CN104930016A - Hydraulic cylinder achieving steering function and return-to-center function - Google Patents
Hydraulic cylinder achieving steering function and return-to-center function Download PDFInfo
- Publication number
- CN104930016A CN104930016A CN201510396807.6A CN201510396807A CN104930016A CN 104930016 A CN104930016 A CN 104930016A CN 201510396807 A CN201510396807 A CN 201510396807A CN 104930016 A CN104930016 A CN 104930016A
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- CN
- China
- Prior art keywords
- piston
- centering
- steering
- cylinder
- oil
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/20—Other details, e.g. assembly with regulating devices
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/08—Characterised by the construction of the motor unit
- F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
Abstract
The invention discloses a hydraulic cylinder achieving a steering function and a return-to-center function. The hydraulic cylinder comprises a cylinder body, a piston rod, a big sleeve, a small sleeve, a first centering piston and a second centering piston. An oil cavity of the cylinder body is divided into a middle cylinder body and a steering cylinder body through a partition wall. The cylinder body is provided with a first oil channel, a second oil channel, a third oil channel, a fourth oil channel and a fifth oil channel. The portion, contained in the steering cylinder body, of the piston rod is provided with a steering piston. The steering piston divides an oil cavity of the steering cylinder body into a left steering oil cavity and a right steering oil cavity. Both the big sleeve and the small sleeve are contained in a centering cylinder body, and the small sleeve is sleeved with the big sleeve. The centering cylinder body is divided by the first centering piston and the second centering piston into a left centering oil cavity and a right centering oil cavity. The hydraulic cylinder can provide steering power for a rear wheel steering mechanism of a four-wheel steering vehicle and can also center the rear wheel steering mechanism of the four-wheel steering vehicle.
Description
Technical field
The present invention relates to oil hydraulic cylinder equipment technical field, particularly relate to one and turn to and return positive bifunctional hydraulic cylinder.
Background technique
Steering reversal mechanism is the critical component in four-wheel steering system.Current four-wheel steering automobile uses back respectively positive cylinder and steering cylinder are just realizing back and turning function, two cover system mounting point demands are large, and meanwhile, installation difficulty is large.
Summary of the invention
Main purpose of the present invention is to provide one to turn to and return positive bifunctional hydraulic cylinder, is intended to the function of integrated time positive cylinder and steering cylinder in one, installs simple simultaneously.
For achieving the above object, the invention provides one and turn to and return positive bifunctional hydraulic cylinder, comprise cylinder body, piston rod, large sleeve, small sleeve, the first centering piston and the second centering piston; Wherein,
The oil pocket of described cylinder body is divided into centralizing cylinder and steering cylinder by next door, described cylinder body offers respectively the first oil passage, the second oil passage, the 3rd oil passage, the 4th oil passage and the 5th oil passage that are connected with hydraulic control valve;
Described piston rod is through described cylinder body and convexedly stretch in the two ends of described cylinder body, and the body of rod of described piston rods contain in steering cylinder is provided with steering piston, and the oil pocket of described steering cylinder is divided into left steering oil pocket and right steering oil pocket by this steering piston;
Described large sleeve and small sleeve are all contained in described centralizing cylinder and described large jacket casing is located at outside described small sleeve, described large sleeve is fixed in described cylinder body, described small sleeve is fixed on described piston rod, gap between described large sleeve and small sleeve is formed with oil pocket, described large sleeve and small sleeve are equipped with positive stop lug boss near the side of described centralizing cylinder, described first centering piston and the second centering piston to be all installed in described centralizing cylinder and to be positioned at the two ends of described positive stop lug boss, described centralizing cylinder is divided into left centering oil pocket and right centering oil pocket by described first centering piston and the second centering piston,
Described first oil passage is communicated with described left steering oil pocket, described second oil passage is communicated with described right steering oil pocket, described 3rd oil passage is communicated with described left centering oil pocket, described 4th oil passage is communicated with described right centering oil pocket, and described 5th oil passage is communicated with the gap between described first centering piston and the positive stop lug boss of the second centering piston.
Preferably, described piston rod and described steering piston are formed in one.
Preferably, the two ends of described cylinder body are all provided with end cap to be sealed by its oil pocket, and the two ends of described piston rod all convexedly stretch in outside end cap described in two, and described end cap and cylinder body removably connect.
Preferably, described large sleeve upper limit boss is equal along the length of its axis with described small sleeve upper limit boss along the length of its axis.
Preferably, described cylinder body is also provided with the leg for being fixed to by oil hydraulic cylinder on frame support outward.
Preferably, described small sleeve is fixed on described piston rod by locking nut.
The oil hydraulic cylinder that the present invention proposes, by arranging centralizing cylinder and steering cylinder makes it have centering and turning function concurrently, suitable steering power can be provided to promote rear-axle steering for four-wheel steering automobile rear-axle steering mechanism on the one hand, make the rear-axle steering mechanism of four-wheel steering automobile return positive centering on the other hand, thus improve stationary performance when four-wheel steering automobile is kept straight on.In addition, the oil hydraulic cylinder that the present invention proposes is compared with the structural type of steering cylinder with the centralizing cylinder installed respectively, and that it has compact structure, with low cost, institute takes up space is little, install simply and the advantage of reliable operation.
Accompanying drawing explanation
Fig. 1 is the sectional structure schematic diagram that the present invention turned to and returned positive bifunctional hydraulic cylinder preferred embodiment;
Fig. 2 is the side-looking structural representation turning to and return positive bifunctional hydraulic cylinder shown in Fig. 1.
In figure, 1-end thread, 2-leg, 3-end cap, 4-cylinder body, 5-steering piston, 6-piston rod, 7-next door, 8-first centering piston, 8 '-the second centering piston, 9-small sleeve, the large sleeve of 10-, 11-locking nut, P1-first oil passage, P2-second oil passage, P3-the 3rd oil passage, P4-the 4th oil passage, T-the 5th oil passage, α-steering cylinder, β-centralizing cylinder, A-left steering oil pocket, B-right steering oil pocket, the left centering oil pocket of C-, the right centering oil pocket of D-.
The realization of the object of the invention, functional characteristics and advantage will in conjunction with the embodiments, are described further with reference to accompanying drawing.
Embodiment
Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
It should be noted that, in describing the invention, term " transverse direction ", " longitudinal direction ", " on ", D score, "front", "rear", "left", "right", " vertically ", " level ", " top ", " end ", " interior ", the orientation of the instruction such as " outward " or position relationship be based on orientation shown in the drawings or position relationship, only the present invention for convenience of description and simplified characterization, be not indicate or imply that the device of indication or element must have specific orientation, with specific azimuth configuration and operation, therefore can not be interpreted as limitation of the present invention.In addition, term " first ", " second " etc. only for describing object, and can not be interpreted as instruction or hint relative importance.
See figures.1.and.2, Fig. 1 is the sectional structure schematic diagram that the present invention turned to and returned positive bifunctional hydraulic cylinder preferred embodiment; Fig. 2 is the side-looking structural representation turning to and return positive bifunctional hydraulic cylinder shown in Fig. 1.
In this preferred embodiment, turn to and return positive bifunctional hydraulic cylinder, comprising cylinder body 4, piston rod 6, large sleeve 10, small sleeve 9 first centering piston 8 and the second centering piston 8 '; Wherein,
The oil pocket of cylinder body 4 is divided into centralizing cylinder β and steering cylinder α (next door 7 and cylinder body 4 are formed in one) by next door 7, cylinder body 4 offers respectively be connected with hydraulic control valve the first oil passage P1, the second oil passage P2, the 3rd oil passage P3, the 4th oil passage P4 and the 5th oil passage T;
Piston rod 6 is through cylinder body 4 and convexedly stretch in the two ends of cylinder body 4, and piston rod 6 body of rod be contained in steering cylinder α is provided with steering piston 5, and the oil pocket of steering cylinder α is divided into left steering oil pocket A and right steering oil pocket B by this steering piston 5;
Large sleeve 10 and small sleeve 9 are all contained in centralizing cylinder β and large sleeve 10 is sheathed on outside small sleeve 9, large sleeve 10 is fixed in cylinder body 4, small sleeve 9 is fixed on piston rod 6 (thus small sleeve 9 can follow piston rod 6 slide relative to cylinder body 4 together), gap between large sleeve 10 and small sleeve 9 is formed with oil pocket, large sleeve 10 and small sleeve 9 are equipped with positive stop lug boss near the side of centralizing cylinder β, first centering piston 8 and the second centering piston 8 ' to be all installed in centralizing cylinder β and to be positioned at the two ends of positive stop lug boss, centralizing cylinder β is divided into left centering oil pocket C and right centering oil pocket D by the first centering piston 8 and the second centering piston 8 ',
First oil passage P1 is communicated with left steering oil pocket A, second oil passage P2 is communicated with right steering oil pocket B, 3rd oil passage P3 is communicated with left centering oil pocket C, 4th oil passage P4 is communicated with right centering oil pocket D, and the 5th oil passage T is communicated with the gap between the first centering piston 8 and the positive stop lug boss of the second centering piston 8 '.
Further, in the present embodiment, piston rod 6 and steering piston 5 are formed in one, to reduce the manufacture cost of this oil hydraulic cylinder.The two ends of cylinder body 4 are all provided with end cap 3 to be sealed by its oil pocket, and the two ends of piston rod 6 all convexedly stretch in outside two end cap 3, and end cap 3 and cylinder body 4 removably connect.First centering piston 8, second centering piston 8 ' and the outer all covers of steering piston 5 have some piston rings.In the present embodiment, end cap 3 and cylinder body 4 are removably connected, the first centering piston 8 and piston ring etc. can constantly be changed according to requirements.
Particularly, large sleeve 10 upper limit boss is equal along the length of its axis with small sleeve 9 upper limit boss along the length of its axis.
The outer leg 2 be also provided with for oil hydraulic cylinder being fixed on frame support of cylinder body 4.The two ends of piston rod 6 are equipped with end thread 1.Small sleeve 9 is fixed on piston rod 6 by locking nut 11.Locking nut 11 on piston rod 6 engages with the end thread 1 on piston rod 6.
This oil hydraulic cylinder has the function of accurate control piston displacement, and specific implementation is the control by hydraulic circuit.Comprise various electronic valve and a rear-axle steering control unit in hydraulic circuit, this unit can communicate with automobile control unit, obtains and determine rear wheel steering angle with this.Rear wheel steering angle is converted to hydraulic cylinder piston displacement by rear-axle steering control unit.By concrete PID(ratio (proportion), integration (integration), differential (differentiation)) control, realize the controllable precise to piston displacement.
When applying the oil hydraulic cylinder that example of the present invention provides, the two ends, left and right of oil hydraulic cylinder utilize ball pin joint to be connected to the steering tie rod of the tie rod linkage of vehicle rear wheel steering mechanism respectively, and oil hydraulic cylinder is fixed on frame support by leg 2.
Particularly, with electromagnetic valve oil hydraulic cylinder provided by the invention, to apply when it realizes back positive alignment function (need back positive prerequisite after piston rod 6 moves to left under,), oil-filled to the left centering oil pocket C of centralizing cylinder β by the 3rd oil passage P3, continue oil-filled wherein after fluid is full of left centering oil pocket C, now, too much fluid promotes the first centering piston 8 and moves right, until the positive stop lug boss that the first centering piston 8 is conflicted on large sleeve 10.Right centering oil pocket D and left centering oil pocket C is fuel feeding simultaneously, and the second centering piston 8 ' is non-loaded, first can contact the positive stop lug boss on large sleeve 10 than the first centering piston 8.At this moment, piston rod 6 clamps by the first centering piston 8 and the second centering piston 8 ', and therefore, piston rod 6 can not move left and right relative to cylinder body 4.In addition, because the oil pocket between the first centering piston 8 and the second centering piston 8 ' is communicated with the 5th oil passage T, so fluid herein can normally be discharged, thus this oil hydraulic cylinder is made to realize back the effect of positive centering.
By applying its turning function with electromagnetic valve oil hydraulic cylinder provided by the invention.When turning to level direction to the right, the first oil passage P1 is utilized to turn left oil-filled to oil pocket A, steering piston 5 promotes piston rod 6 and moves right, piston rod 6 thus to promote the second centering piston 8 ' mobile, and the fluid now in right centering oil pocket D is discharged by the 4th oil passage P4.When turning to level direction left, utilize the second liquid passage P2 to turn right oil-filled to oil pocket B, fluid promotes piston rod 6 and moves to left, and piston rod 6 promotes the first centering piston 8 and moves, and the fluid now in left centering oil pocket C is discharged by the 3rd oil passage P3.Because the oil pocket between the first centering piston 8 and the second centering piston 8 ' is communicated with a low pressure fluid by the 5th oil passage T all the time, so can not negative pressure be formed, thus this oil hydraulic cylinder is made to realize turning function.
The oil hydraulic cylinder that the present invention proposes, it is made to have centering and turning function concurrently by arranging centralizing cylinder β and steering cylinder α, can suitable steering power be provided for four-wheel steering automobile rear-axle steering mechanism thus promote to turn to afterwards on the one hand, make the rear-axle steering mechanism of four-wheel steering automobile return positive centering on the other hand, thus improve stationary performance when four-wheel steering automobile is kept straight on.In addition, the oil hydraulic cylinder that the present invention proposes is compared with the structural type of steering cylinder α with the centralizing cylinder β installed respectively, and that it has compact structure, with low cost, institute takes up space is little, install simply and the advantage of reliable operation.
These are only the preferred embodiments of the present invention; not thereby the scope of the claims of the present invention is limited; every equivalent structure transformation utilizing specification of the present invention and accompanying drawing content to do, or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present invention.
Claims (6)
1. turn to and return a positive bifunctional hydraulic cylinder, it is characterized in that, comprising cylinder body, piston rod, large sleeve, small sleeve, the first centering piston and the second centering piston; Wherein,
The oil pocket of described cylinder body is divided into centralizing cylinder and steering cylinder by next door, described cylinder body offers respectively the first oil passage, the second oil passage, the 3rd oil passage, the 4th oil passage and the 5th oil passage that are connected with hydraulic control valve;
Described piston rod is through described cylinder body and convexedly stretch in the two ends of described cylinder body, and the body of rod of described piston rods contain in steering cylinder is provided with steering piston, and the oil pocket of described steering cylinder is divided into left steering oil pocket and right steering oil pocket by this steering piston;
Described large sleeve and small sleeve are all contained in described centralizing cylinder and described large jacket casing is located at outside described small sleeve, described large sleeve is fixed in described cylinder body, described small sleeve is fixed on described piston rod, gap between described large sleeve and small sleeve is formed with oil pocket, described large sleeve and small sleeve are equipped with positive stop lug boss near the side of described centralizing cylinder, described first centering piston and the second centering piston to be all installed in described centralizing cylinder and to be positioned at the two ends of described positive stop lug boss, described centralizing cylinder is divided into left centering oil pocket and right centering oil pocket by described first centering piston and the second centering piston,
Described first oil passage is communicated with described left steering oil pocket, described second oil passage is communicated with described right steering oil pocket, described 3rd oil passage is communicated with described left centering oil pocket, described 4th oil passage is communicated with described right centering oil pocket, and described 5th oil passage is communicated with the gap between described first centering piston and the positive stop lug boss of the second centering piston.
2. turn to as claimed in claim 1 and return positive bifunctional hydraulic cylinder, it is characterized in that, described piston rod and described steering piston are formed in one.
3. turn to as claimed in claim 1 and return positive bifunctional hydraulic cylinder, it is characterized in that, the two ends of described cylinder body are all provided with end cap to be sealed by its oil pocket, and the two ends of described piston rod all convexedly stretch in outside end cap described in two, and described end cap and cylinder body removably connect.
4. turn to as claimed in claim 1 and return positive bifunctional hydraulic cylinder, it is characterized in that, described large sleeve upper limit boss is equal along the length of its axis with described small sleeve upper limit boss along the length of its axis.
5., as turning to and returning positive bifunctional hydraulic cylinder in Claims 1-4 as described in any one, it is characterized in that, described cylinder body is also provided with the leg for being fixed to by oil hydraulic cylinder on frame support outward.
6., as turning to and returning positive bifunctional hydraulic cylinder in Claims 1-4 as described in any one, it is characterized in that, described small sleeve is fixed on described piston rod by locking nut.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510396807.6A CN104930016B (en) | 2015-07-08 | 2015-07-08 | Turn to and return positive bifunctional hydraulic cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510396807.6A CN104930016B (en) | 2015-07-08 | 2015-07-08 | Turn to and return positive bifunctional hydraulic cylinder |
Publications (2)
| Publication Number | Publication Date |
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| CN104930016A true CN104930016A (en) | 2015-09-23 |
| CN104930016B CN104930016B (en) | 2017-03-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510396807.6A Active CN104930016B (en) | 2015-07-08 | 2015-07-08 | Turn to and return positive bifunctional hydraulic cylinder |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108980139A (en) * | 2018-07-24 | 2018-12-11 | 北京理工大学 | Double compact integrated steering centering hydraulic cylinders of rod-type out |
| CN114475773A (en) * | 2022-04-15 | 2022-05-13 | 太重集团榆次液压工业(济南)有限公司 | Automatic steering power-assisted centering device for vehicle |
| WO2022124896A2 (en) | 2020-12-08 | 2022-06-16 | V.S.E. Vehicle Systems Engineering B.V. | Cylinder and operating methods thereof |
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| CN104564897A (en) * | 2014-12-29 | 2015-04-29 | 东风汽车公司 | Integrated type driving and centering hydraulic cylinder |
| CN104590367A (en) * | 2014-12-29 | 2015-05-06 | 东风汽车公司 | Rear axle steering mechanism of puddle jumper |
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2015
- 2015-07-08 CN CN201510396807.6A patent/CN104930016B/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US3735832A (en) * | 1970-03-03 | 1973-05-29 | Honda Motor Co Ltd | Power steering apparatus for a vehicle |
| CN201615099U (en) * | 2009-12-17 | 2010-10-27 | 长沙中联重工科技发展股份有限公司 | Mobile crane, steering middle positioning locking device and middle cylinder thereof |
| CN201784677U (en) * | 2010-09-03 | 2011-04-06 | 长沙中联重工科技发展股份有限公司 | Steering boosting middle cylinder, axle hydraulic steering system and runabout crane |
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| CN104564897A (en) * | 2014-12-29 | 2015-04-29 | 东风汽车公司 | Integrated type driving and centering hydraulic cylinder |
| CN104590367A (en) * | 2014-12-29 | 2015-05-06 | 东风汽车公司 | Rear axle steering mechanism of puddle jumper |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108980139A (en) * | 2018-07-24 | 2018-12-11 | 北京理工大学 | Double compact integrated steering centering hydraulic cylinders of rod-type out |
| WO2022124896A2 (en) | 2020-12-08 | 2022-06-16 | V.S.E. Vehicle Systems Engineering B.V. | Cylinder and operating methods thereof |
| CN114475773A (en) * | 2022-04-15 | 2022-05-13 | 太重集团榆次液压工业(济南)有限公司 | Automatic steering power-assisted centering device for vehicle |
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| Publication number | Publication date |
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| CN104930016B (en) | 2017-03-08 |
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