CN102602852A - Hydraulic hybrid stacking machine - Google Patents
Hydraulic hybrid stacking machine Download PDFInfo
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- CN102602852A CN102602852A CN2012100800135A CN201210080013A CN102602852A CN 102602852 A CN102602852 A CN 102602852A CN 2012100800135 A CN2012100800135 A CN 2012100800135A CN 201210080013 A CN201210080013 A CN 201210080013A CN 102602852 A CN102602852 A CN 102602852A
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Abstract
The invention provides a hydraulic hybrid power forklift, which comprises a lifting oil cylinder, a drive axle, a first hydraulic motor, a second hydraulic motor, a first hydraulic pump, an engine, a coupler and an energy accumulator, wherein the power output of the engine is transmitted to the coupler, and the power output of the coupler drives the drive axle; potential energy generated by the heavy object in the working process drives the lifting oil cylinder to generate hydraulic energy, the hydraulic energy drives the second hydraulic motor, the second hydraulic motor drives the first hydraulic pump to rotate, the hydraulic energy generated by the second hydraulic pump is stored in the energy accumulator, the energy accumulator drives the first hydraulic motor, and the first hydraulic motor outputs power to drive the coupler. By the technical scheme, potential energy is recycled when the portal frame descends, the recycled potential energy is used for starting the machine, lifting the portal frame in a short distance and the like, energy consumption of the system can be effectively saved, the problem of hydraulic fittings is solved, and cost is reduced.
Description
Technical field
The present invention relates to a kind of Forklift,, relate in particular to parallel hydraulic hybrid Forklift in particular to a kind of energy-conservation Forklift.
Background technology
Empty van freight container Forklift is that a kind of freight container is periodically carried the implement with stacking, needs Fraquent start braking and lifting container oscilaltion in the course of the work.In the suspender decline process, most of potential energy consumes in vain, does not recycle, and energy dissipation is serious, and car load starts frequently in the operation process, causes engine efficiency low, and the oil consumption of going is higher.
Conventional parallel formula hydraulic hybrid power vehicles (like bus, heavily card, loader etc.) all is to reclaim braking energy to carry out energy-conservationly, i.e. the motor of glancing impact parallel connection uses as pump, is the high-voltage energy storage device topping up, and the high pressure oil of recovery is used further to the auxiliary machine that opens.
Existing correlation technique mainly contains following shortcoming:
1. braking energy reclaims and must adopt pump-motor dual purpose special variable motor since the hydraulic hybrid technology that is that all right is ripe, do not have the accessory of standard optional, the hydraulic fittings of hybrid power is restricted.
2. when glancing impact had requirement to vehicle braked distance and speed, it is very complicated that control system will become, and the function unit of increase is also many.
3. energy-saving effect and braking frequency are directly proportional, and common driving vehicle often energy-saving effect is not good.
When the Forklift door frame descended, the hydraulic efficiency pressure system discharge capacity was big but pressure is lower, must just can charge in the accumulator after the supercharging, requires the door frame descending speed adjustable, can't influence operating characteristic during topping up.
The hydraulic pressure recovery scheme that can use for reference at present has:
1, pressurized cylinder mode, the big discharge capacity low pressure oil when door frame descends changes high pressure float gauging into through pressurized cylinder, charges in the energy storage.Shortcoming is a pressurized cylinder speed governing difficulty, and is discontinuous during two pressurized cylinder switching-overs, exists and impacts.
2, walking car two glancing impacts are because inertia is very big, and pressure is very high, is the high pressure accumulator topping up easily.But when the Forklift door frame descends, low oil pressure, traditional method is not suitable for the Forklift operating mode.
Therefore, to existing correlation technique, need the problem of solution following:
1. reclaim door frame gravitional force and fall, charge into high-voltage energy storage device after low pressure oil is changed into high pressure oil;
2. the accumulator supercharging pressure is gradual change, how to stablize its pressure;
3. the door frame speed of fall is different according to different working conditions speed, requires controlled;
4. running motor realizes that without double-purpose motor accessory is general;
5. reclaim the utilization of back hydraulic pressure ability.
Summary of the invention
For one of solving the problems of the technologies described above at least, the invention provides a kind of hydraulic hybrid Forklift.
Hydraulic hybrid Forklift provided by the invention; Comprise: elevating ram, drive axle, first HM Hydraulic Motor, second HM Hydraulic Motor, first Hydraulic Pump, driving engine, coupler and energy storage; Wherein, Said engine power exports said coupler to, and said coupler takeoff output drives said drive axle; The potential energy of weight generation drives said elevating ram and produces the hydraulic pressure ability at work; Said hydraulic pressure can drive said second HM Hydraulic Motor; Said first Hydraulic Pump rotation of said second fluid motor-driven; The hydraulic pressure that said second Hydraulic Pump produces can be stored in the said energy storage, and said energy storage drives said first HM Hydraulic Motor, and the said first HM Hydraulic Motor outputting power drives said coupler.
In this technical scheme, the potential energy in the time of can descending to the Forklift door frame carries out recycling, and the potential energy when being about to door frame decline converts the hydraulic pressure ability into through driving elevating ram; And the hydraulic pressure of the low-pressure hydraulic oil form that elevating ram is produced through second HM Hydraulic Motor and first Hydraulic Pump can be converted into the hydraulic pressure of high-pressure and hydraulic oil form can; And be stored in the energy storage, can drive first motor with the hydraulic pressure in the energy storage then, and then drive the drive axle of Forklift; Thereby the potential energy that makes door frame descend is able to reclaim and utilize; Avoid in the door frame decline process potential energy to consume in vain and caused energy dissipation, can reduce the expenditure of energy of Forklift, practiced thrift cost.
Preferably, also comprise change speed gear box, said change speed gear box is passed to said coupler with said engine output power.
Perhaps, also comprise change speed gear box, said change speed gear box is passed to said drive axle with said coupler outputting power.
Driving engine, change speed gear box and coupler adopt above-mentioned two kinds of connection modes, both can satisfy the needs that the present invention reclaimed and utilized door frame potential energy, can realize the different working conditions requirement again.
In technique scheme, preferably, also comprise second Hydraulic Pump, wherein, said change speed gear box drives the rotation of second Hydraulic Pump, and the hydraulic pressure that said second Hydraulic Pump produces can drive elevating ram lifting weight.
In this technical scheme, can utilize the driving engine and/or the first HM Hydraulic Motor outputting power, drive second Hydraulic Pump through change speed gear box; Thereby drive elevating ram work; Therefore, can further improve the ability of elevating ram lifting weight, satisfy different working condition requirements.
Preferably, said energy storage can also the said elevating ram lifting of direct drive weight.Adopt this technical scheme, in of short duration lifting action, start the engine not only adopts that energy stored drives elevating ram in the energy storage, realizes energy-conservationly, can reduce driving engine simultaneously and play the machine number of times, the life-span of prolongation driving engine.
Preferably, also comprise control cock, said energy storage drives said first HM Hydraulic Motor and/or drives said elevating ram lifting weight through said control cock.In this technical scheme, adopt control cock to control as required to the use behind the collection door frame potential energy, make full use of the door frame potential energy of collecting.
Preferably, said second HM Hydraulic Motor is big discharge capacity variable-dis-placement motor, and said first Hydraulic Pump is a float amount controllable capacity pump.In this technical scheme; Adopt the interlock of variable-dis-placement motor and controllable capacity pump; When the potential energy when door frame is descended reclaimed, the fluid of the low pressure and mass flow in the time of can door frame being descended converted the fluid of high-pressure low-flow into, is stored in the energy storage thereby door frame potential energy is converted into the high pressure liquid pressure energy; In addition, adopt variable-dis-placement motor, can control the descending speed of door frame; Prevent that unexpected generation and hydraulic efficiency pressure system are overheated; Adopt controllable capacity pump can adjust mouth pressure along with the rising of energy storage pressure, what solve the gradual change of energy storage supercharging pressure is topic, is convenient to the storage of energy.
Preferably, also comprise change-over valve, said change-over valve selectively is connected said elevating ram with said second Hydraulic Pump, said energy storage or said second HM Hydraulic Motor.In this technical scheme, adopt change-over valve to realize the storage of the work of elevating ram, hydraulic pressure ability, control is convenient, can control according to operating mode and needs, and cost is low, is easy to realize.
Preferably, said change-over valve is two four-way electromagnetic reversing valves.In this technical scheme, adopt two four-way electromagnetic reversing valves then to control flexibly, can through control in two position four-way solenoid valves electromagnet whether electric two position four-way solenoid valves that make are in diverse location.When electromagnet must not when electricity, two position four-way solenoid valves are in and make that elevating ram is connected with second Hydraulic Pump, and the direct coupled position of energy storage oil circuit; When electromagnet gets when electric, two position four-way solenoid valves are in and make the elevating ram and the second HM Hydraulic Motor oil circuit bonded assembly position.Therefore, use two position four-way solenoid valves can realize Long-distance Control and automatic guidance, improve the alerting ability of control accuracy and control.
Preferably, between the inlet of said second HM Hydraulic Motor and fuel tank, also be provided with by pass valve, also be provided with filter in the exit of said second HM Hydraulic Motor and the entrance of said first Hydraulic Pump, said first HM Hydraulic Motor is a variable-dis-placement motor.Between the inlet of said variable-dis-placement motor and fuel tank, also be provided with by pass valve, can avoid in the variable-dis-placement motor pressure excessive and produce potential safety hazard effectively, guaranteed the safety of variable-dis-placement motor, improved the reliability of system; Also be provided with filter in the exit of said variable-dis-placement motor and the entrance of said controllable capacity pump, can filtering system in foreign matter in the fluid, the fluid of door frame potential energy recovery system is more cleaned, prolonged the service life of system, reduced the fault of system; Said motor also adopts variable-dis-placement motor, then can satisfy the operating needs of different operating modes according to the pressure of liquid dielectric in the energy storage and the rotating speed of the said motor of flow regulating; In addition, in the Forklift working process, the potential energy waste is main energy dissipation part; The waste of braking energy is less relatively, and is just very not obvious in the effect of the situation recover braking energy that reclaims potential energy, so the application does not reclaim braking energy; Since do not need braking energy is reclaimed, thus adopt the common variables motor to get final product, and need not use pump-motor double-acting type motor; Reduced cost, and, accessory can have been exchanged with other motor owing to adopted the common variables motor; Realized that accessory is general, further reduced cost, solved the problem of hydraulic fittings.
In sum, through technical scheme of the present invention, realized the recovery and the utilization of potential energy when door frame descended, the potential energy that is about to reclaim is used to open machine, door frame short range lifting, auxiliary engine walking etc., can save the energy consumption of system effectively, cost-cutting.
Description of drawings
Fig. 1 is the schematic diagram of hydraulic hybrid Forklift according to an embodiment of the invention;
Fig. 2 is the schematic diagram of hydraulic hybrid Forklift in accordance with another embodiment of the present invention.
The specific embodiment
In order more to be expressly understood above-mentioned purpose of the present invention, feature and advantage, the present invention is further described in detail below in conjunction with the accompanying drawing and the specific embodiment.
Set forth a lot of details in the following description so that make much of the present invention, still, the present invention can also adopt other to be different from other modes described here and implement, and therefore, the present invention is not limited to the restriction of following disclosed specific embodiment.
Fig. 1 is the schematic diagram of hydraulic hybrid Forklift according to an embodiment of the invention.
As shown in Figure 1; The invention provides a kind of hydraulic hybrid Forklift; Comprise: elevating ram 6, drive axle 12, first HM Hydraulic Motor 4, second HM Hydraulic Motor 7, first Hydraulic Pump 8, driving engine 1, coupler 3 and energy storage; Wherein, said driving engine 1 takeoff output to said coupler 3, said coupler 3 takeoff outputs drive the said second load driving bridge;
The potential energy that weight produces at work drives said elevating ram 6 and produces the hydraulic pressure ability; Said elevating ram 6 drives said second HM Hydraulic Motor 7; Said second HM Hydraulic Motor 7 drives 8 rotations of said first Hydraulic Pump; The hydraulic pressure that said second Hydraulic Pump 8 produces can be stored in the said energy storage 9, and said energy storage 9 drives said first HM Hydraulic Motor 4, and said first HM Hydraulic Motor, 4 outputting powers drive said coupler 3.
In this technical scheme; Potential energy in the time of can descending to the Forklift door frame carries out recycling; Potential energy when soon descending with first load-elevating ram 6 bonded assembly door frames; Be converted into the hydraulic pressure ability through elevating ram 6, and be converted into the hydraulic pressure ability through second HM Hydraulic Motor 7 and first Hydraulic Pump 8, storage is in the energy storage 9.First HM Hydraulic Motor 4 can be driven with the hydraulic pressure in the energy storage 9 then; And then drive second load-drive axle 12; Thereby the potential energy that door frame descends is able to reclaim and utilize; Avoid in the door frame decline process potential energy to consume in vain and caused energy dissipation, can reduce the expenditure of energy of Forklift, practiced thrift cost.
Preferably, also comprise change speed gear box 2, said change speed gear box 2 is passed to said drive axle 12 with said coupler 3 outputting powers.
In this technical scheme, driving engine 1, change speed gear box 2 and coupler 3 adopt this connection mode, both can satisfy the needs that the present invention reclaimed and utilized door frame potential energy, can realize the different working conditions requirement again.
Preferably, also comprise second Hydraulic Pump 5, wherein, said change speed gear box 3 drives 5 rotations of second Hydraulic Pump, and the hydraulic pressure that said second Hydraulic Pump 5 produces can drive elevating ram 6 lifting weights.
In this technical scheme; Can utilize the driving engine 1 and/or first HM Hydraulic Motor 4 to drive 5 rotations of second Hydraulic Pump, can drive elevating ram 6 work thereby produce hydraulic pressure, therefore; Can further improve the ability of elevating ram lifting weight, satisfy different working condition requirements.
Preferably, said energy storage 9 can also direct drive elevating ram 6 lifting weights.Adopt this technical scheme, in of short duration lifting action, start the engine 1, only adopts that energy stored drives elevating ram in the energy storage, realizes energy-conservationly, can reduce driving engine simultaneously and play the machine number of times, the life-span of prolongation driving engine.
Preferably, also comprise control cock 10, said energy storage 9 drives said first HM Hydraulic Motor 4 and/or drives elevating ram 6 lifting weights through said control cock 10.In this technical scheme, adopt control cock 10 to control as required to the use behind the collection door frame potential energy, make full use of the door frame potential energy of collecting.
Preferably, said second HM Hydraulic Motor 7 is big discharge capacity variable-dis-placement motor, and said first Hydraulic Pump 8 is a float amount controllable capacity pump.In this technical scheme; Adopt the interlock of variable-dis-placement motor 7 and controllable capacity pump 8; When the potential energy when door frame is descended reclaimed, the fluid of the low pressure and mass flow in the time of can door frame being descended converted the fluid of high-pressure low-flow into, is stored in the energy storage 9 thereby door frame potential energy is converted into the high pressure liquid pressure energy; In addition, adopt variable-dis-placement motor 7, can control the descending speed of door frame; Prevent that unexpected generation and hydraulic efficiency pressure system are overheated; Adopt controllable capacity pump 8 to adjust mouth pressure along with the rising of energy storage 9 pressure, what solve energy storage 9 supercharging pressure gradual changes is topic, is convenient to the storage of energy.
Preferably, door frame potential energy recovery system also comprises change-over valve 11, and said change-over valve 11 selectively is connected elevating ram 6 with said second Hydraulic Pump 5, said energy storage 9 or said second HM Hydraulic Motor, 7 oil circuits.In this technical scheme, adopt change-over valve 11 to realize the storage of the work of elevating ram 6, hydraulic pressure ability, control is convenient, can control according to operating mode and needs, and cost is low, is easy to realize.
Further, said change-over valve 11 is two four-way electromagnetic reversing valves.In this technical scheme, two four-way electromagnetic reversing valve controls are flexible, and can realize Long-distance Control and automatic guidance, improve the precision of control and the alerting ability of control.In the present embodiment, the working process of these two four-way electromagnetic reversing valves 11 is: the electromagnet energising, and then two four-way electromagnetic reversing valve 11 left side position work, at this moment, elevating ram 6 is communicated with second HM Hydraulic Motor 7, thereby reclaims the potential energy that door frame descends; When electromagnet stops energising, then two four-way electromagnetic reversing valves, 11 right position work, at this moment; Elevating ram 6 is communicated with second Hydraulic Pump 5, realizes the normal operation of elevating ram 6, in this case; If realize the short range lifting of elevating ram 6; Then need not start the engine 1 and then drive the work that second Hydraulic Pump 5 drives elevating ram 6, and, connect elevating ram 6 and energy storage 9 only through control cock 10; Energy stored drives the of short duration lifting of elevating ram 6, energy savings in the use energy storage 9.
Preferably, between the inlet of variable-dis-placement motor 7 and fuel tank 13, also be provided with by pass valve 14.In this technical scheme, use by pass valve 14, can avoid in the variable-dis-placement motor 7 pressure excessive and produce potential safety hazard effectively, guaranteed the safety of variable-dis-placement motor 7, improved the reliability of system.
Preferably, also be provided with filter 15 in the exit of variable-dis-placement motor 7 and the entrance of controllable capacity pump 8.In this technical scheme, can filtering system in foreign matter in the fluid, the fluid of door frame potential energy recovery system is more cleaned, prolonged the service life of system, reduced the fault of system.
Preferably, preferably said motor 4 also adopts variable-dis-placement motor.The rotating speed that so then can come governor motor 4 according to the pressure and the flow of liquid dielectric in the energy storage satisfies the operating needs of different operating modes; In addition, in the Forklift working process, the potential energy waste is main energy dissipation part; The waste of braking energy is less relatively, and is just very not obvious in the effect of the situation recover braking energy that reclaims potential energy, so the application does not reclaim braking energy; Since do not need braking energy is reclaimed, thus adopt common variables motor 4 to get final product, and need not use pump-motor double-acting type motor; Reduced cost, and, accessory can have been exchanged with other motor owing to adopted common motor; Realized that accessory is general, further reduced cost, solved the problem of hydraulic fittings.
As shown in Figure 1; Driving engine 1, change speed gear box 2, coupler 3 connect successively in the present embodiment; The potential energy that the output shaft of coupler 3 and the drive axle of Forklift 12 mechanical connections, door frame descend adopt the hydraulic pressure recovery system with the stores of high pressure oil in energy storage, high pressure oil CD-ROM drive motor 4 when car load starts; Motor 4 is through 12 walkings of coupler direct drive drive axle, and energy storage 9 can also be used for the lifting of door frame low height.
Specifically the mode of operation of Forklift is following in each operating mode:
Door frame decline potential energy reclaims: with controllable capacity pump 8 series connection, big flow low pressure oil had changed into the low discharge high pressure oil when door frame descended, and was stored in the energy storage 9 in the variable-dis-placement motor 7.Controllable capacity pump 8 is followed energy storage 9 pressure and is changed the automatically regulating discharge capacity, and output torque is constant, and the displacement variation of variable-dis-placement motor 7 is used to regulate the speed that elevating ram 6 descends, and has realized the recovery of potential energy when door frame descended.
Traditional working mode: through 12 walkings of transmission shaft direct drive drive axle, do not reclaim braking energy behind the turbine transformer in the driving engine 1 process change speed gear box 2, the retarder.In the Forklift working process, the potential energy waste is main energy dissipation part, and the waste of braking energy is less relatively, and is just very not obvious in the effect of the situation recover braking energy that reclaims potential energy, so braking energy is not reclaimed in the present embodiment; Owing to do not need braking energy is reclaimed,, and need not use pump-motor double-acting type motor so running gear adopts common motor to get final product; Reduced cost, and, accessory can have been exchanged with other motor owing to adopted common motor; Realized that accessory is general, further reduced cost.
Hydraulic pressure secondary row walking modes: energy storage 9 high pressure oil starter motors 4, after motor 4 driving car loads moved, hydraulic-driven finished, and adopts traditional mechanical fluid power to drive walking.Adopt hydraulic pressure to open machine, saved driving engine and directly opened the high oil consumption that the machine load changing causes, improved energy utilization efficiency.
The hydraulic moving pattern: when reversing, fine motion or short walk, can depend merely on HM Hydraulic Motor 4 and just can drive completion, driving engine is without raising speed or treat the speed acting, thereby reaches energy-saving effect.
The lifting operating mode: when Forklift was got case on container truck, the door frame very little height that only need hoist can adopt high pressure oil in the energy storage 9 to drive elevating ram 6 and get final product this moment, need not to start to pile high driving engine 1, saving in energy.
Fig. 2 is the schematic diagram of hydraulic hybrid Forklift in accordance with another embodiment of the present invention.
As shown in Figure 2, coupler 3 is arranged between driving engine 1 and the change speed gear box 2 in the present embodiment, the output shaft of change speed gear box 2 and the drive axle of Forklift 12 mechanical connections, other structures be connected same as the previously described embodimentsly, repeat no more.Present embodiment, the potential energy in the time of also can reclaiming and utilize door frame to descend is realized goal of the invention of the present invention.
When the hydraulic hybrid Forklift is as shown in Figure 2; That is: coupler 3 is arranged between driving engine 1 and the change speed gear box 2; The output shaft of change speed gear box 2 and the drive axle of Forklift 12 mechanical connections, the concrete situation of the various operating modes of said hydraulic hybrid Forklift is following:
Door frame decline potential energy reclaims: with controllable capacity pump 8 series connection, big flow low pressure oil had changed into the low discharge high pressure oil when door frame descended, and was stored in the energy storage 9 in the variable-dis-placement motor 7.Controllable capacity pump 8 is followed energy storage 9 pressure and is changed the automatically regulating discharge capacity, and output torque is constant, and the displacement variation of variable-dis-placement motor 7 is used to regulate the speed that oil cylinder descends, and has realized the recycling of potential energy when door frame descended.
Traditional working mode: walk through transmission shaft direct drive drive axle 12 behind the turbine transformer in the driving engine 1 process change speed gear box 2, the retarder.In the Forklift working process, the potential energy waste is main energy dissipation part, and the waste of braking energy is less relatively, and is just very not obvious in the effect of the situation recover braking energy that reclaims potential energy, so braking energy is not reclaimed in the present embodiment; Owing to do not need braking energy is reclaimed,, and need not use pump-motor double-acting type motor so running gear adopts common motor to get final product; Reduced cost, and, accessory can have been exchanged with other motor owing to adopted common motor; Realized that accessory is general, further reduced cost.
Hydraulic pressure secondary row walking modes: the high pressure oil starter motor 4 of energy storage 9; Motor 4 is under energy storage 9 high pressure oils drive, and propulsive effort is transferred to drive axle 12 through coupler 3 and change speed gear box 2, makes the car load walking; Hydraulic-driven finishes then, adopts traditional mechanical fluid power to drive walking.Adopt hydraulic pressure to open machine, saved driving engine 1 and directly opened the high oil consumption that the machine load changing causes, improved energy utilization efficiency.
During the door frame lifting: driving engine 1 drives working barrel 5 work on the change speed gear box 2, and energy storage also can drive motor 4 work simultaneously, and the power of motor 4 passes on the driving engine 1, helps driving engine 1 work, and the load that alleviates driving engine 1 reaches energy-saving effect.
When the Forklift walking needed moment of torsion big: motor 4 was exerted oneself with driving engine 1 simultaneously, realizes collaborative work, and actv. utilizes the energy of energy storage 9.
In sum, through technical scheme of the present invention, realized the recycling of potential energy when door frame descended; The potential energy that reclaims is used to open machine, door frame short range lifting, auxiliary engine walking etc.; Can save the energy consumption of system effectively, solve the problem of hydraulic fittings simultaneously, cost-cutting.
The above is merely the preferred embodiments of the present invention, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.All within spirit of the present invention and principle, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. hydraulic hybrid Forklift; It is characterized in that; Comprise: elevating ram (6), drive axle (12), first HM Hydraulic Motor (4), second HM Hydraulic Motor (7), first Hydraulic Pump (8), driving engine (1), coupler (3) and energy storage (9); Wherein, said driving engine (1) takeoff output to said coupler (3), said coupler (3) takeoff output drives said drive axle (12);
The potential energy that weight produces at work drives said elevating ram (6) and produces the hydraulic pressure ability; Said hydraulic pressure can drive said second HM Hydraulic Motor (7); Said second HM Hydraulic Motor (7) drives said first Hydraulic Pump (8) rotation; The hydraulic pressure that said second Hydraulic Pump (8) produces can be stored in the said energy storage (9), and said energy storage (9) drives said first HM Hydraulic Motor (4), and said first HM Hydraulic Motor (4) outputting power drives said coupler (3).
2. hydraulic hybrid Forklift according to claim 1 is characterized in that, also comprises change speed gear box (2), and said change speed gear box (2) is passed to said coupler (3) with said driving engine (1) outputting power.
3. hydraulic hybrid Forklift according to claim 1 is characterized in that, also comprises change speed gear box (2), and said change speed gear box (2) is passed to said drive axle (12) with said coupler (3) outputting power.
4. according to claim 2 or 3 described hydraulic hybrid Forklifts; It is characterized in that, also comprise second Hydraulic Pump (5), wherein; Said change speed gear box (2) drives said second Hydraulic Pump (5) rotation, and the hydraulic pressure that said second Hydraulic Pump (5) produces can drive said elevating ram (6) lifting weight.
5. hydraulic hybrid Forklift according to claim 4 is characterized in that, said energy storage (9) can also drive said elevating ram (6) lifting weight.
6. hydraulic hybrid Forklift according to claim 5; It is characterized in that; Also comprise control cock (10), said energy storage (9) drives said first HM Hydraulic Motor (4) through said control cock (10) and rotates and/or drive said elevating ram (6) lifting weight.
7. hydraulic hybrid Forklift according to claim 4 is characterized in that, said second HM Hydraulic Motor (7) is big discharge capacity variable-dis-placement motor, and said first Hydraulic Pump (8) is a float amount controllable capacity pump.
8. hydraulic hybrid Forklift according to claim 4; It is characterized in that; Also comprise change-over valve (11), said change-over valve (11) selectively is connected said elevating ram (6) with said second Hydraulic Pump (5), said energy storage (9) or said second HM Hydraulic Motor (7).
9. hydraulic hybrid Forklift according to claim 8 is characterized in that, said change-over valve (11) is two four-way electromagnetic reversing valves.
10. hydraulic hybrid Forklift according to claim 4; It is characterized in that; Between the inlet of said second HM Hydraulic Motor (7) and fuel tank (13), also be provided with by pass valve (14); Also be provided with filter (15) in the exit of said second HM Hydraulic Motor (7) and the entrance of said first Hydraulic Pump (8), said first HM Hydraulic Motor (4) is a variable-dis-placement motor.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105197840A (en) * | 2015-04-16 | 2015-12-30 | 上海市闸北区物流工程技术研究所 | Electric control hydraulic driving system for industrial vehicle |
| CN105236317A (en) * | 2015-11-12 | 2016-01-13 | 潍柴动力股份有限公司 | Electric fork-lift truck, potential energy recycling system and method thereof |
| CN105621322A (en) * | 2016-02-24 | 2016-06-01 | 上海市闸北区物流工程技术研究所 | Full-hydraulic electric stacking forklift |
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| CN102134048A (en) * | 2011-02-15 | 2011-07-27 | 安徽合力股份有限公司 | Hydraulic system of hybrid power forklift |
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| CN105197840A (en) * | 2015-04-16 | 2015-12-30 | 上海市闸北区物流工程技术研究所 | Electric control hydraulic driving system for industrial vehicle |
| CN105197840B (en) * | 2015-04-16 | 2018-11-20 | 上海市闸北区物流工程技术研究所 | A kind of Electro-hydraulic drive system for industrial vehicle |
| CN105236317A (en) * | 2015-11-12 | 2016-01-13 | 潍柴动力股份有限公司 | Electric fork-lift truck, potential energy recycling system and method thereof |
| CN105621322A (en) * | 2016-02-24 | 2016-06-01 | 上海市闸北区物流工程技术研究所 | Full-hydraulic electric stacking forklift |
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