CN108569640A - Lift crotch and the inflight meal vehicle with the lifting crotch - Google Patents
Lift crotch and the inflight meal vehicle with the lifting crotch Download PDFInfo
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- CN108569640A CN108569640A CN201711433518.4A CN201711433518A CN108569640A CN 108569640 A CN108569640 A CN 108569640A CN 201711433518 A CN201711433518 A CN 201711433518A CN 108569640 A CN108569640 A CN 108569640A
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- Prior art keywords
- lifting
- section
- crotch
- current value
- controller
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
- B66F7/00—Lifting frames, e.g. for lifting vehicles; Platform lifts
- B66F7/06—Lifting frames, e.g. for lifting vehicles; Platform lifts with platforms supported by levers for vertical movement
- B66F7/08—Lifting frames, e.g. for lifting vehicles; Platform lifts with platforms supported by levers for vertical movement hydraulically or pneumatically operated
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64F—GROUND OR AIRCRAFT-CARRIER-DECK INSTALLATIONS SPECIALLY ADAPTED FOR USE IN CONNECTION WITH AIRCRAFT; DESIGNING, MANUFACTURING, ASSEMBLING, CLEANING, MAINTAINING OR REPAIRING AIRCRAFT, NOT OTHERWISE PROVIDED FOR; HANDLING, TRANSPORTING, TESTING OR INSPECTING AIRCRAFT COMPONENTS, NOT OTHERWISE PROVIDED FOR
- B64F1/00—Ground or aircraft-carrier-deck installations
- B64F1/32—Ground or aircraft-carrier-deck installations for handling freight
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
- B66F7/00—Lifting frames, e.g. for lifting vehicles; Platform lifts
- B66F7/06—Lifting frames, e.g. for lifting vehicles; Platform lifts with platforms supported by levers for vertical movement
- B66F7/065—Scissor linkages, i.e. X-configuration
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/02—Systems essentially incorporating special features for controlling the speed or actuating force of an output member
- F15B11/04—Systems essentially incorporating special features for controlling the speed or actuating force of an output member for controlling the speed
- F15B11/046—Systems essentially incorporating special features for controlling the speed or actuating force of an output member for controlling the speed depending on the position of the working member
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/16—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors
- F15B11/17—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors using two or more pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/06—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with two or more servomotors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
- F15B21/02—Servomotor systems with programme control derived from a store or timing device; Control devices therefor
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Analytical Chemistry (AREA)
- Chemical & Material Sciences (AREA)
- Aviation & Aerospace Engineering (AREA)
- Forklifts And Lifting Vehicles (AREA)
- Vehicle Body Suspensions (AREA)
Abstract
The present invention discloses a kind of lifting crotch and the inflight meal vehicle with the lifting crotch, the system main line of the hydraulic system of the lifting crotch is equipped with proportional reversing valve, controller is connected to proportional reversing valve, to control input proportional reversing valve proportion electro-magnet electric current current value.Wherein, controller provides the electric current of corresponding current value to proportion electro-magnet according to multiple height sections in lifting crotch stroke, to control the hydraulic flow of supply hydraulic system, and then controls the speed risen or fallen that lifting fork frame torr lifts compartment.The present invention adjusts the design of the size of current for the proportion electro-magnet for providing proportional throttle valve by using controller, realizes control of the controller according to different height to lifting speed.The present invention can make the speed gentle transition during carriage movements, avoid cargo damage in compartment, and improve the comfort level of staff in compartment.
Description
Technical field
The present invention relates to vehicle Special lifting equipment technical fields, in particular to a kind of lifting crotch and with this
Lift the inflight meal vehicle of crotch.
Background technology
Inflight meal vehicle belongs to airport special-purpose vehicle, dedicated for the pantry of passenger plane.Since passenger plane type is various, for matching
The inflight meal vehicle of meal is generally divided into suitable for the plain edition inflight meal vehicle of skycoach and suitable for such as A380 aircrafts
The A380 inflight meal vehicles of airliner.Plain edition inflight meal car body lifts maximum height 6.2m, and carriage body is flat by four-way
Platform is aircraft pantry after being docked with cabin door, and the aircraft cabin door height that such food car can service is generally in 6.2m or less.
A380 inflight meal car body maximum lift heights reach 8.1m, and when for A380 aircraft pantries, lift height is more than 6.2m.
Inflight meal vehicle in the elemental height of the process of decline, lead by variation and hydraulic circuit back pressure fixed value due to load
Compartment has been caused to decline shake and non-uniform movement in initial a period of time by extreme higher position.The solution of this field regarding to the issue above
Certainly method is the lifting using the switching regulator solenoid directional control valve control compartment of 10 latus rectums.Based on this existing design, compartment rises
Rotating speed after speed is raised speed by engine throttle determines, substantially unadjustable, and meter out speed governing or double speed are used when decline
Throttle grverning can only set a kind or 2 kinds of decrease speeds, it is more difficult to solve the jitter problem during babinet declines.
Furthermore when A380 inflight meal vehicles are A380 aircraft pantries, floor compartment terrain clearance reaches 8.1m, and compartment is whole
Body moves forward 3m, and significant changes occur for vehicle center of gravity at this time, and the stability of vehicle is must take into consideration the problem of.During pantry
Significant changes occur for aircraft overall weight, and cabin door terrain clearance, which exists, to be decreased obviously, the food car four-way docked with cabin door
Platform terrain clearance also needs servo-actuated decline, just can guarantee the slitless connection of four-way platform and cabin door.Simultaneously as the system of crotch
It makes assembly precision and controls the leakage of crotch elevating ram hydraulic lock, A380 inflight meal vehicles is caused to lift crotch in a certain height
Automatic slowly when degree stops sinks, and for crotch when 6.1m height stops, the deflection of short transverse reaches 30mm/h, crotch
Automatic decline is current food vehicle hydraulic system common problem.
Invention content
A primary object of the present invention is to overcome at least one defect of the above-mentioned prior art, and providing one kind can carry
For the lifting crotch of three kinds or more decrease speeds.
The present invention another main purpose be to overcome at least one defect of the above-mentioned prior art, providing one kind has
Above-mentioned lifting crotch and the inflight meal vehicle for being suitable for the large aircrafts such as A380.
To achieve the above object, the present invention adopts the following technical scheme that：
According to an aspect of the present invention, a kind of lifting crotch is provided, is set between the vehicle frame and compartment of lorry.The liter
Drop crotch includes crotch component, drives the hydraulic system of the crotch component lifting and control the control of the hydraulic system
Device.Wherein, the system main line of the hydraulic system is equipped with proportional reversing valve, and the controller is connected to the ratio commutation
Valve, to control the proportion electro-magnet for inputting the proportional reversing valve electric current current value.Wherein, the controller is according to institute
Multiple height sections in lifting crotch stroke are stated, the electric current of corresponding current value are provided to the proportion electro-magnet, to control
System supplies the hydraulic flow of the hydraulic system, and then controls the speed risen or fallen that the lifting fork frame torr lifts the compartment
Degree.
One of embodiment according to the present invention, the multiple height sections lifted in crotch stroke are at least
Including high-order section, steady section and low level section from high to low.Wherein, the lifting crotch be in the high-order section,
When steady section and low level section, the current value for the electric current that the controller is provided to the proportion electro-magnet is respectively the first electricity
Flow valuve, the second current value and third current value, the third current value are more than first current value and less than second electricity
Flow valuve.
One of embodiment according to the present invention, the lifting assembly include twin-stage lifting hydraulic cylinder, the lifting
Multiple height sections in crotch stroke, which further include first-stage cylinder, changes a grade section when being changed grade with secondary cylinder.Wherein, the liter
Drop crotch is in described when changing grade section, and the current value of the electric current that the controller is provided to the proportion electro-magnet is described the
One current value.
One of embodiment according to the present invention, grade section of changing is between the high-order section and the meadow
Between between.Alternatively, grade section of changing is between the steady section and the low level section.Alternatively, described change a grade section
It is contained within the steady section, the steady section includes the first steady section and the second steady section, and described changes grade
The height in section is less than the described first steady section and is more than the described second steady section.
One of embodiment according to the present invention, the lifting crotch rise and are still in a height, and the liter
When drop crotch declines automatically, the controller controls the hydraulic system and the lifting crotch is driven to go up to former height, and should
The current value for the electric current that the controller is provided to the proportion electro-magnet during rise is first current value.
One of embodiment according to the present invention, the controller are PLC controller.
The shaft of one of embodiment according to the present invention, the lifting crotch is equipped with rotation angle encoder,
The angle that crotch to detect the lifting crotch rotates.Wherein, the controller is connected to the rotation angle encoder,
To obtain the height section residing for the lifting crotch according to the angle calculation.
According to another aspect of the present invention, a kind of inflight meal vehicle, including vehicle frame and compartment are provided.Wherein, described
Inflight meal vehicle further includes the lifting crotch described in the above embodiment.
One of embodiment according to the present invention, the inflight meal vehicle further include four-way platform, and the four-way is flat
Platform is set to the compartment close to that one end of aircraft door, and the four-way platform is equipped with detection switch；Wherein, the controller
It is connected to the detection switch, detects the crotch angle of the lifting crotch when lifting crotch lifts using a rotary encoder
Degree, and by controller calculate and learn height and position residing for the compartment, the compartment rise and butt up against an aircraft and
When the relatively described compartment of the aircraft drops to the height of the detection switch, the detection switch triggering, the controller control
Make the lifting descending of fork, and the current value of electric current that the controller is provided to the proportion electro-magnet is first electricity
Flow valuve.
One of embodiment according to the present invention, the multiple height sections lifted in crotch stroke include
The high position section, the first steady section, it is described change a grade section, the second steady section and the low level section, and
The current value for the electric current that the controller is provided to the proportion electro-magnet is respectively the first current value, the second current value and third
When current value, the high position section is between 6.8m~8.1m, and the first steady section is between 5.5m~6.8m, the areas Huan Ji
Between between 5.3m~5.5m, the second steady section is between 3.4m~5.3m, and the low level section is between 3.4m or less；With/
Or, first current value is between 0.2A~0.4A, second current value between 0.9A~1A, the third current value between
0.5A~0.6A.
As shown from the above technical solution, lifting crotch proposed by the present invention and inflight meal vehicle with the lifting crotch
Advantage and good effect are：
Lifting crotch and inflight meal vehicle proposed by the present invention adjust the ratio for providing proportional throttle valve by using controller
Control of the controller according to different height to lifting speed is realized in the design of the size of current of example electromagnet.By above-mentioned design,
The present invention can make the speed gentle transition during carriage movements, avoid cargo damage in compartment, and improve in compartment and work
The comfort level of personnel.Also, the present invention can be directed to the existing shake and speed is unequal asks during the motion of lifting crotch
Topic, is adjusted flexibly the movement velocity of crotch.
Description of the drawings
The following detailed description to the preferred embodiment of the present invention, various mesh of the invention are considered in conjunction with the accompanying drawings
Mark, feature and advantage will become apparent.Attached drawing is only the exemplary diagram of the present invention, is not necessarily to paint in proportion
System.In the accompanying drawings, same reference numeral always shows same or similar component.Wherein：
Fig. 1 is a kind of structural schematic diagram of lifting crotch shown according to an illustrative embodiments；
Fig. 2 is the upward view of the lifting crotch shown in Fig. 1；
Fig. 3 is the hydraulic system principle figure of the lifting crotch shown in Fig. 1；
Fig. 4 is the control principle drawing of the lifting crotch shown in Fig. 1.
Wherein, the reference numerals are as follows：
100. lifting crotch；
111. left front supporting leg；
112. left back supporting leg；
120. shaft；
130. rotation angle encoder；
140. twin-stage lifting hydraulic cylinder；
141. first-stage cylinder；
142. secondary cylinder；
210. system main lines；
211. proportional reversing valve；
212. main elevating rams；
220. transversal stretching branches；
221. left front supporting leg transversal stretching oil cylinders；
222. left back supporting leg transversal stretching oil cylinders；
223. right anterior branch leg transversal stretching oil cylinders；
224. right rear support leg transversal stretching oil cylinders；
230. lifting branches；
231. left front supporting leg lifting oil cylinders；
232. left back supporting leg lifting oil cylinders；
233. right anterior branch leg elevating rams；
234. right rear support leg elevating rams；
240. chassis hydraulic power units.
Specific implementation mode
Embodying the exemplary embodiments of feature of present invention and advantage will describe in detail in the following description.It should be understood that this
Invention can have various variations in different embodiments, neither depart from the scope of the present invention, and it is therein explanation and
Attached drawing is inherently illustrative, rather than to limit the present invention.
In being described below the different illustrative embodiments to the present invention, carried out with reference to attached drawing, the attached drawing is formed
The part of the present invention, and the exemplary knot of difference for many aspects that the present invention can be achieved wherein is shown by way of example
Structure, system and step.It should be understood that can use component, structure, exemplary means, system and step other specified schemes, and
And structural and functional modification can be carried out without departing from the scope of the invention.Although moreover, can be used in this specification
Term " upper end ", " lower end ", " between ", " side " etc. the different example features and element of the present invention are described, but this
A little terms in this article merely for convenient, such as with reference to the accompanying drawings described in exemplary direction.It is any interior in this specification
Appearance is not necessarily to be construed that the specific three dimensional direction of Structure of need is just fallen within the scope of the present invention.
Lift crotch embodiment
Refering to fig. 1, the structural representation for the lifting crotch that can embody the principle of the present invention is representatively illustrated in Fig. 1
Figure.In the illustrative embodiments, lifting crotch proposed by the present invention is to be with the lifting crotch suitable for inflight meal vehicle
What example illustrated.It will be readily appreciated by those skilled in the art that for by the lifting crotch be applied to other kinds of vehicle or
In other kinds of equipment, and a variety of remodeling, addition, replacement, deletion or other variations are made to following specific implementation modes,
These variations are still in the range of the principle of lifting crotch proposed by the present invention.
As shown in Figure 1, in the present embodiment, lifting crotch 100 proposed by the present invention can be used for being arranged in lorry
Between vehicle frame and compartment, to realize lifting of the compartment relative to vehicle frame.Specifically, lifting crotch 100 includes mainly crotch
The controller of component, the hydraulic system of driving crotch component lifting and control hydraulic system.Cooperation is refering to Fig. 2 to Fig. 4, Fig. 2
In representatively illustrate can embody the principle of the invention lifting crotch 100 upward view；Energy is representatively illustrated in Fig. 3
Enough embody the hydraulic system principle figure of the lifting crotch 100 of the principle of the invention；This hair can be embodied by being representatively illustrated in Fig. 4
The control principle drawing of the lifting crotch 100 of bright principle.Below in conjunction with above-mentioned attached drawing, to lifting crotch 100 proposed by the present invention
Structure, connection type and the functional relationship of each chief component are described in detail.
As depicted in figs. 1 and 2, in the present embodiment, crotch component can refer to the relevant design of existing lifting crotch.Tool
For body, which includes mainly front leg strut and rear support leg arranged in a crossed manner, and the middle part of front leg strut and rear support leg can turn
It connects dynamicly.Front leg strut includes left front supporting leg 111 and right anterior branch leg disposed in parallel, and rear support leg includes left back branch disposed in parallel
Leg 112 and right rear support leg.Wherein, the existing design with reference to lifting crotch 100 on such as vehicle of inflight meal vehicle, left front branch
One end of leg 111 and right anterior branch leg is rotatably connected at the vehicle frame front end of inflight meal vehicle, 111 He of left front supporting leg by shaft
The other end of right anterior branch leg is rotationally and slidably connected to the car bottom of inflight meal vehicle.After left back supporting leg 112 and the right side
One end of supporting leg is rotationally and slidably connected to the vehicle frame of inflight meal vehicle, left back supporting leg 112 and right rear support leg it is another
End is rotationally and slidably connected to the front end of car bottom.Main elevating ram 212 is equipped between front leg strut and rear support leg, it is main
The cylinder body of elevating ram 212 is rotatably connected to the lower half of front leg strut, and cylinder rod is rotatably connected to the upper half of rear support leg
Portion.In other embodiments, crotch component also can refer to the other structures design of existing lifting crotch, not with this embodiment party
Formula is limited.
As shown in figure 3, in the present embodiment, most of structure of hydraulic system can refer to the hydraulic pressure of existing lifting crotch
The related system of system designs.Specifically, hydraulic system utilizes the chassis hydraulic power being mounted on inflight meal vehicle carriage
Unit 240 provides power, and via system main line 210 and each system branch to each oil cylinder fuel feeding, to control the work of each oil cylinder
State.Wherein, system main line 210 and each system branch are parallel with one another, and system branch includes mainly 220 He of transversal stretching branch
Lift branch 230.System main line 210 is used for 212 fuel feeding of main elevating ram, and transversal stretching branch 220 is for front leg strut to the left
Transversal stretching oil cylinder 221, left back supporting leg transversal stretching oil cylinder 222, right anterior branch leg transversal stretching oil cylinder 223 and right rear support leg are lateral
224 fuel feeding of telescopic oil cylinder, before lifting branch 230 is for front leg strut elevating ram 231 to the left, left back supporting leg lifting oil cylinder 232, the right side
Supporting leg lifting oil cylinder 233 and right 234 fuel feeding of rear support leg elevating ram.In other embodiments, the above structure of hydraulic system
Also the other systems design that can refer to the hydraulic system of existing lifting crotch, is not limited with present embodiment.
As shown in figure 3, in the present embodiment, system main line 210 is equipped with proportional reversing valve 211, and controller is connected to
Proportional reversing valve 211, to control input proportional reversing valve 211 proportion electro-magnet electric current current value.Specifically, control
Device processed can provide the electricity of corresponding current value to proportion electro-magnet according to multiple height sections in lifting 100 stroke of crotch
Stream to control the hydraulic flow of supply each oil cylinder of hydraulic system (such as main elevating ram 212), and then controls lifting crotch
100 lift the speed risen or fallen in compartment.
Further, in the present embodiment, lifting multiple height sections in 100 stroke of crotch can include at least by height
To low high-order section, steady section and low level section.Specifically, high-order section is compartment rise to it is high-order and under preparing
The elemental height range of shake is easy to happen when drop, steady section is altitude range when compartment steadily declines, low level section
Altitude range when as compartment drops to low level.Wherein, lifting crotch 100 is in high-order section, steady section and low level area
Between when, the current value of the electric current that controller is provided to proportion electro-magnet is respectively the first current value, the second current value and third electricity
Flow valuve, also, third current value is more than the first current value and is less than the second current value.
By above-mentioned design, when the lifting lifting of crotch 100 compartment rises to a high position and prepares to decline, in high-order section
Easy to produce jitter phenomenon.At this point, the electric current that controller is provided to the proportion electro-magnet of proportional reversing valve 211 is smaller first
Current value, the valve port to control proportional reversing valve 211 turn down (i.e. fraction open), make compartment in high-order section at a slow speed under
Drop generates jitter phenomenon to avoid compartment.When compartment is dropped to steady section by lifting crotch 100, controller is changed to ratio
The electric current provided to the proportion electro-magnet of valve 211 is the second larger current value, to which the valve port for controlling proportional reversing valve 211 is complete
(or aperture is larger) is opened, compartment rapid decrease in steady section is made, ensures that compartment declines efficiency.When lifting crotch 100 is by vehicle
When compartment drops to low level section, the electric current that controller is provided to the proportion electro-magnet of proportional reversing valve 211 is that smaller third is electric
Flow valuve makes compartment descending at slow speed in low level section, to avoid to which the valve port for controlling proportional reversing valve 211 is substantially half-open
Fortuitous event, and ensure to operate the safety of maintenance personal.
From the above, multiple height sections that controller can be according to lifting crotch 100 in its stroke, commutate to ratio
The proportion electro-magnet of valve 211 provides the electric current of corresponding current value, to control the valve port opening of proportional reversing valve 211, that is, controls
The hydraulic flow for supplying the system main line 210 of hydraulic system, to control different height area of the lifting crotch 100 in its stroke
It is interior that compartment lifting is lifted with corresponding speed.In other embodiments, multiple and different height in 100 stroke of crotch are lifted
Degree section is not limited to the above-mentioned height section in present embodiment, can be according to the practical need for lifting compartment to lifting crotch 100
Seek flexible definition.Furthermore the current value of the electric current corresponding to different height section can accordingly be adjusted according to the demand to lifting speed
It is whole, it is not limited with present embodiment.
Further, in the present embodiment, when main elevating ram 212, using twin-stage lifting hydraulic cylinder 140, this is existing
When lifting the common type selecting of crotch, multiple height sections in lifting 100 stroke of crotch, which at least may also include, changes a grade section, i.e., double
First-stage cylinder 141 and the secondary cylinder 142 of grade lifting hydraulic cylinder 140 height section corresponding when changing grade.Wherein, when lifting crotch
100 in it is above-mentioned change grade section when, the current value of the electric current that controller is provided to the proportion electro-magnet of proportional reversing valve 211 can be with
For the first current value.By above-mentioned design, when compartment is dropped to the first-stage cylinder of twin-stage lifting hydraulic cylinder 140 by lifting crotch 100
When 141 height section corresponding when being changed grade with secondary cylinder 142, babinet will produce apparent jitter phenomenon.At this point, controller to
The electric current that the proportion electro-magnet of proportional reversing valve 211 provides is the first smaller current value, to control proportional reversing valve 211
Valve port turns down (i.e. fraction is opened), so that compartment is being changed descending at slow speed in grade section, to alleviate the jitter phenomenon in compartment.
Wherein, according to the concrete structure of lifting crotch 100 and twin-stage lifting hydraulic cylinder 140, above-mentioned grade section of changing can be with
Between high-order section and steady section or can between steady section and low level section, also may be included in steady section
Within.When changing grade section within steady section, steady section then further comprises the first steady section and second steadily
Section, and the height for changing grade section is less than the first steady section and is more than the second steady section.
Further, in the present embodiment, when lifting crotch 100 lifts compartment and is still in a height, and lifting fork
When frame 100 declines automatically, controller can control hydraulic system driving lifting crotch 100 to go up to former height, and the rise process
The current value for the electric current that middle controller is provided to the proportion electro-magnet of proportional reversing valve 211 is preferably the first current value.It is specific and
Speech, in conjunction with the application environment in relation to inflight meal vehicle in present embodiment, said circumstances may particularly include when compartment is in certain
When highly and four-way platform is in stretching state, compartment slowly declines automatically caused by the leakage of main elevating ram 212
The phenomenon that.
Further, in the present embodiment, controller can be preferably PLC controller.
As shown in Figure 1, in the present embodiment, lift and be additionally provided with rotation angle encoder 130 in the shaft of crotch 100,
The angle that crotch to detect lifting crotch 100 rotates.Wherein, controller is connected to rotation angle encoder 130, with basis
The residing height of lifting crotch 100 is calculated, to compare out present level category in the angle that rotation angle encoder 130 measures
Which kind of (such as high-order section in present embodiment, the first steady section, changed in the height section being pre-set in controller
Grade section, the second steady section, low level section) in, and then for controller according to different height sections to proportional reversing valve 211
Proportion electro-magnet provide corresponding current value (such as the first current value, the second current value, third electric current in present embodiment
Value) electric current.In other embodiments, the rotation angle that other elements or mode substitute in present embodiment also can be used to compile
Code device 130, the angle that the crotch to detect lifting crotch 100 rotates, to which the residing height of lifting crotch 100 be calculated,
Or the residing height of lifting crotch 100 is directly detected using other elements or mode, it is not limited with present embodiment.
Furthermore, it is contemplated that lifting crotch 100 is influenced in real operating environments by various factors, then above-mentioned each height area
Between actually exist certain variation.Therefore, in the present embodiment, can be worked lifting crotch 100 by related elements
The detection of shake in the process makes controller judge which kind of height section lifting crotch 100 is in, to provide corresponding current value
Electric current.For example, the angle change rate of lifting crotch 100 is also detected using rotation angle encoder 130, to mutually accrued
Calculate whether lifting crotch 100 (compartment) occurs the exact level shaken or shaken.
Specifically, in steady section, under normal circumstances, it is that not will produce to tremble that lifting crotch 100, which lifts compartment lifting,
Dynamic phenomenon, i.e., the angular speed (being changed by the corner that rotation angle encoder 130 detects in the unit interval) of shaft is at one section
Between be that either gradual (lasting to increase or persistently become smaller, such situation is mainly ratio commutation to fixed value in (such as 3~4s)
Valve 211 receives the transient process that electric signal back valve core is gradually switched to another location from a certain position).When generation jitter phenomenon
When, the angular speed of shaft is that frequent fluctuation changes whithin a period of time, by detecting this time (such as 3~4s) interior shaft
Angular speed be less than 0.015rad/s (magnitude of angular velocity is only for reference, can be required according to the decrease speed in different types of compartment
The magnitude of angular velocity is adjusted flexibly) number, when more than certain number (such as 3 times) i.e. it is believed that compartment decline generate shake
Phenomenon.If there are jitter conditions, controllers to export the electric current of the first current value (or second current value) for judging result, control is changed
It is turned down to valve valve port, continues to shake when compartment being avoided to decline.The current duration that controller exports the first current value is more than 5s
Afterwards, the current value of controller output current is increased to the second current value, controls the valve port standard-sized sheet of proportional reversing valve 211, and compartment is fast
Speed declines.In addition, for " high-order section → steady section " (or " the first steady section → change the meadow of a grade section → second
Between ") and " steady section → low level section " two decline processes, it can believe further combined with the correlation of height and position residing for compartment
Breath is judged.
Illustrated based on above-mentioned example, the control principle of lifting crotch proposed by the present invention can refer to shown in Fig. 4.Wherein,
For rotation angle encoder to PLC controller input angle signal, PLC controller can learn the crotch angle of lifting crotch with this
Degree is further able to obtain height and position residing for corresponding compartment according to crotch angle calculation, while can be according to crotch angle
The angular speed of lifting crotch is calculated in degree.It holds, when operator presses next inching button, inching button is to PLC controller
Input micro-positioning regulators signal.PLC controller is according to the different motion state or height and position that crotch is presently in is lifted, to ratio
The proportion electro-magnet of reversal valve provides the electric current of corresponding current value, to control valve port opening (such as the small portion of proportional reversing valve
Separately open, half-open or standard-sized sheet), and then control the lifting speed of lifting crotch.
It should be noted here that being shown in attached drawing and the lifting crotch that describes in the present specification is only can use this hair
An example in many kinds of lifting crotch of bright principle.It should be clearly understood that the principle of the present invention is only limitted to absolutely not attached drawing
In show or it is described in this specification lifting crotch any details or lift crotch any part.
Inflight meal vehicle embodiment
In the present embodiment, inflight meal vehicle proposed by the present invention is to be with the inflight meal vehicle suitable for A380 aircrafts
What example illustrated.It will be readily appreciated by those skilled in the art that for the design of the inflight meal vehicle is applied to be applicable in other
In the inflight meal vehicle or other kinds of vehicle arrangement of model aircraft, and a variety of change is made to following specific implementation modes
Type, addition, replacement, deletion or other variations, these variations are still in the range of the principle of inflight meal vehicle proposed by the present invention.
In the present embodiment, inflight meal car owner proposed by the present invention will include that vehicle frame, compartment and the present invention propose
Lifting crotch.
Further, in the present embodiment, which further includes four-way platform.Specifically, compartment is arranged
On four-way platform, lifting fork frame is arranged between vehicle frame and four-way platform, and is provided with detection switch on four-way platform.Its
In, controller is connected with detection switch, is opened when compartment rises and butts up against an aircraft and aircraft and drops to detection with respect to compartment
When the height of pass, detection switch triggering, controller control lifting descending of fork, and the electric current that controller is provided to proportion electro-magnet
Current value be the first current value, i.e. the valve port fraction of proportional reversing valve is opened, and control compartment descending at slow speed is to four-way platform
Height identical as cabin door, to realize the decline fine tuning of height of wagon.
Further, in the present embodiment, based on multiple height sections in lifting crotch stroke include high-order section,
A grade section, the second steady section and low level section, and the electric current that controller is provided to proportion electro-magnet are changed in first steady section
Current value be respectively corresponding first current value, the second current value and third current value design, in conjunction with the cabin of A380 aircrafts
The parameters such as parameters and the specific works height of inflight meal vehicle suitable for A380 aircrafts such as door height, above-mentioned high position section can be situated between
In 6.8m~8.1m, the first steady section can be between 5.5m~6.8m, and changing grade section can be between 5.3m~5.5m, the second meadow
Between can be between 3.4m or less between 3.4m~5.3m, low level section.Also, the first current value can between 0.2A~0.4A,
Two current values can be between 0.5A~0.6A between 0.9A~1A, third current value.Furthermore it is above-mentioned to hydraulic leak caused by
The compartment slowly reply action of decline phenomenon automatically can be controller when the automatic falling head in compartment is more than 0.1m~0.2m
It makes.
It should be noted that the specific value of the specific altitude range and each current value in above-mentioned each height section, it can basis
Different types of application environment (such as aircraft type, inflight meal bassinet structure) is adjusted flexibly, and is not limited with present embodiment.
It should be noted here that being shown in attached drawing and the inflight meal vehicle that describes in the present specification is only can use this
An example in many kinds of inflight meal vehicles of inventive principle.It should be clearly understood that the principle of the present invention is only limitted to absolutely not
It is shown in attached drawing or any part of any details of inflight meal vehicle described in this specification or inflight meal vehicle.
In conclusion lifting crotch proposed by the present invention and inflight meal vehicle, ratio is provided by using controller adjusting
Control of the controller according to different height to lifting speed is realized in the design of the size of current of the proportion electro-magnet of throttle valve.It is logical
Above-mentioned design is crossed, the present invention can make the speed gentle transition during carriage movements, avoid cargo damage in compartment, and improve
The comfort level of staff in compartment.Also, the present invention can be directed to lifting crotch existing shake and speed during the motion
The problems such as degree is uneven, is adjusted flexibly the movement velocity of crotch.
It is described in detail above and/or illustrate it is proposed by the present invention lifting crotch and with the lifting crotch aviation food
The illustrative embodiments of product vehicle.But embodiments of the present invention are not limited to particular implementation as described herein, on the contrary, often
The component part and/or step of a embodiment can be independent with other component parts as described herein and/or step and be separated
It uses.Each component part of one embodiment and/or each step also can be with other component parts of other embodiment
And/or step is used in combination.Introduce it is described here and/or diagram element/component part/wait whens, term "one",
" one " and " above-mentioned " etc. to indicate there are one or more elements/component part/etc..Term "comprising", " comprising " and " tool
Have " it can also be deposited other than waiting to indicate the open meaning being included and refer to element/component part/in addition to listing
Other element/component part/etc..In addition, the term " first " and " second " etc. in claims and specification are only made
It is used for label, is not the numerical limit to its object.
Although according to different specific embodiments to lifting crotch proposed by the present invention and boat with the lifting crotch
Empty food car is described, but it will be recognized by those skilled in the art can be in the spirit and scope of the claims to this hair
Bright implementation is modified.
Claims (10)
1. a kind of lifting crotch, it is set between the vehicle frame and compartment of lorry, the lifting crotch includes crotch component, described in driving
The hydraulic system of crotch component lifting and the controller of the control hydraulic system；It is characterized in that, the hydraulic system
System main line is equipped with proportional reversing valve, and the controller is connected to the proportional reversing valve, to control the input ratio
The current value of the electric current of the proportion electro-magnet of reversal valve；Wherein, the controller is according to multiple in the lifting crotch stroke
Height section, the electric current of corresponding current value is provided to the proportion electro-magnet, to control the liquid for supplying the hydraulic system
Flow is pressed, and then controls the speed risen or fallen that the lifting fork frame torr lifts the compartment.
2. lifting crotch according to claim 1, which is characterized in that multiple height in the lifting crotch stroke
Section includes at least high-order section, steady section and low level section from high to low；Wherein, the lifting crotch is in the height
When position section, steady section and low level section, the current value difference for the electric current that the controller is provided to the proportion electro-magnet
For the first current value, the second current value and third current value, the third current value is more than first current value and is less than institute
State the second current value.
3. lifting crotch according to claim 2, which is characterized in that the lifting assembly includes twin-stage lifting hydraulic cylinder,
Multiple height sections in the lifting crotch stroke, which further include first-stage cylinder, changes a grade section when being changed grade with secondary cylinder；Its
In, the lifting crotch is in described when changing grade section, the electric current for the electric current that the controller is provided to the proportion electro-magnet
Value is first current value.
4. lifting crotch according to claim 3, which is characterized in that grade section of changing is between the high-order section and institute
It states between steady section；Alternatively, grade section of changing is between the steady section and the low level section；Alternatively, described
A grade section to be changed to be contained within the steady section, the steady section includes the first steady section and the second steady section, and
The height for changing grade section is less than the described first steady section and is more than the described second steady section.
5. lifting crotch according to claim 2, which is characterized in that the lifting crotch rises and is still in a height,
And the lifting crotch, when declining automatically, the controller controls the hydraulic system and the lifting crotch is driven to go up to former height
Degree, and the current value for the electric current that the controller is provided to the proportion electro-magnet during the rise is first electric current
Value.
6. lifting crotch according to claim 1, which is characterized in that the controller is PLC controller.
7. lifting crotch according to claim 1~6 any one of them, which is characterized in that set in the shaft of the lifting crotch
There is rotation angle encoder, the angle that the crotch to detect the lifting crotch rotates；Wherein, the controller is connected to institute
Rotation angle encoder is stated, to obtain the height section residing for the lifting crotch according to the angle calculation.
8. a kind of inflight meal vehicle, including vehicle frame and compartment；It is characterized in that, the inflight meal vehicle further includes：
If claim 1~7 any one of them lifts crotch, the lifting fork be set up in the vehicle frame and the compartment it
Between.
9. inflight meal vehicle according to claim 8, which is characterized in that the inflight meal vehicle further includes four-way platform,
The four-way platform is set to the compartment close to that one end of aircraft door, and the four-way platform is equipped with detection switch；Wherein,
The controller is connected to the detection switch, and the lifting fork is detected using a rotary encoder when lifting crotch lifts
The crotch angle of frame, and by controller calculate and learn that height and position residing for the compartment, the compartment rise and dock
When an aircraft and the relatively described compartment of the aircraft drop to the height of the detection switch, the detection switch triggering, institute
It states controller and controls the lifting descending of fork, and the current value of electric current that the controller is provided to the proportion electro-magnet is
First current value.
10. inflight meal vehicle according to claim 8, which is characterized in that multiple described in the lifting crotch stroke
Height section includes the high-order section, the first steady section, described changes a grade section, the second steady section and described
Low level section, and the current value of electric current that the controller is provided to the proportion electro-magnet is respectively the first current value, second
When current value and third current value,
The high position section is situated between 6.8m~8.1m, the first steady section between 5.5m~6.8m, grade section of changing
In 5.3m~5.5m, the second steady section is between 3.4m~5.3m, and the low level section is between 3.4m or less；And/or
First current value is situated between 0.2A~0.4A, second current value between 0.9A~1A, the third current value
In 0.5A~0.6A.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711433518.4A CN108569640B (en) | 2017-12-26 | 2017-12-26 | Lifting fork frame and aviation food vehicle with same |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711433518.4A CN108569640B (en) | 2017-12-26 | 2017-12-26 | Lifting fork frame and aviation food vehicle with same |
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| CN108569640A true CN108569640A (en) | 2018-09-25 |
| CN108569640B CN108569640B (en) | 2020-05-12 |
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| CN201711433518.4A Active CN108569640B (en) | 2017-12-26 | 2017-12-26 | Lifting fork frame and aviation food vehicle with same |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111114818A (en) * | 2020-02-12 | 2020-05-08 | 民航协发机场设备有限公司 | Height adjusting device and aviation food vehicle with same |
| CN112032125A (en) * | 2020-05-14 | 2020-12-04 | 廊坊中集空港设备有限公司 | Hydraulic system and aviation food car |
| CN114294273A (en) * | 2021-12-31 | 2022-04-08 | 江苏徐工工程机械研究院有限公司 | Hydraulic control system, tractor and hydraulic control method |
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| Publication number | Publication date |
|---|---|
| CN108569640B (en) | 2020-05-12 |
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Effective date of registration: 20210621 Address after: 102206 b4061, building 8, No. 97, Changping Road, Shahe Town, Changping District, Beijing (Changping Demonstration Park) Patentee after: XINFA AIRPORT EQUIPMENT Ltd. Patentee after: LANGFANG CIMC AIRPORT EQUIPMENT Co.,Ltd. Address before: 518067 CIMC R & D center, No. 2 Harbour Road, Shekou Industrial Zone, Guangdong, Shenzhen Patentee before: China International Marine Containers (Group) Co.,Ltd. Patentee before: XINFA AIRPORT EQUIPMENT Ltd. Patentee before: CIMC TIANDA HOLDING (SHENZHEN) Ltd. |