CN202575879U - Hydraulically-driven hybrid power forklift truck - Google Patents
Hydraulically-driven hybrid power forklift truck Download PDFInfo
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- CN202575879U CN202575879U CN 201220114753 CN201220114753U CN202575879U CN 202575879 U CN202575879 U CN 202575879U CN 201220114753 CN201220114753 CN 201220114753 CN 201220114753 U CN201220114753 U CN 201220114753U CN 202575879 U CN202575879 U CN 202575879U
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- hydraulic motor
- hydraulic pump
- motor
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Abstract
The utility model provides a hydraulically-driven hybrid power forklift truck which comprises a lift oil cylinder, a drive axle, an engine, a first hydraulic pump, a first hydraulic motor, a clutch, a second hydraulic motor, a second hydraulic pump and an energy accumulator; the engine drives the first hydraulic pump which drives the first hydraulic motor and the lift oil cylinder, and the shaft of the first hydraulic motor is mechanically connected with the clutch which transfers the power of the first hydraulic motor to the drive axle; and the potential energy which is generated by the lift oil cylinder during the operation drives the second hydraulic motor, the second hydraulic motor drives the second hydraulic pump to rotate, the hydraulic energy which is generated by the second hydraulic pump is stored in the energy accumulator, and the energy accumulator can drive the first hydraulic motor. With the hydraulically-driven hybrid power forklift truck, the potential energy of a gantry can be recycled, the recycled potential energy can be used for starting the truck, lifting the gantry for a short distance, auxiliary travelling and the like, the energy consumption can be effectively saved, and the cost is lowered; and moreover, the jogging performance requirement of the operation of the forklift truck is satisfied, and the hydraulic accessory problem is solved.
Description
Technical field
The utility model relates to a kind of Forklift, in particular to a kind of hybrid power Forklift of full hydraulic drive.
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.Most of potential energy consumes in vain in the suspender decline process, does not recycle, and energy dissipation is serious.In the job engineering, car load starts frequent, causes engine efficiency low, and the oil consumption of going is higher.
So mainly there is following problem in the Forklift of traditional full hydraulic drive:
1. do not have door frame potential energy recovery system, and the hydraulic efficiency pressure system driving efficiency is low, heating is serious, and energy dissipation is bigger, and full hydraulic drive is more energy-conservation in theory, but present design, control, manufacture level also are difficult to reach;
2. fretting performance is bad, the fine motion property that Forklift is had relatively high expectations during to case, and fluid motor-driven, glancing impact has impact;
3. when car load starts the time-delay phenomenon is arranged, the swash plate angle variation of pump needs the regular hour, has influenced operating efficiency.
In addition, 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. the traveling vehicle glancing impact is 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, the defective to existing correlation technique has the following technical issues that need to address:
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 descending speed is different according to different working conditions speed, requires controlled;
4. car load fine motion property problem;
5. the hydraulic pressure ability what use is made of after reclaiming;
6. hydraulic fittings problem.
The utility model content
For one of solving the problems of the technologies described above at least, the utility model provides a kind of hydraulically powered hybrid power Forklift.
The hydraulically powered hybrid power Forklift that the utility model provides comprises elevating ram, drive axle, driving engine, first Hydraulic Pump, first HM Hydraulic Motor, power-transfer clutch, second HM Hydraulic Motor, second Hydraulic Pump and energy storage; Said first Hydraulic Pump of said engine drive; Said first HM Hydraulic Motor of said first hydraulic pump drive and said elevating ram; The axle of said first HM Hydraulic Motor links to each other with said power-transfer clutch, and said power-transfer clutch is with transmission of power to the said drive axle of said first HM Hydraulic Motor; The potential energy that weight produces at work drives said elevating ram and produces the hydraulic pressure ability; Said hydraulic pressure can drive said second HM Hydraulic Motor; Said second 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 can drive said first HM Hydraulic Motor rotation.
In this technical scheme, the potential energy in the time of can descending to door frame carries out recycling, has avoided in the door frame decline process potential energy to consume in vain and causes waste, can reduce the expenditure of energy of Forklift, practices thrift cost; And adopted power-transfer clutch, and the glancing impact throw-out-of clutch, first HM Hydraulic Motor and the first hydraulic pressure capacity of pump do not need set to zero, make the fretting performance of car load better.
Preferably, said second HM Hydraulic Motor is big discharge capacity variable-dis-placement motor, and said second Hydraulic Pump is a float amount controllable capacity pump; Said first HM Hydraulic Motor is a variable-dis-placement motor, and said first Hydraulic Pump is a controllable capacity pump.
In this technical scheme; Adopt the interlock of second HM Hydraulic Motor and second Hydraulic Pump; When the potential energy when door frame is descended reclaims; The fluid of the low pressure and mass flow in the time of can door frame being descended converts 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 second HM Hydraulic Motor, can control the descending speed of door frame, prevent that unexpected generation and hydraulic efficiency pressure system are overheated, adopt second Hydraulic Pump can adjust mouth pressure, solve the problem of pressure gradual change in the energy storage along with the rising of energy storage pressure; And adopted power-transfer clutch, and the glancing impact throw-out-of clutch, the swash plate of first variable-dis-placement motor and first controllable capacity pump does not need set to zero, just can make the fretting performance of car load better; 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 braking energy is not reclaimed among the application; Owing to do not need braking energy is reclaimed,, and need not use pump-motor double-acting type motor so running gear adopts common HM Hydraulic 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, solved the problem of hydraulic fittings.
Preferably, said energy storage also can drive said elevating ram lifting weight.In this technical scheme, can be in of short duration lifting action, start the engine does not only adopt the energy storage energy stored to drive elevating ram.
Preferably, also comprise control cock, said energy storage drives said first HM Hydraulic Motor rotation 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 of collecting behind the door frame potential energy, make full use of the door frame potential energy after the collection.
Preferably, also comprise change-over valve, said change-over valve selectively is connected said elevating ram with said first Hydraulic Pump, said energy storage or said second HM Hydraulic Motor.In this technical scheme, adopt the work of change-over valve control elevating ram, the storage of potential energy, 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, two four-way electromagnetic reversing valve controls are flexible, and 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.In this technical scheme, use by pass valve, can avoid in second HM Hydraulic Motor pressure excessive and produce potential safety hazard effectively, guaranteed the safety of second HM Hydraulic Motor, improved the reliability of system.
Preferably, also be provided with filter in the exit of said second HM Hydraulic Motor and the entrance of said second Hydraulic Pump.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, between said power-transfer clutch and said drive axle, also be provided with retarder.In this technical scheme, adopt retarder, can control the speed of Forklift well.
In sum; Through the technical scheme of the utility model, 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; Cost-cutting satisfies the fine motion property requirement of Forklift work simultaneously, and has solved the problem of hydraulic fittings.
Description of drawings
Fig. 1 is the schematic diagram according to the hydraulically powered hybrid power Forklift of an embodiment of the utility model.
The specific embodiment
In order more to be expressly understood above-mentioned purpose, the feature and advantage of the utility model, the utility model is further described in detail below in conjunction with the accompanying drawing and the specific embodiment.
A lot of details have been set forth in the following description so that make much of the utility model; But; The utility model can also adopt other to be different from other modes described here and implement, and therefore, the utility model is not limited to the restriction of following disclosed specific embodiment.
Fig. 1 is the schematic diagram according to the hydraulically powered hybrid power Forklift of an embodiment of the utility model, among the figure, and the direction of the direction indication flow of the other arrow of pipeline.。
As shown in Figure 1; The utility model provides a kind of hydraulically powered hybrid power Forklift, comprises elevating ram 6, drive axle 12, driving engine 1, first Hydraulic Pump 2, first HM Hydraulic Motor 3, power-transfer clutch 4, second HM Hydraulic Motor 7, second Hydraulic Pump 8 and energy storage 9; Said driving engine 1 drives said first Hydraulic Pump 2; Said first Hydraulic Pump 2 drives said first HM Hydraulic Motor 3 and said elevating ram 6; The axle of said first HM Hydraulic Motor 3 links to each other with said power-transfer clutch 4, and said power-transfer clutch 4 is with transmission of power to the said drive axle 12 of said first HM Hydraulic Motor 3; 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 8 rotations of said second 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 can drive 3 rotations of said first HM Hydraulic Motor.
In this technical scheme, the potential energy in the time of can descending to door frame carries out recycling, has avoided in the door frame decline process potential energy to consume in vain and causes waste, can reduce the expenditure of energy of Forklift, practices thrift cost; And adopted power-transfer clutch 4, and glancing impact power-transfer clutch 4 is thrown off, and first HM Hydraulic Motor and the first hydraulic pressure capacity of pump do not need set to zero, just can make the fretting performance of car load better.
Preferably, said second HM Hydraulic Motor 7 is big discharge capacity variable-dis-placement motor, and said second Hydraulic Pump 8 is a float amount controllable capacity pump; Said first HM Hydraulic Motor 3 is a variable-dis-placement motor, and said first Hydraulic Pump 2 is a controllable capacity pump.
In this technical scheme; Adopt the interlock of second Hydraulic Pump 8 of second HM Hydraulic Motor 7 and the little discharge capacity of big discharge capacity; The hydraulic efficiency pressure system of second HM Hydraulic Motor 7 of big discharge capacity is mainly used in regulates the door frame descending speed; The supercharging pressure that second Hydraulic Pump 8 of little discharge capacity is mainly used in balance energy storage 9 changes; 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 second HM Hydraulic Motor 7, can control the descending speed of door frame; Prevent that unexpected generation and hydraulic efficiency pressure system are overheated; Adopt second Hydraulic Pump 8 to adjust mouth pressure, solve the problem of pressure gradual change in the energy storage 9, be convenient to the storage of energy along with the rising of energy storage 9 pressure; And adopted power-transfer clutch 4, and glancing impact power-transfer clutch 4 is thrown off, and the swash plate of first HM Hydraulic Motor 3 and first Hydraulic Pump 2 does not need set to zero, can not occur time-delay when car load starts once more, just can make the fretting performance of car load better; In addition, in the Forklift working process, the waste of door frame potential energy 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 braking energy is not reclaimed among the application; Owing to do not need braking energy is reclaimed,, and need not use pump-motor double-acting type motor so present embodiment adopts common motor to get final product; Thereby 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.
Preferably, said energy storage 9 also can drive elevating ram 6 lifting weights.
In this technical scheme, can be in of short duration lifting action, start the engine 1, only adopts in the energy storage 9 energy stored to come the said elevating ram 6 of lifting.
Preferably, also comprise control cock 10, said energy storage 9 drives 3 rotations of said first HM Hydraulic Motor and/or drives said 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 of collecting behind the door frame potential energy, make full use of the door frame potential energy after the collection.
Preferably, also comprise change-over valve 11, said change-over valve 11 selectively is connected elevating ram 6 with said first Hydraulic Pump 2, said energy storage 9 or said second HM Hydraulic Motor 7.
In this technical scheme, adopt the up-down of change-over valve 11 control elevating rams 6 and the storage of potential energy, control is convenient, can control according to operating mode and needs, and cost is low, is easy to realize.
Preferably, 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 alerting ability of control accuracy and 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 first Hydraulic Pump 2, realizes the normal operation of elevating ram, 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 first Hydraulic Pump 2 drives elevating ram 6, and only through control cock 10; Connect elevating ram 6 and energy storage 9, 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 second HM Hydraulic 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 second HM Hydraulic Motor 7 pressure excessive and produce potential safety hazard effectively, guaranteed the safety of second HM Hydraulic Motor 7, improved the reliability of system.
Preferably, also be provided with filter 15 in the exit of second HM Hydraulic Motor 7 and the entrance of second Hydraulic 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, between power-transfer clutch 4 and drive axle 12, also be provided with retarder 5.
In this technical scheme, adopt retarder 5, can control the speed of the drive axle 12 of Forklift well, thus the speed of control Forklift.
According to technique scheme; The potential energy that door frame descends adopt the hydraulic pressure recovery system with the stores of high pressure oil in energy storage 9; High pressure oil drove first motor, 3, the first motors 3 and drives said drive axle 12 through power-transfer clutch when car load started, in addition; Energy storage 9 can also be used for the lifting of door frame low height, thereby saves the energy.
In the present embodiment, specifically the mode of operation of Forklift is following in each operating mode:
Door frame decline potential energy reclaims: second HM Hydraulic Motor 7 and 8 series connection of second Hydraulic Pump, 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.Second Hydraulic Pump 8 is followed energy storage 9 pressure and is changed the automatically regulating discharge capacity, and the displacement variation of second HM Hydraulic Motor 7 then is used to regulate the speed that oil cylinder descends.
Normal walking operating mode: driving engine 1 drives first Hydraulic Pump 2 and gives first HM Hydraulic Motor, 3 fuel feeding; Glancing impact is holdback clutch 4 at first; The swash plate of first Hydraulic Pump 2, first HM Hydraulic Motor 3 can be reserved certain angle; Need not be transferred to minimum, can not occur time-delay when car load starts once more yet, make the fretting performance of car load better.
Assist and open the machine operating mode: drive first HM Hydraulic Motor 3 with the high pressure oil in the energy storage 9, after car load moved, driving engine 1 did work again.Because the Forklift start and stop are frequent, adopt hydraulic pressure to open machine, avoid driving engine 1 frequent raising speed, thereby reach energy-saving effect.
Energy storage lifting operating mode: the high pressure oil in the energy storage 9 gets into elevating ram 6 through control cock 10 backs, realizes the short range lifting.
In sum; Through the technical scheme of the utility model, 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; Cost-cutting satisfies the fine motion property requirement of Forklift work simultaneously, and has solved the problem of hydraulic fittings.
The preferred embodiment that the above is merely the utility model is not limited to the utility model, and for a person skilled in the art, the utility model can have various changes and variation.All within the spirit and principle of the utility model, any modification of being done, be equal to replacement, improvement etc., all should be included within the protection domain of the utility model.
Claims (9)
1. a hydraulically powered hybrid power Forklift is characterized in that, comprising:
Elevating ram (6), drive axle (12), driving engine (1), first Hydraulic Pump (2), first HM Hydraulic Motor (3), power-transfer clutch (4), second HM Hydraulic Motor (7), second Hydraulic Pump (8) and energy storage (9);
Said driving engine (1) drives said first Hydraulic Pump (2); Said first Hydraulic Pump (2) drives said first HM Hydraulic Motor (3) and said elevating ram (6); The axle of said first HM Hydraulic Motor (3) links to each other with said power-transfer clutch (4), and said power-transfer clutch (4) is with transmission of power to the said drive axle (12) of said first HM Hydraulic Motor (3);
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 second 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) can drive said first HM Hydraulic Motor (3) rotation.
2. hydraulically powered hybrid power Forklift according to claim 1 is characterized in that,
Said second HM Hydraulic Motor (7) is big discharge capacity variable-dis-placement motor, and said second Hydraulic Pump (8) is a float amount controllable capacity pump;
Said first HM Hydraulic Motor (3) is a variable-dis-placement motor, and said first Hydraulic Pump (2) is a controllable capacity pump.
3. hydraulically powered hybrid power Forklift according to claim 2 is characterized in that,
Said energy storage (9) can also drive said elevating ram (6) lifting weight.
4. hydraulically powered hybrid power Forklift according to claim 3 is characterized in that,
Also comprise control cock (10), said energy storage (9) drives said first HM Hydraulic Motor (3) through said control cock (10) and rotates and/or drive said elevating ram (6) lifting weight.
5. hydraulically powered hybrid power Forklift according to claim 3 is characterized in that,
Also comprise change-over valve (11), said change-over valve (11) selectively is connected said elevating ram (6) with said first Hydraulic Pump (2), said energy storage (9) or said second HM Hydraulic Motor (7).
6. hydraulically powered hybrid power Forklift according to claim 5 is characterized in that,
The said change-over valve (11) of stating is two four-way electromagnetic reversing valves.
7. hydraulically powered hybrid power Forklift according to claim 6 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).
8. hydraulically powered hybrid power Forklift according to claim 7 is characterized in that,
Also be provided with filter (15) in the exit of said second HM Hydraulic Motor (7) and the entrance of said second Hydraulic Pump (8).
9. according to the arbitrary described hydraulically powered hybrid power Forklift of claim 1 to 8, it is characterized in that,
Between said power-transfer clutch (4) and said drive axle (12), also be provided with retarder (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220114753 CN202575879U (en) | 2012-03-23 | 2012-03-23 | Hydraulically-driven hybrid power forklift truck |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220114753 CN202575879U (en) | 2012-03-23 | 2012-03-23 | Hydraulically-driven hybrid power forklift truck |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202575879U true CN202575879U (en) | 2012-12-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220114753 Expired - Lifetime CN202575879U (en) | 2012-03-23 | 2012-03-23 | Hydraulically-driven hybrid power forklift truck |
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| Country | Link |
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| CN (1) | CN202575879U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104088828A (en) * | 2014-07-08 | 2014-10-08 | 安徽合力股份有限公司 | Hydraulic system of hanger of stacking machine |
| CN108756359A (en) * | 2018-05-25 | 2018-11-06 | 太原理工大学 | A kind of Household hydraulic stereo garage |
-
2012
- 2012-03-23 CN CN 201220114753 patent/CN202575879U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104088828A (en) * | 2014-07-08 | 2014-10-08 | 安徽合力股份有限公司 | Hydraulic system of hanger of stacking machine |
| CN104088828B (en) * | 2014-07-08 | 2016-03-23 | 安徽合力股份有限公司 | A kind of hydraulic system of fork lift truck suspender |
| CN108756359A (en) * | 2018-05-25 | 2018-11-06 | 太原理工大学 | A kind of Household hydraulic stereo garage |
| CN108756359B (en) * | 2018-05-25 | 2020-06-02 | 太原理工大学 | Domestic hydraulic stereo garage |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: HUNAN SANYI PORT EQUIPMENT CO., LTD. Free format text: FORMER OWNER: KM GROUP CO., LTD. Effective date: 20150610 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20150610 Address after: 410100 Changsha economic and Technological Development Zone, Hunan City, the 31 industrial city Patentee after: Hunan 31 harbour facilities Co., Ltd Address before: 410100 Changsha economic and Technological Development Zone, Hunan City, the 31 industrial city Patentee before: KM Group Co., Ltd. |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20121205 |