CN212386713U

CN212386713U - Aviation food vehicle

Info

Publication number: CN212386713U
Application number: CN202021089070.6U
Authority: CN
Inventors: 何春栋; 王少虎
Original assignee: China International Marine Containers Group Co Ltd; Shenzhen CIMC Tianda Airport Support Ltd; Xinfa Airport Equipment Ltd; Langfang CIMC Airport Support Ltd
Current assignee: Shenzhen CIMC Tianda Airport Support Ltd; Xinfa Airport Equipment Ltd; Langfang CIMC Airport Support Ltd
Priority date: 2020-06-12
Filing date: 2020-06-12
Publication date: 2021-01-22
Anticipated expiration: 2030-06-12

Abstract

The utility model provides an aviation food car, aviation food car contain many to the flexible switch that targets in place of landing leg hydro-cylinder and multiunit. The multiple groups of telescopic in-place switches are respectively connected to the multiple pairs of supporting leg oil cylinders, and each group of telescopic in-place switches comprises supporting leg extending in-place switches. Therefore, when the support leg stretching-in-place switch is opened, the support leg oil cylinder can be limited to stretch out by a first stroke, and when the support leg stretching-in-place switch is closed, the support leg oil cylinder can continue to stretch out by a second stroke. Through the above design, the utility model provides an aviation food car can utilize above-mentioned design to realize from loading and unloading function, and it is big to have solved required space when current aviation food car hoists, and the problem that the lease expense is high has improved the efficiency of loading and unloading, has reduced the vehicle loading and unloading cost, can carry out from loading and unloading in finite space.

Description

Aviation food vehicle

Technical Field

The utility model relates to an airport special vehicle technical field especially relates to an aviation food car.

Background

The aviation food vehicle belongs to a special vehicle for an airport and is specially used for catering of a passenger plane. The aviation food vehicle is generally formed by modifying a second type of chassis, and an auxiliary frame, a lifting fork frame, a heat-insulation compartment body, a four-way platform, a hydraulic system, an electric control system, emergency control and the like are added on the basis of the chassis, and the aviation food vehicle can also be modified on the basis of a self-made chassis.

The aviation food vehicle belongs to airport special equipment, and after being delivered to customers, the customers apply for and install special license plates. After the aviation food vehicle is off-line from a manufacturer, the aviation food vehicle is not allowed to directly run on a road due to no license plate, and is transported by a special flat car and delivered to a customer. The carriage of the common flat car is higher (for example, 1.2m) from the ground, and the food car is placed on the flat car after being lifted by a crane and a special lifting tool. The method for hoisting and loading and unloading the aviation food vehicle by the crane has the problems of large working space and high lease cost. Due to the limitation of the approach angle and the departure angle of the aviation food vehicle, the design of the slope type transition platform food loading and unloading vehicle is difficult to realize in practical application due to the fact that the required slope length is large, the structural strength requirement is high, and the vehicle is required to be convenient to move.

SUMMERY OF THE UTILITY MODEL

The utility model discloses a main aim at overcomes above-mentioned prior art's at least defect, provides the aviation food car of the function of unloading from loading that can realize relative flatbed.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

according to an aspect of the utility model, provide an aviation food car. The aviation food vehicle comprises a vehicle body, a traveling mechanism, a plurality of pairs of supporting leg oil cylinders, a hydraulic control system and a plurality of groups of telescopic in-place switches. The running mechanism is arranged at the bottom of the vehicle body and comprises a front axle and a rear axle. The plurality of pairs of supporting leg oil cylinders are respectively arranged at the bottom of the vehicle body and are configured to lift the vehicle body. The hydraulic control system is connected to the plurality of pairs of support oil cylinders to control the support oil cylinders and provide hydraulic power. The flexible switch that targets in place of multiunit connect respectively in many to the landing leg hydro-cylinder, every group flexible switch that targets in place contains the landing leg and stretches out the switch that targets in place, when the landing leg stretches out the switch that targets in place and opens, it is configured as when the landing leg hydro-cylinder stretches out a first stroke, through hydraulic control system control the landing leg hydro-cylinder stops stretching out, when the landing leg stretches out the switch that targets in place and closes, the landing leg hydro-cylinder can continue to stretch out to a second stroke after stretching out first stroke. When the supporting leg oil cylinder extends to a first stroke, the vehicle body is jacked by the supporting leg oil cylinder to have a first ground clearance, and when the supporting leg oil cylinder extends to a second stroke, the vehicle body is jacked by the supporting leg oil cylinder to have a second ground clearance.

According to the utility model discloses an one of them embodiment, the landing leg hydro-cylinder is multistage hydro-cylinder, the aviation food car contains two pairs landing leg hydro-cylinder and two sets of flexible switch that targets in place, one of them of two pairs of landing leg hydro-cylinders is located the front axle with between the rear axle, wherein another is located the rear axle rear side. And/or the aviation food cart comprises two pairs of supporting leg oil cylinders and two groups of telescopic in-place switches, wherein one of the two pairs of supporting leg oil cylinders is positioned between the front axle and the rear axle, and the other supporting leg oil cylinder is positioned on the front side of the front axle.

According to the utility model discloses a one of them embodiment, the landing leg hydro-cylinder is multistage hydro-cylinder, multistage hydro-cylinder contains at least two-stage. When the first stage of the multi-stage oil cylinder extends out, the supporting leg oil cylinder extends out for a first stroke, and when the two stages of the multi-stage oil cylinder extend out, the supporting leg oil cylinder extends out for a second stroke.

According to one of the embodiments of the present invention, the hydraulic control system includes a hydraulic source module, a plurality of control valves, and a control module. The control valves are respectively connected with the hydraulic source module through main oil supply pipelines, and the control valves are respectively connected with the supporting leg oil cylinders through sub oil supply pipelines. The control module is connected with the control valves and the groups of telescopic in-place switches. The control module is configured to control the plurality of pairs of supporting leg oil cylinders through the plurality of control valves respectively, so that the plurality of pairs of supporting leg oil cylinders can lift independently and synchronously lift two supporting leg oil cylinders in the same pair.

According to one embodiment of the present invention, each of the set of the retractable in-place switches includes one of the support legs extending out of the in-place switch. And each support leg extending-to-position switch is respectively connected with one of the pair of support leg oil cylinders connected with the support leg extending-to-position switch.

According to the utility model discloses an one of them embodiment, the aviation food car contains two pairs landing leg hydro-cylinder and two sets of flexible switch that targets in place, two pairs of landing leg hydro-cylinders contain a pair of preceding landing leg hydro-cylinder and a pair of back landing leg hydro-cylinder that arrange around on the length direction of aviation food car, a pair of preceding landing leg hydro-cylinder contains preceding landing leg hydro-cylinder in a left side and preceding landing leg hydro-cylinder in a right side, a pair of back landing leg hydro-cylinder contains back landing leg hydro-cylinder in a left side and back landing leg hydro-cylinder in a right. The two landing legs extend in-place switches to be connected to the left front landing leg oil cylinder and the right rear landing leg oil cylinder respectively, or the two landing legs extend in-place switches to be connected to the right front landing leg oil cylinder and the left rear landing leg oil cylinder respectively.

According to the utility model discloses a one of them embodiment, hydraulic pressure source module contains oil tank and oil pump. The oil tank is connected to the plurality of control valves through the main oil supply line. The oil pump is arranged on the main oil supply pipeline to provide oil supply power.

According to the utility model discloses a wherein one of them embodiment, every group the flexible switch that targets in place still contains the landing leg and retracts the switch that targets in place, the landing leg retract the switch that targets in place connect in the landing leg hydro-cylinder. When the support leg retracting-to-position switch is turned on, the support leg retracting-to-position switch is configured to control the support leg oil cylinder to stop retracting through the hydraulic control system when the support leg oil cylinder retracts to the position.

According to one embodiment of the present invention, the aerial food cart can be carried by a platform of a flat bed transport cart. Wherein the second ground clearance height is greater than or equal to a height of a cabin surface of the flat transport vehicle.

According to one embodiment of the present invention, the second height from the ground is 0.9m to 1.5 m.

According to the above technical scheme, the utility model provides an aviation food car's advantage lies in with positive effect:

the utility model provides an aviation food car contains many to the flexible switch that targets in place of landing leg hydro-cylinder and multiunit. The multiple groups of telescopic in-place switches are respectively connected to the multiple pairs of supporting leg oil cylinders, and each group of telescopic in-place switches comprises supporting leg extending in-place switches. Therefore, when the support leg stretching-in-place switch is opened, the support leg oil cylinder can be limited to stretch out by a first stroke, and when the support leg stretching-in-place switch is closed, the support leg oil cylinder can continue to stretch out by a second stroke. Through the above design, the utility model provides an aviation food car can utilize above-mentioned design to realize from loading and unloading function, and it is big to have solved required space when current aviation food car hoists, and the problem that the lease expense is high has improved the efficiency of loading and unloading, has reduced the vehicle loading and unloading cost, can carry out from loading and unloading in finite space.

Drawings

The various objects, features and advantages of the present invention will become more apparent from the following detailed description of the preferred embodiments of the invention, when considered in conjunction with the accompanying drawings. The drawings are merely exemplary of the invention and are not necessarily drawn to scale. In the drawings, like reference characters designate the same or similar parts throughout the different views. Wherein:

FIG. 1 is a system diagram illustrating a hydraulic control system of an aerial food vehicle according to an exemplary embodiment;

fig. 2 to 5 are schematic views of the self-loading and self-unloading process of the aviation food cart provided by the present invention.

The reference numerals are explained below:

100. an aerial food cart;

110. a vehicle body;

121. a front wheel;

122. a rear wheel;

131. a left front leg cylinder;

132. a right front leg cylinder;

133. a left rear leg cylinder;

134. a right rear leg cylinder;

1411. an oil tank;

1412. an oil pump;

142. a control valve;

143. a main oil supply line;

144. a sub oil supply line;

210. a compartment floor;

SW1. the support leg extends out of the position switch;

SW2. the leg is retracted to the position switch;

SW3. the support leg extends out of the position switch;

SW4. the legs retract to the position switch.

Detailed Description

Exemplary embodiments that embody features and advantages of the invention are described in detail below. It is to be understood that the invention is capable of other and different embodiments and its several details are capable of modification without departing from the scope of the invention, and that the description and drawings are to be regarded as illustrative in nature and not as restrictive.

In the following description of various exemplary embodiments of the invention, reference is made to the accompanying drawings, which form a part hereof, and in which are shown by way of illustration various exemplary structures, systems, and steps in which aspects of the invention may be practiced. It is to be understood that other specific arrangements of parts, structures, example devices, systems, and steps may be utilized, and structural and functional modifications may be made without departing from the scope of the present invention. Moreover, although the terms "over," "between," "within," and the like may be used in this specification to describe various example features and elements of the invention, these terms are used herein for convenience only, e.g., in accordance with the orientation of the examples described in the figures. Nothing in this specification should be construed as requiring a specific three dimensional orientation of structures to fall within the scope of the invention.

Referring to fig. 1, a system diagram of a hydraulic control system for an aircraft food cart according to the present invention is representatively illustrated. In this exemplary embodiment, the present invention is described by taking as an example an aviation food cart that needs to be shipped and delivered by being loaded and unloaded to and from a flat car. Those skilled in the art will readily appreciate that various modifications, additions, substitutions, deletions, or other changes may be made to the specific embodiments described below in order to apply the inventive related designs to other types of aerial food vehicles or other vehicles, and such changes are within the scope of the principles of the present invention.

As shown in fig. 1, in the present embodiment, the utility model provides an aviation food cart 100 includes a cart body 110, a traveling mechanism, two pairs of landing leg cylinders, a hydraulic control system, and two sets of switches that reach the target position. Referring to fig. 2-5, fig. 2-5 are schematic diagrams of a process of self-loading and self-unloading an aircraft food cart 100 onto a flat bed cart, respectively, that can embody principles of the present disclosure. The structure, connection and functional relationship of the main components of the aviation food cart 100 according to the present invention will be described in detail with reference to the above drawings.

As shown in fig. 1 and 2, in the present embodiment, the traveling mechanism is provided at the bottom of the vehicle body 110 and includes a front axle provided with front wheels 121 and a rear axle provided with rear wheels 122. The two pairs of supporting leg oil cylinders are respectively arranged at the bottom of the vehicle body 110 and can lift the vehicle body 110, one pair of the two pairs of supporting leg oil cylinders is positioned between the front axle and the rear axle, and the other pair of the two pairs of supporting leg oil cylinders is positioned at the rear side of the rear axle. The hydraulic control system is connected to the two pairs of support oil cylinders to control the support oil cylinders and provide hydraulic power. Two groups of telescopic in-place switches are respectively connected with the two pairs of supporting leg oil cylinders, and each group of telescopic in-place switches comprises supporting leg extending in-place switches SW1 and SW3. Accordingly, when the leg extension position switch SW1 and SW3 are turned on, the leg extension position switch can control the leg cylinder to stop extending through the hydraulic control system when the leg cylinder extends for a first stroke. When the leg extension in-position switches SW1 and SW3 are closed, the limitation on the extension stroke of the leg oil cylinder is failed, and the leg oil cylinder can continue to extend to a second stroke after extending out of the first stroke. On the basis, when the supporting leg oil cylinder extends to the first stroke, the vehicle body 110 is jacked by the supporting leg oil cylinder to have a first ground clearance, and when the supporting leg oil cylinder extends to the second stroke, the vehicle body 110 is jacked by the supporting leg oil cylinder to have a second ground clearance. Through the design, the utility model provides an aviation food car 100 can utilize above-mentioned design to realize from loading and unloading function, and it is big to have solved required space when current aviation food car 100 hoists, and the problem that the lease expense is high has improved the efficiency of loading and unloading, has reduced the vehicle loading and unloading cost, can carry out from loading and unloading in finite space.

It should be noted that, in the present embodiment, with the above design, the leg cylinder can operate in two modes. Specifically, one mode is a support mode (or may correspond to a normal running mode of the aircraft food vehicle 100), in which the leg extension in-place switches SW1 and SW3 are turned on, the leg extension in-place switches SW1 and SW3 are triggered after the leg cylinders extend for a first stroke to stop extending, the leg cylinders assist in supporting the aircraft food vehicle 100, and the aircraft food vehicle 100 can run normally at this time or perform food conveying work such as carriage lifting. The other mode is a self-loading and unloading mode, in which the switch leg extension in-place switches SW1 and SW3 are closed, the extension stroke limiting function is disabled, and the leg oil cylinder can continue to extend after extending to the first stroke, so that the ground clearance of the food or drink cart can reach the loading and unloading height. Additionally, the utility model discloses can also realize controlling 100 two pairs of landing leg hydro-cylinders of aviation food car and stretch out different stroke height respectively to make aviation food car 100 incline at vehicle length direction, be convenient for better loading and unloading.

Preferably, in the present embodiment, the leg cylinder may preferably be a multi-stage cylinder, that is, the leg cylinder includes at least two stages. On the basis, when one stage of the multi-stage oil cylinder extends out, the supporting leg oil cylinder extends out for a first stroke, and when two stages of the multi-stage oil cylinder extend out, the supporting leg oil cylinder extends out for a second stroke. In other embodiments, the support cylinder may also be a multi-stage cylinder including more than two stages, or may be another cylinder forming an adjustable single-stage cylinder or another structural form, and is not limited to this embodiment.

Preferably, as shown in fig. 1, in the present embodiment, the hydraulic control system may preferably include a hydraulic pressure source module, two control valves 142, and a control module. Specifically, the two control valves 142 are connected to the hydraulic source module through main oil supply lines 143, respectively, and the two control valves 142 are connected to the two pairs of leg cylinders through sub oil supply lines 144, respectively. The control module is connected to two control valves 142 and two sets of telescoping in-place switches. On this basis, the control module can control the two pairs of supporting leg oil cylinders respectively through the two control valves 142, so that the two pairs of supporting leg oil cylinders respectively and independently lift, and the two supporting leg oil cylinders in the same pair synchronously lift.

Further, as shown in fig. 1, based on the design that two pairs of leg cylinders respectively lift independently and lift synchronously with two leg cylinders of the same pair, in the present embodiment, each set of telescoping reach switches may preferably include one leg reach switch SW1, SW3, that is, the aviation food cart 100 includes two leg reach switches SW1, SW3. The leg extension in-place switch SW1 is connected to one of the pair of leg cylinders, and when the leg extension in-place switch SW1 is turned on, the synchronous lifting action of the pair of leg cylinders can be limited by the hydraulic control system according to the extension stroke of one leg cylinder. Similarly, the other leg extension position switch SW3 is connected to one of the other pair of leg cylinders, and when the other leg extension position switch SW3 is turned on, the other pair of leg cylinders can be controlled by the hydraulic control system to synchronously lift according to the extension stroke of the one leg cylinder. In other embodiments, each leg cylinder may also be connected with a leg extending-to-position switch, that is, each group of telescoping-to-position switches includes two leg extending-to-position switches, which is not limited to this embodiment.

Further, as shown in fig. 1 and 2, based on the design that the air food cart 100 includes two leg extension position switches SW1, SW3, in the present embodiment, a pair of leg cylinders located between the front axle and the rear axle is a front leg cylinder, and the pair of front leg cylinders includes a left front leg cylinder 131 and a right front leg cylinder 132 symmetrically arranged along the left and right sides of the cart body 110. The other pair of leg cylinders located at the rear side of the rear axle is a rear leg cylinder including a left rear leg cylinder 133 and a right rear leg cylinder 134 symmetrically arranged along the left and right sides of the vehicle body 110. On this basis, two leg extension position switches SW1, SW3 are connected to the left front leg cylinder 131 and the right rear leg cylinder 134, respectively. In other embodiments, when the aircraft food cart 100 includes two leg extend to position switches SW1, SW3, two leg extend to position switches SW1, SW3 are connected to the right front leg cylinder 132 and the left rear leg cylinder 133, respectively.

Further, as shown in fig. 1, the hydraulic control system based on the aviation food vehicle 100 includes a design of a hydraulic pressure source module, which in the present embodiment may preferably include an oil tank 1411 and an oil pump 1412. Specifically, the oil tank 1411 is connected to the two control valves 142 through the main oil supply line 143. An oil pump 1412 is disposed on the main oil supply line 143 to supply oil power.

Further, based on the design that the hydraulic source module includes the oil tank 1411 and the oil pump 1412, in the present embodiment, the hydraulic source module may also preferably include a backup oil pump. Specifically, the oil tank 1411 or the reserve oil tank is connected to the two control valves 142 through a reserve oil supply line, and the reserve oil pump is provided on the reserve oil supply line.

Preferably, as shown in fig. 1, in the present embodiment, each set of telescoping to position switches may also preferably include leg retract to position switches SW2, SW4, which leg retract to position switches SW2, SW4 are connected to the leg cylinders. Accordingly, when the outrigger retraction position switches SW2 and SW4 are turned on, the hydraulic control system can control the outrigger cylinders to stop retracting when the outrigger cylinders are retracted to the position.

Preferably, as shown in fig. 2 to 5, the aviation food cart 100 of the present invention can be carried by a floor 210 of a flat transport cart. On this basis, the second height above ground may preferably be greater than or equal to the height of the bed floor 210 of the flat transport vehicle.

Further, the second height from the ground may be preferably 0.9m to 1.5m, for example, 0.9m, 1.2m, 1.5m, etc. in the present embodiment, based on the second height from the ground being greater than or equal to the height indicated by the floor 210 of the flat transport vehicle. In other embodiments, the second height from the ground may be less than 0.9m, or may be greater than 1.5m, such as 0.8m, 1.6m, etc., and is not limited to this embodiment.

It should be noted herein that the aerial food carts shown in the drawings and described in this specification are but a few examples of the many types of aerial food carts that can employ the principles of the present invention. It should be clearly understood that the principles of the present invention are in no way limited to any of the details of the aerial food vehicle or any of the components of the aerial food vehicle shown in the drawings or described in this specification.

For example, in another embodiment, when the utility model provides an aviation food cart includes two pairs of landing leg hydro-cylinders, other arrangements can also be adopted to two pairs of landing leg hydro-cylinders, for example, wherein one pair of landing leg hydro-cylinder sets up between front axle and rear axle, wherein another pair of landing leg hydro-cylinder sets up the front side at the front axle.

For another example, in other embodiments, the utility model provides an aviation food car also can contain more than two pairs of landing leg hydro-cylinders, for example three pairs, four pairs equally, and a plurality of pairs of landing leg hydro-cylinders can be preferably along aviation food car length direction front and back interval arrangement. On the basis, the aviation food vehicle can comprise more than two groups of telescopic in-place switches, and each pair of supporting leg oil cylinders is connected with one group of telescopic in-place switches. In addition, the number of other structures or elements corresponding to the number of pairs of the support oil cylinders in the above embodiment can be adjusted accordingly, which is not described herein.

Based on the above detailed description of an exemplary embodiment of the aviation food cart provided by the present invention, the following will describe, with reference to fig. 2 to fig. 5, a loading and unloading method and a loading and unloading process of the aviation food cart provided by the present invention, by taking the aviation food cart 100 in the above embodiment as an example.

As shown in fig. 2 to 5, in the present embodiment, when the aviation food cart 100 of the present invention is loaded on the floor 210 of a flat car, the method specifically includes the following steps:

driving the aviation food vehicle 100 to the tail of the compartment floor 210 of the flat car;

closing two leg reach out to position switches SW1, SW 3;

driving the two pairs of supporting leg oil cylinders to lift the vehicle body 110 to a second ground clearance through a hydraulic control system;

backing up the flatbed vehicle so that the wheels of the front axle of the aero-food vehicle 100 bear on the compartment floor 210;

a pair of supporting leg oil cylinders between the front axle and the rear axle are independently driven to retract through a hydraulic control system;

continuing to reverse the flatbed so that the wheels of the rear axle of the aero-food vehicle 100 bear on the car floor 210; and

and the other pair of supporting leg oil cylinders on the rear side of the rear axle is driven to retract through a hydraulic control system.

Through the design, compared with the existing loading method, the aviation food vehicle 100 loaded by adopting the self-loading and unloading method has the advantages that loading can be realized without using a crane, a slope and a flat car for direct reversing and other actions.

Preferably, in the present embodiment, in the step of driving the food cart 100 to the rear of the floor 210 of the flat car, the food cart 100 may be driven to a position spaced apart from the rear of the floor 210 of the flat car. Further, in the present embodiment, the spacing distance may be preferably 400mm to 600mm, for example, 400mm, 500mm, 600mm, or the like. In other embodiments, the separation distance may also be less than 400mm, or may be greater than 600mm, such as 300mm, 700mm, etc., without being limited to this embodiment.

In addition, when unloading the aviation food cart 100 loaded on the carriage floor 210 of the flat car, the method specifically comprises the following steps:

closing two leg reach out to position switches SW1, SW 3;

backing up the aviation food vehicle 100 loaded on the carriage floor 210, and suspending a pair of leg cylinders positioned at the rear side of the rear axle (namely, the vehicle body 110 is extended from the tail part of the carriage floor 210 in a supplementing way, so that the pair of leg cylinders are not positioned above the carriage floor 210 any more);

a pair of supporting leg oil cylinders at the rear side of the rear axle are driven by a hydraulic control system to extend out and support on the ground;

the flat car is driven forward for a certain distance, so that the rear wheel 122 and the other pair of supporting leg oil cylinders of the aviation food car 100 are suspended;

the other pair of supporting leg oil cylinders are driven by a hydraulic control system to extend out and support on the ground;

then the flat car is driven forwards, so that the front wheel 121 of the aviation food car 100 is suspended, the aviation food car 100 is supported by the two pairs of supporting leg oil cylinders, and the flat car is driven away;

the two pairs of support oil cylinders are driven to retract through a hydraulic control system, so that the aviation food cart 100 descends and is loaded by the front wheels 121 and the rear wheels 122 in contact with the ground.

Based on the above detailed description of the exemplary embodiments of the aircraft food cart 100 and the self-loading and unloading method thereof according to the present invention, a specific flow of the loading operation of the aircraft food cart 100 by the self-loading and unloading method will be described with reference to fig. 1 to 5.

When the aviation food vehicle 100 is driven to a position which is about 500mm away from the tail part of the carriage floor 210 of the flat car in the normal driving mode to stop as shown in figure 2, the aviation food vehicle 100 is hung in the neutral gear and pulls a hand brake and a power takeoff.

As shown in fig. 3, the operation mode control switch causes the aero-food vehicle 100 to be in a self-loading/unloading mode (when the travel switches SW1 and SW3 are disabled), and the operation of the aero-food vehicle 100 is stopped after the operating legs are extended and the entire vehicle is lifted to a height (typically about 1.2m) that is equal to the distance from the floor 210 of the flatbed compartment to the ground. And then starting the flat car to back up to enable the front wheel 121 of the aircraft food car 100 to be in contact with the floor 210 of the carriage of the flat car, wherein at the moment, because the aircraft food car 100 is in a neutral gear state, the front wheel 121 of the aircraft food car 100 is reversed when the flat car backs up until the tail part of the flat car is close to a front supporting leg oil cylinder of the aircraft food car 100 (at the moment, a double-person cooperation operation mode can be adopted, a ground guide person instructs a driver to back up to avoid collision with the front supporting leg oil cylinder when the flat car backs up, and a collision detection element can be arranged on the front side of the.

As shown in fig. 4, the two front leg cylinders of the aero-food vehicle 100 are operated to be fully retracted, and the aero-food vehicle 100 is supported at four points by the two front wheels 121 and the two rear leg cylinders. The flat car is then started to continue reversing, the front wheels 121 of the aero-food vehicle 100 are inverted on the surface of the floor 210 of the flat car body, the rear wheels 122 of the aero-food vehicle 100 gradually reach the height of the floor 210 of the flat car body, the front and rear four tires form a four-point support for the aero-food vehicle 100, and the aero-food vehicle 100 is operated to release the hand brake. When the tail of the carriage floor 210 of the flat car is close to the rear support oil cylinder of the aviation food car 100 (a double-person cooperation operation mode can be adopted at the moment, a ground guide person instructs a driver to back up to avoid collision with the rear support oil cylinder when the flat car backs up, and a collision detection element can be arranged on the front side of the rear support oil cylinder to realize an automatic detection function), and the flat car stops backing up.

As shown in fig. 5, the two rear leg cylinders of the aero-food vehicle 100 are operated to be fully retracted, and the four wheels of the aero-food vehicle 100 are fully supported on the floor 210 of the flatbed. And starting the aviation food vehicle 100 and in a driving mode, and driving the aviation food vehicle 100 to move forward to a proper position by a driver to finish the self-loading of the aviation food vehicle 100.

In addition, based on the above-mentioned self-loading process and method, the self-unloading of the aircraft food cart 100 substantially corresponds to and is opposite to the above-mentioned self-loading process, and is not described herein again.

Based on the aviation food car contains two pairs of landing leg hydro-cylinders, and when a pair of landing leg hydro-cylinders set up between front axle and rear axle, another set of landing leg hydro-cylinder set up when the front side of front axle, the utility model discloses correspondingly put forward another kind from the loading and unloading method, this from the loading and unloading method can load this kind of aviation food car on the carriage floor of a flat car. Specifically, the method comprises the following steps:

backing the aviation food vehicle to the tail part of the carriage floor of the flat car;

closing the two support leg extension in-place switches;

driving the two pairs of supporting leg oil cylinders to lift the vehicle body to a second ground clearance through a hydraulic control system;

backing up the flat car to enable wheels of a rear axle of the aviation food car to be borne on the floor of the carriage;

continuing to back the flat car so that wheels of a front axle of the aviation food car are borne on the carriage floor;

and the other pair of the supporting leg oil cylinders on the front side of the front axle is driven to retract by a hydraulic control system.

To sum up, the utility model provides an aviation food car contains many to the flexible switch that targets in place of landing leg hydro-cylinder and multiunit. The multiple groups of telescopic in-place switches are respectively connected to the multiple pairs of supporting leg oil cylinders, and each group of telescopic in-place switches comprises supporting leg extending in-place switches. Therefore, when the support leg stretching-in-place switch is opened, the support leg oil cylinder can be limited to stretch out by a first stroke, and when the support leg stretching-in-place switch is closed, the support leg oil cylinder can continue to stretch out by a second stroke. Through the above design, the utility model provides an aviation food car can utilize above-mentioned design to realize from loading and unloading function, and it is big to have solved required space when current aviation food car hoists, and the problem that the lease expense is high has improved the efficiency of loading and unloading, has reduced the vehicle loading and unloading cost, can carry out from loading and unloading in finite space.

Exemplary embodiments of an aviation food cart as set forth in the present disclosure are described and/or illustrated in detail above. Embodiments of the invention are not limited to the specific embodiments described herein, but rather, components and/or steps of each embodiment may be utilized independently and separately from other components and/or steps described herein. Each component and/or step of one embodiment can also be used in combination with other components and/or steps of other embodiments. When introducing elements/components/etc. described and/or illustrated herein, the articles "a," "an," and "the" are intended to mean that there are one or more of the elements/components/etc. The terms "comprising," "including," and "having" are intended to be inclusive and mean that there may be additional elements/components/etc. other than the listed elements/components/etc. Furthermore, the terms "first" and "second" and the like in the claims and the description are used merely as labels, and are not numerical limitations of their objects.

While the invention has been described in terms of various specific embodiments, those skilled in the art will recognize that the invention can be practiced with modification within the spirit and scope of the claims.

Claims

1. An aviation food cart, said aviation food cart comprising:

a vehicle body;

the traveling mechanism is arranged at the bottom of the vehicle body and comprises a front axle and a rear axle;

the supporting leg oil cylinders are respectively arranged at the bottom of the vehicle body and are configured to lift the vehicle body;

the hydraulic control system is connected with the plurality of pairs of supporting leg oil cylinders so as to control the supporting leg oil cylinders and provide hydraulic power; and

the plurality of groups of telescopic in-place switches are respectively connected to the plurality of pairs of supporting leg oil cylinders, each group of telescopic in-place switches comprises a supporting leg extending in-place switch, when the supporting leg extending in-place switch is opened, the supporting leg extending in-place switch is configured to control the supporting leg oil cylinder to stop extending through the hydraulic control system when the supporting leg oil cylinder extends for a first stroke, and when the supporting leg extending in-place switch is closed, the supporting leg oil cylinder can continue extending to a second stroke after extending for the first stroke;

when the supporting leg oil cylinder extends to a first stroke, the vehicle body is jacked by the supporting leg oil cylinder to have a first ground clearance, and when the supporting leg oil cylinder extends to a second stroke, the vehicle body is jacked by the supporting leg oil cylinder to have a second ground clearance.

2. The aerial food cart of claim 1 comprising two pairs of said leg cylinders, one of said pairs of leg cylinders being located between said front axle and said rear axle, the other of said pairs of leg cylinders being located on a rear side of said rear axle; or the aviation food cart comprises two pairs of supporting leg oil cylinders and two groups of telescopic in-place switches, wherein one of the two pairs of supporting leg oil cylinders is positioned between the front axle and the rear axle, and the other supporting leg oil cylinder is positioned on the front side of the front axle.

3. The aero-food vehicle of claim 1 wherein the leg cylinder is a multi-stage cylinder, the multi-stage cylinder comprising at least two stages; when the first stage of the multi-stage oil cylinder extends out, the supporting leg oil cylinder extends out for a first stroke, and when the two stages of the multi-stage oil cylinder extend out, the supporting leg oil cylinder extends out for a second stroke.

4. The aerial food cart of claim 1, wherein the hydraulic control system comprises:

a hydraulic source module;

the control valves are respectively connected to the hydraulic source module through main oil supply pipelines, and are respectively connected to the pairs of supporting leg oil cylinders through sub oil supply pipelines; and

the control module is connected with the plurality of control valves and the plurality of groups of telescopic in-place switches;

the control module is configured to control the plurality of pairs of supporting leg oil cylinders through the plurality of control valves respectively, so that the plurality of pairs of supporting leg oil cylinders can lift independently and synchronously lift two supporting leg oil cylinders in the same pair.

5. The air food cart of claim 4 wherein each set of said telescoping position switches comprises one said leg reach position switch; and each support leg extending-to-position switch is respectively connected with one of the pair of support leg oil cylinders connected with the support leg extending-to-position switch.

6. The aerial food cart of claim 5, comprising two pairs of said leg cylinders and two sets of said reach switches, said two pairs of leg cylinders comprising a pair of front leg cylinders and a pair of rear leg cylinders arranged fore-aft in a length direction of said aerial food cart, said pair of front leg cylinders comprising a left front leg cylinder and a right front leg cylinder, said pair of rear leg cylinders comprising a left rear leg cylinder and a right rear leg cylinder; the two landing legs extend in-place switches to be connected to the left front landing leg oil cylinder and the right rear landing leg oil cylinder respectively, or the two landing legs extend in-place switches to be connected to the right front landing leg oil cylinder and the left rear landing leg oil cylinder respectively.

7. The aero-food vehicle of claim 4 wherein the hydraulic pressure source module comprises:

an oil tank connected to the plurality of control valves through the main oil supply line; and

and the oil pump is arranged on the main oil supply pipeline to provide oil supply power.

8. The aerial food cart of claim 1 wherein each set of said reach switches further comprises a leg retract reach switch, said leg retract reach switch connected to said leg cylinder; when the support leg retracting-to-position switch is turned on, the support leg retracting-to-position switch is configured to control the support leg oil cylinder to stop retracting through the hydraulic control system when the support leg oil cylinder retracts to the position.

9. The aerial food cart of claim 1, wherein said aerial food cart is carried by a floor of a flat bed transport cart; wherein the second ground clearance height is greater than or equal to the height of the platform floor of the flat transport vehicle.

10. The aircraft food cart of claim 9 wherein said second height above ground is between 0.9m and 1.5 m.