CN102619805B - 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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- CN102619805B CN102619805B CN201210126559.XA CN201210126559A CN102619805B CN 102619805 B CN102619805 B CN 102619805B CN 201210126559 A CN201210126559 A CN 201210126559A CN 102619805 B CN102619805 B CN 102619805B
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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 ofly be applicable to control multiple oil hydraulic cylinders order and stretch out the oil hydraulic cylinder of motion, this oil hydraulic cylinder does not need to add the control units such as extra 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 very extensive that multiple oil hydraulic cylinder sequentially-operatings are applied in crane gear telescopic boom stretches out work, but be subject to the jib structure spatial constraints 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 increasing is also a kind of load to shear leg.
Under existing technical specifications, shear leg telescopic hydraulic cylinder stretches out motion in order to guarantee order, all take pressure controlled valve to carry out sequential movements control, install sequence valve additional at the rodless cavity filler opening place of each oil cylinder of all the other the follow-up series cylinders except first oil hydraulic cylinder, utilize the height of the cracking pressure that sequence valve sets to control the sequential movements of oil hydraulic cylinder.As shown in Figure 2, in the time that selector valve is carried out to left lateral position, the pressure oil of hydraulic power enters the rodless cavity of first oil hydraulic cylinder, reaches after the breakout pressure of first oil hydraulic cylinder along with the rising of pressure and when pressure, and the piston rod of first oil hydraulic cylinder starts overhanging motion; When first oil hydraulic cylinder moves to after terminal, system pressure continues to rise, the sequence valve that reaches the connection of adjacent next oil hydraulic cylinder rodless cavity filler opening place at system pressure is set after cracking pressure, hydraulic oil is opened the oil-feed sequence valve before hydraulic cylinder oil inlet and is entered the rodless cavity of second oil hydraulic cylinder, makes the piston rod of second oil hydraulic cylinder start overhanging motion and finally completes the sequential movements control of series cylinder.
Existing technical specifications are applied 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 setting of multiple oil hydraulic cylinder sequence valves and sequence valve bring will become distinct issues.Take existing technology (BOSCH-REXROTH) the tubular type sequence valve of Fig. 3 as example, the minimum setting cracking pressure interval of this valve low-pressure opening series is 10 ~ 30bar, if apply it to system Maximum operating pressure 350bar, in the control system that the starting differential pressure setting value that needs 6 oil hydraulic cylinder order extend actions and adjacent two sequence valves is 20bar, theoretically, only with regard to the utilization of sequence valve, the pressure that makes system works pressure be passed to last the 6th oil hydraulic cylinder can only be reached to 250bar, system pressure loss reaches 28.6%, therefore, no matter existing technology is that reliability or the application area of sequential movements control all has some limitations.
Summary of the invention
Object of the present invention provides just a kind of and is applicable to control multiple oil hydraulic cylinders order and stretches out the oil hydraulic cylinder of motion for existing deficiency in above-mentioned prior art.The relative position of oil hydraulic cylinder of the present invention by oil hydraulic cylinder internal oil channel, aperture, seal ring etc. realized with the motion of piston rod the oil circuit order that next stage oil hydraulic cylinder stretches out motion and opened.Oil hydraulic cylinder of the present invention does not need to add the elements such as extra electric, hydrovalve can be realized multi-hydraulic-cylinder series sequence and stretch out motion control, convenient, energy-conservation, efficient.
Object of the present invention can realize by following technique measures:
Of the present inventionly be applicable to control the oil hydraulic cylinder that multiple oil hydraulic cylinders orders stretch out motion and comprise hydraulic cylinder, be arranged on the piston body of the hollow cylinder structure in hydraulic cylinder, piston rod with piston body front end Joint, be arranged on successively from front to back piston seal, piston seal in the corresponding annular groove processing on piston body periphery, and be arranged on one-way valve on piston body, be fixed in the oil gathering block on hydraulic cylinder; On the piston body between described piston seal and piston seal, be processed with a reach through hole that traverses piston body (this hole is the important channel of adjacent oil hydraulic cylinder rod chamber UNICOM before and after guaranteeing), on the piston body of opposite side that is positioned at piston seal, be processed be communicated with piston body hollow cavity and oil hydraulic cylinder rod chamber for the tapped hole of one-way valve is installed; The hollow cavity of described piston body is step hole structure, and the aperture that is wherein positioned at the hollow cavity at reach through hole rear portion is less than the aperture of the hollow cavity that is positioned at reach through hole front portion; The mid-rear portion of described piston rod is hollow cylinder structure, the hollow cavity of described piston rod forms inside and outside double-deck oil duct by the inner catheter by front extending back being arranged in coaxial line mode in hollow cavity, the rear extending end of described inner catheter is installed in the hollow cavity of piston body, and forms drive fit relation with the hollow cavity wall that is positioned at reach through hole rear portion; One end of described 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 is connected, and V2 hydraulic fluid port connects to the rodless cavity of next adjacent oil hydraulic cylinder by connecting pipeline; One end of described outer oil duct is connected with the UNICOM's oil pocket being made up of the reach through hole that traverses piston body by the annular chamber between hollow cavity and inner catheter 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 is connected, and C2 hydraulic fluid port connects to the C1 hydraulic fluid port arranging on the oil gathering block of next adjacent oil hydraulic cylinder by connecting pipeline; On oil gathering block, be provided with K4 linked hole and K5 linked hole, wherein K5 linked hole is connected with the rod chamber of oil hydraulic cylinder all the time, and K4 linked hole is connected with the UNICOM's oil pocket being made up of the reach through hole that traverses piston body in the time that piston rod extend out to maximum travel position.
The opposite side oil duct junction corresponding with C1 hydraulic fluid port on oil gathering block is the enclosed construction that pressure transducer is installed.
Drainback passage for subsequent use when the effect of described one-way valve is to provide a series connection multi-hydraulic-cylinder to carry out retraction movement; One-way valve application scenarios is, in the time that oil hydraulic cylinder is carried out retracting motion, if be subject to the interference of unexpected load changing etc. and cause all the other certain oil hydraulic cylinders except last oil hydraulic cylinder first to bounce back, the normal retraction conducting oil duct of rear oil hydraulic cylinder rod chamber is just closed like this, makes rear oil hydraulic cylinder just cannot complete retraction movement; In such cases, one-way valve is opened and is that rear oil hydraulic cylinder is set up another UNICOM's oil duct under the effect of pressure oil, thereby makes rear several oil hydraulic cylinder can complete full retraction movement.
Working principle of the present invention is as follows:
Take the control of three series cylinder sequential movements as example illustrates concrete extend action order situation: stretch out when move and reaching structure desired location when first oil hydraulic cylinder does, thus in first oil hydraulic cylinder structure of the present invention automatically the oil return circuit of second oil cylinder of connection make second oil hydraulic cylinder start to do to stretch out motion; Stretch out when moving and reaching structure desired location when second oil cylinder does, stretch out motion thereby the oil return circuit that in second oil hydraulic cylinder, structure of the present invention is connected the 3rd oil cylinder automatically makes the 3rd oil hydraulic cylinder start to do; Above-mentioned stretching out in movement process, the oil hydraulic cylinder moving is not in the time that its piston moves to structure desired location, because the oil return circuit of its rear oil hydraulic cylinder is not switched on (being blocked), therefore can guarantee that the rear oil hydraulic cylinder that is doing the oil hydraulic cylinder that stretches out motion now can not do and stretch out motion, guarantee that with this multi-hydraulic-cylinder stretches out the reliability of realization order extend action control in movement process.
Implementation procedure for the control of multiple series cylinder sequential movements is the same, be that previous oil hydraulic cylinder stretches out to move and arrive automatically to connect just now the oil return circuit of adjacent next oil hydraulic cylinder behind regulation control point and adjacent next oil hydraulic cylinder is done and stretches out motion, stretch out motion until connect in turn the oil return circuit of last oil hydraulic cylinder and last oil hydraulic cylinder can be realized.
Beneficial effect of the present invention is as follows:
1, pressure loss is little, not perplexed by multistage sequence valve pressure drop.
2, not limited by oil hydraulic cylinder joint number, be particularly useful for multisection hydraulic cylinder system, or the sequentially-operating of complex system.
3,, without extra electric hydraulic peripheral cell, form structure is compact almost consistent with conventional oil hydraulic cylinder outward appearance.
4, in compact hydraulic system, reduce the requirement of exterior line layout to design and installation, also reduce 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.
Accompanying drawing explanation
Fig. 1 is structural drawing of the present invention.
Fig. 2 is that existing technology oil hydraulic cylinder order is opened control hydraulic schematic diagram.
Fig. 3 is existing technology tubular type sequence valve schematic diagram.
Fig. 4 is the structural drawing of piston in 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 oil hydraulic cylinder I is stretched out motion diagram.
Fig. 9 is that oil hydraulic cylinder II is stretched out motion diagram.
Figure 10 is oil hydraulic cylinder retraction movement figure.
Figure 11 is that folding arm crane 6 saves telescopic boom hydraulic schematic diagram.
Embodiment
The present invention is further described below with reference to embodiment's (accompanying drawing):
As shown in Fig. 1,4,5,6,7, of the present inventionly be applicable to control multiple oil hydraulic cylinders order and stretch out the oil hydraulic cylinder of motion, it comprises hydraulic cylinder 1, be arranged on the piston body 2 of the hollow cylinder structure in hydraulic cylinder, piston rod 7 with piston body front end Joint, be arranged on successively from front to back piston seal 3, piston seal 5 in the corresponding annular groove processing on piston body periphery, and be arranged on one-way valve 6 on piston body, be fixed in the oil gathering block 4 on hydraulic cylinder, on the piston body 2 between described piston seal 3 and piston seal 5, be processed with a reach through hole K1 who traverses piston body, on the piston body 2 of opposite side that is positioned at piston seal 5, be processed be communicated with piston body hollow cavity and oil hydraulic cylinder rod chamber X2 for the tapped hole K2 of one-way valve 6 is installed, the hollow cavity of described piston body 2 is step hole structure, and the aperture that is wherein positioned at the hollow cavity at reach through hole K1 rear portion is less than the aperture of the hollow cavity that is positioned at reach through hole K1 front portion, the mid-rear portion of described piston rod 7 is hollow cylinder structure, the hollow cavity of described piston rod 7 forms inside and outside double-deck oil duct Y1, Y2 by the inner catheter by front extending back being arranged in coaxial line mode in hollow cavity, the rear extending end of described inner catheter is installed in the hollow cavity of piston body 2, and forms drive fit relation with the hollow cavity wall that is positioned at reach through hole K1 rear portion, one end of described 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 is connected, and V2 hydraulic fluid port connects the rodless cavity X1 to next adjacent oil hydraulic cylinder by connecting pipeline, one end of described outer oil duct Y2 is connected with the oil pocket X3 of UNICOM being made up of the reach through hole K1 that traverses piston body by the annular chamber between hollow cavity and inner catheter at piston rod reach through hole rear portion, the C2 hydraulic fluid port of the other end and piston rod 7 front end settings is connected, and C2 hydraulic fluid port connects the C1 hydraulic fluid port arranging on the oil gathering block 4 of next adjacent oil hydraulic cylinder by connecting pipeline, described oil gathering block 4 is welded on hydraulic cylinder 1, on oil gathering block 4, be provided with K4 linked hole and K5 linked hole, wherein K5 linked hole is connected with the rod chamber X2 of oil hydraulic cylinder all the time, K4 linked hole is connected with the oil pocket X3 of UNICOM being made up of the reach through hole K1 that traverses piston body in the time that piston rod 7 extend out to maximum travel position, make the C1 hydraulic fluid port of oil hydraulic cylinder by K4 linked hole, the oil pocket X3 of UNICOM, manage interior rod chamber oil duct Y2 and be connected towards subordinate's rod chamber C2 hydraulic fluid port, also the hydraulic oil that with this understanding (when piston rod 7 reaches structure desired location) can realize between oil hydraulic cylinder C1 hydraulic fluid port and C2 hydraulic fluid port two-way circulates, the opposite side oil duct junction corresponding with C1 hydraulic fluid port on oil gathering block is the enclosed construction (not showing in the accompanying drawings) that pressure transducer is installed.
Stretch out in movement process (being that piston rod 7 does not stretch out and arrives structure desired location) at hydraulic cylinder piston rod 7, because the oil pocket X3 of UNICOM is by piston seal 3, hydraulic cylinder 1, piston seal 5 seals and can not be connected with K4 linked hole, therefore C1 hydraulic fluid port is through K4 linked hole, the oil pocket X3 of UNICOM and with lead to the path that two-way circulates that is connected of subordinate's rod chamber C2 hydraulic fluid port and be blocked, now owing to being subject to the restriction of one-way valve 6 one direction circulating functions, unique path between oil hydraulic cylinder C1 hydraulic fluid port and C2 hydraulic fluid port and flow of pressurized are to being: hydraulic oil enters oil gathering block 4 from C1 hydraulic fluid port and arrives K5 linked hole and enter rod chamber X2 through runner, in promoting piston 2 and driving the common execution retraction movement of piston rod 7, pressure oil is pushed one-way valve 6 open and is entered the interior rod chamber oil duct Y2 of pipe and flow to towards the rod chamber C2 of subordinate hydraulic fluid port, be communicated to again the C1 hydraulic fluid port of adjacent next oil hydraulic cylinder through exterior line, make next oil cylinder also can carry out retraction movement, requiring as one-way valve 6 one direction circulating functions, carry out and stretch out in the process of motion at multi-hydraulic-cylinder, the oil hydraulic cylinder moving does not allow hydraulic oil to enter rod chamber oil duct Y2 in pipe from C2 hydraulic fluid port in the other direction to flow through one-way valve 6 and flow to C1 hydraulic fluid port, as can be seen here, stretching out in movement process, the oil hydraulic cylinder that is doing extend action operation does not allow the hydraulic oil C1 that circulates from C2 hydraulic fluid port to hydraulic fluid port.
Structure concrete methods of realizing of the present invention and hydraulic principle are as follows:
Further introduce multiple series cylinder realization order of the present invention and stretch out the method (take two oil hydraulic cylinders as example) of motion control below in conjunction with accompanying drawing:
(1) oil hydraulic cylinder I start to stretch out motion and oil hydraulic cylinder II still remains static (as shown in Figure 8).
Stretch out in movement process in execution, high pressure oil is arrived oil hydraulic cylinder I hydraulic fluid port V1 and is entered the rodless cavity X1 of oil hydraulic cylinder I by exterior line I, at rodless cavity X1 place, the thrust of hydraulic oil is on piston 2 and make the piston rod 7 that piston 2 and piston 2 are positioned produce and stretch out motion to the right, and now, the mouth K5 of UNICOM of the oil gathering block 4 in oil hydraulic cylinder I of the hydraulic oil in 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, flow back to hydraulic system through the exterior line II being connected with C1 hydraulic fluid port again, thereby make oil hydraulic cylinder I form rodless cavity X1 oil-feed, the complete loops of rod chamber X2 oil return, therefore the piston rod 7 of oil hydraulic cylinder I can do to the right and stretch out motion under the thrust of aforementioned hydraulic oil, meanwhile, pressure can be passed to the hydraulic fluid port towards the rodless cavity V2 of subordinate by rodless cavity oil duct Y1 in the pipe in oil hydraulic cylinder I although act on the pressure oil at oil hydraulic cylinder I rodless cavity X1 place, and through arriving the hydraulic fluid port V1 place of oil hydraulic cylinder II and enter the rodless cavity X1 of oil hydraulic cylinder II with the exterior line III being connected towards subordinate's rodless cavity V2 hydraulic fluid port, at the rodless cavity X1 place of oil hydraulic cylinder II, although can producing one equally, the pressure of hydraulic oil make the piston rod 7 of oil hydraulic cylinder II produce the thrust of stretching out motion to the right, but now, the mouth K5 of UNICOM of the oil gathering block 4 in oil hydraulic cylinder II of the hydraulic oil in 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 be communicated to oil hydraulic cylinder I through the exterior line IV that is connected with C1 hydraulic fluid port again leads to the rod chamber C2 of subordinate hydraulic fluid port, in the pipe of oil hydraulic cylinder I, rod chamber oil duct Y2 arrives the oil pocket X3 of UNICOM in oil hydraulic cylinder I again, because the one-way valve 6 in oil hydraulic cylinder I now does not allow hydraulic oil to flow to rod chamber X2 from managing interior rod chamber oil duct Y2 through one-way valve 6, simultaneously also because the piston rod 7 of oil hydraulic cylinder I is doing in the process of stretching out motion, in oil hydraulic cylinder I, the oil pocket X3 of UNICOM of piston 2 fails align and be communicated with the K4 linked hole of oil gathering block 4 in oil hydraulic cylinder I, and at the hydraulic cylinder 1 of oil hydraulic cylinder I, piston seal 3, under piston seal 5 three's actings in conjunction, be closed, therefore the hydraulic oil in oil hydraulic cylinder II rod chamber X2 can not form loop this moment, the piston rod 7 of oil hydraulic cylinder II can not do and stretch out motion, known in conjunction with above analysis, under oil hydraulic cylinder application conditions of the present invention, when last oil hydraulic cylinder does in the process of stretching out motion, the connected oil hydraulic cylinder in its rear is guaranteed because oil return circuit is blocked to do to stretch out motion.
(2) oil hydraulic cylinder I is stretched out to move and is reached after position of rest, and oil hydraulic cylinder II side starts to start stretches out motion (as shown in Figure 9).
When the piston rod 7 of oil hydraulic cylinder I continues protruding and finally arrives after structure desired location under the pressure oil effect at rodless cavity X1 place, the oil pocket X3 of oil hydraulic cylinder I UNICOM and K4 linked hole are able to UNICOM, now the mouth K5 of UNICOM of the oil gathering block 4 in oil hydraulic cylinder II of the hydraulic oil in 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 be communicated to oil hydraulic cylinder I through the exterior line IV that is connected with C1 hydraulic fluid port leads to the rod chamber C2 of subordinate hydraulic fluid port, rod chamber oil duct Y2 in the pipe of oil hydraulic cylinder I again, the oil pocket X3 of UNICOM, the C1 hydraulic fluid port of K4 linked hole and oil hydraulic cylinder I is connected, the last again exterior line II that warp is connected with the C1 hydraulic fluid port of oil hydraulic cylinder I flows back to hydraulic system, thereby make oil hydraulic cylinder II form rodless cavity X1 oil-feed, the complete loops of rod chamber X2 oil return, therefore stretch out motion at previous oil hydraulic cylinder and arrive structure desired location, oil hydraulic cylinder II oil return circuit is by under the condition of UNICOM, the piston rod 7 of oil hydraulic cylinder II can do to the right and stretch out motion also until oil hydraulic cylinder II stops after stretching out motion arrival structure desired location under the thrust of aforementioned hydraulic oil.
In like manner, utilize the present invention can realize equally the order that multiple oil hydraulic cylinders stretch out movement process and stretch out control, and until last oil hydraulic cylinder stops after reaching structure desired location, whole Multi-cylinder order is stretched out movement process and finished.
(3) oil hydraulic cylinder retraction movement process (as shown in figure 10).
Oil hydraulic cylinder I, oil hydraulic cylinder II are in the time carrying out retraction movement, pressure oil arrives the oil gathering block 4 of oil hydraulic cylinder I by exterior line II, directly enter the rod chamber X2 of oil hydraulic cylinder I by K5 linked hole, and by pressure-acting in the diagram right side of oil hydraulic cylinder I piston 2, make the piston rod 7 of oil hydraulic cylinder I there is the trend of doing retraction movement left, meanwhile, the hydraulic oil entering in the oil gathering block 4 of oil hydraulic cylinder I also can directly be entered the oil pocket X3 of UNICOM and be arrived rod chamber oil duct Y2 in pipe by K4 linked hole, also can open one-way valve 6 by K5 linked hole simultaneously and arrive the interior rod chamber oil duct Y2(of pipe in the time that the oil pocket X3 of UNICOM seals), and arrive oil hydraulic cylinder I via rod chamber oil duct Y2 in pipe lead to the rod chamber C2 of subordinate hydraulic fluid port, arrive in the oil gathering block 4 of oil hydraulic cylinder II through exterior line IV again, in oil gathering block 4 inside of oil hydraulic cylinder II, hydraulic oil directly enters the rod chamber X2 of oil hydraulic cylinder II by the K5 linked hole of oil hydraulic cylinder II, and by pressure-acting in the diagram right side of oil hydraulic cylinder II piston 2, make the piston rod 7 of oil hydraulic cylinder II there is the trend of doing retraction movement left, for low pressure oil return circuit, hydraulic oil in oil hydraulic cylinder II rodless cavity X1 is through V1 hydraulic fluid port and exterior line III UNICOM and arrive oil hydraulic cylinder I towards the rodless cavity V2 of subordinate hydraulic fluid port, in the pipe of oil hydraulic cylinder I, rodless cavity oil duct Y1 arrives oil hydraulic cylinder I rodless cavity X1 again, in the rodless cavity X1 of oil hydraulic cylinder I, the reflux liquid force feed of oil hydraulic cylinder II and the reflux liquid force feed of oil hydraulic cylinder I reflux and warp flows back to hydraulic system with the exterior line I that the V1 hydraulic fluid port of oil hydraulic cylinder I is connected, 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, therefore oil hydraulic cylinder I, the piston rod 7 of 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 aspect below in conjunction with Figure 11.
In Figure 11, hydraulic oil arrives selector valve through oil pump, and when selector valve switches to left position, high-voltage oil liquid arrives the rodless cavity of oil hydraulic cylinder 1, arrive the rodless cavity of next stage oil hydraulic cylinder by the inner oil duct of rod chamber of oil hydraulic cylinder 1, until the rodless cavity of final section oil hydraulic cylinder 6.Six joint oil hydraulic cylinder rodless cavities are cascaded by pipeline, the conducting all the time of whole process.Return line is cascaded by the inside oil duct of rod chamber.Stretch out in 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, when reaching after oil hydraulic cylinder 1 breakout pressure, oil hydraulic cylinder 1 starts to stretch out.In the time that oil hydraulic cylinder 1 execution is stretched out motion and runs to stroke end, the rod chamber oil return circuit side conducting of oil hydraulic cylinder 2, the piston rod of oil hydraulic cylinder 2 starts to stretch out and runs to stroke end until oil hydraulic cylinder 2 stretches out, subsequently, the lower joint oil hydraulic cylinder rod chamber return line that be connected adjacent with oil hydraulic cylinder 2 could be opened and start oil hydraulic cylinder 3 and carried out and stretch out motion.The above-mentioned movement control mode of stretching out repeats to realize until oil hydraulic cylinder 6 stretches out completely, stretches out process thereby complete the order that folding arm crane 6 saves telescopic boom.
Claims (1)
1. one kind is applicable to control multiple oil hydraulic cylinders order and stretches out the oil hydraulic cylinder of motion, it is characterized in that: it comprises hydraulic cylinder, be arranged on the piston body of the hollow cylinder structure in hydraulic cylinder, piston rod with piston body front end Joint, be arranged on successively from front to back the sealing of first piston in the corresponding annular groove processing on piston body periphery, the second piston seal, and be arranged on one-way valve on piston body, be fixed in the oil gathering block on hydraulic cylinder; On the piston body between the sealing of described first piston and the second piston seal, be processed with a reach through hole that traverses piston body, on the piston body of opposite side that is positioned at the second piston seal, be processed with connection piston body hollow cavity and oil hydraulic cylinder rod chamber for the tapped hole of one-way valve is installed; The hollow cavity of described piston body is step hole structure, and the aperture that is wherein positioned at the hollow cavity at reach through hole rear portion is less than the aperture of the hollow cavity that is positioned at reach through hole front portion; The mid-rear portion of described piston rod is hollow cylinder structure, the hollow cavity of described piston rod forms inside and outside double-deck oil duct by the inner catheter by front extending back being arranged in coaxial line mode in hollow cavity, the rear extending end of described inner catheter is installed in the hollow cavity of piston body, and forms drive fit relation with the hollow cavity wall that is positioned at reach through hole rear portion; One end of described 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 is connected, and V2 hydraulic fluid port connects to the rodless cavity of next adjacent oil hydraulic cylinder by connecting pipeline; One end of described outer oil duct is connected with the UNICOM's oil pocket being made up of the reach through hole that traverses piston body by the annular chamber between hollow cavity and inner catheter 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 is connected, and C2 hydraulic fluid port connects to the C1 hydraulic fluid port arranging on the oil gathering block of next adjacent oil hydraulic cylinder by connecting pipeline; On oil gathering block, be provided with K4 linked hole and K5 linked hole, wherein K5 linked hole is connected with the rod chamber of oil hydraulic cylinder all the time, and K4 linked hole is connected with the UNICOM's oil pocket being made up of the reach through hole that traverses piston body in the time that piston rod extend out to maximum travel position.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| 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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| 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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| CN102619805A CN102619805A (en) | 2012-08-01 |
| CN102619805B true CN102619805B (en) | 2014-05-21 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN106979186B (en) * | 2017-04-17 | 2019-01-25 | 宁波江北宇洲液压设备厂 | A kind of logical valve by the flexible sequence of mechanical structure control oil 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 |
| CN109751966B (en) * | 2019-01-29 | 2021-09-10 | 广东睿住住工科技有限公司 | Hydraulic clamping system, vibrating device and detection method of hydraulic clamping system |
| CN110294065B (en) * | 2019-04-30 | 2020-09-22 | 武汉船用机械有限责任公司 | Load test tool |
| CN110762072B (en) * | 2019-11-05 | 2022-02-15 | 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 |
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| US3031853A (en) * | 1960-09-21 | 1962-05-01 | Westinghouse Air Brake Co | Multi-position fluid motor and control apparatus therefor |
| CN201968172U (en) * | 2011-03-01 | 2011-09-14 | 吉林大学 | Energy storage counterpressure type large-scale dynamic audience platform for special effect movie |
| CN202264719U (en) * | 2011-10-20 | 2012-06-06 | 徐州重型机械有限公司 | Composite action hydraulic control system and wheeled engineering machine with same |
| CN202520687U (en) * | 2012-04-27 | 2012-11-07 | 郑州宇通重工有限公司 | Hydraulic cylinder suitable for controlling sequential extension movement of multiple hydraulic cylinders |
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- 2012-04-27 CN CN201210126559.XA patent/CN102619805B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3031853A (en) * | 1960-09-21 | 1962-05-01 | Westinghouse Air Brake Co | Multi-position fluid motor and control apparatus therefor |
| CN201968172U (en) * | 2011-03-01 | 2011-09-14 | 吉林大学 | Energy storage counterpressure type large-scale dynamic audience platform for special effect movie |
| CN202264719U (en) * | 2011-10-20 | 2012-06-06 | 徐州重型机械有限公司 | Composite action hydraulic control system and wheeled engineering machine with same |
| CN202520687U (en) * | 2012-04-27 | 2012-11-07 | 郑州宇通重工有限公司 | Hydraulic cylinder suitable for controlling sequential extension movement of multiple hydraulic cylinders |
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| CN102619805A (en) | 2012-08-01 |
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