CN102233898A - Steering device for engineering vehicle - Google Patents
Steering device for engineering vehicle Download PDFInfo
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- CN102233898A CN102233898A CN 201010160372 CN201010160372A CN102233898A CN 102233898 A CN102233898 A CN 102233898A CN 201010160372 CN201010160372 CN 201010160372 CN 201010160372 A CN201010160372 A CN 201010160372A CN 102233898 A CN102233898 A CN 102233898A
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- 230000009977 dual effect Effects 0.000 claims description 5
- 239000003921 oil Substances 0.000 description 63
- 230000009183 running Effects 0.000 description 7
- 230000033001 locomotion Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000000354 decomposition reaction Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000010720 hydraulic oil Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
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Abstract
The invention relates to a steering device for an engineering vehicle. The device is characterized in that: a front wheel steering system comprises a left steering chain wheel, a left double chain wheel, coaxially arranged left swing chain wheel and left swing gear, a right steering chain wheel, a right double chain wheel, coaxially arranged right swing chain wheel, right swing gear and front swing gear, and a transversely arranged front double-piston steering oil cylinder; a front swing rack meshed with the front swing gear is arranged between the two pistons of the front double-piston steering oil cylinder; a rear wheel steering system comprises a rear steering chain wheel, coaxially arranged rear swing chain wheel and rear swing gear, and a transversely arranged rear double-piston steering oil cylinder; a rear swing rack meshed with the rear swing gear is arranged between the two pistons of the rear double-piston steering oil cylinder; and the front double-piston steering oil cylinder and the rear double-piston steering oil cylinder are connected with a fully hydraulic steering device through a hydraulic control system. The steering device for the engineering vehicle has a novel structure and controls two front wheels and rear wheels to steer through a hydraulic device.
Description
Technical field
The present invention relates to the steering hardware of engineering trucks such as a kind of fork truck, mobile working platform, storehouse equipment, it is mainly used in turning to of control vehicle.
Background technology
At present, domestic fork truck all is the mode that adopts rear-axle steering, car load has only a cover steering swivel system, steering hardware has transverse hydro-cylinder formula, ladder type mechanism formula or back-wheel drive steering-type, such fork truck can only former and later two direction runnings, carry out shelf or very difficult during by crawlway at the long object of carrying.Expand the function of common fork truck, make fork truck can carry ordinary goods, can carry than surplus spare again and enter crawlway, the steering hardware of above-mentioned several present uses just can not satisfy the requirement on the fork truck energy merit.
As an application number is a kind of universally driving fork truck the Chinese invention patent " universally driving fork truck " of CN200510124590.X (publication number is CN1789105A) has disclosed, include a vehicle frame, vehicle frame links to each other with propons, propons connects door frame, two ends at propons are provided with a left side, off front wheel, propons is fixed with a left side, right synchronizer gear group, rear end at vehicle frame is provided with trailing wheel, the back wheel flutter is set on the trailing wheel, central frame beam is equipped with the electromagnetic braking power-transfer clutch, fixing the near front wheel steering gear on the near front wheel, fixing off front wheel steering gear on the off front wheel, the off front wheel steering gear links to each other with the lower gear of right synchronizer gear group, the cogging to cog with left synchronizer gear group of right synchronizer gear group is connected, the intermediate gear of left side synchronizer gear group is connected with the near front wheel steering gear, and the lower gear of left synchronizer gear group links to each other with the lower gear of electromagnetic braking power-transfer clutch, and cogging of electromagnetic braking power-transfer clutch links to each other with the rear-axle steering gear.This fork truck can turn over certain angle simultaneously by three wheels of fork truck and realize all driection running.
Though aforementioned fork truck can be realized all driection running, but three wheels are to drive by steering motor before and after it, so cost is higher, and three wheel anglecs of rotation equate, the identical interlock of hand of rotation is rotated, thus its when all driection running, car can only move as the plane with a certain attitude, and can not freely turn to according to actual condition, it is very inconvenient to operate.
Summary of the invention
Technical matters to be solved by this invention is to provide a kind of to control the steering hardware of the engineering truck of two front-wheels and rear-axle steering at above-mentioned prior art present situation by hydraulic efficiency gear, and it is a kind of novel structure and the low steering hardware of cost.
The present invention solves the problems of the technologies described above the technical scheme that is adopted: a kind of steering hardware of engineering truck, comprise the front-wheel steering system that control the near front wheel and off front wheel turn to, the rear-axle steering system of control rear-axle steering, it is characterized in that: described front-wheel steering system comprises can drive the left steering sprocket wheel that the near front wheel turns to; Left side duplicate sprocket, the lower-left sprocket wheel of left duplicate sprocket is connected with the left steering sprocket wheel by left front chain; Coaxial mounted left side swing sprocket wheel and left wobble gear, left side swing sprocket wheel is connected with the upper left sprocket wheel of left duplicate sprocket by left chain; Can drive the right steering sprocket wheel that off front wheel turns to; Right duplicate sprocket, the bottom right sprocket wheel of right duplicate sprocket is connected with the right steering sprocket wheel by right front chain; Coaxial mounted right swing sprocket wheel, right wobble gear and preceding wobble gear, described right swing sprocket wheel is connected described right wobble gear and the mutual external toothing of left wobble gear with the upper right sprocket wheel of right duplicate sprocket by right chain; Horizontal preceding double-piston turns to oil cylinder, and this preceding double-piston turns between the two-piston of oil cylinder and is provided with the forward swing carry-over bar, this forward swing carry-over bar and described before the wobble gear engagement; Described rear-axle steering system comprise can drive rear-axle steering after turn to sprocket wheel; Coaxial mounted back swing sprocket wheel and back wobble gear, described back swing sprocket wheel by rear chain with after turn to sprocket wheel to be connected; Horizontal back double-piston turns to oil cylinder, and this back double-piston turns to and is provided with swing tooth bar in back between the two-piston of oil cylinder, and this back swing tooth bar meshes with described back wobble gear; Double-piston turns to oil cylinder to turn to oil cylinder to link to each other with an all-hydraulic steering gear by the hydraulic control system with logic control program with the back double-piston before described.
Above-mentioned hydraulic control system comprises first electromagnetic valve, second electromagnetic valve, the 3rd electromagnetic valve and the 4th electromagnetic valve that is installed on the valve plate, and described valve plate is provided with first delivery port, second delivery port, the 3rd delivery port and the 4th delivery port and first input port, second input port, the 3rd input port and the 4th input port; The A mouth of described first electromagnetic valve and the 3rd electromagnetic valve is connected and communicates with first delivery port, and first delivery port turns to the left chamber of oil cylinder to be communicated with by oil pipe and preceding double-piston; The B mouth of described first electromagnetic valve and the 3rd electromagnetic valve is connected and communicates with second delivery port, and second delivery port turns to the right chamber of oil cylinder to be communicated with by oil pipe and preceding double-piston; The P mouth of described second electromagnetic valve and the 4th electromagnetic valve is connected and communicates with the 3rd delivery port, and the 3rd delivery port turns to the left chamber of oil cylinder to be communicated with by oil pipe with the back double-piston; The T mouth of described second electromagnetic valve and the 4th electromagnetic valve is connected and communicates with the 4th delivery port, and the 4th delivery port turns to the right chamber of oil cylinder to be communicated with by oil pipe with the back double-piston; The T mouth of described first electromagnetic valve and the A mouth of second electromagnetic valve is connected and communicate with first input port, the P mouth of described first electromagnetic valve and the B mouth of second electromagnetic valve is connected and communicate with second input port, described first input port is connected with the A mouth of all-hydraulic steering gear by oil pipe, and described second input port is connected with the B mouth of all-hydraulic steering gear by oil pipe; The T mouth of described the 3rd electromagnetic valve and the 4th electromagnetic valve A mouth are connected and communicate with the 3rd input port, the P mouth of described the 3rd electromagnetic valve and the B mouth of the 4th electromagnetic valve is connected and communicate with the 4th input port; The 5th electromagnetic valve, the A mouth of the 5th electromagnetic valve is connected with described the 3rd input port by oil pipe, the B mouth of the 5th electromagnetic valve is connected with described the 4th input port by oil pipe, the P mouth of the 5th electromagnetic valve is connected with oil pump by oil pipe, the T mouth of the 5th electromagnetic valve is connected with the P mouth of all-hydraulic steering gear by oil pipe, and the T mouth of all-hydraulic steering gear then is communicated with the tank drainback mouth by oil pipe; The function switch dual gear switch of forming by first switch and second switch, under the first switch connection state, the 3rd electromagnetic valve and the 5th electromagnetic valve get, first electromagnetic valve, second electromagnetic valve and the outage of the 4th electromagnetic valve, under the second switch on-state, the 4th electromagnetic valve and the 5th electromagnetic valve get electric, first electromagnetic valve, second electromagnetic valve and the outage of the 3rd electromagnetic valve; First travel switch when moving to maximum travel position in order to detect the forward swing carry-over bar, under the state that first travel switch is connected, second electromagnetic valve gets electric, first electromagnetic valve, the 3rd electromagnetic valve, the 4th electromagnetic valve and the outage of the 5th electromagnetic valve; Second travel switch when moving to maximum travel position in order to detect back swing tooth bar, under the state that second travel switch is connected, first electromagnetic valve gets electric, second electromagnetic valve, the 3rd electromagnetic valve, the 4th electromagnetic valve and the outage of the 5th electromagnetic valve.
This hydraulic control system can realize before the rotation that double-piston turns to oil cylinder and back double-piston to turn to oil cylinder locking or whether is connected with all-hydraulic steering gear, and then the realization bearing circle is to the control that turns to of front-wheel and trailing wheel.Certainly this hydraulic control system also can be selected other fluid control structure.
Above-mentioned first electromagnetic valve, second electromagnetic valve, the 3rd electromagnetic valve and the 4th electromagnetic valve are two-position four-way solenoid valve, and described the 5th electromagnetic valve is a three position four-way electromagnetic valve.
The P mouth of above-mentioned the 5th electromagnetic valve is stablized flow divider valve by single channel and is connected with oil pump.Make hydraulic efficiency pressure system safer.
Compared with prior art, the invention has the advantages that: when the longitudinal driving of vehicle front and back, the near front wheel of vehicle and off front wheel are in vertical vertical position and locked, the oil circuit of all-hydraulic steering gear turns to oil cylinder to connect with the back double-piston like this, the operator can control the rotational angle of trailing wheel by the steering dish, finally realizes the direction control when longitudinal direction of car travelled; When the left and right vehicle wheel cross running, the trailing wheel of vehicle is in transverse horizontal position and locked, the oil circuit of all-hydraulic steering gear and preceding double-piston turn to oil cylinder to connect, the operator can control the rotational angle of front-wheel by the steering dish, the angular dimension equidirectional that left and right sides front-wheel rotates is opposite, realizes that finally the direction when lateral direction of car travelled is controlled; Whole process direction of passage dish is controlled, and need not CD-ROM drive motor and electromagnetic braking power-transfer clutch, so the cost of this steering hardware is relatively low.
Description of drawings
Fig. 1 is a front-wheel steering system birds-eye view in the embodiment of the invention;
Fig. 2 is a rear-axle steering system birds-eye view in the embodiment of the invention;
Fig. 3 is a front-wheel steering system decomposition scheme drawing in the embodiment of the invention;
Fig. 4 is a rear-axle steering system decomposition scheme drawing in the embodiment of the invention;
Fig. 5 is the steering principle figure during longitudinal driving before and after the engineering truck in the embodiment of the invention;
Fig. 6 is the steering principle figure the during cross running of the engineering truck left and right sides in the embodiment of the invention.
Fig. 7 is for turning to the schematic diagram of hydraulic control system in the embodiment of the invention.
The specific embodiment
Embodiment describes in further detail the present invention below in conjunction with accompanying drawing.
Shown in Fig. 1～6, be a preferred embodiment of the present invention.
A kind of steering hardware of engineering truck comprises the front-wheel steering system that control the near front wheel 1 and off front wheel 2 turn to, the rear-axle steering system that control trailing wheel 3 turns to, and the front-wheel steering system generally is installed on the propons of engineering truck.
Comprise as Fig. 1,3 front-wheel steering systems and can drive the left steering sprocket wheel 4 that the near front wheel 1 turns to.
Left side duplicate sprocket 5, the lower-left sprocket wheel 51 of left duplicate sprocket is connected with left steering sprocket wheel 4 by left front chain 6.
Coaxial mounted left side swing sprocket wheel 6 and left wobble gear 7, left side swing sprocket wheel 7 is connected with the upper left sprocket wheel 52 of left duplicate sprocket by left chain 8.
Can drive the right steering sprocket wheel 9 that off front wheel 2 turns to.
Right duplicate sprocket 10, the bottom right sprocket wheel 101 of right duplicate sprocket is connected with right steering sprocket wheel 9 by right front chain 11.
Coaxial mounted right swing sprocket wheel 12, right wobble gear 13 and preceding wobble gear 14, right like this swing sprocket wheel 12, right wobble gear 13 and preceding wobble gear 14 can rotate synchronously, right swing sprocket wheel 13 is connected with the upper right sprocket wheel 102 of right duplicate sprocket by right chain 15, right wobble gear 13 and left wobble gear 7 mutual external toothings.
Horizontal preceding double-piston turns to oil cylinder 16, preceding double-piston turns to oil cylinder 16 to comprise a left side half cylinder body and right half cylinder body that is provided with at interval, be provided with left piston in half cylinder body of a left side, be provided with right piston in right half cylinder body, between left piston and right piston, be provided with forward swing carry-over bar 17, conflict with left piston and right piston respectively in the two ends of forward swing carry-over bar 17, the mobile forward swing carry-over bar 17 that can drive of left piston or right piston moves like this, and this forward swing carry-over bar 17 and preceding wobble gear 14 engagements.
Shown in Fig. 2,4, the rear-axle steering system comprise can drive that trailing wheel 3 turns to after turn to sprocket wheel 18.
Coaxial mounted back swing sprocket wheel 19 and back wobble gear 20, back swing sprocket wheel 20 by rear chain 21 with after turn to sprocket wheel 18 to be connected.
Horizontal back double-piston turns to oil cylinder 22, preceding double-piston turns to oil cylinder 22 to comprise a left side half cylinder body and right half cylinder body that is provided with at interval, be provided with left piston in half cylinder body of a left side, be provided with right piston in right half cylinder body, between left piston and right piston, be provided with back swing tooth bar 23, conflict with left piston and right piston respectively in the two ends of back swing tooth bar 23, the mobile forward swing carry-over bar 23 that can drive of left piston or right piston moves like this, and this forward swing carry-over bar 23 and preceding wobble gear 14 engagements.
Preceding double-piston turns to oil cylinder 16 to turn to oil cylinder 22 to link to each other with an all-hydraulic steering gear 24 by the hydraulic control system with logic control program with the back double-piston, the fuel-displaced direction and the oil pump capacity of the rotation energy control all-hydraulic steering gear 24 of bearing circle.
As shown in Figure 7, hydraulic control system comprises the first electromagnetic valve L1, the second electromagnetic valve L2, the 3rd electromagnetic valve L3 and the 4th electromagnetic valve L4 that is installed on the valve plate, and valve plate is provided with the first delivery port a, the second delivery port b, the 3rd delivery port c and the 4th delivery port d and the first input port e, the second input port f, the 3rd input port g and the 4th input port h.
The A mouth of the first electromagnetic valve L1 and the 3rd electromagnetic valve L3 is connected and communicates with the first delivery port a, and the first delivery port a turns to the left chamber of oil cylinder 16 to be communicated with by oil pipe and preceding double-piston.
The B mouth of the first electromagnetic valve L1 and the 3rd electromagnetic valve L3 is connected and communicates with the second delivery port b, and the second delivery port b turns to the right chamber of oil cylinder 16 to be communicated with by oil pipe and preceding double-piston.
The P mouth of the second electromagnetic valve L2 and the 4th electromagnetic valve L4 is connected and communicates with the 3rd delivery port c, and the 3rd delivery port c turns to the left chamber of oil cylinder 22 to be communicated with by oil pipe with the back double-piston.
The T mouth of the second electromagnetic valve L2 and the 4th electromagnetic valve L4 is connected and communicates with the 4th delivery port d, and the 4th delivery port d turns to the right chamber of oil cylinder 22 to be communicated with by oil pipe with the back double-piston.
The A mouth of the T mouth of the first electromagnetic valve L1 and the second electromagnetic valve L2 is connected and communicates with the first input port e, the B mouth of the P mouth of the first electromagnetic valve L1 and the second electromagnetic valve L2 is connected and communicates with the second input port f, the first input port e is connected with the A mouth of all-hydraulic steering gear 24 by oil pipe, and the second input port f is connected with the B mouth of all-hydraulic steering gear 24 by oil pipe; The A mouth of the T mouth of the 3rd electromagnetic valve L3 and the 4th electromagnetic valve L4 is connected and communicates with the 3rd input port g, and the B mouth of the P mouth of the 3rd electromagnetic valve L3 and the 4th electromagnetic valve L4 is connected and communicates with the 4th input port h.
The 5th electromagnetic valve L5, the A mouth of the 5th electromagnetic valve L5 is connected with the 3rd input port g by oil pipe, the B mouth of the 5th electromagnetic valve L5 is connected with the 4th input port h by oil pipe, the P mouth of the 5th electromagnetic valve L5 is stablized flow divider valve 25 by single channel and is connected with oil pump, the T mouth of the 5th electromagnetic valve L5 is connected with the P mouth of all-hydraulic steering gear 24 by oil pipe, and the T mouth of all-hydraulic steering gear 24 then is communicated with the tank drainback mouth by oil pipe.
The function switch dual gear switch of forming by first K switch 1 and second switch K2, under first K switch, 1 on-state, the 3rd electromagnetic valve L3 and the 5th electromagnetic valve L5 get, the first electromagnetic valve L1, the second electromagnetic valve L2 and the 4th electromagnetic valve L4 outage, under second switch K2 on-state, the 4th electromagnetic valve L4 and the 5th electromagnetic valve L5 get electric, the first electromagnetic valve L1, the second electromagnetic valve L2 and the 3rd electromagnetic valve L3 outage.
The first travel switch K3 when moving to maximum travel position in order to detect forward swing carry-over bar 17, under the state that the first travel switch K3 connects, the second electromagnetic valve L2 gets electric, the first electromagnetic valve L1, the 3rd electromagnetic valve L3, the 4th electromagnetic valve L4 and the 5th electromagnetic valve L5 outage.
The second travel switch K4 when moving to maximum travel position in order to detect back swing tooth bar 23, under the state that the second travel switch K4 connects, the first electromagnetic valve L1 gets electric, the second electromagnetic valve L2, the 3rd electromagnetic valve L3, the 4th electromagnetic valve L4 and the 5th electromagnetic valve L5 outage.
The first electromagnetic valve L1, the second electromagnetic valve L2, the 3rd electromagnetic valve L3 and the 4th electromagnetic valve L4 are two-position four-way solenoid valve in the present embodiment, and the 5th electromagnetic valve L5 is a three position four-way electromagnetic valve.
The principle of work and the process of present embodiment are as follows.
Front-wheel steering system steering principle: when current double-piston turns to oil cylinder 16 left chamber oil-feeds, forward swing carry-over bar 17 moves right, wobble gear 14, right wobble gear 13 and right swing sprocket wheel 12 keep coaxial left-hand revolution before driving, because right wobble gear 13 is meshing with each other with left wobble gear 7, left side wobble gear 7 and left side swing sprocket wheel 6 clickwises, thus make the near front wheel 1 clickwise, off front wheel 2 left-hand revolutions, the angular dimension that left and right sides front-wheel 1,2 rotates equates that direction is opposite.
Rear-axle steering system steering principle: when the back double-piston turned to oil cylinder 22 left chamber oil-feeds, back swing tooth bar 23 moved right, and drove back wobble gear 20 and back swing sprocket wheel 19 clickwises, thereby made trailing wheel 3 clickwises.
When vehicle needs longitudinal driving, press first K switch 1 in the function switch dual position switch, first K switch 1 is connected second switch K2 and is disconnected, at this moment the 3rd electromagnetic valve L3 and the 5th electromagnetic valve L5 get, the first electromagnetic valve L1, the second electromagnetic valve L2 and the 4th electromagnetic valve L4 outage, oil pump 26 is beaten hydraulic oil forward, and double-piston turns to oil cylinder 16 right chambeies, when forward swing carry-over bar 17 is moved to the left maximum position, spacing collision block on the forward swing carry-over bar 17 collides the first travel switch K3, the first travel switch K3 is connected, at this moment, the second electromagnetic valve L2 gets, the first electromagnetic valve L1, the 3rd electromagnetic valve L3, the 4th electromagnetic valve L4 and the 5th electromagnetic valve L5 outage, preceding double-piston turns to oil cylinder 16 locked, and promptly the near front wheel 1 of vehicle and off front wheel 2 are in vertical vertical position and locked, and the oil circuit of all-hydraulic steering gear 24 turns to oil cylinder 22 connections with the back double-piston simultaneously, the operator can come the travel direction of control vehicle by steering dish control rear-axle steering like this.
When deflecting into as shown in Figure 5 orientation as trailing wheel 3, the track of the near front wheel 1, off front wheel 2 and trailing wheel 3 motions is exactly three circular arcs among Fig. 5, these three circular arcs are concentric circless, when operator's direction of operating dish, when making the continuous deflection of the corner of trailing wheel 3, the center of circle of three wheel path of motions will be on the two front-wheel lines of centres sway, engineering truck such as fork truck are turned to different turn radiuss.This process is exactly the direction control of longitudinal direction of car when travelling.
When vehicle needs cross running, press function switch dual position switch once more, second switch K2 connects first K switch 1 and disconnects, at this moment the 4th electromagnetic valve L4 and the 5th electromagnetic valve L5 get, the first electromagnetic valve L1, the second electromagnetic valve L2 and the 3rd electromagnetic valve L3 outage, oil pump 26 is beaten hydraulic oil backward, and double-piston turns to oil cylinder 22 left chambeies, when back swing tooth bar 23 moves right to maximum position, spacing collision block on the back swing tooth bar 23 collides the second travel switch K4, connect at the second travel switch K4, at this moment, the first electromagnetic valve L1 gets, the second electromagnetic valve L2, the 3rd electromagnetic valve L3, the 4th electromagnetic valve L4 and the 5th electromagnetic valve L5 outage, back double-piston turns to oil cylinder 22 locked, and promptly the trailing wheel 3 of vehicle is in transverse horizontal position and locked, and the oil circuit of all-hydraulic steering gear 24 and preceding double-piston turn to oil cylinder 16 to connect simultaneously, the operator can control turning to of two front-wheels by the steering dish like this, comes the travel direction of control vehicle.
When deflecting into as shown in Figure 6 the orientation as the near front wheel 1 and off front wheel 2, the track of the near front wheel 1, off front wheel 2 and trailing wheel 3 motions is exactly two circular arcs among Fig. 6, these two circular arcs are concentric circless, when operator's direction of operating dish, when making the continuous deflection of the corner of the near front wheel 1 and off front wheel 2, the center of circle of three wheel path of motions moves up and down on hanging down in these 3 equicrural triangles that constituted of the near front wheel 1 center, off front wheel 2 centers and trailing wheel 3 centers, and fork truck is turned to different turn radiuss.This process is exactly the direction control of lateral direction of car when travelling.
Claims (4)
1. the steering hardware of an engineering truck comprises front-wheel steering system that control the near front wheel (1) and off front wheel (2) turn to, controls the rear-axle steering system that trailing wheel (3) turns to, and it is characterized in that: described front-wheel steering system comprises
Can drive the left steering sprocket wheel (4) that the near front wheel (1) turns to;
Left side duplicate sprocket (5), the lower-left sprocket wheel (51) of left duplicate sprocket is connected with left steering sprocket wheel (4) by left front chain (6);
Coaxial mounted left side swing sprocket wheel (6) and left wobble gear (7), left side swing sprocket wheel (7) is connected with the upper left sprocket wheel (52) of left duplicate sprocket by left chain (8);
Can drive the right steering sprocket wheel (9) that off front wheel (2) turns to;
Right duplicate sprocket (10), the bottom right sprocket wheel (101) of right duplicate sprocket is connected with right steering sprocket wheel (9) by right front chain (11);
Coaxial mounted right swing sprocket wheel (12), right wobble gear (13) and preceding wobble gear (14), described right swing sprocket wheel (13) is connected with the upper right sprocket wheel (102) of right duplicate sprocket by right chain (15), and described right wobble gear (13) is meshing with each other with left wobble gear (7);
Horizontal preceding double-piston turns to oil cylinder (16), and this preceding double-piston turns between the two-piston of oil cylinder (16) and is provided with forward swing carry-over bar (17), this forward swing carry-over bar (17) with described before wobble gear (14) external toothing;
Described rear-axle steering system comprises
Turn to sprocket wheel (18) after driving that trailing wheel (3) turns to;
Coaxial mounted back swing sprocket wheel (19) and back wobble gear (20), described back swing sprocket wheel (20) by rear chain (21) with after turn to sprocket wheel (18) to be connected;
Horizontal back double-piston turns to oil cylinder (22), and this back double-piston turns to and is provided with swing tooth bar (23) in back between the two-piston of oil cylinder (22), this back swing tooth bar (23) and described back wobble gear (20) engagement;
Double-piston turns to oil cylinder (16) to turn to oil cylinder (22) to link to each other with an all-hydraulic steering gear (24) by the hydraulic control system with logic control program with the back double-piston before described.
2. steering hardware according to claim 1, it is characterized in that: described hydraulic control system comprises first electromagnetic valve (L1), second electromagnetic valve (L2), the 3rd electromagnetic valve (L3) and the 4th electromagnetic valve (L4) that is installed on the valve plate, and described valve plate is provided with first delivery port (a), second delivery port (b), the 3rd delivery port (c) and the 4th delivery port (d) and first input port (e), second input port (f), the 3rd input port (g) and the 4th input port (h);
The A mouth of described first electromagnetic valve (L1) and the 3rd electromagnetic valve (L3) is connected and communicates with first delivery port (a), and first delivery port (a) turns to the left chamber of oil cylinder (16) to be communicated with by oil pipe and preceding double-piston; The B mouth of described first electromagnetic valve (L1) and the 3rd electromagnetic valve (L3) is connected and communicates with second delivery port (b), and second delivery port (b) turns to the right chamber of oil cylinder (16) to be communicated with by oil pipe and preceding double-piston;
The P mouth of described second electromagnetic valve (L2) and the 4th electromagnetic valve (L4) is connected and communicates with the 3rd delivery port (c), and the 3rd delivery port (c) turns to the left chamber of oil cylinder (22) to be communicated with by oil pipe with the back double-piston; The T mouth of described second electromagnetic valve (L2) and the 4th electromagnetic valve (L4) is connected and communicates with the 4th delivery port (d), and the 4th delivery port (d) turns to the right chamber of oil cylinder (22) to be communicated with by oil pipe with the back double-piston;
The A mouth of the T mouth of described first electromagnetic valve (L1) and second electromagnetic valve (L2) is connected and communicates with first input port (e), the B mouth of the P mouth of described first electromagnetic valve (L1) and second electromagnetic valve (L2) is connected and communicates with second input port (f), described first input port (e) is connected by the A mouth of oil pipe with all-hydraulic steering gear (24), and described second input port (f) is connected by the B mouth of oil pipe with all-hydraulic steering gear (24); The A mouth of the T mouth of described the 3rd electromagnetic valve (L3) and the 4th electromagnetic valve (L4) is connected and communicates with the 3rd input port (g), and the B mouth of the P mouth of described the 3rd electromagnetic valve (L3) and the 4th electromagnetic valve (L4) is connected and communicates with the 4th input port (h);
The 5th electromagnetic valve (L5), the A mouth of the 5th electromagnetic valve (L5) is connected with described the 3rd input port (g) by oil pipe, the B mouth of the 5th electromagnetic valve (L5) is connected with described the 4th input port (h) by oil pipe, the P mouth of the 5th electromagnetic valve (L5) is connected with oil pump (26), the T mouth of the 5th electromagnetic valve (L5) is connected by the P mouth of oil pipe with all-hydraulic steering gear (24), and the T mouth of all-hydraulic steering gear (24) then is communicated with the tank drainback mouth by oil pipe;
The function switch dual gear switch of forming by first switch (K1) and second switch (K2), under first switch (K1) on-state, the 3rd electromagnetic valve (L3) and the 5th electromagnetic valve (L5), first electromagnetic valve (L1), second electromagnetic valve (L2) and the 4th electromagnetic valve (L4) outage, under second switch (K2) on-state, the 4th electromagnetic valve (L4) and the 5th electromagnetic valve (L5) get electric, first electromagnetic valve (L1), second electromagnetic valve (L2) and the 3rd electromagnetic valve (L3) outage;
In order to detect first travel switch (K3) of forward swing carry-over bar (17) when moving to maximum travel position, under the state that first travel switch (K3) is connected, second electromagnetic valve (L2) gets electric, first electromagnetic valve (L1), the 3rd electromagnetic valve (L3), the 4th electromagnetic valve (L4) and the 5th electromagnetic valve (L5) outage;
In order to detect second travel switch (K4) of back swing tooth bar (23) when moving to maximum travel position, under the state that second travel switch (K4) is connected, first electromagnetic valve (L1) gets electric, second electromagnetic valve (L2), the 3rd electromagnetic valve (L3), the 4th electromagnetic valve (L4) and the 5th electromagnetic valve (L5) outage.
3. steering hardware according to claim 2, it is characterized in that: described first electromagnetic valve (L1), second electromagnetic valve (L2), the 3rd electromagnetic valve (L3) and the 4th electromagnetic valve (L4) are two-position four-way solenoid valve, and described the 5th electromagnetic valve (L5) is a three position four-way electromagnetic valve.
4. steering hardware according to claim 2 is characterized in that: the P mouth of described the 5th electromagnetic valve (L5) is stablized flow divider valve (25) by single channel and is connected with oil pump (26).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010160372 CN102233898B (en) | 2010-04-27 | 2010-04-27 | Steering device for engineering vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010160372 CN102233898B (en) | 2010-04-27 | 2010-04-27 | Steering device for engineering vehicle |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102233898A true CN102233898A (en) | 2011-11-09 |
| CN102233898B CN102233898B (en) | 2012-12-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201010160372 Expired - Fee Related CN102233898B (en) | 2010-04-27 | 2010-04-27 | Steering device for engineering vehicle |
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| Country | Link |
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| CN (1) | CN102233898B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110255440A (en) * | 2019-05-14 | 2019-09-20 | 盐城品迅智能科技服务有限公司 | A kind of intelligence is used for the fork truck equipment and its method for carrying of transporting container |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4504074A (en) * | 1983-06-08 | 1985-03-12 | Upright, Inc. | Steering system |
| WO1999012794A1 (en) * | 1997-09-08 | 1999-03-18 | Bauer Nilsen Magnus | A steering gear for pivoted wheels on a vehicle |
| CN2875909Y (en) * | 2006-01-24 | 2007-03-07 | 中国人民解放军总装备部军械技术研究所 | All direction turning round mechanism of motor driven industrial vehicle |
| CN201161550Y (en) * | 2008-02-03 | 2008-12-10 | 李清平 | Bidirectional-running liftable multi-service car for spraying farm insecticide on farmland |
| CN201753074U (en) * | 2010-04-27 | 2011-03-02 | 宁波如意股份有限公司 | Engineering vehicle steering device |
-
2010
- 2010-04-27 CN CN 201010160372 patent/CN102233898B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4504074A (en) * | 1983-06-08 | 1985-03-12 | Upright, Inc. | Steering system |
| WO1999012794A1 (en) * | 1997-09-08 | 1999-03-18 | Bauer Nilsen Magnus | A steering gear for pivoted wheels on a vehicle |
| CN2875909Y (en) * | 2006-01-24 | 2007-03-07 | 中国人民解放军总装备部军械技术研究所 | All direction turning round mechanism of motor driven industrial vehicle |
| CN201161550Y (en) * | 2008-02-03 | 2008-12-10 | 李清平 | Bidirectional-running liftable multi-service car for spraying farm insecticide on farmland |
| CN201753074U (en) * | 2010-04-27 | 2011-03-02 | 宁波如意股份有限公司 | Engineering vehicle steering device |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110255440A (en) * | 2019-05-14 | 2019-09-20 | 盐城品迅智能科技服务有限公司 | A kind of intelligence is used for the fork truck equipment and its method for carrying of transporting container |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102233898B (en) | 2012-12-19 |
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