CN106995197A - A kind of fork truck raise-lower hydraulic control method - Google Patents
A kind of fork truck raise-lower hydraulic control method Download PDFInfo
- Publication number
- CN106995197A CN106995197A CN201710326059.3A CN201710326059A CN106995197A CN 106995197 A CN106995197 A CN 106995197A CN 201710326059 A CN201710326059 A CN 201710326059A CN 106995197 A CN106995197 A CN 106995197A
- Authority
- CN
- China
- Prior art keywords
- hydraulic
- variable displacement
- constant pressure
- displacement pump
- valve
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
- B66F9/00—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes
- B66F9/06—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes movable, with their loads, on wheels or the like, e.g. fork-lift trucks
- B66F9/075—Constructional features or details
- B66F9/20—Means for actuating or controlling masts, platforms, or forks
- B66F9/22—Hydraulic devices or systems
-
- 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
- F15B13/06—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with two or more servomotors
-
- 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
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
- F15B21/14—Energy-recuperation means
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Chemical & Material Sciences (AREA)
- Transportation (AREA)
- Structural Engineering (AREA)
- Analytical Chemistry (AREA)
- Combustion & Propulsion (AREA)
- Civil Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Forklifts And Lifting Vehicles (AREA)
Abstract
The invention discloses a kind of fork truck raise-lower hydraulic control method, during lifting heavy, the motor in fuel reserve tank drives constant pressure variable displacement pump that hydraulic oil is entered into hydraulic cylinder by the right position of reversal valve, completes the lifting of weight；When weight declines, reversal valve is in middle position, and hydraulic oil enters the oil inlet of constant pressure variable displacement pump from hydraulic cylinder by regeneration valve, and the motor that drive and its of constant pressure variable displacement pump are connected generates electricity, and by electrical power storage into battery；The hydraulic system structure that this method is used is simple, and easy to operate, fault rate is low.And hydraulic energy can be converted into electrical power storage when weight declines, therefore the utilization rate of energy is improved, save use cost.
Description
Technical field
The present invention relates to truck hydraulic control system technical field, more particularly to fork truck raise-lower hydraulic control method.
Background technology
Electri forklift refers to the fork truck that operation is carried out with electricity, and most of is all for battery-operated.Its effect is energy
Limited electrical power storage is got up, the electric energy of storage is used for driving hydraulic pump etc..At present, the electri forklift of prior art is in lifting
Battery provides electric energy for motor during weight, and motor drives hydraulic pump to be operated, and the hydraulic energy when weight declines
Do not utilize reasonably, cause the waste of ability.
The content of the invention
The fork truck generated electricity the technical problem to be solved in the present invention is to provide a kind of hydraulic energy by when declining lifts liquid
Press control method.
In order to solve the above-mentioned technical problem, the technical scheme is that：A kind of fork truck raise-lower hydraulic control method, lifting
During weight, the motor in fuel reserve tank drives constant pressure variable displacement pump that hydraulic oil is entered into hydraulic cylinder by the right position of reversal valve, completes
The lifting of weight；When weight declines, reversal valve is in middle position, and hydraulic oil enters constant-pressure variable from hydraulic cylinder by regeneration valve
The oil inlet of pump, the motor that drive and its of constant pressure variable displacement pump are connected generates electricity, and by electrical power storage into battery.
Further, being provided between constant pressure variable displacement pump and reversal valve prevents that hydraulic oil passes through reversal valve when weight from declining
Return to the first check valve of fuel reserve tank.
Further, the first overflow valve is provided with the oil-out of constant pressure variable displacement pump.
Further, the second overflow for adjusting lifting pressure is provided between the reversal valve and the hydraulic cylinder
Valve.
Further, it is provided with oil filter on the oil-out of first overflow valve.
Further, being provided with the oil inlet of the constant pressure variable displacement pump prevents hydraulic oil to be flowed into fuel reserve tank from regeneration valve
In the second check valve.
Using having the beneficial effect that the above-mentioned technical proposal present invention is obtained：The hydraulic system structure that this method is used is simple,
Easy to operate, fault rate is low.And hydraulic energy can be converted into electrical power storage when weight declines, therefore improve energy
The utilization rate of amount, has saved use cost.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is the accompanying drawing used required in technology description to be briefly described, it should be apparent that, drawings in the following description are only this
Some embodiments of invention, for those of ordinary skill in the art, without having to pay creative labor, may be used also
To obtain other accompanying drawings according to these accompanying drawings.
Fig. 1 is the structural representation for the hydraulic system that the inventive method is used.
In figure：1- fuel reserve tanks, 2- motor, 3- constant pressure variable displacement pumps, 4- reversal valves, 5- hydraulic cylinders, 6- regeneration valves, 7- first
Check valve, the overflow valves of 8- first, the overflow valves of 9- second, 10- oil filters, the check valves of 11- second.
Embodiment
The embodiment to the present invention is described further below in conjunction with the accompanying drawings.Herein it should be noted that for
The explanation of these embodiments is used to help understand the present invention, but does not constitute limitation of the invention.In addition, disclosed below
As long as each of the invention embodiment in involved technical characteristic do not constitute conflict each other and can just be mutually combined.
The present invention is further described with reference to accompanying drawing, person of ordinary skill in the field is preferably implemented the present invention,
A kind of fork truck raise-lower hydraulic control method of the embodiment of the present invention, during lifting heavy, the motor 2 in fuel reserve tank 1 drives constant pressure to become
Measure pump 3 and hydraulic oil is entered into hydraulic cylinder 5 by the right position of reversal valve 4, complete the lifting of weight；When weight declines, at reversal valve 4
In middle position, hydraulic oil enters the oil inlet of constant pressure variable displacement pump 3, the band of constant pressure variable displacement pump 3 from hydraulic cylinder 5 by regeneration valve 6
The dynamic motor 2 being connected with it generates electricity, and by electrical power storage into battery.
The embodiment of the present invention is provided with hydraulic oil when preventing that weight from declining between constant pressure variable displacement pump 3 and reversal valve 4 and passed through
Reversal valve 4 returns to the first check valve 7 of fuel reserve tank 1；The first overflow valve 8 is provided with the oil-out of constant pressure variable displacement pump 3；Changing
To the second overflow valve 9 being provided between valve 4 and hydraulic cylinder 5 for adjusting lifting pressure；On the oil-out of the first overflow valve 8
It is provided with oil filter 10；Being provided with the oil inlet of constant pressure variable displacement pump 3 prevents hydraulic oil to be flowed into from regeneration valve 6 in fuel reserve tank 1
The second check valve 11.
The hydraulic system structure that this method of the embodiment of the present invention is used is simple, and easy to operate, fault rate is low.And in weight
Hydraulic energy can be converted into electrical power storage during decline, therefore improve the utilization rate of energy, use cost has been saved.
Embodiments of the present invention are explained in detail above in association with accompanying drawing, but the invention is not restricted to described implementation
Mode.For a person skilled in the art, in the case where not departing from the principle of the invention and spirit, to these embodiments
A variety of change, modification, replacement and modification are carried out, are still fallen within protection scope of the present invention.
Claims (6)
1. a kind of fork truck raise-lower hydraulic control method, it is characterised in that：
During lifting heavy, the motor in fuel reserve tank drives constant pressure variable displacement pump that hydraulic oil is entered into hydraulic pressure by the right position of reversal valve
Cylinder, completes the lifting of weight；
When weight declines, reversal valve is in middle position, and hydraulic oil enters entering for constant pressure variable displacement pump from hydraulic cylinder by regeneration valve
Hydraulic fluid port, the motor that drive and its of constant pressure variable displacement pump are connected generates electricity, and by electrical power storage into battery.
2. fork truck raise-lower hydraulic control method according to claim 1, it is characterised in that：Constant pressure variable displacement pump and reversal valve it
Between be provided with the first check valve for preventing hydraulic oil when weight declines from returning to fuel reserve tank by reversal valve.
3. fork truck raise-lower hydraulic control method according to claim 2, it is characterised in that：On the oil-out of constant pressure variable displacement pump
It is provided with the first overflow valve.
4. fork truck raise-lower hydraulic control method according to claim 2, it is characterised in that：In the reversal valve and the hydraulic pressure
The second overflow valve for adjusting lifting pressure is provided between cylinder.
5. fork truck raise-lower hydraulic control method according to claim 3, it is characterised in that：In the fuel-displaced of first overflow valve
Oil filter is provided with mouthful.
6. fork truck raise-lower hydraulic control method according to claim 1, it is characterised in that：The oil inlet of the constant pressure variable displacement pump
On be provided with prevent hydraulic oil from regeneration valve be flowed into fuel reserve tank in the second check valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710326059.3A CN106995197A (en) | 2017-05-10 | 2017-05-10 | A kind of fork truck raise-lower hydraulic control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710326059.3A CN106995197A (en) | 2017-05-10 | 2017-05-10 | A kind of fork truck raise-lower hydraulic control method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106995197A true CN106995197A (en) | 2017-08-01 |
Family
ID=59435254
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710326059.3A Pending CN106995197A (en) | 2017-05-10 | 2017-05-10 | A kind of fork truck raise-lower hydraulic control method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106995197A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102134047A (en) * | 2011-02-15 | 2011-07-27 | 安徽合力股份有限公司 | Energy-saving hydraulic system of electric forklift |
| CN102616705A (en) * | 2012-03-27 | 2012-08-01 | 安徽合力股份有限公司 | Energy-saving forklift hydraulic system with energy recovery function |
| CN102628465A (en) * | 2012-04-17 | 2012-08-08 | 安徽合力股份有限公司 | Energy recovery type lifting hydraulic system for hoisting and conveying machine |
| CN202575895U (en) * | 2012-04-28 | 2012-12-05 | 安徽合力股份有限公司 | Energy regeneration type hydraulic system for forklift |
| US20130283776A1 (en) * | 2010-12-28 | 2013-10-31 | Sunward Intelligent Equipment Co., Ltd. | Energy-recovery generation system for handling and carrying electric vehicle |
-
2017
- 2017-05-10 CN CN201710326059.3A patent/CN106995197A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20130283776A1 (en) * | 2010-12-28 | 2013-10-31 | Sunward Intelligent Equipment Co., Ltd. | Energy-recovery generation system for handling and carrying electric vehicle |
| CN102134047A (en) * | 2011-02-15 | 2011-07-27 | 安徽合力股份有限公司 | Energy-saving hydraulic system of electric forklift |
| CN102616705A (en) * | 2012-03-27 | 2012-08-01 | 安徽合力股份有限公司 | Energy-saving forklift hydraulic system with energy recovery function |
| CN102628465A (en) * | 2012-04-17 | 2012-08-08 | 安徽合力股份有限公司 | Energy recovery type lifting hydraulic system for hoisting and conveying machine |
| CN202575895U (en) * | 2012-04-28 | 2012-12-05 | 安徽合力股份有限公司 | Energy regeneration type hydraulic system for forklift |
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| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20170801 |
|
| RJ01 | Rejection of invention patent application after publication |