CN109139583A - A kind of forklift hydraulic control system - Google Patents
A kind of forklift hydraulic control system Download PDFInfo
- Publication number
- CN109139583A CN109139583A CN201811239648.9A CN201811239648A CN109139583A CN 109139583 A CN109139583 A CN 109139583A CN 201811239648 A CN201811239648 A CN 201811239648A CN 109139583 A CN109139583 A CN 109139583A
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- Prior art keywords
- 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 99
- 239000010720 hydraulic oil Substances 0.000 description 19
- 239000012530 fluid Substances 0.000 description 2
- 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
- 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
- 239000013589 supplement Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/08—Servomotor systems without provision for follow-up action; Circuits therefor with only one servomotor
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B1/00—Installations or systems with accumulators; Supply reservoir or sump assemblies
- F15B1/02—Installations or systems with accumulators
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/04—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- 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 present invention 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 present invention 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.
Summary of the invention
It is an object of the invention to: a kind of forklift hydraulic control system is provided, solve the amplitude oil cylinder of forklift because
The technical issues of weight of the components such as cantilever crane, the inserting mechanism of forklift and cargo slowly falls.
The technical scheme adopted by the invention is as follows:
A kind of forklift hydraulic control system, including fuel tank, hydraulic pump, the first solenoid directional control valve, the second solenoid directional control valve,
One 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 and
The oil inlet of one solenoid directional control valve connects, and the oil return opening of the first solenoid directional control valve is connect with fuel tank, and the of the first solenoid directional control valve
One oil outlet is connect with the oil inlet of the first speed governing valve, the second oil outlet of the first solenoid directional control valve and the rod chamber of amplitude oil cylinder
The oil inlet of connection, the oil outlet of the 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 is connect with the oil inlet of hydraulic control one-way valve respectively, hydraulic control list
The rodless cavity of oil outlet and amplitude oil cylinder to valve connects, and the hydraulic control mouth of hydraulic control one-way valve and the rod chamber of amplitude oil cylinder connect,
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 present invention 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 is kept away
Exempt from amplitude oil cylinder because the weight of the cantilever crane of forklift, the inserting components such as mechanism and cargo slowly falls, third electro connecting pressure gauge
For detecting the pressure of amplitude oil cylinder rodless cavity, the first speed governing valve and the second speed control valves series, and at the first speed governing valve simultaneously
Join the second solenoid directional control valve, makes for realizing the balance switching of two kinds of speed suitable for the cargo of forklift inserting different weight
Inserting is steady to carry out and improves working efficiency；First accumulator and the second accumulator are used to storage energy, forklift load
When walking, when road conditions are poor, the first accumulator and the second accumulator are respectively that the rodless cavity of amplitude oil cylinder and its rod chamber supplement
Hydraulic oil reduces the vibration of amplitude oil cylinder；First electro connecting pressure gauge is used to detect the pressure of the first accumulator, the second electric contact
Pressure gauge is used to detect the pressure of the second accumulator.
Detailed description of the invention
Fig. 1 is the structural diagram of the present invention.
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 present invention 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 stabilized
Pressure avoids amplitude oil cylinder 15 from slowly falling because of the weight of the components such as cantilever crane, the inserting mechanism of forklift and cargo.Forklift is used
The motor of the working principle forklift of hydraulic control system is that hydraulic pump 2 provides power, and hydraulic pump 2 is by the hydraulic oil in fuel tank 1
It pumps out, when amplitude oil cylinder 15 rises, the left position of the first solenoid directional control valve 6 obtains electric, is switched to the work of its left position, and hydraulic oil is from the
One check valve 3 flows to the first solenoid directional control valve 6, and hydraulic oil is flowed out from the first oil outlet of the first solenoid directional control valve 6, when inserting
When cargo 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, by the
The control of two speed governing valves 9 enters the flow of 15 rodless cavity of amplitude oil cylinder, and flow is small, and speed is slow, and hydraulic oil enters from the second speed governing valve 9
Hydraulic control one-way valve 13 drives the hydraulic stem of amplitude oil cylinder 15 to stretch out subsequently into the rodless cavity of amplitude oil cylinder 15, makes to insert mechanism
Steady to carry out, when the cargo of inserting is lighter, the right position of the second solenoid directional control valve 19 obtains electric, is switched to right position work, the second electromagnetism
Reversal 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, hydraulic oil
Enter hydraulic control one-way valve 13 from the first speed governing valve 7, subsequently into the rodless cavity of amplitude oil cylinder 15, drives the hydraulic of amplitude oil cylinder 15
Bar stretches out, and carries out inserting mechanism steadily, improves working efficiency；The right position of 6th solenoid directional control valve 20 obtain it is electric, be switched to its right side
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, third electricity
Magnetic reversal valve 5 disconnects, and the hydraulic oil of 15 rod chamber of amplitude oil cylinder enters the first accumulator 12 by the 6th solenoid directional control valve 20, the
One electro connecting pressure gauge 10 detects the pressure of the first accumulator 12, when reaching the upper limit value of the first accumulator 12, the 6th in time
The right position of 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 solenoid directional control valve 5
Right position obtain electric, be switched to its right position work, third solenoid directional control valve 5 is connected, and the hydraulic oil of 15 rod chamber of amplitude oil cylinder is through the
One 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 obtains electric, is switched to its right position work, and hydraulic oil flows to the first solenoid directional control valve 6 from the first check valve 3, and hydraulic oil is from first
Second oil outlet of 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 enter, control hydraulic control one-way valve 13 is connected, and the hydraulic oil of 15 rodless cavity of amplitude oil cylinder is flowed out from hydraulic control one-way valve 13,
The left position of 4th solenoid directional control valve 8 obtains electric, the 4th solenoid directional control valve 8 connection, the right position power-off of third solenoid directional control valve 5, switching
It works to its left position, 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
The second accumulator 16 is flowed to, 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, related fluid in the present invention
It presses and is connected between element by hydraulic tube.
Above-described embodiment is the description of the invention, is not limitation of the invention, after any pair of simple transformation of the present invention
Scheme all belong to the scope of protection of the present invention.
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 |
|---|---|---|---|
| CN201811239648.9A CN109139583B (en) | 2018-10-23 | 2018-10-23 | Hydraulic control system for forklift |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811239648.9A CN109139583B (en) | 2018-10-23 | 2018-10-23 | Hydraulic control system for forklift |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109139583A true CN109139583A (en) | 2019-01-04 |
| CN109139583B CN109139583B (en) | 2024-05-17 |
Family
ID=64809235
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811239648.9A Active CN109139583B (en) | 2018-10-23 | 2018-10-23 | Hydraulic control system for forklift |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109139583B (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110905872A (en) * | 2019-11-15 | 2020-03-24 | 湖北航天技术研究院总体设计所 | Double-cylinder linkage hydraulic circuit based on control over energy accumulator |
| CN111776157A (en) * | 2020-05-29 | 2020-10-16 | 武汉船用机械有限责任公司 | Small ship vibration damping system |
| CN112499528A (en) * | 2020-11-05 | 2021-03-16 | 鸿程电子工业(南通)有限公司 | Hydraulic system for lifting oil cylinder of forklift |
| CN112554251A (en) * | 2020-11-05 | 2021-03-26 | 鸿程电子工业(南通)有限公司 | Digging machine |
| CN113606218A (en) * | 2021-08-13 | 2021-11-05 | 安徽德鸿机件制造有限公司 | Truck cab hydraulic oil cylinder |
| CN113958542A (en) * | 2021-12-06 | 2022-01-21 | 太原理工大学 | Hydraulic stacker crane clamping jaw hydraulic system |
| CN114183409A (en) * | 2021-12-15 | 2022-03-15 | 浙江微流纳米生物技术有限公司 | High-pressure nanometer homogenizer with multiple energy accumulators for stabilizing oil pressure |
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