CN204022412U - A kind of forklift door frame incline controller - Google Patents
A kind of forklift door frame incline controller Download PDFInfo
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- CN204022412U CN204022412U CN201420391458.XU CN201420391458U CN204022412U CN 204022412 U CN204022412 U CN 204022412U CN 201420391458 U CN201420391458 U CN 201420391458U CN 204022412 U CN204022412 U CN 204022412U
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- hypsokinesis
- dump ram
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Abstract
The utility model discloses a kind of forklift door frame incline controller, comprise dump ram, it is characterized in that: also comprise controller, the signal output part signal input part of controller being connected with inclination sensor and controller is connected with Oil pump electrical machinery, at the multi-path signal input end of controller promising trigger switch in parallel with between voltage incoming end, lean forward switch and hypsokinesis switch, lean forward electromagnetic valve and hypsokinesis electromagnetic valve is parallel with between the multi-path signal mouth and ground terminal of controller, the fuel pump outlet that Oil pump electrical machinery drives is connected dump ram oil circuit through the electromagnetic valve that leans forward after hypsokinesis solenoid control, make the piston rod reach of dump ram or retreat.The utility model provides one to realize door frame to tilt to associate with pallet fork lifting altitude and control, be convenient to driver's operation, the forklift door frame incline controller that good stability, reliability and safety performance are high.
Description
Technical field
The utility model belongs to the technical field of fork truck, particularly a kind of forklift door frame incline controller.
Background technology
Fork truck, as industrial transportation vehicle, to load and unload member pallet cargo, stacking and short range hauling operation.Wherein, take storage battery as the electri forklift of power, owing to not polluting, noise is little, is therefore widely used in in-house operation and other operating mode higher to environmental requirement, as industries such as medicine, food, and progressively replaces diesel fork lift truck.
Common common fork truck many employings two-stage door frame, two-stage door frame is made up of inner upright mounting and outer mast, and the pallet fork be suspended on crotch moves up and down along inner upright mounting by means of crotch roller together with crotch, drives cargo lifting or decline.Inner upright mounting drives lifting by lift oil tank, is also led by roller.The both sides at door frame rear are provided with dump ram, door frame can be made to lean forward or swing back, get and stack goods in order to fork.
Existing fork truck, generally centered by door frame upright position, controls door frame by dump ram and tilts forward or backward, fork truck when hoisting goods, in order to operation needs and fork truck stable, need by adjusting the angle of inclination of door frame.Existing fork truck is not made relevance to the inclination of door frame and lifting altitude and is automatically controlled, when forklift workability, the inclination control of door frame relies on the operating experience of navigating mate completely, and the lifting altitude of the stability that fork truck loading hoists and the angular dimension that door frame tilts and goods has substantial connection, particularly when door frame is in maximum forward leaning angle, along with goods raises gradually, the center of gravity of fork truck offsets, for the chaufeur that experience is fewer or more careless, when close to or when going beyond the limit of fork truck very easily tumble, the accidents such as goods falls, the personal safety of chaufeur and cargo security are threatened, reduce stability and the reliability of fork truck.
Utility model content
The technical problems to be solved in the utility model is the present situation for prior art, provides one to realize door frame and tilts to associate with pallet fork lifting altitude and control, be convenient to driver's operation, the forklift door frame incline controller that good stability, reliability and safety performance are high.
The utility model solves the problems of the technologies described above adopted technical scheme: a kind of forklift door frame incline controller, comprise for controlling dump ram that forklift door frame tilts forward and back and controlling the lift oil tank that pallet fork hoists, it is characterized in that: also comprise controller, the signal input part of described controller is connected with for detecting forklift door frame angle of inclination and the signal output part of inclination sensor and controller that measurement signal is passed to controller connects the Oil pump electrical machinery that promising dump ram and lift oil tank provide hydraulic oil, in addition, the trigger switch for limiting pallet fork rise height of trigger level is provided at the multi-path signal input end of shown controller promising controller in parallel with between voltage incoming end, for controlling lean forward switch and the hypsokinesis switch for controlling forklift door frame hypsokinesis that forklift door frame leans forward, shown controller multi-path signal mouth be parallel with the electromagnetic valve and coordinate the hypsokinesis electromagnetic valve of hypsokinesis switch of leaning forward coordinating the switch that leans forward between ground terminal, the fuel pump outlet that Oil pump electrical machinery drives is connected dump ram oil circuit through the electromagnetic valve that leans forward after hypsokinesis solenoid control, make the piston rod reach of dump ram or retreat.
Preferably, lean forward described in electromagnetic valve and hypsokinesis electromagnetic valve is combined into a three position four-way electromagnetic valve.When three position four-way electromagnetic valve is in meta, dump ram is failure to actuate, when three position four-way electromagnetic valve 1DT obtains electric, right position is enable, hydraulic oil enters from the rodless cavity of dump ram, the piston rod of dump ram stretches out, door frame leans forward, the right position of three position four-way electromagnetic valve is made to be equivalent to the electromagnetic valve that leans forward, when three position four-way electromagnetic valve 2DT obtains electric, left position is enable, hydraulic oil enters from the rod chamber of dump ram, the piston rod of dump ram is retracted, door frame hypsokinesis, the left position of three position four-way electromagnetic valve is made to be equivalent to a hypsokinesis electromagnetic valve, like this, achieve and two electromagnetic valves are integrated on an electromagnetic valve, make hydraulic system structure more compact.
Simultaneously, this forklift door frame incline controller also comprises the hydraulic control system of dump ram, this hydraulic control system comprises described dump ram, described Oil pump electrical machinery, described three position four-way electromagnetic valve, oil pump, by pass valve, return filter and fuel tank, Oil pump electrical machinery is connected with oil pump, the oil inlet of oil pump is connected with fuel tank, the oil outlet of oil pump is connected with the P mouth of three position four-way electromagnetic valve, the T mouth of three position four-way electromagnetic valve is connected with return filter and is connected with fuel tank afterwards, A mouth and the B mouth of three position four-way electromagnetic valve are connected rodless cavity and the rod chamber of dump ram respectively, by pass valve is connected with between the oil outlet and the oil inlet of return filter of oil pump.After Oil pump electrical machinery obtains control signal, the work of control oil pump, when lean forward switch or hypsokinesis switch do not trigger, three position four-way electromagnetic valve meta is enable, and Oil pump electrical machinery quits work, and door frame is static; When after the switch triggering that leans forward, Oil pump electrical machinery work, meanwhile, three position four-way electromagnetic valve 1DT obtains electric, and hydraulic oil enters from the rodless cavity of dump ram, and the piston rod of dump ram stretches out, and door frame leans forward; When after hypsokinesis switch triggering, Oil pump electrical machinery work, meanwhile, three position four-way electromagnetic valve 2DT obtains electric, and hydraulic oil enters from the rod chamber of dump ram, and the piston rod of dump ram is retracted, door frame hypsokinesis; In addition, utilize by pass valve as decompression protection, before hydraulic oil is back to fuel tank after system, return filter ensure that the clean of hydraulic oil.
In addition, described trigger switch is arranged on the upper end of outer mast, and when pallet fork rises to constrain height conflict, this trigger switch closes activation.
Described inclination sensor is digital regulation resistance, this digital regulation resistance is connected on vehicle frame, the rotating shaft of this digital regulation resistance is fixedly connected with driven swing arm, driven swing is resisted against in initiatively swing arm, initiatively swing arm is fixedly connected with described dump ram, and cylinder body and the vehicle frame of described dump ram are hinged, and piston rod and the door frame of described dump ram are hinged, meanwhile, between digital regulation resistance and driven swing arm, be provided with the torsion spring driven swing arm be pressed in all the time in initiatively swing arm.The piston rod of dump ram stretches out, when retracting, dump ram swings, the heeling condition of door frame reacts the pendulum angle at dump ram, dump ram swing by initiatively swing arm, pass to driven swing arm, the rotating shaft that slave pendulum arm straps moves digital regulation resistance rotates, digital regulation resistance output voltage signal, finally, the monitoring to door frame angle of inclination is achieved.
Described digital regulation resistance output voltage is 0 ~ 5V, and when door frame rotates from maximum hypsokinesis angle to maximum forward leaning angle, digital regulation resistance output voltage is from 0 ~ 5V linear change.
The maximum forward leaning angle of described door frame is 3 ~ 6 degree.
The maximum hypsokinesis angle of described door frame is 10 ~ 13 degree.
Compared with prior art, owing to the utility model has the advantage of: when forklift door frame tilts forward and back, inclination sensor will detect the angle that door frame tilts forward and back, the change that the angle change of this door frame changes into magnitude of voltage is passed to controller by inclination sensor, trigger switch will be touched when pallet fork rises and rises to certain altitude, trigger switch is closed enable, the opening and closing of trigger switch closes signal transmission to controller, the signal that controller detects according to inclination sensor and trigger switch, after carrying out signal transacting, control to lean forward the power on/off of electromagnetic valve and hypsokinesis electromagnetic valve by controller, and the opening and closing of Oil pump electrical machinery, achieve the oil-feeding control of Oil pump electrical machinery to dump ram and lift oil tank.When the switch that leans forward closes, Oil pump electrical machinery work, meanwhile, lean forward solenoid valves, and dump ram protracts, and forklift door frame turns forward, when hypsokinesis switch closes, Oil pump electrical machinery work, meanwhile, and hypsokinesis solenoid valves, dump ram retrude, door frame tilts backwards, when pallet fork is for before touching trigger switch, door frame can lean forward, hypsokinesis is to maximum angle position, when after shake-up trigger switch, namely the height that pallet fork rises has exceeded the safe altitude of fork truck setting, because the center of gravity of goods is in higher position, when door frame turns forward, fork truck is easily tumbled, now, allow door frame hypsokinesis to maximum angle, but when door frame forward leaning angle exceedes restriction forward leaning angle, controller will disconnect lean forward electromagnetic valve and Oil pump electrical machinery just at work automatically, thus door frame forward leaning angle is controlled within the scope of restriction forward leaning angle, in further scheme, this restriction forward leaning angle is 2 degree, in addition, if pallet fork is not before touching trigger switch, when door frame forward leaning angle has been in and has limited forward leaning angle position, this Time Controller control oil pump motor is to lift oil tank oil-feed, pallet fork is made to increase, when pallet fork rises shake-up trigger switch, controller makes hypsokinesis solenoid valves, with seasonal Oil pump electrical machinery work, makes dump ram retrude, forklift door frame tilts backwards, until upright position, now, hypsokinesis electromagnetic valve power-off, Oil pump electrical machinery quits work, thus forklift door frame is automatically tuned in security standpoint.The utility model controls leaning forward of door frame or hypsokinesis by the switch enclosure hypsokinesis switch that leans forward; be convenient to driver's operation; in addition; the control of maximum forward leaning angle is coordinated by trigger switch; effectively prevent the generation of the accidents such as fork truck is tumbled, goods falls; protect the personal safety of chaufeur and the safety of goods, improve the good stability of fork truck, reliability and safety performance high.
Accompanying drawing explanation
Fig. 1 is the control circuit connection diagram of forklift door frame incline controller in the utility model embodiment;
Fig. 2 is the structural representation of forklift door frame incline controller in the utility model embodiment;
Fig. 3 is the digital regulation resistance scheme of installation of forklift door frame incline controller in the utility model embodiment;
Fig. 4 is the trigger switch scheme of installation of forklift door frame incline controller in the utility model embodiment;
Fig. 5 is the structural representation of forklift door frame incline controller door frame forward-lean state in the utility model embodiment;
Fig. 6 be in the utility model embodiment forklift door frame incline controller door frame lean forward 5 degree time structural representation;
Fig. 7 is the structural representation of forklift door frame incline controller door frame retroverted state in the utility model embodiment;
Structural representation when Fig. 8 is forklift door frame incline controller door frame hypsokinesis 5 degree in the utility model embodiment;
Fig. 9 be in the utility model embodiment the hypsokinesis of forklift door frame incline controller door frame to the structural representation of upright position;
Figure 10 is the diagram of circuit of fork truck anti-dumping control method in the utility model embodiment;
Figure 11 is that lean forward in the utility model embodiment electromagnetic valve and hypsokinesis electromagnetic valve is integrated the hydraulic principle figure of form;
Figure 12 is lean forward in the utility model embodiment electromagnetic valve and hypsokinesis electromagnetic valve is the hydraulic principle figure of separate form;
Figure 13 is the control block diagram that the utility model embodiment medium dip sensor detects feedback.
Detailed description of the invention
Below in conjunction with accompanying drawing embodiment, the utility model is described in further detail.
As shown in Fig. 1 to 13, forklift door frame incline controller in this enforcement, comprise the hydraulic control system etc. of dump ram 11, pallet fork 13, door frame, lift oil tank, controller 1, inclination sensor, trigger switch 6, the switch 8 that leans forward, hypsokinesis switch 7, the electromagnetic valve 3 that leans forward, hypsokinesis electromagnetic valve 4, Oil pump electrical machinery 2 and dump ram 11, wherein, door frame includes outer mast 14 and inner upright mounting 15.
Wherein, dump ram 11 tilts forward and back for controlling forklift door frame, lift oil tank hoists for controlling pallet fork 13, the signal input part of controller 1 is connected with for detecting forklift door frame angle of inclination and the signal output part of inclination sensor and controller that measurement signal is passed to controller 1 connects the Oil pump electrical machinery 2 that promising dump ram 11 and lift oil tank provide hydraulic oil, in addition, the trigger switch 6 for limiting pallet fork 13 rise height of trigger level is provided at the multi-path signal input end of controller 1 promising controller 1 in parallel with between voltage incoming end, for controlling lean forward switch 8 and the hypsokinesis switch 7 for controlling forklift door frame hypsokinesis that forklift door frame leans forward, controller 1 multi-path signal mouth be parallel with lean forward electromagnetic valve 3 and the hypsokinesis electromagnetic valve 4 that coordinates hypsokinesis switch 7 to work that coordinate the switch 8 that leans forward to work between ground terminal, the fuel pump outlet that Oil pump electrical machinery 2 drives is connected dump ram 11 oil circuit after the electromagnetic valve 3 that leans forward controls with hypsokinesis electromagnetic valve 4, make the piston rod reach of dump ram 11 or retreat.
In addition, trigger switch 6 is arranged on the upper end of outer mast 14, and when pallet fork 13 rises to constrain height conflict, this trigger switch 6 closes activation.
Inclination sensor can be the multiple angular transducer for measuring rotating shaft angle, digital regulation resistance 5 is preferentially selected in the present embodiment, this digital regulation resistance 5 is connected on vehicle frame 12, the rotating shaft of this digital regulation resistance 5 is fixedly connected with driven swing arm 9, driven swing 9 is resisted against in initiatively swing arm 10, initiatively swing arm 10 is fixedly connected with dump ram 11, cylinder body and the vehicle frame of dump ram 11 are hinged, piston rod and the door frame of dump ram 11 are hinged, simultaneously, the torsion spring driven swing arm 9 be pressed in all the time in initiatively swing arm 10 is provided with between digital regulation resistance 5 and driven swing arm 9.The piston rod of dump ram 11 stretches out, when retracting, dump ram 11 swings, the heeling condition of door frame reacts the pendulum angle at dump ram 11, dump ram 11 swing by initiatively swing arm 10, pass to driven swing arm 9, driven swing arm 9 drives the rotating shaft of digital regulation resistance 5 to rotate, digital regulation resistance 5 output voltage signal, finally, the monitoring to door frame angle of inclination is achieved.
This digital regulation resistance 5 output voltage is 0 ~ 5V, and when door frame rotates from maximum hypsokinesis angle to maximum forward leaning angle, digital regulation resistance 5 output voltage is from 0 ~ 5V linear change, and wherein, the maximum forward leaning angle of the door frame of setting is 3 ~ 6 degree; The maximum hypsokinesis angle of door frame is 10 ~ 13 degree.
Wherein, the concrete mode that inclination sensor, trigger switch 7, the switch 8 that leans forward, the electromagnetic valve 3 that leans forward, hypsokinesis switch 7, hypsokinesis electromagnetic valve 4 and Oil pump electrical machinery 2 are connected on controller 1 is: between controller 1 and voltage incoming end, be parallel with trigger switch 6, lean forward switch 8 and hypsokinesis switch 7, lean forward electromagnetic valve 3 and hypsokinesis electromagnetic valve 4 is parallel with between controller 1 and ground terminal, Oil pump electrical machinery 2 inputs, mouth is connected with controller 1, and input, the mouth of digital regulation resistance 5 are connected with controller 1.When the switch 8 that leans forward closes, controller 1 obtains a high level, after this high level is carried out calculation process by controller 1, export the electromagnetic valve 3 that makes to lean forward electric control signal, make to lead to the oil circuit conducting that dump ram 11 makes door frame lean forward, meanwhile, controller 1 exports the control signal that Oil pump electrical machinery 2 is worked, and provides hydraulic oil for dump ram 11; When hypsokinesis switch 7 closes, its principle of work is identical with the switch 8 that leans forward; When Oil pump electrical machinery 11 provides hydraulic oil for lift oil tank, when pallet fork rises to constrain height, trigger switch 6 is triggered, and controller 1 will send and make the out-of-work control signal of Oil pump electrical machinery 2, and its control circuit connects as shown in Figure 1.
Wherein, tilt forward and back in control process at door frame, owing to the addition of the detection retroactive effect to door frame angle of inclination of digital regulation resistance 5, the control that tilts forward and back of door frame is made to constitute closed loop control, as shown in figure 13, also select to lean forward or hypsokinesis pattern by setting tilt quantity, by signal transmission to controller 1, control signal is sent again by controller 1, make to lean forward electromagnetic valve 3 or hypsokinesis electromagnetic valve 4 closes, Oil pump electrical machinery 2 works, the piston rod of dump ram 11 is finally made to stretch out or retract, control leaning forward or hypsokinesis of door frame, at the same time, digital regulation resistance 5 detects the heeling condition of door frame in real time, and by data feedback to input, thus achieve to tilt to carry out Closed control to door frame.
In this enforcement, when lean forward electromagnetic valve 3 and hypsokinesis electromagnetic valve 4 are respectively as independent electromagnetic valve, lean forward electromagnetic valve 3 and hypsokinesis electromagnetic valve 4 can adopt a two-position four-way solenoid valve, initial condition respectively, lean forward electromagnetic valve 3 and hypsokinesis electromagnetic valve 4 is all in stop bit, now, dump ram 11 is failure to actuate, and when leaning forward, switch 8 closes, when the 1DT of electromagnetic valve 3 of making to lean forward obtains electric, hydraulic oil enters from the rodless cavity of dump ram 11, and the piston rod of dump ram 11 stretches out, and door frame leans forward; When hypsokinesis switch 7 closes, when making the 2DT of hypsokinesis electromagnetic valve 4 obtain electric, hydraulic oil enters from the rod chamber of dump ram 11, the piston rod of dump ram 11 is retracted, door frame hypsokinesis, like this, by controlling to lean forward switch 8 or hypsokinesis switch 7, select the oil-feed mode that dump ram 11 is different, realize leaning forward and reclining movement control of door frame, its hydraulic principle as shown in figure 12.
As the another kind of set-up mode of lean forward electromagnetic valve 3 and hypsokinesis electromagnetic valve 4, lean forward electromagnetic valve 3 and hypsokinesis electromagnetic valve 4 can also be combined into a three position four-way electromagnetic valve 16.When three position four-way electromagnetic valve 16 is in meta, dump ram 11 is failure to actuate, when the 1DT of three position four-way electromagnetic valve 16 obtains electric, right position is enable, hydraulic oil enters from the rodless cavity of dump ram 11, the piston rod of dump ram 11 stretches out, door frame leans forward, the right position of three position four-way electromagnetic valve 16 is made to be equivalent to the electromagnetic valve 3 that leans forward, when the 2DT of three position four-way electromagnetic valve 16 obtains electric, left position is enable, hydraulic oil enters from the rod chamber of dump ram 11, the piston rod of dump ram 11 is retracted, door frame hypsokinesis, the left position of three position four-way electromagnetic valve 16 is made to be equivalent to a hypsokinesis electromagnetic valve 4, like this, achieve and two electromagnetic valves are integrated on an electromagnetic valve, make hydraulic system structure more compact, its hydraulic principle as shown in figure 11.
Based on this three position four-way electromagnetic valve 16, this forklift door frame incline controller also comprises the hydraulic control system of dump ram 11, this hydraulic control system comprises dump ram 11, Oil pump electrical machinery 2, three position four-way electromagnetic valve 16, oil pump 19, by pass valve 17, return filter 18 and fuel tank 20, Oil pump electrical machinery 2 is connected with oil pump 19, the oil inlet of oil pump 19 is connected with fuel tank 20, the oil outlet of oil pump 19 is connected with the P mouth of three position four-way electromagnetic valve 16, the T mouth of three position four-way electromagnetic valve 16 is connected with return filter 18 and is connected with fuel tank 20 afterwards, A mouth and the B mouth of three position four-way electromagnetic valve 16 are connected rodless cavity and the rod chamber of dump ram 11 respectively, by pass valve 17 is connected with between the oil outlet and the oil inlet of return filter 18 of oil pump 19.After Oil pump electrical machinery 2 obtains control signal, the work of control oil pump 19, when lean forward switch 8 or hypsokinesis switch 7 do not trigger, three position four-way electromagnetic valve 16 meta is enable, and Oil pump electrical machinery 2 quits work, and door frame is static; After the switch 8 that leans forward triggers, Oil pump electrical machinery 2 works, and meanwhile, the 1DT of three position four-way electromagnetic valve 16 obtains electric, and hydraulic oil enters from the rodless cavity of dump ram 11, and the piston rod of dump ram 11 stretches out, and door frame leans forward; After hypsokinesis switch 7 triggers, Oil pump electrical machinery 2 works, and meanwhile, the 2DT of three position four-way electromagnetic valve 16 obtains electric, and hydraulic oil enters from the rod chamber of dump ram 11, and the piston rod of dump ram 11 is retracted, door frame hypsokinesis; In addition, utilize by pass valve 17 as decompression protection, before hydraulic oil is back to fuel tank 20 after system, return filter 18 ensure that the clean of hydraulic oil, as shown in figure 11.
The utility model provides the fork truck anti-dumping control method based on above-mentioned forklift door frame incline controller, as shown in Figure 10, comprises the following steps:
In step a, judge the whether closed activation of trigger switch 6 and door frame heeling condition, if trigger switch 6 closes and door frame leans forward, then perform step b, if the closed and door frame hypsokinesis of trigger switch 6 or the not closed and door frame hypsokinesis of trigger switch 6, then, after performing step c, continue to perform step k, open if trigger and do not close 6 closed and door frames and lean forward, then perform steps d;
In step b, judge whether forklift door frame forward leaning angle is greater than restriction forward leaning angle, after if so, then performing step f, continue to perform step k, if not, then after performing step e, return and perform step b;
In step c, door frame can hypsokinesis to maximum angle;
In steps d, judge whether forklift door frame forward leaning angle is greater than restriction forward leaning angle, after if so, then performing step g, then perform step h, then perform step I, finally enter step k, if not, then after performing step j, continue to perform step k;
In step e, the electromagnetic valve 3 that leans forward is energized, and forklift door frame can continue to lean forward;
In step f, electromagnetic valve 3 power-off of leaning forward, oil pump motor 2 stall;
In step g, pallet fork 13 rises, touch trigger switch 6, makes triggering open 6 passes and closes activation;
In step h, hypsokinesis switch 7 is connected, and hypsokinesis electromagnetic valve 4 is energized, and Oil pump electrical machinery 2 works, and door frame hypsokinesis is to upright position;
In step I, hypsokinesis electromagnetic valve 4 power-off, oil pump motor 2 stall;
In step j, door frame can forward to maximum angle;
In step k, door frame inclination control is in security standpoint.
Wherein, being preferably located at restriction forward leaning angle is 2 degree.
When forklift door frame tilts forward and back, digital regulation resistance 5 will detect the angle that door frame tilts forward and back, the change that the angle change of this door frame is changed into magnitude of voltage by digital regulation resistance 5 passes to controller 1, trigger switch 6 will be touched when pallet fork 13 rises to certain altitude, trigger switch 6 is closed enable, the opening and closing of trigger switch 6 closes signal transmission to controller 1, the signal that controller 1 detects according to digital regulation resistance 5 and trigger switch 6, after carrying out signal transacting, control to lean forward the power on/off of electromagnetic valve 3 and hypsokinesis electromagnetic valve 4 by controller 1, and the opening and closing of Oil pump electrical machinery 2, realize the oil-feeding control to Oil pump electrical machinery 2 pairs of dump rams 11 and lift oil tank.
When the switch 8 that leans forward closes, Oil pump electrical machinery 2 works, and the electromagnetic valve 3 that leans forward is energized, and dump ram 11 protracts, and forklift door frame turns forward, as shown in Figure 5,6; When hypsokinesis switch 7 closes, Oil pump electrical machinery 2 works, and hypsokinesis electromagnetic valve 4 is energized, dump ram 11 retrude, and door frame tilts backwards, as shown in Figure 7,8; When pallet fork 13 is for before touching trigger switch 6, door frame can lean forward or hypsokinesis to maximum angle position, when after shake-up trigger switch 6, namely the height that pallet fork 13 rises has exceeded the safe altitude of fork truck setting, because the center of gravity of goods is in higher position, when door frame turns forward, fork truck is easily tumbled, now, allow door frame hypsokinesis to maximum angle, but when door frame forward leaning angle is more than 2 degree, controller 1 will disconnect lean forward electromagnetic valve 3 and Oil pump electrical machinery 2 just at work automatically, thus control within the scope of 2 degree by door frame forward leaning angle; In addition, if pallet fork 13 is not before touching trigger switch 6, when door frame forward leaning angle has been in 2 degree of positions, this Time Controller 1 control oil pump motor 2 is to lift oil tank oil-feed, pallet fork 13 is made to increase, when pallet fork 13 rises shake-up trigger switch 6, controller 1 makes hypsokinesis electromagnetic valve 4 be energized, and works with seasonal Oil pump electrical machinery 2, make dump ram 11 retrude, forklift door frame tilts backwards, until upright position, as shown in Figure 9, now, hypsokinesis electromagnetic valve 4 power-off, Oil pump electrical machinery 2 quits work, thus forklift door frame is automatically tuned in security standpoint.
Claims (8)
1. a forklift door frame incline controller, comprise for controlling dump ram that forklift door frame tilts forward and back and controlling the lift oil tank that pallet fork hoists, it is characterized in that: also comprise controller, the signal input part of described controller is connected with for detecting forklift door frame angle of inclination and the signal output part of inclination sensor and controller that measurement signal is passed to controller connects the Oil pump electrical machinery that promising dump ram and lift oil tank provide hydraulic oil, in addition, the trigger switch for limiting pallet fork rise height of trigger level is provided at the multi-path signal input end of shown controller promising controller in parallel with between voltage incoming end, for controlling lean forward switch and the hypsokinesis switch for controlling forklift door frame hypsokinesis that forklift door frame leans forward, shown controller multi-path signal mouth be parallel with the electromagnetic valve and coordinate the hypsokinesis electromagnetic valve of hypsokinesis switch of leaning forward coordinating the switch that leans forward between ground terminal, the fuel pump outlet that Oil pump electrical machinery drives is connected dump ram oil circuit through the electromagnetic valve that leans forward after hypsokinesis solenoid control, make the piston rod reach of dump ram or retreat.
2. forklift door frame incline controller according to claim 1, is characterized in that: described in lean forward electromagnetic valve and hypsokinesis electromagnetic valve be combined into a three position four-way electromagnetic valve.
3. forklift door frame incline controller according to claim 1, is characterized in that: described trigger switch is arranged on the upper end of outer mast, and when pallet fork rises to constrain height conflict, this trigger switch closes activation.
4. forklift door frame incline controller according to claim 2, it is characterized in that: the hydraulic control system also comprising dump ram, this hydraulic control system comprises described dump ram, described Oil pump electrical machinery, described three position four-way electromagnetic valve, oil pump, by pass valve, return filter and fuel tank, Oil pump electrical machinery is connected with oil pump, the oil inlet of oil pump is connected with fuel tank, the oil outlet of oil pump is connected with the P mouth of three position four-way electromagnetic valve, the T mouth of three position four-way electromagnetic valve is connected with return filter and is connected with fuel tank afterwards, A mouth and the B mouth of three position four-way electromagnetic valve are connected rodless cavity and the rod chamber of dump ram respectively, by pass valve is connected with between the oil outlet and the oil inlet of return filter of oil pump.
5. forklift door frame incline controller according to claim 3, it is characterized in that: described inclination sensor is digital regulation resistance, this digital regulation resistance is connected on vehicle frame, the rotating shaft of this digital regulation resistance is fixedly connected with driven swing arm, driven swing is resisted against in initiatively swing arm, initiatively swing arm is fixedly connected with described dump ram, cylinder body and the vehicle frame of described dump ram are hinged, piston rod and the door frame of described dump ram are hinged, meanwhile, between digital regulation resistance and driven swing arm, be provided with the torsion spring driven swing arm be pressed in all the time in initiatively swing arm.
6. forklift door frame incline controller according to claim 5, it is characterized in that: described digital regulation resistance output voltage is 0 ~ 5V, when door frame rotates from maximum hypsokinesis angle to maximum forward leaning angle, digital regulation resistance output voltage is from 0 ~ 5V linear change.
7. forklift door frame incline controller according to claim 6, is characterized in that: the maximum forward leaning angle of described door frame is 3 ~ 6 degree.
8. forklift door frame incline controller according to claim 7, is characterized in that: the maximum hypsokinesis angle of described door frame is 10 ~ 13 degree.
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| CN201420391458.XU CN204022412U (en) | 2014-07-16 | 2014-07-16 | A kind of forklift door frame incline controller |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104108668A (en) * | 2014-07-16 | 2014-10-22 | 宁波如意股份有限公司 | Forklift portal frame tilt control device and forklift anti-rollover control method |
| CN106744515A (en) * | 2016-12-16 | 2017-05-31 | 宁波力达物流设备有限公司 | The automatic leveling device for fork and leveling method of electri forklift |
| CN109941925A (en) * | 2017-12-21 | 2019-06-28 | 比亚迪股份有限公司 | Fork truck |
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2014
- 2014-07-16 CN CN201420391458.XU patent/CN204022412U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104108668A (en) * | 2014-07-16 | 2014-10-22 | 宁波如意股份有限公司 | Forklift portal frame tilt control device and forklift anti-rollover control method |
| CN104108668B (en) * | 2014-07-16 | 2016-05-25 | 宁波如意股份有限公司 | A kind of forklift door frame incline controller and fork truck anti-dumping control method |
| CN106744515A (en) * | 2016-12-16 | 2017-05-31 | 宁波力达物流设备有限公司 | The automatic leveling device for fork and leveling method of electri forklift |
| CN109941925A (en) * | 2017-12-21 | 2019-06-28 | 比亚迪股份有限公司 | Fork truck |
| CN109941925B (en) * | 2017-12-21 | 2020-07-10 | 比亚迪股份有限公司 | Forklift truck |
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