Double-layer conveyor system

Abstract

The present invention discloses a double-layer conveying system, which relates to the technical field of material transfer, including a lower conveying line, a lifting assembly, a gluing device, an upper conveying line and a transfer trolley; the lower conveying line transports the target pallet from the pallet loading station to the pallet unloading station; the lifting assembly transports the target pallet at the pallet unloading station upward to the body loading station, and then transports the target pallet loaded with the target body in the body loading station upward to the gluing station; the gluing device glues the target body at the gluing station; the upper conveying line transports the target pallet that has been glued in the gluing station to the body unloading station; the transfer trolley docks with the pallet loading station and the body unloading station to put an empty target pallet into the pallet loading station and collect the target pallet at the body unloading station. This solution uses automated equipment to replace manual labor to perform corresponding operations in the automobile body-in-white spot welding process, which can reduce labor costs, speed up the action rhythm, and improve overall production efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of material transfer, and in particular to a double-layer conveying system. Background Art

[0002] In the spot welding process of the body in white (BW) of an automobile, some parts of the body in white need to be transported to other workstations for spot welding and fixing after being coated with shock-absorbing glue. To complete this operation, each body in white workpiece that has been coated with glue needs to be equipped with a pallet to load the body in white workpiece into the pallet for positioning, and the pallets are placed in order to prevent the body in white workpieces from scratching each other and causing the unsolidified glue layer to fall off. The pallets loaded with the body in white workpieces are then collected by a logistics trolley, and multiple pallets are transported in batches to the next workstation for spot welding and fixing.

[0003] In the prior art, the above operations often need to be completed manually, such as workers manually applying glue, manually placing pallets, and manually transferring pallets to logistics trolleys, etc. This results in high labor costs and slow action rhythm, making it difficult to improve overall production efficiency. Summary of the invention

[0004] The main purpose of the present invention is to propose a double-layer conveying system, which aims to reduce the labor cost of the spot welding process of the automobile body in white, speed up the action rhythm, and improve the overall production efficiency.

[0005] To achieve the above object, the double-layer conveying system proposed by the present invention comprises:

[0006] A lower conveyor line, wherein the lower conveyor line is used to sequentially convey a plurality of target pallets from a pallet loading station to a pallet unloading station;

[0007] A lifting assembly, the bottom of which is connected to the output end of the lower conveyor line; the lifting assembly is used to convey the target pallet of the pallet unloading station upward to the body loading station, and the lifting assembly is used to convey the target pallet loaded with the target body in the body loading station upward to the gluing station;

[0008] A gluing device, the gluing device is connected to the middle part of the lifting assembly; the gluing device is used to apply glue to the target vehicle body at the gluing station;

[0009] An upper conveyor line, the input end of which is butted against the top of the lifting assembly; the upper conveyor line is used to convey the target pallet carrying the target vehicle body in the gluing station to the vehicle body unloading station;

[0010] A transfer trolley is connected to the input end of the lower conveyor line and the output end of the upper conveyor line. The transfer trolley is used to deliver the empty target pallet to the pallet loading station, and the transfer trolley is used to receive the target pallet carrying the target body in the body unloading station.

[0011] In one embodiment, the lifting assembly includes a fixed bracket, a lifting platform, a lifting drive device and a booster conveyor line; the pallet unloading station, the body loading station, and the gluing station are arranged on the fixed bracket from bottom to top, and the lifting platform is slidably connected to the fixed bracket along the up and down directions. The lifting drive device is used to drive the lifting platform to move between the pallet unloading station, the body loading station, and the gluing station;

[0012] The booster conveyor line is arranged on the lifting platform; when the lifting platform is located at the pallet unloading station, the booster conveyor line is docked with the lower conveyor line, and the booster conveyor line is used to pull the target pallet of the lower conveyor line into the lifting platform; when the lifting platform is located at the gluing station, the booster conveyor line is docked with the upper conveyor line, and the booster conveyor line is used to push the target pallet of the lifting platform into the upper conveyor line.

[0013] In one embodiment, the lifting assembly further comprises an in-position sensor device, a clamping drive device and a limiter, wherein the in-position sensor device and the clamping drive device are arranged on the lifting platform, the in-position sensor device is electrically connected to the clamping drive device, and the limiter is connected to the clamping drive device;

[0014] When the lifting platform is located at the pallet unloading station, the in-place sensor device is used to send an in-place signal to the clamping drive device after detecting that the target pallet enters the lifting platform; the clamping drive device is used to drive the limit member to abut against the target pallet when receiving the in-place signal, so as to fix the target pallet on the lifting platform.

[0015] In one embodiment, the lifting assembly further includes a vehicle type detection device and a prompting device; the vehicle type detection device is arranged on the lifting platform, the vehicle type detection device is electrically connected to the gluing device, the lifting drive device, and the prompting device, and the gluing device pre-stores parameters of the pallet to be glued;

[0016] When the lifting platform is located at the loading station on the vehicle body, the vehicle type detection device is used to obtain the parameters of the target pallet and compare them with the parameters of the pallet to be glued to obtain a comparison result; the vehicle type detection device is used to send a first signal to the lifting drive device when the comparison result is compatible, so as to trigger the lifting drive device to drive the lifting platform to move upward to the gluing station; the vehicle type detection device is used to send a second signal to the prompt device when the comparison result is incompatible, so as to trigger the prompt device to perform an error alarm operation.

[0017] In one embodiment, the double-layer conveying system also includes a first material blocking drive assembly, which is arranged at the input end of the upper conveying line, and the first material blocking drive assembly is used to block the target pallet of the gluing station from entering the upper conveying line from the lifting platform in an extended state.

[0018] In one embodiment, the double-layer conveying system also includes a second material blocking drive assembly, which is arranged at the output end of the upper conveying line, and the second material blocking drive assembly is used to block the target pallet of the body unloading station from entering the transfer trolley from the upper conveying line when in an extended state.

[0019] In one embodiment, the double-layer conveying system also includes a third material blocking drive assembly, which is arranged at the output end of the lower conveying line, and the third material blocking drive assembly is used to block the target pallet of the pallet unloading station from entering the lifting platform from the lower conveying line in an extended state.

[0020] In one embodiment, the double-layer conveying system also includes a fourth material blocking drive assembly, which is arranged in the middle of the lower conveying line, and the fourth material blocking drive assembly is used to block the target pallet located in the middle of the lower conveying line from entering the pallet unloading station in an extended state.

[0021] In one embodiment, the double-layer conveying system also includes a counting device, which is electrically connected to the first material stop drive assembly; the counting device is used to obtain the first number of the target pallets of the upper conveying line, and the counting device is used to send a first blocking signal to the first material stop drive assembly when the first number reaches a first preset value to drive the first material stop drive assembly to extend.

[0022] In one embodiment, the fourth material blocking drive assembly is electrically connected to the third material blocking drive assembly and the booster conveyor line; the third material blocking drive assembly is used to send a second blocking signal to the fourth material blocking drive assembly when switching from an extended state to a retracted state, and the booster conveyor line is used to send a third blocking signal to the fourth material blocking drive assembly when starting, and the fourth material blocking drive assembly is used to extend upon receiving the second blocking signal and the third blocking signal.

[0023] In one embodiment, the double-layer conveying system further includes a transition roller and a damping structure, wherein the transition roller is arranged between the gluing station and the input end of the upper conveying line, and the transition roller rotates around a horizontal axis; the damping structure is used to abut against the transition roller to hinder the rotation of the transition roller;

[0024] When the lifting platform is located at the gluing station, the booster conveyor line is used to push the target tray of the lifting platform to enter the upper conveyor line after passing through the transition roller.

[0025] In one embodiment, the damping structure includes a fixed seat, a connecting seat, an elastic telescopic member and an elastic damping member; the fixed seat is connected to the input end of the upper conveying line, the lower end of the elastic telescopic member is connected to the fixed seat, the upper end of the elastic telescopic member is connected to the connecting seat, the transition roller is rotatably connected to the connecting seat around a horizontal axis, the lower end of the elastic damping member is arranged on the fixed seat, and the upper end of the elastic damping member abuts against the transition roller;

[0026] The transition roller is used to overcome the elastic force of the elastic telescopic member and move downward under the gravity of the target pallet; the elastic damping member is used to be compressed downward under the pressing force of the transition roller to apply a gradually increasing damping force in the reverse direction to the transition roller during the compression process.

[0027] The technical solution of the present invention cooperates with the lower conveyor line, the lifting component and the upper conveyor line through the transfer trolley. The lower conveyor line can automatically convey the empty target pallet dropped by the transfer trolley from the pallet loading station to the pallet unloading station. The lifting component can automatically convey the target pallet at the pallet unloading station upward to the body loading station and the gluing station, so as to load the target body into the target pallet, and automatically perform gluing operation on the target body loaded into the target pallet through the gluing device. Then, the upper conveyor line can automatically convey the target pallet that has completed the gluing operation at the gluing station to the body unloading station, so that the transfer trolley can collect it and transfer it to the welding station for spot welding and fixing operation. Some operations in the above process are replaced by automated equipment instead of manual operation, which can reduce the labor cost of the spot welding process of the automobile body in white, speed up the action rhythm, improve the continuity of action connection, and thus improve the overall production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0029] Figure 1 A schematic diagram of the overall structure of an embodiment of a double-layer conveying system provided by the present invention;

[0030] Figure 2 A schematic diagram of the partial structure of an embodiment of a double-layer conveying system provided by the present invention;

[0031] Figure 3 A schematic diagram of the partial structure of a lifting assembly in an embodiment of a double-layer conveying system provided by the present invention;

[0032] Figure 4 A schematic diagram of the connection structure between the lifting platform and the upper conveying line in one embodiment of the double-layer conveying system provided by the present invention.

[0033] Description of Figure Numbers:

[0034] 100, target pallet; 200, target vehicle body;

[0035] 1. Lower conveyor line;

[0036] 2. Lifting assembly; 21. Fixed bracket; 22. Lifting platform; 23. Lifting drive device; 24. Boosting conveyor line; 25. In-position sensor device; 26. Clamping drive device; 27. Limiting piece; 28. Vehicle type detection device;

[0037] 3. Gluing device; 4. Upper conveying line; 5. First material stopper driving assembly; 6. Second material stopper driving assembly; 7. Third material stopper driving assembly; 8. Fourth material stopper driving assembly; 9. Transition roller;

[0038] 10. Damping structure; 101. Fixing seat; 102. Connecting seat; 103. Elastic telescopic member; 104. Elastic damping member.

[0039] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0040] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0041] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0042] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of the features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0043] In the spot welding process of the body in white (BW) of an automobile, some parts of the body in white need to be transported to other workstations for spot welding and fixing after being coated with shock-absorbing glue. To complete this operation, each body in white workpiece that has been coated with glue needs to be equipped with a pallet to load the body in white workpiece into the pallet for positioning, and the pallets are placed in order to prevent the body in white workpieces from scratching each other and causing the unsolidified glue layer to fall off. The pallets loaded with the body in white workpieces are then collected by a logistics trolley, and multiple pallets are transported in batches to the next workstation for spot welding and fixing.

[0044] In the prior art, the above operations often need to be completed manually, such as workers manually applying glue, manually placing pallets, and manually transferring pallets to logistics trolleys, etc. This results in high labor costs and slow action rhythm, making it difficult to improve overall production efficiency.

[0045] In order to solve the above problems, an embodiment of the present invention provides a double-layer conveying system, which uses automated equipment to replace manual labor to perform corresponding operations in the automobile body-in-white spot welding process, so as to reduce the labor cost of the process, speed up the action rhythm, and improve the overall production efficiency.

[0046] See also Figures 1 to 3 The double-layer conveying system provided by the embodiment of the present invention includes:

[0047] The lower conveyor line 1 is used to sequentially convey a plurality of target pallets 100 from the pallet loading station to the pallet unloading station;

[0048] The lifting assembly 2, the bottom of which is connected to the output end of the lower conveyor line 1; the lifting assembly 2 is used to convey the target pallet 100 of the pallet unloading station upward to the body loading station, and the lifting assembly 2 is used to convey the target pallet 100 loaded with the target body 200 in the body loading station upward to the gluing station;

[0049] The gluing device 3 is connected to the middle of the lifting assembly 2; the gluing device 3 is used to apply glue to the target vehicle body 200 at the gluing station;

[0050] The upper conveyor line 4, the input end of which is connected to the top of the lifting assembly 2; the upper conveyor line 4 is used to convey the target tray 100 carrying the target car body 200 in the gluing station to the car body unloading station;

[0051] A transfer trolley (not shown in the figure) is connected to the input end of the lower conveyor line 1 and the output end of the upper conveyor line 4. The transfer trolley is used to deliver an empty target pallet 100 to the pallet loading station, and the transfer trolley is used to receive the target pallet 100 carrying the target vehicle body 200 in the vehicle body unloading station.

[0052] In this embodiment, the lower conveyor line 1 can adopt a roller conveyor or a belt conveyor. The input end of the lower conveyor line 1 is located at the pallet loading station, and the output end of the lower conveyor line 1 is located at the pallet unloading station. The lower conveyor line 1 is in a continuous operation state, so that the empty target pallets 100 placed by the transplanting trolley at the pallet loading station can be continuously transported to the pallet unloading station in turn.

[0053] The lifting assembly 2 can be lifted by electric drive, hydraulic drive, pneumatic drive, etc. to transport the empty target pallet 100 in the pallet unloading station on the bottom layer upward to the body loading station on the middle layer. Preferably, the lifting assembly 2 transports one target pallet 100 at a time; after the empty target pallet 100 is transported to the body loading station, the target body 200 can be placed on the target pallet 100 by manual loading or with the help of a loading device such as a robotic arm, and the positioning fixture on the target pallet 100 can be used to realize the positioning of the target body 200. The target body 200 is relatively fixed with the target pallet 100; when the target body 200 is fixed on the target pallet 100, the lifting assembly 2 can continue to transport the target pallet 100 carrying the target body 200 upward to the upper gluing station; when the target pallet 100 carrying the target body 200 is transported to the gluing station, the gluing device 3 can apply shock-absorbing glue to the target body 200 in the target pallet 100, wherein the gluing device 3 may include a glue gun and a driving device such as a robotic arm for driving the glue gun to perform gluing operations.

[0054] The upper conveyor line 4 is located above the lower conveyor line 1. The upper conveyor line 4 can be a roller conveyor or a belt conveyor. The input end of the upper conveyor line 4 is located at the gluing station, and the output end of the upper conveyor line 4 is located at the body unloading station. The upper conveyor line 4 is in a continuous operation state, so that the target pallet 100 that has completed the gluing operation in the gluing station can be continuously transported to the body unloading station in sequence. Among them, after the target pallet 100 that has completed the gluing operation in the gluing station enters the upper conveyor line 4, the lifting component 2 can be lowered from the gluing station to the pallet unloading station to repeat the above operation, and continue to transport the next empty target pallet 100 that has been transported to the pallet unloading station through the lower conveyor line 1 upward to the body loading station and the gluing station, and so on.

[0055] The transfer trolley is provided with an upper placement table and a lower placement table. When the target pallets 100 of the upper conveyor line 4 increase to a certain number and / or the target pallets 100 of the lower conveyor line 1 decrease to a certain number, the transfer trolley can be docked with the pallet loading station and the body unloading station, that is, the upper placement table of the transfer trolley is docked with the output end of the upper conveyor line 4, and the lower placement table of the transfer trolley is docked with the input end of the lower conveyor line 1; in this way, the upper conveyor line 4 can be driven to carry the glue-coated materials. The target pallet 100 of the completed target vehicle body 200 enters the upper placement table to complete the collection operation of the target pallet 100; at the same time, through the drive of the lower conveyor line 1, the empty target pallet 100 on the lower placement table can be driven to enter the lower conveyor line 1 to complete the delivery operation of the target pallet 100; after completing the above-mentioned collection operation and delivery operation, the transfer trolley can transfer the target pallet 100 carrying the target vehicle body 200 to the welding station to perform spot welding and fixing operations on the target vehicle body 200 that has been glued. It can be understood that the above-mentioned empty target pallet 100 dropped from the lower placement table of the transfer trolley to the lower conveyor line 1 is the target pallet 100 recovered by the transfer trolley after the welding station has completed unloading (that is, after the glued target vehicle body 200 is taken out from the target pallet 100). Based on the coordination between the transfer trolley and the lower conveyor line 1, the lifting assembly 2, and the upper conveyor line 4, the above-mentioned operations such as the target pallet 100 placement, the lower target pallet 100 conveying, the target body 200 loading, the target body 200 gluing, the upper target pallet 100 conveying, and the target pallet 100 collection can be performed cyclically.

[0056] It can be seen that the double-layer conveying system provided in this embodiment cooperates with the transfer trolley and the lower conveyor line 1, the lifting component 2, and the upper conveyor line 4. The lower conveyor line 1 can automatically convey the empty target pallet 100 dropped by the transfer trolley from the pallet loading station to the pallet unloading station, and the lifting component 2 can automatically convey the target pallet 100 at the pallet unloading station upward to the body loading station and the gluing station, so as to load the target body 200 into the target pallet 100, and automatically perform the gluing operation on the target body 200 loaded into the target pallet 100 through the gluing device 3, and then the upper conveyor line 4 can automatically convey the target pallet 100 that has completed the gluing operation at the gluing station to the body unloading station, so that the transfer trolley can collect it and transfer it to the welding station for spot welding and fixing operation; part of the operations in the above process are replaced by automated equipment instead of manual operations, which can reduce the labor cost of the spot welding process of the automobile body in white, and can speed up the action rhythm and improve the continuity of action connection, thereby improving the overall production efficiency.

[0057] In one embodiment, reference Figures 1 to 3The lifting assembly 2 includes a fixed bracket 21, a lifting platform 22, a lifting drive device 23 and a booster conveyor line 24; the pallet unloading station, the body loading station, and the gluing station are arranged on the fixed bracket 21 from bottom to top, and the lifting platform 22 is slidably connected to the fixed bracket 21 along the up and down directions. The lifting drive device 23 is used to drive the lifting platform 22 to move between the pallet unloading station, the body loading station, and the gluing station;

[0058] The booster conveyor line 24 is arranged on the lifting platform 22; when the lifting platform 22 is located at the pallet unloading station, the booster conveyor line 24 is docked with the lower conveyor line 1, and the booster conveyor line 24 is used to pull the target pallet 100 of the lower conveyor line 1 into the lifting platform 22; when the lifting platform 22 is located at the gluing station, the booster conveyor line 24 is docked with the upper conveyor line 4, and the booster conveyor line 24 is used to push the target pallet 100 of the lifting platform 22 into the upper conveyor line 4.

[0059] Specifically, the lifting drive device 23 can drive the lifting platform 22 to move up and down relative to the fixed bracket 21 by electric drive, hydraulic drive, pneumatic drive, etc., so that the empty target pallet 100 transported from the lower conveyor line 1 to the pallet unloading station is transported upward to the middle-level body loading station and the upper-level gluing station in sequence through the lifting platform 22, and after the target pallet 100 that completes the gluing operation enters the upper conveyor line 4, the lifting platform 22 is driven to return to the lower-level pallet unloading station to repeat the above-mentioned lifting and conveying operation.

[0060] The booster conveyor line 24 can adopt a roller conveyor or a belt conveyor. The booster conveyor line 24 can realize forward conveying and reverse conveying by switching the driving direction. The conveying direction of the booster conveyor line 24 in the forward conveying state is consistent with the conveying direction of the lower conveyor line 1, and the conveying direction of the booster conveyor line 24 in the reverse conveying state is consistent with the conveying direction of the upper conveyor line 4. Based on the above settings, when the lifting platform 22 performs a lifting operation, the booster conveyor line 24 is in a stopped state; when the lifting platform 22 is located at the pallet unloading station and needs to transfer the empty target pallet 100 on the lower conveyor line 1 to the lifting platform 22, the booster conveyor line 24 starts and enters a forward conveying state to cooperate with the continuously running lower conveyor line 1 to complete the transfer of the target pallet 100, so that the empty target pallet 100 can be smoothly transferred from the lower conveyor line 1 to the lifting platform 22 under the driving force continuously applied from the outside; when the lifting platform 22 is located at the gluing station and needs to transfer the target pallet 100 that has completed the gluing operation on the lifting platform 22 to the upper conveyor line 4, the booster conveyor line 24 starts and enters a reverse conveying state to cooperate with the continuously running upper conveyor line 4 to complete the transfer of the target pallet 100, so that the target pallet 100 carrying the target vehicle body 200 can be smoothly transferred from the lifting platform 22 to the upper conveyor line 4 under the driving force continuously applied from the outside.

[0061] In this embodiment, by setting a booster conveyor line 24, the power connection between the lifting platform 22 and the lower conveyor line 1 and the upper conveyor line 4 can be achieved, ensuring that the target pallet 100 can be smoothly transferred between the lower conveyor line 1 and the lifting platform 22, and between the lifting platform 22 and the upper conveyor line 4 under the action of continuous external driving force. This can avoid the problem of the target pallet 100 being stuck due to lack of power on the lifting platform 22 during the process of entering the lifting platform 22 from the lower conveyor line 1, and can avoid the problem of the target pallet 100 being difficult to smoothly enter the upper conveyor line 4 from the lifting platform 22 due to lack of power on the lifting platform 22.

[0062] In one embodiment, reference Figures 1 to 3 The lifting assembly 2 further includes a position sensing device 25, a clamping drive device 26 and a stopper 27. The position sensing device 25 and the clamping drive device 26 are arranged on the lifting platform 22. The position sensing device 25 is electrically connected to the clamping drive device 26, and the stopper 27 is connected to the clamping drive device 26.

[0063] When the lifting platform 22 is located at the pallet unloading station, the in-place sensor device 25 is used to send an in-place signal to the clamping drive device 26 after detecting that the target pallet 100 enters the lifting platform 22; the clamping drive device 26 is used to drive the limit member 27 to abut against the target pallet 100 when receiving the in-place signal, so as to fix the target pallet 100 on the lifting platform 22.

[0064] Specifically, the in-position sensor device 25 can adopt a proximity switch, a photoelectric sensor, a magnetic position sensor based on the Hall effect, etc., which are not limited here. The clamping drive device 26 can drive the limiter 27 to move along the preset path by means of electric drive, hydraulic drive, pneumatic drive, etc.; taking the clamping drive device 26 adopting a cylinder as an example, the clamping drive device 26 can be set to multiple and distributed on the front side, rear side, left side and right side of the lifting platform 22. When the clamping drive device 26 receives the in-position signal sent by the in-position sensor device 25, the multiple clamping drive devices 26 respectively drive the corresponding limiters 27 to extend and abut against each side wall of the target pallet 100, so as to completely limit each degree of freedom of the target pallet 100 in the horizontal direction, so that the target pallet 100 can be fixed on the lifting platform 22; wherein, the limiter 27 can be set to a structure adapted to the corresponding position of the target pallet 100.

[0065] Based on the solution of this embodiment, the target pallet 100 can be automatically fixed after entering the lifting platform 22 to avoid positional displacement of the target pallet 100 relative to the lifting platform 22 and affect subsequent target vehicle body 200 loading and gluing operations, thereby improving the automation and intelligence of the double-layer conveying system.

[0066] Preferably, when the target pallet 100 carrying the target vehicle body 200 completes the gluing operation at the gluing station, the clamping drive device 26 can be automatically triggered to drive the limit member 27 to separate from the target pallet 100 to release the fixation of the target pallet 100, so that the target pallet 100 carrying the target vehicle body 200 can enter the upper conveyor line 4 from the lifting platform 22.

[0067] In one embodiment, reference Figures 1 to 3 The lifting assembly 2 also includes a vehicle type detection device 28 and a prompting device (not shown in the figure); the vehicle type detection device 28 is arranged on the lifting platform 22, and the vehicle type detection device 28 is electrically connected to the gluing device 3, the lifting drive device 23, and the prompting device. The gluing device 3 pre-stores the parameters of the tray to be glued;

[0068] When the lifting platform 22 is located at the loading station on the vehicle body, the vehicle type detection device 28 is used to obtain the parameters of the target pallet 100 and compare them with the parameters of the pallet to be coated with glue to obtain a comparison result; the vehicle type detection device 28 is used to send a first signal to the lifting drive device 23 when the comparison result is compatible, so as to trigger the lifting drive device 23 to drive the lifting platform 22 to move upward to the gluing station; the vehicle type detection device 28 is used to send a second signal to the prompt device when the comparison result is incompatible, so as to trigger the prompt device to perform an error alarm operation.

[0069] Specifically, the vehicle type detection device 28 can identify and detect the workpiece information of the target vehicle body 200 placed on the target pallet 100, wherein the workpiece information can be the size parameters, shape profile parameters, workpiece code, etc. of the target vehicle body 200, which can be used to distinguish it from other models of target vehicle bodies 200; the vehicle type detection device 28 includes but is not limited to distance sensors, proximity sensors, through-beam sensors and image sensors; taking the distance sensor as an example, the distance sensor can measure the straight-line distance from its installation position to a certain part on the target vehicle body 200, so that the difference of the corresponding part of the target vehicle body 200 can be identified based on the measured distance, and then the model of the target vehicle currently placed on the target pallet 100 can be determined based on the difference of the part. body 200; taking a proximity sensor or a through-beam sensor as an example, the proximity sensor can detect whether there is a corresponding object within a preset range, and the through-beam sensor can detect whether there is an object blocking the two probes, so that the model of the target body 200 currently placed on the target pallet 100 can be determined according to whether the proximity sensor and the through-beam sensor detect the corresponding structure of a certain part on the target body 200; taking an image sensor as an example, the image sensor can obtain image information of the target body 200 currently placed on the target pallet 100, and recognize the shape contour of the target body 200 through image processing technology, or recognize the workpiece code engraved on the target body 200, so as to determine the model of the target body 200.

[0070] The parameters of the to-be-glued pallet pre-stored in the gluing device 3 and the parameters of the target vehicle body 200 obtained by the vehicle type detection device 28 belong to the same parameter type, so the two parameters can be compared and a comparison result can be obtained; when the above two parameters are consistent (that is, the comparison result is compatible), it can be determined that the target vehicle body 200 placed on the target pallet 100 at this time is the type of vehicle body that the gluing device 3 is ready to perform the gluing operation, and the vehicle type detection device 28 can trigger the lifting drive device 23 to drive the lifting platform 22 to move upward to the gluing station by sending a first signal, so as to directly perform the gluing operation on the target vehicle body 200 on the target pallet 100; when the above two parameters are inconsistent (that is, the comparison result is incompatible), it can be determined that the target vehicle body 200 placed on the target pallet 100 at this time is not the type of vehicle body that the gluing device 3 is ready to perform the gluing operation, that is, there is a placement error, and at this time the vehicle type detection device 28 can trigger the prompt device to perform an error alarm operation by sending a second signal to remind the operator to replace the wrong target vehicle body 200, so as to avoid the subsequent gluing operation on the wrong target vehicle body 200 and cause the vehicle body to be scrapped.

[0071] Based on the above settings, the target vehicle body 200 can be automatically identified, and when the target vehicle body 200 is placed correctly, the target vehicle body 200 can be automatically driven to enter the gluing work for gluing operation, and when the target vehicle body 200 is placed incorrectly, the operator can be informed in time to replace it, thereby further improving the automation and intelligence level of the double-layer conveying system.

[0072] In one embodiment, reference Figures 1 to 3 The double-layer conveying system also includes a first material blocking drive assembly 5, which is arranged at the input end of the upper conveying line 4. The first material blocking drive assembly 5 is used to block the target pallet 100 of the gluing station from entering the upper conveying line 4 from the lifting platform 22 when in an extended state.

[0073] In one embodiment, reference Figures 1 to 3 The double-layer conveying system also includes a second material blocking drive assembly 6, which is arranged at the output end of the upper conveying line 4. The second material blocking drive assembly 6 is used to block the target pallet 100 of the body unloading station from entering the transfer trolley from the upper conveying line 4 when in an extended state.

[0074] In one embodiment, reference Figures 1 to 3 The double-layer conveying system also includes a third material blocking drive assembly 7, which is arranged at the output end of the lower conveying line 1. The third material blocking drive assembly 7 is used to block the target pallet 100 of the pallet unloading station from entering the lifting platform 22 from the lower conveying line 1 when in an extended state.

[0075] In one embodiment, reference Figures 1 to 3 The double-layer conveying system also includes a fourth material blocking drive assembly 8, which is arranged in the middle of the lower conveying line 1. The fourth material blocking drive assembly 8 is used to block the target pallet 100 located in the middle of the lower conveying line 1 from entering the pallet unloading station when in an extended state.

[0076] Specifically, the first material blocking drive assembly 5, the second material blocking drive assembly 6, the third material blocking drive assembly 7, and the fourth material blocking drive assembly 8 may include a fixed portion and a movable portion, and the movable portion may be driven to extend or retract relative to the fixed portion by hydraulic drive, pneumatic drive, etc. When the above-mentioned material blocking drive assembly is in an extended state (i.e., when the movable portion is extended), the extended movable portion may form a block on the corresponding channel to prevent the target pallet 100 from passing there; when the above-mentioned material blocking drive assembly is in a retracted state (i.e., when the movable portion is retracted), the movable portion will no longer form a block on the corresponding channel, and the target pallet 100 may pass there.

[0077] By setting the first material blocking drive assembly 5, the target pallets 100 of the gluing station can be restricted from continuing to be fed into the upper conveyor line 4 when the transfer trolley fails to transfer the target pallet 100 in time and the number of target pallets 100 of the upper conveyor line 4 is too large, thereby avoiding the upper conveyor line 4 from being scratched due to overcrowding. By setting the second material blocking drive assembly 6, the target pallet 100 of the upper conveyor line 4 can be released onto the transfer trolley after the transfer trolley is ensured to be docked with the output end of the upper conveyor line 4, thereby avoiding the target pallet 100 from falling from the output end of the upper conveyor line 4. By setting the third material blocking drive assembly 7, the target pallet 100 of the lower conveyor line 1 can be transported to the lifting platform 22 after the lifting platform 22 is ensured to move downward to the pallet unloading station, thereby avoiding the target pallet 100 from being output from the output end of the lower conveyor line 1 in advance when the lifting platform 22 is not in place. By setting the fourth material blocking drive component 8, in the process of conveying the target pallet 100 on the lower conveyor line 1 to the lifting platform 22, the blocking effect of the fourth material blocking drive component 8 can be utilized to ensure that only a preset number of target pallets 100 (preferably one target pallet 100) in front of the fourth material blocking drive component 8 can enter the lifting platform 22 under the drive of the lower conveyor line 1, and the target pallet 100 behind the fourth material blocking drive component 8 is blocked and continues to stay on the lower conveyor line 1. In this way, the number of target pallets 100 entering the lifting platform 22 each time can be limited, thereby avoiding confusion caused by too many target pallets 100 entering the lifting platform 22 at the same time under the drive of the lower conveyor line 1.

[0078] By setting the above-mentioned first material blocking drive assembly 5, second material blocking drive assembly 6, third material blocking drive assembly 7 and fourth material blocking drive assembly 8, a blocking effect can be formed on the target pallet 100 at the corresponding positions of the lower conveyor line 1 and the upper conveyor line 4, and the blocked target pallet 100 can be released at the corresponding time node. In this way, the cooperation between the material blocking drive assembly and the conveyor line can be utilized to accurately control the movement timing and movement amount of the target pallet 100, so as to better coordinate the action rhythm and improve the accuracy of the overall action process.

[0079] In one embodiment, reference Figures 1 to 3 The double-layer conveying system also includes a counting device (not shown in the figure), which is electrically connected to the first material stopper drive assembly 5; the counting device is used to obtain the first number of target pallets 100 of the upper conveying line 4, and the counting device is used to send a first blocking signal to the first material stopper drive assembly 5 when the first number reaches a first preset value, so as to drive the first material stopper drive assembly 5 to extend.

[0080] By setting a counting device, the first material blocking drive assembly 5 can be automatically triggered to extend when the target pallets 100 of the upper conveyor line 4 reach a critical number (i.e., the first preset value), so as to prevent the lifting platform 22 from continuing to supply the target pallets 100 to the upper conveyor line 4, thereby avoiding the upper conveyor line 4 from being scratched due to excessive crowding. Among them, the counting function of the counting device can be assisted by photoelectric sensors, electromagnetic sensors, etc. The photoelectric sensor can count based on optical principles and according to the signal changes before and after the shielding, and the electromagnetic sensor can count based on the electromagnetic induction principle and according to the changes in the induced electromagnetic field generated when the object passes through the sensor.

[0081] Based on the above arrangement, the first material blocking driving assembly 5 can be automatically triggered to block the target pallet 100 when the preset conditions are met, thereby further improving the automation and intelligence of the double-layer conveying system.

[0082] In one embodiment, reference Figures 1 to 3 The fourth material blocking drive assembly 8 is electrically connected to the third material blocking drive assembly 7 and the booster conveyor line 24; the third material blocking drive assembly 7 is used to send a second blocking signal to the fourth material blocking drive assembly 8 when switching from an extended state to a retracted state, and the booster conveyor line 24 is used to send a third blocking signal to the fourth material blocking drive assembly 8 when starting, and the fourth material blocking drive assembly 8 is used to extend upon receiving the second blocking signal and the third blocking signal.

[0083] Specifically, when the third material blocking drive assembly 7 switches from the extended state to the retracted state and the booster conveyor line 24 starts to start, it can be determined that the target pallet 100 of the lower conveyor line 1 needs to be transported to the lifting platform 22 at this time. At this time, the third material blocking drive assembly 7 and the booster conveyor line 24 can automatically trigger the fourth material blocking drive assembly 8 to extend by sending the second blocking signal and the third blocking signal, so as to utilize the blocking effect of the fourth material blocking drive assembly 8 to ensure that only a preset number of target pallets 100 (preferably one target pallet 100) in front of the fourth material blocking drive assembly 8 can enter the lifting platform 22 under the drive of the lower conveyor line 1 and the booster conveyor line 24, while the target pallet 100 behind the fourth material blocking drive assembly 8 is blocked and continues to stay on the lower conveyor line 1. In this way, the number of target pallets 100 entering the lifting platform 22 each time can be limited to avoid too many target pallets 100 entering the lifting platform 22 at the same time under the drive of the lower conveyor line 1 and causing confusion.

[0084] Based on the above configuration, the fourth material blocking component can be automatically triggered to block the target pallet 100 when the preset conditions are met, thereby further improving the automation and intelligence of the double-layer conveying system.

[0085] In one embodiment, reference Figures 1 to 4The double-layer conveying system also includes a transition roller 9 and a damping structure 10. The transition roller 9 is arranged between the gluing station and the input end of the upper conveying line 4, and the transition roller 9 rotates around a horizontal axis; the damping structure 10 is used to abut against the transition roller 9 to hinder the rotation of the transition roller 9.

[0086] When the lifting platform 22 is located at the gluing station, the booster conveyor line 24 is used to push the target pallet 100 of the lifting platform 22 to enter the upper conveyor line 4 after passing through the transition roller 9 .

[0087] In actual applications, there is usually a certain difference between the conveying rate of the booster conveyor line 24 and the conveying rate of the upper conveyor line 4 due to differences in driving parameters, load size, structural form, etc., and there may also be a certain height difference between the output end of the booster conveyor line 24 and the input end of the upper conveyor line 4 due to the actual overall structural deviation. The existence of this speed difference and height difference may cause the target pallet 100 to deflect, flip, etc. at the node where it enters the upper conveyor line 4 from the booster conveyor line 24, affecting the stability of the target pallet 100 during the subsequent conveying process.

[0088] In this regard, the present embodiment adds a transition roller 9 between the gluing station and the input end of the upper conveyor line 4 (i.e., between the output end of the boosting conveyor line 24 and the input end of the upper conveyor line 4), and the contact between the damping structure 10 and the surface of the transition roller 9 has a certain hindering effect on the rotation of the transition roller 9; since the load of the upper conveyor line 4 is usually greater than the load of the boosting conveyor line 24, the conveying rate of the upper conveyor line 4 is usually slightly lower than the conveying rate of the boosting conveyor line 24, and based on the above-mentioned setting, the target pallet 100 will first pass through the transition roller 9 at the node where it enters the upper conveyor line 4 from the boosting conveyor line 24, and the target pallet 100 will drive the transition roller 9 to roll, and the transition roller 9 will be hindered by the damping structure 10 during the rolling process. A reverse deceleration effect is formed on the target pallet 100, so that the moving speed of the target pallet 100 is reduced to a level closer to the current conveying rate of the upper conveyor line 4; in addition, the transition roller 9 can play a certain position transition and buffering role between the boosting conveyor line 24 and the upper conveyor line 4 based on its passive rolling characteristics, and can compensate for the height difference between the output end of the boosting conveyor line 24 and the input end of the upper conveyor line 4 to a certain extent; based on the above settings, the influence of the speed difference and height difference on the target pallet 100 can be reduced, ensuring that the target pallet 100 can enter the upper conveyor line 4 more smoothly from the boosting conveyor line 24, and can avoid problems such as deviation and flipping to a certain extent, thereby improving the stability of the target pallet 100 in the subsequent conveying process.

[0089] In one embodiment, reference Figures 1 to 4The damping structure 10 includes a fixed seat 101, a connecting seat 102, an elastic telescopic member 103 and an elastic damping member 104; the fixed seat 101 is connected to the input end of the upper conveying line 4, the lower end of the elastic telescopic member 103 is connected to the fixed seat 101, the upper end of the elastic telescopic member 103 is connected to the connecting seat 102, the transition roller 9 is rotatably connected to the connecting seat 102 around a horizontal axis, the lower end of the elastic damping member 104 is arranged on the fixed seat 101, and the upper end of the elastic damping member 104 abuts against the transition roller 9;

[0090] The transition roller 9 is used to overcome the elastic force of the elastic telescopic member 103 and move downward under the gravity of the target pallet 100; the elastic damping member 104 is used to be compressed downward under the pressing force of the transition roller 9 to apply a gradually increasing damping force in the reverse direction to the transition roller 9 during the compression process.

[0091] In actual applications, when conveying target pallets 100 and target vehicle bodies 200 of different specifications, there will be differences in the actual loads of the upper conveyor line 4 and the booster conveyor line 24, and there is a quantity difference between the target pallets 100 of the upper conveyor line 4 and the target pallets 100 of the booster conveyor line 24, which causes the difference between the conveying rate of the upper conveyor line 4 and the conveying rate of the booster conveyor line 24 to be in an uncertain state. This makes it difficult to coordinate the speed difference between the booster conveyor line 24 and the upper conveyor line 4 through the transition roller 9 with a single damping force in the above-mentioned embodiment, and it is difficult to ensure that the target pallet 100 can smoothly enter the upper conveyor line 4 from the booster conveyor line 24 under different conditions.

[0092] After research and analysis, the researchers of this application found that since the number of target pallets 100 on the upper conveyor line 4 is greater than the number of target pallets 100 on the booster conveyor line 24, as the weight of a single target pallet 100 increases, the load increase on the upper conveyor line 4 will be greater than the load increase on the booster conveyor line 24, and thus the conveying rate decrease on the upper conveyor line 4 will be greater than the conveying rate decrease on the booster conveyor line 24; in other words, as the weight of a single target pallet 100 increases, at the node where the target pallet 100 is transferred from the booster conveyor line 24 to the upper conveyor line 4, the moving speed of the target pallet 100 needs to be reduced more significantly, so as to ensure that the moving speed of the target pallet 100 can be closer to the current conveying rate of the upper conveyor line 4.

[0093] Based on the above problems and findings, the present embodiment correspondingly sets the transition roller 9 to a form in which the damping force can be adaptively adjusted. Figure 4, when the target pallet 100 passes over the transition roller 9, the target pallet 100 can drive the transition roller 9 to overcome the elastic force of the elastic telescopic member 103 and move downward based on its own weight, and the transition roller 9 will continuously squeeze the elastic damping member 104 during the downward movement; it can be understood that the heavier the weight of the target pallet 100, the greater the pressing force the target pallet 100 will apply to the transition roller 9 based on its own weight, thereby driving the transition roller 9 to overcome the elastic force of the elastic telescopic member 103 and move downward to a lower position, thereby making the compression of the elastic damping member 104 greater, based on the characteristic that the elastic force increases with the increase of the compression, the elastic damping member 104 will apply a greater damping force to the transition roller 9 in the reverse direction, thereby increasing the rotational resistance of the transition roller 9. Based on the above settings, when the weight of the target pallet 100 is heavier, the transition roller 9 can reduce the moving speed of the target pallet 100 to a greater extent based on its adjustable damping force, so that the moving speed of the target pallet 100 after passing through the transition roller 9 is closer to the current conveying rate of the upper conveyor line 4, thereby ensuring to a certain extent that target pallets 100 of different specifications can smoothly enter the upper conveyor line 4 from the booster conveyor line 24, so that the transition roller 9 can better adapt to different application situations based on the characteristic that its damping force can be adaptively adjusted.

[0094] The above description is only an exemplary embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the technical concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A double-layer conveying system, characterized in that: The double-layer conveying system comprises: A lower conveyor line, wherein the lower conveyor line is used to sequentially convey a plurality of target pallets from a pallet loading station to a pallet unloading station; A lifting assembly, the bottom of which is connected to the output end of the lower conveyor line; the lifting assembly is used to convey the target pallet of the pallet unloading station upward to the body loading station, and the lifting assembly is used to convey the target pallet loaded with the target body in the body loading station upward to the gluing station; A gluing device, the gluing device is connected to the middle part of the lifting assembly; the gluing device is used to apply glue to the target vehicle body at the gluing station; An upper conveyor line, the input end of which is butted against the top of the lifting assembly; the upper conveyor line is used to convey the target pallet carrying the target vehicle body in the gluing station to the vehicle body unloading station; A transfer trolley, the transfer trolley is docked with the input end of the lower conveyor line and the output end of the upper conveyor line, the transfer trolley is used to put the empty target pallet into the pallet loading station, and the transfer trolley is used to collect the target pallet carrying the target body in the body unloading station; The lifting assembly includes a fixed bracket, a lifting platform, a lifting drive device, a booster conveyor line, an in-position sensor device, a clamping drive device and a limiter; the pallet unloading station, the body loading station and the gluing station are arranged on the fixed bracket from bottom to top, and the lifting platform is slidably connected to the fixed bracket along the up and down directions. The lifting drive device is used to drive the lifting platform to move between the pallet unloading station, the body loading station and the gluing station; The booster conveyor line is arranged on the lifting platform; when the lifting platform is located at the pallet unloading station, the booster conveyor line is docked with the lower conveyor line, and the booster conveyor line is used to pull the target pallet of the lower conveyor line into the lifting platform; when the lifting platform is located at the gluing station, the booster conveyor line is docked with the upper conveyor line, and the booster conveyor line is used to push the target pallet of the lifting platform into the upper conveyor line; The in-position sensor device and the clamping drive device are arranged on the lifting platform, the in-position sensor device is electrically connected to the clamping drive device, and the limiter is connected to the clamping drive device; When the lifting platform is located at the pallet unloading station, the in-place sensor device is used to send an in-place signal to the clamping drive device after detecting that the target pallet enters the lifting platform; the clamping drive device is used to drive the limit member to abut against the target pallet when receiving the in-place signal, so as to fix the target pallet on the lifting platform.

2. The double-layer conveying system according to claim 1, characterized in that: The lifting assembly further includes a vehicle type detection device and a prompting device; the vehicle type detection device is arranged on the lifting platform, the vehicle type detection device is electrically connected to the gluing device, the lifting drive device, and the prompting device, and the gluing device pre-stores the parameters of the pallet to be glued; When the lifting platform is located at the loading station on the vehicle body, the vehicle type detection device is used to obtain the parameters of the target pallet and compare them with the parameters of the pallet to be glued to obtain a comparison result; the vehicle type detection device is used to send a first signal to the lifting drive device when the comparison result is compatible, so as to trigger the lifting drive device to drive the lifting platform to move upward to the gluing station; the vehicle type detection device is used to send a second signal to the prompt device when the comparison result is incompatible, so as to trigger the prompt device to perform an error alarm operation.

3. The double-layer conveying system according to claim 1, characterized in that: The double-layer conveying system further includes a first material blocking drive assembly, which is arranged at the input end of the upper conveying line, and is used to block the target pallet of the gluing station from entering the upper conveying line from the lifting platform in an extended state; And / or, the double-layer conveying system also includes a second material blocking drive assembly, which is arranged at the output end of the upper conveying line, and the second material blocking drive assembly is used to block the target pallet of the body unloading station from entering the transfer trolley from the upper conveying line when in an extended state.

4. The double-layer conveying system according to claim 1, characterized in that: The double-layer conveying system further includes a third material blocking drive assembly, which is arranged at the output end of the lower conveying line, and is used to block the target pallet of the pallet unloading station from entering the lifting platform from the lower conveying line in an extended state; And / or, the double-layer conveying system also includes a fourth material blocking drive assembly, which is arranged in the middle of the lower conveying line, and the fourth material blocking drive assembly is used to block the target pallet located in the middle of the lower conveying line from entering the pallet unloading station in an extended state.

5. The double-layer conveying system according to claim 3, characterized in that: The double-layer conveying system also includes a counting device, which is electrically connected to the first material stop drive assembly; the counting device is used to obtain a first number of the target pallets of the upper conveying line, and the counting device is used to send a first blocking signal to the first material stop drive assembly when the first number reaches a first preset value, so as to drive the first material stop drive assembly to extend.

6. The double-layer conveying system according to claim 4, characterized in that: The fourth material blocking drive assembly is electrically connected to the third material blocking drive assembly and the booster conveyor line; the third material blocking drive assembly is used to send a second blocking signal to the fourth material blocking drive assembly when switching from an extended state to a retracted state, and the booster conveyor line is used to send a third blocking signal to the fourth material blocking drive assembly when starting, and the fourth material blocking drive assembly is used to extend upon receiving the second blocking signal and the third blocking signal.

7. The double-layer conveying system according to claim 1, characterized in that: The double-layer conveying system further comprises a transition roller and a damping structure, wherein the transition roller is arranged between the gluing station and the input end of the upper conveying line, and the transition roller rotates around a horizontal axis; the damping structure is used to abut against the transition roller to hinder the rotation of the transition roller; When the lifting platform is located at the gluing station, the booster conveyor line is used to push the target tray of the lifting platform to enter the upper conveyor line after passing through the transition roller.

8. The double-layer conveying system according to claim 7, characterized in that: The damping structure comprises a fixed seat, a connecting seat, an elastic telescopic member and an elastic damping member; the fixed seat is connected to the input end of the upper conveying line, the lower end of the elastic telescopic member is connected to the fixed seat, the upper end of the elastic telescopic member is connected to the connecting seat, the transition roller is rotatably connected to the connecting seat around a horizontal axis, the lower end of the elastic damping member is arranged on the fixed seat, and the upper end of the elastic damping member abuts against the transition roller; The transition roller is used to overcome the elastic force of the elastic telescopic member and move downward under the gravity of the target pallet; the elastic damping member is used to be compressed downward under the pressing force of the transition roller to apply a gradually increasing damping force in the reverse direction to the transition roller during the compression process.

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