CN103264725A - Safe steering system of heavy forklift - Google Patents
Safe steering system of heavy forklift Download PDFInfo
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- CN103264725A CN103264725A CN2013102010997A CN201310201099A CN103264725A CN 103264725 A CN103264725 A CN 103264725A CN 2013102010997 A CN2013102010997 A CN 2013102010997A CN 201310201099 A CN201310201099 A CN 201310201099A CN 103264725 A CN103264725 A CN 103264725A
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Abstract
The invention relates to a safe steering system of a heavy forklift. The system comprises a steering hydraulic cylinder, a steering gear, a main hydraulic oil supply mechanism and a hydraulic oil tank. The oil inlet of the steering gear is communicated with the main hydraulic oil supply mechanism. An auxiliary hydraulic oil supply mechanism comprises a motor and a gear pump, wherein the gear pump is driven by the motor, and the oil inlet of the gear pump is communicated with the hydraulic oil tank. A pressure switch, an energy accumulator, an auxiliary single-way valve and an overflow valve are sequentially connected to an oil pipe, among oil outlets of the gear pump of the oil inlet of the steering gear, in series. Because the auxiliary hydraulic oil supply mechanism is additionally arranged on the safe steering system of the heavy forklift, a spare oil supply mechanism of an emergency hydraulic oil source works after hydraulic steering is out of order. The safe steering system of the heavy forklift solves the problem of steering of the heavy forklift when a hydraulic system oil source completely loses efficiency. When the whole machine breaks down and accordingly the steering system can not work, the auxiliary hydraulic oil supply mechanism can drive the steering system to operate so as to conveniently drag the whole machine for maintenance.
Description
Technical field
The invention belongs to heavy fork truck technical field, be specifically related to the steering swivel system of heavy fork truck.
Background technology
Existing heavy fork-truck steering system adopts all hydraulic pressure steering-gear, the steeraxle postposition, what adopt is rear-axle steering, stable fluid is supplied with and has been guaranteed that complete machine turns to flexibly, actuating force is also less, and the load per axle of complete machine back steeraxle under light condition can increase, and can guarantee that also the steering hydraulic action of complete machine is finished smoothly.But this steering swivel system has deficiency in safety; heavy fork truck dead weight is bigger; when the hydraulic efficiency pressure system oil sources under entirely ineffective situation; it is engine shutdown; can not finish the action that car load turns to, dangerous property, especially when complete machine is fully loaded be on the ramp (going up a slope or descending) more dangerous; can not turn to when on the other hand, complete machine breaks down and be difficult to that car load is dragged repair plant and keep in repair.
Summary of the invention
For solve the hydraulic efficiency pressure system oil sources under entirely ineffective situation heavy fork truck turn to problem, by structural development, the invention provides a kind of safe steering swivel system of heavy fork truck.
The safe steering swivel system of heavy fork truck comprises and turns to oil cylinder, deflector and hydraulic reservoir, the oil inlet of deflector being communicated with main hydraulic pressure oil supply mechanism that described main hydraulic pressure oil supply mechanism comprises main check valve, main delivery valve, the main steering pump of turning to; Also comprise the auxiliary hydraulic pressure oil supply mechanism, the auxiliary hydraulic pressure oil supply mechanism comprises motor and gear type pump, the motor-driven gear pump, the oil inlet of gear type pump is being communicated with hydraulic reservoir, and the oil outlet of gear type pump is connecting the import of the main check valve of the oil inlet of deflector and main hydraulic pressure oil supply mechanism respectively by three-way pipe; Connecting successively on the oil pipe between the oil outlet of the gear type pump of the oil inlet of deflector pressure switch, energy storage, auxilliary check valve and by pass valve.
Described energy storage is bag type accumulator.
Described pressure switch is the diaphragm type pressure switch.
Useful technique effect of the present invention is: by setting up the auxiliary hydraulic pressure oil supply mechanism, guarantee that fluid-link steering has the oil supply mechanism of a standby urgent hydraulic oil source after malfunctioning; Solved the hydraulic efficiency pressure system oil sources under the entirely ineffective situation heavy fork truck turn to problem; When complete machine et out of order steering swivel system can not be worked, the auxiliary hydraulic pressure oil supply mechanism can realize driving the steering swivel system action, overhauled with convenient complete machine is dragged.
Description of drawings
Fig. 1 is structural representation of the present invention.
Sequence number among the last figure: hydraulic reservoir 1, motor 2, gear type pump 3, by pass valve 4
,Auxilliary check valve 5, bag type accumulator 6, turn to oil cylinder 7, deflector 8, main check valve 9, pressure switch 10, main delivery valve 11, the main steering pump 12 of turning to.
The specific embodiment
Below in conjunction with accompanying drawing, be further described by the present invention of embodiment.
Referring to Fig. 1, the safe steering swivel system of heavy fork truck comprises and turns to oil cylinder 7, deflector 8 and hydraulic reservoir 1, the oil inlet of deflector 8 is connecting main hydraulic pressure oil supply mechanism respectively by three-way pipe, and main hydraulic pressure oil supply mechanism comprises main check valve 9, main delivery valve 11, the main steering pump 12 of turning to.Main check valve 9 exit end link to each other with the P mouth of deflector 8, the arrival end of main check valve 9 turns to the B mouth of delivery valve 11 to link to each other with main, the master turns to the A mouth of delivery valve 11 to connect the outlet of main steering pump 12, the oil suction of main steering pump 12 connects hydraulic reservoir 1, the main C mouth that turns to delivery valve 11 by three-way pipe with directly connect hydraulic reservoir 1 after the T mouth of deflector 8 is connected.Also comprise auxilliary hydraulic pressure oil supply mechanism, auxilliary hydraulic pressure oil supply mechanism comprises motor 2 and gear type pump 3, motor 2 driving gear pump 3, the oil inlet of gear type pump 3 is being communicated with hydraulic reservoir 1, and the oil outlet of gear type pump 3 is connecting the import of the main check valve 9 of the oil inlet of deflector 8 and main hydraulic pressure oil supply mechanism respectively by three-way pipe.Connecting successively on the oil pipe between the oil outlet of the oil inlet of deflector 8 and gear type pump 3 pressure switch 10, energy storage 6, auxilliary check valve 5 and by pass valve 4; Wherein pressure switch 10 is the diaphragm type pressure switch, and energy storage 6 is bag type accumulator.
Principle of work is as follows:
When car load needs handling maneuver, main steering pump 12 is supplied with the main delivery valve 11 that turns to by the hydraulic oil of drawing in the hydraulic reservoir 1, give main check valve 9 by the main high-voltage oil liquid of delivery valve 11 that turns to from B confession oil, the high-voltage oil liquid of main check valve 9 of flowing through enters deflector 8 by the P mouth in the deflector 8 again, 8 li fluid of deflector enter by L mouth and R mouth and turn to oil cylinder 7, side-to-side movement by oil cylinder just can realize that car load turns to, and turns to the C mouth of delivery valve 11 to be back to hydraulic reservoir 1 by the main delivery valve 11 unnecessary high-voltage oil liquids that turn to by main simultaneously.
When the car load propulsion source entirely ineffective; it is engine shutdown; at this moment navigating mate is pressed operator's compartment planted agent racing to switch; make motor 2 must establish beginning work by cable; when motor 2 work; the hydraulic oil that driven gear pump 3 is drawn in the hydraulic reservoir 1; hydraulic oil is after gear type pump 3 pressurizations; supply with deflector 8 through auxilliary check valve 5; by pass valve 4 overflows part fluid; and the pressure that makes gear type pump 3 supply with steering swivel system maintains 17.5MPa all the time; pressure switch 10 is sent to pressure signal in the operator's compartment on the gauge panel in real time; bag type accumulator 6 mainly is to absorb pulsation and hydraulic efficiency impact, and storage liquid pressure energy, the capacity of bag type accumulator 6 are 5.5L; main check valve 9 is to guarantee that high-voltage oil liquid that gear type pump 3 comes out is without the working connection pressure release; the high-voltage oil liquid of supply deflector 8 is supplied with respectively by L mouth and R mouth and is turned to oil cylinder 7, to realize the oil cylinder side-to-side movement, drives the pontic left and right sides, back wheel flutter and realizes safe and reliable handling maneuver.
Claims (3)
1. the safe steering swivel system of heavy fork truck, comprise and turn to oil cylinder, deflector and hydraulic reservoir, the oil inlet of deflector is being communicated with main hydraulic pressure oil supply mechanism, described main hydraulic pressure oil supply mechanism comprises main check valve, main delivery valve, the main steering pump of turning to, it is characterized in that: also comprise the auxiliary hydraulic pressure oil supply mechanism, the auxiliary hydraulic pressure oil supply mechanism comprises motor and gear type pump, the motor-driven gear pump, the oil inlet of gear type pump is being communicated with hydraulic reservoir, and the oil outlet of gear type pump is connecting the import of the main check valve of the oil inlet of deflector and main hydraulic pressure oil supply mechanism respectively by three-way pipe; Connecting successively on the oil pipe between the oil outlet of the gear type pump of the oil inlet of deflector pressure switch, energy storage, auxilliary check valve and by pass valve.
2. according to the safe steering swivel system of the described heavy fork truck of claim 1, it is characterized in that: described energy storage is bag type accumulator.
3. according to the safe steering swivel system of the described heavy fork truck of claim 1, it is characterized in that: described pressure switch is the diaphragm type pressure switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013102010997A CN103264725A (en) | 2013-05-28 | 2013-05-28 | Safe steering system of heavy forklift |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013102010997A CN103264725A (en) | 2013-05-28 | 2013-05-28 | Safe steering system of heavy forklift |
Publications (1)
| Publication Number | Publication Date |
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| CN103264725A true CN103264725A (en) | 2013-08-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013102010997A Pending CN103264725A (en) | 2013-05-28 | 2013-05-28 | Safe steering system of heavy forklift |
Country Status (1)
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| CN (1) | CN103264725A (en) |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104129428A (en) * | 2014-07-23 | 2014-11-05 | 徐州重型机械有限公司 | Emergency steering control system and method |
| CN104742964A (en) * | 2013-12-26 | 2015-07-01 | 湖北万山宏业汽车零部件有限公司 | Emergent steering system for engineering machinery |
| CN104924891A (en) * | 2015-07-10 | 2015-09-23 | 北京航天发射技术研究所 | Power oil source applied to hydraulically driven vehicle |
| CN105752152A (en) * | 2016-05-17 | 2016-07-13 | 山东汇川汽车部件有限公司 | Electric hydraulic power steering system for automobile |
| CN107228097A (en) * | 2017-07-06 | 2017-10-03 | 中铁工程装备集团有限公司 | A kind of closed booster station of nonstatic and its control method |
| CN107264499A (en) * | 2017-06-30 | 2017-10-20 | 徐州徐工矿山机械有限公司 | A kind of quarry tipper hydraulic auxiliary brake system and its control method |
| CN107472358A (en) * | 2017-08-18 | 2017-12-15 | 龙工(上海)机械制造有限公司 | Wheel loader is met an urgent need steering hydraulic system |
| CN107985397A (en) * | 2017-12-27 | 2018-05-04 | 潍柴动力股份有限公司 | A kind of emergency vehicles steering, new-energy automobile and forward method |
| CN108995707A (en) * | 2018-08-29 | 2018-12-14 | 中国重汽集团柳州运力科迪亚克机械有限责任公司 | Snow sweeper emergency hydraulic steering |
| CN110626422A (en) * | 2019-10-10 | 2019-12-31 | 郑州宇通重工有限公司 | New forms of energy electricelectric sanitation car power-assisted steering emergency compensation control system |
| CN112896306A (en) * | 2021-03-26 | 2021-06-04 | 广西柳工机械股份有限公司 | Steering hydraulic system and loader |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| DE19918225A1 (en) * | 1999-04-22 | 2000-11-02 | Daimler Chrysler Ag | Wheel angle setting device has second parallel double-action piston-cylinder unit with two single-action units working in opposition with drive connections to first unit, displacement device |
| CN1242319A (en) * | 1999-06-11 | 2000-01-26 | 林熊熊 | Semi-trailer direction changing servo system controlled by crank guide rod mechanism |
| US20050205337A1 (en) * | 2004-02-27 | 2005-09-22 | Sauer-Danfoss Aps | Hydraulic steering |
| CN101489853A (en) * | 2006-12-21 | 2009-07-22 | 日立建机株式会社 | Steering system for working vehicle |
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| CN201849525U (en) * | 2010-10-15 | 2011-06-01 | 北京京城重工机械有限责任公司 | Emergency steering system of vehicle |
| CN201882142U (en) * | 2010-12-15 | 2011-06-29 | 徐州重型机械有限公司 | Crane truck and steering control device thereof |
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Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104742964A (en) * | 2013-12-26 | 2015-07-01 | 湖北万山宏业汽车零部件有限公司 | Emergent steering system for engineering machinery |
| CN104129428A (en) * | 2014-07-23 | 2014-11-05 | 徐州重型机械有限公司 | Emergency steering control system and method |
| CN104129428B (en) * | 2014-07-23 | 2017-05-03 | 徐州重型机械有限公司 | Emergency steering control system and method |
| CN104924891A (en) * | 2015-07-10 | 2015-09-23 | 北京航天发射技术研究所 | Power oil source applied to hydraulically driven vehicle |
| CN105752152A (en) * | 2016-05-17 | 2016-07-13 | 山东汇川汽车部件有限公司 | Electric hydraulic power steering system for automobile |
| CN107264499A (en) * | 2017-06-30 | 2017-10-20 | 徐州徐工矿山机械有限公司 | A kind of quarry tipper hydraulic auxiliary brake system and its control method |
| CN107264499B (en) * | 2017-06-30 | 2023-09-12 | 徐州徐工矿业机械有限公司 | Hydraulic auxiliary braking system of mining dump truck and control method thereof |
| CN107228097A (en) * | 2017-07-06 | 2017-10-03 | 中铁工程装备集团有限公司 | A kind of closed booster station of nonstatic and its control method |
| CN107472358A (en) * | 2017-08-18 | 2017-12-15 | 龙工(上海)机械制造有限公司 | Wheel loader is met an urgent need steering hydraulic system |
| CN107472358B (en) * | 2017-08-18 | 2023-12-15 | 龙工(上海)机械制造有限公司 | Emergency steering hydraulic system of wheel loader |
| CN107985397A (en) * | 2017-12-27 | 2018-05-04 | 潍柴动力股份有限公司 | A kind of emergency vehicles steering, new-energy automobile and forward method |
| CN107985397B (en) * | 2017-12-27 | 2024-01-16 | 潍柴动力股份有限公司 | Emergency vehicle steering system, new energy automobile and steering method |
| CN108995707A (en) * | 2018-08-29 | 2018-12-14 | 中国重汽集团柳州运力科迪亚克机械有限责任公司 | Snow sweeper emergency hydraulic steering |
| CN110626422A (en) * | 2019-10-10 | 2019-12-31 | 郑州宇通重工有限公司 | New forms of energy electricelectric sanitation car power-assisted steering emergency compensation control system |
| CN112896306A (en) * | 2021-03-26 | 2021-06-04 | 广西柳工机械股份有限公司 | Steering hydraulic system and loader |
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Application publication date: 20130828 |