CN201040701Y - Fork lift hydraulic driving device - Google Patents
Fork lift hydraulic driving device Download PDFInfo
- Publication number
- CN201040701Y CN201040701Y CNU2007200958285U CN200720095828U CN201040701Y CN 201040701 Y CN201040701 Y CN 201040701Y CN U2007200958285 U CNU2007200958285 U CN U2007200958285U CN 200720095828 U CN200720095828 U CN 200720095828U CN 201040701 Y CN201040701 Y CN 201040701Y
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- valve
- mouth
- bonded assembly
- oil
- pipeline
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Abstract
The utility model relates to a hydraulic pressure driving device for a forklift truck, which is characterized in that an oil tank is connected to a front oil pump and a back oil pump via filtering and cleaning devices, and an output end pipe of the back pump is connected to a lifting manual valve and an inclined manual valve, and an output end pipe of the lifting manual valve is connected to a governor valve and two hoisting cylinders, and an output end pipe of the inclined manual valve is connected to two inclined cylinders, and an output end pipe of the front oil pump is connected to a dividing valve which is provided with two output ends, and one output end of the dividing valve is connected to a steering gear whose output end is connected to a steering cylinder, and a return-oil inlet pipe of the steering cylinder is connected to the filtering and cleaning device, and an output end of the filtering and cleaning device is connected to a radiator and the oil tank, and the lifting manual valve and the inclined manual valve are serially connected between the other end of the dividing valve and the oil tank via the pipe, and a relief valve which controls system pressure are additionally arranged between the output end of the filtering and cleaning device of the steering gear and the oil tank. Thus status that pressure in return oil system is too high is decreased, and reliability of the hydraulic pressure driving device is improved, and additionally the utility model has the advantages of simple structure and easy realization.
Description
Technical field
The utility model belongs to the fork truck of handling goods, particularly relates to a kind of fork truck fluid pressure drive device.
Background technology
Generally be used for the loading and unloading transportation of harbour, goods station at present known Xiao Song FD-60 fork truck, the lift oil tank of this fork truck, dump ram and to turn to oil cylinder be by a fluid pressure drive device control.Its fluid pressure drive device is: oil pump and gear pump before the rear vehicle of fork truck is equipped with, the input end pipeline bonded assembly fil and the fuel tank of preceding oil pump and gear pump, gear pump mouth pipeline is connected with lifting hand valve and inclination hand valve, lifting hand valve mouth pipeline is connected with governor valve and two lift oil tanks, inclination hand valve mouth pipeline is connected with two dump rams, preceding oil pump mouth pipeline connects the flow divider valve that has two mouths, the mouth pipeline bonded assembly deflector of flow divider valve, deflector mouth pipeline connects one and turns to oil cylinder, deflector return opening pipeline is connected with fil, fil mouth pipeline is connected with radiator and fuel tank, by pipeline also described lifting hand valve of series connection and inclination hand valve, the mouth of preceding oil pump flow divider valve and the mouth of gear pump are respectively and go back pipeline between the fuel tank and be connected with safety valve between another mouth of flow divider valve and the fuel tank.The fluid pressure drive device of this structure; since the fluid-link steering oil return because of pipeline long and behind radiator the oil sump tank pipeline diameter less; cause each element internal pressure of oil return line system to raise; unloading overflow valve is formed back pressure; make whole hydraulic system pressure out of control; therefore fault rate is higher, faults such as oil return flexible pipe explosion that the oil pump pump shaft twisted off, turned to shake, steering swivel system, oil return fil explosion damage in use often occur, causes to shut down that repairing runs off with hydraulic oil wastes.
Summary of the invention
The utility model provides a kind of structure failure-free fork truck fluid pressure drive device more for solving the technical matters that exists in the known technology.
The technical scheme that the utility model is taked for the technical matters that exists in the solution known technology is:
A kind of fork truck fluid pressure drive device, oil pump and gear pump before comprising, input end pipeline bonded assembly fil and fuel tank with preceding oil pump and gear pump, with gear pump mouth pipeline bonded assembly lifting hand valve and inclination hand valve, with lifting hand valve mouth pipeline bonded assembly governor valve and two lift oil tanks, with two dump rams of inclination hand valve mouth pipeline bonded assembly, have the flow divider valve of two mouths with preceding oil pump mouth pipeline bonded assembly, mouth pipeline bonded assembly deflector with flow divider valve, turn to oil cylinder with one of deflector mouth pipeline bonded assembly, with deflector return opening pipeline bonded assembly fil, form with fil mouth pipeline bonded assembly radiator and fuel tank, between another mouth of flow divider valve and the fuel tank by pipeline also described lifting hand valve of series connection and inclination hand valve, before the mouth of oil pump flow divider valve and gear pump mouth respectively and go back pipeline between the fuel tank and be connected with safety valve, add the unloader valve of control system pressure between the fil mouth of described deflector and the fuel tank.
The utility model can also adopt following technical measures:
Described unloader valve is a by pass valve.
Advantage and the good effect that the utlity model has are: owing to be provided with BPO Bypass Orifice at the fil mouth of deflector, a by pass valve that is communicated with fuel tank is set at the BPO Bypass Orifice place, another road oil sump tank behind the radiator that still keeps flowing through, so not only guaranteed the operating needs of former machinery, reduced the problem of hypertonia in the return oil system again, avoided the generation of faults such as oil pump overload, fil and oil return pipe explosion, improved the reliability of fluid pressure drive device greatly, the utility model also has advantage simple in structure, that be easy to realize in addition.
Description of drawings
Fig. 1 is a hydraulic principle scheme drawing of the present utility model.
Among the figure: 1, fuel tank; 2, by pass valve; 3, fil; 4, preceding oil pump; 5, gear pump; 6, flow divider valve; 7, lifting hand valve; 8, governor valve; 9, lift oil tank; 10, shutoff valve; 11, inclination hand valve; 12, dump ram; 13, steering safety valve; 14, main safety valve; 15, deflector; 16, turn to oil cylinder; 17, fil; 18, radiator.
The specific embodiment
For further understanding summary of the invention of the present utility model, characteristics and effect, exemplify following examples now, and conjunction with figs. is described in detail as follows:
See also Fig. 1, the input end of oil pump 4 and gear pump 5 before fuel tank 1 connects by fil 3.Gear pump mouth pipeline connects lifting hand valve 7 and inclination hand valve 11.Lifting hand valve mouth pipeline connects governor valve 8 and two lift oil tanks 9 that are serially connected with shutoff valve 10, and inclination hand valve mouth pipeline connects two dump rams 12.Preceding oil pump mouth pipeline connects the flow divider valve 6 that has two mouths.A mouth pipeline of flow divider valve connects deflector 15, and deflector mouth pipeline connects one and turns to oil cylinder 16, and deflector return opening pipeline connects fil 17, and fil mouth pipeline connects radiator 18 and fuel tank 1.Between another mouth of flow divider valve 6 and the fuel tank 1 by pipeline also series connection lifting hand valve 7 and inclination hand valve 11.Before the mouth of oil pump flow divider valve and gear pump mouth respectively and go back pipeline between the fuel tank and be connected with steering safety valve 13 and main safety valve 14.In order to reduce the pressure of return oil system, between fil 17 mouths of deflector and fuel tank, add the by pass valve 2 of control system pressure, so not only guaranteed the operating needs of former machinery, reduced the problem of hypertonia in the return oil system again.
Claims (2)
1. fork truck fluid pressure drive device, oil pump and gear pump before comprising, input end pipeline bonded assembly fil and fuel tank with preceding oil pump and gear pump, with gear pump mouth pipeline bonded assembly lifting hand valve and inclination hand valve, with lifting hand valve mouth pipeline bonded assembly governor valve and two lift oil tanks, with two dump rams of inclination hand valve mouth pipeline bonded assembly, have the flow divider valve of two mouths with preceding oil pump mouth pipeline bonded assembly, mouth pipeline bonded assembly deflector with flow divider valve, turn to oil cylinder with one of deflector mouth pipeline bonded assembly, with deflector return opening pipeline bonded assembly fil, form with fil mouth pipeline bonded assembly radiator and fuel tank, between another mouth of flow divider valve and the fuel tank by pipeline also described lifting hand valve of series connection and inclination hand valve, before the mouth of oil pump flow divider valve and gear pump mouth respectively and go back pipeline between the fuel tank and be connected with safety valve, it is characterized in that: the unloader valve that adds control system pressure between the fil mouth of described deflector and the fuel tank.
2. fork truck fluid pressure drive device according to claim 1 is characterized in that: described unloader valve is a by pass valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200958285U CN201040701Y (en) | 2007-04-20 | 2007-04-20 | Fork lift hydraulic driving device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200958285U CN201040701Y (en) | 2007-04-20 | 2007-04-20 | Fork lift hydraulic driving device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201040701Y true CN201040701Y (en) | 2008-03-26 |
Family
ID=39252408
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007200958285U Expired - Fee Related CN201040701Y (en) | 2007-04-20 | 2007-04-20 | Fork lift hydraulic driving device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201040701Y (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102102687A (en) * | 2009-12-18 | 2011-06-22 | 上海凯迪克航空工程技术有限公司 | Hydraulic pressure source device |
| 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 |
| CN102295250A (en) * | 2011-08-30 | 2011-12-28 | 陈海波 | Dual pump converging energy-saving control system for hydraulic system of forklift truck |
| CN103470553A (en) * | 2013-09-10 | 2013-12-25 | 上海羽翼船舶设备有限公司 | Procession speed limiting device for anti-rolling gyroscope |
| CN104944324A (en) * | 2014-03-26 | 2015-09-30 | 株式会社丰田自动织机 | Industrial vehicle |
-
2007
- 2007-04-20 CN CNU2007200958285U patent/CN201040701Y/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102102687A (en) * | 2009-12-18 | 2011-06-22 | 上海凯迪克航空工程技术有限公司 | Hydraulic pressure source device |
| 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 |
| CN102295250A (en) * | 2011-08-30 | 2011-12-28 | 陈海波 | Dual pump converging energy-saving control system for hydraulic system of forklift truck |
| CN102295250B (en) * | 2011-08-30 | 2014-02-12 | 昆山航天智能技术有限公司 | Dual pump converging energy-saving control system for hydraulic system of forklift truck |
| CN103470553A (en) * | 2013-09-10 | 2013-12-25 | 上海羽翼船舶设备有限公司 | Procession speed limiting device for anti-rolling gyroscope |
| CN103470553B (en) * | 2013-09-10 | 2015-10-14 | 上海羽翼船舶设备有限公司 | A kind ofly subtract the precession speed limiting device shaking gyro |
| CN104944324A (en) * | 2014-03-26 | 2015-09-30 | 株式会社丰田自动织机 | Industrial vehicle |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080326 |