CN205779967U - A kind of self-locking structure that leaning forward of forklift multi-way valve - Google Patents
A kind of self-locking structure that leaning forward of forklift multi-way valve Download PDFInfo
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- CN205779967U CN205779967U CN201620467097.1U CN201620467097U CN205779967U CN 205779967 U CN205779967 U CN 205779967U CN 201620467097 U CN201620467097 U CN 201620467097U CN 205779967 U CN205779967 U CN 205779967U
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Abstract
This utility model relates to hydraulic components of construction machinery technical field, is specifically related to a kind of simple in construction, it is easy to maintenance, and the self-locking structure that leans forward of safe and reliable forklift multi-way valve includes valve body, recuperation valve, end cap one and end cap two and commutation valve rod；Be provided with in valve body connecting hole one that oil duct one connects with oil duct one, actuator port A and with actuator port B；It is provided with load holding valve in described connecting hole one；Main oil inlet P it is provided with on described valve body；The spool of described recuperation valve is positioned at main oil inlet P；Main oil return inlet T it is provided with in described valve body, cavity one and cavity two it is provided with in described commutation valve rod, the throttling pore one connected with cavity one and the throttling pore three connected with cavity two it is provided with on described commutation valve rod perisporium, when the valve rod that commutates moves right, described throttling pore one connects with connecting hole one, when the valve rod that commutates is moved to the left, described throttling pore one connects with main oil return inlet T, and throttling pore three connects with actuator port B.
Description
Technical field
This utility model relates to hydraulic components of construction machinery technical field, is specifically related to a kind of forklift multi-way valve
Lean forward self-locking structure.
Background technology
Fork truck has an important safety index, i.e. when engine misses, in order to avoid occurring that goods is tumbled
Danger, do not allow exist make the situation of hydraulic tilt cylinder action occur because of maloperation handle, this function will
Ask the inclination at banked direction control valves to join section sets to lean forward auto-lock function.Current domestic below 16T forklift multi-way valve is many
Use the structure installing latching valve (including self-locking spool and spring) in valve rod, meet forklift door frame
Lean forward the safety requirements of self-locking.But there is more problem in actual production process in this latching valve: first processes essence
Degree requires that high, complex process and difficulty are big, and owing to self-locking spool is arranged in valve rod, self-locking spool is at valve rod
In, if the least latching valve that there will be of fit clearance is not opened or Guan Bushang, causes forklift door frame to be failure to actuate or front
Incline malfunctioning, if valve rod and self-locking spool fit clearance are excessive, it is possible that shake is existing when forklift door frame leans forward
As；Secondly this structure is in fork truck uses, and when fork truck leans forward, rod chamber back pressure is the highest, owing to this structure leans forward
Time rod chamber oil return need to be by staggered 4 apertures (Φ 0.8～Φ 1.2) on valve rod so that rod chamber pressure
Power is significantly larger than load pressure, can reach the back pressure of 27～30MPa when actual loading is 7～9MPa, cause
It is aging that oil temperature raises acceleration Hydraulic Elements.
Summary of the invention
In order to overcome defect of the prior art, the purpose of this utility model is to provide a kind of simple in construction,
For ease of maintenaince, the self-locking structure that leans forward of safe and reliable forklift multi-way valve.
The purpose of this utility model is achieved in that
The self-locking structure that leans forward of a kind of forklift multi-way valve, including valve body, recuperation valve, is arranged on about valve body two
The end cap one of end and end cap two, the commutation valve rod being arranged in valve body and can moving left and right；Set in described valve body
It is equipped with connecting hole one that oil duct one connects with oil duct one, is horizontally set with on valve body and connects with described connecting hole one
Actuator port A and actuator port B；It is provided with load holding valve in described connecting hole one；On described valve body
It is provided with main oil inlet P；The spool of described recuperation valve is positioned at main oil inlet P；It is provided with in described valve body and leads back
Hydraulic fluid port T, is provided with cavity one and cavity two in described commutation valve rod, described commutation valve rod perisporium is provided with
The throttling pore one of cavity one connection and the throttling pore three that connect with cavity two, when commutating, valve rod moves right
Time dynamic, described throttling pore one connects with connecting hole one, and when the valve rod that commutates is moved to the left, described throttling is little
The main oil return inlet T of Kong Yiyu connects, and throttling pore three connects with actuator port B.
This utility model is further arranged to: described load holding valve includes main valve housing, is arranged on main valve housing one
The valve seat of end, the valve rod being arranged in main valve housing, be set in outside valve rod and the spool that can move along valve rod,
Described main valve housing includes movable part and the export department connected with movable part；Described spool is arranged on described activity
In portion, and slipper seal between one end of spool and export department；It is provided with on described main valve housing with movable part even
Logical through hole two.
This utility model is further arranged to: be provided with connecting hole two on described spool, and valve rod passes described company
Connecing hole two, one end of described valve rod is provided with contiguous block, and the external diameter of described contiguous block is more than described connecting hole two
Diameter.
This utility model is further arranged to: be horizontally arranged with the through hole connected with connecting hole two on described spool
Three, described valve rod is provided with the groove concaved, one end of cavity extends to contiguous block, described groove with
The inwall of connecting hole two forms a pressure chamber, and described through hole three connects with pressure chamber.
This utility model is further arranged to: the other end of described valve rod connects base, base and spool it
Between compress and be provided with elastomeric element one, compress between described base and valve seat and be provided with elastomeric element two.
This utility model highlights compared to existing technology and useful having the technical effect that uses plug-in mounting on valve body to bear
Carrying and keep valve to realize the auto-lock function that leans forward, this structure uses common commutation valve rod, it is only necessary on valve body
Process a connecting hole one, reduce machining accuracy, shake that what existing latching valve structure was common lean forward or lean forward
The phenomenon such as can't lock also not have, design simplified overhauling is convenient；This structure control pressure can be according to actual negative
Carrying regulation, i.e. load is that 7～9MPa time control pressing pressures are adjusted to 10.5MPa, and the rod chamber pressure that leans forward reaches
Just can open load holding valve normal oil return during 10.5MPa, greatly reduce back pressure and reduce heating；This structure exists
Leaning forward when being failure to actuate is a check valve state, it is not necessary to controlled by the fit clearance of valve rod with valve body again
Lean forward amount of leakage, is also greatly simplified assembly technology.
Accompanying drawing explanation
Fig. 1 is work valve block sectional view of the present utility model；
Fig. 2 is the structure sectional view of load holding valve of the present utility model；
Fig. 3 is the C portion enlarged drawing in Fig. 1；
Fig. 4 is the E portion enlarged drawing in Fig. 1；
Fig. 5 is hydraulic principle schematic diagram of the present utility model.
Label implication in figure:
1-valve body；11-oil duct one；12-connecting hole one；2-recuperation valve；3-end cap one；
4-end cap two；5-commutates valve rod；51-cavity one；52-cavity two；53-throttling pore one；
55-throttling pore three；6-load holding valve；61-main valve housing；611-movable part；612-export department；
613-through hole two；62-valve seat；63-valve rod；631-contiguous block；632-groove；64-spool；
641-connecting hole two；642-through hole three；7-presses chamber；8-base；9-elastomeric element one；
10-elastomeric element two.
Detailed description of the invention
With specific embodiment, this utility model is further described below in conjunction with the accompanying drawings:
See shown in Fig. 1 to Fig. 5, the self-locking structure that leans forward of a kind of forklift multi-way valve, including valve body 1, compensate
Valve 2, be arranged on valve body about 1 two ends end cap 1 and end cap 24, be arranged on valve body 1 in and can left and right
The commutation valve rod 5 of movement；It is characterized in that: in described valve body 1, be provided with oil duct 1 and oil duct 1
The connecting hole 1 of connection, the actuator port A that is horizontally set with on valve body 1 and connects with described connecting hole 1 with
And actuator port B；It is provided with load holding valve 6 in described connecting hole 1；It is provided with on described valve body 1
Main oil inlet P；The spool of described recuperation valve 2 is positioned at main oil inlet P；It is provided with main oil return in described valve body 1
Mouth T, is provided with cavity 1 and cavity 2 52, on described commutation valve rod 5 perisporium in described commutation valve rod 5
It is provided with the throttling pore 1 connected with cavity 1 and the throttling pore 3 55 connected with cavity 2 52,
When the valve rod 5 that commutates moves right, described throttling pore 1 connects with connecting hole 1, works as reversal valve
When bar 5 is moved to the left, described throttling pore 1 connects with main oil return inlet T, throttling pore 3 55 and work
Make hydraulic fluid port B connection.
It is further arranged to: described load holding valve 6 includes main valve housing 61, is arranged on main valve housing 61 one end
Valve seat 62, the valve rod 63 being arranged in main valve housing 61, be set in outside valve rod 63 and can move along valve rod 63
Dynamic spool 64, described main valve housing 61 includes movable part 611 and the export department connected with movable part 611
612；Described spool 64 is arranged in described movable part 611, and one end of spool 64 and export department 612 it
Between slipper seal；The through hole 26 connected with movable part 611 it is provided with on described main valve housing 61.
It is further arranged to: being provided with connecting hole 2 641 on described spool 64, valve rod 63 is through described connection
Hole 2 641, one end of described valve rod 63 is provided with contiguous block 631, and the external diameter of described contiguous block 631 is more than
The diameter of described connecting hole 2 641.
It is further arranged to: on described spool 64, be horizontally arranged with the through hole three connected with connecting hole 2 641
642, described valve rod 63 is provided with the groove 632 concaved, one end of cavity extends to contiguous block 631,
Described groove 632 forms a pressure chamber 7 with the inwall of connecting hole 2 641, and described through hole 3 642 is with pressure chamber 7 even
Logical.
It is further arranged to: the other end of described valve rod 63 connects has base 8, between base 8 and spool 64
Compress and be provided with elastomeric element 1, compress between described base 8 and valve seat 62 and be provided with elastomeric element 2 10.
Using plug-in mounting load holding valve 6 on valve body 1 to realize the auto-lock function that leans forward, this structure uses common
Commutation valve rod 5, it is only necessary on valve body 1, process a connecting hole 1, reduce machining accuracy, existing
There is the shake or lean forward and the phenomenon such as can't lock and also do not have of leaning forward that latching valve structure is common, design simplified overhauling
Convenient；This structure control pressure can regulate according to actual loading, and i.e. load is that 7～9MPa time control pressing pressures are adjusted to
10.5MPa, just can open the normal oil return of load holding valve 6, greatly when the rod chamber pressure that leans forward reaches 10.5MPa
Reduce greatly back pressure and reduce heating；This structure is a check valve state when leaning forward and being failure to actuate, it is not necessary to again
Control, by the fit clearance of valve rod 63 with valve body 1, the amount of leakage that leans forward, assembly technology is also greatly simplified.
Operation principle: normally lean forward work time, guide oil enter hydraulic control end cap promote commutation valve rod 5, P mouth oil
Liquid connects oil cylinder rodless cavity by B mouth after the opening of recuperation valve 2 core, promotes oil cylinder to move forward, simultaneously
Cylinder rod chamber fluid enters load holding valve 6 by A, and now the pressure of cylinder rod chamber is that load pressure adds
The promotion pressure of upper rodless cavity, higher than the setting pressure of load holding valve 6, fluid is kept by the load opened
Valve 6 returns to T mouth, and complete normally to lean forward work；When engine misses, maloperation driving handle occurs, first
Oil Guide liquid, owing to there being accumulator can also continue to press on commutation valve rod 5, does not now have oil-feed due to rodless cavity, has bar
The pressure in chamber is load pressure, less than the setting pressure of load holding valve 6, rod chamber can not oil return, lean forward cylinder
There is no action, it is achieved that self-lock protection effect of leaning forward.
Above-described embodiment is only preferred embodiment of the present utility model, limits guarantor of the present utility model the most according to this
Protect scope, therefore: all equivalence changes done according to structure of the present utility model, shape, principle, all should contain
Within protection domain of the present utility model.
Claims (5)
1. the self-locking structure that leans forward of forklift multi-way valve, including valve body, recuperation valve, is arranged on about valve body
The end cap one at two ends and end cap two, be arranged on valve body in and the commutation valve rod that can move left and right；It is characterized in that:
It is provided with connecting hole one that oil duct one connects with oil duct one in described valve body, is horizontally set with on valve body and with described
The actuator port A and actuator port B of connecting hole one connection；It is provided with load holding valve in described connecting hole one；
Main oil inlet P it is provided with on described valve body；The spool of described recuperation valve is positioned at main oil inlet P；Described valve body
Inside it is provided with main oil return inlet T, in described commutation valve rod, is provided with cavity one and cavity two, described commutation valve rod perisporium
On be provided with the throttling pore one connected with cavity one and the throttling pore three connected with cavity two, work as commutation
When valve rod moves right, described throttling pore one connects with connecting hole one, when the valve rod that commutates is moved to the left,
Described throttling pore one connects with main oil return inlet T, and throttling pore three connects with actuator port B.
The self-locking structure that leans forward of a kind of forklift multi-way valve the most according to claim 1, it is characterised in that:
Described load holding valve includes main valve housing, the valve seat being arranged on main valve housing one end, the valve that is arranged in main valve housing
Bar, be set in outside valve rod and the spool that can move along valve rod, described main valve housing include movable part and with work
The export department of dynamic portion connection；Described spool is arranged in described movable part, and one end of spool and export department it
Between slipper seal；The through hole two connected with movable part it is provided with on described main valve housing.
The self-locking structure that leans forward of a kind of forklift multi-way valve the most according to claim 2, it is characterised in that:
Being provided with connecting hole two on described spool, valve rod passes described connecting hole two, and one end of described valve rod is provided with
Contiguous block, the external diameter of described contiguous block is more than the diameter of described connecting hole two.
4., according to the self-locking structure that leans forward of a kind of forklift multi-way valve described in Claims 2 or 3, its feature exists
In: it is horizontally arranged with the through hole three connected with connecting hole two on described spool, described valve rod is provided with inwardly
Recessed groove, one end of cavity extends to contiguous block, and described groove forms a pressure chamber with the inwall of connecting hole two,
Described through hole three connects with pressure chamber.
The self-locking structure that leans forward of a kind of forklift multi-way valve the most according to claim 4, it is characterised in that:
The other end of described valve rod connects base, compresses and be provided with elastomeric element one between base and spool, described
Compress between base and valve seat and be provided with elastomeric element two.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620467097.1U CN205779967U (en) | 2016-05-22 | 2016-05-22 | A kind of self-locking structure that leaning forward of forklift multi-way valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620467097.1U CN205779967U (en) | 2016-05-22 | 2016-05-22 | A kind of self-locking structure that leaning forward of forklift multi-way valve |
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| Publication Number | Publication Date |
|---|---|
| CN205779967U true CN205779967U (en) | 2016-12-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620467097.1U Active CN205779967U (en) | 2016-05-22 | 2016-05-22 | A kind of self-locking structure that leaning forward of forklift multi-way valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205779967U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110307200A (en) * | 2018-05-29 | 2019-10-08 | 林德（中国）叉车有限公司 | A kind of fork truck roll control system and method |
-
2016
- 2016-05-22 CN CN201620467097.1U patent/CN205779967U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110307200A (en) * | 2018-05-29 | 2019-10-08 | 林德（中国）叉车有限公司 | A kind of fork truck roll control system and method |
| CN110307200B (en) * | 2018-05-29 | 2021-04-20 | 林德（中国）叉车有限公司 | Forklift tilt control system and method |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |