CN204082717U - A kind of dumping car Combined hydraulic system - Google Patents
A kind of dumping car Combined hydraulic system Download PDFInfo
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- CN204082717U CN204082717U CN201420367705.2U CN201420367705U CN204082717U CN 204082717 U CN204082717 U CN 204082717U CN 201420367705 U CN201420367705 U CN 201420367705U CN 204082717 U CN204082717 U CN 204082717U
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Abstract
The utility model relates to a kind of dumping car Combined hydraulic system, comprise fuel tank, pump, oil cylinder combination and power take-off, described power take-off and pump are connected and fixed, described oil cylinder combination comprises multi-stage expansion cylinder, described multi-stage expansion cylinder is connected with a piston assembly, multi-stage expansion cylinder and piston assembly are arranged on the both sides of piston bore inside, and contact with each other; Piston assembly comprises an extension member and a piston, and extension member is arranged in the cavity of described multi-stage expansion cylinder, and piston is fixed on described extension member, and described piston and piston bore are fitted; Extension member fixes with the end cap being arranged on piston bore end.In the utility model dumping car Combined hydraulic system, 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 dumping car Combined hydraulic system pressure, extend the hydraulic system life-span.
Description
Technical field
The utility model relates to dumping car field, particularly relates to a kind of dumping car Combined hydraulic system with telescopic cylinder.
Background technique
Dumping car Combined hydraulic system of the prior art generally all comprises fuel tank, pump and oil hydraulic cylinder, and fuel tank and pump provide power to oil hydraulic cylinder, than just controlling the additional act of dumping car.In dumping car field, general employing multi-stage expansion oil cylinder, arranges multistage flexible cylinder barrel in cylinder shell, operationally, shell and end cap are only played a supporting role, and the multi-stage expansion cylinder barrel of enclosure is under the effect of hydraulic oil, and the size according to telescopic oil cylinder section area is successively stretched out.
As, Chinese patent " horizontal oil cylinder with guide slot ", publication number: 201843854U, publication date, 2011-05-25, discloses a kind of horizontal oil cylinder with guide slot, is built-in with cylinder barrel II at cylinder barrel I, one end of cylinder barrel II is welded with piston I, between the other end and the inwall of cylinder barrel I of cylinder barrel II, be provided with guide sleeve I; Be built-in with piston rod at cylinder barrel II, one end of piston rod is welded with piston I I, between the other end and the inwall of cylinder barrel II of piston rod, be provided with guide sleeve II.
In the oil cylinder recorded in above-mentioned patent, cylinder barrel shell is only played a supporting role, and the cross-sectional diameter of cylinder barrel shell own is larger, the weight of shell own is very heavy, and this kind of design causes the weight of oil cylinder itself comparatively large, because cylinder barrel shell itself can not extend, the build of oil cylinder is larger, for whole dumping car Combined hydraulic system, work system starting pressure is higher, and the stability of a system is poor.
In view of above-mentioned defect, the utility model creator obtains this creation finally through long research and practice.
Summary of the invention
The purpose of this utility model is to provide a kind of dumping car Combined hydraulic system, in order to overcome above-mentioned technological deficiency.
For achieving the above object, the utility model provides a kind of dumping car Combined hydraulic system, comprise fuel tank, pump, oil cylinder combination and power take-off, between above-mentioned fuel tank and pump, be connected with low pressure fuel pipe, between pump and oil cylinder combination, be connected with oil outlet tube, above-mentioned power take-off and pump are connected and fixed, above-mentioned oil cylinder combination comprises multi-stage expansion cylinder, above-mentioned multi-stage expansion cylinder is connected with a piston assembly, and above-mentioned multi-stage expansion cylinder and piston assembly are arranged on the both sides of piston bore inside, and contact with each other;
Above-mentioned piston assembly comprises an extension member and a piston, and above-mentioned extension member is arranged in the cavity of above-mentioned multi-stage expansion cylinder, and above-mentioned piston is fixed on above-mentioned extension member, and above-mentioned piston and piston bore are fitted; Above-mentioned extension member fixes with the end cap being arranged on piston bore end.
Further, above-mentioned extension 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 major part is arranged in cavity;
First oilhole and the second oilhole are set respectively at the sidepiece at above-mentioned locking stroke lever two ends, flow in the hollow cavity of above-mentioned locking stroke lever in order to make oil circuit control.
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 maximum position, 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 telescopic cylinder is slightly less than the diameter of piston, the end of telescopic cylinder of inner side and the ends contact of piston, above-mentioned piston rod, piston, most lateral expansion cylinder and locking stroke lever form airtight cavity jointly, extend in order to driven plunger and locking stroke lever.
Further, the external stability of above-mentioned piston bore is on bearing, arrange a limited part in the end that above-mentioned piston bore and bearing fix, the internal diameter of above-mentioned limited part is less than the internal diameter of piston bore, and forms a positioning step between above-mentioned limited part and piston bore.
Further, said pump and valve form pump valve and combine, and the oil road of pump valve combination is connected with an oil outlet tube; Also arrange a high-pressure oil pipe, its input end connects oil pump outlet line, output terminal connection valve oil inlet pipe; Pump arranges pump turnover oil pipe, and it is connected with low pressure fuel pipe, and valve arranges a valve oil outlet tube, and it is connected with oil outlet tube; Also be provided with return tube at valve inner, the turnover oil pipe of this return tube connecting valve and pump, when valve body oil return, hydraulic oil flows in turnover oil pipe through return tube.
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;
The end cap of above-mentioned piston bore front end arranges a set screw nut, and above-mentioned locking stroke lever and end cap are fixed by above-mentioned set screw nut.
Further, the arranged outside gear edge of above-mentioned piston rod, in order to locate above-mentioned piston; Fixing part is set in piston rod rear end, fixation portions is connected with piston set screw nut, in order to fixing above-mentioned piston; Between fixation portions and gear edge, install piston, the diameter of fixation portions is slightly less than the diameter installing piston place.
The beneficial effects of the utility model are compared with prior art: the multi-stage expansion cylinder and the pump valve composite structure that adopt improvement in the utility model dumping car Combined hydraulic system, 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 dumping car Combined hydraulic system pressure, extend the hydraulic system life-span.
Make full use of the flexible of oil cylinder urceolus in the utility model, reduce the integral diameter of oil cylinder, under the effect of the hydraulic oil of same equal pressure, the pressure promoting cylinder efficient reduces greatly, and oil cylinder extends stable.
Because oil cylinder of the present utility model combines traditional cylinder shell as piston bore, greatly reduce the overall weight of oil cylinder, therefore oil cylinder combination of the present utility model can be applicable in discharging vehicle, can reduce the overall weight of discharging vehicle, greatly reduce steel use amount.Meanwhile, oil cylinder is lighter, saves oil consumption, is convenient to be combined with discharging vehicle.
The utility model arranges positioning part and positioning step on piston cylinder cylinder barrel, can ensure location and the safe operation of oil cylinder further.
At above-mentioned locking stroke lever first oilhole end, locking unit is set, locking unit is when above-mentioned locking stroke lever runs to maximum position, and the first oilhole is closed, and realizes spacing and stops, avoid piston bore rapid elongation to cause the damage of combining oil cylinder, further increase the stability of system.
Accompanying drawing explanation
Fig. 1 is the structural representation of the utility model embodiment one dumping car Combined hydraulic system;
Fig. 2 is the structural representation of the pump valve combination in the utility model embodiment one;
Fig. 3 is the sectional structure schematic diagram of the oil cylinder combination in the utility model;
Fig. 4 be in the utility model oil cylinder combination face structural representation;
Fig. 5 is the sectional structure schematic diagram of the piston assembly in the utility model;
The sectional view at piston bore bearing place when Fig. 6 is the locking stroke lever limit position in the utility model;
Fig. 7 is the sectional structure schematic diagram of the multi-stage expansion cylinder in the utility model;
Fig. 8 is the structural representation of the utility model embodiment two dumping car Combined hydraulic system.
Embodiment
Below in conjunction with accompanying drawing, to above-mentioned being described in more detail with other technical characteristics and advantage of the utility model.
Adopt the combination of fuel tank, pump and oil cylinder in the utility model dumping car Combined hydraulic system, realize lifting and the landing of dumping car.
Refer to shown in Fig. 1, it is the structural representation of the utility model embodiment one dumping car Combined hydraulic system, Combined hydraulic system in the utility model comprises 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 transfers in oil cylinder combination 117 through high-pressure oil pipe 108 by pump valve combined assembly 105, in the utility model, this Combined hydraulic system is arranged on dumping car, oil cylinder combination 117 is combined with the tipping bucket of dumping car, in order to lifting or fall this tipping bucket after rise.In the present embodiment, adopt pump valve combined assembly 105 pairs of low-pressure hydraulic oils to change, also can adopt Normal hydraulic oil pump, and be connected with fuel tank, oil hydraulic cylinder respectively by hydraulic circuit, control valve is set between hydraulic-pressure pump and oil hydraulic cylinder.
In the utility model, fuel tank 101 top arranges oiling intake and exhaust combination 110, in order to refuel and air inlet to fuel tank 101, and exhaust; Set out hydraulic fluid port in fuel tank 101 bottom, this oil outlet is connected with a low pressure fuel pipe 104, a ball valve 102 is set between this low pressure fuel pipe 104 and fuel tank 101, in order to block and to open oil circuit, the low pressure fuel pipe at ball valve 102 place also arranges folder and pounds 103.Above-mentioned low pressure fuel pipe 104 is communicated with fuel tank 101 and pump valve combination 105, and fuel tank 104 passes through this low pressure fuel pipe 104 to pump 106 fuel feeding in pump valve combination 105, and, when oil return, low-pressure hydraulic oil is transmitted oil sump tank 101.
The oil road 108a of pump valve combination 105 is connected with an oil outlet tube 108, high pressure liquid force feed is transferred in 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, be provided with tracheae 113, be connected in order to the control hole combined with pump valve on the valve 109 in 105, realize the control to oil circuit by control valve 109.
In the utility model, this Combined hydraulic system can be used for the lifting process of dumping car, thus, pump valve combination 105 is connected with a power take-off 112 by connecting body 107, the input shaft of power take-off 112 with pump 106 is connected by the mode of spline housing by connecting body 107, and in the present embodiment, power take-off 112 is arranged on outside dumping car gearbox or on clutch, obtain power from certain gear of gearbox or clutch, complete lifting action by power take-off 112 energizes high-pressure oil pump for dumping car.
In the present embodiment, oil cylinder combination 117 arranges connection bracket 116, in order to be connected and fixed with the tipping bucket of dumping car, in the bottom of oil cylinder combination 117, chassis overhang 115 is set, be connected and fixed with the chassis of dumping car, and connection bracket 116 and ground disk holder 115 exist in pairs, be arranged symmetrically with, to ensure the balance of oil cylinder combination 117.
Refer to shown in Fig. 2, it is the structural representation of the pump valve combination in the utility model embodiment two, and in pump valve combination 105 of the present utility model, arrange a high-pressure oil pipe 111, its input end connects oil pump outlet line 111a, output terminal connection valve oil inlet pipe 111b; Pump 106 arranges pump turnover oil pipe 104a, and it is connected with low pressure fuel pipe 104, and valve 109 arranges a valve oil outlet tube 108a, and it is connected with oil outlet tube 108; Also be provided with return tube at valve inner, the turnover oil pipe 104a of this return tube connecting valve and pump, when valve body oil return, hydraulic oil flows in turnover oil pipe 104a through return tube.
Multi-stage expansion cylinder and piston assembly combine by the oil cylinder combination in the utility model, 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.
Refer to shown in Fig. 3, it is the sectional structure schematic diagram of the utility model oil cylinder combination, and in the utility model, oil cylinder combination 117 comprises 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 is cavity 11 in the middle part of multi-stage expansion cylinder 24; Piston assembly comprises an extension member, piston rod 10 and a piston 3, and extension member is arranged in cavity 11, and piston 3 is fixed on extension member; And piston 3 and piston bore 2 are fitted; Extension member fixes with the end cap 7 being arranged on piston bore 2 end; Piston assembly and multi-stage expansion cylinder 24 successively realize the elongation of oil cylinder, under the effect of hydraulic oil, extension member drives piston 3 to extend, and piston 3 promotes piston bore 2 simultaneously and extends, when piston bore 2 is elongated to precalculated position, multi-stage expansion cylinder 24 extends step by step under the promotion of hydraulic oil.
In the utility model, piston 3 is arranged on one end of piston bore 2 inside, at this end, piston 3 leans the inner side at end cap 7, and end cap 7 is fixed on piston bore 2, operationally, active force is applied on end cap 7 by piston 3, and then drives whole piston bore 2 to stretch out.Between piston 3 and piston bore 2, arrange piston packing 8 seal, the two end part contacted with piston bore 2 at piston 3 also arrange 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 slip expansion cylinder of inner side and the ends contact of piston, piston rod 10, piston 3, most inner barrel telescopic cylinder and extension member form airtight cavity 11 jointly, the hydraulic oil entering this cavity 11 produces high pressure, first drives extension member action.
Refer to shown in Fig. 4, it faces structural representation for the combination of the utility model oil cylinder, because oil cylinder of the present utility model combines traditional cylinder shell as piston bore, greatly reduce the overall weight of oil cylinder, therefore oil cylinder combination of the present utility model can be applicable in discharging vehicle, the overall weight of discharging vehicle can be reduced, greatly reduce steel use amount.Meanwhile, oil cylinder is lighter, is convenient to be combined with discharging vehicle.The rear end that oil cylinder combination does not arrange piston 3 is connected with a connecting seat 22, this connecting base 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 also plays motion with one, on the flip component that bearing 21 is connected to vehicle or dip member, as on the tipping bucket of dumping car; Bearing 21 arranges antivibration pad 25.
Piston bore between connecting base 22 and bearing 21 is arranged pouring orifice 29, the hydraulic oil in oil hydraulic circuit is injected oil cylinder.
Refer to shown in Fig. 5, it is the sectional structure schematic diagram of the utility model piston assembly, in the utility model, extension member driven plunger 3 is moved, in the present embodiment, extension member is a locking stroke lever 1, and the middle part of locking stroke lever 1 is hollow cavity, sidepiece at its two ends arranges the first oilhole 14 and the second oilhole 15 respectively, and hydraulic oil flows back and forth in this hollow cavity; In the present embodiment, when oil cylinder combination is in retracted position, the major part of locking stroke lever 1 is arranged in the cavity of multi-stage expansion cylinder 24; When oil cylinder combination is in very big telescopic location, the closed end of the most inner cylinder of locking stroke lever 1, piston rod 10 and telescopic cylinder.
Arrange set screw nut 6 at locking stroke lever 1 with one end that piston 3 is combined, set screw nut 6 is fixed on the outside of end cap 7, and locking stroke lever is fixed on end cap 7 by it, also arranges bonded washer 5 between set screw 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 is fixed successively.
Because the internal diameter of the hollow cavity of the locking stroke lever 1 in the utility model is very little, therefore its pressure promoting piston generation is very large, the damage caused oil cylinder combination is extended for avoiding piston bore 2, at the first oilhole end of locking stroke lever 1, locking unit is set, locking unit, when locking stroke lever 1 and running to maximum position, is combined with the end of piston rod, and the first oilhole 14 is fitted with the madial wall of piston rod 10, first oilhole 14 is closed, and realizes spacing and stops.
In the present embodiment, locking unit is the protruding end 1b being arranged on locking stroke lever 1 end 1a, and at the recess 18 of piston rod 10 front end 10a, protruding end 1b and recess 18 are interlocked, after both contacts, hydraulic oil can be stoped to enter in the intermediate throughholes of piston rod 10.
The setting of this locking unit effectively can realize locking the self-locking of stroke lever and spacing, ensures the stability of oil cylinder combination.
The arranged outside gear edge of piston rod 10, in order to positioning piston 3; Arrange fixing part in piston rod 3 rear end, fixing part is connected with piston set screw nut 33, in order to fixed piston 3, between fixing part and gear edge, install piston 3, the diameter of fixing part is slightly less than the diameter installing piston 3 place.
As the alternative of the present embodiment, the wire rope of connection can be adopted at the oil inlet end of locking stroke lever, or locking stroke lever is replaced by wire rope; Further, lock stroke lever and can be rigid rod or rods.
Refer to shown in Fig. 6, it is the sectional view at piston bore bearing place during the utility model locking stroke lever limit position, and in the present embodiment, locking stroke lever can realize the locking of oil circuit, stops the continuation campaign of piston.
As the another kind of mode realizing location, as shown in Figure 4, the end fixed at piston bore 2 and bearing 21 arranges a limited part 32, and the internal diameter of limited part is less than the internal diameter of piston bore, and forms a positioning step 31 between limited part 32 and piston bore 2; When piston bore 2 moves to limit 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, under the acting in conjunction of hydraulic oil with positioning step 31, piston 3 stop motion, realizes locating simultaneously.In the present embodiment, the height of positioning step and the thickness of limited part 32 can set according to concrete oil cylinder working-pressure.
In the utility model, locking stroke lever 1 can be arranged separately with positioning step 31, and also may be combined setting, its be combined as use together time, positioning step 31 plays the effect of secondary safety protection.
In order to realize locking the self-locking of stroke lever 1, in its cavity or end one spherical locating piece can be set, through a spring it on, under the action of the spring, spherical locating piece with lock stroke lever or piston-rod end contacts and closes.
Refer to shown in Fig. 7, it is the sectional structure schematic diagram of the utility model multi-stage expansion cylinder, 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 outermost slip expansion cylinder and extends, and then drives the motion of inner stages slip expansion cylinder successively.
The working procedure of the utility model dumping car Combined hydraulic system is: when needing dumping car to need lifting tipping bucket, operation controls control valve control power take-off 112 and works, and then power take-off 112 drives pump valve to combine 105 work, pump 106 rotates, low-pressure hydraulic oil is sucked from fuel tank 101 by low pressure fuel pipe 104, and transferring in valve 109 by high-pressure oil pipe 111, high pressure liquid force feed enters oil cylinder combination 117 from oil outlet tube 108 by valve 109; Hydraulic oil injects from pouring orifice 29, enters in cavity 11, and because the intracavity diameter locking stroke lever 1 is very little, hydraulic oil is entered in locking stroke lever 1 by the first oilhole 14, and produces high pressure rapidly, and promotion piston 3 and piston bore 2 extend; When locking the locking unit of stroke lever 1 end and contacting with the second locking unit on piston rod 10, the oil circuit between the first oilhole 14 and cavity 11 blocks, the stop motion of locking stroke lever; High pressure liquid force feed and then promotion outermost slip expansion cylinder extend, then drive inner stages slip expansion cylinder to extend successively, when reaching maximum position, and pouring orifice 29 fuel cut-off.
In external force, under the effect of such as dumping car tipping bucket weight, piston bore is subject to the effect of retracting force, and oil cylinder combination bounces back according to the order contrary with above-mentioned elongation process, finally gets back to original position; Meanwhile, hydraulic oil flows out from the pouring orifice 29 of oil cylinder combination 117, flows back in pump valve combination 105, and then flow back to fuel tank from low pressure fuel pipe 104 again through oil outlet tube 108.
In the utility model, portable valve assembly 114 can the break-make of control valve 109, when valve 109 is in off position, because valve 109 and pump 106 are integrated, hydraulic oil backflow between pump valve combination, keep the idle running of pump 106, without draining in fuel tank 101, in pipeline, hydraulic fluid pressure maintains lower degree.
Make full use of the flexible of oil cylinder urceolus in the utility model, reduce the integral diameter of oil cylinder, under the effect of the hydraulic oil of same equal pressure, the pressure promoting cylinder efficient improves greatly, and oil cylinder extends rapidly.
Embodiment two
Refer to shown in Fig. 8, it is the structural representation of the utility model embodiment two dumping car Combined hydraulic system.With above-described embodiment unlike, the working pressure of pump valve combined assembly is large, pump valve combined assembly arranges two turnover oil pipe 104a, two oil inlet and outlet 101a are set on fuel tank 101 accordingly, low pressure fuel pipe 104 is connected with between turnover oil pipe 104a and oil inlet and outlet 101a, valve 109 arranges a valve oil outlet tube, and it is connected with oil outlet tube 108, provides hydraulic oil to actuator; Accordingly, be also provided with a valve return tube at valve inner, the turnover oil pipe 104a of this return tube connecting valve and pump, when valve body oil return, hydraulic oil flows in turnover oil pipe 104a through valve return tube.
Valve 109 arranges valve oil outlet tube 108a, and it is connected with oil outlet tube 108, and oil outlet tube 108 the other end and oil cylinder combine 117 and be connected.
The foregoing is only preferred embodiment of the present utility model, is only illustrative for model utility, and nonrestrictive.Those skilled in the art is understood, and requires to carry out many changes to it in the spirit and scope that limit, amendment in model utility right, even equivalent, but all will fall in protection domain of the present utility model.
Claims (10)
1. a dumping car Combined hydraulic system, comprise fuel tank (101), pump (109), oil cylinder combination (117) and power take-off (112), low pressure fuel pipe (104) is connected with between described fuel tank (101) and pump (109), oil outlet tube (108) is connected with between pump (109) and oil cylinder combination (117), described power take-off (112) and pump (109) are connected and fixed, it is characterized in that, described oil cylinder combination (117) comprises 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 inner both sides of piston bore (2), and contact with each other,
Described piston assembly comprises an extension member and a piston (3), described extension member is arranged in the cavity (11) of described multi-stage expansion cylinder (24), described piston (3) is fixed on described extension member, and described piston (3) and piston bore (2) are fitted; Described extension member fixes with the end cap (7) being arranged on piston bore (2) end.
2. dumping car Combined hydraulic system according to claim 1, is characterized in that, described extension member is a locking stroke lever (1), and described locking stroke lever (1) middle part is hollow cavity;
At the sidepiece at described locking stroke lever (1) two ends, the first oilhole (14) and the second oilhole (15) are set respectively.
3. dumping car Combined hydraulic system according to claim 2, it is characterized in that, first oilhole end of described locking stroke lever (1) arranges a locking unit, and the end of its piston rod (10) be connected with described piston (3) combines.
4. dumping car Combined hydraulic system according to claim 3, it is characterized in that, 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.
5. the dumping car Combined hydraulic system according to claim 3 or 4, it is characterized in that, 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.
6. dumping car Combined hydraulic system according to claim 5, it is characterized in that, the side of described piston (3) is described multi-stage expansion cylinder (24), the cross-sectional diameter of its outermost telescopic cylinder is slightly less than the cross-sectional diameter of piston (3), the end of telescopic cylinder of inner side and the ends contact of piston (3), described piston rod (10), piston (3), most lateral expansion cylinder and locking stroke lever (1) form airtight cavity jointly, in order to driven plunger (3) and locking stroke lever (1) elongation.
7. dumping car Combined hydraulic system according to claim 6, 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 limited part (32), the internal diameter of described limited part (32) is less than the internal diameter of piston bore (2), and forms a positioning step between described limited part (32) and piston bore (2).
8. dumping car Combined hydraulic system according to claim 7, it is characterized in that, described pump (106) and valve (109) form pump valve and combine (105), and the oil road (108a) of pump valve combination (105) is connected with an oil outlet tube (108); Also arrange a high-pressure oil pipe (111), its input end connects oil pump outlet line (111a), output terminal connection valve oil inlet pipe (111b); Pump (106) arranges pump turnover oil pipe (104a), it is connected with low pressure fuel pipe (104), valve (109) arranges a valve oil outlet tube (108a), and it is connected with oil outlet tube (108); Also return tube is provided with, the turnover oil pipe (104a) of this return tube connecting valve and pump at valve inner.
9. dumping car Combined hydraulic system according to claim 7, is characterized in that, described bearing (21) is fixed on vehicle component; The rear end of described piston bore (2) is also connected with a connecting seat (22); The end cap (7) of described piston bore (2) front end arranges a set screw nut (6), and described locking stroke lever (1) is fixedly connected with through described set screw nut (6) with end cap (7).
10. dumping car Combined hydraulic system according to claim 8, is characterized in that, the arranged outside gear edge of described piston rod (10), in order to locate described piston (3); Fixing part is set in piston rod (10) rear end, described fixing part is connected with piston set screw nut (33), in order to fixing described piston (3); Between described fixing part and gear edge, install piston (3), the diameter of described fixing part is slightly less than the diameter installing piston (3) place.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420367705.2U CN204082717U (en) | 2014-07-04 | 2014-07-04 | A kind of dumping car Combined hydraulic system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420367705.2U CN204082717U (en) | 2014-07-04 | 2014-07-04 | A kind of dumping car Combined hydraulic system |
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| CN204082717U true CN204082717U (en) | 2015-01-07 |
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| CN201420367705.2U Expired - Fee Related CN204082717U (en) | 2014-07-04 | 2014-07-04 | A kind of dumping car Combined hydraulic system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104100583A (en) * | 2014-07-04 | 2014-10-15 | 宁波雪隆王液压科技有限公司 | Hydraulic combination system for dumper |
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2014
- 2014-07-04 CN CN201420367705.2U patent/CN204082717U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104100583A (en) * | 2014-07-04 | 2014-10-15 | 宁波雪隆王液压科技有限公司 | Hydraulic combination system for dumper |
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