CN108622826A - Prevent the reach truck hydraulic system that door frame slides back and forth - Google Patents
Prevent the reach truck hydraulic system that door frame slides back and forth Download PDFInfo
- Publication number
- CN108622826A CN108622826A CN201810812859.0A CN201810812859A CN108622826A CN 108622826 A CN108622826 A CN 108622826A CN 201810812859 A CN201810812859 A CN 201810812859A CN 108622826 A CN108622826 A CN 108622826A
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- CN
- China
- Prior art keywords
- pipe
- valve
- reach
- oil
- hydraulic fluid
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
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- 239000012530 fluid Substances 0.000 claims abstract description 34
- 239000002828 fuel tank Substances 0.000 claims description 16
- 230000002457 bidirectional effect Effects 0.000 claims description 14
- 238000000034 method Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 238000005183 dynamical system Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000750 progressive effect Effects 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
- B66F9/20—Means for actuating or controlling masts, platforms, or forks
- B66F9/205—Arrangements for transmitting pneumatic, hydraulic or electric power to movable parts or devices
-
- 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
-
- 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
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/06—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with two or more servomotors
-
- 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
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
- F15B21/04—Special measures taken in connection with the properties of the fluid
- F15B21/041—Removal or measurement of solid or liquid contamination, e.g. filtering
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Structural Engineering (AREA)
- Transportation (AREA)
- General Engineering & Computer Science (AREA)
- Fluid Mechanics (AREA)
- Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Combustion & Propulsion (AREA)
- Civil Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Analytical Chemistry (AREA)
- Fluid-Pressure Circuits (AREA)
- Forklifts And Lifting Vehicles (AREA)
Abstract
The invention discloses a kind of reach truck hydraulic systems for preventing door frame from sliding back and forth, including：Fueller and reach oil cylinder, fueller are connect by lock valve with reach oil cylinder；When the first hydraulic fluid port oil inlet, the piston rod of reach oil cylinder moves forward；When the second hydraulic fluid port oil inlet, the piston rod of reach oil cylinder bounces back；Lock valve is connect by first pipe with the first hydraulic fluid port, lock valve is also connect by second pipe with the second hydraulic fluid port, first pipe is connected with second pipe by balanced valve, and balanced valve is used for the internal overflow when reach oil cylinder is overloaded, to balance the oil pressure between first pipe and second pipe.When reach oil cylinder generates instantaneous high pressure because of door frame inertia, the instantaneous high pressure can be balanced by balanced valve, therefore the problem of can avoid letting out in lock valve appearance, so that hydraulic system plays the role of used in better locking, avoiding door frame from sliding back and forth so as to play.
Description
Technical field
The present invention relates to reach truck technical fields, are pitched more particularly to a kind of shift-forward type for preventing door frame from sliding back and forth
Vehicle hydraulic system.
Background technology
The door frame of reach truck can be moved forward and backward with pallet fork along the track of branch inboard leg, carry out picking and placeing operation
When, door frame Forward is driven by dynamical system, and then drive pallet fork forward moving to fork or put down cargo；Loading cargo transfer
When, pallet fork band cargo is withdrawn, and makes center of gravity of goods in supporting surface, to ensure that the center of gravity of cargo is fallen in the supporting plane of vehicle,
Therefore there is preferable stability.
Current reach truck fill 6 meters or more high door frames or it is fully loaded with cargo when driving, door frame will appear because Forward oil
Cylinder can not locking and the phenomenon that slid back and forth along reach guide rail, therefore there is some potential safety problems
Therefore, how a kind of reach truck hydraulic system for preventing door frame from sliding back and forth is provided, is people in the art
Member is badly in need of the technical issues of solving.
Invention content
The object of the present invention is to provide a kind of reach truck hydraulic systems for preventing door frame from sliding back and forth, and can effectively solve
The problems such as certainly existing fork truck safety coefficient is low.
In order to solve the above technical problems, the present invention provides following technical solutions：
A kind of reach truck hydraulic system for preventing door frame from sliding back and forth, including：
Fueller and reach oil cylinder, the fueller are connect by lock valve with the reach oil cylinder；
When the first hydraulic fluid port oil inlet, the piston rod of the reach oil cylinder moves forward；When the second hydraulic fluid port oil inlet, institute
State the piston rod retraction of reach oil cylinder；
The lock valve is connect by first pipe with first hydraulic fluid port, and the lock valve also passes through second pipe and institute
The connection of the second hydraulic fluid port is stated, the first pipe is connected with the second pipe by balanced valve, and the balanced valve is used for when described
Internal overflow when reach oil cylinder is overloaded, to balance the oil pressure between the first pipe and the second pipe.
Preferably, the balanced valve is Bidirectional balanced valve, the connect with the first pipe in the Bidirectional balanced valve
First hydraulic fluid port oil inlet described in when one check valve is opened, while the oil circuit being connect with the second pipe in the Bidirectional balanced valve is led
It is logical, so that the second hydraulic fluid port oil return；When the second check valve being connect with the second pipe in the Bidirectional balanced valve is opened
The two hydraulic fluid ports oil inlet, while being connected with the oil circuit of first pipe connection in the Bidirectional balanced valve, so that described first
Hydraulic fluid port oil return.
Preferably, the fueller includes gear pump and the fuel tank that is connected with the gear pump.
Preferably, the gear pump is connect by Inlet oil filter with the fuel tank.
Preferably, the lock valve is three-position four-way valve, when positioned at the first side position, the first pipe and the fuel feeding
Device is connected to, and the second pipe is connected to the fuel tank；When positioned at the second side position, the second pipe is filled with the fuel feeding
Connection is set, the first pipe is connected to the fuel tank；When positioned at middle position, the reach oil cylinder is locked up.
Preferably, return oil filter is additionally provided in the fuel tank, the return oil filter is parallel with overflow valve.
Compared with prior art, above-mentioned technical proposal has the following advantages：
A kind of reach truck hydraulic system for preventing door frame from sliding back and forth provided by the present invention, including：Fueller
And reach oil cylinder, fueller are connect by lock valve with reach oil cylinder；When the first hydraulic fluid port oil inlet, the piston rod of reach oil cylinder
Forward；When the second hydraulic fluid port oil inlet, the piston rod of reach oil cylinder bounces back；Lock valve is connect by first pipe with the first hydraulic fluid port,
Lock valve is also connect by second pipe with the second hydraulic fluid port, and first pipe is connected with second pipe by balanced valve, and balanced valve is used
In the internal overflow when reach oil cylinder is overloaded, to balance the oil pressure between first pipe and second pipe, in addition in reach oil cylinder
When normal Forward or retraction work, balanced valve is additionally operable to realize oil inlet and oil return function, and oil inlet and oil return pipe are cut off in locking
Road.When reach oil cylinder generates instantaneous high pressure because of door frame inertia, which can be balanced by balanced valve, therefore can avoid lock
Only valve occur in the problem of letting out so that hydraulic system plays used in better locking, before playing and avoiding door frame
The effect slided afterwards.
Description of the drawings
It, below will be to embodiment or the prior art in order to illustrate more clearly of the present invention or technical solution in the prior art
Attached drawing needed in description is briefly described, it should be apparent that, the accompanying drawings in the following description is some of the present invention
Embodiment for those of ordinary skill in the art without creative efforts, can also be attached according to these
Figure obtains other attached drawings.
Fig. 1 is a kind of a kind of reach truck liquid for preventing door frame from sliding back and forth that specific implementation mode is provided of the present invention
The schematic diagram of pressure system.
Reference numeral is as follows：
1 is return oil filter, and 2 be Inlet oil filter, and 3 be gear pump, and 4 be multi-way valve, and 5 be reach oil cylinder, and 6 is oily to tilt
Cylinder, 7 be governor valve, and 8 be lifting cylinder, and 9 be hydraulic motor, and 10 be steering gear, and 11 be balanced valve.
Specific implementation mode
It is understandable in order to enable the above objects, features and advantages of the present invention to become apparent, below in conjunction with the accompanying drawings to this hair
Bright specific implementation mode is described in detail.
Detail is elaborated in the following description in order to fully understand the present invention.But the present invention can with it is a variety of not
Other manner described here is same as to implement, those skilled in the art can do class without violating the connotation of the present invention
Like popularization.Therefore the present invention is not limited by following public specific implementation mode.
Referring to FIG. 1, Fig. 1 for a kind of specific implementation mode of the present invention provided it is a kind of prevent door frame from sliding back and forth before
The schematic diagram of shifting formula forklift hydraulic system.
A kind of specific implementation mode of the present invention provides a kind of reach truck hydraulic pressure system for preventing door frame from sliding back and forth
System, including：Fueller and reach oil cylinder 5, fueller are connect by lock valve with reach oil cylinder 5；When the first hydraulic fluid port oil inlet
When, the piston rod Forward of reach oil cylinder 5, and then realize the Forward of door frame, at this time the second hydraulic fluid port oil return；When the second hydraulic fluid port oil inlet
When, the piston rod retraction of reach oil cylinder 5, and then realize the retraction of door frame, at this time the first hydraulic fluid port oil return；Lock valve passes through the first pipe
Road is connect with the first hydraulic fluid port, and lock valve is also connect by second pipe with the second hydraulic fluid port, and first pipe and second pipe pass through flat
The valve 11 that weighs connects, and balanced valve 11 is used for the internal overflow when reach oil cylinder 5 is overloaded, to balance between first pipe and second pipe
Oil pressure, in addition in the normally Forward or when retraction work of reach oil cylinder 5, balanced valve 11 is additionally operable to realize oil inlet and oil return function,
Oil inlet and oil return line are cut off in locking.
In the present embodiment, when reach oil cylinder 5 generates instantaneous high pressure because of door frame inertia, this can be balanced by balanced valve 11
Instantaneous high pressure, thus can avoid lock valve occur in the problem of letting out so that hydraulic system plays used in better locking, from
It and can play the role of that door frame is avoided to slide back and forth.
Specifically, balanced valve 11 is Bidirectional balanced valve 11, and first connect with first pipe in Bidirectional balanced valve 11 is unidirectional
First hydraulic fluid port oil inlet when valve is opened simultaneously bi-directionally is connected in balanced valve 11 with the oil circuit of second pipe connection, so that the second hydraulic fluid port
Oil return；Two hydraulic fluid port oil inlets when the second check valve for being connect with second pipe in Bidirectional balanced valve 11 is opened, simultaneously bi-directionally balanced valve
It is connected with the oil circuit of first pipe connection in 11, so that the first hydraulic fluid port oil return.In addition in 5 locking of reach oil cylinder, first pipe
With second pipe not oil inlet, when the cylinder barrel end of reach oil cylinder 5 is by instantaneous high pressure, the oil pressure in first pipe can be connected
One pipeline so that second pipe is connected, and then realizes first pipe and second by the overflow ducts inside Bidirectional balanced valve 11
The connection of pipeline, to ensure the balance of oil pressure in reach oil cylinder 5；When the tailpiece of the piston rod means instantaneous high pressure of reach oil cylinder 5,
It can similarly realize the connection of second pipe and first pipe.
Specifically, fueller includes gear pump 3 and the fuel tank that is connected with gear pump 3.In addition the mailbox is additionally operable to back
The fuel tank of oil uses, and wherein gear pump 3 is only preferred, and other power plants also can be selected and realize pump oil.
In order to ensure that the spatter property of oil inlet, gear pump 3 are connect by Inlet oil filter 2 with fuel tank.
Specifically, lock valve is three-position four-way valve, and when positioned at the first side position, first pipe is connected to fueller, the
Two pipelines are connected to fuel tank, to realize the Forward of reach oil cylinder 5；When positioned at the second side position, second pipe connects with fueller
Logical, first pipe is connected to fuel tank, to realize the retraction of reach oil cylinder 5；When positioned at middle position, reach oil cylinder 5 is locked up.
Further, return oil filter 1 is additionally provided in fuel tank, return oil filter 1 is parallel with overflow valve.Pass through oil return oil strain
Device 1 can realize the spatter property of oil return, being capable of normal oil return when can guarantee that return oil filter 1 is blocked additionally by overflow valve.Its
In in order to improve the service life of hydraulic system, an alarm set can be set, which connect with overflow valve, works as overflow valve
When action, triggering alarm set sends out alerting signal, to remind staff's return oil filter 1 to block, answers timely block clearing.
In addition hydraulic system provided by the invention further includes dump ram 6, lifting cylinder 8 and hydraulic motor 9, gear pump 3
It is connect with dump ram 6, lifting cylinder 8 and hydraulic motor 9 by multi-way valve 4, is set between lifting cylinder 8 and multi-way valve 4 respectively
There is governor valve 7, steering gear 10 is equipped between hydraulic motor 9 and the multi-way valve 4.
It should also be noted that, herein, relational terms such as first and second and the like are used merely to one
Entity or operation are distinguished with another entity or operation, without necessarily requiring or implying between these entities or operation
There are any actual relationship or orders.Moreover, the terms "include", "comprise" or its any other variant are intended to contain
Lid non-exclusive inclusion, so that the process, method, article or equipment including a series of elements is not only wanted including those
Element, but also include other elements that are not explicitly listed, or further include for this process, method, article or equipment
Intrinsic element.In the absence of more restrictions, the element limited by sentence "including a ...", it is not excluded that
There is also other identical elements in process, method, article or equipment including the element.
Each embodiment is described by the way of progressive in this specification, the highlights of each of the examples are with other
The difference of embodiment, just to refer each other for identical similar portion between each embodiment.
The foregoing description of the disclosed embodiments enables those skilled in the art to implement or use the present invention.
Various modifications to these embodiments will be apparent to those skilled in the art, as defined herein
General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, of the invention
It is not intended to be limited to the embodiments shown herein, and is to fit to and the principles and novel features disclosed herein phase one
The widest range caused.
Claims (6)
1. a kind of reach truck hydraulic system for preventing door frame from sliding back and forth, which is characterized in that including：
Fueller and reach oil cylinder, the fueller are connect by lock valve with the reach oil cylinder；
When the first hydraulic fluid port oil inlet, the piston rod of the reach oil cylinder moves forward；When the second hydraulic fluid port oil inlet, before described
Move the piston rod retraction of oil cylinder；
The lock valve is connect by first pipe with first hydraulic fluid port, and the lock valve also passes through second pipe and described the
Two hydraulic fluid ports connect, and the first pipe is connected with the second pipe by balanced valve, and the balanced valve is used to work as the Forward
Internal overflow when oil cylinder overloads, to balance the oil pressure between the first pipe and the second pipe.
2. according to claim 1 prevent the reach truck hydraulic system that door frame slides back and forth, which is characterized in that described
Balanced valve is Bidirectional balanced valve, when the first check valve for being connect with the first pipe in the Bidirectional balanced valve is opened described in the
One hydraulic fluid port oil inlet, while being connected with the oil circuit of second pipe connection in the Bidirectional balanced valve, so that second hydraulic fluid port
Oil return；Two hydraulic fluid port oil inlets described in when the second check valve being connect with the second pipe in the Bidirectional balanced valve is opened, simultaneously
It is connected with the oil circuit of first pipe connection in the Bidirectional balanced valve, so that the first hydraulic fluid port oil return.
3. according to claim 2 prevent the reach truck hydraulic system that door frame slides back and forth, which is characterized in that described
Fueller includes gear pump and the fuel tank that is connected with the gear pump.
4. according to claim 3 prevent the reach truck hydraulic system that door frame slides back and forth, which is characterized in that described
Gear pump is connect by Inlet oil filter with the fuel tank.
5. according to any one of claims 1 to 4 prevent the reach truck hydraulic system that door frame slides back and forth, feature
It is, the lock valve is three-position four-way valve, and when positioned at the first side position, the first pipe is connected to the fueller,
The second pipe is connected to the fuel tank；When positioned at the second side position, the second pipe is connected to the fueller, institute
First pipe is stated to be connected to the fuel tank；When positioned at middle position, the reach oil cylinder is locked up.
6. according to claim 5 prevent the reach truck hydraulic system that door frame slides back and forth, which is characterized in that described
Return oil filter is additionally provided in fuel tank, the return oil filter is parallel with overflow valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810812859.0A CN108622826B (en) | 2018-07-23 | 2018-07-23 | Forward type forklift hydraulic system capable of preventing front and back sliding of portal frame |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810812859.0A CN108622826B (en) | 2018-07-23 | 2018-07-23 | Forward type forklift hydraulic system capable of preventing front and back sliding of portal frame |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108622826A true CN108622826A (en) | 2018-10-09 |
| CN108622826B CN108622826B (en) | 2023-11-28 |
Family
ID=63689965
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810812859.0A Active CN108622826B (en) | 2018-07-23 | 2018-07-23 | Forward type forklift hydraulic system capable of preventing front and back sliding of portal frame |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108622826B (en) |
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| Publication number | Publication date |
|---|---|
| CN108622826B (en) | 2023-11-28 |
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