CN2866285Y - Hydraulic centralizing cylinder of vehicle rear wheel steering mechanism - Google Patents

Hydraulic centralizing cylinder of vehicle rear wheel steering mechanism Download PDF

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Publication number
CN2866285Y
CN2866285Y CN 200520099777 CN200520099777U CN2866285Y CN 2866285 Y CN2866285 Y CN 2866285Y CN 200520099777 CN200520099777 CN 200520099777 CN 200520099777 U CN200520099777 U CN 200520099777U CN 2866285 Y CN2866285 Y CN 2866285Y
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China
Prior art keywords
right sides
oil cylinder
oil
wheel steering
cylinder
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Expired - Fee Related
Application number
CN 200520099777
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Chinese (zh)
Inventor
周谊
王新郧
袁大学
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SPECIAL VEHICLE TECHNOLOGY CENTER OF CHINA SANJIANG SPACE ESTATE GROUP
CHINA SANJIANG SPACE ESTATE INDUSTRY GROUP Co
Original Assignee
SPECIAL VEHICLE TECHNOLOGY CENTER OF CHINA SANJIANG SPACE ESTATE GROUP
CHINA SANJIANG SPACE ESTATE INDUSTRY GROUP Co
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Priority to CN 200520099777 priority Critical patent/CN2866285Y/en
Application granted granted Critical
Publication of CN2866285Y publication Critical patent/CN2866285Y/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Abstract

A hydraulic alignment cylinder of the vehicle rear wheel steering mechanism, which comprises an oil cylinder and a left and a right oil cylinder caps, wherein the oil cylinder body is equipped with piston bar with its interior terminal equipped with a ring boss which is equipped with a left and a right fluctuation pistons laterally, the intermediate section of the oil cylinder body is equipped with an interior boss corresponding with the ring boss gap, the interior boss divides the left and the right fluctuation pistons bilaterally. A left cavity and a right oil cavity are provided between the left and the right fluctuation pistons and the left and the right oil cylinder caps, oil channels connecting with the hydraulic oil control valve in the system are respectively equipped in the left and the right cavities. The piston bar crosses through the left oil cylinder cap with its exterior connects with a left ball-and-spigot thorough a left joint, the right oil cylinder cap connects with a right ball-and-spigot through a right joint. The left and the right ball-and-spigots are respectively fixed on the rear wheel steering mechanism and the frame supporting seats of vehicles. The utility model locks the rear steering wheel on the rectilinear position when driving with high speed and exerts no friction on the rear wheels when steering, thereby ensuring stability and safety driving of vehicles with high speeds.

Description

The hydraulic pressure centering cylinder of automobile back wheel steering hardware
Technical field
The utility model relates to the auxiliary device in the multi-wheeler steering swivel system with rear axle steering function, refers to a kind of hydraulic pressure centering cylinder of automobile back wheel steering hardware particularly.
Background technology
Along with the development of automotive technology, the moving velocity of vehicle is more and more higher, and people have higher requirement to the crossing ability and the road-holding property of automobile, particularly the bend carrying capacity of vehicle and scorch stationarity.For satisfying the requirement in epoch, many automobiles have increased the rear-axle steering system.At present, the rear-axle steering technology has had a lot of application on car and Light-duty Vehicle.As the rear-axle steering technology that in August, 2005, Continental AG was showed in Frankfort, make each wheel of vehicle all have steering capability by many connecting rods rear-axle steering system, not only reduced turn radius and improved the scorch stationarity, and promoted handling and safety.The said firm develops the adjustable whole spindle arm of electric mechanical and two kinds of rear-axle steering mechanisms of the adjustable whole spindle arm of hydraulic pressure.Wherein, electric mechanical is adjustable, and whole spindle arm uses intelligent electric machine to drive the length of adjusting spindle arm, driver's the behaviour that turns to is become electric signal and is transferred to the chassis electronic control unit, control unit is understood comprehensively, is analyzed other various driving situation information, steering order is transferred to intelligent electric machine again and carries out the rear-axle steering operation; Hydraulic pressure is adjustable whole spindle arm provides the power of adjustment with a central pump, controls the length of spindle arm to reach the corner of control rear wheel by the hydraulic ram of adjusting on the spindle arm.In addition, french citroen company has created trailing wheel follow-up steering technology, and the method for realization is to allow the suffered steering effort of outboard wheels makes the follow-up steering piece produce deformation when turning, thereby trailing wheel and front-wheel are in little angle of equidirectional deflection when guaranteeing to turn.
Existing multi-wheeler, for crossing ability and the maneuverability requirement of satisfying vehicle, the employing that has rear-axle steering mechanism, make whole wheels make circular movement when turning to around same instantaneous center of turn as far as possible, do not produce slippage to guarantee wheel flutter.Using the multiple-axle vehicle of rear-axle steering mostly is overland vehicle or the construction machinery and equipment that travels on soft terrain, and the speed of a motor vehicle is lower.This mainly is owing to lack simple and effective Locking Device in the existing rear-axle steering mechanism, in the high vehicle speeds process during tip-tap direction after wheel flutter can produce corresponding rotation, influence high speed and stable traveling, make the maximum speed of vehicle be subjected to very big restriction; When trailing wheel participates in generally not allowing when turning to surpassing 45km/h, and the rear axle steering wheel is not easy to return just to the straight-line travelling position from the hard-over position.Like this, cause in motion stable not good enough of vehicle, particularly when running at high speed, have very big potential safety hazard.
The rear-axle steering system that is adopted on car and the Light-duty Vehicle is not suitable for multi-wheeler.This mainly is because the axle load of multi-wheeler is bigger, and the skid force of wheel is bigger in vehicle ' and steering procedure, if adopt the adjustable rear-axle steering of electronics system, the ability of its system is obviously not enough, and the complexity, the cost that increase system simultaneously improve; If adopt trailing wheel follow-up steering system,, cause the riding stability of vehicle and road-holding property seriously to descend because the influence of wheel side sliding power causes trailing wheel that unnecessary deflection easily takes place.
Summary of the invention
The purpose of this utility model is exactly will provide a kind of can be when running at high speed will the back steering wheel lock to fix on in-line position and when turning the back wheel flutter is moved the hydraulic pressure centering cylinder of unresisted automobile back wheel steering hardware.
For realizing this purpose, the hydraulic pressure centering cylinder of the automobile back wheel steering hardware that the utility model is designed includes cylinder block, and the two ends of described cylinder block are respectively arranged with left and right sides cylinder cover.Be provided with piston rod in the described cylinder block, the medial extremity of described piston rod is provided with annular boss, and the both sides of described annular boss are respectively arranged with left and right sides floating piston, and left and right sides floating piston can be with respect to the piston rod self-movement.The centre of described cylinder block is provided with the interior ring platform with described annular boss free-running fit, the ring platform separates described left and right sides floating piston in its both sides in described, can guarantee the interior Huan Tai both sides location of left and right sides floating piston in the middle of cylinder block by the effect of hydraulic oil on the one hand, said structure can make the annular boss of piston rod be positioned in the middle interior ring platform of cylinder block by left and right sides floating piston on the other hand, also can make piston rod be in quick condition.Form left and right sides oil pocket respectively between described left and right sides floating piston and the left and right sides cylinder cover, offer the fluid passage that links to each other with hydraulic oil control cock in the wheel steering system on the oil pocket of the described left and right sides respectively, described fluid passage is linked to each other with the fuel tank of steering swivel system or link to each other with the high pressure accumulator of steering swivel system by this control cock.Described piston rod passes described end cap of left cyclinder, and its external side end links to each other with left ball pin by left fittings body.Described right oil cylinder end cap links to each other with right ball pin by the right connector body.Described left and right sides ball pin is separately fixed in the rear-axle steering mechanism and vehicle frame bearing of vehicle.
Principle of work of the present utility model is such: when vehicle is in high-speed travel state, do not need rear-axle steering this moment, be full of high pressure oil simultaneously in the left and right sides oil pocket of cylinder block, left and right sides floating piston is locked in piston rod the midway location of cylinder block under the effect of high pressure oil, because piston rod links to each other with rear-axle steering mechanism by the ball pin, so rear-axle steering mechanism also can locate at meta under the promotion of piston rod, make the back wheel flutter get back to in-line position and locking, the stability when guaranteeing high vehicle speeds.And when vehicle is in the rear-axle steering state, this moment, the speed of a motor vehicle was lower, the high pressure oil venting in the left and right sides oil pocket of cylinder block, and left and right sides floating piston is in quick condition, piston rod can drive left and right sides floating piston with the trailing wheel steering hardware and move freely, to the essentially no drag effects of rear-axle steering mechanism.
The utility model has solved the stability problem of running at high speed of the multi-wheeler with rear axle steering function.By hydraulic pressure centering cylinder is set in the automobile back wheel steering hardware, not only can guarantees that the maximum speed of rear axle steering vehicle is not less than 90km/h, and the rear axle steering wheel is returned just to the straight-line travelling position from the hard-over position.Use through the entrucking experiment, proving effect is good.
Description of drawings
Accompanying drawing is a kind of sectional structure scheme drawing of hydraulic pressure centering cylinder of automobile back wheel steering hardware.
The specific embodiment
The utility model is described in further detail below in conjunction with the drawings and specific embodiments:
The hydraulic pressure centering cylinder of the automobile back wheel steering hardware shown in the figure, mainly by cylinder block 5, left and right sides cylinder cover 4,8, piston rod 3, left and right sides floating piston 6,7, left and right joint body 2,2 ' and left and right sides ball pin 1,1 ' etc. form.Left and right sides cylinder cover 4,8 is connected with cylinder block 5 two ends thread seals.The end that piston rod 3 is positioned at cylinder block 5 is provided with annular boss 3a, and left and right sides floating piston 6,7 is installed in the both sides of annular boss 3a respectively.Piston rod 3 can drive left and right sides floating piston 6,7 by annular boss 3a, and left and right sides floating piston 6,7 conversely also can piston rod 3 in addition.An interior ring platform 5a with annular boss 3a free-running fit is also designed in the centre of cylinder block 5, and interior ring platform 5a separates left and right sides floating piston 6,7 in its both sides, and interior ring platform 5a can be used to left and right sides floating piston 6,7 is positioned.
Be formed with left and right sides oil pocket A, B respectively between left and right sides floating piston 6,7 and the left and right sides cylinder cover 4,8, offer the fluid passage P1, the P2 that link to each other with hydraulic oil control cock in the wheel steering system on left and right sides oil pocket A, the B respectively.The shaft of piston rod 3 passes end cap of left cyclinder 4, and its ends that are positioned at outside the cylinder block 5 are threaded with left fittings body 2, and left ball pin 1 is installed in the left fittings body 2.Right oil cylinder end cap 8 and right connector body 2 ' be threaded, right connector body 2 ' in be equipped with right ball pin 1 '.Left and right sides ball pin 1,1 ' and left and right joint body 2,2 ' structure be well known to a person skilled in the art, seldom give unnecessary details in this.
In the middle of annular boss 3a, also have one annular groove, oil pocket C in the middle of this annular groove, cylinder block 5 and left and right sides floating piston 6, the 7 common formations.On interior ring platform 5a, offer the fluid passage T that middle oil pocket C and wheel steering system fuel tank are communicated with all the time.Like this, when left and right sides floating piston 6,7 moves, can effectively avoid the vacuum negative pressure condition of the middle oil pocket C that causes because of volume is airtight, further alleviate the resistance of this hydraulic pressure centering cylinder when servo-actuated and centering process.
When the utility model uses, with left and right sides ball pin 1,1 ' be separately fixed in the rear-axle steering mechanism and vehicle frame bearing of vehicle, ball pin 1,1 ' the bulk error in the time of can compensating this hydraulic pressure centering cylinder and install is set and guarantees its work the time can freely swing.Its concrete working process is as follows:
When the needs rear-axle steering, hydraulic oil control cock in the wheel steering system makes left and right sides oil pocket A, fluid among the B is by fluid passage P1, P2 communicates with the steering swivel system fuel tank, left and right sides oil pocket A, the B pressure release, left and right sides floating piston 6,7 are in quick condition, because the two ends of this hydraulic pressure centering cylinder link to each other with the vehicle frame bearing with rear-axle steering mechanism respectively, therefore its piston rod 3 can be made axial motion with respect to cylinder block 5, and drive left and right sides floating piston 6,7 motions, but when the annular boss 3a of piston rod 3 gets back to meta, left and right sides floating piston 6,7 with piston rod 3 returns, and the resistance of Vehicular turn is very little.
When not needing rear-axle steering, the fluid of steering swivel system mesohigh energy storage is communicated with left and right sides oil pocket A, B by fluid passage P1, P2, left and right sides oil pocket A, B are with pressure, left and right sides floating piston 6,7 is to the interior ring platform 5a direction motion of cylinder block 5 under the effect of high pressure oil, no matter the annular boss 3a of piston rod 3 was in the meta left side or was in meta the right this moment, among the ring platform 5a, left and right sides floating piston 6,7 is also blocked by interior ring platform 5a and no longer continues to move simultaneously in all can being shifted onto by left and right sides floating piston 6,7.Because piston rod 3 is connected with rear-axle steering mechanism, thus rear-axle steering mechanism also is pushed back along with piston rod 3 and therein the position locate.When rear-axle steering mechanism does not work, be that trailing wheel is not when turning to, left and right sides oil pocket A, B communicate with high pressure accumulator in the steering swivel system always, therefore the axial motion of 6,7 pairs of piston rods 3 of left and right sides floating piston plays inhibition, be similar to piston rod 3 is locked in midway location, thereby guarantee the stability and the safety of high vehicle speeds.

Claims (2)

1. the hydraulic pressure centering cylinder of an automobile back wheel steering hardware, include cylinder block (5), the two ends of described cylinder block (5) are respectively arranged with left and right sides cylinder cover (4,8), it is characterized in that: be provided with piston rod (3) in the described cylinder block (5), the medial extremity of described piston rod (3) is provided with annular boss (3a), and the both sides of described annular boss (3a) are respectively arranged with left and right sides floating piston (6,7); The centre of described cylinder block (5) is provided with the interior ring platform (5a) with described annular boss (3a) free-running fit, and described interior ring platform (5a) separates described left and right sides floating piston (6,7) in its both sides; Form left and right sides oil pocket (A, B) respectively between described left and right sides floating piston (6,7) and the left and right sides cylinder cover (4,8), offer the fluid passage (P1, P2) that links to each other with hydraulic oil control cock in the wheel steering system on the described left and right sides oil pocket (A, B) respectively; Described piston rod (3) passes described end cap of left cyclinder (4), and its external side end links to each other with left ball pin (1) by left fittings body (2); Described right oil cylinder end cap (8) links to each other with right ball pin (1 ') by right connector body (2 '); Described left and right sides ball pin (1,1 ') is separately fixed in the rear-axle steering mechanism and vehicle frame bearing of vehicle.
2. the hydraulic pressure centering cylinder of automobile back wheel steering hardware according to claim 1, it is characterized in that: be provided with an annular groove in the middle of the said annular boss (3a), oil pocket (C) in the middle of this annular groove, cylinder block (5) and left and right sides floating piston (6,7) surround offers the fluid passage (T) that oil pocket (C) is communicated with the wheel steering system fuel tank in the middle of making on the said interior ring platform (5a).
CN 200520099777 2005-12-31 2005-12-31 Hydraulic centralizing cylinder of vehicle rear wheel steering mechanism Expired - Fee Related CN2866285Y (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 200520099777 CN2866285Y (en) 2005-12-31 2005-12-31 Hydraulic centralizing cylinder of vehicle rear wheel steering mechanism

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 200520099777 CN2866285Y (en) 2005-12-31 2005-12-31 Hydraulic centralizing cylinder of vehicle rear wheel steering mechanism

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CN2866285Y true CN2866285Y (en) 2007-02-07

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Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102700604A (en) * 2012-06-28 2012-10-03 三一重工股份有限公司 Steering oil cylinder structure, steering device and electric control steering axle
CN103043092A (en) * 2013-01-21 2013-04-17 北京理工大学 Hydraulic centering cylinder with mechanical lockup function
CN104590367A (en) * 2014-12-29 2015-05-06 东风汽车公司 Rear axle steering mechanism of puddle jumper
CN104879342A (en) * 2015-06-16 2015-09-02 中国北方车辆研究所 Rear wheel steering hydraulic cylinder of automobile
CN105292248A (en) * 2015-11-20 2016-02-03 湖北汽车工业学院 Automobile rear wheel steering electromagnetic alignment cylinder and use method thereof
CN105292241A (en) * 2015-11-20 2016-02-03 湖北汽车工业学院 Automobile rear wheel steering hydraulic alignment cylinder and use method thereof
CN105438256A (en) * 2015-01-15 2016-03-30 徐州重型机械有限公司 Steering controlling method and device and crane
CN105774903A (en) * 2016-03-09 2016-07-20 郑州精益达汽车零部件有限公司 Follow-up steering system used for multi-shaft passenger car
CN113276941A (en) * 2021-07-02 2021-08-20 北京汽车集团越野车有限公司 Centering stop device and vehicle

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102700604B (en) * 2012-06-28 2014-04-16 三一重工股份有限公司 Steering oil cylinder structure, steering device and electric control steering axle
CN102700604A (en) * 2012-06-28 2012-10-03 三一重工股份有限公司 Steering oil cylinder structure, steering device and electric control steering axle
CN103043092A (en) * 2013-01-21 2013-04-17 北京理工大学 Hydraulic centering cylinder with mechanical lockup function
CN103043092B (en) * 2013-01-21 2015-04-22 北京理工大学 Hydraulic centering cylinder with mechanical lockup function
CN104590367B (en) * 2014-12-29 2017-04-12 东风汽车公司 Rear axle steering mechanism of puddle jumper
CN104590367A (en) * 2014-12-29 2015-05-06 东风汽车公司 Rear axle steering mechanism of puddle jumper
CN105438256B (en) * 2015-01-15 2017-09-26 徐州重型机械有限公司 Rotating direction control method, device and crane
CN105438256A (en) * 2015-01-15 2016-03-30 徐州重型机械有限公司 Steering controlling method and device and crane
CN104879342A (en) * 2015-06-16 2015-09-02 中国北方车辆研究所 Rear wheel steering hydraulic cylinder of automobile
CN104879342B (en) * 2015-06-16 2017-09-01 中国北方车辆研究所 A kind of automobile back wheel hydraulic steering cylinder
CN105292248A (en) * 2015-11-20 2016-02-03 湖北汽车工业学院 Automobile rear wheel steering electromagnetic alignment cylinder and use method thereof
CN105292241A (en) * 2015-11-20 2016-02-03 湖北汽车工业学院 Automobile rear wheel steering hydraulic alignment cylinder and use method thereof
CN105774903A (en) * 2016-03-09 2016-07-20 郑州精益达汽车零部件有限公司 Follow-up steering system used for multi-shaft passenger car
CN113276941A (en) * 2021-07-02 2021-08-20 北京汽车集团越野车有限公司 Centering stop device and vehicle

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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: 20070207

Termination date: 20141231

EXPY Termination of patent right or utility model