Material table car transport device and material transport system

Abstract

The application discloses a material trolley conveying device and a material conveying system, the material trolley conveying device comprising a line body, a material trolley, a first trolley mechanism, a conveying vehicle and a lifting mechanism, the line body being provided with a connecting station and a feeding port, the connecting station being arranged close to the feeding port; the material trolley comprising a material trolley body and a connecting assembly, the connecting assembly comprising a connecting piece; the first trolley mechanism being arranged corresponding to the feeding port; the conveying vehicle comprising a conveying vehicle body and a driving assembly, the driving assembly being used to drive the conveying vehicle body to move on the line body; the lifting mechanism being arranged at the connecting station. The material trolley is moved to the line body through the first trolley mechanism, and then the connecting piece is lowered through the lifting mechanism, so that the connecting piece is connected with the conveying vehicle body; therefore, the material trolley conveying device is used to convey the material trolley, the automation degree of conveying the material trolley is improved, the manpower is saved, the labor intensity of operators is reduced, and the production cost is also reduced.

Description

Technical Field

[0001] This invention relates to the field of material transportation technology, and in particular to a material trolley conveying device and a material transportation system. Background Technology

[0002] Materials are typically loaded onto material trolleys. The material trolleys move from their loading position to the processing line mainly using AGVs. As the material trolleys move along the processing line, other equipment on the line processes the materials on them. After processing, the material trolleys are transported again by AGVs to a designated location for unloading.

[0003] Currently, the material trolley needs to be manually pushed by on-site operators to move from the AGV onto the production line. Once on the line, the material trolley also needs to be manually connected to the transport mechanism so that the transport mechanism can drive the material trolley to move on the line. This makes the material trolley transportation not only less automated, but also requires a lot of manpower, is labor-intensive, and has high production costs.

[0004] Therefore, it is necessary to provide a new material trolley conveying device and material transport system to solve or at least alleviate the above-mentioned technical defects. Summary of the Invention

[0005] The main objective of this invention is to provide a material trolley conveying device and a material transport system, which aims to solve the technical problems of existing material conveying trolleys having low automation, high manpower consumption, high labor intensity, and high production costs.

[0006] To achieve the above objectives, the present invention provides a material trolley conveying device, the material trolley conveying device comprising:

[0007] The production line is provided with a connecting station and a feeding port, with the connecting station located near the feeding port.

[0008] A material trolley, the material trolley including a material trolley body and a connecting assembly, the connecting assembly including a connector;

[0009] A first trolley mechanism is provided corresponding to the feed inlet to move the material trolley body located at the feed inlet to the connecting station.

[0010] The transport vehicle includes a transport vehicle body and a drive assembly that are connected by a transmission, the drive assembly being used to drive the transport vehicle body to move on the line;

[0011] A lifting mechanism is provided at the connection station. The lifting mechanism is used to drive the connector located at the connection station to descend, so that the connector located at the connection station is connected to the transport vehicle body.

[0012] In one embodiment, the lifting mechanism includes a lifting drive assembly, a guide block, and a lifting rail. The lifting rail is slidably connected to the line body, the guide block is connected to the lifting rail, and the lifting drive assembly is drively connected to the guide block to drive the lifting rail to move up and down via the guide block.

[0013] In one embodiment, the material trolley conveying device further includes a first guide rail, which guides the connector moving from the feed inlet to the connecting station to rise to a position where the bottom surface of the connector is spaced apart from the top surface of the transport vehicle body. The first guide rail is connected to the line and is located on the side of the lifting track facing the feed inlet. The lifting track includes a lifting position and a lowering position. The lifting drive assembly can drive the lifting track to reciprocate between the lifting position and the lowering position via the guide block. When the lifting track is in the lifting position, it is connected to the first guide rail. When the lifting track is in the lowering position, the connector is connected to the transport vehicle body.

[0014] In one embodiment, the first trolley mechanism includes a trolley drive assembly, a bracket, a first swing arm, and a first reset assembly. The bracket includes a frame body and a first limiting block connected to each other. The first swing arm includes a trolley portion, a first connecting portion, and a first movable portion connected in sequence. The trolley portion is used to abut against a material trolley. The trolley portion includes a first sidewall and a second sidewall disposed opposite to each other. The first connecting portion is hinged to the frame body and can rotate relative to the frame body, so that the first sidewall can abut against the material trolley traveling in the travel direction, and the material trolley can push the first sidewall to rotate in a first direction. The first reset component is installed on the frame body and connected to the first movable part. When the material trolley moves along the travel direction to the point where it separates from the first side wall and the pusher part, the first reset component can drive the pusher part to move and reset along a second direction opposite to the first direction. The first limiting block is used to abut against the first movable part to restrict the movement of the first movable part along the second direction. The drive component is used to drive the second side wall of the first swing arm to abut against the material trolley through the frame body to drive the material trolley to move along the travel direction.

[0015] In one embodiment, the first reset assembly includes a first elastic element and a first guide rod. The bracket further includes a first mounting platform. The first mounting platform has a first through hole through which the first guide rod passes. The first guide rod includes a first connecting end and a first mounting end disposed opposite to each other. The first connecting end is hinged to the first movable part. One end of the first elastic element is connected to the first mounting end, and the other end of the first elastic element is connected to the first mounting platform.

[0016] In one embodiment, the transport vehicle body includes a vehicle body, a connecting frame, and wheels. The connecting frame is connected to the vehicle body, and the wheels are rotatably mounted on the connecting frame. The line is provided with a travel track, and the wheels roll in cooperation with the track. The drive assembly is used to drive the vehicle body to move.

[0017] In one embodiment, the material trolley conveying device further includes a clamping mechanism, which includes a material trolley clamping assembly. The material trolley clamping assembly includes a fixed frame, a clamping drive, a first clamping arm, a second clamping arm, and a transmission arm. The output shaft of the clamping drive is hinged to the first clamping arm. Both the first and second clamping arms are hinged to the fixed frame. One end of the transmission arm is hinged to the first clamping arm, and the other end of the transmission arm is hinged to the second clamping arm, so that the drive can drive the first and second clamping arms to clamp or release the material trolley body.

[0018] In addition, the present invention also provides a material transport system, the material transport system including a material trolley carrying device and the above-mentioned material trolley conveying device, the material trolley conveying device further including a second trolley mechanism, the line body is also provided with a discharge port, and the second trolley mechanism is used to move the material trolley located on the line body to the material trolley carrying device located at the discharge port.

[0019] In one embodiment, the material transport system further includes a second guide rail, which is disposed near the discharge port, so that as the material trolley body passes through the second guide rail, the connecting member can be separated from the transport vehicle body under the guidance of the second guide rail.

[0020] In one embodiment, the material trolley transport device includes an AGV and an AGV trolley located on the AGV. The AGV trolley includes an AGV trolley body and a limiting assembly. The limiting assembly includes a mounting frame, a limiting member, a transmission member, a swing member, and a torsion spring. The limiting member is slidably engaged with the mounting frame. The mounting frame is connected to the AGV trolley body. The swing member includes a connecting end, a mounting part, and a swing end connected in sequence. One end of the transmission member is hinged to the connecting end, and the other end of the transmission member is hinged to the limiting block. The limiting block is slidably engaged with the mounting frame. The mounting part is hinged to the mounting frame. One end of the torsion spring is connected to the mounting part, and the other end of the torsion spring is connected to the mounting frame.

[0021] In one embodiment, the AGV includes a carrier body and at least two positioning components. Each positioning component includes a positioning drive and a positioning element. The positioning drive is installed on the carrier body. The AGV trolley body has at least two positioning holes. Each positioning hole has a corresponding positioning element. The positioning drive is used to drive the positioning element to move up and down so that the positioning element enters or leaves the positioning hole.

[0022] In the above-mentioned technical solution of the present invention, the AGV trolley drives the material trolley located on it to the feed inlet of the line. The first pushing mechanism moves the material trolley located at the feed inlet to the connecting station on the line. Then, the lifting mechanism drives the connector located at the connecting station to descend so that the connector is connected to the transport vehicle body. This allows the drive component to drive the transport vehicle body to move on the line, thereby driving the material trolley to move on the line. The entire process completes the two steps of automatically moving the material trolley from the AGV trolley to the line and connecting the material trolley to the transport vehicle body of the line without human intervention. Therefore, the use of a material trolley transport device to transport the material trolley improves the automation level of transporting the material trolley. The entire process does not require human intervention, saving manpower, reducing the labor intensity of operators, and also reducing production costs. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of the present invention 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 the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0024] Figure 1 This is a partial structural schematic diagram of a material transport system according to an embodiment of the present invention;

[0025] Figure 2This is a top view of a material trolley conveying device according to an embodiment of the present invention;

[0026] Figure 3 This is a bottom view of a material trolley conveying device according to an embodiment of the present invention;

[0027] Figure 4 for Figure 3 A magnified view of a portion at point A;

[0028] Figure 5 This is a partial structural schematic diagram of a material trolley conveying device according to an embodiment of the present invention;

[0029] Figure 6 This is a schematic diagram of the structure of an AGV trolley according to an embodiment of the present invention;

[0030] Figure 7 This is a schematic diagram of the structure of a limiting component according to an embodiment of the present invention;

[0031] Figure 8 This is a schematic diagram of the structure of a transport vehicle according to an embodiment of the present invention;

[0032] Figure 9 This is a schematic diagram of the structure of an AGV according to an embodiment of the present invention;

[0033] Figure 10 This is a schematic diagram of the structure of a material trolley according to an embodiment of the present invention;

[0034] Figure 11 This is a partial structural schematic diagram of the first trolley mechanism according to an embodiment of the present invention;

[0035] Figure 12 This is a top view schematic diagram of the first trolley mechanism according to an embodiment of the present invention;

[0036] Figure 13 This is a left-side schematic diagram of the first trolley mechanism according to an embodiment of the present invention;

[0037] Figure 14 This is a top view schematic diagram of the first trolley mechanism according to an embodiment of the present invention.

[0038] Explanation of icon numbers:

[0039]

[0040]

[0041] The realization of the objective, functional characteristics and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0042] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0043] It should be noted that all directional indications (such as forward, backward, left, and right) in the embodiments of this invention are only used to interpret a specific posture (as shown in the attached diagram). Figure 2 The relative positions and movements of the components shown below are considered. If the specific posture changes, the directional indication will also change accordingly.

[0044] Furthermore, in this invention, descriptions involving "first," "second," etc., are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" can explicitly or implicitly include at least one of that feature.

[0045] Furthermore, the technical solutions of the various embodiments of the present invention can be combined with each other, but only if they are implemented by those skilled in the art. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by the present invention.

[0046] This invention provides a material trolley conveying device 1, in one embodiment, as follows: Figures 1-10 As shown, the material trolley conveying device 1 includes a production line 11, a material trolley 12, a first pushing mechanism 13, a transport vehicle 14, and a lifting mechanism 15. The production line 11 is provided with a connecting station 111 and a feed inlet 112, with the connecting station 111 located near the feed inlet 112. The material trolley 12 includes a material trolley body 121 and a connecting assembly 122, with the connecting assembly 122 including a connector 1221. The first pushing mechanism 13 is located corresponding to the feed inlet 112 and is used to transport materials located at the feed inlet 14. The material trolley body 121 at position 112 moves to the connection station 111; the transport vehicle 14 includes a transport vehicle body 141 and a drive assembly 142 connected by a transmission. The drive assembly 142 is used to drive the transport vehicle body 141 to move on the line body 11; the lifting mechanism 15 is provided at the connection station 111. The lifting mechanism 15 is used to drive the connector 1221 located at the connection station 111 to descend, so that the connector 1221 located at the connection station 111 is connected to the transport vehicle body 141.

[0047] In this process, the AGV trolley 212 moves the material trolley 12 located on it to the feed inlet 112 of the line 11. The first pushing mechanism 13 moves the material trolley 12 located at the feed inlet 112 to the connection station 111 on the line 11. Then, the lifting mechanism 15 lowers the connector 1221 located at the connection station 111 so that the connector 1221 is connected to the transport vehicle body 141. This allows the drive component 142 to move on the line 11 by driving the transport vehicle body 141, thereby moving the material trolley 12 on the line 11. The entire process completes the two steps of automatically moving the material trolley 12 from the AGV trolley 212 to the line 11 and connecting the material trolley 12 to the transport vehicle body 141 of the line 11 without human intervention. Therefore, the use of the material trolley transport device 1 to transport the material trolley 12 improves the automation level of transporting the material trolley 12. The entire process does not require human intervention, saving manpower, reducing the labor intensity of operators, and also reducing production costs.

[0048] like Figure 2 and Figure 5 As shown, in one embodiment, the lifting mechanism 15 includes a lifting drive assembly 151, a guide block 152, and a lifting rail 153. The lifting rail 153 is slidably connected to the line body 11, the guide block 152 is connected to the lifting rail 153, and the lifting drive assembly 151 is drively connected to the guide block 152 to drive the lifting rail 153 to rise and fall through the guide block 152. The lifting track 153 is slidably connected to the line body 11, allowing the lifting track 153 to slide up and down relative to the line body 11. The lifting drive assembly 151 drives the guide block 152 to slide in the front-back direction, so that the forward and backward movement of the guide block 152 can drive the lifting track 153 to descend or ascend. That is, when the lifting drive assembly 151 drives the guide block 152 to move backward, the lifting track 153 will move upward under the guidance of the guide inclined surface provided on the guide block 152. When the lifting drive assembly 151 drives the guide block 152 to move forward, the lifting track 153 will move downward under the action of gravity. It should be noted that a slider is provided at the bottom of the guide block 152, and a slide rail is provided on the line body 11. The slider and the slide rail slide together, so that the guide block 152 can move back and forth in a certain direction to drive the lifting track 153 to rise and fall.

[0049] According to one embodiment of the present invention, the lifting track 153 includes a track body and rollers rotatably mounted on the track body. Both ends of the track body are slidably engaged with the line 11, so that the track body can move up and down relative to the line 11. The rollers are in rolling engagement with the guide surfaces of the guide blocks 152. Since the friction of the rolling engagement is less than that of the sliding engagement, the moving guide blocks 152 can more easily drive the track body to rise and fall via the rollers. It should be noted that there are two lifting mechanisms 15, which are spaced apart along a direction perpendicular to the extension of the line 11, that is, spaced apart along a left-right direction, thereby increasing the stability of the connecting member 1221 that is driven to rise and fall by the lifting track 153.

[0050] like Figures 1-5As shown, in one embodiment, the material trolley conveying device 1 further includes a first guide rail 16. The first guide rail 16 is used to guide the connecting member 1221, which moves from the feed inlet 112 to the connecting station 111, to rise to a distance where the bottom surface of the connecting member 1221 is spaced apart from the top surface of the transport vehicle body 141. The first guide rail 16 is connected to the line 11 and is located on the side of the lifting track 153 facing the feed inlet 112. The lifting track 153 includes a lifting position and a lowering position. The lifting drive assembly 151 can drive the lifting track 153 to reciprocate between the lifting position and the lowering position through the guide block 152. When the lifting track 153 is in the lifting position, it is spliced ​​with the first guide rail 16. When the lifting track 153 is in the lowering position, the connecting member 1221 is used to connect with the transport vehicle body 141. By setting the first guide rail 16, the connecting piece 1221 is lifted under the guidance of the first guide rail 16 during the process of the material trolley 12 moving to the connecting station 111. Since the lifting rail 153 is connected to the first guide rail 16 when in the lifting position, the connecting piece 1221 will still be lifted by the lifting rail 153 after leaving the first guide rail 16, so that the bottom surface of the connecting piece 1221 is higher than the top surface of the transport vehicle body 141. This arrangement allows the transport vehicle body 141 to wait for the arrival of the material trolley 12 at the connecting station 111 in advance, without worrying about interference between the transport vehicle body 141 and the connecting piece 1221. If the connecting piece 1221 is lifted by the rising of the lifting rail 153 after the material trolley 12 moves to the connecting station 111, then the transport vehicle body 141... The material trolley 141 can only enter the connection station 111 after the connector 1221 has been lifted; otherwise, it will interfere with the connector 1221. This design without the first guide rail 16 undoubtedly requires more time to complete the connection between the connector 1221 and the material trolley body. By setting the first guide rail 16, the transport vehicle body 141 can wait in advance at the connection station 111 without waiting for the connector 1221 to be lifted. Secondly, the lifting rail 153 can move to the lifting position during the material trolley 12's movement towards the connection station 111, thus saving the time required to lift the connector 1221 via the lifting rail 153 after the material trolley 12 has moved to the connection station 111. Therefore, adding the first guide rail 16 effectively improves the efficiency of transporting the material trolley 12. It should be noted that the number of first guide rails 16 and lifting rails 153 are the same and they are set in a one-to-one correspondence.

[0051] According to one embodiment of the present invention, the connector 1221 is a pin, and the connecting assembly 122 further includes a roller 1222. The pin is slidably engaged with the material trolley body 121 so that the pin can slide up and down relative to the material trolley body 121. The roller 1222 is rotatably mounted on the pin and is used to roll with the first guide rail 16 and the lifting rail 153. During the process of the material trolley 12 moving towards the connecting station 111, the first guide rail 16 rolls with the roller 1222, thereby allowing the roller to move up and down. 1222 drives the pin shaft to rise. As the material trolley body 121 moves, the roller 1222 rolls from the first guide rail 16 to the lifting rail 153 located in the lifting position. The top surface of the transport vehicle body 141 is provided with a pin hole 14111 for the pin shaft to be inserted. When the material trolley body 121 is located in the connection station 111, the pin shaft is suspended above the pin hole 14111. When the lifting rail 153 descends, the pin shaft will fall under the action of gravity and be inserted into the pin hole 14111, thereby completing the connection with the transport vehicle body 141.

[0052] like Figure 2 , Figures 11-14As shown, in one embodiment, the first trolley mechanism 13 includes a trolley drive assembly 131, a bracket 132, a first swing arm 133, and a first reset assembly 134. The bracket 132 includes a frame body 1323 and a first limiting block 1321 connected to each other. The first swing arm 133 includes a trolley portion 1331, a first connecting portion 1332, and a first movable portion 1333 connected in sequence. The trolley portion 1331 is used to abut against the material trolley body 121. The trolley portion 1331 includes a first sidewall 13311 and a second sidewall 13312 disposed opposite to each other. The first connecting portion 1332 is hinged to the frame body 1323 and can rotate relative to the frame body 1323, so that the first sidewall 13311 can abut against the material trolley body 121 traveling in the direction of travel, and so that the material trolley body... 121 can push the first sidewall 13311 to rotate in the first direction; the first reset assembly 134 is installed on the frame body 1323 and is connected to the first movable part 1333. When the material trolley body 121 moves in the traveling direction until the first sidewall 13311 separates from the pusher part 1331, the first reset assembly 134 can drive the pusher part 1331 to move and reset in the second direction opposite to the first direction; the first limit block 1321 is used to abut against the first movable part 1333 to restrict the first movable part 1333 from moving in the second direction; the pusher drive assembly 131 is used to drive the second sidewall 13312 of the first swing arm 133 to abut against the material trolley body 121 through the frame body 1323 to drive the material trolley body 121 to move in the traveling direction. The material trolley body 121 can travel from the production line 11 to the AGV trolley 212, or vice versa. Taking the material trolley body 121 moving from the AGV trolley 212 to the production line 11 as an example, the AGV trolley 212 drives the material trolley body 121 to move. The moving material trolley body 121 will first contact the first side wall 13311. As the material trolley body 121 continues to move, because the first connecting part 1332 is hinged to the frame body 1323 and can rotate relative to the frame body 1323, the moving material trolley body 121 can push the first side wall 13311 to rotate in a first direction, where the first direction is... Figure 12 The counter-clockwise direction shown is used to allow the first swing arm 133 to avoid interference with the moving material cart body 121. As the material cart body 121 continues to move, it also moves relative to the first side wall 13311. When the material cart body 121 separates from the first side wall 13311, since the first reset assembly 134 is connected to the first movable part 1333, the first reset assembly 134 can drive the pusher part 1331 to rotate and reset along the second direction through the first movable part 1333. The second direction is... Figure 12As shown, in the clockwise direction, the AGV trolley 212 stops moving. At this time, the AGV trolley 212 is located at the feed inlet 112 of the line 11. The trolley drive assembly 131 drives the second side wall 13312 of the first swing arm 133 to abut against the material trolley body 121 through the frame body 1323. Since the frame body 1323 is provided with a first limiting block 1321, and the first limiting block 1321 is used to restrict the movement of the first movable part 1333 in the second direction, the trolley drive assembly 131 can push the material trolley body 121 to continue moving in the direction of travel of the material trolley body 121 through the second side wall 13312 of the first swing arm 133, thereby pushing the material trolley body 121 from the AGV trolley 212 to the line 11. This process does not require human intervention, thus saving manpower. It should be noted that the principle of moving the material trolley body 121 from the line 11 to the AGV trolley 212 is similar, and will not be described in detail here. Therefore, the material trolley conveying device 1 enables the material trolley body 121 to move from the AGV trolley 212 to the line 11 and from the line 11 to the AGV trolley 212 without the need for personnel to assist in pushing the material trolley body 121, thereby saving manpower.

[0053] The first reset assembly 134 includes a first elastic element 1341 and a first guide rod 1342. The bracket 132 also includes a first mounting platform 1324. The first mounting platform 1324 has a first through hole 13241 for the first guide rod 1342 to pass through. The first guide rod 1342 includes a first connecting end 13421 and a first mounting end 13422 that are disposed opposite to each other. The first connecting end 13421 is hinged to the first movable part 1333. One end of the first elastic element 1341 is connected to the first mounting end 13422, and the other end of the first elastic element 1341 is connected to the first mounting platform 1324. The first elastic element 1341 can be a spring. When the material trolley body 121 pushes the first side wall 13311 to rotate in the first direction, the first movable part 1333 drives the first guide rod 1342 to slide relative to the first mounting platform 1324, and the first elastic element 1341 is compressed by force. When the material trolley body 121 separates from the first side wall 13311, the first side wall 13311 loses the force applied to it by the material trolley body 121, so that the first elastic element 1341 can drive the first guide rod 1342 to move in the opposite direction to the previous moving direction, thereby driving the first swing arm 133 to rotate in the second direction, and thus realizing the automatic reset of the first swing arm 133.

[0054] Furthermore, in one embodiment, the first trolley mechanism 13 further includes a second swing arm 135. The first swing arm 133 and the second swing arm 135 are arranged sequentially along the traveling direction of the material trolley body 121. The second swing arm 135 includes a limiting part 1351, a second connecting part 1352 and a second movable part 1353 connected in sequence. The second connecting part 1352 is hinged to the frame body 1323 and can swing relative to the frame body 1323. The support 132 further includes a second limiting block 1322. The second limiting block 1322 is connected to the frame body 1323. The second limiting block 1322 is used to abut against the second connecting part 1352 to limit the swing of the second swing arm 135 along the first direction. The limiting part 1351 is used to abut against the material trolley body 121 after it is separated from the second side wall 13312. When the trolley drive assembly 131 pushes the material trolley body 121 to move via the bracket 132 and the first swing arm 133, the moving material trolley body 121 generally maintains contact with the second side wall 13312. However, if the moving speed of the material trolley body 121 exceeds the moving speed of the first swing arm 133, the material trolley body 121 will separate from the second side wall 13312. If this overspeeding phenomenon of the material trolley body 121 is not controlled, it may cause the material trolley body 121 to collide with the material trolley body 121 located in front of it. Furthermore, if the material trolley body 121 encounters an emergency in its direction of travel and needs to stop, the trolley drive assembly 131 can only drive the material trolley body 121 to move via the first swing arm 133, but cannot drive it to stop, thus posing a certain safety hazard. To solve the above problems, a second swing arm 135 is added. When the material trolley body 121 and the second side wall 13312 are in contact, the second swing arm 135 is added. When 3312 separates, the material trolley body 121 will move in the direction of the second swing arm 135. After contacting the second swing arm 135, if the speed of the material trolley body 121 is greater than the moving speed of the support 132, the material trolley body 121 can drive the second swing arm 135 to rotate in the first direction. However, since the support 132 is provided with a second limiting block 1322, the second limiting block 1322 is used to restrict the second swing arm 135 from rotating in the first direction. That is, when the second swing arm 135 abuts against the second limiting block 1322, the material trolley body 121 cannot continue to drive the second swing arm 135 to rotate in the first direction. The second swing arm 135 will apply a force to the material trolley body 121 in the opposite direction of its movement to reduce the moving speed of the material trolley body 121. This controls the overspeed phenomenon of the material trolley body 121 and can prevent the movement of the material trolley body 121 when it is necessary to stop moving.

[0055] Furthermore, in one embodiment, the first trolley mechanism 13 further includes a guide rail 137 and a guide wheel 138. The second movable part 1353 includes a clearance position 13531. The guide wheel 138 is rotatably mounted on the second movable part 1353. The guide rail 137 is used to roll with the guide wheel 138 so that the moving guide wheel 138 can drive the second movable part 1353 to move along the second direction to the clearance position 13531 under the guidance of the guide rail 137, so as to avoid the material trolley body 121. Taking the material trolley body 121 moving from the AGV trolley 212 to the line 11 as an example, before the material trolley body 121 moves to the line 11, the trolley drive assembly 131 generally controls the bracket 132 to move to the entrance of the line 11, waiting for the arrival of the material trolley body 121 in advance, thereby improving the transportation efficiency. During the process of the bracket 132 moving to the entrance, the guide wheel 138, under the action of the guide rail 137, drives the second movable part 1353 to rotate in the second direction. When the bracket 132 moves... When the material trolley body 121 reaches the designated position at the entrance of line 11, the second movable part 1353 moves to the clearance position 13531. At this time, the material trolley body 121 moves along the travel direction of the material trolley body 121 under the drive of the AGV trolley 212. When the material trolley body 121 separates from the second side wall 13312, even if the material trolley body 121 continues to move along the travel direction, since the second movable part 1353 is located at the clearance position 13531, it will not interfere with the moving material trolley body 121.

[0056] Moreover, in one embodiment, the extension direction of the guide rail 137 is consistent with the movement direction of the frame body 1323. The guide rail 137 includes a first guide portion, a connecting portion and a second guide portion connected in sequence. Both the first guide portion and the second guide portion are used to guide the moving guide wheel 138 to drive the second movable portion 1353 to move along the second direction to the avoidance position 13531. Normally, the first trolley mechanism 13 transports the material trolley body 121 to the connection station 111 on the line 11. The material trolley body 121 is connected to the transport vehicle 14 on the line 11, and the transport vehicle 14 drives the material trolley body 121 to continue moving in the direction of travel. Therefore, in order to avoid interference between the material trolley body 121, which is moved by the transport vehicle 14, and the second movable part 1353, a second guide part is provided. The second guide part is provided corresponding to the connection station 111. The second guide part is used to guide the second movable part 1353 to move to the clearance position 13531 after the bracket 132 moves to the connection station 111, thereby preventing the second movable part 1353 from interfering with the material trolley body 121. The first guide part is provided corresponding to the entrance of the line 11.

[0057] In another embodiment, the first trolley mechanism 13 further includes a second reset assembly 136, which includes a second elastic element 1361 and a second guide rod 1362. The bracket 132 also includes a second mounting platform 1325, which has a second through hole 13251 through which the second guide rod 1362 passes. The second guide rod 1362 includes a second connecting end 13621 and a second mounting end 13622 disposed opposite to each other. The second connecting end 13621 is hinged to the second movable part 1353. One end of the second elastic element 1361 is connected to the second mounting end 13622, and the other end of the second elastic element 1361 is connected to the second mounting platform 1325. When the guide wheel 138 rolls with the connecting part, the second elastic element 1361 can drive the second movable part 1353 to rotate and reset in the first direction through the second guide rod 1362. By adding a second reset component 136, after the guide wheel 138 leaves the first guide section and the second guide section, the second elastic element 1361 can drive the second movable part 1353 to rotate and reset in the first direction via the second guide rod 1362. Taking the guide wheel 138 leaving the first guide section as an example, a loading station is set at the entrance of the line 11. When the AGV trolley 212 moves to the loading station, the material trolley body 121 on the AGV trolley 212 separates from the first side wall 13311, and the trolley drive component 131 drives the first swing arm 133 to move towards the material trolley body 121 via the bracket 132. The direction of movement is adjusted so that the second sidewall 13312 abuts against the material trolley body 121, and drives the material trolley body 121 to move along the direction of travel. As the bracket 132 moves along the direction of travel of the material trolley body 121, the guide wheel 138 gradually moves away from the first guide part. Under the action of the second elastic element 1361, the second swing arm 135 gradually rotates and resets itself by avoiding the displacement 13531, so that the second swing arm 135 can control the overspeed phenomenon of the material trolley body 121, or reduce the travel speed of the material trolley body 121 until the material trolley body 121 stops moving.

[0058] In one embodiment, the material trolley conveying device 1 further includes a support frame 18, which includes a base 181 and a slide rail 182 connected to each other. The trolley mechanism also includes a first roller 1391, which is rotatably mounted on the frame body 1323 and rolls with the slide rail 182. By setting the first roller 1391 to roll with the slide rail 182, the trolley drive assembly 131 can more easily drive the frame body 1323 to move. It should be noted that the trolley drive assembly 131 can drive the frame body 1323 to move via a motor and chain transmission, that is, the chain is connected to the frame body 1323 so that the motor can drive the frame body 1323 to move when it drives the chain to move; the trolley drive assembly 131 can also be a motor and a gear and rack transmission, where the motor drives the gear to rotate, the gear drives the rack to move, and the rack is connected to the frame body 1323, thereby realizing the reciprocating movement of the frame body 1323 driven by the motor.

[0059] In one embodiment, there are two slide rails 182, with their openings spaced apart. There are at least two first rollers 1391, with each slide rail 182 engaging with at least one first roller 1391. The trolley mechanism also includes a second roller 1392, rotatably mounted on the frame body 1323, located between the two slide rails 182, and used to engage with either of the two slide rails 182. By providing at least two first rollers 1391, the stability of the frame body 1323's movement can be effectively increased. By providing the second rollers 1392, regardless of whether the frame body 1323's center of gravity is biased towards either of the two slide rails 182, there is always a slide rail 182 engaging with the second roller 1392, thus ensuring the stability and reliability of the frame body 1323's movement.

[0060] like Figure 3 , Figure 4 and Figure 8As shown, the transport vehicle body 141 includes a vehicle body 1411, a connecting frame 1412, and wheels 1413. The connecting frame 1412 is connected to the vehicle body 1411, and the wheels 1413 are rotatably mounted on the connecting frame 1412. The line 11 is provided with a travel track, and the wheels 1413 roll in cooperation with the track. The drive assembly 142 is used to drive the vehicle body 1411 to move. The drive assembly 142 drives the vehicle body 1411 to move through the connecting frame 1412. The top surface of the vehicle body 1411 has pin holes 14111. There can be multiple vehicle bodies 1411, and adjacent vehicle bodies 1411 are connected by connectors 1221. There can also be multiple connectors 1221, with each connector 1221 corresponding to a vehicle body 1411. By increasing the number of pins engaging with pin holes 14111, the force on each pin is reduced, preventing damage due to excessive force. It should be noted that the car body 1411 is hinged to the connecting frame 1412, so that the car body 1411 can not only drive the material trolley 12 to move in the opposite direction in a straight line, but also drive the material trolley 12 to turn. It should also be noted that the drive assembly 142 includes a drive component 1421, an active turntable 1422 and an auxiliary turntable 1423. The auxiliary turntable 1423 is rotatably mounted on the line body 11. The connecting frame 1412 is located between the active turntable 1422 and the auxiliary turntable 1423, that is, the connecting frame 1412 is sandwiched between the active turntable 1422 and the auxiliary turntable 1423. The drive component 1421 is used to drive the active turntable 1422 to rotate, thereby driving the connecting frame 1412 to move, and then driving the material trolley 12 to move through the connecting frame 1412 and the car body 1411.

[0061] like Figure 2 and Figure 5As shown, in one embodiment, the material trolley conveying device 1 further includes a clamping mechanism 17. The clamping mechanism 17 includes a material trolley clamping assembly 171, which includes a fixed frame 1711, a clamping drive 1712, a first clamping arm 1713, a second clamping arm 1714, and a transmission arm 1715. The output shaft of the clamping drive 1712 is hinged to the first clamping arm 1713. Both the first clamping arm 1713 and the second clamping arm 1714 are hinged to the fixed frame 1711. One end of the transmission arm 1715 is hinged to the first clamping arm 1713, and the other end of the transmission arm 1715 is hinged to the second clamping arm 1714, so that the clamping drive 1712 can drive the first clamping arm 1713 and the second clamping arm 1714 to clamp or release the material trolley body 121. After the material trolley body 121 moves to the connection station 111, in order to prevent the material trolley body 121 from moving relative to the line 11 and to ensure that the material trolley body 121 stops accurately, a clamping mechanism 17 is set to clamp the material trolley body 121 so that the material trolley body 121 stops accurately at the connection station 111, preventing the material trolley body 121 from moving relative to the frame, and ensuring that the pin can be accurately inserted into the pin hole 14111. It should be noted that the clamping drive component 1712 can be a cylinder, hydraulic cylinder, etc. The clamping drive component 1712 drives the first clamping arm 1713 to rotate relative to the fixed frame 1711. The rotating first clamping arm 1713 then drives the second clamping arm 1714 to rotate through the transmission arm 1715, so that the first clamping arm 1713 and the second clamping arm 1714 can clamp or release the material trolley body 121. The movement of the first clamping arm 1713 and the second clamping arm 1714 can be simultaneously driven by a single clamping drive component 1712, which is simple in structure.

[0062] Furthermore, the present invention also provides a material transport system 2, such as Figure 1 and Figure 2As shown, the material transport system 2 includes a material trolley carrying device 21 and the aforementioned material trolley conveying device 1. The material trolley conveying device 1 also includes a second trolley mechanism 19. The line 11 is also provided with a discharge port 113. The second trolley mechanism 19 is used to move the material trolley 12 located on the line 11 to the material trolley carrying device 21 located at the discharge port 113. Since the material transport system 2 adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here. Among them, the first trolley mechanism 13 and the second trolley mechanism 19 have the same structure, the difference being that the first trolley mechanism 13 is set to the inlet 112, while the second trolley mechanism 19 is set to the outlet 113. The first trolley mechanism 13 is used to move the material trolley 12 from the material trolley carrying device 21 to the line 11, and the second trolley mechanism 19 is used to move the material trolley 12 from the line 11 to the material trolley carrying device 21. It should be noted that there are two support frames 18, one of which corresponds to the first trolley mechanism 13 and the other corresponds to the second trolley mechanism 19.

[0063] like Figures 1-10 As shown, in one embodiment, the material transport system 2 further includes a second guide rail 20, which is positioned near the discharge port 113. This allows the connecting member 1221 to separate from the transport vehicle body 141 under the guidance of the second guide rail 20 as the material trolley body 121 passes through it. By setting the second guide rail 20, the second pushing mechanism 19 drives the material trolley 12 to move along the second guide rail 20. Under the guidance of the second guide rail 20, the roller 1222 drives the pin to rise, thereby pulling the pin out of the pin hole 14111. After the pin is pulled out, the transport vehicle body 141 stops moving, and the second pushing mechanism 19 continues to drive the material trolley 12 towards the discharge port 113, thus achieving the separation of the pin from the transport vehicle body 141. Since the separation of the pin from the transport vehicle body 141 occurs during the movement of the material trolley 12, it does not affect the transport efficiency of the material trolley 12, thus ensuring the transport efficiency of the material trolley 12.

[0064] In one embodiment, the material trolley transport device 21 includes an AGV 211 and an AGV trolley 212 located on the AGV 211. The AGV trolley 212 includes an AGV trolley body 2121 and a limiting assembly 2122. The limiting assembly 2122 includes a mounting frame 21221, a limiting member 21222, a transmission member 21223, a swing member 21224, and a torsion spring 21225. The limiting member 21222 slides in cooperation with the mounting frame 21221. The mounting frame 21221 is connected to the AGV trolley body 2121. The swinging component 21224 includes a connecting end, a mounting part, and a swinging end connected in sequence. One end of the transmission component 21223 is hinged to the connecting end, and the other end of the transmission component 21223 is hinged to the limiting block. The limiting block is slidably engaged with the mounting frame 21221. The mounting part is hinged to the mounting frame 21221. One end of the torsion spring 21225 is connected to the mounting part, and the other end of the torsion spring 21225 is connected to the mounting frame 21221. The torsion spring 21225 drives the limiting component 21222 to move upward relative to the mounting frame 21221 through the swinging component 21224 and the transmission component 21223, so that the limiting component 21222 can restrict the material trolley body 121 located on the AGV trolley body 2121 from moving towards the direction where the limiting component 21222 is located.

[0065] According to an embodiment of the present invention, the material transport system 2 further includes two extension devices 22. The two extension devices 22 are respectively provided for the feed inlet 112 and the discharge outlet 113 of the line 11. Taking the extension device 22 provided for the feed inlet 112 as an example, when the material trolley 12 moves to the feed inlet 112 with the material trolley transport device 21, the extension device 22 drives its extension shaft to extend. The extension shaft is used to abut against the swing end of the swing member 21224 and drive the swing member 21224 to rotate relative to the mounting frame 21221. The swing member 21224 then drives the limiting member 21222 to move downward relative to the mounting frame 21221 through the transmission member 21223 to cancel the limiting of the material trolley body 121, so that the material trolley body 121 can move onto the line 11 under the drive of the first pusher mechanism 13. The principle of the extension device 22 corresponding to the discharge port 113 is similar. Its purpose is to drive the limiting member 21222 to descend before the second trolley mechanism 19 moves the material trolley body 121 to the AGV trolley body 2121, so as to avoid interference with the material trolley body 121. After the material trolley body 121 moves onto the AGV trolley body 2121, the extension device 22 resets its extension shaft. The swing member 21224, lacking the force of the extension shaft of the extension device 22, will drive the limiting member 21222 to move upward through the swing member 21224 and the transmission member 21223 under the action of the torsion spring 21225, thereby restricting the material trolley body 121 on the AGV trolley body 2121 from moving towards the limiting member 21222.

[0066] According to another embodiment of the present invention, there are two limiting components 2122. The two limiting components 2122 are arranged at intervals along the traveling direction of AGV 211. The purpose is to prevent the material trolley body 121 located on the AGV trolley body 2121 from moving relative to the AGV trolley body 2121 during the travel of AGV 211, thereby avoiding the phenomenon that the material trolley body 121 falls off the AGV trolley body 2121 due to the lack of limiting.

[0067] In one embodiment, the AGV 211 includes a carrier body 2111 and at least two positioning components 2112. Each positioning component 2112 includes a positioning drive and a positioning element. The positioning drive is mounted on the carrier body 2111. The AGV trolley body 2112 has at least two positioning holes, each with a corresponding positioning element. The positioning drive drives the positioning element to move up and down, allowing the positioning element to enter or leave the positioning hole. By providing at least two positioning components 2112, the positioning element of each positioning component 2112 can complete the positioning of the AGV trolley body 2121 by passing through its corresponding positioning hole, thereby preventing the AGV trolley body 2121 from falling because it cannot turn with the carrier body 2111 when it turns. It should be noted that the at least two positioning components 2112 are spaced apart.

[0068] According to one embodiment of the present invention, the material transport system 2 further includes an AGV trolley clamping assembly 172, which has the same structure as the material trolley clamping assembly 171. The AGV trolley clamping assembly 172 is used to clamp or release the AGV trolley body 2121. Taking the AGV trolley body 2121 moving to the feed inlet 112 of the line 11 as an example, the AGV trolley clamping component 172 clamps the AGV trolley body 2121, thereby preventing the AGV trolley body 2121 from moving during the process of the pushing mechanism moving the material trolley 12 located on the AGV trolley body 2121 to the line 11, which would cause the material trolley 12 to fall and be damaged. During the process of the pushing mechanism moving the material trolley 12 from the line 11 to the AGV trolley body 2121, the AGV trolley clamping component 172 also clamps the AGV trolley body 2121 to prevent the material trolley 12 from falling and being damaged.

[0069] The transportation process of the material transport system 2 is as follows: the first trolley mechanism 13 moves to the feed inlet 112 to wait, while the material trolley carrying device 21 carries the material trolley 12 and moves towards the feed inlet 112. When the material trolley 12 moves to the feed inlet 112, the AGV trolley clamping assembly 172 clamps the AGV trolley body 2121, and the extension device 22 drives its extension shaft to extend. This causes the limiting member 21222 to move downward through the swing member 21224 and the transmission member 21223, thereby releasing the restriction on the material trolley 12 towards the feed inlet 112. Then, the material trolley is transported by the first trolley mechanism. Mechanism 13 moves the material trolley 12 from the AGV trolley body 2121 onto the line 11 and towards the connecting station 111. After the material trolley 12 moves to the line 11, the AGV trolley clamping assembly 172 releases its clamp on the AGV trolley body 2121, the material trolley carrying device 21 leaves the position of the feed inlet 112, and the extension device 22 resets. During the process of the first pushing mechanism 13 pushing the material trolley 12 towards the connecting station 111, the lifting drive assembly 151 drives the lifting rail 153 to rise to the lifting position through the guide block 152, and the drive assembly 142 drives the connecting frame 1412. The drive vehicle body moves to the connection station 111 to wait. The rollers 1222 on the connector 1221 first roll on the first guide rail 16. As the material trolley body 121 moves, the rollers 1222 on the connector 1221, guided by the first guide rail 16, drive the connector 1221 upward. Since the lifting rail 153 is connected to the first guide rail 16 when it is in the lifting position, the connector 1221 will still be lifted by the lifting rail 153 after it leaves the first guide rail 16, so that the bottom surface of the connector 1221 remains higher than the top surface of the transport vehicle body 141. When the material trolley body 121 moves to the connection station 111, the clamping drive component 1712 drives the first clamping arm 1713 to rotate relative to the fixed frame 1711. The rotating first clamping arm 1713 then drives the second clamping arm 1714 to rotate through the transmission arm 1715, so that the first clamping arm 1713 and the second clamping arm 1714 clamp the material trolley body 121, thereby completing the positioning of the material trolley body 121. The lifting drive component 151 then drives the lifting rail 153 to descend through the guide block 152, so that the connecting piece 1221 can be inserted into the pin hole 14111 set on the top surface of the trolley body 1411.When the drive assembly 142 moves the car body 1411, it can also move the material trolley body 121 on the production line 11 via the connector 1221. After the material on the material trolley 12 is processed on the production line 11, the car body 1411 moves the material trolley body 121 to the standby position of the second push mechanism 19. Then, the second push mechanism 19 pushes the material trolley 12 towards the discharge port 113 of the production line 11. At the same time, the material trolley transport device... 21 moves towards the discharge port 113. After the material trolley carrying device 21 moves to the discharge port 113, the AGV trolley clamping assembly 172 clamps the AGV trolley body 2121, and the extension device 22 drives its extension shaft to extend. This causes the limiting member 21222 to move downward through the swing member 21224 and the transmission member 21223, preventing the material trolley 12 moving from the line 11 to the AGV trolley body 2121 from interfering with the limiting member 21222. When the vehicle body 1411 moves the material trolley body 121 past the second guide rail 20, the rollers 1222 on the connector 1221, guided by the second guide rail 20, will cause the connector 1221 to rise, so that the connector 1221 is pulled out from the pin hole 14111. After the connector 1221 is pulled out, the drive assembly 142 drives the vehicle body 1411 to stop moving. The material trolley body 121 will continue to move towards the discharge port 113 under the drive of the second pusher mechanism 19, thus completing the separation from the vehicle body 1411. The second pusher mechanism 19 then moves the material trolley body 121 onto the AGV trolley body 2121, and the extension device 22 resets, thereby limiting the material trolley body 121. After the limiting is completed, the material trolley carrying device 21 transports the material trolley 121 away from the discharge port 113. The whole process does not require personnel intervention, saving manpower, reducing the labor intensity of operators, and also reducing production costs.

[0070] The above are merely preferred embodiments of the present invention and do not limit the patent scope of the present invention. Any equivalent structural transformations made under the concept of the present invention using the contents of the specification and drawings of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A material trolley conveying device, characterized in that, include: The production line is provided with a connecting station and a feeding port, with the connecting station located near the feeding port. A material trolley, the material trolley including a material trolley body and a connecting assembly, the connecting assembly including a connector; A first trolley mechanism is provided corresponding to the feed inlet to move the material trolley body located at the feed inlet to the connecting station. The transport vehicle includes a transport vehicle body and a drive assembly that are connected by a transmission, the drive assembly being used to drive the transport vehicle body to move on the line; A lifting mechanism is provided at the connection station. The lifting mechanism is used to drive the connector located at the connection station to descend so that the connector located at the connection station is connected to the transport vehicle body. The first trolley mechanism includes a trolley drive assembly, a bracket, a first swing arm, and a first reset assembly. The bracket includes a frame body and a first limiting block connected to each other. The first swing arm includes a trolley section, a first connecting section, and a first movable section connected in sequence. The trolley section is used to abut against a material trolley. The trolley section includes a first sidewall and a second sidewall disposed opposite to each other. The first connecting section is hinged to the frame body and can rotate relative to the frame body, so that the first sidewall can abut against the material trolley traveling in the direction of travel, and the material trolley can push the first sidewall to rotate in a first direction. A reset assembly is installed on the frame body. The first reset assembly is connected to the first movable part. When the material trolley moves along the travel direction to the point where it separates from the first side wall and the pusher part, the first reset assembly can drive the pusher part to move and reset along a second direction opposite to the first direction. The first limiting block is used to abut against the first movable part to restrict the movement of the first movable part along the second direction. The drive assembly is used to drive the second side wall of the first swing arm to abut against the material trolley through the frame body to drive the material trolley to move along the travel direction.

2. The material trolley conveying device according to claim 1, characterized in that, The lifting mechanism includes a lifting drive assembly, a guide block, and a lifting rail. The lifting rail is slidably connected to the line body, the guide block is connected to the lifting rail, and the lifting drive assembly is driven to the guide block to drive the lifting rail to rise and fall through the guide block.

3. The material trolley conveying device according to claim 2, characterized in that, The material trolley conveying device further includes a first guide rail, which guides the connector moving from the feed inlet to the connecting station to rise to a position where the bottom surface of the connector is spaced apart from the top surface of the transport vehicle body. The first guide rail is connected to the line and is located on the side of the lifting track facing the feed inlet. The lifting track includes a lifting position and a lowering position. The lifting drive assembly can drive the lifting track to reciprocate between the lifting position and the lowering position through the guide block. When the lifting track is in the lifting position, it is connected to the first guide rail. When the lifting track is in the lowering position, the connector is connected to the transport vehicle body.

4. The material trolley conveying device according to claim 1, characterized in that, The first reset assembly includes a first elastic element and a first guide rod. The bracket also includes a first mounting platform. The first mounting platform has a first through hole through which the first guide rod passes. The first guide rod includes a first connecting end and a first mounting end disposed opposite to each other. The first connecting end is hinged to the first movable part. One end of the first elastic element is connected to the first mounting end, and the other end of the first elastic element is connected to the first mounting platform.

5. The material trolley conveying device according to any one of claims 1 to 4, characterized in that, The transport vehicle body includes a vehicle body, a connecting frame, and wheels. The connecting frame is connected to the vehicle body, and the wheels are rotatably mounted on the connecting frame. The line is provided with a travel track, and the wheels roll in cooperation with the track. The drive assembly is used to drive the vehicle body to move.

6. The material trolley conveying device according to any one of claims 1 to 4, characterized in that, The material trolley conveying device further includes a clamping mechanism, which includes a material trolley clamping assembly. The material trolley clamping assembly includes a fixed frame, a clamping drive, a first clamping arm, a second clamping arm, and a transmission arm. The output shaft of the clamping drive is hinged to the first clamping arm. Both the first and second clamping arms are hinged to the fixed frame. One end of the transmission arm is hinged to the first clamping arm, and the other end of the transmission arm is hinged to the second clamping arm, so that the drive can drive the first and second clamping arms to clamp or release the material trolley body.

7. A material transport system, characterized in that, The material transport system includes a material trolley carrying device and a material trolley conveying device according to any one of claims 1 to 6. The material trolley conveying device further includes a second trolley mechanism. The line is also provided with a discharge port. The second trolley mechanism is used to move the material trolley located on the line to the material trolley carrying device located at the discharge port.

8. The material transport system according to claim 7, characterized in that, The material transport system also includes a second guide rail, which is located near the discharge port, so that the connecting member can separate from the transport vehicle body under the guidance of the second guide rail as the material trolley body passes through the second guide rail.

9. The material transport system according to claim 7 or 8, characterized in that, The material handling device includes an AGV and an AGV trolley located on the AGV. The AGV trolley includes an AGV trolley body and a limiting assembly. The limiting assembly includes a mounting frame, a limiting member, a transmission member, a swing member, and a torsion spring. The limiting member is slidably engaged with the mounting frame. The mounting frame is connected to the AGV trolley body. The swing member includes a connecting end, a mounting part, and a swing end connected in sequence. One end of the transmission member is hinged to the connecting end, and the other end of the transmission member is hinged to the limiting block. The limiting block is slidably engaged with the mounting frame. The mounting part is hinged to the mounting frame. One end of the torsion spring is connected to the mounting part, and the other end of the torsion spring is connected to the mounting frame.

10. The material transport system according to claim 9, characterized in that, The AGV includes a carrier body and at least two positioning components. Each positioning component includes a positioning drive and a positioning component. The positioning drive is installed on the carrier body. The AGV trolley body has at least two positioning holes. Each positioning hole has a corresponding positioning component. The positioning drive is used to drive the positioning component to rise and fall, so that the positioning component enters or leaves the positioning hole.

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