CN102649448A - Hydraulic steering wheel planetary steering crawler tractor - Google Patents
Hydraulic steering wheel planetary steering crawler tractor Download PDFInfo
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- CN102649448A CN102649448A CN2012101111021A CN201210111102A CN102649448A CN 102649448 A CN102649448 A CN 102649448A CN 2012101111021 A CN2012101111021 A CN 2012101111021A CN 201210111102 A CN201210111102 A CN 201210111102A CN 102649448 A CN102649448 A CN 102649448A
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Abstract
The invention discloses a hydraulic steering wheel planetary steering crawler tractor, which is characterized by being provided with a hydraulic steering wheel steering brake control device (1), a planetary steering mechanism steering linkage device (2), a right connecting rod assembly (3) and a left connecting rod assembly (4), wherein the planetary steering mechanism steering linkage device (2) comprises a left planetary steering mechanism (2A), a left planetary steering mechanism brake (2B), a left half axle brake (2C), a right planetary steering mechanism (2D), a right planetary steering mechanism brake (2E), a right half axle brake (2F), a central transmission bevel gear wheel (2G), a planetary steering mechanism large gear ring (2H) and a rear axle housing (2K), and the hydraulic steering wheel steering brake control device (1) is connected with the right half axle brake (2F) through the right connecting rod assembly (3) and is connected with the left half axle brake (2C) through the left connecting rod assembly (4). The tractor disclosed by the invention has the advantages of easiness in operation, long service life and high work efficiency.
Description
Technical field
The present invention relates to realize that with steering planetary the crawler travel that turns to is mechanical, all-hydraulic specifically bearing circle planet turns to crawler-tread tractor.
Background technology
Crawler travel machineries such as the existing crawler-tread tractor of realizing turning to steering planetary, bulldozer; All be provided with left and right steering planetary brake service bar and left and right half brake pedal in chaufeur the place ahead, when turning to, chaufeur should be removed a left side or right lateral star steering hardware brake service bar by hand; Pin is stepped on a left side or right axle shaft brake pedal again; When needing braking or deceleration in the driving, chaufeur must be stepped on the left and right half brake pedal simultaneously, and running on wheels such as existing wheel-tire tractor machinery; Only need steering wheel rotation when turning to, only need step on next brake pedal when service brake or deceleration.Two kinds of steering operation modes contrast, and there is following shortcoming in existing crawler travel mechanical steering operating mode: 1. owing to the difference on the operating habit, chaufeur need pass through special training; When 2. turning to, chaufeur will be used both hands and feet, and certainly will disperse the energy of chaufeur, causes fatigue easily, and work efficiency and safety also can reduce; 3. require chaufeur that higher driving quality is arranged, when turning to, require chaufeur formerly to separate under the steering planetary drg cut-out power situation and implement the braking of semiaxis drg again; Promptly move a left side or right lateral star steering hardware brake service bar; When treating that the steering planetary drg thoroughly separates, can step on a left side or right axle shaft brake pedal, when perhaps needing straight-line travelling; Require chaufeur at first to unclamp a left side or right axle shaft brake pedal; After treating complete brake off, can engage a left side or right lateral star steering hardware brake service bar and engage power, yet; In fact be difficult to accomplish that trick cooperates precisely, puts in place, therefore do not cut off power enforcement braking and cause the semiaxis brake wear to increase the weight of; 4. during service brake, chaufeur must be stepped on the left and right half brake pedal simultaneously, the operation effort.
The patent No. is 200510009784.5; Patent name discloses a kind of hydraulic gear that is applicable to double-current transmission in the Chinese patent of " a kind of maneuver control device of tracklaying vehicle "; Comprise the equalizing gear change speed gear box that a panel block and can oppositely export with the both sides of hydraulic continuously variable transmission adapted; Handle control box and control knuckle section, control speed change, switching-over part through handling control box by the stepless change bar by bearing circle; Handle the control box knuckle section comprise the pair of engaged gears that is positioned at the bearing circle adapter shaft under, main shaft, with main shaft bonded assembly half universal-joint, universal joint cross-head on control panel, bouquet, outer sliding sleeve rail and drive the slide-bar that turns to that flexible axle moves; Speed change, switching-over part are to drive flexible axle by the stepless change bar, drive rotating shaft through rocking arm; Fixing fixedly dial, control panel, sliding ball, inner sliding sleeve rail in the rotating shaft.This prior art is to be used for turning to of double power flow continuously tracked vehicle, adopted the very complicated special-purpose wheel steering mechanism of a cover, and the cycloid steering valve all-hydraulic steering gear that adopts wheel-tire tractor generally to adopt among the present invention; This Hydraulic Elements consumption is big, cost is low, steady quality, safe and reliable; Maintenance, convenient and swift, the easy buying of replacing, little, the easy arrangement of volume realizes with the wheeled car operating habit unified; Biggest advantage is; When hydraulic efficiency pressure system is malfunctioning, can realize the service brake of bearing circle manpower, have two-way safeguarding function, prior art does not possess These characteristics.
Dongbei Agricultural College's journal; In June, 1992; The 23rd the 2nd phase of volume, disclose a kind of physical construction in " analysis of crawler-tread tractor steering planetary " literary composition: the big cone gear of the internally toothed annulus of planetary mechanism and main gear is consolidated into one, and sun wheel and steering brake drum join together; Normal action type brake collar is arranged on the outer rim of steering brake drum; The big cone gear of satellite gear and main gear, sun wheel engagement, power is spread out of by planetary carrier, and the driving gear with a planetary carrier of same rotating speed, stopping brake drum and final transmission is housed on this side semiaxis; The stopping brake band of non-frequent effect is arranged on the outer rim of stopping brake drum, and driving gear drives ring gear and drive wheel.The structure of the left and right sides is identical, and a shared internally toothed annulus.The shortcoming of technique scheme is to require height to controlling technical ability, need be when a certain side turn at trac., and correct operating methods should be: the braking in a turn ribbon gymnastics longitudinal tie that spurs this side earlier; Change the sharp turn like need, can after control operating rod is moved the end to, step on the stretcher of brake collar; As step on the stretcher of brake collar earlier, because semiaxis power does not cut off, rotating speed is higher; Must increase the wearing and tearing of brake collar, brake wheel will produce rotation simultaneously, also can quicken the wearing and tearing of brake collar.After turning to end, should earlier stretcher be lifted fully, put back to control operating rod then, as carrying out conversely, all be disadvantageous to two brake collars then.
Summary of the invention
Technical matters to be solved by this invention be overcome deficiency of the prior art and provide that a kind of operating mode is simple, long service life, high efficiency, all-hydraulic bearing circle planet that safety is good turn to crawler-tread tractor.
The technical scheme that the present invention solves the problems of the technologies described above employing is: this all-hydraulic bearing circle planet turns to crawler-tread tractor; Comprise driving engine (5), power-transfer clutch (6), change speed gear box (7), back axle (8), final driving device (9), vehicle frame (10), Running System (11) and operator's compartment (12); It is characterized in that: also be provided with all-hydraulic wheel steering braking force control system (1), steering planetary steering link (2), right connecting rod assembly (3) and left connecting rod assembly (4); Described all-hydraulic wheel steering braking force control system (1) comprises braking in a turn valve (1A), braking in a turn oil cylinder group (1B), power steerig pump (1C), cycloid steering valve all-hydraulic steering gear (1D), brake pedal (1E), equipment oil pump (1F), bearing circle (1G), pressure-gradient control valve (1H) and fuel tank (1K); Described steering planetary steering link (2) comprises left lateral star steering hardware (2A), left lateral star steering hardware drg (2B), left half axle drg (2C), right lateral star steering hardware (2D), right lateral star steering hardware drg (2E), right axle shaft drg (2F), main gear bevel gear wheel (2G), steering planetary bull gear (2H), rear-axle casing (2K); Braking in a turn oil cylinder group (1B) comprises left steering brake cylinder (1B2) and right steering brake cylinder (1B1); Right steering brake cylinder (1B1) is connected through the braking platen alive of the right side in right connecting rod assembly (3) and the right axle shaft drg (2F) (2F1), and left steering brake cylinder (1B2) is braked the platen (2C1) of living through the left side in left connecting rod assembly (4) and the left half axle drg (2C) and is connected.The present invention adopts all-hydraulic wheel steering braking force control system, steering planetary steering link, left and right sides connecting rod assembly; When guaranteeing tractor steering; Chaufeur separates the steering planetary drg earlier and implements the braking of semiaxis drg again; During craspedodrome, unclamp the logic interlock order that the semiaxis drg is rejoined the steering planetary drg earlier, for the complete unity that realizes running on wheels mechanical steering operating mode such as crawler travel mechanical steering operating mode and wheel-tire tractor is given security.
Braking in a turn valve of the present invention (1A) comprises right brake activation valve (1A1), left brake activation valve (1A2), right steering valve (1A3), left steering valve (1A4), shuttle valve (1A5) and safety valve (1A6); Braking in a turn oil cylinder group (1B) comprises right steering brake cylinder (1B1) and left steering brake cylinder (1B2); Described fuel tank (1K) is connected with power steerig pump (1C); Power steerig pump (1C) is connected with the oil inlet of pressure-gradient control valve (1H); The hydraulic fluid port CF of pressure-gradient control valve (1H) respectively with cycloid steering valve all-hydraulic steering gear (1D) on hydraulic fluid port P and the hydraulic fluid port P of braking in a turn valve (1A) be connected; The hydraulic fluid port EF of pressure-gradient control valve (1H) is connected with equipment oil pump (1F); Bearing circle and cycloid steering valve all-hydraulic steering gear (1D) interlock; Hydraulic fluid port A on the cycloid steering valve all-hydraulic steering gear (1D) is connected with left steering valve (1A4) in the braking in a turn valve (1A); Left steering valve (1A4) is connected with left brake activation valve (1A2); Left side brake activation valve (1A2) is connected with left steering brake cylinder (1B2) in the braking in a turn oil cylinder group (1B), and the hydraulic fluid port B on the cycloid steering valve all-hydraulic steering gear (1D) is connected with right steering valve (1A3) in the braking in a turn valve (1A), and right steering valve (1A3) is connected with right brake activation valve (1A1); Right brake activation valve (1A1) is connected with right steering brake cylinder (1B1) in the braking in a turn oil cylinder group (1B); Hydraulic fluid port P on the cycloid steering valve all-hydraulic steering gear (1D) is connected with the hydraulic fluid port P of braking in a turn valve (1A), and the hydraulic fluid port P of braking in a turn valve (1A) is connected with safety valve (1A6) with shuttle valve (1A5) respectively, and shuttle valve (1A5) is connected with right steering brake cylinder (1B1) with left steering brake cylinder (1B2) respectively with right brake activation valve (1A1) through left brake activation valve (1A2); Hydraulic fluid port T on the cycloid steering valve all-hydraulic steering gear (1D) is connected with fuel tank, brake pedal (1E) and right brake activation valve (1A1) and left brake activation valve (1A2) interlock.This all-hydraulic wheel steering control of braking makes only needs steering wheel rotation when turning to, only need step on next brake pedal when service brake or deceleration, greatly facilitates the operation of chaufeur.Said structure can be realized bearing circle manual steering and service brake when power steerig pump breaks down in addition, realizes double insurance, has improved safety greatly.
Left lateral star steering hardware of the present invention (2A), left lateral star steering hardware drg (2B), left half axle drg (2C) are installed in the rear-axle casing (2K) with right lateral star steering hardware (2D), right lateral star steering hardware drg (2E), right axle shaft drg (2F) symmetry, said left lateral star steering hardware (2A) and the shared steering planetary bull gear of right lateral star steering hardware (2D) (2H).
Left lateral star steering hardware drg of the present invention (2B) comprises left lateral star drg driving disc spacing pressing (2B1), left lateral star brake friction dish (2B2), left lateral star arrester shell (2B3), left platen (2B4), left belleville spring (2B5), left spring stay bearing plate (2B6) and parts on the left side from lever connection (2B7);
Described left half axle drg (2C) comprises left half axle drg platen (2C1), left half axle drg driving disc spacing pressing (2C2), left half axle drg initiatively hub (2C3), left half axle brake friction dish (2C4), left thrust baring (2C5), left side braking platen (2C6) alive, the slow-witted platen (2C7) of left side braking, left side support steel ball (2C8) and left nut (2C9);
The splined hole of left lateral star drg driving disc spacing pressing (2B1) is connected with left sun wheel (2A5) left part castellated shaft in the left lateral star steering hardware (2A); Left lateral star brake friction dish (2B2) male splines is connected with left lateral star arrester shell (2B3) internal splined hole; Left lateral star arrester shell (2B3) links into an integrated entity with screw with left spring stay bearing plate (2B6), rear-axle casing (2K); The splined hole of left half axle drg driving disc spacing pressing (2C2) is connected with left half axle drg active hub (2C3) castellated shaft; Left half axle drg initiatively hub (2C3) splined hole is connected with left half axle (2A6) castellated shaft in the left lateral star steering hardware (2A); Part on the left side from lever connection (2B7) right-hand member and left platen (2B4) and fuse by screw thread; Part on the left side from lever connection (2B7) left end outside thread and left nut (2C9) and fuse by screw thread; Part on the left side from lever connection (2B7) middle part cylinder and the cooresponding circular hole free-running fit of left half axle drg platen (2C1) and can endwisely slip; Left side braking platen (2C6) alive, a left side are braked slow-witted platen (2C7) sky and are enclosed within on the axle journal of left lateral star arrester shell (2B3) left part, and platen (2C6) left lateral star arrester shell (2B3) the left part axle journal rotation relatively of living is braked on a left side;
Right lateral star steering hardware drg (2E), right axle shaft drg (2F) are symmetrical set with reference to left lateral star steering hardware drg (2B), left half axle drg (2C) respectively.
Right connecting rod assembly of the present invention (3) comprises upper right rocking arm (3A), bottom right rocking arm (3B), right connecting rod (3C); Said left connecting rod assembly (4) comprises upper left rocking arm (4A), left lower shake-changing arm (4B), left connecting rod (4C); Upper right rocking arm (3A) end is connected with right steering brake cylinder (1B1) piston rod; The other end is connected with an end of bottom right rocking arm (3B); The other end of bottom right rocking arm (3B) is connected with an end of right connecting rod (3C), and the other end of right connecting rod (3C) is connected with right braking platen alive (2F1); Upper left rocking arm (4A) end is connected with left steering brake cylinder (1B2) piston rod; The other end is connected with an end of left lower shake-changing arm (4B); The other end of left side lower shake-changing arm (4B) is connected with an end of left connecting rod (4C), and the other end of left connecting rod (4C) is connected with left side braking platen alive (2F1).The present invention connects all-hydraulic wheel steering braking force control system and steering planetary steering link through left and right sides connecting rod assembly, and left and right sides connecting rod assembly itself is simple in structure, transmission is accurate.
The present invention compared with prior art has the following advantages: realized the unification of wheel-tire tractor and crawler-tread tractor steering mode 1.; Two long steering track rods have been cancelled; With about two brake pedals be reduced to single brake pedal; Improved the turning to of chaufeur greatly, traveling comfort is controlled in service brake, safety and work efficiency, and the crawler-tread tractor chaufeur that is through with must be controlled the history of training for many years specially, alleviate the crawler-tread tractor chaufeur wheel contradiction of dragging the high salary difficulty to ask relatively greatly, in the rural area; Skilled wheel drags chaufeur a lot, but recruiting a skilled crawler-tread tractor chaufeur but is a very difficult thing; 2. double pump interflow pressure-gradient control valve energy-saving hydraulic system has improved complete machine work efficiency and fuel economy greatly; When complete machine need turn to; Pressure-gradient control valve can at first guarantee to turn to little oil pump to the steering swivel system fuel feeding, in the time need not turning to, turns to the fuel feeding junction of little oil pump to flow to the work oil pump; And traditional crawler-tread tractor turns to the extra flow of little oil pump to flow back to fuel tank in vain; Double pump interflow pressure-gradient control valve energy-saving hydraulic system not only can make full use of the hydraulic pressure ability that turns to little oil pump, and when work oil pump design selection, can reduce the requirement of power fluid capacity of pump, plays dual energy-conservation effect; 3. the cycloid steering valve all-hydraulic steering gear that adopts wheel-tire tractor generally to adopt improved complete machine q&r, reduced the complete machine cost; This Hydraulic Elements consumption is big, cost is low, steady quality, safe and reliable, maintenance, convenient and swift, the easy buying of replacing, little, the easy arrangement of volume; Realization is unified with the wheeled car operating habit; Biggest advantage is, can realize that when hydraulic efficiency pressure system is malfunctioning the driving of bearing circle manpower turns to and brakes, and has safe two-way safeguarding function.And at present on the agricultural crawler-tread tractor that traditional steering planetary turns to,, often adopt dedicated hydraulic power steering valve to reduce the steering track rod operating effort owing to require great effort very much when pulling steering track rod and stepping on brake pedal; But the hydraulic power-assisted steering valve drags volume of production and marketing to descend year by year owing to carrying out in recent years; Whole consumption constantly reduces, and original equipment manufacturer does not improve enthusiasm, and price is high but of poor quality; Often cause potential safety hazard; And bulky, heavy bad layout, in addition, at present on the agricultural crawler-tread tractor that traditional steering planetary turns to; Two semiaxis brake pedals are still by manpower about operation, so this patent has conspicuous advantage and promotional value.
Description of drawings
Fig. 1 is a structural representation of the present invention.
Fig. 2 is the all-hydraulic wheel steering braking force control system of a present invention schematic diagram.
Fig. 3 is a steering planetary steering link section-drawing of the present invention.
Fig. 4 is a C-C section-drawing among Fig. 3.
Fig. 5 is a D-D section-drawing among Fig. 3.
The specific embodiment
Referring to Fig. 1 ~ Fig. 5, the present invention includes all-hydraulic wheel steering braking force control system 1, steering planetary steering link 2, right connecting rod assembly 3, left connecting rod assembly 4, driving engine 5, power-transfer clutch 6, change speed gear box 7, back axle 8, final driving device 9, vehicle frame 10, Running System 11 and operator's compartment 12.Each parts annexation of the present invention: driving engine 5, power-transfer clutch 6, change speed gear box 7, back axle 8, final driving device 9 are connected on the vehicle frame 10; Driving engine 5 power are passed to Running System 11 through power-transfer clutch 6, change speed gear box 7, back axle 8, final driving device 9; The support zone of Running System 11 is connected with vehicle frame 10; The movable parts of Running System 11 is connected with final driving device 9; Operator's compartment 12 is connected on the vehicle frame 10; Steering planetary steering link 2, right connecting rod assembly 3, left connecting rod assembly 4 all are connected on the back axle 8, and all-hydraulic wheel steering braking force control system 1 is connected on the operator's compartment 12, and are connected with star steering hardware steering link 2 through right connecting rod assembly 3, left connecting rod assembly 4.
Described all-hydraulic wheel steering braking force control system 1 comprises braking in a turn valve 1A, braking in a turn oil cylinder group 1B, power steerig pump 1C, cycloid steering valve all-hydraulic steering gear 1D, brake pedal 1E, equipment oil pump 1F, bearing circle 1G, pressure-gradient control valve 1H and fuel tank 1K.
Described steering planetary steering link 2 comprises left lateral star steering hardware 2A, left lateral star steering hardware drg 2B, left half axle drg 2C, right lateral star steering hardware 2D, right lateral star steering hardware drg 2E, right axle shaft drg 2F, main gear bevel gear wheel 2G, steering planetary bull gear 2H, rear-axle casing 2K.
Described right connecting rod assembly 3 comprises upper right rocking arm 3A, bottom right rocking arm 3B, right connecting rod 3C.Said left connecting rod assembly 4 comprises upper left Rocker arm 4 A, left lower shake-changing arm 4B, left connecting rod 4C.
Described braking in a turn valve 1A comprises right brake activation valve 1A1, left brake activation valve 1A2, right steering valve 1A3, left steering valve 1A4, shuttle valve 1A5 and safety valve 1A6; Braking in a turn oil cylinder group 1B comprises right steering brake cylinder 1B1 and left steering brake cylinder 1B2; Described fuel tank 1K is connected with power steerig pump 1C; Power steerig pump 1C is connected with the oil inlet of pressure-gradient control valve 1H; The hydraulic fluid port CF of pressure-gradient control valve 1H respectively with cycloid steering valve all-hydraulic steering gear 1D on hydraulic fluid port P and the hydraulic fluid port P of braking in a turn valve 1A be connected; The hydraulic fluid port EF of pressure-gradient control valve 1H is connected with equipment oil pump 1F, bearing circle and cycloid steering valve all-hydraulic steering gear 1D interlock, and the hydraulic fluid port A on the cycloid steering valve all-hydraulic steering gear 1D is connected with left steering valve 1A4 among the braking in a turn valve 1A; Left steering valve 1A4 is connected with left brake activation valve 1A2; Left side brake activation valve 1A2 is connected with left steering brake cylinder 1B2 among the braking in a turn oil cylinder group 1B, and the hydraulic fluid port B on the cycloid steering valve all-hydraulic steering gear 1D is connected with right steering valve 1A3 among the braking in a turn valve 1A, and right steering valve 1A3 is connected with right brake activation valve 1A1; Right brake activation valve 1A1 is connected with right steering brake cylinder 1B1 among the braking in a turn oil cylinder group 1B; Hydraulic fluid port P on the cycloid steering valve all-hydraulic steering gear 1D is connected with the hydraulic fluid port P of braking in a turn valve 1A, and the hydraulic fluid port P of braking in a turn valve 1A is connected with safety valve 1A6 with shuttle valve 1A5 respectively, and shuttle valve 1A5 is connected with right steering brake cylinder 1B1 with left steering brake cylinder 1B2 respectively with right brake activation valve 1A1 through left brake activation valve 1A2; Hydraulic fluid port T on the cycloid steering valve all-hydraulic steering gear 1D is connected with fuel tank, and brake pedal 1E is hinged with the spool of right brake activation valve 1A1 and left brake activation valve 1A2 respectively.
Described left lateral star steering hardware 2A, left lateral star steering hardware drg 2B, left half axle drg 2C and right lateral star steering hardware 2D, right lateral star steering hardware drg 2E, right axle shaft drg 2F symmetry one by one are installed among the rear-axle casing 2K, the shared steering planetary bull gear 2H of said left lateral star steering hardware 2A and right lateral star steering hardware 2D.Left and right sides structure is symmetry fully, therefore only describes the left side structure, and the right side reference left side is symmetrical set.
Described left lateral star steering hardware 2A comprises that the big bearing 2A1 in a left side, left lateral star gear 2A2, left lateral star gear wheel shaft 2A3, left pinion carrier 2A4, left sun wheel 2A5, left half axle 2A6, left supporting seat 2A7, left-small-axis hold 2A8.
Described left lateral star steering hardware drg 2B comprises left lateral star drg driving disc spacing pressing 2B1, left lateral star brake friction dish 2B2, left lateral star arrester shell 2B3, left platen 2B4, left belleville spring 2B5, left spring stay bearing plate 2B6, parts on the left side from lever connection 2B7.Left lateral star steering hardware drg 2B is the tight drg of normal pressure, compresses through left belleville spring 2B5.
Described left half axle drg 2C comprises left half axle drg platen 2C1, left half axle drg driving disc spacing pressing 2C2, left half axle drg initiatively hub 2C3, left half axle brake friction dish 2C4, left thrust baring 2C5, left side braking platen 2C6 alive, the slow-witted platen 2C7 of left side braking, left side support steel ball 2C8, left nut 2C9.Left half axle drg 2C is normal breakaway detents.
Main gear bevel gear wheel 2G and steering planetary bull gear 2H connect as one; Left lateral star gear 2A2 and steering planetary bull gear 2H engagement; Simultaneously with left sun wheel 2A5 engagement; Left lateral star gear 2A2 sky is enclosed within on the left lateral star gear wheel shaft 2A3 of left pinion carrier 2A4; The splined hole of left side pinion carrier 2A4 is connected with left half axle 2A6 castellated shaft; Left half axle 2A6 has three sections male spliness, and the splined hole of left lateral star drg driving disc spacing pressing 2B1 (seeing mark A place among Fig. 3) is connected with left sun wheel 2A5 left part castellated shaft (seeing mark A place among Fig. 3), and left lateral star brake friction dish 2B2 male splines (seeing mark B place among Fig. 3) is connected with left lateral star arrester shell 2B3 internal splined hole (seeing mark B place among Fig. 3); Left lateral star arrester shell 2B3 and left spring stay bearing plate 2B6, rear-axle casing 2K link into an integrated entity with screw; The splined hole of left half axle drg driving disc spacing pressing 2C2 (seeing mark C place among Fig. 3) is connected with left half axle drg active hub 2C3 castellated shaft (seeing mark C place among Fig. 3), and left half axle drg initiatively hub 2C3 splined hole (seeing mark D place among Fig. 3) is connected with left half axle 2A6 castellated shaft (seeing mark D place among Fig. 3), parts on the left side from lever connection 2B7 right-hand member and left platen 2B4 to fuse by screw thread; Part on the left side from lever connection, 2B7 left end outside thread and left nut 2C9 fuse by screw thread.Parting on the left side from lever connection 2B7 is stepped shaft; Be provided with 6 altogether; Part on the left side from lever connection 2B7 along left half axle drg platen 2C1 axis circumference rectangular distribution; Part on the left side from lever connection 2B7 middle part small cylinder and the cooresponding circular hole of left half axle drg platen 2C1 (seeing mark E place among Fig. 3) free-running fit and can slide vertically, the ladder cylinder face of joint that parts on the left side on lever connection 2B7 is resisted against left half axle drg platen 2C1 right side.Left side braking platen 2C6 alive, the slow-witted platen 2C7 sky of left side braking are enclosed within on the left lateral star arrester shell 2B3 left part axle journal (seeing flag F place among Fig. 3); Left side braking platen 2C6 alive left lateral star arrester shell 2B3 left part axle journal (seeing flag F place among Fig. 3) relatively rotates; Rotational angle is controlled by chaufeur; The different turn radius of the corresponding trac. of different angles, rotational angle is big more, and turn radius is more little.
Upper left Rocker arm 4 A one end is connected with left steering brake cylinder 1B2 piston rod, and the other end is connected with the end of left lower shake-changing arm 4B, and the other end of left lower shake-changing arm 4B is connected with the end of left connecting rod 4C, and the other end of left connecting rod 4C is connected with left side braking platen 2C6 alive.Right connecting rod assembly 3 structures and left connecting rod assembly 4 symmetries, annexation is identical with left connecting rod assembly 4.
The drive connection of each parts during the crawler-tread tractor straight-line travelling: driving engine 5 power through power-transfer clutch 6, change speed gear box 7 reach back axle 8, back axle 8 with the power mean allocation to about final driving device 9 increase and pass to Running System 11 after turning round deceleration; The support zone of Running System 11 is connected with vehicle frame 10; About the live axle of final driving device 9 the power mean allocation is driven Running System 11 left and right sidesing driving wheel, left and right sides crawler belt directly and ground effects; The antagonistic force that left and right sides crawler belt produces identical size, driven caterpillar tracks trac. straight-line travelling are faced in ground; The drive connection of each parts during crawler-tread tractor left steering (right steering in like manner): driving engine 5 power are through power-transfer clutch 6, change speed gear box 7 back axles 8; Chaufeur turns left to move bearing circle and sends signal to all-hydraulic wheel steering braking force control system 1; Through left connecting rod assembly 4 control star steering hardware steering links 2; The power of back axle 8 is final driving device 9 about no longer mean allocation arrives, and the power that is assigned to the final driving device in a left side causes the left and right sides crawler belt of Running System 11 to produce antagonistic force left small and right large less than the final driving device in the right side; Realize the crawler-tread tractor left steering; Continue to turn left to move bearing circle, ground constantly reduces in the face of the antagonistic force that left crawler belt produces, and the turnon left radius constantly reduces.Right steering in like manner.
Though the present invention with embodiment openly as above; But it is not in order to limit protection scope of the present invention; Any technical personnel of being familiar with this technology, change and the retouching in not breaking away from design of the present invention and scope, done all should belong to protection scope of the present invention.
Claims (5)
1. an all-hydraulic bearing circle planet turns to crawler-tread tractor; Comprise driving engine (5), power-transfer clutch (6), change speed gear box (7), back axle (8), final driving device (9), vehicle frame (10), Running System (11) and operator's compartment (12); It is characterized in that: also be provided with all-hydraulic wheel steering braking force control system (1), steering planetary steering link (2), right connecting rod assembly (3) and left connecting rod assembly (4); Described all-hydraulic wheel steering braking force control system (1) comprises braking in a turn valve (1A), braking in a turn oil cylinder group (1B), power steerig pump (1C), cycloid steering valve all-hydraulic steering gear (1D), brake pedal (1E), equipment oil pump (1F), bearing circle (1G), pressure-gradient control valve (1H) and fuel tank (1K); Described steering planetary steering link (2) comprises left lateral star steering hardware (2A), left lateral star steering hardware drg (2B), left half axle drg (2C), right lateral star steering hardware (2D), right lateral star steering hardware drg (2E), right axle shaft drg (2F), main gear bevel gear wheel (2G), steering planetary bull gear (2H), rear-axle casing (2K); Braking in a turn oil cylinder group (1B) comprises left steering brake cylinder (1B2) and right steering brake cylinder (1B1); Right steering brake cylinder (1B1) is connected through the braking platen alive of the right side in right connecting rod assembly (3) and the right axle shaft drg (2F) (2F1), and left steering brake cylinder (1B2) is braked the platen (2C1) of living through the left side in left connecting rod assembly (4) and the left half axle drg (2C) and is connected.
2. all-hydraulic bearing circle planet according to claim 1 turns to crawler-tread tractor; It is characterized in that: described braking in a turn valve (1A) comprises right brake activation valve (1A1), left brake activation valve (1A2), right steering valve (1A3), left steering valve (1A4), shuttle valve (1A5) and safety valve (1A6); Braking in a turn oil cylinder group (1B) comprises right steering brake cylinder (1B1) and left steering brake cylinder (1B2); Described fuel tank (1K) is connected with power steerig pump (1C); Power steerig pump (1C) is connected with the oil inlet of pressure-gradient control valve (1H); The hydraulic fluid port CF of pressure-gradient control valve (1H) respectively with cycloid steering valve all-hydraulic steering gear (1D) on hydraulic fluid port P and the hydraulic fluid port P of braking in a turn valve (1A) be connected; The hydraulic fluid port EF of pressure-gradient control valve (1H) is connected with equipment oil pump (1F); Bearing circle and cycloid steering valve all-hydraulic steering gear (1D) interlock; Hydraulic fluid port A on the cycloid steering valve all-hydraulic steering gear (1D) is connected with left steering valve (1A4) in the braking in a turn valve (1A); Left steering valve (1A4) is connected with left brake activation valve (1A2); Left side brake activation valve (1A2) is connected with left steering brake cylinder (1B2) in the braking in a turn oil cylinder group (1B), and the hydraulic fluid port B on the cycloid steering valve all-hydraulic steering gear (1D) is connected with right steering valve (1A3) in the braking in a turn valve (1A), and right steering valve (1A3) is connected with right brake activation valve (1A1); Right brake activation valve (1A1) is connected with right steering brake cylinder (1B1) in the braking in a turn oil cylinder group (1B); Hydraulic fluid port P on the cycloid steering valve all-hydraulic steering gear (1D) is connected with the hydraulic fluid port P of braking in a turn valve (1A), and the hydraulic fluid port P of braking in a turn valve (1A) is connected with safety valve (1A6) with shuttle valve (1A5) respectively, and shuttle valve (1A5) is connected with right steering brake cylinder (1B1) with left steering brake cylinder (1B2) respectively with right brake activation valve (1A1) through left brake activation valve (1A2); Hydraulic fluid port T on the cycloid steering valve all-hydraulic steering gear (1D) is connected with fuel tank, brake pedal (1E) and right brake activation valve (1A1) and left brake activation valve (1A2) interlock.
3. all-hydraulic bearing circle planet according to claim 1 turns to crawler-tread tractor; It is characterized in that: described left lateral star steering hardware (2A), left lateral star steering hardware drg (2B), left half axle drg (2C) are installed in the rear-axle casing (2K) with right lateral star steering hardware (2D), right lateral star steering hardware drg (2E), right axle shaft drg (2F) symmetry, said left lateral star steering hardware (2A) and the shared steering planetary bull gear of right lateral star steering hardware (2D) (2H).
4. all-hydraulic bearing circle planet according to claim 3 turns to crawler-tread tractor, it is characterized in that: described left lateral star steering hardware drg (2B) comprises left lateral star drg driving disc spacing pressing (2B1), left lateral star brake friction dish (2B2), left lateral star arrester shell (2B3), left platen (2B4), left belleville spring (2B5), left spring stay bearing plate (2B6) and parts on the left side from lever connection (2B7);
Described left half axle drg (2C) comprises left half axle drg platen (2C1), left half axle drg driving disc spacing pressing (2C2), left half axle drg initiatively hub (2C3), left half axle brake friction dish (2C4), left thrust baring (2C5), left side braking platen (2C6) alive, the slow-witted platen (2C7) of left side braking, left side support steel ball (2C8) and left nut (2C9);
The splined hole of left lateral star drg driving disc spacing pressing (2B1) is connected with left sun wheel (2A5) left part castellated shaft in the left lateral star steering hardware (2A); Left lateral star brake friction dish (2B2) male splines is connected with left lateral star arrester shell (2B3) internal splined hole; Left lateral star arrester shell (2B3) links into an integrated entity with screw with left spring stay bearing plate (2B6), rear-axle casing (2K); The splined hole of left half axle drg driving disc spacing pressing (2C2) is connected with left half axle drg active hub (2C3) castellated shaft; Left half axle drg initiatively hub (2C3) splined hole is connected with left half axle (2A6) castellated shaft in the left lateral star steering hardware (2A); Part on the left side from lever connection (2B7) right-hand member and left platen (2B4) and fuse by screw thread; Part on the left side from lever connection (2B7) left end outside thread and left nut (2C9) and fuse by screw thread; Part on the left side from lever connection (2B7) middle part cylinder and the cooresponding circular hole free-running fit of left half axle drg platen (2C1) and can endwisely slip; Left side braking platen (2C6) alive, a left side are braked slow-witted platen (2C7) sky and are enclosed within on the axle journal of left lateral star arrester shell (2B3) left part, and platen (2C6) left lateral star arrester shell (2B3) the left part axle journal rotation relatively of living is braked on a left side;
Right lateral star steering hardware drg (2E), right axle shaft drg (2F) are symmetrical set with reference to left lateral star steering hardware drg (2B), left half axle drg (2C) respectively.
5. all-hydraulic bearing circle planet according to claim 1 turns to crawler-tread tractor; It is characterized in that: described left connecting rod assembly (4) comprises upper left rocking arm (4A), left lower shake-changing arm (4B), left connecting rod (4C); Upper left rocking arm (4A) end is connected with left steering brake cylinder (1B2) piston rod; The other end is connected with an end of left lower shake-changing arm (4B); The other end of left side lower shake-changing arm (4B) is connected with an end of left connecting rod (4C), and the other end of left connecting rod (4C) is connected with left side braking platen alive (2C6), and right connecting rod assembly (3) is symmetrical set with reference to left connecting rod assembly (4).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210111102.1A CN102649448B (en) | 2012-04-17 | 2012-04-17 | Hydraulic steering wheel planetary steering crawler tractor |
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| CN201210111102.1A CN102649448B (en) | 2012-04-17 | 2012-04-17 | Hydraulic steering wheel planetary steering crawler tractor |
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| CN102649448A true CN102649448A (en) | 2012-08-29 |
| CN102649448B CN102649448B (en) | 2014-07-02 |
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| CN105128933A (en) * | 2015-04-07 | 2015-12-09 | 中国人民解放军装甲兵工程学院 | Pneumatic manipulation device of planet steering mechanism |
| CN106184365A (en) * | 2016-08-30 | 2016-12-07 | 第拖拉机股份有限公司 | Endless-track vehicle steering control mechanism |
| CN115107872A (en) * | 2022-05-24 | 2022-09-27 | 无锡拉菲可科技有限公司 | Steering mechanism of crawler tractor |
| US11472395B2 (en) | 2020-02-28 | 2022-10-18 | Cnh Industrial America Llc | System and method for executing multi-mode turns with a work vehicle |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| FR3049248B1 (en) * | 2016-03-25 | 2018-04-20 | Poclain Hydraulics Industrie | REDUNDANT BRAKING DEVICE |
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|---|---|
| CN102649448B (en) | 2014-07-02 |
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