CN202413907U - Automobile hydraulic power-assisted steering device applying compensating valve - Google Patents
Automobile hydraulic power-assisted steering device applying compensating valve Download PDFInfo
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- CN202413907U CN202413907U CN2011205306833U CN201120530683U CN202413907U CN 202413907 U CN202413907 U CN 202413907U CN 2011205306833 U CN2011205306833 U CN 2011205306833U CN 201120530683 U CN201120530683 U CN 201120530683U CN 202413907 U CN202413907 U CN 202413907U
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- oil
- valve
- steering device
- compensating valve
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Abstract
The utility model discloses an automobile hydraulic power-assisted steering device applying a compensating valve. The automobile hydraulic power-assisted steering device comprises an oil tank, an oil pump and a hydraulic power-assisted steering shell, wherein the shell is internally provided with a rack piston, and one side of the rack piston is meshed with a rocker arm shaft sector gear connected with an automobile front-wheel steering mechanism; the tail end of the rack piston is connected with a triple four-way steering control valve with a valve core being a ball screw; the triple four-way steering control valve is connected with a steering input shaft connected with a steering wheel by a torsion rod in the triple four-way steering control valve; the steering input shaft and the triple four-way steering control valve are arranged on a front cover at the front end of the shell; the front cover is internally provided with an oil inlet pipeline and an oil return pipeline; a through hole communicated with the oil return pipeline is arranged at the side part of the front cover, and an oil passing channel is arranged between the through hole and the oil inlet pipeline; the oil passing channel is internally and fixedly provided with the compensating valve which comprises a top body, a spring and an installing body; the top body is connected with the installing body by the spring; and the top body abuts against a valve opening at the bottom end of the through hole and communicated with the oil return pipeline. The automobile hydraulic power-assisted steering device provided by the uitltiy model has a simple structure.
Description
Technical field
The utility model relates to a kind of automobile hydraulic electric power steering device of using throttle compensating valve, belongs to automobile rotary valve integral power steering gear field.
Background technology
At present, the automobile hydraulic electric power steering device light, in, obtained general application on the vehicles such as heavy duty truck, passenger vehicle, utility van, car, as shown in Figure 1; The automobile hydraulic electric power steering device is made up of with deflector fuel tank 1, high-pressure oil pump (permanent current formula) 2, and the rotary valve 6 that uses in the deflector is three four-way cockes, when automobile needs right steering; Chaufeur turning clockwise bearing circle 8; At this moment rotary valve 6 is opened the oil duct that leads to epicoele A1, and high pressure oil gets into epicoele A1, and it is descending to promote rack piston 4; The rack drives rocker shaft fan tooth 5 of rack piston 4 rotates, and realizes the automobile right steering through pull bar.Otherwise, when automobile needs left steering, the chaufeur bearing circle 8 that turns left; At this moment rotary valve 6 is opened the oil duct that leads to cavity of resorption, and high pressure oil gets into cavity of resorption A2, and it is up to promote rack piston 4; Rack drives rocker shaft fan tooth 5 backward rotation of rack piston 4 realize the automobile left steering through pull bar.This steering hardware of domestic production tens families are arranged, structurally have their own characteristics each, but the ubiquity some shortcomings; Structure is perfect inadequately, is considering not consider that employed hydraulic pressure assisted steering device turns to the influence that is brought to chaufeur under the situation that driving engine accident extinguishing hydraulic pressure assisted steering device lost efficacy when hydraulic booster helps chaufeur conveniently to turn to, and the vehicle of equipping this deflector at the driving engine accident extinguishing in emergency circumstances; Power steering changes manual steering gear immediately into, fully by people's muscle power as the power emergency turn, this moment, high-pressure oil pump 2 ran out of steam; The inner decompression of automobile hydraulic electric power steering device; Suppose the vehicle straight-line travelling, if bearing circle 8 is motionless, then the rack piston in the deflector 4 is motionless; Hydraulic oil in the hydraulic efficiency pressure system stops to flow, the wheel attonity; If driver intention emergency turn to the right, chaufeur is firmly beaten direction to the right, and the rack piston 4 in the deflector will move downward; Rotary valve 6 is opened, because the motion of rack piston 4, the hydraulic oil among the cavity of resorption A2 is squeezed; Because the opening of rotary valve 6, the oil among the cavity of resorption A2 returns fuel tank 1 through fuel return hole, because the leak tightness of hydraulic efficiency pressure system again; Epicoele A1 will be from the in-line oil suction of deflector, and in-line connects high speed fuel pump 2, high speed fuel pump 2 stop motion; Can't pump from fuel tank 1, so epicoele A1 generation negative pressure, to continue to move downward like rack piston 4; Must overcome the flowed friction that epicoele A1 negative pressure produces, rack piston 4 moves downward more, and then the negative pressure of epicoele A1 generation is big more; Flowed friction is just big more, and this is " hydraulic pressure self-locking " phenomenon, and this moment, not only hydraulic booster disappeared; And the leak free oil circuit can bring very large flowed friction to steering swivel system because move or move down the hydraulic pressure locking phenomenon of formation on the rack piston 4 in the bearing circle 8 steering ribbon hydrodynamic pressure servo steering devices in the deflector, and this just brings serious safety problem to vehicle '.Problem to above-mentioned appearance; Also occur some in the market and can when hydraulic servo lost efficacy, avoid occurring the automobile steering boosting mechanism of hydraulic pressure locking phenomenon; But these boosting mechanism complex structures, difficult installation, use cost height are not easy to this safe servomechanism and popularize widely.
The utility model content
In order to overcome the deficiency of prior art; The utility model provides a kind of need that the hydraulic pressure locking phenomenon that occurs when throttle compensating valve just can be eliminated the automobile hydraulic electric power steering device in power failure is being installed on the protecgulum of steering control valve, and the automobile hydraulic electric power steering device of application throttle compensating valve simple in structure, easy for installation, that cost is low.
The technical scheme that its technical matters that overcomes the utility model adopts is:
A kind of automobile hydraulic electric power steering device of using throttle compensating valve, it comprises fuel tank, oil pump and hydraulic power-assisted steering housing, and said enclosure interior is equipped with rack piston, and a side of rack piston is engaged with the rocker shaft fan tooth that links to each other with the vehicle front steering hardware; Said rack piston end is connected with the three four-way steering control valve that spool is a ball screw; Three four-way steering control valve have the input shaft that turns to that is connected with bearing circle through its in-to-in torque rod joint; Turn to input shaft and three four-way steering control valve all to be installed on the protecgulum that is installed in the housing front end; Said protecgulum set inside has inflow pipeline and oil returning tube, and the sidepiece of said protecgulum offers the through hole that communicates with oil returning tube, offers oil canal between through hole and the inflow pipeline; Be installed with throttle compensating valve in the said through hole, throttle compensating valve comprises acrosome, spring and fixing body, and acrosome is connected with fixing body through spring, and acrosome withstands the valve port that the through hole bottom communicates with oil returning tube.
Preferably, said through hole is a screw, with the corresponding fixing body of through hole be the six-sided head plug screw.
Further, the O RunddichtringO is installed between the contact surface of said fixing body and through hole.
Further, said acrosome is a contour body, or is a steel ball.
The beneficial effect of the utility model is: the utility model is through offering the through hole that communicates with oil returning tube on the steering control valve protecgulum of automobile hydraulic electric power steering device; Between through hole and inflow pipeline, offer the oil through of connecting through hole and inflow pipeline; And in through hole, be installed with throttle compensating valve; Make that oil returning tube and inflow pipeline communicate, and have avoided the automobile hydraulic electric power steering device hydraulic pressure locking phenomenon when power failure, to occur when the oil pressure in the oil returning tube is higher than the oil pressure in the inflow pipeline; Make running car safer, and the automobile hydraulic electric power steering apparatus structure is simple, easy for installation, use cost is low.
Description of drawings
Below in conjunction with accompanying drawing and embodiment the utility model is described further.
Fig. 1 is the arrangement plan of automobile hydraulic electric power steering device in the prior art;
Fig. 2 is the arrangement plan of the utility model;
Fig. 3 is the structural representation of oil pump the utility model when in running order;
Fig. 4 is the partial enlarged drawing of A among Fig. 3;
Fig. 5 is the structural representation of oil pump the utility model when being in the inefficacy halted state;
Fig. 6 is the partial enlarged drawing of B among Fig. 5;
Fig. 7 is the partial enlarged drawing of C among Fig. 4;
Fig. 8 is the partial enlarged drawing of D among Fig. 6.
The specific embodiment
With reference to Fig. 1 ~ Fig. 8; A kind of automobile hydraulic electric power steering device of using throttle compensating valve of the utility model; It comprises fuel tank 1, oil pump 2 and housing 3, and said housing 3 inside are equipped with rack piston 4, and a side of rack piston 4 is engaged with the rocker shaft fan tooth 5 that links to each other with the vehicle front steering hardware; Said rack piston 4 ends are connected with the three four-way steering control valve 6 that spool is a ball screw; Three four-way steering control valve 6 through its in-to-in torsion bar 7 be connected be connected with bearing circle 8 turn to input shaft 9; Turn to input shaft 9 and three four-way steering control valve 6 all to be installed on the protecgulum 10 that is installed in housing 3 front ends; Said protecgulum 10 set inside have inflow pipeline 101 and oil returning tube 102; The sidepiece of said protecgulum 10 offers the through hole 103 that communicates with oil returning tube 102, offers oil canal 104 between through hole 103 and the inflow pipeline 101; Be installed with throttle compensating valve 11 in the said through hole 103, throttle compensating valve 11 comprises acrosome 111, spring 112 and fixing body 113, and acrosome 111 is connected with fixing body 113 through spring 112, and acrosome 111 withstands the valve port that through hole 103 bottoms communicate with oil returning tube 102.Said through hole 103 is preferably screw; Be preferably the six-sided head plug screw with through hole 103 corresponding fixing bodies 113; So just can throttle compensating valve 11 be installed on the protecgulum 10 through being threaded, easy for installation, after throttle compensating valve 11 installs and fixes; The acrosome 111 of throttle compensating valve 11 withstands on through hole 113 bottoms and the valve port that oil returning tube 102 communicates; It is very little that the rigidity Design of said spring 112 becomes, like this if the oil pressure in the oil returning tube 102 a little more than the oil pressure in the inflow pipeline 101, acrosome 111 just can be made inflow pipeline 101 and oil returning tube 102 communicate by oil pressure jack-up; This has just been avoided after power failure oil pump 2 quits work; The not subjected to pressure chamber of rack piston 4 one ends prevents that because of can't oil suction generation negative pressure forming the hydraulic pressure locking phenomenon negative pressure from being the rotation formation flowed friction of bearing circle to the up-and-down movement of rack piston 4, increased running safety.In addition; Can know according to hydraulic principle when automobile hydraulic electric power steering device normal operation, no matter vehicle is forward travel or turns to; Inflow pipeline 101 pressure in the protecgulum 10 are all greater than the pressure of oil returning tube 102; The acrosome 111 of throttle compensating valve 11 compresses valve port all the time under the effect of pressure, inflow pipeline 101 does not communicate automobile hydraulic electric power steering device normal operation with oil returning tube 102.Through hole 103 and fixing body 113 are adopted screw and six-sided head plug screw structure respectively, when throttle compensating valve 11 appearance are unusual, can also be through the elastic force of rotation six-sided head plug screw regulating spring 112, so that throttle compensating valve is tending towards normal operation; Certainly, fixing body 113 also can be welded in the through hole 103.
Preferably, when fixing body 113 and through hole 103 adopt six-sided head plug screw and Screw hole structure respectively, between the contact surface of through hole 103 and fixing body 113 O RunddichtringO 12 is installed, to increase the leak tightness after throttle compensating valve 11 is installed.
Further; Said acrosome 111 is a contour body; Or be a steel ball; Acrosome 111 is to stop up valve port when being higher than the oil pressure in the oil returning tube 102 for the oil pressure in inflow pipeline 101 to communicate with oil returning tube 102 with blocking-up inflow pipeline 101, so acrosome 111 both can use steel ball, also can use contour body.
The utility model is through offering the through hole that communicates with oil returning tube on the steering control valve protecgulum of automobile hydraulic electric power steering device; Between through hole and inflow pipeline, offer the oil through of connecting through hole and inflow pipeline; And in through hole, be installed with throttle compensating valve; Make that oil returning tube and inflow pipeline communicate, and have avoided the automobile hydraulic electric power steering device hydraulic pressure locking phenomenon when power failure, to occur when the oil pressure in the oil returning tube is higher than the oil pressure in the inflow pipeline; Make running car safer, and the automobile hydraulic electric power steering apparatus structure is simple, easy for installation, use cost is low.
The above, the just preferred embodiment of the utility model, the utility model is not limited to above-mentioned embodiment, as long as it reaches the technique effect of the utility model with same or analogous means, all should belong to the protection domain of the utility model.
Claims (4)
1. automobile hydraulic electric power steering device of using throttle compensating valve; Comprise fuel tank (1), oil pump (2) and housing (3); Said housing (3) inside is equipped with rack piston (4), and a side of rack piston (4) is engaged with the rocker shaft fan tooth (5) that links to each other with the vehicle front steering hardware; Said rack piston (4) end is connected with the three four-way steering control valve (6) that spool is a ball screw; Three four-way steering control valve (6) through its in-to-in torsion bar (7) be connected be connected with bearing circle (8) turn to input shaft (9); Turn to input shaft (9) and three four-way steering control valve (6) all to be installed on the protecgulum (10) that is installed in housing (3) front end; Said protecgulum (10) set inside has inflow pipeline (101) and oil returning tube (102); It is characterized in that: the sidepiece of said protecgulum (10) offers the through hole (103) that communicates with oil returning tube (102), offers oil canal (104) between through hole (103) and the inflow pipeline (101); Be installed with throttle compensating valve (11) in the said through hole (103); Throttle compensating valve (11) comprises acrosome (111), spring (112) and fixing body (113); Acrosome (111) is connected with fixing body (113) through spring (112), and acrosome (111) withstands the valve port that through hole (103) bottom communicates with oil returning tube (102).
2. a kind of automobile hydraulic electric power steering device of using throttle compensating valve according to claim 1 is characterized in that: said through hole (103) is a screw, with the corresponding fixing body of through hole (103) (113) be the six-sided head plug screw.
3. a kind of automobile hydraulic electric power steering device of using throttle compensating valve according to claim 2 is characterized in that: between the contact surface of said fixing body (113) and through hole (103) O RunddichtringO (12) is installed.
4. according to each described a kind of automobile hydraulic electric power steering device of using throttle compensating valve in the claim 1 ~ 3, it is characterized in that: said acrosome (111) is a contour body, or is a steel ball.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205306833U CN202413907U (en) | 2011-12-16 | 2011-12-16 | Automobile hydraulic power-assisted steering device applying compensating valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205306833U CN202413907U (en) | 2011-12-16 | 2011-12-16 | Automobile hydraulic power-assisted steering device applying compensating valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202413907U true CN202413907U (en) | 2012-09-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011205306833U Expired - Fee Related CN202413907U (en) | 2011-12-16 | 2011-12-16 | Automobile hydraulic power-assisted steering device applying compensating valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202413907U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107504004A (en) * | 2017-09-13 | 2017-12-22 | 江苏恒立液压科技有限公司 | Novel pressure recuperation valve |
-
2011
- 2011-12-16 CN CN2011205306833U patent/CN202413907U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107504004A (en) * | 2017-09-13 | 2017-12-22 | 江苏恒立液压科技有限公司 | Novel pressure recuperation valve |
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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: 20120905 Termination date: 20171216 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |