CN107964992B - Energy-saving hydraulic system of wood clamping fork loader - Google Patents
Energy-saving hydraulic system of wood clamping fork loader Download PDFInfo
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- CN107964992B CN107964992B CN201711194497.5A CN201711194497A CN107964992B CN 107964992 B CN107964992 B CN 107964992B CN 201711194497 A CN201711194497 A CN 201711194497A CN 107964992 B CN107964992 B CN 107964992B
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- 239000000463 material Substances 0.000 description 5
- 244000025254 Cannabis sativa Species 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000009977 dual effect Effects 0.000 description 3
- 230000005484 gravity Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000013590 bulk material Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F3/00—Dredgers; Soil-shifting machines
- E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
- E02F3/28—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets
- E02F3/36—Component parts
- E02F3/42—Drives for dippers, buckets, dipper-arms or bucket-arms
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F3/00—Dredgers; Soil-shifting machines
- E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
- E02F3/28—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets
- E02F3/36—Component parts
- E02F3/40—Dippers; Buckets ; Grab devices, e.g. manufacturing processes for buckets, form, geometry or material of buckets
- E02F3/413—Dippers; Buckets ; Grab devices, e.g. manufacturing processes for buckets, form, geometry or material of buckets with grabbing device
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F3/00—Dredgers; Soil-shifting machines
- E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
- E02F3/28—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets
- E02F3/36—Component parts
- E02F3/40—Dippers; Buckets ; Grab devices, e.g. manufacturing processes for buckets, form, geometry or material of buckets
- E02F3/413—Dippers; Buckets ; Grab devices, e.g. manufacturing processes for buckets, form, geometry or material of buckets with grabbing device
- E02F3/4135—Dippers; Buckets ; Grab devices, e.g. manufacturing processes for buckets, form, geometry or material of buckets with grabbing device with grabs mounted directly on a boom
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F3/00—Dredgers; Soil-shifting machines
- E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
- E02F3/28—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets
- E02F3/36—Component parts
- E02F3/42—Drives for dippers, buckets, dipper-arms or bucket-arms
- E02F3/425—Drive systems for dipper-arms, backhoes or the like
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F3/00—Dredgers; Soil-shifting machines
- E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
- E02F3/28—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets
- E02F3/36—Component parts
- E02F3/42—Drives for dippers, buckets, dipper-arms or bucket-arms
- E02F3/43—Control of dipper or bucket position; Control of sequence of drive operations
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Mining & Mineral Resources (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Fluid-Pressure Circuits (AREA)
- Operation Control Of Excavators (AREA)
Abstract
The invention discloses an energy-saving hydraulic system of a wood clamping fork loader, and belongs to the technical field of engineering machinery. The hydraulic system overcomes the defects of slow unloading, fast forking and easy damage to a chassis accident of the traditional wood-clamping fork loader hydraulic system in the prior art. The main structure of the hydraulic control system comprises a duplex pump, a multi-way valve, a fork oil cylinder, a rotary bucket oil cylinder, a movable arm joint control pilot handle, a rotary bucket joint control pilot handle, a fork joint control pilot handle, an oil tank, a first electromagnetic reversing valve, a first pressure switch, a second pressure switch and a third pressure switch, wherein a left oil outlet of the duplex pump is connected with an oil inlet of the multi-way valve, a right oil outlet of the duplex pump is connected with the fork joint control pilot handle, and the valve comprises a multi-way valve auxiliary joint, a multi-way valve rotary bucket joint and a multi-way valve movable arm joint. The invention is mainly used for a wood clamping fork loader.
Description
The technical field is as follows:
the invention belongs to the technical field of engineering machinery, and particularly relates to an energy-saving hydraulic system of a wood clamping fork loader.
The background art comprises the following steps:
the multifunctional loader is also called a differential loader, can realize the functions of shoveling, loading and transferring of the loader, and can realize multiple functions of clamping wood, grabbing grass, grabbing a pipe, holding grass, secondary high unloading and the like by replacing an accessory and expanding by utilizing the auxiliary linkage of the multi-way valve. In view of the development trend of engineering machinery in recent years, product transformation and upgrading have become the main melody of development, and multifunctional loaders are produced and widely used. In terms of the type of the multifunctional loader, more than 70 percent of the multifunctional loader is a wood clamping fork and a grass grasping fork, the working modes of the wood clamping fork and the grass grasping fork are basically the same, and most of the multifunctional loader adopts a hydraulic control mode with superior comfort to replace the traditional mechanical control mode.
The double-layered wooden fork predominant use in present harbour is loading and unloading and transports timber, need unload when the loading, not only will work efficiency be high when unloading, and it is comfortable good to require the operation again, so the problem that exists has:
when the wood clamping fork for clamping and lifting materials is used for discharging, once the gravity center passes through a hinge point, generally called a dead point, the wood clamping fork completes downward discharging action within about 0.3S under the action of gravity under the condition that oil pressure is not established; however, the time for unloading is only 0.3S, and the time is too short, so that the oil pressure of the system cannot be used for the fork opening, the unloading and the fork opening cannot be performed simultaneously, the whole unloading process cannot be completed, and the accident of damaging the chassis is easily caused.
The conventional solutions are as follows:
1. the conventional method for slowing the forking is to increase the displacement of the pump and increase the diameter of the piston rod so as to reduce the oil quantity required by the forking, but the conventional method has the following defects: 1) The original cost is increased by at least 10% by enlarging the pump and thickening the piston rod of the oil cylinder; 2) After the piston rod of the oil cylinder is thickened, the acting area is reduced, and the forking thrust is reduced; 3) After the pump displacement is increased, energy loss can be caused, and parameters of the whole machine, such as the heat dissipation capacity of a radiator, the flow of a multi-way valve and the like, need to be improved.
2. Aiming at the problem of quick unloading of the rotating hopper, the method can be realized by increasing back pressure through a system, but the method has the following defects: since the back pressure continues to exist, a significant energy loss is incurred.
Analysis shows that the reason that the wood clamping fork unloads too fast is mainly that the wood clamping fork brings materials to pass through a dead point, a force is applied to a large cavity of the rotary bucket oil cylinder due to the action of gravity, but the large cavity returns oil directly, and no back pressure exists, so that the oil cylinder falls down fast; meanwhile, the small cavity can form low pressure or vacuum due to untimely oil supplement.
The invention content is as follows:
in order to overcome the defects of slow unloading, fast forking and easy damage to a chassis of a traditional hydraulic system of a wood-clamping fork loader in the prior art, the invention provides an energy-saving hydraulic system of the wood-clamping fork loader, which is different from the prior art, and has the advantages of high system energy saving, energy recovery, and improvement on the working efficiency, the controllability and the safety of the whole machine.
In order to realize the purpose, the invention is realized by adopting the following technical scheme:
an energy-saving hydraulic system of a wood-clamping fork loader comprises a duplex pump, a multi-way valve, a fork oil cylinder, a rotary bucket oil cylinder, a movable arm joint control pilot handle, a rotary bucket joint control pilot handle, a fork joint control pilot handle and an oil tank, wherein an oil outlet at the left side of the duplex pump is connected with an oil inlet of the multi-way valve, and an oil outlet at the right side of the duplex pump is connected with the fork joint control pilot handle; the multi-way valve comprises a multi-way valve auxiliary link, a multi-way valve rotary bucket link and a multi-way valve movable arm link, wherein the multi-way valve auxiliary link is connected with the fork oil cylinder, the multi-way valve rotary bucket link is connected with the rotary bucket oil cylinder, and the multi-way valve movable arm link is connected with the movable arm oil cylinder; the fork linkage control pilot handle sends a pressure signal to the multi-way valve auxiliary linkage, the rotating bucket linkage control pilot handle sends a pressure signal to the rotating bucket linkage of the multi-way valve, and the movable arm linkage control pilot handle sends a pressure signal to the movable arm linkage of the multi-way valve; the energy-saving hydraulic system of the wood-clamping fork loader comprises a first electromagnetic directional valve, a first pressure switch, a second pressure switch and a third pressure switch, wherein an oil port A1 of the first electromagnetic directional valve is connected with a rotary bucket oil cylinder, an oil port B1 of the first electromagnetic directional valve is connected with a rotary bucket of a multi-way valve, and an oil port C1 of the first electromagnetic directional valve is connected with a fork oil cylinder; the first pressure switch is arranged on an oil path of a rod cavity of the rotating bucket oil cylinder, the second pressure switch is arranged on a pilot control oil path b2, and the third pressure switch is arranged on a pilot control oil path b 3.
Further, the energy-saving hydraulic system of the wood-clamping fork loader comprises a second electromagnetic directional valve, a fourth pressure switch, a fifth pressure switch and a sixth pressure switch, wherein an oil port A2 of the second electromagnetic directional valve is connected with a movable arm oil cylinder, an oil port B2 is connected with a multi-way valve movable arm, and an oil port C2 is connected with a rotary bucket oil cylinder; the fourth pressure switch is arranged on a rodless cavity oil path of the rotary bucket oil cylinder, the fifth pressure switch is arranged on a pilot control oil path b1, and the sixth pressure switch is arranged on a pilot control oil path a 2.
Furthermore, the energy-saving hydraulic system of the wood-clamping fork loader is provided with an overflow valve, an oil inlet of the overflow valve is connected with an oil outlet at the right side of the double pump, and an oil outlet of the overflow valve is connected with an oil tank.
Furthermore, the energy-saving hydraulic system of the wood-clamping fork loader is provided with a first one-way valve, an oil inlet of the first one-way valve is connected with an oil port C1 of the first electromagnetic directional valve, and an oil outlet of the first one-way valve is connected with the fork oil cylinder.
Furthermore, the energy-saving hydraulic system of the wood-clamping fork loader is also provided with a second one-way valve, an oil inlet of the second one-way valve is connected with an oil port C2 of a second electromagnetic directional valve, and an oil outlet of the second one-way valve is connected with a rotary bucket oil cylinder.
Further, the first electromagnetic directional valve and the second electromagnetic directional valve are both two-position electromagnetic directional valves.
Compared with the prior art, the invention has the beneficial effects that:
1. the energy saving performance of the system is improved, and the energy conversion of the kinetic energy generated when the bucket discharges materials is effectively utilized and converted into the pressure energy for making the wood clamping fork open;
2. the operation safety is improved, after the bucket passes through a dead point, the unloading speed of the bucket is effectively reduced, and accidents such as the damage of the pallet truck and the like are prevented;
3. the operation efficiency is improved, and the wood clamping fork is forked and the unloading composite action is perfectly coordinated.
Description of the drawings:
FIG. 1 is a schematic diagram of a hydraulic system of the present invention;
FIG. 2 is a schematic view of the high position upper fork closing and lower fork closing state of the present invention;
FIG. 3 is a schematic view of a high-position upper fork and lower fork unloading state in the present invention;
FIG. 4 is a schematic diagram of the highest position of the movable arm + the unloading state of the lower fork in the present invention;
fig. 5 is a schematic diagram of the state after the movable arm falls and the state from the lower fork receiving to the flat state in the invention.
In the figure: 1. an oil tank; 2. an overflow valve; 3. a tandem pump; 4. the multi-way valve is connected in an auxiliary way; 5. a multi-way valve; 6. a fork oil cylinder; 7. a first check valve; 8. a first electromagnetic directional valve; 9. a rotating bucket oil cylinder; 10. a first pressure switch; 11. a second one-way valve; 12. a fourth pressure switch; 13. a second electromagnetic directional valve; 14. a boom cylinder; 15. the multi-way valve is connected with a rotary bucket; 16. the multi-way valve is movable arm linkage; 17. a fifth pressure switch; 18. the movable arm is connected with a control pilot handle; 19. a sixth pressure switch; 20. a second pressure switch; 21. the rotating bucket is connected with a control pilot handle; 22. a third pressure switch; 23. the fork joint controls the pilot handle; 24. an upper fork; 25. a lower fork; 26. and a movable arm.
The specific implementation mode is as follows:
the invention is further illustrated by the following specific examples in combination with the accompanying drawings.
Example 1:
as shown in fig. 1, the energy-saving hydraulic system of the wood-clamping fork loader comprises a dual pump 3, a multi-way valve 5, a fork oil cylinder 6, a rotary bucket oil cylinder 9, a movable arm oil cylinder 14, a movable arm joint control pilot handle 18, a rotary bucket joint control pilot handle 21, a fork joint control pilot handle 23 and an oil tank 1, wherein a left oil outlet of the dual pump 3 is connected with an oil inlet of the multi-way valve 5, and a right oil outlet of the dual pump 3 is connected with the fork joint control pilot handle 23; the multi-way valve 5 comprises a multi-way valve auxiliary link 4, a multi-way valve rotating bucket link 15 and a multi-way valve movable arm link 16, the multi-way valve auxiliary link 4 is connected with the fork oil cylinder 6, the multi-way valve rotating bucket link 15 is connected with the rotating bucket oil cylinder 9, and the multi-way valve movable arm link 16 is connected with the movable arm oil cylinder 14; a fork joint control pilot handle 23 sends a pressure signal to the multi-way valve auxiliary joint 4, a rotating bucket joint control pilot handle 21 sends a pressure signal to a multi-way valve rotating bucket joint 15, and a movable arm joint control pilot handle 18 sends a pressure signal to a multi-way valve movable arm joint 16; the energy-saving hydraulic system of the wood-clamping fork loader comprises a first electromagnetic directional valve 8, a first pressure switch 10, a second pressure switch 20 and a third pressure switch 22, wherein an oil port A1 of the first electromagnetic directional valve 8 is connected with a rotary bucket oil cylinder 9, an oil port B1 is connected with a multi-way valve rotary bucket linkage 15, and an oil port C1 is connected with a fork oil cylinder 6; the first pressure switch 10 is provided on the rod chamber oil path of the swing cylinder 9, the second pressure switch 20 is provided on the pilot control oil path b2, and the third pressure switch 22 is provided on the pilot control oil path b 3.
Example 2:
an energy-saving hydraulic system of a wood-clamping fork loader comprises a second electromagnetic directional valve 13, a fourth pressure switch 12, a fifth pressure switch 17 and a sixth pressure switch 19, wherein an oil port A2 of the second electromagnetic directional valve 13 is connected with a movable arm cylinder 14, an oil port B2 is connected with a multi-way valve movable arm link 16, and an oil port C2 is connected with a rotary bucket cylinder 9; the fourth pressure switch 12 is provided on the rodless cavity oil path of the bucket cylinder 9, the fifth pressure switch 17 is provided on the pilot control oil path b1, and the sixth pressure switch 19 is provided on the pilot control oil path a 2. The other portions are the same as in example 1.
Example 3:
an energy-saving hydraulic system of a wood-clamping fork loader is provided with an overflow valve 2, an oil inlet of the overflow valve 2 is connected with an oil outlet at the right side of a duplex pump 3, and an oil outlet is connected with an oil tank 1. The other portions are the same as in example 2.
Example 4:
an energy-saving hydraulic system of a wood-clamping fork loader is provided with a first one-way valve 7, an oil inlet of the first one-way valve 7 is connected with an oil port C1 of a first electromagnetic directional valve 8, and an oil outlet of the first one-way valve is connected with a fork oil cylinder 6. The other portions are the same as in example 3.
Example 5:
the energy-saving hydraulic system of the wood-clamping fork loader is also provided with a second one-way valve 11, an oil inlet of the second one-way valve 11 is connected with an oil port C2 of a second electromagnetic directional valve 13, and an oil outlet of the second one-way valve is connected with a rotary bucket oil cylinder 9; the first electromagnetic directional valve 8 and the second electromagnetic directional valve 13 are both two-position electromagnetic directional valves. The rest is the same as in example 4.
The working principle of the invention is as follows:
the states shown in fig. 2 to 3 are the working condition one, namely the high-position lower fork 25 discharging + the upper fork 24 forking composite action.
When the working condition is one, the rotating bucket joint control pilot handle 21 and the fork joint control pilot handle 23 are operated at the same time, the rotating bucket joint control pilot handle 21 controls the multi-way valve rotating bucket joint 15 to change the direction, oil flowing out of the duplex pump 3 enters a rod cavity of the rotating bucket oil cylinder 9 through the multi-way valve 5, retraction of the rotating bucket oil cylinder 9 is realized, and a wood clamping fork is used for unloading; the fork joint control pilot handle 23 controls the multi-way valve auxiliary joint 4 to change the direction, oil flowing out of the duplex pump 3 enters a rod cavity of the fork oil cylinder 6 through the multi-way valve 5, and the fork oil cylinder 6 retracts; when the wood clamping fork is used for forking and unloading, the wood clamping fork and the material are pushed under the action of the rotary bucket oil cylinder 9, and the material can quickly and automatically fall down under the action of a load after passing through a dead point, because the wood clamping fork is used for loading and unloading large-sized wood, is not bulk material of a loader and cannot quickly fall down for unloading, so that a pallet truck is prevented from being injured by smashing, the pressure of a rod cavity of the rotary bucket oil cylinder 9 is monitored through the first pressure switch 10, whether the rotary bucket oil cylinder 9 passes through the dead point or not is identified, and if the pressure is lower than 0.5MPa, the dead point is indicated, the first pressure switch 10 is closed; the pilot pressure of the rotating bucket joint control pilot handle 21 is monitored through the second pressure switch 20, the pilot pressure of the fork joint control pilot handle 23 is monitored through the third pressure switch 22, if the pilot pressures of the second pressure switch 20 and the third pressure switch 22 are simultaneously greater than 1MPa, the second pressure switch 20 and the third pressure switch 22 are both closed, the fork joint control pilot handle 23 starts to operate, the first electromagnetic reversing valve 8 starts to be electrified when the first pressure switch 10, the second pressure switch 20 and the third pressure switch 22 are simultaneously closed, the upper position of the first electromagnetic reversing valve 8 starts to work, the rodless cavity return oil of the rotating bucket cylinder 9 discharging from the lower fork 25 is throttled, the back pressure is generated, the discharging speed is reduced, and meanwhile, high-pressure oil generated after the rodless cavity is throttled flows into the rod cavity of the fork cylinder 6 through the oil ports A1, C1 and the first check valve 7, the fork speed of the fork cylinder 6 is improved, and the purposes of slow discharging, fast forking and fast recovery of system energy are achieved. The hydraulic energy of the upper fork 24 for forking is supplemented by the kinetic energy of the lower fork 25 for unloading, and the compound action of forking of the upper fork 24 and unloading of the lower fork 25 is realized.
The state shown in fig. 4 to 5 is the second operating condition, i.e., the boom 26 falls and the lower fork 25 unloads and stows the bucket to the horizontal position.
Under a second working condition, because the movable arm 26 falls to a horizontal position at the highest position, and the lower fork 25 is enabled to move from a discharging position to a horizontal collecting position so as to perform the next working cycle, the pressure of the rodless cavity of the rotary bucket cylinder 9 is monitored through the fourth pressure switch 12, when the pressure is lower than 2MPa, the fourth pressure switch 12 is closed, the pilot pressure of the movable arm 26 of the movable arm linkage control pilot handle 18 is monitored through the fifth pressure switch 17 when the movable arm 26 descends, the pilot pressure of the fork collecting of the rotary bucket linkage control pilot handle 21 is monitored through the sixth pressure switch 19, and when the pilot pressures of the fifth pressure switch 17 and the sixth pressure switch 19 are simultaneously greater than 1MPa, the fifth pressure switch 17 and the sixth pressure switch 19 are closed; when the fourth pressure switch 12, the fifth pressure switch 17 and the sixth pressure switch 19 are closed at the same time, the second electromagnetic directional valve 13 is controlled to start to be powered on, the upper position of the second electromagnetic directional valve 13 starts to work, the rodless cavity of the boom cylinder 14 is throttled, the boom 26 descends slowly, meanwhile, high-pressure oil generated after the oil in the rodless cavity of the boom cylinder 14 is throttled flows into the rodless cavity of the rotating bucket cylinder 9 through the oil port A2, the oil port C2 and the second check valve 11, and the purpose of fast bucket retracting of the lower fork 25 is achieved. The kinetic energy of the descending of the movable arm 26 is converted into hydraulic energy for the bucket collection of the lower fork 25, the bucket collection of the lower fork 25 is carried out to the horizontal position, the energy is recycled, the energy consumption and the working cycle time of the whole machine are reduced, and meanwhile, the control difficulty is reduced.
The wood clamping forks described herein include an upper fork 24 and a lower fork 25.
Claims (6)
1. An energy-saving hydraulic system of a wood-clamping fork loader comprises a duplex pump (3), a multi-way valve (5), a fork oil cylinder (6), a rotating bucket oil cylinder (9), a movable arm oil cylinder (14), a movable arm joint control pilot handle (18), a rotating bucket joint control pilot handle (21), a fork joint control pilot handle (23) and an oil tank (1), wherein a left oil outlet of the duplex pump (3) is connected with an oil inlet of the multi-way valve (5), and a right oil outlet of the duplex pump (3) is connected with the fork joint control pilot handle (23); the multi-way valve (5) comprises a multi-way valve auxiliary link (4), a multi-way valve rotating bucket link (15) and a multi-way valve movable arm link (16), the multi-way valve auxiliary link (4) is connected with the fork oil cylinder (6), the multi-way valve rotating bucket link (15) is connected with the rotating bucket oil cylinder (9), and the multi-way valve movable arm link (16) is connected with the movable arm oil cylinder (14); a fork joint control pilot handle (23) sends a pressure signal to a multi-way valve auxiliary joint (4), a rotary bucket joint control pilot handle (21) sends a pressure signal to a multi-way valve rotary bucket joint (15), and a movable arm joint control pilot handle (18) sends a pressure signal to a movable arm joint (16) of the multi-way valve; the method is characterized in that: the energy-saving hydraulic system of the wood-clamping fork loader comprises a first electromagnetic directional valve (8), a first pressure switch (10), a second pressure switch (20) and a third pressure switch (22), wherein an oil port A1 of the first electromagnetic directional valve (8) is connected with a rotary bucket oil cylinder (9), an oil port B1 is connected with a multi-way valve rotary bucket coupler (15), and an oil port C1 is connected with a fork oil cylinder (6); the first pressure switch (10) is arranged on an oil path of a rod cavity of the rotating bucket oil cylinder (9), the second pressure switch (20) is arranged on the pilot control oil path b2, and the third pressure switch (22) is arranged on the pilot control oil path b 3.
2. The energy-saving hydraulic system of a wood-fork loader of claim 1, wherein: the energy-saving hydraulic system of the wood-clamping fork loader comprises a second electromagnetic reversing valve (13), a fourth pressure switch (12), a fifth pressure switch (17) and a sixth pressure switch (19), wherein an oil port A2 of the second electromagnetic reversing valve (13) is connected with a movable arm oil cylinder (14), an oil port B2 is connected with a multi-way valve movable arm linkage (16), and an oil port C2 is connected with a rotary bucket oil cylinder (9); the fourth pressure switch (12) is arranged on a rodless cavity oil path of the rotating bucket oil cylinder (9), the fifth pressure switch (17) is arranged on the pilot control oil path b1, and the sixth pressure switch (19) is arranged on the pilot control oil path a 2.
3. The energy-saving hydraulic system of a wood-fork loader of claim 2, wherein: the energy-saving hydraulic system of the wood-clamping fork loader is provided with an overflow valve (2), an oil inlet of the overflow valve (2) is connected with an oil outlet at the right side of a duplex pump (3), and an oil outlet is connected with an oil tank (1).
4. The energy-saving hydraulic system of a wood-fork loader of claim 3, wherein: the energy-saving hydraulic system of the wood-clamping fork loader is provided with a first one-way valve (7), an oil inlet of the first one-way valve (7) is connected with an oil port C1 of a first electromagnetic directional valve (8), and an oil outlet of the first one-way valve is connected with a fork oil cylinder (6).
5. The energy-saving hydraulic system of a wood-fork loader of claim 4, wherein: the energy-saving hydraulic system of the wood-clamping fork loader is further provided with a second one-way valve (11), an oil inlet of the second one-way valve (11) is connected with an oil port C2 of a second electromagnetic directional valve (13), and an oil outlet of the second one-way valve is connected with a rotary bucket oil cylinder (9).
6. The energy-saving hydraulic system of a wood-clamping fork loader of claim 5, wherein: the first electromagnetic directional valve (8) and the second electromagnetic directional valve (13) are both two-position electromagnetic directional valves.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711194497.5A CN107964992B (en) | 2017-11-24 | 2017-11-24 | Energy-saving hydraulic system of wood clamping fork loader |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711194497.5A CN107964992B (en) | 2017-11-24 | 2017-11-24 | Energy-saving hydraulic system of wood clamping fork loader |
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| CN107964992A CN107964992A (en) | 2018-04-27 |
| CN107964992B true CN107964992B (en) | 2023-03-17 |
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| CN108560634B (en) * | 2018-07-02 | 2020-01-07 | 广西柳工机械股份有限公司 | Hydraulic system of loader working device |
| CN110145507A (en) * | 2019-05-20 | 2019-08-20 | 江苏柳工机械有限公司 | Auxiliary connection hydraulic system |
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| JP2002021109A (en) * | 2000-07-06 | 2002-01-23 | Hitachi Constr Mach Co Ltd | Working machinery |
| JP2010031483A (en) * | 2008-07-25 | 2010-02-12 | Aimekku:Kk | Automatic control device for tilt angle of cargo handling operation machine of construction vehicle |
| CN102635144A (en) * | 2012-05-04 | 2012-08-15 | 山东理工大学 | Hydraulic system for loader |
| CN107288945A (en) * | 2017-07-18 | 2017-10-24 | 山东临工工程机械有限公司 | Differentiation loading machine rotating bucket joins and auxiliary connection composite control hydraulic system |
| CN207620022U (en) * | 2017-11-24 | 2018-07-17 | 山东临工工程机械有限公司 | Folder wood fork loading machine energy-saving hydraulic system |
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2017
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| JP2002021109A (en) * | 2000-07-06 | 2002-01-23 | Hitachi Constr Mach Co Ltd | Working machinery |
| JP2010031483A (en) * | 2008-07-25 | 2010-02-12 | Aimekku:Kk | Automatic control device for tilt angle of cargo handling operation machine of construction vehicle |
| CN102635144A (en) * | 2012-05-04 | 2012-08-15 | 山东理工大学 | Hydraulic system for loader |
| CN107288945A (en) * | 2017-07-18 | 2017-10-24 | 山东临工工程机械有限公司 | Differentiation loading machine rotating bucket joins and auxiliary connection composite control hydraulic system |
| CN207620022U (en) * | 2017-11-24 | 2018-07-17 | 山东临工工程机械有限公司 | Folder wood fork loading machine energy-saving hydraulic system |
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