CN203005518U - Steering emergency valve - Google Patents
Steering emergency valve Download PDFInfo
- Publication number
- CN203005518U CN203005518U CN 201220715916 CN201220715916U CN203005518U CN 203005518 U CN203005518 U CN 203005518U CN 201220715916 CN201220715916 CN 201220715916 CN 201220715916 U CN201220715916 U CN 201220715916U CN 203005518 U CN203005518 U CN 203005518U
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Abstract
A steering emergency valve which is widely applied to hydraulic power steering systems of various heavy-duty vehicles comprises a main reversing valve group and an electro-hydraulic signal converter. An integral type composite structure and a three-dimensional channel design are utilized in a structural design of the steering emergency valve; a reversing valve core utilizes a sliding valve type structure; differential pressure of pressure oil is generated at two ends of the valve core due to the fact that the valve core fixes a damping hole and accordingly moving reversing of the reversing valve core is achieved; the reversing valve core is reset through a spring; and two one-way valves, a cartridge safety overflow valve and the electro-hydraulic signal converter are arranged in a channel. The steering emergency valve has the advantages of being capable of guaranteeing normal operation of the hydraulic power steering systems of vehicles and capable of immediately switching into an emergency pump to supply the hydraulic power steering systems with oil and output electric signals when a main system breaks down to guarantee the safety of driving, further improving an emergency power steering function of the heavy-duty vehicles and improving the reliability of the hydraulic power steering systems.
Description
Technical field
The utility model relates to the motor turning valve technology, is widely used in the hydraulic power-assist steering system of all kinds of heavy motor vehicles.
Background technology
Heavy motor vehicle all is provided with hydraulic power-assist steering system at present, but hydraulic power-assist steering system does not generally arrange emergent hydraulic efficiency pressure system, is single closed circuit hydraulic efficiency pressure system.In motion in case occur that sudden engine is flame-out, during the fault such as power assistance pump for steering cisco unity malfunction or pipeline leakage, hydraulic power-assist steering system underfed or without flow makes the motor turning difficulty, very easily accident.
Summary of the invention
In order to overcome the defective that the heavy motor vehicle hydraulic power-assist steering system is single closed circuit hydraulic efficiency pressure system, the utility model provides a kind of multi-function rotating to guard valve, both guaranteed the normal operation of hydraulic power steering system, switch to immediately jury pump to hydraulic power-assist steering system fuel feeding and output electrical signals again when the main system fault, to guarantee driving safety, the emergent turning function of heavy motor vehicle is further improved
The technical solution of the utility model is as follows:
A kind of guard valve that turns to comprises main reversing valve group and electric liquid signal converter.
Described main reversing valve group adopts slide-valve structure, is comprised of commutation valve body, the main valve plug, retracing spring A, check valve A and the check valve B that are arranged in the commutation valve body;
Be provided with the P1 switching port that is connected with the power-assisted main pump on described commutation valve body, the P2 switching port that is connected with jury pump, the working hole A mouth that is connected with the distributing valve of power steering, the T mouth that is connected with the tank drainback mouth;
Described main valve plug one end is equipped with retracing spring.
Described check valve A is arranged between retracing spring A and working hole A mouth.
Described check valve B is arranged between the P1 switching port and P2 switching port and working hole A mouth of main valve plug.
P1 switching port pressure oil is flowed through damping hole on main valve plug and check valve A to working hole A mouth, produces pressure reduction automatic reverse at main valve plug two ends and switches oil circuit; Described electric liquid signal converter is comprised of steel ball/steel column, retracing spring B and contact lever, they are arranged in the commutation valve body, described steel ball/steel column is arranged between retracing spring B and contact lever, steel ball/steel column is pressed on contact lever under the effect of spring force, steel ball/steel column and mounting hole adopt little free-running fit structure, hydraulic oil by the time pressure reduction that forms overcome spring force and make steel ball/steel column disengage bar; Being provided with electric liquid signal converter joint on described commutation valve body, is the terminal point of electric liquid signal converter output electrical signals.
Described P1 switching port and P2 switching port only have one to be the forward conduction state with working hole A mouth by main valve plug at any one time; The P2 switching port is communicated with or disconnects by main valve plug and electric liquid signal converter with the T mouth.
Built-in plug-in safety overflow valve is installed in described commutation valve body, and described plug-in safety overflow valve is arranged between the rear end and working hole A mouth of check valve A and check valve B.
Valve body of the present utility model has adopted the integral type unitized construction on structure design, three-dimensional runner design, main valve plug adopts slide-valve structure, pressure oil by spool fixedly damping hole produce pressure reduction at spool two ends, realize the mobile commutation of reversing valve core, main valve plug leans on spring reset, and is provided with plug-in one-way valve A, direct-installation check valve B, plug-in safety overflow valve and an electric liquid signal converter in runner.Turn to guard valve with the original power-assisted main pump of automobile and in parallel by the jury pump of car transmissions driving, the power-assisted main pump is steering swivel system main pump oil sources, jury pump is steering swivel system stand by pump oil sources, between main pump oil sources and stand by pump oil sources by turning to guard valve to be connected.Turning to the guard valve reversing valve core to make all can only have one to be the forward conduction state with actuating unit at any one time between power-assisted main pump and jury pump.When main servo steering system fault caused, reversing valve core is commutation fast under the effect of spring force, switches to the jury pump fuel feeding, guarantees driving safety.Meanwhile, electric liquid signal converter is communicated with, and sends electric signal, and prompting navigating mate hydraulic power-assist steering system et out of order in time stops and repairs fault.
As seen, the utility model can guarantee the normal operation of hydraulic power steering system, can switch to immediately jury pump to hydraulic power-assist steering system fuel feeding and output electrical signals when the main system fault again, to guarantee driving safety, further improve the emergent servo-steering function of heavy motor vehicle, improve the reliability of hydraulic power-assist steering system, realized the centralized control of double pump oil sources and had the fault real time alarm function.
Description of drawings
Fig. 1 is the hydraulic schematic diagram of utility model.
Fig. 2 and Fig. 2 A are shape assumption diagrams of the present utility model.
Fig. 3 and Fig. 3 A are the vertical section structure figure of first embodiment of the utility model.
1. commutation valve body, 2. main valve plug, 3. damping holes in figure, 4. retracing spring A, 5. check valve A, 6. check valve B, 7. steel ball/steel column, 8. retracing spring B, 9. contact lever, 10. safety overflow valve, 11. electric liquid signal converter joints, 12. electric liquid signal converters, 13. P1 switching port, 14. the P2 switching port, 15. check valve A spring terminals, 16. check valve B spring terminals.
The specific embodiment:
Below in conjunction with drawings and Examples, the utility model is further illustrated.
Referring to Fig. 2 and Fig. 3, originally turn to guard valve to be consisted of by main reversing valve group, electric liquid signal converter and safety overflow valve.
Form the main reversing valve group by commutation valve body (1), main valve plug (2), damping hole (3), retracing spring A (4), check valve A (5) and check valve B (6), the main reversing valve group adopts slide-valve structure.Be provided with the P1 switching port that is connected with the power-assisted main pump, the P2 switching port that is connected with jury pump, the A mouth that is connected with the distributing valve of power steering, the T mouth that is connected with the tank drainback mouth on commutation valve body (1).Main valve plug (2) left end (seeing Fig. 3) is equipped with retracing spring A, check valve A (5) is arranged between retracing spring A and working hole A mouth, and check valve B (6) is arranged between the switching of main valve plug (2) P1 mouth and P2 switching port and working hole A mouth.For the trouble free service that guarantees hydraulic efficiency pressure system arranges built-in plug-in safety overflow valve (10), be used for the pressure of regulator control system pressure oil, be arranged between the rear end and working hole A mouth of check valve A (5) and check valve B (6).P1 switching port pressure oil is flowed through damping hole (3) on main valve plug and check valve A (5) to working hole A mouth, produces pressure reduction automatic reverse at main valve plug two ends and switches oil circuit.
Electricity liquid signal converter is comprised of steel ball/steel column (7), retracing spring B (8) and contact lever (9), they are arranged in commutation valve body (1), described steel ball/steel column (7) is arranged between retracing spring B (8) and contact lever (9), steel ball/steel column is pressed on contact lever under the effect of spring force, steel ball/steel column and mounting hole adopt little free-running fit structure, hydraulic oil by the time pressure reduction that forms overcome spring force and make steel ball/steel column disengage bar; Being provided with electric liquid signal converter joint (11) on described commutation valve body (1), is the terminal point of electric liquid signal converter output electrical signals.
Described P1 mouth and P2 mouth can only have one to be the forward conduction state with the A mouth by main valve plug (2) at any one time, and the P2 mouth is communicated with or disconnects by main valve plug (2) and electric liquid signal converter with the T mouth.
In conjunction with Fig. 1 and Fig. 2, originally turn to the P1 switching port of guard valve to be connected with the power-assisted main pump, the P2 switching port is connected with jury pump, and working hole A mouth is connected with the distributing valve of power steering, and the T mouth is connected with fuel tank and is used for oil return.Turning to the guard valve reversing valve core to make all can only have one to be the forward conduction state with actuating unit at any one time between power-assisted main pump and jury pump.Its effect is to make two oil sources (P1 switching port and P2 switching port) in parallel and work alone respectively in hydraulic power-assist steering system.
During normal operation, the main pump oil sources is by P1 mouth input pressure oil, main valve plug overcomes spring force and moves to left under the effect of pressure oil, push spool and the working hole A mouth of check valve A open connects by the partial pressure oil of main valve plug damping hole, the P1 switching port entered check valve B front end with pressure oil and pushed its spool open and enters working hole A mouth this moment, then supplied with actuating unit work by working hole A mouth pressure oil output; Jury pump (stand by pump) oil sources by P2 switching port input pressure oil, because switching P2 switching port and the oil return runner of main valve plug are connected, flows back to fuel tank by return opening (both T mouths) simultaneously.In the oil return runner, the steel ball of electric liquid signal converter and the matching design in hole are little free-running fit, the jury pump pressure oil by the time form pressure reduction and overcome spring force and make steel ball disengage device, fault-indicating lamp no signal at this moment.
when main system break down or in the process of moving sudden engine quit work, P1 switching port underfed or during without flow, reversing valve core (main valve plug) reset (the getting back to original confined state) that move right under the spring-force driven dual of retracing spring, this moment, P1 switching port and working hole A mouth disconnected, P2 switching port and oil return runner are closed rapidly, jury pump P2 switching port pressure oil enters check valve B front end and pushes its spool open and enters working hole A mouth, supply with actuating unit work by working hole A pressure oil output again, while jury pump pressure oil enters check valve A spring terminal by runner closes it.At this moment steel ball under the effect of retracing spring B spring force, makes steel ball contact with contact lever, by electric liquid signal converter joint output electrical signals, shows that main system breaks down.
Claims (2)
1. one kind turns to guard valve, it is characterized in that, comprises main reversing valve group and electric liquid signal converter;
Described main reversing valve group adopts slide-valve structure, is comprised of the main valve plug (2), retracing spring A (4), check valve A (5) and the check valve B (6) that commutate valve body (1), be arranged in commutation valve body (1);
Be provided with the P1 switching port that is connected with the power-assisted main pump on described commutation valve body (1), the P2 switching port that is connected with jury pump, the working hole A mouth that is connected with the distributing valve of power steering, the T mouth that is connected with the tank drainback mouth;
Described main valve plug (2) one ends are equipped with retracing spring;
Described check valve A (5) is arranged between retracing spring A and working hole A mouth;
Described check valve B (6) is arranged between the P1 switching port and P2 switching port and working hole A mouth of main valve plug (2);
P1 switching port pressure oil is flowed through damping hole (3) on main valve plug and check valve A (5) to working hole A mouth, produces pressure reduction automatic reverse at main valve plug two ends and switches oil circuit; Described electric liquid signal converter is comprised of steel ball/steel column (7), retracing spring B (8) and contact lever (9), they are arranged in commutation valve body (1), described steel ball/steel column (7) is arranged between retracing spring B (8) and contact lever (9), steel ball/steel column is pressed on contact lever under the effect of spring force, steel ball/steel column and mounting hole adopt little free-running fit structure, hydraulic oil by the time pressure reduction that forms overcome spring force and make steel ball/steel column disengage bar; Being provided with electric liquid signal converter joint (11) on described commutation valve body (1), is the terminal point of electric liquid signal converter output electrical signals;
Described P1 switching port and P2 switching port only have one to be the forward conduction state with working hole A mouth by main valve plug (2) at any one time; The P2 switching port is communicated with or disconnects by main valve plug (2) and electric liquid signal converter with the T mouth.
2. the guard valve that turns to according to claim 1, it is characterized in that, built-in plug-in safety overflow valve (10) is installed in described commutation valve body (1), and described plug-in safety overflow valve is arranged between the rear end and working hole A mouth of check valve A (5) and check valve B (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220715916 CN203005518U (en) | 2012-12-21 | 2012-12-21 | Steering emergency valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220715916 CN203005518U (en) | 2012-12-21 | 2012-12-21 | Steering emergency valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203005518U true CN203005518U (en) | 2013-06-19 |
Family
ID=48597136
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220715916 Expired - Fee Related CN203005518U (en) | 2012-12-21 | 2012-12-21 | Steering emergency valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203005518U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104129428A (en) * | 2014-07-23 | 2014-11-05 | 徐州重型机械有限公司 | Emergency steering control system and method |
| CN108087366A (en) * | 2018-01-25 | 2018-05-29 | 陈艳艳 | A kind of flow divider valve for single-pump system |
| CN114312994A (en) * | 2022-01-10 | 2022-04-12 | 中国重汽集团济南动力有限公司 | Hydraulic steering power assisting device and system for multi-shaft vehicle |
| CN114506386A (en) * | 2022-03-23 | 2022-05-17 | 北京福田戴姆勒汽车有限公司 | Control method for vehicle emergency steering, steering power-assisted system and transport dump truck |
-
2012
- 2012-12-21 CN CN 201220715916 patent/CN203005518U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104129428A (en) * | 2014-07-23 | 2014-11-05 | 徐州重型机械有限公司 | Emergency steering control system and method |
| CN104129428B (en) * | 2014-07-23 | 2017-05-03 | 徐州重型机械有限公司 | Emergency steering control system and method |
| CN108087366A (en) * | 2018-01-25 | 2018-05-29 | 陈艳艳 | A kind of flow divider valve for single-pump system |
| CN114312994A (en) * | 2022-01-10 | 2022-04-12 | 中国重汽集团济南动力有限公司 | Hydraulic steering power assisting device and system for multi-shaft vehicle |
| CN114506386A (en) * | 2022-03-23 | 2022-05-17 | 北京福田戴姆勒汽车有限公司 | Control method for vehicle emergency steering, steering power-assisted system and transport dump truck |
| CN114506386B (en) * | 2022-03-23 | 2023-08-22 | 北京福田戴姆勒汽车有限公司 | Control method for vehicle emergency steering, steering power-assisted system and transport dumper |
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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: Luzhou Changjiang Hydraulic Complete Manufactory Co., Ltd. Assignor: Sichuan Haibo Hydraulic Machinery Co., Ltd. Contract record no.: 2014500000012 Denomination of utility model: Steering emergency valve Granted publication date: 20130619 License type: Exclusive License Record date: 20140512 |
|
| LICC | Enforcement, change and cancellation of record of contracts on the licence for exploitation of a patent or utility model | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130619 Termination date: 20141221 |
|
| EXPY | Termination of patent right or utility model |