CN102788061A - Low-flow fast movable cylinder - Google Patents

Low-flow fast movable cylinder Download PDF

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Publication number
CN102788061A
CN102788061A CN2012103143879A CN201210314387A CN102788061A CN 102788061 A CN102788061 A CN 102788061A CN 2012103143879 A CN2012103143879 A CN 2012103143879A CN 201210314387 A CN201210314387 A CN 201210314387A CN 102788061 A CN102788061 A CN 102788061A
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CN
China
Prior art keywords
piston
piston rod
shoe cream
plunger
cream room
Prior art date
Application number
CN2012103143879A
Other languages
Chinese (zh)
Inventor
冯起赠
刘晓林
和国磊
许本冲
宋志斌
王年友
Original Assignee
中国地质科学院勘探技术研究所
地质矿产廊坊聚力岩土工程科技开发公司
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 by 中国地质科学院勘探技术研究所, 地质矿产廊坊聚力岩土工程科技开发公司 filed Critical 中国地质科学院勘探技术研究所
Priority to CN2012103143879A priority Critical patent/CN102788061A/en
Publication of CN102788061A publication Critical patent/CN102788061A/en

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Abstract

The invention discloses a low-flow fast movable cylinder which comprises a cylinder barrel, a piston, a piston rod and a plunger. Both the piston rod and the plunger are hollow, an inner cavity of the cylinder barrel is divided into a first oil storage cavity and a second oil storage cavity by the piston, one end of the piston rod is fixedly connected with a side surface of the piston, and the other end of the piston rod is connected with a side wall of the first oil storage cavity in a sliding fit manner; one end of the plunger is fixedly connected with a side wall of the second oil storage cavity, the other end of the plunger is connected with the piston in a sliding fit manner and extends into a hollow cavity of the piston rod, an opening is arranged on the plunger, a hollow cavity of the plunger is communicated with the hollow cavity of the piston rod via the opening, so that a third oil cavity is formed between the piston rod and the plunger; and a third oil port, a second oil port and a first oil port which are respectively communicated with the hollow cavity of the plunger, the second oil storage cavity and the first oil storage cavity are arranged on the wall of the cylinder barrel. By the aid of the cylinder, oil cylinders with equal speeds and oil cylinders with different speeds can be switched mutually, flow of the cylinders with the equal speeds and flow of the cylinders with different speeds in a hydraulic system are matched, and the low-flow fast movable cylinder can be applied to working places with requirements on high-speed movement and high thrust.

Description

A kind of small flow fast moving oil cylinder
Technical field
The present invention relates to a kind of oil cylinder, relate in particular to a kind of small flow fast moving oil cylinder.
Background technique
The common problem that exists of normally used oil cylinder is: on the one hand, when the oil cylinder cylinder diameter is big, need bigger flow to realize the fast moving oil cylinder; Thereby need be than the oil pump feed of big flow; This will cause deployment cost high, and pipeline is complicated, and need to increase switching circuit; On the other hand, at capacity rating one regularly, oil cylinder can't be realized the switching of multiple travelling speed through changing oil circuit.
For example; Date of publication is on September 14th, 2011, and publication No. is that the Chinese invention patent application of CN102182720A discloses a kind of double speed oil cylinder, though this double speed oil cylinder is realized the change of thrust through the compression area of the different sizes of moving piston rod and big piston; Can when using less compression area, make again oil cylinder push away speed and retraction speed fast; But the structure more complicated of this double speed oil cylinder is not easy to processing, and structure being set can knowing according to its oil circuit; This double speed oil cylinder one end hydraulic fluid port is connected with fuel tank; The oil return reservoir vessel that mainly act as active chamber of fuel tank, bearing capacity is less than 1MPA, so the oil circuit that is connected with fuel tank can only bear the working pressure less than 1MPA.In addition, the design of the hydraulic fluid port passage of this kind double speed oil cylinder can't realize in mutual conversion and the hydraulic system between constant speed, the differential oil cylinder problem of flow matches in constant speed, the differential oil cylinder.
Summary of the invention
The small flow fast moving oil cylinder that one object of the present invention is that a kind of oil cylinder realized switching of structure is provided and under big cylinder diameter situation, can realizes the small flow fast moving.
The technological scheme that the present invention adopts is: a kind of small flow fast moving oil cylinder comprises the piston rod of cylinder barrel, piston, hollow and the plunger of hollow; The inwall sealed mode sliding connection of said piston and cylinder barrel is divided into first and second shoe cream rooms with the inner chamber of cylinder barrel; One end of said piston rod is fixedly connected with the side of formation first shoe cream room of piston, and the other end is as the sidewall sealed mode sliding connection relative with piston of the output terminal and first shoe cream room; One end of said plunger is fixedly connected with the sidewall relative with piston of second shoe cream room; The other end and the sliding connection of piston sealed mode; And stretch in the hollow cavity of said piston rod; Said plunger is provided with the opening that the hollow cavity that makes plunger communicates with the hollow cavity of piston rod, between piston rod and plunger, to form the 3rd shoe cream room; The barrel of said cylinder barrel is provided with the 3rd hydraulic fluid port that communicates with the hollow cavity of plunger, second hydraulic fluid port that communicates with second shoe cream room, and first hydraulic fluid port that communicates with first shoe cream room.
Wherein, the sectional area of the said plunger sectional area that equals piston deducts the sectional area of piston rod.
The small flow fast moving oil cylinder that another object of the present invention is that the oil cylinder the realized switching of another kind of structure is provided and under big cylinder diameter situation, can realizes the small flow fast moving.
The technological scheme that the present invention adopts is: a kind of small flow fast moving oil cylinder comprises the piston rod of cylinder barrel, piston, hollow and the plunger of hollow; The inwall sealed mode sliding connection of said piston and cylinder barrel is divided into first and second shoe cream rooms with the inner chamber of cylinder barrel; One end of said piston rod is fixedly connected with the side of formation first shoe cream room of piston, the sidewall sealed mode sliding connection relative of the other end and first shoe cream room with piston, and protruding through cylinder barrel; One end of said plunger is fixedly connected with the sidewall relative with piston of second shoe cream room, the other end and the sliding connection of piston sealed mode, and stretch in the hollow cavity of said piston rod, between piston rod and plunger, to form the 3rd shoe cream room; Said piston rod is provided with the 3rd hydraulic fluid port that communicates with the 3rd shoe cream room through the outwardly directed end of cylinder barrel; Be provided with respectively first oil circuit that communicates with first shoe cream room through piston rod and second oil circuit that communicates with second shoe cream room through piston in said the 3rd shoe cream room, said first and second oil circuits form first and second hydraulic fluid ports at said piston rod respectively on the outwardly directed end of cylinder barrel.
Wherein, the sectional area of the said plunger sectional area that equals piston deducts the sectional area of piston rod.
Beneficial effect of the present invention is: small flow fast moving oil cylinder of the present invention has mainly solved the problem of changing each other at work between constant speed, the differential oil cylinder; Solved in the hydraulic system matching problem of flow in constant speed, the differential oil cylinder, it can be applicable to the various high-speed motion various operating modes places of the big release power of needs again that promptly need.The main feature of small flow fast moving oil cylinder of the present invention is:
1, small flow fast moving cylinder structure of the present invention is simple; Do not have attached devices such as attached fuel tank, Fill valve and sequence valve, in addition, because low pressure oil storage fuel tank is not set; The structural type of oil cylinder can design by high-voltage oil cylinder, and each active chamber all can bear the above hydraulic pressure of 35MPA.
2, small flow fast moving oil cylinder of the present invention can be used as constant speed oil cylinder, common differential oil cylinder and annular cylinder use;
3, small flow fast moving oil cylinder of the present invention is provided with three hydraulic fluid port passages, can realize the conversion of above-mentioned three kinds of oil cylinders smoothly through the switching of oil circuit;
4, being full of fluid in the 3rd shoe cream room of oil cylinder does not contact with air.
Description of drawings
Fig. 1 is a kind of sectional view of implementing structure according to small flow fast moving oil cylinder of the present invention;
Fig. 2 is a sectional view of implementing structure according to the another kind of small flow fast moving oil cylinder of the present invention.
Embodiment
As shown in Figure 1, small flow fast moving oil cylinder of the present invention comprises the piston rod 4 of cylinder barrel 2, piston 1, hollow and the plunger 5 of hollow; The inwall sealed mode sliding connection of piston 1 and cylinder barrel 2; The inner chamber of cylinder barrel 2 is divided into the first shoe cream room c and the second shoe cream room b; The volume that it will be clear to one skilled in the art that first and second shoe cream rooms will change along with the relative movement between piston and cylinder barrel; One end of piston rod 4 is fixedly connected with the side of the formation first shoe cream room c of piston 1, and the other end is as the sidewall sealed mode sliding connection relative with piston 1 of the output terminal and the first shoe cream room c; One end of plunger 5 is fixedly connected with piston 1 relative sidewall with the second shoe cream room b's; The other end and the sliding connection of piston sealed mode; And stretch in the hollow cavity of piston rod 4; Plunger 5 is provided with the opening that the hollow cavity that makes plunger communicates with the hollow cavity of piston rod 4, between piston rod 4 and plunger 5, to form the 3rd shoe cream room a, i.e. ring-type shoe cream room between the two; The barrel of cylinder barrel 2 is provided with the 3rd hydraulic fluid port A that communicates with the hollow cavity of plunger 5, the second hydraulic fluid port B that communicates with the second shoe cream room b, and the first hydraulic fluid port C that communicates with the first shoe cream room c.
It is fixed fixed with piston rod oil cylinder to be divided into cylinder barrel according to the mode of installing and fixing of oil cylinder; Small flow fast moving oil cylinder shown in Fig. 1 is the fixed oil cylinder of cylinder barrel, below the fixed small flow fast moving of another kind of piston rod oil cylinder will be provided under a total inventive concept.Cylinder barrel of the present invention is fixed to be the design of hydraulic fluid port with the main distinction fixed small flow fast moving of piston rod oil cylinder, and general structure is basic identical.
As shown in Figure 2, the fixed small flow fast moving of piston rod oil cylinder comprises the piston rod 4 of cylinder barrel 2, piston 1, hollow and the plunger 5 of hollow; The inwall sealed mode sliding connection of piston 1 and cylinder barrel 2 is divided into the first shoe cream room c and the second shoe cream room b with the inner chamber of cylinder barrel 2; One end of piston rod 4 is fixedly connected with the side of the formation first shoe cream room c of piston 1, the sidewall sealed mode sliding connection relative of the other end and the first shoe cream room c with piston 1, and protruding through cylinder barrel 2, to fixedly mount; One end of plunger 5 is fixedly connected with piston 1 relative sidewall with the second shoe cream room b's, the other end and piston 1 sealed mode sliding connection, and stretch in the hollow cavity of said piston rod 4, between piston rod 4 and plunger 5, to form the 3rd shoe cream room a; Piston rod 4 is provided with the 3rd hydraulic fluid port A that communicates with the 3rd shoe cream room a through cylinder barrel 2 outwardly directed ends; Be provided with respectively first oil circuit that communicates with the first shoe cream room c through piston rod 4 and second oil circuit that communicates with the second shoe cream room b through piston 1 in the 3rd shoe cream room a, first and second oil circuits form the first hydraulic fluid port C and the second hydraulic fluid port B at piston rod 4 respectively on cylinder barrel 2 outwardly directed ends.In the embodiment shown in Figure 2; The two ends of first oil circuit and second oil circuit are supported on piston rod 4 and the piston 1 respectively; First oil circuit leads to the first shoe cream room c through piston rod 4 on the position between the two ends, and the end that second oil circuit is supported on the piston 1 directly leads to the second shoe cream room b.
In the present invention; But the sealed type sliding connection is between two mentioned objects and is slidingly matched to relative movement; And utilize the Sealing 3 shown in Fig. 1 and 2 to seal on the fitting surface, make fluid can not flow into another chamber from a chamber basically, generally through the fitting surface between the two; Sealing between piston and another counterpart is arranged on the piston; And the Sealing between piston rod and chamber wall is arranged on the wall of chamber, and this is the basic demand to oil cylinder, and the present invention does not remake further qualification to this.
The attainable function of small flow fast moving oil cylinder of the present invention is following:
When the 3rd shoe cream room a passes through the 3rd hydraulic fluid port A oil-feed; Under pressure, piston rod 4 or cylinder barrel 2 stretch out, and stretch out the sectional area calculating of speed according to plunger 5; And the sectional area of plunger is less, only needs can realize faster stretching out of piston rod 4 or cylinder barrel 2 than the small flow oil-feed; When the first hydraulic fluid port C oil-feed of first shoe cream room c warp; Piston rod 4 or cylinder barrel 2 indentations of this moment; Indentation speed is calculated (being the long-pending piston rod sectional area that deducts of piston cross-section) according to the annular cross-sectional area of piston 1; This area is less, only needs can realize than the small flow oil-feed the faster indentation of piston rod 4 or cylinder barrel 2.
Small flow fast moving oil cylinder of the present invention can be used as common differential cylinder as the oil cylinder that has only a rod and uses, and with the profile of common oil cylinder, install as broad as long; In addition; Because the employing of plunger 5 and piston rod 4 has changed the area of oil pressure effect; The sectional area of plunger 5 is equated with the annular cross-sectional area of piston 1, and the oil-feed flow of the 3rd hydraulic fluid port A equates with the fuel-displaced flow of the first hydraulic fluid port C, therefore; Also can be used as the use of constant speed oil cylinder even small flow fast moving oil cylinder of the present invention only has a rod, and reduced installing space; Moreover small flow fast moving oil cylinder of the present invention can be used as annular cylinder and uses.
In addition, small flow fast moving oil cylinder of the present invention can realize that through changing inlet and outlet of fuel channel three kinds of differences of this oil cylinder stretch out the switching of speed:
First kind: the 3rd shoe cream room a oil-feed, the second shoe cream room b repairing, the first shoe cream room c oil return;
Second kind: the 3rd shoe cream room a repairing, the second shoe cream room b oil-feed, the first shoe cream room c oil return;
The third: the oil-feed simultaneously of the 3rd shoe cream room a and the second shoe cream room b chamber, the first shoe cream room c chamber oil return.
When making small flow fast moving oil cylinder of the present invention, those skilled in the art can be according to the required speed of stretching out, and the sectional area of adjustment corresponding construction is to obtain required speed.
The above is merely preferred implementation of the present invention, is not to be used for limiting practical range of the present invention, and the equivalence of in protection scope of the present invention, being done in every case changes and modifies, and all should think to have fallen in protection scope of the present invention.

Claims (4)

1. a small flow fast moving oil cylinder is characterized in that: comprise the piston rod of cylinder barrel, piston, hollow and the plunger of hollow; The inwall sealed mode sliding connection of said piston and cylinder barrel is divided into first and second shoe cream rooms with the inner chamber of cylinder barrel; One end of said piston rod is fixedly connected with the side of formation first shoe cream room of piston, and the other end is as the sidewall sealed mode sliding connection relative with piston of the output terminal and first shoe cream room; One end of said plunger is fixedly connected with the sidewall relative with piston of second shoe cream room; The other end and the sliding connection of piston sealed mode; And stretch in the hollow cavity of said piston rod; Said plunger is provided with the opening that the hollow cavity that makes plunger communicates with the hollow cavity of piston rod, between piston rod and plunger, to form the 3rd shoe cream room; The barrel of said cylinder barrel is provided with the 3rd hydraulic fluid port that communicates with the hollow cavity of plunger, second hydraulic fluid port that communicates with second shoe cream room, and first hydraulic fluid port that communicates with first shoe cream room.
2. small flow fast moving oil cylinder according to claim 1 is characterized in that: the sectional area that the sectional area of said plunger equals piston deducts the sectional area of piston rod.
3. a small flow fast moving oil cylinder is characterized in that: comprise the piston rod of cylinder barrel, piston, hollow and the plunger of hollow; The inwall sealed mode sliding connection of said piston and cylinder barrel is divided into first and second shoe cream rooms with the inner chamber of cylinder barrel; One end of said piston rod is fixedly connected with the side of formation first shoe cream room of piston, the sidewall sealed mode sliding connection relative of the other end and first shoe cream room with piston, and protruding through cylinder barrel; One end of said plunger is fixedly connected with the sidewall relative with piston of second shoe cream room, the other end and the sliding connection of piston sealed mode, and stretch in the hollow cavity of said piston rod, between piston rod and plunger, to form the 3rd shoe cream room; Said piston rod is provided with the 3rd hydraulic fluid port that communicates with the 3rd shoe cream room through the outwardly directed end of cylinder barrel; Be provided with respectively first oil circuit that communicates with first shoe cream room through piston rod and second oil circuit that communicates with second shoe cream room through piston in said the 3rd shoe cream room, said first and second oil circuits form first and second hydraulic fluid ports at said piston rod respectively on the outwardly directed end of cylinder barrel.
4. small flow fast moving oil cylinder according to claim 3 is characterized in that: the sectional area that the sectional area of said plunger equals piston deducts the sectional area of piston rod.
CN2012103143879A 2012-08-30 2012-08-30 Low-flow fast movable cylinder CN102788061A (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103148051A (en) * 2013-03-25 2013-06-12 长沙中联消防机械有限公司 Hydraulic cylinder, hydraulic cylinder control system containing hydraulic cylinder, and engineering machinery
CN103671338A (en) * 2013-12-16 2014-03-26 江苏百协精锻机床有限公司 Constant-speed plunger oil cylinder
CN106640834A (en) * 2016-12-30 2017-05-10 徐州重型机械有限公司 Hydraulic cylinder, hydraulic system and crane
CN107165887A (en) * 2017-07-07 2017-09-15 徐州徐工液压件有限公司 A kind of oil storage hydraulic cylinder
CN108591165A (en) * 2018-05-15 2018-09-28 四川长江液压天成机械有限公司 A kind of compact dual-rod hydraulic cylinder

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CN1043365A (en) * 1988-12-14 1990-06-27 北京矿务局机械设计研究所 The combined oil cylinder that is used for support apparatus in coal mine
DE10222914A1 (en) * 2002-05-24 2003-12-04 Matthias Schum Actuator cylinder for lifting loads using pneumatic or hydraulic pressure has two concentric cylinders with pistons moving in opposite directions to extend piston rods
CN1526960A (en) * 2003-09-25 2004-09-08 浙江大学 Single rod equal area double acting hydraulic cylinder capable of balancing weight
CN2700624Y (en) * 2003-11-29 2005-05-18 浙江大学 Single rod symmetrical hydraulic cylinder with built-in displacement sensor
CN2740825Y (en) * 2004-10-25 2005-11-16 李玉冀 Speed-changing hydraulic cylinder
CN1877139A (en) * 2005-09-12 2006-12-13 叶孙勇 Leakless combined oil cylinder
CN101893016A (en) * 2010-07-20 2010-11-24 王思聪 Combined bidirectional long-stroke push-and-pull hydraulic cylinder
CN201916277U (en) * 2010-12-20 2011-08-03 长治清华机械厂 Cylinder
CN202946472U (en) * 2012-08-30 2013-05-22 中国地质科学院勘探技术研究所 Small-flow fast-moving oil cylinder

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1043365A (en) * 1988-12-14 1990-06-27 北京矿务局机械设计研究所 The combined oil cylinder that is used for support apparatus in coal mine
DE10222914A1 (en) * 2002-05-24 2003-12-04 Matthias Schum Actuator cylinder for lifting loads using pneumatic or hydraulic pressure has two concentric cylinders with pistons moving in opposite directions to extend piston rods
CN1526960A (en) * 2003-09-25 2004-09-08 浙江大学 Single rod equal area double acting hydraulic cylinder capable of balancing weight
CN2700624Y (en) * 2003-11-29 2005-05-18 浙江大学 Single rod symmetrical hydraulic cylinder with built-in displacement sensor
CN2740825Y (en) * 2004-10-25 2005-11-16 李玉冀 Speed-changing hydraulic cylinder
CN1877139A (en) * 2005-09-12 2006-12-13 叶孙勇 Leakless combined oil cylinder
CN101893016A (en) * 2010-07-20 2010-11-24 王思聪 Combined bidirectional long-stroke push-and-pull hydraulic cylinder
CN201916277U (en) * 2010-12-20 2011-08-03 长治清华机械厂 Cylinder
CN202946472U (en) * 2012-08-30 2013-05-22 中国地质科学院勘探技术研究所 Small-flow fast-moving oil cylinder

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103148051A (en) * 2013-03-25 2013-06-12 长沙中联消防机械有限公司 Hydraulic cylinder, hydraulic cylinder control system containing hydraulic cylinder, and engineering machinery
CN103148051B (en) * 2013-03-25 2016-03-30 长沙中联消防机械有限公司 Hydraulic jack, comprise its hydraulic jack control system, engineering machinery
CN103671338A (en) * 2013-12-16 2014-03-26 江苏百协精锻机床有限公司 Constant-speed plunger oil cylinder
CN106640834A (en) * 2016-12-30 2017-05-10 徐州重型机械有限公司 Hydraulic cylinder, hydraulic system and crane
CN106640834B (en) * 2016-12-30 2018-10-02 徐州重型机械有限公司 Hydraulic cylinder, hydraulic system and crane
CN107165887A (en) * 2017-07-07 2017-09-15 徐州徐工液压件有限公司 A kind of oil storage hydraulic cylinder
CN108591165A (en) * 2018-05-15 2018-09-28 四川长江液压天成机械有限公司 A kind of compact dual-rod hydraulic cylinder

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Application publication date: 20121121