CN201169289Y - Forklift load sensing priority steering hydraulic system - Google Patents
Forklift load sensing priority steering hydraulic system Download PDFInfo
- Publication number
- CN201169289Y CN201169289Y CN 200820300162 CN200820300162U CN201169289Y CN 201169289 Y CN201169289 Y CN 201169289Y CN 200820300162 CN200820300162 CN 200820300162 CN 200820300162 U CN200820300162 U CN 200820300162U CN 201169289 Y CN201169289 Y CN 201169289Y
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- China
- Prior art keywords
- steering
- hydraulic system
- load sensing
- load
- pressure
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- Expired - Lifetime
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Abstract
A steering priority hydraulic system of the load sensing of a forkman is characterized in that a steering priority valve and a load sensing steering gear are orderly connected between a gear pump and a steering oil cylinder, wherein, the CF port of the steering priority valve is communicated with the P port of a load sensor; the LS port of the steering priority valve is communicated with the LS port of the load sensor; the T port of the load sensor is connected with the steering oil cylinder. The steering priority hydraulic system has the advantages that the load feedback of the load sensing steering gear can be realized; the required pressure and the required flow capacity for overcoming the temporal load are supplied to the steering priority hydraulic system; the reliable work of the steering system is ensured. In addition, a pressure signal is supplied by the steering priority hydraulic system to the steering priority valve through the load sensing steering gear; because of the pressure signal, the valve core of the steering priority valve automatically reaches a balanced state, therefore, the steering priority valve ensures that the flow capacity required by the steering priority hydraulic system is supplied to the steering priority hydraulic system according to the opening degree of the load sensing steering gear, and the effect of saving energy of the system is achieved.
Description
Technical field
The utility model relates to the preferential steering hydraulic system of a kind of fork truck load sensing.
Background technology
Tradition fork-truck steering hydraulic efficiency gear mainly adopts shown in the accompanying drawing 1, its principle has guaranteed the reliability of steering swivel system, and in order to reach this purpose: 1, deflector is in meta when steering swivel system is not worked, always there is bigger flow to get back to fuel tank by deflector, not only wasted this part flow, and cause degradation of energy, make system's heating.Just there is big flow to pass through when 2, deflector is moved a little, causes system response time too fast, fretting performance and stationarity that influence turns to.
Summary of the invention
The purpose of this utility model just provides a kind of load feedback that can realize by the load sensing deflector, offers required pressure and the flow that overcomes load this moment of steering hydraulic system, has guaranteed the steering swivel system reliable operation.It is turned to pressure-gradient control valve that a pressure signal is provided by the load sensing deflector in addition, this pressure signal makes the spool that turns to pressure-gradient control valve reach state of equilibrium automatically, guarantee that gear type pump offers the required flow of steering swivel system according to the aperture of load sensing deflector, has reached the preferential steering hydraulic device of fork truck load sensing of the energy-saving effect of system.
Solution of the present utility model is such: at gear type pump and turn to be connected with in turn between the oil cylinder and turn to pressure-gradient control valve and load sensing deflector, wherein turn to the CF mouth of pressure-gradient control valve to be communicated with the P mouth of load sensor; Turn to the LS mouth of the LS mouth connection load sensor of pressure-gradient control valve; The T mouth of load sensor is received fuel tank.
The utility model has the advantages that the load feedback that can realize, offer required pressure and the flow that overcomes load this moment of steering hydraulic system, guaranteed the steering swivel system reliable operation by the load sensing deflector.It is turned to pressure-gradient control valve that a pressure signal is provided by the load sensing deflector in addition, this pressure signal makes the spool that turns to pressure-gradient control valve reach state of equilibrium automatically, guarantee that gear type pump offers the required flow of steering swivel system according to the aperture of load sensing deflector, has reached the energy-saving effect of system.
Description of drawings
Accompanying drawing is embodiment of the present utility model.
Accompanying drawing 1 is traditional fork-truck steering hydraulic efficiency pressure system.
Accompanying drawing 2 is the utility model hydraulic schematic diagrams.
The specific embodiment
The utility model is at gear type pump 1 and turn to be connected with in turn between the oil cylinder 4 and turn to pressure-gradient control valve 2 and load sensing deflector 3, wherein turns to the CF mouth of pressure-gradient control valve 2 to be communicated with the P mouth of load sensor 3; Turn to the LS mouth of the LS mouth connection load sensor 3 of pressure-gradient control valve 2; The T mouth of load sensor 3 is received fuel tank.
This working process has following several: 1. when load sensing deflector 3 is failure to actuate, do not have signal pressure LS, turn to pressure-gradient control valve 2 spools to move to right under Δ P effect, the opening that obtains the EF passage is increased, turn down to the opening of CF passage.When the CF passage was fully closed, the oil in the enclosed cavity was got back to fuel tank by the LS mouth, and Δ P reduces to zero, turns to pressure-gradient control valve 2 spools to move to left under the spring force effect, opened a bit this passage again, repeated said process, and the spool crank motion is kept dynamical equilibrium.Nearly all like this oil all enters the EF passage, and the CF passage has only a spot of oil to pass through all the time.2. when load sensing deflector 3 was rotated, the P mouth communicated with L (or R) mouthful, and the passage of LS hydraulic fluid port and fuel tank is closed, and the passage of LS hydraulic fluid port and L (or R) is opened simultaneously.Under the effect of LS oil pressure, will turn to pressure-gradient control valve 2 spools to moving to left, the opening of CF passage is increased, the opening of EF passage reduces, and this process has guaranteed the reliability that turns to.
Claims (1)
1. preferential steering hydraulic system of fork truck load sensing, it is characterized in that at gear type pump (1) and turn to be connected with in turn between the oil cylinder (4) turning to pressure-gradient control valve (2) and load sensing deflector (3), wherein turn to the P mouth of the CF mouth connection load sensor (3) of pressure-gradient control valve (2); Turn to the LS mouth of the LS mouth connection load sensor (3) of pressure-gradient control valve (2); The T mouth of load sensor (3) is received fuel tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200820300162 CN201169289Y (en) | 2008-01-29 | 2008-01-29 | Forklift load sensing priority steering hydraulic system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200820300162 CN201169289Y (en) | 2008-01-29 | 2008-01-29 | Forklift load sensing priority steering hydraulic system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201169289Y true CN201169289Y (en) | 2008-12-24 |
Family
ID=40208341
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200820300162 Expired - Lifetime CN201169289Y (en) | 2008-01-29 | 2008-01-29 | Forklift load sensing priority steering hydraulic system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201169289Y (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102134048A (en) * | 2011-02-15 | 2011-07-27 | 安徽合力股份有限公司 | Hydraulic system of hybrid power forklift |
| CN102530780A (en) * | 2012-03-01 | 2012-07-04 | 安徽合力股份有限公司 | Hydraulic pipeline system for forklift two-section full-free gantry |
| CN102602852A (en) * | 2012-03-23 | 2012-07-25 | 三一集团有限公司 | Hydraulic hybrid stacking machine |
| CN102633213A (en) * | 2012-04-28 | 2012-08-15 | 安徽合力股份有限公司 | Energy regeneration type forklift hydraulic system |
| CN104564873A (en) * | 2013-10-24 | 2015-04-29 | 卡特彼勒（青州）有限公司 | Single-load hydraulic system and machine |
| CN104627910A (en) * | 2015-02-04 | 2015-05-20 | 阜新捷力液压科技有限公司 | Intelligent load sensing hydraulic system of electric forklift |
-
2008
- 2008-01-29 CN CN 200820300162 patent/CN201169289Y/en not_active Expired - Lifetime
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102134048A (en) * | 2011-02-15 | 2011-07-27 | 安徽合力股份有限公司 | Hydraulic system of hybrid power forklift |
| CN102134048B (en) * | 2011-02-15 | 2012-10-10 | 安徽合力股份有限公司 | Hydraulic system of hybrid power forklift |
| CN102530780A (en) * | 2012-03-01 | 2012-07-04 | 安徽合力股份有限公司 | Hydraulic pipeline system for forklift two-section full-free gantry |
| CN102602852A (en) * | 2012-03-23 | 2012-07-25 | 三一集团有限公司 | Hydraulic hybrid stacking machine |
| CN102602852B (en) * | 2012-03-23 | 2014-09-10 | 三一集团有限公司 | Hydraulic hybrid stacking machine |
| CN102633213A (en) * | 2012-04-28 | 2012-08-15 | 安徽合力股份有限公司 | Energy regeneration type forklift hydraulic system |
| CN102633213B (en) * | 2012-04-28 | 2014-10-22 | 安徽合力股份有限公司 | Energy regeneration type forklift hydraulic system |
| US9482248B2 (en) | 2012-04-28 | 2016-11-01 | Anhui Heli Co., Ltd | Energy regeneration type forklift hydraulic system |
| CN104564873A (en) * | 2013-10-24 | 2015-04-29 | 卡特彼勒（青州）有限公司 | Single-load hydraulic system and machine |
| CN104564873B (en) * | 2013-10-24 | 2018-12-21 | 卡特彼勒（青州）有限公司 | Single load hydraulic system and machine |
| CN104627910A (en) * | 2015-02-04 | 2015-05-20 | 阜新捷力液压科技有限公司 | Intelligent load sensing hydraulic system of electric forklift |
| CN104627910B (en) * | 2015-02-04 | 2017-03-22 | 阜新阜太泵业制造有限公司 | Intelligent load sensing hydraulic system of electric forklift |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Liuzhou LiuGong Fork Truck Co., Ltd. Assignor: Guangxi Liugong Machinery Co., Ltd. Contract record no.: 2010450000062 Denomination of utility model: Forklift load sensing priority steering hydraulic system Granted publication date: 20081224 License type: Exclusive License Record date: 20100830 |
|
| CX01 | Expiry of patent term |
Granted publication date: 20081224 |
|
| CX01 | Expiry of patent term |