CN100439166C - Overthrow lifting and automatic control system for dump truck - Google Patents

Overthrow lifting and automatic control system for dump truck Download PDF

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Publication number
CN100439166C
CN100439166C CNB2004100839041A CN200410083904A CN100439166C CN 100439166 C CN100439166 C CN 100439166C CN B2004100839041 A CNB2004100839041 A CN B2004100839041A CN 200410083904 A CN200410083904 A CN 200410083904A CN 100439166 C CN100439166 C CN 100439166C
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China
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piston
lifting
oil
railway carriage
cylinder
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CN1772538A (en
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张玉玺
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Individual
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Abstract

The present invention relates to a lifting and automatic control system for an anti-tipping dump truck. The present invention comprises a lifting carriage, a multisection piston type hydraulic cylinder, a hydraulic oil pump and anti-tipping adjustable supporting legs, the end of the end section and the lower end of the first section of the multisection piston type hydraulic cylinder are respectively fixedly connected with an axis of the earth; the anti-tipping adjustable supporting legs are slantwise arranged on a rear cross beam of the lifting carriage; the combination of the wide axis of the earth and the anti-tipping adjustable supporting legs has reliable anti-tipping function; the multisection piston type hydraulic cylinder adopts a piston ring without end port as a sealing element to ensure the identical performance in a severe cold region and a heat region; a one-way hydraulic pump with small shaft power, a three-position changing flow rate controlling valve and the piston ring without end ports as the sealing element ensure that the performance can not be reduced because of wear; an operator can safely modify the lifting and the falling of the present invention including a loaded car at any time; a five-working-pisition operating valve can meet any operational requirement; a truck door of the present invention can be locked automatically without the operation of people, the truck door is automatically opened and closed, and a discharging passage is opened automatically, and the operation of a dump truck is safe and reliable.

Description

Anti-tipping dumping car lifting and autonomous cruise speed system
Technical field
The present invention relates to a kind of dumping car elevate a turnable ladder and autonomous cruise speed system, a kind of anti-tipping dumping car lifting and autonomous cruise speed system are provided especially.
Background technology
At present, known various dumping car hoisting system has only the lifting function, does not have anti-tipping ability, causes dumping car accidentally or have between two-wheeled that on one side geology is soft in use, just cause roll-over accident, indivedual dumping cars overturn tens of times more than all one's life in the lifting operation unexpectedly.
Existing belly artificial lifting way is not considered anti-tippingly because of its original design, and hoisting system constitutes the transverse variable quadrilateral structure, as easy as rolling off a log tumbling, and carrying surface is too high, and the riding stability extreme difference is so superseded substantially in the whole world.
Employed hydraulic actuating cylinder all is the more piece telescoping structure in the existing preceding artificial lifting way hoisting system, each sealing member that saves sleeve all is located at the nozzle end place of sleeve, and all be the plastic cement sealing member, this hermetically-sealed construction very easily is subjected to the influence of amblent air temperature, winter, sealing member in severe cold became crisp firmly, too soft or the desaturation that at high temperature becomes again summer, because of the defective of self-characteristic, existing hydraulic actuating cylinder fault rate is too high.In addition, the hydraulic actuating cylinder of existing preceding hoisting system is bearing on the vehicle platform by being fixed on very short jointed shaft or the universal bearing, and the wigwag motion phenomenon appears in hydraulic actuating cylinder supporting railway carriage easily that be provided with like this, and is easily crooked, easily tumbles.So the lifting type hoisting system does not have anti-tipping ability equally before existing, the frequency of tumbling is also than higher.
Employed Hydraulic Pump has only three kinds of gear type pumps, ram type pump, vane type oil pump in the existing vehicle lifting system, their common defectives are that shp is big, heat dispersion is poor, after using certain hour, let out in producing because of wearing and tearing, performance reduces, and power consumption is risen, and needs often more to renew parts until cisco unity malfunction; Control cock has only turnover oil commutation simple function.
Operating valve in the existing hoisting system has only oil-feed (lifting), does not work (in stop), three control positioies of draining (decline), vehicle must once be finished in the unloading operation process, particularly loaded vehicle can not be adjusted correction, more increased the frequency of tumbling, property and life security that serious danger is being coerced the dumping car user.In addition, can not satisfy the needs of new model exploitation.
The Door Lock keying of wagon backdoor is manual substantially in the existing hoisting system, even have automatically, the reliability extreme difference, if car door is double-deck back door up and down, its at the middle and upper levels the door all be to shut plate, have a strong impact on discharge channel, tail gate and ground required separation distance are too big during unloading operation, and use is absolutely unsafe reliable.
In sum, present various dumping car all can not satisfy actual use and safety requirements in the whole world, property and life security that serious danger is being coerced the dumping car user, in the technical field of engineering dump truck, press for invention a kind of not only safety but also trouble free, also can be competent at severe cold with hot, at any time, dumping car that can both safe and reliable use in any regional environment.
Summary of the invention
The objective of the invention is to dig many defectives of abandoning existing dumping car, a kind of combination set is provided, satisfy safe and reliable in dumping car lifting operation process, do not tumble, can both normal operation under various severe cold and hot climate condition, accomplish lifelong failure-free anti-tipping dumping car lifting and autonomous cruise speed system substantially.
Further purpose of the present invention be to provide a kind of railway carriage tail gate in the lifting process reliably self-opening, can coupler lock in the falling process, can further improve the anti-tipping dumping car lifting and the autonomous cruise speed system of safe reliability.
When being a kind of vehicle tail gate is provided for double-deck tail gate, further object of the present invention in the body lifting process, can provide maximum discharge channel, safe and reliable anti-tipping dumping car lifting and autonomous cruise speed system.
The object of the present invention is achieved like this:
Anti-tipping dumping car lifting provided by the invention and autonomous cruise speed system include the lifting railway carriage that is located on the vehicle two class chassis, wide earth's axis more piece piston-type hydraulic cylinder and hydraulic oil pump and reversed flow control valve and operating valve,
The front end of described lifting railway carriage is provided with connecting device, the bottom of overcoat of described wide earth's axis more piece piston-type hydraulic cylinder is articulated and connected, the lower end of described more piece piston-type hydraulic cylinder overcoat connects firmly a loose earth's axis, the two ends of this wide earth's axis and described vehicle subframe front end or chassis frame are hinged, become an angle of 90 degrees with hydraulic actuating cylinder, the rear portion of described railway carriage connects the railway carriage trip shaft, and this trip shaft and vehicle are articulated and connected;
Described wide earth's axis more piece piston-type hydraulic cylinder lower end has oil inlet and outlet to be connected with pipe with described reversed flow control valve, when oil inlet and outlet has from the high pressure oil of reversed flow control valve, hydraulic oil enters cylinder lower, it is up to promote piston and piston rod, when the first segment hydraulic actuating cylinder shift onto end of run mouthful effect under push away when motionless, push away later some joint pistons and piston rod again with identical reason; Described more piece piston-type hydraulic cylinder inner structure is a piston type, each saves is close to the plural opening piston ring (being preferably the metallic piston ring) of packing into side by side and constitutes hermetically-sealed construction with hydraulic actuating cylinder in the piston-ring slot that the piston in the hydraulic actuating cylinder is provided with, the setting that interlaces of the peristome of each described opening piston ring, each piston ring seals collar extension mutually, making does not have the gap-clearance of piston rings of perforation on the axis direction of piston, reaching does not axially have leak port; Described hydraulic actuating cylinder lower end has the shared disposable oil inlet and outlet of turnover oil to be connected with pipe with described reversed flow control valve; Described hydraulic oil pump is provided with oil inlet, with the fuel tank plumbing connection; Described Hydraulic Pump oil outlet connects the oil inlet of reversed flow control valve.
Anti-tipping dumping car lifting provided by the invention and autonomous cruise speed system are by being hingedly fixed in the more piece piston-type hydraulic cylinder on the two class chassis frames with the wide earth's axis, compare with the flat-bed connection structure with railway carriage of the prior art, the hydraulic actuating cylinder jointed shaft moves on to the earth's axis two ends of widening by the both sides of hydraulic actuating cylinder, directly be connected with subframe or chassis frame, hydraulic actuating cylinder and the wide earth's axis constitute can not swing, the fixed sturcture of axial rotation only, can eliminate the wiggly phenomenon of hydraulic actuating cylinder substantially.If do the wide earth's axis longer, its stability will be stronger, so best is, and that the two ends of the described earth's axis are extended to the vehicle frame of vehicle is wide, its termination is hinged on the vehicle frame.
In addition, in described more piece piston-type hydraulic cylinder, be close to two the above metallic elastic piston rings of packing in the piston-ring slot, see that on the whole can form a no leak metal seal is the portless piston ring, in use become big, change into the purpose that expansion characteristics reaches automatic compensation gap naturally with the elasticity of metallic piston ring because of wearing and tearing make the gap of piston and cylinder body; Thus, can guarantee respectively to save in the more piece piston-type hydraulic cylinder cylinder barrel to neutral and stable, simultaneously, the metallic piston ring can performance not change normal operation in severe winter or heat.
Therefore, this anti-tipping dumping car lifting and autonomous cruise speed system in dumping car lifting operation process, can accomplish safe and reliable, do not tumble, can both normal operation under various severe cold and hot climate condition.
In order to prevent that further dumping car from working as road surface, car both sides soft or hard difference and causing and tumble, can be provided with anti-tipping adjustable support leg, described anti-tipping adjustable support leg comprises decides supporting leg, moving supporting leg, supporting leg adjuster and latch; Describedly decide supporting leg upper end and assemble tilting the connection with described railway carriage after cross member, its lower end and described moving supporting leg are articulated and connected with axle, moving supporting leg can be made axial rotation, make it to form two states of folding state and expansion and ground supporting, when this moving supporting leg is in folding state and during with the ground supporting state, described latch makes described moving supporting leg fixing under this state.
In the lifting operation, described anti-tipping adjustable support leg is launched, form and ground-surface supporting in the both sides, rear portion of railway carriage, can further prevent because ground, vehicle both sides, parking area soft or hard inequality causes the problem of slide-out.
Described hydraulic oil pump is the unidirectional type Hydraulic Pump preferably, it comprises the cylinder barrel of the pump housing and the pump housing, piston in the cylinder body and with the reciprocating eccentric wheel of automotive power bonded assembly driven plunger, establish oil inlet and outlet respectively at described pump housing aft end face, be connected with described reversed flow control valve, the oil inlet of described reversed flow control valve and fuel tank plumbing connection, be close to the plural opening piston ring (being preferably the metallic piston ring) of packing into side by side in the piston-ring slot that piston in the cylinder is provided with and constitute hermetically-sealed construction with hydraulic actuating cylinder, the setting that interlaces of the peristome of each described opening piston ring, each piston ring seals collar extension mutually, making does not have the gap-clearance of piston rings of perforation on the axis direction of piston, reaching does not axially have leak port;
Common pressure chamber and top variable chamber two parts in the middle of piston in the described cylinder body is divided into cylinder barrel hermetically, between described piston and described top variable chamber end wall, be provided with reseting spring device and the fuel-displaced valve port of one-level, common pressure chamber is provided with oil inlet in the middle of described, dynamical axis in the described power system is plugged in the middle common pressure chamber of described cylinder barrel hermetically, described eccentric wheel and this dynamical axis are made as one, but this eccentric wheel rotates the described piston inspiration of a week roof pressure and compresses once with dynamical axis, and described retracing spring compression can make middle common pressure chamber volume become big and top variable chamber volume diminishes and described piston is resetted under the effect of described retracing spring; Described piston is provided with in line check valve, and described middle common pressure chamber and chamber, variable top are communicated with, and is provided with the one-level check valve on this fuel feed hole, is provided with the one-level of closing this one-level check valve between the top of valve and the piston and closes spring; Top, chamber, described variable top on piston is provided with the secondary check valve, is provided with the secondary of closing this secondary check valve and closes spring between the top of this secondary check valve and cylinder barrel.
The principle of work of this unidirectional type Hydraulic Pump is: hydraulic oil is in described reversed flow control valve oil inlet enters the described middle common pressure chamber of the described cylinder barrel of one-way pump, eccentric wheel makes piston crank motion in the described cylinder barrel of the described pump housing, when under the effect of described piston at described retracing spring when descending, described secondary check valve is not because of there being pressure SELF CL oil outlet under the effect of spring, it is big that chamber, described variable top becomes, the vacuum power that is produced is opened described one-level check valve automatically, hydraulic oil sucks in the chamber, described variable top from described middle common pressure chamber, the eccentric driving of power outside piston is being subjected to, make piston stroking upward, chamber, described variable top diminishes, hydraulic oil flow in the chamber is to described secondary check valve, with this secondary one-way valve opens, high pressure oil enters oil discharge passage, enter the reversed flow control valve again, be connected with the more piece piston-type hydraulic cylinder with pipe, high pressure oil is sent into hydraulic actuating cylinder bottom oil pocket, promote piston stroking upward; Described eccentric wheel is ceaselessly rotation under the drive of vehicular propulsion, and hydraulic oil also continues to flow to hydraulic actuating cylinder.
The structure of the piston ring on the described piston in the described unidirectional Hydraulic Pump preferably with described hydraulic actuating cylinder in the same on the piston, to guarantee sealing property.
Described unidirectional type Hydraulic Pump and gear type pump of the prior art and blade-type pump compare, its efficient height, and energy consumption is low, and compares with plunger pump, and because of having increased elastic sealing ring because of wearing and tearing reduce performance, mechanical efficiency has also improved simultaneously.Cooperate with the more piece piston-type hydraulic cylinder, more increased the safety and the stability of this hoisting system.
Described reversed flow control valve on the described Hydraulic Pump is different from prior art and has only two structure, be three reversing control valves, these three reversed flow control valves have existing two working position oil supply working positions and oil return working position, also have the 3rd working position simultaneously, and working position promptly dams; Match with it, described pneumatic operation valve has at least four working positions, often to open be that primary importance is that the source of the gas normal open and the second place are that oil-feed (custom claim lifting) working position and the 4th is complete oil return (custom claims to descend) two normally closed working positions in position totally three working positions except existing one, between second station and the 4th station, be provided with the 3rd position in addition, be newly-increased restriction oil return flow position, it is normally closed working position, connect a gas current-carrying working position, in the transposition flow-controlling gate of described Hydraulic Pump, be provided with a gas port, make the compressed gas that enters from this gas port make this control cock be on the position between oil supply and two working positions of oil return, promptly be in current floe condition, under this state, the oily decrement of part refluxes.
The effect of this station is, when heavily loaded railway carriage during by the oil supply lifting greatly to certain position, at this moment, if railway carriage is fallen after rise a bit, this does not just accomplish at the pneumatic operation valve that prior art provides, fall after rise, just can only make railway carriage fall back to the end, the heavy weight railway carriage just may cause smashing platform and the impaired accident of railway carriage on the oil return process declines back the vehicle platform like this, so, because of existing lifting device can't be handled the loaded vehicle correction, and this pneumatic control valve has increased the 4th station, can make change-over valve be in current floe condition, just can realize the aforesaid operations demand.Therefore, make this hoisting system safer.
Thus, when lifting reaches requirement height, described three reversed flow control valves are under the oil return operation control of the operating valve of at least four working positions, and when entering the straight-through or current limliting oil return program of oil inlet and outlet, hydraulic oil is directly got back to fuel tank through the turnover oil pipe; Described three reversed flow control valves are exactly under the effect of the operating valve of at least four working positions, by the control of operation cylinder, will advance, the oil return relation carries out conversion, on request can dominant discharge when oil return, increase the oil return function of damming.
Described pneumatic operation valve can also be provided with a station again, becomes five station pneumatic operating valves, and can not establish air valve on this station, reserves an idle station, develops new function for this lifting device in the future condition is provided.
When this anti-tipping dumping car lifting and autonomous cruise speed system work, when oil supply, high pressure oil enters described hydraulic actuating cylinder, the lifting railway carriage, body lifting is to requiring height, goods is unsnatched, and the working position of the described operating valve that the operator will be related with described control cock reaches oil return (landing place), normal pressure or negative pressure oil oil sump tank; The oil return of damming, the working position of the described operating valve that the operator will be related with described control cock reaches the oil return position of damming, and the oil return normal pressure or the negative pressure state that are controlled by described three reversed flow control valves are got back to the oil in the hydraulic actuating cylinder in the fuel tank.
When the hydraulic oil of described three reversed flow control valves did not have pressure, the hydraulic oil in the hydraulic actuating cylinder pushed back fuel tank by described oil inlet and outlet through described three reversed flow control valves with hydraulic oil in hydraulic actuating cylinder under the railway carriage action of gravity.
The back of described lifting railway carriage is provided with car door, the upper end of described car door both sides and the sidewall paneling of railway carriage are articulated and connected, be provided with automatic open and close lock between the lower end of the both sides of described car door and the railway carriage, described automatic open and close lock comprises snap close, latch hook, lock shaft seat, propelling rod, lock and bearing pin; Described snap close and described car door seam, the tail boom assembling links behind described lock shaft seat and the described railway carriage, described latch hook is connected with described bearing pin with described lock shaft seat and can does axial rotation, bearing pin hinge-point with respect to described latch hook, the front end of described latch hook can be thrown off with snap close or be detained dead, one end of the rear end of described latch hook and described propelling rod is hinged, the other end of described propelling rod is hinged on described subframe or the chassis crossrail, and described propelling rod is the close higher crustal inclination setting of described car door one side when the dead described snap close of described latch hook button.
Four-bar linkage of the common formation of described car door automatic open and close lock and described aftbody trip shaft, propelling rod is obliquely installed again, this gradient that the automatic open close of car door utilizes propelling rod in the body lifting process variation and change the hinge-point of propelling rod and railway carriage and the hinge-point of latch hook between horizontal throw realize; When railway carriage is axle center when rotating according to trip shaft during in operation, become by inclination in the process of level at propelling rod, its horizontal throw shortens, and utilizes this range difference that latch hook is driven an angle, makes it to open or close, and reaches the purpose of automatic open close car door.
If described car door is double-deck back door up and down, be provided with open-shut linkage mechanism between the both sides at back door, described top and the back, bottom, this open-shut linkage mechanism comprises the back door transmission arm, back door hinge and propelling rod, one end and the railway carriage of described propelling rod are hinged, its other end and back door, top are hinged, set firmly an end of described back door hinge on the back door, top, the other end of back door hinge and bottom car door are hinged, the upper end of both sides, back door, described bottom and the sidewall paneling of the railway carriage structure that is articulated and connected becomes and is provided with described back door transmission arm in the middle of it, one end and the body side wall of this back door transmission arm are hinged, and its other end is fixed on the back door, bottom; Described bottom is installed with above-mentioned automatic open and close lock on the back equally.When the body lifting operation, under the effect of railway carriage hydraulic actuating cylinder from the front end lifting, the bottom tail gate throws off described latch hook and snap close by automatic open and close lock, the hinge-point around described back door transmission arm and railway carriage rotates unlatching under the impact of material in railway carriage, then just drive the back door, top around its hinge-point rotation with described propelling rod by described back door hinge, and described propelling rod also rotates around the hinge-point of itself and railway carriage, thereby when open at the back door, bottom, make back door, top also united opening and upward movement, at this moment whole aftbody discharge channel is all opened.The effect of double-deck back door interlock can reach minimized two purposes of discharge channel maximization, tail gate and ground required separation distance exactly.
Be provided with shaft-cup on the axle bed of described tumbler shaft, it forms the structure of fixing and insurance function by bolt.If car door opening misoperation, hard thing is met on ground, tail gate can not be put in place smoothly and tail gate is held up, at this moment described tumbler shaft can be with the described bolt abruption of fixed shaft cover, shaft-cup is thrown off, tumbler shaft is released from the hinge-point of railway carriage and is broken away from railway carriage and can not damage other any parts, and bolt of rear end plate can play safety effect simultaneously thus.
In use, when dumping car will carry out the lifting operation, see that earlier ground is whether smooth or whether both sides geology soft or hard is consistent, when using supporting leg as needs, earlier the supporting leg latch is transferred to, to move below supporting leg forwards to, latch is inserted in the following fixed orifice, use the supporting leg adjuster with the vehicle leveling then, move operating valve to the oil-feed position, one-way pump begins to export high pressure oil, and the lifting cylinder is raised railway carriage from the front, when lifting 3-5 and spending, the Door Lock of tail gate is opened automatically, and along with the variation of lift height, the goods in the railway carriage slips out from the wing passage of back, push the lower part of tail gate to back, transmission arm upwards rotates, and upwards also forward, all open car rear side discharge channel gradually on tail gate top, entire cargo is unloaded, at this moment vehicle body disappears because of gravity, and vehicle body raises, and supporting leg and ground are left, the vehicle certain distance of going ahead, operating valve is pulled to the oil return position, the oil inlet and outlet commutation of three reversed flow control valves, former oil-feed becomes oil return, oil in the hydraulic actuating cylinder is under the effect of railway carriage gravity, flow back to fuel tank by former pipeline reversing sense, the Door Lock SELF CL, the tail gate transmission arm also sets back, railway carriage falls after rise and puts in place, finishes one-stop operation.
Anti-tipping dumping car lifting provided by the invention and autonomous cruise speed system are used in combination with the wide earth's axis and supporting leg, has the very anti-tipping function of failure-free, piston type multisection hydraulic cylinder is done sealing member with the portless piston ring, and having guaranteed has identical performance in severe cold with the use of hot zone; The unidirectional type Hydraulic Pump that shp is less, portless piston ring wherein is that sealing member has guaranteed not reduce performance because of wearing and tearing, use three reversed flow control valves, operating personal can be revised the safe in operation of the lifting and the falling that comprise loaded vehicle as required at any time; Five working position operating valves can satisfy any action need; Car door automatic lock and tail gate transmission arm need not the people and go operation, and automatic open close car door and whole discharge channel of opening make the operation of dumping car more safe and reliable.
Description of drawings
The present invention is further described below in conjunction with drawings and Examples.
Fig. 1 is the anti-tipping scheme drawing that wide earth's axis hydraulic actuating cylinder of the present invention and anti-tipping supporting leg are formed;
Fig. 2 is installation site and the structural representation of six major parts in dumping car in anti-tipping dumping car lifting of the present invention and the autonomous cruise speed system;
Fig. 3 is the effect scheme drawings of each parts of the present invention in the lifting operation process;
Fig. 4 is a wide earth's axis more piece piston-type hydraulic cylinder basic structure scheme drawing among the present invention;
Fig. 5 is that three opening piston rings of the present invention are combined and constituted the end face master that a whole portless piston ring amplifies and look scheme drawing;
Fig. 6 is analysing and observe and the mounting structure scheme drawing that the portless piston ring amplifies in annular groove among Fig. 5;
Fig. 7 is unidirectional type Hydraulic Pump cutaway view of the present invention and three reversed flow control valve unitized construction scheme drawings;
Fig. 8 is the left TV structure scheme drawing of Fig. 7;
Fig. 9 is the mounting structure scheme drawing of the present invention's five working position operating valves;
Figure 10 be the anti-tipping supporting leg of the present invention when packing up, crossbeam and car wheel structure concern scheme drawing;
Figure 11 is that supporting leg extension mode of operation, crossbeam and the car wheel structure of Figure 10 concerns scheme drawing.
Figure 12 is the closure state unitized construction (use therein is positive pedestal) of automatic door open and close lock of the present invention and the structural representation of another kind of available inclined to one side pedestal;
Figure 13 is that Figure 12 automatic door open and close lock is spent with regard to openable opening structural representation in inclination 4.
Figure 14 is the discharge channel closed condition structural representation of the double-deck tail gate transmission arm of the present invention.
Figure 15 is the discharge channel complete opening status architecture scheme drawing of double-decker couplet on the door swing arm behind Figure 14.
Among the figure 1, the wide earth's axis of hydraulic actuating cylinder, 2, the hydraulic actuating cylinder oil inlet and outlet, 3, the hydraulic actuating cylinder cylinder barrel, 4, the portless piston ring, 5, chassis frame or subframe, 6, one-way pump two joint valve closure states, 7, piston and one-level opening of valves state, 8, the one-way pump camshaft, 9, the one-way pump cylinder barrel, 10, the one-way pump oil road, 11, three reversed flow control valves, 12, the flow admission port that dams, 13, complete oil-feed program admission port, 14, complete oil return program admission port, 15-16, the convertible oil inlet and outlet of control cock, 17, five working position operating valve handles, 18, the operating valve position fixing handle, 19, the operating valve valve body, 20, operating valve distributes wheel, 21, normally closed synthetic air valve, 22, Chang Kaihe becomes air valve, 23, treat developmental work position plug, 24, chassis or cross member of frame, 25, anti-tippingly decide supporting leg, 26, the supporting leg adapter shaft, 27, the supporting leg latch, 28, moving supporting leg, 29, the supporting leg adjuster, 30 signal wheels, 31, the railway carriage trip shaft, 32, the positive pedestal of electronic keyless entry, 33, propelling rod is adjusted screw rod, 34, the propelling rod central siphon, 35, electronic keyless entry lock shaft seat, 36, the electronic keyless entry latch hook, 37, the electronic keyless entry snap close, 38, the optional inclined to one side pedestal of electronic keyless entry, 39, the automatic door lock pin, 40, tail gate transmission arm pedestal, 41, tail gate transmission arm push rod, 42, tail gate top, 43, the tail gate transmission arm, 44, truck board and interlock arm seat weld, 45, tail gate transmission arm screw gate, 45a, cover plate, 46, tail gate interlock arm seat, 47, back car top and the bottom hinge, 48, the tail gate bottom.
The specific embodiment
Substitute original hoisting system with anti-tipping dumping car lifting provided by the invention and autonomous cruise speed system, increase supporting leg, car door automatic open and close lock, double-deck tail gate transmission arm.
As shown in Figure 1, entire arrangement is arranged hydraulic actuating cylinder and anti-tipping supporting leg properly, this figure is the end view of dumping car, there is shown the position of wide earth's axis hydraulic actuating cylinder A, show the relative position that anti-tipping supporting leg D launches (seeing left side supporting leg D2 among the figure) and wheel 30 after (seeing supporting leg D1 in right side among the figure) and the supporting leg D folding simultaneously with respect to railway carriage A1.
As Fig. 2, shown in, by wide earth's axis hydraulic actuating cylinder A, unidirectional type Hydraulic Pump and three reversed flow control valve B, five working position operating valve C, newly-increased anti-tipping supporting leg D, car door automatic open and close lock E, double-deck tail gate interlock swing arm F also forms the embodiment that six base portions constitute anti-tipping dumping car lifting of the present invention and autonomous cruise speed system together with the part of having improved, its wide earth's axis hydraulic actuating cylinder A, unidirectional type Hydraulic Pump and three reversed flow control valve B, five working position operating valve C are arranged in the front portion of relative car load, its anti-tipping supporting leg D, car door automatic open and close lock E, double-deck tail gate interlock swing arm F is arranged in the rear portion of a dumping car, is equipped with railway carriage and just can finishes whole dumping car ideal functionalities.
As shown in Figure 4, in more piece piston type lifting cylinder A, be provided with the wide earth's axis 1 of stablizing railway carriage, be articulated and connected with chassis auxiliary frame or vehicle frame 5, oil inlet and outlet 2 is connected with pipe with control cock oil inlet and outlet 15 (see figure 8)s capable of reversing, high pressure oil is entered in the oil cylinder chamber of hydraulic cylinder 3, because of three piston-ring slots that opening metallic piston ring 401 places on the piston type cylinder barrel 400, form portless piston ring 4 and (see Fig. 4,5,6) will seal fully with the gap of cylinder barrel 3, high pressure oil in leak free hydraulic actuating cylinder 3 oil pockets can only pass in and out in the hydraulic actuating cylinder cavity of resorption, it is up that high pressure oil just must promote piston 400, shift onto when the first segment hydraulic actuating cylinder and to push away under the effect of end of run mouthfuls 402 when motionless, push away later some joint pistons 400 and piston rod again with identical reason; When being lifted to desired height, move operating handle 17 (see figure 9)s of five station manipulation valve C to dominant discharge or oil return program, hydraulic oil does not have pressure simultaneously or negative pressure is discharged from cylinder barrel 3, flows back to fuel tank from the oil inlet and outlet 15-16 (see figure 8) of one-way pump and three reversed flow control valve B;
As Fig. 7, shown in 8, in unidirectional type Hydraulic Pump and three reversed flow control valve B, Hydraulic Pump comprises the pump housing, pump cylinders 9 on the pump housing, piston 7 in the pump cylinders and with the reciprocating eccentric wheel 91 of automotive power bonded assembly driven plunger, the bilateral symmetry of eccentric wheel 91 be provided with two cover pump cylinders 9, in pump cylinders 9, be respectively equipped with piston 7, establish oil inlet and outlet respectively at pump housing aft end face, be connected with three reversed flow control valves 11, the oil inlet of three reversed flow control valves 11 and fuel tank (not shown) plumbing connection, common pressure chamber 9a and top variable chamber 9b two parts in the middle of piston 7 in the pump cylinders 9 is divided into pump cylinders 9 hermetically, between piston 7 and top variable chamber 9b end wall, be provided with reseting spring device 92, middle common pressure chamber 9a is provided with oil inlet, top variable chamber 9b is provided with oil outlet, dynamical axis 8 in the power system is plugged in the middle common pressure chamber of described pump cylinders 9 hermetically, eccentric wheel 91 is installed on this dynamical axis 8, this eccentric wheel 91 with dynamical axis 8 rotate weeks respectively one of them piston 7 compression reseting spring 92 of roof pressure move make in the middle of common pressure chamber 9a volume become big and top variable chamber 9b volume diminishes and piston 7 is resetted under the effect of retracing spring 92; Piston 7 is provided with fuel feed hole 71, and common pressure chamber 9a and top variable chamber 9b are communicated with in the middle of making, and are provided with one-level check valve 72 on this fuel feed hole 71, are provided with the one-level of closing one-level check valve 72 between the catch 73 that sets firmly on the top of valve and the piston 7 and close spring 74; On the top variable chamber 9b oil outlet on the pump cylinders 9, be provided with secondary check valve 6, between the top of secondary check valve 6 and cylinder barrel 9, be provided with the secondary of closing this secondary check valve and close spring 61.
Also be provided with on the piston 7 portless piston ring 41 with piston 7 with piston and one-way pump cylinder barrel 9 inwalls between fully the sealing, under the rotation of one-way pump camshaft 8 drives, piston moves reciprocatingly at one-way pump cylinder barrel 9 inwalls, when the piston 7 one-level check valve 72 on it is descending, secondary check valve 6 is closed, it is big that top variable chamber 9b becomes, the inner vacuum that forms, suck hydraulic oil between gap by piston 7 center fuel feed holes 71 and one-level check valve 72 from the middle common pressure chamber 9a of one-way pump camshaft 8, when having arrived bottom dead point, piston begins when up, piston 7 is closed with one-level check valve 72, the chamber, top diminishes, the high pressure of hydraulic oil is opened secondary check valve 6, high pressure oil is set in the pipeline in the control of pneumatic control valve 11, by one-way pump oil road 10 high pressure oil is flowed to three reversed flow control valves, hydraulic oil from oil inlet and outlet 15 (see figure 8)s be connected the top variable chamber that pipe enters hydraulic cylinder 3 (see figure 4)s; Hydraulic oil in the hydraulic cylinder 3 pushes back fuel tank by oil inlet and outlet through three reversed flow control valves with hydraulic oil in hydraulic actuating cylinder under the railway carriage action of gravity; Finish whole lifting functions that wide earth's axis more piece piston type lifting cylinder A, one-way pump and three reversed flow control valve B and five station manipulation valve C constitute.Be close to the plural opening piston ring (being preferably the metallic piston ring) of packing into side by side in the piston-ring slot that piston 7 in the cylinder is provided with and constitute hermetically-sealed construction with hydraulic actuating cylinder, the setting that interlaces of the peristome of each described opening piston ring, each piston ring seals collar extension mutually, making does not have the gap-clearance of piston rings of perforation on the axis direction of piston, reaching does not axially have leak port;
Shown in Fig. 1,10,11, anti-tipping adjustable support leg D is by deciding supporting leg 25, moving supporting leg 28, supporting leg adjuster, latch 27 compositions; Decide supporting leg 25 upper ends and railway carriage after cross member chassis or 24 tilting connections of assembling of cross member of frame, the lower end has two opening circular holes to connect moving supporting leg 28, apertura lateralis and moving supporting leg 28 usefulness supporting leg adapter shafts 26 are articulated and connected, moving supporting leg 28 can be made axial rotation, make it to form two states of folding (see figure 10) and expansion and ground supporting (seeing Figure 11), when moving supporting leg 28 is in folding state, latch 27 is plugged in decides location in the hole set on the supporting leg 25 251, when moving supporting leg 28 was in the ground supporting state, latch 27 was plugged in location in the lower end inboard aperture 252 of deciding supporting leg.
In anti-tipping adjustable support leg D, when dumping car will carry out the lifting operation, as ground injustice or both sides ground surface hardness when inconsistent, to move supporting leg 28 and forward control position to around the supporting leg adapter shaft, in inboard aperture, insert supporting leg latch 27, then supporting leg adjuster 29 is transferred to correct position, supports dumping car in guaranteeing safe state, to finish the lifting operation.
Shown in Figure 12,13, in car door automatic open and close lock E, snap close 37 and bottom of door 48 (seeing Figure 14) seam, the tail boom assembling links behind lock shaft seat 35 and the railway carriage, latch hook 36 is connected with lock shaft seat 35 usefulness bearing pins 391 and can does and rotate in a circumferential direction, latch hook 36 front ends can be thrown off with snap close 37 or be detained dead, one end of the rear end of latch hook 36 and propelling rod 34 is hinged, the other end of propelling rod 34 is hinged on the railway carriage by lock pedestal 32 usefulness bearing pins 39, the two ends of propelling rod 34 all can rotate, and propelling rod is the close higher crustal inclination setting of car door one side when latch hook button deadlock is buckled.
Propelling rod will have certain gradient when locking is installed, automatic open and close lock utilizes this changes in pitch and changes the propelling rod horizontal length and realize automatic open close, and car door automatic open and close lock and railway carriage rotating shaft be common to constitute a four-bar linkage; When the rear portion of railway carriage rotates with respect to trip shaft 31, propelling rod 34 also will rotate around the hinge-point 32 on it and the railway carriage, because rigidity propelling rod 34 is provided with near the higher crustal inclination of car door one side when latch hook button deadlock is buckled, then rotate distance increase between the hinge-point 39 of the hinged and propelling rod that becomes propelling rod and railway carriage point lock pedestal 32 in the horizontal process by inclination and latch hook at propelling rod, so propelling rod must spur latch hook and rotate around its hinge-point 391, at this moment, the front end of latch hook upwards rotates with snap close and throws off.Vice versa, therefore, when railway carriage rotates for the axle center according to trip shaft 31 during in the lifting operation, at propelling rod 34 in this process, its horizontal throw shortens, and utilizes this range difference that latch hook 36 is driven an angle, 4 degree after lifting, falling preceding 4 degree that put in place realize to be opened or are closed, and reach the purpose of automatic open close car door; Lock pedestal 32 also can be the inclined to one side pedestal 321 shown in the figure, there is shown the view of the both direction of inclined to one side pedestal 321.
Shown in Figure 14,15, in double-deck back door transmission arm F, pivoted arm seat 46 and 44 seam of truck board column, load onto tail gate transmission arm screw gate 45 and cover plate 45a on the semicircle orifice of top, tumbler shaft and tail gate transmission arm 43 that interior dress is cast as one, and can axially rotate, the other end of tail gate transmission arm 43 and 48 seam of tail gate bottom, tail gate top 42 is connected hinge-point with bottom 48 usefulness hinges, 47 seam, tail gate top is connected with propelling rod 41 axle head pedestals, and another axle head of propelling rod is connected with truck board top pedestal 40; When the body lifting operation, railway carriage is by the wide earth's axis more piece piston-type hydraulic cylinder A lifting of front end, whole railway carriage is an intermediate support with railway carriage trip shaft 31, afterbody descends, tail gate bottom 48 is that rotate in the axle center with the tumbler shaft of tail gate transmission arm 43, moves backward in the tail gate bottom, and tail gate top 42 is under the position-limiting action of propelling rod 41, do travelling forward in jack-up, at this moment whole aftbody discharge channel is all opened; If misoperation, ground meet hard thing, tail gate can not be put in place smoothly, tumbler shaft is broken the screw gate 45 of fixed shaft cover, can not damage other any parts, and fixedly screw gate 45 can play safety effect simultaneously; The effect of double-deck back door interlock swing arm F can reach minimized two purposes of discharge channel maximization, tail gate and ground required separation distance exactly.
As shown in Figure 9, be five working position pneumatic operation valves, it is in traditional three station manipulation valves, has increased by two working positions again; Five working position operating valve handles 17 and operating valve position fixing handle 18 are located on the operating valve valve body 19, operating valve distributes wheel 20 to be located at rotationally on the valve body 19, with distribute five working positions that have that wheel 20 contacts, wherein, working position 22 is that Chang Kaihe becomes air valve, three working positions 21 are normally closed synthetic air valves, send respectively on three corresponding interface of pressurized air on the three bit traffic control cock, realize the control of three working positions.Also has a vacant working position 23, for treating developmental work position plug.
As can be seen from Figure 1, the anti-tipping system that is made up of the wide earth's axis and anti-tipping supporting leg can guarantee dumping car operation anywhere, the possibility of all not tumbling.As can be seen, the integral layout of whole dumping car is comparatively reasonable from Fig. 2 and Fig. 3; Each parts degree of automation is higher, and as can be seen from Figure 4, the ground axial extent of hydraulic actuating cylinder is substantially near subframe or vehicle frame; From Fig. 5 and Fig. 6 as can be seen, the portless piston ring is packed in the piston-ring slot with upper piston ring two exactly, reaches radially no leak port, and wearing and tearing can self-conpensating effect; As can be seen from Figure 7, the unidirectional type Hydraulic Pump has used portless piston ring technology equally, under the effect of two-stage check valve, for the world has increased a kind of new Hydraulic Pump; As can be seen from Figure 9, in traditional three station manipulation valves, two working positions have been increased again; Figure 10 and Figure 11 have showed the concrete structure and utilization example of anti-tipping supporting leg; Figure 12 and Figure 13 have showed the closure of car door automatic open and close lock and the concrete structure of opening; Figure 14 and Figure 15 have showed the closure and the mode of operation of opening whole discharge channels of double-deck tail gate transmission arm.
In sum, the present invention has worldwide increased the anti-tipping function that is made up by wide earth's axis more piece piston-type hydraulic cylinder and supporting leg for dumping car, though the portless piston ring structure technology of hydraulic actuating cylinder is simple, but become possibility for exploitation more piece piston-type hydraulic cylinder, the leakage of hydraulic actuating cylinder and the working environment problem of severe winter and hot summer have been solved simultaneously, also solved the wear automatic-compensation problem, but also be applicable to machine maples such as all the dress combustion engines of pistons and Air compressor, the unidirectional type Hydraulic Pump has increased a Hydraulic Pump world blank again, five working position operating valves also provide a multiduty vitals for the exploitation of dumping car, simple anti-tipping supporting leg, not only can be used for dumping car, also for the simple and easy supporting leg of needs various engineering trucks a selectable unit (SU) is provided, electronic keyless entry does not need any power for various dumping cars provide a cover automatic open close car door especially, the complete scheme that is achieved under elemental effect, double-deck back door transmission arm are unprecedentedly can solve the tail gate ground clearance simultaneously and all open two difficult problems of railway carriage discharge channel and need not the utility unit of external force; Full content of the present invention is contriver oneself and creates, and has reached world lead level.

Claims (9)

1, a kind of anti-tipping dumping car lifting and autonomous cruise speed system include the lifting railway carriage that is located on the vehicle two class chassis, wide earth's axis more piece piston-type hydraulic cylinder and hydraulic oil pump and reversed flow control valve and operating valve,
The front end of described lifting railway carriage is provided with connecting device, the bottom of overcoat of described wide earth's axis more piece piston-type hydraulic cylinder is articulated and connected, the lower end of described more piece piston-type hydraulic cylinder overcoat connects firmly a loose earth's axis, the two ends of this wide earth's axis and described vehicle subframe front end or chassis frame are hinged, become an angle of 90 degrees with hydraulic actuating cylinder, the rear portion of described railway carriage connects the railway carriage trip shaft, and this trip shaft and vehicle are articulated and connected;
Described wide earth's axis more piece piston-type hydraulic cylinder lower end has oil inlet and outlet to be connected with pipe with described reversed flow control valve, when oil inlet and outlet has from the high pressure oil of reversed flow control valve, hydraulic oil enters cylinder lower, it is up to promote piston and piston rod, when the first segment hydraulic actuating cylinder shift onto end of run mouthful effect under push away when motionless, push away later some joint pistons and piston rod again; Described more piece piston-type hydraulic cylinder inner structure is a piston type, each saves in the piston-ring slot that the piston in the hydraulic actuating cylinder is provided with is close to the plural opening piston ring of packing into side by side, constitute hermetically-sealed construction with hydraulic actuating cylinder, the setting that interlaces of the peristome of each described opening piston ring, each piston ring seals collar extension mutually, making does not have the gap-clearance of piston rings of perforation on the axis direction of piston, reaching does not axially have leak port; Described hydraulic actuating cylinder lower end has the shared disposable oil inlet and outlet of turnover oil to be connected with pipe with described reversed flow control valve; Described hydraulic oil pump is provided with oil inlet, with the fuel tank plumbing connection; Described Hydraulic Pump oil outlet connects the oil inlet of reversed flow control valve.
2, lifting according to claim 1 and autonomous cruise speed system, it is characterized in that: also comprise anti-tipping adjustable support leg, described anti-tipping adjustable support leg comprises decides supporting leg, moving supporting leg, supporting leg adjuster and latch, describedly decide supporting leg upper end and assemble tilting the connection with described railway carriage after cross member, its lower end and described moving supporting leg are articulated and connected, described moving supporting leg can be made axial rotation, make it to form two states of folding state and expansion and ground supporting, when this moving supporting leg is in folding state and during with the ground supporting state, described latch makes described moving supporting leg fixing under this state.
3, lifting according to claim 1 and 2 and autonomous cruise speed system, it is characterized in that: described hydraulic oil pump is the unidirectional type Hydraulic Pump, it comprises the cylinder barrel of the pump housing and the pump housing, piston in the cylinder body and drive the eccentric wheel of described reciprocating motion of the pistons with the automotive power bonded assembly, establish oil inlet and outlet respectively at described pump housing aft end face, be connected with described reversed flow control valve, the oil inlet of described reversed flow control valve and fuel tank plumbing connection, be close to pack into side by side plural opening piston ring and hydraulic actuating cylinder formation hermetically-sealed construction in the piston-ring slot that piston in the cylinder is provided with, the setting that interlaces of the peristome of each described opening piston ring, each piston ring seals collar extension mutually, making does not have the gap-clearance of piston rings of perforation on the axis direction of piston, reaching does not axially have leak port.
4, lifting according to claim 3 and autonomous cruise speed system, it is characterized in that: common pressure chamber and top variable chamber two parts in the middle of the piston in the described cylinder body is divided into cylinder barrel hermetically, between described piston and described top variable chamber end wall, be provided with reseting spring device and the fuel-displaced valve port of one-level, common pressure chamber is provided with oil inlet in the middle of described, dynamical axis in the described power system is plugged in the middle common pressure chamber of described cylinder barrel hermetically, described eccentric wheel and this dynamical axis are made as one, this eccentric wheel rotates with dynamical axis can be distinguished two described piston inspirations of roof pressure a week and compress once, and the change of common pressure chamber volume greatly and top variable chamber volume diminishes and described piston is resetted under the effect of described retracing spring in the middle of the described retracing spring of this side of one of them Piston Compression of roof pressure moved and makes; Described piston is provided with described piston and is provided with fuel feed hole, and described middle common pressure chamber and top variable chamber are communicated with, and is provided with the one-level check valve on this fuel feed hole, is provided with the one-level of closing this one-level check valve between the top of this valve and the piston and closes spring; Top, chamber, described variable top on piston is provided with the secondary check valve, is provided with the secondary of closing this secondary check valve and closes spring between the top of this secondary check valve and cylinder barrel.
5, according to claim 1 or 2 or 3 or 4 described lifting and autonomous cruise speed systems, it is characterized in that: the described reversed flow control valve on the described Hydraulic Pump is three reversing control valves, these three reversed flow control valves have existing two working position oil supply working positions and oil return working position, also have the 3rd working position simultaneously, working position promptly dams; Match with it, described pneumatic operation valve has at least four working positions, often to open working position be that primary importance is that source of the gas normal open working position and two normally closed working positions are that the second place is that oil-feed working position and the 4th position are that complete oil return position working position is totally three working positions except existing one, between second station and the 4th station, be provided with the 3rd position in addition, be newly-increased restriction oil return flow position, it is normally closed working position, connect a gas current-carrying working position, in the transposition flow-controlling gate of described Hydraulic Pump, be provided with a gas port, make the compressed gas that enters from this gas port make this control cock be on the position between oil supply and two working positions of oil return, promptly be in current floe condition, under this state, the oily decrement of part refluxes.
6, lifting according to claim 5 and autonomous cruise speed system is characterized in that: described pneumatic operation valve also is provided with a station again, becomes five station pneumatic operating valves, and does not establish air valve on this station, reserves an idle station.
7, according to claim 1 or 2 or 3 or 4 or 5 or 6 described lifting and autonomous cruise speed systems, it is characterized in that: the back of described lifting railway carriage is provided with car door, the upper end of described car door both sides and the sidewall paneling of railway carriage are articulated and connected, be provided with automatic open and close lock between the lower end of the both sides of described car door and the railway carriage, described automatic open and close lock comprises snap close, latch hook, lock shaft seat, propelling rod, lock and bearing pin; Described snap close and described car door seam, the tail boom assembling links behind described lock shaft seat and the described railway carriage, described latch hook is connected with described bearing pin with described lock shaft seat makes it can do axial rotation, bearing pin hinge-point with respect to described latch hook, the front end of described latch hook can be thrown off with snap close or be detained dead, one end of the rear end of described latch hook and described propelling rod is hinged, the other end of described propelling rod is hinged on described subframe or the chassis crossrail, and described propelling rod is the close higher crustal inclination setting of described car door one side when the dead described snap close of described latch hook button.
8, according to claim 1 or 2 or 3 or 4 or 5 or 6 described lifting and autonomous cruise speed systems, it is characterized in that: the back of described lifting railway carriage is provided with car door, described car door is made up of back door, top and back door, bottom, be provided with automatic open and close lock between the lower end of the both sides at back door, described bottom and the railway carriage, described automatic open and close lock comprises snap close, latch hook, lock shaft seat, propelling rod, lock and bearing pin; Described snap close and described car door seam, the tail boom assembling links behind described lock shaft seat and the described railway carriage, described latch hook is connected with described bearing pin with described lock shaft seat and can does axial rotation, bearing pin hinge-point with respect to described latch hook, the front end of described latch hook can be thrown off with snap close or be detained dead, one end of the rear end of described latch hook and described propelling rod is hinged, the other end of described propelling rod is hinged on the described railway carriage, and described propelling rod is the close higher crustal inclination setting of back door, described bottom one side when the dead described snap close of described latch hook button; Be provided with open-shut linkage mechanism between the both sides at back door, described top and the back, described bottom, this open-shut linkage mechanism comprises the back door transmission arm, back door hinge and propelling rod, one end and the railway carriage of described propelling rod are hinged, its other end and back door, top are hinged, set firmly an end of described back door hinge on the back door, top, the other end of back door hinge and bottom car door are hinged, the upper end of both sides, back door, described bottom and the sidewall paneling of the railway carriage structure that is articulated and connected is: be provided with described back door transmission arm in the middle of it, one end and the body side wall of this back door transmission arm are hinged, and its other end is fixed on the back door, bottom.
9, lifting according to claim 8 and autonomous cruise speed system is characterized in that: be provided with shaft-cup on the axle bed of described tumbler shaft, it forms the structure of fixing and insurance function by bolt.
CNB2004100839041A 2004-10-12 2004-10-12 Overthrow lifting and automatic control system for dump truck Expired - Fee Related CN100439166C (en)

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Publication number Priority date Publication date Assignee Title
CN107161067A (en) * 2017-05-26 2017-09-15 湖北聚力汽车技术股份有限公司 A kind of tipping bucket assembly of vacuum sweeper
CN111845513B (en) * 2020-08-03 2022-03-18 龙岩骏行机械制造有限公司 Anti-tipping dumper with dust-raising prevention function
CN114802393B (en) * 2022-05-20 2022-09-06 南通瑞童塑业科技有限公司 Possesses conveyer for hardware products production that dumps heavy load function

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GB1269462A (en) * 1970-02-23 1972-04-06 Neville Ind Mansfield Ltd Safety means for tipping vehicles
CN2128214Y (en) * 1992-04-07 1993-03-17 周家正 Multifunctional automatic loading and unloading truck
US5269592A (en) * 1991-09-13 1993-12-14 Diesel Equipment Limited Hydraulic rams
JPH1035435A (en) * 1996-07-22 1998-02-10 Maeda Seisakusho:Kk High lift workbench
CN1228514A (en) * 1998-03-05 1999-09-15 广东省高技术研究发展中心 Sealed cylinder
CN1275500A (en) * 2000-07-11 2000-12-06 张玉玺 Tipper with combined auxiliary frame and longitudinal beam, single cylinder lifting and support
CN2613402Y (en) * 2003-04-09 2004-04-28 李忠强 Pneumatic switch device for rear box board of dump truck
CN1520361A (en) * 2001-06-19 2004-08-11 迪尔公司 Stand for removable cargo box and method for removing box from vehicle

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1269462A (en) * 1970-02-23 1972-04-06 Neville Ind Mansfield Ltd Safety means for tipping vehicles
US5269592A (en) * 1991-09-13 1993-12-14 Diesel Equipment Limited Hydraulic rams
CN2128214Y (en) * 1992-04-07 1993-03-17 周家正 Multifunctional automatic loading and unloading truck
JPH1035435A (en) * 1996-07-22 1998-02-10 Maeda Seisakusho:Kk High lift workbench
CN1228514A (en) * 1998-03-05 1999-09-15 广东省高技术研究发展中心 Sealed cylinder
CN1275500A (en) * 2000-07-11 2000-12-06 张玉玺 Tipper with combined auxiliary frame and longitudinal beam, single cylinder lifting and support
CN1520361A (en) * 2001-06-19 2004-08-11 迪尔公司 Stand for removable cargo box and method for removing box from vehicle
CN2613402Y (en) * 2003-04-09 2004-04-28 李忠强 Pneumatic switch device for rear box board of dump truck

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