CN104100583B - A kind of dumper Combined hydraulic system - Google Patents
A kind of dumper Combined hydraulic system Download PDFInfo
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- CN104100583B CN104100583B CN201410316094.3A CN201410316094A CN104100583B CN 104100583 B CN104100583 B CN 104100583B CN 201410316094 A CN201410316094 A CN 201410316094A CN 104100583 B CN104100583 B CN 104100583B
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Abstract
The present invention relates to a kind of dumper Combined hydraulic system, including fuel tank, pump, oil cylinder combination and power takeoff, described power takeoff is connected fixing with pump, the combination of described oil cylinder includes multi-stage expansion cylinder, described multi-stage expansion cylinder and a piston assembly connect, described multi-stage expansion cylinder and piston assembly are arranged on the both sides within piston bore, and contact with each other；Described piston assembly includes an extensible member and a piston, and described extensible member is arranged in the cavity of described multi-stage expansion cylinder, and described piston is fixed on described extensible member, and described piston is fitted with piston bore；Described extensible member and the end cap being arranged on piston bore end fix.In dumper Combined hydraulic system of the present invention, multi-stage expansion cylinder and piston assembly are combined, oil cylinder supports overcoat and becomes piston/cylinder, use the cylinder barrel of Multi-stage cylinder as piston rod, oil cylinder weight can be effectively reduced, reduce build, reduce dumper Combined hydraulic system pressure, extend the hydraulic system life-span.
Description
Technical field
The present invention relates to dumper field, particularly relate to a kind of dumper Combined hydraulic system with telescoping cylinder.
Background technology
Dumper Combined hydraulic system of the prior art the most all includes that fuel tank, pump and hydraulic cylinder, fuel tank and pump provide power to hydraulic cylinder, and the additional act of dumper is just controlled by ratio.In dumper field, general employing multi-stage expansion oil cylinder, multistage flexible cylinder barrel is set in cylinder shell, operationally, shell and end cap are only played a supporting role, and the multi-stage expansion cylinder barrel of enclosure, under the effect of hydraulic oil, successively stretches out according to the size of telescopic oil cylinder area of section.
As, Chinese patent " horizontal oil cylinder with guide slot ", publication number: 201843854U, publication date, 2011-05-25, disclose a kind of horizontal oil cylinder with guide slot, being built-in with cylinder barrel II at cylinder barrel I, one end of cylinder barrel II is welded with piston I, is provided with fairlead I between the other end and the inwall of cylinder barrel I of cylinder barrel II；Being built-in with piston rod at cylinder barrel II, one end of piston rod is welded with piston I I, is provided with fairlead II between the other end and the inwall of cylinder barrel II of piston rod.
In the oil cylinder described in above-mentioned patent, cylinder barrel shell is only played a supporting role, and the cross-sectional diameter of cylinder barrel shell own is bigger, the weight of shell own is the heaviest, and this kind of design causes the weight of oil cylinder itself relatively greatly, owing to cylinder barrel shell itself can not extend, the build of oil cylinder is bigger, for whole dumper Combined hydraulic system, work system starting pressure is higher, and system stability is poor.
In view of drawbacks described above, creator of the present invention obtains this creation finally through research for a long time and practice.
Summary of the invention
It is an object of the invention to provide a kind of dumper Combined hydraulic system, in order to overcome above-mentioned technological deficiency.
For achieving the above object, the present invention provides a kind of dumper Combined hydraulic system, including fuel tank, pump, oil cylinder combination and power takeoff, connecting between above-mentioned fuel tank and pump and have low pressure pipe, connecting between pump and oil cylinder combine has flowline, and above-mentioned power takeoff is connected fixing with pump, the combination of above-mentioned oil cylinder includes multi-stage expansion cylinder, above-mentioned multi-stage expansion cylinder and a piston assembly connect, and above-mentioned multi-stage expansion cylinder and piston assembly are arranged on the both sides within piston bore, and contact with each other；
Above-mentioned piston assembly includes an extensible member and a piston, and above-mentioned extensible member is arranged in the cavity of above-mentioned multi-stage expansion cylinder, and above-mentioned piston is fixed on above-mentioned extensible member, and above-mentioned piston is fitted with piston bore；Above-mentioned extensible member and the end cap being arranged on piston bore end fix；
Above-mentioned piston assembly and multi-stage expansion cylinder successively realize the elongation of oil cylinder, under the effect of hydraulic oil, above-mentioned extensible member drives piston elongation, above-mentioned piston promotes above-mentioned piston bore to extend simultaneously, when above-mentioned piston bore is elongated to precalculated position, above-mentioned multi-stage expansion cylinder extends under the promotion of hydraulic oil step by step.
Further, above-mentioned extensible member is a locking stroke lever, is hollow cavity in the middle part of above-mentioned locking stroke lever, and when oil cylinder combination is in contraction state, above-mentioned locking stroke lever is predominantly located in cavity；
Sidepiece at above-mentioned locking stroke lever two ends is respectively provided with the first oilhole and the second oilhole, in order to make oil circuit control flow in the hollow cavity of above-mentioned locking stroke lever.
Further, the first oilhole end of above-mentioned locking stroke lever arranges a locking unit, and it combines with the end of the piston rod that above-mentioned piston is connected, and when above-mentioned locking stroke lever runs to the position of maximum, closes above-mentioned first oilhole.
Further, above-mentioned locking unit is the protruding end being arranged on above-mentioned locking stroke boom end, and above-mentioned piston rod end arranges recess, and above-mentioned protruding end can be fastened on above-mentioned piston rod end.
Further, above-mentioned piston rod is socketed in the end of locking stroke lever, and above-mentioned piston is connected to the outside of above-mentioned piston rod, and above-mentioned locking stroke lever, piston rod and piston are fixed successively.
Further, the side of above-mentioned piston is above-mentioned multi-stage expansion cylinder, the cross-sectional diameter of its outermost telescoping cylinder is slightly less than the diameter of piston, the end of the telescoping cylinder inside and the ends contact of piston, above-mentioned piston rod, piston, lateral expansion cylinder and locking stroke lever collectively form airtight cavity, in order to drive piston and locking stroke lever elongation.
Further, the external stability of above-mentioned piston bore is on bearing, arrange a limiting section in the end that above-mentioned piston bore and bearing fix, the internal diameter of above-mentioned limiting section is less than the internal diameter of piston bore, and forms a positioning step between above-mentioned limiting section and piston bore.
Further, said pump connects with valve composition pump valve combination, oil road and a flowline of pump valve combination；Also setting up a high-pressure oil pipe, its input connects oil pump outlet line, and outfan connects valve oil inlet pipe；Arranging pump turnover oil pipe on pump, it is connected with low pressure pipe, arranges a valve flowline on valve, and it is connected with flowline；Being additionally provided with oil return pipe at valve inner, this oil return pipe communicating valve and the turnover oil pipe of pump, when valve body oil return, hydraulic oil is in oil return pipe flows into turnover oil pipe.
Further, above-mentioned bearing is fixed on vehicle component, and moves with vehicle component；
The rear end of above-mentioned piston bore is also connected with a connecting seat；
Arranging one on the end cap of above-mentioned piston bore front end and fix nut, above-mentioned locking stroke lever is fixed by above-mentioned fixing nut with end cap.
Further, the outside of above-mentioned piston rod arranges gear edge, in order to position above-mentioned piston；Arranging fixed part in piston rod rear end, fixation portions connects has piston to fix nut, in order to fixing above-mentioned piston；Installing piston between fixation portions and gear edge, the diameter of fixation portions is slightly less than the diameter installed at piston.
The beneficial effects of the present invention is compared with prior art: dumper Combined hydraulic system of the present invention uses multi-stage expansion cylinder and the pump valve combinative structure of improvement, multi-stage expansion cylinder and piston assembly are combined, oil cylinder supports overcoat and becomes piston/cylinder, use the cylinder barrel of Multi-stage cylinder as piston rod, oil cylinder weight can be effectively reduced, reduce build, reduce dumper Combined hydraulic system pressure, extend the hydraulic system life-span.
Making full use of the flexible of oil cylinder urceolus in the present invention, reduce the integral diameter of oil cylinder, under the effect of the hydraulic oil of same equal pressure, promote the pressure of cylinder efficient to be substantially reduced, oil cylinder elongation is stable.
Owing to the oil cylinder of the present invention combines traditional cylinder shell as piston bore, greatly reduce the overall weight of oil cylinder, therefore the combination of the oil cylinder of the present invention can be applicable in discharging vehicle, it is possible to decrease the overall weight of discharging vehicle, be substantially reduced steel usage amount.Meanwhile, oil cylinder is lighter, saves oil consumption, it is simple to be combined with discharging vehicle.
The present invention arranges location division and positioning step on piston cylinder cylinder barrel, it is possible to be further ensured that location and the safe operation of oil cylinder.
At above-mentioned locking stroke lever the first oilhole end, locking unit is set, locking unit is when above-mentioned locking stroke lever runs to the position of maximum, and the first oilhole is closed, it is achieved spacing and stop, avoid piston bore rapid elongation to cause the damage to oil cylinder combination, further increase the stability of system.
Accompanying drawing explanation
Fig. 1 is the structural representation of the embodiment of the present invention one dumper Combined hydraulic system；
Fig. 2 is the structural representation of the pump valve combination in the embodiment of the present invention one；
Fig. 3 is the sectional structure schematic diagram of the oil cylinder combination in the present invention；
Fig. 4 be in the present invention oil cylinder combination face structural representation；
Fig. 5 is the sectional structure schematic diagram of the piston assembly in the present invention；
Fig. 6 is the sectional view at the piston bore bearing during locking stroke lever extreme position in the present invention；
Fig. 7 is the sectional structure schematic diagram of the multi-stage expansion cylinder in the present invention；
Fig. 8 is the structural representation of the embodiment of the present invention two dumper Combined hydraulic system.
Detailed description of the invention
Below in conjunction with accompanying drawing, to the present invention, above-mentioned and other technical characteristic and advantage are described in more detail.
Dumper Combined hydraulic system of the present invention uses fuel tank, pump and the combination of oil cylinder, it is achieved the lifting of dumper and landing.
Embodiment one
Refer to shown in Fig. 1, it is the structural representation of the embodiment of the present invention one dumper Combined hydraulic system, Combined hydraulic system in the present invention includes fuel tank 101, pump valve combined assembly 105, oil cylinder combination 117, low-pressure hydraulic oil in fuel tank 101 is converted into high pressure liquid force feed and transmits to oil cylinder combination 117 through high-pressure oil pipe 108 by pump valve combined assembly 105, in the present invention, this Combined hydraulic system is arranged on dumper, oil cylinder combination 117 is combined with the tipping bucket of dumper, in order to lift or to fall this tipping bucket after rise.In the present embodiment, use pump valve combined assembly 105 that low-pressure hydraulic oil is changed, it is possible to use Normal hydraulic oil pump, and be connected with fuel tank, hydraulic cylinder by hydraulic circuit respectively, control valve is set between hydraulic oil pump and hydraulic cylinder.
In the present invention, fuel tank 101 top arranges oiling intake and exhaust combination 110, in order to refuel fuel tank 101 and air inlet, aerofluxus；Arranging oil-out in fuel tank 101 bottom, this oil-out connects a low pressure pipe 104, arranges a ball valve 102, in order to block and to open oil circuit, the low pressure pipe at ball valve 102 also sets up folder and pounds 103 between this low pressure pipe 104 and fuel tank 101.Above-mentioned low pressure pipe 104 connects fuel tank 101 and pump valve combination 105, and fuel tank 104 combines pump 106 fuel feeding in 105 by this low pressure pipe 104 to pump valve, and, when oil return, low-pressure hydraulic oil is transmitted back to fuel tank 101.
Oil road 108a and a flowline 108 of pump valve combination 105 connect, by in high pressure liquid force feed transmission to oil cylinder combination 117, in the present embodiment, pump valve combination 105 is controlled by proficiency poppet-valve assembly 114, this portable valve assembly 114 is pneumatic control mode, it is provided with trachea 113, in order to be connected with the control hole on the valve 109 in pump valve combination 105, realizes the control to oil circuit by control valve 109.
In the present invention, this Combined hydraulic system can be used for the lifting process of dumper, thus, pump valve combination 105 is connected with a power takeoff 112 by connector 107, the power shaft of power takeoff 112 with pump 106 is connected by the way of spline housing by connector 107, and in the present embodiment, power takeoff 112 is arranged on outside dumper change speed gear box or on clutch, obtain power from certain gear of change speed gear box or clutch, power takeoff 112 drive high-pressure oil pump to complete lifting action for dumper.
In the present embodiment, connection support 116 is set in oil cylinder combination 117, fixing in order to be connected with the tipping bucket of dumper, in the bottom of oil cylinder combination 117, chassis overhang 115 is set, it is connected fixing with the chassis of dumper, and, connect support 116 and ground disc carrier 115 exists in pairs, it is arranged symmetrically with, to ensure the balance of oil cylinder combination 117.
Referring to shown in Fig. 2, it is the structural representation of the pump valve combination in the embodiment of the present invention one, and the pump valve in the present invention combines and arranges a high-pressure oil pipe 111 in 105, and its input connects oil pump outlet line 111a, and outfan connects valve oil inlet pipe 111b；Arranging pump turnover oil pipe 104a on pump 106, it is connected with low pressure pipe 104, arranges a valve flowline 108a on valve 109, and it is connected with flowline 108；Being additionally provided with oil return pipe at valve inner, this oil return pipe communicating valve and the turnover oil pipe 104a of pump, when valve body oil return, hydraulic oil is in oil return pipe flows into turnover oil pipe 104a.
Multi-stage expansion cylinder and piston assembly are combined by the oil cylinder combination in the present invention, and oil cylinder supports overcoat and becomes piston/cylinder, uses the cylinder barrel of Multi-stage cylinder as piston barrel, oil cylinder weight can be effectively reduced, reduce build, reduce system pressure, extend the hydraulic system life-span.
Referring to shown in Fig. 3, its sectional structure schematic diagram combined for oil cylinder of the present invention, in the present invention, oil cylinder combination 117 includes multi-stage expansion cylinder 24 and piston assembly；Multi-stage expansion cylinder 24 and piston assembly are arranged on the both sides of the inside of piston bore 1, and contact with each other；
It it is cavity 11 in the middle part of multi-stage expansion cylinder 24；Piston assembly includes an extensible member, piston rod 10 and a piston 3, and extensible member is arranged in cavity 11, and piston 3 is fixed on extensible member；And piston 3 is fitted with piston bore 2；Extensible member and the end cap 7 being arranged on piston bore 2 end fix；Piston assembly and multi-stage expansion cylinder 24 successively realize the elongation of oil cylinder, under the effect of hydraulic oil, extensible member drives piston 3 to extend, and piston 3 promotes piston bore 2 to extend simultaneously, when piston bore 2 is elongated to precalculated position, multi-stage expansion cylinder 24 extends under the promotion of hydraulic oil step by step.
In the present invention, piston 3 is arranged on the one end within piston bore 2, and at this end, piston 3 acts against the inner side of end cap 7, and end cap 7 is fixed on piston bore 2, and operationally, active force is applied on end cap 7 by piston 3, and then drives whole piston bore 2 to stretch out.Arranging piston packing 8 between piston 3 and piston bore 2 to seal, the both ends contacted with piston bore 2 at piston 3 also set up guide collar 9.
The opposite side of piston 3 is multi-stage expansion cylinder 24, the cross-sectional diameter of its outermost slip expansion cylinder is slightly less than the diameter of piston 3, the end of the slip expansion cylinder inside and the ends contact of piston, piston rod 10, piston 3, inner barrel telescoping cylinder and extensible member collectively form airtight cavity 11, the hydraulic oil entering this cavity 11 produces high pressure, first drives extensible member action.
Refer to shown in Fig. 4, it faces structural representation for what oil cylinder of the present invention combined, owing to the oil cylinder of the present invention combines traditional cylinder shell as piston bore, greatly reduce the overall weight of oil cylinder, therefore the combination of the oil cylinder of the present invention can be applicable in discharging vehicle, the overall weight of discharging vehicle can be reduced, be substantially reduced steel usage amount.Meanwhile, oil cylinder is lighter, it is simple to be combined with discharging vehicle.Oil cylinder combination is not provided with the rear end of piston 3 and is connected with a connecting seat 22, this connection seat 22 is arranged on vehicle component, a bearing 21 is connected at the middle part of piston bore 2, when piston bore 2 moves, bearing 21 moves the most therewith, bearing 21 is connected on flip component or the dip member of vehicle, on the tipping bucket of dumper；Bearing 21 arranges crash roll 25.
The piston bore connected between seat 22 and bearing 21 arranges pouring orifice 29, the hydraulic oil in hydraulic circuit is injected in oil cylinder.
Refer to shown in Fig. 5, it is the sectional structure schematic diagram of inventive piston molectron, in the present invention, extensible member drives piston 3 to move, in the present embodiment, extensible member is a locking stroke lever 1, and the middle part of locking stroke lever 1 is hollow cavity, sidepiece at its two ends is respectively provided with the first oilhole 14 and the second oilhole 15, and hydraulic oil flows in this hollow cavity back and forth；In the present embodiment, when oil cylinder combination is in retracted position, in the cavity being predominantly located in multi-stage expansion cylinder 24 of locking stroke lever 1；When oil cylinder combination is in very big telescopic location, locking stroke lever 1, piston rod 10 and the closed end of telescoping cylinder inner cylinder.
Arranging fixing nut 6 at locking stroke lever 1 with one end that piston 3 is combined, fixing nut 6 is fixed on the outside of end cap 7, and locking stroke lever is fixed on end cap 7 by it, fixes and also sets up bonded washer 5 between nut 6 and end cap 7.
Piston rod 10 is directly socketed in the end of locking stroke lever 1, and piston 3 is connected to the outside of piston rod 10, and locking stroke lever 1, piston rod and piston 3 are fixed successively.
Owing to the internal diameter of the hollow cavity of the locking stroke lever 1 in the present invention is the least, therefore its pressure promoting piston to produce is the biggest, for avoiding piston bore 2 elongation to cause the damage to oil cylinder combination, the first oilhole end at locking stroke lever 1 arranges locking unit, locking unit, when locking the position that stroke lever 1 runs to maximum, is combined with the end of piston rod, the medial wall laminating of the first oilhole 14 and piston rod 10, first oilhole 14 is closed, it is achieved spacing and stop.
In the present embodiment, locking unit is the protruding end 1b being arranged on locking stroke lever 1 end 1a, is interlocked at the recess 18 of piston rod 10 leading section 10a, protruding end 1b and recess 18, after both contact, it is possible to stop hydraulic oil to enter in the intermediate throughholes of piston rod 10.
The setting of this locking unit can effectively realize locking the self-locking of stroke lever and spacing, it is ensured that the stability of oil cylinder combination.
The outside of piston rod 10 arranges gear edge, in order to position piston 3；Arranging fixed part in piston rod 3 rear end, fixed part connects has piston to fix nut 33, in order to fixed piston 3, installs piston 3 between fixed part and gear edge, and the diameter of fixed part is slightly less than the diameter installed at piston 3.
As the alternative of the present embodiment, the oil inlet end at locking stroke lever can use the steel wire rope of connection, or locking stroke lever is replaced by steel wire rope；Further, locking stroke lever can be rigid rod or rods.
Referring to shown in Fig. 6, it locks the sectional view at piston bore bearing during stroke lever extreme position for the present invention, and in the present embodiment, locking stroke lever is capable of the locking of oil circuit, stops the continuation campaign of piston.
As the another way of realization location, as shown in Figure 4, arranging a limiting section 32 in the end that piston bore 2 and bearing 21 fix, the internal diameter of limiting section is less than the internal diameter of piston bore, and forms a positioning step 31 between limiting section 32 and piston bore 2；When piston bore 2 moves to extreme position, piston 3 and positioning step 31 against.
Further, when using positioning step 31 and locking stroke lever 1, between piston 3 and positioning step 31, leave gap simultaneously, under the common effect of hydraulic oil and positioning step 31, piston 3 stop motion, it is achieved location.In the present embodiment, the height of positioning step can set according to concrete oil cylinder working-pressure with the thickness of limiting section 32.
In the present invention, locking stroke lever 1 can be separately provided with positioning step 31, it is possible to combining setting, it is when being combined as being used together, and positioning step 31 plays the effect of secondary safeguard protection.
In order to realize locking the self-locking of stroke lever 1, in its cavity or end can arrange a spherical keeper, through a spring it on, under the action of the spring, spherical keeper with lock stroke lever or piston-rod end contacts and closes.
Referring to shown in Fig. 7, it is the sectional structure schematic diagram of multi-stage expansion cylinder of the present invention, every grade of slip expansion cylinder of multi-stage expansion cylinder 24 arranges oil inlet end 25, and all communicates with cavity 11.When piston bore 2 reaches maximum travel position, hydraulic oil promotes the elongation of outermost slip expansion cylinder, and then drives the motion of inner stages slip expansion cylinder successively.
The work process of dumper Combined hydraulic system of the present invention is: when needing dumper to need to lift tipping bucket, operation controls control valve control power takeoff 112 and works, and then power takeoff 112 drives pump valve combination 105 work, pump 106 rotates, low-pressure hydraulic oil is sucked by low pressure pipe 104 from fuel tank 101, and transmitted to valve 109 by high-pressure oil pipe 111, high pressure liquid force feed is entered oil cylinder combination 117 by valve 109 from flowline 108；Hydraulic oil injects from pouring orifice 29, enters in cavity 11, and owing to the intracavity diameter of locking stroke lever 1 is the least, hydraulic oil is entered in locking stroke lever 1 by the first oilhole 14, and produces rapidly high pressure, promotes piston 3 and piston bore 2 to extend；When the locking unit locking stroke lever 1 end contacts with the second locking unit on piston rod 10, the oil circuit between the first oilhole 14 and cavity 11 blocks, and locks stroke lever stop motion；High pressure liquid force feed and then promotion outermost slip expansion cylinder elongation, then drive the elongation of inner stages slip expansion cylinder, when reaching maximum position, pouring orifice 29 fuel cut-off successively.
Under external force, the such as effect of dumper tipping bucket weight, piston bore is acted on by retraction force, and oil cylinder combination, according to the order retraction contrary with above-mentioned elongation process, is eventually returned in situ；Meanwhile, hydraulic oil flows out from the pouring orifice 29 of oil cylinder combination 117, in flowline 108 flows back to pump valve combination 105, and then flows back to fuel tank from low pressure pipe 104 again.
In the present invention, portable valve assembly 114 can be with the break-make of control valve 109, when valve 109 is in open position, owing to valve 109 and pump 106 are integrated, hydraulic oil refluxes between pump valve combines, keeping the idle running of pump 106, without draining in fuel tank 101, in pipeline, hydraulic fluid pressure maintains relatively low degree.
Making full use of the flexible of oil cylinder urceolus in the present invention, reduce the integral diameter of oil cylinder, under the effect of the hydraulic oil of same equal pressure, promote the pressure of cylinder efficient to be greatly improved, oil cylinder elongation is rapidly.
Embodiment two
Referring to shown in Fig. 8, it is the structural representation of the embodiment of the present invention two dumper Combined hydraulic system.Unlike the embodiments above is, the operating pressure of pump valve combined assembly is big, pump valve combined assembly arranges two turnover oil pipe 104a, two oil inlet and outlet 101a are set on fuel tank 101 accordingly, connect between turnover oil pipe 104a and oil inlet and outlet 101a and have low pressure pipe 104, arranging a valve flowline on valve 109, it is connected with flowline 108, provides hydraulic oil to executive item；Accordingly, being additionally provided with a valve oil return pipe at valve inner, this oil return pipe communicating valve and the turnover oil pipe 104a of pump, when valve body oil return, hydraulic oil is in valve oil return pipe flows into turnover oil pipe 104a.
Arranging valve flowline 108a on valve 109, it is connected with flowline 108, and flowline 108 other end is connected with oil cylinder combination 117.
The foregoing is only presently preferred embodiments of the present invention, be merely illustrative for invention, and nonrestrictive.Those skilled in the art understands, it can be carried out many changes, amendment, even equivalence, but fall within protection scope of the present invention in the spirit and scope that invention claim is limited.
Claims (5)
1. a dumper Combined hydraulic system, including fuel tank (101), pump (106), oil cylinder combination (117) and power takeoff (112), connect between described fuel tank (101) and pump (106) and have low pressure pipe (104), combine to connect between (117) at pump (106) and oil cylinder and have flowline (108), described power takeoff (112) is connected fixing with pump (106), it is characterized in that, described oil cylinder combination (117) includes multi-stage expansion cylinder (24), described multi-stage expansion cylinder (24) is connected with a piston assembly, described multi-stage expansion cylinder (24) and piston assembly are arranged on the both sides that piston bore (2) is internal, and contact with each other；Described piston assembly includes an extensible member and a piston (3), described extensible member is arranged in the cavity (11) of described multi-stage expansion cylinder (24), described piston (3) is fixed on described extensible member, and described piston (3) is fitted with piston bore (2)；Described extensible member and the end cap (7) being arranged on piston bore (2) end fix；Described piston assembly and multi-stage expansion cylinder (24) successively realize the elongation of oil cylinder, under the effect of hydraulic oil, described extensible member drives piston (3) elongation, described piston (3) promotes described piston bore (2) to extend simultaneously, when described piston bore (2) is elongated to precalculated position, described multi-stage expansion cylinder (24) extends under the promotion of hydraulic oil step by step；
Described extensible member is a locking stroke lever (1), described locking stroke lever (1) middle part is hollow cavity, when oil cylinder combination is in contraction state, described locking stroke lever (1) is predominantly located in cavity (11)；Sidepiece at described locking stroke lever (1) two ends is respectively provided with the first oilhole (14) and the second oilhole (15), in order to make oil circuit control flow in the hollow cavity of described locking stroke lever (1)；
First oilhole end of described locking stroke lever (1) arranges a locking unit, it combines with the end of the piston rod (10) that described piston (3) is connected, when described locking stroke lever (1) runs to the position of maximum, close described first oilhole (14)；
Described locking unit is the protruding end (1b) being arranged on described locking stroke lever (1) end, described piston rod (10) end arranges recess (18), and described protruding end (1b) can be fastened on described piston rod (10) end；
Described piston rod (10) is socketed in the end of locking stroke lever (1), described piston (3) is connected to the outside of described piston rod (10), and described locking stroke lever (1), piston rod (10) and piston (3) are fixed successively；
The side of described piston (3) is described multi-stage expansion cylinder (24), the cross-sectional diameter of its outermost telescoping cylinder is slightly less than the cross-sectional diameter of piston (3), the end of the telescoping cylinder inside and the ends contact of piston (3), described piston rod (10), piston (3), lateral expansion cylinder and locking stroke lever (1) collectively form airtight cavity, in order to drive piston (3) and locking stroke lever (1) elongation.
Dumper Combined hydraulic system the most according to claim 1, it is characterized in that, the external stability of described piston bore (2) is on bearing (21), the end fixed at described piston bore (2) and bearing (21) arranges a limiting section (32), the internal diameter of described limiting section (32) is less than the internal diameter of piston bore (2), and forms a positioning step between described limiting section (32) and piston bore (2).
Dumper Combined hydraulic system the most according to claim 2, it is characterized in that, described pump (106) and valve (109) composition pump valve combination (105), the oil road (108a) of pump valve combination (105) is connected with a flowline (108)；Also setting up a high-pressure oil pipe (111), its input connects oil pump outlet line (111a), and outfan connects valve oil inlet pipe (111b)；Arranging pump turnover oil pipe (104a) on pump (106), it is connected with low pressure pipe (104), arranges a valve flowline on valve (109), and it is connected with flowline (108)；Being additionally provided with oil return pipe at valve inner, this oil return pipe communicating valve and pump turnover oil pipe (104a), when valve body oil return, hydraulic oil is in oil return pipe inflow pump turnover oil pipe (104a).
Dumper Combined hydraulic system the most according to claim 3, is characterized in that, described bearing (21) is fixed on vehicle component, and moves with vehicle component；The rear end of described piston bore (2) is also connected with a connecting seat (22)；Arranging one on the end cap (7) of described piston bore (2) front end and fix nut (6), described locking stroke lever (1) is fixed by described fixing nut (6) with end cap (7).
Dumper Combined hydraulic system the most according to claim 4, is characterized in that, the outside of described piston rod (10) arranges gear edge, in order to position described piston (3)；Arranging fixed part in piston rod (10) rear end, described fixed part connects has piston to fix nut (33), in order to fixing described piston (3)；Installing piston (3) between described fixed part and gear edge, the diameter of described fixed part is slightly less than the diameter installing piston (3) place.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410316094.3A CN104100583B (en) | 2014-07-04 | 2014-07-04 | A kind of dumper Combined hydraulic system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410316094.3A CN104100583B (en) | 2014-07-04 | 2014-07-04 | A kind of dumper Combined hydraulic system |
Publications (2)
| Publication Number | Publication Date |
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| CN104100583A CN104100583A (en) | 2014-10-15 |
| CN104100583B true CN104100583B (en) | 2016-08-24 |
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| CN201410316094.3A Expired - Fee Related CN104100583B (en) | 2014-07-04 | 2014-07-04 | A kind of dumper Combined hydraulic system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107813748A (en) * | 2017-11-10 | 2018-03-20 | 济南泉工机械有限公司 | A kind of small space dump truck dedicated |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN2675463Y (en) * | 2003-12-16 | 2005-02-02 | 彭德军 | Pneumatic hydraulic controller |
| CN2795516Y (en) * | 2005-04-20 | 2006-07-12 | 相锡洲 | Multifunction air control slow landing valve |
| CN200993131Y (en) * | 2006-12-11 | 2007-12-19 | 中国国际海运集装箱(集团)股份有限公司 | Hydraulic control system for dump truck |
| DE102011100632A1 (en) * | 2011-04-04 | 2012-10-04 | Ak Regeltechnik Gmbh | Piston-cylinder unit for drive system of telescopic boom, has cylinder and piston movable in cylinder, where piston divides interior of cylinder in cylinder spaces |
| CN203189374U (en) * | 2013-04-01 | 2013-09-11 | 重庆航宇实业有限公司 | Engineering vehicle hydraulic pump valve integrated system |
| CN204082717U (en) * | 2014-07-04 | 2015-01-07 | 宁波雪隆王液压科技有限公司 | A kind of dumping car Combined hydraulic system |
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