阅读说明：本技术 一种防滑托盘 (Anti-skid tray ) 是由 李晓林 赵立 汤新杰 于 2021-07-06 设计创作，主要内容包括：本发明属于托盘技术领域,具体涉及一种防滑托盘,包括托盘组件、第一吸盘组件以及抽吸泵,托盘组件包括托板,托板下端均匀设有三条并排设置的支撑脚,第一吸盘组件设置在托板上端,抽吸泵的数量为四个,四个抽吸泵两两为一组,两组抽吸泵分别设置在两侧的支撑脚上,四个抽吸泵均通过管道与第一吸盘组件连接,位于中间的支撑脚前后两端分别设有控制面板和蓄电池,蓄电池和四个抽吸泵均与控制面板电性连接,本发明结构新颖,设计巧妙,能够使货物与托盘固定在一起,避免货物从托盘上滑下,进而使托盘能够正常运输货物。(The invention belongs to the technical field of trays, and particularly relates to an anti-skidding tray which comprises a tray assembly, a first suction disc assembly and suction pumps, wherein the tray assembly comprises a tray, the lower end of the tray is uniformly provided with three support legs which are arranged side by side, the first suction disc assembly is arranged at the upper end of the tray, the number of the suction pumps is four, every two of the four suction pumps are in one group, the two groups of suction pumps are respectively arranged on the support legs at the two sides, the four suction pumps are respectively connected with the first suction disc assembly through pipelines, the front end and the rear end of the support leg positioned in the middle are respectively provided with a control panel and a storage battery, and the storage battery and the four suction pumps are electrically connected with the control panel.)

1. An antiskid tray which characterized in that: comprises a tray assembly, a first suction disc assembly and a suction pump;

the tray assembly comprises a supporting plate, and three supporting legs which are arranged side by side are uniformly arranged at the lower end of the supporting plate;

the first suction disc assembly is arranged at the upper end of the supporting plate, the number of the suction pumps is four, four the suction pumps are two-by-two in one group, two groups of the suction pumps are respectively arranged on the supporting legs at two sides, the four suction pumps are all connected with the first suction disc assembly through pipelines, the front end and the rear end of the supporting legs in the middle are respectively provided with a control panel and a storage battery, and the storage battery and the four suction pumps are electrically connected with the control panel.

2. The non-slip pallet according to claim 1, wherein: the first sucking disc component comprises a first connecting plate fixedly connected to the upper end of the supporting plate, the first connecting plate is uniformly provided with a plurality of first rectangular grooves, the upper end of the first connecting plate is provided with a first air guide plate, the first air guide plate is provided with a second rectangular groove corresponding to the first rectangular groove, the side length of the second rectangular groove is smaller than that of the first rectangular groove, the front wall and the rear wall of the second rectangular groove are respectively provided with a first air hole, the middle part of the first air guide plate is provided with a first cavity communicated with the first air holes, the first air guide plate is connected with a sucking pump through a pipeline, the upper end of the first air guide plate is provided with a first stabilizing plate, the first stabilizing plate is provided with a third rectangular groove corresponding to the second rectangular groove, the side length of the third rectangular groove is equal to that of the second rectangular groove, and the third rectangular groove and the second rectangular groove are jointly connected with a first rectangular cylinder in a sliding manner, the first rectangular cylinder lower extreme stretches into first rectangular channel and is equipped with the first limiting plate with second rectangular channel assorted, first rectangular cylinder upper end stretches out the third rectangular channel and is equipped with first sucking disc, first rectangular cylinder outside cover is equipped with first spring, first spring is located between first sucking disc and the first steadying plate, the second gas pocket has all been seted up to both sides around the first rectangular cylinder.

3. A non-slip pallet according to claim 2, wherein: the air suction end of the suction pump is connected with a first pipeline, the first pipeline penetrates through the supporting legs, the supporting plate and the first connecting plate and is finally fixedly connected to the lower end of the first air guide plate, and the first cavity is communicated with the air suction end of the suction pump through the first pipeline.

4. A non-slip pallet according to claim 2, wherein: a first rubber ring is arranged at the upper end of the first suction disc.

5. The non-slip pallet according to claim 1, wherein: the support plate is characterized by further comprising two second sucker components, wherein the two second sucker components are arranged at the lower end of the support plate and are respectively arranged in two intervals between the three support legs, each second sucker component comprises a second connecting plate fixedly connected to the lower end of the support plate, a plurality of fourth rectangular grooves are uniformly formed in the second connecting plate, a second air guide plate is arranged at the lower end of the second connecting plate and is provided with a fifth rectangular groove corresponding to the fourth rectangular groove, the side length of the fifth rectangular groove is smaller than that of the fourth rectangular groove, third air holes are formed in the front wall and the rear wall of each fifth rectangular groove, a second cavity communicated with the third air holes is formed in the middle of the second air guide plate, the second air guide plate is connected with the suction pump at the same side through a pipeline, a second stabilizing plate is arranged at the lower end of the second air guide plate, and is provided with a sixth rectangular groove corresponding to the fifth rectangular groove, the length of side of sixth rectangular channel equals with the length of side of fifth rectangular channel, the common sliding connection of sixth rectangular channel and fifth rectangular channel has a second rectangle section of thick bamboo, second rectangle section of thick bamboo upper end is stretched into the fourth rectangular channel and is equipped with the second limiting plate with fifth rectangular channel assorted, second rectangle section of thick bamboo lower extreme is stretched out the sixth rectangular channel and is equipped with the second sucking disc, second rectangle section of thick bamboo outside cover is equipped with the second spring, the second spring is located between second sucking disc and the second steadying plate, fourth gas pocket has all been seted up to both sides around the second rectangle section of thick bamboo.

6. An antiskid tray in accordance with claim 5, wherein: the air exhaust end of the suction pump is connected with a second pipeline, the second pipeline penetrates through the supporting leg and is finally fixedly connected to the side face of the second air guide plate on the same side, and the second cavity is communicated with the air exhaust end of the suction pump through the second pipeline.

7. An antiskid tray in accordance with claim 5, wherein: and a second rubber ring is arranged at the lower end of the second sucker.

8. An antiskid tray according to any one of claims 5 to 7, wherein: the top that is located the second limiting plate of foremost side central authorities and is located rearmost side central authorities in the second sucking disc subassembly all is equipped with the proximity switch of inlaying at the layer board lower extreme, is located the centre the supporting legs is equipped with bee calling organ, four proximity switch and bee calling organ all with control panel electric connection.

Technical Field

The invention belongs to the technical field of trays, and particularly relates to an anti-skidding tray.

Background

Pallets are media for converting static goods into dynamic goods, are cargo platforms, and are movable platforms, or movable floors. Even if the goods are put on the ground without flexibility, the mobility is immediately obtained after the pallets are loaded, and the goods become flexible mobile goods, because the goods loaded on the pallets are in a ready state for being transferred to the movement at any time.

The tray is usually made of hard plastics, the surface is smooth, and in the use process, the tray inclines, stops moving suddenly or starts moving suddenly and all causes goods to slide down from the tray easily, and this results in the tray can not normally transport the goods, to the above-mentioned problem, we have designed an antiskid tray.

Disclosure of Invention

The purpose of the invention is: aims to provide an anti-skid tray for solving the problems existing in the background technology.

In order to achieve the technical purpose, the technical scheme adopted by the invention is as follows:

an anti-slip tray comprising a tray assembly, a first suction cup assembly and a suction pump;

the tray assembly comprises a supporting plate, and three supporting legs which are arranged side by side are uniformly arranged at the lower end of the supporting plate;

the first suction disc assembly is arranged at the upper end of the supporting plate, the number of the suction pumps is four, four the suction pumps are two-by-two in one group, two groups of the suction pumps are respectively arranged on the supporting legs at two sides, the four suction pumps are all connected with the first suction disc assembly through pipelines, the front end and the rear end of the supporting legs in the middle are respectively provided with a control panel and a storage battery, and the storage battery and the four suction pumps are electrically connected with the control panel.

The storage battery is used for supplying power to the suction pump and the control panel, and the control panel is used for controlling the suction pump to be powered on and powered off;

during the use, place the goods on the first sucking disc subassembly of layer board upper end, then through control panel control suction pump circular telegram work, the suction pump during operation can cooperate the pipeline to make first sucking disc subassembly suction air, because the goods is placed on first sucking disc subassembly, so first sucking disc subassembly can directly suck the goods, the goods just can fix on first sucking disc subassembly under the negative pressure effect this moment, just so can prevent when the tray from taking place the slope or when stopping suddenly or starting to move, the goods slides down from the tray, and then makes the tray normally transport the goods.

The first sucking disc component comprises a first connecting plate fixedly connected to the upper end of the supporting plate, the first connecting plate is uniformly provided with a plurality of first rectangular grooves, the upper end of the first connecting plate is provided with a first air guide plate, the first air guide plate is provided with a second rectangular groove corresponding to the first rectangular groove, the side length of the second rectangular groove is smaller than that of the first rectangular groove, the front wall and the rear wall of the second rectangular groove are respectively provided with a first air hole, the middle part of the first air guide plate is provided with a first cavity communicated with the first air holes, the first air guide plate is connected with a sucking pump through a pipeline, the upper end of the first air guide plate is provided with a first stabilizing plate, the first stabilizing plate is provided with a third rectangular groove corresponding to the second rectangular groove, the side length of the third rectangular groove is equal to that of the second rectangular groove, and the third rectangular groove and the second rectangular groove are jointly connected with a first rectangular cylinder in a sliding manner, the first rectangular cylinder lower extreme stretches into first rectangular channel and is equipped with the first limiting plate with second rectangular channel assorted, first rectangular cylinder upper end stretches out the third rectangular channel and is equipped with first sucking disc, first rectangular cylinder outside cover is equipped with first spring, first spring is located between first sucking disc and the first steadying plate, the second gas pocket has all been seted up to both sides around the first rectangular cylinder.

The air suction end of the suction pump is connected with a first pipeline, the first pipeline penetrates through the supporting legs, the supporting plate and the first connecting plate and is finally fixedly connected to the lower end of the first air guide plate, and the first cavity is communicated with the air suction end of the suction pump through the first pipeline.

A first rubber ring is arranged at the upper end of the first suction disc.

The anti-skid tray also comprises two second sucker components which are arranged at the lower end of the supporting plate and are respectively arranged in two intervals between the three supporting legs, the second sucker components comprise second connecting plates fixedly connected at the lower end of the supporting plate, the second connecting plates are uniformly provided with a plurality of fourth rectangular grooves, the lower end of each second connecting plate is provided with a second air guide plate, the second air guide plate is provided with a fifth rectangular groove corresponding to the fourth rectangular groove, the side length of the fifth rectangular groove is smaller than that of the fourth rectangular groove, the front wall and the rear wall of each fifth rectangular groove are provided with third air holes, the middle part of the second air guide plate is provided with a second cavity communicated with the third air holes, the second air guide plate is connected with a suction pump at the same side through a pipeline, and the lower end of the second air guide plate is provided with a second stabilizing plate, the second stabilising plate is equipped with the sixth rectangular channel that corresponds with the fifth rectangular channel, the length of side of sixth rectangular channel equals with the length of side of fifth rectangular channel, the common sliding connection of sixth rectangular channel and fifth rectangular channel has a second rectangle section of thick bamboo, second rectangle section of thick bamboo upper end is stretched into and is equipped with the second limiting plate with fifth rectangular channel assorted in the fourth rectangular channel, second rectangle section of thick bamboo lower extreme is stretched out the sixth rectangular channel and is equipped with the second sucking disc, second rectangle section of thick bamboo outside cover is equipped with the second spring, the second spring is located between second sucking disc and the second stabilising plate, fourth gas pocket has all been seted up to both sides around the second rectangle section of thick bamboo.

The air exhaust end of the suction pump is connected with a second pipeline, the second pipeline penetrates through the supporting leg and is finally fixedly connected to the side face of the second air guide plate on the same side, and the second cavity is communicated with the air exhaust end of the suction pump through the second pipeline.

And a second rubber ring is arranged at the lower end of the second sucker.

The top that is located the second limiting plate of foremost side central authorities and is located rearmost side central authorities in the second sucking disc subassembly all is equipped with the proximity switch of inlaying at the layer board lower extreme, is located the centre the supporting legs is equipped with bee calling organ, four proximity switch and bee calling organ all with control panel electric connection.

The pallet is novel in structure and ingenious in design, goods can be fixed with the pallet, the goods are prevented from sliding down from the pallet, and the pallet can normally transport the goods.

Drawings

The invention is further illustrated by the non-limiting examples given in the accompanying drawings;

FIG. 1 is a schematic structural view of an embodiment of an anti-skid pallet of the present invention;

FIG. 2 is a schematic view of a scattering structure of an embodiment of the anti-skid pallet of the present invention;

FIG. 3 is an enlarged view of the structure at A in FIG. 2;

FIG. 4 is an enlarged view of the structure at B in FIG. 2;

FIG. 5 is a schematic longitudinal sectional view of the front and rear sides of FIG. 1;

FIG. 6 is an enlarged view of the structure at C in FIG. 5;

FIG. 7 is a schematic longitudinal sectional view of the left and right sides of FIG. 1;

FIG. 8 is an enlarged view of the structure at D in FIG. 7;

FIG. 9 is a schematic view of a partial cross-sectional structure of a first air guide plate according to the present invention;

FIG. 10 is a schematic view of a second air guide plate according to the present invention.

The air suction device comprises a supporting plate 1, supporting legs 11, a control panel 12, a first connecting plate 2, a first rectangular groove 21, a first air guide plate 22, a second rectangular groove 23, a first air hole 231, a first cavity 232, a first stabilizing plate 24, a third rectangular groove 25, a first rectangular cylinder 26, a first limiting plate 27, a first suction cup 28, a first spring 29, a second air hole 291, a first rubber ring 292, a suction pump 3, a first pipeline 31, a second connecting plate 4, a fourth rectangular groove 41, a second air guide plate 42, a fifth rectangular groove 43, a third air hole 431, a second cavity 432, a second stabilizing plate 44, a sixth rectangular groove 45, a second rectangular cylinder 46, a second limiting plate 47, a second suction cup 48, a second spring 49, a fourth air hole 491, a second rubber ring 492, a second pipeline 51 and a proximity switch 52.

Detailed Description

In order that those skilled in the art can better understand the present invention, the following technical solutions are further described with reference to the accompanying drawings and examples.

As shown in fig. 1 to 10, an anti-slip tray of the present invention comprises a tray assembly, a first suction cup assembly, and a suction pump 3;

the tray assembly comprises a supporting plate 1, and three supporting legs 11 which are arranged side by side are uniformly arranged at the lower end of the supporting plate 1;

first sucking disc subassembly sets up in layer board 1 upper end, and the quantity of suction pump 3 is four, and four suction pumps 3 are two liang for a set of, and two sets of suction pump 3 set up respectively on the supporting legs 11 of both sides, and four suction pumps 3 all are connected with first sucking disc subassembly through the pipeline, and both ends are equipped with control panel 12 and battery respectively around being located middle supporting legs 11, and battery and four suction pumps 3 all with control panel 12 electric connection.

The storage battery is used for supplying power to the suction pump 3 and the control panel 12, and the control panel 12 is used for controlling the suction pump 3 to be powered on and powered off;

during the use, place the goods on the first sucking disc subassembly of layer board 1 upper end, then control 3 circular telegrams of suction pump through control panel 12 and work, the suction pump 3 during operation can cooperate the pipeline to make first sucking disc subassembly suction air, because the goods is placed on first sucking disc subassembly, so first sucking disc subassembly can directly suck the goods, the goods just can fix on first sucking disc subassembly under the negative pressure effect this moment, just so can prevent when the tray from taking place the slope or when stopping suddenly or starting to move, the goods from the tray gliding down, and then make the tray can normally transport the goods.

The first sucking disc component comprises a first connecting plate 2 fixedly connected to the upper end of the supporting plate 1, the first connecting plate 2 is uniformly provided with a plurality of first rectangular grooves 21, the upper end of the first connecting plate 2 is provided with a first air guide plate 22, the first air guide plate 22 is provided with a second rectangular groove 23 corresponding to the first rectangular groove 21, the side length of the second rectangular groove 23 is smaller than that of the first rectangular groove 21, the front wall and the rear wall of the second rectangular grooves 23 are respectively provided with a first air hole 231, the middle part of the first air guide plate 22 is provided with a first cavity 232 communicated with the first air holes 231, the first air guide plate 22 is connected with the sucking pump 3 through a pipeline, the upper end of the first air guide plate 22 is provided with a first stabilizing plate 24, the first stabilizing plate 24 is provided with a third rectangular groove 25 corresponding to the second rectangular groove 23, the side length of the third rectangular groove 25 is equal to that of the second rectangular groove 23, the third rectangular groove 25 and the second rectangular groove 23 are jointly connected with a first cylinder 26 in a sliding manner, the lower end of the first rectangular cylinder 26 extends into the first rectangular groove 21 and is provided with a first limiting plate 27 matched with the second rectangular groove 23, the upper end of the first rectangular cylinder 26 extends out of the third rectangular groove 25 and is provided with a first suction disc 28, the outer side of the first rectangular cylinder 26 is sleeved with a first spring 29, the first spring 29 is located between the first suction disc 28 and the first stabilizing plate 24, and the front side and the rear side of the first rectangular cylinder 26 are provided with second air holes 291.

The end of bleeding of suction pump 3 is connected with first pipeline 31, and first pipeline 31 runs through supporting legs 11, layer board 1 and first connecting plate 2 and final fixed connection is at first air guide plate 22 lower extreme, and first cavity 232 communicates through the end of bleeding of first pipeline 31 with suction pump 3.

In the initial state, the first spring 29 cooperates with the first suction cup 28 and the first stabilizing plate 24 to lift the first rectangular tube 26 upward, so that the first limiting plate 27 abuts against the lower end of the first air guide plate 22, at this time, the second air holes 291 on the front side and the rear side of the first rectangular tube 26 are located in the third rectangular groove 25 of the first stabilizing plate 24, and at this time, the first rectangular tube 26 can seal the first air holes 231 on the front wall and the rear wall of the second rectangular groove 23.

When goods are placed on the first suction cup assembly, the goods are actually placed at the upper end of the first suction cup 28, the goods after placement press the first suction cup 28 under the action of their own gravity, the first suction cup 28 compresses the first spring 29 and pushes down the first rectangular cylinder 26 until the first limit plate 27 abuts against the pallet 1, at this time, the two second air holes 291 of the first rectangular cylinder 26 respectively align with the two first air holes 231 of the second rectangular groove 23, so that the first cavity 232 communicates with the inner space of the first rectangular cylinder 26, if the suction pump 3 is powered on, the suction pump 3 will suck air in the first cavity 232 through the first pipeline 31, and the first cavity 232 will suck air in the first rectangular cylinder 26 and the first suction cup 28 through the second air holes 291 and the first air holes 231, so that the lower end of the goods can be sucked, and the goods and the first suction cup 28 are fixed together, the goods are prevented from sliding down from the tray.

The goods is placed in first sucking disc 28 subassembly upper end middle part, if do not press first sucking disc 28 all around down, then the goods is to the first sucking disc 28 one side that is not pressed down when sliding, and the first sucking disc 28 that is not pressed down can block the goods, even if like this when suction pump 3 is out of work, also can be fine prevent that the goods from sliding down from the tray.

After the goods are taken away from the upper end of the first suction cup 28, the first spring 29 will rebound, and the first spring 29 rebounds to cooperate with the first suction cup 28 and the first stabilizing plate 24 to lift the first rectangular cylinder 26 upwards, so that the first rectangular cylinder 26 and the first suction cup 28 can return to the initial position.

First sucking disc 28 upper end is equipped with first rubber circle 292, and first rubber circle 292 can play the cushioning effect between first sucking disc 28 and goods, avoids the goods to be scraped the flower by first sucking disc 28, can also play the sealing action in addition, makes can be fixed inseparabler between goods and the first sucking disc 28.

The anti-skid tray also comprises two second sucker components which are arranged at the lower end of the supporting plate 1 and are respectively arranged in two intervals between the three supporting legs 11, each second sucker component comprises a second connecting plate 4 fixedly connected at the lower end of the supporting plate 1, the second connecting plates 4 are uniformly provided with a plurality of fourth rectangular grooves 41, the lower end of each second connecting plate 4 is provided with a second air guide plate 42, each second air guide plate 42 is provided with a fifth rectangular groove 43 corresponding to the corresponding fourth rectangular groove 41, the side length of each fifth rectangular groove 43 is smaller than that of each fourth rectangular groove 41, the front wall and the rear wall of each fifth rectangular groove 43 are respectively provided with a third air hole 431, the middle part of each second air guide plate 42 is provided with a second cavity 432 communicated with the plurality of third air holes 431, the second air guide plates 42 are connected with the suction pumps 3 at the same side through pipelines, the lower ends of the second air guide plates 42 are provided with second stabilizing plates 44, the second stabilizer plate 44 is provided with a sixth rectangular groove 45 corresponding to the fifth rectangular groove 43, the side length of the sixth rectangular groove 45 is equal to the side length of the fifth rectangular groove 43, the sixth rectangular groove 45 and the fifth rectangular groove 43 are connected with a second rectangular cylinder 46 in a sliding manner, the upper end of the second rectangular cylinder 46 extends into the fourth rectangular groove 41 and is provided with a second limiting plate 47 matched with the fifth rectangular groove 43, the lower end of the second rectangular cylinder 46 extends out of the sixth rectangular groove 45 and is provided with a second suction cup 48, the outer side of the second rectangular cylinder 46 is sleeved with a second spring 49, the second spring 49 is positioned between the second suction cup 48 and the second stabilizer plate 44, and the fourth air holes 491 are respectively arranged on the front side and the rear side of the second rectangular cylinder 46.

The air exhaust end of the suction pump 3 is connected with a second pipeline 51, the second pipeline 51 penetrates through the supporting foot 11 and is finally fixedly connected to the side surface of the second air guide plate 42 on the same side, and the second cavity 432 is communicated with the air exhaust end of the suction pump 3 through the second pipeline 51.

In the initial state, the second spring 49 cooperates with the second suction cup 48 and the second stabilizing plate 44 to push the second rectangular tube 46 downward, so that the second limit plate 47 abuts against the upper end of the second air guide plate 42, at this time, the fourth air holes 491 at the front and rear sides of the second rectangular tube 46 are all located in the sixth rectangular groove 45 of the second stabilizing plate 44, and at this time, the second rectangular tube 46 can close the third air holes 431 at the front and rear walls of the fifth rectangular groove 43.

When the anti-skid pallet is taken by the forklift using the fork, the two forks are respectively inserted into two spaces between the three supporting legs 11, the two forks start to be lifted upwards after being completely inserted, in the lifting process, the forks abut against the lower end of the second suction cup 48 and gradually drive the second suction cup 48 to move upwards, the second suction cup 48 compresses the second spring 49 and pushes the second rectangular tube 46 upwards in the upward movement process until the second limit plate 47 abuts against the supporting plate 1, at this time, the two fourth air holes 491 of the second rectangular tube 46 are respectively aligned with the two third air holes 431 of the fifth rectangular groove 43, so that the second cavity 432 is communicated with the inner space of the second rectangular tube 46, if the suction pump 3 is powered on to work, the suction pump 3 sucks the air in the second cavity 432 through the second pipeline 51, the second cavity 432 sucks the air in the second rectangular tube 46 and the second suction cup 48 through the fourth air holes 491 and the third air holes 431, just so can aspirate the upper end of fork, make the fork together fixed with second sucking disc 48, avoid the tray to slide down on the fork, when second limiting plate 47 and layer board 1 butt back, the fork continues to promote just can mention whole tray.

After the forks are removed from the underside of the pallet, the second spring 49 rebounds, and the second spring 49 rebounds to engage the second suction cup 48 and the second stabilizer plate 44 to push the second rectangular cylinder 46 downward, allowing the second rectangular cylinder 46 and the second suction cup 48 to return to the initial position.

The second rubber ring 492 is arranged at the lower end of the second sucker 48, the second rubber ring 492 can increase the friction coefficient between the second sucker 48 and the pallet fork, so that the pallet fork and the pallet are not easy to slide relatively, and in addition, the sealing effect can be achieved, so that the pallet fork and the pallet can be fixed more tightly.

The top of the second limiting plate 47 located at the center of the foremost side and the center of the rearmost side in the two groups of second sucker components is provided with a proximity switch 52 embedded at the lower end of the supporting plate 1, the supporting leg 11 located in the middle is provided with a buzzer, and the four proximity switches 52 and the buzzer are electrically connected with the control panel 12.

The proximity switch 52 is in an off state in an initial state, and when the second stopper plate 47 on the lower side of the proximity switch 52 abuts against the proximity switch 52, the proximity switch 52 is turned on;

the number of proximity switches 52 turned on is n, and since the number of proximity switches 52 is 4, the maximum value of n is 4;

when the tray is not forked, the second limit plates 47 below the four proximity switches 52 are not jacked up, the value of n is equal to 0, and the control panel 12 does not control the four suction pumps 3 to be electrified to work at the moment;

when the pallet is forked, 1 to 3 second limiting plates 47 below the four proximity switches 52 are not jacked, which indicates that two pallets are not completely forked at the moment, the value of n is more than or equal to 1 and less than 4 at the moment, the control panel 12 cannot control the four suction pumps 3 to be electrified and work at the same time can control the buzzer to give out buzzing alarm to remind a forklift driver that the pallet is not forked, and therefore the pallet can be prevented from slipping in the transportation process to a certain extent;

when the pallet is forked, the second limit plates 47 below the four proximity switches 52 are all jacked up, which indicates that the two forks are already in the fork-alignment position, and the value of n is equal to 4, the control panel 12 controls the four suction pumps 3 to be powered on to work, so that a user does not need to control the suction pumps 3 to work independently;

when the pallet fork is removed from the lower side of the pallet, the second limit plates 47 below the four proximity switches 52 are all far away from the proximity switches 52, at this time, the value of n is equal to 0, the control panel 12 controls the four suction pumps 3 to be powered off and stop working at this time, and therefore a user does not need to control the suction pumps 3 to stop working independently;

through such setting, the automation degree of the tray can be improved, so that the labor intensity of a user is reduced, and the slipping accident of the tray in the transportation process can be avoided to a certain extent.

The foregoing embodiments are merely illustrative of the principles of the present invention and its efficacy, and are not to be construed as limiting the invention. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.