Railway wagon, sorting system and method thereof

Abstract

The application discloses a track sorting trolley, a sorting system and a sorting method thereof, wherein the track sorting trolley comprises a square frame vertically arranged on a moving assembly, the square frame is provided with a first height adjusting mechanism and a second height adjusting mechanism, the first height adjusting mechanism is connected with and drives a first conveying machine to move up and down, the second height adjusting mechanism is connected with and drives a second conveying machine to move up and down, the first conveying machine and the second conveying machine are distributed up and down and located between two support columns of the square frame, and the conveying directions of the first conveying machine and the second conveying machine are consistent. The square frame of the track sorting trolley has two support columns, therefore, the height adjusting mechanisms can be arranged on the two support columns respectively, each height adjusting mechanism can be connected with one conveying machine respectively, the sorting capacity of the single track sorting trolley moving one circle is improved, meanwhile, the two conveying machines can be independently lifted, the flexibility of the height control of the conveying machines is improved, and the sorting range of the single conveying machine is also increased.

Description

Technical Field

[0001] This invention relates to the field of logistics sorting systems, and in particular to rail-mounted sorting carts, sorting systems and sorting methods. Background Technology

[0002] While traditional sorting machines occupy a certain position in logistics sorting, they have shown significant shortcomings when dealing with multiple categories and small batches of packages.

[0003] These types of sorting machines are often limited by their fixed sorting slots and paths, making it impossible to flexibly adjust to the actual situation of the packages. This not only leads to low sorting efficiency but also increases the risk of missorting or missing packages. To increase the number of slots in traditional sorting machines, it is necessary to increase the overall floor space of the loop, which undoubtedly increases the operating costs of the logistics center and may limit its expansion potential.

[0004] Introducing sorting trolleys with lifting capabilities can increase the number of compartments, improve the flexibility and efficiency of the sorting system, and thus enable more precise sorting of packages.

[0005] Patent document CN118239195B discloses a typical sorting trolley with lifting function. In this structure, the belt conveyor of the sorting trolley adopts a cantilever structure, which is mainly used for sorting small-sized and light-weight packages.

[0006] At the same time, each automated sorting vehicle has only one vertical guide support, which means that only one lifting mechanism can be installed on a sorting vehicle, and multiple lifting mechanisms cannot be installed. Therefore, it is impossible for a sorting vehicle to integrate two independently lifting conveyors. Summary of the Invention

[0007] The purpose of this invention is to solve the above-mentioned problems existing in the prior art and to provide a rail-mounted sorting car, a sorting system and a sorting method thereof.

[0008] The objective of this invention is achieved through the following technical solution: The track-mounted freight car includes a frame vertically mounted on a moving component. The frame is equipped with a first height adjustment mechanism and a second height adjustment mechanism. The first height adjustment mechanism is connected to and drives a first transmission machine to move up and down, and the second height adjustment mechanism is connected to and drives a second transmission machine to move up and down. The first and second transmission machines are vertically distributed and located between two pillars of the frame. The first and second transmission machines have the same conveying direction.

[0009] Preferably, the drive motors of the first height adjustment mechanism and the second height adjustment mechanism are located on the first side of the frame, and the first and second transmission mechanisms extend outward to the second side of the frame, with the first and second sides arranged opposite to each other.

[0010] Preferably, a shielding plate is provided at the lower crossbeam of the frame to cover the portion of the movable component located on the second side of the frame.

[0011] Preferably, the first height adjustment mechanism and the second height adjustment mechanism each include a support platform that can move up and down along the support column, and the support platform includes limiting rollers that are rolled on opposite sides of the two support columns.

[0012] Preferably, the first and second transmission machines are connected to the support platform via a shock-absorbing connecting seat.

[0013] Preferably, at least one of the first and second transmission machines is a belt conveyor, and the outer surface of the belt of the belt conveyor is provided with a plurality of annular limiting strips distributed along the width direction of the belt.

[0014] Preferably, the spacing between adjacent annular limiting strips is different.

[0015] The sorting system includes a closed track and a series of sorting carts as described above, the sorting carts moving along the closed track and controlled by a control device.

[0016] The sorting method of the sorting system described above includes the following steps: Obtain the sorting slot to be sorted for a package at a package supply station and match the package with a rail sorting cart, wherein the first and / or second conveyors of the matched rail sorting cart are not bound to the package; The matching track-distribution carts cause the first or second conveyor that needs to receive the package to adjust to the package-receiving height; The package feeding station guides the packages on it to the first or second conveyor at the receiving height; After the rail-mounted freight car passes through the package supply area, it is determined whether there are packages on its first and second conveyors; If it is determined that there is a package on the first or second conveyor of the track sorting cart, the first or second conveyor where the package is located is adjusted to the sorting height according to the height of the sorting slot to which the package is to be sorted. When the track sorting cart moves to the sorting position, the first or second conveyor where the package is located is started to sort the package. If it is determined that both the first and second conveyors of the track sorting car have packages, then the sorting height corresponding to the sorting grid to which the two packages are to be sorted is determined based on the position of the sorting grid to which the two packages are to be sorted. If not, then according to the order in which the two packages need to be sorted, the rail-mounted sorting cart first adjusts the height of the first and / or second conveyors according to the height of the sorting slot to which the package to be sorted first needs to be sorted, and then completes the sorting of the package to be sorted first. Then, according to the height of the sorting slot to which the package to be sorted later needs to be sorted, the height of the first and / or second conveyors is adjusted, and the sorting of the package to be sorted later is completed. If so, the first or second conveyor where the two packages are located is moved to the sorting height according to the height of the sorting slots to which the two packages are to be sorted, and the track sorting cart is controlled to complete the sorting of the two packages according to the order in which the two packages are to be sorted.

[0017] Preferably, when matching a rail-guided sorting cart to a package at a package feeding station, and when it is determined that both the first and second conveyors of the rail-guided sorting cart are idle, the height of the sorting slot to which the package should be sorted is determined. When the sorting slot is located in the upper area, the package is determined to be guided onto the upper one of the first and second conveyors. When the sorting compartment is located in the lower area, the package is determined to be guided onto the lower of the first and second conveyors. When the sorting slot is located in the middle layer area, the package is determined to be guided onto the one of the first and second conveyors that is closer to the receiving height.

[0018] The advantages of the technical solution of this invention are mainly reflected in: The frame of the track sorting cart of the present invention has two pillars. Therefore, a height adjustment mechanism can be set on each of the two pillars. Each height adjustment mechanism can be connected to a conveyor, and the two conveyors are distributed at different heights between the two pillars. This can effectively utilize the space within the frame, improve the sorting capacity of a single track sorting cart moving around once, and at the same time, the two conveyors can be raised and lowered independently, improving the flexibility of the height control of the conveyors and also helping to increase the sorting range of a single conveyor. Attached Figure Description

[0019] Figure 1 This is a rear-view perspective view of the track-distribution freight car of the present invention; Figure 2 This is a cross-sectional view of the track-separated freight car of the present invention; Figure 3 yes Figure 2 A magnified view of a portion of the image; Figure 4 This is a front perspective view of the track-distribution freight car of the present invention; Figure 5 This is a side view of the track-separated freight car of the present invention; Figure 6 This is a top view of the overall layout of the sorting system of the present invention. The dashed arrows in the figure indicate the direction of movement of the track sorting cart along the closed track. Detailed Implementation

[0020] The objectives, advantages, and features of this invention will be illustrated and explained through the following non-limiting description of preferred embodiments. These embodiments are merely typical examples of applying the technical solutions of this invention, and all technical solutions formed by equivalent substitutions or equivalent transformations fall within the scope of protection claimed by this invention.

[0021] In the description of the solution, it should be noted that the terms "center," "upper," "lower," "left," "right," "front," "rear," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience and simplification of description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0022] Example 1 The track-mounted freight car disclosed in this invention will now be described in conjunction with the accompanying drawings, as shown in the attached drawings. Figure 1 -Appendix Figure 5 As shown, it includes a frame 200 vertically arranged on the moving component 100. A first height adjustment mechanism 300 and a second height adjustment mechanism 400 are provided on the frame 200. The first height adjustment mechanism 300 is connected to and drives a first transmission machine 500 to move up and down. The second height adjustment mechanism 400 is connected to and drives a second transmission machine 600 to move up and down. The first transmission machine 500 and the second transmission machine 600 are vertically distributed and located between the two pillars 260 of the frame 200. The conveying directions of the first transmission machine 500 and the second transmission machine 600 are the same.

[0023] The specific structure of the moving component 100 can be configured as needed. In a preferred embodiment, the moving component 100 includes a base frame 110. The specific shape of the base frame 110 can be designed as needed. For example, it includes a first support 111 and a second support 112 arranged in a T-shape. The first support 111 extends along the conveying direction of the first conveyor 500 and the second conveyor 600. The two ends of the base frame 110 are respectively provided with traveling wheels 113. The axis of the traveling wheels 113 extends horizontally. At the same time, the bottom of the base frame 110 is provided with limiting wheels 114 located at both ends. The axis of the limiting wheels 114 extends vertically. A vertical connecting pin 117 is also provided in the middle of the first support 111. The end of the second support 112 away from the first support 111 is provided with an end joint bearing 118 adapted to the vertical connecting pin 117. Thus, the opposite ends of adjacent moving components can be connected by the vertical connecting pin and the end joint bearing 118.

[0024] Meanwhile, a secondary board or secondary component 115 adapted to the primary of the linear motor can be provided at the bottom of the second bracket 112, and a sliding contact line current collector (not shown in the figure) can be provided on the side of the second bracket 112 to supply power to the moving track distribution car.

[0025] The second bracket 112 and the lower crossbeam 210 of the frame 200 are connected and can be fixedly connected. In a more preferred embodiment, they are connected by two micro-motion components 700. Each micro-motion component 700 includes a bearing seat 710 connected to the bottom of the lower crossbeam 210. The bearing seat 710 is embedded in a clearance hole 116 on the second bracket 112, and a spherical bearing 720 is provided on the bearing seat 710 located in the clearance hole 116. A horizontally extending connecting pin passes through the inner ring 721 of the spherical bearing 720 and is fixed to the second bracket 112. The connecting pin 730 is fitted with limiting rings 740 located on both sides of the inner ring 721 of the spherical bearing 720. The two limiting rings 740 limit the inner ring 721 and the hole wall of the clearance hole 116. At the same time, the two connecting pins 730 of the two micro-motion components 700 are perpendicular to each other. Thus, when the track distribution car moves to the turning track, the slight twist of the frame 200 relative to the base frame 110 allows the track distribution car to pass more smoothly and reduces the vibration of the track distribution car when turning.

[0026] Two guide wheels 230 are provided on the upper crossbeam 220 of the frame 200, which are distributed along the extension direction of the upper crossbeam 220. The axis of the guide wheel 230 extends vertically. At the same time, rod end joint bearings 240 are respectively connected to the vertical axis where the two guide wheels 230 are located. The rod end joint bearings 240 on the adjacent sides of the adjacent track distribution cars can be connected by a connecting rod 250. The connecting rod can be a straight rigid rod or a spring rod. The spring rod includes a spring section in the middle and screw sections located at both ends of the spring section. Using a spring rod can give the adjacent track distribution cars a greater degree of relative movement freedom, reduce the interference between the adjacent track distribution cars when turning, and enable the track distribution cars to pass through the turning position more smoothly and with less vibration.

[0027] The first height adjustment mechanism 300 and the second height adjustment mechanism 400 have the same structure. The following description uses the first height adjustment mechanism 300 as an example. It includes a synchronous belt 330 mechanism. The synchronous belt 330 mechanism includes an upper pulley 310 and a lower pulley 320 rotatably mounted on the upper and lower ends of a support column 260 of the frame 200. The axes of the upper pulley 310 and the lower pulley 320 are parallel to the upper crossbeam 220 and the lower crossbeam 210 of the frame 200. The synchronous belt 330 is fitted onto the upper pulley 310 and the lower pulley 320, and the lower pulley 320 is connected to a drive... The drive motor 340, which rotates on its own axis, is located on the first side 270 of the frame 200. The drive motor 340 is a known geared motor, which can be fixed to the side of the lower crossbeam 210 of the frame 200 or to the transmission box 350 on the side of the frame 200. The power output shaft of the drive motor 340 can be connected to the axle of the lower pulley 320 via a transmission mechanism (not shown in the figure) within the transmission box. Thus, the geared motor drives the lower pulley 320 to rotate forward and backward via the transmission mechanism, thereby driving the synchronous belt 330 to rotate forward and backward. The transmission mechanism can be, for example, a gear transmission mechanism or a synchronous belt 330 transmission mechanism, etc., and is not limited here.

[0028] One straight section of the synchronous belt 330 is connected to the support platform 360 via a belt clamp. The support platform 360 is movably connected to the support column 260 along the frame. Thus, when the synchronous belt 330 rotates, the support platform 360 can be moved up and down by the up and down movement of the straight section. The support platform 360 is used to support the first transmission machine 500. It includes a main frame 361 located between the two support columns 260 and a connecting frame 362 slidably connected to the support column 260. Since the main frame 361 is biased to one side of the connecting frame 362 and bears a large load, it is easy for problems such as increased resistance, severe wear, or even jamming to occur between the connecting frame 362 and the support column 260 due to the biased load. Therefore, the connecting frame 362 is also provided with limiting rollers 363 that are rolled and attached to the opposite sides of the two support columns 260. There are two limiting rollers 363, which are set at different heights. The limiting rollers 363 can effectively prevent the bearing platform 360 from tilting downward due to the load of the main frame 361, ensuring the smoothness and stability of the bearing platform 360 moving up and down, and helping to extend its service life.

[0029] The drive motor 340 of the second height adjustment mechanism 400 is also located on the first side 270 of the frame 200, while the first transmission 500 and the second transmission 600 extend outwards to the second side 280 of the frame 200, with the first side 270 and the second side 280 facing each other. This design effectively shifts the center of gravity of the entire track distribution car towards the frame 200, preventing the track distribution car from tilting outwards due to the first transmission 500 and the second transmission 600 extending outwards to the second side 280 of the frame 200, which would otherwise cause the center of gravity of the track distribution car to shift towards the second side 280 of the frame 200.

[0030] Furthermore, in order to reduce the risk of packages falling due to vibration of the first conveyor 500 and the second conveyor 600 during the movement of the rail-mounted freight car, the first conveyor 500 and the second conveyor 600 are connected to the support platform 360 through a shock-absorbing connecting seat 800. The shock-absorbing connecting seat 800 can be a known rubber shock-absorbing seat, which will not be described here.

[0031] The first conveyor 500 and the second conveyor 600 have the same structure. Here, we will use the first conveyor 500 as an example. The first conveyor 500 can be a known roller conveyor or belt conveyor. In a preferred embodiment, the first conveyor 500 is a belt conveyor, which includes a base frame 510 connected to the support platform 360 via the shock-absorbing connecting seat 800. Drive rollers 520 and driven rollers 530 are distributed at both ends of the two side plates 511 of the base frame 510. The drive roller 520 is an electric roller and is closer to the drive motor 340 than the driven roller 530. This effectively matches the positions of the first conveyor 500, the second conveyor 600, and the drive motor 340, causing the center of gravity of the entire track distribution car to be biased towards the frame 200. A belt 540 is fitted onto the drive roller 520 and the electric roller. Simultaneously, the side plates 511 on both sides have side guards 512 extending above the upper surface of the belt.

[0032] To minimize the movement of packages, especially those with uneven bottoms that may roll, due to vibration on the conveyor belt, the outer surface of the belt is provided with multiple annular limiting strips 541 distributed along the width direction of the belt. The number and position of the annular limiting strips 541 can be set as needed. The annular limiting strips 541 can be evenly distributed. In a more preferred embodiment, to better accommodate packages of different sizes, the spacing L between adjacent annular limiting strips 541 is different, and the spacing between adjacent annular limiting strips 541 gradually increases or decreases from one side of the conveyor belt to the other side.

[0033] Meanwhile, to prevent packages from falling from the first end of the first conveyor 500 and the second conveyor 600 near the second side 280 of the frame 200 due to inertia when they are introduced into the first conveyor 500 and the second conveyor 600, a baffle 550 is provided at the first end of the first conveyor 500 and the second conveyor 600 above their conveying surfaces. The baffle 550 is fixed between the two side plates 511 of the base frame 510.

[0034] Finally, a shielding plate 900 is provided at the lower crossbeam 210 of the frame 200 to cover the portion of the moving component 100 located on the second side 280 of the frame 200. The shielding plate 900 can effectively prevent packages and other items from falling below the second conveyor 600 and entering the track to be crushed and affecting the stable operation of the track distribution car, which is beneficial to improving the safety of equipment operation.

[0035] Example 2 This embodiment discloses a sorting system, as shown in the attached figure. Figure 6As shown, it includes a closed track fixed on the main frame A00. The closed track includes an upper track and a lower track. The lower track includes an inner track B10 and an outer track B20 arranged concentrically. The inner track and the outer track include U-shaped travel wheel grooves with opposite openings and a vertical baffle 550 that fits against the guide wheel 230 on one side. The upper track B30 is a U-shaped groove with its opening facing downwards. The guide wheel 230 is rolled in the U-shaped groove. The upper track is located directly above the center position between the inner track and the outer track.

[0036] The sorting system also includes a series of track sorting carts C00 as described above. The series of track sorting carts are connected in sequence to form a closed circular sorting line and can be driven by a linear motor to move along the closed track.

[0037] The outer side of the rail-separated freight car is also equipped with a compartment area DOO and a bag supply area E00.

[0038] The sorting area is typically located in the straight extension of the closed track. Each sorting area is equipped with a sorting component. The sorting component is, for example, the structure disclosed in patent documents such as CN223440456U and CN113145496A. It is not limited here. The sorting component includes multiple layers of sorting compartments, and each layer of sorting compartments includes a row of multiple sorting compartments D10.

[0039] The package supply area E00 is typically located near a bend in the track. This area includes at least two package supply stations E10 distributed along the direction of movement of the track-mounted sorting carts. These stations can be known multi-segment types, with functions such as weighing, shape measurement, barcode scanning, and conveying. Examples include the supply stations disclosed in patent documents with authorization numbers CN223698524U, CN219949655U, and CN214487859U. Their specific structures are not innovative and will not be elaborated upon here. The spacing between adjacent supply stations and their docking points on the circular sorting line ensures that the first and second conveyors of a single track-mounted sorting cart can receive two packages sequentially.

[0040] The track-mounted freight car, the package feeding platform, the linear motor, etc. are all connected to a control device (not shown in the figure). The control device is, for example, a PLC or other feasible control component, which is not limited here.

[0041] Example 3 This embodiment discloses a sorting method for the sorting system described above, including the following steps: The control device acquires the sorting slot of a package at the package supply station and matches the package with a rail-mounted sorting cart. The first conveyor 500 and / or the second conveyor 600 of the matched rail-mounted sorting cart are idle. The control device can acquire the sorting slot of the package when a person scans the QR code or barcode on the package with a barcode reader, or when a barcode reader at the package supply station scans the QR code or barcode on the package. While acquiring the sorting slot of the goods, the control device can also acquire other information about the goods, such as weight information and body shape information.

[0042] After obtaining the sorting slot to which the package needs to be sorted, a rail-guided sorting cart is matched to the package. The specific method for matching one package to one rail-guided sorting cart is known technology and not an innovation of this invention, so it will not be described in detail here. The first conveyor 500 and / or the second conveyor 600 of the rail-guided sorting cart being matched are not bound to the package. The control device binds the package to the rail-guided sorting cart and the first or second conveyor to which it needs to be loaded, that is, it binds and associates the package's weight, size, sorting slot to be sorted, etc., with the number of the rail-guided sorting cart and the number of the first or second conveyor.

[0043] The control device controls the matching track distribution car to adjust the idle first conveyor 500 or second conveyor 600 to the bag receiving height. At the bag receiving height, the conveying surface of the bag supply platform is slightly higher than the annular limiting bar 541 of the first conveyor 500 or second conveyor 600.

[0044] At this time, if the second transmitter 600 or the first transmitter 500 not bound to the package will affect the movement of the first transmitter 500 or the second transmitter 600 bound to the package to the package receiving height, then it is necessary to adjust the second transmitter 600 or the first transmitter 500 not bound to the package simultaneously or first to avoid the movement of the first transmitter 500 or the second transmitter 600 bound to the package.

[0045] For example, if package A1 is matched with sorting cart B1, and neither the first conveyor 500 nor the second conveyor 600 of sorting cart B1 has any packages on them, and it is determined that package A1 needs to be imported onto the first conveyor, then binding package A1 to the first conveyor requires adjusting the first conveyor to the package receiving height. If the height of the second conveyor (not bound to package A1) would obstruct the first conveyor from reaching the receiving height, then the second conveyor can be moved simultaneously with or before moving the first conveyor to avoid obstructing it. Conversely, if the second conveyor does not affect the first conveyor's adjustment to the receiving height, then only the height of the first conveyor needs to be adjusted.

[0046] The control device controls the package feeding station to guide the packages on it to the first conveyor 500 or the second conveyor 600 of the matching track freight car at the package receiving height. The specific method by which the package feeding station guides the packages to the first conveyor 500 or the second conveyor 600 is known technology and is not an innovation of this invention, so it will not be described in detail here.

[0047] After the rail-mounted freight car passes through the package supply area, the control device determines whether there are packages on both the first conveyor 500 and the second conveyor 600 of the rail-mounted freight car.

[0048] If it is determined that there is a package on the first conveyor 500 or the second conveyor 600 of the track sorting cart, the first conveyor 500 or the second conveyor 600 where the package is located is adjusted to the sorting height according to the height of the sorting grid to which the package is to be sorted. When the track sorting cart moves to the sorting position, the first conveyor 500 or the second conveyor 600 where the package is located is started to sort the package.

[0049] For example, after the B1 track sorting car passes through the package supply area, only the first conveyor 500 has package A3 on it. At this time, the control device adjusts the height of the first conveyor 500 according to the height of the sorting slot where package A3 is to be sorted, ensuring that the conveying surface of the first conveyor 500 is not lower than the upper end of the sorting slot where package A3 is to be sorted. If the height of the second conveyor 600 affects the height adjustment of the first conveyor 500, then before or simultaneously with the first conveyor 500 moving downwards to adjust its height, the second conveyor 600 is adjusted to a position lower than the height to which the first conveyor 500 is to be adjusted.

[0050] If it is determined that there are packages on both the first conveyor 500 and the second conveyor 600 of the track sorting car, then it is determined whether the first conveyor and the second conveyor on which the two packages are located can be simultaneously adjusted to the sorting height corresponding to the sorting grid to which the packages are to be sorted, based on the position of the sorting grid to which the two packages are to be sorted. If not, then according to the order in which the two packages need to be sorted, the rail-mounted sorting cart first adjusts the height of the first conveyor 500 and / or the second conveyor 600 according to the height of the sorting slot to which the package to be sorted first needs to be sorted, and then completes the sorting of the package to be sorted first. If so, the first conveyor 500 or the second conveyor 600 containing the two packages will be moved to the sorting height according to the height of the sorting slots to which the two packages are to be sorted, and the track sorting cart will be controlled to complete the sorting of the two packages according to the order in which the two packages are to be sorted.

[0051] For example, after the B1 track sorting car passes through the package supply area, its first conveyor 500 has package A4, and its second conveyor 600 has package A5. The sorting slot C1 for package A4 is located downstream of the sorting slot C2 for package A5, meaning package A4 needs to be sorted later, and package A5 needs to be sorted first. Simultaneously, sorting slot C1 is located on the third layer, and sorting slot C2 is located on the second layer; the third layer is higher than the second layer. In this case, it's determined that the first and second conveyors 500 cannot be adjusted to the sorting height simultaneously based on the height of the two sorting slots. Therefore, the height of the second conveyor 600 is adjusted first to match the height of sorting slot C2 for package A5, which needs to be sorted first. At this point, if the first conveyor 500... The height of 00 affects the height adjustment of the second conveyor 600. Therefore, while or before adjusting the second conveyor 600 upward, the first conveyor 500 is adjusted upward to avoid it. After the first conveyor 500 is adjusted to the sorting height and completes the sorting of A5 packages, the control device adjusts the height of the first conveyor 500 according to the height of the C1 sorting slot where A4 packages are to be sorted. At this time, since the second conveyor 600 is located on the second layer, while or before adjusting the height of the first conveyor 500 upward, the height of the second conveyor 600 needs to be adjusted to a height lower than that to which the first conveyor 500 needs to be adjusted. The first conveyor 500 is then adjusted to the sorting height and completes the sorting.

[0052] In the example above, if sorting slot C1 is located on the third layer and sorting slot C2 is located on the first layer, then it can be determined that the heights of the first conveyor 500 and the second conveyor 600 can be adjusted simultaneously based on the heights of sorting slots C1 and C2.

[0053] After the first or second conveyor of the track sorting car completes the sorting of packages on it, the control device can unbind the package from the first or second conveyor, thereby allowing the control device to determine whether the first or second conveyor of each track sorting car can be matched with a new package.

[0054] Meanwhile, after all packages on the track sorting cart have been sorted, the control device can control the track sorting cart to adjust the first and second conveyors to a height close to the package receiving height for subsequent package receiving. The height close to the package receiving height can be set as needed and is not limited here.

[0055] Furthermore, when matching a rail sorting cart to a package at a package supply station, and when it is determined that the first conveyor 500 and the second conveyor 600 of the rail sorting cart are both idle, the height of the sorting slot to which the package is to be sorted is determined. When the sorting slot is located in the upper area, the package is determined to be guided onto the upper one of the first conveyor 500 and the second conveyor 600. When the sorting compartment is located in the lower area, the package is determined to be guided onto the lower of the first conveyor 500 and the second conveyor 600. When the sorting slot is located in the middle layer area, the package is determined to be guided onto the one of the first conveyor 500 and the second conveyor 600 that is closer to the receiving height.

[0056] The specific boundaries of the upper, middle, and lower layers can be defined according to actual needs. For example, if the sorting area has three layers, and these layers are defined from bottom to top as the first, second, and third layers respectively, then the third layer is defined as the upper layer, the second layer as the middle layer, and the first layer as the lower layer. If the sorting area has four layers, then the fourth layer is defined as the upper layer, the second and third layers as the middle layer, and the first layer as the lower layer. If the sorting area has five layers, then the fourth and fifth layers can be defined as the upper layer, the third layer as the middle layer, and the first and second layers as the lower layer.

[0057] This package feeding method can effectively reduce interference when sorting two packages on a single rail-mounted sorting car. It allows the first and second conveyors 500 and 600 of the rail-mounted sorting car to adjust their heights simultaneously for sorting. This maximizes the ability to sort two packages within one operating cycle when their sorting slots are close together, thereby improving the efficiency of the rail-mounted sorting car.

[0058] Finally, when matching a package to a sorting cart at a parcel supply station, if it is determined that there is already another package on the first or second conveyor of the sorting cart being matched, and it is determined that the other package and the package to be sorted to two sorting slots do not meet the requirement that the first conveyor 500 and the second conveyor 600 can be simultaneously adjusted to the sorting height, then it is determined whether the distance between the two sorting slots meets the requirements for step-by-step sorting. If so, that is, the distance between the two sorting slots meets the requirement that the sorting cart can complete the sorting of the packages that need to be sorted first. If, after sorting, packages requiring subsequent sorting can be adjusted to the corresponding sorting height and sorted, then the matching between the rail-guided sorting cart and the packages at the supply station is confirmed. If not, meaning that after the rail-guided sorting cart completes sorting of the packages requiring initial sorting, before the rail-guided sorting cart moves to the sorting start point upstream of the sorting grid where the packages requiring subsequent sorting are to be sorted, the first conveyor 500 or the second conveyor 600 containing the packages requiring subsequent sorting have not been adjusted to the corresponding sorting height, then the packages at the supply station are re-matched with the rail-guided sorting cart. This ensures that, to the greatest extent possible, both packages on a rail-guided sorting cart can be effectively sorted during one rotation, thereby improving the sorting efficiency of the rail-guided sorting cart.

[0059] This invention has many other embodiments, and all technical solutions formed by equivalent transformation or equivalent transformation fall within the protection scope of this invention.

Claims

1. A track-mounted freight car, comprising a frame vertically mounted on a moving component, characterized in that: The frame is provided with a first height adjustment mechanism and a second height adjustment mechanism. The first height adjustment mechanism is connected to and drives the first transmission machine to move up and down. The second height adjustment mechanism is connected to and drives the second transmission machine to move up and down. The first transmission machine and the second transmission machine are distributed vertically and located between the two pillars of the frame. The first transmission machine and the second transmission machine have the same conveying direction.

2. The track-separated freight car according to claim 1, characterized in that: The drive motors of the first height adjustment mechanism and the second height adjustment mechanism are located on the first side of the frame, and the first and second transmission machines extend outward to the second side of the frame, with the first and second sides arranged opposite to each other.

3. The track-separated freight car according to claim 2, characterized in that: A shielding plate is provided at the lower crossbeam of the frame to cover the portion of the movable component located on the second side of the frame.

4. The track-separated freight car according to claim 1, characterized in that: The first height adjustment mechanism and the second height adjustment mechanism each include a support platform that can move up and down along the support column, and the support platform includes limiting rollers that are rolled on opposite sides of the two support columns.

5. The track-separated freight car according to claim 4, characterized in that: The first and second transmission machines are connected to the support platform via a shock-absorbing connecting seat.

6. The track-separated freight car according to any one of claims 1-5, characterized in that: At least one of the first and second transmission machines is a belt conveyor, and the outer surface of the belt of the belt conveyor is provided with a plurality of annular limiting strips distributed along the width direction of the belt.

7. The track-separated freight car according to claim 6, characterized in that: The spacing between adjacent annular limiting strips is different.

8. A sorting system, including a closed track, characterized in that: It also includes a track distribution car as described in any one of claims 1-7, the track distribution car moving along the closed track and controlled by a control device.

9. The sorting method of the sorting system according to claim 8, characterized in that... It includes the following steps: Obtain the sorting slot to be sorted for a package at a package supply station and match the package with a rail sorting cart, wherein the first and / or second conveyors of the matched rail sorting cart are not bound to the package; The matching track-distribution carts cause the first or second conveyor that needs to receive the package to adjust to the package-receiving height; The package feeding station guides the packages on it to the first or second conveyor at the receiving height; After the rail-mounted freight car passes through the package supply area, it is determined whether there are packages on its first and second conveyors; If it is determined that there is a package on the first or second conveyor of the track sorting cart, the first or second conveyor where the package is located is adjusted to the sorting height according to the height of the sorting slot to which the package is to be sorted. When the track sorting cart moves to the sorting position, the first or second conveyor where the package is located is started to sort the package. If it is determined that both the first and second conveyors of the track sorting car have packages, then the sorting height corresponding to the sorting grid to which the two packages are to be sorted is determined based on the position of the sorting grid to which the two packages are to be sorted. If not, then according to the order in which the two packages need to be sorted, the rail-mounted sorting cart first adjusts the height of the first and / or second conveyors according to the height of the sorting slot to which the package to be sorted first needs to be sorted, and then completes the sorting of the package to be sorted first. Then, according to the height of the sorting slot to which the package to be sorted later needs to be sorted, the height of the first and / or second conveyors is adjusted, and the sorting of the package to be sorted later is completed. If so, the first or second conveyor where the two packages are located is moved to the sorting height according to the height of the sorting slots to which the two packages are to be sorted, and the track sorting cart is controlled to complete the sorting of the two packages according to the order in which the two packages are to be sorted.

10. The sorting method according to claim 9, characterized in that: When matching a package to a rail-guided sorting cart at a package feeding station, and determining that both the first and second conveyors of the rail-guided sorting cart are idle, the height of the sorting slot to which the package should be sorted is determined. When the sorting slot is located in the upper area, the package is determined to be guided onto the upper one of the first and second conveyors. When the sorting compartment is located in the lower area, the package is determined to be guided onto the lower of the first and second conveyors. When the sorting slot is located in the middle layer area, the package is determined to be guided onto the one of the first and second conveyors that is closer to the receiving height.

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