Automatic workpiece transfer mechanism

Abstract

The present application discloses an automatic workpiece transfer mechanism, which belongs to the technical field of transport devices. The key points of its technical solution are an automatic workpiece transfer mechanism, including an AGV vehicle, a transport rack connected to the AGV vehicle, and a plurality of pallets for placing workpieces. It also includes two conveying devices respectively placed at the end of a workpiece processing process and the beginning of a next process, a temporary storage device is provided near the conveying device located at the end of the workpiece processing process, and a transition device is provided near the conveying device located at the beginning of the next process; the pallet is connected to the conveying device, the temporary storage device, the transport rack, and the transition device. When the transport rack is in a loading state, one end of the transport rack is connected to an end of the temporary storage device away from the conveying device. When the transport rack is in a discharging state, the other end of the transport rack is connected to an end of the transition device away from the conveying device, thereby achieving the effect of improving work efficiency.

Description

Technical Field

[0001] The present application relates to the technical field of transportation devices, and in particular to an automatic workpiece transport mechanism. Background Art

[0002] At present, many workpieces are transported to the next process after processing is completed by automatic guided vehicles, referred to as AGVs. AGVs have developed rapidly as a necessary means of automated loading and unloading in connecting and regulating discrete logistics management systems.

[0003] In related technologies, after the production line is completed, the workers place the workpiece on a pallet. The AGV is fixedly connected to a transport rack, and multiple pallets are placed on the transport rack at the same time. The AGV moves to a suitable position, and finally the workpiece is placed in the appropriate position for the next process by manual transportation, thereby completing the loading, transportation, and unloading operations.

[0004] With respect to the above-mentioned related technologies, the inventor believes that the workers place the workpieces on a pallet and then remove them and place them in a suitable position, which wastes a lot of manpower and has low work efficiency. Summary of the Invention

[0005] In order to improve work efficiency, the present invention provides an automatic workpiece transport mechanism.

[0006] The present invention provides an automatic workpiece transport mechanism that adopts the following technical solutions:

[0007] An automatic workpiece transport mechanism, comprising a plurality of pallets for placing workpieces, an AGV vehicle, and a transport frame connected to the AGV vehicle, and also comprising two conveying devices respectively placed at the end of a workpiece processing step and the beginning of the next step, a temporary storage device being provided on the conveying device near the end of the workpiece processing step, and a transition device being provided on the conveying device near the beginning of the next step;

[0008] The pallet is connected to the conveying device, the temporary storage device, the transport rack, and the transition device. When the transport rack is in a loading state, one end of the transport rack is connected to an end of the temporary storage device away from the conveying device. When the transport rack is in a discharging state, the other end of the transport rack is connected to an end of the transition device away from the conveying device.

[0009] By adopting the above technical solution, when the workpiece is processed and needs to be loaded, the robotic arm places the processed workpiece on the pallet of the conveying device, and then the conveying device transports the pallet to the temporary storage device. Multiple pallets are temporarily stored on the temporary storage device. When the AGV car drives the transport rack to the vicinity of the temporary storage device, the temporary storage device is connected to the conveying device, and the pallet carrying the workpiece on the temporary storage device is transported to the transport rack again. The transport rack is separated from the temporary storage device, and the AGV car drives the transport rack to the next process. The transport rack is connected to the transition device, and the pallet carrying the workpiece is transported to the transition assembly. The transition assembly temporarily stores the workpiece and transports the pallets carrying the workpiece one by one to another group of conveying devices, and then another robotic arm takes the workpiece in the pallet on the conveying device and places it in the next process, which greatly improves work efficiency.

[0010] Preferably, the conveying device includes a base, a lifting platform connected to the top of the base, and a transmission component connected to the lifting platform, and the tray is connected to the transmission component.

[0011] By adopting the above technical solution, the conveying device is placed in a suitable position, the height of the lifting platform is adjusted, and the pallet stops at a fixed position of the conveying component, making it convenient for the robotic arm to place the workpiece on the pallet, so that it can smoothly transport the pallet with the workpiece from the conveying component to the temporary storage rack.

[0012] Preferably, the conveying assembly includes a conveying frame connected to the top of the lifting platform, four sprockets connected to the conveying frame, two chains meshing with the sprockets, and a driving member connected to the conveying frame. The four sprockets are grouped in pairs, and the two groups of sprockets are respectively located on both sides of the length direction of the conveying frame. The two groups of sprockets are linked by two linkage rods, and the length direction of the linkage rods is perpendicular to the sprockets. The driving member is connected to the two groups of sprockets, and one chain is sleeved on a group of sprockets, and the tray abuts against the chain.

[0013] By adopting the above technical solution, the driving member drives the sprocket to rotate, and the two sets of sprockets are linked through the linkage rod, and drive the two chains to move. The chain movement transports the pallet with the workpiece to the temporary storage device for temporary storage.

[0014] Preferably, the height of one end of the transport rack is greater than the height of the other end, and its lower end is connected to a second limit piece. The temporary storage device includes a temporary storage rack for temporarily storing multiple pallets and a first limit piece to limit the position of the pallets. The height of one end of the temporary storage rack close to the base is greater than the height of the other end, and its smaller end is connected to the larger end of the transport rack, and its minimum height is equal to the maximum height of the transport rack. The temporary storage rack and the transport rack are both connected to a sliding assembly that drives the pallets to slide, and the first limit piece is connected to the temporary storage rack and away from the base.

[0015] By adopting the above technical solution, when the pallet with the workpiece is transported to the temporary storage rack by the sprocket and the chain, since the height of the temporary storage rack away from the base is relatively small, the sliding assembly causes the pallet to slide to the end away from the base, and the first limit member limits the position of the pallet to prevent the pallet from detaching from the temporary storage rack. Multiple pallets are arranged on the temporary storage rack in sequence without affecting the simultaneous placement of multiple pallets on the temporary storage rack; when the pallet with the workpiece is transported to the transport rack, the first limit member is released, and due to gravity, the pallet slides to the transport rack. Since the height of the end of the transport rack away from the base is relatively small, the sliding assembly causes the pallet to slide again in sequence to the end of the transport rack away from the base, and the second limit member limits it to prevent the pallet from detaching from the transport rack. When all the pallets on the temporary storage rack are transported to the transport rack or the temporary storage rack is full, the AGV drives the transport rack to detach from the temporary storage device and starts transportation.

[0016] Preferably, the transition device includes a storage rack for temporarily placing multiple pallets and a thrust assembly for controlling the pallets to stop. The storage rack is arranged close to the base, and the height of one end of the storage rack close to the next process is smaller than the height of the other end. The end with the larger height is connected to the end with the smaller height of the transport rack, and the maximum height is equal to the minimum height of the transport rack. The top of the storage rack is connected to the sliding assembly, and the thrust assembly is connected to the storage rack and close to the base.

[0017] By adopting the above technical solution, the AGV vehicle drives the transport rack to transport the workpiece to the next process. The transport rack is connected to the storage rack. Since the height of the storage rack is smaller at the end away from the transport rack, the pallet on the transport rack is transported to the storage rack. The sliding assembly causes the pallet to slide to the end away from the transport rack, and the thrust assembly limits the position of the pallet to prevent the pallet from leaving the storage rack. Multiple pallets are arranged on the storage rack in sequence.

[0018] Preferably, the thrust assembly includes a support frame connected to the storage rack, a support column connected to the support frame, a connecting rod with a middle section rotatably connected to the support column, a first thrust rod rotatably connected to one end of the connecting rod, a second thrust rod rotatably connected to the other end of the connecting rod, and a third cylinder connected to the support frame, and a drive shaft of the third cylinder is fixedly connected to the bottom of the first thrust rod.

[0019] By adopting the above technical solution, the third cylinder extends the drive shaft to make the first thrust rod limit the position of the pallet to prevent the pallet from falling off the storage rack. When the pallet with the workpiece needs to be transported to the chain, the third cylinder retracts the drive shaft, the first thrust rod retracts downward, and a pallet slides toward the chain. The first thrust rod drives one end of the connecting rod to tilt downward, and at the same time, the other end of the connecting rod tilts upward, driving the second thrust rod to extend upward, limiting the position of the next pallet. The operation is cyclical in sequence, and multiple pallets are transported to the chain on the storage rack in turn, and then taken away by the robotic arm in turn.

[0020] Preferably, the temporary storage rack, the transport rack, and the storage rack are all connected to a return assembly for placing the empty pallets, and the return assembly includes a plurality of return racks and a fourth position-limiting member for limiting the position of the pallets. The plurality of return racks are respectively connected to the temporary storage rack, the transport rack, and the storage rack, and the height of one end of the return rack closer to the starting point of the next process is greater than the height of the other end;

[0021] The minimum height of the return rack connected to the storage rack is equal to the maximum height of the return rack connected to the transport rack, the minimum height of the return rack connected to the transport rack is equal to the maximum height of the return rack connected to the temporary storage rack, the fourth limiter is fixedly connected to the end of the return rack with a smaller height, the storage rack is connected to a fifth limiter near the end with a smaller height for limiting the next pallet, and the return rack is connected to the sliding assembly.

[0022] By adopting the above technical solution, after the robotic arm takes away the workpiece, the lifting device rises and transports the empty pallet to the return rack connected to the storage rack. The height of the return rack away from the lifting device is smaller, and the sliding assembly causes the pallet to slide to the end away from the lifting device, and the pallet is limited by the fourth limiter. When the transport rack is connected to the storage rack, the pallet on the return rack connected to the storage rack slides to the return rack connected to the transport rack, and is limited by the fourth limiter. When the transport rack is connected to the temporary storage rack, the pallet on the return rack connected to the transport rack slides to the return rack connected to the temporary storage rack, and is limited by the fourth limiter. When there is no empty pallet to place the workpiece on the chain close to the temporary storage rack, the lifting platform rises, the fourth limiter retracts, a pallet slides onto the chain, and the fifth limiter extends to limit the position of the next pallet. Repeat this operation to allow the empty pallets to replace the workpieces in turn.

[0023] Preferably, the sliding assembly includes a placement rack and transmission rollers rotatably connected to the side walls of the placement rack, the placement rack is connected to the temporary storage rack, the transport rack or the storage rack, and two groups of transmission rollers are provided, and the two groups of transmission rollers are respectively close to the two sides of the temporary storage rack, and one group of transmission rollers is provided with multiple transmission rollers, and the multiple transmission rollers are arranged at equal intervals along the length direction of the placement rack, and their axes are perpendicular to the length direction of the placement rack.

[0024] By adopting the above technical solution, when the pallet is placed on a temporary storage rack, a transport rack or a storage rack, the transmission roller causes the pallet to slide due to gravity; at the same time, the transmission roller and the pallet will not be worn, thereby increasing the service life of the transmission roller and the pallet.

[0025] Preferably, the sliding assembly also includes a limiting roller rotatably connected to the top of the placement rack, and two groups of limiting rollers are horizontally arranged, and the two groups of limiting rollers are respectively close to the two sides of the temporary storage rack, and one group of limiting rollers is provided with multiple limiting rollers, and the multiple limiting rollers are arranged at equal intervals along the length direction of the placement rack, and their axes are perpendicular to the placement rack and the transmission roller.

[0026] By adopting the above technical solution, the limiting roller limits the position of the pallet, preventing the pallet from positional displacement, thereby preventing it from detaching from the temporary storage rack, transport rack or storage rack; at the same time, it does not cause wear to the pallet, thereby increasing the service life of the limiting roller and the pallet.

[0027] In summary, the present invention has the following beneficial effects:

[0028] 1. When the workpiece is processed and needs to be loaded, the robotic arm places the processed workpiece on the pallet of the conveyor device, and then the conveyor device transports the pallet to the temporary storage device. Multiple pallets are temporarily stored on the temporary storage device. The AGV car drives the transport rack to connect with the temporary storage device. The pallets on the temporary storage device are transported to the transport rack in turn. The transport rack is separated from the temporary storage device, and the AGV car drives the transport rack to connect with the transition device. The pallet is transported to the transition assembly, which temporarily stores the workpiece and transports the pallets carrying the workpiece one by one to another set of conveyors. Another robotic arm then takes the workpiece from the pallet on the conveyor device and places it in the next process, which greatly improves work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic diagram of the overall structure of an automatic workpiece transfer mechanism.

[0030] Figure 2 yes Figure 1 Schematic diagram of the enlarged structure of part A.

[0031] Figure 3 It is a schematic diagram of the overall structure of the conveying device.

[0032] Figure 4 yes Figure 1 Schematic diagram of the enlarged structure of part B.

[0033] Figure 5 yes Figure 1 Schematic diagram of the enlarged structure of part C.

[0034] Figure 6 This is a partial structural diagram of the storage rack.

[0035] Description of reference numerals:

[0036] 1. Conveying device; 11. Base; 12. Lifting platform; 13. Conveying assembly; 131. Conveying rack; 132. Sprocket; 133. Chain; 134. Motor; 2. Pallet; 21. Sliding plate; 211. Conveying part; 212. Connecting part; 3. Temporary storage device; 31. Temporary storage rack; 32. First cylinder; 4. Transport assembly; 41. AGV vehicle; 42. Transport rack; 43. Second cylinder; 5. Transition device; 51. Storage rack; 52. Thrust assembly; 521. Support rack; 522. Support column; 523. Connecting rod; 524. First thrust rod; 525. Second thrust rod; 526. Third cylinder; 6. Return assembly; 61. Return rack; 62. Fourth cylinder; 7. Sliding assembly; 71. Placement rack; 72. Transport roller; 73. Limit roller; 8. Linkage rod; 9. Fifth cylinder. DETAILED DESCRIPTION

[0037] The present invention will be further described in detail below with reference to the accompanying drawings.

[0038] A workpiece automatic transport mechanism, referring to Figure 1 and Figure 2 , including a conveying device 1, a pallet 2, a temporary storage device 3, a transport component 4 and a transition device 5. Two conveying devices 1 are provided, which are respectively located at the end where the workpiece is processed and the starting end of the next process of the workpiece. The pallet 2 is connected to the conveying device 1 and is used to place the workpiece. The temporary storage device 3 is set close to the conveying device 1 located at the end where the workpiece is processed and is used to temporarily store the processed workpiece. One end of the transport component 4 is connected to the temporary storage device 3 and is used to place the workpiece on the transport component 4 and transport it. The transition device 5 is set close to the conveying device 1 located at the next process of the workpiece and is used to place the pallet 2 for the workpiece to enter the next process.

[0039] Reference Figure 3 The conveying device 1 includes a base 11, a lifting platform 12 and a transmission component 13. The bottom of the lifting platform 12 is fixedly connected to the top of the base 11. The transmission component 13 includes a transmission frame 131, a sprocket 132, a chain 133 and a driving member. The bottom of the transmission frame 131 is fixedly connected to the top of the lifting platform 12.

[0040] Reference Figure 3 There are four sprockets 132 and they are grouped in pairs. The two groups of sprockets 132 are respectively close to both sides of the length direction of the conveying frame 131 and are linked by a linkage rod 8. There are two linkage rods 8. The two ends of the linkage rod 8 are fixedly connected to the two sprockets 132, and its axis is perpendicular to the sprockets 132. One group of sprockets 132 are respectively close to both ends of the length direction of the conveying frame 131 and are rotatably connected to the conveying frame 131. There are two chains 133. One chain 133 is sleeved on a group of sprockets 132 and meshes with the sprockets 132. The tray 2 is in contact with both chains 133.

[0041] Reference Figure 3 To achieve the same purpose, the driving member can be a motor 134, a hydraulic motor, etc. In this embodiment, the motor 134 is selected. The motor 134 is fixedly connected to the conveying frame 131, and its drive shaft passes through the conveying frame 131 and is fixedly connected to the sprocket 132.

[0042] Reference Figure 2 and Figure 3 The bottom of the pallet 2 includes a sliding plate 21, which includes a conveying portion 211 and a connecting portion 212. The conveying portion 211 is a plate-shaped body with a rectangular cross-section. Two conveying portions 211 are parallel and horizontally arranged. The two conveying portions 211 are respectively in contact with the two chains 133. The connecting portion 212 is fixedly connected to the two conveying portions 211 at both ends in the longitudinal direction, and its width is no greater than the width of the conveying portion 211. The sprocket 132 and the chain 133 cooperate to transport the pallet 2 to the temporary storage rack 31.

[0043] Reference Figure 4 and Figure 5 The temporary storage device 3 includes a temporary storage rack 31 and a first limiting member. The height of one end of the temporary storage rack 31 close to the base 11 is greater than the height of the other end. The end away from the base 11 is connected to the transport component 4. To achieve the same purpose, the first limiting member can be a first cylinder 32, a baffle, etc. In this embodiment, the first cylinder 32 is selected, and the first cylinder 32 is fixedly connected to the end of the temporary storage rack 31 away from the base 11.

[0044] After entering the temporary storage rack 31 , the plurality of trays 2 slide sequentially to the end away from the base 11 , and the positions of the trays 2 are restricted by the first cylinder 32 to prevent the trays 2 from being separated from the temporary storage rack 31 .

[0045] Reference Figure 4 and Figure 5 The transport assembly 4 includes an AGV car 41, a transport frame 42 and a second limit member. The transport frame 42 is fixedly connected to the AGV car 41. The height of one end of the transport frame 42 is greater than the height of the other end. When the transport frame 42 is in the loading state, the end of the transport frame 42 with a larger height is fixedly connected to the end of the temporary storage rack 31 away from the base 11, and the maximum height of the transport frame 42 is equal to the minimum height of the temporary storage rack 31. In order to achieve the same purpose, the second limit member can select a second cylinder 43, a baffle, etc. In this embodiment, the second cylinder 43 is selected, and the second cylinder 43 is fixedly connected to the end of the transport frame 42 away from the base 11.

[0046] When the AGV 41 drives the transport rack 42 to connect with the temporary storage rack 31 , the pallet 2 on the temporary storage rack 31 slides onto the transport rack 42 and away from one end of the temporary storage rack 31 , and the second cylinder 43 limits the position of the pallet 2 to prevent the pallet 2 from separating from the temporary storage rack 31 .

[0047] Reference Figure 4 and Figure 6The transition device 5 includes a storage rack 51 and a thrust assembly 52. ​​The height of one end of the storage rack 51 close to the next process is smaller than the height of the other end. When the transport rack 42 is in the unloading state, the lower end of the transport rack 42 is fixedly connected to the higher end of the storage rack 51, and the maximum height of the storage rack 51 is equal to the minimum height of the transport rack 42.

[0048] When the transport rack 42 is connected to the storage rack 51, since the height of the storage rack 51 is smaller at one end away from the transport rack 42, the pallet 2 on the transport rack 42 is transported to the storage rack 51, and the sliding assembly 7 causes the pallet 2 to slide to the end away from the transport rack 42, and the thrust assembly 52 limits the position of the pallet 2 to prevent the pallet 2 from detaching from the storage rack 51. Multiple pallets 2 are arranged in sequence on the storage rack 51.

[0049] Reference Figure 6 The thrust assembly 52 includes a support frame 521, a support column 522, a connecting rod 523, a first thrust rod 524, a second thrust rod 525 and a third cylinder 526. The support frame 521 is fixedly connected to the storage rack 51, the support column 522 is vertically arranged, and it is fixedly connected to the support frame 521. The connecting rod 523 is horizontally arranged, and its middle section is rotatably connected to the top of the support column 522. The first thrust rod 524 and the second thrust rod 525 are both vertically arranged, and they are respectively rotatably connected to the two ends of the connecting rod 523. The third cylinder 526 is hinged to the support frame 521, and its drive shaft is fixedly connected to the bottom end of the first thrust rod 524.

[0050] When the pallet 2 with the workpiece needs to be transported to the chain 133, the third cylinder 526 retracts the drive shaft, the first thrust rod 524 retracts downward, and a pallet 2 slides toward the chain 133. The first thrust rod 524 drives one end of the connecting rod 523 to tilt downward, and at the same time, the other end of the connecting rod 523 tilts upward, driving the second thrust rod 525 to extend upward between two adjacent connecting parts 212, limiting the position of the next pallet 2. The operation is cyclical in sequence, and multiple pallets 2 are transported to the chain 133 on the storage rack 51 in turn, and then taken away by the robotic arm in turn.

[0051] Reference Figure 2 and Figure 5 , top of temporary storage rack 31, transport rack 42 (refer to Figure 4 ) top, storage rack 51 (refer to Figure 6 ) The top is connected to a return component 6, the return component 6 includes a return frame 61 and a fourth limit member, the height of one end of the return frame 61 is greater than the height of the other end, and the bottom of the return frame 61 is fixedly connected to the top of the temporary storage rack 31, the top of the transport rack 42 or the top of the storage rack 51.

[0052] Reference Figure 4 and Figure 5 , the return rack 61 fixedly connected to the temporary storage rack 31 is away from the base 11 (refer to Figure 3 ) The height of one end is greater than the height of the other end, and the maximum height of the return rack 61 is equal to the minimum height of the return rack 61 fixedly connected to the transport rack 42, and the height of the storage rack 51 (refer to Figure 6 ) The height of one end of the return rack 61 fixedly connected to the next process is greater than the other end, and the minimum height of the return rack 61 is equal to the maximum height of the return rack 61 fixedly connected to the transport rack 42.

[0053] Reference Figure 2 and Figure 3 To achieve the same purpose, the fourth limiting member can be a fourth cylinder 62, a baffle, etc. In this embodiment, the fourth cylinder 62 is selected, and the fourth cylinder 62 is fixedly connected to the lower end of the return rack 61. The return rack 61 connected to the temporary storage rack 31 is fixedly connected with a fifth limiting member. To achieve the same purpose, the fifth limiting member can be a fifth cylinder 9, a baffle, etc. In this embodiment, the fifth cylinder 9 is selected. The fifth cylinder 9 is located on the side of the fourth cylinder 62 away from the base 11, and the distance between the fifth cylinder 9 and the fourth cylinder 62 is the same as the width of the pallet 2.

[0054] After the robot arm takes the workpiece away, the lifting device rises and transports the empty pallet 2 to the return rack 61 connected to the storage rack 51, and the fourth cylinder 62 limits the pallet 2. When the transport rack 42 is connected to the storage rack 51, the pallet 2 on the return rack 61 connected to the storage rack 51 slides to the return rack 61 connected to the transport rack 42, and is limited by the fourth cylinder 62. When the transport rack 42 is connected to the temporary storage rack 31, the pallet 2 on the return rack 61 connected to the transport rack 42 slides to the return rack 61 connected to the temporary storage rack 31, and is limited by the fourth cylinder 62. When the chain 133 near the temporary storage rack 31 needs an empty pallet 2 to place a workpiece, the lifting platform 12 rises, the fourth cylinder 62 retracts, and a pallet 2 slides onto the chain 133. At the same time, the fifth limiting cylinder extends upward between two adjacent connecting parts 212 to limit the position of the next pallet 2. Repeat this operation to allow the empty pallets 2 to replace the workpieces in turn.

[0055] Reference Figure 4 and Figure 5 , temporary storage rack 31, transport rack 42, storage rack 51 (refer to Figure 6 ), and the return rack 61 are all connected with a sliding assembly 7. A group of sliding assemblies 7 include a placement rack 71, a transmission roller 72 and a limiting roller 73. The bottoms of multiple placement racks 71 are respectively fixedly connected to the top of the temporary storage rack 31, the top of the transport rack 42, the top of the storage rack 51, and the top of the return rack 61.

[0056] Reference Figure 5There are two groups of transmission rollers 72 arranged horizontally, and one group of transmission rollers 72 is provided with multiple transmission rollers. The multiple transmission rollers 72 are arranged at equal intervals along the length direction of the placement rack 71, and their axes are perpendicular to the length direction of the placement rack 71. The two groups of transmission rollers 72 are respectively close to both sides of the temporary storage rack 31, and are both rotatably connected to the side walls of the placement rack 71 that are close to each other.

[0057] When the tray 2 is placed on the temporary storage rack 31 , the transport rack 42 or the storage rack 51 , the transport rollers 72 cause the tray 2 to slide due to gravity.

[0058] Reference Figure 4 and Figure 5 There are two groups of limiting rollers 73 arranged horizontally, and one group of limiting rollers 73 is provided with multiple limiting rollers, which are arranged at equal intervals along the length direction of the placement rack 71. Their axes are perpendicular to the placement rack 71 and the transmission rollers 72. The two groups of limiting rollers 73 are respectively close to the two sides of the temporary storage rack 31, and are both rotatably connected to the top of the placement rack 71.

[0059] The limiting rollers 73 limit the position of the tray 2 to prevent the tray 2 from being offset, thereby preventing it from being separated from the temporary storage rack 31 , the transport rack 42 or the storage rack 51 .

[0060] The operating principle of this application is as follows: when the workpiece is processed and needs to be loaded, the robotic arm places the processed workpiece on the pallet 2 on the chain 133, and then the chain 133, sprocket 132 and motor 134 cooperate to transport the pallet 2 to the temporary storage rack 31. Multiple pallets 2 are temporarily stored on the temporary storage rack 31. The AGV car 41 drives the transport rack 42 to connect with the temporary storage rack 31. The pallets 2 on the temporary storage rack 31 are transported to the transport rack 42 in turn. The transport rack 42 is separated from the temporary storage rack 31. The AGV car 41 drives the transport rack 42 to connect with the storage rack 51 and transports the pallet 2 to the storage rack 51. The storage rack 51 temporarily stores the workpiece and transports the pallets 2 carrying the workpiece one by one to another set of chains 133. Another robotic arm then takes the workpiece in the pallet 2 on the chain 133 and places it in the next process, which greatly improves work efficiency.

[0061] The embodiments of this specific implementation method are all preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the scope of protection of the present invention.

Claims

1. An automatic workpiece transport mechanism, comprising a plurality of trays (2) for placing workpieces, an AGV vehicle (41), and a transport frame (42) connected to the AGV vehicle (41), characterized in that: It also includes two conveying devices (1) respectively placed at the end of a workpiece processing step and the beginning of a next step, a temporary storage device (3) provided near the conveying device (1) located at the end of the workpiece processing step, and a transition device (5) provided near the conveying device (1) located at the beginning of the next step; The pallet (2) is connected to the conveying device (1), the temporary storage device (3), the transport rack (42), and the transition device (5); when the transport rack (42) is in a loading state, one end of the transport rack (42) is connected to an end of the temporary storage device (3) away from the conveying device (1); when the transport rack (42) is in a discharging state, the other end of the transport rack (42) is connected to an end of the transition device (5) away from the conveying device (1); The height of one end of the transport rack (42) is greater than the height of the other end, and the lower end thereof is connected to a second limiting member. The temporary storage device (3) includes a temporary storage rack (31) for temporarily storing a plurality of the pallets (2) and a first limiting member for limiting the position of the pallets (2). The height of one end of the temporary storage rack (31) close to the conveying device (1) is greater than the height of the other end. The lower end thereof is connected to the higher end of the transport rack (42), and the minimum height thereof is equal to the maximum height of the transport rack (42). The temporary storage rack (31) and the transport rack (42) are both connected to a sliding assembly (7) for driving the pallets (2) to slide. The first limiting member is connected to the temporary storage rack (31) and is away from the conveying device (1). The transition device (5) includes a storage rack (51) for temporarily placing a plurality of the pallets (2) and a thrust assembly (52) for controlling the pallets (2) to stop. The storage rack (51) is arranged close to the conveying device (1). The height of one end of the storage rack (51) close to the next process is smaller than the height of the other end. The end with a larger height is connected to the end with a smaller height of the transport rack (42), and the maximum height is equal to the minimum height of the transport rack (42). The top of the storage rack (51) is connected to the sliding assembly (7). The thrust assembly (52) is connected to the storage rack (51) and close to the conveying device (1). The temporary storage rack (31), the transport rack (42), and the storage rack (51) are all connected to a return assembly (6) for placing the empty pallets (2), and the return assembly (6) includes a plurality of return racks (61) and a fourth position-limiting member for limiting the position of the pallets (2). The plurality of return racks (61) are respectively connected to the temporary storage rack (31), the transport rack (42), and the storage rack (51), and the height of one end thereof close to the starting point of the next process is greater than the height of the other end; The minimum height of the return rack (61) connected to the storage rack (51) is equal to the maximum height of the return rack (61) connected to the transport rack (42), the minimum height of the return rack (61) connected to the transport rack (42) is equal to the maximum height of the return rack (61) connected to the temporary storage rack (31), the fourth limiting member is fixedly connected to the end of the return rack (61) with a smaller height, the storage rack (51) is connected to a fifth limiting member near the end with a smaller height for limiting the next tray (2), and the return rack (61) is connected to the sliding assembly (7).

2. The automatic workpiece transport mechanism according to claim 1, characterized in that: The conveying device (1) comprises a base (11), a lifting platform (12) connected to the top of the base (11), and a conveying assembly (13) connected to the lifting platform (12); the tray (2) is connected to the conveying assembly (13).

3. The automatic workpiece transport mechanism according to claim 2, characterized in that: The conveying assembly (13) includes a conveying frame (131) connected to the top of the lifting platform (12), four sprockets (132) connected to the conveying frame (131), two chains (133) meshed with the sprockets (132), and a driving member connected to the conveying frame (131). The four sprockets (132) are arranged in groups of two, and the two groups of sprockets (132) are respectively located on both sides of the length direction of the conveying frame (131). The two groups of sprockets (132) are linked by two linkage rods (8), and the length direction of the linkage rods (8) is perpendicular to the sprockets (132). The driving member is connected to the two groups of sprockets (132), and one chain (133) is sleeved on one group of sprockets (132). The tray (2) is in contact with the chain (133).

4. The automatic workpiece transport mechanism according to claim 1, characterized in that: The thrust assembly (52) comprises a support frame (521) connected to the storage rack (51), a support column (522) connected to the support frame (521), a connecting rod (523) whose middle section is rotatably connected to the support column (522), a first thrust rod (524) rotatably connected to one end of the connecting rod (523), a second thrust rod (525) rotatably connected to the other end of the connecting rod (523), and a third cylinder (526) connected to the support frame (521), wherein a drive shaft of the third cylinder (526) is fixedly connected to the bottom of the first thrust rod (524).

5. The automatic workpiece transport mechanism according to claim 1, characterized in that: The sliding assembly (7) includes a placement rack (71) and a transmission roller (72) rotatably connected to a side wall close to the placement rack (71); the placement rack (71) is connected to the temporary storage rack (31), the transport rack (42) or the storage rack (51); two groups of transmission rollers (72) are provided, and the two groups of transmission rollers (72) are respectively close to the two sides of the temporary storage rack (31); a group of transmission rollers (72) is provided with a plurality of transmission rollers, and the plurality of transmission rollers (72) are arranged at equal intervals along the length direction of the placement rack (71), and their axes are perpendicular to the length direction of the placement rack (71).

6. The automatic workpiece transport mechanism according to claim 5, characterized in that: The sliding assembly (7) further comprises a limiting roller (73) rotatably connected to the top of the placement rack (71), wherein two groups of the limiting rollers (73) are horizontally arranged, and the two groups of limiting rollers (73) are respectively close to the two sides of the temporary storage rack (31), and a group of limiting rollers (73) is provided with a plurality of limiting rollers, and the plurality of limiting rollers (73) are arranged at equal intervals along the length direction of the placement rack (71), and their axes are perpendicular to the placement rack (71) and the transmission roller (72).

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