CN202273935U - Lifting control valve assembly for self-dumping automobile - Google Patents
Lifting control valve assembly for self-dumping automobile Download PDFInfo
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- CN202273935U CN202273935U CN2011204162810U CN201120416281U CN202273935U CN 202273935 U CN202273935 U CN 202273935U CN 2011204162810 U CN2011204162810 U CN 2011204162810U CN 201120416281 U CN201120416281 U CN 201120416281U CN 202273935 U CN202273935 U CN 202273935U
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Abstract
The utility model relates to a lifting control valve assembly for a self-dumping automobile. The lifting control valve assembly comprises a control loop consisting of a reversing valve, a check valve, a safety valve and the like and a gear pump, wherein mounting holes which are suitable for installing each component in the control loop and a pipeline for communicating each component in the control loop correspondingly are formed on a rear cover of the gear pump; an oil inlet interface and an oil return interface which are communicated with an oil tank and a pressure oil interface which is connected with an operating cavity of a hydraulic cylinder are formed in the outer end face of the rear cover of the gear pump; and a pump oil absorption channel for communicating the oil inlet interface and an oil absorption cavity of the gear pump, a pump oil discharging channel for communicating an oil discharging cavity of the gear pump and an oil inlet cavity of the reversing valve, a high-pressure casting oil duct for communicating the pressure oil interface and a liquid outlet of the check valve and a system oil return channel for communicating an oil return opening of the reversing valve, an oil outlet of the safety valve and the oil return interface are formed inside the rear cover. The utility model provides the lifting control valve assembly of which the control loop is integrated on the rear cover of the gear pump and which is used for the self-dumping automobile.
Description
Technical field
The utility model relates to the lifting structures of dump truck, specifically, is a kind of hoist control valve assembly of controlling the dump truck lifting.
Background technique
At present, domestic dump truck hydraulic lifting system is the hydraulic pressure component of selecting for use by simple function mostly, as: the hydrovalve of monodentate wheel pump, simple function and oil hydraulic cylinder etc. are formed by connecting through pipeline.And each component that constitutes the dump truck hydraulic lifting system often is installed in the different parts of automobile chassis respectively; Cause the pipeline and the tie point (joint) of connection more; Thereby cause not convenient for installation and adjustmently, the oil ring joint (hidden danger) that leaks that possibly occur is more.Chinese patent document CN2248264Y is to this problem; A kind of lifting distributing valve of dump truck has been proposed; Form by in line check valve, pressure-limit valve, positioning means, guiding valve, valve body, return spring; Wherein in line check valve and pressure-limit valve are installed, guiding valve are installed, positioning means and return spring are installed at the afterbody of guiding valve and valve body at the middle part of valve body in the upper end of valve body.This existing technology is installed on the vehicle hoisting fuel tank, and guiding valve is connected with cylinder, and when stirring the air valve handle, cylinder will drive guiding valve and move, and the trend of control hydraulic oil is moved in the switching-over of guiding valve, thus realize the compartment lifting, in stop, descend, float and move.This existing technology concentrates on the valve of various simple functions on one main valve, has significantly reduced the use of connecting pipeline, makes structure more compact; Having reduced leakage, but in this existing technology, is to separate independently between the gear pump that oil-feed is provided and the main valve; Therefore, in use, also need be connected between gear pump and the main valve through corresponding pipeline; Not only cause not convenient for installation and adjustmently, and whole result is compact inadequately, and there is the leakage of oil link easily in jointing.
Summary of the invention
For this reason; The utility model technical problem to be solved is that gear pump of the prior art and lifting distributing valve are to separate independent the installation, thereby causes in use, also need be connected through corresponding pipeline between gear pump and the lifting distributing valve; Not only cause not convenient for installation and adjustment; And total is compact inadequately, and there is the problem of leakage of oil link easily in jointing, and the hoist control valve assembly of the dump truck that a kind of lifting valve and gear pump become one is provided.
For solving the problems of the technologies described above; The hoist control valve assembly of a kind of dump truck of the utility model; Comprise control loop; Said control loop through the feed flow of control in the oil hydraulic cylinder, return liquid and realize stretching out, withdrawing of piston in hydraulic cylinder bar, it comprises control feed flow or return the selector valve of liquid from oil hydraulic cylinder in the oil hydraulic cylinder; Be arranged on the feed liquor pipeline by feed flow in the said oil hydraulic cylinder of said selector valve place court, prevent the one-way valve that in said oil hydraulic cylinder, refluxes; And the safety valve of setting up said oil hydraulic cylinder pressure maximum; Also comprise a gear pump; Form on the bonnet of said gear pump and be fit to the mounting hole that each parts is installed in the said control loop; And with the oil duct of the corresponding connection of each parts in the said control loop; And form the oil-feed interface and the oil return interface that are communicated with fuel tank on the exterior edge face of the bonnet of said gear pump respectively, and the pressure oil interface that is connected with the active chamber of said oil hydraulic cylinder; The inside of said bonnet forms the pump suction passage that said oil-feed interface is communicated with said gear pump oil sucting cavity; The pump oil drain passage that said gear pump oil-discharging cavity is communicated with the oil suction chamber of said selector valve; The squeeze casting oil duct that said pressure oil interface is communicated with the liquid outlet of said one-way valve; The system oil return passage that the oil outlet of the return opening of said selector valve and said safety valve is communicated with said oil return interface.
Corresponding position on the master of said gear pump, the pairing said bonnet in driven gear bearing hole bottom surface respectively offers tapped aperture; Said aperture one end communicates with the inner draining passage of said gear pump; The other end communicates with said system oil return passage, and also is provided with stifled whelk nail in the pairing said aperture of said driven gear.
Said bonnet comprises the cap portion that cooperates with the pump housing of said gear pump; And the outer mounting portion of the pump housing of stretching out gear pump oil extraction side; Said selector valve and said one-way valve are arranged on the said mounting portion, and said oil return interface and said pressure oil interface are molded on the exterior edge face on the said mounting portion.
The operating end of said selector valve is arranged on the interior edge face place of said bonnet; The valve rod of said selector valve stretches out the exterior edge face of said bonnet; And the external part of said valve rod is provided with and is connected with the lifting angle protection mechanism of dump truck, said valve rod is returned to the valve rod limit stoper of said selector valve meta by the last raise-position of said selector valve.
Said valve rod limit stoper comprises the valve rod stop collar on the said external part that is set in said valve rod; And one be installed in said bonnet exterior edge face; Support the limiting bracket of said valve rod stop collar; Said valve rod stop collar can axially come and go in said limiting bracket and move, and the part that said valve rod stop collar is positioned at outside the said position-limited rack is provided with the suitable attachment portion that is connected with said lifting angle protection mechanism; Said valve rod stop collar is positioned to form on the part of said limiting bracket and prevents that said valve rod stop collar from deviating from first limited step of said limiting bracket; And also form insertion groove on the sidewall of said valve rod stop collar; Said valve rod is provided with horizontal bearing pin; The two ends of said bearing pin are fit to insert in the said insertion groove, and said valve rod stop collar makes said valve rod be back to the meta of said selector valve through the said valve rod of the reverse pulling of said bearing pin.
Said selector valve is manually to control selector valve; When also comprising switching-over, to the positioning means that the valve rod of said manual control selector valve is located, said positioning means comprises the positioning ring groove on the said valve rod cylindrical that is molded over said selector valve; Be stuck in the positioning ball in the said positioning ring groove; Prop up said positioning ball and snap in the spring in the said positioning ring groove, and the fitting seat that said spring is installed, said fitting seat comprises the body that forms tapped hole; And being arranged on the screw plug plug in the tapped hole, the end that said screw plug plug inserts in the said tapped hole forms the inner chamber that is fit to install said spring.
Said selector valve is an air-actuated direction valve, and the pneumatic operation of said air-actuated direction valve partly comprises the piston that is arranged on the valve rod operating end, and is set on the said piston; The cylinder sleeve that cooperates with said piston; The sidewall of said cylinder sleeve axial direction is provided with two import/exhaust holes, and said piston comes and goes between two said import/exhaust holes and moves, and drives said valve rod axial direction and comes and goes mobile; When also comprising switching-over; The position-limit mechanism spacing to the valve rod of said air-actuated direction valve, said position-limit mechanism comprise second limited step that is molded over said inboard wall of cylinder liner, are arranged between said second limited step and the said bonnet exterior edge face; Oppositely be set on the said valve rod; Have two limit spring seats of flange, and be set on the said valve rod, conflict the respectively spring of flange of said two said limit spring seats of two ends.Said system oil return passage is provided with the dividing busing that prevents that said system oil return passage from mixing with said pump suction passage with the intersection of said pump suction passage on said bonnet.
Or said oil return jointing is provided with the screw plug that said oil return interface is stopped up, and said system oil return passage communicates with said pump suction passage.
The technique scheme of the utility model is compared existing technology and is had the following advantages; 1, in the utility model, by selector valve, the control loop of formations such as one-way valve, safety valve is integrated on the bonnet of gear pump; Not only make simple and compact for structure; And significantly reduced the connection of pipeline, thereby reduced the draining link, also make simultaneously the manufacturing of whole lifting valve assembly, install, more convenient with adjustment; 2, in the utility model; The cog master of pump, tapped aperture that driven gear bearing hole bottom surface is offered of gear pump rear cover communicates with the system oil return runner of casting in the bonnet; And in the pairing aperture of follower, be provided with stifled whelk nail; Not only can the oil that release in the gear pump be derived, but also can change the direction that gear pump rotates easily as required; 3, in the utility model; Also be provided with the valve rod limit stoper; When lifting angle, the compartment of dump truck surpasses specified value, valve rod is oppositely retracted " meta " position and location through lifting angle protection mechanism pulling valve rod limit stoper, thus the trouble free service of protection dump truck.
Description of drawings
For the content that makes the utility model is more clearly understood,, the utility model is done further detailed explanation, wherein below according to the specific embodiment of the utility model and combine accompanying drawing
Fig. 1 is the three circuit system schematic representation of the utility model;
Fig. 2 is the secondary coolant circuit system schematic representation of the utility model;
Fig. 3 is that the selector valve of the utility model is the plan view of pneumatic mode;
Fig. 4 is the sectional view of the A-A direction of Fig. 3;
Fig. 5 is that Fig. 3 is the sectional view of the B-B direction of three circuit systems;
Fig. 6 is that Fig. 3 is the sectional view of the B-B direction of secondary coolant circuit system;
Fig. 7 is the sectional view of the C-C direction of Fig. 3;
Fig. 8 is that the selector valve of the utility model is the sectional view of the C-C direction of manual mode.
Reference character is expressed as among the figure: the 1-oil hydraulic cylinder; The 2-piston rod; The 3-one-way valve; The 4-safety valve; The 5-bonnet; 6-oil-feed interface; 7-oil return interface; 8-pressure oil interface; 9-pump suction passage; 10-pump oil drain passage; 11-squeeze casting oil duct; 12-system oil return passage; The 13-aperture; The stifled whelk nail of 14-; The 15-pump housing; 16-valve rod stop collar; The 17-gear pump; 18-manually controls reversing valve complement; The 19-positioning ball; The 20-spring; 21-screw plug plug; The 22-air-actuated direction valve; The 23-dividing busing; The 24-screw plug; The 25-bearing pin; The 26-limiting bracket; The 27-valve rod; The 28-piston; The 29-cylinder sleeve; 30-import/exhaust hole; The 31-lid; 32-selector valve oil-feed tank; The 33-selector valve goes out oil groove; 34-selector valve first oil-return groove; 35-selector valve second oil-return groove; The 36-limit spring; The 37-locking nut.
Embodiment
Extremely shown in Figure 7 like Fig. 1; The hoist control valve assembly of a kind of dump truck of present embodiment; Comprise control loop; Said control loop through the feed flow in the control oil hydraulic cylinder 1, return liquid and realize stretching out, withdraw of oil hydraulic cylinder 1 inner piston rod 2, it comprises that control returns the selector valve of liquid towards oil hydraulic cylinder 1 interior feed flow or from oil hydraulic cylinder 1; Be arranged on by said selector valve place on the feed liquor oil duct of said oil hydraulic cylinder 1 interior feed flow, prevent the one-way valve 3 that in said oil hydraulic cylinder 1, refluxes; And the safety valve 4 of setting up said oil hydraulic cylinder 1 pressure maximum; Also comprise a gear pump 17; Form on the bonnet 5 of said gear pump 17 and be fit to the mounting hole that each parts is installed in the said control loop; And with the oil duct of the corresponding connection of each parts in the said control loop; And form the oil-feed interface 6 and oil return interface 7 that are communicated with fuel tank on the exterior edge face of the bonnet 5 of said gear pump 17 respectively, and the pressure oil interface 8 that is connected with the active chamber of said oil hydraulic cylinder 1; The inside of said bonnet 5 forms the pump suction passage 9 that said oil-feed interface 6 is communicated with said gear pump 17 oil sucting cavities; The pump oil drain passage 10 that said gear pump 17 oil drain outs are communicated with the filler opening of said selector valve; The squeeze casting oil duct 11 that said pressure oil interface 8 is communicated with the liquid outlet of said one-way valve 3; The system oil return passage 12 that the oil outlet of the return opening of said selector valve and said safety valve 4 is communicated with said oil return interface 7.Said control loop is integrated on the bonnet of gear pump, not only makes simple and compact for structurely, and has significantly reduced the connection of pipeline, thereby has reduced the draining link, also make simultaneously the manufacturing of whole lifting valve assembly, install, more convenient with adjustment.
Corresponding position on the master of said gear pump 17, the pairing said bonnet 5 in driven gear bearing hole bottom surface respectively offers tapped aperture 13; Said aperture 13 1 ends communicate with said gear pump 17 inner draining passages; The other end communicates with said system oil return passage 12, and also is provided with stifled oily screw element 14 in the pairing said aperture 13 of said driven gear.Cog master, the driven gear bearing hole bottom surface of pump 17 of bonnet 5 all offers tapped aperture 13 and communicates with the system oil return runner 12 of casting in the bonnet; When needing to change the sense of rotation of gear pump 17; Can be by following procedure operation: clamp protecgulum, unscrew and unload four bolts and the packing ring that connect protecgulum, the pump housing 15 and bonnet, remove down rear cover assembly, with the stifled whelk of bottom surface, passive bearing hole on the bonnet 5 follow closely 14 move to another bearing hole bottom surface tapped aperture 13 places; With the pump housing 15 Rotate 180 ° on the protecgulum position that clamps; Bonnet 5 behind original position Rotate 180 °, is ressembled, loaded onto packing ring then again; Again tighten four bolts by prescribed torque, promptly changed the original rotation direction of gear pump 17.After rotation direction changed, stifled whelk nail 14 was still at tapped aperture 13 places of bottom surface, passive bearing hole.The gear pump internal leakage gets into the system oil return passage of casting in the bonnet 12 through pump internal drainage passage along the band internal thread aperture of this driving gear shaft bearing hole bottom surface in the bonnet.
Said bonnet 5 comprises the cap portion that cooperates with the pump housing 15 of said gear pump 17; And the pump housing 15 mounting portion outward of stretching out gear pump 17 oil extraction sides; Said selector valve and said one-way valve 3 are arranged on the said mounting portion with safety valve 4, and said oil return interface 7 and said pressure oil interface 8 are molded on the exterior edge face on the said mounting portion.
In the present embodiment, said selector valve is an air-actuated direction valve assembly 22, and the pneumatic operation of said air-actuated direction valve assembly partly comprises the piston 28 that is arranged on valve rod 27 operating ends; And be set on the said piston 28, with the cylinder sleeve 29 that said piston 28 cooperates, the sidewall of said cylinder sleeve 29 axial directions is provided with two import/exhaust holes 30; Said piston 28 comes and goes between two said import/exhaust holes 30 and moves; Drive said valve rod 27 axial directions and come and go to move, when also comprising switching-over, the position-limit mechanism spacing to the valve rod of said air-actuated direction valve assembly 22 27; Said position-limit mechanism comprises second limited step that is molded over said cylinder sleeve 29 inwalls; Be arranged between said second limited step and the said bonnet exterior edge face, oppositely be set on the said valve rod 27, have two limit spring seats 31 of flange; And be set on the said valve rod 27 conflict the respectively limit spring 36 and locking nut 37 of flange of said two said limit spring seats 31 of two ends.
The operating end of said selector valve is arranged on the interior edge face place of said bonnet 5; The valve rod 27 of said selector valve stretches out the exterior edge face of said bonnet 5; And the external part of said valve rod 27 is provided with and is connected with the lifting angle protection mechanism of dump truck, said valve rod 27 is returned to the valve rod limit stoper of said selector valve meta by the last raise-position of said selector valve.In the present embodiment; Said valve rod limit stoper comprises the valve rod stop collar 16 on the said output terminal that is set in said valve rod 27; And one be installed in said bonnet exterior edge face; Support the limiting bracket 26 of said valve rod stop collar, said valve rod stop collar 16 can axially come and go in said limiting bracket 26 and move, and the part that said valve rod stop collar is positioned at outside the said position-limited rack is provided with the suitable attachment portion that is connected with said lifting angle protection mechanism; Said valve rod stop collar 16 is positioned to form on the part of said limiting bracket 26 and prevents that said valve rod stop collar 16 from deviating from first limited step of said limiting bracket 26; And also form insertion groove on the sidewall of said valve rod stop collar 16; Said valve rod 27 is provided with horizontal bearing pin 25; The two ends of said bearing pin 25 are fit to insert in the said insertion groove, and said valve rod stop collar 16 makes the meta of 27 times said selector valves of said valve rod through the said valve rod 27 of said bearing pin 25 reverse pullings.
Like Fig. 1 and shown in Figure 5; When said control loop is three circuit systems; Said system oil return passage 12 is provided with the dividing busing 23 that prevents that said system oil return passage 12 from mixing with said pump suction passage 9 with the intersection of said pump suction passage 9 on said bonnet 5, said oil return interface 7 no screw plugs 24.
Like Fig. 2 and shown in Figure 6, in other embodiments, when said control loop was secondary coolant circuit system, said oil return interface 7 places were provided with the screw plug 24 that said oil return interface 7 is stopped up, and said system oil return passage 12 communicates with said pump suction passage 9, no dividing busing 23.
As shown in Figure 8, in the present embodiment, said selector valve is manually to control selector valve 18; When also comprising switching-over, to the positioning means that the valve rod of said manual control selector valve 18 is located, said positioning means comprises the positioning ring groove on the said valve rod cylindrical that is molded over said selector valve; Be stuck in the positioning ball 19 in the said positioning ring groove; Prop up said positioning ball 19 and snap in the spring 20 in the said positioning ring groove, and the fitting seat that said spring 20 is installed, said fitting seat comprises the body that forms tapped hole; And being arranged on the screw plug plug 21 in the tapped hole, the end that said screw plug plug 21 inserts in the said tapped hole forms the inner chamber that is fit to install said spring 20.When dump truck carries out lifting; Surpass specified value like lifting angle, railway carriage or compartment; The lifting angle protection mechanism that then is provided with on the dump truck will be through the bearing pin 25 that is provided with on the 16 pulling valve rods 27 of the valve rod stop collar on the valve rod 27; Valve rod 27 is oppositely retracted " meta " position and has locking ball 19 to snap in location in the locating slot, with the trouble free service of protection dump truck.
Working procedure:
1) selector valve is in meta
The valve rod of selector valve is at " meta "; The corresponding the utility model in this position is not worked or carriage of dump truck (single-action hydraulic cylinder piston) rests on a certain position; Gear pump 17 is through oil inlet pipe oil suction in the fuel tank; Get in the gear pump 17 through oil-feed interface 6, pump suction passage 9; Flow to the selector valve oil-feed tank 32 of selector valve then from the pump oil drain passage 10 of gear pump 17, the II platform of the valve rod of selector valve goes out oil groove 33 with selector valve oil-feed tank 32 and selector valve and cuts off, and valve rod III platform goes out oil groove 33 with selector valve and cuts off with selector valve first oil-return groove 34; Selector valve oil-feed tank 32 is linked up with selector valve second oil-return groove 35, and selector valve second oil-return groove 35 communicates with oil return interface 7 through system oil return passage 12 with selector valve first oil-return groove 34; If three circuit systems then separate with dividing busing 23 in the intersection of system oil return passage 12 with pump suction passage 9, oil return interface 7 is not adorned screw plug 24.The flow direction of the oil extraction of gear pump is: pump oil drain passage 10 → selector valve oil-feed tank 32 → selector valve second oil-return groove 35 → selector valve first oil-return groove 34 → system oil return passage 12 → oil return interface 7 → flow back to fuel tank.Be provided with one-way valve 3 and safe valve member 4 because of bonnet is inherent like aforesaid position in addition; So the oil in the oil hydraulic cylinder is sealed by one-way valve 3; Make the hydraulic system overload when produce impulsive load because of certain reason, when surpassing safety valve 4 set pressures, safety valve 4 can shield to oil hydraulic cylinder and hydraulic system; Selector valve is when meta in addition, and the valve rod 27 of manual manipulation has the localization machine member, and the pneumatic guiding valve of controlling has the centering position-limit mechanism, can prevent the unexpected downslide of carriage of dump truck.If secondary coolant circuit system should remove dividing busing 23, simultaneously oil return interface 7 is blocked with screw plug 24.Then the flow direction of gear pump oil extraction this moment is: pump oil drain passage 10 → selector valve oil-feed tank 32 → selector valve second oil-return groove 35 → selector valve first oil-return groove 34 → system oil return passage 12 → pump oil suction road; The working condition of all the other valves is identical with three circuit systems.
2) selector valve is in raise-position
When the valve rod 27 of selector valve vertically when meta moves right a design distance; The II platform of valve rod cuts off selector valve oil-feed tank 32 and selector valve second oil-return groove 35; Selector valve oil-feed tank 32 and selector valve are gone out oil groove 33 to be cut off; The III platform of valve rod goes out oil groove 33 with selector valve and cuts off with selector valve first oil-return groove 34; This moment, the flow direction of oil extraction of gear pump was: pump oil drain passage 10 → selector valve oil-feed tank 32 → back down one-way valve 4 → selector valve goes out oil groove 33 → through unidirectional valve pocket side window mouth and nonreturn valve core radial hole → through the cavity of resorption of squeeze casting oil duct 11 → pressure oil interface 8 → through oil pipe entering oil hydraulic cylinder 1; The piston rod member of oil hydraulic cylinder 1 is stretched out; The jacking carriage of dump truck, this moment lifting angle, compartment as surpassing specified value, the lifting angle protection mechanism (parts that do not belong to the utility model) that is provided with on the dump truck will through on the valve rod 27 the spacing external member 16 pulling valve rods of valve rod on the bearing pin 25 that is provided with; Valve rod is oppositely retracted " meta " position and locking ball 19 location are arranged, with the trouble free service of protection dump truck.As stated, cause that when the dump truck overload hydraulic system pressure raises when surpassing safety valve 4 set pressures, safety valve 4 will be opened off-load, to protect the trouble free service of hydraulic system and unit, parts.
3) selector valve is in the position that descends
When the selector valve guiding valve vertically from meta when moving to left a design distance; The II platform of valve rod 27 will go out oil groove 33 partitions with selector valve by selector valve oil-feed tank 32; Selector valve goes out oil groove 33 and 34 communications of selector valve first oil-return groove simultaneously; Selector valve oil-feed tank 32 is linked up with selector valve second oil-return groove 35; Contract in the piston rod plug of corresponding oil hydraulic cylinder at this moment is that carriage of dump truck descends; One-way valve 3 is closed in its oil hydraulic cylinder cavity of resorption oil extraction; Avoid in the cylinder oil return to flow backwards into gear pump and get into selector valve and go out oil groove 33, this moment if gear pump still in rotation: for three circuit systems, its oil return route is the oil hydraulic cylinder cavity of resorption and the oil pump oil extraction goes out oil groove 33 and selector valve oil-feed tank 32 → inflows selector valve first oil-return groove 34 and selector valve second oil-return groove 35 → through system oil return passage to low pressure oil return inlet T → flow back to fuel tank (adorning three loop dividing busings in the bonnet at this moment) from selector valve respectively; Because of there not being three loop dividing busings, its oil extraction route is that oil hydraulic cylinder cavity of resorption and oil pump oil extraction go out oil groove 33 and selector valve oil-feed tank 32 → inflows selector valve first oil-return groove 34 and selector valve second oil-return groove 35 → through system oil return passage 12 to pump suction passage 9 (this oil return inlet T is blocked with plug screw) from selector valve respectively for secondary coolant circuit system.
Obviously, the foregoing description only be for explanation clearly done for example, and be not qualification to mode of execution.For the those of ordinary skill in affiliated field, on the basis of above-mentioned explanation, can also make other multi-form variation or change.Here need not also can't give exhaustive to all mode of executions.And conspicuous variation of being extended out thus or change still are among the protection domain of the utility model creation.
Claims (9)
1. the hoist control valve assembly of a dump truck; Comprise control loop; Said control loop through the feed flow in control oil hydraulic cylinder (1), return liquid and realize stretching out, withdraw of oil hydraulic cylinder (1) inner piston rod (2), it comprises that control is towards the interior feed flow of oil hydraulic cylinder (1) or from the selector valve of oil hydraulic cylinder (1) time liquid; Be arranged on by said selector valve place on the oil duct of the interior feed flow of said oil hydraulic cylinder (1), prevent the one-way valve (3) that in said oil hydraulic cylinder (1), refluxes; And the safety valve (4) of setting up said oil hydraulic cylinder (1) pressure maximum; It is characterized in that: also comprise a gear pump (17); Form on the bonnet (5) of said gear pump (17) and be fit to the mounting hole that each parts is installed in the said control loop; And with the oil duct of the corresponding connection of each parts in the said control loop; And form the oil-feed interface (6) and the oil return interface (7) that are communicated with fuel tank on the exterior edge face of the bonnet (5) of said gear pump (17) respectively, and the pressure oil interface (8) that is connected with the active chamber of said oil hydraulic cylinder (1); The inside of said bonnet (5) forms the pump suction passage (9) that said oil-feed interface (6) is communicated with said gear pump (17) oil sucting cavity; The pump oil drain passage (10) that said gear pump (17) oil-discharging cavity is communicated with the oil suction chamber of said selector valve; The squeeze casting oil duct (11) that said pressure oil interface (8) is communicated with the liquid outlet of said one-way valve (3); The system oil return passage (12) that the oil outlet of the return opening of said selector valve and said safety valve (4) is communicated with said oil return interface (7).
2. the hoist control valve assembly of dump truck according to claim 1; It is characterized in that: the corresponding position on the master of said gear pump (17), the pairing said bonnet in driven gear bearing hole bottom surface (5) respectively offers tapped aperture (13); Said aperture (13) one ends communicate with the inner draining passage of said gear pump (17); The other end communicates with said system oil return passage (12), and also is provided with stifled oily screw element (14) in the pairing said aperture of said driven gear (13).
3. the hoist control valve assembly of dump truck according to claim 2; It is characterized in that: said bonnet (5) comprises the cap portion that cooperates with the pump housing (15) of said gear pump (17); And the outer mounting portion of the pump housing (15) of stretching out gear pump (17) oil extraction side; Said selector valve and said one-way valve (3) and safety valve (4) are arranged on the said mounting portion, and said oil return interface (7) and said pressure oil interface (8) are molded on the exterior edge face on the said mounting portion.
4. the hoist control valve assembly of dump truck according to claim 3; It is characterized in that: the operating end of said selector valve is arranged on the interior edge face place of said bonnet (5); The valve rod of said selector valve (27) stretches out the exterior edge face of said bonnet (5); And the external part of said valve rod (27) is provided with and is connected with the lifting angle protection mechanism of dump truck, said valve rod (27) is returned to the valve rod limit stoper of said selector valve meta by the last raise-position of said selector valve.
5. the hoist control valve assembly of dump truck according to claim 4; It is characterized in that: said valve rod limit stoper comprises the valve rod stop collar (16) on the said output terminal that is set in said valve rod (27); And one be installed in said bonnet exterior edge face; Support the limiting bracket (26) of said valve rod stop collar; Said valve rod stop collar (16) can axially come and go in said limiting bracket (26) and move, and the part that said valve rod stop collar is positioned at outside the said limiting bracket (26) is provided with the suitable attachment portion that is connected with said lifting angle protection mechanism; Said valve rod stop collar (16) is positioned to form on the part of said limiting bracket (26) and prevents that said valve rod stop collar (16) from deviating from first limited step of said limiting bracket (26); And also form insertion groove on the sidewall of said valve rod stop collar (16); Said valve rod (27) is provided with horizontal bearing pin (25); The two ends of said bearing pin (25) are fit to insert in the said insertion groove; Said valve rod stop collar (16) oppositely spurs said valve rod (27) through said bearing pin (25), makes said valve rod (27) return the meta of said selector valve.
6. the hoist control valve assembly of dump truck according to claim 5; It is characterized in that: said selector valve is for manually controlling selector valve (18); When also comprising switching-over, to the positioning means that the valve rod (27) of said manual control selector valve (18) is located, said positioning means comprises the positioning ring groove on said valve rod (27) cylindrical that is molded over said selector valve; Be stuck in the positioning ball (19) in the said positioning ring groove; Prop up said positioning ball (19) and snap in the spring (20) in the said locating slot, and the fitting seat that said spring (20) are installed, said fitting seat comprises the body that forms tapped hole; And being arranged on the screw plug plug (21) in the tapped hole, the end that said screw plug plug (21) inserts in the said tapped hole forms the inner chamber that is fit to install said spring (20).
7. the hoist control valve assembly of dump truck according to claim 5; It is characterized in that: said selector valve is air-actuated direction valve assembly (22); The pneumatic operation of said air-actuated direction valve assembly (22) partly comprises the piston (28) that is arranged on valve rod (27) operating end; And be set on the said piston (28), the cylinder sleeve (29) that cooperates with said piston (28), the sidewall of said cylinder sleeve (29) axial direction is provided with two import/exhaust holes (30); Said piston (28) comes and goes between two said import/exhaust holes (30) and moves; It is round mobile to drive said valve rod (27) axial direction, when also comprising switching-over, to the spacing position-limit mechanism of said valve rod (27) of said air-actuated direction valve assembly (22); Said position-limit mechanism comprises second limited step that is molded over said cylinder sleeve (29) inwall; Be arranged between said second limited step and the said bonnet exterior edge face, oppositely be set on the said valve rod (27), have two limit spring seats (31) of flange; And be set on the said valve rod (27) conflict the respectively limit spring (36) and the locking nut (37) of flange of said two said limit spring seats (31) of two ends.
8. according to the hoist control valve assembly of each described dump truck among the claim 1-7, it is characterized in that: said system oil return passage (12) is provided with the dividing busing (23) that prevents that said system oil return passage (12) is connected with said pump suction passage (9) with the intersection of said pump suction passage (9) on said bonnet (5).
9. according to the hoist control valve assembly of each described dump truck among the claim 1-7; It is characterized in that: said oil return interface (7) is located to be provided with the screw plug (24) that said oil return interface (7) is stopped up, and said system oil return passage (12) communicates with said pump suction passage (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204162810U CN202273935U (en) | 2011-10-27 | 2011-10-27 | Lifting control valve assembly for self-dumping automobile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204162810U CN202273935U (en) | 2011-10-27 | 2011-10-27 | Lifting control valve assembly for self-dumping automobile |
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| Publication Number | Publication Date |
|---|---|
| CN202273935U true CN202273935U (en) | 2012-06-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2011204162810U Expired - Lifetime CN202273935U (en) | 2011-10-27 | 2011-10-27 | Lifting control valve assembly for self-dumping automobile |
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| CN (1) | CN202273935U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103939337A (en) * | 2014-04-23 | 2014-07-23 | 阜新安联液压有限公司 | Gear pump with built-in unloading device |
| CN104047929A (en) * | 2014-05-31 | 2014-09-17 | 魏连营 | Reversing oil pump station device |
| CN104100591A (en) * | 2013-04-01 | 2014-10-15 | 重庆航宇实业有限公司 | Engineering vehicle hydraulic pump valve integrated system |
| CN104214090A (en) * | 2014-08-08 | 2014-12-17 | 宁波雪隆王液压科技有限公司 | An integral structure of a gear pump and a jet flow valve |
| CN104912864A (en) * | 2015-06-04 | 2015-09-16 | 许昌市恒基机械有限公司 | Pressure-adjustable reversing valve and steel bar bender |
| CN105179350A (en) * | 2015-09-25 | 2015-12-23 | 北京科技大学 | Valve block assembly of three-way type lifting hydraulic system for dump truck |
-
2011
- 2011-10-27 CN CN2011204162810U patent/CN202273935U/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104100591A (en) * | 2013-04-01 | 2014-10-15 | 重庆航宇实业有限公司 | Engineering vehicle hydraulic pump valve integrated system |
| CN103939337A (en) * | 2014-04-23 | 2014-07-23 | 阜新安联液压有限公司 | Gear pump with built-in unloading device |
| CN104047929A (en) * | 2014-05-31 | 2014-09-17 | 魏连营 | Reversing oil pump station device |
| CN104214090A (en) * | 2014-08-08 | 2014-12-17 | 宁波雪隆王液压科技有限公司 | An integral structure of a gear pump and a jet flow valve |
| CN104912864A (en) * | 2015-06-04 | 2015-09-16 | 许昌市恒基机械有限公司 | Pressure-adjustable reversing valve and steel bar bender |
| CN105179350A (en) * | 2015-09-25 | 2015-12-23 | 北京科技大学 | Valve block assembly of three-way type lifting hydraulic system for dump truck |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120613 |