Conveying system and conveying system control method

Abstract

The invention relates to a conveying system and a conveying system control method. The conveying system comprises an air track assembly, a conveying bearing assembly and a switching assembly. The aerial rail assembly comprises a plurality of initial special conveying rails, a public conveying rail and a plurality of tail special conveying rails, the inflow ends of the initial special conveying rails extend to the multiple workpiece feeding positions correspondingly, and the public conveying rail is located between the outflow ends of the initial special conveying rails and the inflow ends of the tail special conveying rails. The outflow ends of the plurality of tail special conveying rails extend to a plurality of unloading positions respectively; the switching assembly comprises a first switching piece and a second switching piece, the inflow end of the public conveying rail is selectively connected with the outflow end of one initial special conveying rail through the first switching piece, and the outflow end of the public conveying rail is selectively connected with the inflow end of one tail special conveying rail through the second switching piece. In the embodiment of the invention, the structure of the conveying system can be simplified, and the space occupied by the conveying system is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of automobile production, and in particular to a conveying system and a conveying system control method. Background Art

[0002] After completing processing in the production workshop, automotive parts need to be transported to the final assembly workshop or welding workshop. Ground transportation is a common method of transportation. However, ground transportation occupies a large area and can easily lead to abnormally busy ground logistics.

[0003] In order not to affect ground logistics and save ground space, aerial transportation can be achieved through EMS (Electric Monorail System).

[0004] However, the overhead conveying system is complex in structure for various types of automotive parts. Summary of the Invention

[0005] One of the purposes of the present invention is to provide a conveying system to solve the technical problem of the complex structure of the aerial conveying system for various types of automobile parts in the prior art; the second purpose is to provide a conveying system control method.

[0006] In order to achieve the above object, the technical solution adopted by the present invention is as follows:

[0007] A conveying system includes an overhead track assembly, a conveying carrier assembly, and a switching assembly, wherein the conveying carrier assembly is used to carry any one of a plurality of different types of workpieces and to travel on the overhead track assembly to convey the workpieces;

[0008] The aerial track assembly includes a plurality of start-specific conveying tracks, a common conveying track, and a plurality of end-specific conveying tracks. The inflow ends of the plurality of start-specific conveying tracks extend to a plurality of loading positions, respectively. The common conveying track is located between the outflow ends of the plurality of start-specific conveying tracks and the inflow ends of the plurality of end-specific conveying tracks. The outflow ends of the plurality of end-specific conveying tracks extend to a plurality of unloading positions, respectively.

[0009] The switching assembly includes a first switching member and a second switching member. The inflow end of the common conveying track is selectively connected to the outflow end of one of the starting dedicated conveying tracks through the first switching member, and the outflow end is selectively connected to the inflow end of one of the ending dedicated conveying tracks through the second switching member.

[0010] Furthermore, the aerial track assembly further comprises a plurality of lower-position tracks respectively located at the plurality of lower-position tracks, and each of the end-dedicated conveying tracks comprises a connecting section and an output section, wherein the inflow end of the connecting section is used to connect with the outflow end of the common conveying track, and the outflow end of the output section is used to connect with the lower-position track;

[0011] The aerial track assembly also includes a plurality of temporary storage tracks respectively used to be connected to the plurality of connecting segments. The switching assembly also includes an output switching member, which has a first state and a second state. The outflow end of the connecting segment is connected to the inflow end of the output segment through the output switching member in the first state, and is connected to the inflow end of the temporary storage track through the output switching member in the second state.

[0012] Furthermore, the connecting section includes an incoming section and an outgoing section, the incoming end of the incoming section is used to connect with the outgoing end of the common conveying track, and the outgoing end of the outgoing section is selectively connected with the output section or the temporary storage track through the output switching member;

[0013] The aerial track assembly also includes a plurality of return tracks, the inflow ends of the plurality of return tracks are respectively used to be connected to the outflow ends of the temporary storage tracks, and the switching assembly also includes a return switching member, which has a first state and a second state. The outflow end of the access section is connected with the inflow end of the outlet section through the return switching member in the first state, and the outflow end of the return track is connected with the inflow end of the outlet section through the return switching member in the second state.

[0014] Furthermore, the aerial track assembly further comprises a plurality of start-specific return tracks, a common return track, a plurality of end-specific return tracks and a plurality of upper-position tracks respectively located at a plurality of upper-position tracks, wherein the start-specific return tracks, the common return tracks and the end-specific return tracks are all used for the travel of the aerial transport bearing assembly;

[0015] The switching assembly also includes a third switching member and a fourth switching member. The inflow ends of the multiple starting dedicated return rails are respectively used to connect with the outflow ends of the multiple lower piece position rails. The inflow end of the common return rail is selectively connected with one of the starting dedicated return rails through the third switching member, and the outflow end is selectively connected with the inflow end of one of the last dedicated return rails through the fourth switching member. The outflow ends of the multiple last dedicated return rails are respectively used to connect with the inflow ends of the multiple upper piece position rails.

[0016] Furthermore, the workpiece is divided into a first workpiece and a second workpiece of different types;

[0017] The multiple starting dedicated return tracks include a first starting dedicated return track and a second starting dedicated return track, the multiple ending dedicated return tracks include a first ending dedicated return track and a second ending dedicated return track, the multiple temporary storage tracks include a first temporary storage track and a second temporary storage track, and the multiple return tracks include a first return track and a second return track.

[0018] Furthermore, the common return track includes a first sub-track, a second sub-track, and a third sub-track. The inflow end of the first sub-track is selectively connected to the outflow end of the first start-dedicated return track or the second start-dedicated return track through the third switching member. The outflow end of the third sub-track is selectively connected to the inflow end of the first end-dedicated return track or the second end-dedicated return track through the fourth switching member.

[0019] The switching assembly also includes a fifth switching member and a sixth switching member. The inflow end of the second sub-track is selectively connected to the outflow end of the first temporary storage track or the first sub-track through the fifth switching member, and the outflow end of the second sub-track is selectively connected to the inflow end of the third sub-track or the first return track through the sixth switching member.

[0020] Furthermore, the plurality of lower piece position tracks include a first lower piece position track and a second lower piece position track, the second start-dedicated return track includes a fourth sub-track, a fifth sub-track, and a sixth sub-track, the inflow end of the fourth sub-track is connected to the outflow end of the second lower piece position track, and the outflow end of the sixth sub-track is used to connect with the inflow end of the common return track through the third switching member;

[0021] The switching assembly further includes a seventh switching member and an eighth switching member, wherein the inflow end of the fifth sub-track is selectively connected to the outflow end of the second temporary storage track or the fourth sub-track via the seventh switching member, and the outflow end of the fifth sub-track is selectively connected to the inflow end of the sixth sub-track or the second return track via the eighth switching member.

[0022] Furthermore, the conveying system further comprises a plurality of loading elevators, wherein the loading elevators are connected to the corresponding loading rails, and the loading elevators are used to drive the loading rails to rise and fall, and the conveying bearing assembly located on the loading rails rises and falls with the rising and falling of the loading rails;

[0023] The loading rail has a high position and a low position, and the outflow end of the loading rail in the high position is connected with the inflow end of the starting dedicated conveying rail;

[0024] And / or, the conveying system further comprises a plurality of lowering elevators, the lowering elevators being connected to the corresponding lowering rails, the lowering elevators being used to drive the lowering rails to rise and fall, and the conveying bearing assembly located on the lowering rails rises and falls along with the lowering rails;

[0025] The lower piece position track has a high position state and a low position state, and the inflow end of the lower piece position track in the high position state is connected with the outflow end of the last dedicated conveying track.

[0026] Furthermore, the transport and carrying assembly includes a transport trolley and a carrying sling, wherein the transport trolley is used to travel on the aerial track assembly, and the carrying sling is used to carry the workpiece;

[0027] The upper piece position rail and / or the lower piece position rail are provided with a clamping assembly, and the clamping assembly is used to clamp the conveying trolley during the lifting and lowering process of the upper piece position rail and / or the lower piece position rail.

[0028] Furthermore, the conveying system also includes multiple loading devices, which are respectively used to load multiple different types of workpieces. The loading devices are used to grab the workpieces and place the workpieces into an empty conveying carrying assembly on a loading position track in a low position.

[0029] Furthermore, the length of the common conveying track is greater than the length of at least one of the non-dedicated conveying tracks;

[0030] And / or, the length of the common return track is greater than the length of at least one of the dedicated return tracks.

[0031] Furthermore, the conveying and carrying assembly includes a tag carrier, and the conveying system further includes a reader / writer, the reader / writer being located at a loading position, and the reader / writer being used to write identification information of a workpiece loaded at the loading position into the tag carrier, the identification information including the workpiece type and the vehicle type to which it belongs;

[0032] The transport system further includes a reader configured to read identification information stored on the tag carrier.

[0033] A conveying system control method is applied to the conveying system as described above, and the conveying system control method includes:

[0034] Acquiring a workpiece type of a workpiece conveyed by a conveyor carrying assembly traveling on a common conveyor track;

[0035] The second switching element is controlled according to the workpiece type.

[0036] Furthermore, after controlling the second switching element according to the workpiece type, the method further includes:

[0037] Obtain the vehicle model of the workpiece being transported by the conveyor support assembly traveling on the connecting section, and obtain the vehicle model currently to be assembled;

[0038] Determining whether the vehicle model is consistent with the vehicle model to be assembled;

[0039] If the vehicle type is consistent with the vehicle type to be assembled, the output switching element is controlled to operate in the first state;

[0040] If the vehicle type is inconsistent with the current vehicle type to be assembled, the output switching element is controlled to operate in the second state.

[0041] Beneficial effects of the present invention:

[0042] This track system can automatically and accurately and efficiently transport different types of workpieces from different loading locations to different unloading locations, without occupying ground logistics or space. In this embodiment, different types of workpieces share the same conveyor and carrier assembly, and at least the common conveyor track in the aerial track assembly is a shared track, which can simplify the conveyor system structure, reduce the space occupied by the conveyor system, and reduce fixed investment costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Figure 1 A schematic diagram of the overall structure of a conveying system provided in an embodiment of the present invention;

[0044] Figure 2 Schematic diagram of part of the structure of the conveying system provided in an embodiment of the present invention Figure 1 ;

[0045] Figure 3 Schematic diagram of part of the structure of the conveying system provided in an embodiment of the present invention Figure 2 ;

[0046] Figure 4 A schematic structural diagram of a loading elevator, loading rails, and a conveying bearing assembly in a conveying system provided in an embodiment of the present invention;

[0047] Figure 5 for Figure 4 A magnified schematic diagram of point A in the middle;

[0048] Figure 6 A schematic structural diagram of a conveying bearing assembly and a loading rail in a conveying system provided by an embodiment of the present invention;

[0049] Figure 7 for Figure 6 A magnified schematic diagram of point B in the middle;

[0050] Figure 8 for Figure 6 Enlarged schematic diagram of point C in the middle;

[0051] Figure 9 A three-dimensional schematic diagram of a loading elevator in a conveying system provided in an embodiment of the present invention;

[0052] Figure 10 A schematic front view of a loading elevator in a conveying system provided in an embodiment of the present invention;

[0053] Figure 11 A side view schematic diagram of a loading elevator in a conveying system provided in an embodiment of the present invention;

[0054] Figure 12 A partial schematic diagram of a loading elevator in a conveying system provided in an embodiment of the present invention;

[0055] Figure 13 A schematic structural diagram of the loading rail, the starting dedicated conveying rail and the positioning assembly in the conveying system provided in an embodiment of the present invention;

[0056] Figure 14 A schematic structural diagram of a clamping assembly in a conveying system provided by an embodiment of the present invention;

[0057] Figure 15 A schematic structural diagram of a conveying trolley in a conveying system provided in an embodiment of the present invention;

[0058] Figure 16 A schematic structural diagram of a load-bearing sling in a conveying system provided by an embodiment of the present invention;

[0059] Figure 17 A flow chart of the steps of a conveying system control method provided by an embodiment of the present invention;

[0060] Figure 18 A flowchart of another method for controlling a conveying system provided in an embodiment of the present invention.

[0061] Description of reference numerals:

[0062] 10- aerial track assembly, 11- loading position track, 111- first loading position track, 112- second loading position track, 12- initial dedicated conveying track, 121- first initial dedicated conveying track, 122- second initial dedicated conveying track, 13- common track, 131- common conveying track, 132- common return track, 1321- first sub-track, 1322- second sub-track, 1323- third sub-track, 14- end dedicated conveying track, 141- connecting section, 1411- access section, 1412- access section, 142- output section, 143- first end dedicated conveying track, 1431- first access section, 1432- first access section, 1433- first output section, 144- second end Dedicated conveyor track, 1441-second incoming section, 1442-second outgoing section, 1443-second outgoing section, 15-unloading track, 151-first unloading track, 152-second unloading track, 16-temporary storage track, 161-first temporary storage track, 162-second temporary storage track, 17-return track, 171-first return track, 172-second return track, 18-starting dedicated return track, 181-first starting dedicated return track, 182-second starting dedicated return track, 1821-fourth sub-track, 1822-fifth sub-track, 1823-sixth sub-track, 19-end dedicated return track, 191-first end dedicated return track, 192-second end dedicated return track;

[0063] 20-Conveyor bearing assembly, 21-Conveyor trolley, 211-Travel assembly, 2111-Front travel assembly, 2112-Auxiliary travel assembly, 2113-Rear travel assembly, 212-Rod assembly, 2121-Front impact rod, 2122-Middle connecting rod, 2123-Rear connecting rod, 2124-Rear connecting rod mounting seat, 213-Rear number plate, 214-Clamping rod, 215-Matching assembly, 2151-Lifting ear connector, 2152-Wire rope, 216-Column light, 217-Detection assembly, 2171-First detection Parts, 2172-second detection part, 218-carbon brush installation cover, 2181-front carbon brush installation cover, 2182-rear carbon brush installation cover, 219-electric control box bracket, 22-carrying sling, 221-carrier body, 222-upper frame, 223-balance wheel assembly, 224-side guide assembly, 225-jib, 226-oblique pull member, 227-sling lug, 228-support assembly, 2281-front support, 2282-rear support, 2283-front middle support, 2284-rear middle support;

[0064] 30-switching assembly, 31-first switching element, 32-second switching element, 33-third switching element, 34-fourth switching element, 35-fifth switching element, 36-sixth switching element, 37-seventh switching element, 38-eighth switching element, 39-end switching group, 391-output switching element, 3911-first output switching element, 3912-second output switching element, 392-return switching element, 3921-first return switching element, 3922-second return switching element;

[0065] 40 - Loading elevator, 41 - Lifting assembly, 411 - Driving mechanism, 412 - Driven mechanism, 413 - Belt assembly, 42 - Guide column, 43 - Lifting frame, 431 - Balancing frame, 432 - Lifting frame, 44 - Counterweight box, 45 - Mounting platform, 46 - Boom assembly, 47 - Stabilizing frame, 48 - Limit pin, 49 - Straightening track;

[0066] 50- clamping assembly, 51- mounting bracket, 52- first cylinder, 53- cylindrical gear, 54- driving clamping arm, 55- driven gear, 56- driven clamping arm; 60- lowering lifter; 70- loading device, 71- first loading device, 72- second loading device; 80- positioning assembly, 81- second cylinder, 82- guide rod, 83- positioning piece; 90- reader / writer. DETAILED DESCRIPTION

[0067] The following describes the embodiments of the present invention with reference to the accompanying drawings and preferred embodiments. Those skilled in the art will readily appreciate the other advantages and benefits of the present invention from the disclosure herein. The present invention may also be implemented or applied through various other specific embodiments, and the various details in this specification may be modified or altered based on different viewpoints and applications without departing from the spirit of the present invention. It should be understood that the preferred embodiments are intended only to illustrate the present invention and are not intended to limit the scope of protection of the present invention.

[0068] It should be noted that the illustrations provided in the following embodiments are merely schematic illustrations of the basic concept of the present invention. Therefore, the illustrations only show components related to the present invention and are not drawn according to the number, shape, and size of components in actual implementation. In actual implementation, the type, quantity, and proportion of each component may be changed arbitrarily, and the component layout may also be more complex.

[0069] Energy conservation, environmental protection, and safety are key concerns in the automotive industry, and lightweighting technology is a key approach to achieving these goals. The most direct way to achieve lightweighting is through the extensive use of aluminum alloys in automotive manufacturing. Aluminum alloys are widely used in automotive manufacturing due to their low density and high specific strength, significantly reducing weight while also significantly improving the rigidity of automotive parts. With the use of aluminum alloys, one-piece die-castings are gaining increasing popularity in automotive production due to their superior performance and the ability to integrate multiple components into a single, integrated structure, significantly reducing the number of parts.

[0070] Auto parts, such as one-piece die-castings, need to be transported to the final assembly workshop or welding workshop after processing in the production workshop. The most common mode of transportation is ground transportation. However, ground transportation occupies a large ground area and can easily lead to abnormally busy ground logistics. In order not to affect ground logistics and save ground space at the same time, aerial transportation can be achieved through EMS. However, for many different types of auto parts, the aerial transportation system has a complex structure. In order to solve the above problems, an embodiment of the present invention proposes a conveying system and a conveying system control method. The above-mentioned conveying system and conveying system control method are described in detail below.

[0071] First, refer to Figure 1 The conveying system provided by an embodiment of the present invention includes an aerial track component 10, a conveying carrying component 20 and a switching component 30. The conveying carrying component 20 is used to carry any one of multiple different types of workpieces and to travel on the aerial track component 10 to convey the workpieces; the aerial track component 10 includes multiple starting dedicated conveying tracks 12, a common conveying track 131 and multiple ending dedicated conveying tracks 14, the inflow ends of the multiple starting dedicated conveying tracks 12 respectively extend to multiple upper piece positions, the common conveying track 131 is located between the outflow ends of the multiple starting dedicated conveying tracks 12 and the inflow ends of the multiple ending dedicated conveying tracks 14, and the outflow ends of the multiple ending dedicated conveying tracks 14 respectively extend to multiple lower piece positions; the switching component 30 includes a first switching component 31 and a second switching component 32, the inflow end of the common conveying track 131 is selectively connected with the outflow end of a starting dedicated conveying track 12 through the first switching component 31, and the outflow end is selectively connected with the inflow end of a ending dedicated conveying track 14 through the second switching component 32.

[0072] The conveying system is an aerial conveying system. The workpiece is an automotive component, for example, an integral die-casting in an automobile. Integral die-castings are usually produced in a die-casting workshop. After production, the integral die-castings need to be transported to a welding workshop. Multiple different types of workpieces may include an integral die-casting for the cabin, an integral die-casting for the rear floor, and the like. The workpieces may be divided into two types, three types, and the like. When the workpieces are divided into two types, the workpieces are specifically divided into a first workpiece and a second workpiece. The first workpiece may be an integral die-casting for the rear floor, and the second workpiece may be an integral die-casting for the cabin.

[0073] The loading position is the area where the workpiece is loaded. Multiple loading positions correspond to different types of workpieces. The positions of each loading position are different. Figure 1 The area shown by W in the middle. The unloading position is the area where the workpiece is unloaded. Multiple unloading positions correspond to multiple different types of workpieces. The positions of each unloading position are different. The unloading position can be referred to Figure 1 The area shown in U. A plurality of loading positions may be located in the die casting workshop, and a plurality of lowering positions may be located in the welding workshop.

[0074] The aerial track assembly 10 includes a plurality of tracks. When the transport bearing assembly 20 moves on the aerial track assembly 10, the direction of travel can be referred to Figure 1 The direction of the arrows on each track is shown. Each track has an inflow end and an outflow end. The inflow end of the track is the end along the direction of travel of the conveyor carrier assembly 20 where the conveyor carrier assembly 20 flows into the track. The outflow end of the track is the end along the direction of travel of the conveyor carrier assembly 20 where the conveyor carrier assembly 20 flows out of the track.

[0075] Reference Figure 6 The conveying and carrying assembly 20 may include a conveying trolley 21 and a carrying sling 22. The conveying trolley 21 is used to travel on the aerial track assembly 10, and the carrying sling 22 is used to carry workpieces. The conveying and carrying assembly 20 located at the loading position is an empty conveying and carrying assembly 20, that is, a conveying and carrying assembly 20 that does not carry a workpiece. As an example, a liftable loading position track 11 is provided at the loading position, and the inflow end of the dedicated conveying track 12 extends to the outflow end of the loading position track 11. By raising and lowering the loading position track 11, the conveying trolley 21 and the carrying sling 22 are raised and lowered, thereby loading the workpiece on the ground. As another example, the inflow end of the dedicated conveying track 12 extends to the loading position and spans the entire loading position. At this time, the conveying and carrying assembly 20 may include a lifting mechanism, which is connected between the conveying trolley 21 and the carrying sling 22. The carrying sling 22 can be raised and lowered by raising and lowering the lifting mechanism, thereby loading the workpiece on the ground.

[0076] The multiple dedicated conveyor rails 12 each constitute a portion of the conveying path suitable for multiple different types of workpieces. That is, the dedicated conveyor rails 12 are used only for the conveyor assembly 20 carrying a specific type of workpiece. The common conveyor rail 131 is used for the conveyor assembly 20 carrying any workpiece and constitutes a common conveying path for all workpieces. The multiple undedicated conveyor rails 14 each constitute a portion of the conveying path suitable for multiple different types of workpieces. That is, the undedicated conveyor rails 14 are used only for the conveyor assembly 20 carrying a specific type of workpiece.

[0077] The switching assembly 30 includes a switching member, which can be a switch, and can be used to change the route of the conveyor assembly 20. When the workpiece is divided into a first workpiece and a second workpiece, each switching member has two states, and each switching member includes a straight track and a curved track. The outflow ends of multiple dedicated conveyor tracks 12 are combined into a common conveyor track 131 through the first switching member 31. The outflow end of the common conveyor track 131 is then divided into multiple dedicated conveyor tracks 14 through the second switching member 32.

[0078] It should be noted that, along the conveying direction, in the case where multiple tracks merge into one track, a switching element is provided at the confluence, and position detectors close to the switching element can be provided at multiple tracks before the confluence, and the switching element at the confluence is controlled based on the detection results of the position detectors. For example, the conveying system also includes a control module and multiple starting position detectors electrically connected to the control module, and the multiple starting position detectors are respectively provided at multiple starting dedicated conveying tracks 12 and close to the first switching element 31. The starting position detector is used to detect whether the conveying carrier assembly 20 passes through its position. If detected, a signal is sent to the control module, and the control module controls the first switching element 31 based on the signal so that the outflow end of the starting dedicated conveying track 12 corresponding to the starting position detector is connected to the inflow end of the common conveying track 131 through the first switching element 31, thereby allowing the conveying carrier assembly 20 to move from the starting dedicated conveying track 12 to the common conveying track 131. The control module may include a PLC (Programmable Logic Controller). The position detector may be a photoelectric sensor, a proximity switch, etc.

[0079] The control module is used to obtain the workpiece type of the workpiece being transported by the conveyor assembly 20 traveling on the common conveyor track 131 and to control the second switching element 32 based on the workpiece type. The conveyor assembly 20 includes a tag 221, which stores identification information of the workpiece currently being carried by the conveyor assembly 20. This identification information includes the workpiece type and vehicle type. The conveying system also includes a reader for reading the identification information stored in the tag 221. One of the readers is installed on the common conveyor track 131, near the second switching element 32. The reader is electrically connected to the control module. When the conveying and carrying component 20 travels on the common conveying track 131 and passes the position of the reader, the reader reads the identification information stored in the carrier 221 and sends the identification information to the control module. The control module uses the workpiece type in the identification information as the workpiece type of the workpiece conveyed by the conveying and carrying component 20 traveling on the common conveying track 131, and controls the second switching component 32 according to the workpiece type, so that the outflow end of the common conveying track 131 is connected with the input end of the last dedicated conveying track 14 corresponding to the workpiece type through the second switching component 32, thereby allowing the conveying and carrying component 20 to travel from the common conveying track 131 to the last dedicated conveying track 14.

[0080] The conveying and carrying assembly 20 located at the unloading position is a conveying and carrying assembly 20 that carries the workpiece. As an example, a liftable unloading position track 15 is provided at the unloading position, and the outflow end of the last dedicated conveying track 14 extends to the inflow end of the unloading position track 15. By raising and lowering the unloading position track 15, the conveying trolley 21 and the carrying sling 22 are raised and lowered, thereby unloading the workpiece on the ground. As another example, the inflow end of the outflow end of the last dedicated conveying track 14 extends to the unloading position and spans the entire unloading position. In this case, the conveying and carrying assembly 20 may include a lifting mechanism, which is connected between the conveying trolley 21 and the carrying sling 22. The carrying sling 22 can be raised and lowered by raising and lowering the lifting mechanism, thereby unloading the workpiece on the ground.

[0081] In the related art, the one-piece die-casting parts are generally transported to the welding workshop by ground transportation. This transportation method has a small packing volume and a high transportation frequency, which can easily cause abnormally busy ground logistics. The logistics buffer occupies a large area and requires multiple logistics personnel for transportation.

[0082] In this embodiment of the present invention, this rail system can automatically and accurately and efficiently transport different types of workpieces from different loading locations to different unloading locations, without occupying ground logistics or space. In this embodiment, different types of workpieces share the same conveyor support assembly 20, and at least the common conveyor track 131 in the overhead rail assembly 10 is a shared track. This simplifies the conveyor system structure, reduces the space occupied by the conveyor system, and reduces fixed investment costs. Furthermore, this conveyor system offers high conveying speeds and efficiency.

[0083] In some embodiments, reference Figure 1 The aerial track assembly 10 also includes a plurality of lower-position tracks 15 respectively located at a plurality of lower-position tracks. Each end-dedicated conveying track 14 includes a connecting section 141 and an output section 142. The inflow end of the connecting section 141 is used to connect with the outflow end of the common conveying track 131, and the outflow end of the output section 142 is used to connect with the lower-position track 15; the aerial track assembly 10 also includes a plurality of temporary storage tracks 16 respectively used to be connected with the plurality of connecting sections 141. The switching assembly 30 also includes an output switching member 391. The output switching member 391 has a first state and a second state. The outflow end of the connecting section 141 is connected with the inflow end of the output section 142 through the output switching member 391 in the first state, and is connected with the inflow end of the temporary storage track 16 through the output switching member 391 in the second state.

[0084] The outflow end of the last dedicated conveyor track 14 extends to a loading track 15 in the unloading position. The loading track 15 can be raised or lowered. Alternatively, the loading track 15 can be non-raised. In this case, the conveyor support assembly 20 can include a lifting mechanism connected between the conveyor trolley 21 and the load-bearing sling 22. The lifting mechanism can be raised or lowered to raise or lower the load-bearing sling 22, thereby unloading the components from the ground.

[0085] The control module is used to obtain the vehicle model of the workpiece transported by the conveying support assembly 20 traveling on the connecting section 141, and obtain the current vehicle model to be assembled, and determine whether the vehicle model is consistent with the current vehicle model to be assembled. If the vehicle model is consistent with the current vehicle model to be assembled, the output switching component 391 is controlled to operate in the first state; if the vehicle model is inconsistent with the current vehicle model to be assembled, the output switching component 391 is controlled to operate in the second state.

[0086] The model of a workpiece refers to the model of the vehicle to which the workpiece belongs. When multiple models are produced on the same line, the models of the same type of workpieces may be different. For example, when the workpieces are divided into a first workpiece and a second workpiece, some of the first workpieces belong to the first model, and some of the second workpieces belong to the second model. One of the readers is installed on the connecting section 141 and is close to the output switching member 391. The reader is electrically connected to the control module. When the conveyor carrier assembly 20 travels on the connecting section 141 and passes the location of the reader, the reader reads the identification information stored in the code carrier 221 and sends the identification information to the control module. The control module uses the model in the identification information as the model of the workpiece being transported by the conveyor carrier assembly 20 traveling on the connecting section 141.

[0087] The workpiece is used to assemble with the mating component, which may be a vehicle body. For example, the first workpiece and the second workpiece are both used to assemble with the vehicle body. When multiple vehicle models are produced on the same line, the vehicle models to which the vehicle bodies belong are divided into multiple types. During assembly, the mating component and the workpiece need to be placed in an assembly fixture, and the assembly fixture is different for different vehicle models. Before the workpiece is unloaded, the assembly fixture has been pre-switched into position, and the vehicle model to which the mating component to be placed in the assembly fixture belongs can be used as the current vehicle model to be assembled. The control module is used to communicate with the ground control module, and the ground control module is used to read the information of the mating component through a reading module provided on the conveying path of the mating component, and determine the mating component to be placed in the assembly fixture, and send the vehicle model to which the mating component belongs to to the control module. The control module uses the received vehicle model of the mating component as the current vehicle model to be assembled.

[0088] When the vehicle model matches the vehicle model currently being assembled, the output switching member 391 operates in the first state. At this point, the outflow end of the connecting section 141 connects with the inflow end of the output section 142 via the output switching member 391 in the first state, allowing the conveyor and carrier assembly 20 to travel from the connecting section 141 to the output section 142, and from there to the lower section track 15. When the vehicle model does not match the vehicle model currently being assembled, the output switching member 391 operates in the second state. At this point, the outflow end of the connecting section 141 connects with the inflow end of the temporary storage track 16 via the output switching member 391 in the second state, allowing the conveyor and carrier assembly 20 to travel from the connecting section 141 to the temporary storage track 16 and be temporarily stored there.

[0089] In the related art, manual intervention is required to handle the anomaly when the model of the workpiece being delivered is incorrect. In the embodiment of the present invention, if the conveyor support assembly 20 traveling on the connecting section 141 conveys a workpiece that is inconsistent with the model of the vehicle to be assembled, the conveyor support assembly 20 can be temporarily stored on the temporary storage track 16, eliminating the need for manual intervention to handle the anomaly, thereby achieving full automation of the conveying system.

[0090] In some embodiments, reference Figure 1 The connecting section 141 includes an access section 1411 and an outlet section 1412. The inflow end of the access section 1411 is used to connect with the outflow end of the common conveying track 131, and the outflow end of the outlet section 1412 is selectively connected with the output section 142 or the temporary storage track 16 through the output switching component 391; the aerial track assembly 10 also includes multiple return tracks 17, and the inflow ends of the multiple return tracks 17 are respectively used to connect with the outflow ends of the multiple temporary storage tracks 16. The switching assembly 30 also includes a return switching component 392, and the inflow end of the outlet section 1412 is selectively connected with the outflow end of the access section 1411 or the outflow end of the return track 17 through the return switching component 392.

[0091] Among them, the reader installed at the connecting section 141 is specifically installed at the connecting section 1412. The output switching member 391 and the return flow switching member 392 constitute the terminal switching group 39. The outflow end of the connecting section 1412 is connected to the inflow end of the output section 142 through the output switching member 391 in the first state, and is connected to the inflow end of the temporary storage track 16 through the output switching member 391 in the second state. The inflow end of the return track 17 can be directly connected to the outflow end of the temporary storage track 16, or it can be connected to the outflow end of the temporary storage track 16 through other tracks. The return flow switching member 392 has a first state and a second state. The inflow end of the connecting section 1412 is connected to the outflow end of the connecting section 1411 through the return flow switching member 392 in the first state, and is connected to the outflow end of the return track 17 through the return flow switching member 392 in the second state.

[0092] One reader is installed on the temporary storage track 16, at the temporary storage position of the conveyor carrier assembly 20. This reader is electrically connected to the control module. When the conveyor carrier assembly 20 is temporarily stored on the temporary storage track 16, the reader reads the identification information stored on the tag 221 and sends this identification information to the control module. The control module determines the workpiece type and vehicle model of the temporarily stored workpiece based on this identification information. The ground control module is used to determine the workpiece type and vehicle model of the workpiece currently to be loaded based on the production plan. The ground control module will send the workpiece type and vehicle model of the workpiece currently to be loaded to the control module in real time. When the conveyor carrier assembly 20 is temporarily stored on the temporary storage track 16, the control module compares the workpiece type and vehicle model of the temporarily stored workpiece with the workpiece type and vehicle model of the workpiece currently to be loaded to see if they are consistent. If they are consistent, a jump signal is fed back to the ground control module and the return flow switching element 392 is controlled to operate in the second state. At this time, the inflow end of the connection section 1412 is connected to the outflow end of the return track 17 through the return flow switching element 392 in the second state, and the conveyor carrier assembly 20 can travel from the temporary storage track 16 and the return track 17 to the connection section 1412 and finally to the output section 142. After receiving the jump signal, the ground control module will skip loading the current workpiece and continue loading the next workpiece to be loaded.

[0093] In an embodiment of the present invention, the conveying and carrying component 20 can also flow back from the temporary storage track 16 and the return track 17 to the last dedicated conveying track 14, and then can be re-conveyed to the next piece position, so that the workpiece carried by the conveying and carrying component 20 at the temporary storage track 16 can be reused without manual recovery.

[0094] In some embodiments, reference Figure 1 The aerial track assembly 10 also includes multiple starting dedicated return tracks 18, a common return track 132, multiple ending dedicated return tracks 19 and multiple upper piece position tracks 11 respectively located at multiple upper pieces. The starting dedicated return track 18, the common return track 132 and the ending dedicated return track 19 are all used to provide the empty conveying and carrying assembly 20 with movement; the switching assembly 30 also includes a third switching component 33 and a fourth switching component 34. The inflow ends of the multiple starting dedicated return tracks 18 are respectively used to connect with the outflow ends of the multiple lower piece position tracks 15. The inflow end of the common return track 132 is selectively connected with a starting dedicated return track 18 through the third switching component 33, and the outflow end is selectively connected with the inflow end of an ending dedicated return track 19 through the fourth switching component 34. The outflow ends of the multiple ending dedicated return tracks 19 are respectively used to connect with the inflow ends of the multiple upper piece position tracks 11.

[0095] The common return track 132 and the common conveyor track 131 form the common track 13. The outflow end of the dedicated return track 19 extends to the loading track 11 in the loading position. The loading track 11 can be raised or lowered. Alternatively, the loading track 11 can be non-raised. In this case, the conveyor support assembly 20 can include a lifting mechanism connected between the conveyor trolley 21 and the load-bearing sling 22. The lifting mechanism can be raised or lowered to raise or lower the load-bearing sling 22, thereby loading the loads on the ground.

[0096] The conveying system also includes a plurality of middle position detectors electrically connected to the control module. The plurality of middle position detectors are respectively arranged at a plurality of starting dedicated return rails 18 and close to the third switching member 33. The middle position detector is used to detect whether the empty conveying carrier assembly 20 passes through its position. If detected, a signal is sent to the control module. The control module controls the third switching member 33 based on the signal so that the outflow end of the starting dedicated return rail 18 corresponding to the middle position detector is connected with the inflow end of the common return rail 132 through the third switching member 33, thereby allowing the empty conveying carrier assembly 20 to travel from the starting dedicated return rail 18 to the common conveying rail 131.

[0097] The ground control module is used to determine the workpiece type and vehicle type of the workpiece currently to be loaded based on the production plan. The ground control module transmits this information to the control module in real time. The conveyor system also includes an end-position detector electrically connected to the control module. The end-position detector is located on the common return track 132 and near the fourth switching element 34. The end-position detector is used to detect whether an empty conveyor carrier assembly 20 has passed through its location. If detected, it sends a signal to the control module. Upon receiving this signal, the control module controls the fourth switching element 34 based on the workpiece type of the workpiece currently to be loaded, so that the outflow end of the common return track 132 connects with the inflow end of the last dedicated return track 19 corresponding to the workpiece type through the fourth switching element 34, thereby allowing the empty conveyor carrier assembly 20 to travel from the common return track 132 to the last dedicated return track 19. In this embodiment, the common return track 132 is shared, further simplifying the structure of the conveyor system and reducing the space occupied by the conveyor system.

[0098] In some embodiments, reference Figure 2 and Figure 3 The workpieces are divided into first workpieces and second workpieces of different types; multiple starting dedicated return rails 18 include a first starting dedicated return rail 181 and a second starting dedicated return rail 182, multiple ending dedicated return rails 19 include a first ending dedicated return rail 191 and a second ending dedicated return rail 192, multiple temporary storage rails 16 include a first temporary storage rail 161 and a second temporary storage rail 162, and multiple return rails 17 include a first return rail 171 and a second return rail 172.

[0099] Among them, the multiple loading positions include the first loading position and the second loading position. The first loading position can refer to Figure 3 The second upper position can be referred to as W1 shown in Figure 3 The multiple lowering positions include a first lowering position and a second lowering position. The first lowering position can refer to Figure 2 The second lower part position of U1 shown in FIG can be referred to as Figure 2 The first workpiece may be a rear floor integral die casting, and the second workpiece may be a cabin integral die casting.

[0100] The multiple upper piece position rails 11 include a first upper piece position rail 111 and a second upper piece position rail 112, and the multiple lower piece position rails 15 include a first lower piece position rail 151 and a second lower piece position rail 152. The distance between the first lower piece position rail 151 and the second lower piece position rail 152 is greater than the distance between the first upper piece position rail 111 and the second upper piece position rail 112.

[0101] The plurality of starting dedicated conveying tracks 12 include a first starting dedicated conveying track 121 and a second starting dedicated conveying track 122. The end dedicated conveying track 14 includes a first end dedicated conveying track 143 and a second end dedicated conveying track 144. The first end dedicated conveying track 143 includes a first incoming section 1431, a first outgoing section 1432, and a first outgoing section 1433. The second end dedicated conveying track 144 includes a second incoming section 1441, a second outgoing section 1442, and a second outgoing section 1443. The output switching element 391 is divided into a first output switching element 3911 and a second output switching element 3912. The return flow switching element 392 is divided into a first return flow switching element 3921 and a second return flow switching element 3922.

[0102] The first switching member 31 has a first state and a second state. The inflow end of the common conveying track 131 is connected with the outflow end of the first starting dedicated conveying track 121 through the first switching member 31 in the first state, and is connected with the outflow end of the second starting dedicated conveying track 122 through the first switching member 31 in the second state.

[0103] The multiple home position detectors include a first home position detector and a second home position detector, which are respectively located at the first home dedicated conveyor track 121 and the second home dedicated conveyor track 122, and are close to the first switching member 31. If the first home position detector detects that the conveyor carrier assembly 20 has passed through its location, it sends a signal to the control module. Based on the signal, the control module controls the first switching member 31 to operate in the first state, so that the outflow end of the first home dedicated conveyor track 121 is connected to the inflow end of the common conveyor track 131 through the first switching member 31 in the first state, thereby allowing the conveyor carrier assembly 20 to travel from the first home dedicated conveyor track 121 to the common conveyor track 131. Correspondingly, if the second home position detector detects that the conveyor carrier assembly 20 has passed through its location, it sends a signal to the control module. Based on the signal, the control module controls the first switching member 31 to operate in the second state.

[0104] The first workpiece is of the first type, and the second workpiece is of the second type. The second switching member 32 has a first state and a second state. The outflow end of the common conveying track 131 is connected to the inflow end of the first last dedicated conveying track 143 via the second switching member 32 in the first state, and is connected to the inflow end of the second last dedicated conveying track 144 via the second switching member 32 in the second state. The control module is further configured to obtain the workpiece type of the workpiece being conveyed by the conveying carrier assembly 20 traveling on the common conveying track 131. If the workpiece type is the first type, the second switching member 32 is controlled to operate in the first state; if the workpiece type is the second type, the second switching member 32 is controlled to operate in the second state. In some embodiments, the common return track 132 includes a first sub-track 1321, a second sub-track 1322 and a third sub-track 1323, the inflow end of the first sub-track 1321 is selectively connected to the outflow end of the first starting dedicated return track 181 or the second starting dedicated return track 182 through the third switching component 33, and the outflow end of the third sub-track 1323 is selectively connected to the inflow end of the first last dedicated return track 191 or the second last dedicated return track 192 through the fourth switching component 34; the switching component 30 also includes a fifth switching component 35 and a sixth switching component 36, the inflow end of the second sub-track 1322 is selectively connected to the outflow end of the first temporary storage track 161 or the first sub-track 1321 through the fifth switching component 35, and the outflow end of the second sub-track 1322 is selectively connected to the inflow end of the third sub-track 1323 or the first return track 171 through the sixth switching component 36.

[0105] The third switching member 33 has a first state and a second state. The inflow end of the first sub-track 1321 connects to the outflow end of the first start-dedicated return track 181 through the third switching member 33 in the first state, and connects to the outflow end of the second start-dedicated return track 182 through the third switching member 33 in the second state. The fourth switching member 34 has a first state and a second state. The outflow end of the third sub-track 1323 connects to the inflow end of the first end-dedicated return track 191 through the fourth switching member 34 in the first state, and connects to the inflow end of the second end-dedicated return track 192 through the fourth switching member 34 in the second state.

[0106] The fifth switching member 35 has a first state and a second state. The inflow end of the second sub-track 1322 is connected to the outflow end of the first sub-track 1321 through the fifth switching member 35 in the first state, and is connected to the outflow end of the first temporary storage track 161 through the fifth switching member 35 in the second state. The sixth switching member 36 has a first state and a second state. The outflow end of the second sub-track 1322 is connected to the inflow end of the third sub-track 1323 through the sixth switching member 36 in the first state, and is connected to the inflow end of the first return track 171 through the sixth switching member 36 in the second state. In this embodiment of the present invention, the first temporary storage track 161 is connected to the first return track 171 via the second sub-track 1322 of the common return track 132, which can further simplify the structure of the conveying system and reduce the space occupied by the conveying system.

[0107] In some embodiments, the second starting dedicated return track 182 includes a fourth sub-track 1821, a fifth sub-track 1822 and a sixth sub-track 1823, the inflow end of the fourth sub-track 1821 is connected to the outflow end of the second lower position track 152, and the outflow end of the sixth sub-track 1823 is used to connect with the inflow end of the common return track 132 through the third switching member 33; the switching assembly 30 also includes a seventh switching member 37 and an eighth switching member 38, the inflow end of the fifth sub-track 1822 is selectively connected with the outflow end of the second temporary storage track 162 or the fourth sub-track 1821 through the seventh switching member 37, and the outflow end of the fifth sub-track 1822 is selectively connected with the inflow end of the sixth sub-track 1823 or the second return track 172 through the eighth switching member 38.

[0108] The outflow end of the second starting dedicated return track 182 is also the outflow end of the sixth sub-track 1823. The seventh switching member 37 has a first state and a second state. The inflow end of the fifth sub-track 1822 is connected to the outflow end of the fourth sub-track 1821 through the seventh switching member 37 in the first state, and is connected to the outflow end of the second temporary storage track 162 through the seventh switching member 37 in the second state. The eighth switching member 38 has a first state and a second state. The outflow end of the fifth sub-track 1822 is connected to the inflow end of the sixth sub-track 1823 through the eighth switching member 38 in the first state, and is connected to the inflow end of the second return track 172 through the eighth switching member 38 in the second state. In this embodiment of the present invention, the second temporary storage track 162 is connected to the second return track 172 via the fifth sub-track 1822 of the second starting dedicated return track 182, which can further simplify the structure of the conveying system and reduce the space occupied by the conveying system.

[0109] In some embodiments, the second temporary storage track 162 includes a first temporary storage section and a second temporary storage section, the outflow end of the second temporary storage section is the outflow end of the second temporary storage track 162, and the inflow end of the first temporary storage section is the inflow end of the second temporary storage track 162. The aerial track assembly 10 also includes an entry and exit track, and the switching assembly also includes a ninth switching member, the ninth switching member having a first state and a second state, the outflow end of the first temporary storage section is connected to the inflow end of the second temporary storage section through the ninth switching member in the first state, and is connected to the inflow end of the entry and exit track through the ninth switching member in the second state. The entry and exit track is used to allow the transport and carrying assembly 20 to be maintained to flow out of the aerial track assembly 10, and the entry and exit track is also used to allow external transport and carrying assembly 20 to flow into the aerial track assembly 10.

[0110] In some embodiments, reference Figure 4 、 Figures 9 to 11 The conveying system also includes a plurality of loading elevators 40, which are connected to the corresponding loading position rails 11. The loading elevators 40 are used to drive the loading position rails 11 to rise and fall, and the conveying bearing assembly 20 located on the loading position rails 11 rises and falls with the rise and fall of the loading position rails 11; the loading position rails 11 have a high position state and a low position state. The outflow end of the loading position rail 11 in the high position state is connected with the inflow end of the starting dedicated conveying rail 12, and the inflow end of the loading position rail 11 in the high position state is connected with the outflow end of the end dedicated return rail.

[0111] The extension direction of the upper piece position rail 11 can refer to Figure 9 The direction indicated by the arrow D. The position of the upper track 11 in the high position state can be referred to Figure 10 The position shown in F1 in the figure is the position of the upper rail 11 in the low position. Figure 10 The position shown in F2.

[0112] Reference Figure 4 、 Figure 5 、 Figures 9 to 12 The loading elevator 40 may include a lifting assembly 41, a guide column 42, a lifting frame 43, a counterweight box 44, a mounting platform 45, a boom assembly 46, a stabilizing frame 47, a limit pin 48 and a straightening rail 49. The lifting frame 43 includes a balancing frame 431 and a lifting frame 432. The number of balancing frames 431 may be multiple, and multiple balancing frames 431 are arranged at intervals along the extension direction of the loading position rail 11. Multiple balancing frames 431 are connected to the loading position rail 11 together, and the connection method may be a bolt connection. The balancing frame 431 can be raised and lowered, and the loading position rail 11 is raised and lowered with the balancing frame 431. There are two lifting frames 432, and the two lifting frames 432 are respectively connected to both sides of the multiple balancing frames 431 along the first direction. The first direction is perpendicular to the extension direction of the loading position rail 11 and the height direction of the loading elevator 40. The first direction can refer to Figure 9 The arrow in E shows the direction.

[0113] The lifting assembly 41 is connected to the lifting frame 432 and is used to drive the lifting frame 432 to rise and fall. The lifting assembly 41 can be a belt-type lifting assembly. In this case, the lifting assembly 41 includes a driving mechanism 411, a driven mechanism 412, and a belt group 413. There are two belt groups 413, each of which includes multiple belts. The two belt groups 413 are respectively located on both sides of the upper part elevator 40 along the first direction, and the belts in the two belt groups 413 are respectively connected to the two lifting frames 432. The driving mechanism 411 includes a driving member and a driving pulley, and the driven mechanism 412 includes a driven pulley. The driving pulley is connected to the driving member and rotates with the rotation of the output shaft of the driving member. The driven pulley is in transmission connection with the driving pulley and rotates with the rotation of the driving pulley. The loading elevator 40 also includes a first and a second driven pulley. The belts in one belt set 413 are wound between the driving pulley and the first driven pulley, while the belts in the other belt set 413 are wound between the following driving pulley and the second driven pulley. When the driver operates, the driving pulley rotates, and the following pulleys rotate with the driving pulleys, thereby moving the belts in the belt sets 413 on both sides, thereby raising and lowering the two lifting frames 432. The driver may include two servo motors to provide power for the raising and lowering of the balance frame 431.

[0114] The guide posts 42 are used to provide guidance for the lifting frame 432. The lifting frame 432 rises and falls along the guide posts 42. There are four guide posts 42, which are distributed at the four corners of the loading elevator 40. The loading elevator 40 also includes two mounting platforms 45. Both mounting platforms 45 are connected to the top of the guide posts 42. The driving mechanism 411 and the driven mechanism 412 are respectively mounted on the two mounting platforms 45. The suspension rod assembly 46 is connected to the two mounting platforms 45. The suspension rod assembly 46 is used to connect to the primary beam of the workshop building, thereby suspending and fixing the loading elevator 40 to the primary beam of the workshop building.

[0115] Along the first direction, two guide columns 42 on the same side are connected by a connecting beam. Two stabilizing brackets 47 are provided, one attached to each connecting beam on either side. These brackets also serve to connect the second-floor platform. The lower ends of the guide columns 42 are suspended. The connecting beam and stabilizing brackets 47 secure the guide columns 42, ensuring their strength and rigidity.

[0116] A counterweight box 44 is connected to the lifting frame 43 to ensure the balance of the center of gravity of the transport load-carrying assembly 20. A stabilizing rail 49 is also connected to the lifting frame 43 to guide, balance, and limit the position of the load-carrying sling 22. A stop pin 48 is removably connected to the mounting platform 45. This stop pin is used when the loading lift 40 requires maintenance. During maintenance, it limits the servo motor, preventing it from rotating and thus protecting maintenance personnel.

[0117] In some embodiments, reference Figure 13 The conveying system also includes a positioning assembly 80, which includes a second cylinder 81, a guide rod 82, and a positioning member 83. The second cylinder 81 is connected to the starting dedicated conveying track 12 and / or the ending dedicated return track 19. The guide rod 82 is connected to the second cylinder 81. The positioning member 83 is connected to the upper piece position track 11. The positioning member 83 has a positioning hole. The second cylinder 81 is used to drive the guide rod 82 to extend and retract along the extension direction of the upper piece position track 11. When the upper piece position track 11 is in the high position, the guide rod 82 extends and extends into the positioning hole of the positioning member 83, thereby defining the position of the upper piece position track 11 in the high position.

[0118] In some embodiments, the conveying system also includes a plurality of lower piece elevators 60, which are connected to the corresponding lower piece position rails 15. The lower piece elevators 60 are used to drive the lower piece position rails 15 to rise and fall, and the conveying bearing assembly 20 located on the lower piece position rails 15 rises and falls with the rise and fall of the lower piece position rails 15; the lower piece position rails 15 have a high position state and a low position state, and the inflow end of the lower piece position rails 15 in the high position state is connected to the outflow end of the last dedicated conveying rail 14, and the outflow end of the lower piece position rails 15 in the high position state is connected to the inflow end of the first dedicated return rail 18. The structure of the lower piece elevator 60 is the same as that of the upper piece elevator 40, and will not be repeated here. In this embodiment, both the upper piece position rails 11 and the lower piece position rails 15 can be raised and lowered, which is convenient for loading and unloading pieces on the ground.

[0119] In some embodiments, reference Figure 6 、 Figure 8 and Figure 14 The conveying and carrying assembly 20 includes a conveying trolley 21 and a carrying sling 22. The conveying trolley 21 is used to travel on the aerial track assembly 10, and the carrying sling 22 is used to carry the workpiece; the upper piece position rail 11 and / or the lower piece position rail 15 is provided with a clamping assembly 50, and the clamping assembly 50 is used to clamp the conveying trolley 21 during the lifting process of the upper piece position rail 11 and / or the lower piece position rail 15.

[0120] The carrying sling 22 is connected to the conveying trolley 21. The conveying trolley 21 includes a clamping rod 214, and the clamping assembly 50 is specifically used to clamp the clamping rod 214 in the conveying trolley 21. The clamping assembly 50 includes a mounting bracket 51, a first cylinder 52, a cylindrical gear 53, a driving clamping arm 54, a driven gear 55 and a driven clamping arm 56. The first cylinder 52 is connected to the mounting bracket 51. The cylindrical gear 53 and the driven gear 55 are rotatably connected to the mounting bracket 51. The driven gear 55 is meshed with the cylindrical gear 53. The first cylinder 52 is transmission-connected to the cylindrical gear 53. The first cylinder 52 is used to drive the cylindrical gear 53 to rotate. The driving clamping arm 54 is connected to the cylindrical gear 53. The driven clamping arm 56 is connected to the driven gear 55. The driving clamping arm 54 and the driven clamping arm 56 are used together to clamp the clamping rod 214. When the first cylinder 52 is in operation, it drives the cylindrical gear 53 to rotate. The rotation of the cylindrical gear 53 drives the driven gear 55 to rotate in the opposite direction, thereby causing the driving clamping arm 54 and the driven clamping arm 56 to move toward or away from each other. In this embodiment, the upper and / or lower rails 11 and 15 can clamp the conveyor trolley 21 during the raising and lowering process, preventing the conveyor trolley 21 from rocking left and right during the raising and lowering process.

[0121] Reference Figure 15The transport vehicle 21 also includes a travel assembly 211, a rod assembly 212, a rear number plate 213, a clamping rod 214, a mating assembly 215, a column light 216, a detection assembly 217, a carbon brush mounting cover 218, and an electrical control box bracket 219. The travel assembly 211 includes a front travel assembly 2111, a secondary travel assembly 2112, and a rear travel assembly 2113. The travel assembly 211 is used to travel on the aerial track assembly 10. The rod assembly 212 includes a front striker 2121, a middle link 2122, a rear link 2123, and a rear link mounting seat 2124, which are connected in sequence.

[0122] The mating assembly 215 includes a lifting lug connector 2151 and a steel wire rope 2152, both of which are used to connect to the lifting lug 227 of the load-bearing sling 22. The detection assembly 217 includes a first detection member 2171 and a second detection member 2172. The first detection member 2171 is used to detect whether the transport trolley 21 has reached the upper track 11 or the lower track 15, and the second detection member 2172 is used to detect the distance between the transport trolley 21 and the previous transport trolley 21. If the distance is too close, the transport trolley 21 will be decelerated to prevent collision with the previous transport trolley 21. The carbon brush installation cover 218 includes a front carbon brush installation cover 2181 and a rear carbon brush installation cover 2182.

[0123] Reference Figure 16 The load-bearing sling 22 includes a tag carrier 221, an upper frame 222, a balance wheel assembly 223, a side guide assembly 224, a boom 225, a diagonal brace 226, a sling lug 227, and a support assembly 228. The tag carrier 221, the sling lug 227, the balance wheel assembly 223, and the side guide assembly 224 are all mounted on the upper frame 222. The boom 225 and the diagonal brace 226 are used to strengthen the load-bearing sling 22, providing it with greater strength and rigidity. The support assembly 228 is used to support a workpiece and includes a front support 2281, a rear support 2282, a front middle support 2283, and a rear middle support 2284. The load-bearing sling 22 also includes a locating pin used to position the workpiece.

[0124] Reference Figure 8 After the transport trolley 21 is connected to the load-bearing sling 22, the eye connector 2151 passes through the first hole on the sling eye 227 and is connected to the sling eye 227, and the wire rope 2152 passes through the second hole on the sling eye 227 and is connected to the sling eye 227 to prevent the load-bearing sling 22 from falling. Figure 5 When the transport trolley 21 moves with the transport trolley 21 to the upper piece position track 11 or the lower piece position track 15, the balancing wheel assembly 223 and the side guide assembly 224 in the carrying sling 22 cooperate with the straightening track 49 to guide, balance and limit the carrying sling 22 to ensure the accuracy of the position of the carrying sling 22.

[0125] In some embodiments, the conveying system also includes multiple loading devices 70, which are respectively used to load multiple different types of workpieces. The loading devices 70 are used to grab the workpieces and place the workpieces into the empty conveying carrier assembly 20 on the loading position track 11 in a low position.

[0126] The loading device 70 may be a loading robot. The ground control module is used to determine the current loading requirements based on the production plan and control the loading device 70 to load the workpiece. In this embodiment, the loading device 70 enables automatic loading of workpieces, thereby achieving fully automated workpiece transportation.

[0127] The workpiece is divided into a first workpiece and a second workpiece. When the first workpiece is an integrated die-casting of the rear floor and the second workpiece is an integrated die-casting of the cabin, the multiple loading devices 70 include a first loading device 71 and a second loading device 72. The first loading device 71 is used to load the integrated die-casting of the rear floor, and the second loading device 72 is used to load the integrated die-casting of the cabin.

[0128] In some embodiments, the conveying system further includes multiple unloading devices, each of which is used to unload multiple different types of workpieces. The unloading devices may be robots, unloading slides, etc. The unloading robots are used to grab workpieces from the conveyor support assembly 20 and place them in a predetermined location.

[0129] In some embodiments, the length of the common transport track 131 is greater than the length of at least one last dedicated transport track 14; the length of the common return track 132 is greater than the length of at least one first dedicated return track 18. Specifically, the length of the common transport track 131 is greater than the length of the first last dedicated transport track 143, and the length of the common return track 132 is greater than the first last dedicated return track 191 and greater than the second last dedicated return track 192. In this embodiment, the long lengths of the common transport track 131 and the common return track 132 maximize track sharing, further simplifying the structure of the transport system and reducing the space occupied by the transport system.

[0130] In some embodiments, reference Figure 7 and Figure 16 The conveying bearing assembly 20 includes a tag carrier 221, and the conveying system also includes a reader / writer 90. The reader / writer 90 is located at the loading position. The reader / writer 90 is used to write the identification information of the workpiece loaded at the loading position into the tag carrier 221. The identification information includes the workpiece type and the vehicle type to which it belongs; the conveying system also includes a reader, which is used to read the identification information stored in the tag carrier 221.

[0131] Specifically, the load-carrying sling 22 includes a tag carrier 221. The tag carrier 221 can be an RFID (Radio Frequency Identification) tag. The corresponding reader is an RFID reader, and the reader / writer 90 is an RFID reader / writer. The reader / writer 90 can be connected to the upper workpiece position track 11. Workpiece types can be categorized as first type, second type, etc., and vehicle models can be categorized as first model, second model, third model, etc.

[0132] The ground control module is used to determine the workpiece currently requiring loading based on the production plan and control the corresponding loading device 70 to load the workpiece. After completing the loading operation, the loading device 70 sends a feedback signal to the ground control module. Upon receiving the feedback signal, the ground control module sends a write signal to the control module. Upon receiving the write signal, the control module combines the previously received workpiece type and vehicle type to form identification information and sends this identification information to the reader / writer 90, which writes the identification information into the tag carrier 221. In this embodiment, the reader can read the workpiece type and vehicle type, thereby facilitating control of the second switching element based on the workpiece type and control of the output switching element 391 based on the vehicle type.

[0133] In some embodiments, the conveying system further includes a cleaner, which is located at the unloading position and is used to clear the identification information stored in the tag carrier 221 after unloading. The cleaner can be connected to the unloading position track 15.

[0134] As an example, a process of conveying a first workpiece and a second workpiece using the conveying system provided by an embodiment of the present invention includes:

[0135] S1, the transport trolley 21 carries an empty load-carrying spreader 22 on the third sub-track 1323 of the common return track 132 and approaches the fourth switching element 34. Before moving to the fourth switching element 34, the transport trolley 21 identifies the type of the workpiece to be loaded.

[0136] After S1, if the workpiece type to be loaded is the first type, S2 is executed to control the fourth switching member 34 to operate in the first state, and the transport trolley 21 with the empty load-bearing sling 22 passes through the fourth switching member 34 in the first state and the first end dedicated return track 191 to the first loading position track 111;

[0137] S3, clamping the conveying trolley 21 by the clamping assembly 50 at the first loading rail 111, and driving the first loading rail 111 to descend to the low position by the loading elevator 40;

[0138] S4, the first loading device 71 grabs the first workpiece and places it into the carrying sling 22;

[0139] S5, the first loading rail 111 is raised to a high position by the loading elevator 40, and then the clamping assembly 50 on the conveying trolley 21 is released, and the conveying trolley 21 continues to move with the carrying sling 22;

[0140] S6, the conveying trolley 21 carries the carrying hanger 22 through the first starting dedicated conveying track 121 and the first switching member 31 in the first state to the common conveying track 131, and gradually approaches the second switching member 32. Before moving to the second switching member 32, it is identified that the workpiece type conveyed on the common conveying track 131 is the first type. The conveying trolley 21 carries the carrying hanger 22 through the second switching member 32 in the first state, the first incoming section 1431, and the first reflux switching member 3921 in the first state to the first outgoing section 1432. Before moving to the first output switching member 3911, it is identified that the model of the workpiece conveyed on the first outgoing section 1432 belongs to, and it is determined whether the model belongs to the same as the current model to be assembled;

[0141] After S6, if the vehicle model is the same as the vehicle model to be assembled, S7 is executed. The first output switching member 3911 and the first output section 1433 are in the first state and move to the first unloading position track 151. The unloading elevator 60 drives the first unloading position track 151 downward. After unloading, the first unloading position track 151 is driven upward again.

[0142] S8, the transport trolley 21 carries the empty load-bearing spreader 22 through the first starting dedicated return track 181, the third switching member 33 in the first state, the first sub-track 1321, the fifth switching member 35 in the first state, the second sub-track 1322, and the sixth switching member 36 in the first state to the third sub-track 1323, completing one cycle;

[0143] After S6, if the vehicle model is different from the vehicle model to be assembled, S9 is executed to control the first output switching element 3911 to operate in the second state, and the transport trolley 21 carrying the carrying sling 22 passes through the first output switching element 3911 in the second state to the first temporary storage track 161;

[0144] After S1, if the workpiece type to be loaded is the second type, S10 is executed to control the fourth switching member 34 to operate in the second state, and the transport trolley 21 with the empty load-carrying spreader 22 passes through the fourth switching member 34 in the second state and the second end dedicated return track 192 to the second loading track 112;

[0145] S11, clamping the conveying trolley 21 by the clamping assembly 50 at the second loading rail 112, and driving the second loading rail 112 to a low position by the loading elevator 40;

[0146] S12, the second loading device 72 grabs the second workpiece and places it into the carrying sling 22;

[0147] S13, the second loading rail 112 is raised to a high position by the loading elevator 40, and then the clamping assembly 50 on the conveying trolley 21 is released, and the conveying trolley 21 continues to move with the carrying sling 22;

[0148] S14, the conveying trolley 21 carries the carrying hanger 22 through the second starting dedicated conveying track 122 and the first switching member 31 in the second state to the common conveying track 131, and gradually approaches the second switching member 32. Before moving to the second switching member 32, it is identified that the workpiece type conveyed on the common conveying track 131 is the second type. The conveying trolley 21 carries the carrying hanger 22 through the second switching member 32 in the second state, the second incoming section 1441, and the second reflux switching member 3922 in the first state to the second outgoing section 1442. Before moving to the second output switching member 3912, it is identified that the model of the workpiece conveyed on the second outgoing section 1442 belongs to, and it is determined whether the model belongs to the same as the current model to be assembled;

[0149] After S14, if the vehicle model is the same as the vehicle model to be assembled, S15 is executed, and the vehicle moves to the second unloading position track 152 through the second output switching member 3912 in the first state and the second output section 1443. The unloading elevator 60 drives the second unloading position track 152 to descend, and after unloading, the second unloading position track 152 is driven to ascend again.

[0150] S16: The transport trolley 21 carries the empty load-bearing spreader 22 through the fourth sub-track 1821, the seventh switching member 37 in the first state, the fifth sub-track 1822, the eighth switching member 38 in the first state, the sixth sub-track 1823, the third switching member 33 in the second state, the first sub-track 1321, the fifth switching member 35 in the first state, the second sub-track 1322, and the sixth switching member 36 in the first state, and moves to the third sub-track 1323, completing one cycle.

[0151] After S14, if the vehicle model is inconsistent with the current vehicle model to be assembled, S17 is executed to control the second output switching component 3912 to operate in the second state, and the conveying trolley 21 carries the carrying sling 22 through the second output switching component 3912 in the second state, the first temporary storage section of the second temporary storage track 162, and the ninth switching component in the first state to move to the second temporary storage section of the second temporary storage track 162.

[0152] In a second aspect, an embodiment of the present invention provides a method for controlling a conveying system, which is applied to the conveying system provided in the first aspect, and the method for controlling the conveying system is executed by an aerial module in the conveying system. Figure 17, the conveying system control method includes:

[0153] S101, obtaining the workpiece type of the workpiece transported by the transport carrying assembly traveling on the common transport track; S102, controlling the second switching member according to the workpiece type.

[0154] The conveyor assembly 20 includes a tag carrier 221, which stores identification information of the workpiece currently being carried by the conveyor assembly 20. The identification information includes the workpiece type and vehicle type. The conveying system also includes a reader for reading the identification information stored in the tag carrier 221. One of the readers is installed on the common conveyor track 131, near the second switching element 32. The reader is electrically connected to the control module. When the conveyor assembly 20 travels on the common conveyor track 131 and passes the reader, the reader reads the identification information stored in the tag carrier 221 and transmits the identification information to the control module. The control module uses the workpiece type in the identification information as the workpiece type of the workpiece being conveyed by the conveyor assembly 20 traveling on the common conveyor track 131. Based on the workpiece type, the control module controls the second switching element 32 to connect the outflow end of the common conveyor track 131 with the input end of the last dedicated conveyor track 14 corresponding to the workpiece type, thereby causing the conveyor assembly 20 to travel from the common conveyor track 131 to the last dedicated conveyor track 14.

[0155] The workpieces are divided into a first workpiece and a second workpiece. When the first workpiece is of the first type and the second workpiece is of the second type, controlling the second switching member based on the workpiece type includes: if the workpiece type is the first type, controlling the second switching member to operate in a first state; if the workpiece type is the second type, controlling the second switching member to operate in a second state. In this embodiment, the second switching member can be controlled based on the workpiece type, thereby automatically and accurately and efficiently transporting different types of workpieces from different loading locations to different unloading locations.

[0156] In some embodiments, reference Figure 18 S102, after controlling the second switching element according to the workpiece type, further comprising:

[0157] S103, obtaining the vehicle type of the workpiece being transported by the conveyor support assembly traveling on the connecting section, and obtaining the vehicle type currently to be assembled;

[0158] S104, determining whether the vehicle model is consistent with the current vehicle model to be assembled;

[0159] S105, if the vehicle model is consistent with the current vehicle model to be assembled, controlling the output switching element to operate in the first state;

[0160] S106: If the vehicle model is inconsistent with the current vehicle model to be assembled, the output switching element is controlled to operate in the second state.

[0161] The vehicle model of a workpiece refers to the vehicle model for which the workpiece is suitable. When multiple vehicle models are produced on the same production line, the vehicle models of the same type of workpieces may differ. For example, when the workpieces are divided into a first workpiece and a second workpiece, some of the first workpieces are suitable for the first vehicle model, while some of the second workpieces are suitable for the second vehicle model. One of the readers is installed on the connecting section 141, near the output switching element 391. The reader is electrically connected to the control module. When the conveyor carrier assembly 20 travels on the connecting section 141 and passes the location of the reader, the reader reads the identification information stored in the tag carrier 221 and sends the identification information to the control module. The control module uses the vehicle model in the identification information as the vehicle model of the workpiece being transported by the conveyor carrier assembly 20 traveling on the connecting section 141.

[0162] The workpiece is used to assemble with a matching component, and the matching component can be a vehicle body. For example, the first workpiece and the second workpiece are both used to assemble with the vehicle body. When multiple vehicle models are produced on the same line, the vehicle models to which the vehicle bodies belong are divided into multiple types. During assembly, the matching components and the workpiece need to be placed in an assembly fixture, and the assembly fixtures are different for different vehicle models. Before the workpiece is unloaded, the assembly fixture has been pre-switched into position, and the vehicle model to which the matching component to be placed in the assembly fixture belongs can be used as the current vehicle model to be assembled. The ground control module is used to read the information of the matching component through a reading module provided on the conveying path of the matching component, and determine the matching component to be placed in the assembly fixture, and send the vehicle model to which the matching component belongs to to the control module. The control module uses the received vehicle model of the matching component as the current vehicle model to be assembled.

[0163] When the vehicle model matches the vehicle model currently being assembled, the output switching member 391 operates in the first state. At this point, the outflow end of the connecting section 141 connects with the inflow end of the output section 142 via the output switching member 391 in the first state, allowing the conveyor and carrier assembly 20 to travel from the connecting section 141 to the output section 142, and from there to the lower section track 15. When the vehicle model does not match the vehicle model currently being assembled, the output switching member 391 operates in the second state. At this point, the outflow end of the connecting section 141 connects with the inflow end of the temporary storage track 16 via the output switching member 391 in the second state, allowing the conveyor and carrier assembly 20 to travel from the connecting section 141 to the temporary storage track 16 and be temporarily stored there.

[0164] In the related art, manual intervention is required to handle the anomaly when the model of the workpiece being delivered is incorrect. In the embodiment of the present invention, if the conveyor support assembly 20 traveling on the connecting section 141 conveys a workpiece that is inconsistent with the model of the vehicle to be assembled, the conveyor support assembly 20 can be temporarily stored on the temporary storage track 16, eliminating the need for manual intervention to handle the anomaly, thereby achieving full automation of the conveying system.

[0165] The above embodiments are only preferred embodiments for fully illustrating the present invention, and the protection scope of the present invention is not limited thereto. Any equivalent substitution or modification made by those skilled in the art based on the present invention is within the protection scope of the present invention.

Claims

1. A conveying system, characterized in that: The invention comprises an aerial track assembly (10), a conveying and carrying assembly (20) and a switching assembly (30), wherein the conveying and carrying assembly (20) is used to carry any one of a plurality of different types of workpieces and to travel on the aerial track assembly (10) to convey the workpieces; The aerial track assembly (10) comprises a plurality of start-dedicated conveying tracks (12), a common conveying track (131) and a plurality of end-dedicated conveying tracks (14), wherein the inflow ends of the plurality of start-dedicated conveying tracks (12) respectively extend to a plurality of loading positions, the common conveying track (131) is located between the outflow ends of the plurality of start-dedicated conveying tracks (12) and the inflow ends of the plurality of end-dedicated conveying tracks (14), and the outflow ends of the plurality of end-dedicated conveying tracks (14) respectively extend to a plurality of loading positions; The switching assembly (30) includes a first switching member (31) and a second switching member (32); the inflow end of the common conveying track (131) is selectively connected to the outflow end of one of the starting dedicated conveying tracks (12) through the first switching member (31); and the outflow end is selectively connected to the inflow end of one of the ending dedicated conveying tracks (14) through the second switching member (32).

2. The conveying system according to claim 1, characterized in that The aerial track assembly (10) further comprises a plurality of lower-position tracks (15) respectively located at the plurality of lower-position tracks, each of the end-dedicated conveying tracks (14) comprising a connecting section (141) and an output section (142), the inflow end of the connecting section (141) being used to connect with the outflow end of the common conveying track (131), and the outflow end of the output section (142) being used to connect with the lower-position track (15); The aerial track assembly (10) further comprises a plurality of temporary storage tracks (16) respectively used for connecting to the plurality of connecting sections (141). The switching assembly (30) further comprises an output switching member (391), wherein the output switching member (391) has a first state and a second state. The outflow end of the connecting section (141) is connected to the inflow end of the output section (142) through the output switching member (391) in the first state, and is connected to the inflow end of the temporary storage track (16) through the output switching member (391) in the second state.

3. The conveying system according to claim 2, characterized in that The connecting section (141) includes an incoming section (1411) and an outgoing section (1412), wherein the incoming end of the incoming section (1411) is used to connect with the outgoing end of the common conveying track (131), and the outgoing end of the outgoing section (1412) is selectively connected with the output section (142) or the temporary storage track (16) through the output switching member (391); The aerial track assembly (10) further comprises a plurality of return tracks (17), the inflow ends of the plurality of return tracks (17) being respectively used to connect with the outflow ends of the plurality of temporary storage tracks (16), and the switching assembly (30) further comprises a return switching member (392), the inflow end of the connection section (1412) being selectively connected with the outflow end of the connection section (1411) or the outflow end of the return track (17) through the return switching member (392).

4. The conveying system according to claim 3, characterized in that The aerial track assembly (10) further comprises a plurality of start-specific return tracks (18), a common return track (132), a plurality of end-specific return tracks (19), and a plurality of upper-position tracks (11) respectively located at a plurality of upper-position tracks, wherein the start-specific return tracks (18), the common return track (132), and the end-specific return track (19) are all used for the empty conveying and carrying assembly (20) to travel; The switching assembly (30) further includes a third switching member (33) and a fourth switching member (34), wherein the inflow ends of the plurality of the starting dedicated return tracks (18) are respectively used to connect with the outflow ends of the plurality of the lower piece position tracks (15), the inflow end of the common return track (132) is selectively connected with one of the starting dedicated return tracks (18) through the third switching member (33), and the outflow end is selectively connected with the inflow end of one of the last dedicated return tracks (19) through the fourth switching member (34), and the outflow ends of the plurality of the last dedicated return tracks (19) are respectively used to connect with the inflow ends of the plurality of the upper piece position tracks (11).

5. The conveying system according to claim 4, characterized in that The workpieces are divided into first and second workpieces of different types; The plurality of start-dedicated return tracks (18) include a first start-dedicated return track (181) and a second start-dedicated return track (182); the plurality of end-dedicated return tracks (19) include a first end-dedicated return track (191) and a second end-dedicated return track (192); the plurality of temporary storage tracks (16) include a first temporary storage track (161) and a second temporary storage track (162); and the plurality of return flow tracks (17) include a first return flow track (171) and a second return flow track (172).

6. The conveying system according to claim 5, characterized in that The common return track (132) includes a first sub-track (1321), a second sub-track (1322) and a third sub-track (1323); the inflow end of the first sub-track (1321) is selectively connected to the outflow end of the first start-dedicated return track (181) or the second start-dedicated return track (182) through the third switching member (33); the outflow end of the third sub-track (1323) is selectively connected to the inflow end of the first end-dedicated return track (191) or the second end-dedicated return track (192) through the fourth switching member (34); The switching assembly (30) further includes a fifth switching member (35) and a sixth switching member (36); the inflow end of the second sub-track (1322) is selectively connected to the outflow end of the first temporary storage track (161) or the first sub-track (1321) through the fifth switching member (35); and the outflow end of the second sub-track (1322) is selectively connected to the inflow end of the third sub-track (1323) or the first return track (171) through the sixth switching member (36).

7. The conveying system according to claim 5, characterized in that The plurality of lower piece position rails (15) include a first lower piece position rail (151) and a second lower piece position rail (152); the second start-specific return rail (182) includes a fourth sub-rail (1821), a fifth sub-rail (1822) and a sixth sub-rail (1823); the inflow end of the fourth sub-rail (1821) is connected to the outflow end of the second lower piece position rail (152); the outflow end of the sixth sub-rail (1823) is used to connect with the inflow end of the common return rail (132) through the third switching member (33); The switching assembly (30) further includes a seventh switching member (37) and an eighth switching member (38), wherein the inflow end of the fifth sub-track (1822) is selectively connected to the outflow end of the second temporary storage track (162) or the fourth sub-track (1821) via the seventh switching member (37), and the outflow end of the fifth sub-track (1822) is selectively connected to the inflow end of the sixth sub-track (1823) or the second return track (172) via the eighth switching member (38).

8. The conveying system according to any one of claims 4 to 7, characterized in that The conveying system further comprises a plurality of loading elevators (40), wherein the loading elevators (40) are connected to corresponding loading rails (11), and the loading elevators (40) are used to drive the loading rails (11) to rise and fall, and the conveying bearing assembly (20) located on the loading rails (11) rises and falls along with the rising and falling of the loading rails (11); The upper piece position track (11) has a high position state and a low position state, and the outflow end of the upper piece position track (11) in the high position state is connected with the inflow end of the starting dedicated conveying track (12); And / or, the conveying system further comprises a plurality of lower piece elevators (60), the lower piece elevators (60) being connected to the corresponding lower piece position rails (15), the lower piece elevators (60) being used to drive the lower piece position rails (15) to rise and fall, and the conveying bearing assembly (20) located on the lower piece position rails (15) to rise and fall along with the rise and fall of the lower piece position rails (15); The lower piece position track (15) has a high position state and a low position state, and the inflow end of the lower piece position track (15) in the high position state is connected with the outflow end of the last dedicated conveying track (14).

9. The conveying system according to claim 8, characterized in that The transport and carrying assembly (20) comprises a transport trolley (21) and a carrying sling (22), wherein the transport trolley (21) is used to travel on the aerial track assembly (10), and the carrying sling (22) is used to carry workpieces; The upper piece position rail (11) and / or the lower piece position rail (15) are provided with a clamping assembly (50), and the clamping assembly (50) is used to clamp the conveying trolley (21) during the lifting and lowering process of the upper piece position rail (11) and / or the lower piece position rail (15).

10. The conveying system according to claim 8, characterized in that The conveying system further comprises a plurality of loading devices (70), each of which is used for loading a plurality of different types of workpieces. The loading devices (70) are used to grab the workpieces and place the workpieces into an empty conveying carrier assembly (20) on a loading track (11) in a low position.

11. The conveying system according to any one of claims 4 to 7, characterized in that: The length of the common conveying track (131) is greater than the length of at least one of the non-dedicated conveying tracks (14); And / or, the length of the common return track (132) is greater than the length of at least one of the original dedicated return tracks (18).

12. The conveying system according to any one of claims 1 to 7, characterized in that The conveying and carrying component (20) includes a tag carrier (221), and the conveying system further includes a reader / writer (90), wherein the reader / writer (90) is located at the loading position, and the reader / writer (90) is used to write identification information of a workpiece loaded at the loading position into the tag carrier (221), wherein the identification information includes the type of the workpiece and the type of vehicle to which it belongs; The conveying system further comprises a reader, which is used to read the identification information stored in the tag carrier (221).

13. A method for controlling a conveying system, characterized in that: Applied to the conveying system according to any one of claims 1 to 12, the conveying system control method comprises: Acquiring a workpiece type of a workpiece conveyed by a conveyor carrying assembly traveling on a common conveyor track; The second switching element is controlled according to the workpiece type.

14. The method for controlling a conveying system according to claim 13, wherein: After controlling the second switching element according to the workpiece type, the method further includes: Obtain the vehicle model of the workpiece being transported by the conveyor support assembly traveling on the connecting section, and obtain the vehicle model currently to be assembled; Determining whether the vehicle model is consistent with the vehicle model to be assembled; If the vehicle type is consistent with the vehicle type to be assembled, the output switching element is controlled to operate in the first state; If the vehicle type is inconsistent with the current vehicle type to be assembled, the output switching element is controlled to operate in the second state.

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