CN205239628U - Automobile rear wheel turns to hydraulic pressure centering jar - Google Patents

Automobile rear wheel turns to hydraulic pressure centering jar Download PDF

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Publication number
CN205239628U
CN205239628U CN201520928974.6U CN201520928974U CN205239628U CN 205239628 U CN205239628 U CN 205239628U CN 201520928974 U CN201520928974 U CN 201520928974U CN 205239628 U CN205239628 U CN 205239628U
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CN
China
Prior art keywords
cylinder body
locked
piston
annular boss
lock
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Expired - Fee Related
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CN201520928974.6U
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Chinese (zh)
Inventor
王保华
邓召文
陈小兵
赵慧勇
王金虎
喻超
冯善坤
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Hubei University of Automotive Technology
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Hubei University of Automotive Technology
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Priority to CN201520928974.6U priority Critical patent/CN205239628U/en
Application granted granted Critical
Publication of CN205239628U publication Critical patent/CN205239628U/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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Abstract

The utility model provides an automobile rear wheel turns to hydraulic pressure centering jar mainly includes centering cylinder body, piston rod, left floating piston, right floating piston, medial extremity department at the piston rod is equipped with annular boss, and left and right floating piston lies in the both sides of annular boss respectively, and the interior middle department of centering cylinder body is equipped with the interior annular boss with annular boss clearance fit, still dying cylinder body, lock including the lock and dying the lower extreme of cylinder body and be fixed in centering cylinder body surface intermediate position one side department, the upper end department that the cylinder body is died to the lock is equipped with the cylinder cap, is equipped with the fluid passageway on the cylinder cap, and the lock is died and is equipped with lock stopper anyway in the lower extreme of cylinder body, the lock anyway the stopper the lower extreme through hydraulic oil stretch into to the centering cylinder body in with annular boss on the cooperation of ring wedge recess locking, the lock is died and is equipped with the lock piston return spring that dies in the cylinder body, the lock die piston return spring both ends respectively with the lock anyway the stopper, the cylinder cap is connected, the gaseous core vent of annular boss intracavity be equipped with the discharge on the cylinder body is died to the lock in, the device is significant to the operational stability who improves the car.

Description

A kind of automobile back wheel steering hydraulic centralizing cylinder
Technical field
The utility model belongs to the servicing unit in multi-wheeler rear-wheel steering system, especially a kind of automobile back wheel steering hydraulic centralizing cylinder.
Background technology
In recent years, along with the fast development of logistics transportation and engineering construction, the large-scale heavy duty commercial car such as civilian truck, large-scale logistic car, special-purpose vehicle, because cost of transportation is low, efficiency is high, become the first-selection of highway transportation gradually. This heavy vehicle quality is large, moment of inertia is large, and barycenter is high, wheelbase is large, and car load, more than three axles, and has multiple non-steering spindles, and it is very urgent that it has high maneuverability, response fast, 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. The executing agency of electrical-control hydraulic steering adopts valve-controlled cylinder type electric-controlled hydraulic position servo closed-loop control system more, generally only limits to run at a low speed operating mode, and this is mainly in rear-axle steering mechanism, to lack simple and effective locking device. In the time of high vehicle speeds, can there is shimmy phenomenon in tip-tap steering wheel trailing wheel, thereby affect the control stability of high vehicle speeds. Patent CN200520099774 is for addressing this problem, and proposed the hydraulic centralizing cylinder of a kind of rear-axle steering mechanism. This centralizing cylinder piston rod is set up and is contacted by mechanical connection and rear-axle steering mechanism, and piston rod, under the effect of centralizing cylinder positive stop lug boss, can make trailing wheel remain on centre position, and the hydraulic pressure of realizing trailing wheel is locked. This device can be realized accurate trailing wheel alignment function, but lacks mechanical locking device, and automobile is in the time running into large impact, and slight movement likely occurs piston rod, causes trailing wheel that shimmy phenomenon occurs, can not be completely locked; It is locked that this device relies on hydraulic pressure completely in addition, needs centralizing cylinder both sides oil pocket to keep high pressure conditions always, in the time that hydraulic system pressure reduces or lost efficacy, directly loses trailing wheel locking function, has a strong impact on the control stability of heavy-duty car, has very large potential safety hazard.
Summary of the invention
The utility model provides a kind of automobile back wheel steering hydraulic centralizing cylinder, and object is the locked problem of hydraulic pressure of centralizing cylinder that can only realize in order to solve prior art, and has certain potential safety hazard.
In order to solve the problems of the technologies described above, the technical solution of the utility model is: a kind of automobile back wheel steering hydraulic centralizing cylinder, comprises centering cylinder body, left fluid passage, right fluid passage, piston rod, left floating piston, right floating piston, left connector, fairlead, cylinder cap, right connector; Medial extremity place at piston rod is provided with annular boss, left floating piston, right floating piston lay respectively at the both sides of annular boss, middle in centering cylinder body is provided with the interior annular boss with annular boss matched in clearance, it is characterized in that: on the surface of annular boss, be provided with ring wedge-shaped impression; One side place, centre position, centralizing cylinder surface is fixed in the lower end that also comprises locked cylinder body, locked cylinder body, in the lower end of locked cylinder body, be provided with locked piston, the upper end of locked cylinder body is provided with cylinder cap, cylinder cap is provided with fluid passage, the lower end of locked piston is stretched in centering cylinder body and is coordinated with the ring wedge-shaped impression locking on annular boss by hydraulic oil, in locked cylinder body, be provided with locked piston return spring, the two ends of locked piston return spring are connected with locked piston, cylinder cap by connector respectively; One side place, centralizing cylinder surface at the locked cylinder body plane of symmetry is provided with steam vent, and steam vent communicates with the chamber of the interior annular boss of centering cylinder body, is provided with venting plug in steam vent.
Technique scheme is further improved, described centering cylinder body centre position place is provided with screwed hole, locked cylinder body lower end stretches in centering cylinder body by screwed hole, locked cylinder body and centering cylinder body are threaded connection, locked cylinder body is provided with annular stop boss outward, and annular stop boss is realized spacing cooperation with screwed hole. Advantage: 1. position limiting structure avoids oil cylinder to contact with piston rod piston; In the time that bolt is screwed to the end, between the lower end of locked cylinder body and piston rod annular boss, still have certain interval, make it not interfere. 2. both bonding strength and job stability have been improved.
Technique scheme is further improved, between the locked piston of described locked cylinder body contact, cylinder cap, be equipped with O-ring seal, realize the sealing of hydraulic oil, improve the stability of work.
Beneficial effect: 1. the utility model has increased important mechanical locking function on the basis of patent CN2005200997774, ensure that automobile all can not occur in the time running at high speed and be subject to large impact that piston rod moves left and right and the wheel wobble phenomenon that causes is also the locked a kind of multi-ensuring of centralizing cylinder piston rod simultaneously. 2. locked piston is realized and being closely cooperated with ring wedge-shaped impression, stability and the positioning precision of work that provide high. Even if 3. locked piston is along with the wearing and tearing that are subject to a certain extent that increase of the number of times using, also can realizes and closely cooperating with ring wedge-shaped impression. This device have advantages of simple in structure, be convenient to safeguard, production cost is low.
Brief description of the drawings
Fig. 1 is sectional structure schematic diagram of the present utility model.
Wherein, 1-centering cylinder body, 2-left fluid passage, 3-right fluid passage, 4-piston rod, 5-left floating piston, 6-right floating piston, 7-fairlead, 8-cylinder cap, 9-left connector, 10-right connector, 11-annular boss, 12-ring wedge-shaped impression, 13-left oil pocket, 14-right oil pocket, 15-interior annular boss, 16-locked cylinder body, 17-locked piston, 18-cylinder cap, 19-fluid passage, 20-connector, 21-locked piston return spring, 22-venting plug, 23-annular stop boss.
Detailed description of the invention
Below in conjunction with drawings and embodiments, the utility model is described further:
As shown in Figure 1, a kind of automobile back wheel steering hydraulic centralizing cylinder, comprises centering cylinder body 1, left fluid passage 2, right fluid passage 3, piston rod 4, left floating piston 5, right floating piston 6, fairlead 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, medial extremity place at piston rod 4 is provided with annular boss 11, on the surface of annular boss 11, be provided with ring wedge-shaped impression 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 centering cylinder body 1 lip-deep left fluid passage 2 in two ends, right fluid passage 3 communicates, left floating piston 5, right floating piston 6 lays respectively at the both sides of annular boss 11, it is left floating piston 5, right floating piston 6 lays respectively in the left oil pocket 13 of centering cylinder body and in right oil pocket 14, annular boss 11 can be to a left side, right floating piston positions, the middle of centering cylinder body is provided with the interior annular boss 15 with annular boss 11 matched in clearance, annular boss 11 on piston rod 4 can promote left through interior annular boss 15, right floating piston, otherwise left, right floating piston also can be under the effect of hydraulic oil piston rod 4, fairlead 7, cylinder cap 8 is installed on centering cylinder body 1 left end port from the inside to the outside successively, piston rod 4 outboard ends are through fairlead 7 and cylinder cap 8, and matched in clearance with it, the outboard 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, one side place, the surperficial centre position of centering cylinder body 1 is fixed in the lower end that also comprises locked cylinder body 16, locked cylinder body 16, in the lower end of locked cylinder body 16, be provided with locked piston 17, locked piston 17 can slide axially along locked cylinder body 16, and after location and installation, the axis of locked piston 17 is vertical with wedge-shaped impression 12 axis on piston rod annular boss, the upper end of locked cylinder body 16 is provided with the cylinder cap 18 being threaded, cylinder cap 18 is provided with fluid passage 19, the lower end of locked piston 17 is stretched in centering cylinder body 1 and is coordinated with ring wedge-shaped impression 12 lockings on annular boss 11 by hydraulic oil, and locked piston 17 adapts with ring wedge-shaped impression 12, on the inner face of locked piston 17 and cylinder cap 18, be equipped with connector 20, be provided with locked piston return spring 21 in locked cylinder body 16, locked piston return spring 21 articulates with two connectors 20 respectively, one side place, centralizing cylinder surface at locked cylinder body 1 plane of symmetry is provided with steam vent, and steam vent communicates with the chamber of the interior annular boss 15 of centering cylinder body, is provided with venting plug 22 in steam vent.
Described centering cylinder body centre position place is provided with screwed hole, locked cylinder body lower end stretches in centering cylinder body by screwed hole, locked cylinder body and centering cylinder body are threaded connection, and locked cylinder body is provided with annular stop boss 23 outward, and annular stop boss 23 is realized spacing cooperation with screwed hole. Advantage: 1. position limiting structure avoids oil cylinder to contact with piston rod piston; In the time that bolt is screwed to the end, between the lower end of locked cylinder body and piston rod annular boss, still have certain interval, make it not interfere. 2. both bonding strength and job stability have been improved.
The cylinder cap of described centering cylinder body contact, right connector, fairlead, left and right floating piston and and the locked piston that contacts of locked cylinder body, cylinder cap between be equipped with O-ring seal, 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 is connected by pull bar with rear-axle steering mechanism left steering joint arm, and the right connector at centering cylinder body right-hand member place is connected with vehicle frame; In the time that 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, make the convex annular you of piston rod be placed in the centre position of centering cylinder body, now locked cylinder body feed liquor force feed, locked piston moves downward under the effect of hydraulic oil, and contact realization machinery with the wedge-shaped impression on piston rod annular boss locked, make piston rod remain on centre position, thereby make wheel locking in straight-line travelling position; In the time that trailing wheel need to turn to, locked cylinder body sheds operating oil pressure, and locked piston is retracted in locked cylinder body 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. On centering cylinder body, offer steam vent, the air in annular groove is discharged by venting plug under pressure, can not form vacuum, to piston rod move left and right and locked piston to stretch out retraction drag effects less.
The part that do not elaborate in this description is the known technology of this area.

Claims (3)

1. an automobile back wheel steering hydraulic centralizing cylinder, comprises centering cylinder body, left fluid passage, right fluid passage, piston rod, left floating piston, right floating piston, left connector, fairlead, cylinder cap, right connector; Medial extremity place at piston rod is provided with annular boss, left floating piston, right floating piston lay respectively at the both sides of annular boss, middle in centering cylinder body is provided with the interior annular boss with annular boss matched in clearance, it is characterized in that: on the surface of annular boss, be provided with ring wedge-shaped impression; One side place, centre position, centralizing cylinder surface is fixed in the lower end that also comprises locked cylinder body, locked cylinder body, in the lower end of locked cylinder body, be provided with locked piston, the upper end of locked cylinder body is provided with cylinder cap, cylinder cap is provided with fluid passage, the lower end of locked piston is stretched in centering cylinder body and is coordinated with the ring wedge-shaped impression locking on annular boss by hydraulic oil, in locked cylinder body, be provided with locked piston return spring, the two ends of locked piston return spring are connected with locked piston, cylinder cap by connector respectively; One side place, centralizing cylinder surface at the locked cylinder body plane of symmetry is provided with steam vent, and steam vent communicates with the chamber of the interior annular boss of centering cylinder body, is provided with venting plug in steam vent.
2. a kind of automobile back wheel steering hydraulic centralizing cylinder according to claim 1, it is characterized in that: described centering cylinder body centre position place is provided with screwed hole, locked cylinder body lower end stretches in centering cylinder body by screwed hole, locked cylinder body and centering cylinder body are threaded connection, locked cylinder body is provided with annular stop boss outward, and annular stop boss is realized spacing cooperation with screwed hole.
3. according to a kind of automobile back wheel steering hydraulic centralizing cylinder described in claim 1 or 2, it is characterized in that: between the locked piston of described locked cylinder body contact, cylinder cap, be equipped with O-ring seal.
CN201520928974.6U 2015-11-20 2015-11-20 Automobile rear wheel turns to hydraulic pressure centering jar Expired - Fee Related CN205239628U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201520928974.6U CN205239628U (en) 2015-11-20 2015-11-20 Automobile rear wheel turns to hydraulic pressure centering jar

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201520928974.6U CN205239628U (en) 2015-11-20 2015-11-20 Automobile rear wheel turns to hydraulic pressure centering jar

Publications (1)

Publication Number Publication Date
CN205239628U true CN205239628U (en) 2016-05-18

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
CN106523470A (en) * 2016-12-08 2017-03-22 泸州长江液压密封件有限公司 Locking device suitable for piston rod
CN108045432A (en) * 2018-01-16 2018-05-18 徐工集团工程机械有限公司 Steering cylinder, hydraulic power-assist steering system turn to vehicle bridge and vehicle

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
CN106523470A (en) * 2016-12-08 2017-03-22 泸州长江液压密封件有限公司 Locking device suitable for piston rod
CN108045432A (en) * 2018-01-16 2018-05-18 徐工集团工程机械有限公司 Steering cylinder, hydraulic power-assist steering system turn to vehicle bridge and vehicle
CN108045432B (en) * 2018-01-16 2023-08-25 江苏徐工国重实验室科技有限公司 Steering cylinder, hydraulic power steering system, steering axle 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
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20160518

Termination date: 20171120