CN203528591U - Emergency hydraulic steering system for wheel loader - Google Patents
Emergency hydraulic steering system for wheel loader Download PDFInfo
- Publication number
- CN203528591U CN203528591U CN201320633603.6U CN201320633603U CN203528591U CN 203528591 U CN203528591 U CN 203528591U CN 201320633603 U CN201320633603 U CN 201320633603U CN 203528591 U CN203528591 U CN 203528591U
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- China
- Prior art keywords
- control valve
- pressure
- gradient control
- fuel tank
- gear pump
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- Expired - Fee Related
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- Fluid-Pressure Circuits (AREA)
Abstract
The utility model discloses an emergency hydraulic steering system for a wheel loader. The emergency hydraulic steering system is characterized by comprising a steering device connected with an oil cylinder and a priority valve. A loop of the priority valve and a loop of the steering device are connected with an oil tank. Another loop of the priority valve is connected with the oil tank. An oil inlet of the priority valve is connected with the oil tank through a gear pump and a bi-directional gear pump, and a one-way valve is arranged between the gear pump and the oil inlet of the priority valve. The emergency hydraulic steering system has the advantages that when a hydraulic steering system breaks down, the inertia of a whole machine can drive the bi-directional gear pump to work, and pressure oil can be provided; the inertia of the whole machine drives the gear pump to work, the emergency steering function can be reasonable, and steering can be achieved in the operation process of the machine; the bi-directional gear pump is used as a power source, emergency steering can be achieved when the whole machine advances or retreats, and the operation is safe.
Description
Technical field
The utility model relates to the emergent steering hydraulic system of a kind of wheel type loader, belongs to loader technical field.
Background technology
Along with the outlet trend of loader product is growing, loader need meet requirement and the relevant authentications such as the use, environment, safety of different geographical, and is the most strictly and comprehensively wherein the general CE authentications of European Union member countries.For reaching CE authentication requesting, loader need possess emergent turning function.After complete machine normal direction of rotation propulsion source lost efficacy, emergent steering swivel system can provide propulsion source to realize machine turning function.
The technology path of realizing at present emergent turning function mainly contains by energy storage and motor-drive pump to be realized, but both has certain defect.If complete emergent turning test by standard-required, the required volume of energy storage is very large, be not easy to arrange on complete machine, and cost is very high; Motor-drive pump institute consuming electric power demand is also larger, if just cannot meet test requirements document equally with complete machine standard configuration storage battery.
Summary of the invention
To be solved in the utility model is the emergent shortcoming that steering hydraulic system volume is large, power consumption is large of existing wheel type loader.
In order to address the above problem, the utility model provides a kind of wheel type loader steering hydraulic system of meeting an urgent need, and it is characterized in that, comprise the deflector being connected with oil cylinder, deflector is connected with pressure-gradient control valve; The loop of pressure-gradient control valve, deflector is connected with fuel tank; Another loop, road of pressure-gradient control valve is connected with fuel tank; The oil inlet of pressure-gradient control valve is connected with fuel tank by gear type pump, double-direction gearpump respectively, between gear type pump and the oil inlet of pressure-gradient control valve, is provided with check valve.
Preferably, the loop of described pressure-gradient control valve, deflector is connected with fuel tank by return filter one after connecting.
Preferably, another loop, road of described pressure-gradient control valve is connected with fuel tank by radiator, return filter two successively.
Preferably, between described gear type pump and fuel tank, be provided with oil absorption filter.
The utility model has the advantage of: 1. when hydrostatic steering system breaks down, can drive double-direction gearpump to work by complete machine inertia, pressure oil is provided; 2. by complete machine inertia driven gear pump work, emergent turning function is more collaborated, as long as machine can be realized and turning in operational process; 3. adopt double-direction gearpump as propulsion source, complete machine moves forward and backward and can realize emergent turning to, safer.
Accompanying drawing explanation
Fig. 1 is the emergent steering hydraulic system of wheel type loader.
The specific embodiment
For the utility model is become apparent, hereby with preferred embodiment, and coordinate accompanying drawing to be described in detail below.
Embodiment
As shown in Figure 1, for the emergent steering hydraulic system structural representation of wheel type loader, comprise the deflector 4 being connected with oil cylinder 5, deflector 4 is connected with pressure-gradient control valve 3.After connecting, the loop of pressure-gradient control valve 3, deflector 4 is connected with fuel tank 1 by return filter 1.Another loop, road of pressure-gradient control valve 3 is connected with fuel tank 1 by radiator 9, return filter 2 10 successively.The oil inlet of pressure-gradient control valve 3 is connected with fuel tank 1 by gear type pump 7, double-direction gearpump 8 respectively, between gear type pump 7 and the oil inlet of pressure-gradient control valve 3, is provided with check valve 6.Between gear type pump 7 and fuel tank 1, be provided with oil absorption filter 11.
Under normal circumstances, complete machine provides pressure oil by gear type pump 7, realizes normal direction of rotation function.When gear type pump 7 cannot just produce work, double-direction gearpump 8 is driven by output shaft of gear-box by complete machine inertia, pressure oil output, the hydraulic bridge that check valve forms can guarantee that double-direction gearpump 8 normally works, pressure oil enters deflector 4 through pressure-gradient control valve 3, by operation deflector 4, can control steering cylinder 5 actions, emergent turning to about implementing.Check valve 6 can prevent that fluid from flowing backwards.
Claims (4)
1. the emergent steering hydraulic system of wheel type loader, is characterized in that, comprise the deflector (4) being connected with oil cylinder (5), deflector (4) is connected with pressure-gradient control valve (3); The loop of pressure-gradient control valve (3), deflector (4) is connected with fuel tank (1); Another loop, road of pressure-gradient control valve (3) is connected with fuel tank (1); The oil inlet of pressure-gradient control valve (3) is connected with fuel tank (1) by gear type pump (7), double-direction gearpump (8) respectively, between gear type pump (7) and the oil inlet of pressure-gradient control valve (3), is provided with check valve (6).
2. the emergent steering hydraulic system of a kind of wheel type loader as claimed in claim 1, is characterized in that, after the loop of described pressure-gradient control valve (3), deflector (4) connects, by return filter one (2), is connected with fuel tank (1).
3. the emergent steering hydraulic system of a kind of wheel type loader as claimed in claim 1, is characterized in that, another loop, road of described pressure-gradient control valve (3) is connected with fuel tank (1) by radiator (9), return filter two (10) successively.
4. the emergent steering hydraulic system of a kind of wheel type loader as claimed in claim 1, is characterized in that, between described gear type pump (7) and fuel tank (1), is provided with oil absorption filter (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320633603.6U CN203528591U (en) | 2013-10-14 | 2013-10-14 | Emergency hydraulic steering system for wheel loader |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320633603.6U CN203528591U (en) | 2013-10-14 | 2013-10-14 | Emergency hydraulic steering system for wheel loader |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203528591U true CN203528591U (en) | 2014-04-09 |
Family
ID=50414836
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320633603.6U Expired - Fee Related CN203528591U (en) | 2013-10-14 | 2013-10-14 | Emergency hydraulic steering system for wheel loader |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203528591U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106494500A (en) * | 2016-10-21 | 2017-03-15 | 贵州詹阳动力重工有限公司 | A kind of emergent steering, engineering machinery |
| CN106966339A (en) * | 2017-05-10 | 2017-07-21 | 安徽宇锋仓储设备有限公司 | A kind of electri forklift steering hydraulic system |
-
2013
- 2013-10-14 CN CN201320633603.6U patent/CN203528591U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106494500A (en) * | 2016-10-21 | 2017-03-15 | 贵州詹阳动力重工有限公司 | A kind of emergent steering, engineering machinery |
| CN106494500B (en) * | 2016-10-21 | 2018-10-26 | 贵州詹阳动力重工有限公司 | A kind of emergent steering, engineering machinery |
| CN106966339A (en) * | 2017-05-10 | 2017-07-21 | 安徽宇锋仓储设备有限公司 | A kind of electri forklift steering hydraulic system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140409 Termination date: 20151014 |
|
| EXPY | Termination of patent right or utility model |