CN2661989Y - Self-locking hydraulic cylinder - Google Patents

Self-locking hydraulic cylinder Download PDF

Info

Publication number
CN2661989Y
CN2661989Y CN 200320122228 CN200320122228U CN2661989Y CN 2661989 Y CN2661989 Y CN 2661989Y CN 200320122228 CN200320122228 CN 200320122228 CN 200320122228 U CN200320122228 U CN 200320122228U CN 2661989 Y CN2661989 Y CN 2661989Y
Authority
CN
China
Prior art keywords
cylinder
sleeve
piston rod
thin
walled sleeve
Prior art date
Application number
CN 200320122228
Other languages
Chinese (zh)
Inventor
黄孙灼
林述温
Original Assignee
福州大学
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 福州大学 filed Critical 福州大学
Priority to CN 200320122228 priority Critical patent/CN2661989Y/en
Application granted granted Critical
Publication of CN2661989Y publication Critical patent/CN2661989Y/en

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Abstract

The utility model relates to a self-locking hydraulic cylinder, comprising a cylinder body, a piston, a piston rod, a cylinder cover and a cylinder bottom. The utility model is characterized in also comprising an elastic thin-walled sleeve and the front and the rear guide sleeves; wherein, the elastic thin-walled sleeve is matched sleeved on the outer surface of the piston rod; the front and the rear guide sleeves are sleeved at both ends of the elastic thin-walled sleeve. A seal ring is arranged at the contact bedding between the both ends of the thin-walled sleeve and the cylinder body, and the contacts of the thin-walled sleeve and the front and rear sleeves at the both ends. Thereby, a closed volume can be formed between the thin-walled sleeve and the inner surface of the cylinder. When the pressure oil is inlet in the closed volume, the thin-walled sleeve can produce elastic deformation under the function of pressure oil and hold and lock the piston rod. The utility model can maintain the piston rod to stop at the arbitrary position required in the working stroke while bearing loads. At the same time, the integral whole dynamic stiffness and precision of the hydraulic cylinder is improved through the coordination with the front and rear guide sleeves. The utility model has the advantages of simple structure, easy manufacturing and assembling operations, convenient maintenance, high reliability and long service life.

Description

The self-locking oil hydraulic cylinder
Technical field:
The utility model relates to a kind of improvement technology of hydraulic cylinder structure, and particularly a kind of improved self-locking oil hydraulic cylinder can be used as the locking control unit purposes center shaft purposes of shoe tree working machine tool main shaft (as can be used as) of various tail stock for machine tool center shafts.
Technical background:
Existing self-locking oil hydraulic cylinder kind has two kinds, and a kind of is the lock sleeve latching ram bar that adopts the molybdenum metalloid to make, and one group of annular groove is arranged in the cover, when piston rod was motionless, this cover was held piston rod tightly pinning, when to the oil hydraulic cylinder fuel feeding, simultaneously oil is introduced lock sleeve, cover is expanded, unclamp piston rod.Another kind is the plastic hoop locking cylinder, and its lock sleeve can breathing, but twines a plastic hoop on piston rod, and plastic hoop tightly wraps on piston rod at ordinary times, plays the effect of lock jail, and behind feeding pressure oil, plastic hoop unclamps, and oil hydraulic cylinder is unblanked.Above-mentioned two kinds of self-locking oil hydraulic cylinders all exist manufacturability poor, make that difficulty, inconvenient maintenance, life-span are lacked, defectives such as precision and rigidity difference.
The model utility content
The purpose of this utility model is to overcome above-mentioned deficiency, thereby designs a kind of self-locking oil hydraulic cylinder of improvement type, make have easy to manufacture, easy to maintenance, reliability height, the characteristics that the life-span is long.
The utility model is realized with following technological scheme: it still comprises cylinder body, piston, piston rod, cylinder cap and cylinder bottom, it is characterized in that it comprises that also elastic thin-wall sleeve and front and back guide sleeve constitute, the elasticity book wall sleeve that wherein is positioned at inner chamber of cylinder block is to be set on the piston rod and to maintain certain clearance (being Spielpassung installs) with the outer surface of piston rod, described former and later two guide sleeves are the two ends that are installed in elasticity book wall sleeve, and at the two ends of elasticity book wall sleeve and the contact matching place between the cylinder body, and the contacting point between the front and back guide sleeve at elasticity book wall sleeve and its two ends all is equiped with seal ring in case leakage of oil, so that between book wall sleeve and inner surface of cylinder block, can form the volume of a sealing, with the corresponding cylinder body of this enclosed volume on offer the control port that can feed pressure oil, when feed pressure oil in enclosed volume after, resiliently deformable can take place to embrace piston rod (having locking effect) in book wall sleeve under the effect of pressure oil.
The utility model is because piston rod can be embraced locking, when oil hydraulic cylinder when bearing load, it is motionless to keep piston rod to be in the position of any requirement in its stroke, adds the effect of former and later two guide sleeves, has improved the overall dynamics rigidity and the precision of oil hydraulic cylinder.When the piston rod in the oil hydraulic cylinder need move, the control port of pressure oil on cylinder body in the enclosed volume is unloaded to fuel tank, and thin walled cylinder body loses the effect of hydraulic coupling, and resiliently deformable disappears, unclamp piston rod, piston rod can freely stretch to any position under the pressure oil effect of its end.Compared with the prior art, have simple in structurely, integral rigidity and precision further improve, and make and install easily, and be easy to maintenance, reliability height, characteristics such as the life-span is long.
Description of drawings:
Fig. 1 is a kind of integral installation distribution structure schematic representation of the present utility model.
Wherein: 1~cylinder cap, 2~preceding guide sleeve, 3~elasticity book wall sleeve, 4~back guide sleeve, 5~piston rod, 6~cylinder body, 7~piston, 8~cylinder bottom, 9~seal ring, 10~enclosed volume, 11~control port.
Embodiment:
Component such as the cylinder body in the utility model, piston, piston rod are still made with the common process method, but described book wall sleeve 3 must be with the high elastic material manufacturing of intensity (as making with the manganese steel that hardens).

Claims (2)

1, a kind of self-locking oil hydraulic cylinder, it comprises cylinder body (6), piston (7), piston rod (5), cylinder cap (1) and cylinder bottom (8), it is characterized in that this oil hydraulic cylinder also comprises elastic thin-wall sleeve (3) and front and back guide sleeve (2,4) constitute, the elasticity book wall sleeve (3) that wherein is positioned at inner chamber of cylinder block is to be the outer surface that Spielpassung is set in piston rod (5), wherein said former and later two guide sleeves (2,4) be the two ends that are installed in elasticity book wall sleeve (3), and at the two ends of elasticity book wall sleeve and the contact matching place between the cylinder body, and the contacting point between the front and back guide sleeve at elasticity book wall sleeve and its two ends all is equiped with leakproof oil seal circle (9), so that between book wall sleeve and inner surface of cylinder block, can form the volume (9) of a sealing, again with the corresponding cylinder body of this enclosed volume on offer the control port (11) that can feed pressure oil, when feed pressure oil in enclosed volume after, resiliently deformable can take place to embrace piston rod (5) in book wall sleeve (3) under the effect of pressure oil.
2, self-locking oil hydraulic cylinder according to claim 1 is characterized in that described elasticity book wall sleeve (3) is made with the high elastic material of intensity.
CN 200320122228 2003-12-05 2003-12-05 Self-locking hydraulic cylinder CN2661989Y (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 200320122228 CN2661989Y (en) 2003-12-05 2003-12-05 Self-locking hydraulic cylinder

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 200320122228 CN2661989Y (en) 2003-12-05 2003-12-05 Self-locking hydraulic cylinder

Publications (1)

Publication Number Publication Date
CN2661989Y true CN2661989Y (en) 2004-12-08

Family

ID=34348579

Family Applications (1)

Application Number Title Priority Date Filing Date
CN 200320122228 CN2661989Y (en) 2003-12-05 2003-12-05 Self-locking hydraulic cylinder

Country Status (1)

Country Link
CN (1) CN2661989Y (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101858371A (en) * 2010-05-25 2010-10-13 中航飞机起落架有限责任公司 Actuator cylinder with in-built manual-operated emergent unlocking device
CN103826704A (en) * 2011-10-06 2014-05-28 阿利安特技术系统公司 Liquid-augmented, generated-gas fire suppression systems and related methods
CN104454779A (en) * 2014-10-13 2015-03-25 长沙迪普机械科技有限公司 Linear actuator with locking mechanism
CN104551785A (en) * 2014-12-29 2015-04-29 苏州欧美克合金工具有限公司 Hydraulic locking device
CN105587712A (en) * 2014-10-23 2016-05-18 苏州市吴中区欣鑫开关配件厂 Relay guide ring
US9682259B2 (en) 2011-10-06 2017-06-20 Orbital Atk, Inc. Fire suppression systems and methods of suppressing a fire
CN107120334A (en) * 2017-07-13 2017-09-01 青岛黎马敦包装有限公司 Plunger case system is used in a kind of full-automatic platen gold blocking die-cutting machine motion platform regulation
US9919173B2 (en) 2003-12-02 2018-03-20 Orbital Atk, Inc. Man-rated fire suppression system and related methods

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9919173B2 (en) 2003-12-02 2018-03-20 Orbital Atk, Inc. Man-rated fire suppression system and related methods
CN101858371A (en) * 2010-05-25 2010-10-13 中航飞机起落架有限责任公司 Actuator cylinder with in-built manual-operated emergent unlocking device
CN101858371B (en) * 2010-05-25 2013-08-21 中航飞机起落架有限责任公司 Actuator cylinder with in-built manual-operated emergent unlocking device
CN103826704A (en) * 2011-10-06 2014-05-28 阿利安特技术系统公司 Liquid-augmented, generated-gas fire suppression systems and related methods
CN103826704B (en) * 2011-10-06 2016-10-12 阿利安特技术系统公司 The generation gas type fire extinguishing system of liquid strengthening and correlation technique
US9682259B2 (en) 2011-10-06 2017-06-20 Orbital Atk, Inc. Fire suppression systems and methods of suppressing a fire
CN104454779A (en) * 2014-10-13 2015-03-25 长沙迪普机械科技有限公司 Linear actuator with locking mechanism
CN104454779B (en) * 2014-10-13 2017-02-15 长沙迪普机械科技有限公司 Linear actuator with locking mechanism
CN105587712A (en) * 2014-10-23 2016-05-18 苏州市吴中区欣鑫开关配件厂 Relay guide ring
CN104551785A (en) * 2014-12-29 2015-04-29 苏州欧美克合金工具有限公司 Hydraulic locking device
CN107120334A (en) * 2017-07-13 2017-09-01 青岛黎马敦包装有限公司 Plunger case system is used in a kind of full-automatic platen gold blocking die-cutting machine motion platform regulation
CN107120334B (en) * 2017-07-13 2019-01-15 青岛黎马敦包装有限公司 A kind of full-automatic platen gold blocking die-cutting machine motion platform adjusting plunger case system

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Date Code Title Description
C14 Grant of patent or utility model
GR01 Patent grant
C17 Cessation of patent right
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20041208

Termination date: 20111205