Steering wheel production automation assembly line

Abstract

The invention discloses a steering wheel production automation assembly line which comprises a steering wheel die-casting machine, a steering wheel edge trimming machine and a steering wheel polyurethane high-pressure foaming machine. The three manipulators are used for feeding and discharging a steering wheel die-casting machine, a steering wheel edge trimming machine and a steering wheel polyurethane high-pressure foaming machine respectively; the conveying line is used for conveying steering wheels among the steering wheel die-casting machine, the steering wheel edge trimming machine and the steering wheel polyurethane high-pressure foaming machine; the conveying line comprises a double-layer rack, a plurality of conveying plate trailers movably arranged on the upper layer and the lower layer of the double-layer rack, positioning mechanisms fixed to the tops of the conveying plate trailers and used for positioning steering wheels, and a pair of exchanging mechanisms arranged at the two ends of the double-layer rack correspondingly and used for exchanging the upper layer and the lower layer of the conveying plate trailers. The moving mechanisms are arranged on the upper layer and the lower layer of the double-layer rack correspondingly and drive the two layers of conveying plate trailers to move synchronously. The device has the following advantages and effects that the effects of automatic feeding and discharging and automatic transferring and transporting of semi-finished steering wheels are achieved.

Description

Technical Field

[0001] The invention relates to the technical field of steering wheel production equipment, and in particular to an automated production line for steering wheels. Background Art

[0002] As an important part of the car, the quality and production efficiency of the steering wheel are directly related to the performance and manufacturing cost of the whole vehicle. With the rapid development of the automobile industry and the continuous improvement of consumers' requirements for automobile quality, the production of steering wheels is also facing more and more challenges. At present, the production process of steering wheels mainly includes the following steps: first, the steering wheel skeleton is cast by a die-casting machine; then, the edge of the steering wheel skeleton is precisely trimmed by a trimming machine to remove the excess flash and burrs of the steering wheel skeleton; then, the polyurethane material is coated on the steering wheel skeleton by a steering wheel polyurethane high-pressure foaming machine; finally, the steering wheel is polished, trimmed, and equipped with buttons, switches and other accessories to produce the steering wheel. However, in the actual production process of steering wheels, the loading and unloading of some equipment and the transfer and handling of semi-finished steering wheels between equipment are generally operated manually, which is not only inefficient and high in labor costs, but also has poor safety. Once the worker makes an error in operation, it is very easy to be injured by the burrs on the surface of the equipment or the semi-finished steering wheel. Summary of the invention

[0003] The purpose of the present invention is to provide an automated production line for steering wheels, which has the effects of automatic loading and unloading, and automatic transfer and transportation of semi-finished steering wheels.

[0004] The above technical objectives of the present invention are achieved through the following technical solutions: an automated steering wheel production line, comprising a steering wheel die-casting machine, a steering wheel trimming machine and a steering wheel polyurethane high-pressure foaming machine, as well as three manipulators for loading and unloading the steering wheel die-casting machine, the steering wheel trimming machine and the steering wheel polyurethane high-pressure foaming machine, and a conveyor line for transmitting steering wheels between the steering wheel die-casting machine, the steering wheel trimming machine and the steering wheel polyurethane high-pressure foaming machine, the conveyor line comprising a double-layer frame, a plurality of conveying carts movably arranged on the upper and lower layers of the double-layer frame, a positioning mechanism fixed to the top of the conveying cart and positioning the steering wheel, a pair of switching mechanisms respectively arranged at both ends of the double-layer frame and switching the upper and lower layers of the conveying carts, a pair of moving mechanisms respectively arranged on the upper and lower layers of the double-layer frame and respectively driving the two layers of the conveying carts to move synchronously, the steering wheel die-casting machine and the steering wheel trimming machine are respectively located at both ends of the double-layer frame, the steering wheel polyurethane high-pressure foaming machine is located on one side of the double-layer frame, and the three manipulators are respectively located between the three and the double-layer frame to transport the steering wheel.

[0005] The present invention is further configured as follows: the conveyor cart includes a body, a pair of axles parallel to each other and rotatably arranged at the bottom of the body, two pairs of H-shaped groove wheels respectively fixed on the axles, and two parallel tracks are respectively arranged on the upper and lower sides of the double-layer frame, and the two pairs of H-shaped groove wheels respectively roll on the two tracks.

[0006] The present invention is further configured as follows: the positioning mechanism includes a base fixed to the top of the vehicle body, a support column vertically fixed to the base, a positioning column fixed to the top of the support column and movable through the center hole of the steering wheel, and three fan-shaped positioning blocks fixed to the base and positioning the inner ring of the steering wheel, the three fan-shaped positioning blocks evenly surround the support column and are coaxial with the support column, and the gaps between the three fan-shaped positioning blocks respectively position the three connecting arms of the square plate.

[0007] The present invention is further configured as follows: the switching mechanism includes a support plate horizontally fixed in the middle of the lower layer of the double-layer frame, a hydraulic cylinder fixed to the bottom of the support plate and with a piston rod passing through the support plate, a lifting plate one fixed to the top of the piston rod of the hydraulic cylinder and located parallel to the support plate, and a pair of long protrusions fixed to the top of the lifting plate one and for two pairs of H-shaped groove wheels at the bottom of the vehicle body to roll respectively. The lifting plates one of the two switching mechanisms are respectively located at the two ends of the track. When the two long protrusions are aligned with the two tracks of the upper or lower layer of the double-layer frame, the H-shaped groove wheels can roll on the long protrusions from the track.

[0008] The present invention is further configured as follows: four vertical guide rods are fixedly arranged at a bottom of the lifting plate, and the four guide rods evenly surround the hydraulic cylinder piston rod and slide through the support plate.

[0009] The present invention is further configured as follows: the moving mechanism includes a pair of rotating shafts 1 that are parallel to each other and rotatably arranged on the upper layer or lower layer of the double-layer frame, two pairs of sprockets respectively fixed on the two rotating shafts 1, two chains respectively mounted on the two pairs of sprockets, a worm gear reduction motor fixed on the double-layer frame and connected to a rotating shaft 1 at the output end, multiple pairs of insertion rods on the two chains and arranged on the chains in sequence, a pair of U-shaped plates respectively fixed on both sides of the car body and for the insertion rods to be inserted up and down, the car body, track, lifting plate 1, and support plate are located between the two chains on the upper layer and the lower layer of the double-layer frame, and the activity area of ​​each layer of the car body does not exceed the two ends of the chain, the positions of the upper insertion rod and the lower insertion rod of the double-layer frame on the chain are consistent, and are aligned up and down in sequence, the upper chain and the lower chain of the double-layer frame intermittently move in opposite directions, and the distance of each chain movement is equal to the spacing between adjacent insertion rods on the chain.

[0010] The present invention is further configured as follows: it also includes a laser marking machine, which is installed on the upper layer of the double-layer frame, and the output end of the laser marking machine is facing the top of a vehicle body, and the laser marking machine is located between the steering wheel polyurethane high-pressure foaming machine and the steering wheel trimming machine.

[0011] The present invention is further configured to include a plurality of cooling fans, which are fixedly installed in the middle of the upper and lower layers of the double-layer rack, and the air outlets of the cooling fans are respectively facing the tops of all the vehicles on the lower track of the double-layer rack.

[0012] The present invention is further configured as follows: it also includes a steering wheel storage mechanism, which is located on one side of the steering wheel polyurethane high-pressure foaming machine and the middle manipulator of the double-layer frame, and the steering wheel storage mechanism includes a mobile cart, a lifting plate 2 that is lifted and arranged inside the mobile cart and horizontally located on the bottom plate of the mobile cart, a lifting component that drives the lifting plate 2 to lift up and down, and six support rods that are vertically fixed to the bottom plate of the mobile cart and can move through the lifting plate 2. The six support rods are distributed in two columns and three rows on the bottom plate of the mobile cart and can move through the center hole of the steering wheel. Six circular bosses are fixedly arranged on the top of the lifting plate 2, and the six support rods can move through the centers of the six circular bosses respectively.

[0013] The present invention is further configured as follows: the lifting assembly includes a pair of screw rods vertically rotatably arranged on the bottom plate of the mobile cart and movably passing through the lifting plate 2, a pair of nuts fixed to the top of the lifting plate 2 and respectively threadedly connected to the two screw rods, a pair of worm wheels respectively fixed to the lower ends of the two screw rods, a rotating shaft 2 horizontally rotatably arranged inside the mobile cart, a pair of worm gears fixed on the rotating shaft 2 and respectively meshing with the two worm gears, a servo motor fixed on the mobile cart and the output end of which is connected to one end of the rotating shaft 2; a pair of n-type plates respectively covering the two pairs of worm gears and worm gears are fixed on the bottom plate of the mobile cart, the rotating shaft 2 and the screw rod respectively rotate through the two sides and the top of the n-type plate, the servo motor is fixed on the outer wall of the side plate of the mobile cart, one end of the rotating shaft 2 rotates through the side plate of the mobile cart and is fixedly connected to the output end of the servo motor.

[0014] The beneficial effects of the present invention are:

[0015] 1. By adopting the above-mentioned manipulator and conveyor line, not only can they cooperate with each other to realize the automatic loading and unloading and automatic transfer and handling functions of the steering wheel, but also the movable double-layer conveyor cart and the replacement mechanism for replacing the upper and lower conveyor carts in the conveyor line can realize the recycling of the conveyor carts. At the same time, under the condition that the positions between the three equipments are relatively crowded, a longer conveying distance can be left between the steering wheel die-casting machine and the steering wheel trimming machine. In this way, sufficient cooling time is provided for the high-temperature square disc skeleton just out of the steering wheel die-casting machine.

[0016] 2. By adopting the above-mentioned conveyor cart structure, it is not only possible to cooperate with the track on the double-layer frame to smoothly and efficiently transport and transfer the steering wheel frame, but also to cooperate with the positioning columns, fan-shaped positioning blocks and other positioning structures on the top of the conveyor cart to effectively position the steering wheel on the top of the conveyor cart, so as to ensure that the manipulators for loading and unloading the steering wheel trimming machine and the steering wheel polyurethane high-pressure foaming machine can accurately grasp the steering wheel frame and accurately place it in the processing position in the equipment.

[0017] 3. By adopting the above two moving mechanism structures, not only can the upper and lower layers of the double-layer frame be driven to move stably, but also the switching mechanism can be perfectly coordinated to achieve that after the upper and lower layers of the transport pallets are switched, they can quickly adapt to and cooperate with the moving mechanism of the layer.

[0018] 4. By adopting the above-mentioned steering wheel storage mechanism, not only can the steering wheels be stored safely and stably, but the main structure of the cart can also be easily moved, so that the staff can take away the steering wheel storage mechanism that is full of steering wheels and quickly replace it with an empty steering wheel storage mechanism, thereby ensuring the smooth operation of this assembly line. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0020] Figure 1 is a top view of this embodiment;

[0021] Figure 2 It is a structural schematic diagram of the conveying line of this embodiment;

[0022] Figure 3 It is a schematic diagram of the structure of the positioning mechanism, the switching mechanism and the moving mechanism of this embodiment;

[0023] Figure 4 is a schematic diagram of the structure of the exchange mechanism and the moving mechanism of this embodiment, and a schematic diagram of the position of the cooling fan;

[0024] Figure 5 It is a structural schematic diagram of the conveying plate car of this embodiment;

[0025] Figure 6 is a structural schematic diagram of the steering wheel storage mechanism of this embodiment;

[0026] Figure 7 is a schematic diagram of the structure of the lifting assembly of this embodiment;

[0027] In the figure, 1, a steering wheel die-casting machine; 2, a steering wheel trimming machine; 3, a steering wheel polyurethane high-pressure foaming machine; 4, a manipulator; 5, a conveyor line; 51, a double-layer frame; 511, a track; 52, a conveyor truck; 521, a vehicle body; 522, an axle; 523, an H-shaped groove wheel; 53, a positioning mechanism; 531, a base; 532, a support column; 533, a positioning column; 534, a fan-shaped positioning block; 54, a switching mechanism; 541, a support plate; 542, a hydraulic cylinder; 543, a lifting plate 1; 544, a long protrusion; 545, a guide Rod; 55, moving mechanism; 551, rotating shaft one; 552, sprocket; 553, chain; 554, worm gear reduction motor; 556, plug rod; 557, U-shaped plate; 6, laser marking machine; 7, cooling fan; 8, steering wheel storage mechanism; 81, mobile cart; 811, n-shaped plate; 82, lifting plate two; 821, circular boss; 83, lifting assembly; 831, screw rod; 832, nut; 833, worm wheel; 834, rotating shaft two; 835, worm; 836, servo motor; 84, support rod. DETAILED DESCRIPTION

[0028] The technical solution of the present invention will be clearly and completely described below in conjunction with specific embodiments. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] Embodiment: A steering wheel production automation line, such as Figure 1 , Figure 2 As shown, it includes a steering wheel die-casting machine 1, a steering wheel trimming machine 2 and a steering wheel polyurethane high-pressure foaming machine 3, as well as three manipulators 4 for loading and unloading the steering wheel die-casting machine 1, the steering wheel trimming machine 2 and the steering wheel polyurethane high-pressure foaming machine 3, and a conveyor line 5 for conveying steering wheels between the steering wheel die-casting machine 1, the steering wheel trimming machine 2 and the steering wheel polyurethane high-pressure foaming machine 3. The conveyor line 5 includes a double-layer frame 51, a plurality of conveyor pallets 52 movably arranged on the upper and lower layers of the double-layer frame 51, and a conveyor plate 52 fixed on the top of the conveyor pallet 52. There are also a positioning mechanism 53 for positioning the steering wheel, a pair of switching mechanisms 54 which are respectively arranged at both ends of the double-layer frame 51 and switch the upper and lower conveying pallets 52, a pair of moving mechanisms 55 which are respectively arranged on the upper and lower layers of the double-layer frame 51 and respectively drive the two layers of conveying pallets 52 to move synchronously, the steering wheel die-casting machine 1 and the steering wheel trimming machine 2 are respectively located at both ends of the double-layer frame 51, the steering wheel polyurethane high-pressure foaming machine 3 is located on one side of the double-layer frame 51, and three manipulators 4 are respectively located between the three and the double-layer frame 51 to transport the steering wheel.

[0030] like Figure 5As shown, the conveyor cart 52 includes a body 521, a pair of axles 522 parallel to each other and rotatably arranged at the bottom of the body 521, two pairs of H-shaped groove wheels 523 respectively fixed on the axles 522, and two parallel tracks 511 are respectively arranged on the upper and lower sides of the double-layer frame 51, and the two pairs of H-shaped groove wheels 523 roll on the two tracks 511 respectively.

[0031] like Figure 2 , Figure 3 As shown, the positioning mechanism 53 includes a base 531 fixed to the top of the vehicle body 521, a support column 532 vertically fixed to the base 531, a positioning column 533 fixed to the top of the support column 532 and movable through the center hole of the steering wheel, and three fan-shaped positioning blocks 534 fixed to the base 531 and positioning the inner circle of the steering wheel. The three fan-shaped positioning blocks 534 are evenly surrounded by the support column 532 and are coaxial with the support column 532. The gaps between the three fan-shaped positioning blocks 534 respectively position the three connecting arms of the square plate.

[0032] like Figure 2-4 As shown, the switching mechanism 54 includes a support plate 541 horizontally fixed in the middle of the lower layer of the double-layer frame 51, a hydraulic cylinder 542 fixed to the bottom of the support plate 541 and with a piston rod passing through the support plate 541, a lifting plate 543 fixed to the top of the piston rod of the hydraulic cylinder 542 and located parallel to the support plate 541, and a pair of long protrusions 544 fixed to the top of the lifting plate 543 and for two pairs of H-shaped groove wheels 523 at the bottom of the vehicle body 521 to roll respectively. The lifting plates 543 of the two switching mechanisms 54 are respectively located at the two ends of the track 511. When the two long protrusions 544 are aligned with the two tracks 511 on the upper or lower layer of the double-layer frame 51, the H-shaped groove wheels 523 can roll on the long protrusions 544 from the track 511.

[0033] like Figure 2-4As shown, the moving mechanism 55 includes a pair of rotating shafts 551 parallel to each other and rotatably arranged on the upper or lower layer of the double-layer frame 51, two pairs of sprockets 552 respectively fixed on the two rotating shafts 551, two chains 553 respectively sleeved on the two pairs of sprockets 552, a worm gear reduction motor 554 fixed on the double-layer frame 51 and connected to the rotating shaft 551 at the output end, a plurality of pairs of insertion rods 556 respectively on the two chains 553 and arranged on the chains 553 in sequence, and a pair of U-shaped Plate 557, car body 521, track 511, lifting plate 543, and support plate 541 are located between the two chains 553 on the upper and lower layers of the double-layer rack 51, and the activity area of ​​each layer of the car body 521 does not exceed the two ends of the chain 553. The positions of the upper plug rod 556 and the lower plug rod 556 of the double-layer rack 51 on the chain 553 are consistent and aligned up and down in sequence. The upper chain 553 and the lower chain 553 of the double-layer rack 51 intermittently move in opposite directions, and the distance of each movement of the chain 553 is equal to the spacing between adjacent plug rods 556 on the chain 553.

[0034] like Figure 3 , Figure 4 As shown, four vertical guide rods 545 are fixedly arranged at the bottom of the lifting plate 1 543, and the four guide rods 545 evenly surround the piston rod of the hydraulic cylinder 542 and slide through the support plate 541. By adopting the above-mentioned guide rods 545, the lifting stability of the lifting plate 1 543 can be further guaranteed.

[0035] like Figure 1 , Figure 2 As shown, a laser marking machine 6 is also included, which is installed on the upper layer of the double-layer frame 51, and the output end of the laser marking machine 6 is facing the top of a car body 521. The laser marking machine 6 is located between the steering wheel polyurethane high-pressure foaming machine 3 and the steering wheel trimming machine 2. By using the above-mentioned laser marking machine 6, after the steering wheel undergoes trimming processing and is transferred to the steering wheel polyurethane high-pressure foaming machine 3, the production number can be printed on the top of the steering wheel frame for subsequent shipment.

[0036] like Figure 4 As shown, it also includes a plurality of cooling fans 7, which are fixedly installed in the middle of the upper layer and the lower layer of the double-layer frame 51, and the air outlets of each cooling fan 7 are respectively facing the top of all the car bodies 521 on the lower track 511 of the double-layer frame 51. By using the cooling fans 7, the steering wheel frame on the top of the car body 521 can be quickly cooled down while the car body 521 is moving on the lower layer, thereby shortening the time required for cooling down the steering wheel frame and ensuring that the steering wheel frame is fully cooled before trimming.

[0037] like Figure 1 , Figure 6As shown, it also includes a steering wheel storage mechanism 8, which is located on one side of the steering wheel polyurethane high-pressure foaming machine 3 and the middle manipulator 4 of the double-layer frame 51. The steering wheel storage mechanism 8 includes a mobile cart 81, a lifting plate 82 that is lifted and arranged inside the mobile cart 81 and horizontally located on the bottom plate of the mobile cart 81, a lifting component 83 that drives the lifting plate 82 to move up and down, and six support rods 84 that are vertically fixed to the bottom plate of the mobile cart 81 and can move through the lifting plate 82. The six support rods 84 are distributed on the bottom plate of the mobile cart 81 in two columns and three rows, and can move through the center hole of the steering wheel. Six circular bosses 821 are fixedly arranged on the top of the lifting plate 82, and the six support rods 84 can move through the centers of the six circular bosses 821 respectively.

[0038] By adopting the above-mentioned steering wheel storage mechanism 8, when the steering wheel needs to be stored, the manipulator 4 first places the coated steering wheel on the six circular bosses 821 on the lifting plate 2 82 in sequence, and aligns the center hole of the steering wheel and the support rod 84 passing through the circular boss 821. Then the lifting assembly 83 drives the lifting plate 2 82 to descend to a certain height, so that the center hole of the steering wheel is relatively penetrated by the six support rods 84 respectively, so as to simply position the steering wheel. Finally, the manipulator 4 continuously repeats the above-mentioned operation, so that the steering wheels can be continuously stacked on the circular boss 821, and the position of the steering wheel is fixed by passing the support rod 84 through the center hole of the steering wheel to ensure the stability of the stacking of the steering wheels.

[0039] like Figure 6 , Figure 7 As shown, the lifting assembly 83 includes a pair of screw rods 831 vertically rotatably arranged on the bottom plate of the mobile cart 81 and movably passing through the lifting plate 82, a pair of nuts 832 fixed to the top of the lifting plate 82 and respectively threadedly connected to the two screw rods 831, a pair of worm gears 833 respectively fixed to the lower ends of the two screw rods 831, a rotating shaft 834 horizontally rotatably arranged inside the mobile cart 81, a pair of worms 835 fixed on the rotating shaft 834 and respectively meshing with the two worm gears 833, and a pair of worms 836 fixed to the moving cart 81. A servo motor 836 is mounted on the trolley 81 and its output end is connected to one end of the second rotating shaft 834. A pair of n-type plates 811 respectively covering two pairs of worm gears 833 and worm 835 are fixedly arranged on the bottom plate of the mobile trolley 81. The second rotating shaft 834 and the lead screw 831 rotate through the two sides and the top of the n-type plate 811 respectively. The servo motor 836 is fixed on the outer wall of the side plate of the mobile trolley 81. One end of the second rotating shaft 834 rotates through the side plate of the mobile trolley 81 and is fixedly connected to the output end of the servo motor 836.

[0040] By adopting the above-mentioned lifting assembly 83, when it is necessary to drive the lifting plate 82 to rise and fall, the servo motor 836 first drives the rotating shaft 834 to rotate, so that the worm 835 on the rotating shaft 834 engages with the transmission worm wheel 833, and then the two worm wheels 833 respectively drive the two screw rods 831 to rotate synchronously, and finally, because the screw rod 831 passes through the lifting plate 82, and the top of the lifting plate 82 is fixed with a nut 832 threadedly connected to the screw rod 831, under the rotation of the screw rod 831, the nut 832 will drive the lifting plate 82 to rise and fall along the vertical direction of the screw rod 831. Among them, the n-type plate 811 can not only support the stable rotation of the rotating shaft 834 and the screw rod 831, but also hide and protect the transmission safety of the worm wheel 833 and the worm rod 835.

[0041] The working principle of this embodiment:

[0042] In the initial state, the number of car bodies 521 on the double-layer upper track 511 and the lower track 511 is equal, and a car body 521 is parked on the lifting plate 1 543 close to the steering wheel trimmer 2, and the long protrusions 544 of the lifting plate 1 543 and the other lifting plate are flush with the height of the upper track 511. When the manipulator 4 takes out the steering wheel skeleton cast in the steering wheel die-casting machine 1, the worm gear reduction motor 554 on the upper layer will first drive the rotating shaft 1 551 to rotate, so that the rotating shaft 1 551 drives the two chains 553 to move through the two sprockets 552. Since the U-shaped plates 557 on both sides of the car body 521 are inserted by the insertion rods 556 of the two chains 553, under the movement of the two chains 553, all the car bodies 521 on the upper track 511 and the car bodies 521 parked on the lifting plate 1 543 will move forward a distance in the direction of the steering wheel die-casting machine 1 together, until the first car body 521 on the upper layer moves onto the lifting plate 1 543 (the lifting plate 1 543 closest to the steering wheel die-casting machine 1) and the last car body 521 on the upper layer leaves from above another lifting plate 1 543 (the lifting plate 1 543 closest to the steering wheel trimming machine 2);

[0043] Next, the manipulator 4 beside the steering wheel die-casting machine 1 takes out the steering wheel frame from the steering wheel die-casting machine 1, places it on the top of the upper first car body 521, and makes the inner ring of the steering wheel frame be set on the three fan-shaped positioning blocks 534, the three connecting arms of the steering wheel frame are respectively inserted into the gaps of the fan-shaped positioning blocks 534, and the central hole sleeve of the steering wheel frame is set on the positioning column 533, so as to ensure that the steering wheel frame is stably positioned on the top of the car body 521;

[0044] Then, the hydraulic cylinder 542 under the upper first car body 521 automatically retracts the piston rod, causing the lifting plate 1 543 to descend together with the upper first car body 521. When the upper first car body 521 is flush with the car body 521 on the lower track 511, since the upper layer plug rod 556 and the lower layer plug rod 556 of the double-layer frame 51 are in the same position on the chain 553 and are aligned up and down in sequence, the upper layer plug rod 556 will relatively leave the two sides of the car body 521 during the descent of the upper first car body 521. The middle part of the U-shaped plate 557 and the lower insertion rod 556 are relatively inserted into the middle part of the U-shaped plates 557 on both sides of the car body 521, and in this way, the upper first car body 521 is perfectly replaced from the upper layer to the lower layer; at the same time, the hydraulic cylinder 542 close to the steering wheel trimmer 2 retracts the piston rod synchronously, so that the lifting plate 543 close to the steering wheel trimmer 2 descends, and until the long protrusion 544 on its top is flush with the height of the lower track 511, so as to prepare for the lower car body 521 to move in.

[0045] Afterwards, the worm gear reduction motor 554 on the lower layer drives the rotating shaft 551 to which it is connected to rotate, and through the sprocket 552, chain 553 and plug rod 556 on the lower layer, drives all the car bodies 521 on the lower track 511 and the upper first car body 521 that has been switched to the lower layer to move forward a distance in the direction of the steering wheel trimmer 2, and until the lower first car body 521 moves onto the lifting plate 543 (the lifting plate 543 closest to the steering wheel trimmer 2) and the upper first car body 521 at the end of the lower layer leaves from above another lifting plate 543 (the lifting plate 543 closest to the steering wheel die-casting machine 1), the hydraulic cylinder 542 under the lower first car body 521 is The piston rod will be extended immediately, so that the lifting plate 543 and the first lower car body 521 are raised. When the first lower car body 521 is flush with the car body 521 on the upper track 511, since the upper chain 553 and the lower chain 553 of the double-layer frame 51 move intermittently in opposite directions, and the distance of each movement of the chain 553 is equal to the spacing between the adjacent plug rods 556 on the chain 553, after the lower sprocket 552 moves, the plug rod 556 on it is still aligned with the plug rod 556 of the upper chain 553, which not only realizes the perfect exchange of the first lower car body 521 from the lower layer to the upper layer, but also restores the entire conveyor line 5 to its original state and completes a cycle;

[0046] Finally, after several cycles, the original upper first car body 521 is not only replaced back to the upper layer again, but the movement process of the lower layer of the car body 521 can also provide sufficient cooling time for the steering wheel skeleton on its top. If at this time the original upper first car body 521 stays on the lifting plate 543 next to the steering wheel trimmer 2, and the long protrusion 544 of the lifting plate 543 is flush with the upper track 511, the manipulator 4 next to the steering wheel trimmer 2 will automatically remove the steering wheel skeleton on the top of the car body 521 and put it into the steering wheel trimmer 2 for trimming. Before the next cycle starts, the manipulator 4 puts the trimmed steering wheel skeleton back onto the car body 521; if the original upper first car body 521 stays at the middle position of the upper track 511 at this time, the manipulator 4 next to the steering wheel polyurethane high pressure foaming machine 3 will automatically take down the trimmed steering wheel skeleton on the top of the car body 521, and put it into the steering wheel polyurethane high pressure foaming machine 3 for polyurethane coating. Before the next cycle starts, the manipulator 4 puts the coated steering wheel skeleton into the steering wheel storage mechanism 8, and the top of the car body 521 leaves empty to prepare for receiving a new steering wheel skeleton in the subsequent cycle.

Claims

1. An automated production line for steering wheels, comprising a steering wheel die-casting machine (1), a steering wheel trimming machine (2) and a steering wheel polyurethane high-pressure foaming machine (3), characterized in that: The invention also comprises three manipulators (4) for loading and unloading the steering wheel die-casting machine (1), the steering wheel trimming machine (2) and the steering wheel polyurethane high-pressure foaming machine (3), and a conveyor line (5) for conveying the steering wheel between the steering wheel die-casting machine (1), the steering wheel trimming machine (2) and the steering wheel polyurethane high-pressure foaming machine (3), wherein the conveyor line (5) comprises a double-layer frame (51), a plurality of conveyor pallets (52) movably arranged on the upper and lower layers of the double-layer frame (51), a positioning mechanism (53) fixed on the top of the conveyor pallet (52) and positioning the steering wheel, and a A pair of exchange mechanisms (54) are respectively arranged at the two ends of the double-layer frame (51) and exchange the upper and lower conveying pallets (52); a pair of moving mechanisms (55) are respectively arranged on the upper and lower layers of the double-layer frame (51) and drive the two layers of conveying pallets (52) to move synchronously; the steering wheel die-casting machine (1) and the steering wheel trimming machine (2) are respectively located at the two ends of the double-layer frame (51); the steering wheel polyurethane high-pressure foaming machine (3) is located on one side of the double-layer frame (51); and three manipulators (4) are respectively located between the three manipulators and the double-layer frame (51) to transport the steering wheel.

2. The automated production line for steering wheels according to claim 1, characterized in that: The conveying plate cart (52) comprises a vehicle body (521), a pair of axles (522) parallel to each other and rotatably arranged at the bottom of the vehicle body (521), and two pairs of H-shaped groove wheels (523) respectively fixed on the axles (522); two parallel tracks (511) are respectively arranged on the upper and lower sides of the double-layer frame (51), and the two pairs of H-shaped groove wheels (523) respectively roll on the two tracks (511).

3. The automated production line for steering wheels according to claim 2, characterized in that: The positioning mechanism (53) comprises a base (531) fixed on the top of the vehicle body (521), a support column (532) vertically fixed on the base (531), a positioning column (533) fixed on the top of the support column (532) and movably passing through the central hole of the steering wheel, and three fan-shaped positioning blocks (534) fixed on the base (531) and positioning the inner circle of the steering wheel. The three fan-shaped positioning blocks (534) evenly surround the support column (532) and are coaxial with the support column (532). The gaps between the three fan-shaped positioning blocks (534) respectively position the three connecting arms of the square plate.

4. The automated production line for steering wheels according to claim 2, characterized in that: The switching mechanism (54) comprises a support plate (541) fixed horizontally to the middle of the lower layer of the double-layer frame (51), a hydraulic cylinder (542) fixed to the bottom of the support plate (541) and with a piston rod passing through the support plate (541), a lifting plate (543) fixed to the top of the piston rod of the hydraulic cylinder (542) and located parallel to the support plate (541), and a pair of long protrusions (544) fixed to the top of the lifting plate (543) and provided for two pairs of H-shaped groove wheels (523) at the bottom of the vehicle body (521) to roll respectively. The lifting plates (543) of the two switching mechanisms (54) are respectively located at the two ends of the track (511). When the two long protrusions (544) are aligned with the two tracks (511) on the upper layer or the lower layer of the double-layer frame (51), the H-shaped groove wheels (523) can roll from the track (511) onto the long protrusions (544).

5. The automated production line for steering wheels according to claim 4, characterized in that: Four vertical guide rods (545) are fixedly arranged at the bottom of the lifting plate (543). The four guide rods (545) evenly surround the piston rod of the hydraulic cylinder (542) and slide through the support plate (541).

6. The automated production line for steering wheels according to claim 2, characterized in that: The moving mechanism (55) comprises a pair of rotating shafts (551) parallel to each other and rotatably arranged on the upper layer or the lower layer of the double-layer frame (51), two pairs of sprocket wheels (552) respectively fixed on the two rotating shafts (551), two chains (553) respectively sleeved on the two pairs of sprocket wheels (552), a worm gear reduction motor (554) fixed on the double-layer frame (51) and having an output end connected to the rotating shaft (551), a plurality of pairs of insertion rods (556) respectively on the two chains (553) and arranged on the chains (553) in sequence, and a pair of U-shaped plates (557) respectively fixed on both sides of the vehicle body (521) and for the insertion rods (556) to be inserted up and down, The car body (521), the track (511), the lifting plate (543), and the support plate (541) are located between the two chains (553) on the upper and lower layers of the double-layer frame (51), and the movable area of ​​each layer of the car body (521) does not exceed the two ends of the chain (553). The positions of the upper layer plug rod (556) and the lower layer plug rod (556) of the double-layer frame (51) on the chain (553) are consistent and aligned up and down in sequence. The upper layer chain (553) and the lower layer chain (553) of the double-layer frame (51) intermittently move in opposite directions, and the distance of each movement of the chain (553) is equal to the spacing between adjacent plug rods (556) on the chain (553).

7. The automated production line for steering wheels according to claim 2, characterized in that: The invention also comprises a laser marking machine (6), wherein the laser marking machine (6) is installed on the upper layer of the double-layer frame (51), and the output end of the laser marking machine (6) faces the top of a vehicle body (521), and the laser marking machine (6) is located between the steering wheel polyurethane high-pressure foaming machine (3) and the steering wheel trimming machine (2).

8. The automated production line for steering wheels according to claim 2, characterized in that: It also includes a plurality of cooling fans (7), wherein the cooling fans (7) are fixedly installed at the middle position between the upper layer and the lower layer of the double-layer frame (51), and the air outlets of the cooling fans (7) are respectively facing the tops of all the vehicle bodies (521) on the lower track (511) of the double-layer frame (51).

9. The automated production line for steering wheels according to claim 1, characterized in that: The invention also comprises a steering wheel storage mechanism (8), the steering wheel storage mechanism (8) being located on one side of the steering wheel polyurethane high-pressure foaming machine (3) and the middle manipulator (4) of the double-layer frame (51), the steering wheel storage mechanism (8) comprising a mobile cart (81), a lifting plate (82) which is lifted and arranged inside the mobile cart (81) and is horizontally arranged on the bottom plate of the mobile cart (81), a lifting assembly (83) which drives the lifting plate (82) to lift up and down, six support rods (84) which are vertically fixed on the bottom plate of the mobile cart (81) and can movably pass through the lifting plate (82), the six support rods (84) being distributed on the bottom plate of the mobile cart (81) in two rows and three columns and can movably pass through the center hole of the steering wheel, six circular bosses (821) being fixedly arranged on the top of the lifting plate (82), and the six support rods (84) respectively movably pass through the centers of the six circular bosses (821).

10. The automated production line for steering wheels according to claim 9, characterized in that: The lifting assembly (83) comprises a pair of screw rods (831) vertically rotatably arranged on the bottom plate of the moving cart (81) and movably passing through the second lifting plate (82), a pair of nuts (832) fixed to the top of the second lifting plate (82) and respectively threadedly connected to the two screw rods (831), a pair of worm wheels (833) respectively fixed to the lower ends of the two screw rods (831), a second rotating shaft (834) horizontally rotatably arranged inside the moving cart (81), a pair of worms (835) fixed on the second rotating shaft (834) and respectively meshing with the two worm wheels (833), and a pair of nuts (832) fixed to the top of the second lifting plate (82) and respectively threadedly connected to the two screw rods (831). A servo motor (836) is mounted on the bottom plate of the mobile cart (81) and the output end is connected to one end of the second rotating shaft (834). A pair of n-type plates (811) are fixedly arranged on the bottom plate of the mobile cart (81) and are respectively covered with two pairs of worm wheels (833) and worms (835). The second rotating shaft (834) and the lead screw (831) rotate through the two sides and the top of the n-type plate (811) respectively. The servo motor (836) is fixed on the outer wall of the side plate of the mobile cart (81). One end of the second rotating shaft (834) rotates through the side plate of the mobile cart (81) and is fixedly connected to the output end of the servo motor (836).

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