Middle bag supply sorting system and method

Abstract

The invention provides a centrally-mounted bag supplying and sorting system and method.The centrally-mounted bag supplying and sorting system comprises a fixed frame, a feeding and bag supplying mechanism, at least one sorting trolley movably installed on the fixed frame, a plurality of discharging sliding grooves installed on the fixed frame and a material receiving mechanism arranged on the outer side of the fixed frame, and the fixed frame and the feeding and bag supplying mechanism are fixedly installed; the sorting trolley can do reciprocating motion between the feeding and bag supplying mechanism and the discharging sliding grooves, the material receiving mechanism is provided with a plurality of material receiving frames corresponding to the discharging sliding grooves in a one-to-one mode, a feeding and bag supplying station is arranged in the fixing frame, and the feeding and bag supplying mechanism is arranged at the feeding and bag supplying station of the fixing frame. And the fixing frame is provided with blanking chutes and receiving mechanisms on different sides of the loading and bag supplying mechanism. After the middle bag supply structure is adopted, the moving distance of the sorting trolley in the extending direction of the fixed frame during single-time sorting can be shortened, then the time needed by single-time sorting is shortened, the number of the discharging sliding grooves and the number of the material receiving mechanisms can be relatively increased, and therefore the sorting efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of sorting of commodities, express parcels and the like, and in particular to a central package supply and sorting system, and a central package supply and sorting method using the central package supply and sorting system. Background Art

[0002] The automatic express sorting system can automatically transport each express package among multiple express packages to the corresponding grid, and automatically sort large quantities of express packages continuously. It has the advantages of high sorting efficiency and low sorting error rate, and is widely used in logistics distribution centers.

[0003] Usually, the express automatic sorting system includes a fixed frame and a feeding and packaging mechanism that are all fixedly installed, a mobile frame that is movably installed on the fixed frame along the length direction of the fixed frame, a sorting trolley that is movably installed on the mobile frame along the height direction of the fixed frame, and a receiving mechanism arranged on the outer side of the fixed frame along the width direction of the fixed frame. The fixed frame is provided with multiple grid openings (i.e., material drop chutes), and the receiving mechanism is provided with multiple receiving frames, and the multiple receiving frames correspond to the multiple grid openings one by one. When the express automatic sorting system is in operation, the sorting personnel only need to place multiple express parcels on the feeding and packaging mechanism, and the sorting trolley moves to the feeding and packaging mechanism to receive the express parcels. The sorting trolley then moves to the corresponding grid opening according to the information on the express parcels, and the sorting trolley moves the express parcels out, and the express parcels slide into the corresponding receiving frame through the grid opening. The automatic sorting of multiple express parcels is achieved by the reciprocating movement of the sorting trolley between the feeding and packaging mechanism and the grid opening.

[0004] Existing express automatic sorting systems all adopt a terminal package supply structure, that is, the feeding and supplying mechanism is set at the end of the length direction of the fixed frame, such as a multi-axis double-cart automatic sorting device disclosed in the Chinese invention patent application with application number 202211171868.9, and an XYZ three-axis stereo automatic sorting device disclosed in the Chinese utility model patent with application number 202221541022.5, and an efficient double-cart automatic sorting device disclosed in the Chinese utility model patent with application number 202320994516.7. Based on the existing terminal package supply structure, after the sorting trolley transfers the express to the grid, the mobile frame needs to drive the sorting trolley to move along the length direction of the fixed frame to the end of the fixed frame, resulting in a long moving distance of the mobile frame and the sorting trolley in the length direction of the fixed frame, which is not conducive to further improving the sorting efficiency. Summary of the invention

[0005] In view of the above-mentioned shortcomings of the prior art, an object of the present invention is to provide a central package supply and sorting system with higher sorting efficiency.

[0006] To achieve the above-mentioned purpose, the present invention provides a central package supply and sorting system, including a fixed frame and a loading and supplying mechanism, both of which are fixedly installed, at least one sorting trolley movably installed on the fixed frame, a plurality of blanking chutes, both of which are installed on the fixed frame, and a material receiving mechanism arranged on the outer side of the fixed frame, the sorting trolley can reciprocate between the loading and supplying mechanism and the blanking chute, the material receiving mechanism has a plurality of material receiving frames corresponding to the blanking chutes one by one, a loading and supplying station is provided in the fixed frame, the loading and supplying mechanism is arranged at the loading and supplying station of the fixed frame, and the fixed frame is provided with the blanking chute and the material receiving mechanism on different sides of the loading and supplying mechanism.

[0007] Furthermore, the fixed frame is in a straight line shape, and the feeding direction of the feeding and packaging mechanism is perpendicular to the extension direction of the fixed frame; along the extension direction of the fixed frame, the feeding and packaging station and the feeding and packaging mechanism are both arranged at the middle position of the fixed frame;

[0008] The central package supply and sorting system is provided with sorting subsystems at both sides of the package supply station and the package supply mechanism in a direction perpendicular to the loading direction of the package supply mechanism, and each sorting subsystem includes a partial fixed frame, a material dropping chute and a material receiving mechanism.

[0009] Furthermore, the central package supply and sorting system is a single-vehicle structure, and one sorting trolley is configured. The one sorting trolley can move in the area on both sides of the loading and supply station along the extension direction of the fixed frame.

[0010] Furthermore, the central package supply and sorting system is a double-cart structure, and two sorting carts are configured. The two sorting carts can move in the area on both sides of the loading and supply station along the extension direction of the fixed frame.

[0011] Furthermore, the central package supply and sorting system is a four-car structure, and there are 4 sorting carts, two of which are arranged in an area on one side of the loading and supply station along the extension direction of the fixed frame and can move within the area, and the other two sorting carts are arranged in an area on the other side of the loading and supply station along the extension direction of the fixed frame and can move within the area.

[0012] Furthermore, each of the sorting carts is movably mounted on a fixed frame via a set of sorting transmission mechanisms;

[0013] Each set of sorting transmission mechanism comprises an X-direction guide rail fixed to a fixed frame, an X-direction moving driving source, an X-direction moving frame slidably matched with the X-direction guide rail, a Y-direction moving driving source, and a Y-direction guide rail fixed to the X-direction moving frame, wherein the X-direction guide rail extends straightly along the extension direction of the fixed frame, and both ends extend to both ends of the fixed frame respectively, and the Y-direction guide rail extends straightly up and down along the height direction of the fixed frame, the X-direction moving driving source is drivingly connected to the X-direction moving frame, the sorting trolley is slidingly matched with the Y-direction guide rail, and the Y-direction moving driving source is drivingly connected to the sorting trolley;

[0014] The material feeding and packaging stations are distributed on a moving path where the X-direction moving frame slides along the X-direction guide rail.

[0015] Further, the X-direction moving driving source is an X-direction driving motor fixed to a fixed frame, and the Y-direction moving driving source is a Y-direction driving motor fixed to an X-direction moving frame;

[0016] The X-direction driving motor is connected to the X-direction moving frame through a first synchronous belt transmission assembly, the first synchronous belt transmission assembly includes a first driving pulley and a first driven pulley both rotatably supported in a fixed frame, and a first synchronous belt connected to the outer periphery of the first driving pulley and the first driven pulley, the X-direction driving motor is connected to the first driving pulley, and the first synchronous belt is fixedly connected to the X-direction moving frame;

[0017] The Y-direction driving motor is connected to the sorting trolley through a second synchronous belt transmission assembly, the second synchronous belt transmission assembly includes a second driving pulley and a second driven pulley rotatably supported in the X-direction moving frame, and a second synchronous belt connected to the outer periphery of the second driving pulley and the second driven pulley, the Y-direction driving motor is connected to the second driving pulley, and the second synchronous belt is fixedly connected to the sorting trolley;

[0018] The extension path of the first synchronous belt and the extension path of the second synchronous belt both cover the material loading and packaging station.

[0019] Furthermore, when the central package supply and sorting system is a four-car structure, two X-axis mobile racks are distributed on both sides of the loading and packaging station along the extension direction of the fixed frame and on one side of the fixed frame along the width direction of the fixed frame, and share the same X-guide rail; the remaining two X-axis mobile racks are distributed on both sides of the loading and packaging station along the extension direction of the fixed frame and on the other side of the fixed frame along the width direction of the fixed frame, and share the same X-guide rail; the two sets of first synchronous belt drive assemblies connected to the two X-axis mobile racks sharing the same X-guide rail are staggered in the width direction of the fixed frame.

[0020] Furthermore, the fixed frame is provided with a corner on its extension path, and the material loading and packaging supply station and the material loading and packaging supply mechanism are both arranged at the corner of the fixed frame along the extension direction of the fixed frame.

[0021] Furthermore, the fixed frame is L-shaped; along the feeding direction of the feeding and packaging mechanism, the fixed frame is provided with a sorting subsystem on the opposite side of the feeding and packaging mechanism; along the direction perpendicular to the feeding direction of the feeding and packaging mechanism, the fixed frame is provided with a sorting subsystem on one side of the feeding and packaging mechanism; each sorting subsystem includes a part of the fixed frame, a material dropping chute and a material receiving mechanism.

[0022] Furthermore, the fixed frame is T-shaped; along the feeding direction of the feeding and packaging mechanism, the fixed frame is provided with a sorting subsystem on the opposite side of the feeding and packaging mechanism; along the direction perpendicular to the feeding direction of the feeding and packaging mechanism, the fixed frame is provided with sorting subsystems on both sides of the feeding and packaging mechanism; each sorting subsystem includes a part of the fixed frame, a material dropping chute and a material receiving mechanism.

[0023] Furthermore, in each of the sorting subsystems, the fixed frame is provided with a material-dropping mechanism on both sides perpendicular to its extension direction, and a trolley movement space allowing the sorting trolley to move is formed between the two sets of material-dropping mechanisms;

[0024] Each set of blanking mechanisms includes a plurality of chute bottom plates arranged side by side up and down and fixed to a fixed frame, and a plurality of chute baffles arranged side by side along the extension direction of the fixed frame are fixed to each chute bottom plate, and the blanking chute is formed between two adjacent chute baffles and the chute bottom plate;

[0025] A soft pad extending toward the empty area for movement of the trolley is fixed at the inner edge of each slide groove bottom plate close to the empty area for movement of the trolley.

[0026] Furthermore, the soft cushion includes a plurality of silicone strips arranged side by side along the extension direction of the fixed frame.

[0027] Furthermore, the feeding and packaging mechanism includes a fixed feeding and packaging frame, and multiple groups of feeding belt conveyor mechanisms installed on the feeding and packaging frame. The multiple groups of feeding belt conveyor mechanisms are connected in sequence along their conveying direction, and the driving sources of the multiple groups of feeding belt conveyor mechanisms are independent of each other.

[0028] Furthermore, along the conveying direction of the feeding belt conveyor mechanism, multiple groups of feeding belt conveyor mechanisms are distributed in a stepped manner from high to low.

[0029] Furthermore, the feeding and packaging mechanism also includes a grating sensor arranged on the outer side of each group of feeding belt conveyor mechanisms and fixed to the feeding and packaging frame, and the feeding and packaging frame is provided with a detection opening allowing the grating sensor to be exposed.

[0030] Further, the sorting trolley comprises a trolley frame movably mounted on a fixed frame, and a material transfer belt conveyor mechanism mounted on the trolley frame;

[0031] The material transfer belt conveying mechanism comprises a material transfer conveying belt, and a plurality of stop bars arranged side by side along the length direction of the material transfer conveying belt are fixed on the outer surface of the material transfer conveying belt.

[0032] Furthermore, the sorting trolley also includes a metal sheet fixed to the side of one of the gear bars, and a proximity switch fixed to the trolley frame, and the proximity switch can sense the metal sheet.

[0033] Furthermore, the sorting trolley also includes a photoelectric sensor and a reflective plate fixed to the trolley frame, the photoelectric sensor and the reflective plate are distributed opposite each other in the up and down directions, the material transfer conveyor belt passes between the photoelectric sensor and the reflective plate and is provided with a light-transmitting hole, and the light-transmitting hole can be moved to a position opposite to the reflective plate.

[0034] The present invention also provides a central package sorting method, using the central package sorting system as described above, the central package sorting method comprises the following steps:

[0035] S1. placing a plurality of sorted objects in order on the feeding and packaging mechanism, and the feeding and packaging mechanism transports the sorted objects toward a fixed frame;

[0036] S2, the sorting trolley moves to the feeding and packaging mechanism to receive the sorted objects output by the feeding and packaging mechanism;

[0037] S3, the sorting trolley receives the sorted objects output by the feeding and packaging mechanism;

[0038] S4, the sorting trolley moves to the drop chute corresponding to the sorted object on the sorting trolley;

[0039] S5, the sorting trolley unloads the sorted objects thereon, and the sorted objects fall into the receiving frame corresponding to the material dropping chute through the material dropping chute;

[0040] S6, the sorting trolley moves back to the feeding and packaging mechanism;

[0041] S7, repeat steps S3 to S6;

[0042] In the step S4 that is performed multiple times, the sorting trolley can move toward the blanking chutes distributed on different sides of the loading and packaging mechanism.

[0043] As described above, the central package supply and sorting system and method according to the present invention have the following beneficial effects:

[0044] The present application arranges the loading and packaging station and the loading and packaging mechanism at a non-terminal position in the extension direction of the fixed frame, so that the fixed frame is provided with a blanking chute and a material receiving mechanism on different sides of the loading and packaging station and the loading and packaging mechanism, which is a central packaging supply structure, or a non-terminal packaging supply structure. Compared with the terminal packaging supply structure in the prior art in which the loading and packaging station and the loading and packaging mechanism are arranged at one end in the extension direction of the fixed frame, the present application can shorten the moving distance of the sorting trolley in the extension direction of the fixed frame during a single sorting, thereby shortening the time required for a single sorting, and can relatively increase the number of blanking chutes and material receiving mechanisms, thereby improving the sorting efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] Figure 1 This is a schematic diagram of the structure of the first embodiment of the package supply and sorting system in this application.

[0046] Figure 2 for Figure 1 Top view of the .

[0047] Figure 3 for Figure 1 Schematic diagram of the assembly of the sorting trolley in a fixed frame when a single-trolley structure is adopted.

[0048] Figure 4 for Figure 3 Schematic diagram from another perspective.

[0049] Figure 5 for Figure 1 Schematic diagram of the assembly of the sorting trolley in the fixed frame when a double-trolley structure is adopted.

[0050] Figure 6 for Figure 5 Enlarged view of circle A.

[0051] Figure 7 for Figure 5 Schematic diagram of the connection between the sorting trolley and the X-axis mobile rack.

[0052] Figure 8 for Figure 1 Schematic diagram of the assembly of the sorting trolley in the fixed frame when a four-car structure is adopted.

[0053] Fig. 9 for Figure 8 Assembly diagram of four sorting trolleys and four sets of sorting transmission mechanisms.

[0054] Fig.10 for Figure 8 Schematic diagram of the connection between the sorting trolley and the X-axis mobile rack.

[0055] Fig.11 This is a schematic diagram of the structure of the sorting cart in this application.

[0056] Fig.12 It is a structural schematic diagram of the feeding and packaging mechanism in this application.

[0057] Fig.13 for Fig.12 The schematic diagram of the coordination of multiple groups of feeding belt conveyor mechanisms is a side view.

[0058] Fig.14 and Fig.15 It is a schematic diagram of the structure of the blanking mechanism in this application at different viewing angles.

[0059] Fig.16 for Fig.15 Enlarged view of circle B.

[0060] Fig.17 This is a structural diagram of the second embodiment of the package supply and sorting system in the present application, in which the material receiving mechanism is omitted.

[0061] Fig.18 This is a structural diagram of Example 3 of the package supply and sorting system in the present application, in which the material receiving mechanism is omitted.

[0062] Fig.19 for Fig.18 Top view of the .

[0063] Component number description

[0064] 10 Fixed frame

[0065] 101 Material feeding and packaging station

[0066] 102 Car movement empty area

[0067] 103 Gantry

[0068] 104 Fixed connecting rod

[0069] 20 Material feeding and packaging mechanism

[0070] 21 Loading and bag feeding rack

[0071] 22 Feeding belt conveyor mechanism

[0072] 23 Grating Sensor

[0073] 24 Detection of opening

[0074] 30 Sorting trolley

[0075] 31 Car frame

[0076] 32 Material transfer belt conveyor

[0077] 321 Transfer conveyor belt

[0078] 322 gear bar

[0079] 331 First sorting car

[0080] 332 Second sorting trolley

[0081] 333 The third sorting car

[0082] 334 Fourth sorting car

[0083] 40 Blanking mechanism

[0084] 41 Blanking chute

[0085] 42 chute bottom plate

[0086] 421 Bending and fixing part

[0087] 422 Piercing

[0088] 423 Locking strip hole

[0089] 43 chute baffle

[0090] 44 Cushion

[0091] 441 Silicone Strip

[0092] 45 Fixed pressure plate

[0093] 451 Platen Horizontal Section

[0094] 452 vertical part of pressure plate

[0095] 453 External fixing hole

[0096] 454 inner fixing hole

[0097] 46 reinforcement plate

[0098] 50 Material receiving mechanism

[0099] 51 Material receiving frame

[0100] 60 Sorting drive mechanism

[0101] 61 X Guide Rail

[0102] 62 X-direction moving drive source

[0103] 63 X-axis moving rack

[0104] 64 Y-axis moving drive source

[0105] 65 Y guide rail

[0106] 66 First synchronous belt drive assembly

[0107] 661 First driving pulley

[0108] 662 First driven pulley

[0109] 663 First Timing Belt

[0110] 67 Second synchronous belt drive assembly

[0111] 671 Second driving pulley

[0112] 672 Second driven pulley

[0113] 673 Second timing belt

[0114] 68 First driving shaft

[0115] 69 Second driving shaft

[0116] 610 Travel Wheel

[0117] 611 Guide wheel DETAILED DESCRIPTION

[0118] The following is a description of the implementation of the present invention by means of specific embodiments. Those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.

[0119] It should be noted that the structures, proportions, sizes, etc. drawn in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the present invention, so they have no substantial technical significance. Any modification of the structure, change of the proportional relationship or adjustment of the size should still fall within the scope of the technical content disclosed by the present invention without affecting the effects and purposes that can be achieved by the present invention. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" quoted in this specification are only for the convenience of description, and are not used to limit the scope of the implementation of the present invention. The change or adjustment of their relative relationship should also be regarded as the scope of the implementation of the present invention without substantially changing the technical content.

[0120] It should also be noted that when an element is referred to as being "fixed on" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element at the same time. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or may be indirectly connected to the other element through an intermediate element.

[0121] In addition, the descriptions of "first", "second", etc. in this application are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in this field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0122] The present application provides a central package sorting system and a central package sorting method using the central package sorting system for automatically sorting multiple express parcels. Figure 1 and Figure 2 As shown, or Fig.17 and Fig.18 As shown, or Fig.19 As shown, the central package supply and sorting system involved in the present application includes a fixed frame 10 and a loading and supplying mechanism 20, both of which are fixedly installed, at least one sorting trolley 30 movably installed on the fixed frame 10, a plurality of blanking chutes 41, both of which are installed on the fixed frame 10, and a material receiving mechanism 50 arranged on the outer side of the fixed frame 10. The sorting trolley 30 can reciprocate between the loading and supplying mechanism 20 and the blanking chute 41. The material receiving mechanism 50 has a plurality of material receiving frames 51 corresponding one by one to the blanking chutes 41, and the frame of the material receiving mechanism 50 is a movable structure.

[0123] The central package supply and sorting system involved in this application is a non-terminal package supply structure. Specifically, Figure 1 and Figure 2 As shown, a loading and packaging station 101 is provided in the fixed frame 10, and a loading and packaging mechanism 20 is arranged at the loading and packaging station 101 of the fixed frame 10. In addition, the fixed frame 10 is provided with a material drop chute 41 and a material receiving mechanism 50 on different sides of the loading and packaging mechanism 20, thereby realizing that the sorting trolley 30 receives the sorted objects (such as express mail) at the loading and packaging station 101, and then the sorting trolley 30 moves to different sides of the loading and packaging station 101 to transfer materials.

[0124] Furthermore, the present application also provides a central package sorting method using the central package sorting system, the central package sorting method comprising the following steps:

[0125] Step S1, placing a plurality of sorted objects in order on the feeding and packaging mechanism 20, and the feeding and packaging mechanism 20 transports the sorted objects toward the fixed frame 10. In this embodiment, the feeding and packaging mechanism 20 transports the sorted objects forward, and the feeding direction of the feeding and packaging mechanism 20 is the forward direction;

[0126] Step S2, the sorting trolley 30 moves to the feeding and packaging mechanism 20;

[0127] Step S3, the sorting trolley 30 receives the sorted objects output by the feeding and packaging mechanism 20;

[0128] Step S4, the sorting trolley 30 moves to the drop chute 41 corresponding to the sorted object on the sorting trolley 30;

[0129] Step S5, the sorting trolley 30 unloads the sorted object thereon, and the sorted object falls into the receiving frame 51 corresponding to the sorting chute 41 through the material dropping chute 41; thus, the automatic sorting of one sorted object is completed;

[0130] Step S6, the sorting trolley 30 moves back to the feeding and packaging mechanism 20;

[0131] Step S7, repeat steps S3 to S6 to complete the automatic sorting of multiple sorted objects in sequence; in the process of repeating steps S3 to S6 to sort multiple sorted objects, step S4 will be executed multiple times; in the multiple executed step S4, based on the structure that the fixed frame 10 is provided with a blanking chute 41 and a material receiving mechanism 50 on different sides of the loading and packaging mechanism 20, the sorting trolley 30 can move and feed materials toward the blanking chute 41 distributed on different sides of the loading and packaging mechanism 20, and is no longer limited to feeding materials to the same side of the loading and packaging mechanism 20 as in the prior art.

[0132] Therefore, the present application sets the feeding station 101 and the feeding mechanism 20 at the non-terminal position in the extension direction of the fixed frame 10, so that the fixed frame 10 is provided with a blanking chute 41 and a receiving mechanism 50 on different sides of the feeding station 101 and the feeding mechanism 20, which is a central feeding structure, or a non-terminal feeding structure. Compared with the terminal feeding structure in the prior art in which the feeding station 101 and the feeding mechanism 20 are set at one end of the extension direction of the fixed frame 10, under the premise of configuring the same number of blanking chutes 41, the present application can shorten the moving distance of the sorting trolley 30 in the extension direction of the fixed frame 10 during a single sorting, thereby shortening the time required for a single sorting; under the premise of the same moving distance of the sorting trolley 30, the present application can configure a larger number of blanking chutes 41; finally, the present application effectively improves the sorting efficiency.

[0133] In the central package supply and sorting system involved in the present application, the fixed frame 10 has various forms. The fixed frame 10 can be a straight-line frame extending in one direction as a whole, or an L-shaped frame or a T-shaped frame extending in multiple directions as a whole. Based on the fixed frame 10 of different forms and the movable driving structure of the sorting trolley 30 in the fixed frame 10, the central package supply and sorting system has multiple embodiments. The following provides several preferred embodiments of the central package supply and sorting system.

[0134] Example 1 of the central package supply and sorting system

[0135] like Figure 1 and Figure 2 As shown, the fixed frame 10 is in a straight line shape and extends straightly in a direction perpendicular to the feeding direction of the feeding and packaging mechanism 20, that is, the fixed frame 10 extends in the left-right direction, and the extension direction of the fixed frame 10 is its length direction. Therefore, in the first embodiment of the central packaging sorting system, the length direction of the fixed frame 10 is the left-right direction, that is, Figure 2 The left and right directions of the paper in the view; the width direction of the fixed frame 10 is the front and rear direction, that is Figure 2 The vertical direction of the paper in the drawing; the height direction of the fixed frame 10 is the vertical direction, that is, Figure 2 The front and back orientation of the paper in the view.

[0136] like Figure 1 and Figure 2 As shown, based on the fixed frame 10 of the straight-line structure, the feeding and packaging station 101 is arranged at a non-end position in the length direction of the fixed frame 10, that is, the feeding and packaging station 101 and the feeding and packaging mechanism 20 are not arranged at the left end or the right end of the fixed frame 10, but are arranged at a certain position between the left end and the right end of the fixed frame 10. In the direction perpendicular to the feeding direction of the feeding and packaging mechanism 20, the first embodiment of the central feeding and packaging sorting system is provided with sorting subsystems on the left and right sides of the feeding and packaging station 101 and the feeding and packaging mechanism 20, and each sorting subsystem includes a part of the fixed frame 10, a blanking chute 41 and a material receiving mechanism 50.

[0137] Furthermore, in the first embodiment of the central package supply and sorting system, the loading and supplying station 101 and the loading and supplying mechanism 20 can be arranged in various positions in the length direction of the fixed frame 10, such as being arranged in the middle right part of the fixed frame 10, or being arranged in the middle left part of the fixed frame 10, or being arranged in the middle part of the fixed frame 10. The specific arrangement position can be determined according to actual needs. In this embodiment, Figure 1 and Figure 2As shown, along the length direction of the fixed frame 10, the feeding station 101 and the feeding mechanism 20 are both arranged at the middle position of the fixed frame 10. In addition, along the width direction of the fixed frame 10, the feeding mechanism 20 is arranged at the rear side of the fixed frame 10, and the feeding mechanism 20 conveys the sorted objects forward.

[0138] Furthermore, if Figure 1 and Figure 2 As shown, in each sorting subsystem, the fixed frame 10 is provided with a material-dropping mechanism 40 on both sides of the front and rear perpendicular to its extension direction. That is, the front side of the fixed frame 10 is provided with two groups of material-dropping mechanisms 40 respectively distributed on the left and right sides of the loading and packaging station 101 and the loading and packaging mechanism 20, and the rear side of the fixed frame 10 is also provided with two groups of material-dropping mechanisms 40 respectively distributed on the left and right sides of the loading and packaging station 101 and the loading and packaging mechanism 20, each group of material-dropping mechanisms 40 has a plurality of material-dropping chutes 41, and each group of material-dropping mechanisms 40 is provided with a group of material-receiving mechanisms 50 on the outer sides in the front and rear directions. Therefore, in the first embodiment of the centrally placed packaging sorting system, four groups of matched material-dropping mechanisms 40 and material-dropping chutes 41 are provided, thereby improving the sorting efficiency. Based on this structure, the fixed frame 10 includes two front and rear gantries 103, and several fixed connecting rods 104 fixedly connected between the front and rear gantries 103. A trolley movement space 102 is formed between the front and rear gantries 103 to allow the sorting trolley 30 to move. The left and right groups of blanking mechanisms 40 on the front side are fixed to the front gantry 103, and the left and right groups of blanking mechanisms 40 on the rear side are fixed to the rear gantry 103. The trolley movement space 102 is also formed between the front and rear groups of blanking mechanisms 40 in each sorting subsystem. The gantry 103 is provided with a space constituting a loading and packaging station 101 at least in its middle position.

[0139] Furthermore, in the first embodiment of the central package supply and sorting system, the number of sorting carts 30 movably mounted between the front and rear gantries 103 in the fixed frame 10 is at least one, and the sorting carts 30 can be 1, 2, 4, or more, and the number of sorting carts 30 is determined according to actual needs. The configuration of more sorting carts 30 is conducive to improving the sorting efficiency. Based on the different numbers of sorting carts 30, the first embodiment of the central package supply and sorting system has multiple structures. Moreover, in the first embodiment of the central package supply and sorting system, the sorting cart 30 reciprocates between the loading and feeding mechanism 20 and the blanking chute 41 in the form of left-right translation and up-and-down translation. The following provides three preferred structures of the first embodiment of the central package supply and sorting system.

[0140] Example 1 of a central package supply and sorting system with a single vehicle structure

[0141] like Figure 3As shown, the first embodiment of the central package supply and sorting system is a single-cart structure, that is, one sorting trolley 30 is configured, and one sorting trolley 30 can move in the left and right side areas of the loading and supply station 101 along the length direction of the fixed frame 10, that is, after the sorting trolley 30 takes materials from the loading and supply package, it can move horizontally to the left and to the right.

[0142] Furthermore, the movement mode of a single sorting trolley 30 in the fixed frame 10 is: moving left and right along the length direction of the fixed frame 10, and lifting and lowering along the height direction of the fixed frame 10. Based on this, a single sorting trolley 30 can be installed on the fixed frame 10 in a manner that it can be moved left and right and can be lifted and lowered through a set of sorting transmission mechanisms 60. The preferred structure of the sorting transmission mechanism 60 is as follows: Figure 3 and Figure 4 As shown, the sorting transmission mechanism 60 includes an X-guide rail 61 fixed to the fixed frame 10, an X-moving drive source 62, an X-moving frame 63 slidably matched with the X-guide rail 61, a Y-moving drive source 64, and a Y-guide rail 65 fixed to the X-moving frame 63; the X-guide rail 61 extends straightly left and right along the length direction of the fixed frame 10, and the left and right ends of the X-guide rail 61 extend to the left and right ends of the fixed frame 10 respectively, so that the X-guide rail 61 spans the left and right groups of blanking mechanisms 40 and the loading and packaging station 101 in its length direction; the Y-guide rail 65 extends straight up and down along the height direction of the fixed frame 10; the X-moving drive source 62 is transmission-connected with the X-moving frame 63 to drive the X-moving frame 63 to translate left and right along the X-guide rail 61; the sorting trolley 30 is slidably matched with the Y-guide rail 65, and the Y-moving drive source 64 is transmission-connected with the sorting trolley 30 to drive the sorting trolley 30 to translate up and down along the Y-guide rail 65. In addition, in the central package supply and sorting system with a single vehicle structure, the X-direction guide rail 61 is arranged at the middle position between the front and rear gantries 103 in the front and rear directions, and the X-direction movable frame 63 is a square column structure.

[0143] Furthermore, if Figure 3 and Figure 4As shown, the X-direction moving driving source 62 is an X-direction driving motor fixed on the top of the fixed frame 10, and the Y-direction moving driving source 64 is a Y-direction driving motor fixed on the top of the X-direction moving frame 63. The X-direction driving motor is connected to the X-direction moving frame 63 through a first synchronous belt transmission assembly 66, and the first synchronous belt transmission assembly 66 includes a first driving pulley 661 and a first driven pulley 662 both rotatably supported in the fixed frame 10, and a first synchronous belt 663 connected to the outer periphery of the first driving pulley 661 and the first driven pulley 662, the X-direction driving motor is connected to the first driving pulley 661, and the first synchronous belt 663 is fixedly connected to the X-direction moving frame 63. The Y-direction driving motor is connected to the sorting trolley 30 through the second synchronous belt transmission assembly 67, and the second synchronous belt transmission assembly 67 includes a second driving pulley 671 and a second driven pulley 672, both of which are rotatably supported in the X-direction moving frame 63, and a second synchronous belt 673 connected to the outer periphery of the second driving pulley 671 and the second driven pulley 672. The Y-direction driving motor is connected to the second driving pulley 671, and the second synchronous belt 673 is fixedly connected to the sorting trolley 30. The first driving pulley 661 and the first driven pulley 662 are respectively mounted at the left and right ends of the fixed frame 10, so that the extension path of the first synchronous belt 663 covers the loading and packaging station 101; the second driving pulley 671 and the second driven pulley 672 are respectively mounted at the upper and lower ends of the X-direction moving frame 63, so that the extension path of the second synchronous belt 673 covers the loading and packaging station 101. In this way, the first synchronous belt 663 pulls the X-axis movable frame 63 and the sorting trolley 30 to move left and right, and the second synchronous belt 673 pulls the sorting trolley 30 to move up and down, so that the sorting trolley 30 can move to the loading and packaging station 101. In this embodiment, the sorting trolley 30 can move to the rear lower end of the loading and packaging mechanism 20 to receive the sorted objects output forward by the loading and packaging mechanism 20.

[0144] Preferably, if Figure 3 As shown, there are two upper and lower X-direction guide rails 61, the top of the X-direction moving frame 63 slides with the upper X-direction guide rail 61, and the bottom of the X-direction moving frame 63 slides with the lower X-direction guide rail 61; and the X-direction driving motor is connected to the X-direction moving frame 63 through the upper and lower sets of first synchronous belt transmission components 66, thereby improving the stability of the left and right translation of the X-direction moving frame 63. The sorting transmission mechanism 60 also includes a first active shaft 68 extending up and down and rotatably mounted on the left side of the fixed frame 10 through a bearing seat, the upper end of the first active shaft 68 is fixedly connected to the motor shaft of the X-direction driving motor through a coupling, and the first active pulley 661 in the upper and lower sets of first synchronous belt transmission components 66 is fixedly locked on the first active shaft 68 by screws.

[0145] Preferably, if Figure 3 and Figure 4As shown, several rotatable running wheels 610 and several rotatable guide wheels 611 are installed on the top and bottom of the X-axis movable frame 63; the axis of the running wheel 610 extends straight forward and backward, and the running wheel 610 is assembled in the guide rail groove of the X-axis guide rail 61; the axis of the guide wheel 611 extends straight up and down, and the guide wheel 611 abuts against the front and rear sides of the X-axis guide rail 61.

[0146] Example 1 of a central package supply and sorting system with a double-car structure

[0147] like Figure 5 As shown, the first embodiment of the central package supply and sorting system is a double-cart structure, that is, two sorting carts 30 are configured, and the two sorting carts 30 can move in the left and right side areas of the loading and supply station 101 along the length direction of the fixed frame 10, that is, after the two sorting carts 30 respectively take materials from the loading and supply packages, each sorting cart 30 can translate to the left as well as to the right.

[0148] Furthermore, the two sorting carts 30 move in the fixed frame 10 in the following ways: moving left and right along the length direction of the fixed frame 10, and lifting and lowering along the height direction of the fixed frame 10. Based on this, each sorting cart 30 is installed on the fixed frame 10 through a set of sorting transmission mechanisms 60 so as to be movable left and right and liftable. Figure 5 As shown, the structure of each set of sorting transmission mechanism 60 is the same as the structure of the sorting transmission mechanism 60 in the embodiment 1 of the central package sorting system with a single vehicle structure, and also has a fixed X-guide rail 61, an X-axis movable frame 63 slidingly matched with the X-guide rail 61, an X-axis movable driving source 62 that drives the X-axis movable frame 63 to move left and right along the X-guide rail 61 through two upper and lower sets of first synchronous belt transmission components 66, a Y-guide rail 65 fixed to the X-axis movable frame 63, and a Y-axis movable driving source 64 that drives the sorting trolley 30 to move up and down along the Y-guide rail 65 through a second synchronous belt transmission component 67. The first driving pulley 661 and the first driven pulley 662 are respectively assembled at the left and right ends of the fixed frame 10, so that the extension path of the first synchronous belt 663 covers the loading and packaging station 101; the second driving pulley 671 and the second driven pulley 672 are respectively assembled at the upper and lower ends of the X-axis movable frame 63, so that the extension path of the second synchronous belt 673 covers the loading and packaging station 101.

[0149] But the difference is: in the embodiment 1 of the central package supply and sorting system with a double-car structure, Figure 5As shown, a pair of X-direction guide rails 61 in the sorting transmission mechanism 60 connected to one of the sorting carts 30 is arranged on the front side of the rear gantry 103 in the front-to-back direction, and the X-direction moving frame 63 in the group moves horizontally next to the front side of the rear gantry 103. A pair of X-direction guide rails 61 in the sorting transmission mechanism 60 connected to another sorting cart 30 is arranged on the rear side of the front gantry 103 in the front-to-back direction, and the X-direction moving frame 63 in the group moves horizontally next to the rear side of the front gantry 103. And, as Figure 7 As shown, the X-direction moving frame 63 is a flat frame that is very narrow in the front-to-back direction, and the end of the sorting trolley 30 in the front-to-back direction is mounted on the X-direction moving frame 63, which is a cantilever mounting structure. In the front-to-back direction, the gap between the end of the sorting trolley 30 extending from the X-direction moving frame 63 and the gantry 103 on the opposite side of the X-direction moving frame 63 allows the X-direction moving frame 63 in another set of sorting transmission mechanisms 60 to pass through. In this way, when two sets of sorting transmission mechanisms 60 are used to independently drive two sorting trolleys 30 to translate left and right and up and down, it is ensured that the X-direction moving frames 63 in the two sets of sorting transmission mechanisms 60 do not interfere with each other.

[0150] Preferably, if Figure 7 As shown, the Y-direction moving motor drives the sorting trolley 30 to translate up and down along the Y-direction guide rail 65 through the left and right sets of second synchronous belt transmission assemblies 67. The two sets of second synchronous belt transmission assemblies 67 are respectively installed on the left and right edges of the X-direction moving frame 63, so as to improve the stability of driving the sorting trolley 30 of the cantilever mounting structure to translate up and down. Based on this, each set of sorting transmission mechanism 60 also includes a second driving shaft 69 extending left and right and rotatably installed on the top of the X-direction moving frame 63 through a bearing seat. The right end of the second driving shaft 69 is fixedly connected to the motor shaft of the Y-direction driving motor through a coupling, and the second driving pulleys 671 in the left and right sets of second synchronous belt transmission assemblies 67 are fixedly locked on the second driving shaft 69 by screws.

[0151] Preferably, if Figure 6 and Figure 7 As shown, several rotatable running wheels 610 and several rotatable guide wheels 611 are installed on the top and bottom of each X-axis movable frame 63; the axis of the running wheel 610 extends straight forward and backward, and every two running wheels 610 form a group and are installed on the same wheel axle, and the two running wheels 610 in each group abut against the front and rear sides of the X-axis guide rail 61; the axis of the guide wheel 611 extends straight up and down, and the guide wheel 611 abuts against the front and rear sides of the X-axis guide rail 61.

[0152] Example 1 of a central package supply and sorting system with four vehicles

[0153] like Figure 8 and Fig. 9As shown, the first embodiment of the central package supply and sorting system is a four-car structure, that is, four sorting carts 30 are configured. For the convenience of description, the four sorting carts 30 are respectively defined as a first sorting cart 331, a second sorting cart 332, a third sorting cart 333 and a fourth sorting cart 334. Among them, in the length direction of the fixed frame 10, the first sorting trolley 331 and the second sorting trolley 332 are located in the area on the left side of the loading and packaging station 101, and the first sorting trolley 331 and the second sorting trolley 332 are set to move only in the area on the left side of the loading and packaging station 101, and cannot move to the area on the right side of the loading and packaging station 101; the third sorting trolley 333 and the fourth sorting trolley 334 are located in the area on the right side of the loading and packaging station 101, and the third sorting trolley 333 and the fourth sorting trolley 334 are set to move only in the area on the right side of the loading and packaging station 101, and cannot move to the area on the left side of the loading and packaging station 101. In this way, it is ensured that the four sorting trolleys 30 do not interfere with each other during the sorting process.

[0154] Furthermore, the four sorting carts 30 move in the fixed frame 10 in the following ways: moving left and right along the length direction of the fixed frame 10, and lifting and lowering along the height direction of the fixed frame 10. Based on this, each sorting cart 30 is installed on the fixed frame 10 through a set of sorting transmission mechanisms 60 so as to be movable left and right and liftable. Figures 8 to 10 As shown, the structure of each set of sorting transmission mechanism 60 is the same as the structure of the sorting transmission mechanism 60 in the embodiment 1 of the central package sorting system with a double-car structure, and also has a fixed X-guide rail 61, an X-axis movable frame 63 that slides with the X-guide rail 61 and is a flat frame, an X-axis movable drive source 62 that drives the X-axis movable frame 63 to move left and right along the X-guide rail 61 through two upper and lower sets of first synchronous belt transmission assemblies 66, a Y-guide rail 65 fixed to the X-axis movable frame 63, and a Y-axis movable drive source 64 that drives the sorting trolley 30 to move up and down along the Y-guide rail 65 through two left and right sets of second synchronous belt transmission assemblies 67.

[0155] But the difference is that: in the first embodiment of the central package supply and sorting system with four vehicles, Figure 8 and Fig. 9As shown, the rear end of the first sorting trolley 331 is installed on the left rear side X-direction moving frame 63, and the rear end of the third sorting trolley 333 is installed on the right rear side X-direction moving frame 63. The left rear side X-direction moving frame 63 and the right rear side X-direction moving frame 63 are aligned in the width direction of the fixed frame 10 (that is, they are both distributed on the rear side of the fixed frame 10), and are distributed on the left and right sides of the loading and packaging station 101 in the length direction of the fixed frame 10, so that the upper ends of the left rear side X-direction moving frame 63 and the right rear side X-direction moving frame 63 share the same rear side X-direction guide rail 61, and the lower ends also share the same rear side X-direction guide rail 61. Similarly, the front end of the second sorting trolley 332 is installed on the left front X-direction moving frame 63, and the front end of the fourth sorting trolley 334 is installed on the right front X-direction moving frame 63. The left front X-direction moving frame 63 and the right front X-direction moving frame 63 are aligned in the width direction of the fixed frame 10 (that is, they are both distributed on the front side of the fixed frame 10), and are distributed on the left and right sides of the loading and packaging station 101 in the length direction of the fixed frame 10, so that the upper ends of the left front X-direction moving frame 63 and the right front X-direction moving frame 63 share the same front X-direction guide rail 61, and the lower ends also share the same front X-direction guide rail 61, so that the overall structure of the central packaging sorting system is compact and the cost is reduced.

[0156] Furthermore, the two sets of first synchronous belt drive assemblies 66 connected to the two X-direction moving frames 63 sharing the same X-direction guide rail 61 are staggered in the width direction of the fixed frame 10. Take the left rear X-direction moving frame 63 and the right rear X-direction moving frame 63 sharing the same rear X-direction guide rail 61 as an example: Fig. 9As shown, in the sorting transmission mechanism 60 where the left rear side X-axis movable frame 63 is located, the first active pulley 661 is arranged at the left end of the fixed frame 10, and the first driven pulley 662 is arranged at the right end of the loading and packaging station 101, so that the extension path of the first synchronous belt 663 in the sorting transmission mechanism 60 covers the loading and packaging station 101; and, the first active pulley 661 and the first driven pulley 662 in the sorting transmission mechanism 60 are both arranged on the rear side of the X-guide rail 61 (i.e., the outer side in the width direction), so that the first synchronous belt 663 in this group of sorting transmission mechanisms 60 is distributed on the rear side of the X-guide rail 61 (i.e., the outer side in the width direction). In the sorting transmission mechanism 60 where the right rear side X-direction moving frame 63 is located, the first driving pulley 661 is arranged at the right end of the fixed frame 10, and the first driven pulley 662 is arranged at the left end of the loading and packaging station 101, so that the extension path of the first synchronous belt 663 in the sorting transmission mechanism 60 covers the loading and packaging station 101; and the first driving pulley 661 and the first driven pulley 662 in the sorting transmission mechanism 60 are both arranged on the front side of the X-direction guide rail 61 (i.e., the inner side in the width direction), which means that the first synchronous belt 663 in the group of sorting transmission mechanisms 60 is distributed on the front side of the X-direction guide rail 61 (i.e., the inner side in the width direction). In this way, the first synchronous belt transmission components 66 of the two X-direction moving frames 63 that drive the same X-direction guide rail 61 to move left and right are staggered front and back to avoid mutual interference.

[0157] Preferably, if Fig.10 As shown, several rotatable running wheels 610 and several rotatable guide wheels 611 are installed on the top and bottom of each X-axis movable frame 63; the axis of the running wheel 610 extends straight forward and backward, and every two running wheels 610 form a group and are installed on the same wheel axle, and the two running wheels 610 in each group abut against the front and rear sides of the X-axis guide rail 61; the axis of the guide wheel 611 extends straight up and down, and the guide wheel 611 abuts against the front and rear sides of the X-axis guide rail 61.

[0158] Example 2 of the central package supply and sorting system

[0159] like Fig.17 As shown, the fixed frame 10 is L-shaped, and the fixed frame 10 has a corner; the loading and packaging station 101 and the loading and packaging mechanism 20 are both arranged at the corner of the fixed frame 10 along the extension direction of the fixed frame 10. Along the loading direction of the loading and packaging mechanism 20, the fixed frame 10 is provided with a sorting subsystem on the opposite side (i.e., the front side) of the loading and packaging mechanism 20; along the direction perpendicular to the loading direction of the loading and packaging mechanism 20, the fixed frame 10 is provided with a sorting subsystem on the left side or the right side of the loading and packaging mechanism 20. Therefore, the second embodiment of the central packaging sorting system has two sorting subsystems, each of which includes a part of the fixed frame 10, the blanking chute 41 and the material receiving mechanism 50. Fig.17 In the second embodiment of the central package supply and sorting system shown, two sorting subsystems are respectively arranged at the front side and the right side of the loading and supply station 101 and the loading and supply mechanism 20.

[0160] Furthermore, if Fig.17 As shown, in each sorting subsystem, the fixed frame 10 is provided with a blanking mechanism 40 on both sides perpendicular to its extension direction, and a trolley movement space 102 is formed between the two groups of blanking mechanisms 40 to allow the sorting trolley 30 to move. Specifically, in the sorting subsystem distributed in the front side of the loading and packaging station 101 and the loading and packaging mechanism 20, this part of the fixed frame 10 extends straight along the front and rear direction, and each of the left and right sides of the fixed frame 10 is provided with a group of blanking mechanisms 40 distributed in the front side of the loading and packaging station 101 and the loading and packaging mechanism 20, and each group of blanking mechanisms 40 is configured with a group of receiving mechanisms 50 on the outer side in the left and right directions; this part of the fixed frame 10 includes two left and right gantries 103, and several fixed connecting rods 104 fixedly connected between the left and right gantries 103, and the trolley movement space 102 is formed between the left and right gantries 103. In the sorting subsystem distributed on the right side of the feeding station 101 and the feeding mechanism 20, this part of the fixed frame 10 extends straightly in the left-right direction, and each of the front and rear sides of the fixed frame 10 is provided with a group of blanking mechanisms 40 distributed on the right side of the feeding station 101 and the feeding mechanism 20, and each group of blanking mechanisms 40 is configured with a group of receiving mechanisms 50 on the outer side in the front-to-back direction; the fixed frame 10 includes two front and rear gantries 103, and several fixed connecting rods 104 fixedly connected between the front and rear gantries 103, and the trolley movement space 102 is formed between the left and right gantries 103. Therefore, the feeding station 101 and the feeding mechanism 20 are formed at the junction of the part of the fixed frame 10 extending front and rear and the fixed frame 10 extending left and right.

[0161] Of course, in other embodiments, the fixed frame 10 may also be V-shaped, and the loading and packaging station 101 and the loading and packaging mechanism 20 are both arranged at the corners of the fixed frame 10 along the extension direction of the fixed frame 10 .

[0162] Example 3 of the central package supply and sorting system

[0163] like Fig.18 and Fig.19As shown, the fixed frame 10 is T-shaped, and the fixed frame 10 has a corner; the loading and packaging station 101 and the loading and packaging mechanism 20 are both arranged at the corner of the fixed frame 10 along the extension direction of the fixed frame 10. Along the loading direction of the loading and packaging mechanism 20, the fixed frame 10 is provided with a sorting subsystem on the opposite side (i.e., the front side) of the loading and packaging mechanism 20; along the direction perpendicular to the loading direction of the loading and packaging mechanism 20, the fixed frame 10 is provided with a sorting subsystem on the left and right sides of the loading and packaging mechanism 20. Therefore, the third embodiment of the central packaging sorting system has three sorting subsystems, each of which includes a part of the fixed frame 10, a blanking chute 41, and a material receiving mechanism 50.

[0164] Furthermore, if Fig.18 and Fig.19 As shown, in each sorting subsystem, the fixed frame 10 is provided with a blanking mechanism 40 on both sides perpendicular to its extension direction, and a trolley movement space 102 is formed between the two groups of blanking mechanisms 40 to allow the sorting trolley 30 to move. Specifically, in the sorting subsystem distributed in the front side of the loading and packaging station 101 and the loading and packaging mechanism 20, this part of the fixed frame 10 extends straight along the front and rear direction, and each of the left and right sides of the fixed frame 10 is provided with a group of blanking mechanisms 40 distributed in the front side of the loading and packaging station 101 and the loading and packaging mechanism 20, and each group of blanking mechanisms 40 is configured with a group of receiving mechanisms 50 on the outer side in the left and right directions; this part of the fixed frame 10 includes two left and right gantries 103, and several fixed connecting rods 104 fixedly connected between the left and right gantries 103, and the trolley movement space 102 is formed between the left and right gantries 103. In the sorting subsystem distributed on the left and right sides of the loading and packaging station 101 and the loading and packaging mechanism 20, this part of the fixed frame 10 extends straightly in the left and right directions, and the front and rear sides of the left part of the fixed frame 10 are respectively provided with a group of blanking mechanisms 40 distributed on the left sides of the loading and packaging station 101 and the loading and packaging mechanism 20, and the front and rear sides of the right part of the fixed frame 10 are respectively provided with a group of blanking mechanisms 40 distributed on the right sides of the loading and packaging station 101 and the loading and packaging mechanism 20; each group of blanking mechanisms 40 is configured with a group of receiving mechanisms 50 on the outer sides in the front and rear directions; the left part of the fixed frame 10 and the right part of the fixed frame 10 both include two front and rear gantries 103, and several fixed connecting rods 104 fixedly connected between the front and rear gantries 103, and the trolley movement space 102 is formed between the left and right gantries 103. Therefore, the loading and packaging station 101 and the loading and packaging mechanism 20 are formed at the junction of the fixed frame 10 extending frontward and rearward and the fixed frame 10 extending leftward and rightward, and are located in the middle position of the fixed frame 10 extending leftward and rightward.

[0165] Furthermore, in the second and third embodiments of the above-mentioned central package supply and sorting system, the movement mode of the sorting trolley 30 is translation along the extension direction of the fixed frame 10, and translation along the up-down direction. Based on this, the sorting trolley 30 preferably adopts a two-trolley structure, that is, the sorting trolley 30 includes a transverse trolley that translates along the extension direction of the fixed frame 10, and a lifting trolley that translates along the up-down direction, and each sorting subsystem is equipped with a lifting trolley and several transverse trolleys on the fixed frame 10, and the several transverse trolleys are distributed up and down, corresponding to the upper and lower multi-layer drop chutes 41 in the sorting subsystem, and the lifting trolleys are distributed on the outer peripheral side of the feeding and supplying mechanism 20. During the sorting operation, the lifting trolley receives the loading and packaging mechanism 20, and the loading and packaging mechanism 20 outputs the sorted objects to the lifting trolley. The lifting trolley moves up and down to the transverse trolley corresponding to the layer where the target blanking chute 41 is located, and outputs the sorted objects to the transverse trolley. The transverse trolley moves to the target blanking chute 41 and unloads the sorted objects on it. The sorted objects fall into the receiving frame 51 corresponding to the blanking chute 41 through the blanking chute 41.

[0166] Furthermore, in the three embodiments of the above-mentioned central package supply and sorting system, the structure of the sorting trolley 30 is preferably: Fig.11 As shown, the sorting trolley 30 includes a trolley frame 31, and a material transfer belt conveyor mechanism 32 installed on the trolley frame 31. The conveying direction of the material transfer belt conveyor mechanism 32 is forward and backward conveying, so the conveying direction of the material transfer belt conveyor mechanism 32 is perpendicular to the extension direction of the fixed frame 10 and consistent with the width direction of the fixed frame 10. In the first embodiment of the central package supply sorting system with a single-car structure, a double-car structure and a four-car structure, the trolley frame 31 can be installed on the X-axis movable frame 63 so as to be movable up and down, and is fixedly connected to the second synchronous belt 673. In the second and third embodiments of the central package supply sorting system, the trolley frame 31 of the transverse trolley can be installed on the fixed frame 10 so as to be movable horizontally, and the trolley frame 31 of the lifting trolley can be installed on the fixed frame 10 so as to be movable up and down.

[0167] Furthermore, if Fig.11As shown, the material transfer belt conveyor mechanism 32 includes a material transfer drive motor, a driving roller and a driven roller rotatably mounted on the trolley frame 31, and a material transfer conveyor belt 321 connected to the outer periphery of the driving roller and the driven roller. The material transfer drive motor is connected to the driving roller to drive the driving roller to rotate. The material transfer drive motor drives the material transfer conveyor belt 321 to make a rotary motion, so that the sorted objects on the material transfer conveyor belt 321 can be transported forward to the material drop chute 41 on the front side of the fixed frame 10, or the sorted objects on the material transfer conveyor belt 321 can be transported backward to the material drop chute 41 on the rear side of the fixed frame 10. Preferably, a plurality of stop bars 322 arranged side by side along the length direction of the material transfer conveyor belt 321 are fixed on the outer surface of the material transfer conveyor belt 321. The setting of the stop bar 322 has the following two functions: 1. It increases the surface friction of the material transfer conveyor belt 321, so that the sorted objects thereon are not easy to slip; 2. When the sorted objects are spherical, hemispherical or other special-shaped objects, the stop bar 322 has a stopping and limiting effect on the sorted objects, so that the special-shaped sorted objects are not easy to move around on the material transfer conveyor belt 321, thereby ensuring the accuracy of material transfer.

[0168] Furthermore, the sorting trolley 30 also has a detection component for zeroing control of the material transfer conveyor belt 321. The detection component has the following two preferred structures.

[0169] 1. The detection component is composed of a metal sheet and a proximity switch: the metal sheet is fixed to the left side or right side of one of the multiple bars 322, the proximity switch is fixed to the trolley frame 31, and is distributed on the same side as the bar 322, and the proximity switch can sense the metal sheet. In the initial state of the sorting trolley 30, the proximity switch can detect the metal sheet and the proximity switch is triggered; when the sorting trolley 30 receives the sorted objects and moves to the corresponding blanking chute 41, the proximity switch is in a triggered state. Afterwards, the material transfer drive motor is activated to drive the material transfer conveyor belt 321 to operate and unload the sorted objects; in this process, the metal sheet first moves away from the proximity switch and then gradually approaches the proximity switch. When the state of the proximity switch switches from being triggered to not being triggered and then to being triggered, it means that the unloading is completed. Afterwards, the material transfer drive motor reverses and drives the material transfer conveyor belt 321 to run in the opposite direction. The metal sheet moves away from the proximity switch again and then gradually approaches the proximity switch. The state of the proximity switch switches from being triggered to not being triggered and then to being triggered. At this time, the material transfer drive motor stops moving and the material transfer conveyor belt 321 returns to zero.

[0170] 2. The detection component is composed of a photoelectric sensor and a reflective plate: the photoelectric sensor and the reflective plate are fixed to the trolley frame 31 and are distributed opposite each other in the up and down directions; one of the photoelectric sensor and the reflective plate is distributed between the upper part and the lower part of the material transfer conveyor belt 321, and the other is distributed on the lower side of the material transfer conveyor belt 321, so that the material transfer conveyor belt 321 passes between the photoelectric sensor and the reflective plate, and a light-transmitting hole is provided on the material transfer conveyor belt 321; the light-transmitting hole can be moved to a position facing the reflective plate through the rotation of the material transfer conveyor belt 321. In the initial state of the sorting trolley 30, the light-transmitting hole faces the reflective plate, the light is not blocked, and the photoelectric sensor is triggered. When the sorting trolley 30 receives the sorted objects and moves to the corresponding drop chute 41, the proximity switches are in a triggered state. Afterwards, the material transfer drive motor starts to drive the material transfer conveyor belt 321 to operate and unload the sorted objects; during this process, the light-transmitting hole moves away from the reflective plate and then approaches the reflective plate, and the state of the photoelectric sensor switches from being triggered to not being triggered and then to being triggered, indicating that the unloading is completed. Afterwards, the material transfer drive motor reverses and drives the material transfer conveyor belt 321 to operate in the reverse direction, then the light-transmitting hole moves away from the reflective plate again and approaches the reflective plate again, and the state of the photoelectric sensor switches from being triggered to not being triggered and then to being triggered again, at which time, the material transfer drive motor stops and the material transfer conveyor belt 321 returns to zero.

[0171] Furthermore, in the three embodiments of the above-mentioned central package supply and sorting system, the structure of the feeding package supply mechanism 20 is preferably: Fig.12 As shown, the feeding and packaging mechanism 20 includes a fixed feeding and packaging frame 21, and a plurality of feeding belt conveyor mechanisms 22 installed on the feeding and packaging frame 21. The number of feeding belt conveyor mechanisms 22 can be two groups, three groups, or more groups, which can be set according to actual needs; the feeding and packaging frame 21 can be fixedly connected to the fixed frame 10, or can be fixedly installed separately by anchor bolts; the conveying direction of the feeding belt conveyor mechanism 22 is forward conveying. The plurality of feeding belt conveyor mechanisms 22 are connected in sequence from back to front along their conveying direction, and the driving sources of the plurality of feeding belt conveyor mechanisms 22 are independent of each other, that is, each group of feeding belt conveyor mechanisms 22 is driven by an independent motor, so that the conveying speed of each group of feeding belt conveyor mechanisms 22 is independently controlled. In this way, the buffering of the sorted objects on the plurality of feeding belt conveyor mechanisms 22 can be better controlled, so as to avoid excessive accumulation of the sorted objects in front and improve the efficiency of the equipment.

[0172] Preferably, the sorting trolley 30 receives materials from the loading and packaging mechanism 20 in the following manner: the sorting trolley 30 moves to the lower part of the front end of the loading and packaging mechanism 20, and multiple groups of loading belt conveyor mechanisms 22 convey the sorted objects forward, and the sorted objects fall from the front end of the loading belt conveyor mechanisms 22, and then fall on the sorting trolley 30 below, completing the material collection.

[0173] Furthermore, if Fig.11 and Fig.12 As shown, along the conveying direction of the feeding belt conveyor mechanism 22 conveying the sorted objects forward, the multiple groups of feeding belt conveyor mechanisms 22 are distributed in a stepped manner from high to low. The stepped distribution structure of the multiple groups of feeding belt conveyor mechanisms 22 can reduce the gap between the two adjacent groups of feeding belt conveyor mechanisms 22 to prevent the items from falling.

[0174] Furthermore, if Fig.11 As shown, the feeding and packaging mechanism 20 also includes a grating sensor 23 arranged on the outer side of each group of feeding belt conveyor mechanisms 22 and fixed to the feeding and packaging frame 21. The feeding and packaging frame 21 is provided with a detection opening 24 that allows the grating sensor 23 to be exposed. The grating sensor 23 has two functions: 1. It can detect the first sorted object on the feeding and packaging mechanism 20 passing forward and the last sorted object passing forward, so as to be used for sorting start control and sorting shutdown control; 2. It can detect the length of the sorted object conveyed on the feeding and packaging mechanism 20. When the length of the sorted object exceeds the threshold, it is judged as misplaced, and an alarm will be issued at this time, thereby improving the safety of the operation.

[0175] Furthermore, in the three embodiments of the above-mentioned central package supply and sorting system, the structure of the material dropping mechanism 40 is preferably as follows: Figure 1 and Fig.14 As shown, each set of blanking mechanisms 40 includes a plurality of chute bottom plates 42 arranged side by side up and down and fixed to the fixed frame 10, and a plurality of chute baffles 43 arranged side by side along the extension direction of the fixed frame 10 in the sorting subsystem in which the chute bottom plate 42 is located are fixed, and a blanking chute 41 is formed between two adjacent chute baffles 43 and the chute bottom plate 42; the chute bottom plate 42 is tilted in a manner of tilting outward and downward, so that the blanking chute 41 tilts outward and downward.

[0176] Preferably, if Fig.14 and Fig.15 As shown, a soft pad 44 extending toward the trolley movement empty area 102 is fixed at the inner edge of each chute bottom plate 42 near the trolley movement empty area 102. The soft pad 44 can reduce the gap between the cantilever end of the sorting trolley 30 and the inner end of the opposite side blanking chute 41, that is, reduce the gap between the sorting trolley 30 installed on the rear side X-direction moving frame 63 and the blanking chute 41 on the front side of the sorting trolley 30, and reduce the gap between the sorting trolley 30 installed on the front side X-direction moving frame 63 and the blanking chute 41 on the rear side of the sorting trolley 30, thereby avoiding parts from falling off. The soft pad 44 can be a whole piece of silicone pad, or it can be composed of multiple silicone strips 441. In this embodiment, Fig.14 and Fig.15As shown, the soft pad 44 includes a plurality of silicone strips 441 arranged side by side along the extension direction of the fixed frame 10 in the sorting subsystem in which it is located. The structure of multiple silicone strips 441 can reduce the resistance encountered by the sorting trolley 30 during movement. In this way, after repeated use, the wear of the silicone strips 441 can also be reduced, so that the service life of the silicone strips 441 is longer than that of the whole silicone pad.

[0177] Furthermore, the fixing structure of the plurality of silicone strips 441 at the inner edge of the chute bottom plate 42 is preferably: Fig.15 and Fig.16 As shown, a fixed pressing plate 45 is fixed to the bottom of the inner edge of the chute bottom plate 42. The fixed pressing plate 45 is L-shaped and includes a horizontal pressing plate portion 451 and a vertical pressing plate portion 452. The horizontal pressing plate portion 451 is provided with a plurality of fixing hole groups corresponding to the plurality of silicone strips 441. Each fixing hole group includes an outer fixing hole 453 and an inner fixing hole 454 arranged side by side. A bent fixing portion 421 bent downward is integrally provided at the inner edge of the chute bottom plate 42. The chute bottom plate 42 is provided with a plurality of through holes 422 corresponding to the plurality of silicone strips 441 at the bend between the bent fixing portion 421 and the bent portion. The silicone strip 441 sequentially passes downward into the outer fixing hole 453, then passes upward out of the inner fixing hole 454, and finally extends out of the through hole 422 to the inner side of the slide groove bottom plate 42; then the vertical portion 452 of the fixed pressing plate 45 is locked with the bent fixing portion 421 of the slide groove bottom plate 42 by bolts, thereby fixing the silicone strip 441 to the inner edge side of the slide groove bottom plate 42. After the silicone strip 441 is fixed, due to the installation method of passing downward into the outer fixing hole 453 and then passing upward out of the inner fixing hole 454, the silicone strip 441 has a U-shaped bent portion, which can make the silicone strip 441 more reliably fixed and prevent it from falling off during use.

[0178] Preferably, if Fig.15 and Fig.16 As shown, a locking circular hole is provided on the vertical portion 452 of the fixed pressing plate 45, and a locking long strip hole 423 extending up and down is provided on the bent fixed portion 421 of the chute bottom plate 42, and bolts for locking the fixed pressing plate 45 and the chute bottom plate 42 are inserted through the locking circular hole and the locking long strip hole 423. Based on the setting of the locking long strip hole 423, the height of the fixed pressing plate 45 relative to the chute bottom plate 42 can be adjusted, that is, the distance between the horizontal portion 451 of the pressing plate and the chute bottom plate 42 in the up and down direction can be adjusted, so that it is suitable for fixing silicone strips 441 of different diameters and shapes.

[0179] Preferably, if Fig.15 As shown, a plurality of reinforcing plates 46 are fixed to the bottom of the chute bottom plate 42 to improve the structural strength of the chute bottom plate 42 .

[0180] In summary, the present invention shortens the moving distance of the sorting trolley 30 in the length direction of the fixed frame 10 during a single sorting by using the central package supply structure, thereby shortening the time required for a single sorting, thereby improving the sorting efficiency. Therefore, the present invention effectively overcomes various shortcomings in the prior art and has a high industrial utilization value.

[0181] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by a person of ordinary skill in the art without departing from the spirit and technical concept disclosed by the present invention shall still be covered by the claims of the present invention.

Claims

1. A central package supply and sorting system, comprising a fixed frame (10) and a feeding and packaging mechanism (20) both fixedly installed, at least one sorting trolley (30) movably installed on the fixed frame (10), a plurality of blanking chutes (41) all installed on the fixed frame (10), and a receiving mechanism (50) arranged on the outer side of the fixed frame (10), wherein the sorting trolley (30) can reciprocate between the feeding and packaging mechanism (20) and the blanking chutes (41), and the receiving mechanism (50) has a plurality of receiving frames (51) corresponding to the blanking chutes (41), characterized in that: A loading and packaging station (101) is provided in the fixed frame (10), the loading and packaging mechanism (20) is arranged at the loading and packaging station (101) of the fixed frame (10), and the fixed frame (10) is provided with the blanking chute (41) and the material receiving mechanism (50) on different sides of the loading and packaging mechanism (20).

2. The central package supply and sorting system according to claim 1 is characterized in that: The fixed frame (10) is in a straight line shape, and the feeding direction of the feeding and packaging mechanism (20) is perpendicular to the extension direction of the fixed frame (10); along the extension direction of the fixed frame (10), the feeding and packaging station (101) and the feeding and packaging mechanism (20) are both arranged at the middle position of the fixed frame (10); The central package supply and sorting system is provided with sorting subsystems at both sides of the package supply and loading station (101) and the package supply and loading mechanism (20) in a direction perpendicular to the loading direction of the package supply and loading mechanism (20), and each sorting subsystem comprises a part of the fixed frame (10), a material dropping chute (41) and a material receiving mechanism (50).

3. The central package supply and sorting system according to claim 2 is characterized in that: The central package supply and sorting system is a single-vehicle structure, and one sorting trolley (30) is configured. One sorting trolley (30) can move along the extension direction of the fixed frame (10) in the area on both sides of the loading and supply station (101).

4. The central package supply and sorting system according to claim 2 is characterized in that: The central package supply and sorting system is a double-cart structure, and two sorting carts (30) are configured. The two sorting carts (30) can move along the extension direction of the fixed frame (10) in the area on both sides of the loading and supply station (101).

5. The central package supply and sorting system according to claim 2 is characterized in that: The central package supply and sorting system is a four-car structure, wherein four sorting carts (30) are configured, two of which are arranged in an area on one side of the fixed frame (10) along the extension direction thereof and are both movable within the area, and the remaining two sorting carts (30) are arranged in an area on the other side of the fixed frame (10) along the extension direction thereof and are both movable within the area.

6. The central package supply and sorting system according to any one of claims 3 to 5, characterized in that: Each of the sorting carts (30) is movably mounted on a fixed frame (10) via a set of sorting transmission mechanisms (60); Each set of sorting transmission mechanism (60) comprises an X-direction guide rail (61) fixed to a fixed frame (10), an X-direction moving driving source (62), an X-direction moving frame (63) slidably matched with the X-direction guide rail (61), a Y-direction moving driving source (64), and a Y-direction guide rail (65) fixed to the X-direction moving frame (63), wherein the X-direction guide rail (61) extends straightly along the extension direction of the fixed frame (10), and both ends extend to the two ends of the fixed frame (10) respectively, and the Y-direction guide rail (65) extends straightly up and down along the height direction of the fixed frame (10), the X-direction moving driving source (62) is connected to the X-direction moving frame (63) in driving connection, the sorting trolley (30) is slidably matched with the Y-direction guide rail (65), and the Y-direction moving driving source (64) is connected to the sorting trolley (30) in driving connection; The material loading and packaging stations (101) are distributed on a moving path where the X-direction moving frame (63) slides along the X-direction guide rail (61).

7. The central package supply and sorting system according to claim 6, characterized in that: The X-direction moving driving source (62) is an X-direction driving motor fixed to the fixed frame (10), and the Y-direction moving driving source (64) is a Y-direction driving motor fixed to the X-direction moving frame (63); The X-direction driving motor is connected to the X-direction moving frame (63) via a first synchronous belt transmission assembly (66), the first synchronous belt transmission assembly (66) comprising a first driving pulley (661) and a first driven pulley (662) both rotatably supported in a fixed frame (10), and a first synchronous belt (663) connected to the outer peripheries of the first driving pulley (661) and the first driven pulley (662), the X-direction driving motor is connected to the first driving pulley (661), and the first synchronous belt (663) is fixedly connected to the X-direction moving frame (63); The Y-direction driving motor is connected to the sorting trolley (30) via a second synchronous belt transmission assembly (67), the second synchronous belt transmission assembly (67) comprising a second driving pulley (671) and a second driven pulley (672) both rotatably supported in the X-direction moving frame (63), and a second synchronous belt (673) connected to the outer periphery of the second driving pulley (671) and the second driven pulley (672), the Y-direction driving motor is connected to the second driving pulley (671), and the second synchronous belt (673) is fixedly connected to the sorting trolley (30); The extension path of the first synchronous belt (663) and the extension path of the second synchronous belt (673) both cover the material loading and packaging station (101).

8. The central package supply and sorting system according to claim 7, characterized in that: When the central package supply and sorting system is a four-car structure, two X-direction movable frames (63) are distributed on both sides of the loading and packaging station (101) along the extension direction of the fixed frame (10), and are distributed on one side of the fixed frame (10) along the width direction of the fixed frame (10), and share the same X-direction guide rail (61); the remaining two X-direction movable frames (63) are distributed on both sides of the loading and packaging station (101) along the extension direction of the fixed frame (10), and are distributed on the other side of the fixed frame (10) along the width direction of the fixed frame (10), and share the same X-direction guide rail (61); and two sets of first synchronous belt drive assemblies (66) connected to the two X-direction movable frames (63) sharing the same X-direction guide rail (61) are staggered in the width direction of the fixed frame (10).

9. The central package supply and sorting system according to claim 1, characterized in that: The fixed frame (10) is provided with a corner on its extension path, and the loading and packaging station (101) and the loading and packaging mechanism (20) are both arranged at the corner of the fixed frame (10) along the extension direction of the fixed frame (10).

10. The central package supply and sorting system according to claim 9, characterized in that: The fixed frame (10) is L-shaped; along the feeding direction of the feeding and packaging mechanism (20), the fixed frame (10) is provided with a sorting subsystem on the opposite side of the feeding and packaging mechanism (20); along the direction perpendicular to the feeding direction of the feeding and packaging mechanism (20), the fixed frame (10) is provided with a sorting subsystem on one side of the feeding and packaging mechanism (20); each sorting subsystem comprises a part of the fixed frame (10), a material dropping chute (41) and a material receiving mechanism (50).

11. The central package supply and sorting system according to claim 9, characterized in that: The fixed frame (10) is T-shaped; along the feeding direction of the feeding and packaging mechanism (20), the fixed frame (10) is provided with a sorting subsystem on the opposite side of the feeding and packaging mechanism (20); along the direction perpendicular to the feeding direction of the feeding and packaging mechanism (20), the fixed frame (10) is provided with a sorting subsystem on both sides of the feeding and packaging mechanism (20); each sorting subsystem comprises a part of the fixed frame (10), a material dropping chute (41) and a material receiving mechanism (50).

12. The central package supply and sorting system according to any one of claims 2 or 9 to 11, characterized in that: In each of the sorting subsystems, the fixed frame (10) is provided with a material dropping mechanism (40) on both sides perpendicular to its extension direction, and a trolley movement space (102) for allowing the sorting trolley (30) to move is formed between the two sets of material dropping mechanisms (40); Each set of blanking mechanisms (40) comprises a plurality of chute bottom plates (42) arranged side by side up and down and fixed to a fixed frame (10), a plurality of chute baffles (43) arranged side by side along an extension direction of the fixed frame (10) are fixed to each chute bottom plate (42), and a blanking chute (41) is formed between two adjacent chute baffles (43) and the chute bottom plate (42); A soft cushion (44) extending toward the trolley movement empty area (102) is fixed to the inner edge of each slide groove bottom plate (42) close to the trolley movement empty area (102).

13. The central package supply and sorting system according to claim 12, characterized in that: The soft pad (44) comprises a plurality of silicone strips (441) arranged side by side along the extension direction of the fixed frame (10).

14. The central package supply and sorting system according to claim 1, characterized in that: The feeding and packaging mechanism (20) comprises a fixed feeding and packaging frame (21), and a plurality of feeding belt conveyor mechanisms (22) all mounted on the feeding and packaging frame (21); the plurality of feeding belt conveyor mechanisms (22) are connected in sequence along their conveying direction, and the driving sources of the plurality of feeding belt conveyor mechanisms (22) are independent of each other.

15. The central package supply and sorting system according to claim 14, characterized in that: Along the conveying direction of the feeding belt conveyor mechanism (22), the plurality of groups of feeding belt conveyor mechanisms (22) are distributed in a stepped manner from high to low.

16. The central package supply and sorting system according to claim 14, characterized in that: The feeding and packaging mechanism (20) further comprises a grating sensor (23) arranged on the outer side of each group of feeding belt conveying mechanisms (22) and fixed to the feeding and packaging machine frame (21); the feeding and packaging machine frame (21) is provided with a detection opening (24) allowing the grating sensor (23) to be exposed.

17. The central package supply and sorting system according to claim 1, characterized in that: The sorting trolley (30) comprises a trolley frame (31) movably mounted on a fixed frame (10), and a material transfer belt conveyor mechanism (32) mounted on the trolley frame (31); The material transfer belt conveyor mechanism (32) comprises a material transfer conveyor belt (321), and a plurality of stop bars (322) arranged side by side along the length direction of the material transfer conveyor belt (321) are fixed on the outer surface of the material transfer conveyor belt (321).

18. The central package supply and sorting system according to claim 17, characterized in that: The sorting trolley (30) further comprises a metal sheet fixed to the side of one of the gear bars (322), and a proximity switch fixed to the trolley frame (31), wherein the proximity switch can sense the metal sheet.

19. The central package supply and sorting system according to claim 17, characterized in that: The sorting trolley (30) further comprises a photoelectric sensor and a reflective plate fixed to the trolley frame (31); the photoelectric sensor and the reflective plate are arranged opposite to each other in the up and down directions; the material transfer conveyor belt (321) passes between the photoelectric sensor and the reflective plate and is provided with a light-transmitting hole; the light-transmitting hole can be moved to a position opposite to the reflective plate.

20. A central package sorting method, characterized in that: Using the central package supply and sorting system according to any one of claims 1 to 19, the central package supply and sorting method comprises the following steps: S1, placing a plurality of sorted objects in order on the loading and packaging mechanism (20), and the loading and packaging mechanism (20) transports the sorted objects in a direction toward the fixed frame (10); S2, the sorting trolley (30) moves to the feeding and packaging mechanism (20); S3, the sorting trolley (30) receives the sorted objects output by the feeding and packaging mechanism (20); S4, the sorting trolley (30) moves to the drop chute (41) corresponding to the sorted object on the sorting trolley (30); S5, the sorting trolley (30) unloads the sorted objects thereon, and the sorted objects fall into the receiving frame (51) corresponding to the material dropping chute (41) through the material dropping chute (41); S6, the sorting trolley (30) moves back to the feeding and packaging mechanism (20); S7, repeat steps S3 to S6; In the step S4 that is performed multiple times, the sorting trolley (30) can move toward the material dropping chutes (41) distributed on different sides of the material feeding and packaging mechanism (20).

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