CN112938840B - Fork rotary mechanism hydraulic system and three-way forklift thereof - Google Patents
Fork rotary mechanism hydraulic system and three-way forklift thereof Download PDFInfo
- Publication number
- CN112938840B CN112938840B CN202110388460.6A CN202110388460A CN112938840B CN 112938840 B CN112938840 B CN 112938840B CN 202110388460 A CN202110388460 A CN 202110388460A CN 112938840 B CN112938840 B CN 112938840B
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- oil
- valve
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- fork
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- 230000007246 mechanism Effects 0.000 title claims abstract description 12
- 239000003921 oil Substances 0.000 claims description 88
- 239000010720 hydraulic oil Substances 0.000 claims description 9
- 238000007599 discharging Methods 0.000 claims 1
- 230000009471 action Effects 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000002828 fuel tank Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- 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
- B66F9/20—Means for actuating or controlling masts, platforms, or forks
- B66F9/22—Hydraulic devices or systems
-
- 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
- B66F9/12—Platforms; Forks; Other load supporting or gripping members
- B66F9/14—Platforms; Forks; Other load supporting or gripping members laterally movable, e.g. swingable, for slewing or transverse movements
- B66F9/147—Whole unit including fork support moves relative to mast
- B66F9/149—Whole unit including fork support rotates
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- Engineering & Computer Science (AREA)
- Transportation (AREA)
- Structural Engineering (AREA)
- Civil Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Forklifts And Lifting Vehicles (AREA)
Abstract
The invention discloses a fork rotating mechanism hydraulic system and a three-way forklift thereof, comprising a brake, a hydraulic motor and a hydraulic control system, wherein the brake is arranged on the hydraulic motor for driving a fork to rotate; the reversing valve is characterized in that the oil inlet end of the reversing valve is communicated with the gear pump, the oil outlet end of the reversing valve is communicated with the cartridge valve assembly through a pipeline, and the cartridge valve assembly is communicated with the brake and the hydraulic motor; wherein: the cartridge valve assembly includes a double acting balance valve and a shuttle valve in communication with each other. According to the invention, the brake in the normally closed state is arranged at the hydraulic motor end for driving the fork to rotate, and when the motor rotates under the action of the hydraulic system, the brake can be opened after the oil way through the shuttle valve is automatically switched no matter the forward and reverse rotation of the motor, so that the brake can effectively lock the hydraulic motor when the fork rotates to any position, and when the motor rotates, the brake is synchronously released, so that the risk of falling goods caused by the rotation of the motor due to the internal leakage of the motor and the valve is avoided.
Description
Technical Field
The invention relates to the technical field of industrial forklift equipment, in particular to a hydraulic system of a fork rotating mechanism and a three-way forklift thereof.
Background
The modern logistics industry develops rapidly, and the urbanization process develops rapidly, and the popular cities are earnest. The requirements on warehouse capacity are higher and higher, and the application of the three-way forklift greatly improves the warehouse capacity and reduces the land input cost. And at present, three-way fork trucks in the market, fork rotation mode are mostly hydraulic drive, and hydraulic drive mode adopts hydraulic motor drive more, and hydraulic motor drive has motor and valves to let out, leads to fork truck when carrying cargo the walking, leads to motor and valves to let out because of the impact that the goods rocked and produced, causes the motor to rotate to lead to the fork to rotate, can not keep the goods position, causes risks such as goods drop. The conventional solution adopts the mechanical locking mechanism which is externally added, but the mechanical locking mechanism has high cost, can only be locked when the fork rotates to the limit position, and can not be locked at any position of the fork, so that the working condition adaptability of the forklift is reduced; the other solution is to add a brake on the motor, and a pipeline and a control valve are additionally added from the vehicle body for controlling the brake to be opened and return oil, so that the oil way is complex and the cost is high.
Disclosure of Invention
The invention aims to provide a fork rotating mechanism hydraulic system and a three-way forklift thereof, so as to solve the problems in the background technology.
In order to achieve the above purpose, the present invention provides the following technical solutions:
A fork rotation mechanism hydraulic system comprising
A brake provided on a hydraulic motor for driving rotation of the fork;
The reversing valve is characterized in that the oil inlet end of the reversing valve is communicated with the gear pump, the oil outlet end of the reversing valve is communicated with the cartridge valve assembly through a pipeline, and the cartridge valve assembly is communicated with the brake and the hydraulic motor;
wherein: the cartridge valve assembly comprises a double-acting balance valve and a shuttle valve which are mutually communicated, oil outlets of the double-acting balance valve are respectively connected with two oil ports of the hydraulic motor, two oil inlets of the shuttle valve are respectively connected to oil outlets of the double-acting balance valve, and the oil outlets of the shuttle valve are communicated with a brake release oil port.
Preferably, the brake is communicated with the accumulator, the accumulator is communicated with an oil inlet of the double-acting balance valve, and a second one-way valve is arranged on a pipeline for communicating the accumulator with the double-acting balance valve.
Preferably, an overflow valve is arranged on a pipeline for communicating the gear pump with the reversing valve.
The application also provides a three-way forklift, which comprises the hydraulic system of the fork rotating mechanism.
Compared with the prior art, the invention has the beneficial effects that:
1. According to the invention, the brake in a normally closed state is arranged at the hydraulic motor end for driving the fork to rotate, and when the motor rotates under the action of the hydraulic system, no matter the motor is positively transmitted and reversely rotated, the brake can be opened after the oil way through the shuttle valve is automatically switched, so that the brake can effectively lock the hydraulic motor when the fork rotates to any position, and when the motor rotates, the brake is synchronously released, so that the risk of falling goods caused by rotation of the motor due to internal leakage of the motor and the valve is avoided;
2. According to the invention, the accumulator is arranged in the hydraulic system, the oil in the spring cavity of the brake can be discharged into the accumulator, extra oil is discharged into the brake to flow into the accumulator, and after the opening pressure of the one-way valve is exceeded, the oil flows back to the oil tank through the oil pipe for driving the motor to rotate, so that the additional oil pipe is not required to be added; meanwhile, the energy accumulator can provide additional hydraulic pressure to increase braking force;
3. According to the invention, through the double-acting balance valve in the hydraulic oil way, the risk of falling of goods caused by rotating stall of the fork due to overrun load generated by load gravity when the fork truck loads the goods on a slope can be avoided; and, the double acting balancing valve also has the function of protecting the motor and mechanical structure in the event of impact loads.
Drawings
FIG.1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a schematic view of the inner carriage assembly of the present invention;
FIG. 3 is a front view of the three-way forklift of the present invention;
Fig. 4 is a top view of the three-way forklift of the present invention.
In the figure: the hydraulic truck comprises a reversing valve 1, a first one-way valve 2, an overflow valve 3, a motor 4, a gear pump 5, a fuel tank 6, an oil absorption filter 7, an oil return filter 8, a first pipeline 9, a second pipeline 10, a double-acting balance valve 11, a shuttle valve 12, a brake piston cavity 13a, a brake 13b, a brake component 14, a hydraulic motor 15, a third pipeline 16, a fourth pipeline 17, an accumulator 18, a fifth pipeline 19, a second one-way valve 20, a inner carriage component 21, a bridge component 22, a cartridge valve component 23, a gear component 24, a rotating shaft 25, a fork carriage 26.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1-4, the present invention provides a technical solution:
The output shaft of the hydraulic motor 14 is provided with a pinion which can drive the gear assembly 23 to rotate, so as to drive the rotating shaft 24 with the big gear at the end part to rotate, the fork 26 is arranged on the fork frame 25, the fork frame 25 is arranged on the rotating shaft 24, the rotating shaft 24 rotates so as to drive the fork 26 to rotate, the tail shaft end of the hydraulic motor 14 is provided with a brake 13, a release oil port of the brake 13 is connected to the cartridge valve assembly 22 through a third pipeline 15, the cartridge valve assembly 22 comprises a double-acting balance valve 11 and a shuttle valve 12 which are mutually communicated, an oil drain port of a spring cavity of the brake 13 is connected to the accumulator 17 through a fourth pipeline 16, an oil port of the accumulator 17 is simultaneously connected to the cartridge valve assembly 22 through a fifth pipeline 18, the cartridge valve assembly 22 is arranged on two oil port end surfaces of the hydraulic motor 14, the two oil ports of the cartridge valve assembly 22 are respectively connected with oil ports of the hydraulic motor 14 in a plane sealing mode, and the two oil ports of the double-acting balance valve 11 are respectively connected to a hydraulic system assembly of a vehicle body through a first pipeline 9 and a second pipeline 10;
The motor 4 drives the gear pump 5 to rotate for pumping oil, an oil outlet of the gear pump 5 is connected to an oil inlet of the Y-shaped median reversing valve 1, and two oil outlets of the reversing valve 1 are respectively connected to an oil inlet of a cartridge valve assembly 22 in a fork 26 rotary hydraulic assembly through a first pipeline 9 and a second pipeline 10 which encircle a pulley on a forklift gantry;
When the reversing valve 1 is in the middle position, the oil pumped by the gear pump 5 is connected to the oil return filter 8 through the oil suction filter 7 and the oil return port of the reversing valve 1, and finally returns to the oil tank 6, so that the hydraulic system is unloaded;
When the reversing valve 1 is at the left position, hydraulic oil pumped by the gear pump 5 flows from the oil suction filter 7 and the first pipeline 9 to the cartridge valve assembly 22, pressure oil opens an oil return path at the left side of the double-acting balance valve 11 through a pilot oil path, the pressure oil pushes a core to move leftwards through an oil port at the right side of the shuttle valve 12, the pressure oil enters the shuttle valve 12, flows to the brake 13 through the pilot oil path of the shuttle valve 12 to release the oil port to open the brake 13, at the moment, the pressure oil flows into the hydraulic motor 14 through an oil path at the right side, the hydraulic oil discharged by the hydraulic motor 14 is pushed to rotate, and the hydraulic oil flows from the oil path at the left side through the balance valve 11, flows through the reversing valve 1 and the oil return filter 8 through the second pipeline 10 and finally returns to the oil tank 6;
When the reversing valve 1 is at the right position, hydraulic oil pumped by the gear pump 5 flows from the second pipeline 10 to the cartridge valve assembly 22, pressure oil opens an oil return path at the right side of the double-acting balance valve 11 through a pilot oil path, the pressure oil pushes a core to move rightwards through an oil port at the left side of the shuttle valve 12, the pressure oil enters the shuttle valve 12, the pressure oil flows into the brake 13 through the pilot oil path of the shuttle valve 12 to a release oil port of the brake 13 to open the brake 13, at the moment, the pressure oil flows into the hydraulic motor 14 through the oil path at the left side to push the hydraulic motor 14, and hydraulic oil discharged by the hydraulic motor 14 flows from the oil path at the right side through the double-acting balance valve 11, flows through the reversing valve 1 and the oil return filter 8 through the first pipeline 9 and finally returns to the oil tank 6.
When the brake 13 is opened, the piston cavity 13a of the brake 13 is compressed, oil in the spring cavity is pressed into the accumulator 17, meanwhile, if the piston of the brake 13 is internally leaked, hydraulic oil which enters the accumulator 17 more causes the pressure of the accumulator 17 to be increased, and when the pressure exceeds the pressure of the second one-way valve 19, the oil returns to the oil tank from the second one-way valve 19 connected to the corresponding oil return pipeline; when the reversing valve 1 stops supplying oil to the hydraulic motor 14, the balance valve 11 is turned off due to no pressure difference, at the moment, no pressure difference exists on two sides of the shuttle valve 12, the valve core returns to the middle, the pilot oil passage is not pressurized, the brake 13 spring pushes the brake braking component 13b to brake the hydraulic motor 14, at the moment, the oil in the spring cavity is connected with the accumulator 17, and the oil in the accumulator 17 increases partial pressure and increases braking force.
When the fork 26 rotates to a mechanical limit position, or the fork 26 is overloaded, the oil pumped by the gear pump 5 can overflow the oil return tank 6 through the overflow valve 3, so that the hydraulic system and the mechanical structure are protected, the overflow valve 3 plays a role in preventing the backflow of hydraulic oil through the gear pump, and a first one-way valve 2 is arranged on a pipeline between the overflow valve 3 and the reversing valve 1.
In the three-way forklift with the application, a hydraulic component of a forklift body is arranged on the forklift body, the hydraulic component is connected to a fork rotating hydraulic component arranged in a bridge frame part 21 through a first pipeline 9 and a second pipeline 10, the first pipeline 9 and the second pipeline 10 bypass a pulley arranged in a portal frame system, the bridge frame part is arranged on an inner sliding frame part 20 and can move left and right on the inner sliding frame part 20, a hydraulic motor 14 drives a gear to rotate so as to drive a rotating shaft 24 to rotate, a fork frame 25 arranged on the rotating shaft 24 rotates along with the rotation, thereby driving a fork 26 arranged on the fork frame 25 to rotate left and right, the bridge frame part 21 moves left and right on the inner sliding frame part 20, and the fork 26 can rotate around the rotating shaft 24 in a three-way manner so as to realize the three-way fork of the fork 26; meanwhile, after the fork 26 is used for forking goods, the fork truck can only walk after rotating to the left or right limit, and braking in the walking process is avoided, and because goods inertia drives the fork 26 to rotate rapidly, the goods fall down, and safety accidents are caused, so that reliable locking is required after the fork 26 rotates to any position.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein 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. A fork rotary mechanism hydraulic system, characterized in that: comprising
A brake (13) provided on a hydraulic motor (14) for driving rotation of the fork (26);
the reversing valve (1) is characterized in that the oil inlet end of the reversing valve is communicated with the gear pump (5), the oil outlet end of the reversing valve is communicated with the cartridge valve assembly (22) through a pipeline, and the cartridge valve assembly is communicated with the brake (13) and the hydraulic motor (14);
wherein: the cartridge valve assembly (22) comprises a double-acting balance valve (11) and a shuttle valve (12) which are communicated with each other, oil outlets of the double-acting balance valve (11) are respectively connected with two oil outlets of the hydraulic motor (14), two oil inlets of the shuttle valve (12) are respectively connected to the oil outlets of the double-acting balance valve (11), the oil outlet of the shuttle valve (12) is communicated with a release oil outlet of the brake (13), an oil discharging outlet of the brake (13) is communicated with an accumulator (17), the accumulator (17) is communicated with an oil inlet of the double-acting balance valve (11), a second one-way valve (19) is arranged on a pipeline communicated with the accumulator (17) and the double-acting balance valve (11), when the brake (13) is opened, a piston cavity (13 a) spring of the brake (13) is compressed, oil in the spring cavity is pressed into the accumulator (17), and meanwhile, if the piston of the brake (13) is internally discharged, the hydraulic oil in the accumulator (17) is caused to be increased in pressure, and the oil returns to the oil tank (19) from the corresponding pipeline (6) when the pressure exceeds the second one-way valve (19).
2. The fork rotation mechanism hydraulic system of claim 1, wherein: an overflow valve (3) is arranged on a pipeline, communicated with the reversing valve (1), of the gear pump (5).
3. A three-way forklift, characterized in that: a fork rotation mechanism hydraulic system comprising any one of claims 1-2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110388460.6A CN112938840B (en) | 2021-04-11 | 2021-04-11 | Fork rotary mechanism hydraulic system and three-way forklift thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110388460.6A CN112938840B (en) | 2021-04-11 | 2021-04-11 | Fork rotary mechanism hydraulic system and three-way forklift thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112938840A CN112938840A (en) | 2021-06-11 |
| CN112938840B true CN112938840B (en) | 2024-06-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110388460.6A Active CN112938840B (en) | 2021-04-11 | 2021-04-11 | Fork rotary mechanism hydraulic system and three-way forklift thereof |
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| Country | Link |
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| CN (1) | CN112938840B (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN214570512U (en) * | 2021-04-11 | 2021-11-02 | 合肥搬易通科技发展有限公司 | Fork rotary mechanism hydraulic system and three-way forklift thereof |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202220068U (en) * | 2011-09-26 | 2012-05-16 | 北京燕华工程建设有限公司 | Hoisting control oil circuit system of automobile crane |
| CN203879825U (en) * | 2014-04-29 | 2014-10-15 | 三一汽车制造有限公司 | Cantilever crane rotation hydraulic system and concrete conveying pump device |
| CN106678090B (en) * | 2017-01-10 | 2018-05-08 | 辽宁三三工业有限公司 | Novel segment assembling machine hydraulic gyration mechanism |
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- 2021-04-11 CN CN202110388460.6A patent/CN112938840B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN214570512U (en) * | 2021-04-11 | 2021-11-02 | 合肥搬易通科技发展有限公司 | Fork rotary mechanism hydraulic system and three-way forklift thereof |
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| Publication number | Publication date |
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| CN112938840A (en) | 2021-06-11 |
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