CN205239628U - Automobile rear wheel turns to hydraulic pressure centering jar - Google Patents
Automobile rear wheel turns to hydraulic pressure centering jar Download PDFInfo
- 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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- cylinder body
- locked
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- cylinder
- annular boss
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- 238000007667 floating Methods 0.000 claims abstract description 24
- 239000010720 hydraulic oil Substances 0.000 claims abstract description 10
- 239000012530 fluid Substances 0.000 claims description 15
- 238000013022 venting Methods 0.000 claims description 5
- 239000003921 oil Substances 0.000 abstract description 15
- 230000000694 effects Effects 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 4
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- 238000000034 method Methods 0.000 description 3
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- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
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Abstract
一种汽车后轮转向液压对中缸，主要包括对中缸体、活塞杆、左浮动活塞、右浮动活塞；在活塞杆的内侧端处设有环形凸台，左、右浮动活塞分别位于环形凸台的两侧，对中缸体内的中间处设有与环形凸台间隙配合的内环形凸台；还包括锁死缸体、锁死缸体的下端固定于对中缸体表面中间位置一侧处，锁死缸体的上端处设有缸盖，缸盖上设有油液通道，锁死缸体的下端内设有锁死活塞，锁死活塞的下端通过液压油伸入至对中缸体内与环形凸台上的环楔形凹槽锁止配合，锁死缸体内设有锁死活塞回位弹簧，锁死活塞回位弹簧的两端分别与锁死活塞、缸盖连接；在锁死缸体上设有排出内环形凸台腔内气体的排气塞；该装置对提高汽车的操作稳定性具有重要意义。
An automobile rear wheel steering hydraulic centering cylinder mainly includes a centering cylinder body, a piston rod, a left floating piston, and a right floating piston; an annular boss is arranged at the inner end of the piston rod, and the left and right floating pistons are respectively located in the ring On both sides of the boss, the middle of the centering cylinder is provided with an inner annular boss that fits with the annular boss; it also includes a locking cylinder, and the lower end of the locking cylinder is fixed in the middle of the surface of the centering cylinder On one side, the upper end of the locking cylinder is provided with a cylinder cover, the cylinder cover is provided with an oil passage, and the lower end of the locking cylinder is provided with a locking piston, and the lower end of the locking piston extends into the opposite side through the hydraulic oil. The middle cylinder body is locked and matched with the ring wedge-shaped groove on the annular boss, and the deadlock piston return spring is arranged in the deadlock cylinder body, and the two ends of the deadlock piston return spring are respectively connected with the deadlock piston and the cylinder head ; There is an exhaust plug on the locking cylinder to discharge the gas in the cavity of the inner annular boss; this device is of great significance for improving the operation stability of the automobile.
Description
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.
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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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520928974.6U Expired - Fee Related CN205239628U (en) | 2015-11-20 | 2015-11-20 | Automobile rear wheel turns to hydraulic pressure centering jar |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205239628U (en) |
Cited By (3)
| 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 |
-
2015
- 2015-11-20 CN CN201520928974.6U patent/CN205239628U/en not_active Expired - Fee Related
Cited By (4)
| 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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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: 20160518 Termination date: 20171120 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |