Sorting trolley and sorting system

Abstract

This application provides a sorting cart and sorting system. The sorting cart includes a frame, a power conveying mechanism, spaced first and second baffles, at least one set of wheels, and a controller. The frame includes a bottom support and first and second side plates mounted on the bottom support, with openings at both ends along the length of the side plates. The power conveying mechanism includes a conveyor belt and a power unit. The conveyor belt is positioned between the first and second side plates, and the power unit drives the conveyor belt to reciprocate. The first and second baffles are mounted on the conveyor belt, extending parallel to the width direction of the conveyor belt and higher than its bearing surface. The interval between them is less than or equal to the length of the first and second side plates along the conveyor belt's transmission direction. The wheels are located at the bottom of the bottom support and are positioned perpendicular to the conveyor belt's transmission direction. The power unit is electrically connected to the controller. During material transport, the first and second baffles prevent material from falling.

Description

Technical Field

[0001] This application relates to the field of material sorting technology, and in particular to a sorting cart and sorting system. Background Technology

[0002] Sorting carts are intelligent sorting vehicles that travel along tracks and are used to sort and transfer materials from the material conveyor line to the corresponding slots.

[0003] The transmission direction of the sorting trolley's conveyor belt is perpendicular to the extension direction of the sorting trolley's travel track, and the sorting trolley travels on the track. When it reaches the material conveyor line, the sorting trolley's conveyor belt connects with the material conveyor line and receives the material from the material conveyor line. Then, the sorting trolley carries the material along the track to the corresponding compartment, and the material is delivered to the corresponding compartment via the sorting trolley's conveyor belt, thus completing the material sorting operation.

[0004] However, when the sorting trolley is carrying round or rod-shaped materials, the materials often fall off the trolley or outside the material bin during the sorting process, causing damage to the materials and affecting sorting efficiency. Utility Model Content

[0005] The purpose of this application is to provide a sorting cart and sorting system to solve the problem of round or rod-shaped materials easily falling off. The specific technical solution is as follows:

[0006] This application provides a sorting cart in a first aspect, comprising: a frame including a bottom support and a first side plate and a second side plate disposed on the bottom support, the first side plate and the second side plate being disposed opposite each other in the width direction, such that the frame has openings at both ends in the length direction, the two ends of the frame in the length direction being respectively referred to as the first end and the second end; a power transmission mechanism including a conveyor belt and a power component, the conveyor belt being disposed between the first side plate and the second side plate, the power component being used to drive the conveyor belt to reciprocate; and a first stop bar and a second stop bar disposed at intervals on the conveyor belt and moving together with the conveyor belt. The first and second stop bars extend in directions parallel to the width direction of the conveyor belt. The height of the first and second stop bars is higher than the bearing surface of the conveyor belt. The interval between the first and second stop bars is less than or equal to the length of the first and second side plates along the transmission direction of the conveyor belt. At least one set of traveling wheels is provided at the bottom end of the bottom support for driving the frame to move. A controller is provided, and the power component is electrically connected to the controller. During the material transmission process on the frame, the first and second stop bars are located at the first and second ends, respectively, to block the material and limit the material from falling.

[0007] In some embodiments, the conveyor belt is a ring-shaped transmission structure. When the first end is used for receiving or feeding materials: the conveyor belt drives along a first direction, driving the first stop bar to move below the bearing surface of the sorting trolley, so that the first end forms an opening for receiving or feeding materials; at the same time, the second stop bar is driven to move towards the first end; or, when the second end is used for receiving or feeding materials: the conveyor belt drives along a second direction, driving the second stop bar to move below the bearing surface of the sorting trolley, so that the second end forms an opening for receiving or feeding materials; at the same time, the first stop bar is driven to move towards the second end.

[0008] In some embodiments, the sorting cart further includes: a first grating sensor disposed at a first end of the frame, the first grating sensor being electrically connected to the controller and configured to be triggered when the first stop bar, the second stop bar, or the material is opposite to the first grating sensor; a second grating sensor disposed at a second end of the frame, the second grating sensor being electrically connected to the controller and configured to be triggered when the first stop bar, the second stop bar, or the material is opposite to the second grating sensor; the interval between the first grating sensor and the second grating sensor is equal to the interval between the first stop bar and the second stop bar.

[0009] In some embodiments, the first grating sensor includes a first transmitter and a first receiver, one of the first side plate and the second side plate is provided with the first transmitter and the other is provided with the first receiver, and they are arranged opposite to each other; the second grating sensor includes a second transmitter and a second receiver, one of the first side plate and the second side plate is provided with the second transmitter and the other is provided with the second receiver, and they are arranged opposite to each other.

[0010] In some embodiments, the first grating sensor and the second grating sensor are configured to be triggered by the first stop bar and the second stop bar respectively before receiving material; when the first end is used for receiving material: the controller receives a feeding signal in advance, the conveyor belt drives along the first direction, driving the first stop bar to move below the bearing surface of the sorting trolley, so that the first end forms an opening for receiving material; at the same time, the second stop bar is driven to move to the position of the first grating sensor, triggering the first grating sensor to prepare for receiving material; during the receiving process, the conveyor belt drives along the second direction, driving the second stop bar away from the first grating sensor, and the first grating sensor changes from a triggered state to a non-triggered state; at the same time, the material is driven into the sorting trolley, and the first grating sensor is triggered until the material leaves the first grating sensor, and the first grating sensor changes from a triggered state to a non-triggered state; the conveyor belt continues to drive along the second direction, the first stop bar moves again to the position of the first grating sensor, and the second stop bar moves again to the position of the second grating sensor, so that the first end is ready for receiving material. The first and second grating sensors are triggered again to complete the material receiving process; or, when the second end is used for material receiving: the controller receives a feeding signal in advance, the conveyor belt moves along the second direction, driving the second stop bar to move below the bearing surface of the sorting trolley, so that the second end forms an opening for receiving materials; at the same time, the first stop bar is driven to move to the position of the second grating sensor, triggering the second grating sensor to prepare for material receiving; during the material receiving process, the conveyor belt moves along the first direction, driving the first stop bar away from the second grating sensor, and the second grating sensor changes from a triggered state to a non-triggered state; at the same time, the material is driven into the sorting trolley, and the second grating sensor is triggered until the material leaves the second grating sensor, and the second grating sensor changes from a triggered state to a non-triggered state; the conveyor belt continues to move along the first direction, the first stop bar moves again to the position of the first grating sensor, and the second stop bar moves again to the position of the second grating sensor, so that the first and second grating sensors are triggered again to complete the material receiving process.

[0011] In some embodiments, when the sorting trolley is in a material-carrying state, and the second end is used for material discharge; the conveyor belt drives along the second direction, driving the second stop bar to move below the bearing surface, so that the second end forms an opening for material discharge, and the second grating sensor changes from a triggered state to a non-triggered state; simultaneously, the material is driven to move to the position of the second grating sensor, the second grating sensor is triggered, the material leaves the position of the second grating sensor, the second grating sensor changes back to a non-triggered state, until the second grating sensor is triggered again by the first stop bar, completing the material discharge; the conveyor belt continues to drive along the second direction until the second stop bar triggers the second grating sensor again, and the first stop bar triggers the first grating sensor again. The device returns to its pre-receiving state; or, when the first end is used for discharging: the conveyor belt drives along the first direction, driving the first stop bar to move below the bearing surface, so that the first end forms an opening for discharging material, and the first grating sensor changes from a triggered state to a non-triggered state; at the same time, the material is driven to move to the position of the first grating sensor, the first grating sensor is triggered, the material leaves the position of the first grating sensor, the first grating sensor changes back to a non-triggered state, until the first grating sensor is triggered again by the second stop bar, completing the material discharging; the conveyor belt continues to drive along the first direction until the first stop bar triggers the first grating sensor again, the second stop bar triggers the second grating sensor again, returning to the pre-receiving state.

[0012] In some embodiments, the traveling wheels include two sets, respectively disposed at the first end and the second end of the frame; the rotation axis direction of the traveling wheels is parallel to the length direction of the first side plate and the second side plate.

[0013] In some embodiments, the sorting cart includes an encoder wheel and an encoder connected to the encoder wheel. The encoder is used to record the number of revolutions of the encoder wheel. The encoder is electrically connected to the controller. The encoder wheel is located at the bottom end of the bottom support and is collinear with the walking wheel.

[0014] In some embodiments, the sorting trolley includes at least one set of guide wheels, which are respectively disposed on the bottom support and located outside one set of the traveling wheels. The wheel surface of the guide wheel is perpendicular to the wheel surface of the traveling wheel, so that the guide wheel abuts against the side wall of the traveling track of the sorting trolley when the sorting trolley is moving.

[0015] A second aspect of this application provides a sorting system, the sorting system including the sorting trolley described above and a track for the sorting trolley to run on.

[0016] In some embodiments, the sorting system further includes a material conveyor line, and the sorting trolley is connected to the output end of the material conveyor line for receiving or sending materials. The output end is equipped with a photoelectric sensor, which is electrically connected to the controller. The photoelectric sensor is configured to be triggered when the material blocks it, generating a feeding signal. Upon receiving the feeding signal, the controller controls the operating state of the power unit, causing it to drive the conveyor belt to move along a first direction, driving the first stop bar to move below the bearing surface of the sorting trolley to form an opening and prepare to receive materials from the first end; or, causing it to drive the conveyor belt to move along a second direction, driving the second stop bar to move below the bearing surface of the sorting trolley to form an opening and prepare to receive materials from the second end.

[0017] The sorting cart and sorting system provided in this application embodiment have a power conveying mechanism, which includes a power component and a conveyor belt. The power component drives the conveyor belt to reciprocate. Through the movement of the conveyor belt, materials can be transferred from the material conveyor line to the sorting cart or transferred out of the sorting cart. During material transportation, the first and second stops of the sorting cart can form a space to accommodate materials with the first and second side plates. The first and second stops can block the goods, especially when the materials are irregularly shaped items such as spheres, hemispheres, or rods. The first and second stops have a stopping and limiting effect on the materials, making it less likely for the materials to fall outside the cart or the material box, improving the accuracy and safety of material transfer of the sorting cart, thereby improving sorting efficiency.

[0018] Of course, any product implementing this application does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings.

[0020] Figure 1 A schematic diagram of the structure of the sorting cart provided in this application in one embodiment;

[0021] Figure 2 for Figure 1 A schematic diagram of the structure of the second grating sensor of the sorting trolley being triggered by the first stop bar;

[0022] Figure 3 A schematic diagram showing the structure for the sorting cart to connect with the material conveyor line and for the materials to start being fed out.

[0023] Figure 4 This is a schematic diagram of the structure for transferring materials to a sorting cart;

[0024] Figure 5 A schematic diagram illustrating the structure for the sorting trolley to receive materials.

[0025] Figure 6 A schematic diagram of a sorting cart feeding materials;

[0026] Figure 7 A schematic diagram of the structure for the sorting cart to complete the feeding process.

[0027] The reference numerals in the attached drawings are as follows: frame 10; first end 10a; second end 10b; bottom support 11; first side plate 12; second side plate 13; auxiliary support 14; power conveying mechanism 20; driving roller 21; driven roller 22; conveyor belt 23; first stop bar 231; second stop bar 232; traveling wheel 30; first grating sensor 40; first transmitting end 41; second grating sensor 50; second transmitting end 51; encoder 60; encoder wheel 61; guide wheel 70; material conveying line 80; photoelectric sensor 81; material M; conveying direction A. Detailed Implementation

[0028] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art based on this application are within the scope of protection of this application.

[0029] To address the problem of round or rod-shaped materials easily falling off the sorting cart, this application provides a sorting cart, such as... Figure 1 , Figure 2 As shown, Figure 1 A schematic diagram of the three-dimensional structure of the sorting cart; Figure 2This is a schematic diagram of the structure of the first side plate 12, the first grating sensor 40, the second grating sensor 50, and the power conveying mechanism 20 of the sorting cart. The sorting cart includes a frame 10, a power conveying mechanism 20, spaced-apart first and second stop bars 231 and 232, at least one set of wheels 30, and a controller (not shown). The frame 10 includes a bottom support 11 and a first side plate 12 and a second side plate 13 mounted on the bottom support 11. The first side plate 12 and the second side plate 13 are arranged opposite each other in the width direction, such that the frame 10 has openings at both ends in the length direction. The two ends of the frame 10 in the length direction are respectively designated as the first end 10a and the second end 10b. The power conveying mechanism 20 includes a conveyor belt 23 and a power unit. The conveyor belt 23 is located between the first side plate 12 and the second side plate 13, and the power unit drives the conveyor belt 23 to reciprocate. The first stop bar 231 and the second stop bar 232 are disposed on the conveyor belt 23 and move together with the conveyor belt 23. The extension direction of the first stop bar 231 and the second stop bar 232 is parallel to the width direction of the conveyor belt 23. The height of the first stop bar 231 and the second stop bar 232 is higher than the bearing surface of the conveyor belt 23. The interval between them is less than or equal to the length of the first side plate 12 and the second side plate 13 along the transmission direction A of the conveyor belt 23. The traveling wheel 30 is disposed at the bottom end of the bottom bracket 11 and is used to drive the frame 10 to move. The power unit is electrically connected to the controller. During the material transmission process, the first stop bar 231 and the second stop bar 232 are located at the first end 10a and the second end 10b, respectively, to block the material M and limit the material M from falling.

[0030] In this embodiment, the sorting cart itself has a power conveying mechanism 20, which includes a power component and a conveyor belt 23. The power component drives the conveyor belt 23 to reciprocate. Through the movement of the conveyor belt 23, materials M can be transferred from the material conveying line 80 to the sorting cart or transferred out of the sorting cart. The power component can be a motor and an active roller 21 or a driven roller 22 connected to the motor's output shaft. The motor is electrically connected to a controller, which drives the motor to rotate forward or backward, thereby driving the conveyor belt 23 to convey along a first direction and a second direction. The active roller 21 and the driven roller 22 are located between the first side plate 12 and the second side plate 13, and are respectively located at the first end 10a and the second end 10b of the frame 10. The conveyor belt 23 is sleeved on the active roller 21 and the driven roller 22, and is a closed loop belt. When the conveyor belt 23 reciprocates on the active roller 21 and the driven roller 22, it can drive the first stop bar 231 and the second stop bar 232 to move accordingly. During material transportation, the two baffles, together with the first side plate 12 and the second side plate 13, form a space to accommodate materials. The first baffle 231 and the second baffle 232 can block the goods, especially when the material M is an irregularly shaped part such as a sphere, hemisphere, or rod. The first baffle 231 and the second baffle 232 have a stopping and limiting effect on the material M, making it less likely for the material M to fall outside the vehicle body or the material box, thus improving the accuracy and safety of the sorting trolley's material transfer, thereby improving sorting efficiency. The sorting trolley also includes wheels 30, which allow the sorting trolley to move on the track to complete the sorting work.

[0031] The first stop bar 231 and the second stop bar 232 can be set at the first end 10a and the second end 10b of the frame 10, so that the interval between the first stop bar 231 and the second stop bar 232 can be maximized, so that the sorting trolley can accommodate materials of various sizes.

[0032] In some embodiments of this application, such as Figure 1 , Figure 2 As shown, the conveyor belt 23 has a ring-shaped transmission structure. When the first end 10a is used for receiving or feeding materials: the conveyor belt 23 drives the first stop bar 231 to move below the bearing surface of the sorting cart, so that the first end 10a forms an opening for receiving or feeding materials; at the same time, it drives the second stop bar 232 to move towards the first end 10a. Alternatively, when the second end 10b is used for receiving or feeding materials: the conveyor belt 23 drives the second stop bar 232 to move below the bearing surface of the sorting cart, so that the second end 10b forms an opening for receiving or feeding materials; at the same time, it drives the first stop bar to move towards the second end 10b.

[0033] The first and second directions are related to the rotation direction of the motor. The first direction is defined as the direction corresponding to clockwise rotation of the motor, and the second direction is the direction corresponding to counterclockwise rotation of the motor. When the first end 10a is used to receive material, the first stop bar 231 rotates below the bearing surface of the sorting trolley, forming an opening for receiving material. As the first stop bar 231 moves below the bearing surface, the second stop bar 232 also moves synchronously towards the first end 10a. After the sorting trolley finishes receiving material, the first stop bar 231 can be driven in the opposite direction by the conveyor belt 23 to block the opening of the first end 10a again. Similarly, when the second end 10b is used to receive material, the second stop bar 232 rotates below the bearing surface of the sorting trolley, forming an opening for receiving material. As the second stop bar 232 moves below the bearing surface, the first stop bar 231 also moves synchronously towards the second end 10b. After the sorting trolley finishes receiving material, the second stop bar 232 can be driven in the opposite direction by the conveyor belt 23 to block the opening of the second end 10b again.

[0034] Understandably, the first end 10a can be used for receiving and discharging materials, and the second end 10b can also be used for receiving and discharging materials. Furthermore, during a complete material sorting process, the first end 10a can receive materials from the material conveyor line 80, and when the materials arrive at the target shelf, they can also be discharged from the first end 10a.

[0035] In some embodiments of this application, such as Figure 1 , Figure 2 As shown, the sorting cart also includes a first grating sensor 40 and a second grating sensor 50. The first grating sensor 40 is disposed at the first end 10a of the frame 10 and is electrically connected to the controller. It is configured to be triggered when the first stop bar 231, the second stop bar 232, or the material M is opposite to the first grating sensor 40. The second grating sensor 50 is disposed at the second end 10b of the frame 10 and is electrically connected to the controller. It is configured to be triggered when the first stop bar 231, the second stop bar 232, or the material M is opposite to the second grating sensor 50. The interval between the first grating sensor 40 and the second grating sensor 50 is equal to the interval between the first stop bar 231 and the second stop bar 232.

[0036] In this embodiment, the first grating sensor 40 and the second grating sensor 50 are located at both ends of the frame 10, and the interval between the first grating sensor 40 and the second grating sensor 50 is equal to the interval between the first stop bar 231 and the second stop bar 232. Therefore, during the movement of the conveyor belt 23, the first stop bar 231 and the second stop bar 232 can respectively block the first grating sensor 40 and the second grating sensor 50, or the first stop bar 231 can block the second grating sensor 50, or the second stop bar 232 can block the first grating sensor 40. The controller is electrically connected to the first grating sensor 40 and the second grating sensor 50 respectively. When different grating sensors are triggered, the trigger signal will be transmitted to the controller, and the controller will control the movement of the conveyor belt 23 according to the trigger signal. For example, when the controller detects that the second grating sensor 50 has switched from the state triggered by the first stop bar 231 to the non-triggered state, it will control the conveyor belt 23 to rotate to prepare to receive materials. During the material receiving process, the second grating sensor 50 is triggered again until the second grating sensor 50 switches to the non-triggered state, indicating that all materials have been transferred to the sorting cart. The controller controls the conveyor belt 23 to continue conveying in this direction until the second stop bar 232 triggers the second grating sensor 50 again. At the same time, the first stop bar 231 triggers the first grating sensor 40. Before the materials reach the designated location, the first grating sensor 40 and the second grating sensor 50 always maintain the triggered state. The positions of the first stop bar 231 and the second stop bar 232 remain unchanged, forming a space for accommodating materials together with the first side plate 12 and the second side plate 13. The first stop bar 231 and the second stop bar 232 can shield the materials to prevent them from falling outside the vehicle body or outside the material box.

[0037] By setting two sensors, a first grating sensor 40 and a second grating sensor 50, the current state of the sorting cart can be determined according to the judgment logic, thus achieving automated control. In its initial state, the sorting cart... Figure 3 As shown, the first stop bar 231 triggers the first grating sensor 40, and the second stop bar 232 triggers the second grating sensor 50. When the sorting trolley is ready to receive material M, one of the stops, such as the second stop bar 232, flips downwards, and the other stop bar triggers the grating sensor on the opposite side, such as the first stop bar 231 triggering the second grating sensor 50. Once the controller receives a material transfer signal (e.g., the photoelectric sensor of the material conveyor line 80 changes from triggered to non-triggered), the power unit of the sorting trolley activates, driving the conveyor belt 23 to rotate. The material M is successfully transferred to the sorting trolley using the friction force on the surface of the conveyor belt 23. Figure 4As shown; during this process, the first baffle 231 moves away from the second grating sensor 50, and the material gradually approaches the second grating sensor 50. When the state of the second grating sensor 50 switches from being triggered to not being triggered, then back to being triggered, and then back to not being triggered, it indicates that the material M has been successfully transferred to the sorting cart. The power unit continues to drive the conveyor belt 23 to rotate along the previously transferred direction A until the first baffle 231 triggers the first grating sensor 40 and the second baffle 232 triggers the second grating sensor 50. At this point, the material receiving is completed, and the sorting cart maintains this state to transfer the material, as shown. Figure 5 As shown, after reaching the designated unloading position, taking the unloading end of the second grating sensor 50 as an example, the power unit reverses and drives the conveyor belt 23 to run in the opposite direction. The second stop bar 232 moves away from the second grating sensor 50, and the material gradually approaches the second grating sensor 50. The state of the second grating sensor 50 switches from being triggered to not being triggered, then back to being triggered, and then back to not being triggered. At this time, unloading is completed, and the power unit reverses again. The first stop bar 231 triggers the first grating sensor 40, and the second stop bar 232 triggers the second grating sensor 50. The conveyor belt 23 returns to zero, and the sorting trolley returns to its initial state.

[0038] In some embodiments of this application, such as Figure 1 , Figure 2 As shown, the first grating sensor 40 includes a first transmitter 41 and a first receiver. One of the first side plate 12 and the second side plate 13 is provided with the first transmitter 41, and the other is provided with the first receiver (not shown in the figure), and they are arranged opposite to each other. The second grating sensor 50 includes a second transmitter 51 and a second receiver (not shown in the figure). One of the first side plate 12 and the second side plate 13 is provided with the second transmitter 51, and the other is provided with the second receiver.

[0039] The first transmitting end 41 and the first receiving end are each disposed on one of the side plates. For example, the first transmitting end 41 is disposed on the first side plate 12, and the first receiving end is disposed on the second side plate 13, with the two positioned opposite each other. When the first stop bar 231 or the second stop bar 232 moves between the two, it will block the transmitting end signal, thereby causing the first grating sensor 40 to change from a triggered state to a non-triggered state. Of course, the first transmitting end 41 can also be disposed on the second side plate 13, and the first receiving end can be disposed on the first side plate 12; this application does not impose any restrictions on this. Figure 1 , Figure 2 The schematic diagram only shows the first transmitting end 41 located on the first side plate 12 as an example. The first receiving end is located on the second side plate 13, directly opposite the first transmitting end 41. Figure 1 , Figure 2 Not shown in the image.

[0040] The second transmitting end 51 and the second receiving end are respectively disposed on one of the side plates. For example, the second transmitting end 51 is disposed on the first side plate 12, and the second receiving end is disposed on the second side plate 13, with them facing each other. When the first stop bar 231 or the second stop bar 232 moves between them, it will block the transmitting end signal, thereby causing the second grating sensor 50 to change from a triggered state to a non-triggered state. Of course, the second transmitting end 51 can also be disposed on the second side plate 13, and the second receiving end can be disposed on the first side plate 12; this application does not limit this. Figure 1 , Figure 2 The schematic diagram only shows an example where the second transmitting end 51 is located on the first side plate 12. The second receiving end is located on the second side plate 13, directly opposite the first transmitting end 41. Figure 1 , Figure 2 Not shown in the image.

[0041] In some embodiments of this application, the first grating sensor 40 and the second grating sensor 50 are configured to be triggered by the first baffle 231 and the second baffle 232 respectively before receiving material M.

[0042] When the first end 10a is used for receiving materials:

[0043] The controller receives the feeding signal in advance, and the conveyor belt 23 drives the transmission along the first direction, driving the first stop bar 231 to move below the bearing surface of the sorting trolley, so that the first end 10a forms an opening for receiving materials.

[0044] Simultaneously, the second stop bar 232 is driven to move to the position of the first grating sensor 40, triggering the first grating sensor 40 to prepare for receiving material.

[0045] During the material receiving process, the conveyor belt 23 moves along the second direction, driving the second stop bar 232 away from the first grating sensor 40, and the first grating sensor 40 changes from the triggered state to the non-triggered state.

[0046] Simultaneously, the material M is driven into the sorting cart, and the first grating sensor 40 is triggered until the material M leaves the first grating sensor 40, at which point the first grating sensor 40 changes from the triggered state to the non-triggered state.

[0047] The conveyor belt 23 continues to move along the second direction. The first stop bar 231 moves again to the position of the first grating sensor 40, and the second stop bar 232 moves again to the position of the second grating sensor 50, so that the first grating sensor 40 and the second grating sensor 50 are triggered again to complete the material receiving.

[0048] In this embodiment, the first stop bar 231 rotates below the bearing surface of the sorting cart, and no longer closes the first end 10a of the sorting cart, forming an opening. This allows the material M to be transferred onto the sorting cart by friction when the conveyor belt 23 moves in the reverse direction (i.e., along the second direction). The controller controls the first stop bar 231 and the second stop bar 232 based on the trigger signals from the first grating sensor 40 and the second grating sensor 50. After the material M is transferred to the sorting cart, the first stop bar 231 and the second stop bar 232 are reset. During the movement of the sorting cart, the stops at both ends can block the material M, preventing it from falling.

[0049] Of course, the sorting trolley can also receive materials from the second end 10b. When the second end 10b is used for receiving materials:

[0050] The controller receives the feeding signal in advance, and the conveyor belt 23 drives the second stop bar 232 to move below the bearing surface of the sorting trolley, so that the second end 10b forms an opening for receiving material M.

[0051] Simultaneously, the first stop bar 231 is driven to move to the position of the second grating sensor 50, triggering the second grating sensor 50 to prepare for receiving material;

[0052] During the material receiving process, the conveyor belt 23 moves along the first direction, driving the first stop bar 231 away from the second grating sensor 50, and the second grating sensor 50 changes from the triggered state to the non-triggered state.

[0053] Simultaneously, the material M is driven into the sorting cart, and the second grating sensor 50 is triggered until the material M leaves the second grating sensor 50, at which point the second grating sensor 50 changes from the triggered state to the non-triggered state.

[0054] The conveyor belt 23 continues to move along the first direction. The first stop bar 231 moves again to the position of the first grating sensor 40, and the second stop bar 232 moves again to the position of the second grating sensor 50, so that the first grating sensor 40 and the second grating sensor 50 are triggered again to complete the material receiving.

[0055] In this embodiment, the second stop bar 232 first rotates below the bearing surface of the sorting cart, and the second stop bar 232 no longer closes the second end 10b of the sorting cart, forming an opening. This allows the material M to be transferred onto the sorting cart by friction when the conveyor belt 23 moves in the reverse direction, i.e., along the second direction. The controller controls the first stop bar 231 and the second stop bar 232 based on the trigger signals from the first grating sensor 40 and the second grating sensor 50. After the material M is transferred to the sorting cart, the controller controls the first stop bar 231 and the second stop bar 232 to reset. During the movement of the sorting cart, the stop bars at both ends can block the material M to prevent it from falling.

[0056] After material M is transferred to the sorting cart, the cart remains in a carrying state until it reaches the target shelf. The controller can determine whether the carrying state is normal based on the switching behavior of the grating sensors. Specifically, when the first grating sensor 40 is triggered again by the first stop bar 231, and the second grating sensor 50 is triggered again by the second stop bar 232 (here, "again" refers to the state relative to the initial state), both are in a grating-triggered state, and one of the second grating sensor 50 or the first grating sensor 40 has a switching behavior triggered by material M, while the other is only triggered again by the stop bar but does not switch to an untriggered state. If abnormal triggering or non-triggering of the grating sensors is detected, an abnormal carrying state is indicated.

[0057] When the second end 10b is used for discharge;

[0058] The conveyor belt 23 drives the second stop bar 232 to move below the bearing surface, so that the second end 10b forms an opening for feeding out material M, and the second grating sensor 50 changes from the triggered state to the non-triggered state.

[0059] Simultaneously, the material M is driven to move to the position of the second grating sensor 50. The second grating sensor 50 is triggered, the material M leaves the position of the second grating sensor 50, and the second grating sensor 50 turns into a non-triggered state again until the second grating sensor 50 is triggered again by the first stop bar 231, thus completing the feeding of material M.

[0060] The conveyor belt 23 continues to move along the second direction until the second stop bar 232 triggers the second grating sensor 50 again, and the first stop bar 231 triggers the first grating sensor 40 again, returning to the state before receiving the material.

[0061] In this embodiment, the second stop bar 232 first moves to below the bearing surface of the sorting cart. The second stop bar 232 no longer closes the second end 10b of the sorting cart, forming an opening. This allows the material M to be sent out by friction under the movement of the conveyor belt 23. After the material M is sent out, the conveyor belt 23 continues to move in the first direction, causing the first stop bar 231 and the second stop bar 232 to return to their original positions and return to the state before receiving the material, ready to receive the next material.

[0062] Of course, the sorting trolley can also discharge material from the first end 10a. When discharging material from the first end 10a;

[0063] The conveyor belt 23 drives the first stop bar 231 to move below the bearing surface, so that the first end 10a forms an opening for feeding out material M, and the first grating sensor 40 changes from the triggered state to the non-triggered state.

[0064] Simultaneously, the material M is driven to move to the position of the first grating sensor 40, the first grating sensor 40 is triggered, the material M leaves the position of the first grating sensor 40, the first grating sensor 40 turns to the non-triggered state again until the first grating sensor 40 is triggered again by the second stop bar 232, and the material M is delivered.

[0065] The conveyor belt 23 continues to move along the first direction until the first stop bar 231 triggers the first grating sensor 40 again, and the second stop bar 232 triggers the second grating sensor 50 again, returning to the state before receiving the material.

[0066] In this embodiment, the first baffle 231 is moved to a position below the bearing surface of the sorting trolley. The first baffle 231 no longer closes the first end 10a of the sorting trolley, forming an opening. This allows the material M to be sent out by friction under the movement of the conveyor belt 23. After the material M is sent out, the conveyor belt 23 continues to move in the second direction, causing the first baffle 231 and the second baffle 232 to return to their original positions and return to the state before receiving the material, ready to receive the next material.

[0067] In some embodiments of this application, such as Figure 1 As shown, the axial direction of the walking wheel 30 is parallel to the length direction of the first side plate 12 and the second side plate 13.

[0068] The axial direction of the traveling wheel 30 is parallel to the length direction of the first side plate 12 and the second side plate 13. This makes it convenient for the sorting trolley to move. The two surfaces subjected to inertia are the first side plate 12 and the second side plate 13, respectively. The height of the first side plate 12 and the second side plate 13 is much greater than the height of the first baffle 231 and the second baffle 232, which can better prevent the material M from falling out of the sorting trolley.

[0069] In some embodiments of this application, the walking wheels 30 include two sets, such as... Figure 1 As shown, Figure 1 The two wheels 30 that are marked are a set, and are respectively located at the first end 10a and the second end 10b of the frame 10.

[0070] In this embodiment, the two sets of wheels 30 of the sorting cart are respectively located at the four corners of the bottom support 11, which can evenly distribute the pressure of the sorting cart and ensure that the sorting cart runs smoothly.

[0071] In some embodiments of this application, such as Figure 1 As shown, the sorting trolley includes an encoder wheel 61 and an encoder 60 connected to the encoder wheel 61. The encoder 60 is used to record the number of revolutions of the encoder wheel 61. The encoder 60 is electrically connected to the controller. The encoder wheel 61 is located at the bottom end of the bottom bracket 11 and is collinear with the walking wheel 30.

[0072] In this embodiment, the encoder wheel 61 and the walking wheel 30 are collinear. When the sorting cart moves, the encoder wheel 61 rotates synchronously. One end of the encoder wheel 61 is connected to the encoder 60. The encoder 60 can record the travel of the sorting cart. The structure is simple and easy to implement.

[0073] In some embodiments of this application, such as Figure 1 As shown, when the traveling wheels 30 include two sets, the encoder wheel 61 is located between the two sets of traveling wheels 30. The encoder wheel 61 is located between the two sets of traveling wheels 30, which will not affect the normal setting of the traveling wheels 30 and can ensure the smooth operation of the sorting trolley.

[0074] In some embodiments of this application, such as Figure 1 As shown, the sorting trolley includes at least one set of guide wheels 70. The guide wheels 70 are respectively mounted on the bottom support 11 and located outside one set of walking wheels 30. The wheel surface of the guide wheel 70 is perpendicular to the wheel surface of the walking wheel 30, so that the guide wheel 70 abuts against the side wall of the walking track of the sorting trolley when the sorting trolley is moving.

[0075] In this embodiment, the bottom support 11 also includes an auxiliary support 14. The auxiliary support 14 is located outside the bottom support 11, and both ends of the auxiliary support 14 are recessed inward relative to the bottom support 11 by a certain distance. Guide wheels 70 are disposed on the side wall of one end of the auxiliary support 14, located outside the traveling wheels 30. At least one set of guide wheels 70 is provided. When one set is provided, one set of guide wheels 70 corresponds to one set of traveling wheels 30. The wheel surface of the guide wheel 70 is perpendicular to the traveling wheels 30. When the sorting trolley travels on the track, the guide wheels 70 are located outside the track. By abutting against the side wall of the traveling track, the wheel surface of the guide wheel 70 can limit the movement of the sorting trolley, preventing swaying or shaking during the operation of the track trolley and ensuring the stability of the sorting trolley's movement along the track.

[0076] A second aspect of this application provides a sorting system, which includes the sorting trolley described above and a track (not shown in the figure) for the sorting trolley to run on.

[0077] In this embodiment, the sorting trolley includes a first stop bar 231 and a second stop bar 232, which can prevent the material M from rolling off and falling out of the trolley. The track for the sorting trolley to move can be a track that allows the trolley to move horizontally, a track that allows the trolley to move up and down, or a track that allows both horizontal and vertical movement; this application does not impose any restrictions on this.

[0078] In some embodiments of this application, such as Figure 3 As shown, the sorting system also includes a material conveyor line 80. The sorting trolley is connected to the output end of the material conveyor line 80 to receive or send out materials M. The output end is equipped with a photoelectric sensor 81, and the controller is electrically connected to the photoelectric sensor 81. The photoelectric sensor 81 is configured to be triggered when the material M blocks it, generating a feeding signal. Upon receiving the feeding signal, the controller controls the working state of the power unit, causing it to drive the conveyor belt 23 to move along a first direction, driving the first stop bar 231 to move below the bearing surface of the sorting trolley to form an opening, and preparing to receive material M from the first end 10a; or, causing it to drive the conveyor belt 23 to move along a second direction, driving the second stop bar 232 to move below the bearing surface of the sorting trolley to form an opening, and preparing to receive material M from the second end 10b.

[0079] like Figure 3 , Figure 4 As shown, the sorting trolley is connected to the output end, so that the material M is naturally transferred to the conveyor belt 23 of the sorting trolley under the friction of the material conveyor line 80, preventing damage during the material transfer process. The photoelectric sensor 81 at the output end can be triggered when material M leaves the material conveyor line 80. When the photoelectric sensor 81 changes from the triggered state to the non-triggered state under the action of material M, it means that material M has completely left the material conveyor line 80. The controller receives the trigger signal from the photoelectric sensor 81 and can predict the time when material M will arrive at the conveyor belt 23. Then the controller starts to drive the power component to move, so that material M is conveyed to the sorting cart under the friction of the conveyor surface. At this time, one of the grating sensors of the sorting cart will change from the triggered state to the non-triggered state, ready to receive material M. Then material M triggers the grating sensor again, and then the grating sensor changes to the non-triggered state again. Material M has been completely transferred to the sorting cart. The power component continues to operate as before, so that the grating sensor is triggered again by the corresponding stop bar. The receiving is completed, and the transfer and transportation of material M begins. During the transfer and transportation process, the two grating sensors are triggered by the corresponding stop bars respectively. The receiving space formed by the stop bar and the two side plates can prevent material M from falling during the transfer and transportation process.

[0080] Specifically, the controller receives the feeding instruction from the material conveyor line 80 in advance, and the sorting trolley can receive materials from either the first end 10a or the second end 10b. When the first end 10a is used for receiving materials, the detailed process is as follows:

[0081] The conveyor belt 23 conveys along the first direction, driving the first baffle 231 to move below the bearing surface of the sorting trolley, so that the first end 10a forms an opening for receiving materials.

[0082] At the same time, the second stop bar 232 is driven to move to the blocking position of the first end 10a;

[0083] When material M triggers photoelectric sensor 81:

[0084] The conveyor belt 23 moves along the second direction, driving the second stop bar 232 away from the first grating sensor 40, and the first grating sensor 40 changes from the triggered state to the non-triggered state.

[0085] Simultaneously, the material M is driven into the sorting cart, and the first grating sensor 40 is triggered until the material M leaves the first grating sensor 40, at which point the first grating sensor 40 changes from the triggered state to the non-triggered state.

[0086] The conveyor belt 23 continues to move along the second direction. The first stop bar 231 moves again to the position of the first grating sensor 40, and the second stop bar 232 moves again to the position of the second grating sensor 50, so that the first grating sensor 40 and the second grating sensor 50 are triggered again to complete the material receiving.

[0087] When the second end 10b is used for receiving materials:

[0088] The conveyor belt 23 conveys along the second direction, driving the second stop bar 232 to move below the bearing surface of the sorting trolley, so that the second end 10b forms an opening for receiving materials.

[0089] At the same time, the first stop bar 231 is driven to move to the blocking position of the second end 10b.

[0090] When the material triggers photoelectric sensor 81:

[0091] The conveyor belt 23 moves along the first direction, driving the first stop bar 231 away from the second grating sensor 50, and the second grating sensor 50 changes from the triggered state to the non-triggered state.

[0092] Simultaneously, the material M is driven into the sorting cart, and the second grating sensor 50 is triggered until the material M leaves the second grating sensor 50, at which point the second grating sensor 50 changes from the triggered state to the non-triggered state.

[0093] The conveyor belt 23 continues to move along the first direction, the second stop bar 232 moves again to the position of the second grating sensor 50, and the first stop bar 231 moves again to the position of the first grating sensor 40, so that the second grating sensor 50 and the first grating sensor 40 are triggered again to complete the material receiving.

[0094] Understandably, the controller of the sorting cart will receive the receiving signal sent by the material conveyor line 80 in advance before the photoelectric sensor 81 is triggered. At this time, under the control of the controller, the conveyor belt starts to drive, causing the stop bar to leave the blocking position, so that the first end 10a or the second end 10b of the sorting cart forms an opening to prepare for receiving the material. When the photoelectric sensor 81 of the material conveyor line 80 is triggered, the controller controls the conveyor belt 23 to drive in reverse to receive the material M.

[0095] The sorting cart may also include an alarm system. An alarm can be triggered when an abnormal trigger signal is detected or when an abnormal failure to trigger is detected. The following section details the complete material receiving and feeding process of the sorting cart.

[0096] Taking the receiving position on the second grating sensor 50 as an example, the sorting trolley receives the material feeding instruction from the material conveyor line 80 in advance. Before entering the receiving position, it rolls the conveyor belt in advance, causing the first stop bar 231 to move to the second grating sensor 50 and trigger it. The second stop bar 232 flips to the bottom, and the controller controls the power component to rotate, causing the conveyor belt 23 to decelerate after reaching the designated stroke until the second grating sensor 50 is triggered. This ensures that after stopping, the first stop bar 231 stops at the second grating sensor 50, and the second grating sensor 50 is in the triggered state. Figure 2 As shown.

[0097] Next, as Figure 3 As shown, when the material conveyor line 80 completes its connection with the sorting trolley, the material conveyor line 80 starts to rotate. When the material (i.e., material M) triggers the photoelectric sensor 81 at the output end of the material conveyor line 80, the sorting trolley conveyor belt 23 starts to rotate at the same speed. At this time, the photoelectric sensor 81 of the material conveyor line 80 is triggered until the photoelectric sensor 81 returns to a non-triggered state, which indicates that all the material has been delivered and the material on the belt of the material conveyor line 80 is cleared. Immediately afterwards, the sorting trolley conveyor belt 23 rotates synchronously when the material is triggered, and the material, i.e., material M, begins to transition onto the sorting trolley conveyor belt 23.

[0098] Furthermore, such as Figure 4As shown, the second grating sensor 50 on the material-triggered sorting trolley is activated. When the sorting trolley receives the feeding signal, the material has begun to enter the trolley. After the photoelectric sensor 81 of the material conveyor line 80 switches from the triggered state to the non-triggered state, the time for the second grating sensor 50 to switch from the triggered state to the non-triggered state can be calculated by combining the roller speed of the power conveying mechanism 20. The error is given according to the corresponding speed. If the second grating sensor 50 has not switched to the non-triggered signal after the sorting trolley trigger signal switches, an alarm should be issued. Check whether the material M has entered the sorting trolley correctly. If it is triggered normally, it means that the material M has entered the trolley normally. After the material M has completely entered the trolley, the second grating sensor 50 switches to the non-triggered state. It is in the non-triggered state until the second stop bar 232 reaches the second grating sensor 50. If a signal switch occurs during this period, it is determined whether the second stop bar 232 is triggered by the power component stroke. If the stroke is less than the arrival stroke of the second stop bar 232, an alarm should be issued and a check should be reminded.

[0099] Furthermore, such as Figure 5 As shown, when the second stop bar normally triggers the second grating sensor 50, and the first grating sensor 40 is simultaneously triggered by the first stop bar 231, this state is the normal material receiving state, which is different from the zeroing state. The zeroing state means that the first stop bar 231 blocks the first grating sensor 40, and the second stop bar 232 blocks the second grating sensor 50. Because at this time, the second grating sensor 50 has a jump triggered by feeding material M, and the second stop bar 232 triggers the second grating sensor 50 but does not jump to non-triggered, that is, the two grating sensors only receive one complete grating trigger to non-triggered process, the controller considers the sorting cart to be in the material-carrying state, that is, the process of material M being transferred, and feeds the material to the corresponding shelf feeding port position according to the relevant position given by the sorting system main controller.

[0100] Then, the sorting trolley reaches the corresponding feeding port position. According to the feeding port direction, the power unit controls the conveyor belt 23 to move in the corresponding direction. Now, taking the outlet as the side of the first grating sensor 40 as an example, ... Figure 6As shown, when the sorting trolley delivers material M, the first grating sensor 40 changes twice. Under the action of the conveyor belt 23, the first stop bar 231 moves away from the blocking position of the first grating sensor 40, and the first grating sensor 40 jumps from the triggered state to the non-triggered state. At this moment, the next jump of the first grating sensor 40 is the signal that material M has left the sorting trolley. When the conveyor belt 23 rolls to the point where material M blocks the first grating sensor 40, the first grating sensor 40 jumps from the untriggered state to the triggered state. This continues until material M leaves the trolley, at which point the first grating sensor 40 jumps from the triggered state to the non-triggered state. At this point, the material conveying is complete, and material M has been transferred to the designated location. To ensure that the material has completely left the sorting trolley, the roller continues to roll until the second stop bar 232 triggers the first grating sensor 40 again, and the first grating sensor 40 jumps from the non-triggered state to the triggered state again. At this moment, it is confirmed that the material has completely left the trolley. Figure 7 As shown. Then, the roller continues to roll in the same direction until the two grating sensors are triggered simultaneously again, that is, the first grating sensor 40 is triggered by the first stop bar 231 and the second grating sensor 50 is triggered by the second stop bar 232. This is recorded as the sorting trolley entering the zeroing state. If the signal of the first grating sensor 40 continues to be triggered after the second stop bar 232 reaches the corresponding stroke and triggers the first grating sensor 40 and leaves, a warning will be issued to indicate that the feeding is abnormal.

[0101] The above description is merely a preferred embodiment of this application and is not intended to limit the scope of protection of this application. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application are included within the scope of protection of this application.

Claims

1. A sortation cart, comprising: include: The frame includes a bottom support and a first side plate and a second side plate disposed on the bottom support. The first side plate and the second side plate are disposed opposite each other in the width direction, such that the two ends of the frame in the length direction are open. The two ends of the frame in the length direction are respectively referred to as the first end and the second end. A power transmission mechanism includes a conveyor belt and a power component. The conveyor belt is disposed between the first side plate and the second side plate, and the power component is used to drive the conveyor belt to reciprocate. A first and second stop bar, spaced apart, are disposed on the conveyor belt and move together with the conveyor belt. The extension direction of the first and second stop bars is parallel to the width direction of the conveyor belt. The height of the first and second stop bars is higher than the bearing surface of the conveyor belt. The interval between the first and second stop bars is less than or equal to the length of the first and second side plates along the transmission direction of the conveyor belt. At least one set of wheels is provided at the bottom end of the bottom support for moving the vehicle frame; The controller, wherein the power component is electrically connected to the controller; During the material transport process on the vehicle frame, the first stop bar and the second stop bar are located at the first end and the second end, respectively, to block the material and limit its fall.

2. The sort car of claim 1, wherein, The conveyor belt has a ring-shaped transmission structure, and the first end is used for receiving or feeding materials: The conveyor belt drives the first stop bar along the first direction to move below the bearing surface of the sorting trolley, so that the first end forms an opening for receiving or sending out materials; Simultaneously, the second stop bar is driven to move closer to the first end; Alternatively, when the second end is used for receiving or feeding materials: The conveyor belt moves along the second direction, driving the second stop bar to move below the bearing surface of the sorting trolley, so that the second end forms an opening for receiving or sending out materials; Simultaneously, the first stop bar is driven to move closer to the second end.

3. The sort car of claim 2, wherein, The sorting cart also includes: A first grating sensor is disposed at a first end of the vehicle frame. The first grating sensor is electrically connected to the controller and is configured to be triggered when the first stop bar, the second stop bar, or the material is opposite to the first grating sensor. A second grating sensor is disposed at the second end of the vehicle frame. The second grating sensor is electrically connected to the controller and is configured to be triggered when the first stop bar, the second stop bar, or the material is opposite to the second grating sensor. The interval between the first grating sensor and the second grating sensor is equal to the interval between the first stop bar and the second stop bar.

4. The sort car of claim 3, wherein, The first grating sensor includes a first transmitting end and a first receiving end. One of the first side plate and the second side plate is provided with the first transmitting end, and the other is provided with the first receiving end, and they are arranged opposite to each other. The second grating sensor includes a second transmitter and a second receiver. The second transmitter is provided on one of the first side plate and the second side plate, and the second receiver is provided on the other side plate, and they are arranged opposite to each other.

5. The sort car of claim 4, wherein, The first grating sensor and the second grating sensor are configured to be triggered by the first baffle and the second baffle, respectively, before receiving material; When the first end is used for receiving materials: The controller receives the feeding signal in advance, and the conveyor belt drives the first stop bar to move below the bearing surface of the sorting trolley, so that the first end forms an opening for receiving materials; Simultaneously, the second baffle is driven to move to the position of the first grating sensor, triggering the first grating sensor to prepare for receiving material; During the receiving process, the conveyor belt moves along the second direction, driving the second stop bar away from the first grating sensor, and the first grating sensor changes from a triggered state to a non-triggered state; Simultaneously, the material is driven into the sorting cart, and the first grating sensor is triggered until the material leaves the first grating sensor, at which point the first grating sensor changes from the triggered state to the non-triggered state. The conveyor belt continues to move along the second direction, the first stop bar moves again to the position of the first grating sensor, and the second stop bar moves again to the position of the second grating sensor, so that the first grating sensor and the second grating sensor are triggered again to complete the material receiving; Alternatively, when the second end is used for receiving materials: The controller receives the feeding signal in advance, and the conveyor belt drives the second stop bar to move below the bearing surface of the sorting trolley, so that the second end forms an opening for receiving materials; Simultaneously, the first baffle is driven to move to the position of the second grating sensor, triggering the second grating sensor to prepare for receiving material; During the receiving process, the conveyor belt moves along the first direction, driving the first stop bar away from the second grating sensor, and the second grating sensor changes from a triggered state to a non-triggered state; Simultaneously, the material is driven into the sorting cart, and the second grating sensor is triggered until the material leaves the second grating sensor, at which point the second grating sensor changes from the triggered state to the non-triggered state. The conveyor belt continues to move along the first direction, the first stop bar moves again to the position of the first grating sensor, and the second stop bar moves again to the position of the second grating sensor, so that the first grating sensor and the second grating sensor are triggered again to complete the material receiving.

6. The sorting cart according to claim 5, characterized in that, When the sorting trolley is in a material-carrying state, the second end is used for discharging material; The conveyor belt moves along the second direction, driving the second stop bar to move below the bearing surface, so that the second end forms an opening for feeding out materials, and the second grating sensor changes from a triggered state to a non-triggered state. Simultaneously, the material is driven to move to the position of the second grating sensor, the second grating sensor is triggered, the material leaves the position of the second grating sensor, the second grating sensor turns to a non-triggered state again, until the second grating sensor is triggered again by the first baffle, and the material is delivered. The conveyor belt continues to move along the second direction until the second stop bar triggers the second grating sensor again, and the first stop bar triggers the first grating sensor again, returning to the state before receiving the material; Alternatively, the first end may be used for discharging material; The conveyor belt moves along the first direction, driving the first stop bar to move below the bearing surface, so that the first end forms an opening for feeding out materials, and the first grating sensor changes from a triggered state to a non-triggered state. Simultaneously, the material is driven to move to the position of the first grating sensor, the first grating sensor is triggered, the material leaves the position of the first grating sensor, the first grating sensor turns to a non-triggered state again, until the first grating sensor is triggered again by the second baffle, and the material is delivered. The conveyor belt continues to move along the first direction until the first stop bar triggers the first grating sensor again, and the second stop bar triggers the second grating sensor again, returning to the state before receiving the material.

7. The sort cart of any of claims 1-6, wherein, The walking wheels include two sets, which are respectively disposed at the first end and the second end of the vehicle frame; The rotation axis of the walking wheel is parallel to the length direction of the first side plate and the second side plate.

8. The sort car of any of claims 1-6, wherein, The sorting trolley includes an encoder wheel and an encoder connected to the encoder wheel. The encoder is used to record the number of revolutions of the encoder wheel. The encoder is electrically connected to the controller. The encoder wheel is located at the bottom end of the bottom support and is collinear with the walking wheel.

9. The sort car of claim 8, wherein, The sorting trolley includes at least one set of guide wheels, which are respectively disposed on the bottom support and located outside one set of the traveling wheels. The wheel surface of the guide wheel is perpendicular to the wheel surface of the traveling wheel, so that the guide wheel abuts against the side wall of the traveling track of the sorting trolley when the sorting trolley moves.

10. A sorting system characterized in that, The sorting system includes a sorting trolley as described in any one of claims 1-9 and a track for the sorting trolley to run on.

11. The sorting system of claim 10, wherein, The sorting system also includes a material conveyor line, and the sorting trolley is connected to the output end of the material conveyor line to receive or send out materials. The output terminal is equipped with a photoelectric sensor, which is electrically connected to the controller. The photoelectric sensor is configured to be triggered when the material blocks it, thereby generating a feeding signal. Upon receiving the feeding signal, the controller controls the operating state of the power unit, causing it to drive the conveyor belt along a first direction, moving the first stop bar to below the bearing surface of the sorting trolley to form an opening and prepare to receive material from the first end; or, causing it to drive the conveyor belt along a second direction, moving the second stop bar to below the bearing surface of the sorting trolley to form an opening and prepare to receive material from the second end.

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