CN208216827U - A kind of full-hydraulic forklift independent steering system - Google Patents
A kind of full-hydraulic forklift independent steering system Download PDFInfo
- Publication number
- CN208216827U CN208216827U CN201820460800.5U CN201820460800U CN208216827U CN 208216827 U CN208216827 U CN 208216827U CN 201820460800 U CN201820460800 U CN 201820460800U CN 208216827 U CN208216827 U CN 208216827U
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- Prior art keywords
- valve
- oil
- check valve
- hydraulic
- chamber
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- 239000003921 oil Substances 0.000 claims abstract description 119
- 238000012163 sequencing technique Methods 0.000 claims abstract description 63
- 239000010720 hydraulic oil Substances 0.000 claims abstract description 29
- 238000000034 method Methods 0.000 claims abstract description 6
- 230000008676 import Effects 0.000 claims description 24
- 238000004891 communication Methods 0.000 claims description 12
- 239000012530 fluid Substances 0.000 claims description 6
- 238000005265 energy consumption Methods 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 239000000446 fuel Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
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- Forklifts And Lifting Vehicles (AREA)
Abstract
The utility model relates to a kind of full-hydraulic forklift independent steering systems.Including hydraulic oil container, two-way oil pump and steering cylinder；It further include left hydraulic branch and right hydraulic branch；Left hydraulic branch includes left in line check valve, left Fill valve, left pilot sequencing valve and left check valve；Right hydraulic branch includes right in line check valve, right Fill valve, right pilot sequencing valve and right check valve.When work, the left chamber or right chamber of steering cylinder are since external impact is there may be when instantaneous negative pressure, and left Fill valve or right Fill valve are opened from hydraulic oil container repairing into steering cylinder left chamber or right chamber, and the appearance in the anti-hollow cave of locking system avoids steering procedure unstable；When the overload that the left chamber of steering cylinder or right chamber are generated by external impact, two pilot sequencing valves provide protection, while also to the overload protection of two chamber pressure oil outputs of two-way oil pump.Two pilot sequencing valves can also be such that steering cylinder is locked in the case where motor power loses, and prevent from generating sliding motion because of the leakage of hydraulic oil.
Description
Technical field
The utility model belongs to the hydraulic steering system of vehicle, and in particular to truck hydraulic steering system.
Background technique
Common fork truck hydraulic steering system mainly include hydraulic oil container 1, oil pump 3, flow divider 13, all-hydraulic steering gear 14,
The composition such as steering cylinder 7, system overflow valve 15, referring to fig. 2.The pressure oil that oil pump 3 exports passes through monostable 11 a part of flow divider
Steering cylinder 6 is distributed to by all-hydraulic steering gear 12 with constant flow, another part is reallocated to other oil circuits.So fork
Vehicle once start, oil pump 3 will minimum speed operational proof turn to needed for minimum flow, because oil pump 3 is the unique fuel feeding of system
Source, in order to guarantee the operating rate requirement of door frame equipment, oil pump capacity is accordingly larger, so car once starts, oil pump
Will on-the-job satisfaction steering system minimum flow requirement, energy consumption is high；In addition, flow divider 11 is in order to guarantee to distribute to steering cylinder
Flow is constant, needs certain control pressure, and hydraulic oil will also result in the pressure loss of a part by diverter, therefore
This system pressure loss is big, and energy consumption is high, and system is easily generated heat.
Utility model content
Big in order to solve system pressure loss, the problem of energy consumption is high, and system is easily generated heat, the utility model provides a kind of full liquid
Press fork truck independent steering system.
A kind of full-hydraulic forklift independent steering system includes hydraulic oil container 1, oil pump and steering cylinder 7；The oil pump is double
To oil pump 3.
It further include left hydraulic branch and right hydraulic branch；
The left hydraulic branch includes left in line check valve 2, left Fill valve 4, left pilot sequencing valve 5 and left check valve 6；
The left chamber hydraulic fluid port of the steering cylinder 7 is respectively communicated with the outlet of left check valve 6, left repairing by left four-way pipe 61
The outlet of valve 4 and the import of left pilot sequencing valve 5；The outlet parallel communication of the import of left Fill valve 4 and left pilot sequencing valve 5
Hydraulic oil container 1；The import of left check valve 6 is respectively communicated with the left oil port and left oil inlet list of two-way oil pump 3 by left tee tube 31
Outlet to valve 2, the inlet communication of left in line check valve 2 hydraulic oil container 1；
The right hydraulic branch includes right in line check valve 12, right Fill valve 10, right pilot sequencing valve 9 and right check valve 8；
The right chamber hydraulic fluid port of the steering cylinder 7 is respectively communicated with the outlet of right check valve 8, right repairing by right four-way pipe 62
The outlet of valve 10 and the import of right pilot sequencing valve 9；The import of right Fill valve 10 and the outlet parallel communication of right pilot sequencing valve 9
Hydraulic oil container 1；The import of right check valve 8 by right tee tube 32 be respectively communicated with two-way oil pump 3 right oil port and right oil inlet
The outlet of check valve 2, the inlet communication of right in line check valve 2 hydraulic oil container 1；
The import of left check valve 6 is communicated by left tee tube 41 with the first control oil circuit 51, and the first control oil circuit 51 is connected to
The control port of pilot sequencing valve 9；
The import of right check valve 8 is communicated by right tee tube 42 with the second control oil circuit 52, and the second control oil circuit 52 is connected to
The control port of pilot sequencing valve and left pilot sequencing valve 5；
When work, the left chamber or right chamber of steering cylinder 7 are since external impact is there may be when instantaneous negative pressure, left Fill valve 4
Or right Fill valve 10 opens the appearance in the anti-hollow cave of locking system from 1 repairing of hydraulic oil container into 7 left chamber of steering cylinder or right chamber,
Avoid steering procedure unstable；
When the overload that the left chamber of steering cylinder 7 or right chamber are generated by external impact, the left pilot sequencing valve 5 or the right side
Pilot sequencing valve 9 provides protection, while also to the overload protection of two chamber pressure oil outputs of two-way oil pump 3.
When first control oil circuit 51 and second control oil circuit 52 in there is no pressure oil to pass through when, left pilot sequencing valve 5 into
The oil inlet and outlet of oil outlet and right pilot sequencing valve 9 is not communicated with, and steering cylinder 7 is locked, until electric motor starting operation of oil pump is defeated
Pressure oil could act out；
Left check valve 6 and right check valve 8 are the overloads for preventing the left chamber of steering cylinder 7 or right chamber from being generated by external impact
Impact of the pressure to oil pump 3.
The technical solution further limited is as follows:
The left Fill valve 4 and right Fill valve 10 are check valve.
The left pilot sequencing valve 5 and be balanced valve with right pilot sequencing valve 9.
The utility model has the advantages that following aspect compared with prior art products:
1. the independent steering of the utility model uses two-way oil pump, reduce system because caused by single pumping source fuel feeding pressure damage
The leakage problem in steering procedure become estranged flow loss, while solved.
2. by two Fill valves and two check valves that are arranged in system, avoid issuable cavitation and
Damage of the external impact to steering cylinder and two-way oil pump.
3. left pilot sequencing valve 5 and right pilot sequencing valve 9 are to the left chamber or right chamber of steering cylinder 7 by external impact
The overload of generation provides protective effect.It is simultaneously also the overload protection to two chamber pressure oil outputs of two-way oil pump 3.Two hydraulic controls
Sequence valve can also be such that steering cylinder 7 is locked in the case where motor power loses, and prevent from generating because of the leakage of hydraulic oil
Sliding motion.
4. the vehicle that the utility model can apply on fork truck and be used for other fluid-link steerings.
5. Tthe utility model system structure is simple, light and flexible is turned to, manufacturing cost is low.
Detailed description of the invention
Fig. 1 is Tthe utility model system structure principle chart.
Fig. 2 is common fork truck hydraulic steering system structure principle chart.
Serial number in upper figure: hydraulic oil container 1, left in line check valve 2, two-way oil pump 3, left Fill valve 4, left pilot sequencing valve 5,
Left check valve 6, steering cylinder 7, right check valve 8, right pilot sequencing valve 9, right Fill valve 10, motor 11, right in line check valve 12,
Flow divider 13, all-hydraulic steering gear 14, system overflow valve 15, left tee tube 31, right tee tube 32, left control tee tube 41, the right side
It controls tee tube 41, first and controls oil circuit 51, second control oil circuit 52, left four-way pipe 61, right four-way pipe 62.
Specific embodiment
With reference to the accompanying drawing, by embodiment, the utility model is further described.
Referring to Fig. 1, a kind of full-hydraulic forklift independent steering system includes hydraulic oil container 1, oil pump and steering cylinder 7；Wherein
Oil pump is two-way oil pump 3.
It further include left hydraulic branch and right hydraulic branch；
Left hydraulic branch includes left in line check valve 2, left Fill valve 4, left pilot sequencing valve 5 and left check valve 6；
The left chamber hydraulic fluid port of steering cylinder 7 is respectively communicated with the outlet of left check valve 6, left Fill valve 4 by left four-way pipe 61
Outlet and left pilot sequencing valve 5 import；The outlet parallel communication of the import of left Fill valve 4 and left pilot sequencing valve 5 liquid
Pressure oil case 1；The import of left check valve 6 by left tee tube 31 be respectively communicated with two-way oil pump 3 left oil port and left oil inlet it is unidirectional
The outlet of valve 2, the inlet communication of left in line check valve 2 hydraulic oil container 1；
Right hydraulic branch includes right in line check valve 12, right Fill valve 10, right pilot sequencing valve 9 and right check valve 8；
The right chamber hydraulic fluid port of steering cylinder 7 is respectively communicated with the outlet of right check valve 8, right Fill valve 10 by right four-way pipe 62
Outlet and right pilot sequencing valve 9 import；The outlet parallel communication of the import of right Fill valve 10 and right pilot sequencing valve 9 liquid
Pressure oil case 1；The import of right check valve 8 by right tee tube 32 be respectively communicated with two-way oil pump 3 right oil port and right oil inlet it is unidirectional
The outlet of valve 12, the inlet communication of right in line check valve 12 hydraulic oil container 1；
Left Fill valve 4 and right Fill valve 10 are check valve.
Left pilot sequencing valve 5 and be balanced valve with right pilot sequencing valve 9.
The import of left check valve 6 is communicated by left control tee tube 41 with the first control oil circuit 51, and control oil circuit 51 is connected to
The control port of pilot sequencing valve 9；
The import of right check valve 8 is communicated by right control tee tube 42 with the second control oil circuit 52, and control oil circuit 52 is connected to
The control port of pilot sequencing valve and left pilot sequencing valve 5.
Left in line check valve 2, two-way oil pump 3, left Fill valve 4, left pilot sequencing valve 5, left check valve 6, steering cylinder 7,
Right check valve 8, right pilot sequencing valve 9, right Fill valve 10, motor 11, right in line check valve 12,
Concrete operating principle is described as follows:
When two-way oil pump 3 starts rotary work by motor 11, the right-side cavity of two-way oil pump 3 passes through right in line check valve 12
The left side cavity pressure oil output of the oil suction from hydraulic oil container 1, two-way oil pump 3 passes through left tee tube 31, left control tee tube 41, a left side
Check valve 6 and left four-way pipe 61 enter the left chamber of steering cylinder 7, and the piston in steering cylinder 7 is pushed to move right；Simultaneously bi-directionally
The pressure oil that oil pump 3 exports controls the control mouth that oil circuit 51 enters right pilot sequencing valve 9 by left tee tube 31, first, opens
Right pilot sequencing valve 9 allows the oil inlet and outlet of right pilot sequencing valve 9 to communicate, to guarantee the hydraulic oil of 7 right chamber of steering cylinder output
Hydraulic oil container 1 is flowed back to by right four-way pipe 62 and right pilot sequencing valve 9；At this moment since the unidirectional cutoff of left in line check valve 2 is made
With left in line check valve 2 is closed, so that the left chamber that the right-side cavity pressure oil output of two-way oil pump 3 can only enter steering cylinder 7 pushes away
Dynamic oil cylinder right direction movement.In addition right check valve 8 closes also because of the right chamber pressure oil output of steering cylinder 7 in unidirectional cutoff
Closed state.
Similarly, when two-way oil pump 3 starts opposite direction rotary work, the left side cavity of two-way oil pump 3 passes through left oil inlet list
To the oil suction from hydraulic oil container 1 of valve 2, the right-side cavity pressure oil output of two-way oil pump 3 passes through right tee tube 32, right control tee tube
42, right check valve 8 and right four-way pipe 62 enter the right chamber of steering cylinder 7, and the piston in steering cylinder 7 is pushed to move downward；Together
When two-way oil pump 3 export pressure oil by right tee tube 32, second control oil circuit 52 entrance left pilot sequencing valve 5 control
Mouthful, left pilot sequencing valve 5 is opened, the oil inlet and outlet of left pilot sequencing valve 5 is allowed to communicate, to guarantee that 7 right chamber of steering cylinder exports
Hydraulic oil hydraulic oil container 1 is flowed back to by left four-way pipe 61 and left pilot sequencing valve 5；At this moment due to the list of right in line check valve 12
It is acted on to cut-off, right in line check valve 12 is closed, so that the right-side cavity pressure oil output of two-way oil pump 3 can only enter steering cylinder
7 right chamber pushes the movement of oil cylinder left direction.At this moment right pilot sequencing valve 9 because of the right-side cavity pressure oil output of two-way oil pump 3 at
In closed state, while left check valve 6 also closes shape because the left chamber pressure oil output of steering cylinder 7 is at unidirectional cutoff
State.
When work, the left chamber or right chamber of steering cylinder 7 are since external impact is there may be when instantaneous negative pressure, left Fill valve 4
Or right Fill valve 10 opens the appearance in the anti-hollow cave of locking system from 1 repairing of hydraulic oil container into 7 left chamber of steering cylinder or right chamber,
Avoid steering procedure unstable；
When the overload that the left chamber of steering cylinder 7 or right chamber are generated by external impact, the left pilot sequencing valve 5 or the right side
Pilot sequencing valve 9 provides protection, while also to the overload protection of two chamber pressure oil outputs of two-way oil pump 3.
When first control oil circuit 51 and second control oil circuit 52 in there is no pressure oil to pass through when, left pilot sequencing valve 5 into
The oil inlet and outlet of oil outlet and right pilot sequencing valve 9 is not communicated with, and steering cylinder 7 is locked, until electric motor starting operation of oil pump is defeated
Pressure oil could act out；
Left check valve 6 and right check valve 8 are the overloads for preventing the left chamber of steering cylinder 7 or right chamber from being generated by external impact
Impact of the pressure to oil pump 3.
Claims (3)
1. a kind of full-hydraulic forklift independent steering system, including hydraulic oil container (1), oil pump and steering cylinder (7), feature exists
In:
The oil pump is two-way oil pump (3)；
It further include left hydraulic branch and right hydraulic branch；
The left hydraulic branch includes left in line check valve (2), left Fill valve (4), left pilot sequencing valve (5) and left check valve
(6)；
The left chamber hydraulic fluid port of the steering cylinder (7) is respectively communicated with the outlet of left check valve (6), left benefit by left four-way pipe (61)
The outlet of oil valve (4) and the import of left pilot sequencing valve (5)；The import of left Fill valve (4) and the outlet of left pilot sequencing valve (5)
Parallel communication hydraulic oil container (1)；The import of left check valve (6) is respectively communicated with two-way oil pump (3) by left tee tube (31)
Left oil port and left in line check valve (2) outlet, the inlet communication of left in line check valve (2) hydraulic oil container (1)；
The right hydraulic branch includes right in line check valve (12), right Fill valve (10), right pilot sequencing valve (9) and right check valve
(8)；
The right chamber hydraulic fluid port of the steering cylinder (7) is respectively communicated with the outlet of right check valve (8), right benefit by right four-way pipe (62)
The outlet of oil valve (10) and the import of right pilot sequencing valve (9)；The import of right Fill valve (10) and going out for right pilot sequencing valve (9)
Mouthful parallel communication hydraulic oil container (1)；The import of right check valve (8) is respectively communicated with two-way oil pump by right tee tube (32)
(3) outlet of right oil port and right in line check valve (12), the inlet communication of right in line check valve (12) hydraulic oil container (1)；
The import of left check valve (6) is communicated by left tee tube (41) with the first control oil circuit (51), the first control oil circuit (51)
It is connected to the control port of pilot sequencing valve (9)；
The import of right check valve (8) is communicated by right tee tube (42) with the second control oil circuit (52), the second control oil circuit (52)
It is connected to the control port of pilot sequencing valve and left pilot sequencing valve (5)；
When work, the left chamber or right chamber of steering cylinder (7) are since external impact is there may be when instantaneous negative pressure, left Fill valve (4)
Or right Fill valve (10) is opened from hydraulic oil container (1) repairing into steering cylinder (7) left chamber or right chamber, the anti-hollow cave of locking system
Occur, avoids steering procedure unstable；
When the overload that the left chamber of steering cylinder (7) or right chamber are generated by external impact, the left pilot sequencing valve (5) or the right side
Pilot sequencing valve (9) provides protection, while also to the carry out overload protection of two chamber pressure oil outputs of two-way oil pump (3)；
When there is no pressure oil to pass through in the first control oil circuit (51) and the second control oil circuit (52), left pilot sequencing valve (5)
The oil inlet and outlet of oil inlet and outlet and right pilot sequencing valve (9) is not communicated with, and steering cylinder (7) is locked, until electric motor starting oil pump
Work pressure oil output could act；
Left check valve (6) and right check valve (8) are the mistakes for preventing the left chamber of steering cylinder (7) or right chamber from being generated by external impact
Carry impact of the pressure to oil pump (3).
2. a kind of full-hydraulic forklift independent steering system according to claim 1, it is characterised in that: the left Fill valve
(4) and right Fill valve (10) is check valve.
3. a kind of full-hydraulic forklift independent steering system according to claim 1, it is characterised in that: the left hydraulic control sequence
Valve (5) and be balanced valve with right pilot sequencing valve (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820460800.5U CN208216827U (en) | 2018-04-03 | 2018-04-03 | A kind of full-hydraulic forklift independent steering system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820460800.5U CN208216827U (en) | 2018-04-03 | 2018-04-03 | A kind of full-hydraulic forklift independent steering system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208216827U true CN208216827U (en) | 2018-12-11 |
Family
ID=64504454
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820460800.5U Withdrawn - After Issue CN208216827U (en) | 2018-04-03 | 2018-04-03 | A kind of full-hydraulic forklift independent steering system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208216827U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108583680A (en) * | 2018-04-03 | 2018-09-28 | 安徽合力股份有限公司 | A kind of full-hydraulic forklift independent steering system |
-
2018
- 2018-04-03 CN CN201820460800.5U patent/CN208216827U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108583680A (en) * | 2018-04-03 | 2018-09-28 | 安徽合力股份有限公司 | A kind of full-hydraulic forklift independent steering system |
| CN108583680B (en) * | 2018-04-03 | 2024-01-09 | 安徽合力股份有限公司 | Independent steering system of full hydraulic forklift |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20181211 Effective date of abandoning: 20240109 |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20181211 Effective date of abandoning: 20240109 |