CN107472358A - Wheel loader is met an urgent need steering hydraulic system - Google Patents
Wheel loader is met an urgent need steering hydraulic system Download PDFInfo
- Publication number
- CN107472358A CN107472358A CN201710711610.6A CN201710711610A CN107472358A CN 107472358 A CN107472358 A CN 107472358A CN 201710711610 A CN201710711610 A CN 201710711610A CN 107472358 A CN107472358 A CN 107472358A
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- CN
- China
- Prior art keywords
- mouths
- steering gear
- steering
- hydraulic system
- pressure
- 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.)
- Granted
Links
- 239000002828 fuel tank Substances 0.000 claims abstract description 17
- 230000007812 deficiency Effects 0.000 abstract description 3
- 239000000446 fuel Substances 0.000 abstract description 3
- 238000010276 construction Methods 0.000 abstract description 2
- 230000035484 reaction time Effects 0.000 abstract description 2
- 230000005520 electrodynamics Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D5/00—Power-assisted or power-driven steering
- B62D5/06—Power-assisted or power-driven steering fluid, i.e. using a pressurised fluid for most or all the force required for steering a vehicle
- B62D5/07—Supply of pressurised fluid for steering also supplying other consumers ; control thereof
- B62D5/075—Supply of pressurised fluid for steering also supplying other consumers ; control thereof using priority valves
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D5/00—Power-assisted or power-driven steering
- B62D5/06—Power-assisted or power-driven steering fluid, i.e. using a pressurised fluid for most or all the force required for steering a vehicle
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D5/00—Power-assisted or power-driven steering
- B62D5/06—Power-assisted or power-driven steering fluid, i.e. using a pressurised fluid for most or all the force required for steering a vehicle
- B62D5/30—Safety devices, e.g. alternate emergency power supply or transmission means to ensure steering upon failure of the primary steering means
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Power Steering Mechanism (AREA)
Abstract
The invention discloses a kind of emergent steering hydraulic system of wheel loader, including steering gear, the A mouths and B mouths of steering gear couple with two oil cylinders respectively, the P mouths of steering gear couple with pressure-gradient control valve, the loop of pressure-gradient control valve couples with fuel tank, and the T mouths of steering gear couple with fuel tank, it is characterised in that, pipeline between the P mouths and pressure-gradient control valve of described steering gear couples with one end of check valve, and the other end of check valve couples with the T mouths of steering gear.The advantage of the invention is that：Power unit need not be additionally provided, it is only necessary to increase a repairing passage newly in general steering hydraulic system, it is simple in construction, it is easy to arrange in complete machine, relative to the emergent steering hydraulic system of mesh first two routine, greatly reduces cost；In dynamic failure or fuel feeding deficiency, steering gear can automatically switch to manual pump, and repairing passage is automatically turned on, without extra manipulation of switches, without the extra reaction time, do not influenceed by remaining factor, more securely and reliably.
Description
Technical field
The present invention relates to a kind of emergent steering hydraulic system of wheel loader, belong to loading machine technical field.
Background technology
Wheel loader is a kind of wide variety of engineering machinery, and loading machine is when usually working, the hydraulic pressure that is turned to
System is as shown in Figure 3.But in wheel loader application process, it is possible to be used in various dangerous working conditions.In loading machine
In traveling process, if engine, because certain reason runs out of steam suddenly, steering meeting failure is very serious so as to cause
Consequence., still can be according to phase after engine runs out of steam in order to prevent the generation of the problem, it is necessary to there is set of system
Pass standard ensures the emergent turning function of loading machine.
Realizing the technology path of the emergent turning function of wheel loader at present mainly has two kinds：
A kind of emergent steering hydraulic system of routine is realized by increasing accumulator 10 in common hydraulic system
It is emergent to turn to：As shown in figure 1, gear pump 4 couples pressure-gradient control valve 5, pressure-gradient control valve 5 is connected couples accumulator 10 after check valve 6 all the way, one
Road couples steering gear 7, and steering gear 7 couples oil cylinder 8.In use, accumulator 10 is used as emergent steering power source, when the nothing of gear pump 4
During method pressure oil output, by steering gear 7, oil cylinder 8 is controlled, implements emergent turn to.The shortcomings that system is：As that need to reach
To the emergent turning function of standard requirement, the volume of accumulator 10 is very big, is not easy to arrange in complete machine, and need to synchronously configure complete
Hydraulic pressure wet braking, cost are higher.
Another conventional emergent steering hydraulic system is realized by increasing electrodynamic pump 9 in common hydraulic system
It is emergent to turn to：As shown in Fig. 2 gear pump 4 couples pressure-gradient control valve 5, pressure-gradient control valve 5 couples steering gear 7, connection of circuit fuel tank 1, steering gear
7 connection oil cylinders 8, the connection of circuit fuel tank 1 of steering gear 7.Electrodynamic pump 9 is in parallel with gear pump 4, and in electrodynamic pump 9 and gear pump 4
Check valve is directly arranged in series in pipeline, by stop valve controlling switch, is played a protective role.When working properly, gear pump 4 carries
For pressure oil for turning to, when running out of steam or being short of power for some reason, stop valve is controlled manually, opens electrodynamic pump 9, there is provided pressure
Oil supply racing to.The shortcomings that system is：Emergent turning function as that need to reach standard requirement, institute's consuming electric power demand is larger,
Complete machine standard configuration storage battery can not be used, separately configuring storage battery, then cost is very high, and difficulty in arrangement, electrodynamic pump 9 need to control manually,
Material time can be wasted when urgent, and when being run out of steam caused by electric fault, electrodynamic pump 9 may sync fail
, there is potential safety hazard.
The content of the invention
The technical problem to be solved in the present invention is：Provide it is a kind of it is simple in construction, be easy to arrange, reduce cost, safety can
The wheel loader that leans on is met an urgent need steering hydraulic system, is solved existing wheel loader and is met an urgent need that steering is with high costs, space
Difficult arrangement, there is the problem of potential safety hazard.
In order to solve the above-mentioned technical problem, the technical scheme is that providing a kind of emergent steering liquid of wheel loader
Pressure system, including steering gear, the A mouths and B mouths of steering gear couple with two oil cylinders respectively, and the P mouths of steering gear couple with pressure-gradient control valve,
The loop of pressure-gradient control valve couples with fuel tank, and the T mouths of steering gear couple with fuel tank, it is characterised in that the P mouths of described steering gear with it is excellent
Pipeline between first valve couples with one end of check valve, and the other end of check valve couples with the T mouths of steering gear.
Preferably, described steering gear is Full hydraulic steering gear.
Preferably, the loop of described steering gear and the loop of oil cylinder are in parallel.
Preferably, coupled between the T mouths and fuel tank of described steering gear by return oil filter, the oil inlet of pressure-gradient control valve leads to
Cross gear pump with fuel tank to couple, coupled between gear pump and fuel tank by oil-suction oil filter.
The advantage of the invention is that：
1st, power unit need not be additionally provided, it is only necessary to increase a repairing passage, knot newly in general steering hydraulic system
Structure is simple, is easy to arrange in complete machine, relative to the emergent steering hydraulic system of mesh first two routine, greatly reduces cost；
2nd, in dynamic failure or fuel feeding deficiency, steering gear can automatically switch to manual pump, and repairing passage automatically turns on, this
When the turning function of complete machine can be realized by the power that operator inputs to steering wheel, without extra manipulation of switches, without extra
In the reaction time, do not influenceed by remaining factor, more securely and reliably.
Brief description of the drawings
Fig. 1 is a kind of emergent steering hydraulic system schematic diagram of routine；
Fig. 2 is another conventional emergent steering hydraulic system schematic diagram；
Fig. 3 is a kind of common steering hydraulic system schematic diagram of loading machine；
Fig. 4 is a kind of emergent steering hydraulic system schematic diagram of wheel loader.
Embodiment
To become apparent the present invention, hereby with preferred embodiment, and accompanying drawing is coordinated to be described in detail below.
The present invention is a kind of emergent steering hydraulic system of wheel loader, as shown in figure 4, it includes steering gear 7, steering gear
7 A mouths and B mouths couples with two oil cylinders 8 respectively, and the P mouths of steering gear 7 couple with pressure-gradient control valve 5, loop and the fuel tank 1 of pressure-gradient control valve 5
Connection, the loop of steering gear 7 is in parallel with the loop of oil cylinder 8, and two-way is divided into behind interflow, couples all the way with the T mouths of steering gear 7, turns
Fuel tank 1 is coupled by return oil filter 3 to the T mouths of device 7, another way couples with the P mouths of steering gear 7 and sets check valve 6, unidirectionally
Between the P mouths and pressure-gradient control valve 5 of steering gear 7, the other end of check valve 6 couples with the T mouths of steering gear 7 for one end of valve 6, i.e., single
The both ends of overflow valve are connected in parallel on to valve 6, the T mouths with steering gear 7, P mouths couple respectively at the both ends of overflow valve, the oil-feed of pressure-gradient control valve 5
Mouth is coupled by gear pump 4 with fuel tank 1, is coupled between gear pump 4 and fuel tank 1 by oil-suction oil filter 2.Wherein, steering gear 7 is
Full hydraulic steering gear.
Two groups of combination valve blocks are provided between the A mouths and B mouths and two oil cylinders 8 of steering gear 7, the both ends of every group of combination valve block are simultaneously
First check valve is associated with, every group of combination valve includes overflow valve and Fill valve, for the impact from overload pressure.Steering gear
Second check valve is in series between 7 P mouths and pressure-gradient control valve 5, the oil inlet of the second check valve couples two-way, joined all the way respectively
The overflow valve one end coupled with the T mouths of steering gear 7, P mouths is connect, another way couples one end of the check valve 6 in parallel with the overflow valve.
Under normal circumstances, complete machine provides pressure oil by gear pump 4, by pressure-gradient control valve 5, by all-hydraulic turn of cycloid rotary valve
To device control cylinder 8, normal direction of rotation function is realized.
When gear pump 4 just can not produce work, i.e. dynamic failure or during fuel feeding deficiency, Full hydraulic steering gear
Manual pump can be automatically switched to, and check valve 6 automatically turns in pipeline, repairing passage turn on automatically, now passes through operator
Pressure oil is produced to the power of steering wheel input, and is output to oil cylinder 8, realizes emergent turning function.
Claims (4)
- The steering hydraulic system 1. a kind of wheel loader is met an urgent need, including steering gear (7), the A mouths and B mouths of steering gear (7) respectively with Two oil cylinder (8) connections, the P mouths of steering gear (7) couple with pressure-gradient control valve (5), and the loop of pressure-gradient control valve (5) couples with fuel tank (1), turns Couple to the T mouths of device (7) with fuel tank (1), it is characterised in that the pipe between the P mouths and pressure-gradient control valve (5) of described steering gear (7) Road couples with the one end of check valve (6), and the other end of check valve (6) couples with the T mouths of steering gear (7).
- The steering hydraulic system 2. a kind of wheel loader as claimed in claim 1 is met an urgent need, it is characterised in that described steering gear (7) it is Full hydraulic steering gear.
- The steering hydraulic system 3. a kind of wheel loader as claimed in claim 1 is met an urgent need, it is characterised in that described steering gear (7) loop is in parallel with the loop of oil cylinder (8).
- The steering hydraulic system 4. a kind of wheel loader as claimed in claim 1 is met an urgent need, it is characterised in that described steering gear (7) coupled between T mouths and fuel tank (1) by return oil filter (3), the oil inlet of pressure-gradient control valve (5) passes through gear pump (4) and oil Case (1) couples, and is coupled between gear pump (4) and fuel tank (1) by oil-suction oil filter (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710711610.6A CN107472358B (en) | 2017-08-18 | 2017-08-18 | Emergency steering hydraulic system of wheel loader |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710711610.6A CN107472358B (en) | 2017-08-18 | 2017-08-18 | Emergency steering hydraulic system of wheel loader |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107472358A true CN107472358A (en) | 2017-12-15 |
| CN107472358B CN107472358B (en) | 2023-12-15 |
Family
ID=60601513
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710711610.6A Active CN107472358B (en) | 2017-08-18 | 2017-08-18 | Emergency steering hydraulic system of wheel loader |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107472358B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108583682A (en) * | 2018-05-22 | 2018-09-28 | 中冶宝钢技术服务有限公司 | Emergency vehicle steering |
| CN108995707A (en) * | 2018-08-29 | 2018-12-14 | 中国重汽集团柳州运力科迪亚克机械有限责任公司 | Snow sweeper emergency hydraulic steering |
| CN114590314A (en) * | 2022-03-22 | 2022-06-07 | 三一汽车起重机械有限公司 | Emergency steering system, chassis and operation machine |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003118613A (en) * | 2001-10-12 | 2003-04-23 | Kayaba Ind Co Ltd | Automatic steering system |
| CN202577436U (en) * | 2011-12-12 | 2012-12-05 | 龙工(上海)机械制造有限公司 | Hydraulic system of three-ton level wheel loader |
| CN103264725A (en) * | 2013-05-28 | 2013-08-28 | 安徽合力股份有限公司 | Safe steering system of heavy forklift |
| CN203820402U (en) * | 2014-04-23 | 2014-09-10 | 福建晋工机械有限公司 | Hydraulic system of forklift |
| CN204055955U (en) * | 2013-11-21 | 2014-12-31 | 西华大学 | A kind of special-use vehicle steering swivel system |
| CN105216861A (en) * | 2015-10-22 | 2016-01-06 | 中联重机股份有限公司 | Trac. hydrostatic power steering system is united |
| CN207257768U (en) * | 2017-08-18 | 2018-04-20 | 龙工(上海)机械制造有限公司 | A kind of wheel loader is met an urgent need steering hydraulic system |
-
2017
- 2017-08-18 CN CN201710711610.6A patent/CN107472358B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003118613A (en) * | 2001-10-12 | 2003-04-23 | Kayaba Ind Co Ltd | Automatic steering system |
| CN202577436U (en) * | 2011-12-12 | 2012-12-05 | 龙工(上海)机械制造有限公司 | Hydraulic system of three-ton level wheel loader |
| CN103264725A (en) * | 2013-05-28 | 2013-08-28 | 安徽合力股份有限公司 | Safe steering system of heavy forklift |
| CN204055955U (en) * | 2013-11-21 | 2014-12-31 | 西华大学 | A kind of special-use vehicle steering swivel system |
| CN203820402U (en) * | 2014-04-23 | 2014-09-10 | 福建晋工机械有限公司 | Hydraulic system of forklift |
| CN105216861A (en) * | 2015-10-22 | 2016-01-06 | 中联重机股份有限公司 | Trac. hydrostatic power steering system is united |
| CN207257768U (en) * | 2017-08-18 | 2018-04-20 | 龙工(上海)机械制造有限公司 | A kind of wheel loader is met an urgent need steering hydraulic system |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108583682A (en) * | 2018-05-22 | 2018-09-28 | 中冶宝钢技术服务有限公司 | Emergency vehicle steering |
| CN108995707A (en) * | 2018-08-29 | 2018-12-14 | 中国重汽集团柳州运力科迪亚克机械有限责任公司 | Snow sweeper emergency hydraulic steering |
| CN114590314A (en) * | 2022-03-22 | 2022-06-07 | 三一汽车起重机械有限公司 | Emergency steering system, chassis and operation machine |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107472358B (en) | 2023-12-15 |
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