A logistics storage center and intelligent transfer station thereof

Abstract

The present invention discloses a logistics storage center and an intelligent transfer station thereof, the logistics storage center includes a commodity storage area and a commodity transportation area, the commodity storage area is provided with multiple rows of shelves arranged at intervals, and the space between two adjacent rows of shelves is a walking path for pickers, the commodity transportation area is provided with multiple intelligent transfer stations arranged at intervals, the intelligent transfer stations are composed of a loading transfer station and a shipping transfer station, and turnover boxes are transported between each intelligent transfer station by a mobile robot, and the mobile robot travels along the landmarks set on the ground of the commodity transportation area. In the present invention, the picking trolley is provided with an upper bracket and a lower bracket, which can be inserted into the upper conveyor belt and the lower conveyor belt on the intelligent transfer station, and can be overlapped with the upper conveyor belt or the lower conveyor belt through a bridging device to realize the transmission of turnover boxes. It can be flexibly arranged according to orders, reducing investment costs.

Description

Technical Field

[0001] The present invention relates to the technical field of logistics management, and in particular to a logistics storage center and an intelligent transfer station thereof. Background Art

[0002] With the booming development of the Internet economy, advanced technologies such as automation and information are increasingly being used in smart logistics and warehousing centers. However, due to the limitation of investment costs, the current smart logistics and warehousing centers cannot be completely unmanned. Most of them still use manual picking of goods and use conveyor belts or mobile robots for automated transportation of goods.

[0003] Since the method of transporting goods by conveyor belts is rigid and cannot be flexibly changed, the solution of replacing conveyor belts with mobile robots can greatly improve the flexibility of the system. To this end, Chinese invention patent CN107628404A discloses a picking method based on order to person in a logistics warehousing center. The commodity storage area and commodity transportation area of ​​the logistics warehousing center are separated from each other independently, and the pickers and mobile handling robots work in different channels, which not only ensures safety but also ensures the high-speed movement of the mobile handling robots and improves efficiency; and the mobile handling robots do not enter the pickup channel, and the driving path is simple, which minimizes the transformation cost of the logistics warehousing center and reduces the complexity and maintenance cost of the hardware and software systems. However, the above solution requires the deployment of a large number of mobile robots to transport goods, and the investment cost is relatively high.

[0004] In view of this, it is necessary to improve the existing intelligent logistics warehousing centers to reduce investment costs and improve efficiency. Summary of the invention

[0005] The technical problem to be solved by the present invention is that the existing solutions that all utilize mobile robots to transport goods have a problem of too high investment cost.

[0006] In order to solve the above technical problems, the technical solution adopted by the present invention is to provide an intelligent transfer station, including:

[0007] The picking trolley docking device has a double-layer conveyor belt arranged up and down, which is used to transport the turnover boxes on the picking trolley to the intelligent transfer station, or transport the turnover boxes on the intelligent transfer station to the picking trolley;

[0008] Horizontal conveying device, used for conveying turnover boxes;

[0009] A bridging device, one end of which is hinged to the horizontal conveying device and the other end of which is overlapped with the picking trolley docking device, and the other end of which is overlapped with the upper conveyor belt or the lower conveyor belt in the picking trolley docking device by the turnover of the bridging device relative to the horizontal conveying device;

[0010] The robot docking device is used to transport the turnover boxes output from the horizontal conveying device to the mobile robot.

[0011] In the above-mentioned intelligent transfer station, the picking trolley docking device includes a first frame and an upper conveyor belt and a lower conveyor belt arranged up and down on the first frame. The upper conveyor belt and the lower conveyor belt are both composed of a first conveyor belt and a second conveyor belt connected together. The second conveyor belt is horizontally arranged and located behind the first conveyor belt.

[0012] In the above-mentioned intelligent transfer station, the front end of the first conveyor belt is inclined downward.

[0013] In the above-mentioned intelligent transfer station, the first conveyor belt and the second conveyor belt are driven separately.

[0014] In the above-mentioned intelligent transfer station, the bridging device includes a third frame and a fourth conveyor belt device arranged on the third frame. The rear end of the fourth conveyor belt device is rotatably arranged at the rear end of the third frame through a bridging shaft, and the front end of the fourth conveyor belt device is suspended. The bridging shaft is connected to a stepper motor, and the fourth conveyor belt device is driven by the stepper motor to rotate around the bridging shaft, so that the front end of the fourth conveyor belt device is connected to the upper conveyor belt of the picking trolley docking device or connected to the lower conveyor belt.

[0015] The present invention also provides a logistics warehousing center, including a commodity storage area and a commodity transportation area, the commodity storage area is provided with a plurality of rows of shelves arranged at intervals, and a walking passage for pickers and picking carts is provided between two adjacent rows of shelves, and the commodity transportation area is provided with a plurality of intelligent transfer stations arranged at intervals, and the intelligent transfer stations are composed of a loading transfer station and a shipping transfer station. Turnover boxes are transported between the intelligent transfer stations by mobile robots, and the mobile robots travel along the guidance of landmarks set on the ground in the commodity transportation area.

[0016] In the above-mentioned logistics warehousing center, the picking trolley includes a base frame and an upper support and a lower support arranged on the base frame. The upper support and the lower support are arranged at intervals on the upper and lower sides and are respectively used to carry turnover boxes. Two first columns are respectively provided on the left and right sides of the rear part of the base frame, and two second columns are respectively provided in front of the two first columns. The first column and the second column on each side are respectively provided with an upper cross beam and a lower cross beam. The upper cross beams arranged opposite to each other on the left and right constitute the upper support, and the lower cross beams arranged opposite to each other on the left and right constitute the lower support.

[0017] In the above-mentioned logistics storage center, after the turnover boxes are placed, there is a gap between the bottom surface of the turnover boxes on the upper bracket and the top surface of the turnover boxes on the lower bracket, which can accommodate the upper conveyor belt on the trolley docking device, and there is also a gap between the bottom surface of the turnover boxes on the lower bracket and the top surface of the base frame, which can accommodate the lower conveyor belt on the trolley docking device.

[0018] In the above-mentioned logistics storage center, multiple layers of staircase boards are arranged from bottom to top in the space enclosed by the first column and the second column, so as to form a ladder at the rear of the picking trolley.

[0019] In the above-mentioned logistics storage center, a temporary storage plate is provided above the first column, and the bottom surface of the temporary storage plate is fixed to the first column and the second column through a support rod, and the support rod is inclined forward from bottom to top.

[0020] Compared with the prior art, the logistics storage center and its intelligent transfer station provided by the present invention are provided with multiple intelligent transfer stations arranged at intervals in the commodity transportation area, and turnover boxes are transported between each intelligent transfer station by a mobile robot, and the mobile robot drives along the landmarks set on the ground of the commodity transportation area. Among them, the picking trolley is provided with an upper bracket and a lower bracket, which can be inserted into the upper conveyor belt and the lower conveyor belt on the intelligent transfer station, and can be overlapped with the upper conveyor belt or the lower conveyor belt through a bridging device to realize the transmission of turnover boxes. It can be flexibly arranged according to orders, reducing investment costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A schematic diagram of the logistics storage center provided by the present invention;

[0022] Figure 2 It is a structural schematic diagram of the intelligent transfer station in the present invention;

[0023] Figure 3 is a schematic diagram of a trolley docking device in the present invention;

[0024] Figure 4 is a schematic diagram of a bridging device in the present invention;

[0025] Figure 5 It is a schematic diagram of the feeding device of the transfer station in the present invention;

[0026] Figure 6 is a schematic diagram of a robot docking device in the present invention;

[0027] Figure 7 is a schematic diagram of the robot docking device of the present invention from another angle;

[0028] Figure 8 is a schematic diagram of a driving component in the present invention;

[0029] Fig. 9 is a schematic diagram of a picking trolley in the present invention;

[0030] Fig.10 This is a schematic diagram of the picking trolley of the present invention after unloading the turnover box;

[0031] Fig.11 It is a schematic diagram of the turnover box in the present invention;

[0032] Fig.12 is a schematic diagram of the rear wheel dual-wheel brake device of the present invention;

[0033] Fig.13 It is a schematic diagram of the exploded structure of the brake assembly in the present invention;

[0034] Fig.14 is a cross-sectional view of the brake assembly of the present invention;

[0035] Fig.15 It is a structural schematic diagram of the cam in the present invention. DETAILED DESCRIPTION

[0036] The present invention provides a logistics storage center and an intelligent transfer station thereof, which can reduce the deployment cost of the logistics storage center and improve efficiency.

[0037] In order to explain and illustrate the technical solution and implementation of the present invention more clearly, several preferred specific embodiments for implementing the technical solution of the present invention are introduced below. Obviously, the specific embodiments described below are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0038] Figure 1 A schematic diagram of the logistics storage center provided by the present invention, such as Figure 1 As shown, the logistics storage center provided by the present invention is arranged with a commodity storage area 100 and a commodity transportation area 200. The commodity storage area 100 is provided with multiple rows of shelves 300 arranged at intervals, and commodities are placed on the shelves 300. Between two adjacent rows of shelves 300 is a walking passage 400 for pickers. The pickers push the picking trolley 800 to move in the walking passage 400, and take the corresponding commodities from the corresponding shelves 300 according to the order, and place them in the turnover box 600 on the picking trolley 800.

[0039] The commodity transportation area 100 is adjacent to the commodity storage area 200. The walking passage 400 between the multiple rows of shelves 300 is perpendicular to the commodity transportation area 200. The commodity transportation area 200 is provided with a plurality of spaced-apart intelligent transfer stations 700. The intelligent transfer stations 700 are composed of loading transfer stations and unloading transfer stations. The turnover boxes 600 are transported between each intelligent transfer station 700 by a mobile robot 500. The mobile robot 500 travels along the landmarks set on the ground of the commodity transportation area 200.

[0040] The commodity sorting method of the logistics warehousing center is as follows:

[0041] The management system of the logistics warehouse center obtains an order from the order system, obtains the shelf numbers of all the goods in the order, and notifies the pickers responsible for picking goods on the corresponding shelves of the order, the goods to be picked, the shelves and the locations of the goods.

[0042] When any picker puts any item in the order into the turnover box on the picking trolley, the management system is notified of the start of picking for the order and the number of the turnover box is reported; at this time, the picker is called the first picker, the picking trolley is called the first picking trolley, and the first item put into the turnover box is called the first item;

[0043] The management system sends the turnover box number of the order to other pickers involved in the order.

[0044] After the first picker puts all the goods on the shelf in his / her charge into the turnover box according to the order, he / she pushes the first picking trolley to the first shipping transfer station, and the first shipping transfer station automatically takes the turnover box from the first picking trolley and delivers it to the first mobile robot. The first mobile robot will run to the first shipping transfer station in advance according to the notification of the management system to take over the turnover box.

[0045] The first mobile robot is not necessarily a designated mobile robot. The management system may notify an idle mobile robot closest to the first shipping transfer station as the first mobile robot based on the position of each mobile robot in the commodity transportation area and the cargo situation.

[0046] According to the order information, the first mobile robot transports the turnover box to the loading and unloading station next to the shelf corresponding to the next product. At this time, the loading and unloading station is called the first loading and unloading station. The first loading and unloading station automatically takes the turnover box from the first mobile robot and transfers the turnover box to the second picking trolley when the picker (second picker) of the next product connects the second picking trolley to the first loading and unloading station. If there is no second picking trolley connected to the first loading and unloading station, the turnover box will be parked on the first loading and unloading station waiting for the second picking trolley to connect.

[0047] According to the order information, the second picker pushes the second picking trolley to move in the corresponding walking channel, takes the corresponding goods from the corresponding shelves and puts them into the turnover boxes on the second picking trolley. After all the goods he is responsible for are put into the turnover boxes, he pushes the second picking trolley to the second shipping transfer station. The second shipping transfer station automatically takes the turnover boxes from the second picking trolley and transports them to the second mobile robot, which then transports them to the next loading transfer station.

[0048] This continues until the last picker puts all the remaining goods in the order into the turnover boxes on the final picking trolley, and then pushes the final picking trolley to the final shipping transfer station. The final shipping transfer station automatically takes the turnover boxes from the final picking trolley and transports them to the final mobile robot, which then transports the turnover boxes to the packing station for packaging and shipment, or the final mobile robot transports the turnover boxes to the shipping conveyor belt, which then transports the turnover boxes to the packing station for packaging and shipment.

[0049] The above-mentioned logistics storage center uses mobile robots to replace conveyor belts to transport turnover boxes between various intelligent transfer stations. The mobile robots can be flexibly directed to different intelligent transfer stations according to orders, and the transportation system has great flexibility. In addition, the intelligent transfer station serves as a temporary storage place for multiple turnover boxes, which maximizes the utilization rate of mobile robots, reduces the number of mobile robots, improves efficiency, and reduces investment costs.

[0050] In the above-mentioned logistics storage center, the structure of the loading carousel station and the shipping transfer station is basically the same, except that the conveying direction of the turnover box is different, that is, the running direction of the conveyor belt is different. For the loading carousel station, the turnover box is conveyed from the picking trolley to the loading carousel station, and for the shipping transfer station, the turnover box is conveyed from the shipping carousel station to the picking trolley. The specific structure of the intelligent transfer station is described below using the shipping carousel station as an example.

[0051] like Figure 2 As shown, the intelligent transfer station 700 includes a trolley docking device 710, a horizontal conveying device 720, a bridge device 730 and a robot docking device 740.

[0052] The trolley docking device 710 has an upper conveyor belt 711 and a lower conveyor belt 712 arranged up and down, which are used to transfer the turnover boxes on the upper support or the lower support of the picking trolley from the picking trolley to the trolley docking device.

[0053] The horizontal conveying device 720 is used to convey turnover boxes.

[0054] The bridging device 730 is arranged between the trolley docking device 710 and the horizontal conveying device 720. One end of the bridging device 730 is hinged to the horizontal conveying device 720, and the other end is overlapped with the picking trolley docking device 710. The bridging device 730 is rotated relative to the horizontal conveying device 720 to make the other end of the bridging device 730 overlap with the upper conveyor belt 711 or the lower conveyor belt 712 in the picking trolley docking device 710, so that the turnover boxes on the upper conveyor belt 711 or the lower conveyor belt 712 can be selectively transported to the horizontal conveying device 720.

[0055] The robot docking device 740 is used to transport the turnover boxes transported from the horizontal conveying device 720 to the mobile robot.

[0056] Specifically, Figure 3 As shown, the picking trolley docking device 710 includes a first frame 713 and an upper conveyor belt 711 and a lower conveyor belt 712 arranged on the first frame 713. A stopper 714 is provided on both sides of the upper conveyor belt 711 and the lower conveyor belt 712. The upper conveyor belt 711 and the lower conveyor belt 712 are both composed of a first conveyor belt and a second conveyor belt. The front end (entrance end) of the first conveyor belt is tilted downward, and the second conveyor belt is arranged horizontally and located behind the first conveyor belt. After the picking trolley is pushed into the robot docking device, the front end of the turnover box on the upper conveyor belt 711 and the lower conveyor belt 712 will slightly tilt upward, so that the entire bottom surface falls on the first conveyor belt, and the turnover box can be dragged and moved more smoothly. If the first conveyor belt is horizontal, the bottom surface of the turnover box may not be completely fitted with the first conveyor belt due to uneven ground, which reduces friction, causes slippage, and affects transmission.

[0057] The trolley docking device 710 is provided with a first photoelectric sensor and a second photoelectric sensor for detecting whether there is a turnover box on the first conveyor belt of the upper conveyor belt 711 and the lower conveyor belt 712. When a turnover box is detected, the first conveyor belt is started to transfer the turnover box to the second conveyor belt.

[0058] Preferably, the first conveyor belt and the second conveyor belt are driven separately, which can reduce energy consumption.

[0059] The horizontal conveying device 720 includes a second frame and a third conveyor belt device arranged on the second frame.

[0060] like Figure 4As shown, the bridging device 730 includes a third frame 731 and a fourth conveyor belt device 732 arranged on the third frame 731. The rear end of the fourth conveyor belt device 732 is rotatably arranged at the rear end of the third frame 731 through a bridging shaft 733. The front end of the fourth conveyor belt device 732 is suspended. The bridging shaft 733 is connected to a stepper motor, and the fourth conveyor belt device 732 is driven by the stepper motor to rotate around the bridging shaft 733, so that the front end of the fourth conveyor belt device 732 is connected to the upper conveyor belt 711 of the picking trolley docking device 710 or to the lower conveyor belt 712.

[0061] The trolley docking device 710 is also provided with a third photoelectric sensor for detecting whether there are turnover boxes on the second conveyor belts of the upper conveyor belt 711 and the lower conveyor belt 712. If it is detected that only the second conveyor belt of the upper conveyor belt 711 has turnover boxes, the stepper motor on the bridge device 730 is started to make the front end of the fourth conveyor belt device 732 overlap with the rear end of the second conveyor belt in the upper conveyor belt 711, so that the turnover boxes on the upper conveyor belt 711 are transferred to the horizontal conveying device 720; if it is detected that only the second conveyor belt of the lower conveyor belt 712 has turnover boxes, the stepper motor on the bridge device 730 is started to make the front end of the fourth conveyor belt device 732 overlap with the rear end of the second conveyor belt in the upper conveyor belt 711, so that the turnover boxes on the upper conveyor belt 711 are transferred to the horizontal conveying device 720; When there are turnover boxes on the conveyor belt, start the stepper motor on the bridge device so that the front end of the fourth conveyor belt device 732 overlaps with the rear end of the second conveyor belt in the lower conveyor belt 712, so that the turnover boxes on the lower conveyor belt 712 are transferred to the horizontal conveying device 720; if there are turnover boxes on both the upper conveyor belt 711 and the lower conveyor belt 712, the fourth conveyor belt device 732 overlaps with the upper conveyor belt 711 and the lower conveyor belt 712 in turn, and transfers the turnover boxes on the upper conveyor belt 711 and the lower conveyor belt 712 to the horizontal conveying device 720 in turn.

[0062] like Figure 5 As shown, the trolley docking device 710 and the bridge device 730 constitute a transfer station loading device.

[0063] like Figure 6 and Figure 7As shown, the robot docking device 740 includes a fourth frame 741 and a fifth conveying device arranged on the fourth frame 741. The rear end of the fifth conveying device is tilted downward, and the mobile robot is located below the exit end of the fifth conveying device. The turnover box is transferred to the mobile robot through the fifth conveying device. The fifth conveying device includes a fixed plate 742 and a synchronous belt 743, a synchronous transmission wheel and a driving assembly arranged on the fixed plate 742. The rear end of the fixed plate 742 is tilted downward, and a groove is arranged at the front end thereof. A square hole 7421 is arranged on the fixed plate 742, and a crossbeam is arranged on the left and right sides of the fourth frame 741. The first fixed rod 7422 fixes the fixed plate 742 to the fourth frame 741 through the square hole 7421. A second fixed rod 7423 arranged vertically to the fixed plate 742 is arranged at the front end of the fourth frame 741. The second fixed rod 7423 is inserted into the groove and fixed to the fixed plate 742 by a T-shaped right angle piece and a screw. Limiting plates 7411 are arranged on the top surfaces of the left and right sides of the fourth frame 741 , and the two ends of the limiting plates 7411 are opened outwards to limit the transmission of the turnover box on the transfer station robot docking device 740 .

[0064] The synchronous belt 743 is an annular conveyor belt, whose outer peripheral surface is provided with teeth with equal spacing, and whose inner peripheral surface is smooth; the synchronous transmission wheel is arranged on the same side of the fixed plate 742, including multiple first transmission wheels 744 and two second transmission wheels 745, the first transmission wheel 744 is transmission-connected with the outer peripheral surface of the synchronous belt 743, and its outer peripheral surface is provided with tooth grooves matching the teeth of the synchronous belt 743; the second transmission wheel 745 is transmission-connected with the inner peripheral surface of the synchronous belt 743, and its outer peripheral surface is smooth; the inner periphery of the synchronous transmission wheel is rotationally connected to the fixed plate 742 through bearings and bolts.

[0065] like Figure 8 As shown, the driving assembly includes a transmission shaft 746, a plurality of fixed sleeves 747 and a plurality of driving wheels 748 sleeved on the transmission shaft 746, the transmission shaft 746 is vertically arranged in a groove on the fixed plate 742, and a V-shaped long groove is arranged on the side of the transmission shaft. The fixed sleeve 747 is provided with a connecting ear protruding outward on the side, and the transmission assembly is fixed on the fixed plate 742 and the fourth frame 741 through the connecting ear. The number of driving wheels 748 is adapted to the fifth device, including a first transmission part 7481 and a second transmission part 7482, a tooth groove adapted to the tooth of the synchronous belt 743 is arranged on the outer circumference of the first transmission part 7481, the second transmission part 7482 is arranged on the top surface of the first transmission part 7481, and a fixing hole is arranged on the side of the second transmission part 7482 in the radial direction, and a screw is arranged in the fixing hole to mesh with the V-shaped long groove, and the driving shaft 746 is connected to a driving motor arranged on the side of the fourth frame 741, and the driving wheel 748 is driven to rotate synchronously through the driving motor and the driving shaft 746.

[0066] The fifth transmission device also includes a tightening device 749 disposed on the fixing plate, including:

[0067] The fixing part 7491 is fixed to the fixing plate 742 by screws, and a countersunk hole is provided on the top surface of the fixing part 7491;

[0068] The sliding part 7492 is provided with a slide groove on the fixed plate 742, and the fixed part 7491 is provided on both sides of the fixed plate 742 through bolts and the slide groove, and slides relative to the fixed part 7491 through screws;

[0069] The tightening part 7493 includes a fixed shaft arranged on the sliding part 7492, a bearing is sleeved on the fixed shaft, and the bearing is transmission-connected to the inner circumference of the synchronous belt 743.

[0070] The intelligent transfer station 700 is also provided with a weighing module, a cargo label scanning module and a cargo scanning module in a cargo box.

[0071] The weighing module is arranged on the horizontal conveying device 720, and can judge whether the goods in the turnover box are complete according to the weighing result.

[0072] The cargo scanning module in the cargo box is a camera arranged above the horizontal conveying device 720. The total volume of the goods can be obtained by scanning the goods in the cargo box, so as to allocate packaging boxes of corresponding specifications.

[0073] In the above-mentioned logistics storage center, the structure of the picking trolley 800 is as follows: Fig. 9 , Fig.10 As shown, the picking trolley 800 includes a base frame 810 and an upper support 820 and a lower support 830 arranged on the base frame 810. The upper support 820 and the lower support 830 are arranged at intervals above and below and are respectively used to carry turnover boxes 600. Each layer of the support can carry multiple turnover boxes 600.

[0074] Four universal wheels 811 are respectively provided at the four corners of the bottom surface of the base frame 810, so that the travel direction can be changed arbitrarily.

[0075] Two first columns 812 are respectively provided on the left and right sides of the rear part of the base frame 810, and two second columns 813 are respectively provided in front of the two first columns 812. The lower ends of the first columns 812 and the second columns 813 are respectively fixed to the base frame 810. An upper crossbeam 814 and a lower crossbeam 815 are respectively provided on the first columns 812 and the second columns 813 on each side. The upper crossbeams 814 on the left and right sides constitute an upper bracket 820, and the lower crossbeams 815 on the left and right sides constitute a lower bracket 830.

[0076] like Fig.11As shown, the turnover box 600 has a box body 611 with an open upper end, and the left and right side walls of the box body 611 are respectively provided with wing plates 612 arranged along the length direction thereof. The spacing between the two upper cross beams 814 in the upper bracket 820 and the spacing between the two lower cross beams 815 in the lower bracket 830 are adapted to the width of the box body 611, and the wing plates 612 are supported on the upper cross beams 814 or the lower cross beams 815, and the wing plates 612 can slide along the upper cross beams 814 or the lower cross beams 815.

[0077] After the turnover box 600 is placed, there is a gap between the bottom surface of the turnover box on the upper bracket 820 and the top surface of the turnover box 600 on the lower bracket 830, and the gap can accommodate the upper conveyor belt 711 on the trolley docking device 710. There is also a gap between the bottom surface of the turnover box 600 on the lower bracket 830 and the top surface of the base frame 810, and the gap is used to accommodate the lower conveyor belt 712 on the trolley docking device 710.

[0078] When in use, first push the picking trolley 800 to one end of the trolley docking device 710, and continue to push the picking trolley 800 so that the bottom surface of the turnover box 600 on the upper bracket 820 falls on the upper conveyor belt 711, and at the same time, the bottom surface of the turnover box 600 on the lower bracket 830 falls on the lower conveyor belt 712. When the upper conveyor belt 711 is started, the turnover box 600 on the upper bracket 820 can be dragged away from the picking trolley 800. When the lower conveyor belt 712 is started, the turnover box 600 on the lower bracket 830 can be dragged away from the picking trolley.

[0079] A sealing plate 816 is provided on the rear side of the upper crossbeam 814 and the lower crossbeam 815. In the space enclosed by the first column 812 and the second column 813, multiple layers of stair plates 817 are provided from bottom to top, thereby forming a ladder at the rear of the picking trolley 800. The picker can climb the ladder to place the goods on the upper layer of the shelf.

[0080] The length of the stair tread of the upper layer is shorter than that of the stair tread of the lower layer, so that an area for placing a tool box is formed on the stair tread of the lower layer below the stair tread of the upper layer.

[0081] A trolley handrail 818 is provided on the rear side surface of the two first columns 812 respectively. The trolley handrail 818 is U-shaped, and the open end is fixed to the first column 812. The first column 812 is inclined from bottom to top toward the front, so that the picker can save more effort when pushing the picking trolley 800.

[0082] A temporary storage plate 821 is provided above the first column 812, and the bottom surface of the temporary storage plate 818 is fixed to the first column 812 and the second column 813 via a support rod 822. The support rod 822 is inclined forward from bottom to top, so that the temporary storage plate 821 is basically located directly above the picking trolley 800. After placing the goods, its center of gravity is basically located at the center of the picking trolley 800, which increases stability.

[0083] Obstacle avoidance wheels 819 are provided on the left and right sides of the front end of the base frame 810. The axles of the obstacle avoidance wheels 819 are vertically fixed on the bottom surface of the base frame 810. The wheel bodies of the obstacle avoidance wheels 819 are made of rubber material and can rotate around the axles. The outer circumference of the obstacle avoidance wheels 819 protrudes from the front end surface and side surfaces of the base frame 810. In this way, when encountering an obstacle, the obstacle avoidance wheels 819 will be hit first. The elasticity of the obstacle avoidance wheels 819 will cause the picking trolley 800 to change direction, thereby preventing the base frame 810 from directly colliding with the obstacle and generating strong vibrations, thereby damaging the goods in the turnover box.

[0084] The picking trolley of the present invention has a double-wheel brake device on the rear wheels, and the two rear wheels can be braked synchronously at the same time. The double-wheel brake device includes a pedal assembly and a brake assembly.

[0085] like Fig.12 As shown, the pedal assembly includes a pedal 841, and a connecting rod 842 is provided at both ends thereof, and a first rotating shaft 843 is fixed to the other end of the connecting rod 842. The first rotating shaft 843 is in the shape of a prism, and is used to drive the brake assembly to lock the wheel body of the rear wheel. In this embodiment, the first rotating shaft 843 is a hexagonal prism. The pedal 841 is composed of a pedal shaft and a shaft sleeve sleeved on the pedal shaft, and the shaft sleeve is made of rubber and can rotate on the pedal shaft.

[0086] like Fig.13 , Fig.14 As shown, the brake assembly includes a cam 851 and a cam seat 852. Second rotating shafts 853 are respectively protruded on both side surfaces of the cam 851. The second rotating shaft 853 is axially provided with an axial hole 854. The axial hole 854 is adapted to the first rotating shaft 843. The cam 851 can rotate with the rotation of the first rotating shaft 843.

[0087] The cam seat 852 is composed of two halves which are relatively assembled, and the upper end is fixed by a retaining ring 855. The second rotating shaft 853 is rotatably arranged in the cam seat 852. Two pins 856 are arranged at the upper end of the cam seat 852, and the pins 856 are perpendicular to the axis of the cam seat 852.

[0088] like Fig.15 As shown, the outer circumferential surface profile of the cam 851 is composed of a protrusion 8511 and a recessed portion 8512 , a pit 8513 is provided in the middle of the protrusion 8511 , and two spaced grooves 8514 are provided at one end of the protrusion 8511 , and the grooves 8514 are adapted to the pin shaft 856 .

[0089] See also Fig.12 , Fig.13 , Fig.14 As shown, a connecting tube 861 is provided at the upper end of the universal angle wheel 811, and a cam seat 852 is inserted into the upper end of the connecting tube 861 from top to bottom. An extension shaft is provided at the lower end of the connecting tube 861, and a locking shaft 862 is provided in the shaft hole of the extension shaft. A flange is provided at the upper end of the locking shaft 862, and a spring 863 is sleeved under the flange. The upper end of the locking shaft 862 is against the cam 851, and the lower end is opposite to the wheel body 864 of the wheel.

[0090] When the user steps on the pedal 841, the first rotating shaft 843 rotates accordingly, and the first rotating shaft 843 drives the cam 851 to rotate, and the protrusion 8511 pushes the locking shaft 862 downward. When the pin 856 enters the groove 8514, the lower end of the locking shaft 862 abuts against the outer circumference of the wheel body 864, thereby locking the wheel body 864. After releasing the pedal 841, the locking shaft 862 bounces upward under the action of the spring 863, and its lower end leaves the wheel body 864, so that the wheel body 864 can rotate arbitrarily.

[0091] The present invention has the following advantages:

[0092] (1) It can be flexibly configured according to orders to meet various requirements such as order reception and processing, assembly of goods, customization of special packaging, and subsequent domestic and international shipments.

[0093] (2) Save a lot of manual walking mileage, shorten the working walking distance, and be able to respond to orders quickly and save valuable time.

[0094] The present invention is not limited to the above-mentioned optimal implementation mode. Anyone should be aware that any structural changes made under the inspiration of the present invention, and any technical solutions that are the same or similar to the present invention, fall within the protection scope of the present invention.

Claims

1. A logistics storage center, characterized in that: include: Commodity storage area and commodity transportation area, the commodity storage area is provided with multiple rows of shelves arranged at intervals, and there is a walking passage for pickers and picking carts between two adjacent rows of shelves, and the walking passage between the multiple rows of shelves is perpendicular to the commodity transportation area, characterized in that the commodity transportation area is provided with multiple intelligent transfer stations arranged at intervals, and the intelligent transfer stations are composed of loading transfer stations and shipping transfer stations. Turnover boxes are transported between the intelligent transfer stations by mobile robots, and the mobile robots travel along the landmarks set on the ground of the commodity transportation area; The intelligent transfer station comprises: The picking trolley docking device has a double-layer conveyor belt arranged up and down, which is used to transport the turnover boxes on the picking trolley to the intelligent transfer station, or transport the turnover boxes on the intelligent transfer station to the picking trolley; Horizontal conveying device, used for conveying turnover boxes; A bridging device, one end of which is hinged to the horizontal conveying device and the other end of which is overlapped with the picking trolley docking device, and the other end of which is overlapped with the upper conveyor belt or the lower conveyor belt in the picking trolley docking device by the bridging device rotating relative to the horizontal conveying device; A robot docking device, used for delivering the turnover box output from the horizontal conveying device to the mobile robot; The picking trolley comprises a base frame and an upper support and a lower support arranged on the base frame, the upper support and the lower support are arranged at intervals in the upper and lower parts and are respectively used to carry turnover boxes, two first upright posts are respectively arranged on the left and right sides of the rear part of the base frame, two second upright posts are respectively arranged in front of the two first upright posts, an upper crossbeam and a lower crossbeam are respectively arranged on the first upright post and the second upright post on each side, the upper crossbeams arranged opposite to each other on the left and right constitute the upper support, and the lower crossbeams arranged opposite to each other on the left and right constitute the lower support; After the turnover box is placed, there is a gap between the bottom surface of the turnover box on the upper bracket and the top surface of the turnover box on the lower bracket, which can accommodate the upper conveyor belt on the trolley docking device. There is also a gap between the bottom surface of the turnover box on the lower bracket and the top surface of the base frame, which can accommodate the lower conveyor belt on the trolley docking device.

2. The logistics storage center according to claim 1, characterized in that: The picking trolley docking device includes a first frame and an upper conveyor belt and a lower conveyor belt arranged up and down on the first frame. The upper conveyor belt and the lower conveyor belt are both composed of a first conveyor belt and a second conveyor belt connected together. The second conveyor belt is horizontally arranged and located behind the first conveyor belt.

3. The logistics storage center according to claim 2, characterized in that: The front end of the first conveyor belt is inclined downward.

4. The logistics storage center according to claim 2, characterized in that: The first conveyor belt and the second conveyor belt are driven independently.

5. The logistics storage center according to claim 1, characterized in that: The bridging device includes a third frame and a fourth conveyor belt device arranged on the third frame. The rear end of the fourth conveyor belt device is rotatably arranged at the rear end of the third frame through a bridging shaft, and the front end of the fourth conveyor belt device is suspended. The bridging shaft is connected to a stepper motor, and the fourth conveyor belt device is driven to rotate around the bridging shaft by the stepper motor, so that the front end of the fourth conveyor belt device is connected to the upper conveyor belt of the picking trolley docking device or connected to the lower conveyor belt.

6. The logistics storage center according to claim 1, characterized in that: In the space enclosed by the first column and the second column, multiple layers of staircase plates are arranged from bottom to top, so as to form a ladder at the rear of the picking trolley.

7. The logistics storage center according to claim 1, characterized in that: A temporary storage plate is provided above the first column, and the bottom surface of the temporary storage plate is fixed to the first column and the second column via a support rod, and the support rod is inclined forward from bottom to top.

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