CN102619805A - Hydraulic cylinder suitable for controlling plurality of hydraulic cylinders to extend sequentially - Google Patents
Hydraulic cylinder suitable for controlling plurality of hydraulic cylinders to extend sequentially Download PDFInfo
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- CN102619805A CN102619805A CN201210126559XA CN201210126559A CN102619805A CN 102619805 A CN102619805 A CN 102619805A CN 201210126559X A CN201210126559X A CN 201210126559XA CN 201210126559 A CN201210126559 A CN 201210126559A CN 102619805 A CN102619805 A CN 102619805A
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Abstract
The invention discloses a hydraulic cylinder suitable for controlling a plurality of hydraulic cylinders to extend sequentially. The hydraulic cylinder comprises a hydraulic cylinder body, a piston body, a piston rod, piston seals, a check valve and an oil gathering block, wherein the piston body in a hollow cylinder structure is arranged in the hydraulic cylinder body; the piston rod is fixedly connected with the front end of the piston body; the piston seals are arranged in corresponding ring slots which are machined on the outer circle surface of the piston body sequentially from the front side to the rear side; the check valve is arranged on the piston body; and the oil gathering block is fixedly connected to the hydraulic cylinder body. The hydraulic cylinder has the characteristics that the plurality of hydraulic cylinders can sequentially and smoothly extend when connected in series and cannot be limited by the number of the hydraulic cylinders or influenced by the actual load fluctuations under the condition that external control elements (such as sequence valves used in the prior art) are not added.
Description
Technical field
The present invention relates to a kind of a plurality of oil hydraulic cylinders of control that are applicable to and stretch out the oil hydraulic cylinder of motion in proper order, this oil hydraulic cylinder need not add extra control units such as sequence valve, and cost is few, droop loss is little, less energy consumption, and effectively the reliability of motion is stretched out in control sequence.
Background technique
At present; It is extensive that a plurality of oil hydraulic cylinder sequentially-operatings stretch out the ten minutes of using in the work at the crane gear telescopic boom; But receive the jib structure spatial limitation of crane arm; Increase too much peripheral cell and be unfavorable for global design and parts installation, and the pts wt of the control unit that increases also is a kind of load to shear leg.
Under the existing technical specifications; The shear leg telescopic hydraulic cylinder stretches out motion in order to guarantee order; All take pressure controlled valve to carry out sequential movements control; Promptly install sequence valve additional, utilize the height of the cracking pressure that sequence valve sets to control the sequential movements of oil hydraulic cylinder at the rodless cavity filler opening place of each oil cylinder of all the other the follow-up series cylinders except that first oil hydraulic cylinder.As shown in Figure 2, when selector valve was carried out to left lateral position, the pressure oil of hydraulic power got into the rodless cavity of first oil hydraulic cylinder, reach the breakout pressure of first oil hydraulic cylinder along with the rising of pressure and when pressure after, the piston rod of first oil hydraulic cylinder begins overhanging motion; After first oil hydraulic cylinder moves to terminal point; System pressure continues to rise; Reach the sequence valve setting cracking pressure of adjacent next oil hydraulic cylinder rodless cavity filler opening place connection at system pressure after; Hydraulic oil is opened the oil-feed sequence valve before the oil hydraulic cylinder filler opening and is got into the rodless cavity of second oil hydraulic cylinder, makes the piston rod of second oil hydraulic cylinder begin overhanging motion and the final sequential movements control of accomplishing series cylinder.
Existing technical specifications are used comparatively extensive in the sequentially-operating control of less number oil hydraulic cylinder.But along with increasing of arm arm joint (being actuator), the system energy loss that the pressure of a plurality of oil hydraulic cylinder sequence valves is set and sequence valve brought will become distinct issues.With the existing technology of Fig. 3 (BOSCH-REXROTH) tubular type sequence valve is example; The minimum setting cracking pressure interval of this valve low-pressure opening series is 10 ~ 30bar; If the unlatching pressure differential resetting value that applies it to the Maximum operating pressure 350bar of system, needs 6 oil hydraulic cylinders to stretch out action and adjacent two sequence valves in proper order is in the control system of 20bar, theoretically, only with regard to the utilization of sequence valve; The pressure that makes system works propagation of pressure to last the 6th oil hydraulic cylinder can only be reached 250bar; System pressure is with a toll of 28.6%, and therefore, no matter existing technology is that reliability or the application area that sequential movements is controlled all exists certain narrow limitation.
Summary of the invention
The object of the invention provides a kind of a plurality of oil hydraulic cylinders of control that are applicable to stretch out the oil hydraulic cylinder of motion in proper order to existing deficiency in the above-mentioned existing technology just.The relative position of oil hydraulic cylinder of the present invention through oil hydraulic cylinder internal oil channel, aperture, seal ring etc. realizes that with the motion of piston rod the oil circuit that the next stage oil hydraulic cylinder stretches out motion opens in proper order.Oil hydraulic cylinder of the present invention need not add elements such as extra electric, hydrovalve can realize that the multi-hydraulic-cylinder series sequence stretches out motion control, convenient, energy-conservation, efficient.
The object of the invention can be realized through following technique measures:
The oil hydraulic cylinder that is applicable to that a plurality of oil hydraulic cylinders of control stretch out motion in proper order of the present invention comprises hydraulic cylinder; Be installed in the piston body of the hollow cylinder structure in the hydraulic cylinder; Piston rod with piston body front end Joint; Be installed in piston seal, piston seal in the corresponding annular groove that processes on the piston body periphery from front to back successively, and be installed in one-way valve on the piston body, be fixed in the oil-collecting piece on the hydraulic cylinder; On the piston body between described piston seal and the piston seal, be processed with one traverse piston body reach through hole (this hole is the important channel of adjacent oil hydraulic cylinder rod chamber UNICOM before and after guaranteeing), on the piston body of the opposite side that is positioned at piston seal, be processed with the tapped hole that is used to install one-way valve of the rod chamber that is communicated with piston body hollow cavity and oil hydraulic cylinder; The hollow cavity of said piston body is the step hole structure, and the aperture of hollow cavity that wherein is positioned at the reach through hole rear portion is less than the aperture that is positioned at the anterior hollow cavity of reach through hole; The mid-rear portion of said piston rod is a hollow cylinder structure; The hollow cavity of said piston rod constitutes inside and outside double-deck oil duct through the inner catheter by extending behind the forward direction that is arranged on the coaxial line mode in the hollow cavity; The back extending end of described inner catheter is installed in the hollow cavity of piston body, and forms the drive fit relation with the hollow cavity wall that is positioned at the reach through hole rear portion; One end of said internal layer oil duct is connected with the rodless cavity of oil hydraulic cylinder, and the V2 hydraulic fluid port of the other end and the setting of piston rod front end links, and the V2 hydraulic fluid port connects the rodless cavity to next adjacent oil hydraulic cylinder through connecting pipeline; One end of said outer oil duct is through being connected with the UNICOM's oil pocket that is made up of the reach through hole that traverses piston body with annular chamber between the inner catheter at the hollow cavity at piston rod reach through hole rear portion; The C2 hydraulic fluid port of the other end and the setting of piston rod front end links, and the C2 hydraulic fluid port connects the C1 hydraulic fluid port that on the oil-collecting piece of next adjacent oil hydraulic cylinder, is provided with through connecting pipeline; The oil-collecting piece is provided with K4 linked hole and K5 linked hole, and wherein the K5 linked hole links with the rod chamber of oil hydraulic cylinder all the time, and the K4 linked hole is connected with the UNICOM's oil pocket that is made up of the reach through hole that traverses piston body when piston rod extend out to maximum travel position.
With the corresponding opposite side oil duct junction of the C1 hydraulic fluid port on the oil-collecting piece be the enclosed construction that pressure transducer is installed.
Subsequent use drainback passage when the effect of said one-way valve is to provide a series connection multi-hydraulic-cylinder to carry out retraction movement; The one-way valve application scenarios does; When oil hydraulic cylinder is carried out retracting motion; Cause all the other certain oil hydraulic cylinders retraction earlier except that last oil hydraulic cylinder if receive the interference of unexpected load changing etc.; The normal withdrawal conducting oil duct of rear oil hydraulic cylinder rod chamber just is closed like this, makes the rear oil hydraulic cylinder just can't accomplish retraction movement; In such cases, one-way valve is opened under the effect of pressure oil and is set up another UNICOM's oil duct for the rear oil hydraulic cylinder, thereby makes the several oil hydraulic cylinders in back can accomplish full reduced swivel motion.
Working principle of the present invention is following:
Be controlled to be example explanation with three series cylinder sequential movements and specifically stretch out the sequence of movement situation: when first oil hydraulic cylinder is done when stretching out motion and reaching the structure desired location, stretch out motion thereby the oil return circuit that structure of the present invention is connected second oil cylinder automatically in first oil hydraulic cylinder makes second oil hydraulic cylinder begin to do; Do when second oil cylinder and to stretch out motion and when reaching the structure desired location, stretch out motion thereby the oil return circuit that structure of the present invention is connected the 3rd oil cylinder automatically in second oil hydraulic cylinder makes the 3rd oil hydraulic cylinder begin to do; Above-mentioned stretching out in the movement process; When the oil hydraulic cylinder that is moving does not move to the structure desired location when its piston; Because the oil return circuit of its rear oil hydraulic cylinder is not switched on (promptly being blocked); Therefore can guarantee that rear oil hydraulic cylinder that WKG working stretches out the oil hydraulic cylinder of motion can not be done this moment and stretch out motion, guarantee that with this multi-hydraulic-cylinder stretches out the reliability that action control is stretched out in realization in the movement process in proper order.
Implementation procedure for a plurality of series cylinder sequential movements controls is the same; Be to connect the oil return circuit of adjacent next oil hydraulic cylinder after previous oil hydraulic cylinder stretches out motion and arrives the regulation control point just now automatically and adjacent next oil hydraulic cylinder is done to stretch out motion, until the oil return circuit that connects in turn last oil hydraulic cylinder and make last oil hydraulic cylinder can realize stretching out motion.
Beneficial effect of the present invention is following:
1, pressure loss is little, not perplexed by multistage sequence valve pressure drop.
2, not limited by the oil hydraulic cylinder joint number, be particularly useful for multisection hydraulic cylinder system, or the sequentially-operating of complex system.
3, need not extra electric hydraulic peripheral cell, form structure is compact almost consistent with oil hydraulic cylinder outward appearance commonly used.
4, in the compact hydraulic system, reduced of the requirement of exterior line layout to design and installation, also reduced the leakage probability during pipeline connects simultaneously.
The out of order problem that caused by load and interference effect, antijamming capability is strong.
6, economical, energy-conservation, efficient.
Description of drawings
Fig. 1 is a structural drawing of the present invention.
Fig. 2 is that existing technological oil hydraulic cylinder is opened the control hydraulic schematic diagram in proper order.
Fig. 3 is existing technological tubular type sequence valve schematic diagram.
Fig. 4 is structure of piston figure among Fig. 1.
Fig. 5 is the left view of Fig. 4.
Fig. 6 is the A-A sectional view of Fig. 5.
Fig. 7 is the B-B sectional view of Fig. 4.
Fig. 8 is that the oil hydraulic cylinder I is stretched out motion diagram.
Fig. 9 is that the oil hydraulic cylinder II is stretched out motion diagram.
Figure 10 is oil hydraulic cylinder retraction movement figure.
Figure 11 is that folding arm hangs 6 joint telescopic boom hydraulic schematic diagrams.
Embodiment
To combine embodiment's (accompanying drawing) to further describe below the present invention:
Like Fig. 1,4,5,6, shown in 7; The a plurality of oil hydraulic cylinders of control that are applicable to of the present invention stretch out the oil hydraulic cylinder of motion in proper order; It comprises hydraulic cylinder 1, is installed in the piston body 2 of the hollow cylinder structure in the hydraulic cylinder, with the piston rod 7 of piston body front end Joint; Be installed in piston seal 3, piston seal 5 in the corresponding annular groove that processes on the piston body periphery from front to back successively, and be installed in one-way valve 6 on the piston body, be fixed in the oil-collecting piece 4 on the hydraulic cylinder; On the piston body 2 between described piston seal 3 and the piston seal 5, be processed with one traverse piston body reach through hole K1, on the piston body 2 of the opposite side that is positioned at piston seal 5, be processed with the tapped hole K2 that is used to install one-way valve 6 of the rod chamber X2 that is communicated with piston body hollow cavity and oil hydraulic cylinder; The hollow cavity of said piston body 2 is the step hole structure, and the aperture of hollow cavity that wherein is positioned at reach through hole K1 rear portion is less than the aperture that is positioned at the anterior hollow cavity of reach through hole K1; The mid-rear portion of said piston rod 7 is a hollow cylinder structure; The hollow cavity of said piston rod 7 constitutes inside and outside double-deck oil duct Y1, Y2 through the inner catheter by extending behind the forward direction that is arranged on the coaxial line mode in the hollow cavity; The back extending end of described inner catheter is installed in the hollow cavity of piston body 2, and forms the drive fit relation with the hollow cavity wall that is positioned at reach through hole K1 rear portion; The end of said internal layer oil duct Y1 is connected with the rodless cavity X1 of oil hydraulic cylinder, and the V2 hydraulic fluid port of the other end and piston rod 7 front end settings links, and the V2 hydraulic fluid port connects the rodless cavity X1 to next adjacent oil hydraulic cylinder through connecting pipeline; The end of said outer oil duct Y2 is through being connected with the oil pocket X3 of UNICOM that is made up of the reach through hole K1 that traverses piston body with annular chamber between the inner catheter at the hollow cavity at piston rod reach through hole rear portion; The C2 hydraulic fluid port of the other end and piston rod 7 front end settings links, and the C2 hydraulic fluid port connects the C1 hydraulic fluid port that on the oil-collecting piece 4 of next adjacent oil hydraulic cylinder, is provided with through connecting pipeline; Said oil-collecting piece 4 is welded on the hydraulic cylinder 1; Oil-collecting piece 4 is provided with K4 linked hole and K5 linked hole; Wherein the K5 linked hole links with the rod chamber X2 of oil hydraulic cylinder all the time; The K4 linked hole is connected with the oil pocket X3 of UNICOM that is made up of the reach through hole K1 that traverses piston body when piston rod 7 extend out to maximum travel position; Make the C1 hydraulic fluid port of oil hydraulic cylinder link with leading to subordinate's rod chamber C2 hydraulic fluid port through rod chamber oil duct Y2 in K4 linked hole, the oil pocket X3 of UNICOM, the pipe, (when piston rod 7 reaches the structure desired location) can realize that the hydraulic oil between oil hydraulic cylinder C1 hydraulic fluid port and C2 hydraulic fluid port two-way circulates also promptly with this understanding; With the corresponding opposite side oil duct junction of the C1 hydraulic fluid port on the oil-collecting piece be enclosed construction that pressure transducer is installed (showing in the accompanying drawings).
Stretch out in the movement process at hydraulic cylinder piston rod 7 (be piston rod 7 do not stretch out and arrive the structure desired location); Because the oil pocket X3 of UNICOM is sealed and can not link with the K4 linked hole by piston seal 3, hydraulic cylinder 1, piston seal 5; Therefore the C1 hydraulic fluid port through K4 linked hole, the oil pocket X3 of UNICOM and with lead to the path that two-way circulates that subordinate's rod chamber C2 hydraulic fluid port is connected and be blocked; This moment is owing to receive the restriction of one-way valve 6 folk prescriptions to circulating function; Unique path between oil hydraulic cylinder C1 hydraulic fluid port and C2 hydraulic fluid port and flow of pressurized are to being: hydraulic oil gets into oil-collecting piece 4 from the C1 hydraulic fluid port and arrives the K5 linked hole and get into rod chamber X2 through runner; When promoting piston 2 and driving piston rod 7 common execution retraction movement; Pressure oil is pushed one-way valve 6 open and is got in the pipe rod chamber oil duct Y2 and flow to and lead to the rod chamber C2 of subordinate hydraulic fluid port, is communicated to the C1 hydraulic fluid port of adjacent next oil hydraulic cylinder again through exterior line, makes next oil cylinder also can carry out retraction movement; As one-way valve 6 folk prescriptions to circulating function require; Stretch out in the process of motion in the multi-hydraulic-cylinder execution; The oil hydraulic cylinder that is moving does not allow hydraulic oil to flow through one-way valve 6 in the other direction and flow to the C1 hydraulic fluid port from the interior rod chamber oil duct Y2 of C2 hydraulic fluid port entering pipe; This shows, in stretching out movement process, the oil hydraulic cylinder that WKG working stretches out action operation do not allow hydraulic oil from the C2 hydraulic fluid port to the hydraulic fluid port C1 that circulates.
Concrete implementation method of structure of the present invention and hydraulic principle are following:
Further introduce a plurality of series cylinder realization of the present invention below in conjunction with accompanying drawing and stretch out the method for motion control (is example with two oil hydraulic cylinders) in proper order:
(1) the oil hydraulic cylinder I begins to stretch out motion and oil hydraulic cylinder II still remain static (as shown in Figure 8).
Stretch out in the movement process in execution; High pressure oil arrives oil hydraulic cylinder I hydraulic fluid port V1 and gets into the rodless cavity X1 of oil hydraulic cylinder I through the exterior line I; At rodless cavity X1 place; The thrust of hydraulic oil on piston 2 and the piston rod of desiring piston 2 and piston 2 are positioned 7 produce to the right and stretch out motion; And this moment, the mouth K5 of UNICOM of the oil-collecting piece 4 on the oil hydraulic cylinder I of the hydraulic oil among the oil hydraulic cylinder I rod chamber X2 arrives the mouth K4 of UNICOM and flows to the C1 hydraulic fluid port of oil hydraulic cylinder I, and the exterior line II that is connected with the C1 hydraulic fluid port of warp flows back to hydraulic system again; Thereby make the oil hydraulic cylinder I form the complete loops of rodless cavity X1 oil-feed, rod chamber X2 oil return, so the piston rod 7 of oil hydraulic cylinder I can be done and stretch out motion under the thrust of aforementioned hydraulic oil to the right; Meanwhile; Can pressure be passed to the hydraulic fluid port towards the rodless cavity V2 of subordinate through rodless cavity oil duct Y1 in the pipe in the oil hydraulic cylinder I though act on the pressure oil at oil hydraulic cylinder I rodless cavity X1 place; And warp arrives the hydraulic fluid port V1 place of oil hydraulic cylinder II and gets into the rodless cavity X1 of oil hydraulic cylinder II with the exterior line III that is connected towards subordinate's rodless cavity V2 hydraulic fluid port; Rodless cavity X1 place in the oil hydraulic cylinder II; Though can producing one equally, the pressure of hydraulic oil desire to make the piston rod 7 of oil hydraulic cylinder II to produce the thrust of stretching out motion to the right; But this moment; The mouth K5 of UNICOM of the oil-collecting piece 4 on the oil hydraulic cylinder II of the hydraulic oil among the oil hydraulic cylinder II rod chamber X2 arrives the mouth K4 of UNICOM and flows to the C1 hydraulic fluid port of oil hydraulic cylinder II, and what the exterior line IV that is connected with the C1 hydraulic fluid port of warp was communicated to the oil hydraulic cylinder I again leads to the rod chamber C2 of subordinate hydraulic fluid port, and rod chamber oil duct Y2 arrives the oil pocket X3 of UNICOM in the oil hydraulic cylinder I in the pipe of oil hydraulic cylinder I again; Because the one-way valve 6 in the oil hydraulic cylinder I does not allow hydraulic oil to flow to rod chamber X2 from managing interior rod chamber oil duct Y2 through one-way valve 6 at this moment; Simultaneously also since the piston rod 7 of oil hydraulic cylinder I in doing the process of stretching out motion, in the oil hydraulic cylinder I oil pocket X3 of UNICOM of piston 2 fail with the oil hydraulic cylinder I on the K4 linked hole of oil-collecting piece 4 align and be communicated with, and under the hydraulic cylinder 1 of oil hydraulic cylinder I, piston seal 3, piston seal 5 three's actings in conjunction, be closed; Therefore the hydraulic oil among the oil hydraulic cylinder II rod chamber X2 can not form the loop this moment, and the piston rod 7 of oil hydraulic cylinder II can not be done and stretch out motion; Can know that in conjunction with above analysis under oil hydraulic cylinder application conditions of the present invention, when last oil hydraulic cylinder is done in the process of stretching out motion, its rear oil hydraulic cylinder that links to each other is guaranteed owing to oil return circuit is blocked to do to stretch out motion.
(2) the oil hydraulic cylinder I is stretched out after motion reaches position of rest, and oil hydraulic cylinder II side begins to start stretches out motion (as shown in Figure 9).
When the piston rod 7 of oil hydraulic cylinder I after continuing protruding under the pressure oil effect at rodless cavity X1 place and finally arriving the structure desired location; Oil pocket X3 of oil hydraulic cylinder I UNICOM and K4 linked hole are able to UNICOM; The mouth K5 of UNICOM of the hydraulic oil oil-collecting piece 4 on the oil hydraulic cylinder II among this moment oil hydraulic cylinder II rod chamber X2 arrives the mouth K4 of UNICOM and flows to the C1 hydraulic fluid port of oil hydraulic cylinder II; What the exterior line IV that warp is connected with the C1 hydraulic fluid port was communicated to the oil hydraulic cylinder I leads to the rod chamber C2 of subordinate hydraulic fluid port; The C1 hydraulic fluid port of rod chamber oil duct Y2, the oil pocket X3 of UNICOM, K4 linked hole and oil hydraulic cylinder I links in the pipe of oil hydraulic cylinder I again; Last warp again flows back to hydraulic system with the exterior line II that the C1 hydraulic fluid port of oil hydraulic cylinder I is connected; Thereby make the oil hydraulic cylinder II form the complete loops of rodless cavity X1 oil-feed, rod chamber X2 oil return; Therefore previous oil hydraulic cylinder stretch out motion arrive structure desired location, oil hydraulic cylinder II oil return circuit by the condition of UNICOM under, the piston rod 7 of oil hydraulic cylinder II can stop after motion arrives the structure desired location doing to the right under the thrust of aforementioned hydraulic oil to stretch out motion and stretch out until the oil hydraulic cylinder II.
In like manner, the order of utilizing the present invention can realize that equally a plurality of oil hydraulic cylinders stretch out movement process is stretched out control, and after last oil hydraulic cylinder reaches the structure desired location, stop, whole heavy wool cylinder stretches out movement process in proper order and finishes.
(3) oil hydraulic cylinder retraction movement process (shown in figure 10).
Oil hydraulic cylinder I, oil hydraulic cylinder II are when carrying out retraction movement; Pressure oil arrives the oil-collecting piece 4 of oil hydraulic cylinder I through the exterior line II; Directly get into the rod chamber X2 of oil hydraulic cylinder I through the K5 linked hole; And pressure acted on the diagram right side of oil hydraulic cylinder I piston 2, make the piston rod 7 of oil hydraulic cylinder I have the trend of doing retraction movement left; Meanwhile; The oil-collecting piece 4 interior hydraulic oil that get into the oil hydraulic cylinder I also can directly get into the oil pocket X3 of UNICOM and arrive rod chamber oil duct Y2 in the pipe through the K4 linked hole; Also can open one-way valve 6 simultaneously and arrive rod chamber oil duct Y2 (when the oil pocket X3 of UNICOM seals) in the pipe through the K5 linked hole; And lead to the rod chamber C2 of subordinate hydraulic fluid port via what rod chamber oil duct Y2 in the pipe arrived the oil hydraulic cylinder I; Arrive in the oil-collecting piece 4 of oil hydraulic cylinder II through the exterior line IV, in oil-collecting piece 4 inside of oil hydraulic cylinder II, hydraulic oil directly gets into the rod chamber X2 of oil hydraulic cylinder II through the K5 linked hole of oil hydraulic cylinder II again; And pressure acted on the diagram right side of oil hydraulic cylinder II piston 2, make the piston rod 7 of oil hydraulic cylinder II have the trend of doing retraction movement left; For the low pressure oil return circuit; Hydraulic oil among the oil hydraulic cylinder II rodless cavity X1 is through V1 hydraulic fluid port and exterior line III UNICOM and arrive the oil hydraulic cylinder I towards the rodless cavity V2 of subordinate hydraulic fluid port; Rodless cavity oil duct Y1 arrives oil hydraulic cylinder I rodless cavity X1 in the pipe of oil hydraulic cylinder I again; In the rodless cavity X1 of oil hydraulic cylinder I; The exterior line I that the backflow hydraulic oil of oil hydraulic cylinder II and the backflow hydraulic oil of oil hydraulic cylinder I reflux and the V1 hydraulic fluid port of warp and oil hydraulic cylinder I links flows back to hydraulic system; Thereby form oil hydraulic cylinder I, the rod chamber X2 oil-feed of oil hydraulic cylinder II, the complete loops of rodless cavity X1 oil return, so the piston rod 7 of oil hydraulic cylinder I, oil hydraulic cylinder II is realized retraction movement under the effect of pressure oil.
The present invention can be applicable to the order breakdown action of hydraulic pressure, pneumatic system more piece cylinder.Carry out the introduction of application facet below in conjunction with Figure 11.
In Figure 11; Hydraulic oil arrives selector valve through oil pump, and when selector valve switches to left side position, high-voltage oil liquid arrives the rodless cavity of oil hydraulic cylinder 1; Through the rodless cavity of the inner oil duct arrival of the rod chamber of oil hydraulic cylinder 1 next stage oil hydraulic cylinder, until the rodless cavity of final section oil hydraulic cylinder 6.Six joint oil hydraulic cylinder rodless cavities are cascaded the conducting all the time of whole process through pipeline.Return line is cascaded through the inside oil duct of rod chamber.Stretch out in the process in whole order, only have the rod chamber of oil hydraulic cylinder 1 can flow back to fuel tank with selector valve UNICOM all the time.Along with the lifting of in-line pressure, after reaching oil hydraulic cylinder 1 breakout pressure, oil hydraulic cylinder 1 begins to stretch out.When oil hydraulic cylinder 1 execution is stretched out motion and is run to the stroke end; The rod chamber oil return circuit side conducting of oil hydraulic cylinder 2; The piston rod of oil hydraulic cylinder 2 begins to stretch out and stretches out up to oil hydraulic cylinder 2 and runs to the stroke end; Subsequently, could open and begin oil hydraulic cylinder 3 execution with the oil hydraulic cylinder 2 adjacent following joint oil hydraulic cylinder rod chamber return lines that are connected and stretch out motion.The above-mentioned movement control mode of stretching out repeats to realize stretching out fully until oil hydraulic cylinder 6, stretches out process thereby the completion folding arm hangs the order of 6 joint telescopic booms.
Claims (1)
1. one kind is applicable to that a plurality of oil hydraulic cylinders of control stretch out the oil hydraulic cylinder of motion in proper order; It is characterized in that: it comprises hydraulic cylinder; Be installed in the piston body of the hollow cylinder structure in the hydraulic cylinder; With the piston rod of piston body front end Joint, be installed in piston seal, piston seal in the corresponding annular groove that processes on the piston body periphery from front to back successively, and be installed in one-way valve on the piston body, be fixed in the oil-collecting piece on the hydraulic cylinder; On the piston body between described piston seal and the piston seal, be processed with one traverse piston body reach through hole, on the piston body of the opposite side that is positioned at piston seal, be processed with the tapped hole that is used to install one-way valve of the rod chamber that is communicated with piston body hollow cavity and oil hydraulic cylinder; The hollow cavity of said piston body is the step hole structure, and the aperture of hollow cavity that wherein is positioned at the reach through hole rear portion is less than the aperture that is positioned at the anterior hollow cavity of reach through hole; The mid-rear portion of said piston rod is a hollow cylinder structure; The hollow cavity of said piston rod constitutes inside and outside double-deck oil duct through the inner catheter by extending behind the forward direction that is arranged on the coaxial line mode in the hollow cavity; The back extending end of described inner catheter is installed in the hollow cavity of piston body, and forms the drive fit relation with the hollow cavity wall that is positioned at the reach through hole rear portion; One end of said internal layer oil duct is connected with the rodless cavity of oil hydraulic cylinder, and the V2 hydraulic fluid port of the other end and the setting of piston rod front end links, and the V2 hydraulic fluid port connects the rodless cavity to next adjacent oil hydraulic cylinder through connecting pipeline; One end of said outer oil duct is through being connected with the UNICOM's oil pocket that is made up of the reach through hole that traverses piston body with annular chamber between the inner catheter at the hollow cavity at piston rod reach through hole rear portion; The C2 hydraulic fluid port of the other end and the setting of piston rod front end links, and the C2 hydraulic fluid port connects the C1 hydraulic fluid port that on the oil-collecting piece of next adjacent oil hydraulic cylinder, is provided with through connecting pipeline; The oil-collecting piece is provided with K4 linked hole and K5 linked hole, and wherein the K5 linked hole links with the rod chamber of oil hydraulic cylinder all the time, and the K4 linked hole is connected with the UNICOM's oil pocket that is made up of the reach through hole that traverses piston body when piston rod extend out to maximum travel position.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201210126559.XA CN102619805B (en) | 2012-04-27 | 2012-04-27 | Hydraulic cylinder suitable for controlling plurality of hydraulic cylinders to extend sequentially |
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| CN201210126559.XA CN102619805B (en) | 2012-04-27 | 2012-04-27 | Hydraulic cylinder suitable for controlling plurality of hydraulic cylinders to extend sequentially |
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| CN102619805A true CN102619805A (en) | 2012-08-01 |
| CN102619805B CN102619805B (en) | 2014-05-21 |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105114391A (en) * | 2015-08-25 | 2015-12-02 | 中国船舶重工集团公司第七一九研究所 | Sequential-action hydraulic cylinder |
| CN105221520A (en) * | 2015-11-02 | 2016-01-06 | 长治清华机械厂 | Order oil cylinder |
| CN106979186A (en) * | 2017-04-17 | 2017-07-25 | 宁波江北宇洲液压设备厂 | A kind of logical valve for order of being stretched by mechanical structure control cylinder |
| CN108457931A (en) * | 2018-05-03 | 2018-08-28 | 陕西昆仑机械装备制造有限责任公司 | A kind of piston rod oil inlet oil extraction oil cylinder |
| CN109751966A (en) * | 2019-01-29 | 2019-05-14 | 广东联城住工装备信息科技有限公司 | The detection method of hydraulic clamping system, equipment of vibrating and hydraulic clamping system |
| CN110294065A (en) * | 2019-04-30 | 2019-10-01 | 武汉船用机械有限责任公司 | Load test tooling |
| CN110762072A (en) * | 2019-11-05 | 2020-02-07 | 徐州徐工矿业机械有限公司 | Hydraulic system and method for realizing sequential action of engineering vehicle mechanism and engineering vehicle |
| CN111894921A (en) * | 2020-07-30 | 2020-11-06 | 湖南双达机电有限责任公司 | Hydraulic system of telescopic boom, telescopic boom and engineering vehicle |
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