CN203450197U - Hydraulic steering system of tractor - Google Patents
Hydraulic steering system of tractor Download PDFInfo
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- CN203450197U CN203450197U CN201320293200.1U CN201320293200U CN203450197U CN 203450197 U CN203450197 U CN 203450197U CN 201320293200 U CN201320293200 U CN 201320293200U CN 203450197 U CN203450197 U CN 203450197U
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- steering
- valve
- hydraulic
- oil cylinder
- vehicle frame
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Abstract
The utility model provides a hydraulic steering system of a tractor. The hydraulic steering system comprises an oil suction filter, a hydraulic pump, a pressure filter, a power unit, an oil return filter, a first shuttle valve, a hydraulic oil tank, a one-way valve, a main overflow valve, a proportion magnetic exchange valve, a second shuttle valve, a control valve block, a hydraulic lock, a buffer overflow valve, a hydraulic steering gear, a front steering oil cylinder, a rear steering oil cylinder, an angle sensor, a vehicle frame, a gearbox, an engine, a cab and a steering wheel. In the system, the steering system is a load sensitive system; the hydraulic pump provides flow for the load all the time; a heat value of the system is small; a load sensitive steering gear of the steering system is only connected with the front wheel steering oil cylinder; a structure and a pipeline of the system are simple; the steering system has a servo function of steering angles of the rear wheel and the front wheel, so a problem of off-track of four wheels is eliminated; and flow and direction switch of the rear wheel steering oil cylinder are controlled by the proportion magnetic exchange valve with accurate control, fast and stable response.
Description
Technical field
The present invention relates to a kind of hydrostatic steering system, refer to especially a kind of tractor truck hydrostatic steering system.
Background technology
At present, the serious and degradation of energy of the existing Hydraulic System of Aircraft Towing Tractor in whole world heating, in the service life of reducing hydraulic efficiency pressure system, increases the technical deficiency of energy consumption, because letting out in steering cylinder, causes and turns to sideslip fault, causes working service with high costs.
Summary of the invention
The object of this invention is to provide a kind of tractor truck hydrostatic steering system, from following 2 principles, solve this defect: in order to overcome existing Hydraulic System of Aircraft Towing Tractor heating seriously and degradation of energy, reduce the service life of hydraulic efficiency pressure system, increase the technical deficiency of energy consumption, solve because letting out in steering cylinder simultaneously and cause and turn to sideslip fault, a kind of rear steering of ad hoc meter is taken turns the servo-actuated load-sensitive hydrostatic steering system of relative steering front wheel.
In order to achieve the above object, the invention provides following technical scheme:
A tractor truck hydrostatic steering system, comprising: oil absorption filter, Hydraulic Pump, pressure filter, power unit, return filter, the first shuttle valve, hydraulic reservoir, check valve, main by pass valve, ratio solenoid directional control valve, the second shuttle valve, control cock piece, hydraulic lock, buffer overflow valve, hydraulic steering gear, front steering oil cylinder, rear steering oil cylinder, angular transducer, vehicle frame, change speed gear box, driving engine, operator's compartment and steering handwheel.Oil absorption filter is connected with Hydraulic Pump; Hydraulic Pump is connected with pressure filter; Oil absorption filter is connected with power unit; Pressure filter is connected with check valve; Power unit is connected with check valve; Check valve is connected with main by pass valve; Main by pass valve is connected with return filter; Ratio solenoid directional control valve is connected with main by pass valve with check valve; The second shuttle valve is connected with 10 ratio solenoid directional control valves; The second shuttle valve is connected with hydraulic lock; Hydraulic lock is connected with buffer overflow valve, and buffer overflow valve is connected with rear steering oil cylinder, and rear steering oil cylinder is connected with angular transducer; The first shuttle valve is connected with the second shuttle valve; The first shuttle valve is connected with hydraulic steering gear; Hydraulic steering gear is connected with front steering oil cylinder; Front steering oil cylinder is connected with angular transducer; Oil absorption filter is located at the below, inside of hydraulic reservoir; Return filter is located at the inner upper of hydraulic reservoir.
Hydraulic steering gear is connected with steering handwheel and is located at steering handwheel below; Steering handwheel is located at the inner side of operator's compartment; Operator's compartment is located at vehicle frame the place ahead; The first shuttle valve is located at vehicle frame surface one side between hydraulic steering gear and control cock piece; Control cock piece is located at vehicle frame surface; Pressure filter is positioned at vehicle frame surface; Driving engine is connected with change speed gear box, and is located on vehicle frame; Forward and backward steering cylinder is connected with the vehicle bridge of tractor truck and is positioned at vehicle frame below; Hydraulic reservoir, power unit are located at the right-hand of vehicle frame; Hydraulic Pump is connected with change speed gear box; Angular transducer is located at a side of forward and backward steering cylinder.
In invention, this steering swivel system is load sensitive system, Hydraulic Pump provides load required flow all the time, and system cal val is little, and the load-sensitive deflector of this steering swivel system is only connected with front-wheel steering oil cylinder, structure and pipeline are simple, this steering swivel system possesses rear wheel steering angle and front-wheel steering angle lag function, can eliminate four-wheel deviation phenomenon, and the uninterrupted of rear-axle steering oil cylinder and direction switching are controlled by ratio solenoid directional control valve, control accurately, speed of response is fast and steady.
The invention has the beneficial effects as follows: system cal val is little, possesses energy-saving effect, structure and pipeline are simple, control accurately, and speed of response is fast and steady, can bring good economic benefit.
Accompanying drawing explanation
Fig. 1 is a kind of structural representation of tractor truck hydrostatic steering system.
Fig. 2 is a kind of structural system schematic diagram of tractor truck hydrostatic steering system.
The specific embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is further elaborated.
As Fig. 1 Fig. 2 and as shown in, a kind of tractor truck hydrostatic steering system comprises: oil absorption filter 1, Hydraulic Pump 2, pressure filter 3, power unit 4, return filter 5, hydraulic reservoir 6, the first shuttle valve 7, check valve 8, main by pass valve 9, ratio solenoid directional control valve 10, the second shuttle valve 11, control cock piece 12, hydraulic lock 13, buffer overflow valve 14, hydraulic steering gear 15, front steering oil cylinder 16, rear steering oil cylinder 17, angular transducer 18, vehicle frame 19, change speed gear box 20, driving engine 21, operator's compartment 22 and steering handwheel 23.Oil absorption filter 1 is connected with Hydraulic Pump 2; Hydraulic Pump 2 is connected with pressure filter 3; Oil absorption filter 1 is connected with power unit 4; Pressure filter 3 is connected with check valve 8; Power unit 4 is connected with check valve 8; Check valve 8 is connected with main by pass valve 9; Main by pass valve 9 is connected with return filter 6; Ratio solenoid directional control valve 10 is connected with main by pass valve 9 with check valve 8; The second shuttle valve 11 is connected with ratio solenoid directional control valve 10; Control cock piece 12 is connected with hydraulic lock 13; Hydraulic lock 13 is connected with buffer overflow valve 14, and buffer overflow valve 14 is connected with rear steering oil cylinder 17, and rear steering oil cylinder 17 is connected with angular transducer 18; The first shuttle valve 7 is connected with the second shuttle valve 11; The first shuttle valve 7 is connected with hydraulic steering gear 15; Hydraulic steering gear 15 is connected with front steering oil cylinder 16; Front steering oil cylinder 16 is connected with angular transducer 18; Oil absorption filter 1 is located at the below, inside of hydraulic reservoir 5; Return filter 6 is located at the inner upper of hydraulic reservoir 5.
Hydraulic steering gear 15 is connected with steering handwheel 23 and is located at steering handwheel 23 belows; Steering handwheel 23 is located at the inner side of operator's compartment 22; Operator's compartment 22 is located at vehicle frame 19 the place aheads; The first shuttle valve 7 is located at the surperficial side of vehicle frame 19 between hydraulic steering gear 15 and control cock piece 12; Control cock piece 12 is located at vehicle frame 19 surfaces; Pressure filter 3 is positioned at vehicle frame 19 surfaces; Driving engine 21 is connected with change speed gear box 20, and is located on vehicle frame 19; Front steering oil cylinder 16 is connected with the vehicle bridge of tractor truck with rear steering oil cylinder 17 and is positioned at vehicle frame 19 belows; Hydraulic reservoir 5, power unit 4 are located at the right-hand of vehicle frame 19; Hydraulic Pump 2 is connected with change speed gear box 20; Angular transducer 18 is located at a side of front steering oil cylinder 16 and rear steering oil cylinder 17.
The principle of work of above-mentioned a kind of tractor truck hydrostatic steering system is: this steering swivel system is load-sensitive steering swivel system, when steering handwheel 23 during without handling maneuver Hydraulic Pump 2 in low pressure, approach the armed state of zero flow, when steering handwheel 23 has handling maneuver, owing to adopting load-sensitive to guarantee that Hydraulic Pump 2 only provides load required flow all the time, be not subject to the impact of Hydraulic Pump 2 rotation speed change, the requirement of live load is depended in the variation of uninterrupted completely.The cal val that this system is compared common constant-voltage system reduces a lot, thereby possesses energy-saving effect.This steering swivel system provides three kinds to turn to pattern, i.e. front-wheel steering, and four-wheel steering, crab type turns to.When turning to pattern to be front-wheel steering, stir steering handwheel 23, Hydraulic Pump 2 provides flow to hydraulic steering gear 15, then to front steering oil cylinder 16.When turning to pattern to be four-wheel steering, whether PLC control program detects trailing wheel angle by the angular transducer 18 on front-rear axle consistent with nose wheel angle, if inconsistent, ratio solenoid directional control valve 10 obtains electric, Hydraulic Pump 2 provides flow to rear steering oil cylinder 17, when turning to pattern, is that crab type is when turn to, if trailing wheel angle and nose wheel angle are inconsistent, ratio solenoid directional control valve 10 must be electric, and Hydraulic Pump 2 provides flow to rear steering oil cylinder 17.When turning to pattern, be that four-wheel steering or crab type are when turn to, if occur, in steering cylinder, let out phenomenon, owing to there being the Real-Time Monitoring of angular transducer 18, by PLC control program control ratio solenoid directional control valve 10 dead electricity and flow aperture, thereby guarantee that trailing wheel angle is identical with nose wheel angle, can eliminate four-wheel deviation phenomenon thus.And when correcting trailing wheel angle, proportional reversing valve electromagnet current value is determined by misalignment angle, when deviation is large, large by the given current value of programming control, otherwise little, and while therefore correcting angle, flow is steadily unlikely to vehicle and occurs dancing.When Hydraulic Pump 2 cannot be worked, this system is provided with emergency power unit 4, provides propulsion source and operate emergent turning to when being in an emergency.
According to above-mentioned principle of work: in invention, this steering swivel system is load sensitive system, Hydraulic Pump provides load required flow all the time, system cal val is little, the load-sensitive deflector of this steering swivel system is only connected with front-wheel steering oil cylinder, structure and pipeline are simple, this steering swivel system possesses rear wheel steering angle and front-wheel steering angle lag function, can eliminate four-wheel deviation phenomenon, the uninterrupted of rear-axle steering oil cylinder and direction switching are controlled by ratio solenoid directional control valve, control accurately, speed of response is fast and steady.
The invention has the beneficial effects as follows: system cal val is little, possesses energy-saving effect, structure and pipeline are simple, control accurately, and speed of response is fast and steady, can bring good economic benefit.
Claims (5)
1. a tractor truck hydrostatic steering system, comprising: oil absorption filter, Hydraulic Pump, pressure filter, power unit, return filter, the first shuttle valve, hydraulic reservoir, check valve, main by pass valve, ratio solenoid directional control valve, the second shuttle valve, control cock piece, hydraulic lock, buffer overflow valve, hydraulic steering gear, front steering oil cylinder, rear steering oil cylinder, angular transducer, vehicle frame, change speed gear box, driving engine, operator's compartment and steering handwheel; It is characterized in that: oil absorption filter is connected with Hydraulic Pump; Hydraulic Pump is connected with pressure filter; Oil absorption filter is connected with power unit; Pressure filter is connected with check valve; Power unit is connected with check valve; Check valve is connected with main by pass valve; Main by pass valve is connected with return filter; Ratio solenoid directional control valve is connected with main by pass valve with check valve; The second shuttle valve is connected with ratio solenoid directional control valve; The second shuttle valve is connected with hydraulic lock; Hydraulic lock is connected with buffer overflow valve, and buffer overflow valve is connected with rear steering oil cylinder, and rear steering oil cylinder is connected with angular transducer; The first shuttle valve is connected with the second shuttle valve; The first shuttle valve is connected with hydraulic steering gear; Hydraulic steering gear is connected with front steering oil cylinder; Front steering oil cylinder is connected with angular transducer; Oil absorption filter is located at the below, inside of hydraulic reservoir; Return filter is located at the inner upper of hydraulic reservoir.
2. a kind of tractor truck hydrostatic steering system according to claim 1, is characterized in that hydraulic steering gear is connected with steering handwheel and is located at steering handwheel below; Steering handwheel is located at the inner side of operator's compartment; Operator's compartment is located at the place ahead of vehicle frame; The first shuttle valve is located at vehicle frame surface one side between hydraulic steering gear and control cock piece; Control cock piece is located at vehicle frame surface; Pressure filter is positioned at vehicle frame surface; Driving engine is connected with change speed gear box, and is located on vehicle frame; Forward and backward steering cylinder is connected with the vehicle bridge of tractor truck and is positioned at vehicle frame below; Hydraulic reservoir, power unit are located at the right-hand of vehicle frame; Hydraulic Pump is connected with change speed gear box; Angular transducer is located at a side of forward and backward steering cylinder.
3. a kind of tractor truck hydrostatic steering system according to claim 1, is characterized in that: the load-sensitive deflector of this steering swivel system is only connected with front-wheel steering oil cylinder.
4. a kind of tractor truck hydrostatic steering system according to claim 1, is characterized in that: this steering swivel system possesses rear wheel steering angle and front-wheel steering angle lag function.
5. a kind of tractor truck hydrostatic steering system according to claim 1, is characterized in that: the uninterrupted of rear-axle steering oil cylinder and direction switching are controlled by ratio solenoid directional control valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320293200.1U CN203450197U (en) | 2013-05-16 | 2013-05-16 | Hydraulic steering system of tractor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320293200.1U CN203450197U (en) | 2013-05-16 | 2013-05-16 | Hydraulic steering system of tractor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203450197U true CN203450197U (en) | 2014-02-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320293200.1U Expired - Fee Related CN203450197U (en) | 2013-05-16 | 2013-05-16 | Hydraulic steering system of tractor |
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| Country | Link |
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| CN (1) | CN203450197U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104309683A (en) * | 2014-09-22 | 2015-01-28 | 三一汽车起重机械有限公司 | Hydraulic steering system and wheel crane |
| CN105539576A (en) * | 2015-12-25 | 2016-05-04 | 湖北三江航天万山特种车辆有限公司 | Hydraulic steering system of semitrailer |
| CN107600174A (en) * | 2017-10-18 | 2018-01-19 | 深圳市招科智控港口科技有限公司 | Unmanned tractor fluid-link steering and brakes |
-
2013
- 2013-05-16 CN CN201320293200.1U patent/CN203450197U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104309683A (en) * | 2014-09-22 | 2015-01-28 | 三一汽车起重机械有限公司 | Hydraulic steering system and wheel crane |
| CN105539576A (en) * | 2015-12-25 | 2016-05-04 | 湖北三江航天万山特种车辆有限公司 | Hydraulic steering system of semitrailer |
| CN107600174A (en) * | 2017-10-18 | 2018-01-19 | 深圳市招科智控港口科技有限公司 | Unmanned tractor fluid-link steering and brakes |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140226 Termination date: 20160516 |