CN203202304U - Multifunctional forklift multi-way valve - Google Patents
Multifunctional forklift multi-way valve Download PDFInfo
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- CN203202304U CN203202304U CN 201320144216 CN201320144216U CN203202304U CN 203202304 U CN203202304 U CN 203202304U CN 201320144216 CN201320144216 CN 201320144216 CN 201320144216 U CN201320144216 U CN 201320144216U CN 203202304 U CN203202304 U CN 203202304U
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- valve
- lifting
- oil
- way valve
- way
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Abstract
The utility model discloses a multifunctional forklift multi-way valve, and belongs to the technical field of forklifts. The multifunctional forklift multi-way valve comprises an oil inlet valve plate, a lifting valve plate, a tilt valve plate, an accessory valve plate and an oil return valve plate. A lifting valve rod, a main oil channel and a lifting working oil channel are arranged on the lifting valve plate, an electromagnetic valve I is arranged on the lifting valve plate, a one-way valve I connected with the electromagnetic valve I is arranged between the lifting oil channel and the main oil channel, a one-way valve core is arranged inside the one-way valve I, a screw plug is arranged at one end of the one-way valve core, an electromagnetic valve II is arranged on the oil return valve plate, and a one-way valve II connected with the electromagnetic valve II is arranged between a high-pressure oil channel II and an oil return channel II. Due to the facts that the one-way valves and the electromagnetic valves are respectively arranged on the lifting valve plate and the oil return valve plate, control to the oil return state of an working oil way of a lifting hydraulic cylinder is achieved, the fact that the decline and operation functions are all in the locking state when no worker sits on a seat is ensured, misoperation is avoided, operational safety of a forklift is improved, and potential safety hazards in the operation process of the forklift are eliminated.
Description
Technical field
The utility model belongs to the fork truck technical field, is specifically related to a kind of forklift operator margin of safety, comfort level of improving, and establishes multi-functional fork truck multi-way valve latching valve and hand switch valve and that have priority function in lifting valve block and oil return valve block.
Background technique
The fork truck multi-way valve structure that present domestic existing fork truck generally uses is: be made up of an oil-feed valve block, an oil return valve block and 2-4 work valve block, integrated monostable diverter valve on the oil-feed valve block, the principle of this fork truck multi-way valve is: when gear oil pump to oil-feed valve block fuel feeding, earlier through monostable diverter valve, monostable diverter valve preferentially is transported to the quantitative hydraulic oil of a part mouth that turns on the oil-feed valve block, give the commutator fuel feeding in the hydraulic system, satisfy the usefulness of fork-truck steering; When commutator was idle, this part fluid that is used for the supply commutator directly flowed back to fuel tank by commutator.Except this part be used for to supply with fluid of commutator, all the other fluid that gear pump is supplied with entered the work valve block, were used for actions such as the hoisting of forklift door frame, inclination.
Existing fork truck in engine operation, when fuel feeding is given multi-way valve, needs the operating grip bar, could control the exercises of forklift door frame, has just had potential safety hazard like this when the driver is sailed out of out seat operation or other people misoperation.And quit work at motor, when multi-way valve does not have fluid to supply with, the valve block that has only the control forklift door frame to tilt has the control valve of self-locking action, and the valve block of existing control forklift door frame lifting does not have auto-lock function, therefore this moment the operate lifting valve rod, the decline function of door frame still can realize, has potential safety hazard.
The model utility content
At the above-mentioned problems in the prior art, the purpose of this utility model is to provide a kind of forklift operator margin of safety, comfort level of improving, and establishes multi-functional fork truck multi-way valve latching valve and hand switch valve and that have priority function in lifting valve block and oil return valve block.
Described a kind of multi-functional fork truck multi-way valve, comprise the oil-feed valve block that connects successively, the lifting valve block, the inclination valve block, accessory valve block and oil return valve block, in the described lifting valve block lifting valve rod is set, main oil gallery and the lifting work oil duct that communicates with lifting actuator port A1, it is characterized in that described lifting valve block is provided with and the orthogonal solenoid valve I of lifting valve rod, be provided with the one-way valve I between lifting work oil duct and the main oil gallery, the one-way valve I is connected with the solenoid valve I and by its control, the one-way valve spool is set in the one-way valve I, one-way valve spool one end is provided with plug screw, described oil return valve block is provided with the solenoid valve II, be provided with the one-way valve II between high-pressure oil duct II and back oil road II, described one-way valve II is connected with the solenoid valve II and controls break-make by the solenoid valve II.
Described a kind of multi-functional fork truck multi-way valve is characterized in that described solenoid valve I is normally closed solenoid valve, and the solenoid valve II is normally open solenoid valve, and the control switch of solenoid valve I and solenoid valve II all is located under the seat of fork truck seat.
Described a kind of multi-functional fork truck multi-way valve, it is characterized in that in the described oil-feed valve block priority spool being set, priority spool one end termination arranges the shunting spring, steering safety valve assembly in parallel is set below the priority spool, be set to the pump oil inlet P in the oil-feed valve block cavity, the hydraulic fluid port CF that is connected with the commutator filler opening, the hydraulic fluid port EF that communicates with the lifting valve block is connected hydraulic fluid port LS, lifting working hole A1 and safety valve oil return inlet T with the control mouth of commutator.
The utility model compared with prior art, has following beneficial effect by adopting above-mentioned technology:
1) the utility model is realized the preferential fuel feeding to steering system by at the oil-feed valve block priority spool being set, and when not turning to, fluid all goes work system, reaches energy-saving effect simultaneously.
2) the utility model is by arranging solenoid valve I and one-way valve I at the lifting valve block, realize the control of oil return state of the working oil path of hoist cylinder, can make when no staff is sitting on the seat, the step-down operation function all is in the lock state, avoid misoperation, improve the operating security of fork truck.
3) the utility model is by arranging manual unloading valve at the lifting valve block, it is plug screw, when solenoid valve is sent out I life fault, make the oily off-load of one-way valve I spring chamber by manual unloading valve, thereby opening the one-way valve I descends forklift door frame, avoid appearing at the phenomenon that forklift door frame descends suddenly when fixing a breakdown, eliminated potential safety hazard;
4) oil-feed valve block of the present utility model, lifting valve block, inclination valve block, accessory valve block and oil return valve block are respectively individual components, are beneficial to the assembling of multi-way valve, and when wherein the part valve block breaks down, can directly take apart separately, and be easy to maintenance;
5) multi-way valve of the present utility model is particularly useful for fork truck, have can make fork truck on the seat nobody time locking fork truck, the operating security of avoiding misoperation occurring, can improve fork truck, eliminate advantage such as forklift operator process safe hidden danger, be suitable for applying.
Description of drawings
Fig. 1 is the plan view of fork truck multi-way valve of the present utility model;
Fig. 2 is the rear view of fork truck multi-way valve of the present utility model;
Fig. 3 is the left view of fork truck multi-way valve of the present utility model;
Fig. 4 is the hydraulic schematic diagram of fork truck multi-way valve of the present utility model;
Fig. 5 is the sectional view of the oil-feed valve block of fork truck multi-way valve of the present utility model;
Fig. 6 is the sectional view of the oil return valve block of fork truck multi-way valve of the present utility model;
Fig. 7 is the sectional view of the lifting valve block meta position of fork truck multi-way valve of the present utility model;
Fig. 8 is the hoist sectional view of position of the lifting valve block of fork truck multi-way valve of the present utility model;
Fig. 9 is the sectional view of the lifting valve block lowering position of fork truck multi-way valve of the present utility model;
Among the figure: 1-oil-feed valve block, 2-lifting valve block, 3-inclination valve block, 4-accessory valve block, 5-oil return valve block, 6-solenoid valve I, 7-solenoid valve II, 8-lifting valve rod, the 9-priority spool, 10-shunts spring, 11-steering safety valve assembly, 12-one-way valve I, 13-one-way valve spool, 14-lifting work oil duct, 15-main oil gallery, 16-guide's oil duct, the manual unloading valve of 17-, 18-high-pressure oil duct I, 19-back oil road I, 20-high-pressure oil duct II, 21-back oil road II, 22-one-way valve II.
Embodiment
The utility model will be further described below in conjunction with Figure of description, but protection domain of the present utility model is not limited in this:
Shown in Fig. 1-9, a kind of multi-functional fork truck multi-way valve, comprise oil-feed valve block 1, lifting valve block 2, inclination valve block 3, accessory valve block 4 and oil return valve block 5, in the described lifting valve block 2 lifting valve rod 8 is set, main oil gallery 15 and the lifting work oil duct 14 that communicates with lifting actuator port A1, described lifting valve block 2 is provided with and lifting valve rod 8 orthogonal solenoid valve I 6, be provided with one-way valve I 12 between lifting work oil duct 14 and the main oil gallery 15, one-way valve I 12 is connected with solenoid valve I 6 and is controlled by solenoid valve I 6, one-way valve spool 13 is set in the one-way valve I 12, one-way valve spool 13 1 ends are provided with manual unloading valve 17, described oil return valve block 5 is provided with solenoid valve II 7, between high-pressure oil duct II 20 and back oil road II 21, be provided with one-way valve II 22, described one-way valve II 22 is connected with solenoid valve II 7 and by solenoid valve II 7 control break-makes, solenoid valve II 7 is normally open solenoid valve.
As shown in Figure 5, in the described oil-feed valve block 1 priority spool 9 is set, priority spool 9 one end terminations arrange shunting spring 10, steering safety valve assembly 11 in parallel is set below the priority spool 9, be set to the pump oil inlet P in oil-feed valve block 1 cavity, the hydraulic fluid port CF that is connected with the commutator filler opening, the hydraulic fluid port EF that communicates with lifting valve block 2 is connected hydraulic fluid port LS, lifting working hole A1 and safety valve oil return inlet T with the control mouth of commutator.When the oil-feed of pump oil inlet P, hydraulic oil through priority spool 9 priority of supplys to hydraulic fluid port CF, when commutator is not worked, this moment, the pressure of hydraulic fluid port LS was zero, the oil-feed of spool right-hand member, and action of hydraulic force is at the spool right-hand member, overcome the precompression of shunting spring 10, spool is moved to the left, and this moment, hydraulic fluid port P was communicated with hydraulic fluid port EF, and pump comes oil to go to go in the work system; When commutator was worked, hydraulic fluid port CF was connected with turning to oil cylinder through commutator, and pump comes oil preferentially to enter to turn to oil cylinder, make fork-truck steering; The pressure signal of hydraulic fluid port LS acts on the left end of spool by throttling pore, this moment, the pressure of spool right-hand member was low than the pressure of commutator outlet, because the variation of two ends, spool left and right sides pressure reduction and the effect of spring, when the commutator rotating speed is very big, make spool move right to closing, the preferential supply of hydraulic oil turns to; When turning to the load overrate, the pressure oil of hydraulic fluid port LS is opened steering safety valve assembly 11, hydraulic fluid port LS release, and priority spool 9 moves to left, and pump comes oil in work system; When work system is not worked, the meta position off-load in multi-way valve.
As shown in Figure 6, be provided with one-way valve II 22 in the oil return valve block 5, be used for the on off operating mode between control oil return valve block high-pressure oil duct II 20 and the oil return valve block back oil road II 21, realize the control of the oil return state of whole oil circuit, thereby make when no staff is positioned on the operation seat, fork truck all is in the lock state, and avoids misoperation, improves the operating security of fork truck.
As shown in Figure 7, when the lifting valve block of fork truck multi-way valve hoists the position, lifting valve block 2 is used for the lifting of control forklift door frame, lifting valve block 2 is provided with solenoid valve I 6, between the lifting work oil duct 14 that is connected with lifting working hole A1 and main oil gallery 15, be provided with the one-way valve I 12 of controlling break-make by described solenoid valve I 6 automatically, the spring chamber of one-way valve spool 13 is provided with the manual unloading valve 17 for the manual unlocking one-way valve, by the one-way valve I 12 of solenoid valve I 6 is set, realize the control of oil return state of the working oil path of lifting hydraulic cylinder, thereby can make when no staff is sitting on the seat, the descending operation function all is in the lock state, avoid misoperation, improve the operating security of fork truck; When solenoid valve I 6 breaks down, by opening manual unloading valve 17, make guide's oil duct 16 in check valve spring chamber communicate with back oil road I 19, difference in areas by one-way valve spool 13, open one-way valve I 12, make and be connected between lifting work oil duct 14 and the main oil gallery 15 of lifting actuator port A1, thereby make the hydraulic oil in the lifting hydraulic cylinder to flow to back oil road I 19 by main oil gallery 15, lay down the fluid of one-way valve I 12 spring chambers, thereby realize the decline of forklift door frame, the phenomenon that door frame descends suddenly when avoiding appearing at the fault eliminating has been eliminated potential safety hazard.
As shown in Figure 8, when the lifting valve block of fork truck multi-way valve hoists the position, 8 commutations of lifting valve rod are in the lifting position of lifting hydraulic cylinder, high pressure oil flows to main oil gallery 15 through high-pressure oil duct I 18, open one-way valve I 12, arrive the lifting work oil duct 14 that is connected with lifting actuator port A1, give lifting hydraulic cylinder by lifting actuator port A1 fuel feeding, door frame is risen.
As shown in Figure 9, during the lifting valve block lowering position of fork truck multi-way valve, 8 commutations of lifting valve rod are at the lowering position of lifting hydraulic cylinder, when 6 energisings of solenoid valve I, guide oil flows to back oil road I 19 from guide oil road 16, the one-way valve I 12 of solenoid valve I 6 controls is opened, and the fluid of lifting hydraulic cylinder passes through lifting work oil duct 14, main oil gallery 15 successively to back oil road I 19, realizes the decline of the door frame of lifting hydraulic cylinder control.Therefore, when solenoid valve I 6 no electric circuits, forklift door frame is in the lock state, and can not descend, and has remedied this lock function that existing fork truck multi-way valve lacks.According to actual needs, the electro-magnet control switch of solenoid valve I 6 can be arranged under the forklift operator seat, controls the switch of solenoid valve I 6 by the seat lifting of seat; Can also respond to driver's posture by being installed in seat inductor in the driver seat, if during driver's fault, solenoid valve I 6 just can not switched on, and all charge and discharge operations also can be stopped; Have only the driver to be sitting on the driver seat with correct posture, the electromagnet of solenoid valve I 6 is just understood proper functioning, and fork truck could be realized lifting action.
When solenoid valve I 6 breaks down, make one-way valve I 12 to open, lifting hydraulic cylinder can't oil return, and the special circumstances that door frame can not descend can appear in fork truck.At this moment, can only open by manual unloading valve 17, the guide oil of guide's oil duct 16 flows to back oil road I 19, hydraulic oil in the lifting hydraulic cylinder just can arrive back oil road I 19 by lifting work oil duct 14, main oil gallery 15 successively like this, realize the oil return of lifting hydraulic cylinder, thereby realize the decline of forklift door frame, avoid when forklift door frame is in the working position, carrying out troubleshooting effort, eliminated potential safety hazard.
Solenoid valve I 6 of the present utility model adopts normally closed solenoid valve, and the control switch of described solenoid valve I 6 is located under the seat of fork truck seat.When forklift door frame is in the decline state, if when not having the staff on the seat, solenoid valve I 6 can be in off-position so, corresponding one-way valve I 12 is in closed condition, disconnect mutually between the lifting work oil duct 14 of lifting actuator port A1 and the main oil gallery 15, hydraulic oil in the lifting work oil duct 14 can oil return, and this moment, forklift door frame can not descend when operating the lifting valve rod.If on the seat staff is arranged, the switch of solenoid valve I 6 is opened, 6 energisings of solenoid valve I, pump comes oil to flow to back oil road I 19 by main oil gallery 15, this moment is owing to exist oil pressure in the lifting work oil duct 14 of lifting actuator port A1, one-way valve I 12 spring chamber fluid flow to back oil road I 19, thereby one-way valve I 12 is opened, hydraulic oil in the lifting hydraulic cylinder flows to back oil road I 19 by lifting work oil duct 14, the main oil gallery 15 of lifting actuator port A1 successively, realize the oil return of the hydraulic oil in the lifting hydraulic cylinder, realize the decline of forklift door frame.Owing to added solenoid valve I 6 and one-way valve I 12, increased the safety protection means one to fork truck, improved the operating security of fork truck.
Claims (3)
1. multi-functional fork truck multi-way valve, comprise the oil-feed valve block (1) that connects successively, lifting valve block (2), inclination valve block (3), accessory valve block (4) and oil return valve block (5), lifting valve rod (8) is set in the described lifting valve block (2), main oil gallery (15) and the lifting work oil duct (14) that communicates with lifting actuator port A1, it is characterized in that described lifting valve block (2) is provided with and the orthogonal solenoid valve I of lifting valve rod (8) (6), be provided with one-way valve I (12) between lifting work oil duct (14) and the main oil gallery (15), one-way valve I (12) is connected with solenoid valve I (6) and by its control, one-way valve spool (13) is set in the one-way valve I (12), one-way valve spool (13) one ends are provided with manual unloading valve (17), described oil return valve block (5) is provided with solenoid valve II (7), be provided with one-way valve II (22) between high-pressure oil duct II (20) and back oil road II (21), described one-way valve II (22) is connected with solenoid valve II (7) and controls break-make by solenoid valve II (7).
2. a kind of multi-functional fork truck multi-way valve according to claim 1, it is characterized in that described solenoid valve I (6) is normally closed solenoid valve, solenoid valve II (7) is normally open solenoid valve, and the control switch of solenoid valve I (6) and solenoid valve II (7) all is located under the seat of fork truck seat.
3. a kind of multi-functional fork truck multi-way valve according to claim 1, it is characterized in that arranging in the described oil-feed valve block (1) priority spool (9), priority spool (9) one end terminations arrange shunting spring (10), steering safety valve assembly (11) in parallel is set below the priority spool (9), be set to the pump oil inlet P in oil-feed valve block (1) cavity, the hydraulic fluid port CF that is connected with the commutator filler opening, the hydraulic fluid port EF that communicates with lifting valve block (2) is connected hydraulic fluid port LS, lifting working hole A1 and safety valve oil return inlet T with the control mouth of commutator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320144216 CN203202304U (en) | 2013-03-27 | 2013-03-27 | Multifunctional forklift multi-way valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320144216 CN203202304U (en) | 2013-03-27 | 2013-03-27 | Multifunctional forklift multi-way valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203202304U true CN203202304U (en) | 2013-09-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320144216 Expired - Lifetime CN203202304U (en) | 2013-03-27 | 2013-03-27 | Multifunctional forklift multi-way valve |
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| Country | Link |
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| CN (1) | CN203202304U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104141650A (en) * | 2014-07-29 | 2014-11-12 | 浙江海宏液压科技股份有限公司 | Load sensitive forklift multi-way valve |
| CN104653820A (en) * | 2015-03-17 | 2015-05-27 | 泸州精通流体液压机械有限公司 | Multi-way valve for small-sized excavator |
| CN106015174A (en) * | 2016-07-06 | 2016-10-12 | 安徽合力股份有限公司 | Test detection device for opening and closing characteristic and durability of safety valve |
| CN106050779A (en) * | 2016-07-18 | 2016-10-26 | 江苏恒立液压科技有限公司 | Multi-way valve of forklift |
| CN113371646A (en) * | 2020-02-25 | 2021-09-10 | 林德（中国）叉车有限公司 | Safety control method and device for forklift |
-
2013
- 2013-03-27 CN CN 201320144216 patent/CN203202304U/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104141650A (en) * | 2014-07-29 | 2014-11-12 | 浙江海宏液压科技股份有限公司 | Load sensitive forklift multi-way valve |
| CN104653820A (en) * | 2015-03-17 | 2015-05-27 | 泸州精通流体液压机械有限公司 | Multi-way valve for small-sized excavator |
| CN106015174A (en) * | 2016-07-06 | 2016-10-12 | 安徽合力股份有限公司 | Test detection device for opening and closing characteristic and durability of safety valve |
| CN106050779A (en) * | 2016-07-18 | 2016-10-26 | 江苏恒立液压科技有限公司 | Multi-way valve of forklift |
| CN106050779B (en) * | 2016-07-18 | 2018-01-23 | 江苏恒立液压科技有限公司 | forklift multi-way valve |
| CN113371646A (en) * | 2020-02-25 | 2021-09-10 | 林德（中国）叉车有限公司 | Safety control method and device for forklift |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130918 |
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| CX01 | Expiry of patent term |