CN2839067Y

CN2839067Y - Coaxle flow amplifing compound sensing steering gear

Info

Publication number: CN2839067Y
Application number: CN 200520023292
Authority: CN
Inventors: 闫希宇; 燕明德
Original assignee: Chinese Academy of Agricultural Mechanization Sciences
Current assignee: Chinese Academy of Agricultural Mechanization Sciences
Priority date: 2005-09-21
Filing date: 2005-09-21
Publication date: 2006-11-22
Anticipated expiration: 2015-09-21

Abstract

The utility model relates to a hydraulic component used in a hydraulic power steering system of a vehicle. The coaxial flow amplifying compound sensing steering gear of the utility model comprises a steering control valve and a metering valve, wherein the steering control valve comprises a valve body, a valve sleeve installed in the valve body and a valve core. The valve sleeve is provided with a plurality of amplifying holes. An oil inlet of the steering control valve on the valve body is divided into two paths, one path leads to a metering oil inlet path of the metering valve, and the other path leads to an amplifying oil inlet path. The utility model has the advantages of compact structure, small volume, low cost, little energy consumption, high efficiency, and convenient installation and arrangement. The utility model realizes the linearization of the rotating speed of a steering wheel and the oil mass of the amplifying holes, namely that the utility model realizes the linearization of the rotating speed of the steering wheel and the rotation angle of a castor. Therefore, run-out produced when a vehicle steers is avoided, and steering is made to become steady, safe and reliable.

Description

Coaxial Flow Gain Mixed Mode Sensory Deflector

Technical field

The utility model relates to a kind of hydraulic pressure components and parts that are used for the vehicle hydraulic power steering system, especially a kind of Coaxial Flow Gain Mixed Mode Sensory Deflector that integrates load sensing deflector and flow amplifier.

Background technology

The amplifying and steering system of existing deflector and flow amplifier combination does not possess the load sensing function owing to is made up of two parts, and connecting line etc. strengthens the consumption of power of system in addition, and purchase cost is high too, is unfavorable for energy-conservation and cost-cutting requirement.The patent No. is ZL00247499, name is called " load sensing flow gain all-hydraulic steering gear " and discloses a kind of load sensing that integrates and turn to structure with two kinds of functions of flow gain, comprise control rotary valve and gauging device, oil-feed annular groove when turning on the valve body communicates with oil-feed annular groove on the valve pocket cylindrical, the oil outlet of oil-feed annular groove punishment two-way leads up to oil inlet on the valve pocket and gauging device to communicate with oil cylinder pod on the spool; Another road communicates with flow gain mouth and the amplification pod on the spool, oil cylinder pod on the valve pocket successively.Like this, the flow that enters oil cylinder is the summation of two-way flow, the effective discharge of deflector is bigger than gauging device discharge capacity, realize the flow gain function, have advantages such as cost is low, overall dimension diminishes, compact conformation, mounting arrangements convenience, but in this kind structure, owing to amplify in-line and metering oil circuit separately at the valve pocket place, amplify oil circuit like this with steering cylinder and the direct UNICOM of oil pump, when steering cylinder is subjected under the external force effect, can take place fluid to flow backwards when the pressure of one side oil pocket is higher than pressure fuel pump and make and turn to malfunctioningly, have potential safety hazard; In addition, it amplifies the hole is 3 row's apertures, do not have differential seat angle between the hole, and the circumferencial direction size is too little, can not realize omnidistance the amplification, and the linearity of amplified flow is bad, easily the build-up of pressure runout.

The utility model content

The purpose of this utility model is at above-mentioned the deficiencies in the prior art, and a kind of steering safety failure-free Coaxial Flow Gain Mixed Mode Sensory Deflector is provided.

For achieving the above object, the utility model adopts following technical scheme:

The utility model Coaxial Flow Gain Mixed Mode Sensory Deflector, comprise steering control valve and calibrate valve, wherein steering control valve comprises valve body, is installed in valve pocket and spool in the valve body, wherein valve pocket is provided with some amplifications hole, wherein the oil inlet of steering control valve is divided into two-way on valve body, one the tunnel leads to the metering in-line of described calibrate valve, and the amplification in-line is led on another road.

The check valve that prevents that fluid from flowing backwards is housed on the wherein said amplification in-line.

Wherein said some amplifications hole branch two on valve pocket is axial is arranged and is put, and corresponding two pairing arc chord angles of the line of centres are 5.5 °-7.5 ° in the two discharging macropores.

Wherein said corresponding two pairing arc chord angles of the amplification hole line of centres are 6.5 °.

The advantage and the good effect of Coaxial Flow Gain Mixed Mode Sensory Deflector of the present utility model are: in the utility model, owing to amplify in-line and metering oil circuit separately at the valve body place, the direct oil-feed of metering oil circuit, thereby avoided doing the time spent when steering cylinder is subjected to external force, can take place fluid to flow backwards when the pressure of one side oil pocket is higher than pressure fuel pump and make and turn to malfunctioning phenomenon, strengthen the safe reliability that turns to.

Description of drawings

Fig. 1 is the cutaway view of the utility model Coaxial Flow Gain Mixed Mode Sensory Deflector;

Fig. 2 is the birds-eye view of Fig. 1;

Fig. 3 is the A-A cutaway view of Fig. 1;

Fig. 4 is the C-C cutaway view of Fig. 2;

Fig. 5 is that valve pocket, the spool in the utility model launches back relative position scheme drawing;

Fig. 6 is that the oil circuit of the steering control valve control in the utility model when turning left moves towards figure.

Among the figure: 2. spool; 3. baffle ring; 4. slip ring; 5. spring leaf; 6. finger; 7. universal driving shaft; 8. check valve; 9. valve pocket; 10. valve body; 11. every dish; 12. limited post; 13. limited post pad 16. rotors; 17. stator; 18. valve pocket afterbody circular hole; 19. spool afterbody circular hole; 20. the fuel feed hole of valve pocket; 21. the oil feed groove of spool; 22. valve body half hole; 23. every the dish oilhole; 24. valve pocket oil outlet; 25. amplification hole; 26. spool goes out oil groove; 30. steering control valve; 31. calibrate valve; 32. oil inlet.

The specific embodiment

Below in conjunction with accompanying drawing, further describe the specific embodiment of the utility model low-pressure opening formula on-load switch, but be not used for limiting protection domain of the present utility model.

Referring to Fig. 1 to Fig. 4.Coaxial Flow Gain Mixed Mode Sensory Deflector of the present utility model comprises steering control valve 30 and calibrate valve 31, is equipped with between steering control valve 30 and the calibrate valve 31 every dish 11, is provided with every dish oilhole 23 every dish 11.Steering control valve 30 comprises valve body 10, is installed in valve pocket 9 and spool 2 in the valve body 10, and wherein valve pocket 9 is provided with some amplifications hole 25, sees Fig. 5.By finger 6 universal driving shaft 7 is installed on the valve pocket 9.The endoporus side of valve body 10 is provided with 5 annular grooves, and the cylindrical side is provided with oil inlet 32.Baffle ring 3, slip ring 4 are equipped with in spool 2 ends, and spring leaf 5 is housed in the spool 2, and spool 2 is provided with afterbody circular hole 19, oil feed groove, goes out oil groove.Be provided with commentaries on classics stator pair, limited post 12 and the limited post pad 13 formed by rotor 16 and stator 17 in the calibrate valve 31.Valve body 10 is provided with valve body half hole 22.The oil inlet 32 of steering control valve 30 is divided into two-way on valve body 10, one the tunnel leads to the metering in-line of described calibrate valve 31, and the amplification in-line is led on another road, on the amplification in-line check valve 8 is housed, to prevent that fluid from flowing backwards, and further improves the safe reliability of work.The part processing of valve body 10, valve pocket 9, spool 2, rotor 16, stator 17 etc. adopts advanced processing technology and special use and necessary technology equipment, and key is that cylindricity 0.008～0.01, the position degree 0.05 of spool valve pocket oilhole, the cycloid that will guarantee the valve body main aperture change the squareness 0.005 of stator and the dimensional accuracy in gap 0.003～0.009.

As shown in Figure 5, in the utility model, the branch two on valve pocket is axial of the some amplifications hole 25 on the valve pocket 9 is arranged and is put, and corresponding two pairing arc chord angles of the line of centres are 6.5 ° in the two discharging macropores 25.This arc chord angle all is feasible in 5.5 ° of-7.5 ° of scopes.It is obstructed that the bearing circle rotating speed amplifies oil circuit during less than 10prm, first amplifies hole and is communicated with oil groove and begins amplification during greater than 10prm when rotating speed, and along with second of the raising of rotating speed amplified the hole and also entered oil groove the flow area that amplifies oil circuit is increased gradually, and two amplification holes, hole all enter oil groove and make the amplification flow area reach maxim when rotating speed reaches 60rpm, flow area is directly proportional with rotating speed during the amplification, thereby realization linear amplification, can reduce greatly like this and eliminate the pressure runout, make turn to more to become steady.

Referring to Fig. 6.Principle of work of the present utility model is: when bearing circle does not rotate, spool 2 and valve pocket 9 are in center position under the effect of spring leaf 5, pressure oil from Hydraulic Pump enters spool 2 inner chambers from valve pocket afterbody circular hole 18 and spool afterbody circular hole 19, and flow back to fuel tank through back oil road and oil return pipe, turn to oil cylinder two chamber hydraulic oil complete closed, road wheel is change of direction not.

When bearing circle rotates, driving spool 2 by Steering gear rotates, spring leaf 5 distortion, spool 2 relative valve pocket 9 angle of arrival are poor, make the fuel feed hole 20 of valve pocket communicate with the oil feed groove 21 of spool, hydraulic oil enters through valve pocket fuel feed hole 20, valve body half hole 22, every dish oilhole 23 changes the stator pair, then enters spool by valve pocket oil outlet 24 and goes out oil groove 26.Meanwhile, going out oil groove 26 with spool after a while by the pressure oil that amplifies hole 25 communicates, go out the stack of oil groove 26 places by pressure oil that amplifies hole 25 and the pressure oil that comes the rotation stator at spool, enter the oil pocket that turns to oil cylinder one end by valve A (or B) mouth, oil cylinder is moved and realize power steering, the low pressure oil in another chamber of oil cylinder flows back to fuel tank through oilhole and oil groove, the T mouth of deflector B (or A) mouth, spool valve pocket, and this moment, end orifices was closed.When valve pocket rotated, the finger 6 of power on valve pocket 9 drove universal driving shaft 7, and rotor 16 and valve pocket 9 are synchronously rotated, and the commentaries on classics stator pair of this moment plays the fuel gauging effect.

When the bearing circle rotating speed strengthens, spring leaf 5 distortion also strengthen, enter oil mass and the also increase thereupon of oil mass of changeing the stator pair by amplifying hole 25, so entering the size of the oil mass of oil cylinder is directly proportional with the speed that bearing circle rotates, if bearing circle stops operating, thereby spool 2 disappears outer corner difference to close all passages towards oil cylinder in the effect turning down of spring leaf 5, and the spool valve pocket is got back to center position.At this moment, the pressure oil that enters deflector has only a very little part to flow back to fuel tank by spool valve pocket afterbody circular hole.

The utility model Coaxial Flow Gain Mixed Mode Sensory Deflector is the novel steering device that integrates the deflector of coventional type load sensing and two kinds of functions of flow amplifier, hydraulic pressure components and parts such as it and constant current and constant voltage power suspply, pressure-gradient control valve, bidirectional buffering Fill valve are formed the load sensing compound type sensing steering swivel system of big discharge capacity, have compact conformation, volume is little, price is low, less energy consumption, efficient height, mounting arrangements is convenient and be convenient to advantage such as maintenance.Realized bearing circle rotating speed and the linearization of amplifying the hole oil mass technically, realized the linearization of the corner of bearing circle rotating speed and wheel flutter in other words, so just avoided the car runout takes place when turning to, make turn to more steady, safe and reliable.Structurally key is the corner that has solved the shape in flow gain hole on the valve pocket, size, cut when beginning to amplify, make determined geomery and position accuracy value scientific and reasonable through theoretical calculating repeatedly with test, system linearity is good, simple in structure, be suitable for, improved the performance of steering swivel system.

The utility model belongs to the hydraulic pressure components and parts in the electromechanical integration, being used for power steering system and other occasion that requires follow-up control of construction machinery and equipment, mining machinery, forestry machinery, road machinery and large-scale field machine, is a kind of Coaxial Flow Gain Mixed Mode Sensory Deflector that integrates load sensing deflector and flow amplifier.

More than be preferred forms of the present utility model, according to the disclosed content of the utility model, some identical, replacement schemes that those of ordinary skill in the art can expect apparently all should fall into the scope that the utility model is protected.

Claims

1. Coaxial Flow Gain Mixed Mode Sensory Deflector, comprise steering control valve (30) and calibrate valve (31), wherein steering control valve (30) comprises valve body (10), is installed in valve pocket (9) and spool (2) in the valve body (10), wherein valve pocket (9) is provided with some amplifications hole (25), the oil inlet (32) that it is characterized in that described steering control valve (30) is divided into two-way on valve body (10), one the tunnel leads to the metering in-line of described calibrate valve (31), and the amplification in-line is led on another road.

2. Coaxial Flow Gain Mixed Mode Sensory Deflector according to claim 1 is characterized in that being equipped with on the described amplification in-line check valve (8) that prevents that fluid from flowing backwards.

3. Coaxial Flow Gain Mixed Mode Sensory Deflector according to claim 1, it is characterized in that described some amplifications holes (25) divide on axially two to arrange and put at valve pocket, corresponding two pairing arc chord angles of the line of centres are 5.5 °-7.5 ° in the two discharging macropores (25).

4. Coaxial Flow Gain Mixed Mode Sensory Deflector according to claim 3 is characterized in that corresponding two pairing arc chord angles of amplification hole (25) line of centres are 6.5 °