CN104564897A - Integrated type driving and centering hydraulic cylinder - Google Patents
Integrated type driving and centering hydraulic cylinder Download PDFInfo
- Publication number
- CN104564897A CN104564897A CN201410836864.7A CN201410836864A CN104564897A CN 104564897 A CN104564897 A CN 104564897A CN 201410836864 A CN201410836864 A CN 201410836864A CN 104564897 A CN104564897 A CN 104564897A
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- China
- Prior art keywords
- cylinder
- centering
- cylinder barrel
- oil pocket
- 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
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- 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
- F15B15/1404—Characterised by the construction of the motor unit of the straight-cylinder type in clusters, e.g. multiple cylinders in one block
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D5/00—Power-assisted or power-driven steering
- B62D5/06—Power-assisted or power-driven steering fluid, i.e. using a pressurised fluid for most or all the force required for steering a vehicle
- B62D5/10—Power-assisted or power-driven steering fluid, i.e. using a pressurised fluid for most or all the force required for steering a vehicle characterised by type of power unit
- B62D5/12—Piston and cylinder
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- 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
- F15B15/28—Means for indicating the position, e.g. end of stroke
- F15B15/2815—Position sensing, i.e. means for continuous measurement of position, e.g. LVDT
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- 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
- F15B15/28—Means for indicating the position, e.g. end of stroke
- F15B15/2892—Means for indicating the position, e.g. end of stroke characterised by the attachment means
Abstract
The invention relates to an integrated type driving and centering hydraulic cylinder, and belongs to the technical field of automobile steering systems. The integrated type driving and centering hydraulic cylinder comprises a hydraulic cylinder shell, wherein a tie rod supporting cylinder barrel, a driving cylinder barrel and a centering cylinder barrel are arranged in the hydraulic cylinder shell; a tie rod which penetrates in the tie rod supporting cylinder barrel is arranged in the tie rod supporting cylinder barrel; a portion, which extends out of the tie rod supporting cylinder barrel, of one end of the tie rod is fixedly connected with a connecting block; a driving cylinder connecting rod is arranged in the driving cylinder barrel; a portion, which extends out of the driving cylinder barrel, of one end of the driving cylinder connecting rod is fixedly connected with the connecting block; a centering cylinder connecting rod is arranged in the centering cylinder barrel; and a portion, which extends out of the centering cylinder barrel, of one end of the centering cylinder connecting rod is fixedly connected with the connecting block. The driving cylinder barrel with an active steering function, the centering cylinder barrel with a centering and returning function and the tie rod supporting cylinder barrel are integrated, a steering trapezoid is omitted, and by the structure, a mechanical and hydraulic system of a steering axle can be compact in structure and is convenient to arrange.
Description
Technical field
The invention belongs to automobile steering system technical field, be specifically related to a kind of integrated form and drive centering oil hydraulic cylinder.
Background technique
In existing vehicle multi-shaft steering system, turn to object for what reach steering axle, on the basis increasing tie rod linkage, major part adopts the single-acting formula of two ends band bulb to drive oil hydraulic cylinder and one to rely on pneumatic or hydraulically powered meta locking mechanism.System is caused to take larger space and weight is large, particularly more obvious for this layout of light-duty independent suspension offroad vehicle shortcoming.And existing oil hydraulic cylinder is the simple function with centering or driving, to realize the dual functions driven neutralization, then need to arrange multiple function oil hydraulic cylinder and must and existing steering trapezium with the use of.
Summary of the invention
Object of the present invention is exactly the defect for prior art, provides one to have compact structure, takes up room little, and the integrated form of flexible arrangement drives centering oil hydraulic cylinder.
The technical solution used in the present invention is: comprise oil hydraulic cylinder housing, is provided with drag link and supports cylinder barrel, drive cylinder barrel and centering cylinder barrel in described oil hydraulic cylinder housing; Described drag link supports the drag link being provided with in cylinder barrel and supporting cylinder barrel through drag link, and the part that drag link support cylinder barrel is stretched out in described drag link one end is fixedly connected with contiguous block; Be provided with drive cylinder connecting rod in described driving cylinder barrel, described drive cylinder connecting rod one end is stretched out and is driven the part of cylinder barrel to be fixedly connected with contiguous block; Be provided with centralizing cylinder connecting rod in described centering cylinder barrel, the part that centering cylinder barrel is stretched out in described centralizing cylinder connecting rod one end is fixedly connected with contiguous block.
In technique scheme, by contiguous block, drag link, drive cylinder connecting rod and centralizing cylinder connecting rod are linked together, compact structure, reliable transmission.
Preferred structure further, described driving cylinder barrel and centering cylinder barrel support cylinder barrel relative to drag link and be arranged in parallel.
Preferred structure further, the first oil pocket about being provided with drive cylinder piston in described driving cylinder barrel and being separately positioned on drive cylinder piston and the second oil pocket; Described oil hydraulic cylinder housing has drive cylinder left power-assisted hydraulic fluid port and the right power-assisted hydraulic fluid port of drive cylinder, described first oil pocket communicates with the left power-assisted hydraulic fluid port of drive cylinder, described second oil pocket communicates with the right power-assisted hydraulic fluid port of drive cylinder, and described drive cylinder piston is fixedly connected with drive cylinder connecting rod.
Preferred structure further, be provided with the magnet ring fixed base be threaded with drive cylinder interlinking lever end in described driving cylinder barrel and pass on left with driving cylinder barrel the Linear displacement transducer fixed base be threaded, be provided with in described magnet ring fixed base left end hole by the fastening magnet ring of Cross Recess Head Screw, in order to the physical location of real-time perception drive cylinder piston, Linear displacement transducer is provided with in described Linear displacement transducer fixed base, prevent the axial displacement of Linear displacement transducer by marking closely screw and rotate in a circumferential direction, described Linear displacement transducer left end is provided with the outside that Linear displacement transducer wire harness is connected to drive cylinder cylinder barrel.Thus realize particular location control system being sent in real time to drive cylinder piston (i.e. drive cylinder connecting rod), reach the object of the accurately real-time steering angle of monitoring.
Preferred structure further, rear end floating piston and rod end floating piston is provided with in described centering cylinder barrel, described rod end floating piston to be set on centralizing cylinder connecting rod and spacing by the connecting-rod bolts being fixed on centralizing cylinder interlinking lever end, the 3rd oil pocket is formed with centering inner wall of cylinder on the left of described rear end floating piston, form the 4th oil pocket with centering inner wall of cylinder on the right side of described rod end floating piston, between described rear end floating piston and rod end floating piston, form air cavity.
Preferred structure further, described oil hydraulic cylinder housing has centralizing cylinder hydraulic fluid port, described centering cylinder barrel cylinder wall is provided with internal oil channel, described centralizing cylinder hydraulic fluid port communicates with internal oil channel entrance, described internal oil channel comprises the first outlet and second be communicated with in centering cylinder barrel and exports, described first outlet communicates with the 3rd oil pocket, and described second outlet communicates with the 4th oil pocket; Described air cavity communicates with the pore leading to air; Described air cavity does not all communicate with the 3rd oil pocket, the 4th oil pocket.
In technique scheme, the first outlet of internal oil channel and the setting of the second outlet, make the 3rd oil pocket and the 4th oil pocket can while oil-feed, and then meet the alignment function of centering cylinder barrel.
Preferred structure further, left position jump ring and right position jump ring is provided with between described rear end floating piston and rod end floating piston, in described left position jump ring and the spacing groove being arranged on centering inner wall of cylinder of right position jump ring, described in the Distance geometry between the left end of described left position jump ring and the right-hand member of right position jump ring, connecting-rod bolts thickness is equal.
In technique scheme, left position jump ring and right position jump ring are respectively as the limit structure of rear end floating piston and rod end floating piston.
Preferred structure further, distance between the left end of described magnet ring fixed base and the end face of Linear displacement transducer forms the effective travel that drive cylinder connecting rod is moved to the left in the first oil pocket, distance between the right-hand member of described drive cylinder piston and the left end of the first guide holder forms the effective travel of drive cylinder connecting rod in the second oil pocket, and the effective travel of described drive cylinder connecting rod in the first oil pocket and the second oil pocket is equal.
Preferred structure further, ultimate range between the left end of described rear end floating piston and the right-hand member being arranged on the position limit socket in centering cylinder barrel forms the effective travel that centralizing cylinder connecting rod is moved to the left in the 3rd oil pocket, ultimate range between the right-hand member of described rod end floating piston and the left end of the second guide holder forms the effective travel that centralizing cylinder connecting rod moves right in the 4th oil pocket, and the effective travel of described centralizing cylinder connecting rod in the 3rd oil pocket and the 4th oil pocket is equal.
Preferred structure further, the effective travel of described centralizing cylinder connecting rod in the 3rd oil pocket or the 4th oil pocket is less than the effective travel of drive cylinder connecting rod in the first oil pocket or the second oil pocket.
In technique scheme, the effective travel of described centralizing cylinder connecting rod in the 3rd oil pocket or the 4th oil pocket is less than the effective travel of drive cylinder connecting rod in the first oil pocket or the second oil pocket.Thus can ensure that Linear displacement transducer is not damaged by pressure.
The present invention has the driving cylinder barrel of active steering function, the centering cylinder barrel with centering return function and drag link and supports cylinder barrel and integrate, eliminate a steering trapezium, by this structure can make the machinery of steering axle and hydraulic system structure compact, convenient layout, can realize driving and alignment function simultaneously.This cylinder barrel integration mode have employed forging type in the present embodiment, for the mode adopting standard purlin mill cylinder barrel to carry out welding equally in scope.
Accompanying drawing explanation
Fig. 1 is rear-axle steering mechanism structure schematic diagram of the present invention;
Fig. 2 is the structural representation that integrated form of the present invention drives centering oil hydraulic cylinder;
Fig. 3 is right steering side pull-rod structural representation of the present invention;
Fig. 4 is oil hydraulic cylinder shell construction schematic diagram of the present invention;
Fig. 5 is that drag link of the present invention supports cylinder barrel internal structure schematic diagram;
Internal structure schematic diagram when Fig. 6 is integrated form of the present invention driving centering oil hydraulic cylinder meta;
Fig. 7 is A place partial structurtes enlarged view in Fig. 6;
Fig. 8 is B place partial structurtes enlarged view in Fig. 6;
Fig. 9 is that integrated form of the present invention drives centering oil hydraulic cylinder to drive schematic diagram when turning to the right;
Figure 10 is integrated form of the present invention schematic diagram when driving centering oil hydraulic cylinder centering return locked.
In figure: 1-left steering is taken turns, 2-left steering saves, 3-left steering side pull-rod, 4-car crossbeam, 5-integrated form drives centering oil hydraulic cylinder, 6-bolt, 7-right steering side pull-rod, 8-right steering saves, 9-right steering is taken turns, 10-drag link, 11-oil hydraulic cylinder housing, the left power-assisted hydraulic fluid port of 12-drive cylinder, 13-installs tapped hole, the right power-assisted hydraulic fluid port of 14-drive cylinder, 15-drive cylinder connecting rod, 16-contiguous block, 17-locking nut, 18-centralizing cylinder connecting rod, 19-centralizing cylinder hydraulic fluid port, 20-draw-in bar bulb assembly, the prenex adjusting nut of 21-, 22-outside link bulb assembly, 23-rear end floating piston, 24-pore, 25-rod end floating piston, 26-drive cylinder piston, 27-drives cylinder barrel, 28-drag link supports cylinder barrel, 29-centering cylinder barrel, 30-jump ring, 31-anti-dust seal, 32-stop ring, 33-DU bearing, 34-lubricating grease, 35-right position jump ring, 36-left position jump ring, 37-internal oil channel, 38-connecting-rod bolts, 39-first oil pocket, 40-second oil pocket, 41-the 3rd oil pocket, 42-the 4th oil pocket, 43-air cavity, 44-position limit socket, 45-Linear displacement transducer, 46-magnet ring fixed base, 47-marks closely screw, 48-Linear displacement transducer fixed base, 49-magnet ring, 50-Cross Recess Head Screw, 51-first guide holder, 52-second guide holder.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail, is convenient to be well understood to the present invention, but they do not form restriction to the present invention.
As Figure 1-Figure 5, the present invention includes oil hydraulic cylinder housing 11, be provided with drag link in described oil hydraulic cylinder housing 11 and support cylinder barrel 28, drive cylinder barrel 27 and centering cylinder barrel 29; Described drag link supports the drag link 10 being provided with in cylinder barrel 28 and supporting cylinder barrel 28 through drag link, and the part that drag link support cylinder barrel 28 is stretched out in described drag link 10 one end is fixedly connected with contiguous block 16; Be provided with drive cylinder connecting rod 15 in described driving cylinder barrel 27, described drive cylinder connecting rod 15 one end is stretched out and is driven the part of cylinder barrel 27 to be fixedly connected with contiguous block 16 by locking nut 17; Be provided with centralizing cylinder connecting rod 18 in described centering cylinder barrel 29, the part that centering cylinder barrel 29 is stretched out in described centralizing cylinder connecting rod 18 one end is fixedly connected with contiguous block 16 by locking nut 17.The part that described drag link 10 left end stretches out drag link support cylinder barrel 28 is hinged with left steering side pull-rod 3, and described right steering side pull-rod 7 is hinged with contiguous block 16.Described driving cylinder barrel 27 and centering cylinder barrel 29 support cylinder barrel 28 relative to drag link and be arranged in parallel.Described drag link 10 and contiguous block 16 realize fastening by being threaded of draw-in bar bulb assembly 20, and described centralizing cylinder connecting rod 18, drag link 10 and drive cylinder connecting rod 15 realize synchronous linear kinematic relation by contiguous block 16; The axis that described drag link 10 can support cylinder barrel 28 along drag link carries out linear reciprocating motion, saves 2, left steering side pull-rod 3, drag link 10, right steering side pull-rod 7, right steering save 8 and jointly form rear-axle steering tie rod linkage by left steering.Described drag link support cylinder barrel 28 two ends are provided with DU bearing 33, stop ring 32, jump ring 30, anti-dust seal 31 for supporting drag link 10, and drag link supports between cylinder barrel 28 and drag link 10 and is provided with lubricating grease 34.
As shown in Figure 6, Figure 7, drive cylinder piston 26 and the first oil pocket 39 and the second oil pocket 40 being separately positioned on drive cylinder piston about 26 is provided with in described driving cylinder barrel 27; Described oil hydraulic cylinder housing 11 has drive cylinder left power-assisted hydraulic fluid port 12 and the right power-assisted hydraulic fluid port 14 of drive cylinder, described first oil pocket 39 communicates with the left power-assisted hydraulic fluid port 12 of drive cylinder, described second oil pocket 40 communicates with the right power-assisted hydraulic fluid port 14 of drive cylinder, and described drive cylinder piston 26 is fixedly connected with drive cylinder connecting rod 15.Be provided with the magnet ring fixed base 46 that is connected with drive cylinder connecting rod 15 end thread in described driving cylinder barrel 27 and pass on left with driving cylinder barrel 27 the Linear displacement transducer fixed base 48 be threaded, be provided with in described magnet ring fixed base 46 left end hole by the fastening magnet ring 49 of Cross Recess Head Screw 50, in order to the physical location of real-time perception drive cylinder piston 26, Linear displacement transducer 45 is provided with in described Linear displacement transducer fixed base 48, prevent the axial displacement of Linear displacement transducer 45 by marking closely screw 47 and rotate in a circumferential direction, described Linear displacement transducer 45 left end is provided with the outside that Linear displacement transducer wire harness 45.1 is connected to drive cylinder cylinder barrel 27.
As Fig. 6, shown in Fig. 8, rear end floating piston 23 and rod end floating piston 25 is provided with in described centering cylinder barrel 29, described rod end floating piston 25 to be set on centralizing cylinder connecting rod 18 and spacing by the connecting-rod bolts 38 being fixed on centralizing cylinder connecting rod 18 end, described rod end floating piston 25 can slide on centralizing cylinder connecting rod 18, the 3rd oil pocket 41 is formed with centering cylinder barrel 29 inwall on the left of described rear end floating piston 23, the 4th oil pocket 42 is formed with centering cylinder barrel 29 inwall on the right side of described rod end floating piston 25, air cavity 43 is formed between described rear end floating piston 23 and rod end floating piston 25.
As shown in Figure 6, described oil hydraulic cylinder housing 11 has centralizing cylinder hydraulic fluid port 19, described centering cylinder barrel 29 cylinder wall is provided with internal oil channel 37, described centralizing cylinder hydraulic fluid port 19 communicates with internal oil channel 37 entrance, described internal oil channel 37 comprises the first outlet 37.1 and the second outlet 37.2 be communicated with in centering cylinder barrel 29, described first outlet 37.1 communicates with the 3rd oil pocket 41, and described second outlet 37.2 communicates with the 4th oil pocket 42; Described air cavity 43 communicates with the pore 24 leading to air; Described air cavity 43 does not all communicate with the 3rd oil pocket 41, the 4th oil pocket 42.
As shown in Fig. 6, Fig. 8, left position jump ring 36 and right position jump ring 35 is provided with between described rear end floating piston 23 and rod end floating piston 25, in described left position jump ring 36 and the spacing groove 29.1 being arranged on centering cylinder barrel 29 inwall of right position jump ring 35, described in the Distance geometry between the left end of described left position jump ring 36 and the right-hand member of right position jump ring 35, connecting-rod bolts 38 thickness is equal.
As shown in Figure 6, distance between the left end of described magnet ring fixed base 46 and the end face 45.2 of Linear displacement transducer 45 when centering oil cylinder meta (integrated form drive) forms the effective travel that drive cylinder connecting rod 15 is moved to the left in the first oil pocket 39, distance between the right-hand member of described drive cylinder piston 26 and the left end of the first guide holder 51 when centering oil cylinder meta (integrated form drive) forms the effective travel of drive cylinder connecting rod 15 in the second oil pocket 40, and the effective travel of described drive cylinder connecting rod 15 in the first oil pocket 39 and the second oil pocket 40 is equal; Ultimate range between the left end of described rear end floating piston 23 and the right-hand member being arranged on the position limit socket 44 in centering cylinder barrel 29 forms the effective travel that centralizing cylinder connecting rod 18 is moved to the left in the 3rd oil pocket 41, ultimate range between the right-hand member of described rod end floating piston 25 and the left end of the second guide holder 52 forms the effective travel that centralizing cylinder connecting rod 18 moves right in the 4th oil pocket 42, the effective travel of described centralizing cylinder connecting rod 18 in the 3rd oil pocket 41 and the 4th oil pocket 42 is equal, by being arranged on the auxiliary realization of position limit socket 44 in centering cylinder barrel 29.The effective travel of described centralizing cylinder connecting rod 18 in the 3rd oil pocket 41 or the 4th oil pocket 42 is less than the effective travel of drive cylinder connecting rod 15 in the first oil pocket 39 or the second oil pocket 40, thus can ensure that Linear displacement transducer is not damaged by pressure.
As shown in Figure 1 and Figure 2, the present invention is applied in automobile axle steering equipment, and described integrated form drives centering oil hydraulic cylinder 5 to be fixed on car crossbeam 4 by bolt 6 and installation tapped hole 13; Described integrated form drives centering oil hydraulic cylinder 5, and left end is threaded connection left steering side pull-rod 3, and right-hand member is threaded connection right steering side pull-rod 7; Described left steering wheel 1 saves 2 with left steering and is fixedly connected with; Described right steering wheel 9 saves 8 with right steering and is fixedly connected with; Described left steering joint 2 is connected by bulb with left steering side pull-rod 3; Described right steering joint 8 is connected by bulb with right steering side pull-rod 7.
As shown in Figure 3, described right steering side pull-rod 7, comprises left end threaded draw-in bar bulb assembly 20, prenex adjusting nut 21 and outside link bulb assembly 22; Described draw-in bar bulb assembly 20 is connected with outside link bulb assembly 22 by screw thread; Described prenex adjusting nut 21 is for adjusting the toe-angle of rear-axle steering wheel.
The present invention is applied to working procedure in automobile axle steering equipment:
As shown in Figure 6, automobile craspedodrome state or back axle not steering state.The 3rd oil pocket 41 be responsible on the centering cylinder barrel 29 of centering return function is communicated with oil return tank by centralizing cylinder hydraulic fluid port 19, the 4th oil pocket 42 on centering cylinder barrel 29 also communicates with oil return tank through internal oil channel 37 to centralizing cylinder hydraulic fluid port 19, the thrust (or pulling force) now acted on centralizing cylinder connecting rod 18 by the 3rd oil pocket 41 and the 4th oil pocket 42 is approximately 0, and centralizing cylinder connecting rod 18 not to cut any ice power to drag link 10; Be responsible for turning to the first oil pocket 39 of driving cylinder barrel 27 inside of driving effect to communicate with the left power-assisted hydraulic fluid port 12 of drive cylinder, second oil pocket 40 and the right power-assisted hydraulic fluid port 14 of drive cylinder communicate, but now because automobile is at craspedodrome state or back axle not steering state, drive cylinder left power-assisted hydraulic fluid port 12 and the right power-assisted hydraulic fluid port 14 of drive cylinder are all controlled in cut-off state by solenoid valve group, do not communicate with any oil circuit.If now automobile left steering wheel 1 (or right steering wheel 9) is used for drag link 10 by external impacts masterpiece, possesses the trend of ordering about drag link 10 and moving, but due to the first oil pocket 39 and the second oil pocket 40 all airtight, due to the incompressible characteristic of fluid, make drag link keep motionless, automobile is still at craspedodrome state (or back axle not steering state).
As shown in Figure 9, automobile steering state to the right.The 3rd oil pocket 41 now on centering cylinder barrel 29 is communicated with oil return tank by centralizing cylinder hydraulic fluid port 19, the 4th oil pocket 42 on centering cylinder barrel 29 also communicates with oil return tank through internal oil channel 37 to centralizing cylinder hydraulic fluid port 19, the thrust (or pulling force) now acted on centralizing cylinder connecting rod 18 by the 3rd oil pocket 41 and the 4th oil pocket 42 is approximately 0, and centralizing cylinder connecting rod 18 not to cut any ice power to drag link 10; High pressure oil to oil hydraulic pump or high pressure accumulator enters the first oil pocket 39 through the left power-assisted hydraulic fluid port 12 of drive cylinder, and promote drive cylinder piston 26 to the right in the direction of the arrow thus drive drive cylinder connecting rod 15 to move right, drive cylinder connecting rod 15 drives drag link 10 to move right the object reaching and promote wheel steering together with time positive cylinder rod 18 by contiguous block 16 simultaneously.Low pressure oil simultaneously in the second oil pocket 40 flow to oil return tank by the right power-assisted hydraulic fluid port 14 of drive cylinder; 4th oil pocket 42 diminishes because of volume, and the low pressure oil in its chamber flow to centralizing cylinder hydraulic fluid port 19 by internal oil channel 37 and flow to oil return tank again; Air cavity 43 becomes large because of volume, sucks air from pore 24.
It is just contrary that automobile returns timing hydraulic circuit left, namely the high pressure oil from oil hydraulic pump or high pressure accumulator enters the second oil pocket 40 through the right power-assisted hydraulic fluid port 14 of drive cylinder, and promote drive cylinder piston 26 left in the other direction along arrow thus drive drive cylinder connecting rod 15 to left movement, drive cylinder connecting rod 15 drives drag link 10 to reach promotion wheel to left movement together with time positive cylinder rod 18 by contiguous block 16 simultaneously and returns positive object, low pressure oil simultaneously in the first oil pocket 39 flow to oil return tank by the left power-assisted hydraulic fluid port 12 of drive cylinder, 4th oil pocket 42 internal cause volume becomes large from the oil suction of oil return tank, air cavity 43 diminishes because of volume, air is discharged from pore 24.
As shown in Figure 10, state when the centering return that breaks down is locked.Now solenoid valve group makes drive cylinder left power-assisted hydraulic fluid port 12 and the right power-assisted hydraulic fluid port 14 of drive cylinder all communicate with oil return tank, namely the first oil pocket 39 and the second oil pocket 40 all communicate with oil return tank, therefore drive cylinder connecting rod 15 is not by the added force of hydraulic oil, only follows contiguous block 16 and moves together; High pressure oil meanwhile from high pressure accumulator communicates with centralizing cylinder hydraulic fluid port 19, high pressure oil enters the 3rd oil pocket 41 and the 4th oil pocket 42 of centering cylinder barrel 29 after centralizing cylinder hydraulic fluid port 19 simultaneously, the high pressure oil entering the 3rd oil pocket 41 promotes rear end floating piston 23 left, stops after being pressed onto left position jump ring 36; After the high pressure oil entered in the 4th oil pocket 42 promotes rod end floating piston 25 left, drive centralizing cylinder connecting rod 18 to left movement, until stop after being pressed onto right position jump ring 35, the top rear end floating piston 23 of connecting rod nut 38 left end be simultaneously connected with centralizing cylinder connecting rod 18; Air cavity 43 diminishes due to volume, discharges air from pore 24; First oil pocket 39 diminishes due to volume, discharges low pressure oil to oil sump tank from the left power-assisted hydraulic fluid port 12 of drive cylinder; Second oil pocket 40 becomes large due to volume, and the right power-assisted hydraulic fluid port 14 of drive cylinder sucks lower than oil from oil return tank; Because high pressure accumulator inside still exists higher pressure, centralizing cylinder connecting rod 18 is fixed on back axle not steering state by two floating pistons, thus reaches locked function.
The content that this specification is not described in detail belongs to the known prior art of professional and technical personnel in the field.
Claims (10)
1. an integrated form drives centering oil hydraulic cylinder, comprise oil hydraulic cylinder housing (11), it is characterized in that: be provided with drag link in described oil hydraulic cylinder housing (11) and support cylinder barrel (28), drive cylinder barrel (27) and centering cylinder barrel (29); Described drag link supports the drag link (10) being provided with in cylinder barrel (28) and supporting cylinder barrel (28) through drag link, and the part that drag link support cylinder barrel (28) is stretched out in described drag link (10) one end is fixedly connected with contiguous block (16); Be provided with drive cylinder connecting rod (15) in described driving cylinder barrel (27), described drive cylinder connecting rod (15) one end is stretched out and is driven the part of cylinder barrel (27) to be fixedly connected with contiguous block (16); Be provided with centralizing cylinder connecting rod (18) in described centering cylinder barrel (29), the part that centering cylinder barrel (29) is stretched out in described centralizing cylinder connecting rod (18) one end is fixedly connected with contiguous block (16).
2. integrated form according to claim 1 drives centering oil hydraulic cylinder, it is characterized in that: described driving cylinder barrel (27) and centering cylinder barrel (29) support cylinder barrel (28) relative to drag link and be arranged in parallel.
3. integrated form according to claim 1 and 2 drives centering oil hydraulic cylinder, it is characterized in that: the first oil pocket (39) about being provided with drive cylinder piston (26) in described driving cylinder barrel (27) and being separately positioned on drive cylinder piston (26) and the second oil pocket (40); Described oil hydraulic cylinder housing (11) has drive cylinder left power-assisted hydraulic fluid port (12) and the right power-assisted hydraulic fluid port (14) of drive cylinder, described first oil pocket (39) communicates with the left power-assisted hydraulic fluid port (12) of drive cylinder, described second oil pocket (40) communicates with the right power-assisted hydraulic fluid port (14) of drive cylinder, and described drive cylinder piston (26) is fixedly connected with drive cylinder connecting rod (15).
4. integrated form according to claim 3 drives centering oil hydraulic cylinder, it is characterized in that: be provided with the magnet ring fixed base (46) be connected with drive cylinder connecting rod (15) end thread in described driving cylinder barrel (27) and pass on left with driving cylinder barrel (27) the Linear displacement transducer fixed base (48) be threaded, be provided with in described magnet ring fixed base (46) left end hole by the fastening magnet ring (49) of Cross Recess Head Screw (50), Linear displacement transducer (45) is provided with in described Linear displacement transducer fixed base (48), described Linear displacement transducer (45) left end is provided with the outside that Linear displacement transducer wire harness (45.1) is connected to drive cylinder cylinder barrel (27).
5. integrated form according to claim 4 drives centering oil hydraulic cylinder, it is characterized in that: in described centering cylinder barrel (29), be provided with rear end floating piston (23) and rod end floating piston (25), it is upper and spacing by the connecting-rod bolts (38) being fixed on centralizing cylinder connecting rod (18) end that described rod end floating piston (25) is set in centralizing cylinder connecting rod (18), described rear end floating piston (23) left side forms the 3rd oil pocket (41) with centering cylinder barrel (29) inwall, described rod end floating piston (25) right side forms the 4th oil pocket (42) with centering cylinder barrel (29) inwall, air cavity (43) is formed between described rear end floating piston (23) and rod end floating piston (25).
6. integrated form according to claim 5 drives centering oil hydraulic cylinder, it is characterized in that: described oil hydraulic cylinder housing (11) has centralizing cylinder hydraulic fluid port (19), described centering cylinder barrel (29) cylinder wall is provided with internal oil channel (37), described centralizing cylinder hydraulic fluid port (19) communicates with internal oil channel (37) entrance, described internal oil channel (37) comprises the first outlet (37.1) and second be communicated with in centering cylinder barrel (29) and exports (37.2), described first outlet (37.1) communicates with the 3rd oil pocket (41), described second outlet (37.2) communicates with the 4th oil pocket (42), described air cavity (43) communicates with the pore (24) leading to air, described air cavity (43) does not all communicate with the 3rd oil pocket (41), the 4th oil pocket (42).
7. integrated form according to claim 6 drives centering oil hydraulic cylinder, it is characterized in that: between described rear end floating piston (23) and rod end floating piston (25), be provided with left position jump ring (36) and right position jump ring (35), described left position jump ring (36) and right position jump ring (35) is spacing is arranged in the groove (29.1) of centering cylinder barrel (29) inwall, described in the Distance geometry between the left end of described left position jump ring (36) and the right-hand member of right position jump ring (35), connecting-rod bolts (38) thickness is equal.
8. according to claim 5 tell integrated form and drive centering oil hydraulic cylinder, it is characterized in that: the distance between the left end of described magnet ring fixed base (46) and the end face (45.2) of Linear displacement transducer (45) forms the effective travel that drive cylinder connecting rod (15) is moved to the left in the first oil pocket (39), distance between the right-hand member of described drive cylinder piston (26) and the left end of the first guide holder (51) forms the effective travel of drive cylinder connecting rod (15) in the second oil pocket (40), the effective travel of described drive cylinder connecting rod (15) in the first oil pocket (39) and the second oil pocket (40) is equal.
9. integrated form according to claim 8 drives centering oil hydraulic cylinder, it is characterized in that: the ultimate range between the left end of described rear end floating piston (23) and the right-hand member being arranged on the position limit socket (44) in centering cylinder barrel (29) forms the effective travel that centralizing cylinder connecting rod (18) is moved to the left in the 3rd oil pocket (41), ultimate range between the right-hand member of described rod end floating piston (25) and the left end of the second guide holder (52) forms the effective travel that centralizing cylinder connecting rod (18) moves right in the 4th oil pocket (42), the effective travel of described centralizing cylinder connecting rod (18) in the 3rd oil pocket (41) and the 4th oil pocket (42) is equal.
10. integrated form according to claim 9 drives centering oil hydraulic cylinder, it is characterized in that: the effective travel of described centralizing cylinder connecting rod (18) in the 3rd oil pocket (41) or the 4th oil pocket (42) is less than the effective travel of drive cylinder connecting rod (15) in the first oil pocket (39) or the second oil pocket (40).
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| CN104930016A (en) * | 2015-07-08 | 2015-09-23 | 武汉理工大学 | Hydraulic cylinder achieving steering function and return-to-center function |
| 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 |
| CN106968993A (en) * | 2017-02-27 | 2017-07-21 | 韩佩永 | Assisted hydraulic mechanical driven system |
| CN108639150A (en) * | 2018-06-29 | 2018-10-12 | 重庆市华燕机械有限公司 | A kind of horizontal drawing lever for car steering |
| CN112682387A (en) * | 2021-01-14 | 2021-04-20 | 山东浩睿智能科技有限公司 | Automatic turn to hydro-cylinder in return |
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| CN112682387A (en) * | 2021-01-14 | 2021-04-20 | 山东浩睿智能科技有限公司 | Automatic turn to hydro-cylinder in return |
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| Publication number | Publication date |
|---|---|
| CN104564897B (en) | 2016-09-14 |
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