PU wheel assembly line and PU wheel assembly method

Abstract

The application discloses a PU wheel assembling production line and a PU wheel assembling method for the PU wheel assembling production line, wherein the PU wheel assembling production line comprises a machine table, a screw rod chassis feeding module, a bottom cover transfer module, a wheel transfer module, a surface cover transfer module, a pressing module, a nut locking module and a material returning module; one cycle of a single tray on a ring track can realize full-automatic feeding, assembling and discharging of the PU wheel on the tray, and effectively improves the efficiency; the clamping block on the machine table cooperates with the clamping groove of the tray, so that the tray can be stably fixed on a machining position, and the assembling accuracy is improved.

Description

Technical Field

[0001] This invention relates to the field of pulley assembly technology, and in particular to a PU wheel assembly production line and a PU wheel assembly method. Background Technology

[0002] Traditional PU pulley assembly and production mainly relies on manual operation, resulting in low production efficiency, unstable product quality, high labor intensity, and high production costs. With the continuous growth of market demand for PU pulley products and increasingly stringent quality requirements, traditional production methods are no longer sufficient to meet the needs of modern large-scale production. Summary of the Invention

[0003] This invention aims to at least solve one of the technical problems existing in the prior art. To this end, this invention proposes a PU wheel assembly production line that can assemble PU wheels fully automatically, thereby improving efficiency.

[0004] The present invention also proposes a PU wheel assembly method for the above-mentioned PU wheel assembly production line.

[0005] According to a first aspect of the present invention, a PU wheel assembly production line includes a machine base, a screw chassis loading module, a bottom cover transfer module, a wheel transfer module, a top cover transfer module, a pressing module, a nut locking module, and a retraction module. The machine base is equipped with a circular track, on which multiple trays are slidably connected. These trays are used to hold workpieces. Along the movement path of the trays, the machine base is sequentially equipped with a screw chassis loading station, a bottom cover transfer station, a wheel transfer station, a top cover transfer station, a pressing station, a top cover loading station, a nut locking station, and a retraction station. The screw chassis loading module is located on the circular track. A screw base loading module is located outside the circular track and at the screw base loading station. This module places the screw base onto the tray. A bottom cover transfer module is located outside the circular track and at the bottom cover transfer station. This module assembles the bottom cover onto the tray from the screw base loading module. A wheel transfer module is located outside the circular track and at the wheel transfer station. This module assembles the wheels onto the tray from the bottom cover transfer module. A top cover transfer module is located outside the circular track. Located at the cover transfer station, the cover transfer module is used to assemble the cover onto the tray from the wheel transfer module; the pressing module is located outside the annular track and at the pressing station, and is used to press the workpiece on the tray from the cover transfer module; the top cover loading module is located outside the annular track and at the top cover loading station, and is used to place the top cover onto the workpiece on the tray from the pressing module; the nut locking module is located outside the annular track and at the nut locking station, and is used to... A nut is fitted onto the workpiece from the pressing module tray and tightened; an ejection module is located outside the annular track and at the ejection station, used to eject the finished product from the nut locking module from the machine platform; wherein, the machine platform is provided with multiple liftable locking blocks, and the outside of the tray is provided with locking holes, the locking blocks can rise and engage with the locking holes, so that the tray is fixed at the screw base loading station, the bottom cover transfer station, the wheel transfer station, the top cover transfer station, the pressing station, the top cover loading station, the nut locking station, or the ejection station.

[0006] The PU wheel assembly line according to embodiments of the present invention has at least the following beneficial effects:

[0007] 1. A single pallet can automatically feed, assemble, and unload PU wheels on the pallet by circulating once on the circular track, effectively improving efficiency.

[0008] 2. By using the clamping blocks on the machine tool in conjunction with the clamping holes of the tray, the tray can be stably fixed in the processing position, improving the accuracy of assembly.

[0009] According to some embodiments of the present invention, the bottom cover transfer module, the wheel transfer module, and the top cover transfer module all include a loading mechanism. The loading mechanism includes a base, a turntable, a first guide rod, a lifting mechanism, a horizontal guide rail, and a first pneumatic gripper. The base is fixed to the ground. The turntable is pivotally mounted on the surface of the base, and multiple loading platforms are equidistantly arranged around the outer side of the turntable. The first guide rod is fixed on the turntable and is arranged vertically. The first guide rod is used to fit the bottom cover, wheel, or top cover. In a single loading platform, at least one first guide rod is provided. The lifting mechanism is vertically mounted on the base and is located on one side of the turntable. The lifting mechanism is provided with a slot. The turntable can rotate to allow one of the loading platforms and the lifting mechanism to connect. The positions of the components correspond, and the corresponding loading platform can be embedded in the slot. The lifting mechanism is used to lift the bottom cover, wheel, or top cover sleeved on the first guide rod. The horizontal guide rail is fixed above the base and located above the first guide rod. The horizontal guide rail is slidably connected to a horizontal slider. Along the direction of the horizontal guide rail, the horizontal slider is configured to move between a first position and a second position. The first pneumatic gripper is fixedly connected to the horizontal slider. When the first pneumatic gripper is located at the first position, the first pneumatic gripper is located above the lifting mechanism and is used to grip the bottom cover, wheel, or top cover sleeved on the first guide rod. When the first pneumatic gripper moves from the first position to the second position, the first pneumatic gripper moves toward the bottom cover transfer station, the wheel transfer station, or the top cover transfer station.

[0010] According to some embodiments of the present invention, two loading platforms are grouped together, and the turntable is rotatable so that one group of loading platforms and the lifting mechanism are correspondingly arranged. The lifting mechanism is provided with two slots, and the slots correspond one-to-one with the loading platforms. Two first pneumatic grippers are provided, and the two first pneumatic grippers correspond one-to-one with the two slots. The horizontal slider is fixedly connected to a first connecting plate, which is perpendicular to the moving direction of the horizontal slider. A drive cylinder is fixedly connected to the end of the first connecting plate away from the horizontal slider. A second connecting plate is fixedly connected to the driving end of the drive cylinder. The first pneumatic grippers are fixedly connected to both ends of the second connecting plate.

[0011] According to some embodiments of the present invention, along the length direction of the first guide rod, the lifting mechanism is configured to move between a loading position and a reset position. When the lifting mechanism is located at the loading position, it is below the turntable. The lifting mechanism is provided with a drive mechanism for driving the lifting mechanism to rise and fall. The base is fixed with a frame, and a first proximity sensor is provided above the frame. The first proximity sensor is electrically connected to the drive mechanism. When the lifting mechanism moves to the reset position, it can trigger the first proximity sensor to engage and control the drive mechanism through the first proximity sensor, so that the lifting mechanism descends from the reset position to the loading position. A second proximity sensor is provided below the frame, and the second proximity sensor is electrically connected to a servo motor for controlling the rotation of the turntable. When the lifting mechanism moves from the reset position to the loading position, it can trigger the second proximity sensor and control the servo motor through the second proximity sensor.

[0012] According to some embodiments of the present invention, the lifting mechanism includes a second guide rod, a lifting block, and a linkage plate. The second guide rod is vertically fixed on the base and located on one side of the turntable. The lifting block is slidably connected to the second guide rod and can slide along the length direction of the second guide rod. The lifting block is provided with a slot on the side facing the turntable, and the lifting block and the material loading platform are correspondingly arranged. The linkage plate is fixedly connected to the lifting block, and one end of the linkage plate is fixedly connected to the driving mechanism. The driving mechanism includes a driving pulley, a driven pulley, and a transmission belt. A moving block is fixedly connected to the transmission belt. One end of the linkage plate is fixedly connected to the moving block. The transmission belt is wound between the driving pulley and the driven pulley and is arranged in a vertical direction. Both the driving pulley and the driven pulley can be pivotally mounted on the base. The driving pulley is connected to a stepper motor for driving the driving pulley to rotate.

[0013] According to some embodiments of the present invention, the bottom cover transfer module, the wheel transfer module and the top cover transfer module further include a conveyor belt, the conveyor belt is fixed on the machine base, one end of the conveyor belt is close to the feeding mechanism and the other end is close to the annular track, wherein when the first pneumatic gripper is in the second position, the first pneumatic gripper is located above the conveyor belt.

[0014] According to some embodiments of the present invention, the screw chassis loading module includes an inclined rail and a second gripper. The inclined rail is disposed outside the annular rail and slopes downward from one end away from the annular rail toward the end closer to the annular rail. The lowest end of the inclined rail is provided with a horizontally arranged positioning groove. The second gripper is used to grip the screw chassis embedded in the positioning groove. The second gripper can move laterally on the machine platform to move the screw chassis from the positioning groove onto the tray.

[0015] According to some embodiments of the present invention, the pressing module includes positioning blocks, telescopic cylinders, pressing cylinders, and lifting cylinders. Two positioning blocks are provided, symmetrically arranged on both sides of the annular track and corresponding to the tray. A locking groove is provided on the opposite side of each positioning block. The telescopic cylinder is fixedly connected to the positioning blocks and is used to drive the positioning blocks to move, causing the two positioning blocks to move away from or towards each other. An clearance hole is provided in the middle of the pressing cylinder, into which the screw base plate extends. The pressing cylinder is located above the pressing station. The lifting cylinder is fixedly connected to the top end of the pressing cylinder and is used to drive the pressing cylinder to move up and down.

[0016] According to some embodiments of the present invention, the top cover feeding module includes a first spiral vibratory feeder, a first conveying track, and a third gripper. The first spiral vibratory feeder is used to convey the top cover. One end of the first conveying track is connected to the discharge end of the first spiral vibratory feeder, and the other end is provided with a limiting groove, which is used to constrain the position of the top cover. The third gripper is used to grip the top cover on the first conveying track. The third gripper can move laterally on the machine platform to move the top cover located in the limiting groove onto the tray.

[0017] A PU wheel assembly method according to a second aspect of the present invention, used to control a PU wheel assembly production line according to a first aspect of the present invention, includes the following steps:

[0018] Step 1: The pallet is moved to the screw base loading station, and the screw base loading module places the screw base onto the pallet;

[0019] Step 2: The pallet is moved to the bottom cover transfer station, and the bottom cover is placed onto the screw base by the bottom cover transfer module;

[0020] Step 3: The pallet is moved to the wheel transfer station, and the wheel transfer module places the wheels on the bottom cover;

[0021] Step 4: The pallet is moved to the cover transfer station, and the cover transfer module places the cover onto the wheels;

[0022] Step 5: The pallet is moved to the pressing station, and the pressing module presses the screw base, bottom cover, wheels and top cover on the pallet together;

[0023] Step 6: The pallet is moved to the top cover loading station, and the top cover loading module places the top cover onto the workpiece from the pallet of the pressing module;

[0024] Step 7: The pallet moves to the nut locking station, and the nut locking module puts the nut onto the end of the screw base and tightens it;

[0025] Step 8: The pallet is moved to the unloading station, and the unloading module pushes the finished products off the pallet for collection;

[0026] Step 9: Repeat steps 1 through 8.

[0027] The PU wheel assembly method according to embodiments of the present invention has at least the following beneficial effects:

[0028] 1. A single pallet can automatically feed, assemble, and unload PU wheels on the pallet by circulating once on the circular track, effectively improving efficiency.

[0029] 2. By using the clamping blocks on the machine tool in conjunction with the clamping holes of the tray, the tray can be stably fixed in the processing position, improving the accuracy of assembly.

[0030] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0031] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0032] Figure 1 This is a schematic diagram of a PU wheel assembly production line according to an embodiment of the present invention;

[0033] Figure 2 This is a schematic diagram of the feeding mechanism according to an embodiment of the present invention;

[0034] Figure 3 This is a schematic diagram of the feeding mechanism (without the first guide rod and conveyor belt) in one direction according to an embodiment of the present invention;

[0035] Figure 4 This is a schematic diagram of the feeding mechanism (without the first guide rod and conveyor belt) according to another embodiment of the present invention;

[0036] Figure 5 This is a schematic diagram of the screw chassis feeding module according to an embodiment of the present invention;

[0037] Figure 6This is a schematic diagram of the pressing module according to an embodiment of the present invention;

[0038] Figure 7 This is a schematic diagram of the top cover feeding module according to an embodiment of the present invention;

[0039] Figure 8 This is a schematic diagram of the nut locking module according to an embodiment of the present invention;

[0040] Figure 9 This is a schematic diagram of the unloading module according to an embodiment of the present invention;

[0041] Figure 10 This is a schematic diagram of a tray according to an embodiment of the present invention.

[0042] 100. Machine base; 110. Circular track; 120. Tray; 121. Magnet; 122. Receiving slot; 130. Locking block; 131. Locking hole;

[0043] 101. Screw chassis loading station; 102. Bottom cover transfer station; 103. Wheel transfer station; 104. Top cover transfer station; 105. Pressing station; 106. Top cover loading station; 107. Nut tightening station; 108. Unloading station;

[0044] 200. Screw base loading module; 210. Inclined track; 211. Positioning slot; 220. Second gripper;

[0045] 300. Bottom cover transfer module;

[0046] 400. Wheel transfer module;

[0047] 500, Cover Transfer Module;

[0048] 600, Pressing module; 610, Positioning block; 611, Locking slot; 620, Telescopic cylinder; 630, Pressing cylinder; 631, Clearance hole; 640, Lifting cylinder;

[0049] 700. Top cover feeding module; 710. First spiral vibratory feeder; 720. First conveying track; 721. Limiting groove; 730. Third gripper;

[0050] 800. Nut locking module; 810. Second spiral vibratory feeder; 820. Second conveying track; 830. Push block; 831. Groove; 840. Pneumatic screwdriver;

[0051] 900. Unloading module; 910. Unloading block; 911. Unloading cylinder; 920. Conveyor belt;

[0052] 1000. Feeding mechanism; 1010. Base; 1020. Turntable; 1021. Loading platform; 1030. First guide rod; 1040. Lifting mechanism; 1041. Second guide rod; 1042. Lifting block; 10421. Slot; 1043. Linkage plate; 1044. Drive mechanism; 10441. Driving pulley; 10442. Driven pulley; 10443. Transmission belt; 10444. Moving block; 1050. Horizontal guide rail; 1051. Horizontal slider; 1052. First connecting plate; 1053. Drive cylinder; 1060. First pneumatic gripper; 1070. Frame; 1071. First proximity sensor; 1072. Second proximity sensor; 1080. Conveyor belt; Detailed Implementation

[0053] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0054] In the description of this invention, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0055] In the description of this invention, "several" means one or more, "more than" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0056] In the description of this invention, unless otherwise explicitly defined, terms such as "set up," "install," and "connect" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this invention in conjunction with the specific content of the technical solution.

[0057] Reference Figures 1 to 10The PU wheel assembly production line of the first aspect of the present invention includes a machine base 100, a screw chassis loading module 200, a bottom cover transfer module 300, a wheel transfer module 400, a top cover transfer module 500, a pressing module 600, a nut locking module 800, and a material unloading module 900. The machine base 100 is provided with a circular track 110, and multiple trays 120 are slidably connected to the circular track 110. The trays 120 are used to hold workpieces. Along the moving path of the trays 120, the machine base 100 is sequentially provided with a screw chassis loading station 101, a bottom cover transfer station 102, a wheel transfer station 103, a top cover transfer station 104, a pressing station 105, a top cover loading station 106, and a nut locking station 107. The screw base loading module 200 is located outside the annular track 110 and at the screw base loading station 101. The screw base loading module 200 is used to place the screw base onto the tray 120. The bottom cover transfer module 300 is located outside the annular track 110 and at the bottom cover transfer station 102. The bottom cover transfer module 300 is used to assemble the bottom cover onto the tray 120 from the screw base loading module 200. The wheel transfer module 400 is located outside the annular track 110 and at the wheel transfer station 103. The wheel transfer module 400 is used to assemble the wheels onto the tray 120 from the bottom cover transfer module. The top cover transfer module 500 is located on the annular track. Outside the ring track 110 and located at the cover transfer station 104, the cover transfer module 500 is used to assemble the cover onto the tray 120 from the wheel transfer module 400; the pressing module 600 is located outside the ring track 110 and located at the pressing station 105, and is used to press the workpiece on the tray 120 from the cover transfer module 500; the top cover loading module 700 is located outside the ring track 110 and located at the top cover loading station 106, and is used to fit the top cover onto the workpiece on the tray 120 from the pressing module 600; the nut locking module 800 is located outside the ring track 110 and located at the nut locking station 107, and is used to lock the nut onto the workpiece on the tray 120 from the pressing module 600. Group 800 is used to fit the nut onto the workpiece from the pressing module 600 tray 120 and tighten it; the unloading module 900 is set outside the annular track 110 and located at the unloading station 108, and is used to push the finished product from the nut locking module 800 out of the machine platform 100; wherein, the machine platform 100 is provided with multiple liftable locking blocks 130, and the outside of the tray 120 is provided with locking holes 131. The locking blocks 130 can rise and lock into the locking holes 131, so that the tray 120 is fixed at the screw base loading station 101, bottom cover transfer station 102, wheel transfer station 103, top cover transfer station 104, pressing station 105, top cover loading station 106, nut locking station 107 or unloading station 108.

[0058] Multiple pallets 120 circulate on the circular track 110, with each pallet 120 passing through various processing stations in sequence. When a pallet 120 reaches a processing station, a locking block 130 on the machine tool 100 automatically rises and engages with the locking hole 131 of the pallet 120. After the pallet 120 is precisely positioned, the processing module at the corresponding processing station begins to perform the corresponding assembly operation. After the operation is completed, the locking block 130 descends, and the pallet 120 continues to move to the next processing station. Specifically, the circular track 110 has multiple pallets 120, enabling continuous assembly line operation throughout the entire process, with multiple pallets 120 being processed simultaneously at different processing stations.

[0059] The PU wheel assembly production line of this invention includes the following PU wheel assembly method, comprising the following steps:

[0060] Step 1: The pallet 120 is moved to the screw base loading station 101, and the screw base loading module 200 places the screw base onto the pallet 120;

[0061] Step 2: The pallet 120 moves to the bottom cover transfer station 102, and the bottom cover transfer module 300 places the bottom cover onto the screw base plate;

[0062] Step 3: The pallet 120 is moved to the wheel transfer station 103, and the wheel transfer module 400 places the wheels on the bottom cover;

[0063] Step 4: The pallet 120 moves to the cover transfer station 104, and the cover transfer module 500 places the cover onto the wheels;

[0064] Step 5: The tray 120 is moved to the pressing station 105, and the pressing module 600 presses the screw base, bottom cover, wheels and top cover on the tray 120.

[0065] Step 6: The pallet 120 moves to the top cover loading station 106, and the top cover loading module 700 places the top cover onto the workpiece from the pallet of the pressing module 600.

[0066] Step 7: The tray 120 moves to the nut locking station 107, and the nut locking module 800 puts the nut onto the end of the screw base and tightens it;

[0067] Step 8: The pallet 120 is moved to the unloading station 108, and the unloading module 900 pushes the finished product out of the pallet 120 for collection;

[0068] Step 9: Repeat steps 1 through 8.

[0069] In summary, in the embodiments of the present invention, a single tray 120 can achieve fully automatic feeding, assembly and unloading of PU wheels on the tray 120 by circulating once on the circular track 110, which effectively improves efficiency; by using the locking block 130 on the machine tool 100 in conjunction with the locking slot 10421 of the tray 120, the tray 120 can be stably fixed in the processing position, which improves the accuracy of assembly.

[0070] In some embodiments, refer to Figure 10 The tray 120 is provided with a receiving groove 122, which fits perfectly into the screw base. A magnet 121 is fixed in the middle of the receiving groove 122. The screw base is placed into the receiving groove 122 of the tray 120, and the shape of the receiving groove 122 precisely matches the base. The magnet 121 firmly attracts the iron screw base to the bottom of the receiving groove 122. During assembly, the magnet 121 ensures that the base will not move or tilt, improving the stability of the screw base during assembly and preventing the screw base from shifting its position during movement or assembly.

[0071] In some embodiments, refer to Figure 1 and Figure 2The bottom cover transfer module 300, wheel transfer module 400, and top cover transfer module 500 all include a loading mechanism 1000. The loading mechanism 1000 includes a base 1010, a turntable 1020, a first guide rod 1030, a lifting mechanism 1040, a horizontal guide rail 1050, and a first pneumatic gripper 1060. The base 1010 is fixed to the ground. The turntable 1020 is pivotally mounted on the surface of the base 1010. Multiple loading platforms 102 are equidistantly arranged around the outer side of the turntable 1020. 1; The first guide rod 1030 is fixed on the turntable 1020. The first guide rod 1030 is arranged vertically and is used to fit the bottom cover, wheels, or top cover. In a single loading platform 1021, at least one first guide rod 1030 is provided; The lifting mechanism 1040 is vertically mounted on the base 1010 and is located on one side of the turntable 1020. The lifting mechanism 1040 is provided with a slot 10421. The turntable 1020 can rotate to allow one of the... The loading platform 1021 and the lifting mechanism 1040 are positioned correspondingly, and the corresponding loading platform 1021 can be inserted into the slot 10421. The lifting mechanism 1040 is used to lift the bottom cover, wheels, or top cover sleeved on the first guide rod 1030. The horizontal guide rail 1050 is fixed above the base 1010 and located above the first guide rod 1030. The horizontal guide rail 1050 is slidably connected to a horizontal slider 1051. Along the direction of the horizontal guide rail 1050, the horizontal slider 1051 is configured at a first position and a second position. The first pneumatic gripper 1060 is fixedly connected to the horizontal slider 1051. When the first pneumatic gripper 1060 is in the first position, it is located above the lifting mechanism 1040 and is used to grip the bottom cover, wheel, or top cover sleeved on the first guide rod 1030. When the first pneumatic gripper 1060 moves from the first position to the second position, it moves toward the bottom cover transfer station 102, the wheel transfer station 103, or the top cover transfer station 104.

[0072] Step 1: The bottom cover, wheels, or top cover are fitted onto the first guide rod 1030, and multiple material loading platforms 1021 are distributed around the turntable 1020;

[0073] Step 2: The turntable 1020 rotates, moving the loading platform 1021, which carries the workpiece (bottom cover, wheels, or top cover), to the lifting mechanism 1040 position;

[0074] Step 3: The lifting mechanism 1040 rises, lifting the bottommost workpiece off the guide rod;

[0075] Step 4: The first pneumatic gripper 1060 moves along the horizontal guide rail 1050 to the first position and is located above the lifting mechanism 1040 to grip the lifted workpiece at the top.

[0076] During the above-mentioned work process, automatic feeding and precise transfer of workpieces are achieved. The slot 10421 can avoid the material loading platform 1021 and lift the workpiece mounted on the first guide rod 1030.

[0077] Furthermore, referring to Figure 3 and Figure 4 Along the length of the first guide rod 1030, the lifting mechanism 1040 is configured to move between a loading position and a reset position. When the lifting mechanism 1040 is in the loading position, it is located below the turntable 1020. The lifting mechanism 1040 is equipped with a drive mechanism 1044, which is used to drive the lifting mechanism 1040 to lift. The base 1010 fixes the frame 1070, and a first proximity sensor 1071 is provided above the frame 1070. The first proximity sensor 1071 is electrically connected to the drive mechanism 1044. When the lifting mechanism 1040 moves to the reset position... The lifting mechanism 1040 can trigger the first proximity sensor 1071 to cooperate and control the drive mechanism 1044 through the first proximity sensor 1071, so that the lifting mechanism 1040 descends from the reset position to the loading position; a second proximity sensor 1072 is provided below the frame 1070, and the second proximity sensor 1072 is electrically connected to a servo motor for controlling the rotation of the turntable 1020. When the lifting mechanism 1040 moves from the reset position to the loading position, the lifting mechanism 1040 can trigger the second proximity sensor 1072 and control the servo motor through the second proximity sensor 1072.

[0078] During the reciprocating motion between the "reset position" and the "loading position," the lifting mechanism 1040 resets itself and controls the turntable 1020. When the lifting mechanism 1040 rises to the reset position, it triggers the first proximity sensor 1071, which controls the drive mechanism 1044 to lower the lifting mechanism 1040 to the loading position. At this point, only one set of workpieces remains to be lifted by the lifting mechanism 1040. After being gripped by the first pneumatic gripper 1060, the lifting mechanism 1040 needs to descend to the loading position to wait for the workpieces of the new set of loading platforms 1021 to move above the lifting mechanism 1040. During the descent of the lifting mechanism 1040, the second proximity sensor 1072 is triggered, which controls the servo motor to rotate the turntable 1020, rotating the next set of loading platforms 1021 to the position corresponding to the lifting mechanism 1040. Specifically, the servo motor can achieve precise control of the rotation angle, improving the accuracy of the workstation switching.

[0079] In some embodiments, refer to Figure 3 and Figure 4Two loading platforms 1021 are arranged as a group, and the turntable 1020 can rotate so that one group of loading platforms 1021 is correspondingly set with the lifting mechanism 1040. The lifting mechanism 1040 is provided with two slots 10421, and the slots 10421 correspond one-to-one with the loading platforms 1021. There are two first pneumatic grippers 1060, and the two first pneumatic grippers 1060 correspond one-to-one with the two slots 10421. Among them, the horizontal slider 1051 is fixedly connected to the first connecting plate 1052, and the first connecting plate 1052 is perpendicular to the moving direction of the horizontal slider 1051. The end of the first connecting plate 1052 away from the horizontal slider 1051 is fixedly connected to the driving cylinder 1053, and the driving end of the driving cylinder 1053 is fixedly connected to the second connecting plate. The two ends of the second connecting plate are respectively fixedly connected to the first pneumatic grippers 1060.

[0080] The turntable 1020 rotates, moving a set of two material-carrying platforms 1021 to the position of the lifting mechanism 1040. The two slots 10421 of the lifting mechanism 1040 simultaneously engage with the two material-carrying platforms 1021, simultaneously lifting the two workpieces. The two first pneumatic grippers 1060 descend simultaneously, respectively gripping the two lifted workpieces, thereby improving the overall utilization rate of the equipment.

[0081] In some embodiments, refer to Figure 3 and Figure 4 The lifting mechanism 1040 includes a second guide rod 1041, a lifting block 1042, and a linkage plate 1043. The second guide rod 1041 is vertically fixed on the base 1010 and located on one side of the turntable 1020. The lifting block 1042 is slidably connected to the second guide rod 1041 and can slide along the length of the second guide rod 1041. A slot 10421 is provided on the side of the lifting block 1042 facing the turntable 1020. The lifting block 1042 and the loading platform 1021 are correspondingly arranged. The linkage plate 1043 is fixedly connected to the lifting block 1042, and one end of the linkage plate 1043 is fixedly connected to the drive mechanism 1044. The drive mechanism 1044 includes a driving pulley 10441, a driven pulley 10442, and a transmission belt 10443. A movable block 10444 is fixedly connected to a belt 10443. One end of the linkage plate 1043 is fixedly connected to the movable block 10444. The transmission belt 10443 is wound between the driving pulley 10441 and the driven pulley 10442. The transmission belt 10443 is arranged in a vertical direction. Both the driving pulley 10441 and the driven pulley 10442 can be pivotally mounted on the base 1010. The driving pulley 10441 is connected to a stepper motor for driving the driving pulley 10441 to rotate.

[0082] A stepper motor drives the active pulley 10441 to rotate, which in turn drives the driven pulley 10442 via the transmission belt 10443. The rotation of the transmission belt 10443 causes the moving block 10444 to move up and down, converting the rotational motion into linear motion. The linkage plate 1043 transmits the motion of the moving block 10444 to the lifting block 1042, causing it to slide up and down along the second guide rod 1041. During the above-mentioned operation, the slot 10421 on the lifting block 1042 precisely engages with the loading platform 1021 to achieve stable lifting of the workpiece and avoid motion interference. The precise control of the stepper motor ensures the accurate positioning of the lifting block 1042.

[0083] As a further optimization of the above embodiments, refer to Figure 2 The bottom cover transfer module 300, wheel transfer module 400, and top cover transfer module 500 also include a conveyor belt 1080, which is fixed on the machine base 100. One end of the conveyor belt 1080 is close to the feeding mechanism 1000, and the other end is close to the circular track 110. When the first pneumatic gripper 1060 is in the second position, it is located above the conveyor belt 1080. After the first pneumatic gripper 1060 picks up the workpiece from the lifting mechanism 1040, it moves it above the conveyor belt 1080, and the workpiece is placed on the conveyor belt 1080 for transport. Specifically, at the end of the conveyor belt 1080, a fourth pneumatic gripper is also provided, which moves between the end of the conveyor belt 1080 and the tray 120. The fourth pneumatic gripper is used to move the workpiece at the end of the conveyor belt 1080 to the tray 120 and assemble it with the original workpiece on the tray 120.

[0084] In some embodiments, refer to Figure 5 The screw chassis loading module 200 includes an inclined rail 210 and a second gripper 220. The inclined rail 210 is located outside the annular rail 110. The inclined rail 210 slopes downward from the end away from the annular rail 110 toward the end closer to the annular rail 110. The lowest end of the inclined rail 210 is provided with a horizontally arranged positioning groove 211. The second gripper 220 is used to grip the screw chassis embedded in the positioning groove 211. The second gripper 220 can move laterally on the machine base 100 to move the screw chassis from the positioning groove 211 to the tray 120. Under the action of gravity, the screw base automatically slides down the inclined track 210 and slides into the horizontal positioning groove 211 to achieve precise positioning. The second gripper 220 moves above the positioning groove 211, picks up the screw base, and moves it horizontally to the tray 120, where it is precisely placed on the tray 120 and attracted to the magnet 121 on the base, thus realizing automatic feeding and positioning of the screw base.

[0085] In some embodiments, refer to Figure 6The pressing module 600 includes a positioning block 610, a telescopic cylinder 620, a pressing cylinder 630, and a lifting cylinder 640. Two positioning blocks 610 are provided, symmetrically arranged on both sides of the annular track 110 and corresponding to the tray 120. A locking groove 611 is provided on the opposite side of each positioning block 610. The telescopic cylinder 620 is fixedly connected to the positioning block 610 and is used to drive the positioning block 610 to move, causing the two positioning blocks 610 to move away from or towards each other. A clearance hole 631 is provided in the middle of the pressing cylinder 630, into which the screw base plate extends. The pressing cylinder 630 is located above the pressing station 105. The lifting cylinder 640 is fixedly connected to the top of the pressing cylinder 630 and is used to drive the pressing cylinder 630 to move up and down. After the pallet 120 reaches the pressing station 105, the two positioning blocks 610 move towards the center under the drive of the telescopic cylinder 620. The locking grooves 611 of the positioning blocks 610 engage with the side of the pallet 120 or the workpiece to achieve precise lateral positioning. The lifting cylinder 640 drives the pressing cylinder 630 to descend, aligning it with the workpiece. The pressing cylinder 630 presses the various components of the workpiece together to ensure a tight fit. After pressing is completed, the pressing cylinder 630 rises, the positioning blocks 610 retract, and the pallet 120 continues to move. Three-dimensional positioning is achieved through lateral positioning and axial pressing, ensuring a tight fit between the components and improving the structural strength and stability of the product.

[0086] In some embodiments, refer to Figure 7 The top cover loading module 700 includes a first spiral vibratory feeder 710, a first conveying track, and a third gripper 730. The first spiral vibratory feeder 710 is used to convey the top cover. One end of the first conveying track 720 is connected to the discharge end of the first spiral vibratory feeder 710, and the other end is provided with a limiting groove 721, which is used to constrain the position of the top cover. The third gripper 730 is used to grip the top cover on the first conveying track 720. The third gripper 730 can move laterally on the machine base 100 to move the top cover located in the limiting groove 721 to the tray 120. The first spiral vibratory feeder 710 sorts the top covers in a certain direction through vibration. The sorted top covers rise along the spiral track and enter the first conveying track 720. The top covers are conveyed into the limiting groove 721 to achieve precise positioning. The third gripper 730 grips the top cover in the limiting groove 721 and moves it laterally above the tray 120 to accurately place the top cover at the designated position of the workpiece.

[0087] In some embodiments, refer to Figure 8The nut locking module 800 includes a second spiral vibratory plate 810, a second conveying track 820, a pusher block 830, and a pneumatic screwdriver 840. The second spiral vibratory plate 810 is used to convey nuts. One end of the second conveying track 820 is connected to the discharge end of the second spiral vibratory plate 810, and the other end is located on one side of the tray 120. One end of the pusher block 830 is connected to a pusher cylinder, and the other end is provided with a groove 831 for the nut to be embedded. The pneumatic screwdriver 840 is vertically mounted on the machine base 100 and is located above the nut locking station 107. The pusher cylinder can drive the pusher block 830 to push the nut between the pneumatic screwdriver 840 and the workpiece. The second spiral vibratory plate 810 sorts the nuts and transports them to the second conveying track 820. The nuts are transported along the second conveying track 820 to the pusher block 830. The groove 831 of the pusher block 830 accurately positions the nuts. The cylinder drives the pusher block 830 to push the nuts to the end of the screw base 1010. The pneumatic screwdriver 840 descends and tightens the nuts on the screw base 1010.

[0088] In some embodiments, refer to Figure 9 The unloading module 900 includes an unloading block 910 and a conveyor belt 920. The unloading block 910 is located inside the circular track 110, and the unloading block 910 and the conveyor belt 920 are located on both sides of the circular track 110 and are arranged opposite each other. The unloading block 910 is fixedly connected to an unloading cylinder 911, which pushes the finished product onto the conveyor belt 920. The assembled finished product arrives at the unloading station 108 with the pallet 120. The clamping block 130 rises to fix the position of the pallet 120, and the unloading cylinder 911 drives the unloading block 910 to push the finished product off the pallet 120. The finished product is pushed onto the conveyor belt 920 and transported away for collection. The empty pallet 120 continues to circulate on the circular track 110, ready for the next assembly. This realizes automatic unloading and collection of finished products, ensures reliable separation of finished products from the pallet 120, and realizes the recycling of the pallet 120.

[0089] In summary, this PU wheel assembly production line achieves fully automated production of PU wheels through a 110-ring conveyor system and multi-station parallel operation. The various modules work collaboratively, forming a complete automated production process from screw chassis feeding, bottom cover assembly, wheel installation, top cover assembly, pressing, top cover installation to nut tightening and finished product unloading.

[0090] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. A PU wheel assembly production line, characterized in that, include: The machine is equipped with a circular track, on which multiple trays are slidably connected. The trays are used to hold workpieces. Along the moving path of the trays, the machine is sequentially equipped with a screw base loading station, a bottom cover transfer station, a wheel transfer station, a top cover transfer station, a pressing station, a top cover loading station, a nut locking station, and a material unloading station. A screw chassis loading module is disposed on the outside of the annular track and located at the screw chassis loading station. The screw chassis loading module is used to place the screw chassis on the tray. A bottom cover transfer module is disposed on the outside of the annular track and located at the bottom cover transfer station. The bottom cover transfer module is used to assemble the bottom cover onto the tray from the screw chassis loading module. A wheel transfer module is disposed on the outside of the circular track and located at the wheel transfer station. The wheel transfer module is used to assemble the wheel onto the tray from the bottom cover transfer module. A face cover transfer module is disposed on the outside of the annular track and located at the face cover transfer station. The face cover transfer module is used to assemble the face cover onto the tray from the wheel transfer module. A pressing module is disposed outside the annular track and located at the pressing station. The pressing module is used to press the workpiece from the tray of the cover transfer module. A top cover loading module is disposed outside the annular track and located at the top cover loading station. The top cover loading module is used to place the top cover onto the workpiece from the tray of the pressing module. A nut locking module is disposed on the outside of the annular track and located at the nut locking station. The nut locking module is used to fit the nut onto the workpiece from the top cover feeding module and tighten it. The unloading module is located outside the annular track and at the unloading station, and is used to push the finished product from the nut locking module out of the machine. The machine is equipped with multiple liftable locking blocks, and the outer side of the tray is provided with locking holes. The locking blocks can rise and lock into the locking holes to fix the tray to the screw base loading station, the bottom cover transfer station, the wheel transfer station, the top cover transfer station, the pressing station, the top cover loading station, the nut locking station, or the unloading station.

2. The PU wheel assembly production line according to claim 1, characterized in that, The bottom cover transfer module, the wheel transfer module, and the top cover transfer module all include a feeding mechanism, which includes: The base is fixed to the ground; A turntable is pivotally mounted on the surface of the base, and multiple material-carrying platforms are arranged equidistantly around the outer side of the turntable. A first guide rod is fixed on the turntable. The first guide rod is arranged in a vertical direction and is used to fit a bottom cover, wheel, or top cover. In a single material loading platform, at least one first guide rod is provided. A lifting mechanism is mounted vertically on the base. The lifting mechanism is located on one side of the turntable and has a slot. The turntable can rotate so that one of the material loading platforms corresponds to the lifting mechanism and the corresponding material loading platform can be inserted into the slot. The lifting mechanism is used to lift the bottom cover, wheel, or top cover sleeved on the first guide rod. A horizontal guide rail is fixed above the base and located above the first guide rod. A horizontal slider is slidably connected to the horizontal guide rail. The horizontal slider is configured to move between a first position and a second position along the direction of the horizontal guide rail. The first pneumatic gripper is fixedly connected to the horizontal slider. When the first pneumatic gripper is in the first position, it is located above the lifting mechanism and is used to grip the bottom cover, wheel, or top cover sleeved on the first guide rod. When the first pneumatic gripper moves from the first position to the second position, it moves toward the bottom cover transfer station, the wheel transfer station, or the top cover transfer station.

3. The PU wheel assembly production line according to claim 2, characterized in that, The two loading platforms are grouped together, and the turntable can rotate so that one group of loading platforms and the lifting mechanism are correspondingly set. The lifting mechanism is provided with two slots, and the slots correspond one-to-one with the loading platforms. There are two first pneumatic grippers, and the two first pneumatic grippers correspond one-to-one with the two slots. The horizontal slider is fixedly connected to a first connecting plate, which is perpendicular to the moving direction of the horizontal slider. A driving cylinder is fixedly connected to the end of the first connecting plate away from the horizontal slider. A second connecting plate is fixedly connected to the driving end of the driving cylinder. The first pneumatic gripper is fixedly connected to both ends of the second connecting plate.

4. The PU wheel assembly production line according to claim 2, characterized in that, Along the length of the first guide rod, the lifting mechanism is configured to move between a loading position and a reset position. When the lifting mechanism is in the loading position, it is located below the turntable. The lifting mechanism is provided with a driving mechanism for driving the lifting mechanism to rise and fall. The base is fixed with a frame, and a first proximity sensor is provided above the frame. The first proximity sensor is electrically connected to the drive mechanism. When the lifting mechanism moves to the reset position, the lifting mechanism can trigger the first proximity sensor to cooperate and control the drive mechanism through the first proximity sensor so that the lifting mechanism descends from the reset position to the loading position. A second proximity sensor is provided below the frame. The second proximity sensor is electrically connected to a servo motor for controlling the rotation of the turntable. When the lifting mechanism moves from the reset position to the loading position, the lifting mechanism can trigger the second proximity sensor and control the servo motor through the second proximity sensor.

5. The PU wheel assembly production line according to claim 4, characterized in that, The lifting mechanism includes: The second guide rod is vertically fixed to the base and located on one side of the turntable; The lifting block is slidably connected to the second guide rod. The lifting block can slide along the length direction of the second guide rod. The side of the lifting block facing the turntable is provided with the slot. The lifting block and the loading platform are correspondingly arranged. A linkage plate is fixedly connected to the lifting block, and one end of the linkage plate is fixedly connected to the drive mechanism. The driving mechanism includes a driving pulley, a driven pulley, and a transmission belt. A movable block is fixedly connected to the transmission belt. One end of the linkage plate is fixedly connected to the movable block. The transmission belt is wound between the driving pulley and the driven pulley. The transmission belt is arranged in a vertical direction. Both the driving pulley and the driven pulley can be pivotally mounted on the base. The driving pulley is connected to a stepper motor for driving the driving pulley to rotate.

6. The PU wheel assembly production line according to any one of claims 2 to 5, characterized in that, The bottom cover transfer module, the wheel transfer module, and the top cover transfer module also include a conveyor belt. The conveyor belt is fixed on the machine base. One end of the conveyor belt is close to the feeding mechanism, and the other end is close to the annular track. When the first pneumatic gripper is in the second position, the first pneumatic gripper is located above the conveyor belt.

7. The PU wheel assembly production line according to claim 1, characterized in that, The screw chassis loading module includes: An inclined track is provided on the outside of the circular track. The inclined track slopes downward from the end away from the circular track toward the end closer to the circular track. A horizontally positioned positioning groove is provided at the bottom of the inclined track. The second gripper is used to grip the screw base embedded in the positioning groove. The second gripper can move laterally on the machine platform to move the screw base from the positioning groove to the tray.

8. The PU wheel assembly production line according to claim 1, characterized in that, The pressing module includes: There are two positioning blocks, which are symmetrically arranged on both sides of the annular track and correspond to the tray. The opposite side of the positioning block is provided with a locking groove. A telescopic cylinder is fixedly connected to the positioning block. The telescopic cylinder is used to drive the positioning block to move so that the two positioning blocks move away from each other or move closer to each other. The clamping cylinder has a clearance hole in the middle, into which the screw base plate extends, and the clamping cylinder is located above the pressing station; A lifting cylinder is fixedly connected to the top end of the pressing cylinder, and the lifting cylinder is used to drive the pressing cylinder to move up and down.

9. The PU wheel assembly production line according to claim 1, characterized in that, The top cover feeding module includes: The first spiral vibratory feeder is used to convey the top cover; The first conveying track is connected at one end to the discharge end of the first spiral vibrating plate, and a limiting groove is provided at the other end. The limiting groove is used to constrain the position of the top cover. The third gripper is used to grip the top cover on the first conveying track. The third gripper can move laterally on the machine platform to move the top cover located in the limiting groove onto the tray.

10. A PU wheel assembly method for controlling the PU wheel assembly production line according to any one of claims 1 to 9, comprising the following steps: Step 1: The pallet is moved to the screw base loading station, and the screw base loading module places the screw base onto the pallet; Step 2: The pallet is moved to the bottom cover transfer station, and the bottom cover is placed onto the screw base by the bottom cover transfer module; Step 3: The pallet is moved to the wheel transfer station, and the wheel transfer module places the wheels on the bottom cover; Step 4: The pallet is moved to the cover transfer station, and the cover transfer module places the cover onto the wheels; Step 5: The pallet is moved to the pressing station, and the pressing module presses the screw base, bottom cover, wheels and top cover on the pallet together; Step 6: The pallet is moved to the top cover loading station, and the top cover loading module places the top cover onto the workpiece from the pallet of the pressing module; Step 7: The pallet moves to the nut locking station, and the nut locking module puts the nut onto the end of the screw base and tightens it; Step 8: The pallet is moved to the unloading station, and the unloading module pushes the finished products out of the pallet for collection; Step 9: Repeat steps 1 through 8.

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