CN201962039U - Energy-saving hydraulic system of electronic forklift - Google Patents
Energy-saving hydraulic system of electronic forklift Download PDFInfo
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- CN201962039U CN201962039U CN2011200381772U CN201120038177U CN201962039U CN 201962039 U CN201962039 U CN 201962039U CN 2011200381772 U CN2011200381772 U CN 2011200381772U CN 201120038177 U CN201120038177 U CN 201120038177U CN 201962039 U CN201962039 U CN 201962039U
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Abstract
The utility model relates to an energy-saving hydraulic system of an electronic forklift. The energy-saving hydraulic system comprises a one-way valve, a motor, a multiway valve and the like, wherein the multiway valve is a sheet valve, and comprises an oil inlet/return valve sheet, a lifting reversing valve sheet, an intermediate connection valve sheet, an inclined reversing valve sheet and an oil inlet valve sheet; the one-way valve and a main safety valve are arranged in the oil inlet/return valve sheet; the oil inlet/return valve sheet is circumscribed with an oil port P1 and an oil return port T1; the lifting reversing valve sheet is a three-position six-way reversing valve sheet, in which a middle oil channel, a right oil channel and a left oil channel are arranged; the lifting reversing valve sheet is circumscribed with oil ports A1, Pt and T2; the intermediate connection valve sheet adopts a transitional connection valve, in which a three-way pipe is arranged; the inclined reversing valve sheet adopts another three-position six-way reversing valve sheet, in which the middle oil channel is arranged; the inclined reversing valve sheet is circumscribed with oil ports A2 and B2; an inclined overflow valve, a reversing overflow valve and a priority valve are arranged in the oil inlet valve sheet; and the oil inlet valve sheet is circumscribed with oil ports P2, CF and Ls. Through the adoption of the electronic forklift to charge at one time, the potential energy recovery efficiency can reach 59.7%, the total system recovery efficiency can be up to 31.3%, and the operation time of the electronic forklift can be prolonged by 20%.
Description
Technical field
The utility model belongs to the electri forklift technical field, is specifically related to the hydraulic efficiency pressure system of electrical motor fork truck.
Background technology
Fork truck by tackling system finish to the holder of goods get, operation such as lifting, piling.Getting in the goods decline process when the fork truck fork, is the descending speed of controlling tackling system by flow regulating valve.Common fork truck does not have energy recycle device usually, and the potential energy that discharges in the tackling system decline process is most of to be consumed on flow regulating valve, and potential energy is converted into the heat energy of hydraulic efficiency pressure system, thereby causes the fluid temperature rise, influences the reliability of Hydraulic Elements and the work efficiency of car load.In addition, what common fork truck hydrostatic steering system adopted is the constant-current type part flow system, and consumption of power is big, the hydraulic oil temperature height.Domestic electri forklift is because be subjected to the restriction of capacity of lead acid battery, and the production of large-tonnage rank batter fork lift truck is restricted, and solves these problems so be necessary to design novel hydraulic system.
Summary of the invention
At the problems referred to above,, reach the effect that reduces loss in efficiency, energy savings in order to realize reclaiming and replace the constant-current type steering swivel system with the preferential steering swivel system of load sensing with fork truck tackling system potential energy; The utility model provides a kind of electri forklift energy-saving hydraulic system.
The technical solution that realizes above-mentioned purpose is as follows:
A kind of electri forklift energy-saving hydraulic system, comprise check valve 1, motor 2, oil pump 3, multiway valve 4, lift oil tank 13, dump ram 14, turn to interconnective pipeline between oil cylinder 15, load sensing deflector 16, double-united oil pump 19, pilot sequencing valve 20, flow regulating valve 21, oil filter 18, fuel tank 22 and each parts, described multiway valve 4 is the chip multiway valve, comprise oil inlet and oil return valve block 5, lifting Reversing valve plate 6, middle valve block 7, inclination Reversing valve plate 8 and the oil-feed valve block 9 of connecting, attach together together by the screw bolt and nut connection between each sheet.
The oil outlet of oil pump 3 is communicated with P1 mouth on the oil inlet and oil return valve block 5, be provided with oil inlet and oil return check valve 51 in the oil inlet and oil return valve block 5, the outlet of oil inlet and oil return check valve 51 is divided into two-way, one the tunnel is being communicated with the import of lifting Reversing valve plate 6, middle bit port 61 by lifting Reversing valve plate 6 communicates with middle first mouth of pipe that is connected the three-way pipe in the valve block 7, second mouth of pipe by three-way pipe is communicated with oil return inlet T 1 by pipeline again, and oil return inlet T 1 is communicated with fuel tank 22 by oil filter 18; Another road is communicated with the import of main safety valve 52, and the outlet of main safety valve 52 is communicated with oil return inlet T 1; The oil outlet A1 of lifting Reversing valve plate 6 is communicated with first interface of three-way pipe 11, and second interface of three-way pipe 11 is communicated with lift oil tank 13 by pipeline 12, and the 3rd interface of three-way pipe 11 is communicated with the control d mouth of pilot sequencing valve 20; The Pt mouth of lifting Reversing valve plate 6 is being communicated with a mouth of pilot sequencing valve 20; The delivery port of double-united oil pump 19 is being communicated with the P2 mouth of oil-feed valve block 9, and the P2 mouth of oil-feed valve block 9 is divided into two-way by three-way pipe, and one the tunnel is being communicated with the import of by pass valve 91, and the outlet of by pass valve 91 is being communicated with oil return inlet T 1 by ring shaped oil passage 17; Another road is being communicated with pressure-gradient control valve 93, pressure-gradient control valve 93 is communicated with the LS of load sensing deflector 16 by LS signal oil circuit, the CF mouth of pressure-gradient control valve 93 is communicated with the P mouth of load sensing deflector 16, the EF mouth of pressure-gradient control valve 93 is communicated with the oil inlet of inclination Reversing valve plate 8, join with middle the 3rd mouthful of being connected the interior three-way pipe of valve block 7 by the meta oil duct 81 in it, second mouthful of three-way pipe is communicated with oil return inlet T 1; The oil outlet A2 of inclination Reversing valve plate 8 and oil outlet B2 are communicated with the rodless cavity and the rod chamber of dump ram 14 respectively; Be provided with draining road T2 in the lifting change-over valve in the sheet 6, draining road T2 is being communicated with fuel tank 22.
Described pilot sequencing valve 20 is the two-bit triplet pilot operated valve device, and its a mouth links to each other with the Pt mouth of lifting Reversing valve plate 6, and its b mouth is communicated with the oil inlet of oil pump 3, and its c mouth communicates with fuel tank 22 by flow regulating valve, and its hydraulic control d mouth is communicated with three-way pipe 11.
Be provided with a main safety valve 52 in the oil inlet and oil return valve block 5 of described multiway valve 4, to limit the maximum working pressure of oil pump 3; Described oil-feed valve block 9 is built-in with by pass valve 91 and turns to by pass valve 92, and by pass valve 91 plays level pressure overflow effect in the hydraulic efficiency pressure system of hybrid power forklift; Turn to an end of by pass valve 92 to communicate with LS signal oil circuit, the other end is communicated with oil return inlet T 1 by ring shaped oil passage 17.
The utility model is compared the advantage with following several respects with prior art products:
Prove by experiment that 1, adopt the batter fork lift truck of this technology once to charge, the potential energy organic efficiency can reach 59.7%, the system recoveries net effciency can reach 31.3%, and the batter fork lift truck work-hours can prolong 1/5;
2, hoist and the generating two states that descends, motor rotation direction unanimity makes electrical equipment control simple and convenient reliable;
3, hoist and descend the generating all realize that by manual control multiway valve lifting valve rod do not need to increase control element, simple to operation, cost is low;
4, the most of control element in the utility model system all is integrated in the multiway valve, the integrated degree height of system element, and circuit design and layout are simple and convenient, and cost is low;
5, adopt the preferential steering swivel system of load sensing type, make steering flow become controlled variable, loss in efficiency is little, the system effectiveness height.
Description of drawings
Fig. 1 is the utility model electri forklift energy-saving hydraulic systematic schematic diagram.
Fig. 2 is a multiway valve structural front view among Fig. 1.
Fig. 3 is a multiway valve schematic diagram among Fig. 1.
Fig. 4 is that the A of Fig. 2 is to view.
Fig. 5 is that the B of Fig. 2 is to view.
Among the last figure: 1 check valve, 2 motors, 3 oil pumps, 4 multiway valve, 5 oil inlet and oil return valve blocks, 51 oil inlet and oil return check valves, 52 main safety valves, 6 lifting Reversing valve plates, bit port in 61,62 a right oil duct, 63 left side oil duct, 7 middle valve block, the 8 inclination Reversing valve plates of connecting, 81 meta oil ducts, 9 oil-feed valve blocks, 91 inclination by pass valves, 92 turn to by pass valve, 93 pressure-gradient control valves, 10 pressure control oil circuits, 11 three-way pipes, 12 pipelines, 13 lift oil tanks, 14 dump rams, 15 turn to oil cylinder, 16 load sensing deflectors, 17 ring shaped oil passages, 18 oil filters, 19 double-united oil pumps, 20 pilot sequencing valves, 21 flow regulating valve, 22 fuel tanks.
The specific embodiment
Below in conjunction with accompanying drawing, the utility model is further described by embodiment.
Embodiment:
Referring to Fig. 1, a kind of electri forklift energy-saving hydraulic system comprises check valve 1, motor 2, oil pump 3, multiway valve 4, lift oil tank 13, dump ram 14, turns to interconnective pipeline between oil cylinder 15, load sensing deflector 16, double-united oil pump 19, pilot sequencing valve 20, flow regulating valve 21, oil filter 18, fuel tank 22 and each parts.
Described multiway valve 4 is the chip multiway valve, comprises oil inlet and oil return valve block 5, lifting Reversing valve plate 6, middle valve block 7, inclination Reversing valve plate 8 and the oil-feed valve block 9 of connecting, and attaches together together by the screw bolt and nut connection between each sheet;
Be provided with oil inlet and oil return check valve 51 and main safety valve 52 in the oil inlet and oil return valve block 5 of described multiway valve, outer oil-collecting hole has P1 and oil return inlet T 1; Described lifting Reversing valve plate 6 is three six-way transfer valve sheets, bit port 61, right position oil duct 62, position, left side oil duct 63 in being built-in with, and outer oil-collecting hole has A1, Pt and T2; Connecting valve block 7 in the middle of described is that a transition connects valve block, is built-in with three-way pipe; Described inclination Reversing valve plate 8 is three six-way transfer valve sheets, is built-in with the meta oil duct of narrating in the literary composition 81, and outer oil-collecting hole has A2 and B2.Described oil-feed valve block 9 is built-in with inclination by pass valve 91, turns to by pass valve 92 and pressure-gradient control valve 93, and outer oil-collecting hole has P2, CF and Ls mouth.
The oil outlet of oil pump 3 is communicated with P1 mouth on the oil inlet and oil return valve block 5, be provided with oil inlet and oil return check valve 51 in the oil inlet and oil return valve block 5, the outlet of oil inlet and oil return check valve 51 is divided into two-way, one the tunnel is being communicated with the import of lifting Reversing valve plate 6, middle bit port 61 by lifting Reversing valve plate 6 communicates with middle first mouth of pipe that is connected the three-way pipe in the valve block 7, second mouth of pipe by three-way pipe is communicated with oil return inlet T 1 again, and oil return inlet T 1 is communicated with fuel tank 22 by oil filter 18; Another road is communicated with the import of main safety valve 52, and the outlet of main safety valve 52 is communicated with oil return inlet T 1; The oil outlet A1 of lifting Reversing valve plate 6 is communicated with first interface of three-way pipe 11, and second interface of three-way pipe 11 is communicated with lift oil tank 13 by pipeline 12, and the 3rd interface of three-way pipe 11 is communicated with the control d mouth of pilot sequencing valve 20; The Pt mouth of lifting Reversing valve plate 6 is being communicated with a mouth of pilot sequencing valve 20; The delivery port of double-united oil pump 19 is being communicated with the P2 mouth of oil-feed valve block 9, and the P2 mouth of oil-feed valve block 9 is divided into two-way by three-way pipe, and one the tunnel is being communicated with the import of inclination oil circuit by pass valve 91, and the outlet of by pass valve 91 is being communicated with oil return inlet T 1 by ring shaped oil passage 17; Another road is being communicated with pressure-gradient control valve 93, pressure-gradient control valve 93 is communicated with load sensing deflector LS by LS signal oil circuit, the CF mouth of pressure-gradient control valve 93 is communicated with the P mouth of load sensing deflector, the EF mouth of pressure-gradient control valve 93 is communicated with the oil inlet of inclination Reversing valve plate 8, join with middle the 3rd mouth of pipe that is connected the three-way pipe of 7 li of valve blocks by its meta oil duct 81, second mouth of pipe by three-way pipe is communicated with oil return inlet T 1 again; The oil outlet A2 of inclination Reversing valve plate 8 and oil outlet B2 are communicated with the rodless cavity and the rod chamber of dump ram 14 respectively; Be provided with draining road T2 in the lifting change-over valve in the sheet 6, draining road T2 is being communicated with fuel tank 22.
Described pilot sequencing valve 20 is the two-bit triplet pilot operated valve device, and its a mouth links to each other with the Pt mouth of lifting Reversing valve plate 6, and its b mouth is communicated with the oil inlet of oil pump 3, and its c mouth communicates with hydraulic reservoir 22 by flow regulating valve, and its hydraulic control d mouth is communicated with three-way pipe 11; Described pilot sequencing valve about 20 minutes two, when the state of position, a left side, a mouth communicates with the c mouth; When the state of right position, a mouth communicates with the b mouth.
Described multiway valve 4 is provided with a main safety valve 52 in oil inlet and oil return valve block 5, to limit the maximum working pressure of oil pump 3; Be provided with inclination oil circuit by pass valve 91 in the described oil-feed valve block 9 and turn to by pass valve 92, by pass valve 91 limits the maximum working pressure of oil pump 19; Turn to an end of by pass valve 92 to communicate with LS signal oil circuit, the other end is communicated with oil return inlet T 1 by ring shaped oil passage 17.
Principle of work of the present utility model is as follows:
When the door frame of fork truck only hoists, oil pump 3 is by check valve 1 oil suction from fuel tank 22, by the P1 mouth of multiway valve 4, enter lift oil tank 13 through the right position of lifting Reversing valve plate 6 oil duct 62 by three-way pipe 11 and pipeline 12 by oil inlet and oil return check valve 51, realize the door frame action that hoists.At this moment double-united oil pump 19 is not worked.
Door frame descends to dividing unloaded and have and carries two kinds of operating mode introductions: because the unloaded energy shortage mechanical wear in bucking-out system that descends and reclaim, so in system, be provided with pilot sequencing valve 20, by the break-make of the pressure control oil circuit 10 control sequence valves 20 that draw at the bottom of the lift cylinders, the control presssure size is set according to the system load size.When control presssure that the lift cylinders bottom pressure of lift oil tank 13 is set less than pilot sequencing valve 20, operate lifting Reversing valve plate 6 is to position, a left side, the pressure oil of the cylinder bottom output of lift oil tank 13 passes through the Pt mouth of position, left side oil duct 63 to lifting Reversing valve plate 6 by three-way pipe 11 again through the A1 of lifting Reversing valve plate 6 mouth, through the position, a left side and the flow regulating valve 21 direct oil sump tanks 22 of pilot sequencing valve 20.When control presssure that the cylinder bottom pressure of lift oil tank 13 is set greater than pilot sequencing valve 20, pilot sequencing valve 20 commutates to the right position of diagram (see figure 1).The oil cylinder of lift oil tank 13 the descend pressure oil of the output Pt mouth by lifting Reversing valve plate 6 and the oil suction of the right position oil duct arrival oil pump 3 of pilot sequencing valve 20, because check valve 1 is unidirectional by effect, pressure oil from lift oil tank 13 enters oil pump 3, at this moment oil pump 3 becomes the HM Hydraulic Motor operating mode, drive motor 2 and rotate, make motor 2 become the electrical generator operating mode, electrical generator sends, fast storage battery is charged, realize energy recovery.The suction capacity of the unlatching of check valve 1 design pressure≤16kPa(oil pump 3 wherein), could guarantee that pump effectively works.
Do not work, tilt when forklift door frame hoists and when turning to work, oil pump 3 is not worked, double-united oil pump 19 work fuel feeding, the pressure oil of oil pump 3 output is communicated with first mouth of pipe that the centre is connected the three-way pipe in the valve block 7 by the middle bit port 61 of the Reversing valve plate 6 that hoists, again by second mouth of pipe and oil return inlet T 1 oil sump tank 22 of three-way pipe.Be divided into two parts from the pressure oil of the double-united oil pump 19 output P2 mouth by multiway valve 4 through wherein pressure-gradient control valve 93, a part is preferentially assigned to the P mouth of the load sensing deflector 16 of fork truck from the CF mouth of pressure-gradient control valve 93, promotion turns to turning to of oil cylinder 15 control car bodies, the inclination Reversing valve plate 8 of another part from the EF mouth of pressure-gradient control valve 93 to multiway valve 4 is with the action of control forklift door frame anteversion and retroversion.
When fork truck need hoist and tilt or turn to joint operation, only for hoisting, the pressure oil of double-united oil pump 19 outputs supplied or turns to the pressure oil of oil pump 3 outputs, and action is not interfered each other.
When lifting and inclination (or turning to) are not worked, when valve rod is in center position, the pressure oil of the pressure oil of oil pump 3 outputs and double-united oil pump 19 outputs is through the meta of hoist Reversing valve plate 6 and inclination Reversing valve plate 8, and the three-way pipe that is connected with the centre in the valve block 7 collaborates after oil return inlet T 1 oil sump tank 22.
Claims (1)
1. electri forklift energy-saving hydraulic system, comprise check valve (1), motor (2), oil pump (3), multiway valve (4), lift oil tank (13), dump ram (14), turn to oil cylinder (15), load sensing deflector (16), double-united oil pump (19), pilot sequencing valve (20), flow regulating valve (21), oil filter (18), interconnective pipeline between fuel tank (22) and each parts, it is characterized in that: described multiway valve (4) is the chip multiway valve, comprise oil inlet and oil return valve block (5), lifting Reversing valve plate (6), the middle valve block (7) that connects, inclination Reversing valve plate (8) and oil-feed valve block (9) attach together together by the screw bolt and nut connection between each sheet;
The oil outlet of oil pump (3) is communicated with P1 mouth on the oil inlet and oil return valve block (5), be provided with oil inlet and oil return check valve (51) in the oil inlet and oil return valve block (5), the outlet of oil inlet and oil return check valve (51) is divided into two-way, one the tunnel is being communicated with the import of lifting Reversing valve plate (6), middle bit port (61) by lifting Reversing valve plate (6) communicates with middle first mouth of pipe that is connected the three-way pipe in the valve block (7), second mouth of pipe by three-way pipe is communicated with return opening (T1) by pipeline again, and return opening (T1) is communicated with fuel tank (22) by oil filter (18); Another road is communicated with the import of main safety valve (52), and the outlet of main safety valve (52) is communicated with return opening (T1); The oil outlet (A1) of lifting Reversing valve plate (6) is communicated with first interface of three-way pipe (11), second interface of three-way pipe (11) is communicated with lift oil tank (13) by pipeline (12), and the 3rd interface of three-way pipe (11) is communicated with the control d mouth of pilot sequencing valve (20); The Pt mouth of lifting Reversing valve plate (6) is being communicated with a mouth of pilot sequencing valve (20); The delivery port of double-united oil pump (19) is being communicated with the P2 mouth of oil-feed valve block (9), the P2 mouth of oil-feed valve block (9) is divided into two-way by three-way pipe, one the tunnel is being communicated with the import of by pass valve (91), and the outlet of by pass valve (91) is being communicated with return opening (T1) by ring shaped oil passage (17); Another road is being communicated with pressure-gradient control valve (93), pressure-gradient control valve (93) is communicated with the LS of load sensing deflector (16) by LS signal oil circuit, the CF mouth of pressure-gradient control valve (93) is communicated with the P mouth of load sensing deflector (16), the EF mouth of pressure-gradient control valve (93) is communicated with the oil inlet of inclination Reversing valve plate (8), join with middle the 3rd mouthful of being connected the interior three-way pipe of valve block (7) by the meta oil duct (81) in it, second mouthful of three-way pipe is communicated with return opening (T1); The oil outlet (A2) of inclination Reversing valve plate (8) and oil outlet (B2) are communicated with the rodless cavity and the rod chamber of dump ram (14) respectively; Be provided with draining road (T2) in the sheet in the lifting change-over valve (6), draining road (T2) is being communicated with fuel tank (22);
Described pilot sequencing valve (20) is the two-bit triplet pilot operated valve device, its a mouth links to each other with the Pt mouth of lifting Reversing valve plate (6), its b mouth is communicated with the oil inlet of oil pump (3), and its c mouth communicates with fuel tank (22) by flow regulating valve, and its hydraulic control d mouth is communicated with three-way pipe (11);
Be provided with a main safety valve (52) in the oil inlet and oil return valve block (5) of described multiway valve (4), to limit the maximum working pressure of oil pump (3); Described oil-feed valve block (9) is built-in with by pass valve (91) and turns to by pass valve (92), and by pass valve (91) plays level pressure overflow effect in the hydraulic efficiency pressure system of hybrid power forklift; Turn to an end of by pass valve (92) to communicate with LS signal oil circuit, the other end is communicated with return opening (T1) by ring shaped oil passage (17).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200381772U CN201962039U (en) | 2011-02-15 | 2011-02-15 | Energy-saving hydraulic system of electronic forklift |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200381772U CN201962039U (en) | 2011-02-15 | 2011-02-15 | Energy-saving hydraulic system of electronic forklift |
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| Publication Number | Publication Date |
|---|---|
| CN201962039U true CN201962039U (en) | 2011-09-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011200381772U Expired - Lifetime CN201962039U (en) | 2011-02-15 | 2011-02-15 | Energy-saving hydraulic system of electronic forklift |
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| Country | Link |
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| CN (1) | CN201962039U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102134047A (en) * | 2011-02-15 | 2011-07-27 | 安徽合力股份有限公司 | Energy-saving hydraulic system of electric forklift |
| US9482248B2 (en) | 2012-04-28 | 2016-11-01 | Anhui Heli Co., Ltd | Energy regeneration type forklift hydraulic system |
| CN109052238A (en) * | 2018-08-29 | 2018-12-21 | 广州市广韬教学设备有限公司 | A kind of fluid power system of fork truck |
-
2011
- 2011-02-15 CN CN2011200381772U patent/CN201962039U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102134047A (en) * | 2011-02-15 | 2011-07-27 | 安徽合力股份有限公司 | Energy-saving hydraulic system of electric forklift |
| US9482248B2 (en) | 2012-04-28 | 2016-11-01 | Anhui Heli Co., Ltd | Energy regeneration type forklift hydraulic system |
| CN109052238A (en) * | 2018-08-29 | 2018-12-21 | 广州市广韬教学设备有限公司 | A kind of fluid power system of fork truck |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20110907 Effective date of abandoning: 20130515 |
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| RGAV | Abandon patent right to avoid regrant |