CN103507629B - For the hydraulic moving open-circuit system of double-cab fork truck - Google Patents
For the hydraulic moving open-circuit system of double-cab fork truck Download PDFInfo
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- CN103507629B CN103507629B CN201310510353.1A CN201310510353A CN103507629B CN 103507629 B CN103507629 B CN 103507629B CN 201310510353 A CN201310510353 A CN 201310510353A CN 103507629 B CN103507629 B CN 103507629B
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Abstract
The present invention relates to the hydraulic moving open-circuit system for double-cab fork truck.Comprise main hydraulic system and hydraulic control system, main hydraulic system comprises hydraulic reservoir, controllable capacity pump, system by pass valve, monostable flow divider valve, two four-way electromagnetic reversing valves, 3-position 4-way pilot operated directional control valve, front running motor and after running motors; Hydraulic control system comprises master and drives pedal type two-bit triplet priority valve and the passenger side pedal type two-bit triplet priority valve, leads and drive 3-position 4-way hand change over valve, the passenger side 3-position 4-way hand change over valve and shuttle valve.The present invention adopts single double motor switch operating system, achieves double-cab side fork lift truck in the switching of level walking with climbing operating mode, solves double-cab side fork lift truck level land traveling hourly velocity and requires high, and when climbing, the problem that demanded drive torque is large.Use hydraulic control frontier technology, what make that the fluid control valve of control vehicle to run can be convenient is arranged in operator's compartment, meets the driving habit of operating personal.
Description
Technical field
The invention belongs to fork truck technical field, being specifically related to the side fork lift truck for carrying long strip type goods in tunnel, ring road.
Background technology
Certain extraordinary side fork lift truck is used for carrying long strip type goods in tunnel, ring road, travel because the space constraint of operating environment causes vehicle cannot turn headstock, as adopted reverse travel, then can be bad due to the visual field of chaufeur, very easily cause vehicle and wall collisions, therefore, need to arrange operator's compartment respectively at vehicle two ends to carry out wagon control, double-cab requires that all can realize vehicle to run at two operator'ies compartment handles.In two operator'ies compartment of existing double-cab fork truck, a set of independently driving system is set respectively, often overlaps independently driving system and all comprise a controllable capacity pump, a main by pass valve, two running motors, two main control valves.Car load hydraulic travel system manufacturing cost is higher.
Summary of the invention
In order to the problem that the hydraulic travel system manufacturing cost solving existing double-cab fork truck is high, the present invention provides a kind of structure simple by structural development, good reliability, and meet navigating mate driving manipulation custom, for the hydraulic moving open-circuit system of double-cab fork truck.
Hydraulic moving open-circuit system for double-cab fork truck comprises main hydraulic system, and described main hydraulic system comprises hydraulic reservoir 1, controllable capacity pump 2, system by pass valve 4, monostable flow divider valve 5, two four-way electromagnetic reversing valves 8,3-position 4-way pilot operated directional control valve 9, front running motor 12 and after running motors 13; The oil suction Q1 mouth of described controllable capacity pump 2 is communicated with fuel tank respectively with pump housing release T1 mouth, and the oil-feed P1 mouth of controllable capacity pump 2 is communicated with the oil-feed P2 mouth of system by pass valve 4, the oil-feed P3 mouth of monostable flow divider valve 5 respectively by three-way pipe; The oil return T2 mouth of system by pass valve 4 is communicated with fuel tank; Monostable flow divider valve 5 has unstable state shunting A3 mouth and stable state shunting B3 mouth; The unstable state shunting A3 mouth of monostable flow divider valve 5 is communicated with the oil-feed P4 mouth of 3-position 4-way pilot operated directional control valve 9 and the feedback oil LS mouth of controllable capacity pump 2 respectively by three-way pipe; The oil return T4 mouth of 3-position 4-way pilot operated directional control valve 9 is communicated with fuel tank; First work A4 mouth of 3-position 4-way pilot operated directional control valve 9 is communicated with the first work A5 mouth of front running motor 12 and the first work A1 mouth of two four-way electromagnetic reversing valves 8 respectively by three-way pipe; Second work B4 mouth of 3-position 4-way pilot operated directional control valve 9 is communicated with the second work B5 mouth of front running motor 12 and the second work B1 mouth of two four-way electromagnetic reversing valves 8 respectively by three-way pipe; The release T5 mouth of front running motor 12 is communicated with fuel tank; 3rd work C1 mouth of two four-way electromagnetic reversing valves 8 is communicated with the first work A6 mouth of after running motor 13, and the 4th work D1 mouth of two four-way electromagnetic reversing valves 8 is communicated with the second work B6 mouth of after running motor 13; The release T6 mouth of after running motor 13 is communicated with fuel tank;
Also comprise hydraulic control system, described hydraulic control system comprises master and drives pedal type two-bit triplet priority valve 16 and the passenger side pedal type two-bit triplet priority valve 17, leads and drive 3-position 4-way hand change over valve 18, the passenger side 3-position 4-way hand change over valve 19, shuttle valve 20 and shuttle valve 21; The stable state shunting B3 mouth of described monostable flow divider valve 5 is communicated with respectively by three-way pipe mainly drives the oil-feed E1 mouth of pedal type two-bit triplet priority valve 16 and the oil-feed E2 mouth of the passenger side pedal type two-bit triplet priority valve 17; The working oil F1 mouth that described master drives pedal type two-bit triplet priority valve 16 is communicated with the main oil-feed J1 mouth driving 3-position 4-way hand change over valve 18, and the main oil return G1 mouth driving pedal type two-bit triplet priority valve 16 is communicated with fuel tank with the main oil return K1 mouth driving 3-position 4-way hand change over valve 18 respectively by three-way pipe; The first work M1 mouth that described master drives 3-position 4-way hand change over valve 18 is communicated with the first oil-feed U2 mouth of shuttle valve 21, and main the second work N1 mouth driving 3-position 4-way hand change over valve 18 is communicated with the first oil inlet U1 of shuttle valve 20; The work F2 mouth of described the passenger side pedal type two-bit triplet priority valve 17 is communicated with the oil-feed J2 mouth of the passenger side 3-position 4-way hand change over valve 19, and the oil return G2 mouth of the passenger side pedal type two-bit triplet priority valve 17 is communicated with oil return K2 mouth and the fuel tank of the passenger side 3-position 4-way hand change over valve 19 respectively by three-way pipe; First actuator port M2 of described the passenger side 3-position 4-way hand change over valve 19 is communicated with the second oil-feed V1 mouth of shuttle valve 20, and the second working oil N2 mouth of the passenger side 3-position 4-way hand change over valve 19 is communicated with the second oil-feed V2 mouth of shuttle valve 21; The fuel-displaced W1 mouth of shuttle valve 20 is communicated with first of described 3-position 4-way pilot operated directional control valve 9 and controls oily X mouth, and the fuel-displaced W2 mouth of shuttle valve 21 is communicated with second of described 3-position 4-way pilot operated directional control valve 9 and controls oily Y mouth.
The stable state shunting B3 mouth of described monostable flow divider valve 5 is provided with controlling water kick valve.
Advantageous Effects of the present invention embodies in the following areas:
1. the driving that the present invention uses a set of integrated hydraulic moving open-circuit system to achieve double-cab side fork lift truck is handled; Adopt single double motor switch operating system, achieve double-cab side fork lift truck in the switching of level walking with climbing operating mode, solve double-cab side fork lift truck level land traveling hourly velocity and require high, and when climbing, the problem that demanded drive torque is large;
2. the present invention uses hydraulic control frontier technology, and what make that the fluid control valve of control vehicle to run can be convenient is arranged in operator's compartment, meets the driving habit of operating personal;
3. structure of the present invention is simple, and good economy performance, reliability is high.
Accompanying drawing explanation
Fig. 1 is present system structural representation.
Sequence number in upper figure: hydraulic reservoir 1, controllable capacity pump 2, system by pass valve 4, monostable flow divider valve 5, two four-way electromagnetic reversing valves 8,3-position 4-way pilot operated directional control valve 9, front running motor 12, after running motor 13, master drive pedal type two-bit triplet priority valve 16, the passenger side pedal type two-bit triplet priority valve 17, lead and drive 3-position 4-way hand change over valve 18, the passenger side 3-position 4-way hand change over valve 19, shuttle valve 20 and shuttle valve 21.
Detailed description of the invention
Below in conjunction with accompanying drawing, by embodiment, the present invention is further illustrated.
Embodiment:
See Fig. 1, hydraulic moving open-circuit system for double-cab fork truck comprises main hydraulic system, and described main hydraulic system comprises hydraulic reservoir 1, controllable capacity pump 2, system by pass valve 4, monostable flow divider valve 5, two four-way electromagnetic reversing valves 8,3-position 4-way pilot operated directional control valve 9, front running motor 12 and after running motors 13; The oil suction Q1 mouth of described controllable capacity pump 2 is communicated with fuel tank respectively with pump housing release T1 mouth, and the oil-feed P1 mouth of controllable capacity pump 2 is communicated with the oil-feed P2 mouth of system by pass valve 4, the oil-feed P3 mouth of monostable flow divider valve 5 respectively by three-way pipe; The oil return T2 mouth of system by pass valve 4 is communicated with fuel tank; Monostable flow divider valve 5 has unstable state shunting A3 mouth and stable state shunting B3 mouth; The unstable state shunting A3 mouth of monostable flow divider valve 5 is communicated with the oil-feed P4 mouth of 3-position 4-way pilot operated directional control valve 9 and the feedback oil LS mouth of controllable capacity pump 2 respectively by three-way pipe; The oil return T4 mouth of 3-position 4-way pilot operated directional control valve 9 is communicated with fuel tank; First work A4 mouth of 3-position 4-way pilot operated directional control valve 9 is communicated with the first work A5 mouth of front running motor 12 and the first work A1 mouth of two four-way electromagnetic reversing valves 8 respectively by three-way pipe; Second work B4 mouth of 3-position 4-way pilot operated directional control valve 9 is communicated with the second work B5 mouth of front running motor 12 and the second work B1 mouth of two four-way electromagnetic reversing valves 8 respectively by three-way pipe; The release T5 mouth of front running motor 12 is communicated with fuel tank; 3rd work C1 mouth of two four-way electromagnetic reversing valves 8 is communicated with the first work A6 mouth of after running motor 13, and the 4th work D1 mouth of two four-way electromagnetic reversing valves 8 is communicated with the second work B6 mouth of after running motor 13; The release T6 mouth of after running motor 13 is communicated with fuel tank;
Also comprise hydraulic control system, hydraulic control system comprises master and drives pedal type two-bit triplet priority valve 16 and the passenger side pedal type two-bit triplet priority valve 17, leads and drive 3-position 4-way hand change over valve 18, the passenger side 3-position 4-way hand change over valve 19, shuttle valve 20 and shuttle valve 21; The stable state shunting B3 mouth of described monostable flow divider valve 5 is communicated with respectively by three-way pipe mainly drives the oil-feed E1 mouth of pedal type two-bit triplet priority valve 16 and the oil-feed E2 mouth of the passenger side pedal type two-bit triplet priority valve 17; The working oil F1 mouth that described master drives pedal type two-bit triplet priority valve 16 is communicated with the main oil-feed J1 mouth driving 3-position 4-way hand change over valve 18, and the main oil return G1 mouth driving pedal type two-bit triplet priority valve 16 is communicated with fuel tank with the main oil return K1 mouth driving 3-position 4-way hand change over valve 18 respectively by three-way pipe; The first work M1 mouth that described master drives 3-position 4-way hand change over valve 18 is communicated with the first oil-feed U2 mouth of shuttle valve 21, and main the second work N1 mouth driving 3-position 4-way hand change over valve 18 is communicated with the first oil inlet U1 of shuttle valve 20; The work F2 mouth of described the passenger side pedal type two-bit triplet priority valve 17 is communicated with the oil-feed J2 mouth of the passenger side 3-position 4-way hand change over valve 19, and the oil return G2 mouth of the passenger side pedal type two-bit triplet priority valve 17 is communicated with oil return K2 mouth and the fuel tank of the passenger side 3-position 4-way hand change over valve 19 respectively by three-way pipe; First actuator port M2 of described the passenger side 3-position 4-way hand change over valve 19 is communicated with the second oil-feed V1 mouth of shuttle valve 20, and the second working oil N2 mouth of the passenger side 3-position 4-way hand change over valve 19 is communicated with the second oil-feed V2 mouth of shuttle valve 21; The fuel-displaced W1 mouth of shuttle valve 20 is communicated with first of described 3-position 4-way pilot operated directional control valve 9 and controls oily X mouth, and the fuel-displaced W2 mouth of shuttle valve 21 is communicated with second of described 3-position 4-way pilot operated directional control valve 9 and controls oily Y mouth.
The stable state shunting B3 mouth of monostable flow divider valve 5 is provided with controlling water kick valve, protects hydraulic control system.
Described two four-way electromagnetic reversing valves 8, when electromagnet no power, the first work A1 mouth, the second work B1 mouth is all in off-state, and the 3rd work C1 mouth and the 4th D1 mouth that works is communicated with; When the solenoid is energized, the first work A1 mouth and the 3rd C1 mouth that works is connected, and the second working oil B1 mouth and the 4th D1 mouth that works is connected.Its Main Function is realize the function that single motor is walked and double motor is walked to switch.
Described 3-position 4-way pilot operated directional control valve 9, when first controls oily X mouth, the oily Y mouth of the second control all without pressure, switches to meta, and its oil-feed P4 mouth, oil return T4 mouth, the first work A4 mouth and the second work B4 mouth are all communicated with.When first control oily X mouth have pressure time, switch to left position, oil-feed P4 mouth and the first A4 mouth that works is connected, and oil return T4 mouth and the second B4 mouth that works is connected; When second control oily Y mouth have pressure time, switch to right position, oil-feed P4 mouth and the second B4 mouth that works is connected, and oil return T4 mouth and the first A4 mouth that works is connected; Its Main Function is that the direction of travel of the advance and retrogressing realizing vehicle switches.
Described master drives pedal type two-bit triplet priority valve 16 when pedal unclamps, and is in bottom, and oil-feed E1 mouth disconnects, and work F1 mouth is communicated with oil return G1 mouth; When push down on the pedal, master drives pedal type two-bit triplet priority valve 16 and is in upper, and oil-feed E1 mouth is communicated with work F1 mouth, and oil return G1 mouth disconnects.Described the passenger side pedal type two-bit triplet priority valve 17 principle of work drives pedal type two-bit triplet priority valve 16 with main, and its Main Function is the moving velocity controlling vehicle, and be specifically arranged in the right crus of diaphragm position of chaufeur, functional equivalent is in the throttle of automobile.
Described master drives 3-position 4-way hand change over valve 18 when being in meta, and its oil-feed J1 mouth, oil return K1 mouth, the first work M1 mouth and the second work N1 mouth are all communicated with; When manual reverse of direction is to left position, oil-feed J1 mouth and the second N1 mouth that works is connected, and the first work M1 mouth and oil return K1 mouth is connected; When manual reverse of direction is to right position, oil-feed J1 mouth and the first M1 mouth that works is connected, and the second work N1 mouth and oil return K1 mouth is connected.Described the passenger side 3-position 4-way hand change over valve 19 principle of work drives 3-position 4-way hand change over valve 18 with main.Its Main Function is the transposition controlling 3-position 4-way pilot operated directional control valve 9, and realize advance and the retrogressing of vehicle, be specifically arranged in the right hand direction of chaufeur, functional equivalent is shifted gears in the front and back of automobile.
Specific works principle of the present invention is as follows:
Work as driver actuation, do not handle master and drive 3-position 4-way hand change over valve 18 and the passenger side 3-position 4-way hand change over valve 19, master drives 3-position 4-way hand change over valve 18 and the passenger side 3-position 4-way hand change over valve 19 is all in meta.Do not step on master and drive pedal type two-bit triplet priority valve 16 and the passenger side pedal type two-bit triplet priority valve 17, master drives pedal type two-bit triplet priority valve 16 and the passenger side pedal type two-bit triplet priority valve 17 is all in bottom.Controllable capacity pump 2 is from hydraulic reservoir 1 oil suction, hydraulic oil through the oil-feed P1 mouth of controllable capacity pump 2, three-way pipe to the oil-feed P3 mouth of monostable flow divider valve 5, a part of hydraulic oil is supplied to hydraulic control system from stable state shunting B3 mouth by monostable flow divider valve 5, and the hydraulic oil of hydraulic control system flows to master respectively through three-way pipe and drives pedal type two-bit triplet priority valve 16 and the passenger side pedal type two-bit triplet priority valve 17.Now because main drive pedal type two-bit triplet priority valve 16 be all in bottom with the passenger side pedal type two-bit triplet priority valve 17, the oil-feed E2 mouth of main the oil-feed E1 mouth and the passenger side pedal type two-bit triplet priority valve 17 of driving pedal type two-bit triplet priority valve 16 all disconnects, and controls oil through the oil return T3 mouth of monostable flow divider valve 5 and overflows back fuel tank.After stable state is divided oil by monostable flow divider valve 5, remaining hydraulic oil is discharged from unstable state shunting A3 mouth, through three-way pipe to the oil-feed P4 mouth of 3-position 4-way pilot operated directional control valve 9, now first of 3-position 4-way pilot operated directional control valve 9 controls oily X mouth, the oily Y mouth of the second control is all in meta without pressure, fluid is through the oil return T4 mouth oil sump tank of 3-position 4-way pilot operated directional control valve 9, and vehicle remains static.
When vehicle operation is on smooth road surface, need when master drives operation vehicle advance traveling, master being driven 3-position 4-way hand change over valve 18 commutates to left position, step on master and drive pedal type two-bit triplet priority valve 16, master drives pedal type two-bit triplet priority valve 16 and switches to upper, control fluid through the main oil-feed E1 mouth driving pedal type two-bit triplet priority valve 16, work F1 mouth, the main oil-feed J1 mouth driving 3-position 4-way hand change over valve 18, second work N1 mouth is to the first oil-feed U1 mouth of shuttle valve 20, under the effect of pressure oil, second oil-feed V1 mouth of shuttle valve 20 is closed, control the first control oily X mouth of fluid through the fuel-displaced W1 mouth arrival 3-position 4-way pilot operated directional control valve 9 of shuttle valve 20, promote 3-position 4-way pilot operated directional control valve 9 to replace to left position.The pressure oil of main system is through oil-feed P4 mouth, the first work A4 mouth of 3-position 4-way pilot operated directional control valve 9, three-way pipe is to the first work A5 mouth of front running motor 12, running motor 12 left-hand revolution before driving, second work B5 mouth of the premenstrual running motor 12 of oil return of front running motor 12, three-way pipe, second work B4 mouth of 3-position 4-way pilot operated directional control valve 9, oil return T4 mouth oil sump tank, achieve vehicle and travel in main advance of driving.
When vehicle operation is on smooth road surface, need when master drives operation vehicle rollback traveling, master being driven 3-position 4-way hand change over valve 18 commutates to right position, step on master and drive pedal type two-bit triplet priority valve 16, master drives pedal type two-bit triplet priority valve 16 and switches to upper, control fluid through the main oil-feed E1 mouth driving pedal type two-bit triplet priority valve 16, work F1 mouth, the main oil-feed J1 mouth driving 3-position 4-way hand change over valve 18, first work M1 mouth is to the first oil-feed U2 mouth of shuttle valve 21, under the effect of pressure oil, second oil-feed V2 mouth of shuttle valve 21 is closed, control the second control oily Y mouth of fluid through the fuel-displaced W2 mouth arrival 3-position 4-way pilot operated directional control valve 9 of shuttle valve 21, promote 3-position 4-way pilot operated directional control valve 9 to replace to right position.The pressure oil of main system is through oil-feed P4 mouth, the second work B4 mouth of 3-position 4-way pilot operated directional control valve 9, three-way pipe 10 is to the second work B5 mouth of front running motor 12, running motor 12 clickwise before driving, first work A5 mouth of the premenstrual running motor 12 of oil return of front running motor 12, three-way pipe, first work A4 mouth of 3-position 4-way pilot operated directional control valve 9, oil return T4 mouth oil sump tank, achieve vehicle and travel in main retrogressing of driving.
When vehicle operation is on smooth road surface, need when the passenger side operation vehicle advances traveling, the passenger side 3-position 4-way hand change over valve 19 is commutated to right position, step on the passenger side pedal type two-bit triplet priority valve 17, the passenger side pedal type two-bit triplet priority valve 17 switches to upper, control the oil-feed E2 mouth of fluid through the passenger side pedal type two-bit triplet priority valve 17, work F2 mouth, the oil-feed J2 mouth of the passenger side 3-position 4-way hand change over valve 19, second work N2 mouth is to the second oil-feed V2 mouth of shuttle valve 21, under the effect of pressure oil, first oil-feed U2 mouth of shuttle valve 21 is closed, control the second control oily Y mouth of fluid through the fuel-displaced W2 mouth arrival 3-position 4-way pilot operated directional control valve 9 of shuttle valve 21, promote 3-position 4-way pilot operated directional control valve 9 to replace to right position.The pressure oil of main system is through oil-feed P4 mouth, the second work B4 mouth of 3-position 4-way pilot operated directional control valve 9, three-way pipe is to the second work B5 mouth of front running motor 12, running motor 12 clickwise before driving, first work A5 mouth of the premenstrual running motor 12 of oil return of front running motor 12, three-way pipe, first work A4 mouth of 3-position 4-way pilot operated directional control valve 9, oil return T4 mouth oil sump tank, achieve vehicle and travel in the advance of the passenger side.
When vehicle operation is on smooth road surface, need when the passenger side operation vehicle rollback travels, the passenger side 3-position 4-way hand change over valve 19 is commutated to left position, step on the passenger side pedal type two-bit triplet priority valve 17, the passenger side pedal type two-bit triplet priority valve 17 switches to upper, control the oil-feed E2 mouth of fluid through the passenger side pedal type two-bit triplet priority valve 17, work F2 mouth, the oil-feed J2 mouth of the passenger side 3-position 4-way hand change over valve 19, first work M2 mouth is to the second oil-feed V1 mouth of shuttle valve 20, under the effect of pressure oil, first oil-feed U1 mouth of shuttle valve 20 is closed, control the first control oily X mouth of fluid through the fuel-displaced W1 mouth arrival 3-position 4-way pilot operated directional control valve 9 of shuttle valve 20, promote 3-position 4-way pilot operated directional control valve 9 to replace to left position.The pressure oil of main system is through oil-feed P4 mouth, the first work A4 mouth of 3-position 4-way pilot operated directional control valve 9, three-way pipe is to the first work A5 mouth of front running motor 12, running motor 12 left-hand revolution before driving, second work B5 mouth of the premenstrual running motor 12 of oil return of front running motor 12, three-way pipe, second work B4 mouth of 3-position 4-way pilot operated directional control valve 9, oil return T4 mouth oil sump tank, achieve vehicle and travel in the retrogressing of the passenger side.
When vehicle needs the climbing carrying out larger angle to travel, can operation sheet double motor change-over switch, two four-way electromagnetic reversing valve 8 electromagnet are allowed to be energized, now the first work A4 mouth of 3-position 4-way pilot operated directional control valve 9 passes through three-way pipe, one tunnel directly connects the A5 mouth of front running motor 12, separately leads up to the first work A1 mouth of two four-way electromagnetic reversing valves 8, the 3rd work C1 mouth to connect the A6 mouth of after running motor 13.Second work B4 mouth of 3-position 4-way pilot operated directional control valve 9 is by three-way pipe, and a road directly connects the B5 mouth of front running motor 12, separately leads up to the second work B1 mouth of two four-way electromagnetic reversing valves 8, the 4th work D1 mouth to connect the B6 mouth of after running motor 13.Now before walking, running motor 12 and after running motor 13 can realize working simultaneously, add the propulsive effort of vehicle.
Claims (2)
1. for the hydraulic moving open-circuit system of double-cab fork truck, comprise main hydraulic system, described main hydraulic system comprises hydraulic reservoir (1), controllable capacity pump (2), system by pass valve (4), monostable flow divider valve (5), two four-way electromagnetic reversing valves (8), 3-position 4-way pilot operated directional control valve (9), front running motor (12) and after running motors (13); The oil suction Q1 of described controllable capacity pump (2) is communicated with fuel tank respectively with pump housing relief port T1, and the oil inlet P 1 of controllable capacity pump (2) is communicated with the oil inlet P 3 of the oil inlet P 2 of system by pass valve (4), monostable flow divider valve (5) respectively by three-way pipe; The oil return inlet T 2 of system by pass valve (4) is communicated with fuel tank; Monostable flow divider valve (5) has unstable state diffluence pass A3 and stable state diffluence pass B3; The unstable state diffluence pass A3 of monostable flow divider valve (5) is communicated with the oil inlet P 4 of 3-position 4-way pilot operated directional control valve (9) and the feedback hydraulic fluid port LS of controllable capacity pump (2) respectively by three-way pipe; The oil return inlet T 4 of 3-position 4-way pilot operated directional control valve (9) is communicated with fuel tank; First working hole A4 of 3-position 4-way pilot operated directional control valve (9) is communicated with the first working hole A1 of first working hole A5 and two four-way electromagnetic reversing valve (8) of front running motor (12) respectively by three-way pipe; Second working hole B4 of 3-position 4-way pilot operated directional control valve (9) is communicated with the second working hole B1 of second working hole B5 and two four-way electromagnetic reversing valve (8) of front running motor (12) respectively by three-way pipe; The relief port T5 of front running motor (12) is communicated with fuel tank; 3rd working hole C1 of two four-way electromagnetic reversing valves (8) is communicated with the first working hole A6 of after running motor (13), and the 4th working hole D1 of two four-way electromagnetic reversing valves (8) is communicated with the second working hole B6 of after running motor (13); The relief port T6 of after running motor (13) is communicated with fuel tank; It is characterized in that: also comprise hydraulic control system, described hydraulic control system comprises master and drives pedal type two-bit triplet priority valve (16) and the passenger side pedal type two-bit triplet priority valve (17), leads and drive 3-position 4-way hand change over valve (18), the passenger side 3-position 4-way hand change over valve (19), the first shuttle valve (20) and the second shuttle valve (21); The stable state diffluence pass B3 of described monostable flow divider valve (5) is communicated with respectively by three-way pipe and main drives the oil inlet E1 of pedal type two-bit triplet priority valve (16) and the oil inlet E2 of the passenger side pedal type two-bit triplet priority valve (17); The actuator port F1 that described master drives pedal type two-bit triplet priority valve (16) is communicated with the main oil inlet J1 driving 3-position 4-way hand change over valve (18), and the main return opening G1 driving pedal type two-bit triplet priority valve (16) is communicated with fuel tank with the main return opening K1 driving 3-position 4-way hand change over valve (18) respectively by three-way pipe; The first working hole M1 that described master drives 3-position 4-way hand change over valve (18) is communicated with the first oil inlet U2 of the second shuttle valve (21), and main the second working hole N1 driving 3-position 4-way hand change over valve (18) is communicated with the first oil inlet U1 of the first shuttle valve (20); The working hole F2 of described the passenger side pedal type two-bit triplet priority valve (17) is communicated with the oil inlet J2 of the passenger side 3-position 4-way hand change over valve (19), and the return opening G2 of the passenger side pedal type two-bit triplet priority valve (17) is communicated with return opening K2 and the fuel tank of the passenger side 3-position 4-way hand change over valve (19) respectively by three-way pipe; First actuator port M2 of described the passenger side 3-position 4-way hand change over valve (19) is communicated with the second oil inlet V1 of the first shuttle valve (20), and the second actuator port N2 of the passenger side 3-position 4-way hand change over valve (19) is communicated with the second oil inlet V2 of the second shuttle valve (21); The oil outlet W1 of the first shuttle valve (20) is communicated with the first control port X of described 3-position 4-way pilot operated directional control valve (9), and the oil outlet W2 of the second shuttle valve (21) is communicated with the second control port Y of described 3-position 4-way pilot operated directional control valve (9).
2. the hydraulic moving open-circuit system for double-cab fork truck according to claim 1, is characterized in that: the stable state diffluence pass B3 of described monostable flow divider valve (5) is provided with controlling water kick valve.
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| CN201310510353.1A CN103507629B (en) | 2013-10-26 | 2013-10-26 | For the hydraulic moving open-circuit system of double-cab fork truck |
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| CN201310510353.1A CN103507629B (en) | 2013-10-26 | 2013-10-26 | For the hydraulic moving open-circuit system of double-cab fork truck |
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| CN103507629B true CN103507629B (en) | 2016-03-02 |
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| CN108799484A (en) * | 2018-06-30 | 2018-11-13 | 刘剑 | The shift-position control apparatus of vehicle |
| CN109278875A (en) * | 2018-08-21 | 2019-01-29 | 北京必选信息技术有限公司 | A kind of flat car with double-cab applied to coal industry |
| CN110131226B (en) * | 2019-06-11 | 2024-03-01 | 徐州海伦哲特种车辆有限公司 | Walking control valve of crawler-type hydraulic walking system and walking system |
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| CN203186191U (en) * | 2013-03-05 | 2013-09-11 | 苏州大方特种车股份有限公司 | Concave-type tunnel transport cart |
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| CN203611746U (en) * | 2013-10-26 | 2014-05-28 | 安徽合力股份有限公司 | Hydraulic travelling open-type system for forklift truck with double driving cabs |
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| DE2429005B1 (en) * | 1974-06-18 | 1975-09-18 | Martin Beilhack Maschinenfabrik Und Hammerwerk Gmbh, 8200 Rosenheim | Lorry snow plough attachment - is hydraulically controlled from auxiliary driving cab at vehicle rear when clearing snow |
| CN101498217A (en) * | 2009-03-05 | 2009-08-05 | 燕山大学 | Split type remote operation ultra-low laneway coal mining apparatus transportation platform |
| CN102444099A (en) * | 2010-10-14 | 2012-05-09 | 哈尔滨清阳环保设备科技开发有限公司 | Ride-on multifunctional electric snow remover |
| CN203186191U (en) * | 2013-03-05 | 2013-09-11 | 苏州大方特种车股份有限公司 | Concave-type tunnel transport cart |
| CN103332133A (en) * | 2013-07-10 | 2013-10-02 | 山西中煤华晋能源有限责任公司 | Miniature all-wheel drive trackless rubber-tire vehicle |
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Also Published As
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|---|---|
| CN103507629A (en) | 2014-01-15 |
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