CN202073863U - Differential pressure signaling structure for reversing of hydraulic cylinder - Google Patents

Differential pressure signaling structure for reversing of hydraulic cylinder Download PDF

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Publication number
CN202073863U
CN202073863U CN2011201363127U CN201120136312U CN202073863U CN 202073863 U CN202073863 U CN 202073863U CN 2011201363127 U CN2011201363127 U CN 2011201363127U CN 201120136312 U CN201120136312 U CN 201120136312U CN 202073863 U CN202073863 U CN 202073863U
Authority
CN
China
Prior art keywords
piston
oil duct
oil
hydraulic cylinder
differential pressure
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 - Fee Related
Application number
CN2011201363127U
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Chinese (zh)
Inventor
卫焱
邓锡
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SICHUAN BAIRUILONG MACHINERY EQUIPMENT CO LTD
Original Assignee
SICHUAN BAIRUILONG MACHINERY EQUIPMENT CO LTD
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 SICHUAN BAIRUILONG MACHINERY EQUIPMENT CO LTD filed Critical SICHUAN BAIRUILONG MACHINERY EQUIPMENT CO LTD
Priority to CN2011201363127U priority Critical patent/CN202073863U/en
Application granted granted Critical
Publication of CN202073863U publication Critical patent/CN202073863U/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Abstract

The utility model discloses a differential pressure signaling structure for reversing of a hydraulic cylinder, which comprises oil ducts A, B, C and D, a low-pressure piston, a piston rod, a throttling step, a valve block and a differential pressure signaling device, wherein the low-pressure piston is connected with the piston rod by a pressing plate; the throttling step is arranged on the piston rod; and the oil ducts C and D are communicated with the oil duct of the differential pressure signaling device through the valve block, and the pressure at two ends are equal. The differential pressure signaling structure is compact in structure, convenient to maintain, time-saving and labor-saving, can achieve smooth reversing effect, has no impact, and can better protect piston from being damaged as the piston does not move to the dead point.

Description

Oil hydraulic cylinder commutation pressure reduction sender structure
Technical field
The utility model relates to a kind of oil hydraulic cylinder reversing arrangement, particularly a kind of oil hydraulic cylinder commutation pressure reduction sender structure.
Background technique
The structure that oil hydraulic cylinder commutation is at present adopted all is basically in oil hydraulic cylinder, or stretches out the mechanical trip switch that push rod goes to collide the outside on the piston in the oil hydraulic cylinder; Perhaps stretch in the cylinder and in movement process, realize commutation with the inductive switching sender by piston or piston rod with contactless proximity switch, optoelectronic switch etc.; Be exactly with time relay or pressure commutation in addition.This type of commutating structure all exists common drawback: one, behind initial debugging or switch failure, piston all can move to the dead point, builds the pressure in the oil hydraulic cylinder, cause hydraulic valve piece to damage easily, commutate with the mechanical trip switch and stretch out push rod, the piston long-time running, outer rounded ends also will be broken by push rod; With time or pressure commutation, each commutation all will allow oil hydraulic cylinder reach system's rated pressure, and hydraulic system frequently is subjected to high pressure; Two, commutation process is swift and violent, not buffering; Three, engineering time long, maintenance is inconvenient, particularly the structure of design collision push rod on the piston in oil hydraulic cylinder or on the end cap in cylinder will all disassemble whole oil hydraulic cylinder just and can safeguard during maintenance.
Summary of the invention
The purpose of this utility model just is to provide the commutation of a kind of oil hydraulic cylinder with pressure reduction sender structure, can solve piston in the above-mentioned oil hydraulic cylinder commutation process fully and can move to that dead point, commutation are swift and violent does not have a problem that buffering, push rod easily break piston and inconvenient maintenance.
To achieve these goals, the technical solution adopted in the utility model is such: oil hydraulic cylinder commutation pressure reduction sender structure of the present utility model, comprise A oil duct, B oil duct, C oil duct, D oil duct, low pressure piston, piston rod, throttling step, valve piece and differential pressure transmitter device, described low pressure piston is connected with the piston rod presser type, described throttling step is arranged on the piston rod, described C oil duct and D oil duct communicate with the oil duct of described differential pressure transmitter device through the valve piece, and pressure at two ends equates.
As preferably, also comprise spring, steel ball seat and steel ball, described steel ball is arranged in the steel ball seat.
Compared with prior art, advantage of the present utility model is: one, utilize the interior oil return of oil hydraulic cylinder own to form pressure difference at the differential pressure transmitter device two ends and send commutation signal; Two, utilize two oil circuits generations of own oil return formation pressure reduction in the oil hydraulic cylinder; Three, utilize end cap or two oil circuits of high-pressure cylinder formation of oil hydraulic cylinder; Four, utilize piston rod or constitute buffering suface increasing body on the piston and on piston; Five, utilize the end cap or the high-pressure cylinder formation buffer cavity of oil hydraulic cylinder; Six, between differential pressure transmitter device and two oil circuits, install double check valve or Double throttle check valve structure additional; Seven, can supply the oil hydraulic cylinder and the used commutation of the pressurized cylinder pressure reduction sender structure of single-piston rod formula, double-piston rod-type.The utility model is easy to maintenance, time saving and energy saving, can reach the smooth-going effect of commutation, does not have impact again, and piston can not move to the dead point simultaneously, makes it can better protect piston, avoids impaired.
Description of drawings
Fig. 1 is a structural representation of the present utility model.
Embodiment
The utility model is described in further detail below in conjunction with accompanying drawing.
Referring to Fig. 1, oil hydraulic cylinder commutation pressure reduction sender structure of the present utility model, comprise A oil duct 1, B oil duct 2, C oil duct 3, D oil duct 4, low pressure piston 5, piston rod 6, throttling step 7, valve piece 8 and differential pressure transmitter device 9, described low pressure piston 5 is connected with piston rod 6 presser types, described throttling step 7 is arranged on the piston rod 6, described C oil duct 3 and D oil duct 4 communicate through the oil duct of valve piece 8 with described differential pressure transmitter device 9, and pressure at two ends equates, also comprise spring 16, steel ball seat 10 and steel ball 11, described steel ball 11 is arranged in the steel ball seat 10.
When A oil duct 1 promotes low pressure piston 5 drive piston rod 6 end motions left, 2 oil returns of B oil duct, C oil duct 3 and D oil duct 4 communicate with the oil duct of differential pressure transmitter device 9 with oil duct through valve piece 8, and pressure at two ends equates, carrying out along with work, low pressure piston 5 drives piston rod 6 to be continued to move to left end, throttling step 7 on the piston rod 6 enters into oil back chamber 12, in oil cylinder, form buffer cavity 13, the speed of piston operation also begins to slow down, in the inclined-plane all entered into buffer cavity 13, B oil duct 2 did not almost have oil return, and piston rod 6 is transfixion almost; At this moment C oil duct 3 that communicates with differential pressure transmitter device 9 and D oil duct 4, have only C oil duct 3 logical oil, after throttling step 7 enters oil back chamber 12, the pressure of C oil duct 3 increases, at this moment form pressure difference at differential pressure transmitter device 9 two ends, when reaching the value of signal-transmitting machine response, this pressure difference sends signal, solenoid valve changes oil-feed port, B oil duct 2 fuel feeding, low pressure piston 5 drives piston rod 6 end motion to the right, 1 oil return of A oil duct with the left end same principle, thereby realizes that low pressure piston 5 drives piston rod 6 and realizes the reciprocation cycle motion.Seal ring 14, plug screw 15, spring 16, steel ball seat 10, steel ball 11; can push steel ball 11 open by C oil duct 3, discharge C oil duct 3 fluid, protection differential pressure transmitter device 9; 4 oil-feeds of D oil duct are pushed steel ball 11 open and are entered into low-pressure cavity from C oil duct 3; promote fast low pressure piston 5 and drive piston rod 6 and move to the other end, the utility model is easy to maintenance, time saving and energy saving, can reach the smooth-going effect of commutation; there is not impact again; piston can not move to the dead point simultaneously, makes it can better protect piston, avoids impaired.

Claims (2)

1. an oil hydraulic cylinder commutates with pressure reduction sender structure, comprise A oil duct (1), B oil duct (2), C oil duct (3), D oil duct (4), low pressure piston (5), piston rod (6), throttling step (7), valve piece (8) and differential pressure transmitter device (9), it is characterized in that: described low pressure piston (5) is connected with piston rod (6) presser type, described throttling step (7) is arranged on the piston rod (6), described C oil duct (3) and D oil duct (4) communicate through the oil duct of valve piece (8) with described differential pressure transmitter device (9), and pressure at two ends equates.
2. oil hydraulic cylinder commutation pressure reduction sender structure according to claim 1, it is characterized in that: also comprise spring (16), steel ball seat (10) and steel ball (11), described steel ball (11) is arranged in the steel ball seat (10).
CN2011201363127U 2011-05-03 2011-05-03 Differential pressure signaling structure for reversing of hydraulic cylinder Expired - Fee Related CN202073863U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2011201363127U CN202073863U (en) 2011-05-03 2011-05-03 Differential pressure signaling structure for reversing of hydraulic cylinder

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2011201363127U CN202073863U (en) 2011-05-03 2011-05-03 Differential pressure signaling structure for reversing of hydraulic cylinder

Publications (1)

Publication Number Publication Date
CN202073863U true CN202073863U (en) 2011-12-14

Family

ID=45111967

Family Applications (1)

Application Number Title Priority Date Filing Date
CN2011201363127U Expired - Fee Related CN202073863U (en) 2011-05-03 2011-05-03 Differential pressure signaling structure for reversing of hydraulic cylinder

Country Status (1)

Country Link
CN (1) CN202073863U (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105546201A (en) * 2016-03-07 2016-05-04 布志刚 Pressure valve with movable valve element
CN105822617A (en) * 2015-01-05 2016-08-03 山东交通学院 Control valve realizing hydraulic cylinder automatic commutation
CN106704288A (en) * 2015-07-14 2017-05-24 徐工集团工程机械股份有限公司 Hydraulic cylinder buffering structure and engineering machine with hydraulic cylinder buffering structure

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105822617A (en) * 2015-01-05 2016-08-03 山东交通学院 Control valve realizing hydraulic cylinder automatic commutation
CN106704288A (en) * 2015-07-14 2017-05-24 徐工集团工程机械股份有限公司 Hydraulic cylinder buffering structure and engineering machine with hydraulic cylinder buffering structure
CN106704288B (en) * 2015-07-14 2018-09-04 徐工集团工程机械股份有限公司 Hydraulic cylinder and engineering machinery with the hydraulic cylinder
CN105546201A (en) * 2016-03-07 2016-05-04 布志刚 Pressure valve with movable valve element
CN105546201B (en) * 2016-03-07 2018-04-27 广州联诚能源科技发展有限公司 A kind of pressure valve with movable valve plug

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

Granted publication date: 20111214

Termination date: 20200503

CF01 Termination of patent right due to non-payment of annual fee