CN105292241A - Automobile rear wheel steering hydraulic alignment cylinder and use method thereof - Google Patents
Automobile rear wheel steering hydraulic alignment cylinder and use method thereof Download PDFInfo
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- CN105292241A CN105292241A CN201510805888.0A CN201510805888A CN105292241A CN 105292241 A CN105292241 A CN 105292241A CN 201510805888 A CN201510805888 A CN 201510805888A CN 105292241 A CN105292241 A CN 105292241A
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Abstract
The invention provides an automobile rear wheel steering hydraulic alignment cylinder and a use method thereof. The cylinder mainly comprises an alignment cylinder body, a piston rod, a left floating piston and a right floating piston. An annular boss is arranged at the end of the inner side of the piston rod. The left floating piston and the right floating piston are located on the two sides of the annular boss respectively. An inner annular boss in clearance fit with the annular boss is arranged in the middle of the interior of the alignment cylinder body. The cylinder further comprises a locking cylinder body, the lower end of the locking cylinder body is fixed to one side of the middle of the surface of the alignment cylinder body, a cylinder cover is arranged at the upper end of the locking cylinder body and is provided with an oil channel, a locking piston is arranged in the lower end of the locking cylinder body, the lower end of the locking piston extends into the alignment cylinder body through hydraulic oil and is in locking fit with an annular wedge-shaped groove in the annular boss, a locking piston return spring is arranged in the locking cylinder body, and the two ends of the locking piston return spring are connected with the locking piston and the cylinder cover respectively; an exhaust plug used for exhausting gas in a cavity of the inner annular boss is arranged on the locking cylinder body. The automobile rear wheel steering hydraulic alignment cylinder plays an important role in improving operation stability of an automobile.
Description
Technical field
The invention belongs to the auxiliary device in multi-wheeler rear-wheel steering system, especially a kind of automobile back wheel steering hydraulic centralizing cylinder and using method thereof.
Background technology
In recent years, along with the fast development of logistics transportation and engineering construction, the large-scale heavy duty commercial vehicle/comm..vehicles such as civilian truck, large-scale logistic car, special vehicle, because traffic cost is low, efficiency is high, become the first-selection of road transport gradually.This heavy-duty vehicle quality is large, moment of inertia large, and barycenter is high, wheelbase large, and car load more than three axles, and has multiple non-steering shaft, and it is very urgent that it has high maneuverability, fast response, cross-country traveling requirement, and rear-axle steering technology is arisen at the historic moment.There is the defect such as difficult arrangement, very flexible in traditional mechanical type rear-axle steering, there is hydraulic oil leakage problem in fluid pressure type rear-wheel steering system, what electric controlling and engine driving rear-wheel steering system provided turns to thrust less, and therefore, electrical-control hydraulic rear-wheel steering system becomes the focus of research.Actuating unit many employings valve-controlled cylinder type electric-controlled hydraulic position servo closed loop control system of electrical-control hydraulic steering swivel system, is generally only limitted to low speed driving operating mode, and this mainly lacks simple and effective locking device in rear-axle steering mechanism.When the vehicle runs at a high speed, can there is shimmy phenomenon in tip-tap bearing circle trailing wheel, thus affect the road-holding property of high vehicle speeds.Patent CN200520099774, for addressing this problem, proposes a kind of hydraulic centralizing cylinder of rear-axle steering mechanism.This centralizing cylinder piston rod is set up by mechanical connection and rear-axle steering mechanism and is contacted, and piston rod is under the effect of centralizing cylinder positive stop lug boss, and can trailing wheel be made to remain on midway location, the hydraulic pressure realizing trailing wheel be locked.This device can realize accurate trailing wheel alignment function, but lacks mechanical locking device, and automobile is when running into large impact, and slight movement likely occurs piston rod, causes trailing wheel that shimmy phenomenon occurs, can not be completely locked; To rely on hydraulic pressure completely locked for this device in addition, needs centralizing cylinder both sides oil pocket to keep high pressure conditions always, and when hydraulic system pressure reduces or lost efficacy, directly forfeiture trailing wheel locking function, has a strong impact on the road-holding property of heavy motor vehicle, there is very large potential safety hazard.
Summary of the invention
The invention provides a kind of automobile back wheel steering hydraulic centralizing cylinder and using method thereof, object can only realize the locked problem of the hydraulic pressure of centralizing cylinder to solve prior art, and have certain potential safety hazard.
In order to solve the problems of the technologies described above, technical scheme of the present invention is: a kind of automobile back wheel steering hydraulic centralizing cylinder, comprises centering cylinder body, left oil passage, right oil passage, piston rod, left floating piston, right floating piston, left connector, orienting sleeve, cylinder cap, right connector; Annular boss is provided with at the medial extremity place of piston rod, left floating piston, right floating piston lay respectively at the both sides of annular boss, middle in centering cylinder body is provided with and annular boss in annular boss free-running fit, it is characterized in that: on the surface of annular boss, be provided with ring wedge-shaped impression; Also comprise locked cylinder body, midway location side, centralizing cylinder surface place is fixed in the lower end of locked cylinder body, locked piston is provided with in the lower end of locked cylinder body, the upper end of locked cylinder body is provided with cylinder cap, cylinder cap is provided with oil passage, the lower end of locked piston is stretched in centering cylinder body by hydraulic oil and coordinates with the ring wedge-shaped impression locking on annular boss, and be provided with locked piston return spring in locked cylinder body, the two ends of locked piston return spring are connected with locked piston, cylinder cap respectively by attaching parts; Be provided with deflation hole at the side place, centralizing cylinder surface of the locked cylinder body plane of symmetry, deflation hole communicates with the interior shape platform chamber in centering cylinder body, is provided with air venting plug in deflation hole.
Technique scheme is further improved, described centering cylinder body middle position is provided with tapped bore, locked oil cylinder lower end stretches in centering and centering cylinder body by tapped bore, locked oil cylinder and centering cylinder body are threaded connection, be provided with annular stop boss outside locked oil cylinder, annular stop boss and tapped bore realize spacing cooperation.Advantage: 1. position limiting structure avoids oil cylinder to contact with plunger stem flange; Still have certain interval when bolt is screwed to the end between the lower end of locked oil cylinder and piston rod annular boss, make it not interfere.2. improve both Joint strenght and working stability.
Technique scheme is further improved, is equipped with grommet type seals between the locked piston that described locked oil cylinder contacts, cylinder cap, realizes the sealing of hydraulic oil, improve the stability of work.
The using method of automobile back wheel steering hydraulic centralizing cylinder: the connector on piston rod and rear-axle steering mechanism left steering are saved arm and be connected by pull bar, and the right connector at centering cylinder body right-hand member place is connected with vehicle frame; When trailing wheel needs centering, left oil pocket in centering cylinder body and right oil pocket oil-feed, left floating piston and right floating piston drive piston rod under the effect of hydraulic oil, the convex annular you of piston rod is made to be placed in the midway location of centering cylinder body, now locked oil cylinder feed liquor force feed, locked piston at the moved downward of hydraulic oil, and contact with the wedge-shaped impression on piston rod annular boss realize machinery locked, make piston rod remain on midway location, thus make wheel locking in straight-line travelling position; When trailing wheel needs to turn to, locked oil cylinder sheds operating oil pressure, and locked piston is retracted in locked oil cylinder under the pulling force of locked piston return spring, and then centralizing cylinder sheds operating oil pressure, and piston rod does follow-up motion under the effect of rear-axle steering mechanism.
Beneficial effect: 1. the present invention adds important mechanical locking function on the basis of patent CN2005200997774, ensure that automobile all piston rod sway can not occur when running at high speed and be subject to large impact and the wheel fight phenomenon that causes, be also the locked a kind of multi-ensuring of centralizing cylinder piston rod simultaneously.2. locked piston and ring wedge-shaped impression realize closely cooperating, and provide stability and the positioning precision of height work.Even if 3. locked piston increasing by wearing and tearing to a certain extent along with the number of times used, also can realize closely cooperating with ring wedge-shaped impression.4. this device have structure simple, be convenient to the advantage safeguarded, productive costs is low.
Accompanying drawing explanation
Fig. 1 is sectional structure schematic diagram of the present invention.
Wherein, 1-centering cylinder body, 2-left oil passage, 3-right oil passage, 4-piston rod, 5-left floating piston, 6-right floating piston, 7-orienting sleeve, 8-cylinder cap, 9-left connector, 10-right connector, 11-annular boss, 12-ring wedge-shaped impression ring, 13-left oil pocket, 14-right oil pocket, 14-right oil pocket, 14-right oil pocket, 14-right oil pocket, 14-right oil pocket, 14-right oil pocket, 15-interior annular boss, 16-locked cylinder body, 17-locked piston, 18-cylinder cap, 19-oil passage, 20-attaching parts, 21-locked piston return spring, 22-air venting plug, 23-annular stop boss.
Detailed description of the invention
Below in conjunction with drawings and embodiments, the present invention will be further described:
As shown in Figure 1, a kind of automobile back wheel steering hydraulic centralizing cylinder, comprises centering cylinder body 1, left oil passage 2, right oil passage 3, piston rod 4, left floating piston 5, right floating piston 6, orienting sleeve 7, cylinder cap 8, left connector 9, right connector 10, the inner of piston rod 4 is arranged in centering cylinder body 1 left end, annular boss 11 is provided with at the medial extremity place of piston rod 4, the surface of annular boss 11 is provided with ring wedge-shaped impression ring 12, annular boss 11 makes the inner chamber of centering cylinder body 1 be divided into left oil pocket 13 and right oil pocket 14, left oil pocket 13 and right oil pocket 14 respectively with the left oil passage 2 on surface, centering cylinder body 1 two ends, right oil passage 3 communicates, left floating piston 5, right floating piston 6 lays respectively at the both sides of annular boss, i.e. left floating piston 5, the left oil pocket 13 that right floating piston 6 lays respectively at centering cylinder body is interior with in right oil pocket 14, annular boss 11 can to a left side, right floating piston positions, the middle of centering cylinder body is provided with and annular boss 15 in annular boss 11 free-running fit, annular boss 11 on piston rod 4 can promote a left side through interior annular boss 15, right floating piston, otherwise it is left, right floating piston also can under the effect of high pressure oil piston rod 4, orienting sleeve 7, cylinder cap 8 is installed on centering cylinder body 1 left end port from the inside to the outside successively, piston rod 4 left-hand end is through orienting sleeve 7 and cylinder cap 8, and free-running fit with it, the external side end of piston rod 4 is fixedly connected with left connector 9, the right-hand member of centering cylinder body 1 is fixedly connected with right connector 10, also comprise locked cylinder body 16, the lower end of locked cylinder body 16 is fixed on centering cylinder body 1 surperficial midway location side place, locked piston 17 is provided with in the lower end of locked cylinder body 16, locked piston 17 can slide axially along locked cylinder body 16, wedge-shaped impression 12 axes normal after location and installation on the axis of locked piston 17 and piston rod annular boss, the upper end of locked cylinder body 16 is provided with the cylinder cap 18 be threaded, cylinder cap 18 is provided with oil passage 19, the lower end of locked piston 17 is stretched in centering cylinder body 1 by hydraulic oil and coordinates with ring wedge-shaped impression 12 locking on annular boss, and locked piston 17 and ring wedge-shaped impression 12 adapt, the inner end surface of locked piston 17 and cylinder cap 18 is equipped with attaching parts 20, is provided with locked piston return spring 21 in locked cylinder body 16, locked piston return spring 21 mounts with two attaching partss 20 respectively, be provided with deflation hole at the side place, centralizing cylinder surface of locked cylinder body 1 plane of symmetry, deflation hole communicates with the interior shape platform chamber in centering cylinder body, is provided with air venting plug 22 in deflation hole.
Described centering cylinder body middle position is provided with tapped bore, locked oil cylinder lower end stretches in centering and centering cylinder body by tapped bore, locked oil cylinder and centering cylinder body are threaded connection, and are provided with annular stop boss 23 outside locked oil cylinder, and annular stop boss 23 and tapped bore realize spacing cooperation.Advantage: 1. position limiting structure avoids oil cylinder to contact with plunger stem flange; Still have certain interval when bolt is screwed to the end between the lower end of locked oil cylinder and piston rod annular boss, make it not interfere.2. improve both Joint strenght and working stability.
Be equipped with grommet type seals between the cylinder cap of described centering cylinder body contact, right connector, orienting sleeve, left and right floating piston and the locked piston contacted with locked oil cylinder, cylinder cap, realize the sealing of hydraulic oil.
A kind of using method of automobile back wheel steering hydraulic centralizing cylinder: as shown in Figure 1, the connector on piston rod and rear-axle steering mechanism left steering are saved arm and are connected by pull bar, and the right connector at centering cylinder body right-hand member place is connected with vehicle frame; When trailing wheel needs centering, left and right oil pocket oil-feed in centering cylinder body, left and right floating piston drives piston rod under the effect of hydraulic oil, the convex annular you of piston rod is made to be placed in the midway location of centering cylinder body, now locked oil cylinder feed liquor force feed, locked piston at the moved downward of hydraulic oil, and contact with the wedge-shaped impression on piston rod annular boss realize machinery locked, make piston rod remain on midway location, thus make wheel locking in straight-line travelling position; When trailing wheel needs to turn to, locked oil cylinder sheds operating oil pressure, and locked piston is retracted in locked oil cylinder under the pulling force of locked piston return spring, and then centralizing cylinder sheds operating oil pressure, and piston rod does follow-up motion under the effect of rear-axle steering mechanism.Centering cylinder body offers deflation hole, and the air in annular groove is discharged by air venting plug under pressure, can not form vacuum, to the sway of piston rod and locked piston to stretch out retraction drag effects less.
Do not elaborate in this specification sheets part, is the known technology of this area.
Claims (4)
1. an automobile back wheel steering hydraulic centralizing cylinder, comprises centering cylinder body, left oil passage, right oil passage, piston rod, left floating piston, right floating piston, left connector, orienting sleeve, cylinder cap, right connector; Annular boss is provided with at the medial extremity place of piston rod, left floating piston, right floating piston lay respectively at the both sides of annular boss, middle in centering cylinder body is provided with and annular boss in annular boss free-running fit, it is characterized in that: on the surface of annular boss, be provided with ring wedge-shaped impression; Also comprise locked cylinder body, midway location side, centralizing cylinder surface place is fixed in the lower end of locked cylinder body, locked piston is provided with in the lower end of locked cylinder body, the upper end of locked cylinder body is provided with cylinder cap, cylinder cap is provided with oil passage, the lower end of locked piston is stretched in centering cylinder body by hydraulic oil and coordinates with the ring wedge-shaped impression locking on annular boss, and be provided with locked piston return spring in locked cylinder body, the two ends of locked piston return spring are connected with locked piston, cylinder cap respectively by attaching parts; Be provided with deflation hole at the side place, centralizing cylinder surface of the locked cylinder body plane of symmetry, deflation hole communicates with the interior shape platform chamber in centering cylinder body, is provided with air venting plug in deflation hole.
2. a kind of automobile back wheel steering hydraulic centralizing cylinder according to claim 1, it is characterized in that: described centering cylinder body middle position is provided with tapped bore, locked oil cylinder lower end stretches in centering and centering cylinder body by tapped bore, locked oil cylinder and centering cylinder body are threaded connection, be provided with annular stop boss outside locked oil cylinder, annular stop boss and tapped bore realize spacing cooperation.
3. a kind of automobile back wheel steering hydraulic centralizing cylinder according to claim 1 or 2, is characterized in that: be equipped with grommet type seals between the locked piston that described locked oil cylinder contacts, cylinder cap.
4. the using method of automobile back wheel steering hydraulic centralizing cylinder according to claim 1: the connector on piston rod and rear-axle steering mechanism left steering are saved arm and be connected by pull bar, and the right connector at centering cylinder body right-hand member place is connected with vehicle frame; When trailing wheel needs centering, left oil pocket in centering cylinder body and right oil pocket oil-feed, left floating piston and right floating piston drive piston rod under the effect of hydraulic oil, the convex annular you of piston rod is made to be placed in the midway location of centering cylinder body, now locked oil cylinder feed liquor force feed, locked piston at the moved downward of hydraulic oil, and contact with the wedge-shaped impression on piston rod annular boss realize machinery locked, make piston rod remain on midway location, thus make wheel locking in straight-line travelling position; When trailing wheel needs to turn to, locked oil cylinder sheds operating oil pressure, and locked piston is retracted in locked oil cylinder under the pulling force of locked piston return spring, and then centralizing cylinder sheds operating oil pressure, and piston rod does follow-up motion under the effect of rear-axle steering mechanism.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510805888.0A CN105292241A (en) | 2015-11-20 | 2015-11-20 | Automobile rear wheel steering hydraulic alignment cylinder and use method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510805888.0A CN105292241A (en) | 2015-11-20 | 2015-11-20 | Automobile rear wheel steering hydraulic alignment cylinder and use method thereof |
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| CN105292241A true CN105292241A (en) | 2016-02-03 |
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| CN201510805888.0A Pending CN105292241A (en) | 2015-11-20 | 2015-11-20 | Automobile rear wheel steering hydraulic alignment cylinder and use method thereof |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106515846A (en) * | 2016-12-31 | 2017-03-22 | 湖北汽车工业学院 | Electromagnetic drive locking separated hydraulic centering cylinder |
| CN108757636A (en) * | 2018-09-10 | 2018-11-06 | 江阴市洪腾机械有限公司 | A kind of plunger piston fluid pressure cylinder of intermediate position oil inlet |
| CN110469559A (en) * | 2019-09-04 | 2019-11-19 | 中冶赛迪技术研究中心有限公司 | A kind of unidirectional mechanical locked hydraulic cylinder |
| CN111976829A (en) * | 2020-08-27 | 2020-11-24 | 徐工集团工程机械有限公司 | Full-hydraulic steering vehicle and steering method of full-hydraulic steering vehicle |
| CN114109958A (en) * | 2021-09-30 | 2022-03-01 | 中国北方车辆研究所 | Hydraulic steering centering oil cylinder |
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| JP2006308031A (en) * | 2005-04-28 | 2006-11-09 | Iseki & Co Ltd | Dust seal device for cylinder |
| CN2866285Y (en) * | 2005-12-31 | 2007-02-07 | 中国三江航天工业集团公司 | Hydraulic centralizing cylinder of vehicle rear wheel steering mechanism |
| CN104564897A (en) * | 2014-12-29 | 2015-04-29 | 东风汽车公司 | Integrated type driving and centering hydraulic cylinder |
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Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| DE19647472A1 (en) * | 1996-11-16 | 1998-05-20 | Zahnradfabrik Friedrichshafen | Pneumatic or hydraulic servomotor with a shutdown device |
| JP2006308031A (en) * | 2005-04-28 | 2006-11-09 | Iseki & Co Ltd | Dust seal device for cylinder |
| CN2866285Y (en) * | 2005-12-31 | 2007-02-07 | 中国三江航天工业集团公司 | Hydraulic centralizing cylinder of vehicle rear wheel steering mechanism |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106515846A (en) * | 2016-12-31 | 2017-03-22 | 湖北汽车工业学院 | Electromagnetic drive locking separated hydraulic centering cylinder |
| CN108757636A (en) * | 2018-09-10 | 2018-11-06 | 江阴市洪腾机械有限公司 | A kind of plunger piston fluid pressure cylinder of intermediate position oil inlet |
| CN110469559A (en) * | 2019-09-04 | 2019-11-19 | 中冶赛迪技术研究中心有限公司 | A kind of unidirectional mechanical locked hydraulic cylinder |
| CN110469559B (en) * | 2019-09-04 | 2024-07-09 | 中冶赛迪技术研究中心有限公司 | Unidirectional mechanical locking hydraulic cylinder |
| CN111976829A (en) * | 2020-08-27 | 2020-11-24 | 徐工集团工程机械有限公司 | Full-hydraulic steering vehicle and steering method of full-hydraulic steering vehicle |
| CN111976829B (en) * | 2020-08-27 | 2022-04-05 | 徐工集团工程机械有限公司 | Full-hydraulic steering vehicle and steering method of full-hydraulic steering vehicle |
| CN114109958A (en) * | 2021-09-30 | 2022-03-01 | 中国北方车辆研究所 | Hydraulic steering centering oil cylinder |
| CN114109958B (en) * | 2021-09-30 | 2024-01-30 | 中国北方车辆研究所 | Hydraulic steering centering oil cylinder |
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Application publication date: 20160203 |