this invention has a pair of oil passages 9 and 10 provided in the piston and piston rod 2.
and a pair of slots 11.1 provided on the inner peripheral surface of the cylinder body 1.
2, a hydraulic unloading mechanism is installed to perform hydraulic unloading from the high-pressure side oil chamber at each stroke end, and the hydraulic unloading mechanism is configured and installed to perform hydraulic unloading from the high-pressure oil chamber at each stroke end. The structure of the hydraulic unloading mechanism that avoids the increase in size has been simplified to the utmost.
図は、この考案の一実施例を示す概略縦縦断側面図であ
る。
１・・・・・・シリンダ本体、２・・・・・ピストン・
ピストンロッド、３・・・・・ピストン部、４・・・・
・ピストンロッド部、５・・・・・・伸長作用油室、６
・・・・・・縮小作用油室、７，８・・・・・・油給排
ポート、９・・・・・・第１の油通路、９ａ・・・・・
・開口端、１０・・・・・・第２の油通路、１０ａ・・
・・・・開口端、１１・・・・・・第１の溝穴、１２・
・・・・・第２の溝穴。The figure is a schematic longitudinal sectional side view showing an embodiment of this invention. 1...Cylinder body, 2...Piston...
Piston rod, 3...Piston part, 4...
・Piston rod part, 5... Extension oil chamber, 6
...Reduction oil chamber, 7, 8...Oil supply/drain port, 9...First oil passage, 9a...
・Opening end, 10...Second oil passage, 10a...
...Opening end, 11...First slot, 12.
...Second slot.
Claims (1)
と共にピストン部の先端近くで該ピストン部の周面に開
口する第１の油通路と、縮小作用油室に開口すると共に
ピストン部の基端近くで該ピストン部の周面に開口する
第２の油通路とを、それぞれ設けると共に、シリンダ本
体の内周面に、シリンダ伸長ストローク端で上記第１の
油通路のピストン部周面への開口端を縮小作用油室用の
油給排ポートへと連通させる第１の溝穴と、シリンダ縮
小ストローク端で上記第２の油通路のピストン部周面へ
の開口端を伸長作用油室用の油給排ポートへと連通させ
る第２の溝穴とを、それぞれ設けたことを、特徴として
なる複動型油圧シリンダ。The piston/piston rod includes a first oil passage that opens into the expansion oil chamber and opens to the circumferential surface of the piston near the tip of the piston, and a first oil passage that opens into the contraction oil chamber and near the base end of the piston. and a second oil passage that opens on the circumferential surface of the piston part, and an opening end of the first oil passage to the circumferential surface of the piston part at the end of the cylinder extension stroke on the inner circumferential surface of the cylinder body. a first slot that communicates with the oil supply/discharge port for the contraction oil chamber, and an opening end of the second oil passage toward the circumferential surface of the piston at the end of the cylinder contraction stroke that connects the oil passage for the extension oil chamber. A double-acting hydraulic cylinder characterized by being provided with a second slot that communicates with a supply/discharge port.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1980024699U JPS609442Y2 (en) | 1980-02-26 | 1980-02-26 | Double acting hydraulic cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1980024699U JPS609442Y2 (en) | 1980-02-26 | 1980-02-26 | Double acting hydraulic cylinder |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS56125506U JPS56125506U (en) | 1981-09-24 |
| JPS609442Y2 true JPS609442Y2 (en) | 1985-04-03 |
Family
ID=29620766
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1980024699U Expired JPS609442Y2 (en) | 1980-02-26 | 1980-02-26 | Double acting hydraulic cylinder |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS609442Y2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5920573B2 (en) * | 2012-05-29 | 2016-05-18 | 宇部興産機械株式会社 | Vertical crusher |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5125672U (en) * | 1974-08-16 | 1976-02-25 | ||
| JPS5254719U (en) * | 1975-10-17 | 1977-04-20 |
-
1980
- 1980-02-26 JP JP1980024699U patent/JPS609442Y2/en not_active Expired
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5125672U (en) * | 1974-08-16 | 1976-02-25 | ||
| JPS5254719U (en) * | 1975-10-17 | 1977-04-20 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS56125506U (en) | 1981-09-24 |
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