CN112938831A - Front wheel synchronous rotation hydraulic system and forklift thereof - Google Patents
Front wheel synchronous rotation hydraulic system and forklift thereof Download PDFInfo
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- CN112938831A CN112938831A CN202110390851.1A CN202110390851A CN112938831A CN 112938831 A CN112938831 A CN 112938831A CN 202110390851 A CN202110390851 A CN 202110390851A CN 112938831 A CN112938831 A CN 112938831A
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- 230000001360 synchronised effect Effects 0.000 title claims abstract description 19
- 239000003921 oil Substances 0.000 abstract description 22
- 239000010720 hydraulic oil Substances 0.000 abstract description 2
- 238000009434 installation Methods 0.000 description 5
- 238000005299 abrasion Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012208 gear oil Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
- B66F9/00—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes
- B66F9/06—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes movable, with their loads, on wheels or the like, e.g. fork-lift trucks
- B66F9/075—Constructional features or details
- B66F9/07572—Propulsion arrangements
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/16—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors
- F15B11/22—Synchronisation of the movement of two or more servomotors
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- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Mechanical Engineering (AREA)
- Transportation (AREA)
- Fluid Mechanics (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Civil Engineering (AREA)
- Physics & Mathematics (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Forklifts And Lifting Vehicles (AREA)
Abstract
The invention discloses a front wheel synchronous rotation hydraulic system and a forklift thereof, and the front wheel synchronous rotation hydraulic system comprises a thin cylinder and a thick cylinder which drive a right front wheel and a left front wheel to synchronously rotate, wherein the fixed end of the thin cylinder is connected with a steering oil cylinder seat, the telescopic end of the thin cylinder is connected with a right front steering wheel frame, the right front steering wheel frame rotatably mounts the right front wheel on a front wheel frame mounting seat, a rod-free cavity of the thin cylinder is communicated with a rod cavity of the thick cylinder through a connecting hose, and the rod cavity of the thin cylinder and the rod-free cavity of the thick cylinder are both communicated with an oil conveying pipe of a steering gear box. The invention realizes that the front wheels on two sides are synchronously driven to rotate when hydraulic oil of the steering engine enters the corresponding oil cylinders by serially connecting the thick cylinder and the thin cylinder, and simultaneously, the steering of the front wheels on two sides is not only synchronous, but also synchronous in rotation angle by forming a certain functional relationship between the position relationship of the hinge point of the right wheel frame connected with the oil cylinders and the cylinder diameter ratio of the oil cylinders with thick cylinder diameter and thin cylinder diameter.
Description
Technical Field
The invention relates to the technical field of forklift steering hydraulic systems, in particular to a front wheel synchronous rotation hydraulic system and a forklift thereof.
Background
Present commodity circulation trade has risen, the land price is more and more expensive simultaneously, the utilization ratio requirement to the warehouse is higher and higher, especially to the stack of longer material in the warehouse, with ordinary fork truck, turning radius is great, be unfavorable for improving the utilization ratio in warehouse, consequently, multidirectional narrow tunnel fork truck just can solve the stack problem of longer material in the narrow tunnel, but multidirectional narrow tunnel fork truck when the side direction is gone, what adopt is that the front wheel package angle turns to, that is to say, two hydraulic component of direction machine will simultaneous control, the synchronism that turns to the front wheel just requires very much like this, if control is not good, will bring the front wheel serious in the wearing and tearing of short time, the front wheel change frequency is higher, the maintenance cost is high.
Disclosure of Invention
The invention aims to provide a front wheel synchronous rotation hydraulic system and a forklift thereof, so as to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme:
the utility model provides a front wheel synchronous rotation hydraulic system, is including the thin jar and the thick jar of the synchronous pivoted of drive right front wheel and left front wheel, thin jar stiff end is connected and is turned to the hydro-cylinder seat, and right front steering wheel carrier is connected to its flexible end, right front steering wheel carrier is with the rotatable installation of right front wheel on the front wheel carrier mount pad, thick jar stiff end is connected and is turned to the hydro-cylinder seat, and left front steering wheel carrier is connected to its flexible end, left front steering wheel carrier is with the rotatable installation of left front wheel on the front wheel carrier mount pad, thin jar no pole chamber has pole chamber intercommunication through coupling hose and thick jar, thin jar has pole chamber and thick jar no pole chamber all with the defeated oil pipe intercommunication of steering wheel.
Preferably, the ratio of the annular area A1 formed by the thick cylinder to the cylinder diameter area A2 of the thin cylinder is inversely proportional to the ratio of the pivoting diameter D of the left front steering wheel frame pivot point to the pivoting diameter D of the right front steering wheel frame pivot point, namely:
wherein:
d1 is the cylinder diameter of the thick cylinder, D1 is the cylinder diameter of the thick cylinder rod, and D2 is the cylinder diameter of the thin cylinder.
The application also provides a forklift, which comprises the front wheel synchronous rotation hydraulic system.
Compared with the prior art, the invention has the beneficial effects that:
according to the invention, the thick cylinder and the thin cylinder are communicated in series, so that when hydraulic oil of the steering machine enters the corresponding oil cylinders, the thick cylinder and the thin cylinder can keep synchronous telescopic motion, the front wheels on two sides are synchronously driven to rotate, and meanwhile, the position relation of a hinge point of the right wheel frame connected with the oil cylinders and the cylinder diameters of the oil cylinders with the thick cylinder diameter and the thin cylinder diameter are matched into a certain functional relation, so that the steering of the front wheels on two sides is synchronous, the same turning angle is realized, the sliding phenomenon of the front wheels during the side-running steering is effectively avoided, and the abrasion of the front wheels is reduced.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of the slim cylinder and right front wheel configuration of the present invention;
fig. 3 is a schematic view of the construction of the coarse cylinder and the left front wheel of the present invention.
In the figure: 1 thin cylinder, 2 steering oil cylinder base, 3 right front steering wheel frame, 4 front wheel frame mounting base, 5 right front wheel, 6 thick cylinder, 7 left front steering wheel frame, 8 left front wheel, 9 connecting hose, 10 steering gear oil delivery pipe.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-3, the present invention provides a technical solution:
a front wheel synchronous rotation hydraulic system comprises a thin cylinder 1 and a thick cylinder 6 which drive a right front wheel 5 and a left front wheel 8 to synchronously rotate, wherein the fixed end of the thin cylinder 1 is connected with a steering oil cylinder seat 2, the oil cylinder seat 2 is arranged on a vehicle body, the telescopic end of the thin cylinder 1 is connected with a right front steering wheel carrier 3, the right front steering wheel carrier 3 can rotatably install the right front wheel 5 on a front wheel carrier installation seat 4, the front wheel carrier installation seat 4 is fixedly arranged on the vehicle body, the fixed end of the thick cylinder 6 is connected with the steering oil cylinder seat 2, the telescopic end of the thick cylinder is connected with a left front steering wheel carrier 7, the left front steering wheel carrier 7 can rotatably install the left front wheel 8 on the front wheel carrier installation seat 4, the rodless cavity of the thin cylinder 1 is communicated with the rod cavity of the thick cylinder 6 through a connecting hose 9, and the rodless cavity of the thin cylinder 1 and the rodless cavity of;
the device can realize the steering synchronization of the right front steering wheel frame 3 and the left front steering wheel frame 7, mainly because a rodless cavity of the thin cylinder 1 is communicated with a rod cavity of the thick cylinder 6 through a connecting hose 9, when oil enters an opening of a steering gear A, a piston of the thick cylinder 6 is pushed, oil in the rod cavity of the thick cylinder 6 enters the rodless cavity of the thin cylinder 1 in series, the piston of the thin cylinder 1 is pushed to move, and oil returns from an opening B, the right front steering wheel frame 3 and the left front steering wheel frame 7 are driven to rotate, so that the synchronization purpose is achieved, but when the whole vehicle steers, tires cannot be worn, the angular speeds of the steering of the right front steering wheel frame 3 and the left front steering wheel frame 7 are required to be the same, if the angular speeds of the steering of the right front steering wheel frame 3 and the left front steering wheel frame 7 are required to be the same, the area in the rod cavity of the thick cylinder 6 is required to be the same as the area in the rodless cavity of the thin cylinder 1, so that the speed of the piston rod pushed out by, only in this way, the right front steering wheel frame 3 and the left front steering wheel frame 7 can rotate at the same angle at the same time, so that the front wheels cannot be abraded;
in fact, by the method, the matching requirement on the cylinder diameter and the rod diameter of the oil cylinder is high, the standard cylinder diameter and the rod diameter are not suitable for the matching, and the oil cylinder needs to be manufactured in a non-standard mode to meet the condition that the annular area of the piston of the thick cylinder 6 and the piston rod is the same as the area of the piston of the thin cylinder 1, so that the manufacturing difficulty of the oil cylinder is increased, and the cost of the oil cylinder is increased;
in order to solve the problems, in the technical scheme of the application, a relationship is established by the hinge point position of the front steering oil cylinder and the area ratio of the thick cylinder 6 and the thin cylinder 1 to meet the requirement that the right front steering wheel frame 3 and the left front steering wheel frame 7 can rotate at the same angle at the same time by adopting a standard cylinder diameter and a rod diameter oil cylinder;
the method specifically comprises the following steps: the ratio of the annular area A1 formed by the thick cylinder 6 to the cylinder diameter area A2 of the thin cylinder 1 is inversely proportional to the ratio of the hinge point revolving diameter D of the left front steering wheel frame 7 to the hinge point revolving diameter D of the right front steering wheel frame 3, namely:
wherein:
d1 is the cylinder diameter of the thick cylinder 6, D1 is the rod diameter of the thick cylinder 6, and D2 is the cylinder diameter of the thin cylinder 1; because the ratio of the annular area A1 to the cylinder diameter area A2 of the thin cylinder 1 is the ratio of the extension speeds of the piston rods of the thick cylinder 6 and the thin cylinder 1, but the acting points of the annular area A1 and the thin cylinder 1 are all the cylinder mounting points of the front steering wheel frames, when the ratio of the hinge point rotating diameter D of the left front steering wheel frame 7 to the hinge point rotating diameter D of the right front steering wheel frame 3 to the ratio of the annular area A1 to the cylinder diameter area A2 of the thin cylinder 1 is in inverse proportion, the steering speeds of the right front steering wheel frame 3 and the left front steering wheel frame 7 can be the same, and therefore abrasion can not be caused to the front wheels during steering.
The application also provides a forklift, which comprises the front wheel synchronous rotation hydraulic system.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (3)
1. The utility model provides a front wheel synchronous rotation hydraulic system, is including thin jar (1) and thick jar (6) of driving right front wheel (5) and left front wheel (8) synchronous rotation, thin jar (1) stiff end is connected and is turned to hydro-cylinder seat (2), and right front wheel frame (3) is connected to its flexible end, right front wheel frame (3) are rotatable with right front wheel (5) install on front wheel frame mount pad (4), thick jar (6) stiff end is connected and is turned to hydro-cylinder seat (2), and left front wheel frame (7) is connected to its flexible end, left front wheel frame (7) are rotatable with left front wheel (8) install on front wheel frame mount pad (4), its characterized in that: the rodless cavity of the thin cylinder (1) is communicated with the rod cavity of the thick cylinder (6) through a connecting hose (9), and the rod cavity of the thin cylinder (1) and the rodless cavity of the thick cylinder (6) are communicated with an oil conveying pipe (10) of a steering gear.
2. The front wheel synchronous rotation hydraulic system as claimed in claim 1, wherein: the ratio of the annular area A1 formed by the thick cylinder (6) to the cylinder diameter area A2 of the thin cylinder (1) is inversely proportional to the ratio of the pivoting diameter D of the hinge point of the left front steering wheel carrier (7) to the pivoting diameter D of the hinge point of the right front steering wheel carrier (3), namely:
wherein:
d1 is the cylinder diameter of the thick cylinder (6), D1 is the rod diameter of the thick cylinder (6), and D2 is the cylinder diameter of the thin cylinder (1).
3. A forklift, characterized in that: a front wheel synchronous rotation hydraulic system comprising any one of claims 1-2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110390851.1A CN112938831A (en) | 2021-04-12 | 2021-04-12 | Front wheel synchronous rotation hydraulic system and forklift thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110390851.1A CN112938831A (en) | 2021-04-12 | 2021-04-12 | Front wheel synchronous rotation hydraulic system and forklift thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112938831A true CN112938831A (en) | 2021-06-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110390851.1A Pending CN112938831A (en) | 2021-04-12 | 2021-04-12 | Front wheel synchronous rotation hydraulic system and forklift thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112938831A (en) |
Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004231111A (en) * | 2003-01-31 | 2004-08-19 | Mitsubishi Heavy Ind Ltd | Steering unit |
| CN101332831A (en) * | 2007-06-28 | 2008-12-31 | 季亚伟 | Fork-truck steering and balancing device |
| CN103967860A (en) * | 2014-04-21 | 2014-08-06 | 江苏柳工机械有限公司 | Hydraulic synchronous control system for non-rigid structures |
| CN104568258A (en) * | 2014-12-31 | 2015-04-29 | 徐工集团工程机械股份有限公司科技分公司 | Method for measuring static-state steering resisting moment of loading machine |
| CN105216860A (en) * | 2015-09-08 | 2016-01-06 | 江苏大学 | Semi-trailer train accurately turns to half active fluid bypass type control setup and the method with insensitivity |
| CN105253194A (en) * | 2015-09-30 | 2016-01-20 | 中国煤炭科工集团太原研究院有限公司 | Space connecting rod steering mechanism based on synchronous cylinder technology |
| CN205554313U (en) * | 2015-12-31 | 2016-09-07 | 湖北航天技术研究院特种车辆技术中心 | Multiaxis grouping vehicle turns to device |
| CN107585712A (en) * | 2017-08-28 | 2018-01-16 | 合肥搬易通科技发展有限公司 | A kind of multidirectional fork truck skidding cornerite turns to synchronization system |
| CN107879290A (en) * | 2017-12-20 | 2018-04-06 | 合肥搬易通科技发展有限公司 | The enlarger that a kind of multidirectional forklift front wheel turns to |
| CN109591886A (en) * | 2018-11-30 | 2019-04-09 | 三汽车起重机械有限公司 | Vehicle assist steering system and automatic driving vehicle |
| CN110803217A (en) * | 2019-10-25 | 2020-02-18 | 广州电力机车有限公司 | Hydraulic power steering system of dumper |
| CN111170222A (en) * | 2020-02-27 | 2020-05-19 | 苏州先锋物流装备科技有限公司 | Two-wheeled synchronous steering hydraulic system and forklift |
| CN111188799A (en) * | 2020-03-03 | 2020-05-22 | 合肥搬易通科技发展有限公司 | Series oil cylinder system applied to synchronous wheel and correction method thereof |
| CN214570493U (en) * | 2021-04-12 | 2021-11-02 | 合肥搬易通科技发展有限公司 | Front wheel synchronous rotation hydraulic system and forklift thereof |
-
2021
- 2021-04-12 CN CN202110390851.1A patent/CN112938831A/en active Pending
Patent Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004231111A (en) * | 2003-01-31 | 2004-08-19 | Mitsubishi Heavy Ind Ltd | Steering unit |
| CN101332831A (en) * | 2007-06-28 | 2008-12-31 | 季亚伟 | Fork-truck steering and balancing device |
| CN103967860A (en) * | 2014-04-21 | 2014-08-06 | 江苏柳工机械有限公司 | Hydraulic synchronous control system for non-rigid structures |
| CN104568258A (en) * | 2014-12-31 | 2015-04-29 | 徐工集团工程机械股份有限公司科技分公司 | Method for measuring static-state steering resisting moment of loading machine |
| CN105216860A (en) * | 2015-09-08 | 2016-01-06 | 江苏大学 | Semi-trailer train accurately turns to half active fluid bypass type control setup and the method with insensitivity |
| CN105253194A (en) * | 2015-09-30 | 2016-01-20 | 中国煤炭科工集团太原研究院有限公司 | Space connecting rod steering mechanism based on synchronous cylinder technology |
| CN205554313U (en) * | 2015-12-31 | 2016-09-07 | 湖北航天技术研究院特种车辆技术中心 | Multiaxis grouping vehicle turns to device |
| CN107585712A (en) * | 2017-08-28 | 2018-01-16 | 合肥搬易通科技发展有限公司 | A kind of multidirectional fork truck skidding cornerite turns to synchronization system |
| CN107879290A (en) * | 2017-12-20 | 2018-04-06 | 合肥搬易通科技发展有限公司 | The enlarger that a kind of multidirectional forklift front wheel turns to |
| CN109591886A (en) * | 2018-11-30 | 2019-04-09 | 三汽车起重机械有限公司 | Vehicle assist steering system and automatic driving vehicle |
| CN110803217A (en) * | 2019-10-25 | 2020-02-18 | 广州电力机车有限公司 | Hydraulic power steering system of dumper |
| CN111170222A (en) * | 2020-02-27 | 2020-05-19 | 苏州先锋物流装备科技有限公司 | Two-wheeled synchronous steering hydraulic system and forklift |
| CN111188799A (en) * | 2020-03-03 | 2020-05-22 | 合肥搬易通科技发展有限公司 | Series oil cylinder system applied to synchronous wheel and correction method thereof |
| CN214570493U (en) * | 2021-04-12 | 2021-11-02 | 合肥搬易通科技发展有限公司 | Front wheel synchronous rotation hydraulic system and forklift thereof |
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