CN208831356U - A kind of forklift hydraulic control system - Google Patents
A kind of forklift hydraulic control system Download PDFInfo
- Publication number
- CN208831356U CN208831356U CN201821720645.2U CN201821720645U CN208831356U CN 208831356 U CN208831356 U CN 208831356U CN 201821720645 U CN201821720645 U CN 201821720645U CN 208831356 U CN208831356 U CN 208831356U
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- valve
- solenoid directional
- directional control
- control valve
- oil
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- 239000002828 fuel tank Substances 0.000 claims abstract description 16
- 238000009825 accumulation Methods 0.000 claims description 3
- 230000005611 electricity Effects 0.000 claims description 3
- 239000003921 oil Substances 0.000 description 101
- 239000010720 hydraulic oil Substances 0.000 description 17
- 239000007788 liquid Substances 0.000 description 3
- 230000003139 buffering effect Effects 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000004069 differentiation Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
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- Forklifts And Lifting Vehicles (AREA)
Abstract
A kind of forklift hydraulic control system, including fuel tank, hydraulic pump, first solenoid directional control valve, second solenoid directional control valve, first speed governing valve, second speed governing valve, hydraulic control one-way valve, third electro connecting pressure gauge and amplitude oil cylinder, the oil outlet of hydraulic pump is connect with the oil inlet of the first solenoid directional control valve, the oil return opening of first solenoid directional control valve is connect with fuel tank, first oil outlet of the first solenoid directional control valve is connect with the oil inlet of the first speed governing valve, second oil outlet of the first solenoid directional control valve and the rod chamber of amplitude oil cylinder connect, the oil inlet of the oil outlet of first speed governing valve and the second solenoid directional control valve is connect with the oil inlet of the second speed governing valve respectively, the oil outlet of the oil outlet of second solenoid directional control valve and the second speed governing valve connects with the oil inlet of hydraulic control one-way valve respectively.The utility model carries out pressure maintaining using hydraulic control one-way valve, and when amplitude oil cylinder is motionless, the stabilized pressure of hydraulic control one-way valve avoids amplitude oil cylinder from slowly falling because of the weight of the components such as cantilever crane, the inserting mechanism of forklift and cargo.
Description
Technical field
The utility model relates to the technical fields of forklift, and in particular to a kind of forklift hydraulic control system.
Background technique
Forklift has the function of inserting, transport cargo, saves a large amount of manpower and material resources, is widely used.Forklift includes arm
The components such as frame, inserting mechanism, amplitude oil cylinder, amplitude oil cylinder is used to drive the lifting of cantilever crane, and then drives the lifting of inserting mechanism,
It is general at present just to connect one way sequence valve without bar used in hydraulic cylinder, to avoid hydraulic cylinder because of self weight and coupled component
Weight and automatic descending, but this sample loading mode is suitable for the little occasion of weight of hydraulic cylinder and coupled component, arm
The weight of the components such as frame, inserting mechanism is larger, connects one way sequence valve in the rodless cavity of amplitude oil cylinder, it is difficult to avoid amplitude oil cylinder
Because the weight of the components such as cantilever crane, inserting mechanism and cargo slowly falls.
Utility model content
The purpose of this utility model is that: a kind of forklift hydraulic control system is provided, the luffing oil of forklift is solved
The technical issues of cylinder slowly falls because of the weight of the components such as cantilever crane, the inserting mechanism of forklift and cargo.
The technical solution that the utility model is taken are as follows:
A kind of forklift hydraulic control system, including fuel tank, hydraulic pump, the first solenoid directional control valve, the second electromagnetic switch
Valve, the first speed governing valve, the second speed governing valve, hydraulic control one-way valve, third electro connecting pressure gauge and amplitude oil cylinder, the oil outlet of hydraulic pump
It is connect with the oil inlet of the first solenoid directional control valve, the oil return opening of the first solenoid directional control valve is connect with fuel tank, the first solenoid directional control valve
The first oil outlet connect with the oil inlet of the first speed governing valve, the second oil outlet of the first solenoid directional control valve and having for amplitude oil cylinder
The oil inlet of rod cavity connection, the oil outlet of the first speed governing valve and the second solenoid directional control valve connects with the oil inlet of the second speed governing valve respectively
It connects, the oil outlet of the oil outlet of the second solenoid directional control valve and the second speed governing valve is connect with the oil inlet of hydraulic control one-way valve respectively, liquid
The rodless cavity of the oil outlet and amplitude oil cylinder of controlling check valve connects, and the hydraulic control mouth of hydraulic control one-way valve and the rod chamber of amplitude oil cylinder connect
It connects, third electro connecting pressure gauge is arranged on the connecting line of hydraulic control one-way valve and amplitude oil cylinder rodless cavity.
Forklift hydraulic control system further includes third solenoid directional control valve, the 4th solenoid directional control valve, the 5th electromagnetic switch
Valve, the 6th solenoid directional control valve, the 7th solenoid directional control valve, the first accumulator, the second accumulator, the first electro connecting pressure gauge and second
Electro connecting pressure gauge, third solenoid valve are arranged on the oil return opening of the first solenoid directional control valve and the connecting line of fuel tank, and first stores
Energy device and the rod chamber of amplitude oil cylinder connect, and the first electro connecting pressure gauge and the 6th solenoid directional control valve are successively set on the first accumulation of energy
On device and the connecting line of amplitude oil cylinder；The connection of the oil inlet of second accumulator and hydraulic control one-way valve, the second electro connecting pressure gauge
It is arranged on the connecting line of the second accumulator and hydraulic control one-way valve with the 4th solenoid directional control valve；The oil inlet of 5th solenoid directional control valve
Mouth is connect with the first accumulator, and the oil outlet of the 5th solenoid directional control valve and the oil inlet of hydraulic control one-way valve connect；7th electromagnetism changes
It is connect to the oil inlet of valve with the second accumulator, the oil outlet of the 7th solenoid directional control valve and the rod chamber of amplitude oil cylinder connect.
The first check valve, the oil inlet of the first check valve are equipped on the connecting line of hydraulic pump and the first solenoid directional control valve
It is connect with the oil inlet of hydraulic pump, the oil outlet of the first check valve is connect with the oil inlet of the first solenoid directional control valve；It is single first
It is connected with safety valve to the oil outlet of valve, the unloading port of safety valve connect with fuel tank.
First solenoid directional control valve is three-position four-way electromagnetic directional valve, the second solenoid directional control valve, third solenoid directional control valve, the 4th
Solenoid directional control valve, the 5th solenoid directional control valve, the 6th solenoid directional control valve and the 7th solenoid directional control valve are 2/2-way electromagnetic switch
Valve.
The utility model carries out pressure maintaining, when amplitude oil cylinder is motionless, the stabilized pressure of hydraulic control one-way valve using hydraulic control one-way valve
Power avoids amplitude oil cylinder because the weight of the components such as cantilever crane, the inserting mechanism of forklift and cargo slowly falls, third electric contact pressure
Power table is used to detect the pressure of amplitude oil cylinder rodless cavity, the first speed governing valve and the second speed control valves series, and in the first speed governing valve
Locate the second solenoid directional control valve in parallel, the goods for realizing the balance switching of two kinds of speed, suitable for forklift inserting different weight
Object makes to insert steady progress and improves working efficiency；First accumulator and the second accumulator are used to storage energy, forklift
When load walking, when road conditions are poor, the first accumulator and the second accumulator are respectively the rodless cavity and its rod chamber of amplitude oil cylinder
Hydraulic oil is supplemented, the vibration of amplitude oil cylinder is reduced；First electro connecting pressure gauge is used to detect the pressure of the first accumulator, the second electricity
Contact pressure table is used to detect the pressure of the second accumulator.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model.
Specific embodiment
As shown in Figure 1, a kind of forklift hydraulic control system, including fuel tank 1, hydraulic pump 2, the first solenoid directional control valve 6,
Second solenoid directional control valve 19, the first speed governing valve 7, the second speed governing valve 9, hydraulic control one-way valve 13, third electro connecting pressure gauge 14 and change
The flow of width oil cylinder 15, the control of the first speed governing valve 7 is greater than the flow of the second speed governing valve 9, the oil outlet of hydraulic pump 2 and the first electromagnetism
The oil inlet of reversal valve 6 connects, and the oil return opening of the first solenoid directional control valve 6 is connect with fuel tank 1, and the first of the first solenoid directional control valve 6
Oil outlet is connect with the oil inlet of the first speed governing valve 7, and the second oil outlet of the first solenoid directional control valve 6 and amplitude oil cylinder 15 have bar
Chamber connection, the oil inlet of the oil outlet of the first speed governing valve 7 and the second solenoid directional control valve 19 oil inlet with the second speed governing valve 9 respectively
Connection, the oil outlet of the oil outlet of the second solenoid directional control valve 19 and the second speed governing valve 9 oil inlet with hydraulic control one-way valve 13 respectively
Connection, the oil outlet of hydraulic control one-way valve 13 are connect with the rodless cavity of amplitude oil cylinder 15, the hydraulic control mouth and luffing of hydraulic control one-way valve 13
The rod chamber of oil cylinder 15 connects, and the company of hydraulic control one-way valve 13 Yu 15 rodless cavity of amplitude oil cylinder is arranged in third electro connecting pressure gauge 14
Adapter tube road.
Forklift further includes that third solenoid directional control valve 5, the 4th solenoid directional control valve 8, the 5th electromagnetism change with hydraulic control system
To valve 11, the 6th solenoid directional control valve 20, the 7th solenoid directional control valve 17, the first accumulator 12, the second accumulator 16, the first electric contact
The oil return opening and oil of the first solenoid directional control valve 6 is arranged in pressure gauge 10 and the second electro connecting pressure gauge 18, third solenoid directional control valve 5
On the connecting line of case 1, the first accumulator 12 is connect with the rod chamber of amplitude oil cylinder 15, the first electro connecting pressure gauge 10 and the 6th
Solenoid directional control valve 20 is successively set on the first accumulator 12 and the connecting line of amplitude oil cylinder 15；Second accumulator 16 and hydraulic control
The oil inlet of check valve 13 connects, the second electro connecting pressure gauge 18 and the setting of the 4th solenoid directional control valve 8 the second accumulator 16 with
On the connecting line of hydraulic control one-way valve 13；The oil inlet of 5th solenoid directional control valve 11 is connect with the first accumulator 12, the 5th electromagnetism
The oil outlet of reversal valve 11 is connect with the oil inlet of hydraulic control one-way valve 13；The oil inlet of 7th solenoid directional control valve 17 and the second accumulation of energy
Device 16 connects, and the oil outlet of the 7th solenoid directional control valve 17 is connect with the rod chamber of amplitude oil cylinder 15.
On the connecting line of hydraulic pump 2 and the first solenoid directional control valve 6 be equipped with the first check valve 3, the first check valve 3 into
Hydraulic fluid port is connect with the oil inlet of hydraulic pump 2, and the oil outlet of the first check valve 3 is connect with the oil inlet of the first solenoid directional control valve 6, the
The effect of one check valve 3 is that the hydraulic oil of anti-locking system is flow backwards；It is connected with safety valve 4 in the oil outlet of the first check valve 3, safety
The unloading port of valve 4 connect with fuel tank 1, and safety valve 4 plays a protective role, and prevents the excessively high damage Hydraulic Elements of system pressure.
First solenoid directional control valve 6 be three-position four-way electromagnetic directional valve, the second solenoid directional control valve 19, third solenoid directional control valve 5,
4th solenoid directional control valve 8, the 5th solenoid directional control valve 11, the 6th solenoid directional control valve 20 and the 7th solenoid directional control valve 17 are two two
Electric change valve.
The utility model carries out pressure maintaining using hydraulic control one-way valve 13, and when amplitude oil cylinder 15 is motionless, hydraulic control one-way valve 13 is steady
Surely pressure is lived, amplitude oil cylinder 15 is avoided slowly to fall because of the weight of the components such as cantilever crane, the inserting mechanism of forklift and cargo.Fork dress
The motor of the working principle forklift of machine hydraulic control system is that hydraulic pump 2 provides power, and hydraulic pump 2 is by the liquid in fuel tank 1
Pressure oil pumps out, when amplitude oil cylinder 15 rise when, the left position of the first solenoid directional control valve 6 obtain it is electric, be switched to its left position work, hydraulic oil
The first solenoid directional control valve 6 is flowed to from the first check valve 3, hydraulic oil is flowed out from the first oil outlet of the first solenoid directional control valve 6, when slotting
When the cargo of dress is heavier, the right position power-off of the second solenoid directional control valve 19 is switched to left position work, and the second solenoid directional control valve 19 disconnects,
Enter the flow of 15 rodless cavity of amplitude oil cylinder by the control of the second speed governing valve 9, flow is small, and speed is slow, and hydraulic oil is from the second speed governing valve 9
It drives the hydraulic stem of amplitude oil cylinder 15 to stretch out subsequently into the rodless cavity of amplitude oil cylinder 15 into hydraulic control one-way valve 13, makes to insert
Mechanism steadily carries out, and when the cargo of inserting is lighter, the right position of the second solenoid directional control valve 19 obtains electric, is switched to the work of right position, and second
Solenoid directional control valve 19 is connected, and the flow of 15 rodless cavity of amplitude oil cylinder is entered by the control of the first speed governing valve 7, flow is big, and speed is fast, liquid
Pressure oil enters hydraulic control one-way valve 13 from the first speed governing valve 7, subsequently into the rodless cavity of amplitude oil cylinder 15, drives amplitude oil cylinder 15
Hydraulic stem stretches out, and carries out inserting mechanism steadily, improves working efficiency；The right position of 6th solenoid directional control valve 20 obtains electric, is switched to
Its right position work, the 6th solenoid directional control valve 20 are connected, and the right position power-off of third solenoid directional control valve 5 is switched to the work of its left position, the
Three solenoid directional control valves 5 disconnect, and the hydraulic oil of 15 rod chamber of amplitude oil cylinder enters the first accumulator by the 6th solenoid directional control valve 20
12, the first electro connecting pressure gauge 10 detects the pressure of the first accumulator 12 in time, when reaching the upper limit value of the first accumulator 12,
The right position of 6th solenoid directional control valve 20 powers off, and is switched to the work of its left position, and the 6th solenoid directional control valve 20 disconnects, third electromagnetic switch
The right position of valve 5 obtains electric, is switched to its right position work, third solenoid directional control valve 5 is connected, the hydraulic oil warp of 15 rod chamber of amplitude oil cylinder
First solenoid directional control valve 6 and third solenoid directional control valve 5 flow back to fuel tank 1；When amplitude oil cylinder 15 declines, the first solenoid directional control valve 6
Right position obtain electric, be switched to its right position work, hydraulic oil flows to the first solenoid directional control valve 6 from the first check valve 3, and hydraulic oil is from the
Second oil outlet of one solenoid directional control valve 6 flows out, and into the rod chamber of amplitude oil cylinder 15, while having hydraulic oil from hydraulic control one-way valve
13 hydraulic control mouth enters, and control hydraulic control one-way valve 13 is connected, and the hydraulic oil of 15 rodless cavity of amplitude oil cylinder is flowed from hydraulic control one-way valve 13
Out, the left position of the 4th solenoid directional control valve 8 obtains electric, and the 4th solenoid directional control valve 8 is connected, and the right position power-off of third solenoid directional control valve 5 is cut
The work of its left position is changed to, third solenoid directional control valve 5 disconnects, and the hydraulic oil of 15 rodless cavity of amplitude oil cylinder passes through the 4th solenoid directional control valve
8 flow to the second accumulator 16, and the second electro connecting pressure gauge 18 is used to detect the pressure of the second accumulator 16, connects when reaching the second electricity
When the upper limit value of point pressure table 18, the left position of the 4th solenoid directional control valve 8 is powered off, and the 4th solenoid directional control valve 8 disconnects, and third electromagnetism changes
Obtained to the right position of valve 5 electric, be switched to its right position work, third solenoid directional control valve 5 is connected, hydraulic oil from hydraulic control one-way valve 13 successively
After flowing through the first speed governing valve 7, the second speed governing valve 9, the first solenoid directional control valve 6 and third solenoid directional control valve 5, fuel tank 1 is flowed back to；Work as fork
When walking, the left position of the 5th solenoid directional control valve 11 obtains electric, the 5th solenoid directional control valve 11 conducting, the 7th electromagnetic switch for installation load
The right position of valve 17 obtain it is electric, the 7th solenoid directional control valve 17 conducting, encounter road bumps, when amplitude oil cylinder 15 has a declining tendency,
The hydraulic oil of 15 rodless cavity of amplitude oil cylinder has a small amount of leakages, and amplitude oil cylinder is replenished in time in the hydraulic oil in the second accumulator 16
15 rod chamber, when amplitude oil cylinder 15 has the tendency that rising, the hydraulic oil of 15 rod chamber of amplitude oil cylinder has a small amount of leakages, the
The rodless cavity of amplitude oil cylinder 15 is replenished in time in hydraulic oil in one accumulator 12, plays the role of damping, buffering.
" first ", " second ", " third " etc. do not have particular meaning, differentiation merely for convenience, phase in the utility model
It closes and is connected between Hydraulic Elements by hydraulic tube.
Above-described embodiment is the explanation to the utility model, is not the restriction to the utility model, and any pair of sheet is practical new
Scheme after type simple transformation belongs to the protection scope of the utility model.
Claims (4)
1. a kind of forklift hydraulic control system, including fuel tank, hydraulic pump, the first solenoid directional control valve, the second solenoid directional control valve,
First speed governing valve, the second speed governing valve, hydraulic control one-way valve, third electro connecting pressure gauge and amplitude oil cylinder, it is characterised in that: hydraulic pump
Oil outlet connect with the oil inlet of the first solenoid directional control valve, the oil return opening of the first solenoid directional control valve is connect with fuel tank, first electricity
First oil outlet of magnetic reversal valve is connect with the oil inlet of the first speed governing valve, the second oil outlet and luffing of the first solenoid directional control valve
The rod chamber of oil cylinder connects, the oil inlet of the oil outlet of the first speed governing valve and the second solenoid directional control valve respectively with the second speed governing valve
Oil inlet connection, the oil outlet of the oil outlet of the second solenoid directional control valve and the second speed governing valve respectively with the oil inlet of hydraulic control one-way valve
The rodless cavity of connection, the oil outlet of hydraulic control one-way valve and amplitude oil cylinder connects, the hydraulic control mouth of hydraulic control one-way valve and amplitude oil cylinder
Rod chamber connection, third electro connecting pressure gauge are arranged on the connecting line of hydraulic control one-way valve and amplitude oil cylinder rodless cavity.
2. forklift hydraulic control system as described in claim 1, it is characterised in that: forklift with hydraulic control system also
Including third solenoid directional control valve, the 4th solenoid directional control valve, the 5th solenoid directional control valve, the 6th solenoid directional control valve, the 7th electromagnetic switch
Valve, the first accumulator, the second accumulator, the first electro connecting pressure gauge and the second electro connecting pressure gauge, the setting of third solenoid valve exist
On the oil return opening of first solenoid directional control valve and the connecting line of fuel tank, the rod chamber of the first accumulator and amplitude oil cylinder is connected, the
One electro connecting pressure gauge and the 6th solenoid directional control valve are successively set on the first accumulator and the connecting line of amplitude oil cylinder；Second
The connection of the oil inlet of accumulator and hydraulic control one-way valve, the second electro connecting pressure gauge and the 4th solenoid directional control valve are arranged in the second accumulation of energy
On the connecting line of device and hydraulic control one-way valve；The oil inlet of 5th solenoid directional control valve is connect with the first accumulator, and the 5th electromagnetism changes
The oil inlet of oil outlet and hydraulic control one-way valve to valve connects；The oil inlet of 7th solenoid directional control valve is connect with the second accumulator,
The oil outlet of 7th solenoid directional control valve and the rod chamber of amplitude oil cylinder connect.
3. forklift hydraulic control system as claimed in claim 1 or 2, it is characterised in that: in hydraulic pump and the first electromagnetism
The connecting line of reversal valve is equipped with the first check valve, and the oil inlet of the first check valve and the oil inlet of hydraulic pump connect, and first
The oil outlet of check valve is connect with the oil inlet of the first solenoid directional control valve；It is connected with safety valve in the oil outlet of the first check valve,
The unloading port of safety valve connect with fuel tank.
4. forklift hydraulic control system as claimed in claim 3, it is characterised in that: the first solenoid directional control valve is three four
Electric change valve, the second solenoid directional control valve, third solenoid directional control valve, the 4th solenoid directional control valve, the 5th solenoid directional control valve, the 6th
Solenoid directional control valve and the 7th solenoid directional control valve are 2/2-way solenoid directional control valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821720645.2U CN208831356U (en) | 2018-10-23 | 2018-10-23 | A kind of forklift hydraulic control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821720645.2U CN208831356U (en) | 2018-10-23 | 2018-10-23 | A kind of forklift hydraulic control system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208831356U true CN208831356U (en) | 2019-05-07 |
Family
ID=66319483
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821720645.2U Withdrawn - After Issue CN208831356U (en) | 2018-10-23 | 2018-10-23 | A kind of forklift hydraulic control system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208831356U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109139583A (en) * | 2018-10-23 | 2019-01-04 | 河南垣发专用车辆集团有限公司 | A kind of forklift hydraulic control system |
| CN111878470A (en) * | 2020-07-30 | 2020-11-03 | 三一重工股份有限公司 | Boom hydraulic system and operation equipment |
-
2018
- 2018-10-23 CN CN201821720645.2U patent/CN208831356U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109139583A (en) * | 2018-10-23 | 2019-01-04 | 河南垣发专用车辆集团有限公司 | A kind of forklift hydraulic control system |
| CN109139583B (en) * | 2018-10-23 | 2024-05-17 | 河南垣发专用车辆集团有限公司 | Hydraulic control system for forklift |
| CN111878470A (en) * | 2020-07-30 | 2020-11-03 | 三一重工股份有限公司 | Boom hydraulic system and operation equipment |
| CN111878470B (en) * | 2020-07-30 | 2022-02-18 | 三一重工股份有限公司 | Boom hydraulic system and operation equipment |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20190507 Effective date of abandoning: 20240517 |
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| AV01 | Patent right actively abandoned |
Granted publication date: 20190507 Effective date of abandoning: 20240517 |