PU wheel assembling production line and PU wheel assembling method

Abstract

The invention discloses a PU wheel assembling production line and a PU wheel assembling method for the PU wheel assembling production line. The PU wheel assembling production line comprises a machine table, a screw chassis feeding module, a bottom cover transferring module, a wheel transferring module, a surface cover transferring module, a pressing module, a nut locking module and a material returning module. A single tray circulates on the annular track once, full-automatic feeding, assembling and discharging of the PU wheels on the tray can be achieved, and efficiency is effectively improved. The clamping blocks on the machine table are matched with the clamping grooves of the tray, the tray can be stably fixed to the machining position, and the assembling accuracy is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of pulley assembly, in particular to a PU wheel assembly production line and a PU wheel assembly method. BACKGROUND

[0002] Traditional PU pulley assembly production mainly relies on manual operation, which has problems of low production efficiency, unstable product quality, high labor intensity and high production cost. With the increasing demand for PU wheel products and the increasing quality requirements, the traditional production method has been difficult to meet the needs of modern large-scale production. SUMMARY

[0003] The present application aims to at least solve one of the technical problems existing in the prior art. To this end, the present application proposes a PU wheel assembly production line, which can automatically assemble PU wheels and improve efficiency.

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

[0005] The PU wheel assembly production line according to the first aspect of the present application comprises a machine table, a screw base loading 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. The machine table is provided with a ring track, and a plurality of trays are slidably connected to the ring track. The trays are used to hold workpieces. Along the moving path of the trays, the machine table is sequentially provided with a screw base loading station, a bottom cover transfer station, a wheel transfer station, a surface cover transfer station, a pressing station, a top cover loading station, a nut locking station and a material returning station. The screw base loading module is arranged outside the ring track and located at the screw base loading station. The screw base loading module is used to place the screw base on the tray. The bottom cover transfer module is arranged outside the ring track and located at the bottom cover transfer station. The bottom cover transfer module is used to assemble the bottom cover on the tray from the screw base loading module. The wheel transfer module is arranged outside the ring track and located at the wheel transfer station. The wheel transfer module is used to assemble the wheel on the tray from the bottom cover transfer module. The surface cover transfer module is arranged outside the ring track and located at the surface cover transfer station. The surface cover transfer module is used to assemble the surface cover on the tray from the wheel transfer module. The pressing module is arranged outside the ring track and located at the pressing station. The pressing module is used to press the workpiece on the tray from the surface cover transfer module. The nut locking module is arranged outside the ring track and located at the nut locking station. The nut locking module is used to fit the nut on the workpiece on the tray from the pressing module and tighten it. The material returning module is arranged outside the ring track and located at the material returning station. The material returning module is used to push the finished product from the nut locking module out of the machine table. The machine table is provided with a plurality of liftable clamping blocks, and the outer side of the tray is provided with clamping holes. The clamping blocks can be lifted and clamped into the clamping holes to fix the tray at the screw base loading station, the bottom cover transfer station, the wheel transfer station, the surface cover transfer station, the pressing station, the top cover loading station, the nut locking station or the material returning station.

[0006] The PU wheel assembly production line according to the present application has at least the following beneficial effects: 1. A single tray can realize full-automatic loading, assembly and unloading of the PU wheel on the tray once circulating on the ring track, effectively improving the efficiency.

[0007] 2. The clamping blocks on the machine table cooperate with the clamping holes of the tray to stably fix the tray at the processing position, improving the assembly accuracy.

[0008] According to some embodiments of the present application, the bottom cover transfer module, the wheel transfer module and the face cover transfer module each comprise a feeding mechanism, the feeding mechanism comprising a base, a turntable, a first guide rod, a lifting mechanism, a horizontal guide rail and a first pneumatic clamp jaw, the base being fixed to the ground; the turntable is pivotally installed on the surface of the base, the outer side of the turntable is equidistantly spaced to surround a plurality of material loading platforms; the first guide rod is fixed on the turntable, the first guide rod is arranged in the vertical direction, the first guide rod is used to sleeve the bottom cover, the wheel or the face cover, and at least one first guide rod is arranged in a single material loading platform; the lifting mechanism is installed on the base in a lifting manner, the lifting mechanism is arranged on one side of the turntable, the lifting mechanism is provided with a clamping groove, wherein the turntable can rotate to make one of the material loading platforms and the lifting mechanism position corresponding, and the corresponding material loading platform can be embedded in the clamping groove, the lifting mechanism is used to lift the bottom cover, the wheel or the face cover sleeved on the first guide rod; the horizontal guide rail is fixed above the base and above the first guide rod, the horizontal guide rail is slidingly connected with a horizontal sliding block, the horizontal sliding block is configured to move between a first position and a second position along the horizontal guide rail; the first pneumatic clamp jaw is fixedly connected with the horizontal sliding block, when the first pneumatic clamp jaw is located at the first position, the first pneumatic clamp jaw is located above the lifting mechanism and is used to clamp the bottom cover, the wheel or the face cover sleeved on the first guide rod; when the first pneumatic clamp jaw moves from the first position to the second position, the first pneumatic clamp jaw moves towards the bottom cover transfer station, the wheel transfer station or the face cover transfer station.

[0009] According to some embodiments of the present application, two material loading platforms are taken as a group, the turntable can rotate to make one group of material loading platforms and the lifting mechanism correspondingly arranged, the lifting mechanism is provided with two clamping grooves, the clamping grooves and the material loading platforms one-to-one correspond, the first pneumatic clamp jaw is provided with two, two first pneumatic clamp jaws and two clamping grooves one-to-one correspond; wherein the horizontal sliding block is fixedly connected with a first connecting plate, the first connecting plate is perpendicular to the moving direction of the horizontal sliding block, one end of the first connecting plate away from the horizontal sliding block is fixedly connected with a driving cylinder, the driving end of the driving cylinder is fixedly connected with a second connecting plate, both ends of the second connecting plate are respectively fixedly connected with the first pneumatic clamp jaw.

[0010] According to some embodiments of the present application, 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, the lifting mechanism 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 rack, a first proximity sensor is arranged above the rack, the first proximity sensor is electrically connected with the driving mechanism, wherein, when the lifting mechanism moves to the reset position, the lifting mechanism can trigger the first proximity sensor to cooperate, and the driving mechanism is controlled through the first proximity sensor, so that the lifting mechanism falls from the reset position to the loading position; a second proximity sensor is arranged below the rack, the second proximity sensor is electrically connected with a servo motor for controlling the rotation of the turntable, wherein, when the lifting mechanism moves from the reset position to the loading position, the lifting mechanism can trigger the second proximity sensor, and the servo motor is controlled through the second proximity sensor, so that the tray rotates.

[0011] According to some embodiments of the present application, the lifting mechanism comprises 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 in sliding connection with the second guide rod, the lifting block can slide along the length direction of the second guide rod, one side of the lifting block towards the turntable is provided with the clamping groove, the lifting block and the loading platform are correspondingly arranged; the linkage plate is fixedly connected with the lifting block, one end of the linkage plate is fixedly connected with the driving mechanism; the driving mechanism comprises a driving pulley, a driven pulley and a transmission belt, the transmission belt is fixedly connected with a moving block, one end of the linkage plate is fixedly connected with the moving block, the transmission belt is arranged between the driving pulley and the driven pulley, the transmission belt is arranged in the vertical direction, the driving pulley and the driven pulley are pivotally installed on the base, and the driving pulley is connected with a stepping motor for driving the driving pulley to rotate.

[0012] According to some embodiments of the present application, the base cover transfer module, the wheel transfer module and the face cover transfer module further comprise a conveying belt, the conveying belt is fixed on the machine table, one end of the conveying belt is close to the loading mechanism, and the other end of the conveying belt is close to the annular track, wherein, when the first pneumatic clamp jaw is located at the second position, the first pneumatic clamp jaw is located above the conveying belt.

[0013] According to some embodiments of the present application, the screw chassis feeding module comprises an inclined track and a second gripper. The inclined track is arranged outside the annular track. The inclined track is inclined downward from the end far away from the annular track to the end close to the annular track. The lowermost end of the inclined track is provided with a horizontally arranged positioning groove. The second gripper is used to clamp the screw chassis embedded in the positioning groove. The second gripper can move horizontally on the machine table to move the screw chassis from the positioning groove to the tray.

[0014] According to some embodiments of the present application, the pressing module comprises positioning blocks, telescopic cylinders, a pressing cylinder and a lifting cylinder. The two positioning blocks are symmetrically arranged on both sides of the annular track and correspondingly arranged with the tray. The opposite side of the positioning block is provided with a clamping groove. The telescopic cylinder is fixedly connected with 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 close to each other. The pressing cylinder is provided with a avoiding hole in the middle. The avoiding hole is used for the screw chassis to extend into. The pressing cylinder is located above the pressing station. The lifting cylinder is fixedly connected with the top end of the pressing cylinder. The lifting cylinder is used to drive the pressing cylinder to move up and down.

[0015] According to some embodiments of the present application, the top cover feeding module comprises a first spiral vibration disc, a first conveying track and a third gripper. The first spiral vibration disc is used to convey the top cover. One end of the first conveying track is connected to the discharge end of the first spiral vibration disc. The other end is provided with a limiting groove. The limiting groove is used to constrain the position of the top cover. The third gripper is used to clamp the top cover on the first conveying track. The third gripper can move horizontally on the machine table to move the top cover located in the limiting groove to the tray.

[0016] The PU wheel assembly method according to the second aspect of the present application is used to control the PU wheel assembly production line according to the first aspect of the present application. The method comprises the following steps: Step 1: The tray is moved to the screw chassis feeding station, and the screw chassis is placed on the tray by the screw chassis feeding module. Step 2: The tray is moved to the bottom cover transfer station, and the bottom cover is placed on the screw chassis by the bottom cover transfer module. Step 3: The tray is moved to the wheel transfer station, and the wheel is placed on the bottom cover by the wheel transfer module. Step 4: The tray is moved to the face cover transfer station, and the face cover is placed on the wheel by the face cover transfer module. Step 5: The tray is moved to the pressing station, and the screw chassis, the bottom cover, the wheel and the face cover on the tray are pressed by the pressing module. Step 6: The tray is moved to the top cover feeding station, and the face cover is placed on the tray by the top cover feeding module. Step 7: The tray is moved to the nut locking station, and the nut is sleeved on the end of the screw base by the nut locking module, and is tightened; Step 8: The tray is moved to the material returning station, and the finished product tray is pushed out of the tray by the material returning module for collection; Step 9: Repeat steps 1 to 8.

[0017] According to the PU wheel assembly method of the embodiment of the present application, at least the following beneficial effects are achieved: 1. The single tray circulates on the annular track once, and the PU wheel on the tray can be automatically fed, assembled and discharged, thereby effectively improving the efficiency.

[0018] 2. The clamping block on the machine table cooperates with the clamping hole of the tray to stably fix the tray on the machining position, thereby improving the assembly accuracy.

[0019] Additional aspects and advantages of the present application will be in part apparent and in part pointed out hereinafter. BRIEF DESCRIPTION OF DRAWINGS

[0020] The present application will be further described below in conjunction with the drawings and examples, wherein: Figure 1 It is a schematic diagram of the PU wheel assembly production line of the embodiment of the present application; Figure 2 It is a schematic diagram of the feeding mechanism of the embodiment of the present application; Figure 3 It is a schematic diagram of one direction of the feeding mechanism (without first guide rod and conveying belt) of the embodiment of the present application; Figure 4 It is a schematic diagram of another direction of the feeding mechanism (without first guide rod and conveying belt) of the embodiment of the present application; Figure 5 It is a schematic diagram of the screw base feeding module of the embodiment of the present application; Figure 6 It is a schematic diagram of the pressing module of the embodiment of the present application; Figure 7 It is a schematic diagram of the top cover feeding module of the embodiment of the present application; Figure 8 It is a schematic diagram of the nut locking module of the embodiment of the present application; Figure 9 It is a schematic diagram of the material returning module of the embodiment of the present application; Figure 10 It is a schematic diagram of the tray of the embodiment of the present application.

[0021] 100, machine table; 110, annular track; 120, tray; 121, magnet; 122, containing groove; 130, clamping block; 131, clamping hole; 101, screw chassis loading station; 102, bottom cover transfer station; 103, wheel transfer station; 104, face cover transfer station; 105, pressing station; 106, top cover loading station; 107, nut locking station; 108, material returning station; 200, screw chassis loading module; 210, inclined rail; 211, positioning groove; 220, second clamping jaw; 300, bottom cover transfer module; 400, wheel transfer module; 500, face cover transfer module; 600, pressing module; 610, positioning block; 611, clamping groove; 620, telescopic air cylinder; 630, pressing cylinder; 631, avoiding hole; 640, lifting air cylinder; 700, top cover loading module; 710, first spiral vibration disc; 720, first conveying rail; 721, limiting groove; 730, third clamping jaw; 800, nut locking module; 810, second spiral vibration disc; 820, second conveying rail; 830, material pushing block; 831, groove; 840, pneumatic screwdriver; 900, material returning module; 910, material returning block; 911, material returning air cylinder; 920, conveying track; 1000, loading mechanism; 1010, base; 1020, turntable; 1021, material loading platform; 1030, first guide rod; 1040, lifting mechanism; 1041, second guide rod; 1042, lifting block; 10421, clamping groove; 1043, linkage plate; 1044, driving mechanism; 10441, driving pulley; 10442, driven pulley; 10443, transmission belt; 10444, moving block; 1050, horizontal guide rail; 1051, horizontal sliding block; 1052, first connecting plate; 1053, driving air cylinder; 1060, first pneumatic clamping jaw; 1070, rack; 1071, first proximity sensor; 1072, second proximity sensor; 1080, conveying belt. DETAILED DESCRIPTION

[0022] Embodiments of the present application are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are only used to explain the present application, and cannot be understood as a limitation of the present application.

[0023] In the description of the present application, it should be understood that the orientation description, such as the orientation or position relationship indicated by the upper, lower, front, rear, left, right and the like, is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0024] In the description of the present application, several meanings are one or more, and the meaning of multiple is more than two, greater than, less than, more than, etc. are understood as not including the number, and above, below, within, etc. are understood as including the number. If the first, second is described, it is only for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features or the order of the indicated technical features.

[0025] In the description of the present application, unless otherwise explicitly limited, the words such as setting, installing, connecting and the like should be broadly understood, and the person skilled in the art can reasonably determine the specific meaning of the above words in the present application in combination with the specific content of the technical scheme.

[0026] Reference Figures 1 to 10The PU wheel assembly production line of the first aspect embodiment of the present application comprises a machine table 100, a screw base loading module 200, a bottom cover transfer module 300, a wheel transfer module 400, a surface cover transfer module 500, a pressing module 600, a nut locking module 800 and a material returning module 900. The machine table 100 is provided with a ring track 110, and a plurality of trays 120 are slidably connected to the ring track 110. The trays 120 are used to hold workpieces. Along the moving path of the trays 120, the machine table 100 is sequentially provided with a screw base loading station 101, a bottom cover transfer station 102, a wheel transfer station 103, a surface cover transfer station 104, a pressing station 105, a top cover loading station 106, a nut locking station 107 and a material returning station 108. The screw base loading module 200 is arranged outside the ring track 110 and located at the screw base loading station 101. The screw base loading module 200 is used to place a screw base on the tray 120. The bottom cover transfer module 300 is arranged outside the ring track 110 and located at the bottom cover transfer station 102. The bottom cover transfer module 300 is used to assemble a bottom cover on the tray 120 from the screw base loading module 200. The wheel transfer module 400 is arranged outside the ring track 110 and located at the wheel transfer station 103. The wheel transfer module 400 is used to assemble a wheel on the tray 120 from the bottom cover transfer module. The surface cover transfer module 500 is arranged outside the ring track 110 and located at the surface cover transfer station 104. The surface cover transfer module 500 is used to assemble a surface cover on the tray 120 from the wheel transfer module 400. The pressing module 600 is arranged outside the ring track 110 and located at the pressing station 105. The pressing module 600 is used to press the workpiece on the tray 120 from the surface cover transfer module 500. The nut locking module 800 is arranged outside the ring track 110 and located at the nut locking station 107. The nut locking module 800 is used to fit a nut on the workpiece on the tray 120 from the pressing module 600 and tighten it. The material returning module 900 is arranged outside the ring track 110 and located at the material returning station 108. The material returning module 900 is used to push the finished product from the nut locking module 800 out of the machine table 100. The machine table 100 is provided with a plurality of liftable clamping blocks 130, and the outer side of the tray 120 is provided with clamping holes 131. The clamping blocks 130 can be lifted and clamped into the clamping holes 131 to fix the tray 120 at the screw base loading station 101, the bottom cover transfer station 102, the wheel transfer station 103, the surface cover transfer station 104, the pressing station 105, the top cover loading station 106, the nut locking station 107 or the material returning station 108.

[0027] The plurality of trays 120 move on the annular track 110, and each tray 120 passes each processing station in turn; when the tray 120 reaches the processing station, the clamping block 130 on the machine table 100 automatically rises and clamps into the clamping hole 131 of the tray 120; after the tray 120 is accurately positioned, the processing module of the corresponding processing station starts to perform the corresponding assembly operation; after the operation is completed, the clamping block 130 is lowered, and the tray 120 continues to move to the next processing station; specifically, there are a plurality of trays 120 on the annular track 110, and the whole process can be realized in a continuous pipeline operation, and a plurality of trays 120 are processed at different processing stations at the same time.

[0028] In the embodiment of the present application, the PU wheel assembly production line has the following PU wheel assembly method, comprising the following steps: Step 1: The tray 120 moves to the screw base feeding station 101, and the screw base feeding module 200 places the screw base on the tray 120; Step 2: The tray 120 moves to the bottom cover transfer station 102, and the bottom cover transfer module 300 places the bottom cover on the screw base; Step 3: The tray 120 moves to the wheel transfer station 103, and the wheel transfer module 400 places the wheel on the bottom cover; Step 4: The tray 120 moves to the cover transfer station 104, and the cover transfer module 500 places the cover on the wheel; Step 5: The tray 120 moves to the pressing station 105, and the pressing module 600 presses the screw base, the bottom cover, the wheel and the cover on the tray 120; Step 6: The tray 120 moves to the top cover feeding station 106, and the top cover feeding module 700 places the tray 120 on the cover; Step 7: The tray 120 moves to the nut locking station 107, and the nut locking module 800 threads the nut to the end of the screw base and tightens; Step 8: The tray 120 moves to the material returning station 108, and the material returning module 900 pushes the finished product disc out of the tray 120 for collection; Step 9: Repeat steps 1 to 8.

[0029] In summary, in the embodiment of the present application, a single tray 120 circulates on the annular track 110 once, that is, the PU wheel on the tray 120 can be fully automatically fed, assembled and discharged, which effectively improves the efficiency; by using the clamping block 130 on the machine table 100 cooperating with the clamping groove 10421 of the tray 120, the tray 120 can be stably fixed on the processing position, improving the assembly accuracy.

[0030] In some embodiments, reference is made to Figure 10, the tray 120 is provided with a containing groove 122 which is just embedded into the screw chassis, and a magnet 121 is fixed in the middle of the containing groove 122. The screw chassis is placed into the containing groove 122 of the tray 120, the shape of the containing groove 122 is accurately matched with the chassis; the magnet 121 firmly adsorbs the iron screw chassis at the bottom of the containing groove 122; during the assembly process, the magnet 121 ensures that the chassis cannot move or tilt, thereby improving the stability of the screw chassis during the assembly process and preventing the position deviation of the screw chassis during the moving or assembling process.

[0031] In some embodiments, with reference to Figure 1 and Figure 2 , the bottom cover transfer module 300, the wheel transfer module 400 and the face cover transfer module 500 each include a feeding mechanism 1000, the feeding mechanism 1000 includes a base 1010, a rotating disc 1020, a first guide rod 1030, a lifting mechanism 1040, a horizontal guide rail 1050 and a first pneumatic clamp jaw 1060, the base 1010 is fixed on the ground; the rotating disc 1020 is pivotally installed on the surface of the base 1010, and a plurality of loading platforms 1021 are equidistantly and circumferentially arranged on the outer side of the rotating disc 1020; the first guide rod 1030 is fixed on the rotating disc 1020 and is arranged in the vertical direction, and the first guide rod 1030 is used for sleeving the bottom cover, the wheel or the face cover, and at least one first guide rod 1030 is arranged in a single loading platform 1021; the lifting mechanism 1040 is liftably installed on the base 1010 and is arranged on one side of the rotating disc 1020, and the lifting mechanism 1040 is provided with a clamping groove 10421, wherein the rotating disc 1020 can rotate to make one of the loading platforms 1021 and the lifting mechanism 1040 in position correspondence, and the corresponding loading platform 1021 can be embedded into the clamping groove 10421, and the lifting mechanism 1040 is used for lifting the bottom cover, the wheel or the face cover sleeved on the first guide rod 1030; the horizontal guide rail 1050 is fixed above the base 1010 and above the first guide rod 1030, and the horizontal guide rail 1050 is slidingly connected with a horizontal sliding block 1051, which is configured to move between a first position and a second position along the horizontal guide rail 1050; the first pneumatic clamp jaw 1060 is fixedly connected with the horizontal sliding block 1051, and when the first pneumatic clamp jaw 1060 is located at the first position, the first pneumatic clamp jaw 1060 is located above the lifting mechanism 1040 and is used for clamping the bottom cover, the wheel or the face cover sleeved on the first guide rod 1030; when the first pneumatic clamp jaw 1060 moves from the first position to the second position, the first pneumatic clamp jaw 1060 moves towards the bottom cover transfer station 102, the wheel transfer station 103 or the face cover transfer station 104.

[0032] Step 1: The bottom cover, the wheel or the face cover is sleeved on the first guide rod 1030, and a plurality of loading platforms 1021 are distributed around the rotating disc 1020; Step 2: the rotating disc 1020 rotates, and the carrier platform 1021 loaded with the workpiece (bottom cover, wheel or face cover) is rotated to the position of the lifting mechanism 1040; Step 3: the lifting mechanism 1040 rises, and the workpiece at the bottom layer is lifted from the guide rod; Step 4: the first pneumatic clamping jaw 1060 moves to the first position along the horizontal guide rail 1050 and is located above the lifting mechanism 1040, and clamps the lifted workpiece at the top end; In the above working process, automatic feeding and accurate transfer of the workpiece are realized, and the clamping groove 10421 can avoid the carrier platform 1021 and lift the workpiece sleeved on the first guide rod 1030.

[0033] Further, referring to Figure 3 and Figure 4 , along the length direction of the first guide rod 1030, the lifting mechanism 1040 is configured to move between the feeding position and the reset position. When the lifting mechanism 1040 is located at the feeding position, the lifting mechanism 1040 is located below the rotating disc 1020. The lifting mechanism 1040 is provided with a driving mechanism 1044 for driving the lifting mechanism 1040 to rise and fall. The base 1010 is fixed with a rack 1070, and the upper portion of the rack 1070 is provided with a first proximity sensor 1071. The first proximity sensor 1071 is electrically connected with the driving 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 the driving mechanism 1044 is controlled through the first proximity sensor 1071, so that the lifting mechanism 1040 falls from the reset position to the feeding position. The lower portion of the rack 1070 is provided with a second proximity sensor 1072, and the second proximity sensor 1072 is electrically connected with a servo motor for controlling the rotation of the rotating disc 1020. When the lifting mechanism 1040 moves from the reset position to the feeding position, the lifting mechanism 1040 can trigger the second proximity sensor 1072, and the servo motor is controlled through the second proximity sensor 1072, so that the rotating disc 1020 rotates.

[0034] The lifting mechanism 1040 is used to reset the lifting mechanism 1040 and control the rotating disc 1020 during the reciprocating movement between the "reset position - loading position". When the lifting mechanism 1040 rises to the reset position, the first proximity sensor 1071 is triggered, and the driving mechanism 1044 is controlled to make the lifting mechanism 1040 descend to the loading position. At this time, only one set of workpieces lifted by the lifting mechanism 1040 is left, which is clamped by the first pneumatic clamp 1060. Then, the lifting mechanism 1040 needs to descend to the loading position to wait for the next set of workpieces on the loading platform 1021 to move above the lifting mechanism 1040. During the descending process of the lifting mechanism 1040, the second proximity sensor 1072 is triggered, and the servo motor is controlled to rotate the rotating disc 1020, so that the next set of loading platforms 1021 is rotated to the position corresponding to the position of the lifting mechanism 1040. Specifically, the servo motor can realize accurate control of the rotation angle, thereby improving the accuracy of the work position switching.

[0035] In some embodiments, referring to Figure 3 and Figure 4 The rotating disc 1020 can rotate to make one set of loading platforms 1021 correspond to the lifting mechanism 1040. The lifting mechanism 1040 is provided with two clamping grooves 10421, and the clamping grooves 10421 correspond to the loading platforms 1021 one by one. The first pneumatic clamp 1060 is provided with two, and the two first pneumatic clamps 1060 correspond to the two clamping grooves 10421 one by one. The horizontal sliding block 1051 is fixedly connected with the first connecting plate 1052, the first connecting plate 1052 is perpendicular to the moving direction of the horizontal sliding block 1051, and the end of the first connecting plate 1052 away from the horizontal sliding block 1051 is fixedly connected with the driving cylinder 1053. The driving end of the driving cylinder 1053 is fixedly connected with the second connecting plate, and the two ends of the second connecting plate are respectively fixedly connected with the first pneumatic clamp 1060.

[0036] The rotating disc 1020 rotates to make one set of two loading platforms 1021 correspond to the position of the lifting mechanism 1040. The two clamping grooves 10421 of the lifting mechanism 1040 are simultaneously embedded in the two loading platforms 1021, and the two workpieces are simultaneously lifted. The two first pneumatic clamps 1060 are simultaneously lowered to clamp the two lifted workpieces, thereby improving the overall utilization rate of the equipment.

[0037] In some embodiments, referring to Figure 3 and Figure 4The lifting mechanism 1040 comprises 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 at one side of the rotary disc 1020. The lifting block 1042 is in sliding connection with the second guide rod 1041 and can slide along the length direction of the second guide rod 1041. The lifting block 1042 is provided with a clamping groove 10421 on the side facing the rotary disc 1020, and the lifting block 1042 and the material loading platform 1021 are correspondingly arranged. The linkage plate 1043 is fixedly connected with the lifting block 1042, and one end of the linkage plate 1043 is fixedly connected with a driving mechanism 1044. The driving mechanism 1044 comprises a driving pulley 10441, a driven pulley 10442 and a transmission belt 10443. The transmission belt 10443 is fixedly connected with a moving block 10444, one end of the linkage plate 1043 is fixedly connected with the moving block 10444, the transmission belt 10443 is arranged between the driving pulley 10441 and the driven pulley 10442, the transmission belt 10443 is arranged in the vertical direction, and the driving pulley 10441 and the driven pulley 10442 are pivotally mounted on the base 1010. The driving pulley 10441 is connected with a stepping motor for driving the driving pulley 10441 to rotate.

[0038] The stepping motor drives the driving pulley 10441 to rotate, drives the driven pulley 10442 through the transmission belt 10443, drives the moving block 10444 to move up and down through the rotation of the transmission belt 10443, converts the rotary motion into linear motion, and transmits the motion of the moving block 10444 to the lifting block 1042 through the linkage plate 1043, so that the lifting block 1042 slides up and down along the second guide rod 1041. In the above working process, the clamping groove 10421 on the lifting block 1042 is accurately matched with the material loading platform 1021, the stable lifting of the workpiece is realized, and the motion interference is avoided. The accurate control of the stepping motor can ensure the accurate positioning of the lifting block 1042.

[0039] As a further optimization of the above embodiment, with reference to Figure 2The bottom cover transfer module 300, the wheel transfer module 400 and the face cover transfer module 500 further comprise a conveying belt 1080 fixed on the machine table 100, one end of the conveying belt 1080 being close to the feeding mechanism 1000 and the other end being close to the annular track 110. When the first pneumatic gripper 1060 is in the second position, the first pneumatic gripper 1060 is above the conveying belt 1080. After the workpiece is clamped by the first pneumatic gripper 1060 from the lifting mechanism 1040, the workpiece is moved to above the conveying belt 1080 and placed on the conveying belt 1080 for conveying. Specifically, a fourth pneumatic gripper for moving the workpiece at the end of the conveying belt 1080 to the tray 120 and assembling the workpiece with the original workpiece on the tray 120 is arranged at the end of the conveying belt 1080 and the tray 120.

[0040] In some embodiments, with reference to Figure 5 The screw bottom disc feeding module 200 comprises an inclined track 210 and a second gripper 220. The inclined track 210 is arranged outside the annular track 110 and is inclined downward from the end far away from the annular track 110 to the end close to the annular track 110. The lowermost end of the inclined track 210 is provided with a horizontally arranged positioning groove 211. The second gripper 220 is used to clamp the screw bottom disc embedded in the positioning groove 211. The second gripper 220 can move horizontally on the machine table 100 to move the screw bottom disc from the positioning groove 211 to the tray 120. The screw bottom disc automatically slides down along the inclined track 210 under the action of gravity, slides into the horizontally arranged positioning groove 211 and is accurately positioned. The second gripper 220 moves above the positioning groove 211, clamps the screw bottom disc and moves horizontally to above the tray 120, accurately places the screw bottom disc on the tray 120, makes the screw bottom disc and the magnet 121 on the tray 120 be attracted and connected, and realizes automatic feeding and positioning of the screw bottom disc.

[0041] In some embodiments, with reference to Figure 6The compression module 600 includes positioning blocks 610, telescopic cylinders 620, compression cylinders 630, and lifting cylinders 640. The positioning blocks 610 are provided in two, symmetrically arranged on both sides of the annular track 110, and correspondingly arranged with the tray 120. The opposite side of the positioning block 610 is provided with a clamping groove 611. The telescopic cylinder 620 is fixedly connected with the positioning block 610, and is used to drive the positioning block 610 to move, so that the two positioning blocks 610 move away from or close to each other. The compression cylinder 630 is provided with a relief hole 631 in the middle, the relief hole 631 is used for the screw chassis to extend into, and the compression cylinder 630 is located above the compression station 105. The lifting cylinder 640 is fixedly connected with the top end of the compression cylinder 630, and is used to drive the compression cylinder 630 to move up and down. After the tray 120 reaches the compression station 105, the two positioning blocks 610 move to the middle under the drive of the telescopic cylinder 620, the clamping groove 611 of the positioning block 610 cooperates with the tray 120 or the side surface of the workpiece, accurate lateral positioning is realized, the lifting cylinder 640 drives the compression cylinder 630 to descend, and the compression cylinder 630 is aligned with the workpiece. The workpiece is compressed by the compression cylinder 630, the tight combination is ensured, after the compression is completed, the compression cylinder 630 rises, the positioning block 610 retreats, and the tray 120 continues to move. Through lateral positioning and axial compression, three-dimensional positioning is realized, the tight combination between the components is ensured, and the structural strength and stability of the product are improved.

[0042] In some embodiments, with reference to Figure 7 The top cover feeding module 700 includes a first spiral vibration disc 710, a first conveying track 720, and a third clamping jaw 730. The first spiral vibration disc 710 is used for conveying the top cover. One end of the first conveying track 720 is connected to the discharge end of the first spiral vibration disc 710, and the other end is provided with a limiting groove 721 for restricting the position of the top cover. The third clamping jaw 730 is used for clamping the top cover on the first conveying track 720, and can move horizontally on the machine table 100 to move the top cover located in the limiting groove 721 to the tray 120. The first spiral vibration disc 710 sorts the top cover in a certain direction through vibration, and the sorted top cover rises along the spiral track and enters the first conveying track 720. The top cover is conveyed into the limiting groove 721 to realize accurate position positioning. The third clamping jaw 730 clamps the top cover in the limiting groove 721 and moves horizontally above the tray 120 to accurately place the top cover to the specified position of the workpiece.

[0043] In some embodiments, with reference to Figure 8The nut locking module 800 comprises a second spiral vibration disc 810, a second conveying track 820, a pushing block 830 and a pneumatic screwdriver 840, the second spiral vibration disc 810 is used for conveying nuts; one end of the second conveying track 820 is connected to the discharging end of the second spiral vibration disc 810, and the other end is arranged on one side of the tray 120; one end of the pushing block 830 is connected with a pushing cylinder, and the other end is provided with a groove 831 for embedding nuts; the pneumatic screwdriver 840 is installed on the machine table 100 in a lifting manner, and the pneumatic screwdriver 840 is located above the nut locking station 107; wherein the pushing cylinder can drive the pushing block 830 to push the nuts between the pneumatic screwdriver 840 and the workpiece. The second spiral vibration disc 810 sorts and conveys the nuts to the second conveying track 820, the nuts are conveyed along the second conveying track 820 to the position of the pushing block 830, the groove 831 of the pushing block 830 accurately positions the nuts, the pushing cylinder drives the pushing block 830 to push the nuts to the end of the screw base 1010, and the pneumatic screwdriver 840 is lowered to tighten the nuts on the screw base 1010.

[0044] In some embodiments, with reference to Figure 9 The material returning module 900 comprises a material returning block 910 and a conveying track 920, the material returning block 910 is located inside the annular track 110, the material returning block 910 and the conveying track 920 are located on both sides of the annular track 110 and are oppositely arranged, the material returning block 910 is fixedly connected with a material returning cylinder 911, and the material returning cylinder 911 pushes the finished product to the conveying track 920. The finished product assembled is brought to the material returning station 108 with the tray 120, the clamping block 130 is raised to fix the position of the tray 120, the material returning cylinder 911 drives the material returning block 910 to push the finished product out of the tray 120, the finished product is pushed onto the conveying track 920 and is carried away by the conveying track 920 for collection, and the empty tray 120 continues to circulate on the annular track 110, ready for the next assembly, realizing automatic unloading and collection of the finished product, ensuring reliable separation of the finished product from the tray 120, and realizing recycling of the tray 120.

[0045] In summary, the PU wheel assembly production line realizes full-automatic production of PU wheel assembly through the annular track 110 conveying system and multi-station parallel operation. The modules work cooperatively from screw base feeding, bottom cover assembly, wheel installation, face cover assembly, pressing treatment, top cover installation to nut locking and finished product material returning, forming a complete automatic production process.

[0046] The embodiments of the application are described in detail above with reference to the drawings, but the application is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the purpose of the application.

Claims

1. A PU wheel assembly production line characterized by, The utility model relates to a kind of machine table, be provided with annular track, the annular track is slidably connected with multiple trays, the tray is used to hold workpiece, along the moving path of the tray, the machine table is sequentially provided with screw chassis feeding station, bottom cover transfer station, wheel transfer station, face cover transfer station, compression station, top cover feeding station, nut locking station and material withdrawal station; Screw chassis feeding module is arranged outside the annular track and located at the screw chassis feeding station, and the screw chassis feeding module is used to place the screw chassis on the tray; Bottom cover transfer module is arranged outside the annular track and located at the bottom cover transfer station, and the bottom cover transfer module is used to assemble the bottom cover on the tray from the screw chassis feeding module; Wheel transfer module is arranged outside the annular track and located at the wheel transfer station, and the wheel transfer module is used to assemble the wheel on the tray from the bottom cover transfer module; Face cover transfer module is arranged outside the annular track and located at the face cover transfer station, and the face cover transfer module is used to assemble the face cover on the tray from the wheel transfer module; Compression module is arranged outside the annular track and located at the compression station, and the compression module is used to compress the workpiece on the tray from the face cover transfer module; Top cover feeding module is arranged outside the annular track and located at the top cover feeding station, and the top cover feeding module is used to set the top cover on the workpiece on the tray from the compression module; Nut locking module is arranged outside the annular track and located at the nut locking station, and the nut locking module is used to set the nut on the workpiece from the top cover feeding module and tighten it; Material withdrawal module is arranged outside the annular track and located at the material withdrawal station, and is used to push the finished product from the nut locking module out of the machine table; Wherein, the machine table is provided with a plurality of liftable clamping blocks, the outer side of the tray is provided with a clamping hole, the clamping block can be lifted and clamped into the clamping hole, so that the tray is fixed at the screw chassis feeding station, the bottom cover transfer station, the wheel transfer station, the face cover transfer station, the compression station, the top cover feeding station, the nut locking station or the material withdrawal station. The bottom cover transfer module, the wheel transfer module and the face cover transfer module each include a feeding mechanism, and the feeding mechanism includes:

2. The PU wheel assembly line of claim 1, wherein, A base is fixed to the ground. A turntable is pivotally mounted to the surface of the base, and a plurality of loading platforms are equidistantly spaced around the outer side of the turntable. A first guide rod is fixed to the turntable, and the first guide rod is arranged in the vertical direction, and the first guide rod is used to set the bottom cover, the wheel or the face cover, and at least one first guide rod is arranged in a single loading platform. ​ A lifting mechanism is installed on the base in a liftable manner, and is arranged on one side of the rotating disc. The lifting mechanism is provided with a clamping groove. The rotating disc is rotatable to correspond the lifting mechanism with one of the loading platforms, and the corresponding loading platform can be embedded in the clamping groove. The lifting mechanism is used to lift the bottom cover, wheel or face cover sleeved on the first guide rod; A horizontal guide rail is fixed above the base and above the first guide rod. A horizontal sliding block is slidably connected to the horizontal guide rail. The horizontal sliding block is configured to move between a first position and a second position along the horizontal guide rail; A first pneumatic clamp jaw is fixedly connected to the horizontal sliding block. When the first pneumatic clamp jaw is located at the first position, the first pneumatic clamp jaw is located above the lifting mechanism and is used to clamp the bottom cover, wheel or face cover sleeved on the first guide rod. When the first pneumatic clamp jaw moves from the first position to the second position, the first pneumatic clamp jaw moves towards the bottom cover transfer station, the wheel transfer station or the face cover transfer station.

3. The PU wheel assembly line of claim 2, wherein, Two loading platforms are taken as a group. The rotating disc is rotatable to correspond the lifting mechanism with one of the loading platforms. The lifting mechanism is provided with two clamping grooves corresponding to the loading platforms. The first pneumatic clamp jaw is provided with two first pneumatic clamp jaws corresponding to the clamping grooves. The horizontal sliding block is fixedly connected with a first connecting plate perpendicular to the moving direction of the horizontal sliding block. The first connecting plate is fixedly connected with a drive cylinder at the end away from the horizontal sliding block. The drive cylinder is fixedly connected with a second connecting plate at the drive end. The second connecting plate is fixedly connected with the first pneumatic clamp jaw at both ends.

4. The PU wheel assembly line of claim 2, wherein, 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, the lifting mechanism is located below the rotating disc. The lifting mechanism is provided with a driving mechanism for driving the lifting mechanism to rise and fall. The base is fixed with a rack. A first proximity sensor is arranged above the rack. The first proximity sensor is electrically connected with the driving mechanism. When the lifting mechanism moves to the reset position, the lifting mechanism can trigger the first proximity sensor to cooperate and control the driving mechanism through the first proximity sensor, so that the lifting mechanism falls from the reset position to the loading position. A second proximity sensor is arranged below the rack. The second proximity sensor is electrically connected with a servo motor for controlling the rotation of the rotating disc. 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, so that the rotating disc rotates.

5. The PU wheel assembly line of claim 4, wherein, The lifting mechanism comprises: A second guide rod is vertically fixed to the base and located on one side of the rotating disc. A lifting block is slidably connected with the second guide rod, and the lifting block can slide along the length direction of the second guide rod. The lifting block is provided with the clamping groove on the side facing the rotary disc. The lifting block and the load platform are correspondingly arranged. A linkage plate is fixedly connected with the lifting block. One end of the linkage plate is fixedly connected with the driving mechanism. The driving mechanism comprises a driving pulley, a driven pulley and a transmission belt. The transmission belt is fixedly connected with a moving block. One end of the linkage plate is fixedly connected with the moving block. The transmission belt is arranged between the driving pulley and the driven pulley in the vertical direction. The driving pulley and the driven pulley are pivotally mounted on the base. The driving pulley is connected with a stepping motor for driving the driving pulley to rotate.

6. 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 face cover transfer module further comprise a conveying belt. The conveying belt is fixed on the machine table. One end of the conveying belt is close to the feeding mechanism, and the other end of the conveying belt is close to the annular track. When the first pneumatic clamping jaw is located at the second position, the first pneumatic clamping jaw is located above the conveying belt.

7. The PU wheel assembly line of claim 1, wherein, The screw bottom disc feeding module comprises: An inclined track is arranged outside the annular track. From the end of the inclined track away from the annular track, the inclined track is inclined downward toward the end of the inclined track close to the annular track. The lowermost end of the inclined track is provided with a horizontally arranged positioning groove. A second clamping jaw is used to clamp the screw bottom disc embedded in the positioning groove. The second clamping jaw can move horizontally on the machine table to move the screw bottom disc from the positioning groove to the tray.

8. The PU wheel assembly line of claim 1, wherein, The pressing module comprises: Two positioning blocks are arranged. The two positioning blocks are symmetrically arranged on both sides of the annular track and correspondingly arranged with the tray. The opposite sides of the positioning blocks are provided with clamping grooves. A telescopic cylinder is fixedly connected with 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 close to each other. A compression cylinder is provided with an avoiding hole in the middle. The avoiding hole is used for the screw bottom disc to extend into. The compression cylinder is located above the pressing station. A lifting cylinder is fixedly connected with the top end of the compression cylinder. The lifting cylinder is used to drive the compression cylinder to move up and down.

9. The PU wheel assembly line of claim 1, wherein, The top cover feeding module comprises: A first spiral vibration disc is used to convey the top cover. One end of a first conveying track is connected to the discharge end of the first spiral vibration disc. The other end of the first conveying track is provided with a limiting groove. The limiting groove is used to constrain the position of the top cover. A third clamping jaw is used to clamp the top cover on the first conveying track. The third clamping jaw can move horizontally on the machine table to move the top cover located in the limiting groove to the tray.

10. A PU wheel assembly method for controlling the PU wheel assembly line according to any one of claims 1 to 9, comprising the following steps: Step 1: The tray is moved to the screw bottom disc feeding station, and the screw bottom disc is placed on the tray by the screw bottom disc feeding module. Step 2: The tray is moved to the bottom cover transfer station, and the bottom cover is placed on the screw bottom disc by the bottom cover transfer module. Step 3: The tray is moved to the wheel moving station, and the wheel moving module places the wheel on the bottom cover; Step 4: The tray is moved to the face cover moving station, and the face cover moving module places the face cover on the wheel; Step 5: The tray is moved to the pressing station, and the pressing module presses the screw rod chassis, the bottom cover, the wheel, and the face cover on the tray tightly; Step 6: The tray is moved to the top cover loading station, and the top cover loading module places the tray on the face cover; Step 7: The tray is moved to the nut locking station, and the nut locking module sets the nut on the end of the screw rod chassis and tightens it; Step 8: The tray is moved to the material returning station, and the material returning module pushes the finished product tray out of the tray for collection; Step 9: Repeat steps 1 to 8.

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