CN203623770U - Synchronous steering control system of electric forklift - Google Patents
Synchronous steering control system of electric forklift Download PDFInfo
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- CN203623770U CN203623770U CN201320805607.8U CN201320805607U CN203623770U CN 203623770 U CN203623770 U CN 203623770U CN 201320805607 U CN201320805607 U CN 201320805607U CN 203623770 U CN203623770 U CN 203623770U
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- steering
- oil
- controller
- control system
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- Steering Control In Accordance With Driving Conditions (AREA)
Abstract
The utility model provides a synchronous steering control system of an electric forklift. The synchronous steering control system comprises a controller of the electric forklift and an electric forklift steering hydraulic oil way, wherein the steering hydraulic oil way is formed by a gear oil pump, a steering gear and a steering oil cylinder; an oil outlet port of the gear oil pump is connected with a magnetic exchange valve; an oil outlet port of the magnetic exchange valve is connected with an oil inlet port of a shuttle valve; two oil outlet ports of the shuttle valve are respectively connected with two oil cavities of the steering oil cylinder; a signal input end of the magnetic exchange valve is in a connection with a signal output end of the controller; and a signal input end of the controller is respectively arranged on a first angle sensor and a second angle sensor of a forklift steering axle master pin and a steering gear rotary main shaft for signal connection. Synchronous steering between a steering gear and a steering wheel is achieved via supplementation of hydraulic oil to the steering oil cylinder, so a direction sense of a driver during steering is improved, steering gear overweighting or floating is prevented and a safer complete automobile is provided.
Description
Technical field
The utility model relates to fork truck technical field, is specifically related to the synchronous steering control system of electri forklift.
Background technology
At present, domestic electri forklift generally adopts all-hydraulic servo-steering, generally to trigger Oil pump electrical machinery by accelerator signal (or speed-slackening signal), high pressure oil is squeezed into deflector, then increase the direction of transfer that steering handwheel passes to the power of steering gear and changes power, drive wheel flutter to turn to, and make driver operation light.Have during this period the generation of interior leakage phenomenon due to deflector, oil pump or oil cylinder, thereby cause the corner of bearing circle and wheel flutter can not form certain corresponding relation, bearing circle turns to and can not synchronize with wheel flutter, and driver's sense of direction is affected.And adopted in recent years the deflector (FHPS hydro-steering) of integrated electro-hydraulic control with the internationally renowned brand fork truck headed by Toyota, and realize above-mentioned functions, can be satisfied with the fork lift truck applications of all propulsions source such as electronic, internal combustion car.But this deflector collection electrical control, Proportional Valve-controlled are formed on the components and parts of one, and price is very expensive, and more common deflector is expensive more than 10 times, be difficult to go to be applied in mid and low-end products.
Utility model content
The utility model is in order to solve the problems of the technologies described above, utilize in electri forklift port and improved steering hydraulic oil circuit with traction, the corresponding controller of oil pump, provide electri forklift synchronous steering control system, sense of direction when raising driver turns to, prevent that bearing circle is overweight or unstable, makes car load safer.
The technical solution of the utility model is: the synchronous steering control system of electri forklift, comprise controller and the fork-truck steering hydraulic circuit of electri forklift, described steering hydraulic oil circuit comprises geared oil pump, deflector, steering cylinder, the oil outlet end of described geared oil pump is connected with solenoid directional control valve, the oil outlet end of described solenoid directional control valve is connected with the oil inlet of shuttle valve, and two oil outlets of shuttle valve are connected with two oil pockets of steering cylinder respectively; The signal input part of described solenoid directional control valve is connected with the signal output part of described controller, the signal input part of described controller be installed on respectively the first angular transducer, the second angular transducer on forklift steering bridge stub, deflector live spindle and carry out signal and be connected.
Further, described the first angular transducer, the second angular transducer are incremental rotary encoder.
Further, described controller comprises comparator and amplifier, the signal output part of described the first angular transducer, the second angular transducer is connected with the signal input part of comparator by amplifier, and the signal output part of comparator is connected with the signal input part of described solenoid directional control valve.
The utility model detects respectively the wheel flutter of electri forklift and the rotational angle of bearing circle by two incremental rotary encoders that are arranged on respectively on steeraxle stub and deflector live spindle, and the angle signal detecting is fed back to the controller that electri forklift is provided for oneself, amplify and send to comparator to compare this two angle signal through amplifier, be generally 0.95 when the ratio of this two angle signal is less than 1() time, comparator carries signal to solenoid directional control valve, open solenoid directional control valve and conducting oil circuit, by the hydraulic oil in geared oil pump to supplementing oil mass in shuttle valve guiding steering cylinder, the oil mass of losing because of interior leakage to make up deflector or steering cylinder, thereby guarantee that steering wheel angle becomes synchronizeing of certain relation to turn to steering wheel angle.And after oil mass in steering cylinder is enough, through comparator, two angle signals are compared, be generally 1.05 when its ratio is greater than 1(), the signal of exporting to solenoid directional control valve is OFF, closes additional oil circuit.
So the utility model has advantages of following aspect compared with prior art products:
1, the utility model is avoided because leaking and make can not synchronize and turn between bearing circle and wheel flutter in deflector or steering cylinder by supplement hydraulic oil to steering cylinder, thereby improve sense of direction when driver turns to, prevent that bearing circle is overweight or unstable, makes car load safer;
2, the utility model is simple in structure, utilizes in electri forklift the detection angles signal of processing two incremental rotary encoders with traction, the corresponding controller of oil pump to control the open and close of solenoid directional control valve.
3, the utility model newly added equipment is few, and cost is low, compared with the deflector of integrated synchronous turning function, has very strong price advantage.
4, the utility model adopts incremental rotary encoder as angular transducer, and it has good stability, precision high, and reduces the impact of vibration on its performance.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the utility model is described in further detail:
Fig. 1 is liquid principle schematic in the utility model;
Fig. 2 is schematic block circuit diagram in utility model;
In figure: 1-geared oil pump, 2-solenoid directional control valve, 3-shuttle valve, 4-steering cylinder, 5-deflector, 5-1 spool, 5-2 measure motor, 6-controller, 6-1 comparator, 6-2 amplifier, 7-the first incremental rotary encoder, 8-the second incremental rotary encoder.
The specific embodiment
As shown in Figure 1, 2, the synchronous steering control system of electri forklift, comprise controller 6 and the fork-truck steering hydraulic circuit of electri forklift, described steering hydraulic oil circuit comprises geared oil pump 1, deflector 5, steering cylinder 4, the oil outlet end of described geared oil pump 1 is connected with solenoid directional control valve 2, the oil outlet end of described solenoid directional control valve 2 is connected with the oil inlet of shuttle valve 3, and two oil outlets of shuttle valve 3 are connected with two oil pockets of steering cylinder 4 respectively; The signal input part of described solenoid directional control valve 2 is connected with the signal output part of controller 6, controller 6 comprises comparator 6-1 and amplifier 6-2, the signal output part that is installed on respectively the first incremental rotary encoder 7 on forklift steering bridge stub, deflector live spindle, the second incremental rotary encoder 8 is connected with the signal input part of comparator 6-1 by amplifier 6-2, the signal output part of comparator 6-1 is connected with the signal input part of solenoid directional control valve 2, drives the oil circuit open and close of solenoid directional control valve 2.
Set forth the working process of this control system as an example of electri forklift left-hand rotation example: in the time that bearing circle turns left, drive the spool 5-1 in deflector 5 to move to left, the oil groove of spool 5-1 and its valve pocket in-line are connected, the oil that now geared oil pump 1 is exported enters through the P of deflector 5 mouth, flow to measure motor 5-2 from valve pocket again, promote measure motor 5-2 internal rotor with respect to stator rotation, stator and rotor is fuel-displaced by enter the left chamber of steering cylinder 4 after valve pocket through hydraulic fluid port A mouth simultaneously, its cylinder piston rod is moved right, promote wheel flutter left-handed turning, realize the turnon left of fork truck.Simultaneously, be installed on respectively the first incremental rotary encoder 7 on forklift steering bridge stub, deflector live spindle, the rotational angle that the second incremental rotary encoder 8 detects respectively wheel flutter and bearing circle, and this two angle signal is inputed in controller 6 amplify, relatively, if its ratio is 0.95 o'clock, controller 6 is exported start signal, the oil circuit of solenoid directional control valve 2 is opened, the left chamber that the hydraulic oil that geared oil pump 1 is exported flows to steering cylinder 4 through shuttle valve 3 supplements oil mass, continues to promote wheel flutter left-handed turning.Make wheel flutter become certain relation with the corner of bearing circle, realize it and synchronously turn to.And when mending to a certain extent, the controller 6 relatively ratio of its two angle signal is 1.05 o'clock, issue solenoid directional control valve 2 danger signals, 2 of solenoid directional control valves cut out oil circuit, no longer repairing are carried out in the left chamber of steering cylinder 4.
Above embodiment is not limited only to protection domain of the present utility model, all modify based on basic thought of the present utility model or change all belong to protection domain of the present utility model.
Claims (3)
1. the synchronous steering control system of electri forklift, comprise controller and the fork-truck steering hydraulic circuit of electri forklift, described steering hydraulic oil circuit comprises geared oil pump, deflector, steering cylinder, it is characterized in that: the oil outlet end of described geared oil pump is connected with solenoid directional control valve, the oil outlet end of described solenoid directional control valve is connected with the oil inlet of shuttle valve, and two oil outlets of shuttle valve are connected with two oil pockets of steering cylinder respectively; The signal input part of described solenoid directional control valve is connected with the signal output part of described controller, the signal input part of described controller be installed on respectively the first angular transducer, the second angular transducer on forklift steering bridge stub, deflector live spindle and carry out signal and be connected.
2. the synchronous steering control system of electri forklift according to claim 1, is characterized in that: described the first angular transducer, the second angular transducer are incremental rotary encoder.
3. the synchronous steering control system of electri forklift according to claim 1, it is characterized in that: described controller comprises comparator and amplifier, the signal output part of described the first angular transducer, the second angular transducer is connected with the signal input part of comparator by amplifier, and the signal output part of comparator is connected with the signal input part of described solenoid directional control valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320805607.8U CN203623770U (en) | 2013-12-10 | 2013-12-10 | Synchronous steering control system of electric forklift |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320805607.8U CN203623770U (en) | 2013-12-10 | 2013-12-10 | Synchronous steering control system of electric forklift |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203623770U true CN203623770U (en) | 2014-06-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320805607.8U Expired - Fee Related CN203623770U (en) | 2013-12-10 | 2013-12-10 | Synchronous steering control system of electric forklift |
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| CN (1) | CN203623770U (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105605021A (en) * | 2014-11-14 | 2016-05-25 | 丹佛斯动力系统有限公司 | Valve group and inlet module of valve group |
| CN108016493A (en) * | 2017-11-29 | 2018-05-11 | 山东蓬翔汽车有限公司 | A kind of steering of wide dumper |
| CN108146497A (en) * | 2017-11-29 | 2018-06-12 | 安徽合力股份有限公司 | A kind of hydro-steering synchronous control system for fork truck |
| CN109484604A (en) * | 2018-12-21 | 2019-03-19 | 广西梧州运龙港船机械制造有限公司 | Marine hydraulic steering engine servo steering instrument |
| CN110167825A (en) * | 2017-08-11 | 2019-08-23 | 株式会社小松制作所 | Working truck |
| CN111362193A (en) * | 2020-03-18 | 2020-07-03 | 安徽合力股份有限公司 | Synchronous steering control circuit of electric forklift |
| CN112938830A (en) * | 2021-02-24 | 2021-06-11 | 安徽合力股份有限公司 | Control method of double-drive electric forklift |
-
2013
- 2013-12-10 CN CN201320805607.8U patent/CN203623770U/en not_active Expired - Fee Related
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9810329B2 (en) | 2014-11-14 | 2017-11-07 | Danfoss Power Solutions Aps | Valve group and inlet module of a valve group |
| CN105605021A (en) * | 2014-11-14 | 2016-05-25 | 丹佛斯动力系统有限公司 | Valve group and inlet module of valve group |
| CN110167825A (en) * | 2017-08-11 | 2019-08-23 | 株式会社小松制作所 | Working truck |
| US11492781B2 (en) | 2017-08-11 | 2022-11-08 | Komatsu Ltd. | Work vehicle |
| CN110167825B (en) * | 2017-08-11 | 2022-02-22 | 株式会社小松制作所 | Working vehicle |
| CN108146497A (en) * | 2017-11-29 | 2018-06-12 | 安徽合力股份有限公司 | A kind of hydro-steering synchronous control system for fork truck |
| CN108016493A (en) * | 2017-11-29 | 2018-05-11 | 山东蓬翔汽车有限公司 | A kind of steering of wide dumper |
| CN108146497B (en) * | 2017-11-29 | 2024-01-05 | 安徽合力股份有限公司 | Full-hydraulic steering synchronous control system for forklift |
| CN108016493B (en) * | 2017-11-29 | 2024-01-16 | 山东蓬翔汽车有限公司 | Steering system of wide dump truck |
| CN109484604A (en) * | 2018-12-21 | 2019-03-19 | 广西梧州运龙港船机械制造有限公司 | Marine hydraulic steering engine servo steering instrument |
| CN111362193A (en) * | 2020-03-18 | 2020-07-03 | 安徽合力股份有限公司 | Synchronous steering control circuit of electric forklift |
| CN111362193B (en) * | 2020-03-18 | 2024-05-03 | 安徽合力股份有限公司 | Synchronous steering control circuit of electric forklift |
| CN112938830A (en) * | 2021-02-24 | 2021-06-11 | 安徽合力股份有限公司 | Control method of double-drive electric forklift |
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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 |
Granted publication date: 20140604 Termination date: 20211210 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |